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content/glyph/book/extending/bookmarks_headers.html

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<!DOCTYPE html> 
<html lang="en"> 
	<head> 
		<title>Glyph - Bookmarks and Headers</title> 



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				<header> 
					<hgroup> 
					<h1>Bookmarks and Headers</h1> 
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							<nav><a href="/glyph/book/extending/params_attrs.html">Parameters and Attributes &larr;</a><a href="/glyph/book/index.html">Contents</a><a href="/glyph/book/extending/placeholders.html">&rarr; Using Placeholders</a></nav>
								<p>The <a href="http://yardoc.org/docs/h3rald-glyph/Macro"><code>Glyph::Macro</code></a> class also includes a few methods to check and store bookmarks and headers. Consider for example the following source code for the <a href="/glyph/book/macros/macros_inline.html#m_anchor"><code>anchor</code></a> macro:</p>

	<div class="CodeRay">
  <div class="code"><pre><span class="no">1</span> macro <span class="sy">:anchor</span> <span class="r">do</span> 
<span class="no">2</span>   ident, title = <span class="iv">@params</span>
<span class="no">3</span>   macro_error <span class="s"><span class="dl">&quot;</span><span class="k">Bookmark '</span><span class="il"><span class="idl">#{</span>ident<span class="idl">}</span></span><span class="k">' already exists</span><span class="dl">&quot;</span></span> <span class="r">if</span> bookmark? ident
<span class="no">4</span>   bookmark <span class="sy">:id</span> =&gt; ident, <span class="sy">:title</span> =&gt; title
<span class="no">5</span>   <span class="s"><span class="dl">%{</span><span class="k">&lt;a id=&quot;</span><span class="il"><span class="idl">#{</span>ident<span class="idl">}</span></span><span class="k">&quot;&gt;</span><span class="il"><span class="idl">#{</span>title<span class="idl">}</span></span><span class="k">&lt;/a&gt;</span><span class="dl">}</span></span>
<span class="no">6</span> <span class="r">end</span></pre></div>
</div>
 

	<p>The <code>bookmark?</code> method can be used to check the existance of a particular ID within the whole document, while the <code>bookmark</code> method is used to store bookmark IDs and titles. In a similar way, you can use <code>header?</code> and <code>header</code> methods to check the existance of headers within the documents or store new ones.</p>
							<nav><a href="/glyph/book/extending/params_attrs.html">Parameters and Attributes &larr;</a><a href="/glyph/book/index.html">Contents</a><a href="/glyph/book/extending/placeholders.html">&rarr; Using Placeholders</a></nav>
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