[NTP4] Auto-deletion of empty apps panes.

chrome/browser/ui/webui/ntp/app_launcher_handler.h

 // Copyright (c) 2011 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_UI_WEBUI_NTP_APP_LAUNCHER_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_NTP_APP_LAUNCHER_HANDLER_H_
 #pragma once
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/cancelable_request.h"
 #include "chrome/browser/extensions/extension_install_ui.h"
 #include "chrome/browser/extensions/extension_uninstall_dialog.h"
 #include "chrome/browser/favicon/favicon_service.h"
 #include "chrome/browser/prefs/pref_change_registrar.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "chrome/common/string_ordinal.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/web_ui_message_handler.h"
 
 class AppNotification;
 class ExtensionService;
+class ExtensionSet;
 class PrefChangeRegistrar;
 class Profile;
 
 // The handler for Javascript messages related to the "apps" view.
 class AppLauncherHandler : public content::WebUIMessageHandler,
                            public ExtensionUninstallDialog::Delegate,
                            public ExtensionInstallUI::Delegate,
                            public content::NotificationObserver {
  public:
   explicit AppLauncherHandler(ExtensionService* extension_service);
@@ skipping 11 matching lines @@
       base::DictionaryValue* value);
 
   // WebUIMessageHandler implementation.
   virtual void RegisterMessages() OVERRIDE;
 
   // content::NotificationObserver
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
+  // Remove ordinals or page indices from legacy profiles.
+  void RemoveNonAppExtensionOrdinals(const ExtensionSet* extensions);
+
   // Populate the given dictionary with all installed app info.
   void FillAppDictionary(base::DictionaryValue* value);
 
   // Create a dictionary value for the given extension. May return NULL, e.g. if
   // the given extension is not an app. If non-NULL, the caller assumes
   // ownership of the pointer.
   base::DictionaryValue* GetAppInfo(const Extension* extension);
 
   // Populate the given dictionary with the web store promo content.
   void FillPromoDictionary(base::DictionaryValue* value);
 
+  // Callback for the "deleteAppsPage" message. Takes a page index as the first
+  // and only argument.
+  void HandleDeleteEmptyAppsPage(const base::ListValue* args);
+
   // Callback for the "getApps" message.
   void HandleGetApps(const base::ListValue* args);
 
   // Callback for the "launchApp" message.
   void HandleLaunchApp(const base::ListValue* args);
 
   // Callback for the "setLaunchType" message.
   void HandleSetLaunchType(const base::ListValue* args);
 
   // Callback for the "uninstallApp" message.
   void HandleUninstallApp(const base::ListValue* args);
 
   // Callback for the "hideAppPromo" message.
   void HandleHideAppsPromo(const base::ListValue* args);
 
   // Callback for the "createAppShortcut" message.
   void HandleCreateAppShortcut(const base::ListValue* args);
 
   // Callback for the "reorderApps" message.
   void HandleReorderApps(const base::ListValue* args);
 
   // Callback for the "setPageIndex" message.
   void HandleSetPageIndex(const base::ListValue* args);
 
   // Callback for the "promoSeen" message.
   void HandlePromoSeen(const base::ListValue* args);
 
-  // Callback for the "saveAppPageName" message.
-  void HandleSaveAppPageName(const base::ListValue* args);
+  // Callback for the "saveAppsPageName" message.
+  void HandleSaveAppsPageName(const base::ListValue* args);
 
   // Callback for the "generateAppForLink" message.
   void HandleGenerateAppForLink(const base::ListValue* args);
 
   // Callback for the "recordAppLaunchByURL" message. Takes an escaped URL and a
   // launch source (integer), and if the URL represents an app, records the
   // action for UMA.
   void HandleRecordAppLaunchByURL(const base::ListValue* args);
 
   // Callback for "closeNotification" message.
   void HandleNotificationClose(const base::ListValue* args);
 
   // Callback for "setNotificationsDisabled" message.
   void HandleSetNotificationsDisabled(const base::ListValue* args);
 
   // Register app launcher preferences.
   static void RegisterUserPrefs(PrefService* pref_service);
 
  private:
   struct AppInstallInfo {
     AppInstallInfo();
     ~AppInstallInfo();
 
     bool is_bookmark_app;
     string16 title;
     GURL app_url;
     StringOrdinal page_ordinal;
   };
 
+  // Reset some instance flags we use to track the currently uninstalling app.
+  void CleanupAfterUninstall();
+
   // Records a web store launch in the appropriate histograms. |promo_active|
   // specifies if the web store promotion was active.
   static void RecordWebStoreLaunch(bool promo_active);
 
   // Records an app launch in the corresponding |bucket| of the app launch
   // histogram. |promo_active| specifies if the web store promotion was active.
   static void RecordAppLaunchByID(extension_misc::AppLaunchBucket bucket);
 
   // Records an app launch in the corresponding |bucket| of the app launch
   // histogram if the |escaped_url| corresponds to an installed app.
@@ skipping 20 matching lines @@
   // needed.
   ExtensionInstallUI* GetExtensionInstallUI();
 
   // Helper that uninstalls all the default apps.
   void UninstallDefaultApps();
 
   // Continuation for installing a bookmark app after favicon lookup.
   void OnFaviconForApp(FaviconService::Handle handle,
                        history::FaviconData data);
 
+  // Ask all the apps which page they're on and return a sorted, unique list.
+  std::vector<std::string>* PageOrdinalsFromApps();
+
   // Sends |highlight_app_id_| to the js.
   void SetAppToBeHighlighted();
 
+  // Go over the existing preference we read from the profile and make sure
+  // every page ordinal is in it (and remove possible extras). Returns a bool
+  // telling the caller whether any values were changed in this method.
+  bool SyncPageNamesToApps(DictionaryValue* page_names);
+
   // The apps are represented in the extensions model, which
   // outlives us since it's owned by our containing profile.
   ExtensionService* const extension_service_;
 
   // We monitor changes to the extension system so that we can reload the apps
   // when necessary.
   content::NotificationRegistrar registrar_;
 
   // Monitor extension preference changes so that the Web UI can be notified.
   PrefChangeRegistrar pref_change_registrar_;
@@ skipping 16 matching lines @@
   bool attempted_bookmark_app_install_;
 
   // True if we have executed HandleGetApps() at least once.
   bool has_loaded_apps_;
 
   // The ID of the app to be highlighted on the NTP (i.e. shown on the page
   // and pulsed). This is done for new installs. The actual higlighting occurs
   // when the app is added to the page (via getAppsCallback or appAdded).
   std::string highlight_app_id_;
 
+  // Used to determine if the current instance of AppLauncherHandler called
+  // ExtensionUninstallAccepted(). If the current one was the one that called
+  // this, we use this value to animate the removal on the attached NTP.
+  bool uninstall_from_page_;
+
   // Hold state for favicon requests.
   CancelableRequestConsumerTSimple<AppInstallInfo*> favicon_consumer_;
 
   DISALLOW_COPY_AND_ASSIGN(AppLauncherHandler);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_NTP_APP_LAUNCHER_HANDLER_H_