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:
  explicit AppsSearchResultsModelBridge(
      AppsSearchResultsController* results_controller);
  ~AppsSearchResultsModelBridge() override;

  // 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);

 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:
  void ListItemsAdded(size_t start, size_t count) override;
  void ListItemsRemoved(size_t start, size_t count) override;
  void ListItemMoved(size_t index, size_t target_index) override;
  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_