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 "base/scoped_observer.h"
  12 #include "content/public/browser/web_contents_observer.h"
  13 #include "extensions/browser/extension_registry_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 class ExtensionRegistry;
  27
  28 // Responsible for granting and revoking tab-specific permissions to extensions
  29 // with the activeTab or tabCapture permission.
  30 class ActiveTabPermissionGranter
  31     : public content::WebContentsObserver,
  32       public extensions::ExtensionRegistryObserver {
  33  public:
  34   ActiveTabPermissionGranter(content::WebContents* web_contents,
  35                              int tab_id,
  36                              Profile* profile);
  37   virtual ~ActiveTabPermissionGranter();
  38
  39   // If |extension| has the activeTab or tabCapture permission, grants
  40   // tab-specific permissions to it until the next page navigation or refresh.
  41   void GrantIfRequested(const Extension* extension);
  42
  43  private:
  44   // content::WebContentsObserver implementation.
  45   virtual void DidNavigateMainFrame(
  46       const content::LoadCommittedDetails& details,
  47       const content::FrameNavigateParams& params) OVERRIDE;
  48   virtual void WebContentsDestroyed(content::WebContents* web_contents)
  49       OVERRIDE;
  50
  51   // extensions::ExtensionRegistryObserver implementation.
  52   virtual void OnExtensionUnloaded(content::BrowserContext* browser_context,
  53                                    const Extension* extension,
  54                                    UnloadedExtensionInfo::Reason reason)
  55       OVERRIDE;
  56
  57   // Clears any tab-specific permissions for all extensions on |tab_id_| and
  58   // notifies renderers.
  59   void ClearActiveExtensionsAndNotify();
  60
  61   // The tab ID for this tab.
  62   int tab_id_;
  63
  64   // Extensions with the activeTab permission that have been granted
  65   // tab-specific permissions until the next navigation/refresh.
  66   ExtensionSet granted_extensions_;
  67
  68   // Listen to extension unloaded notifications.
  69   ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
  70       extension_registry_observer_;
  71
  72   DISALLOW_COPY_AND_ASSIGN(ActiveTabPermissionGranter);
  73 };
  74
  75 }  // namespace extensions
  76
  77 #endif  // CHROME_BROWSER_EXTENSIONS_ACTIVE_TAB_PERMISSION_GRANTER_H_