зеркало из https://github.com/mozilla/gecko-dev.git
116 строки
3.4 KiB
JavaScript
116 строки
3.4 KiB
JavaScript
// -*- Mode: js2; tab-width: 2; indent-tabs-mode: nil; js2-basic-offset: 2; js2-skip-preprocessor-directives: t; -*-
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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this.EXPORTED_SYMBOLS = ["JavaAddonManager"];
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const { classes: Cc, interfaces: Ci, utils: Cu } = Components; /*global Components */
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Cu.import("resource://gre/modules/Messaging.jsm"); /*global Messaging */
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Cu.import("resource://gre/modules/Services.jsm"); /*global Services */
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function resolveGeckoURI(uri) {
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if (!uri) {
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throw new Error("Can't resolve an empty uri");
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}
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if (uri.startsWith("chrome://")) {
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let registry = Cc['@mozilla.org/chrome/chrome-registry;1'].getService(Ci["nsIChromeRegistry"]);
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return registry.convertChromeURL(Services.io.newURI(uri, null, null)).spec;
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} else if (uri.startsWith("resource://")) {
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let handler = Services.io.getProtocolHandler("resource").QueryInterface(Ci.nsIResProtocolHandler);
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return handler.resolveURI(Services.io.newURI(uri, null, null));
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}
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return uri;
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}
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/**
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* A promise-based API
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*/
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let JavaAddonManager = Object.freeze({
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classInstanceFromFile: function(classname, filename) {
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if (!classname) {
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throw new Error("classname cannot be null");
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}
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if (!filename) {
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throw new Error("filename cannot be null");
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}
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return Messaging.sendRequestForResult({
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type: "JavaAddonManagerV1:Load",
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classname: classname,
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filename: resolveGeckoURI(filename)
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})
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.then((guid) => {
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if (!guid) {
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throw new Error("Internal error: guid should not be null");
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}
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return new JavaAddonV1({classname: classname, guid: guid});
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});
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}
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});
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function JavaAddonV1(options = {}) {
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if (!(this instanceof JavaAddonV1)) {
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return new JavaAddonV1(options);
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}
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if (!options.classname) {
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throw new Error("options.classname cannot be null");
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}
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if (!options.guid) {
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throw new Error("options.guid cannot be null");
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}
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this._classname = options.classname;
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this._guid = options.guid;
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this._loaded = true;
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this._listeners = {};
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}
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JavaAddonV1.prototype = Object.freeze({
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unload: function() {
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if (!this._loaded) {
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return;
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}
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Messaging.sendRequestForResult({
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type: "JavaAddonManagerV1:Unload",
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guid: this._guid
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})
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.then(() => {
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this._loaded = false;
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for (let listener of this._listeners) {
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// If we use this.removeListener, we prefix twice.
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Messaging.removeListener(listener);
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}
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this._listeners = {};
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});
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},
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_prefix: function(message) {
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let newMessage = Cu.cloneInto(message, {}, { cloneFunctions: false });
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newMessage.type = this._guid + ":" + message.type;
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return newMessage;
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},
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sendRequest: function(message) {
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return Messaging.sendRequest(this._prefix(message));
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},
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sendRequestForResult: function(message) {
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return Messaging.sendRequestForResult(this._prefix(message));
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},
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addListener: function(listener, message) {
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let prefixedMessage = this._guid + ":" + message;
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this._listeners[prefixedMessage] = listener;
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return Messaging.addListener(listener, prefixedMessage);
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},
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removeListener: function(message) {
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let prefixedMessage = this._guid + ":" + message;
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delete this._listeners[prefixedMessage];
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return Messaging.removeListener(prefixedMessage);
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}
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});
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