widget/PuppetWidget.cpp
author Dorel Luca <dluca@mozilla.com>
Mon, 04 Dec 2017 18:01:09 +0200
changeset 394844 58fec9a96e269a57cc6f84bfe3a6dc6800acd955
parent 394164 b4995dead417b1d9f166bd93751ef56f46a227d2
child 398636 ef2f9e08e01238ae5893951fa13aafdaa3146f45
permissions -rw-r--r--
Backed out 7 changesets (bug 1377007) for failing build bustage on Linux pgo and faling Cpp's jsapi-tests r=backout on a CLOSED TREE Backed out changeset 9428a4ed7dec (bug 1377007) Backed out changeset 4407b43a8aff (bug 1377007) Backed out changeset 65a37a7f78a5 (bug 1377007) Backed out changeset 276fe6d9b716 (bug 1377007) Backed out changeset 1de46e60ffba (bug 1377007) Backed out changeset 893e303e17ec (bug 1377007) Backed out changeset 081a241e25d4 (bug 1377007)

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * vim: sw=2 ts=8 et :
 */
/* 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 "base/basictypes.h"

#include "ClientLayerManager.h"
#include "gfxPlatform.h"
#include "mozilla/dom/TabChild.h"
#include "mozilla/dom/TabGroup.h"
#include "mozilla/gfx/gfxVars.h"
#include "mozilla/Hal.h"
#include "mozilla/IMEStateManager.h"
#include "mozilla/layers/APZChild.h"
#include "mozilla/layers/PLayerTransactionChild.h"
#include "mozilla/layers/WebRenderLayerManager.h"
#include "mozilla/Preferences.h"
#include "mozilla/TextComposition.h"
#include "mozilla/TextEventDispatcher.h"
#include "mozilla/TextEvents.h"
#include "mozilla/Unused.h"
#include "BasicLayers.h"
#include "PuppetWidget.h"
#include "nsContentUtils.h"
#include "nsIWidgetListener.h"
#include "imgIContainer.h"
#include "nsView.h"
#include "nsPrintfCString.h"

using namespace mozilla;
using namespace mozilla::dom;
using namespace mozilla::hal;
using namespace mozilla::gfx;
using namespace mozilla::layers;
using namespace mozilla::widget;

static void
InvalidateRegion(nsIWidget* aWidget, const LayoutDeviceIntRegion& aRegion)
{
  for (auto iter = aRegion.RectIter(); !iter.Done(); iter.Next()) {
    aWidget->Invalidate(iter.Get());
  }
}

/*static*/ already_AddRefed<nsIWidget>
nsIWidget::CreatePuppetWidget(TabChild* aTabChild)
{
  MOZ_ASSERT(!aTabChild || nsIWidget::UsePuppetWidgets(),
             "PuppetWidgets not allowed in this configuration");

  nsCOMPtr<nsIWidget> widget = new PuppetWidget(aTabChild);
  return widget.forget();
}

namespace mozilla {
namespace widget {

static bool
IsPopup(const nsWidgetInitData* aInitData)
{
  return aInitData && aInitData->mWindowType == eWindowType_popup;
}

static bool
MightNeedIMEFocus(const nsWidgetInitData* aInitData)
{
  // In the puppet-widget world, popup widgets are just dummies and
  // shouldn't try to mess with IME state.
#ifdef MOZ_CROSS_PROCESS_IME
  return !IsPopup(aInitData);
#else
  return false;
#endif
}

// Arbitrary, fungible.
const size_t PuppetWidget::kMaxDimension = 4000;

static bool gRemoteDesktopBehaviorEnabled = false;
static bool gRemoteDesktopBehaviorInitialized = false;

NS_IMPL_ISUPPORTS_INHERITED(PuppetWidget, nsBaseWidget
                                        , TextEventDispatcherListener)

PuppetWidget::PuppetWidget(TabChild* aTabChild)
  : mTabChild(aTabChild)
  , mMemoryPressureObserver(nullptr)
  , mDPI(-1)
  , mRounding(1)
  , mDefaultScale(-1)
  , mCursorHotspotX(0)
  , mCursorHotspotY(0)
  , mIgnoreCompositionEvents(false)
{
  // Setting 'Unknown' means "not yet cached".
  mInputContext.mIMEState.mEnabled = IMEState::UNKNOWN;

  if (!gRemoteDesktopBehaviorInitialized) {
    Preferences::AddBoolVarCache(&gRemoteDesktopBehaviorEnabled, "browser.tabs.remote.desktopbehavior", false);
    gRemoteDesktopBehaviorInitialized = true;
  }
}

PuppetWidget::~PuppetWidget()
{
  Destroy();
}

void
PuppetWidget::InfallibleCreate(nsIWidget* aParent,
                               nsNativeWidget aNativeParent,
                               const LayoutDeviceIntRect& aRect,
                               nsWidgetInitData* aInitData)
{
  MOZ_ASSERT(!aNativeParent, "got a non-Puppet native parent");

  BaseCreate(nullptr, aInitData);

  mBounds = aRect;
  mEnabled = true;
  mVisible = true;

  mDrawTarget = gfxPlatform::GetPlatform()->
    CreateOffscreenContentDrawTarget(IntSize(1, 1), SurfaceFormat::B8G8R8A8);

  mNeedIMEStateInit = MightNeedIMEFocus(aInitData);

  PuppetWidget* parent = static_cast<PuppetWidget*>(aParent);
  if (parent) {
    parent->SetChild(this);
    mLayerManager = parent->GetLayerManager();
  }
  else {
    Resize(mBounds.x, mBounds.y, mBounds.width, mBounds.height, false);
  }
  nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
  if (obs) {
    mMemoryPressureObserver = new MemoryPressureObserver(this);
    obs->AddObserver(mMemoryPressureObserver, "memory-pressure", false);
  }
}

nsresult
PuppetWidget::Create(nsIWidget* aParent,
                     nsNativeWidget aNativeParent,
                     const LayoutDeviceIntRect& aRect,
                     nsWidgetInitData* aInitData)
{
  InfallibleCreate(aParent, aNativeParent, aRect, aInitData);
  return NS_OK;
}

void
PuppetWidget::InitIMEState()
{
  MOZ_ASSERT(mTabChild);
  if (mNeedIMEStateInit) {
    mContentCache.Clear();
    mTabChild->SendUpdateContentCache(mContentCache);
    mIMENotificationRequestsOfParent = IMENotificationRequests();
    mNeedIMEStateInit = false;
  }
}

already_AddRefed<nsIWidget>
PuppetWidget::CreateChild(const LayoutDeviceIntRect& aRect,
                          nsWidgetInitData* aInitData,
                          bool aForceUseIWidgetParent)
{
  bool isPopup = IsPopup(aInitData);
  nsCOMPtr<nsIWidget> widget = nsIWidget::CreatePuppetWidget(mTabChild);
  return ((widget &&
           NS_SUCCEEDED(widget->Create(isPopup ? nullptr: this, nullptr, aRect,
                                       aInitData))) ?
          widget.forget() : nullptr);
}

void
PuppetWidget::Destroy()
{
  if (mOnDestroyCalled) {
    return;
  }
  mOnDestroyCalled = true;

  Base::OnDestroy();
  Base::Destroy();
  mPaintTask.Revoke();
  if (mMemoryPressureObserver) {
    mMemoryPressureObserver->Remove();
  }
  mMemoryPressureObserver = nullptr;
  mChild = nullptr;
  if (mLayerManager) {
    mLayerManager->Destroy();
  }
  mLayerManager = nullptr;
  mTabChild = nullptr;
}

void
PuppetWidget::Show(bool aState)
{
  NS_ASSERTION(mEnabled,
               "does it make sense to Show()/Hide() a disabled widget?");

  bool wasVisible = mVisible;
  mVisible = aState;

  if (mChild) {
    mChild->mVisible = aState;
  }

  if (!wasVisible && mVisible) {
    // The previously attached widget listener is handy if
    // we're transitioning from page to page without dropping
    // layers (since we'll continue to show the old layers
    // associated with that old widget listener). If the
    // PuppetWidget was hidden, those layers are dropped,
    // so the previously attached widget listener is really
    // of no use anymore (and is actually actively harmful - see
    // bug 1323586).
    mPreviouslyAttachedWidgetListener = nullptr;
    Resize(mBounds.width, mBounds.height, false);
    Invalidate(mBounds);
  }
}

void
PuppetWidget::Resize(double aWidth,
                     double aHeight,
                     bool   aRepaint)
{
  LayoutDeviceIntRect oldBounds = mBounds;
  mBounds.SizeTo(LayoutDeviceIntSize(NSToIntRound(aWidth),
                                     NSToIntRound(aHeight)));

  if (mChild) {
    mChild->Resize(aWidth, aHeight, aRepaint);
    return;
  }

  // XXX: roc says that |aRepaint| dictates whether or not to
  // invalidate the expanded area
  if (oldBounds.Size() < mBounds.Size() && aRepaint) {
    LayoutDeviceIntRegion dirty(mBounds);
    dirty.Sub(dirty, oldBounds);
    InvalidateRegion(this, dirty);
  }

  // call WindowResized() on both the current listener, and possibly
  // also the previous one if we're in a state where we're drawing that one
  // because the current one is paint suppressed
  if (!oldBounds.IsEqualEdges(mBounds) && mAttachedWidgetListener) {
    if (GetCurrentWidgetListener() &&
        GetCurrentWidgetListener() != mAttachedWidgetListener) {
      GetCurrentWidgetListener()->WindowResized(this, mBounds.width, mBounds.height);
    }
    mAttachedWidgetListener->WindowResized(this, mBounds.width, mBounds.height);
  }
}

nsresult
PuppetWidget::ConfigureChildren(const nsTArray<Configuration>& aConfigurations)
{
  for (uint32_t i = 0; i < aConfigurations.Length(); ++i) {
    const Configuration& configuration = aConfigurations[i];
    PuppetWidget* w = static_cast<PuppetWidget*>(configuration.mChild.get());
    NS_ASSERTION(w->GetParent() == this,
                 "Configured widget is not a child");
    w->SetWindowClipRegion(configuration.mClipRegion, true);
    LayoutDeviceIntRect bounds = w->GetBounds();
    if (bounds.Size() != configuration.mBounds.Size()) {
      w->Resize(configuration.mBounds.x, configuration.mBounds.y,
                configuration.mBounds.width, configuration.mBounds.height,
                true);
    } else if (bounds.TopLeft() != configuration.mBounds.TopLeft()) {
      w->Move(configuration.mBounds.x, configuration.mBounds.y);
    }
    w->SetWindowClipRegion(configuration.mClipRegion, false);
  }
  return NS_OK;
}

nsresult
PuppetWidget::SetFocus(bool aRaise)
{
  if (aRaise && mTabChild) {
    mTabChild->SendRequestFocus(true);
  }

  return NS_OK;
}

void
PuppetWidget::Invalidate(const LayoutDeviceIntRect& aRect)
{
#ifdef DEBUG
  debug_DumpInvalidate(stderr, this, &aRect, "PuppetWidget", 0);
#endif

  if (mChild) {
    mChild->Invalidate(aRect);
    return;
  }

  mDirtyRegion.Or(mDirtyRegion, aRect);

  if (mTabChild && !mDirtyRegion.IsEmpty() && !mPaintTask.IsPending()) {
    mPaintTask = new PaintTask(this);
    nsCOMPtr<nsIRunnable> event(mPaintTask.get());
    mTabChild->TabGroup()->Dispatch(TaskCategory::Other, event.forget());
    return;
  }
}

void
PuppetWidget::InitEvent(WidgetGUIEvent& aEvent, LayoutDeviceIntPoint* aPoint)
{
  if (nullptr == aPoint) {
    aEvent.mRefPoint = LayoutDeviceIntPoint(0, 0);
  } else {
    // use the point override if provided
    aEvent.mRefPoint = *aPoint;
  }
  aEvent.mTime = PR_Now() / 1000;
}

nsresult
PuppetWidget::DispatchEvent(WidgetGUIEvent* aEvent, nsEventStatus& aStatus)
{
#ifdef DEBUG
  debug_DumpEvent(stdout, aEvent->mWidget, aEvent, "PuppetWidget", 0);
#endif

  MOZ_ASSERT(!mChild || mChild->mWindowType == eWindowType_popup,
             "Unexpected event dispatch!");

  MOZ_ASSERT(!aEvent->AsKeyboardEvent() ||
             aEvent->mFlags.mIsSynthesizedForTests ||
             aEvent->AsKeyboardEvent()->AreAllEditCommandsInitialized(),
    "Non-sysnthesized keyboard events should have edit commands for all types "
    "before dispatched");

  if (aEvent->mClass == eCompositionEventClass) {
    // If we've already requested to commit/cancel the latest composition,
    // TextComposition for the old composition has been destroyed.  Then,
    // the DOM tree needs to listen to next eCompositionStart and its
    // following events.  So, until we meet new eCompositionStart, let's
    // discard all unnecessary composition events here.
    if (mIgnoreCompositionEvents) {
      if (aEvent->mMessage != eCompositionStart) {
        aStatus = nsEventStatus_eIgnore;
        return NS_OK;
      }
      // Now, we receive new eCompositionStart.  Let's restart to handle
      // composition in this process.
      mIgnoreCompositionEvents = false;
    }
    // Store the latest native IME context of parent process's widget or
    // TextEventDispatcher if it's in this process.
    WidgetCompositionEvent* compositionEvent = aEvent->AsCompositionEvent();
#ifdef DEBUG
    if (mNativeIMEContext.IsValid() &&
        mNativeIMEContext != compositionEvent->mNativeIMEContext) {
      RefPtr<TextComposition> composition =
        IMEStateManager::GetTextCompositionFor(this);
      MOZ_ASSERT(!composition,
        "When there is composition caused by old native IME context, "
        "composition events caused by different native IME context are not "
        "allowed");
    }
#endif // #ifdef DEBUG
    mNativeIMEContext = compositionEvent->mNativeIMEContext;
  }

  // If the event is a composition event or a keyboard event, it should be
  // dispatched with TextEventDispatcher if we could do that with current
  // design.  However, we cannot do that without big changes and the behavior
  // is not so complicated for now.  Therefore, we should just notify it
  // of dispatching events and TextEventDispatcher should emulate the state
  // with events here.
  if (aEvent->mClass == eCompositionEventClass ||
      aEvent->mClass == eKeyboardEventClass) {
    TextEventDispatcher* dispatcher = GetTextEventDispatcher();
    // However, if the event is being dispatched by the text event dispatcher
    // or, there is native text event dispatcher listener, that means that
    // native text input event handler is in this process like on Android,
    // and the event is not synthesized for tests, the event is coming from
    // the TextEventDispatcher.  In these cases, we shouldn't notify
    // TextEventDispatcher of dispatching the event.
    if (!dispatcher->IsDispatchingEvent() &&
        !(mNativeTextEventDispatcherListener &&
          !aEvent->mFlags.mIsSynthesizedForTests)) {
      DebugOnly<nsresult> rv =
        dispatcher->BeginInputTransactionFor(aEvent, this);
      NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
        "The text event dispatcher should always succeed to start input "
        "transaction for the event");
    }
  }

  aStatus = nsEventStatus_eIgnore;

  if (GetCurrentWidgetListener()) {
    aStatus =
      GetCurrentWidgetListener()->HandleEvent(aEvent, mUseAttachedEvents);
  }

  return NS_OK;
}

nsEventStatus
PuppetWidget::DispatchInputEvent(WidgetInputEvent* aEvent)
{
  if (!AsyncPanZoomEnabled()) {
    nsEventStatus status = nsEventStatus_eIgnore;
    DispatchEvent(aEvent, status);
    return status;
  }

  if (!mTabChild) {
    return nsEventStatus_eIgnore;
  }

  switch (aEvent->mClass) {
    case eWheelEventClass:
      Unused <<
        mTabChild->SendDispatchWheelEvent(*aEvent->AsWheelEvent());
      break;
    case eMouseEventClass:
      Unused <<
        mTabChild->SendDispatchMouseEvent(*aEvent->AsMouseEvent());
      break;
    case eKeyboardEventClass:
      Unused <<
        mTabChild->SendDispatchKeyboardEvent(*aEvent->AsKeyboardEvent());
      break;
    default:
      MOZ_ASSERT_UNREACHABLE("unsupported event type");
  }

  return nsEventStatus_eIgnore;
}

nsresult
PuppetWidget::SynthesizeNativeKeyEvent(int32_t aNativeKeyboardLayout,
                                       int32_t aNativeKeyCode,
                                       uint32_t aModifierFlags,
                                       const nsAString& aCharacters,
                                       const nsAString& aUnmodifiedCharacters,
                                       nsIObserver* aObserver)
{
  AutoObserverNotifier notifier(aObserver, "keyevent");
  if (!mTabChild) {
    return NS_ERROR_FAILURE;
  }
  mTabChild->SendSynthesizeNativeKeyEvent(aNativeKeyboardLayout, aNativeKeyCode,
                                          aModifierFlags, nsString(aCharacters),
                                          nsString(aUnmodifiedCharacters),
                                          notifier.SaveObserver());
  return NS_OK;
}

nsresult
PuppetWidget::SynthesizeNativeMouseEvent(mozilla::LayoutDeviceIntPoint aPoint,
                                         uint32_t aNativeMessage,
                                         uint32_t aModifierFlags,
                                         nsIObserver* aObserver)
{
  AutoObserverNotifier notifier(aObserver, "mouseevent");
  if (!mTabChild) {
    return NS_ERROR_FAILURE;
  }
  mTabChild->SendSynthesizeNativeMouseEvent(aPoint, aNativeMessage,
                                            aModifierFlags,
                                            notifier.SaveObserver());
  return NS_OK;
}

nsresult
PuppetWidget::SynthesizeNativeMouseMove(mozilla::LayoutDeviceIntPoint aPoint,
                                        nsIObserver* aObserver)
{
  AutoObserverNotifier notifier(aObserver, "mousemove");
  if (!mTabChild) {
    return NS_ERROR_FAILURE;
  }
  mTabChild->SendSynthesizeNativeMouseMove(aPoint, notifier.SaveObserver());
  return NS_OK;
}

nsresult
PuppetWidget::SynthesizeNativeMouseScrollEvent(
                mozilla::LayoutDeviceIntPoint aPoint,
                uint32_t aNativeMessage,
                double aDeltaX,
                double aDeltaY,
                double aDeltaZ,
                uint32_t aModifierFlags,
                uint32_t aAdditionalFlags,
                nsIObserver* aObserver)
{
  AutoObserverNotifier notifier(aObserver, "mousescrollevent");
  if (!mTabChild) {
    return NS_ERROR_FAILURE;
  }
  mTabChild->SendSynthesizeNativeMouseScrollEvent(aPoint, aNativeMessage,
                                                  aDeltaX, aDeltaY, aDeltaZ,
                                                  aModifierFlags,
                                                  aAdditionalFlags,
                                                  notifier.SaveObserver());
  return NS_OK;
}

nsresult
PuppetWidget::SynthesizeNativeTouchPoint(uint32_t aPointerId,
                                         TouchPointerState aPointerState,
                                         LayoutDeviceIntPoint aPoint,
                                         double aPointerPressure,
                                         uint32_t aPointerOrientation,
                                         nsIObserver* aObserver)
{
  AutoObserverNotifier notifier(aObserver, "touchpoint");
  if (!mTabChild) {
    return NS_ERROR_FAILURE;
  }
  mTabChild->SendSynthesizeNativeTouchPoint(aPointerId, aPointerState,
                                            aPoint, aPointerPressure,
                                            aPointerOrientation,
                                            notifier.SaveObserver());
  return NS_OK;
}

nsresult
PuppetWidget::SynthesizeNativeTouchTap(LayoutDeviceIntPoint aPoint,
                                       bool aLongTap,
                                       nsIObserver* aObserver)
{
  AutoObserverNotifier notifier(aObserver, "touchtap");
  if (!mTabChild) {
    return NS_ERROR_FAILURE;
  }
  mTabChild->SendSynthesizeNativeTouchTap(aPoint, aLongTap,
                                          notifier.SaveObserver());
  return NS_OK;
}

nsresult
PuppetWidget::ClearNativeTouchSequence(nsIObserver* aObserver)
{
  AutoObserverNotifier notifier(aObserver, "cleartouch");
  if (!mTabChild) {
    return NS_ERROR_FAILURE;
  }
  mTabChild->SendClearNativeTouchSequence(notifier.SaveObserver());
  return NS_OK;
}

void
PuppetWidget::SetConfirmedTargetAPZC(
                uint64_t aInputBlockId,
                const nsTArray<ScrollableLayerGuid>& aTargets) const
{
  if (mTabChild) {
    mTabChild->SetTargetAPZC(aInputBlockId, aTargets);
  }
}

void
PuppetWidget::UpdateZoomConstraints(const uint32_t& aPresShellId,
                                    const FrameMetrics::ViewID& aViewId,
                                    const Maybe<ZoomConstraints>& aConstraints)
{
  if (mTabChild) {
    mTabChild->DoUpdateZoomConstraints(aPresShellId, aViewId, aConstraints);
  }
}

bool
PuppetWidget::AsyncPanZoomEnabled() const
{
  return mTabChild && mTabChild->AsyncPanZoomEnabled();
}

void
PuppetWidget::GetEditCommands(NativeKeyBindingsType aType,
                              const WidgetKeyboardEvent& aEvent,
                              nsTArray<CommandInt>& aCommands)
{
  // Validate the arguments.
  nsIWidget::GetEditCommands(aType, aEvent, aCommands);

  mTabChild->RequestEditCommands(aType, aEvent, aCommands);
}

LayerManager*
PuppetWidget::GetLayerManager(PLayerTransactionChild* aShadowManager,
                              LayersBackend aBackendHint,
                              LayerManagerPersistence aPersistence)
{
  if (!mLayerManager) {
    if (XRE_IsParentProcess()) {
      // On the parent process there is no CompositorBridgeChild which confuses
      // some layers code, so we use basic layers instead. Note that we create
      // a non-retaining layer manager since we don't care about performance.
      mLayerManager = new BasicLayerManager(BasicLayerManager::BLM_OFFSCREEN);
      return mLayerManager;
    }

    // If we know for sure that the parent side of this TabChild is not
    // connected to the compositor, we don't want to use a "remote" layer
    // manager like WebRender or Client. Instead we use a Basic one which
    // can do drawing in this process.
    MOZ_ASSERT(!mTabChild || mTabChild->IsLayersConnected() != Some(true));
    mLayerManager = new BasicLayerManager(this);
  }

  return mLayerManager;
}

bool
PuppetWidget::CreateRemoteLayerManager(const std::function<bool(LayerManager*)>& aInitializeFunc)
{
  RefPtr<LayerManager> lm;
  MOZ_ASSERT(mTabChild);
  if (mTabChild->GetCompositorOptions().UseWebRender()) {
    lm = new WebRenderLayerManager(this);
  } else {
    lm = new ClientLayerManager(this);
  }

  if (!aInitializeFunc(lm)) {
    return false;
  }

  // Force the old LM to self destruct, otherwise if the reference dangles we
  // could fail to revoke the most recent transaction. We only want to replace
  // it if we successfully create its successor because a partially initialized
  // layer manager is worse than a fully initialized but shutdown layer manager.
  DestroyLayerManager();
  mLayerManager = lm.forget();
  return true;
}

nsresult
PuppetWidget::RequestIMEToCommitComposition(bool aCancel)
{
  if (!mTabChild) {
    return NS_ERROR_FAILURE;
  }

  MOZ_ASSERT(!Destroyed());

  // There must not be composition which is caused by the PuppetWidget instance.
  if (NS_WARN_IF(!mNativeIMEContext.IsValid())) {
    return NS_OK;
  }

  // We've already requested to commit/cancel composition.
  if (NS_WARN_IF(mIgnoreCompositionEvents)) {
#ifdef DEBUG
    RefPtr<TextComposition> composition =
      IMEStateManager::GetTextCompositionFor(this);
    MOZ_ASSERT(!composition);
#endif // #ifdef DEBUG
    return NS_OK;
  }

  RefPtr<TextComposition> composition =
    IMEStateManager::GetTextCompositionFor(this);
  // This method shouldn't be called when there is no text composition instance.
  if (NS_WARN_IF(!composition)) {
    return NS_OK;
  }

  MOZ_DIAGNOSTIC_ASSERT(composition->IsRequestingCommitOrCancelComposition(),
    "Requesting commit or cancel composition should be requested via "
    "TextComposition instance");

  bool isCommitted = false;
  nsAutoString committedString;
  if (NS_WARN_IF(!mTabChild->SendRequestIMEToCommitComposition(
                               aCancel, &isCommitted, &committedString))) {
    return NS_ERROR_FAILURE;
  }

  // If the composition wasn't committed synchronously, we need to wait async
  // composition events for destroying the TextComposition instance.
  if (!isCommitted) {
    return NS_OK;
  }

  // Dispatch eCompositionCommit event.
  WidgetCompositionEvent compositionCommitEvent(true, eCompositionCommit, this);
  InitEvent(compositionCommitEvent, nullptr);
  compositionCommitEvent.mData = committedString;
  nsEventStatus status = nsEventStatus_eIgnore;
  DispatchEvent(&compositionCommitEvent, status);

#ifdef DEBUG
  RefPtr<TextComposition> currentComposition =
    IMEStateManager::GetTextCompositionFor(this);
  MOZ_ASSERT(!currentComposition);
#endif // #ifdef DEBUG

  // Ignore the following composition events until we receive new
  // eCompositionStart event.
  mIgnoreCompositionEvents = true;

  Unused <<
    mTabChild->SendOnEventNeedingAckHandled(eCompositionCommitRequestHandled);

  // NOTE: PuppetWidget might be destroyed already.
  return NS_OK;
}

nsresult
PuppetWidget::StartPluginIME(const mozilla::WidgetKeyboardEvent& aKeyboardEvent,
                             int32_t aPanelX, int32_t aPanelY,
                             nsString& aCommitted)
{
  if (!mTabChild ||
      !mTabChild->SendStartPluginIME(aKeyboardEvent, aPanelX,
                                     aPanelY, &aCommitted)) {
    return NS_ERROR_FAILURE;
  }
  return NS_OK;
}

void
PuppetWidget::SetPluginFocused(bool& aFocused)
{
  if (mTabChild) {
    mTabChild->SendSetPluginFocused(aFocused);
  }
}

void
PuppetWidget::DefaultProcOfPluginEvent(const WidgetPluginEvent& aEvent)
{
  if (!mTabChild) {
    return;
  }
  mTabChild->SendDefaultProcOfPluginEvent(aEvent);
}

void
PuppetWidget::SetInputContext(const InputContext& aContext,
                              const InputContextAction& aAction)
{
  mInputContext = aContext;
  // Any widget instances cannot cache IME open state because IME open state
  // can be changed by user but native IME may not notify us of changing the
  // open state on some platforms.
  mInputContext.mIMEState.mOpen = IMEState::OPEN_STATE_NOT_SUPPORTED;
  if (!mTabChild) {
    return;
  }
  mTabChild->SendSetInputContext(
    static_cast<int32_t>(aContext.mIMEState.mEnabled),
    static_cast<int32_t>(aContext.mIMEState.mOpen),
    aContext.mHTMLInputType,
    aContext.mHTMLInputInputmode,
    aContext.mActionHint,
    aContext.mInPrivateBrowsing,
    static_cast<int32_t>(aAction.mCause),
    static_cast<int32_t>(aAction.mFocusChange));
}

InputContext
PuppetWidget::GetInputContext()
{
  // XXX Currently, we don't support retrieving IME open state from child
  //     process.

  // When this widget caches input context and currently managed by
  // IMEStateManager, the cache is valid.  Only in this case, we can
  // avoid to use synchronous IPC.
  if (mInputContext.mIMEState.mEnabled != IMEState::UNKNOWN &&
      IMEStateManager::GetWidgetForActiveInputContext() == this) {
    return mInputContext;
  }

  NS_WARNING("PuppetWidget::GetInputContext() needs to retrieve it with IPC");

  // Don't cache InputContext here because this process isn't managing IME
  // state of the chrome widget.  So, we cannot modify mInputContext when
  // chrome widget is set to new context.
  InputContext context;
  if (mTabChild) {
    int32_t enabled, open;
    mTabChild->SendGetInputContext(&enabled, &open);
    context.mIMEState.mEnabled = static_cast<IMEState::Enabled>(enabled);
    context.mIMEState.mOpen = static_cast<IMEState::Open>(open);
  }
  return context;
}

NativeIMEContext
PuppetWidget::GetNativeIMEContext()
{
  return mNativeIMEContext;
}

nsresult
PuppetWidget::NotifyIMEOfFocusChange(const IMENotification& aIMENotification)
{
  if (!mTabChild) {
    return NS_ERROR_FAILURE;
  }

  bool gotFocus = aIMENotification.mMessage == NOTIFY_IME_OF_FOCUS;
  if (gotFocus) {
    if (mInputContext.mIMEState.mEnabled != IMEState::PLUGIN) {
      // When IME gets focus, we should initalize all information of the
      // content.
      if (NS_WARN_IF(!mContentCache.CacheAll(this, &aIMENotification))) {
        return NS_ERROR_FAILURE;
      }
    } else {
      // However, if a plugin has focus, only the editor rect information is
      // available.
      if (NS_WARN_IF(!mContentCache.CacheEditorRect(this, &aIMENotification))) {
        return NS_ERROR_FAILURE;
      }
    }
  } else {
    // When IME loses focus, we don't need to store anything.
    mContentCache.Clear();
  }

  mIMENotificationRequestsOfParent =
  IMENotificationRequests(IMENotificationRequests::NOTIFY_ALL);
  RefPtr<PuppetWidget> self = this;
  mTabChild->SendNotifyIMEFocus(mContentCache, aIMENotification)->Then(
    mTabChild->TabGroup()->EventTargetFor(TaskCategory::UI),
    __func__,
    [self] (IMENotificationRequests aRequests) {
      self->mIMENotificationRequestsOfParent = aRequests;
    },
    [self] (mozilla::ipc::ResponseRejectReason aReason) {
      NS_WARNING("SendNotifyIMEFocus got rejected.");
    });

  return NS_OK;
}

nsresult
PuppetWidget::NotifyIMEOfCompositionUpdate(
                const IMENotification& aIMENotification)
{
  if (NS_WARN_IF(!mTabChild)) {
    return NS_ERROR_FAILURE;
  }

  if (mInputContext.mIMEState.mEnabled != IMEState::PLUGIN &&
      NS_WARN_IF(!mContentCache.CacheSelection(this, &aIMENotification))) {
    return NS_ERROR_FAILURE;
  }
  mTabChild->SendNotifyIMECompositionUpdate(mContentCache, aIMENotification);
  return NS_OK;
}

nsresult
PuppetWidget::NotifyIMEOfTextChange(const IMENotification& aIMENotification)
{
  MOZ_ASSERT(aIMENotification.mMessage == NOTIFY_IME_OF_TEXT_CHANGE,
             "Passed wrong notification");
  if (!mTabChild) {
    return NS_ERROR_FAILURE;
  }

  // While a plugin has focus, text change notification shouldn't be available.
  if (NS_WARN_IF(mInputContext.mIMEState.mEnabled == IMEState::PLUGIN)) {
    return NS_ERROR_FAILURE;
  }

  // FYI: text change notification is the first notification after
  //      a user operation changes the content.  So, we need to modify
  //      the cache as far as possible here.

  if (NS_WARN_IF(!mContentCache.CacheText(this, &aIMENotification))) {
    return NS_ERROR_FAILURE;
  }

  // TabParent doesn't this this to cache.  we don't send the notification
  // if parent process doesn't request NOTIFY_TEXT_CHANGE.
  if (mIMENotificationRequestsOfParent.WantTextChange()) {
    mTabChild->SendNotifyIMETextChange(mContentCache, aIMENotification);
  } else {
    mTabChild->SendUpdateContentCache(mContentCache);
  }
  return NS_OK;
}

nsresult
PuppetWidget::NotifyIMEOfSelectionChange(
                const IMENotification& aIMENotification)
{
  MOZ_ASSERT(aIMENotification.mMessage == NOTIFY_IME_OF_SELECTION_CHANGE,
             "Passed wrong notification");
  if (!mTabChild) {
    return NS_ERROR_FAILURE;
  }

  // While a plugin has focus, selection change notification shouldn't be
  // available.
  if (NS_WARN_IF(mInputContext.mIMEState.mEnabled == IMEState::PLUGIN)) {
    return NS_ERROR_FAILURE;
  }

  // Note that selection change must be notified after text change if it occurs.
  // Therefore, we don't need to query text content again here.
  mContentCache.SetSelection(
    this,
    aIMENotification.mSelectionChangeData.mOffset,
    aIMENotification.mSelectionChangeData.Length(),
    aIMENotification.mSelectionChangeData.mReversed,
    aIMENotification.mSelectionChangeData.GetWritingMode());

  mTabChild->SendNotifyIMESelection(mContentCache, aIMENotification);

  return NS_OK;
}

nsresult
PuppetWidget::NotifyIMEOfMouseButtonEvent(
                const IMENotification& aIMENotification)
{
  if (!mTabChild) {
    return NS_ERROR_FAILURE;
  }

  // While a plugin has focus, mouse button event notification shouldn't be
  // available.
  if (NS_WARN_IF(mInputContext.mIMEState.mEnabled == IMEState::PLUGIN)) {
    return NS_ERROR_FAILURE;
  }


  bool consumedByIME = false;
  if (!mTabChild->SendNotifyIMEMouseButtonEvent(aIMENotification,
                                                &consumedByIME)) {
    return NS_ERROR_FAILURE;
  }

  return consumedByIME ? NS_SUCCESS_EVENT_CONSUMED : NS_OK;
}

nsresult
PuppetWidget::NotifyIMEOfPositionChange(const IMENotification& aIMENotification)
{
  if (NS_WARN_IF(!mTabChild)) {
    return NS_ERROR_FAILURE;
  }

  if (NS_WARN_IF(!mContentCache.CacheEditorRect(this, &aIMENotification))) {
    return NS_ERROR_FAILURE;
  }
  // While a plugin has focus, selection range isn't available.  So, we don't
  // need to cache it at that time.
  if (mInputContext.mIMEState.mEnabled != IMEState::PLUGIN &&
      NS_WARN_IF(!mContentCache.CacheSelection(this, &aIMENotification))) {
    return NS_ERROR_FAILURE;
  }
  if (mIMENotificationRequestsOfParent.WantPositionChanged()) {
    mTabChild->SendNotifyIMEPositionChange(mContentCache, aIMENotification);
  } else {
    mTabChild->SendUpdateContentCache(mContentCache);
  }
  return NS_OK;
}

void
PuppetWidget::SetCursor(nsCursor aCursor)
{
  // Don't cache on windows, Windowless flash breaks this via async cursor updates.
#if !defined(XP_WIN)
  if (mCursor == aCursor && !mCustomCursor && !mUpdateCursor) {
    return;
  }
#endif

  mCustomCursor = nullptr;

  if (mTabChild &&
      !mTabChild->SendSetCursor(aCursor, mUpdateCursor)) {
    return;
  }

  mCursor = aCursor;
  mUpdateCursor = false;
}

nsresult
PuppetWidget::SetCursor(imgIContainer* aCursor,
                        uint32_t aHotspotX, uint32_t aHotspotY)
{
  if (!aCursor || !mTabChild) {
    return NS_OK;
  }

#if !defined(XP_WIN)
  if (mCustomCursor == aCursor &&
      mCursorHotspotX == aHotspotX &&
      mCursorHotspotY == aHotspotY &&
      !mUpdateCursor) {
    return NS_OK;
  }
#endif

  RefPtr<mozilla::gfx::SourceSurface> surface =
    aCursor->GetFrame(imgIContainer::FRAME_CURRENT,
                      imgIContainer::FLAG_SYNC_DECODE);
  if (!surface) {
    return NS_ERROR_FAILURE;
  }

  RefPtr<mozilla::gfx::DataSourceSurface> dataSurface =
    surface->GetDataSurface();
  if (!dataSurface) {
    return NS_ERROR_FAILURE;
  }

  size_t length;
  int32_t stride;
  mozilla::UniquePtr<char[]> surfaceData =
    nsContentUtils::GetSurfaceData(WrapNotNull(dataSurface), &length, &stride);

  nsDependentCString cursorData(surfaceData.get(), length);
  mozilla::gfx::IntSize size = dataSurface->GetSize();
  if (!mTabChild->SendSetCustomCursor(cursorData, size.width, size.height, stride,
                                      static_cast<uint8_t>(dataSurface->GetFormat()),
                                      aHotspotX, aHotspotY, mUpdateCursor)) {
    return NS_ERROR_FAILURE;
  }

  mCursor = eCursorInvalid;
  mCustomCursor = aCursor;
  mCursorHotspotX = aHotspotX;
  mCursorHotspotY = aHotspotY;
  mUpdateCursor = false;

  return NS_OK;
}

void
PuppetWidget::ClearCachedCursor()
{
  nsBaseWidget::ClearCachedCursor();
  mCustomCursor = nullptr;
}

nsresult
PuppetWidget::Paint()
{
  MOZ_ASSERT(!mDirtyRegion.IsEmpty(), "paint event logic messed up");

  if (!GetCurrentWidgetListener())
    return NS_OK;

  LayoutDeviceIntRegion region = mDirtyRegion;

  // reset repaint tracking
  mDirtyRegion.SetEmpty();
  mPaintTask.Revoke();

  RefPtr<PuppetWidget> strongThis(this);

  GetCurrentWidgetListener()->WillPaintWindow(this);

  if (GetCurrentWidgetListener()) {
#ifdef DEBUG
    debug_DumpPaintEvent(stderr, this, region.ToUnknownRegion(),
                         "PuppetWidget", 0);
#endif

    if (mLayerManager->GetBackendType() == mozilla::layers::LayersBackend::LAYERS_CLIENT ||
        mLayerManager->GetBackendType() == mozilla::layers::LayersBackend::LAYERS_WR ||
        (mozilla::layers::LayersBackend::LAYERS_BASIC == mLayerManager->GetBackendType() &&
         mTabChild && mTabChild->IsLayersConnected().isSome())) {
      // Do nothing, the compositor will handle drawing
      if (mTabChild) {
        mTabChild->NotifyPainted();
      }
    } else if (mozilla::layers::LayersBackend::LAYERS_BASIC == mLayerManager->GetBackendType()) {
      RefPtr<gfxContext> ctx = gfxContext::CreateOrNull(mDrawTarget);
      if (!ctx) {
        gfxDevCrash(LogReason::InvalidContext) << "PuppetWidget context problem " << gfx::hexa(mDrawTarget);
        return NS_ERROR_FAILURE;
      }
      ctx->Rectangle(gfxRect(0,0,0,0));
      ctx->Clip();
      AutoLayerManagerSetup setupLayerManager(this, ctx,
                                              BufferMode::BUFFER_NONE);
      GetCurrentWidgetListener()->PaintWindow(this, region);
      if (mTabChild) {
        mTabChild->NotifyPainted();
      }
    }
  }

  if (GetCurrentWidgetListener()) {
    GetCurrentWidgetListener()->DidPaintWindow();
  }

  return NS_OK;
}

void
PuppetWidget::SetChild(PuppetWidget* aChild)
{
  MOZ_ASSERT(this != aChild, "can't parent a widget to itself");
  MOZ_ASSERT(!aChild->mChild,
             "fake widget 'hierarchy' only expected to have one level");

  mChild = aChild;
}

NS_IMETHODIMP
PuppetWidget::PaintTask::Run()
{
  if (mWidget) {
    mWidget->Paint();
  }
  return NS_OK;
}

void
PuppetWidget::PaintNowIfNeeded()
{
  if (IsVisible() && mPaintTask.IsPending()) {
    Paint();
  }
}

NS_IMPL_ISUPPORTS(PuppetWidget::MemoryPressureObserver, nsIObserver)

NS_IMETHODIMP
PuppetWidget::MemoryPressureObserver::Observe(nsISupports* aSubject,
                                              const char* aTopic,
                                              const char16_t* aData)
{
  if (!mWidget) {
    return NS_OK;
  }

  if (strcmp("memory-pressure", aTopic) == 0 &&
      !NS_LITERAL_STRING("lowering-priority").Equals(aData)) {
    if (!mWidget->mVisible && mWidget->mLayerManager &&
        XRE_IsContentProcess()) {
      mWidget->mLayerManager->ClearCachedResources();
    }
  }
  return NS_OK;
}

void
PuppetWidget::MemoryPressureObserver::Remove()
{
  nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
  if (obs) {
    obs->RemoveObserver(this, "memory-pressure");
  }
  mWidget = nullptr;
}

bool
PuppetWidget::NeedsPaint()
{
  // e10s popups are handled by the parent process, so never should be painted here
  if (XRE_IsContentProcess() &&
      gRemoteDesktopBehaviorEnabled &&
      mWindowType == eWindowType_popup) {
    NS_WARNING("Trying to paint an e10s popup in the child process!");
    return false;
  }

  return mVisible;
}

float
PuppetWidget::GetDPI()
{
  return mDPI;
}

double
PuppetWidget::GetDefaultScaleInternal()
{
  return mDefaultScale;
}

int32_t
PuppetWidget::RoundsWidgetCoordinatesTo()
{
  return mRounding;
}

void*
PuppetWidget::GetNativeData(uint32_t aDataType)
{
  switch (aDataType) {
  case NS_NATIVE_SHAREABLE_WINDOW: {
    // NOTE: We can not have a tab child in some situations, such as when we're
    // rendering to a fake widget for thumbnails.
    if (!mTabChild) {
      NS_WARNING("Need TabChild to get the nativeWindow from!");
    }
    mozilla::WindowsHandle nativeData = 0;
    if (mTabChild) {
      nativeData = mTabChild->WidgetNativeData();
    }
    return (void*)nativeData;
  }
  case NS_NATIVE_WINDOW:
  case NS_NATIVE_WIDGET:
  case NS_NATIVE_DISPLAY:
    // These types are ignored (see bug 1183828, bug 1240891).
    break;
  case NS_RAW_NATIVE_IME_CONTEXT:
    MOZ_CRASH("You need to call GetNativeIMEContext() instead");
  case NS_NATIVE_PLUGIN_PORT:
  case NS_NATIVE_GRAPHIC:
  case NS_NATIVE_SHELLWIDGET:
  default:
    NS_WARNING("nsWindow::GetNativeData called with bad value");
    break;
  }
  return nullptr;
}

#if defined(XP_WIN)
void
PuppetWidget::SetNativeData(uint32_t aDataType, uintptr_t aVal)
{
  switch (aDataType) {
  case NS_NATIVE_CHILD_OF_SHAREABLE_WINDOW:
    MOZ_ASSERT(mTabChild, "Need TabChild to send the message.");
    if (mTabChild) {
      mTabChild->SendSetNativeChildOfShareableWindow(aVal);
    }
    break;
  default:
    NS_WARNING("SetNativeData called with unsupported data type.");
  }
}
#endif

LayoutDeviceIntPoint
PuppetWidget::GetChromeOffset()
{
  if (!GetOwningTabChild()) {
    NS_WARNING("PuppetWidget without Tab does not have chrome information.");
    return LayoutDeviceIntPoint();
  }
  return GetOwningTabChild()->GetChromeOffset();
}

LayoutDeviceIntPoint
PuppetWidget::GetWindowPosition()
{
  if (!GetOwningTabChild()) {
    return LayoutDeviceIntPoint();
  }

  int32_t winX, winY, winW, winH;
  NS_ENSURE_SUCCESS(GetOwningTabChild()->GetDimensions(0, &winX, &winY, &winW, &winH), LayoutDeviceIntPoint());
  return LayoutDeviceIntPoint(winX, winY) + GetOwningTabChild()->GetClientOffset();
}

LayoutDeviceIntRect
PuppetWidget::GetScreenBounds()
{
  return LayoutDeviceIntRect(WidgetToScreenOffset(), mBounds.Size());
}

uint32_t PuppetWidget::GetMaxTouchPoints() const
{
  uint32_t maxTouchPoints = 0;
  if (mTabChild) {
    mTabChild->GetMaxTouchPoints(&maxTouchPoints);
  }
  return maxTouchPoints;
}

void
PuppetWidget::StartAsyncScrollbarDrag(const AsyncDragMetrics& aDragMetrics)
{
  mTabChild->StartScrollbarDrag(aDragMetrics);
}

PuppetScreen::PuppetScreen(void *nativeScreen)
{
}

PuppetScreen::~PuppetScreen()
{
}

static ScreenConfiguration
ScreenConfig()
{
  ScreenConfiguration config;
  hal::GetCurrentScreenConfiguration(&config);
  return config;
}

nsIntSize
PuppetWidget::GetScreenDimensions()
{
  nsIntRect r = ScreenConfig().rect();
  return nsIntSize(r.width, r.height);
}

NS_IMETHODIMP
PuppetScreen::GetRect(int32_t *outLeft,  int32_t *outTop,
                      int32_t *outWidth, int32_t *outHeight)
{
  nsIntRect r = ScreenConfig().rect();
  *outLeft = r.x;
  *outTop = r.y;
  *outWidth = r.width;
  *outHeight = r.height;
  return NS_OK;
}

NS_IMETHODIMP
PuppetScreen::GetAvailRect(int32_t *outLeft,  int32_t *outTop,
                           int32_t *outWidth, int32_t *outHeight)
{
  return GetRect(outLeft, outTop, outWidth, outHeight);
}

NS_IMETHODIMP
PuppetScreen::GetPixelDepth(int32_t *aPixelDepth)
{
  *aPixelDepth = ScreenConfig().pixelDepth();
  return NS_OK;
}

NS_IMETHODIMP
PuppetScreen::GetColorDepth(int32_t *aColorDepth)
{
  *aColorDepth = ScreenConfig().colorDepth();
  return NS_OK;
}

NS_IMPL_ISUPPORTS(PuppetScreenManager, nsIScreenManager)

PuppetScreenManager::PuppetScreenManager()
{
    mOneScreen = new PuppetScreen(nullptr);
}

PuppetScreenManager::~PuppetScreenManager()
{
}

NS_IMETHODIMP
PuppetScreenManager::GetPrimaryScreen(nsIScreen** outScreen)
{
  NS_IF_ADDREF(*outScreen = mOneScreen.get());
  return NS_OK;
}

NS_IMETHODIMP
PuppetScreenManager::ScreenForRect(int32_t inLeft,
                                   int32_t inTop,
                                   int32_t inWidth,
                                   int32_t inHeight,
                                   nsIScreen** outScreen)
{
  return GetPrimaryScreen(outScreen);
}

nsIWidgetListener*
PuppetWidget::GetCurrentWidgetListener()
{
  if (!mPreviouslyAttachedWidgetListener ||
      !mAttachedWidgetListener) {
    return mAttachedWidgetListener;
  }

  if (mAttachedWidgetListener->GetView()->IsPrimaryFramePaintSuppressed()) {
    return mPreviouslyAttachedWidgetListener;
  }

  return mAttachedWidgetListener;
}

void
PuppetWidget::SetCandidateWindowForPlugin(
                const CandidateWindowPosition& aPosition)
{
  if (!mTabChild) {
    return;
  }

  mTabChild->SendSetCandidateWindowForPlugin(aPosition);
}

void
PuppetWidget::ZoomToRect(const uint32_t& aPresShellId,
                         const FrameMetrics::ViewID& aViewId,
                         const CSSRect& aRect,
                         const uint32_t& aFlags)
{
  if (!mTabChild) {
    return;
  }

  mTabChild->ZoomToRect(aPresShellId, aViewId, aRect, aFlags);
}

void
PuppetWidget::LookUpDictionary(
                const nsAString& aText,
                const nsTArray<mozilla::FontRange>& aFontRangeArray,
                const bool aIsVertical,
                const LayoutDeviceIntPoint& aPoint)
{
  if (!mTabChild) {
    return;
  }

  mTabChild->SendLookUpDictionary(nsString(aText), aFontRangeArray, aIsVertical, aPoint);
}

bool
PuppetWidget::HasPendingInputEvent()
{
  if (!mTabChild) {
    return false;
  }

  bool ret = false;

  mTabChild->GetIPCChannel()->PeekMessages(
    [&ret](const IPC::Message& aMsg) -> bool {
      if (nsContentUtils::IsMessageInputEvent(aMsg)) {
        ret = true;
        return false; // Stop peeking.
      }
      return true;
    }
  );

  return ret;
}

void
PuppetWidget::HandledWindowedPluginKeyEvent(
                const NativeEventData& aKeyEventData,
                bool aIsConsumed)
{
  if (NS_WARN_IF(mKeyEventInPluginCallbacks.IsEmpty())) {
    return;
  }
  nsCOMPtr<nsIKeyEventInPluginCallback> callback =
    mKeyEventInPluginCallbacks[0];
  MOZ_ASSERT(callback);
  mKeyEventInPluginCallbacks.RemoveElementAt(0);
  callback->HandledWindowedPluginKeyEvent(aKeyEventData, aIsConsumed);
}

nsresult
PuppetWidget::OnWindowedPluginKeyEvent(const NativeEventData& aKeyEventData,
                                       nsIKeyEventInPluginCallback* aCallback)
{
  if (NS_WARN_IF(!mTabChild)) {
    return NS_ERROR_NOT_AVAILABLE;
  }
  if (NS_WARN_IF(!mTabChild->SendOnWindowedPluginKeyEvent(aKeyEventData))) {
    return NS_ERROR_FAILURE;
  }
  mKeyEventInPluginCallbacks.AppendElement(aCallback);
  return NS_SUCCESS_EVENT_HANDLED_ASYNCHRONOUSLY;
}

// TextEventDispatcherListener

NS_IMETHODIMP
PuppetWidget::NotifyIME(TextEventDispatcher* aTextEventDispatcher,
                        const IMENotification& aIMENotification)
{
  MOZ_ASSERT(aTextEventDispatcher == mTextEventDispatcher);

  // If there is different text event dispatcher listener for handling
  // text event dispatcher, that means that native keyboard events and
  // IME events are handled in this process.  Therefore, we don't need
  // to send any requests and notifications to the parent process.
  if (mNativeTextEventDispatcherListener) {
    return NS_ERROR_NOT_IMPLEMENTED;
  }

  switch (aIMENotification.mMessage) {
    case REQUEST_TO_COMMIT_COMPOSITION:
      return RequestIMEToCommitComposition(false);
    case REQUEST_TO_CANCEL_COMPOSITION:
      return RequestIMEToCommitComposition(true);
    case NOTIFY_IME_OF_FOCUS:
    case NOTIFY_IME_OF_BLUR:
      return NotifyIMEOfFocusChange(aIMENotification);
    case NOTIFY_IME_OF_SELECTION_CHANGE:
      return NotifyIMEOfSelectionChange(aIMENotification);
    case NOTIFY_IME_OF_TEXT_CHANGE:
      return NotifyIMEOfTextChange(aIMENotification);
    case NOTIFY_IME_OF_COMPOSITION_EVENT_HANDLED:
      return NotifyIMEOfCompositionUpdate(aIMENotification);
    case NOTIFY_IME_OF_MOUSE_BUTTON_EVENT:
      return NotifyIMEOfMouseButtonEvent(aIMENotification);
    case NOTIFY_IME_OF_POSITION_CHANGE:
      return NotifyIMEOfPositionChange(aIMENotification);
    default:
      return NS_ERROR_NOT_IMPLEMENTED;
  }

  return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP_(IMENotificationRequests)
PuppetWidget::GetIMENotificationRequests()
{
  if (mInputContext.mIMEState.mEnabled == IMEState::PLUGIN) {
    // If a plugin has focus, we cannot receive text nor selection change
    // in the plugin.  Therefore, PuppetWidget needs to receive only position
    // change event for updating the editor rect cache.
    return IMENotificationRequests(
             mIMENotificationRequestsOfParent.mWantUpdates |
             IMENotificationRequests::NOTIFY_POSITION_CHANGE);
  }
  return IMENotificationRequests(
           mIMENotificationRequestsOfParent.mWantUpdates |
           IMENotificationRequests::NOTIFY_TEXT_CHANGE |
           IMENotificationRequests::NOTIFY_POSITION_CHANGE);
}

NS_IMETHODIMP_(void)
PuppetWidget::OnRemovedFrom(TextEventDispatcher* aTextEventDispatcher)
{
  MOZ_ASSERT(aTextEventDispatcher == mTextEventDispatcher);
}

NS_IMETHODIMP_(void)
PuppetWidget::WillDispatchKeyboardEvent(
                TextEventDispatcher* aTextEventDispatcher,
                WidgetKeyboardEvent& aKeyboardEvent,
                uint32_t aIndexOfKeypress,
                void* aData)
{
  MOZ_ASSERT(aTextEventDispatcher == mTextEventDispatcher);
}

} // namespace widget
} // namespace mozilla