chrome/browser/ui/webui/foreign_session_handler.h

   1 // Copyright 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_UI_WEBUI_FOREIGN_SESSION_HANDLER_H_
   6 #define CHROME_BROWSER_UI_WEBUI_FOREIGN_SESSION_HANDLER_H_
   7
   8 #include <vector>
   9
  10 #include "base/time/time.h"
  11 #include "chrome/browser/sessions/session_service.h"
  12 #include "components/sync_driver/open_tabs_ui_delegate.h"
  13 #include "content/public/browser/notification_observer.h"
  14 #include "content/public/browser/notification_registrar.h"
  15 #include "content/public/browser/web_ui.h"
  16 #include "content/public/browser/web_ui_message_handler.h"
  17
  18 namespace sessions {
  19 struct SessionTab;
  20 struct SessionWindow;
  21 }
  22
  23 namespace user_prefs {
  24 class PrefRegistrySyncable;
  25 }
  26
  27 namespace browser_sync {
  28
  29 class ForeignSessionHandler : public content::WebUIMessageHandler,
  30                               public content::NotificationObserver {
  31  public:
  32   // Invalid value, used to note that we don't have a tab or window number.
  33   static const int kInvalidId = -1;
  34
  35   // WebUIMessageHandler implementation.
  36   void RegisterMessages() override;
  37
  38   ForeignSessionHandler();
  39   ~ForeignSessionHandler() override {}
  40
  41   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
  42
  43   static void OpenForeignSessionTab(content::WebUI* web_ui,
  44                                     const std::string& session_string_value,
  45                                     SessionID::id_type window_num,
  46                                     SessionID::id_type tab_id,
  47                                     const WindowOpenDisposition& disposition);
  48
  49   static void OpenForeignSessionWindows(content::WebUI* web_ui,
  50                                         const std::string& session_string_value,
  51                                         SessionID::id_type window_num);
  52
  53   // Returns a pointer to the current session model associator or NULL.
  54   static sync_driver::OpenTabsUIDelegate* GetOpenTabsUIDelegate(
  55       content::WebUI* web_ui);
  56
  57  private:
  58   // Determines how ForeignSessionHandler will interact with the new tab page.
  59   void Observe(int type,
  60                const content::NotificationSource& source,
  61                const content::NotificationDetails& details) override;
  62
  63   // Returns true if tab sync is enabled for this profile, otherwise false.
  64   bool IsTabSyncEnabled();
  65
  66   // Returns a string used to show the user when a session was last modified.
  67   base::string16 FormatSessionTime(const base::Time& time);
  68
  69   // Determines which session is to be opened, and then calls
  70   // OpenForeignSession, to begin the process of opening a new browser window.
  71   // This is a javascript callback handler.
  72   void HandleOpenForeignSession(const base::ListValue* args);
  73
  74   // Determines whether foreign sessions should be obtained from the sync model.
  75   // This is a javascript callback handler, and it is also called when the sync
  76   // model has changed and the new tab page needs to reflect the changes.
  77   void HandleGetForeignSessions(const base::ListValue* args);
  78
  79   // Delete a foreign session. This will remove it from the list of foreign
  80   // sessions on all devices. It will reappear if the session is re-activated
  81   // on the original device.
  82   // This is a javascript callback handler.
  83   void HandleDeleteForeignSession(const base::ListValue* args);
  84
  85   void HandleSetForeignSessionCollapsed(const base::ListValue* args);
  86
  87   // The Registrar used to register ForeignSessionHandler for notifications.
  88   content::NotificationRegistrar registrar_;
  89
  90   // The time at which this WebUI was created. Used to calculate how long
  91   // the WebUI was present before the sessions data was visible.
  92   base::TimeTicks load_attempt_time_;
  93
  94   DISALLOW_COPY_AND_ASSIGN(ForeignSessionHandler);
  95 };
  96
  97 }  // namespace browser_sync
  98
  99 #endif  // CHROME_BROWSER_UI_WEBUI_FOREIGN_SESSION_HANDLER_H_