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Diffstat (limited to 'layout/base/AccessibleCaretEventHub.cpp')
| -rw-r--r-- | layout/base/AccessibleCaretEventHub.cpp | 702 |
1 files changed, 702 insertions, 0 deletions
diff --git a/layout/base/AccessibleCaretEventHub.cpp b/layout/base/AccessibleCaretEventHub.cpp new file mode 100644 index 0000000000..d9cd91d866 --- /dev/null +++ b/layout/base/AccessibleCaretEventHub.cpp @@ -0,0 +1,702 @@ +/* -*- 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 "mozilla/AutoRestore.h" +#include "mozilla/PresShell.h" +#include "mozilla/StaticPrefs_layout.h" +#include "mozilla/StaticPrefs_ui.h" +#include "mozilla/TextEvents.h" +#include "mozilla/TouchEvents.h" +#include "mozilla/dom/Document.h" +#include "mozilla/dom/MouseEventBinding.h" +#include "mozilla/dom/Selection.h" +#include "nsCanvasFrame.h" +#include "nsDocShell.h" +#include "nsFocusManager.h" +#include "nsFrameSelection.h" +#include "nsITimer.h" +#include "nsLayoutUtils.h" +#include "nsPresContext.h" + +using namespace mozilla; +using namespace mozilla::dom; + +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, + nsISupportsWeakReference); + +// ----------------------------------------------------------------------------- +// NoActionState +// +class AccessibleCaretEventHub::NoActionState + : public AccessibleCaretEventHub::State { + public: + const char* Name() const override { return "NoActionState"; } + + MOZ_CAN_RUN_SCRIPT + 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(AccessibleCaretEventHub::PressCaretState()); + rv = nsEventStatus_eConsumeNoDefault; + } else { + aContext->SetState(AccessibleCaretEventHub::PressNoCaretState()); + } + + aContext->mPressPoint = aPoint; + aContext->mActiveTouchId = aTouchId; + + return rv; + } + + MOZ_CAN_RUN_SCRIPT + void OnScrollStart(AccessibleCaretEventHub* aContext) override { + aContext->mManager->OnScrollStart(); + aContext->SetState(AccessibleCaretEventHub::ScrollState()); + } + + MOZ_CAN_RUN_SCRIPT + void OnScrollPositionChanged(AccessibleCaretEventHub* aContext) override { + aContext->mManager->OnScrollPositionChanged(); + } + + MOZ_CAN_RUN_SCRIPT + void OnSelectionChanged(AccessibleCaretEventHub* aContext, Document* aDoc, + dom::Selection* aSel, int16_t aReason) override { + aContext->mManager->OnSelectionChanged(aDoc, aSel, aReason); + } + + MOZ_CAN_RUN_SCRIPT + void OnBlur(AccessibleCaretEventHub* aContext, + bool aIsLeavingDocument) override { + aContext->mManager->OnBlur(); + } + + MOZ_CAN_RUN_SCRIPT + void OnReflow(AccessibleCaretEventHub* aContext) override { + aContext->mManager->OnReflow(); + } + + void Enter(AccessibleCaretEventHub* aContext) override { + aContext->mPressPoint = nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE); + aContext->mActiveTouchId = kInvalidTouchId; + } +}; + +// ----------------------------------------------------------------------------- +// PressCaretState: Because we've pressed on the caret, always consume the +// event, both real and synthesized, so that other event handling code won't +// have a chance to do something else to interrupt caret dragging. +// +class AccessibleCaretEventHub::PressCaretState + : public AccessibleCaretEventHub::State { + public: + const char* Name() const override { return "PressCaretState"; } + + MOZ_CAN_RUN_SCRIPT + nsEventStatus OnMove(AccessibleCaretEventHub* aContext, const nsPoint& aPoint, + WidgetMouseEvent::Reason aReason) override { + if (aReason == WidgetMouseEvent::eReal && + aContext->MoveDistanceIsLarge(aPoint)) { + if (NS_SUCCEEDED(aContext->mManager->DragCaret(aPoint))) { + aContext->SetState(AccessibleCaretEventHub::DragCaretState()); + } + } + + return nsEventStatus_eConsumeNoDefault; + } + + MOZ_CAN_RUN_SCRIPT + nsEventStatus OnRelease(AccessibleCaretEventHub* aContext) override { + aContext->mManager->ReleaseCaret(); + aContext->mManager->TapCaret(aContext->mPressPoint); + aContext->SetState(AccessibleCaretEventHub::NoActionState()); + + return nsEventStatus_eConsumeNoDefault; + } + + nsEventStatus OnLongTap(AccessibleCaretEventHub* aContext, + const nsPoint& aPoint) override { + return nsEventStatus_eConsumeNoDefault; + } +}; + +// ----------------------------------------------------------------------------- +// DragCaretState: Because we've pressed on the caret, always consume the event, +// both real and synthesized, so that other event handling code won't have a +// chance to do something else to interrupt caret dragging. +// +class AccessibleCaretEventHub::DragCaretState + : public AccessibleCaretEventHub::State { + public: + const char* Name() const override { return "DragCaretState"; } + + MOZ_CAN_RUN_SCRIPT + nsEventStatus OnMove(AccessibleCaretEventHub* aContext, const nsPoint& aPoint, + WidgetMouseEvent::Reason aReason) override { + if (aReason == WidgetMouseEvent::eReal) { + aContext->mManager->DragCaret(aPoint); + } + + return nsEventStatus_eConsumeNoDefault; + } + + MOZ_CAN_RUN_SCRIPT + nsEventStatus OnRelease(AccessibleCaretEventHub* aContext) override { + aContext->mManager->ReleaseCaret(); + aContext->SetState(AccessibleCaretEventHub::NoActionState()); + + return nsEventStatus_eConsumeNoDefault; + } +}; + +// ----------------------------------------------------------------------------- +// PressNoCaretState +// +class AccessibleCaretEventHub::PressNoCaretState + : public AccessibleCaretEventHub::State { + public: + const char* Name() const override { return "PressNoCaretState"; } + + nsEventStatus OnMove(AccessibleCaretEventHub* aContext, const nsPoint& aPoint, + WidgetMouseEvent::Reason aReason) override { + if (aContext->MoveDistanceIsLarge(aPoint)) { + aContext->SetState(AccessibleCaretEventHub::NoActionState()); + } + + return nsEventStatus_eIgnore; + } + + nsEventStatus OnRelease(AccessibleCaretEventHub* aContext) override { + aContext->SetState(AccessibleCaretEventHub::NoActionState()); + + return nsEventStatus_eIgnore; + } + + MOZ_CAN_RUN_SCRIPT + nsEventStatus OnLongTap(AccessibleCaretEventHub* aContext, + const nsPoint& aPoint) override { + aContext->SetState(AccessibleCaretEventHub::LongTapState()); + + return aContext->GetState()->OnLongTap(aContext, aPoint); + } + + MOZ_CAN_RUN_SCRIPT + void OnScrollStart(AccessibleCaretEventHub* aContext) override { + aContext->mManager->OnScrollStart(); + aContext->SetState(AccessibleCaretEventHub::ScrollState()); + } + + MOZ_CAN_RUN_SCRIPT + void OnBlur(AccessibleCaretEventHub* aContext, + bool aIsLeavingDocument) override { + aContext->mManager->OnBlur(); + if (aIsLeavingDocument) { + aContext->SetState(AccessibleCaretEventHub::NoActionState()); + } + } + + MOZ_CAN_RUN_SCRIPT + void OnSelectionChanged(AccessibleCaretEventHub* aContext, Document* aDoc, + dom::Selection* aSel, int16_t aReason) override { + aContext->mManager->OnSelectionChanged(aDoc, aSel, aReason); + } + + MOZ_CAN_RUN_SCRIPT + void OnReflow(AccessibleCaretEventHub* aContext) override { + aContext->mManager->OnReflow(); + } + + void Enter(AccessibleCaretEventHub* aContext) override { + aContext->LaunchLongTapInjector(); + } + + void Leave(AccessibleCaretEventHub* aContext) override { + aContext->CancelLongTapInjector(); + } +}; + +// ----------------------------------------------------------------------------- +// ScrollState +// +class AccessibleCaretEventHub::ScrollState + : public AccessibleCaretEventHub::State { + public: + const char* Name() const override { return "ScrollState"; } + + MOZ_CAN_RUN_SCRIPT + void OnScrollEnd(AccessibleCaretEventHub* aContext) override { + aContext->mManager->OnScrollEnd(); + aContext->SetState(AccessibleCaretEventHub::NoActionState()); + } + + MOZ_CAN_RUN_SCRIPT + void OnScrollPositionChanged(AccessibleCaretEventHub* aContext) override { + aContext->mManager->OnScrollPositionChanged(); + } + + MOZ_CAN_RUN_SCRIPT + void OnBlur(AccessibleCaretEventHub* aContext, + bool aIsLeavingDocument) override { + aContext->mManager->OnBlur(); + if (aIsLeavingDocument) { + aContext->SetState(AccessibleCaretEventHub::NoActionState()); + } + } +}; + +// ----------------------------------------------------------------------------- +// LongTapState +// +class AccessibleCaretEventHub::LongTapState + : public AccessibleCaretEventHub::State { + public: + const char* Name() const override { return "LongTapState"; } + + MOZ_CAN_RUN_SCRIPT + 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; + } + + nsEventStatus OnRelease(AccessibleCaretEventHub* aContext) override { + aContext->SetState(AccessibleCaretEventHub::NoActionState()); + + // Do not consume the release since the press is not consumed in + // PressNoCaretState either. + return nsEventStatus_eIgnore; + } + + MOZ_CAN_RUN_SCRIPT + void OnScrollStart(AccessibleCaretEventHub* aContext) override { + aContext->mManager->OnScrollStart(); + aContext->SetState(AccessibleCaretEventHub::ScrollState()); + } + + MOZ_CAN_RUN_SCRIPT + 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(LongTapState) + +AccessibleCaretEventHub::AccessibleCaretEventHub(PresShell* aPresShell) + : mPresShell(aPresShell) {} + +void AccessibleCaretEventHub::Init() { + if (mInitialized || !mPresShell) { + 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()"); + + nsDocShell* docShell = presContext->GetDocShell(); + if (!docShell) { + return; + } + + docShell->AddWeakReflowObserver(this); + docShell->AddWeakScrollObserver(this); + + mDocShell = static_cast<nsDocShell*>(docShell); + + if (StaticPrefs::layout_accessiblecaret_use_long_tap_injector()) { + mLongTapInjectorTimer = NS_NewTimer(); + } + + mManager = MakeUnique<AccessibleCaretManager>(mPresShell); + + mInitialized = true; +} + +void AccessibleCaretEventHub::Terminate() { + if (!mInitialized) { + return; + } + + if (mDocShell) { + mDocShell->RemoveWeakReflowObserver(this); + mDocShell->RemoveWeakScrollObserver(this); + } + + if (mLongTapInjectorTimer) { + mLongTapInjectorTimer->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: + MOZ_ASSERT_UNREACHABLE( + "PresShell should've filtered unwanted event classes!"); + break; + } + + return status; +} + +nsEventStatus AccessibleCaretEventHub::HandleMouseEvent( + WidgetMouseEvent* aEvent) { + nsEventStatus rv = nsEventStatus_eIgnore; + + if (aEvent->mButton != MouseButton::ePrimary) { + 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->mInputSource); + } + + 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()); + // The mouse move events synthesized from the touch move events can have + // wrong point (bug 1549355). Workaround it by ignoring the events when + // dragging the caret because the caret doesn't really need them. + rv = mState->OnMove(this, point, aEvent->mReason); + 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(MouseEvent_Binding::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()); + // There is no synthesized touch move event. + rv = mState->OnMove(this, point, WidgetMouseEvent::eReal); + 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(MouseEvent_Binding::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) > + AppUnitsPerCSSPixel() * kMoveStartToleranceInPixel; +} + +void AccessibleCaretEventHub::LaunchLongTapInjector() { + if (!mLongTapInjectorTimer) { + return; + } + + int32_t longTapDelay = StaticPrefs::ui_click_hold_context_menus_delay(); + mLongTapInjectorTimer->InitWithNamedFuncCallback( + FireLongTap, this, longTapDelay, nsITimer::TYPE_ONE_SHOT, + "AccessibleCaretEventHub::LaunchLongTapInjector"); +} + +void AccessibleCaretEventHub::CancelLongTapInjector() { + if (!mLongTapInjectorTimer) { + return; + } + + mLongTapInjectorTimer->Cancel(); +} + +/* static */ +void AccessibleCaretEventHub::FireLongTap(nsITimer* aTimer, + void* aAccessibleCaretEventHub) { + RefPtr<AccessibleCaretEventHub> 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::OnSelectionChange(Document* aDoc, + dom::Selection* aSel, + int16_t aReason) { + if (!mInitialized) { + return; + } + + MOZ_ASSERT(mRefCnt.get() > 1, "Expect caller holds us as well!"); + + AC_LOG("%s, state: %s, reason: %d", __FUNCTION__, mState->Name(), aReason); + + // XXX Here we may be in a hot path. So, if we could avoid this virtual call, + // we should do so. + mState->OnSelectionChanged(this, aDoc, aSel, aReason); +} + +bool AccessibleCaretEventHub::ShouldDisableApz() const { + return mManager && mManager->ShouldDisableApz(); +} + +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, RelativeTo{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, + RelativeTo{rootFrame}); +} + +} // namespace mozilla |