776 lines
21 KiB
C++
776 lines
21 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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#include "AccessibleCaretEventHub.h"
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#include "AccessibleCaretLogger.h"
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#include "AccessibleCaretManager.h"
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#include "Layers.h"
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#include "gfxPrefs.h"
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#include "mozilla/MouseEvents.h"
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#include "mozilla/TextEvents.h"
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#include "mozilla/TouchEvents.h"
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#include "mozilla/Preferences.h"
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#include "nsDocShell.h"
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#include "nsFocusManager.h"
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#include "nsFrameSelection.h"
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#include "nsITimer.h"
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#include "nsPresContext.h"
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namespace mozilla {
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#undef AC_LOG
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#define AC_LOG(message, ...) \
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AC_LOG_BASE("AccessibleCaretEventHub (%p): " message, this, ##__VA_ARGS__);
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#undef AC_LOGV
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#define AC_LOGV(message, ...) \
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AC_LOGV_BASE("AccessibleCaretEventHub (%p): " message, this, ##__VA_ARGS__);
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NS_IMPL_ISUPPORTS(AccessibleCaretEventHub, nsIReflowObserver, nsIScrollObserver,
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nsISelectionListener, nsISupportsWeakReference);
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// -----------------------------------------------------------------------------
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// NoActionState
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//
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class AccessibleCaretEventHub::NoActionState
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: public AccessibleCaretEventHub::State
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{
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public:
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virtual const char* Name() const override { return "NoActionState"; }
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virtual nsEventStatus OnPress(AccessibleCaretEventHub* aContext,
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const nsPoint& aPoint,
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int32_t aTouchId) override
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{
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nsEventStatus rv = nsEventStatus_eIgnore;
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if (NS_SUCCEEDED(aContext->mManager->PressCaret(aPoint))) {
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aContext->SetState(aContext->PressCaretState());
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rv = nsEventStatus_eConsumeNoDefault;
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} else {
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aContext->SetState(aContext->PressNoCaretState());
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}
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aContext->mPressPoint = aPoint;
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aContext->mActiveTouchId = aTouchId;
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return rv;
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}
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virtual void OnScrollStart(AccessibleCaretEventHub* aContext) override
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{
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aContext->mManager->OnScrollStart();
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aContext->SetState(aContext->ScrollState());
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}
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virtual void OnScrollPositionChanged(AccessibleCaretEventHub* aContext) override
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{
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aContext->mManager->OnScrollPositionChanged();
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}
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virtual void OnSelectionChanged(AccessibleCaretEventHub* aContext,
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nsIDOMDocument* aDoc, nsISelection* aSel,
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int16_t aReason) override
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{
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aContext->mManager->OnSelectionChanged(aDoc, aSel, aReason);
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}
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virtual void OnBlur(AccessibleCaretEventHub* aContext,
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bool aIsLeavingDocument) override
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{
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aContext->mManager->OnBlur();
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}
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virtual void OnReflow(AccessibleCaretEventHub* aContext) override
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{
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aContext->mManager->OnReflow();
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}
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virtual void Enter(AccessibleCaretEventHub* aContext) override
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{
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aContext->mPressPoint = nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
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aContext->mActiveTouchId = kInvalidTouchId;
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}
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};
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// -----------------------------------------------------------------------------
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// PressCaretState: Always consume the event since we've pressed on the caret.
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//
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class AccessibleCaretEventHub::PressCaretState
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: public AccessibleCaretEventHub::State
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{
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public:
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virtual const char* Name() const override { return "PressCaretState"; }
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virtual nsEventStatus OnMove(AccessibleCaretEventHub* aContext,
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const nsPoint& aPoint) override
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{
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if (aContext->MoveDistanceIsLarge(aPoint)) {
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if (NS_SUCCEEDED(aContext->mManager->DragCaret(aPoint))) {
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aContext->SetState(aContext->DragCaretState());
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}
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}
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return nsEventStatus_eConsumeNoDefault;
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}
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virtual nsEventStatus OnRelease(AccessibleCaretEventHub* aContext) override
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{
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aContext->mManager->ReleaseCaret();
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aContext->mManager->TapCaret(aContext->mPressPoint);
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aContext->SetState(aContext->NoActionState());
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return nsEventStatus_eConsumeNoDefault;
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}
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virtual nsEventStatus OnLongTap(AccessibleCaretEventHub* aContext,
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const nsPoint& aPoint) override
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{
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return nsEventStatus_eConsumeNoDefault;
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}
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};
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// -----------------------------------------------------------------------------
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// DragCaretState: Always consume the event since we've pressed on the caret.
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//
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class AccessibleCaretEventHub::DragCaretState
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: public AccessibleCaretEventHub::State
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{
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public:
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virtual const char* Name() const override { return "DragCaretState"; }
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virtual nsEventStatus OnMove(AccessibleCaretEventHub* aContext,
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const nsPoint& aPoint) override
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{
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aContext->mManager->DragCaret(aPoint);
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return nsEventStatus_eConsumeNoDefault;
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}
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virtual nsEventStatus OnRelease(AccessibleCaretEventHub* aContext) override
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{
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aContext->mManager->ReleaseCaret();
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aContext->SetState(aContext->NoActionState());
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return nsEventStatus_eConsumeNoDefault;
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}
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};
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// -----------------------------------------------------------------------------
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// PressNoCaretState
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//
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class AccessibleCaretEventHub::PressNoCaretState
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: public AccessibleCaretEventHub::State
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{
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public:
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virtual const char* Name() const override { return "PressNoCaretState"; }
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virtual nsEventStatus OnMove(AccessibleCaretEventHub* aContext,
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const nsPoint& aPoint) override
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{
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if (aContext->MoveDistanceIsLarge(aPoint)) {
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aContext->SetState(aContext->NoActionState());
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}
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return nsEventStatus_eIgnore;
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}
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virtual nsEventStatus OnRelease(AccessibleCaretEventHub* aContext) override
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{
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aContext->SetState(aContext->NoActionState());
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return nsEventStatus_eIgnore;
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}
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virtual nsEventStatus OnLongTap(AccessibleCaretEventHub* aContext,
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const nsPoint& aPoint) override
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{
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aContext->SetState(aContext->LongTapState());
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return aContext->GetState()->OnLongTap(aContext, aPoint);
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}
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virtual void OnScrollStart(AccessibleCaretEventHub* aContext) override
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{
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aContext->mManager->OnScrollStart();
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aContext->SetState(aContext->ScrollState());
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}
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virtual void OnBlur(AccessibleCaretEventHub* aContext,
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bool aIsLeavingDocument) override
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{
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aContext->mManager->OnBlur();
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if (aIsLeavingDocument) {
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aContext->SetState(aContext->NoActionState());
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}
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}
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virtual void OnSelectionChanged(AccessibleCaretEventHub* aContext,
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nsIDOMDocument* aDoc, nsISelection* aSel,
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int16_t aReason) override
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{
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aContext->mManager->OnSelectionChanged(aDoc, aSel, aReason);
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}
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virtual void OnReflow(AccessibleCaretEventHub* aContext) override
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{
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aContext->mManager->OnReflow();
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}
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virtual void Enter(AccessibleCaretEventHub* aContext) override
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{
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aContext->LaunchLongTapInjector();
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}
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virtual void Leave(AccessibleCaretEventHub* aContext) override
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{
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aContext->CancelLongTapInjector();
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}
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};
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// -----------------------------------------------------------------------------
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// ScrollState
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//
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class AccessibleCaretEventHub::ScrollState
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: public AccessibleCaretEventHub::State
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{
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public:
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virtual const char* Name() const override { return "ScrollState"; }
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virtual void OnScrollEnd(AccessibleCaretEventHub* aContext) override
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{
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aContext->SetState(aContext->PostScrollState());
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}
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virtual void OnBlur(AccessibleCaretEventHub* aContext,
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bool aIsLeavingDocument) override
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{
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aContext->mManager->OnBlur();
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if (aIsLeavingDocument) {
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aContext->SetState(aContext->NoActionState());
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}
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}
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};
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// -----------------------------------------------------------------------------
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// PostScrollState: In this state, we are waiting for another APZ start or press
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// event.
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//
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class AccessibleCaretEventHub::PostScrollState
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: public AccessibleCaretEventHub::State
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{
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public:
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virtual const char* Name() const override { return "PostScrollState"; }
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virtual nsEventStatus OnPress(AccessibleCaretEventHub* aContext,
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const nsPoint& aPoint,
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int32_t aTouchId) override
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{
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aContext->mManager->OnScrollEnd();
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aContext->SetState(aContext->NoActionState());
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return aContext->GetState()->OnPress(aContext, aPoint, aTouchId);
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}
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virtual void OnScrollStart(AccessibleCaretEventHub* aContext) override
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{
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aContext->SetState(aContext->ScrollState());
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}
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virtual void OnScrollEnd(AccessibleCaretEventHub* aContext) override
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{
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aContext->mManager->OnScrollEnd();
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aContext->SetState(aContext->NoActionState());
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}
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virtual void OnBlur(AccessibleCaretEventHub* aContext,
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bool aIsLeavingDocument) override
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{
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aContext->mManager->OnBlur();
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if (aIsLeavingDocument) {
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aContext->SetState(aContext->NoActionState());
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}
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}
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virtual void Enter(AccessibleCaretEventHub* aContext) override
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{
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// Launch the injector to leave PostScrollState.
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aContext->LaunchScrollEndInjector();
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}
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virtual void Leave(AccessibleCaretEventHub* aContext) override
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{
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aContext->CancelScrollEndInjector();
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}
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};
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// -----------------------------------------------------------------------------
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// LongTapState
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//
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class AccessibleCaretEventHub::LongTapState
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: public AccessibleCaretEventHub::State
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{
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public:
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virtual const char* Name() const override { return "LongTapState"; }
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virtual nsEventStatus OnLongTap(AccessibleCaretEventHub* aContext,
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const nsPoint& aPoint) override
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{
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nsEventStatus rv = nsEventStatus_eIgnore;
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if (NS_SUCCEEDED(aContext->mManager->SelectWordOrShortcut(aPoint))) {
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rv = nsEventStatus_eConsumeNoDefault;
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}
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aContext->SetState(aContext->NoActionState());
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return rv;
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}
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virtual void OnReflow(AccessibleCaretEventHub* aContext) override
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{
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aContext->mManager->OnReflow();
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}
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};
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// -----------------------------------------------------------------------------
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// Implementation of AccessibleCaretEventHub methods
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//
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AccessibleCaretEventHub::State*
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AccessibleCaretEventHub::GetState() const
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{
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return mState;
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}
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void
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AccessibleCaretEventHub::SetState(State* aState)
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{
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MOZ_ASSERT(aState);
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AC_LOG("%s -> %s", mState->Name(), aState->Name());
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mState->Leave(this);
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mState = aState;
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mState->Enter(this);
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}
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MOZ_IMPL_STATE_CLASS_GETTER(NoActionState)
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MOZ_IMPL_STATE_CLASS_GETTER(PressCaretState)
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MOZ_IMPL_STATE_CLASS_GETTER(DragCaretState)
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MOZ_IMPL_STATE_CLASS_GETTER(PressNoCaretState)
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MOZ_IMPL_STATE_CLASS_GETTER(ScrollState)
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MOZ_IMPL_STATE_CLASS_GETTER(PostScrollState)
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MOZ_IMPL_STATE_CLASS_GETTER(LongTapState)
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bool AccessibleCaretEventHub::sUseLongTapInjector = true;
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AccessibleCaretEventHub::AccessibleCaretEventHub(nsIPresShell* aPresShell)
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: mPresShell(aPresShell)
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{
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static bool prefsAdded = false;
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if (!prefsAdded) {
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Preferences::AddBoolVarCache(&sUseLongTapInjector,
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"layout.accessiblecaret.use_long_tap_injector");
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prefsAdded = true;
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}
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}
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AccessibleCaretEventHub::~AccessibleCaretEventHub()
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{
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}
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void
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AccessibleCaretEventHub::Init()
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{
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if (mInitialized || !mPresShell || !mPresShell->GetCanvasFrame() ||
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!mPresShell->GetCanvasFrame()->GetCustomContentContainer()) {
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return;
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}
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// Without nsAutoScriptBlocker, the script might be run after constructing
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// mFirstCaret in AccessibleCaretManager's constructor, which might destructs
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// the whole frame tree. Therefore we'll fail to construct mSecondCaret
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// because we cannot get root frame or canvas frame from mPresShell to inject
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// anonymous content. To avoid that, we protect Init() by nsAutoScriptBlocker.
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// To reproduce, run "./mach crashtest layout/base/crashtests/897852.html"
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// without the following scriptBlocker.
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nsAutoScriptBlocker scriptBlocker;
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nsPresContext* presContext = mPresShell->GetPresContext();
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MOZ_ASSERT(presContext, "PresContext should be given in PresShell::Init()");
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nsIDocShell* docShell = presContext->GetDocShell();
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if (!docShell) {
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return;
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}
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docShell->AddWeakReflowObserver(this);
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docShell->AddWeakScrollObserver(this);
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mDocShell = static_cast<nsDocShell*>(docShell);
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if (sUseLongTapInjector) {
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mLongTapInjectorTimer = do_CreateInstance("@mozilla.org/timer;1");
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}
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mScrollEndInjectorTimer = do_CreateInstance("@mozilla.org/timer;1");
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mManager = MakeUnique<AccessibleCaretManager>(mPresShell);
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mInitialized = true;
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}
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void
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AccessibleCaretEventHub::Terminate()
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{
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if (!mInitialized) {
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return;
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}
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RefPtr<nsDocShell> docShell(mDocShell.get());
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if (docShell) {
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docShell->RemoveWeakReflowObserver(this);
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docShell->RemoveWeakScrollObserver(this);
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}
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if (mLongTapInjectorTimer) {
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mLongTapInjectorTimer->Cancel();
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}
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if (mScrollEndInjectorTimer) {
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mScrollEndInjectorTimer->Cancel();
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}
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mManager = nullptr;
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mPresShell = nullptr;
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mInitialized = false;
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}
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nsEventStatus
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AccessibleCaretEventHub::HandleEvent(WidgetEvent* aEvent)
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{
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nsEventStatus status = nsEventStatus_eIgnore;
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if (!mInitialized) {
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return status;
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}
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switch (aEvent->mClass) {
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case eMouseEventClass:
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status = HandleMouseEvent(aEvent->AsMouseEvent());
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break;
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case eTouchEventClass:
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status = HandleTouchEvent(aEvent->AsTouchEvent());
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break;
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case eKeyboardEventClass:
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status = HandleKeyboardEvent(aEvent->AsKeyboardEvent());
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break;
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default:
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break;
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}
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return status;
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}
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nsEventStatus
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AccessibleCaretEventHub::HandleMouseEvent(WidgetMouseEvent* aEvent)
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{
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nsEventStatus rv = nsEventStatus_eIgnore;
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if (aEvent->button != WidgetMouseEvent::eLeftButton) {
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return rv;
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}
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int32_t id = (mActiveTouchId == kInvalidTouchId ?
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kDefaultTouchId : mActiveTouchId);
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nsPoint point = GetMouseEventPosition(aEvent);
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switch (aEvent->mMessage) {
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case eMouseDown:
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AC_LOGV("Before eMouseDown, state: %s", mState->Name());
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rv = mState->OnPress(this, point, id);
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AC_LOGV("After eMouseDown, state: %s, consume: %d",
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mState->Name(), rv);
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break;
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case eMouseMove:
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AC_LOGV("Before eMouseMove, state: %s", mState->Name());
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rv = mState->OnMove(this, point);
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AC_LOGV("After eMouseMove, state: %s, consume: %d", mState->Name(), rv);
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break;
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case eMouseUp:
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AC_LOGV("Before eMouseUp, state: %s", mState->Name());
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rv = mState->OnRelease(this);
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AC_LOGV("After eMouseUp, state: %s, consume: %d", mState->Name(),
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rv);
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break;
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case eMouseLongTap:
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AC_LOGV("Before eMouseLongTap, state: %s", mState->Name());
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rv = mState->OnLongTap(this, point);
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AC_LOGV("After eMouseLongTap, state: %s, consume: %d", mState->Name(),
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rv);
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break;
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default:
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break;
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}
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return rv;
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}
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nsEventStatus
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AccessibleCaretEventHub::HandleTouchEvent(WidgetTouchEvent* aEvent)
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{
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nsEventStatus rv = nsEventStatus_eIgnore;
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int32_t id = (mActiveTouchId == kInvalidTouchId ?
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aEvent->touches[0]->Identifier() : mActiveTouchId);
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nsPoint point = GetTouchEventPosition(aEvent, id);
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switch (aEvent->mMessage) {
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case eTouchStart:
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AC_LOGV("Before eTouchStart, state: %s", mState->Name());
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rv = mState->OnPress(this, point, id);
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AC_LOGV("After eTouchStart, state: %s, consume: %d", mState->Name(), rv);
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break;
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case eTouchMove:
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AC_LOGV("Before eTouchMove, state: %s", mState->Name());
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rv = mState->OnMove(this, point);
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AC_LOGV("After eTouchMove, state: %s, consume: %d", mState->Name(), rv);
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break;
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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("Before eTouchCancel, state: %s", mState->Name());
|
|
rv = mState->OnRelease(this);
|
|
AC_LOGV("After eTouchCancel, state: %s, consume: %d", mState->Name(),
|
|
rv);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
nsEventStatus
|
|
AccessibleCaretEventHub::HandleKeyboardEvent(WidgetKeyboardEvent* aEvent)
|
|
{
|
|
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;
|
|
}
|
|
|
|
AC_LOG("%s, state: %s", __FUNCTION__, mState->Name());
|
|
mState->OnReflow(this);
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
AccessibleCaretEventHub::ReflowInterruptible(DOMHighResTimeStamp aStart,
|
|
DOMHighResTimeStamp aEnd)
|
|
{
|
|
if (!mInitialized) {
|
|
return NS_OK;
|
|
}
|
|
|
|
return Reflow(aStart, aEnd);
|
|
}
|
|
|
|
void
|
|
AccessibleCaretEventHub::AsyncPanZoomStarted()
|
|
{
|
|
if (!mInitialized) {
|
|
return;
|
|
}
|
|
|
|
AC_LOG("%s, state: %s", __FUNCTION__, mState->Name());
|
|
mState->OnScrollStart(this);
|
|
}
|
|
|
|
void
|
|
AccessibleCaretEventHub::AsyncPanZoomStopped()
|
|
{
|
|
if (!mInitialized) {
|
|
return;
|
|
}
|
|
|
|
AC_LOG("%s, state: %s", __FUNCTION__, mState->Name());
|
|
mState->OnScrollEnd(this);
|
|
}
|
|
|
|
void
|
|
AccessibleCaretEventHub::ScrollPositionChanged()
|
|
{
|
|
if (!mInitialized) {
|
|
return;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
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->touches) {
|
|
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()->refPoint;
|
|
|
|
// Get event coordinate relative to root frame.
|
|
nsIFrame* rootFrame = mPresShell->GetRootFrame();
|
|
return nsLayoutUtils::GetEventCoordinatesRelativeTo(aEvent, mouseIntPoint,
|
|
rootFrame);
|
|
}
|
|
|
|
} // namespace mozilla
|