Chrome OS "open with" picker allowing Web Intents

chrome/browser/extensions/extension_special_storage_policy.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/extensions/extension_special_storage_policy.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/stl_util.h"
+#include "base/utf_string_conversions.h"
 #include "chrome/browser/content_settings/cookie_settings.h"
 #include "chrome/common/content_settings.h"
 #include "chrome/common/content_settings_types.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/url_constants.h"
 #include "content/public/browser/browser_thread.h"
+#include "webkit/glue/web_intent_service_data.h"
 
 using content::BrowserThread;
 using extensions::APIPermission;
 
+namespace {
+
+// The default View action for Web Intents.
+const char kWebIntentViewAction[] = "http://webintents.org/view";

[benwells, 2012/08/30 08:09:03]

I think I saw this constant get declared in one of the content/ web intent files
recently. Can you use that?

[thorogood, 2012/08/31 01:27:32]

Done.

+
+// Does the specified extension support the passed Web Intent, |action|?
+bool ExtensionSupportsIntentAction(const extensions::Extension* extension,
+    const std::string& action) {
+  for (std::vector<webkit_glue::WebIntentServiceData>::const_iterator i =
+          extension->intents_services().begin();
+       i != extension->intents_services().end(); ++i) {
+    if (UTF16ToUTF8(i->action) == action)
+      return true;
+  }
+  return false;
+}
+
+}  // namespace
+
 ExtensionSpecialStoragePolicy::ExtensionSpecialStoragePolicy(
     CookieSettings* cookie_settings)
     : cookie_settings_(cookie_settings) {}
 
 ExtensionSpecialStoragePolicy::~ExtensionSpecialStoragePolicy() {}
 
 bool ExtensionSpecialStoragePolicy::IsStorageProtected(const GURL& origin) {
   if (origin.SchemeIs(chrome::kExtensionScheme))
     return true;
   base::AutoLock locker(lock_);
@@ skipping 26 matching lines @@
   for (size_t i = 0; i < entries.size(); ++i) {
     if (entries[i].setting == CONTENT_SETTING_SESSION_ONLY)
       return true;
   }
   return false;
 }
 
 bool ExtensionSpecialStoragePolicy::IsFileHandler(
     const std::string& extension_id) {
   base::AutoLock locker(lock_);
-  return file_handler_extensions_.ContainsExtension(extension_id);
+  return web_intent_extensions_.ContainsExtension(extension_id) ||
+      file_handler_extensions_.ContainsExtension(extension_id);
 }
 
 bool ExtensionSpecialStoragePolicy::NeedsProtection(
     const extensions::Extension* extension) {
   return extension->is_hosted_app() && !extension->from_bookmark();
 }
 
 const ExtensionSet* ExtensionSpecialStoragePolicy::ExtensionsProtectingOrigin(
     const GURL& origin) {
   base::AutoLock locker(lock_);
   return protected_apps_.ExtensionsContaining(origin);
 }
 
 void ExtensionSpecialStoragePolicy::GrantRightsForExtension(
     const extensions::Extension* extension) {
   DCHECK(extension);
+  const bool supports_intent_view = ExtensionSupportsIntentAction(
+      extension, kWebIntentViewAction);
   if (!NeedsProtection(extension) &&
       !extension->HasAPIPermission(
           APIPermission::kUnlimitedStorage) &&
       !extension->HasAPIPermission(
-          APIPermission::kFileBrowserHandler)) {
+          APIPermission::kFileBrowserHandler) &&
+      !supports_intent_view) {
     return;
   }
   {
     base::AutoLock locker(lock_);
     if (NeedsProtection(extension))
       protected_apps_.Add(extension);
     // FIXME: Does GrantRightsForExtension imply |extension| is installed?
     if (extension->is_app())
       installed_apps_.Add(extension);
     if (extension->HasAPIPermission(APIPermission::kUnlimitedStorage))
       unlimited_extensions_.Add(extension);
     if (extension->HasAPIPermission(
-            APIPermission::kFileBrowserHandler)) {
+            APIPermission::kFileBrowserHandler))
       file_handler_extensions_.Add(extension);
-    }
+    if (supports_intent_view)
+      web_intent_extensions_.Add(extension);
   }
   NotifyChanged();
 }
 
 void ExtensionSpecialStoragePolicy::RevokeRightsForExtension(
     const extensions::Extension* extension) {
   DCHECK(extension);
+  const bool supports_intent_view = ExtensionSupportsIntentAction(
+      extension, kWebIntentViewAction);
   if (!NeedsProtection(extension) &&
       !extension->HasAPIPermission(
           APIPermission::kUnlimitedStorage) &&
       !extension->HasAPIPermission(
-          APIPermission::kFileBrowserHandler)) {
+          APIPermission::kFileBrowserHandler) &&
+      !supports_intent_view) {
     return;
   }
   {
     base::AutoLock locker(lock_);
     if (NeedsProtection(extension))
       protected_apps_.Remove(extension);
     if (extension->is_app())
       installed_apps_.Remove(extension);
     if (extension->HasAPIPermission(APIPermission::kUnlimitedStorage))
       unlimited_extensions_.Remove(extension);
     if (extension->HasAPIPermission(APIPermission::kFileBrowserHandler))
       file_handler_extensions_.Remove(extension);
+    if (supports_intent_view)
+      web_intent_extensions_.Remove(extension);
   }
   NotifyChanged();
 }
 
 void ExtensionSpecialStoragePolicy::RevokeRightsForAllExtensions() {
   {
     base::AutoLock locker(lock_);
     protected_apps_.Clear();
     installed_apps_.Clear();
     unlimited_extensions_.Clear();
     file_handler_extensions_.Clear();
+    web_intent_extensions_.Clear();
   }
   NotifyChanged();
 }
 
 void ExtensionSpecialStoragePolicy::NotifyChanged() {
   if (!BrowserThread::CurrentlyOn(BrowserThread::IO)) {
     BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
         base::Bind(&ExtensionSpecialStoragePolicy::NotifyChanged, this));
     return;
   }
@@ skipping 51 matching lines @@
 
 void ExtensionSpecialStoragePolicy::SpecialCollection::Clear() {
   ClearCache();
   extensions_.Clear();
 }
 
 void ExtensionSpecialStoragePolicy::SpecialCollection::ClearCache() {
   STLDeleteValues(&cached_results_);
   cached_results_.clear();
 }