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 "chrome/common/extensions/extension_set.h"
12#include "content/public/browser/notification_observer.h"
13#include "content/public/browser/notification_registrar.h"
14#include "content/public/browser/web_contents_observer.h"
15#include "extensions/common/url_pattern_set.h"
16
17class Profile;
18
19namespace content {
20class WebContents;
21}
22
23namespace extensions {
24
25class Extension;
26
27// Responsible for granting and revoking tab-specific permissions to extensions
28// with the activeTab or tabCapture permission.
29class 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  // Returns true if |extension| has been granted tab-specific permissions
42  // for this tab.
43  bool IsGranted(const Extension* extension);
44
45 private:
46  // content::WebContentsObserver implementation.
47  virtual void DidNavigateMainFrame(
48      const content::LoadCommittedDetails& details,
49      const content::FrameNavigateParams& params) OVERRIDE;
50  virtual void WebContentsDestroyed(content::WebContents* web_contents)
51      OVERRIDE;
52
53  // content::NotificationObserver implementation.
54  virtual void Observe(int type,
55                       const content::NotificationSource& source,
56                       const content::NotificationDetails& details) OVERRIDE;
57
58  // Clears any tab-specific permissions for all extensions on |tab_id_| and
59  // notifies renderers.
60  void ClearActiveExtensionsAndNotify();
61
62  // Gets the current page id.
63  int32 GetPageID();
64
65  // The tab ID for this tab.
66  int tab_id_;
67
68  // Extensions with the activeTab permission that have been granted
69  // tab-specific permissions until the next navigation/refresh.
70  ExtensionSet granted_extensions_;
71
72  // Listen to extension unloaded notifications.
73  content::NotificationRegistrar registrar_;
74
75  DISALLOW_COPY_AND_ASSIGN(ActiveTabPermissionGranter);
76};
77
78}  // namespace extensions
79
80#endif  // CHROME_BROWSER_EXTENSIONS_ACTIVE_TAB_PERMISSION_GRANTER_H_
81