/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ // vim:cindent:ts=2:et:sw=2: /* ***** BEGIN LICENSE BLOCK ***** * Version: MPL 1.1/GPL 2.0/LGPL 2.1 * * The contents of this file are subject to the Mozilla Public License Version * 1.1 (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * http://www.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the * License. * * The Original Code is mozilla.org code. * * The Initial Developer of the Original Code is * Netscape Communications Corporation. * Portions created by the Initial Developer are Copyright (C) 1998 * the Initial Developer. All Rights Reserved. * * Contributor(s): * Dan Rosen * Mats Palmgren * * Alternatively, the contents of this file may be used under the terms of * either of the GNU General Public License Version 2 or later (the "GPL"), * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), * in which case the provisions of the GPL or the LGPL are applicable instead * of those above. If you wish to allow use of your version of this file only * under the terms of either the GPL or the LGPL, and not to allow others to * use your version of this file under the terms of the MPL, indicate your * decision by deleting the provisions above and replace them with the notice * and other provisions required by the GPL or the LGPL. If you do not delete * the provisions above, a recipient may use your version of this file under * the terms of any one of the MPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** */ /* * construction of a frame tree that is nearly isomorphic to the content * tree and updating of that tree in response to dynamic changes */ #include "nsCSSFrameConstructor.h" #include "nsCRT.h" #include "nsIAtom.h" #include "nsIURL.h" #include "nsISupportsArray.h" #include "nsHashtable.h" #include "nsIHTMLDocument.h" #include "nsIStyleRule.h" #include "nsIFrame.h" #include "nsGkAtoms.h" #include "nsPresContext.h" #include "nsILinkHandler.h" #include "nsIDocument.h" #include "nsTableFrame.h" #include "nsTableColGroupFrame.h" #include "nsTableColFrame.h" #include "nsIDOMHTMLDocument.h" #include "nsIDOMHTMLTableColElement.h" #include "nsIDOMHTMLTableCaptionElem.h" #include "nsHTMLParts.h" #include "nsIPresShell.h" #include "nsStyleSet.h" #include "nsIViewManager.h" #include "nsIEventStateManager.h" #include "nsIScrollableView.h" #include "nsStyleConsts.h" #include "nsTableOuterFrame.h" #include "nsIDOMXULElement.h" #include "nsHTMLContainerFrame.h" #include "nsINameSpaceManager.h" #include "nsIDOMHTMLSelectElement.h" #include "nsIDOMHTMLLegendElement.h" #include "nsIComboboxControlFrame.h" #include "nsIListControlFrame.h" #include "nsISelectControlFrame.h" #include "nsIRadioControlFrame.h" #include "nsICheckboxControlFrame.h" #include "nsIDOMCharacterData.h" #include "nsIDOMHTMLImageElement.h" #include "nsPlaceholderFrame.h" #include "nsTableRowGroupFrame.h" #include "nsStyleChangeList.h" #include "nsIFormControl.h" #include "nsCSSAnonBoxes.h" #include "nsCSSPseudoElements.h" #include "nsIDeviceContext.h" #include "nsTextFragment.h" #include "nsISupportsArray.h" #include "nsIAnonymousContentCreator.h" #include "nsFrameManager.h" #include "nsLegendFrame.h" #include "nsIContentIterator.h" #include "nsBoxLayoutState.h" #include "nsBindingManager.h" #include "nsXBLBinding.h" #include "nsITheme.h" #include "nsContentCID.h" #include "nsContentUtils.h" #include "nsIScriptError.h" #include "nsIDocShell.h" #include "nsIDocShellTreeItem.h" #include "nsObjectFrame.h" #include "nsRuleNode.h" #include "nsIDOMMutationEvent.h" #include "nsChildIterator.h" #include "nsCSSRendering.h" #include "nsISelectElement.h" #include "nsLayoutErrors.h" #include "nsLayoutUtils.h" #include "nsAutoPtr.h" #include "nsBoxFrame.h" #include "nsIBoxLayout.h" #include "nsImageFrame.h" #include "nsIObjectLoadingContent.h" #include "nsContentErrors.h" #include "nsIPrincipal.h" #include "nsIDOMWindowInternal.h" #include "nsBox.h" #ifdef MOZ_XUL #include "nsIRootBox.h" #include "nsIDOMXULCommandDispatcher.h" #include "nsIDOMXULDocument.h" #include "nsIXULDocument.h" #endif #ifdef ACCESSIBILITY #include "nsIAccessibilityService.h" #include "nsIAccessibleEvent.h" #endif #include "nsInlineFrame.h" #include "nsBlockFrame.h" #include "nsIScrollableFrame.h" #include "nsIXBLService.h" #undef NOISY_FIRST_LETTER #ifdef MOZ_MATHML #include "nsMathMLParts.h" #endif nsIFrame* NS_NewHTMLCanvasFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); #ifdef MOZ_SVG #include "nsISVGTextContentMetrics.h" #include "nsStyleUtil.h" PRBool NS_SVGEnabled(); nsIFrame* NS_NewSVGOuterSVGFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsStyleContext* aContext); nsIFrame* NS_NewSVGInnerSVGFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsStyleContext* aContext); nsIFrame* NS_NewSVGPathGeometryFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsStyleContext* aContext); nsIFrame* NS_NewSVGGFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsStyleContext* aContext); nsIFrame* NS_NewSVGGenericContainerFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsStyleContext* aContext); #ifdef MOZ_SVG_FOREIGNOBJECT nsIFrame* NS_NewSVGForeignObjectFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsStyleContext* aContext); #endif nsIFrame* NS_NewSVGAFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsStyleContext* aContext); nsIFrame* NS_NewSVGGlyphFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsIFrame* parent, nsStyleContext* aContext); nsIFrame* NS_NewSVGTextFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsStyleContext* aContext); nsIFrame* NS_NewSVGTSpanFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsIFrame* parent, nsStyleContext* aContext); nsIFrame* NS_NewSVGContainerFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsStyleContext* aContext); nsIFrame* NS_NewSVGUseFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsStyleContext* aContext); PRBool NS_SVG_TestFeatures (const nsAString& value); PRBool NS_SVG_TestsSupported (const nsIAtom *atom); PRBool NS_SVG_LangSupported (const nsIAtom *atom); extern nsIFrame* NS_NewSVGLinearGradientFrame(nsIPresShell *aPresShell, nsIContent *aContent, nsStyleContext* aContext); extern nsIFrame* NS_NewSVGRadialGradientFrame(nsIPresShell *aPresShell, nsIContent *aContent, nsStyleContext* aContext); extern nsIFrame* NS_NewSVGStopFrame(nsIPresShell *aPresShell, nsIContent *aContent, nsIFrame *aParentFrame, nsStyleContext* aContext); nsIFrame* NS_NewSVGMarkerFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsStyleContext* aContext); extern nsIFrame* NS_NewSVGImageFrame(nsIPresShell *aPresShell, nsIContent *aContent, nsStyleContext* aContext); nsIFrame* NS_NewSVGClipPathFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsStyleContext* aContext); nsIFrame* NS_NewSVGTextPathFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsIFrame* parent, nsStyleContext* aContext); nsIFrame* NS_NewSVGFilterFrame(nsIPresShell *aPresShell, nsIContent *aContent, nsStyleContext* aContext); nsIFrame* NS_NewSVGPatternFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsStyleContext* aContext); nsIFrame* NS_NewSVGMaskFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsStyleContext* aContext); nsIFrame* NS_NewSVGLeafFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); #endif #include "nsIDocument.h" #include "nsIDOMElement.h" #include "nsIDOMNodeList.h" #include "nsIDOMDocument.h" #include "nsIDOMDocumentXBL.h" #include "nsIScrollable.h" #include "nsINodeInfo.h" #include "prenv.h" #include "nsWidgetsCID.h" #include "nsNodeInfoManager.h" #include "nsContentCreatorFunctions.h" #include "nsIServiceManager.h" // Global object maintenance nsIXBLService * nsCSSFrameConstructor::gXBLService = nsnull; // Global prefs static PRBool gGotXBLFormPrefs = PR_FALSE; static PRBool gUseXBLForms = PR_FALSE; #ifdef DEBUG // Set the environment variable GECKO_FRAMECTOR_DEBUG_FLAGS to one or // more of the following flags (comma separated) for handy debug // output. static PRBool gNoisyContentUpdates = PR_FALSE; static PRBool gReallyNoisyContentUpdates = PR_FALSE; static PRBool gNoisyInlineConstruction = PR_FALSE; static PRBool gVerifyFastFindFrame = PR_FALSE; static PRBool gTablePseudoFrame = PR_FALSE; struct FrameCtorDebugFlags { const char* name; PRBool* on; }; static FrameCtorDebugFlags gFlags[] = { { "content-updates", &gNoisyContentUpdates }, { "really-noisy-content-updates", &gReallyNoisyContentUpdates }, { "noisy-inline", &gNoisyInlineConstruction }, { "fast-find-frame", &gVerifyFastFindFrame }, { "table-pseudo", &gTablePseudoFrame }, }; #define NUM_DEBUG_FLAGS (sizeof(gFlags) / sizeof(gFlags[0])) #endif #ifdef MOZ_XUL #include "nsMenuFrame.h" #include "nsPopupSetFrame.h" #include "nsTreeColFrame.h" #include "nsIBoxObject.h" #include "nsPIListBoxObject.h" #include "nsListBoxBodyFrame.h" #include "nsListItemFrame.h" //------------------------------------------------------------------ nsIFrame* NS_NewAutoRepeatBoxFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewRootBoxFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewDocElementBoxFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewThumbFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewDeckFrame (nsIPresShell* aPresShell, nsStyleContext* aContext, nsIBoxLayout* aLayoutManager = nsnull); nsIFrame* NS_NewLeafBoxFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewStackFrame (nsIPresShell* aPresShell, nsStyleContext* aContext, nsIBoxLayout* aLayoutManager = nsnull); nsIFrame* NS_NewProgressMeterFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewImageBoxFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewTextBoxFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewGroupBoxFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewButtonBoxFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSplitterFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewMenuPopupFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewPopupSetFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewMenuFrame (nsIPresShell* aPresShell, nsStyleContext* aContext, PRUint32 aFlags); nsIFrame* NS_NewMenuBarFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewTreeBodyFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); // grid nsresult NS_NewGridLayout2 ( nsIPresShell* aPresShell, nsIBoxLayout** aNewLayout ); nsresult NS_NewGridRowLeafLayout ( nsIPresShell* aPresShell, nsIBoxLayout** aNewLayout ); nsIFrame* NS_NewGridRowLeafFrame (nsIPresShell* aPresShell, nsStyleContext* aContext, PRBool aIsRoot, nsIBoxLayout* aLayout); nsresult NS_NewGridRowGroupLayout ( nsIPresShell* aPresShell, nsIBoxLayout** aNewLayout ); nsIFrame* NS_NewGridRowGroupFrame (nsIPresShell* aPresShell, nsStyleContext* aContext, PRBool aIsRoot, nsIBoxLayout* aLayout); nsresult NS_NewListBoxLayout ( nsIPresShell* aPresShell, nsCOMPtr& aNewLayout ); // end grid nsIFrame* NS_NewTitleBarFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewResizerFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); #endif nsIFrame* NS_NewHTMLScrollFrame (nsIPresShell* aPresShell, nsStyleContext* aContext, PRBool aIsRoot); nsIFrame* NS_NewXULScrollFrame (nsIPresShell* aPresShell, nsStyleContext* aContext, PRBool aIsRoot); nsIFrame* NS_NewSliderFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewScrollbarFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewScrollbarButtonFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); #ifdef NOISY_FINDFRAME static PRInt32 FFWC_totalCount=0; static PRInt32 FFWC_doLoop=0; static PRInt32 FFWC_doSibling=0; static PRInt32 FFWC_recursions=0; static PRInt32 FFWC_nextInFlows=0; static PRInt32 FFWC_slowSearchForText=0; #endif static nsresult DeletingFrameSubtree(nsFrameManager* aFrameManager, nsIFrame* aFrame); #ifdef MOZ_SVG static nsIFrame * SVG_GetFirstNonAAncestorFrame(nsIFrame *aParentFrame) { for (nsIFrame *ancestorFrame = aParentFrame; ancestorFrame != nsnull; ancestorFrame = ancestorFrame->GetParent()) { if (ancestorFrame->GetType() != nsGkAtoms::svgAFrame) { return ancestorFrame; } } return nsnull; } // Test to see if this language is supported static PRBool SVG_TestLanguage(const nsSubstring& lstr, const nsSubstring& prefs) { // Compare list to attribute value, which may be a list // According to the SVG 1.1 Spec (at least as I read it), we should take // the first attribute value and check it for any matches in the users // preferences, including any prefix matches. // This algorithm is O(M*N) PRInt32 vbegin = 0; PRInt32 vlen = lstr.Length(); while (vbegin < vlen) { PRInt32 vend = lstr.FindChar(PRUnichar(','), vbegin); if (vend == kNotFound) { vend = vlen; } PRInt32 gbegin = 0; PRInt32 glen = prefs.Length(); while (gbegin < glen) { PRInt32 gend = prefs.FindChar(PRUnichar(','), gbegin); if (gend == kNotFound) { gend = glen; } const nsDefaultStringComparator defaultComparator; const nsStringComparator& comparator = static_cast(defaultComparator); if (nsStyleUtil::DashMatchCompare(Substring(lstr, vbegin, vend-vbegin), Substring(prefs, gbegin, gend-gbegin), comparator)) { return PR_TRUE; } gbegin = gend + 1; } vbegin = vend + 1; } return PR_FALSE; } #endif static inline nsIFrame* GetFieldSetAreaFrame(nsIFrame* aFieldsetFrame) { // Depends on the fieldset child frame order - see ConstructFieldSetFrame() below. nsIFrame* firstChild = aFieldsetFrame->GetFirstChild(nsnull); return firstChild && firstChild->GetNextSibling() ? firstChild->GetNextSibling() : firstChild; } //---------------------------------------------------------------------- static PRBool IsInlineOutside(nsIFrame* aFrame) { return aFrame->GetStyleDisplay()->IsInlineOutside(); } /** * True if aFrame is an actual inline frame in the sense of non-replaced * display:inline CSS boxes. In other words, it can be affected by {ib} * splitting and can contain first-letter frames. Basically, this is either an * inline frame (positioned or otherwise) or an line frame (this last because * it can contain first-letter and because inserting blocks in the middle of it * needs to terminate it). */ static PRBool IsInlineFrame(const nsIFrame* aFrame) { return aFrame->IsFrameOfType(nsIFrame::eLineParticipant); } /** * If any children require a block parent, return the first such child. * Otherwise return null. */ static nsIContent* AnyKidsNeedBlockParent(nsIFrame *aFrameList) { for (nsIFrame *k = aFrameList; k; k = k->GetNextSibling()) { // Line participants, such as text and inline frames, can't be // directly inside a XUL box; they must be wrapped in an // intermediate block. if (k->IsFrameOfType(nsIFrame::eLineParticipant)) { return k->GetContent(); } } return nsnull; } // Reparent a frame into a wrapper frame that is a child of its old parent. static void ReparentFrame(nsFrameManager* aFrameManager, nsIFrame* aNewParentFrame, nsIFrame* aFrame) { aFrame->SetParent(aNewParentFrame); aFrameManager->ReParentStyleContext(aFrame); if (aFrame->GetStateBits() & (NS_FRAME_HAS_VIEW | NS_FRAME_HAS_CHILD_WITH_VIEW)) { // No need to walk up the tree, since the bits are already set // right on the parent of aNewParentFrame. NS_ASSERTION(aNewParentFrame->GetParent()->GetStateBits() & NS_FRAME_HAS_CHILD_WITH_VIEW, "aNewParentFrame's parent should have this bit set!"); aNewParentFrame->AddStateBits(NS_FRAME_HAS_CHILD_WITH_VIEW); } } //---------------------------------------------------------------------- // // When inline frames get weird and have block frames in them, we // annotate them to help us respond to incremental content changes // more easily. static inline PRBool IsFrameSpecial(nsIFrame* aFrame) { return (aFrame->GetStateBits() & NS_FRAME_IS_SPECIAL) != 0; } static nsIFrame* GetSpecialSibling(nsIFrame* aFrame) { // We only store the "special sibling" annotation with the first // frame in the continuation chain. Walk back to find that frame now. aFrame = aFrame->GetFirstContinuation(); void* value = aFrame->GetProperty(nsGkAtoms::IBSplitSpecialSibling); return static_cast(value); } static nsIFrame* GetIBSplitSpecialPrevSibling(nsIFrame* aFrame) { NS_PRECONDITION(IsFrameSpecial(aFrame) && !IsInlineFrame(aFrame), "Shouldn't call this"); // We only store the "special sibling" annotation with the first // frame in the continuation chain. Walk back to find that frame now. return static_cast (aFrame->GetFirstContinuation()-> GetProperty(nsGkAtoms::IBSplitSpecialPrevSibling)); } static nsIFrame* GetLastSpecialSibling(nsIFrame* aFrame) { for (nsIFrame *frame = aFrame, *next; ; frame = next) { next = GetSpecialSibling(frame); if (!next) return frame; } NS_NOTREACHED("unreachable code"); return nsnull; } static void SetFrameIsSpecial(nsIFrame* aFrame, nsIFrame* aSpecialSibling) { NS_PRECONDITION(aFrame, "bad args!"); // Mark the frame and all of its siblings as "special". for (nsIFrame* frame = aFrame; frame != nsnull; frame = frame->GetNextContinuation()) { frame->AddStateBits(NS_FRAME_IS_SPECIAL); } if (aSpecialSibling) { // We should be the first-in-flow NS_ASSERTION(!aFrame->GetPrevInFlow(), "assigning special sibling to other than first-in-flow!"); // Store the "special sibling" (if we were given one) with the // first frame in the flow. aFrame->SetProperty(nsGkAtoms::IBSplitSpecialSibling, aSpecialSibling); } } static nsIFrame* GetIBContainingBlockFor(nsIFrame* aFrame) { NS_PRECONDITION(IsFrameSpecial(aFrame), "GetIBContainingBlockFor() should only be called on known IB frames"); // Get the first "normal" ancestor of the target frame. nsIFrame* parentFrame; do { parentFrame = aFrame->GetParent(); if (! parentFrame) { NS_ERROR("no unsplit block frame in IB hierarchy"); return aFrame; } // Note that we ignore non-special frames which have a pseudo on their // style context -- they're not the frames we're looking for! In // particular, they may be hiding a real parent that _is_ special. if (!IsFrameSpecial(parentFrame) && !parentFrame->GetStyleContext()->GetPseudoType()) break; aFrame = parentFrame; } while (1); // post-conditions NS_ASSERTION(parentFrame, "no normal ancestor found for special frame in GetIBContainingBlockFor"); NS_ASSERTION(parentFrame != aFrame, "parentFrame is actually the child frame - bogus reslt"); return parentFrame; } //---------------------------------------------------------------------- // Block/inline frame construction logic. We maintain a few invariants here: // // 1. Block frames contain block and inline frames. // // 2. Inline frames only contain inline frames. If an inline parent has a block // child then the block child is migrated upward until it lands in a block // parent (the inline frames containing block is where it will end up). static nsIFrame* FindFirstBlock(nsIFrame* aKid, nsIFrame** aPrevKid) { nsIFrame* prevKid = nsnull; while (aKid) { if (!IsInlineOutside(aKid)) { *aPrevKid = prevKid; return aKid; } prevKid = aKid; aKid = aKid->GetNextSibling(); } *aPrevKid = nsnull; return nsnull; } static nsIFrame* FindLastBlock(nsIFrame* aKid) { nsIFrame* lastBlock = nsnull; while (aKid) { if (!IsInlineOutside(aKid)) { lastBlock = aKid; } aKid = aKid->GetNextSibling(); } return lastBlock; } /* * Unlike the special (next) sibling, the special previous sibling * property points only from the anonymous block to the original * inline that preceded it. DO NOT CHANGE THAT -- the * GetParentStyleContextFrame code depends on it! It is useful for * finding the "special parent" of a frame (i.e., a frame from which a * good parent style context can be obtained), one looks at the * special previous sibling annotation of the real parent of the frame * (if the real parent has NS_FRAME_IS_SPECIAL). */ inline void MarkIBSpecialPrevSibling(nsIFrame *aAnonymousFrame, nsIFrame *aSpecialParent) { aAnonymousFrame->SetProperty(nsGkAtoms::IBSplitSpecialPrevSibling, aSpecialParent, nsnull, nsnull); } // ----------------------------------------------------------- static PRBool IsOutOfFlowList(nsIAtom* aListName) { return aListName == nsGkAtoms::floatList || aListName == nsGkAtoms::absoluteList || aListName == nsGkAtoms::overflowOutOfFlowList || aListName == nsGkAtoms::fixedList; } // Helper function that recursively removes content to frame mappings and // undisplayed content mappings. // This differs from DeletingFrameSubtree() because the frames have not yet been // added to the frame hierarchy. // XXXbz it would really help if we merged the two methods somehow... :( static void DoCleanupFrameReferences(nsFrameManager* aFrameManager, nsIFrame* aFrameIn) { nsIContent* content = aFrameIn->GetContent(); if (aFrameIn->GetType() == nsGkAtoms::placeholderFrame) { nsPlaceholderFrame* placeholder = static_cast (aFrameIn); // if the frame is a placeholder use the out of flow frame aFrameIn = nsPlaceholderFrame::GetRealFrameForPlaceholder(placeholder); // And don't forget to unregister the placeholder mapping. Note that this // means it's the caller's responsibility to actually destroy the // out-of-flow pointed to by the placeholder, since after this point the // out-of-flow is not reachable via the placeholder. aFrameManager->UnregisterPlaceholderFrame(placeholder); } // Remove the mapping from the content object to its frame aFrameManager->RemoveAsPrimaryFrame(content, aFrameIn); aFrameManager->ClearAllUndisplayedContentIn(content); // Recursively walk the child frames. nsIAtom* childListName = nsnull; PRInt32 childListIndex = 0; do { nsIFrame* childFrame = aFrameIn->GetFirstChild(childListName); while (childFrame) { DoCleanupFrameReferences(aFrameManager, childFrame); // Get the next sibling child frame childFrame = childFrame->GetNextSibling(); } childListName = aFrameIn->GetAdditionalChildListName(childListIndex++); } while (childListName); } // Helper function that walks a frame list and calls DoCleanupFrameReference() static void CleanupFrameReferences(nsFrameManager* aFrameManager, nsIFrame* aFrameList) { while (aFrameList) { DoCleanupFrameReferences(aFrameManager, aFrameList); // Get the sibling frame aFrameList = aFrameList->GetNextSibling(); } } // ----------------------------------------------------------- // Structure used when constructing formatting object trees. struct nsFrameItems { nsIFrame* childList; nsIFrame* lastChild; nsFrameItems(nsIFrame* aFrame = nsnull); // Appends the frame to the end of the list void AddChild(nsIFrame* aChild); // Inserts the frame somewhere in the list void InsertChildAfter(nsIFrame* aChild, nsIFrame* aAfter); // Remove the frame from the list, return PR_FALSE if not found. If // aPrevSibling is given, it must have aChild as its GetNextSibling(). // aPrevSibling may be null to indicate that the list should be searched. PRBool RemoveChild(nsIFrame* aChild, nsIFrame* aPrevSibling); }; nsFrameItems::nsFrameItems(nsIFrame* aFrame) : childList(aFrame), lastChild(aFrame) { } void nsFrameItems::AddChild(nsIFrame* aChild) { #ifdef DEBUG nsIFrame* oldLastChild = lastChild; #endif if (childList == nsnull) { childList = lastChild = aChild; } else { NS_ASSERTION(aChild != lastChild, "Same frame being added to frame list twice?"); lastChild->SetNextSibling(aChild); lastChild = aChild; } // if aChild has siblings, lastChild needs to be the last one for (nsIFrame* sib = lastChild->GetNextSibling(); sib; sib = sib->GetNextSibling()) { NS_ASSERTION(oldLastChild != sib, "Loop in frame list"); lastChild = sib; } } void nsFrameItems::InsertChildAfter(nsIFrame* aChild, nsIFrame* aAfter) { if (!childList || (aAfter && !aAfter->GetNextSibling())) { // Appending to the end of the list AddChild(aChild); return; } if (!aAfter) { // Inserting at beginning of list aChild->SetNextSibling(childList); childList = aChild; return; } aChild->SetNextSibling(aAfter->GetNextSibling()); aAfter->SetNextSibling(aChild); } PRBool nsFrameItems::RemoveChild(nsIFrame* aFrame, nsIFrame* aPrevSibling) { NS_PRECONDITION(aFrame, "null ptr"); nsIFrame* prev; if (aPrevSibling) { prev = aPrevSibling; } else { prev = nsnull; nsIFrame* sib; for (sib = childList; sib && sib != aFrame; sib = sib->GetNextSibling()) { prev = sib; } if (!sib) { return PR_FALSE; } } NS_ASSERTION(!prev || prev->GetNextSibling() == aFrame, "Unexpected prevsibling"); if (aFrame == childList) { childList = aFrame->GetNextSibling(); } else { prev->SetNextSibling(aFrame->GetNextSibling()); } if (aFrame == lastChild) { lastChild = prev; } aFrame->SetNextSibling(nsnull); return PR_TRUE; } // ----------------------------------------------------------- // Structure used when constructing formatting object trees. Contains // state information needed for absolutely positioned elements struct nsAbsoluteItems : nsFrameItems { // containing block for absolutely positioned elements nsIFrame* containingBlock; nsAbsoluteItems(nsIFrame* aContainingBlock); #ifdef DEBUG // XXXbz Does this need a debug-only assignment operator that nulls out the // childList in the nsAbsoluteItems we're copying? Introducing a difference // between debug and non-debug behavior seems bad, so I guess not... ~nsAbsoluteItems() { NS_ASSERTION(!childList, "Dangling child list. Someone forgot to insert it?"); } #endif // Appends the frame to the end of the list void AddChild(nsIFrame* aChild); }; nsAbsoluteItems::nsAbsoluteItems(nsIFrame* aContainingBlock) : containingBlock(aContainingBlock) { } // Additional behavior is that it sets the frame's NS_FRAME_OUT_OF_FLOW flag void nsAbsoluteItems::AddChild(nsIFrame* aChild) { NS_ASSERTION(aChild->PresContext()->FrameManager()-> GetPlaceholderFrameFor(aChild), "Child without placeholder being added to nsAbsoluteItems?"); aChild->AddStateBits(NS_FRAME_OUT_OF_FLOW); nsFrameItems::AddChild(aChild); } // Structures used to record the creation of pseudo table frames where // the content belongs to some ancestor. // PseudoFrames are necessary when the childframe cannot be the direct // ancestor of the content based parent frame. The amount of necessary pseudo // frames is limited as the worst case would be table frame nested directly // into another table frame. So the member structures of nsPseudoFrames can be // viewed as a ring buffer where you start with the necessary frame type and // add higher frames as long as necessary to fit into the initial parent frame. // mLowestType is some sort of stack pointer which shows the start of the // ringbuffer. The insertion of pseudo frames can happen between every // two frames so we need to push and pop the pseudo frame data when children // of a frame are created. // The colgroup frame is special as it can harbour only col children. // Once all children of given frame are known, the pseudo frames can be // processed that means attached to the corresponding parent frames. // The behaviour is in general described at // http://www.w3.org/TR/CSS21/tables.html#anonymous-boxes // however there are implementation details that extend the CSS 2.1 // specification: // 1. every table frame is wrapped in an outer table frame, which is always a // pseudo frame. // 2. the outer table frame will be also created to hold a caption. // 3. each table cell will have a pseudo inner table cell frame. // 4. a colgroup frame is created between a column and a table // 5. a rowgroup frame is created between a row and a table // A table frame can only have rowgroups or column groups as children. // A outer table frame can only have one caption and one table frame // as children. // Every table even if all table frames are specified will require the // creation of two types of pseudo frames: the outer table frame and the inner // table cell frames. struct nsPseudoFrameData { nsIFrame* mFrame; // created pseudo frame nsFrameItems mChildList; // child frames pending to be added to the pseudo nsFrameItems mChildList2; // child frames pending to be added to the pseudo nsPseudoFrameData(); nsPseudoFrameData(nsPseudoFrameData& aOther); void Reset(); #ifdef DEBUG void Dump(); #endif }; struct nsPseudoFrames { nsPseudoFrameData mTableOuter; nsPseudoFrameData mTableInner; nsPseudoFrameData mRowGroup; nsPseudoFrameData mColGroup; nsPseudoFrameData mRow; nsPseudoFrameData mCellOuter; nsPseudoFrameData mCellInner; // the frame type of the most descendant pseudo frame, no AddRef nsIAtom* mLowestType; nsPseudoFrames(); nsPseudoFrames& operator=(const nsPseudoFrames& aOther); void Reset(nsPseudoFrames* aSave = nsnull); PRBool IsEmpty() { return (!mLowestType && !mColGroup.mFrame); } #ifdef DEBUG void Dump(); #endif }; nsPseudoFrameData::nsPseudoFrameData() : mFrame(nsnull), mChildList(), mChildList2() {} nsPseudoFrameData::nsPseudoFrameData(nsPseudoFrameData& aOther) : mFrame(aOther.mFrame), mChildList(aOther.mChildList), mChildList2(aOther.mChildList2) {} void nsPseudoFrameData::Reset() { mFrame = nsnull; mChildList.childList = mChildList.lastChild = nsnull; mChildList2.childList = mChildList2.lastChild = nsnull; } #ifdef DEBUG void nsPseudoFrameData::Dump() { nsIFrame* main = nsnull; nsIFrame* second = nsnull; printf(" %p\n", static_cast(mFrame)); main = mChildList.childList; second = mChildList2.childList; while (main || second) { printf(" %p %p\n", static_cast(main), static_cast(second)); if (main) main = main->GetNextSibling(); if (second) second = second->GetNextSibling(); } } #endif nsPseudoFrames::nsPseudoFrames() : mTableOuter(), mTableInner(), mRowGroup(), mColGroup(), mRow(), mCellOuter(), mCellInner(), mLowestType(nsnull) {} nsPseudoFrames& nsPseudoFrames::operator=(const nsPseudoFrames& aOther) { mTableOuter = aOther.mTableOuter; mTableInner = aOther.mTableInner; mColGroup = aOther.mColGroup; mRowGroup = aOther.mRowGroup; mRow = aOther.mRow; mCellOuter = aOther.mCellOuter; mCellInner = aOther.mCellInner; mLowestType = aOther.mLowestType; return *this; } void nsPseudoFrames::Reset(nsPseudoFrames* aSave) { if (aSave) { *aSave = *this; } mTableOuter.Reset(); mTableInner.Reset(); mColGroup.Reset(); mRowGroup.Reset(); mRow.Reset(); mCellOuter.Reset(); mCellInner.Reset(); mLowestType = nsnull; } #ifdef DEBUG void nsPseudoFrames::Dump() { if (IsEmpty()) { // check that it is really empty, warn otherwise NS_ASSERTION(!mTableOuter.mFrame, "Pseudo Outer Table Frame not empty"); NS_ASSERTION(!mTableOuter.mChildList.childList, "Pseudo Outer Table Frame has primary children"); NS_ASSERTION(!mTableOuter.mChildList2.childList,"Pseudo Outer Table Frame has secondary children"); NS_ASSERTION(!mTableInner.mFrame, "Pseudo Inner Table Frame not empty"); NS_ASSERTION(!mTableInner.mChildList.childList, "Pseudo Inner Table Frame has primary children"); NS_ASSERTION(!mTableInner.mChildList2.childList,"Pseudo Inner Table Frame has secondary children"); NS_ASSERTION(!mColGroup.mFrame, "Pseudo Colgroup Frame not empty"); NS_ASSERTION(!mColGroup.mChildList.childList, "Pseudo Colgroup Table Frame has primary children"); NS_ASSERTION(!mColGroup.mChildList2.childList, "Pseudo Colgroup Table Frame has secondary children"); NS_ASSERTION(!mRowGroup.mFrame, "Pseudo Rowgroup Frame not empty"); NS_ASSERTION(!mRowGroup.mChildList.childList, "Pseudo Rowgroup Frame has primary children"); NS_ASSERTION(!mRowGroup.mChildList2.childList, "Pseudo Rowgroup Frame has secondary children"); NS_ASSERTION(!mRow.mFrame, "Pseudo Row Frame not empty"); NS_ASSERTION(!mRow.mChildList.childList, "Pseudo Row Frame has primary children"); NS_ASSERTION(!mRow.mChildList2.childList, "Pseudo Row Frame has secondary children"); NS_ASSERTION(!mCellOuter.mFrame, "Pseudo Outer Cell Frame not empty"); NS_ASSERTION(!mCellOuter.mChildList.childList, "Pseudo Outer Cell Frame has primary children"); NS_ASSERTION(!mCellOuter.mChildList2.childList, "Pseudo Outer Cell Frame has secondary children"); NS_ASSERTION(!mCellInner.mFrame, "Pseudo Inner Cell Frame not empty"); NS_ASSERTION(!mCellInner.mChildList.childList, "Pseudo Inner Cell Frame has primary children"); NS_ASSERTION(!mCellInner.mChildList2.childList, "Pseudo inner Cell Frame has secondary children"); } else { if (mTableOuter.mFrame || mTableOuter.mChildList.childList || mTableOuter.mChildList2.childList) { if (nsGkAtoms::tableOuterFrame == mLowestType) { printf("LOW OuterTable\n"); } else { printf(" OuterTable\n"); } mTableOuter.Dump(); } if (mTableInner.mFrame || mTableInner.mChildList.childList || mTableInner.mChildList2.childList) { if (nsGkAtoms::tableFrame == mLowestType) { printf("LOW InnerTable\n"); } else { printf(" InnerTable\n"); } mTableInner.Dump(); } if (mColGroup.mFrame || mColGroup.mChildList.childList || mColGroup.mChildList2.childList) { if (nsGkAtoms::tableColGroupFrame == mLowestType) { printf("LOW ColGroup\n"); } else { printf(" ColGroup\n"); } mColGroup.Dump(); } if (mRowGroup.mFrame || mRowGroup.mChildList.childList || mRowGroup.mChildList2.childList) { if (nsGkAtoms::tableRowGroupFrame == mLowestType) { printf("LOW RowGroup\n"); } else { printf(" RowGroup\n"); } mRowGroup.Dump(); } if (mRow.mFrame || mRow.mChildList.childList || mRow.mChildList2.childList) { if (nsGkAtoms::tableRowFrame == mLowestType) { printf("LOW Row\n"); } else { printf(" Row\n"); } mRow.Dump(); } if (mCellOuter.mFrame || mCellOuter.mChildList.childList || mCellOuter.mChildList2.childList) { if (IS_TABLE_CELL(mLowestType)) { printf("LOW OuterCell\n"); } else { printf(" OuterCell\n"); } mCellOuter.Dump(); } if (mCellInner.mFrame || mCellInner.mChildList.childList || mCellInner.mChildList2.childList) { printf(" InnerCell\n"); mCellInner.Dump(); } } } #endif // ----------------------------------------------------------- // Structure for saving the existing state when pushing/poping containing // blocks. The destructor restores the state to its previous state class nsFrameConstructorSaveState { public: nsFrameConstructorSaveState(); ~nsFrameConstructorSaveState(); private: nsAbsoluteItems* mItems; // pointer to struct whose data we save/restore PRBool* mFirstLetterStyle; PRBool* mFirstLineStyle; nsAbsoluteItems mSavedItems; // copy of original data PRBool mSavedFirstLetterStyle; PRBool mSavedFirstLineStyle; // The name of the child list in which our frames would belong nsIAtom* mChildListName; nsFrameConstructorState* mState; friend class nsFrameConstructorState; }; // Structure used for maintaining state information during the // frame construction process class nsFrameConstructorState { public: nsPresContext *mPresContext; nsIPresShell *mPresShell; nsFrameManager *mFrameManager; #ifdef MOZ_XUL // The root box, if any. nsIRootBox* mRootBox; // Frames destined for the nsGkAtoms::popupList. nsAbsoluteItems mPopupItems; #endif // Containing block information for out-of-flow frames. nsAbsoluteItems mFixedItems; nsAbsoluteItems mAbsoluteItems; nsAbsoluteItems mFloatedItems; PRBool mFirstLetterStyle; PRBool mFirstLineStyle; nsCOMPtr mFrameState; nsPseudoFrames mPseudoFrames; // Constructor // Use the passed-in history state. nsFrameConstructorState(nsIPresShell* aPresShell, nsIFrame* aFixedContainingBlock, nsIFrame* aAbsoluteContainingBlock, nsIFrame* aFloatContainingBlock, nsILayoutHistoryState* aHistoryState); // Get the history state from the pres context's pres shell. nsFrameConstructorState(nsIPresShell* aPresShell, nsIFrame* aFixedContainingBlock, nsIFrame* aAbsoluteContainingBlock, nsIFrame* aFloatContainingBlock); ~nsFrameConstructorState(); // Function to push the existing absolute containing block state and // create a new scope. Code that uses this function should get matching // logic in GetAbsoluteContainingBlock. void PushAbsoluteContainingBlock(nsIFrame* aNewAbsoluteContainingBlock, nsFrameConstructorSaveState& aSaveState); // Function to push the existing float containing block state and // create a new scope. Code that uses this function should get matching // logic in GetFloatContainingBlock. // Pushing a null float containing block forbids any frames from being // floated until a new float containing block is pushed. // XXX we should get rid of null float containing blocks and teach the // various frame classes to deal with floats instead. void PushFloatContainingBlock(nsIFrame* aNewFloatContainingBlock, nsFrameConstructorSaveState& aSaveState, PRBool aFirstLetterStyle, PRBool aFirstLineStyle); // Function to return the proper geometric parent for a frame with display // struct given by aStyleDisplay and parent's frame given by // aContentParentFrame. If the frame is not allowed to be positioned, pass // false for aCanBePositioned. nsIFrame* GetGeometricParent(const nsStyleDisplay* aStyleDisplay, nsIFrame* aContentParentFrame); /** * Function to add a new frame to the right frame list. This MUST be called * on frames before their children have been processed if the frames might * conceivably be out-of-flow; otherwise cleanup in error cases won't work * right. Also, this MUST be called on frames after they have been * initialized. * @param aNewFrame the frame to add * @param aFrameItems the list to add in-flow frames to * @param aContent the content pointer for aNewFrame * @param aStyleContext the style context resolved for aContent * @param aParentFrame the parent frame for the content if it were in-flow * @param aCanBePositioned pass false if the frame isn't allowed to be * positioned * @param aCanBeFloated pass false if the frame isn't allowed to be * floated * @param aIsOutOfFlowPopup pass true if the frame is an out-of-flow popup * (XUL-only) * @throws NS_ERROR_OUT_OF_MEMORY if it happens. * @note If this method throws, that means that aNewFrame was not inserted * into any frame lists. Furthermore, this method will handle cleanup * of aNewFrame (via calling CleanupFrameReferences() and Destroy() on * it). */ nsresult AddChild(nsIFrame* aNewFrame, nsFrameItems& aFrameItems, nsIContent* aContent, nsStyleContext* aStyleContext, nsIFrame* aParentFrame, PRBool aCanBePositioned = PR_TRUE, PRBool aCanBeFloated = PR_TRUE, PRBool aIsOutOfFlowPopup = PR_FALSE, PRBool aInsertAfter = PR_FALSE, nsIFrame* aInsertAfterFrame = nsnull); protected: friend class nsFrameConstructorSaveState; /** * ProcessFrameInsertions takes the frames in aFrameItems and adds them as * kids to the aChildListName child list of |aFrameItems.containingBlock|. */ void ProcessFrameInsertions(nsAbsoluteItems& aFrameItems, nsIAtom* aChildListName); }; nsFrameConstructorState::nsFrameConstructorState(nsIPresShell* aPresShell, nsIFrame* aFixedContainingBlock, nsIFrame* aAbsoluteContainingBlock, nsIFrame* aFloatContainingBlock, nsILayoutHistoryState* aHistoryState) : mPresContext(aPresShell->GetPresContext()), mPresShell(aPresShell), mFrameManager(aPresShell->FrameManager()), #ifdef MOZ_XUL mRootBox(nsIRootBox::GetRootBox(aPresShell)), mPopupItems(mRootBox ? mRootBox->GetPopupSetFrame() : nsnull), #endif mFixedItems(aFixedContainingBlock), mAbsoluteItems(aAbsoluteContainingBlock), mFloatedItems(aFloatContainingBlock), mFirstLetterStyle(PR_FALSE), mFirstLineStyle(PR_FALSE), mFrameState(aHistoryState), mPseudoFrames() { MOZ_COUNT_CTOR(nsFrameConstructorState); } nsFrameConstructorState::nsFrameConstructorState(nsIPresShell* aPresShell, nsIFrame* aFixedContainingBlock, nsIFrame* aAbsoluteContainingBlock, nsIFrame* aFloatContainingBlock) : mPresContext(aPresShell->GetPresContext()), mPresShell(aPresShell), mFrameManager(aPresShell->FrameManager()), #ifdef MOZ_XUL mRootBox(nsIRootBox::GetRootBox(aPresShell)), mPopupItems(mRootBox ? mRootBox->GetPopupSetFrame() : nsnull), #endif mFixedItems(aFixedContainingBlock), mAbsoluteItems(aAbsoluteContainingBlock), mFloatedItems(aFloatContainingBlock), mFirstLetterStyle(PR_FALSE), mFirstLineStyle(PR_FALSE), mPseudoFrames() { MOZ_COUNT_CTOR(nsFrameConstructorState); mFrameState = aPresShell->GetDocument()->GetLayoutHistoryState(); } nsFrameConstructorState::~nsFrameConstructorState() { // Frame order comparison functions only work properly when the placeholders // have been inserted into the frame tree. So for example if we have a new float // containing the placeholder for a new abs-pos frame, and we process the abs-pos // insertion first, then we won't be able to find the right place to insert in // in the abs-pos list. So put floats in first, because they can contain placeholders // for abs-pos and fixed-pos items whose containing blocks are outside the floats. // Then put abs-pos frames in, because they can contain placeholders for fixed-pos // items whose containing block is outside the abs-pos frames. MOZ_COUNT_DTOR(nsFrameConstructorState); ProcessFrameInsertions(mFloatedItems, nsGkAtoms::floatList); ProcessFrameInsertions(mAbsoluteItems, nsGkAtoms::absoluteList); ProcessFrameInsertions(mFixedItems, nsGkAtoms::fixedList); #ifdef MOZ_XUL ProcessFrameInsertions(mPopupItems, nsGkAtoms::popupList); #endif } static nsIFrame* AdjustAbsoluteContainingBlock(nsIFrame* aContainingBlockIn) { if (!aContainingBlockIn) { return nsnull; } // Always use the container's first continuation. (Inline frames can have // non-fluid bidi continuations...) return aContainingBlockIn->GetFirstContinuation(); } void nsFrameConstructorState::PushAbsoluteContainingBlock(nsIFrame* aNewAbsoluteContainingBlock, nsFrameConstructorSaveState& aSaveState) { aSaveState.mItems = &mAbsoluteItems; aSaveState.mSavedItems = mAbsoluteItems; aSaveState.mChildListName = nsGkAtoms::absoluteList; aSaveState.mState = this; mAbsoluteItems = nsAbsoluteItems(AdjustAbsoluteContainingBlock(aNewAbsoluteContainingBlock)); } void nsFrameConstructorState::PushFloatContainingBlock(nsIFrame* aNewFloatContainingBlock, nsFrameConstructorSaveState& aSaveState, PRBool aFirstLetterStyle, PRBool aFirstLineStyle) { // XXXbz we should probably just be able to assert that // aNewFloatContainingBlock is a float containing block... see XXX comment at // the top of ProcessChildren. NS_PRECONDITION(!aNewFloatContainingBlock || aNewFloatContainingBlock->GetContentInsertionFrame()-> IsFloatContainingBlock(), "Please push a real float containing block!"); aSaveState.mItems = &mFloatedItems; aSaveState.mFirstLetterStyle = &mFirstLetterStyle; aSaveState.mFirstLineStyle = &mFirstLineStyle; aSaveState.mSavedItems = mFloatedItems; aSaveState.mSavedFirstLetterStyle = mFirstLetterStyle; aSaveState.mSavedFirstLineStyle = mFirstLineStyle; aSaveState.mChildListName = nsGkAtoms::floatList; aSaveState.mState = this; mFloatedItems = nsAbsoluteItems(aNewFloatContainingBlock); mFirstLetterStyle = aFirstLetterStyle; mFirstLineStyle = aFirstLineStyle; } nsIFrame* nsFrameConstructorState::GetGeometricParent(const nsStyleDisplay* aStyleDisplay, nsIFrame* aContentParentFrame) { NS_PRECONDITION(aStyleDisplay, "Must have display struct!"); // If there is no container for a fixed, absolute, or floating root // frame, we will ignore the positioning. This hack is originally // brought to you by the letter T: tables, since other roots don't // even call into this code. See bug 178855. // // XXX Disabling positioning in this case is a hack. If one was so inclined, // one could support this either by (1) inserting a dummy block between the // table and the canvas or (2) teaching the canvas how to reflow positioned // elements. (1) has the usual problems when multiple frames share the same // content (notice all the special cases in this file dealing with inner // tables and outer tables which share the same content). (2) requires some // work and possible factoring. // // XXXbz couldn't we just force position to "static" on roots and // float to "none"? That's OK per CSS 2.1, as far as I can tell. if (aStyleDisplay->IsFloating() && mFloatedItems.containingBlock) { NS_ASSERTION(!aStyleDisplay->IsAbsolutelyPositioned(), "Absolutely positioned _and_ floating?"); return mFloatedItems.containingBlock; } if (aStyleDisplay->mPosition == NS_STYLE_POSITION_ABSOLUTE && mAbsoluteItems.containingBlock) { return mAbsoluteItems.containingBlock; } if (aStyleDisplay->mPosition == NS_STYLE_POSITION_FIXED && mFixedItems.containingBlock) { return mFixedItems.containingBlock; } return aContentParentFrame; } nsresult nsFrameConstructorState::AddChild(nsIFrame* aNewFrame, nsFrameItems& aFrameItems, nsIContent* aContent, nsStyleContext* aStyleContext, nsIFrame* aParentFrame, PRBool aCanBePositioned, PRBool aCanBeFloated, PRBool aIsOutOfFlowPopup, PRBool aInsertAfter, nsIFrame* aInsertAfterFrame) { const nsStyleDisplay* disp = aNewFrame->GetStyleDisplay(); // The comments in GetGeometricParent regarding root table frames // all apply here, unfortunately. PRBool needPlaceholder = PR_FALSE; nsFrameItems* frameItems = &aFrameItems; #ifdef MOZ_XUL if (NS_UNLIKELY(aIsOutOfFlowPopup)) { NS_ASSERTION(aNewFrame->GetParent() == mPopupItems.containingBlock, "Popup whose parent is not the popup containing block?"); NS_ASSERTION(mPopupItems.containingBlock, "Must have a popup set frame!"); needPlaceholder = PR_TRUE; frameItems = &mPopupItems; } else #endif // MOZ_XUL if (aCanBeFloated && disp->IsFloating() && mFloatedItems.containingBlock) { NS_ASSERTION(aNewFrame->GetParent() == mFloatedItems.containingBlock, "Float whose parent is not the float containing block?"); needPlaceholder = PR_TRUE; frameItems = &mFloatedItems; } else if (aCanBePositioned) { if (disp->mPosition == NS_STYLE_POSITION_ABSOLUTE && mAbsoluteItems.containingBlock) { NS_ASSERTION(aNewFrame->GetParent() == mAbsoluteItems.containingBlock, "Abs pos whose parent is not the abs pos containing block?"); needPlaceholder = PR_TRUE; frameItems = &mAbsoluteItems; } if (disp->mPosition == NS_STYLE_POSITION_FIXED && mFixedItems.containingBlock) { NS_ASSERTION(aNewFrame->GetParent() == mFixedItems.containingBlock, "Fixed pos whose parent is not the fixed pos containing block?"); needPlaceholder = PR_TRUE; frameItems = &mFixedItems; } } if (needPlaceholder) { NS_ASSERTION(frameItems != &aFrameItems, "Putting frame in-flow _and_ want a placeholder?"); nsIFrame* placeholderFrame; nsresult rv = nsCSSFrameConstructor::CreatePlaceholderFrameFor(mPresShell, aContent, aNewFrame, aStyleContext, aParentFrame, nsnull, &placeholderFrame); if (NS_FAILED(rv)) { // Note that aNewFrame could be the top frame for a scrollframe setup, // hence already set as the primary frame. So we have to clean up here. // But it shouldn't have any out-of-flow kids. // XXXbz Maybe add a utility function to assert that? CleanupFrameReferences(mFrameManager, aNewFrame); aNewFrame->Destroy(); return rv; } // Add the placeholder frame to the flow aFrameItems.AddChild(placeholderFrame); } #ifdef DEBUG else { NS_ASSERTION(aNewFrame->GetParent() == aParentFrame, "In-flow frame has wrong parent"); } #endif if (aInsertAfter) { frameItems->InsertChildAfter(aNewFrame, aInsertAfterFrame); } else { frameItems->AddChild(aNewFrame); } // Now add the special siblings too. nsIFrame* specialSibling = aNewFrame; while (specialSibling && IsFrameSpecial(specialSibling)) { specialSibling = GetSpecialSibling(specialSibling); if (specialSibling) { NS_ASSERTION(frameItems == &aFrameItems, "IB split ending up in an out-of-flow childlist?"); frameItems->AddChild(specialSibling); } } return NS_OK; } void nsFrameConstructorState::ProcessFrameInsertions(nsAbsoluteItems& aFrameItems, nsIAtom* aChildListName) { #define NS_NONXUL_LIST_TEST (&aFrameItems == &mFloatedItems && \ aChildListName == nsGkAtoms::floatList) || \ (&aFrameItems == &mAbsoluteItems && \ aChildListName == nsGkAtoms::absoluteList) || \ (&aFrameItems == &mFixedItems && \ aChildListName == nsGkAtoms::fixedList) #ifdef MOZ_XUL NS_PRECONDITION(NS_NONXUL_LIST_TEST || (&aFrameItems == &mPopupItems && aChildListName == nsGkAtoms::popupList), "Unexpected aFrameItems/aChildListName combination"); #else NS_PRECONDITION(NS_NONXUL_LIST_TEST, "Unexpected aFrameItems/aChildListName combination"); #endif nsIFrame* firstNewFrame = aFrameItems.childList; if (!firstNewFrame) { return; } nsIFrame* containingBlock = aFrameItems.containingBlock; NS_ASSERTION(containingBlock, "Child list without containing block?"); // Insert the frames hanging out in aItems. We can use SetInitialChildList() // if the containing block hasn't been reflown yet (so NS_FRAME_FIRST_REFLOW // is set) and doesn't have any frames in the aChildListName child list yet. nsIFrame* firstChild = containingBlock->GetFirstChild(aChildListName); nsresult rv = NS_OK; if (!firstChild && (containingBlock->GetStateBits() & NS_FRAME_FIRST_REFLOW)) { rv = containingBlock->SetInitialChildList(aChildListName, firstNewFrame); } else { // Note that whether the frame construction context is doing an append or // not is not helpful here, since it could be appending to some frame in // the middle of the document, which means we're not necessarily // appending to the children of the containing block. // // We need to make sure the 'append to the end of document' case is fast. // So first test the last child of the containing block nsIFrame* lastChild = nsLayoutUtils::GetLastSibling(firstChild); // CompareTreePosition uses placeholder hierarchy for out of flow frames, // so this will make out-of-flows respect the ordering of placeholders, // which is great because it takes care of anonymous content. if (!lastChild || nsLayoutUtils::CompareTreePosition(lastChild, firstNewFrame, containingBlock) < 0) { // no lastChild, or lastChild comes before the new children, so just append rv = containingBlock->AppendFrames(aChildListName, firstNewFrame); } else { nsIFrame* insertionPoint = nsnull; // try the other children for (nsIFrame* f = firstChild; f != lastChild; f = f->GetNextSibling()) { PRInt32 compare = nsLayoutUtils::CompareTreePosition(f, firstNewFrame, containingBlock); if (compare > 0) { // f comes after the new children, so stop here and insert after // the previous frame break; } insertionPoint = f; } rv = containingBlock->InsertFrames(aChildListName, insertionPoint, firstNewFrame); } } aFrameItems.childList = nsnull; // XXXbz And if NS_FAILED(rv), what? I guess we need to clean up the list // and deal with all the placeholders... but what if the placeholders aren't // in the document yet? Could that happen? NS_ASSERTION(NS_SUCCEEDED(rv), "Frames getting lost!"); } nsFrameConstructorSaveState::nsFrameConstructorSaveState() : mItems(nsnull), mFirstLetterStyle(nsnull), mFirstLineStyle(nsnull), mSavedItems(nsnull), mSavedFirstLetterStyle(PR_FALSE), mSavedFirstLineStyle(PR_FALSE), mChildListName(nsnull), mState(nsnull) { } nsFrameConstructorSaveState::~nsFrameConstructorSaveState() { // Restore the state if (mItems) { NS_ASSERTION(mState, "Can't have mItems set without having a state!"); mState->ProcessFrameInsertions(*mItems, mChildListName); *mItems = mSavedItems; #ifdef DEBUG // We've transferred the child list, so drop the pointer we held to it. // Note that this only matters for the assert in ~nsAbsoluteItems. mSavedItems.childList = nsnull; #endif } if (mFirstLetterStyle) { *mFirstLetterStyle = mSavedFirstLetterStyle; } if (mFirstLineStyle) { *mFirstLineStyle = mSavedFirstLineStyle; } } static PRBool IsBorderCollapse(nsIFrame* aFrame) { for (nsIFrame* frame = aFrame; frame; frame = frame->GetParent()) { if (nsGkAtoms::tableFrame == frame->GetType()) { return ((nsTableFrame*)frame)->IsBorderCollapse(); } } NS_ASSERTION(PR_FALSE, "program error"); return PR_FALSE; } /** * Utility method, called from MoveChildrenTo(), that recursively * descends down the frame hierarchy looking for floating frames that * need parent pointer adjustments to account for the containment block * changes that could occur as the result of the reparenting done in * MoveChildrenTo(). */ static void AdjustFloatParentPtrs(nsIFrame* aFrame, nsFrameConstructorState& aState, nsFrameConstructorState& aOuterState) { NS_PRECONDITION(aFrame, "must have frame to work with"); nsIFrame *outOfFlowFrame = nsPlaceholderFrame::GetRealFrameFor(aFrame); if (outOfFlowFrame != aFrame) { if (outOfFlowFrame->GetStyleDisplay()->IsFloating()) { // Update the parent pointer for outOfFlowFrame since its // containing block has changed as the result of reparenting // and move it from the outer state to the inner, bug 307277. nsIFrame *parent = aState.mFloatedItems.containingBlock; NS_ASSERTION(parent, "Should have float containing block here!"); NS_ASSERTION(outOfFlowFrame->GetParent() == aOuterState.mFloatedItems.containingBlock, "expected the float to be a child of the outer CB"); if (aOuterState.mFloatedItems.RemoveChild(outOfFlowFrame, nsnull)) { aState.mFloatedItems.AddChild(outOfFlowFrame); } else { NS_NOTREACHED("float wasn't in the outer state float list"); } outOfFlowFrame->SetParent(parent); if (outOfFlowFrame->GetStateBits() & (NS_FRAME_HAS_VIEW | NS_FRAME_HAS_CHILD_WITH_VIEW)) { // We don't need to walk up the tree, since we're doing this // recursively. parent->AddStateBits(NS_FRAME_HAS_CHILD_WITH_VIEW); } } // All out-of-flows are automatically float containing blocks, so we're // done here. return; } if (aFrame->IsFloatContainingBlock()) { // No need to recurse further; floats whose placeholders are // inside a block already have the right parent. return; } // Dive down into children to see if any of their // placeholders need adjusting. nsIFrame *childFrame = aFrame->GetFirstChild(nsnull); while (childFrame) { // XXX_kin: Do we need to prevent descent into anonymous content here? AdjustFloatParentPtrs(childFrame, aState, aOuterState); childFrame = childFrame->GetNextSibling(); } } /** * Moves frames to a new parent, updating the style context and propagating * relevant frame state bits. |aState| may be null, in which case the parent * pointers of out-of-flow frames will remain untouched. */ static void MoveChildrenTo(nsFrameManager* aFrameManager, nsIFrame* aNewParent, nsIFrame* aFrameList, nsIFrame* aFrameListEnd, nsFrameConstructorState* aState, nsFrameConstructorState* aOuterState) { PRBool setHasChildWithView = PR_FALSE; while (aFrameList && aFrameList != aFrameListEnd) { if (!setHasChildWithView && (aFrameList->GetStateBits() & (NS_FRAME_HAS_VIEW | NS_FRAME_HAS_CHILD_WITH_VIEW))) { setHasChildWithView = PR_TRUE; } aFrameList->SetParent(aNewParent); // If aState is not null, the caller expects us to make adjustments so that // floats whose placeholders are descendants of frames in aFrameList point // to the correct parent. if (aState) { NS_ASSERTION(aOuterState, "need an outer state too"); AdjustFloatParentPtrs(aFrameList, *aState, *aOuterState); } aFrameList = aFrameList->GetNextSibling(); } if (setHasChildWithView) { do { aNewParent->AddStateBits(NS_FRAME_HAS_CHILD_WITH_VIEW); aNewParent = aNewParent->GetParent(); } while (aNewParent && !(aNewParent->GetStateBits() & NS_FRAME_HAS_CHILD_WITH_VIEW)); } } // ----------------------------------------------------------- // Structure used to ensure that bindings are properly enqueued in the // binding manager's attached queue. struct nsAutoEnqueueBinding { nsAutoEnqueueBinding(nsIDocument* aDocument) : mDocument(aDocument) {} ~nsAutoEnqueueBinding(); nsRefPtr mBinding; private: nsIDocument* mDocument; }; nsAutoEnqueueBinding::~nsAutoEnqueueBinding() { if (mBinding) { mDocument->BindingManager()->AddToAttachedQueue(mBinding); } } // Helper function that determines the child list name that aChildFrame // is contained in static nsIAtom* GetChildListNameFor(nsIFrame* aChildFrame) { nsIAtom* listName; if (aChildFrame->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER) { listName = nsGkAtoms::overflowContainersList; } // See if the frame is moved out of the flow else if (aChildFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW) { // Look at the style information to tell const nsStyleDisplay* disp = aChildFrame->GetStyleDisplay(); if (NS_STYLE_POSITION_ABSOLUTE == disp->mPosition) { listName = nsGkAtoms::absoluteList; } else if (NS_STYLE_POSITION_FIXED == disp->mPosition) { listName = nsGkAtoms::fixedList; #ifdef MOZ_XUL } else if (NS_STYLE_DISPLAY_POPUP == disp->mDisplay) { // Out-of-flows that are DISPLAY_POPUP must be kids of the root popup set #ifdef DEBUG nsIFrame* parent = aChildFrame->GetParent(); NS_ASSERTION(parent && parent->GetType() == nsGkAtoms::popupSetFrame, "Unexpected parent"); #endif // DEBUG // XXX FIXME: Bug 350740 // Return here, because the postcondition for this function actually // fails for this case, since the popups are not in a "real" frame list // in the popup set. return nsGkAtoms::popupList; #endif // MOZ_XUL } else { NS_ASSERTION(aChildFrame->GetStyleDisplay()->IsFloating(), "not a floated frame"); listName = nsGkAtoms::floatList; } } else { listName = nsnull; } #ifdef NS_DEBUG // Verify that the frame is actually in that child list or in the // corresponding overflow list. nsIFrame* parent = aChildFrame->GetParent(); PRBool found = nsFrameList(parent->GetFirstChild(listName)) .ContainsFrame(aChildFrame); if (!found) { if (!(aChildFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW)) { found = nsFrameList(parent->GetFirstChild(nsGkAtoms::overflowList)) .ContainsFrame(aChildFrame); } else if (aChildFrame->GetStyleDisplay()->IsFloating()) { found = nsFrameList(parent->GetFirstChild(nsGkAtoms::overflowOutOfFlowList)) .ContainsFrame(aChildFrame); } // else it's positioned and should have been on the 'listName' child list. NS_POSTCONDITION(found, "not in child list"); } #endif return listName; } //---------------------------------------------------------------------- nsCSSFrameConstructor::nsCSSFrameConstructor(nsIDocument *aDocument, nsIPresShell *aPresShell) : mDocument(aDocument) , mPresShell(aPresShell) , mInitialContainingBlock(nsnull) , mFixedContainingBlock(nsnull) , mDocElementContainingBlock(nsnull) , mGfxScrollFrame(nsnull) , mPageSequenceFrame(nsnull) , mUpdateCount(0) , mQuotesDirty(PR_FALSE) , mCountersDirty(PR_FALSE) , mInitialContainingBlockIsAbsPosContainer(PR_FALSE) , mIsDestroyingFrameTree(PR_FALSE) { if (!gGotXBLFormPrefs) { gGotXBLFormPrefs = PR_TRUE; gUseXBLForms = nsContentUtils::GetBoolPref("nglayout.debug.enable_xbl_forms"); } // XXXbz this should be in Init() or something! if (!mPendingRestyles.Init()) { // now what? } #ifdef DEBUG static PRBool gFirstTime = PR_TRUE; if (gFirstTime) { gFirstTime = PR_FALSE; char* flags = PR_GetEnv("GECKO_FRAMECTOR_DEBUG_FLAGS"); if (flags) { PRBool error = PR_FALSE; for (;;) { char* comma = PL_strchr(flags, ','); if (comma) *comma = '\0'; PRBool found = PR_FALSE; FrameCtorDebugFlags* flag = gFlags; FrameCtorDebugFlags* limit = gFlags + NUM_DEBUG_FLAGS; while (flag < limit) { if (PL_strcasecmp(flag->name, flags) == 0) { *(flag->on) = PR_TRUE; printf("nsCSSFrameConstructor: setting %s debug flag on\n", flag->name); found = PR_TRUE; break; } ++flag; } if (! found) error = PR_TRUE; if (! comma) break; *comma = ','; flags = comma + 1; } if (error) { printf("Here are the available GECKO_FRAMECTOR_DEBUG_FLAGS:\n"); FrameCtorDebugFlags* flag = gFlags; FrameCtorDebugFlags* limit = gFlags + NUM_DEBUG_FLAGS; while (flag < limit) { printf(" %s\n", flag->name); ++flag; } printf("Note: GECKO_FRAMECTOR_DEBUG_FLAGS is a comma separated list of flag\n"); printf("names (no whitespace)\n"); } } } #endif } nsIXBLService * nsCSSFrameConstructor::GetXBLService() { if (!gXBLService) { nsresult rv = CallGetService("@mozilla.org/xbl;1", &gXBLService); if (NS_FAILED(rv)) gXBLService = nsnull; } return gXBLService; } void nsCSSFrameConstructor::NotifyDestroyingFrame(nsIFrame* aFrame) { NS_PRECONDITION(mUpdateCount != 0, "Should be in an update while destroying frames"); if (aFrame->GetStateBits() & NS_FRAME_GENERATED_CONTENT) { if (mQuoteList.DestroyNodesFor(aFrame)) QuotesDirty(); } if (mCounterManager.DestroyNodesFor(aFrame)) { // Technically we don't need to update anything if we destroyed only // USE nodes. However, this is unlikely to happen in the real world // since USE nodes generally go along with INCREMENT nodes. CountersDirty(); } } nsresult nsCSSFrameConstructor::CreateAttributeContent(nsIContent* aParentContent, nsIFrame* aParentFrame, PRInt32 aAttrNamespace, nsIAtom* aAttrName, nsStyleContext* aStyleContext, nsCOMArray& aGeneratedContent, nsIContent** aNewContent, nsIFrame** aNewFrame) { *aNewFrame = nsnull; *aNewContent = nsnull; nsCOMPtr content; nsresult rv = NS_NewAttributeContent(mDocument->NodeInfoManager(), aAttrNamespace, aAttrName, getter_AddRefs(content)); NS_ENSURE_SUCCESS(rv, rv); content->SetNativeAnonymous(); // Set aContent as the parent content so that event handling works. rv = content->BindToTree(mDocument, aParentContent, content, PR_TRUE); if (NS_FAILED(rv)) { content->UnbindFromTree(); return rv; } // Create a text frame and initialize it nsIFrame* textFrame = NS_NewTextFrame(mPresShell, aStyleContext); rv = textFrame->Init(content, aParentFrame, nsnull); if (NS_SUCCEEDED(rv)) { if (NS_UNLIKELY(!aGeneratedContent.AppendObject(content))) { rv = NS_ERROR_OUT_OF_MEMORY; } } if (NS_FAILED(rv)) { content->UnbindFromTree(); textFrame->Destroy(); textFrame = nsnull; content = nsnull; } *aNewFrame = textFrame; content.swap(*aNewContent); return rv; } nsresult nsCSSFrameConstructor::CreateGeneratedFrameFor(nsIFrame* aParentFrame, nsIContent* aContent, nsStyleContext* aStyleContext, const nsStyleContent* aStyleContent, PRUint32 aContentIndex, nsCOMArray& aGeneratedContent, nsIFrame** aFrame) { *aFrame = nsnull; // initialize OUT parameter // The QuoteList needs the content attached to the frame. nsCOMPtr* textPtr = nsnull; // Get the content value const nsStyleContentData &data = aStyleContent->ContentAt(aContentIndex); nsStyleContentType type = data.mType; nsCOMPtr content; if (eStyleContentType_Image == type) { if (!data.mContent.mImage) { // CSS had something specified that couldn't be converted to an // image object return NS_ERROR_FAILURE; } // Create an image content object and pass it the image request. // XXX Check if it's an image type we can handle... nsCOMPtr nodeInfo; mDocument->NodeInfoManager()->GetNodeInfo(nsGkAtoms::img, nsnull, kNameSpaceID_None, getter_AddRefs(nodeInfo)); nsresult rv = NS_NewGenConImageContent(getter_AddRefs(content), nodeInfo, data.mContent.mImage); NS_ENSURE_SUCCESS(rv, rv); content->SetNativeAnonymous(); // Set aContent as the parent content and set the document object. This // way event handling works // Hack the binding parent to make document rules not match (not // like it matters, since we already have a non-element style // context... which is totally wacky, but anyway). rv = content->BindToTree(mDocument, aContent, content, PR_TRUE); if (NS_FAILED(rv)) { content->UnbindFromTree(); return rv; } // Create an image frame and initialize it nsIFrame* imageFrame = NS_NewImageFrame(mPresShell, aStyleContext); if (NS_UNLIKELY(!imageFrame)) { content->UnbindFromTree(); return NS_ERROR_OUT_OF_MEMORY; } rv = imageFrame->Init(content, aParentFrame, nsnull); if (NS_FAILED(rv) || NS_UNLIKELY(!aGeneratedContent.AppendObject(content))) { content->UnbindFromTree(); imageFrame->Destroy(); return NS_FAILED(rv) ? rv : NS_ERROR_OUT_OF_MEMORY; } // Return the image frame *aFrame = imageFrame; } else { nsAutoString contentString; switch (type) { case eStyleContentType_String: contentString = data.mContent.mString; break; case eStyleContentType_Attr: { nsCOMPtr attrName; PRInt32 attrNameSpace = kNameSpaceID_None; contentString = data.mContent.mString; PRInt32 barIndex = contentString.FindChar('|'); // CSS namespace delimiter if (-1 != barIndex) { nsAutoString nameSpaceVal; contentString.Left(nameSpaceVal, barIndex); PRInt32 error; attrNameSpace = nameSpaceVal.ToInteger(&error, 10); contentString.Cut(0, barIndex + 1); if (contentString.Length()) { attrName = do_GetAtom(contentString); } } else { attrName = do_GetAtom(contentString); } if (!attrName) { return NS_ERROR_OUT_OF_MEMORY; } nsresult rv = CreateAttributeContent(aContent, aParentFrame, attrNameSpace, attrName, aStyleContext, aGeneratedContent, getter_AddRefs(content), aFrame); NS_ENSURE_SUCCESS(rv, rv); } break; case eStyleContentType_Counter: case eStyleContentType_Counters: { nsCSSValue::Array *counters = data.mContent.mCounters; nsCounterList *counterList = mCounterManager.CounterListFor( nsDependentString(counters->Item(0).GetStringBufferValue())); if (!counterList) return NS_ERROR_OUT_OF_MEMORY; nsCounterUseNode* node = new nsCounterUseNode(counters, aParentFrame, aContentIndex, type == eStyleContentType_Counters); if (!node) return NS_ERROR_OUT_OF_MEMORY; counterList->Insert(node); PRBool dirty = counterList->IsDirty(); if (!dirty) { if (counterList->IsLast(node)) { node->Calc(counterList); node->GetText(contentString); } // In all other cases (list already dirty or node not at the end), // just start with an empty string for now and when we recalculate // the list we'll change the value to the right one. else { counterList->SetDirty(); CountersDirty(); } } textPtr = &node->mText; // text node assigned below } break; case eStyleContentType_Image: NS_NOTREACHED("handled by if above"); return NS_ERROR_UNEXPECTED; case eStyleContentType_OpenQuote: case eStyleContentType_CloseQuote: case eStyleContentType_NoOpenQuote: case eStyleContentType_NoCloseQuote: { nsQuoteNode* node = new nsQuoteNode(type, aParentFrame, aContentIndex); if (!node) return NS_ERROR_OUT_OF_MEMORY; mQuoteList.Insert(node); if (mQuoteList.IsLast(node)) mQuoteList.Calc(node); else QuotesDirty(); // Don't generate a text node or any text for 'no-open-quote' and // 'no-close-quote'. if (node->IsHiddenQuote()) return NS_OK; textPtr = &node->mText; // text node assigned below contentString = *node->Text(); } break; case eStyleContentType_AltContent: { // Use the "alt" attribute; if that fails and the node is an HTML // , try the value attribute and then fall back to some default // localized text we have. nsresult rv = NS_OK; if (aContent->HasAttr(kNameSpaceID_None, nsGkAtoms::alt)) { rv = CreateAttributeContent(aContent, aParentFrame, kNameSpaceID_None, nsGkAtoms::alt, aStyleContext, aGeneratedContent, getter_AddRefs(content), aFrame); } else if (aContent->IsNodeOfType(nsINode::eHTML) && aContent->NodeInfo()->Equals(nsGkAtoms::input)) { if (aContent->HasAttr(kNameSpaceID_None, nsGkAtoms::value)) { rv = CreateAttributeContent(aContent, aParentFrame, kNameSpaceID_None, nsGkAtoms::value, aStyleContext, aGeneratedContent, getter_AddRefs(content), aFrame); } else { nsXPIDLString temp; rv = nsContentUtils::GetLocalizedString(nsContentUtils::eFORMS_PROPERTIES, "Submit", temp); contentString = temp; } } else { *aFrame = nsnull; rv = NS_ERROR_NOT_AVAILABLE; return rv; // Don't fall through to the warning below. } NS_ENSURE_SUCCESS(rv, rv); } break; } // switch if (!content) { // Create a text content node nsIFrame* textFrame = nsnull; nsCOMPtr textContent; NS_NewTextNode(getter_AddRefs(textContent), mDocument->NodeInfoManager()); if (textContent) { // Set the text textContent->SetText(contentString, PR_TRUE); if (textPtr) { *textPtr = do_QueryInterface(textContent); NS_ASSERTION(*textPtr, "must implement nsIDOMCharacterData"); } textContent->SetNativeAnonymous(); // Set aContent as the parent content so that event handling works. nsresult rv = textContent->BindToTree(mDocument, aContent, textContent, PR_TRUE); if (NS_FAILED(rv)) { textContent->UnbindFromTree(); return rv; } // Create a text frame and initialize it textFrame = NS_NewTextFrame(mPresShell, aStyleContext); if (!textFrame) { // XXX The quotes/counters code doesn't like the text pointer // being null in case of dynamic changes! NS_NOTREACHED("this OOM case isn't handled very well"); return NS_ERROR_OUT_OF_MEMORY; } textFrame->Init(textContent, aParentFrame, nsnull); content = textContent; if (NS_UNLIKELY(!aGeneratedContent.AppendObject(content))) { NS_NOTREACHED("this OOM case isn't handled very well"); return NS_ERROR_OUT_OF_MEMORY; } } else { // XXX The quotes/counters code doesn't like the text pointer // being null in case of dynamic changes! NS_NOTREACHED("this OOM case isn't handled very well"); } // Return the text frame *aFrame = textFrame; } } return NS_OK; } /* * * aFrame - the frame that should be the parent of the generated * content. This is the frame for the corresponding content node, * which must not be a leaf frame. */ PRBool nsCSSFrameConstructor::CreateGeneratedContentFrame(nsFrameConstructorState& aState, nsIFrame* aFrame, nsIContent* aContent, nsStyleContext* aStyleContext, nsIAtom* aPseudoElement, nsIFrame** aResult) { *aResult = nsnull; // initialize OUT parameter if (!aContent->IsNodeOfType(nsINode::eELEMENT)) return PR_FALSE; nsStyleSet *styleSet = mPresShell->StyleSet(); // Probe for the existence of the pseudo-element nsRefPtr pseudoStyleContext; pseudoStyleContext = styleSet->ProbePseudoStyleFor(aContent, aPseudoElement, aStyleContext); if (pseudoStyleContext) { // |ProbePseudoStyleContext| checks the 'display' property and the // |ContentCount()| of the 'content' property for us. // Create a block box or an inline box depending on the value of // the 'display' property nsIFrame* containerFrame; nsFrameItems childFrames; nsresult rv; const PRUint8 disp = pseudoStyleContext->GetStyleDisplay()->mDisplay; if (disp == NS_STYLE_DISPLAY_BLOCK || disp == NS_STYLE_DISPLAY_INLINE_BLOCK) { PRUint32 flags = 0; if (disp == NS_STYLE_DISPLAY_INLINE_BLOCK) { flags = NS_BLOCK_SPACE_MGR | NS_BLOCK_MARGIN_ROOT; } containerFrame = NS_NewBlockFrame(mPresShell, pseudoStyleContext, flags); } else { containerFrame = NS_NewInlineFrame(mPresShell, pseudoStyleContext); } if (NS_UNLIKELY(!containerFrame)) { return PR_FALSE; } InitAndRestoreFrame(aState, aContent, aFrame, nsnull, containerFrame); // XXXbz should we be passing in a non-null aContentParentFrame? nsHTMLContainerFrame::CreateViewForFrame(containerFrame, nsnull, PR_FALSE); // Mark the frame as being associated with generated content containerFrame->AddStateBits(NS_FRAME_GENERATED_CONTENT); // Create an array to hold all the generated content created for this // frame below in CreateGeneratedFrameFor. No destructor function is // specified because the property is only set here and is removed in // a single place - nsContainerFrame::Destroy. nsCOMArray* generatedContent = new nsCOMArray; rv = containerFrame->SetProperty(nsGkAtoms::generatedContent, generatedContent); if (NS_UNLIKELY(!generatedContent) || NS_FAILED(rv)) { containerFrame->Destroy(); // this also destroys the created view delete generatedContent; return PR_FALSE; } // Create another pseudo style context to use for all the generated child // frames nsRefPtr textStyleContext; textStyleContext = styleSet->ResolveStyleForNonElement(pseudoStyleContext); // Now create content objects (and child frames) for each value of the // 'content' property const nsStyleContent* styleContent = pseudoStyleContext->GetStyleContent(); PRUint32 contentCount = styleContent->ContentCount(); for (PRUint32 contentIndex = 0; contentIndex < contentCount; contentIndex++) { nsIFrame* frame; // Create a frame rv = CreateGeneratedFrameFor(containerFrame, aContent, textStyleContext, styleContent, contentIndex, *generatedContent, &frame); // Non-elements can't possibly have a view, so don't bother checking if (NS_SUCCEEDED(rv) && frame) { // Add it to the list of child frames childFrames.AddChild(frame); } } if (childFrames.childList) { containerFrame->SetInitialChildList(nsnull, childFrames.childList); } *aResult = containerFrame; return PR_TRUE; } return PR_FALSE; } nsresult nsCSSFrameConstructor::CreateInputFrame(nsFrameConstructorState& aState, nsIContent* aContent, nsIFrame* aParentFrame, nsIAtom* aTag, nsStyleContext* aStyleContext, nsIFrame** aFrame, const nsStyleDisplay* aStyleDisplay, PRBool& aFrameHasBeenInitialized, PRBool& aAddedToFrameList, nsFrameItems& aFrameItems, PRBool aHasPseudoParent) { // Make sure to keep IsSpecialContent in synch with this code // Note: do not do anything in this method that assumes pseudo-frames have // been processed. If you feel the urge to do something like that, fix // callers accordingly. nsCOMPtr control = do_QueryInterface(aContent); NS_ASSERTION(control, "input is not an nsIFormControl!"); switch (control->GetType()) { case NS_FORM_INPUT_SUBMIT: case NS_FORM_INPUT_RESET: case NS_FORM_INPUT_BUTTON: { if (gUseXBLForms) return NS_OK; // update IsSpecialContent if this becomes functional nsresult rv = ConstructButtonFrame(aState, aContent, aParentFrame, aTag, aStyleContext, aFrame, aStyleDisplay, aFrameItems, aHasPseudoParent); aAddedToFrameList = PR_TRUE; aFrameHasBeenInitialized = PR_TRUE; return rv; } case NS_FORM_INPUT_CHECKBOX: if (gUseXBLForms) return NS_OK; // see comment above return ConstructCheckboxControlFrame(aFrame, aContent, aStyleContext); case NS_FORM_INPUT_RADIO: if (gUseXBLForms) return NS_OK; // see comment above return ConstructRadioControlFrame(aFrame, aContent, aStyleContext); case NS_FORM_INPUT_FILE: { *aFrame = NS_NewFileControlFrame(mPresShell, aStyleContext); if (*aFrame) { // The (block-like) file control frame should have a space manager (*aFrame)->AddStateBits(NS_BLOCK_SPACE_MGR); return NS_OK; } else { return NS_ERROR_OUT_OF_MEMORY; } } case NS_FORM_INPUT_HIDDEN: return NS_OK; // this does not create a frame so it needs special handling // in IsSpecialContent case NS_FORM_INPUT_IMAGE: return CreateHTMLImageFrame(aContent, aStyleContext, NS_NewImageControlFrame, aFrame); case NS_FORM_INPUT_TEXT: case NS_FORM_INPUT_PASSWORD: { *aFrame = NS_NewTextControlFrame(mPresShell, aStyleContext); return NS_UNLIKELY(!*aFrame) ? NS_ERROR_OUT_OF_MEMORY : NS_OK; } default: NS_ASSERTION(0, "Unknown input type!"); return NS_ERROR_INVALID_ARG; } } nsresult nsCSSFrameConstructor::CreateHTMLImageFrame(nsIContent* aContent, nsStyleContext* aStyleContext, ImageFrameCreatorFunc aFunc, nsIFrame** aFrame) { *aFrame = nsnull; // Make sure to keep IsSpecialContent in synch with this code if (nsImageFrame::ShouldCreateImageFrameFor(aContent, aStyleContext)) { *aFrame = (*aFunc)(mPresShell, aStyleContext); if (NS_UNLIKELY(!*aFrame)) return NS_ERROR_OUT_OF_MEMORY; } return NS_OK; } static PRBool TextIsOnlyWhitespace(nsIContent* aContent) { return aContent->IsNodeOfType(nsINode::eTEXT) && aContent->TextIsOnlyWhitespace(); } /**************************************************** ** BEGIN TABLE SECTION ****************************************************/ // The term pseudo frame is being used instead of anonymous frame, since anonymous // frame has been used elsewhere to refer to frames that have generated content // aIncludeSpecial applies to captions, col groups, cols and cells. // These do not generate pseudo frame wrappers for foreign children. static PRBool IsTableRelated(PRUint8 aDisplay, PRBool aIncludeSpecial) { if ((aDisplay == NS_STYLE_DISPLAY_TABLE) || (aDisplay == NS_STYLE_DISPLAY_INLINE_TABLE) || (aDisplay == NS_STYLE_DISPLAY_TABLE_HEADER_GROUP) || (aDisplay == NS_STYLE_DISPLAY_TABLE_ROW_GROUP) || (aDisplay == NS_STYLE_DISPLAY_TABLE_FOOTER_GROUP) || (aDisplay == NS_STYLE_DISPLAY_TABLE_ROW)) { return PR_TRUE; } else if (aIncludeSpecial && ((aDisplay == NS_STYLE_DISPLAY_TABLE_CAPTION) || (aDisplay == NS_STYLE_DISPLAY_TABLE_COLUMN_GROUP) || (aDisplay == NS_STYLE_DISPLAY_TABLE_COLUMN) || (aDisplay == NS_STYLE_DISPLAY_TABLE_CELL))) { return PR_TRUE; } else return PR_FALSE; } static PRBool IsTableRelated(nsIAtom* aParentType, PRBool aIncludeSpecial) { if ((nsGkAtoms::tableFrame == aParentType) || (nsGkAtoms::tableRowGroupFrame == aParentType) || (nsGkAtoms::tableRowFrame == aParentType)) { return PR_TRUE; } else if (aIncludeSpecial && ((nsGkAtoms::tableCaptionFrame == aParentType) || (nsGkAtoms::tableColGroupFrame == aParentType) || (nsGkAtoms::tableColFrame == aParentType) || IS_TABLE_CELL(aParentType))) { return PR_TRUE; } else return PR_FALSE; } static nsIFrame* AdjustCaptionParentFrame(nsIFrame* aParentFrame) { if (nsGkAtoms::tableFrame == aParentFrame->GetType()) { return aParentFrame->GetParent();; } return aParentFrame; } /** * If the parent frame is a |tableFrame| and the child is a * |captionFrame|, then we want to insert the frames beneath the * |tableFrame|'s parent frame. Returns |PR_TRUE| if the parent frame * needed to be fixed up. */ static PRBool GetCaptionAdjustedParent(nsIFrame* aParentFrame, const nsIFrame* aChildFrame, nsIFrame** aAdjParentFrame) { *aAdjParentFrame = aParentFrame; PRBool haveCaption = PR_FALSE; if (nsGkAtoms::tableCaptionFrame == aChildFrame->GetType()) { haveCaption = PR_TRUE; *aAdjParentFrame = AdjustCaptionParentFrame(aParentFrame); } return haveCaption; } static nsresult ProcessPseudoFrame(nsPseudoFrameData& aPseudoData, nsIFrame*& aParent) { nsresult rv = NS_OK; aParent = aPseudoData.mFrame; nsFrameItems* items = &aPseudoData.mChildList; if (items && items->childList) { rv = aParent->SetInitialChildList(nsnull, items->childList); if (NS_FAILED(rv)) return rv; } aPseudoData.Reset(); return rv; } static nsresult ProcessPseudoRowGroupFrame(nsPseudoFrameData& aPseudoData, nsIFrame*& aParent) { nsresult rv = NS_OK; aParent = aPseudoData.mFrame; nsFrameItems* items = &aPseudoData.mChildList; if (items && items->childList) { nsTableRowGroupFrame* rgFrame = nsTableFrame::GetRowGroupFrame(aParent); rv = rgFrame->SetInitialChildList(nsnull, items->childList); if (NS_FAILED(rv)) return rv; } aPseudoData.Reset(); return rv; } static nsresult ProcessPseudoTableFrame(nsPseudoFrames& aPseudoFrames, nsIFrame*& aParent) { nsresult rv = NS_OK; // process the col group frame, if it exists if (aPseudoFrames.mColGroup.mFrame) { rv = ProcessPseudoFrame(aPseudoFrames.mColGroup, aParent); } // process the inner table frame rv = ProcessPseudoFrame(aPseudoFrames.mTableInner, aParent); // process the outer table frame aParent = aPseudoFrames.mTableOuter.mFrame; nsFrameItems* items = &aPseudoFrames.mTableOuter.mChildList; if (items && items->childList) { rv = aParent->SetInitialChildList(nsnull, items->childList); if (NS_FAILED(rv)) return rv; } nsFrameItems* captions = &aPseudoFrames.mTableOuter.mChildList2; if (captions && captions->childList) { rv = aParent->SetInitialChildList(nsGkAtoms::captionList, captions->childList); } aPseudoFrames.mTableOuter.Reset(); return rv; } static nsresult ProcessPseudoCellFrame(nsPseudoFrames& aPseudoFrames, nsIFrame*& aParent) { nsresult rv = NS_OK; rv = ProcessPseudoFrame(aPseudoFrames.mCellInner, aParent); if (NS_FAILED(rv)) return rv; rv = ProcessPseudoFrame(aPseudoFrames.mCellOuter, aParent); return rv; } // limit the processing up to the frame type indicated by aHighestType. // make a complete processing when aHighestType is null static nsresult ProcessPseudoFrames(nsFrameConstructorState& aState, nsIAtom* aHighestType, nsIFrame*& aHighestFrame) { nsresult rv = NS_OK; aHighestFrame = nsnull; #ifdef DEBUG if (gTablePseudoFrame) { printf("*** ProcessPseudoFrames enter***\n"); aState.mPseudoFrames.Dump(); } #endif nsPseudoFrames& pseudoFrames = aState.mPseudoFrames; if (nsGkAtoms::tableFrame == pseudoFrames.mLowestType) { if (pseudoFrames.mColGroup.mFrame) { rv = ProcessPseudoFrame(pseudoFrames.mColGroup, aHighestFrame); if (nsGkAtoms::tableColGroupFrame == aHighestType) return rv; } rv = ProcessPseudoTableFrame(pseudoFrames, aHighestFrame); if (nsGkAtoms::tableOuterFrame == aHighestType) return rv; if (pseudoFrames.mCellOuter.mFrame) { rv = ProcessPseudoCellFrame(pseudoFrames, aHighestFrame); if (IS_TABLE_CELL(aHighestType)) return rv; } if (pseudoFrames.mRow.mFrame) { rv = ProcessPseudoFrame(pseudoFrames.mRow, aHighestFrame); if (nsGkAtoms::tableRowFrame == aHighestType) return rv; } if (pseudoFrames.mRowGroup.mFrame) { rv = ProcessPseudoRowGroupFrame(pseudoFrames.mRowGroup, aHighestFrame); if (nsGkAtoms::tableRowGroupFrame == aHighestType) return rv; } } else if (nsGkAtoms::tableRowGroupFrame == pseudoFrames.mLowestType) { rv = ProcessPseudoRowGroupFrame(pseudoFrames.mRowGroup, aHighestFrame); if (nsGkAtoms::tableRowGroupFrame == aHighestType) return rv; if (pseudoFrames.mColGroup.mFrame) { nsIFrame* colGroupHigh; rv = ProcessPseudoFrame(pseudoFrames.mColGroup, colGroupHigh); if (aHighestFrame && nsGkAtoms::tableRowGroupFrame == aHighestFrame->GetType() && !pseudoFrames.mTableInner.mFrame) { // table frames are special they can have two types of pseudo frames as // children that need to be processed in one pass, we only need to link // them if the parent is not a pseudo where the link is already done // We sort this later out inside nsTableFrame. colGroupHigh->SetNextSibling(aHighestFrame); } aHighestFrame = colGroupHigh; if (nsGkAtoms::tableColGroupFrame == aHighestType) return rv; } if (pseudoFrames.mTableOuter.mFrame) { rv = ProcessPseudoTableFrame(pseudoFrames, aHighestFrame); if (nsGkAtoms::tableOuterFrame == aHighestType) return rv; } if (pseudoFrames.mCellOuter.mFrame) { rv = ProcessPseudoCellFrame(pseudoFrames, aHighestFrame); if (IS_TABLE_CELL(aHighestType)) return rv; } if (pseudoFrames.mRow.mFrame) { rv = ProcessPseudoFrame(pseudoFrames.mRow, aHighestFrame); if (nsGkAtoms::tableRowFrame == aHighestType) return rv; } } else if (nsGkAtoms::tableRowFrame == pseudoFrames.mLowestType) { rv = ProcessPseudoFrame(pseudoFrames.mRow, aHighestFrame); if (nsGkAtoms::tableRowFrame == aHighestType) return rv; if (pseudoFrames.mRowGroup.mFrame) { rv = ProcessPseudoRowGroupFrame(pseudoFrames.mRowGroup, aHighestFrame); if (nsGkAtoms::tableRowGroupFrame == aHighestType) return rv; } if (pseudoFrames.mColGroup.mFrame) { nsIFrame* colGroupHigh; rv = ProcessPseudoFrame(pseudoFrames.mColGroup, colGroupHigh); if (aHighestFrame && nsGkAtoms::tableRowGroupFrame == aHighestFrame->GetType() && !pseudoFrames.mTableInner.mFrame) { // table frames are special they can have two types of pseudo frames as // children that need to be processed in one pass, we only need to link // them if the parent is not a pseudo where the link is already done // We sort this later out inside nsTableFrame. colGroupHigh->SetNextSibling(aHighestFrame); } aHighestFrame = colGroupHigh; if (nsGkAtoms::tableColGroupFrame == aHighestType) return rv; } if (pseudoFrames.mTableOuter.mFrame) { rv = ProcessPseudoTableFrame(pseudoFrames, aHighestFrame); if (nsGkAtoms::tableOuterFrame == aHighestType) return rv; } if (pseudoFrames.mCellOuter.mFrame) { rv = ProcessPseudoCellFrame(pseudoFrames, aHighestFrame); if (IS_TABLE_CELL(aHighestType)) return rv; } } else if (IS_TABLE_CELL(pseudoFrames.mLowestType)) { rv = ProcessPseudoCellFrame(pseudoFrames, aHighestFrame); if (IS_TABLE_CELL(aHighestType)) return rv; if (pseudoFrames.mRow.mFrame) { rv = ProcessPseudoFrame(pseudoFrames.mRow, aHighestFrame); if (nsGkAtoms::tableRowFrame == aHighestType) return rv; } if (pseudoFrames.mRowGroup.mFrame) { rv = ProcessPseudoRowGroupFrame(pseudoFrames.mRowGroup, aHighestFrame); if (nsGkAtoms::tableRowGroupFrame == aHighestType) return rv; } if (pseudoFrames.mColGroup.mFrame) { nsIFrame* colGroupHigh; rv = ProcessPseudoFrame(pseudoFrames.mColGroup, colGroupHigh); if (aHighestFrame && nsGkAtoms::tableRowGroupFrame == aHighestFrame->GetType() && !pseudoFrames.mTableInner.mFrame) { // table frames are special they can have two types of pseudo frames as // children that need to be processed in one pass, we only need to link // them if the parent is not a pseudo where the link is already done // We sort this later out inside nsTableFrame. colGroupHigh->SetNextSibling(aHighestFrame); } aHighestFrame = colGroupHigh; if (nsGkAtoms::tableColGroupFrame == aHighestType) return rv; } if (pseudoFrames.mTableOuter.mFrame) { rv = ProcessPseudoTableFrame(pseudoFrames, aHighestFrame); } } else if (pseudoFrames.mColGroup.mFrame) { // process the col group frame rv = ProcessPseudoFrame(pseudoFrames.mColGroup, aHighestFrame); } return rv; } static nsresult ProcessPseudoFrames(nsFrameConstructorState& aState, nsFrameItems& aItems) { #ifdef DEBUG if (gTablePseudoFrame) { printf("*** ProcessPseudoFrames complete enter***\n"); aState.mPseudoFrames.Dump(); } #endif nsIFrame* highestFrame; nsresult rv = ProcessPseudoFrames(aState, nsnull, highestFrame); if (highestFrame) { aItems.AddChild(highestFrame); } #ifdef DEBUG if (gTablePseudoFrame) { printf("*** ProcessPseudoFrames complete leave, highestframe:%p***\n", static_cast(highestFrame)); aState.mPseudoFrames.Dump(); } #endif aState.mPseudoFrames.Reset(); return rv; } static nsresult ProcessPseudoFrames(nsFrameConstructorState& aState, nsIAtom* aHighestType) { #ifdef DEBUG if (gTablePseudoFrame) { printf("*** ProcessPseudoFrames limited enter highest:"); if (nsGkAtoms::tableOuterFrame == aHighestType) printf("OuterTable"); else if (nsGkAtoms::tableFrame == aHighestType) printf("InnerTable"); else if (nsGkAtoms::tableColGroupFrame == aHighestType) printf("ColGroup"); else if (nsGkAtoms::tableRowGroupFrame == aHighestType) printf("RowGroup"); else if (nsGkAtoms::tableRowFrame == aHighestType) printf("Row"); else if (IS_TABLE_CELL(aHighestType)) printf("Cell"); else NS_ASSERTION(PR_FALSE, "invalid call to ProcessPseudoFrames "); printf("***\n"); aState.mPseudoFrames.Dump(); } #endif nsIFrame* highestFrame; nsresult rv = ProcessPseudoFrames(aState, aHighestType, highestFrame); #ifdef DEBUG if (gTablePseudoFrame) { printf("*** ProcessPseudoFrames limited leave:%p***\n", static_cast(highestFrame)); aState.mPseudoFrames.Dump(); } #endif return rv; } nsresult nsCSSFrameConstructor::CreatePseudoTableFrame(PRInt32 aNameSpaceID, nsFrameConstructorState& aState, nsIFrame* aParentFrameIn) { nsresult rv = NS_OK; nsIFrame* parentFrame = (aState.mPseudoFrames.mCellInner.mFrame) ? aState.mPseudoFrames.mCellInner.mFrame : aParentFrameIn; if (!parentFrame) return rv; nsStyleContext *parentStyle; nsRefPtr childStyle; parentStyle = parentFrame->GetStyleContext(); nsIContent* parentContent = parentFrame->GetContent(); // Thankfully, the parent can't change display type without causing // frame reconstruction, so this won't need to change. nsIAtom *pseudoType; if (parentStyle->GetStyleDisplay()->mDisplay == NS_STYLE_DISPLAY_INLINE) pseudoType = nsCSSAnonBoxes::inlineTable; else pseudoType = nsCSSAnonBoxes::table; // create the SC for the inner table which will be the parent of the outer table's SC childStyle = mPresShell->StyleSet()->ResolvePseudoStyleFor(parentContent, pseudoType, parentStyle); nsPseudoFrameData& pseudoOuter = aState.mPseudoFrames.mTableOuter; nsPseudoFrameData& pseudoInner = aState.mPseudoFrames.mTableInner; // construct the pseudo outer and inner as part of the pseudo frames nsFrameItems items; rv = ConstructTableFrame(aState, parentContent, parentFrame, childStyle, aNameSpaceID, PR_TRUE, items, PR_TRUE, pseudoOuter.mFrame, pseudoInner.mFrame); if (NS_FAILED(rv)) return rv; // set pseudo data for the newly created frames pseudoOuter.mChildList.AddChild(pseudoInner.mFrame); aState.mPseudoFrames.mLowestType = nsGkAtoms::tableFrame; // set pseudo data for the parent if (aState.mPseudoFrames.mCellInner.mFrame) { aState.mPseudoFrames.mCellInner.mChildList.AddChild(pseudoOuter.mFrame); } #ifdef DEBUG if (gTablePseudoFrame) { printf("*** CreatePseudoTableFrame ***\n"); aState.mPseudoFrames.Dump(); } #endif return rv; } nsresult nsCSSFrameConstructor::CreatePseudoRowGroupFrame(PRInt32 aNameSpaceID, nsFrameConstructorState& aState, nsIFrame* aParentFrameIn) { nsresult rv = NS_OK; nsIFrame* parentFrame = (aState.mPseudoFrames.mTableInner.mFrame) ? aState.mPseudoFrames.mTableInner.mFrame : aParentFrameIn; if (!parentFrame) return rv; nsStyleContext *parentStyle; nsRefPtr childStyle; parentStyle = parentFrame->GetStyleContext(); nsIContent* parentContent = parentFrame->GetContent(); childStyle = mPresShell->StyleSet()->ResolvePseudoStyleFor(parentContent, nsCSSAnonBoxes::tableRowGroup, parentStyle); nsPseudoFrameData& pseudo = aState.mPseudoFrames.mRowGroup; // construct the pseudo row group as part of the pseudo frames PRBool pseudoParent; nsFrameItems items; rv = ConstructTableRowGroupFrame(aState, parentContent, parentFrame, childStyle, aNameSpaceID, PR_TRUE, items, pseudo.mFrame, pseudoParent); if (NS_FAILED(rv)) return rv; // set pseudo data for the newly created frames aState.mPseudoFrames.mLowestType = nsGkAtoms::tableRowGroupFrame; // set pseudo data for the parent if (aState.mPseudoFrames.mTableInner.mFrame) { aState.mPseudoFrames.mTableInner.mChildList.AddChild(pseudo.mFrame); } #ifdef DEBUG if (gTablePseudoFrame) { printf("*** CreatePseudoRowGroupFrame ***\n"); aState.mPseudoFrames.Dump(); } #endif return rv; } nsresult nsCSSFrameConstructor::CreatePseudoColGroupFrame(PRInt32 aNameSpaceID, nsFrameConstructorState& aState, nsIFrame* aParentFrameIn) { nsresult rv = NS_OK; nsIFrame* parentFrame = (aState.mPseudoFrames.mTableInner.mFrame) ? aState.mPseudoFrames.mTableInner.mFrame : aParentFrameIn; if (!parentFrame) return rv; nsStyleContext *parentStyle; nsRefPtr childStyle; parentStyle = parentFrame->GetStyleContext(); nsIContent* parentContent = parentFrame->GetContent(); childStyle = mPresShell->StyleSet()->ResolvePseudoStyleFor(parentContent, nsCSSAnonBoxes::tableColGroup, parentStyle); nsPseudoFrameData& pseudo = aState.mPseudoFrames.mColGroup; // construct the pseudo col group as part of the pseudo frames PRBool pseudoParent; nsFrameItems items; rv = ConstructTableColGroupFrame(aState, parentContent, parentFrame, childStyle, aNameSpaceID, PR_TRUE, items, pseudo.mFrame, pseudoParent); if (NS_FAILED(rv)) return rv; ((nsTableColGroupFrame*)pseudo.mFrame)->SetColType(eColGroupAnonymousCol); // Do not set aState.mPseudoFrames.mLowestType here as colgroup frame will // be always below a table frame but we can not descent any further as col // frames can not have children and will not wrap table foreign frames. // set pseudo data for the parent if (aState.mPseudoFrames.mTableInner.mFrame) { aState.mPseudoFrames.mTableInner.mChildList.AddChild(pseudo.mFrame); } #ifdef DEBUG if (gTablePseudoFrame) { printf("*** CreatePseudoColGroupFrame ***\n"); aState.mPseudoFrames.Dump(); } #endif return rv; } nsresult nsCSSFrameConstructor::CreatePseudoRowFrame(PRInt32 aNameSpaceID, nsFrameConstructorState& aState, nsIFrame* aParentFrameIn) { nsresult rv = NS_OK; nsIFrame* parentFrame = aParentFrameIn; if (aState.mPseudoFrames.mRowGroup.mFrame) { parentFrame = (nsIFrame*) nsTableFrame::GetRowGroupFrame(aState.mPseudoFrames.mRowGroup.mFrame); } if (!parentFrame) return rv; nsStyleContext *parentStyle; nsRefPtr childStyle; parentStyle = parentFrame->GetStyleContext(); nsIContent* parentContent = parentFrame->GetContent(); childStyle = mPresShell->StyleSet()->ResolvePseudoStyleFor(parentContent, nsCSSAnonBoxes::tableRow, parentStyle); nsPseudoFrameData& pseudo = aState.mPseudoFrames.mRow; // construct the pseudo row as part of the pseudo frames PRBool pseudoParent; nsFrameItems items; rv = ConstructTableRowFrame(aState, parentContent, parentFrame, childStyle, aNameSpaceID, PR_TRUE, items, pseudo.mFrame, pseudoParent); if (NS_FAILED(rv)) return rv; aState.mPseudoFrames.mLowestType = nsGkAtoms::tableRowFrame; // set pseudo data for the parent if (aState.mPseudoFrames.mRowGroup.mFrame) { aState.mPseudoFrames.mRowGroup.mChildList.AddChild(pseudo.mFrame); } #ifdef DEBUG if (gTablePseudoFrame) { printf("*** CreatePseudoRowFrame ***\n"); aState.mPseudoFrames.Dump(); } #endif return rv; } nsresult nsCSSFrameConstructor::CreatePseudoCellFrame(PRInt32 aNameSpaceID, nsFrameConstructorState& aState, nsIFrame* aParentFrameIn) { nsresult rv = NS_OK; nsIFrame* parentFrame = (aState.mPseudoFrames.mRow.mFrame) ? aState.mPseudoFrames.mRow.mFrame : aParentFrameIn; if (!parentFrame) return rv; nsStyleContext *parentStyle; nsRefPtr childStyle; parentStyle = parentFrame->GetStyleContext(); nsIContent* parentContent = parentFrame->GetContent(); childStyle = mPresShell->StyleSet()->ResolvePseudoStyleFor(parentContent, nsCSSAnonBoxes::tableCell, parentStyle); nsPseudoFrameData& pseudoOuter = aState.mPseudoFrames.mCellOuter; nsPseudoFrameData& pseudoInner = aState.mPseudoFrames.mCellInner; // construct the pseudo outer and inner as part of the pseudo frames PRBool pseudoParent; nsFrameItems items; rv = ConstructTableCellFrame(aState, parentContent, parentFrame, childStyle, aNameSpaceID, PR_TRUE, items, pseudoOuter.mFrame, pseudoInner.mFrame, pseudoParent); if (NS_FAILED(rv)) return rv; // set pseudo data for the newly created frames pseudoOuter.mChildList.AddChild(pseudoInner.mFrame); // give it nsGkAtoms::tableCellFrame, if it is really nsGkAtoms::bcTableCellFrame, it will match later aState.mPseudoFrames.mLowestType = nsGkAtoms::tableCellFrame; // set pseudo data for the parent if (aState.mPseudoFrames.mRow.mFrame) { aState.mPseudoFrames.mRow.mChildList.AddChild(pseudoOuter.mFrame); } #ifdef DEBUG if (gTablePseudoFrame) { printf("*** CreatePseudoCellFrame ***\n"); aState.mPseudoFrames.Dump(); } #endif return rv; } // called if the parent is not a table nsresult nsCSSFrameConstructor::GetPseudoTableFrame(PRInt32 aNameSpaceID, nsFrameConstructorState& aState, nsIFrame& aParentFrameIn) { nsresult rv = NS_OK; nsPseudoFrames& pseudoFrames = aState.mPseudoFrames; nsIAtom* parentFrameType = aParentFrameIn.GetType(); if (pseudoFrames.IsEmpty()) { PRBool created = PR_FALSE; if (nsGkAtoms::tableRowGroupFrame == parentFrameType) { // row group parent rv = CreatePseudoRowFrame(aNameSpaceID, aState, &aParentFrameIn); if (NS_FAILED(rv)) return rv; created = PR_TRUE; } if (created || (nsGkAtoms::tableRowFrame == parentFrameType)) { // row parent rv = CreatePseudoCellFrame(aNameSpaceID, aState, &aParentFrameIn); if (NS_FAILED(rv)) return rv; } rv = CreatePseudoTableFrame(aNameSpaceID, aState, &aParentFrameIn); } else { if (!pseudoFrames.mTableInner.mFrame) { if (pseudoFrames.mRowGroup.mFrame && !(pseudoFrames.mRow.mFrame)) { rv = CreatePseudoRowFrame(aNameSpaceID, aState); if (NS_FAILED(rv)) return rv; } if (pseudoFrames.mRow.mFrame && !(pseudoFrames.mCellOuter.mFrame)) { rv = CreatePseudoCellFrame(aNameSpaceID, aState); if (NS_FAILED(rv)) return rv; } CreatePseudoTableFrame(aNameSpaceID, aState); } } return rv; } // called if the parent is not a col group nsresult nsCSSFrameConstructor::GetPseudoColGroupFrame(PRInt32 aNameSpaceID, nsFrameConstructorState& aState, nsIFrame& aParentFrameIn) { nsresult rv = NS_OK; nsPseudoFrames& pseudoFrames = aState.mPseudoFrames; nsIAtom* parentFrameType = aParentFrameIn.GetType(); if (pseudoFrames.IsEmpty()) { PRBool created = PR_FALSE; if (nsGkAtoms::tableRowGroupFrame == parentFrameType) { // row group parent rv = CreatePseudoRowFrame(aNameSpaceID, aState, &aParentFrameIn); created = PR_TRUE; } if (created || (nsGkAtoms::tableRowFrame == parentFrameType)) { // row parent rv = CreatePseudoCellFrame(aNameSpaceID, aState, &aParentFrameIn); created = PR_TRUE; } if (created || IS_TABLE_CELL(parentFrameType) || // cell parent (nsGkAtoms::tableCaptionFrame == parentFrameType) || // caption parent !IsTableRelated(parentFrameType, PR_TRUE)) { // block parent rv = CreatePseudoTableFrame(aNameSpaceID, aState, &aParentFrameIn); } rv = CreatePseudoColGroupFrame(aNameSpaceID, aState, &aParentFrameIn); } else { if (!pseudoFrames.mColGroup.mFrame) { if (!pseudoFrames.mTableInner.mFrame) { if (pseudoFrames.mRowGroup.mFrame && !(pseudoFrames.mRow.mFrame)) { rv = CreatePseudoRowFrame(aNameSpaceID, aState); } if (pseudoFrames.mRow.mFrame && !(pseudoFrames.mCellOuter.mFrame)) { rv = CreatePseudoCellFrame(aNameSpaceID, aState); } if (pseudoFrames.mCellOuter.mFrame && !(pseudoFrames.mTableOuter.mFrame)) { rv = CreatePseudoTableFrame(aNameSpaceID, aState); } } rv = CreatePseudoColGroupFrame(aNameSpaceID, aState); } } return rv; } // called if the parent is not a row group nsresult nsCSSFrameConstructor::GetPseudoRowGroupFrame(PRInt32 aNameSpaceID, nsFrameConstructorState& aState, nsIFrame& aParentFrameIn) { nsresult rv = NS_OK; nsPseudoFrames& pseudoFrames = aState.mPseudoFrames; nsIAtom* parentFrameType = aParentFrameIn.GetType(); if (!pseudoFrames.mLowestType) { PRBool created = PR_FALSE; if (nsGkAtoms::tableRowFrame == parentFrameType) { // row parent rv = CreatePseudoCellFrame(aNameSpaceID, aState, &aParentFrameIn); created = PR_TRUE; } if (created || IS_TABLE_CELL(parentFrameType) || // cell parent (nsGkAtoms::tableCaptionFrame == parentFrameType) || // caption parent !IsTableRelated(parentFrameType, PR_TRUE)) { // block parent rv = CreatePseudoTableFrame(aNameSpaceID, aState, &aParentFrameIn); } rv = CreatePseudoRowGroupFrame(aNameSpaceID, aState, &aParentFrameIn); } else { if (!pseudoFrames.mRowGroup.mFrame) { if (pseudoFrames.mRow.mFrame && !(pseudoFrames.mCellOuter.mFrame)) { rv = CreatePseudoCellFrame(aNameSpaceID, aState); } if (pseudoFrames.mCellOuter.mFrame && !(pseudoFrames.mTableOuter.mFrame)) { rv = CreatePseudoTableFrame(aNameSpaceID, aState); } rv = CreatePseudoRowGroupFrame(aNameSpaceID, aState); } } return rv; } // called if the parent is not a row nsresult nsCSSFrameConstructor::GetPseudoRowFrame(PRInt32 aNameSpaceID, nsFrameConstructorState& aState, nsIFrame& aParentFrameIn) { nsresult rv = NS_OK; nsPseudoFrames& pseudoFrames = aState.mPseudoFrames; nsIAtom* parentFrameType = aParentFrameIn.GetType(); if (!pseudoFrames.mLowestType) { PRBool created = PR_FALSE; if (IS_TABLE_CELL(parentFrameType) || // cell parent (nsGkAtoms::tableCaptionFrame == parentFrameType) || // caption parent !IsTableRelated(parentFrameType, PR_TRUE)) { // block parent rv = CreatePseudoTableFrame(aNameSpaceID, aState, &aParentFrameIn); created = PR_TRUE; } if (created || (nsGkAtoms::tableFrame == parentFrameType)) { // table parent rv = CreatePseudoRowGroupFrame(aNameSpaceID, aState, &aParentFrameIn); } rv = CreatePseudoRowFrame(aNameSpaceID, aState, &aParentFrameIn); } else { if (!pseudoFrames.mRow.mFrame) { if (pseudoFrames.mCellOuter.mFrame && !pseudoFrames.mTableOuter.mFrame) { rv = CreatePseudoTableFrame(aNameSpaceID, aState); } if (pseudoFrames.mTableInner.mFrame && !(pseudoFrames.mRowGroup.mFrame)) { rv = CreatePseudoRowGroupFrame(aNameSpaceID, aState); } rv = CreatePseudoRowFrame(aNameSpaceID, aState); } } return rv; } // called if the parent is not a cell or block nsresult nsCSSFrameConstructor::GetPseudoCellFrame(PRInt32 aNameSpaceID, nsFrameConstructorState& aState, nsIFrame& aParentFrameIn) { nsresult rv = NS_OK; nsPseudoFrames& pseudoFrames = aState.mPseudoFrames; nsIAtom* parentFrameType = aParentFrameIn.GetType(); if (!pseudoFrames.mLowestType) { PRBool created = PR_FALSE; if (nsGkAtoms::tableFrame == parentFrameType) { // table parent rv = CreatePseudoRowGroupFrame(aNameSpaceID, aState, &aParentFrameIn); created = PR_TRUE; } if (created || (nsGkAtoms::tableRowGroupFrame == parentFrameType)) { // row group parent rv = CreatePseudoRowFrame(aNameSpaceID, aState, &aParentFrameIn); created = PR_TRUE; } rv = CreatePseudoCellFrame(aNameSpaceID, aState, &aParentFrameIn); } else if (!pseudoFrames.mCellOuter.mFrame) { if (pseudoFrames.mTableInner.mFrame && !(pseudoFrames.mRowGroup.mFrame)) { rv = CreatePseudoRowGroupFrame(aNameSpaceID, aState); } if (pseudoFrames.mRowGroup.mFrame && !(pseudoFrames.mRow.mFrame)) { rv = CreatePseudoRowFrame(aNameSpaceID, aState); } rv = CreatePseudoCellFrame(aNameSpaceID, aState); } return rv; } nsresult nsCSSFrameConstructor::GetParentFrame(PRInt32 aNameSpaceID, nsIFrame& aParentFrameIn, nsIAtom* aChildFrameType, nsFrameConstructorState& aState, nsIFrame*& aParentFrame, PRBool& aIsPseudoParent) { nsresult rv = NS_OK; nsIAtom* parentFrameType = aParentFrameIn.GetType(); nsIFrame* pseudoParentFrame = nsnull; nsPseudoFrames& pseudoFrames = aState.mPseudoFrames; aParentFrame = &aParentFrameIn; aIsPseudoParent = PR_FALSE; if (nsGkAtoms::tableOuterFrame == aChildFrameType) { // table child if (IsTableRelated(parentFrameType, PR_TRUE) && (nsGkAtoms::tableCaptionFrame != parentFrameType) ) { // need pseudo cell parent rv = GetPseudoCellFrame(aNameSpaceID, aState, aParentFrameIn); if (NS_FAILED(rv)) return rv; pseudoParentFrame = pseudoFrames.mCellInner.mFrame; } } else if (nsGkAtoms::tableCaptionFrame == aChildFrameType) { // caption child if (nsGkAtoms::tableOuterFrame != parentFrameType) { // need pseudo table parent rv = GetPseudoTableFrame(aNameSpaceID, aState, aParentFrameIn); if (NS_FAILED(rv)) return rv; pseudoParentFrame = pseudoFrames.mTableOuter.mFrame; } } else if (nsGkAtoms::tableColGroupFrame == aChildFrameType) { // col group child if (nsGkAtoms::tableFrame != parentFrameType) { // need pseudo table parent rv = GetPseudoTableFrame(aNameSpaceID, aState, aParentFrameIn); if (NS_FAILED(rv)) return rv; pseudoParentFrame = pseudoFrames.mTableInner.mFrame; } } else if (nsGkAtoms::tableColFrame == aChildFrameType) { // col child if (nsGkAtoms::tableColGroupFrame != parentFrameType) { // need pseudo col group parent rv = GetPseudoColGroupFrame(aNameSpaceID, aState, aParentFrameIn); if (NS_FAILED(rv)) return rv; pseudoParentFrame = pseudoFrames.mColGroup.mFrame; } } else if (nsGkAtoms::tableRowGroupFrame == aChildFrameType) { // row group child // XXX can this go away? if (nsGkAtoms::tableFrame != parentFrameType) { // trees allow row groups to contain row groups, so don't create pseudo frames rv = GetPseudoTableFrame(aNameSpaceID, aState, aParentFrameIn); if (NS_FAILED(rv)) return rv; pseudoParentFrame = pseudoFrames.mTableInner.mFrame; } } else if (nsGkAtoms::tableRowFrame == aChildFrameType) { // row child if (nsGkAtoms::tableRowGroupFrame != parentFrameType) { // need pseudo row group parent rv = GetPseudoRowGroupFrame(aNameSpaceID, aState, aParentFrameIn); if (NS_FAILED(rv)) return rv; pseudoParentFrame = pseudoFrames.mRowGroup.mFrame; } } else if (IS_TABLE_CELL(aChildFrameType)) { // cell child if (nsGkAtoms::tableRowFrame != parentFrameType) { // need pseudo row parent rv = GetPseudoRowFrame(aNameSpaceID, aState, aParentFrameIn); if (NS_FAILED(rv)) return rv; pseudoParentFrame = pseudoFrames.mRow.mFrame; } } else if (nsGkAtoms::tableFrame == aChildFrameType) { // invalid NS_ASSERTION(PR_FALSE, "GetParentFrame called on nsGkAtoms::tableFrame child"); } else { // foreign frame if (IsTableRelated(parentFrameType, PR_FALSE)) { // need pseudo cell parent rv = GetPseudoCellFrame(aNameSpaceID, aState, aParentFrameIn); if (NS_FAILED(rv)) return rv; pseudoParentFrame = pseudoFrames.mCellInner.mFrame; } } if (pseudoParentFrame) { aParentFrame = pseudoParentFrame; aIsPseudoParent = PR_TRUE; } return rv; } static PRBool IsSpecialContent(nsIContent* aContent, nsIAtom* aTag, PRInt32 aNameSpaceID, nsStyleContext* aStyleContext) { // Gross hack. Return true if this is a content node that we'd create a // frame for based on something other than display -- in other words if this // is a node that could never have a nsTableCellFrame, for example. if (aContent->IsNodeOfType(nsINode::eHTML) || aNameSpaceID == kNameSpaceID_XHTML) { // XXXbz this is duplicating some logic from ConstructHTMLFrame.... // Would be nice to avoid that. :( if (aTag == nsGkAtoms::input) { nsCOMPtr control = do_QueryInterface(aContent); if (control) { PRInt32 type = control->GetType(); if (NS_FORM_INPUT_HIDDEN == type) { return PR_FALSE; // input hidden does not create a special frame } else if (NS_FORM_INPUT_IMAGE == type) { return nsImageFrame::ShouldCreateImageFrameFor(aContent, aStyleContext); } } return PR_TRUE; } if (aTag == nsGkAtoms::img) { return nsImageFrame::ShouldCreateImageFrameFor(aContent, aStyleContext); } if (aTag == nsGkAtoms::object || aTag == nsGkAtoms::applet || aTag == nsGkAtoms::embed) { return !(aContent->IntrinsicState() & (NS_EVENT_STATE_BROKEN | NS_EVENT_STATE_USERDISABLED | NS_EVENT_STATE_SUPPRESSED)); } return aTag == nsGkAtoms::br || aTag == nsGkAtoms::wbr || aTag == nsGkAtoms::textarea || aTag == nsGkAtoms::select || aTag == nsGkAtoms::fieldset || aTag == nsGkAtoms::legend || aTag == nsGkAtoms::frameset || aTag == nsGkAtoms::iframe || aTag == nsGkAtoms::spacer || aTag == nsGkAtoms::button || aTag == nsGkAtoms::isindex || aTag == nsGkAtoms::canvas; } if (aNameSpaceID == kNameSpaceID_XUL) return #ifdef MOZ_XUL aTag == nsGkAtoms::button || aTag == nsGkAtoms::checkbox || aTag == nsGkAtoms::radio || aTag == nsGkAtoms::autorepeatbutton || aTag == nsGkAtoms::titlebar || aTag == nsGkAtoms::resizer || aTag == nsGkAtoms::image || aTag == nsGkAtoms::spring || aTag == nsGkAtoms::spacer || aTag == nsGkAtoms::treechildren || aTag == nsGkAtoms::treecol || aTag == nsGkAtoms::text || aTag == nsGkAtoms::description || aTag == nsGkAtoms::label || aTag == nsGkAtoms::menu || aTag == nsGkAtoms::menuitem || aTag == nsGkAtoms::menubutton || aTag == nsGkAtoms::menubar || aTag == nsGkAtoms::popupgroup || aTag == nsGkAtoms::iframe || aTag == nsGkAtoms::editor || aTag == nsGkAtoms::browser || aTag == nsGkAtoms::progressmeter || #endif aTag == nsGkAtoms::slider || aTag == nsGkAtoms::scrollbar || aTag == nsGkAtoms::scrollbarbutton || #ifdef MOZ_XUL aTag == nsGkAtoms::splitter || #endif PR_FALSE; #ifdef MOZ_SVG if (aNameSpaceID == kNameSpaceID_SVG && NS_SVGEnabled()) { // All SVG content is special... return PR_TRUE; } #endif #ifdef MOZ_MATHML if (aNameSpaceID == kNameSpaceID_MathML) return aTag == nsGkAtoms::mi_ || aTag == nsGkAtoms::mn_ || aTag == nsGkAtoms::ms_ || aTag == nsGkAtoms::mtext_ || aTag == nsGkAtoms::mo_ || aTag == nsGkAtoms::mfrac_ || aTag == nsGkAtoms::msup_ || aTag == nsGkAtoms::msub_ || aTag == nsGkAtoms::msubsup_ || aTag == nsGkAtoms::munder_ || aTag == nsGkAtoms::mover_ || aTag == nsGkAtoms::munderover_ || aTag == nsGkAtoms::mphantom_ || aTag == nsGkAtoms::mpadded_ || aTag == nsGkAtoms::mspace_ || aTag == nsGkAtoms::mfenced_ || aTag == nsGkAtoms::mmultiscripts_ || aTag == nsGkAtoms::mstyle_ || aTag == nsGkAtoms::msqrt_ || aTag == nsGkAtoms::mroot_ || aTag == nsGkAtoms::maction_ || aTag == nsGkAtoms::mrow_ || aTag == nsGkAtoms::merror_ || aTag == nsGkAtoms::none || aTag == nsGkAtoms::mprescripts_ || (aTag == nsGkAtoms::mtable_ && aStyleContext->GetStyleDisplay()->mDisplay == NS_STYLE_DISPLAY_TABLE) || aTag == nsGkAtoms::math; #endif return PR_FALSE; } nsresult nsCSSFrameConstructor::AdjustParentFrame(nsFrameConstructorState& aState, nsIContent* aChildContent, nsIFrame* & aParentFrame, nsIAtom* aTag, PRInt32 aNameSpaceID, nsStyleContext* aChildStyle, nsFrameItems* & aFrameItems, nsFrameConstructorSaveState& aSaveState, PRBool& aSuppressFrame, PRBool& aCreatedPseudo) { NS_PRECONDITION(aChildStyle, "Must have child's style context"); NS_PRECONDITION(aFrameItems, "Must have frame items to work with"); aSuppressFrame = PR_FALSE; aCreatedPseudo = PR_FALSE; if (!aParentFrame) { // Nothing to do here return NS_OK; } PRBool childIsSpecialContent = PR_FALSE; // lazy lookup // Only use the outer table frame as parent if the child is going to use a // tableCaptionFrame, otherwise the inner table frame is the parent // (bug 341858). nsIAtom* parentType = aParentFrame->GetType(); NS_ASSERTION(parentType != nsGkAtoms::tableOuterFrame, "Shouldn't be happening"); if (parentType == nsGkAtoms::tableColGroupFrame) { childIsSpecialContent = IsSpecialContent(aChildContent, aTag, aNameSpaceID, aChildStyle); if (childIsSpecialContent || (aChildStyle->GetStyleDisplay()->mDisplay != NS_STYLE_DISPLAY_TABLE_COLUMN)) { aSuppressFrame = PR_TRUE; return NS_OK; } } // If our parent is a table, table-row-group, or table-row, and // we're not table-related in any way, we have to create table // pseudo-frames so that we have a table cell to live in. if (IsTableRelated(aParentFrame->GetType(), PR_FALSE) && (!IsTableRelated(aChildStyle->GetStyleDisplay()->mDisplay, PR_TRUE) || // Also need to create a pseudo-parent if the child is going to end up // with a frame based on something other than display. childIsSpecialContent || // looked it up before IsSpecialContent(aChildContent, aTag, aNameSpaceID, aChildStyle))) { nsresult rv = GetPseudoCellFrame(aNameSpaceID, aState, *aParentFrame); if (NS_FAILED(rv)) { return rv; } NS_ASSERTION(aState.mPseudoFrames.mCellInner.mFrame, "Must have inner cell frame now!"); aParentFrame = aState.mPseudoFrames.mCellInner.mFrame; aFrameItems = &aState.mPseudoFrames.mCellInner.mChildList; // We pushed an anonymous table cell. The inner block of this // needs to become the float containing block. aState.PushFloatContainingBlock(aParentFrame, aSaveState, PR_FALSE, PR_FALSE); aCreatedPseudo = PR_TRUE; } return NS_OK; } // Pull all the captions present in aItems out into aCaptions static void PullOutCaptionFrames(nsFrameItems& aItems, nsFrameItems& aCaptions) { nsIFrame *child = aItems.childList; nsIFrame* prev = nsnull; while (child) { nsIFrame *nextSibling = child->GetNextSibling(); if (nsGkAtoms::tableCaptionFrame == child->GetType()) { aItems.RemoveChild(child, prev); aCaptions.AddChild(child); } else { prev = child; } child = nextSibling; } } // Construct the outer, inner table frames and the children frames for the table. // XXX Page break frames for pseudo table frames are not constructed to avoid the risk // associated with revising the pseudo frame mechanism. The long term solution // of having frames handle page-break-before/after will solve the problem. nsresult nsCSSFrameConstructor::ConstructTableFrame(nsFrameConstructorState& aState, nsIContent* aContent, nsIFrame* aContentParent, nsStyleContext* aStyleContext, PRInt32 aNameSpaceID, PRBool aIsPseudo, nsFrameItems& aChildItems, PRBool aAllowOutOfFlow, nsIFrame*& aNewOuterFrame, nsIFrame*& aNewInnerFrame) { nsresult rv = NS_OK; // create the pseudo SC for the outer table as a child of the inner SC nsRefPtr outerStyleContext; outerStyleContext = mPresShell->StyleSet()-> ResolvePseudoStyleFor(aContent, nsCSSAnonBoxes::tableOuter, aStyleContext); // Create the outer table frame which holds the caption and inner table frame #ifdef MOZ_MATHML if (kNameSpaceID_MathML == aNameSpaceID) aNewOuterFrame = NS_NewMathMLmtableOuterFrame(mPresShell, outerStyleContext); else #endif aNewOuterFrame = NS_NewTableOuterFrame(mPresShell, outerStyleContext); nsIFrame* parentFrame = aContentParent; nsFrameItems* frameItems = &aChildItems; // We may need to push a float containing block nsFrameConstructorSaveState floatSaveState; if (!aIsPseudo) { // this frame may have a pseudo parent PRBool hasPseudoParent = PR_FALSE; GetParentFrame(aNameSpaceID,*parentFrame, nsGkAtoms::tableOuterFrame, aState, parentFrame, hasPseudoParent); if (!hasPseudoParent && !aState.mPseudoFrames.IsEmpty()) { ProcessPseudoFrames(aState, aChildItems); } if (hasPseudoParent) { aState.PushFloatContainingBlock(parentFrame, floatSaveState, PR_FALSE, PR_FALSE); frameItems = &aState.mPseudoFrames.mCellInner.mChildList; if (aState.mPseudoFrames.mTableOuter.mFrame) { ProcessPseudoFrames(aState, nsGkAtoms::tableOuterFrame); } } } // We need the aAllowOutOfFlow thing for MathML. See bug 355993. // Once bug 348577 is fixed, we should remove this code. At that // point, the aAllowOutOfFlow arg can go away. nsIFrame* geometricParent = aAllowOutOfFlow ? aState.GetGeometricParent(outerStyleContext->GetStyleDisplay(), parentFrame) : parentFrame; // Init the table outer frame and see if we need to create a view, e.g. // the frame is absolutely positioned InitAndRestoreFrame(aState, aContent, geometricParent, nsnull, aNewOuterFrame); nsHTMLContainerFrame::CreateViewForFrame(aNewOuterFrame, aContentParent, PR_FALSE); // Create the inner table frame #ifdef MOZ_MATHML if (kNameSpaceID_MathML == aNameSpaceID) aNewInnerFrame = NS_NewMathMLmtableFrame(mPresShell, aStyleContext); else #endif aNewInnerFrame = NS_NewTableFrame(mPresShell, aStyleContext); InitAndRestoreFrame(aState, aContent, aNewOuterFrame, nsnull, aNewInnerFrame); if (!aIsPseudo) { // Put the newly created frames into the right child list aNewOuterFrame->SetInitialChildList(nsnull, aNewInnerFrame); rv = aState.AddChild(aNewOuterFrame, *frameItems, aContent, aStyleContext, parentFrame, aAllowOutOfFlow, aAllowOutOfFlow); if (NS_FAILED(rv)) { return rv; } nsFrameItems childItems; rv = ProcessChildren(aState, aContent, aNewInnerFrame, PR_FALSE, childItems, PR_FALSE); // XXXbz what about cleaning up? if (NS_FAILED(rv)) return rv; // if there are any anonymous children for the table, create frames for them CreateAnonymousFrames(nsnull, aState, aContent, aNewInnerFrame, PR_FALSE, childItems); nsFrameItems captionItems; PullOutCaptionFrames(childItems, captionItems); // Set the inner table frame's initial primary list aNewInnerFrame->SetInitialChildList(nsnull, childItems.childList); // Set the outer table frame's secondary childlist lists if (captionItems.childList) { aNewOuterFrame->SetInitialChildList(nsGkAtoms::captionList, captionItems.childList); } } return rv; } nsresult nsCSSFrameConstructor::ConstructTableCaptionFrame(nsFrameConstructorState& aState, nsIContent* aContent, nsIFrame* aParentFrameIn, nsStyleContext* aStyleContext, PRInt32 aNameSpaceID, nsFrameItems& aChildItems, nsIFrame*& aNewFrame, PRBool& aIsPseudoParent) { nsresult rv = NS_OK; if (!aParentFrameIn) return rv; nsIFrame* parentFrame = aParentFrameIn; aIsPseudoParent = PR_FALSE; // this frame may have a pseudo parent GetParentFrame(aNameSpaceID, *aParentFrameIn, nsGkAtoms::tableCaptionFrame, aState, parentFrame, aIsPseudoParent); if (!aIsPseudoParent && !aState.mPseudoFrames.IsEmpty()) { ProcessPseudoFrames(aState, aChildItems); } aNewFrame = NS_NewTableCaptionFrame(mPresShell, aStyleContext); if (NS_UNLIKELY(!aNewFrame)) { return NS_ERROR_OUT_OF_MEMORY; } InitAndRestoreFrame(aState, aContent, parentFrame, nsnull, aNewFrame); // XXXbz should we be passing in a non-null aContentParentFrame? nsHTMLContainerFrame::CreateViewForFrame(aNewFrame, nsnull, PR_FALSE); PRBool haveFirstLetterStyle, haveFirstLineStyle; ShouldHaveSpecialBlockStyle(aContent, aStyleContext, &haveFirstLetterStyle, &haveFirstLineStyle); // The caption frame is a float container nsFrameConstructorSaveState floatSaveState; aState.PushFloatContainingBlock(aNewFrame, floatSaveState, haveFirstLetterStyle, haveFirstLineStyle); nsFrameItems childItems; rv = ProcessChildren(aState, aContent, aNewFrame, PR_TRUE, childItems, PR_TRUE); if (NS_FAILED(rv)) return rv; aNewFrame->SetInitialChildList(nsnull, childItems.childList); if (aIsPseudoParent) { aState.mPseudoFrames.mTableOuter.mChildList2.AddChild(aNewFrame); } return rv; } nsresult nsCSSFrameConstructor::ConstructTableRowGroupFrame(nsFrameConstructorState& aState, nsIContent* aContent, nsIFrame* aParentFrameIn, nsStyleContext* aStyleContext, PRInt32 aNameSpaceID, PRBool aIsPseudo, nsFrameItems& aChildItems, nsIFrame*& aNewFrame, PRBool& aIsPseudoParent) { nsresult rv = NS_OK; if (!aParentFrameIn) return rv; nsIFrame* parentFrame = aParentFrameIn; aIsPseudoParent = PR_FALSE; if (!aIsPseudo) { // this frame may have a pseudo parent GetParentFrame(aNameSpaceID, *aParentFrameIn, nsGkAtoms::tableRowGroupFrame, aState, parentFrame, aIsPseudoParent); if (!aIsPseudoParent && !aState.mPseudoFrames.IsEmpty()) { ProcessPseudoFrames(aState, aChildItems); } if (!aIsPseudo && aIsPseudoParent && aState.mPseudoFrames.mRowGroup.mFrame) { ProcessPseudoFrames(aState, nsGkAtoms::tableRowGroupFrame); } } const nsStyleDisplay* styleDisplay = aStyleContext->GetStyleDisplay(); aNewFrame = NS_NewTableRowGroupFrame(mPresShell, aStyleContext); nsIFrame* scrollFrame = nsnull; if (styleDisplay->IsScrollableOverflow()) { // Create an area container for the frame BuildScrollFrame(aState, aContent, aStyleContext, aNewFrame, parentFrame, nsnull, scrollFrame, aStyleContext); } else { if (NS_UNLIKELY(!aNewFrame)) { return NS_ERROR_OUT_OF_MEMORY; } InitAndRestoreFrame(aState, aContent, parentFrame, nsnull, aNewFrame); // XXXbz should we be passing in a non-null aContentParentFrame? nsHTMLContainerFrame::CreateViewForFrame(aNewFrame, nsnull, PR_FALSE); } if (!aIsPseudo) { nsFrameItems childItems; rv = ProcessChildren(aState, aContent, aNewFrame, PR_FALSE, childItems, PR_FALSE); if (NS_FAILED(rv)) return rv; // if there are any anonymous children for the table, create frames for them CreateAnonymousFrames(nsnull, aState, aContent, aNewFrame, PR_FALSE, childItems); aNewFrame->SetInitialChildList(nsnull, childItems.childList); if (aIsPseudoParent) { nsIFrame* child = (scrollFrame) ? scrollFrame : aNewFrame; aState.mPseudoFrames.mTableInner.mChildList.AddChild(child); } } // if there is a scroll frame, use it as the one constructed if (scrollFrame) { aNewFrame = scrollFrame; } return rv; } nsresult nsCSSFrameConstructor::ConstructTableColGroupFrame(nsFrameConstructorState& aState, nsIContent* aContent, nsIFrame* aParentFrameIn, nsStyleContext* aStyleContext, PRInt32 aNameSpaceID, PRBool aIsPseudo, nsFrameItems& aChildItems, nsIFrame*& aNewFrame, PRBool& aIsPseudoParent) { nsresult rv = NS_OK; if (!aParentFrameIn) return rv; nsIFrame* parentFrame = aParentFrameIn; aIsPseudoParent = PR_FALSE; if (!aIsPseudo) { // this frame may have a pseudo parent GetParentFrame(aNameSpaceID, *aParentFrameIn, nsGkAtoms::tableColGroupFrame, aState, parentFrame, aIsPseudoParent); if (!aIsPseudoParent && !aState.mPseudoFrames.IsEmpty()) { ProcessPseudoFrames(aState, aChildItems); } if (!aIsPseudo && aIsPseudoParent && aState.mPseudoFrames.mColGroup.mFrame) { ProcessPseudoFrames(aState, nsGkAtoms::tableColGroupFrame); } } aNewFrame = NS_NewTableColGroupFrame(mPresShell, aStyleContext); if (NS_UNLIKELY(!aNewFrame)) { return NS_ERROR_OUT_OF_MEMORY; } InitAndRestoreFrame(aState, aContent, parentFrame, nsnull, aNewFrame); if (!aIsPseudo) { nsFrameItems childItems; rv = ProcessChildren(aState, aContent, aNewFrame, PR_FALSE, childItems, PR_FALSE); if (NS_FAILED(rv)) return rv; aNewFrame->SetInitialChildList(nsnull, childItems.childList); if (aIsPseudoParent) { aState.mPseudoFrames.mTableInner.mChildList.AddChild(aNewFrame); } } return rv; } nsresult nsCSSFrameConstructor::ConstructTableRowFrame(nsFrameConstructorState& aState, nsIContent* aContent, nsIFrame* aParentFrameIn, nsStyleContext* aStyleContext, PRInt32 aNameSpaceID, PRBool aIsPseudo, nsFrameItems& aChildItems, nsIFrame*& aNewFrame, PRBool& aIsPseudoParent) { nsresult rv = NS_OK; if (!aParentFrameIn) return rv; nsIFrame* parentFrame = aParentFrameIn; aIsPseudoParent = PR_FALSE; if (!aIsPseudo) { // this frame may have a pseudo parent GetParentFrame(aNameSpaceID, *aParentFrameIn, nsGkAtoms::tableRowFrame, aState, parentFrame, aIsPseudoParent); if (!aIsPseudoParent && !aState.mPseudoFrames.IsEmpty()) { ProcessPseudoFrames(aState, aChildItems); } if (!aIsPseudo && aIsPseudoParent && aState.mPseudoFrames.mRow.mFrame) { ProcessPseudoFrames(aState, nsGkAtoms::tableRowFrame); } } #ifdef MOZ_MATHML if (kNameSpaceID_MathML == aNameSpaceID) aNewFrame = NS_NewMathMLmtrFrame(mPresShell, aStyleContext); else #endif aNewFrame = NS_NewTableRowFrame(mPresShell, aStyleContext); if (NS_UNLIKELY(!aNewFrame)) { return NS_ERROR_OUT_OF_MEMORY; } InitAndRestoreFrame(aState, aContent, parentFrame, nsnull, aNewFrame); // XXXbz should we be passing in a non-null aContentParentFrame? nsHTMLContainerFrame::CreateViewForFrame(aNewFrame, nsnull, PR_FALSE); if (!aIsPseudo) { nsFrameItems childItems; rv = ProcessChildren(aState, aContent, aNewFrame, PR_FALSE, childItems, PR_FALSE); if (NS_FAILED(rv)) return rv; // if there are any anonymous children for the table, create frames for them CreateAnonymousFrames(nsnull, aState, aContent, aNewFrame, PR_FALSE, childItems); aNewFrame->SetInitialChildList(nsnull, childItems.childList); if (aIsPseudoParent) { aState.mPseudoFrames.mRowGroup.mChildList.AddChild(aNewFrame); } } return rv; } nsresult nsCSSFrameConstructor::ConstructTableColFrame(nsFrameConstructorState& aState, nsIContent* aContent, nsIFrame* aParentFrameIn, nsStyleContext* aStyleContext, PRInt32 aNameSpaceID, PRBool aIsPseudo, nsFrameItems& aChildItems, nsIFrame*& aNewFrame, PRBool& aIsPseudoParent) { nsresult rv = NS_OK; if (!aParentFrameIn || !aStyleContext) return rv; nsIFrame* parentFrame = aParentFrameIn; aIsPseudoParent = PR_FALSE; if (!aIsPseudo) { // this frame may have a pseudo parent GetParentFrame(aNameSpaceID, *aParentFrameIn, nsGkAtoms::tableColFrame, aState, parentFrame, aIsPseudoParent); if (!aIsPseudoParent && !aState.mPseudoFrames.IsEmpty()) { ProcessPseudoFrames(aState, aChildItems); } } nsTableColFrame* colFrame = NS_NewTableColFrame(mPresShell, aStyleContext); aNewFrame = colFrame; if (NS_UNLIKELY(!aNewFrame)) { return NS_ERROR_OUT_OF_MEMORY; } InitAndRestoreFrame(aState, aContent, parentFrame, nsnull, aNewFrame); // construct additional col frames if the col frame has a span > 1 PRInt32 span = colFrame->GetSpan(); nsIFrame* lastCol = aNewFrame; nsStyleContext* styleContext = nsnull; for (PRInt32 spanX = 1; spanX < span; spanX++) { // The same content node should always resolve to the same style context. if (1 == spanX) styleContext = aNewFrame->GetStyleContext(); nsTableColFrame* newCol = NS_NewTableColFrame(mPresShell, styleContext); if (NS_UNLIKELY(!newCol)) { return NS_ERROR_OUT_OF_MEMORY; } InitAndRestoreFrame(aState, aContent, parentFrame, nsnull, newCol, PR_FALSE); lastCol->SetNextSibling(newCol); lastCol->SetNextContinuation(newCol); newCol->SetPrevContinuation(lastCol); newCol->SetColType(eColAnonymousCol); lastCol = newCol; } if (!aIsPseudo && aIsPseudoParent) { aState.mPseudoFrames.mColGroup.mChildList.AddChild(aNewFrame); } return rv; } nsresult nsCSSFrameConstructor::ConstructTableCellFrame(nsFrameConstructorState& aState, nsIContent* aContent, nsIFrame* aParentFrameIn, nsStyleContext* aStyleContext, PRInt32 aNameSpaceID, PRBool aIsPseudo, nsFrameItems& aChildItems, nsIFrame*& aNewCellOuterFrame, nsIFrame*& aNewCellInnerFrame, PRBool& aIsPseudoParent) { nsresult rv = NS_OK; if (!aParentFrameIn) return rv; nsIFrame* parentFrame = aParentFrameIn; aIsPseudoParent = PR_FALSE; if (!aIsPseudo) { // this frame may have a pseudo parent // use nsGkAtoms::tableCellFrame which will match if it is really nsGkAtoms::bcTableCellFrame GetParentFrame(aNameSpaceID, *aParentFrameIn, nsGkAtoms::tableCellFrame, aState, parentFrame, aIsPseudoParent); if (!aIsPseudoParent && !aState.mPseudoFrames.IsEmpty()) { ProcessPseudoFrames(aState, aChildItems); } if (!aIsPseudo && aIsPseudoParent && aState.mPseudoFrames.mCellOuter.mFrame) { ProcessPseudoFrames(aState, nsGkAtoms::tableCellFrame); } } #ifdef MOZ_MATHML // is border separate in mathml.css and the MathML code doesn't implement // border collapse. For those users who style with border collapse, // give them the default non-MathML table frames that understand border collpase. // This won't break us because MathML table frames are all subclasses of the default // table code, and so we can freely mix with or , or . // What will happen is just that non-MathML frames won't understand MathML attributes // and will therefore miss the special handling that the MathML code does. if (kNameSpaceID_MathML == aNameSpaceID && !IsBorderCollapse(parentFrame)) aNewCellOuterFrame = NS_NewMathMLmtdFrame(mPresShell, aStyleContext); else #endif // Warning: If you change this and add a wrapper frame around table cell // frames, make sure Bug 368554 doesn't regress! // See IsInAutoWidthTableCellForQuirk() in nsImageFrame.cpp. aNewCellOuterFrame = NS_NewTableCellFrame(mPresShell, aStyleContext, IsBorderCollapse(parentFrame)); if (NS_UNLIKELY(!aNewCellOuterFrame)) { return NS_ERROR_OUT_OF_MEMORY; } // Initialize the table cell frame InitAndRestoreFrame(aState, aContent, parentFrame, nsnull, aNewCellOuterFrame); // XXXbz should we be passing in a non-null aContentParentFrame? nsHTMLContainerFrame::CreateViewForFrame(aNewCellOuterFrame, nsnull, PR_FALSE); // Resolve pseudo style and initialize the body cell frame nsRefPtr innerPseudoStyle; innerPseudoStyle = mPresShell->StyleSet()-> ResolvePseudoStyleFor(aContent, nsCSSAnonBoxes::cellContent, aStyleContext); // Create a block frame that will format the cell's content PRBool isBlock; #ifdef MOZ_MATHML if (kNameSpaceID_MathML == aNameSpaceID) { aNewCellInnerFrame = NS_NewMathMLmtdInnerFrame(mPresShell, innerPseudoStyle); isBlock = PR_FALSE; } else #endif { aNewCellInnerFrame = NS_NewTableCellInnerFrame(mPresShell, innerPseudoStyle); isBlock = PR_TRUE; } if (NS_UNLIKELY(!aNewCellInnerFrame)) { aNewCellOuterFrame->Destroy(); aNewCellOuterFrame = nsnull; return NS_ERROR_OUT_OF_MEMORY; } InitAndRestoreFrame(aState, aContent, aNewCellOuterFrame, nsnull, aNewCellInnerFrame); if (!aIsPseudo) { PRBool haveFirstLetterStyle, haveFirstLineStyle; if (isBlock) { ShouldHaveSpecialBlockStyle(aContent, aStyleContext, &haveFirstLetterStyle, &haveFirstLineStyle); } // The block frame is a float container nsFrameConstructorSaveState floatSaveState; if (isBlock) { aState.PushFloatContainingBlock(aNewCellInnerFrame, floatSaveState, haveFirstLetterStyle, haveFirstLineStyle); } // Process the child content nsFrameItems childItems; rv = ProcessChildren(aState, aContent, aNewCellInnerFrame, PR_TRUE, childItems, isBlock); if (NS_FAILED(rv)) { // Clean up // XXXbz kids of this stuff need to be cleaned up too! aNewCellInnerFrame->Destroy(); aNewCellInnerFrame = nsnull; aNewCellOuterFrame->Destroy(); aNewCellOuterFrame = nsnull; return rv; } aNewCellInnerFrame->SetInitialChildList(nsnull, childItems.childList); aNewCellOuterFrame->SetInitialChildList(nsnull, aNewCellInnerFrame); if (aIsPseudoParent) { aState.mPseudoFrames.mRow.mChildList.AddChild(aNewCellOuterFrame); } } return rv; } static PRBool NeedFrameFor(nsIFrame* aParentFrame, nsIContent* aChildContent) { // don't create a whitespace frame if aParentFrame doesn't want it if ((NS_FRAME_EXCLUDE_IGNORABLE_WHITESPACE & aParentFrame->GetStateBits()) && TextIsOnlyWhitespace(aChildContent)) { return PR_FALSE; } return PR_TRUE; } const nsStyleDisplay* nsCSSFrameConstructor::GetDisplay(nsIFrame* aFrame) { if (nsnull == aFrame) { return nsnull; } return aFrame->GetStyleContext()->GetStyleDisplay(); } /*********************************************** * END TABLE SECTION ***********************************************/ nsresult nsCSSFrameConstructor::ConstructDocElementTableFrame(nsIContent* aDocElement, nsIFrame* aParentFrame, nsIFrame** aNewTableFrame, nsFrameConstructorState& aState) { nsFrameItems frameItems; // XXXbz this is wrong. We should at least be setting the fixed container in // the framestate here. Better yet, we should pass through aState // unmodified. Can't do that, though, because then a fixed or absolute // positioned root table with auto offsets would look for a block to compute // its hypothetical box and crash. So we just disable fixed positioning // altogether in documents where the root is a table. Oh, well. nsFrameConstructorState state(mPresShell, nsnull, nsnull, nsnull, aState.mFrameState); ConstructFrame(state, aDocElement, aParentFrame, frameItems); *aNewTableFrame = frameItems.childList; if (!*aNewTableFrame) { NS_WARNING("cannot get table contentFrame"); // XXXbz maybe better to return the error from ConstructFrame? return NS_ERROR_FAILURE; } return NS_OK; } static PRBool CheckOverflow(nsPresContext* aPresContext, const nsStyleDisplay* aDisplay) { if (aDisplay->mOverflowX == NS_STYLE_OVERFLOW_VISIBLE) return PR_FALSE; if (aDisplay->mOverflowX == NS_STYLE_OVERFLOW_CLIP) aPresContext->SetViewportOverflowOverride(NS_STYLE_OVERFLOW_HIDDEN, NS_STYLE_OVERFLOW_HIDDEN); else aPresContext->SetViewportOverflowOverride(aDisplay->mOverflowX, aDisplay->mOverflowY); return PR_TRUE; } /** * This checks the root element and the HTML BODY, if any, for an "overflow" property * that should be applied to the viewport. If one is found then we return the * element that we took the overflow from (which should then be treated as * "overflow:visible"), and we store the overflow style in the prescontext. * @return if scroll was propagated from some content node, the content node it * was propagated from. */ nsIContent* nsCSSFrameConstructor::PropagateScrollToViewport() { // Set default nsPresContext* presContext = mPresShell->GetPresContext(); presContext->SetViewportOverflowOverride(NS_STYLE_OVERFLOW_AUTO, NS_STYLE_OVERFLOW_AUTO); // We never mess with the viewport scroll state // when printing or in print preview if (presContext->IsPaginated()) { return nsnull; } nsIContent* docElement = mDocument->GetRootContent(); // Check the style on the document root element nsStyleSet *styleSet = mPresShell->StyleSet(); nsRefPtr rootStyle; rootStyle = styleSet->ResolveStyleFor(docElement, nsnull); if (!rootStyle) { return nsnull; } if (CheckOverflow(presContext, rootStyle->GetStyleDisplay())) { // tell caller we stole the overflow style from the root element return docElement; } // Don't look in the BODY for non-HTML documents or HTML documents // with non-HTML roots // XXX this should be earlier; we shouldn't even look at the document root // for non-HTML documents. Fix this once we support explicit CSS styling // of the viewport // XXX what about XHTML? nsCOMPtr htmlDoc(do_QueryInterface(mDocument)); if (!htmlDoc || !docElement->IsNodeOfType(nsINode::eHTML)) { return nsnull; } nsCOMPtr body; htmlDoc->GetBody(getter_AddRefs(body)); nsCOMPtr bodyElement = do_QueryInterface(body); if (!bodyElement || !bodyElement->NodeInfo()->Equals(nsGkAtoms::body)) { // The body is not a tag, it's a . return nsnull; } nsRefPtr bodyStyle; bodyStyle = styleSet->ResolveStyleFor(bodyElement, rootStyle); if (!bodyStyle) { return nsnull; } if (CheckOverflow(presContext, bodyStyle->GetStyleDisplay())) { // tell caller we stole the overflow style from the body element return bodyElement; } return nsnull; } /** * New one */ nsresult nsCSSFrameConstructor::ConstructDocElementFrame(nsFrameConstructorState& aState, nsIContent* aDocElement, nsIFrame* aParentFrame, nsIFrame** aNewFrame) { // how the root frame hierarchy should look /* ---------------No Scrollbars------ AreaFrame or BoxFrame (InitialContainingBlock) ---------------Gfx Scrollbars ------ ScrollFrame ^ | | AreaFrame or BoxFrame (InitialContainingBlock) */ *aNewFrame = nsnull; if (!mTempFrameTreeState) aState.mPresShell->CaptureHistoryState(getter_AddRefs(mTempFrameTreeState)); // ----- reattach gfx scrollbars ------ // Gfx scrollframes were created in the root frame but the primary frame map may have been destroyed if a // new style sheet was loaded so lets reattach the frames to their content. // XXX this seems truly bogus, we wipe out mGfxScrollFrame below if (mGfxScrollFrame) { nsIFrame* gfxScrollbarFrame1 = mGfxScrollFrame->GetFirstChild(nsnull); if (gfxScrollbarFrame1) { // XXX This works, but why? aState.mFrameManager-> SetPrimaryFrameFor(gfxScrollbarFrame1->GetContent(), gfxScrollbarFrame1); nsIFrame* gfxScrollbarFrame2 = gfxScrollbarFrame1->GetNextSibling(); if (gfxScrollbarFrame2) { // XXX This works, but why? aState.mFrameManager-> SetPrimaryFrameFor(gfxScrollbarFrame2->GetContent(), gfxScrollbarFrame2); } } } // --------- CREATE AREA OR BOX FRAME ------- nsRefPtr styleContext; styleContext = mPresShell->StyleSet()->ResolveStyleFor(aDocElement, nsnull); const nsStyleDisplay* display = styleContext->GetStyleDisplay(); // Ensure that our XBL bindings are installed. if (display->mBinding) { // Get the XBL loader. nsresult rv; PRBool resolveStyle; nsIXBLService * xblService = GetXBLService(); if (!xblService) return NS_ERROR_FAILURE; nsRefPtr binding; rv = xblService->LoadBindings(aDocElement, display->mBinding->mURI, display->mBinding->mOriginPrincipal, PR_FALSE, getter_AddRefs(binding), &resolveStyle); if (NS_FAILED(rv)) return NS_OK; // Binding will load asynchronously. if (binding) { mDocument->BindingManager()->AddToAttachedQueue(binding); } if (resolveStyle) { styleContext = mPresShell->StyleSet()->ResolveStyleFor(aDocElement, nsnull); display = styleContext->GetStyleDisplay(); } } // --------- IF SCROLLABLE WRAP IN SCROLLFRAME -------- #ifdef DEBUG PRBool propagatedScrollToViewport = PropagateScrollToViewport() == aDocElement; NS_ASSERTION(!display->IsScrollableOverflow() || aState.mPresContext->IsPaginated() || propagatedScrollToViewport, "Scrollbars should have been propagated to the viewport"); #endif nsIFrame* contentFrame = nsnull; PRBool isBlockFrame = PR_FALSE; nsresult rv; // The rules from CSS 2.1, section 9.2.4, have already been applied // by the style system, so we can assume that display->mDisplay is // either NONE, BLOCK, or TABLE. PRBool docElemIsTable = (display->mDisplay == NS_STYLE_DISPLAY_TABLE) && !IsSpecialContent(aDocElement, aDocElement->Tag(), aDocElement->GetNameSpaceID(), styleContext); if (docElemIsTable) { // if the document is a table then just populate it. rv = ConstructDocElementTableFrame(aDocElement, aParentFrame, &contentFrame, aState); if (NS_FAILED(rv)) { return rv; } styleContext = contentFrame->GetStyleContext(); } else { // otherwise build a box or a block #ifdef MOZ_XUL if (aDocElement->IsNodeOfType(nsINode::eXUL)) { contentFrame = NS_NewDocElementBoxFrame(mPresShell, styleContext); } else #endif #ifdef MOZ_SVG if (aDocElement->GetNameSpaceID() == kNameSpaceID_SVG) { if (aDocElement->Tag() == nsGkAtoms::svg && NS_SVGEnabled()) { contentFrame = NS_NewSVGOuterSVGFrame(mPresShell, aDocElement, styleContext); } else { return NS_ERROR_FAILURE; } } else #endif { contentFrame = NS_NewDocumentElementFrame(mPresShell, styleContext); isBlockFrame = PR_TRUE; } if (NS_UNLIKELY(!contentFrame)) { return NS_ERROR_OUT_OF_MEMORY; } // initialize the child InitAndRestoreFrame(aState, aDocElement, aParentFrame, nsnull, contentFrame); } // set the primary frame aState.mFrameManager->SetPrimaryFrameFor(aDocElement, contentFrame); *aNewFrame = contentFrame; mInitialContainingBlock = contentFrame; mInitialContainingBlockIsAbsPosContainer = PR_FALSE; // if it was a table then we don't need to process our children. if (!docElemIsTable) { // Process the child content nsFrameConstructorSaveState absoluteSaveState; nsFrameConstructorSaveState floatSaveState; nsFrameItems childItems; if (isBlockFrame) { PRBool haveFirstLetterStyle, haveFirstLineStyle; ShouldHaveSpecialBlockStyle(aDocElement, styleContext, &haveFirstLetterStyle, &haveFirstLineStyle); mInitialContainingBlockIsAbsPosContainer = PR_TRUE; aState.PushAbsoluteContainingBlock(contentFrame, absoluteSaveState); aState.PushFloatContainingBlock(contentFrame, floatSaveState, haveFirstLetterStyle, haveFirstLineStyle); } // Create any anonymous frames the doc element frame requires // This must happen before ProcessChildren to ensure that popups are // never constructed before the popupset. CreateAnonymousFrames(nsnull, aState, aDocElement, contentFrame, PR_FALSE, childItems, PR_TRUE); ProcessChildren(aState, aDocElement, contentFrame, PR_TRUE, childItems, isBlockFrame); // Set the initial child lists contentFrame->SetInitialChildList(nsnull, childItems.childList); } return NS_OK; } nsresult nsCSSFrameConstructor::ConstructRootFrame(nsIContent* aDocElement, nsIFrame** aNewFrame) { AUTO_LAYOUT_PHASE_ENTRY_POINT(mPresShell->GetPresContext(), FrameC); NS_PRECONDITION(aNewFrame, "null out param"); // how the root frame hierarchy should look /* ---------------No Scrollbars------ ViewPortFrame (FixedContainingBlock) <---- RootView ^ | RootFrame(DocElementContainingBlock) ---------------Gfx Scrollbars ------ ViewPortFrame (FixedContainingBlock) <---- RootView ^ | ScrollFrame ^ | RootFrame(DocElementContainingBlock) */ // Set up our style rule observer. { mPresShell->StyleSet()->SetBindingManager(mDocument->BindingManager()); } // --------- BUILD VIEWPORT ----------- nsIFrame* viewportFrame = nsnull; nsRefPtr viewportPseudoStyle; nsStyleSet *styleSet = mPresShell->StyleSet(); viewportPseudoStyle = styleSet->ResolvePseudoStyleFor(nsnull, nsCSSAnonBoxes::viewport, nsnull); viewportFrame = NS_NewViewportFrame(mPresShell, viewportPseudoStyle); nsPresContext* presContext = mPresShell->GetPresContext(); // XXXbz do we _have_ to pass a null content pointer to that frame? // Would it really kill us to pass in the root element or something? // What would that break? viewportFrame->Init(nsnull, nsnull, nsnull); // Bind the viewport frame to the root view nsIViewManager* viewManager = mPresShell->GetViewManager(); nsIView* rootView; viewManager->GetRootView(rootView); viewportFrame->SetView(rootView); nsContainerFrame::SyncFrameViewProperties(presContext, viewportFrame, viewportPseudoStyle, rootView); // The viewport is the containing block for 'fixed' elements mFixedContainingBlock = viewportFrame; // --------- CREATE ROOT FRAME ------- // Create the root frame. The document element's frame is a child of the // root frame. // // The root frame serves two purposes: // - reserves space for any margins needed for the document element's frame // - renders the document element's background. This ensures the background covers // the entire canvas as specified by the CSS2 spec PRBool isPaginated = presContext->IsRootPaginatedDocument(); nsIFrame* rootFrame = nsnull; nsIAtom* rootPseudo; if (!isPaginated) { #ifdef MOZ_XUL if (aDocElement->IsNodeOfType(nsINode::eXUL)) { // pass a temporary stylecontext, the correct one will be set later rootFrame = NS_NewRootBoxFrame(mPresShell, viewportPseudoStyle); } else #endif { // pass a temporary stylecontext, the correct one will be set later rootFrame = NS_NewCanvasFrame(mPresShell, viewportPseudoStyle); } rootPseudo = nsCSSAnonBoxes::canvas; mDocElementContainingBlock = rootFrame; } else { // Create a page sequence frame rootFrame = NS_NewSimplePageSequenceFrame(mPresShell, viewportPseudoStyle); mPageSequenceFrame = rootFrame; rootPseudo = nsCSSAnonBoxes::pageSequence; } // --------- IF SCROLLABLE WRAP IN SCROLLFRAME -------- // If the device supports scrolling (e.g., in galley mode on the screen and // for print-preview, but not when printing), then create a scroll frame that // will act as the scrolling mechanism for the viewport. // XXX Do we even need a viewport when printing to a printer? // As long as the webshell doesn't prohibit it, and the device supports // it, create a scroll frame that will act as the scolling mechanism for // the viewport. // // Threre are three possible values stored in the docshell: // 1) nsIScrollable::Scrollbar_Never = no scrollbars // 2) nsIScrollable::Scrollbar_Auto = scrollbars appear if needed // 3) nsIScrollable::Scrollbar_Always = scrollbars always // Only need to create a scroll frame/view for cases 2 and 3. PRBool isHTML = aDocElement->IsNodeOfType(nsINode::eHTML); PRBool isXUL = PR_FALSE; if (!isHTML) { isXUL = aDocElement->IsNodeOfType(nsINode::eXUL); } // Never create scrollbars for XUL documents PRBool isScrollable = !isXUL; // Never create scrollbars for frameset documents. if (isHTML) { nsCOMPtr htmlDoc = do_QueryInterface(mDocument); if (htmlDoc && htmlDoc->GetIsFrameset()) isScrollable = PR_FALSE; } if (isPaginated) { isScrollable = presContext->HasPaginatedScrolling(); } // We no longer need to do overflow propagation here. It's taken care of // when we construct frames for the element whose overflow might be // propagated NS_ASSERTION(!isScrollable || !isXUL, "XUL documents should never be scrollable - see above"); nsIFrame* newFrame = rootFrame; nsRefPtr rootPseudoStyle; // we must create a state because if the scrollbars are GFX it needs the // state to build the scrollbar frames. nsFrameConstructorState state(mPresShell, nsnull, nsnull, nsnull); nsIFrame* parentFrame = viewportFrame; // If paginated, make sure we don't put scrollbars in if (!isScrollable) { rootPseudoStyle = styleSet->ResolvePseudoStyleFor(nsnull, rootPseudo, viewportPseudoStyle); } else { if (rootPseudo == nsCSSAnonBoxes::canvas) { rootPseudo = nsCSSAnonBoxes::scrolledCanvas; } else { NS_ASSERTION(rootPseudo == nsCSSAnonBoxes::pageSequence, "Unknown root pseudo"); rootPseudo = nsCSSAnonBoxes::scrolledPageSequence; } // Build the frame. We give it the content we are wrapping which is the document, // the root frame, the parent view port frame, and we should get back the new // frame and the scrollable view if one was created. // resolve a context for the scrollframe nsRefPtr styleContext; styleContext = styleSet->ResolvePseudoStyleFor(nsnull, nsCSSAnonBoxes::viewportScroll, viewportPseudoStyle); // Note that the viewport scrollframe is always built with // overflow:auto style. This forces the scroll frame to create // anonymous content for both scrollbars. This is necessary even // if the HTML or BODY elements are overriding the viewport // scroll style to 'hidden' --- dynamic style changes might put // scrollbars back on the viewport and we don't want to have to // reframe the viewport to create the scrollbar content. newFrame = nsnull; rootPseudoStyle = BeginBuildingScrollFrame( state, aDocElement, styleContext, viewportFrame, nsnull, rootPseudo, PR_TRUE, newFrame); nsIScrollableFrame* scrollable; CallQueryInterface(newFrame, &scrollable); NS_ENSURE_TRUE(scrollable, NS_ERROR_FAILURE); nsIScrollableView* scrollableView = scrollable->GetScrollableView(); NS_ENSURE_TRUE(scrollableView, NS_ERROR_FAILURE); viewManager->SetRootScrollableView(scrollableView); parentFrame = newFrame; mGfxScrollFrame = newFrame; } rootFrame->SetStyleContextWithoutNotification(rootPseudoStyle); rootFrame->Init(aDocElement, parentFrame, nsnull); if (isScrollable) { FinishBuildingScrollFrame(parentFrame, rootFrame); } if (isPaginated) { // paginated // Create the first page // Set the initial child lists nsIFrame *pageFrame, *pageContentFrame; ConstructPageFrame(mPresShell, presContext, rootFrame, nsnull, pageFrame, pageContentFrame); rootFrame->SetInitialChildList(nsnull, pageFrame); // The eventual parent of the document element frame. // XXX should this be set for every new page (in ConstructPageFrame)? mDocElementContainingBlock = pageContentFrame; } viewportFrame->SetInitialChildList(nsnull, newFrame); *aNewFrame = viewportFrame; return NS_OK; } nsresult nsCSSFrameConstructor::ConstructPageFrame(nsIPresShell* aPresShell, nsPresContext* aPresContext, nsIFrame* aParentFrame, nsIFrame* aPrevPageFrame, nsIFrame*& aPageFrame, nsIFrame*& aPageContentFrame) { nsStyleContext* parentStyleContext = aParentFrame->GetStyleContext(); nsStyleSet *styleSet = aPresShell->StyleSet(); nsRefPtr pagePseudoStyle; pagePseudoStyle = styleSet->ResolvePseudoStyleFor(nsnull, nsCSSAnonBoxes::page, parentStyleContext); aPageFrame = NS_NewPageFrame(aPresShell, pagePseudoStyle); if (NS_UNLIKELY(!aPageFrame)) return NS_ERROR_OUT_OF_MEMORY; // Initialize the page frame and force it to have a view. This makes printing of // the pages easier and faster. aPageFrame->Init(nsnull, aParentFrame, aPrevPageFrame); nsRefPtr pageContentPseudoStyle; pageContentPseudoStyle = styleSet->ResolvePseudoStyleFor(nsnull, nsCSSAnonBoxes::pageContent, pagePseudoStyle); aPageContentFrame = NS_NewPageContentFrame(aPresShell, pageContentPseudoStyle); if (NS_UNLIKELY(!aPageContentFrame)) return NS_ERROR_OUT_OF_MEMORY; // Initialize the page content frame and force it to have a view. Also make it the // containing block for fixed elements which are repeated on every page. nsIFrame* prevPageContentFrame = nsnull; if (aPrevPageFrame) { prevPageContentFrame = aPrevPageFrame->GetFirstChild(nsnull); NS_ASSERTION(prevPageContentFrame, "missing page content frame"); } aPageContentFrame->Init(nsnull, aPageFrame, prevPageContentFrame); mFixedContainingBlock = aPageContentFrame; aPageFrame->SetInitialChildList(nsnull, aPageContentFrame); return NS_OK; } /* static */ nsresult nsCSSFrameConstructor::CreatePlaceholderFrameFor(nsIPresShell* aPresShell, nsIContent* aContent, nsIFrame* aFrame, nsStyleContext* aStyleContext, nsIFrame* aParentFrame, nsIFrame* aPrevInFlow, nsIFrame** aPlaceholderFrame) { nsRefPtr placeholderStyle = aPresShell->StyleSet()-> ResolveStyleForNonElement(aStyleContext->GetParent()); // The placeholder frame gets a pseudo style context nsPlaceholderFrame* placeholderFrame = (nsPlaceholderFrame*)NS_NewPlaceholderFrame(aPresShell, placeholderStyle); if (placeholderFrame) { placeholderFrame->Init(aContent, aParentFrame, aPrevInFlow); // The placeholder frame has a pointer back to the out-of-flow frame placeholderFrame->SetOutOfFlowFrame(aFrame); aFrame->AddStateBits(NS_FRAME_OUT_OF_FLOW); // Add mapping from absolutely positioned frame to its placeholder frame aPresShell->FrameManager()->RegisterPlaceholderFrame(placeholderFrame); *aPlaceholderFrame = static_cast(placeholderFrame); return NS_OK; } else { return NS_ERROR_OUT_OF_MEMORY; } } nsresult nsCSSFrameConstructor::ConstructRadioControlFrame(nsIFrame** aNewFrame, nsIContent* aContent, nsStyleContext* aStyleContext) { *aNewFrame = NS_NewGfxRadioControlFrame(mPresShell, aStyleContext); if (NS_UNLIKELY(!*aNewFrame)) { return NS_ERROR_OUT_OF_MEMORY; } nsRefPtr radioStyle; radioStyle = mPresShell->StyleSet()->ResolvePseudoStyleFor(aContent, nsCSSAnonBoxes::radio, aStyleContext); nsIRadioControlFrame* radio = nsnull; if (*aNewFrame && NS_SUCCEEDED(CallQueryInterface(*aNewFrame, &radio))) { radio->SetRadioButtonFaceStyleContext(radioStyle); } return NS_OK; } nsresult nsCSSFrameConstructor::ConstructCheckboxControlFrame(nsIFrame** aNewFrame, nsIContent* aContent, nsStyleContext* aStyleContext) { *aNewFrame = NS_NewGfxCheckboxControlFrame(mPresShell, aStyleContext); if (NS_UNLIKELY(!*aNewFrame)) { return NS_ERROR_OUT_OF_MEMORY; } nsRefPtr checkboxStyle; checkboxStyle = mPresShell->StyleSet()->ResolvePseudoStyleFor(aContent, nsCSSAnonBoxes::check, aStyleContext); nsICheckboxControlFrame* checkbox = nsnull; if (*aNewFrame && NS_SUCCEEDED(CallQueryInterface(*aNewFrame, &checkbox))) { checkbox->SetCheckboxFaceStyleContext(checkboxStyle); } return NS_OK; } nsresult nsCSSFrameConstructor::ConstructButtonFrame(nsFrameConstructorState& aState, nsIContent* aContent, nsIFrame* aParentFrame, nsIAtom* aTag, nsStyleContext* aStyleContext, nsIFrame** aNewFrame, const nsStyleDisplay* aStyleDisplay, nsFrameItems& aFrameItems, PRBool aHasPseudoParent) { if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) { ProcessPseudoFrames(aState, aFrameItems); } *aNewFrame = nsnull; nsIFrame* buttonFrame = nsnull; if (nsGkAtoms::button == aTag) { buttonFrame = NS_NewHTMLButtonControlFrame(mPresShell, aStyleContext); } else { buttonFrame = NS_NewGfxButtonControlFrame(mPresShell, aStyleContext); } if (NS_UNLIKELY(!buttonFrame)) { return NS_ERROR_OUT_OF_MEMORY; } // Initialize the button frame nsresult rv = InitAndRestoreFrame(aState, aContent, aState.GetGeometricParent(aStyleDisplay, aParentFrame), nsnull, buttonFrame); if (NS_FAILED(rv)) { buttonFrame->Destroy(); return rv; } // See if we need to create a view, e.g. the frame is absolutely positioned nsHTMLContainerFrame::CreateViewForFrame(buttonFrame, aParentFrame, PR_FALSE); nsRefPtr styleContext; styleContext = mPresShell->StyleSet()->ResolvePseudoStyleFor(aContent, nsCSSAnonBoxes::buttonContent, aStyleContext); nsIFrame* areaFrame = NS_NewAreaFrame(mPresShell, styleContext, NS_BLOCK_SPACE_MGR); if (NS_UNLIKELY(!areaFrame)) { buttonFrame->Destroy(); return NS_ERROR_OUT_OF_MEMORY; } rv = InitAndRestoreFrame(aState, aContent, buttonFrame, nsnull, areaFrame); if (NS_FAILED(rv)) { areaFrame->Destroy(); buttonFrame->Destroy(); return rv; } rv = aState.AddChild(buttonFrame, aFrameItems, aContent, aStyleContext, aParentFrame); if (NS_FAILED(rv)) { areaFrame->Destroy(); buttonFrame->Destroy(); return rv; } if (!buttonFrame->IsLeaf()) { // input type="button" have only anonymous content // The area frame is a float container PRBool haveFirstLetterStyle, haveFirstLineStyle; ShouldHaveSpecialBlockStyle(aContent, aStyleContext, &haveFirstLetterStyle, &haveFirstLineStyle); nsFrameConstructorSaveState floatSaveState; aState.PushFloatContainingBlock(areaFrame, floatSaveState, haveFirstLetterStyle, haveFirstLineStyle); // Process children nsFrameConstructorSaveState absoluteSaveState; nsFrameItems childItems; if (aStyleDisplay->IsPositioned()) { // The area frame becomes a container for child frames that are // absolutely positioned aState.PushAbsoluteContainingBlock(areaFrame, absoluteSaveState); } rv = ProcessChildren(aState, aContent, areaFrame, PR_TRUE, childItems, buttonFrame->GetStyleDisplay()->IsBlockOutside()); if (NS_FAILED(rv)) return rv; // Set the areas frame's initial child lists areaFrame->SetInitialChildList(nsnull, childItems.childList); } buttonFrame->SetInitialChildList(nsnull, areaFrame); nsFrameItems anonymousChildItems; // if there are any anonymous children create frames for them CreateAnonymousFrames(aTag, aState, aContent, buttonFrame, PR_FALSE, anonymousChildItems); if (anonymousChildItems.childList) { // the anonymous content is already parented to the area frame aState.mFrameManager->AppendFrames(areaFrame, nsnull, anonymousChildItems.childList); } // our new button frame returned is the top frame. *aNewFrame = buttonFrame; return NS_OK; } nsresult nsCSSFrameConstructor::ConstructSelectFrame(nsFrameConstructorState& aState, nsIContent* aContent, nsIFrame* aParentFrame, nsIAtom* aTag, nsStyleContext* aStyleContext, nsIFrame*& aNewFrame, const nsStyleDisplay* aStyleDisplay, PRBool& aFrameHasBeenInitialized, nsFrameItems& aFrameItems) { nsresult rv = NS_OK; const PRInt32 kNoSizeSpecified = -1; // Construct a frame-based listbox or combobox nsCOMPtr sel(do_QueryInterface(aContent)); PRInt32 size = 1; if (sel) { sel->GetSize(&size); PRBool multipleSelect = PR_FALSE; sel->GetMultiple(&multipleSelect); // Construct a combobox if size=1 or no size is specified and its multiple select if (((1 == size || 0 == size) || (kNoSizeSpecified == size)) && (PR_FALSE == multipleSelect)) { // Construct a frame-based combo box. // The frame-based combo box is built out of three parts. A display area, a button and // a dropdown list. The display area and button are created through anonymous content. // The drop-down list's frame is created explicitly. The combobox frame shares its content // with the drop-down list. PRUint32 flags = NS_BLOCK_SPACE_MGR; nsIFrame* comboboxFrame = NS_NewComboboxControlFrame(mPresShell, aStyleContext, flags); // Save the history state so we don't restore during construction // since the complete tree is required before we restore. nsILayoutHistoryState *historyState = aState.mFrameState; aState.mFrameState = nsnull; // Initialize the combobox frame InitAndRestoreFrame(aState, aContent, aState.GetGeometricParent(aStyleDisplay, aParentFrame), nsnull, comboboxFrame); nsHTMLContainerFrame::CreateViewForFrame(comboboxFrame, aParentFrame, PR_FALSE); rv = aState.AddChild(comboboxFrame, aFrameItems, aContent, aStyleContext, aParentFrame); if (NS_FAILED(rv)) { return rv; } /////////////////////////////////////////////////////////////////// // Combobox - Old Native Implementation /////////////////////////////////////////////////////////////////// nsIComboboxControlFrame* comboBox = nsnull; CallQueryInterface(comboboxFrame, &comboBox); NS_ASSERTION(comboBox, "NS_NewComboboxControlFrame returned frame that " "doesn't implement nsIComboboxControlFrame"); // Resolve pseudo element style for the dropdown list nsRefPtr listStyle; listStyle = mPresShell->StyleSet()->ResolvePseudoStyleFor(aContent, nsCSSAnonBoxes::dropDownList, aStyleContext); // Create a listbox nsIFrame* listFrame = NS_NewListControlFrame(mPresShell, listStyle); // Notify the listbox that it is being used as a dropdown list. nsIListControlFrame * listControlFrame; rv = CallQueryInterface(listFrame, &listControlFrame); if (NS_SUCCEEDED(rv)) { listControlFrame->SetComboboxFrame(comboboxFrame); } // Notify combobox that it should use the listbox as it's popup comboBox->SetDropDown(listFrame); NS_ASSERTION(!listStyle->GetStyleDisplay()->IsPositioned(), "Ended up with positioned dropdown list somehow."); NS_ASSERTION(!listStyle->GetStyleDisplay()->IsFloating(), "Ended up with floating dropdown list somehow."); // Initialize the scroll frame positioned. Note that it is NOT // initialized as absolutely positioned. nsIFrame* scrolledFrame = NS_NewSelectsAreaFrame(mPresShell, aStyleContext, flags); InitializeSelectFrame(aState, listFrame, scrolledFrame, aContent, comboboxFrame, listStyle, PR_TRUE, aFrameItems); // Set flag so the events go to the listFrame not child frames. // XXX: We should replace this with a real widget manager similar // to how the nsFormControlFrame works. Re-directing events is a temporary Kludge. NS_ASSERTION(listFrame->GetView(), "ListFrame's view is nsnull"); //listFrame->GetView()->SetViewFlags(NS_VIEW_PUBLIC_FLAG_DONT_CHECK_CHILDREN); // Create display and button frames from the combobox's anonymous content. // The anonymous content is appended to existing anonymous content for this // element (the scrollbars). nsFrameItems childItems; CreateAnonymousFrames(nsGkAtoms::combobox, aState, aContent, comboboxFrame, PR_TRUE, childItems); comboboxFrame->SetInitialChildList(nsnull, childItems.childList); // Initialize the additional popup child list which contains the // dropdown list frame. nsFrameItems popupItems; popupItems.AddChild(listFrame); comboboxFrame->SetInitialChildList(nsGkAtoms::selectPopupList, popupItems.childList); aNewFrame = comboboxFrame; aFrameHasBeenInitialized = PR_TRUE; aState.mFrameState = historyState; if (aState.mFrameState && aState.mFrameManager) { // Restore frame state for the entire subtree of |comboboxFrame|. aState.mFrameManager->RestoreFrameState(comboboxFrame, aState.mFrameState); } } else { /////////////////////////////////////////////////////////////////// // ListBox - Old Native Implementation /////////////////////////////////////////////////////////////////// nsIFrame* listFrame = NS_NewListControlFrame(mPresShell, aStyleContext); if (listFrame) { rv = NS_OK; } else { rv = NS_ERROR_OUT_OF_MEMORY; } nsIFrame* scrolledFrame = NS_NewSelectsAreaFrame( mPresShell, aStyleContext, NS_BLOCK_SPACE_MGR); // ******* this code stolen from Initialze ScrollFrame ******** // please adjust this code to use BuildScrollFrame. InitializeSelectFrame(aState, listFrame, scrolledFrame, aContent, aParentFrame, aStyleContext, PR_FALSE, aFrameItems); aNewFrame = listFrame; aFrameHasBeenInitialized = PR_TRUE; } } return rv; } /** * Used to be InitializeScrollFrame but now it's only used for the select tag * But the select tag should really be fixed to use GFX scrollbars that can * be create with BuildScrollFrame. */ nsresult nsCSSFrameConstructor::InitializeSelectFrame(nsFrameConstructorState& aState, nsIFrame* scrollFrame, nsIFrame* scrolledFrame, nsIContent* aContent, nsIFrame* aParentFrame, nsStyleContext* aStyleContext, PRBool aBuildCombobox, nsFrameItems& aFrameItems) { const nsStyleDisplay* display = aStyleContext->GetStyleDisplay(); // Initialize it nsIFrame* geometricParent = aState.GetGeometricParent(display, aParentFrame); // We don't call InitAndRestoreFrame for scrollFrame because we can only // restore the frame state after its parts have been created (in particular, // the scrollable view). So we have to split Init and Restore. // Initialize the frame scrollFrame->Init(aContent, geometricParent, nsnull); if (!aBuildCombobox) { nsresult rv = aState.AddChild(scrollFrame, aFrameItems, aContent, aStyleContext, aParentFrame); if (NS_FAILED(rv)) { return rv; } } nsHTMLContainerFrame::CreateViewForFrame(scrollFrame, aParentFrame, aBuildCombobox); if (aBuildCombobox) { // Give the drop-down list a popup widget nsIView* view = scrollFrame->GetView(); NS_ASSERTION(view, "We asked for a view but didn't get one"); if (view) { view->GetViewManager()->SetViewFloating(view, PR_TRUE); nsWidgetInitData widgetData; widgetData.mWindowType = eWindowType_popup; widgetData.mBorderStyle = eBorderStyle_default; #if defined(XP_MACOSX) || defined(XP_BEOS) static NS_DEFINE_IID(kCPopUpCID, NS_POPUP_CID); view->CreateWidget(kCPopUpCID, &widgetData, nsnull); #else static NS_DEFINE_IID(kCChildCID, NS_CHILD_CID); view->CreateWidget(kCChildCID, &widgetData, nsnull); #endif } } nsStyleContext* scrolledPseudoStyle; BuildScrollFrame(aState, aContent, aStyleContext, scrolledFrame, geometricParent, aParentFrame, scrollFrame, scrolledPseudoStyle); if (aState.mFrameState && aState.mFrameManager) { // Restore frame state for the scroll frame aState.mFrameManager->RestoreFrameStateFor(scrollFrame, aState.mFrameState); } // The area frame is a float container PRBool haveFirstLetterStyle, haveFirstLineStyle; ShouldHaveSpecialBlockStyle(aContent, aStyleContext, &haveFirstLetterStyle, &haveFirstLineStyle); nsFrameConstructorSaveState floatSaveState; aState.PushFloatContainingBlock(scrolledFrame, floatSaveState, haveFirstLetterStyle, haveFirstLineStyle); // Process children nsFrameConstructorSaveState absoluteSaveState; nsFrameItems childItems; if (display->IsPositioned()) { // The area frame becomes a container for child frames that are // absolutely positioned aState.PushAbsoluteContainingBlock(scrolledFrame, absoluteSaveState); } ProcessChildren(aState, aContent, scrolledFrame, PR_FALSE, childItems, PR_TRUE); // Set the scrolled frame's initial child lists scrolledFrame->SetInitialChildList(nsnull, childItems.childList); return NS_OK; } nsresult nsCSSFrameConstructor::ConstructFieldSetFrame(nsFrameConstructorState& aState, nsIContent* aContent, nsIFrame* aParentFrame, nsIAtom* aTag, nsStyleContext* aStyleContext, nsIFrame*& aNewFrame, nsFrameItems& aFrameItems, const nsStyleDisplay* aStyleDisplay, PRBool& aFrameHasBeenInitialized) { nsIFrame* newFrame = NS_NewFieldSetFrame(mPresShell, aStyleContext); if (NS_UNLIKELY(!newFrame)) { return NS_ERROR_OUT_OF_MEMORY; } // Initialize it InitAndRestoreFrame(aState, aContent, aState.GetGeometricParent(aStyleDisplay, aParentFrame), nsnull, newFrame); // See if we need to create a view, e.g. the frame is absolutely // positioned nsHTMLContainerFrame::CreateViewForFrame(newFrame, aParentFrame, PR_FALSE); // Resolve style and initialize the frame nsRefPtr styleContext; styleContext = mPresShell->StyleSet()->ResolvePseudoStyleFor(aContent, nsCSSAnonBoxes::fieldsetContent, aStyleContext); nsIFrame* areaFrame = NS_NewAreaFrame(mPresShell, styleContext, NS_BLOCK_SPACE_MGR | NS_BLOCK_MARGIN_ROOT); InitAndRestoreFrame(aState, aContent, newFrame, nsnull, areaFrame); nsresult rv = aState.AddChild(newFrame, aFrameItems, aContent, aStyleContext, aParentFrame); if (NS_FAILED(rv)) { return rv; } // The area frame is a float container PRBool haveFirstLetterStyle, haveFirstLineStyle; ShouldHaveSpecialBlockStyle(aContent, aStyleContext, &haveFirstLetterStyle, &haveFirstLineStyle); nsFrameConstructorSaveState floatSaveState; aState.PushFloatContainingBlock(areaFrame, floatSaveState, haveFirstLetterStyle, haveFirstLineStyle); // Process children nsFrameConstructorSaveState absoluteSaveState; nsFrameItems childItems; if (aStyleDisplay->IsPositioned()) { // The area frame becomes a container for child frames that are // absolutely positioned aState.PushAbsoluteContainingBlock(areaFrame, absoluteSaveState); } ProcessChildren(aState, aContent, areaFrame, PR_TRUE, childItems, PR_TRUE); static NS_DEFINE_IID(kLegendFrameCID, NS_LEGEND_FRAME_CID); nsIFrame * child = childItems.childList; nsIFrame * previous = nsnull; nsIFrame* legendFrame = nsnull; while (nsnull != child) { nsresult result = child->QueryInterface(kLegendFrameCID, (void**)&legendFrame); if (NS_SUCCEEDED(result) && legendFrame) { // We want the legend to be the first frame in the fieldset child list. // That way the EventStateManager will do the right thing when tabbing // from a selection point within the legend (bug 236071), which is // used for implementing legend access keys (bug 81481). // GetAdjustedParentFrame() below depends on this frame order. if (nsnull != previous) { previous->SetNextSibling(legendFrame->GetNextSibling()); } else { childItems.childList = legendFrame->GetNextSibling(); } legendFrame->SetNextSibling(areaFrame); legendFrame->SetParent(newFrame); break; } previous = child; child = child->GetNextSibling(); } // Set the scrolled frame's initial child lists areaFrame->SetInitialChildList(nsnull, childItems.childList); // Set the scroll frame's initial child list newFrame->SetInitialChildList(nsnull, legendFrame ? legendFrame : areaFrame); // our new frame returned is the top frame which is the list frame. aNewFrame = newFrame; // yes we have already initialized our frame aFrameHasBeenInitialized = PR_TRUE; return NS_OK; } nsresult nsCSSFrameConstructor::ConstructTextFrame(nsFrameConstructorState& aState, nsIContent* aContent, nsIFrame* aParentFrame, nsStyleContext* aStyleContext, nsFrameItems& aFrameItems, PRBool aPseudoParent) { // process pending pseudo frames. whitespace doesn't have an effect. if (!aPseudoParent && !aState.mPseudoFrames.IsEmpty() && !TextIsOnlyWhitespace(aContent)) ProcessPseudoFrames(aState, aFrameItems); nsIFrame* newFrame = nsnull; #ifdef MOZ_SVG if (aParentFrame->IsFrameOfType(nsIFrame::eSVG)) { nsIFrame *ancestorFrame = SVG_GetFirstNonAAncestorFrame(aParentFrame); if (ancestorFrame) { nsISVGTextContentMetrics* metrics; CallQueryInterface(ancestorFrame, &metrics); if (!metrics) { return NS_OK; } newFrame = NS_NewSVGGlyphFrame(mPresShell, aContent, ancestorFrame, aStyleContext); } } else { newFrame = NS_NewTextFrame(mPresShell, aStyleContext); } #else newFrame = NS_NewTextFrame(mPresShell, aStyleContext); #endif if (NS_UNLIKELY(!newFrame)) return NS_ERROR_OUT_OF_MEMORY; nsresult rv = InitAndRestoreFrame(aState, aContent, aParentFrame, nsnull, newFrame); if (NS_FAILED(rv)) { newFrame->Destroy(); return rv; } // We never need to create a view for a text frame. // Set the frame's initial child list to null. newFrame->SetInitialChildList(nsnull, nsnull); // Add the newly constructed frame to the flow aFrameItems.AddChild(newFrame); // Text frames don't go in the content->frame hash table, because // they're anonymous. This keeps the hash table smaller return rv; } nsresult nsCSSFrameConstructor::ConstructHTMLFrame(nsFrameConstructorState& aState, nsIContent* aContent, nsIFrame* aParentFrame, nsIAtom* aTag, PRInt32 aNameSpaceID, nsStyleContext* aStyleContext, nsFrameItems& aFrameItems, PRBool aHasPseudoParent) { // Ignore the tag if it's not HTML content and if it doesn't extend (via XBL) // a valid HTML namespace. if (!aContent->IsNodeOfType(nsINode::eHTML) && aNameSpaceID != kNameSpaceID_XHTML) { return NS_OK; } PRBool frameHasBeenInitialized = PR_FALSE; nsIFrame* newFrame = nsnull; // the frame we construct PRBool addToHashTable = PR_TRUE; PRBool isFloatContainer = PR_FALSE; PRBool addedToFrameList = PR_FALSE; nsresult rv = NS_OK; PRBool triedFrame = PR_FALSE; // See if the element is absolute or fixed positioned const nsStyleDisplay* display = aStyleContext->GetStyleDisplay(); // Create a frame based on the tag if (nsGkAtoms::img == aTag) { // Make sure to keep IsSpecialContent in synch with this code rv = CreateHTMLImageFrame(aContent, aStyleContext, NS_NewImageFrame, &newFrame); if (newFrame) { if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) { ProcessPseudoFrames(aState, aFrameItems); } } } else if (nsGkAtoms::br == aTag) { if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) { ProcessPseudoFrames(aState, aFrameItems); } newFrame = NS_NewBRFrame(mPresShell, aStyleContext); triedFrame = PR_TRUE; // BR frames don't go in the content->frame hash table: typically // there are many BR content objects and this would increase the size // of the hash table, and it's doubtful we need the mapping anyway addToHashTable = PR_FALSE; } else if (nsGkAtoms::wbr == aTag) { if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) { ProcessPseudoFrames(aState, aFrameItems); } newFrame = NS_NewWBRFrame(mPresShell, aStyleContext); triedFrame = PR_TRUE; } else if (nsGkAtoms::input == aTag) { // Make sure to keep IsSpecialContent in synch with this code rv = CreateInputFrame(aState, aContent, aParentFrame, aTag, aStyleContext, &newFrame, display, frameHasBeenInitialized, addedToFrameList, aFrameItems, aHasPseudoParent); if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty() && newFrame && !addedToFrameList) { // We'll still be adding this new frame, and it's a replaced // element, so process pseudo-frames now. ProcessPseudoFrames(aState, aFrameItems); } } else if (nsGkAtoms::textarea == aTag) { if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) { ProcessPseudoFrames(aState, aFrameItems); } newFrame = NS_NewTextControlFrame(mPresShell, aStyleContext); triedFrame = PR_TRUE; } else if (nsGkAtoms::select == aTag) { if (!gUseXBLForms) { if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) { ProcessPseudoFrames(aState, aFrameItems); } rv = ConstructSelectFrame(aState, aContent, aParentFrame, aTag, aStyleContext, newFrame, display, frameHasBeenInitialized, aFrameItems); if (newFrame) { NS_ASSERTION(nsPlaceholderFrame::GetRealFrameFor(aFrameItems.lastChild) == newFrame, "Frame didn't get added to aFrameItems?"); addedToFrameList = PR_TRUE; } } } else if (nsGkAtoms::object == aTag || nsGkAtoms::applet == aTag || nsGkAtoms::embed == aTag) { // Make sure to keep IsSpecialContent in synch with this code if (!(aContent->IntrinsicState() & (NS_EVENT_STATE_BROKEN | NS_EVENT_STATE_USERDISABLED | NS_EVENT_STATE_SUPPRESSED))) { if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) { ProcessPseudoFrames(aState, aFrameItems); } nsCOMPtr objContent(do_QueryInterface(aContent)); NS_ASSERTION(objContent, "applet, embed and object must implement nsIObjectLoadingContent!"); if (!objContent) { // XBL might trigger this... return NS_ERROR_UNEXPECTED; } PRUint32 type; objContent->GetDisplayedType(&type); if (type == nsIObjectLoadingContent::TYPE_LOADING) { // Ideally, this should show the standby attribute // XXX Should we return something that is replaced, or make // nsFrame replaced but not its subclasses? newFrame = NS_NewEmptyFrame(mPresShell, aStyleContext); } else if (type == nsIObjectLoadingContent::TYPE_PLUGIN) newFrame = NS_NewObjectFrame(mPresShell, aStyleContext); else if (type == nsIObjectLoadingContent::TYPE_IMAGE) newFrame = NS_NewImageFrame(mPresShell, aStyleContext); else if (type == nsIObjectLoadingContent::TYPE_DOCUMENT) newFrame = NS_NewSubDocumentFrame(mPresShell, aStyleContext); #ifdef DEBUG else NS_ERROR("Shouldn't get here if we're not broken and not " "suppressed and not blocked"); #endif triedFrame = PR_TRUE; } } else if (nsGkAtoms::fieldset == aTag) { if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) { ProcessPseudoFrames(aState, aFrameItems); } rv = ConstructFieldSetFrame(aState, aContent, aParentFrame, aTag, aStyleContext, newFrame, aFrameItems, display, frameHasBeenInitialized); NS_ASSERTION(nsPlaceholderFrame::GetRealFrameFor(aFrameItems.lastChild) == newFrame, "Frame didn't get added to aFrameItems?"); addedToFrameList = PR_TRUE; } else if (nsGkAtoms::legend == aTag) { NS_ASSERTION(!display->IsAbsolutelyPositioned() && !display->IsFloating(), "Legends should not be positioned and should not float"); if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) { ProcessPseudoFrames(aState, aFrameItems); } newFrame = NS_NewLegendFrame(mPresShell, aStyleContext); triedFrame = PR_TRUE; isFloatContainer = PR_TRUE; } else if (nsGkAtoms::frameset == aTag) { NS_ASSERTION(!display->IsAbsolutelyPositioned() && !display->IsFloating(), "Framesets should not be positioned and should not float"); if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) { ProcessPseudoFrames(aState, aFrameItems); } newFrame = NS_NewHTMLFramesetFrame(mPresShell, aStyleContext); triedFrame = PR_TRUE; } else if (nsGkAtoms::iframe == aTag) { if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) { ProcessPseudoFrames(aState, aFrameItems); } newFrame = NS_NewSubDocumentFrame(mPresShell, aStyleContext); triedFrame = PR_TRUE; if (newFrame) { // the nsSubDocumentFrame needs to know about its content parent during ::Init. // there is no reasonable way to get the value there. // so we store it as a frame property. nsCOMPtr contentParentAtom = do_GetAtom("contentParent"); aState.mPresContext->PropertyTable()-> SetProperty(newFrame, contentParentAtom, aParentFrame, nsnull, nsnull); } } else if (nsGkAtoms::spacer == aTag) { NS_ASSERTION(!display->IsAbsolutelyPositioned() && !display->IsFloating(), "Spacers should not be positioned and should not float"); if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) { ProcessPseudoFrames(aState, aFrameItems); } newFrame = NS_NewSpacerFrame(mPresShell, aStyleContext); triedFrame = PR_TRUE; } else if (nsGkAtoms::button == aTag) { rv = ConstructButtonFrame(aState, aContent, aParentFrame, aTag, aStyleContext, &newFrame, display, aFrameItems, aHasPseudoParent); // the html4 button needs to act just like a // regular button except contain html content // so it must be replaced or html outside it will // draw into its borders. -EDV frameHasBeenInitialized = PR_TRUE; addedToFrameList = PR_TRUE; isFloatContainer = PR_TRUE; } else if (nsGkAtoms::isindex == aTag) { if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) { ProcessPseudoFrames(aState, aFrameItems); } newFrame = NS_NewIsIndexFrame(mPresShell, aStyleContext); triedFrame = PR_TRUE; } else if (nsGkAtoms::canvas == aTag) { if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) { ProcessPseudoFrames(aState, aFrameItems); } newFrame = NS_NewHTMLCanvasFrame(mPresShell, aStyleContext); triedFrame = PR_TRUE; } if (NS_UNLIKELY(triedFrame && !newFrame)) { return NS_ERROR_OUT_OF_MEMORY; } else if (NS_FAILED(rv) || !newFrame) { return rv; } // If we succeeded in creating a frame then initialize it, process its // children (if requested), and set the initial child list // Note: at this point we should construct kids for newFrame only if // it's not a leaf and hasn't been initialized yet. if (!frameHasBeenInitialized) { NS_ASSERTION(!addedToFrameList, "Frames that were already added to the frame list should be " "initialized by now!"); nsIFrame* geometricParent = aState.GetGeometricParent(display, aParentFrame); rv = InitAndRestoreFrame(aState, aContent, geometricParent, nsnull, newFrame); NS_ASSERTION(NS_SUCCEEDED(rv), "InitAndRestoreFrame failed"); // See if we need to create a view, e.g. the frame is absolutely // positioned nsHTMLContainerFrame::CreateViewForFrame(newFrame, aParentFrame, PR_FALSE); rv = aState.AddChild(newFrame, aFrameItems, aContent, aStyleContext, aParentFrame); if (NS_FAILED(rv)) { return rv; } addedToFrameList = PR_TRUE; // Process the child content if requested nsFrameItems childItems; nsFrameConstructorSaveState absoluteSaveState; nsFrameConstructorSaveState floatSaveState; if (!newFrame->IsLeaf()) { if (display->IsPositioned()) { aState.PushAbsoluteContainingBlock(newFrame, absoluteSaveState); } if (isFloatContainer) { PRBool haveFirstLetterStyle, haveFirstLineStyle; ShouldHaveSpecialBlockStyle(aContent, aStyleContext, &haveFirstLetterStyle, &haveFirstLineStyle); aState.PushFloatContainingBlock(newFrame, floatSaveState, PR_FALSE, PR_FALSE); } // Process the child frames rv = ProcessChildren(aState, aContent, newFrame, PR_TRUE, childItems, PR_FALSE); } // if there are any anonymous children create frames for them CreateAnonymousFrames(aTag, aState, aContent, newFrame, PR_FALSE, childItems); // Set the frame's initial child list if (childItems.childList) { newFrame->SetInitialChildList(nsnull, childItems.childList); } } if (!addedToFrameList) { // Gotta do it here. Note that things like absolutely positioned replaced // elements and the like will end up in this code. So use the AddChild // on the state. rv = aState.AddChild(newFrame, aFrameItems, aContent, aStyleContext, aParentFrame); if (NS_FAILED(rv)) { return rv; } } if (addToHashTable) { // Add a mapping from content object to primary frame. Note that for // floated and positioned frames this is the out-of-flow frame and not // the placeholder frame aState.mFrameManager->SetPrimaryFrameFor(aContent, newFrame); } return rv; } nsresult nsCSSFrameConstructor::CreateAnonymousFrames(nsIAtom* aTag, nsFrameConstructorState& aState, nsIContent* aParent, nsIFrame* aNewFrame, PRBool aAppendToExisting, nsFrameItems& aChildItems, PRBool aIsRoot) { // See if we might have anonymous content // by looking at the tag rather than doing a QueryInterface on // the frame. Only these tags' frames can have anonymous content // through nsIAnonymousContentCreator. We do this check for // performance reasons. If we did a QueryInterface on every tag it // would be inefficient. // nsGenericElement::SetDocument ought to keep a list like this one, // but it can't because scroll frames get around this. if (!aIsRoot && aTag != nsGkAtoms::input && aTag != nsGkAtoms::textarea && aTag != nsGkAtoms::combobox && aTag != nsGkAtoms::isindex && aTag != nsGkAtoms::scrollbar #ifdef MOZ_SVG && aTag != nsGkAtoms::use #endif ) return NS_OK; return CreateAnonymousFrames(aState, aParent, mDocument, aNewFrame, aAppendToExisting, aChildItems); } // after the node has been constructed and initialized create any // anonymous content a node needs. nsresult nsCSSFrameConstructor::CreateAnonymousFrames(nsFrameConstructorState& aState, nsIContent* aParent, nsIDocument* aDocument, nsIFrame* aParentFrame, PRBool aAppendToExisting, nsFrameItems& aChildItems) { nsIAnonymousContentCreator* creator = nsnull; CallQueryInterface(aParentFrame, &creator); if (!creator) return NS_OK; nsresult rv; nsAutoTArray newAnonymousItems; rv = creator->CreateAnonymousContent(newAnonymousItems); NS_ENSURE_SUCCESS(rv, rv); PRUint32 count = newAnonymousItems.Length(); if (count == 0) { return NS_OK; } // save the incoming pseudo frame state, so that we don't end up // with those pseudoframes in aChildItems nsPseudoFrames priorPseudoFrames; aState.mPseudoFrames.Reset(&priorPseudoFrames); for (PRUint32 i=0; i < count; i++) { // get our child's content and set its parent to our content nsIContent* content = newAnonymousItems[i]; NS_ASSERTION(content, "null anonymous content?"); content->SetNativeAnonymous(); nsIContent* bindingParent = content; #ifdef MOZ_SVG // least-surprise CSS binding until we do the SVG specified // cascading rules for - bug 265894 if (aParent && aParent->NodeInfo()->Equals(nsGkAtoms::use, kNameSpaceID_SVG)) bindingParent = aParent; #endif rv = content->BindToTree(aDocument, aParent, bindingParent, PR_TRUE); if (NS_FAILED(rv)) { content->UnbindFromTree(); return rv; } nsIFrame* newFrame = creator->CreateFrameFor(content); if (newFrame) { aChildItems.AddChild(newFrame); } else { // create the frame and attach it to our frame ConstructFrame(aState, content, aParentFrame, aChildItems); } } creator->PostCreateFrames(); // process the current pseudo frame state if (!aState.mPseudoFrames.IsEmpty()) { ProcessPseudoFrames(aState, aChildItems); } // restore the incoming pseudo frame state aState.mPseudoFrames = priorPseudoFrames; return NS_OK; } static PRBool IsXULDisplayType(const nsStyleDisplay* aDisplay) { return (aDisplay->mDisplay == NS_STYLE_DISPLAY_INLINE_BOX || aDisplay->mDisplay == NS_STYLE_DISPLAY_INLINE_GRID || aDisplay->mDisplay == NS_STYLE_DISPLAY_INLINE_STACK || aDisplay->mDisplay == NS_STYLE_DISPLAY_BOX || aDisplay->mDisplay == NS_STYLE_DISPLAY_GRID || aDisplay->mDisplay == NS_STYLE_DISPLAY_STACK || aDisplay->mDisplay == NS_STYLE_DISPLAY_GRID_GROUP || aDisplay->mDisplay == NS_STYLE_DISPLAY_GRID_LINE || aDisplay->mDisplay == NS_STYLE_DISPLAY_DECK || aDisplay->mDisplay == NS_STYLE_DISPLAY_POPUP || aDisplay->mDisplay == NS_STYLE_DISPLAY_GROUPBOX ); } nsresult nsCSSFrameConstructor::ConstructXULFrame(nsFrameConstructorState& aState, nsIContent* aContent, nsIFrame* aParentFrame, nsIAtom* aTag, PRInt32 aNameSpaceID, nsStyleContext* aStyleContext, nsFrameItems& aFrameItems, PRBool aXBLBaseTag, PRBool aHasPseudoParent, PRBool* aHaltProcessing) { *aHaltProcessing = PR_FALSE; PRBool primaryFrameSet = PR_FALSE; nsresult rv = NS_OK; PRBool isPopup = PR_FALSE; PRBool frameHasBeenInitialized = PR_FALSE; // XXXbz somewhere here we should process pseudo frames if !aHasPseudoParent // this is the new frame that will be created nsIFrame* newFrame = nsnull; // this is the also the new frame that is created. But if a scroll frame is needed // the content will be mapped to the scrollframe and topFrame will point to it. // newFrame will still point to the child that we created like a "div" for example. nsIFrame* topFrame = nsnull; // Store aParentFrame away, since we plan to stomp on it later nsIFrame* origParentFrame = aParentFrame; NS_ASSERTION(aTag != nsnull, "null XUL tag"); if (aTag == nsnull) return NS_OK; const nsStyleDisplay* display = aStyleContext->GetStyleDisplay(); PRBool isXULNS = (aNameSpaceID == kNameSpaceID_XUL); PRBool isXULDisplay = IsXULDisplayType(display); // don't apply xul display types to tag based frames if (isXULDisplay && !isXULNS) { isXULDisplay = !IsSpecialContent(aContent, aTag, aNameSpaceID, aStyleContext); } PRBool triedFrame = PR_FALSE; if (isXULNS || isXULDisplay) { PRBool mayBeScrollable = PR_FALSE; if (isXULNS) { triedFrame = PR_TRUE; // First try creating a frame based on the tag // Make sure to keep IsSpecialContent in synch with this code #ifdef MOZ_XUL // BUTTON CONSTRUCTION if (aTag == nsGkAtoms::button || aTag == nsGkAtoms::checkbox || aTag == nsGkAtoms::radio) { newFrame = NS_NewButtonBoxFrame(mPresShell, aStyleContext); // Boxes can scroll. mayBeScrollable = PR_TRUE; } // End of BUTTON CONSTRUCTION logic // AUTOREPEATBUTTON CONSTRUCTION else if (aTag == nsGkAtoms::autorepeatbutton) { newFrame = NS_NewAutoRepeatBoxFrame(mPresShell, aStyleContext); // Boxes can scroll. mayBeScrollable = PR_TRUE; } // End of AUTOREPEATBUTTON CONSTRUCTION logic // TITLEBAR CONSTRUCTION else if (aTag == nsGkAtoms::titlebar) { newFrame = NS_NewTitleBarFrame(mPresShell, aStyleContext); // Boxes can scroll. mayBeScrollable = PR_TRUE; } // End of TITLEBAR CONSTRUCTION logic // RESIZER CONSTRUCTION else if (aTag == nsGkAtoms::resizer) { newFrame = NS_NewResizerFrame(mPresShell, aStyleContext); // Boxes can scroll. mayBeScrollable = PR_TRUE; } // End of RESIZER CONSTRUCTION logic else if (aTag == nsGkAtoms::image) { newFrame = NS_NewImageBoxFrame(mPresShell, aStyleContext); } else if (aTag == nsGkAtoms::spring || aTag == nsGkAtoms::spacer) { newFrame = NS_NewLeafBoxFrame(mPresShell, aStyleContext); } else if (aTag == nsGkAtoms::treechildren) { newFrame = NS_NewTreeBodyFrame(mPresShell, aStyleContext); } else if (aTag == nsGkAtoms::treecol) { newFrame = NS_NewTreeColFrame(mPresShell, aStyleContext); } // TEXT CONSTRUCTION else if (aTag == nsGkAtoms::text || aTag == nsGkAtoms::label || aTag == nsGkAtoms::description) { if ((aTag == nsGkAtoms::label || aTag == nsGkAtoms::description) && (! aContent->HasAttr(kNameSpaceID_None, nsGkAtoms::value))) { // XXX we should probably be calling ConstructBlock here to handle // things like columns etc newFrame = NS_NewAreaFrame(mPresShell, aStyleContext, NS_BLOCK_SPACE_MGR | NS_BLOCK_MARGIN_ROOT); } else { newFrame = NS_NewTextBoxFrame(mPresShell, aStyleContext); } } // End of TEXT CONSTRUCTION logic // Menu Construction else if (aTag == nsGkAtoms::menu || aTag == nsGkAtoms::menuitem || aTag == nsGkAtoms::menubutton) { // A derived class box frame // that has custom reflow to prevent menu children // from becoming part of the flow. newFrame = NS_NewMenuFrame(mPresShell, aStyleContext, (aTag != nsGkAtoms::menuitem)); } else if (aTag == nsGkAtoms::menubar) { #ifdef XP_MACOSX // On Mac OS X, we use the system menubar for any root chrome shell // XUL menubars. PRBool isRootChromeShell = PR_FALSE; nsCOMPtr container = aState.mPresContext->GetContainer(); if (container) { nsCOMPtr treeItem(do_QueryInterface(container)); if (treeItem) { PRInt32 type; treeItem->GetItemType(&type); if (nsIDocShellTreeItem::typeChrome == type) { nsCOMPtr parent; treeItem->GetParent(getter_AddRefs(parent)); isRootChromeShell = !parent; } } } if (isRootChromeShell) { *aHaltProcessing = PR_TRUE; return NS_OK; } #endif newFrame = NS_NewMenuBarFrame(mPresShell, aStyleContext); } else if (aTag == nsGkAtoms::popupgroup && aContent->IsNativeAnonymous()) { // This frame contains child popups newFrame = NS_NewPopupSetFrame(mPresShell, aStyleContext); } else if (aTag == nsGkAtoms::iframe || aTag == nsGkAtoms::editor || aTag == nsGkAtoms::browser) { newFrame = NS_NewSubDocumentFrame(mPresShell, aStyleContext); } // PROGRESS METER CONSTRUCTION else if (aTag == nsGkAtoms::progressmeter) { newFrame = NS_NewProgressMeterFrame(mPresShell, aStyleContext); } // End of PROGRESS METER CONSTRUCTION logic else #endif // SLIDER CONSTRUCTION if (aTag == nsGkAtoms::slider) { newFrame = NS_NewSliderFrame(mPresShell, aStyleContext); } // End of SLIDER CONSTRUCTION logic // SCROLLBAR CONSTRUCTION else if (aTag == nsGkAtoms::scrollbar) { newFrame = NS_NewScrollbarFrame(mPresShell, aStyleContext); } // End of SCROLLBAR CONSTRUCTION logic // SCROLLBUTTON CONSTRUCTION else if (aTag == nsGkAtoms::scrollbarbutton) { newFrame = NS_NewScrollbarButtonFrame(mPresShell, aStyleContext); } // End of SCROLLBUTTON CONSTRUCTION logic #ifdef MOZ_XUL // SPLITTER CONSTRUCTION else if (aTag == nsGkAtoms::splitter) { newFrame = NS_NewSplitterFrame(mPresShell, aStyleContext); } // End of SPLITTER CONSTRUCTION logic else { triedFrame = PR_FALSE; } #endif } // Display types for XUL start here // Make sure this is kept in sync with nsCSSProps::kDisplayKTable // First is BOX if (!newFrame && isXULDisplay) { triedFrame = PR_TRUE; if (display->mDisplay == NS_STYLE_DISPLAY_INLINE_BOX || display->mDisplay == NS_STYLE_DISPLAY_BOX) { newFrame = NS_NewBoxFrame(mPresShell, aStyleContext, PR_FALSE, nsnull); // Boxes can scroll. mayBeScrollable = PR_TRUE; } // End of BOX CONSTRUCTION logic #ifdef MOZ_XUL // ------- Begin Grid --------- else if (display->mDisplay == NS_STYLE_DISPLAY_INLINE_GRID || display->mDisplay == NS_STYLE_DISPLAY_GRID) { nsCOMPtr layout; NS_NewGridLayout2(mPresShell, getter_AddRefs(layout)); newFrame = NS_NewBoxFrame(mPresShell, aStyleContext, PR_FALSE, layout); // Boxes can scroll. mayBeScrollable = PR_TRUE; } //------- End Grid ------ // ------- Begin Rows/Columns --------- else if (display->mDisplay == NS_STYLE_DISPLAY_GRID_GROUP) { nsCOMPtr layout; if (aTag == nsGkAtoms::listboxbody) { NS_NewListBoxLayout(mPresShell, layout); newFrame = NS_NewListBoxBodyFrame(mPresShell, aStyleContext, PR_FALSE, layout); } else { NS_NewGridRowGroupLayout(mPresShell, getter_AddRefs(layout)); newFrame = NS_NewGridRowGroupFrame(mPresShell, aStyleContext, PR_FALSE, layout); } // Boxes can scroll. if (display->IsScrollableOverflow()) { // set the top to be the newly created scrollframe BuildScrollFrame(aState, aContent, aStyleContext, newFrame, aParentFrame, nsnull, topFrame, aStyleContext); // we have a scrollframe so the parent becomes the scroll frame. aParentFrame = newFrame->GetParent(); primaryFrameSet = PR_TRUE; frameHasBeenInitialized = PR_TRUE; } } //------- End Grid ------ // ------- Begin Row/Column --------- else if (display->mDisplay == NS_STYLE_DISPLAY_GRID_LINE) { nsCOMPtr layout; NS_NewGridRowLeafLayout(mPresShell, getter_AddRefs(layout)); if (aTag == nsGkAtoms::listitem) newFrame = NS_NewListItemFrame(mPresShell, aStyleContext, PR_FALSE, layout); else newFrame = NS_NewGridRowLeafFrame(mPresShell, aStyleContext, PR_FALSE, layout); // Boxes can scroll. mayBeScrollable = PR_TRUE; } //------- End Grid ------ // End of STACK CONSTRUCTION logic // DECK CONSTRUCTION else if (display->mDisplay == NS_STYLE_DISPLAY_DECK) { newFrame = NS_NewDeckFrame(mPresShell, aStyleContext); } // End of DECK CONSTRUCTION logic else if (display->mDisplay == NS_STYLE_DISPLAY_GROUPBOX) { newFrame = NS_NewGroupBoxFrame(mPresShell, aStyleContext); // Boxes can scroll. mayBeScrollable = PR_TRUE; } // STACK CONSTRUCTION else if (display->mDisplay == NS_STYLE_DISPLAY_STACK || display->mDisplay == NS_STYLE_DISPLAY_INLINE_STACK) { newFrame = NS_NewStackFrame(mPresShell, aStyleContext); mayBeScrollable = PR_TRUE; } else if (display->mDisplay == NS_STYLE_DISPLAY_POPUP) { // If a popup is inside a menu, then the menu understands the complex // rules/behavior governing the cascade of multiple menu popups and can handle // having the real popup frame placed under it as a child. // If, however, the parent is *not* a menu frame, then we need to create // a placeholder frame for the popup, and then we add the popup frame to the // root popup set (that manages all such "detached" popups). if (aParentFrame->GetType() != nsGkAtoms::menuFrame) { if (!aState.mPopupItems.containingBlock) { // Just don't create a frame for this popup; we can't do // anything with it, since there is no root popup set. *aHaltProcessing = PR_TRUE; NS_ASSERTION(!aState.mRootBox, "Popup containing block is missing"); return NS_OK; } #ifdef NS_DEBUG NS_ASSERTION(aState.mPopupItems.containingBlock->GetType() == nsGkAtoms::popupSetFrame, "Popup containing block isn't a nsIPopupSetFrame"); #endif isPopup = PR_TRUE; } // This is its own frame that derives from box. newFrame = NS_NewMenuPopupFrame(mPresShell, aStyleContext); if (aTag == nsGkAtoms::tooltip) { if (aContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::_default, nsGkAtoms::_true, eIgnoreCase)) { // Tell the root box about the tooltip. if (aState.mRootBox) aState.mRootBox->SetDefaultTooltip(aContent); } } } else { triedFrame = PR_FALSE; } #endif // MOZ_XUL } if (mayBeScrollable && display->IsScrollableOverflow()) { // set the top to be the newly created scrollframe BuildScrollFrame(aState, aContent, aStyleContext, newFrame, aParentFrame, nsnull, topFrame, aStyleContext); // we have a scrollframe so the parent becomes the scroll frame. // XXXldb Do we really want to do this? The one case where it // matters when |frameHasBeenInitialized| is true is one where // I think we'd be better off the other way around. aParentFrame = newFrame->GetParent(); primaryFrameSet = PR_TRUE; frameHasBeenInitialized = PR_TRUE; } } if (NS_UNLIKELY(triedFrame && !newFrame)) { rv = NS_ERROR_OUT_OF_MEMORY; } // If we succeeded in creating a frame then initialize it, process its // children (if requested), and set the initial child list if (NS_SUCCEEDED(rv) && newFrame != nsnull) { // if no top frame was created then the top is the new frame if (topFrame == nsnull) topFrame = newFrame; // xul does not support absolute positioning nsIFrame* geometricParent; #ifdef MOZ_XUL if (isPopup) { NS_ASSERTION(aState.mPopupItems.containingBlock, "How did we get here?"); geometricParent = aState.mPopupItems.containingBlock; } else #endif { geometricParent = aParentFrame; } /* nsIFrame* geometricParent = aState.GetGeometricParent(display, aParentFrame); */ // if the new frame was already initialized to initialize it again. if (!frameHasBeenInitialized) { rv = InitAndRestoreFrame(aState, aContent, geometricParent, nsnull, newFrame); if (NS_FAILED(rv)) { newFrame->Destroy(); return rv; } /* // if our parent is a block frame then do things the way html likes it // if not then we are in a box so do what boxes like. On example is boxes // do not support the absolute positioning of their children. While html blocks // that's why we call different things here. nsIAtom* frameType = geometricParent->GetType(); if ((frameType == nsGkAtoms::blockFrame) || (frameType == nsGkAtoms::areaFrame)) { */ // See if we need to create a view, e.g. the frame is absolutely positioned nsHTMLContainerFrame::CreateViewForFrame(newFrame, aParentFrame, PR_FALSE); /* } else { // we are in a box so do the box thing. nsBoxFrame::CreateViewForFrame(aState.mPresContext, newFrame, aStyleContext, PR_FALSE); } */ } // Add the new frame to our list of frame items. Note that we // don't support floating or positioning of XUL frames. rv = aState.AddChild(topFrame, aFrameItems, aContent, aStyleContext, origParentFrame, PR_FALSE, PR_FALSE, isPopup); if (NS_FAILED(rv)) { return rv; } #ifdef MOZ_XUL if (aTag == nsGkAtoms::popupgroup && aContent->IsNativeAnonymous()) { nsIRootBox* rootBox = nsIRootBox::GetRootBox(mPresShell); if (rootBox) { NS_ASSERTION(rootBox->GetPopupSetFrame() == newFrame, "Unexpected PopupSetFrame"); aState.mPopupItems.containingBlock = rootBox->GetPopupSetFrame(); } } #endif // If the new frame isn't a float containing block, then push a null // float containing block to disable floats. This is needed to disable // floats within XUL frames. nsFrameConstructorSaveState floatSaveState; PRBool isFloatContainingBlock = newFrame->GetContentInsertionFrame()->IsFloatContainingBlock(); aState.PushFloatContainingBlock(isFloatContainingBlock ? newFrame : nsnull, floatSaveState, PR_FALSE, PR_FALSE); // Process the child content if requested nsFrameItems childItems; if (!newFrame->IsLeaf()) { // XXXbz don't we need calls to ShouldBuildChildFrames // elsewhere too? Why only for XUL? if (mDocument->BindingManager()->ShouldBuildChildFrames(aContent)) { rv = ProcessChildren(aState, aContent, newFrame, PR_FALSE, childItems, PR_FALSE); nsIContent *badKid; if (newFrame->IsBoxFrame() && (badKid = AnyKidsNeedBlockParent(childItems.childList))) { nsAutoString parentTag, kidTag; aContent->Tag()->ToString(parentTag); badKid->Tag()->ToString(kidTag); const PRUnichar* params[] = { parentTag.get(), kidTag.get() }; nsContentUtils::ReportToConsole(nsContentUtils::eXUL_PROPERTIES, "NeededToWrapXUL", params, NS_ARRAY_LENGTH(params), mDocument->GetDocumentURI(), EmptyString(), 0, 0, // not useful nsIScriptError::warningFlag, "FrameConstructor"); nsRefPtr blockSC = mPresShell->StyleSet()-> ResolvePseudoStyleFor(aContent, nsCSSAnonBoxes::mozXULAnonymousBlock, aStyleContext); nsIFrame *blockFrame = NS_NewBlockFrame(mPresShell, blockSC); // We might, in theory, want to set NS_BLOCK_SPACE_MGR and // NS_BLOCK_MARGIN_ROOT, but I think it's a bad idea given that // a real block placed here wouldn't get those set on it. InitAndRestoreFrame(aState, aContent, newFrame, nsnull, blockFrame, PR_FALSE); NS_ASSERTION(!blockFrame->HasView(), "need to do view reparenting"); for (nsIFrame *f = childItems.childList; f; f = f->GetNextSibling()) { ReparentFrame(aState.mFrameManager, blockFrame, f); } blockFrame->AppendFrames(nsnull, childItems.childList); childItems = nsFrameItems(); childItems.AddChild(blockFrame); newFrame->AddStateBits(NS_STATE_BOX_WRAPS_KIDS_IN_BLOCK); } } } // XXX These should go after the wrapper! CreateAnonymousFrames(aTag, aState, aContent, newFrame, PR_FALSE, childItems); // Set the frame's initial child list newFrame->SetInitialChildList(nsnull, childItems.childList); } #ifdef MOZ_XUL // register tooltip support if needed if (aTag == nsGkAtoms::treechildren || // trees always need titletips aContent->HasAttr(kNameSpaceID_None, nsGkAtoms::tooltiptext) || aContent->HasAttr(kNameSpaceID_None, nsGkAtoms::tooltip)) { nsIRootBox* rootBox = nsIRootBox::GetRootBox(mPresShell); if (rootBox) rootBox->AddTooltipSupport(aContent); } #endif // addToHashTable: if (topFrame) { // the top frame is always what we map the content to. This is the frame that contains a pointer // to the content node. // Add a mapping from content object to primary frame. Note that for // floated and positioned frames this is the out-of-flow frame and not // the placeholder frame if (!primaryFrameSet) aState.mFrameManager->SetPrimaryFrameFor(aContent, topFrame); } return rv; } nsresult nsCSSFrameConstructor::AddLazyChildren(nsIContent* aContent, nsLazyFrameConstructionCallback* aCallback, void* aArg, PRBool aIsSynch) { nsCOMPtr event = new LazyGenerateChildrenEvent(aContent, mPresShell, aCallback, aArg); return aIsSynch ? event->Run() : NS_DispatchToCurrentThread(event); } already_AddRefed nsCSSFrameConstructor::BeginBuildingScrollFrame(nsFrameConstructorState& aState, nsIContent* aContent, nsStyleContext* aContentStyle, nsIFrame* aParentFrame, nsIFrame* aContentParentFrame, nsIAtom* aScrolledPseudo, PRBool aIsRoot, nsIFrame*& aNewFrame) { nsIFrame* parentFrame = nsnull; nsIFrame* gfxScrollFrame = aNewFrame; nsFrameItems anonymousItems; nsRefPtr contentStyle = aContentStyle; if (!gfxScrollFrame) { // Build a XULScrollFrame when the child is a box, otherwise an // HTMLScrollFrame if (IsXULDisplayType(aContentStyle->GetStyleDisplay())) { gfxScrollFrame = NS_NewXULScrollFrame(mPresShell, contentStyle, aIsRoot); } else { gfxScrollFrame = NS_NewHTMLScrollFrame(mPresShell, contentStyle, aIsRoot); } InitAndRestoreFrame(aState, aContent, aParentFrame, nsnull, gfxScrollFrame); // Create a view nsHTMLContainerFrame::CreateViewForFrame(gfxScrollFrame, aContentParentFrame, PR_FALSE); } // if there are any anonymous children for the scroll frame, create // frames for them. CreateAnonymousFrames(aState, aContent, mDocument, gfxScrollFrame, PR_FALSE, anonymousItems); parentFrame = gfxScrollFrame; aNewFrame = gfxScrollFrame; // we used the style that was passed in. So resolve another one. nsStyleSet *styleSet = mPresShell->StyleSet(); nsStyleContext* aScrolledChildStyle = styleSet->ResolvePseudoStyleFor(aContent, aScrolledPseudo, contentStyle).get(); if (gfxScrollFrame) { gfxScrollFrame->SetInitialChildList(nsnull, anonymousItems.childList); } return aScrolledChildStyle; } void nsCSSFrameConstructor::FinishBuildingScrollFrame(nsIFrame* aScrollFrame, nsIFrame* aScrolledFrame) { aScrollFrame->AppendFrames(nsnull, aScrolledFrame); // force the scrolled frame to have a view. The view will be parented to // the correct anonymous inner view because the scrollframes override // nsIFrame::GetParentViewForChildFrame. nsHTMLContainerFrame::CreateViewForFrame(aScrolledFrame, nsnull, PR_TRUE); nsIView* view = aScrolledFrame->GetView(); if (!view) return; } /** * Called to wrap a gfx scrollframe around a frame. The hierarchy will look like this * * ------- for gfx scrollbars ------ * * * ScrollFrame * ^ * | * Frame (scrolled frame you passed in) * * *----------------------------------- * LEGEND: * * ScrollFrame: This is a frame that manages gfx cross platform frame based scrollbars. * * @param aContent the content node of the child to wrap. * @param aScrolledFrame The frame of the content to wrap. This should not be * Initialized. This method will initialize it with a scrolled pseudo * and no nsIContent. The content will be attached to the scrollframe * returned. * @param aContentStyle the style context that has already been resolved for the content being passed in. * * @param aParentFrame The parent to attach the scroll frame to * * @param aNewFrame The new scrollframe or gfx scrollframe that we create. It will contain the * scrolled frame you passed in. (returned) * If this is not null, we'll just use it * @param aScrolledContentStyle the style that was resolved for the scrolled frame. (returned) */ nsresult nsCSSFrameConstructor::BuildScrollFrame(nsFrameConstructorState& aState, nsIContent* aContent, nsStyleContext* aContentStyle, nsIFrame* aScrolledFrame, nsIFrame* aParentFrame, nsIFrame* aContentParentFrame, nsIFrame*& aNewFrame, nsStyleContext*& aScrolledContentStyle) { nsRefPtr scrolledContentStyle = BeginBuildingScrollFrame(aState, aContent, aContentStyle, aParentFrame, aContentParentFrame, nsCSSAnonBoxes::scrolledContent, PR_FALSE, aNewFrame); aScrolledFrame->SetStyleContextWithoutNotification(scrolledContentStyle); InitAndRestoreFrame(aState, aContent, aNewFrame, nsnull, aScrolledFrame); FinishBuildingScrollFrame(aNewFrame, aScrolledFrame); aScrolledContentStyle = scrolledContentStyle; // now set the primary frame to the ScrollFrame aState.mFrameManager->SetPrimaryFrameFor( aContent, aNewFrame ); return NS_OK; } nsresult nsCSSFrameConstructor::ConstructFrameByDisplayType(nsFrameConstructorState& aState, const nsStyleDisplay* aDisplay, nsIContent* aContent, PRInt32 aNameSpaceID, nsIAtom* aTag, nsIFrame* aParentFrame, nsStyleContext* aStyleContext, nsFrameItems& aFrameItems, PRBool aHasPseudoParent) { PRBool primaryFrameSet = PR_FALSE; nsIFrame* newFrame = nsnull; // the frame we construct PRBool addToHashTable = PR_TRUE; PRBool addedToFrameList = PR_FALSE; nsresult rv = NS_OK; // The style system ensures that floated and positioned frames are // block-level. NS_ASSERTION(!(aDisplay->IsFloating() || aDisplay->IsAbsolutelyPositioned()) || aDisplay->IsBlockOutside(), "Style system did not apply CSS2.1 section 9.7 fixups"); // If this is "body", try propagating its scroll style to the viewport // Note that we need to do this even if the body is NOT scrollable; // it might have dynamically changed from scrollable to not scrollable, // and that might need to be propagated. PRBool propagatedScrollToViewport = PR_FALSE; if (aContent->NodeInfo()->Equals(nsGkAtoms::body) && aContent->IsNodeOfType(nsINode::eHTML)) { propagatedScrollToViewport = PropagateScrollToViewport() == aContent; } // If the frame is a block-level frame and is scrollable, then wrap it // in a scroll frame. // XXX Ignore tables for the time being if (aDisplay->IsBlockInside() && aDisplay->IsScrollableOverflow() && !propagatedScrollToViewport) { if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) { ProcessPseudoFrames(aState, aFrameItems); } nsRefPtr scrolledContentStyle = BeginBuildingScrollFrame(aState, aContent, aStyleContext, aState.GetGeometricParent(aDisplay, aParentFrame), aParentFrame, nsCSSAnonBoxes::scrolledContent, PR_FALSE, newFrame); // Initialize it // pass a temporary stylecontext, the correct one will be set later nsIFrame* scrolledFrame = NS_NewAreaFrame(mPresShell, aStyleContext, NS_BLOCK_SPACE_MGR | NS_BLOCK_MARGIN_ROOT); nsFrameItems blockItem; rv = ConstructBlock(aState, scrolledContentStyle->GetStyleDisplay(), aContent, newFrame, newFrame, scrolledContentStyle, &scrolledFrame, blockItem, aDisplay->IsPositioned()); NS_ASSERTION(blockItem.childList == scrolledFrame, "Scrollframe's frameItems should be exactly the scrolled frame"); FinishBuildingScrollFrame(newFrame, scrolledFrame); rv = aState.AddChild(newFrame, aFrameItems, aContent, aStyleContext, aParentFrame); if (NS_FAILED(rv)) { return rv; } addedToFrameList = PR_TRUE; } // See if the frame is absolute or fixed positioned else if (aDisplay->IsAbsolutelyPositioned() && (NS_STYLE_DISPLAY_BLOCK == aDisplay->mDisplay || NS_STYLE_DISPLAY_LIST_ITEM == aDisplay->mDisplay)) { if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) { ProcessPseudoFrames(aState, aFrameItems); } // Create a frame to wrap up the absolute positioned item // pass a temporary stylecontext, the correct one will be set later newFrame = NS_NewAbsoluteItemWrapperFrame(mPresShell, aStyleContext); rv = ConstructBlock(aState, aDisplay, aContent, aState.GetGeometricParent(aDisplay, aParentFrame), aParentFrame, aStyleContext, &newFrame, aFrameItems, PR_TRUE); if (NS_FAILED(rv)) { return rv; } addedToFrameList = PR_TRUE; } // See if the frame is floated and it's a block frame else if (aDisplay->IsFloating() && (NS_STYLE_DISPLAY_BLOCK == aDisplay->mDisplay || NS_STYLE_DISPLAY_LIST_ITEM == aDisplay->mDisplay)) { if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) { ProcessPseudoFrames(aState, aFrameItems); } // Create an area frame // pass a temporary stylecontext, the correct one will be set later newFrame = NS_NewFloatingItemWrapperFrame(mPresShell, aStyleContext); rv = ConstructBlock(aState, aDisplay, aContent, aState.GetGeometricParent(aDisplay, aParentFrame), aParentFrame, aStyleContext, &newFrame, aFrameItems, aDisplay->mPosition == NS_STYLE_POSITION_RELATIVE); if (NS_FAILED(rv)) { return rv; } addedToFrameList = PR_TRUE; } // See if it's relatively positioned else if ((NS_STYLE_POSITION_RELATIVE == aDisplay->mPosition) && (aDisplay->IsBlockInside() || (NS_STYLE_DISPLAY_INLINE == aDisplay->mDisplay))) { if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) { ProcessPseudoFrames(aState, aFrameItems); } // Is it block-level or inline-level? if (aDisplay->IsBlockInside()) { // Create a wrapper frame. Only need space manager if it's inline-block PRUint32 flags = (aDisplay->mDisplay == NS_STYLE_DISPLAY_INLINE_BLOCK ? NS_BLOCK_SPACE_MGR | NS_BLOCK_MARGIN_ROOT : 0); newFrame = NS_NewRelativeItemWrapperFrame(mPresShell, aStyleContext, flags); // XXXbz should we be passing in a non-null aContentParentFrame? ConstructBlock(aState, aDisplay, aContent, aParentFrame, nsnull, aStyleContext, &newFrame, aFrameItems, PR_TRUE); addedToFrameList = PR_TRUE; } else { // Create a positioned inline frame newFrame = NS_NewPositionedInlineFrame(mPresShell, aStyleContext); // Note that we want to insert the inline after processing kids, since // processing of kids may split the inline. ConstructInline(aState, aDisplay, aContent, aParentFrame, aStyleContext, PR_TRUE, newFrame); } } // See if it's a block frame of some sort else if ((NS_STYLE_DISPLAY_BLOCK == aDisplay->mDisplay) || (NS_STYLE_DISPLAY_LIST_ITEM == aDisplay->mDisplay) || (NS_STYLE_DISPLAY_RUN_IN == aDisplay->mDisplay) || (NS_STYLE_DISPLAY_COMPACT == aDisplay->mDisplay) || (NS_STYLE_DISPLAY_INLINE_BLOCK == aDisplay->mDisplay)) { if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) { ProcessPseudoFrames(aState, aFrameItems); } PRUint32 flags = 0; if (NS_STYLE_DISPLAY_INLINE_BLOCK == aDisplay->mDisplay) { flags = NS_BLOCK_SPACE_MGR | NS_BLOCK_MARGIN_ROOT; } // Create the block frame newFrame = NS_NewBlockFrame(mPresShell, aStyleContext, flags); if (newFrame) { // That worked so construct the block and its children // XXXbz should we be passing in a non-null aContentParentFrame? rv = ConstructBlock(aState, aDisplay, aContent, aParentFrame, nsnull, aStyleContext, &newFrame, aFrameItems, PR_FALSE); addedToFrameList = PR_TRUE; } else { rv = NS_ERROR_OUT_OF_MEMORY; } } // See if it's an inline frame of some sort else if ((NS_STYLE_DISPLAY_INLINE == aDisplay->mDisplay) || (NS_STYLE_DISPLAY_MARKER == aDisplay->mDisplay)) { if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) { ProcessPseudoFrames(aState, aFrameItems); } // Create the inline frame newFrame = NS_NewInlineFrame(mPresShell, aStyleContext); if (newFrame) { // That worked so construct the inline and its children // Note that we want to insert the inline after processing kids, since // processing of kids may split the inline. rv = ConstructInline(aState, aDisplay, aContent, aParentFrame, aStyleContext, PR_FALSE, newFrame); } else { rv = NS_ERROR_OUT_OF_MEMORY; } // To keep the hash table small don't add inline frames (they're // typically things like FONT and B), because we can quickly // find them if we need to addToHashTable = PR_FALSE; } // otherwise let the display property influence the frame type to create else { // XXX This section now only handles table frames; should be // factored out probably // Use the 'display' property to choose a frame type switch (aDisplay->mDisplay) { case NS_STYLE_DISPLAY_TABLE: case NS_STYLE_DISPLAY_INLINE_TABLE: { nsIFrame* innerTable; rv = ConstructTableFrame(aState, aContent, aParentFrame, aStyleContext, aNameSpaceID, PR_FALSE, aFrameItems, PR_TRUE, newFrame, innerTable); addedToFrameList = PR_TRUE; // Note: table construction function takes care of initializing // the frame, processing children, and setting the initial child // list break; } // the next 5 cases are only relevant if the parent is not a table, ConstructTableFrame handles children case NS_STYLE_DISPLAY_TABLE_CAPTION: { // aParentFrame may be an inner table frame rather than an outer frame // In this case we need to get the outer frame. nsIFrame* parentFrame = AdjustCaptionParentFrame(aParentFrame); rv = ConstructTableCaptionFrame(aState, aContent, parentFrame, aStyleContext, aNameSpaceID, aFrameItems, newFrame, aHasPseudoParent); if (NS_SUCCEEDED(rv) && !aHasPseudoParent) { aFrameItems.AddChild(newFrame); } return rv; } case NS_STYLE_DISPLAY_TABLE_ROW_GROUP: case NS_STYLE_DISPLAY_TABLE_HEADER_GROUP: case NS_STYLE_DISPLAY_TABLE_FOOTER_GROUP: rv = ConstructTableRowGroupFrame(aState, aContent, aParentFrame, aStyleContext, aNameSpaceID, PR_FALSE, aFrameItems, newFrame, aHasPseudoParent); if (NS_SUCCEEDED(rv) && !aHasPseudoParent) { aFrameItems.AddChild(newFrame); } return rv; case NS_STYLE_DISPLAY_TABLE_COLUMN_GROUP: rv = ConstructTableColGroupFrame(aState, aContent, aParentFrame, aStyleContext, aNameSpaceID, PR_FALSE, aFrameItems, newFrame, aHasPseudoParent); if (NS_SUCCEEDED(rv) && !aHasPseudoParent) { aFrameItems.AddChild(newFrame); } return rv; case NS_STYLE_DISPLAY_TABLE_COLUMN: rv = ConstructTableColFrame(aState, aContent, aParentFrame, aStyleContext, aNameSpaceID, PR_FALSE, aFrameItems, newFrame, aHasPseudoParent); if (NS_SUCCEEDED(rv) && !aHasPseudoParent) { aFrameItems.AddChild(newFrame); } return rv; case NS_STYLE_DISPLAY_TABLE_ROW: rv = ConstructTableRowFrame(aState, aContent, aParentFrame, aStyleContext, aNameSpaceID, PR_FALSE, aFrameItems, newFrame, aHasPseudoParent); if (NS_SUCCEEDED(rv) && !aHasPseudoParent) { aFrameItems.AddChild(newFrame); } return rv; case NS_STYLE_DISPLAY_TABLE_CELL: { nsIFrame* innerTable; rv = ConstructTableCellFrame(aState, aContent, aParentFrame, aStyleContext, aNameSpaceID, PR_FALSE, aFrameItems, newFrame, innerTable, aHasPseudoParent); if (NS_SUCCEEDED(rv) && !aHasPseudoParent) { aFrameItems.AddChild(newFrame); } return rv; } default: NS_NOTREACHED("How did we get here?"); break; } } if (!addedToFrameList) { // Gotta do it here NS_ASSERTION(!aDisplay->IsAbsolutelyPositioned() && !aDisplay->IsFloating(), "Things that could be out-of-flow need to handle adding " "to the frame list themselves"); rv = aState.AddChild(newFrame, aFrameItems, aContent, aStyleContext, aParentFrame); NS_ASSERTION(NS_SUCCEEDED(rv), "Cases where AddChild() can fail must handle it themselves"); } if (newFrame && addToHashTable) { // Add a mapping from content object to primary frame. Note that for // floated and positioned frames this is the out-of-flow frame and not // the placeholder frame if (!primaryFrameSet) { aState.mFrameManager->SetPrimaryFrameFor(aContent, newFrame); } } return rv; } nsresult nsCSSFrameConstructor::InitAndRestoreFrame(const nsFrameConstructorState& aState, nsIContent* aContent, nsIFrame* aParentFrame, nsIFrame* aPrevInFlow, nsIFrame* aNewFrame, PRBool aAllowCounters) { NS_PRECONDITION(mUpdateCount != 0, "Should be in an update while creating frames"); nsresult rv = NS_OK; NS_ASSERTION(aNewFrame, "Null frame cannot be initialized"); if (!aNewFrame) return NS_ERROR_NULL_POINTER; // Initialize the frame rv = aNewFrame->Init(aContent, aParentFrame, aPrevInFlow); if (aState.mFrameState && aState.mFrameManager) { // Restore frame state for just the newly created frame. aState.mFrameManager->RestoreFrameStateFor(aNewFrame, aState.mFrameState); } if (aAllowCounters && !aPrevInFlow && mCounterManager.AddCounterResetsAndIncrements(aNewFrame)) { CountersDirty(); } return rv; } already_AddRefed nsCSSFrameConstructor::ResolveStyleContext(nsIFrame* aParentFrame, nsIContent* aContent) { nsStyleContext* parentStyleContext; if (aContent->GetParent()) { aParentFrame = nsFrame::CorrectStyleParentFrame(aParentFrame, nsnull); // Resolve the style context based on the content object and the parent // style context parentStyleContext = aParentFrame->GetStyleContext(); } else { // This has got to be a call from ConstructDocElementTableFrame. // Not sure how best to asserrt that here. parentStyleContext = nsnull; } nsStyleSet *styleSet = mPresShell->StyleSet(); if (aContent->IsNodeOfType(nsINode::eELEMENT)) { return styleSet->ResolveStyleFor(aContent, parentStyleContext); } else { NS_ASSERTION(aContent->IsNodeOfType(nsINode::eTEXT), "shouldn't waste time creating style contexts for " "comments and processing instructions"); return styleSet->ResolveStyleForNonElement(parentStyleContext); } } // MathML Mod - RBS #ifdef MOZ_MATHML nsresult nsCSSFrameConstructor::FlushAccumulatedBlock(nsFrameConstructorState& aState, nsIContent* aContent, nsIFrame* aParentFrame, nsFrameItems* aBlockItems, nsFrameItems* aNewItems) { if (!aBlockItems->childList) { // Nothing to do return NS_OK; } nsStyleContext* parentContext = nsFrame::CorrectStyleParentFrame(aParentFrame, nsCSSAnonBoxes::mozMathMLAnonymousBlock)->GetStyleContext(); nsStyleSet *styleSet = mPresShell->StyleSet(); nsRefPtr blockContext; blockContext = styleSet->ResolvePseudoStyleFor(aContent, nsCSSAnonBoxes::mozMathMLAnonymousBlock, parentContext); // then, create a block frame that will wrap the child frames. Make it a // MathML frame so that Get(Absolute/Float)ContainingBlockFor know that this // is not a suitable block. nsIFrame* blockFrame = NS_NewMathMLmathBlockFrame(mPresShell, blockContext, NS_BLOCK_SPACE_MGR | NS_BLOCK_MARGIN_ROOT); if (NS_UNLIKELY(!blockFrame)) return NS_ERROR_OUT_OF_MEMORY; InitAndRestoreFrame(aState, aContent, aParentFrame, nsnull, blockFrame); for (nsIFrame* f = aBlockItems->childList; f; f = f->GetNextSibling()) { ReparentFrame(aState.mFrameManager, blockFrame, f); } // abs-pos and floats are disabled in MathML children so we don't have to // worry about messing up those. blockFrame->SetInitialChildList(nsnull, aBlockItems->childList); *aBlockItems = nsFrameItems(); aNewItems->AddChild(blockFrame); return NS_OK; } nsresult nsCSSFrameConstructor::ConstructMathMLFrame(nsFrameConstructorState& aState, nsIContent* aContent, nsIFrame* aParentFrame, nsIAtom* aTag, PRInt32 aNameSpaceID, nsStyleContext* aStyleContext, nsFrameItems& aFrameItems, PRBool aHasPseudoParent) { // Make sure that we remain confined in the MathML world if (aNameSpaceID != kNameSpaceID_MathML) return NS_OK; nsresult rv = NS_OK; PRBool ignoreInterTagWhitespace = PR_TRUE; NS_ASSERTION(aTag != nsnull, "null MathML tag"); if (aTag == nsnull) return NS_OK; // Initialize the new frame nsIFrame* newFrame = nsnull; // Make sure to keep IsSpecialContent in synch with this code const nsStyleDisplay* disp = aStyleContext->GetStyleDisplay(); // Leverage IsSpecialContent to check if one of the |if aTag| below will // surely match (knowing that aNameSpaceID == kNameSpaceID_MathML here) if (IsSpecialContent(aContent, aTag, aNameSpaceID, aStyleContext)) { // process pending pseudo frames if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) { ProcessPseudoFrames(aState, aFrameItems); } } if (aTag == nsGkAtoms::mi_ || aTag == nsGkAtoms::mn_ || aTag == nsGkAtoms::ms_ || aTag == nsGkAtoms::mtext_) newFrame = NS_NewMathMLTokenFrame(mPresShell, aStyleContext); else if (aTag == nsGkAtoms::mo_) newFrame = NS_NewMathMLmoFrame(mPresShell, aStyleContext); else if (aTag == nsGkAtoms::mfrac_) newFrame = NS_NewMathMLmfracFrame(mPresShell, aStyleContext); else if (aTag == nsGkAtoms::msup_) newFrame = NS_NewMathMLmsupFrame(mPresShell, aStyleContext); else if (aTag == nsGkAtoms::msub_) newFrame = NS_NewMathMLmsubFrame(mPresShell, aStyleContext); else if (aTag == nsGkAtoms::msubsup_) newFrame = NS_NewMathMLmsubsupFrame(mPresShell, aStyleContext); else if (aTag == nsGkAtoms::munder_) newFrame = NS_NewMathMLmunderFrame(mPresShell, aStyleContext); else if (aTag == nsGkAtoms::mover_) newFrame = NS_NewMathMLmoverFrame(mPresShell, aStyleContext); else if (aTag == nsGkAtoms::munderover_) newFrame = NS_NewMathMLmunderoverFrame(mPresShell, aStyleContext); else if (aTag == nsGkAtoms::mphantom_) newFrame = NS_NewMathMLmphantomFrame(mPresShell, aStyleContext); else if (aTag == nsGkAtoms::mpadded_) newFrame = NS_NewMathMLmpaddedFrame(mPresShell, aStyleContext); else if (aTag == nsGkAtoms::mspace_ || aTag == nsGkAtoms::none || aTag == nsGkAtoms::mprescripts_) newFrame = NS_NewMathMLmspaceFrame(mPresShell, aStyleContext); else if (aTag == nsGkAtoms::mfenced_) newFrame = NS_NewMathMLmfencedFrame(mPresShell, aStyleContext); else if (aTag == nsGkAtoms::mmultiscripts_) newFrame = NS_NewMathMLmmultiscriptsFrame(mPresShell, aStyleContext); else if (aTag == nsGkAtoms::mstyle_) newFrame = NS_NewMathMLmstyleFrame(mPresShell, aStyleContext); else if (aTag == nsGkAtoms::msqrt_) newFrame = NS_NewMathMLmsqrtFrame(mPresShell, aStyleContext); else if (aTag == nsGkAtoms::mroot_) newFrame = NS_NewMathMLmrootFrame(mPresShell, aStyleContext); else if (aTag == nsGkAtoms::maction_) newFrame = NS_NewMathMLmactionFrame(mPresShell, aStyleContext); else if (aTag == nsGkAtoms::mrow_ || aTag == nsGkAtoms::merror_) newFrame = NS_NewMathMLmrowFrame(mPresShell, aStyleContext); // CONSTRUCTION of MTABLE elements else if (aTag == nsGkAtoms::mtable_ && disp->mDisplay == NS_STYLE_DISPLAY_TABLE) { // is an inline-table -- but this isn't yet supported. // What we do here is to wrap the table in an anonymous containing // block so that it can mix better with other surrounding MathML markups // This assumes that the is not positioned or floated. // (MathML does not allow/support positioned or floated elements at all.) // XXXbz once we stop doing this mess, fix IsSpecialContent accordingly. nsStyleContext* parentContext = aParentFrame->GetStyleContext(); nsStyleSet *styleSet = mPresShell->StyleSet(); // first, create a MathML mrow frame that will wrap the block frame nsRefPtr mrowContext; mrowContext = styleSet->ResolvePseudoStyleFor(aContent, nsCSSAnonBoxes::mozMathInline, parentContext); newFrame = NS_NewMathMLmrowFrame(mPresShell, mrowContext); if (NS_UNLIKELY(!newFrame)) { return NS_ERROR_OUT_OF_MEMORY; } InitAndRestoreFrame(aState, aContent, aParentFrame, nsnull, newFrame); nsRefPtr blockContext; blockContext = styleSet->ResolvePseudoStyleFor(aContent, nsCSSAnonBoxes::mozMathMLAnonymousBlock, mrowContext); // then, create a block frame that will wrap the table frame nsIFrame* blockFrame = NS_NewBlockFrame(mPresShell, blockContext, NS_BLOCK_SPACE_MGR | NS_BLOCK_MARGIN_ROOT); if (NS_UNLIKELY(!blockFrame)) { newFrame->Destroy(); return NS_ERROR_OUT_OF_MEMORY; } InitAndRestoreFrame(aState, aContent, newFrame, nsnull, blockFrame); // then, create the table frame itself nsRefPtr tableContext = ResolveStyleContext(blockFrame, aContent); nsFrameItems tempItems; nsIFrame* outerTable; nsIFrame* innerTable; // XXXbz note: since we're constructing a table frame, and it does things // based on whether its parent is a pseudo or not, we need to save our // pseudo state here. This can go away if we switch to a direct // construction of mtable as an inline-table. nsPseudoFrames priorPseudoFrames; aState.mPseudoFrames.Reset(&priorPseudoFrames); // Pass PR_FALSE for aAllowOutOfFlow so that the resulting table will be // guaranteed to be in-flow (and in particular, a descendant of the // in the _frame_ tree). rv = ConstructTableFrame(aState, aContent, blockFrame, tableContext, aNameSpaceID, PR_FALSE, tempItems, PR_FALSE, outerTable, innerTable); // Note: table construction function takes care of initializing the frame, // processing children, and setting the initial child list NS_ASSERTION(aState.mPseudoFrames.IsEmpty(), "How did we end up with pseudo-frames here?"); // restore the incoming pseudo frame state. Note that we MUST do this // before adding things to aFrameItems. aState.mPseudoFrames = priorPseudoFrames; // set the outerTable as the initial child of the anonymous block blockFrame->SetInitialChildList(nsnull, outerTable); // set the block frame as the initial child of the mrow frame newFrame->SetInitialChildList(nsnull, blockFrame); // add the new frame to the flow // XXXbz this is wrong. What if it's out-of-flow? For that matter, this // is putting the frame in the wrong child list in the "pseudoParent == // PR_TRUE" case, which I assume we can hit. aFrameItems.AddChild(newFrame); return rv; } // End CONSTRUCTION of MTABLE elements else if (aTag == nsGkAtoms::math) { // root element const nsStyleDisplay* display = aStyleContext->GetStyleDisplay(); PRBool isBlock = (NS_STYLE_DISPLAY_BLOCK == display->mDisplay); newFrame = NS_NewMathMLmathFrame(mPresShell, isBlock, aStyleContext); } else { return NS_OK; } // If we succeeded in creating a frame then initialize it, process its // children (if requested), and set the initial child list if (newFrame) { // record that children that are ignorable whitespace should be excluded if (ignoreInterTagWhitespace) { newFrame->AddStateBits(NS_FRAME_EXCLUDE_IGNORABLE_WHITESPACE); } // Only elements can be floated or positioned. All other MathML // should be in-flow. PRBool isMath = aTag == nsGkAtoms::math; nsIFrame* geometricParent = isMath ? aState.GetGeometricParent(disp, aParentFrame) : aParentFrame; InitAndRestoreFrame(aState, aContent, geometricParent, nsnull, newFrame); // See if we need to create a view, e.g. the frame is absolutely positioned nsHTMLContainerFrame::CreateViewForFrame(newFrame, aParentFrame, PR_FALSE); rv = aState.AddChild(newFrame, aFrameItems, aContent, aStyleContext, aParentFrame, isMath, isMath); if (NS_FAILED(rv)) { return rv; } // Push a null float containing block to disable floating within mathml nsFrameConstructorSaveState floatSaveState; aState.PushFloatContainingBlock(nsnull, floatSaveState, PR_FALSE, PR_FALSE); // Same for absolute positioning nsFrameConstructorSaveState absoluteSaveState; aState.PushAbsoluteContainingBlock(nsnull, absoluteSaveState); // MathML frames are inline frames, so just process their kids nsFrameItems childItems; if (!newFrame->IsLeaf()) { rv = ProcessChildren(aState, aContent, newFrame, PR_TRUE, childItems, PR_FALSE); } CreateAnonymousFrames(aTag, aState, aContent, newFrame, PR_FALSE, childItems); // Wrap runs of inline children in a block if (NS_SUCCEEDED(rv)) { nsFrameItems newItems; nsFrameItems currentBlock; nsIFrame* f; while ((f = childItems.childList) != nsnull) { PRBool wrapFrame = IsInlineFrame(f) || IsFrameSpecial(f); if (!wrapFrame) { rv = FlushAccumulatedBlock(aState, aContent, newFrame, ¤tBlock, &newItems); if (NS_FAILED(rv)) break; } childItems.RemoveChild(f, nsnull); if (wrapFrame) { currentBlock.AddChild(f); } else { newItems.AddChild(f); } } rv = FlushAccumulatedBlock(aState, aContent, newFrame, ¤tBlock, &newItems); if (childItems.childList) { // an error must have occurred, delete unprocessed frames CleanupFrameReferences(aState.mFrameManager, childItems.childList); nsFrameList(childItems.childList).DestroyFrames(); } childItems = newItems; } // Set the frame's initial child list newFrame->SetInitialChildList(nsnull, childItems.childList); return rv; } else { return NS_ERROR_OUT_OF_MEMORY; } } #endif // MOZ_MATHML // SVG #ifdef MOZ_SVG nsresult nsCSSFrameConstructor::TestSVGConditions(nsIContent* aContent, PRBool& aHasRequiredExtensions, PRBool& aHasRequiredFeatures, PRBool& aHasSystemLanguage) { nsAutoString value; // Only elements can have tests on them if (! aContent->IsNodeOfType(nsINode::eELEMENT)) { aHasRequiredExtensions = PR_FALSE; aHasRequiredFeatures = PR_FALSE; aHasSystemLanguage = PR_FALSE; return NS_OK; } // Required Extensions // // The requiredExtensions attribute defines a list of required language // extensions. Language extensions are capabilities within a user agent that // go beyond the feature set defined in the SVG specification. // Each extension is identified by a URI reference. // For now, claim that mozilla's SVG implementation supports // no extensions. So, if extensions are required, we don't have // them available. Empty-string should always set aHasRequiredExtensions to // false. aHasRequiredExtensions = !aContent->HasAttr(kNameSpaceID_None, nsGkAtoms::requiredExtensions); // Required Features aHasRequiredFeatures = PR_TRUE; if (aContent->GetAttr(kNameSpaceID_None, nsGkAtoms::requiredFeatures, value)) { aHasRequiredFeatures = !value.IsEmpty() && NS_SVG_TestFeatures(value); } // systemLanguage // // Evaluates to "true" if one of the languages indicated by user preferences // exactly equals one of the languages given in the value of this parameter, // or if one of the languages indicated by user preferences exactly equals a // prefix of one of the languages given in the value of this parameter such // that the first tag character following the prefix is "-". aHasSystemLanguage = PR_TRUE; if (aContent->GetAttr(kNameSpaceID_None, nsGkAtoms::systemLanguage, value)) { // Get our language preferences nsAutoString langPrefs(nsContentUtils::GetLocalizedStringPref("intl.accept_languages")); if (!langPrefs.IsEmpty()) { langPrefs.StripWhitespace(); value.StripWhitespace(); #ifdef DEBUG_scooter printf("Calling SVG_TestLanguage('%s','%s')\n", NS_ConvertUTF16toUTF8(value).get(), NS_ConvertUTF16toUTF8(langPrefs).get()); #endif aHasSystemLanguage = SVG_TestLanguage(value, langPrefs); } else { // For now, evaluate to true. NS_WARNING("no default language specified for systemLanguage conditional test"); aHasSystemLanguage = !value.IsEmpty(); } } return NS_OK; } nsresult nsCSSFrameConstructor::SVGSwitchProcessChildren(nsFrameConstructorState& aState, nsIContent* aContent, nsIFrame* aFrame, nsFrameItems& aFrameItems) { nsresult rv = NS_OK; PRBool hasRequiredExtensions = PR_FALSE; PRBool hasRequiredFeatures = PR_FALSE; PRBool hasSystemLanguage = PR_FALSE; // save the incoming pseudo frame state nsPseudoFrames priorPseudoFrames; aState.mPseudoFrames.Reset(&priorPseudoFrames); // The 'switch' element evaluates the requiredFeatures, // requiredExtensions and systemLanguage attributes on its direct child // elements in order, and then processes and renders the first child for // which these attributes evaluate to true. All others will be bypassed and // therefore not rendered. PRInt32 childCount = aContent->GetChildCount(); for (PRInt32 i = 0; i < childCount; ++i) { nsIContent* child = aContent->GetChildAt(i); // Skip over children that aren't elements if (!child->IsNodeOfType(nsINode::eELEMENT)) { continue; } rv = TestSVGConditions(child, hasRequiredExtensions, hasRequiredFeatures, hasSystemLanguage); #ifdef DEBUG_scooter nsAutoString str; child->Tag()->ToString(str); printf("Child tag: %s\n", NS_ConvertUTF16toUTF8(str).get()); printf("SwitchProcessChildren: Required Extensions = %s, Required Features = %s, System Language = %s\n", hasRequiredExtensions ? "true" : "false", hasRequiredFeatures ? "true" : "false", hasSystemLanguage ? "true" : "false"); #endif if (NS_FAILED(rv)) return rv; if (hasRequiredExtensions && hasRequiredFeatures && hasSystemLanguage) { rv = ConstructFrame(aState, child, aFrame, aFrameItems); if (NS_FAILED(rv)) return rv; // No errors -- break out of loop (only render the first matching element) break; } } // process the current pseudo frame state if (!aState.mPseudoFrames.IsEmpty()) { ProcessPseudoFrames(aState, aFrameItems); } // restore the incoming pseudo frame state aState.mPseudoFrames = priorPseudoFrames; return rv; } nsresult nsCSSFrameConstructor::ConstructSVGFrame(nsFrameConstructorState& aState, nsIContent* aContent, nsIFrame* aParentFrame, nsIAtom* aTag, PRInt32 aNameSpaceID, nsStyleContext* aStyleContext, nsFrameItems& aFrameItems, PRBool aHasPseudoParent, PRBool* aHaltProcessing) { NS_ASSERTION(aNameSpaceID == kNameSpaceID_SVG, "SVG frame constructed in wrong namespace"); *aHaltProcessing = PR_FALSE; nsresult rv = NS_OK; PRBool forceView = PR_FALSE; PRBool isOuterSVGNode = PR_FALSE; const nsStyleDisplay* disp = aStyleContext->GetStyleDisplay(); NS_ASSERTION(aTag != nsnull, "null SVG tag"); if (aTag == nsnull) return NS_OK; // XXXbz somewhere here we should process pseudo frames if !aHasPseudoParent // Initialize the new frame nsIFrame* newFrame = nsnull; // Default to aParentFrame for the geometricParent; it's adjusted in // cases when we allow anything else. nsIFrame* geometricParent = aParentFrame; PRBool parentIsSVG = PR_FALSE; if (aParentFrame && aParentFrame->GetContent()) { PRInt32 parentNSID; nsIAtom* parentTag = mDocument->BindingManager()->ResolveTag(aParentFrame->GetContent(), &parentNSID); parentIsSVG = parentNSID == kNameSpaceID_SVG #ifdef MOZ_SVG_FOREIGNOBJECT // It's not clear whether the SVG spec intends to allow any SVG // content within svg:foreignObject at all (SVG 1.1, section // 23.2), but if it does, it better be svg:svg. So given that // we're allowing it, treat it as a non-SVG parent. && parentTag != nsGkAtoms::foreignObject #endif ; } if ((aTag != nsGkAtoms::svg && !parentIsSVG) || (aTag == nsGkAtoms::desc || aTag == nsGkAtoms::title)) { // Sections 5.1 and G.4 of SVG 1.1 say that SVG elements other than // svg:svg not contained within svg:svg are incorrect, although they // don't seem to specify error handling. Ignore them, since many of // our frame classes can't deal. It *may* be that the document // should at that point be considered in error according to F.2, but // it's hard to tell. // // Style mutation can't change this situation, so don't bother // adding to the undisplayed content map. // // We don't currently handle any UI for desc/title *aHaltProcessing = PR_TRUE; return NS_OK; } // Are we another child of a switch which already has a child if (aParentFrame && aParentFrame->GetType() == nsGkAtoms::svgSwitch && aParentFrame->GetFirstChild(nsnull)) { *aHaltProcessing = PR_TRUE; return NS_OK; } // See if this element supports conditionals & if it does, // handle it if (((aContent->HasAttr(kNameSpaceID_None, nsGkAtoms::requiredFeatures) || aContent->HasAttr(kNameSpaceID_None, nsGkAtoms::requiredExtensions)) && NS_SVG_TestsSupported(aTag)) || (aContent->HasAttr(kNameSpaceID_None, nsGkAtoms::systemLanguage) && NS_SVG_LangSupported(aTag))) { PRBool hasRequiredExtentions = PR_FALSE; PRBool hasRequiredFeatures = PR_FALSE; PRBool hasSystemLanguage = PR_FALSE; TestSVGConditions(aContent, hasRequiredExtentions, hasRequiredFeatures, hasSystemLanguage); // Note that just returning is probably not right. According // to the spec, is allowed to use an element that fails its // conditional, but because we never actually create the frame when // a conditional fails and when we use GetReferencedFrame to find the // references, things don't work right. // XXX FIXME XXX if (!hasRequiredExtentions || !hasRequiredFeatures || !hasSystemLanguage) { *aHaltProcessing = PR_TRUE; return NS_OK; } } // Make sure to keep IsSpecialContent in synch with this code if (aTag == nsGkAtoms::svg) { if (!parentIsSVG) { // This is the outermost element. isOuterSVGNode = PR_TRUE; // Set the right geometricParent geometricParent = aState.GetGeometricParent(disp, aParentFrame); forceView = PR_TRUE; newFrame = NS_NewSVGOuterSVGFrame(mPresShell, aContent, aStyleContext); } else { // This is an inner element newFrame = NS_NewSVGInnerSVGFrame(mPresShell, aContent, aStyleContext); } } else if (aTag == nsGkAtoms::g || aTag == nsGkAtoms::svgSwitch) { newFrame = NS_NewSVGGFrame(mPresShell, aContent, aStyleContext); } else if (aTag == nsGkAtoms::polygon || aTag == nsGkAtoms::polyline || aTag == nsGkAtoms::circle || aTag == nsGkAtoms::ellipse || aTag == nsGkAtoms::line || aTag == nsGkAtoms::rect || aTag == nsGkAtoms::path) newFrame = NS_NewSVGPathGeometryFrame(mPresShell, aContent, aStyleContext); else if (aTag == nsGkAtoms::defs) { newFrame = NS_NewSVGContainerFrame(mPresShell, aContent, aStyleContext); } #ifdef MOZ_SVG_FOREIGNOBJECT else if (aTag == nsGkAtoms::foreignObject) { newFrame = NS_NewSVGForeignObjectFrame(mPresShell, aContent, aStyleContext); } #endif else if (aTag == nsGkAtoms::a) { newFrame = NS_NewSVGAFrame(mPresShell, aContent, aStyleContext); } else if (aTag == nsGkAtoms::text) { newFrame = NS_NewSVGTextFrame(mPresShell, aContent, aStyleContext); } else if (aTag == nsGkAtoms::tspan) { nsIFrame *ancestorFrame = SVG_GetFirstNonAAncestorFrame(aParentFrame); if (ancestorFrame) { nsISVGTextContentMetrics* metrics; CallQueryInterface(ancestorFrame, &metrics); if (metrics) newFrame = NS_NewSVGTSpanFrame(mPresShell, aContent, ancestorFrame, aStyleContext); } } else if (aTag == nsGkAtoms::linearGradient) { newFrame = NS_NewSVGLinearGradientFrame(mPresShell, aContent, aStyleContext); } else if (aTag == nsGkAtoms::radialGradient) { newFrame = NS_NewSVGRadialGradientFrame(mPresShell, aContent, aStyleContext); } else if (aTag == nsGkAtoms::stop) { newFrame = NS_NewSVGStopFrame(mPresShell, aContent, aParentFrame, aStyleContext); } else if (aTag == nsGkAtoms::use) { newFrame = NS_NewSVGUseFrame(mPresShell, aContent, aStyleContext); } else if (aTag == nsGkAtoms::marker) { newFrame = NS_NewSVGMarkerFrame(mPresShell, aContent, aStyleContext); } else if (aTag == nsGkAtoms::image) { newFrame = NS_NewSVGImageFrame(mPresShell, aContent, aStyleContext); } else if (aTag == nsGkAtoms::clipPath) { newFrame = NS_NewSVGClipPathFrame(mPresShell, aContent, aStyleContext); } else if (aTag == nsGkAtoms::textPath) { nsIFrame *ancestorFrame = SVG_GetFirstNonAAncestorFrame(aParentFrame); if (ancestorFrame && ancestorFrame->GetType() == nsGkAtoms::svgTextFrame) { newFrame = NS_NewSVGTextPathFrame(mPresShell, aContent, ancestorFrame, aStyleContext); } } else if (aTag == nsGkAtoms::filter) { newFrame = NS_NewSVGFilterFrame(mPresShell, aContent, aStyleContext); } else if (aTag == nsGkAtoms::pattern) { newFrame = NS_NewSVGPatternFrame(mPresShell, aContent, aStyleContext); } else if (aTag == nsGkAtoms::mask) { newFrame = NS_NewSVGMaskFrame(mPresShell, aContent, aStyleContext); } else if (aTag == nsGkAtoms::feDistantLight || aTag == nsGkAtoms::fePointLight || aTag == nsGkAtoms::feSpotLight || aTag == nsGkAtoms::feBlend || aTag == nsGkAtoms::feColorMatrix || aTag == nsGkAtoms::feFuncR || aTag == nsGkAtoms::feFuncG || aTag == nsGkAtoms::feFuncB || aTag == nsGkAtoms::feFuncA || aTag == nsGkAtoms::feComposite || aTag == nsGkAtoms::feConvolveMatrix || aTag == nsGkAtoms::feDisplacementMap || aTag == nsGkAtoms::feFlood || aTag == nsGkAtoms::feGaussianBlur || aTag == nsGkAtoms::feImage || aTag == nsGkAtoms::feMergeNode || aTag == nsGkAtoms::feMorphology || aTag == nsGkAtoms::feOffset || aTag == nsGkAtoms::feTile || aTag == nsGkAtoms::feTurbulence) { // We don't really use the frame, just need it for the style // information, so create the simplest possible frame. newFrame = NS_NewSVGLeafFrame(mPresShell, aStyleContext); } if (newFrame == nsnull) { // Either we have an unknown tag, or construction of a frame // failed. One reason why frame construction for a known tag might // have failed is that the content element doesn't implement all // interfaces required by the frame. This happens e.g. when using // 'extends' in xbl to extend an xbl binding from an svg // element. In that case, the bound content element will always be // a standard xml element, and not be of the right type. // The best we can do here is to create a generic svg container frame. // XXXldb This really isn't what the SVG spec says to do. #ifdef DEBUG // printf("Warning: Creating SVGGenericContainerFrame for tag <"); // nsAutoString str; // aTag->ToString(str); // printf("%s>\n", NS_ConvertUTF16toUTF8(str).get()); #endif newFrame = NS_NewSVGGenericContainerFrame(mPresShell, aContent, aStyleContext); } // If we succeeded in creating a frame then initialize it, process its // children (if requested), and set the initial child list if (newFrame != nsnull) { InitAndRestoreFrame(aState, aContent, geometricParent, nsnull, newFrame); nsHTMLContainerFrame::CreateViewForFrame(newFrame, aParentFrame, forceView); rv = aState.AddChild(newFrame, aFrameItems, aContent, aStyleContext, aParentFrame, isOuterSVGNode, isOuterSVGNode); if (NS_FAILED(rv)) { return rv; } nsFrameItems childItems; #ifdef MOZ_SVG_FOREIGNOBJECT if (aTag == nsGkAtoms::foreignObject) { // Resolve pseudo style and create an inner block frame // XXX this breaks style inheritance nsRefPtr innerPseudoStyle; innerPseudoStyle = mPresShell->StyleSet()-> ResolvePseudoStyleFor(aContent, nsCSSAnonBoxes::mozSVGForeignContent, aStyleContext); nsIFrame* blockFrame = NS_NewBlockFrame(mPresShell, innerPseudoStyle, NS_BLOCK_SPACE_MGR | NS_BLOCK_MARGIN_ROOT); if (NS_UNLIKELY(!blockFrame)) return NS_ERROR_OUT_OF_MEMORY; // Claim to be relatively positioned so that we end up being the // absolute containing block. nsFrameConstructorSaveState saveState; aState.PushFloatContainingBlock(nsnull, saveState, PR_FALSE, PR_FALSE); rv = ConstructBlock(aState, innerPseudoStyle->GetStyleDisplay(), aContent, newFrame, newFrame, innerPseudoStyle, &blockFrame, childItems, PR_TRUE); // Give the blockFrame a view so that GetOffsetTo works for descendants // of blockFrame with views... nsHTMLContainerFrame::CreateViewForFrame(blockFrame, nsnull, PR_TRUE); } else #endif // MOZ_SVG_FOREIGNOBJECT { // Process the child content if requested. if (!newFrame->IsLeaf()) { if (aTag == nsGkAtoms::svgSwitch) { rv = SVGSwitchProcessChildren(aState, aContent, newFrame, childItems); } else { rv = ProcessChildren(aState, aContent, newFrame, PR_TRUE, childItems, PR_FALSE); } } CreateAnonymousFrames(aTag, aState, aContent, newFrame, PR_FALSE, childItems); } // Set the frame's initial child list newFrame->SetInitialChildList(nsnull, childItems.childList); return rv; } else { return NS_ERROR_FAILURE; } } #endif // MOZ_SVG PRBool nsCSSFrameConstructor::PageBreakBefore(nsFrameConstructorState& aState, nsIContent* aContent, nsIFrame* aParentFrame, nsStyleContext* aStyleContext, nsFrameItems& aFrameItems) { const nsStyleDisplay* display = aStyleContext->GetStyleDisplay(); // See if page-break-before is set for all elements except row groups, rows, cells // (these are handled internally by tables) and construct a page break frame if so. if (NS_STYLE_DISPLAY_NONE != display->mDisplay && (NS_STYLE_DISPLAY_TABLE == display->mDisplay || !IsTableRelated(display->mDisplay, PR_TRUE))) { if (display->mBreakBefore) { ConstructPageBreakFrame(aState, aContent, aParentFrame, aStyleContext, aFrameItems); } return display->mBreakAfter; } return PR_FALSE; } nsresult nsCSSFrameConstructor::ConstructPageBreakFrame(nsFrameConstructorState& aState, nsIContent* aContent, nsIFrame* aParentFrame, nsStyleContext* aStyleContext, nsFrameItems& aFrameItems) { nsRefPtr pseudoStyle; pseudoStyle = mPresShell->StyleSet()->ResolvePseudoStyleFor(nsnull, nsCSSAnonBoxes::pageBreak, aStyleContext); nsIFrame* pageBreakFrame = NS_NewPageBreakFrame(mPresShell, pseudoStyle); if (pageBreakFrame) { InitAndRestoreFrame(aState, aContent, aParentFrame, nsnull, pageBreakFrame); aFrameItems.AddChild(pageBreakFrame); return NS_OK; } else { return NS_ERROR_OUT_OF_MEMORY; } } nsresult nsCSSFrameConstructor::ConstructFrame(nsFrameConstructorState& aState, nsIContent* aContent, nsIFrame* aParentFrame, nsFrameItems& aFrameItems) { NS_PRECONDITION(nsnull != aParentFrame, "no parent frame"); nsresult rv = NS_OK; // don't create a whitespace frame if aParent doesn't want it if (!NeedFrameFor(aParentFrame, aContent)) { return rv; } // never create frames for comments or PIs if (aContent->IsNodeOfType(nsINode::eCOMMENT) || aContent->IsNodeOfType(nsINode::ePROCESSING_INSTRUCTION)) return rv; nsRefPtr styleContext; styleContext = ResolveStyleContext(aParentFrame, aContent); PRBool pageBreakAfter = PR_FALSE; if (aState.mPresContext->IsPaginated()) { // See if there is a page break before, if so construct one. Also see if there is one after pageBreakAfter = PageBreakBefore(aState, aContent, aParentFrame, styleContext, aFrameItems); } // construct the frame rv = ConstructFrameInternal(aState, aContent, aParentFrame, aContent->Tag(), aContent->GetNameSpaceID(), styleContext, aFrameItems, PR_FALSE); if (NS_SUCCEEDED(rv) && pageBreakAfter) { // Construct the page break after ConstructPageBreakFrame(aState, aContent, aParentFrame, styleContext, aFrameItems); } return rv; } nsresult nsCSSFrameConstructor::ConstructFrameInternal( nsFrameConstructorState& aState, nsIContent* aContent, nsIFrame* aParentFrame, nsIAtom* aTag, PRInt32 aNameSpaceID, nsStyleContext* aStyleContext, nsFrameItems& aFrameItems, PRBool aXBLBaseTag) { // The following code allows the user to specify the base tag // of an element using XBL. XUL and HTML objects (like boxes, menus, etc.) // can then be extended arbitrarily. const nsStyleDisplay* display = aStyleContext->GetStyleDisplay(); nsRefPtr styleContext(aStyleContext); nsAutoEnqueueBinding binding(mDocument); if (!aXBLBaseTag) { // Ensure that our XBL bindings are installed. if (display->mBinding) { // Get the XBL loader. nsresult rv; // Load the bindings. PRBool resolveStyle; nsIXBLService * xblService = GetXBLService(); if (!xblService) return NS_ERROR_FAILURE; rv = xblService->LoadBindings(aContent, display->mBinding->mURI, display->mBinding->mOriginPrincipal, PR_FALSE, getter_AddRefs(binding.mBinding), &resolveStyle); if (NS_FAILED(rv)) return NS_OK; if (resolveStyle) { styleContext = ResolveStyleContext(aParentFrame, aContent); display = styleContext->GetStyleDisplay(); } PRInt32 nameSpaceID; nsCOMPtr baseTag = mDocument->BindingManager()->ResolveTag(aContent, &nameSpaceID); if (baseTag != aTag || aNameSpaceID != nameSpaceID) { // Construct the frame using the XBL base tag. rv = ConstructFrameInternal(aState, aContent, aParentFrame, baseTag, nameSpaceID, styleContext, aFrameItems, PR_TRUE); return rv; } } } // Pre-check for display "none" - if we find that, don't create // any frame at all if (NS_STYLE_DISPLAY_NONE == display->mDisplay) { aState.mFrameManager->SetUndisplayedContent(aContent, styleContext); return NS_OK; } nsIFrame* adjParentFrame = aParentFrame; nsFrameItems* frameItems = &aFrameItems; PRBool pseudoParent = PR_FALSE; PRBool suppressFrame = PR_FALSE; nsFrameConstructorSaveState pseudoSaveState; nsresult rv = AdjustParentFrame(aState, aContent, adjParentFrame, aTag, aNameSpaceID, styleContext, frameItems, pseudoSaveState, suppressFrame, pseudoParent); if (NS_FAILED(rv) || suppressFrame) { return rv; } if (aContent->IsNodeOfType(nsINode::eTEXT)) return ConstructTextFrame(aState, aContent, adjParentFrame, styleContext, *frameItems, pseudoParent); #ifdef MOZ_SVG // Don't create frames for non-SVG children of SVG elements if (aNameSpaceID != kNameSpaceID_SVG && aParentFrame && aParentFrame->IsFrameOfType(nsIFrame::eSVG) #ifdef MOZ_SVG_FOREIGNOBJECT && !aParentFrame->IsFrameOfType(nsIFrame::eSVGForeignObject) #endif ) { return NS_OK; } #endif // Style resolution can normally happen lazily. However, getting the // Visibility struct can cause |SetBidiEnabled| to be called on the // pres context, and this needs to happen before we start reflow, so // do it now, when constructing frames. See bug 115921. { styleContext->GetStyleVisibility(); } // Start background loads during frame construction. This is just // a hint; the paint code will do the right thing in any case. { styleContext->GetStyleBackground(); } nsIFrame* lastChild = frameItems->lastChild; // Handle specific frame types rv = ConstructHTMLFrame(aState, aContent, adjParentFrame, aTag, aNameSpaceID, styleContext, *frameItems, pseudoParent); // Failing to find a matching HTML frame, try creating a specialized // XUL frame. This is temporary, pending planned factoring of this // whole process into separate, pluggable steps. if (NS_SUCCEEDED(rv) && (!frameItems->childList || lastChild == frameItems->lastChild)) { PRBool haltProcessing; rv = ConstructXULFrame(aState, aContent, adjParentFrame, aTag, aNameSpaceID, styleContext, *frameItems, aXBLBaseTag, pseudoParent, &haltProcessing); if (haltProcessing) { return rv; } } // MathML Mod - RBS #ifdef MOZ_MATHML if (NS_SUCCEEDED(rv) && (!frameItems->childList || lastChild == frameItems->lastChild)) { rv = ConstructMathMLFrame(aState, aContent, adjParentFrame, aTag, aNameSpaceID, styleContext, *frameItems, pseudoParent); } #endif // SVG #ifdef MOZ_SVG if (NS_SUCCEEDED(rv) && (!frameItems->childList || lastChild == frameItems->lastChild) && aNameSpaceID == kNameSpaceID_SVG && NS_SVGEnabled()) { PRBool haltProcessing; rv = ConstructSVGFrame(aState, aContent, adjParentFrame, aTag, aNameSpaceID, styleContext, *frameItems, pseudoParent, &haltProcessing); if (haltProcessing) { return rv; } } #endif if (NS_SUCCEEDED(rv) && (!frameItems->childList || lastChild == frameItems->lastChild)) { // When there is no explicit frame to create, assume it's a // container and let display style dictate the rest rv = ConstructFrameByDisplayType(aState, display, aContent, aNameSpaceID, aTag, adjParentFrame, styleContext, *frameItems, pseudoParent); } return rv; } inline PRBool IsRootBoxFrame(nsIFrame *aFrame) { return (aFrame->GetType() == nsGkAtoms::rootFrame); } nsresult nsCSSFrameConstructor::ReconstructDocElementHierarchy() { AUTO_LAYOUT_PHASE_ENTRY_POINT(mPresShell->GetPresContext(), FrameC); return ReconstructDocElementHierarchyInternal(); } nsresult nsCSSFrameConstructor::ReconstructDocElementHierarchyInternal() { #ifdef DEBUG if (gNoisyContentUpdates) { printf("nsCSSFrameConstructor::ReconstructDocElementHierarchy\n"); } #endif nsresult rv = NS_OK; // XXXbz is that null-check needed? Why? if (mDocument && mPresShell) { nsIContent *rootContent = mDocument->GetRootContent(); if (rootContent) { // Before removing the frames associated with the content object, ask them to save their // state onto a temporary state object. CaptureStateForFramesOf(rootContent, mTempFrameTreeState); nsFrameConstructorState state(mPresShell, mFixedContainingBlock, nsnull, nsnull, mTempFrameTreeState); // Get the frame that corresponds to the document element nsIFrame* docElementFrame = state.mFrameManager->GetPrimaryFrameFor(rootContent, -1); // Remove any existing fixed items: they are always on the // FixedContainingBlock. Note that this has to be done before we call // ClearPlaceholderFrameMap(), since RemoveFixedItems uses the // placeholder frame map. rv = RemoveFixedItems(state); if (NS_SUCCEEDED(rv)) { // Clear the hash tables that map from content to frame and out-of-flow // frame to placeholder frame state.mFrameManager->ClearPrimaryFrameMap(); state.mFrameManager->ClearPlaceholderFrameMap(); state.mFrameManager->ClearUndisplayedContentMap(); if (docElementFrame) { // Take the docElementFrame, and remove it from its parent. // XXXbz So why can't we reuse ContentRemoved? NS_ASSERTION(docElementFrame->GetParent() == mDocElementContainingBlock, "Unexpected doc element parent frame"); // Notify self that we will destroy the entire frame tree, this blocks // RemoveMappingsForFrameSubtree() which would otherwise lead to a // crash since we cleared the placeholder map above (bug 398982). PRBool wasDestroyingFrameTree = mIsDestroyingFrameTree; WillDestroyFrameTree(); // Remove the old document element hieararchy rv = state.mFrameManager->RemoveFrame(mDocElementContainingBlock, nsnull, docElementFrame); mIsDestroyingFrameTree = wasDestroyingFrameTree; if (NS_FAILED(rv)) { return rv; } } // Create the new document element hierarchy nsIFrame* newChild; rv = ConstructDocElementFrame(state, rootContent, mDocElementContainingBlock, &newChild); // newChild could be null even if |rv| is success, thanks to XBL. if (NS_SUCCEEDED(rv) && newChild) { rv = state.mFrameManager->InsertFrames(mDocElementContainingBlock, nsnull, nsnull, newChild); } } } } return rv; } nsIFrame* nsCSSFrameConstructor::GetFrameFor(nsIContent* aContent) { // Get the primary frame associated with the content nsIFrame* frame = mPresShell->GetPrimaryFrameFor(aContent); if (!frame) return nsnull; nsIFrame* insertionFrame = frame->GetContentInsertionFrame(); NS_ASSERTION(insertionFrame == frame || !frame->IsLeaf(), "The insertion frame is the primary frame or the primary frame isn't a leaf"); return insertionFrame; } nsIFrame* nsCSSFrameConstructor::GetAbsoluteContainingBlock(nsIFrame* aFrame) { NS_PRECONDITION(nsnull != mInitialContainingBlock, "no initial containing block"); // Starting with aFrame, look for a frame that is absolutely positioned or // relatively positioned nsIFrame* containingBlock = nsnull; for (nsIFrame* frame = aFrame; frame && !containingBlock; frame = frame->GetParent()) { if (frame->IsFrameOfType(nsIFrame::eMathML)) { // If it's mathml, bail out -- no absolute positioning out from inside // mathml frames. Note that we don't make this part of the loop // condition because of the mInitialContainingBlock stuff at the // end of this method... return nsnull; } // Is it positioned? // If it's table-related then ignore it, because for the time // being table-related frames are not containers for absolutely // positioned child frames. const nsStyleDisplay* disp = frame->GetStyleDisplay(); if (disp->IsPositioned() && !IsTableRelated(disp->mDisplay, PR_TRUE)) { // Find the outermost wrapped block under this frame for (nsIFrame* wrappedFrame = aFrame; wrappedFrame != frame->GetParent(); wrappedFrame = wrappedFrame->GetParent()) { nsIAtom* frameType = wrappedFrame->GetType(); if (nsGkAtoms::areaFrame == frameType || nsGkAtoms::blockFrame == frameType || nsGkAtoms::positionedInlineFrame == frameType) { containingBlock = wrappedFrame; } else if (nsGkAtoms::fieldSetFrame == frameType) { // If the positioned frame is a fieldset, use the area frame inside it. // We don't use GetContentInsertionFrame for fieldsets yet. containingBlock = GetFieldSetAreaFrame(wrappedFrame); } } #ifdef DEBUG if (!containingBlock) NS_WARNING("Positioned frame that does not handle positioned kids; looking further up the parent chain"); #endif } } // If we found an absolutely positioned containing block, then use the // first-continuation. if (containingBlock) return AdjustAbsoluteContainingBlock(containingBlock); // If we didn't find it, then use the initial containing block if it // supports abs pos kids. return mInitialContainingBlockIsAbsPosContainer ? mInitialContainingBlock : nsnull; } nsIFrame* nsCSSFrameConstructor::GetFloatContainingBlock(nsIFrame* aFrame) { NS_PRECONDITION(mInitialContainingBlock, "no initial containing block"); // Starting with aFrame, look for a frame that is a float containing block. // IF we hit a mathml frame, bail out; we don't allow floating out of mathml // frames, because they don't seem to be able to deal. for (nsIFrame* containingBlock = aFrame; containingBlock && !containingBlock->IsFrameOfType(nsIFrame::eMathML) && !containingBlock->IsBoxFrame(); containingBlock = containingBlock->GetParent()) { if (containingBlock->IsFloatContainingBlock()) { return containingBlock; } } // If we didn't find a containing block, then there just isn't // one.... return null return nsnull; } /** * This function will check whether aContainer has :after generated content. * If so, appending to it should actually insert. The return value is the * parent to use for newly-appended content. *aAfterFrame points to the :after * frame before which appended content should go, if there is one. */ static nsIFrame* AdjustAppendParentForAfterContent(nsPresContext* aPresContext, nsIContent* aContainer, nsIFrame* aParentFrame, nsIFrame** aAfterFrame) { // See if the parent has an :after pseudo-element. Check for the presence // of style first, since nsLayoutUtils::GetAfterFrame is sorta expensive. nsStyleContext* parentStyle = aParentFrame->GetStyleContext(); if (nsLayoutUtils::HasPseudoStyle(aContainer, parentStyle, nsCSSPseudoElements::after, aPresContext)) { nsIFrame* afterFrame = nsLayoutUtils::GetAfterFrame(aParentFrame); if (afterFrame) { *aAfterFrame = afterFrame; return afterFrame->GetParent(); } } *aAfterFrame = nsnull; return aParentFrame; } /** * This function is called by ContentAppended() and ContentInserted() * when appending flowed frames to a parent's principal child list. It * handles the case where the parent frame has :after pseudo-element * generated content. */ nsresult nsCSSFrameConstructor::AppendFrames(nsFrameConstructorState& aState, nsIContent* aContainer, nsIFrame* aParentFrame, nsFrameItems& aFrameList, nsIFrame* aAfterFrame) { #ifdef DEBUG nsIFrame* debugAfterFrame; nsIFrame* debugNewParent = ::AdjustAppendParentForAfterContent(aState.mPresContext, aContainer, aParentFrame, &debugAfterFrame); NS_ASSERTION(debugNewParent == aParentFrame, "Incorrect parent"); NS_ASSERTION(debugAfterFrame == aAfterFrame, "Incorrect after frame"); #endif nsFrameManager* frameManager = aState.mFrameManager; if (aAfterFrame) { NS_ASSERTION(!IsFrameSpecial(aParentFrame) || IsInlineFrame(aParentFrame) || !IsInlineOutside(aAfterFrame), "Shouldn't have inline :after content on the block in an " "{ib} split"); nsFrameList frames(aParentFrame->GetFirstChild(nsnull)); // Insert the frames before the :after pseudo-element. return frameManager->InsertFrames(aParentFrame, nsnull, frames.GetPrevSiblingFor(aAfterFrame), aFrameList.childList); } if (IsFrameSpecial(aParentFrame) && !IsInlineFrame(aParentFrame) && IsInlineOutside(aFrameList.lastChild)) { NS_ASSERTION(!aParentFrame->GetNextContinuation(), "Shouldn't happen"); // We want to put some of the frames into the following inline frame. nsIFrame* lastBlock = FindLastBlock(aFrameList.childList); nsIFrame* firstTrailingInline; if (lastBlock) { firstTrailingInline = lastBlock->GetNextSibling(); lastBlock->SetNextSibling(nsnull); aFrameList.lastChild = lastBlock; } else { firstTrailingInline = aFrameList.childList; aFrameList = nsFrameItems(); } NS_ASSERTION(firstTrailingInline, "How did that happen?"); nsIFrame* parentFrame = aParentFrame; // As we go up the tree creating trailing inlines, we have to move floats // up to ancestor blocks. This means that at any given time we'll be // working with two frame constructor states, and aState is one of the two // only at the first step. Create some space to do this so we don't have // to allocate as we go. char stateBuf[2 * sizeof(nsFrameConstructorState)]; nsFrameConstructorState* sourceState = &aState; nsFrameConstructorState* targetState = reinterpret_cast(stateBuf); // Now we loop, because it might be the case that the parent of our special // block is another special block, and that we're at the very end of it, // and in that case if we create a new special inline we'll have to create // a parent for it too. do { NS_ASSERTION(IsFrameSpecial(parentFrame) && !IsInlineFrame(parentFrame), "Shouldn't be in this code"); nsIFrame* inlineSibling = GetSpecialSibling(parentFrame); PRBool isPositioned = PR_FALSE; nsIContent* content = nsnull; nsStyleContext* styleContext = nsnull; if (!inlineSibling) { nsIFrame* firstInline = GetIBSplitSpecialPrevSibling(parentFrame); NS_ASSERTION(firstInline, "How did that happen?"); content = firstInline->GetContent(); styleContext = firstInline->GetStyleContext(); isPositioned = (styleContext->GetStyleDisplay()->mPosition == NS_STYLE_POSITION_RELATIVE); } nsIFrame* stateParent = inlineSibling ? inlineSibling->GetParent() : parentFrame->GetParent(); new (targetState) nsFrameConstructorState(mPresShell, mFixedContainingBlock, GetAbsoluteContainingBlock(stateParent), GetFloatContainingBlock(stateParent)); nsIFrame* newInlineSibling = MoveFramesToEndOfIBSplit(*sourceState, inlineSibling, isPositioned, content, styleContext, firstTrailingInline, parentFrame, targetState); if (sourceState == &aState) { NS_ASSERTION(targetState == reinterpret_cast(stateBuf), "Bogus target state?"); // Set sourceState to the value targetState should have next. sourceState = targetState + 1; } else { // Go ahead and process whatever insertions we didn't move out sourceState->~nsFrameConstructorState(); } // We're done with the source state. The target becomes the new source, // and we point the target pointer to the available memory. nsFrameConstructorState* temp = sourceState; sourceState = targetState; targetState = temp;; if (inlineSibling) { // we're all set -- we just moved things to a frame that was already // there. NS_ASSERTION(newInlineSibling == inlineSibling, "What happened?"); break; } SetFrameIsSpecial(parentFrame->GetFirstContinuation(), newInlineSibling); // We had to create a frame for this new inline sibling. Figure out // the right parentage for it. // XXXbz add a test for this? nsIFrame* newParentFrame = parentFrame->GetParent(); NS_ASSERTION(!IsInlineFrame(newParentFrame), "The block in an {ib} split shouldn't be living inside " "an inline"); if (!IsFrameSpecial(newParentFrame) || newParentFrame->GetNextContinuation() || parentFrame->GetNextSibling()) { // Just insert after parentFrame frameManager->InsertFrames(newParentFrame, nsnull, parentFrame, newInlineSibling); firstTrailingInline = nsnull; } else { // recurse up the tree parentFrame = newParentFrame; firstTrailingInline = newInlineSibling; } } while (firstTrailingInline); // Process the float insertions on the last target state we had. sourceState->~nsFrameConstructorState(); } if (!aFrameList.childList) { // It all got eaten by the special inline return NS_OK; } return frameManager->AppendFrames(aParentFrame, nsnull, aFrameList.childList); } #define UNSET_DISPLAY 255 nsIFrame* nsCSSFrameConstructor::FindPreviousAnonymousSibling(nsIContent* aContainer, nsIContent* aChild) { nsCOMPtr xblDoc(do_QueryInterface(mDocument)); NS_ASSERTION(xblDoc, "null xblDoc for content element in FindNextAnonymousSibling"); if (! xblDoc) return nsnull; // Grovel through the anonymous elements looking for aChild. We'll // start our search for a previous frame there. nsCOMPtr nodeList; nsCOMPtr elt(do_QueryInterface(aContainer)); xblDoc->GetAnonymousNodes(elt, getter_AddRefs(nodeList)); if (! nodeList) return nsnull; PRUint32 length; nodeList->GetLength(&length); PRInt32 index; for (index = PRInt32(length) - 1; index >= 0; --index) { nsCOMPtr node; nodeList->Item(PRUint32(index), getter_AddRefs(node)); nsCOMPtr child = do_QueryInterface(node); if (child == aChild) break; } // We want the node immediately before aChild. Keep going until we // run off the beginning of the nodeList, or we find a frame. PRUint8 childDisplay = UNSET_DISPLAY; while (--index >= 0) { nsCOMPtr node; nodeList->Item(PRUint32(index), getter_AddRefs(node)); nsCOMPtr child = do_QueryInterface(node); // Get its frame. If it doesn't have one, continue on to the // anonymous element that preceded it. nsIFrame* prevSibling = FindFrameForContentSibling(child, aChild, childDisplay, PR_TRUE); if (prevSibling) { // Found a previous sibling, we're done! return prevSibling; } } return nsnull; } /** * Find the frame for the anonymous content immediately following * aChild. */ nsIFrame* nsCSSFrameConstructor::FindNextAnonymousSibling(nsIContent* aContainer, nsIContent* aChild) { nsCOMPtr xblDoc(do_QueryInterface(mDocument)); NS_ASSERTION(xblDoc, "null xblDoc for content element in FindNextAnonymousSibling"); if (! xblDoc) return nsnull; // Grovel through the anonymous elements looking for aChild nsCOMPtr nodeList; nsCOMPtr elt(do_QueryInterface(aContainer)); xblDoc->GetAnonymousNodes(elt, getter_AddRefs(nodeList)); if (! nodeList) return nsnull; PRUint32 length; nodeList->GetLength(&length); PRInt32 index; for (index = 0; index < PRInt32(length); ++index) { nsCOMPtr node; nodeList->Item(PRUint32(index), getter_AddRefs(node)); nsCOMPtr child = do_QueryInterface(node); if (child == aChild) break; } // We want the node immediately after aChild. Keep going until we // run off the end of the nodeList, or we find a next sibling. PRUint8 childDisplay = UNSET_DISPLAY; while (++index < PRInt32(length)) { nsCOMPtr node; nodeList->Item(PRUint32(index), getter_AddRefs(node)); nsCOMPtr child = do_QueryInterface(node); // Get its frame nsIFrame* nextSibling = FindFrameForContentSibling(child, aChild, childDisplay, PR_FALSE); if (nextSibling) { // Found a next sibling, we're done! return nextSibling; } } return nsnull; } // This gets called to see if the frames corresponding to aSiblingDisplay and aDisplay // should be siblings in the frame tree. Although (1) rows and cols, (2) row groups // and col groups, (3) row groups and captions, (4) legends and content inside fieldsets, (5) popups and other kids of the menu // are siblings from a content perspective, they are not considered siblings in the // frame tree. PRBool nsCSSFrameConstructor::IsValidSibling(nsIFrame* aSibling, nsIContent* aContent, PRUint8& aDisplay) { nsIFrame* parentFrame = aSibling->GetParent(); nsIAtom* parentType = nsnull; nsIAtom* grandparentType = nsnull; if (parentFrame) { parentType = parentFrame->GetType(); nsIFrame* grandparentFrame = parentFrame->GetParent(); if (grandparentFrame) { grandparentType = grandparentFrame->GetType(); } } PRUint8 siblingDisplay = aSibling->GetStyleDisplay()->mDisplay; if ((NS_STYLE_DISPLAY_TABLE_COLUMN_GROUP == siblingDisplay) || (NS_STYLE_DISPLAY_TABLE_COLUMN == siblingDisplay) || (NS_STYLE_DISPLAY_TABLE_CAPTION == siblingDisplay) || (NS_STYLE_DISPLAY_TABLE_HEADER_GROUP == siblingDisplay) || (NS_STYLE_DISPLAY_TABLE_ROW_GROUP == siblingDisplay) || (NS_STYLE_DISPLAY_TABLE_FOOTER_GROUP == siblingDisplay) || nsGkAtoms::menuFrame == parentType) { // if we haven't already, construct a style context to find the display type of aContent if (UNSET_DISPLAY == aDisplay) { nsRefPtr styleContext; nsIFrame* styleParent; PRBool providerIsChild; if (NS_FAILED(aSibling-> GetParentStyleContextFrame(aSibling->PresContext(), &styleParent, &providerIsChild)) || !styleParent) { NS_NOTREACHED("Shouldn't happen"); return PR_FALSE; } styleContext = ResolveStyleContext(styleParent, aContent); if (!styleContext) return PR_FALSE; const nsStyleDisplay* display = styleContext->GetStyleDisplay(); aDisplay = display->mDisplay; } if (nsGkAtoms::menuFrame == parentType) { return (NS_STYLE_DISPLAY_POPUP == aDisplay) == (NS_STYLE_DISPLAY_POPUP == siblingDisplay); } switch (siblingDisplay) { case NS_STYLE_DISPLAY_TABLE_COLUMN_GROUP: return (NS_STYLE_DISPLAY_TABLE_COLUMN_GROUP == aDisplay); case NS_STYLE_DISPLAY_TABLE_COLUMN: return (NS_STYLE_DISPLAY_TABLE_COLUMN == aDisplay); case NS_STYLE_DISPLAY_TABLE_CAPTION: return (NS_STYLE_DISPLAY_TABLE_CAPTION == aDisplay); default: // all of the row group types return (NS_STYLE_DISPLAY_TABLE_HEADER_GROUP == aDisplay) || (NS_STYLE_DISPLAY_TABLE_ROW_GROUP == aDisplay) || (NS_STYLE_DISPLAY_TABLE_FOOTER_GROUP == aDisplay) || (NS_STYLE_DISPLAY_TABLE_CAPTION == aDisplay); } } else if (nsGkAtoms::fieldSetFrame == parentType || (nsGkAtoms::fieldSetFrame == grandparentType && nsGkAtoms::areaFrame == parentType)) { // Legends can be sibling of legends but not of other content in the fieldset nsIAtom* sibType = aSibling->GetType(); nsCOMPtr legendContent(do_QueryInterface(aContent)); if ((legendContent && (nsGkAtoms::legendFrame != sibType)) || (!legendContent && (nsGkAtoms::legendFrame == sibType))) return PR_FALSE; } return PR_TRUE; } nsIFrame* nsCSSFrameConstructor::FindFrameForContentSibling(nsIContent* aContent, nsIContent* aTargetContent, PRUint8& aTargetContentDisplay, PRBool aPrevSibling) { nsIFrame* sibling = mPresShell->GetPrimaryFrameFor(aContent); if (!sibling) { return nsnull; } // If the frame is out-of-flow, GPFF() will have returned the // out-of-flow frame; we want the placeholder. if (sibling->GetStateBits() & NS_FRAME_OUT_OF_FLOW) { nsIFrame* placeholderFrame; mPresShell->GetPlaceholderFrameFor(sibling, &placeholderFrame); NS_ASSERTION(placeholderFrame, "no placeholder for out-of-flow frame"); sibling = placeholderFrame; } // The frame we have now should never be a continuation NS_ASSERTION(!sibling->GetPrevContinuation(), "How did that happen?"); if (aPrevSibling) { // The frame may be a special frame (a split inline frame that // contains a block). Get the last part of that split. if (IsFrameSpecial(sibling)) { sibling = GetLastSpecialSibling(sibling); } // The frame may have a continuation. If so, we want the last // non-overflow-container continuation as our previous sibling. sibling = sibling->GetLastContinuation(); while (sibling->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER) { sibling = sibling->GetPrevInFlow(); NS_ASSERTION(sibling, "first-in-flow can't be overflow container"); } } if (aTargetContent && !IsValidSibling(sibling, aTargetContent, aTargetContentDisplay)) { sibling = nsnull; } return sibling; } /** * Find the ``rightmost'' frame for the content immediately preceding * aIndexInContainer, following continuations if necessary. */ nsIFrame* nsCSSFrameConstructor::FindPreviousSibling(nsIContent* aContainer, PRInt32 aIndexInContainer, nsIContent* aChild) { NS_ASSERTION(aContainer, "null argument"); ChildIterator first, iter; nsresult rv = ChildIterator::Init(aContainer, &first, &iter); NS_ENSURE_SUCCESS(rv, nsnull); iter.seek(aIndexInContainer); PRUint8 childDisplay = UNSET_DISPLAY; // Note: not all content objects are associated with a frame (e.g., if it's // `display: none') so keep looking until we find a previous frame while (iter-- != first) { nsIFrame* prevSibling = FindFrameForContentSibling(nsCOMPtr(*iter), aChild, childDisplay, PR_TRUE); if (prevSibling) { #ifdef DEBUG nsIFrame* containerFrame = nsnull; containerFrame = mPresShell->GetPrimaryFrameFor(aContainer); NS_ASSERTION(prevSibling != containerFrame, "Previous Sibling is the Container's frame"); #endif // Found a previous sibling, we're done! return prevSibling; } } return nsnull; } /** * Find the frame for the content node immediately following * aIndexInContainer. */ nsIFrame* nsCSSFrameConstructor::FindNextSibling(nsIContent* aContainer, PRInt32 aIndexInContainer, nsIContent* aChild) { ChildIterator iter, last; nsresult rv = ChildIterator::Init(aContainer, &iter, &last); NS_ENSURE_SUCCESS(rv, nsnull); iter.seek(aIndexInContainer); // Catch the case where someone tries to append if (iter == last) return nsnull; PRUint8 childDisplay = UNSET_DISPLAY; while (++iter != last) { nsIFrame* nextSibling = FindFrameForContentSibling(nsCOMPtr(*iter), aChild, childDisplay, PR_FALSE); if (nextSibling) { // We found a next sibling, we're done! return nextSibling; } } return nsnull; } inline PRBool ShouldIgnoreSelectChild(nsIContent* aContainer) { // Ignore options and optgroups inside a select (size > 1) nsIAtom *containerTag = aContainer->Tag(); if (containerTag == nsGkAtoms::optgroup || containerTag == nsGkAtoms::select) { nsIContent* selectContent = aContainer; while (containerTag != nsGkAtoms::select) { selectContent = selectContent->GetParent(); if (!selectContent) { break; } containerTag = selectContent->Tag(); } nsCOMPtr selectElement = do_QueryInterface(selectContent); if (selectElement) { nsAutoString selSize; aContainer->GetAttr(kNameSpaceID_None, nsGkAtoms::size, selSize); if (!selSize.IsEmpty()) { PRInt32 err; return (selSize.ToInteger(&err) > 1); } } } return PR_FALSE; } // For fieldsets, returns the area frame, if the child is not a legend. static nsIFrame* GetAdjustedParentFrame(nsIFrame* aParentFrame, nsIAtom* aParentFrameType, nsIContent* aParentContent, PRInt32 aChildIndex) { NS_PRECONDITION(nsGkAtoms::tableOuterFrame != aParentFrameType, "Shouldn't be happening!"); nsIContent *childContent = aParentContent->GetChildAt(aChildIndex); nsIFrame* newParent = nsnull; if (nsGkAtoms::fieldSetFrame == aParentFrameType) { // If the parent is a fieldSet, use the fieldSet's area frame as the // parent unless the new content is a legend. nsCOMPtr legendContent(do_QueryInterface(childContent)); if (!legendContent) { newParent = GetFieldSetAreaFrame(aParentFrame); } } return (newParent) ? newParent : aParentFrame; } static void InvalidateCanvasIfNeeded(nsIFrame* aFrame); static PRBool IsSpecialFramesetChild(nsIContent* aContent) { // IMPORTANT: This must match the conditions in nsHTMLFramesetFrame::Init. return aContent->IsNodeOfType(nsINode::eHTML) && (aContent->Tag() == nsGkAtoms::frameset || aContent->Tag() == nsGkAtoms::frame); } nsresult nsCSSFrameConstructor::ContentAppended(nsIContent* aContainer, PRInt32 aNewIndexInContainer) { AUTO_LAYOUT_PHASE_ENTRY_POINT(mPresShell->GetPresContext(), FrameC); NS_PRECONDITION(mUpdateCount != 0, "Should be in an update while creating frames"); #ifdef DEBUG if (gNoisyContentUpdates) { printf("nsCSSFrameConstructor::ContentAppended container=%p index=%d\n", static_cast(aContainer), aNewIndexInContainer); if (gReallyNoisyContentUpdates && aContainer) { aContainer->List(stdout, 0); } } #endif #ifdef MOZ_XUL if (aContainer) { PRInt32 namespaceID; nsIAtom* tag = mDocument->BindingManager()->ResolveTag(aContainer, &namespaceID); // Just ignore tree tags, anyway we don't create any frames for them. if (tag == nsGkAtoms::treechildren || tag == nsGkAtoms::treeitem || tag == nsGkAtoms::treerow || (namespaceID == kNameSpaceID_XUL && gUseXBLForms && ShouldIgnoreSelectChild(aContainer))) return NS_OK; } #endif // MOZ_XUL // Get the frame associated with the content nsIFrame* parentFrame = GetFrameFor(aContainer); if (! parentFrame) return NS_OK; // See if we have an XBL insertion point. If so, then that's our // real parent frame; if not, then the frame hasn't been built yet // and we just bail. // nsIFrame* insertionPoint; PRBool multiple = PR_FALSE; GetInsertionPoint(parentFrame, nsnull, &insertionPoint, &multiple); if (! insertionPoint) return NS_OK; // Don't build the frames. PRBool hasInsertion = PR_FALSE; if (!multiple) { nsIDocument* document = nsnull; nsIContent *firstAppendedChild = aContainer->GetChildAt(aNewIndexInContainer); if (firstAppendedChild) { document = firstAppendedChild->GetDocument(); } if (document && document->BindingManager()->GetInsertionParent(firstAppendedChild)) { hasInsertion = PR_TRUE; } } if (multiple || hasInsertion) { // We have an insertion point. There are some additional tests we need to do // in order to ensure that an append is a safe operation. PRUint32 childCount = 0; if (!multiple) { // We may need to make multiple ContentInserted calls instead. A // reasonable heuristic to employ (in order to maintain good performance) // is to find out if the insertion point's content node contains any // explicit children. If it does not, then it is highly likely that // an append is occurring. (Note it is not definite, and there are insane // cases we will not deal with by employing this heuristic, but it beats // always falling back to multiple ContentInserted calls). // // In the multiple insertion point case, we know we're going to need to do // multiple ContentInserted calls anyway. childCount = insertionPoint->GetContent()->GetChildCount(); } if (multiple || childCount > 0) { // Now comes the fun part. For each appended child, we must obtain its // insertion point and find its exact position within that insertion point. // We then make a ContentInserted call with the correct computed index. nsIContent* insertionContent = insertionPoint->GetContent(); PRUint32 containerCount = aContainer->GetChildCount(); for (PRUint32 i = aNewIndexInContainer; i < containerCount; i++) { nsIContent *child = aContainer->GetChildAt(i); if (multiple) { // Filters are in effect, so the insertion point needs to be refetched for // each child. GetInsertionPoint(parentFrame, child, &insertionPoint); if (!insertionPoint) { // This content node doesn't have an insertion point, so we just // skip over it continue; } insertionContent = insertionPoint->GetContent(); } // Construct an iterator to locate this child at its correct index. ChildIterator iter, last; for (ChildIterator::Init(insertionContent, &iter, &last); iter != last; ++iter) { LAYOUT_PHASE_TEMP_EXIT(); nsIContent* item = nsCOMPtr(*iter); if (item == child) // Call ContentInserted with this index. ContentInserted(aContainer, child, iter.index(), mTempFrameTreeState); LAYOUT_PHASE_TEMP_REENTER(); } } return NS_OK; } } parentFrame = insertionPoint; if (parentFrame->GetType() == nsGkAtoms::frameSetFrame) { // Check whether we have any kids we care about. PRUint32 count = aContainer->GetChildCount(); for (PRUint32 i = aNewIndexInContainer; i < count; ++i) { if (IsSpecialFramesetChild(aContainer->GetChildAt(i))) { // Just reframe the parent, since framesets are weird like that. return RecreateFramesForContent(parentFrame->GetContent()); } } } if (parentFrame->IsLeaf()) { // Nothing to do here; we shouldn't be constructing kids of leaves return NS_OK; } #ifdef MOZ_MATHML if (parentFrame->IsFrameOfType(nsIFrame::eMathML)) return RecreateFramesForContent(parentFrame->GetContent()); #endif // If the frame we are manipulating is a ``special'' frame (that is, one // that's been created as a result of a block-in-inline situation) then we // need to append to the last special sibling, not to the frame itself. if (IsFrameSpecial(parentFrame)) { #ifdef DEBUG if (gNoisyContentUpdates) { printf("nsCSSFrameConstructor::ContentAppended: parentFrame="); nsFrame::ListTag(stdout, parentFrame); printf(" is special\n"); } #endif // Since we're appending, we'll walk to the last anonymous frame // that was created for the broken inline frame. parentFrame = GetLastSpecialSibling(parentFrame); } // Get the parent frame's last continuation parentFrame = parentFrame->GetLastContinuation(); nsIAtom* frameType = parentFrame->GetType(); // Deal with fieldsets parentFrame = ::GetAdjustedParentFrame(parentFrame, frameType, aContainer, aNewIndexInContainer); // Deal with possible :after generated content on the parent nsIFrame* parentAfterFrame; parentFrame = ::AdjustAppendParentForAfterContent(mPresShell->GetPresContext(), aContainer, parentFrame, &parentAfterFrame); // Create some new frames PRUint32 count; nsFrameItems frameItems; nsFrameConstructorState state(mPresShell, mFixedContainingBlock, GetAbsoluteContainingBlock(parentFrame), GetFloatContainingBlock(parentFrame)); // See if the containing block has :first-letter style applied. PRBool haveFirstLetterStyle = PR_FALSE, haveFirstLineStyle = PR_FALSE; nsIFrame* containingBlock = state.mFloatedItems.containingBlock; if (containingBlock) { haveFirstLetterStyle = HasFirstLetterStyle(containingBlock); haveFirstLineStyle = ShouldHaveFirstLineStyle(containingBlock->GetContent(), containingBlock->GetStyleContext()); } if (haveFirstLetterStyle) { // Before we get going, remove the current letter frames RemoveLetterFrames(state.mPresContext, state.mPresShell, state.mFrameManager, containingBlock); } // if the container is a table and a caption was appended, it needs to be put in // the outer table frame's additional child list. nsFrameItems captionItems; // The last frame that we added to the list. nsIFrame* oldNewFrame = nsnull; PRUint32 i; count = aContainer->GetChildCount(); for (i = aNewIndexInContainer; i < count; i++) { nsIFrame* newFrame = nsnull; nsIContent *childContent = aContainer->GetChildAt(i); ConstructFrame(state, childContent, parentFrame, frameItems); newFrame = frameItems.lastChild; if (newFrame && newFrame != oldNewFrame) { InvalidateCanvasIfNeeded(newFrame); oldNewFrame = newFrame; } } if (nsGkAtoms::tableFrame == frameType) { // Pull out the captions. Note that we don't want to do that as we go, // because processing a single caption can add a whole bunch of things to // the frame items due to pseudoframe processing. So we'd have to pull // captions from a list anyway; might as well do that here. PullOutCaptionFrames(frameItems, captionItems); } // process the current pseudo frame state if (!state.mPseudoFrames.IsEmpty()) { ProcessPseudoFrames(state, frameItems); } if (haveFirstLineStyle && parentFrame == containingBlock) { // It's possible that some of the new frames go into a // first-line frame. Look at them and see... AppendFirstLineFrames(state, containingBlock->GetContent(), containingBlock, frameItems); } nsresult result = NS_OK; // Notify the parent frame passing it the list of new frames if (NS_SUCCEEDED(result) && (frameItems.childList || captionItems.childList)) { // Perform special check for diddling around with the frames in // a special inline frame. // We can't have a block ::after inside an inline, so it's safe to ignore // the fact that we're not really appending if there's ::after content. // Indeed, if we're inserting before the ::after content that means the // ::after content is not the last child of the block in the {ib} split, // which is the only case in which we care whether we're appending. if (WipeContainingBlock(state, containingBlock, parentFrame, frameItems, PR_TRUE, nsnull)) { return NS_OK; } // Append the flowed frames to the principal child list, tables need special treatment if (nsGkAtoms::tableFrame == frameType) { if (captionItems.childList) { // append the caption to the outer table nsIFrame* outerTable = parentFrame->GetParent(); if (outerTable) { state.mFrameManager->AppendFrames(outerTable, nsGkAtoms::captionList, captionItems.childList); } } if (frameItems.childList) { // append children of the inner table AppendFrames(state, aContainer, parentFrame, frameItems, parentAfterFrame); } } else { AppendFrames(state, aContainer, parentFrame, frameItems, parentAfterFrame); } } // Recover first-letter frames if (haveFirstLetterStyle) { RecoverLetterFrames(state, containingBlock); } #ifdef DEBUG if (gReallyNoisyContentUpdates) { nsIFrameDebug* fdbg = nsnull; CallQueryInterface(parentFrame, &fdbg); if (fdbg) { printf("nsCSSFrameConstructor::ContentAppended: resulting frame model:\n"); fdbg->List(stdout, 0); } } #endif return NS_OK; } #ifdef MOZ_XUL enum content_operation { CONTENT_INSERTED, CONTENT_REMOVED }; // Helper function to lookup the listbox body frame and send a notification // for insertion or removal of content static PRBool NotifyListBoxBody(nsPresContext* aPresContext, nsIContent* aContainer, nsIContent* aChild, PRInt32 aIndexInContainer, nsIDocument* aDocument, nsIFrame* aChildFrame, PRBool aUseXBLForms, content_operation aOperation) { if (!aContainer) return PR_FALSE; if (aContainer->IsNodeOfType(nsINode::eXUL) && aChild->IsNodeOfType(nsINode::eXUL) && aContainer->Tag() == nsGkAtoms::listbox && aChild->Tag() == nsGkAtoms::listitem) { nsCOMPtr xulElement = do_QueryInterface(aContainer); nsCOMPtr boxObject; xulElement->GetBoxObject(getter_AddRefs(boxObject)); nsCOMPtr listBoxObject = do_QueryInterface(boxObject); if (listBoxObject) { nsIListBoxObject* listboxBody = listBoxObject->GetListBoxBody(PR_FALSE); if (listboxBody) { nsListBoxBodyFrame *listBoxBodyFrame = static_cast(listboxBody); if (aOperation == CONTENT_REMOVED) { // Except if we have an aChildFrame and its parent is not the right // thing, then we don't do this. Pseudo frames are so much fun.... if (!aChildFrame || aChildFrame->GetParent() == listBoxBodyFrame) { listBoxBodyFrame->OnContentRemoved(aPresContext, aChildFrame, aIndexInContainer); return PR_TRUE; } } else { listBoxBodyFrame->OnContentInserted(aPresContext, aChild); return PR_TRUE; } } } } PRInt32 namespaceID; nsIAtom* tag = aDocument->BindingManager()->ResolveTag(aContainer, &namespaceID); // XBL form control cruft... should that really be testing that the // namespace is XUL? Seems odd... if (aUseXBLForms && aContainer->GetParent() && namespaceID == kNameSpaceID_XUL && ShouldIgnoreSelectChild(aContainer)) return PR_TRUE; return PR_FALSE; } #endif // MOZ_XUL nsresult nsCSSFrameConstructor::ContentInserted(nsIContent* aContainer, nsIContent* aChild, PRInt32 aIndexInContainer, nsILayoutHistoryState* aFrameState) { AUTO_LAYOUT_PHASE_ENTRY_POINT(mPresShell->GetPresContext(), FrameC); NS_PRECONDITION(mUpdateCount != 0, "Should be in an update while creating frames"); // XXXldb Do we need to re-resolve style to handle the CSS2 + combinator and // the :empty pseudo-class? #ifdef DEBUG if (gNoisyContentUpdates) { printf("nsCSSFrameConstructor::ContentInserted container=%p child=%p index=%d\n", static_cast(aContainer), static_cast(aChild), aIndexInContainer); if (gReallyNoisyContentUpdates) { (aContainer ? aContainer : aChild)->List(stdout, 0); } } #endif nsresult rv = NS_OK; #ifdef MOZ_XUL if (NotifyListBoxBody(mPresShell->GetPresContext(), aContainer, aChild, aIndexInContainer, mDocument, nsnull, gUseXBLForms, CONTENT_INSERTED)) return NS_OK; #endif // MOZ_XUL // If we have a null parent, then this must be the document element // being inserted if (! aContainer) { nsIContent *docElement = mDocument->GetRootContent(); if (aChild == docElement) { NS_PRECONDITION(nsnull == mInitialContainingBlock, "initial containing block already created"); if (!mDocElementContainingBlock) return NS_OK; // We get into this situation when an XBL binding is asynchronously // applied to the root tag (e.g., in XUL). It's ok. We can // just bail here because the root will really be built later during // InitialReflow. // Create frames for the document element and its child elements nsIFrame* docElementFrame; nsFrameConstructorState state(mPresShell, mFixedContainingBlock, nsnull, nsnull, aFrameState); rv = ConstructDocElementFrame(state, docElement, mDocElementContainingBlock, &docElementFrame); if (NS_SUCCEEDED(rv) && docElementFrame) { if (mDocElementContainingBlock->GetStateBits() & NS_FRAME_FIRST_REFLOW) { // Set the initial child list for the parent and wait on the initial // reflow. mDocElementContainingBlock->SetInitialChildList(nsnull, docElementFrame); } else { // Whoops, we've already received our initial reflow! Insert the doc. // element as a child so it reflows (note that containing block is // empty, so we can simply append). NS_ASSERTION(mDocElementContainingBlock->GetFirstChild(nsnull) == nsnull, "Unexpected child of document element containing block"); mDocElementContainingBlock->AppendFrames(nsnull, docElementFrame); } InvalidateCanvasIfNeeded(docElementFrame); #ifdef DEBUG if (gReallyNoisyContentUpdates) { nsIFrameDebug* fdbg = nsnull; CallQueryInterface(docElementFrame, &fdbg); if (fdbg) { printf("nsCSSFrameConstructor::ContentInserted: resulting frame model:\n"); fdbg->List(stdout, 0); } } #endif } } // otherwise this is not a child of the root element, and we // won't let it have a frame. return NS_OK; } // Otherwise, we've got parent content. Find its frame. nsIFrame* parentFrame = GetFrameFor(aContainer); if (! parentFrame) return NS_OK; // XXXwaterson will this break selects? (See ``Here // we have been notified...'' below.) // See if we have an XBL insertion point. If so, then that's our // real parent frame; if not, then the frame hasn't been built yet // and we just bail. nsIFrame* insertionPoint; GetInsertionPoint(parentFrame, aChild, &insertionPoint); if (! insertionPoint) return NS_OK; // Don't build the frames. parentFrame = insertionPoint; // Find the frame that precedes the insertion point. Walk backwards // from the parent frame to get the parent content, because if an // XBL insertion point is involved, we'll need to use _that_ to find // the preceding frame. nsIContent* container = parentFrame->GetContent(); // XXX if the insertionPoint was different from the original // parentFrame, then aIndexInContainer is most likely completely // wrong. What we need to do here is remember the original index, // then as we insert, search the child list where we're about to put // the new frame to make sure that it appears after any siblings // with a lower index, and before any siblings with a higher // index. Same with FindNextSibling(), below. nsIFrame* prevSibling = (aIndexInContainer >= 0) ? FindPreviousSibling(container, aIndexInContainer, aChild) : FindPreviousAnonymousSibling(aContainer, aChild); PRBool isAppend = PR_FALSE; nsIFrame* appendAfterFrame; // This is only looked at when isAppend is true nsIFrame* nextSibling = nsnull; // If there is no previous sibling, then find the frame that follows if (! prevSibling) { nextSibling = (aIndexInContainer >= 0) ? FindNextSibling(container, aIndexInContainer, aChild) : FindNextAnonymousSibling(aContainer, aChild); } // Now, find the geometric parent so that we can handle // continuations properly. Use the prev sibling if we have it; // otherwise use the next sibling. if (prevSibling) { parentFrame = prevSibling->GetParent()->GetContentInsertionFrame(); } else if (nextSibling) { parentFrame = nextSibling->GetParent()->GetContentInsertionFrame(); } else { // No previous or next sibling, so treat this like an appended frame. isAppend = PR_TRUE; // Deal with fieldsets parentFrame = ::GetAdjustedParentFrame(parentFrame, parentFrame->GetType(), aContainer, aIndexInContainer); parentFrame = ::AdjustAppendParentForAfterContent(mPresShell->GetPresContext(), aContainer, parentFrame, &appendAfterFrame); } if (parentFrame->GetType() == nsGkAtoms::frameSetFrame && IsSpecialFramesetChild(aChild)) { // Just reframe the parent, since framesets are weird like that. return RecreateFramesForContent(parentFrame->GetContent()); } // Don't construct kids of leaves if (parentFrame->IsLeaf()) { return NS_OK; } #ifdef MOZ_MATHML if (parentFrame->IsFrameOfType(nsIFrame::eMathML)) return RecreateFramesForContent(parentFrame->GetContent()); #endif nsFrameConstructorState state(mPresShell, mFixedContainingBlock, GetAbsoluteContainingBlock(parentFrame), GetFloatContainingBlock(parentFrame), aFrameState); // Recover state for the containing block - we need to know if // it has :first-letter or :first-line style applied to it. The // reason we care is that the internal structure in these cases // is not the normal structure and requires custom updating // logic. nsIFrame* containingBlock = state.mFloatedItems.containingBlock; PRBool haveFirstLetterStyle = PR_FALSE; PRBool haveFirstLineStyle = PR_FALSE; // In order to shave off some cycles, we only dig up the // containing block haveFirst* flags if the parent frame where // the insertion/append is occurring is an inline or block // container. For other types of containers this isn't relevant. const nsStyleDisplay* parentDisplay = parentFrame->GetStyleDisplay(); // Examine the parentFrame where the insertion is taking // place. If it's a certain kind of container then some special // processing is done. if ((NS_STYLE_DISPLAY_BLOCK == parentDisplay->mDisplay) || (NS_STYLE_DISPLAY_LIST_ITEM == parentDisplay->mDisplay) || (NS_STYLE_DISPLAY_INLINE == parentDisplay->mDisplay) || (NS_STYLE_DISPLAY_INLINE_BLOCK == parentDisplay->mDisplay)) { // Recover the special style flags for the containing block if (containingBlock) { haveFirstLetterStyle = HasFirstLetterStyle(containingBlock); haveFirstLineStyle = ShouldHaveFirstLineStyle(containingBlock->GetContent(), containingBlock->GetStyleContext()); } if (haveFirstLetterStyle) { // Get the correct parentFrame and prevSibling - if a // letter-frame is present, use its parent. if (parentFrame->GetType() == nsGkAtoms::letterFrame) { parentFrame = parentFrame->GetParent(); container = parentFrame->GetContent(); } // Remove the old letter frames before doing the insertion RemoveLetterFrames(state.mPresContext, mPresShell, state.mFrameManager, state.mFloatedItems.containingBlock); // Removing the letterframes messes around with the frame tree, removing // and creating frames. We need to reget our prevsibling. // See XXX comment the first time we do this in this method.... prevSibling = (aIndexInContainer >= 0) ? FindPreviousSibling(container, aIndexInContainer, aChild) : FindPreviousAnonymousSibling(aContainer, aChild); // If there is no previous sibling, then find the frame that follows if (! prevSibling) { nextSibling = (aIndexInContainer >= 0) ? FindNextSibling(container, aIndexInContainer, aChild) : FindNextAnonymousSibling(aContainer, aChild); } } } if (!prevSibling) { // We're inserting the new frame as the first child. See if the // parent has a :before pseudo-element nsIFrame* firstChild = parentFrame->GetFirstChild(nsnull); if (firstChild && nsLayoutUtils::IsGeneratedContentFor(aContainer, firstChild, nsCSSPseudoElements::before)) { // Insert the new frames after the last continuation of the :before prevSibling = firstChild->GetLastContinuation(); parentFrame = prevSibling->GetParent(); // We perhaps could leave this true and take the AppendFrames path // below, but we'd have to update appendAfterFrame and it seems safer // to force all insert-after-:before cases to take these to take the // InsertFrames path isAppend = PR_FALSE; } } // if the container is a table and a caption will be appended, it needs to be // put in the outer table frame's additional child list. nsFrameItems frameItems, captionItems; ConstructFrame(state, aChild, parentFrame, frameItems); if (frameItems.childList) { InvalidateCanvasIfNeeded(frameItems.childList); if (nsGkAtoms::tableCaptionFrame == frameItems.childList->GetType()) { NS_ASSERTION(frameItems.childList == frameItems.lastChild , "adding a non caption frame to the caption childlist?"); captionItems.AddChild(frameItems.childList); frameItems = nsFrameItems(); } } // process the current pseudo frame state if (!state.mPseudoFrames.IsEmpty()) ProcessPseudoFrames(state, frameItems); // If the parent of our current prevSibling is different from the frame we'll // actually use as the parent, then the calculated insertion point is now // invalid and as it is unknown where to insert correctly we append instead // (bug 341858). if (prevSibling && frameItems.childList && frameItems.childList->GetParent() != prevSibling->GetParent()) { prevSibling = nsnull; isAppend = PR_TRUE; parentFrame = ::AdjustAppendParentForAfterContent(mPresShell->GetPresContext(), aContainer, frameItems.childList->GetParent(), &appendAfterFrame); } // Perform special check for diddling around with the frames in // a special inline frame. // We can't have a block ::after inside an inline, so it's safe to ignore // the fact that we're not really appending if there's ::after content. // Indeed, if we're inserting before the ::after content that means the // ::after content is not the last child of the block in the {ib} split, // which is the only case in which we care whether we're appending. if (WipeContainingBlock(state, containingBlock, parentFrame, frameItems, isAppend, prevSibling)) return NS_OK; if (haveFirstLineStyle && parentFrame == containingBlock) { // It's possible that the new frame goes into a first-line // frame. Look at it and see... if (isAppend) { // Use append logic when appending AppendFirstLineFrames(state, containingBlock->GetContent(), containingBlock, frameItems); } else { // Use more complicated insert logic when inserting InsertFirstLineFrames(state, aContainer, containingBlock, &parentFrame, prevSibling, frameItems); } } nsIFrame* const newFrame = frameItems.childList; if (NS_SUCCEEDED(rv) && newFrame) { NS_ASSERTION(!captionItems.childList, "leaking caption frames"); // Notify the parent frame if (isAppend) { AppendFrames(state, aContainer, parentFrame, frameItems, appendAfterFrame); } else { state.mFrameManager->InsertFrames(parentFrame, nsnull, prevSibling, newFrame); } } else { // we might have a caption treat it here nsIFrame* newCaptionFrame = captionItems.childList; if (NS_SUCCEEDED(rv) && newCaptionFrame) { nsIFrame* outerTableFrame; if (GetCaptionAdjustedParent(parentFrame, newCaptionFrame, &outerTableFrame)) { // If the parent of our current prevSibling is different from the frame // we'll actually use as the parent, then the calculated insertion // point is now invalid (bug 341382). if (prevSibling && prevSibling->GetParent() != outerTableFrame) { prevSibling = nsnull; } // If the parent is not a outer table frame we will try to add frames // to a named child list that the parent does not honour and the frames // will get lost NS_ASSERTION(nsGkAtoms::tableOuterFrame == outerTableFrame->GetType(), "Pseudo frame construction failure, " "a caption can be only a child of a outer table frame"); if (isAppend) { state.mFrameManager->AppendFrames(outerTableFrame, nsGkAtoms::captionList, newCaptionFrame); } else { state.mFrameManager->InsertFrames(outerTableFrame, nsGkAtoms::captionList, prevSibling, newCaptionFrame); } } } } if (haveFirstLetterStyle) { // Recover the letter frames for the containing block when // it has first-letter style. RecoverLetterFrames(state, state.mFloatedItems.containingBlock); } #ifdef DEBUG if (gReallyNoisyContentUpdates && parentFrame) { nsIFrameDebug* fdbg = nsnull; CallQueryInterface(parentFrame, &fdbg); if (fdbg) { printf("nsCSSFrameConstructor::ContentInserted: resulting frame model:\n"); fdbg->List(stdout, 0); } } #endif return NS_OK; } nsresult nsCSSFrameConstructor::ReinsertContent(nsIContent* aContainer, nsIContent* aChild) { PRInt32 ix = aContainer->IndexOf(aChild); // XXX For now, do a brute force remove and insert. // XXXbz this probably doesn't work so well with anonymous content // XXXbz doesn't this need to do the state-saving stuff that // RecreateFramesForContent does? PRBool didReconstruct; nsresult res = ContentRemoved(aContainer, aChild, ix, &didReconstruct); if (NS_SUCCEEDED(res) && !didReconstruct) { // If ContentRemoved just reconstructed everything, there is no need to // reinsert the content here res = ContentInserted(aContainer, aChild, ix, nsnull); } return res; } /** * Called when a frame subtree is about to be deleted. Two important * things happen: * * 1. For each frame in the subtree, we remove the mapping from the * content object to its frame * * 2. For child frames that have been moved out of the flow, we enqueue * the out-of-flow frame for deletion *if* the out-of-flow frame's * geometric parent is not in |aRemovedFrame|'s hierarchy (e.g., an * absolutely positioned element that has been promoted to be a direct * descendant of an area frame). * * Note: this function should only be called by DeletingFrameSubtree() * * @param aRemovedFrame this is the frame that was removed from the * content model. As we recurse we need to remember this so we * can check if out-of-flow frames are a descendant of the frame * being removed * @param aFrame the local subtree that is being deleted. This is initially * the same as aRemovedFrame, but as we recurse down the tree * this changes */ static nsresult DoDeletingFrameSubtree(nsFrameManager* aFrameManager, nsVoidArray& aDestroyQueue, nsIFrame* aRemovedFrame, nsIFrame* aFrame) { // Remove the mapping from the content object to its frame. nsIContent* content = aFrame->GetContent(); if (content) { aFrameManager->RemoveAsPrimaryFrame(content, aFrame); aFrameManager->ClearAllUndisplayedContentIn(content); } nsIAtom* childListName = nsnull; PRInt32 childListIndex = 0; do { // Walk aFrame's normal flow child frames looking for placeholder frames. nsIFrame* childFrame = aFrame->GetFirstChild(childListName); for (; childFrame; childFrame = childFrame->GetNextSibling()) { if (NS_LIKELY(nsGkAtoms::placeholderFrame != childFrame->GetType())) { DoDeletingFrameSubtree(aFrameManager, aDestroyQueue, aRemovedFrame, childFrame); } else { nsIFrame* outOfFlowFrame = nsPlaceholderFrame::GetRealFrameForPlaceholder(childFrame); // Remove the mapping from the out-of-flow frame to its placeholder. aFrameManager->UnregisterPlaceholderFrame((nsPlaceholderFrame*)childFrame); // Don't SetOutOfFlowFrame(nsnull) here because the float cache depends // on it when the float is removed later on, see bug 348688 comment 6. // Queue the out-of-flow frame to be destroyed only if aRemovedFrame is _not_ // one of its ancestor frames or if it is a popup frame. // If aRemovedFrame is an ancestor of the out-of-flow frame, then // the out-of-flow frame will be destroyed by aRemovedFrame. if (outOfFlowFrame->GetStyleDisplay()->mDisplay == NS_STYLE_DISPLAY_POPUP || !nsLayoutUtils::IsProperAncestorFrame(aRemovedFrame, outOfFlowFrame)) { NS_ASSERTION(aDestroyQueue.IndexOf(outOfFlowFrame) == kNotFound, "out-of-flow is already in the destroy queue"); aDestroyQueue.AppendElement(outOfFlowFrame); // Recurse into the out-of-flow, it is now the aRemovedFrame. DoDeletingFrameSubtree(aFrameManager, aDestroyQueue, outOfFlowFrame, outOfFlowFrame); } else { // Also recurse into the out-of-flow when it's a descendant of aRemovedFrame // since we don't walk those lists, see |childListName| increment below. DoDeletingFrameSubtree(aFrameManager, aDestroyQueue, aRemovedFrame, outOfFlowFrame); } } } // Move to next child list but skip lists with frames we should have // a placeholder for. do { childListName = aFrame->GetAdditionalChildListName(childListIndex++); } while (IsOutOfFlowList(childListName)); } while (childListName); return NS_OK; } /** * Called when a frame is about to be deleted. Calls DoDeletingFrameSubtree() * for aFrame and each of its continuing frames */ static nsresult DeletingFrameSubtree(nsFrameManager* aFrameManager, nsIFrame* aFrame) { NS_ENSURE_TRUE(aFrame, NS_OK); // XXXldb Remove this sometime in the future. // If there's no frame manager it's probably because the pres shell is // being destroyed. if (NS_UNLIKELY(!aFrameManager)) { return NS_OK; } nsAutoVoidArray destroyQueue; // If it's a "special" block-in-inline frame, then we can't really deal. // That really shouldn't be happening. NS_ASSERTION(!IsFrameSpecial(aFrame), "DeletingFrameSubtree on a special frame. Prepare to crash."); do { DoDeletingFrameSubtree(aFrameManager, destroyQueue, aFrame, aFrame); // If it's split, then get the continuing frame. Note that we only do // this for the top-most frame being deleted. Don't do it if we're // recursing over a subtree, because those continuing frames should be // found as part of the walk over the top-most frame's continuing frames. // Walking them again will make this an N^2/2 algorithm. aFrame = aFrame->GetNextContinuation(); } while (aFrame); // Now destroy any out-of-flow frames that have been enqueued for // destruction. for (PRInt32 i = destroyQueue.Count() - 1; i >= 0; --i) { nsIFrame* outOfFlowFrame = static_cast(destroyQueue[i]); // Ask the out-of-flow's parent to delete the out-of-flow // frame from the right list. aFrameManager->RemoveFrame(outOfFlowFrame->GetParent(), GetChildListNameFor(outOfFlowFrame), outOfFlowFrame); } return NS_OK; } nsresult nsCSSFrameConstructor::RemoveMappingsForFrameSubtree(nsIFrame* aRemovedFrame) { if (NS_UNLIKELY(mIsDestroyingFrameTree)) { // The frame tree might not be in a consistent state after // WillDestroyFrameTree() has been called. Most likely we're destroying // the pres shell which means the frame manager takes care of clearing all // mappings so there is no need to walk the frame tree here, bug 372576. return NS_OK; } // Save the frame tree's state before deleting it CaptureStateFor(aRemovedFrame, mTempFrameTreeState); return ::DeletingFrameSubtree(mPresShell->FrameManager(), aRemovedFrame); } static void UnregisterPlaceholderChain(nsFrameManager* frameManager, nsPlaceholderFrame* placeholderFrame) { // Remove the mapping from the frame to its placeholder nsPlaceholderFrame* curFrame = placeholderFrame; do { frameManager->UnregisterPlaceholderFrame(curFrame); curFrame->SetOutOfFlowFrame(nsnull); curFrame = static_cast(curFrame->GetNextContinuation()); } while (curFrame); } nsresult nsCSSFrameConstructor::ContentRemoved(nsIContent* aContainer, nsIContent* aChild, PRInt32 aIndexInContainer, PRBool* aDidReconstruct) { AUTO_LAYOUT_PHASE_ENTRY_POINT(mPresShell->GetPresContext(), FrameC); NS_PRECONDITION(mUpdateCount != 0, "Should be in an update while destroying frames"); *aDidReconstruct = PR_FALSE; // XXXldb Do we need to re-resolve style to handle the CSS2 + combinator and // the :empty pseudo-class? #ifdef DEBUG if (gNoisyContentUpdates) { printf("nsCSSFrameConstructor::ContentRemoved container=%p child=%p index=%d\n", static_cast(aContainer), static_cast(aChild), aIndexInContainer); if (gReallyNoisyContentUpdates) { aContainer->List(stdout, 0); } } #endif nsFrameManager *frameManager = mPresShell->FrameManager(); nsPresContext *presContext = mPresShell->GetPresContext(); nsresult rv = NS_OK; // Find the child frame that maps the content nsIFrame* childFrame = mPresShell->FrameManager()->GetPrimaryFrameFor(aChild, aIndexInContainer); if (! childFrame) { frameManager->ClearUndisplayedContentIn(aChild, aContainer); } #ifdef MOZ_XUL if (NotifyListBoxBody(presContext, aContainer, aChild, aIndexInContainer, mDocument, childFrame, gUseXBLForms, CONTENT_REMOVED)) return NS_OK; #endif // MOZ_XUL if (childFrame) { InvalidateCanvasIfNeeded(childFrame); // If the frame we are manipulating is a special frame then do // something different instead of just inserting newly created // frames. // NOTE: if we are in ReinsertContent, // then do not reframe as we are already doing just that! if (MaybeRecreateContainerForIBSplitterFrame(childFrame, &rv)) { *aDidReconstruct = PR_TRUE; return rv; } // Get the childFrame's parent frame nsIFrame* parentFrame = childFrame->GetParent(); nsIAtom* parentType = parentFrame->GetType(); if (parentType == nsGkAtoms::frameSetFrame && IsSpecialFramesetChild(aChild)) { // Just reframe the parent, since framesets are weird like that. *aDidReconstruct = PR_TRUE; return RecreateFramesForContent(parentFrame->GetContent()); } #ifdef MOZ_MATHML // If we're a child of MathML, then we should reframe the MathML content. // If we're non-MathML, then we would be wrapped in a block so we need to // check our grandparent in that case. nsIFrame* possibleMathMLAncestor = parentType == nsGkAtoms::blockFrame ? parentFrame->GetParent() : parentFrame; if (possibleMathMLAncestor->IsFrameOfType(nsIFrame::eMathML)) { *aDidReconstruct = PR_TRUE; return RecreateFramesForContent(possibleMathMLAncestor->GetContent()); } #endif // Undo XUL wrapping if it's no longer needed. // (If we're in the XUL block-wrapping situation, parentFrame is the // wrapper frame.) nsIFrame* grandparentFrame = parentFrame->GetParent(); if (grandparentFrame && grandparentFrame->IsBoxFrame() && (grandparentFrame->GetStateBits() & NS_STATE_BOX_WRAPS_KIDS_IN_BLOCK) && // check if this frame is the only one needing wrapping aChild == AnyKidsNeedBlockParent(parentFrame->GetFirstChild(nsnull)) && !AnyKidsNeedBlockParent(childFrame->GetNextSibling())) { *aDidReconstruct = PR_TRUE; return RecreateFramesForContent(grandparentFrame->GetContent()); } // Examine the containing-block for the removed content and see if // :first-letter style applies. nsIFrame* containingBlock = GetFloatContainingBlock(parentFrame); PRBool haveFLS = containingBlock && HasFirstLetterStyle(containingBlock); if (haveFLS) { // Trap out to special routine that handles adjusting a blocks // frame tree when first-letter style is present. #ifdef NOISY_FIRST_LETTER printf("ContentRemoved: containingBlock="); nsFrame::ListTag(stdout, containingBlock); printf(" parentFrame="); nsFrame::ListTag(stdout, parentFrame); printf(" childFrame="); nsFrame::ListTag(stdout, childFrame); printf("\n"); #endif // First update the containing blocks structure by removing the // existing letter frames. This makes the subsequent logic // simpler. RemoveLetterFrames(presContext, mPresShell, frameManager, containingBlock); // Recover childFrame and parentFrame childFrame = mPresShell->GetPrimaryFrameFor(aChild); if (!childFrame) { frameManager->ClearUndisplayedContentIn(aChild, aContainer); return NS_OK; } parentFrame = childFrame->GetParent(); #ifdef NOISY_FIRST_LETTER printf(" ==> revised parentFrame="); nsFrame::ListTag(stdout, parentFrame); printf(" childFrame="); nsFrame::ListTag(stdout, childFrame); printf("\n"); #endif } #ifdef DEBUG if (gReallyNoisyContentUpdates) { printf("nsCSSFrameConstructor::ContentRemoved: childFrame="); nsFrame::ListTag(stdout, childFrame); printf("\n"); nsIFrameDebug* fdbg = nsnull; CallQueryInterface(parentFrame, &fdbg); if (fdbg) fdbg->List(stdout, 0); } #endif // Walk the frame subtree deleting any out-of-flow frames, and // remove the mapping from content objects to frames ::DeletingFrameSubtree(frameManager, childFrame); // See if the child frame is an out-of-flow if (childFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW) { nsPlaceholderFrame* placeholderFrame = frameManager->GetPlaceholderFrameFor(childFrame); NS_ASSERTION(placeholderFrame, "No placeholder for out-of-flow?"); UnregisterPlaceholderChain(frameManager, placeholderFrame); // Now we remove the out-of-flow frame // XXX has to be done first for now: for floats, the block's line list // contains an array of pointers to the placeholder - we have to // remove the float first (which gets rid of the lines // reference to the placeholder and float) and then remove the // placeholder rv = frameManager->RemoveFrame(parentFrame, GetChildListNameFor(childFrame), childFrame); // Remove the placeholder frame first (XXX second for now) (so // that it doesn't retain a dangling pointer to memory) nsIFrame* placeholderParent = placeholderFrame->GetParent(); ::DeletingFrameSubtree(frameManager, placeholderFrame); rv |= frameManager->RemoveFrame(placeholderParent, nsnull, placeholderFrame); } else { // Notify the parent frame that it should delete the frame // check for a table caption which goes on an additional child list with a different parent nsIFrame* outerTableFrame; if (GetCaptionAdjustedParent(parentFrame, childFrame, &outerTableFrame)) { rv = frameManager->RemoveFrame(outerTableFrame, nsGkAtoms::captionList, childFrame); } else { rv = frameManager->RemoveFrame(parentFrame, nsnull, childFrame); } } if (mInitialContainingBlock == childFrame) { mInitialContainingBlock = nsnull; mInitialContainingBlockIsAbsPosContainer = PR_FALSE; } if (haveFLS && mInitialContainingBlock) { NS_ASSERTION(containingBlock == GetFloatContainingBlock(parentFrame), "What happened here?"); nsFrameConstructorState state(mPresShell, mFixedContainingBlock, GetAbsoluteContainingBlock(parentFrame), containingBlock); RecoverLetterFrames(state, containingBlock); } #ifdef DEBUG if (gReallyNoisyContentUpdates && parentFrame) { nsIFrameDebug* fdbg = nsnull; CallQueryInterface(parentFrame, &fdbg); if (fdbg) { printf("nsCSSFrameConstructor::ContentRemoved: resulting frame model:\n"); fdbg->List(stdout, 0); } } #endif } return rv; } #ifdef DEBUG // To ensure that the functions below are only called within // |ApplyRenderingChangeToTree|. static PRBool gInApplyRenderingChangeToTree = PR_FALSE; #endif static void DoApplyRenderingChangeToTree(nsIFrame* aFrame, nsIViewManager* aViewManager, nsFrameManager* aFrameManager, nsChangeHint aChange); /** * @param aBoundsRect returns the bounds enclosing the areas covered by aFrame and its childre * This rect is relative to aFrame's parent */ static void UpdateViewsForTree(nsIFrame* aFrame, nsIViewManager* aViewManager, nsFrameManager* aFrameManager, nsChangeHint aChange) { NS_PRECONDITION(gInApplyRenderingChangeToTree, "should only be called within ApplyRenderingChangeToTree"); nsIView* view = aFrame->GetView(); if (view) { if (aChange & nsChangeHint_SyncFrameView) { nsContainerFrame::SyncFrameViewProperties(aFrame->PresContext(), aFrame, nsnull, view); } } // now do children of frame PRInt32 listIndex = 0; nsIAtom* childList = nsnull; do { nsIFrame* child = aFrame->GetFirstChild(childList); while (child) { if (!(child->GetStateBits() & NS_FRAME_OUT_OF_FLOW) || (child->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER)) { // only do frames that don't have placeholders if (nsGkAtoms::placeholderFrame == child->GetType()) { // placeholder // get out of flow frame and start over there nsIFrame* outOfFlowFrame = nsPlaceholderFrame::GetRealFrameForPlaceholder(child); DoApplyRenderingChangeToTree(outOfFlowFrame, aViewManager, aFrameManager, aChange); } else { // regular frame UpdateViewsForTree(child, aViewManager, aFrameManager, aChange); } } child = child->GetNextSibling(); } childList = aFrame->GetAdditionalChildListName(listIndex++); } while (childList); } static void DoApplyRenderingChangeToTree(nsIFrame* aFrame, nsIViewManager* aViewManager, nsFrameManager* aFrameManager, nsChangeHint aChange) { NS_PRECONDITION(gInApplyRenderingChangeToTree, "should only be called within ApplyRenderingChangeToTree"); for ( ; aFrame; aFrame = nsLayoutUtils::GetNextContinuationOrSpecialSibling(aFrame)) { // Get view if this frame has one and trigger an update. If the // frame doesn't have a view, find the nearest containing view // (adjusting r's coordinate system to reflect the nesting) and // update there. UpdateViewsForTree(aFrame, aViewManager, aFrameManager, aChange); // if frame has view, will already be invalidated if (aChange & nsChangeHint_RepaintFrame) { aFrame->Invalidate(aFrame->GetOverflowRect()); } } } static void ApplyRenderingChangeToTree(nsPresContext* aPresContext, nsIFrame* aFrame, nsChangeHint aChange) { nsIPresShell *shell = aPresContext->PresShell(); PRBool isPaintingSuppressed = PR_FALSE; shell->IsPaintingSuppressed(&isPaintingSuppressed); if (isPaintingSuppressed) { // Don't allow synchronous rendering changes when painting is turned off. aChange = NS_SubtractHint(aChange, nsChangeHint_RepaintFrame); if (!aChange) { return; } } // If the frame's background is propagated to an ancestor, walk up to // that ancestor. const nsStyleBackground *bg; PRBool isCanvas; while (!nsCSSRendering::FindBackground(aPresContext, aFrame, &bg, &isCanvas)) { aFrame = aFrame->GetParent(); NS_ASSERTION(aFrame, "root frame must paint"); } nsIViewManager* viewManager = aPresContext->GetViewManager(); // Trigger rendering updates by damaging this frame and any // continuations of this frame. // XXX this needs to detect the need for a view due to an opacity change and deal with it... viewManager->BeginUpdateViewBatch(); #ifdef DEBUG gInApplyRenderingChangeToTree = PR_TRUE; #endif DoApplyRenderingChangeToTree(aFrame, viewManager, shell->FrameManager(), aChange); #ifdef DEBUG gInApplyRenderingChangeToTree = PR_FALSE; #endif viewManager->EndUpdateViewBatch(NS_VMREFRESH_NO_SYNC); } /** * This method invalidates the canvas when frames are removed or added for a * node that might have its background propagated to the canvas, i.e., a * document root node or an HTML BODY which is a child of the root node. * * @param aFrame a frame for a content node about to be removed or a frme that * was just created for a content node that was inserted. */ static void InvalidateCanvasIfNeeded(nsIFrame* aFrame) { NS_ASSERTION(aFrame, "Must have frame!"); // Note that for both in ContentRemoved and ContentInserted the content node // will still have the right parent pointer, so looking at that is ok. nsIContent* node = aFrame->GetContent(); nsIContent* parent = node->GetParent(); if (parent) { // Has a parent; might not be what we want nsIContent* grandParent = parent->GetParent(); if (grandParent) { // Has a grandparent, so not what we want return; } // Check whether it's an HTML body if (node->Tag() != nsGkAtoms::body || !node->IsNodeOfType(nsINode::eHTML)) { return; } } // At this point the node has no parent or it's an HTML child of the // root. We might not need to invalidate in this case (eg we might be in // XHTML or something), but chances are we want to. Play it safe. Find the // frame to invalidate and do it. nsIFrame *ancestor = aFrame; const nsStyleBackground *bg; PRBool isCanvas; nsPresContext* presContext = aFrame->PresContext(); while (!nsCSSRendering::FindBackground(presContext, ancestor, &bg, &isCanvas)) { ancestor = ancestor->GetParent(); NS_ASSERTION(ancestor, "canvas must paint"); } if (ancestor->GetType() == nsGkAtoms::canvasFrame) { // The canvas frame's dimensions are not meaningful; invalidate the // viewport instead. ancestor = ancestor->GetParent(); } if (ancestor != aFrame) { // Wrap this in a DEFERRED view update batch so we don't try to // flush out layout here nsIViewManager* viewManager = presContext->GetViewManager(); viewManager->BeginUpdateViewBatch(); ApplyRenderingChangeToTree(presContext, ancestor, nsChangeHint_RepaintFrame); viewManager->EndUpdateViewBatch(NS_VMREFRESH_DEFERRED); } } nsresult nsCSSFrameConstructor::StyleChangeReflow(nsIFrame* aFrame) { // If the frame hasn't even received an initial reflow, then don't // send it a style-change reflow! if (aFrame->GetStateBits() & NS_FRAME_FIRST_REFLOW) return NS_OK; #ifdef DEBUG if (gNoisyContentUpdates) { printf("nsCSSFrameConstructor::StyleChangeReflow: aFrame="); nsFrame::ListTag(stdout, aFrame); printf("\n"); } #endif // If the frame is part of a split block-in-inline hierarchy, then // target the style-change reflow at the first ``normal'' ancestor // so we're sure that the style change will propagate to any // anonymously created siblings. if (IsFrameSpecial(aFrame)) aFrame = GetIBContainingBlockFor(aFrame); do { mPresShell->FrameNeedsReflow(aFrame, nsIPresShell::eStyleChange, NS_FRAME_IS_DIRTY); aFrame = aFrame->GetNextContinuation(); } while (aFrame); return NS_OK; } nsresult nsCSSFrameConstructor::CharacterDataChanged(nsIContent* aContent, PRBool aAppend) { AUTO_LAYOUT_PHASE_ENTRY_POINT(mPresShell->GetPresContext(), FrameC); nsresult rv = NS_OK; // Find the child frame nsIFrame* frame = mPresShell->GetPrimaryFrameFor(aContent); // Notify the first frame that maps the content. It will generate a reflow // command // It's possible the frame whose content changed isn't inserted into the // frame hierarchy yet, or that there is no frame that maps the content if (nsnull != frame) { #if 0 NS_FRAME_LOG(NS_FRAME_TRACE_CALLS, ("nsCSSFrameConstructor::CharacterDataChanged: content=%p[%s] subcontent=%p frame=%p", aContent, ContentTag(aContent, 0), aSubContent, frame)); #endif // Special check for text content that is a child of a letter frame. If // this happens, we should remove the letter frame, do whatever we're // planning to do with this notification, then put the letter frame back. // Note that this is basically what ReinsertContent ends up doing; the // reason we dont' want to call that here is that our text content could be // native anonymous, in which case ReinsertContent would completely barf on // it. And reinserting the non-anonymous ancestor would just lead us to // come back into this notification (e.g. if quotes or counters are // involved), leading to a loop. nsIFrame* block = GetFloatContainingBlock(frame); PRBool haveFirstLetterStyle = PR_FALSE; if (block) { // See if the block has first-letter style applied to it. haveFirstLetterStyle = HasFirstLetterStyle(block); if (haveFirstLetterStyle) { RemoveLetterFrames(mPresShell->GetPresContext(), mPresShell, mPresShell->FrameManager(), block); // Reget |frame|, since we might have killed it. // Do we really need to call CharacterDataChanged in this case, though? frame = mPresShell->GetPrimaryFrameFor(aContent); NS_ASSERTION(frame, "Should have frame here!"); } } frame->CharacterDataChanged(mPresShell->GetPresContext(), aContent, aAppend); if (haveFirstLetterStyle) { nsFrameConstructorState state(mPresShell, mFixedContainingBlock, GetAbsoluteContainingBlock(frame), block, nsnull); RecoverLetterFrames(state, block); } } return rv; } nsresult nsCSSFrameConstructor::ProcessRestyledFrames(nsStyleChangeList& aChangeList) { PRInt32 count = aChangeList.Count(); if (!count) return NS_OK; // Make sure to not rebuild quote or counter lists while we're // processing restyles BeginUpdate(); nsPropertyTable *propTable = mPresShell->GetPresContext()->PropertyTable(); // Mark frames so that we skip frames that die along the way, bug 123049. // A frame can be in the list multiple times with different hints. Further // optmization is possible if nsStyleChangeList::AppendChange could coalesce PRInt32 index = count; while (0 <= --index) { const nsStyleChangeData* changeData; aChangeList.ChangeAt(index, &changeData); if (changeData->mFrame) { propTable->SetProperty(changeData->mFrame, nsGkAtoms::changeListProperty, nsnull, nsnull, nsnull); } } index = count; while (0 <= --index) { nsIFrame* frame; nsIContent* content; nsChangeHint hint; aChangeList.ChangeAt(index, frame, content, hint); // skip any frame that has been destroyed due to a ripple effect if (frame) { nsresult res; propTable->GetProperty(frame, nsGkAtoms::changeListProperty, &res); if (NS_PROPTABLE_PROP_NOT_THERE == res) continue; } if (hint & nsChangeHint_ReconstructFrame) { RecreateFramesForContent(content); } else { NS_ASSERTION(frame, "This shouldn't happen"); if (hint & nsChangeHint_ReflowFrame) { StyleChangeReflow(frame); } if (hint & (nsChangeHint_RepaintFrame | nsChangeHint_SyncFrameView)) { ApplyRenderingChangeToTree(mPresShell->GetPresContext(), frame, hint); } if (hint & nsChangeHint_UpdateCursor) { nsIViewManager* viewMgr = mPresShell->GetViewManager(); if (viewMgr) viewMgr->SynthesizeMouseMove(PR_FALSE); } } } EndUpdate(); // cleanup references and verify the style tree. Note that the latter needs // to happen once we've processed the whole list, since until then the tree // is not in fact in a consistent state. index = count; while (0 <= --index) { const nsStyleChangeData* changeData; aChangeList.ChangeAt(index, &changeData); if (changeData->mFrame) { propTable->DeleteProperty(changeData->mFrame, nsGkAtoms::changeListProperty); } #ifdef DEBUG // reget frame from content since it may have been regenerated... if (changeData->mContent) { nsIFrame* frame = mPresShell->GetPrimaryFrameFor(changeData->mContent); if (frame) { mPresShell->FrameManager()->DebugVerifyStyleTree(frame); } } else { NS_WARNING("Unable to test style tree integrity -- no content node"); } #endif } aChangeList.Clear(); return NS_OK; } void nsCSSFrameConstructor::RestyleElement(nsIContent *aContent, nsIFrame *aPrimaryFrame, nsChangeHint aMinHint) { if (aMinHint & nsChangeHint_ReconstructFrame) { RecreateFramesForContent(aContent); } else if (aPrimaryFrame) { nsStyleChangeList changeList; if (aMinHint) { changeList.AppendChange(aPrimaryFrame, aContent, aMinHint); } nsChangeHint frameChange = mPresShell->FrameManager()-> ComputeStyleChangeFor(aPrimaryFrame, &changeList, aMinHint); if (frameChange & nsChangeHint_ReconstructFrame) { RecreateFramesForContent(aContent); changeList.Clear(); } else { ProcessRestyledFrames(changeList); } } else { // no frames, reconstruct for content MaybeRecreateFramesForContent(aContent); } } void nsCSSFrameConstructor::RestyleLaterSiblings(nsIContent *aContent) { nsIContent *parent = aContent->GetParent(); if (!parent) return; // root element has no later siblings for (PRInt32 index = parent->IndexOf(aContent) + 1, index_end = parent->GetChildCount(); index != index_end; ++index) { nsIContent *child = parent->GetChildAt(index); if (!child->IsNodeOfType(nsINode::eELEMENT)) continue; nsIFrame* primaryFrame = mPresShell->GetPrimaryFrameFor(child); RestyleElement(child, primaryFrame, NS_STYLE_HINT_NONE); } } nsresult nsCSSFrameConstructor::ContentStatesChanged(nsIContent* aContent1, nsIContent* aContent2, PRInt32 aStateMask) { DoContentStateChanged(aContent1, aStateMask); DoContentStateChanged(aContent2, aStateMask); return NS_OK; } void nsCSSFrameConstructor::DoContentStateChanged(nsIContent* aContent, PRInt32 aStateMask) { nsStyleSet *styleSet = mPresShell->StyleSet(); nsPresContext *presContext = mPresShell->GetPresContext(); NS_ASSERTION(styleSet, "couldn't get style set"); if (aContent) { nsChangeHint hint = NS_STYLE_HINT_NONE; // Any change to a content state that affects which frames we construct // must lead to a frame reconstruct here if we already have a frame. // Note that we never decide through non-CSS means to not create frames // based on content states, so if we already don't have a frame we don't // need to force a reframe -- if it's needed, the HasStateDependentStyle // call will handle things. nsIFrame* primaryFrame = mPresShell->GetPrimaryFrameFor(aContent); if (primaryFrame) { // If it's generated content, ignore LOADING/etc state changes on it. if (!primaryFrame->IsGeneratedContentFrame() && (aStateMask & (NS_EVENT_STATE_BROKEN | NS_EVENT_STATE_USERDISABLED | NS_EVENT_STATE_SUPPRESSED | NS_EVENT_STATE_LOADING))) { hint = nsChangeHint_ReconstructFrame; } else { PRUint8 app = primaryFrame->GetStyleDisplay()->mAppearance; if (app) { nsITheme *theme = presContext->GetTheme(); if (theme && theme->ThemeSupportsWidget(presContext, primaryFrame, app)) { PRBool repaint = PR_FALSE; theme->WidgetStateChanged(primaryFrame, app, nsnull, &repaint); if (repaint) { NS_UpdateHint(hint, nsChangeHint_RepaintFrame); } } } } } nsReStyleHint rshint = styleSet->HasStateDependentStyle(presContext, aContent, aStateMask); PostRestyleEvent(aContent, rshint, hint); } } nsresult nsCSSFrameConstructor::AttributeChanged(nsIContent* aContent, PRInt32 aNameSpaceID, nsIAtom* aAttribute, PRInt32 aModType, PRUint32 aStateMask) { nsresult result = NS_OK; // Hold onto the PresShell to prevent ourselves from being destroyed. // XXXbz how, exactly, would this attribute change cause us to be // destroyed from inside this function? nsCOMPtr shell = mPresShell; // Get the frame associated with the content which is the highest in the frame tree nsIFrame* primaryFrame = shell->GetPrimaryFrameFor(aContent); #if 0 NS_FRAME_LOG(NS_FRAME_TRACE_CALLS, ("HTMLStyleSheet::AttributeChanged: content=%p[%s] frame=%p", aContent, ContentTag(aContent, 0), frame)); #endif // the style tag has its own interpretation based on aHint nsChangeHint hint = aContent->GetAttributeChangeHint(aAttribute, aModType); PRBool reframe = (hint & nsChangeHint_ReconstructFrame) != 0; #ifdef MOZ_XUL // The following listbox widget trap prevents offscreen listbox widget // content from being removed and re-inserted (which is what would // happen otherwise). if (!primaryFrame && !reframe) { PRInt32 namespaceID; nsIAtom* tag = mDocument->BindingManager()->ResolveTag(aContent, &namespaceID); if (namespaceID == kNameSpaceID_XUL && (tag == nsGkAtoms::listitem || tag == nsGkAtoms::listcell)) return NS_OK; } if (aAttribute == nsGkAtoms::tooltiptext || aAttribute == nsGkAtoms::tooltip) { nsIRootBox* rootBox = nsIRootBox::GetRootBox(mPresShell); if (rootBox) { if (aModType == nsIDOMMutationEvent::REMOVAL) rootBox->RemoveTooltipSupport(aContent); if (aModType == nsIDOMMutationEvent::ADDITION) rootBox->AddTooltipSupport(aContent); } } #endif // MOZ_XUL if (primaryFrame) { // See if we have appearance information for a theme. const nsStyleDisplay* disp = primaryFrame->GetStyleDisplay(); if (disp->mAppearance) { nsPresContext* presContext = mPresShell->GetPresContext(); nsITheme *theme = presContext->GetTheme(); if (theme && theme->ThemeSupportsWidget(presContext, primaryFrame, disp->mAppearance)) { PRBool repaint = PR_FALSE; theme->WidgetStateChanged(primaryFrame, disp->mAppearance, aAttribute, &repaint); if (repaint) NS_UpdateHint(hint, nsChangeHint_RepaintFrame); } } // let the frame deal with it now, so we don't have to deal later result = primaryFrame->AttributeChanged(aNameSpaceID, aAttribute, aModType); // XXXwaterson should probably check for special IB siblings // here, and propagate the AttributeChanged notification to // them, as well. Currently, inline frames don't do anything on // this notification, so it's not that big a deal. } // See if we can optimize away the style re-resolution -- must be called after // the frame's AttributeChanged() in case it does something that affects the style nsFrameManager *frameManager = shell->FrameManager(); nsReStyleHint rshint = frameManager->HasAttributeDependentStyle(aContent, aAttribute, aModType, aStateMask); PostRestyleEvent(aContent, rshint, hint); return result; } void nsCSSFrameConstructor::EndUpdate() { if (mUpdateCount == 1) { // This is the end of our last update. Before we decrement // mUpdateCount, recalc quotes and counters as needed. RecalcQuotesAndCounters(); NS_ASSERTION(mUpdateCount == 1, "Odd update count"); } --mUpdateCount; } void nsCSSFrameConstructor::RecalcQuotesAndCounters() { if (mQuotesDirty) { mQuotesDirty = PR_FALSE; mQuoteList.RecalcAll(); } if (mCountersDirty) { mCountersDirty = PR_FALSE; mCounterManager.RecalcAll(); } NS_ASSERTION(!mQuotesDirty, "Quotes updates will be lost"); NS_ASSERTION(!mCountersDirty, "Counter updates will be lost"); } void nsCSSFrameConstructor::WillDestroyFrameTree() { #if defined(DEBUG_dbaron_off) mCounterManager.Dump(); #endif mIsDestroyingFrameTree = PR_TRUE; // Prevent frame tree destruction from being O(N^2) mQuoteList.Clear(); mCounterManager.Clear(); // Cancel all pending re-resolves mRestyleEvent.Revoke(); } //STATIC // XXXbz I'd really like this method to go away. Once we have inline-block and // I can just use that for sized broken images, that can happen, maybe. void nsCSSFrameConstructor::GetAlternateTextFor(nsIContent* aContent, nsIAtom* aTag, // content object's tag nsXPIDLString& aAltText) { // The "alt" attribute specifies alternate text that is rendered // when the image can not be displayed // If there's no "alt" attribute, and aContent is an input // element, then use the value of the "value" attribute if (!aContent->GetAttr(kNameSpaceID_None, nsGkAtoms::alt, aAltText) && nsGkAtoms::input == aTag) { // If there's no "value" attribute either, then use the localized string // for "Submit" as the alternate text. if (!aContent->GetAttr(kNameSpaceID_None, nsGkAtoms::value, aAltText)) { nsContentUtils::GetLocalizedString(nsContentUtils::eFORMS_PROPERTIES, "Submit", aAltText); } } } nsresult nsCSSFrameConstructor::CreateContinuingOuterTableFrame(nsIPresShell* aPresShell, nsPresContext* aPresContext, nsIFrame* aFrame, nsIFrame* aParentFrame, nsIContent* aContent, nsStyleContext* aStyleContext, nsIFrame** aContinuingFrame) { nsIFrame* newFrame = NS_NewTableOuterFrame(aPresShell, aStyleContext); if (newFrame) { newFrame->Init(aContent, aParentFrame, aFrame); // XXXbz should we be passing in a non-null aContentParentFrame? nsHTMLContainerFrame::CreateViewForFrame(newFrame, nsnull, PR_FALSE); // Create a continuing inner table frame, and if there's a caption then // replicate the caption nsFrameItems newChildFrames; nsIFrame* childFrame = aFrame->GetFirstChild(nsnull); if (childFrame) { nsIFrame* continuingTableFrame; nsresult rv = CreateContinuingFrame(aPresContext, childFrame, newFrame, &continuingTableFrame); if (NS_FAILED(rv)) { newFrame->Destroy(); *aContinuingFrame = nsnull; return rv; } newChildFrames.AddChild(continuingTableFrame); NS_ASSERTION(!childFrame->GetNextSibling(),"there can be only one inner table frame"); } // Set the outer table's initial child list newFrame->SetInitialChildList(nsnull, newChildFrames.childList); *aContinuingFrame = newFrame; return NS_OK; } else { *aContinuingFrame = nsnull; return NS_ERROR_OUT_OF_MEMORY; } } nsresult nsCSSFrameConstructor::CreateContinuingTableFrame(nsIPresShell* aPresShell, nsPresContext* aPresContext, nsIFrame* aFrame, nsIFrame* aParentFrame, nsIContent* aContent, nsStyleContext* aStyleContext, nsIFrame** aContinuingFrame) { nsIFrame* newFrame = NS_NewTableFrame(aPresShell, aStyleContext); if (newFrame) { newFrame->Init(aContent, aParentFrame, aFrame); // XXXbz should we be passing in a non-null aContentParentFrame? nsHTMLContainerFrame::CreateViewForFrame(newFrame, nsnull, PR_FALSE); // Replicate any header/footer frames nsFrameItems childFrames; nsIFrame* childFrame = aFrame->GetFirstChild(nsnull); for ( ; childFrame; childFrame = childFrame->GetNextSibling()) { // See if it's a header/footer, possibly wrapped in a scroll frame. nsTableRowGroupFrame* rowGroupFrame = nsTableFrame::GetRowGroupFrame(childFrame); if (rowGroupFrame) { // If the row group was continued, then don't replicate it. nsIFrame* rgNextInFlow = rowGroupFrame->GetNextInFlow(); if (rgNextInFlow) { rowGroupFrame->SetRepeatable(PR_FALSE); } else if (rowGroupFrame->IsRepeatable()) { // Replicate the header/footer frame. nsTableRowGroupFrame* headerFooterFrame; nsFrameItems childItems; nsFrameConstructorState state(mPresShell, mFixedContainingBlock, GetAbsoluteContainingBlock(newFrame), nsnull); headerFooterFrame = static_cast (NS_NewTableRowGroupFrame(aPresShell, rowGroupFrame->GetStyleContext())); nsIContent* headerFooter = rowGroupFrame->GetContent(); headerFooterFrame->Init(headerFooter, newFrame, nsnull); ProcessChildren(state, headerFooter, headerFooterFrame, PR_FALSE, childItems, PR_FALSE); NS_ASSERTION(!state.mFloatedItems.childList, "unexpected floated element"); headerFooterFrame->SetInitialChildList(nsnull, childItems.childList); headerFooterFrame->SetRepeatable(PR_TRUE); // Table specific initialization headerFooterFrame->InitRepeatedFrame(aPresContext, rowGroupFrame); // XXX Deal with absolute and fixed frames... childFrames.AddChild(headerFooterFrame); } } } // Set the table frame's initial child list newFrame->SetInitialChildList(nsnull, childFrames.childList); *aContinuingFrame = newFrame; return NS_OK; } else { *aContinuingFrame = nsnull; return NS_ERROR_OUT_OF_MEMORY; } } nsresult nsCSSFrameConstructor::CreateContinuingFrame(nsPresContext* aPresContext, nsIFrame* aFrame, nsIFrame* aParentFrame, nsIFrame** aContinuingFrame, PRBool aIsFluid) { nsIPresShell* shell = aPresContext->PresShell(); nsStyleContext* styleContext = aFrame->GetStyleContext(); nsIFrame* newFrame = nsnull; nsresult rv = NS_OK; nsIFrame* nextContinuation = aFrame->GetNextContinuation(); nsIFrame* nextInFlow = aFrame->GetNextInFlow(); // Use the frame type to determine what type of frame to create nsIAtom* frameType = aFrame->GetType(); nsIContent* content = aFrame->GetContent(); NS_ASSERTION(aFrame->GetSplittableType() != NS_FRAME_NOT_SPLITTABLE, "why CreateContinuingFrame for a non-splittable frame?"); if (nsGkAtoms::textFrame == frameType) { newFrame = NS_NewContinuingTextFrame(shell, styleContext); if (newFrame) { newFrame->Init(content, aParentFrame, aFrame); // XXXbz should we be passing in a non-null aContentParentFrame? nsHTMLContainerFrame::CreateViewForFrame(newFrame, nsnull, PR_FALSE); } } else if (nsGkAtoms::inlineFrame == frameType) { newFrame = NS_NewInlineFrame(shell, styleContext); if (newFrame) { newFrame->Init(content, aParentFrame, aFrame); // XXXbz should we be passing in a non-null aContentParentFrame? nsHTMLContainerFrame::CreateViewForFrame(newFrame, nsnull, PR_FALSE); } } else if (nsGkAtoms::blockFrame == frameType) { newFrame = NS_NewBlockFrame(shell, styleContext); if (newFrame) { newFrame->Init(content, aParentFrame, aFrame); // XXXbz should we be passing in a non-null aContentParentFrame? nsHTMLContainerFrame::CreateViewForFrame(newFrame, nsnull, PR_FALSE); } } else if (nsGkAtoms::areaFrame == frameType) { newFrame = NS_NewAreaFrame(shell, styleContext, 0); if (newFrame) { newFrame->Init(content, aParentFrame, aFrame); // XXXbz should we be passing in a non-null aContentParentFrame? nsHTMLContainerFrame::CreateViewForFrame(newFrame, nsnull, PR_FALSE); } } else if (nsGkAtoms::columnSetFrame == frameType) { newFrame = NS_NewColumnSetFrame(shell, styleContext, 0); if (newFrame) { newFrame->Init(content, aParentFrame, aFrame); // XXXbz should we be passing in a non-null aContentParentFrame? nsHTMLContainerFrame::CreateViewForFrame(newFrame, nsnull, PR_FALSE); } } else if (nsGkAtoms::positionedInlineFrame == frameType) { newFrame = NS_NewPositionedInlineFrame(shell, styleContext); if (newFrame) { newFrame->Init(content, aParentFrame, aFrame); // XXXbz should we be passing in a non-null aContentParentFrame? nsHTMLContainerFrame::CreateViewForFrame(newFrame, nsnull, PR_FALSE); } } else if (nsGkAtoms::pageFrame == frameType) { nsIFrame* pageContentFrame; rv = ConstructPageFrame(shell, aPresContext, aParentFrame, aFrame, newFrame, pageContentFrame); } else if (nsGkAtoms::tableOuterFrame == frameType) { rv = CreateContinuingOuterTableFrame(shell, aPresContext, aFrame, aParentFrame, content, styleContext, &newFrame); } else if (nsGkAtoms::tableFrame == frameType) { rv = CreateContinuingTableFrame(shell, aPresContext, aFrame, aParentFrame, content, styleContext, &newFrame); } else if (nsGkAtoms::tableRowGroupFrame == frameType) { newFrame = NS_NewTableRowGroupFrame(shell, styleContext); if (newFrame) { newFrame->Init(content, aParentFrame, aFrame); // XXXbz should we be passing in a non-null aContentParentFrame? nsHTMLContainerFrame::CreateViewForFrame(newFrame, nsnull, PR_FALSE); } } else if (nsGkAtoms::tableRowFrame == frameType) { newFrame = NS_NewTableRowFrame(shell, styleContext); if (newFrame) { newFrame->Init(content, aParentFrame, aFrame); // XXXbz should we be passing in a non-null aContentParentFrame? nsHTMLContainerFrame::CreateViewForFrame(newFrame, nsnull, PR_FALSE); // Create a continuing frame for each table cell frame nsFrameItems newChildList; nsIFrame* cellFrame = aFrame->GetFirstChild(nsnull); while (cellFrame) { // See if it's a table cell frame if (IS_TABLE_CELL(cellFrame->GetType())) { nsIFrame* continuingCellFrame; rv = CreateContinuingFrame(aPresContext, cellFrame, newFrame, &continuingCellFrame); if (NS_FAILED(rv)) { nsFrameList tmp(newChildList.childList); tmp.DestroyFrames(); newFrame->Destroy(); *aContinuingFrame = nsnull; return NS_ERROR_OUT_OF_MEMORY; } newChildList.AddChild(continuingCellFrame); } cellFrame = cellFrame->GetNextSibling(); } // Set the table cell's initial child list newFrame->SetInitialChildList(nsnull, newChildList.childList); } } else if (IS_TABLE_CELL(frameType)) { // Warning: If you change this and add a wrapper frame around table cell // frames, make sure Bug 368554 doesn't regress! // See IsInAutoWidthTableCellForQuirk() in nsImageFrame.cpp. newFrame = NS_NewTableCellFrame(shell, styleContext, IsBorderCollapse(aParentFrame)); if (newFrame) { newFrame->Init(content, aParentFrame, aFrame); // XXXbz should we be passing in a non-null aContentParentFrame? nsHTMLContainerFrame::CreateViewForFrame(newFrame, nsnull, PR_FALSE); // Create a continuing area frame nsIFrame* continuingAreaFrame; nsIFrame* areaFrame = aFrame->GetFirstChild(nsnull); rv = CreateContinuingFrame(aPresContext, areaFrame, newFrame, &continuingAreaFrame); if (NS_FAILED(rv)) { newFrame->Destroy(); *aContinuingFrame = nsnull; return rv; } // Set the table cell's initial child list newFrame->SetInitialChildList(nsnull, continuingAreaFrame); } } else if (nsGkAtoms::lineFrame == frameType) { newFrame = NS_NewFirstLineFrame(shell, styleContext); if (newFrame) { newFrame->Init(content, aParentFrame, aFrame); // XXXbz should we be passing in a non-null aContentParentFrame? nsHTMLContainerFrame::CreateViewForFrame(newFrame, nsnull, PR_FALSE); } } else if (nsGkAtoms::letterFrame == frameType) { newFrame = NS_NewFirstLetterFrame(shell, styleContext); if (newFrame) { newFrame->Init(content, aParentFrame, aFrame); // XXXbz should we be passing in a non-null aContentParentFrame? nsHTMLContainerFrame::CreateViewForFrame(newFrame, nsnull, PR_FALSE); } } else if (nsGkAtoms::imageFrame == frameType) { newFrame = NS_NewImageFrame(shell, styleContext); if (newFrame) { newFrame->Init(content, aParentFrame, aFrame); } } else if (nsGkAtoms::imageControlFrame == frameType) { newFrame = NS_NewImageControlFrame(shell, styleContext); if (newFrame) { newFrame->Init(content, aParentFrame, aFrame); } } else if (nsGkAtoms::placeholderFrame == frameType) { // create a continuing out of flow frame nsIFrame* oofFrame = nsPlaceholderFrame::GetRealFrameForPlaceholder(aFrame); nsIFrame* oofContFrame; rv = CreateContinuingFrame(aPresContext, oofFrame, aParentFrame, &oofContFrame); if (NS_FAILED(rv)) { *aContinuingFrame = nsnull; return rv; } // create a continuing placeholder frame rv = CreatePlaceholderFrameFor(shell, content, oofContFrame, styleContext, aParentFrame, aFrame, &newFrame); if (NS_FAILED(rv)) { oofContFrame->Destroy(); *aContinuingFrame = nsnull; return rv; } } else if (nsGkAtoms::fieldSetFrame == frameType) { newFrame = NS_NewFieldSetFrame(shell, styleContext); if (newFrame) { newFrame->Init(content, aParentFrame, aFrame); // XXXbz should we be passing in a non-null aContentParentFrame? nsHTMLContainerFrame::CreateViewForFrame(newFrame, nsnull, PR_FALSE); // Create a continuing area frame // XXXbz we really shouldn't have to do this by hand! nsIFrame* continuingAreaFrame; nsIFrame* areaFrame = GetFieldSetAreaFrame(aFrame); rv = CreateContinuingFrame(aPresContext, areaFrame, newFrame, &continuingAreaFrame); if (NS_FAILED(rv)) { newFrame->Destroy(); *aContinuingFrame = nsnull; return rv; } // Set the fieldset's initial child list newFrame->SetInitialChildList(nsnull, continuingAreaFrame); } } else { NS_NOTREACHED("unexpected frame type"); *aContinuingFrame = nsnull; return NS_ERROR_UNEXPECTED; } *aContinuingFrame = newFrame; if (!newFrame) { return NS_ERROR_OUT_OF_MEMORY; } // Init() set newFrame to be a fluid continuation of aFrame. // If we want a non-fluid continuation, we need to call SetPrevContinuation() // to reset NS_FRAME_IS_FLUID_CONTINUATION. if (!aIsFluid) { newFrame->SetPrevContinuation(aFrame); } // A continuation of generated content is also generated content if (aFrame->GetStateBits() & NS_FRAME_GENERATED_CONTENT) { newFrame->AddStateBits(NS_FRAME_GENERATED_CONTENT); } // A continuation of an out-of-flow is also an out-of-flow if (aFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW) { newFrame->AddStateBits(NS_FRAME_OUT_OF_FLOW); } if (nextInFlow) { nextInFlow->SetPrevInFlow(newFrame); newFrame->SetNextInFlow(nextInFlow); } else if (nextContinuation) { nextContinuation->SetPrevContinuation(newFrame); newFrame->SetNextContinuation(nextContinuation); } return NS_OK; } nsresult nsCSSFrameConstructor::ReplicateFixedFrames(nsPageContentFrame* aParentFrame) { // Now deal with fixed-pos things.... They should appear on all pages, and // the placeholders must be kids of a block, so we want to move over the // placeholders when processing the child of the pageContentFrame. nsIFrame* prevPageContentFrame = aParentFrame->GetPrevInFlow(); if (!prevPageContentFrame) { return NS_OK; } nsIFrame* docRootFrame = aParentFrame->GetFirstChild(nsnull); nsIFrame* prevDocRootFrame = prevPageContentFrame->GetFirstChild(nsnull); if (!docRootFrame || !prevDocRootFrame) { // document's root element frame missing return NS_ERROR_UNEXPECTED; } nsFrameItems fixedPlaceholders; nsIFrame* firstFixed = prevPageContentFrame->GetFirstChild(nsGkAtoms::fixedList); if (!firstFixed) { return NS_OK; } //XXXbz Should mInitialContainingBlock be docRootFrame? It probably doesn't matter. // Don't allow abs-pos descendants of the fixed content to escape the content. // This should not normally be possible (because fixed-pos elements should // be absolute containers) but fixed-pos tables currently aren't abs-pos // containers. nsFrameConstructorState state(mPresShell, aParentFrame, nsnull, mInitialContainingBlock); // Iterate across fixed frames and replicate each whose placeholder is a // descendant of aFrame. (We don't want to explicitly copy placeholders that // are within fixed frames, because that would cause duplicates on the new // page - bug 389619) for (nsIFrame* fixed = firstFixed; fixed; fixed = fixed->GetNextSibling()) { nsIFrame* prevPlaceholder = nsnull; mPresShell->GetPlaceholderFrameFor(fixed, &prevPlaceholder); if (prevPlaceholder && nsLayoutUtils::IsProperAncestorFrame(prevDocRootFrame, prevPlaceholder)) { nsresult rv = ConstructFrame(state, fixed->GetContent(), docRootFrame, fixedPlaceholders); NS_ENSURE_SUCCESS(rv, rv); } } // Add the placeholders to our primary child list. // XXXbz this is a little screwed up, since the fixed frames will have the // wrong parent block and hence auto-positioning will be broken. Oh, well. NS_ASSERTION(!docRootFrame->GetFirstChild(nsnull), "leaking frames; doc root continuation must be empty"); docRootFrame->SetInitialChildList(nsnull, fixedPlaceholders.childList); return NS_OK; } static PRBool IsBindingAncestor(nsIContent* aContent, nsIContent* aBindingRoot) { while (PR_TRUE) { nsIContent* bindingParent = aContent->GetBindingParent(); if (!bindingParent) return PR_FALSE; if (bindingParent == aBindingRoot) return PR_TRUE; if (bindingParent == aContent) return PR_FALSE; aContent = bindingParent; } } // Helper function that searches the immediate child frames // (and their children if the frames are "special") // for a frame that maps the specified content object nsIFrame* nsCSSFrameConstructor::FindFrameWithContent(nsFrameManager* aFrameManager, nsIFrame* aParentFrame, nsIContent* aParentContent, nsIContent* aContent, nsFindFrameHint* aHint) { #ifdef NOISY_FINDFRAME FFWC_totalCount++; printf("looking for content=%p, given aParentFrame %p parentContent %p, hint is %s\n", aContent, aParentFrame, aParentContent, aHint ? "set" : "NULL"); #endif NS_ENSURE_TRUE(aParentFrame != nsnull, nsnull); do { // Search for the frame in each child list that aParentFrame supports nsIAtom* listName = nsnull; PRInt32 listIndex = 0; PRBool searchAgain; do { #ifdef NOISY_FINDFRAME FFWC_doLoop++; #endif nsIFrame* kidFrame = nsnull; searchAgain = PR_FALSE; // if we were given an hint, try to use it here to find a good // previous frame to start our search (|kidFrame|). if (aHint) { #ifdef NOISY_FINDFRAME printf(" hint frame is %p\n", aHint->mPrimaryFrameForPrevSibling); #endif // start with the primary frame for aContent's previous sibling kidFrame = aHint->mPrimaryFrameForPrevSibling; // But if it's out of flow, start from its placeholder. if (kidFrame && (kidFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW)) { kidFrame = aFrameManager->GetPlaceholderFrameFor(kidFrame); } if (kidFrame) { // then use the next sibling frame as our starting point if (kidFrame->GetNextSibling()) { kidFrame = kidFrame->GetNextSibling(); } else { // The hint frame had no next sibling. Try the next-in-flow or // special sibling of the parent of the hint frame (or its // associated placeholder). nsIFrame *parentFrame = kidFrame->GetParent(); kidFrame = nsnull; if (parentFrame) { parentFrame = nsLayoutUtils::GetNextContinuationOrSpecialSibling(parentFrame); } if (parentFrame) { // Found it, continue the search with its first child. kidFrame = parentFrame->GetFirstChild(listName); // Leave |aParentFrame| as-is, since the only time we'll // reuse it is if the hint fails. } } #ifdef NOISY_FINDFRAME printf(" hint gives us kidFrame=%p with parent frame %p content %p\n", kidFrame, aParentFrame, aParentContent); #endif } } if (!kidFrame) { // we didn't have enough info to prune, start searching from the beginning kidFrame = aParentFrame->GetFirstChild(listName); } while (kidFrame) { // See if the child frame points to the content object we're // looking for nsIContent* kidContent = kidFrame->GetContent(); if (kidContent == aContent) { // We found a match. Return the out-of-flow if it's a placeholder return nsPlaceholderFrame::GetRealFrameFor(kidFrame); } // only do this if there is content if (kidContent) { // We search the immediate children only, but if the child frame has // the same content pointer as its parent then we need to search its // child frames, too. // We also need to search if the child content is anonymous and scoped // to the parent content. if (aParentContent == kidContent || (aParentContent && IsBindingAncestor(kidContent, aParentContent))) { #ifdef NOISY_FINDFRAME FFWC_recursions++; printf(" recursing with new parent set to kidframe=%p, parentContent=%p\n", kidFrame, aParentContent); #endif nsIFrame* matchingFrame = FindFrameWithContent(aFrameManager, nsPlaceholderFrame::GetRealFrameFor(kidFrame), aParentContent, aContent, nsnull); if (matchingFrame) { return matchingFrame; } } } // Get the next sibling frame kidFrame = kidFrame->GetNextSibling(); #ifdef NOISY_FINDFRAME FFWC_doSibling++; if (kidFrame) { printf(" searching sibling frame %p\n", kidFrame); } #endif } if (aHint) { // If we get here, and we had a hint, then we didn't find a frame. // The hint may have been a frame whose location in the frame tree // doesn't match the location of its corresponding element in the // DOM tree, e.g. a floated or absolutely positioned frame, or e.g. // a frame, in which case we'd be off in the weeds looking // through something other than the primary frame list. // Reboot the search from scratch, without the hint, but using the // null child list again. aHint = nsnull; searchAgain = PR_TRUE; } else { do { listName = aParentFrame->GetAdditionalChildListName(listIndex++); } while (IsOutOfFlowList(listName)); } } while(listName || searchAgain); // We didn't find a matching frame. If aFrame has a next-in-flow, // then continue looking there aParentFrame = nsLayoutUtils::GetNextContinuationOrSpecialSibling(aParentFrame); #ifdef NOISY_FINDFRAME if (aParentFrame) { FFWC_nextInFlows++; printf(" searching NIF frame %p\n", aParentFrame); } #endif } while (aParentFrame); // No matching frame return nsnull; } // Request to find the primary frame associated with a given content object. // This is typically called by the pres shell when there is no mapping in // the pres shell hash table nsresult nsCSSFrameConstructor::FindPrimaryFrameFor(nsFrameManager* aFrameManager, nsIContent* aContent, nsIFrame** aFrame, nsFindFrameHint* aHint) { NS_ASSERTION(aFrameManager && aContent && aFrame, "bad arg"); *aFrame = nsnull; // initialize OUT parameter // We want to be able to quickly map from a content object to its frame, // but we also want to keep the hash table small. Therefore, many frames // are not added to the hash table when they're first created: // - text frames // - inline frames (often things like FONT and B) // - BR frames // - internal table frames (row-group, row, cell, col-group, col) // // That means we need to need to search for the frame nsIFrame* parentFrame; // this pointer is used to iterate across all frames that map to parentContent // Get the frame that corresponds to the parent content object. // Note that this may recurse indirectly, because the pres shell will // call us back if there is no mapping in the hash table nsCOMPtr parentContent = aContent->GetParent(); // Get this once if (parentContent) { parentFrame = aFrameManager->GetPrimaryFrameFor(parentContent, -1); while (parentFrame) { // Search the child frames for a match *aFrame = FindFrameWithContent(aFrameManager, parentFrame, parentContent, aContent, aHint); #ifdef NOISY_FINDFRAME printf("FindFrameWithContent returned %p\n", *aFrame); #endif #ifdef DEBUG // if we're given a hint and we were told to verify, then compare the resulting frame with // the frame we get by calling FindFrameWithContent *without* the hint. // Assert if they do not match // Note that this makes finding frames *slower* than it was before the fix. if (gVerifyFastFindFrame && aHint) { #ifdef NOISY_FINDFRAME printf("VERIFYING...\n"); #endif nsIFrame *verifyTestFrame = FindFrameWithContent(aFrameManager, parentFrame, parentContent, aContent, nsnull); #ifdef NOISY_FINDFRAME printf("VERIFY returned %p\n", verifyTestFrame); #endif NS_ASSERTION(verifyTestFrame == *aFrame, "hint shortcut found wrong frame"); } #endif // If we found a match, then add a mapping to the hash table so // next time this will be quick if (*aFrame) { aFrameManager->SetPrimaryFrameFor(aContent, *aFrame); break; } else if (IsFrameSpecial(parentFrame)) { // If it's a "special" frame (that is, part of an inline // that's been split because it contained a block), we need to // follow the out-of-flow "special sibling" link, and search // *that* subtree as well. parentFrame = GetSpecialSibling(parentFrame); } else { break; } } } if (aHint && !*aFrame) { // if we had a hint, and we didn't get a frame, see if we should try the slow way if (aContent->IsNodeOfType(nsINode::eTEXT)) { #ifdef NOISY_FINDFRAME FFWC_slowSearchForText++; #endif // since we're passing in a null hint, we're guaranteed to only recurse once return FindPrimaryFrameFor(aFrameManager, aContent, aFrame, nsnull); } } #ifdef NOISY_FINDFRAME printf("%10s %10s %10s %10s %10s \n", "total", "doLoop", "doSibling", "recur", "nextIF", "slowSearch"); printf("%10d %10d %10d %10d %10d \n", FFWC_totalCount, FFWC_doLoop, FFWC_doSibling, FFWC_recursions, FFWC_nextInFlows, FFWC_slowSearchForText); #endif return NS_OK; } nsresult nsCSSFrameConstructor::GetInsertionPoint(nsIFrame* aParentFrame, nsIContent* aChildContent, nsIFrame** aInsertionPoint, PRBool* aMultiple) { // Make the insertion point be the parent frame by default, in case // we have to bail early. *aInsertionPoint = aParentFrame; nsIContent* container = aParentFrame->GetContent(); if (!container) return NS_OK; nsBindingManager *bindingManager = mDocument->BindingManager(); nsIContent* insertionElement; if (aChildContent) { // We've got an explicit insertion child. Check to see if it's // anonymous. if (aChildContent->GetBindingParent() == container) { // This child content is anonymous. Don't use the insertion // point, since that's only for the explicit kids. return NS_OK; } PRUint32 index; insertionElement = bindingManager->GetInsertionPoint(container, aChildContent, &index); } else { PRBool multiple; PRUint32 index; insertionElement = bindingManager->GetSingleInsertionPoint(container, &index, &multiple); if (multiple && aMultiple) *aMultiple = multiple; // Record the fact that filters are in use. } if (insertionElement) { nsIFrame* insertionPoint = mPresShell->GetPrimaryFrameFor(insertionElement); if (insertionPoint) { // Use the content insertion frame of the insertion point. insertionPoint = insertionPoint->GetContentInsertionFrame(); if (insertionPoint && insertionPoint != aParentFrame) GetInsertionPoint(insertionPoint, aChildContent, aInsertionPoint, aMultiple); } else { // There was no frame created yet for the insertion point. *aInsertionPoint = nsnull; } } // fieldsets have multiple insertion points. Note that we might // have to look at insertionElement here... if (aMultiple && !*aMultiple) { nsIContent* content = insertionElement ? insertionElement : container; if (content->IsNodeOfType(nsINode::eHTML) && content->Tag() == nsGkAtoms::fieldset) { *aMultiple = PR_TRUE; } } return NS_OK; } // Capture state for the frame tree rooted at the frame associated with the // content object, aContent nsresult nsCSSFrameConstructor::CaptureStateForFramesOf(nsIContent* aContent, nsILayoutHistoryState* aHistoryState) { nsIFrame* frame = mPresShell->GetPrimaryFrameFor(aContent); if (frame) { CaptureStateFor(frame, aHistoryState); } return NS_OK; } // Capture state for the frame tree rooted at aFrame. nsresult nsCSSFrameConstructor::CaptureStateFor(nsIFrame* aFrame, nsILayoutHistoryState* aHistoryState) { if (aFrame && aHistoryState) { mPresShell->FrameManager()->CaptureFrameState(aFrame, aHistoryState); } return NS_OK; } nsresult nsCSSFrameConstructor::MaybeRecreateFramesForContent(nsIContent* aContent) { nsresult result = NS_OK; nsFrameManager *frameManager = mPresShell->FrameManager(); nsStyleContext *oldContext = frameManager->GetUndisplayedContent(aContent); if (oldContext) { // The parent has a frame, so try resolving a new context. nsRefPtr newContext = mPresShell->StyleSet()-> ResolveStyleFor(aContent, oldContext->GetParent()); frameManager->ChangeUndisplayedContent(aContent, newContext); if (newContext->GetStyleDisplay()->mDisplay != NS_STYLE_DISPLAY_NONE) { result = RecreateFramesForContent(aContent); } } return result; } PRBool nsCSSFrameConstructor::MaybeRecreateContainerForIBSplitterFrame(nsIFrame* aFrame, nsresult* aResult) { NS_PRECONDITION(aFrame, "Must have a frame"); NS_PRECONDITION(aFrame->GetParent(), "Frame shouldn't be root"); NS_PRECONDITION(aResult, "Null out param?"); NS_PRECONDITION(aFrame == aFrame->GetFirstContinuation(), "aFrame not the result of GetPrimaryFrameFor()?"); if (IsFrameSpecial(aFrame)) { // The removal functions can't handle removal of an {ib} split directly; we // need to rebuild the containing block. #ifdef DEBUG if (gNoisyContentUpdates) { printf("nsCSSFrameConstructor::MaybeRecreateContainerForIBSplitterFrame: " "frame="); nsFrame::ListTag(stdout, aFrame); printf(" is special\n"); } #endif *aResult = ReframeContainingBlock(aFrame); return PR_TRUE; } // We might still need to reconstruct things if the parent of aFrame is // special, since in that case the removal of aFrame might affect the // splitting of its parent. nsIFrame* parent = aFrame->GetParent(); if (!IsFrameSpecial(parent)) { return PR_FALSE; } // If aFrame is an inline, then it cannot possibly have caused the splitting. // If the frame is being reconstructed and being changed to a block, the // ContentInserted call will handle the containing block reframe. So in this // case, try to be conservative about whether we need to reframe. The only // case when it's needed is if the inline is the only child of the tail end // of an {ib} split, because the splitting code doesn't produce this tail end // if it would have no kids. If that ever changes, this code should change. if (IsInlineOutside(aFrame) && ( // Not a kid of the third part of the IB split GetSpecialSibling(parent) || !IsInlineOutside(parent) || // Or not the only child aFrame->GetLastContinuation()->GetNextSibling() || aFrame != parent->GetFirstContinuation()->GetFirstChild(nsnull) )) { return PR_FALSE; } #ifdef DEBUG if (gNoisyContentUpdates) { printf("nsCSSFrameConstructor::MaybeRecreateContainerForIBSplitterFrame: " "frame="); nsFrame::ListTag(stdout, parent); printf(" is special\n"); } #endif *aResult = ReframeContainingBlock(parent); return PR_TRUE; } nsresult nsCSSFrameConstructor::RecreateFramesForContent(nsIContent* aContent) { // If there is no document, we don't want to recreate frames for it. (You // shouldn't generally be giving this method content without a document // anyway). // Rebuilding the frame tree can have bad effects, especially if it's the // frame tree for chrome (see bug 157322). NS_ENSURE_TRUE(aContent->GetDocument(), NS_ERROR_FAILURE); // Is the frame `special'? If so, we need to reframe the containing // block *here*, rather than trying to remove and re-insert the // content (which would otherwise result in *two* nested reframe // containing block from ContentRemoved() and ContentInserted(), // below!). We'd really like to optimize away one of those // containing block reframes, hence the code here. nsIFrame* frame = mPresShell->GetPrimaryFrameFor(aContent); if (frame && frame->IsFrameOfType(nsIFrame::eMathML)) { // Reframe the topmost MathML element to prevent exponential blowup // (see bug 397518) while (PR_TRUE) { nsIContent* parentContent = aContent->GetParent(); nsIFrame* parentContentFrame = mPresShell->GetPrimaryFrameFor(parentContent); if (!parentContentFrame || !parentContentFrame->IsFrameOfType(nsIFrame::eMathML)) break; aContent = parentContent; frame = parentContentFrame; } } nsresult rv = NS_OK; if (frame && MaybeRecreateContainerForIBSplitterFrame(frame, &rv)) { return rv; } nsCOMPtr container = aContent->GetParent(); if (container) { // XXXbz what if this is anonymous content? PRInt32 indexInContainer = container->IndexOf(aContent); // Before removing the frames associated with the content object, // ask them to save their state onto a temporary state object. CaptureStateForFramesOf(aContent, mTempFrameTreeState); // Remove the frames associated with the content object on which // the attribute change occurred. PRBool didReconstruct; rv = ContentRemoved(container, aContent, indexInContainer, &didReconstruct); if (NS_SUCCEEDED(rv) && !didReconstruct) { // Now, recreate the frames associated with this content object. If // ContentRemoved triggered reconstruction, then we don't need to do this // because the frames will already have been built. rv = ContentInserted(container, aContent, indexInContainer, mTempFrameTreeState); } } else { // The content is the root node, so just rebuild the world. ReconstructDocElementHierarchy(); } #ifdef ACCESSIBILITY if (mPresShell->IsAccessibilityActive()) { PRUint32 event; if (frame) { nsIFrame *newFrame = mPresShell->GetPrimaryFrameFor(aContent); event = newFrame ? PRUint32(nsIAccessibleEvent::EVENT_ASYNCH_SIGNIFICANT_CHANGE) : PRUint32(nsIAccessibleEvent::EVENT_ASYNCH_HIDE); } else { event = nsIAccessibleEvent::EVENT_ASYNCH_SHOW; } // A significant enough change occured that this part // of the accessible tree is no longer valid. nsCOMPtr accService = do_GetService("@mozilla.org/accessibilityService;1"); if (accService) { accService->InvalidateSubtreeFor(mPresShell, aContent, event); } } #endif return rv; } ////////////////////////////////////////////////////////////////////// // Block frame construction code already_AddRefed nsCSSFrameConstructor::GetFirstLetterStyle(nsIContent* aContent, nsStyleContext* aStyleContext) { if (aContent) { return mPresShell->StyleSet()-> ResolvePseudoStyleFor(aContent, nsCSSPseudoElements::firstLetter, aStyleContext); } return nsnull; } already_AddRefed nsCSSFrameConstructor::GetFirstLineStyle(nsIContent* aContent, nsStyleContext* aStyleContext) { if (aContent) { return mPresShell->StyleSet()-> ResolvePseudoStyleFor(aContent, nsCSSPseudoElements::firstLine, aStyleContext); } return nsnull; } // Predicate to see if a given content (block element) has // first-letter style applied to it. PRBool nsCSSFrameConstructor::ShouldHaveFirstLetterStyle(nsIContent* aContent, nsStyleContext* aStyleContext) { return nsLayoutUtils::HasPseudoStyle(aContent, aStyleContext, nsCSSPseudoElements::firstLetter, mPresShell->GetPresContext()); } PRBool nsCSSFrameConstructor::HasFirstLetterStyle(nsIFrame* aBlockFrame) { NS_PRECONDITION(aBlockFrame, "Need a frame"); #ifdef DEBUG nsBlockFrame* block; NS_ASSERTION(NS_SUCCEEDED(aBlockFrame->QueryInterface(kBlockFrameCID, (void**)&block)) && block, "Not a block frame?"); #endif return (aBlockFrame->GetStateBits() & NS_BLOCK_HAS_FIRST_LETTER_STYLE) != 0; } PRBool nsCSSFrameConstructor::ShouldHaveFirstLineStyle(nsIContent* aContent, nsStyleContext* aStyleContext) { return nsLayoutUtils::HasPseudoStyle(aContent, aStyleContext, nsCSSPseudoElements::firstLine, mPresShell->GetPresContext()); } void nsCSSFrameConstructor::ShouldHaveSpecialBlockStyle(nsIContent* aContent, nsStyleContext* aStyleContext, PRBool* aHaveFirstLetterStyle, PRBool* aHaveFirstLineStyle) { *aHaveFirstLetterStyle = ShouldHaveFirstLetterStyle(aContent, aStyleContext); *aHaveFirstLineStyle = ShouldHaveFirstLineStyle(aContent, aStyleContext); } /** * Request to process the child content elements and create frames. * * @param aContent the content object whose child elements to process * @param aFrame the frame associated with aContent. This will be the * parent frame (both content and geometric) for the flowed * child frames */ nsresult nsCSSFrameConstructor::ProcessChildren(nsFrameConstructorState& aState, nsIContent* aContent, nsIFrame* aFrame, PRBool aCanHaveGeneratedContent, nsFrameItems& aFrameItems, PRBool aParentIsBlock) { NS_PRECONDITION(!aFrame->IsLeaf(), "Bogus ProcessChildren caller!"); // XXXbz ideally, this would do all the pushing of various // containing blocks as needed, so callers don't have to do it... nsresult rv = NS_OK; // :before/:after content should have the same style context parent // as normal kids. nsStyleContext* styleContext = nsFrame::CorrectStyleParentFrame(aFrame, nsnull)->GetStyleContext(); if (aCanHaveGeneratedContent) { // Probe for generated content before nsIFrame* generatedFrame; if (CreateGeneratedContentFrame(aState, aFrame, aContent, styleContext, nsCSSPseudoElements::before, &generatedFrame)) { // Add the generated frame to the child list aFrameItems.AddChild(generatedFrame); } } // save the incoming pseudo frame state nsPseudoFrames priorPseudoFrames; aState.mPseudoFrames.Reset(&priorPseudoFrames); ChildIterator iter, last; for (ChildIterator::Init(aContent, &iter, &last); iter != last; ++iter) { rv = ConstructFrame(aState, nsCOMPtr(*iter), aFrame, aFrameItems); if (NS_FAILED(rv)) return rv; } // process the current pseudo frame state if (!aState.mPseudoFrames.IsEmpty()) { ProcessPseudoFrames(aState, aFrameItems); } // restore the incoming pseudo frame state aState.mPseudoFrames = priorPseudoFrames; if (aCanHaveGeneratedContent) { // Probe for generated content after nsIFrame* generatedFrame; if (CreateGeneratedContentFrame(aState, aFrame, aContent, styleContext, nsCSSPseudoElements::after, &generatedFrame)) { // Add the generated frame to the child list aFrameItems.AddChild(generatedFrame); } } if (aParentIsBlock) { if (aState.mFirstLetterStyle) { rv = WrapFramesInFirstLetterFrame(aState, aContent, aFrame, aFrameItems); } if (aState.mFirstLineStyle) { rv = WrapFramesInFirstLineFrame(aState, aContent, aFrame, aFrameItems); } } return rv; } //---------------------------------------------------------------------- // Support for :first-line style // Special routine to handle placing a list of frames into a block // frame that has first-line style. The routine ensures that the first // collection of inline frames end up in a first-line frame. nsresult nsCSSFrameConstructor::WrapFramesInFirstLineFrame( nsFrameConstructorState& aState, nsIContent* aBlockContent, nsIFrame* aBlockFrame, nsFrameItems& aFrameItems) { nsresult rv = NS_OK; // Find the first and last inline frame in aFrameItems nsIFrame* kid = aFrameItems.childList; nsIFrame* firstInlineFrame = nsnull; nsIFrame* lastInlineFrame = nsnull; while (kid) { if (IsInlineOutside(kid)) { if (!firstInlineFrame) firstInlineFrame = kid; lastInlineFrame = kid; } else { break; } kid = kid->GetNextSibling(); } // If we don't find any inline frames, then there is nothing to do if (!firstInlineFrame) { return rv; } // Create line frame nsStyleContext* parentStyle = nsFrame::CorrectStyleParentFrame(aBlockFrame, nsCSSPseudoElements::firstLine)-> GetStyleContext(); nsRefPtr firstLineStyle = GetFirstLineStyle(aBlockContent, parentStyle); nsIFrame* lineFrame = NS_NewFirstLineFrame(mPresShell, firstLineStyle); if (lineFrame) { // Initialize the line frame rv = InitAndRestoreFrame(aState, aBlockContent, aBlockFrame, nsnull, lineFrame); // Mangle the list of frames we are giving to the block: first // chop the list in two after lastInlineFrame nsIFrame* secondBlockFrame = lastInlineFrame->GetNextSibling(); lastInlineFrame->SetNextSibling(nsnull); // The lineFrame will be the block's first child; the rest of the // frame list (after lastInlineFrame) will be the second and // subsequent children; join the list together and reset // aFrameItems appropriately. if (secondBlockFrame) { lineFrame->SetNextSibling(secondBlockFrame); } if (aFrameItems.childList == lastInlineFrame) { // Just in case the block had exactly one inline child aFrameItems.lastChild = lineFrame; } aFrameItems.childList = lineFrame; // Give the inline frames to the lineFrame after reparenting them kid = firstInlineFrame; NS_ASSERTION(lineFrame->GetStyleContext() == firstLineStyle, "Bogus style context on line frame"); while (kid) { ReparentFrame(aState.mFrameManager, lineFrame, kid); kid = kid->GetNextSibling(); } lineFrame->SetInitialChildList(nsnull, firstInlineFrame); } else { rv = NS_ERROR_OUT_OF_MEMORY; } return rv; } // Special routine to handle appending a new frame to a block frame's // child list. Takes care of placing the new frame into the right // place when first-line style is present. nsresult nsCSSFrameConstructor::AppendFirstLineFrames( nsFrameConstructorState& aState, nsIContent* aBlockContent, nsIFrame* aBlockFrame, nsFrameItems& aFrameItems) { // It's possible that aBlockFrame needs to have a first-line frame // created because it doesn't currently have any children. nsIFrame* blockKid = aBlockFrame->GetFirstChild(nsnull); if (!blockKid) { return WrapFramesInFirstLineFrame(aState, aBlockContent, aBlockFrame, aFrameItems); } // Examine the last block child - if it's a first-line frame then // appended frames need special treatment. nsresult rv = NS_OK; nsFrameList blockFrames(blockKid); nsIFrame* lastBlockKid = blockFrames.LastChild(); if (lastBlockKid->GetType() != nsGkAtoms::lineFrame) { // No first-line frame at the end of the list, therefore there is // an interveening block between any first-line frame the frames // we are appending. Therefore, we don't need any special // treatment of the appended frames. return rv; } nsIFrame* lineFrame = lastBlockKid; // Find the first and last inline frame in aFrameItems nsIFrame* kid = aFrameItems.childList; nsIFrame* firstInlineFrame = nsnull; nsIFrame* lastInlineFrame = nsnull; while (kid) { if (IsInlineOutside(kid)) { if (!firstInlineFrame) firstInlineFrame = kid; lastInlineFrame = kid; } else { break; } kid = kid->GetNextSibling(); } // If we don't find any inline frames, then there is nothing to do if (!firstInlineFrame) { return rv; } // The inline frames get appended to the lineFrame. Make sure they // are reparented properly. nsIFrame* remainingFrames = lastInlineFrame->GetNextSibling(); lastInlineFrame->SetNextSibling(nsnull); kid = firstInlineFrame; while (kid) { ReparentFrame(aState.mFrameManager, lineFrame, kid); kid = kid->GetNextSibling(); } aState.mFrameManager->AppendFrames(lineFrame, nsnull, firstInlineFrame); // The remaining frames get appended to the block frame if (remainingFrames) { aFrameItems.childList = remainingFrames; } else { aFrameItems.childList = nsnull; aFrameItems.lastChild = nsnull; } return rv; } // Special routine to handle inserting a new frame into a block // frame's child list. Takes care of placing the new frame into the // right place when first-line style is present. nsresult nsCSSFrameConstructor::InsertFirstLineFrames( nsFrameConstructorState& aState, nsIContent* aContent, nsIFrame* aBlockFrame, nsIFrame** aParentFrame, nsIFrame* aPrevSibling, nsFrameItems& aFrameItems) { nsresult rv = NS_OK; // XXXbz If you make this method actually do something, check to make sure // that the caller is passing what you expect. In particular, which content // is aContent? #if 0 nsIFrame* parentFrame = *aParentFrame; nsIFrame* newFrame = aFrameItems.childList; PRBool isInline = IsInlineOutside(newFrame); if (!aPrevSibling) { // Insertion will become the first frame. Two cases: we either // already have a first-line frame or we don't. nsIFrame* firstBlockKid = aBlockFrame->GetFirstChild(nsnull); if (firstBlockKid->GetType() == nsGkAtoms::lineFrame) { // We already have a first-line frame nsIFrame* lineFrame = firstBlockKid; if (isInline) { // Easy case: the new inline frame will go into the lineFrame. ReparentFrame(aState.mFrameManager, lineFrame, newFrame); aState.mFrameManager->InsertFrames(lineFrame, nsnull, nsnull, newFrame); // Since the frame is going into the lineFrame, don't let it // go into the block too. aFrameItems.childList = nsnull; aFrameItems.lastChild = nsnull; } else { // Harder case: We are about to insert a block level element // before the first-line frame. // XXX need a method to steal away frames from the line-frame } } else { // We do not have a first-line frame if (isInline) { // We now need a first-line frame to contain the inline frame. nsIFrame* lineFrame = NS_NewFirstLineFrame(firstLineStyle); if (!lineFrame) { rv = NS_ERROR_OUT_OF_MEMORY; } if (NS_SUCCEEDED(rv)) { // Lookup first-line style context nsStyleContext* parentStyle = nsFrame::CorrectStyleParentFrame(aBlockFrame, nsCSSPseudoElements::firstLine)-> GetStyleContext(); nsRefPtr firstLineStyle = GetFirstLineStyle(aContent, parentStyle); // Initialize the line frame rv = InitAndRestoreFrame(aState, aContent, aBlockFrame, nsnull, lineFrame); // Make sure the caller inserts the lineFrame into the // blocks list of children. aFrameItems.childList = lineFrame; aFrameItems.lastChild = lineFrame; // Give the inline frames to the lineFrame after // reparenting them NS_ASSERTION(lineFrame->GetStyleContext() == firstLineStyle, "Bogus style context on line frame"); ReparentFrame(aPresContext, lineFrame, newFrame); lineFrame->SetInitialChildList(nsnull, newFrame); } } else { // Easy case: the regular insertion logic can insert the new // frame because it's a block frame. } } } else { // Insertion will not be the first frame. nsIFrame* prevSiblingParent = aPrevSibling->GetParent(); if (prevSiblingParent == aBlockFrame) { // Easy case: The prev-siblings parent is the block // frame. Therefore the prev-sibling is not currently in a // line-frame. Therefore the new frame which is going after it, // regardless of type, is not going into a line-frame. } else { // If the prevSiblingParent is not the block-frame then it must // be a line-frame (if it were a letter-frame, that logic would // already have adjusted the prev-sibling to be the // letter-frame). if (isInline) { // Easy case: the insertion can go where the caller thinks it // should go (which is into prevSiblingParent). } else { // Block elements don't end up in line-frames, therefore // change the insertion point to aBlockFrame. However, there // might be more inline elements following aPrevSibling that // need to be pulled out of the line-frame and become children // of the block. nsIFrame* nextSibling = aPrevSibling->GetNextSibling(); nsIFrame* nextLineFrame = prevSiblingParent->GetNextInFlow(); if (nextSibling || nextLineFrame) { // Oy. We have work to do. Create a list of the new frames // that are going into the block by stripping them away from // the line-frame(s). nsFrameList list(nextSibling); if (nextSibling) { nsLineFrame* lineFrame = (nsLineFrame*) prevSiblingParent; lineFrame->StealFramesFrom(nextSibling); } nsLineFrame* nextLineFrame = (nsLineFrame*) lineFrame; for (;;) { nextLineFrame = nextLineFrame->GetNextInFlow(); if (!nextLineFrame) { break; } nsIFrame* kids = nextLineFrame->GetFirstChild(nsnull); } } else { // We got lucky: aPrevSibling was the last inline frame in // the line-frame. ReparentFrame(aState.mFrameManager, aBlockFrame, newFrame); aState.mFrameManager->InsertFrames(aBlockFrame, nsnull, prevSiblingParent, newFrame); aFrameItems.childList = nsnull; aFrameItems.lastChild = nsnull; } } } } #endif return rv; } //---------------------------------------------------------------------- // First-letter support // Determine how many characters in the text fragment apply to the // first letter static PRInt32 FirstLetterCount(const nsTextFragment* aFragment) { PRInt32 count = 0; PRInt32 firstLetterLength = 0; PRBool done = PR_FALSE; PRInt32 i, n = aFragment->GetLength(); for (i = 0; i < n; i++) { PRUnichar ch = aFragment->CharAt(i); if (XP_IS_SPACE(ch)) { if (firstLetterLength) { done = PR_TRUE; break; } count++; continue; } // XXX I18n if ((ch == '\'') || (ch == '\"')) { if (firstLetterLength) { done = PR_TRUE; break; } // keep looping firstLetterLength = 1; } else { count++; done = PR_TRUE; break; } } return count; } static PRBool NeedFirstLetterContinuation(nsIContent* aContent) { NS_PRECONDITION(aContent, "null ptr"); PRBool result = PR_FALSE; if (aContent) { const nsTextFragment* frag = aContent->GetText(); if (frag) { PRInt32 flc = FirstLetterCount(frag); PRInt32 tl = frag->GetLength(); if (flc < tl) { result = PR_TRUE; } } } return result; } static PRBool IsFirstLetterContent(nsIContent* aContent) { return aContent->TextLength() && !aContent->TextIsOnlyWhitespace(); } /** * Create a letter frame, only make it a floating frame. */ void nsCSSFrameConstructor::CreateFloatingLetterFrame( nsFrameConstructorState& aState, nsIFrame* aBlockFrame, nsIContent* aTextContent, nsIFrame* aTextFrame, nsIContent* aBlockContent, nsIFrame* aParentFrame, nsStyleContext* aStyleContext, nsFrameItems& aResult) { // Create the first-letter-frame nsresult rv; nsIFrame* letterFrame; nsStyleSet *styleSet = mPresShell->StyleSet(); letterFrame = NS_NewFirstLetterFrame(mPresShell, aStyleContext); // We don't want to use a text content for a non-text frame (because we want // its primary frame to be a text frame). So use its parent for the // first-letter. nsIContent* letterContent = aTextContent->GetParent(); NS_ASSERTION(letterContent->GetBindingParent() != letterContent, "Reframes of this letter frame will mess with the root of a " "native anonymous content subtree!"); InitAndRestoreFrame(aState, letterContent, aState.GetGeometricParent(aStyleContext->GetStyleDisplay(), aParentFrame), nsnull, letterFrame); // Init the text frame to refer to the letter frame. Make sure we // get a proper style context for it (the one passed in is for the // letter frame and will have the float property set on it; the text // frame shouldn't have that set). nsRefPtr textSC; textSC = styleSet->ResolveStyleForNonElement(aStyleContext); aTextFrame->SetStyleContextWithoutNotification(textSC); InitAndRestoreFrame(aState, aTextContent, letterFrame, nsnull, aTextFrame); // And then give the text frame to the letter frame letterFrame->SetInitialChildList(nsnull, aTextFrame); // See if we will need to continue the text frame (does it contain // more than just the first-letter text or not?) If it does, then we // create (in advance) a continuation frame for it. nsIFrame* nextTextFrame = nsnull; if (NeedFirstLetterContinuation(aTextContent)) { // Create continuation rv = CreateContinuingFrame(aState.mPresContext, aTextFrame, aParentFrame, &nextTextFrame); if (NS_FAILED(rv)) { letterFrame->Destroy(); return; } // Repair the continuations style context nsStyleContext* parentStyleContext = aStyleContext->GetParent(); if (parentStyleContext) { nsRefPtr newSC; newSC = styleSet->ResolveStyleForNonElement(parentStyleContext); if (newSC) { nextTextFrame->SetStyleContext(newSC); } } } NS_ASSERTION(aResult.childList == nsnull, "aResult should be an empty nsFrameItems!"); nsIFrame* insertAfter = nsnull; nsIFrame* f; // Put the new float before any of the floats in the block we're // doing first-letter for, that is, before any floats whose parent is aBlockFrame for (f = aState.mFloatedItems.childList; f; f = f->GetNextSibling()) { if (f->GetParent() == aBlockFrame) break; insertAfter = f; } rv = aState.AddChild(letterFrame, aResult, letterContent, aStyleContext, aParentFrame, PR_FALSE, PR_TRUE, PR_FALSE, PR_TRUE, insertAfter); if (nextTextFrame) { if (NS_FAILED(rv)) { nextTextFrame->Destroy(); } else { aResult.AddChild(nextTextFrame); } } } /** * Create a new letter frame for aTextFrame. The letter frame will be * a child of aParentFrame. */ nsresult nsCSSFrameConstructor::CreateLetterFrame(nsFrameConstructorState& aState, nsIFrame* aBlockFrame, nsIContent* aTextContent, nsIFrame* aParentFrame, nsFrameItems& aResult) { NS_PRECONDITION(aTextContent->IsNodeOfType(nsINode::eTEXT), "aTextContent isn't text"); #ifdef DEBUG { nsBlockFrame* block; NS_ASSERTION(NS_SUCCEEDED(aBlockFrame->QueryInterface(kBlockFrameCID, (void**)&block)) && block, "Not a block frame?"); } #endif // Get style context for the first-letter-frame nsStyleContext* parentStyleContext = nsFrame::CorrectStyleParentFrame(aParentFrame, nsCSSPseudoElements::firstLetter)-> GetStyleContext(); // Use content from containing block so that we can actually // find a matching style rule. nsIContent* blockContent = aState.mFloatedItems.containingBlock->GetContent(); NS_ASSERTION(blockContent == aBlockFrame->GetContent(), "Unexpected block content"); // Create first-letter style rule nsRefPtr sc = GetFirstLetterStyle(blockContent, parentStyleContext); if (sc) { nsRefPtr textSC; textSC = mPresShell->StyleSet()->ResolveStyleForNonElement(sc); // Create a new text frame (the original one will be discarded) // pass a temporary stylecontext, the correct one will be set later nsIFrame* textFrame = NS_NewTextFrame(mPresShell, textSC); // Create the right type of first-letter frame const nsStyleDisplay* display = sc->GetStyleDisplay(); if (display->IsFloating()) { // Make a floating first-letter frame CreateFloatingLetterFrame(aState, aBlockFrame, aTextContent, textFrame, blockContent, aParentFrame, sc, aResult); } else { // Make an inflow first-letter frame nsIFrame* letterFrame = NS_NewFirstLetterFrame(mPresShell, sc); if (letterFrame) { // Initialize the first-letter-frame. We don't want to use a text // content for a non-text frame (because we want its primary frame to // be a text frame). So use its parent for the first-letter. nsIContent* letterContent = aTextContent->GetParent(); NS_ASSERTION(letterContent->GetBindingParent() != letterContent, "Reframes of this letter frame will mess with the root " "of a native anonymous content subtree!"); letterFrame->Init(letterContent, aParentFrame, nsnull); InitAndRestoreFrame(aState, aTextContent, letterFrame, nsnull, textFrame); letterFrame->SetInitialChildList(nsnull, textFrame); aResult.childList = aResult.lastChild = letterFrame; aBlockFrame->AddStateBits(NS_BLOCK_HAS_FIRST_LETTER_CHILD); } } } return NS_OK; } nsresult nsCSSFrameConstructor::WrapFramesInFirstLetterFrame( nsFrameConstructorState& aState, nsIContent* aBlockContent, nsIFrame* aBlockFrame, nsFrameItems& aBlockFrames) { nsresult rv = NS_OK; aBlockFrame->AddStateBits(NS_BLOCK_HAS_FIRST_LETTER_STYLE); nsIFrame* parentFrame = nsnull; nsIFrame* textFrame = nsnull; nsIFrame* prevFrame = nsnull; nsFrameItems letterFrames; PRBool stopLooking = PR_FALSE; rv = WrapFramesInFirstLetterFrame(aState, aBlockFrame, aBlockFrame, aBlockFrames.childList, &parentFrame, &textFrame, &prevFrame, letterFrames, &stopLooking); if (NS_FAILED(rv)) { return rv; } if (parentFrame) { if (parentFrame == aBlockFrame) { // Text textFrame out of the blocks frame list and substitute the // letter frame(s) instead. nsIFrame* nextSibling = textFrame->GetNextSibling(); textFrame->SetNextSibling(nsnull); if (prevFrame) { prevFrame->SetNextSibling(letterFrames.childList); } else { aBlockFrames.childList = letterFrames.childList; } letterFrames.lastChild->SetNextSibling(nextSibling); // Destroy the old textFrame textFrame->Destroy(); // Repair lastChild; the only time this needs to happen is when // the block had one child (the text frame). if (!nextSibling) { aBlockFrames.lastChild = letterFrames.lastChild; } } else { // Take the old textFrame out of the inline parents child list ::DeletingFrameSubtree(aState.mFrameManager, textFrame); parentFrame->RemoveFrame(nsnull, textFrame); // Insert in the letter frame(s) parentFrame->InsertFrames(nsnull, prevFrame, letterFrames.childList); } } return rv; } nsresult nsCSSFrameConstructor::WrapFramesInFirstLetterFrame( nsFrameConstructorState& aState, nsIFrame* aBlockFrame, nsIFrame* aParentFrame, nsIFrame* aParentFrameList, nsIFrame** aModifiedParent, nsIFrame** aTextFrame, nsIFrame** aPrevFrame, nsFrameItems& aLetterFrames, PRBool* aStopLooking) { nsresult rv = NS_OK; nsIFrame* prevFrame = nsnull; nsIFrame* frame = aParentFrameList; while (frame) { nsIFrame* nextFrame = frame->GetNextSibling(); if (nsGkAtoms::textFrame == frame->GetType()) { // Wrap up first-letter content in a letter frame nsIContent* textContent = frame->GetContent(); if (IsFirstLetterContent(textContent)) { // Create letter frame to wrap up the text rv = CreateLetterFrame(aState, aBlockFrame, textContent, aParentFrame, aLetterFrames); if (NS_FAILED(rv)) { return rv; } // Provide adjustment information for parent *aModifiedParent = aParentFrame; *aTextFrame = frame; *aPrevFrame = prevFrame; *aStopLooking = PR_TRUE; return NS_OK; } } else if (IsInlineFrame(frame)) { nsIFrame* kids = frame->GetFirstChild(nsnull); WrapFramesInFirstLetterFrame(aState, aBlockFrame, frame, kids, aModifiedParent, aTextFrame, aPrevFrame, aLetterFrames, aStopLooking); if (*aStopLooking) { return NS_OK; } } else { // This will stop us looking to create more letter frames. For // example, maybe the frame-type is "letterFrame" or // "placeholderFrame". This keeps us from creating extra letter // frames, and also prevents us from creating letter frames when // the first real content child of a block is not text (e.g. an // image, hr, etc.) *aStopLooking = PR_TRUE; break; } prevFrame = frame; frame = nextFrame; } return rv; } nsresult nsCSSFrameConstructor::RemoveFloatingFirstLetterFrames( nsPresContext* aPresContext, nsIPresShell* aPresShell, nsFrameManager* aFrameManager, nsIFrame* aBlockFrame, PRBool* aStopLooking) { // First look for the float frame that is a letter frame nsIFrame* floatFrame = aBlockFrame->GetFirstChild(nsGkAtoms::floatList); while (floatFrame) { // See if we found a floating letter frame if (nsGkAtoms::letterFrame == floatFrame->GetType()) { break; } floatFrame = floatFrame->GetNextSibling(); } if (!floatFrame) { // No such frame return NS_OK; } // Take the text frame away from the letter frame (so it isn't // destroyed when we destroy the letter frame). nsIFrame* textFrame = floatFrame->GetFirstChild(nsnull); if (!textFrame) { return NS_OK; } // Discover the placeholder frame for the letter frame nsIFrame* parentFrame; nsPlaceholderFrame* placeholderFrame = aFrameManager->GetPlaceholderFrameFor(floatFrame); if (!placeholderFrame) { // Somethings really wrong return NS_OK; } parentFrame = placeholderFrame->GetParent(); if (!parentFrame) { // Somethings really wrong return NS_OK; } // Create a new text frame with the right style context that maps // all of the content that was previously part of the letter frame // (and probably continued elsewhere). nsStyleContext* parentSC = parentFrame->GetStyleContext(); if (!parentSC) { return NS_OK; } nsIContent* textContent = textFrame->GetContent(); if (!textContent) { return NS_OK; } nsRefPtr newSC; newSC = aPresShell->StyleSet()->ResolveStyleForNonElement(parentSC); if (!newSC) { return NS_OK; } nsIFrame* newTextFrame = NS_NewTextFrame(aPresShell, newSC); if (NS_UNLIKELY(!newTextFrame)) { return NS_ERROR_OUT_OF_MEMORY;; } newTextFrame->Init(textContent, parentFrame, nsnull); // Destroy the old text frame's continuations (the old text frame // will be destroyed when its letter frame is destroyed). nsIFrame* nextTextFrame = textFrame->GetNextInFlow(); if (nextTextFrame) { nsIFrame* nextTextParent = nextTextFrame->GetParent(); if (nextTextParent) { nsSplittableFrame::BreakFromPrevFlow(nextTextFrame); ::DeletingFrameSubtree(aFrameManager, nextTextFrame); aFrameManager->RemoveFrame(nextTextParent, nsnull, nextTextFrame); } } // First find out where (in the content) the placeholder frames // text is and its previous sibling frame, if any. Note that: // 1) The placeholder had better be in the principal child list of // parentFrame. // 2) It's probably near the beginning (since we're a first-letter frame), // so just doing a linear search for the prevSibling is ok. // 3) Trying to use FindPreviousSibling will fail if the first-letter is in // anonymous content (eg generated content). nsFrameList siblingList(parentFrame->GetFirstChild(nsnull)); NS_ASSERTION(siblingList.ContainsFrame(placeholderFrame), "Placeholder not in parent's principal child list?"); nsIFrame* prevSibling = siblingList.GetPrevSiblingFor(placeholderFrame); // Now that everything is set... #ifdef NOISY_FIRST_LETTER printf("RemoveFloatingFirstLetterFrames: textContent=%p oldTextFrame=%p newTextFrame=%p\n", textContent.get(), textFrame, newTextFrame); #endif UnregisterPlaceholderChain(aFrameManager, placeholderFrame); // Remove the float frame ::DeletingFrameSubtree(aFrameManager, floatFrame); aFrameManager->RemoveFrame(aBlockFrame, nsGkAtoms::floatList, floatFrame); // Remove placeholder frame ::DeletingFrameSubtree(aFrameManager, placeholderFrame); aFrameManager->RemoveFrame(parentFrame, nsnull, placeholderFrame); // Insert text frame in its place aFrameManager->InsertFrames(parentFrame, nsnull, prevSibling, newTextFrame); return NS_OK; } nsresult nsCSSFrameConstructor::RemoveFirstLetterFrames(nsPresContext* aPresContext, nsIPresShell* aPresShell, nsFrameManager* aFrameManager, nsIFrame* aFrame, PRBool* aStopLooking) { nsIFrame* prevSibling = nsnull; nsIFrame* kid = aFrame->GetFirstChild(nsnull); while (kid) { if (nsGkAtoms::letterFrame == kid->GetType()) { // Bingo. Found it. First steal away the text frame. nsIFrame* textFrame = kid->GetFirstChild(nsnull); if (!textFrame) { break; } // Create a new textframe nsStyleContext* parentSC = aFrame->GetStyleContext(); if (!parentSC) { break; } nsIContent* textContent = textFrame->GetContent(); if (!textContent) { break; } nsRefPtr newSC; newSC = aPresShell->StyleSet()->ResolveStyleForNonElement(parentSC); if (!newSC) { break; } textFrame = NS_NewTextFrame(aPresShell, newSC); textFrame->Init(textContent, aFrame, nsnull); // Next rip out the kid and replace it with the text frame ::DeletingFrameSubtree(aFrameManager, kid); aFrameManager->RemoveFrame(aFrame, nsnull, kid); // Insert text frame in its place aFrameManager->InsertFrames(aFrame, nsnull, prevSibling, textFrame); *aStopLooking = PR_TRUE; aFrame->RemoveStateBits(NS_BLOCK_HAS_FIRST_LETTER_CHILD); break; } else if (IsInlineFrame(kid)) { // Look inside child inline frame for the letter frame RemoveFirstLetterFrames(aPresContext, aPresShell, aFrameManager, kid, aStopLooking); if (*aStopLooking) { break; } } prevSibling = kid; kid = kid->GetNextSibling(); } return NS_OK; } nsresult nsCSSFrameConstructor::RemoveLetterFrames(nsPresContext* aPresContext, nsIPresShell* aPresShell, nsFrameManager* aFrameManager, nsIFrame* aBlockFrame) { aBlockFrame = aBlockFrame->GetFirstContinuation(); PRBool stopLooking = PR_FALSE; nsresult rv = RemoveFloatingFirstLetterFrames(aPresContext, aPresShell, aFrameManager, aBlockFrame, &stopLooking); if (NS_SUCCEEDED(rv) && !stopLooking) { rv = RemoveFirstLetterFrames(aPresContext, aPresShell, aFrameManager, aBlockFrame, &stopLooking); } return rv; } // Fixup the letter frame situation for the given block nsresult nsCSSFrameConstructor::RecoverLetterFrames(nsFrameConstructorState& aState, nsIFrame* aBlockFrame) { aBlockFrame = aBlockFrame->GetFirstContinuation(); nsresult rv = NS_OK; aBlockFrame->AddStateBits(NS_BLOCK_HAS_FIRST_LETTER_STYLE); nsIFrame* blockKids = aBlockFrame->GetFirstChild(nsnull); nsIFrame* parentFrame = nsnull; nsIFrame* textFrame = nsnull; nsIFrame* prevFrame = nsnull; nsFrameItems letterFrames; PRBool stopLooking = PR_FALSE; rv = WrapFramesInFirstLetterFrame(aState, aBlockFrame, aBlockFrame, blockKids, &parentFrame, &textFrame, &prevFrame, letterFrames, &stopLooking); if (NS_FAILED(rv)) { return rv; } if (parentFrame) { // Take the old textFrame out of the parents child list ::DeletingFrameSubtree(aState.mFrameManager, textFrame); parentFrame->RemoveFrame(nsnull, textFrame); // Insert in the letter frame(s) parentFrame->InsertFrames(nsnull, prevFrame, letterFrames.childList); } return rv; } //---------------------------------------------------------------------- // listbox Widget Routines nsresult nsCSSFrameConstructor::CreateListBoxContent(nsPresContext* aPresContext, nsIFrame* aParentFrame, nsIFrame* aPrevFrame, nsIContent* aChild, nsIFrame** aNewFrame, PRBool aIsAppend, PRBool aIsScrollbar, nsILayoutHistoryState* aFrameState) { #ifdef MOZ_XUL nsresult rv = NS_OK; // Construct a new frame if (nsnull != aParentFrame) { nsFrameItems frameItems; nsFrameConstructorState state(mPresShell, mFixedContainingBlock, GetAbsoluteContainingBlock(aParentFrame), GetFloatContainingBlock(aParentFrame), mTempFrameTreeState); nsRefPtr styleContext; styleContext = ResolveStyleContext(aParentFrame, aChild); // Pre-check for display "none" - only if we find that, do we create // any frame at all const nsStyleDisplay* display = styleContext->GetStyleDisplay(); if (NS_STYLE_DISPLAY_NONE == display->mDisplay) { *aNewFrame = nsnull; return NS_OK; } BeginUpdate(); rv = ConstructFrameInternal(state, aChild, aParentFrame, aChild->Tag(), aChild->GetNameSpaceID(), styleContext, frameItems, PR_FALSE); if (!state.mPseudoFrames.IsEmpty()) { ProcessPseudoFrames(state, frameItems); } nsIFrame* newFrame = frameItems.childList; *aNewFrame = newFrame; if (NS_SUCCEEDED(rv) && (nsnull != newFrame)) { // Notify the parent frame if (aIsAppend) rv = ((nsListBoxBodyFrame*)aParentFrame)->ListBoxAppendFrames(newFrame); else rv = ((nsListBoxBodyFrame*)aParentFrame)->ListBoxInsertFrames(aPrevFrame, newFrame); } EndUpdate(); } return rv; #else return NS_ERROR_FAILURE; #endif } //---------------------------------------- nsresult nsCSSFrameConstructor::ConstructBlock(nsFrameConstructorState& aState, const nsStyleDisplay* aDisplay, nsIContent* aContent, nsIFrame* aParentFrame, nsIFrame* aContentParentFrame, nsStyleContext* aStyleContext, nsIFrame** aNewFrame, nsFrameItems& aFrameItems, PRBool aAbsPosContainer) { // Create column wrapper if necessary nsIFrame* blockFrame = *aNewFrame; nsIFrame* parent = aParentFrame; nsIFrame* contentParent = aContentParentFrame; nsRefPtr blockStyle = aStyleContext; const nsStyleColumn* columns = aStyleContext->GetStyleColumn(); if (columns->mColumnCount != NS_STYLE_COLUMN_COUNT_AUTO || columns->mColumnWidth.GetUnit() != eStyleUnit_Auto) { nsIFrame* columnSetFrame = nsnull; columnSetFrame = NS_NewColumnSetFrame(mPresShell, aStyleContext, 0); if (!columnSetFrame) { return NS_ERROR_OUT_OF_MEMORY; } InitAndRestoreFrame(aState, aContent, aParentFrame, nsnull, columnSetFrame); // See if we need to create a view, e.g. the frame is absolutely positioned nsHTMLContainerFrame::CreateViewForFrame(columnSetFrame, aContentParentFrame, PR_FALSE); blockStyle = mPresShell->StyleSet()-> ResolvePseudoStyleFor(aContent, nsCSSAnonBoxes::columnContent, aStyleContext); contentParent = columnSetFrame; parent = columnSetFrame; *aNewFrame = columnSetFrame; columnSetFrame->SetInitialChildList(nsnull, blockFrame); } blockFrame->SetStyleContextWithoutNotification(blockStyle); InitAndRestoreFrame(aState, aContent, parent, nsnull, blockFrame); nsresult rv = aState.AddChild(*aNewFrame, aFrameItems, aContent, aStyleContext, aContentParentFrame ? aContentParentFrame : aParentFrame); if (NS_FAILED(rv)) { return rv; } // See if we need to create a view, e.g. the frame is absolutely positioned nsHTMLContainerFrame::CreateViewForFrame(blockFrame, contentParent, PR_FALSE); // We should make the outer frame be the absolute containing block, // if one is required. We have to do this because absolute // positioning must be computed with respect to the CSS dimensions // of the element, which are the dimensions of the outer block. But // we can't really do that because only blocks can have absolute // children. So use the block and try to compensate with hacks // in nsBlockFrame::CalculateContainingBlockSizeForAbsolutes. nsFrameConstructorSaveState absoluteSaveState; if (aAbsPosContainer) { // NS_ASSERTION(aRelPos, "should have made area frame for this"); aState.PushAbsoluteContainingBlock(blockFrame, absoluteSaveState); } // See if the block has first-letter style applied to it... PRBool haveFirstLetterStyle, haveFirstLineStyle; ShouldHaveSpecialBlockStyle(aContent, aStyleContext, &haveFirstLetterStyle, &haveFirstLineStyle); // Process the child content nsFrameItems childItems; nsFrameConstructorSaveState floatSaveState; aState.PushFloatContainingBlock(blockFrame, floatSaveState, haveFirstLetterStyle, haveFirstLineStyle); rv = ProcessChildren(aState, aContent, blockFrame, PR_TRUE, childItems, PR_TRUE); CreateAnonymousFrames(aContent->Tag(), aState, aContent, blockFrame, PR_FALSE, childItems); // Set the frame's initial child list blockFrame->SetInitialChildList(nsnull, childItems.childList); return rv; } static PRBool AreAllKidsInline(nsIFrame* aFrameList) { nsIFrame* kid = aFrameList; while (kid) { if (!IsInlineOutside(kid)) { return PR_FALSE; } kid = kid->GetNextSibling(); } return PR_TRUE; } nsresult nsCSSFrameConstructor::ConstructInline(nsFrameConstructorState& aState, const nsStyleDisplay* aDisplay, nsIContent* aContent, nsIFrame* aParentFrame, nsStyleContext* aStyleContext, PRBool aIsPositioned, nsIFrame* aNewFrame) { // Initialize the frame InitAndRestoreFrame(aState, aContent, aParentFrame, nsnull, aNewFrame); nsFrameConstructorSaveState absoluteSaveState; // definition cannot be inside next block // because the object's destructor is significant // this is part of the fix for bug 42372 // Any inline frame might need a view (because of opacity, or fixed background) // XXXbz should we be passing in a non-null aContentParentFrame? nsHTMLContainerFrame::CreateViewForFrame(aNewFrame, nsnull, PR_FALSE); if (aIsPositioned) { // Relatively positioned frames becomes a container for child // frames that are positioned aState.PushAbsoluteContainingBlock(aNewFrame, absoluteSaveState); } // Process the child content nsFrameItems childItems; PRBool kidsAllInline; nsresult rv = ProcessInlineChildren(aState, aContent, aNewFrame, PR_TRUE, childItems, &kidsAllInline); if (kidsAllInline) { // Set the inline frame's initial child list CreateAnonymousFrames(aContent->Tag(), aState, aContent, aNewFrame, PR_FALSE, childItems); aNewFrame->SetInitialChildList(nsnull, childItems.childList); return rv; } // This inline frame contains several types of children. Therefore // this frame has to be chopped into several pieces. We will produce // as a result of this 3 lists of children. The first list contains // all of the inline children that precede the first block child // (and may be empty). The second list contains all of the block // children and any inlines that are between them (and must not be // empty, otherwise - why are we here?). The final list contains all // of the inline children that follow the final block child. // Find the first block child which defines list1 and list2 nsIFrame* list1 = childItems.childList; nsIFrame* prevToFirstBlock; nsIFrame* list2 = FindFirstBlock(list1, &prevToFirstBlock); if (prevToFirstBlock) { prevToFirstBlock->SetNextSibling(nsnull); } else { list1 = nsnull; } // Find the last block child which defines the end of list2 and the // start of list3 nsIFrame* afterFirstBlock = list2->GetNextSibling(); nsIFrame* list3 = nsnull; nsIFrame* lastBlock = FindLastBlock(afterFirstBlock); if (!lastBlock) { lastBlock = list2; } list3 = lastBlock->GetNextSibling(); lastBlock->SetNextSibling(nsnull); // list1's frames belong to this inline frame so go ahead and take them aNewFrame->SetInitialChildList(nsnull, list1); // list2's frames belong to an anonymous block that we create right // now. The anonymous block will be the parent of the block children // of the inline. nsIAtom* blockStyle; nsRefPtr blockSC; nsIFrame* blockFrame; if (aIsPositioned) { blockStyle = nsCSSAnonBoxes::mozAnonymousPositionedBlock; blockSC = mPresShell->StyleSet()-> ResolvePseudoStyleFor(aContent, blockStyle, aStyleContext); blockFrame = NS_NewRelativeItemWrapperFrame(mPresShell, blockSC, 0); } else { blockStyle = nsCSSAnonBoxes::mozAnonymousBlock; blockSC = mPresShell->StyleSet()-> ResolvePseudoStyleFor(aContent, blockStyle, aStyleContext); blockFrame = NS_NewBlockFrame(mPresShell, blockSC); } InitAndRestoreFrame(aState, aContent, aParentFrame, nsnull, blockFrame, PR_FALSE); // Any inline frame could have a view (e.g., opacity) // XXXbz should we be passing in a non-null aContentParentFrame? nsHTMLContainerFrame::CreateViewForFrame(blockFrame, nsnull, PR_FALSE); if (blockFrame->HasView() || aNewFrame->HasView()) { // Move list2's frames into the new view nsHTMLContainerFrame::ReparentFrameViewList(aState.mPresContext, list2, list2->GetParent(), blockFrame); } blockFrame->SetInitialChildList(nsnull, list2); nsFrameConstructorState state(mPresShell, mFixedContainingBlock, GetAbsoluteContainingBlock(blockFrame), GetFloatContainingBlock(blockFrame)); // If we have an inline between two blocks all inside an inline and the inner // inline contains a float, the float will end up in the float list of the // parent block of the inline, but its parent pointer will be the anonymous // block we create... AdjustFloatParentPtrs() deals with this by moving the // float from the outer state |aState| to the inner |state|. MoveChildrenTo(state.mFrameManager, blockFrame, list2, nsnull, &state, &aState); // list3's frames belong to another inline frame nsIFrame* inlineFrame = nsnull; // If we ever start constructing a second inline in the split even when // list3 is null, the logic in MaybeRecreateContainerForIBSplitterFrame // needs to be adjusted. Also, if you're changing this code also change // AppendFrames(). if (list3) { inlineFrame = MoveFramesToEndOfIBSplit(aState, nsnull, aIsPositioned, aContent, aStyleContext, list3, blockFrame, nsnull); } // Mark the frames as special (note: marking for inlineFrame is handled by // MoveFramesToEndOfIBSplit). That way if any of the append/insert/remove // methods try to fiddle with the children, the containing block will be // reframed instead. SetFrameIsSpecial(aNewFrame, blockFrame); SetFrameIsSpecial(blockFrame, inlineFrame); MarkIBSpecialPrevSibling(blockFrame, aNewFrame); #ifdef DEBUG if (gNoisyInlineConstruction) { nsIFrameDebug* frameDebug; printf("nsCSSFrameConstructor::ConstructInline:\n"); if (NS_SUCCEEDED(CallQueryInterface(aNewFrame, &frameDebug))) { printf(" ==> leading inline frame:\n"); frameDebug->List(stdout, 2); } if (NS_SUCCEEDED(CallQueryInterface(blockFrame, &frameDebug))) { printf(" ==> block frame:\n"); frameDebug->List(stdout, 2); } if (inlineFrame && NS_SUCCEEDED(CallQueryInterface(inlineFrame, &frameDebug))) { printf(" ==> trailing inline frame:\n"); frameDebug->List(stdout, 2); } } #endif return rv; } nsIFrame* nsCSSFrameConstructor::MoveFramesToEndOfIBSplit(nsFrameConstructorState& aState, nsIFrame* aExistingEndFrame, PRBool aIsPositioned, nsIContent* aContent, nsStyleContext* aStyleContext, nsIFrame* aFramesToMove, nsIFrame* aBlockPart, nsFrameConstructorState* aTargetState) { NS_PRECONDITION(aFramesToMove, "Must have frames to move"); NS_PRECONDITION(aBlockPart, "Must have a block part"); nsIFrame* inlineFrame = aExistingEndFrame; if (!inlineFrame) { if (aIsPositioned) { inlineFrame = NS_NewPositionedInlineFrame(mPresShell, aStyleContext); } else { inlineFrame = NS_NewInlineFrame(mPresShell, aStyleContext); } InitAndRestoreFrame(aState, aContent, aBlockPart->GetParent(), nsnull, inlineFrame, PR_FALSE); // Any frame might need a view // XXXbz should we be passing in a non-null aContentParentFrame? nsHTMLContainerFrame::CreateViewForFrame(inlineFrame, nsnull, PR_FALSE); } if (inlineFrame->HasView() || aFramesToMove->GetParent()->HasView()) { // Move list3's frames into the new view nsHTMLContainerFrame::ReparentFrameViewList(aState.mPresContext, aFramesToMove, aFramesToMove->GetParent(), inlineFrame); } // Reparent (cheaply) the frames in list3 nsIFrame* existingFirstChild = inlineFrame->GetFirstChild(nsnull); if (!existingFirstChild && (inlineFrame->GetStateBits() & NS_FRAME_FIRST_REFLOW)) { inlineFrame->SetInitialChildList(nsnull, aFramesToMove); } else { inlineFrame->InsertFrames(nsnull, nsnull, aFramesToMove); } nsFrameConstructorState* startState = aTargetState ? &aState : nsnull; MoveChildrenTo(aState.mFrameManager, inlineFrame, aFramesToMove, existingFirstChild, aTargetState, startState); SetFrameIsSpecial(inlineFrame, nsnull); return inlineFrame; } nsresult nsCSSFrameConstructor::ProcessInlineChildren(nsFrameConstructorState& aState, nsIContent* aContent, nsIFrame* aFrame, PRBool aCanHaveGeneratedContent, nsFrameItems& aFrameItems, PRBool* aKidsAllInline) { nsresult rv = NS_OK; nsStyleContext* styleContext = nsnull; // save the pseudo frame state nsPseudoFrames prevPseudoFrames; aState.mPseudoFrames.Reset(&prevPseudoFrames); if (aCanHaveGeneratedContent) { // Probe for generated content before nsIFrame* generatedFrame; styleContext = aFrame->GetStyleContext(); if (CreateGeneratedContentFrame(aState, aFrame, aContent, styleContext, nsCSSPseudoElements::before, &generatedFrame)) { // Add the generated frame to the child list aFrameItems.AddChild(generatedFrame); } } // Iterate the child content objects and construct frames PRBool allKidsInline = PR_TRUE; ChildIterator iter, last; for (ChildIterator::Init(aContent, &iter, &last); iter != last; ++iter) { // Construct a child frame nsIFrame* oldLastChild = aFrameItems.lastChild; rv = ConstructFrame(aState, nsCOMPtr(*iter), aFrame, aFrameItems); if (NS_FAILED(rv)) { return rv; } // Examine newly added children (we may have added more than one // child if the child was another inline frame that ends up // being carved in 3 pieces) to maintain the allKidsInline flag. if (allKidsInline) { nsIFrame* kid; if (oldLastChild) { kid = oldLastChild->GetNextSibling(); } else { kid = aFrameItems.childList; } while (kid) { if (!IsInlineOutside(kid)) { allKidsInline = PR_FALSE; break; } kid = kid->GetNextSibling(); } } } if (aCanHaveGeneratedContent) { // Probe for generated content after nsIFrame* generatedFrame; if (CreateGeneratedContentFrame(aState, aFrame, aContent, styleContext, nsCSSPseudoElements::after, &generatedFrame)) { // Add the generated frame to the child list aFrameItems.AddChild(generatedFrame); } } // process the current pseudo frame state if (!aState.mPseudoFrames.IsEmpty()) { ProcessPseudoFrames(aState, aFrameItems); // recompute allKidsInline to take into account new child frames // XXX we DON'T do this yet because anonymous table children should // be accepted as inline children, until we turn on inline-table. // See bug 297537. // allKidsInline = AreAllKidsInline(aFrameItems.childList); } // restore the pseudo frame state aState.mPseudoFrames = prevPseudoFrames; *aKidsAllInline = allKidsInline; return rv; } static void DestroyNewlyCreatedFrames(nsFrameConstructorState& aState, nsIFrame* aParentFrame, const nsFrameItems& aFrameList) { // Ok, reverse tracks: wipe out the frames we just created nsFrameManager *frameManager = aState.mFrameManager; // Destroy the frames. As we do make sure any content to frame mappings // or entries in the undisplayed content map are removed frameManager->ClearAllUndisplayedContentIn(aParentFrame->GetContent()); CleanupFrameReferences(frameManager, aFrameList.childList); if (aState.mAbsoluteItems.childList) { CleanupFrameReferences(frameManager, aState.mAbsoluteItems.childList); } if (aState.mFixedItems.childList) { CleanupFrameReferences(frameManager, aState.mFixedItems.childList); } if (aState.mFloatedItems.childList) { CleanupFrameReferences(frameManager, aState.mFloatedItems.childList); } #ifdef MOZ_XUL if (aState.mPopupItems.childList) { CleanupFrameReferences(frameManager, aState.mPopupItems.childList); } #endif nsFrameList tmp(aFrameList.childList); tmp.DestroyFrames(); tmp.SetFrames(aState.mAbsoluteItems.childList); tmp.DestroyFrames(); aState.mAbsoluteItems.childList = nsnull; tmp.SetFrames(aState.mFixedItems.childList); tmp.DestroyFrames(); aState.mFixedItems.childList = nsnull; tmp.SetFrames(aState.mFloatedItems.childList); tmp.DestroyFrames(); aState.mFloatedItems.childList = nsnull; #ifdef MOZ_XUL tmp.SetFrames(aState.mPopupItems.childList); tmp.DestroyFrames(); aState.mPopupItems.childList = nsnull; #endif } PRBool nsCSSFrameConstructor::WipeContainingBlock(nsFrameConstructorState& aState, nsIFrame* aContainingBlock, nsIFrame* aFrame, const nsFrameItems& aFrameList, PRBool aIsAppend, nsIFrame* aPrevSibling) { if (!aFrameList.childList) { return PR_FALSE; } // Before we go and append the frames, we must check for two // special situations. // Situation #1 is a XUL frame that contains frames that are required // to be wrapped in blocks. if (aFrame->IsBoxFrame() && !(aFrame->GetStateBits() & NS_STATE_BOX_WRAPS_KIDS_IN_BLOCK) && AnyKidsNeedBlockParent(aFrameList.childList)) { DestroyNewlyCreatedFrames(aState, aFrame, aFrameList); RecreateFramesForContent(aFrame->GetContent()); return PR_TRUE; } // Situation #2 is an inline frame that will now contain block // frames. This is a no-no and the frame construction logic knows // how to fix this. See defition of IsInlineFrame() for what "an // inline" is. Whether we have "a block" is tested for by // AreAllKidsInline. // We also need to check for an append of content ending in an // inline to the block in an {ib} split or an insert of content // starting with an inline to the start of that block. If that // happens, we also need to reframe, since that content needs to go // into the following or preceding inline in the split. if (IsInlineFrame(aFrame)) { // Nothing to do if all kids are inline if (AreAllKidsInline(aFrameList.childList)) { return PR_FALSE; } } else if (!IsFrameSpecial(aFrame)) { return PR_FALSE; } else { // aFrame is the block in an {ib} split. Check that we're not // messing up either end of it. if (aIsAppend) { // Will be handled in AppendFrames(), unless we have floats that we can't // move out because there might be no float containing block to move them // into. if (!aState.mFloatedItems.childList) { return PR_FALSE; } // Walk up until we get a float containing block that's not part of an // {ib} split, since otherwise we might have to ship floats out of it // too. nsIFrame* floatContainer = aFrame; do { floatContainer = GetFloatContainingBlock(GetIBSplitSpecialPrevSibling(floatContainer)); if (!floatContainer) { break; } if (!IsFrameSpecial(floatContainer)) { return PR_FALSE; } } while (1); } if (aPrevSibling && !aPrevSibling->GetNextSibling()) { // This is an append that won't go through AppendFrames. We can bail out // if the last frame we're appending is not inline if (!aFrameList.lastChild->GetStyleDisplay()->IsInlineOutside()) { return PR_FALSE; } } else { // We can bail out if we're not inserting at the beginning or if // the first frame we're inserting is not inline. if (aPrevSibling || !aFrameList.childList->GetStyleDisplay()->IsInlineOutside()) { return PR_FALSE; } } } DestroyNewlyCreatedFrames(aState, aFrame, aFrameList); // If we don't have a containing block, start with aFrame and look for one. if (!aContainingBlock) { aContainingBlock = aFrame; } // To find the right block to reframe, just walk up the tree until we find a // frame that is: // 1) Not part of an IB split (not special) // 2) Not a pseudo-frame // 3) Not an inline frame // We're guaranteed to find one, since nsStyleContext::ApplyStyleFixups // enforces that the root is display:none, display:table, or display:block. // Note that walking up "too far" is OK in terms of correctness, even if it // might be a little inefficient. This is why we walk out of all // pseudo-frames -- telling which ones are or are not OK to walk out of is // too hard (and I suspect that we do in fact need to walk out of all of // them). while (IsFrameSpecial(aContainingBlock) || IsInlineOutside(aContainingBlock) || aContainingBlock->GetStyleContext()->GetPseudoType()) { aContainingBlock = aContainingBlock->GetParent(); NS_ASSERTION(aContainingBlock, "Must have non-inline, non-special, non-pseudo frame as root " "(or child of root, for a table root)!"); } // Tell parent of the containing block to reformulate the // entire block. This is painful and definitely not optimal // but it will *always* get the right answer. nsIContent *blockContent = aContainingBlock->GetContent(); nsCOMPtr parentContainer = blockContent->GetParent(); #ifdef DEBUG if (gNoisyContentUpdates) { printf("nsCSSFrameConstructor::WipeContainingBlock: blockContent=%p parentContainer=%p\n", static_cast(blockContent), static_cast(parentContainer)); } #endif if (parentContainer) { ReinsertContent(parentContainer, blockContent); } else if (blockContent->GetCurrentDoc() == mDocument) { ReconstructDocElementHierarchyInternal(); } return PR_TRUE; } nsresult nsCSSFrameConstructor::ReframeContainingBlock(nsIFrame* aFrame) { #ifdef DEBUG // ReframeContainingBlock is a NASTY routine, it causes terrible performance problems // so I want to see when it is happening! Unfortunately, it is happening way to often because // so much content on the web causes 'special' block-in-inline frame situations and we handle them // very poorly if (gNoisyContentUpdates) { printf("nsCSSFrameConstructor::ReframeContainingBlock frame=%p\n", static_cast(aFrame)); } #endif PRBool isReflowing; mPresShell->IsReflowLocked(&isReflowing); if(isReflowing) { // don't ReframeContainingBlock, this will result in a crash // if we remove a tree that's in reflow - see bug 121368 for testcase NS_ASSERTION(0, "Atemptted to nsCSSFrameConstructor::ReframeContainingBlock during a Reflow!!!"); return NS_OK; } // Get the first "normal" ancestor of the target frame. nsIFrame* containingBlock = GetIBContainingBlockFor(aFrame); if (containingBlock) { // From here we look for the containing block in case the target // frame is already a block (which can happen when an inline frame // wraps some of its content in an anonymous block; see // ConstructInline) // NOTE: We used to get the FloatContainingBlock here, but it was often wrong. // GetIBContainingBlock works much better and provides the correct container in all cases // so GetFloatContainingBlock(aFrame) has been removed // And get the containingBlock's content nsCOMPtr blockContent = containingBlock->GetContent(); if (blockContent) { // Now find the containingBlock's content's parent nsCOMPtr parentContainer = blockContent->GetParent(); if (parentContainer) { #ifdef DEBUG if (gNoisyContentUpdates) { printf(" ==> blockContent=%p, parentContainer=%p\n", static_cast(blockContent), static_cast(parentContainer)); } #endif return ReinsertContent(parentContainer, blockContent); } } } // If we get here, we're screwed! return ReconstructDocElementHierarchyInternal(); } nsresult nsCSSFrameConstructor::RemoveFixedItems(const nsFrameConstructorState& aState) { nsresult rv=NS_OK; if (mFixedContainingBlock) { nsIFrame *fixedChild = nsnull; do { fixedChild = mFixedContainingBlock->GetFirstChild(nsGkAtoms::fixedList); if (fixedChild) { // Remove the placeholder so it doesn't end up sitting about pointing // to the removed fixed frame. nsPlaceholderFrame *placeholderFrame = aState.mFrameManager->GetPlaceholderFrameFor(fixedChild); NS_ASSERTION(placeholderFrame, "no placeholder for fixed-pos frame"); NS_ASSERTION(placeholderFrame->GetType() == nsGkAtoms::placeholderFrame, "Wrong type"); UnregisterPlaceholderChain(aState.mFrameManager, placeholderFrame); nsIFrame* placeholderParent = placeholderFrame->GetParent(); ::DeletingFrameSubtree(aState.mFrameManager, placeholderFrame); rv = aState.mFrameManager->RemoveFrame(placeholderParent, nsnull, placeholderFrame); if (NS_FAILED(rv)) { NS_WARNING("Error removing placeholder for fixed frame in RemoveFixedItems"); break; } ::DeletingFrameSubtree(aState.mFrameManager, fixedChild); rv = aState.mFrameManager->RemoveFrame(mFixedContainingBlock, nsGkAtoms::fixedList, fixedChild); if (NS_FAILED(rv)) { NS_WARNING("Error removing frame from fixed containing block in RemoveFixedItems"); break; } } } while(fixedChild); } else { NS_WARNING( "RemoveFixedItems called with no FixedContainingBlock data member set"); } return rv; } PR_STATIC_CALLBACK(PLDHashOperator) CollectRestyles(nsISupports* aContent, nsCSSFrameConstructor::RestyleData& aData, void* aRestyleArrayPtr) { nsCSSFrameConstructor::RestyleEnumerateData** restyleArrayPtr = static_cast (aRestyleArrayPtr); nsCSSFrameConstructor::RestyleEnumerateData* currentRestyle = *restyleArrayPtr; currentRestyle->mContent = static_cast(aContent); currentRestyle->mRestyleHint = aData.mRestyleHint; currentRestyle->mChangeHint = aData.mChangeHint; // Increment to the next slot in the array *restyleArrayPtr = currentRestyle + 1; return PL_DHASH_NEXT; } void nsCSSFrameConstructor::ProcessOneRestyle(nsIContent* aContent, nsReStyleHint aRestyleHint, nsChangeHint aChangeHint) { NS_PRECONDITION(aContent, "Must have content node"); if (!aContent->IsInDoc() || aContent->GetCurrentDoc() != mDocument) { // Content node has been removed from our document; nothing else // to do here return; } nsIFrame* primaryFrame = mPresShell->GetPrimaryFrameFor(aContent); if (aRestyleHint & eReStyle_Self) { RestyleElement(aContent, primaryFrame, aChangeHint); } else if (aChangeHint && (primaryFrame || (aChangeHint & nsChangeHint_ReconstructFrame))) { // Don't need to recompute style; just apply the hint nsStyleChangeList changeList; changeList.AppendChange(primaryFrame, aContent, aChangeHint); ProcessRestyledFrames(changeList); } if (aRestyleHint & eReStyle_LaterSiblings) { RestyleLaterSiblings(aContent); } } #define RESTYLE_ARRAY_STACKSIZE 128 void nsCSSFrameConstructor::ProcessPendingRestyles() { PRUint32 count = mPendingRestyles.Count(); if (!count) { // Nothing to do return; } NS_PRECONDITION(mDocument, "No document? Pshaw!\n"); // Use the stack if we can, otherwise fall back on heap-allocation. nsAutoTArray restyleArr; RestyleEnumerateData* restylesToProcess = restyleArr.AppendElements(count); if (!restylesToProcess) { return; } RestyleEnumerateData* lastRestyle = restylesToProcess; mPendingRestyles.Enumerate(CollectRestyles, &lastRestyle); NS_ASSERTION(lastRestyle - restylesToProcess == PRInt32(count), "Enumeration screwed up somehow"); // Clear the hashtable so we don't end up trying to process a restyle we're // already processing, sending us into an infinite loop. mPendingRestyles.Clear(); // Make sure to not rebuild quote or counter lists while we're // processing restyles BeginUpdate(); for (RestyleEnumerateData* currentRestyle = restylesToProcess; currentRestyle != lastRestyle; ++currentRestyle) { ProcessOneRestyle(currentRestyle->mContent, currentRestyle->mRestyleHint, currentRestyle->mChangeHint); } EndUpdate(); #ifdef DEBUG mPresShell->VerifyStyleTree(); #endif } void nsCSSFrameConstructor::PostRestyleEvent(nsIContent* aContent, nsReStyleHint aRestyleHint, nsChangeHint aMinChangeHint) { if (aRestyleHint == 0 && !aMinChangeHint) { // Nothing to do here return; } NS_ASSERTION(aContent->IsNodeOfType(nsINode::eELEMENT), "Shouldn't be trying to restyle non-elements directly"); RestyleData existingData; existingData.mRestyleHint = nsReStyleHint(0); existingData.mChangeHint = NS_STYLE_HINT_NONE; mPendingRestyles.Get(aContent, &existingData); existingData.mRestyleHint = nsReStyleHint(existingData.mRestyleHint | aRestyleHint); NS_UpdateHint(existingData.mChangeHint, aMinChangeHint); mPendingRestyles.Put(aContent, existingData); if (!mRestyleEvent.IsPending()) { nsRefPtr ev = new RestyleEvent(this); if (NS_FAILED(NS_DispatchToCurrentThread(ev))) { NS_WARNING("failed to dispatch restyle event"); // XXXbz and what? } else { mRestyleEvent = ev; } } } NS_IMETHODIMP nsCSSFrameConstructor::RestyleEvent::Run() { if (!mConstructor) return NS_OK; // event was revoked // Make sure that any restyles that happen from now on will go into // a new event. mConstructor->mRestyleEvent.Forget(); return mConstructor->mPresShell->FlushPendingNotifications(Flush_Style); } NS_IMETHODIMP nsCSSFrameConstructor::LazyGenerateChildrenEvent::Run() { mPresShell->GetDocument()->FlushPendingNotifications(Flush_Layout); // this is hard-coded to handle only menu popup frames nsIFrame* frame = mPresShell->GetPrimaryFrameFor(mContent); if (frame && frame->GetType() == nsGkAtoms::menuPopupFrame) { #ifdef MOZ_XUL // it is possible that the frame is different than the one that requested // the lazy generation, but as long as it's a popup frame that hasn't // generated its children yet, that's OK. nsMenuPopupFrame* menuPopupFrame = static_cast(frame); if (menuPopupFrame->HasGeneratedChildren()) { if (mCallback) mCallback(mContent, frame, mArg); return NS_OK; } // indicate that the children have been generated menuPopupFrame->SetGeneratedChildren(); #endif nsCSSFrameConstructor* fc = mPresShell->FrameConstructor(); fc->BeginUpdate(); nsFrameItems childItems; nsFrameConstructorState state(mPresShell, nsnull, nsnull, nsnull); nsresult rv = fc->ProcessChildren(state, mContent, frame, PR_FALSE, childItems, PR_FALSE); if (NS_FAILED(rv)) return rv; fc->CreateAnonymousFrames(mContent->Tag(), state, mContent, frame, PR_FALSE, childItems); frame->SetInitialChildList(nsnull, childItems.childList); fc->EndUpdate(); if (mCallback) mCallback(mContent, frame, mArg); // call XBL constructors after the frames are created mPresShell->GetDocument()->BindingManager()->ProcessAttachedQueue(); } return NS_OK; }