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dispatcher.html
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<!DOCTYPE html>
<html>
<head>
<title>dispatcher.coffee</title>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<meta name="viewport" content="width=device-width, target-densitydpi=160dpi, initial-scale=1.0; maximum-scale=1.0; user-scalable=0;">
<link rel="stylesheet" media="all" href="docco.css" />
</head>
<body>
<div id="container">
<div id="background"></div>
<ul id="jump_to">
<li>
<a class="large" href="javascript:void(0);">Jump To …</a>
<a class="small" href="javascript:void(0);">+</a>
<div id="jump_wrapper">
<div id="jump_page">
<a class="source" href="chaplin.html">
chaplin.coffee
</a>
<a class="source" href="application.html">
application.coffee
</a>
<a class="source" href="composer.html">
composer.coffee
</a>
<a class="source" href="controller.html">
controller.coffee
</a>
<a class="source" href="dispatcher.html">
dispatcher.coffee
</a>
<a class="source" href="composition.html">
composition.coffee
</a>
<a class="source" href="event_broker.html">
event_broker.coffee
</a>
<a class="source" href="history.html">
history.coffee
</a>
<a class="source" href="route.html">
route.coffee
</a>
<a class="source" href="router.html">
router.coffee
</a>
<a class="source" href="support.html">
support.coffee
</a>
<a class="source" href="sync_machine.html">
sync_machine.coffee
</a>
<a class="source" href="utils.html">
utils.coffee
</a>
<a class="source" href="mediator.html">
mediator.coffee
</a>
<a class="source" href="collection.html">
collection.coffee
</a>
<a class="source" href="model.html">
model.coffee
</a>
<a class="source" href="collection_view.html">
collection_view.coffee
</a>
<a class="source" href="layout.html">
layout.coffee
</a>
<a class="source" href="view.html">
view.coffee
</a>
</div>
</li>
</ul>
<ul class="sections">
<li id="title">
<div class="annotation">
<h1>dispatcher.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>
mediator = <span class="built_in">require</span> <span class="string">'chaplin/mediator'</span>
utils = <span class="built_in">require</span> <span class="string">'chaplin/lib/utils'</span>
EventBroker = <span class="built_in">require</span> <span class="string">'chaplin/lib/event_broker'</span>
module.<span class="built_in">exports</span> = <span class="class"><span class="keyword">class</span> <span class="title">Dispatcher</span></span></pre></div></div>
</li>
<li id="section-2">
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<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-3">
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</div>
<p>Mixin an EventBroker.</p>
</div>
<div class="content"><div class='highlight'><pre> _.extend <span class="property">@prototype</span>, EventBroker</pre></div></div>
</li>
<li id="section-4">
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</div>
<p>The previous route information.
This object contains the controller name, action, path, and name (if any).</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="attribute">previousRoute</span>: <span class="literal">null</span></pre></div></div>
</li>
<li id="section-5">
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<p>The current controller, route information, and parameters.
The current route object contains the same information as previous.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="attribute">currentController</span>: <span class="literal">null</span>
<span class="attribute">currentRoute</span>: <span class="literal">null</span>
<span class="attribute">currentParams</span>: <span class="literal">null</span>
<span class="attribute">currentQuery</span>: <span class="literal">null</span>
<span class="attribute">constructor</span>:<span class="function"> -></span>
<span class="property">@initialize</span> arguments...
<span class="attribute">initialize</span>: <span class="function"><span class="params">(options = {})</span> -></span></pre></div></div>
</li>
<li id="section-6">
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<p>Merge the options.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="property">@settings</span> = _.defaults options,
<span class="attribute">controllerPath</span>: <span class="string">'controllers/'</span>
<span class="attribute">controllerSuffix</span>: <span class="string">'_controller'</span></pre></div></div>
</li>
<li id="section-7">
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<p>Listen to global events.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="property">@subscribeEvent</span> <span class="string">'router:match'</span>, <span class="property">@dispatch</span></pre></div></div>
</li>
<li id="section-8">
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<p>Controller management.</p>
<h2 id="starting-and-disposing-controllers-">Starting and disposing controllers.</h2>
</div>
</li>
<li id="section-9">
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<p>The standard flow is:</p>
<ol>
<li>Test if it’s a new controller/action with new params</li>
<li>Hide the previous view</li>
<li>Dispose the previous controller</li>
<li>Instantiate the new controller, call the controller action</li>
<li>Show the new view</li>
</ol>
</div>
<div class="content"><div class='highlight'><pre> <span class="attribute">dispatch</span>: <span class="function"><span class="params">(route, params, options)</span> -></span></pre></div></div>
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<p>Clone params and options so the original objects remain untouched.</p>
</div>
<div class="content"><div class='highlight'><pre> params = <span class="keyword">if</span> params <span class="keyword">then</span> _.extend {}, params <span class="keyword">else</span> {}
options = <span class="keyword">if</span> options <span class="keyword">then</span> _.extend {}, options <span class="keyword">else</span> {}</pre></div></div>
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<li id="section-11">
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<p>null or undefined query parameters are equivalent to an empty hash</p>
</div>
<div class="content"><div class='highlight'><pre> options.query = {} <span class="keyword">if</span> <span class="keyword">not</span> options.query?</pre></div></div>
</li>
<li id="section-12">
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<p>Whether to force the controller startup even
if current and new controllers and params match
Default to false unless explicitly set to true.</p>
</div>
<div class="content"><div class='highlight'><pre> options.forceStartup = <span class="literal">false</span> <span class="keyword">unless</span> options.forceStartup <span class="keyword">is</span> <span class="literal">true</span></pre></div></div>
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<p>Stop if the desired controller/action is already active
with the same params.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="keyword">return</span> <span class="keyword">if</span> <span class="keyword">not</span> options.forceStartup <span class="keyword">and</span>
<span class="property">@currentRoute</span>?.controller <span class="keyword">is</span> route.controller <span class="keyword">and</span>
<span class="property">@currentRoute</span>?.action <span class="keyword">is</span> route.action <span class="keyword">and</span>
_.isEqual(<span class="property">@currentParams</span>, params) <span class="keyword">and</span>
_.isEqual(<span class="property">@currentQuery</span>, options.query)</pre></div></div>
</li>
<li id="section-14">
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<p>Fetch the new controller, then go on.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="property">@loadController</span> route.controller, <span class="function"><span class="params">(Controller)</span> =></span>
<span class="property">@controllerLoaded</span> route, params, options, Controller</pre></div></div>
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<p>Load the constructor for a given controller name.
The default implementation uses require() from a AMD module loader
like RequireJS to fetch the constructor.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="attribute">loadController</span>: <span class="function"><span class="params">(name, handler)</span> -></span>
fileName = name + <span class="property">@settings</span>.controllerSuffix
moduleName = <span class="property">@settings</span>.controllerPath + fileName
<span class="keyword">if</span> define?.amd
<span class="built_in">require</span> [moduleName], handler
<span class="keyword">else</span>
setTimeout<span class="function"> =></span>
handler <span class="built_in">require</span> moduleName
, <span class="number">0</span></pre></div></div>
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<p>Handler for the controller lazy-loading.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="attribute">controllerLoaded</span>: <span class="function"><span class="params">(route, params, options, Controller)</span> -></span>
<span class="keyword">if</span> <span class="property">@nextPreviousRoute</span> = <span class="property">@currentRoute</span>
previous = _.extend {}, <span class="property">@nextPreviousRoute</span>
previous.params = <span class="property">@currentParams</span> <span class="keyword">if</span> <span class="property">@currentParams</span>?
<span class="keyword">delete</span> previous.previous <span class="keyword">if</span> previous.previous
prev = {previous}
<span class="property">@nextCurrentRoute</span> = _.extend {}, route, prev
controller = <span class="keyword">new</span> Controller params, <span class="property">@nextCurrentRoute</span>, options
<span class="property">@executeBeforeAction</span> controller, <span class="property">@nextCurrentRoute</span>, params, options</pre></div></div>
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<p>Executes controller action.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="attribute">executeAction</span>: <span class="function"><span class="params">(controller, route, params, options)</span> -></span></pre></div></div>
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<p>Dispose the previous controller.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="keyword">if</span> <span class="property">@currentController</span></pre></div></div>
</li>
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<p>Notify the rest of the world beforehand.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="property">@publishEvent</span> <span class="string">'beforeControllerDispose'</span>, <span class="property">@currentController</span></pre></div></div>
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<p>Passing new parameters that the action method will receive.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="property">@currentController</span>.dispose params, route, options</pre></div></div>
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<p>Save the new controller and its parameters.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="property">@currentController</span> = controller
<span class="property">@currentParams</span> = params
<span class="property">@currentQuery</span> = options.query</pre></div></div>
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<p>Call the controller action with params and options.</p>
</div>
<div class="content"><div class='highlight'><pre> controller[route.action] params, route, options</pre></div></div>
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<p>Stop if the action triggered a redirect.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="keyword">return</span> <span class="keyword">if</span> controller.redirected</pre></div></div>
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<p>We're done! Spread the word!</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="property">@publishEvent</span> <span class="string">'dispatcher:dispatch'</span>, <span class="property">@currentController</span>,
params, route, options</pre></div></div>
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<p>Executes before action filterer.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="attribute">executeBeforeAction</span>: <span class="function"><span class="params">(controller, route, params, options)</span> -></span>
before = controller.beforeAction
<span class="function"><span class="title">executeAction</span> = =></span>
<span class="keyword">if</span> controller.redirected <span class="keyword">or</span> <span class="property">@currentRoute</span> <span class="keyword">and</span> route <span class="keyword">is</span> <span class="property">@currentRoute</span>
<span class="property">@nextPreviousRoute</span> = <span class="property">@nextCurrentRoute</span> = <span class="literal">null</span>
controller.dispose()
<span class="keyword">return</span>
<span class="property">@previousRoute</span> = <span class="property">@nextPreviousRoute</span>
<span class="property">@currentRoute</span> = <span class="property">@nextCurrentRoute</span>
<span class="property">@nextPreviousRoute</span> = <span class="property">@nextCurrentRoute</span> = <span class="literal">null</span>
<span class="property">@executeAction</span> controller, route, params, options
<span class="keyword">unless</span> before
executeAction()
<span class="keyword">return</span></pre></div></div>
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<p>Throw deprecation warning.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="keyword">if</span> <span class="keyword">typeof</span> before <span class="keyword">isnt</span> <span class="string">'function'</span>
<span class="keyword">throw</span> <span class="keyword">new</span> TypeError <span class="string">'Controller#beforeAction: function expected. '</span> +
<span class="string">'Old object-like form is not supported.'</span></pre></div></div>
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<p>Execute action in controller context.</p>
</div>
<div class="content"><div class='highlight'><pre> promise = controller.beforeAction params, route, options
<span class="keyword">if</span> promise <span class="keyword">and</span> promise.<span class="keyword">then</span>
promise.<span class="keyword">then</span> executeAction
<span class="keyword">else</span>
executeAction()</pre></div></div>
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<h2 id="disposal">Disposal</h2>
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<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>
<span class="property">@unsubscribeAllEvents</span>()
<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>
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<div class="content"><div class='highlight'><pre> Object.freeze? <span class="keyword">this</span></pre></div></div>
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