| // Copyright 2012 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Custom binding for the Media Gallery API. |
| |
| var blobNatives = requireNative('blob_natives'); |
| var mediaGalleriesNatives = requireNative('mediaGalleries'); |
| |
| var blobsAwaitingMetadata = {}; |
| var mediaGalleriesMetadata = {}; |
| |
| function createFileSystemObjectsAndUpdateMetadata(response) { |
| var result = []; |
| mediaGalleriesMetadata = {}; // Clear any previous metadata. |
| if (response) { |
| for (var i = 0; i < response.length; i++) { |
| var filesystem = mediaGalleriesNatives.GetMediaFileSystemObject( |
| response[i].fsid); |
| $Array.push(result, filesystem); |
| var metadata = response[i]; |
| delete metadata.fsid; |
| mediaGalleriesMetadata[filesystem.name] = metadata; |
| } |
| } |
| return result; |
| } |
| |
| apiBridge.registerCustomHook(function(bindingsAPI, extensionId) { |
| var apiFunctions = bindingsAPI.apiFunctions; |
| |
| // getMediaFileSystems and addUserSelectedFolder use a custom callback so that |
| // they can instantiate and return an array of file system objects. |
| apiFunctions.setCustomCallback('getMediaFileSystems', |
| function(callback, response) { |
| var result = createFileSystemObjectsAndUpdateMetadata(response); |
| if (callback) |
| callback(result); |
| }); |
| |
| apiFunctions.setCustomCallback('addUserSelectedFolder', |
| function(callback, response) { |
| var fileSystems = []; |
| var selectedFileSystemName = ""; |
| if (response && 'mediaFileSystems' in response && |
| 'selectedFileSystemIndex' in response) { |
| fileSystems = createFileSystemObjectsAndUpdateMetadata( |
| response['mediaFileSystems']); |
| var selectedFileSystemIndex = response['selectedFileSystemIndex']; |
| if (selectedFileSystemIndex >= 0) { |
| selectedFileSystemName = fileSystems[selectedFileSystemIndex].name; |
| } |
| } |
| if (callback) |
| callback(fileSystems, selectedFileSystemName); |
| }); |
| |
| apiFunctions.setHandleRequest('getMediaFileSystemMetadata', |
| function(filesystem) { |
| if (filesystem && filesystem.name && |
| filesystem.name in mediaGalleriesMetadata) { |
| return mediaGalleriesMetadata[filesystem.name]; |
| } |
| return { |
| 'name': '', |
| 'galleryId': '', |
| 'isRemovable': false, |
| 'isMediaDevice': false, |
| 'isAvailable': false, |
| }; |
| }); |
| |
| function getMetadataCallback(uuid, callback, response, blobs) { |
| if (response && blobs) |
| response.metadata.attachedImages = blobs; |
| |
| if (callback) |
| callback(response ? response.metadata : null); |
| |
| delete blobsAwaitingMetadata[uuid]; |
| } |
| |
| apiFunctions.setHandleRequest('getMetadata', |
| function(mediaFile, options, callback) { |
| var blobUuid = blobNatives.GetBlobUuid(mediaFile) |
| // Store the blob in a global object to keep its refcount nonzero -- this |
| // prevents the object from being garbage collected before any metadata |
| // parsing gets to occur (see crbug.com/415792). |
| blobsAwaitingMetadata[blobUuid] = mediaFile; |
| |
| var optArgs = { |
| __proto__: null, |
| customCallback: $Function.bind(getMetadataCallback, null, blobUuid), |
| }; |
| |
| bindingUtil.sendRequest( |
| 'mediaGalleries.getMetadata', [blobUuid, options, callback], |
| optArgs); |
| }); |
| }); |