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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 "extensions/common/manifest_handlers/offline_enabled_info.h"
      6 
      7 #include "base/memory/scoped_ptr.h"
      8 #include "base/strings/string16.h"
      9 #include "base/strings/string_util.h"
     10 #include "base/strings/utf_string_conversions.h"
     11 #include "base/values.h"
     12 #include "extensions/common/manifest_constants.h"
     13 #include "extensions/common/manifest_handlers/permissions_parser.h"
     14 #include "extensions/common/permissions/api_permission_set.h"
     15 
     16 namespace extensions {
     17 
     18 namespace keys = manifest_keys;
     19 
     20 OfflineEnabledInfo::OfflineEnabledInfo(bool is_offline_enabled)
     21     : offline_enabled(is_offline_enabled) {
     22 }
     23 
     24 OfflineEnabledInfo::~OfflineEnabledInfo() {
     25 }
     26 
     27 // static
     28 bool OfflineEnabledInfo::IsOfflineEnabled(const Extension* extension) {
     29   OfflineEnabledInfo* info = static_cast<OfflineEnabledInfo*>(
     30       extension->GetManifestData(keys::kOfflineEnabled));
     31   return info ? info->offline_enabled : false;
     32 }
     33 
     34 OfflineEnabledHandler::OfflineEnabledHandler() {
     35 }
     36 
     37 OfflineEnabledHandler::~OfflineEnabledHandler() {
     38 }
     39 
     40 bool OfflineEnabledHandler::Parse(Extension* extension, base::string16* error) {
     41   if (!extension->manifest()->HasKey(keys::kOfflineEnabled)) {
     42     // Only platform apps are provided with a default offline enabled value.
     43     // A platform app is offline enabled unless it requests the webview
     44     // permission. That is, offline_enabled is true when there is NO webview
     45     // permission requested and false when webview permission is present.
     46     DCHECK(extension->is_platform_app());
     47 
     48     const bool has_webview_permission =
     49         PermissionsParser::HasAPIPermission(extension, APIPermission::kWebView);
     50     extension->SetManifestData(keys::kOfflineEnabled,
     51                                new OfflineEnabledInfo(!has_webview_permission));
     52     return true;
     53   }
     54 
     55   bool offline_enabled = false;
     56 
     57   if (!extension->manifest()->GetBoolean(keys::kOfflineEnabled,
     58                                          &offline_enabled)) {
     59     *error = base::ASCIIToUTF16(manifest_errors::kInvalidOfflineEnabled);
     60     return false;
     61   }
     62 
     63   extension->SetManifestData(keys::kOfflineEnabled,
     64                              new OfflineEnabledInfo(offline_enabled));
     65   return true;
     66 }
     67 
     68 bool OfflineEnabledHandler::AlwaysParseForType(Manifest::Type type) const {
     69   return type == Manifest::TYPE_PLATFORM_APP;
     70 }
     71 
     72 const std::vector<std::string> OfflineEnabledHandler::Keys() const {
     73   return SingleKey(keys::kOfflineEnabled);
     74 }
     75 
     76 }  // namespace extensions
     77