[ChromeOS] Implement collected cookies in webui.

chrome/browser/ui/webui/cookies_tree_model_adapter.h

+// Copyright (c) 2011 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 CHROME_BROWSER_UI_WEBUI_COOKIES_TREE_MODEL_ADAPTER_H_
+#define CHROME_BROWSER_UI_WEBUI_COOKIES_TREE_MODEL_ADAPTER_H_
+#pragma once
+
+#include "chrome/browser/cookies_tree_model.h"
+
+class ListValue;
+class WebUI;
+
+// CookiesTreeModelAdapter binds a CookiesTreeModel with a JS tree. It observes
+// tree model changes and forwards them to JS tree. It also provides a
+// a callback for JS tree to load children of a specific node.
+class CookiesTreeModelAdapter : public CookiesTreeModel::Observer {
+ public:
+  CookiesTreeModelAdapter();
+  virtual ~CookiesTreeModelAdapter();
+
+  // Initializes with given WebUI.
+  void Init(WebUI* web_ui);
+
+  // Sets up the bindings between js tree and |model|.
+  // Note that this class does not take ownership of the model.
+  void Bind(const std::string& tree_id, CookiesTreeModel* model);
+
+ private:
+  // CookiesTreeModel::Observer implementation.
+  virtual void TreeNodesAdded(ui::TreeModel* model,
+                              ui::TreeModelNode* parent,
+                              int start,
+                              int count);
+  virtual void TreeNodesRemoved(ui::TreeModel* model,
+                                ui::TreeModelNode* parent,
+                                int start,
+                                int count);
+  virtual void TreeNodeChanged(ui::TreeModel* model, ui::TreeModelNode* node) {}
+  virtual void TreeModelBeginBatch(CookiesTreeModel* model);
+  virtual void TreeModelEndBatch(CookiesTreeModel* model);
+
+  // JS callback that gets the tree node using the tree path info in |args| and
+  // call SendChildren to pass back children nodes data to WebUI.
+  void LoadChildren(const ListValue* args);
+
+  // Get children nodes data and pass it to 'CookiesTree.loadChildren' to
+  // update the WebUI.
+  void SendChildren(CookieTreeNode* parent);
+
+  // Hosting WebUI of the js tree.
+  WebUI* web_ui_;
+
+  // Id of JS tree that is managed by this handler.
+  std::string tree_id_;
+
+  // The Cookies Tree model. Note that we are not owning the model.
+  CookiesTreeModel* model_;
+
+  // Flag to indicate whether there is a batch update in progress.
+  bool batch_update_;
+
+  DISALLOW_COPY_AND_ASSIGN(CookiesTreeModelAdapter);
+};
+
+#endif  // CHROME_BROWSER_UI_WEBUI_COOKIES_TREE_MODEL_ADAPTER_H_