Add "Open with <ARC-app-name>" items to the context menu

chrome/browser/renderer_context_menu/arc_app_menu_observer_chromeos.h

+// Copyright 2016 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_RENDERER_CONTEXT_MENU_ARC_APP_MENU_OBSERVER_CHROMEOS_H_
+#define CHROME_BROWSER_RENDERER_CONTEXT_MENU_ARC_APP_MENU_OBSERVER_CHROMEOS_H_
+
+#include <set>
+
+#include "base/compiler_specific.h"
+#include "base/macros.h"
+#include "base/memory/weak_ptr.h"
+#include "base/strings/string16.h"
+#include "base/timer/timer.h"
+#include "components/arc/common/intent_helper.mojom.h"
+#include "components/renderer_context_menu/render_view_context_menu_observer.h"
+#include "ui/base/models/simple_menu_model.h"
+#include "url/gurl.h"
+
+class RenderViewContextMenuProxy;
+
+// An observer that listens to events from the RenderViewContextMenu class and
+// shows app names received from ARC that can handle the current URL.
+class ArcAppMenuObserver : public RenderViewContextMenuObserver {
+ public:
+  explicit ArcAppMenuObserver(RenderViewContextMenuProxy* proxy);
+  ~ArcAppMenuObserver() override;
+
+  // RenderViewContextMenuObserver implementation.
+  void InitMenu(const content::ContextMenuParams& params) override;
+  bool IsCommandIdSupported(int command_id) override;
+  bool IsCommandIdChecked(int command_id) override;
+  bool IsCommandIdEnabled(int command_id) override;
+  void ExecuteCommand(int command_id) override;
+  void OnMenuCancel() override;
+
+  static std::set<int> GetCommandIdsToEnableForTesting(size_t num_apps);
+  static std::set<int> GetCommandIdsToDisableForTesting(size_t num_apps);
+  static int GetIndexForCommandIdForTesting(int command_id);
+
+ private:
+  base::string16 GetLabelForCommandId(int command_id) const;
+  arc::IntentHelperInstance* GetIntentHelper();
+
+  // A callback function called when a mojo IPC issued in InitMenu finishes.
+  void OnUrlHandlerList(mojo::Array<arc::UrlHandlerInfoPtr> handlers);
+
+  // The callback function for base::RepeatingTimer. This function updates the
+  // "loading..." animation in the context-menu item.
+  void OnAnimationTimerExpired();
+
+  // The interface to add a context-menu item and update it. This class uses
+  // this interface to avoid accesing context-menu items directly.
+  RenderViewContextMenuProxy* proxy_;
+
+  const std::set<int> all_command_ids_;
+  GURL link_url_;
+  mojo::Array<arc::UrlHandlerInfoPtr> handlers_;
+  ui::SimpleMenuModel sub_menu_;
+
+  // The string used for animation until we receive a response from the ARC
+  // process. The current animation just adds periods at the end of this string:
+  //   'Loading' -> 'Loading.' -> 'Loading..' -> 'Loading...' (-> 'Loading')
+  base::string16 loading_message_;
+  size_t loading_frame_;
+
+  // A timer used for loading animation.
+  base::RepeatingTimer animation_timer_;
+
+  // Always keep this the last member of this class to make sure it's the
+  // first thing to be destructed.
+  base::WeakPtrFactory<ArcAppMenuObserver> weak_ptr_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(ArcAppMenuObserver);
+};
+
+#endif  // CHROME_BROWSER_RENDERER_CONTEXT_MENU_ARC_APP_MENU_OBSERVER_CHROMEOS_H_