chrome/browser/extensions/extension_web_ui.h

   1 // Copyright (c) 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_EXTENSIONS_EXTENSION_WEB_UI_H_
   6 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_WEB_UI_H_
   7
   8 #include <string>
   9
  10 #include "base/memory/scoped_ptr.h"
  11 #include "chrome/common/extensions/chrome_manifest_url_handlers.h"
  12 #include "components/favicon_base/favicon_callback.h"
  13 #include "content/public/browser/web_ui_controller.h"
  14
  15 class Profile;
  16
  17 namespace content {
  18 class BrowserContext;
  19 class WebContents;
  20 }
  21
  22 namespace extensions {
  23 class BookmarkManagerPrivateDragEventRouter;
  24 }
  25
  26 namespace user_prefs {
  27 class PrefRegistrySyncable;
  28 }
  29
  30 // This class implements WebUI for extensions and allows extensions to put UI in
  31 // the main tab contents area. For example, each extension can specify an
  32 // "options_page", and that page is displayed in the tab contents area and is
  33 // hosted by this class.
  34 class ExtensionWebUI : public content::WebUIController {
  35  public:
  36   static const char kExtensionURLOverrides[];
  37
  38   ExtensionWebUI(content::WebUI* web_ui, const GURL& url);
  39
  40   ~ExtensionWebUI() override;
  41
  42   virtual extensions::BookmarkManagerPrivateDragEventRouter*
  43       bookmark_manager_private_drag_event_router();
  44
  45   // BrowserURLHandler
  46   static bool HandleChromeURLOverride(GURL* url,
  47                                       content::BrowserContext* browser_context);
  48   static bool HandleChromeURLOverrideReverse(
  49       GURL* url, content::BrowserContext* browser_context);
  50
  51   // Register and unregister a dictionary of one or more overrides.
  52   // Page names are the keys, and chrome-extension: URLs are the values.
  53   // (e.g. { "newtab": "chrome-extension://<id>/my_new_tab.html" }
  54   static void RegisterChromeURLOverrides(Profile* profile,
  55       const extensions::URLOverrides::URLOverrideMap& overrides);
  56   static void UnregisterChromeURLOverrides(Profile* profile,
  57       const extensions::URLOverrides::URLOverrideMap& overrides);
  58   static void UnregisterChromeURLOverride(const std::string& page,
  59                                           Profile* profile,
  60                                           const base::Value* override);
  61
  62   // Called from BrowserPrefs
  63   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
  64
  65   // Get the favicon for the extension by getting an icon from the manifest.
  66   // Note. |callback| is always run asynchronously.
  67   static void GetFaviconForURL(
  68       Profile* profile,
  69       const GURL& page_url,
  70       const favicon_base::FaviconResultsCallback& callback);
  71
  72  private:
  73   // Unregister the specified override, and if it's the currently active one,
  74   // ensure that something takes its place.
  75   static void UnregisterAndReplaceOverride(const std::string& page,
  76                                            Profile* profile,
  77                                            base::ListValue* list,
  78                                            const base::Value* override);
  79
  80   // TODO(aa): This seems out of place. Why is it not with the event routers for
  81   // the other extension APIs?
  82   scoped_ptr<extensions::BookmarkManagerPrivateDragEventRouter>
  83       bookmark_manager_private_drag_event_router_;
  84
  85   // The URL this WebUI was created for.
  86   GURL url_;
  87 };
  88
  89 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_WEB_UI_H_