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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);
});
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