widget/nsBaseWidget.h

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5 #ifndef nsBaseWidget_h__
   6 #define nsBaseWidget_h__
   7
   8 #include "InputData.h"
   9 #include "mozilla/EventForwards.h"
  10 #include "mozilla/Mutex.h"
  11 #include "mozilla/RefPtr.h"
  12 #include "mozilla/UniquePtr.h"
  13 #include "mozilla/WidgetUtils.h"
  14 #include "mozilla/dom/MouseEventBinding.h"
  15 #include "mozilla/layers/APZCCallbackHelper.h"
  16 #include "mozilla/layers/CompositorOptions.h"
  17 #include "mozilla/layers/NativeLayer.h"
  18 #include "mozilla/widget/ThemeChangeKind.h"
  19 #include "mozilla/widget/WindowOcclusionState.h"
  20 #include "nsRect.h"
  21 #include "nsIWidget.h"
  22 #include "nsWidgetsCID.h"
  23 #include "nsIFile.h"
  24 #include "nsString.h"
  25 #include "nsCOMPtr.h"
  26 #include "nsIRollupListener.h"
  27 #include "nsIObserver.h"
  28 #include "nsIWidgetListener.h"
  29 #include "nsPIDOMWindow.h"
  30 #include "nsWeakReference.h"
  31
  32 #include <algorithm>
  33
  34 class nsIContent;
  35 class gfxContext;
  36
  37 namespace mozilla {
  38 class CompositorVsyncDispatcher;
  39 class LiveResizeListener;
  40 class FallbackRenderer;
  41 class SwipeTracker;
  42 struct SwipeEventQueue;
  43 class WidgetWheelEvent;
  44
  45 #ifdef ACCESSIBILITY
  46 namespace a11y {
  47 class LocalAccessible;
  48 }
  49 #endif
  50
  51 namespace gfx {
  52 class DrawTarget;
  53 class SourceSurface;
  54 }  // namespace gfx
  55
  56 namespace layers {
  57 class CompositorBridgeChild;
  58 class CompositorBridgeParent;
  59 class IAPZCTreeManager;
  60 class GeckoContentController;
  61 class APZEventState;
  62 struct APZEventResult;
  63 class CompositorSession;
  64 class ImageContainer;
  65 class WebRenderLayerManager;
  66 struct ScrollableLayerGuid;
  67 class RemoteCompositorSession;
  68 }  // namespace layers
  69
  70 namespace widget {
  71 class CompositorWidgetDelegate;
  72 class InProcessCompositorWidget;
  73 class WidgetRenderingContext;
  74 }  // namespace widget
  75
  76 class CompositorVsyncDispatcher;
  77 }  // namespace mozilla
  78
  79 namespace base {
  80 class Thread;
  81 }  // namespace base
  82
  83 // Windows specific constant indicating the maximum number of touch points the
  84 // inject api will allow. This also sets the maximum numerical value for touch
  85 // ids we can use when injecting touch points on Windows.
  86 #define TOUCH_INJECT_MAX_POINTS 256
  87
  88 class nsBaseWidget;
  89
  90 // Helper class used in shutting down gfx related code.
  91 class WidgetShutdownObserver final : public nsIObserver {
  92   ~WidgetShutdownObserver();
  93
  94  public:
  95   explicit WidgetShutdownObserver(nsBaseWidget* aWidget);
  96
  97   NS_DECL_ISUPPORTS
  98   NS_DECL_NSIOBSERVER
  99
 100   void Register();
 101   void Unregister();
 102
 103   nsBaseWidget* mWidget;
 104   bool mRegistered;
 105 };
 106
 107 // Helper class used for observing locales change.
 108 class LocalesChangedObserver final : public nsIObserver {
 109   ~LocalesChangedObserver();
 110
 111  public:
 112   explicit LocalesChangedObserver(nsBaseWidget* aWidget);
 113
 114   NS_DECL_ISUPPORTS
 115   NS_DECL_NSIOBSERVER
 116
 117   void Register();
 118   void Unregister();
 119
 120   nsBaseWidget* mWidget;
 121   bool mRegistered;
 122 };
 123
 124 /**
 125  * Common widget implementation used as base class for native
 126  * or crossplatform implementations of Widgets.
 127  * All cross-platform behavior that all widgets need to implement
 128  * should be placed in this class.
 129  * (Note: widget implementations are not required to use this
 130  * class, but it gives them a head start.)
 131  */
 132
 133 class nsBaseWidget : public nsIWidget, public nsSupportsWeakReference {
 134   template <class EventType, class InputType>
 135   friend class DispatchEventOnMainThread;
 136   friend class mozilla::widget::InProcessCompositorWidget;
 137   friend class mozilla::layers::RemoteCompositorSession;
 138
 139  protected:
 140   typedef base::Thread Thread;
 141   typedef mozilla::gfx::DrawTarget DrawTarget;
 142   typedef mozilla::gfx::SourceSurface SourceSurface;
 143   typedef mozilla::layers::BufferMode BufferMode;
 144   typedef mozilla::layers::CompositorBridgeChild CompositorBridgeChild;
 145   typedef mozilla::layers::CompositorBridgeParent CompositorBridgeParent;
 146   typedef mozilla::layers::IAPZCTreeManager IAPZCTreeManager;
 147   typedef mozilla::layers::GeckoContentController GeckoContentController;
 148   typedef mozilla::layers::ScrollableLayerGuid ScrollableLayerGuid;
 149   typedef mozilla::layers::APZEventState APZEventState;
 150   typedef mozilla::CSSIntRect CSSIntRect;
 151   typedef mozilla::CSSRect CSSRect;
 152   typedef mozilla::ScreenRotation ScreenRotation;
 153   typedef mozilla::widget::CompositorWidgetDelegate CompositorWidgetDelegate;
 154   typedef mozilla::layers::CompositorSession CompositorSession;
 155   typedef mozilla::layers::ImageContainer ImageContainer;
 156
 157   virtual ~nsBaseWidget();
 158
 159  public:
 160   nsBaseWidget();
 161
 162   explicit nsBaseWidget(nsBorderStyle aBorderStyle);
 163
 164   NS_DECL_THREADSAFE_ISUPPORTS
 165
 166   // nsIWidget interface
 167   void CaptureMouse(bool aCapture) override {}
 168   void CaptureRollupEvents(nsIRollupListener* aListener,
 169                            bool aDoCapture) override {}
 170   nsIWidgetListener* GetWidgetListener() const override;
 171   void SetWidgetListener(nsIWidgetListener* alistener) override;
 172   void Destroy() override;
 173   void SetParent(nsIWidget* aNewParent) override{};
 174   nsIWidget* GetParent() override;
 175   nsIWidget* GetTopLevelWidget() override;
 176   nsIWidget* GetSheetWindowParent(void) override;
 177   float GetDPI() override;
 178   void AddChild(nsIWidget* aChild) override;
 179   void RemoveChild(nsIWidget* aChild) override;
 180
 181   void SetZIndex(int32_t aZIndex) override;
 182   void PlaceBehind(nsTopLevelWidgetZPlacement aPlacement, nsIWidget* aWidget,
 183                    bool aActivate) override {}
 184
 185   void GetWorkspaceID(nsAString& workspaceID) override;
 186   void MoveToWorkspace(const nsAString& workspaceID) override;
 187   bool IsTiled() const override { return mIsTiled; }
 188
 189   bool IsFullyOccluded() const override { return mIsFullyOccluded; }
 190
 191   void SetCursor(const Cursor&) override;
 192   void ClearCachedCursor() final {
 193     mCursor = {};
 194     mUpdateCursor = true;
 195   }
 196   void SetTransparencyMode(nsTransparencyMode aMode) override;
 197   nsTransparencyMode GetTransparencyMode() override;
 198   void SetWindowShadowStyle(mozilla::StyleWindowShadow aStyle) override {}
 199   void SetShowsToolbarButton(bool aShow) override {}
 200   void SetSupportsNativeFullscreen(bool aSupportsNativeFullscreen) override {}
 201   void SetWindowAnimationType(WindowAnimationType aType) override {}
 202   void HideWindowChrome(bool aShouldHide) override {}
 203   bool PrepareForFullscreenTransition(nsISupports** aData) override {
 204     return false;
 205   }
 206   void PerformFullscreenTransition(FullscreenTransitionStage aStage,
 207                                    uint16_t aDuration, nsISupports* aData,
 208                                    nsIRunnable* aCallback) override;
 209   void CleanupFullscreenTransition() override {}
 210   already_AddRefed<nsIScreen> GetWidgetScreen() override;
 211   nsresult MakeFullScreen(bool aFullScreen) override;
 212   void InfallibleMakeFullScreen(bool aFullScreen);
 213
 214   WindowRenderer* GetWindowRenderer() override;
 215   bool HasWindowRenderer() const final { return !!mWindowRenderer; }
 216
 217   // A remote compositor session tied to this window has been lost and IPC
 218   // messages will no longer work. The widget must clean up any lingering
 219   // resources and possibly schedule another paint.
 220   //
 221   // A reference to the session object is held until this function has
 222   // returned.
 223   virtual void NotifyCompositorSessionLost(
 224       mozilla::layers::CompositorSession* aSession);
 225
 226   already_AddRefed<mozilla::CompositorVsyncDispatcher>
 227   GetCompositorVsyncDispatcher();
 228   virtual void CreateCompositorVsyncDispatcher();
 229   virtual void CreateCompositor();
 230   virtual void CreateCompositor(int aWidth, int aHeight);
 231   virtual void SetCompositorWidgetDelegate(CompositorWidgetDelegate*) {}
 232   void PrepareWindowEffects() override {}
 233   void UpdateThemeGeometries(
 234       const nsTArray<ThemeGeometry>& aThemeGeometries) override {}
 235   void SetModal(bool aModal) override {}
 236   uint32_t GetMaxTouchPoints() const override;
 237   void SetWindowClass(const nsAString& xulWinType) override {}
 238   // Return whether this widget interprets parameters to Move and Resize APIs
 239   // as "desktop pixels" rather than "device pixels", and therefore
 240   // applies its GetDefaultScale() value to them before using them as mBounds
 241   // etc (which are always stored in device pixels).
 242   // Note that APIs that -get- the widget's position/size/bounds, rather than
 243   // -setting- them (i.e. moving or resizing the widget) will always return
 244   // values in the widget's device pixels.
 245   bool BoundsUseDesktopPixels() const {
 246     return mWindowType <= eWindowType_popup;
 247   }
 248   // Default implementation, to be overridden by platforms where desktop coords
 249   // are virtualized and may not correspond to device pixels on the screen.
 250   mozilla::DesktopToLayoutDeviceScale GetDesktopToDeviceScale() override {
 251     return mozilla::DesktopToLayoutDeviceScale(1.0);
 252   }
 253   mozilla::DesktopToLayoutDeviceScale GetDesktopToDeviceScaleByScreen()
 254       override;
 255
 256   void ConstrainPosition(bool aAllowSlop, int32_t* aX, int32_t* aY) override {}
 257   void MoveClient(const DesktopPoint& aOffset) override;
 258   void ResizeClient(const DesktopSize& aSize, bool aRepaint) override;
 259   void ResizeClient(const DesktopRect& aRect, bool aRepaint) override;
 260   LayoutDeviceIntRect GetBounds() override;
 261   LayoutDeviceIntRect GetClientBounds() override;
 262   LayoutDeviceIntRect GetScreenBounds() override;
 263   [[nodiscard]] nsresult GetRestoredBounds(LayoutDeviceIntRect& aRect) override;
 264   nsresult SetNonClientMargins(LayoutDeviceIntMargin& aMargins) override;
 265   LayoutDeviceIntPoint GetClientOffset() override;
 266   void EnableDragDrop(bool aEnable) override{};
 267   nsresult AsyncEnableDragDrop(bool aEnable) override;
 268   void SetResizeMargin(mozilla::LayoutDeviceIntCoord aResizeMargin) override;
 269   [[nodiscard]] nsresult GetAttention(int32_t aCycleCount) override {
 270     return NS_OK;
 271   }
 272   bool HasPendingInputEvent() override;
 273   void SetIcon(const nsAString& aIconSpec) override {}
 274   void SetDrawsInTitlebar(bool aState) override {}
 275   bool ShowsResizeIndicator(LayoutDeviceIntRect* aResizerRect) override;
 276   void FreeNativeData(void* data, uint32_t aDataType) override {}
 277   [[nodiscard]] nsresult BeginResizeDrag(mozilla::WidgetGUIEvent* aEvent,
 278                                          int32_t aHorizontal,
 279                                          int32_t aVertical) override {
 280     return NS_ERROR_NOT_IMPLEMENTED;
 281   }
 282   nsresult ActivateNativeMenuItemAt(const nsAString& indexString) override {
 283     return NS_ERROR_NOT_IMPLEMENTED;
 284   }
 285   nsresult ForceUpdateNativeMenuAt(const nsAString& indexString) override {
 286     return NS_ERROR_NOT_IMPLEMENTED;
 287   }
 288   nsresult NotifyIME(const IMENotification& aIMENotification) final;
 289   [[nodiscard]] nsresult AttachNativeKeyEvent(
 290       mozilla::WidgetKeyboardEvent& aEvent) override {
 291     return NS_ERROR_NOT_IMPLEMENTED;
 292   }
 293   bool ComputeShouldAccelerate();
 294   virtual bool WidgetTypeSupportsAcceleration() { return true; }
 295   [[nodiscard]] nsresult OnDefaultButtonLoaded(
 296       const LayoutDeviceIntRect& aButtonRect) override {
 297     return NS_ERROR_NOT_IMPLEMENTED;
 298   }
 299   already_AddRefed<nsIWidget> CreateChild(
 300       const LayoutDeviceIntRect& aRect, nsWidgetInitData* aInitData = nullptr,
 301       bool aForceUseIWidgetParent = false) override;
 302   void AttachViewToTopLevel(bool aUseAttachedEvents) override;
 303   nsIWidgetListener* GetAttachedWidgetListener() const override;
 304   void SetAttachedWidgetListener(nsIWidgetListener* aListener) override;
 305   nsIWidgetListener* GetPreviouslyAttachedWidgetListener() override;
 306   void SetPreviouslyAttachedWidgetListener(nsIWidgetListener*) override;
 307   NativeIMEContext GetNativeIMEContext() override;
 308   TextEventDispatcher* GetTextEventDispatcher() final;
 309   TextEventDispatcherListener* GetNativeTextEventDispatcherListener() override;
 310   void ZoomToRect(const uint32_t& aPresShellId,
 311                   const ScrollableLayerGuid::ViewID& aViewId,
 312                   const CSSRect& aRect, const uint32_t& aFlags) override;
 313
 314   // Dispatch an event that must be first be routed through APZ.
 315   ContentAndAPZEventStatus DispatchInputEvent(
 316       mozilla::WidgetInputEvent* aEvent) override;
 317   void DispatchEventToAPZOnly(mozilla::WidgetInputEvent* aEvent) override;
 318
 319   bool DispatchWindowEvent(mozilla::WidgetGUIEvent& event) override;
 320
 321   void SetConfirmedTargetAPZC(
 322       uint64_t aInputBlockId,
 323       const nsTArray<ScrollableLayerGuid>& aTargets) const override;
 324
 325   void UpdateZoomConstraints(
 326       const uint32_t& aPresShellId, const ScrollableLayerGuid::ViewID& aViewId,
 327       const mozilla::Maybe<ZoomConstraints>& aConstraints) override;
 328
 329   bool AsyncPanZoomEnabled() const override;
 330
 331   void SwipeFinished() override;
 332   void ReportSwipeStarted(uint64_t aInputBlockId, bool aStartSwipe) override;
 333   void TrackScrollEventAsSwipe(const mozilla::PanGestureInput& aSwipeStartEvent,
 334                                uint32_t aAllowedDirections);
 335   struct SwipeInfo {
 336     bool wantsSwipe;
 337     uint32_t allowedDirections;
 338   };
 339   SwipeInfo SendMayStartSwipe(const mozilla::PanGestureInput& aSwipeStartEvent);
 340   enum class CanTriggerSwipe : bool {
 341     No = false,
 342     Yes = true,
 343   };
 344   // Returns a WidgetWheelEvent which needs to be handled by APZ regardless of
 345   // whether |aPanInput| event was used for SwipeTracker or not.
 346   mozilla::WidgetWheelEvent MayStartSwipeForAPZ(
 347       const mozilla::PanGestureInput& aPanInput,
 348       const mozilla::layers::APZEventResult& aApzResult,
 349       CanTriggerSwipe aCanTriggerSwipe);
 350
 351   // Returns true if |aPanInput| event was used for SwipeTracker, false
 352   // otherwise.
 353   bool MayStartSwipeForNonAPZ(const mozilla::PanGestureInput& aPanInput,
 354                               CanTriggerSwipe aCanTriggerSwipe);
 355
 356   void NotifyWindowDestroyed();
 357   void NotifySizeMoveDone();
 358   void NotifyWindowMoved(int32_t aX, int32_t aY);
 359
 360   void SetNativeData(uint32_t aDataType, uintptr_t aVal) override {}
 361
 362   // Should be called by derived implementations to notify on system color and
 363   // theme changes.
 364   void NotifyThemeChanged(mozilla::widget::ThemeChangeKind);
 365   void NotifyUIStateChanged(UIStateChangeType aShowFocusRings);
 366
 367 #ifdef ACCESSIBILITY
 368   // Get the accessible for the window.
 369   mozilla::a11y::LocalAccessible* GetRootAccessible();
 370 #endif
 371
 372   // Return true if this is a simple widget (that is typically not worth
 373   // accelerating)
 374   bool IsSmallPopup() const;
 375
 376   nsPopupLevel PopupLevel() { return mPopupLevel; }
 377
 378   LayoutDeviceIntSize ClientToWindowSize(
 379       const LayoutDeviceIntSize& aClientSize) override {
 380     return aClientSize;
 381   }
 382
 383   // return true if this is a popup widget with a native titlebar
 384   bool IsPopupWithTitleBar() const {
 385     return (mWindowType == eWindowType_popup &&
 386             mBorderStyle != eBorderStyle_default &&
 387             mBorderStyle & eBorderStyle_title);
 388   }
 389
 390   void ReparentNativeWidget(nsIWidget* aNewParent) override {}
 391
 392   const SizeConstraints GetSizeConstraints() override;
 393   void SetSizeConstraints(const SizeConstraints& aConstraints) override;
 394
 395   void StartAsyncScrollbarDrag(const AsyncDragMetrics& aDragMetrics) override;
 396
 397   bool StartAsyncAutoscroll(const ScreenPoint& aAnchorLocation,
 398                             const ScrollableLayerGuid& aGuid) override;
 399
 400   void StopAsyncAutoscroll(const ScrollableLayerGuid& aGuid) override;
 401
 402   mozilla::layers::LayersId GetRootLayerTreeId() override;
 403
 404   /**
 405    * Use this when GetLayerManager() returns a BasicLayerManager
 406    * (nsBaseWidget::GetLayerManager() does). This sets up the widget's
 407    * layer manager to temporarily render into aTarget.
 408    *
 409    * |aNaturalWidgetBounds| is the un-rotated bounds of |aWidget|.
 410    * |aRotation| is the "virtual rotation" to apply when rendering to
 411    * the target.  When |aRotation| is ROTATION_0,
 412    * |aNaturalWidgetBounds| is not used.
 413    */
 414   class AutoLayerManagerSetup {
 415    public:
 416     AutoLayerManagerSetup(nsBaseWidget* aWidget, gfxContext* aTarget,
 417                           BufferMode aDoubleBuffering);
 418     ~AutoLayerManagerSetup();
 419
 420    private:
 421     nsBaseWidget* mWidget;
 422     mozilla::FallbackRenderer* mRenderer = nullptr;
 423   };
 424   friend class AutoLayerManagerSetup;
 425
 426   virtual bool ShouldUseOffMainThreadCompositing();
 427
 428   static nsIRollupListener* GetActiveRollupListener();
 429
 430   void Shutdown();
 431
 432   void QuitIME();
 433
 434   // These functions should be called at the start and end of a "live" widget
 435   // resize (i.e. when the window contents are repainting during the resize,
 436   // such as when the user drags a window border). It will suppress the
 437   // displayport during the live resize to avoid unneccessary overpainting.
 438   void NotifyLiveResizeStarted();
 439   void NotifyLiveResizeStopped();
 440
 441 #if defined(MOZ_WIDGET_ANDROID)
 442   void RecvToolbarAnimatorMessageFromCompositor(int32_t) override{};
 443   void UpdateRootFrameMetrics(const ScreenPoint& aScrollOffset,
 444                               const CSSToScreenScale& aZoom) override{};
 445   void RecvScreenPixels(mozilla::ipc::Shmem&& aMem, const ScreenIntSize& aSize,
 446                         bool aNeedsYFlip) override{};
 447 #endif
 448
 449   virtual void LocalesChanged() {}
 450
 451   virtual void NotifyOcclusionState(mozilla::widget::OcclusionState aState) {}
 452
 453  protected:
 454   // These are methods for CompositorWidgetWrapper, and should only be
 455   // accessed from that class. Derived widgets can choose which methods to
 456   // implement, or none if supporting out-of-process compositing.
 457   virtual bool PreRender(mozilla::widget::WidgetRenderingContext* aContext) {
 458     return true;
 459   }
 460   virtual void PostRender(mozilla::widget::WidgetRenderingContext* aContext) {}
 461   virtual RefPtr<mozilla::layers::NativeLayerRoot> GetNativeLayerRoot() {
 462     return nullptr;
 463   }
 464   virtual already_AddRefed<DrawTarget> StartRemoteDrawing();
 465   virtual already_AddRefed<DrawTarget> StartRemoteDrawingInRegion(
 466       const LayoutDeviceIntRegion& aInvalidRegion, BufferMode* aBufferMode) {
 467     return StartRemoteDrawing();
 468   }
 469   virtual void EndRemoteDrawing() {}
 470   virtual void EndRemoteDrawingInRegion(
 471       DrawTarget* aDrawTarget, const LayoutDeviceIntRegion& aInvalidRegion) {
 472     EndRemoteDrawing();
 473   }
 474   virtual void CleanupRemoteDrawing() {}
 475   virtual void CleanupWindowEffects() {}
 476   virtual bool InitCompositor(mozilla::layers::Compositor* aCompositor) {
 477     return true;
 478   }
 479   virtual uint32_t GetGLFrameBufferFormat();
 480   virtual bool CompositorInitiallyPaused() { return false; }
 481
 482  protected:
 483   void ResolveIconName(const nsAString& aIconName, const nsAString& aIconSuffix,
 484                        nsIFile** aResult);
 485   virtual void OnDestroy();
 486   void BaseCreate(nsIWidget* aParent, nsWidgetInitData* aInitData);
 487
 488   virtual void ConfigureAPZCTreeManager();
 489   virtual void ConfigureAPZControllerThread();
 490   virtual already_AddRefed<GeckoContentController>
 491   CreateRootContentController();
 492
 493   // Dispatch an event that has already been routed through APZ.
 494   nsEventStatus ProcessUntransformedAPZEvent(
 495       mozilla::WidgetInputEvent* aEvent,
 496       const mozilla::layers::APZEventResult& aApzResult);
 497
 498   nsresult SynthesizeNativeKeyEvent(int32_t aNativeKeyboardLayout,
 499                                     int32_t aNativeKeyCode,
 500                                     uint32_t aModifierFlags,
 501                                     const nsAString& aCharacters,
 502                                     const nsAString& aUnmodifiedCharacters,
 503                                     nsIObserver* aObserver) override {
 504     mozilla::widget::AutoObserverNotifier notifier(aObserver, "keyevent");
 505     return NS_ERROR_UNEXPECTED;
 506   }
 507
 508   nsresult SynthesizeNativeMouseEvent(LayoutDeviceIntPoint aPoint,
 509                                       NativeMouseMessage aNativeMessage,
 510                                       mozilla::MouseButton aButton,
 511                                       nsIWidget::Modifiers aModifierFlags,
 512                                       nsIObserver* aObserver) override {
 513     mozilla::widget::AutoObserverNotifier notifier(aObserver, "mouseevent");
 514     return NS_ERROR_UNEXPECTED;
 515   }
 516
 517   nsresult SynthesizeNativeMouseMove(LayoutDeviceIntPoint aPoint,
 518                                      nsIObserver* aObserver) override {
 519     mozilla::widget::AutoObserverNotifier notifier(aObserver, "mouseevent");
 520     return NS_ERROR_UNEXPECTED;
 521   }
 522
 523   nsresult SynthesizeNativeMouseScrollEvent(
 524       LayoutDeviceIntPoint aPoint, uint32_t aNativeMessage, double aDeltaX,
 525       double aDeltaY, double aDeltaZ, uint32_t aModifierFlags,
 526       uint32_t aAdditionalFlags, nsIObserver* aObserver) override {
 527     mozilla::widget::AutoObserverNotifier notifier(aObserver,
 528                                                    "mousescrollevent");
 529     return NS_ERROR_UNEXPECTED;
 530   }
 531
 532   nsresult SynthesizeNativeTouchPoint(uint32_t aPointerId,
 533                                       TouchPointerState aPointerState,
 534                                       LayoutDeviceIntPoint aPoint,
 535                                       double aPointerPressure,
 536                                       uint32_t aPointerOrientation,
 537                                       nsIObserver* aObserver) override {
 538     mozilla::widget::AutoObserverNotifier notifier(aObserver, "touchpoint");
 539     return NS_ERROR_UNEXPECTED;
 540   }
 541
 542   nsresult SynthesizeNativeTouchPadPinch(TouchpadGesturePhase aEventPhase,
 543                                          float aScale,
 544                                          LayoutDeviceIntPoint aPoint,
 545                                          int32_t aModifierFlags) override {
 546     MOZ_RELEASE_ASSERT(
 547         false, "This method is not implemented on the current platform");
 548     return NS_ERROR_UNEXPECTED;
 549   }
 550
 551   nsresult SynthesizeNativePenInput(uint32_t aPointerId,
 552                                     TouchPointerState aPointerState,
 553                                     LayoutDeviceIntPoint aPoint,
 554                                     double aPressure, uint32_t aRotation,
 555                                     int32_t aTiltX, int32_t aTiltY,
 556                                     int32_t aButton,
 557                                     nsIObserver* aObserver) override {
 558     MOZ_RELEASE_ASSERT(
 559         false, "This method is not implemented on the current platform");
 560     return NS_ERROR_UNEXPECTED;
 561   }
 562
 563   nsresult SynthesizeNativeTouchpadDoubleTap(LayoutDeviceIntPoint aPoint,
 564                                              uint32_t aModifierFlags) override {
 565     MOZ_RELEASE_ASSERT(
 566         false, "This method is not implemented on the current platform");
 567     return NS_ERROR_UNEXPECTED;
 568   }
 569
 570   nsresult SynthesizeNativeTouchpadPan(TouchpadGesturePhase aEventPhase,
 571                                        LayoutDeviceIntPoint aPoint,
 572                                        double aDeltaX, double aDeltaY,
 573                                        int32_t aModifierFlags,
 574                                        nsIObserver* aObserver) override {
 575     MOZ_RELEASE_ASSERT(
 576         false, "This method is not implemented on the current platform");
 577     return NS_ERROR_UNEXPECTED;
 578   }
 579
 580   /**
 581    * GetPseudoIMEContext() returns pseudo IME context when TextEventDispatcher
 582    * has non-native input transaction.  Otherwise, returns nullptr.
 583    */
 584   void* GetPseudoIMEContext();
 585
 586  protected:
 587   virtual already_AddRefed<nsIWidget> AllocateChildPopupWidget() {
 588     return nsIWidget::CreateChildWindow();
 589   }
 590
 591   WindowRenderer* CreateFallbackRenderer();
 592
 593   nsPopupType PopupType() const { return mPopupType; }
 594
 595   bool HasRemoteContent() const { return mHasRemoteContent; }
 596
 597   /**
 598    * Apply the current size constraints to the given size.
 599    *
 600    * @param aWidth width to constrain
 601    * @param aHeight height to constrain
 602    */
 603   void ConstrainSize(int32_t* aWidth, int32_t* aHeight) override {
 604     SizeConstraints c = GetSizeConstraints();
 605     *aWidth = std::max(c.mMinSize.width, std::min(c.mMaxSize.width, *aWidth));
 606     *aHeight =
 607         std::max(c.mMinSize.height, std::min(c.mMaxSize.height, *aHeight));
 608   }
 609
 610   CompositorBridgeChild* GetRemoteRenderer() override;
 611
 612   void ClearCachedWebrenderResources() override;
 613
 614   bool SetNeedFastSnaphot() override;
 615
 616   /**
 617    * Notify the widget that this window is being used with OMTC.
 618    */
 619   virtual void WindowUsesOMTC() {}
 620   virtual void RegisterTouchWindow() {}
 621
 622   mozilla::dom::Document* GetDocument() const;
 623
 624   void EnsureTextEventDispatcher();
 625
 626   // Notify the compositor that a device reset has occurred.
 627   void OnRenderingDeviceReset();
 628
 629   bool UseAPZ();
 630
 631   bool AllowWebRenderForThisWindow();
 632
 633   /**
 634    * For widgets that support synthesizing native touch events, this function
 635    * can be used to manage the current state of synthetic pointers. Each widget
 636    * must maintain its own MultiTouchInput instance and pass it in as the state,
 637    * along with the desired parameters for the changes. This function returns
 638    * a new MultiTouchInput object that is ready to be dispatched.
 639    */
 640   mozilla::MultiTouchInput UpdateSynthesizedTouchState(
 641       mozilla::MultiTouchInput* aState, uint32_t aTime,
 642       mozilla::TimeStamp aTimeStamp, uint32_t aPointerId,
 643       TouchPointerState aPointerState, LayoutDeviceIntPoint aPoint,
 644       double aPointerPressure, uint32_t aPointerOrientation);
 645
 646   /**
 647    * Dispatch the given MultiTouchInput through APZ to Gecko (if APZ is enabled)
 648    * or directly to gecko (if APZ is not enabled). This function must only
 649    * be called from the main thread, and if APZ is enabled, that must also be
 650    * the APZ controller thread.
 651    */
 652   void DispatchTouchInput(
 653       mozilla::MultiTouchInput& aInput,
 654       uint16_t aInputSource =
 655           mozilla::dom::MouseEvent_Binding::MOZ_SOURCE_TOUCH);
 656
 657   /**
 658    * Dispatch the given PanGestureInput through APZ to Gecko (if APZ is enabled)
 659    * or directly to gecko (if APZ is not enabled). This function must only
 660    * be called from the main thread, and if APZ is enabled, that must also be
 661    * the APZ controller thread.
 662    */
 663   void DispatchPanGestureInput(mozilla::PanGestureInput& aInput);
 664   void DispatchPinchGestureInput(mozilla::PinchGestureInput& aInput);
 665
 666   static bool ConvertStatus(nsEventStatus aStatus) {
 667     return aStatus == nsEventStatus_eConsumeNoDefault;
 668   }
 669
 670  protected:
 671   // Returns whether compositing should use an external surface size.
 672   virtual bool UseExternalCompositingSurface() const { return false; }
 673
 674   /**
 675    * Starts the OMTC compositor destruction sequence.
 676    *
 677    * When this function returns, the compositor should not be
 678    * able to access the opengl context anymore.
 679    * It is safe to call it several times if platform implementations
 680    * require the compositor to be destroyed before ~nsBaseWidget is
 681    * reached (This is the case with gtk2 for instance).
 682    */
 683   virtual void DestroyCompositor();
 684   void DestroyLayerManager();
 685   void ReleaseContentController();
 686   void RevokeTransactionIdAllocator();
 687
 688   void FreeShutdownObserver();
 689   void FreeLocalesChangedObserver();
 690
 691   nsIWidgetListener* mWidgetListener;
 692   nsIWidgetListener* mAttachedWidgetListener;
 693   nsIWidgetListener* mPreviouslyAttachedWidgetListener;
 694   RefPtr<WindowRenderer> mWindowRenderer;
 695   RefPtr<CompositorSession> mCompositorSession;
 696   RefPtr<CompositorBridgeChild> mCompositorBridgeChild;
 697
 698   mozilla::UniquePtr<mozilla::Mutex> mCompositorVsyncDispatcherLock;
 699   RefPtr<mozilla::CompositorVsyncDispatcher> mCompositorVsyncDispatcher;
 700
 701   RefPtr<IAPZCTreeManager> mAPZC;
 702   RefPtr<GeckoContentController> mRootContentController;
 703   RefPtr<APZEventState> mAPZEventState;
 704   RefPtr<WidgetShutdownObserver> mShutdownObserver;
 705   RefPtr<LocalesChangedObserver> mLocalesChangedObserver;
 706   RefPtr<TextEventDispatcher> mTextEventDispatcher;
 707   RefPtr<mozilla::SwipeTracker> mSwipeTracker;
 708   mozilla::UniquePtr<mozilla::SwipeEventQueue> mSwipeEventQueue;
 709   Cursor mCursor;
 710   nsBorderStyle mBorderStyle;
 711   LayoutDeviceIntRect mBounds;
 712   LayoutDeviceIntRect* mOriginalBounds;
 713   bool mIsTiled;
 714   nsPopupLevel mPopupLevel;
 715   nsPopupType mPopupType;
 716   SizeConstraints mSizeConstraints;
 717   bool mHasRemoteContent;
 718
 719   bool mUpdateCursor;
 720   bool mUseAttachedEvents;
 721   bool mIMEHasFocus;
 722   bool mIMEHasQuit;
 723   bool mIsFullyOccluded;
 724   bool mNeedFastSnaphot;
 725   // This flag is only used when APZ is off. It indicates that the current pan
 726   // gesture was processed as a swipe. Sometimes the swipe animation can finish
 727   // before momentum events of the pan gesture have stopped firing, so this
 728   // flag tells us that we shouldn't allow the remaining events to cause
 729   // scrolling. It is reset to false once a new gesture starts (as indicated by
 730   // a PANGESTURE_(MAY)START event).
 731   bool mCurrentPanGestureBelongsToSwipe;
 732
 733   static nsIRollupListener* gRollupListener;
 734
 735   struct InitialZoomConstraints {
 736     InitialZoomConstraints(const uint32_t& aPresShellID,
 737                            const ScrollableLayerGuid::ViewID& aViewID,
 738                            const ZoomConstraints& aConstraints)
 739         : mPresShellID(aPresShellID),
 740           mViewID(aViewID),
 741           mConstraints(aConstraints) {}
 742
 743     uint32_t mPresShellID;
 744     ScrollableLayerGuid::ViewID mViewID;
 745     ZoomConstraints mConstraints;
 746   };
 747
 748   mozilla::Maybe<InitialZoomConstraints> mInitialZoomConstraints;
 749
 750   // This points to the resize listeners who have been notified that a live
 751   // resize is in progress. This should always be empty when a live-resize is
 752   // not in progress.
 753   nsTArray<RefPtr<mozilla::LiveResizeListener>> mLiveResizeListeners;
 754
 755 #ifdef DEBUG
 756  protected:
 757   static nsAutoString debug_GuiEventToString(
 758       mozilla::WidgetGUIEvent* aGuiEvent);
 759
 760   static void debug_DumpInvalidate(FILE* aFileOut, nsIWidget* aWidget,
 761                                    const LayoutDeviceIntRect* aRect,
 762                                    const char* aWidgetName, int32_t aWindowID);
 763
 764   static void debug_DumpEvent(FILE* aFileOut, nsIWidget* aWidget,
 765                               mozilla::WidgetGUIEvent* aGuiEvent,
 766                               const char* aWidgetName, int32_t aWindowID);
 767
 768   static void debug_DumpPaintEvent(FILE* aFileOut, nsIWidget* aWidget,
 769                                    const nsIntRegion& aPaintEvent,
 770                                    const char* aWidgetName, int32_t aWindowID);
 771
 772   static bool debug_GetCachedBoolPref(const char* aPrefName);
 773 #endif
 774
 775  private:
 776   already_AddRefed<mozilla::layers::WebRenderLayerManager>
 777   CreateCompositorSession(int aWidth, int aHeight,
 778                           mozilla::layers::CompositorOptions* aOptionsOut);
 779 };
 780
 781 #endif  // nsBaseWidget_h__