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      1 // Copyright 2013 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/common/extensions/sync_helper.h"
      6 
      7 #include "base/logging.h"
      8 #include "chrome/common/extensions/api/plugins/plugins_handler.h"
      9 #include "chrome/common/extensions/extension.h"
     10 #include "chrome/common/extensions/extension_constants.h"
     11 #include "chrome/common/extensions/manifest.h"
     12 #include "chrome/common/extensions/manifest_url_handler.h"
     13 
     14 namespace extensions {
     15 namespace sync_helper {
     16 
     17 namespace {
     18 
     19 enum SyncType {
     20   SYNC_TYPE_NONE = 0,
     21   SYNC_TYPE_EXTENSION,
     22   SYNC_TYPE_APP
     23 };
     24 
     25 SyncType GetSyncType(const Extension* extension) {
     26   if (!IsSyncable(extension)) {
     27     // We have a non-standard location.
     28     return SYNC_TYPE_NONE;
     29   }
     30 
     31   // Disallow extensions with non-gallery auto-update URLs for now.
     32   //
     33   // TODO(akalin): Relax this restriction once we've put in UI to
     34   // approve synced extensions.
     35   if (!ManifestURL::GetUpdateURL(extension).is_empty() &&
     36       !ManifestURL::UpdatesFromGallery(extension)) {
     37     return SYNC_TYPE_NONE;
     38   }
     39 
     40   // Disallow extensions with native code plugins.
     41   //
     42   // TODO(akalin): Relax this restriction once we've put in UI to
     43   // approve synced extensions.
     44   if (PluginInfo::HasPlugins(extension) ||
     45       extension->HasAPIPermission(APIPermission::kPlugin)) {
     46     return SYNC_TYPE_NONE;
     47   }
     48 
     49   switch (extension->GetType()) {
     50     case Manifest::TYPE_EXTENSION:
     51       return SYNC_TYPE_EXTENSION;
     52 
     53     case Manifest::TYPE_USER_SCRIPT:
     54       // We only want to sync user scripts with gallery update URLs.
     55       if (ManifestURL::UpdatesFromGallery(extension))
     56         return SYNC_TYPE_EXTENSION;
     57       return SYNC_TYPE_NONE;
     58 
     59     case Manifest::TYPE_HOSTED_APP:
     60     case Manifest::TYPE_LEGACY_PACKAGED_APP:
     61     case Manifest::TYPE_PLATFORM_APP:
     62       return SYNC_TYPE_APP;
     63 
     64     case Manifest::TYPE_UNKNOWN:
     65     // Confusingly, themes are actually synced.
     66     // TODO(yoz): Make this look less inconsistent.
     67     case Manifest::TYPE_THEME:
     68     case Manifest::TYPE_SHARED_MODULE:
     69       return SYNC_TYPE_NONE;
     70   }
     71   NOTREACHED();
     72   return SYNC_TYPE_NONE;
     73 }
     74 
     75 }  // namespace
     76 
     77 bool IsSyncable(const Extension* extension) {
     78   // TODO(akalin): Figure out if we need to allow some other types.
     79 
     80   // Default apps are not synced because otherwise they will pollute profiles
     81   // that don't already have them. Specially, if a user doesn't have default
     82   // apps, creates a new profile (which get default apps) and then enables sync
     83   // for it, then their profile everywhere gets the default apps.
     84   bool is_syncable = (extension->location() == Manifest::INTERNAL &&
     85                       !extension->was_installed_by_default());
     86   // Sync the chrome web store to maintain its position on the new tab page.
     87   is_syncable |= (extension->id() == extension_misc::kWebStoreAppId);
     88   // Sync the chrome component app to maintain its position on the app list.
     89   is_syncable |= (extension->id() == extension_misc::kChromeAppId);
     90   return is_syncable;
     91 }
     92 
     93 bool IsSyncableExtension(const Extension* extension) {
     94   return GetSyncType(extension) == SYNC_TYPE_EXTENSION;
     95 }
     96 
     97 bool IsSyncableApp(const Extension* extension) {
     98   return GetSyncType(extension) == SYNC_TYPE_APP;
     99 }
    100 
    101 }  // namespace sync_helper
    102 }  // namespace extensions
    103