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<h1>Source Code</h1>
<h2>Glyph Documentation</h2>
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<nav><a href="/glyph/book/text_editing/images.html">Images and Figures ←</a><a href="/glyph/book/index.html">Contents</a><a href="/glyph/book/text_editing/raw_html.html">→ Textile or Markdown</a></nav>
<p>If you’re a programmer, chances are that you’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><pre></code> and <code><code></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(&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>
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<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(&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>(&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>
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<div class="box-title">Some Remarks</div>
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<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’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><notextile></code> tags.</li>
<li>You must always escape pipes (<code>|</code>) with the code or the highlight macro.</li>
</ul>
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