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
16class Profile;
17
18namespace content {
19class NavigationController;
20}
21
22namespace 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.
28class 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_
72