83 lines
2.6 KiB
JavaScript
83 lines
2.6 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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'use strict';
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module.metadata = {
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'stability': 'unstable'
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};
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let { merge } = require('../util/object');
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let assetsURI = require('../self').data.url();
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let isArray = Array.isArray;
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let method = require('../../method/core');
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function isAddonContent({ contentURL }) {
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return typeof(contentURL) === 'string' && contentURL.indexOf(assetsURI) === 0;
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}
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exports.isAddonContent = isAddonContent;
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function hasContentScript({ contentScript, contentScriptFile }) {
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return (isArray(contentScript) ? contentScript.length > 0 :
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!!contentScript) ||
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(isArray(contentScriptFile) ? contentScriptFile.length > 0 :
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!!contentScriptFile);
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}
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exports.hasContentScript = hasContentScript;
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function requiresAddonGlobal(model) {
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return model.injectInDocument || (isAddonContent(model) && !hasContentScript(model));
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}
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exports.requiresAddonGlobal = requiresAddonGlobal;
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function getAttachEventType(model) {
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if (!model) return null;
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let when = model.contentScriptWhen;
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return requiresAddonGlobal(model) ? 'document-element-inserted' :
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when === 'start' ? 'document-element-inserted' :
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when === 'ready' ? 'DOMContentLoaded' :
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when === 'end' ? 'load' :
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null;
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}
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exports.getAttachEventType = getAttachEventType;
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let attach = method('worker-attach');
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exports.attach = attach;
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let detach = method('worker-detach');
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exports.detach = detach;
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let destroy = method('worker-destroy');
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exports.destroy = destroy;
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function WorkerHost (workerFor) {
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// Define worker properties that just proxy to underlying worker
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return ['postMessage', 'port', 'url', 'tab'].reduce(function(proto, name) {
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// Use descriptor properties instead so we can call
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// the worker function in the context of the worker so we
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// don't have to create new functions with `fn.bind(worker)`
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let descriptorProp = {
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value: function (...args) {
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let worker = workerFor(this);
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return worker[name].apply(worker, args);
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}
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};
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let accessorProp = {
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get: function () { return workerFor(this)[name]; },
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set: function (value) { workerFor(this)[name] = value; }
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};
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Object.defineProperty(proto, name, merge({
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enumerable: true,
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configurable: false,
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}, isDescriptor(name) ? descriptorProp : accessorProp));
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return proto;
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}, {});
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function isDescriptor (prop) {
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return ~['postMessage'].indexOf(prop);
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}
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}
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exports.WorkerHost = WorkerHost;
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