chromeos: Refactor the code for showing the network UI.

ui/chromeos/network/network_list.h

+// Copyright 2014 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_CHROMEOS_NETWORK_NETWORK_LIST_H_
+#define UI_CHROMEOS_NETWORK_NETWORK_LIST_H_
+
+#include <map>
+#include <set>
+#include <string>
+
+#include "chromeos/network/network_state_handler.h"
+#include "ui/chromeos/network/network_icon_animation_observer.h"
+#include "ui/chromeos/ui_chromeos_export.h"
+#include "ui/gfx/image/image_skia.h"
+
+namespace views {
+class Label;
+class View;
+}
+
+namespace ui {
+
+struct NetworkInfo;
+class NetworkListDelegate;
+
+// NetworkListView can be used to present the list of available networks to the
+// user.
+class UI_CHROMEOS_EXPORT NetworkListView
+    : public network_icon::AnimationObserver {
+ public:
+  explicit NetworkListView(NetworkListDelegate* delegate);
+  virtual ~NetworkListView();
+
+  void UpdateNetworkList();
+
+  // Returns whether |view| is a View that represents a network in the list.
+  // |service_path| is set to the service-path of the network if this returns
+  // true, and remains unchanged if this returns false.
+  bool IsViewInList(views::View* view, std::string* service_path) const;
+
+  void set_content_view(views::View* content) { content_ = content; }
+
+ private:
+  void UpdateNetworks(
+      const chromeos::NetworkStateHandler::NetworkStateList& networks);
+  void UpdateNetworkListInternal();
+  bool UpdateNetworkListEntries(std::set<std::string>* new_service_paths);
+  bool UpdateNetworkChild(int index, const NetworkInfo* info);
+  bool PlaceViewAtIndex(views::View* view, int index);
+  bool UpdateInfoLabel(int message_id, int index, views::Label** label);
+
+  // network_icon::AnimationObserver:
+  virtual void NetworkIconChanged() OVERRIDE;
+
+  NetworkListDelegate* delegate_;
+  views::View* content_;
+
+  views::Label* scanning_view_;
+  views::Label* no_wifi_networks_view_;
+  views::Label* no_cellular_networks_view_;
+
+  // An owned list of network info.
+  ScopedVector<NetworkInfo> network_list_;
+
+  typedef std::map<views::View*, std::string> NetworkMap;
+  NetworkMap network_map_;
+
+  // A map of network service paths to their view.
+  typedef std::map<std::string, views::View*> ServicePathMap;
+  ServicePathMap service_path_map_;
+
+  DISALLOW_COPY_AND_ASSIGN(NetworkListView);
+};
+
+}  // namespace ui
+
+#endif  // UI_CHROMEOS_NETWORK_NETWORK_LIST_H_