widget/PuppetWidget.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2  * vim: sw=2 ts=8 et :
   3  */
   4 /* This Source Code Form is subject to the terms of the Mozilla Public
   5  * License, v. 2.0. If a copy of the MPL was not distributed with this
   6  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   7
   8 #include "base/basictypes.h"
   9
  10 #include "gfxPlatform.h"
  11 #include "nsRefreshDriver.h"
  12 #include "mozilla/dom/BrowserChild.h"
  13 #include "mozilla/gfx/gfxVars.h"
  14 #include "mozilla/IMEStateManager.h"
  15 #include "mozilla/layers/APZChild.h"
  16 #include "mozilla/layers/WebRenderLayerManager.h"
  17 #include "mozilla/NativeKeyBindingsType.h"
  18 #include "mozilla/Preferences.h"
  19 #include "mozilla/PresShell.h"
  20 #include "mozilla/SchedulerGroup.h"
  21 #include "mozilla/StaticPrefs_browser.h"
  22 #include "mozilla/StaticPrefs_gfx.h"
  23 #include "mozilla/TextComposition.h"
  24 #include "mozilla/TextEventDispatcher.h"
  25 #include "mozilla/TextEvents.h"
  26 #include "mozilla/Unused.h"
  27 #include "PuppetWidget.h"
  28 #include "nsContentUtils.h"
  29 #include "nsIWidgetListener.h"
  30 #include "imgIContainer.h"
  31 #include "nsView.h"
  32 #include "nsXPLookAndFeel.h"
  33 #include "nsPrintfCString.h"
  34
  35 using namespace mozilla;
  36 using namespace mozilla::dom;
  37 using namespace mozilla::gfx;
  38 using namespace mozilla::layers;
  39 using namespace mozilla::widget;
  40
  41 static void InvalidateRegion(nsIWidget* aWidget,
  42                              const LayoutDeviceIntRegion& aRegion) {
  43   for (auto iter = aRegion.RectIter(); !iter.Done(); iter.Next()) {
  44     aWidget->Invalidate(iter.Get());
  45   }
  46 }
  47
  48 /*static*/
  49 already_AddRefed<nsIWidget> nsIWidget::CreatePuppetWidget(
  50     BrowserChild* aBrowserChild) {
  51   MOZ_ASSERT(!aBrowserChild || nsIWidget::UsePuppetWidgets(),
  52              "PuppetWidgets not allowed in this configuration");
  53
  54   nsCOMPtr<nsIWidget> widget = new PuppetWidget(aBrowserChild);
  55   return widget.forget();
  56 }
  57
  58 namespace mozilla {
  59 namespace widget {
  60
  61 static bool IsPopup(const widget::InitData* aInitData) {
  62   return aInitData && aInitData->mWindowType == WindowType::Popup;
  63 }
  64
  65 static bool MightNeedIMEFocus(const widget::InitData* aInitData) {
  66   // In the puppet-widget world, popup widgets are just dummies and
  67   // shouldn't try to mess with IME state.
  68 #ifdef MOZ_CROSS_PROCESS_IME
  69   return !IsPopup(aInitData);
  70 #else
  71   return false;
  72 #endif
  73 }
  74
  75 NS_IMPL_ISUPPORTS_INHERITED(PuppetWidget, nsBaseWidget,
  76                             TextEventDispatcherListener)
  77
  78 PuppetWidget::PuppetWidget(BrowserChild* aBrowserChild)
  79     : mBrowserChild(aBrowserChild),
  80       mMemoryPressureObserver(nullptr),
  81       mEnabled(false),
  82       mVisible(false),
  83       mSizeMode(nsSizeMode_Normal),
  84       mNeedIMEStateInit(false),
  85       mIgnoreCompositionEvents(false) {
  86   // Setting 'Unknown' means "not yet cached".
  87   mInputContext.mIMEState.mEnabled = IMEEnabled::Unknown;
  88 }
  89
  90 PuppetWidget::~PuppetWidget() { Destroy(); }
  91
  92 void PuppetWidget::InfallibleCreate(nsIWidget* aParent,
  93                                     nsNativeWidget aNativeParent,
  94                                     const LayoutDeviceIntRect& aRect,
  95                                     widget::InitData* aInitData) {
  96   MOZ_ASSERT(!aNativeParent, "got a non-Puppet native parent");
  97
  98   BaseCreate(nullptr, aInitData);
  99
 100   mBounds = aRect;
 101   mEnabled = true;
 102   mVisible = true;
 103
 104   mDrawTarget = gfxPlatform::GetPlatform()->CreateOffscreenContentDrawTarget(
 105       IntSize(1, 1), SurfaceFormat::B8G8R8A8);
 106
 107   mNeedIMEStateInit = MightNeedIMEFocus(aInitData);
 108
 109   PuppetWidget* parent = static_cast<PuppetWidget*>(aParent);
 110   if (parent) {
 111     parent->SetChild(this);
 112     mWindowRenderer = parent->GetWindowRenderer();
 113   } else {
 114     Resize(mBounds.X(), mBounds.Y(), mBounds.Width(), mBounds.Height(), false);
 115   }
 116   mMemoryPressureObserver = MemoryPressureObserver::Create(this);
 117 }
 118
 119 nsresult PuppetWidget::Create(nsIWidget* aParent, nsNativeWidget aNativeParent,
 120                               const LayoutDeviceIntRect& aRect,
 121                               widget::InitData* aInitData) {
 122   InfallibleCreate(aParent, aNativeParent, aRect, aInitData);
 123   return NS_OK;
 124 }
 125
 126 void PuppetWidget::InitIMEState() {
 127   MOZ_ASSERT(mBrowserChild);
 128   if (mNeedIMEStateInit) {
 129     mContentCache.Clear();
 130     mBrowserChild->SendUpdateContentCache(mContentCache);
 131     mIMENotificationRequestsOfParent = IMENotificationRequests();
 132     mNeedIMEStateInit = false;
 133   }
 134 }
 135
 136 already_AddRefed<nsIWidget> PuppetWidget::CreateChild(
 137     const LayoutDeviceIntRect& aRect, widget::InitData* aInitData,
 138     bool aForceUseIWidgetParent) {
 139   bool isPopup = IsPopup(aInitData);
 140   nsCOMPtr<nsIWidget> widget = nsIWidget::CreatePuppetWidget(mBrowserChild);
 141   return ((widget && NS_SUCCEEDED(widget->Create(isPopup ? nullptr : this,
 142                                                  nullptr, aRect, aInitData)))
 143               ? widget.forget()
 144               : nullptr);
 145 }
 146
 147 void PuppetWidget::Destroy() {
 148   if (mOnDestroyCalled) {
 149     return;
 150   }
 151   mOnDestroyCalled = true;
 152
 153   Base::OnDestroy();
 154   Base::Destroy();
 155   if (mMemoryPressureObserver) {
 156     mMemoryPressureObserver->Unregister();
 157     mMemoryPressureObserver = nullptr;
 158   }
 159   mChild = nullptr;
 160   if (mWindowRenderer) {
 161     mWindowRenderer->Destroy();
 162   }
 163   mWindowRenderer = nullptr;
 164   mBrowserChild = nullptr;
 165 }
 166
 167 void PuppetWidget::Show(bool aState) {
 168   NS_ASSERTION(mEnabled,
 169                "does it make sense to Show()/Hide() a disabled widget?");
 170
 171   bool wasVisible = mVisible;
 172   mVisible = aState;
 173
 174   if (mChild) {
 175     mChild->mVisible = aState;
 176   }
 177
 178   if (!wasVisible && mVisible) {
 179     // The previously attached widget listener is handy if
 180     // we're transitioning from page to page without dropping
 181     // layers (since we'll continue to show the old layers
 182     // associated with that old widget listener). If the
 183     // PuppetWidget was hidden, those layers are dropped,
 184     // so the previously attached widget listener is really
 185     // of no use anymore (and is actually actively harmful - see
 186     // bug 1323586).
 187     mPreviouslyAttachedWidgetListener = nullptr;
 188     Resize(mBounds.Width(), mBounds.Height(), false);
 189     Invalidate(mBounds);
 190   }
 191 }
 192
 193 void PuppetWidget::Resize(double aWidth, double aHeight, bool aRepaint) {
 194   LayoutDeviceIntRect oldBounds = mBounds;
 195   mBounds.SizeTo(
 196       LayoutDeviceIntSize(NSToIntRound(aWidth), NSToIntRound(aHeight)));
 197
 198   if (mChild) {
 199     mChild->Resize(aWidth, aHeight, aRepaint);
 200     return;
 201   }
 202
 203   // XXX: roc says that |aRepaint| dictates whether or not to
 204   // invalidate the expanded area
 205   if (oldBounds.Size() < mBounds.Size() && aRepaint) {
 206     LayoutDeviceIntRegion dirty(mBounds);
 207     dirty.Sub(dirty, oldBounds);
 208     InvalidateRegion(this, dirty);
 209   }
 210
 211   // call WindowResized() on both the current listener, and possibly
 212   // also the previous one if we're in a state where we're drawing that one
 213   // because the current one is paint suppressed
 214   if (!oldBounds.IsEqualEdges(mBounds) && mAttachedWidgetListener) {
 215     if (GetCurrentWidgetListener() &&
 216         GetCurrentWidgetListener() != mAttachedWidgetListener) {
 217       GetCurrentWidgetListener()->WindowResized(this, mBounds.Width(),
 218                                                 mBounds.Height());
 219     }
 220     mAttachedWidgetListener->WindowResized(this, mBounds.Width(),
 221                                            mBounds.Height());
 222   }
 223 }
 224
 225 void PuppetWidget::SetFocus(Raise aRaise, CallerType aCallerType) {
 226   if (aRaise == Raise::Yes && mBrowserChild) {
 227     mBrowserChild->SendRequestFocus(true, aCallerType);
 228   }
 229 }
 230
 231 void PuppetWidget::Invalidate(const LayoutDeviceIntRect& aRect) {
 232 #ifdef DEBUG
 233   debug_DumpInvalidate(stderr, this, &aRect, "PuppetWidget", 0);
 234 #endif
 235
 236   if (mChild) {
 237     mChild->Invalidate(aRect);
 238     return;
 239   }
 240
 241   if (mBrowserChild && !aRect.IsEmpty() && !mWidgetPaintTask.IsPending()) {
 242     mWidgetPaintTask = new WidgetPaintTask(this);
 243     nsCOMPtr<nsIRunnable> event(mWidgetPaintTask.get());
 244     SchedulerGroup::Dispatch(TaskCategory::Other, event.forget());
 245   }
 246 }
 247
 248 mozilla::LayoutDeviceToLayoutDeviceMatrix4x4
 249 PuppetWidget::WidgetToTopLevelWidgetTransform() {
 250   if (!GetOwningBrowserChild()) {
 251     NS_WARNING("PuppetWidget without Tab does not have transform information.");
 252     return mozilla::LayoutDeviceToLayoutDeviceMatrix4x4();
 253   }
 254   return GetOwningBrowserChild()->GetChildToParentConversionMatrix();
 255 }
 256
 257 void PuppetWidget::InitEvent(WidgetGUIEvent& aEvent,
 258                              LayoutDeviceIntPoint* aPoint) {
 259   if (nullptr == aPoint) {
 260     aEvent.mRefPoint = LayoutDeviceIntPoint(0, 0);
 261   } else {
 262     // use the point override if provided
 263     aEvent.mRefPoint = *aPoint;
 264   }
 265 }
 266
 267 nsresult PuppetWidget::DispatchEvent(WidgetGUIEvent* aEvent,
 268                                      nsEventStatus& aStatus) {
 269 #ifdef DEBUG
 270   debug_DumpEvent(stdout, aEvent->mWidget, aEvent, "PuppetWidget", 0);
 271 #endif
 272
 273   MOZ_ASSERT(!mChild || mChild->mWindowType == WindowType::Popup,
 274              "Unexpected event dispatch!");
 275
 276   MOZ_ASSERT(!aEvent->AsKeyboardEvent() ||
 277                  aEvent->mFlags.mIsSynthesizedForTests ||
 278                  aEvent->AsKeyboardEvent()->AreAllEditCommandsInitialized(),
 279              "Non-sysnthesized keyboard events should have edit commands for "
 280              "all types "
 281              "before dispatched");
 282
 283   if (aEvent->mClass == eCompositionEventClass) {
 284     // If we've already requested to commit/cancel the latest composition,
 285     // TextComposition for the old composition has been destroyed.  Then,
 286     // the DOM tree needs to listen to next eCompositionStart and its
 287     // following events.  So, until we meet new eCompositionStart, let's
 288     // discard all unnecessary composition events here.
 289     if (mIgnoreCompositionEvents) {
 290       if (aEvent->mMessage != eCompositionStart) {
 291         aStatus = nsEventStatus_eIgnore;
 292         return NS_OK;
 293       }
 294       // Now, we receive new eCompositionStart.  Let's restart to handle
 295       // composition in this process.
 296       mIgnoreCompositionEvents = false;
 297     }
 298     // Store the latest native IME context of parent process's widget or
 299     // TextEventDispatcher if it's in this process.
 300     WidgetCompositionEvent* compositionEvent = aEvent->AsCompositionEvent();
 301 #ifdef DEBUG
 302     if (mNativeIMEContext.IsValid() &&
 303         mNativeIMEContext != compositionEvent->mNativeIMEContext) {
 304       RefPtr<TextComposition> composition =
 305           IMEStateManager::GetTextCompositionFor(this);
 306       MOZ_ASSERT(
 307           !composition,
 308           "When there is composition caused by old native IME context, "
 309           "composition events caused by different native IME context are not "
 310           "allowed");
 311     }
 312 #endif  // #ifdef DEBUG
 313     mNativeIMEContext = compositionEvent->mNativeIMEContext;
 314     mContentCache.OnCompositionEvent(*compositionEvent);
 315   }
 316
 317   // If the event is a composition event or a keyboard event, it should be
 318   // dispatched with TextEventDispatcher if we could do that with current
 319   // design.  However, we cannot do that without big changes and the behavior
 320   // is not so complicated for now.  Therefore, we should just notify it
 321   // of dispatching events and TextEventDispatcher should emulate the state
 322   // with events here.
 323   if (aEvent->mClass == eCompositionEventClass ||
 324       aEvent->mClass == eKeyboardEventClass) {
 325     TextEventDispatcher* dispatcher = GetTextEventDispatcher();
 326     // However, if the event is being dispatched by the text event dispatcher
 327     // or, there is native text event dispatcher listener, that means that
 328     // native text input event handler is in this process like on Android,
 329     // and the event is not synthesized for tests, the event is coming from
 330     // the TextEventDispatcher.  In these cases, we shouldn't notify
 331     // TextEventDispatcher of dispatching the event.
 332     if (!dispatcher->IsDispatchingEvent() &&
 333         !(mNativeTextEventDispatcherListener &&
 334           !aEvent->mFlags.mIsSynthesizedForTests)) {
 335       DebugOnly<nsresult> rv =
 336           dispatcher->BeginInputTransactionFor(aEvent, this);
 337       NS_WARNING_ASSERTION(
 338           NS_SUCCEEDED(rv),
 339           "The text event dispatcher should always succeed to start input "
 340           "transaction for the event");
 341     }
 342   }
 343
 344   aStatus = nsEventStatus_eIgnore;
 345
 346   if (GetCurrentWidgetListener()) {
 347     aStatus =
 348         GetCurrentWidgetListener()->HandleEvent(aEvent, mUseAttachedEvents);
 349   }
 350
 351   return NS_OK;
 352 }
 353
 354 nsIWidget::ContentAndAPZEventStatus PuppetWidget::DispatchInputEvent(
 355     WidgetInputEvent* aEvent) {
 356   ContentAndAPZEventStatus status;
 357   if (!AsyncPanZoomEnabled()) {
 358     DispatchEvent(aEvent, status.mContentStatus);
 359     return status;
 360   }
 361
 362   if (!mBrowserChild) {
 363     return status;
 364   }
 365
 366   switch (aEvent->mClass) {
 367     case eWheelEventClass:
 368       Unused << mBrowserChild->SendDispatchWheelEvent(*aEvent->AsWheelEvent());
 369       break;
 370     case eMouseEventClass:
 371       Unused << mBrowserChild->SendDispatchMouseEvent(*aEvent->AsMouseEvent());
 372       break;
 373     case eKeyboardEventClass:
 374       Unused << mBrowserChild->SendDispatchKeyboardEvent(
 375           *aEvent->AsKeyboardEvent());
 376       break;
 377     case eTouchEventClass:
 378       Unused << mBrowserChild->SendDispatchTouchEvent(*aEvent->AsTouchEvent());
 379       break;
 380     default:
 381       MOZ_ASSERT_UNREACHABLE("unsupported event type");
 382   }
 383
 384   return status;
 385 }
 386
 387 nsresult PuppetWidget::SynthesizeNativeKeyEvent(
 388     int32_t aNativeKeyboardLayout, int32_t aNativeKeyCode,
 389     uint32_t aModifierFlags, const nsAString& aCharacters,
 390     const nsAString& aUnmodifiedCharacters, nsIObserver* aObserver) {
 391   AutoObserverNotifier notifier(aObserver, "keyevent");
 392   if (!mBrowserChild) {
 393     return NS_ERROR_FAILURE;
 394   }
 395   mBrowserChild->SendSynthesizeNativeKeyEvent(
 396       aNativeKeyboardLayout, aNativeKeyCode, aModifierFlags, aCharacters,
 397       aUnmodifiedCharacters, notifier.SaveObserver());
 398   return NS_OK;
 399 }
 400
 401 nsresult PuppetWidget::SynthesizeNativeMouseEvent(
 402     mozilla::LayoutDeviceIntPoint aPoint, NativeMouseMessage aNativeMessage,
 403     MouseButton aButton, nsIWidget::Modifiers aModifierFlags,
 404     nsIObserver* aObserver) {
 405   AutoObserverNotifier notifier(aObserver, "mouseevent");
 406   if (!mBrowserChild) {
 407     return NS_ERROR_FAILURE;
 408   }
 409   mBrowserChild->SendSynthesizeNativeMouseEvent(
 410       aPoint, static_cast<uint32_t>(aNativeMessage),
 411       static_cast<int16_t>(aButton), static_cast<uint32_t>(aModifierFlags),
 412       notifier.SaveObserver());
 413   return NS_OK;
 414 }
 415
 416 nsresult PuppetWidget::SynthesizeNativeMouseMove(
 417     mozilla::LayoutDeviceIntPoint aPoint, nsIObserver* aObserver) {
 418   AutoObserverNotifier notifier(aObserver, "mousemove");
 419   if (!mBrowserChild) {
 420     return NS_ERROR_FAILURE;
 421   }
 422   mBrowserChild->SendSynthesizeNativeMouseMove(aPoint, notifier.SaveObserver());
 423   return NS_OK;
 424 }
 425
 426 nsresult PuppetWidget::SynthesizeNativeMouseScrollEvent(
 427     mozilla::LayoutDeviceIntPoint aPoint, uint32_t aNativeMessage,
 428     double aDeltaX, double aDeltaY, double aDeltaZ, uint32_t aModifierFlags,
 429     uint32_t aAdditionalFlags, nsIObserver* aObserver) {
 430   AutoObserverNotifier notifier(aObserver, "mousescrollevent");
 431   if (!mBrowserChild) {
 432     return NS_ERROR_FAILURE;
 433   }
 434   mBrowserChild->SendSynthesizeNativeMouseScrollEvent(
 435       aPoint, aNativeMessage, aDeltaX, aDeltaY, aDeltaZ, aModifierFlags,
 436       aAdditionalFlags, notifier.SaveObserver());
 437   return NS_OK;
 438 }
 439
 440 nsresult PuppetWidget::SynthesizeNativeTouchPoint(
 441     uint32_t aPointerId, TouchPointerState aPointerState,
 442     LayoutDeviceIntPoint aPoint, double aPointerPressure,
 443     uint32_t aPointerOrientation, nsIObserver* aObserver) {
 444   AutoObserverNotifier notifier(aObserver, "touchpoint");
 445   if (!mBrowserChild) {
 446     return NS_ERROR_FAILURE;
 447   }
 448   mBrowserChild->SendSynthesizeNativeTouchPoint(
 449       aPointerId, aPointerState, aPoint, aPointerPressure, aPointerOrientation,
 450       notifier.SaveObserver());
 451   return NS_OK;
 452 }
 453
 454 nsresult PuppetWidget::SynthesizeNativeTouchPadPinch(
 455     TouchpadGesturePhase aEventPhase, float aScale, LayoutDeviceIntPoint aPoint,
 456     int32_t aModifierFlags) {
 457   if (!mBrowserChild) {
 458     return NS_ERROR_FAILURE;
 459   }
 460   mBrowserChild->SendSynthesizeNativeTouchPadPinch(aEventPhase, aScale, aPoint,
 461                                                    aModifierFlags);
 462   return NS_OK;
 463 }
 464
 465 nsresult PuppetWidget::SynthesizeNativeTouchTap(LayoutDeviceIntPoint aPoint,
 466                                                 bool aLongTap,
 467                                                 nsIObserver* aObserver) {
 468   AutoObserverNotifier notifier(aObserver, "touchtap");
 469   if (!mBrowserChild) {
 470     return NS_ERROR_FAILURE;
 471   }
 472   mBrowserChild->SendSynthesizeNativeTouchTap(aPoint, aLongTap,
 473                                               notifier.SaveObserver());
 474   return NS_OK;
 475 }
 476
 477 nsresult PuppetWidget::ClearNativeTouchSequence(nsIObserver* aObserver) {
 478   AutoObserverNotifier notifier(aObserver, "cleartouch");
 479   if (!mBrowserChild) {
 480     return NS_ERROR_FAILURE;
 481   }
 482   mBrowserChild->SendClearNativeTouchSequence(notifier.SaveObserver());
 483   return NS_OK;
 484 }
 485
 486 nsresult PuppetWidget::SynthesizeNativePenInput(
 487     uint32_t aPointerId, TouchPointerState aPointerState,
 488     LayoutDeviceIntPoint aPoint, double aPressure, uint32_t aRotation,
 489     int32_t aTiltX, int32_t aTiltY, int32_t aButton, nsIObserver* aObserver) {
 490   AutoObserverNotifier notifier(aObserver, "peninput");
 491   if (!mBrowserChild) {
 492     return NS_ERROR_FAILURE;
 493   }
 494   mBrowserChild->SendSynthesizeNativePenInput(
 495       aPointerId, aPointerState, aPoint, aPressure, aRotation, aTiltX, aTiltY,
 496       aButton, notifier.SaveObserver());
 497   return NS_OK;
 498 }
 499
 500 nsresult PuppetWidget::SynthesizeNativeTouchpadDoubleTap(
 501     LayoutDeviceIntPoint aPoint, uint32_t aModifierFlags) {
 502   if (!mBrowserChild) {
 503     return NS_ERROR_FAILURE;
 504   }
 505   mBrowserChild->SendSynthesizeNativeTouchpadDoubleTap(aPoint, aModifierFlags);
 506   return NS_OK;
 507 }
 508
 509 nsresult PuppetWidget::SynthesizeNativeTouchpadPan(
 510     TouchpadGesturePhase aEventPhase, LayoutDeviceIntPoint aPoint,
 511     double aDeltaX, double aDeltaY, int32_t aModifierFlags,
 512     nsIObserver* aObserver) {
 513   AutoObserverNotifier notifier(aObserver, "touchpadpanevent");
 514   if (!mBrowserChild) {
 515     return NS_ERROR_FAILURE;
 516   }
 517   mBrowserChild->SendSynthesizeNativeTouchpadPan(aEventPhase, aPoint, aDeltaX,
 518                                                  aDeltaY, aModifierFlags,
 519                                                  notifier.SaveObserver());
 520   return NS_OK;
 521 }
 522
 523 void PuppetWidget::LockNativePointer() {
 524   if (!mBrowserChild) {
 525     return;
 526   }
 527   mBrowserChild->SendLockNativePointer();
 528 }
 529
 530 void PuppetWidget::UnlockNativePointer() {
 531   if (!mBrowserChild) {
 532     return;
 533   }
 534   mBrowserChild->SendUnlockNativePointer();
 535 }
 536
 537 void PuppetWidget::SetConfirmedTargetAPZC(
 538     uint64_t aInputBlockId,
 539     const nsTArray<ScrollableLayerGuid>& aTargets) const {
 540   if (mBrowserChild) {
 541     mBrowserChild->SetTargetAPZC(aInputBlockId, aTargets);
 542   }
 543 }
 544
 545 void PuppetWidget::UpdateZoomConstraints(
 546     const uint32_t& aPresShellId, const ScrollableLayerGuid::ViewID& aViewId,
 547     const Maybe<ZoomConstraints>& aConstraints) {
 548   if (mBrowserChild) {
 549     mBrowserChild->DoUpdateZoomConstraints(aPresShellId, aViewId, aConstraints);
 550   }
 551 }
 552
 553 bool PuppetWidget::AsyncPanZoomEnabled() const {
 554   return mBrowserChild && mBrowserChild->AsyncPanZoomEnabled();
 555 }
 556
 557 bool PuppetWidget::GetEditCommands(NativeKeyBindingsType aType,
 558                                    const WidgetKeyboardEvent& aEvent,
 559                                    nsTArray<CommandInt>& aCommands) {
 560   MOZ_ASSERT(!aEvent.mFlags.mIsSynthesizedForTests);
 561   // Validate the arguments.
 562   if (NS_WARN_IF(!nsIWidget::GetEditCommands(aType, aEvent, aCommands))) {
 563     return false;
 564   }
 565   if (NS_WARN_IF(!mBrowserChild)) {
 566     return false;
 567   }
 568   mBrowserChild->RequestEditCommands(aType, aEvent, aCommands);
 569   return true;
 570 }
 571
 572 WindowRenderer* PuppetWidget::GetWindowRenderer() {
 573   if (!mWindowRenderer) {
 574     if (XRE_IsParentProcess()) {
 575       // On the parent process there is no CompositorBridgeChild which confuses
 576       // some layers code, so we use basic layers instead. Note that we create
 577       mWindowRenderer = new FallbackRenderer;
 578       return mWindowRenderer;
 579     }
 580
 581     // If we know for sure that the parent side of this BrowserChild is not
 582     // connected to the compositor, we don't want to use a "remote" layer
 583     // manager like WebRender or Client. Instead we use a Basic one which
 584     // can do drawing in this process.
 585     MOZ_ASSERT(!mBrowserChild ||
 586                mBrowserChild->IsLayersConnected() != Some(true));
 587     mWindowRenderer = CreateFallbackRenderer();
 588   }
 589
 590   return mWindowRenderer;
 591 }
 592
 593 bool PuppetWidget::CreateRemoteLayerManager(
 594     const std::function<bool(WebRenderLayerManager*)>& aInitializeFunc) {
 595   RefPtr<WebRenderLayerManager> lm = new WebRenderLayerManager(this);
 596   MOZ_ASSERT(mBrowserChild);
 597
 598   if (!aInitializeFunc(lm)) {
 599     return false;
 600   }
 601
 602   // Force the old LM to self destruct, otherwise if the reference dangles we
 603   // could fail to revoke the most recent transaction. We only want to replace
 604   // it if we successfully create its successor because a partially initialized
 605   // layer manager is worse than a fully initialized but shutdown layer manager.
 606   DestroyLayerManager();
 607   mWindowRenderer = std::move(lm);
 608   return true;
 609 }
 610
 611 nsresult PuppetWidget::RequestIMEToCommitComposition(bool aCancel) {
 612   if (!mBrowserChild) {
 613     return NS_ERROR_FAILURE;
 614   }
 615
 616   MOZ_ASSERT(!Destroyed());
 617
 618   // There must not be composition which is caused by the PuppetWidget instance.
 619   if (NS_WARN_IF(!mNativeIMEContext.IsValid())) {
 620     return NS_OK;
 621   }
 622
 623   // We've already requested to commit/cancel composition.
 624   if (NS_WARN_IF(mIgnoreCompositionEvents)) {
 625 #ifdef DEBUG
 626     RefPtr<TextComposition> composition =
 627         IMEStateManager::GetTextCompositionFor(this);
 628     MOZ_ASSERT(!composition);
 629 #endif  // #ifdef DEBUG
 630     return NS_OK;
 631   }
 632
 633   RefPtr<TextComposition> composition =
 634       IMEStateManager::GetTextCompositionFor(this);
 635   // This method shouldn't be called when there is no text composition instance.
 636   if (NS_WARN_IF(!composition)) {
 637     return NS_OK;
 638   }
 639
 640   MOZ_DIAGNOSTIC_ASSERT(
 641       composition->IsRequestingCommitOrCancelComposition(),
 642       "Requesting commit or cancel composition should be requested via "
 643       "TextComposition instance");
 644
 645   bool isCommitted = false;
 646   nsAutoString committedString;
 647   if (NS_WARN_IF(!mBrowserChild->SendRequestIMEToCommitComposition(
 648           aCancel, composition->Id(), &isCommitted, &committedString))) {
 649     return NS_ERROR_FAILURE;
 650   }
 651
 652   // If the composition wasn't committed synchronously, we need to wait async
 653   // composition events for destroying the TextComposition instance.
 654   if (!isCommitted) {
 655     return NS_OK;
 656   }
 657
 658   // Dispatch eCompositionCommit event.
 659   WidgetCompositionEvent compositionCommitEvent(true, eCompositionCommit, this);
 660   InitEvent(compositionCommitEvent, nullptr);
 661   compositionCommitEvent.mData = committedString;
 662   nsEventStatus status = nsEventStatus_eIgnore;
 663   DispatchEvent(&compositionCommitEvent, status);
 664
 665 #ifdef DEBUG
 666   RefPtr<TextComposition> currentComposition =
 667       IMEStateManager::GetTextCompositionFor(this);
 668   MOZ_ASSERT(!currentComposition);
 669 #endif  // #ifdef DEBUG
 670
 671   // Ignore the following composition events until we receive new
 672   // eCompositionStart event.
 673   mIgnoreCompositionEvents = true;
 674
 675   Unused << mBrowserChild->SendOnEventNeedingAckHandled(
 676       eCompositionCommitRequestHandled, composition->Id());
 677
 678   // NOTE: PuppetWidget might be destroyed already.
 679   return NS_OK;
 680 }
 681
 682 // When this widget caches input context and currently managed by
 683 // IMEStateManager, the cache is valid.
 684 bool PuppetWidget::HaveValidInputContextCache() const {
 685   return (mInputContext.mIMEState.mEnabled != IMEEnabled::Unknown &&
 686           IMEStateManager::GetWidgetForActiveInputContext() == this);
 687 }
 688
 689 nsRefreshDriver* PuppetWidget::GetTopLevelRefreshDriver() const {
 690   if (!mBrowserChild) {
 691     return nullptr;
 692   }
 693
 694   if (PresShell* presShell = mBrowserChild->GetTopLevelPresShell()) {
 695     return presShell->GetRefreshDriver();
 696   }
 697
 698   return nullptr;
 699 }
 700
 701 void PuppetWidget::SetInputContext(const InputContext& aContext,
 702                                    const InputContextAction& aAction) {
 703   mInputContext = aContext;
 704   // Any widget instances cannot cache IME open state because IME open state
 705   // can be changed by user but native IME may not notify us of changing the
 706   // open state on some platforms.
 707   mInputContext.mIMEState.mOpen = IMEState::OPEN_STATE_NOT_SUPPORTED;
 708   if (!mBrowserChild) {
 709     return;
 710   }
 711   mBrowserChild->SendSetInputContext(aContext, aAction);
 712 }
 713
 714 InputContext PuppetWidget::GetInputContext() {
 715   // XXX Currently, we don't support retrieving IME open state from child
 716   //     process.
 717
 718   // If the cache of input context is valid, we can avoid to use synchronous
 719   // IPC.
 720   if (HaveValidInputContextCache()) {
 721     return mInputContext;
 722   }
 723
 724   NS_WARNING("PuppetWidget::GetInputContext() needs to retrieve it with IPC");
 725
 726   // Don't cache InputContext here because this process isn't managing IME
 727   // state of the chrome widget.  So, we cannot modify mInputContext when
 728   // chrome widget is set to new context.
 729   InputContext context;
 730   if (mBrowserChild) {
 731     mBrowserChild->SendGetInputContext(&context.mIMEState);
 732   }
 733   return context;
 734 }
 735
 736 NativeIMEContext PuppetWidget::GetNativeIMEContext() {
 737   return mNativeIMEContext;
 738 }
 739
 740 nsresult PuppetWidget::NotifyIMEOfFocusChange(
 741     const IMENotification& aIMENotification) {
 742   MOZ_ASSERT(IMEStateManager::CanSendNotificationToWidget());
 743
 744   if (!mBrowserChild) {
 745     return NS_ERROR_FAILURE;
 746   }
 747
 748   bool gotFocus = aIMENotification.mMessage == NOTIFY_IME_OF_FOCUS;
 749   if (gotFocus) {
 750     // When IME gets focus, we should initialize all information of the
 751     // content, however, it may fail to get it because the editor may have
 752     // already been blurred.
 753     if (NS_WARN_IF(!mContentCache.CacheAll(this, &aIMENotification))) {
 754       return NS_ERROR_FAILURE;
 755     }
 756   } else {
 757     // When IME loses focus, we don't need to store anything.
 758     mContentCache.Clear();
 759   }
 760
 761   mIMENotificationRequestsOfParent =
 762       IMENotificationRequests(IMENotificationRequests::NOTIFY_ALL);
 763   RefPtr<PuppetWidget> self = this;
 764   mBrowserChild->SendNotifyIMEFocus(mContentCache, aIMENotification)
 765       ->Then(
 766           GetMainThreadSerialEventTarget(), __func__,
 767           [self](IMENotificationRequests&& aRequests) {
 768             self->mIMENotificationRequestsOfParent = aRequests;
 769             if (TextEventDispatcher* dispatcher =
 770                     self->GetTextEventDispatcher()) {
 771               dispatcher->OnWidgetChangeIMENotificationRequests(self);
 772             }
 773           },
 774           [self](mozilla::ipc::ResponseRejectReason&& aReason) {
 775             NS_WARNING("SendNotifyIMEFocus got rejected.");
 776           });
 777
 778   return NS_OK;
 779 }
 780
 781 nsresult PuppetWidget::NotifyIMEOfCompositionUpdate(
 782     const IMENotification& aIMENotification) {
 783   MOZ_ASSERT(IMEStateManager::CanSendNotificationToWidget());
 784
 785   if (NS_WARN_IF(!mBrowserChild)) {
 786     return NS_ERROR_FAILURE;
 787   }
 788
 789   if (NS_WARN_IF(
 790           !mContentCache.CacheCaretAndTextRects(this, &aIMENotification))) {
 791     return NS_ERROR_FAILURE;
 792   }
 793   mBrowserChild->SendNotifyIMECompositionUpdate(mContentCache,
 794                                                 aIMENotification);
 795   return NS_OK;
 796 }
 797
 798 nsresult PuppetWidget::NotifyIMEOfTextChange(
 799     const IMENotification& aIMENotification) {
 800   MOZ_ASSERT(IMEStateManager::CanSendNotificationToWidget());
 801   MOZ_ASSERT(aIMENotification.mMessage == NOTIFY_IME_OF_TEXT_CHANGE,
 802              "Passed wrong notification");
 803
 804   if (!mBrowserChild) {
 805     return NS_ERROR_FAILURE;
 806   }
 807
 808   // FYI: text change notification is the first notification after
 809   //      a user operation changes the content.  So, we need to modify
 810   //      the cache as far as possible here.
 811
 812   if (NS_WARN_IF(!mContentCache.CacheText(this, &aIMENotification))) {
 813     return NS_ERROR_FAILURE;
 814   }
 815
 816   // BrowserParent doesn't this this to cache.  we don't send the notification
 817   // if parent process doesn't request NOTIFY_TEXT_CHANGE.
 818   if (mIMENotificationRequestsOfParent.WantTextChange()) {
 819     mBrowserChild->SendNotifyIMETextChange(mContentCache, aIMENotification);
 820   } else {
 821     mBrowserChild->SendUpdateContentCache(mContentCache);
 822   }
 823   return NS_OK;
 824 }
 825
 826 nsresult PuppetWidget::NotifyIMEOfSelectionChange(
 827     const IMENotification& aIMENotification) {
 828   MOZ_ASSERT(IMEStateManager::CanSendNotificationToWidget());
 829   MOZ_ASSERT(aIMENotification.mMessage == NOTIFY_IME_OF_SELECTION_CHANGE,
 830              "Passed wrong notification");
 831   if (!mBrowserChild) {
 832     return NS_ERROR_FAILURE;
 833   }
 834
 835   // Note that selection change must be notified after text change if it occurs.
 836   // Therefore, we don't need to query text content again here.
 837   if (MOZ_UNLIKELY(!mContentCache.SetSelection(
 838           this, aIMENotification.mSelectionChangeData))) {
 839     // If there is no text cache yet, caching text will cache selection too.
 840     // Therefore, in the case, we don't need to notify IME of selection change
 841     // right now.
 842     return NS_OK;
 843   }
 844
 845   mBrowserChild->SendNotifyIMESelection(mContentCache, aIMENotification);
 846
 847   return NS_OK;
 848 }
 849
 850 nsresult PuppetWidget::NotifyIMEOfMouseButtonEvent(
 851     const IMENotification& aIMENotification) {
 852   MOZ_ASSERT(IMEStateManager::CanSendNotificationToWidget());
 853   if (!mBrowserChild) {
 854     return NS_ERROR_FAILURE;
 855   }
 856
 857   bool consumedByIME = false;
 858   if (!mBrowserChild->SendNotifyIMEMouseButtonEvent(aIMENotification,
 859                                                     &consumedByIME)) {
 860     return NS_ERROR_FAILURE;
 861   }
 862
 863   return consumedByIME ? NS_SUCCESS_EVENT_CONSUMED : NS_OK;
 864 }
 865
 866 nsresult PuppetWidget::NotifyIMEOfPositionChange(
 867     const IMENotification& aIMENotification) {
 868   MOZ_ASSERT(IMEStateManager::CanSendNotificationToWidget());
 869   if (NS_WARN_IF(!mBrowserChild)) {
 870     return NS_ERROR_FAILURE;
 871   }
 872
 873   if (NS_WARN_IF(!mContentCache.CacheEditorRect(this, &aIMENotification))) {
 874     return NS_ERROR_FAILURE;
 875   }
 876   if (NS_WARN_IF(
 877           !mContentCache.CacheCaretAndTextRects(this, &aIMENotification))) {
 878     return NS_ERROR_FAILURE;
 879   }
 880   if (mIMENotificationRequestsOfParent.WantPositionChanged()) {
 881     mBrowserChild->SendNotifyIMEPositionChange(mContentCache, aIMENotification);
 882   } else {
 883     mBrowserChild->SendUpdateContentCache(mContentCache);
 884   }
 885   return NS_OK;
 886 }
 887
 888 struct CursorSurface {
 889   UniquePtr<char[]> mData;
 890   IntSize mSize;
 891 };
 892
 893 void PuppetWidget::SetCursor(const Cursor& aCursor) {
 894   if (!mBrowserChild) {
 895     return;
 896   }
 897
 898   const bool force = mUpdateCursor;
 899   if (!force && mCursor == aCursor) {
 900     return;
 901   }
 902
 903   bool hasCustomCursor = false;
 904   Maybe<mozilla::ipc::BigBuffer> customCursorData;
 905   size_t length = 0;
 906   IntSize customCursorSize;
 907   int32_t stride = 0;
 908   auto format = SurfaceFormat::B8G8R8A8;
 909   ImageResolution resolution = aCursor.mResolution;
 910   if (aCursor.IsCustom()) {
 911     int32_t width = 0, height = 0;
 912     aCursor.mContainer->GetWidth(&width);
 913     aCursor.mContainer->GetHeight(&height);
 914     const int32_t flags =
 915         imgIContainer::FLAG_SYNC_DECODE | imgIContainer::FLAG_ASYNC_NOTIFY;
 916     RefPtr<SourceSurface> surface;
 917     if (width && height &&
 918         aCursor.mContainer->GetType() == imgIContainer::TYPE_VECTOR) {
 919       // For vector images, scale to device pixels.
 920       resolution.ScaleBy(GetDefaultScale().scale);
 921       resolution.ApplyInverseTo(width, height);
 922       surface = aCursor.mContainer->GetFrameAtSize(
 923           {width, height}, imgIContainer::FRAME_CURRENT, flags);
 924     } else {
 925       // NOTE(emilio): We get the frame at the full size, ignoring resolution,
 926       // because we're going to rasterize it, and we'd effectively lose the
 927       // extra pixels if we rasterized to CustomCursorSize.
 928       surface =
 929           aCursor.mContainer->GetFrame(imgIContainer::FRAME_CURRENT, flags);
 930     }
 931     if (surface) {
 932       if (RefPtr<DataSourceSurface> dataSurface = surface->GetDataSurface()) {
 933         hasCustomCursor = true;
 934         customCursorData =
 935             nsContentUtils::GetSurfaceData(*dataSurface, &length, &stride);
 936         customCursorSize = dataSurface->GetSize();
 937         format = dataSurface->GetFormat();
 938       }
 939     }
 940   }
 941
 942   if (!mBrowserChild->SendSetCursor(
 943           aCursor.mDefaultCursor, hasCustomCursor, std::move(customCursorData),
 944           customCursorSize.width, customCursorSize.height, resolution.mX,
 945           resolution.mY, stride, format, aCursor.mHotspotX, aCursor.mHotspotY,
 946           force)) {
 947     return;
 948   }
 949   mCursor = aCursor;
 950   mUpdateCursor = false;
 951 }
 952
 953 void PuppetWidget::SetChild(PuppetWidget* aChild) {
 954   MOZ_ASSERT(this != aChild, "can't parent a widget to itself");
 955   MOZ_ASSERT(!aChild->mChild,
 956              "fake widget 'hierarchy' only expected to have one level");
 957
 958   mChild = aChild;
 959 }
 960
 961 NS_IMETHODIMP
 962 PuppetWidget::WidgetPaintTask::Run() {
 963   if (mWidget) {
 964     mWidget->Paint();
 965   }
 966   return NS_OK;
 967 }
 968
 969 void PuppetWidget::Paint() {
 970   if (!GetCurrentWidgetListener()) return;
 971
 972   mWidgetPaintTask.Revoke();
 973
 974   RefPtr<PuppetWidget> strongThis(this);
 975
 976   GetCurrentWidgetListener()->WillPaintWindow(this);
 977
 978   if (GetCurrentWidgetListener()) {
 979     GetCurrentWidgetListener()->DidPaintWindow();
 980   }
 981 }
 982
 983 void PuppetWidget::PaintNowIfNeeded() {
 984   if (IsVisible() && mWidgetPaintTask.IsPending()) {
 985     Paint();
 986   }
 987 }
 988
 989 void PuppetWidget::OnMemoryPressure(layers::MemoryPressureReason aWhy) {
 990   if (aWhy != MemoryPressureReason::LOW_MEMORY_ONGOING && !mVisible &&
 991       mWindowRenderer && mWindowRenderer->AsWebRender() &&
 992       XRE_IsContentProcess()) {
 993     mWindowRenderer->AsWebRender()->ClearCachedResources();
 994   }
 995 }
 996
 997 bool PuppetWidget::NeedsPaint() {
 998   // e10s popups are handled by the parent process, so never should be painted
 999   // here
1000   return mVisible;
1001 }
1002
1003 LayoutDeviceIntPoint PuppetWidget::GetChromeOffset() {
1004   if (!GetOwningBrowserChild()) {
1005     NS_WARNING("PuppetWidget without Tab does not have chrome information.");
1006     return LayoutDeviceIntPoint();
1007   }
1008   return GetOwningBrowserChild()->GetChromeOffset();
1009 }
1010
1011 LayoutDeviceIntPoint PuppetWidget::WidgetToScreenOffset() {
1012   return GetWindowPosition() + WidgetToTopLevelWidgetOffset();
1013 }
1014
1015 LayoutDeviceIntPoint PuppetWidget::GetWindowPosition() {
1016   if (!GetOwningBrowserChild()) {
1017     return LayoutDeviceIntPoint();
1018   }
1019
1020   int32_t winX, winY, winW, winH;
1021   NS_ENSURE_SUCCESS(GetOwningBrowserChild()->GetDimensions(
1022                         DimensionKind::Outer, &winX, &winY, &winW, &winH),
1023                     LayoutDeviceIntPoint());
1024   return LayoutDeviceIntPoint(winX, winY) +
1025          GetOwningBrowserChild()->GetClientOffset();
1026 }
1027
1028 LayoutDeviceIntRect PuppetWidget::GetScreenBounds() {
1029   return LayoutDeviceIntRect(WidgetToScreenOffset(), mBounds.Size());
1030 }
1031
1032 uint32_t PuppetWidget::GetMaxTouchPoints() const {
1033   return mBrowserChild ? mBrowserChild->MaxTouchPoints() : 0;
1034 }
1035
1036 void PuppetWidget::StartAsyncScrollbarDrag(
1037     const AsyncDragMetrics& aDragMetrics) {
1038   mBrowserChild->StartScrollbarDrag(aDragMetrics);
1039 }
1040
1041 ScreenIntMargin PuppetWidget::GetSafeAreaInsets() const {
1042   return mSafeAreaInsets;
1043 }
1044
1045 void PuppetWidget::UpdateSafeAreaInsets(
1046     const ScreenIntMargin& aSafeAreaInsets) {
1047   mSafeAreaInsets = aSafeAreaInsets;
1048 }
1049
1050 nsIWidgetListener* PuppetWidget::GetCurrentWidgetListener() {
1051   if (!mPreviouslyAttachedWidgetListener || !mAttachedWidgetListener) {
1052     return mAttachedWidgetListener;
1053   }
1054
1055   if (mAttachedWidgetListener->GetView()->IsPrimaryFramePaintSuppressed()) {
1056     return mPreviouslyAttachedWidgetListener;
1057   }
1058
1059   return mAttachedWidgetListener;
1060 }
1061
1062 void PuppetWidget::ZoomToRect(const uint32_t& aPresShellId,
1063                               const ScrollableLayerGuid::ViewID& aViewId,
1064                               const CSSRect& aRect, const uint32_t& aFlags) {
1065   if (!mBrowserChild) {
1066     return;
1067   }
1068
1069   mBrowserChild->ZoomToRect(aPresShellId, aViewId, aRect, aFlags);
1070 }
1071
1072 void PuppetWidget::LookUpDictionary(
1073     const nsAString& aText, const nsTArray<mozilla::FontRange>& aFontRangeArray,
1074     const bool aIsVertical, const LayoutDeviceIntPoint& aPoint) {
1075   if (!mBrowserChild) {
1076     return;
1077   }
1078
1079   mBrowserChild->SendLookUpDictionary(aText, aFontRangeArray, aIsVertical,
1080                                       aPoint);
1081 }
1082
1083 bool PuppetWidget::HasPendingInputEvent() {
1084   if (!mBrowserChild) {
1085     return false;
1086   }
1087
1088   bool ret = false;
1089
1090   mBrowserChild->GetIPCChannel()->PeekMessages(
1091       [&ret](const IPC::Message& aMsg) -> bool {
1092         if (nsContentUtils::IsMessageInputEvent(aMsg)) {
1093           ret = true;
1094           return false;  // Stop peeking.
1095         }
1096         return true;
1097       });
1098
1099   return ret;
1100 }
1101
1102 // TextEventDispatcherListener
1103
1104 NS_IMETHODIMP
1105 PuppetWidget::NotifyIME(TextEventDispatcher* aTextEventDispatcher,
1106                         const IMENotification& aIMENotification) {
1107   MOZ_ASSERT(aTextEventDispatcher == mTextEventDispatcher);
1108
1109   // If there is different text event dispatcher listener for handling
1110   // text event dispatcher, that means that native keyboard events and
1111   // IME events are handled in this process.  Therefore, we don't need
1112   // to send any requests and notifications to the parent process.
1113   if (mNativeTextEventDispatcherListener) {
1114     return NS_ERROR_NOT_IMPLEMENTED;
1115   }
1116
1117   switch (aIMENotification.mMessage) {
1118     case REQUEST_TO_COMMIT_COMPOSITION:
1119       return RequestIMEToCommitComposition(false);
1120     case REQUEST_TO_CANCEL_COMPOSITION:
1121       return RequestIMEToCommitComposition(true);
1122     case NOTIFY_IME_OF_FOCUS:
1123     case NOTIFY_IME_OF_BLUR:
1124       return NotifyIMEOfFocusChange(aIMENotification);
1125     case NOTIFY_IME_OF_SELECTION_CHANGE:
1126       return NotifyIMEOfSelectionChange(aIMENotification);
1127     case NOTIFY_IME_OF_TEXT_CHANGE:
1128       return NotifyIMEOfTextChange(aIMENotification);
1129     case NOTIFY_IME_OF_COMPOSITION_EVENT_HANDLED:
1130       return NotifyIMEOfCompositionUpdate(aIMENotification);
1131     case NOTIFY_IME_OF_MOUSE_BUTTON_EVENT:
1132       return NotifyIMEOfMouseButtonEvent(aIMENotification);
1133     case NOTIFY_IME_OF_POSITION_CHANGE:
1134       return NotifyIMEOfPositionChange(aIMENotification);
1135     default:
1136       return NS_ERROR_NOT_IMPLEMENTED;
1137   }
1138 }
1139
1140 NS_IMETHODIMP_(IMENotificationRequests)
1141 PuppetWidget::GetIMENotificationRequests() {
1142   return IMENotificationRequests(
1143       mIMENotificationRequestsOfParent.mWantUpdates |
1144       IMENotificationRequests::NOTIFY_TEXT_CHANGE |
1145       IMENotificationRequests::NOTIFY_POSITION_CHANGE);
1146 }
1147
1148 NS_IMETHODIMP_(void)
1149 PuppetWidget::OnRemovedFrom(TextEventDispatcher* aTextEventDispatcher) {
1150   MOZ_ASSERT(aTextEventDispatcher == mTextEventDispatcher);
1151 }
1152
1153 NS_IMETHODIMP_(void)
1154 PuppetWidget::WillDispatchKeyboardEvent(
1155     TextEventDispatcher* aTextEventDispatcher,
1156     WidgetKeyboardEvent& aKeyboardEvent, uint32_t aIndexOfKeypress,
1157     void* aData) {
1158   MOZ_ASSERT(aTextEventDispatcher == mTextEventDispatcher);
1159 }
1160
1161 nsresult PuppetWidget::SetSystemFont(const nsCString& aFontName) {
1162   if (!mBrowserChild) {
1163     return NS_ERROR_FAILURE;
1164   }
1165
1166   mBrowserChild->SendSetSystemFont(aFontName);
1167   return NS_OK;
1168 }
1169
1170 nsresult PuppetWidget::GetSystemFont(nsCString& aFontName) {
1171   if (!mBrowserChild) {
1172     return NS_ERROR_FAILURE;
1173   }
1174   mBrowserChild->SendGetSystemFont(&aFontName);
1175   return NS_OK;
1176 }
1177
1178 }  // namespace widget
1179 }  // namespace mozilla