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-rw-r--r--layout/base/AccessibleCaretEventHub.cpp829
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diff --git a/layout/base/AccessibleCaretEventHub.cpp b/layout/base/AccessibleCaretEventHub.cpp
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index 000000000..b897e4d77
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+++ b/layout/base/AccessibleCaretEventHub.cpp
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "AccessibleCaretEventHub.h"
+
+#include "AccessibleCaretLogger.h"
+#include "AccessibleCaretManager.h"
+#include "Layers.h"
+#include "gfxPrefs.h"
+#include "mozilla/AutoRestore.h"
+#include "mozilla/MouseEvents.h"
+#include "mozilla/TextEvents.h"
+#include "mozilla/TouchEvents.h"
+#include "mozilla/Preferences.h"
+#include "nsCanvasFrame.h"
+#include "nsDocShell.h"
+#include "nsFocusManager.h"
+#include "nsFrameSelection.h"
+#include "nsITimer.h"
+#include "nsPresContext.h"
+
+namespace mozilla {
+
+#undef AC_LOG
+#define AC_LOG(message, ...) \
+ AC_LOG_BASE("AccessibleCaretEventHub (%p): " message, this, ##__VA_ARGS__);
+
+#undef AC_LOGV
+#define AC_LOGV(message, ...) \
+ AC_LOGV_BASE("AccessibleCaretEventHub (%p): " message, this, ##__VA_ARGS__);
+
+NS_IMPL_ISUPPORTS(AccessibleCaretEventHub, nsIReflowObserver, nsIScrollObserver,
+ nsISelectionListener, nsISupportsWeakReference);
+
+// -----------------------------------------------------------------------------
+// NoActionState
+//
+class AccessibleCaretEventHub::NoActionState
+ : public AccessibleCaretEventHub::State
+{
+public:
+ virtual const char* Name() const override { return "NoActionState"; }
+
+ virtual nsEventStatus OnPress(AccessibleCaretEventHub* aContext,
+ const nsPoint& aPoint, int32_t aTouchId,
+ EventClassID aEventClass) override
+ {
+ nsEventStatus rv = nsEventStatus_eIgnore;
+
+ if (NS_SUCCEEDED(aContext->mManager->PressCaret(aPoint, aEventClass))) {
+ aContext->SetState(aContext->PressCaretState());
+ rv = nsEventStatus_eConsumeNoDefault;
+ } else {
+ aContext->SetState(aContext->PressNoCaretState());
+ }
+
+ aContext->mPressPoint = aPoint;
+ aContext->mActiveTouchId = aTouchId;
+
+ return rv;
+ }
+
+ virtual void OnScrollStart(AccessibleCaretEventHub* aContext) override
+ {
+ aContext->mManager->OnScrollStart();
+ aContext->SetState(aContext->ScrollState());
+ }
+
+ virtual void OnScrollPositionChanged(
+ AccessibleCaretEventHub* aContext) override
+ {
+ aContext->mManager->OnScrollPositionChanged();
+ }
+
+ virtual void OnSelectionChanged(AccessibleCaretEventHub* aContext,
+ nsIDOMDocument* aDoc, nsISelection* aSel,
+ int16_t aReason) override
+ {
+ aContext->mManager->OnSelectionChanged(aDoc, aSel, aReason);
+ }
+
+ virtual void OnBlur(AccessibleCaretEventHub* aContext,
+ bool aIsLeavingDocument) override
+ {
+ aContext->mManager->OnBlur();
+ }
+
+ virtual void OnReflow(AccessibleCaretEventHub* aContext) override
+ {
+ aContext->mManager->OnReflow();
+ }
+
+ virtual void Enter(AccessibleCaretEventHub* aContext) override
+ {
+ aContext->mPressPoint = nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
+ aContext->mActiveTouchId = kInvalidTouchId;
+ }
+};
+
+// -----------------------------------------------------------------------------
+// PressCaretState: Always consume the event since we've pressed on the caret.
+//
+class AccessibleCaretEventHub::PressCaretState
+ : public AccessibleCaretEventHub::State
+{
+public:
+ virtual const char* Name() const override { return "PressCaretState"; }
+
+ virtual nsEventStatus OnMove(AccessibleCaretEventHub* aContext,
+ const nsPoint& aPoint) override
+ {
+ if (aContext->MoveDistanceIsLarge(aPoint)) {
+ if (NS_SUCCEEDED(aContext->mManager->DragCaret(aPoint))) {
+ aContext->SetState(aContext->DragCaretState());
+ }
+ }
+
+ return nsEventStatus_eConsumeNoDefault;
+ }
+
+ virtual nsEventStatus OnRelease(AccessibleCaretEventHub* aContext) override
+ {
+ aContext->mManager->ReleaseCaret();
+ aContext->mManager->TapCaret(aContext->mPressPoint);
+ aContext->SetState(aContext->NoActionState());
+
+ return nsEventStatus_eConsumeNoDefault;
+ }
+
+ virtual nsEventStatus OnLongTap(AccessibleCaretEventHub* aContext,
+ const nsPoint& aPoint) override
+ {
+ return nsEventStatus_eConsumeNoDefault;
+ }
+};
+
+// -----------------------------------------------------------------------------
+// DragCaretState: Always consume the event since we've pressed on the caret.
+//
+class AccessibleCaretEventHub::DragCaretState
+ : public AccessibleCaretEventHub::State
+{
+public:
+ virtual const char* Name() const override { return "DragCaretState"; }
+
+ virtual nsEventStatus OnMove(AccessibleCaretEventHub* aContext,
+ const nsPoint& aPoint) override
+ {
+ aContext->mManager->DragCaret(aPoint);
+
+ return nsEventStatus_eConsumeNoDefault;
+ }
+
+ virtual nsEventStatus OnRelease(AccessibleCaretEventHub* aContext) override
+ {
+ aContext->mManager->ReleaseCaret();
+ aContext->SetState(aContext->NoActionState());
+
+ return nsEventStatus_eConsumeNoDefault;
+ }
+};
+
+// -----------------------------------------------------------------------------
+// PressNoCaretState
+//
+class AccessibleCaretEventHub::PressNoCaretState
+ : public AccessibleCaretEventHub::State
+{
+public:
+ virtual const char* Name() const override { return "PressNoCaretState"; }
+
+ virtual nsEventStatus OnMove(AccessibleCaretEventHub* aContext,
+ const nsPoint& aPoint) override
+ {
+ if (aContext->MoveDistanceIsLarge(aPoint)) {
+ aContext->SetState(aContext->NoActionState());
+ }
+
+ return nsEventStatus_eIgnore;
+ }
+
+ virtual nsEventStatus OnRelease(AccessibleCaretEventHub* aContext) override
+ {
+ aContext->SetState(aContext->NoActionState());
+
+ return nsEventStatus_eIgnore;
+ }
+
+ virtual nsEventStatus OnLongTap(AccessibleCaretEventHub* aContext,
+ const nsPoint& aPoint) override
+ {
+ aContext->SetState(aContext->LongTapState());
+
+ return aContext->GetState()->OnLongTap(aContext, aPoint);
+ }
+
+ virtual void OnScrollStart(AccessibleCaretEventHub* aContext) override
+ {
+ aContext->mManager->OnScrollStart();
+ aContext->SetState(aContext->ScrollState());
+ }
+
+ virtual void OnBlur(AccessibleCaretEventHub* aContext,
+ bool aIsLeavingDocument) override
+ {
+ aContext->mManager->OnBlur();
+ if (aIsLeavingDocument) {
+ aContext->SetState(aContext->NoActionState());
+ }
+ }
+
+ virtual void OnSelectionChanged(AccessibleCaretEventHub* aContext,
+ nsIDOMDocument* aDoc, nsISelection* aSel,
+ int16_t aReason) override
+ {
+ aContext->mManager->OnSelectionChanged(aDoc, aSel, aReason);
+ }
+
+ virtual void OnReflow(AccessibleCaretEventHub* aContext) override
+ {
+ aContext->mManager->OnReflow();
+ }
+
+ virtual void Enter(AccessibleCaretEventHub* aContext) override
+ {
+ aContext->LaunchLongTapInjector();
+ }
+
+ virtual void Leave(AccessibleCaretEventHub* aContext) override
+ {
+ aContext->CancelLongTapInjector();
+ }
+};
+
+// -----------------------------------------------------------------------------
+// ScrollState
+//
+class AccessibleCaretEventHub::ScrollState
+ : public AccessibleCaretEventHub::State
+{
+public:
+ virtual const char* Name() const override { return "ScrollState"; }
+
+ virtual void OnScrollEnd(AccessibleCaretEventHub* aContext) override
+ {
+ aContext->SetState(aContext->PostScrollState());
+ }
+
+ virtual void OnBlur(AccessibleCaretEventHub* aContext,
+ bool aIsLeavingDocument) override
+ {
+ aContext->mManager->OnBlur();
+ if (aIsLeavingDocument) {
+ aContext->SetState(aContext->NoActionState());
+ }
+ }
+};
+
+// -----------------------------------------------------------------------------
+// PostScrollState: In this state, we are waiting for another APZ start or press
+// event.
+//
+class AccessibleCaretEventHub::PostScrollState
+ : public AccessibleCaretEventHub::State
+{
+public:
+ virtual const char* Name() const override { return "PostScrollState"; }
+
+ virtual nsEventStatus OnPress(AccessibleCaretEventHub* aContext,
+ const nsPoint& aPoint, int32_t aTouchId,
+ EventClassID aEventClass) override
+ {
+ aContext->mManager->OnScrollEnd();
+ aContext->SetState(aContext->NoActionState());
+
+ return aContext->GetState()->OnPress(aContext, aPoint, aTouchId,
+ aEventClass);
+ }
+
+ virtual void OnScrollStart(AccessibleCaretEventHub* aContext) override
+ {
+ aContext->SetState(aContext->ScrollState());
+ }
+
+ virtual void OnScrollEnd(AccessibleCaretEventHub* aContext) override
+ {
+ aContext->mManager->OnScrollEnd();
+ aContext->SetState(aContext->NoActionState());
+ }
+
+ virtual void OnBlur(AccessibleCaretEventHub* aContext,
+ bool aIsLeavingDocument) override
+ {
+ aContext->mManager->OnBlur();
+ if (aIsLeavingDocument) {
+ aContext->SetState(aContext->NoActionState());
+ }
+ }
+
+ virtual void Enter(AccessibleCaretEventHub* aContext) override
+ {
+ // Launch the injector to leave PostScrollState.
+ aContext->LaunchScrollEndInjector();
+ }
+
+ virtual void Leave(AccessibleCaretEventHub* aContext) override
+ {
+ aContext->CancelScrollEndInjector();
+ }
+};
+
+// -----------------------------------------------------------------------------
+// LongTapState
+//
+class AccessibleCaretEventHub::LongTapState
+ : public AccessibleCaretEventHub::State
+{
+public:
+ virtual const char* Name() const override { return "LongTapState"; }
+
+ virtual nsEventStatus OnLongTap(AccessibleCaretEventHub* aContext,
+ const nsPoint& aPoint) override
+ {
+ // In general text selection is lower-priority than the context menu. If
+ // we consume this long-press event, then it prevents the context menu from
+ // showing up on desktop Firefox (because that happens on long-tap-up, if
+ // the long-tap was not cancelled). So we return eIgnore instead.
+ aContext->mManager->SelectWordOrShortcut(aPoint);
+ return nsEventStatus_eIgnore;
+ }
+
+ virtual nsEventStatus OnRelease(AccessibleCaretEventHub* aContext) override
+ {
+ aContext->SetState(aContext->NoActionState());
+
+ // Do not consume the release since the press is not consumed in
+ // PressNoCaretState either.
+ return nsEventStatus_eIgnore;
+ }
+
+ virtual void OnScrollStart(AccessibleCaretEventHub* aContext) override
+ {
+ aContext->mManager->OnScrollStart();
+ aContext->SetState(aContext->ScrollState());
+ }
+
+ virtual void OnReflow(AccessibleCaretEventHub* aContext) override
+ {
+ aContext->mManager->OnReflow();
+ }
+};
+
+// -----------------------------------------------------------------------------
+// Implementation of AccessibleCaretEventHub methods
+//
+AccessibleCaretEventHub::State*
+AccessibleCaretEventHub::GetState() const
+{
+ return mState;
+}
+
+void
+AccessibleCaretEventHub::SetState(State* aState)
+{
+ MOZ_ASSERT(aState);
+
+ AC_LOG("%s -> %s", mState->Name(), aState->Name());
+
+ mState->Leave(this);
+ mState = aState;
+ mState->Enter(this);
+}
+
+MOZ_IMPL_STATE_CLASS_GETTER(NoActionState)
+MOZ_IMPL_STATE_CLASS_GETTER(PressCaretState)
+MOZ_IMPL_STATE_CLASS_GETTER(DragCaretState)
+MOZ_IMPL_STATE_CLASS_GETTER(PressNoCaretState)
+MOZ_IMPL_STATE_CLASS_GETTER(ScrollState)
+MOZ_IMPL_STATE_CLASS_GETTER(PostScrollState)
+MOZ_IMPL_STATE_CLASS_GETTER(LongTapState)
+
+bool AccessibleCaretEventHub::sUseLongTapInjector = false;
+
+AccessibleCaretEventHub::AccessibleCaretEventHub(nsIPresShell* aPresShell)
+ : mPresShell(aPresShell)
+{
+ static bool prefsAdded = false;
+ if (!prefsAdded) {
+ Preferences::AddBoolVarCache(
+ &sUseLongTapInjector, "layout.accessiblecaret.use_long_tap_injector");
+ prefsAdded = true;
+ }
+}
+
+AccessibleCaretEventHub::~AccessibleCaretEventHub()
+{
+}
+
+void
+AccessibleCaretEventHub::Init()
+{
+ if (mInitialized && mManager) {
+ mManager->OnFrameReconstruction();
+ }
+
+ if (mInitialized || !mPresShell || !mPresShell->GetCanvasFrame() ||
+ !mPresShell->GetCanvasFrame()->GetCustomContentContainer()) {
+ return;
+ }
+
+ // Without nsAutoScriptBlocker, the script might be run after constructing
+ // mFirstCaret in AccessibleCaretManager's constructor, which might destructs
+ // the whole frame tree. Therefore we'll fail to construct mSecondCaret
+ // because we cannot get root frame or canvas frame from mPresShell to inject
+ // anonymous content. To avoid that, we protect Init() by nsAutoScriptBlocker.
+ // To reproduce, run "./mach crashtest layout/base/crashtests/897852.html"
+ // without the following scriptBlocker.
+ nsAutoScriptBlocker scriptBlocker;
+
+ nsPresContext* presContext = mPresShell->GetPresContext();
+ MOZ_ASSERT(presContext, "PresContext should be given in PresShell::Init()");
+
+ nsIDocShell* docShell = presContext->GetDocShell();
+ if (!docShell) {
+ return;
+ }
+
+ docShell->AddWeakReflowObserver(this);
+ docShell->AddWeakScrollObserver(this);
+
+ mDocShell = static_cast<nsDocShell*>(docShell);
+
+ if (sUseLongTapInjector) {
+ mLongTapInjectorTimer = do_CreateInstance("@mozilla.org/timer;1");
+ }
+
+ mScrollEndInjectorTimer = do_CreateInstance("@mozilla.org/timer;1");
+
+ mManager = MakeUnique<AccessibleCaretManager>(mPresShell);
+
+ mInitialized = true;
+}
+
+void
+AccessibleCaretEventHub::Terminate()
+{
+ if (!mInitialized) {
+ return;
+ }
+
+ RefPtr<nsDocShell> docShell(mDocShell.get());
+ if (docShell) {
+ docShell->RemoveWeakReflowObserver(this);
+ docShell->RemoveWeakScrollObserver(this);
+ }
+
+ if (mLongTapInjectorTimer) {
+ mLongTapInjectorTimer->Cancel();
+ }
+
+ if (mScrollEndInjectorTimer) {
+ mScrollEndInjectorTimer->Cancel();
+ }
+
+ mManager->Terminate();
+ mPresShell = nullptr;
+ mInitialized = false;
+}
+
+nsEventStatus
+AccessibleCaretEventHub::HandleEvent(WidgetEvent* aEvent)
+{
+ nsEventStatus status = nsEventStatus_eIgnore;
+
+ if (!mInitialized) {
+ return status;
+ }
+
+ MOZ_ASSERT(mRefCnt.get() > 1, "Expect caller holds us as well!");
+
+ switch (aEvent->mClass) {
+ case eMouseEventClass:
+ status = HandleMouseEvent(aEvent->AsMouseEvent());
+ break;
+
+ case eTouchEventClass:
+ status = HandleTouchEvent(aEvent->AsTouchEvent());
+ break;
+
+ case eKeyboardEventClass:
+ status = HandleKeyboardEvent(aEvent->AsKeyboardEvent());
+ break;
+
+ default:
+ break;
+ }
+
+ return status;
+}
+
+nsEventStatus
+AccessibleCaretEventHub::HandleMouseEvent(WidgetMouseEvent* aEvent)
+{
+ nsEventStatus rv = nsEventStatus_eIgnore;
+
+ if (aEvent->button != WidgetMouseEvent::eLeftButton) {
+ return rv;
+ }
+
+ int32_t id =
+ (mActiveTouchId == kInvalidTouchId ? kDefaultTouchId : mActiveTouchId);
+ nsPoint point = GetMouseEventPosition(aEvent);
+
+ if (aEvent->mMessage == eMouseDown ||
+ aEvent->mMessage == eMouseUp ||
+ aEvent->mMessage == eMouseClick ||
+ aEvent->mMessage == eMouseDoubleClick ||
+ aEvent->mMessage == eMouseLongTap) {
+ // Don't reset the source on mouse movement since that can
+ // happen anytime, even randomly during a touch sequence.
+ mManager->SetLastInputSource(aEvent->inputSource);
+ }
+
+ switch (aEvent->mMessage) {
+ case eMouseDown:
+ AC_LOGV("Before eMouseDown, state: %s", mState->Name());
+ rv = mState->OnPress(this, point, id, eMouseEventClass);
+ AC_LOGV("After eMouseDown, state: %s, consume: %d", mState->Name(), rv);
+ break;
+
+ case eMouseMove:
+ AC_LOGV("Before eMouseMove, state: %s", mState->Name());
+ rv = mState->OnMove(this, point);
+ AC_LOGV("After eMouseMove, state: %s, consume: %d", mState->Name(), rv);
+ break;
+
+ case eMouseUp:
+ AC_LOGV("Before eMouseUp, state: %s", mState->Name());
+ rv = mState->OnRelease(this);
+ AC_LOGV("After eMouseUp, state: %s, consume: %d", mState->Name(), rv);
+ break;
+
+ case eMouseLongTap:
+ AC_LOGV("Before eMouseLongTap, state: %s", mState->Name());
+ rv = mState->OnLongTap(this, point);
+ AC_LOGV("After eMouseLongTap, state: %s, consume: %d", mState->Name(),
+ rv);
+ break;
+
+ default:
+ break;
+ }
+
+ return rv;
+}
+
+nsEventStatus
+AccessibleCaretEventHub::HandleTouchEvent(WidgetTouchEvent* aEvent)
+{
+ if (aEvent->mTouches.IsEmpty()) {
+ AC_LOG("%s: Receive a touch event without any touch data!", __FUNCTION__);
+ return nsEventStatus_eIgnore;
+ }
+
+ nsEventStatus rv = nsEventStatus_eIgnore;
+
+ int32_t id =
+ (mActiveTouchId == kInvalidTouchId ? aEvent->mTouches[0]->Identifier()
+ : mActiveTouchId);
+ nsPoint point = GetTouchEventPosition(aEvent, id);
+
+ mManager->SetLastInputSource(nsIDOMMouseEvent::MOZ_SOURCE_TOUCH);
+
+ switch (aEvent->mMessage) {
+ case eTouchStart:
+ AC_LOGV("Before eTouchStart, state: %s", mState->Name());
+ rv = mState->OnPress(this, point, id, eTouchEventClass);
+ AC_LOGV("After eTouchStart, state: %s, consume: %d", mState->Name(), rv);
+ break;
+
+ case eTouchMove:
+ AC_LOGV("Before eTouchMove, state: %s", mState->Name());
+ rv = mState->OnMove(this, point);
+ AC_LOGV("After eTouchMove, state: %s, consume: %d", mState->Name(), rv);
+ break;
+
+ case eTouchEnd:
+ AC_LOGV("Before eTouchEnd, state: %s", mState->Name());
+ rv = mState->OnRelease(this);
+ AC_LOGV("After eTouchEnd, state: %s, consume: %d", mState->Name(), rv);
+ break;
+
+ case eTouchCancel:
+ AC_LOGV("Got eTouchCancel, state: %s", mState->Name());
+ // Do nothing since we don't really care eTouchCancel anyway.
+ break;
+
+ default:
+ break;
+ }
+
+ return rv;
+}
+
+nsEventStatus
+AccessibleCaretEventHub::HandleKeyboardEvent(WidgetKeyboardEvent* aEvent)
+{
+ mManager->SetLastInputSource(nsIDOMMouseEvent::MOZ_SOURCE_KEYBOARD);
+
+ switch (aEvent->mMessage) {
+ case eKeyUp:
+ AC_LOGV("eKeyUp, state: %s", mState->Name());
+ mManager->OnKeyboardEvent();
+ break;
+
+ case eKeyDown:
+ AC_LOGV("eKeyDown, state: %s", mState->Name());
+ mManager->OnKeyboardEvent();
+ break;
+
+ case eKeyPress:
+ AC_LOGV("eKeyPress, state: %s", mState->Name());
+ mManager->OnKeyboardEvent();
+ break;
+
+ default:
+ break;
+ }
+
+ return nsEventStatus_eIgnore;
+}
+
+bool
+AccessibleCaretEventHub::MoveDistanceIsLarge(const nsPoint& aPoint) const
+{
+ nsPoint delta = aPoint - mPressPoint;
+ return NS_hypot(delta.x, delta.y) >
+ nsPresContext::AppUnitsPerCSSPixel() * kMoveStartToleranceInPixel;
+}
+
+void
+AccessibleCaretEventHub::LaunchLongTapInjector()
+{
+ if (!mLongTapInjectorTimer) {
+ return;
+ }
+
+ int32_t longTapDelay = gfxPrefs::UiClickHoldContextMenusDelay();
+ mLongTapInjectorTimer->InitWithFuncCallback(FireLongTap, this, longTapDelay,
+ nsITimer::TYPE_ONE_SHOT);
+}
+
+void
+AccessibleCaretEventHub::CancelLongTapInjector()
+{
+ if (!mLongTapInjectorTimer) {
+ return;
+ }
+
+ mLongTapInjectorTimer->Cancel();
+}
+
+/* static */ void
+AccessibleCaretEventHub::FireLongTap(nsITimer* aTimer,
+ void* aAccessibleCaretEventHub)
+{
+ auto* self = static_cast<AccessibleCaretEventHub*>(aAccessibleCaretEventHub);
+ self->mState->OnLongTap(self, self->mPressPoint);
+}
+
+NS_IMETHODIMP
+AccessibleCaretEventHub::Reflow(DOMHighResTimeStamp aStart,
+ DOMHighResTimeStamp aEnd)
+{
+ if (!mInitialized) {
+ return NS_OK;
+ }
+
+ MOZ_ASSERT(mRefCnt.get() > 1, "Expect caller holds us as well!");
+
+ if (mIsInReflowCallback) {
+ return NS_OK;
+ }
+
+ AutoRestore<bool> autoRestoreIsInReflowCallback(mIsInReflowCallback);
+ mIsInReflowCallback = true;
+
+ AC_LOG("%s, state: %s", __FUNCTION__, mState->Name());
+ mState->OnReflow(this);
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+AccessibleCaretEventHub::ReflowInterruptible(DOMHighResTimeStamp aStart,
+ DOMHighResTimeStamp aEnd)
+{
+ // Defer the error checking to Reflow().
+ return Reflow(aStart, aEnd);
+}
+
+void
+AccessibleCaretEventHub::AsyncPanZoomStarted()
+{
+ if (!mInitialized) {
+ return;
+ }
+
+ MOZ_ASSERT(mRefCnt.get() > 1, "Expect caller holds us as well!");
+
+ AC_LOG("%s, state: %s", __FUNCTION__, mState->Name());
+ mState->OnScrollStart(this);
+}
+
+void
+AccessibleCaretEventHub::AsyncPanZoomStopped()
+{
+ if (!mInitialized) {
+ return;
+ }
+
+ MOZ_ASSERT(mRefCnt.get() > 1, "Expect caller holds us as well!");
+
+ AC_LOG("%s, state: %s", __FUNCTION__, mState->Name());
+ mState->OnScrollEnd(this);
+}
+
+void
+AccessibleCaretEventHub::ScrollPositionChanged()
+{
+ if (!mInitialized) {
+ return;
+ }
+
+ MOZ_ASSERT(mRefCnt.get() > 1, "Expect caller holds us as well!");
+
+ AC_LOG("%s, state: %s", __FUNCTION__, mState->Name());
+ mState->OnScrollPositionChanged(this);
+}
+
+void
+AccessibleCaretEventHub::LaunchScrollEndInjector()
+{
+ if (!mScrollEndInjectorTimer) {
+ return;
+ }
+
+ mScrollEndInjectorTimer->InitWithFuncCallback(
+ FireScrollEnd, this, kScrollEndTimerDelay, nsITimer::TYPE_ONE_SHOT);
+}
+
+void
+AccessibleCaretEventHub::CancelScrollEndInjector()
+{
+ if (!mScrollEndInjectorTimer) {
+ return;
+ }
+
+ mScrollEndInjectorTimer->Cancel();
+}
+
+/* static */ void
+AccessibleCaretEventHub::FireScrollEnd(nsITimer* aTimer,
+ void* aAccessibleCaretEventHub)
+{
+ auto* self = static_cast<AccessibleCaretEventHub*>(aAccessibleCaretEventHub);
+ self->mState->OnScrollEnd(self);
+}
+
+nsresult
+AccessibleCaretEventHub::NotifySelectionChanged(nsIDOMDocument* aDoc,
+ nsISelection* aSel,
+ int16_t aReason)
+{
+ if (!mInitialized) {
+ return NS_OK;
+ }
+
+ MOZ_ASSERT(mRefCnt.get() > 1, "Expect caller holds us as well!");
+
+ AC_LOG("%s, state: %s, reason: %d", __FUNCTION__, mState->Name(), aReason);
+ mState->OnSelectionChanged(this, aDoc, aSel, aReason);
+ return NS_OK;
+}
+
+void
+AccessibleCaretEventHub::NotifyBlur(bool aIsLeavingDocument)
+{
+ if (!mInitialized) {
+ return;
+ }
+
+ MOZ_ASSERT(mRefCnt.get() > 1, "Expect caller holds us as well!");
+
+ AC_LOG("%s, state: %s", __FUNCTION__, mState->Name());
+ mState->OnBlur(this, aIsLeavingDocument);
+}
+
+nsPoint
+AccessibleCaretEventHub::GetTouchEventPosition(WidgetTouchEvent* aEvent,
+ int32_t aIdentifier) const
+{
+ for (dom::Touch* touch : aEvent->mTouches) {
+ if (touch->Identifier() == aIdentifier) {
+ LayoutDeviceIntPoint touchIntPoint = touch->mRefPoint;
+
+ // Get event coordinate relative to root frame.
+ nsIFrame* rootFrame = mPresShell->GetRootFrame();
+ return nsLayoutUtils::GetEventCoordinatesRelativeTo(aEvent, touchIntPoint,
+ rootFrame);
+ }
+ }
+ return nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
+}
+
+nsPoint
+AccessibleCaretEventHub::GetMouseEventPosition(WidgetMouseEvent* aEvent) const
+{
+ LayoutDeviceIntPoint mouseIntPoint = aEvent->AsGUIEvent()->mRefPoint;
+
+ // Get event coordinate relative to root frame.
+ nsIFrame* rootFrame = mPresShell->GetRootFrame();
+ return nsLayoutUtils::GetEventCoordinatesRelativeTo(aEvent, mouseIntPoint,
+ rootFrame);
+}
+
+} // namespace mozilla