зеркало из https://github.com/mozilla/gecko-dev.git
3147 строки
122 KiB
C++
3147 строки
122 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* a presentation of a document, part 2 */
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#ifndef mozilla_PresShell_h
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#define mozilla_PresShell_h
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#include "mozilla/PresShellForwards.h"
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#include <stdio.h> // for FILE definition
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#include "FrameMetrics.h"
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#include "TouchManager.h"
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#include "Units.h"
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#include "Visibility.h"
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#include "mozilla/ArenaObjectID.h"
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#include "mozilla/Attributes.h"
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#include "mozilla/FlushType.h"
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#include "mozilla/MemoryReporting.h"
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#include "mozilla/ScrollTypes.h"
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#include "mozilla/StaticPtr.h"
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#include "mozilla/UniquePtr.h"
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#include "mozilla/WeakPtr.h"
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#include "mozilla/dom/DocumentBinding.h"
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#include "mozilla/layers/FocusTarget.h"
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#include "mozilla/layout/LayoutTelemetryTools.h"
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#include "mozilla/widget/ThemeChangeKind.h"
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#include "nsColor.h"
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#include "nsCOMArray.h"
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#include "nsCoord.h"
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#include "nsDOMNavigationTiming.h"
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#include "nsFrameManager.h"
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#include "nsFrameState.h"
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#include "nsIContent.h"
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#include "nsIObserver.h"
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#include "nsISelectionController.h"
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#include "nsQueryFrame.h"
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#include "nsPresArena.h"
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#include "nsPresContext.h"
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#include "nsRect.h"
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#include "nsRefreshObservers.h"
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#include "nsStringFwd.h"
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#include "nsStubDocumentObserver.h"
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#include "nsTHashSet.h"
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#include "nsThreadUtils.h"
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#include "nsWeakReference.h"
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class AutoPointerEventTargetUpdater;
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class AutoWeakFrame;
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class gfxContext;
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class MobileViewportManager;
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#ifdef ACCESSIBILITY
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class nsAccessibilityService;
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#endif
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class nsAutoCauseReflowNotifier;
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class nsCanvasFrame;
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class nsCaret;
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class nsCSSFrameConstructor;
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class nsDisplayList;
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class nsDisplayListBuilder;
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class nsDocShell;
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class nsFrameSelection;
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class nsIDocShell;
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class nsIFrame;
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class nsILayoutHistoryState;
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class nsINode;
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class nsPageSequenceFrame;
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class nsIReflowCallback;
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class nsIScrollableFrame;
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class nsITimer;
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class nsPIDOMWindowOuter;
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class nsPresShellEventCB;
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class nsRange;
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class nsRefreshDriver;
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class nsRegion;
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class nsView;
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class nsViewManager;
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class nsWindowSizes;
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struct RangePaintInfo;
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#ifdef MOZ_REFLOW_PERF
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class ReflowCountMgr;
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#endif
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class WeakFrame;
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class ZoomConstraintsClient;
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struct nsCallbackEventRequest;
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namespace mozilla {
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class AccessibleCaretEventHub;
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class EventStates;
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class GeckoMVMContext;
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class OverflowChangedTracker;
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class StyleSheet;
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class ProfileChunkedBuffer;
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#ifdef ACCESSIBILITY
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namespace a11y {
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class DocAccessible;
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} // namespace a11y
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#endif
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namespace dom {
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class BrowserParent;
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class Element;
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class Event;
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class HTMLSlotElement;
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class Selection;
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} // namespace dom
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namespace gfx {
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class SourceSurface;
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} // namespace gfx
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namespace layers {
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class LayerManager;
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struct LayersId;
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} // namespace layers
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namespace layout {
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class ScrollAnchorContainer;
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} // namespace layout
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// 039d8ffc-fa55-42d7-a53a-388cb129b052
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#define NS_PRESSHELL_IID \
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{ \
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0x039d8ffc, 0xfa55, 0x42d7, { \
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0xa5, 0x3a, 0x38, 0x8c, 0xb1, 0x29, 0xb0, 0x52 \
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} \
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}
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#undef NOISY_INTERRUPTIBLE_REFLOW
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/**
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* Presentation shell. Presentation shells are the controlling point for
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* managing the presentation of a document. The presentation shell holds a
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* live reference to the document, the presentation context, the style
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* manager, the style set and the root frame.
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*
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* When this object is Release'd, it will release the document, the
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* presentation context, the style manager, the style set and the root frame.
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*/
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class PresShell final : public nsStubDocumentObserver,
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public nsISelectionController,
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public nsIObserver,
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public nsSupportsWeakReference {
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typedef dom::Document Document;
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typedef dom::Element Element;
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typedef gfx::SourceSurface SourceSurface;
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typedef layers::FocusTarget FocusTarget;
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typedef layers::FrameMetrics FrameMetrics;
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typedef layers::LayerManager LayerManager;
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// A set type for tracking visible frames, for use by the visibility code in
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// PresShell. The set contains nsIFrame* pointers.
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typedef nsTHashSet<nsIFrame*> VisibleFrames;
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public:
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explicit PresShell(Document* aDocument);
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// nsISupports
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NS_DECL_ISUPPORTS
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NS_DECLARE_STATIC_IID_ACCESSOR(NS_PRESSHELL_IID)
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static bool AccessibleCaretEnabled(nsIDocShell* aDocShell);
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/**
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* Return the active content currently capturing the mouse if any.
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*/
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static nsIContent* GetCapturingContent() {
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return sCapturingContentInfo.mContent;
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}
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/**
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*/
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static dom::BrowserParent* GetCapturingRemoteTarget() {
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MOZ_ASSERT(XRE_IsParentProcess());
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return sCapturingContentInfo.mRemoteTarget;
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}
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/**
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* Allow or disallow mouse capturing.
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*/
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static void AllowMouseCapture(bool aAllowed) {
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sCapturingContentInfo.mAllowed = aAllowed;
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}
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/**
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* Returns true if there is an active mouse capture that wants to prevent
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* drags.
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*/
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static bool IsMouseCapturePreventingDrag() {
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return sCapturingContentInfo.mPreventDrag && sCapturingContentInfo.mContent;
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}
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static void ClearMouseCaptureOnView(nsView* aView);
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// If a frame in the subtree rooted at aFrame is capturing the mouse then
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// clears that capture.
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static void ClearMouseCapture(nsIFrame* aFrame);
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#ifdef ACCESSIBILITY
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/**
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* Return the document accessible for this PresShell if there is one.
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*/
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a11y::DocAccessible* GetDocAccessible() const { return mDocAccessible; }
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/**
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* Set the document accessible for this PresShell.
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*/
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void SetDocAccessible(a11y::DocAccessible* aDocAccessible) {
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mDocAccessible = aDocAccessible;
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}
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/**
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* Return true if accessibility is active.
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*/
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static bool IsAccessibilityActive();
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/**
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* Return accessibility service if accessibility is active.
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*/
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static nsAccessibilityService* GetAccessibilityService();
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#endif // #ifdef ACCESSIBILITY
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void Init(nsPresContext*, nsViewManager*);
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/**
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* All callers are responsible for calling |Destroy| after calling
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* |EndObservingDocument|. It needs to be separate only because form
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* controls incorrectly store their data in the frames rather than the
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* content model and printing calls |EndObservingDocument| multiple
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* times to make form controls behave nicely when printed.
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*/
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void Destroy();
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bool IsDestroying() { return mIsDestroying; }
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/**
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* All frames owned by the shell are allocated from an arena. They
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* are also recycled using free lists. Separate free lists are
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* maintained for each frame type (aID), which must always correspond
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* to the same aSize value. AllocateFrame is infallible and will abort
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* on out-of-memory.
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*/
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void* AllocateFrame(nsQueryFrame::FrameIID aID, size_t aSize) {
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#define FRAME_ID(classname, ...) \
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static_assert(size_t(nsQueryFrame::FrameIID::classname##_id) == \
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size_t(eArenaObjectID_##classname), \
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"");
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#define ABSTRACT_FRAME_ID(classname) \
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static_assert(size_t(nsQueryFrame::FrameIID::classname##_id) == \
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size_t(eArenaObjectID_##classname), \
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"");
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#include "mozilla/FrameIdList.h"
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#undef FRAME_ID
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#undef ABSTRACT_FRAME_ID
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return AllocateByObjectID(ArenaObjectID(size_t(aID)), aSize);
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}
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void FreeFrame(nsQueryFrame::FrameIID aID, void* aPtr) {
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return FreeByObjectID(ArenaObjectID(size_t(aID)), aPtr);
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}
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void* AllocateByObjectID(ArenaObjectID aID, size_t aSize) {
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void* result = mFrameArena.Allocate(aID, aSize);
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RecordAlloc(result);
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return result;
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}
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void FreeByObjectID(ArenaObjectID aID, void* aPtr) {
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RecordFree(aPtr);
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if (!mIsDestroying) {
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mFrameArena.Free(aID, aPtr);
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}
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}
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Document* GetDocument() const { return mDocument; }
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nsPresContext* GetPresContext() const { return mPresContext; }
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nsViewManager* GetViewManager() const { return mViewManager; }
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nsRefreshDriver* GetRefreshDriver() const;
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nsCSSFrameConstructor* FrameConstructor() const {
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return mFrameConstructor.get();
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}
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/**
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* FrameSelection will return the Frame based selection API.
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* You cannot go back and forth anymore with QI between nsIDOM sel and
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* nsIFrame sel.
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*/
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already_AddRefed<nsFrameSelection> FrameSelection();
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/**
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* ConstFrameSelection returns an object which methods are safe to use for
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* example in nsIFrame code.
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*/
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const nsFrameSelection* ConstFrameSelection() const { return mSelection; }
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// Start receiving notifications from our document. If called after Destroy,
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// this will be ignored.
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void BeginObservingDocument();
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// Stop receiving notifications from our document. If called after Destroy,
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// this will be ignored.
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void EndObservingDocument();
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bool IsObservingDocument() const { return mIsObservingDocument; }
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/**
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* Return whether Initialize() was previously called.
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*/
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bool DidInitialize() const { return mDidInitialize; }
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/**
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* Perform initialization. Constructs the frame for the root content
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* object and then enqueues a reflow of the frame model.
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*
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* Callers of this method must hold a reference to this shell that
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* is guaranteed to survive through arbitrary script execution.
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* Calling Initialize can execute arbitrary script.
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*/
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MOZ_CAN_RUN_SCRIPT_BOUNDARY nsresult Initialize();
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/**
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* Reflow the frame model into a new width and height. The
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* coordinates for aWidth and aHeight must be in standard nscoord's.
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*/
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MOZ_CAN_RUN_SCRIPT nsresult
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ResizeReflow(nscoord aWidth, nscoord aHeight,
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ResizeReflowOptions = ResizeReflowOptions::NoOption);
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MOZ_CAN_RUN_SCRIPT nsresult ResizeReflowIgnoreOverride(nscoord aWidth,
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nscoord aHeight,
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ResizeReflowOptions);
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/**
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* Add this pres shell to the refresh driver to be observed for resize
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* event if applicable.
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*/
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void AddResizeEventFlushObserverIfNeeded();
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/**
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* Returns true if the document hosted by this presShell is in a devtools
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* Responsive Design Mode browsing context.
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*/
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bool InRDMPane();
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private:
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/**
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* This is what ResizeReflowIgnoreOverride does when not shrink-wrapping (that
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* is, when ResizeReflowOptions::BSizeLimit is not specified).
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*/
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void SimpleResizeReflow(nscoord aWidth, nscoord aHeight, ResizeReflowOptions);
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public:
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/**
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* Note that the assumptions that determine whether we need a mobile viewport
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* manager may have changed.
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*/
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void MaybeRecreateMobileViewportManager(bool aAfterInitialization);
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/**
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* Returns true if this document uses mobile viewport sizing (including
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* processing of <meta name="viewport"> tags).
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*
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* Note that having a MobileViewportManager does not necessarily mean using
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* mobile viewport sizing, as with desktop zooming we can have a
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* MobileViewportManager on desktop, but we only want to do mobile viewport
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* sizing on mobile. (TODO: Rename MobileViewportManager to reflect its more
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* general role.)
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*/
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bool UsesMobileViewportSizing() const;
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/**
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* Get the MobileViewportManager used to manage the document's mobile
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* viewport. Will return null in situations where we don't have a mobile
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* viewport, and for documents that are not the root content document.
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*/
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RefPtr<MobileViewportManager> GetMobileViewportManager() const;
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/**
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* Return true if the presshell expects layout flush.
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*/
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bool IsLayoutFlushObserver();
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/**
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* Called when document load completes.
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*/
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void LoadComplete();
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/**
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* This calls through to the frame manager to get the root frame.
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*/
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nsIFrame* GetRootFrame() const { return mFrameManager->GetRootFrame(); }
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/*
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* Get root scroll frame from FrameManager()->GetRootFrame().
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*/
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nsIFrame* GetRootScrollFrame() const;
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/*
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* The same as GetRootScrollFrame, but returns an nsIScrollableFrame
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*/
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nsIScrollableFrame* GetRootScrollFrameAsScrollable() const;
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/**
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* Get the current focused content or DOM selection that should be the
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* target for scrolling.
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*/
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already_AddRefed<nsIContent> GetContentForScrolling() const;
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/**
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* Get the DOM selection that should be the target for scrolling, if there
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* is no focused content.
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*/
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already_AddRefed<nsIContent> GetSelectedContentForScrolling() const;
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/**
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* Gets nearest scrollable frame from the specified content node. The frame
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* is scrollable with overflow:scroll or overflow:auto in some direction when
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* aDirection is eEither. Otherwise, this returns a nearest frame that is
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* scrollable in the specified direction.
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*/
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nsIScrollableFrame* GetScrollableFrameToScrollForContent(
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nsIContent* aContent, layers::ScrollDirections aDirections);
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/**
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* Gets nearest scrollable frame from current focused content or DOM
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* selection if there is no focused content. The frame is scrollable with
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* overflow:scroll or overflow:auto in some direction when aDirection is
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* eEither. Otherwise, this returns a nearest frame that is scrollable in
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* the specified direction.
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*/
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nsIScrollableFrame* GetScrollableFrameToScroll(
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layers::ScrollDirections aDirections);
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/**
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* Returns the page sequence frame associated with the frame hierarchy.
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* Returns nullptr if not a paginated view.
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*/
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nsPageSequenceFrame* GetPageSequenceFrame() const;
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/**
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* Returns the canvas frame associated with the frame hierarchy.
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* Returns nullptr if is XUL document.
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*/
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nsCanvasFrame* GetCanvasFrame() const;
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void PostPendingScrollAnchorSelection(
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layout::ScrollAnchorContainer* aContainer);
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void FlushPendingScrollAnchorSelections();
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void PostPendingScrollAnchorAdjustment(
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layout::ScrollAnchorContainer* aContainer);
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void CancelAllPendingReflows();
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MOZ_CAN_RUN_SCRIPT_BOUNDARY void NotifyCounterStylesAreDirty();
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bool FrameIsAncestorOfDirtyRoot(nsIFrame* aFrame) const;
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/**
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* Destroy the frames for aElement, and reconstruct them asynchronously if
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* needed.
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*
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* Note that this may destroy frames for an ancestor instead.
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*/
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void DestroyFramesForAndRestyle(Element* aElement);
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/**
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* Handles all the layout stuff needed when the slot assignment for an element
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* is about to change.
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*
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* Only called when the slot attribute of the element changes, the rest of
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* the changes should be handled in ShadowRoot.
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*/
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void SlotAssignmentWillChange(Element& aElement,
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dom::HTMLSlotElement* aOldSlot,
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dom::HTMLSlotElement* aNewSlot);
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void PostRecreateFramesFor(Element*);
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void RestyleForAnimation(Element*, RestyleHint);
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/**
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* Determine if it is safe to flush all pending notifications.
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*/
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bool IsSafeToFlush() const;
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/**
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* Informs the document's FontFaceSet that the refresh driver ticked,
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* flushing style and layout.
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*/
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void NotifyFontFaceSetOnRefresh();
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// Removes ourself from the list of layout / style / and resize refresh driver
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// observers.
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//
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// Right now this is only used for documents in the BFCache, so if you want to
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// use this for anything else you need to ensure we don't end up in those
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// lists after calling this, but before calling StartObservingRefreshDriver
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// again.
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//
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// That is handled by the mDocument->GetBFCacheEntry checks in
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// DoObserve*Flushes functions, though that could conceivably become a boolean
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// member in the shell if needed.
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//
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// Callers are responsible of manually calling StartObservingRefreshDriver
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// again.
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void StopObservingRefreshDriver();
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void StartObservingRefreshDriver();
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bool ObservingStyleFlushes() const { return mObservingStyleFlushes; }
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bool ObservingLayoutFlushes() const { return mObservingLayoutFlushes; }
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void ObserveStyleFlushes() {
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if (!ObservingStyleFlushes()) {
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DoObserveStyleFlushes();
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}
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}
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/**
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* Callbacks will be called even if reflow itself fails for
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* some reason.
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*/
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nsresult PostReflowCallback(nsIReflowCallback* aCallback);
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void CancelReflowCallback(nsIReflowCallback* aCallback);
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void ScheduleBeforeFirstPaint();
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void UnsuppressAndInvalidate();
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void ClearFrameRefs(nsIFrame* aFrame);
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// Clears the selection of the older focused frame selection if any.
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void FrameSelectionWillTakeFocus(nsFrameSelection&);
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// Clears and repaint mFocusedFrameSelection if it matches the argument.
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|
void FrameSelectionWillLoseFocus(nsFrameSelection&);
|
|
|
|
/**
|
|
* Get a reference rendering context. This is a context that should not
|
|
* be rendered to, but is suitable for measuring text and performing
|
|
* other non-rendering operations. Guaranteed to return non-null.
|
|
*/
|
|
already_AddRefed<gfxContext> CreateReferenceRenderingContext();
|
|
|
|
/**
|
|
* Scrolls the view of the document so that the given area of a frame
|
|
* is visible, if possible. Layout is not flushed before scrolling.
|
|
*
|
|
* @param aRect Relative to aFrame. The rect edges will be respected even if
|
|
* the rect is empty.
|
|
* @param aVertical see ScrollContentIntoView and ScrollAxis
|
|
* @param aHorizontal see ScrollContentIntoView and ScrollAxis
|
|
* @param aScrollFlags if SCROLL_FIRST_ANCESTOR_ONLY is set, only the
|
|
* nearest scrollable ancestor is scrolled, otherwise all
|
|
* scrollable ancestors may be scrolled if necessary
|
|
* if SCROLL_OVERFLOW_HIDDEN is set then we may scroll in a direction
|
|
* even if overflow:hidden is specified in that direction; otherwise
|
|
* we will not scroll in that direction when overflow:hidden is
|
|
* set for that direction
|
|
* If SCROLL_NO_PARENT_FRAMES is set then we only scroll
|
|
* nodes in this document, not in any parent documents which
|
|
* contain this document in a iframe or the like.
|
|
* If SCROLL_IGNORE_SCROLL_MARGIN_AND_PADDING is set we ignore scroll-margin
|
|
* value specified for |aFrame| and scroll-padding value for the scroll
|
|
* container. This option is typically used to locate poped-up frames into
|
|
* view.
|
|
* @return true if any scrolling happened, false if no scrolling happened
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT
|
|
bool ScrollFrameRectIntoView(nsIFrame* aFrame, const nsRect& aRect,
|
|
ScrollAxis aVertical, ScrollAxis aHorizontal,
|
|
ScrollFlags aScrollFlags);
|
|
|
|
/**
|
|
* Suppress notification of the frame manager that frames are
|
|
* being destroyed.
|
|
*/
|
|
void SetIgnoreFrameDestruction(bool aIgnore);
|
|
|
|
/**
|
|
* Get the AccessibleCaretEventHub, if it exists. AddRefs it.
|
|
*/
|
|
already_AddRefed<AccessibleCaretEventHub> GetAccessibleCaretEventHub() const;
|
|
|
|
/**
|
|
* Get the caret, if it exists. AddRefs it.
|
|
*/
|
|
already_AddRefed<nsCaret> GetCaret() const;
|
|
|
|
/**
|
|
* Set the current caret to a new caret. To undo this, call RestoreCaret.
|
|
*/
|
|
void SetCaret(nsCaret* aNewCaret);
|
|
|
|
/**
|
|
* Restore the caret to the original caret that this pres shell was created
|
|
* with.
|
|
*/
|
|
void RestoreCaret();
|
|
|
|
dom::Selection* GetCurrentSelection(SelectionType aSelectionType);
|
|
|
|
/**
|
|
* Gets the last selection that took focus in this document. This is basically
|
|
* the frame selection that's visible to the user.
|
|
*/
|
|
nsFrameSelection* GetLastFocusedFrameSelection();
|
|
|
|
/**
|
|
* Interface to dispatch events via the presshell
|
|
* @note The caller must have a strong reference to the PresShell.
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT
|
|
nsresult HandleEventWithTarget(WidgetEvent* aEvent, nsIFrame* aFrame,
|
|
nsIContent* aContent,
|
|
nsEventStatus* aEventStatus,
|
|
bool aIsHandlingNativeEvent = false,
|
|
nsIContent** aTargetContent = nullptr,
|
|
nsIContent* aOverrideClickTarget = nullptr) {
|
|
MOZ_ASSERT(aEvent);
|
|
EventHandler eventHandler(*this);
|
|
return eventHandler.HandleEventWithTarget(
|
|
aEvent, aFrame, aContent, aEventStatus, aIsHandlingNativeEvent,
|
|
aTargetContent, aOverrideClickTarget);
|
|
}
|
|
|
|
/**
|
|
* Dispatch event to content only (NOT full processing)
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT
|
|
nsresult HandleDOMEventWithTarget(nsIContent* aTargetContent,
|
|
WidgetEvent* aEvent,
|
|
nsEventStatus* aStatus);
|
|
|
|
/**
|
|
* Dispatch event to content only (NOT full processing)
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT
|
|
nsresult HandleDOMEventWithTarget(nsIContent* aTargetContent,
|
|
dom::Event* aEvent, nsEventStatus* aStatus);
|
|
|
|
/**
|
|
* Return whether or not the event is valid to be dispatched
|
|
*/
|
|
bool CanDispatchEvent(const WidgetGUIEvent* aEvent = nullptr) const;
|
|
|
|
/**
|
|
* Gets the current target event frame from the PresShell
|
|
*/
|
|
nsIFrame* GetCurrentEventFrame();
|
|
|
|
/**
|
|
* Gets the current target event frame from the PresShell
|
|
*/
|
|
already_AddRefed<nsIContent> GetEventTargetContent(WidgetEvent* aEvent);
|
|
|
|
/**
|
|
* Get and set the history state for the current document
|
|
*/
|
|
nsresult CaptureHistoryState(nsILayoutHistoryState** aLayoutHistoryState);
|
|
|
|
/**
|
|
* Determine if reflow is currently locked
|
|
* returns true if reflow is locked, false otherwise
|
|
*/
|
|
bool IsReflowLocked() const { return mIsReflowing; }
|
|
|
|
/**
|
|
* Called to find out if painting is suppressed for this presshell. If it is
|
|
* suppressd, we don't allow the painting of any layer but the background, and
|
|
* we don't recur into our children.
|
|
*/
|
|
bool IsPaintingSuppressed() const { return mPaintingSuppressed; }
|
|
|
|
void UnsuppressPainting();
|
|
void InitPaintSuppressionTimer();
|
|
void CancelPaintSuppressionTimer();
|
|
|
|
/**
|
|
* Reconstruct frames for all elements in the document
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT void ReconstructFrames();
|
|
|
|
/**
|
|
* See if reflow verification is enabled. To enable reflow verification add
|
|
* "verifyreflow:1" to your MOZ_LOG environment variable (any non-zero
|
|
* debug level will work). Or, call SetVerifyReflowEnable with true.
|
|
*/
|
|
static bool GetVerifyReflowEnable();
|
|
|
|
/**
|
|
* Set the verify-reflow enable flag.
|
|
*/
|
|
static void SetVerifyReflowEnable(bool aEnabled);
|
|
|
|
nsIFrame* GetAbsoluteContainingBlock(nsIFrame* aFrame);
|
|
|
|
#ifdef MOZ_REFLOW_PERF
|
|
void DumpReflows();
|
|
void CountReflows(const char* aName, nsIFrame* aFrame);
|
|
void PaintCount(const char* aName, gfxContext* aRenderingContext,
|
|
nsPresContext* aPresContext, nsIFrame* aFrame,
|
|
const nsPoint& aOffset, uint32_t aColor);
|
|
void SetPaintFrameCount(bool aOn);
|
|
bool IsPaintingFrameCounts();
|
|
#endif // #ifdef MOZ_REFLOW_PERF
|
|
|
|
// Debugging hooks
|
|
#ifdef DEBUG
|
|
void ListComputedStyles(FILE* out, int32_t aIndent = 0);
|
|
#endif
|
|
#if defined(DEBUG) || defined(MOZ_LAYOUT_DEBUGGER)
|
|
void ListStyleSheets(FILE* out, int32_t aIndent = 0);
|
|
#endif
|
|
|
|
/**
|
|
* Stop all refresh drivers and carets in this presentation and
|
|
* in the presentations of subdocuments. Resets painting to a suppressed
|
|
* state.
|
|
* XXX this should include image animations
|
|
*/
|
|
void Freeze(bool aIncludeSubDocuments = true);
|
|
bool IsFrozen() { return mFrozen; }
|
|
|
|
/**
|
|
* Restarts refresh drivers in this presentation and in the
|
|
* presentations of subdocuments, then do a full invalidate of the content
|
|
* area.
|
|
*/
|
|
void Thaw(bool aIncludeSubDocuments = true);
|
|
|
|
void FireOrClearDelayedEvents(bool aFireEvents);
|
|
|
|
/**
|
|
* When this shell is disconnected from its containing docshell, we
|
|
* lose our container pointer. However, we'd still like to be able to target
|
|
* user events at the docshell's parent. This pointer allows us to do that.
|
|
* It should not be used for any other purpose.
|
|
*/
|
|
void SetForwardingContainer(const WeakPtr<nsDocShell>& aContainer);
|
|
|
|
/**
|
|
* Render the document into an arbitrary gfxContext
|
|
* Designed for getting a picture of a document or a piece of a document
|
|
* Note that callers will generally want to call FlushPendingNotifications
|
|
* to get an up-to-date view of the document
|
|
* @param aRect is the region to capture into the offscreen buffer, in the
|
|
* root frame's coordinate system (if aIgnoreViewportScrolling is false)
|
|
* or in the root scrolled frame's coordinate system
|
|
* (if aIgnoreViewportScrolling is true). The coordinates are in appunits.
|
|
* @param aFlags see below;
|
|
* set RenderDocumentFlags::IsUntrusted if the contents may be passed to
|
|
* malicious agents. E.g. we might choose not to paint the contents of
|
|
* sensitive widgets such as the file name in a file upload widget, and we
|
|
* might choose not to paint themes.
|
|
* set RenderDocumentFlags::IgnoreViewportScrolling to ignore clipping and
|
|
* scrollbar painting due to scrolling in the viewport
|
|
* set RenderDocumentFlags::ResetViewportScrolling to temporarily set the
|
|
* viewport scroll position to 0 so that position:fixed elements are drawn
|
|
* at their initial position.
|
|
* set RenderDocumentFlags::DrawCaret to draw the caret if one would be
|
|
* visible (by default the caret is never drawn)
|
|
* set RenderDocumentFlags::UseWidgetLayers to force rendering to go
|
|
* through the layer manager for the window. This may be unexpectedly slow
|
|
* (if the layer manager must read back data from the GPU) or low-quality
|
|
* (if the layer manager reads back pixel data and scales it
|
|
* instead of rendering using the appropriate scaling). It may also
|
|
* slow everything down if the area rendered does not correspond to the
|
|
* normal visible area of the window.
|
|
* set RenderDocumentFlags::AsyncDecodeImages to avoid having images
|
|
* synchronously decoded during rendering.
|
|
* (by default images decode synchronously with RenderDocument)
|
|
* set RenderDocumentFlags::DocumentRelative to render the document as if
|
|
* there has been no scrolling and interpret |aRect| relative to the document
|
|
* instead of the CSS viewport. Only considered if
|
|
* RenderDocumentFlags::IgnoreViewportScrolling is set or the document is in
|
|
* ignore viewport scrolling mode
|
|
* (PresShell::SetIgnoreViewportScrolling/IgnoringViewportScrolling).
|
|
* set RenderDocumentFlags::UseHighQualityScaling to enable downscale on
|
|
* decode for images.
|
|
* @param aBackgroundColor a background color to render onto
|
|
* @param aRenderedContext the gfxContext to render to. We render so that
|
|
* one CSS pixel in the source document is rendered to one unit in the current
|
|
* transform.
|
|
*/
|
|
nsresult RenderDocument(const nsRect& aRect, RenderDocumentFlags aFlags,
|
|
nscolor aBackgroundColor,
|
|
gfxContext* aRenderedContext);
|
|
|
|
/**
|
|
* Renders a node aNode to a surface and returns it. The aRegion may be used
|
|
* to clip the rendering. This region is measured in CSS pixels from the
|
|
* edge of the presshell area. The aPoint, aScreenRect and aFlags arguments
|
|
* function in a similar manner as RenderSelection.
|
|
*/
|
|
already_AddRefed<SourceSurface> RenderNode(nsINode* aNode,
|
|
const Maybe<CSSIntRegion>& aRegion,
|
|
const LayoutDeviceIntPoint aPoint,
|
|
LayoutDeviceIntRect* aScreenRect,
|
|
RenderImageFlags aFlags);
|
|
|
|
/**
|
|
* Renders a selection to a surface and returns it. This method is primarily
|
|
* intended to create the drag feedback when dragging a selection.
|
|
*
|
|
* aScreenRect will be filled in with the bounding rectangle of the
|
|
* selection area on screen.
|
|
*
|
|
* If the area of the selection is large and the RenderImageFlags::AutoScale
|
|
* is set, the image will be scaled down. The argument aPoint is used in this
|
|
* case as a reference point when determining the new screen rectangle after
|
|
* scaling. Typically, this will be the mouse position, so that the screen
|
|
* rectangle is positioned such that the mouse is over the same point in the
|
|
* scaled image as in the original. When scaling does not occur, the mouse
|
|
* point isn't used because the position can be determined from the displayed
|
|
* frames.
|
|
*/
|
|
already_AddRefed<SourceSurface> RenderSelection(
|
|
dom::Selection* aSelection, const LayoutDeviceIntPoint aPoint,
|
|
LayoutDeviceIntRect* aScreenRect, RenderImageFlags aFlags);
|
|
|
|
void AddAutoWeakFrame(AutoWeakFrame* aWeakFrame);
|
|
void AddWeakFrame(WeakFrame* aWeakFrame);
|
|
|
|
void RemoveAutoWeakFrame(AutoWeakFrame* aWeakFrame);
|
|
void RemoveWeakFrame(WeakFrame* aWeakFrame);
|
|
|
|
/**
|
|
* Stop or restart non synthetic test mouse event handling on *all*
|
|
* presShells.
|
|
*
|
|
* @param aDisable If true, disable all non synthetic test mouse
|
|
* events on all presShells. Otherwise, enable them.
|
|
*/
|
|
void DisableNonTestMouseEvents(bool aDisable);
|
|
|
|
/**
|
|
* Record the background color of the most recently drawn canvas. This color
|
|
* is composited on top of the user's default background color and then used
|
|
* to draw the background color of the canvas. See PresShell::Paint,
|
|
* PresShell::PaintDefaultBackground, and nsDocShell::SetupNewViewer;
|
|
* bug 488242, bug 476557 and other bugs mentioned there.
|
|
*/
|
|
void SetCanvasBackground(nscolor aColor) { mCanvasBackgroundColor = aColor; }
|
|
nscolor GetCanvasBackground() { return mCanvasBackgroundColor; }
|
|
|
|
/**
|
|
* Use the current frame tree (if it exists) to update the background
|
|
* color of the most recently drawn canvas.
|
|
*/
|
|
void UpdateCanvasBackground();
|
|
|
|
/**
|
|
* Add a solid color item to the bottom of aList with frame aFrame and
|
|
* bounds aBounds representing the dark grey background behind the page of a
|
|
* print preview presentation.
|
|
*/
|
|
void AddPrintPreviewBackgroundItem(nsDisplayListBuilder* aBuilder,
|
|
nsDisplayList* aList, nsIFrame* aFrame,
|
|
const nsRect& aBounds);
|
|
|
|
/**
|
|
* Computes the backstop color for the view: transparent if in a transparent
|
|
* widget, otherwise the PresContext default background color. This color is
|
|
* only visible if the contents of the view as a whole are translucent.
|
|
*/
|
|
nscolor ComputeBackstopColor(nsView* aDisplayRoot);
|
|
|
|
void ObserveNativeAnonMutationsForPrint(bool aObserve) {
|
|
mObservesMutationsForPrint = aObserve;
|
|
}
|
|
bool ObservesNativeAnonMutationsForPrint() {
|
|
return mObservesMutationsForPrint;
|
|
}
|
|
|
|
nsresult SetIsActive(bool aIsActive);
|
|
|
|
bool IsActive() { return mIsActive; }
|
|
|
|
/**
|
|
* Keep track of how many times this presshell has been rendered to
|
|
* a window.
|
|
*/
|
|
uint64_t GetPaintCount() { return mPaintCount; }
|
|
void IncrementPaintCount() { ++mPaintCount; }
|
|
|
|
/**
|
|
* Get the root DOM window of this presShell.
|
|
*/
|
|
already_AddRefed<nsPIDOMWindowOuter> GetRootWindow();
|
|
|
|
/**
|
|
* 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<nsPIDOMWindowOuter> GetFocusedDOMWindowInOurWindow();
|
|
|
|
/**
|
|
* Get the focused content under this window.
|
|
*/
|
|
already_AddRefed<nsIContent> GetFocusedContentInOurWindow() const;
|
|
|
|
/**
|
|
* Get the layer manager for the widget of the root view, if it has
|
|
* one.
|
|
*/
|
|
LayerManager* GetLayerManager();
|
|
|
|
/**
|
|
* Return true iff there is a widget rendering this presShell and that
|
|
* widget is APZ-enabled.
|
|
*/
|
|
bool AsyncPanZoomEnabled();
|
|
|
|
/**
|
|
* Track whether we're ignoring viewport scrolling for the purposes
|
|
* of painting. If we are ignoring, then layers aren't clipped to
|
|
* the CSS viewport and scrollbars aren't drawn.
|
|
*/
|
|
bool IgnoringViewportScrolling() const {
|
|
return !!(mRenderingStateFlags &
|
|
RenderingStateFlags::IgnoringViewportScrolling);
|
|
}
|
|
|
|
float GetResolution() const { return mResolution.valueOr(1.0); }
|
|
float GetCumulativeResolution() const;
|
|
|
|
/**
|
|
* Accessors for a flag that tracks whether the most recent change to
|
|
* the pres shell's resolution was originated by the main thread.
|
|
*/
|
|
bool IsResolutionUpdated() const { return mResolutionUpdated; }
|
|
void SetResolutionUpdated(bool aUpdated) { mResolutionUpdated = aUpdated; }
|
|
|
|
/**
|
|
* Returns true if the resolution has ever been changed by APZ.
|
|
*/
|
|
bool IsResolutionUpdatedByApz() const { return mResolutionUpdatedByApz; }
|
|
|
|
/**
|
|
* Used by session restore code to restore a resolution before the first
|
|
* paint.
|
|
*/
|
|
void SetRestoreResolution(float aResolution,
|
|
LayoutDeviceIntSize aDisplaySize);
|
|
|
|
/**
|
|
* Returns whether we are in a DrawWindow() call that used the
|
|
* DRAWWINDOW_DO_NOT_FLUSH flag.
|
|
*/
|
|
bool InDrawWindowNotFlushing() const {
|
|
return !!(mRenderingStateFlags &
|
|
RenderingStateFlags::DrawWindowNotFlushing);
|
|
}
|
|
|
|
/**
|
|
* Set the isFirstPaint flag.
|
|
*/
|
|
void SetIsFirstPaint(bool aIsFirstPaint) { mIsFirstPaint = aIsFirstPaint; }
|
|
|
|
/**
|
|
* Get the isFirstPaint flag.
|
|
*/
|
|
bool GetIsFirstPaint() const { return mIsFirstPaint; }
|
|
|
|
uint32_t GetPresShellId() { return mPresShellId; }
|
|
|
|
/**
|
|
* Dispatch a mouse move event based on the most recent mouse position if
|
|
* this PresShell is visible. This is used when the contents of the page
|
|
* moved (aFromScroll is false) or scrolled (aFromScroll is true).
|
|
*/
|
|
void SynthesizeMouseMove(bool aFromScroll);
|
|
|
|
MOZ_CAN_RUN_SCRIPT
|
|
nsresult HandleEvent(nsIFrame* aFrame, WidgetGUIEvent* aEvent,
|
|
bool aDontRetargetEvents, nsEventStatus* aEventStatus);
|
|
bool ShouldIgnoreInvalidation();
|
|
/**
|
|
* Notify that we called Paint with PaintFlags::PaintComposite.
|
|
* Fires on the presshell for the painted widget.
|
|
* This is issued at a time when it's safe to modify widget geometry.
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT void DidPaintWindow();
|
|
|
|
bool IsVisible() const;
|
|
bool IsUnderHiddenEmbedderElement() const {
|
|
return mUnderHiddenEmbedderElement;
|
|
}
|
|
void SetIsUnderHiddenEmbedderElement(bool aUnderHiddenEmbedderElement);
|
|
MOZ_CAN_RUN_SCRIPT
|
|
void DispatchSynthMouseMove(WidgetGUIEvent* aEvent);
|
|
|
|
/* Temporarily ignore the Displayport for better paint performance. We
|
|
* trigger a repaint once suppression is disabled. Without that
|
|
* the displayport may get left at the suppressed size for an extended
|
|
* period of time and result in unnecessary checkerboarding (see bug
|
|
* 1255054). */
|
|
void SuppressDisplayport(bool aEnabled);
|
|
|
|
/* Whether or not displayport suppression should be turned on. Note that
|
|
* this only affects the return value of |IsDisplayportSuppressed()|, and
|
|
* doesn't change the value of the internal counter.
|
|
*/
|
|
void RespectDisplayportSuppression(bool aEnabled);
|
|
|
|
/* Whether or not the displayport is currently suppressed. */
|
|
bool IsDisplayportSuppressed();
|
|
|
|
void AddSizeOfIncludingThis(nsWindowSizes& aWindowSizes) const;
|
|
|
|
/**
|
|
* Methods that retrieve the cached font inflation preferences.
|
|
*/
|
|
uint32_t FontSizeInflationEmPerLine() const {
|
|
return mFontSizeInflationEmPerLine;
|
|
}
|
|
|
|
uint32_t FontSizeInflationMinTwips() const {
|
|
return mFontSizeInflationMinTwips;
|
|
}
|
|
|
|
uint32_t FontSizeInflationLineThreshold() const {
|
|
return mFontSizeInflationLineThreshold;
|
|
}
|
|
|
|
bool FontSizeInflationForceEnabled() const {
|
|
return mFontSizeInflationForceEnabled;
|
|
}
|
|
|
|
bool FontSizeInflationDisabledInMasterProcess() const {
|
|
return mFontSizeInflationDisabledInMasterProcess;
|
|
}
|
|
|
|
bool FontSizeInflationEnabled() const { return mFontSizeInflationEnabled; }
|
|
|
|
/**
|
|
* Recomputes whether font-size inflation is enabled.
|
|
*/
|
|
void RecomputeFontSizeInflationEnabled();
|
|
|
|
/**
|
|
* Return true if the most recent interruptible reflow was interrupted.
|
|
*/
|
|
bool IsReflowInterrupted() const { return mWasLastReflowInterrupted; }
|
|
|
|
/**
|
|
* Return true if the the interruptible reflows have to be suppressed.
|
|
* This may happen only if if the most recent reflow was interrupted.
|
|
*/
|
|
bool SuppressInterruptibleReflows() const {
|
|
return mWasLastReflowInterrupted;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
// Approximate frame visibility tracking public API.
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
/**
|
|
* Schedule an update of the list of approximately visible frames "soon".
|
|
* This lets the refresh driver know that we want a visibility update in the
|
|
* near future. The refresh driver applies its own heuristics and throttling
|
|
* to decide when to actually perform the visibility update.
|
|
*/
|
|
void ScheduleApproximateFrameVisibilityUpdateSoon();
|
|
|
|
/**
|
|
* Schedule an update of the list of approximately visible frames "now". The
|
|
* update runs asynchronously, but it will be posted to the event loop
|
|
* immediately. Prefer the "soon" variation of this method when possible, as
|
|
* this variation ignores the refresh driver's heuristics.
|
|
*/
|
|
void ScheduleApproximateFrameVisibilityUpdateNow();
|
|
|
|
/**
|
|
* Clears the current list of approximately visible frames on this pres shell
|
|
* and replaces it with frames that are in the display list @aList.
|
|
*/
|
|
void RebuildApproximateFrameVisibilityDisplayList(const nsDisplayList& aList);
|
|
void RebuildApproximateFrameVisibility(nsRect* aRect = nullptr,
|
|
bool aRemoveOnly = false);
|
|
|
|
/**
|
|
* Ensures @aFrame is in the list of approximately visible frames.
|
|
*/
|
|
void EnsureFrameInApproximatelyVisibleList(nsIFrame* aFrame);
|
|
|
|
/// Removes @aFrame from the list of approximately visible frames if present.
|
|
void RemoveFrameFromApproximatelyVisibleList(nsIFrame* aFrame);
|
|
|
|
/// Whether we should assume all frames are visible.
|
|
bool AssumeAllFramesVisible();
|
|
|
|
/**
|
|
* Returns whether the document's style set's rule processor for the
|
|
* specified level of the cascade is shared by multiple style sets.
|
|
*
|
|
* @param aSheetType One of the nsIStyleSheetService.*_SHEET constants.
|
|
*/
|
|
nsresult HasRuleProcessorUsedByMultipleStyleSets(uint32_t aSheetType,
|
|
bool* aRetVal);
|
|
|
|
/**
|
|
* Returns whether or not the document has ever handled user input
|
|
*/
|
|
bool HasHandledUserInput() const { return mHasHandledUserInput; }
|
|
|
|
MOZ_CAN_RUN_SCRIPT void FireResizeEvent();
|
|
|
|
void NativeAnonymousContentRemoved(nsIContent* aAnonContent);
|
|
|
|
/**
|
|
* See HTMLDocument.setKeyPressEventModel() in HTMLDocument.webidl for the
|
|
* detail.
|
|
*/
|
|
void SetKeyPressEventModel(uint16_t aKeyPressEventModel) {
|
|
mForceUseLegacyKeyCodeAndCharCodeValues |=
|
|
aKeyPressEventModel ==
|
|
dom::Document_Binding::KEYPRESS_EVENT_MODEL_SPLIT;
|
|
}
|
|
|
|
bool AddRefreshObserver(nsARefreshObserver* aObserver, FlushType aFlushType,
|
|
const char* aObserverDescription);
|
|
bool RemoveRefreshObserver(nsARefreshObserver* aObserver,
|
|
FlushType aFlushType);
|
|
|
|
bool AddPostRefreshObserver(nsAPostRefreshObserver*);
|
|
bool AddPostRefreshObserver(mozilla::ManagedPostRefreshObserver*) = delete;
|
|
bool RemovePostRefreshObserver(nsAPostRefreshObserver*);
|
|
bool RemovePostRefreshObserver(mozilla::ManagedPostRefreshObserver*) = delete;
|
|
|
|
// Represents an update to the visual scroll offset that will be sent to APZ.
|
|
// The update type is used to determine priority compared to other scroll
|
|
// updates.
|
|
struct VisualScrollUpdate {
|
|
nsPoint mVisualScrollOffset;
|
|
FrameMetrics::ScrollOffsetUpdateType mUpdateType;
|
|
bool mAcknowledged = false;
|
|
};
|
|
|
|
// Ask APZ in the next transaction to scroll to the given visual viewport
|
|
// offset (relative to the document).
|
|
// This is intended to be used when desired in cases where the browser
|
|
// internally triggers scrolling; scrolling triggered explicitly by web
|
|
// content (such as via window.scrollTo() should scroll the layout viewport
|
|
// only).
|
|
// If scrolling "far away", i.e. not just within the existing layout
|
|
// viewport, it's recommended to use both nsIScrollableFrame.ScrollTo*()
|
|
// (via window.scrollTo if calling from JS) *and* this function; otherwise,
|
|
// temporary checkerboarding may result. If doing this:
|
|
// * Be sure to call ScrollTo*() first, as a subsequent layout scroll
|
|
// in the same transaction will cancel the pending visual scroll.
|
|
// * Keep in mind that ScrollTo*() can tear down the pres shell and
|
|
// frame tree. Depending on how the pres shell is obtained for the
|
|
// subsequent ScrollToVisual() call, AutoWeakFrame or similar may
|
|
// need to be used.
|
|
// Please request APZ review if adding a new call site.
|
|
void ScrollToVisual(const nsPoint& aVisualViewportOffset,
|
|
FrameMetrics::ScrollOffsetUpdateType aUpdateType,
|
|
ScrollMode aMode);
|
|
void AcknowledgePendingVisualScrollUpdate();
|
|
void ClearPendingVisualScrollUpdate();
|
|
const Maybe<VisualScrollUpdate>& GetPendingVisualScrollUpdate() const {
|
|
return mPendingVisualScrollUpdate;
|
|
}
|
|
|
|
nsPoint GetLayoutViewportOffset() const;
|
|
nsSize GetLayoutViewportSize() const;
|
|
|
|
/**
|
|
* Documents belonging to an invisible DocShell must not be painted ever.
|
|
*/
|
|
bool IsNeverPainting() { return mIsNeverPainting; }
|
|
|
|
void SetNeverPainting(bool aNeverPainting) {
|
|
mIsNeverPainting = aNeverPainting;
|
|
}
|
|
|
|
/**
|
|
* True if a reflow event has been scheduled, or is going to be scheduled
|
|
* to run in the future.
|
|
*/
|
|
bool HasPendingReflow() const {
|
|
return mObservingLayoutFlushes || mReflowContinueTimer;
|
|
}
|
|
|
|
void SyncWindowProperties(nsView* aView);
|
|
|
|
Document* GetPrimaryContentDocument();
|
|
|
|
struct MOZ_RAII AutoAssertNoFlush {
|
|
explicit AutoAssertNoFlush(PresShell& aPresShell)
|
|
: mPresShell(aPresShell), mOldForbidden(mPresShell.mForbiddenToFlush) {
|
|
mPresShell.mForbiddenToFlush = true;
|
|
}
|
|
|
|
~AutoAssertNoFlush() { mPresShell.mForbiddenToFlush = mOldForbidden; }
|
|
|
|
PresShell& mPresShell;
|
|
const bool mOldForbidden;
|
|
};
|
|
|
|
NS_IMETHOD GetSelectionFromScript(RawSelectionType aRawSelectionType,
|
|
dom::Selection** aSelection) override;
|
|
dom::Selection* GetSelection(RawSelectionType aRawSelectionType) override;
|
|
|
|
NS_IMETHOD SetDisplaySelection(int16_t aToggle) override;
|
|
NS_IMETHOD GetDisplaySelection(int16_t* aToggle) override;
|
|
NS_IMETHOD ScrollSelectionIntoView(RawSelectionType aRawSelectionType,
|
|
SelectionRegion aRegion,
|
|
int16_t aFlags) override;
|
|
NS_IMETHOD RepaintSelection(RawSelectionType aRawSelectionType) override;
|
|
void SelectionWillTakeFocus() override;
|
|
void SelectionWillLoseFocus() override;
|
|
|
|
/**
|
|
* Set a "resolution" for the document, which if not 1.0 will
|
|
* allocate more or fewer pixels for rescalable content by a factor
|
|
* of |resolution| in both dimensions. Return NS_OK iff the
|
|
* resolution bounds are sane, and the resolution of this was
|
|
* actually updated.
|
|
*
|
|
* Also increase the scale of the content by the same amount
|
|
* (that's the "AndScaleTo" part).
|
|
*
|
|
* The resolution defaults to 1.0.
|
|
*
|
|
* |aOrigin| specifies who originated the resolution change. For changes
|
|
* sent by APZ, pass ResolutionChangeOrigin::Apz. For changes sent by
|
|
* the main thread, pass ResolutionChangeOrigin::MainThreadAdjustment (similar
|
|
* to the |aOrigin| parameter of nsIScrollableFrame::ScrollToCSSPixels()).
|
|
*/
|
|
nsresult SetResolutionAndScaleTo(float aResolution,
|
|
ResolutionChangeOrigin aOrigin);
|
|
|
|
// Widget notificiations
|
|
void WindowSizeMoveDone();
|
|
|
|
void ThemeChanged(widget::ThemeChangeKind aChangeKind) {
|
|
mPresContext->ThemeChanged(aChangeKind);
|
|
}
|
|
|
|
void BackingScaleFactorChanged() { mPresContext->UIResolutionChangedSync(); }
|
|
|
|
MOZ_CAN_RUN_SCRIPT
|
|
void Paint(nsView* aViewToPaint, const nsRegion& aDirtyRegion,
|
|
PaintFlags aFlags);
|
|
|
|
/**
|
|
* Notify that we're going to call Paint with PaintFlags::PaintLayers
|
|
* on the pres shell for a widget (which might not be this one, since
|
|
* WillPaint is called on all presshells in the same toplevel window as the
|
|
* painted widget). This is issued at a time when it's safe to modify
|
|
* widget geometry.
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT void WillPaint();
|
|
|
|
/**
|
|
* Ensures that the refresh driver is running, and schedules a view
|
|
* manager flush on the next tick.
|
|
*
|
|
* @param aType PaintType::DelayedCompress : Schedule a paint to be executed
|
|
* after a delay, and put FrameLayerBuilder in 'compressed' mode that avoids
|
|
* short cut optimizations.
|
|
*/
|
|
void ScheduleViewManagerFlush(PaintType aType = PaintType::Default);
|
|
|
|
// caret handling
|
|
NS_IMETHOD SetCaretEnabled(bool aInEnable) override;
|
|
NS_IMETHOD SetCaretReadOnly(bool aReadOnly) override;
|
|
NS_IMETHOD GetCaretEnabled(bool* aOutEnabled) override;
|
|
NS_IMETHOD SetCaretVisibilityDuringSelection(bool aVisibility) override;
|
|
NS_IMETHOD GetCaretVisible(bool* _retval) override;
|
|
|
|
/**
|
|
* Should the images have borders etc. Actual visual effects are determined
|
|
* by the frames. Visual effects may not effect layout, only display.
|
|
* Takes effect on next repaint, does not force a repaint itself.
|
|
*
|
|
* @param aFlags may be multiple of nsISelectionDisplay::DISPLAY_*.
|
|
*/
|
|
NS_IMETHOD SetSelectionFlags(int16_t aFlags) override;
|
|
NS_IMETHOD GetSelectionFlags(int16_t* aFlags) override;
|
|
|
|
/**
|
|
* Gets the current state of non text selection effects
|
|
* @return current state of non text selection,
|
|
* as set by SetDisplayNonTextSelection
|
|
*/
|
|
int16_t GetSelectionFlags() const { return mSelectionFlags; }
|
|
|
|
// nsISelectionController
|
|
|
|
NS_IMETHOD PhysicalMove(int16_t aDirection, int16_t aAmount,
|
|
bool aExtend) override;
|
|
NS_IMETHOD CharacterMove(bool aForward, bool aExtend) override;
|
|
MOZ_CAN_RUN_SCRIPT_BOUNDARY NS_IMETHOD WordMove(bool aForward,
|
|
bool aExtend) override;
|
|
MOZ_CAN_RUN_SCRIPT_BOUNDARY NS_IMETHOD LineMove(bool aForward,
|
|
bool aExtend) override;
|
|
NS_IMETHOD IntraLineMove(bool aForward, bool aExtend) override;
|
|
MOZ_CAN_RUN_SCRIPT
|
|
NS_IMETHOD PageMove(bool aForward, bool aExtend) override;
|
|
NS_IMETHOD ScrollPage(bool aForward) override;
|
|
NS_IMETHOD ScrollLine(bool aForward) override;
|
|
NS_IMETHOD ScrollCharacter(bool aRight) override;
|
|
NS_IMETHOD CompleteScroll(bool aForward) override;
|
|
MOZ_CAN_RUN_SCRIPT NS_IMETHOD CompleteMove(bool aForward,
|
|
bool aExtend) override;
|
|
NS_IMETHOD CheckVisibility(nsINode* node, int16_t startOffset,
|
|
int16_t EndOffset, bool* _retval) override;
|
|
nsresult CheckVisibilityContent(nsIContent* aNode, int16_t aStartOffset,
|
|
int16_t aEndOffset, bool* aRetval) override;
|
|
|
|
// Notifies that the state of the document has changed.
|
|
void DocumentStatesChanged(EventStates);
|
|
|
|
// nsIDocumentObserver
|
|
NS_DECL_NSIDOCUMENTOBSERVER_BEGINLOAD
|
|
NS_DECL_NSIDOCUMENTOBSERVER_ENDLOAD
|
|
NS_DECL_NSIDOCUMENTOBSERVER_CONTENTSTATECHANGED
|
|
|
|
// 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
|
|
|
|
// Inline methods defined in PresShellInlines.h
|
|
inline void EnsureStyleFlush();
|
|
inline void SetNeedStyleFlush();
|
|
inline void SetNeedLayoutFlush();
|
|
inline void SetNeedThrottledAnimationFlush();
|
|
inline ServoStyleSet* StyleSet() const;
|
|
|
|
/**
|
|
* Whether we might need a flush for the given flush type. If this
|
|
* function returns false, we definitely don't need to flush.
|
|
*
|
|
* @param aFlushType The flush type to check. This must be
|
|
* >= FlushType::Style. This also returns true if a throttled
|
|
* animation flush is required.
|
|
*/
|
|
bool NeedFlush(FlushType aType) const {
|
|
// We check mInFlush to handle re-entrant calls to FlushPendingNotifications
|
|
// by reporting that we always need a flush in that case. Otherwise,
|
|
// we could end up missing needed flushes, since we clear the mNeedXXXFlush
|
|
// flags at the top of FlushPendingNotifications.
|
|
MOZ_ASSERT(aType >= FlushType::Style);
|
|
return mNeedStyleFlush ||
|
|
(mNeedLayoutFlush && aType >= FlushType::InterruptibleLayout) ||
|
|
aType >= FlushType::Display || mNeedThrottledAnimationFlush ||
|
|
mInFlush;
|
|
}
|
|
|
|
/**
|
|
* Returns true if we might need to flush layout, even if we haven't scheduled
|
|
* one yet (as opposed to HasPendingReflow, which returns true if a flush is
|
|
* scheduled or will soon be scheduled).
|
|
*/
|
|
bool NeedLayoutFlush() const { return mNeedLayoutFlush; }
|
|
|
|
bool NeedStyleFlush() const { return mNeedStyleFlush; }
|
|
|
|
/**
|
|
* Flush pending notifications of the type specified. This method
|
|
* will not affect the content model; it'll just affect style and
|
|
* frames. Callers that actually want up-to-date presentation (other
|
|
* than the document itself) should probably be calling
|
|
* Document::FlushPendingNotifications.
|
|
*
|
|
* This method can execute script, which can destroy this presshell object
|
|
* unless someone is holding a reference to it on the stack. The presshell
|
|
* itself will ensure it lives up until the method returns, but callers who
|
|
* plan to use the presshell after this call should hold a strong ref
|
|
* themselves!
|
|
*
|
|
* @param aType the type of notifications to flush
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT
|
|
void FlushPendingNotifications(FlushType aType) {
|
|
if (!NeedFlush(aType)) {
|
|
return;
|
|
}
|
|
|
|
DoFlushPendingNotifications(aType);
|
|
}
|
|
|
|
MOZ_CAN_RUN_SCRIPT
|
|
void FlushPendingNotifications(ChangesToFlush aType) {
|
|
if (!NeedFlush(aType.mFlushType)) {
|
|
return;
|
|
}
|
|
|
|
DoFlushPendingNotifications(aType);
|
|
}
|
|
|
|
/**
|
|
* Tell the pres shell that a frame needs to be marked dirty and needs
|
|
* Reflow. It's OK if this is an ancestor of the frame needing reflow as
|
|
* long as the ancestor chain between them doesn't cross a reflow root.
|
|
*
|
|
* The bit to add should be NS_FRAME_IS_DIRTY, NS_FRAME_HAS_DIRTY_CHILDREN
|
|
* or nsFrameState(0); passing 0 means that dirty bits won't be set on the
|
|
* frame or its ancestors/descendants, but that intrinsic widths will still
|
|
* be marked dirty. Passing aIntrinsicDirty = eResize and aBitToAdd = 0
|
|
* would result in no work being done, so don't do that.
|
|
*/
|
|
void FrameNeedsReflow(
|
|
nsIFrame* aFrame, IntrinsicDirty aIntrinsicDirty, nsFrameState aBitToAdd,
|
|
ReflowRootHandling aRootHandling = ReflowRootHandling::InferFromBitToAdd);
|
|
|
|
/**
|
|
* Calls FrameNeedsReflow on all fixed position children of the root frame.
|
|
*/
|
|
void MarkFixedFramesForReflow(IntrinsicDirty aIntrinsicDirty);
|
|
|
|
void MaybeReflowForInflationScreenSizeChange();
|
|
|
|
// This function handles all the work after VisualViewportSize is set
|
|
// or reset.
|
|
void CompleteChangeToVisualViewportSize();
|
|
|
|
/**
|
|
* The return value indicates whether the offset actually changed.
|
|
*/
|
|
bool SetVisualViewportOffset(const nsPoint& aScrollOffset,
|
|
const nsPoint& aPrevLayoutScrollPos);
|
|
|
|
nsPoint GetVisualViewportOffset() const {
|
|
return mVisualViewportOffset.valueOr(nsPoint());
|
|
}
|
|
bool IsVisualViewportOffsetSet() const {
|
|
return mVisualViewportOffset.isSome();
|
|
}
|
|
|
|
void SetVisualViewportSize(nscoord aWidth, nscoord aHeight);
|
|
void ResetVisualViewportSize();
|
|
bool IsVisualViewportSizeSet() { return mVisualViewportSizeSet; }
|
|
nsSize GetVisualViewportSize() {
|
|
NS_ASSERTION(mVisualViewportSizeSet,
|
|
"asking for visual viewport size when its not set?");
|
|
return mVisualViewportSize;
|
|
}
|
|
|
|
nsPoint GetVisualViewportOffsetRelativeToLayoutViewport() const;
|
|
|
|
// Returns state of the dynamic toolbar.
|
|
DynamicToolbarState GetDynamicToolbarState() const {
|
|
if (!mPresContext) {
|
|
return DynamicToolbarState::None;
|
|
}
|
|
|
|
return mPresContext->GetDynamicToolbarState();
|
|
}
|
|
// Returns the visual viewport size during the dynamic toolbar is being
|
|
// shown/hidden.
|
|
nsSize GetVisualViewportSizeUpdatedByDynamicToolbar() const;
|
|
|
|
/* Enable/disable author style level. Disabling author style disables the
|
|
* entire author level of the cascade, including the HTML preshint level.
|
|
*/
|
|
// XXX these could easily be inlined, but there is a circular #include
|
|
// problem with nsStyleSet.
|
|
void SetAuthorStyleDisabled(bool aDisabled);
|
|
bool GetAuthorStyleDisabled() const;
|
|
|
|
/**
|
|
* Update the style set somehow to take into account changed prefs which
|
|
* affect document styling.
|
|
*/
|
|
void UpdatePreferenceStyles();
|
|
|
|
// aSheetType is one of the nsIStyleSheetService *_SHEET constants.
|
|
void NotifyStyleSheetServiceSheetAdded(StyleSheet* aSheet,
|
|
uint32_t aSheetType);
|
|
void NotifyStyleSheetServiceSheetRemoved(StyleSheet* aSheet,
|
|
uint32_t aSheetType);
|
|
|
|
// DoReflow returns whether the reflow finished without interruption
|
|
// If aFrame is not the root frame, the caller must pass a non-null
|
|
// aOverflowTracker.
|
|
bool DoReflow(nsIFrame* aFrame, bool aInterruptible,
|
|
OverflowChangedTracker* aOverflowTracker);
|
|
|
|
/**
|
|
* Add a solid color item to the bottom of aList with frame aFrame and bounds
|
|
* aBounds. Checks first if this needs to be done by checking if aFrame is a
|
|
* canvas frame (if the AddCanvasBackgroundColorFlags::ForceDraw is passed
|
|
* then this check is skipped). aBackstopColor is composed behind the
|
|
* background color of the canvas, it is transparent by default.
|
|
*
|
|
* We attempt to make the background color part of the scrolled canvas (to
|
|
* reduce transparent layers), and if async scrolling is enabled (and the
|
|
* background is opaque) then we add a second, unscrolled item to handle the
|
|
* checkerboarding case.
|
|
*
|
|
* AddCanvasBackgroundColorFlags::AddSubDocument should be specified when
|
|
* calling this for a subdocument, and LayoutUseContainersForRootFrame might
|
|
* cause the whole list to be scrolled. In that case the second unscrolled
|
|
* item will be elided.
|
|
*
|
|
* AddCanvasBackgroundColorFlags::AppendUnscrolledOnly only attempts to add
|
|
* the unscrolled item, so that we can add it manually after
|
|
* LayoutUseContainersForRootFrame has built the scrolling ContainerLayer.
|
|
*/
|
|
void AddCanvasBackgroundColorItem(
|
|
nsDisplayListBuilder* aBuilder, nsDisplayList* aList, nsIFrame* aFrame,
|
|
const nsRect& aBounds, nscolor aBackstopColor = NS_RGBA(0, 0, 0, 0),
|
|
AddCanvasBackgroundColorFlags aFlags =
|
|
AddCanvasBackgroundColorFlags::None);
|
|
|
|
size_t SizeOfTextRuns(MallocSizeOf aMallocSizeOf) const;
|
|
|
|
void SetNextPaintCompressed() { mNextPaintCompressed = true; }
|
|
|
|
static PresShell* GetShellForEventTarget(nsIFrame* aFrame,
|
|
nsIContent* aContent);
|
|
static PresShell* GetShellForTouchEvent(WidgetGUIEvent* aEvent);
|
|
|
|
/**
|
|
* Informs the pres shell that the document is now at the anchor with
|
|
* the given name. If |aScroll| is true, scrolls the view of the
|
|
* document so that the anchor with the specified name is displayed at
|
|
* the top of the window. If |aAnchorName| is empty, then this informs
|
|
* the pres shell that there is no current target, and |aScroll| must
|
|
* be false. If |aAdditionalScrollFlags| is ScrollFlags::ScrollSmoothAuto
|
|
* and |aScroll| is true, the scrolling may be performed with an animation.
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT
|
|
nsresult GoToAnchor(const nsAString& aAnchorName, bool aScroll,
|
|
ScrollFlags aAdditionalScrollFlags = ScrollFlags::None);
|
|
|
|
/**
|
|
* Tells the presshell to scroll again to the last anchor scrolled to by
|
|
* GoToAnchor, if any. This scroll only happens if the scroll
|
|
* position has not changed since the last GoToAnchor (modulo scroll anchoring
|
|
* adjustments). This is called by nsDocumentViewer::LoadComplete. This clears
|
|
* the last anchor scrolled to by GoToAnchor (we don't want to keep it alive
|
|
* if it's removed from the DOM), so don't call this more than once.
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT nsresult ScrollToAnchor();
|
|
|
|
/**
|
|
* When scroll anchoring adjusts positions in the root frame during page load,
|
|
* it may move our scroll position in the root frame.
|
|
*
|
|
* While that's generally desirable, when scrolling to an anchor via an id-ref
|
|
* we have a more direct target. If the id-ref points to something that cannot
|
|
* be selected as a scroll anchor container (like an image or an inline), we
|
|
* may select a node following it as a scroll anchor, and if then stuff is
|
|
* inserted on top, we may end up moving the id-ref element offscreen to the
|
|
* top inadvertently.
|
|
*
|
|
* On page load, the document viewer will call ScrollToAnchor(), and will only
|
|
* scroll to the anchor again if the scroll position is not changed. We don't
|
|
* want scroll anchoring adjustments to prevent this, so account for them.
|
|
*/
|
|
void RootScrollFrameAdjusted(nscoord aYAdjustment) {
|
|
if (mLastAnchorScrolledTo) {
|
|
mLastAnchorScrollPositionY += aYAdjustment;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Scrolls the view of the document so that the primary frame of the content
|
|
* is displayed in the window. Layout is flushed before scrolling.
|
|
*
|
|
* @param aContent The content object of which primary frame should be
|
|
* scrolled into view.
|
|
* @param aVertical How to align the frame vertically and when to do so.
|
|
* This is a ScrollAxis of Where and When.
|
|
* @param aHorizontal How to align the frame horizontally and when to do so.
|
|
* This is a ScrollAxis of Where and When.
|
|
* @param aScrollFlags If ScrollFlags::ScrollFirstAncestorOnly is set,
|
|
* only the nearest scrollable ancestor is scrolled,
|
|
* otherwise all scrollable ancestors may be scrolled
|
|
* if necessary. If ScrollFlags::ScrollOverflowHidden
|
|
* is set then we may scroll in a direction even if
|
|
* overflow:hidden is specified in that direction;
|
|
* otherwise we will not scroll in that direction when
|
|
* overflow:hidden is set for that direction. If
|
|
* ScrollFlags::ScrollNoParentFrames is set then we
|
|
* only scroll nodes in this document, not in any
|
|
* parent documents which contain this document in a
|
|
* iframe or the like. If ScrollFlags::ScrollSmooth
|
|
* is set and CSSOM-VIEW scroll-behavior is enabled,
|
|
* we will scroll smoothly using
|
|
* nsIScrollableFrame::ScrollMode::SMOOTH_MSD;
|
|
* otherwise, nsIScrollableFrame::ScrollMode::INSTANT
|
|
* will be used. If ScrollFlags::ScrollSmoothAuto is
|
|
* set, the CSSOM-View scroll-behavior attribute is
|
|
* set to 'smooth' on the scroll frame, and CSSOM-VIEW
|
|
* scroll-behavior is enabled, we will scroll smoothly
|
|
* using nsIScrollableFrame::ScrollMode::SMOOTH_MSD;
|
|
* otherwise, nsIScrollableFrame::ScrollMode::INSTANT
|
|
* will be used.
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT
|
|
nsresult ScrollContentIntoView(nsIContent* aContent, ScrollAxis aVertical,
|
|
ScrollAxis aHorizontal,
|
|
ScrollFlags aScrollFlags);
|
|
|
|
/**
|
|
* When capturing content is set, it traps all mouse events and retargets
|
|
* them at this content node. If capturing is not allowed
|
|
* (gCaptureInfo.mAllowed is false), then capturing is not set. However, if
|
|
* the CaptureFlags::IgnoreAllowedState is set, the allowed state is ignored
|
|
* and capturing is set regardless. To disable capture, pass null for the
|
|
* value of aContent.
|
|
*
|
|
* If CaptureFlags::RetargetedToElement is set, all mouse events are
|
|
* targeted at aContent only. Otherwise, mouse events are targeted at
|
|
* aContent or its descendants. That is, descendants of aContent receive
|
|
* mouse events as they normally would, but mouse events outside of aContent
|
|
* are retargeted to aContent.
|
|
*
|
|
* If CaptureFlags::PreventDragStart is set then drags are prevented from
|
|
* starting while this capture is active.
|
|
*
|
|
* If CaptureFlags::PointerLock is set, similar to
|
|
* CaptureFlags::RetargetToElement, then events are targeted at aContent,
|
|
* but capturing is held more strongly (i.e., calls to SetCapturingContent()
|
|
* won't unlock unless CaptureFlags::PointerLock is set again).
|
|
*/
|
|
static void SetCapturingContent(nsIContent* aContent, CaptureFlags aFlags,
|
|
WidgetEvent* aEvent = nullptr);
|
|
|
|
/**
|
|
* Alias for SetCapturingContent(nullptr, CaptureFlags::None) for making
|
|
* callers what they do clearer.
|
|
*/
|
|
static void ReleaseCapturingContent() {
|
|
PresShell::SetCapturingContent(nullptr, CaptureFlags::None);
|
|
}
|
|
|
|
static void ReleaseCapturingRemoteTarget(dom::BrowserParent* aBrowserParent) {
|
|
MOZ_ASSERT(XRE_IsParentProcess());
|
|
if (sCapturingContentInfo.mRemoteTarget == aBrowserParent) {
|
|
sCapturingContentInfo.mRemoteTarget = nullptr;
|
|
}
|
|
}
|
|
|
|
// Called at the end of nsLayoutUtils::PaintFrame() if we were painting to
|
|
// the widget.
|
|
// This is used to clear any pending visual scroll updates that have been
|
|
// acknowledged, to make sure they don't stick around for the next paint.
|
|
void EndPaint();
|
|
|
|
/**
|
|
* Tell the presshell that the given frame's reflow was interrupted. This
|
|
* will mark as having dirty children a path from the given frame (inclusive)
|
|
* to the nearest ancestor with a dirty subtree, or to the reflow root
|
|
* currently being reflowed if no such ancestor exists (inclusive). This is
|
|
* to be done immediately after reflow of the current reflow root completes.
|
|
* This method must only be called during reflow, and the frame it's being
|
|
* called on must be in the process of being reflowed when it's called. This
|
|
* method doesn't mark any intrinsic widths dirty and doesn't add any bits
|
|
* other than NS_FRAME_HAS_DIRTY_CHILDREN.
|
|
*/
|
|
void FrameNeedsToContinueReflow(nsIFrame* aFrame);
|
|
|
|
/**
|
|
* Notification sent by a frame informing the pres shell that it is about to
|
|
* be destroyed.
|
|
* This allows any outstanding references to the frame to be cleaned up
|
|
*/
|
|
void NotifyDestroyingFrame(nsIFrame* aFrame);
|
|
|
|
#ifdef DEBUG
|
|
nsIFrame* GetDrawEventTargetFrame() { return mDrawEventTargetFrame; }
|
|
#endif
|
|
|
|
bool GetZoomableByAPZ() const;
|
|
|
|
private:
|
|
~PresShell();
|
|
|
|
/**
|
|
* Refresh observer management.
|
|
*/
|
|
void DoObserveStyleFlushes();
|
|
void DoObserveLayoutFlushes();
|
|
|
|
/**
|
|
* Does the actual work of figuring out the current state of font size
|
|
* inflation.
|
|
*/
|
|
bool DetermineFontSizeInflationState();
|
|
|
|
void RecordAlloc(void* aPtr) {
|
|
#ifdef MOZ_DIAGNOSTIC_ASSERT_ENABLED
|
|
MOZ_DIAGNOSTIC_ASSERT(!mAllocatedPointers.Contains(aPtr));
|
|
mAllocatedPointers.Insert(aPtr);
|
|
#endif
|
|
}
|
|
|
|
void RecordFree(void* aPtr) {
|
|
#ifdef MOZ_DIAGNOSTIC_ASSERT_ENABLED
|
|
MOZ_DIAGNOSTIC_ASSERT(mAllocatedPointers.Contains(aPtr));
|
|
mAllocatedPointers.Remove(aPtr);
|
|
#endif
|
|
}
|
|
|
|
void PushCurrentEventInfo(nsIFrame* aFrame, nsIContent* aContent);
|
|
void PopCurrentEventInfo();
|
|
nsIContent* GetCurrentEventContent();
|
|
|
|
friend class ::nsRefreshDriver;
|
|
friend class ::nsAutoCauseReflowNotifier;
|
|
|
|
void WillCauseReflow();
|
|
MOZ_CAN_RUN_SCRIPT void DidCauseReflow();
|
|
|
|
void CancelPostedReflowCallbacks();
|
|
void FlushPendingScrollAnchorAdjustments();
|
|
|
|
void SetPendingVisualScrollUpdate(
|
|
const nsPoint& aVisualViewportOffset,
|
|
FrameMetrics::ScrollOffsetUpdateType aUpdateType);
|
|
|
|
#ifdef MOZ_REFLOW_PERF
|
|
UniquePtr<ReflowCountMgr> mReflowCountMgr;
|
|
#endif
|
|
|
|
void WillDoReflow();
|
|
|
|
// This data is stored as a content property (nsGkAtoms::scrolling) on
|
|
// mContentToScrollTo when we have a pending ScrollIntoView.
|
|
struct ScrollIntoViewData {
|
|
ScrollAxis mContentScrollVAxis;
|
|
ScrollAxis mContentScrollHAxis;
|
|
ScrollFlags mContentToScrollToFlags;
|
|
};
|
|
|
|
static LazyLogModule gLog;
|
|
|
|
DOMHighResTimeStamp GetPerformanceNowUnclamped();
|
|
|
|
// The callback for the mReflowContinueTimer timer.
|
|
static void sReflowContinueCallback(nsITimer* aTimer, void* aPresShell);
|
|
bool ScheduleReflowOffTimer();
|
|
// 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();
|
|
|
|
friend class ::AutoPointerEventTargetUpdater;
|
|
|
|
// ProcessReflowCommands returns whether we processed all our dirty roots
|
|
// without interruptions.
|
|
MOZ_CAN_RUN_SCRIPT bool ProcessReflowCommands(bool aInterruptible);
|
|
|
|
/**
|
|
* Callback handler for whether reflow happened.
|
|
*
|
|
* @param aInterruptible Whether or not reflow interruption is allowed.
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT void DidDoReflow(bool aInterruptible);
|
|
|
|
MOZ_CAN_RUN_SCRIPT void HandlePostedReflowCallbacks(bool aInterruptible);
|
|
|
|
/**
|
|
* Helper for ScrollContentIntoView()
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT void DoScrollContentIntoView();
|
|
|
|
/**
|
|
* Methods to handle changes to user and UA sheet lists that we get
|
|
* notified about.
|
|
*/
|
|
void AddUserSheet(StyleSheet*);
|
|
void AddAgentSheet(StyleSheet*);
|
|
void AddAuthorSheet(StyleSheet*);
|
|
void RemovePreferenceStyles();
|
|
|
|
/**
|
|
* Initialize cached font inflation preference values and do an initial
|
|
* computation to determine if font inflation is enabled.
|
|
*
|
|
* @see nsLayoutUtils::sFontSizeInflationEmPerLine
|
|
* @see nsLayoutUtils::sFontSizeInflationMinTwips
|
|
* @see nsLayoutUtils::sFontSizeInflationLineThreshold
|
|
*/
|
|
void SetupFontInflation();
|
|
|
|
/**
|
|
* Implementation methods for FlushPendingNotifications.
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT void DoFlushPendingNotifications(FlushType aType);
|
|
MOZ_CAN_RUN_SCRIPT void DoFlushPendingNotifications(ChangesToFlush aType);
|
|
|
|
struct RenderingState {
|
|
explicit RenderingState(PresShell* aPresShell)
|
|
: mResolution(aPresShell->mResolution),
|
|
mRenderingStateFlags(aPresShell->mRenderingStateFlags) {}
|
|
Maybe<float> mResolution;
|
|
RenderingStateFlags mRenderingStateFlags;
|
|
};
|
|
|
|
struct AutoSaveRestoreRenderingState {
|
|
explicit AutoSaveRestoreRenderingState(PresShell* aPresShell)
|
|
: mPresShell(aPresShell), mOldState(aPresShell) {}
|
|
|
|
~AutoSaveRestoreRenderingState() {
|
|
mPresShell->mRenderingStateFlags = mOldState.mRenderingStateFlags;
|
|
mPresShell->mResolution = mOldState.mResolution;
|
|
}
|
|
|
|
PresShell* mPresShell;
|
|
RenderingState mOldState;
|
|
};
|
|
void SetRenderingState(const RenderingState& aState);
|
|
|
|
friend class ::nsPresShellEventCB;
|
|
|
|
// 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
|
|
UniquePtr<RangePaintInfo> CreateRangePaintInfo(nsRange* 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
|
|
* aFlags - set RenderImageFlags::AutoScale to scale down large images, but
|
|
* it must not be set if a custom image was specified
|
|
*/
|
|
already_AddRefed<SourceSurface> PaintRangePaintInfo(
|
|
const nsTArray<UniquePtr<RangePaintInfo>>& aItems,
|
|
dom::Selection* aSelection, const Maybe<CSSIntRegion>& aRegion,
|
|
nsRect aArea, const LayoutDeviceIntPoint aPoint,
|
|
LayoutDeviceIntRect* aScreenRect, RenderImageFlags aFlags);
|
|
|
|
// Hide a view if it is a popup
|
|
void HideViewIfPopup(nsView* aView);
|
|
|
|
// Utility method to restore the root scrollframe state
|
|
void RestoreRootScrollPosition();
|
|
|
|
MOZ_CAN_RUN_SCRIPT_BOUNDARY void MaybeReleaseCapturingContent();
|
|
|
|
class DelayedEvent {
|
|
public:
|
|
virtual ~DelayedEvent() = default;
|
|
virtual void Dispatch() {}
|
|
virtual bool IsKeyPressEvent() { return false; }
|
|
};
|
|
|
|
class DelayedInputEvent : public DelayedEvent {
|
|
public:
|
|
void Dispatch() override;
|
|
|
|
protected:
|
|
DelayedInputEvent();
|
|
~DelayedInputEvent() override;
|
|
|
|
WidgetInputEvent* mEvent;
|
|
};
|
|
|
|
class DelayedMouseEvent : public DelayedInputEvent {
|
|
public:
|
|
explicit DelayedMouseEvent(WidgetMouseEvent* aEvent);
|
|
};
|
|
|
|
class DelayedKeyEvent : public DelayedInputEvent {
|
|
public:
|
|
explicit DelayedKeyEvent(WidgetKeyboardEvent* aEvent);
|
|
bool IsKeyPressEvent() override;
|
|
};
|
|
|
|
// Check if aEvent is a mouse event and record the mouse location for later
|
|
// synth mouse moves.
|
|
void RecordMouseLocation(WidgetGUIEvent* aEvent);
|
|
inline bool MouseLocationWasSetBySynthesizedMouseEventForTests() const;
|
|
class nsSynthMouseMoveEvent final : public nsARefreshObserver {
|
|
public:
|
|
nsSynthMouseMoveEvent(PresShell* aPresShell, bool aFromScroll)
|
|
: mPresShell(aPresShell), mFromScroll(aFromScroll) {
|
|
NS_ASSERTION(mPresShell, "null parameter");
|
|
}
|
|
|
|
private:
|
|
// Private destructor, to discourage deletion outside of Release():
|
|
~nsSynthMouseMoveEvent() { Revoke(); }
|
|
|
|
public:
|
|
NS_INLINE_DECL_REFCOUNTING(nsSynthMouseMoveEvent, override)
|
|
|
|
void Revoke();
|
|
|
|
MOZ_CAN_RUN_SCRIPT
|
|
void WillRefresh(TimeStamp aTime) override {
|
|
if (mPresShell) {
|
|
RefPtr<PresShell> shell = mPresShell;
|
|
shell->ProcessSynthMouseMoveEvent(mFromScroll);
|
|
}
|
|
}
|
|
|
|
private:
|
|
PresShell* mPresShell;
|
|
bool mFromScroll;
|
|
};
|
|
MOZ_CAN_RUN_SCRIPT void ProcessSynthMouseMoveEvent(bool aFromScroll);
|
|
|
|
void QueryIsActive();
|
|
nsresult UpdateImageLockingState();
|
|
|
|
already_AddRefed<PresShell> GetParentPresShellForEventHandling();
|
|
|
|
/**
|
|
* EventHandler is implementation of PresShell::HandleEvent().
|
|
*/
|
|
class MOZ_STACK_CLASS EventHandler final {
|
|
public:
|
|
EventHandler() = delete;
|
|
EventHandler(const EventHandler& aOther) = delete;
|
|
explicit EventHandler(PresShell& aPresShell)
|
|
: mPresShell(aPresShell), mCurrentEventInfoSetter(nullptr) {}
|
|
explicit EventHandler(RefPtr<PresShell>&& aPresShell)
|
|
: mPresShell(std::move(aPresShell)), mCurrentEventInfoSetter(nullptr) {}
|
|
|
|
/**
|
|
* HandleEvent() may dispatch aGUIEvent. This may redirect the event to
|
|
* another PresShell, or the event may be handled by other classes like
|
|
* AccessibleCaretEventHub, or discarded. Otherwise, this sets current
|
|
* event info of mPresShell and calls HandleEventWithCurrentEventInfo()
|
|
* to dispatch the event into the DOM tree.
|
|
*
|
|
* @param aFrameForPresShell The frame for PresShell. If PresShell
|
|
* has root frame, it should be set.
|
|
* Otherwise, a frame which contains the
|
|
* PresShell should be set instead. I.e.,
|
|
* in the latter case, the frame is in
|
|
* a parent document.
|
|
* @param aGUIEvent Event to be handled. Must be a trusted
|
|
* event.
|
|
* @param aDontRetargetEvents true if this shouldn't redirect the
|
|
* event to different PresShell.
|
|
* false if this can redirect the event to
|
|
* different PresShell.
|
|
* @param aEventStatus [in/out] EventStatus of aGUIEvent.
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT
|
|
nsresult HandleEvent(nsIFrame* aFrameForPresShell,
|
|
WidgetGUIEvent* aGUIEvent, bool aDontRetargetEvents,
|
|
nsEventStatus* aEventStatus);
|
|
|
|
/**
|
|
* HandleEventWithTarget() tries to dispatch aEvent on aContent after
|
|
* setting current event target content to aNewEventContent and current
|
|
* event frame to aNewEventFrame temporarily. Note that this supports
|
|
* WidgetEvent, not WidgetGUIEvent. So, you can dispatch a simple event
|
|
* with this.
|
|
*
|
|
* @param aEvent Event to be dispatched. Must be a
|
|
* trusted event.
|
|
* @param aNewEventFrame Temporal new event frame.
|
|
* @param aNewEventContent Temporal new event content.
|
|
* @param aEventStatus [in/out] EventStuatus of aEvent.
|
|
* @param aIsHandlingNativeEvent true if aEvent represents a native
|
|
* event.
|
|
* @param aTargetContent This is used only when aEvent is a
|
|
* pointer event. If
|
|
* PresShell::mPointerEventTarget is
|
|
* changed during dispatching aEvent,
|
|
* this is set to the new target.
|
|
* @param aOverrideClickTarget Override click event target.
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT
|
|
nsresult HandleEventWithTarget(WidgetEvent* aEvent,
|
|
nsIFrame* aNewEventFrame,
|
|
nsIContent* aNewEventContent,
|
|
nsEventStatus* aEventStatus,
|
|
bool aIsHandlingNativeEvent,
|
|
nsIContent** aTargetContent,
|
|
nsIContent* aOverrideClickTarget);
|
|
|
|
/**
|
|
* OnPresShellDestroy() is called when every PresShell instance is being
|
|
* destroyed.
|
|
*/
|
|
static inline void OnPresShellDestroy(Document* aDocument);
|
|
|
|
private:
|
|
static bool InZombieDocument(nsIContent* aContent);
|
|
static nsIFrame* GetNearestFrameContainingPresShell(PresShell* aPresShell);
|
|
static nsIPrincipal* GetDocumentPrincipalToCompareWithBlacklist(
|
|
PresShell& aPresShell);
|
|
|
|
/**
|
|
* HandleEventUsingCoordinates() handles aGUIEvent whose
|
|
* IsUsingCoordinates() returns true with the following helper methods.
|
|
*
|
|
* @param aFrameForPresShell The frame for PresShell. See
|
|
* explanation of HandleEvent() for the
|
|
* details.
|
|
* @param aGUIEvent The handling event. Make sure that
|
|
* its IsUsingCoordinates() returns true.
|
|
* @param aEventStatus The status of aGUIEvent.
|
|
* @param aDontRetargetEvents true if we've already retarget document.
|
|
* Otherwise, false.
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT
|
|
nsresult HandleEventUsingCoordinates(nsIFrame* aFrameForPresShell,
|
|
WidgetGUIEvent* aGUIEvent,
|
|
nsEventStatus* aEventStatus,
|
|
bool aDontRetargetEvents);
|
|
|
|
/**
|
|
* EventTargetData struct stores a set of a PresShell (event handler),
|
|
* a frame (to handle the event) and a content (event target for the frame).
|
|
*/
|
|
struct MOZ_STACK_CLASS EventTargetData final {
|
|
EventTargetData() = delete;
|
|
EventTargetData(const EventTargetData& aOther) = delete;
|
|
explicit EventTargetData(nsIFrame* aFrameToHandleEvent) {
|
|
SetFrameAndComputePresShell(aFrameToHandleEvent);
|
|
}
|
|
|
|
void SetFrameAndComputePresShell(nsIFrame* aFrameToHandleEvent);
|
|
void SetFrameAndComputePresShellAndContent(nsIFrame* aFrameToHandleEvent,
|
|
WidgetGUIEvent* aGUIEvent);
|
|
void SetContentForEventFromFrame(WidgetGUIEvent* aGUIEvent);
|
|
|
|
nsPresContext* GetPresContext() const {
|
|
return mPresShell ? mPresShell->GetPresContext() : nullptr;
|
|
};
|
|
EventStateManager* GetEventStateManager() const {
|
|
nsPresContext* presContext = GetPresContext();
|
|
return presContext ? presContext->EventStateManager() : nullptr;
|
|
}
|
|
Document* GetDocument() const {
|
|
return mPresShell ? mPresShell->GetDocument() : nullptr;
|
|
}
|
|
nsIContent* GetFrameContent() const;
|
|
|
|
/**
|
|
* MaybeRetargetToActiveDocument() tries retarget aGUIEvent into
|
|
* active document if there is. Note that this does not support to
|
|
* retarget mContent. Make sure it is nullptr before calling this.
|
|
*
|
|
* @param aGUIEvent The handling event.
|
|
* @return true if retargetted.
|
|
*/
|
|
bool MaybeRetargetToActiveDocument(WidgetGUIEvent* aGUIEvent);
|
|
|
|
/**
|
|
* ComputeElementFromFrame() computes mContent for aGUIEvent. If
|
|
* mContent is set by this method, mContent is always nullptr or an
|
|
* Element.
|
|
*
|
|
* @param aGUIEvent The handling event.
|
|
* @return true if caller can keep handling the event.
|
|
* Otherwise, false.
|
|
* Note that even if this returns true, mContent
|
|
* may be nullptr.
|
|
*/
|
|
bool ComputeElementFromFrame(WidgetGUIEvent* aGUIEvent);
|
|
|
|
/**
|
|
* UpdateTouchEventTarget() updates mFrame, mPresShell and mContent if
|
|
* aGUIEvent is a touch event and there is new proper target.
|
|
*
|
|
* @param aGUIEvent The handled event. If it's not a touch event,
|
|
* this method does nothing.
|
|
*/
|
|
void UpdateTouchEventTarget(WidgetGUIEvent* aGUIEvent);
|
|
|
|
RefPtr<PresShell> mPresShell;
|
|
nsIFrame* mFrame = nullptr;
|
|
nsCOMPtr<nsIContent> mContent;
|
|
nsCOMPtr<nsIContent> mOverrideClickTarget;
|
|
};
|
|
|
|
/**
|
|
* MaybeFlushPendingNotifications() maybe flush pending notifications if
|
|
* aGUIEvent should be handled with the latest layout.
|
|
*
|
|
* @param aGUIEvent The handling event.
|
|
* @return true if this actually flushes pending
|
|
* layout and that has caused changing the
|
|
* layout.
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT
|
|
bool MaybeFlushPendingNotifications(WidgetGUIEvent* aGUIEvent);
|
|
|
|
/**
|
|
* GetFrameToHandleNonTouchEvent() returns a frame to handle the event.
|
|
* This may flush pending layout if the target is in child PresShell.
|
|
*
|
|
* @param aRootFrameToHandleEvent The root frame to handle the event.
|
|
* @param aGUIEvent The handling event.
|
|
* @return The frame which should handle the
|
|
* event. nullptr if the caller should
|
|
* stop handling the event.
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT
|
|
nsIFrame* GetFrameToHandleNonTouchEvent(nsIFrame* aRootFrameToHandleEvent,
|
|
WidgetGUIEvent* aGUIEvent);
|
|
|
|
/**
|
|
* ComputeEventTargetFrameAndPresShellAtEventPoint() computes event
|
|
* target frame at the event point of aGUIEvent and set it to
|
|
* aEventTargetData.
|
|
*
|
|
* @param aRootFrameToHandleEvent The root frame to handle aGUIEvent.
|
|
* @param aGUIEvent The handling event.
|
|
* @param aEventTargetData [out] Its frame and PresShell will
|
|
* be set.
|
|
* @return true if the caller can handle the
|
|
* event. Otherwise, false.
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT
|
|
bool ComputeEventTargetFrameAndPresShellAtEventPoint(
|
|
nsIFrame* aRootFrameToHandleEvent, WidgetGUIEvent* aGUIEvent,
|
|
EventTargetData* aEventTargetData);
|
|
|
|
/**
|
|
* DispatchPrecedingPointerEvent() dispatches preceding pointer event for
|
|
* aGUIEvent if Pointer Events is enabled.
|
|
*
|
|
* @param aFrameForPresShell The frame for PresShell. See
|
|
* explanation of HandleEvent() for the
|
|
* details.
|
|
* @param aGUIEvent The handled event.
|
|
* @param aPointerCapturingContent The content which is capturing pointer
|
|
* events if there is. Otherwise, nullptr.
|
|
* @param aDontRetargetEvents Set aDontRetargetEvents of
|
|
* HandleEvent() which called this method.
|
|
* @param aEventTargetData [in/out] Event target data of
|
|
* aGUIEvent. If pointer event listeners
|
|
* change the DOM tree or reframe the
|
|
* target, updated by this method.
|
|
* @param aEventStatus [in/out] The event status of aGUIEvent.
|
|
* @return true if the caller can handle the
|
|
* event. Otherwise, false.
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT
|
|
bool DispatchPrecedingPointerEvent(nsIFrame* aFrameForPresShell,
|
|
WidgetGUIEvent* aGUIEvent,
|
|
nsIContent* aPointerCapturingContent,
|
|
bool aDontRetargetEvents,
|
|
EventTargetData* aEventTargetData,
|
|
nsEventStatus* aEventStatus);
|
|
|
|
/**
|
|
* MaybeDiscardEvent() checks whether it's safe to handle aGUIEvent right
|
|
* now. If it's not safe, this may notify somebody of discarding event if
|
|
* necessary.
|
|
*
|
|
* @param aGUIEvent Handling event.
|
|
* @return true if it's not safe to handle the event.
|
|
*/
|
|
bool MaybeDiscardEvent(WidgetGUIEvent* aGUIEvent);
|
|
|
|
/**
|
|
* GetCapturingContentFor() returns capturing content for aGUIEvent.
|
|
* If aGUIEvent is not related to capturing, this returns nullptr.
|
|
*/
|
|
static nsIContent* GetCapturingContentFor(WidgetGUIEvent* aGUIEvent);
|
|
|
|
/**
|
|
* GetRetargetEventDocument() returns a document if aGUIEvent should be
|
|
* handled in another document.
|
|
*
|
|
* @param aGUIEvent Handling event.
|
|
* @param aRetargetEventDocument Document which should handle aGUIEvent.
|
|
* @return true if caller can keep handling
|
|
* aGUIEvent.
|
|
*/
|
|
bool GetRetargetEventDocument(WidgetGUIEvent* aGUIEvent,
|
|
Document** aRetargetEventDocument);
|
|
|
|
/**
|
|
* GetFrameForHandlingEventWith() returns a frame which should be used as
|
|
* aFrameForPresShell of HandleEvent(). See @return for the details.
|
|
*
|
|
* @param aGUIEvent Handling event.
|
|
* @param aRetargetDocument Document which aGUIEvent should be
|
|
* fired on. Typically, should be result
|
|
* of GetRetargetEventDocument().
|
|
* @param aFrameForPresShell The frame for PresShell. See
|
|
* explanation of HandleEvent() for the
|
|
* details.
|
|
* @return nullptr if caller should stop handling
|
|
* the event.
|
|
* aFrameForPresShell if caller should
|
|
* keep handling the event by itself.
|
|
* Otherwise, caller should handle it with
|
|
* another PresShell which is result of
|
|
* nsIFrame::PresContext()->GetPresShell().
|
|
*/
|
|
nsIFrame* GetFrameForHandlingEventWith(WidgetGUIEvent* aGUIEvent,
|
|
Document* aRetargetDocument,
|
|
nsIFrame* aFrameForPresShell);
|
|
|
|
/**
|
|
* MaybeHandleEventWithAnotherPresShell() may handle aGUIEvent with another
|
|
* PresShell.
|
|
*
|
|
* @param aFrameForPresShell The frame for PresShell. See
|
|
* explanation of HandleEvent() for the
|
|
* details.
|
|
* @param aGUIEvent Handling event.
|
|
* @param aEventStatus [in/out] EventStatus of aGUIEvent.
|
|
* @param aRv [out] Returns error if this gets an
|
|
* error handling the event.
|
|
* @return false if caller needs to keep handling
|
|
* the event by itself.
|
|
* true if caller shouldn't keep handling
|
|
* the event. Note that when no PresShell
|
|
* can handle the event, this returns true.
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT
|
|
bool MaybeHandleEventWithAnotherPresShell(nsIFrame* aFrameForPresShell,
|
|
WidgetGUIEvent* aGUIEvent,
|
|
nsEventStatus* aEventStatus,
|
|
nsresult* aRv);
|
|
|
|
MOZ_CAN_RUN_SCRIPT
|
|
nsresult RetargetEventToParent(WidgetGUIEvent* aGUIEvent,
|
|
nsEventStatus* aEventStatus);
|
|
|
|
/**
|
|
* MaybeHandleEventWithAccessibleCaret() may handle aGUIEvent with
|
|
* AccessibleCaretEventHub if it's necessary.
|
|
*
|
|
* @param aFrameForPresShell The frame for PresShell. See explanation of
|
|
* HandleEvent() for the details.
|
|
* @param aGUIEvent Event may be handled by AccessibleCaretEventHub.
|
|
* @param aEventStatus [in/out] EventStatus of aGUIEvent.
|
|
* @return true if AccessibleCaretEventHub handled the
|
|
* event and caller shouldn't keep handling it.
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT
|
|
bool MaybeHandleEventWithAccessibleCaret(nsIFrame* aFrameForPresShell,
|
|
WidgetGUIEvent* aGUIEvent,
|
|
nsEventStatus* aEventStatus);
|
|
|
|
/**
|
|
* MaybeDiscardOrDelayKeyboardEvent() may discared or put aGUIEvent into
|
|
* the delayed event queue if it's a keyboard event and if we should do so.
|
|
* If aGUIEvent is not a keyboard event, this does nothing.
|
|
*
|
|
* @param aGUIEvent The handling event.
|
|
* @return true if this method discard the event or
|
|
* put it into the delayed event queue.
|
|
*/
|
|
bool MaybeDiscardOrDelayKeyboardEvent(WidgetGUIEvent* aGUIEvent);
|
|
|
|
/**
|
|
* MaybeDiscardOrDelayMouseEvent() may discard or put aGUIEvent into the
|
|
* delayed event queue if it's a mouse event and if we should do so.
|
|
* If aGUIEvent is not a mouse event, this does nothing.
|
|
* If there is suppressed event listener like debugger of devtools, this
|
|
* notifies it of the event after discard or put it into the delayed
|
|
* event queue.
|
|
*
|
|
* @param aFrameToHandleEvent The frame to handle aGUIEvent.
|
|
* @param aGUIEvent The handling event.
|
|
* @return true if this method discard the event
|
|
* or put it into the delayed event queue.
|
|
*/
|
|
bool MaybeDiscardOrDelayMouseEvent(nsIFrame* aFrameToHandleEvent,
|
|
WidgetGUIEvent* aGUIEvent);
|
|
|
|
/**
|
|
* MaybeFlushThrottledStyles() tries to flush pending animation. If it's
|
|
* flushed and then aFrameForPresShell is destroyed, returns new frame
|
|
* which contains mPresShell.
|
|
*
|
|
* @param aFrameForPresShell The frame for PresShell. See
|
|
* explanation of HandleEvent() for the
|
|
* details. This can be nullptr.
|
|
* @return Maybe new frame for mPresShell.
|
|
* If aFrameForPresShell is not nullptr
|
|
* and hasn't been destroyed, returns
|
|
* aFrameForPresShell as-is.
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT
|
|
nsIFrame* MaybeFlushThrottledStyles(nsIFrame* aFrameForPresShell);
|
|
|
|
/**
|
|
* ComputeRootFrameToHandleEvent() returns root frame to handle the event.
|
|
* For example, if there is a popup, this returns the popup frame.
|
|
* If there is capturing content and it's in a scrolled frame, returns
|
|
* the scrolled frame.
|
|
*
|
|
* @param aFrameForPresShell The frame for PresShell. See
|
|
* explanation of HandleEvent() for
|
|
* the details.
|
|
* @param aGUIEvent The handling event.
|
|
* @param aCapturingContent Capturing content if there is.
|
|
* nullptr, otherwise.
|
|
* @param aIsCapturingContentIgnored [out] true if aCapturingContent
|
|
* is not nullptr but it should be
|
|
* ignored to handle the event.
|
|
* @param aIsCaptureRetargeted [out] true if aCapturingContent
|
|
* is not nullptr but it's
|
|
* retargeted.
|
|
* @return Root frame to handle the event.
|
|
*/
|
|
nsIFrame* ComputeRootFrameToHandleEvent(nsIFrame* aFrameForPresShell,
|
|
WidgetGUIEvent* aGUIEvent,
|
|
nsIContent* aCapturingContent,
|
|
bool* aIsCapturingContentIgnored,
|
|
bool* aIsCaptureRetargeted);
|
|
|
|
/**
|
|
* ComputeRootFrameToHandleEventWithPopup() returns popup frame if there
|
|
* is a popup and we should handle the event in it. Otherwise, returns
|
|
* aRootFrameToHandleEvent.
|
|
*
|
|
* @param aRootFrameToHandleEvent Candidate root frame to handle
|
|
* the event.
|
|
* @param aGUIEvent The handling event.
|
|
* @param aCapturingContent Capturing content if there is.
|
|
* nullptr, otherwise.
|
|
* @param aIsCapturingContentIgnored [out] true if aCapturingContent
|
|
* is not nullptr but it should be
|
|
* ignored to handle the event.
|
|
* @return A popup frame if there is a
|
|
* popup and we should handle the
|
|
* event in it. Otherwise,
|
|
* aRootFrameToHandleEvent.
|
|
* I.e., never returns nullptr.
|
|
*/
|
|
nsIFrame* ComputeRootFrameToHandleEventWithPopup(
|
|
nsIFrame* aRootFrameToHandleEvent, WidgetGUIEvent* aGUIEvent,
|
|
nsIContent* aCapturingContent, bool* aIsCapturingContentIgnored);
|
|
|
|
/**
|
|
* ComputeRootFrameToHandleEventWithCapturingContent() returns root frame
|
|
* to handle event for the capturing content, or aRootFrameToHandleEvent
|
|
* if it should be ignored.
|
|
*
|
|
* @param aRootFrameToHandleEvent Candidate root frame to handle
|
|
* the event.
|
|
* @param aCapturingContent Capturing content. nullptr is
|
|
* not allowed.
|
|
* @param aIsCapturingContentIgnored [out] true if aCapturingContent
|
|
* is not nullptr but it should be
|
|
* ignored to handle the event.
|
|
* @param aIsCaptureRetargeted [out] true if aCapturingContent
|
|
* is not nullptr but it's
|
|
* retargeted.
|
|
* @return A popup frame if there is a
|
|
* popup and we should handle the
|
|
* event in it. Otherwise,
|
|
* aRootFrameToHandleEvent.
|
|
* I.e., never returns nullptr.
|
|
*/
|
|
nsIFrame* ComputeRootFrameToHandleEventWithCapturingContent(
|
|
nsIFrame* aRootFrameToHandleEvent, nsIContent* aCapturingContent,
|
|
bool* aIsCapturingContentIgnored, bool* aIsCaptureRetargeted);
|
|
|
|
/**
|
|
* HandleEventWithPointerCapturingContentWithoutItsFrame() handles
|
|
* aGUIEvent with aPointerCapturingContent when it does not have primary
|
|
* frame.
|
|
*
|
|
* @param aFrameForPresShell The frame for PresShell. See
|
|
* explanation of HandleEvent() for the
|
|
* details.
|
|
* @param aGUIEvent The handling event.
|
|
* @param aPointerCapturingContent Current pointer capturing content.
|
|
* Must not be nullptr.
|
|
* @param aEventStatus [in/out] The event status of aGUIEvent.
|
|
* @return Basically, result of
|
|
* HandeEventWithTraget().
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT
|
|
nsresult HandleEventWithPointerCapturingContentWithoutItsFrame(
|
|
nsIFrame* aFrameForPresShell, WidgetGUIEvent* aGUIEvent,
|
|
nsIContent* aPointerCapturingContent, nsEventStatus* aEventStatus);
|
|
|
|
/**
|
|
* HandleEventAtFocusedContent() handles aGUIEvent at focused content.
|
|
*
|
|
* @param aGUIEvent The handling event which should be handled at
|
|
* focused content.
|
|
* @param aEventStatus [in/out] The event status of aGUIEvent.
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT
|
|
nsresult HandleEventAtFocusedContent(WidgetGUIEvent* aGUIEvent,
|
|
nsEventStatus* aEventStatus);
|
|
|
|
/**
|
|
* ComputeFocusedEventTargetElement() returns event target element for
|
|
* aGUIEvent which should be handled with focused content.
|
|
* This may set/unset sLastKeyDownEventTarget if necessary.
|
|
*
|
|
* @param aGUIEvent The handling event.
|
|
* @return The element which should be the event
|
|
* target of aGUIEvent.
|
|
*/
|
|
dom::Element* ComputeFocusedEventTargetElement(WidgetGUIEvent* aGUIEvent);
|
|
|
|
/**
|
|
* MaybeHandleEventWithAnotherPresShell() may handle aGUIEvent with another
|
|
* PresShell.
|
|
*
|
|
* @param aEventTargetElement The event target element of aGUIEvent.
|
|
* @param aGUIEvent Handling event.
|
|
* @param aEventStatus [in/out] EventStatus of aGUIEvent.
|
|
* @param aRv [out] Returns error if this gets an
|
|
* error handling the event.
|
|
* @return false if caller needs to keep handling
|
|
* the event by itself.
|
|
* true if caller shouldn't keep handling
|
|
* the event. Note that when no PresShell
|
|
* can handle the event, this returns true.
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT
|
|
bool MaybeHandleEventWithAnotherPresShell(dom::Element* aEventTargetElement,
|
|
WidgetGUIEvent* aGUIEvent,
|
|
nsEventStatus* aEventStatus,
|
|
nsresult* aRv);
|
|
|
|
/**
|
|
* HandleRetargetedEvent() dispatches aGUIEvent on the PresShell without
|
|
* retargetting. This should be used only when caller computes final
|
|
* target of aGUIEvent.
|
|
*
|
|
* @param aGUIEvent Event to be dispatched.
|
|
* @param aEventStatus [in/out] EventStatus of aGUIEvent.
|
|
* @param aTarget The final target of aGUIEvent.
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT
|
|
nsresult HandleRetargetedEvent(WidgetGUIEvent* aGUIEvent,
|
|
nsEventStatus* aEventStatus,
|
|
nsIContent* aTarget) {
|
|
AutoCurrentEventInfoSetter eventInfoSetter(*this, nullptr, aTarget);
|
|
if (!mPresShell->GetCurrentEventFrame()) {
|
|
return NS_OK;
|
|
}
|
|
nsCOMPtr<nsIContent> overrideClickTarget;
|
|
return HandleEventWithCurrentEventInfo(aGUIEvent, aEventStatus, true,
|
|
overrideClickTarget);
|
|
}
|
|
|
|
/**
|
|
* HandleEventWithFrameForPresShell() handles aGUIEvent with the frame
|
|
* for mPresShell.
|
|
*
|
|
* @param aFrameForPresShell The frame for mPresShell.
|
|
* @param aGUIEvent The handling event. It shouldn't be
|
|
* handled with using coordinates nor
|
|
* handled at focused content.
|
|
* @param aEventStatus [in/out] The status of aGUIEvent.
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT
|
|
nsresult HandleEventWithFrameForPresShell(nsIFrame* aFrameForPresShell,
|
|
WidgetGUIEvent* aGUIEvent,
|
|
nsEventStatus* aEventStatus);
|
|
|
|
/**
|
|
* HandleEventWithCurrentEventInfo() prepares to dispatch aEvent into the
|
|
* DOM, dispatches aEvent into the DOM with using current event info of
|
|
* mPresShell and notifies EventStateManager of that.
|
|
*
|
|
* @param aEvent Event to be dispatched.
|
|
* @param aEventStatus [in/out] EventStatus of aEvent.
|
|
* @param aIsHandlingNativeEvent true if aGUIEvent represents a native
|
|
* event.
|
|
* @param aOverrideClickTarget Override click event target.
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT
|
|
nsresult HandleEventWithCurrentEventInfo(WidgetEvent* aEvent,
|
|
nsEventStatus* aEventStatus,
|
|
bool aIsHandlingNativeEvent,
|
|
nsIContent* aOverrideClickTarget);
|
|
|
|
/**
|
|
* HandlingTimeAccumulator() may accumulate handling time of telemetry
|
|
* for each type of events.
|
|
*/
|
|
class MOZ_STACK_CLASS HandlingTimeAccumulator final {
|
|
public:
|
|
HandlingTimeAccumulator() = delete;
|
|
HandlingTimeAccumulator(const HandlingTimeAccumulator& aOther) = delete;
|
|
HandlingTimeAccumulator(const EventHandler& aEventHandler,
|
|
const WidgetEvent* aEvent);
|
|
~HandlingTimeAccumulator();
|
|
|
|
private:
|
|
const EventHandler& mEventHandler;
|
|
const WidgetEvent* mEvent;
|
|
TimeStamp mHandlingStartTime;
|
|
};
|
|
|
|
/**
|
|
* RecordEventPreparationPerformance() records event preparation performance
|
|
* with telemetry only when aEvent is a trusted event.
|
|
*
|
|
* @param aEvent The handling event which we've finished
|
|
* preparing something to dispatch.
|
|
*/
|
|
void RecordEventPreparationPerformance(const WidgetEvent* aEvent);
|
|
|
|
/**
|
|
* RecordEventHandlingResponsePerformance() records event handling response
|
|
* performance with telemetry.
|
|
*
|
|
* @param aEvent The handled event.
|
|
*/
|
|
void RecordEventHandlingResponsePerformance(const WidgetEvent* aEvent);
|
|
|
|
/**
|
|
* PrepareToDispatchEvent() prepares to dispatch aEvent.
|
|
*
|
|
* @param aEvent The handling event.
|
|
* @param aEventStatus [in/out] The status of aEvent.
|
|
* @param aTouchIsNew [out] Set to true if the event is an
|
|
* eTouchMove event and it represents new
|
|
* touch. Otherwise, set to false.
|
|
* @return true if the caller can dispatch the
|
|
* event into the DOM.
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT
|
|
bool PrepareToDispatchEvent(WidgetEvent* aEvent,
|
|
nsEventStatus* aEventStatus, bool* aTouchIsNew);
|
|
|
|
/**
|
|
* MaybeHandleKeyboardEventBeforeDispatch() may handle aKeyboardEvent
|
|
* if it should do something before dispatched into the DOM.
|
|
*
|
|
* @param aKeyboardEvent The handling keyboard event.
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT
|
|
void MaybeHandleKeyboardEventBeforeDispatch(
|
|
WidgetKeyboardEvent* aKeyboardEvent);
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT
|
|
bool AdjustContextMenuKeyEvent(WidgetMouseEvent* aMouseEvent);
|
|
|
|
MOZ_CAN_RUN_SCRIPT
|
|
bool PrepareToUseCaretPosition(nsIWidget* aEventWidget,
|
|
LayoutDeviceIntPoint& 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.
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT
|
|
void GetCurrentItemAndPositionForElement(dom::Element* aFocusedElement,
|
|
nsIContent** aTargetToUse,
|
|
LayoutDeviceIntPoint& aTargetPt,
|
|
nsIWidget* aRootWidget);
|
|
|
|
nsIContent* GetOverrideClickTarget(WidgetGUIEvent* aGUIEvent,
|
|
nsIFrame* aFrame);
|
|
|
|
/**
|
|
* DispatchEvent() tries to dispatch aEvent and notifies aEventStateManager
|
|
* of doing it.
|
|
*
|
|
* @param aEventStateManager EventStateManager which should handle
|
|
* the event before/after dispatching
|
|
* aEvent into the DOM.
|
|
* @param aEvent The handling event.
|
|
* @param aTouchIsNew Set this to true when the message is
|
|
* eTouchMove and it's newly touched.
|
|
* Then, the "touchmove" event becomes
|
|
* cancelable.
|
|
* @param aEventStatus [in/out] The status of aEvent.
|
|
* @param aOverrideClickTarget Override click event target.
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT nsresult
|
|
DispatchEvent(EventStateManager* aEventStateManager, WidgetEvent* aEvent,
|
|
bool aTouchIsNew, nsEventStatus* aEventStatus,
|
|
nsIContent* aOverrideClickTarget);
|
|
|
|
/**
|
|
* DispatchEventToDOM() actually dispatches aEvent into the DOM tree.
|
|
*
|
|
* @param aEvent Event to be dispatched into the DOM tree.
|
|
* @param aEventStatus [in/out] EventStatus of aEvent.
|
|
* @param aEventCB The callback kicked when the event moves
|
|
* from the default group to the system group.
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT nsresult
|
|
DispatchEventToDOM(WidgetEvent* aEvent, nsEventStatus* aEventStatus,
|
|
nsPresShellEventCB* aEventCB);
|
|
|
|
/**
|
|
* DispatchTouchEventToDOM() dispatches touch events into the DOM tree.
|
|
*
|
|
* @param aEvent The source of events to be dispatched into the
|
|
* DOM tree.
|
|
* @param aEventStatus [in/out] EventStatus of aEvent.
|
|
* @param aEventCB The callback kicked when the events move
|
|
* from the default group to the system group.
|
|
* @param aTouchIsNew Set this to true when the message is eTouchMove
|
|
* and it's newly touched. Then, the "touchmove"
|
|
* event becomes cancelable.
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT void DispatchTouchEventToDOM(
|
|
WidgetEvent* aEvent, nsEventStatus* aEventStatus,
|
|
nsPresShellEventCB* aEventCB, bool aTouchIsNew);
|
|
|
|
/**
|
|
* FinalizeHandlingEvent() should be called after calling DispatchEvent()
|
|
* and then, this cleans up the state of mPresShell and aEvent.
|
|
*
|
|
* @param aEvent The handled event.
|
|
*/
|
|
void FinalizeHandlingEvent(WidgetEvent* aEvent);
|
|
|
|
/**
|
|
* AutoCurrentEventInfoSetter() pushes and pops current event info of
|
|
* aEventHandler.mPresShell.
|
|
*/
|
|
struct MOZ_STACK_CLASS AutoCurrentEventInfoSetter final {
|
|
explicit AutoCurrentEventInfoSetter(EventHandler& aEventHandler)
|
|
: mEventHandler(aEventHandler) {
|
|
MOZ_DIAGNOSTIC_ASSERT(!mEventHandler.mCurrentEventInfoSetter);
|
|
mEventHandler.mCurrentEventInfoSetter = this;
|
|
mEventHandler.mPresShell->PushCurrentEventInfo(nullptr, nullptr);
|
|
}
|
|
AutoCurrentEventInfoSetter(EventHandler& aEventHandler, nsIFrame* aFrame,
|
|
nsIContent* aContent)
|
|
: mEventHandler(aEventHandler) {
|
|
MOZ_DIAGNOSTIC_ASSERT(!mEventHandler.mCurrentEventInfoSetter);
|
|
mEventHandler.mCurrentEventInfoSetter = this;
|
|
mEventHandler.mPresShell->PushCurrentEventInfo(aFrame, aContent);
|
|
}
|
|
AutoCurrentEventInfoSetter(EventHandler& aEventHandler,
|
|
EventTargetData& aEventTargetData)
|
|
: mEventHandler(aEventHandler) {
|
|
MOZ_DIAGNOSTIC_ASSERT(!mEventHandler.mCurrentEventInfoSetter);
|
|
mEventHandler.mCurrentEventInfoSetter = this;
|
|
mEventHandler.mPresShell->PushCurrentEventInfo(
|
|
aEventTargetData.mFrame, aEventTargetData.mContent);
|
|
}
|
|
~AutoCurrentEventInfoSetter() {
|
|
mEventHandler.mPresShell->PopCurrentEventInfo();
|
|
mEventHandler.mCurrentEventInfoSetter = nullptr;
|
|
}
|
|
|
|
private:
|
|
EventHandler& mEventHandler;
|
|
};
|
|
|
|
/**
|
|
* Wrapper methods to access methods of mPresShell.
|
|
*/
|
|
nsPresContext* GetPresContext() const {
|
|
return mPresShell->GetPresContext();
|
|
}
|
|
Document* GetDocument() const { return mPresShell->GetDocument(); }
|
|
nsCSSFrameConstructor* FrameConstructor() const {
|
|
return mPresShell->FrameConstructor();
|
|
}
|
|
already_AddRefed<nsPIDOMWindowOuter> GetFocusedDOMWindowInOurWindow() {
|
|
return mPresShell->GetFocusedDOMWindowInOurWindow();
|
|
}
|
|
already_AddRefed<PresShell> GetParentPresShellForEventHandling() {
|
|
return mPresShell->GetParentPresShellForEventHandling();
|
|
}
|
|
void PushDelayedEventIntoQueue(UniquePtr<DelayedEvent>&& aDelayedEvent) {
|
|
mPresShell->mDelayedEvents.AppendElement(std::move(aDelayedEvent));
|
|
}
|
|
|
|
OwningNonNull<PresShell> mPresShell;
|
|
AutoCurrentEventInfoSetter* mCurrentEventInfoSetter;
|
|
static TimeStamp sLastInputCreated;
|
|
static TimeStamp sLastInputProcessed;
|
|
static StaticRefPtr<dom::Element> sLastKeyDownEventTargetElement;
|
|
};
|
|
|
|
PresShell* GetRootPresShell() const;
|
|
|
|
nscolor GetDefaultBackgroundColorToDraw();
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
// Approximate frame visibility tracking implementation.
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
void UpdateApproximateFrameVisibility();
|
|
void DoUpdateApproximateFrameVisibility(bool aRemoveOnly);
|
|
|
|
void ClearApproximatelyVisibleFramesList(
|
|
const Maybe<OnNonvisible>& aNonvisibleAction = Nothing());
|
|
static void ClearApproximateFrameVisibilityVisited(nsView* aView,
|
|
bool aClear);
|
|
static void MarkFramesInListApproximatelyVisible(const nsDisplayList& aList);
|
|
void MarkFramesInSubtreeApproximatelyVisible(nsIFrame* aFrame,
|
|
const nsRect& aRect,
|
|
bool aRemoveOnly = false);
|
|
|
|
void DecApproximateVisibleCount(
|
|
VisibleFrames& aFrames,
|
|
const Maybe<OnNonvisible>& aNonvisibleAction = Nothing());
|
|
|
|
nsRevocableEventPtr<nsRunnableMethod<PresShell>>
|
|
mUpdateApproximateFrameVisibilityEvent;
|
|
|
|
// A set of frames that were visible or could be visible soon at the time
|
|
// that we last did an approximate frame visibility update.
|
|
VisibleFrames mApproximatelyVisibleFrames;
|
|
|
|
#ifdef DEBUG
|
|
MOZ_CAN_RUN_SCRIPT_BOUNDARY bool VerifyIncrementalReflow();
|
|
MOZ_CAN_RUN_SCRIPT_BOUNDARY void DoVerifyReflow();
|
|
void VerifyHasDirtyRootAncestor(nsIFrame* aFrame);
|
|
void ShowEventTargetDebug();
|
|
|
|
bool mInVerifyReflow = false;
|
|
// The reflow root under which we're currently reflowing. Null when
|
|
// not in reflow.
|
|
nsIFrame* mCurrentReflowRoot = nullptr;
|
|
|
|
nsIFrame* mDrawEventTargetFrame = nullptr;
|
|
#endif // #ifdef DEBUG
|
|
|
|
// Send, and reset, the current per tick telemetry. This includes:
|
|
// * non-zero number of style and layout flushes
|
|
// * non-zero ms duration spent in style and reflow since the last tick.
|
|
void PingPerTickTelemetry(FlushType aFlushType);
|
|
|
|
private:
|
|
// IMPORTANT: The ownership implicit in the following member variables
|
|
// has been explicitly checked. 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.
|
|
// mDocument and mPresContext should've never been cleared nor swapped with
|
|
// another instance while PresShell instance is alive so that it's safe to
|
|
// call their can-run- script methods without local RefPtr variables.
|
|
RefPtr<Document> const mDocument;
|
|
RefPtr<nsPresContext> const mPresContext;
|
|
// The document's style set owns it but we maintain a ref, may be null.
|
|
RefPtr<StyleSheet> mPrefStyleSheet;
|
|
UniquePtr<nsCSSFrameConstructor> mFrameConstructor;
|
|
nsViewManager* mViewManager; // [WEAK] docViewer owns it so I don't have to
|
|
RefPtr<nsFrameSelection> mSelection;
|
|
// The frame selection that last took focus on this shell, which we need to
|
|
// hide if we focus another selection. May or may not be the same as
|
|
// `mSelection`.
|
|
RefPtr<nsFrameSelection> mFocusedFrameSelection;
|
|
RefPtr<nsCaret> mCaret;
|
|
RefPtr<nsCaret> mOriginalCaret;
|
|
RefPtr<AccessibleCaretEventHub> mAccessibleCaretEventHub;
|
|
// Pointer into mFrameConstructor - this is purely so that GetRootFrame() can
|
|
// be inlined:
|
|
nsFrameManager* mFrameManager;
|
|
WeakPtr<nsDocShell> mForwardingContainer;
|
|
|
|
// The `performance.now()` value when we last started to process reflows.
|
|
DOMHighResTimeStamp mLastReflowStart{0.0};
|
|
|
|
// 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<nsITimer> mReflowContinueTimer;
|
|
|
|
#ifdef MOZ_DIAGNOSTIC_ASSERT_ENABLED
|
|
// We track allocated pointers in a debug-only hashtable to assert against
|
|
// missing/double frees.
|
|
nsTHashSet<void*> mAllocatedPointers;
|
|
#endif
|
|
|
|
// A list of stack weak frames. This is a pointer to the last item in the
|
|
// list.
|
|
AutoWeakFrame* mAutoWeakFrames;
|
|
|
|
// A hash table of heap allocated weak frames.
|
|
nsTHashSet<WeakFrame*> mWeakFrames;
|
|
|
|
class DirtyRootsList {
|
|
public:
|
|
// Add a dirty root.
|
|
void Add(nsIFrame* aFrame);
|
|
// Remove this frame if present.
|
|
void Remove(nsIFrame* aFrame);
|
|
// Remove and return one of the shallowest dirty roots from the list.
|
|
// (If two roots are at the same depth, order is indeterminate.)
|
|
nsIFrame* PopShallowestRoot();
|
|
// Remove all dirty roots.
|
|
void Clear();
|
|
// Is this frame one of the dirty roots?
|
|
bool Contains(nsIFrame* aFrame) const;
|
|
// Are there no dirty roots?
|
|
bool IsEmpty() const;
|
|
// Is the given frame an ancestor of any dirty root?
|
|
bool FrameIsAncestorOfDirtyRoot(nsIFrame* aFrame) const;
|
|
|
|
private:
|
|
struct FrameAndDepth {
|
|
nsIFrame* mFrame;
|
|
const uint32_t mDepth;
|
|
|
|
// Easy conversion to nsIFrame*, as it's the most likely need.
|
|
operator nsIFrame*() const { return mFrame; }
|
|
|
|
// Used to sort by reverse depths, i.e., deeper < shallower.
|
|
class CompareByReverseDepth {
|
|
public:
|
|
bool Equals(const FrameAndDepth& aA, const FrameAndDepth& aB) const {
|
|
return aA.mDepth == aB.mDepth;
|
|
}
|
|
bool LessThan(const FrameAndDepth& aA, const FrameAndDepth& aB) const {
|
|
// Reverse depth! So '>' instead of '<'.
|
|
return aA.mDepth > aB.mDepth;
|
|
}
|
|
};
|
|
};
|
|
// List of all known dirty roots, sorted by decreasing depths.
|
|
nsTArray<FrameAndDepth> mList;
|
|
};
|
|
|
|
// Reflow roots that need to be reflowed.
|
|
DirtyRootsList mDirtyRoots;
|
|
|
|
// These two fields capture call stacks of any changes that require a restyle
|
|
// or a reflow. Only the first change per restyle / reflow is recorded (the
|
|
// one that caused a call to SetNeedStyleFlush() / SetNeedLayoutFlush()).
|
|
UniquePtr<ProfileChunkedBuffer> mStyleCause;
|
|
UniquePtr<ProfileChunkedBuffer> mReflowCause;
|
|
|
|
nsTArray<UniquePtr<DelayedEvent>> mDelayedEvents;
|
|
|
|
nsRevocableEventPtr<nsSynthMouseMoveEvent> mSynthMouseMoveEvent;
|
|
|
|
TouchManager mTouchManager;
|
|
|
|
RefPtr<ZoomConstraintsClient> mZoomConstraintsClient;
|
|
RefPtr<GeckoMVMContext> mMVMContext;
|
|
RefPtr<MobileViewportManager> mMobileViewportManager;
|
|
|
|
// This timer controls painting suppression. Until it fires
|
|
// or all frames are constructed, we won't paint anything but
|
|
// our <body> background and scrollbars.
|
|
nsCOMPtr<nsITimer> mPaintSuppressionTimer;
|
|
|
|
nsCOMPtr<nsITimer> mDelayedPaintTimer;
|
|
|
|
// Information about live content (which still stay in DOM tree).
|
|
// Used in case we need re-dispatch event after sending pointer event,
|
|
// when target of pointer event was deleted during executing user handlers.
|
|
nsCOMPtr<nsIContent> mPointerEventTarget;
|
|
|
|
nsCOMPtr<nsIContent> mLastAnchorScrolledTo;
|
|
|
|
// 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<nsIContent> mContentToScrollTo;
|
|
|
|
#ifdef ACCESSIBILITY
|
|
a11y::DocAccessible* mDocAccessible;
|
|
#endif // #ifdef ACCESSIBILITY
|
|
|
|
nsIFrame* mCurrentEventFrame;
|
|
nsCOMPtr<nsIContent> mCurrentEventContent;
|
|
nsTArray<nsIFrame*> mCurrentEventFrameStack;
|
|
nsCOMArray<nsIContent> mCurrentEventContentStack;
|
|
// Set of frames that we should mark with NS_FRAME_HAS_DIRTY_CHILDREN after
|
|
// we finish reflowing mCurrentReflowRoot.
|
|
nsTHashSet<nsIFrame*> mFramesToDirty;
|
|
nsTHashSet<nsIScrollableFrame*> mPendingScrollAnchorSelection;
|
|
nsTHashSet<nsIScrollableFrame*> mPendingScrollAnchorAdjustment;
|
|
|
|
nsCallbackEventRequest* mFirstCallbackEventRequest = nullptr;
|
|
nsCallbackEventRequest* mLastCallbackEventRequest = nullptr;
|
|
|
|
// 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,
|
|
// in visual coordinates. 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;
|
|
// This is an APZ state variable that tracks the target guid for the last
|
|
// mouse event that was processed (corresponding to mMouseLocation). This is
|
|
// needed for the synthetic mouse events.
|
|
layers::ScrollableLayerGuid mMouseEventTargetGuid;
|
|
|
|
nsSize mVisualViewportSize;
|
|
|
|
// The focus information needed for async keyboard scrolling
|
|
FocusTarget mAPZFocusTarget;
|
|
|
|
using Arena = nsPresArena<8192, ArenaObjectID, eArenaObjectID_COUNT>;
|
|
Arena mFrameArena;
|
|
|
|
Maybe<nsPoint> mVisualViewportOffset;
|
|
|
|
// A pending visual scroll offset that we will ask APZ to scroll to
|
|
// during the next transaction. Cleared when we send the transaction.
|
|
// Only applicable to the RCD pres shell.
|
|
Maybe<VisualScrollUpdate> mPendingVisualScrollUpdate;
|
|
|
|
// Used to force allocation and rendering of proportionally more or
|
|
// less pixels in both dimensions.
|
|
Maybe<float> mResolution;
|
|
|
|
TimeStamp mLoadBegin; // used to time loads
|
|
|
|
TimeStamp mLastOSWake;
|
|
|
|
// Count of the number of times this presshell has been painted to a window.
|
|
uint64_t mPaintCount;
|
|
|
|
// The focus sequence number of the last processed input event
|
|
uint64_t mAPZFocusSequenceNumber;
|
|
|
|
nscoord mLastAnchorScrollPositionY = 0;
|
|
|
|
// Most recent canvas background color.
|
|
nscolor mCanvasBackgroundColor;
|
|
|
|
int32_t mActiveSuppressDisplayport;
|
|
|
|
uint32_t mPresShellId;
|
|
|
|
// Cached font inflation values. This is done to prevent changing of font
|
|
// inflation until a page is reloaded.
|
|
uint32_t mFontSizeInflationEmPerLine;
|
|
uint32_t mFontSizeInflationMinTwips;
|
|
uint32_t mFontSizeInflationLineThreshold;
|
|
|
|
// Can be multiple of nsISelectionDisplay::DISPLAY_*.
|
|
int16_t mSelectionFlags;
|
|
|
|
// 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;
|
|
|
|
// Flags controlling how our document is rendered. These persist
|
|
// between paints and so are tied with retained layer pixels.
|
|
// PresShell flushes retained layers when the rendering state
|
|
// changes in a way that prevents us from being able to (usefully)
|
|
// re-use old pixels.
|
|
RenderingStateFlags mRenderingStateFlags;
|
|
|
|
// Whether we're currently under a FlushPendingNotifications.
|
|
// This is used to handle flush reentry correctly.
|
|
// NOTE: This can't be a bitfield since AutoRestore has a reference to this
|
|
// variable.
|
|
bool mInFlush;
|
|
|
|
bool mCaretEnabled : 1;
|
|
|
|
// True if a layout flush might not be a no-op
|
|
bool mNeedLayoutFlush : 1;
|
|
|
|
// True if a style flush might not be a no-op
|
|
bool mNeedStyleFlush : 1;
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|
|
|
// True if there are throttled animations that would be processed when
|
|
// performing a flush with mFlushAnimations == true.
|
|
bool mNeedThrottledAnimationFlush : 1;
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|
|
|
bool mVisualViewportSizeSet : 1;
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|
|
|
bool mDidInitialize : 1;
|
|
bool mIsDestroying : 1;
|
|
bool mIsReflowing : 1;
|
|
bool mIsObservingDocument : 1;
|
|
|
|
// Whether we shouldn't ever get to FlushPendingNotifications. This flag is
|
|
// meant only to sanity-check / assert that FlushPendingNotifications doesn't
|
|
// happen during certain periods of time. It shouldn't be made public nor used
|
|
// for other purposes.
|
|
bool mForbiddenToFlush : 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;
|
|
bool mHaveShutDown : 1;
|
|
|
|
// For all documents we initially lock down painting.
|
|
bool mPaintingSuppressed : 1;
|
|
|
|
bool mLastRootReflowHadUnconstrainedBSize : 1;
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|
|
|
// Indicates that it is safe to unlock painting once all pending reflows
|
|
// have been processed.
|
|
bool mShouldUnsuppressPainting : 1;
|
|
|
|
bool mIgnoreFrameDestruction : 1;
|
|
|
|
bool mIsActive : 1;
|
|
bool mFrozen : 1;
|
|
bool mIsFirstPaint : 1;
|
|
bool mObservesMutationsForPrint : 1;
|
|
|
|
// Whether the most recent interruptible reflow was actually interrupted:
|
|
bool mWasLastReflowInterrupted : 1;
|
|
|
|
// True if we're observing the refresh driver for style flushes.
|
|
bool mObservingStyleFlushes : 1;
|
|
|
|
// True if we're observing the refresh driver for layout flushes, that is, if
|
|
// we have a reflow scheduled.
|
|
//
|
|
// Guaranteed to be false if mReflowContinueTimer is non-null.
|
|
bool mObservingLayoutFlushes : 1;
|
|
|
|
bool mResizeEventPending : 1;
|
|
|
|
bool mFontSizeInflationForceEnabled : 1;
|
|
bool mFontSizeInflationDisabledInMasterProcess : 1;
|
|
bool mFontSizeInflationEnabled : 1;
|
|
|
|
// If a document belongs to an invisible DocShell, this flag must be set
|
|
// to true, so we can avoid any paint calls for widget related to this
|
|
// presshell.
|
|
bool mIsNeverPainting : 1;
|
|
|
|
// Whether the most recent change to the pres shell resolution was
|
|
// originated by the main thread.
|
|
bool mResolutionUpdated : 1;
|
|
|
|
// True if the resolution has been ever changed by APZ.
|
|
bool mResolutionUpdatedByApz : 1;
|
|
|
|
// Whether this presshell is hidden by 'vibility:hidden' on an ancestor
|
|
// nsSubDocumentFrame.
|
|
bool mUnderHiddenEmbedderElement : 1;
|
|
|
|
bool mDocumentLoading : 1;
|
|
bool mNoDelayedMouseEvents : 1;
|
|
bool mNoDelayedKeyEvents : 1;
|
|
|
|
bool mApproximateFrameVisibilityVisited : 1;
|
|
|
|
bool mNextPaintCompressed : 1;
|
|
|
|
bool mHasCSSBackgroundColor : 1;
|
|
|
|
// Whether the last chrome-only escape key event is consumed.
|
|
bool mIsLastChromeOnlyEscapeKeyConsumed : 1;
|
|
|
|
// Whether the widget has received a paint message yet.
|
|
bool mHasReceivedPaintMessage : 1;
|
|
|
|
bool mIsLastKeyDownCanceled : 1;
|
|
|
|
// Whether we have ever handled a user input event
|
|
bool mHasHandledUserInput : 1;
|
|
|
|
// Whether we should dispatch keypress events even for non-printable keys
|
|
// for keeping backward compatibility.
|
|
bool mForceDispatchKeyPressEventsForNonPrintableKeys : 1;
|
|
// Whether we should set keyCode or charCode value of keypress events whose
|
|
// value is zero to the other value or not. When this is set to true, we
|
|
// should keep using legacy keyCode and charCode values (i.e., one of them
|
|
// is always 0).
|
|
bool mForceUseLegacyKeyCodeAndCharCodeValues : 1;
|
|
// Whether mForceDispatchKeyPressEventsForNonPrintableKeys and
|
|
// mForceUseLegacyKeyCodeAndCharCodeValues are initialized.
|
|
bool mInitializedWithKeyPressEventDispatchingBlacklist : 1;
|
|
|
|
// Whether we should dispatch click events for non-primary mouse buttons.
|
|
bool mForceUseLegacyNonPrimaryDispatch : 1;
|
|
// Whether mForceUseLegacyNonPrimaryDispatch is initialised.
|
|
bool mInitializedWithClickEventDispatchingBlacklist : 1;
|
|
|
|
// Set to true if mMouseLocation is set by a mouse event which is synthesized
|
|
// for tests.
|
|
bool mMouseLocationWasSetBySynthesizedMouseEventForTests : 1;
|
|
|
|
struct CapturingContentInfo final {
|
|
CapturingContentInfo()
|
|
: mRemoteTarget(nullptr),
|
|
mAllowed(false),
|
|
mPointerLock(false),
|
|
mRetargetToElement(false),
|
|
mPreventDrag(false) {}
|
|
|
|
// capture should only be allowed during a mousedown event
|
|
StaticRefPtr<nsIContent> mContent;
|
|
dom::BrowserParent* mRemoteTarget;
|
|
bool mAllowed;
|
|
bool mPointerLock;
|
|
bool mRetargetToElement;
|
|
bool mPreventDrag;
|
|
};
|
|
static CapturingContentInfo sCapturingContentInfo;
|
|
|
|
static bool sDisableNonTestMouseEvents;
|
|
|
|
static bool sProcessInteractable;
|
|
|
|
layout_telemetry::Data mLayoutTelemetry;
|
|
};
|
|
|
|
NS_DEFINE_STATIC_IID_ACCESSOR(PresShell, NS_PRESSHELL_IID)
|
|
|
|
} // namespace mozilla
|
|
|
|
#endif // mozilla_PresShell_h
|