mash: Move shelf model and item classes to ash/common/shelf

ash/shelf/shelf_item_delegate_manager.cc

-// 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.
-
-#include "ash/shelf/shelf_item_delegate_manager.h"
-
-#include "ash/shelf/shelf_item_delegate.h"
-#include "ash/shelf/shelf_model.h"
-#include "ash/shell.h"
-#include "base/logging.h"
-#include "base/stl_util.h"
-
-namespace ash {
-
-ShelfItemDelegateManager::ShelfItemDelegateManager(ShelfModel* model)
-    : model_(model) {
-  DCHECK(model_);
-  model_->AddObserver(this);
-}
-
-ShelfItemDelegateManager::~ShelfItemDelegateManager() {
-  model_->RemoveObserver(this);
-  STLDeleteContainerPairSecondPointers(id_to_item_delegate_map_.begin(),
-                                       id_to_item_delegate_map_.end());
-}
-
-void ShelfItemDelegateManager::AddObserver(
-    ShelfItemDelegateManagerObserver* observer) {
-  observers_.AddObserver(observer);
-}
-
-void ShelfItemDelegateManager::RemoveObserver(
-    ShelfItemDelegateManagerObserver* observer) {
-  observers_.RemoveObserver(observer);
-}
-
-void ShelfItemDelegateManager::SetShelfItemDelegate(
-    ShelfID id,
-    std::unique_ptr<ShelfItemDelegate> item_delegate) {
-  // If another ShelfItemDelegate is already registered for |id|, we assume
-  // that this request is replacing ShelfItemDelegate for |id| with
-  // |item_delegate|.
-  RemoveShelfItemDelegate(id);
-
-  FOR_EACH_OBSERVER(ShelfItemDelegateManagerObserver,
-                    observers_,
-                    OnSetShelfItemDelegate(id, item_delegate.get()));
-
-  id_to_item_delegate_map_[id] = item_delegate.release();
-}
-
-ShelfItemDelegate* ShelfItemDelegateManager::GetShelfItemDelegate(ShelfID id) {
-  if (model_->ItemIndexByID(id) != -1) {
-    // Each ShelfItem has to have a ShelfItemDelegate.
-    DCHECK(id_to_item_delegate_map_.find(id) != id_to_item_delegate_map_.end());
-    return id_to_item_delegate_map_[id];
-  }
-  return NULL;
-}
-
-void ShelfItemDelegateManager::ShelfItemAdded(int index) {}
-
-void ShelfItemDelegateManager::ShelfItemRemoved(int index, ShelfID id) {
-  RemoveShelfItemDelegate(id);
-  FOR_EACH_OBSERVER(ShelfItemDelegateManagerObserver,
-                    observers_,
-                    OnSetShelfItemDelegate(id, nullptr));
-}
-
-void ShelfItemDelegateManager::ShelfItemMoved(int start_index,
-                                              int target_index) {}
-
-void ShelfItemDelegateManager::ShelfItemChanged(int index,
-                                                const ShelfItem& old_item) {}
-
-void ShelfItemDelegateManager::RemoveShelfItemDelegate(ShelfID id) {
-  if (id_to_item_delegate_map_.find(id) != id_to_item_delegate_map_.end()) {
-    delete id_to_item_delegate_map_[id];
-    id_to_item_delegate_map_.erase(id);
-  }
-}
-
-}  // namespace ash