1 files changed, 67 insertions, 0 deletions
diff --git a/chromium/ash/shelf/shelf_item_delegate_manager.h b/chromium/ash/shelf/shelf_item_delegate_manager.h
new file mode 100644
index 00000000000..dc4df7339b1
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+++ b/chromium/ash/shelf/shelf_item_delegate_manager.h
@@ -0,0 +1,67 @@
+// 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 ASH_SHELF_SHELF_ITEM_DELEGATE_MANAGER_H_
+#define ASH_SHELF_SHELF_ITEM_DELEGATE_MANAGER_H_
+
+#include <map>
+
+#include "ash/ash_export.h"
+#include "ash/launcher/launcher_types.h"
+#include "ash/shelf/shelf_model_observer.h"
+#include "base/compiler_specific.h"
+#include "base/memory/scoped_ptr.h"
+
+namespace ash {
+class ShelfItemDelegate;
+class ShelfModel;
+
+namespace test {
+class ShelfItemDelegateManagerTestAPI;
+}
+
+// ShelfItemDelegateManager manages the set of ShelfItemDelegates for the
+// launcher. ShelfItemDelegateManager does not create ShelfItemDelegates,
+// rather it is expected that someone else invokes SetShelfItemDelegate
+// appropriately. On the other hand, ShelfItemDelegateManager destroys
+// ShelfItemDelegates when the corresponding item from the model is removed.
+class ASH_EXPORT ShelfItemDelegateManager : public ShelfModelObserver {
+ public:
+  explicit ShelfItemDelegateManager(ShelfModel* model);
+  virtual ~ShelfItemDelegateManager();
+
+  // Set |item_delegate| for |id| and take an ownership.
+  void SetShelfItemDelegate(LauncherID id,
+                            scoped_ptr<ShelfItemDelegate> item_delegate);
+
+  // Returns ShelfItemDelegate for |item_type|. Always returns non-NULL.
+  ShelfItemDelegate* GetShelfItemDelegate(LauncherID id);
+
+  // ShelfModelObserver overrides:
+  virtual void ShelfItemAdded(int model_index) OVERRIDE;
+  virtual void ShelfItemRemoved(int index, LauncherID id) OVERRIDE;
+  virtual void ShelfItemMoved(int start_index, int targetindex) OVERRIDE;
+  virtual void ShelfItemChanged(int index,
+                                const LauncherItem& old_item) OVERRIDE;
+  virtual void ShelfStatusChanged() OVERRIDE;
+
+ private:
+  friend class test::ShelfItemDelegateManagerTestAPI;
+
+  typedef std::map<LauncherID, ShelfItemDelegate*> LauncherIDToItemDelegateMap;
+
+  // Remove and destroy ShelfItemDelegate for |id|.
+  void RemoveShelfItemDelegate(LauncherID id);
+
+  // Owned by Shell.
+  ShelfModel* model_;
+
+  LauncherIDToItemDelegateMap id_to_item_delegate_map_;
+
+  DISALLOW_COPY_AND_ASSIGN(ShelfItemDelegateManager);
+};
+
+}  // namespace ash
+
+#endif  // ASH_SHELF_SHELF_ITEM_DELEGATE_MANAGER_H_