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File: public/js/tinymce/src/ui/src/main/js/data/ObservableObject.js

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File: public/js/tinymce/src/ui/src/main/js/data/ObservableObject.js
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/** * ObservableObject.js * * Released under LGPL License. * Copyright (c) 1999-2017 Ephox Corp. All rights reserved * * License: http://www.tinymce.com/license * Contributing: http://www.tinymce.com/contributing */ /** * This class is a object that is observable when properties changes a change event gets emitted. * * @private * @class tinymce.data.ObservableObject */ define( 'tinymce.ui.data.ObservableObject', [ 'tinymce.ui.data.Binding', 'tinymce.core.util.Class', 'tinymce.core.util.Observable', 'tinymce.core.util.Tools' ], function (Binding, Class, Observable, Tools) { function isNode(node) { return node.nodeType > 0; } // Todo: Maybe this should be shallow compare since it might be huge object references function isEqual(a, b) { var k, checked; // Strict equals if (a === b) { return true; } // Compare null if (a === null || b === null) { return a === b; } // Compare number, boolean, string, undefined if (typeof a !== "object" || typeof b !== "object") { return a === b; } // Compare arrays if (Tools.isArray(b)) { if (a.length !== b.length) { return false; } k = a.length; while (k--) { if (!isEqual(a[k], b[k])) { return false; } } } // Shallow compare nodes if (isNode(a) || isNode(b)) { return a === b; } // Compare objects checked = {}; for (k in b) { if (!isEqual(a[k], b[k])) { return false; } checked[k] = true; } for (k in a) { if (!checked[k] && !isEqual(a[k], b[k])) { return false; } } return true; } return Class.extend({ Mixins: [Observable], /** * Constructs a new observable object instance. * * @constructor * @param {Object} data Initial data for the object. */ init: function (data) { var name, value; data = data || {}; for (name in data) { value = data[name]; if (value instanceof Binding) { data[name] = value.create(this, name); } } this.data = data; }, /** * Sets a property on the value this will call * observers if the value is a change from the current value. * * @method set * @param {String/object} name Name of the property to set or a object of items to set. * @param {Object} value Value to set for the property. * @return {tinymce.data.ObservableObject} Observable object instance. */ set: function (name, value) { var key, args, oldValue = this.data[name]; if (value instanceof Binding) { value = value.create(this, name); } if (typeof name === "object") { for (key in name) { this.set(key, name[key]); } return this; } if (!isEqual(oldValue, value)) { this.data[name] = value; args = { target: this, name: name, value: value, oldValue: oldValue }; this.fire('change:' + name, args); this.fire('change', args); } return this; }, /** * Gets a property by name. * * @method get * @param {String} name Name of the property to get. * @return {Object} Object value of propery. */ get: function (name) { return this.data[name]; }, /** * Returns true/false if the specified property exists. * * @method has * @param {String} name Name of the property to check for. * @return {Boolean} true/false if the item exists. */ has: function (name) { return name in this.data; }, /** * Returns a dynamic property binding for the specified property name. This makes * it possible to sync the state of two properties in two ObservableObject instances. * * @method bind * @param {String} name Name of the property to sync with the property it's inserted to. * @return {tinymce.data.Binding} Data binding instance. */ bind: function (name) { return Binding.create(this, name); }, /** * Destroys the observable object and fires the "destroy" * event and clean up any internal resources. * * @method destroy */ destroy: function () { this.fire('destroy'); } }); } );