/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 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): * Pierre Phaneuf * * 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 ***** */ /* base class #1 for rendering objects that have child lists */ #include "nsContainerFrame.h" #include "nsIContent.h" #include "nsIDocument.h" #include "nsPresContext.h" #include "nsIRenderingContext.h" #include "nsStyleContext.h" #include "nsRect.h" #include "nsPoint.h" #include "nsGUIEvent.h" #include "nsStyleConsts.h" #include "nsIView.h" #include "nsHTMLContainerFrame.h" #include "nsFrameManager.h" #include "nsIPresShell.h" #include "nsCOMPtr.h" #include "nsGkAtoms.h" #include "nsCSSAnonBoxes.h" #include "nsIViewManager.h" #include "nsIWidget.h" #include "nsGfxCIID.h" #include "nsIServiceManager.h" #include "nsCSSRendering.h" #include "nsTransform2D.h" #include "nsRegion.h" #include "nsLayoutErrors.h" #include "nsDisplayList.h" #include "nsContentErrors.h" #include "nsIEventStateManager.h" #ifdef NS_DEBUG #undef NOISY #else #undef NOISY #endif nsContainerFrame::~nsContainerFrame() { } NS_IMETHODIMP nsContainerFrame::Init(nsIContent* aContent, nsIFrame* aParent, nsIFrame* aPrevInFlow) { nsresult rv = nsSplittableFrame::Init(aContent, aParent, aPrevInFlow); if (aPrevInFlow) { // Make sure we copy bits from our prev-in-flow that will affect // us. A continuation for a container frame needs to know if it // has a child with a view so that we'll properly reposition it. if (aPrevInFlow->GetStateBits() & NS_FRAME_HAS_CHILD_WITH_VIEW) AddStateBits(NS_FRAME_HAS_CHILD_WITH_VIEW); } return rv; } NS_IMETHODIMP nsContainerFrame::SetInitialChildList(nsIAtom* aListName, nsIFrame* aChildList) { nsresult result; if (!mFrames.IsEmpty()) { // We already have child frames which means we've already been // initialized NS_NOTREACHED("unexpected second call to SetInitialChildList"); result = NS_ERROR_UNEXPECTED; } else if (aListName) { // All we know about is the unnamed principal child list NS_NOTREACHED("unknown frame list"); result = NS_ERROR_INVALID_ARG; } else { #ifdef NS_DEBUG nsFrame::VerifyDirtyBitSet(aChildList); #endif mFrames.SetFrames(aChildList); result = NS_OK; } return result; } NS_IMETHODIMP nsContainerFrame::AppendFrames(nsIAtom* aListName, nsIFrame* aFrameList) { if (nsnull != aListName) { #ifdef IBMBIDI if (aListName != nsGkAtoms::nextBidi) #endif { NS_ERROR("unexpected child list"); return NS_ERROR_INVALID_ARG; } } if (aFrameList) { mFrames.AppendFrames(this, aFrameList); // Ask the parent frame to reflow me. #ifdef IBMBIDI if (nsnull == aListName) #endif { PresContext()->PresShell()-> FrameNeedsReflow(this, nsIPresShell::eTreeChange, NS_FRAME_IS_DIRTY); } } return NS_OK; } NS_IMETHODIMP nsContainerFrame::InsertFrames(nsIAtom* aListName, nsIFrame* aPrevFrame, nsIFrame* aFrameList) { NS_ASSERTION(!aPrevFrame || aPrevFrame->GetParent() == this, "inserting after sibling frame with different parent"); if (nsnull != aListName) { #ifdef IBMBIDI if (aListName != nsGkAtoms::nextBidi) #endif { NS_ERROR("unexpected child list"); return NS_ERROR_INVALID_ARG; } } if (aFrameList) { // Insert frames after aPrevFrame mFrames.InsertFrames(this, aPrevFrame, aFrameList); #ifdef IBMBIDI if (nsnull == aListName) #endif { PresContext()->PresShell()-> FrameNeedsReflow(this, nsIPresShell::eTreeChange, NS_FRAME_IS_DIRTY); } } return NS_OK; } NS_IMETHODIMP nsContainerFrame::RemoveFrame(nsIAtom* aListName, nsIFrame* aOldFrame) { if (nsnull != aListName) { #ifdef IBMBIDI if (nsGkAtoms::nextBidi != aListName) #endif { NS_ERROR("unexpected child list"); return NS_ERROR_INVALID_ARG; } } if (aOldFrame) { // Loop and destroy the frame and all of its continuations. // If the frame we are removing is a brFrame, we need a reflow so // the line the brFrame was on can attempt to pull up any frames // that can fit from lines below it. PRBool generateReflowCommand = aOldFrame->GetType() == nsGkAtoms::brFrame; nsContainerFrame* parent = NS_STATIC_CAST(nsContainerFrame*, aOldFrame->GetParent()); while (aOldFrame) { #ifdef IBMBIDI if (nsGkAtoms::nextBidi != aListName) { #endif // If the frame being removed has zero size then don't bother // generating a reflow command, otherwise make sure we do. nsRect bbox = aOldFrame->GetRect(); if (bbox.width || bbox.height) { generateReflowCommand = PR_TRUE; } #ifdef IBMBIDI } #endif // When the parent is an inline frame we have a simple task - just // remove the frame from its parents list and generate a reflow // command. nsIFrame* oldFrameNextContinuation = aOldFrame->GetNextContinuation(); parent->mFrames.DestroyFrame(aOldFrame); aOldFrame = oldFrameNextContinuation; if (aOldFrame) { parent = NS_STATIC_CAST(nsContainerFrame*, aOldFrame->GetParent()); } } if (generateReflowCommand) { PresContext()->PresShell()-> FrameNeedsReflow(this, nsIPresShell::eTreeChange, NS_FRAME_IS_DIRTY); } } return NS_OK; } void nsContainerFrame::CleanupGeneratedContentIn(nsIContent* aRealContent, nsIFrame* aRoot) { nsIAtom* frameList = nsnull; PRInt32 listIndex = 0; do { nsIFrame* child = aRoot->GetFirstChild(frameList); while (child) { nsIContent* content = child->GetContent(); if (content && content != aRealContent) { // Tell the ESM that this content is going away now, so it'll update // its hover content, etc. aRoot->PresContext()->EventStateManager()->ContentRemoved(content); content->UnbindFromTree(); } CleanupGeneratedContentIn(aRealContent, child); child = child->GetNextSibling(); } frameList = aRoot->GetAdditionalChildListName(listIndex++); } while (frameList); } void nsContainerFrame::Destroy() { // Prevent event dispatch during destruction if (HasView()) { GetView()->SetClientData(nsnull); } // Delete the primary child list mFrames.DestroyFrames(); // Destroy overflow frames now nsFrameList overflowFrames(GetOverflowFrames(PresContext(), PR_TRUE)); overflowFrames.DestroyFrames(); // Destroy the frame and remove the flow pointers nsSplittableFrame::Destroy(); } ///////////////////////////////////////////////////////////////////////////// // Child frame enumeration nsIFrame* nsContainerFrame::GetFirstChild(nsIAtom* aListName) const { // We only know about the unnamed principal child list and the overflow // list if (nsnull == aListName) { return mFrames.FirstChild(); } else if (nsGkAtoms::overflowList == aListName) { return GetOverflowFrames(PresContext(), PR_FALSE); } else { return nsnull; } } nsIAtom* nsContainerFrame::GetAdditionalChildListName(PRInt32 aIndex) const { if (aIndex == 0) { return nsGkAtoms::overflowList; } else { return nsnull; } } ///////////////////////////////////////////////////////////////////////////// // Painting/Events NS_IMETHODIMP nsContainerFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder, const nsRect& aDirtyRect, const nsDisplayListSet& aLists) { nsresult rv = DisplayBorderBackgroundOutline(aBuilder, aLists); NS_ENSURE_SUCCESS(rv, rv); return BuildDisplayListForNonBlockChildren(aBuilder, aDirtyRect, aLists); } nsresult nsContainerFrame::BuildDisplayListForNonBlockChildren(nsDisplayListBuilder* aBuilder, const nsRect& aDirtyRect, const nsDisplayListSet& aLists, PRUint32 aFlags) { nsIFrame* kid = mFrames.FirstChild(); // Put each child's background directly onto the content list nsDisplayListSet set(aLists, aLists.Content()); // The children should be in content order while (kid) { nsresult rv = BuildDisplayListForChild(aBuilder, kid, aDirtyRect, set, aFlags); NS_ENSURE_SUCCESS(rv, rv); kid = kid->GetNextSibling(); } return NS_OK; } /* virtual */ void nsContainerFrame::ChildIsDirty(nsIFrame* aChild) { AddStateBits(NS_FRAME_HAS_DIRTY_CHILDREN); } PRBool nsContainerFrame::IsLeaf() const { return PR_FALSE; } PRBool nsContainerFrame::PeekOffsetNoAmount(PRBool aForward, PRInt32* aOffset) { NS_ASSERTION (aOffset && *aOffset <= 1, "aOffset out of range"); // Don't allow the caret to stay in an empty (leaf) container frame. return PR_FALSE; } PRBool nsContainerFrame::PeekOffsetCharacter(PRBool aForward, PRInt32* aOffset) { NS_ASSERTION (aOffset && *aOffset <= 1, "aOffset out of range"); // Don't allow the caret to stay in an empty (leaf) container frame. return PR_FALSE; } ///////////////////////////////////////////////////////////////////////////// // Helper member functions /** * Position the view associated with |aKidFrame|, if there is one. A * container frame should call this method after positioning a frame, * but before |Reflow|. */ void nsContainerFrame::PositionFrameView(nsIFrame* aKidFrame) { nsIFrame* parentFrame = aKidFrame->GetParent(); if (!aKidFrame->HasView() || !parentFrame) return; nsIView* view = aKidFrame->GetView(); nsIViewManager* vm = view->GetViewManager(); nsPoint pt; nsIView* ancestorView = parentFrame->GetClosestView(&pt); if (ancestorView != view->GetParent()) { NS_ASSERTION(ancestorView == view->GetParent()->GetParent(), "Allowed only one anonymous view between frames"); // parentFrame is responsible for positioning aKidFrame's view // explicitly return; } pt += aKidFrame->GetPosition(); vm->MoveViewTo(view, pt.x, pt.y); } static void SyncFrameViewGeometryDependentProperties(nsPresContext* aPresContext, nsIFrame* aFrame, nsStyleContext* aStyleContext, nsIView* aView, PRUint32 aFlags) { nsIViewManager* vm = aView->GetViewManager(); PRBool isCanvas; const nsStyleBackground* bg; PRBool hasBG = nsCSSRendering::FindBackground(aPresContext, aFrame, &bg, &isCanvas); if (isCanvas) { nsIView* rootView; vm->GetRootView(rootView); nsIView* rootParent = rootView->GetParent(); nsIDocument *doc = aPresContext->PresShell()->GetDocument(); if (doc) { nsIContent *rootElem = doc->GetRootContent(); if (!doc->GetParentDocument() && (nsCOMPtr(doc->GetContainer())) && rootElem && rootElem->IsNodeOfType(nsINode::eXUL)) { // we're XUL at the root of the document hierarchy. Try to make our // window translucent. // don't proceed unless this is the root view // (sometimes the non-root-view is a canvas) if (aView->HasWidget() && aView == rootView) { aView->GetWidget()->SetWindowTranslucency(nsLayoutUtils::FrameHasTransparency(aFrame)); } } } } } void nsContainerFrame::SyncFrameViewAfterReflow(nsPresContext* aPresContext, nsIFrame* aFrame, nsIView* aView, const nsRect* aCombinedArea, PRUint32 aFlags) { if (!aView) { return; } NS_ASSERTION(aCombinedArea, "Combined area must be passed in now"); // Make sure the view is sized and positioned correctly if (0 == (aFlags & NS_FRAME_NO_MOVE_VIEW)) { PositionFrameView(aFrame); } if (0 == (aFlags & NS_FRAME_NO_SIZE_VIEW)) { nsIViewManager* vm = aView->GetViewManager(); vm->ResizeView(aView, *aCombinedArea, PR_TRUE); // Even if the size hasn't changed, we need to sync up the // geometry dependent properties, because (kidState & // NS_FRAME_OUTSIDE_CHILDREN) might have changed, and we can't // detect whether it has or not. Likewise, whether the view size // has changed or not, we may need to change the transparency // state even if there is no clip. nsStyleContext* savedStyleContext = aFrame->GetStyleContext(); SyncFrameViewGeometryDependentProperties(aPresContext, aFrame, savedStyleContext, aView, aFlags); } } void nsContainerFrame::SyncFrameViewProperties(nsPresContext* aPresContext, nsIFrame* aFrame, nsStyleContext* aStyleContext, nsIView* aView, PRUint32 aFlags) { NS_ASSERTION(!aStyleContext || aFrame->GetStyleContext() == aStyleContext, "Wrong style context for frame?"); if (!aView) { return; } nsIViewManager* vm = aView->GetViewManager(); if (nsnull == aStyleContext) { aStyleContext = aFrame->GetStyleContext(); } // Make sure visibility is correct if (0 == (aFlags & NS_FRAME_NO_VISIBILITY)) { // See if the view should be hidden or visible PRBool viewIsVisible = PR_TRUE; if (!aStyleContext->GetStyleVisibility()->IsVisible() && !aFrame->SupportsVisibilityHidden()) { // If it's a scrollable frame that can't hide its scrollbars, // hide the view. This means that child elements can't override // their parent's visibility, but it's not practical to leave it // visible in all cases because the scrollbars will be showing // XXXldb Does the view system really enforce this correctly? viewIsVisible = PR_FALSE; } else { // if the view is for a popup, don't show the view if the popup is closed nsIWidget* widget = aView->GetWidget(); if (widget) { nsWindowType windowType; widget->GetWindowType(windowType); if (windowType == eWindowType_popup) { widget->IsVisible(viewIsVisible); } } } vm->SetViewVisibility(aView, viewIsVisible ? nsViewVisibility_kShow : nsViewVisibility_kHide); } // See if the frame is being relatively positioned or absolutely // positioned PRBool isPositioned = aStyleContext->GetStyleDisplay()->IsPositioned(); PRInt32 zIndex = 0; PRBool autoZIndex = PR_FALSE; if (!isPositioned) { autoZIndex = PR_TRUE; } else { // Make sure z-index is correct const nsStylePosition* position = aStyleContext->GetStylePosition(); if (position->mZIndex.GetUnit() == eStyleUnit_Integer) { zIndex = position->mZIndex.GetIntValue(); } else if (position->mZIndex.GetUnit() == eStyleUnit_Auto) { autoZIndex = PR_TRUE; } } vm->SetViewZIndex(aView, autoZIndex, zIndex, isPositioned); SyncFrameViewGeometryDependentProperties(aPresContext, aFrame, aStyleContext, aView, aFlags); } PRBool nsContainerFrame::FrameNeedsView(nsIFrame* aFrame) { // XXX Check needed because frame construction can't properly figure out when // a frame is the child of a scrollframe if (aFrame->GetStyleContext()->GetPseudoType() == nsCSSAnonBoxes::scrolledContent) { return PR_TRUE; } return aFrame->NeedsView(); } static nscoord GetCoord(const nsStyleCoord& aCoord, nscoord aIfNotCoord) { return aCoord.GetUnit() == eStyleUnit_Coord ? aCoord.GetCoordValue() : aIfNotCoord; } void nsContainerFrame::DoInlineIntrinsicWidth(nsIRenderingContext *aRenderingContext, InlineIntrinsicWidthData *aData, nsLayoutUtils::IntrinsicWidthType aType) { if (GetPrevInFlow()) return; // Already added. NS_PRECONDITION(aType == nsLayoutUtils::MIN_WIDTH || aType == nsLayoutUtils::PREF_WIDTH, "bad type"); PRUint8 startSide, endSide; if (GetStyleVisibility()->mDirection == NS_STYLE_DIRECTION_LTR) { startSide = NS_SIDE_LEFT; endSide = NS_SIDE_RIGHT; } else { startSide = NS_SIDE_RIGHT; endSide = NS_SIDE_LEFT; } const nsStylePadding *stylePadding = GetStylePadding(); const nsStyleBorder *styleBorder = GetStyleBorder(); const nsStyleMargin *styleMargin = GetStyleMargin(); nsStyleCoord tmp; // This goes at the beginning no matter how things are broken and how // messy the bidi situations are, since per CSS2.1 section 8.6 // (implemented in bug 328168), the startSide border is always on the // first line. aData->currentLine += GetCoord(stylePadding->mPadding.Get(startSide, tmp), 0) + styleBorder->GetBorderWidth(startSide) + GetCoord(styleMargin->mMargin.Get(startSide, tmp), 0); for (nsContainerFrame *nif = this; nif; nif = (nsContainerFrame*) nif->GetNextInFlow()) { for (nsIFrame *kid = nif->mFrames.FirstChild(); kid; kid = kid->GetNextSibling()) { if (aType == nsLayoutUtils::MIN_WIDTH) kid->AddInlineMinWidth(aRenderingContext, NS_STATIC_CAST(InlineMinWidthData*, aData)); else kid->AddInlinePrefWidth(aRenderingContext, NS_STATIC_CAST(InlinePrefWidthData*, aData)); } } // This goes at the end no matter how things are broken and how // messy the bidi situations are, since per CSS2.1 section 8.6 // (implemented in bug 328168), the endSide border is always on the // last line. aData->currentLine += GetCoord(stylePadding->mPadding.Get(endSide, tmp), 0) + styleBorder->GetBorderWidth(endSide) + GetCoord(styleMargin->mMargin.Get(endSide, tmp), 0); } /* virtual */ nsSize nsContainerFrame::ComputeAutoSize(nsIRenderingContext *aRenderingContext, nsSize aCBSize, nscoord aAvailableWidth, nsSize aMargin, nsSize aBorder, nsSize aPadding, PRBool aShrinkWrap) { nsSize result(0xdeadbeef, NS_UNCONSTRAINEDSIZE); nscoord availBased = aAvailableWidth - aMargin.width - aBorder.width - aPadding.width; // replaced elements always shrink-wrap if (aShrinkWrap || IsFrameOfType(eReplaced)) { // don't bother setting it if the result won't be used if (GetStylePosition()->mWidth.GetUnit() == eStyleUnit_Auto) { result.width = ShrinkWidthToFit(aRenderingContext, availBased); } } else { result.width = availBased; } return result; } /** * Invokes the WillReflow() function, positions the frame and its view (if * requested), and then calls Reflow(). If the reflow succeeds and the child * frame is complete, deletes any next-in-flows using DeleteNextInFlowChild() */ nsresult nsContainerFrame::ReflowChild(nsIFrame* aKidFrame, nsPresContext* aPresContext, nsHTMLReflowMetrics& aDesiredSize, const nsHTMLReflowState& aReflowState, nscoord aX, nscoord aY, PRUint32 aFlags, nsReflowStatus& aStatus) { NS_PRECONDITION(aReflowState.frame == aKidFrame, "bad reflow state"); nsresult result; // Send the WillReflow() notification, and position the child frame // and its view if requested aKidFrame->WillReflow(aPresContext); if (0 == (aFlags & NS_FRAME_NO_MOVE_FRAME)) { aKidFrame->SetPosition(nsPoint(aX, aY)); } if (0 == (aFlags & NS_FRAME_NO_MOVE_VIEW)) { PositionFrameView(aKidFrame); } // Reflow the child frame result = aKidFrame->Reflow(aPresContext, aDesiredSize, aReflowState, aStatus); // If the reflow was successful and the child frame is complete, delete any // next-in-flows if (NS_SUCCEEDED(result) && NS_FRAME_IS_COMPLETE(aStatus)) { nsIFrame* kidNextInFlow = aKidFrame->GetNextInFlow(); if (nsnull != kidNextInFlow) { // Remove all of the childs next-in-flows. Make sure that we ask // the right parent to do the removal (it's possible that the // parent is not this because we are executing pullup code) NS_STATIC_CAST(nsContainerFrame*, kidNextInFlow->GetParent()) ->DeleteNextInFlowChild(aPresContext, kidNextInFlow); } } return result; } /** * Position the views of |aFrame|'s descendants. A container frame * should call this method if it moves a frame after |Reflow|. */ void nsContainerFrame::PositionChildViews(nsIFrame* aFrame) { if (!(aFrame->GetStateBits() & NS_FRAME_HAS_CHILD_WITH_VIEW)) { return; } nsIAtom* childListName = nsnull; PRInt32 childListIndex = 0; do { // Recursively walk aFrame's child frames nsIFrame* childFrame = aFrame->GetFirstChild(childListName); while (childFrame) { // Position the frame's view (if it has one) otherwise recursively // process its children if (childFrame->HasView()) { PositionFrameView(childFrame); } else { PositionChildViews(childFrame); } // Get the next sibling child frame childFrame = childFrame->GetNextSibling(); } childListName = aFrame->GetAdditionalChildListName(childListIndex++); } while (childListName); } /** * The second half of frame reflow. Does the following: * - sets the frame's bounds * - sizes and positions (if requested) the frame's view. If the frame's final * position differs from the current position and the frame itself does not * have a view, then any child frames with views are positioned so they stay * in sync * - sets the view's visibility, opacity, content transparency, and clip * - invoked the DidReflow() function * * Flags: * NS_FRAME_NO_MOVE_FRAME - don't move the frame. aX and aY are ignored in this * case. Also implies NS_FRAME_NO_MOVE_VIEW * NS_FRAME_NO_MOVE_VIEW - don't position the frame's view. Set this if you * don't want to automatically sync the frame and view * NS_FRAME_NO_SIZE_VIEW - don't size the frame's view */ nsresult nsContainerFrame::FinishReflowChild(nsIFrame* aKidFrame, nsPresContext* aPresContext, const nsHTMLReflowState* aReflowState, nsHTMLReflowMetrics& aDesiredSize, nscoord aX, nscoord aY, PRUint32 aFlags) { nsPoint curOrigin = aKidFrame->GetPosition(); nsRect bounds(aX, aY, aDesiredSize.width, aDesiredSize.height); aKidFrame->SetRect(bounds); if (aKidFrame->HasView()) { nsIView* view = aKidFrame->GetView(); // Make sure the frame's view is properly sized and positioned and has // things like opacity correct SyncFrameViewAfterReflow(aPresContext, aKidFrame, view, &aDesiredSize.mOverflowArea, aFlags); } if (!(aFlags & NS_FRAME_NO_MOVE_VIEW) && (curOrigin.x != aX || curOrigin.y != aY)) { if (!aKidFrame->HasView()) { // If the frame has moved, then we need to make sure any child views are // correctly positioned PositionChildViews(aKidFrame); } // We also need to redraw everything associated with the frame // because if the frame's Reflow issued any invalidates, then they // will be at the wrong offset ... note that this includes // invalidates issued against the frame's children, so we need to // invalidate the overflow area too. aKidFrame->Invalidate(aDesiredSize.mOverflowArea); } return aKidFrame->DidReflow(aPresContext, aReflowState, NS_FRAME_REFLOW_FINISHED); } /** * Remove and delete aNextInFlow and its next-in-flows. Updates the sibling and flow * pointers */ void nsContainerFrame::DeleteNextInFlowChild(nsPresContext* aPresContext, nsIFrame* aNextInFlow) { nsIFrame* prevInFlow = aNextInFlow->GetPrevInFlow(); NS_PRECONDITION(prevInFlow, "bad prev-in-flow"); // If the next-in-flow has a next-in-flow then delete it, too (and // delete it first). // Do this in a loop so we don't overflow the stack for frames // with very many next-in-flows nsIFrame* nextNextInFlow = aNextInFlow->GetNextInFlow(); if (nextNextInFlow) { nsAutoVoidArray frames; for (nsIFrame* f = nextNextInFlow; f; f = f->GetNextInFlow()) { frames.AppendElement(f); } for (PRInt32 i = frames.Count() - 1; i >= 0; --i) { nsIFrame* delFrame = NS_STATIC_CAST(nsIFrame*, frames.ElementAt(i)); NS_STATIC_CAST(nsContainerFrame*, delFrame->GetParent()) ->DeleteNextInFlowChild(aPresContext, delFrame); } } // Disconnect the next-in-flow from the flow list nsSplittableFrame::BreakFromPrevFlow(aNextInFlow); // Take the next-in-flow out of the parent's child list PRBool result = mFrames.RemoveFrame(aNextInFlow); if (!result) { // We didn't find the child in the parent's principal child list. // Maybe it's on the overflow list? nsFrameList overflowFrames(GetOverflowFrames(aPresContext, PR_TRUE)); if (overflowFrames.IsEmpty() || !overflowFrames.RemoveFrame(aNextInFlow)) { NS_ASSERTION(result, "failed to remove frame"); } // Set the overflow property again if (overflowFrames.NotEmpty()) { SetOverflowFrames(aPresContext, overflowFrames.FirstChild()); } } // Delete the next-in-flow frame and its descendants. aNextInFlow->Destroy(); NS_POSTCONDITION(!prevInFlow->GetNextInFlow(), "non null next-in-flow"); } nsIFrame* nsContainerFrame::GetOverflowFrames(nsPresContext* aPresContext, PRBool aRemoveProperty) const { nsPropertyTable *propTable = aPresContext->PropertyTable(); if (aRemoveProperty) { return (nsIFrame*) propTable->UnsetProperty(this, nsGkAtoms::overflowProperty); } return (nsIFrame*) propTable->GetProperty(this, nsGkAtoms::overflowProperty); } // Destructor function for the overflow frame property static void DestroyOverflowFrames(void* aFrame, nsIAtom* aPropertyName, void* aPropertyValue, void* aDtorData) { if (aPropertyValue) { nsFrameList frames((nsIFrame*)aPropertyValue); frames.DestroyFrames(); } } nsresult nsContainerFrame::SetOverflowFrames(nsPresContext* aPresContext, nsIFrame* aOverflowFrames) { nsresult rv = aPresContext->PropertyTable()->SetProperty(this, nsGkAtoms::overflowProperty, aOverflowFrames, DestroyOverflowFrames, nsnull); // Verify that we didn't overwrite an existing overflow list NS_ASSERTION(rv != NS_PROPTABLE_PROP_OVERWRITTEN, "existing overflow list"); return rv; } /** * Push aFromChild and its next siblings to the next-in-flow. Change the * geometric parent of each frame that's pushed. If there is no next-in-flow * the frames are placed on the overflow list (and the geometric parent is * left unchanged). * * Updates the next-in-flow's child count. Does not update the * pusher's child count. * * @param aFromChild the first child frame to push. It is disconnected from * aPrevSibling * @param aPrevSibling aFromChild's previous sibling. Must not be null. It's * an error to push a parent's first child frame */ void nsContainerFrame::PushChildren(nsPresContext* aPresContext, nsIFrame* aFromChild, nsIFrame* aPrevSibling) { NS_PRECONDITION(nsnull != aFromChild, "null pointer"); NS_PRECONDITION(nsnull != aPrevSibling, "pushing first child"); NS_PRECONDITION(aPrevSibling->GetNextSibling() == aFromChild, "bad prev sibling"); // Disconnect aFromChild from its previous sibling aPrevSibling->SetNextSibling(nsnull); if (nsnull != GetNextInFlow()) { // XXX This is not a very good thing to do. If it gets removed // then remove the copy of this routine that doesn't do this from // nsInlineFrame. nsContainerFrame* nextInFlow = (nsContainerFrame*)GetNextInFlow(); // When pushing and pulling frames we need to check for whether any // views need to be reparented. for (nsIFrame* f = aFromChild; f; f = f->GetNextSibling()) { nsHTMLContainerFrame::ReparentFrameView(aPresContext, f, this, nextInFlow); } nextInFlow->mFrames.InsertFrames(nextInFlow, nsnull, aFromChild); } else { // Add the frames to our overflow list SetOverflowFrames(aPresContext, aFromChild); } } /** * Moves any frames on the overflow lists (the prev-in-flow's overflow list and * the receiver's overflow list) to the child list. * * Updates this frame's child count and content mapping. * * @return PR_TRUE if any frames were moved and PR_FALSE otherwise */ PRBool nsContainerFrame::MoveOverflowToChildList(nsPresContext* aPresContext) { PRBool result = PR_FALSE; // Check for an overflow list with our prev-in-flow nsContainerFrame* prevInFlow = (nsContainerFrame*)GetPrevInFlow(); if (nsnull != prevInFlow) { nsIFrame* prevOverflowFrames = prevInFlow->GetOverflowFrames(aPresContext, PR_TRUE); if (prevOverflowFrames) { NS_ASSERTION(mFrames.IsEmpty(), "bad overflow list"); // When pushing and pulling frames we need to check for whether any // views need to be reparented. for (nsIFrame* f = prevOverflowFrames; f; f = f->GetNextSibling()) { nsHTMLContainerFrame::ReparentFrameView(aPresContext, f, prevInFlow, this); } mFrames.InsertFrames(this, nsnull, prevOverflowFrames); result = PR_TRUE; } } // It's also possible that we have an overflow list for ourselves nsIFrame* overflowFrames = GetOverflowFrames(aPresContext, PR_TRUE); if (overflowFrames) { NS_ASSERTION(mFrames.NotEmpty(), "overflow list w/o frames"); mFrames.AppendFrames(nsnull, overflowFrames); result = PR_TRUE; } return result; } ///////////////////////////////////////////////////////////////////////////// // Debugging #ifdef NS_DEBUG NS_IMETHODIMP nsContainerFrame::List(FILE* out, PRInt32 aIndent) const { IndentBy(out, aIndent); ListTag(out); #ifdef DEBUG_waterson fprintf(out, " [parent=%p]", NS_STATIC_CAST(void*, mParent)); #endif if (HasView()) { fprintf(out, " [view=%p]", NS_STATIC_CAST(void*, GetView())); } if (nsnull != mNextSibling) { fprintf(out, " next=%p", NS_STATIC_CAST(void*, mNextSibling)); } if (nsnull != GetPrevContinuation()) { fprintf(out, " prev-continuation=%p", NS_STATIC_CAST(void*, GetPrevContinuation())); } if (nsnull != GetNextContinuation()) { fprintf(out, " next-continuation=%p", NS_STATIC_CAST(void*, GetNextContinuation())); } fprintf(out, " {%d,%d,%d,%d}", mRect.x, mRect.y, mRect.width, mRect.height); if (0 != mState) { fprintf(out, " [state=%08x]", mState); } fprintf(out, " [content=%p]", NS_STATIC_CAST(void*, mContent)); nsContainerFrame* f = NS_CONST_CAST(nsContainerFrame*, this); nsRect* overflowArea = f->GetOverflowAreaProperty(PR_FALSE); if (overflowArea) { fprintf(out, " [overflow=%d,%d,%d,%d]", overflowArea->x, overflowArea->y, overflowArea->width, overflowArea->height); } fprintf(out, " [sc=%p]", NS_STATIC_CAST(void*, mStyleContext)); nsIAtom* pseudoTag = mStyleContext->GetPseudoType(); if (pseudoTag) { nsAutoString atomString; pseudoTag->ToString(atomString); fprintf(out, " pst=%s", NS_LossyConvertUTF16toASCII(atomString).get()); } // Output the children nsIAtom* listName = nsnull; PRInt32 listIndex = 0; PRBool outputOneList = PR_FALSE; do { nsIFrame* kid = GetFirstChild(listName); if (nsnull != kid) { if (outputOneList) { IndentBy(out, aIndent); } outputOneList = PR_TRUE; nsAutoString tmp; if (nsnull != listName) { listName->ToString(tmp); fputs(NS_LossyConvertUTF16toASCII(tmp).get(), out); } fputs("<\n", out); while (nsnull != kid) { // Verify the child frame's parent frame pointer is correct NS_ASSERTION(kid->GetParent() == (nsIFrame*)this, "bad parent frame pointer"); // Have the child frame list nsIFrameDebug* frameDebug; if (NS_SUCCEEDED(kid->QueryInterface(NS_GET_IID(nsIFrameDebug), (void**)&frameDebug))) { frameDebug->List(out, aIndent + 1); } kid = kid->GetNextSibling(); } IndentBy(out, aIndent); fputs(">\n", out); } listName = GetAdditionalChildListName(listIndex++); } while(nsnull != listName); if (!outputOneList) { fputs("<>\n", out); } return NS_OK; } #endif