/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- * vim: set ts=2 sw=2 et tw=78: * ***** 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): * Steve Clark * Håkan Waara * Dan Rosen * Daniel Glazman * 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 ***** * * This Original Code has been modified by IBM Corporation. * Modifications made by IBM described herein are * Copyright (c) International Business Machines * Corporation, 2000 * * Modifications to Mozilla code or documentation * identified per MPL Section 3.3 * * Date Modified by Description of modification * 05/03/2000 IBM Corp. Observer events for reflow states */ /* a presentation of a document, part 2 */ #define PL_ARENA_CONST_ALIGN_MASK 3 #include "nsIPresShell.h" #include "nsPresContext.h" #include "nsIContent.h" #include "nsIDocument.h" #include "nsIDOMXULDocument.h" #include "nsStubDocumentObserver.h" #include "nsStyleSet.h" #include "nsICSSStyleSheet.h" // XXX for UA sheet loading hack, can this go away please? #include "nsIDOMCSSStyleSheet.h" // for Pref-related rule management (bugs 22963,20760,31816) #include "nsINameSpaceManager.h" // for Pref-related rule management (bugs 22963,20760,31816) #include "nsIServiceManager.h" #include "nsFrame.h" #include "nsIViewManager.h" #include "nsCRT.h" #include "nsCRTGlue.h" #include "prlog.h" #include "prmem.h" #include "prprf.h" #include "prinrval.h" #include "nsVoidArray.h" #include "nsCOMArray.h" #include "nsHashtable.h" #include "nsIViewObserver.h" #include "nsContainerFrame.h" #include "nsIDeviceContext.h" #include "nsEventStateManager.h" #include "nsDOMEvent.h" #include "nsGUIEvent.h" #include "nsHTMLParts.h" #include "nsContentUtils.h" #include "nsISelection.h" #include "nsISelectionController.h" #include "nsISelectionPrivate.h" #include "nsLayoutCID.h" #include "nsGkAtoms.h" #include "nsIDOMRange.h" #include "nsIDOMDocument.h" #include "nsIDOMNode.h" #include "nsIDOM3Node.h" #include "nsIDOMNodeList.h" #include "nsIDOMElement.h" #include "nsRange.h" #include "nsCSSPseudoElements.h" #include "nsCOMPtr.h" #include "nsAutoPtr.h" #include "nsReadableUtils.h" #include "nsUnicharUtils.h" #include "nsWeakReference.h" #include "nsIPageSequenceFrame.h" #include "nsICaret.h" #include "nsIDOMHTMLDocument.h" #include "nsIXPointer.h" #include "nsIDOMXMLDocument.h" #include "nsIScrollableView.h" #include "nsIParser.h" #include "nsParserCIID.h" #include "nsFrameSelection.h" #include "nsIDOMNSHTMLInputElement.h" //optimization for ::DoXXX commands #include "nsIDOMNSHTMLTextAreaElement.h" #include "nsViewsCID.h" #include "nsFrameManager.h" #include "nsXPCOM.h" #include "nsISupportsPrimitives.h" #include "nsILayoutHistoryState.h" #include "nsILineIterator.h" // for ScrollContentIntoView #include "nsTimer.h" #include "nsWeakPtr.h" #include "plarena.h" #include "pldhash.h" #include "nsIObserverService.h" #include "nsIObserver.h" #include "nsIDocShell.h" // for reflow observation #include "nsIBaseWindow.h" #include "nsLayoutErrors.h" #include "nsLayoutUtils.h" #include "nsCSSRendering.h" #ifdef NS_DEBUG #include "nsIFrameDebug.h" #endif // for |#ifdef DEBUG| code #include "nsSpaceManager.h" #include "prenv.h" #include "nsIAttribute.h" #include "nsIGlobalHistory2.h" #include "nsDisplayList.h" #include "nsIRegion.h" #include "nsRegion.h" #ifdef MOZ_REFLOW_PERF_DSP #include "nsIRenderingContext.h" #include "nsIFontMetrics.h" #endif #include "nsIReflowCallback.h" #include "nsPIDOMWindow.h" #include "nsIFocusController.h" #include "nsIPluginInstance.h" #include "nsIObjectFrame.h" #include "nsIObjectLoadingContent.h" #include "nsNetUtil.h" #include "nsEventDispatcher.h" #include "nsThreadUtils.h" #include "nsStyleSheetService.h" #include "gfxImageSurface.h" #include "gfxContext.h" // Drag & Drop, Clipboard #include "nsWidgetsCID.h" #include "nsIClipboard.h" #include "nsIClipboardHelper.h" #include "nsIDocShellTreeItem.h" #include "nsIURI.h" #include "nsIScrollableFrame.h" #include "prtime.h" #include "prlong.h" #include "nsIDragService.h" #include "nsCopySupport.h" #include "nsIDOMHTMLAnchorElement.h" #include "nsIDOMHTMLAreaElement.h" #include "nsIDOMHTMLLinkElement.h" #include "nsITimer.h" #ifdef ACCESSIBILITY #include "nsIAccessibilityService.h" #include "nsIAccessible.h" #include "nsIAccessibleEvent.h" #endif // For style data reconstruction #include "nsStyleChangeList.h" #include "nsCSSFrameConstructor.h" #ifdef MOZ_XUL #include "nsMenuFrame.h" #include "nsITreeBoxObject.h" #endif #include "nsIMenuParent.h" #include "nsPlaceholderFrame.h" // Content viewer interfaces #include "nsIContentViewer.h" #include "imgIEncoder.h" #include "gfxPlatform.h" #include "nsContentCID.h" static NS_DEFINE_CID(kCSSStyleSheetCID, NS_CSS_STYLESHEET_CID); static NS_DEFINE_IID(kRangeCID, NS_RANGE_CID); PRBool nsIPresShell::gIsAccessibilityActive = PR_FALSE; // convert a color value to a string, in the CSS format #RRGGBB // * - initially created for bugs 31816, 20760, 22963 static void ColorToString(nscolor aColor, nsAutoString &aString); // Class ID's static NS_DEFINE_CID(kFrameSelectionCID, NS_FRAMESELECTION_CID); // RangePaintInfo is used to paint ranges to offscreen buffers struct RangePaintInfo { nsCOMPtr mRange; nsDisplayListBuilder mBuilder; nsDisplayList mList; // offset of builder's reference frame to the root frame nsPoint mRootOffset; RangePaintInfo(nsIRange* aRange, nsIFrame* aFrame) : mRange(aRange), mBuilder(aFrame, PR_FALSE, PR_FALSE) { } ~RangePaintInfo() { mList.DeleteAll(); } }; #undef NOISY // ---------------------------------------------------------------------- #ifdef NS_DEBUG // Set the environment variable GECKO_VERIFY_REFLOW_FLAGS to one or // more of the following flags (comma separated) for handy debug // output. static PRUint32 gVerifyReflowFlags; struct VerifyReflowFlags { const char* name; PRUint32 bit; }; static const VerifyReflowFlags gFlags[] = { { "verify", VERIFY_REFLOW_ON }, { "reflow", VERIFY_REFLOW_NOISY }, { "all", VERIFY_REFLOW_ALL }, { "list-commands", VERIFY_REFLOW_DUMP_COMMANDS }, { "noisy-commands", VERIFY_REFLOW_NOISY_RC }, { "really-noisy-commands", VERIFY_REFLOW_REALLY_NOISY_RC }, { "space-manager", VERIFY_REFLOW_INCLUDE_SPACE_MANAGER }, { "resize", VERIFY_REFLOW_DURING_RESIZE_REFLOW }, }; #define NUM_VERIFY_REFLOW_FLAGS (sizeof(gFlags) / sizeof(gFlags[0])) static void ShowVerifyReflowFlags() { printf("Here are the available GECKO_VERIFY_REFLOW_FLAGS:\n"); const VerifyReflowFlags* flag = gFlags; const VerifyReflowFlags* limit = gFlags + NUM_VERIFY_REFLOW_FLAGS; while (flag < limit) { printf(" %s\n", flag->name); ++flag; } printf("Note: GECKO_VERIFY_REFLOW_FLAGS is a comma separated list of flag\n"); printf("names (no whitespace)\n"); } #endif //======================================================================== //======================================================================== //======================================================================== #ifdef MOZ_REFLOW_PERF class ReflowCountMgr; static const char kGrandTotalsStr[] = "Grand Totals"; // Counting Class class ReflowCounter { public: ReflowCounter(ReflowCountMgr * aMgr = nsnull); ~ReflowCounter(); void ClearTotals(); void DisplayTotals(const char * aStr); void DisplayDiffTotals(const char * aStr); void DisplayHTMLTotals(const char * aStr); void Add() { mTotal++; } void Add(PRUint32 aTotal) { mTotal += aTotal; } void CalcDiffInTotals(); void SetTotalsCache(); void SetMgr(ReflowCountMgr * aMgr) { mMgr = aMgr; } PRUint32 GetTotal() { return mTotal; } protected: void DisplayTotals(PRUint32 aTotal, const char * aTitle); void DisplayHTMLTotals(PRUint32 aTotal, const char * aTitle); PRUint32 mTotal; PRUint32 mCacheTotal; ReflowCountMgr * mMgr; // weak reference (don't delete) }; // Counting Class class IndiReflowCounter { public: IndiReflowCounter(ReflowCountMgr * aMgr = nsnull) : mFrame(nsnull), mCount(0), mMgr(aMgr), mCounter(aMgr), mHasBeenOutput(PR_FALSE) {} virtual ~IndiReflowCounter() {} nsAutoString mName; nsIFrame * mFrame; // weak reference (don't delete) PRInt32 mCount; ReflowCountMgr * mMgr; // weak reference (don't delete) ReflowCounter mCounter; PRBool mHasBeenOutput; }; //-------------------- // Manager Class //-------------------- class ReflowCountMgr { public: ReflowCountMgr(); virtual ~ReflowCountMgr(); void ClearTotals(); void ClearGrandTotals(); void DisplayTotals(const char * aStr); void DisplayHTMLTotals(const char * aStr); void DisplayDiffsInTotals(const char * aStr); void Add(const char * aName, nsIFrame * aFrame); ReflowCounter * LookUp(const char * aName); void PaintCount(const char * aName, nsIRenderingContext* aRenderingContext, nsPresContext* aPresContext, nsIFrame * aFrame, PRUint32 aColor); FILE * GetOutFile() { return mFD; } PLHashTable * GetIndiFrameHT() { return mIndiFrameCounts; } void SetPresContext(nsPresContext * aPresContext) { mPresContext = aPresContext; } // weak reference void SetPresShell(nsIPresShell* aPresShell) { mPresShell= aPresShell; } // weak reference void SetDumpFrameCounts(PRBool aVal) { mDumpFrameCounts = aVal; } void SetDumpFrameByFrameCounts(PRBool aVal) { mDumpFrameByFrameCounts = aVal; } void SetPaintFrameCounts(PRBool aVal) { mPaintFrameByFrameCounts = aVal; } protected: void DisplayTotals(PRUint32 aTotal, PRUint32 * aDupArray, char * aTitle); void DisplayHTMLTotals(PRUint32 aTotal, PRUint32 * aDupArray, char * aTitle); PR_STATIC_CALLBACK(PRIntn) RemoveItems(PLHashEntry *he, PRIntn i, void *arg); PR_STATIC_CALLBACK(PRIntn) RemoveIndiItems(PLHashEntry *he, PRIntn i, void *arg); void CleanUp(); // stdout Output Methods PR_STATIC_CALLBACK(PRIntn) DoSingleTotal(PLHashEntry *he, PRIntn i, void *arg); PR_STATIC_CALLBACK(PRIntn) DoSingleIndi(PLHashEntry *he, PRIntn i, void *arg); void DoGrandTotals(); void DoIndiTotalsTree(); // HTML Output Methods PR_STATIC_CALLBACK(PRIntn) DoSingleHTMLTotal(PLHashEntry *he, PRIntn i, void *arg); void DoGrandHTMLTotals(); // Zero Out the Totals PR_STATIC_CALLBACK(PRIntn) DoClearTotals(PLHashEntry *he, PRIntn i, void *arg); // Displays the Diff Totals PR_STATIC_CALLBACK(PRIntn) DoDisplayDiffTotals(PLHashEntry *he, PRIntn i, void *arg); PLHashTable * mCounts; PLHashTable * mIndiFrameCounts; FILE * mFD; PRBool mDumpFrameCounts; PRBool mDumpFrameByFrameCounts; PRBool mPaintFrameByFrameCounts; PRBool mCycledOnce; // Root Frame for Individual Tracking nsPresContext * mPresContext; nsIPresShell* mPresShell; // ReflowCountMgr gReflowCountMgr; }; #endif //======================================================================== // comment out to hide caret #define SHOW_CARET // The upper bound on the amount of time to spend reflowing, in // microseconds. When this bound is exceeded and reflow commands are // still queued up, a reflow event is posted. The idea is for reflow // to not hog the processor beyond the time specifed in // gMaxRCProcessingTime. This data member is initialized from the // layout.reflow.timeslice pref. #define NS_MAX_REFLOW_TIME 1000000 static PRInt32 gMaxRCProcessingTime = -1; // Largest chunk size we recycle static const size_t gMaxRecycledSize = 400; #define MARK_INCREMENT 50 #define BLOCK_INCREMENT 4044 /* a bit under 4096, for malloc overhead */ /**A block of memory that the stack will * chop up and hand out */ struct StackBlock { // a block of memory. Note that this must be first so that it will // be aligned. char mBlock[BLOCK_INCREMENT]; // another block of memory that would only be created // if our stack overflowed. Yes we have the ability // to grow on a stack overflow StackBlock* mNext; StackBlock() : mNext(nsnull) { } ~StackBlock() { } }; /* we hold an array of marks. A push pushes a mark on the stack * a pop pops it off. */ struct StackMark { // the block of memory we are currently handing out chunks of StackBlock* mBlock; // our current position in the memory size_t mPos; }; /* A stack arena allows a stack based interface to a block of memory. * It should be used when you need to allocate some temporary memory that * you will immediately return. */ class StackArena { public: StackArena(); ~StackArena(); nsresult Init() { return mBlocks ? NS_OK : NS_ERROR_OUT_OF_MEMORY; } // Memory management functions void* Allocate(size_t aSize); void Push(); void Pop(); private: // our current position in memory size_t mPos; // a list of memory block. Usually there is only one // but if we overrun our stack size we can get more memory. StackBlock* mBlocks; // the current block of memory we are passing our chucks of StackBlock* mCurBlock; // our stack of mark where push has been called StackMark* mMarks; // the current top of the mark list PRUint32 mStackTop; // the size of the mark array PRUint32 mMarkLength; }; StackArena::StackArena() { mMarkLength = 0; mMarks = nsnull; // allocate our stack memory mBlocks = new StackBlock(); mCurBlock = mBlocks; mStackTop = 0; mPos = 0; } StackArena::~StackArena() { // free up our data delete[] mMarks; while(mBlocks) { StackBlock* toDelete = mBlocks; mBlocks = mBlocks->mNext; delete toDelete; } } void StackArena::Push() { // Resize the mark array if we overrun it. Failure to allocate the // mark array is not fatal; we just won't free to that mark. This // allows callers not to worry about error checking. if (mStackTop >= mMarkLength) { PRUint32 newLength = mStackTop + MARK_INCREMENT; StackMark* newMarks = new StackMark[newLength]; if (newMarks) { if (mMarkLength) memcpy(newMarks, mMarks, sizeof(StackMark)*mMarkLength); // Fill in any marks that we couldn't allocate during a prior call // to Push(). for (; mMarkLength < mStackTop; ++mMarkLength) { NS_NOTREACHED("should only hit this on out-of-memory"); newMarks[mMarkLength].mBlock = mCurBlock; newMarks[mMarkLength].mPos = mPos; } delete [] mMarks; mMarks = newMarks; mMarkLength = newLength; } } // set a mark at the top (if we can) NS_ASSERTION(mStackTop < mMarkLength, "out of memory"); if (mStackTop < mMarkLength) { mMarks[mStackTop].mBlock = mCurBlock; mMarks[mStackTop].mPos = mPos; } mStackTop++; } void* StackArena::Allocate(size_t aSize) { NS_ASSERTION(mStackTop > 0, "Allocate called without Push"); // make sure we are aligned. Beard said 8 was safer then 4. // Round size to multiple of 8 aSize = PR_ROUNDUP(aSize, 8); // if the size makes the stack overflow. Grab another block for the stack if (mPos + aSize >= BLOCK_INCREMENT) { NS_ASSERTION(aSize <= BLOCK_INCREMENT,"Requested memory is greater that our block size!!"); if (mCurBlock->mNext == nsnull) mCurBlock->mNext = new StackBlock(); mCurBlock = mCurBlock->mNext; mPos = 0; } // return the chunk they need. void *result = mCurBlock->mBlock + mPos; mPos += aSize; return result; } void StackArena::Pop() { // pop off the mark NS_ASSERTION(mStackTop > 0, "unmatched pop"); mStackTop--; if (mStackTop >= mMarkLength) { // We couldn't allocate the marks array at the time of the push, so // we don't know where we're freeing to. NS_NOTREACHED("out of memory"); if (mStackTop == 0) { // But we do know if we've completely pushed the stack. mCurBlock = mBlocks; mPos = 0; } return; } #ifdef DEBUG // Mark the "freed" memory with 0xdd to help with debugging of memory // allocation problems. { StackBlock *block = mMarks[mStackTop].mBlock, *block_end = mCurBlock; size_t pos = mMarks[mStackTop].mPos; for (; block != block_end; block = block->mNext, pos = 0) { memset(block->mBlock + pos, 0xdd, sizeof(block->mBlock) - pos); } memset(block->mBlock + pos, 0xdd, mPos - pos); } #endif mCurBlock = mMarks[mStackTop].mBlock; mPos = mMarks[mStackTop].mPos; } // Uncomment this to disable the frame arena. //#define DEBUG_TRACEMALLOC_FRAMEARENA 1 // Memory is allocated 4-byte aligned. We have recyclers for chunks up to // 200 bytes class FrameArena { public: FrameArena(PRUint32 aArenaSize = 4096); ~FrameArena(); // Memory management functions NS_HIDDEN_(void*) AllocateFrame(size_t aSize); NS_HIDDEN_(void) FreeFrame(size_t aSize, void* aPtr); private: #ifdef DEBUG // Number of frames in the pool PRUint32 mFrameCount; #endif #if !defined(DEBUG_TRACEMALLOC_FRAMEARENA) // Underlying arena pool PLArenaPool mPool; // The recycler array is sparse with the indices being multiples of 4, // i.e., 0, 4, 8, 12, 16, 20, ... void* mRecyclers[gMaxRecycledSize >> 2]; #endif }; FrameArena::FrameArena(PRUint32 aArenaSize) #ifdef DEBUG : mFrameCount(0) #endif { #if !defined(DEBUG_TRACEMALLOC_FRAMEARENA) // Initialize the arena pool PL_INIT_ARENA_POOL(&mPool, "FrameArena", aArenaSize); // Zero out the recyclers array memset(mRecyclers, 0, sizeof(mRecyclers)); #endif } FrameArena::~FrameArena() { NS_ASSERTION(mFrameCount == 0, "Some objects allocated with AllocateFrame were not freed"); #if !defined(DEBUG_TRACEMALLOC_FRAMEARENA) // Free the arena in the pool and finish using it PL_FinishArenaPool(&mPool); #endif } void* FrameArena::AllocateFrame(size_t aSize) { void* result = nsnull; #if defined(DEBUG_TRACEMALLOC_FRAMEARENA) result = PR_Malloc(aSize); #else // Ensure we have correct alignment for pointers. Important for Tru64 aSize = PR_ROUNDUP(aSize, sizeof(void*)); // Check recyclers first if (aSize < gMaxRecycledSize) { const int index = aSize >> 2; result = mRecyclers[index]; if (result) { // Need to move to the next object void* next = *((void**)result); mRecyclers[index] = next; } } if (!result) { // Allocate a new chunk from the arena PL_ARENA_ALLOCATE(result, &mPool, aSize); } #endif #ifdef DEBUG if (result != nsnull) ++mFrameCount; #endif return result; } void FrameArena::FreeFrame(size_t aSize, void* aPtr) { #ifdef DEBUG --mFrameCount; // Mark the memory with 0xdd in DEBUG builds so that there will be // problems if someone tries to access memory that they've freed. memset(aPtr, 0xdd, aSize); #endif #if defined(DEBUG_TRACEMALLOC_FRAMEARENA) PR_Free(aPtr); #else // Ensure we have correct alignment for pointers. Important for Tru64 aSize = PR_ROUNDUP(aSize, sizeof(void*)); // See if it's a size that we recycle if (aSize < gMaxRecycledSize) { const int index = aSize >> 2; void* currentTop = mRecyclers[index]; mRecyclers[index] = aPtr; *((void**)aPtr) = currentTop; } #ifdef DEBUG_dbaron else { fprintf(stderr, "WARNING: FrameArena::FreeFrame leaking chunk of %d bytes.\n", aSize); } #endif #endif } struct nsCallbackEventRequest { nsIReflowCallback* callback; nsCallbackEventRequest* next; }; // ---------------------------------------------------------------------------- class nsPresShellEventCB; class PresShell : public nsIPresShell, public nsIViewObserver, public nsStubDocumentObserver, public nsISelectionController, public nsIObserver, public nsSupportsWeakReference { public: PresShell(); NS_DECL_AND_IMPL_ZEROING_OPERATOR_NEW // nsISupports NS_DECL_ISUPPORTS // nsIPresShell NS_IMETHOD Init(nsIDocument* aDocument, nsPresContext* aPresContext, nsIViewManager* aViewManager, nsStyleSet* aStyleSet, nsCompatibility aCompatMode); NS_IMETHOD Destroy(); virtual NS_HIDDEN_(void*) AllocateFrame(size_t aSize); virtual NS_HIDDEN_(void) FreeFrame(size_t aSize, void* aFreeChunk); // Dynamic stack memory allocation virtual NS_HIDDEN_(void) PushStackMemory(); virtual NS_HIDDEN_(void) PopStackMemory(); virtual NS_HIDDEN_(void*) AllocateStackMemory(size_t aSize); NS_IMETHOD SetPreferenceStyleRules(PRBool aForceReflow); NS_IMETHOD GetSelection(SelectionType aType, nsISelection** aSelection); virtual nsISelection* GetCurrentSelection(SelectionType aType); NS_IMETHOD SetDisplaySelection(PRInt16 aToggle); NS_IMETHOD GetDisplaySelection(PRInt16 *aToggle); NS_IMETHOD ScrollSelectionIntoView(SelectionType aType, SelectionRegion aRegion, PRBool aIsSynchronous); NS_IMETHOD RepaintSelection(SelectionType aType); NS_IMETHOD BeginObservingDocument(); NS_IMETHOD EndObservingDocument(); NS_IMETHOD GetDidInitialReflow(PRBool *aDidInitialReflow); NS_IMETHOD InitialReflow(nscoord aWidth, nscoord aHeight); NS_IMETHOD ResizeReflow(nscoord aWidth, nscoord aHeight); NS_IMETHOD StyleChangeReflow(); NS_IMETHOD GetPageSequenceFrame(nsIPageSequenceFrame** aResult) const; virtual NS_HIDDEN_(nsIFrame*) GetPrimaryFrameFor(nsIContent* aContent) const; virtual NS_HIDDEN_(nsIFrame*) GetRealPrimaryFrameFor(nsIContent* aContent) const; NS_IMETHOD GetLayoutObjectFor(nsIContent* aContent, nsISupports** aResult) const; NS_IMETHOD GetPlaceholderFrameFor(nsIFrame* aFrame, nsIFrame** aPlaceholderFrame) const; NS_IMETHOD FrameNeedsReflow(nsIFrame *aFrame, IntrinsicDirty aIntrinsicDirty, nsFrameState aBitToAdd); NS_IMETHOD CancelAllPendingReflows(); NS_IMETHOD IsSafeToFlush(PRBool& aIsSafeToFlush); NS_IMETHOD FlushPendingNotifications(mozFlushType aType); /** * Recreates the frames for a node */ NS_IMETHOD RecreateFramesFor(nsIContent* aContent); /** * Post a callback that should be handled after reflow has finished. */ NS_IMETHOD PostReflowCallback(nsIReflowCallback* aCallback); NS_IMETHOD CancelReflowCallback(nsIReflowCallback* aCallback); NS_IMETHOD ClearFrameRefs(nsIFrame* aFrame); NS_IMETHOD CreateRenderingContext(nsIFrame *aFrame, nsIRenderingContext** aContext); NS_IMETHOD GoToAnchor(const nsAString& aAnchorName, PRBool aScroll); NS_IMETHOD ScrollContentIntoView(nsIContent* aContent, PRIntn aVPercent, PRIntn aHPercent) const; NS_IMETHOD SetIgnoreFrameDestruction(PRBool aIgnore); NS_IMETHOD NotifyDestroyingFrame(nsIFrame* aFrame); NS_IMETHOD DoCopy(); NS_IMETHOD GetSelectionForCopy(nsISelection** outSelection); NS_IMETHOD GetLinkLocation(nsIDOMNode* aNode, nsAString& aLocationString); NS_IMETHOD DoGetContents(const nsACString& aMimeType, PRUint32 aFlags, PRBool aSelectionOnly, nsAString& outValue); NS_IMETHOD CaptureHistoryState(nsILayoutHistoryState** aLayoutHistoryState, PRBool aLeavingPage); NS_IMETHOD IsPaintingSuppressed(PRBool* aResult); NS_IMETHOD UnsuppressPainting(); NS_IMETHOD DisableThemeSupport(); virtual PRBool IsThemeSupportEnabled(); virtual nsresult GetAgentStyleSheets(nsCOMArray& aSheets); virtual nsresult SetAgentStyleSheets(const nsCOMArray& aSheets); virtual nsresult AddOverrideStyleSheet(nsIStyleSheet *aSheet); virtual nsresult RemoveOverrideStyleSheet(nsIStyleSheet *aSheet); NS_IMETHOD HandleEventWithTarget(nsEvent* aEvent, nsIFrame* aFrame, nsIContent* aContent, nsEventStatus* aStatus); NS_IMETHOD GetEventTargetFrame(nsIFrame** aFrame); NS_IMETHOD GetEventTargetContent(nsEvent* aEvent, nsIContent** aContent); NS_IMETHOD IsReflowLocked(PRBool* aIsLocked); virtual nsresult ReconstructFrames(void); virtual void Freeze(); virtual void Thaw(); virtual nsIFrame* GetFrameForPoint(nsIFrame* aFrame, nsPoint aPt); NS_IMETHOD RenderDocument(const nsRect& aRect, PRBool aUntrusted, PRBool aIgnoreViewportScrolling, nscolor aBackgroundColor, gfxContext* aThebesContext); virtual already_AddRefed RenderNode(nsIDOMNode* aNode, nsIRegion* aRegion, nsPoint& aPoint, nsRect* aScreenRect); virtual already_AddRefed RenderSelection(nsISelection* aSelection, nsPoint& aPoint, nsRect* aScreenRect); //nsIViewObserver interface NS_IMETHOD Paint(nsIView *aView, nsIRenderingContext* aRenderingContext, const nsRegion& aDirtyRegion); NS_IMETHOD ComputeRepaintRegionForCopy(nsIView* aRootView, nsIView* aMovingView, nsPoint aDelta, const nsRect& aCopyRect, nsRegion* aRepaintRegion); NS_IMETHOD HandleEvent(nsIView* aView, nsGUIEvent* aEvent, nsEventStatus* aEventStatus); NS_IMETHOD HandleDOMEventWithTarget(nsIContent* aTargetContent, nsEvent* aEvent, nsEventStatus* aStatus); NS_IMETHOD ResizeReflow(nsIView *aView, nscoord aWidth, nscoord aHeight); NS_IMETHOD_(PRBool) IsVisible(); NS_IMETHOD_(void) WillPaint(); // caret handling NS_IMETHOD GetCaret(nsICaret **aOutCaret); NS_IMETHOD_(void) MaybeInvalidateCaretPosition(); NS_IMETHOD SetCaretEnabled(PRBool aInEnable); NS_IMETHOD SetCaretReadOnly(PRBool aReadOnly); NS_IMETHOD GetCaretEnabled(PRBool *aOutEnabled); NS_IMETHOD SetCaretVisibilityDuringSelection(PRBool aVisibility); virtual void SetCaret(nsICaret *aNewCaret); virtual void RestoreCaret(); NS_IMETHOD SetSelectionFlags(PRInt16 aInEnable); NS_IMETHOD GetSelectionFlags(PRInt16 *aOutEnable); // nsISelectionController NS_IMETHOD CharacterMove(PRBool aForward, PRBool aExtend); NS_IMETHOD WordMove(PRBool aForward, PRBool aExtend); NS_IMETHOD WordExtendForDelete(PRBool aForward); NS_IMETHOD LineMove(PRBool aForward, PRBool aExtend); NS_IMETHOD IntraLineMove(PRBool aForward, PRBool aExtend); NS_IMETHOD PageMove(PRBool aForward, PRBool aExtend); NS_IMETHOD ScrollPage(PRBool aForward); NS_IMETHOD ScrollLine(PRBool aForward); NS_IMETHOD ScrollHorizontal(PRBool aLeft); NS_IMETHOD CompleteScroll(PRBool aForward); NS_IMETHOD CompleteMove(PRBool aForward, PRBool aExtend); NS_IMETHOD SelectAll(); NS_IMETHOD CheckVisibility(nsIDOMNode *node, PRInt16 startOffset, PRInt16 EndOffset, PRBool *_retval); // nsIDocumentObserver virtual void BeginUpdate(nsIDocument* aDocument, nsUpdateType aUpdateType); virtual void EndUpdate(nsIDocument* aDocument, nsUpdateType aUpdateType); virtual void BeginLoad(nsIDocument* aDocument); virtual void EndLoad(nsIDocument* aDocument); virtual void ContentStatesChanged(nsIDocument* aDocument, nsIContent* aContent1, nsIContent* aContent2, PRInt32 aStateMask); virtual void StyleSheetAdded(nsIDocument* aDocument, nsIStyleSheet* aStyleSheet, PRBool aDocumentSheet); virtual void StyleSheetRemoved(nsIDocument* aDocument, nsIStyleSheet* aStyleSheet, PRBool aDocumentSheet); virtual void StyleSheetApplicableStateChanged(nsIDocument* aDocument, nsIStyleSheet* aStyleSheet, PRBool aApplicable); virtual void StyleRuleChanged(nsIDocument* aDocument, nsIStyleSheet* aStyleSheet, nsIStyleRule* aOldStyleRule, nsIStyleRule* aNewStyleRule); virtual void StyleRuleAdded(nsIDocument* aDocument, nsIStyleSheet* aStyleSheet, nsIStyleRule* aStyleRule); virtual void StyleRuleRemoved(nsIDocument* aDocument, nsIStyleSheet* aStyleSheet, nsIStyleRule* aStyleRule); // nsIMutationObserver NS_DECL_NSIMUTATIONOBSERVER_CHARACTERDATACHANGED NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED NS_DECL_NSIOBSERVER #ifdef MOZ_REFLOW_PERF NS_IMETHOD DumpReflows(); NS_IMETHOD CountReflows(const char * aName, nsIFrame * aFrame); NS_IMETHOD PaintCount(const char * aName, nsIRenderingContext* aRenderingContext, nsPresContext* aPresContext, nsIFrame * aFrame, PRUint32 aColor); NS_IMETHOD SetPaintFrameCount(PRBool aOn); #endif #ifdef DEBUG virtual void ListStyleContexts(nsIFrame *aRootFrame, FILE *out, PRInt32 aIndent = 0); virtual void ListStyleSheets(FILE *out, PRInt32 aIndent = 0); virtual void VerifyStyleTree(); #endif #ifdef PR_LOGGING static PRLogModuleInfo* gLog; #endif protected: virtual ~PresShell(); void HandlePostedReflowCallbacks(); void CancelPostedReflowCallbacks(); void UnsuppressAndInvalidate(); void WillCauseReflow() { ++mChangeNestCount; } nsresult DidCauseReflow(); void WillDoReflow(); void DidDoReflow(); nsresult ProcessReflowCommands(PRBool aInterruptible); void ClearReflowEventStatus(); void PostReflowEvent(); void DoReflow(nsIFrame* aFrame); #ifdef DEBUG void DoVerifyReflow(); void VerifyHasDirtyRootAncestor(nsIFrame* aFrame); #endif friend class nsPresShellEventCB; class ReflowEvent; friend class ReflowEvent; class ReflowEvent : public nsRunnable { public: NS_DECL_NSIRUNNABLE ReflowEvent(PresShell *aPresShell) : mPresShell(aPresShell) { NS_ASSERTION(aPresShell, "Null parameters!"); } void Revoke() { mPresShell = nsnull; } private: PresShell *mPresShell; }; // Utility to find which view to scroll. nsIScrollableView* GetViewToScroll(nsLayoutUtils::Direction aDirection); PRBool mCaretEnabled; #ifdef NS_DEBUG nsresult CloneStyleSet(nsStyleSet* aSet, nsStyleSet** aResult); PRBool VerifyIncrementalReflow(); PRBool mInVerifyReflow; void ShowEventTargetDebug(); #endif /** * methods that manage rules that are used to implement the associated preferences * - initially created for bugs 31816, 20760, 22963 */ nsresult ClearPreferenceStyleRules(void); nsresult CreatePreferenceStyleSheet(void); nsresult SetPrefLinkRules(void); nsresult SetPrefFocusRules(void); nsresult SetPrefNoScriptRule(); nsresult SetPrefNoFramesRule(void); // methods for painting a range to an offscreen buffer // given a display list, clip the items within the list to // the range nsRect ClipListToRange(nsDisplayListBuilder *aBuilder, nsDisplayList* aList, nsIRange* aRange); // create a RangePaintInfo for the range aRange containing the // display list needed to paint the range to a surface RangePaintInfo* CreateRangePaintInfo(nsIDOMRange* aRange, nsRect& aSurfaceRect); /* * Paint the items to a new surface and return it. * * aSelection - selection being painted, if any * aRegion - clip region, if any * aArea - area that the surface occupies, relative to the root frame * aPoint - reference point, typically the mouse position * aScreenRect - [out] set to the area of the screen the painted area should * be displayed at */ already_AddRefed PaintRangePaintInfo(nsTArray >* aItems, nsISelection* aSelection, nsIRegion* aRegion, nsRect aArea, nsPoint& aPoint, nsRect* aScreenRect); /** * Methods to handle changes to user and UA sheet lists that we get * notified about. */ void AddUserSheet(nsISupports* aSheet); void AddAgentSheet(nsISupports* aSheet); void RemoveSheet(nsStyleSet::sheetType aType, nsISupports* aSheet); // Hide a view if it is a popup void HideViewIfPopup(nsIView* aView); // Utility method to restore the root scrollframe state void RestoreRootScrollPosition(); // Method to handle actually flushing. This allows the caller to control // whether the reflow flush (if any) should be interruptible. nsresult DoFlushPendingNotifications(mozFlushType aType, PRBool aInterruptibleReflow); nsCOMPtr mPrefStyleSheet; // mStyleSet owns it but we // maintain a ref, may be null #ifdef DEBUG PRUint32 mUpdateCount; #endif // reflow roots that need to be reflowed, as both a queue and a hashtable nsVoidArray mDirtyRoots; PRPackedBool mDocumentLoading; PRPackedBool mIsReflowing; PRPackedBool mIgnoreFrameDestruction; PRPackedBool mHaveShutDown; // This is used to protect ourselves from triggering reflow while in the // middle of frame construction and the like... it really shouldn't be // needed, one hopes, but it is for now. PRUint32 mChangeNestCount; nsIFrame* mCurrentEventFrame; nsCOMPtr mCurrentEventContent; nsVoidArray mCurrentEventFrameStack; nsCOMArray mCurrentEventContentStack; nsCOMPtr mCaret; nsCOMPtr mOriginalCaret; PRInt16 mSelectionFlags; FrameArena mFrameArena; StackArena mStackArena; nsCOMPtr mDragService; nsRevocableEventPtr mReflowEvent; nsCallbackEventRequest* mFirstCallbackEventRequest; nsCallbackEventRequest* mLastCallbackEventRequest; PRPackedBool mIsThemeSupportDisabled; // Whether or not form controls should use nsITheme in this shell. PRPackedBool mIsDocumentGone; // We've been disconnected from the document. PRPackedBool mPaintingSuppressed; // For all documents we initially lock down painting. // We will refuse to paint the document until either // (a) our timer fires or (b) all frames are constructed. PRPackedBool mShouldUnsuppressPainting; // Indicates that it is safe to unlock painting once all pending // reflows have been processed. nsCOMPtr mPaintSuppressionTimer; // This timer controls painting suppression. Until it fires // or all frames are constructed, we won't paint anything but // our background and scrollbars. #define PAINTLOCK_EVENT_DELAY 250 // 250ms. This is actually // pref-controlled, but we use this // value if we fail to get the pref // for any reason. static void sPaintSuppressionCallback(nsITimer* aTimer, void* aPresShell); // A callback for the timer. MOZ_TIMER_DECLARE(mReflowWatch) // Used for measuring time spent in reflow MOZ_TIMER_DECLARE(mFrameCreationWatch) // Used for measuring time spent in frame creation #ifdef MOZ_REFLOW_PERF ReflowCountMgr * mReflowCountMgr; #endif nsresult CompleteMoveInner(PRBool aForward, PRBool aExtend, PRBool sScrollIntoView); private: PRBool InZombieDocument(nsIContent *aContent); nsresult RetargetEventToParent(nsGUIEvent* aEvent, nsEventStatus* aEventStatus); //helper funcs for event handling protected: //protected because nsPresShellEventCB needs this. nsIFrame* GetCurrentEventFrame(); private: void PushCurrentEventInfo(nsIFrame* aFrame, nsIContent* aContent); void PopCurrentEventInfo(); nsresult HandleEventInternal(nsEvent* aEvent, nsIView* aView, nsEventStatus *aStatus); nsresult HandlePositionedEvent(nsIView* aView, nsIFrame* aTargetFrame, nsGUIEvent* aEvent, nsEventStatus* aEventStatus); //help funcs for resize events void CreateResizeEventTimer(); void KillResizeEventTimer(); void FireResizeEvent(); static void sResizeEventCallback(nsITimer* aTimer, void* aPresShell) ; nsCOMPtr mResizeEventTimer; typedef void (*nsPluginEnumCallback)(PresShell*, nsIContent*); void EnumeratePlugins(nsIDOMDocument *aDocument, const nsString &aPluginTag, nsPluginEnumCallback aCallback); }; class nsPresShellEventCB : public nsDispatchingCallback { public: nsPresShellEventCB(PresShell* aPresShell) : mPresShell(aPresShell) {} virtual void HandleEvent(nsEventChainPostVisitor& aVisitor) { if (aVisitor.mPresContext && aVisitor.mEvent->eventStructType != NS_EVENT) { nsIFrame* frame = mPresShell->GetCurrentEventFrame(); if (frame) { frame->HandleEvent(aVisitor.mPresContext, (nsGUIEvent*) aVisitor.mEvent, &aVisitor.mEventStatus); } } } nsRefPtr mPresShell; }; #ifdef PR_LOGGING PRLogModuleInfo* PresShell::gLog; #endif #ifdef NS_DEBUG static void VerifyStyleTree(nsPresContext* aPresContext, nsFrameManager* aFrameManager) { if (nsIFrameDebug::GetVerifyStyleTreeEnable()) { nsIFrame* rootFrame = aFrameManager->GetRootFrame(); aFrameManager->DebugVerifyStyleTree(rootFrame); } } #define VERIFY_STYLE_TREE ::VerifyStyleTree(mPresContext, FrameManager()) #else #define VERIFY_STYLE_TREE #endif static PRBool gVerifyReflowEnabled; PRBool nsIPresShell::GetVerifyReflowEnable() { #ifdef NS_DEBUG static PRBool firstTime = PR_TRUE; if (firstTime) { firstTime = PR_FALSE; char* flags = PR_GetEnv("GECKO_VERIFY_REFLOW_FLAGS"); if (flags) { PRBool error = PR_FALSE; for (;;) { char* comma = PL_strchr(flags, ','); if (comma) *comma = '\0'; PRBool found = PR_FALSE; const VerifyReflowFlags* flag = gFlags; const VerifyReflowFlags* limit = gFlags + NUM_VERIFY_REFLOW_FLAGS; while (flag < limit) { if (PL_strcasecmp(flag->name, flags) == 0) { gVerifyReflowFlags |= flag->bit; found = PR_TRUE; break; } ++flag; } if (! found) error = PR_TRUE; if (! comma) break; *comma = ','; flags = comma + 1; } if (error) ShowVerifyReflowFlags(); } if (VERIFY_REFLOW_ON & gVerifyReflowFlags) { gVerifyReflowEnabled = PR_TRUE; printf("Note: verifyreflow is enabled"); if (VERIFY_REFLOW_NOISY & gVerifyReflowFlags) { printf(" (noisy)"); } if (VERIFY_REFLOW_ALL & gVerifyReflowFlags) { printf(" (all)"); } if (VERIFY_REFLOW_DUMP_COMMANDS & gVerifyReflowFlags) { printf(" (show reflow commands)"); } if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) { printf(" (noisy reflow commands)"); if (VERIFY_REFLOW_REALLY_NOISY_RC & gVerifyReflowFlags) { printf(" (REALLY noisy reflow commands)"); } } printf("\n"); } } #endif return gVerifyReflowEnabled; } void nsIPresShell::SetVerifyReflowEnable(PRBool aEnabled) { gVerifyReflowEnabled = aEnabled; } PRInt32 nsIPresShell::GetVerifyReflowFlags() { #ifdef NS_DEBUG return gVerifyReflowFlags; #else return 0; #endif } void nsIPresShell::AddWeakFrame(nsWeakFrame* aWeakFrame) { if (aWeakFrame->GetFrame()) { aWeakFrame->GetFrame()->AddStateBits(NS_FRAME_EXTERNAL_REFERENCE); } aWeakFrame->SetPreviousWeakFrame(mWeakFrames); mWeakFrames = aWeakFrame; } void nsIPresShell::RemoveWeakFrame(nsWeakFrame* aWeakFrame) { if (mWeakFrames == aWeakFrame) { mWeakFrames = aWeakFrame->GetPreviousWeakFrame(); return; } nsWeakFrame* nextWeak = mWeakFrames; while (nextWeak && nextWeak->GetPreviousWeakFrame() != aWeakFrame) { nextWeak = nextWeak->GetPreviousWeakFrame(); } if (nextWeak) { nextWeak->SetPreviousWeakFrame(aWeakFrame->GetPreviousWeakFrame()); } } already_AddRefed nsIPresShell::FrameSelection() { NS_IF_ADDREF(mSelection); return mSelection; } //---------------------------------------------------------------------- nsresult NS_NewPresShell(nsIPresShell** aInstancePtrResult) { NS_PRECONDITION(nsnull != aInstancePtrResult, "null ptr"); if (nsnull == aInstancePtrResult) { return NS_ERROR_NULL_POINTER; } PresShell* it = new PresShell(); if (nsnull == it) { return NS_ERROR_OUT_OF_MEMORY; } return it->QueryInterface(NS_GET_IID(nsIPresShell), (void **) aInstancePtrResult); } PresShell::PresShell() { mSelection = nsnull; #ifdef MOZ_REFLOW_PERF mReflowCountMgr = new ReflowCountMgr(); mReflowCountMgr->SetPresContext(mPresContext); mReflowCountMgr->SetPresShell(this); #endif #ifdef PR_LOGGING if (! gLog) gLog = PR_NewLogModule("PresShell"); #endif mSelectionFlags = nsISelectionDisplay::DISPLAY_TEXT | nsISelectionDisplay::DISPLAY_IMAGES; mIsThemeSupportDisabled = PR_FALSE; new (this) nsFrameManager(); } NS_IMPL_ISUPPORTS8(PresShell, nsIPresShell, nsIDocumentObserver, nsIViewObserver, nsISelectionController, nsISelectionDisplay, nsIObserver, nsISupportsWeakReference, nsIMutationObserver) PresShell::~PresShell() { if (!mHaveShutDown) { NS_NOTREACHED("Someone did not call nsIPresShell::destroy"); Destroy(); } NS_ASSERTION(mCurrentEventContentStack.Count() == 0, "Huh, event content left on the stack in pres shell dtor!"); NS_ASSERTION(mFirstCallbackEventRequest == nsnull && mLastCallbackEventRequest == nsnull, "post-reflow queues not empty. This means we're leaking"); delete mStyleSet; delete mFrameConstructor; mCurrentEventContent = nsnull; NS_IF_RELEASE(mPresContext); NS_IF_RELEASE(mDocument); if (mSelection) { mSelection->DisconnectFromPresShell(); NS_RELEASE(mSelection); } } /** * Initialize the presentation shell. Create view manager and style * manager. */ NS_IMETHODIMP PresShell::Init(nsIDocument* aDocument, nsPresContext* aPresContext, nsIViewManager* aViewManager, nsStyleSet* aStyleSet, nsCompatibility aCompatMode) { NS_PRECONDITION(nsnull != aDocument, "null ptr"); NS_PRECONDITION(nsnull != aPresContext, "null ptr"); NS_PRECONDITION(nsnull != aViewManager, "null ptr"); nsresult result; if ((nsnull == aDocument) || (nsnull == aPresContext) || (nsnull == aViewManager)) { return NS_ERROR_NULL_POINTER; } if (mDocument) { NS_WARNING("PresShell double init'ed"); return NS_ERROR_ALREADY_INITIALIZED; } result = mStackArena.Init(); NS_ENSURE_SUCCESS(result, result); mDocument = aDocument; NS_ADDREF(mDocument); mViewManager = aViewManager; // Create our frame constructor. mFrameConstructor = new nsCSSFrameConstructor(mDocument, this); NS_ENSURE_TRUE(mFrameConstructor, NS_ERROR_OUT_OF_MEMORY); // The document viewer owns both view manager and pres shell. mViewManager->SetViewObserver(this); // Bind the context to the presentation shell. mPresContext = aPresContext; NS_ADDREF(mPresContext); aPresContext->SetShell(this); // Now we can initialize the style set. result = aStyleSet->Init(aPresContext); NS_ENSURE_SUCCESS(result, result); // From this point on, any time we return an error we need to make // sure to null out mStyleSet first, since an error return from this // method will cause the caller to delete the style set, so we don't // want to delete it in our destructor. mStyleSet = aStyleSet; // Notify our prescontext that it now has a compatibility mode. Note that // this MUST happen after we set up our style set but before we create any // frames. mPresContext->CompatibilityModeChanged(); // setup the preference style rules (no forced reflow), and do it // before creating any frames. SetPreferenceStyleRules(PR_FALSE); result = CallCreateInstance(kFrameSelectionCID, &mSelection); if (NS_FAILED(result)) { mStyleSet = nsnull; return result; } // Create and initialize the frame manager result = FrameManager()->Init(this, mStyleSet); if (NS_FAILED(result)) { NS_WARNING("Frame manager initialization failed"); mStyleSet = nsnull; return result; } mSelection->Init(this, nsnull); // Important: this has to happen after the selection has been set up #ifdef SHOW_CARET // make the caret nsresult err = NS_NewCaret(getter_AddRefs(mCaret)); if (NS_SUCCEEDED(err)) { mCaret->Init(this); mOriginalCaret = mCaret; } //SetCaretEnabled(PR_TRUE); // make it show in browser windows #endif //set up selection to be displayed in document // Don't enable selection for print media nsPresContext::nsPresContextType type = aPresContext->Type(); if (type != nsPresContext::eContext_PrintPreview && type != nsPresContext::eContext_Print) SetDisplaySelection(nsISelectionController::SELECTION_DISABLED); if (gMaxRCProcessingTime == -1) { gMaxRCProcessingTime = nsContentUtils::GetIntPref("layout.reflow.timeslice", NS_MAX_REFLOW_TIME); } { nsCOMPtr os = do_GetService("@mozilla.org/observer-service;1", &result); if (os) { os->AddObserver(this, NS_LINK_VISITED_EVENT_TOPIC, PR_FALSE); os->AddObserver(this, "agent-sheet-added", PR_FALSE); os->AddObserver(this, "user-sheet-added", PR_FALSE); os->AddObserver(this, "agent-sheet-removed", PR_FALSE); os->AddObserver(this, "user-sheet-removed", PR_FALSE); #ifdef MOZ_XUL os->AddObserver(this, "chrome-flush-skin-caches", PR_FALSE); #endif #ifdef ACCESSIBILITY os->AddObserver(this, "a11y-init-or-shutdown", PR_FALSE); #endif } } // cache the drag service so we can check it during reflows mDragService = do_GetService("@mozilla.org/widget/dragservice;1"); #ifdef MOZ_REFLOW_PERF if (mReflowCountMgr) { PRBool paintFrameCounts = nsContentUtils::GetBoolPref("layout.reflow.showframecounts"); PRBool dumpFrameCounts = nsContentUtils::GetBoolPref("layout.reflow.dumpframecounts"); PRBool dumpFrameByFrameCounts = nsContentUtils::GetBoolPref("layout.reflow.dumpframebyframecounts"); mReflowCountMgr->SetDumpFrameCounts(dumpFrameCounts); mReflowCountMgr->SetDumpFrameByFrameCounts(dumpFrameByFrameCounts); mReflowCountMgr->SetPaintFrameCounts(paintFrameCounts); } #endif return NS_OK; } NS_IMETHODIMP PresShell::Destroy() { #ifdef MOZ_REFLOW_PERF DumpReflows(); if (mReflowCountMgr) { delete mReflowCountMgr; mReflowCountMgr = nsnull; } #endif if (mHaveShutDown) return NS_OK; if (mPresContext) { // We need to notify the destroying the nsPresContext to ESM for // suppressing to use from ESM. mPresContext->EventStateManager()->NotifyDestroyPresContext(mPresContext); } { nsCOMPtr os = do_GetService("@mozilla.org/observer-service;1"); if (os) { os->RemoveObserver(this, NS_LINK_VISITED_EVENT_TOPIC); os->RemoveObserver(this, "agent-sheet-added"); os->RemoveObserver(this, "user-sheet-added"); os->RemoveObserver(this, "agent-sheet-removed"); os->RemoveObserver(this, "user-sheet-removed"); #ifdef MOZ_XUL os->RemoveObserver(this, "chrome-flush-skin-caches"); #endif #ifdef ACCESSIBILITY os->RemoveObserver(this, "a11y-init-or-shutdown"); #endif } } // If our paint suppression timer is still active, kill it. if (mPaintSuppressionTimer) { mPaintSuppressionTimer->Cancel(); mPaintSuppressionTimer = nsnull; } if (mCaret) { mCaret->Terminate(); mCaret = nsnull; } // release our pref style sheet, if we have one still ClearPreferenceStyleRules(); mIsDestroying = PR_TRUE; // We can't release all the event content in // mCurrentEventContentStack here since there might be code on the // stack that will release the event content too. Double release // bad! // The frames will be torn down, so remove them from the current // event frame stack (since they'd be dangling references if we'd // leave them in) and null out the mCurrentEventFrame pointer as // well. mCurrentEventFrame = nsnull; PRInt32 i, count = mCurrentEventFrameStack.Count(); for (i = 0; i < count; i++) { mCurrentEventFrameStack.ReplaceElementAt(nsnull, i); } if (mViewManager) { // Clear the view manager's weak pointer back to |this| in case it // was leaked. mViewManager->SetViewObserver(nsnull); mViewManager = nsnull; } mStyleSet->BeginShutdown(mPresContext); // This shell must be removed from the document before the frame // hierarchy is torn down to avoid finding deleted frames through // this presshell while the frames are being torn down if (mDocument) { mDocument->DeleteShell(this); } // Revoke any pending reflow event. We need to do this and cancel // pending reflows before we destroy the frame manager, since // apparently frame destruction sometimes spins the event queue when // plug-ins are involved(!). mReflowEvent.Revoke(); CancelAllPendingReflows(); CancelPostedReflowCallbacks(); // Destroy the frame manager. This will destroy the frame hierarchy mFrameConstructor->WillDestroyFrameTree(); FrameManager()->Destroy(); NS_WARN_IF_FALSE(!mWeakFrames, "Weak frames alive after destroying FrameManager"); while (mWeakFrames) { mWeakFrames->Clear(this); } // Let the style set do its cleanup. mStyleSet->Shutdown(mPresContext); if (mPresContext) { // Clear out the prescontext's property table -- since our frame tree is // now dead, we shouldn't be looking up any more properties in that table. // We want to do this before we call SetShell() on the prescontext, so // property destructors can usefully call GetPresShell() on the // prescontext. mPresContext->PropertyTable()->DeleteAllProperties(); // We hold a reference to the pres context, and it holds a weak link back // to us. To avoid the pres context having a dangling reference, set its // pres shell to NULL mPresContext->SetShell(nsnull); // Clear the link handler (weak reference) as well mPresContext->SetLinkHandler(nsnull); } KillResizeEventTimer(); mHaveShutDown = PR_TRUE; return NS_OK; } // Dynamic stack memory allocation /* virtual */ void PresShell::PushStackMemory() { mStackArena.Push(); } /* virtual */ void PresShell::PopStackMemory() { mStackArena.Pop(); } /* virtual */ void* PresShell::AllocateStackMemory(size_t aSize) { return mStackArena.Allocate(aSize); } void PresShell::FreeFrame(size_t aSize, void* aPtr) { mFrameArena.FreeFrame(aSize, aPtr); } void* PresShell::AllocateFrame(size_t aSize) { return mFrameArena.AllocateFrame(aSize); } void nsIPresShell::SetAuthorStyleDisabled(PRBool aStyleDisabled) { if (aStyleDisabled != mStyleSet->GetAuthorStyleDisabled()) { mStyleSet->SetAuthorStyleDisabled(aStyleDisabled); ReconstructStyleData(); } } PRBool nsIPresShell::GetAuthorStyleDisabled() { return mStyleSet->GetAuthorStyleDisabled(); } NS_IMETHODIMP PresShell::SetPreferenceStyleRules(PRBool aForceReflow) { if (!mDocument) { return NS_ERROR_NULL_POINTER; } nsPIDOMWindow *window = mDocument->GetWindow(); // If the document doesn't have a window there's no need to notify // its presshell about changes to preferences since the document is // in a state where it doesn't matter any more (see // DocumentViewerImpl::Close()). if (!window) { return NS_ERROR_NULL_POINTER; } NS_PRECONDITION(mPresContext, "presContext cannot be null"); if (mPresContext) { nsresult result = NS_OK; // first, make sure this is not a chrome shell nsCOMPtr container = mPresContext->GetContainer(); if (container) { nsCOMPtr docShell(do_QueryInterface(container, &result)); if (NS_SUCCEEDED(result) && docShell){ PRInt32 docShellType; result = docShell->GetItemType(&docShellType); if (NS_SUCCEEDED(result)){ if (nsIDocShellTreeItem::typeChrome == docShellType){ return NS_OK; } } } } if (NS_SUCCEEDED(result)) { #ifdef DEBUG_attinasi printf("Setting Preference Style Rules:\n"); #endif // if here, we need to create rules for the prefs // - this includes the background-color, the text-color, // the link color, the visited link color and the link-underlining // first clear any exising rules result = ClearPreferenceStyleRules(); // now the link rules (must come after the color rules, or links will not be correct color!) // XXX - when there is both an override and agent pref stylesheet this won't matter, // as the color rules will be overrides and the links rules will be agent if (NS_SUCCEEDED(result)) { result = SetPrefLinkRules(); } if (NS_SUCCEEDED(result)) { result = SetPrefFocusRules(); } if (NS_SUCCEEDED(result)) { result = SetPrefNoScriptRule(); } if (NS_SUCCEEDED(result)) { result = SetPrefNoFramesRule(); } } #ifdef DEBUG_attinasi printf( "Preference Style Rules set: error=%ld\n", (long)result); #endif // Note that this method never needs to force any calculation; the caller // will recalculate style if needed return result; } return NS_ERROR_NULL_POINTER; } nsresult PresShell::ClearPreferenceStyleRules(void) { nsresult result = NS_OK; if (mPrefStyleSheet) { NS_ASSERTION(mStyleSet, "null styleset entirely unexpected!"); if (mStyleSet) { // remove the sheet from the styleset: // - note that we have to check for success by comparing the count before and after... #ifdef NS_DEBUG PRInt32 numBefore = mStyleSet->SheetCount(nsStyleSet::eUserSheet); NS_ASSERTION(numBefore > 0, "no user stylesheets in styleset, but we have one!"); #endif mStyleSet->RemoveStyleSheet(nsStyleSet::eUserSheet, mPrefStyleSheet); #ifdef DEBUG_attinasi NS_ASSERTION((numBefore - 1) == mStyleSet->GetNumberOfUserStyleSheets(), "Pref stylesheet was not removed"); printf("PrefStyleSheet removed\n"); #endif // clear the sheet pointer: it is strictly historical now mPrefStyleSheet = nsnull; } } return result; } nsresult PresShell::CreatePreferenceStyleSheet(void) { NS_ASSERTION(!mPrefStyleSheet, "prefStyleSheet already exists"); nsresult result; mPrefStyleSheet = do_CreateInstance(kCSSStyleSheetCID, &result); if (NS_SUCCEEDED(result)) { NS_ASSERTION(mPrefStyleSheet, "null but no error"); nsCOMPtr uri; result = NS_NewURI(getter_AddRefs(uri), "about:PreferenceStyleSheet", nsnull); if (NS_SUCCEEDED(result)) { NS_ASSERTION(uri, "null but no error"); result = mPrefStyleSheet->SetURIs(uri, uri, uri); if (NS_SUCCEEDED(result)) { mPrefStyleSheet->SetComplete(); PRUint32 index; result = mPrefStyleSheet->InsertRuleInternal(NS_LITERAL_STRING("@namespace url(http://www.w3.org/1999/xhtml);"), 0, &index); if (NS_SUCCEEDED(result)) { mStyleSet->AppendStyleSheet(nsStyleSet::eUserSheet, mPrefStyleSheet); } } } } #ifdef DEBUG_attinasi printf("CreatePrefStyleSheet completed: error=%ld\n",(long)result); #endif if (NS_FAILED(result)) { mPrefStyleSheet = nsnull; } return result; } // XXX We want these after the @namespace rule. Does order matter // for these rules, or can we call nsICSSStyleRule::StyleRuleCount() // and just "append"? static PRUint32 sInsertPrefSheetRulesAt = 1; nsresult PresShell::SetPrefNoScriptRule() { nsresult rv = NS_OK; // also handle the case where print is done from print preview // see bug #342439 for more details PRBool scriptEnabled = mDocument->IsScriptEnabled() || ((mPresContext->Type() == nsPresContext::eContext_PrintPreview || mPresContext->Type() == nsPresContext::eContext_Print) && NS_PTR_TO_INT32(mDocument->GetProperty( nsGkAtoms::scriptEnabledBeforePrintPreview))); if (scriptEnabled) { if (!mPrefStyleSheet) { rv = CreatePreferenceStyleSheet(); NS_ENSURE_SUCCESS(rv, rv); } PRUint32 index = 0; mPrefStyleSheet-> InsertRuleInternal(NS_LITERAL_STRING("noscript{display:none!important}"), sInsertPrefSheetRulesAt, &index); } return rv; } nsresult PresShell::SetPrefNoFramesRule(void) { NS_ASSERTION(mPresContext,"null prescontext not allowed"); if (!mPresContext) { return NS_ERROR_FAILURE; } nsresult rv = NS_OK; if (!mPrefStyleSheet) { rv = CreatePreferenceStyleSheet(); NS_ENSURE_SUCCESS(rv, rv); } NS_ASSERTION(mPrefStyleSheet, "prefstylesheet should not be null"); PRBool allowSubframes = PR_TRUE; nsCOMPtr container = mPresContext->GetContainer(); nsCOMPtr docShell(do_QueryInterface(container)); if (docShell) { docShell->GetAllowSubframes(&allowSubframes); } if (!allowSubframes) { PRUint32 index = 0; rv = mPrefStyleSheet-> InsertRuleInternal(NS_LITERAL_STRING("noframes{display:block}"), sInsertPrefSheetRulesAt, &index); NS_ENSURE_SUCCESS(rv, rv); rv = mPrefStyleSheet-> InsertRuleInternal(NS_LITERAL_STRING("frame, frameset, iframe {display:none!important}"), sInsertPrefSheetRulesAt, &index); } return rv; } nsresult PresShell::SetPrefLinkRules(void) { NS_ASSERTION(mPresContext,"null prescontext not allowed"); if (!mPresContext) { return NS_ERROR_FAILURE; } nsresult rv = NS_OK; if (!mPrefStyleSheet) { rv = CreatePreferenceStyleSheet(); NS_ENSURE_SUCCESS(rv, rv); } NS_ASSERTION(mPrefStyleSheet, "prefstylesheet should not be null"); // support default link colors: // this means the link colors need to be overridable, // which they are if we put them in the agent stylesheet, // though if using an override sheet this will cause authors grief still // In the agent stylesheet, they are !important when we are ignoring document colors nscolor linkColor(mPresContext->DefaultLinkColor()); nscolor activeColor(mPresContext->DefaultActiveLinkColor()); nscolor visitedColor(mPresContext->DefaultVisitedLinkColor()); NS_NAMED_LITERAL_STRING(ruleClose, "}"); PRUint32 index = 0; nsAutoString strColor; // insert a rule to color links: '*|*:link {color: #RRGGBB [!important];}' ColorToString(linkColor, strColor); rv = mPrefStyleSheet-> InsertRuleInternal(NS_LITERAL_STRING("*|*:link{color:") + strColor + ruleClose, sInsertPrefSheetRulesAt, &index); NS_ENSURE_SUCCESS(rv, rv); // - visited links: '*|*:visited {color: #RRGGBB [!important];}' ColorToString(visitedColor, strColor); rv = mPrefStyleSheet-> InsertRuleInternal(NS_LITERAL_STRING("*|*:visited{color:") + strColor + ruleClose, sInsertPrefSheetRulesAt, &index); NS_ENSURE_SUCCESS(rv, rv); // - active links: '*|*:-moz-any-link:active {color: #RRGGBB [!important];}' ColorToString(activeColor, strColor); rv = mPrefStyleSheet-> InsertRuleInternal(NS_LITERAL_STRING("*|*:-moz-any-link:active{color:") + strColor + ruleClose, sInsertPrefSheetRulesAt, &index); NS_ENSURE_SUCCESS(rv, rv); PRBool underlineLinks = mPresContext->GetCachedBoolPref(kPresContext_UnderlineLinks); if (underlineLinks) { // create a rule to make underlining happen // '*|*:-moz-any-link {text-decoration:[underline|none];}' // no need for important, we want these to be overridable // NOTE: these must go in the agent stylesheet or they cannot be // overridden by authors rv = mPrefStyleSheet-> InsertRuleInternal(NS_LITERAL_STRING("*|*:-moz-any-link{text-decoration:underline}"), sInsertPrefSheetRulesAt, &index); } else { rv = mPrefStyleSheet-> InsertRuleInternal(NS_LITERAL_STRING("*|*:-moz-any-link{text-decoration:none}"), sInsertPrefSheetRulesAt, &index); } return rv; } nsresult PresShell::SetPrefFocusRules(void) { NS_ASSERTION(mPresContext,"null prescontext not allowed"); nsresult result = NS_OK; if (!mPresContext) result = NS_ERROR_FAILURE; if (NS_SUCCEEDED(result) && !mPrefStyleSheet) result = CreatePreferenceStyleSheet(); if (NS_SUCCEEDED(result)) { NS_ASSERTION(mPrefStyleSheet, "prefstylesheet should not be null"); if (mPresContext->GetUseFocusColors()) { nscolor focusBackground(mPresContext->FocusBackgroundColor()); nscolor focusText(mPresContext->FocusTextColor()); // insert a rule to make focus the preferred color PRUint32 index = 0; nsAutoString strRule, strColor; /////////////////////////////////////////////////////////////// // - focus: '*:focus ColorToString(focusText,strColor); strRule.AppendLiteral("*:focus,*:focus>font {color: "); strRule.Append(strColor); strRule.AppendLiteral(" !important; background-color: "); ColorToString(focusBackground,strColor); strRule.Append(strColor); strRule.AppendLiteral(" !important; } "); // insert the rules result = mPrefStyleSheet-> InsertRuleInternal(strRule, sInsertPrefSheetRulesAt, &index); } PRUint8 focusRingWidth = mPresContext->FocusRingWidth(); PRBool focusRingOnAnything = mPresContext->GetFocusRingOnAnything(); if ((NS_SUCCEEDED(result) && focusRingWidth != 1 && focusRingWidth <= 4 ) || focusRingOnAnything) { PRUint32 index = 0; nsAutoString strRule; if (!focusRingOnAnything) strRule.AppendLiteral("*|*:link:focus, *|*:visited"); // If we only want focus rings on the normal things like links strRule.AppendLiteral(":focus {outline: "); // For example 3px dotted WindowText (maximum 4) strRule.AppendInt(focusRingWidth); strRule.AppendLiteral("px dotted WindowText !important; } "); // For example 3px dotted WindowText // insert the rules result = mPrefStyleSheet-> InsertRuleInternal(strRule, sInsertPrefSheetRulesAt, &index); NS_ENSURE_SUCCESS(result, result); if (focusRingWidth != 1) { // If the focus ring width is different from the default, fix buttons with rings strRule.AssignLiteral("button::-moz-focus-inner, input[type=\"reset\"]::-moz-focus-inner,"); strRule.AppendLiteral("input[type=\"button\"]::-moz-focus-inner, "); strRule.AppendLiteral("input[type=\"submit\"]::-moz-focus-inner { padding: 1px 2px 1px 2px; border: "); strRule.AppendInt(focusRingWidth); strRule.AppendLiteral("px dotted transparent !important; } "); result = mPrefStyleSheet-> InsertRuleInternal(strRule, sInsertPrefSheetRulesAt, &index); NS_ENSURE_SUCCESS(result, result); strRule.AssignLiteral("button:focus::-moz-focus-inner, input[type=\"reset\"]:focus::-moz-focus-inner,"); strRule.AppendLiteral("input[type=\"button\"]:focus::-moz-focus-inner, input[type=\"submit\"]:focus::-moz-focus-inner {"); strRule.AppendLiteral("border-color: ButtonText !important; }"); result = mPrefStyleSheet-> InsertRuleInternal(strRule, sInsertPrefSheetRulesAt, &index); } } } return result; } void PresShell::AddUserSheet(nsISupports* aSheet) { // Make sure this does what DocumentViewerImpl::CreateStyleSet does wrt // ordering. We want this new sheet to come after all the existing stylesheet // service sheets, but before other user sheets; see nsIStyleSheetService.idl // for the ordering. Just remove and readd all the nsStyleSheetService // sheets. nsCOMPtr dummy = do_GetService(NS_STYLESHEETSERVICE_CONTRACTID); mStyleSet->BeginUpdate(); nsStyleSheetService *sheetService = nsStyleSheetService::gInstance; nsCOMArray & userSheets = *sheetService->UserStyleSheets(); PRInt32 i; // Iterate forwards when removing so the searches for RemoveStyleSheet are as // short as possible. for (i = 0; i < userSheets.Count(); ++i) { mStyleSet->RemoveStyleSheet(nsStyleSet::eUserSheet, userSheets[i]); } // Now iterate backwards, so that the order of userSheets will be the same as // the order of sheets from it in the style set. for (i = userSheets.Count() - 1; i >= 0; --i) { mStyleSet->PrependStyleSheet(nsStyleSet::eUserSheet, userSheets[i]); } mStyleSet->EndUpdate(); ReconstructStyleData(); } void PresShell::AddAgentSheet(nsISupports* aSheet) { // Make sure this does what DocumentViewerImpl::CreateStyleSet does // wrt ordering. nsCOMPtr sheet = do_QueryInterface(aSheet); if (!sheet) { return; } mStyleSet->AppendStyleSheet(nsStyleSet::eAgentSheet, sheet); ReconstructStyleData(); } void PresShell::RemoveSheet(nsStyleSet::sheetType aType, nsISupports* aSheet) { nsCOMPtr sheet = do_QueryInterface(aSheet); if (!sheet) { return; } mStyleSet->RemoveStyleSheet(aType, sheet); ReconstructStyleData(); } NS_IMETHODIMP PresShell::SetDisplaySelection(PRInt16 aToggle) { mSelection->SetDisplaySelection(aToggle); return NS_OK; } NS_IMETHODIMP PresShell::GetDisplaySelection(PRInt16 *aToggle) { *aToggle = mSelection->GetDisplaySelection(); return NS_OK; } NS_IMETHODIMP PresShell::GetSelection(SelectionType aType, nsISelection **aSelection) { if (!aSelection || !mSelection) return NS_ERROR_NULL_POINTER; *aSelection = mSelection->GetSelection(aType); if (!(*aSelection)) return NS_ERROR_INVALID_ARG; NS_ADDREF(*aSelection); return NS_OK; } nsISelection* PresShell::GetCurrentSelection(SelectionType aType) { if (!mSelection) return nsnull; return mSelection->GetSelection(aType); } NS_IMETHODIMP PresShell::ScrollSelectionIntoView(SelectionType aType, SelectionRegion aRegion, PRBool aIsSynchronous) { if (!mSelection) return NS_ERROR_NULL_POINTER; return mSelection->ScrollSelectionIntoView(aType, aRegion, aIsSynchronous); } NS_IMETHODIMP PresShell::RepaintSelection(SelectionType aType) { if (!mSelection) return NS_ERROR_NULL_POINTER; return mSelection->RepaintSelection(aType); } // Make shell be a document observer NS_IMETHODIMP PresShell::BeginObservingDocument() { if (mDocument && !mIsDestroying) { mDocument->AddObserver(this); if (mIsDocumentGone) { NS_WARNING("Adding a presshell that was disconnected from the document " "as a document observer? Sounds wrong..."); mIsDocumentGone = PR_FALSE; } } return NS_OK; } // Make shell stop being a document observer NS_IMETHODIMP PresShell::EndObservingDocument() { // XXXbz do we need to tell the frame constructor that the document // is gone, perhaps? Except for printing it's NOT gone, sometimes. mIsDocumentGone = PR_TRUE; if (mDocument) { mDocument->RemoveObserver(this); } return NS_OK; } #ifdef DEBUG_kipp char* nsPresShell_ReflowStackPointerTop; #endif static void CheckForFocus(nsPIDOMWindow* aOurWindow, nsIFocusController* aFocusController, nsIDocument* aDocument) { NS_ASSERTION(aOurWindow->IsOuterWindow(), "Uh, our window has to be an outer window!"); // Now that we have a root frame, we can set focus on the presshell. // We do this only if our DOM window is currently focused or is an // an ancestor of a previously focused window. if (!aFocusController) return; nsCOMPtr ourWin = do_QueryInterface(aOurWindow); nsCOMPtr focusedWindow; aFocusController->GetFocusedWindow(getter_AddRefs(focusedWindow)); if (!focusedWindow) { // This should never really happen, but if it does, assume // we can focus ourself to keep the window from being keydead. focusedWindow = ourWin; } // Walk up the document chain, starting with focusedWindow's document. // We stop walking when we find a document that has a null DOMWindow // (meaning that the DOMWindow has a new document now) or find ourWin // as the document's window. We also stop if we hit aDocument, since // that means there is a child document which loaded before us that's // already been given focus. nsCOMPtr focusedDOMDoc; focusedWindow->GetDocument(getter_AddRefs(focusedDOMDoc)); nsCOMPtr curDoc = do_QueryInterface(focusedDOMDoc); if (!curDoc) { // This can happen if the previously focused DOM window has been // unhooked from its document during document teardown. We don't // really have any other information to help us determine where // focusedWindow fits into the DOM window hierarchy. For now, we'll // go ahead and allow this window to take focus, so that something // ends up focused. curDoc = aDocument; } while (curDoc) { nsPIDOMWindow *curWin = curDoc->GetWindow(); if (!curWin || curWin == ourWin) break; curDoc = curDoc->GetParentDocument(); if (curDoc == aDocument) return; } if (!curDoc) { // We reached the top of the document chain, and did not encounter ourWin // or a windowless document. So, focus should be unaffected by this // document load. return; } PRBool active; aFocusController->GetActive(&active); if (active) ourWin->Focus(); // We need to ensure that the focus controller is updated, since it may be // suppressed when this function is called. aFocusController->SetFocusedWindow(ourWin); } NS_IMETHODIMP PresShell::GetDidInitialReflow(PRBool *aDidInitialReflow) { if (!aDidInitialReflow) return NS_ERROR_FAILURE; *aDidInitialReflow = mDidInitialReflow; return NS_OK; } NS_IMETHODIMP PresShell::InitialReflow(nscoord aWidth, nscoord aHeight) { if (mIsDestroying) { return NS_OK; } nsCOMPtr kungFuDeathGrip(this); mDidInitialReflow = PR_TRUE; #ifdef NS_DEBUG if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) { if (mDocument) { nsIURI *uri = mDocument->GetDocumentURI(); if (uri) { nsCAutoString url; uri->GetSpec(url); printf("*** PresShell::InitialReflow (this=%p, url='%s')\n", (void*)this, url.get()); } } } #endif if (mCaret) mCaret->EraseCaret(); // XXX Do a full invalidate at the beginning so that invalidates along // the way don't have region accumulation issues? mPresContext->SetVisibleArea(nsRect(0, 0, aWidth, aHeight)); nsIContent *root = mDocument ? mDocument->GetRootContent() : nsnull; // Get the root frame from the frame manager nsIFrame* rootFrame = FrameManager()->GetRootFrame(); if (root) { MOZ_TIMER_DEBUGLOG(("Reset and start: Frame Creation: PresShell::InitialReflow(), this=%p\n", (void*)this)); MOZ_TIMER_RESET(mFrameCreationWatch); MOZ_TIMER_START(mFrameCreationWatch); WillCauseReflow(); mFrameConstructor->BeginUpdate(); if (!rootFrame) { // Have style sheet processor construct a frame for the // precursors to the root content object's frame mFrameConstructor->ConstructRootFrame(root, &rootFrame); FrameManager()->SetRootFrame(rootFrame); } // Have the style sheet processor construct frame for the root // content object down mFrameConstructor->ContentInserted(nsnull, root, 0, nsnull); VERIFY_STYLE_TREE; MOZ_TIMER_DEBUGLOG(("Stop: Frame Creation: PresShell::InitialReflow(), this=%p\n", (void*)this)); MOZ_TIMER_STOP(mFrameCreationWatch); // Something in mFrameConstructor->ContentInserted may have caused // Destroy() to get called, bug 337586. NS_ENSURE_STATE(!mHaveShutDown); mFrameConstructor->EndUpdate(); DidCauseReflow(); // Run the XBL binding constructors for any new frames we've constructed mDocument->BindingManager()->ProcessAttachedQueue(); // Constructors may have killed us too NS_ENSURE_STATE(!mHaveShutDown); // Now flush out pending restyles before we actually reflow, in // case XBL constructors changed styles somewhere. mFrameConstructor->ProcessPendingRestyles(); // And that might have run _more_ XBL constructors NS_ENSURE_STATE(!mHaveShutDown); // Now reget the root frame, since all that script might have affected it // somehow. Currently that can't happen, as long as mHaveShutDown is // false, but let's not rely on that. rootFrame = FrameManager()->GetRootFrame(); } if (rootFrame) { // Note: Because the frame just got created, it has the NS_FRAME_IS_DIRTY // bit set. Unset it so that FrameNeedsReflow() will work right. NS_ASSERTION(mDirtyRoots.IndexOf(rootFrame) == -1, "Why is the root in mDirtyRoots already?"); rootFrame->RemoveStateBits(NS_FRAME_IS_DIRTY | NS_FRAME_HAS_DIRTY_CHILDREN); FrameNeedsReflow(rootFrame, eResize, NS_FRAME_IS_DIRTY); NS_ASSERTION(mDirtyRoots.IndexOf(rootFrame) != -1, "Should be in mDirtyRoots now"); NS_ASSERTION(mReflowEvent.IsPending(), "Why no reflow event pending?"); } // Restore our root scroll position now if we're getting here after EndLoad // got called, since this is our one chance to do it. Note that we need not // have reflowed for this to work; when the scrollframe is finally reflowed // it'll puick up the position we store in it here. if (!mDocumentLoading) { RestoreRootScrollPosition(); } // For printing, we just immediately unsuppress. if (!mPresContext->IsPaginated()) { // Kick off a one-shot timer based off our pref value. When this timer // fires, if painting is still locked down, then we will go ahead and // trigger a full invalidate and allow painting to proceed normally. mPaintingSuppressed = PR_TRUE; mPaintSuppressionTimer = do_CreateInstance("@mozilla.org/timer;1"); if (!mPaintSuppressionTimer) // Uh-oh. We must be out of memory. No point in keeping painting locked down. mPaintingSuppressed = PR_FALSE; else { // Initialize the timer. // Default to PAINTLOCK_EVENT_DELAY if we can't get the pref value. PRInt32 delay = nsContentUtils::GetIntPref("nglayout.initialpaint.delay", PAINTLOCK_EVENT_DELAY); mPaintSuppressionTimer->InitWithFuncCallback(sPaintSuppressionCallback, this, delay, nsITimer::TYPE_ONE_SHOT); } } return NS_OK; //XXX this needs to be real. MMP } void PresShell::sPaintSuppressionCallback(nsITimer *aTimer, void* aPresShell) { PresShell* self = static_cast(aPresShell); if (self) self->UnsuppressPainting(); } NS_IMETHODIMP PresShell::ResizeReflow(nscoord aWidth, nscoord aHeight) { NS_PRECONDITION(!mIsReflowing, "Shouldn't be in reflow here!"); // If we don't have a root frame yet, that means we haven't had our initial // reflow... If that's the case, and aWidth or aHeight is unconstrained, // ignore them altogether. nsIFrame* rootFrame = FrameManager()->GetRootFrame(); if (!rootFrame && (aWidth == NS_UNCONSTRAINEDSIZE || aHeight == NS_UNCONSTRAINEDSIZE)) { return NS_ERROR_NOT_AVAILABLE; } mPresContext->SetVisibleArea(nsRect(0, 0, aWidth, aHeight)); // There isn't anything useful we can do if the initial reflow hasn't happened if (!rootFrame) return NS_OK; if (!GetPresContext()->SupressingResizeReflow()) { NS_ASSERTION(mViewManager, "Must have view manager"); nsCOMPtr viewManagerDeathGrip = mViewManager; nsIViewManager::UpdateViewBatch batch(mViewManager); // Take this ref after viewManager so it'll make sure to go away first nsCOMPtr kungFuDeathGrip(this); // Make sure style is up to date mFrameConstructor->ProcessPendingRestyles(); if (!mIsDestroying) { // XXX Do a full invalidate at the beginning so that invalidates along // the way don't have region accumulation issues? WillCauseReflow(); WillDoReflow(); { // Kick off a top-down reflow AUTO_LAYOUT_PHASE_ENTRY_POINT(GetPresContext(), Reflow); mIsReflowing = PR_TRUE; mDirtyRoots.RemoveElement(rootFrame); DoReflow(rootFrame); mIsReflowing = PR_FALSE; } DidCauseReflow(); DidDoReflow(); } batch.EndUpdateViewBatch(NS_VMREFRESH_NO_SYNC); } if (!mIsDestroying) { CreateResizeEventTimer(); } return NS_OK; //XXX this needs to be real. MMP } #define RESIZE_EVENT_DELAY 200 void PresShell::CreateResizeEventTimer () { KillResizeEventTimer(); if (mIsDocumentGone) return; mResizeEventTimer = do_CreateInstance("@mozilla.org/timer;1"); if (mResizeEventTimer) { mResizeEventTimer->InitWithFuncCallback(sResizeEventCallback, this, RESIZE_EVENT_DELAY, nsITimer::TYPE_ONE_SHOT); } } void PresShell::KillResizeEventTimer() { if(mResizeEventTimer) { mResizeEventTimer->Cancel(); mResizeEventTimer = nsnull; } } void PresShell::sResizeEventCallback(nsITimer *aTimer, void* aPresShell) { PresShell* self = static_cast(aPresShell); if (self) { self->FireResizeEvent(); } } void PresShell::FireResizeEvent() { if (mIsDocumentGone) return; //Send resize event from here. nsEvent event(PR_TRUE, NS_RESIZE_EVENT); nsEventStatus status = nsEventStatus_eIgnore; nsPIDOMWindow *window = mDocument->GetWindow(); if (window) { nsEventDispatcher::Dispatch(window, mPresContext, &event, nsnull, &status); } } NS_IMETHODIMP PresShell::SetIgnoreFrameDestruction(PRBool aIgnore) { mIgnoreFrameDestruction = aIgnore; return NS_OK; } NS_IMETHODIMP PresShell::NotifyDestroyingFrame(nsIFrame* aFrame) { if (!mIgnoreFrameDestruction) { mFrameConstructor->NotifyDestroyingFrame(aFrame); for (PRInt32 idx = mDirtyRoots.Count(); idx; ) { --idx; if (mDirtyRoots[idx] == aFrame) { mDirtyRoots.RemoveElementAt(idx); } } // Notify the frame manager FrameManager()->NotifyDestroyingFrame(aFrame); // Remove frame properties mPresContext->PropertyTable()->DeleteAllPropertiesFor(aFrame); } return NS_OK; } // note that this can return a null caret, but NS_OK NS_IMETHODIMP PresShell::GetCaret(nsICaret **outCaret) { NS_ENSURE_ARG_POINTER(outCaret); *outCaret = mCaret; NS_IF_ADDREF(*outCaret); return NS_OK; } NS_IMETHODIMP_(void) PresShell::MaybeInvalidateCaretPosition() { if (mCaret) { mCaret->InvalidateOutsideCaret(); } } void PresShell::SetCaret(nsICaret *aNewCaret) { mCaret = aNewCaret; } void PresShell::RestoreCaret() { mCaret = mOriginalCaret; } NS_IMETHODIMP PresShell::SetCaretEnabled(PRBool aInEnable) { nsresult result = NS_OK; PRBool oldEnabled = mCaretEnabled; mCaretEnabled = aInEnable; if (mCaret && (mCaretEnabled != oldEnabled)) { /* Don't change the caret's selection here! This was an evil side-effect of SetCaretEnabled() nsCOMPtr domSel; if (NS_SUCCEEDED(GetSelection(nsISelectionController::SELECTION_NORMAL, getter_AddRefs(domSel))) && domSel) mCaret->SetCaretDOMSelection(domSel); */ result = mCaret->SetCaretVisible(mCaretEnabled); } return result; } NS_IMETHODIMP PresShell::SetCaretReadOnly(PRBool aReadOnly) { if (mCaret) mCaret->SetCaretReadOnly(aReadOnly); return NS_OK; } NS_IMETHODIMP PresShell::GetCaretEnabled(PRBool *aOutEnabled) { NS_ENSURE_ARG_POINTER(aOutEnabled); *aOutEnabled = mCaretEnabled; return NS_OK; } NS_IMETHODIMP PresShell::SetCaretVisibilityDuringSelection(PRBool aVisibility) { if (mCaret) mCaret->SetVisibilityDuringSelection(aVisibility); return NS_OK; } NS_IMETHODIMP PresShell::SetSelectionFlags(PRInt16 aInEnable) { mSelectionFlags = aInEnable; return NS_OK; } NS_IMETHODIMP PresShell::GetSelectionFlags(PRInt16 *aOutEnable) { if (!aOutEnable) return NS_ERROR_INVALID_ARG; *aOutEnable = mSelectionFlags; return NS_OK; } //implementation of nsISelectionController NS_IMETHODIMP PresShell::CharacterMove(PRBool aForward, PRBool aExtend) { return mSelection->CharacterMove(aForward, aExtend); } NS_IMETHODIMP PresShell::WordMove(PRBool aForward, PRBool aExtend) { return mSelection->WordMove(aForward, aExtend); } NS_IMETHODIMP PresShell::WordExtendForDelete(PRBool aForward) { return mSelection->WordExtendForDelete(aForward); } NS_IMETHODIMP PresShell::LineMove(PRBool aForward, PRBool aExtend) { nsresult result = mSelection->LineMove(aForward, aExtend); // if we can't go down/up any more we must then move caret completely to // end/beginning respectively. if (NS_FAILED(result)) result = CompleteMove(aForward,aExtend); return result; } NS_IMETHODIMP PresShell::IntraLineMove(PRBool aForward, PRBool aExtend) { return mSelection->IntraLineMove(aForward, aExtend); } NS_IMETHODIMP PresShell::PageMove(PRBool aForward, PRBool aExtend) { nsresult result; nsIViewManager* viewManager = GetViewManager(); nsIScrollableView *scrollableView; if (!viewManager) return NS_ERROR_UNEXPECTED; result = viewManager->GetRootScrollableView(&scrollableView); if (NS_FAILED(result)) return result; if (!scrollableView) return NS_ERROR_UNEXPECTED; nsIView *scrolledView; result = scrollableView->GetScrolledView(scrolledView); mSelection->CommonPageMove(aForward, aExtend, scrollableView); // do ScrollSelectionIntoView() return ScrollSelectionIntoView(nsISelectionController::SELECTION_NORMAL, nsISelectionController::SELECTION_FOCUS_REGION, PR_TRUE); } NS_IMETHODIMP PresShell::ScrollPage(PRBool aForward) { nsIScrollableView* scrollView = GetViewToScroll(nsLayoutUtils::eVertical); if (scrollView) { scrollView->ScrollByPages(0, aForward ? 1 : -1); } return NS_OK; } NS_IMETHODIMP PresShell::ScrollLine(PRBool aForward) { nsIScrollableView* scrollView = GetViewToScroll(nsLayoutUtils::eVertical); if (scrollView) { #ifdef MOZ_WIDGET_COCOA // Emulate the Mac IE behavior of scrolling a minimum of 2 lines // rather than 1. This vastly improves scrolling speed. scrollView->ScrollByLines(0, aForward ? 2 : -2); #else scrollView->ScrollByLines(0, aForward ? 1 : -1); #endif //NEW FOR LINES // force the update to happen now, otherwise multiple scrolls can // occur before the update is processed. (bug #7354) // I'd use Composite here, but it doesn't always work. // vm->Composite(); nsIViewManager* viewManager = GetViewManager(); if (viewManager) { viewManager->ForceUpdate(); } } return NS_OK; } NS_IMETHODIMP PresShell::ScrollHorizontal(PRBool aLeft) { nsIScrollableView* scrollView = GetViewToScroll(nsLayoutUtils::eHorizontal); if (scrollView) { scrollView->ScrollByLines(aLeft ? -1 : 1, 0); //NEW FOR LINES // force the update to happen now, otherwise multiple scrolls can // occur before the update is processed. (bug #7354) // I'd use Composite here, but it doesn't always work. // vm->Composite(); nsIViewManager* viewManager = GetViewManager(); if (viewManager) { viewManager->ForceUpdate(); } } return NS_OK; } NS_IMETHODIMP PresShell::CompleteScroll(PRBool aForward) { nsIScrollableView* scrollView = GetViewToScroll(nsLayoutUtils::eVertical); if (scrollView) { scrollView->ScrollByWhole(!aForward);//TRUE = top, aForward TRUE=bottom } return NS_OK; } NS_IMETHODIMP PresShell::CompleteMove(PRBool aForward, PRBool aExtend) { return CompleteMoveInner(aForward, aExtend, PR_TRUE); } nsresult PresShell::CompleteMoveInner(PRBool aForward, PRBool aExtend, PRBool aScrollIntoView) { nsIContent* root = mSelection->GetAncestorLimiter(); nsIDocument* doc; if (root && (doc = root->GetOwnerDoc()) && doc->GetRootContent() != root) { // Make the caret be either at the very beginning (0) or the very end of // root. Only do this when not moving to the beginning or end of the // document (root is null or root is the documentElement), that's handled // below by moving to beginning or end of the scrollable view. nsIContent* node = root; PRInt32 offset = 0; nsFrameSelection::HINT hint = nsFrameSelection::HINTLEFT; if (aForward) { nsIContent* next = node; PRUint32 count; while ((count = next->GetChildCount()) > 0) { node = next; offset = count; next = next->GetChildAt(count - 1); } if (offset > 0 && node->GetChildAt(offset - 1)->Tag() == nsGkAtoms::br) { --offset; hint = nsFrameSelection::HINTRIGHT; // for bug 106855 } } mSelection->HandleClick(node, offset, offset, aExtend, PR_FALSE, hint); // HandleClick resets ancestorLimiter, so set it again. mSelection->SetAncestorLimiter(root); if (aScrollIntoView) { return ScrollSelectionIntoView(nsISelectionController::SELECTION_NORMAL, nsISelectionController::SELECTION_FOCUS_REGION, PR_TRUE); } return NS_OK; } nsIScrollableView *scrollableView; if (!mViewManager) return NS_ERROR_UNEXPECTED; nsresult result = mViewManager->GetRootScrollableView(&scrollableView); if (NS_FAILED(result)) return result; if (!scrollableView) return NS_ERROR_UNEXPECTED; nsIView *scrolledView; result = scrollableView->GetScrolledView(scrolledView); // get a frame nsIFrame *frame = (nsIFrame*)scrolledView->GetClientData(); if (!frame) return NS_ERROR_FAILURE; //we need to get to the area frame. nsIAtom* frameType; do { frameType = frame->GetType(); if (frameType != nsGkAtoms::areaFrame) { frame = frame->GetFirstChild(nsnull); if (!frame) break; } }while(frameType != nsGkAtoms::areaFrame); if (!frame) return NS_ERROR_FAILURE; //could not find an area frame. nsPeekOffsetStruct pos = frame->GetExtremeCaretPosition(!aForward); mSelection->HandleClick(pos.mResultContent ,pos.mContentOffset ,pos.mContentOffset/*End*/ ,aExtend, PR_FALSE, aForward); if (aScrollIntoView) { result = ScrollSelectionIntoView(nsISelectionController::SELECTION_NORMAL, nsISelectionController::SELECTION_FOCUS_REGION, PR_TRUE); if (NS_FAILED(result)) return result; } return NS_OK; } NS_IMETHODIMP PresShell::SelectAll() { return mSelection->SelectAll(); } NS_IMETHODIMP PresShell::CheckVisibility(nsIDOMNode *node, PRInt16 startOffset, PRInt16 EndOffset, PRBool *_retval) { if (!node || startOffset>EndOffset || !_retval || startOffset<0 || EndOffset<0) return NS_ERROR_INVALID_ARG; *_retval = PR_FALSE; //initialize return parameter nsCOMPtr content(do_QueryInterface(node)); if (!content) return NS_ERROR_FAILURE; nsIFrame *frame = GetPrimaryFrameFor(content); if (!frame) //no frame to look at so it must not be visible return NS_OK; //start process now to go through all frames to find startOffset. then check chars after that to see //if anything until EndOffset is visible. PRBool finished = PR_FALSE; frame->CheckVisibility(mPresContext,startOffset,EndOffset,PR_TRUE,&finished, _retval); return NS_OK;//dont worry about other return val } //end implementations nsISelectionController NS_IMETHODIMP PresShell::StyleChangeReflow() { nsIFrame* rootFrame = FrameManager()->GetRootFrame(); // At the moment at least, we don't have a root frame before the initial // reflow; it's safe to just ignore the request in that case if (!rootFrame) return NS_OK; return FrameNeedsReflow(rootFrame, eStyleChange, NS_FRAME_IS_DIRTY); } nsIFrame* nsIPresShell::GetRootFrame() const { return FrameManager()->GetRootFrame(); } nsIFrame* nsIPresShell::GetRootScrollFrame() const { nsIFrame* rootFrame = FrameManager()->GetRootFrame(); // Ensure root frame is a viewport frame if (!rootFrame || nsGkAtoms::viewportFrame != rootFrame->GetType()) return nsnull; nsIFrame* theFrame = rootFrame->GetFirstChild(nsnull); if (!theFrame || nsGkAtoms::scrollFrame != theFrame->GetType()) return nsnull; return theFrame; } nsIScrollableFrame* nsIPresShell::GetRootScrollFrameAsScrollable() const { nsIFrame* frame = GetRootScrollFrame(); if (!frame) return nsnull; nsIScrollableFrame* scrollableFrame = nsnull; CallQueryInterface(frame, &scrollableFrame); NS_ASSERTION(scrollableFrame, "All scroll frames must implement nsIScrollableFrame"); return scrollableFrame; } NS_IMETHODIMP PresShell::GetPageSequenceFrame(nsIPageSequenceFrame** aResult) const { NS_PRECONDITION(nsnull != aResult, "null ptr"); if (nsnull == aResult) { return NS_ERROR_NULL_POINTER; } *aResult = nsnull; nsIFrame* frame = mFrameConstructor->GetPageSequenceFrame(); if (frame) { CallQueryInterface(frame, aResult); } return *aResult ? NS_OK : NS_ERROR_FAILURE; } nsIFrame* PresShell::GetFrameForPoint(nsIFrame* aFrame, nsPoint aPt) { return nsLayoutUtils::GetFrameForPoint(aFrame, aPt); } void PresShell::BeginUpdate(nsIDocument *aDocument, nsUpdateType aUpdateType) { #ifdef DEBUG mUpdateCount++; #endif mFrameConstructor->BeginUpdate(); if (aUpdateType & UPDATE_STYLE) mStyleSet->BeginUpdate(); } void PresShell::EndUpdate(nsIDocument *aDocument, nsUpdateType aUpdateType) { #ifdef DEBUG NS_PRECONDITION(0 != mUpdateCount, "too many EndUpdate's"); --mUpdateCount; #endif if (aUpdateType & UPDATE_STYLE) { mStyleSet->EndUpdate(); if (mStylesHaveChanged) ReconstructStyleData(); } mFrameConstructor->EndUpdate(); } void PresShell::RestoreRootScrollPosition() { // Restore frame state for the root scroll frame nsCOMPtr historyState = mDocument->GetLayoutHistoryState(); // Make sure we don't reenter reflow via the sync paint that happens while // we're scrolling to our restored position. Entering reflow for the // scrollable frame will cause it to reenter ScrollToRestoredPosition(), and // it'll get all confused. ++mChangeNestCount; if (historyState) { nsIFrame* scrollFrame = GetRootScrollFrame(); if (scrollFrame) { nsIScrollableFrame* scrollableFrame; CallQueryInterface(scrollFrame, &scrollableFrame); if (scrollableFrame) { FrameManager()->RestoreFrameStateFor(scrollFrame, historyState, nsIStatefulFrame::eDocumentScrollState); scrollableFrame->ScrollToRestoredPosition(); } } } --mChangeNestCount; } void PresShell::BeginLoad(nsIDocument *aDocument) { #ifdef MOZ_PERF_METRICS // Reset style resolution stopwatch maintained by style set MOZ_TIMER_DEBUGLOG(("Reset: Style Resolution: PresShell::BeginLoad(), this=%p\n", (void*)this)); #endif mDocumentLoading = PR_TRUE; } void PresShell::EndLoad(nsIDocument *aDocument) { NS_PRECONDITION(aDocument == mDocument, "Wrong document"); RestoreRootScrollPosition(); #ifdef MOZ_PERF_METRICS // Dump reflow, style resolution and frame construction times here. MOZ_TIMER_DEBUGLOG(("Stop: Reflow: PresShell::EndLoad(), this=%p\n", this)); MOZ_TIMER_STOP(mReflowWatch); MOZ_TIMER_LOG(("Reflow time (this=%p): ", this)); MOZ_TIMER_PRINT(mReflowWatch); MOZ_TIMER_DEBUGLOG(("Stop: Frame Creation: PresShell::EndLoad(), this=%p\n", this)); MOZ_TIMER_STOP(mFrameCreationWatch); MOZ_TIMER_LOG(("Frame construction plus style resolution time (this=%p): ", this)); MOZ_TIMER_PRINT(mFrameCreationWatch); // Print style resolution stopwatch maintained by style set MOZ_TIMER_DEBUGLOG(("Stop: Style Resolution: PresShell::EndLoad(), this=%p\n", this)); #endif mDocumentLoading = PR_FALSE; } #ifdef DEBUG void PresShell::VerifyHasDirtyRootAncestor(nsIFrame* aFrame) { // XXXbz due to bug 372769, can't actually assert anything here... return; // XXXbz shouldn't need this part; remove it once FrameNeedsReflow // handles the root frame correctly. if (!aFrame->GetParent()) { return; } // Make sure that there is a reflow root ancestor of |aFrame| that's // in mDirtyRoots already. while (aFrame && (aFrame->GetStateBits() & NS_FRAME_HAS_DIRTY_CHILDREN)) { if (((aFrame->GetStateBits() & NS_FRAME_REFLOW_ROOT) || !aFrame->GetParent()) && mDirtyRoots.IndexOf(aFrame) != -1) { return; } aFrame = aFrame->GetParent(); } NS_NOTREACHED("Frame has dirty bits set but isn't scheduled to be " "reflowed?"); } #endif NS_IMETHODIMP PresShell::FrameNeedsReflow(nsIFrame *aFrame, IntrinsicDirty aIntrinsicDirty, nsFrameState aBitToAdd) { NS_PRECONDITION(aBitToAdd == NS_FRAME_IS_DIRTY || aBitToAdd == NS_FRAME_HAS_DIRTY_CHILDREN, "Unexpected bits being added"); NS_ASSERTION(!mIsReflowing, "can't mark frame dirty during reflow"); // If we've not yet done the initial reflow, then don't bother // enqueuing a reflow command yet. if (! mDidInitialReflow) return NS_OK; // If we're already destroying, don't bother with this either. if (mIsDestroying) return NS_OK; #ifdef DEBUG //printf("gShellCounter: %d\n", gShellCounter++); if (mInVerifyReflow) { return NS_OK; } if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) { printf("\nPresShell@%p: frame %p needs reflow\n", (void*)this, (void*)aFrame); if (VERIFY_REFLOW_REALLY_NOISY_RC & gVerifyReflowFlags) { printf("Current content model:\n"); nsIContent *rootContent = mDocument->GetRootContent(); if (rootContent) { rootContent->List(stdout, 0); } } } #endif // Grab |wasDirty| now so we can go ahead and update the bits on aFrame. PRBool wasDirty = NS_SUBTREE_DIRTY(aFrame); aFrame->AddStateBits(aBitToAdd); // Now if aFrame is a reflow root we can cut off this reflow at it if the bit // being added is NS_FRAME_HAS_DIRTY_CHILDREN. PRBool targetFrameDirty = (aBitToAdd == NS_FRAME_IS_DIRTY); #define FRAME_IS_REFLOW_ROOT(_f) \ ((_f->GetStateBits() & NS_FRAME_REFLOW_ROOT) && \ (_f != aFrame || !targetFrameDirty)) // Mark the intrinsic widths as dirty on the frame, all of its ancestors, // and all of its descendants, if needed: if (aIntrinsicDirty != eResize) { // Mark argument and all ancestors dirty. (Unless we hit a reflow root that // should contain the reflow. That root could be aFrame itself if it's not // dirty, or it could be some ancestor of aFrame.) for (nsIFrame *a = aFrame; a && !FRAME_IS_REFLOW_ROOT(a); a = a->GetParent()) a->MarkIntrinsicWidthsDirty(); } if (aIntrinsicDirty == eStyleChange) { // Mark all descendants dirty (using an nsVoidArray stack rather than // recursion). nsVoidArray stack; stack.AppendElement(aFrame); while (stack.Count() != 0) { nsIFrame *f = static_cast(stack.FastElementAt(stack.Count() - 1)); stack.RemoveElementAt(stack.Count() - 1); PRInt32 childListIndex = 0; nsIAtom *childListName; do { childListName = f->GetAdditionalChildListName(childListIndex++); for (nsIFrame *kid = f->GetFirstChild(childListName); kid; kid = kid->GetNextSibling()) { kid->MarkIntrinsicWidthsDirty(); stack.AppendElement(kid); } } while (childListName); } } // Set NS_FRAME_HAS_DIRTY_CHILDREN bits (via nsIFrame::ChildIsDirty) up the // tree until we reach either a frame that's already dirty or a reflow root. nsIFrame *f = aFrame; for (;;) { if (FRAME_IS_REFLOW_ROOT(f) || !f->GetParent()) { // we've hit a reflow root or the root frame if (!wasDirty) { mDirtyRoots.AppendElement(f); } #ifdef DEBUG else { VerifyHasDirtyRootAncestor(f); } #endif break; } nsIFrame *child = f; f = f->GetParent(); wasDirty = NS_SUBTREE_DIRTY(f); f->ChildIsDirty(child); NS_ASSERTION(f->GetStateBits() & NS_FRAME_HAS_DIRTY_CHILDREN, "ChildIsDirty didn't do its job"); if (wasDirty) { // This frame was already marked dirty. #ifdef DEBUG VerifyHasDirtyRootAncestor(f); #endif break; } } PostReflowEvent(); return NS_OK; } nsIScrollableView* PresShell::GetViewToScroll(nsLayoutUtils::Direction aDirection) { nsCOMPtr esm = mPresContext->EventStateManager(); nsIScrollableView* scrollView = nsnull; nsCOMPtr focusedContent; esm->GetFocusedContent(getter_AddRefs(focusedContent)); if (!focusedContent && mSelection) { nsISelection* domSelection = mSelection-> GetSelection(nsISelectionController::SELECTION_NORMAL); if (domSelection) { nsCOMPtr focusedNode; domSelection->GetFocusNode(getter_AddRefs(focusedNode)); focusedContent = do_QueryInterface(focusedNode); } } if (focusedContent) { nsIFrame* startFrame = GetPrimaryFrameFor(focusedContent); if (startFrame) { nsIScrollableViewProvider* svp; CallQueryInterface(startFrame, &svp); // If this very frame provides a scroll view, start there instead of frame's // closest view, because the scroll view may be inside a child frame. // For example, this happens in the case of overflow:scroll. // In that case we still use GetNearestScrollingView() because // we need a scrolling view that matches aDirection. nsIScrollableView* sv; nsIView* startView = svp && (sv = svp->GetScrollableView()) ? sv->View() : startFrame->GetClosestView(); NS_ASSERTION(startView, "No view to start searching for scrollable view from"); scrollView = nsLayoutUtils::GetNearestScrollingView(startView, aDirection); } } if (!scrollView) { nsIViewManager* viewManager = GetViewManager(); if (viewManager) { viewManager->GetRootScrollableView(&scrollView); } } return scrollView; } NS_IMETHODIMP PresShell::CancelAllPendingReflows() { mDirtyRoots.Clear(); return NS_OK; } #ifdef ACCESSIBILITY void nsIPresShell::InvalidateAccessibleSubtree(nsIContent *aContent) { if (gIsAccessibilityActive) { nsCOMPtr accService = do_GetService("@mozilla.org/accessibilityService;1"); if (accService) { accService->InvalidateSubtreeFor(this, aContent, nsIAccessibleEvent::EVENT_ASYNCH_SIGNIFICANT_CHANGE); } } } #endif NS_IMETHODIMP PresShell::RecreateFramesFor(nsIContent* aContent) { NS_ENSURE_TRUE(mPresContext, NS_ERROR_FAILURE); if (!mDidInitialReflow) { // Nothing to do here. In fact, if we proceed and aContent is the // root we will crash. return NS_OK; } // Don't call RecreateFramesForContent since that is not exported and we want // to keep the number of entrypoints down. NS_ASSERTION(mViewManager, "Should have view manager"); nsIViewManager::UpdateViewBatch batch(mViewManager); // Have to make sure that the content notifications are flushed before we // start messing with the frame model; otherwise we can get content doubling. mDocument->FlushPendingNotifications(Flush_ContentAndNotify); nsStyleChangeList changeList; changeList.AppendChange(nsnull, aContent, nsChangeHint_ReconstructFrame); // Mark ourselves as not safe to flush while we're doing frame construction. ++mChangeNestCount; nsresult rv = mFrameConstructor->ProcessRestyledFrames(changeList); --mChangeNestCount; batch.EndUpdateViewBatch(NS_VMREFRESH_NO_SYNC); #ifdef ACCESSIBILITY InvalidateAccessibleSubtree(aContent); #endif return rv; } NS_IMETHODIMP PresShell::ClearFrameRefs(nsIFrame* aFrame) { mPresContext->EventStateManager()->ClearFrameRefs(aFrame); if (aFrame == mCurrentEventFrame) { mCurrentEventContent = aFrame->GetContent(); mCurrentEventFrame = nsnull; } #ifdef NS_DEBUG if (aFrame == mDrawEventTargetFrame) { mDrawEventTargetFrame = nsnull; } #endif for (int i=0; iGetContent(); mCurrentEventContentStack.ReplaceObjectAt(currentEventContent, i); mCurrentEventFrameStack.ReplaceElementAt(nsnull, i); } } nsWeakFrame* weakFrame = mWeakFrames; while (weakFrame) { nsWeakFrame* prev = weakFrame->GetPreviousWeakFrame(); if (weakFrame->GetFrame() == aFrame) { // This removes weakFrame from mWeakFrames. weakFrame->Clear(this); } weakFrame = prev; } return NS_OK; } NS_IMETHODIMP PresShell::CreateRenderingContext(nsIFrame *aFrame, nsIRenderingContext** aResult) { NS_PRECONDITION(nsnull != aResult, "null ptr"); if (nsnull == aResult) { return NS_ERROR_NULL_POINTER; } nsIWidget* widget = nsnull; nsPoint offset(0,0); if (mPresContext->IsScreen()) { // Get the widget to create the rendering context for and calculate // the offset from the frame to it. (Calculating the offset is important // if the frame isn't the root frame.) nsPoint viewOffset; nsIView* view = aFrame->GetClosestView(&viewOffset); nsPoint widgetOffset; widget = view->GetNearestWidget(&widgetOffset); offset = viewOffset + widgetOffset; } else { nsIFrame* pageFrame = nsLayoutUtils::GetPageFrame(aFrame); // This might not always come up with a frame, i.e. during reflow; // that's fine, because the translation doesn't matter during reflow. if (pageFrame) offset = aFrame->GetOffsetTo(pageFrame); } nsresult rv; nsIRenderingContext* result = nsnull; nsIDeviceContext *deviceContext = mPresContext->DeviceContext(); if (widget) { rv = deviceContext->CreateRenderingContext(widget, result); } else { rv = deviceContext->CreateRenderingContext(result); } *aResult = result; if (NS_SUCCEEDED(rv)) { result->Translate(offset.x, offset.y); } return rv; } NS_IMETHODIMP PresShell::GoToAnchor(const nsAString& aAnchorName, PRBool aScroll) { if (!mDocument) { return NS_ERROR_FAILURE; } // Hold a reference to the ESM in case event dispatch tears us down. nsCOMPtr esm = mPresContext->EventStateManager(); if (aAnchorName.IsEmpty()) { NS_ASSERTION(!aScroll, "can't scroll to empty anchor name"); esm->SetContentState(nsnull, NS_EVENT_STATE_URLTARGET); return NS_OK; } nsCOMPtr doc = do_QueryInterface(mDocument); nsCOMPtr htmlDoc = do_QueryInterface(mDocument); nsresult rv = NS_OK; nsCOMPtr content; // Search for an element with a matching "id" attribute if (doc) { nsCOMPtr element; rv = doc->GetElementById(aAnchorName, getter_AddRefs(element)); if (NS_SUCCEEDED(rv) && element) { // Get the nsIContent interface, because that's what we need to // get the primary frame content = do_QueryInterface(element); } } // Search for an anchor element with a matching "name" attribute if (!content && htmlDoc) { nsCOMPtr list; // Find a matching list of named nodes rv = htmlDoc->GetElementsByName(aAnchorName, getter_AddRefs(list)); if (NS_SUCCEEDED(rv) && list) { PRUint32 i; // Loop through the named nodes looking for the first anchor for (i = 0; PR_TRUE; i++) { nsCOMPtr node; rv = list->Item(i, getter_AddRefs(node)); if (!node) { // End of list break; } // Ensure it's an anchor element content = do_QueryInterface(node); if (content) { if (content->Tag() == nsGkAtoms::a && content->IsNodeOfType(nsINode::eHTML)) { break; } content = nsnull; } } } } // Search for anchor in the HTML namespace with a matching name if (!content && !htmlDoc) { nsCOMPtr list; NS_NAMED_LITERAL_STRING(nameSpace, "http://www.w3.org/1999/xhtml"); // Get the list of anchor elements rv = doc->GetElementsByTagNameNS(nameSpace, NS_LITERAL_STRING("a"), getter_AddRefs(list)); if (NS_SUCCEEDED(rv) && list) { PRUint32 i; // Loop through the named nodes looking for the first anchor for (i = 0; PR_TRUE; i++) { nsCOMPtr node; rv = list->Item(i, getter_AddRefs(node)); if (!node) { // End of list break; } // Compare the name attribute nsCOMPtr element = do_QueryInterface(node); nsAutoString value; if (element && NS_SUCCEEDED(element->GetAttribute(NS_LITERAL_STRING("name"), value))) { if (value.Equals(aAnchorName)) { content = do_QueryInterface(element); break; } } } } } nsCOMPtr jumpToRange; nsCOMPtr xpointerResult; if (!content) { nsCOMPtr xmldoc = do_QueryInterface(mDocument); if (xmldoc) { // Try XPointer xmldoc->EvaluateXPointer(aAnchorName, getter_AddRefs(xpointerResult)); if (xpointerResult) { xpointerResult->Item(0, getter_AddRefs(jumpToRange)); if (!jumpToRange) { // We know it was an XPointer, so there is no point in // trying any other pointer types, let's just return // an error. return NS_ERROR_FAILURE; } } // Finally try FIXptr if (!jumpToRange) { xmldoc->EvaluateFIXptr(aAnchorName,getter_AddRefs(jumpToRange)); } if (jumpToRange) { nsCOMPtr node; jumpToRange->GetStartContainer(getter_AddRefs(node)); if (node) { PRUint16 nodeType; node->GetNodeType(&nodeType); PRInt32 offset = -1; jumpToRange->GetStartOffset(&offset); switch (nodeType) { case nsIDOMNode::ATTRIBUTE_NODE: { // XXX Assuming jumping to the ownerElement is the sanest action. nsCOMPtr attr = do_QueryInterface(node); content = attr->GetContent(); break; } case nsIDOMNode::DOCUMENT_NODE: { if (offset >= 0) { nsCOMPtr document = do_QueryInterface(node); content = document->GetChildAt(offset); } break; } case nsIDOMNode::DOCUMENT_FRAGMENT_NODE: case nsIDOMNode::ELEMENT_NODE: case nsIDOMNode::ENTITY_REFERENCE_NODE: { if (offset >= 0) { nsCOMPtr parent = do_QueryInterface(node); content = parent->GetChildAt(offset); } break; } case nsIDOMNode::CDATA_SECTION_NODE: case nsIDOMNode::COMMENT_NODE: case nsIDOMNode::TEXT_NODE: case nsIDOMNode::PROCESSING_INSTRUCTION_NODE: { // XXX This should scroll to a specific position in the text. content = do_QueryInterface(node); break; } } } } } } esm->SetContentState(content, NS_EVENT_STATE_URLTARGET); if (content) { // Flush notifications so we scroll to the right place if (aScroll) { rv = ScrollContentIntoView(content, NS_PRESSHELL_SCROLL_TOP, NS_PRESSHELL_SCROLL_ANYWHERE); NS_ENSURE_SUCCESS(rv, rv); } // Should we select the target? This action is controlled by a // preference: the default is to not select. PRBool selectAnchor = nsContentUtils::GetBoolPref("layout.selectanchor"); // Even if select anchor pref is false, we must still move the // caret there. That way tabbing will start from the new // location if (!jumpToRange) { jumpToRange = do_CreateInstance(kRangeCID); if (jumpToRange) { while (content && content->GetChildCount() > 0) { content = content->GetChildAt(0); } nsCOMPtr node(do_QueryInterface(content)); NS_ASSERTION(node, "No nsIDOMNode for descendant of anchor"); jumpToRange->SelectNodeContents(node); } } if (jumpToRange) { // Select the anchor nsISelection* sel = mSelection-> GetSelection(nsISelectionController::SELECTION_NORMAL); if (sel) { sel->RemoveAllRanges(); sel->AddRange(jumpToRange); if (!selectAnchor) { // Use a caret (collapsed selection) at the start of the anchor sel->CollapseToStart(); } } if (selectAnchor && xpointerResult) { // Select the rest (if any) of the ranges in XPointerResult PRUint32 count, i; xpointerResult->GetLength(&count); for (i = 1; i < count; i++) { // jumpToRange is i = 0 nsCOMPtr range; xpointerResult->Item(i, getter_AddRefs(range)); sel->AddRange(range); } } // Selection is at anchor. // Now focus the document itself if focus is on an element within it. nsPIDOMWindow *win = mDocument->GetWindow(); if (win) { nsCOMPtr focusController = win->GetRootFocusController(); if (focusController) { nsCOMPtr focusedWin; focusController->GetFocusedWindow(getter_AddRefs(focusedWin)); if (SameCOMIdentity(win, focusedWin)) { esm->ChangeFocusWith(nsnull, nsIEventStateManager::eEventFocusedByApplication); } } } } } else { rv = NS_ERROR_FAILURE; //changed to NS_OK in quirks mode if ScrollTo is called // Scroll to the top/left if the anchor can not be // found and it is labelled top (quirks mode only). @see bug 80784 if ((NS_LossyConvertUTF16toASCII(aAnchorName).LowerCaseEqualsLiteral("top")) && (mPresContext->CompatibilityMode() == eCompatibility_NavQuirks)) { rv = NS_OK; // Check |aScroll| after setting |rv| so we set |rv| to the same // thing whether or not |aScroll| is true. if (aScroll && mViewManager) { // Get the viewport scroller nsIScrollableView* scrollingView; mViewManager->GetRootScrollableView(&scrollingView); if (scrollingView) { // Scroll to the top of the page scrollingView->ScrollTo(0, 0, NS_VMREFRESH_IMMEDIATE); } } } } return rv; } /* * Helper (per-continuation) for ScrollContentIntoView. * * @param aFrame [in] Frame whose bounds should be unioned * @param aVPercent [in] same as for ScrollContentIntoView * @param aRect [inout] rect into which its bounds should be unioned * @param aHaveRect [inout] whether aRect contains data yet * @param aClosestScrolledView [inout] the view to which aRect is relative. * If null, should be filled in appropriately. If non-null, the function * will no-op if the closest scrolling view doesn't match. */ static void UnionRectForClosestScrolledView(nsIFrame* aFrame, PRIntn aVPercent, nsRect& aRect, PRBool& aHaveRect, nsIView*& aClosestScrolledView) { nsRect frameBounds = aFrame->GetRect(); nsPoint offset; nsIView* closestView; aFrame->GetOffsetFromView(offset, &closestView); frameBounds.MoveTo(offset); // If this is an inline frame and either the bounds height is 0 (quirks // layout model) or aVPercent is not NS_PRESSHELL_SCROLL_ANYWHERE, we need to // change the top of the bounds to include the whole line. if (frameBounds.height == 0 || aVPercent != NS_PRESSHELL_SCROLL_ANYWHERE) { nsIAtom* frameType = NULL; nsIFrame *prevFrame = aFrame; nsIFrame *f = aFrame; while (f && (frameType = f->GetType()) == nsGkAtoms::inlineFrame) { prevFrame = f; f = prevFrame->GetParent(); } if (f != aFrame && f && frameType == nsGkAtoms::blockFrame) { // find the line containing aFrame and increase the top of |offset|. nsCOMPtr lines(do_QueryInterface(f)); if (lines) { PRInt32 index = -1; lines->FindLineContaining(prevFrame, &index); if (index >= 0) { nsIFrame *trash1; PRInt32 trash2; nsRect lineBounds; PRUint32 trash3; if (NS_SUCCEEDED(lines->GetLine(index, &trash1, &trash2, lineBounds, &trash3))) { nsPoint blockOffset; nsIView* blockView; f->GetOffsetFromView(blockOffset, &blockView); if (blockView == closestView) { // XXX If views not equal, this is hard. Do we want to bother? nscoord newoffset = lineBounds.y + blockOffset.y; if (newoffset < frameBounds.y) frameBounds.y = newoffset; } } } } } } NS_ASSERTION(closestView && !closestView->ToScrollableView(), "What happened to the scrolled view? " "The frame should not be directly in the scrolling view!"); // Walk up the view hierarchy. Make sure to add the view's position // _after_ we get the parent and see whether it's scrollable. We want to // make sure to get the scrolled view's position after it has been scrolled. while (closestView) { nsIView* parent = closestView->GetParent(); if (parent && parent->ToScrollableView()) break; frameBounds += closestView->GetPosition(); closestView = parent; } if (!aClosestScrolledView) aClosestScrolledView = closestView; if (aClosestScrolledView == closestView) { if (aHaveRect) { // We can't use nsRect::UnionRect since it drops empty rects on // the floor, and we need to include them. (Thus we need // aHaveRect to know when to drop the initial value on the floor.) nscoord x = PR_MIN(aRect.x, frameBounds.x), y = PR_MIN(aRect.y, frameBounds.y), xmost = PR_MAX(aRect.XMost(), frameBounds.XMost()), ymost = PR_MAX(aRect.YMost(), frameBounds.YMost()); aRect.SetRect(x, y, xmost - x, ymost - y); } else { aHaveRect = PR_TRUE; aRect = frameBounds; } } } /** * This function takes a scrolling view, a rect, and a scroll position and * attempts to scroll that rect to that position in that view. The rect * should be in the coordinate system of the _scrolled_ view. */ static void ScrollViewToShowRect(nsIScrollableView* aScrollingView, nsRect & aRect, PRIntn aVPercent, PRIntn aHPercent) { // Determine the visible rect in the scrolling view's coordinate space. // The size of the visible area is the clip view size nsRect visibleRect = aScrollingView->View()->GetBounds(); // get width and height aScrollingView->GetScrollPosition(visibleRect.x, visibleRect.y); // The actual scroll offsets nscoord scrollOffsetX = visibleRect.x; nscoord scrollOffsetY = visibleRect.y; nscoord lineHeight; aScrollingView->GetLineHeight(&lineHeight); // See how the rect should be positioned vertically if (NS_PRESSHELL_SCROLL_ANYWHERE == aVPercent || (NS_PRESSHELL_SCROLL_IF_NOT_VISIBLE == aVPercent && aRect.height < lineHeight)) { // The caller doesn't care where the frame is positioned vertically, // so long as it's fully visible if (aRect.y < visibleRect.y) { // Scroll up so the frame's top edge is visible scrollOffsetY = aRect.y; } else if (aRect.YMost() > visibleRect.YMost()) { // Scroll down so the frame's bottom edge is visible. Make sure the // frame's top edge is still visible scrollOffsetY += aRect.YMost() - visibleRect.YMost(); if (scrollOffsetY > aRect.y) { scrollOffsetY = aRect.y; } } } else if (NS_PRESSHELL_SCROLL_IF_NOT_VISIBLE == aVPercent) { // Scroll only if no part of the frame is visible in this view if (aRect.YMost() - lineHeight < visibleRect.y) { // Scroll up so the frame's top edge is visible scrollOffsetY = aRect.y; } else if (aRect.y + lineHeight > visibleRect.YMost()) { // Scroll down so the frame's bottom edge is visible. Make sure the // frame's top edge is still visible scrollOffsetY += aRect.YMost() - visibleRect.YMost(); if (scrollOffsetY > aRect.y) { scrollOffsetY = aRect.y; } } } else { // Align the frame edge according to the specified percentage nscoord frameAlignY = NSToCoordRound(aRect.y + aRect.height * (aVPercent / 100.0f)); scrollOffsetY = NSToCoordRound(frameAlignY - visibleRect.height * (aVPercent / 100.0f)); } // See how the frame should be positioned horizontally if (NS_PRESSHELL_SCROLL_ANYWHERE == aHPercent || (NS_PRESSHELL_SCROLL_IF_NOT_VISIBLE == aHPercent && aRect.width < lineHeight)) { // The caller doesn't care where the frame is positioned horizontally, // so long as it's fully visible if (aRect.x < visibleRect.x) { // Scroll left so the frame's left edge is visible scrollOffsetX = aRect.x; } else if (aRect.XMost() > visibleRect.XMost()) { // Scroll right so the frame's right edge is visible. Make sure the // frame's left edge is still visible scrollOffsetX += aRect.XMost() - visibleRect.XMost(); if (scrollOffsetX > aRect.x) { scrollOffsetX = aRect.x; } } } else if (NS_PRESSHELL_SCROLL_IF_NOT_VISIBLE == aHPercent) { // Scroll only if no part of the frame is visible in this view // XXXbz using the line height here is odd, but there are no // natural dimensions to use here, really.... if (aRect.XMost() - lineHeight < visibleRect.x) { // Scroll left so the frame's left edge is visible scrollOffsetX = aRect.x; } else if (aRect.x + lineHeight > visibleRect.XMost()) { // Scroll right so the frame's right edge is visible. Make sure the // frame's left edge is still visible scrollOffsetX += aRect.XMost() - visibleRect.XMost(); if (scrollOffsetX > aRect.x) { scrollOffsetX = aRect.x; } } } else { // Align the frame edge according to the specified percentage nscoord frameAlignX = NSToCoordRound(aRect.x + (aRect.width) * (aHPercent / 100.0f)); scrollOffsetX = NSToCoordRound(frameAlignX - visibleRect.width * (aHPercent / 100.0f)); } aScrollingView->ScrollTo(scrollOffsetX, scrollOffsetY, NS_VMREFRESH_IMMEDIATE); } NS_IMETHODIMP PresShell::ScrollContentIntoView(nsIContent* aContent, PRIntn aVPercent, PRIntn aHPercent) const { nsCOMPtr content = aContent; // Keep content alive while flushing. NS_ENSURE_TRUE(content, NS_ERROR_NULL_POINTER); nsCOMPtr currentDoc = content->GetCurrentDoc(); NS_ENSURE_STATE(currentDoc); currentDoc->FlushPendingNotifications(Flush_Layout); nsIFrame* frame = GetPrimaryFrameFor(content); if (!frame) { return NS_ERROR_NULL_POINTER; } // Before we scroll the frame into view, ask the command dispatcher // if we're resetting focus because a window just got an activate // event. If we are, we do not want to scroll the frame into view. // Example: The user clicks on an anchor, and then deactivates the // window. When they reactivate the window, the expected behavior // is not for the anchor link to scroll back into view. That is what // this check is preventing. // XXX: The dependency on the command dispatcher needs to be fixed. nsPIDOMWindow* ourWindow = currentDoc->GetWindow(); if(ourWindow) { nsIFocusController *focusController = ourWindow->GetRootFocusController(); if (focusController) { PRBool dontScroll = PR_FALSE; focusController->GetSuppressFocusScroll(&dontScroll); if(dontScroll) { return NS_OK; } } } // This is a two-step process. // Step 1: Find the bounds of the rect we want to scroll into view. For // example, for an inline frame we may want to scroll in the whole // line. // Step 2: Walk the views that are parents of the frame and scroll them // appropriately. nsIView *closestView = nsnull; nsRect frameBounds; PRBool haveRect = PR_FALSE; do { UnionRectForClosestScrolledView(frame, aVPercent, frameBounds, haveRect, closestView); } while ((frame = frame->GetNextContinuation())); // Walk up the view hierarchy. Make sure to add the view's position // _after_ we get the parent and see whether it's scrollable. We want to // make sure to get the scrolled view's position after it has been scrolled. nsIScrollableView* scrollingView = nsnull; while (closestView) { nsIView* parent = closestView->GetParent(); if (parent) { scrollingView = parent->ToScrollableView(); if (scrollingView) { ScrollViewToShowRect(scrollingView, frameBounds, aVPercent, aHPercent); } } frameBounds += closestView->GetPosition(); closestView = parent; } return NS_OK; } // GetLinkLocation: copy link location to clipboard NS_IMETHODIMP PresShell::GetLinkLocation(nsIDOMNode* aNode, nsAString& aLocationString) { #ifdef DEBUG_dr printf("dr :: PresShell::GetLinkLocation\n"); #endif NS_ENSURE_ARG_POINTER(aNode); nsresult rv; nsAutoString anchorText; static char strippedChars[] = {'\t','\r','\n'}; // are we an anchor? nsCOMPtr anchor(do_QueryInterface(aNode)); nsCOMPtr area; nsCOMPtr link; nsAutoString xlinkType; if (anchor) { rv = anchor->GetHref(anchorText); NS_ENSURE_SUCCESS(rv, rv); } else { // area? area = do_QueryInterface(aNode); if (area) { rv = area->GetHref(anchorText); NS_ENSURE_SUCCESS(rv, rv); } else { // link? link = do_QueryInterface(aNode); if (link) { rv = link->GetHref(anchorText); NS_ENSURE_SUCCESS(rv, rv); } else { // Xlink? nsCOMPtr element(do_QueryInterface(aNode)); if (element) { NS_NAMED_LITERAL_STRING(xlinkNS,"http://www.w3.org/1999/xlink"); element->GetAttributeNS(xlinkNS,NS_LITERAL_STRING("type"),xlinkType); if (xlinkType.EqualsLiteral("simple")) { element->GetAttributeNS(xlinkNS,NS_LITERAL_STRING("href"),anchorText); if (!anchorText.IsEmpty()) { // Resolve the full URI using baseURI property nsAutoString base; nsCOMPtr node(do_QueryInterface(aNode,&rv)); NS_ENSURE_SUCCESS(rv, rv); node->GetBaseURI(base); nsCOMPtr ios(do_GetService("@mozilla.org/network/io-service;1", &rv)); NS_ENSURE_SUCCESS(rv, rv); nsCOMPtr baseURI; rv = ios->NewURI(NS_ConvertUTF16toUTF8(base),nsnull,nsnull,getter_AddRefs(baseURI)); NS_ENSURE_SUCCESS(rv, rv); nsCAutoString spec; rv = baseURI->Resolve(NS_ConvertUTF16toUTF8(anchorText),spec); NS_ENSURE_SUCCESS(rv, rv); CopyUTF8toUTF16(spec, anchorText); } } } } } } if (anchor || area || link || xlinkType.EqualsLiteral("simple")) { //Remove all the '\t', '\r' and '\n' from 'anchorText' anchorText.StripChars(strippedChars); aLocationString = anchorText; return NS_OK; } // if no link, fail. return NS_ERROR_FAILURE; } NS_IMETHODIMP PresShell::GetSelectionForCopy(nsISelection** outSelection) { nsresult rv = NS_OK; *outSelection = nsnull; if (!mDocument) return NS_ERROR_FAILURE; nsCOMPtr content; nsPIDOMWindow *ourWindow = mDocument->GetWindow(); if (ourWindow) { nsIFocusController *focusController = ourWindow->GetRootFocusController(); if (focusController) { nsCOMPtr focusedElement; focusController->GetFocusedElement(getter_AddRefs(focusedElement)); content = do_QueryInterface(focusedElement); } } nsCOMPtr sel; if (content) { //check to see if we need to get selection from frame //optimization that MAY need to be expanded as more things implement their own "selection" nsCOMPtr htmlInputElement(do_QueryInterface(content)); nsCOMPtr htmlTextAreaElement(do_QueryInterface(content)); if (htmlInputElement || htmlTextAreaElement) { nsIFrame *htmlInputFrame = GetPrimaryFrameFor(content); if (!htmlInputFrame) return NS_ERROR_FAILURE; nsCOMPtr selCon; rv = htmlInputFrame-> GetSelectionController(mPresContext,getter_AddRefs(selCon)); if (NS_FAILED(rv)) return rv; if (!selCon) return NS_ERROR_FAILURE; rv = selCon->GetSelection(nsISelectionController::SELECTION_NORMAL, getter_AddRefs(sel)); } } if (!sel) { sel = mSelection->GetSelection(nsISelectionController::SELECTION_NORMAL); rv = NS_OK; } *outSelection = sel; NS_IF_ADDREF(*outSelection); return rv; } NS_IMETHODIMP PresShell::DoGetContents(const nsACString& aMimeType, PRUint32 aFlags, PRBool aSelectionOnly, nsAString& aOutValue) { aOutValue.Truncate(); if (!mDocument) return NS_ERROR_FAILURE; nsresult rv; nsCOMPtr sel; // Now we have the selection. Make sure it's nonzero: if (aSelectionOnly) { rv = GetSelectionForCopy(getter_AddRefs(sel)); if (NS_FAILED(rv)) return rv; if (!sel) return NS_ERROR_FAILURE; PRBool isCollapsed; sel->GetIsCollapsed(&isCollapsed); if (isCollapsed) return NS_OK; } // call the copy code return nsCopySupport::GetContents(aMimeType, aFlags, sel, mDocument, aOutValue); } NS_IMETHODIMP PresShell::DoCopy() { if (!mDocument) return NS_ERROR_FAILURE; nsCOMPtr sel; nsresult rv = GetSelectionForCopy(getter_AddRefs(sel)); if (NS_FAILED(rv)) return rv; if (!sel) return NS_ERROR_FAILURE; // Now we have the selection. Make sure it's nonzero: PRBool isCollapsed; sel->GetIsCollapsed(&isCollapsed); if (isCollapsed) return NS_OK; // call the copy code rv = nsCopySupport::HTMLCopy(sel, mDocument, nsIClipboard::kGlobalClipboard); if (NS_FAILED(rv)) return rv; // Now that we have copied, update the Paste menu item nsPIDOMWindow *domWindow = mDocument->GetWindow(); if (domWindow) { domWindow->UpdateCommands(NS_LITERAL_STRING("clipboard")); } return NS_OK; } NS_IMETHODIMP PresShell::CaptureHistoryState(nsILayoutHistoryState** aState, PRBool aLeavingPage) { nsresult rv = NS_OK; NS_PRECONDITION(nsnull != aState, "null state pointer"); // We actually have to mess with the docshell here, since we want to // store the state back in it. // XXXbz this isn't really right, since this is being called in the // content viewer's Hide() method... by that point the docshell's // state could be wrong. We should sort out a better ownership // model for the layout history state. nsCOMPtr container = mPresContext->GetContainer(); if (!container) return NS_ERROR_FAILURE; nsCOMPtr docShell(do_QueryInterface(container)); if (!docShell) return NS_ERROR_FAILURE; nsCOMPtr historyState; docShell->GetLayoutHistoryState(getter_AddRefs(historyState)); if (!historyState) { // Create the document state object rv = NS_NewLayoutHistoryState(getter_AddRefs(historyState)); if (NS_FAILED(rv)) { *aState = nsnull; return rv; } docShell->SetLayoutHistoryState(historyState); } *aState = historyState; NS_IF_ADDREF(*aState); // Capture frame state for the entire frame hierarchy nsIFrame* rootFrame = FrameManager()->GetRootFrame(); if (!rootFrame) return NS_OK; // Capture frame state for the root scroll frame // Don't capture state when first creating doc element hierarchy // As the scroll position is 0 and this will cause us to loose // our previously saved place! if (aLeavingPage) { nsIFrame* scrollFrame = GetRootScrollFrame(); if (scrollFrame) { FrameManager()->CaptureFrameStateFor(scrollFrame, historyState, nsIStatefulFrame::eDocumentScrollState); } } FrameManager()->CaptureFrameState(rootFrame, historyState); return NS_OK; } NS_IMETHODIMP PresShell::IsPaintingSuppressed(PRBool* aResult) { *aResult = mPaintingSuppressed; return NS_OK; } void PresShell::UnsuppressAndInvalidate() { if (!mPresContext->EnsureVisible(PR_FALSE)) { // No point; we're about to be torn down anyway. return; } mPaintingSuppressed = PR_FALSE; nsIFrame* rootFrame = FrameManager()->GetRootFrame(); if (rootFrame) { // let's assume that outline on a root frame is not supported nsRect rect(nsPoint(0, 0), rootFrame->GetSize()); rootFrame->Invalidate(rect, PR_FALSE); } // This makes sure to get the same thing that nsPresContext::EnsureVisible() // got. nsCOMPtr container = mPresContext->GetContainer(); nsCOMPtr ourWindow = do_GetInterface(container); nsCOMPtr focusController = ourWindow ? ourWindow->GetRootFocusController() : nsnull; if (ourWindow) CheckForFocus(ourWindow, focusController, mDocument); if (focusController) // Unsuppress now that we've shown the new window and focused it. focusController->SetSuppressFocus(PR_FALSE, "PresShell suppression on Web page loads"); if (mViewManager) mViewManager->SynthesizeMouseMove(PR_FALSE); // If there is no selection, create a collapsed selection at the top of the document. if (mSelection) { nsISelection* domSelection = mSelection-> GetSelection(nsISelectionController::SELECTION_NORMAL); if (domSelection) { PRInt32 rangeCount; domSelection->GetRangeCount(&rangeCount); if (rangeCount == 0) CompleteMoveInner(PR_FALSE, PR_FALSE, PR_FALSE); } } } NS_IMETHODIMP PresShell::UnsuppressPainting() { if (mPaintSuppressionTimer) { mPaintSuppressionTimer->Cancel(); mPaintSuppressionTimer = nsnull; } if (mIsDocumentGone || !mPaintingSuppressed) return NS_OK; // If we have reflows pending, just wait until we process // the reflows and get all the frames where we want them // before actually unlocking the painting. Otherwise // go ahead and unlock now. if (mDirtyRoots.Count() > 0) mShouldUnsuppressPainting = PR_TRUE; else UnsuppressAndInvalidate(); return NS_OK; } NS_IMETHODIMP PresShell::DisableThemeSupport() { // Doesn't have to be dynamic. Just set the bool. mIsThemeSupportDisabled = PR_TRUE; return NS_OK; } PRBool PresShell::IsThemeSupportEnabled() { return !mIsThemeSupportDisabled; } // Post a request to handle an arbitrary callback after reflow has finished. NS_IMETHODIMP PresShell::PostReflowCallback(nsIReflowCallback* aCallback) { void* result = AllocateFrame(sizeof(nsCallbackEventRequest)); if (NS_UNLIKELY(!result)) { return NS_ERROR_OUT_OF_MEMORY; } nsCallbackEventRequest* request = (nsCallbackEventRequest*)result; request->callback = aCallback; request->next = nsnull; if (mLastCallbackEventRequest) { mLastCallbackEventRequest = mLastCallbackEventRequest->next = request; } else { mFirstCallbackEventRequest = request; mLastCallbackEventRequest = request; } return NS_OK; } NS_IMETHODIMP PresShell::CancelReflowCallback(nsIReflowCallback* aCallback) { nsCallbackEventRequest* before = nsnull; nsCallbackEventRequest* node = mFirstCallbackEventRequest; while(node) { nsIReflowCallback* callback = node->callback; if (callback == aCallback) { nsCallbackEventRequest* toFree = node; if (node == mFirstCallbackEventRequest) { node = node->next; mFirstCallbackEventRequest = node; NS_ASSERTION(before == nsnull, "impossible"); } else { node = node->next; before->next = node; } if (toFree == mLastCallbackEventRequest) { mLastCallbackEventRequest = before; } FreeFrame(sizeof(nsCallbackEventRequest), toFree); } else { before = node; node = node->next; } } return NS_OK; } void PresShell::CancelPostedReflowCallbacks() { while (mFirstCallbackEventRequest) { nsCallbackEventRequest* node = mFirstCallbackEventRequest; mFirstCallbackEventRequest = node->next; if (!mFirstCallbackEventRequest) { mLastCallbackEventRequest = nsnull; } nsIReflowCallback* callback = node->callback; FreeFrame(sizeof(nsCallbackEventRequest), node); if (callback) { callback->ReflowCallbackCanceled(); } } } void PresShell::HandlePostedReflowCallbacks() { PRBool shouldFlush = PR_FALSE; while (mFirstCallbackEventRequest) { nsCallbackEventRequest* node = mFirstCallbackEventRequest; mFirstCallbackEventRequest = node->next; if (!mFirstCallbackEventRequest) { mLastCallbackEventRequest = nsnull; } nsIReflowCallback* callback = node->callback; FreeFrame(sizeof(nsCallbackEventRequest), node); if (callback) { if (callback->ReflowFinished()) { shouldFlush = PR_TRUE; } } } if (shouldFlush) FlushPendingNotifications(Flush_Layout); } NS_IMETHODIMP PresShell::IsSafeToFlush(PRBool& aIsSafeToFlush) { aIsSafeToFlush = PR_TRUE; if (mIsReflowing || mChangeNestCount) { // Not safe if we are reflowing or in the middle of frame construction aIsSafeToFlush = PR_FALSE; } else { // Not safe if we are painting nsIViewManager* viewManager = GetViewManager(); if (viewManager) { PRBool isPainting = PR_FALSE; viewManager->IsPainting(isPainting); if (isPainting) { aIsSafeToFlush = PR_FALSE; } } } return NS_OK; } NS_IMETHODIMP PresShell::FlushPendingNotifications(mozFlushType aType) { return DoFlushPendingNotifications(aType, PR_FALSE); } nsresult PresShell::DoFlushPendingNotifications(mozFlushType aType, PRBool aInterruptibleReflow) { NS_ASSERTION(aType >= Flush_Frames, "Why did we get called?"); PRBool isSafeToFlush; IsSafeToFlush(isSafeToFlush); NS_ASSERTION(!isSafeToFlush || mViewManager, "Must have view manager"); // Make sure the view manager stays alive while batching view updates. nsCOMPtr viewManagerDeathGrip = mViewManager; if (isSafeToFlush && mViewManager) { // Processing pending notifications can kill us, and some callers only // hold weak refs when calling FlushPendingNotifications(). :( nsCOMPtr kungFuDeathGrip(this); // Style reresolves not in conjunction with reflows can't cause // painting or geometry changes, so don't bother with view update // batching if we only have style reresolve nsIViewManager::UpdateViewBatch batch(mViewManager); // Force flushing of any pending content notifications that might have // queued up while our event was pending. That will ensure that we don't // construct frames for content right now that's still waiting to be // notified on, mDocument->FlushPendingNotifications(Flush_ContentAndNotify); // Process pending restyles, since any flush of the presshell wants // up-to-date style data. if (!mIsDestroying) { mFrameConstructor->ProcessPendingRestyles(); } // Process whatever XBL constructors those restyles queued up. This // ensures that onload doesn't fire too early and that we won't do extra // reflows after those constructors run. if (!mIsDestroying) { mDocument->BindingManager()->ProcessAttachedQueue(); } // Now those constructors might have posted restyle events. At the same // time, we still need up-to-date style data. In particular, reflow // depends on style being completely up to date. If it's not, then style // context reparenting, which can happen during reflow, might suddenly pick // up the new rules and we'll end up with frames whose style doesn't match // the frame type. if (!mIsDestroying) { mFrameConstructor->ProcessPendingRestyles(); } // There might be more pending constructors now, but we're not going to // worry about them. They can't be triggered during reflow, so we should // be good. if (aType >= Flush_Layout && !mIsDestroying) { mFrameConstructor->RecalcQuotesAndCounters(); ProcessReflowCommands(aInterruptibleReflow); } PRUint32 updateFlags = NS_VMREFRESH_NO_SYNC; if (aType >= Flush_Display) { // Flushing paints, so perform the invalidates and drawing // immediately updateFlags = NS_VMREFRESH_IMMEDIATE; } else if (aType < Flush_Layout) { // Not flushing reflows, so do deferred invalidates. This will keep us // from possibly flushing out reflows due to invalidates being processed // at the end of this view batch. updateFlags = NS_VMREFRESH_DEFERRED; } batch.EndUpdateViewBatch(updateFlags); } return NS_OK; } NS_IMETHODIMP PresShell::IsReflowLocked(PRBool* aIsReflowLocked) { *aIsReflowLocked = mIsReflowing; return NS_OK; } void PresShell::CharacterDataChanged(nsIDocument *aDocument, nsIContent* aContent, CharacterDataChangeInfo* aInfo) { NS_PRECONDITION(!mIsDocumentGone, "Unexpected CharacterDataChanged"); NS_PRECONDITION(aDocument == mDocument, "Unexpected aDocument"); WillCauseReflow(); if (mCaret) { // Invalidate the caret's current location before we call into the frame // constructor. It is important to do this now, and not wait until the // resulting reflow, because this call causes continuation frames of the // text frame the caret is in to forget what part of the content they // refer to, making it hard for them to return the correct continuation // frame to the caret. mCaret->InvalidateOutsideCaret(); } mFrameConstructor->CharacterDataChanged(aContent, aInfo->mAppend); VERIFY_STYLE_TREE; DidCauseReflow(); } void PresShell::ContentStatesChanged(nsIDocument* aDocument, nsIContent* aContent1, nsIContent* aContent2, PRInt32 aStateMask) { NS_PRECONDITION(!mIsDocumentGone, "Unexpected ContentStatesChanged"); NS_PRECONDITION(aDocument == mDocument, "Unexpected aDocument"); if (mDidInitialReflow) { WillCauseReflow(); mFrameConstructor->ContentStatesChanged(aContent1, aContent2, aStateMask); VERIFY_STYLE_TREE; DidCauseReflow(); } } void PresShell::AttributeChanged(nsIDocument* aDocument, nsIContent* aContent, PRInt32 aNameSpaceID, nsIAtom* aAttribute, PRInt32 aModType, PRUint32 aStateMask) { NS_PRECONDITION(!mIsDocumentGone, "Unexpected AttributeChanged"); NS_PRECONDITION(aDocument == mDocument, "Unexpected aDocument"); // XXXwaterson it might be more elegant to wait until after the // initial reflow to begin observing the document. That would // squelch any other inappropriate notifications as well. if (mDidInitialReflow) { WillCauseReflow(); mFrameConstructor->AttributeChanged(aContent, aNameSpaceID, aAttribute, aModType, aStateMask); VERIFY_STYLE_TREE; DidCauseReflow(); } } void PresShell::ContentAppended(nsIDocument *aDocument, nsIContent* aContainer, PRInt32 aNewIndexInContainer) { NS_PRECONDITION(!mIsDocumentGone, "Unexpected ContentAppended"); NS_PRECONDITION(aDocument == mDocument, "Unexpected aDocument"); if (!mDidInitialReflow) { return; } WillCauseReflow(); MOZ_TIMER_DEBUGLOG(("Start: Frame Creation: PresShell::ContentAppended(), this=%p\n", this)); MOZ_TIMER_START(mFrameCreationWatch); mFrameConstructor->ContentAppended(aContainer, aNewIndexInContainer); VERIFY_STYLE_TREE; MOZ_TIMER_DEBUGLOG(("Stop: Frame Creation: PresShell::ContentAppended(), this=%p\n", this)); MOZ_TIMER_STOP(mFrameCreationWatch); DidCauseReflow(); } void PresShell::ContentInserted(nsIDocument* aDocument, nsIContent* aContainer, nsIContent* aChild, PRInt32 aIndexInContainer) { NS_PRECONDITION(!mIsDocumentGone, "Unexpected ContentInserted"); NS_PRECONDITION(aDocument == mDocument, "Unexpected aDocument"); if (!mDidInitialReflow) { return; } WillCauseReflow(); mFrameConstructor->ContentInserted(aContainer, aChild, aIndexInContainer, nsnull); VERIFY_STYLE_TREE; DidCauseReflow(); } void PresShell::ContentRemoved(nsIDocument *aDocument, nsIContent* aContainer, nsIContent* aChild, PRInt32 aIndexInContainer) { NS_PRECONDITION(!mIsDocumentGone, "Unexpected ContentRemoved"); NS_PRECONDITION(aDocument == mDocument, "Unexpected aDocument"); // Make sure that the caret doesn't leave a turd where the child used to be. if (mCaret) { mCaret->InvalidateOutsideCaret(); } // Notify the ESM that the content has been removed, so that // it can clean up any state related to the content. mPresContext->EventStateManager()->ContentRemoved(aChild); WillCauseReflow(); PRBool didReconstruct; mFrameConstructor->ContentRemoved(aContainer, aChild, aIndexInContainer, &didReconstruct); VERIFY_STYLE_TREE; DidCauseReflow(); } nsresult PresShell::ReconstructFrames(void) { nsresult rv = NS_OK; WillCauseReflow(); rv = mFrameConstructor->ReconstructDocElementHierarchy(); VERIFY_STYLE_TREE; DidCauseReflow(); return rv; } void nsIPresShell::ReconstructStyleDataInternal() { mStylesHaveChanged = PR_FALSE; if (!mDidInitialReflow) { // Nothing to do here, since we have no frames yet return; } if (mIsDestroying) { // We don't want to mess with restyles at this point return; } nsIContent* root = mDocument->GetRootContent(); if (!root) { // No content to restyle return; } mFrameConstructor->PostRestyleEvent(root, eReStyle_Self, NS_STYLE_HINT_NONE); #ifdef ACCESSIBILITY InvalidateAccessibleSubtree(nsnull); #endif } void nsIPresShell::ReconstructStyleDataExternal() { ReconstructStyleDataInternal(); } void PresShell::StyleSheetAdded(nsIDocument *aDocument, nsIStyleSheet* aStyleSheet, PRBool aDocumentSheet) { // We only care when enabled sheets are added NS_PRECONDITION(aStyleSheet, "Must have a style sheet!"); PRBool applicable; aStyleSheet->GetApplicable(applicable); if (applicable && aStyleSheet->HasRules()) { mStylesHaveChanged = PR_TRUE; } } void PresShell::StyleSheetRemoved(nsIDocument *aDocument, nsIStyleSheet* aStyleSheet, PRBool aDocumentSheet) { // We only care when enabled sheets are removed NS_PRECONDITION(aStyleSheet, "Must have a style sheet!"); PRBool applicable; aStyleSheet->GetApplicable(applicable); if (applicable && aStyleSheet->HasRules()) { mStylesHaveChanged = PR_TRUE; } } void PresShell::StyleSheetApplicableStateChanged(nsIDocument *aDocument, nsIStyleSheet* aStyleSheet, PRBool aApplicable) { if (aStyleSheet->HasRules()) { mStylesHaveChanged = PR_TRUE; } } void PresShell::StyleRuleChanged(nsIDocument *aDocument, nsIStyleSheet* aStyleSheet, nsIStyleRule* aOldStyleRule, nsIStyleRule* aNewStyleRule) { mStylesHaveChanged = PR_TRUE; } void PresShell::StyleRuleAdded(nsIDocument *aDocument, nsIStyleSheet* aStyleSheet, nsIStyleRule* aStyleRule) { mStylesHaveChanged = PR_TRUE; } void PresShell::StyleRuleRemoved(nsIDocument *aDocument, nsIStyleSheet* aStyleSheet, nsIStyleRule* aStyleRule) { mStylesHaveChanged = PR_TRUE; } nsIFrame* PresShell::GetPrimaryFrameFor(nsIContent* aContent) const { return FrameManager()->GetPrimaryFrameFor(aContent, -1); } nsIFrame* PresShell::GetRealPrimaryFrameFor(nsIContent* aContent) const { nsIFrame *primaryFrame = FrameManager()->GetPrimaryFrameFor(aContent, -1); if (!primaryFrame) return nsnull; return nsPlaceholderFrame::GetRealFrameFor(primaryFrame); } NS_IMETHODIMP PresShell::GetLayoutObjectFor(nsIContent* aContent, nsISupports** aResult) const { nsresult result = NS_ERROR_NULL_POINTER; if ((nsnull!=aResult) && (nsnull!=aContent)) { *aResult = nsnull; nsIFrame *primaryFrame = GetPrimaryFrameFor(aContent); if (primaryFrame) { result = primaryFrame->QueryInterface(NS_GET_IID(nsISupports), (void**)aResult); } } return result; } NS_IMETHODIMP PresShell::GetPlaceholderFrameFor(nsIFrame* aFrame, nsIFrame** aResult) const { *aResult = FrameManager()->GetPlaceholderFrameFor(aFrame); return NS_OK; } //nsIViewObserver NS_IMETHODIMP PresShell::ComputeRepaintRegionForCopy(nsIView* aRootView, nsIView* aMovingView, nsPoint aDelta, const nsRect& aCopyRect, nsRegion* aRepaintRegion) { return nsLayoutUtils::ComputeRepaintRegionForCopy( static_cast(aRootView->GetClientData()), static_cast(aMovingView->GetClientData()), aDelta, aCopyRect, aRepaintRegion); } NS_IMETHODIMP PresShell::RenderDocument(const nsRect& aRect, PRBool aUntrusted, PRBool aIgnoreViewportScrolling, nscolor aBackgroundColor, gfxContext* aThebesContext) { NS_ENSURE_TRUE(!aUntrusted, NS_ERROR_NOT_IMPLEMENTED); gfxRect r(0, 0, nsPresContext::AppUnitsToFloatCSSPixels(aRect.width), nsPresContext::AppUnitsToFloatCSSPixels(aRect.height)); aThebesContext->Save(); aThebesContext->Clip(r); aThebesContext->PushGroup(NS_GET_A(aBackgroundColor) == 0xff ? gfxASurface::CONTENT_COLOR : gfxASurface::CONTENT_COLOR_ALPHA); aThebesContext->Save(); // draw background color if (NS_GET_A(aBackgroundColor) > 0) { aThebesContext->SetColor(gfxRGBA(aBackgroundColor)); aThebesContext->SetOperator(gfxContext::OPERATOR_SOURCE); aThebesContext->Paint(); } // we want the window to be composited as a single image using // whatever operator was set, so set this to the default OVER; // the original operator will be present when we PopGroup aThebesContext->SetOperator(gfxContext::OPERATOR_OVER); nsIFrame* rootFrame = FrameManager()->GetRootFrame(); if (rootFrame) { nsDisplayListBuilder builder(rootFrame, PR_FALSE, PR_FALSE); nsDisplayList list; nsRect rect(aRect); nsIFrame* rootScrollFrame = GetRootScrollFrame(); if (aIgnoreViewportScrolling && rootScrollFrame) { nsPoint pos = GetRootScrollFrameAsScrollable()->GetScrollPosition(); rect.MoveBy(-pos); builder.SetIgnoreScrollFrame(rootScrollFrame); } builder.EnterPresShell(rootFrame, rect); nsresult rv = rootFrame->BuildDisplayListForStackingContext(&builder, rect, &list); builder.LeavePresShell(rootFrame, rect); if (NS_SUCCEEDED(rv)) { // Ensure that r.x,r.y gets drawn at (0,0) aThebesContext->Save(); aThebesContext->Translate(gfxPoint(-nsPresContext::AppUnitsToFloatCSSPixels(rect.x), -nsPresContext::AppUnitsToFloatCSSPixels(rect.y))); nsIDeviceContext* devCtx = mPresContext->DeviceContext(); gfxFloat scale = gfxFloat(devCtx->AppUnitsPerDevPixel())/nsPresContext::AppUnitsPerCSSPixel(); aThebesContext->Scale(scale, scale); nsCOMPtr rc; devCtx->CreateRenderingContextInstance(*getter_AddRefs(rc)); rc->Init(devCtx, aThebesContext); nsRegion region(rect); list.OptimizeVisibility(&builder, ®ion); list.Paint(&builder, rc, rect); // Flush the list so we don't trigger the IsEmpty-on-destruction assertion list.DeleteAll(); aThebesContext->Restore(); } } aThebesContext->Restore(); aThebesContext->PopGroupToSource(); aThebesContext->Paint(); aThebesContext->Restore(); return NS_OK; } /* * Clip the display list aList to a range. Returns the clipped * rectangle surrounding the range. */ nsRect PresShell::ClipListToRange(nsDisplayListBuilder *aBuilder, nsDisplayList* aList, nsIRange* aRange) { // iterate though the display items and add up the bounding boxes of each. // This will allow the total area of the frames within the range to be // determined. To do this, remove an item from the bottom of the list, check // whether it should be part of the range, and if so, append it to the top // of the temporary list tmpList. If the item is a text frame at the end of // the selection range, wrap it in an nsDisplayClip to clip the display to // the portion of the text frame that is part of the selection. Then, append // the wrapper to the top of the list. Otherwise, just delete the item and // don't append it. nsRect surfaceRect; nsDisplayList tmpList; nsDisplayItem* i; while ((i = aList->RemoveBottom())) { // itemToInsert indiciates the item that should be inserted into the // temporary list. If null, no item should be inserted. nsDisplayItem* itemToInsert = nsnull; nsIFrame* frame = i->GetUnderlyingFrame(); if (frame) { nsIContent* content = frame->GetContent(); if (content) { PRBool atStart = (content == aRange->GetStartParent()); PRBool atEnd = (content == aRange->GetEndParent()); if ((atStart || atEnd) && frame->GetType() == nsGkAtoms::textFrame) { PRInt32 frameStartOffset, frameEndOffset; frame->GetOffsets(frameStartOffset, frameEndOffset); PRInt32 hilightStart = atStart ? PR_MAX(aRange->StartOffset(), frameStartOffset) : frameStartOffset; PRInt32 hilightEnd = atEnd ? PR_MIN(aRange->EndOffset(), frameEndOffset) : frameEndOffset; if (hilightStart < hilightEnd) { // determine the location of the start and end edges of the range. nsPoint startPoint, endPoint; frame->GetPointFromOffset(hilightStart, &startPoint); frame->GetPointFromOffset(hilightEnd, &endPoint); // the clip rectangle is determined by taking the the start and // end points of the range, offset from the reference frame. // Because of rtl, the end point may be to the left of the // start point, so x is set to the lowest value nsRect textRect(aBuilder->ToReferenceFrame(frame), frame->GetSize()); nscoord x = PR_MIN(startPoint.x, endPoint.x); textRect.x += x; textRect.width = PR_MAX(startPoint.x, endPoint.x) - x; surfaceRect.UnionRect(surfaceRect, textRect); // wrap the item in an nsDisplayClip so that it can be clipped to // the selection. If the allocation fails, fall through and delete // the item below. itemToInsert = new (aBuilder)nsDisplayClip(frame, i, textRect); } } else { // if the node is within the range, append it to the temporary list PRBool before, after; nsRange::CompareNodeToRange(content, aRange, &before, &after); if (!before && !after) { itemToInsert = i; surfaceRect.UnionRect(surfaceRect, i->GetBounds(aBuilder)); } } } } // insert the item into the list if necessary. If the item has a child // list, insert that as well nsDisplayList* sublist = i->GetList(); if (itemToInsert || sublist) { tmpList.AppendToTop(itemToInsert ? itemToInsert : i); // if the item is a list, iterate over it as well if (sublist) surfaceRect.UnionRect(surfaceRect, ClipListToRange(aBuilder, sublist, aRange)); } else { // otherwise, just delete the item and don't readd it to the list i->~nsDisplayItem(); } } // now add all the items back onto the original list again aList->AppendToTop(&tmpList); return surfaceRect; } RangePaintInfo* PresShell::CreateRangePaintInfo(nsIDOMRange* aRange, nsRect& aSurfaceRect) { RangePaintInfo* info = nsnull; nsCOMPtr range = do_QueryInterface(aRange); if (!range) return nsnull; nsIFrame* ancestorFrame; nsIFrame* rootFrame = GetRootFrame(); // If the start or end of the range is the document, just use the root // frame, otherwise get the common ancestor of the two endpoints of the // range. nsINode* startParent = range->GetStartParent(); nsINode* endParent = range->GetEndParent(); nsIDocument* doc = startParent->GetCurrentDoc(); if (startParent == doc || endParent == doc) { ancestorFrame = rootFrame; } else { nsINode* ancestor = nsContentUtils::GetCommonAncestor(startParent, endParent); NS_ASSERTION(!ancestor || ancestor->IsNodeOfType(nsINode::eCONTENT), "common ancestor is not content"); if (!ancestor || !ancestor->IsNodeOfType(nsINode::eCONTENT)) return nsnull; nsIContent* ancestorContent = static_cast(ancestor); ancestorFrame = GetPrimaryFrameFor(ancestorContent); // use the nearest ancestor frame that includes all continuations as the // root for building the display list while (ancestorFrame && nsLayoutUtils::GetNextContinuationOrSpecialSibling(ancestorFrame)) ancestorFrame = ancestorFrame->GetParent(); } if (!ancestorFrame) return nsnull; info = new RangePaintInfo(range, ancestorFrame); if (!info) return nsnull; nsRect ancestorRect = ancestorFrame->GetOverflowRect(); // get a display list containing the range info->mBuilder.SetPaintAllFrames(); info->mBuilder.EnterPresShell(ancestorFrame, ancestorRect); ancestorFrame->BuildDisplayListForStackingContext(&info->mBuilder, ancestorRect, &info->mList); info->mBuilder.LeavePresShell(ancestorFrame, ancestorRect); nsRect rangeRect = ClipListToRange(&info->mBuilder, &info->mList, range); // determine the offset of the reference frame for the display list // to the root frame. This will allow the coordinates used when painting // to all be offset from the same point info->mRootOffset = ancestorFrame->GetOffsetTo(rootFrame); rangeRect.MoveBy(info->mRootOffset); aSurfaceRect.UnionRect(aSurfaceRect, rangeRect); return info; } already_AddRefed PresShell::PaintRangePaintInfo(nsTArray >* aItems, nsISelection* aSelection, nsIRegion* aRegion, nsRect aArea, nsPoint& aPoint, nsRect* aScreenRect) { nsPresContext* pc = GetPresContext(); if (!pc || aArea.width == 0 || aArea.height == 0) return nsnull; nsIDeviceContext* deviceContext = pc->DeviceContext(); // use the rectangle to create the surface nsRect pixelArea = aArea; pixelArea.ScaleRoundOut(1.0 / pc->AppUnitsPerDevPixel()); // if the area of the image is larger than the maximum area, scale it down float scale = 0.0; nsIntRect rootScreenRect = GetRootFrame()->GetScreenRect(); // if the image is larger in one or both directions than half the size of // the available screen area, scale the image down to that size. nsRect maxSize; deviceContext->GetClientRect(maxSize); nscoord maxWidth = pc->AppUnitsToDevPixels(maxSize.width >> 1); nscoord maxHeight = pc->AppUnitsToDevPixels(maxSize.height >> 1); PRBool resize = (pixelArea.width > maxWidth || pixelArea.height > maxHeight); if (resize) { scale = 1.0; // divide the maximum size by the image size in both directions. Whichever // direction produces the smallest result determines how much should be // scaled. if (pixelArea.width > maxWidth) scale = PR_MIN(scale, float(maxWidth) / pixelArea.width); if (pixelArea.height > maxHeight) scale = PR_MIN(scale, float(maxHeight) / pixelArea.height); pixelArea.width = NSToIntFloor(float(pixelArea.width) * scale); pixelArea.height = NSToIntFloor(float(pixelArea.height) * scale); // adjust the screen position based on the rescaled size nscoord left = rootScreenRect.x + pixelArea.x; nscoord top = rootScreenRect.y + pixelArea.y; aScreenRect->x = NSToIntFloor(aPoint.x - float(aPoint.x - left) * scale); aScreenRect->y = NSToIntFloor(aPoint.y - float(aPoint.y - top) * scale); } else { // move aScreenRect to the position of the surface in screen coordinates aScreenRect->MoveTo(rootScreenRect.x + pixelArea.x, rootScreenRect.y + pixelArea.y); } aScreenRect->width = pixelArea.width; aScreenRect->height = pixelArea.height; gfxImageSurface* surface = new gfxImageSurface(gfxIntSize(pixelArea.width, pixelArea.height), gfxImageSurface::ImageFormatARGB32); if (!surface || surface->CairoStatus()) { delete surface; return nsnull; } // clear the image gfxContext context(surface); context.SetOperator(gfxContext::OPERATOR_CLEAR); context.Rectangle(gfxRect(0, 0, pixelArea.width, pixelArea.height)); context.Fill(); nsCOMPtr rc; deviceContext->CreateRenderingContextInstance(*getter_AddRefs(rc)); rc->Init(deviceContext, surface); if (aRegion) rc->SetClipRegion(*aRegion, nsClipCombine_kReplace); if (resize) rc->Scale(scale, scale); // translate so that points are relative to the surface area rc->Translate(-aArea.x, -aArea.y); // temporarily hide the selection so that text is drawn normally. If a // selection is being rendered, use that, otherwise use the presshell's // selection. nsCOMPtr frameSelection; if (aSelection) { nsCOMPtr selpriv = do_QueryInterface(aSelection); selpriv->GetFrameSelection(getter_AddRefs(frameSelection)); } else { frameSelection = FrameSelection(); } PRInt16 oldDisplaySelection = frameSelection->GetDisplaySelection(); frameSelection->SetDisplaySelection(nsISelectionController::SELECTION_HIDDEN); // next, paint each range in the selection PRInt32 count = aItems->Length(); for (PRInt32 i = 0; i < count; i++) { RangePaintInfo* rangeInfo = (*aItems)[i]; // the display lists paint relative to the offset from the reference // frame, so translate the rendering context nsIRenderingContext::AutoPushTranslation translate(rc, rangeInfo->mRootOffset.x, rangeInfo->mRootOffset.y); aArea.MoveBy(-rangeInfo->mRootOffset.x, -rangeInfo->mRootOffset.y); rangeInfo->mList.Paint(&rangeInfo->mBuilder, rc, aArea); aArea.MoveBy(rangeInfo->mRootOffset.x, rangeInfo->mRootOffset.y); } // restore the old selection display state frameSelection->SetDisplaySelection(oldDisplaySelection); NS_ADDREF(surface); return surface; } already_AddRefed PresShell::RenderNode(nsIDOMNode* aNode, nsIRegion* aRegion, nsPoint& aPoint, nsRect* aScreenRect) { // area will hold the size of the surface needed to draw the node, measured // from the root frame. nsRect area; nsTArray > rangeItems; nsCOMPtr range; NS_NewRange(getter_AddRefs(range)); range->SelectNode(aNode); RangePaintInfo* info = CreateRangePaintInfo(range, area); if (info && !rangeItems.AppendElement(info)) { delete info; return nsnull; } if (aRegion) { // combine the area with the supplied region nsRect rrectPixels; aRegion->GetBoundingBox(&rrectPixels.x, &rrectPixels.y, &rrectPixels.width, &rrectPixels.height); nsRect rrect = rrectPixels; rrect.ScaleRoundOut(nsPresContext::AppUnitsPerCSSPixel()); area.IntersectRect(area, rrect); nsPresContext* pc = GetPresContext(); if (!pc) return nsnull; // move the region so that it is offset from the topleft corner of the surface aRegion->Offset(-rrectPixels.x + (rrectPixels.x - pc->AppUnitsToDevPixels(area.x)), -rrectPixels.y + (rrectPixels.y - pc->AppUnitsToDevPixels(area.y))); } return PaintRangePaintInfo(&rangeItems, nsnull, aRegion, area, aPoint, aScreenRect); } already_AddRefed PresShell::RenderSelection(nsISelection* aSelection, nsPoint& aPoint, nsRect* aScreenRect) { // area will hold the size of the surface needed to draw the selection, // measured from the root frame. nsRect area; nsTArray > rangeItems; // iterate over each range and collect them into the rangeItems array. // This is done so that the size of selection can be determined so as // to allocate a surface area PRInt32 numRanges; aSelection->GetRangeCount(&numRanges); NS_ASSERTION(numRanges > 0, "RenderSelection called with no selection"); for (PRInt32 r = 0; r < numRanges; r++) { nsCOMPtr range; aSelection->GetRangeAt(r, getter_AddRefs(range)); RangePaintInfo* info = CreateRangePaintInfo(range, area); if (info && !rangeItems.AppendElement(info)) { delete info; return nsnull; } } return PaintRangePaintInfo(&rangeItems, aSelection, nsnull, area, aPoint, aScreenRect); } NS_IMETHODIMP PresShell::Paint(nsIView* aView, nsIRenderingContext* aRenderingContext, const nsRegion& aDirtyRegion) { AUTO_LAYOUT_PHASE_ENTRY_POINT(GetPresContext(), Paint); nsIFrame* frame; nsresult rv = NS_OK; if (mIsDestroying) { NS_ASSERTION(PR_FALSE, "A paint message was dispatched to a destroyed PresShell"); return NS_OK; } NS_ASSERTION(!(nsnull == aView), "null view"); frame = static_cast(aView->GetClientData()); nscolor backgroundColor; mViewManager->GetDefaultBackgroundColor(&backgroundColor); for (nsIView *view = aView; view; view = view->GetParent()) { if (view->HasWidget()) { PRBool widgetIsTransparent; view->GetWidget()->GetHasTransparentBackground(widgetIsTransparent); if (widgetIsTransparent) { backgroundColor = NS_RGBA(0,0,0,0); break; } } } if (!frame) { if (NS_GET_A(backgroundColor) > 0) { aRenderingContext->SetColor(backgroundColor); aRenderingContext->FillRect(aDirtyRegion.GetBounds()); } return NS_OK; } nsLayoutUtils::PaintFrame(aRenderingContext, frame, aDirtyRegion, backgroundColor); return rv; } nsIFrame* PresShell::GetCurrentEventFrame() { if (!mCurrentEventFrame && mCurrentEventContent) { // Make sure the content still has a document reference. If not, // then we assume it is no longer in the content tree and the // frame shouldn't get an event, nor should we even assume its // safe to try and find the frame. if (mCurrentEventContent->GetDocument()) { mCurrentEventFrame = GetPrimaryFrameFor(mCurrentEventContent); } } return mCurrentEventFrame; } NS_IMETHODIMP PresShell::GetEventTargetFrame(nsIFrame** aFrame) { *aFrame = GetCurrentEventFrame(); return NS_OK; } NS_IMETHODIMP PresShell::GetEventTargetContent(nsEvent* aEvent, nsIContent** aContent) { if (mCurrentEventContent) { *aContent = mCurrentEventContent; NS_IF_ADDREF(*aContent); } else { nsIFrame* currentEventFrame = GetCurrentEventFrame(); if (currentEventFrame) { currentEventFrame->GetContentForEvent(mPresContext, aEvent, aContent); } else { *aContent = nsnull; } } return NS_OK; } void PresShell::PushCurrentEventInfo(nsIFrame* aFrame, nsIContent* aContent) { if (mCurrentEventFrame || mCurrentEventContent) { mCurrentEventFrameStack.InsertElementAt((void*)mCurrentEventFrame, 0); mCurrentEventContentStack.InsertObjectAt(mCurrentEventContent, 0); } mCurrentEventFrame = aFrame; mCurrentEventContent = aContent; } void PresShell::PopCurrentEventInfo() { mCurrentEventFrame = nsnull; mCurrentEventContent = nsnull; if (0 != mCurrentEventFrameStack.Count()) { mCurrentEventFrame = (nsIFrame*)mCurrentEventFrameStack.ElementAt(0); mCurrentEventFrameStack.RemoveElementAt(0); mCurrentEventContent = mCurrentEventContentStack.ObjectAt(0); mCurrentEventContentStack.RemoveObjectAt(0); } } PRBool PresShell::InZombieDocument(nsIContent *aContent) { // If a content node points to a null document, or the document is not // attached to a window, then it is possibly in a zombie document, // about to be replaced by a newly loading document. // Such documents cannot handle DOM events. // It might actually be in a node not attached to any document, // in which case there is not parent presshell to retarget it to. nsIDocument *doc = aContent->GetDocument(); return !doc || !doc->GetWindow(); } nsresult PresShell::RetargetEventToParent(nsGUIEvent* aEvent, nsEventStatus* aEventStatus) { // Send this events straight up to the parent pres shell. // We do this for keystroke events in zombie documents or if either a frame // or a root content is not present. // That way at least the UI key bindings can work. nsCOMPtr kungFuDeathGrip(this); nsCOMPtr container = mPresContext->GetContainer(); if (!container) container = do_QueryReferent(mForwardingContainer); // Now, find the parent pres shell and send the event there nsCOMPtr treeItem = do_QueryInterface(container); NS_ASSERTION(treeItem, "No tree item for container."); nsCOMPtr parentTreeItem; treeItem->GetParent(getter_AddRefs(parentTreeItem)); nsCOMPtr parentDocShell = do_QueryInterface(parentTreeItem); if (!parentDocShell || treeItem == parentTreeItem) { return NS_ERROR_FAILURE; } nsCOMPtr parentPresShell; parentDocShell->GetPresShell(getter_AddRefs(parentPresShell)); nsCOMPtr parentViewObserver = do_QueryInterface(parentPresShell); if (!parentViewObserver) { return NS_ERROR_FAILURE; } // Fake the event as though it'ss from the parent pres shell's root view. nsIView *parentRootView; parentPresShell->GetViewManager()->GetRootView(parentRootView); return parentViewObserver->HandleEvent(parentRootView, aEvent, aEventStatus); } NS_IMETHODIMP PresShell::HandleEvent(nsIView *aView, nsGUIEvent* aEvent, nsEventStatus* aEventStatus) { NS_ASSERTION(aView, "null view"); if (mIsDestroying || mIsReflowing || mChangeNestCount) { return NS_OK; } #ifdef ACCESSIBILITY if (aEvent->eventStructType == NS_ACCESSIBLE_EVENT) { return HandleEventInternal(aEvent, aView, aEventStatus); } #endif // Check for a theme change up front, since the frame type is irrelevant if (aEvent->message == NS_THEMECHANGED && mPresContext) { mPresContext->ThemeChanged(); return NS_OK; } // Check for a system color change up front, since the frame type is // irrelevant if ((aEvent->message == NS_SYSCOLORCHANGED) && mPresContext) { nsIViewManager* vm = GetViewManager(); if (vm) { // Only dispatch system color change when the message originates from // from the root views widget. This is necessary to prevent us from // dispatching the SysColorChanged notification for each child window // which may be redundant. nsIView *view; vm->GetRootView(view); if (view == aView) { *aEventStatus = nsEventStatus_eConsumeDoDefault; mPresContext->SysColorChanged(); return NS_OK; } } return NS_OK; } nsIFrame* frame = static_cast(aView->GetClientData()); PRBool dispatchUsingCoordinates = !NS_IS_KEY_EVENT(aEvent) && !NS_IS_IME_EVENT(aEvent) && !NS_IS_CONTEXT_MENU_KEY(aEvent) && !NS_IS_FOCUS_EVENT(aEvent); // if this event has no frame, we need to retarget it at a parent // view that has a frame. if (!frame && (dispatchUsingCoordinates || NS_IS_KEY_EVENT(aEvent) || NS_IS_IME_EVENT(aEvent))) { nsIView* targetView = aView; while (targetView && !targetView->GetClientData()) { targetView = targetView->GetParent(); } if (targetView) { aView = targetView; frame = static_cast(aView->GetClientData()); } } if (dispatchUsingCoordinates) { NS_ASSERTION(frame, "Nothing to handle this event!"); if (!frame) return NS_OK; nsPresContext* framePresContext = frame->PresContext(); nsPresContext* rootPresContext = framePresContext->RootPresContext(); NS_ASSERTION(rootPresContext == mPresContext->RootPresContext(), "How did we end up outside the connected prescontext/viewmanager hierarchy?"); // If we aren't starting our event dispatch from the root frame of the root prescontext, // then someone must be capturing the mouse. In that case we don't want to search the popup // list. if (framePresContext == rootPresContext && frame == FrameManager()->GetRootFrame()) { #ifdef MOZ_XUL nsXULPopupManager* pm = nsXULPopupManager::GetInstance(); if (pm) { nsTArray popups = pm->GetOpenPopups(); PRUint32 i; // Search from top to bottom for (i = 0; i < popups.Length(); i++) { nsIFrame* popup = popups[i]; if (popup->GetOverflowRect().Contains( nsLayoutUtils::GetEventCoordinatesRelativeTo(aEvent, popup))) { // The event should target the popup frame = popup; break; } } } #endif } nsPoint eventPoint = nsLayoutUtils::GetEventCoordinatesRelativeTo(aEvent, frame); nsIFrame* targetFrame; { nsAutoDisableGetUsedXAssertions disableAssert; targetFrame = nsLayoutUtils::GetFrameForPoint(frame, eventPoint); } if (targetFrame) { PresShell* shell = static_cast(targetFrame->PresContext()->PresShell()); if (shell != this) { // Handle the event in the correct shell. // Prevent deletion until we're done with event handling (bug 336582). nsCOMPtr kungFuDeathGrip(shell); nsIView* subshellRootView; shell->GetViewManager()->GetRootView(subshellRootView); // We pass the subshell's root view as the view to start from. This is // the only correct alternative; if the event was captured then it // must have been captured by us or some ancestor shell and we // now ask the subshell to dispatch it normally. return shell->HandlePositionedEvent(subshellRootView, targetFrame, aEvent, aEventStatus); } } if (!targetFrame) { targetFrame = frame; } return HandlePositionedEvent(aView, targetFrame, aEvent, aEventStatus); } nsresult rv = NS_OK; if (frame) { PushCurrentEventInfo(nsnull, nsnull); // key and IME events go to the focused frame nsIEventStateManager *esm = mPresContext->EventStateManager(); if (NS_IS_KEY_EVENT(aEvent) || NS_IS_IME_EVENT(aEvent) || NS_IS_CONTEXT_MENU_KEY(aEvent)) { esm->GetFocusedFrame(&mCurrentEventFrame); if (mCurrentEventFrame) { esm->GetFocusedContent(getter_AddRefs(mCurrentEventContent)); } else { #if defined(MOZ_X11) || defined(XP_WIN) #if defined(MOZ_X11) if (NS_IS_IME_EVENT(aEvent)) { // bug 52416 (MOZ_X11) // Lookup region (candidate window) of UNIX IME grabs // input focus from Mozilla but wants to send IME event // to redraw pre-edit (composed) string // If Mozilla does not have input focus and event is IME, // sends IME event to pre-focused element #else if (NS_IS_KEY_EVENT(aEvent) || NS_IS_IME_EVENT(aEvent)) { // bug 292263 (XP_WIN) // If software keyboard has focus, it may send the key messages and // the IME messages to pre-focused window. Therefore, if Mozilla // doesn't have focus and event is key event or IME event, we should // send the events to pre-focused element. #endif /* defined(MOZ_X11) */ nsPIDOMWindow *ourWindow = mDocument->GetWindow(); if (ourWindow) { nsIFocusController *focusController = ourWindow->GetRootFocusController(); if (focusController) { PRBool active = PR_FALSE; // check input focus is in Mozilla focusController->GetActive(&active); if (!active) { // if not, search for pre-focused element nsCOMPtr focusedElement; focusController->GetFocusedElement(getter_AddRefs(focusedElement)); if (focusedElement) { // get mCurrentEventContent from focusedElement mCurrentEventContent = do_QueryInterface(focusedElement); } } } } } #endif /* defined(MOZ_X11) || defined(XP_WIN) */ if (!mCurrentEventContent) { mCurrentEventContent = mDocument->GetRootContent(); } mCurrentEventFrame = nsnull; // XXXldb Isn't it already? } if (!mCurrentEventContent || InZombieDocument(mCurrentEventContent)) { rv = RetargetEventToParent(aEvent, aEventStatus); PopCurrentEventInfo(); return rv; } } else { mCurrentEventFrame = frame; } if (GetCurrentEventFrame()) { rv = HandleEventInternal(aEvent, aView, aEventStatus); } #ifdef NS_DEBUG ShowEventTargetDebug(); #endif PopCurrentEventInfo(); } else { // Focus events need to be dispatched even if no frame was found, since // we don't want the focus controller to be out of sync. if (!NS_EVENT_NEEDS_FRAME(aEvent)) { mCurrentEventFrame = nsnull; return HandleEventInternal(aEvent, aView, aEventStatus); } else if (NS_IS_KEY_EVENT(aEvent)) { // Keypress events in new blank tabs should not be completely thrown away. // Retarget them -- the parent chrome shell might make use of them. return RetargetEventToParent(aEvent, aEventStatus); } } return rv; } #ifdef NS_DEBUG void PresShell::ShowEventTargetDebug() { if (nsIFrameDebug::GetShowEventTargetFrameBorder() && GetCurrentEventFrame()) { if (mDrawEventTargetFrame) { mDrawEventTargetFrame->Invalidate( nsRect(nsPoint(0, 0), mDrawEventTargetFrame->GetSize())); } mDrawEventTargetFrame = mCurrentEventFrame; mDrawEventTargetFrame->Invalidate( nsRect(nsPoint(0, 0), mDrawEventTargetFrame->GetSize())); } } #endif nsresult PresShell::HandlePositionedEvent(nsIView* aView, nsIFrame* aTargetFrame, nsGUIEvent* aEvent, nsEventStatus* aEventStatus) { nsresult rv = NS_OK; PushCurrentEventInfo(nsnull, nsnull); mCurrentEventFrame = aTargetFrame; if (mCurrentEventFrame) { nsCOMPtr targetElement; mCurrentEventFrame->GetContentForEvent(mPresContext, aEvent, getter_AddRefs(targetElement)); // If there is no content for this frame, target it anyway. Some // frames can be targeted but do not have content, particularly // windows with scrolling off. if (targetElement) { // Bug 103055, bug 185889: mouse events apply to *elements*, not all // nodes. Thus we get the nearest element parent here. // XXX we leave the frame the same even if we find an element // parent, so that the text frame will receive the event (selection // and friends are the ones who care about that anyway) // // We use weak pointers because during this tight loop, the node // will *not* go away. And this happens on every mousemove. while (targetElement && !targetElement->IsNodeOfType(nsINode::eELEMENT)) { targetElement = targetElement->GetParent(); } // If we found an element, target it. Otherwise, target *nothing*. if (!targetElement) { mCurrentEventContent = nsnull; mCurrentEventFrame = nsnull; } else if (targetElement != mCurrentEventContent) { mCurrentEventContent = targetElement; } } } if (GetCurrentEventFrame()) { rv = HandleEventInternal(aEvent, aView, aEventStatus); } #ifdef NS_DEBUG ShowEventTargetDebug(); #endif PopCurrentEventInfo(); return rv; } NS_IMETHODIMP PresShell::HandleEventWithTarget(nsEvent* aEvent, nsIFrame* aFrame, nsIContent* aContent, nsEventStatus* aStatus) { nsresult ret; PushCurrentEventInfo(aFrame, aContent); ret = HandleEventInternal(aEvent, nsnull, aStatus); PopCurrentEventInfo(); return NS_OK; } inline PRBool IsSynthesizedMouseMove(nsEvent* aEvent) { return aEvent->eventStructType == NS_MOUSE_EVENT && static_cast(aEvent)->reason != nsMouseEvent::eReal; } nsresult PresShell::HandleEventInternal(nsEvent* aEvent, nsIView *aView, nsEventStatus* aStatus) { #ifdef ACCESSIBILITY if (aEvent->eventStructType == NS_ACCESSIBLE_EVENT) { static_cast(aEvent)->accessible = nsnull; nsCOMPtr accService = do_GetService("@mozilla.org/accessibilityService;1"); if (accService) { nsCOMPtr container = mPresContext->GetContainer(); if (!container) { // This presshell is not active. This often happens when a // preshell is being held onto for fastback. return NS_OK; } nsIAccessible* acc; nsCOMPtr domNode(do_QueryInterface(mDocument)); NS_ASSERTION(domNode, "No dom node for doc"); accService->GetAccessibleInShell(domNode, this, &acc); // Addref this - it's not a COM Ptr // We'll make sure the right number of Addref's occur before // handing this back to the accessibility client static_cast(aEvent)->accessible = acc; // Ensure this is set in case a11y was activated before any // nsPresShells existed to observe "a11y-init-or-shutdown" topic gIsAccessibilityActive = PR_TRUE; return NS_OK; } } #endif nsCOMPtr manager = mPresContext->EventStateManager(); nsresult rv = NS_OK; if (!NS_EVENT_NEEDS_FRAME(aEvent) || GetCurrentEventFrame()) { PRBool isHandlingUserInput = PR_FALSE; if (NS_IS_TRUSTED_EVENT(aEvent)) { switch (aEvent->message) { case NS_GOTFOCUS: case NS_LOSTFOCUS: case NS_ACTIVATE: case NS_DEACTIVATE: // Treat focus/blur events as user input if they happen while // executing trusted script, or no script at all. If they // happen during execution of non-trusted script, then they // should not be considered user input. if (!nsContentUtils::IsCallerChrome()) { break; } case NS_MOUSE_BUTTON_DOWN: case NS_MOUSE_BUTTON_UP: case NS_KEY_PRESS: case NS_KEY_DOWN: case NS_KEY_UP: isHandlingUserInput = PR_TRUE; } } nsAutoHandlingUserInputStatePusher userInpStatePusher(isHandlingUserInput); nsAutoPopupStatePusher popupStatePusher(nsDOMEvent::GetEventPopupControlState(aEvent)); // FIXME. If the event was reused, we need to clear the old target, // bug 329430 aEvent->target = nsnull; nsWeakView weakView(aView); // 1. Give event to event manager for pre event state changes and // generation of synthetic events. rv = manager->PreHandleEvent(mPresContext, aEvent, mCurrentEventFrame, aStatus, aView); // 2. Give event to the DOM for third party and JS use. if ((GetCurrentEventFrame()) && NS_SUCCEEDED(rv)) { // We want synthesized mouse moves to cause mouseover and mouseout // DOM events (PreHandleEvent above), but not mousemove DOM events. if (!IsSynthesizedMouseMove(aEvent)) { nsPresShellEventCB eventCB(this); if (mCurrentEventContent) { nsEventDispatcher::Dispatch(mCurrentEventContent, mPresContext, aEvent, nsnull, aStatus, &eventCB); } else { nsCOMPtr targetContent; rv = mCurrentEventFrame->GetContentForEvent(mPresContext, aEvent, getter_AddRefs(targetContent)); if (NS_SUCCEEDED(rv) && targetContent) { nsEventDispatcher::Dispatch(targetContent, mPresContext, aEvent, nsnull, aStatus, &eventCB); } else if (mDocument) { nsEventDispatcher::Dispatch(mDocument, mPresContext, aEvent, nsnull, aStatus, nsnull); } } } // 3. Give event to event manager for post event state changes and // generation of synthetic events. if (NS_SUCCEEDED(rv)) { rv = manager->PostHandleEvent(mPresContext, aEvent, GetCurrentEventFrame(), aStatus, weakView.GetView()); } } } return rv; } // Dispatch event to content only (NOT full processing) // See also HandleEventWithTarget which does full event processing. NS_IMETHODIMP PresShell::HandleDOMEventWithTarget(nsIContent* aTargetContent, nsEvent* aEvent, nsEventStatus* aStatus) { PushCurrentEventInfo(nsnull, aTargetContent); // Bug 41013: Check if the event should be dispatched to content. // It's possible that we are in the middle of destroying the window // and the js context is out of date. This check detects the case // that caused a crash in bug 41013, but there may be a better way // to handle this situation! nsCOMPtr container = mPresContext->GetContainer(); if (container) { // Dispatch event to content nsEventDispatcher::Dispatch(aTargetContent, mPresContext, aEvent, nsnull, aStatus); } PopCurrentEventInfo(); return NS_OK; } NS_IMETHODIMP PresShell::ResizeReflow(nsIView *aView, nscoord aWidth, nscoord aHeight) { return ResizeReflow(aWidth, aHeight); } NS_IMETHODIMP_(PRBool) PresShell::IsVisible() { nsCOMPtr container = mPresContext->GetContainer(); nsCOMPtr bw = do_QueryInterface(container); if (!bw) return PR_FALSE; PRBool res = PR_TRUE; bw->GetVisibility(&res); return res; } NS_IMETHODIMP_(void) PresShell::WillPaint() { // Don't reenter reflow and don't reflow during frame construction. Also // don't bother reflowing if some viewmanager in our tree is painting while // we still have painting suppressed. if (mIsReflowing || mChangeNestCount || mPaintingSuppressed) { return; } // Process reflows, if we have them, to reduce flicker due to invalidates and // reflow being interspersed. Note that we _do_ allow this to be // interruptible; if we can't do all the reflows it's better to flicker a bit // than to freeze up. DoFlushPendingNotifications(Flush_Layout, PR_TRUE); } nsresult PresShell::GetAgentStyleSheets(nsCOMArray& aSheets) { aSheets.Clear(); PRInt32 sheetCount = mStyleSet->SheetCount(nsStyleSet::eAgentSheet); for (PRInt32 i = 0; i < sheetCount; ++i) { nsIStyleSheet *sheet = mStyleSet->StyleSheetAt(nsStyleSet::eAgentSheet, i); if (!aSheets.AppendObject(sheet)) return NS_ERROR_OUT_OF_MEMORY; } return NS_OK; } nsresult PresShell::SetAgentStyleSheets(const nsCOMArray& aSheets) { return mStyleSet->ReplaceSheets(nsStyleSet::eAgentSheet, aSheets); } nsresult PresShell::AddOverrideStyleSheet(nsIStyleSheet *aSheet) { return mStyleSet->PrependStyleSheet(nsStyleSet::eOverrideSheet, aSheet); } nsresult PresShell::RemoveOverrideStyleSheet(nsIStyleSheet *aSheet) { return mStyleSet->RemoveStyleSheet(nsStyleSet::eOverrideSheet, aSheet); } static void StopPluginInstance(PresShell *aShell, nsIContent *aContent) { nsIFrame *frame = aShell->FrameManager()->GetPrimaryFrameFor(aContent, -1); nsIObjectFrame *objectFrame = nsnull; if (frame) CallQueryInterface(frame, &objectFrame); if (!objectFrame) return; objectFrame->StopPlugin(); } PR_STATIC_CALLBACK(PRBool) FreezeSubDocument(nsIDocument *aDocument, void *aData) { nsIPresShell *shell = aDocument->GetPrimaryShell(); if (shell) shell->Freeze(); return PR_TRUE; } void PresShell::Freeze() { nsCOMPtr domDoc = do_QueryInterface(mDocument); if (domDoc) { EnumeratePlugins(domDoc, NS_LITERAL_STRING("object"), StopPluginInstance); EnumeratePlugins(domDoc, NS_LITERAL_STRING("applet"), StopPluginInstance); EnumeratePlugins(domDoc, NS_LITERAL_STRING("embed"), StopPluginInstance); } if (mCaret) mCaret->SetCaretVisible(PR_FALSE); mPaintingSuppressed = PR_TRUE; if (mDocument) mDocument->EnumerateSubDocuments(FreezeSubDocument, nsnull); } static void StartPluginInstance(PresShell *aShell, nsIContent *aContent) { nsCOMPtr objlc(do_QueryInterface(aContent)); if (!objlc) return; nsCOMPtr inst; objlc->EnsureInstantiation(getter_AddRefs(inst)); } PR_STATIC_CALLBACK(PRBool) ThawSubDocument(nsIDocument *aDocument, void *aData) { nsIPresShell *shell = aDocument->GetPrimaryShell(); if (shell) shell->Thaw(); return PR_TRUE; } void PresShell::Thaw() { nsCOMPtr domDoc = do_QueryInterface(mDocument); if (domDoc) { EnumeratePlugins(domDoc, NS_LITERAL_STRING("object"), StartPluginInstance); EnumeratePlugins(domDoc, NS_LITERAL_STRING("applet"), StartPluginInstance); EnumeratePlugins(domDoc, NS_LITERAL_STRING("embed"), StartPluginInstance); } if (mDocument) mDocument->EnumerateSubDocuments(ThawSubDocument, nsnull); UnsuppressPainting(); } //-------------------------------------------------------- // Start of protected and private methods on the PresShell //-------------------------------------------------------- //-------------- Begin Reflow Event Definition ------------------------ NS_IMETHODIMP PresShell::ReflowEvent::Run() { // Take an owning reference to the PresShell during this call to ensure // that it doesn't get killed off prematurely. nsRefPtr ps = mPresShell; if (ps) { #ifdef DEBUG if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) { printf("\n*** Handling reflow event: PresShell=%p, event=%p\n", (void*)ps, (void*)this); } #endif // NOTE: the ReflowEvent class is a friend of the PresShell class ps->ClearReflowEventStatus(); // Set a kung fu death grip on the view manager associated with the pres shell // before processing that pres shell's reflow commands. Fixes bug 54868. nsCOMPtr viewManager = ps->GetViewManager(); ps->DoFlushPendingNotifications(Flush_Layout, PR_TRUE); // Now, explicitly release the pres shell before the view manager ps = nsnull; viewManager = nsnull; } return NS_OK; } //-------------- End Reflow Event Definition --------------------------- void PresShell::PostReflowEvent() { if (mReflowEvent.IsPending() || mIsDestroying || mIsReflowing || mDirtyRoots.Count() == 0) return; nsRefPtr ev = new ReflowEvent(this); if (NS_FAILED(NS_DispatchToCurrentThread(ev))) { NS_WARNING("failed to dispatch reflow event"); } else { mReflowEvent = ev; #ifdef DEBUG if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) { printf("\n*** PresShell::PostReflowEvent(), this=%p, event=%p\n", (void*)this, (void*)ev); } #endif } } nsresult PresShell::DidCauseReflow() { NS_ASSERTION(mChangeNestCount != 0, "Unexpected call to DidCauseReflow()"); if (--mChangeNestCount == 0) { // We may have had more reflow commands appended to the queue during // our reflow. Make sure these get processed at some point. // XXXbz why is this really needed? ProcessReflowCommands handles posting // reflow events if there are reflow roots remaining, and FrameNeedsReflow // posts events as needed as well. I think we should remove this. PostReflowEvent(); } return NS_OK; } void PresShell::WillDoReflow() { // We just reflowed, tell the caret that its frame might have moved. // XXXbz that comment makes no sense if (mCaret) { mCaret->InvalidateOutsideCaret(); mCaret->UpdateCaretPosition(); } mFrameConstructor->BeginUpdate(); } void PresShell::DidDoReflow() { mFrameConstructor->EndUpdate(); HandlePostedReflowCallbacks(); // Null-check mViewManager in case this happens during Destroy. See // bugs 244435 and 238546. if (!mPaintingSuppressed && mViewManager) mViewManager->SynthesizeMouseMove(PR_FALSE); if (mCaret) { // Update the caret's position now to account for any changes created by // the reflow. mCaret->InvalidateOutsideCaret(); mCaret->UpdateCaretPosition(); } } void PresShell::DoReflow(nsIFrame* target) { nsIFrame* rootFrame = FrameManager()->GetRootFrame(); nsCOMPtr rcx; // Always create the rendering context relative to the root frame during // reflow; otherwise, it crashes on the mac (I'm not quite sure why) nsresult rv = CreateRenderingContext(rootFrame, getter_AddRefs(rcx)); if (NS_FAILED(rv)) { NS_NOTREACHED("CreateRenderingContext failure"); return; } target->WillReflow(mPresContext); // If the target frame is the root of the frame hierarchy, then // use all the available space. If it's simply a `reflow root', // then use the target frame's size as the available space. nsSize size; if (target == rootFrame) size = mPresContext->GetVisibleArea().Size(); else size = target->GetSize(); NS_ASSERTION(!target->GetNextInFlow() && !target->GetPrevInFlow(), "reflow roots should never split"); // Don't pass size directly to the reflow state, since a // constrained height implies page/column breaking. // Exception: the root frame always uses a constrained reflow nsSize reflowSize; if (target != rootFrame) reflowSize = nsSize(size.width, NS_UNCONSTRAINEDSIZE); else reflowSize = size; nsHTMLReflowState reflowState(mPresContext, target, rcx, reflowSize); // fix the computed height NS_ASSERTION(reflowState.mComputedMargin == nsMargin(0, 0, 0, 0), "reflow state should not set margin for reflow roots"); if (size.height != NS_UNCONSTRAINEDSIZE) { nscoord computedHeight = size.height - reflowState.mComputedBorderPadding.TopBottom(); computedHeight = PR_MAX(computedHeight, 0); reflowState.SetComputedHeight(computedHeight); } NS_ASSERTION(reflowState.ComputedWidth() == size.width - reflowState.mComputedBorderPadding.LeftRight(), "reflow state computed incorrect width"); nsReflowStatus status; nsHTMLReflowMetrics desiredSize; target->Reflow(mPresContext, desiredSize, reflowState, status); // If an incremental reflow is initiated at a frame other than the // root frame, then its desired size had better not change! If it's // initiated at the root, then the size better not change unless its // height was unconstrained to start with. NS_ASSERTION((target == rootFrame && size.height == NS_UNCONSTRAINEDSIZE) || (desiredSize.width == size.width && desiredSize.height == size.height), "non-root frame's desired size changed during an " "incremental reflow"); NS_ASSERTION(desiredSize.mOverflowArea == nsRect(nsPoint(0, 0), nsSize(desiredSize.width, desiredSize.height)), "reflow roots must not have visible overflow"); NS_ASSERTION(status == NS_FRAME_COMPLETE, "reflow roots should never split"); target->SetSize(nsSize(desiredSize.width, desiredSize.height)); nsContainerFrame::SyncFrameViewAfterReflow(mPresContext, target, target->GetView(), &desiredSize.mOverflowArea); target->DidReflow(mPresContext, nsnull, NS_FRAME_REFLOW_FINISHED); if (target == rootFrame && size.height == NS_UNCONSTRAINEDSIZE) { mPresContext->SetVisibleArea(nsRect(0, 0, desiredSize.width, desiredSize.height)); } } #ifdef DEBUG void PresShell::DoVerifyReflow() { if (nsIFrameDebug::GetVerifyTreeEnable()) { nsIFrameDebug* frameDebug; nsIFrame* rootFrame = FrameManager()->GetRootFrame(); if (NS_SUCCEEDED(rootFrame->QueryInterface(NS_GET_IID(nsIFrameDebug), (void**)&frameDebug))) { frameDebug->VerifyTree(); } } if (GetVerifyReflowEnable()) { // First synchronously render what we have so far so that we can // see it. nsIView* rootView; mViewManager->GetRootView(rootView); mViewManager->UpdateView(rootView, NS_VMREFRESH_IMMEDIATE); FlushPendingNotifications(Flush_Layout); mInVerifyReflow = PR_TRUE; PRBool ok = VerifyIncrementalReflow(); mInVerifyReflow = PR_FALSE; if (VERIFY_REFLOW_ALL & gVerifyReflowFlags) { printf("ProcessReflowCommands: finished (%s)\n", ok ? "ok" : "failed"); } if (0 != mDirtyRoots.Count()) { printf("XXX yikes! reflow commands queued during verify-reflow\n"); } } } #endif nsresult PresShell::ProcessReflowCommands(PRBool aInterruptible) { MOZ_TIMER_DEBUGLOG(("Start: Reflow: PresShell::ProcessReflowCommands(), this=%p\n", this)); MOZ_TIMER_START(mReflowWatch); if (0 != mDirtyRoots.Count()) { #ifdef DEBUG if (VERIFY_REFLOW_DUMP_COMMANDS & gVerifyReflowFlags) { printf("ProcessReflowCommands: begin incremental reflow\n"); } #endif WillDoReflow(); // If reflow is interruptible, then make a note of our deadline. const PRIntervalTime deadline = aInterruptible ? PR_IntervalNow() + PR_MicrosecondsToInterval(gMaxRCProcessingTime) : (PRIntervalTime)0; // Scope for the reflow entry point { AUTO_LAYOUT_PHASE_ENTRY_POINT(GetPresContext(), Reflow); mIsReflowing = PR_TRUE; do { // Send an incremental reflow notification to the target frame. PRInt32 idx = mDirtyRoots.Count() - 1; nsIFrame *target = static_cast(mDirtyRoots[idx]); mDirtyRoots.RemoveElementAt(idx); if (!NS_SUBTREE_DIRTY(target)) { // It's not dirty anymore, which probably means the notification // was posted in the middle of a reflow (perhaps with a reflow // root in the middle). Don't do anything. continue; } DoReflow(target); // Keep going until we're out of reflow commands, or we've run // past our deadline. } while (mDirtyRoots.Count() && (!aInterruptible || PR_IntervalNow() < deadline)); // XXXwaterson for interruptible reflow, examine the tree and // re-enqueue any unflowed reflow targets. mIsReflowing = PR_FALSE; } DidDoReflow(); // DidDoReflow might have killed us if (!mIsDestroying) { #ifdef DEBUG if (VERIFY_REFLOW_DUMP_COMMANDS & gVerifyReflowFlags) { printf("\nPresShell::ProcessReflowCommands() finished: this=%p\n", (void*)this); } DoVerifyReflow(); #endif // If any new reflow commands were enqueued during the reflow, schedule // another reflow event to process them. Note that we want to do this // after DidDoReflow(), since that method can change whether there are // dirty roots around by flushing, and there's no point in posting a // reflow event just to have the flush revoke it. if (mDirtyRoots.Count()) PostReflowEvent(); } } MOZ_TIMER_DEBUGLOG(("Stop: Reflow: PresShell::ProcessReflowCommands(), this=%p\n", this)); MOZ_TIMER_STOP(mReflowWatch); if (!mIsDestroying && mShouldUnsuppressPainting && mDirtyRoots.Count() == 0) { // We only unlock if we're out of reflows. It's pointless // to unlock if reflows are still pending, since reflows // are just going to thrash the frames around some more. By // waiting we avoid an overeager "jitter" effect. mShouldUnsuppressPainting = PR_FALSE; UnsuppressAndInvalidate(); } return NS_OK; } void PresShell::ClearReflowEventStatus() { mReflowEvent.Forget(); } #ifdef MOZ_XUL /* * It's better to add stuff to the |DidSetStyleContext| method of the * relevant frames than adding it here. These methods should (ideally, * anyway) go away. */ // Return value says whether to walk children. typedef PRBool (* PR_CALLBACK frameWalkerFn)(nsIFrame *aFrame, void *aClosure); PR_STATIC_CALLBACK(PRBool) ReResolveMenusAndTrees(nsIFrame *aFrame, void *aClosure) { // Trees have a special style cache that needs to be flushed when // the theme changes. nsCOMPtr treeBox(do_QueryInterface(aFrame)); if (treeBox) treeBox->ClearStyleAndImageCaches(); // We deliberately don't re-resolve style on a menu's popup // sub-content, since doing so slows menus to a crawl. That means we // have to special-case them on a skin switch, and ensure that the // popup frames just get destroyed completely. if (aFrame && aFrame->GetType() == nsGkAtoms::menuFrame) (static_cast(aFrame))->CloseMenu(PR_TRUE); return PR_TRUE; } PR_STATIC_CALLBACK(PRBool) ReframeImageBoxes(nsIFrame *aFrame, void *aClosure) { nsStyleChangeList *list = static_cast(aClosure); if (aFrame->GetType() == nsGkAtoms::imageBoxFrame) { list->AppendChange(aFrame, aFrame->GetContent(), NS_STYLE_HINT_FRAMECHANGE); return PR_FALSE; // don't walk descendants } return PR_TRUE; // walk descendants } static void WalkFramesThroughPlaceholders(nsPresContext *aPresContext, nsIFrame *aFrame, frameWalkerFn aFunc, void *aClosure) { PRBool walkChildren = (*aFunc)(aFrame, aClosure); if (!walkChildren) return; PRInt32 listIndex = 0; nsIAtom* childList = nsnull; do { nsIFrame *child = aFrame->GetFirstChild(childList); while (child) { if (!(child->GetStateBits() & NS_FRAME_OUT_OF_FLOW)) { // only do frames that are in flow, and recur through the // out-of-flows of placeholders. WalkFramesThroughPlaceholders(aPresContext, nsPlaceholderFrame::GetRealFrameFor(child), aFunc, aClosure); } child = child->GetNextSibling(); } childList = aFrame->GetAdditionalChildListName(listIndex++); } while (childList); } #endif NS_IMETHODIMP PresShell::Observe(nsISupports* aSubject, const char* aTopic, const PRUnichar* aData) { #ifdef MOZ_XUL if (!nsCRT::strcmp(aTopic, "chrome-flush-skin-caches")) { nsIFrame *rootFrame = FrameManager()->GetRootFrame(); // Need to null-check because "chrome-flush-skin-caches" can happen // at interesting times during startup. if (rootFrame) { NS_ASSERTION(mViewManager, "View manager must exist"); nsIViewManager::UpdateViewBatch batch(mViewManager); WalkFramesThroughPlaceholders(mPresContext, rootFrame, &ReResolveMenusAndTrees, nsnull); // Because "chrome:" URL equality is messy, reframe image box // frames (hack!). nsStyleChangeList changeList; WalkFramesThroughPlaceholders(mPresContext, rootFrame, ReframeImageBoxes, &changeList); // Mark ourselves as not safe to flush while we're doing frame // construction. ++mChangeNestCount; mFrameConstructor->ProcessRestyledFrames(changeList); --mChangeNestCount; batch.EndUpdateViewBatch(NS_VMREFRESH_NO_SYNC); #ifdef ACCESSIBILITY InvalidateAccessibleSubtree(nsnull); #endif } return NS_OK; } #endif if (!nsCRT::strcmp(aTopic, NS_LINK_VISITED_EVENT_TOPIC)) { nsCOMPtr uri = do_QueryInterface(aSubject); if (uri && mDocument) { mDocument->NotifyURIVisitednessChanged(uri); } return NS_OK; } if (!nsCRT::strcmp(aTopic, "agent-sheet-added") && mStyleSet) { AddAgentSheet(aSubject); return NS_OK; } if (!nsCRT::strcmp(aTopic, "user-sheet-added") && mStyleSet) { AddUserSheet(aSubject); return NS_OK; } if (!nsCRT::strcmp(aTopic, "agent-sheet-removed") && mStyleSet) { RemoveSheet(nsStyleSet::eAgentSheet, aSubject); return NS_OK; } if (!nsCRT::strcmp(aTopic, "user-sheet-removed") && mStyleSet) { RemoveSheet(nsStyleSet::eUserSheet, aSubject); return NS_OK; } #ifdef ACCESSIBILITY if (!nsCRT::strcmp(aTopic, "a11y-init-or-shutdown")) { gIsAccessibilityActive = aData && *aData == '1'; } #endif NS_WARNING("unrecognized topic in PresShell::Observe"); return NS_ERROR_FAILURE; } void PresShell::EnumeratePlugins(nsIDOMDocument *aDocument, const nsString &aPluginTag, nsPluginEnumCallback aCallback) { nsCOMPtr nodes; aDocument->GetElementsByTagName(aPluginTag, getter_AddRefs(nodes)); if (!nodes) return; PRUint32 length; nodes->GetLength(&length); for (PRUint32 i = 0; i < length; ++i) { nsCOMPtr node; nodes->Item(i, getter_AddRefs(node)); nsCOMPtr content = do_QueryInterface(node); if (content) aCallback(this, content); } } //------------------------------------------------------ // End of protected and private methods on the PresShell //------------------------------------------------------ // Start of DEBUG only code #ifdef NS_DEBUG #include "nsViewsCID.h" #include "nsWidgetsCID.h" #include "nsIDeviceContext.h" #include "nsIURL.h" #include "nsILinkHandler.h" static NS_DEFINE_CID(kViewManagerCID, NS_VIEW_MANAGER_CID); static NS_DEFINE_CID(kWidgetCID, NS_CHILD_CID); static void LogVerifyMessage(nsIFrame* k1, nsIFrame* k2, const char* aMsg) { printf("verifyreflow: "); nsAutoString name; if (nsnull != k1) { nsIFrameDebug* frameDebug; if (NS_SUCCEEDED(k1->QueryInterface(NS_GET_IID(nsIFrameDebug), (void**)&frameDebug))) { frameDebug->GetFrameName(name); } } else { name.Assign(NS_LITERAL_STRING("(null)")); } fputs(NS_LossyConvertUTF16toASCII(name).get(), stdout); fprintf(stdout, " %p ", (void*)k1); printf(" != "); if (nsnull != k2) { nsIFrameDebug* frameDebug; if (NS_SUCCEEDED(k2->QueryInterface(NS_GET_IID(nsIFrameDebug), (void**)&frameDebug))) { frameDebug->GetFrameName(name); } } else { name.Assign(NS_LITERAL_STRING("(null)")); } fputs(NS_LossyConvertUTF16toASCII(name).get(), stdout); fprintf(stdout, " %p ", (void*)k2); printf(" %s", aMsg); } static void LogVerifyMessage(nsIFrame* k1, nsIFrame* k2, const char* aMsg, const nsRect& r1, const nsRect& r2) { printf("VerifyReflow Error:\n"); nsAutoString name; nsIFrameDebug* frameDebug; if (NS_SUCCEEDED(k1->QueryInterface(NS_GET_IID(nsIFrameDebug), (void**)&frameDebug))) { fprintf(stdout, " "); frameDebug->GetFrameName(name); fputs(NS_LossyConvertUTF16toASCII(name).get(), stdout); fprintf(stdout, " %p ", (void*)k1); } printf("{%d, %d, %d, %d}", r1.x, r1.y, r1.width, r1.height); printf(" != \n"); if (NS_SUCCEEDED(k2->QueryInterface(NS_GET_IID(nsIFrameDebug), (void**)&frameDebug))) { fprintf(stdout, " "); frameDebug->GetFrameName(name); fputs(NS_LossyConvertUTF16toASCII(name).get(), stdout); fprintf(stdout, " %p ", (void*)k2); } printf("{%d, %d, %d, %d}\n", r2.x, r2.y, r2.width, r2.height); printf(" %s\n", aMsg); } static PRBool CompareTrees(nsPresContext* aFirstPresContext, nsIFrame* aFirstFrame, nsPresContext* aSecondPresContext, nsIFrame* aSecondFrame) { if (!aFirstPresContext || !aFirstFrame || !aSecondPresContext || !aSecondFrame) return PR_TRUE; // XXX Evil hack to reduce false positives; I can't seem to figure // out how to flush scrollbar changes correctly //if (aFirstFrame->GetType() == nsGkAtoms::scrollbarFrame) // return PR_TRUE; PRBool ok = PR_TRUE; nsIAtom* listName = nsnull; PRInt32 listIndex = 0; do { nsIFrame* k1 = aFirstFrame->GetFirstChild(listName); nsIFrame* k2 = aSecondFrame->GetFirstChild(listName); PRInt32 l1 = nsContainerFrame::LengthOf(k1); PRInt32 l2 = nsContainerFrame::LengthOf(k2); if (l1 != l2) { ok = PR_FALSE; LogVerifyMessage(k1, k2, "child counts don't match: "); printf("%d != %d\n", l1, l2); if (0 == (VERIFY_REFLOW_ALL & gVerifyReflowFlags)) { break; } } nsRect r1, r2; nsIView* v1, *v2; for (;;) { if (((nsnull == k1) && (nsnull != k2)) || ((nsnull != k1) && (nsnull == k2))) { ok = PR_FALSE; LogVerifyMessage(k1, k2, "child lists are different\n"); break; } else if (nsnull != k1) { // Verify that the frames are the same size if (k1->GetRect() != k2->GetRect()) { ok = PR_FALSE; LogVerifyMessage(k1, k2, "(frame rects)", k1->GetRect(), k2->GetRect()); } // Make sure either both have views or neither have views; if they // do have views, make sure the views are the same size. If the // views have widgets, make sure they both do or neither does. If // they do, make sure the widgets are the same size. v1 = k1->GetView(); v2 = k2->GetView(); if (((nsnull == v1) && (nsnull != v2)) || ((nsnull != v1) && (nsnull == v2))) { ok = PR_FALSE; LogVerifyMessage(k1, k2, "child views are not matched\n"); } else if (nsnull != v1) { if (v1->GetBounds() != v2->GetBounds()) { LogVerifyMessage(k1, k2, "(view rects)", v1->GetBounds(), v2->GetBounds()); } nsIWidget* w1 = v1->GetWidget(); nsIWidget* w2 = v2->GetWidget(); if (((nsnull == w1) && (nsnull != w2)) || ((nsnull != w1) && (nsnull == w2))) { ok = PR_FALSE; LogVerifyMessage(k1, k2, "child widgets are not matched\n"); } else if (nsnull != w1) { w1->GetBounds(r1); w2->GetBounds(r2); if (r1 != r2) { LogVerifyMessage(k1, k2, "(widget rects)", r1, r2); } } } if (!ok && (0 == (VERIFY_REFLOW_ALL & gVerifyReflowFlags))) { break; } // verify that neither frame has a space manager, // or they both do and the space managers are equivalent nsSpaceManager *sm1 = static_cast (k1->GetProperty(nsGkAtoms::spaceManagerProperty)); // look at the test frame nsSpaceManager *sm2 = static_cast (k2->GetProperty(nsGkAtoms::spaceManagerProperty)); // now compare the space managers if (((nsnull == sm1) && (nsnull != sm2)) || ((nsnull != sm1) && (nsnull == sm2))) { // one is null, and the other is not ok = PR_FALSE; LogVerifyMessage(k1, k2, "space managers are not matched\n"); } else if (sm1 && sm2) { // both are not null, compare them // first, compare yMost nscoord yMost1, yMost2; nsresult smresult = sm1->YMost(yMost1); if (NS_ERROR_ABORT != smresult) { NS_ASSERTION(NS_SUCCEEDED(smresult), "bad result"); smresult = sm2->YMost(yMost2); NS_ASSERTION(NS_SUCCEEDED(smresult), "bad result"); if (yMost1 != yMost2) { LogVerifyMessage(k1, k2, "yMost of space managers differs\n"); } // now compare bands by sampling PRInt32 yIncrement = yMost1/100; if (0==yIncrement) { yIncrement = 1; // guarantee we make progress in the loop below } nscoord yOffset = 0; for ( ; ok && yOffset < yMost1; yOffset += yIncrement) { nscoord small=5, large=100; nsBandData band1, band2; nsBandTrapezoid trap1[20], trap2[20]; band1.mSize = band2.mSize = 20; band1.mTrapezoids = trap1; band2.mTrapezoids = trap2; sm1->GetBandData(yOffset, nsSize(small,small), band1); sm2->GetBandData(yOffset, nsSize(small,small), band2); if (band1.mCount != band2.mCount) { // count mismatch, stop comparing LogVerifyMessage(k1, k2, "band.mCount of space managers differs\n"); printf("count1= %d, count2=%d, yOffset = %d, size=%d\n", band1.mCount, band2.mCount, yOffset, small); ok = PR_FALSE; } else // band counts match, compare individual traps { PRInt32 trapIndex=0; for ( ;trapIndexGetBandData(yOffset, nsSize(large,large), band1); sm2->GetBandData(yOffset, nsSize(large,large), band2); if (band1.mCount != band2.mCount) { // count mismatch, stop comparing LogVerifyMessage(k1, k2, "band.mCount of space managers differs\n"); printf("count1= %d, count2=%d, yOffset = %d, size=%d\n", band1.mCount, band2.mCount, yOffset, small); ok = PR_FALSE; } else // band counts match, compare individual traps { PRInt32 trapIndex=0; for ( ; trapIndexGetNextSibling(); k2 = k2->GetNextSibling(); } else { break; } } if (!ok && (0 == (VERIFY_REFLOW_ALL & gVerifyReflowFlags))) { break; } nsIAtom* listName1 = aFirstFrame->GetAdditionalChildListName(listIndex); nsIAtom* listName2 = aSecondFrame->GetAdditionalChildListName(listIndex); listIndex++; if (listName1 != listName2) { if (0 == (VERIFY_REFLOW_ALL & gVerifyReflowFlags)) { ok = PR_FALSE; } LogVerifyMessage(k1, k2, "child list names are not matched: "); nsAutoString tmp; if (nsnull != listName1) { listName1->ToString(tmp); fputs(NS_LossyConvertUTF16toASCII(tmp).get(), stdout); } else fputs("(null)", stdout); printf(" != "); if (nsnull != listName2) { listName2->ToString(tmp); fputs(NS_LossyConvertUTF16toASCII(tmp).get(), stdout); } else fputs("(null)", stdout); printf("\n"); break; } listName = listName1; } while (ok && (listName != nsnull)); return ok; } #endif #if 0 static nsIFrame* FindTopFrame(nsIFrame* aRoot) { if (aRoot) { nsIContent* content = aRoot->GetContent(); if (content) { nsIAtom* tag; content->GetTag(tag); if (nsnull != tag) { NS_RELEASE(tag); return aRoot; } } // Try one of the children nsIFrame* kid = aRoot->GetFirstChild(nsnull); while (nsnull != kid) { nsIFrame* result = FindTopFrame(kid); if (nsnull != result) { return result; } kid = kid->GetNextSibling(); } } return nsnull; } #endif #ifdef DEBUG nsresult PresShell::CloneStyleSet(nsStyleSet* aSet, nsStyleSet** aResult) { nsStyleSet *clone = new nsStyleSet(); if (!clone) { return NS_ERROR_OUT_OF_MEMORY; } PRInt32 i, n = aSet->SheetCount(nsStyleSet::eOverrideSheet); for (i = 0; i < n; i++) { nsIStyleSheet* ss = aSet->StyleSheetAt(nsStyleSet::eOverrideSheet, i); if (ss) clone->AppendStyleSheet(nsStyleSet::eOverrideSheet, ss); } // The document expects to insert document stylesheets itself #if 0 n = aSet->SheetCount(nsStyleSet::eDocSheet); for (i = 0; i < n; i++) { nsIStyleSheet* ss = aSet->StyleSheetAt(nsStyleSet::eDocSheet, i); if (ss) clone->AddDocStyleSheet(ss, mDocument); } #endif n = aSet->SheetCount(nsStyleSet::eUserSheet); for (i = 0; i < n; i++) { nsIStyleSheet* ss = aSet->StyleSheetAt(nsStyleSet::eUserSheet, i); if (ss) clone->AppendStyleSheet(nsStyleSet::eUserSheet, ss); } n = aSet->SheetCount(nsStyleSet::eAgentSheet); for (i = 0; i < n; i++) { nsIStyleSheet* ss = aSet->StyleSheetAt(nsStyleSet::eAgentSheet, i); if (ss) clone->AppendStyleSheet(nsStyleSet::eAgentSheet, ss); } *aResult = clone; return NS_OK; } #ifdef DEBUG_Eli static nsresult DumpToPNG(nsIPresShell* shell, nsAString& name) { PRInt32 width=1000, height=1000; nsRect r(0, 0, shell->GetPresContext()->DevPixelsToAppUnits(width), shell->GetPresContext()->DevPixelsToAppUnits(height)); nsRefPtr imgSurface = new gfxImageSurface(gfxIntSize(width, height), gfxImageSurface::ImageFormatARGB32); NS_ENSURE_TRUE(imgSurface, NS_ERROR_OUT_OF_MEMORY); nsRefPtr imgContext = new gfxContext(imgSurface); nsRefPtr surface = gfxPlatform::GetPlatform()-> CreateOffscreenSurface(gfxIntSize(width, height), gfxASurface::ImageFormatARGB32); NS_ENSURE_TRUE(surface, NS_ERROR_OUT_OF_MEMORY); nsRefPtr context = new gfxContext(surface); NS_ENSURE_TRUE(context, NS_ERROR_OUT_OF_MEMORY); nsresult rv = shell->RenderDocument(r, PR_FALSE, PR_FALSE, NS_RGB(255, 255, 0), context); NS_ENSURE_SUCCESS(rv, rv); imgContext->DrawSurface(surface, gfxSize(width, height)); nsCOMPtr encoder = do_CreateInstance("@mozilla.org/image/encoder;2?type=image/png"); NS_ENSURE_TRUE(encoder, NS_ERROR_FAILURE); encoder->InitFromData(imgSurface->Data(), imgSurface->Stride() * height, width, height, imgSurface->Stride(), imgIEncoder::INPUT_FORMAT_HOSTARGB, EmptyString()); // XXX not sure if this is the right way to write to a file nsCOMPtr file = do_CreateInstance("@mozilla.org/file/local;1"); NS_ENSURE_TRUE(file, NS_ERROR_FAILURE); rv = file->InitWithPath(name); NS_ENSURE_SUCCESS(rv, rv); PRUint32 length; encoder->Available(&length); nsCOMPtr outputStream; rv = NS_NewLocalFileOutputStream(getter_AddRefs(outputStream), file); NS_ENSURE_SUCCESS(rv, rv); nsCOMPtr bufferedOutputStream; rv = NS_NewBufferedOutputStream(getter_AddRefs(bufferedOutputStream), outputStream, length); PRUint32 numWritten; rv = bufferedOutputStream->WriteFrom(encoder, length, &numWritten); NS_ENSURE_SUCCESS(rv, rv); return NS_OK; } #endif // After an incremental reflow, we verify the correctness by doing a // full reflow into a fresh frame tree. PRBool PresShell::VerifyIncrementalReflow() { if (VERIFY_REFLOW_NOISY & gVerifyReflowFlags) { printf("Building Verification Tree...\n"); } // Create a presentation context to view the new frame tree nsCOMPtr cx = new nsPresContext(mDocument, mPresContext->IsPaginated() ? nsPresContext::eContext_PrintPreview : nsPresContext::eContext_Galley); NS_ENSURE_TRUE(cx, PR_FALSE); nsIDeviceContext *dc = mPresContext->DeviceContext(); nsresult rv = cx->Init(dc); NS_ENSURE_SUCCESS(rv, PR_FALSE); // Get our scrolling preference nsIView* rootView; mViewManager->GetRootView(rootView); void* nativeParentWidget = rootView->GetWidget()->GetNativeData(NS_NATIVE_WIDGET); // Create a new view manager. nsCOMPtr vm = do_CreateInstance(kViewManagerCID); NS_ENSURE_TRUE(vm, PR_FALSE); rv = vm->Init(dc); NS_ENSURE_SUCCESS(rv, PR_FALSE); // Create a child window of the parent that is our "root view/window" // Create a view nsRect tbounds = mPresContext->GetVisibleArea(); nsIView* view = vm->CreateView(tbounds, nsnull); NS_ENSURE_TRUE(view, PR_FALSE); //now create the widget for the view rv = view->CreateWidget(kWidgetCID, nsnull, nativeParentWidget, PR_TRUE); NS_ENSURE_SUCCESS(rv, PR_FALSE); // Setup hierarchical relationship in view manager vm->SetRootView(view); // Make the new presentation context the same size as our // presentation context. nsRect r = mPresContext->GetVisibleArea(); cx->SetVisibleArea(r); // Create a new presentation shell to view the document. Use the // exact same style information that this document has. nsAutoPtr newSet; rv = CloneStyleSet(mStyleSet, getter_Transfers(newSet)); NS_ENSURE_SUCCESS(rv, PR_FALSE); nsCOMPtr sh; rv = mDocument->CreateShell(cx, vm, newSet, getter_AddRefs(sh)); NS_ENSURE_SUCCESS(rv, PR_FALSE); newSet.forget(); // Note that after we create the shell, we must make sure to destroy it sh->SetVerifyReflowEnable(PR_FALSE); // turn off verify reflow while we're reflowing the test frame tree vm->SetViewObserver((nsIViewObserver *)((PresShell*)sh.get())); WillCauseReflow(); sh->InitialReflow(r.width, r.height); DidCauseReflow(); mDocument->BindingManager()->ProcessAttachedQueue(); sh->FlushPendingNotifications(Flush_Layout); sh->SetVerifyReflowEnable(PR_TRUE); // turn on verify reflow again now that we're done reflowing the test frame tree // Force the non-primary presshell to unsuppress; it doesn't want to normally // because it thinks it's hidden ((PresShell*)sh.get())->mPaintingSuppressed = PR_FALSE; if (VERIFY_REFLOW_NOISY & gVerifyReflowFlags) { printf("Verification Tree built, comparing...\n"); } // Now that the document has been reflowed, use its frame tree to // compare against our frame tree. nsIFrame* root1 = FrameManager()->GetRootFrame(); nsIFrame* root2 = sh->FrameManager()->GetRootFrame(); PRBool ok = CompareTrees(mPresContext, root1, cx, root2); if (!ok && (VERIFY_REFLOW_NOISY & gVerifyReflowFlags)) { printf("Verify reflow failed, primary tree:\n"); nsIFrameDebug* frameDebug; if (NS_SUCCEEDED(CallQueryInterface(root1, &frameDebug))) { frameDebug->List(stdout, 0); } printf("Verification tree:\n"); if (NS_SUCCEEDED(CallQueryInterface(root2, &frameDebug))) { frameDebug->List(stdout, 0); } } #ifdef DEBUG_Eli // Sample code for dumping page to png // XXX Needs to be made more flexible if (!ok) { nsString stra; static int num = 0; stra.AppendLiteral("C:\\mozilla\\mozilla\\debug\\filea"); stra.AppendInt(num); stra.AppendLiteral(".png"); DumpToPNG(sh, stra); nsString strb; strb.AppendLiteral("C:\\mozilla\\mozilla\\debug\\fileb"); strb.AppendInt(num); strb.AppendLiteral(".png"); DumpToPNG(this, strb); ++num; } #endif sh->EndObservingDocument(); sh->Destroy(); if (VERIFY_REFLOW_NOISY & gVerifyReflowFlags) { printf("Finished Verifying Reflow...\n"); } return ok; } // Layout debugging hooks void PresShell::ListStyleContexts(nsIFrame *aRootFrame, FILE *out, PRInt32 aIndent) { nsStyleContext *sc = aRootFrame->GetStyleContext(); if (sc) sc->List(out, aIndent); } void PresShell::ListStyleSheets(FILE *out, PRInt32 aIndent) { PRInt32 sheetCount = mStyleSet->SheetCount(nsStyleSet::eDocSheet); for (PRInt32 i = 0; i < sheetCount; ++i) { mStyleSet->StyleSheetAt(nsStyleSet::eDocSheet, i)->List(out, aIndent); fputs("\n", out); } } void PresShell::VerifyStyleTree() { VERIFY_STYLE_TREE; } #endif //============================================================= //============================================================= //-- Debug Reflow Counts //============================================================= //============================================================= #ifdef MOZ_REFLOW_PERF //------------------------------------------------------------- NS_IMETHODIMP PresShell::DumpReflows() { if (mReflowCountMgr) { nsCAutoString uriStr; if (mDocument) { nsIURI *uri = mDocument->GetDocumentURI(); if (uri) { uri->GetPath(uriStr); } } mReflowCountMgr->DisplayTotals(uriStr.get()); mReflowCountMgr->DisplayHTMLTotals(uriStr.get()); mReflowCountMgr->DisplayDiffsInTotals("Differences"); } return NS_OK; } //------------------------------------------------------------- NS_IMETHODIMP PresShell::CountReflows(const char * aName, nsIFrame * aFrame) { if (mReflowCountMgr) { mReflowCountMgr->Add(aName, aFrame); } return NS_OK; } //------------------------------------------------------------- NS_IMETHODIMP PresShell::PaintCount(const char * aName, nsIRenderingContext* aRenderingContext, nsPresContext* aPresContext, nsIFrame * aFrame, PRUint32 aColor) { if (mReflowCountMgr) { mReflowCountMgr->PaintCount(aName, aRenderingContext, aPresContext, aFrame, aColor); } return NS_OK; } //------------------------------------------------------------- NS_IMETHODIMP PresShell::SetPaintFrameCount(PRBool aPaintFrameCounts) { if (mReflowCountMgr) { mReflowCountMgr->SetPaintFrameCounts(aPaintFrameCounts); } return NS_OK; } //------------------------------------------------------------------ //-- Reflow Counter Classes Impls //------------------------------------------------------------------ //------------------------------------------------------------------ ReflowCounter::ReflowCounter(ReflowCountMgr * aMgr) : mMgr(aMgr) { ClearTotals(); SetTotalsCache(); } //------------------------------------------------------------------ ReflowCounter::~ReflowCounter() { } //------------------------------------------------------------------ void ReflowCounter::ClearTotals() { mTotal = 0; } //------------------------------------------------------------------ void ReflowCounter::SetTotalsCache() { mCacheTotal = mTotal; } //------------------------------------------------------------------ void ReflowCounter::CalcDiffInTotals() { mCacheTotal = mTotal - mCacheTotal; } //------------------------------------------------------------------ void ReflowCounter::DisplayTotals(const char * aStr) { DisplayTotals(mTotal, aStr?aStr:"Totals"); } //------------------------------------------------------------------ void ReflowCounter::DisplayDiffTotals(const char * aStr) { DisplayTotals(mCacheTotal, aStr?aStr:"Diff Totals"); } //------------------------------------------------------------------ void ReflowCounter::DisplayHTMLTotals(const char * aStr) { DisplayHTMLTotals(mTotal, aStr?aStr:"Totals"); } //------------------------------------------------------------------ void ReflowCounter::DisplayTotals(PRUint32 aTotal, const char * aTitle) { // figure total if (aTotal == 0) { return; } ReflowCounter * gTots = (ReflowCounter *)mMgr->LookUp(kGrandTotalsStr); printf("%25s\t", aTitle); printf("%d\t", aTotal); if (gTots != this && aTotal > 0) { gTots->Add(aTotal); } } //------------------------------------------------------------------ void ReflowCounter::DisplayHTMLTotals(PRUint32 aTotal, const char * aTitle) { if (aTotal == 0) { return; } ReflowCounter * gTots = (ReflowCounter *)mMgr->LookUp(kGrandTotalsStr); FILE * fd = mMgr->GetOutFile(); if (!fd) { return; } fprintf(fd, "
%s
", aTitle); fprintf(fd, "
%d
\n", aTotal); if (gTots != this && aTotal > 0) { gTots->Add(aTotal); } } //------------------------------------------------------------------ //-- ReflowCountMgr //------------------------------------------------------------------ ReflowCountMgr::ReflowCountMgr() { mCounts = PL_NewHashTable(10, PL_HashString, PL_CompareStrings, PL_CompareValues, nsnull, nsnull); mIndiFrameCounts = PL_NewHashTable(10, PL_HashString, PL_CompareStrings, PL_CompareValues, nsnull, nsnull); mCycledOnce = PR_FALSE; mDumpFrameCounts = PR_FALSE; mDumpFrameByFrameCounts = PR_FALSE; mPaintFrameByFrameCounts = PR_FALSE; } //------------------------------------------------------------------ ReflowCountMgr::~ReflowCountMgr() { CleanUp(); } //------------------------------------------------------------------ ReflowCounter * ReflowCountMgr::LookUp(const char * aName) { if (nsnull != mCounts) { ReflowCounter * counter = (ReflowCounter *)PL_HashTableLookup(mCounts, aName); return counter; } return nsnull; } //------------------------------------------------------------------ void ReflowCountMgr::Add(const char * aName, nsIFrame * aFrame) { NS_ASSERTION(aName != nsnull, "Name shouldn't be null!"); if (mDumpFrameCounts && nsnull != mCounts) { ReflowCounter * counter = (ReflowCounter *)PL_HashTableLookup(mCounts, aName); if (counter == nsnull) { counter = new ReflowCounter(this); NS_ASSERTION(counter != nsnull, "null ptr"); char * name = NS_strdup(aName); NS_ASSERTION(name != nsnull, "null ptr"); PL_HashTableAdd(mCounts, name, counter); } counter->Add(); } if ((mDumpFrameByFrameCounts || mPaintFrameByFrameCounts) && nsnull != mIndiFrameCounts && aFrame != nsnull) { char * key = new char[16]; sprintf(key, "%p", (void*)aFrame); IndiReflowCounter * counter = (IndiReflowCounter *)PL_HashTableLookup(mIndiFrameCounts, key); if (counter == nsnull) { counter = new IndiReflowCounter(this); NS_ASSERTION(counter != nsnull, "null ptr"); counter->mFrame = aFrame; counter->mName.AssignASCII(aName); PL_HashTableAdd(mIndiFrameCounts, key, counter); } // this eliminates extra counts from super classes if (counter != nsnull && counter->mName.EqualsASCII(aName)) { counter->mCount++; counter->mCounter.Add(1); } } } //------------------------------------------------------------------ void ReflowCountMgr::PaintCount(const char * aName, nsIRenderingContext* aRenderingContext, nsPresContext* aPresContext, nsIFrame* aFrame, PRUint32 aColor) { if (mPaintFrameByFrameCounts && nsnull != mIndiFrameCounts && aFrame != nsnull) { char * key = new char[16]; sprintf(key, "%p", (void*)aFrame); IndiReflowCounter * counter = (IndiReflowCounter *)PL_HashTableLookup(mIndiFrameCounts, key); if (counter != nsnull && counter->mName.EqualsASCII(aName)) { aRenderingContext->PushState(); nsFont font("Times", NS_FONT_STYLE_NORMAL, NS_FONT_VARIANT_NORMAL, NS_FONT_WEIGHT_NORMAL, 0, nsPresContext::CSSPixelsToAppUnits(11)); nsCOMPtr fm = aPresContext->GetMetricsFor(font); aRenderingContext->SetFont(fm); char buf[16]; sprintf(buf, "%d", counter->mCount); nscoord x = 0, y; nscoord width, height; aRenderingContext->SetTextRunRTL(PR_FALSE); aRenderingContext->GetWidth((char*)buf, width); fm->GetHeight(height); fm->GetMaxAscent(y); PRUint32 color; PRUint32 color2; if (aColor != 0) { color = aColor; color2 = NS_RGB(0,0,0); } else { PRUint8 rc = 0, gc = 0, bc = 0; if (counter->mCount < 5) { rc = 255; gc = 255; } else if ( counter->mCount < 11) { gc = 255; } else { rc = 255; } color = NS_RGB(rc,gc,bc); color2 = NS_RGB(rc/2,gc/2,bc/2); } nsRect rect(0,0, width+15, height+15); aRenderingContext->SetColor(NS_RGB(0,0,0)); aRenderingContext->FillRect(rect); aRenderingContext->SetColor(color2); aRenderingContext->DrawString(buf, strlen(buf), x+15,y+15); aRenderingContext->SetColor(color); aRenderingContext->DrawString(buf, strlen(buf), x,y); aRenderingContext->PopState(); } } } //------------------------------------------------------------------ PRIntn ReflowCountMgr::RemoveItems(PLHashEntry *he, PRIntn i, void *arg) { char *str = (char *)he->key; ReflowCounter * counter = (ReflowCounter *)he->value; delete counter; NS_Free(str); return HT_ENUMERATE_REMOVE; } //------------------------------------------------------------------ PRIntn ReflowCountMgr::RemoveIndiItems(PLHashEntry *he, PRIntn i, void *arg) { char *str = (char *)he->key; IndiReflowCounter * counter = (IndiReflowCounter *)he->value; delete counter; NS_Free(str); return HT_ENUMERATE_REMOVE; } //------------------------------------------------------------------ void ReflowCountMgr::CleanUp() { if (nsnull != mCounts) { PL_HashTableEnumerateEntries(mCounts, RemoveItems, nsnull); PL_HashTableDestroy(mCounts); mCounts = nsnull; } if (nsnull != mIndiFrameCounts) { PL_HashTableEnumerateEntries(mIndiFrameCounts, RemoveIndiItems, nsnull); PL_HashTableDestroy(mIndiFrameCounts); mIndiFrameCounts = nsnull; } } //------------------------------------------------------------------ PRIntn ReflowCountMgr::DoSingleTotal(PLHashEntry *he, PRIntn i, void *arg) { char *str = (char *)he->key; ReflowCounter * counter = (ReflowCounter *)he->value; counter->DisplayTotals(str); return HT_ENUMERATE_NEXT; } //------------------------------------------------------------------ void ReflowCountMgr::DoGrandTotals() { if (nsnull != mCounts) { ReflowCounter * gTots = (ReflowCounter *)PL_HashTableLookup(mCounts, kGrandTotalsStr); if (gTots == nsnull) { gTots = new ReflowCounter(this); PL_HashTableAdd(mCounts, NS_strdup(kGrandTotalsStr), gTots); } else { gTots->ClearTotals(); } printf("\t\t\t\tTotal\n"); for (PRUint32 i=0;i<78;i++) { printf("-"); } printf("\n"); PL_HashTableEnumerateEntries(mCounts, DoSingleTotal, this); } } static void RecurseIndiTotals(nsPresContext* aPresContext, PLHashTable * aHT, nsIFrame * aParentFrame, PRInt32 aLevel) { if (aParentFrame == nsnull) { return; } char key[16]; sprintf(key, "%p", (void*)aParentFrame); IndiReflowCounter * counter = (IndiReflowCounter *)PL_HashTableLookup(aHT, key); if (counter) { counter->mHasBeenOutput = PR_TRUE; char * name = ToNewCString(counter->mName); for (PRInt32 i=0;imCount); printf("%d", counter->mCounter.GetTotal()); printf("]\n"); nsMemory::Free(name); } nsIFrame* child = aParentFrame->GetFirstChild(nsnull); while (child) { RecurseIndiTotals(aPresContext, aHT, child, aLevel+1); child = child->GetNextSibling(); } } //------------------------------------------------------------------ PRIntn ReflowCountMgr::DoSingleIndi(PLHashEntry *he, PRIntn i, void *arg) { IndiReflowCounter * counter = (IndiReflowCounter *)he->value; if (counter && !counter->mHasBeenOutput) { char * name = ToNewCString(counter->mName); printf("%s - %p [%d][", name, (void*)counter->mFrame, counter->mCount); printf("%d", counter->mCounter.GetTotal()); printf("]\n"); nsMemory::Free(name); } return HT_ENUMERATE_NEXT; } //------------------------------------------------------------------ void ReflowCountMgr::DoIndiTotalsTree() { if (nsnull != mCounts) { printf("\n------------------------------------------------\n"); printf("-- Individual Frame Counts\n"); printf("------------------------------------------------\n"); if (mPresShell) { nsIFrame * rootFrame = mPresShell->FrameManager()->GetRootFrame(); RecurseIndiTotals(mPresContext, mIndiFrameCounts, rootFrame, 0); printf("------------------------------------------------\n"); printf("-- Individual Counts of Frames not in Root Tree\n"); printf("------------------------------------------------\n"); PL_HashTableEnumerateEntries(mIndiFrameCounts, DoSingleIndi, this); } } } //------------------------------------------------------------------ PRIntn ReflowCountMgr::DoSingleHTMLTotal(PLHashEntry *he, PRIntn i, void *arg) { char *str = (char *)he->key; ReflowCounter * counter = (ReflowCounter *)he->value; counter->DisplayHTMLTotals(str); return HT_ENUMERATE_NEXT; } //------------------------------------------------------------------ void ReflowCountMgr::DoGrandHTMLTotals() { if (nsnull != mCounts) { ReflowCounter * gTots = (ReflowCounter *)PL_HashTableLookup(mCounts, kGrandTotalsStr); if (gTots == nsnull) { gTots = new ReflowCounter(this); PL_HashTableAdd(mCounts, NS_strdup(kGrandTotalsStr), gTots); } else { gTots->ClearTotals(); } static const char * title[] = {"Class", "Reflows"}; fprintf(mFD, ""); for (PRUint32 i=0; i < NS_ARRAY_LENGTH(title); i++) { fprintf(mFD, "
%s
", title[i]); } fprintf(mFD, "\n"); PL_HashTableEnumerateEntries(mCounts, DoSingleHTMLTotal, this); } } //------------------------------------ void ReflowCountMgr::DisplayTotals(const char * aStr) { #ifdef DEBUG_rods printf("%s\n", aStr?aStr:"No name"); #endif if (mDumpFrameCounts) { DoGrandTotals(); } if (mDumpFrameByFrameCounts) { DoIndiTotalsTree(); } } //------------------------------------ void ReflowCountMgr::DisplayHTMLTotals(const char * aStr) { #ifdef WIN32x // XXX NOT XP! char name[1024]; char * sptr = strrchr(aStr, '/'); if (sptr) { sptr++; strcpy(name, sptr); char * eptr = strrchr(name, '.'); if (eptr) { *eptr = 0; } strcat(name, "_stats.html"); } mFD = fopen(name, "w"); if (mFD) { fprintf(mFD, "Reflow Stats\n"); const char * title = aStr?aStr:"No name"; fprintf(mFD, "
%s
", title); DoGrandHTMLTotals(); fprintf(mFD, "
\n"); fprintf(mFD, "\n"); fclose(mFD); mFD = nsnull; } #endif // not XP! } //------------------------------------------------------------------ PRIntn ReflowCountMgr::DoClearTotals(PLHashEntry *he, PRIntn i, void *arg) { ReflowCounter * counter = (ReflowCounter *)he->value; counter->ClearTotals(); return HT_ENUMERATE_NEXT; } //------------------------------------------------------------------ void ReflowCountMgr::ClearTotals() { PL_HashTableEnumerateEntries(mCounts, DoClearTotals, this); } //------------------------------------------------------------------ void ReflowCountMgr::ClearGrandTotals() { if (nsnull != mCounts) { ReflowCounter * gTots = (ReflowCounter *)PL_HashTableLookup(mCounts, kGrandTotalsStr); if (gTots == nsnull) { gTots = new ReflowCounter(this); PL_HashTableAdd(mCounts, NS_strdup(kGrandTotalsStr), gTots); } else { gTots->ClearTotals(); gTots->SetTotalsCache(); } } } //------------------------------------------------------------------ PRIntn ReflowCountMgr::DoDisplayDiffTotals(PLHashEntry *he, PRIntn i, void *arg) { PRBool cycledOnce = (arg != 0); char *str = (char *)he->key; ReflowCounter * counter = (ReflowCounter *)he->value; if (cycledOnce) { counter->CalcDiffInTotals(); counter->DisplayDiffTotals(str); } counter->SetTotalsCache(); return HT_ENUMERATE_NEXT; } //------------------------------------------------------------------ void ReflowCountMgr::DisplayDiffsInTotals(const char * aStr) { if (mCycledOnce) { printf("Differences\n"); for (PRInt32 i=0;i<78;i++) { printf("-"); } printf("\n"); ClearGrandTotals(); } PL_HashTableEnumerateEntries(mCounts, DoDisplayDiffTotals, (void *)mCycledOnce); mCycledOnce = PR_TRUE; } #endif // MOZ_REFLOW_PERF // make a color string like #RRGGBB void ColorToString(nscolor aColor, nsAutoString &aString) { char buf[8]; PR_snprintf(buf, sizeof(buf), "#%02x%02x%02x", NS_GET_R(aColor), NS_GET_G(aColor), NS_GET_B(aColor)); CopyASCIItoUTF16(buf, aString); } nsIFrame* nsIPresShell::GetAbsoluteContainingBlock(nsIFrame *aFrame) { return FrameConstructor()->GetAbsoluteContainingBlock(aFrame); }