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/display_link_mac.h"
  24 #include "content/browser/renderer_host/input/mouse_wheel_rails_filter_mac.h"
  25 #include "content/browser/renderer_host/render_widget_host_view_base.h"
  26 #include "content/common/content_export.h"
  27 #include "content/common/cursors/webcursor.h"
  28 #include "content/common/edit_command.h"
  29 #import "content/public/browser/render_widget_host_view_mac_base.h"
  30 #include "ipc/ipc_sender.h"
  31 #include "third_party/WebKit/public/web/WebCompositionUnderline.h"
  32 #include "ui/accelerated_widget_mac/accelerated_widget_mac.h"
  33 #include "ui/accelerated_widget_mac/io_surface_layer.h"
  34 #include "ui/base/cocoa/base_view.h"
  35 #include "ui/base/cocoa/remote_layer_api.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 @class ToolTip;
  53
  54 @protocol RenderWidgetHostViewMacOwner
  55 - (content::RenderWidgetHostViewMac*)renderWidgetHostViewMac;
  56 @end
  57
  58 // This is the view that lives in the Cocoa view hierarchy. In Windows-land,
  59 // RenderWidgetHostViewWin is both the view and the delegate. We split the roles
  60 // but that means that the view needs to own the delegate and will dispose of it
  61 // when it's removed from the view system.
  62 @interface RenderWidgetHostViewCocoa
  63     : BaseView <RenderWidgetHostViewMacBase,
  64                 RenderWidgetHostViewMacOwner,
  65                 NSTextInputClient> {
  66  @private
  67   scoped_ptr<content::RenderWidgetHostViewMac> renderWidgetHostView_;
  68   // This ivar is the cocoa delegate of the NSResponder.
  69   base::scoped_nsobject<NSObject<RenderWidgetHostViewMacDelegate>>
  70       responderDelegate_;
  71   BOOL canBeKeyView_;
  72   BOOL closeOnDeactivate_;
  73   BOOL opaque_;
  74   scoped_ptr<content::RenderWidgetHostViewMacEditCommandHelper>
  75       editCommand_helper_;
  76
  77   // These are part of the magic tooltip code from WebKit's WebHTMLView:
  78   id trackingRectOwner_;              // (not retained)
  79   void* trackingRectUserData_;
  80   NSTrackingRectTag lastToolTipTag_;
  81   base::scoped_nsobject<NSString> toolTip_;
  82
  83   // Is YES if there was a mouse-down as yet unbalanced with a mouse-up.
  84   BOOL hasOpenMouseDown_;
  85
  86   NSWindow* lastWindow_;  // weak
  87
  88   // The cursor for the page. This is passed up from the renderer.
  89   base::scoped_nsobject<NSCursor> currentCursor_;
  90
  91   // Variables used by our implementaion of the NSTextInput protocol.
  92   // An input method of Mac calls the methods of this protocol not only to
  93   // notify an application of its status, but also to retrieve the status of
  94   // the application. That is, an application cannot control an input method
  95   // directly.
  96   // This object keeps the status of a composition of the renderer and returns
  97   // it when an input method asks for it.
  98   // We need to implement Objective-C methods for the NSTextInput protocol. On
  99   // the other hand, we need to implement a C++ method for an IPC-message
 100   // handler which receives input-method events from the renderer.
 101
 102   // Represents the input-method attributes supported by this object.
 103   base::scoped_nsobject<NSArray> validAttributesForMarkedText_;
 104
 105   // Indicates if we are currently handling a key down event.
 106   BOOL handlingKeyDown_;
 107
 108   // Indicates if there is any marked text.
 109   BOOL hasMarkedText_;
 110
 111   // Indicates if unmarkText is called or not when handling a keyboard
 112   // event.
 113   BOOL unmarkTextCalled_;
 114
 115   // The range of current marked text inside the whole content of the DOM node
 116   // being edited.
 117   // TODO(suzhe): This is currently a fake value, as we do not support accessing
 118   // the whole content yet.
 119   NSRange markedRange_;
 120
 121   // The selected range, cached from a message sent by the renderer.
 122   NSRange selectedRange_;
 123
 124   // Text to be inserted which was generated by handling a key down event.
 125   base::string16 textToBeInserted_;
 126
 127   // Marked text which was generated by handling a key down event.
 128   base::string16 markedText_;
 129
 130   // Underline information of the |markedText_|.
 131   std::vector<blink::WebCompositionUnderline> underlines_;
 132
 133   // Indicates if doCommandBySelector method receives any edit command when
 134   // handling a key down event.
 135   BOOL hasEditCommands_;
 136
 137   // Contains edit commands received by the -doCommandBySelector: method when
 138   // handling a key down event, not including inserting commands, eg. insertTab,
 139   // etc.
 140   content::EditCommands editCommands_;
 141
 142   // The plugin that currently has focus (-1 if no plugin has focus).
 143   int focusedPluginIdentifier_;
 144
 145   // Whether or not plugin IME is currently enabled active.
 146   BOOL pluginImeActive_;
 147
 148   // Whether the previous mouse event was ignored due to hitTest check.
 149   BOOL mouseEventWasIgnored_;
 150
 151   // Event monitor for scroll wheel end event.
 152   id endWheelMonitor_;
 153
 154   // When a gesture starts, the system does not inform the view of which type
 155   // of gesture is happening (magnify, rotate, etc), rather, it just informs
 156   // the view that some as-yet-undefined gesture is starting. Capture the
 157   // information about the gesture's beginning event here. It will be used to
 158   // create a specific gesture begin event later.
 159   scoped_ptr<blink::WebGestureEvent> gestureBeginEvent_;
 160
 161   // To avoid accidental pinches, require that a certain zoom threshold be
 162   // reached before forwarding it to the browser. Use |unusedPinchAmount_| to
 163   // hold this value. If the user reaches this value, don't re-require the
 164   // threshold be reached until a certain time has passed since the last
 165   // zoom. Store the time of the last zoom in |lastUsedPinchEventTimestamp_|.
 166   float unusedPinchAmount_;
 167   NSTimeInterval lastUsedPinchEventTimestamp_;
 168
 169   // This is set if a GesturePinchBegin event has been sent in the lifetime of
 170   // |gestureBeginEvent_|. If set, a GesturePinchEnd will be sent when the
 171   // gesture ends.
 172   BOOL gestureBeginPinchSent_;
 173
 174   // If true then escape key down events are suppressed until the first escape
 175   // key up event. (The up event is suppressed as well). This is used by the
 176   // flash fullscreen code to avoid sending a key up event without a matching
 177   // key down event.
 178   BOOL suppressNextEscapeKeyUp_;
 179
 180   // The set of key codes from key down events that we haven't seen the matching
 181   // key up events yet.
 182   // Used for filtering out non-matching NSKeyUp events.
 183   std::set<unsigned short> keyDownCodes_;
 184
 185   // The filter used to guide touch events towards a horizontal or vertical
 186   // orientation.
 187   content::MouseWheelRailsFilterMac mouseWheelFilter_;
 188 }
 189
 190 @property(nonatomic, readonly) NSRange selectedRange;
 191 @property(nonatomic, readonly) BOOL suppressNextEscapeKeyUp;
 192
 193 - (void)setCanBeKeyView:(BOOL)can;
 194 - (void)setCloseOnDeactivate:(BOOL)b;
 195 - (void)setOpaque:(BOOL)opaque;
 196 - (void)setToolTipAtMousePoint:(NSString *)string;
 197 // True for always-on-top special windows (e.g. Balloons and Panels).
 198 - (BOOL)acceptsMouseEventsWhenInactive;
 199 // Cancel ongoing composition (abandon the marked text).
 200 - (void)cancelComposition;
 201 // Confirm ongoing composition.
 202 - (void)confirmComposition;
 203 // Enables or disables plugin IME.
 204 - (void)setPluginImeActive:(BOOL)active;
 205 // Updates the current plugin focus state.
 206 - (void)pluginFocusChanged:(BOOL)focused forPlugin:(int)pluginId;
 207 // Evaluates the event in the context of plugin IME, if plugin IME is enabled.
 208 // Returns YES if the event was handled.
 209 - (BOOL)postProcessEventForPluginIme:(NSEvent*)event;
 210 - (void)updateCursor:(NSCursor*)cursor;
 211 - (NSRect)firstViewRectForCharacterRange:(NSRange)theRange
 212                              actualRange:(NSRangePointer)actualRange;
 213 @end
 214
 215 namespace content {
 216
 217 ///////////////////////////////////////////////////////////////////////////////
 218 // RenderWidgetHostViewMac
 219 //
 220 //  An object representing the "View" of a rendered web page. This object is
 221 //  responsible for displaying the content of the web page, and integrating with
 222 //  the Cocoa view system. It is the implementation of the RenderWidgetHostView
 223 //  that the cross-platform RenderWidgetHost object uses
 224 //  to display the data.
 225 //
 226 //  Comment excerpted from render_widget_host.h:
 227 //
 228 //    "The lifetime of the RenderWidgetHost* is tied to the render process.
 229 //     If the render process dies, the RenderWidgetHost* goes away and all
 230 //     references to it must become NULL."
 231 //
 232 // RenderWidgetHostView class hierarchy described in render_widget_host_view.h.
 233 class CONTENT_EXPORT RenderWidgetHostViewMac
 234     : public RenderWidgetHostViewBase,
 235       public DelegatedFrameHostClient,
 236       public ui::AcceleratedWidgetMacNSView,
 237       public IPC::Sender,
 238       public gfx::DisplayObserver {
 239  public:
 240   // The view will associate itself with the given widget. The native view must
 241   // be hooked up immediately to the view hierarchy, or else when it is
 242   // deleted it will delete this out from under the caller.
 243   //
 244   // When |is_guest_view_hack| is true, this view isn't really the view for
 245   // the |widget|, a RenderWidgetHostViewGuest is.
 246   // TODO(lazyboy): Remove |is_guest_view_hack| once BrowserPlugin has migrated
 247   // to use RWHVChildFrame (http://crbug.com/330264).
 248   RenderWidgetHostViewMac(RenderWidgetHost* widget, bool is_guest_view_hack);
 249   ~RenderWidgetHostViewMac() override;
 250
 251   RenderWidgetHostViewCocoa* cocoa_view() const { return cocoa_view_; }
 252
 253   // |delegate| is used to separate out the logic from the NSResponder delegate.
 254   // |delegate| is retained by this class.
 255   // |delegate| should be set at most once.
 256   CONTENT_EXPORT void SetDelegate(
 257     NSObject<RenderWidgetHostViewMacDelegate>* delegate);
 258   void SetAllowPauseForResizeOrRepaint(bool allow);
 259
 260   // RenderWidgetHostView implementation.
 261   bool OnMessageReceived(const IPC::Message& msg) override;
 262   void InitAsChild(gfx::NativeView parent_view) override;
 263   RenderWidgetHost* GetRenderWidgetHost() const override;
 264   void SetSize(const gfx::Size& size) override;
 265   void SetBounds(const gfx::Rect& rect) override;
 266   gfx::Vector2dF GetLastScrollOffset() const override;
 267   gfx::NativeView GetNativeView() const override;
 268   gfx::NativeViewId GetNativeViewId() const override;
 269   gfx::NativeViewAccessible GetNativeViewAccessible() override;
 270   bool HasFocus() const override;
 271   bool IsSurfaceAvailableForCopy() const override;
 272   void Show() override;
 273   void Hide() override;
 274   bool IsShowing() override;
 275   void WasUnOccluded() override;
 276   void WasOccluded() override;
 277   gfx::Rect GetViewBounds() const override;
 278   void SetShowingContextMenu(bool showing) override;
 279   void SetActive(bool active) override;
 280   void SetWindowVisibility(bool visible) override;
 281   void WindowFrameChanged() override;
 282   void ShowDefinitionForSelection() override;
 283   bool SupportsSpeech() const override;
 284   void SpeakSelection() override;
 285   bool IsSpeaking() const override;
 286   void StopSpeaking() override;
 287   void SetBackgroundColor(SkColor color) override;
 288
 289   // Implementation of RenderWidgetHostViewBase.
 290   void InitAsPopup(RenderWidgetHostView* parent_host_view,
 291                    const gfx::Rect& pos) override;
 292   void InitAsFullscreen(RenderWidgetHostView* reference_host_view) override;
 293   void MovePluginWindows(const std::vector<WebPluginGeometry>& moves) override;
 294   void Focus() override;
 295   void Blur() override;
 296   void UpdateCursor(const WebCursor& cursor) override;
 297   void SetIsLoading(bool is_loading) override;
 298   void TextInputTypeChanged(ui::TextInputType type,
 299                             ui::TextInputMode input_mode,
 300                             bool can_compose_inline,
 301                             int flags) override;
 302   void ImeCancelComposition() override;
 303   void ImeCompositionRangeChanged(
 304       const gfx::Range& range,
 305       const std::vector<gfx::Rect>& character_bounds) override;
 306   void RenderProcessGone(base::TerminationStatus status,
 307                          int error_code) override;
 308   void RenderWidgetHostGone() override;
 309   void Destroy() override;
 310   void SetTooltipText(const base::string16& tooltip_text) override;
 311   void SelectionChanged(const base::string16& text,
 312                         size_t offset,
 313                         const gfx::Range& range) override;
 314   void SelectionBoundsChanged(
 315       const ViewHostMsg_SelectionBounds_Params& params) override;
 316   void CopyFromCompositingSurface(const gfx::Rect& src_subrect,
 317                                   const gfx::Size& dst_size,
 318                                   ReadbackRequestCallback& callback,
 319                                   SkColorType color_type) override;
 320   void CopyFromCompositingSurfaceToVideoFrame(
 321       const gfx::Rect& src_subrect,
 322       const scoped_refptr<media::VideoFrame>& target,
 323       const base::Callback<void(bool)>& callback) override;
 324   bool CanCopyToVideoFrame() const override;
 325   bool CanSubscribeFrame() const override;
 326   void BeginFrameSubscription(
 327       scoped_ptr<RenderWidgetHostViewFrameSubscriber> subscriber) override;
 328   void EndFrameSubscription() override;
 329   void OnSwapCompositorFrame(uint32 output_surface_id,
 330                              scoped_ptr<cc::CompositorFrame> frame) override;
 331   BrowserAccessibilityManager* CreateBrowserAccessibilityManager(
 332       BrowserAccessibilityDelegate* delegate) override;
 333   gfx::Point AccessibilityOriginInScreen(const gfx::Rect& bounds) override;
 334   void AccessibilityShowMenu(const gfx::Point& point) override;
 335   bool PostProcessEventForPluginIme(
 336       const NativeWebKeyboardEvent& event) override;
 337
 338   bool HasAcceleratedSurface(const gfx::Size& desired_size) override;
 339   void GetScreenInfo(blink::WebScreenInfo* results) override;
 340   gfx::Rect GetBoundsInRootWindow() override;
 341   gfx::GLSurfaceHandle GetCompositingSurface() override;
 342
 343   bool LockMouse() override;
 344   void UnlockMouse() override;
 345   void WheelEventAck(const blink::WebMouseWheelEvent& event,
 346                      InputEventAckState ack_result) override;
 347
 348   // IPC::Sender implementation.
 349   bool Send(IPC::Message* message) override;
 350
 351   SkColorType PreferredReadbackFormat() override;
 352
 353   // gfx::DisplayObserver implementation.
 354   void OnDisplayAdded(const gfx::Display& new_display) override;
 355   void OnDisplayRemoved(const gfx::Display& old_display) override;
 356   void OnDisplayMetricsChanged(const gfx::Display& display,
 357                                uint32_t metrics) override;
 358
 359   // Forwards the mouse event to the renderer.
 360   void ForwardMouseEvent(const blink::WebMouseEvent& event);
 361
 362   void KillSelf();
 363
 364   void SetTextInputActive(bool active);
 365
 366   // Sends completed plugin IME notification and text back to the renderer.
 367   void PluginImeCompositionCompleted(const base::string16& text, int plugin_id);
 368
 369   const std::string& selected_text() const { return selected_text_; }
 370
 371   // Returns true and stores first rectangle for character range if the
 372   // requested |range| is already cached, otherwise returns false.
 373   // Exposed for testing.
 374   CONTENT_EXPORT bool GetCachedFirstRectForCharacterRange(
 375       NSRange range, NSRect* rect, NSRange* actual_range);
 376
 377   // Returns true if there is line break in |range| and stores line breaking
 378   // point to |line_breaking_point|. The |line_break_point| is valid only if
 379   // this function returns true.
 380   bool GetLineBreakIndex(const std::vector<gfx::Rect>& bounds,
 381                          const gfx::Range& range,
 382                          size_t* line_break_point);
 383
 384   // Returns composition character boundary rectangle. The |range| is
 385   // composition based range. Also stores |actual_range| which is corresponding
 386   // to actually used range for returned rectangle.
 387   gfx::Rect GetFirstRectForCompositionRange(const gfx::Range& range,
 388                                             gfx::Range* actual_range);
 389
 390   // Converts from given whole character range to composition oriented range. If
 391   // the conversion failed, return gfx::Range::InvalidRange.
 392   gfx::Range ConvertCharacterRangeToCompositionRange(
 393       const gfx::Range& request_range);
 394
 395   WebContents* GetWebContents();
 396
 397   // These member variables should be private, but the associated ObjC class
 398   // needs access to them and can't be made a friend.
 399
 400   // The associated Model.  Can be NULL if Destroy() is called when
 401   // someone (other than superview) has retained |cocoa_view_|.
 402   RenderWidgetHostImpl* render_widget_host_;
 403
 404   // Current text input type.
 405   ui::TextInputType text_input_type_;
 406   bool can_compose_inline_;
 407
 408   // The background CoreAnimation layer which is hosted by |cocoa_view_|.
 409   base::scoped_nsobject<CALayer> background_layer_;
 410
 411   // The state of |delegated_frame_host_| and |browser_compositor_| to
 412   // manage being visible, hidden, or occluded.
 413   enum BrowserCompositorViewState {
 414     // Effects:
 415     // - |browser_compositor_| exists and |delegated_frame_host_| is
 416     //    visible.
 417     // Happens when:
 418     // - |render_widet_host_| is in the visible state (this includes when
 419     //   the tab isn't visible, but tab capture is enabled).
 420     BrowserCompositorActive,
 421     // Effects:
 422     // - |browser_compositor_| exists, but |delegated_frame_host_| has
 423     //   been hidden.
 424     // Happens when:
 425     // - The |render_widget_host_| is hidden, but |cocoa_view_| is still in the
 426     //   NSWindow hierarchy.
 427     // - This happens when |cocoa_view_| is hidden (minimized, on another
 428     //   occluded by other windows, etc). The |browser_compositor_| and
 429     //   its CALayers are kept around so that we will have content to show when
 430     //   we are un-occluded.
 431     BrowserCompositorSuspended,
 432     // Effects:
 433     // - |browser_compositor_| has been destroyed and
 434     //   |delegated_frame_host_| has been hidden.
 435     // Happens when:
 436     // - The |render_widget_host_| is hidden or dead, and |cocoa_view_| is not
 437     //   attached to a NSWindow.
 438     // - This happens for backgrounded tabs.
 439     BrowserCompositorDestroyed,
 440   };
 441   BrowserCompositorViewState browser_compositor_state_;
 442
 443   // Delegated frame management and compositior.
 444   scoped_ptr<DelegatedFrameHost> delegated_frame_host_;
 445   scoped_ptr<ui::Layer> root_layer_;
 446
 447   // Container for ui::Compositor the CALayer tree drawn by it.
 448   scoped_ptr<BrowserCompositorMac> browser_compositor_;
 449
 450   // Placeholder that is allocated while browser_compositor_ is NULL,
 451   // indicating that a BrowserCompositorViewMac may be allocated. This is to
 452   // help in recycling the internals of BrowserCompositorViewMac.
 453   scoped_ptr<BrowserCompositorMacPlaceholder>
 454       browser_compositor_placeholder_;
 455
 456   NSWindow* pepper_fullscreen_window() const {
 457     return pepper_fullscreen_window_;
 458   }
 459
 460   CONTENT_EXPORT void release_pepper_fullscreen_window_for_testing();
 461
 462   RenderWidgetHostViewMac* fullscreen_parent_host_view() const {
 463     return fullscreen_parent_host_view_;
 464   }
 465
 466   int window_number() const;
 467
 468   // The scale factor for the screen that the view is currently on.
 469   float ViewScaleFactor() const;
 470
 471   // Update the scale factor for the backing store and for any CALayers.
 472   void UpdateBackingStoreScaleFactor();
 473
 474   // Ensure that the display link is associated with the correct display.
 475   void UpdateDisplayLink();
 476
 477   void PauseForPendingResizeOrRepaintsAndDraw();
 478
 479   // DelegatedFrameHostClient implementation.
 480   ui::Layer* DelegatedFrameHostGetLayer() const override;
 481   bool DelegatedFrameHostIsVisible() const override;
 482   gfx::Size DelegatedFrameHostDesiredSizeInDIP() const override;
 483   bool DelegatedFrameCanCreateResizeLock() const override;
 484   scoped_ptr<ResizeLock> DelegatedFrameHostCreateResizeLock(
 485       bool defer_compositor_lock) override;
 486   void DelegatedFrameHostResizeLockWasReleased() override;
 487   void DelegatedFrameHostSendCompositorSwapAck(
 488       int output_surface_id,
 489       const cc::CompositorFrameAck& ack) override;
 490   void DelegatedFrameHostSendReclaimCompositorResources(
 491       int output_surface_id,
 492       const cc::CompositorFrameAck& ack) override;
 493   void DelegatedFrameHostOnLostCompositorResources() override;
 494   void DelegatedFrameHostUpdateVSyncParameters(
 495       const base::TimeTicks& timebase,
 496       const base::TimeDelta& interval) override;
 497
 498   // AcceleratedWidgetMacNSView implementation.
 499   NSView* AcceleratedWidgetGetNSView() const override;
 500   bool AcceleratedWidgetShouldIgnoreBackpressure() const override;
 501   void AcceleratedWidgetSwapCompleted(
 502       const std::vector<ui::LatencyInfo>& latency_info) override;
 503   void AcceleratedWidgetHitError() override;
 504
 505   // Transition from being in the Suspended state to being in the Destroyed
 506   // state, if appropriate (see BrowserCompositorViewState for details).
 507   void DestroySuspendedBrowserCompositorViewIfNeeded();
 508
 509  private:
 510   friend class RenderWidgetHostViewMacTest;
 511
 512   // Returns whether this render view is a popup (autocomplete window).
 513   bool IsPopup() const;
 514
 515   // Shuts down the render_widget_host_.  This is a separate function so we can
 516   // invoke it from the message loop.
 517   void ShutdownHost();
 518
 519   // Tear down all components of the browser compositor in an order that will
 520   // ensure no dangling references.
 521   void ShutdownBrowserCompositor();
 522
 523   // The state of the the browser compositor and delegated frame host. See
 524   // BrowserCompositorViewState for details.
 525   void EnsureBrowserCompositorView();
 526   void SuspendBrowserCompositorView();
 527   void DestroyBrowserCompositorView();
 528
 529   // IPC message handlers.
 530   void OnPluginFocusChanged(bool focused, int plugin_id);
 531   void OnStartPluginIme();
 532   void OnGetRenderedTextCompleted(const std::string& text);
 533
 534   // Send updated vsync parameters to the renderer.
 535   void SendVSyncParametersToRenderer();
 536
 537   // Dispatches a TTS session.
 538   void SpeakText(const std::string& text);
 539
 540   // The associated view. This is weak and is inserted into the view hierarchy
 541   // to own this RenderWidgetHostViewMac object. Set to nil at the start of the
 542   // destructor.
 543   RenderWidgetHostViewCocoa* cocoa_view_;
 544
 545   // Indicates if the page is loading.
 546   bool is_loading_;
 547
 548   // Whether it's allowed to pause waiting for a new frame.
 549   bool allow_pause_for_resize_or_repaint_;
 550
 551   // The last scroll offset of the view.
 552   gfx::Vector2dF last_scroll_offset_;
 553
 554   // The text to be shown in the tooltip, supplied by the renderer.
 555   base::string16 tooltip_text_;
 556
 557   // True when this view acts as a platform view hack for a
 558   // RenderWidgetHostViewGuest.
 559   bool is_guest_view_hack_;
 560
 561   // selected text on the renderer.
 562   std::string selected_text_;
 563
 564   // The window used for popup widgets.
 565   base::scoped_nsobject<NSWindow> popup_window_;
 566
 567   // The fullscreen window used for pepper flash.
 568   base::scoped_nsobject<NSWindow> pepper_fullscreen_window_;
 569   base::scoped_nsobject<FullscreenWindowManager> fullscreen_window_manager_;
 570   // Our parent host view, if this is fullscreen.  NULL otherwise.
 571   RenderWidgetHostViewMac* fullscreen_parent_host_view_;
 572
 573   // Display link for getting vsync info.
 574   scoped_refptr<DisplayLinkMac> display_link_;
 575
 576   // The current VSync timebase and interval. This is zero until the first call
 577   // to SendVSyncParametersToRenderer(), and refreshed regularly thereafter.
 578   base::TimeTicks vsync_timebase_;
 579   base::TimeDelta vsync_interval_;
 580
 581   // The current composition character range and its bounds.
 582   gfx::Range composition_range_;
 583   std::vector<gfx::Rect> composition_bounds_;
 584
 585   // The current caret bounds.
 586   gfx::Rect caret_rect_;
 587
 588   // Factory used to safely scope delayed calls to ShutdownHost().
 589   base::WeakPtrFactory<RenderWidgetHostViewMac> weak_factory_;
 590
 591   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewMac);
 592 };
 593
 594 }  // namespace content
 595
 596 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MAC_H_