chrome/browser/extensions/active_tab_permission_granter.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_ACTIVE_TAB_PERMISSION_GRANTER_H_
   6 #define CHROME_BROWSER_EXTENSIONS_ACTIVE_TAB_PERMISSION_GRANTER_H_
   7
   8 #include <set>
   9 #include <string>
  10
  11 #include "content/public/browser/notification_observer.h"
  12 #include "content/public/browser/notification_registrar.h"
  13 #include "content/public/browser/web_contents_observer.h"
  14 #include "extensions/common/extension_set.h"
  15 #include "extensions/common/url_pattern_set.h"
  16
  17 class Profile;
  18
  19 namespace content {
  20 class WebContents;
  21 }
  22
  23 namespace extensions {
  24
  25 class Extension;
  26
  27 // Responsible for granting and revoking tab-specific permissions to extensions
  28 // with the activeTab or tabCapture permission.
  29 class ActiveTabPermissionGranter : public content::WebContentsObserver,
  30                                    public content::NotificationObserver {
  31  public:
  32   ActiveTabPermissionGranter(content::WebContents* web_contents,
  33                              int tab_id,
  34                              Profile* profile);
  35   virtual ~ActiveTabPermissionGranter();
  36
  37   // If |extension| has the activeTab or tabCapture permission, grants
  38   // tab-specific permissions to it until the next page navigation or refresh.
  39   void GrantIfRequested(const Extension* extension);
  40
  41  private:
  42   // content::WebContentsObserver implementation.
  43   virtual void DidNavigateMainFrame(
  44       const content::LoadCommittedDetails& details,
  45       const content::FrameNavigateParams& params) OVERRIDE;
  46   virtual void WebContentsDestroyed(content::WebContents* web_contents)
  47       OVERRIDE;
  48
  49   // content::NotificationObserver implementation.
  50   virtual void Observe(int type,
  51                        const content::NotificationSource& source,
  52                        const content::NotificationDetails& details) OVERRIDE;
  53
  54   // Clears any tab-specific permissions for all extensions on |tab_id_| and
  55   // notifies renderers.
  56   void ClearActiveExtensionsAndNotify();
  57
  58   // The tab ID for this tab.
  59   int tab_id_;
  60
  61   // Extensions with the activeTab permission that have been granted
  62   // tab-specific permissions until the next navigation/refresh.
  63   ExtensionSet granted_extensions_;
  64
  65   // Listen to extension unloaded notifications.
  66   content::NotificationRegistrar registrar_;
  67
  68   DISALLOW_COPY_AND_ASSIGN(ActiveTabPermissionGranter);
  69 };
  70
  71 }  // namespace extensions
  72
  73 #endif  // CHROME_BROWSER_EXTENSIONS_ACTIVE_TAB_PERMISSION_GRANTER_H_