2 YUI 3.13.0 (build 508226d)
3 Copyright 2013 Yahoo! Inc. All rights reserved.
4 Licensed under the BSD License.
5 http://yuilibrary.com/license/
8 YUI.add('plugin', function (Y, NAME) {
11 * Provides the base Plugin class, which plugin developers should extend, when creating custom plugins
17 * The base class for all Plugin instances.
21 * @param {Object} config Configuration object with property name/value pairs.
23 function Plugin(config) {
24 if (! (this.hasImpl && this.hasImpl(Y.Plugin.Base)) ) {
25 Plugin.superclass.constructor.apply(this, arguments);
27 Plugin.prototype.initializer.apply(this, arguments);
32 * Object defining the set of attributes supported by the Plugin.Base class
41 * The plugin's host object.
53 * The string identifying the Plugin.Base class. Plugins extending
54 * Plugin.Base should set their own NAME value.
60 Plugin.NAME = 'plugin';
63 * The name of the property the the plugin will be attached to
64 * when plugged into a Plugin Host. Plugins extending Plugin.Base,
65 * should set their own NS value.
73 Y.extend(Plugin, Y.Base, {
76 * The list of event handles for event listeners or AOP injected methods
77 * applied by the plugin to the host object.
87 * Initializer lifecycle implementation.
90 * @param {Object} config Configuration object with property name/value pairs.
92 initializer : function(config) {
93 if (!this.get("host")) { Y.log('No host defined for plugin ' + this, 'warn', 'Plugin');}
95 Y.log('Initializing: ' + this.constructor.NAME, 'info', 'Plugin');
99 * Destructor lifecycle implementation.
101 * Removes any event listeners or injected methods applied by the Plugin
105 destructor: function() {
106 // remove all handles
108 for (var i = 0, l = this._handles.length; i < l; i++) {
109 this._handles[i].detach();
115 * Listens for the "on" moment of events fired by the host,
116 * or injects code "before" a given method on the host.
120 * @param strMethod {String} The event to listen for, or method to inject logic before.
121 * @param fn {Function} The handler function. For events, the "on" moment listener. For methods, the function to execute before the given method is executed.
122 * @param context {Object} An optional context to call the handler with. The default context is the plugin instance.
123 * @return handle {EventHandle} The detach handle for the handler.
125 doBefore: function(strMethod, fn, context) {
126 var host = this.get("host"), handle;
128 if (strMethod in host) { // method
129 handle = this.beforeHostMethod(strMethod, fn, context);
130 } else if (host.on) { // event
131 handle = this.onHostEvent(strMethod, fn, context);
138 * Listens for the "after" moment of events fired by the host,
139 * or injects code "after" a given method on the host.
143 * @param strMethod {String} The event to listen for, or method to inject logic after.
144 * @param fn {Function} The handler function. For events, the "after" moment listener. For methods, the function to execute after the given method is executed.
145 * @param context {Object} An optional context to call the handler with. The default context is the plugin instance.
146 * @return handle {EventHandle} The detach handle for the listener.
148 doAfter: function(strMethod, fn, context) {
149 var host = this.get("host"), handle;
151 if (strMethod in host) { // method
152 handle = this.afterHostMethod(strMethod, fn, context);
153 } else if (host.after) { // event
154 handle = this.afterHostEvent(strMethod, fn, context);
161 * Listens for the "on" moment of events fired by the host object.
163 * Listeners attached through this method will be detached when the plugin is unplugged.
165 * @method onHostEvent
166 * @param {String | Object} type The event type.
167 * @param {Function} fn The listener.
168 * @param {Object} context The execution context. Defaults to the plugin instance.
169 * @return handle {EventHandle} The detach handle for the listener.
171 onHostEvent : function(type, fn, context) {
172 var handle = this.get("host").on(type, fn, context || this);
173 this._handles.push(handle);
178 * Listens for the "on" moment of events fired by the host object one time only.
179 * The listener is immediately detached when it is executed.
181 * Listeners attached through this method will be detached when the plugin is unplugged.
183 * @method onceHostEvent
184 * @param {String | Object} type The event type.
185 * @param {Function} fn The listener.
186 * @param {Object} context The execution context. Defaults to the plugin instance.
187 * @return handle {EventHandle} The detach handle for the listener.
189 onceHostEvent : function(type, fn, context) {
190 var handle = this.get("host").once(type, fn, context || this);
191 this._handles.push(handle);
196 * Listens for the "after" moment of events fired by the host object.
198 * Listeners attached through this method will be detached when the plugin is unplugged.
200 * @method afterHostEvent
201 * @param {String | Object} type The event type.
202 * @param {Function} fn The listener.
203 * @param {Object} context The execution context. Defaults to the plugin instance.
204 * @return handle {EventHandle} The detach handle for the listener.
206 afterHostEvent : function(type, fn, context) {
207 var handle = this.get("host").after(type, fn, context || this);
208 this._handles.push(handle);
213 * Listens for the "after" moment of events fired by the host object one time only.
214 * The listener is immediately detached when it is executed.
216 * Listeners attached through this method will be detached when the plugin is unplugged.
218 * @method onceAfterHostEvent
219 * @param {String | Object} type The event type.
220 * @param {Function} fn The listener.
221 * @param {Object} context The execution context. Defaults to the plugin instance.
222 * @return handle {EventHandle} The detach handle for the listener.
224 onceAfterHostEvent : function(type, fn, context) {
225 var handle = this.get("host").onceAfter(type, fn, context || this);
226 this._handles.push(handle);
231 * Injects a function to be executed before a given method on host object.
233 * The function will be detached when the plugin is unplugged.
235 * @method beforeHostMethod
236 * @param {String} method The name of the method to inject the function before.
237 * @param {Function} fn The function to inject.
238 * @param {Object} context The execution context. Defaults to the plugin instance.
239 * @return handle {EventHandle} The detach handle for the injected function.
241 beforeHostMethod : function(strMethod, fn, context) {
242 var handle = Y.Do.before(fn, this.get("host"), strMethod, context || this);
243 this._handles.push(handle);
248 * Injects a function to be executed after a given method on host object.
250 * The function will be detached when the plugin is unplugged.
252 * @method afterHostMethod
253 * @param {String} method The name of the method to inject the function after.
254 * @param {Function} fn The function to inject.
255 * @param {Object} context The execution context. Defaults to the plugin instance.
256 * @return handle {EventHandle} The detach handle for the injected function.
258 afterHostMethod : function(strMethod, fn, context) {
259 var handle = Y.Do.after(fn, this.get("host"), strMethod, context || this);
260 this._handles.push(handle);
264 toString: function() {
265 return this.constructor.NAME + '[' + this.constructor.NS + ']';
269 Y.namespace("Plugin").Base = Plugin;
272 }, '3.13.0', {"requires": ["base-base"]});