/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- * * The contents of this file are subject to the Netscape 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/NPL/ * * 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 Netscape are * Copyright (C) 1998 Netscape Communications Corporation. All * Rights Reserved. * * Contributor(s): */ #define PL_ARENA_CONST_ALIGN_MASK 3 #include "nsIPresShell.h" #include "nsIPresContext.h" #include "nsIContent.h" #include "nsIDocument.h" #include "nsIDocumentObserver.h" #include "nsIStyleSet.h" #include "nsICSSStyleSheet.h" // XXX for UA sheet loading hack, can this go away please? #include "nsIStyleContext.h" #include "nsIServiceManager.h" #include "nsFrame.h" #include "nsIReflowCommand.h" #include "nsIViewManager.h" #include "nsCRT.h" #include "prlog.h" #include "prinrval.h" #include "nsVoidArray.h" #include "nsIPref.h" #include "nsIViewObserver.h" #include "nsContainerFrame.h" #include "nsHTMLIIDs.h" #include "nsIDeviceContext.h" #include "nsIEventStateManager.h" #include "nsDOMEvent.h" #include "nsHTMLParts.h" #include "nsIDOMSelection.h" #include "nsISelectionController.h" #include "nsLayoutCID.h" #include "nsIDOMRange.h" #include "nsIDOMDocument.h" #include "nsIDOMNode.h" #include "nsIDOMElement.h" #include "nsHTMLAtoms.h" #include "nsCOMPtr.h" #include "nsWeakReference.h" #include "nsICaret.h" #include "nsIDOMHTMLDocument.h" #include "nsIXMLDocument.h" #include "nsIScrollableView.h" #include "nsIParser.h" #include "nsParserCIID.h" #include "nsHTMLContentSinkStream.h" #include "nsHTMLToTXTSinkStream.h" #include "nsXIFDTD.h" #include "nsIFrameSelection.h" #include "nsViewsCID.h" #include "nsIFrameManager.h" #include "nsISupportsPrimitives.h" #include "nsILayoutHistoryState.h" #include "nsIScrollPositionListener.h" #include "nsICompositeListener.h" #include "nsTimer.h" #include "nsWeakPtr.h" #include "plarena.h" #ifdef MOZ_PERF_METRICS #include "nsITimeRecorder.h" #endif #ifdef NS_DEBUG #include "nsIFrameDebug.h" #endif // Drag & Drop, Clipboard #include "nsWidgetsCID.h" #include "nsIClipboard.h" #include "nsITransferable.h" #include "nsIFormatConverter.h" #include "nsIDocShellTreeItem.h" #include "nsIBrowserWindow.h" #include "nsIURI.h" #include "nsIEventQueue.h" #include "nsIEventQueueService.h" #include "nsIScrollableFrame.h" #include "prtime.h" #include "prlong.h" // Drag & Drop, Clipboard Support static NS_DEFINE_CID(kCClipboardCID, NS_CLIPBOARD_CID); static NS_DEFINE_CID(kCTransferableCID, NS_TRANSFERABLE_CID); static NS_DEFINE_IID(kCXIFConverterCID, NS_XIFFORMATCONVERTER_CID); #undef NOISY // comment out to hide caret #define SHOW_CARET //---------------------------------------------------------------------- // Class IID's static NS_DEFINE_IID(kFrameSelectionCID, NS_FRAMESELECTION_CID); static NS_DEFINE_IID(kCRangeCID, NS_RANGE_CID); static NS_DEFINE_IID(kEventQueueServiceCID, NS_EVENTQUEUESERVICE_CID); static NS_DEFINE_CID(kPrefServiceCID, NS_PREF_CID); // IID's static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID); static NS_DEFINE_IID(kIPresShellIID, NS_IPRESSHELL_IID); static NS_DEFINE_IID(kIDocumentObserverIID, NS_IDOCUMENT_OBSERVER_IID); static NS_DEFINE_IID(kIViewObserverIID, NS_IVIEWOBSERVER_IID); static NS_DEFINE_IID(kIFrameSelectionIID, NS_IFRAMESELECTION_IID); static NS_DEFINE_IID(kIDOMSelectionIID, NS_IDOMSELECTION_IID); static NS_DEFINE_IID(kIDOMNodeIID, NS_IDOMNODE_IID); static NS_DEFINE_IID(kIDOMRangeIID, NS_IDOMRANGE_IID); static NS_DEFINE_IID(kIDOMDocumentIID, NS_IDOMDOCUMENT_IID); static NS_DEFINE_IID(kIFocusTrackerIID, NS_IFOCUSTRACKER_IID); static NS_DEFINE_IID(kISelectionControllerIID, NS_ISELECTIONCONTROLLER_IID); static NS_DEFINE_IID(kICaretIID, NS_ICARET_IID); static NS_DEFINE_IID(kICaretID, NS_ICARET_IID); static NS_DEFINE_IID(kIDOMHTMLDocumentIID, NS_IDOMHTMLDOCUMENT_IID); static NS_DEFINE_IID(kIXMLDocumentIID, NS_IXMLDOCUMENT_IID); static NS_DEFINE_IID(kIContentIID, NS_ICONTENT_IID); static NS_DEFINE_IID(kIScrollableViewIID, NS_ISCROLLABLEVIEW_IID); static NS_DEFINE_IID(kViewCID, NS_VIEW_CID); static NS_DEFINE_IID(kIScrollableFrameIID, NS_ISCROLLABLE_FRAME_IID); // The upper bound on the amount of time to spend reflowing. 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. // It is used only when asynchronous reflow is enabled by setting gDoAsyncReflow to PR_TRUE. #define NS_MAX_REFLOW_TIME 1000000 static PRInt32 gMaxRCProcessingTime = -1; // Largest chunk size we recycle static const int gMaxRecycledSize = 200; // Flag for enabling/disabling asynchronous reflow // Set via the "layout.reflow.async" pref static PRBool gDoAsyncReflow = PR_FALSE; // Memory is allocated 4-byte aligned. We have recyclers for chunks up to // 200 bytes class FrameArena { public: FrameArena(PRUint32 aArenaSize = 2048); ~FrameArena(); // Memory management functions nsresult AllocateFrame(size_t aSize, void** aResult); nsresult FreeFrame(size_t aSize, void* aPtr); private: // 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]; }; FrameArena::FrameArena(PRUint32 aArenaSize) { // Initialize the arena pool PL_INIT_ARENA_POOL(&mPool, "FrameArena", aArenaSize); // Zero out the recyclers array nsCRT::memset(mRecyclers, 0, sizeof(mRecyclers)); } FrameArena::~FrameArena() { // Free the arena in the pool and finish using it PL_FinishArenaPool(&mPool); } nsresult FrameArena::AllocateFrame(size_t aSize, void** aResult) { void* result = nsnull; // Round size to multiple of 4 PR_ROUNDUP(aSize, 4); // 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); } *aResult = result; return NS_OK; } nsresult FrameArena::FreeFrame(size_t aSize, void* aPtr) { // Round size to multiple of 4 PR_ROUNDUP(aSize, 4); // 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; } return NS_OK; } class PresShellViewEventListener : public nsIScrollPositionListener, public nsICompositeListener { public: PresShellViewEventListener(); virtual ~PresShellViewEventListener(); NS_DECL_ISUPPORTS // nsIScrollPositionListener methods NS_IMETHOD ScrollPositionWillChange(nsIScrollableView *aView, nscoord aX, nscoord aY); NS_IMETHOD ScrollPositionDidChange(nsIScrollableView *aView, nscoord aX, nscoord aY); // nsICompositeListener methods NS_IMETHOD WillRefreshRegion(nsIViewManager *aViewManager, nsIView *aView, nsIRenderingContext *aContext, nsIRegion *aRegion, PRUint32 aUpdateFlags); NS_IMETHOD DidRefreshRegion(nsIViewManager *aViewManager, nsIView *aView, nsIRenderingContext *aContext, nsIRegion *aRegion, PRUint32 aUpdateFlags); NS_IMETHOD WillRefreshRect(nsIViewManager *aViewManager, nsIView *aView, nsIRenderingContext *aContext, const nsRect *aRect, PRUint32 aUpdateFlags); NS_IMETHOD DidRefreshRect(nsIViewManager *aViewManager, nsIView *aView, nsIRenderingContext *aContext, const nsRect *aRect, PRUint32 aUpdateFlags); nsresult SetPresShell(nsIPresShell *aPresShell); private: nsresult HideCaret(); nsresult RestoreCaretVisibility(); nsIPresShell *mPresShell; PRBool mWasVisible; PRInt32 mCallCount; }; class PresShell : public nsIPresShell, public nsIViewObserver, private nsIDocumentObserver, public nsIFocusTracker, public nsISelectionController, public nsSupportsWeakReference { public: PresShell(); NS_DECL_AND_IMPL_ZEROING_OPERATOR_NEW // nsISupports NS_DECL_ISUPPORTS // nsIPresShell NS_IMETHOD Init(nsIDocument* aDocument, nsIPresContext* aPresContext, nsIViewManager* aViewManager, nsIStyleSet* aStyleSet); NS_IMETHOD AllocateFrame(size_t aSize, void** aResult); NS_IMETHOD FreeFrame(size_t aSize, void* aFreeChunk); NS_IMETHOD GetDocument(nsIDocument** aResult); NS_IMETHOD GetPresContext(nsIPresContext** aResult); NS_IMETHOD GetViewManager(nsIViewManager** aResult); NS_IMETHOD GetStyleSet(nsIStyleSet** aResult); NS_IMETHOD GetActiveAlternateStyleSheet(nsString& aSheetTitle); NS_IMETHOD SelectAlternateStyleSheet(const nsString& aSheetTitle); NS_IMETHOD ListAlternateStyleSheets(nsStringArray& aTitleList); NS_IMETHOD GetSelection(SelectionType aType, nsIDOMSelection** aSelection); NS_IMETHOD ScrollSelectionIntoView(SelectionType aType, SelectionRegion aRegion); NS_IMETHOD RepaintSelection(SelectionType aType); NS_IMETHOD GetFrameSelection(nsIFrameSelection** aSelection); NS_IMETHOD EnterReflowLock(); NS_IMETHOD ExitReflowLock(PRBool aTryToReflow, PRBool aDoSynchronousReflow); NS_IMETHOD BeginObservingDocument(); NS_IMETHOD EndObservingDocument(); NS_IMETHOD InitialReflow(nscoord aWidth, nscoord aHeight); NS_IMETHOD ResizeReflow(nscoord aWidth, nscoord aHeight); NS_IMETHOD StyleChangeReflow(); NS_IMETHOD GetRootFrame(nsIFrame** aFrame) const; NS_IMETHOD GetPageSequenceFrame(nsIPageSequenceFrame** aResult) const; NS_IMETHOD GetPrimaryFrameFor(nsIContent* aContent, nsIFrame** aPrimaryFrame) const; NS_IMETHOD GetStyleContextFor(nsIFrame* aFrame, nsIStyleContext** aStyleContext) const; NS_IMETHOD GetLayoutObjectFor(nsIContent* aContent, nsISupports** aResult) const; NS_IMETHOD GetPlaceholderFrameFor(nsIFrame* aFrame, nsIFrame** aPlaceholderFrame) const; NS_IMETHOD AppendReflowCommand(nsIReflowCommand* aReflowCommand); NS_IMETHOD CancelReflowCommand(nsIFrame* aTargetFrame); NS_IMETHOD ProcessReflowCommands(); NS_IMETHOD ClearFrameRefs(nsIFrame* aFrame); NS_IMETHOD CreateRenderingContext(nsIFrame *aFrame, nsIRenderingContext** aContext); NS_IMETHOD CantRenderReplacedElement(nsIPresContext* aPresContext, nsIFrame* aFrame); NS_IMETHOD GoToAnchor(const nsString& aAnchorName) const; NS_IMETHOD ScrollFrameIntoView(nsIFrame *aFrame, PRIntn aVPercent, PRIntn aHPercent) const; NS_IMETHOD NotifyDestroyingFrame(nsIFrame* aFrame); NS_IMETHOD GetFrameManager(nsIFrameManager** aFrameManager) const; NS_IMETHOD DoCopy(); // XXX This function needs to be renamed to something better. // It is not simply a getter for the layout history state. It // creates a new state object and captures frame state onto it NS_IMETHOD GetHistoryState(nsILayoutHistoryState** aLayoutHistoryState); NS_IMETHOD SetHistoryState(nsILayoutHistoryState* aLayoutHistoryState); NS_IMETHOD GetReflowEventStatus(PRBool* aPending); NS_IMETHOD SetReflowEventStatus(PRBool aPending); //nsIViewObserver interface NS_IMETHOD Paint(nsIView *aView, nsIRenderingContext& aRenderingContext, const nsRect& aDirtyRect); NS_IMETHOD HandleEvent(nsIView* aView, nsGUIEvent* aEvent, nsEventStatus* aEventStatus); NS_IMETHOD Scrolled(nsIView *aView); NS_IMETHOD ResizeReflow(nsIView *aView, nscoord aWidth, nscoord aHeight); //nsIFocusTracker interface NS_IMETHOD ScrollFrameIntoView(nsIFrame *aFrame); // caret handling NS_IMETHOD GetCaret(nsICaret **aOutCaret); NS_IMETHOD SetCaretEnabled(PRBool aaInEnable); NS_IMETHOD GetCaretEnabled(PRBool *aOutEnabled); NS_IMETHOD SetDisplayNonTextSelection(PRBool aaInEnable); NS_IMETHOD GetDisplayNonTextSelection(PRBool *aOutEnable); // nsISelectionController NS_IMETHOD CharacterMove(PRBool aForward, PRBool aExtend); NS_IMETHOD WordMove(PRBool aForward, PRBool aExtend); 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(); // nsIDocumentObserver NS_IMETHOD BeginUpdate(nsIDocument *aDocument); NS_IMETHOD EndUpdate(nsIDocument *aDocument); NS_IMETHOD BeginLoad(nsIDocument *aDocument); NS_IMETHOD EndLoad(nsIDocument *aDocument); NS_IMETHOD BeginReflow(nsIDocument *aDocument, nsIPresShell* aShell); NS_IMETHOD EndReflow(nsIDocument *aDocument, nsIPresShell* aShell); NS_IMETHOD ContentChanged(nsIDocument *aDocument, nsIContent* aContent, nsISupports* aSubContent); NS_IMETHOD ContentStatesChanged(nsIDocument* aDocument, nsIContent* aContent1, nsIContent* aContent2); NS_IMETHOD AttributeChanged(nsIDocument *aDocument, nsIContent* aContent, PRInt32 aNameSpaceID, nsIAtom* aAttribute, PRInt32 aHint); NS_IMETHOD ContentAppended(nsIDocument *aDocument, nsIContent* aContainer, PRInt32 aNewIndexInContainer); NS_IMETHOD ContentInserted(nsIDocument *aDocument, nsIContent* aContainer, nsIContent* aChild, PRInt32 aIndexInContainer); NS_IMETHOD ContentReplaced(nsIDocument *aDocument, nsIContent* aContainer, nsIContent* aOldChild, nsIContent* aNewChild, PRInt32 aIndexInContainer); NS_IMETHOD ContentRemoved(nsIDocument *aDocument, nsIContent* aContainer, nsIContent* aChild, PRInt32 aIndexInContainer); NS_IMETHOD StyleSheetAdded(nsIDocument *aDocument, nsIStyleSheet* aStyleSheet); NS_IMETHOD StyleSheetRemoved(nsIDocument *aDocument, nsIStyleSheet* aStyleSheet); NS_IMETHOD StyleSheetDisabledStateChanged(nsIDocument *aDocument, nsIStyleSheet* aStyleSheet, PRBool aDisabled); NS_IMETHOD StyleRuleChanged(nsIDocument *aDocument, nsIStyleSheet* aStyleSheet, nsIStyleRule* aStyleRule, PRInt32 aHint); NS_IMETHOD StyleRuleAdded(nsIDocument *aDocument, nsIStyleSheet* aStyleSheet, nsIStyleRule* aStyleRule); NS_IMETHOD StyleRuleRemoved(nsIDocument *aDocument, nsIStyleSheet* aStyleSheet, nsIStyleRule* aStyleRule); NS_IMETHOD DocumentWillBeDestroyed(nsIDocument *aDocument); protected: virtual ~PresShell(); nsresult ReconstructFrames(void); PRBool mCaretEnabled; nsresult CloneStyleSet(nsIStyleSet* aSet, nsIStyleSet** aResult); #ifdef NS_DEBUG PRBool VerifyIncrementalReflow(); PRBool mInVerifyReflow; #endif // IMPORTANT: The ownership implicit in the following member variables has been // explicitly checked and set using nsCOMPtr for owning pointers and raw COM interface // pointers for weak (ie, non owning) references. If you add any members to this // class, please make the ownership explicit (pinkerton, scc). // these are the same Document and PresContext owned by the DocViewer. // we must share ownership. nsCOMPtr mDocument; nsCOMPtr mPresContext; nsCOMPtr mStyleSet; nsIViewManager* mViewManager; // [WEAK] docViewer owns it so I don't have to nsILayoutHistoryState* mHistoryState; // [WEAK] session history owns this PRUint32 mUpdateCount; nsVoidArray mReflowCommands; PRUint32 mReflowLockCount; PRBool mIsDestroying; nsIFrame* mCurrentEventFrame; nsIContent* mCurrentEventContent; nsVoidArray mCurrentEventFrameStack; nsCOMPtr mSelection; nsCOMPtr mCaret; PRBool mDisplayNonTextSelection; PRBool mScrollingEnabled; //used to disable programmable scrolling from outside nsIFrameManager* mFrameManager; // we hold a reference PresShellViewEventListener *mViewEventListener; PRBool mPendingReflowEvent; nsCOMPtr mEventQueue; FrameArena mFrameArena; PRInt32 mAccumulatedReflowTime; // Time spent in reflow command processing so far MOZ_TIMER_DECLARE(mReflowWatch) // Used for measuring time spent in reflow MOZ_TIMER_DECLARE(mFrameCreationWatch) // Used for measuring time spent in frame creation #ifdef DEBUG_nisheeth PRInt32 mReflows; PRInt32 mDiscardedReflowCommands; #endif private: //helper funcs for disabing autoscrolling void DisableScrolling(){mScrollingEnabled = PR_FALSE;} void EnableScrolling(){mScrollingEnabled = PR_TRUE;} PRBool IsScrollingEnabled(){return mScrollingEnabled;} //helper funcs for event handling nsIFrame* GetCurrentEventFrame(); void PushCurrentEventFrame(); void PopCurrentEventFrame(); // helper function for posting reflow events void PostReflowEvent(); PRBool AlreadyInQueue(nsIReflowCommand* aReflowCommand); }; #ifdef NS_DEBUG static void VerifyStyleTree(nsIFrameManager* aFrameManager) { if (aFrameManager && nsIFrameDebug::GetVerifyStyleTreeEnable()) { nsIFrame* rootFrame; aFrameManager->GetRootFrame(&rootFrame); aFrameManager->DebugVerifyStyleTree(rootFrame); } } #define VERIFY_STYLE_TREE VerifyStyleTree(mFrameManager) #else #define VERIFY_STYLE_TREE #endif #ifdef NS_DEBUG /** * Note: the log module is created during library initialization which * means that you cannot perform logging before then. */ static PRLogModuleInfo* gLogModule; static PRUint32 gVerifyReflowFlags; #define VERIFY_REFLOW_ON 0x01 #define VERIFY_REFLOW_NOISY 0x02 #define VERIFY_REFLOW_ALL 0x04 #define VERIFY_REFLOW_DUMP_COMMANDS 0x08 #define VERIFY_REFLOW_NOISY_RC 0x10 #define VERIFY_REFLOW_REALLY_NOISY_RC 0x20 #endif static PRBool gVerifyReflowEnabled; NS_LAYOUT PRBool nsIPresShell::GetVerifyReflowEnable() { #ifdef NS_DEBUG static PRBool firstTime = PR_TRUE; if (firstTime) { firstTime = PR_FALSE; gLogModule = PR_NewLogModule("verifyreflow"); gVerifyReflowFlags = gLogModule->level; if (VERIFY_REFLOW_ON & gVerifyReflowFlags) { gVerifyReflowEnabled = PR_TRUE; } printf("Note: verifyreflow is %sabled", gVerifyReflowEnabled ? "en" : "dis"); 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; } NS_LAYOUT void nsIPresShell::SetVerifyReflowEnable(PRBool aEnabled) { gVerifyReflowEnabled = aEnabled; } //---------------------------------------------------------------------- NS_LAYOUT 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(kIPresShellIID, (void **) aInstancePtrResult); } PresShell::PresShell() { mIsDestroying = PR_FALSE; mCaretEnabled = PR_FALSE; mDisplayNonTextSelection = PR_FALSE; mCurrentEventContent = nsnull; mCurrentEventFrame = nsnull; EnableScrolling(); mPendingReflowEvent = PR_FALSE; #ifdef DEBUG_nisheeth mReflows = 0; mDiscardedReflowCommands = 0; #endif } NS_IMPL_ADDREF(PresShell) NS_IMPL_RELEASE(PresShell) nsresult PresShell::QueryInterface(const nsIID& aIID, void** aInstancePtr) { if (aIID.Equals(kIPresShellIID)) { nsIPresShell* tmp = this; *aInstancePtr = (void*) tmp; NS_ADDREF_THIS(); return NS_OK; } if (aIID.Equals(kIDocumentObserverIID)) { nsIDocumentObserver* tmp = this; *aInstancePtr = (void*) tmp; NS_ADDREF_THIS(); return NS_OK; } if (aIID.Equals(kIViewObserverIID)) { nsIViewObserver* tmp = this; *aInstancePtr = (void*) tmp; NS_ADDREF_THIS(); return NS_OK; } if (aIID.Equals(kIFocusTrackerIID)) { nsIFocusTracker* tmp = this; *aInstancePtr = (void*) tmp; NS_ADDREF_THIS(); return NS_OK; } if (aIID.Equals(kISelectionControllerIID)) { nsISelectionController* tmp = this; *aInstancePtr = (void*) tmp; NS_ADDREF_THIS(); return NS_OK; } if (aIID.Equals(nsCOMTypeInfo::GetIID())) { nsISupportsWeakReference* tmp = this; *aInstancePtr = (void*) tmp; NS_ADDREF_THIS(); return NS_OK; } if (aIID.Equals(kISupportsIID)) { nsIPresShell* tmp = this; nsISupports* tmp2 = tmp; *aInstancePtr = (void*) tmp2; NS_ADDREF_THIS(); return NS_OK; } return NS_NOINTERFACE; } PresShell::~PresShell() { mRefCnt = 99;/* XXX hack! get around re-entrancy bugs */ mIsDestroying = PR_TRUE; // Clobber weak leaks in case of re-entrancy during tear down mHistoryState = nsnull; NS_IF_RELEASE(mCurrentEventContent); if (mViewManager) { // Disable paints during tear down of the frame tree mViewManager->DisableRefresh(); mViewManager = nsnull; } // Destroy the frame manager. This will destroy the frame hierarchy NS_IF_RELEASE(mFrameManager); if (mDocument) { mDocument->DeleteShell(this); } // 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 if (mPresContext) { mPresContext->SetShell(nsnull); } mRefCnt = 0; if (mViewEventListener) { mViewEventListener->SetPresShell((nsIPresShell*)nsnull); NS_RELEASE(mViewEventListener); } } /** * Initialize the presentation shell. Create view manager and style * manager. */ nsresult PresShell::Init(nsIDocument* aDocument, nsIPresContext* aPresContext, nsIViewManager* aViewManager, nsIStyleSet* aStyleSet) { NS_PRECONDITION(nsnull != aDocument, "null ptr"); NS_PRECONDITION(nsnull != aPresContext, "null ptr"); NS_PRECONDITION(nsnull != aViewManager, "null ptr"); if ((nsnull == aDocument) || (nsnull == aPresContext) || (nsnull == aViewManager)) { return NS_ERROR_NULL_POINTER; } if (mDocument) { return NS_ERROR_ALREADY_INITIALIZED; } mDocument = dont_QueryInterface(aDocument); mViewManager = aViewManager; //doesn't add a ref since we own it... MMP mViewManager->SetViewObserver((nsIViewObserver *)this); // Bind the context to the presentation shell. mPresContext = dont_QueryInterface(aPresContext); aPresContext->SetShell(this); mStyleSet = dont_QueryInterface(aStyleSet); mHistoryState = nsnull; nsresult result = nsComponentManager::CreateInstance(kFrameSelectionCID, nsnull, nsIFrameSelection::GetIID(), getter_AddRefs(mSelection)); if (!NS_SUCCEEDED(result)) return result; // Create and initialize the frame manager result = NS_NewFrameManager(&mFrameManager); if (NS_FAILED(result)) { return result; } result = mFrameManager->Init(this, mStyleSet); if (NS_FAILED(result)) { return result; } result = mSelection->Init((nsIFocusTracker *) this); if (!NS_SUCCEEDED(result)) return result; // 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); } //SetCaretEnabled(PR_TRUE); // make it show in browser windows #endif //set up selection to be displayed in document nsCOMPtr container; result = aPresContext->GetContainer(getter_AddRefs(container)); if (NS_SUCCEEDED(result) && container) { nsCOMPtr docShell(do_QueryInterface(container, &result)); if (NS_SUCCEEDED(result) && docShell){ PRInt32 docShellType; result = docShell->GetItemType(&docShellType); if (NS_SUCCEEDED(result)){ if (nsIDocShellTreeItem::typeContent == docShellType){ mDocument->SetDisplaySelection(PR_TRUE); } } } } // Cache the event queue of the current UI thread NS_WITH_SERVICE(nsIEventQueueService, eventService, kEventQueueServiceCID, &result); if (NS_SUCCEEDED(result)) // XXX this implies that the UI is the current thread. result = eventService->GetThreadEventQueue(NS_CURRENT_THREAD, getter_AddRefs(mEventQueue)); if (gMaxRCProcessingTime == -1) { // First, set the defaults gMaxRCProcessingTime = NS_MAX_REFLOW_TIME; gDoAsyncReflow = PR_FALSE; // Get the prefs service NS_WITH_SERVICE(nsIPref, prefs, kPrefServiceCID, &result); if (NS_SUCCEEDED(result)) { PRInt32 timeSlice; prefs->GetIntPref("layout.reflow.timeslice", &timeSlice); // Enable after fixing the Mac build // LL_I2L(gMaxRCProcessingTime, timeSlice); prefs->GetBoolPref("layout.reflow.async", &gDoAsyncReflow); } } return NS_OK; } NS_IMETHODIMP PresShell::FreeFrame(size_t aSize, void* aPtr) { mFrameArena.FreeFrame(aSize, aPtr); return NS_OK; } NS_IMETHODIMP PresShell::AllocateFrame(size_t aSize, void** aResult) { return mFrameArena.AllocateFrame(aSize, aResult); } NS_IMETHODIMP PresShell::EnterReflowLock() { ++mReflowLockCount; return NS_OK; } NS_IMETHODIMP PresShell::ExitReflowLock(PRBool aTryToReflow, PRBool aDoSynchronousReflow) { PRUint32 newReflowLockCount = mReflowLockCount - 1; if (newReflowLockCount == 0 && aTryToReflow) { if (aDoSynchronousReflow) ProcessReflowCommands(); else PostReflowEvent(); } mReflowLockCount = newReflowLockCount; return NS_OK; } NS_IMETHODIMP PresShell::GetDocument(nsIDocument** aResult) { NS_PRECONDITION(nsnull != aResult, "null ptr"); if (nsnull == aResult) { return NS_ERROR_NULL_POINTER; } *aResult = mDocument; NS_IF_ADDREF(*aResult); return NS_OK; } NS_IMETHODIMP PresShell::GetPresContext(nsIPresContext** aResult) { NS_PRECONDITION(nsnull != aResult, "null ptr"); if (nsnull == aResult) { return NS_ERROR_NULL_POINTER; } *aResult = mPresContext; NS_IF_ADDREF(*aResult); return NS_OK; } NS_IMETHODIMP PresShell::GetViewManager(nsIViewManager** aResult) { NS_PRECONDITION(nsnull != aResult, "null ptr"); if (nsnull == aResult) { return NS_ERROR_NULL_POINTER; } *aResult = mViewManager; NS_IF_ADDREF(mViewManager); return NS_OK; } NS_IMETHODIMP PresShell::GetStyleSet(nsIStyleSet** aResult) { NS_PRECONDITION(nsnull != aResult, "null ptr"); if (nsnull == aResult) { return NS_ERROR_NULL_POINTER; } *aResult = mStyleSet; NS_IF_ADDREF(*aResult); return NS_OK; } NS_IMETHODIMP PresShell::GetActiveAlternateStyleSheet(nsString& aSheetTitle) { // first non-html sheet in style set that has title if (mStyleSet) { PRInt32 count = mStyleSet->GetNumberOfDocStyleSheets(); PRInt32 index; nsAutoString textHtml("text/html"); for (index = 0; index < count; index++) { nsIStyleSheet* sheet = mStyleSet->GetDocStyleSheetAt(index); if (nsnull != sheet) { nsAutoString type; sheet->GetType(type); if (PR_FALSE == type.Equals(textHtml)) { nsAutoString title; sheet->GetTitle(title); if (0 < title.Length()) { aSheetTitle = title; index = count; // stop looking } } NS_RELEASE(sheet); } } } return NS_OK; } NS_IMETHODIMP PresShell::SelectAlternateStyleSheet(const nsString& aSheetTitle) { if (mDocument && mStyleSet) { PRInt32 count = mDocument->GetNumberOfStyleSheets(); PRInt32 index; nsAutoString textHtml("text/html"); for (index = 0; index < count; index++) { nsIStyleSheet* sheet = mDocument->GetStyleSheetAt(index); if (nsnull != sheet) { nsAutoString type; sheet->GetType(type); if (PR_FALSE == type.Equals(textHtml)) { nsAutoString title; sheet->GetTitle(title); if (0 < title.Length()) { if (title.EqualsIgnoreCase(aSheetTitle)) { mStyleSet->AddDocStyleSheet(sheet, mDocument); } else { mStyleSet->RemoveDocStyleSheet(sheet); } } } NS_RELEASE(sheet); } } ReconstructFrames(); } return NS_OK; } NS_IMETHODIMP PresShell::ListAlternateStyleSheets(nsStringArray& aTitleList) { if (mDocument) { PRInt32 count = mDocument->GetNumberOfStyleSheets(); PRInt32 index; nsAutoString textHtml("text/html"); for (index = 0; index < count; index++) { nsIStyleSheet* sheet = mDocument->GetStyleSheetAt(index); if (nsnull != sheet) { nsAutoString type; sheet->GetType(type); if (PR_FALSE == type.Equals(textHtml)) { nsAutoString title; sheet->GetTitle(title); if (0 < title.Length()) { if (-1 == aTitleList.IndexOfIgnoreCase(title)) { aTitleList.AppendString(title); } } } NS_RELEASE(sheet); } } } return NS_OK; } NS_IMETHODIMP PresShell::GetSelection(SelectionType aType, nsIDOMSelection **aSelection) { if (!aSelection || !mSelection) return NS_ERROR_NULL_POINTER; return mSelection->GetSelection(aType, aSelection); } NS_IMETHODIMP PresShell::ScrollSelectionIntoView(SelectionType aType, SelectionRegion aRegion) { if (!mSelection) return NS_ERROR_NULL_POINTER; return mSelection->ScrollSelectionIntoView(aType, aRegion); } NS_IMETHODIMP PresShell::RepaintSelection(SelectionType aType) { if (!mSelection) return NS_ERROR_NULL_POINTER; return mSelection->RepaintSelection(mPresContext, aType); } NS_IMETHODIMP PresShell::GetFrameSelection(nsIFrameSelection** aSelection) { if (!aSelection || !mSelection) return NS_ERROR_NULL_POINTER; *aSelection = mSelection; (*aSelection)->AddRef(); return NS_OK; } // Make shell be a document observer NS_IMETHODIMP PresShell::BeginObservingDocument() { if (mDocument) { mDocument->AddObserver(this); } return NS_OK; } // Make shell stop being a document observer NS_IMETHODIMP PresShell::EndObservingDocument() { if (mDocument) { mDocument->RemoveObserver(this); } if (mSelection){ nsCOMPtr domselection; nsresult result; result = mSelection->GetSelection(SELECTION_NORMAL, getter_AddRefs(domselection)); if (NS_FAILED(result)) return result; if (!domselection) return NS_ERROR_UNEXPECTED; mSelection->ShutDown(); } return NS_OK; } #ifdef DEBUG_kipp char* nsPresShell_ReflowStackPointerTop; #endif NS_IMETHODIMP PresShell::InitialReflow(nscoord aWidth, nscoord aHeight) { nsIContent* root = nsnull; #ifdef NS_DEBUG if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) { nsCOMPtr uri; if (mDocument) { uri = dont_AddRef(mDocument->GetDocumentURL()); if (uri) { char* url = nsnull; uri->GetSpec(&url); printf("*** PresShell::InitialReflow (this=%p, url='%s')\n", this, url); Recycle(url); } } } #endif StCaretHider caretHider(this); // stack-based class hides caret until dtor. EnterReflowLock(); if (mPresContext) { nsRect r(0, 0, aWidth, aHeight); mPresContext->SetVisibleArea(r); } if (mDocument) { root = mDocument->GetRootContent(); } // Get the root frame from the frame manager nsIFrame* rootFrame; mFrameManager->GetRootFrame(&rootFrame); if (nsnull != root) { MOZ_TIMER_DEBUGLOG(("Reset and start: Frame Creation: PresShell::InitialReflow(), this=%p\n", this)); MOZ_TIMER_RESET(mFrameCreationWatch); MOZ_TIMER_START(mFrameCreationWatch); if (!rootFrame) { // Have style sheet processor construct a frame for the // precursors to the root content object's frame mStyleSet->ConstructRootFrame(mPresContext, root, rootFrame); mFrameManager->SetRootFrame(rootFrame); } // Have the style sheet processor construct frame for the root // content object down mStyleSet->ContentInserted(mPresContext, nsnull, root, 0); NS_RELEASE(root); VERIFY_STYLE_TREE; MOZ_TIMER_DEBUGLOG(("Stop: Frame Creation: PresShell::InitialReflow(), this=%p\n", this)); MOZ_TIMER_STOP(mFrameCreationWatch); } if (rootFrame) { MOZ_TIMER_DEBUGLOG(("Reset and start: Reflow: PresShell::InitialReflow(), this=%p\n", this)); MOZ_TIMER_RESET(mReflowWatch); MOZ_TIMER_START(mReflowWatch); // Kick off a top-down reflow NS_FRAME_LOG(NS_FRAME_TRACE_CALLS, ("enter nsPresShell::InitialReflow: %d,%d", aWidth, aHeight)); #ifdef NS_DEBUG if (nsIFrameDebug::GetVerifyTreeEnable()) { nsIFrameDebug* frameDebug; if (NS_SUCCEEDED(rootFrame->QueryInterface(nsIFrameDebug::GetIID(), (void**)&frameDebug))) { frameDebug->VerifyTree(); } } #endif #ifdef DEBUG_kipp nsPresShell_ReflowStackPointerTop = (char*) &aWidth; #endif nsRect bounds; mPresContext->GetVisibleArea(bounds); nsSize maxSize(bounds.width, bounds.height); nsHTMLReflowMetrics desiredSize(nsnull); nsReflowStatus status; nsIRenderingContext* rcx = nsnull; CreateRenderingContext(rootFrame, &rcx); nsHTMLReflowState reflowState(mPresContext, rootFrame, eReflowReason_Initial, rcx, maxSize); nsIView* view; rootFrame->WillReflow(mPresContext); rootFrame->GetView(mPresContext, &view); if (view) { nsContainerFrame::PositionFrameView(mPresContext, rootFrame, view); } rootFrame->Reflow(mPresContext, desiredSize, reflowState, status); rootFrame->SizeTo(mPresContext, desiredSize.width, desiredSize.height); mPresContext->SetVisibleArea(nsRect(0,0,desiredSize.width,desiredSize.height)); if (view) { nsContainerFrame::SyncFrameViewAfterReflow(mPresContext, rootFrame, view, nsnull); } rootFrame->DidReflow(mPresContext, NS_FRAME_REFLOW_FINISHED); #ifdef NS_DEBUG if (nsIFrameDebug::GetVerifyTreeEnable()) { nsIFrameDebug* frameDebug; if (NS_SUCCEEDED(rootFrame->QueryInterface(nsIFrameDebug::GetIID(), (void**)&frameDebug))) { frameDebug->VerifyTree(); } } #endif VERIFY_STYLE_TREE; NS_IF_RELEASE(rcx); NS_FRAME_LOG(NS_FRAME_TRACE_CALLS, ("exit nsPresShell::InitialReflow")); MOZ_TIMER_DEBUGLOG(("Stop: Reflow: PresShell::InitialReflow(), this=%p\n", this)); MOZ_TIMER_STOP(mReflowWatch); } ExitReflowLock(PR_TRUE, PR_TRUE); if (mViewManager && mCaret && !mViewEventListener) { nsIScrollableView* scrollingView = nsnull; mViewManager->GetRootScrollableView(&scrollingView); if (scrollingView) { mViewEventListener = new PresShellViewEventListener; if (!mViewEventListener) return NS_ERROR_OUT_OF_MEMORY; NS_ADDREF(mViewEventListener); mViewEventListener->SetPresShell(this); scrollingView->AddScrollPositionListener((nsIScrollPositionListener *)mViewEventListener); mViewManager->AddCompositeListener((nsICompositeListener *)mViewEventListener); } } return NS_OK; //XXX this needs to be real. MMP } NS_IMETHODIMP PresShell::ResizeReflow(nscoord aWidth, nscoord aHeight) { StCaretHider caretHider(this); // stack-based class hides caret until dtor. EnterReflowLock(); if (mPresContext) { nsRect r(0, 0, aWidth, aHeight); mPresContext->SetVisibleArea(r); } // If we don't have a root frame yet, that means we haven't had our initial // reflow... nsIFrame* rootFrame; mFrameManager->GetRootFrame(&rootFrame); if (rootFrame) { // Kick off a top-down reflow NS_FRAME_LOG(NS_FRAME_TRACE_CALLS, ("enter nsPresShell::ResizeReflow: %d,%d", aWidth, aHeight)); #ifdef NS_DEBUG if (nsIFrameDebug::GetVerifyTreeEnable()) { nsIFrameDebug* frameDebug; if (NS_SUCCEEDED(rootFrame->QueryInterface(nsIFrameDebug::GetIID(), (void**)&frameDebug))) { frameDebug->VerifyTree(); } } #endif #ifdef DEBUG_kipp nsPresShell_ReflowStackPointerTop = (char*) &aWidth; #endif nsRect bounds; mPresContext->GetVisibleArea(bounds); nsSize maxSize(bounds.width, bounds.height); nsHTMLReflowMetrics desiredSize(nsnull); nsReflowStatus status; nsIRenderingContext* rcx = nsnull; CreateRenderingContext(rootFrame, &rcx); nsHTMLReflowState reflowState(mPresContext, rootFrame, eReflowReason_Resize, rcx, maxSize); nsIView* view; rootFrame->WillReflow(mPresContext); rootFrame->GetView(mPresContext, &view); if (view) { nsContainerFrame::PositionFrameView(mPresContext, rootFrame, view); } rootFrame->Reflow(mPresContext, desiredSize, reflowState, status); rootFrame->SizeTo(mPresContext, desiredSize.width, desiredSize.height); if (view) { nsContainerFrame::SyncFrameViewAfterReflow(mPresContext, rootFrame, view, nsnull); } rootFrame->DidReflow(mPresContext, NS_FRAME_REFLOW_FINISHED); #ifdef NS_DEBUG if (nsIFrameDebug::GetVerifyTreeEnable()) { nsIFrameDebug* frameDebug; if (NS_SUCCEEDED(rootFrame->QueryInterface(nsIFrameDebug::GetIID(), (void**)&frameDebug))) { frameDebug->VerifyTree(); } } #endif VERIFY_STYLE_TREE; NS_IF_RELEASE(rcx); NS_FRAME_LOG(NS_FRAME_TRACE_CALLS, ("exit nsPresShell::ResizeReflow")); // XXX if debugging then we should assert that the cache is empty } else { #ifdef NOISY printf("PresShell::ResizeReflow: null root frame\n"); #endif } ExitReflowLock(PR_TRUE, PR_TRUE); return NS_OK; //XXX this needs to be real. MMP } NS_IMETHODIMP PresShell::ScrollFrameIntoView(nsIFrame *aFrame){ if (!aFrame) return NS_ERROR_NULL_POINTER; if (IsScrollingEnabled()) return ScrollFrameIntoView(aFrame, NS_PRESSHELL_SCROLL_ANYWHERE, NS_PRESSHELL_SCROLL_ANYWHERE); return NS_OK; } NS_IMETHODIMP PresShell::NotifyDestroyingFrame(nsIFrame* aFrame) { // Cancel any pending reflow commands targeted at this frame CancelReflowCommand(aFrame); // Notify the frame manager if (mFrameManager) { mFrameManager->NotifyDestroyingFrame(aFrame); } return NS_OK; } NS_IMETHODIMP PresShell::GetFrameManager(nsIFrameManager** aFrameManager) const { *aFrameManager = mFrameManager; NS_IF_ADDREF(mFrameManager); return NS_OK; } NS_IMETHODIMP PresShell::GetCaret(nsICaret **outCaret) { if (!outCaret || !mCaret) return NS_ERROR_NULL_POINTER; return mCaret->QueryInterface(kICaretIID,(void **)outCaret); } NS_IMETHODIMP PresShell::SetCaretEnabled(PRBool aInEnable) { nsresult result = NS_OK; PRBool oldEnabled = mCaretEnabled; mCaretEnabled = aInEnable; if (mCaret && (mCaretEnabled != oldEnabled)) { if (mCaretEnabled) result = mCaret->SetCaretVisible(PR_TRUE); else result = mCaret->SetCaretVisible(PR_FALSE); } return result; } NS_IMETHODIMP PresShell::GetCaretEnabled(PRBool *aOutEnabled) { if (!aOutEnabled) { return NS_ERROR_INVALID_ARG; } *aOutEnabled = mCaretEnabled; return NS_OK; } NS_IMETHODIMP PresShell::SetDisplayNonTextSelection(PRBool aInEnable) { mDisplayNonTextSelection = PR_TRUE; return NS_OK; } NS_IMETHODIMP PresShell::GetDisplayNonTextSelection(PRBool *aOutEnable) { if (!aOutEnable) return NS_ERROR_INVALID_ARG; *aOutEnable = mDisplayNonTextSelection; 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::LineMove(PRBool aForward, PRBool aExtend) { return mSelection->LineMove(aForward, aExtend); } NS_IMETHODIMP PresShell::IntraLineMove(PRBool aForward, PRBool aExtend) { return mSelection->IntraLineMove(aForward, aExtend); } NS_IMETHODIMP PresShell::PageMove(PRBool aForward, PRBool aExtend) { return ScrollPage(aForward); #if 0 nsCOMPtr viewManager; nsresult result = GetViewManager(getter_AddRefs(viewManager)); if (NS_SUCCEEDED(result) && viewManager) { nsIScrollableView *scrollView; result = viewManager->GetRootScrollableView(&scrollView); if (NS_SUCCEEDED(result) && scrollView) { } } return result; #endif //0 } NS_IMETHODIMP PresShell::ScrollPage(PRBool aForward) { nsCOMPtr viewManager; nsresult result = GetViewManager(getter_AddRefs(viewManager)); if (NS_SUCCEEDED(result) && viewManager) { nsIScrollableView *scrollView; result = viewManager->GetRootScrollableView(&scrollView); if (NS_SUCCEEDED(result) && scrollView) { scrollView->ScrollByPages(aForward ? 1 : -1); } } return result; } NS_IMETHODIMP PresShell::ScrollLine(PRBool aForward) { nsCOMPtr viewManager; nsresult result = GetViewManager(getter_AddRefs(viewManager)); if (NS_SUCCEEDED(result) && viewManager) { nsIScrollableView *scrollView; result = viewManager->GetRootScrollableView(&scrollView); if (NS_SUCCEEDED(result) && scrollView) { scrollView->ScrollByLines(aForward ? 1 : -1); //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(); nsIView* rootView = nsnull; if (NS_OK == viewManager->GetRootView(rootView) && nsnull != rootView) { nsCOMPtr rootWidget; if (NS_OK == rootView->GetWidget(*getter_AddRefs(rootWidget)) && rootWidget!= nsnull) { rootWidget->Update(); } } } } return result; } NS_IMETHODIMP PresShell::ScrollHorizontal(PRBool aLeft) { return NS_ERROR_NOT_IMPLEMENTED; } NS_IMETHODIMP PresShell::CompleteScroll(PRBool aForward) { nsCOMPtr viewManager; nsresult result = GetViewManager(getter_AddRefs(viewManager)); if (NS_SUCCEEDED(result) && viewManager) { nsIScrollableView *scrollView; result = viewManager->GetRootScrollableView(&scrollView); if (NS_SUCCEEDED(result) && scrollView) { scrollView->ScrollByWhole(!aForward);//TRUE = top, aForward TRUE=bottom } } return result; } NS_IMETHODIMP PresShell::CompleteMove(PRBool aForward, PRBool aExtend) { return CompleteScroll(aForward); } NS_IMETHODIMP PresShell::SelectAll() { return mSelection->SelectAll(); } //end implementations nsISelectionController NS_IMETHODIMP PresShell::StyleChangeReflow() { EnterReflowLock(); nsIFrame* rootFrame; mFrameManager->GetRootFrame(&rootFrame); if (rootFrame) { // Kick off a top-down reflow NS_FRAME_LOG(NS_FRAME_TRACE_CALLS, ("enter nsPresShell::StyleChangeReflow")); #ifdef NS_DEBUG if (nsIFrameDebug::GetVerifyTreeEnable()) { nsIFrameDebug* frameDebug; if (NS_SUCCEEDED(rootFrame->QueryInterface(nsIFrameDebug::GetIID(), (void**)&frameDebug))) { frameDebug->VerifyTree(); } } #endif nsRect bounds; mPresContext->GetVisibleArea(bounds); nsSize maxSize(bounds.width, bounds.height); nsHTMLReflowMetrics desiredSize(nsnull); nsReflowStatus status; nsIRenderingContext* rcx = nsnull; CreateRenderingContext(rootFrame, &rcx); // XXX We should be using eReflowReason_StyleChange nsHTMLReflowState reflowState(mPresContext, rootFrame, eReflowReason_Resize, rcx, maxSize); nsIView* view; rootFrame->WillReflow(mPresContext); rootFrame->GetView(mPresContext, &view); if (view) { nsContainerFrame::PositionFrameView(mPresContext, rootFrame, view); } rootFrame->Reflow(mPresContext, desiredSize, reflowState, status); rootFrame->SizeTo(mPresContext, desiredSize.width, desiredSize.height); mPresContext->SetVisibleArea(nsRect(0,0,desiredSize.width,desiredSize.height)); if (view) { nsContainerFrame::SyncFrameViewAfterReflow(mPresContext, rootFrame, view, nsnull); } rootFrame->DidReflow(mPresContext, NS_FRAME_REFLOW_FINISHED); #ifdef NS_DEBUG if (nsIFrameDebug::GetVerifyTreeEnable()) { nsIFrameDebug* frameDebug; if (NS_SUCCEEDED(rootFrame->QueryInterface(nsIFrameDebug::GetIID(), (void**)&frameDebug))) { frameDebug->VerifyTree(); } } #endif VERIFY_STYLE_TREE; NS_IF_RELEASE(rcx); NS_FRAME_LOG(NS_FRAME_TRACE_CALLS, ("exit nsPresShell::StyleChangeReflow")); } ExitReflowLock(PR_TRUE, !gDoAsyncReflow); return NS_OK; //XXX this needs to be real. MMP } NS_IMETHODIMP PresShell::GetRootFrame(nsIFrame** aResult) const { return mFrameManager->GetRootFrame(aResult); } NS_IMETHODIMP PresShell::GetPageSequenceFrame(nsIPageSequenceFrame** aResult) const { NS_PRECONDITION(nsnull != aResult, "null ptr"); if (nsnull == aResult) { return NS_ERROR_NULL_POINTER; } nsIFrame* rootFrame; nsIFrame* child; nsIPageSequenceFrame* pageSequence = nsnull; // The page sequence frame is the child of the rootFrame mFrameManager->GetRootFrame(&rootFrame); rootFrame->FirstChild(nsnull, &child); if (nsnull != child) { // but the child could be wrapped in a scrollframe so lets check nsIScrollableFrame* scrollable = nsnull; nsresult rv = child->QueryInterface(kIScrollableFrameIID, (void **)&scrollable); if (NS_SUCCEEDED(rv) && (nsnull != scrollable)) { // if it is then get the scrolled frame scrollable->GetScrolledFrame(nsnull, child); } // make sure the child is a pageSequence rv = child->QueryInterface(kIPageSequenceFrameIID, (void**)&pageSequence); NS_ASSERTION(NS_SUCCEEDED(rv),"Error: Could not find pageSequence!"); *aResult = pageSequence; return NS_OK; } *aResult = nsnull; return NS_ERROR_FAILURE; } NS_IMETHODIMP PresShell::BeginUpdate(nsIDocument *aDocument) { mUpdateCount++; return NS_OK; } NS_IMETHODIMP PresShell::EndUpdate(nsIDocument *aDocument) { NS_PRECONDITION(0 != mUpdateCount, "too many EndUpdate's"); if (--mUpdateCount == 0) { // XXX do something here } return NS_OK; } NS_IMETHODIMP PresShell::BeginLoad(nsIDocument *aDocument) { #ifdef MOZ_PERF_METRICS // Reset style resolution stopwatch maintained by style set nsresult rv = NS_OK; nsCOMPtr watch = do_QueryInterface(mStyleSet, &rv); if (NS_SUCCEEDED(rv) && watch) { MOZ_TIMER_DEBUGLOG(("Reset: Style Resolution: PresShell::BeginLoad(), this=%p\n", this)); watch->ResetTimer(NS_TIMER_STYLE_RESOLUTION); } #endif return NS_OK; } NS_IMETHODIMP PresShell::EndLoad(nsIDocument *aDocument) { #ifdef DEBUG_nisheeth if (aDocument) { nsIURI* uri = nsnull; if ((uri = aDocument->GetDocumentURL())) { char* spec = nsnull; if (NS_SUCCEEDED(uri->GetSpec(&spec))) { printf("**** Url: '%s', Reflows: %d, Discarded Reflows: %d\n", spec, mReflows, mDiscardedReflowCommands); Recycle(spec); } } NS_RELEASE(uri); } #endif #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 nsresult rv = NS_OK; nsCOMPtr watch = do_QueryInterface(mStyleSet, &rv); if (NS_SUCCEEDED(rv) && watch) { MOZ_TIMER_DEBUGLOG(("Stop: Style Resolution: PresShell::EndLoad(), this=%p\n", this)); watch->StopTimer(NS_TIMER_STYLE_RESOLUTION); MOZ_TIMER_LOG(("Style resolution time (this=%p): ", this)); watch->PrintTimer(NS_TIMER_STYLE_RESOLUTION); } #endif return NS_OK; } NS_IMETHODIMP PresShell::BeginReflow(nsIDocument *aDocument, nsIPresShell* aShell) { return NS_OK; } NS_IMETHODIMP PresShell::EndReflow(nsIDocument *aDocument, nsIPresShell* aShell) { return NS_OK; } // aReflowCommand is considered to be already in the queue if the // frame it targets is targeted by a pre-existing reflow command in // the queue. PRBool PresShell::AlreadyInQueue(nsIReflowCommand* aReflowCommand) { PRInt32 i, n = mReflowCommands.Count(); nsIFrame* targetFrame; PRBool inQueue = PR_FALSE; if (!gDoAsyncReflow) return PR_FALSE; if (NS_SUCCEEDED(aReflowCommand->GetTarget(targetFrame))) { // Iterate over the reflow commands and compare the targeted frames. for (i = 0; i < n; i++) { nsIReflowCommand* rc = (nsIReflowCommand*) mReflowCommands.ElementAt(i); if (rc) { nsIFrame* targetOfQueuedRC; if (NS_SUCCEEDED(rc->GetTarget(targetOfQueuedRC))) { nsIReflowCommand::ReflowType RCType; nsIReflowCommand::ReflowType queuedRCType; aReflowCommand->GetType(RCType); rc->GetType(queuedRCType); if (targetFrame == targetOfQueuedRC && RCType == queuedRCType) { #ifdef DEBUG_nisheeth mDiscardedReflowCommands++; #endif #ifdef DEBUG if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) { printf("*** PresShell::AlreadyInQueue(): Discarding reflow command: this=%p\n", this); aReflowCommand->List(stdout); } #endif inQueue = PR_TRUE; break; } } } } } return inQueue; } NS_IMETHODIMP PresShell::AppendReflowCommand(nsIReflowCommand* aReflowCommand) { #ifdef DEBUG if (mInVerifyReflow) { return NS_OK; } if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) { printf("\nPresShell@%p: adding reflow command\n", this); aReflowCommand->List(stdout); if (VERIFY_REFLOW_REALLY_NOISY_RC & gVerifyReflowFlags) { printf("Current content model:\n"); nsCOMPtr rootContent; rootContent = getter_AddRefs(mDocument->GetRootContent()); if (rootContent) { rootContent->List(stdout, 0); } } } #endif nsresult rv = NS_OK; if (!AlreadyInQueue(aReflowCommand)) { NS_ADDREF(aReflowCommand); rv = (mReflowCommands.AppendElement(aReflowCommand) ? NS_OK : NS_ERROR_OUT_OF_MEMORY); } return rv; } NS_IMETHODIMP PresShell::CancelReflowCommand(nsIFrame* aTargetFrame) { PRInt32 i, n = mReflowCommands.Count(); for (i = 0; i < n; i++) { nsIReflowCommand* rc = (nsIReflowCommand*) mReflowCommands.ElementAt(i); if (rc) { nsIFrame* target; if (NS_SUCCEEDED(rc->GetTarget(target))) { if (target == aTargetFrame) { #ifdef DEBUG if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) { printf("PresShell: removing rc=%p for frame ", rc); nsFrame::ListTag(stdout, aTargetFrame); printf("\n"); } #endif mReflowCommands.RemoveElementAt(i); NS_RELEASE(rc); n--; i--; continue; } } } } return NS_OK; } //-------------- Begin Reflow Event Definition ------------------------ struct ReflowEvent : public PLEvent { ReflowEvent(nsIPresShell* aPresShell, nsIEventQueue* aQueue); ~ReflowEvent() { } void HandleEvent() { nsCOMPtr presShell = do_QueryReferent(mPresShell); if (presShell) { #ifdef DEBUG if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) { printf("\n*** Handling reflow event: PresShell=%p, event=%p\n", presShell, this); } #endif presShell->SetReflowEventStatus(PR_FALSE); presShell->EnterReflowLock(); presShell->ProcessReflowCommands(); presShell->ExitReflowLock(PR_FALSE, PR_TRUE); } else mPresShell = 0; } nsWeakPtr mPresShell; }; static void PR_CALLBACK HandlePLEvent(ReflowEvent* aEvent) { aEvent->HandleEvent(); } static void PR_CALLBACK DestroyPLEvent(ReflowEvent* aEvent) { delete aEvent; } ReflowEvent::ReflowEvent(nsIPresShell* aPresShell, nsIEventQueue* aQueue) { NS_ASSERTION(aPresShell && aQueue, "Null parameters!"); mPresShell = getter_AddRefs(NS_GetWeakReference(aPresShell)); PL_InitEvent(this, nsnull, (PLHandleEventProc) ::HandlePLEvent, (PLDestroyEventProc) ::DestroyPLEvent); aQueue->PostEvent(this); } //-------------- End Reflow Event Definition --------------------------- void PresShell::PostReflowEvent() { if (!mPendingReflowEvent && mReflowCommands.Count() > 0) { ReflowEvent* ev; ev = new ReflowEvent((nsIPresShell*) this, mEventQueue); #ifdef DEBUG if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) { printf("\n*** PresShell::PostReflowEvent(), this=%p, event=%p\n", this, ev); } #endif mPendingReflowEvent = PR_TRUE; } } NS_IMETHODIMP PresShell::ProcessReflowCommands() { MOZ_TIMER_DEBUGLOG(("Start: Reflow: PresShell::ProcessReflowCommands(), this=%p\n", this)); MOZ_TIMER_START(mReflowWatch); PRTime beforeReflow, afterReflow; PRInt64 diff; if (0 != mReflowCommands.Count()) { nsHTMLReflowMetrics desiredSize(nsnull); nsIRenderingContext* rcx; nsIFrame* rootFrame; #ifdef DEBUG_nisheeth mReflows++; #endif mFrameManager->GetRootFrame(&rootFrame); CreateRenderingContext(rootFrame, &rcx); #ifdef DEBUG if (GetVerifyReflowEnable()) { if (VERIFY_REFLOW_ALL & gVerifyReflowFlags) { printf("ProcessReflowCommands: begin incremental reflow\n"); } } if (VERIFY_REFLOW_DUMP_COMMANDS & gVerifyReflowFlags) { PRInt32 i, n = mReflowCommands.Count(); printf("\nPresShell::ProcessReflowCommands: this=%p, count=%d\n", this, n); for (i = 0; i < n; i++) { nsIReflowCommand* rc = (nsIReflowCommand*) mReflowCommands.ElementAt(i); rc->List(stdout); } } #endif while (0 != mReflowCommands.Count()) { // Use RemoveElementAt in case the reflowcommand dispatches a // new one during its execution. nsIReflowCommand* rc = (nsIReflowCommand*) mReflowCommands.ElementAt(0); mReflowCommands.RemoveElementAt(0); // Dispatch the reflow command nsSize maxSize; rootFrame->GetSize(maxSize); if (gDoAsyncReflow) beforeReflow = PR_Now(); rc->Dispatch(mPresContext, desiredSize, maxSize, *rcx); if (gDoAsyncReflow) afterReflow = PR_Now(); NS_RELEASE(rc); VERIFY_STYLE_TREE; if (gDoAsyncReflow) { // Enable after fixing the Mac build // LL_SUB(diff, afterReflow, beforeReflow); // LL_ADD(mAccumulatedReflowTime, mAccumulatedReflowTime, diff); // if (LL_CMP(mAccumulatedReflowTime, >, gMaxRCProcessingTime)) break; } } NS_IF_RELEASE(rcx); if (gDoAsyncReflow) { if (mReflowCommands.Count() > 0) { // Reflow Commands are still queued up. // Schedule a reflow event to handle them asynchronously. PostReflowEvent(); } #ifdef DEBUG if (VERIFY_REFLOW_DUMP_COMMANDS & gVerifyReflowFlags) { PRInt32 reflowTime; // Enable after fixing the Mac build // LL_L2I(reflowTime, mAccumulatedReflowTime); printf("Time spent in PresShell::ProcessReflowCommands(), this=%p, time=%d micro seconds\n", this, reflowTime); } #endif mAccumulatedReflowTime = 0; } #ifdef DEBUG if (VERIFY_REFLOW_DUMP_COMMANDS & gVerifyReflowFlags) { printf("\nPresShell::ProcessReflowCommands() finished: this=%p\n", this); } if (nsIFrameDebug::GetVerifyTreeEnable()) { nsIFrameDebug* frameDebug; if (NS_SUCCEEDED(rootFrame->QueryInterface(nsIFrameDebug::GetIID(), (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); mInVerifyReflow = PR_TRUE; PRBool ok = VerifyIncrementalReflow(); mInVerifyReflow = PR_FALSE; if (VERIFY_REFLOW_ALL & gVerifyReflowFlags) { printf("ProcessReflowCommands: finished (%s)\n", ok ? "ok" : "failed"); } if (0 != mReflowCommands.Count()) { printf("XXX yikes! reflow commands queued during verify-reflow\n"); } } #endif } MOZ_TIMER_DEBUGLOG(("Stop: Reflow: PresShell::ProcessReflowCommands(), this=%p\n", this)); MOZ_TIMER_STOP(mReflowWatch); return NS_OK; } NS_IMETHODIMP PresShell::ClearFrameRefs(nsIFrame* aFrame) { nsIEventStateManager *manager; if (NS_OK == mPresContext->GetEventStateManager(&manager)) { manager->ClearFrameRefs(aFrame); NS_RELEASE(manager); } if (mCaret) { mCaret->ClearFrameRefs(aFrame); } if (aFrame == mCurrentEventFrame) { mCurrentEventFrame->GetContent(&mCurrentEventContent); mCurrentEventFrame = nsnull; } for (int i=0; iGetView(mPresContext, &view); if (nsnull == view) aFrame->GetOffsetFromView(mPresContext, pt, &view); while (nsnull != view) { view->GetWidget(widget); if (nsnull != widget) { NS_RELEASE(widget); break; } view->GetParent(view); } nsCOMPtr dx; nsIRenderingContext* result = nsnull; rv = mPresContext->GetDeviceContext(getter_AddRefs(dx)); if (NS_SUCCEEDED(rv) && dx) { if (nsnull != view) { rv = dx->CreateRenderingContext(view, result); } else { rv = dx->CreateRenderingContext(result); } } *aResult = result; return rv; } NS_IMETHODIMP PresShell::CantRenderReplacedElement(nsIPresContext* aPresContext, nsIFrame* aFrame) { if (mFrameManager) { return mFrameManager->CantRenderReplacedElement(aPresContext, aFrame); } return NS_OK; } NS_IMETHODIMP PresShell::GoToAnchor(const nsString& aAnchorName) const { nsCOMPtr htmlDoc; nsCOMPtr xmlDoc; nsresult rv = NS_OK; nsCOMPtr content; if (NS_SUCCEEDED(mDocument->QueryInterface(kIDOMHTMLDocumentIID, getter_AddRefs(htmlDoc)))) { nsCOMPtr element; // Find the element with the specified id rv = htmlDoc->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 rv = element->QueryInterface(kIContentIID, getter_AddRefs(content)); } } else if (NS_SUCCEEDED(mDocument->QueryInterface(kIXMLDocumentIID, getter_AddRefs(xmlDoc)))) { rv = xmlDoc->GetContentById(aAnchorName, getter_AddRefs(content)); } if (NS_SUCCEEDED(rv) && content) { nsIFrame* frame; // Get the primary frame if (NS_SUCCEEDED(GetPrimaryFrameFor(content, &frame))) { rv = ScrollFrameIntoView(frame, NS_PRESSHELL_SCROLL_TOP, NS_PRESSHELL_SCROLL_ANYWHERE); } } else { rv = NS_ERROR_FAILURE; } return rv; } NS_IMETHODIMP PresShell::ScrollFrameIntoView(nsIFrame *aFrame, PRIntn aVPercent, PRIntn aHPercent) const { nsresult rv = NS_OK; if (!aFrame) { return NS_ERROR_NULL_POINTER; } if (mViewManager) { // Get the viewport scroller nsIScrollableView* scrollingView; mViewManager->GetRootScrollableView(&scrollingView); if (scrollingView) { nsIView* scrolledView; nsPoint offset; nsIView* closestView; // Determine the offset from aFrame to the scrolled view. We do that by // getting the offset from its closest view and then walking up scrollingView->GetScrolledView(scrolledView); aFrame->GetOffsetFromView(mPresContext, offset, &closestView); // XXX Deal with the case where there is a scrolled element, e.g., a // DIV in the middle... while ((closestView != nsnull) && (closestView != scrolledView)) { nscoord x, y; // Update the offset closestView->GetPosition(&x, &y); offset.MoveBy(x, y); // Get its parent view closestView->GetParent(closestView); } // Determine the visible rect in the scrolled view's coordinate space. // The size of the visible area is the clip view size const nsIView* clipView; nsRect visibleRect; scrollingView->GetScrollPosition(visibleRect.x, visibleRect.y); scrollingView->GetClipView(&clipView); clipView->GetDimensions(&visibleRect.width, &visibleRect.height); // The actual scroll offsets nscoord scrollOffsetX = visibleRect.x; nscoord scrollOffsetY = visibleRect.y; // The frame's bounds in the coordinate space of the scrolled frame nsRect frameBounds; aFrame->GetRect(frameBounds); frameBounds.x = offset.x; frameBounds.y = offset.y; // See how the frame should be positioned vertically if (NS_PRESSHELL_SCROLL_ANYWHERE == aVPercent) { // The caller doesn't care where the frame is positioned vertically, // so long as it's fully visible if (frameBounds.y < visibleRect.y) { // Scroll up so the frame's top edge is visible scrollOffsetY = frameBounds.y; } else if (frameBounds.YMost() > visibleRect.YMost()) { // Scroll down so the frame's bottom edge is visible. Make sure the // frame's top edge is still visible scrollOffsetY += frameBounds.YMost() - visibleRect.YMost(); if (scrollOffsetY > frameBounds.y) { scrollOffsetY = frameBounds.y; } } } else { // Align the frame edge according to the specified percentage nscoord frameAlignY = frameBounds.y + (frameBounds.height * aVPercent) / 100; scrollOffsetY = frameAlignY - (visibleRect.height * aVPercent) / 100; } // See how the frame should be positioned horizontally if (NS_PRESSHELL_SCROLL_ANYWHERE == aHPercent) { // The caller doesn't care where the frame is positioned horizontally, // so long as it's fully visible if (frameBounds.x < visibleRect.x) { // Scroll left so the frame's left edge is visible scrollOffsetX = frameBounds.x; } else if (frameBounds.XMost() > visibleRect.XMost()) { // Scroll right so the frame's right edge is visible. Make sure the // frame's left edge is still visible scrollOffsetX += frameBounds.XMost() - visibleRect.XMost(); if (scrollOffsetX > frameBounds.x) { scrollOffsetX = frameBounds.x; } } } else { // Align the frame edge according to the specified percentage nscoord frameAlignX = frameBounds.x + (frameBounds.width * aHPercent) / 100; scrollOffsetX = frameAlignX - (visibleRect.width * aHPercent) / 100; } scrollingView->ScrollTo(scrollOffsetX, scrollOffsetY, NS_VMREFRESH_IMMEDIATE); } } return rv; } NS_IMETHODIMP PresShell::DoCopy() { nsCOMPtr doc; GetDocument(getter_AddRefs(doc)); if (doc) { nsString buffer; nsresult rv; nsIDOMSelection* sel; GetSelection(SELECTION_NORMAL, &sel); if (sel != nsnull) doc->CreateXIF(buffer,sel); NS_IF_RELEASE(sel); // Get the Clipboard NS_WITH_SERVICE(nsIClipboard, clipboard, kCClipboardCID, &rv); if (NS_FAILED(rv)) return rv; if ( clipboard ) { // Create a transferable for putting data on the Clipboard nsCOMPtr trans; rv = nsComponentManager::CreateInstance(kCTransferableCID, nsnull, nsITransferable::GetIID(), (void**) getter_AddRefs(trans)); if ( trans ) { // The data on the clipboard will be in "XIF" format // so give the clipboard transferable a "XIFConverter" for // converting from XIF to other formats nsCOMPtr xifConverter; rv = nsComponentManager::CreateInstance(kCXIFConverterCID, nsnull, NS_GET_IID(nsIFormatConverter), getter_AddRefs(xifConverter)); if ( xifConverter ) { // Add the XIF DataFlavor to the transferable // this tells the transferable that it can handle receiving the XIF format trans->AddDataFlavor(kXIFMime); // Add the converter for going from XIF to other formats trans->SetConverter(xifConverter); // Now add the XIF data to the transferable, placing it into a nsISupportsWString object. // the transferable wants the number bytes for the data and since it is double byte // we multiply by 2. nsCOMPtr dataWrapper; rv = nsComponentManager::CreateInstance(NS_SUPPORTS_WSTRING_PROGID, nsnull, NS_GET_IID(nsISupportsWString), getter_AddRefs(dataWrapper)); if ( dataWrapper ) { dataWrapper->SetData ( NS_CONST_CAST(PRUnichar*,buffer.GetUnicode()) ); // QI the data object an |nsISupports| so that when the transferable holds // onto it, it will addref the correct interface. nsCOMPtr genericDataObj ( do_QueryInterface(dataWrapper) ); trans->SetTransferData(kXIFMime, genericDataObj, buffer.Length()*2); } // put the transferable on the clipboard clipboard->SetData(trans, nsnull); } } } } return NS_OK; } // XXX This function needs to be renamed to something better. // It is not simply a getter for the layout history state. It // creates a new state object and captures frame state onto it. NS_IMETHODIMP PresShell::GetHistoryState(nsILayoutHistoryState** aState) { nsresult rv = NS_OK; NS_PRECONDITION(nsnull != aState, "null state pointer"); // Create the document state object rv = NS_NewLayoutHistoryState(aState); if (NS_FAILED(rv)) { *aState = nsnull; return rv; } // Capture frame state for the entire frame hierarchy nsIFrame* rootFrame = nsnull; rv = GetRootFrame(&rootFrame); if (NS_FAILED(rv) || nsnull == rootFrame) return rv; rv = mFrameManager->CaptureFrameState(mPresContext, rootFrame, *aState); return rv; } NS_IMETHODIMP PresShell::SetHistoryState(nsILayoutHistoryState* aLayoutHistoryState) { mHistoryState = aLayoutHistoryState; return NS_OK; } NS_IMETHODIMP PresShell::GetReflowEventStatus(PRBool* aPending) { if (aPending) *aPending = mPendingReflowEvent; return NS_OK; } NS_IMETHODIMP PresShell::SetReflowEventStatus(PRBool aPending) { mPendingReflowEvent = aPending; return NS_OK; } NS_IMETHODIMP PresShell::ContentChanged(nsIDocument *aDocument, nsIContent* aContent, nsISupports* aSubContent) { EnterReflowLock(); nsresult rv = mStyleSet->ContentChanged(mPresContext, aContent, aSubContent); VERIFY_STYLE_TREE; ExitReflowLock(PR_TRUE, !gDoAsyncReflow); return rv; } NS_IMETHODIMP PresShell::ContentStatesChanged(nsIDocument* aDocument, nsIContent* aContent1, nsIContent* aContent2) { EnterReflowLock(); nsresult rv = mStyleSet->ContentStatesChanged(mPresContext, aContent1, aContent2); VERIFY_STYLE_TREE; ExitReflowLock(PR_TRUE, !gDoAsyncReflow); return rv; } NS_IMETHODIMP PresShell::AttributeChanged(nsIDocument *aDocument, nsIContent* aContent, PRInt32 aNameSpaceID, nsIAtom* aAttribute, PRInt32 aHint) { EnterReflowLock(); nsresult rv = mStyleSet->AttributeChanged(mPresContext, aContent, aNameSpaceID, aAttribute, aHint); VERIFY_STYLE_TREE; ExitReflowLock(PR_TRUE, !gDoAsyncReflow); return rv; } NS_IMETHODIMP PresShell::ContentAppended(nsIDocument *aDocument, nsIContent* aContainer, PRInt32 aNewIndexInContainer) { EnterReflowLock(); MOZ_TIMER_DEBUGLOG(("Start: Frame Creation: PresShell::ContentAppended(), this=%p\n", this)); MOZ_TIMER_START(mFrameCreationWatch); nsresult rv = mStyleSet->ContentAppended(mPresContext, aContainer, aNewIndexInContainer); VERIFY_STYLE_TREE; if (NS_SUCCEEDED(rv) && nsnull != mHistoryState) { // If history state has been set by session history, ask the frame manager // to restore frame state for the frame hierarchy created for the chunk of // content that just came in. nsIFrame* frame; rv = GetPrimaryFrameFor(aContainer, &frame); if (NS_SUCCEEDED(rv) && nsnull != frame) mFrameManager->RestoreFrameState(mPresContext, frame, mHistoryState); } MOZ_TIMER_DEBUGLOG(("Stop: Frame Creation: PresShell::ContentAppended(), this=%p\n", this)); MOZ_TIMER_STOP(mFrameCreationWatch); ExitReflowLock(PR_TRUE, !gDoAsyncReflow); return rv; } NS_IMETHODIMP PresShell::ContentInserted(nsIDocument* aDocument, nsIContent* aContainer, nsIContent* aChild, PRInt32 aIndexInContainer) { EnterReflowLock(); nsresult rv = mStyleSet->ContentInserted(mPresContext, aContainer, aChild, aIndexInContainer); VERIFY_STYLE_TREE; ExitReflowLock(PR_TRUE, !gDoAsyncReflow); return rv; } NS_IMETHODIMP PresShell::ContentReplaced(nsIDocument* aDocument, nsIContent* aContainer, nsIContent* aOldChild, nsIContent* aNewChild, PRInt32 aIndexInContainer) { EnterReflowLock(); nsresult rv = mStyleSet->ContentReplaced(mPresContext, aContainer, aOldChild, aNewChild, aIndexInContainer); VERIFY_STYLE_TREE; ExitReflowLock(PR_TRUE, PR_TRUE); return rv; } NS_IMETHODIMP PresShell::ContentRemoved(nsIDocument *aDocument, nsIContent* aContainer, nsIContent* aChild, PRInt32 aIndexInContainer) { EnterReflowLock(); nsresult rv = mStyleSet->ContentRemoved(mPresContext, aContainer, aChild, aIndexInContainer); VERIFY_STYLE_TREE; ExitReflowLock(PR_TRUE, PR_TRUE); return rv; } nsresult PresShell::ReconstructFrames(void) { nsresult rv = NS_OK; EnterReflowLock(); rv = mStyleSet->ReconstructDocElementHierarchy(mPresContext); VERIFY_STYLE_TREE; ExitReflowLock(PR_TRUE, PR_TRUE); return rv; } NS_IMETHODIMP PresShell::StyleSheetAdded(nsIDocument *aDocument, nsIStyleSheet* aStyleSheet) { return ReconstructFrames(); } NS_IMETHODIMP PresShell::StyleSheetRemoved(nsIDocument *aDocument, nsIStyleSheet* aStyleSheet) { return ReconstructFrames(); } NS_IMETHODIMP PresShell::StyleSheetDisabledStateChanged(nsIDocument *aDocument, nsIStyleSheet* aStyleSheet, PRBool aDisabled) { return ReconstructFrames(); } NS_IMETHODIMP PresShell::StyleRuleChanged(nsIDocument *aDocument, nsIStyleSheet* aStyleSheet, nsIStyleRule* aStyleRule, PRInt32 aHint) { EnterReflowLock(); nsresult rv = mStyleSet->StyleRuleChanged(mPresContext, aStyleSheet, aStyleRule, aHint); VERIFY_STYLE_TREE; ExitReflowLock(PR_TRUE, PR_TRUE); return rv; } NS_IMETHODIMP PresShell::StyleRuleAdded(nsIDocument *aDocument, nsIStyleSheet* aStyleSheet, nsIStyleRule* aStyleRule) { EnterReflowLock(); nsresult rv = mStyleSet->StyleRuleAdded(mPresContext, aStyleSheet, aStyleRule); VERIFY_STYLE_TREE; ExitReflowLock(PR_TRUE, PR_TRUE); if (NS_FAILED(rv)) { return rv; } // XXX For now reconstruct everything return ReconstructFrames(); } NS_IMETHODIMP PresShell::StyleRuleRemoved(nsIDocument *aDocument, nsIStyleSheet* aStyleSheet, nsIStyleRule* aStyleRule) { EnterReflowLock(); nsresult rv = mStyleSet->StyleRuleRemoved(mPresContext, aStyleSheet, aStyleRule); VERIFY_STYLE_TREE; ExitReflowLock(PR_TRUE, PR_TRUE); if (NS_FAILED(rv)) { return rv; } // XXX For now reconstruct everything return ReconstructFrames(); } NS_IMETHODIMP PresShell::DocumentWillBeDestroyed(nsIDocument *aDocument) { return NS_OK; } NS_IMETHODIMP PresShell::GetPrimaryFrameFor(nsIContent* aContent, nsIFrame** aResult) const { nsresult rv; if (mFrameManager) { rv = mFrameManager->GetPrimaryFrameFor(aContent, aResult); } else { *aResult = nsnull; rv = NS_OK; } return rv; } NS_IMETHODIMP PresShell::GetStyleContextFor(nsIFrame* aFrame, nsIStyleContext** aStyleContext) const { if (!aFrame || !aStyleContext) { return NS_ERROR_NULL_POINTER; } return (aFrame->GetStyleContext(aStyleContext)); } NS_IMETHODIMP PresShell::GetLayoutObjectFor(nsIContent* aContent, nsISupports** aResult) const { nsresult result = NS_ERROR_NULL_POINTER; if ((nsnull!=aResult) && (nsnull!=aContent)) { *aResult = nsnull; nsIFrame *primaryFrame=nsnull; result = GetPrimaryFrameFor(aContent, &primaryFrame); if ((NS_SUCCEEDED(result)) && (nsnull!=primaryFrame)) { result = primaryFrame->QueryInterface(kISupportsIID, (void**)aResult); } } return result; } NS_IMETHODIMP PresShell::GetPlaceholderFrameFor(nsIFrame* aFrame, nsIFrame** aResult) const { nsresult rv; if (mFrameManager) { rv = mFrameManager->GetPlaceholderFrameFor(aFrame, aResult); } else { *aResult = nsnull; rv = NS_OK; } return rv; } //nsIViewObserver NS_IMETHODIMP PresShell::Paint(nsIView *aView, nsIRenderingContext& aRenderingContext, const nsRect& aDirtyRect) { void* clientData; nsIFrame* frame; nsresult rv = NS_OK; NS_ASSERTION(!(nsnull == aView), "null view"); aView->GetClientData(clientData); frame = (nsIFrame *)clientData; if (nsnull != frame) { StCaretHider caretHider(this); // stack-based class hides caret until dtor. rv = frame->Paint(mPresContext, aRenderingContext, aDirtyRect, NS_FRAME_PAINT_LAYER_BACKGROUND); rv = frame->Paint(mPresContext, aRenderingContext, aDirtyRect, NS_FRAME_PAINT_LAYER_FLOATERS); rv = frame->Paint(mPresContext, aRenderingContext, aDirtyRect, NS_FRAME_PAINT_LAYER_FOREGROUND); #ifdef NS_DEBUG // Draw a border around the frame if (nsIFrameDebug::GetShowFrameBorders()) { nsRect r; frame->GetRect(r); aRenderingContext.SetColor(NS_RGB(0,0,255)); aRenderingContext.DrawRect(0, 0, r.width, r.height); } #endif } 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. nsCOMPtr doc; nsresult result = mCurrentEventContent->GetDocument(*getter_AddRefs(doc)); if (NS_SUCCEEDED(result) && doc) { GetPrimaryFrameFor(mCurrentEventContent, &mCurrentEventFrame); } } return mCurrentEventFrame; } void PresShell::PushCurrentEventFrame() { if (mCurrentEventFrame) { mCurrentEventFrameStack.InsertElementAt((void*)mCurrentEventFrame, 0); } } void PresShell::PopCurrentEventFrame() { mCurrentEventFrame = nsnull; if (0 != mCurrentEventFrameStack.Count()) { mCurrentEventFrame = (nsIFrame*)mCurrentEventFrameStack.ElementAt(0); mCurrentEventFrameStack.RemoveElementAt(0); } } NS_IMETHODIMP PresShell::HandleEvent(nsIView *aView, nsGUIEvent* aEvent, nsEventStatus* aEventStatus) { void* clientData; nsIFrame* frame; nsresult rv = NS_OK; NS_ASSERTION(!(nsnull == aView), "null view"); if (mIsDestroying || mReflowLockCount > 0) { return NS_OK; } aView->GetClientData(clientData); frame = (nsIFrame *)clientData; /* if (mSelection && aEvent->eventStructType == NS_KEY_EVENT) {//KEY HANDLERS WILL GET RID OF THIS if (mDisplayNonTextSelection && NS_SUCCEEDED(mSelection->HandleKeyEvent(mPresContext, aEvent))) { return NS_OK; } } */ if (nsnull != frame) { PushCurrentEventFrame(); nsIEventStateManager *manager; nsIContent* focusContent = nsnull; if (NS_OK == mPresContext->GetEventStateManager(&manager)) { if (NS_IS_KEY_EVENT(aEvent)) { //Key events go to the focused frame, not point based. manager->GetFocusedContent(&focusContent); if (focusContent) GetPrimaryFrameFor(focusContent, &mCurrentEventFrame); else frame->GetFrameForPoint(mPresContext, aEvent->point, &mCurrentEventFrame); } else { frame->GetFrameForPoint(mPresContext, aEvent->point, &mCurrentEventFrame); } NS_IF_RELEASE(mCurrentEventContent); if (GetCurrentEventFrame() || focusContent) { //Once we have the targetFrame, handle the event in this order //1. Give event to event manager for pre event state changes and generation of synthetic events. rv = manager->PreHandleEvent(mPresContext, aEvent, mCurrentEventFrame, aEventStatus, aView); //2. Give event to the DOM for third party and JS use. if ((GetCurrentEventFrame() || focusContent) && NS_OK == rv) { if (focusContent) { rv = focusContent->HandleDOMEvent(mPresContext, (nsEvent*)aEvent, nsnull, NS_EVENT_FLAG_INIT, aEventStatus); } else { nsIContent* targetContent; if (NS_OK == mCurrentEventFrame->GetContent(&targetContent) && nsnull != targetContent) { rv = targetContent->HandleDOMEvent(mPresContext, (nsEvent*)aEvent, nsnull, NS_EVENT_FLAG_INIT, aEventStatus); NS_RELEASE(targetContent); } } //3. Give event to the Frames for browser default processing. // XXX The event isn't translated into the local coordinate space // of the frame... if (GetCurrentEventFrame() && NS_OK == rv) { rv = mCurrentEventFrame->HandleEvent(mPresContext, aEvent, aEventStatus); } //4. Give event to event manager for post event state changes and generation of synthetic events. if ((GetCurrentEventFrame() || focusContent) && NS_OK == rv) { rv = manager->PostHandleEvent(mPresContext, aEvent, mCurrentEventFrame, aEventStatus, aView); } } } NS_RELEASE(manager); NS_IF_RELEASE(focusContent); } PopCurrentEventFrame(); } else { rv = NS_OK; } return rv; } NS_IMETHODIMP PresShell::Scrolled(nsIView *aView) { void* clientData; nsIFrame* frame; nsresult rv; NS_ASSERTION(!(nsnull == aView), "null view"); aView->GetClientData(clientData); frame = (nsIFrame *)clientData; if (nsnull != frame) rv = frame->Scrolled(aView); else rv = NS_OK; return rv; } NS_IMETHODIMP PresShell::ResizeReflow(nsIView *aView, nscoord aWidth, nscoord aHeight) { return ResizeReflow(aWidth, aHeight); } #ifdef NS_DEBUG #include "nsViewsCID.h" #include "nsWidgetsCID.h" #include "nsIScrollableView.h" #include "nsIDeviceContext.h" #include "nsIURL.h" #include "nsILinkHandler.h" static NS_DEFINE_IID(kViewManagerCID, NS_VIEW_MANAGER_CID); static NS_DEFINE_IID(kIViewManagerIID, NS_IVIEWMANAGER_IID); static NS_DEFINE_IID(kScrollingViewCID, NS_SCROLLING_VIEW_CID); static NS_DEFINE_IID(kIViewIID, NS_IVIEW_IID); static NS_DEFINE_IID(kScrollViewIID, NS_ISCROLLABLEVIEW_IID); static NS_DEFINE_IID(kWidgetCID, NS_CHILD_CID); static NS_DEFINE_IID(kILinkHandlerIID, NS_ILINKHANDLER_IID); static void LogVerifyMessage(nsIFrame* k1, nsIFrame* k2, const char* aMsg) { printf("verifyreflow: "); nsAutoString name; if (nsnull != k1) { nsIFrameDebug* frameDebug; if (NS_SUCCEEDED(k1->QueryInterface(nsIFrameDebug::GetIID(), (void**)&frameDebug))) { frameDebug->GetFrameName(name); } } else { name = "(null)"; } fputs(name, stdout); printf(" != "); if (nsnull != k2) { nsIFrameDebug* frameDebug; if (NS_SUCCEEDED(k2->QueryInterface(nsIFrameDebug::GetIID(), (void**)&frameDebug))) { frameDebug->GetFrameName(name); } } else { name = "(null)"; } fputs(name, stdout); printf(" %s", aMsg); } static void LogVerifyMessage(nsIFrame* k1, nsIFrame* k2, const char* aMsg, const nsRect& r1, const nsRect& r2) { printf("verifyreflow: "); nsAutoString name; nsIFrameDebug* frameDebug; if (NS_SUCCEEDED(k1->QueryInterface(nsIFrameDebug::GetIID(), (void**)&frameDebug))) { frameDebug->GetFrameName(name); fputs(name, stdout); } printf("{%d, %d, %d, %d}", r1.x, r1.y, r1.width, r1.height); printf(" != "); if (NS_SUCCEEDED(k2->QueryInterface(nsIFrameDebug::GetIID(), (void**)&frameDebug))) { frameDebug->GetFrameName(name); fputs(name, stdout); } printf("{%d, %d, %d, %d}", r2.x, r2.y, r2.width, r2.height); printf(" %s\n", aMsg); } static PRBool CompareTrees(nsIPresContext* aPresContext, nsIFrame* aA, nsIFrame* aB) { PRBool ok = PR_TRUE; nsIAtom* listName = nsnull; PRInt32 listIndex = 0; do { nsIFrame* k1, *k2; aA->FirstChild(listName, &k1); aB->FirstChild(listName, &k2); 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; nsIWidget* w1, *w2; 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 k1->GetRect(r1); k2->GetRect(r2); if (r1 != r2) { ok = PR_FALSE; LogVerifyMessage(k1, k2, "(frame rects)", r1, r2); } // 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. k1->GetView(aPresContext, &v1); k2->GetView(aPresContext, &v2); 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) { v1->GetBounds(r1); v2->GetBounds(r2); if (r1 != r2) { LogVerifyMessage(k1, k2, "(view rects)", r1, r2); } v1->GetWidget(w1); v2->GetWidget(w2); 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; } // Compare the sub-trees too if (!CompareTrees(aPresContext, k1, k2)) { ok = PR_FALSE; if (0 == (VERIFY_REFLOW_ALL & gVerifyReflowFlags)) { break; } } // Advance to next sibling k1->GetNextSibling(&k1); k2->GetNextSibling(&k2); } else { break; } } if (!ok && (0 == (VERIFY_REFLOW_ALL & gVerifyReflowFlags))) { break; } NS_IF_RELEASE(listName); nsIAtom* listName1; nsIAtom* listName2; aA->GetAdditionalChildListName(listIndex, &listName1); aB->GetAdditionalChildListName(listIndex, &listName2); 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(tmp, stdout); } else fputs("(null)", stdout); printf(" != "); if (nsnull != listName2) { listName2->ToString(tmp); fputs(tmp, stdout); } else fputs("(null)", stdout); printf("\n"); NS_IF_RELEASE(listName1); NS_IF_RELEASE(listName2); break; } NS_IF_RELEASE(listName2); listName = listName1; } while (ok && (listName != nsnull)); return ok; } #endif #if 0 static nsIFrame* FindTopFrame(nsIFrame* aRoot) { if (nsnull != aRoot) { nsIContent* content; aRoot->GetContent(&content); if (nsnull != content) { nsIAtom* tag; content->GetTag(tag); if (nsnull != tag) { NS_RELEASE(tag); NS_RELEASE(content); return aRoot; } NS_RELEASE(content); } // Try one of the children nsIFrame* kid; aRoot->FirstChild(nsnull, &kid); while (nsnull != kid) { nsIFrame* result = FindTopFrame(kid); if (nsnull != result) { return result; } kid->GetNextSibling(&kid); } } return nsnull; } #endif nsresult PresShell::CloneStyleSet(nsIStyleSet* aSet, nsIStyleSet** aResult) { nsIStyleSet* clone; nsresult rv = NS_NewStyleSet(&clone); if (NS_FAILED(rv)) { return rv; } PRInt32 i, n; n = aSet->GetNumberOfOverrideStyleSheets(); for (i = 0; i < n; i++) { nsIStyleSheet* ss; ss = aSet->GetOverrideStyleSheetAt(i); if (nsnull != ss) { clone->AppendOverrideStyleSheet(ss); NS_RELEASE(ss); } } n = aSet->GetNumberOfDocStyleSheets(); for (i = 0; i < n; i++) { nsIStyleSheet* ss; ss = aSet->GetDocStyleSheetAt(i); if (nsnull != ss) { clone->AddDocStyleSheet(ss, mDocument); NS_RELEASE(ss); } } n = aSet->GetNumberOfBackstopStyleSheets(); for (i = 0; i < n; i++) { nsIStyleSheet* ss; ss = aSet->GetBackstopStyleSheetAt(i); if (nsnull != ss) { clone->AppendBackstopStyleSheet(ss); NS_RELEASE(ss); } } *aResult = clone; return NS_OK; } #ifdef DEBUG // After an incremental reflow, we verify the correctness by doing a // full reflow into a fresh frame tree. PRBool PresShell::VerifyIncrementalReflow() { // All the stuff we are creating that needs releasing nsIPresContext* cx; nsIViewManager* vm; nsIPresShell* sh; // Create a presentation context to view the new frame tree nsresult rv; PRBool isPaginated = PR_FALSE; mPresContext->IsPaginated(&isPaginated); if (isPaginated) { rv = NS_NewPrintPreviewContext(&cx); } else { rv = NS_NewGalleyContext(&cx); } #if 1 nsISupports* container; if (NS_SUCCEEDED(mPresContext->GetContainer(&container)) && (nsnull != container)) { cx->SetContainer(container); nsILinkHandler* lh; if (NS_SUCCEEDED(container->QueryInterface(kILinkHandlerIID, (void**)&lh))) { cx->SetLinkHandler(lh); NS_RELEASE(lh); } NS_RELEASE(container); } #endif NS_ASSERTION(NS_OK == rv, "failed to create presentation context"); nsCOMPtr dc; mPresContext->GetDeviceContext(getter_AddRefs(dc)); nsCOMPtr prefs; mPresContext->GetPrefs(getter_AddRefs(prefs)); cx->Init(dc, prefs); // Get our scrolling preference nsScrollPreference scrolling; nsIView* rootView; mViewManager->GetRootView(rootView); nsIScrollableView* scrollView; rv = rootView->QueryInterface(kScrollViewIID, (void**)&scrollView); if (NS_OK == rv) { scrollView->GetScrollPreference(scrolling); } nsIWidget* rootWidget; rootView->GetWidget(rootWidget); void* nativeParentWidget = rootWidget->GetNativeData(NS_NATIVE_WIDGET); // Create a new view manager. rv = nsComponentManager::CreateInstance(kViewManagerCID, nsnull, kIViewManagerIID, (void**) &vm); if (NS_FAILED(rv)) { NS_ASSERTION(NS_OK == rv, "failed to create view manager"); } rv = vm->Init(dc); if (NS_FAILED(rv)) { NS_ASSERTION(NS_OK == rv, "failed to init view manager"); } // Create a child window of the parent that is our "root view/window" // Create a view nsRect tbounds; mPresContext->GetVisibleArea(tbounds); nsIView* view; rv = nsComponentManager::CreateInstance(kViewCID, nsnull, kIViewIID, (void **) &view); if (NS_FAILED(rv)) { NS_ASSERTION(NS_OK == rv, "failed to create scroll view"); } rv = view->Init(vm, tbounds, nsnull); if (NS_FAILED(rv)) { NS_ASSERTION(NS_OK == rv, "failed to init scroll view"); } //now create the widget for the view rv = view->CreateWidget(kWidgetCID, nsnull, nativeParentWidget); if (NS_OK != rv) { NS_ASSERTION(NS_OK == rv, "failed to create scroll view widget"); } // 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(r); cx->SetVisibleArea(r); // Create a new presentation shell to view the document. Use the // exact same style information that this document has. nsCOMPtr newSet; rv = CloneStyleSet(mStyleSet, getter_AddRefs(newSet)); NS_ASSERTION(NS_SUCCEEDED(rv), "failed to clone style set"); rv = mDocument->CreateShell(cx, vm, newSet, &sh); NS_ASSERTION(NS_OK == rv, "failed to create presentation shell"); vm->SetViewObserver((nsIViewObserver *)((PresShell*)sh)); sh->InitialReflow(r.width, r.height); // Now that the document has been reflowed, use its frame tree to // compare against our frame tree. nsIFrame* root1; GetRootFrame(&root1); nsIFrame* root2; sh->GetRootFrame(&root2); #if 0 root1 = FindTopFrame(root1); root2 = FindTopFrame(root2); #endif PRBool ok = CompareTrees(mPresContext, root1, root2); if (!ok && (VERIFY_REFLOW_NOISY & gVerifyReflowFlags)) { printf("Verify reflow failed, primary tree:\n"); nsIFrameDebug* frameDebug; if (NS_SUCCEEDED(root1->QueryInterface(nsIFrameDebug::GetIID(), (void**)&frameDebug))) { frameDebug->List(mPresContext, stdout, 0); } printf("Verification tree:\n"); if (NS_SUCCEEDED(root2->QueryInterface(nsIFrameDebug::GetIID(), (void**)&frameDebug))) { frameDebug->List(mPresContext, stdout, 0); } } // printf("Incremental reflow doomed view tree:\n"); // view->List(stdout, 1); // view->SetVisibility(nsViewVisibility_kHide); cx->Stop(); cx->SetContainer(nsnull); NS_RELEASE(cx); sh->EndObservingDocument(); NS_RELEASE(sh); NS_RELEASE(vm); return ok; } #endif // PresShellViewEventListener NS_IMPL_ISUPPORTS2(PresShellViewEventListener, nsIScrollPositionListener, nsICompositeListener) PresShellViewEventListener::PresShellViewEventListener() { NS_INIT_ISUPPORTS(); mPresShell = 0; mWasVisible = PR_FALSE; mCallCount = 0; } PresShellViewEventListener::~PresShellViewEventListener() { mPresShell = 0; } nsresult PresShellViewEventListener::SetPresShell(nsIPresShell *aPresShell) { mPresShell = aPresShell; return NS_OK; } nsresult PresShellViewEventListener::HideCaret() { nsresult result = NS_OK; if (mPresShell && 0 == mCallCount) { result = mPresShell->GetCaretEnabled(&mWasVisible); if (NS_SUCCEEDED(result) && mWasVisible) result = mPresShell->SetCaretEnabled(PR_FALSE); } ++mCallCount; return result; } nsresult PresShellViewEventListener::RestoreCaretVisibility() { nsresult result = NS_OK; --mCallCount; if (mPresShell && 0 == mCallCount && mWasVisible) result = mPresShell->SetCaretEnabled(PR_TRUE); return result; } NS_IMETHODIMP PresShellViewEventListener::ScrollPositionWillChange(nsIScrollableView *aView, nscoord aX, nscoord aY) { return HideCaret(); } NS_IMETHODIMP PresShellViewEventListener::ScrollPositionDidChange(nsIScrollableView *aView, nscoord aX, nscoord aY) { return RestoreCaretVisibility(); } NS_IMETHODIMP PresShellViewEventListener::WillRefreshRegion(nsIViewManager *aViewManager, nsIView *aView, nsIRenderingContext *aContext, nsIRegion *aRegion, PRUint32 aUpdateFlags) { return HideCaret(); } NS_IMETHODIMP PresShellViewEventListener::DidRefreshRegion(nsIViewManager *aViewManager, nsIView *aView, nsIRenderingContext *aContext, nsIRegion *aRegion, PRUint32 aUpdateFlags) { return RestoreCaretVisibility(); } NS_IMETHODIMP PresShellViewEventListener::WillRefreshRect(nsIViewManager *aViewManager, nsIView *aView, nsIRenderingContext *aContext, const nsRect *aRect, PRUint32 aUpdateFlags) { return HideCaret(); } NS_IMETHODIMP PresShellViewEventListener::DidRefreshRect(nsIViewManager *aViewManager, nsIView *aView, nsIRenderingContext *aContext, const nsRect *aRect, PRUint32 aUpdateFlags) { return RestoreCaretVisibility(); }