chrome/renderer/extensions/media_galleries_custom_bindings.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/renderer/extensions/media_galleries_custom_bindings.h"
   6
   7 #include <string>
   8
   9 #include "extensions/renderer/script_context.h"
  10 #include "storage/common/fileapi/file_system_util.h"
  11 #include "third_party/WebKit/public/web/WebDOMFileSystem.h"
  12 #include "third_party/WebKit/public/web/WebDocument.h"
  13 #include "third_party/WebKit/public/web/WebLocalFrame.h"
  14 #include "v8/include/v8.h"
  15
  16 namespace extensions {
  17
  18 namespace {
  19
  20 // FileSystemObject GetMediaFileSystem(string file_system_url): construct
  21 // a file system object from a file system url.
  22 void GetMediaFileSystemObject(const v8::FunctionCallbackInfo<v8::Value>& args) {
  23   CHECK_EQ(1, args.Length());
  24   CHECK(args[0]->IsString());
  25
  26   std::string fs_mount(*v8::String::Utf8Value(args[0]));
  27   CHECK(!fs_mount.empty());
  28
  29   blink::WebLocalFrame* webframe =
  30       blink::WebLocalFrame::frameForCurrentContext();
  31   const GURL origin = GURL(webframe->document().securityOrigin().toString());
  32   std::string fs_name =
  33       storage::GetFileSystemName(origin, storage::kFileSystemTypeExternal);
  34   fs_name.append("_");
  35   fs_name.append(fs_mount);
  36   const GURL root_url(
  37       storage::GetExternalFileSystemRootURIString(origin, fs_mount));
  38   args.GetReturnValue().Set(
  39       blink::WebDOMFileSystem::create(webframe,
  40                                       blink::WebFileSystemTypeExternal,
  41                                       blink::WebString::fromUTF8(fs_name),
  42                                       root_url)
  43           .toV8Value(args.Holder(), args.GetIsolate()));
  44 }
  45
  46 }  // namespace
  47
  48 MediaGalleriesCustomBindings::MediaGalleriesCustomBindings(
  49     ScriptContext* context)
  50     : ObjectBackedNativeHandler(context) {
  51   RouteFunction("GetMediaFileSystemObject",
  52                 base::Bind(&GetMediaFileSystemObject));
  53 }
  54
  55 }  // namespace extensions