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content/glyph/book/text_editing/code.html

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<!DOCTYPE html> 
<html lang="en"> 
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		<title>Source Code &ndash; Glyph Documentation</title> 



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					/<a href="/glyph/" rel="archives">GLYPH</a> 
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				<header> 
					<hgroup> 
					<h1>Source Code</h1> 
					<h2>Glyph Documentation</h2>
					</hgroup> 
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				<section id="body-text" class="hyphenate glyph-book"> 

							<nav><a href="/glyph/book/text_editing/images.html">Images and Figures &larr;</a><a href="/glyph/book/index.html">Contents</a><a href="/glyph/book/text_editing/raw_html.html">&rarr; Textile or Markdown</a></nav>
								<p>If you&#8217;re a programmer, chances are that you&#8217;re going to include some source code in your articles and books. Glyph offers two ways to format code blocks effortlessly: the <a href="/glyph/book/macros/macros_block.html#m_codeblock"><code>codeblock</code></a> macro, which simply wraps text into <code>&lt;pre&gt;</code> and <code>&lt;code&gt;</code> tags, or the <a href="/glyph/book/macros/macros_filters.html#m_highlight"><code>highlight</code></a> macro. The last one requires either <a href="http://coderay.rubychan.de/">Coderay</a> or <a href="http://ultraviolet.rubyforge.org/">Ultraviolet</a>, but it provides syntax highlighting for the most common programming languages.</p>
<p>Cosider the following piece of ruby code:</p>
	<div class="CodeRay">
  <div class="code"><pre><span class="no">1</span> def find_child(&amp;block)
<span class="no">2</span>   children.each do |c|
<span class="no">3</span>     c.descend do |node, level|
<span class="no">4</span>       return node if block.call(node)
<span class="no">5</span>     end
<span class="no">6</span>   end
<span class="no">7</span>   nil
<span class="no">8</span> end</pre></div>
</div>

	<p>It can be wrapped in a highlight macro, like so:</p>
	<div class="CodeRay">
  <div class="code"><pre><span class="no"> 1</span> highlight[=ruby|
<span class="no"> 2</span>   def find_child(&amp;block)
<span class="no"> 3</span>     children.each do |c|
<span class="no"> 4</span>       c.descend do |node, level|
<span class="no"> 5</span>         return node if block.call(node)
<span class="no"> 6</span>       end
<span class="no"> 7</span>     end
<span class="no"> 8</span>     nil
<span class="no"> 9</span>   end
<span class="no"><strong>10</strong></span> =]</pre></div>
</div>

	<p>...to produce the following, using the coderay highlighter:</p>
	<div class="CodeRay">
  <div class="code"><pre><span class="no">1</span> <span class="r">def</span> <span class="fu">find_child</span>(&amp;block)
<span class="no">2</span>   children.each <span class="r">do</span> |c|
<span class="no">3</span>     c.descend <span class="r">do</span> |node, level|
<span class="no">4</span>       <span class="r">return</span> node <span class="r">if</span> block.call(node)
<span class="no">5</span>     <span class="r">end</span>
<span class="no">6</span>   <span class="r">end</span>
<span class="no">7</span>   <span class="pc">nil</span>
<span class="no">8</span> <span class="r">end</span></pre></div>
</div>

	<aside class="box">
<div class="box-title">Some Remarks</div>
<ul>
	<li>Highlighters require some configuration. For more information on relevant configuration settings, see the <a href="/glyph/book/config/filters.html#cfg_filters">filters.*</a> configuration settings.</li>
	<li>If you&#8217;re using the <a href="/glyph/book/macros/macros_filters.html#m_highlight"><code>highlight</code></a> macro together within the <a href="/glyph/book/macros/macros_filters.html#m_textile"><code>textile</code></a> macro, you must wrap the macro call within <code>&lt;notextile&gt;</code> tags.</li>
	<li>You must always escape pipes (<code>|</code>) with the code or the highlight macro.</li>
</ul>

</aside>
							<nav><a href="/glyph/book/text_editing/images.html">Images and Figures &larr;</a><a href="/glyph/book/index.html">Contents</a><a href="/glyph/book/text_editing/raw_html.html">&rarr; Textile or Markdown</a></nav>
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