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<!DOCTYPE html>
<html>
<head>
<meta content="Flexible Nav is a jQuery library which uses HTML5 nav element to improve navigation and visualization of an HTML document." name="Description"/>
<meta content="flexible nav jquery javascript library JS HTML5 CSS" name="Keywords"/>
<title>Flexible Nav jQuery library</title>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<link rel="stylesheet" media="all" href="docco.css" />
<link rel="stylesheet" media="all" href="demo.css" />
<link rel="stylesheet" media="all" href="flexible-nav.min.css" />
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.6/jquery.min.js"></script>
<script type="text/javascript" src="flexible-nav.min.js"></script>
<script type="text/javascript">
$(function(){
new FlexibleNav( new FlexibleNavMaker().make().prependTo('body') );
});
</script>
<script type="text/javascript">
/* <![CDATA[ */
(function() {
var s = document.createElement('script'), t = document.getElementsByTagName('script')[0];
s.type = 'text/javascript';
s.async = true;
s.src = 'http://api.flattr.com/js/0.6/load.js?mode=auto';
t.parentNode.insertBefore(s, t);
})();
/* ]]> */
</script>
</head>
<body>
<div id="container">
<div id="background"></div>
<div style="margin: 10px 50px;">
<a class="FlattrButton" style="display:none;" href="http://demo.greweb.fr/flexible-nav"></a>
<noscript><a href="http://flattr.com/thing/419255/Flexible-Nav-library" target="_blank">
<img src="http://api.flattr.com/button/flattr-badge-large.png" alt="Flattr this" title="Flattr this" border="0" /></a></noscript>
</div>
<table cellpadding="0" cellspacing="0">
<tbody>
<tr id="section-1">
<td class="docs">
<div class="pilwrap">
<a class="pilcrow" href="#section-1">¶</a>
</div>
<h1>Flexible Nav jQuery library.</h1>
<p><strong>Flexible Nav</strong> is a small <strong>jQuery</strong> library
which add a smart navigation bar on the right of the page.
It improves a web page <strong>navigation</strong> and helps
to <strong>visualize</strong> different sections
of a document, an article,.. any web page.</p>
<p>Nav links are <strong>distributed proportionally</strong> to the page sections.
See how <strong>your scrollbar <em>"weds"</em> these links</strong> :)</p>
<hr />
<p>You can easily use it on any website with the <em>Bookmarklet</em>.</p>
<p><strong>Save this bookmark</strong> by drag and dropping it in your bar...</p>
<p><a class="bookmark" title="Flexible Nav bookmarklet" href="javascript:(function(){window.flexibleNavBase='http://gre.github.io/flexible-nav/lib/';var a=document.getElementsByTagName('head')[0],b=document.createElement('script');b.type='text/javascript';b.src=flexibleNavBase+'bookmarklet.min.js';a.appendChild(b);})(); void 0" target="_blank">FlexibleNav bookmarklet</a></p>
<p>...and <strong>click on it in any website</strong>!</p>
<hr />
<p><strong>This page is a 3-in-one document!</strong></p>
<ul>
<li>First, it explains goals and possible usages of the library.</li>
<li>Second, it presents <strong>a library usage</strong>
<em>(see this flexible box right panel?)</em>.</li>
<li>Third, it shows the <strong>annotated JS code</strong> <em>(thanks to docco)</em></li>
</ul>
<h2>Download</h2>
<p>You can also use it in your websites.</p>
<p><a class="download" target="_blank" href="https://github.com/gre/flexible-nav">Download or fork me on github</a></p>
<h2>Usages</h2>
<h4>Generation and Flexibility</h4>
<p>The library can generate for you the nav sidebar content
providing elements to display in navigation.</p>
<p>By default, it uses <code>h1</code> to <code>h3</code> elements to retrieve and locate
the different sections of a document but you can override these
elements selector.</p>
<p>You have usually two kind of selected elements to use:</p>
<ul>
<li><strong>Select a title</strong>. The link will take the title as text.</li>
<li><strong>Select any container</strong> and add a <strong><code>data-navtext</code> attribute</strong>
to define the title you want.</li>
</ul>
<p>Example: <code><div id="demo" data-navtext="Demo of the game">...</code></p>
<ul>
<li><p><strong>Simple usage used in this page</strong></p>
<pre><code>var nav = new FlexibleNavMaker().make().prependTo('body');
new FlexibleNav(nav);
</code></pre></li>
<li><p><strong>Selecting element you want</strong></p>
<pre><code>new FlexibleNavMaker(".navtitle");
</code></pre></li>
</ul>
<p>Using this code bellow, all nodes having this <code>navtitle</code> class
will appear in the flexible nav panel.</p>
<h4>Flexibility only</h4>
<p>You can also create your own nav links to have more controls of used links.
Conventionnally, you need to use
a <code><nav /></code> element with a <code>flexible-nav</code> class and <code><a href="#myidtarget" /></code> kind of elements for links.</p>
<ul>
<li><p><strong>Add flexibility to an existing nav</strong></p>
<pre><code>new FlexibleNav($('#myNav'));
</code></pre></li>
</ul>
<p><em>(replace myNav by you nav id)</em></p>
</td>
<td class="code">
<div class="highlight"><pre><span class="cm">/*!</span>
<span class="cm"> * Flexible Nav - 2011 - by @greweb</span>
<span class="cm"> * http://www.apache.org/licenses/LICENSE-2.0</span>
<span class="cm"> */</span></pre></div>
</td>
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<h1>The code</h1>
</td>
<td class="code">
<div class="highlight"><pre><span class="p">(</span><span class="kd">function</span><span class="p">(</span><span class="nx">$</span><span class="p">){</span>
<span class="s2">"use strict"</span><span class="p">;</span></pre></div>
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<p><strong>Utilities functions</strong></p>
<p>Generate an unique number identifier</p>
</td>
<td class="code">
<div class="highlight"><pre> <span class="kd">var</span> <span class="nx">_uuid</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span>
<span class="kd">var</span> <span class="nx">uuid</span> <span class="o">=</span> <span class="kd">function</span><span class="p">(){</span> <span class="k">return</span> <span class="o">++</span><span class="nx">_uuid</span><span class="p">;</span> <span class="p">};</span></pre></div>
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<p>Template for creating a nav element with links.</p>
<ul>
<li><code>links</code> : an Array of <em>{ href, text }</em></li>
</ul>
</td>
<td class="code">
<div class="highlight"><pre> <span class="kd">var</span> <span class="nx">tmplNav</span> <span class="o">=</span> <span class="kd">function</span><span class="p">(</span><span class="nx">links</span><span class="p">)</span> <span class="p">{</span>
<span class="kd">var</span> <span class="nx">nav</span> <span class="o">=</span> <span class="nx">$</span><span class="p">(</span><span class="s1">'<nav class="flexible-nav"><ul></ul></nav>'</span><span class="p">);</span>
<span class="kd">var</span> <span class="nx">lis</span> <span class="o">=</span> <span class="nx">$</span><span class="p">.</span><span class="nx">map</span><span class="p">(</span><span class="nx">links</span><span class="p">,</span> <span class="kd">function</span><span class="p">(</span><span class="nx">link</span><span class="p">){</span>
<span class="k">return</span> <span class="nx">$</span><span class="p">(</span><span class="s1">'<li><a href="'</span><span class="o">+</span><span class="nx">link</span><span class="p">.</span><span class="nx">href</span><span class="o">+</span><span class="s1">'">'</span><span class="o">+</span><span class="nx">link</span><span class="p">.</span><span class="nx">text</span><span class="o">+</span><span class="s1">'</a></li>'</span><span class="p">)[</span><span class="mi">0</span><span class="p">];</span>
<span class="p">});</span>
<span class="nx">nav</span><span class="p">.</span><span class="nx">find</span><span class="p">(</span><span class="s1">'ul'</span><span class="p">).</span><span class="nx">append</span><span class="p">(</span><span class="nx">lis</span><span class="p">);</span>
<span class="k">return</span> <span class="nx">nav</span><span class="p">;</span>
<span class="p">}</span>
</pre></div>
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<p>Retrieve a node pointed by an a element <code>aEl</code> hash href.</p>
</td>
<td class="code">
<div class="highlight"><pre> <span class="kd">var</span> <span class="nx">targetForLink</span> <span class="o">=</span> <span class="kd">function</span><span class="p">(</span><span class="nx">aEl</span><span class="p">)</span> <span class="p">{</span>
<span class="kd">var</span> <span class="nx">href</span> <span class="o">=</span> <span class="nx">$</span><span class="p">(</span><span class="nx">aEl</span><span class="p">).</span><span class="nx">attr</span><span class="p">(</span><span class="s1">'href'</span><span class="p">);</span>
<span class="k">if</span><span class="p">(</span><span class="nx">href</span><span class="p">.</span><span class="nx">substring</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span><span class="mi">1</span><span class="p">)</span> <span class="o">==</span> <span class="s1">'#'</span><span class="p">)</span> <span class="p">{</span>
<span class="kd">var</span> <span class="nx">target</span> <span class="o">=</span> <span class="nx">$</span><span class="p">(</span><span class="nx">href</span><span class="p">);</span>
<span class="k">return</span> <span class="nx">target</span><span class="p">.</span><span class="nx">size</span><span class="p">()</span> <span class="o">?</span> <span class="nx">target</span> <span class="o">:</span> <span class="kc">null</span><span class="p">;</span>
<span class="p">}</span>
<span class="k">return</span> <span class="kc">null</span><span class="p">;</span>
<span class="p">}</span></pre></div>
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<h2>FlexibleNavMaker</h2>
<p>Dynamically create a nav.</p>
<ul>
<li><code>selector</code> (optional) : selector for all nodes to add in nav.
using <code>h1, h2, h3</code> if not setted.</li>
</ul>
</td>
<td class="code">
<div class="highlight"><pre> <span class="nb">window</span><span class="p">.</span><span class="nx">FlexibleNavMaker</span> <span class="o">=</span> <span class="kd">function</span><span class="p">(</span><span class="nx">selector</span><span class="p">)</span> <span class="p">{</span>
<span class="kd">var</span> <span class="nx">self</span> <span class="o">=</span> <span class="k">this</span><span class="p">;</span>
<span class="nx">self</span><span class="p">.</span><span class="nx">nodes</span> <span class="o">=</span> <span class="nx">$</span><span class="p">(</span><span class="nx">selector</span> <span class="o">||</span> <span class="s1">'h1,h2,h3'</span><span class="p">);</span>
</pre></div>
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<h3>.make()</h3>
<p>An instance of FlexibleNavMaker contains only a <code>make</code> method
which create the nav element with nodes matching <code>selector</code>.</p>
</td>
<td class="code">
<div class="highlight"><pre> <span class="nx">self</span><span class="p">.</span><span class="nx">make</span> <span class="o">=</span> <span class="kd">function</span><span class="p">()</span> <span class="p">{</span>
<span class="kd">var</span> <span class="nx">links</span> <span class="o">=</span> <span class="nx">self</span><span class="p">.</span><span class="nx">nodes</span><span class="p">.</span><span class="nx">map</span><span class="p">(</span><span class="kd">function</span><span class="p">(){</span>
<span class="kd">var</span> <span class="nx">node</span> <span class="o">=</span> <span class="nx">$</span><span class="p">(</span><span class="k">this</span><span class="p">);</span></pre></div>
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<p>Find the id or create a unique one</p>
</td>
<td class="code">
<div class="highlight"><pre> <span class="kd">var</span> <span class="nx">id</span> <span class="o">=</span> <span class="nx">node</span><span class="p">.</span><span class="nx">attr</span><span class="p">(</span><span class="s1">'id'</span><span class="p">);</span>
<span class="k">if</span><span class="p">(</span><span class="o">!</span><span class="nx">id</span><span class="p">)</span> <span class="p">{</span>
<span class="k">while</span><span class="p">(</span><span class="o">!</span><span class="nx">id</span><span class="p">)</span> <span class="p">{</span>
<span class="nx">id</span> <span class="o">=</span> <span class="s1">'n'</span><span class="o">+</span><span class="p">(</span> <span class="nx">uuid</span><span class="p">()</span> <span class="p">);</span>
<span class="k">if</span><span class="p">(</span><span class="nx">$</span><span class="p">(</span><span class="s1">'#'</span><span class="o">+</span><span class="nx">id</span><span class="p">).</span><span class="nx">size</span><span class="p">()</span><span class="o">></span><span class="mi">0</span><span class="p">)</span> <span class="nx">id</span> <span class="o">=</span> <span class="kc">null</span><span class="p">;</span>
<span class="p">}</span>
<span class="nx">node</span><span class="p">.</span><span class="nx">attr</span><span class="p">(</span><span class="s1">'id'</span><span class="p">,</span> <span class="nx">id</span><span class="p">);</span>
<span class="p">}</span></pre></div>
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<p>The text link is the <code>data-navtext</code> attribute or the node text.</p>
</td>
<td class="code">
<div class="highlight"><pre> <span class="kd">var</span> <span class="nx">text</span> <span class="o">=</span> <span class="nx">node</span><span class="p">.</span><span class="nx">attr</span><span class="p">(</span><span class="s1">'data-navtext'</span><span class="p">)</span> <span class="o">||</span> <span class="nx">node</span><span class="p">.</span><span class="nx">text</span><span class="p">();</span>
<span class="k">return</span> <span class="p">{</span> <span class="nx">href</span><span class="o">:</span> <span class="s1">'#'</span><span class="o">+</span><span class="nx">id</span><span class="p">,</span> <span class="nx">text</span><span class="o">:</span> <span class="nx">text</span> <span class="p">};</span>
<span class="p">});</span>
<span class="k">return</span> <span class="nx">tmplNav</span><span class="p">(</span><span class="nx">links</span><span class="p">);</span>
<span class="p">}</span>
<span class="p">}</span></pre></div>
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<h2>FlexibleNav</h2>
<p>Make a nav element "flexible".</p>
<ul>
<li><code>nav</code> : a nav DOM element</li>
</ul>
</td>
<td class="code">
<div class="highlight"><pre> <span class="nb">window</span><span class="p">.</span><span class="nx">FlexibleNav</span> <span class="o">=</span> <span class="kd">function</span><span class="p">(</span><span class="nx">nav</span><span class="p">)</span> <span class="p">{</span>
<span class="kd">var</span> <span class="nx">self</span> <span class="o">=</span> <span class="k">this</span><span class="p">;</span>
<span class="nx">self</span><span class="p">.</span><span class="nx">nav</span> <span class="o">=</span> <span class="nx">$</span><span class="p">(</span><span class="nx">nav</span><span class="p">);</span></pre></div>
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<p>Init links adding some classes.</p>
<p>Set the target node name class.
Example: class <code>tnn-h1</code></p>
</td>
<td class="code">
<div class="highlight"><pre> <span class="nx">self</span><span class="p">.</span><span class="nx">updateClasses</span> <span class="o">=</span> <span class="kd">function</span><span class="p">()</span> <span class="p">{</span>
<span class="nx">self</span><span class="p">.</span><span class="nx">nav</span><span class="p">.</span><span class="nx">find</span><span class="p">(</span><span class="s1">'a'</span><span class="p">).</span><span class="nx">each</span><span class="p">(</span><span class="kd">function</span><span class="p">(){</span>
<span class="kd">var</span> <span class="nx">node</span> <span class="o">=</span> <span class="nx">$</span><span class="p">(</span><span class="k">this</span><span class="p">);</span>
<span class="kd">var</span> <span class="nx">target</span> <span class="o">=</span> <span class="nx">targetForLink</span><span class="p">(</span><span class="nx">node</span><span class="p">);</span>
<span class="k">if</span><span class="p">(</span><span class="nx">target</span><span class="p">)</span> <span class="p">{</span>
<span class="nx">node</span><span class="p">.</span><span class="nx">addClass</span><span class="p">(</span><span class="s1">'tnn-'</span><span class="o">+</span><span class="nx">target</span><span class="p">[</span><span class="mi">0</span><span class="p">].</span><span class="nx">nodeName</span><span class="p">.</span><span class="nx">toLowerCase</span><span class="p">());</span>
<span class="p">}</span>
<span class="p">});</span>
<span class="p">}</span></pre></div>
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<h3>.update()</h3>
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<div class="highlight"><pre> <span class="nx">self</span><span class="p">.</span><span class="nx">update</span> <span class="o">=</span> <span class="kd">function</span><span class="p">()</span> <span class="p">{</span>
<span class="kd">var</span> <span class="nx">documentHeight</span> <span class="o">=</span> <span class="nx">$</span><span class="p">(</span><span class="nb">document</span><span class="p">).</span><span class="nx">height</span><span class="p">();</span>
<span class="kd">var</span> <span class="nx">windowHeight</span> <span class="o">=</span> <span class="nx">$</span><span class="p">(</span><span class="nb">window</span><span class="p">).</span><span class="nx">height</span><span class="p">();</span>
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<tr id="section-13">
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<p>Transform links into array of visible target <code>top</code> position and link <code>node</code>.</p>
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<div class="highlight"><pre> <span class="kd">var</span> <span class="nx">links</span> <span class="o">=</span> <span class="nx">self</span><span class="p">.</span><span class="nx">nav</span><span class="p">.</span><span class="nx">find</span><span class="p">(</span><span class="s1">'a'</span><span class="p">).</span><span class="nx">map</span><span class="p">(</span><span class="kd">function</span><span class="p">(){</span>
<span class="kd">var</span> <span class="nx">node</span> <span class="o">=</span> <span class="nx">$</span><span class="p">(</span><span class="k">this</span><span class="p">);</span>
<span class="kd">var</span> <span class="nx">target</span> <span class="o">=</span> <span class="nx">targetForLink</span><span class="p">(</span><span class="nx">node</span><span class="p">);</span>
<span class="k">if</span><span class="p">(</span><span class="nx">target</span><span class="o">==</span><span class="kc">null</span> <span class="o">||</span> <span class="o">!</span><span class="nx">target</span><span class="p">.</span><span class="nx">is</span><span class="p">(</span><span class="s1">':visible'</span><span class="p">))</span> <span class="k">return</span> <span class="kc">null</span><span class="p">;</span>
<span class="k">return</span> <span class="p">{</span>
<span class="nx">top</span><span class="o">:</span> <span class="nx">target</span><span class="p">.</span><span class="nx">offset</span><span class="p">().</span><span class="nx">top</span><span class="p">,</span>
<span class="nx">node</span><span class="o">:</span> <span class="nx">node</span>
<span class="p">};</span>
<span class="p">});</span></pre></div>
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<tr id="section-14">
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<p>Update nav link positions.</p>
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<td class="code">
<div class="highlight"><pre> <span class="nx">$</span><span class="p">.</span><span class="nx">each</span><span class="p">(</span><span class="nx">links</span><span class="p">,</span> <span class="kd">function</span><span class="p">(</span><span class="nx">i</span><span class="p">,</span> <span class="nx">link</span><span class="p">)</span> <span class="p">{</span>
<span class="nx">link</span><span class="p">.</span><span class="nx">node</span><span class="p">.</span><span class="nx">css</span><span class="p">(</span><span class="s1">'top'</span><span class="p">,</span> <span class="p">(</span><span class="mi">100</span><span class="o">*</span><span class="nx">link</span><span class="p">.</span><span class="nx">top</span><span class="o">/</span><span class="nx">documentHeight</span><span class="p">)</span><span class="o">+</span><span class="s1">'%'</span><span class="p">);</span>
<span class="p">});</span></pre></div>
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<p>Update current section.</p>
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<td class="code">
<div class="highlight"><pre> <span class="kd">var</span> <span class="nx">scrollTop</span> <span class="o">=</span> <span class="nx">$</span><span class="p">(</span><span class="nb">document</span><span class="p">).</span><span class="nx">scrollTop</span><span class="p">();</span>
<span class="kd">var</span> <span class="nx">closest</span> <span class="o">=</span> <span class="kc">null</span><span class="p">;</span>
<span class="nx">$</span><span class="p">.</span><span class="nx">each</span><span class="p">(</span><span class="nx">links</span><span class="p">,</span> <span class="kd">function</span><span class="p">(</span><span class="nx">i</span><span class="p">,</span> <span class="nx">link</span><span class="p">){</span>
<span class="nx">link</span><span class="p">.</span><span class="nx">node</span><span class="p">.</span><span class="nx">removeClass</span><span class="p">(</span><span class="s1">'current'</span><span class="p">);</span>
<span class="k">if</span><span class="p">(</span><span class="nx">closest</span><span class="o">==</span><span class="kc">null</span> <span class="o">||</span> <span class="p">(</span><span class="nx">link</span><span class="p">.</span><span class="nx">top</span> <span class="o"><=</span> <span class="nx">scrollTop</span><span class="o">+</span><span class="mi">10</span> <span class="o">&&</span> <span class="nx">link</span><span class="p">.</span><span class="nx">top</span> <span class="o">></span> <span class="nx">closest</span><span class="p">.</span><span class="nx">top</span><span class="p">))</span>
<span class="nx">closest</span> <span class="o">=</span> <span class="nx">link</span><span class="p">;</span>
<span class="p">});</span>
<span class="nx">closest</span> <span class="o">&&</span> <span class="nx">closest</span><span class="p">.</span><span class="nx">node</span><span class="p">.</span><span class="nx">addClass</span><span class="p">(</span><span class="s1">'current'</span><span class="p">);</span>
<span class="p">}</span></pre></div>
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<h3>Init</h3>
<p>Bind scroll event and init nav.</p>
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<td class="code">
<div class="highlight"><pre> <span class="nx">$</span><span class="p">(</span><span class="nb">window</span><span class="p">).</span><span class="nx">scroll</span><span class="p">(</span><span class="kd">function</span><span class="p">(){</span>
<span class="nx">self</span><span class="p">.</span><span class="nx">update</span><span class="p">();</span>
<span class="p">});</span>
<span class="nx">self</span><span class="p">.</span><span class="nx">updateClasses</span><span class="p">();</span>
<span class="nx">self</span><span class="p">.</span><span class="nx">update</span><span class="p">();</span>
<span class="p">}</span>
<span class="p">}(</span><span class="nx">jQuery</span><span class="p">));</span>
</pre></div>
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