/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- * vim: set ts=2 sw=2 et tw=78: * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. * * 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 */ #ifndef nsPresShell_h_ #define nsPresShell_h_ #include "nsIPresShell.h" #include "nsStubDocumentObserver.h" #include "nsISelectionController.h" #include "nsIObserver.h" #include "nsWeakReference.h" #include "nsCRT.h" #include "nsAutoPtr.h" #include "nsIWidget.h" #include "nsStyleSet.h" #include "nsPresArena.h" #include "nsFrameSelection.h" #include "nsGUIEvent.h" #include "nsContentUtils.h" #include "nsRefreshDriver.h" #include "mozilla/Attributes.h" class nsRange; class nsIDragService; class nsCSSStyleSheet; struct RangePaintInfo; struct nsCallbackEventRequest; #ifdef MOZ_REFLOW_PERF class ReflowCountMgr; #endif class nsPresShellEventCB; class nsAutoCauseReflowNotifier; // 250ms. This is actually pref-controlled, but we use this value if we fail // to get the pref for any reason. #define PAINTLOCK_EVENT_DELAY 250 class PresShell : public nsIPresShell, public nsStubDocumentObserver, public nsISelectionController, public nsIObserver, public nsSupportsWeakReference { public: PresShell(); NS_DECL_AND_IMPL_ZEROING_OPERATOR_NEW // nsISupports NS_DECL_ISUPPORTS // nsIPresShell virtual NS_HIDDEN_(nsresult) Init(nsIDocument* aDocument, nsPresContext* aPresContext, nsIViewManager* aViewManager, nsStyleSet* aStyleSet, nsCompatibility aCompatMode); virtual NS_HIDDEN_(void) Destroy(); virtual NS_HIDDEN_(nsresult) SetPreferenceStyleRules(bool aForceReflow); NS_IMETHOD GetSelection(SelectionType aType, nsISelection** aSelection); virtual nsISelection* GetCurrentSelection(SelectionType aType); NS_IMETHOD SetDisplaySelection(int16_t aToggle); NS_IMETHOD GetDisplaySelection(int16_t *aToggle); NS_IMETHOD ScrollSelectionIntoView(SelectionType aType, SelectionRegion aRegion, int16_t aFlags); NS_IMETHOD RepaintSelection(SelectionType aType); virtual NS_HIDDEN_(void) BeginObservingDocument(); virtual NS_HIDDEN_(void) EndObservingDocument(); virtual NS_HIDDEN_(nsresult) InitialReflow(nscoord aWidth, nscoord aHeight); virtual NS_HIDDEN_(nsresult) ResizeReflow(nscoord aWidth, nscoord aHeight); virtual NS_HIDDEN_(nsresult) ResizeReflowOverride(nscoord aWidth, nscoord aHeight); virtual NS_HIDDEN_(void) StyleChangeReflow(); virtual NS_HIDDEN_(nsIPageSequenceFrame*) GetPageSequenceFrame() const; virtual NS_HIDDEN_(nsIFrame*) GetRealPrimaryFrameFor(nsIContent* aContent) const; virtual NS_HIDDEN_(nsIFrame*) GetPlaceholderFrameFor(nsIFrame* aFrame) const; virtual NS_HIDDEN_(void) FrameNeedsReflow(nsIFrame *aFrame, IntrinsicDirty aIntrinsicDirty, nsFrameState aBitToAdd); virtual NS_HIDDEN_(void) FrameNeedsToContinueReflow(nsIFrame *aFrame); virtual NS_HIDDEN_(void) CancelAllPendingReflows(); virtual NS_HIDDEN_(bool) IsSafeToFlush() const; virtual NS_HIDDEN_(void) FlushPendingNotifications(mozFlushType aType); /** * Recreates the frames for a node */ virtual NS_HIDDEN_(nsresult) RecreateFramesFor(nsIContent* aContent); /** * Post a callback that should be handled after reflow has finished. */ virtual NS_HIDDEN_(nsresult) PostReflowCallback(nsIReflowCallback* aCallback); virtual NS_HIDDEN_(void) CancelReflowCallback(nsIReflowCallback* aCallback); virtual NS_HIDDEN_(void) ClearFrameRefs(nsIFrame* aFrame); virtual NS_HIDDEN_(already_AddRefed) GetReferenceRenderingContext(); virtual NS_HIDDEN_(nsresult) GoToAnchor(const nsAString& aAnchorName, bool aScroll); virtual NS_HIDDEN_(nsresult) ScrollToAnchor(); virtual NS_HIDDEN_(nsresult) ScrollContentIntoView(nsIContent* aContent, ScrollAxis aVertical, ScrollAxis aHorizontal, uint32_t aFlags); virtual bool ScrollFrameRectIntoView(nsIFrame* aFrame, const nsRect& aRect, ScrollAxis aVertical, ScrollAxis aHorizontal, uint32_t aFlags); virtual nsRectVisibility GetRectVisibility(nsIFrame *aFrame, const nsRect &aRect, nscoord aMinTwips) const; virtual NS_HIDDEN_(void) SetIgnoreFrameDestruction(bool aIgnore); virtual NS_HIDDEN_(void) NotifyDestroyingFrame(nsIFrame* aFrame); virtual NS_HIDDEN_(nsresult) CaptureHistoryState(nsILayoutHistoryState** aLayoutHistoryState, bool aLeavingPage); virtual NS_HIDDEN_(void) UnsuppressPainting(); virtual nsresult GetAgentStyleSheets(nsCOMArray& aSheets); virtual nsresult SetAgentStyleSheets(const nsCOMArray& aSheets); virtual nsresult AddOverrideStyleSheet(nsIStyleSheet *aSheet); virtual nsresult RemoveOverrideStyleSheet(nsIStyleSheet *aSheet); virtual NS_HIDDEN_(nsresult) HandleEventWithTarget(nsEvent* aEvent, nsIFrame* aFrame, nsIContent* aContent, nsEventStatus* aStatus); virtual NS_HIDDEN_(nsIFrame*) GetEventTargetFrame(); virtual NS_HIDDEN_(already_AddRefed) GetEventTargetContent(nsEvent* aEvent); virtual nsresult ReconstructFrames(void); virtual void Freeze(); virtual void Thaw(); virtual void FireOrClearDelayedEvents(bool aFireEvents); virtual nsIFrame* GetFrameForPoint(nsIFrame* aFrame, nsPoint aPt); virtual NS_HIDDEN_(nsresult) RenderDocument(const nsRect& aRect, uint32_t aFlags, nscolor aBackgroundColor, gfxContext* aThebesContext); virtual already_AddRefed RenderNode(nsIDOMNode* aNode, nsIntRegion* aRegion, nsIntPoint& aPoint, nsIntRect* aScreenRect); virtual already_AddRefed RenderSelection(nsISelection* aSelection, nsIntPoint& aPoint, nsIntRect* aScreenRect); virtual already_AddRefed GetRootWindow(); virtual LayerManager* GetLayerManager(); virtual void SetIgnoreViewportScrolling(bool aIgnore); virtual void SetDisplayPort(const nsRect& aDisplayPort); virtual nsresult SetResolution(float aXResolution, float aYResolution); //nsIViewObserver interface virtual void Paint(nsIView* aViewToPaint, const nsRegion& aDirtyRegion, PaintType aType, bool aWillSendDidPaint); virtual nsresult HandleEvent(nsIFrame* aFrame, nsGUIEvent* aEvent, bool aDontRetargetEvents, nsEventStatus* aEventStatus); virtual NS_HIDDEN_(nsresult) HandleDOMEventWithTarget(nsIContent* aTargetContent, nsEvent* aEvent, nsEventStatus* aStatus); virtual NS_HIDDEN_(nsresult) HandleDOMEventWithTarget(nsIContent* aTargetContent, nsIDOMEvent* aEvent, nsEventStatus* aStatus); virtual bool ShouldIgnoreInvalidation(); virtual void WillPaint(bool aWillSendDidPaint); virtual void DidPaint(); virtual void ScheduleViewManagerFlush(); virtual void DispatchSynthMouseMove(nsGUIEvent *aEvent, bool aFlushOnHoverChange); virtual void ClearMouseCaptureOnView(nsIView* aView); virtual bool IsVisible(); // caret handling virtual NS_HIDDEN_(already_AddRefed) GetCaret() const; virtual NS_HIDDEN_(void) MaybeInvalidateCaretPosition(); NS_IMETHOD SetCaretEnabled(bool aInEnable); NS_IMETHOD SetCaretReadOnly(bool aReadOnly); NS_IMETHOD GetCaretEnabled(bool *aOutEnabled); NS_IMETHOD SetCaretVisibilityDuringSelection(bool aVisibility); NS_IMETHOD GetCaretVisible(bool *_retval); virtual void SetCaret(nsCaret *aNewCaret); virtual void RestoreCaret(); NS_IMETHOD SetSelectionFlags(int16_t aInEnable); NS_IMETHOD GetSelectionFlags(int16_t *aOutEnable); // nsISelectionController NS_IMETHOD CharacterMove(bool aForward, bool aExtend); NS_IMETHOD CharacterExtendForDelete(); NS_IMETHOD CharacterExtendForBackspace(); NS_IMETHOD WordMove(bool aForward, bool aExtend); NS_IMETHOD WordExtendForDelete(bool aForward); NS_IMETHOD LineMove(bool aForward, bool aExtend); NS_IMETHOD IntraLineMove(bool aForward, bool aExtend); NS_IMETHOD PageMove(bool aForward, bool aExtend); NS_IMETHOD ScrollPage(bool aForward); NS_IMETHOD ScrollLine(bool aForward); NS_IMETHOD ScrollCharacter(bool aRight); NS_IMETHOD CompleteScroll(bool aForward); NS_IMETHOD CompleteMove(bool aForward, bool aExtend); NS_IMETHOD SelectAll(); NS_IMETHOD CheckVisibility(nsIDOMNode *node, int16_t startOffset, int16_t EndOffset, bool *_retval); virtual nsresult CheckVisibilityContent(nsIContent* aNode, int16_t aStartOffset, int16_t aEndOffset, bool* aRetval); // nsIDocumentObserver NS_DECL_NSIDOCUMENTOBSERVER_BEGINUPDATE NS_DECL_NSIDOCUMENTOBSERVER_ENDUPDATE NS_DECL_NSIDOCUMENTOBSERVER_BEGINLOAD NS_DECL_NSIDOCUMENTOBSERVER_ENDLOAD NS_DECL_NSIDOCUMENTOBSERVER_CONTENTSTATECHANGED NS_DECL_NSIDOCUMENTOBSERVER_DOCUMENTSTATESCHANGED NS_DECL_NSIDOCUMENTOBSERVER_STYLESHEETADDED NS_DECL_NSIDOCUMENTOBSERVER_STYLESHEETREMOVED NS_DECL_NSIDOCUMENTOBSERVER_STYLESHEETAPPLICABLESTATECHANGED NS_DECL_NSIDOCUMENTOBSERVER_STYLERULECHANGED NS_DECL_NSIDOCUMENTOBSERVER_STYLERULEADDED NS_DECL_NSIDOCUMENTOBSERVER_STYLERULEREMOVED // nsIMutationObserver NS_DECL_NSIMUTATIONOBSERVER_CHARACTERDATACHANGED NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTEWILLCHANGE NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED NS_DECL_NSIOBSERVER #ifdef MOZ_REFLOW_PERF virtual NS_HIDDEN_(void) DumpReflows(); virtual NS_HIDDEN_(void) CountReflows(const char * aName, nsIFrame * aFrame); virtual NS_HIDDEN_(void) PaintCount(const char * aName, nsRenderingContext* aRenderingContext, nsPresContext* aPresContext, nsIFrame * aFrame, const nsPoint& aOffset, uint32_t aColor); virtual NS_HIDDEN_(void) SetPaintFrameCount(bool aOn); virtual bool IsPaintingFrameCounts(); #endif #ifdef DEBUG virtual void ListStyleContexts(nsIFrame *aRootFrame, FILE *out, int32_t aIndent = 0); virtual void ListStyleSheets(FILE *out, int32_t aIndent = 0); virtual void VerifyStyleTree(); #endif #ifdef PR_LOGGING static PRLogModuleInfo* gLog; #endif virtual NS_HIDDEN_(void) DisableNonTestMouseEvents(bool aDisable); virtual void UpdateCanvasBackground(); virtual nsresult AddCanvasBackgroundColorItem(nsDisplayListBuilder& aBuilder, nsDisplayList& aList, nsIFrame* aFrame, const nsRect& aBounds, nscolor aBackstopColor, uint32_t aFlags); virtual nsresult AddPrintPreviewBackgroundItem(nsDisplayListBuilder& aBuilder, nsDisplayList& aList, nsIFrame* aFrame, const nsRect& aBounds); virtual nscolor ComputeBackstopColor(nsIView* aDisplayRoot); virtual NS_HIDDEN_(nsresult) SetIsActive(bool aIsActive); virtual bool GetIsViewportOverridden() { return mViewportOverridden; } virtual bool IsLayoutFlushObserver() { return GetPresContext()->RefreshDriver()-> IsLayoutFlushObserver(this); } void SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf, nsArenaMemoryStats *aArenaObjectsSize, size_t *aPresShellSize, size_t *aStyleSetsSize, size_t *aTextRunsSize, size_t *aPresContextSize); size_t SizeOfTextRuns(nsMallocSizeOfFun aMallocSizeOf) const; // This data is stored as a content property (nsGkAtoms::scrolling) on // mContentToScrollTo when we have a pending ScrollIntoView. struct ScrollIntoViewData { ScrollAxis mContentScrollVAxis; ScrollAxis mContentScrollHAxis; uint32_t mContentToScrollToFlags; }; protected: virtual ~PresShell(); void HandlePostedReflowCallbacks(bool aInterruptible); void CancelPostedReflowCallbacks(); void UnsuppressAndInvalidate(); void WillCauseReflow() { nsContentUtils::AddScriptBlocker(); ++mChangeNestCount; } nsresult DidCauseReflow(); friend class nsAutoCauseReflowNotifier; bool TouchesAreEqual(nsIDOMTouch *aTouch1, nsIDOMTouch *aTouch2); void DispatchTouchEvent(nsEvent *aEvent, nsEventStatus* aStatus, nsPresShellEventCB* aEventCB, bool aTouchIsNew); void WillDoReflow(); void DidDoReflow(bool aInterruptible); // ProcessReflowCommands returns whether we processed all our dirty roots // without interruptions. bool ProcessReflowCommands(bool aInterruptible); // MaybeScheduleReflow checks if posting a reflow is needed, then checks if // the last reflow was interrupted. In the interrupted case ScheduleReflow is // called off a timer, otherwise it is called directly. void MaybeScheduleReflow(); // Actually schedules a reflow. This should only be called by // MaybeScheduleReflow and the reflow timer ScheduleReflowOffTimer // sets up. void ScheduleReflow(); // Reflow regardless of whether the override bit has been set. nsresult ResizeReflowIgnoreOverride(nscoord aWidth, nscoord aHeight); // DoReflow returns whether the reflow finished without interruption bool DoReflow(nsIFrame* aFrame, bool aInterruptible); #ifdef DEBUG void DoVerifyReflow(); void VerifyHasDirtyRootAncestor(nsIFrame* aFrame); #endif // Helper for ScrollContentIntoView void DoScrollContentIntoView(); /** * Initialize cached font inflation preference values. * * @see nsLayoutUtils::sFontSizeInflationEmPerLine * @see nsLayoutUtils::sFontSizeInflationMinTwips * @see nsLayoutUtils::sFontSizeInflationLineThreshold */ void SetupFontInflation(); friend struct AutoRenderingStateSaveRestore; friend struct RenderingState; struct RenderingState { RenderingState(PresShell* aPresShell) : mXResolution(aPresShell->mXResolution) , mYResolution(aPresShell->mYResolution) , mRenderFlags(aPresShell->mRenderFlags) { } float mXResolution; float mYResolution; RenderFlags mRenderFlags; }; struct AutoSaveRestoreRenderingState { AutoSaveRestoreRenderingState(PresShell* aPresShell) : mPresShell(aPresShell) , mOldState(aPresShell) {} ~AutoSaveRestoreRenderingState() { mPresShell->mRenderFlags = mOldState.mRenderFlags; mPresShell->mXResolution = mOldState.mXResolution; mPresShell->mYResolution = mOldState.mYResolution; } PresShell* mPresShell; RenderingState mOldState; }; static RenderFlags ChangeFlag(RenderFlags aFlags, bool aOnOff, eRenderFlag aFlag) { return aOnOff ? (aFlags | aFlag) : (aFlag & ~aFlag); } void SetRenderingState(const RenderingState& aState); friend class nsPresShellEventCB; bool mCaretEnabled; #ifdef DEBUG nsStyleSet* CloneStyleSet(nsStyleSet* aSet); bool VerifyIncrementalReflow(); bool 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, nsRange* 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, bool aForPrimarySelection); /* * 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, nsIntRegion* aRegion, nsRect aArea, nsIntPoint& aPoint, nsIntRect* 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(); void MaybeReleaseCapturingContent() { nsRefPtr frameSelection = FrameSelection(); if (frameSelection) { frameSelection->SetMouseDownState(false); } if (gCaptureInfo.mContent && gCaptureInfo.mContent->OwnerDoc() == mDocument) { SetCapturingContent(nullptr, 0); } } nsresult HandleRetargetedEvent(nsEvent* aEvent, nsEventStatus* aStatus, nsIContent* aTarget) { PushCurrentEventInfo(nullptr, nullptr); mCurrentEventContent = aTarget; nsresult rv = NS_OK; if (GetCurrentEventFrame()) { rv = HandleEventInternal(aEvent, aStatus); } PopCurrentEventInfo(); return rv; } class nsDelayedEvent { public: virtual ~nsDelayedEvent() {}; virtual void Dispatch(PresShell* aShell) {} }; class nsDelayedInputEvent : public nsDelayedEvent { public: virtual void Dispatch(PresShell* aShell) { if (mEvent && mEvent->widget) { nsCOMPtr w = mEvent->widget; nsEventStatus status; w->DispatchEvent(mEvent, status); } } protected: void Init(nsInputEvent* aEvent) { mEvent->time = aEvent->time; mEvent->refPoint = aEvent->refPoint; mEvent->modifiers = aEvent->modifiers; } nsDelayedInputEvent() : nsDelayedEvent(), mEvent(nullptr) {} nsInputEvent* mEvent; }; class nsDelayedMouseEvent : public nsDelayedInputEvent { public: nsDelayedMouseEvent(nsMouseEvent* aEvent) : nsDelayedInputEvent() { mEvent = new nsMouseEvent(NS_IS_TRUSTED_EVENT(aEvent), aEvent->message, aEvent->widget, aEvent->reason, aEvent->context); Init(aEvent); static_cast(mEvent)->clickCount = aEvent->clickCount; } virtual ~nsDelayedMouseEvent() { delete static_cast(mEvent); } }; class nsDelayedKeyEvent : public nsDelayedInputEvent { public: nsDelayedKeyEvent(nsKeyEvent* aEvent) : nsDelayedInputEvent() { mEvent = new nsKeyEvent(NS_IS_TRUSTED_EVENT(aEvent), aEvent->message, aEvent->widget); Init(aEvent); static_cast(mEvent)->keyCode = aEvent->keyCode; static_cast(mEvent)->charCode = aEvent->charCode; static_cast(mEvent)->alternativeCharCodes = aEvent->alternativeCharCodes; static_cast(mEvent)->isChar = aEvent->isChar; } virtual ~nsDelayedKeyEvent() { delete static_cast(mEvent); } }; // Check if aEvent is a mouse event and record the mouse location for later // synth mouse moves. void RecordMouseLocation(nsGUIEvent* aEvent); class nsSynthMouseMoveEvent MOZ_FINAL : public nsARefreshObserver { public: nsSynthMouseMoveEvent(PresShell* aPresShell, bool aFromScroll) : mPresShell(aPresShell), mFromScroll(aFromScroll) { NS_ASSERTION(mPresShell, "null parameter"); } ~nsSynthMouseMoveEvent() { Revoke(); } NS_INLINE_DECL_REFCOUNTING(nsSynthMouseMoveEvent) void Revoke() { if (mPresShell) { mPresShell->GetPresContext()->RefreshDriver()-> RemoveRefreshObserver(this, Flush_Display); mPresShell = nullptr; } } virtual void WillRefresh(mozilla::TimeStamp aTime) { if (mPresShell) mPresShell->ProcessSynthMouseMoveEvent(mFromScroll); } private: PresShell* mPresShell; bool mFromScroll; }; void ProcessSynthMouseMoveEvent(bool aFromScroll); void QueryIsActive(); nsresult UpdateImageLockingState(); #ifdef ANDROID nsIDocument* GetTouchEventTargetDocument(); #endif bool InZombieDocument(nsIContent *aContent); already_AddRefed GetParentPresShell(); nsIFrame* GetCurrentEventFrame(); nsresult RetargetEventToParent(nsGUIEvent* aEvent, nsEventStatus* aEventStatus); void PushCurrentEventInfo(nsIFrame* aFrame, nsIContent* aContent); void PopCurrentEventInfo(); nsresult HandleEventInternal(nsEvent* aEvent, nsEventStatus *aStatus); nsresult HandlePositionedEvent(nsIFrame* aTargetFrame, nsGUIEvent* aEvent, nsEventStatus* aEventStatus); // This returns the focused DOM window under our top level window. // I.e., when we are deactive, this returns the *last* focused DOM window. already_AddRefed GetFocusedDOMWindowInOurWindow(); /* * This and the next two helper methods are used to target and position the * context menu when the keyboard shortcut is used to open it. * * If another menu is open, the context menu is opened relative to the * active menuitem within the menu, or the menu itself if no item is active. * Otherwise, if the caret is visible, the menu is opened near the caret. * Otherwise, if a selectable list such as a listbox is focused, the * current item within the menu is opened relative to this item. * Otherwise, the context menu is opened at the topleft corner of the * view. * * Returns true if the context menu event should fire and false if it should * not. */ bool AdjustContextMenuKeyEvent(nsMouseEvent* aEvent); // bool PrepareToUseCaretPosition(nsIWidget* aEventWidget, nsIntPoint& aTargetPt); // Get the selected item and coordinates in device pixels relative to root // document's root view for element, first ensuring the element is onscreen void GetCurrentItemAndPositionForElement(nsIDOMElement *aCurrentEl, nsIContent **aTargetToUse, nsIntPoint& aTargetPt, nsIWidget *aRootWidget); void FireResizeEvent(); void FireBeforeResizeEvent(); static void AsyncResizeEventCallback(nsITimer* aTimer, void* aPresShell); virtual void SynthesizeMouseMove(bool aFromScroll); PresShell* GetRootPresShell(); nscolor GetDefaultBackgroundColorToDraw(); // The callback for the mPaintSuppressionTimer timer. static void sPaintSuppressionCallback(nsITimer* aTimer, void* aPresShell); // The callback for the mReflowContinueTimer timer. static void sReflowContinueCallback(nsITimer* aTimer, void* aPresShell); bool ScheduleReflowOffTimer(); // Widget notificiations virtual void WindowSizeMoveDone(); virtual void SysColorChanged() { mPresContext->SysColorChanged(); } virtual void ThemeChanged() { mPresContext->ThemeChanged(); } #ifdef DEBUG // The reflow root under which we're currently reflowing. Null when // not in reflow. nsIFrame* mCurrentReflowRoot; uint32_t mUpdateCount; #endif #ifdef MOZ_REFLOW_PERF ReflowCountMgr* mReflowCountMgr; #endif // This is used for synthetic mouse events that are sent when what is under // the mouse pointer may have changed without the mouse moving (eg scrolling, // change to the document contents). // It is set only on a presshell for a root document, this value represents // the last observed location of the mouse relative to that root document. It // is set to (NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE) if the mouse isn't // over our window or there is no last observed mouse location for some // reason. nsPoint mMouseLocation; // mStyleSet owns it but we maintain a ref, may be null nsRefPtr mPrefStyleSheet; // Set of frames that we should mark with NS_FRAME_HAS_DIRTY_CHILDREN after // we finish reflowing mCurrentReflowRoot. nsTHashtable > mFramesToDirty; // Reflow roots that need to be reflowed. nsTArray mDirtyRoots; nsTArray > mDelayedEvents; nsRevocableEventPtr > mResizeEvent; nsCOMPtr mAsyncResizeEventTimer; nsIFrame* mCurrentEventFrame; nsCOMPtr mCurrentEventContent; nsTArray mCurrentEventFrameStack; nsCOMArray mCurrentEventContentStack; nsRevocableEventPtr mSynthMouseMoveEvent; nsCOMPtr mLastAnchorScrolledTo; nsRefPtr mCaret; nsRefPtr mOriginalCaret; nsCallbackEventRequest* mFirstCallbackEventRequest; nsCallbackEventRequest* mLastCallbackEventRequest; // This timer controls painting suppression. Until it fires // or all frames are constructed, we won't paint anything but // our background and scrollbars. nsCOMPtr mPaintSuppressionTimer; // At least on Win32 and Mac after interupting a reflow we need to post // the resume reflow event off a timer to avoid event starvation because // posted messages are processed before other messages when the modal // moving/sizing loop is running, see bug 491700 for details. nsCOMPtr mReflowContinueTimer; // Information needed to properly handle scrolling content into view if the // pre-scroll reflow flush can be interrupted. mContentToScrollTo is // non-null between the initial scroll attempt and the first time we finish // processing all our dirty roots. mContentToScrollTo has a content property // storing the details for the scroll operation, see ScrollIntoViewData above. nsCOMPtr mContentToScrollTo; nscoord mLastAnchorScrollPositionY; // 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. uint16_t mChangeNestCount; bool mDocumentLoading : 1; bool mIgnoreFrameDestruction : 1; bool mHaveShutDown : 1; bool mViewportOverridden : 1; bool mLastRootReflowHadUnconstrainedHeight : 1; bool mNoDelayedMouseEvents : 1; bool mNoDelayedKeyEvents : 1; // We've been disconnected from the document. We will refuse to paint the // document until either our timer fires or all frames are constructed. bool mIsDocumentGone : 1; // Indicates that it is safe to unlock painting once all pending reflows // have been processed. bool mShouldUnsuppressPainting : 1; bool mAsyncResizeTimerIsActive : 1; bool mInResize : 1; static bool sDisableNonTestMouseEvents; }; #endif /* !defined(nsPresShell_h_) */