gecko-dev/devtools/server/worker.js

121 строка
3.5 KiB
JavaScript

/* 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/. */
"use strict";
/* eslint-env mozilla/chrome-worker */
/* global worker, loadSubScript, global */
// This function is used to do remote procedure calls from the worker to the
// main thread. It is exposed as a built-in global to every module by the
// worker loader. To make sure the worker loader can access it, it needs to be
// defined before loading the worker loader script below.
this.rpc = function (method, ...params) {
let id = nextId++;
postMessage(JSON.stringify({
type: "rpc",
method: method,
params: params,
id: id
}));
let deferred = Promise.defer();
rpcDeferreds[id] = deferred;
return deferred.promise;
};
loadSubScript("resource://devtools/shared/worker/loader.js");
var Promise = worker.require("promise");
var { ActorPool } = worker.require("devtools/server/actors/common");
var { ThreadActor } = worker.require("devtools/server/actors/script");
var { WebConsoleActor } = worker.require("devtools/server/actors/webconsole");
var { TabSources } = worker.require("devtools/server/actors/utils/TabSources");
var makeDebugger = worker.require("devtools/server/actors/utils/make-debugger");
var { DebuggerServer } = worker.require("devtools/server/main");
DebuggerServer.init();
DebuggerServer.createRootActor = function () {
throw new Error("Should never get here!");
};
var connections = Object.create(null);
var nextId = 0;
var rpcDeferreds = [];
this.addEventListener("message", function (event) {
let packet = JSON.parse(event.data);
switch (packet.type) {
case "connect":
// Step 3: Create a connection to the parent.
let connection = DebuggerServer.connectToParent(packet.id, this);
connections[packet.id] = {
connection,
rpcs: []
};
// Step 4: Create a thread actor for the connection to the parent.
let pool = new ActorPool(connection);
connection.addActorPool(pool);
let sources = null;
let parent = {
actorID: packet.id,
makeDebugger: makeDebugger.bind(null, {
findDebuggees: () => {
return [this.global];
},
shouldAddNewGlobalAsDebuggee: () => {
return true;
},
}),
get sources() {
if (sources === null) {
sources = new TabSources(threadActor);
}
return sources;
},
window: global
};
let threadActor = new ThreadActor(parent, global);
pool.addActor(threadActor);
// parentActor.threadActor is needed from the webconsole for grip previewing
parent.threadActor = threadActor;
let consoleActor = new WebConsoleActor(connection, parent);
pool.addActor(consoleActor);
// Step 5: Send a response packet to the parent to notify
// it that a connection has been established.
postMessage(JSON.stringify({
type: "connected",
id: packet.id,
threadActor: threadActor.actorID,
consoleActor: consoleActor.actorID,
}));
break;
case "disconnect":
connections[packet.id].connection.close();
break;
case "rpc":
let deferred = rpcDeferreds[packet.id];
delete rpcDeferreds[packet.id];
if (packet.error) {
deferred.reject(packet.error);
}
deferred.resolve(packet.result);
break;
}
});