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+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Jetpack.
+ *
+ * The Initial Developer of the Original Code is Mozilla.
+ * Portions created by the Initial Developer are Copyright (C) 2007
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ * Atul Varma <atul@mozilla.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+// This is the first code that's ever run in a Jetpack process. It sets up
+// infrastructure and receivers needed to start a Jetpack-based addon
+// in a separate process.
+
+// A list of scripts to inject into all new CommonJS module sandboxes.
+var injectedSandboxScripts = [];
+
+// A table of all CommonJS modules currently loaded.
+var modules = {};
+
+// This object represents the chrome process, and can be used to
+// communicate with it.
+var chrome = {
+ createHandle: function() {
+ return createHandle();
+ },
+ on: function(type, listener) {
+ registerReceiver(type, listener);
+ },
+ removeListener: function(type, listener) {
+ unregisterReceiver(type, listener);
+ },
+ send: function(type) {
+ sendMessage.apply(this, arguments);
+ },
+ call: function(name) {
+ var result = callMessage.apply(this, arguments);
+
+ if (result.length > 1)
+ throw new Error("More than one result received for call '" + name +
+ "': " + result.length);
+
+ if (result.length == 0)
+ throw new Error("No receiver registered for call '" + name + "'");
+
+ if (result[0].exception) {
+ throw Object.create(Error.prototype, {
+ message: { value: result[0].exception.message, enumerable: true },
+ fileName: { value: result[0].exception.fileName, enumerable: true },
+ lineNumber: { value: result[0].exception.lineNumber, enumerable: true },
+ // Concatenate the stack from the other process with one from this
+ // process, so callers have access to the full stack.
+ stack: { value: result[0].exception.stack + (new Error()).stack,
+ enumerable: true }
+ });
+ }
+
+ return result[0].returnValue;
+ }
+};
+
+// Use this for really low-level debugging of this script.
+function dump(msg) {
+ // Don't use chrome.send() to avoid infinite recursion when
+ // debugging chrome.send() itself.
+ sendMessage("dump", msg);
+}
+
+// Taken from plain-text-console.js.
+function stringify(arg) {
+ try {
+ return String(arg);
+ }
+ catch(ex) {
+ return "<toString() error>";
+ }
+}
+
+// Set up our "proxy" objects that just send messages to our parent
+// process to do the real work.
+var console = {
+ exception: function(e) {
+ chrome.send('console:exception', e);
+ },
+ trace: function() {
+ chrome.send('console:trace', new Error());
+ }
+};
+
+['log', 'debug', 'info', 'warn', 'error'].forEach(function(method) {
+ console[method] = function() {
+ chrome.send('console:' + method, Array.map(arguments, stringify));
+ }
+});
+
+var memory = {
+ track: function() {
+ /* TODO */
+ }
+};
+
+function makeRequire(base) {
+ var resolvedNames = {};
+
+ function require(name) {
+ // first, have we already require()d this name from this base? Just
+ // re-use the module
+ if (name && name in resolvedNames)
+ return resolvedNames[name].exports;
+
+ // if not, resolve relative import names by asking the browser-process
+ // side for the URL/filename of the module this points to
+ var response = chrome.call("require", base, name);
+ switch (response.code) {
+ case "not-found":
+ throw new Error("Unknown module '" + name + "'.");
+ case "access-denied":
+ throw new Error("Module '" + name + "' requires chrome privileges " +
+ "and has no e10s adapter.");
+ case "error":
+ throw new Error("An unexpected error occurred in the chrome " +
+ "process.");
+ case "ok":
+ break;
+ default:
+ throw new Error("Internal error: unknown response code '" +
+ response.code + "'");
+ };
+
+ // do we already have a module for this filename?
+ if (response.script.filename in modules) {
+ module = resolvedNames[name] = modules[response.script.filename];
+ return module.exports;
+ }
+
+ var module = createSandbox();
+
+ function injectScript(script) {
+ evalInSandbox(module, '//@line 1 "' + script.filename +
+ '"\n' + script.contents);
+ }
+
+ injectedSandboxScripts.forEach(injectScript);
+
+ modules[response.script.filename] = resolvedNames[name] = module;
+
+ // Set up the globals of the sandbox.
+ module.exports = {};
+ module.console = console;
+ module.memory = memory;
+ module.require = makeRequire(response.script.filename);
+ module.__url__ = response.script.filename;
+
+ if (response.needsMessaging)
+ module.chrome = chrome;
+
+ injectScript(response.script);
+
+ return module.exports;
+ };
+ return require;
+}
+
+chrome.on(
+ "addInjectedSandboxScript",
+ function(name, script) {
+ injectedSandboxScripts.push(script);
+ });
+
+chrome.on(
+ "startMain",
+ function(name, mainName, options) {
+ var mainRequire = makeRequire(null);
+ var main = mainRequire(mainName);
+
+ var callbacks = {
+ quit: function quit(status) {
+ if (status === undefined)
+ status = "OK";
+ chrome.send("quit", status);
+ }
+ };
+
+ if ('main' in main)
+ main.main(options, callbacks);
+ });