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/* 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/. */
// vim:set ts=2 sw=2 sts=2 et ft=javascript:
/**
* This file exports the JSMime code, polyfilling code as appropriate for use in
* Gecko.
*/
// Load the core MIME parser. Since it doesn't define EXPORTED_SYMBOLS, we must
// use the subscript loader instead.
Services.scriptloader.loadSubScript("resource:///modules/jsmime/jsmime.js");
var EXPORTED_SYMBOLS = ["jsmime"];
function bytesToString(buffer) {
var string = "";
for (var i = 0; i < buffer.length; i++) {
string += String.fromCharCode(buffer[i]);
}
return string;
}
// Our UTF-7 decoder.
function UTF7TextDecoder(options = {}, manager) {
this.manager = manager;
this.collectInput = "";
}
UTF7TextDecoder.prototype = {
// Since the constructor checked, this will only be called for UTF-7.
decode(input, options = {}) {
let more = "stream" in options ? options.stream : false;
// There are cases where this is called without input.
if (!input) {
return "";
}
this.collectInput += bytesToString(input);
if (more) {
return "";
}
return this.manager.utf7ToUnicode(this.collectInput);
},
};
/* exported MimeTextDecoder */
function MimeTextDecoder(charset, options) {
let manager = Cc["@mozilla.org/charset-converter-manager;1"].createInstance(
Ci.nsICharsetConverterManager
);
// The following will throw if the charset is unknown.
let newCharset = manager.getCharsetAlias(charset);
if (newCharset.toLowerCase() == "utf-7") {
return new UTF7TextDecoder(options, manager);
}
return new TextDecoder(newCharset, options);
}
// The following code loads custom MIME encoders.
var CATEGORY_NAME = "custom-mime-encoder";
Services.obs.addObserver(function (subject, topic, data) {
subject = subject.QueryInterface(Ci.nsISupportsCString).data;
if (data == CATEGORY_NAME) {
let url = Services.catMan.getCategoryEntry(CATEGORY_NAME, subject);
Services.scriptloader.loadSubScript(url, {}, "UTF-8");
}
}, "xpcom-category-entry-added");
for (let { data } of Services.catMan.enumerateCategory(CATEGORY_NAME)) {
let url = Services.catMan.getCategoryEntry(CATEGORY_NAME, data);
Services.scriptloader.loadSubScript(url, {}, "UTF-8");
}
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