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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/. */
"use strict";
const { XPCOMUtils } = ChromeUtils.importESModule(
"resource://gre/modules/XPCOMUtils.sys.mjs",
{ global: "contextual" }
);
loader.lazyRequireGetter(
this,
"WorkerDescriptorActor",
"resource://devtools/server/actors/descriptors/worker.js",
true
);
XPCOMUtils.defineLazyServiceGetter(
this,
"wdm",
"@mozilla.org/dom/workers/workerdebuggermanager;1",
"nsIWorkerDebuggerManager"
);
function matchWorkerDebugger(dbg, options) {
if ("type" in options && dbg.type !== options.type) {
return false;
}
if ("window" in options) {
let window = dbg.window;
while (window !== null && window.parent !== window) {
window = window.parent;
}
if (window !== options.window) {
return false;
}
}
return true;
}
function matchServiceWorker(dbg, origin) {
return (
dbg.type == Ci.nsIWorkerDebugger.TYPE_SERVICE &&
new URL(dbg.url).origin == origin
);
}
// When a new worker appears, in some cases (i.e. the debugger is running) we
// want it to pause during registration until a later time (i.e. the debugger
// finishes attaching to the worker). This is an optional WorkderDebuggerManager
// listener that can be installed in addition to the WorkerDescriptorActorList
// listener. It always listens to new workers and pauses any matching filters
// which have been set on it.
//
// Two kinds of filters are supported:
//
// setPauseMatching(true) will pause all workers which match the options strcut
// passed in on creation.
//
// setPauseServiceWorkers(origin) will pause all service workers which have the
// specified origin.
//
// FIXME Bug 1601279 separate WorkerPauser from WorkerDescriptorActorList and give
// it a more consistent interface.
class WorkerPauser {
constructor(options) {
this._options = options;
this._pauseMatching = null;
this._pauseServiceWorkerOrigin = null;
this.onRegister = this._onRegister.bind(this);
this.onUnregister = () => {};
wdm.addListener(this);
}
destroy() {
wdm.removeListener(this);
}
_onRegister(dbg) {
if (
(this._pauseMatching && matchWorkerDebugger(dbg, this._options)) ||
(this._pauseServiceWorkerOrigin &&
matchServiceWorker(dbg, this._pauseServiceWorkerOrigin))
) {
// Prevent the debuggee from executing in this worker until the debugger
// has finished attaching to it.
dbg.setDebuggerReady(false);
}
}
setPauseMatching(shouldPause) {
this._pauseMatching = shouldPause;
}
setPauseServiceWorkers(origin) {
this._pauseServiceWorkerOrigin = origin;
}
}
class WorkerDescriptorActorList {
constructor(conn, options) {
this._conn = conn;
this._options = options;
this._actors = new Map();
this._onListChanged = null;
this._workerPauser = null;
this._mustNotify = false;
this.onRegister = this.onRegister.bind(this);
this.onUnregister = this.onUnregister.bind(this);
}
destroy() {
this.onListChanged = null;
if (this._workerPauser) {
this._workerPauser.destroy();
this._workerPauser = null;
}
}
getList() {
// Create a set of debuggers.
const dbgs = new Set();
for (const dbg of wdm.getWorkerDebuggerEnumerator()) {
if (matchWorkerDebugger(dbg, this._options)) {
dbgs.add(dbg);
}
}
// Delete each actor for which we don't have a debugger.
for (const [dbg] of this._actors) {
if (!dbgs.has(dbg)) {
this._actors.delete(dbg);
}
}
// Create an actor for each debugger for which we don't have one.
for (const dbg of dbgs) {
if (!this._actors.has(dbg)) {
this._actors.set(dbg, new WorkerDescriptorActor(this._conn, dbg));
}
}
const actors = [];
for (const [, actor] of this._actors) {
actors.push(actor);
}
if (!this._mustNotify) {
if (this._onListChanged !== null) {
wdm.addListener(this);
}
this._mustNotify = true;
}
return Promise.resolve(actors);
}
get onListChanged() {
return this._onListChanged;
}
set onListChanged(onListChanged) {
if (typeof onListChanged !== "function" && onListChanged !== null) {
throw new Error("onListChanged must be either a function or null.");
}
if (onListChanged === this._onListChanged) {
return;
}
if (this._mustNotify) {
if (this._onListChanged === null && onListChanged !== null) {
wdm.addListener(this);
}
if (this._onListChanged !== null && onListChanged === null) {
wdm.removeListener(this);
}
}
this._onListChanged = onListChanged;
}
_notifyListChanged() {
this._onListChanged();
if (this._onListChanged !== null) {
wdm.removeListener(this);
}
this._mustNotify = false;
}
onRegister(dbg) {
if (matchWorkerDebugger(dbg, this._options)) {
this._notifyListChanged();
}
}
onUnregister(dbg) {
if (matchWorkerDebugger(dbg, this._options)) {
this._notifyListChanged();
}
}
get workerPauser() {
if (!this._workerPauser) {
this._workerPauser = new WorkerPauser(this._options);
}
return this._workerPauser;
}
}
exports.WorkerDescriptorActorList = WorkerDescriptorActorList;
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