ash/shelf/shelf_item_delegate_manager.cc

   1 // Copyright 2013 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 #include "ash/shelf/shelf_item_delegate_manager.h"
   6
   7 #include "ash/shelf/shelf_item_delegate.h"
   8 #include "ash/shelf/shelf_model.h"
   9 #include "ash/shell.h"
  10 #include "base/logging.h"
  11 #include "base/stl_util.h"
  12
  13 namespace ash {
  14
  15 ShelfItemDelegateManager::ShelfItemDelegateManager(ShelfModel* model)
  16     : model_(model) {
  17   DCHECK(model_);
  18   model_->AddObserver(this);
  19 }
  20
  21 ShelfItemDelegateManager::~ShelfItemDelegateManager() {
  22   model_->RemoveObserver(this);
  23   STLDeleteContainerPairSecondPointers(id_to_item_delegate_map_.begin(),
  24                                        id_to_item_delegate_map_.end());
  25 }
  26
  27 void ShelfItemDelegateManager::SetShelfItemDelegate(
  28     ShelfID id,
  29     scoped_ptr<ShelfItemDelegate> item_delegate) {
  30   // If another ShelfItemDelegate is already registered for |id|, we assume
  31   // that this request is replacing ShelfItemDelegate for |id| with
  32   // |item_delegate|.
  33   RemoveShelfItemDelegate(id);
  34   id_to_item_delegate_map_[id] = item_delegate.release();
  35 }
  36
  37 ShelfItemDelegate* ShelfItemDelegateManager::GetShelfItemDelegate(ShelfID id) {
  38   if (model_->ItemIndexByID(id) != -1) {
  39     // Each ShelfItem has to have a ShelfItemDelegate.
  40     DCHECK(id_to_item_delegate_map_.find(id) != id_to_item_delegate_map_.end());
  41     return id_to_item_delegate_map_[id];
  42   }
  43   return NULL;
  44 }
  45
  46 void ShelfItemDelegateManager::ShelfItemAdded(int index) {
  47 }
  48
  49 void ShelfItemDelegateManager::ShelfItemRemoved(int index, ShelfID id) {
  50   RemoveShelfItemDelegate(id);
  51 }
  52
  53 void ShelfItemDelegateManager::ShelfItemMoved(int start_index,
  54                                               int target_index) {
  55 }
  56
  57 void ShelfItemDelegateManager::ShelfItemChanged(int index,
  58                                                 const ShelfItem& old_item) {
  59 }
  60
  61 void ShelfItemDelegateManager::ShelfStatusChanged() {
  62 }
  63
  64 void ShelfItemDelegateManager::RemoveShelfItemDelegate(ShelfID id) {
  65   if (id_to_item_delegate_map_.find(id) != id_to_item_delegate_map_.end()) {
  66     delete id_to_item_delegate_map_[id];
  67     id_to_item_delegate_map_.erase(id);
  68   }
  69 }
  70
  71 }  // namespace ash