Add ash UI for third-party VPNs

ash/system/chromeos/network/vpn_list_view.h

Index: ash/system/chromeos/network/vpn_list_view.h
diff --git a/ash/system/chromeos/network/vpn_list_view.h b/ash/system/chromeos/network/vpn_list_view.h
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+// Copyright 2015 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_SYSTEM_CHROMEOS_NETWORK_VPN_LIST_VIEW_H_
+#define ASH_SYSTEM_CHROMEOS_NETWORK_VPN_LIST_VIEW_H_
+
+#include <map>
+#include <string>
+
+#include "ash/system/chromeos/network/vpn_delegate.h"
+#include "ash/system/tray/view_click_listener.h"
+#include "base/macros.h"
+#include "chromeos/network/network_state_handler.h"
+#include "ui/chromeos/network/network_list_view_base.h"
+
+namespace chromeos {
+class NetworkState;
+}
+
+namespace ui {
+class NetworkListDelegate;
+}
+
+namespace views {
+class View;
+}
+
+namespace ash {
+
+// A list of VPN providers and networks that shows VPN providers and networks in
+// a hierarchical layout, allowing the user to see at a glance which provider a
+// network belongs to. The only exception is the currently connected or
+// connecting network, which is detached from its provider and moved to the top.
+// If there is a connected network, a disconnect button is shown next to its
+// name.
+//
+// Disconnected networks are arranged in shill's priority order within each
+// provider and the providers are arranged in the order of their highest
+// priority network. Clicking on a disconnected network triggers a connection
+// attempt. Clicking on the currently connected or connecting network shows its
+// configuration dialog. Clicking on a provider shows the provider's "add
+// network" dialog.
+class VPNListView : public ui::NetworkListViewBase,
+                    public VPNDelegate::Observer,
+                    public ViewClickListener {
+ public:
+  explicit VPNListView(ui::NetworkListDelegate* delegate);
+  ~VPNListView() override;
+
+  // ui::NetworkListViewBase:
+  void Update() override;
+  bool IsNetworkEntry(views::View* view,
+                      std::string* service_path) const override;
+
+  // VPNDelegate::Observer:
+  void OnVPNProvidersChanged() override;
+
+  // ViewClickListener:
+  void OnViewClicked(views::View* sender) override;
+
+ private:
+  // Adds a network to the list.
+  void AddNetwork(const chromeos::NetworkState* network);
+
+  // Adds the VPN provider identified by |key| to the list, along with any
+  // networks that belong to this provider.
+  void AddProviderAndNetworks(
+      const VPNProvider::Key& key,
+      const std::string& name,
+      const chromeos::NetworkStateHandler::NetworkStateList& networks);
+
+  // Adds all available VPN providers and networks to the list.
+  void AddProvidersAndNetworks(
+      const chromeos::NetworkStateHandler::NetworkStateList& networks);
+
+  ui::NetworkListDelegate* const delegate_;
+
+  // A mapping from each VPN provider's list entry to the provider's key.
+  std::map<const views::View* const, VPNProvider::Key> provider_view_key_map_;
+
+  // A mapping from each network's list entry to the network's service path.
+  std::map<const views::View* const, std::string>
+      network_view_service_path_map_;
+
+  // Whether the list is currently empty (i.e., the next entry added will become
+  // the topmost entry).
+  bool list_empty_ = true;
+
+  DISALLOW_COPY_AND_ASSIGN(VPNListView);
+};
+
+}  // namespace ash
+
+#endif  // ASH_SYSTEM_CHROMEOS_NETWORK_VPN_LIST_VIEW_H_