One-click install for the OSX App Launcher

ui/app_list/cocoa/apps_search_results_model_bridge.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_APP_LIST_COCOA_APPS_SEARCH_RESULTS_MODEL_BRIDGE_H_
 #define UI_APP_LIST_COCOA_APPS_SEARCH_RESULTS_MODEL_BRIDGE_H_
 
 #include "base/mac/scoped_nsobject.h"
 #include "base/memory/scoped_vector.h"
 #include "ui/base/models/list_model_observer.h"
 
 @class NSMenu;
 @class AppsSearchResultsController;
 
 namespace app_list {
 
 // Bridge observing the ListModel representing search results in the app list,
 // and updating the NSTableView where they are displayed.
 class AppsSearchResultsModelBridge : public ui::ListModelObserver {
  public:
+  // Lightweight observer to react to icon updates on individual results.
+  class ItemObserver;
+
   explicit AppsSearchResultsModelBridge(
       AppsSearchResultsController* results_controller);
   virtual ~AppsSearchResultsModelBridge();
 
   // Returns the context menu for the item at |index| in the search results
   // model. A menu will be generated if it hasn't been previously requested.
   NSMenu* MenuForItem(size_t index);
 
+  // Returns the width taken up by any action buttons on the item at |index|.
+  CGFloat ActionButtonWidthForItem(size_t index);
+
  private:
-  // Lightweight observer to react to icon updates on individual results.
-  class ItemObserver;
-
   void UpdateItemObservers();
   void ReloadDataForItems(size_t start, size_t count) const;
 
   // Overridden from ui::ListModelObserver:
   virtual void ListItemsAdded(size_t start, size_t count) OVERRIDE;
   virtual void ListItemsRemoved(size_t start, size_t count) OVERRIDE;
   virtual void ListItemMoved(size_t index, size_t target_index) OVERRIDE;
   virtual void ListItemsChanged(size_t start, size_t count) OVERRIDE;
 
   AppsSearchResultsController* parent_;  // Weak. Owns us.
   ScopedVector<ItemObserver> item_observers_;
 
   DISALLOW_COPY_AND_ASSIGN(AppsSearchResultsModelBridge);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_COCOA_APPS_SEARCH_RESULTS_MODEL_BRIDGE_H_