chrome/browser/extensions/navigation_observer.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_NAVIGATION_OBSERVER_H_
   6 #define CHROME_BROWSER_EXTENSIONS_NAVIGATION_OBSERVER_H_
   7
   8 #include <set>
   9 #include <string>
  10
  11 #include "base/memory/scoped_ptr.h"
  12 #include "chrome/browser/extensions/extension_install_prompt.h"
  13 #include "content/public/browser/notification_observer.h"
  14 #include "content/public/browser/notification_registrar.h"
  15
  16 class Profile;
  17
  18 namespace content {
  19 class NavigationController;
  20 }
  21
  22 namespace extensions {
  23
  24 // The NavigationObserver listens to navigation notifications. If the user
  25 // navigates into an extension that has been disabled due to a permission
  26 // increase, it prompts the user to accept the new permissions and re-enables
  27 // the extension.
  28 class NavigationObserver : public ExtensionInstallPrompt::Delegate,
  29                            public content::NotificationObserver {
  30  public:
  31   explicit NavigationObserver(Profile* profile);
  32   virtual ~NavigationObserver();
  33
  34   // content::NotificationObserver
  35   virtual void Observe(int type,
  36                        const content::NotificationSource& source,
  37                        const content::NotificationDetails& details) OVERRIDE;
  38  private:
  39   // Registers for the NOTIFICATION_NAV_ENTRY_COMMITTED notification.
  40   void RegisterForNotifications();
  41
  42   // Checks if |nav_controller| has entered an extension's web extent. If it
  43   // has and the extension is disabled due to a permissions increase, this
  44   // prompts the user to accept the new permissions and enables the extension.
  45   void PromptToEnableExtensionIfNecessary(
  46       content::NavigationController* nav_controller);
  47
  48   // ExtensionInstallPrompt::Delegate callbacks used for the permissions prompt.
  49   virtual void InstallUIProceed() OVERRIDE;
  50   virtual void InstallUIAbort(bool user_initiated) OVERRIDE;
  51
  52   content::NotificationRegistrar registrar_;
  53
  54   Profile* profile_;
  55
  56   // The UI used to confirm enabling extensions.
  57   scoped_ptr<ExtensionInstallPrompt> extension_install_prompt_;
  58
  59   // The data we keep track of when prompting to enable extensions.
  60   std::string in_progress_prompt_extension_id_;
  61   content::NavigationController* in_progress_prompt_navigation_controller_;
  62
  63   // The extension ids we've already prompted the user about.
  64   std::set<std::string> prompted_extensions_;
  65
  66   DISALLOW_COPY_AND_ASSIGN(NavigationObserver);
  67 };
  68
  69 }  // namespace extensions
  70
  71 #endif  // CHROME_BROWSER_EXTENSIONS_NAVIGATION_OBSERVER_H_