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<h1><a href="http://developer.yahoo.com/yui/" title="Yahoo! UI Library">Yahoo! UI Library</a></h1>
<h3>event <span class="subtitle">3.0.0b1</span></h3>
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<div class="highlight" ><pre><span class="o">(</span><span class="k">function</span><span class="o">()</span> <span class="o">{</span>
<span class="c">/**</span>
<span class="c"> * DOM event listener abstraction layer</span>
<span class="c"> * @module event</span>
<span class="c"> */</span>
<span class="k">var</span> <span class="nx">GLOBAL_ENV</span> <span class="o">=</span> <span class="nx">YUI</span><span class="o">.</span><span class="nx">Env</span><span class="o">,</span>
<span class="nx">adapt</span> <span class="o">=</span> <span class="nx">Y</span><span class="o">.</span><span class="nx">Env</span><span class="o">.</span><span class="nx">evt</span><span class="o">.</span><span class="nx">plugins</span><span class="o">,</span>
<span class="nx">yready</span> <span class="o">=</span> <span class="k">function</span><span class="o">()</span> <span class="o">{</span>
<span class="nx">Y</span><span class="o">.</span><span class="nx">fire</span><span class="o">(</span><span class="s1">'domready'</span><span class="o">);</span>
<span class="o">};</span>
<span class="nx">Y</span><span class="o">.</span><span class="nx">mix</span><span class="o">(</span><span class="nx">adapt</span><span class="o">,</span> <span class="o">{</span>
<span class="c">/**</span>
<span class="c"> * Executes the supplied callback when the DOM is first usable. This</span>
<span class="c"> * will execute immediately if called after the DOMReady event has</span>
<span class="c"> * fired. @todo the DOMContentReady event does not fire when the</span>
<span class="c"> * script is dynamically injected into the page. This means the</span>
<span class="c"> * DOMReady custom event will never fire in FireFox or Opera when the</span>
<span class="c"> * library is injected. It _will_ fire in Safari, and the IE </span>
<span class="c"> * implementation would allow for us to fire it if the defered script</span>
<span class="c"> * is not available. We want this to behave the same in all browsers.</span>
<span class="c"> * Is there a way to identify when the script has been injected </span>
<span class="c"> * instead of included inline? Is there a way to know whether the </span>
<span class="c"> * window onload event has fired without having had a listener attached </span>
<span class="c"> * to it when it did so?</span>
<span class="c"> *</span>
<span class="c"> * <p>The callback is a Event.Custom, so the signature is:</p></span>
<span class="c"> * <p>type &lt;string&gt;, args &lt;array&gt;, customobject &lt;object&gt;</p></span>
<span class="c"> * <p>For DOMReady events, there are no fire argments, so the</span>
<span class="c"> * signature is:</p></span>
<span class="c"> * <p>"DOMReady", [], obj</p></span>
<span class="c"> *</span>
<span class="c"> *</span>
<span class="c"> * @event domready</span>
<span class="c"> * @for YUI</span>
<span class="c"> *</span>
<span class="c"> * @param {function} fn what to execute when the element is found.</span>
<span class="c"> * @optional context execution context</span>
<span class="c"> * @optional args 0..n arguments to send to the listener</span>
<span class="c"> *</span>
<span class="c"> */</span>
<span class="nx">domready</span><span class="o">:</span> <span class="o">{},</span>
<span class="c">/**</span>
<span class="c"> * Use domready event instead. @see domready</span>
<span class="c"> * @event event:ready</span>
<span class="c"> * @for YUI</span>
<span class="c"> * @deprecated use 'domready' instead</span>
<span class="c"> */</span>
<span class="s1">'event:ready'</span><span class="o">:</span> <span class="o">{</span>
<span class="nx">on</span><span class="o">:</span> <span class="k">function</span><span class="o">()</span> <span class="o">{</span>
<span class="k">var</span> <span class="nx">a</span> <span class="o">=</span> <span class="nx">Y</span><span class="o">.</span><span class="nb">Array</span><span class="o">(</span><span class="nx">arguments</span><span class="o">,</span> <span class="m">0</span><span class="o">,</span> <span class="kc">true</span><span class="o">);</span>
<span class="nx">a</span><span class="o">[</span><span class="m">0</span><span class="o">]</span> <span class="o">=</span> <span class="s1">'domready'</span><span class="o">;</span>
<span class="k">return</span> <span class="nx">Y</span><span class="o">.</span><span class="nx">subscribe</span><span class="o">.</span><span class="nx">apply</span><span class="o">(</span><span class="nx">Y</span><span class="o">,</span> <span class="nx">a</span><span class="o">);</span>
<span class="o">},</span>
<span class="nx">detach</span><span class="o">:</span> <span class="k">function</span><span class="o">()</span> <span class="o">{</span>
<span class="k">var</span> <span class="nx">a</span> <span class="o">=</span> <span class="nx">Y</span><span class="o">.</span><span class="nb">Array</span><span class="o">(</span><span class="nx">arguments</span><span class="o">,</span> <span class="m">0</span><span class="o">,</span> <span class="kc">true</span><span class="o">);</span>
<span class="nx">a</span><span class="o">[</span><span class="m">0</span><span class="o">]</span> <span class="o">=</span> <span class="s1">'domready'</span><span class="o">;</span>
<span class="k">return</span> <span class="nx">Y</span><span class="o">.</span><span class="nx">unsubscribe</span><span class="o">.</span><span class="nx">apply</span><span class="o">(</span><span class="nx">Y</span><span class="o">,</span> <span class="nx">a</span><span class="o">);</span>
<span class="o">}</span>
<span class="o">}</span>
<span class="o">});</span>
<span class="nx">Y</span><span class="o">.</span><span class="nx">publish</span><span class="o">(</span><span class="s1">'domready'</span><span class="o">,</span> <span class="o">{</span>
<span class="nx">fireOnce</span><span class="o">:</span> <span class="kc">true</span>
<span class="o">});</span>
<span class="k">if</span> <span class="o">(</span><span class="nx">GLOBAL_ENV</span><span class="o">.</span><span class="nx">DOMReady</span><span class="o">)</span> <span class="o">{</span>
<span class="c">// console.log('DOMReady already fired', 'info', 'event');</span>
<span class="c"></span> <span class="nx">yready</span><span class="o">();</span>
<span class="o">}</span> <span class="k">else</span> <span class="o">{</span>
<span class="c">// console.log('setting up before listener', 'info', 'event');</span>
<span class="c"></span> <span class="c">// console.log('env: ' + YUI.Env.windowLoaded, 'info', 'event');</span>
<span class="c"></span> <span class="nx">Y</span><span class="o">.</span><span class="nx">before</span><span class="o">(</span><span class="nx">yready</span><span class="o">,</span> <span class="nx">GLOBAL_ENV</span><span class="o">,</span> <span class="s2">"_ready"</span><span class="o">);</span>
<span class="o">}</span>
<span class="o">})();</span>
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