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mercury_loader.html
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mercury_loader.html
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<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html;charset=utf-8">
<title>Mercury Editor - Annotated Source - mercury_loader.js</title>
<link href="/mercury/assets/stylesheets/application.css" media="screen" rel="stylesheet" type="text/css"/>
<script src="/mercury/assets/javascripts/application.js" type="text/javascript"></script>
<!--[if lt IE 7]>
<script type="text/javascript" src="/mercury/assets/javascripts/unitpngfix.js"></script>
<![endif]-->
</head>
<body>
<div id="background"></div>
<h1 id="logo"><a href="/mercury">Mercury Editor</a></h1>
<ul id="navigation">
<li><a href="/mercury">Home</a></li>
<li><a href="/mercury/downloads">Downloads</a></li>
<li><a href="/mercury/walkthrough">Walkthrough</a></li>
<li><a href="/mercury/documentation">Documentation</a></li>
<li class="active"><a href="/mercury/annotated_source">Annotated Source</a></li>
</ul>
<table cellspacing=0 cellpadding=0>
<thead>
<tr>
<th class=docs><h1>mercury_loader.js</h1></th>
<th class=code></th>
</tr>
</thead>
<tbody>
<tr id='section-1'>
<td class=docs>
<div class="pilwrap">
<a class="pilcrow" href="#section-1">¶</a>
</div>
</td>
<td class=code>
<div class='highlight'><pre><span class="cm">/*!</span>
<span class="cm"> * Mercury Editor is a CoffeeScript and jQuery based WYSIWYG editor. Documentation and other useful information can be</span>
<span class="cm"> * found at https://github.com/jejacks0n/mercury</span>
<span class="cm"> *</span>
<span class="cm"> * Supported browsers:</span>
<span class="cm"> * - Firefox 4+</span>
<span class="cm"> * - Chrome 10+</span>
<span class="cm"> * - Safari 5+</span>
<span class="cm"> *</span>
<span class="cm"> * Copyright (c) 2011 Jeremy Jackson</span>
<span class="cm"> *</span>
<span class="cm"> * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated</span>
<span class="cm"> * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the</span>
<span class="cm"> * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit</span>
<span class="cm"> * persons to whom the Software is furnished to do so, subject to the following conditions:</span>
<span class="cm"> *</span>
<span class="cm"> * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the</span>
<span class="cm"> * Software.</span>
<span class="cm"> *</span>
<span class="cm"> * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE</span>
<span class="cm"> * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR</span>
<span class="cm"> * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR</span>
<span class="cm"> * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.</span>
<span class="cm"> *</span>
<span class="cm"> */</span></pre></div>
</td>
</tr>
<tr id='section-Default_Packages'>
<td class=docs>
<div class="pilwrap">
<a class="pilcrow" href="#section-Default_Packages">¶</a>
</div>
<h2>Default Packages</h2>
<p>Some default packages are provided for you. If you want to define your own, feel free to do so before including this
script. These, or your own packages can be specified to the loader in query params (read below for details).</p>
</td>
<td class=code>
<div class='highlight'><pre><span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="nb">window</span><span class="p">.</span><span class="nx">mercuryPackages</span><span class="p">)</span> <span class="nb">window</span><span class="p">.</span><span class="nx">mercuryPackages</span> <span class="o">=</span> <span class="p">{</span>
<span class="nx">development</span><span class="o">:</span> <span class="p">{</span><span class="nx">javascripts</span><span class="o">:</span> <span class="s1">'mercury/dependencies/jquery-1.7.js,mercury.js'</span><span class="p">,</span> <span class="nx">stylesheets</span><span class="o">:</span> <span class="s1">'mercury.css'</span><span class="p">},</span>
<span class="nx">bundled</span><span class="o">:</span> <span class="p">{</span><span class="nx">javascripts</span><span class="o">:</span> <span class="s1">'javascripts/jquery-1.7.js,javascripts/mercury.min.js,javascripts/mercury_dialogs.js'</span><span class="p">,</span> <span class="nx">stylesheets</span><span class="o">:</span> <span class="s1">'stylesheets/mercury.bundle.css'</span><span class="p">}</span>
<span class="p">};</span></pre></div>
</td>
</tr>
<tr id='section-Mercury_Loader'>
<td class=docs>
<div class="pilwrap">
<a class="pilcrow" href="#section-Mercury_Loader">¶</a>
</div>
<h2>Mercury Loader</h2>
</td>
<td class=code>
<div class='highlight'><pre><span class="p">(</span><span class="kd">function</span><span class="p">()</span> <span class="p">{</span></pre></div>
</td>
</tr>
<tr id='section-4'>
<td class=docs>
<div class="pilwrap">
<a class="pilcrow" href="#section-4">¶</a>
</div>
<p>Useragent detection, which we use to determine if the client is supported. We do this method instead of checking
features because many of the features are supported in IE, but aren’t implemented to the W3C spec.</p>
</td>
<td class=code>
<div class='highlight'><pre> <span class="kd">var</span> <span class="nx">browser</span> <span class="o">=</span> <span class="p">{</span>
<span class="nx">webkit</span><span class="o">:</span> <span class="sr">/(webkit)[ \/]([\w.]+)/</span><span class="p">,</span>
<span class="nx">opera</span><span class="o">:</span> <span class="sr">/(opera)(?:.*version)?[ \/]([\w.]+)/</span><span class="p">,</span>
<span class="nx">msie</span><span class="o">:</span> <span class="sr">/(msie) ([\w.]+)/</span><span class="p">,</span>
<span class="nx">mozilla</span><span class="o">:</span> <span class="sr">/(mozilla)(?:.*? rv:([\w.]+))?/</span>
<span class="p">};</span>
<span class="kd">var</span> <span class="nx">ua</span> <span class="o">=</span> <span class="nx">navigator</span><span class="p">.</span><span class="nx">userAgent</span><span class="p">.</span><span class="nx">toLowerCase</span><span class="p">();</span>
<span class="kd">var</span> <span class="nx">match</span> <span class="o">=</span> <span class="nx">browser</span><span class="p">.</span><span class="nx">webkit</span><span class="p">.</span><span class="nx">exec</span><span class="p">(</span><span class="nx">ua</span><span class="p">)</span> <span class="o">||</span> <span class="nx">browser</span><span class="p">.</span><span class="nx">opera</span><span class="p">.</span><span class="nx">exec</span><span class="p">(</span><span class="nx">ua</span><span class="p">)</span> <span class="o">||</span> <span class="nx">browser</span><span class="p">.</span><span class="nx">msie</span><span class="p">.</span><span class="nx">exec</span><span class="p">(</span><span class="nx">ua</span><span class="p">)</span> <span class="o">||</span> <span class="nx">ua</span><span class="p">.</span><span class="nx">indexOf</span><span class="p">(</span><span class="s2">"compatible"</span><span class="p">)</span> <span class="o"><</span> <span class="mi">0</span> <span class="o">&&</span> <span class="nx">browser</span><span class="p">.</span><span class="nx">mozilla</span><span class="p">.</span><span class="nx">exec</span><span class="p">(</span><span class="nx">ua</span><span class="p">)</span> <span class="o">||</span> <span class="p">[];</span>
<span class="nx">browser</span> <span class="o">=</span> <span class="p">{</span><span class="nx">version</span><span class="o">:</span> <span class="nx">match</span><span class="p">[</span><span class="mi">2</span><span class="p">]</span> <span class="o">||</span> <span class="s2">"0"</span> <span class="p">};</span>
<span class="nx">browser</span><span class="p">[</span><span class="nx">match</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span> <span class="o">||</span> <span class="s2">""</span><span class="p">]</span> <span class="o">=</span> <span class="kc">true</span><span class="p">;</span></pre></div>
</td>
</tr>
<tr id='section-5'>
<td class=docs>
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</div>
<p>If the browser isn’t supported, we don’t try to do anything more. We do direct userAgent detection here because IE
thinks it’s supported but isn’t — in part because it has it’s own implementation of the contentEditable spec.</p>
</td>
<td class=code>
<div class='highlight'><pre> <span class="k">if</span> <span class="p">(</span><span class="nb">document</span><span class="p">.</span><span class="nx">getElementsByTagName</span> <span class="o">&&</span> <span class="nb">document</span><span class="p">.</span><span class="nx">getElementById</span> <span class="o">&&</span> <span class="nb">document</span><span class="p">.</span><span class="nx">designMode</span> <span class="o">&&</span> <span class="o">!</span><span class="nx">browser</span><span class="p">.</span><span class="nx">konqueror</span> <span class="o">&&</span> <span class="o">!</span><span class="nx">browser</span><span class="p">.</span><span class="nx">msie</span><span class="p">)</span> <span class="p">{</span></pre></div>
</td>
</tr>
<tr id='section-6'>
<td class=docs>
<div class="pilwrap">
<a class="pilcrow" href="#section-6">¶</a>
</div>
<p>supported</p>
</td>
<td class=code>
<div class='highlight'><pre> <span class="p">}</span> <span class="k">else</span> <span class="p">{</span>
<span class="k">return</span><span class="p">;</span>
<span class="p">}</span></pre></div>
</td>
</tr>
<tr id='section-7'>
<td class=docs>
<div class="pilwrap">
<a class="pilcrow" href="#section-7">¶</a>
</div>
<p>Default options, which can be overridden by specifying them in query params to the loader script.
You can provide any additional options to the loader, and they will be passed to the PageEditor instance when it’s
created, so for instance you could put <code>visible=false</code>, and the editor be hidden after it’s created.</p>
</td>
<td class=code>
<div class='highlight'><pre> <span class="kd">var</span> <span class="nx">options</span> <span class="o">=</span> <span class="p">{</span></pre></div>
</td>
</tr>
<tr id='section-8'>
<td class=docs>
<div class="pilwrap">
<a class="pilcrow" href="#section-8">¶</a>
</div>
<p>A path or url from which the javascripts and css should be loaded.</p>
</td>
<td class=code>
<div class='highlight'><pre> <span class="nx">src</span><span class="o">:</span> <span class="s1">'/assets'</span><span class="p">,</span></pre></div>
</td>
</tr>
<tr id='section-9'>
<td class=docs>
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<a class="pilcrow" href="#section-9">¶</a>
</div>
<p>A value defined in the packages above. Development is used by default. If you want to provide your own package
you can just define one before including this script.</p>
</td>
<td class=code>
<div class='highlight'><pre> <span class="nx">pack</span><span class="o">:</span> <span class="s1">'development'</span>
<span class="p">};</span></pre></div>
</td>
</tr>
<tr id='section-10'>
<td class=docs>
<div class="pilwrap">
<a class="pilcrow" href="#section-10">¶</a>
</div>
<p>Hide the document during loading so there isn’t a flicker while mercury is being loaded.</p>
</td>
<td class=code>
<div class='highlight'><pre> <span class="kd">var</span> <span class="nx">head</span> <span class="o">=</span> <span class="nb">document</span><span class="p">.</span><span class="nx">getElementsByTagName</span><span class="p">(</span><span class="s2">"head"</span><span class="p">)[</span><span class="mi">0</span><span class="p">];</span>
<span class="k">if</span> <span class="p">(</span><span class="nb">window</span> <span class="o">==</span> <span class="nx">top</span><span class="p">)</span> <span class="p">{</span>
<span class="kd">var</span> <span class="nx">style</span> <span class="o">=</span> <span class="nb">document</span><span class="p">.</span><span class="nx">createElement</span><span class="p">(</span><span class="s1">'style'</span><span class="p">);</span>
<span class="kd">var</span> <span class="nx">rules</span> <span class="o">=</span> <span class="nb">document</span><span class="p">.</span><span class="nx">createTextNode</span><span class="p">(</span><span class="s1">'body{visibility:hidden;display:none}'</span><span class="p">);</span>
<span class="nx">style</span><span class="p">.</span><span class="nx">type</span> <span class="o">=</span> <span class="s1">'text/css'</span><span class="p">;</span>
<span class="k">if</span> <span class="p">(</span><span class="nx">style</span><span class="p">.</span><span class="nx">styleSheet</span><span class="p">)</span> <span class="nx">style</span><span class="p">.</span><span class="nx">styleSheet</span><span class="p">.</span><span class="nx">cssText</span> <span class="o">=</span> <span class="nx">rules</span><span class="p">.</span><span class="nx">nodeValue</span><span class="p">;</span>
<span class="k">else</span> <span class="nx">style</span><span class="p">.</span><span class="nx">appendChild</span><span class="p">(</span><span class="nx">rules</span><span class="p">);</span>
<span class="nx">head</span><span class="p">.</span><span class="nx">appendChild</span><span class="p">(</span><span class="nx">style</span><span class="p">);</span>
<span class="p">}</span></pre></div>
</td>
</tr>
<tr id='section-11'>
<td class=docs>
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<p>Because Mercury loads the document it’s going to edit into an iframe we do some tweaks to the current document to
make that feel more seamless.</p>
</td>
<td class=code>
<div class='highlight'><pre> <span class="kd">function</span> <span class="nx">loadMercury</span><span class="p">()</span> <span class="p">{</span>
<span class="k">if</span> <span class="p">(</span><span class="nb">document</span><span class="p">.</span><span class="nx">mercuryLoaded</span><span class="p">)</span> <span class="k">return</span><span class="p">;</span>
<span class="k">if</span> <span class="p">(</span><span class="nx">timer</span><span class="p">)</span> <span class="nb">window</span><span class="p">.</span><span class="nx">clearTimeout</span><span class="p">(</span><span class="nx">timer</span><span class="p">);</span>
<span class="nb">document</span><span class="p">.</span><span class="nx">mercuryLoaded</span> <span class="o">=</span> <span class="kc">true</span><span class="p">;</span></pre></div>
</td>
</tr>
<tr id='section-12'>
<td class=docs>
<div class="pilwrap">
<a class="pilcrow" href="#section-12">¶</a>
</div>
<p>If the current window is the top window, it means that Mercury hasn’t been loaded yet. So we load it.</p>
</td>
<td class=code>
<div class='highlight'><pre> <span class="k">if</span> <span class="p">(</span><span class="nb">window</span> <span class="o">==</span> <span class="nx">top</span><span class="p">)</span> <span class="p">{</span>
<span class="kd">var</span> <span class="nx">i</span><span class="p">;</span></pre></div>
</td>
</tr>
<tr id='section-13'>
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<div class="pilwrap">
<a class="pilcrow" href="#section-13">¶</a>
</div>
<p>Find the loader script and determine what options were provided so the defaults can be overridden. To provide
options just pass them in as query params (eg. <code>mercury_loader.js?src=/asset_path&pack=bundled</code>)</p>
</td>
<td class=code>
<div class='highlight'><pre> <span class="kd">var</span> <span class="nx">scripts</span> <span class="o">=</span> <span class="nb">document</span><span class="p">.</span><span class="nx">getElementsByTagName</span><span class="p">(</span><span class="s1">'script'</span><span class="p">);</span>
<span class="k">for</span> <span class="p">(</span><span class="nx">i</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span> <span class="nx">i</span> <span class="o"><=</span> <span class="nx">scripts</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span><span class="p">;</span> <span class="nx">i</span> <span class="o">+=</span> <span class="mi">1</span><span class="p">)</span> <span class="p">{</span>
<span class="kd">var</span> <span class="nx">match</span> <span class="o">=</span> <span class="nx">scripts</span><span class="p">[</span><span class="nx">i</span><span class="p">].</span><span class="nx">src</span><span class="p">.</span><span class="nx">match</span><span class="p">(</span><span class="sr">/mercury_loader\.js\??(.*)?$/</span><span class="p">);</span>
<span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="nx">match</span> <span class="o">||</span> <span class="o">!</span><span class="nx">match</span><span class="p">[</span><span class="mi">1</span><span class="p">])</span> <span class="k">continue</span><span class="p">;</span>
<span class="nx">match</span><span class="p">[</span><span class="mi">1</span><span class="p">].</span><span class="nx">replace</span><span class="p">(</span><span class="sr">/([^&=]*)=([^&=]*)/g</span><span class="p">,</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">m</span><span class="p">,</span> <span class="nx">attr</span><span class="p">,</span> <span class="nx">value</span><span class="p">)</span> <span class="p">{</span>
<span class="nx">options</span><span class="p">[</span><span class="nx">attr</span><span class="p">]</span> <span class="o">=</span> <span class="nx">value</span><span class="p">;</span>
<span class="p">});</span>
<span class="p">}</span>
<span class="kd">var</span> <span class="nx">pack</span> <span class="o">=</span> <span class="nb">window</span><span class="p">.</span><span class="nx">mercuryPackages</span><span class="p">[</span><span class="nx">options</span><span class="p">.</span><span class="nx">pack</span><span class="p">];</span>
<span class="nx">setTimeout</span><span class="p">(</span><span class="kd">function</span><span class="p">()</span> <span class="p">{</span></pre></div>
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<p>Once we’re ready to load Mercury we clear the document contents, and add in the css and javascript tags.
Once the script has loaded we display the body again, and instantiate a new instance of Mercury.PageEditor.</p>
</td>
<td class=code>
<div class='highlight'><pre> <span class="nb">document</span><span class="p">.</span><span class="nx">body</span><span class="p">.</span><span class="nx">innerHTML</span> <span class="o">=</span> <span class="s1">'<div style="height:0;overflow:hidden;">Mercury</div>'</span><span class="p">;</span>
<span class="k">for</span> <span class="p">(</span><span class="nx">i</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span> <span class="nx">i</span> <span class="o"><=</span> <span class="nb">document</span><span class="p">.</span><span class="nx">styleSheets</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span><span class="p">;</span> <span class="nx">i</span> <span class="o">+=</span> <span class="mi">1</span><span class="p">)</span> <span class="p">{</span>
<span class="nb">document</span><span class="p">.</span><span class="nx">styleSheets</span><span class="p">[</span><span class="nx">i</span><span class="p">].</span><span class="nx">disabled</span> <span class="o">=</span> <span class="kc">true</span><span class="p">;</span>
<span class="p">}</span></pre></div>
</td>
</tr>
<tr id='section-15'>
<td class=docs>
<div class="pilwrap">
<a class="pilcrow" href="#section-15">¶</a>
</div>
<p>Load all the stylesheets.</p>
</td>
<td class=code>
<div class='highlight'><pre> <span class="kd">var</span> <span class="nx">stylesheets</span> <span class="o">=</span> <span class="nx">pack</span><span class="p">.</span><span class="nx">stylesheets</span><span class="p">.</span><span class="nx">split</span><span class="p">(</span><span class="s1">','</span><span class="p">);</span>
<span class="k">for</span> <span class="p">(</span><span class="nx">i</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span> <span class="nx">i</span> <span class="o"><=</span> <span class="nx">stylesheets</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span><span class="p">;</span> <span class="nx">i</span> <span class="o">+=</span> <span class="mi">1</span><span class="p">)</span> <span class="p">{</span>
<span class="kd">var</span> <span class="nx">link</span> <span class="o">=</span> <span class="nb">document</span><span class="p">.</span><span class="nx">createElement</span><span class="p">(</span><span class="s1">'link'</span><span class="p">);</span>
<span class="nx">link</span><span class="p">.</span><span class="nx">href</span> <span class="o">=</span> <span class="nx">options</span><span class="p">.</span><span class="nx">src</span> <span class="o">+</span> <span class="s1">'/'</span> <span class="o">+</span> <span class="nx">stylesheets</span><span class="p">[</span><span class="nx">i</span><span class="p">];</span>
<span class="nx">link</span><span class="p">.</span><span class="nx">media</span> <span class="o">=</span> <span class="s1">'screen'</span><span class="p">;</span>
<span class="nx">link</span><span class="p">.</span><span class="nx">rel</span> <span class="o">=</span> <span class="s1">'stylesheet'</span><span class="p">;</span>
<span class="nx">link</span><span class="p">.</span><span class="nx">type</span> <span class="o">=</span> <span class="s1">'text/css'</span><span class="p">;</span>
<span class="nx">head</span><span class="p">.</span><span class="nx">appendChild</span><span class="p">(</span><span class="nx">link</span><span class="p">);</span>
<span class="p">}</span></pre></div>
</td>
</tr>
<tr id='section-16'>
<td class=docs>
<div class="pilwrap">
<a class="pilcrow" href="#section-16">¶</a>
</div>
<p>Load all the javascripts.</p>
</td>
<td class=code>
<div class='highlight'><pre> <span class="kd">var</span> <span class="nx">javascripts</span> <span class="o">=</span> <span class="nx">pack</span><span class="p">.</span><span class="nx">javascripts</span><span class="p">.</span><span class="nx">split</span><span class="p">(</span><span class="s1">','</span><span class="p">);</span>
<span class="kd">var</span> <span class="nx">loaded</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span>
<span class="kd">function</span> <span class="nx">loadScript</span><span class="p">(</span><span class="nx">src</span><span class="p">)</span> <span class="p">{</span>
<span class="kd">var</span> <span class="nx">script</span> <span class="o">=</span> <span class="nb">document</span><span class="p">.</span><span class="nx">createElement</span><span class="p">(</span><span class="s1">'script'</span><span class="p">);</span>
<span class="nx">script</span><span class="p">.</span><span class="nx">src</span> <span class="o">=</span> <span class="nx">options</span><span class="p">.</span><span class="nx">src</span> <span class="o">+</span> <span class="s1">'/'</span> <span class="o">+</span> <span class="nx">src</span><span class="p">;</span>
<span class="nx">script</span><span class="p">.</span><span class="nx">type</span> <span class="o">=</span> <span class="s1">'text/javascript'</span><span class="p">;</span>
<span class="nx">script</span><span class="p">.</span><span class="nx">charset</span> <span class="o">=</span> <span class="s1">'utf-8'</span><span class="p">;</span>
<span class="nx">head</span><span class="p">.</span><span class="nx">appendChild</span><span class="p">(</span><span class="nx">script</span><span class="p">);</span>
<span class="nx">script</span><span class="p">.</span><span class="nx">onload</span> <span class="o">=</span> <span class="kd">function</span><span class="p">()</span> <span class="p">{</span>
<span class="nx">loaded</span> <span class="o">+=</span> <span class="mi">1</span><span class="p">;</span>
<span class="k">if</span> <span class="p">(</span><span class="nx">loaded</span> <span class="o">>=</span> <span class="nx">javascripts</span><span class="p">.</span><span class="nx">length</span><span class="p">)</span> <span class="p">{</span>
<span class="nb">document</span><span class="p">.</span><span class="nx">body</span><span class="p">.</span><span class="nx">style</span><span class="p">.</span><span class="nx">visibility</span> <span class="o">=</span> <span class="s1">'visible'</span><span class="p">;</span>
<span class="nb">document</span><span class="p">.</span><span class="nx">body</span><span class="p">.</span><span class="nx">style</span><span class="p">.</span><span class="nx">display</span> <span class="o">=</span> <span class="s1">'block'</span><span class="p">;</span></pre></div>
</td>
</tr>
<tr id='section-17'>
<td class=docs>
<div class="pilwrap">
<a class="pilcrow" href="#section-17">¶</a>
</div>
<p>Instantiate the PageEditor, passing in the options that were provided to the loader.</p>
</td>
<td class=code>
<div class='highlight'><pre> <span class="k">new</span> <span class="nx">Mercury</span><span class="p">.</span><span class="nx">PageEditor</span><span class="p">(</span><span class="kc">null</span><span class="p">,</span> <span class="nx">options</span><span class="p">);</span></pre></div>
</td>
</tr>
<tr id='section-18'>
<td class=docs>
<div class="pilwrap">
<a class="pilcrow" href="#section-18">¶</a>
</div>
<p>If there’s a mercuryLoaded function available, call it. You can provide one before the loading script
and it will be called after everything is loaded, but before everything is initialized. You can bind
to the mercury:ready event or use Mercury.bind(‘ready’, function() {}).</p>
</td>
<td class=code>
<div class='highlight'><pre> <span class="k">if</span> <span class="p">(</span><span class="k">typeof</span><span class="p">(</span><span class="nb">window</span><span class="p">.</span><span class="nx">mercuryLoaded</span><span class="p">)</span> <span class="o">==</span> <span class="s1">'function'</span><span class="p">)</span> <span class="p">{</span>
<span class="nb">window</span><span class="p">.</span><span class="nx">mercuryLoaded</span><span class="p">();</span>
<span class="p">}</span>
<span class="p">}</span> <span class="k">else</span> <span class="p">{</span>
<span class="nx">loadScript</span><span class="p">(</span><span class="nx">javascripts</span><span class="p">[</span><span class="nx">loaded</span><span class="p">]);</span>
<span class="p">}</span>
<span class="p">};</span>
<span class="p">}</span>
<span class="nx">loadScript</span><span class="p">(</span><span class="nx">javascripts</span><span class="p">[</span><span class="nx">loaded</span><span class="p">]);</span>
<span class="p">},</span> <span class="mi">1</span><span class="p">);</span>
<span class="p">}</span> <span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="nx">top</span><span class="p">.</span><span class="nx">Mercury</span><span class="p">)</span> <span class="p">{</span></pre></div>
</td>
</tr>
<tr id='section-19'>
<td class=docs>
<div class="pilwrap">
<a class="pilcrow" href="#section-19">¶</a>
</div>
<p>Since this file will be included in the iframe as well, we use it to tell Mercury that the document is ready to
be worked on. By firing this event we’re able to build the regions and get everything ready without having to
wait for assets and slow javascripts to load or complete.</p>
</td>
<td class=code>
<div class='highlight'><pre> <span class="nb">window</span><span class="p">.</span><span class="nx">Mercury</span> <span class="o">=</span> <span class="nx">top</span><span class="p">.</span><span class="nx">Mercury</span><span class="p">;</span>
<span class="nx">Mercury</span><span class="p">.</span><span class="nx">trigger</span><span class="p">(</span><span class="s1">'initialize:frame'</span><span class="p">);</span>
<span class="p">}</span>
<span class="p">}</span></pre></div>
</td>
</tr>
<tr id='section-20'>
<td class=docs>
<div class="pilwrap">
<a class="pilcrow" href="#section-20">¶</a>
</div>
<p>This is a common technique for determining if the document has loaded yet, and is based on the methods used in
Prototype.js. The following portions just call loadMercury once it’s appropriate to do so.</p>
<p>Support for the DOMContentLoaded event is based on work by Dan Webb, Matthias Miller, Dean Edwards, John Resig,
and Diego Perini.</p>
</td>
<td class=code>
<div class='highlight'><pre> <span class="kd">var</span> <span class="nx">timer</span><span class="p">;</span>
<span class="kd">function</span> <span class="nx">checkReadyState</span><span class="p">()</span> <span class="p">{</span>
<span class="k">if</span> <span class="p">(</span><span class="nb">document</span><span class="p">.</span><span class="nx">readyState</span> <span class="o">===</span> <span class="s1">'complete'</span><span class="p">)</span> <span class="p">{</span>
<span class="nb">document</span><span class="p">.</span><span class="nx">stopObserving</span><span class="p">(</span><span class="s1">'readystatechange'</span><span class="p">,</span> <span class="nx">checkReadyState</span><span class="p">);</span>
<span class="nx">loadMercury</span><span class="p">();</span>
<span class="p">}</span>
<span class="p">}</span>
<span class="kd">function</span> <span class="nx">pollDoScroll</span><span class="p">()</span> <span class="p">{</span>
<span class="k">try</span> <span class="p">{</span> <span class="nb">document</span><span class="p">.</span><span class="nx">documentElement</span><span class="p">.</span><span class="nx">doScroll</span><span class="p">(</span><span class="s1">'left'</span><span class="p">);</span> <span class="p">}</span>
<span class="k">catch</span><span class="p">(</span><span class="nx">e</span><span class="p">)</span> <span class="p">{</span>
<span class="nx">timer</span> <span class="o">=</span> <span class="nx">pollDoScroll</span><span class="p">.</span><span class="nx">defer</span><span class="p">();</span>
<span class="k">return</span><span class="p">;</span>
<span class="p">}</span>
<span class="nx">loadMercury</span><span class="p">();</span>
<span class="p">}</span>
<span class="k">if</span> <span class="p">(</span><span class="nb">document</span><span class="p">.</span><span class="nx">addEventListener</span><span class="p">)</span> <span class="p">{</span>
<span class="nb">document</span><span class="p">.</span><span class="nx">addEventListener</span><span class="p">(</span><span class="s1">'DOMContentLoaded'</span><span class="p">,</span> <span class="nx">loadMercury</span><span class="p">,</span> <span class="kc">false</span><span class="p">);</span>
<span class="p">}</span> <span class="k">else</span> <span class="p">{</span>
<span class="nb">document</span><span class="p">.</span><span class="nx">observe</span><span class="p">(</span><span class="s1">'readystatechange'</span><span class="p">,</span> <span class="nx">checkReadyState</span><span class="p">);</span>
<span class="k">if</span> <span class="p">(</span><span class="nb">window</span> <span class="o">==</span> <span class="nx">top</span><span class="p">)</span> <span class="p">{</span> <span class="nx">timer</span> <span class="o">=</span> <span class="nx">pollDoScroll</span><span class="p">.</span><span class="nx">defer</span><span class="p">();</span> <span class="p">}</span>
<span class="p">}</span>
<span class="p">})();</span></pre></div>
</td>
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