gecko-dev/b2g/components/FilePicker.js
Jim Blandy 7e20285e70 Bug 914753: Make Emacs file variable header lines correct, or at least consistent. DONTBUILD r=ehsan
The -*- file variable lines -*- establish per-file settings that Emacs will
pick up. This patch makes the following changes to those lines (and touches
nothing else):

 - Never set the buffer's mode.

   Years ago, Emacs did not have a good JavaScript mode, so it made sense
   to use Java or C++ mode in .js files. However, Emacs has had js-mode for
   years now; it's perfectly serviceable, and is available and enabled by
   default in all major Emacs packagings.

   Selecting a mode in the -*- file variable line -*- is almost always the
   wrong thing to do anyway. It overrides Emacs's default choice, which is
   (now) reasonable; and even worse, it overrides settings the user might
   have made in their '.emacs' file for that file extension. It's only
   useful when there's something specific about that particular file that
   makes a particular mode appropriate.

 - Correctly propagate settings that establish the correct indentation
   level for this file: c-basic-offset and js2-basic-offset should be
   js-indent-level. Whatever value they're given should be preserved;
   different parts of our tree use different indentation styles.

 - We don't use tabs in Mozilla JS code. Always set indent-tabs-mode: nil.
   Remove tab-width: settings, at least in files that don't contain tab
   characters.

 - Remove js2-mode settings that belong in the user's .emacs file, like
   js2-skip-preprocessor-directives.
2014-06-24 22:12:07 -07:00

223 lines
6.8 KiB
JavaScript

/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
* No magic constructor behaviour, as is de rigeur for XPCOM.
* If you must perform some initialization, and it could possibly fail (even
* due to an out-of-memory condition), you should use an Init method, which
* can convey failure appropriately (thrown exception in JS,
* NS_FAILED(nsresult) return in C++).
*
* In JS, you can actually cheat, because a thrown exception will cause the
* CreateInstance call to fail in turn, but not all languages are so lucky.
* (Though ANSI C++ provides exceptions, they are verboten in Mozilla code
* for portability reasons -- and even when you're building completely
* platform-specific code, you can't throw across an XPCOM method boundary.)
*/
const { classes: Cc, interfaces: Ci, utils: Cu, results: Cr } = Components;
// FIXME: improve this list of filters.
const IMAGE_FILTERS = ['image/gif', 'image/jpeg', 'image/pjpeg',
'image/png', 'image/svg+xml', 'image/tiff',
'image/vnd.microsoft.icon'];
const VIDEO_FILTERS = ['video/mpeg', 'video/mp4', 'video/ogg',
'video/quicktime', 'video/webm', 'video/x-matroska',
'video/x-ms-wmv', 'video/x-flv'];
const AUDIO_FILTERS = ['audio/basic', 'audio/L24', 'audio/mp4',
'audio/mpeg', 'audio/ogg', 'audio/vorbis',
'audio/vnd.rn-realaudio', 'audio/vnd.wave',
'audio/webm'];
Cu.import('resource://gre/modules/XPCOMUtils.jsm');
Cu.import("resource://gre/modules/osfile.jsm");
XPCOMUtils.defineLazyServiceGetter(this, 'cpmm',
'@mozilla.org/childprocessmessagemanager;1',
'nsIMessageSender');
function FilePicker() {
}
FilePicker.prototype = {
classID: Components.ID('{436ff8f9-0acc-4b11-8ec7-e293efba3141}'),
QueryInterface: XPCOMUtils.generateQI([Ci.nsIFilePicker]),
/* members */
mParent: undefined,
mExtraProps: undefined,
mFilterTypes: undefined,
mFileEnumerator: undefined,
mFilePickerShownCallback: undefined,
/* methods */
init: function(parent, title, mode) {
this.mParent = parent;
this.mExtraProps = {};
this.mFilterTypes = [];
this.mMode = mode;
if (mode != Ci.nsIFilePicker.modeOpen &&
mode != Ci.nsIFilePicker.modeOpenMultiple) {
throw Cr.NS_ERROR_NOT_IMPLEMENTED;
}
},
/* readonly attribute nsILocalFile file - not implemented; */
/* readonly attribute nsISimpleEnumerator files - not implemented; */
/* readonly attribute nsIURI fileURL - not implemented; */
get domfiles() {
return this.mFilesEnumerator;
},
get domfile() {
return this.mFilesEnumerator ? this.mFilesEnumerator.mFiles[0] : null;
},
get mode() {
return this.mMode;
},
appendFilters: function(filterMask) {
// Ci.nsIFilePicker.filterHTML is not supported
// Ci.nsIFilePicker.filterText is not supported
if (filterMask & Ci.nsIFilePicker.filterImages) {
this.mFilterTypes = this.mFilterTypes.concat(IMAGE_FILTERS);
// This property is needed for the gallery app pick activity.
this.mExtraProps['nocrop'] = true;
}
// Ci.nsIFilePicker.filterXML is not supported
// Ci.nsIFilePicker.filterXUL is not supported
// Ci.nsIFilePicker.filterApps is not supported
// Ci.nsIFilePicker.filterAllowURLs is not supported
if (filterMask & Ci.nsIFilePicker.filterVideo) {
this.mFilterTypes = this.mFilterTypes.concat(VIDEO_FILTERS);
}
if (filterMask & Ci.nsIFilePicker.filterAudio) {
this.mFilterTypes = this.mFilterTypes.concat(AUDIO_FILTERS);
}
if (filterMask & Ci.nsIFilePicker.filterAll) {
// This property is needed for the gallery app pick activity.
this.mExtraProps['nocrop'] = true;
}
},
appendFilter: function(title, extensions) {
// pick activity doesn't support extensions
},
open: function(aFilePickerShownCallback) {
this.mFilePickerShownCallback = aFilePickerShownCallback;
cpmm.addMessageListener('file-picked', this);
let detail = {};
if (this.mFilterTypes) {
detail.type = this.mFilterTypes;
}
for (let prop in this.mExtraProps) {
if (!(prop in detail)) {
detail[prop] = this.mExtraProps[prop];
}
}
cpmm.sendAsyncMessage('file-picker', detail);
},
fireSuccess: function(file) {
this.mFilesEnumerator = {
QueryInterface: XPCOMUtils.generateQI([Ci.nsISimpleEnumerator]),
mFiles: [file],
mIndex: 0,
hasMoreElements: function() {
return (this.mIndex < this.mFiles.length);
},
getNext: function() {
if (this.mIndex >= this.mFiles.length) {
throw Components.results.NS_ERROR_FAILURE;
}
return this.mFiles[this.mIndex++];
}
};
if (this.mFilePickerShownCallback) {
this.mFilePickerShownCallback.done(Ci.nsIFilePicker.returnOK);
this.mFilePickerShownCallback = null;
}
},
fireError: function() {
if (this.mFilePickerShownCallback) {
this.mFilePickerShownCallback.done(Ci.nsIFilePicker.returnCancel);
this.mFilePickerShownCallback = null;
}
},
receiveMessage: function(message) {
if (message.name !== 'file-picked') {
return;
}
cpmm.removeMessageListener('file-picked', this);
let data = message.data;
if (!data.success || !data.result.blob) {
this.fireError();
return;
}
// The name to be shown can be part of the message, or can be taken from
// the DOMFile (if the blob is a DOMFile).
let name = data.result.name;
if (!name &&
(data.result.blob instanceof this.mParent.File) &&
data.result.blob.name) {
name = data.result.blob.name;
}
// Let's try to remove the full path and take just the filename.
if (name) {
let names = OS.Path.split(name);
name = names.components[names.components.length - 1];
}
// the fallback is a filename composed by 'blob' + extension.
if (!name) {
name = 'blob';
if (data.result.blob.type) {
let mimeSvc = Cc["@mozilla.org/mime;1"].getService(Ci.nsIMIMEService);
let mimeInfo = mimeSvc.getFromTypeAndExtension(data.result.blob.type, '');
if (mimeInfo) {
name += '.' + mimeInfo.primaryExtension;
}
}
}
let file = new this.mParent.File(data.result.blob,
{ name: name,
type: data.result.blob.type });
if (file) {
this.fireSuccess(file);
} else {
this.fireError();
}
}
};
this.NSGetFactory = XPCOMUtils.generateNSGetFactory([FilePicker]);