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      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 CHROME_BROWSER_RENDERER_HOST_CHROME_RENDER_WIDGET_HOST_VIEW_DELEGATE_H_
      6 #define CHROME_BROWSER_RENDERER_HOST_CHROME_RENDER_WIDGET_HOST_VIEW_DELEGATE_H_
      7 
      8 #import <Cocoa/Cocoa.h>
      9 
     10 #include "base/memory/scoped_ptr.h"
     11 #import "content/public/browser/render_widget_host_view_mac_delegate.h"
     12 
     13 namespace content {
     14 class RenderWidgetHost;
     15 }
     16 
     17 namespace ChromeRenderWidgetHostViewMacDelegateInternal {
     18 class SpellCheckRenderViewObserver;
     19 }
     20 
     21 @interface ChromeRenderWidgetHostViewMacDelegate
     22     : NSObject<RenderWidgetHostViewMacDelegate> {
     23  @private
     24   content::RenderWidgetHost* renderWidgetHost_;  // weak
     25   scoped_ptr<ChromeRenderWidgetHostViewMacDelegateInternal::
     26       SpellCheckRenderViewObserver> spellingObserver_;
     27 
     28   // If the viewport is scrolled all the way to the left or right.
     29   // Used for history swiping.
     30   BOOL isPinnedLeft_;
     31   BOOL isPinnedRight_;
     32 
     33   // If the main frame has a horizontal scrollbar.
     34   // Used for history swiping.
     35   BOOL hasHorizontalScrollbar_;
     36 
     37   // If a scroll event came back unhandled from the renderer. Set to |NO| at
     38   // the start of a scroll gesture, and then to |YES| if a scroll event comes
     39   // back unhandled from the renderer.
     40   // Used for history swiping.
     41   BOOL gotUnhandledWheelEvent_;
     42 
     43   // Cumulative scroll delta since scroll gesture start. Only valid during
     44   // scroll gesture handling. Used for history swiping.
     45   NSSize totalScrollDelta_;
     46 
     47   // Used for continuous spell checking.
     48   BOOL spellcheckEnabled_;
     49   BOOL spellcheckChecked_;
     50 }
     51 
     52 - (id)initWithRenderWidgetHost:(content::RenderWidgetHost*)renderWidgetHost;
     53 
     54 - (void)viewGone:(NSView*)view;
     55 - (BOOL)handleEvent:(NSEvent*)event;
     56 - (void)gotUnhandledWheelEvent;
     57 - (void)scrollOffsetPinnedToLeft:(BOOL)left toRight:(BOOL)right;
     58 - (void)setHasHorizontalScrollbar:(BOOL)hasHorizontalScrollbar;
     59 - (BOOL)validateUserInterfaceItem:(id<NSValidatedUserInterfaceItem>)item
     60                       isValidItem:(BOOL*)valid;
     61 
     62 @end
     63 
     64 #endif  // CHROME_BROWSER_RENDERER_HOST_CHROME_RENDER_WIDGET_HOST_VIEW_DELEGATE_H_
     65