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(BorderStyle aBorderStyle);
 163
 164   NS_DECL_THREADSAFE_ISUPPORTS
 165
 166   // nsIWidget interface
 167   void CaptureRollupEvents(bool aDoCapture) override {}
 168   nsIWidgetListener* GetWidgetListener() const override;
 169   void SetWidgetListener(nsIWidgetListener* alistener) override;
 170   void Destroy() override;
 171   void SetParent(nsIWidget* aNewParent) override{};
 172   nsIWidget* GetParent() override;
 173   nsIWidget* GetTopLevelWidget() override;
 174   nsIWidget* GetSheetWindowParent(void) override;
 175   float GetDPI() override;
 176   void AddChild(nsIWidget* aChild) override;
 177   void RemoveChild(nsIWidget* aChild) override;
 178
 179   void SetZIndex(int32_t aZIndex) override;
 180   void PlaceBehind(nsTopLevelWidgetZPlacement aPlacement, nsIWidget* aWidget,
 181                    bool aActivate) override {}
 182
 183   void GetWorkspaceID(nsAString& workspaceID) override;
 184   void MoveToWorkspace(const nsAString& workspaceID) override;
 185   bool IsTiled() const override { return mIsTiled; }
 186
 187   bool IsFullyOccluded() const override { return mIsFullyOccluded; }
 188
 189   void SetCursor(const Cursor&) override;
 190   void SetCustomCursorAllowed(bool) override;
 191   void ClearCachedCursor() final {
 192     mCursor = {};
 193     mUpdateCursor = true;
 194   }
 195   void SetTransparencyMode(TransparencyMode aMode) override;
 196   TransparencyMode GetTransparencyMode() override;
 197   void SetWindowShadowStyle(mozilla::WindowShadow) override {}
 198   void SetShowsToolbarButton(bool aShow) override {}
 199   void SetSupportsNativeFullscreen(bool aSupportsNativeFullscreen) override {}
 200   void SetWindowAnimationType(WindowAnimationType aType) override {}
 201   void HideWindowChrome(bool aShouldHide) override {}
 202   bool PrepareForFullscreenTransition(nsISupports** aData) override {
 203     return false;
 204   }
 205   void PerformFullscreenTransition(FullscreenTransitionStage aStage,
 206                                    uint16_t aDuration, nsISupports* aData,
 207                                    nsIRunnable* aCallback) override;
 208   void CleanupFullscreenTransition() override {}
 209   already_AddRefed<Screen> GetWidgetScreen() override;
 210   nsresult MakeFullScreen(bool aFullScreen) override;
 211   void InfallibleMakeFullScreen(bool aFullScreen);
 212
 213   WindowRenderer* GetWindowRenderer() override;
 214   bool HasWindowRenderer() const final { return !!mWindowRenderer; }
 215
 216   // A remote compositor session tied to this window has been lost and IPC
 217   // messages will no longer work. The widget must clean up any lingering
 218   // resources and possibly schedule another paint.
 219   //
 220   // A reference to the session object is held until this function has
 221   // returned. Callers should hold a reference to the widget, since this
 222   // function could deallocate the widget if it is unparented.
 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, const nsAString& xulWinClass,
 238                       const nsAString& xulWinName) override {}
 239   // Return whether this widget interprets parameters to Move and Resize APIs
 240   // as "desktop pixels" rather than "device pixels", and therefore
 241   // applies its GetDefaultScale() value to them before using them as mBounds
 242   // etc (which are always stored in device pixels).
 243   // Note that APIs that -get- the widget's position/size/bounds, rather than
 244   // -setting- them (i.e. moving or resizing the widget) will always return
 245   // values in the widget's device pixels.
 246   bool BoundsUseDesktopPixels() const {
 247     return mWindowType <= WindowType::Popup;
 248   }
 249   // Default implementation, to be overridden by platforms where desktop coords
 250   // are virtualized and may not correspond to device pixels on the screen.
 251   mozilla::DesktopToLayoutDeviceScale GetDesktopToDeviceScale() override {
 252     return mozilla::DesktopToLayoutDeviceScale(1.0);
 253   }
 254   mozilla::DesktopToLayoutDeviceScale GetDesktopToDeviceScaleByScreen()
 255       override;
 256
 257   void ConstrainPosition(DesktopIntPoint&) override {}
 258   void MoveClient(const DesktopPoint& aOffset) override;
 259   void ResizeClient(const DesktopSize& aSize, bool aRepaint) override;
 260   void ResizeClient(const DesktopRect& aRect, bool aRepaint) override;
 261   LayoutDeviceIntRect GetBounds() override;
 262   LayoutDeviceIntRect GetClientBounds() override;
 263   LayoutDeviceIntRect GetScreenBounds() override;
 264   [[nodiscard]] nsresult GetRestoredBounds(LayoutDeviceIntRect& aRect) override;
 265   nsresult SetNonClientMargins(const LayoutDeviceIntMargin&) override;
 266   LayoutDeviceIntPoint GetClientOffset() override;
 267   void EnableDragDrop(bool aEnable) override{};
 268   nsresult AsyncEnableDragDrop(bool aEnable) override;
 269   void SetResizeMargin(mozilla::LayoutDeviceIntCoord aResizeMargin) override;
 270   [[nodiscard]] nsresult GetAttention(int32_t aCycleCount) override {
 271     return NS_OK;
 272   }
 273   bool HasPendingInputEvent() override;
 274   void SetIcon(const nsAString& aIconSpec) override {}
 275   bool ShowsResizeIndicator(LayoutDeviceIntRect* aResizerRect) override;
 276   void FreeNativeData(void* data, uint32_t aDataType) override {}
 277   nsresult ActivateNativeMenuItemAt(const nsAString& indexString) override {
 278     return NS_ERROR_NOT_IMPLEMENTED;
 279   }
 280   nsresult ForceUpdateNativeMenuAt(const nsAString& indexString) override {
 281     return NS_ERROR_NOT_IMPLEMENTED;
 282   }
 283   nsresult NotifyIME(const IMENotification& aIMENotification) final;
 284   [[nodiscard]] nsresult AttachNativeKeyEvent(
 285       mozilla::WidgetKeyboardEvent& aEvent) override {
 286     return NS_ERROR_NOT_IMPLEMENTED;
 287   }
 288   bool ComputeShouldAccelerate();
 289   virtual bool WidgetTypeSupportsAcceleration() { return true; }
 290   [[nodiscard]] nsresult OnDefaultButtonLoaded(
 291       const LayoutDeviceIntRect& aButtonRect) override {
 292     return NS_ERROR_NOT_IMPLEMENTED;
 293   }
 294   already_AddRefed<nsIWidget> CreateChild(
 295       const LayoutDeviceIntRect& aRect, InitData* aInitData = nullptr,
 296       bool aForceUseIWidgetParent = false) override;
 297   void AttachViewToTopLevel(bool aUseAttachedEvents) override;
 298   nsIWidgetListener* GetAttachedWidgetListener() const override;
 299   void SetAttachedWidgetListener(nsIWidgetListener* aListener) override;
 300   nsIWidgetListener* GetPreviouslyAttachedWidgetListener() override;
 301   void SetPreviouslyAttachedWidgetListener(nsIWidgetListener*) override;
 302   NativeIMEContext GetNativeIMEContext() override;
 303   TextEventDispatcher* GetTextEventDispatcher() final;
 304   TextEventDispatcherListener* GetNativeTextEventDispatcherListener() override;
 305   void ZoomToRect(const uint32_t& aPresShellId,
 306                   const ScrollableLayerGuid::ViewID& aViewId,
 307                   const CSSRect& aRect, const uint32_t& aFlags) override;
 308
 309   // Dispatch an event that must be first be routed through APZ.
 310   ContentAndAPZEventStatus DispatchInputEvent(
 311       mozilla::WidgetInputEvent* aEvent) override;
 312   void DispatchEventToAPZOnly(mozilla::WidgetInputEvent* aEvent) override;
 313
 314   bool DispatchWindowEvent(mozilla::WidgetGUIEvent& event) override;
 315
 316   void SetConfirmedTargetAPZC(
 317       uint64_t aInputBlockId,
 318       const nsTArray<ScrollableLayerGuid>& aTargets) const override;
 319
 320   void UpdateZoomConstraints(
 321       const uint32_t& aPresShellId, const ScrollableLayerGuid::ViewID& aViewId,
 322       const mozilla::Maybe<ZoomConstraints>& aConstraints) override;
 323
 324   bool AsyncPanZoomEnabled() const override;
 325
 326   void SwipeFinished() override;
 327   void ReportSwipeStarted(uint64_t aInputBlockId, bool aStartSwipe) override;
 328   void TrackScrollEventAsSwipe(const mozilla::PanGestureInput& aSwipeStartEvent,
 329                                uint32_t aAllowedDirections,
 330                                uint64_t aInputBlockId);
 331   struct SwipeInfo {
 332     bool wantsSwipe;
 333     uint32_t allowedDirections;
 334   };
 335   SwipeInfo SendMayStartSwipe(const mozilla::PanGestureInput& aSwipeStartEvent);
 336   // Returns a WidgetWheelEvent which needs to be handled by APZ regardless of
 337   // whether |aPanInput| event was used for SwipeTracker or not.
 338   mozilla::WidgetWheelEvent MayStartSwipeForAPZ(
 339       const mozilla::PanGestureInput& aPanInput,
 340       const mozilla::layers::APZEventResult& aApzResult);
 341
 342   // Returns true if |aPanInput| event was used for SwipeTracker, false
 343   // otherwise.
 344   bool MayStartSwipeForNonAPZ(const mozilla::PanGestureInput& aPanInput);
 345
 346   void NotifyWindowDestroyed();
 347   void NotifySizeMoveDone();
 348
 349   using ByMoveToRect = nsIWidgetListener::ByMoveToRect;
 350   void NotifyWindowMoved(int32_t aX, int32_t aY,
 351                          ByMoveToRect = ByMoveToRect::No);
 352
 353   // Should be called by derived implementations to notify on system color and
 354   // theme changes.
 355   void NotifyThemeChanged(mozilla::widget::ThemeChangeKind);
 356
 357   void NotifyAPZOfDPIChange();
 358
 359 #ifdef ACCESSIBILITY
 360   // Get the accessible for the window.
 361   mozilla::a11y::LocalAccessible* GetRootAccessible();
 362 #endif
 363
 364   // Return true if this is a simple widget (that is typically not worth
 365   // accelerating)
 366   bool IsSmallPopup() const;
 367
 368   PopupLevel GetPopupLevel() { return mPopupLevel; }
 369
 370   // return true if this is a popup widget with a native titlebar
 371   bool IsPopupWithTitleBar() const {
 372     return (mWindowType == WindowType::Popup &&
 373             mBorderStyle != BorderStyle::Default &&
 374             mBorderStyle & BorderStyle::Title);
 375   }
 376
 377   void ReparentNativeWidget(nsIWidget* aNewParent) override {}
 378
 379   const SizeConstraints GetSizeConstraints() override;
 380   void SetSizeConstraints(const SizeConstraints& aConstraints) override;
 381
 382   void StartAsyncScrollbarDrag(const AsyncDragMetrics& aDragMetrics) override;
 383
 384   bool StartAsyncAutoscroll(const ScreenPoint& aAnchorLocation,
 385                             const ScrollableLayerGuid& aGuid) override;
 386
 387   void StopAsyncAutoscroll(const ScrollableLayerGuid& aGuid) override;
 388
 389   mozilla::layers::LayersId GetRootLayerTreeId() override;
 390
 391   /**
 392    * Use this when GetLayerManager() returns a BasicLayerManager
 393    * (nsBaseWidget::GetLayerManager() does). This sets up the widget's
 394    * layer manager to temporarily render into aTarget.
 395    *
 396    * |aNaturalWidgetBounds| is the un-rotated bounds of |aWidget|.
 397    * |aRotation| is the "virtual rotation" to apply when rendering to
 398    * the target.  When |aRotation| is ROTATION_0,
 399    * |aNaturalWidgetBounds| is not used.
 400    */
 401   class AutoLayerManagerSetup {
 402    public:
 403     AutoLayerManagerSetup(nsBaseWidget* aWidget, gfxContext* aTarget,
 404                           BufferMode aDoubleBuffering);
 405     ~AutoLayerManagerSetup();
 406
 407    private:
 408     nsBaseWidget* mWidget;
 409     mozilla::FallbackRenderer* mRenderer = nullptr;
 410   };
 411   friend class AutoLayerManagerSetup;
 412
 413   virtual bool ShouldUseOffMainThreadCompositing();
 414
 415   static nsIRollupListener* GetActiveRollupListener();
 416
 417   void Shutdown();
 418
 419   void QuitIME();
 420
 421   // These functions should be called at the start and end of a "live" widget
 422   // resize (i.e. when the window contents are repainting during the resize,
 423   // such as when the user drags a window border). It will suppress the
 424   // displayport during the live resize to avoid unneccessary overpainting.
 425   void NotifyLiveResizeStarted();
 426   void NotifyLiveResizeStopped();
 427
 428 #if defined(MOZ_WIDGET_ANDROID)
 429   void RecvToolbarAnimatorMessageFromCompositor(int32_t) override{};
 430   void UpdateRootFrameMetrics(const ScreenPoint& aScrollOffset,
 431                               const CSSToScreenScale& aZoom) override{};
 432   void RecvScreenPixels(mozilla::ipc::Shmem&& aMem, const ScreenIntSize& aSize,
 433                         bool aNeedsYFlip) override{};
 434 #endif
 435
 436   virtual void LocalesChanged() {}
 437
 438   virtual void NotifyOcclusionState(mozilla::widget::OcclusionState aState) {}
 439
 440  protected:
 441   // These are methods for CompositorWidgetWrapper, and should only be
 442   // accessed from that class. Derived widgets can choose which methods to
 443   // implement, or none if supporting out-of-process compositing.
 444   virtual bool PreRender(mozilla::widget::WidgetRenderingContext* aContext) {
 445     return true;
 446   }
 447   virtual void PostRender(mozilla::widget::WidgetRenderingContext* aContext) {}
 448   virtual RefPtr<mozilla::layers::NativeLayerRoot> GetNativeLayerRoot() {
 449     return nullptr;
 450   }
 451   virtual already_AddRefed<DrawTarget> StartRemoteDrawing();
 452   virtual already_AddRefed<DrawTarget> StartRemoteDrawingInRegion(
 453       const LayoutDeviceIntRegion& aInvalidRegion, BufferMode* aBufferMode) {
 454     return StartRemoteDrawing();
 455   }
 456   virtual void EndRemoteDrawing() {}
 457   virtual void EndRemoteDrawingInRegion(
 458       DrawTarget* aDrawTarget, const LayoutDeviceIntRegion& aInvalidRegion) {
 459     EndRemoteDrawing();
 460   }
 461   virtual void CleanupRemoteDrawing() {}
 462   virtual void CleanupWindowEffects() {}
 463   virtual bool InitCompositor(mozilla::layers::Compositor* aCompositor) {
 464     return true;
 465   }
 466   virtual uint32_t GetGLFrameBufferFormat();
 467   virtual bool CompositorInitiallyPaused() { return false; }
 468
 469  protected:
 470   void ResolveIconName(const nsAString& aIconName, const nsAString& aIconSuffix,
 471                        nsIFile** aResult);
 472   virtual void OnDestroy();
 473   void BaseCreate(nsIWidget* aParent, InitData* aInitData);
 474
 475   virtual void ConfigureAPZCTreeManager();
 476   virtual void ConfigureAPZControllerThread();
 477   virtual already_AddRefed<GeckoContentController>
 478   CreateRootContentController();
 479
 480   // Dispatch an event that has already been routed through APZ.
 481   nsEventStatus ProcessUntransformedAPZEvent(
 482       mozilla::WidgetInputEvent* aEvent,
 483       const mozilla::layers::APZEventResult& aApzResult);
 484
 485   nsresult SynthesizeNativeKeyEvent(int32_t aNativeKeyboardLayout,
 486                                     int32_t aNativeKeyCode,
 487                                     uint32_t aModifierFlags,
 488                                     const nsAString& aCharacters,
 489                                     const nsAString& aUnmodifiedCharacters,
 490                                     nsIObserver* aObserver) override {
 491     mozilla::widget::AutoObserverNotifier notifier(aObserver, "keyevent");
 492     return NS_ERROR_UNEXPECTED;
 493   }
 494
 495   nsresult SynthesizeNativeMouseEvent(LayoutDeviceIntPoint aPoint,
 496                                       NativeMouseMessage aNativeMessage,
 497                                       mozilla::MouseButton aButton,
 498                                       nsIWidget::Modifiers aModifierFlags,
 499                                       nsIObserver* aObserver) override {
 500     mozilla::widget::AutoObserverNotifier notifier(aObserver, "mouseevent");
 501     return NS_ERROR_UNEXPECTED;
 502   }
 503
 504   nsresult SynthesizeNativeMouseMove(LayoutDeviceIntPoint aPoint,
 505                                      nsIObserver* aObserver) override {
 506     mozilla::widget::AutoObserverNotifier notifier(aObserver, "mouseevent");
 507     return NS_ERROR_UNEXPECTED;
 508   }
 509
 510   nsresult SynthesizeNativeMouseScrollEvent(
 511       LayoutDeviceIntPoint aPoint, uint32_t aNativeMessage, double aDeltaX,
 512       double aDeltaY, double aDeltaZ, uint32_t aModifierFlags,
 513       uint32_t aAdditionalFlags, nsIObserver* aObserver) override {
 514     mozilla::widget::AutoObserverNotifier notifier(aObserver,
 515                                                    "mousescrollevent");
 516     return NS_ERROR_UNEXPECTED;
 517   }
 518
 519   nsresult SynthesizeNativeTouchPoint(uint32_t aPointerId,
 520                                       TouchPointerState aPointerState,
 521                                       LayoutDeviceIntPoint aPoint,
 522                                       double aPointerPressure,
 523                                       uint32_t aPointerOrientation,
 524                                       nsIObserver* aObserver) override {
 525     mozilla::widget::AutoObserverNotifier notifier(aObserver, "touchpoint");
 526     return NS_ERROR_UNEXPECTED;
 527   }
 528
 529   nsresult SynthesizeNativeTouchPadPinch(TouchpadGesturePhase aEventPhase,
 530                                          float aScale,
 531                                          LayoutDeviceIntPoint aPoint,
 532                                          int32_t aModifierFlags) override {
 533     MOZ_RELEASE_ASSERT(
 534         false, "This method is not implemented on the current platform");
 535     return NS_ERROR_UNEXPECTED;
 536   }
 537
 538   nsresult SynthesizeNativePenInput(uint32_t aPointerId,
 539                                     TouchPointerState aPointerState,
 540                                     LayoutDeviceIntPoint aPoint,
 541                                     double aPressure, uint32_t aRotation,
 542                                     int32_t aTiltX, int32_t aTiltY,
 543                                     int32_t aButton,
 544                                     nsIObserver* aObserver) override {
 545     MOZ_RELEASE_ASSERT(
 546         false, "This method is not implemented on the current platform");
 547     return NS_ERROR_UNEXPECTED;
 548   }
 549
 550   nsresult SynthesizeNativeTouchpadDoubleTap(LayoutDeviceIntPoint aPoint,
 551                                              uint32_t aModifierFlags) override {
 552     MOZ_RELEASE_ASSERT(
 553         false, "This method is not implemented on the current platform");
 554     return NS_ERROR_UNEXPECTED;
 555   }
 556
 557   nsresult SynthesizeNativeTouchpadPan(TouchpadGesturePhase aEventPhase,
 558                                        LayoutDeviceIntPoint aPoint,
 559                                        double aDeltaX, double aDeltaY,
 560                                        int32_t aModifierFlags,
 561                                        nsIObserver* aObserver) override {
 562     MOZ_RELEASE_ASSERT(
 563         false, "This method is not implemented on the current platform");
 564     return NS_ERROR_UNEXPECTED;
 565   }
 566
 567   /**
 568    * GetPseudoIMEContext() returns pseudo IME context when TextEventDispatcher
 569    * has non-native input transaction.  Otherwise, returns nullptr.
 570    */
 571   void* GetPseudoIMEContext();
 572
 573  protected:
 574   virtual already_AddRefed<nsIWidget> AllocateChildPopupWidget() {
 575     return nsIWidget::CreateChildWindow();
 576   }
 577
 578   WindowRenderer* CreateFallbackRenderer();
 579
 580   PopupType GetPopupType() const { return mPopupType; }
 581
 582   bool HasRemoteContent() const { return mHasRemoteContent; }
 583
 584   /**
 585    * Apply the current size constraints to the given size.
 586    *
 587    * @param aWidth width to constrain
 588    * @param aHeight height to constrain
 589    */
 590   void ConstrainSize(int32_t* aWidth, int32_t* aHeight) override {
 591     SizeConstraints c = GetSizeConstraints();
 592     *aWidth = std::max(c.mMinSize.width, std::min(c.mMaxSize.width, *aWidth));
 593     *aHeight =
 594         std::max(c.mMinSize.height, std::min(c.mMaxSize.height, *aHeight));
 595   }
 596
 597   CompositorBridgeChild* GetRemoteRenderer() override;
 598
 599   void ClearCachedWebrenderResources() override;
 600
 601   void ClearWebrenderAnimationResources() override;
 602
 603   bool SetNeedFastSnaphot() override;
 604
 605   /**
 606    * Notify the widget that this window is being used with OMTC.
 607    */
 608   virtual void WindowUsesOMTC() {}
 609   virtual void RegisterTouchWindow() {}
 610
 611   mozilla::dom::Document* GetDocument() const;
 612
 613   void EnsureTextEventDispatcher();
 614
 615   // Notify the compositor that a device reset has occurred.
 616   void OnRenderingDeviceReset();
 617
 618   bool UseAPZ();
 619
 620   bool AllowWebRenderForThisWindow();
 621
 622   /**
 623    * For widgets that support synthesizing native touch events, this function
 624    * can be used to manage the current state of synthetic pointers. Each widget
 625    * must maintain its own MultiTouchInput instance and pass it in as the state,
 626    * along with the desired parameters for the changes. This function returns
 627    * a new MultiTouchInput object that is ready to be dispatched.
 628    */
 629   mozilla::MultiTouchInput UpdateSynthesizedTouchState(
 630       mozilla::MultiTouchInput* aState, mozilla::TimeStamp aTimeStamp,
 631       uint32_t aPointerId, TouchPointerState aPointerState,
 632       LayoutDeviceIntPoint aPoint, double aPointerPressure,
 633       uint32_t aPointerOrientation);
 634
 635   /**
 636    * Dispatch the given MultiTouchInput through APZ to Gecko (if APZ is enabled)
 637    * or directly to gecko (if APZ is not enabled). This function must only
 638    * be called from the main thread, and if APZ is enabled, that must also be
 639    * the APZ controller thread.
 640    */
 641   void DispatchTouchInput(
 642       mozilla::MultiTouchInput& aInput,
 643       uint16_t aInputSource =
 644           mozilla::dom::MouseEvent_Binding::MOZ_SOURCE_TOUCH);
 645
 646   /**
 647    * Dispatch the given PanGestureInput 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 DispatchPanGestureInput(mozilla::PanGestureInput& aInput);
 653   void DispatchPinchGestureInput(mozilla::PinchGestureInput& aInput);
 654
 655   static bool ConvertStatus(nsEventStatus aStatus) {
 656     return aStatus == nsEventStatus_eConsumeNoDefault;
 657   }
 658
 659  protected:
 660   // Returns whether compositing should use an external surface size.
 661   virtual bool UseExternalCompositingSurface() const { return false; }
 662
 663   /**
 664    * Starts the OMTC compositor destruction sequence.
 665    *
 666    * When this function returns, the compositor should not be
 667    * able to access the opengl context anymore.
 668    * It is safe to call it several times if platform implementations
 669    * require the compositor to be destroyed before ~nsBaseWidget is
 670    * reached (This is the case with gtk2 for instance).
 671    */
 672   virtual void DestroyCompositor();
 673   void DestroyLayerManager();
 674   void ReleaseContentController();
 675   void RevokeTransactionIdAllocator();
 676
 677   void FreeShutdownObserver();
 678   void FreeLocalesChangedObserver();
 679
 680   bool IsPIPWindow() const { return mIsPIPWindow; };
 681
 682   nsIWidgetListener* mWidgetListener;
 683   nsIWidgetListener* mAttachedWidgetListener;
 684   nsIWidgetListener* mPreviouslyAttachedWidgetListener;
 685   RefPtr<WindowRenderer> mWindowRenderer;
 686   RefPtr<CompositorSession> mCompositorSession;
 687   RefPtr<CompositorBridgeChild> mCompositorBridgeChild;
 688
 689   mozilla::UniquePtr<mozilla::Mutex> mCompositorVsyncDispatcherLock;
 690   RefPtr<mozilla::CompositorVsyncDispatcher> mCompositorVsyncDispatcher;
 691
 692   RefPtr<IAPZCTreeManager> mAPZC;
 693   RefPtr<GeckoContentController> mRootContentController;
 694   RefPtr<APZEventState> mAPZEventState;
 695   RefPtr<WidgetShutdownObserver> mShutdownObserver;
 696   RefPtr<LocalesChangedObserver> mLocalesChangedObserver;
 697   RefPtr<TextEventDispatcher> mTextEventDispatcher;
 698   RefPtr<mozilla::SwipeTracker> mSwipeTracker;
 699   mozilla::UniquePtr<mozilla::SwipeEventQueue> mSwipeEventQueue;
 700   Cursor mCursor;
 701   bool mCustomCursorAllowed = true;
 702   BorderStyle mBorderStyle;
 703   LayoutDeviceIntRect mBounds;
 704   bool mIsTiled;
 705   PopupLevel mPopupLevel;
 706   PopupType mPopupType;
 707   SizeConstraints mSizeConstraints;
 708   bool mHasRemoteContent;
 709
 710   struct FullscreenSavedState {
 711     DesktopRect windowRect;
 712     DesktopRect screenRect;
 713   };
 714   mozilla::Maybe<FullscreenSavedState> mSavedBounds;
 715
 716   bool mUpdateCursor;
 717   bool mUseAttachedEvents;
 718   bool mIMEHasFocus;
 719   bool mIMEHasQuit;
 720   bool mIsFullyOccluded;
 721   bool mNeedFastSnaphot;
 722   // This flag is only used when APZ is off. It indicates that the current pan
 723   // gesture was processed as a swipe. Sometimes the swipe animation can finish
 724   // before momentum events of the pan gesture have stopped firing, so this
 725   // flag tells us that we shouldn't allow the remaining events to cause
 726   // scrolling. It is reset to false once a new gesture starts (as indicated by
 727   // a PANGESTURE_(MAY)START event).
 728   bool mCurrentPanGestureBelongsToSwipe;
 729
 730   // It's PictureInPicture window.
 731   bool mIsPIPWindow : 1;
 732
 733   struct InitialZoomConstraints {
 734     InitialZoomConstraints(const uint32_t& aPresShellID,
 735                            const ScrollableLayerGuid::ViewID& aViewID,
 736                            const ZoomConstraints& aConstraints)
 737         : mPresShellID(aPresShellID),
 738           mViewID(aViewID),
 739           mConstraints(aConstraints) {}
 740
 741     uint32_t mPresShellID;
 742     ScrollableLayerGuid::ViewID mViewID;
 743     ZoomConstraints mConstraints;
 744   };
 745
 746   mozilla::Maybe<InitialZoomConstraints> mInitialZoomConstraints;
 747
 748   // This points to the resize listeners who have been notified that a live
 749   // resize is in progress. This should always be empty when a live-resize is
 750   // not in progress.
 751   nsTArray<RefPtr<mozilla::LiveResizeListener>> mLiveResizeListeners;
 752
 753 #ifdef DEBUG
 754  protected:
 755   static nsAutoString debug_GuiEventToString(
 756       mozilla::WidgetGUIEvent* aGuiEvent);
 757
 758   static void debug_DumpInvalidate(FILE* aFileOut, nsIWidget* aWidget,
 759                                    const LayoutDeviceIntRect* aRect,
 760                                    const char* aWidgetName, int32_t aWindowID);
 761
 762   static void debug_DumpEvent(FILE* aFileOut, nsIWidget* aWidget,
 763                               mozilla::WidgetGUIEvent* aGuiEvent,
 764                               const char* aWidgetName, int32_t aWindowID);
 765
 766   static void debug_DumpPaintEvent(FILE* aFileOut, nsIWidget* aWidget,
 767                                    const nsIntRegion& aPaintEvent,
 768                                    const char* aWidgetName, int32_t aWindowID);
 769
 770   static bool debug_GetCachedBoolPref(const char* aPrefName);
 771 #endif
 772
 773  private:
 774   already_AddRefed<mozilla::layers::WebRenderLayerManager>
 775   CreateCompositorSession(int aWidth, int aHeight,
 776                           mozilla::layers::CompositorOptions* aOptionsOut);
 777 };
 778
 779 #endif  // nsBaseWidget_h__