src/chrome/browser/extensions/active_tab_permission_granter.cc

   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 #include "chrome/browser/extensions/active_tab_permission_granter.h"
   6
   7 #include "chrome/browser/profiles/profile.h"
   8 #include "content/public/browser/navigation_details.h"
   9 #include "content/public/browser/navigation_entry.h"
  10 #include "content/public/browser/web_contents.h"
  11 #include "extensions/browser/extension_registry.h"
  12 #include "extensions/common/extension_messages.h"
  13 #include "extensions/common/permissions/permission_set.h"
  14 #include "extensions/common/permissions/permissions_data.h"
  15 #include "extensions/common/user_script.h"
  16
  17 using content::RenderProcessHost;
  18 using content::WebContentsObserver;
  19
  20 namespace extensions {
  21
  22 ActiveTabPermissionGranter::ActiveTabPermissionGranter(
  23     content::WebContents* web_contents,
  24     int tab_id,
  25     Profile* profile)
  26     : WebContentsObserver(web_contents),
  27       tab_id_(tab_id),
  28       extension_registry_observer_(this) {
  29   extension_registry_observer_.Add(ExtensionRegistry::Get(profile));
  30 }
  31
  32 ActiveTabPermissionGranter::~ActiveTabPermissionGranter() {}
  33
  34 void ActiveTabPermissionGranter::GrantIfRequested(const Extension* extension) {
  35   // Active tab grant request implies there was a user gesture.
  36   web_contents()->UserGestureDone();
  37
  38   if (granted_extensions_.Contains(extension->id()))
  39     return;
  40
  41   APIPermissionSet new_apis;
  42   URLPatternSet new_hosts;
  43
  44   if (extension->HasAPIPermission(APIPermission::kActiveTab)) {
  45     URLPattern pattern(UserScript::ValidUserScriptSchemes());
  46     // Pattern parsing could fail if this is an unsupported URL e.g. chrome://.
  47     if (pattern.Parse(web_contents()->GetURL().spec()) ==
  48             URLPattern::PARSE_SUCCESS) {
  49       new_hosts.AddPattern(pattern);
  50     }
  51     new_apis.insert(APIPermission::kTab);
  52   }
  53
  54   if (extension->HasAPIPermission(APIPermission::kTabCapture))
  55     new_apis.insert(APIPermission::kTabCaptureForTab);
  56
  57   if (!new_apis.empty() || !new_hosts.is_empty()) {
  58     granted_extensions_.Insert(extension);
  59     scoped_refptr<const PermissionSet> new_permissions =
  60         new PermissionSet(new_apis, ManifestPermissionSet(),
  61                           new_hosts, URLPatternSet());
  62     PermissionsData::UpdateTabSpecificPermissions(extension,
  63                                                   tab_id_,
  64                                                   new_permissions);
  65     const content::NavigationEntry* navigation_entry =
  66         web_contents()->GetController().GetVisibleEntry();
  67     if (navigation_entry) {
  68       Send(new ExtensionMsg_UpdateTabSpecificPermissions(
  69           navigation_entry->GetPageID(),
  70           tab_id_,
  71           extension->id(),
  72           new_hosts));
  73     }
  74   }
  75 }
  76
  77 void ActiveTabPermissionGranter::DidNavigateMainFrame(
  78     const content::LoadCommittedDetails& details,
  79     const content::FrameNavigateParams& params) {
  80   if (details.is_in_page)
  81     return;
  82   DCHECK(details.is_main_frame);  // important: sub-frames don't get granted!
  83   ClearActiveExtensionsAndNotify();
  84 }
  85
  86 void ActiveTabPermissionGranter::WebContentsDestroyed() {
  87   ClearActiveExtensionsAndNotify();
  88 }
  89
  90 void ActiveTabPermissionGranter::OnExtensionUnloaded(
  91     content::BrowserContext* browser_context,
  92     const Extension* extension,
  93     UnloadedExtensionInfo::Reason reason) {
  94   // Note: don't need to clear the permissions (nor tell the renderer about it)
  95   // because it's being unloaded anyway.
  96   granted_extensions_.Remove(extension->id());
  97 }
  98
  99 void ActiveTabPermissionGranter::ClearActiveExtensionsAndNotify() {
 100   if (granted_extensions_.is_empty())
 101     return;
 102
 103   std::vector<std::string> extension_ids;
 104
 105   for (ExtensionSet::const_iterator it = granted_extensions_.begin();
 106        it != granted_extensions_.end(); ++it) {
 107     PermissionsData::ClearTabSpecificPermissions(it->get(), tab_id_);
 108     extension_ids.push_back((*it)->id());
 109   }
 110
 111   Send(new ExtensionMsg_ClearTabSpecificPermissions(tab_id_, extension_ids));
 112   granted_extensions_.Clear();
 113 }
 114
 115 }  // namespace extensions