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/IOSurface.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 struct ViewHostMsg_TextInputState_Params;
  39
  40 namespace content {
  41 class RenderWidgetHostImpl;
  42 class RenderWidgetHostViewMac;
  43 class RenderWidgetHostViewMacEditCommandHelper;
  44 class WebContents;
  45 }
  46
  47 namespace ui {
  48 class Compositor;
  49 class Layer;
  50 }
  51
  52 @class FullscreenWindowManager;
  53 @protocol RenderWidgetHostViewMacDelegate;
  54
  55 @protocol RenderWidgetHostViewMacOwner
  56 - (content::RenderWidgetHostViewMac*)renderWidgetHostViewMac;
  57 @end
  58
  59 // This is the view that lives in the Cocoa view hierarchy. In Windows-land,
  60 // RenderWidgetHostViewWin is both the view and the delegate. We split the roles
  61 // but that means that the view needs to own the delegate and will dispose of it
  62 // when it's removed from the view system.
  63 @interface RenderWidgetHostViewCocoa
  64     : ToolTipBaseView<RenderWidgetHostViewMacBase,
  65                       RenderWidgetHostViewMacOwner,
  66                       NSTextInputClient> {
  67  @private
  68   scoped_ptr<content::RenderWidgetHostViewMac> renderWidgetHostView_;
  69   // This ivar is the cocoa delegate of the NSResponder.
  70   base::scoped_nsobject<NSObject<RenderWidgetHostViewMacDelegate>>
  71       responderDelegate_;
  72   BOOL canBeKeyView_;
  73   BOOL closeOnDeactivate_;
  74   BOOL opaque_;
  75   scoped_ptr<content::RenderWidgetHostViewMacEditCommandHelper>
  76       editCommand_helper_;
  77
  78   // Is YES if there was a mouse-down as yet unbalanced with a mouse-up.
  79   BOOL hasOpenMouseDown_;
  80
  81   NSWindow* lastWindow_;  // weak
  82
  83   // The cursor for the page. This is passed up from the renderer.
  84   base::scoped_nsobject<NSCursor> currentCursor_;
  85
  86   // Variables used by our implementaion of the NSTextInput protocol.
  87   // An input method of Mac calls the methods of this protocol not only to
  88   // notify an application of its status, but also to retrieve the status of
  89   // the application. That is, an application cannot control an input method
  90   // directly.
  91   // This object keeps the status of a composition of the renderer and returns
  92   // it when an input method asks for it.
  93   // We need to implement Objective-C methods for the NSTextInput protocol. On
  94   // the other hand, we need to implement a C++ method for an IPC-message
  95   // handler which receives input-method events from the renderer.
  96
  97   // Represents the input-method attributes supported by this object.
  98   base::scoped_nsobject<NSArray> validAttributesForMarkedText_;
  99
 100   // Indicates if we are currently handling a key down event.
 101   BOOL handlingKeyDown_;
 102
 103   // Indicates if there is any marked text.
 104   BOOL hasMarkedText_;
 105
 106   // Indicates if unmarkText is called or not when handling a keyboard
 107   // event.
 108   BOOL unmarkTextCalled_;
 109
 110   // The range of current marked text inside the whole content of the DOM node
 111   // being edited.
 112   // TODO(suzhe): This is currently a fake value, as we do not support accessing
 113   // the whole content yet.
 114   NSRange markedRange_;
 115
 116   // The selected range, cached from a message sent by the renderer.
 117   NSRange selectedRange_;
 118
 119   // Text to be inserted which was generated by handling a key down event.
 120   base::string16 textToBeInserted_;
 121
 122   // Marked text which was generated by handling a key down event.
 123   base::string16 markedText_;
 124
 125   // Selected range of |markedText_|.
 126   NSRange markedTextSelectedRange_;
 127
 128   // Underline information of the |markedText_|.
 129   std::vector<blink::WebCompositionUnderline> underlines_;
 130
 131   // Indicates if doCommandBySelector method receives any edit command when
 132   // handling a key down event.
 133   BOOL hasEditCommands_;
 134
 135   // Contains edit commands received by the -doCommandBySelector: method when
 136   // handling a key down event, not including inserting commands, eg. insertTab,
 137   // etc.
 138   content::EditCommands editCommands_;
 139
 140   // The plugin that currently has focus (-1 if no plugin has focus).
 141   int focusedPluginIdentifier_;
 142
 143   // Whether or not plugin IME is currently enabled active.
 144   BOOL pluginImeActive_;
 145
 146   // Whether the previous mouse event was ignored due to hitTest check.
 147   BOOL mouseEventWasIgnored_;
 148
 149   // Event monitor for scroll wheel end event.
 150   id endWheelMonitor_;
 151
 152   // When a gesture starts, the system does not inform the view of which type
 153   // of gesture is happening (magnify, rotate, etc), rather, it just informs
 154   // the view that some as-yet-undefined gesture is starting. Capture the
 155   // information about the gesture's beginning event here. It will be used to
 156   // create a specific gesture begin event later.
 157   scoped_ptr<blink::WebGestureEvent> gestureBeginEvent_;
 158
 159   // To avoid accidental pinches, require that a certain zoom threshold be
 160   // reached before forwarding it to the browser. Use |pinchUnusedAmount_| to
 161   // hold this value. If the user reaches this value, don't re-require the
 162   // threshold be reached until the page has been zoomed back to page scale of
 163   // one.
 164   bool pinchHasReachedZoomThreshold_;
 165   float pinchUnusedAmount_;
 166   NSTimeInterval pinchLastGestureTimestamp_;
 167
 168   // This is set if a GesturePinchBegin event has been sent in the lifetime of
 169   // |gestureBeginEvent_|. If set, a GesturePinchEnd will be sent when the
 170   // gesture ends.
 171   BOOL gestureBeginPinchSent_;
 172
 173   // If true then escape key down events are suppressed until the first escape
 174   // key up event. (The up event is suppressed as well). This is used by the
 175   // flash fullscreen code to avoid sending a key up event without a matching
 176   // key down event.
 177   BOOL suppressNextEscapeKeyUp_;
 178
 179   // The set of key codes from key down events that we haven't seen the matching
 180   // key up events yet.
 181   // Used for filtering out non-matching NSKeyUp events.
 182   std::set<unsigned short> keyDownCodes_;
 183
 184   // The filter used to guide touch events towards a horizontal or vertical
 185   // orientation.
 186   content::MouseWheelRailsFilterMac mouseWheelFilter_;
 187 }
 188
 189 @property(nonatomic, readonly) NSRange selectedRange;
 190 @property(nonatomic, readonly) BOOL suppressNextEscapeKeyUp;
 191
 192 - (void)setCanBeKeyView:(BOOL)can;
 193 - (void)setCloseOnDeactivate:(BOOL)b;
 194 - (void)setOpaque:(BOOL)opaque;
 195 // True for always-on-top special windows (e.g. Balloons and Panels).
 196 - (BOOL)acceptsMouseEventsWhenInactive;
 197 // Cancel ongoing composition (abandon the marked text).
 198 - (void)cancelComposition;
 199 // Confirm ongoing composition.
 200 - (void)confirmComposition;
 201 // Enables or disables plugin IME.
 202 - (void)setPluginImeActive:(BOOL)active;
 203 // Updates the current plugin focus state.
 204 - (void)pluginFocusChanged:(BOOL)focused forPlugin:(int)pluginId;
 205 // Evaluates the event in the context of plugin IME, if plugin IME is enabled.
 206 // Returns YES if the event was handled.
 207 - (BOOL)postProcessEventForPluginIme:(NSEvent*)event;
 208 - (void)updateCursor:(NSCursor*)cursor;
 209 - (NSRect)firstViewRectForCharacterRange:(NSRange)theRange
 210                              actualRange:(NSRangePointer)actualRange;
 211 @end
 212
 213 namespace content {
 214
 215 ///////////////////////////////////////////////////////////////////////////////
 216 // RenderWidgetHostViewMac
 217 //
 218 //  An object representing the "View" of a rendered web page. This object is
 219 //  responsible for displaying the content of the web page, and integrating with
 220 //  the Cocoa view system. It is the implementation of the RenderWidgetHostView
 221 //  that the cross-platform RenderWidgetHost object uses
 222 //  to display the data.
 223 //
 224 //  Comment excerpted from render_widget_host.h:
 225 //
 226 //    "The lifetime of the RenderWidgetHost* is tied to the render process.
 227 //     If the render process dies, the RenderWidgetHost* goes away and all
 228 //     references to it must become NULL."
 229 //
 230 // RenderWidgetHostView class hierarchy described in render_widget_host_view.h.
 231 class CONTENT_EXPORT RenderWidgetHostViewMac
 232     : public RenderWidgetHostViewBase,
 233       public DelegatedFrameHostClient,
 234       public ui::AcceleratedWidgetMacNSView,
 235       public IPC::Sender,
 236       public gfx::DisplayObserver {
 237  public:
 238   // The view will associate itself with the given widget. The native view must
 239   // be hooked up immediately to the view hierarchy, or else when it is
 240   // deleted it will delete this out from under the caller.
 241   //
 242   // When |is_guest_view_hack| is true, this view isn't really the view for
 243   // the |widget|, a RenderWidgetHostViewGuest is.
 244   // TODO(lazyboy): Remove |is_guest_view_hack| once BrowserPlugin has migrated
 245   // to use RWHVChildFrame (http://crbug.com/330264).
 246   RenderWidgetHostViewMac(RenderWidgetHost* widget, bool is_guest_view_hack);
 247   ~RenderWidgetHostViewMac() override;
 248
 249   RenderWidgetHostViewCocoa* cocoa_view() const { return cocoa_view_; }
 250
 251   // |delegate| is used to separate out the logic from the NSResponder delegate.
 252   // |delegate| is retained by this class.
 253   // |delegate| should be set at most once.
 254   CONTENT_EXPORT void SetDelegate(
 255     NSObject<RenderWidgetHostViewMacDelegate>* delegate);
 256   void SetAllowPauseForResizeOrRepaint(bool allow);
 257
 258   // RenderWidgetHostView implementation.
 259   bool OnMessageReceived(const IPC::Message& msg) override;
 260   void InitAsChild(gfx::NativeView parent_view) override;
 261   RenderWidgetHost* GetRenderWidgetHost() const override;
 262   void SetSize(const gfx::Size& size) override;
 263   void SetBounds(const gfx::Rect& rect) override;
 264   gfx::Vector2dF GetLastScrollOffset() const override;
 265   gfx::NativeView GetNativeView() const override;
 266   gfx::NativeViewId GetNativeViewId() const override;
 267   gfx::NativeViewAccessible GetNativeViewAccessible() override;
 268   bool HasFocus() const override;
 269   bool IsSurfaceAvailableForCopy() const override;
 270   void Show() override;
 271   void Hide() override;
 272   bool IsShowing() override;
 273   void WasUnOccluded() override;
 274   void WasOccluded() override;
 275   gfx::Rect GetViewBounds() const override;
 276   void SetShowingContextMenu(bool showing) override;
 277   void SetActive(bool active) override;
 278   void SetWindowVisibility(bool visible) override;
 279   void WindowFrameChanged() override;
 280   void ShowDefinitionForSelection() override;
 281   bool SupportsSpeech() const override;
 282   void SpeakSelection() override;
 283   bool IsSpeaking() const override;
 284   void StopSpeaking() override;
 285   void SetBackgroundColor(SkColor color) override;
 286
 287   // Implementation of RenderWidgetHostViewBase.
 288   void InitAsPopup(RenderWidgetHostView* parent_host_view,
 289                    const gfx::Rect& pos) override;
 290   void InitAsFullscreen(RenderWidgetHostView* reference_host_view) override;
 291   void MovePluginWindows(const std::vector<WebPluginGeometry>& moves) override;
 292   void Focus() override;
 293   void UpdateCursor(const WebCursor& cursor) override;
 294   void SetIsLoading(bool is_loading) override;
 295   void TextInputStateChanged(
 296       const ViewHostMsg_TextInputState_Params& params) override;
 297   void ImeCancelComposition() override;
 298   void ImeCompositionRangeChanged(
 299       const gfx::Range& range,
 300       const std::vector<gfx::Rect>& character_bounds) override;
 301   void RenderProcessGone(base::TerminationStatus status,
 302                          int error_code) override;
 303   void RenderWidgetHostGone() override;
 304   void Destroy() override;
 305   void SetTooltipText(const base::string16& tooltip_text) override;
 306   void SelectionChanged(const base::string16& text,
 307                         size_t offset,
 308                         const gfx::Range& range) override;
 309   void SelectionBoundsChanged(
 310       const ViewHostMsg_SelectionBounds_Params& params) override;
 311   void CopyFromCompositingSurface(const gfx::Rect& src_subrect,
 312                                   const gfx::Size& dst_size,
 313                                   ReadbackRequestCallback& callback,
 314                                   SkColorType preferred_color_type) override;
 315   void CopyFromCompositingSurfaceToVideoFrame(
 316       const gfx::Rect& src_subrect,
 317       const scoped_refptr<media::VideoFrame>& target,
 318       const base::Callback<void(bool)>& callback) override;
 319   bool CanCopyToVideoFrame() const override;
 320   bool CanSubscribeFrame() const override;
 321   void BeginFrameSubscription(
 322       scoped_ptr<RenderWidgetHostViewFrameSubscriber> subscriber) override;
 323   void EndFrameSubscription() override;
 324   void OnSwapCompositorFrame(uint32 output_surface_id,
 325                              scoped_ptr<cc::CompositorFrame> frame) override;
 326   BrowserAccessibilityManager* CreateBrowserAccessibilityManager(
 327       BrowserAccessibilityDelegate* delegate) override;
 328   gfx::Point AccessibilityOriginInScreen(const gfx::Rect& bounds) override;
 329   bool PostProcessEventForPluginIme(
 330       const NativeWebKeyboardEvent& event) override;
 331
 332   bool HasAcceleratedSurface(const gfx::Size& desired_size) override;
 333   void GetScreenInfo(blink::WebScreenInfo* results) override;
 334   gfx::Rect GetBoundsInRootWindow() override;
 335   gfx::GLSurfaceHandle GetCompositingSurface() override;
 336
 337   bool LockMouse() override;
 338   void UnlockMouse() override;
 339   void WheelEventAck(const blink::WebMouseWheelEvent& event,
 340                      InputEventAckState ack_result) override;
 341
 342   uint32_t GetSurfaceIdNamespace() override;
 343
 344   // IPC::Sender implementation.
 345   bool Send(IPC::Message* message) override;
 346
 347   // gfx::DisplayObserver implementation.
 348   void OnDisplayAdded(const gfx::Display& new_display) override;
 349   void OnDisplayRemoved(const gfx::Display& old_display) override;
 350   void OnDisplayMetricsChanged(const gfx::Display& display,
 351                                uint32_t metrics) override;
 352
 353   // Forwards the mouse event to the renderer.
 354   void ForwardMouseEvent(const blink::WebMouseEvent& event);
 355
 356   void KillSelf();
 357
 358   void SetTextInputActive(bool active);
 359
 360   // Sends completed plugin IME notification and text back to the renderer.
 361   void PluginImeCompositionCompleted(const base::string16& text, int plugin_id);
 362
 363   const std::string& selected_text() const { return selected_text_; }
 364
 365   // Returns true and stores first rectangle for character range if the
 366   // requested |range| is already cached, otherwise returns false.
 367   // Exposed for testing.
 368   CONTENT_EXPORT bool GetCachedFirstRectForCharacterRange(
 369       NSRange range, NSRect* rect, NSRange* actual_range);
 370
 371   // Returns true if there is line break in |range| and stores line breaking
 372   // point to |line_breaking_point|. The |line_break_point| is valid only if
 373   // this function returns true.
 374   bool GetLineBreakIndex(const std::vector<gfx::Rect>& bounds,
 375                          const gfx::Range& range,
 376                          size_t* line_break_point);
 377
 378   // Returns composition character boundary rectangle. The |range| is
 379   // composition based range. Also stores |actual_range| which is corresponding
 380   // to actually used range for returned rectangle.
 381   gfx::Rect GetFirstRectForCompositionRange(const gfx::Range& range,
 382                                             gfx::Range* actual_range);
 383
 384   // Converts from given whole character range to composition oriented range. If
 385   // the conversion failed, return gfx::Range::InvalidRange.
 386   gfx::Range ConvertCharacterRangeToCompositionRange(
 387       const gfx::Range& request_range);
 388
 389   WebContents* GetWebContents();
 390
 391   // These member variables should be private, but the associated ObjC class
 392   // needs access to them and can't be made a friend.
 393
 394   // The associated Model.  Can be NULL if Destroy() is called when
 395   // someone (other than superview) has retained |cocoa_view_|.
 396   RenderWidgetHostImpl* render_widget_host_;
 397
 398   // Current text input type.
 399   ui::TextInputType text_input_type_;
 400   bool can_compose_inline_;
 401
 402   // The background CoreAnimation layer which is hosted by |cocoa_view_|.
 403   base::scoped_nsobject<CALayer> background_layer_;
 404
 405   // The state of |delegated_frame_host_| and |browser_compositor_| to
 406   // manage being visible, hidden, or occluded.
 407   enum BrowserCompositorViewState {
 408     // Effects:
 409     // - |browser_compositor_| exists and |delegated_frame_host_| is
 410     //    visible.
 411     // Happens when:
 412     // - |render_widet_host_| is in the visible state (this includes when
 413     //   the tab isn't visible, but tab capture is enabled).
 414     BrowserCompositorActive,
 415     // Effects:
 416     // - |browser_compositor_| exists, but |delegated_frame_host_| has
 417     //   been hidden.
 418     // Happens when:
 419     // - The |render_widget_host_| is hidden, but |cocoa_view_| is still in the
 420     //   NSWindow hierarchy.
 421     // - This happens when |cocoa_view_| is hidden (minimized, on another
 422     //   occluded by other windows, etc). The |browser_compositor_| and
 423     //   its CALayers are kept around so that we will have content to show when
 424     //   we are un-occluded.
 425     BrowserCompositorSuspended,
 426     // Effects:
 427     // - |browser_compositor_| has been destroyed and
 428     //   |delegated_frame_host_| has been hidden.
 429     // Happens when:
 430     // - The |render_widget_host_| is hidden or dead, and |cocoa_view_| is not
 431     //   attached to a NSWindow.
 432     // - This happens for backgrounded tabs.
 433     BrowserCompositorDestroyed,
 434   };
 435   BrowserCompositorViewState browser_compositor_state_;
 436
 437   // Delegated frame management and compositor.
 438   scoped_ptr<DelegatedFrameHost> delegated_frame_host_;
 439   scoped_ptr<ui::Layer> root_layer_;
 440
 441   // Container for ui::Compositor the CALayer tree drawn by it.
 442   scoped_ptr<BrowserCompositorMac> browser_compositor_;
 443
 444   // Placeholder that is allocated while browser_compositor_ is NULL,
 445   // indicating that a BrowserCompositorViewMac may be allocated. This is to
 446   // help in recycling the internals of BrowserCompositorViewMac.
 447   scoped_ptr<BrowserCompositorMacPlaceholder>
 448       browser_compositor_placeholder_;
 449
 450   // Set when the currently-displayed frame is the minimum scale. Used to
 451   // determine if pinch gestures need to be thresholded.
 452   bool page_at_minimum_scale_;
 453
 454   NSWindow* pepper_fullscreen_window() const {
 455     return pepper_fullscreen_window_;
 456   }
 457
 458   CONTENT_EXPORT void release_pepper_fullscreen_window_for_testing();
 459
 460   RenderWidgetHostViewMac* fullscreen_parent_host_view() const {
 461     return fullscreen_parent_host_view_;
 462   }
 463
 464   int window_number() const;
 465
 466   // The scale factor for the screen that the view is currently on.
 467   float ViewScaleFactor() const;
 468
 469   // Update the scale factor for the backing store and for any CALayers.
 470   void UpdateBackingStoreScaleFactor();
 471
 472   // Ensure that the display link is associated with the correct display.
 473   void UpdateDisplayLink();
 474
 475   void PauseForPendingResizeOrRepaintsAndDraw();
 476
 477   // DelegatedFrameHostClient implementation.
 478   ui::Layer* DelegatedFrameHostGetLayer() const override;
 479   bool DelegatedFrameHostIsVisible() const override;
 480   gfx::Size DelegatedFrameHostDesiredSizeInDIP() const override;
 481   bool DelegatedFrameCanCreateResizeLock() const override;
 482   scoped_ptr<ResizeLock> DelegatedFrameHostCreateResizeLock(
 483       bool defer_compositor_lock) override;
 484   void DelegatedFrameHostResizeLockWasReleased() override;
 485   void DelegatedFrameHostSendCompositorSwapAck(
 486       int output_surface_id,
 487       const cc::CompositorFrameAck& ack) override;
 488   void DelegatedFrameHostSendReclaimCompositorResources(
 489       int output_surface_id,
 490       const cc::CompositorFrameAck& ack) override;
 491   void DelegatedFrameHostOnLostCompositorResources() override;
 492   void DelegatedFrameHostUpdateVSyncParameters(
 493       const base::TimeTicks& timebase,
 494       const base::TimeDelta& interval) override;
 495
 496   // AcceleratedWidgetMacNSView implementation.
 497   NSView* AcceleratedWidgetGetNSView() const override;
 498   bool AcceleratedWidgetShouldIgnoreBackpressure() const override;
 499   void AcceleratedWidgetSwapCompleted(
 500       const std::vector<ui::LatencyInfo>& latency_info) override;
 501   void AcceleratedWidgetHitError() override;
 502
 503   // Transition from being in the Suspended state to being in the Destroyed
 504   // state, if appropriate (see BrowserCompositorViewState for details).
 505   void DestroySuspendedBrowserCompositorViewIfNeeded();
 506
 507  private:
 508   friend class RenderWidgetHostViewMacTest;
 509
 510   // Returns whether this render view is a popup (autocomplete window).
 511   bool IsPopup() const;
 512
 513   // Shuts down the render_widget_host_.  This is a separate function so we can
 514   // invoke it from the message loop.
 515   void ShutdownHost();
 516
 517   // Tear down all components of the browser compositor in an order that will
 518   // ensure no dangling references.
 519   void ShutdownBrowserCompositor();
 520
 521   // The state of the the browser compositor and delegated frame host. See
 522   // BrowserCompositorViewState for details.
 523   void EnsureBrowserCompositorView();
 524   void SuspendBrowserCompositorView();
 525   void DestroyBrowserCompositorView();
 526
 527   // IPC message handlers.
 528   void OnPluginFocusChanged(bool focused, int plugin_id);
 529   void OnStartPluginIme();
 530   void OnGetRenderedTextCompleted(const std::string& text);
 531
 532   // Send updated vsync parameters to the renderer.
 533   void SendVSyncParametersToRenderer();
 534
 535   // Dispatches a TTS session.
 536   void SpeakText(const std::string& text);
 537
 538   // The associated view. This is weak and is inserted into the view hierarchy
 539   // to own this RenderWidgetHostViewMac object. Set to nil at the start of the
 540   // destructor.
 541   RenderWidgetHostViewCocoa* cocoa_view_;
 542
 543   // Indicates if the page is loading.
 544   bool is_loading_;
 545
 546   // Whether it's allowed to pause waiting for a new frame.
 547   bool allow_pause_for_resize_or_repaint_;
 548
 549   // The last scroll offset of the view.
 550   gfx::Vector2dF last_scroll_offset_;
 551
 552   // The text to be shown in the tooltip, supplied by the renderer.
 553   base::string16 tooltip_text_;
 554
 555   // True when this view acts as a platform view hack for a
 556   // RenderWidgetHostViewGuest.
 557   bool is_guest_view_hack_;
 558
 559   // selected text on the renderer.
 560   std::string selected_text_;
 561
 562   // The window used for popup widgets.
 563   base::scoped_nsobject<NSWindow> popup_window_;
 564
 565   // The fullscreen window used for pepper flash.
 566   base::scoped_nsobject<NSWindow> pepper_fullscreen_window_;
 567   base::scoped_nsobject<FullscreenWindowManager> fullscreen_window_manager_;
 568   // Our parent host view, if this is fullscreen.  NULL otherwise.
 569   RenderWidgetHostViewMac* fullscreen_parent_host_view_;
 570
 571   // Display link for getting vsync info.
 572   scoped_refptr<ui::DisplayLinkMac> display_link_;
 573
 574   // The current VSync timebase and interval. This is zero until the first call
 575   // to SendVSyncParametersToRenderer(), and refreshed regularly thereafter.
 576   base::TimeTicks vsync_timebase_;
 577   base::TimeDelta vsync_interval_;
 578
 579   // The current composition character range and its bounds.
 580   gfx::Range composition_range_;
 581   std::vector<gfx::Rect> composition_bounds_;
 582
 583   // The current caret bounds.
 584   gfx::Rect caret_rect_;
 585
 586   // Factory used to safely scope delayed calls to ShutdownHost().
 587   base::WeakPtrFactory<RenderWidgetHostViewMac> weak_factory_;
 588
 589   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewMac);
 590 };
 591
 592 }  // namespace content
 593
 594 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MAC_H_