127 lines
3.9 KiB
JavaScript
127 lines
3.9 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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const { Cc, Ci } = require('chrome'),
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{ setTimeout } = require('../timers'),
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{ Trait } = require('../deprecated/traits'),
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{ openDialog } = require('../window/utils'),
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ON_LOAD = 'load',
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ON_UNLOAD = 'unload',
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STATE_LOADED = 'complete';
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/**
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* Trait provides private `_window` property and requires `_onLoad` property
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* that will be called when `_window` is loaded. If `_window` property value
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* is changed with already loaded window `_onLoad` still will be called.
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*/
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const WindowLoader = Trait.compose({
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/**
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* Internal listener that is called when window is loaded.
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* Please keep in mind that this trait will not handle exceptions that may
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* be thrown by this method so method itself should take care of
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* handling them.
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* @param {nsIWindow} window
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*/
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_onLoad: Trait.required,
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_tabOptions: Trait.required,
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/**
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* Internal listener that is called when `_window`'s DOM 'unload' event
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* is dispatched. Please note that this trait will not handle exceptions that
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* may be thrown by this method so method itself should take care of
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* handling them.
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*/
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_onUnload: Trait.required,
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_load: function _load() {
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if (this.__window)
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return;
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this._window = openDialog({
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private: this._isPrivate,
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args: this._tabOptions.map(function(options) options.url).join("|")
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});
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},
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/**
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* Private window who's load event is being tracked. Once window is loaded
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* `_onLoad` is called.
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* @type {nsIWindow}
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*/
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get _window() this.__window,
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set _window(window) {
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let _window = this.__window;
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if (!window) window = null;
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if (window !== _window) {
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if (_window) {
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_window.removeEventListener(ON_UNLOAD, this.__unloadListener, false);
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_window.removeEventListener(ON_LOAD, this.__loadListener, false);
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}
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if (window) {
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window.addEventListener(
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ON_UNLOAD,
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this.__unloadListener ||
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(this.__unloadListener = this._unloadListener.bind(this))
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,
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false
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);
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this.__window = window;
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// If window is not loaded yet setting up a listener.
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if (STATE_LOADED != window.document.readyState) {
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window.addEventListener(
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ON_LOAD,
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this.__loadListener ||
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(this.__loadListener = this._loadListener.bind(this))
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,
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false
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);
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}
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else { // If window is loaded calling listener next turn of event loop.
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this._onLoad(window)
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}
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}
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else {
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this.__window = null;
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}
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}
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},
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__window: null,
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/**
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* Internal method used for listening 'load' event on the `_window`.
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* Method takes care of removing itself from 'load' event listeners once
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* event is being handled.
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*/
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_loadListener: function _loadListener(event) {
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let window = this._window;
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if (!event.target || event.target.defaultView != window) return;
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window.removeEventListener(ON_LOAD, this.__loadListener, false);
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this._onLoad(window);
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},
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__loadListener: null,
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/**
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* Internal method used for listening 'unload' event on the `_window`.
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* Method takes care of removing itself from 'unload' event listeners once
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* event is being handled.
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*/
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_unloadListener: function _unloadListener(event) {
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let window = this._window;
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if (!event.target
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|| event.target.defaultView != window
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|| STATE_LOADED != window.document.readyState
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) return;
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window.removeEventListener(ON_UNLOAD, this.__unloadListener, false);
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this._onUnload(window);
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},
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__unloadListener: null
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});
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exports.WindowLoader = WindowLoader;
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