Adding upstream version 115.7.0esr.upstream/115.7.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 591 insertions, 0 deletions

diff --git a/widget/cocoa/nsChildView.h b/widget/cocoa/nsChildView.h
new file mode 100644
index 0000000000..b8095b991e
--- /dev/null
+++ b/widget/cocoa/nsChildView.h
@@ -0,0 +1,591 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef nsChildView_h_
+#define nsChildView_h_
+
+// formal protocols
+#include "mozView.h"
+#ifdef ACCESSIBILITY
+#  include "mozilla/a11y/LocalAccessible.h"
+#  include "mozAccessibleProtocol.h"
+#endif
+
+#include "nsISupports.h"
+#include "nsBaseWidget.h"
+#include "nsIWeakReferenceUtils.h"
+#include "TextInputHandler.h"
+#include "nsCocoaUtils.h"
+#include "gfxQuartzSurface.h"
+#include "GLContextTypes.h"
+#include "mozilla/DataMutex.h"
+#include "mozilla/Mutex.h"
+#include "nsRegion.h"
+#include "mozilla/MouseEvents.h"
+#include "mozilla/UniquePtr.h"
+#include "mozilla/webrender/WebRenderTypes.h"
+
+#include "nsString.h"
+#include "nsIDragService.h"
+#include "ViewRegion.h"
+#include "CFTypeRefPtr.h"
+
+#import <Carbon/Carbon.h>
+#import <Cocoa/Cocoa.h>
+#import <AppKit/NSOpenGL.h>
+
+class nsChildView;
+class nsCocoaWindow;
+
+namespace {
+class GLPresenter;
+}  // namespace
+
+namespace mozilla {
+enum class NativeKeyBindingsType : uint8_t;
+
+class InputData;
+class PanGestureInput;
+class VibrancyManager;
+namespace layers {
+class GLManager;
+class IAPZCTreeManager;
+class NativeLayerRootCA;
+class NativeLayerCA;
+}  // namespace layers
+namespace widget {
+class WidgetRenderingContext;
+}  // namespace widget
+}  // namespace mozilla
+
+@class PixelHostingView;
+
+@interface NSEvent (Undocumented)
+
+// Return Cocoa event's corresponding Carbon event.  Not initialized (on
+// synthetic events) until the OS actually "sends" the event.  This method
+// has been present in the same form since at least OS X 10.2.8.
+- (EventRef)_eventRef;
+
+// stage From 10.10.3 for force touch event
+@property(readonly) NSInteger stage;
+
+@end
+
+@interface NSView (Undocumented)
+
+// Undocumented method of one or more of NSFrameView's subclasses.  Called
+// when one or more of the titlebar buttons needs to be repositioned, to
+// disappear, or to reappear (say if the window's style changes).  If
+// 'redisplay' is true, the entire titlebar (the window's top 22 pixels) is
+// marked as needing redisplay.  This method has been present in the same
+// format since at least OS X 10.5.
+- (void)_tileTitlebarAndRedisplay:(BOOL)redisplay;
+
+// The following undocumented methods are used to work around bug 1069658,
+// which is an Apple bug or design flaw that effects Yosemite.  None of them
+// were present prior to Yosemite (OS X 10.10).
+- (NSView*)titlebarView;                   // Method of NSThemeFrame
+- (NSView*)titlebarContainerView;          // Method of NSThemeFrame
+- (BOOL)transparent;                       // Method of NSTitlebarView and NSTitlebarContainerView
+- (void)setTransparent:(BOOL)transparent;  // Method of NSTitlebarView and
+                                           // NSTitlebarContainerView
+
+// Available since 10.7.4:
+- (void)viewDidChangeBackingProperties;
+@end
+
+@interface ChildView : NSView <
+#ifdef ACCESSIBILITY
+                           mozAccessible,
+#endif
+                           mozView,
+                           NSTextInputClient,
+                           NSDraggingSource,
+                           NSDraggingDestination,
+                           NSPasteboardItemDataProvider> {
+ @private
+  // the nsChildView that created the view. It retains this NSView, so
+  // the link back to it must be weak.
+  nsChildView* mGeckoChild;
+
+  // Text input handler for mGeckoChild and us.  Note that this is a weak
+  // reference.  Ideally, this should be a strong reference but a ChildView
+  // object can live longer than the mGeckoChild that owns it.  And if
+  // mTextInputHandler were a strong reference, this would make it difficult
+  // for Gecko's leak detector to detect leaked TextInputHandler objects.
+  // This is initialized by [mozView installTextInputHandler:aHandler] and
+  // cleared by [mozView uninstallTextInputHandler].
+  mozilla::widget::TextInputHandler* mTextInputHandler;  // [WEAK]
+
+  // when mouseDown: is called, we store its event here (strong)
+  NSEvent* mLastMouseDownEvent;
+
+  // Needed for IME support in e10s mode.  Strong.
+  NSEvent* mLastKeyDownEvent;
+
+  // Whether the last mouse down event was blocked from Gecko.
+  BOOL mBlockedLastMouseDown;
+
+  // when acceptsFirstMouse: is called, we store the event here (strong)
+  NSEvent* mClickThroughMouseDownEvent;
+
+  // WheelStart/Stop events should always come in pairs. This BOOL records the
+  // last received event so that, when we receive one of the events, we make sure
+  // to send its pair event first, in case we didn't yet for any reason.
+  BOOL mExpectingWheelStop;
+
+  // Whether we're inside updateRootCALayer at the moment.
+  BOOL mIsUpdatingLayer;
+
+  // Holds our drag service across multiple drag calls. The reference to the
+  // service is obtained when the mouse enters the view and is released when
+  // the mouse exits or there is a drop. This prevents us from having to
+  // re-establish the connection to the service manager many times per second
+  // when handling |draggingUpdated:| messages.
+  nsIDragService* mDragService;
+
+  // Gestures support
+  //
+  // mGestureState is used to detect when Cocoa has called both
+  // magnifyWithEvent and rotateWithEvent within the same
+  // beginGestureWithEvent and endGestureWithEvent sequence. We
+  // discard the spurious gesture event so as not to confuse Gecko.
+  //
+  // mCumulativeRotation keeps track of the total amount of rotation
+  // performed during a rotate gesture so we can send that value with
+  // the final MozRotateGesture event.
+  enum {
+    eGestureState_None,
+    eGestureState_StartGesture,
+    eGestureState_MagnifyGesture,
+    eGestureState_RotateGesture
+  } mGestureState;
+  float mCumulativeRotation;
+
+#ifdef __LP64__
+  // Support for fluid swipe tracking.
+  BOOL* mCancelSwipeAnimation;
+#endif
+
+  // Whether this uses off-main-thread compositing.
+  BOOL mUsingOMTCompositor;
+
+  // Subviews of self, which act as container views for vibrancy views and
+  // non-draggable views.
+  NSView* mVibrancyViewsContainer;      // [STRONG]
+  NSView* mNonDraggableViewsContainer;  // [STRONG]
+
+  // The layer-backed view that hosts our drawing. Always non-null.
+  // This is a subview of self so that it can be ordered on top of mVibrancyViewsContainer.
+  PixelHostingView* mPixelHostingView;
+
+  // The CALayer that wraps Gecko's rendered contents. It's a sublayer of
+  // mPixelHostingView's backing layer. Always non-null.
+  CALayer* mRootCALayer;  // [STRONG]
+
+  // Last pressure stage by trackpad's force click
+  NSInteger mLastPressureStage;
+}
+
+// class initialization
++ (void)initialize;
+
++ (void)registerViewForDraggedTypes:(NSView*)aView;
+
+// these are sent to the first responder when the window key status changes
+- (void)viewsWindowDidBecomeKey;
+- (void)viewsWindowDidResignKey;
+
+// Stop NSView hierarchy being changed during [ChildView drawRect:]
+- (void)delayedTearDown;
+
+- (void)handleMouseMoved:(NSEvent*)aEvent;
+
+- (void)sendMouseEnterOrExitEvent:(NSEvent*)aEvent
+                            enter:(BOOL)aEnter
+                         exitFrom:(mozilla::WidgetMouseEvent::ExitFrom)aExitFrom;
+
+// Call this during operations that will likely trigger a main thread
+// CoreAnimation paint of the window, during which Gecko should do its own
+// painting and present the results atomically with that main thread transaction.
+// This method will suspend off-thread window updates so that the upcoming paint
+// can be atomic, and mark the layer as needing display so that
+// HandleMainThreadCATransaction gets called and Gecko gets a chance to paint.
+- (void)ensureNextCompositeIsAtomicWithMainThreadPaint;
+
+- (NSView*)vibrancyViewsContainer;
+- (NSView*)nonDraggableViewsContainer;
+- (NSView*)pixelHostingView;
+
+- (BOOL)isCoveringTitlebar;
+
+- (void)viewWillStartLiveResize;
+- (void)viewDidEndLiveResize;
+
+/*
+ * Gestures support
+ *
+ * The prototypes swipeWithEvent, beginGestureWithEvent, smartMagnifyWithEvent,
+ * rotateWithEvent and endGestureWithEvent were obtained from the following
+ * links:
+ * https://developer.apple.com/library/mac/#documentation/Cocoa/Reference/ApplicationKit/Classes/NSResponder_Class/Reference/Reference.html
+ * https://developer.apple.com/library/mac/#releasenotes/Cocoa/AppKit.html
+ */
+- (void)swipeWithEvent:(NSEvent*)anEvent;
+- (void)beginGestureWithEvent:(NSEvent*)anEvent;
+- (void)magnifyWithEvent:(NSEvent*)anEvent;
+- (void)smartMagnifyWithEvent:(NSEvent*)anEvent;
+- (void)rotateWithEvent:(NSEvent*)anEvent;
+- (void)endGestureWithEvent:(NSEvent*)anEvent;
+
+- (void)scrollWheel:(NSEvent*)anEvent;
+
+- (void)setUsingOMTCompositor:(BOOL)aUseOMTC;
+
+- (NSEvent*)lastKeyDownEvent;
+
++ (uint32_t)sUniqueKeyEventId;
+
++ (NSMutableDictionary*)sNativeKeyEventsMap;
+@end
+
+class ChildViewMouseTracker {
+ public:
+  static void MouseMoved(NSEvent* aEvent);
+  static void MouseScrolled(NSEvent* aEvent);
+  static void OnDestroyView(ChildView* aView);
+  static void OnDestroyWindow(NSWindow* aWindow);
+  static BOOL WindowAcceptsEvent(NSWindow* aWindow, NSEvent* aEvent, ChildView* aView,
+                                 BOOL isClickThrough = NO);
+  static void MouseExitedWindow(NSEvent* aEvent);
+  static void MouseEnteredWindow(NSEvent* aEvent);
+  static void NativeMenuOpened();
+  static void NativeMenuClosed();
+  static void ReEvaluateMouseEnterState(NSEvent* aEvent = nil, ChildView* aOldView = nil);
+  static void ResendLastMouseMoveEvent();
+  static ChildView* ViewForEvent(NSEvent* aEvent);
+
+  static ChildView* sLastMouseEventView;
+  static NSEvent* sLastMouseMoveEvent;
+  static NSWindow* sWindowUnderMouse;
+  static NSPoint sLastScrollEventScreenLocation;
+};
+
+//-------------------------------------------------------------------------
+//
+// nsChildView
+//
+//-------------------------------------------------------------------------
+
+class nsChildView final : public nsBaseWidget {
+ private:
+  typedef nsBaseWidget Inherited;
+  typedef mozilla::layers::IAPZCTreeManager IAPZCTreeManager;
+
+ public:
+  nsChildView();
+
+  // nsIWidget interface
+  [[nodiscard]] virtual nsresult Create(nsIWidget* aParent, nsNativeWidget aNativeParent,
+                                        const LayoutDeviceIntRect& aRect,
+                                        InitData* = nullptr) override;
+
+  virtual void Destroy() override;
+
+  virtual void Show(bool aState) override;
+  virtual bool IsVisible() const override;
+
+  virtual void SetParent(nsIWidget* aNewParent) override;
+  virtual nsIWidget* GetParent(void) override;
+  virtual float GetDPI() override;
+
+  virtual void Move(double aX, double aY) override;
+  virtual void Resize(double aWidth, double aHeight, bool aRepaint) override;
+  virtual void Resize(double aX, double aY, double aWidth, double aHeight, bool aRepaint) override;
+
+  virtual void Enable(bool aState) override;
+  virtual bool IsEnabled() const override;
+
+  virtual nsSizeMode SizeMode() override { return mSizeMode; }
+  virtual void SetSizeMode(nsSizeMode aMode) override { mSizeMode = aMode; }
+
+  virtual void SetFocus(Raise, mozilla::dom::CallerType aCallerType) override;
+  virtual LayoutDeviceIntRect GetBounds() override;
+  virtual LayoutDeviceIntRect GetClientBounds() override;
+  virtual LayoutDeviceIntRect GetScreenBounds() override;
+
+  // Refresh mBounds with up-to-date values from [mView frame].
+  // Only called if this nsChildView is the popup content view of a popup window.
+  // For popup windows, the nsIWidget interface to Gecko is provided by
+  // nsCocoaWindow, not by nsChildView. So nsCocoaWindow manages resize requests
+  // from Gecko, fires resize events, and resizes the native NSWindow and NSView.
+  void UpdateBoundsFromView();
+
+  // Returns the "backing scale factor" of the view's window, which is the
+  // ratio of pixels in the window's backing store to Cocoa points. Prior to
+  // HiDPI support in OS X 10.7, this was always 1.0, but in HiDPI mode it
+  // will be 2.0 (and might potentially other values as screen resolutions
+  // evolve). This gives the relationship between what Gecko calls "device
+  // pixels" and the Cocoa "points" coordinate system.
+  CGFloat BackingScaleFactor() const;
+
+  mozilla::DesktopToLayoutDeviceScale GetDesktopToDeviceScale() final {
+    return mozilla::DesktopToLayoutDeviceScale(BackingScaleFactor());
+  }
+
+  // Call if the window's backing scale factor changes - i.e., it is moved
+  // between HiDPI and non-HiDPI screens
+  void BackingScaleFactorChanged();
+
+  virtual double GetDefaultScaleInternal() override;
+
+  virtual int32_t RoundsWidgetCoordinatesTo() override;
+
+  virtual void Invalidate(const LayoutDeviceIntRect& aRect) override;
+  void EnsureContentLayerForMainThreadPainting();
+
+  virtual void* GetNativeData(uint32_t aDataType) override;
+  virtual LayoutDeviceIntPoint WidgetToScreenOffset() override;
+  virtual bool ShowsResizeIndicator(LayoutDeviceIntRect* aResizerRect) override { return false; }
+
+  virtual nsresult DispatchEvent(mozilla::WidgetGUIEvent* aEvent, nsEventStatus& aStatus) override;
+
+  virtual bool WidgetTypeSupportsAcceleration() override;
+  virtual bool ShouldUseOffMainThreadCompositing() override;
+
+  virtual void SetCursor(const Cursor&) override;
+
+  virtual nsresult SetTitle(const nsAString& title) override;
+
+  [[nodiscard]] virtual nsresult GetAttention(int32_t aCycleCount) override;
+
+  virtual bool HasPendingInputEvent() override;
+
+  bool SendEventToNativeMenuSystem(NSEvent* aEvent);
+  virtual void PostHandleKeyEvent(mozilla::WidgetKeyboardEvent* aEvent) override;
+  virtual nsresult ActivateNativeMenuItemAt(const nsAString& indexString) override;
+  virtual nsresult ForceUpdateNativeMenuAt(const nsAString& indexString) override;
+  [[nodiscard]] virtual nsresult GetSelectionAsPlaintext(nsAString& aResult) override;
+
+  virtual void SetInputContext(const InputContext& aContext,
+                               const InputContextAction& aAction) override;
+  virtual InputContext GetInputContext() override;
+  virtual TextEventDispatcherListener* GetNativeTextEventDispatcherListener() override;
+  [[nodiscard]] virtual nsresult AttachNativeKeyEvent(
+      mozilla::WidgetKeyboardEvent& aEvent) override;
+  MOZ_CAN_RUN_SCRIPT virtual bool GetEditCommands(
+      mozilla::NativeKeyBindingsType aType, const mozilla::WidgetKeyboardEvent& aEvent,
+      nsTArray<mozilla::CommandInt>& aCommands) override;
+
+  virtual void SuppressAnimation(bool aSuppress) override;
+
+  virtual nsresult SynthesizeNativeKeyEvent(int32_t aNativeKeyboardLayout, int32_t aNativeKeyCode,
+                                            uint32_t aModifierFlags, const nsAString& aCharacters,
+                                            const nsAString& aUnmodifiedCharacters,
+                                            nsIObserver* aObserver) override;
+
+  virtual nsresult SynthesizeNativeMouseEvent(LayoutDeviceIntPoint aPoint,
+                                              NativeMouseMessage aNativeMessage,
+                                              mozilla::MouseButton aButton,
+                                              nsIWidget::Modifiers aModifierFlags,
+                                              nsIObserver* aObserver) override;
+
+  virtual nsresult SynthesizeNativeMouseMove(LayoutDeviceIntPoint aPoint,
+                                             nsIObserver* aObserver) override {
+    return SynthesizeNativeMouseEvent(aPoint, NativeMouseMessage::Move,
+                                      mozilla::MouseButton::eNotPressed,
+                                      nsIWidget::Modifiers::NO_MODIFIERS, aObserver);
+  }
+  virtual nsresult SynthesizeNativeMouseScrollEvent(LayoutDeviceIntPoint aPoint,
+                                                    uint32_t aNativeMessage, double aDeltaX,
+                                                    double aDeltaY, double aDeltaZ,
+                                                    uint32_t aModifierFlags,
+                                                    uint32_t aAdditionalFlags,
+                                                    nsIObserver* aObserver) override;
+  virtual nsresult SynthesizeNativeTouchPoint(uint32_t aPointerId, TouchPointerState aPointerState,
+                                              LayoutDeviceIntPoint aPoint, double aPointerPressure,
+                                              uint32_t aPointerOrientation,
+                                              nsIObserver* aObserver) override;
+
+  virtual nsresult SynthesizeNativeTouchpadDoubleTap(LayoutDeviceIntPoint aPoint,
+                                                     uint32_t aModifierFlags) override;
+
+  // Mac specific methods
+  void WillPaintWindow();
+  bool PaintWindow(LayoutDeviceIntRegion aRegion);
+  bool PaintWindowInDrawTarget(mozilla::gfx::DrawTarget* aDT, const LayoutDeviceIntRegion& aRegion,
+                               const mozilla::gfx::IntSize& aSurfaceSize);
+
+  void PaintWindowInContentLayer();
+  void HandleMainThreadCATransaction();
+
+#ifdef ACCESSIBILITY
+  already_AddRefed<mozilla::a11y::LocalAccessible> GetDocumentAccessible();
+#endif
+
+  virtual void CreateCompositor() override;
+
+  virtual bool WidgetPaintsBackground() override { return true; }
+
+  virtual bool PreRender(mozilla::widget::WidgetRenderingContext* aContext) override;
+  virtual void PostRender(mozilla::widget::WidgetRenderingContext* aContext) override;
+  virtual RefPtr<mozilla::layers::NativeLayerRoot> GetNativeLayerRoot() override;
+
+  virtual void UpdateThemeGeometries(const nsTArray<ThemeGeometry>& aThemeGeometries) override;
+
+  virtual void UpdateWindowDraggingRegion(const LayoutDeviceIntRegion& aRegion) override;
+  LayoutDeviceIntRegion GetNonDraggableRegion() { return mNonDraggableRegion.Region(); }
+
+  virtual void LookUpDictionary(const nsAString& aText,
+                                const nsTArray<mozilla::FontRange>& aFontRangeArray,
+                                const bool aIsVertical,
+                                const LayoutDeviceIntPoint& aPoint) override;
+
+  void ResetParent();
+
+  static bool DoHasPendingInputEvent();
+  static uint32_t GetCurrentInputEventCount();
+  static void UpdateCurrentInputEventCount();
+
+  NSView<mozView>* GetEditorView();
+
+  nsCocoaWindow* GetAppWindowWidget() const;
+
+  virtual void ReparentNativeWidget(nsIWidget* aNewParent) override;
+
+  mozilla::widget::TextInputHandler* GetTextInputHandler() { return mTextInputHandler; }
+
+  // unit conversion convenience functions
+  int32_t CocoaPointsToDevPixels(CGFloat aPts) const {
+    return nsCocoaUtils::CocoaPointsToDevPixels(aPts, BackingScaleFactor());
+  }
+  LayoutDeviceIntPoint CocoaPointsToDevPixels(const NSPoint& aPt) const {
+    return nsCocoaUtils::CocoaPointsToDevPixels(aPt, BackingScaleFactor());
+  }
+  LayoutDeviceIntPoint CocoaPointsToDevPixelsRoundDown(const NSPoint& aPt) const {
+    return nsCocoaUtils::CocoaPointsToDevPixelsRoundDown(aPt, BackingScaleFactor());
+  }
+  LayoutDeviceIntRect CocoaPointsToDevPixels(const NSRect& aRect) const {
+    return nsCocoaUtils::CocoaPointsToDevPixels(aRect, BackingScaleFactor());
+  }
+  CGFloat DevPixelsToCocoaPoints(int32_t aPixels) const {
+    return nsCocoaUtils::DevPixelsToCocoaPoints(aPixels, BackingScaleFactor());
+  }
+  NSRect DevPixelsToCocoaPoints(const LayoutDeviceIntRect& aRect) const {
+    return nsCocoaUtils::DevPixelsToCocoaPoints(aRect, BackingScaleFactor());
+  }
+
+  virtual LayoutDeviceIntPoint GetClientOffset() override;
+
+  void DispatchAPZWheelInputEvent(mozilla::InputData& aEvent);
+  nsEventStatus DispatchAPZInputEvent(mozilla::InputData& aEvent);
+
+  void DispatchDoubleTapGesture(mozilla::TimeStamp aEventTimeStamp,
+                                LayoutDeviceIntPoint aScreenPosition,
+                                mozilla::Modifiers aModifiers);
+
+  // Called when the main thread enters a phase during which visual changes
+  // are imminent and any layer updates on the compositor thread would interfere
+  // with visual atomicity.
+  // "Async" CATransactions are CATransactions which happen on a thread that's
+  // not the main thread.
+  void SuspendAsyncCATransactions();
+
+  // Called when we know that the current main thread paint will be completed once
+  // the main thread goes back to the event loop.
+  void MaybeScheduleUnsuspendAsyncCATransactions();
+
+  // Called from the runnable dispatched by MaybeScheduleUnsuspendAsyncCATransactions().
+  // At this point we know that the main thread is done handling the visual change
+  // (such as a window resize) and we can start modifying CALayers from the
+  // compositor thread again.
+  void UnsuspendAsyncCATransactions();
+
+  // Called by nsCocoaWindow when the window's fullscreen state changes.
+  void UpdateFullscreen(bool aFullscreen);
+
+#ifdef DEBUG
+  // test only.
+  virtual nsresult SetHiDPIMode(bool aHiDPI) override;
+  virtual nsresult RestoreHiDPIMode() override;
+#endif
+
+ protected:
+  virtual ~nsChildView();
+
+  void ReportMoveEvent();
+  void ReportSizeEvent();
+
+  void TearDownView();
+
+  virtual already_AddRefed<nsIWidget> AllocateChildPopupWidget() override {
+    return nsIWidget::CreateTopLevelWindow();
+  }
+
+  void ConfigureAPZCTreeManager() override;
+  void ConfigureAPZControllerThread() override;
+
+  void UpdateVibrancy(const nsTArray<ThemeGeometry>& aThemeGeometries);
+  mozilla::VibrancyManager& EnsureVibrancyManager();
+
+  nsIWidget* GetWidgetForListenerEvents();
+
+ protected:
+  ChildView* mView;  // my parallel cocoa view, [STRONG]
+  RefPtr<mozilla::widget::TextInputHandler> mTextInputHandler;
+  InputContext mInputContext;
+
+  NSView* mParentView;
+  nsIWidget* mParentWidget;
+
+#ifdef ACCESSIBILITY
+  // weak ref to this childview's associated mozAccessible for speed reasons
+  // (we get queried for it *a lot* but don't want to own it)
+  nsWeakPtr mAccessible;
+#endif
+
+  // Held while the compositor (or WR renderer) thread is compositing.
+  // Protects from tearing down the view during compositing and from presenting
+  // half-composited layers to the screen.
+  mozilla::Mutex mCompositingLock MOZ_UNANNOTATED;
+
+  mozilla::ViewRegion mNonDraggableRegion;
+
+  // Cached value of [mView backingScaleFactor], to avoid sending two obj-c
+  // messages (respondsToSelector, backingScaleFactor) every time we need to
+  // use it.
+  // ** We'll need to reinitialize this if the backing resolution changes. **
+  mutable CGFloat mBackingScaleFactor;
+
+  bool mVisible;
+  nsSizeMode mSizeMode;
+  bool mDrawing;
+  bool mIsDispatchPaint;  // Is a paint event being dispatched
+
+  RefPtr<mozilla::layers::NativeLayerRootCA> mNativeLayerRoot;
+
+  // In BasicLayers mode, this is the CoreAnimation layer that contains the
+  // rendering from Gecko. It is a sublayer of mNativeLayerRoot's underlying
+  // wrapper layer.
+  // Lazily created by EnsureContentLayerForMainThreadPainting().
+  RefPtr<mozilla::layers::NativeLayerCA> mContentLayer;
+  RefPtr<mozilla::layers::SurfacePoolHandle> mPoolHandle;
+
+  // In BasicLayers mode, this is the invalid region of mContentLayer.
+  LayoutDeviceIntRegion mContentLayerInvalidRegion;
+
+  mozilla::UniquePtr<mozilla::VibrancyManager> mVibrancyManager;
+
+  RefPtr<mozilla::CancelableRunnable> mUnsuspendAsyncCATransactionsRunnable;
+
+  static uint32_t sLastInputEventCount;
+
+  // This is used by SynthesizeNativeTouchPoint to maintain state between
+  // multiple synthesized points
+  mozilla::UniquePtr<mozilla::MultiTouchInput> mSynthesizedTouchInput;
+};
+
+#endif  // nsChildView_h_