content/browser/renderer_host/render_widget_host_view_mac.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MAC_H_
   6 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MAC_H_
   7
   8 #import <Cocoa/Cocoa.h>
   9 #include <IOSurface/IOSurfaceAPI.h>
  10 #include <list>
  11 #include <map>
  12 #include <set>
  13 #include <string>
  14 #include <utility>
  15 #include <vector>
  16
  17 #include "base/mac/scoped_nsobject.h"
  18 #include "base/memory/scoped_ptr.h"
  19 #include "base/memory/weak_ptr.h"
  20 #include "base/time/time.h"
  21 #include "content/browser/compositor/browser_compositor_view_mac.h"
  22 #include "content/browser/compositor/delegated_frame_host.h"
  23 #include "content/browser/renderer_host/input/mouse_wheel_rails_filter_mac.h"
  24 #include "content/browser/renderer_host/render_widget_host_view_base.h"
  25 #include "content/common/content_export.h"
  26 #include "content/common/cursors/webcursor.h"
  27 #include "content/common/edit_command.h"
  28 #import "content/public/browser/render_widget_host_view_mac_base.h"
  29 #include "ipc/ipc_sender.h"
  30 #include "third_party/WebKit/public/web/WebCompositionUnderline.h"
  31 #include "ui/accelerated_widget_mac/accelerated_widget_mac.h"
  32 #include "ui/accelerated_widget_mac/display_link_mac.h"
  33 #include "ui/accelerated_widget_mac/io_surface_layer.h"
  34 #include "ui/base/cocoa/remote_layer_api.h"
  35 #import "ui/base/cocoa/tool_tip_base_view.h"
  36 #include "ui/gfx/display_observer.h"
  37
  38 namespace content {
  39 class RenderWidgetHostImpl;
  40 class RenderWidgetHostViewMac;
  41 class RenderWidgetHostViewMacEditCommandHelper;
  42 class WebContents;
  43 }
  44
  45 namespace ui {
  46 class Compositor;
  47 class Layer;
  48 }
  49
  50 @class FullscreenWindowManager;
  51 @protocol RenderWidgetHostViewMacDelegate;
  52
  53 @protocol RenderWidgetHostViewMacOwner
  54 - (content::RenderWidgetHostViewMac*)renderWidgetHostViewMac;
  55 @end
  56
  57 // This is the view that lives in the Cocoa view hierarchy. In Windows-land,
  58 // RenderWidgetHostViewWin is both the view and the delegate. We split the roles
  59 // but that means that the view needs to own the delegate and will dispose of it
  60 // when it's removed from the view system.
  61 @interface RenderWidgetHostViewCocoa
  62     : ToolTipBaseView<RenderWidgetHostViewMacBase,
  63                       RenderWidgetHostViewMacOwner,
  64                       NSTextInputClient> {
  65  @private
  66   scoped_ptr<content::RenderWidgetHostViewMac> renderWidgetHostView_;
  67   // This ivar is the cocoa delegate of the NSResponder.
  68   base::scoped_nsobject<NSObject<RenderWidgetHostViewMacDelegate>>
  69       responderDelegate_;
  70   BOOL canBeKeyView_;
  71   BOOL closeOnDeactivate_;
  72   BOOL opaque_;
  73   scoped_ptr<content::RenderWidgetHostViewMacEditCommandHelper>
  74       editCommand_helper_;
  75
  76   // Is YES if there was a mouse-down as yet unbalanced with a mouse-up.
  77   BOOL hasOpenMouseDown_;
  78
  79   NSWindow* lastWindow_;  // weak
  80
  81   // The cursor for the page. This is passed up from the renderer.
  82   base::scoped_nsobject<NSCursor> currentCursor_;
  83
  84   // Variables used by our implementaion of the NSTextInput protocol.
  85   // An input method of Mac calls the methods of this protocol not only to
  86   // notify an application of its status, but also to retrieve the status of
  87   // the application. That is, an application cannot control an input method
  88   // directly.
  89   // This object keeps the status of a composition of the renderer and returns
  90   // it when an input method asks for it.
  91   // We need to implement Objective-C methods for the NSTextInput protocol. On
  92   // the other hand, we need to implement a C++ method for an IPC-message
  93   // handler which receives input-method events from the renderer.
  94
  95   // Represents the input-method attributes supported by this object.
  96   base::scoped_nsobject<NSArray> validAttributesForMarkedText_;
  97
  98   // Indicates if we are currently handling a key down event.
  99   BOOL handlingKeyDown_;
 100
 101   // Indicates if there is any marked text.
 102   BOOL hasMarkedText_;
 103
 104   // Indicates if unmarkText is called or not when handling a keyboard
 105   // event.
 106   BOOL unmarkTextCalled_;
 107
 108   // The range of current marked text inside the whole content of the DOM node
 109   // being edited.
 110   // TODO(suzhe): This is currently a fake value, as we do not support accessing
 111   // the whole content yet.
 112   NSRange markedRange_;
 113
 114   // The selected range, cached from a message sent by the renderer.
 115   NSRange selectedRange_;
 116
 117   // Text to be inserted which was generated by handling a key down event.
 118   base::string16 textToBeInserted_;
 119
 120   // Marked text which was generated by handling a key down event.
 121   base::string16 markedText_;
 122
 123   // Underline information of the |markedText_|.
 124   std::vector<blink::WebCompositionUnderline> underlines_;
 125
 126   // Indicates if doCommandBySelector method receives any edit command when
 127   // handling a key down event.
 128   BOOL hasEditCommands_;
 129
 130   // Contains edit commands received by the -doCommandBySelector: method when
 131   // handling a key down event, not including inserting commands, eg. insertTab,
 132   // etc.
 133   content::EditCommands editCommands_;
 134
 135   // The plugin that currently has focus (-1 if no plugin has focus).
 136   int focusedPluginIdentifier_;
 137
 138   // Whether or not plugin IME is currently enabled active.
 139   BOOL pluginImeActive_;
 140
 141   // Whether the previous mouse event was ignored due to hitTest check.
 142   BOOL mouseEventWasIgnored_;
 143
 144   // Event monitor for scroll wheel end event.
 145   id endWheelMonitor_;
 146
 147   // When a gesture starts, the system does not inform the view of which type
 148   // of gesture is happening (magnify, rotate, etc), rather, it just informs
 149   // the view that some as-yet-undefined gesture is starting. Capture the
 150   // information about the gesture's beginning event here. It will be used to
 151   // create a specific gesture begin event later.
 152   scoped_ptr<blink::WebGestureEvent> gestureBeginEvent_;
 153
 154   // To avoid accidental pinches, require that a certain zoom threshold be
 155   // reached before forwarding it to the browser. Use |pinchUnusedAmount_| to
 156   // hold this value. If the user reaches this value, don't re-require the
 157   // threshold be reached until the page has been zoomed back to page scale of
 158   // one.
 159   bool pinchHasReachedZoomThreshold_;
 160   float pinchUnusedAmount_;
 161   NSTimeInterval pinchLastGestureTimestamp_;
 162
 163   // This is set if a GesturePinchBegin event has been sent in the lifetime of
 164   // |gestureBeginEvent_|. If set, a GesturePinchEnd will be sent when the
 165   // gesture ends.
 166   BOOL gestureBeginPinchSent_;
 167
 168   // If true then escape key down events are suppressed until the first escape
 169   // key up event. (The up event is suppressed as well). This is used by the
 170   // flash fullscreen code to avoid sending a key up event without a matching
 171   // key down event.
 172   BOOL suppressNextEscapeKeyUp_;
 173
 174   // The set of key codes from key down events that we haven't seen the matching
 175   // key up events yet.
 176   // Used for filtering out non-matching NSKeyUp events.
 177   std::set<unsigned short> keyDownCodes_;
 178
 179   // The filter used to guide touch events towards a horizontal or vertical
 180   // orientation.
 181   content::MouseWheelRailsFilterMac mouseWheelFilter_;
 182 }
 183
 184 @property(nonatomic, readonly) NSRange selectedRange;
 185 @property(nonatomic, readonly) BOOL suppressNextEscapeKeyUp;
 186
 187 - (void)setCanBeKeyView:(BOOL)can;
 188 - (void)setCloseOnDeactivate:(BOOL)b;
 189 - (void)setOpaque:(BOOL)opaque;
 190 // True for always-on-top special windows (e.g. Balloons and Panels).
 191 - (BOOL)acceptsMouseEventsWhenInactive;
 192 // Cancel ongoing composition (abandon the marked text).
 193 - (void)cancelComposition;
 194 // Confirm ongoing composition.
 195 - (void)confirmComposition;
 196 // Enables or disables plugin IME.
 197 - (void)setPluginImeActive:(BOOL)active;
 198 // Updates the current plugin focus state.
 199 - (void)pluginFocusChanged:(BOOL)focused forPlugin:(int)pluginId;
 200 // Evaluates the event in the context of plugin IME, if plugin IME is enabled.
 201 // Returns YES if the event was handled.
 202 - (BOOL)postProcessEventForPluginIme:(NSEvent*)event;
 203 - (void)updateCursor:(NSCursor*)cursor;
 204 - (NSRect)firstViewRectForCharacterRange:(NSRange)theRange
 205                              actualRange:(NSRangePointer)actualRange;
 206 @end
 207
 208 namespace content {
 209
 210 ///////////////////////////////////////////////////////////////////////////////
 211 // RenderWidgetHostViewMac
 212 //
 213 //  An object representing the "View" of a rendered web page. This object is
 214 //  responsible for displaying the content of the web page, and integrating with
 215 //  the Cocoa view system. It is the implementation of the RenderWidgetHostView
 216 //  that the cross-platform RenderWidgetHost object uses
 217 //  to display the data.
 218 //
 219 //  Comment excerpted from render_widget_host.h:
 220 //
 221 //    "The lifetime of the RenderWidgetHost* is tied to the render process.
 222 //     If the render process dies, the RenderWidgetHost* goes away and all
 223 //     references to it must become NULL."
 224 //
 225 // RenderWidgetHostView class hierarchy described in render_widget_host_view.h.
 226 class CONTENT_EXPORT RenderWidgetHostViewMac
 227     : public RenderWidgetHostViewBase,
 228       public DelegatedFrameHostClient,
 229       public ui::AcceleratedWidgetMacNSView,
 230       public IPC::Sender,
 231       public gfx::DisplayObserver {
 232  public:
 233   // The view will associate itself with the given widget. The native view must
 234   // be hooked up immediately to the view hierarchy, or else when it is
 235   // deleted it will delete this out from under the caller.
 236   //
 237   // When |is_guest_view_hack| is true, this view isn't really the view for
 238   // the |widget|, a RenderWidgetHostViewGuest is.
 239   // TODO(lazyboy): Remove |is_guest_view_hack| once BrowserPlugin has migrated
 240   // to use RWHVChildFrame (http://crbug.com/330264).
 241   RenderWidgetHostViewMac(RenderWidgetHost* widget, bool is_guest_view_hack);
 242   ~RenderWidgetHostViewMac() override;
 243
 244   RenderWidgetHostViewCocoa* cocoa_view() const { return cocoa_view_; }
 245
 246   // |delegate| is used to separate out the logic from the NSResponder delegate.
 247   // |delegate| is retained by this class.
 248   // |delegate| should be set at most once.
 249   CONTENT_EXPORT void SetDelegate(
 250     NSObject<RenderWidgetHostViewMacDelegate>* delegate);
 251   void SetAllowPauseForResizeOrRepaint(bool allow);
 252
 253   // RenderWidgetHostView implementation.
 254   bool OnMessageReceived(const IPC::Message& msg) override;
 255   void InitAsChild(gfx::NativeView parent_view) override;
 256   RenderWidgetHost* GetRenderWidgetHost() const override;
 257   void SetSize(const gfx::Size& size) override;
 258   void SetBounds(const gfx::Rect& rect) override;
 259   gfx::Vector2dF GetLastScrollOffset() const override;
 260   gfx::NativeView GetNativeView() const override;
 261   gfx::NativeViewId GetNativeViewId() const override;
 262   gfx::NativeViewAccessible GetNativeViewAccessible() override;
 263   bool HasFocus() const override;
 264   bool IsSurfaceAvailableForCopy() const override;
 265   void Show() override;
 266   void Hide() override;
 267   bool IsShowing() override;
 268   void WasUnOccluded() override;
 269   void WasOccluded() override;
 270   gfx::Rect GetViewBounds() const override;
 271   void SetShowingContextMenu(bool showing) override;
 272   void SetActive(bool active) override;
 273   void SetWindowVisibility(bool visible) override;
 274   void WindowFrameChanged() override;
 275   void ShowDefinitionForSelection() override;
 276   bool SupportsSpeech() const override;
 277   void SpeakSelection() override;
 278   bool IsSpeaking() const override;
 279   void StopSpeaking() override;
 280   void SetBackgroundColor(SkColor color) override;
 281
 282   // Implementation of RenderWidgetHostViewBase.
 283   void InitAsPopup(RenderWidgetHostView* parent_host_view,
 284                    const gfx::Rect& pos) override;
 285   void InitAsFullscreen(RenderWidgetHostView* reference_host_view) override;
 286   void MovePluginWindows(const std::vector<WebPluginGeometry>& moves) override;
 287   void Focus() override;
 288   void UpdateCursor(const WebCursor& cursor) override;
 289   void SetIsLoading(bool is_loading) override;
 290   void TextInputTypeChanged(ui::TextInputType type,
 291                             ui::TextInputMode input_mode,
 292                             bool can_compose_inline,
 293                             int flags) override;
 294   void ImeCancelComposition() override;
 295   void ImeCompositionRangeChanged(
 296       const gfx::Range& range,
 297       const std::vector<gfx::Rect>& character_bounds) override;
 298   void RenderProcessGone(base::TerminationStatus status,
 299                          int error_code) override;
 300   void RenderWidgetHostGone() override;
 301   void Destroy() override;
 302   void SetTooltipText(const base::string16& tooltip_text) override;
 303   void SelectionChanged(const base::string16& text,
 304                         size_t offset,
 305                         const gfx::Range& range) override;
 306   void SelectionBoundsChanged(
 307       const ViewHostMsg_SelectionBounds_Params& params) override;
 308   void CopyFromCompositingSurface(const gfx::Rect& src_subrect,
 309                                   const gfx::Size& dst_size,
 310                                   ReadbackRequestCallback& callback,
 311                                   SkColorType preferred_color_type) override;
 312   void CopyFromCompositingSurfaceToVideoFrame(
 313       const gfx::Rect& src_subrect,
 314       const scoped_refptr<media::VideoFrame>& target,
 315       const base::Callback<void(bool)>& callback) override;
 316   bool CanCopyToVideoFrame() const override;
 317   bool CanSubscribeFrame() const override;
 318   void BeginFrameSubscription(
 319       scoped_ptr<RenderWidgetHostViewFrameSubscriber> subscriber) override;
 320   void EndFrameSubscription() override;
 321   void OnSwapCompositorFrame(uint32 output_surface_id,
 322                              scoped_ptr<cc::CompositorFrame> frame) override;
 323   BrowserAccessibilityManager* CreateBrowserAccessibilityManager(
 324       BrowserAccessibilityDelegate* delegate) override;
 325   gfx::Point AccessibilityOriginInScreen(const gfx::Rect& bounds) override;
 326   bool PostProcessEventForPluginIme(
 327       const NativeWebKeyboardEvent& event) override;
 328
 329   bool HasAcceleratedSurface(const gfx::Size& desired_size) override;
 330   void GetScreenInfo(blink::WebScreenInfo* results) override;
 331   gfx::Rect GetBoundsInRootWindow() override;
 332   gfx::GLSurfaceHandle GetCompositingSurface() override;
 333
 334   bool LockMouse() override;
 335   void UnlockMouse() override;
 336   void WheelEventAck(const blink::WebMouseWheelEvent& event,
 337                      InputEventAckState ack_result) override;
 338
 339   uint32_t GetSurfaceIdNamespace() override;
 340
 341   // IPC::Sender implementation.
 342   bool Send(IPC::Message* message) override;
 343
 344   // gfx::DisplayObserver implementation.
 345   void OnDisplayAdded(const gfx::Display& new_display) override;
 346   void OnDisplayRemoved(const gfx::Display& old_display) override;
 347   void OnDisplayMetricsChanged(const gfx::Display& display,
 348                                uint32_t metrics) override;
 349
 350   // Forwards the mouse event to the renderer.
 351   void ForwardMouseEvent(const blink::WebMouseEvent& event);
 352
 353   void KillSelf();
 354
 355   void SetTextInputActive(bool active);
 356
 357   // Sends completed plugin IME notification and text back to the renderer.
 358   void PluginImeCompositionCompleted(const base::string16& text, int plugin_id);
 359
 360   const std::string& selected_text() const { return selected_text_; }
 361
 362   // Returns true and stores first rectangle for character range if the
 363   // requested |range| is already cached, otherwise returns false.
 364   // Exposed for testing.
 365   CONTENT_EXPORT bool GetCachedFirstRectForCharacterRange(
 366       NSRange range, NSRect* rect, NSRange* actual_range);
 367
 368   // Returns true if there is line break in |range| and stores line breaking
 369   // point to |line_breaking_point|. The |line_break_point| is valid only if
 370   // this function returns true.
 371   bool GetLineBreakIndex(const std::vector<gfx::Rect>& bounds,
 372                          const gfx::Range& range,
 373                          size_t* line_break_point);
 374
 375   // Returns composition character boundary rectangle. The |range| is
 376   // composition based range. Also stores |actual_range| which is corresponding
 377   // to actually used range for returned rectangle.
 378   gfx::Rect GetFirstRectForCompositionRange(const gfx::Range& range,
 379                                             gfx::Range* actual_range);
 380
 381   // Converts from given whole character range to composition oriented range. If
 382   // the conversion failed, return gfx::Range::InvalidRange.
 383   gfx::Range ConvertCharacterRangeToCompositionRange(
 384       const gfx::Range& request_range);
 385
 386   WebContents* GetWebContents();
 387
 388   // These member variables should be private, but the associated ObjC class
 389   // needs access to them and can't be made a friend.
 390
 391   // The associated Model.  Can be NULL if Destroy() is called when
 392   // someone (other than superview) has retained |cocoa_view_|.
 393   RenderWidgetHostImpl* render_widget_host_;
 394
 395   // Current text input type.
 396   ui::TextInputType text_input_type_;
 397   bool can_compose_inline_;
 398
 399   // The background CoreAnimation layer which is hosted by |cocoa_view_|.
 400   base::scoped_nsobject<CALayer> background_layer_;
 401
 402   // The state of |delegated_frame_host_| and |browser_compositor_| to
 403   // manage being visible, hidden, or occluded.
 404   enum BrowserCompositorViewState {
 405     // Effects:
 406     // - |browser_compositor_| exists and |delegated_frame_host_| is
 407     //    visible.
 408     // Happens when:
 409     // - |render_widet_host_| is in the visible state (this includes when
 410     //   the tab isn't visible, but tab capture is enabled).
 411     BrowserCompositorActive,
 412     // Effects:
 413     // - |browser_compositor_| exists, but |delegated_frame_host_| has
 414     //   been hidden.
 415     // Happens when:
 416     // - The |render_widget_host_| is hidden, but |cocoa_view_| is still in the
 417     //   NSWindow hierarchy.
 418     // - This happens when |cocoa_view_| is hidden (minimized, on another
 419     //   occluded by other windows, etc). The |browser_compositor_| and
 420     //   its CALayers are kept around so that we will have content to show when
 421     //   we are un-occluded.
 422     BrowserCompositorSuspended,
 423     // Effects:
 424     // - |browser_compositor_| has been destroyed and
 425     //   |delegated_frame_host_| has been hidden.
 426     // Happens when:
 427     // - The |render_widget_host_| is hidden or dead, and |cocoa_view_| is not
 428     //   attached to a NSWindow.
 429     // - This happens for backgrounded tabs.
 430     BrowserCompositorDestroyed,
 431   };
 432   BrowserCompositorViewState browser_compositor_state_;
 433
 434   // Delegated frame management and compositor.
 435   scoped_ptr<DelegatedFrameHost> delegated_frame_host_;
 436   scoped_ptr<ui::Layer> root_layer_;
 437
 438   // Container for ui::Compositor the CALayer tree drawn by it.
 439   scoped_ptr<BrowserCompositorMac> browser_compositor_;
 440
 441   // Placeholder that is allocated while browser_compositor_ is NULL,
 442   // indicating that a BrowserCompositorViewMac may be allocated. This is to
 443   // help in recycling the internals of BrowserCompositorViewMac.
 444   scoped_ptr<BrowserCompositorMacPlaceholder>
 445       browser_compositor_placeholder_;
 446
 447   // Set when the currently-displayed frame is the minimum scale. Used to
 448   // determine if pinch gestures need to be thresholded.
 449   bool page_at_minimum_scale_;
 450
 451   NSWindow* pepper_fullscreen_window() const {
 452     return pepper_fullscreen_window_;
 453   }
 454
 455   CONTENT_EXPORT void release_pepper_fullscreen_window_for_testing();
 456
 457   RenderWidgetHostViewMac* fullscreen_parent_host_view() const {
 458     return fullscreen_parent_host_view_;
 459   }
 460
 461   int window_number() const;
 462
 463   // The scale factor for the screen that the view is currently on.
 464   float ViewScaleFactor() const;
 465
 466   // Update the scale factor for the backing store and for any CALayers.
 467   void UpdateBackingStoreScaleFactor();
 468
 469   // Ensure that the display link is associated with the correct display.
 470   void UpdateDisplayLink();
 471
 472   void PauseForPendingResizeOrRepaintsAndDraw();
 473
 474   // DelegatedFrameHostClient implementation.
 475   ui::Layer* DelegatedFrameHostGetLayer() const override;
 476   bool DelegatedFrameHostIsVisible() const override;
 477   gfx::Size DelegatedFrameHostDesiredSizeInDIP() const override;
 478   bool DelegatedFrameCanCreateResizeLock() const override;
 479   scoped_ptr<ResizeLock> DelegatedFrameHostCreateResizeLock(
 480       bool defer_compositor_lock) override;
 481   void DelegatedFrameHostResizeLockWasReleased() override;
 482   void DelegatedFrameHostSendCompositorSwapAck(
 483       int output_surface_id,
 484       const cc::CompositorFrameAck& ack) override;
 485   void DelegatedFrameHostSendReclaimCompositorResources(
 486       int output_surface_id,
 487       const cc::CompositorFrameAck& ack) override;
 488   void DelegatedFrameHostOnLostCompositorResources() override;
 489   void DelegatedFrameHostUpdateVSyncParameters(
 490       const base::TimeTicks& timebase,
 491       const base::TimeDelta& interval) override;
 492
 493   // AcceleratedWidgetMacNSView implementation.
 494   NSView* AcceleratedWidgetGetNSView() const override;
 495   bool AcceleratedWidgetShouldIgnoreBackpressure() const override;
 496   void AcceleratedWidgetSwapCompleted(
 497       const std::vector<ui::LatencyInfo>& latency_info) override;
 498   void AcceleratedWidgetHitError() override;
 499
 500   // Transition from being in the Suspended state to being in the Destroyed
 501   // state, if appropriate (see BrowserCompositorViewState for details).
 502   void DestroySuspendedBrowserCompositorViewIfNeeded();
 503
 504  private:
 505   friend class RenderWidgetHostViewMacTest;
 506
 507   // Returns whether this render view is a popup (autocomplete window).
 508   bool IsPopup() const;
 509
 510   // Shuts down the render_widget_host_.  This is a separate function so we can
 511   // invoke it from the message loop.
 512   void ShutdownHost();
 513
 514   // Tear down all components of the browser compositor in an order that will
 515   // ensure no dangling references.
 516   void ShutdownBrowserCompositor();
 517
 518   // The state of the the browser compositor and delegated frame host. See
 519   // BrowserCompositorViewState for details.
 520   void EnsureBrowserCompositorView();
 521   void SuspendBrowserCompositorView();
 522   void DestroyBrowserCompositorView();
 523
 524   // IPC message handlers.
 525   void OnPluginFocusChanged(bool focused, int plugin_id);
 526   void OnStartPluginIme();
 527   void OnGetRenderedTextCompleted(const std::string& text);
 528
 529   // Send updated vsync parameters to the renderer.
 530   void SendVSyncParametersToRenderer();
 531
 532   // Dispatches a TTS session.
 533   void SpeakText(const std::string& text);
 534
 535   // The associated view. This is weak and is inserted into the view hierarchy
 536   // to own this RenderWidgetHostViewMac object. Set to nil at the start of the
 537   // destructor.
 538   RenderWidgetHostViewCocoa* cocoa_view_;
 539
 540   // Indicates if the page is loading.
 541   bool is_loading_;
 542
 543   // Whether it's allowed to pause waiting for a new frame.
 544   bool allow_pause_for_resize_or_repaint_;
 545
 546   // The last scroll offset of the view.
 547   gfx::Vector2dF last_scroll_offset_;
 548
 549   // The text to be shown in the tooltip, supplied by the renderer.
 550   base::string16 tooltip_text_;
 551
 552   // True when this view acts as a platform view hack for a
 553   // RenderWidgetHostViewGuest.
 554   bool is_guest_view_hack_;
 555
 556   // selected text on the renderer.
 557   std::string selected_text_;
 558
 559   // The window used for popup widgets.
 560   base::scoped_nsobject<NSWindow> popup_window_;
 561
 562   // The fullscreen window used for pepper flash.
 563   base::scoped_nsobject<NSWindow> pepper_fullscreen_window_;
 564   base::scoped_nsobject<FullscreenWindowManager> fullscreen_window_manager_;
 565   // Our parent host view, if this is fullscreen.  NULL otherwise.
 566   RenderWidgetHostViewMac* fullscreen_parent_host_view_;
 567
 568   // Display link for getting vsync info.
 569   scoped_refptr<ui::DisplayLinkMac> display_link_;
 570
 571   // The current VSync timebase and interval. This is zero until the first call
 572   // to SendVSyncParametersToRenderer(), and refreshed regularly thereafter.
 573   base::TimeTicks vsync_timebase_;
 574   base::TimeDelta vsync_interval_;
 575
 576   // The current composition character range and its bounds.
 577   gfx::Range composition_range_;
 578   std::vector<gfx::Rect> composition_bounds_;
 579
 580   // The current caret bounds.
 581   gfx::Rect caret_rect_;
 582
 583   // Factory used to safely scope delayed calls to ShutdownHost().
 584   base::WeakPtrFactory<RenderWidgetHostViewMac> weak_factory_;
 585
 586   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewMac);
 587 };
 588
 589 }  // namespace content
 590
 591 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MAC_H_