summaryrefslogtreecommitdiffstats
path: root/widget/cocoa/nsChildView.h
blob: 3dfc3af9d81f58788e49b0c7b1065a799c789141 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
/* -*- 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;

  // Whether the drag and drop was performed.
  BOOL mPerformedDrag;

  // 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_