1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/b2g/components/FilePicker.js Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,222 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +/*
1.10 + * No magic constructor behaviour, as is de rigeur for XPCOM.
1.11 + * If you must perform some initialization, and it could possibly fail (even
1.12 + * due to an out-of-memory condition), you should use an Init method, which
1.13 + * can convey failure appropriately (thrown exception in JS,
1.14 + * NS_FAILED(nsresult) return in C++).
1.15 + *
1.16 + * In JS, you can actually cheat, because a thrown exception will cause the
1.17 + * CreateInstance call to fail in turn, but not all languages are so lucky.
1.18 + * (Though ANSI C++ provides exceptions, they are verboten in Mozilla code
1.19 + * for portability reasons -- and even when you're building completely
1.20 + * platform-specific code, you can't throw across an XPCOM method boundary.)
1.21 + */
1.22 +
1.23 +const { classes: Cc, interfaces: Ci, utils: Cu, results: Cr } = Components;
1.24 +
1.25 +// FIXME: improve this list of filters.
1.26 +const IMAGE_FILTERS = ['image/gif', 'image/jpeg', 'image/pjpeg',
1.27 + 'image/png', 'image/svg+xml', 'image/tiff',
1.28 + 'image/vnd.microsoft.icon'];
1.29 +const VIDEO_FILTERS = ['video/mpeg', 'video/mp4', 'video/ogg',
1.30 + 'video/quicktime', 'video/webm', 'video/x-matroska',
1.31 + 'video/x-ms-wmv', 'video/x-flv'];
1.32 +const AUDIO_FILTERS = ['audio/basic', 'audio/L24', 'audio/mp4',
1.33 + 'audio/mpeg', 'audio/ogg', 'audio/vorbis',
1.34 + 'audio/vnd.rn-realaudio', 'audio/vnd.wave',
1.35 + 'audio/webm'];
1.36 +
1.37 +Cu.import('resource://gre/modules/XPCOMUtils.jsm');
1.38 +Cu.import("resource://gre/modules/osfile.jsm");
1.39 +
1.40 +XPCOMUtils.defineLazyServiceGetter(this, 'cpmm',
1.41 + '@mozilla.org/childprocessmessagemanager;1',
1.42 + 'nsIMessageSender');
1.43 +
1.44 +function FilePicker() {
1.45 +}
1.46 +
1.47 +FilePicker.prototype = {
1.48 + classID: Components.ID('{436ff8f9-0acc-4b11-8ec7-e293efba3141}'),
1.49 + QueryInterface: XPCOMUtils.generateQI([Ci.nsIFilePicker]),
1.50 +
1.51 + /* members */
1.52 +
1.53 + mParent: undefined,
1.54 + mExtraProps: undefined,
1.55 + mFilterTypes: undefined,
1.56 + mFileEnumerator: undefined,
1.57 + mFilePickerShownCallback: undefined,
1.58 +
1.59 + /* methods */
1.60 +
1.61 + init: function(parent, title, mode) {
1.62 + this.mParent = parent;
1.63 + this.mExtraProps = {};
1.64 + this.mFilterTypes = [];
1.65 + this.mMode = mode;
1.66 +
1.67 + if (mode != Ci.nsIFilePicker.modeOpen &&
1.68 + mode != Ci.nsIFilePicker.modeOpenMultiple) {
1.69 + throw Cr.NS_ERROR_NOT_IMPLEMENTED;
1.70 + }
1.71 + },
1.72 +
1.73 + /* readonly attribute nsILocalFile file - not implemented; */
1.74 + /* readonly attribute nsISimpleEnumerator files - not implemented; */
1.75 + /* readonly attribute nsIURI fileURL - not implemented; */
1.76 +
1.77 + get domfiles() {
1.78 + return this.mFilesEnumerator;
1.79 + },
1.80 +
1.81 + get domfile() {
1.82 + return this.mFilesEnumerator ? this.mFilesEnumerator.mFiles[0] : null;
1.83 + },
1.84 +
1.85 + get mode() {
1.86 + return this.mMode;
1.87 + },
1.88 +
1.89 + appendFilters: function(filterMask) {
1.90 + // Ci.nsIFilePicker.filterHTML is not supported
1.91 + // Ci.nsIFilePicker.filterText is not supported
1.92 +
1.93 + if (filterMask & Ci.nsIFilePicker.filterImages) {
1.94 + this.mFilterTypes = this.mFilterTypes.concat(IMAGE_FILTERS);
1.95 + // This property is needed for the gallery app pick activity.
1.96 + this.mExtraProps['nocrop'] = true;
1.97 + }
1.98 +
1.99 + // Ci.nsIFilePicker.filterXML is not supported
1.100 + // Ci.nsIFilePicker.filterXUL is not supported
1.101 + // Ci.nsIFilePicker.filterApps is not supported
1.102 + // Ci.nsIFilePicker.filterAllowURLs is not supported
1.103 +
1.104 + if (filterMask & Ci.nsIFilePicker.filterVideo) {
1.105 + this.mFilterTypes = this.mFilterTypes.concat(VIDEO_FILTERS);
1.106 + }
1.107 +
1.108 + if (filterMask & Ci.nsIFilePicker.filterAudio) {
1.109 + this.mFilterTypes = this.mFilterTypes.concat(AUDIO_FILTERS);
1.110 + }
1.111 +
1.112 + if (filterMask & Ci.nsIFilePicker.filterAll) {
1.113 + // This property is needed for the gallery app pick activity.
1.114 + this.mExtraProps['nocrop'] = true;
1.115 + }
1.116 + },
1.117 +
1.118 + appendFilter: function(title, extensions) {
1.119 + // pick activity doesn't support extensions
1.120 + },
1.121 +
1.122 + open: function(aFilePickerShownCallback) {
1.123 + this.mFilePickerShownCallback = aFilePickerShownCallback;
1.124 +
1.125 + cpmm.addMessageListener('file-picked', this);
1.126 +
1.127 + let detail = {};
1.128 + if (this.mFilterTypes) {
1.129 + detail.type = this.mFilterTypes;
1.130 + }
1.131 +
1.132 + for (let prop in this.mExtraProps) {
1.133 + if (!(prop in detail)) {
1.134 + detail[prop] = this.mExtraProps[prop];
1.135 + }
1.136 + }
1.137 +
1.138 + cpmm.sendAsyncMessage('file-picker', detail);
1.139 + },
1.140 +
1.141 + fireSuccess: function(file) {
1.142 + this.mFilesEnumerator = {
1.143 + QueryInterface: XPCOMUtils.generateQI([Ci.nsISimpleEnumerator]),
1.144 +
1.145 + mFiles: [file],
1.146 + mIndex: 0,
1.147 +
1.148 + hasMoreElements: function() {
1.149 + return (this.mIndex < this.mFiles.length);
1.150 + },
1.151 +
1.152 + getNext: function() {
1.153 + if (this.mIndex >= this.mFiles.length) {
1.154 + throw Components.results.NS_ERROR_FAILURE;
1.155 + }
1.156 + return this.mFiles[this.mIndex++];
1.157 + }
1.158 + };
1.159 +
1.160 + if (this.mFilePickerShownCallback) {
1.161 + this.mFilePickerShownCallback.done(Ci.nsIFilePicker.returnOK);
1.162 + this.mFilePickerShownCallback = null;
1.163 + }
1.164 + },
1.165 +
1.166 + fireError: function() {
1.167 + if (this.mFilePickerShownCallback) {
1.168 + this.mFilePickerShownCallback.done(Ci.nsIFilePicker.returnCancel);
1.169 + this.mFilePickerShownCallback = null;
1.170 + }
1.171 + },
1.172 +
1.173 + receiveMessage: function(message) {
1.174 + if (message.name !== 'file-picked') {
1.175 + return;
1.176 + }
1.177 +
1.178 + cpmm.removeMessageListener('file-picked', this);
1.179 +
1.180 + let data = message.data;
1.181 + if (!data.success || !data.result.blob) {
1.182 + this.fireError();
1.183 + return;
1.184 + }
1.185 +
1.186 + // The name to be shown can be part of the message, or can be taken from
1.187 + // the DOMFile (if the blob is a DOMFile).
1.188 + let name = data.result.name;
1.189 + if (!name &&
1.190 + (data.result.blob instanceof this.mParent.File) &&
1.191 + data.result.blob.name) {
1.192 + name = data.result.blob.name;
1.193 + }
1.194 +
1.195 + // Let's try to remove the full path and take just the filename.
1.196 + if (name) {
1.197 + let names = OS.Path.split(name);
1.198 + name = names.components[names.components.length - 1];
1.199 + }
1.200 +
1.201 + // the fallback is a filename composed by 'blob' + extension.
1.202 + if (!name) {
1.203 + name = 'blob';
1.204 + if (data.result.blob.type) {
1.205 + let mimeSvc = Cc["@mozilla.org/mime;1"].getService(Ci.nsIMIMEService);
1.206 + let mimeInfo = mimeSvc.getFromTypeAndExtension(data.result.blob.type, '');
1.207 + if (mimeInfo) {
1.208 + name += '.' + mimeInfo.primaryExtension;
1.209 + }
1.210 + }
1.211 + }
1.212 +
1.213 + let file = new this.mParent.File(data.result.blob,
1.214 + { name: name,
1.215 + type: data.result.blob.type });
1.216 +
1.217 + if (file) {
1.218 + this.fireSuccess(file);
1.219 + } else {
1.220 + this.fireError();
1.221 + }
1.222 + }
1.223 +};
1.224 +
1.225 +this.NSGetFactory = XPCOMUtils.generateNSGetFactory([FilePicker]);
