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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";
module.metadata = {
"stability": "stable"
};
const { Class } = require('./core/heritage');
const { ns } = require('./core/namespace');
const { pipe, stripListeners } = require('./event/utils');
const { connect, destroy, WorkerHost } = require('./content/utils');
const { Worker } = require('./content/worker');
const { Disposable } = require('./core/disposable');
const { EventTarget } = require('./event/target');
const { setListeners } = require('./event/core');
const { window } = require('./addon/window');
const { create: makeFrame, getDocShell } = require('./frame/utils');
const { contract } = require('./util/contract');
const { contract: loaderContract } = require('./content/loader');
const { Rules } = require('./util/rules');
const { merge } = require('./util/object');
const { uuid } = require('./util/uuid');
const { useRemoteProcesses, remoteRequire, frames } = require("./remote/parent");
remoteRequire("sdk/content/page-worker");
const workers = new WeakMap();
const pages = new Map();
const internal = ns();
let workerFor = (page) => workers.get(page);
let isDisposed = (page) => !pages.has(internal(page).id);
// The frame is used to ensure we have a remote process to load workers in
let remoteFrame = null;
let framePromise = null;
function getFrame() {
if (framePromise)
return framePromise;
framePromise = new Promise(resolve => {
let view = makeFrame(window.document, {
namespaceURI: "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul",
nodeName: "iframe",
type: "content",
remote: useRemoteProcesses,
uri: "about:blank"
});
// Wait for the remote side to connect
let listener = (frame) => {
if (frame.frameElement != view)
return;
frames.off("attach", listener);
remoteFrame = frame;
resolve(frame);
}
frames.on("attach", listener);
});
return framePromise;
}
var pageContract = contract(merge({
allow: {
is: ['object', 'undefined', 'null'],
map: function (allow) { return { script: !allow || allow.script !== false }}
},
onMessage: {
is: ['function', 'undefined']
},
include: {
is: ['string', 'array', 'regexp', 'undefined']
},
contentScriptWhen: {
is: ['string', 'undefined'],
map: (when) => when || "end"
}
}, loaderContract.rules));
function enableScript (page) {
getDocShell(viewFor(page)).allowJavascript = true;
}
function disableScript (page) {
getDocShell(viewFor(page)).allowJavascript = false;
}
function Allow (page) {
return {
get script() {
return internal(page).options.allow.script;
},
set script(value) {
internal(page).options.allow.script = value;
if (isDisposed(page))
return;
remoteFrame.port.emit("sdk/frame/set", internal(page).id, { allowScript: value });
}
};
}
function isValidURL(page, url) {
return !page.rules || page.rules.matchesAny(url);
}
const Page = Class({
implements: [
EventTarget,
Disposable
],
extends: WorkerHost(workerFor),
setup: function Page(options) {
options = pageContract(options);
// Sanitize the options
if ("contentScriptOptions" in options)
options.contentScriptOptions = JSON.stringify(options.contentScriptOptions);
internal(this).id = uuid().toString();
internal(this).options = options;
for (let prop of ['contentScriptFile', 'contentScript', 'contentScriptWhen']) {
this[prop] = options[prop];
}
pages.set(internal(this).id, this);
// Set listeners on the {Page} object itself, not the underlying worker,
// like `onMessage`, as it gets piped
setListeners(this, options);
let worker = new Worker(stripListeners(options));
workers.set(this, worker);
pipe(worker, this);
if (options.include) {
this.rules = Rules();
this.rules.add.apply(this.rules, [].concat(options.include));
}
getFrame().then(frame => {
if (isDisposed(this))
return;
frame.port.emit("sdk/frame/create", internal(this).id, stripListeners(options));
});
},
get allow() { return Allow(this); },
set allow(value) {
if (isDisposed(this))
return;
this.allow.script = pageContract({ allow: value }).allow.script;
},
get contentURL() {
return internal(this).options.contentURL;
},
set contentURL(value) {
if (!isValidURL(this, value))
return;
internal(this).options.contentURL = value;
if (isDisposed(this))
return;
remoteFrame.port.emit("sdk/frame/set", internal(this).id, { contentURL: value });
},
dispose: function () {
if (isDisposed(this))
return;
pages.delete(internal(this).id);
let worker = workerFor(this);
if (worker)
destroy(worker);
remoteFrame.port.emit("sdk/frame/destroy", internal(this).id);
// Destroy the remote frame if all the pages have been destroyed
if (pages.size == 0) {
framePromise = null;
remoteFrame.frameElement.remove();
remoteFrame = null;
}
},
toString: function () { return '[object Page]' }
});
exports.Page = Page;
frames.port.on("sdk/frame/connect", (frame, id, params) => {
let page = pages.get(id);
if (!page)
return;
connect(workerFor(page), frame, params);
});
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