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<h1><a href="http://developer.yahoo.com/yui/" title="Yahoo! UI Library">Yahoo! UI Library</a></h1> |
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<h3>queue <span class="subtitle">3.0.0b1</span></h3> |
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<a href="./index.html" title="Yahoo! UI Library">Yahoo! UI Library</a> |
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> <a href="./module_queue.html" title="queue">queue</a> |
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> queue-base.js (source view) |
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<div class="highlight" ><pre><span class="c">/**</span> |
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<span class="c"> * <p>The Queue module adds a common data structure for FIFO operations. In its</span> |
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<span class="c"> * simplest form, it is little more than an array wrapper. Additional</span> |
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<span class="c"> * submodules introduce more functionality such as promotion and removal of</span> |
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<span class="c"> * queued items.</p></span> |
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<span class="c"> *</span> |
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<span class="c"> * <p>An AsyncQueue class is provided in the queue-run submodule. This class</span> |
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<span class="c"> * affords a mechanism to do complex sequential and iterative callback</span> |
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<span class="c"> * execution across configured timeouts.</span> |
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<span class="c"> *</span> |
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<span class="c"> * @module queue</span> |
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<span class="c"> */</span> |
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<span class="c">/**</span> |
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<span class="c"> * A simple FIFO queue. Items are added to the Queue with add(1..n items) and</span> |
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<span class="c"> * removed using next().</span> |
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<span class="c"> *</span> |
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<span class="c"> * @module queue</span> |
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<span class="c"> * @submodule queue-base</span> |
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<span class="c"> * @class Queue</span> |
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<span class="c"> * @param item* {MIXED} 0..n items to seed the queue</span> |
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<span class="c"> */</span> |
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<span class="k">function</span> <span class="nx">Queue</span><span class="o">()</span> <span class="o">{</span> |
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<span class="k">this</span><span class="o">.</span><span class="nx">_init</span><span class="o">();</span> |
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<span class="k">this</span><span class="o">.</span><span class="nx">add</span><span class="o">.</span><span class="nx">apply</span><span class="o">(</span><span class="k">this</span><span class="o">,</span> <span class="nx">arguments</span><span class="o">);</span> |
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<span class="o">}</span> |
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<span class="nx">Queue</span><span class="o">.</span><span class="nx">prototype</span> <span class="o">=</span> <span class="o">{</span> |
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<span class="c">/**</span> |
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<span class="c"> * Initialize the queue</span> |
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<span class="c"> *</span> |
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<span class="c"> * @method _init</span> |
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<span class="c"> * @protected</span> |
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<span class="c"> */</span> |
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<span class="nx">_init</span> <span class="o">:</span> <span class="k">function</span> <span class="o">()</span> <span class="o">{</span> |
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<span class="c">/**</span> |
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<span class="c"> * The collection of enqueued items</span> |
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<span class="c"> *</span> |
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<span class="c"> * @property _q</span> |
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<span class="c"> * @type {Array}</span> |
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<span class="c"> * @protected</span> |
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<span class="c"> */</span> |
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<span class="k">this</span><span class="o">.</span><span class="nx">_q</span> <span class="o">=</span> <span class="o">[];</span> |
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<span class="o">},</span> |
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<span class="c">/**</span> |
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<span class="c"> * Get the next item in the queue.</span> |
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<span class="c"> *</span> |
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<span class="c"> * @method next</span> |
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<span class="c"> * @return {MIXED} the next item in the queue</span> |
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<span class="c"> */</span> |
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<span class="nx">next</span> <span class="o">:</span> <span class="k">function</span> <span class="o">()</span> <span class="o">{</span> |
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<span class="k">return</span> <span class="k">this</span><span class="o">.</span><span class="nx">_q</span><span class="o">.</span><span class="nx">shift</span><span class="o">();</span> |
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<span class="o">},</span> |
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<span class="c">/**</span> |
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<span class="c"> * Add 0..n items to the end of the queue</span> |
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<span class="c"> *</span> |
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<span class="c"> * @method add</span> |
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<span class="c"> * @param item* {MIXED} 0..n items</span> |
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<span class="c"> */</span> |
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<span class="nx">add</span> <span class="o">:</span> <span class="k">function</span> <span class="o">()</span> <span class="o">{</span> |
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<span class="nx">Y</span><span class="o">.</span><span class="nb">Array</span><span class="o">.</span><span class="nx">each</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="k">function</span> <span class="o">(</span><span class="nx">fn</span><span class="o">)</span> <span class="o">{</span> |
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<span class="k">this</span><span class="o">.</span><span class="nx">_q</span><span class="o">.</span><span class="nx">push</span><span class="o">(</span><span class="nx">fn</span><span class="o">);</span> |
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<span class="o">},</span><span class="k">this</span><span class="o">);</span> |
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<span class="k">return</span> <span class="k">this</span><span class="o">;</span> |
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<span class="o">},</span> |
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<span class="c">/**</span> |
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<span class="c"> * Returns the current number of queued items</span> |
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<span class="c"> *</span> |
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<span class="c"> * @method size</span> |
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<span class="c"> * @return {Number}</span> |
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<span class="c"> */</span> |
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<span class="nx">size</span> <span class="o">:</span> <span class="k">function</span> <span class="o">()</span> <span class="o">{</span> |
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<span class="k">return</span> <span class="k">this</span><span class="o">.</span><span class="nx">_q</span><span class="o">.</span><span class="nx">length</span><span class="o">;</span> |
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<span class="o">}</span> |
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<span class="o">};</span> |
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<span class="nx">Y</span><span class="o">.</span><span class="nx">Queue</span> <span class="o">=</span> <span class="nx">Queue</span><span class="o">;</span> |
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</pre></div> |
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