1 // Copyright (c) 2011 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_NTP_RECENTLY_CLOSED_TABS_HANDLER_H_ 6 #define CHROME_BROWSER_UI_WEBUI_NTP_RECENTLY_CLOSED_TABS_HANDLER_H_ 7 8 #include "base/values.h" 9 #include "chrome/browser/sessions/tab_restore_service.h" 10 #include "chrome/browser/sessions/tab_restore_service_observer.h" 11 #include "content/public/browser/web_ui_message_handler.h" 12 13 class TabRestoreService; 14 15 class RecentlyClosedTabsHandler : public content::WebUIMessageHandler, 16 public TabRestoreServiceObserver { 17 public: RecentlyClosedTabsHandler()18 RecentlyClosedTabsHandler() : tab_restore_service_(NULL) {} 19 virtual ~RecentlyClosedTabsHandler(); 20 21 // WebUIMessageHandler implementation. 22 virtual void RegisterMessages() OVERRIDE; 23 24 // Callback for the "reopenTab" message. Rewrites the history of the 25 // currently displayed tab to be the one in TabRestoreService with a 26 // history of a session passed in through the content pointer. 27 void HandleReopenTab(const base::ListValue* args); 28 29 // Callback for the "getRecentlyClosedTabs" message. 30 void HandleGetRecentlyClosedTabs(const base::ListValue* args); 31 32 // Callback for the "clearRecentlyClosed" message. 33 void HandleClearRecentlyClosed(const base::ListValue* args); 34 35 // Observer callback for TabRestoreServiceObserver. Sends data on 36 // recently closed tabs to the javascript side of this page to 37 // display to the user. 38 virtual void TabRestoreServiceChanged(TabRestoreService* service) OVERRIDE; 39 40 // Observer callback to notice when our associated TabRestoreService 41 // is destroyed. 42 virtual void TabRestoreServiceDestroyed(TabRestoreService* service) OVERRIDE; 43 44 private: 45 // Construct and initialize tab_restore_service_ if it's NULL. 46 // tab_restore_service_ may still be NULL, however, in incognito mode. 47 void EnsureTabRestoreService(); 48 49 // TabRestoreService that we are observing. 50 TabRestoreService* tab_restore_service_; 51 52 DISALLOW_COPY_AND_ASSIGN(RecentlyClosedTabsHandler); 53 }; 54 55 #endif // CHROME_BROWSER_UI_WEBUI_NTP_RECENTLY_CLOSED_TABS_HANDLER_H_ 56