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Diffstat (limited to 'tools/addon-sdk-1.7/packages/api-utils/lib/content/symbiont.js')
| -rw-r--r-- | tools/addon-sdk-1.7/packages/api-utils/lib/content/symbiont.js | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/tools/addon-sdk-1.7/packages/api-utils/lib/content/symbiont.js b/tools/addon-sdk-1.7/packages/api-utils/lib/content/symbiont.js new file mode 100644 index 0000000..e7c959c --- /dev/null +++ b/tools/addon-sdk-1.7/packages/api-utils/lib/content/symbiont.js @@ -0,0 +1,183 @@ +/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim:set ts=2 sw=2 sts=2 et: */ +/* 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 { Worker } = require('./worker'); +const { Loader } = require('./loader'); +const hiddenFrames = require('../hidden-frame'); +const observers = require('../observer-service'); +const unload = require('../unload'); + +/** + * This trait is layered on top of `Worker` and in contrast to symbiont + * Worker constructor requires `content` option that represents content + * that will be loaded in the provided frame, if frame is not provided + * Worker will create hidden one. + */ +const Symbiont = Worker.resolve({ + constructor: '_initWorker', + destroy: '_workerDestroy' + }).compose(Loader, { + + /** + * The constructor requires all the options that are required by + * `require('content').Worker` with the difference that the `frame` option + * is optional. If `frame` is not provided, `contentURL` is expected. + * @param {Object} options + * @param {String} options.contentURL + * URL of a content to load into `this._frame` and create worker for. + * @param {Element} [options.frame] + * iframe element that is used to load `options.contentURL` into. + * if frame is not provided hidden iframe will be created. + */ + constructor: function Symbiont(options) { + options = options || {}; + + if ('contentURL' in options) + this.contentURL = options.contentURL; + if ('contentScriptWhen' in options) + this.contentScriptWhen = options.contentScriptWhen; + if ('contentScriptFile' in options) + this.contentScriptFile = options.contentScriptFile; + if ('contentScript' in options) + this.contentScript = options.contentScript; + if ('allow' in options) + this.allow = options.allow; + if ('onError' in options) + this.on('error', options.onError); + if ('onMessage' in options) + this.on('message', options.onMessage); + if ('frame' in options) { + this._initFrame(options.frame); + } + else { + let self = this; + this._hiddenFrame = hiddenFrames.HiddenFrame({ + onReady: function onFrame() { + self._initFrame(this.element); + } + }); + hiddenFrames.add(this._hiddenFrame); + } + + unload.ensure(this._public, "destroy"); + }, + + destroy: function destroy() { + this._workerDestroy(); + this._unregisterListener(); + this._frame = null; + if (this._hiddenFrame) { + hiddenFrames.remove(this._hiddenFrame); + this._hiddenFrame = null; + } + }, + + /** + * XUL iframe or browser elements with attribute `type` being `content`. + * Used to create `ContentSymbiont` from. + * @type {nsIFrame|nsIBrowser} + */ + _frame: null, + + /** + * Listener to the `'frameReady"` event (emitted when `iframe` is ready). + * Removes listener, sets right permissions to the frame and loads content. + */ + _initFrame: function _initFrame(frame) { + if (this._loadListener) + this._unregisterListener(); + + this._frame = frame; + frame.docShell.allowJavascript = this.allow.script; + frame.setAttribute("src", this._contentURL); + + // Inject `addon` object in document if we load a document from + // one of our addon folder and if no content script are defined. bug 612726 + let isDataResource = + typeof this._contentURL == "string" && + this._contentURL.indexOf(require("@packaging").uriPrefix) == 0; + let hasContentScript = + (Array.isArray(this.contentScript) ? this.contentScript.length > 0 + : !!this.contentScript) || + (Array.isArray(this.contentScriptFile) ? this.contentScriptFile.length > 0 + : !!this.contentScriptFile); + // If we have to inject `addon` we have to do it before document + // script execution, so during `start`: + this._injectInDocument = isDataResource && !hasContentScript; + if (this._injectInDocument) + this.contentScriptWhen = "start"; + + if ((frame.contentDocument.readyState == "complete" || + (frame.contentDocument.readyState == "interactive" && + this.contentScriptWhen != 'end' )) && + frame.contentDocument.location == this._contentURL) { + // In some cases src doesn't change and document is already ready + // (for ex: when the user moves a widget while customizing toolbars.) + this._onInit(); + return; + } + + let self = this; + + if ('start' == this.contentScriptWhen) { + this._loadEvent = 'start'; + observers.add('document-element-inserted', + this._loadListener = function onStart(doc) { + + let window = doc.defaultView; + if (window && window == frame.contentWindow) { + self._unregisterListener(); + self._onInit(); + } + + }); + return; + } + + let eventName = 'end' == this.contentScriptWhen ? 'load' : 'DOMContentLoaded'; + let self = this; + this._loadEvent = eventName; + frame.addEventListener(eventName, + this._loadListener = function _onReady(event) { + + if (event.target != frame.contentDocument) + return; + self._unregisterListener(); + + self._onInit(); + + }, true); + + }, + + /** + * Unregister listener that watchs for document being ready to be injected. + * This listener is registered in `Symbiont._initFrame`. + */ + _unregisterListener: function _unregisterListener() { + if (!this._loadListener) + return; + if (this._loadEvent == "start") { + observers.remove('document-element-inserted', this._loadListener); + } + else { + this._frame.removeEventListener(this._loadEvent, this._loadListener, + true); + } + this._loadListener = null; + }, + + /** + * Called by Symbiont itself when the frame is ready to load + * content scripts according to contentScriptWhen. Overloaded by Panel. + */ + _onInit: function () { + this._initWorker({ window: this._frame.contentWindow }); + } + +}); +exports.Symbiont = Symbiont; |