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<!DOCTYPE html>
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<title>composition.coffee</title>
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<ul class="sections">
<li id="title">
<div class="annotation">
<h1>composition.coffee</h1>
</div>
</li>
<li id="section-1">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-1">¶</a>
</div>
</div>
<div class="content"><div class='highlight'><pre><span class="string">'use strict'</span>
_ = <span class="built_in">require</span> <span class="string">'underscore'</span>
Backbone = <span class="built_in">require</span> <span class="string">'backbone'</span>
EventBroker = <span class="built_in">require</span> <span class="string">'chaplin/lib/event_broker'</span>
has = <span class="attribute">Object</span>::hasOwnProperty</pre></div></div>
</li>
<li id="section-2">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-2">¶</a>
</div>
<h2 id="composition">Composition</h2>
</div>
</li>
<li id="section-3">
<div class="annotation">
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<a class="pilcrow" href="#section-3">¶</a>
</div>
<p>A utility class that is meant as a simple proxied version of a
controller that is used internally to inflate simple
calls to !composer:compose and may be extended and used to have complete
control over the composition process.</p>
</div>
<div class="content"><div class='highlight'><pre>module.<span class="built_in">exports</span> = <span class="class"><span class="keyword">class</span> <span class="title">Composition</span></span></pre></div></div>
</li>
<li id="section-4">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-4">¶</a>
</div>
<p>Borrow the static extend method from Backbone.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="property">@extend</span> = Backbone.Model.extend</pre></div></div>
</li>
<li id="section-5">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-5">¶</a>
</div>
<p>Mixin Backbone events and EventBroker.</p>
</div>
<div class="content"><div class='highlight'><pre> _.extend <span class="property">@prototype</span>, Backbone.Events
_.extend <span class="property">@prototype</span>, EventBroker</pre></div></div>
</li>
<li id="section-6">
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<a class="pilcrow" href="#section-6">¶</a>
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<p>The item that is composed; this is by default a reference to this.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="attribute">item</span>: <span class="literal">null</span></pre></div></div>
</li>
<li id="section-7">
<div class="annotation">
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<a class="pilcrow" href="#section-7">¶</a>
</div>
<p>The options that this composition was constructed with.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="attribute">options</span>: <span class="literal">null</span></pre></div></div>
</li>
<li id="section-8">
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<a class="pilcrow" href="#section-8">¶</a>
</div>
<p>Whether this composition is currently stale.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="attribute">_stale</span>: <span class="literal">false</span>
<span class="attribute">constructor</span>: <span class="function"><span class="params">(options)</span> -></span>
<span class="property">@options</span> = _.extend {}, options <span class="keyword">if</span> options?
<span class="property">@item</span> = <span class="keyword">this</span>
<span class="property">@initialize</span> <span class="property">@options</span>
<span class="attribute">initialize</span>:<span class="function"> -></span></pre></div></div>
</li>
<li id="section-9">
<div class="annotation">
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<p>Empty per default.</p>
<p>The compose method is called when this composition is to be composed.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="attribute">compose</span>:<span class="function"> -></span></pre></div></div>
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<li id="section-10">
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<a class="pilcrow" href="#section-10">¶</a>
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<p>Empty per default.</p>
<p>The check method is called when this composition is asked to be
composed again. The passed options are the newly passed options.
If this returns false then the composition is re-composed.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="attribute">check</span>: <span class="function"><span class="params">(options)</span> -></span>
_.isEqual <span class="property">@options</span>, options</pre></div></div>
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<li id="section-11">
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<p>Marks all applicable items as stale.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="attribute">stale</span>: <span class="function"><span class="params">(value)</span> -></span></pre></div></div>
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<li id="section-12">
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<p>Return the current property if not requesting a change.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="keyword">return</span> <span class="property">@_stale</span> <span class="keyword">unless</span> value?</pre></div></div>
</li>
<li id="section-13">
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<p>Sets the stale property for every item in the composition that has it.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="property">@_stale</span> = value
<span class="keyword">for</span> name, item <span class="keyword">of</span> <span class="keyword">this</span> <span class="keyword">when</span> (
item <span class="keyword">and</span> item <span class="keyword">isnt</span> <span class="keyword">this</span> <span class="keyword">and</span>
<span class="keyword">typeof</span> item <span class="keyword">is</span> <span class="string">'object'</span> <span class="keyword">and</span> has.call(item, <span class="string">'stale'</span>)
)
item.stale = value</pre></div></div>
</li>
<li id="section-14">
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<p>Return nothing.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="keyword">return</span></pre></div></div>
</li>
<li id="section-15">
<div class="annotation">
<div class="pilwrap ">
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</div>
<h2 id="disposal">Disposal</h2>
</div>
</li>
<li id="section-16">
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</div>
</div>
<div class="content"><div class='highlight'><pre> <span class="attribute">disposed</span>: <span class="literal">false</span>
<span class="attribute">dispose</span>:<span class="function"> -></span>
<span class="keyword">return</span> <span class="keyword">if</span> <span class="property">@disposed</span></pre></div></div>
</li>
<li id="section-17">
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<p>Dispose and delete all members which are disposable.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="keyword">for</span> own prop, obj <span class="keyword">of</span> <span class="keyword">this</span> <span class="keyword">when</span> obj <span class="keyword">and</span> <span class="keyword">typeof</span> obj.dispose <span class="keyword">is</span> <span class="string">'function'</span>
<span class="keyword">unless</span> obj <span class="keyword">is</span> <span class="keyword">this</span>
obj.dispose()
<span class="keyword">delete</span> <span class="keyword">this</span>[prop]</pre></div></div>
</li>
<li id="section-18">
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<p>Unbind handlers of global events.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="property">@unsubscribeAllEvents</span>()</pre></div></div>
</li>
<li id="section-19">
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<p>Unbind all referenced handlers.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="property">@stopListening</span>()</pre></div></div>
</li>
<li id="section-20">
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<p>Remove properties which are not disposable.</p>
</div>
<div class="content"><div class='highlight'><pre> properties = [<span class="string">'redirected'</span>]
<span class="keyword">delete</span> <span class="keyword">this</span>[prop] <span class="keyword">for</span> prop <span class="keyword">in</span> properties</pre></div></div>
</li>
<li id="section-21">
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<p>Finished.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="property">@disposed</span> = <span class="literal">true</span></pre></div></div>
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<p>You're frozen when your heart’s not open.</p>
</div>
<div class="content"><div class='highlight'><pre> Object.freeze? <span class="keyword">this</span></pre></div></div>
</li>
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