294 lines
16 KiB
HTML
294 lines
16 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<meta http-equiv="X-UA-Compatible" content="ie=edge">
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<link rel="stylesheet" href="../../../static/styles.css?h=dff0aaad">
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<link rel="stylesheet" href="../../../static/pygments.css">
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<link rel="shortcut icon" href="../../../static/favicon.png?h=fa09bedd">
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<title>Navigation | Documentation | Lektor Static Content Management System</title>
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</head>
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<body class="default">
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<nav class="navbar navbar-inverse navbar-static-top">
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<a class="navbar-brand" href="../../../">Lektor</a>
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<div id="navbar" class="collapse navbar-collapse">
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<ul class="nav navbar-nav">
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<li><a href="../../../downloads/">Download</a></li>
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<li class="active"><a href="../../">Documentation</a></li>
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<li><a href="../../../showcase/">Showcase</a></li>
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<li><a href="../../../plugins/">Plugins</a></li>
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<li><a href="../../../community/">Community</a></li>
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<li><a href="../../../blog/">Blog</a></li>
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<div class="col-sm-3">
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<ul class="tree-nav nocontent">
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<li><a href="../../">Welcome</a></li>
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<li><a href="../../what/">What is Lektor</a>
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<li><a href="../../installation/">Installation</a>
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<li><a href="../../quickstart/">Quickstart</a>
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<li><a href="../../project/">Project</a>
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<li><a href="../../content/">Content</a>
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<li><a href="../">Templates</a>
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<ul>
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<li><a href="../urls/">URLs and Links</a>
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<li class="active"><a href="./">Navigation</a>
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<ul></ul>
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<li><a href="../imageops/">Image Operations</a>
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<li><a href="../videoops/">Video Operations</a>
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</ul>
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<li><a href="../../themes/">Themes</a>
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<li><a href="../../guides/">Guides</a>
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<li><a href="../../deployment/">Deployment</a>
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<li><a href="../../plugins/">Plugins</a>
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<li><a href="../../models/">Data Modelling</a>
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<li><a href="../../cli/">Command Line</a>
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<li><a href="../../api/">API</a>
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<li><a href="../../search/">Search</a>
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</ul>
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<div class="visible-md-block visible-lg-block">
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<h4>This Page</h4>
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<ul class="toc">
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<li><a href="#basic-semi-automatic-navigation">Basic Semi-Automatic Navigation</a></li>
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<li><a href="#fully-automatic-navigation">Fully Automatic Navigation</a></li>
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<li><a href="#recursive-tree-navigation">Recursive Tree Navigation</a></li>
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</ul>
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</div>
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</div>
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<div class="col-sm-9 doc-styling">
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<h1>Navigation</h1>
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<ul class=page-meta>
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</ul>
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<p>Websites are all about hyperlinks and being able to explore more. As such
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it's important to be able to provide a good navigation experience for your
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users. Templating in Lektor makes it very easy to make automatic navigation
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that keeps up to date with your pages. Most of this involves generating
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links with the help of the <a href="../urls/" class="ref">URL Filter</a>.</p>
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<h2 id="basic-semi-automatic-navigation">Basic Semi-Automatic Navigation</h2><p>The most basic form of navigation is a semi automatic one. It's one of the
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most flexible ones while still being easy to maintain. It requires knowledge
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of which pages to show and what the link title should be:</p>
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<div class="hll"><pre><span></span><span class="p"><</span><span class="nt">nav</span><span class="p">></span>
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<span class="p"><</span><span class="nt">ul</span> <span class="na">class</span><span class="o">=</span><span class="s">"nav navbar-nav"</span><span class="p">></span>
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<span class="p"><</span><span class="nt">li</span><span class="cp">{%</span> <span class="k">if</span> <span class="nv">this._path</span> <span class="o">==</span> <span class="s1">'/'</span> <span class="cp">%}</span> <span class="na">class</span><span class="o">=</span><span class="s">"active"</span><span class="cp">{%</span> <span class="k">endif</span>
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<span class="cp">%}</span><span class="p">><</span><span class="nt">a</span> <span class="na">href</span><span class="o">=</span><span class="s">"</span><span class="cp">{{</span> <span class="s1">'/'</span><span class="o">|</span><span class="nf">url</span> <span class="cp">}}</span><span class="s">"</span><span class="p">></span>Welcome<span class="p"></</span><span class="nt">a</span><span class="p">></</span><span class="nt">li</span><span class="p">></span>
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<span class="cp">{%</span> <span class="k">for</span> <span class="nv">href</span><span class="o">,</span> <span class="nv">title</span> <span class="k">in</span> <span class="o">[</span>
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<span class="o">[</span><span class="s1">'/blog'</span><span class="o">,</span> <span class="s1">'Blog'</span><span class="o">],</span>
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<span class="o">[</span><span class="s1">'/projects'</span><span class="o">,</span> <span class="s1">'Projects'</span><span class="o">],</span>
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<span class="o">[</span><span class="s1">'/about'</span><span class="o">,</span> <span class="s1">'About'</span><span class="o">]</span>
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<span class="o">]</span> <span class="cp">%}</span>
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<span class="p"><</span><span class="nt">li</span><span class="cp">{%</span> <span class="k">if</span> <span class="nv">this.is_child_of</span><span class="o">(</span><span class="nv">href</span><span class="o">)</span> <span class="cp">%}</span> <span class="na">class</span><span class="o">=</span><span class="s">"active"</span><span class="cp">{%</span> <span class="k">endif</span>
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<span class="cp">%}</span><span class="p">><</span><span class="nt">a</span> <span class="na">href</span><span class="o">=</span><span class="s">"</span><span class="cp">{{</span> <span class="nv">href</span><span class="o">|</span><span class="nf">url</span> <span class="cp">}}</span><span class="s">"</span><span class="p">></span><span class="cp">{{</span> <span class="nv">title</span> <span class="cp">}}</span><span class="p"></</span><span class="nt">a</span><span class="p">></</span><span class="nt">li</span><span class="p">></span>
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<span class="cp">{%</span> <span class="k">endfor</span> <span class="cp">%}</span>
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<span class="p"></</span><span class="nt">ul</span><span class="p">></span>
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<span class="p"></</span><span class="nt">nav</span><span class="p">></span>
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</pre></div>
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<p>In this case we use a list of pages (href and title) to automatically
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generate some list items and we ask the current page (<code>this</code>) if it is
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a child of the given path. Based on that information we automatically
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add a class to the link.</p>
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<p>The index page requires a bit of special casing as we do not want it to
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be active if any of its children are active. So we just check if the
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path of the current page is actually the path of the index page.</p>
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<h2 id="fully-automatic-navigation">Fully Automatic Navigation</h2><p>Sometimes all we want is to show navigation links for all sub-pages of
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a page. This is easy to accomplish as well:</p>
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<div class="hll"><pre><span></span><span class="p"><</span><span class="nt">nav</span><span class="p">></span>
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<span class="p"><</span><span class="nt">ul</span> <span class="na">class</span><span class="o">=</span><span class="s">"nav"</span><span class="p">></span>
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<span class="cp">{%</span> <span class="k">for</span> <span class="nv">project</span> <span class="k">in</span> <span class="nv">site.get</span><span class="o">(</span><span class="s1">'/projects'</span><span class="o">)</span><span class="nv">.children</span> <span class="cp">%}</span>
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<span class="p"><</span><span class="nt">li</span><span class="cp">{%</span> <span class="k">if</span> <span class="nv">this</span> <span class="o">==</span> <span class="nv">project</span> <span class="cp">%}</span> <span class="na">class</span><span class="o">=</span><span class="s">"active"</span><span class="cp">{%</span> <span class="k">endif</span>
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<span class="cp">%}</span><span class="p">><</span><span class="nt">a</span> <span class="na">href</span><span class="o">=</span><span class="s">"</span><span class="cp">{{</span> <span class="nv">project</span><span class="o">|</span><span class="nf">url</span> <span class="cp">}}</span><span class="s">"</span><span class="p">></span><span class="cp">{{</span> <span class="nv">project.name</span> <span class="cp">}}</span><span class="p"></</span><span class="nt">a</span><span class="p">></</span><span class="nt">li</span><span class="p">></span>
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<span class="cp">{%</span> <span class="k">endfor</span> <span class="cp">%}</span>
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<span class="p"></</span><span class="nt">ul</span><span class="p">></span>
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<span class="p"></</span><span class="nt">nav</span><span class="p">></span>
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</pre></div>
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<h2 id="recursive-tree-navigation">Recursive Tree Navigation</h2><p>In some situations you want to show a tree like navigation. This is for
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instance something that comes up when building site maps. In that situation
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the recursive Jinja loop system really comes in handy.</p>
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<div class="hll"><pre><span></span><span class="p"><</span><span class="nt">ul</span> <span class="na">class</span><span class="o">=</span><span class="s">"tree-nav"</span><span class="p">></span>
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<span class="cp">{%</span> <span class="k">set</span> <span class="nv">root</span> <span class="o">=</span> <span class="nv">site.get</span><span class="o">(</span><span class="s1">'/'</span><span class="o">)</span> <span class="cp">%}</span>
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<span class="cp">{%</span> <span class="k">for</span> <span class="nv">child</span> <span class="k">in</span> <span class="nv">root.children</span> <span class="k">recursive</span> <span class="cp">%}</span>
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<span class="p"><</span><span class="nt">li</span><span class="cp">{%</span> <span class="k">if</span> <span class="nv">this._path</span> <span class="o">==</span> <span class="nv">child._path</span> <span class="cp">%}</span> <span class="na">class</span><span class="o">=</span><span class="s">"active"</span><span class="cp">{%</span> <span class="k">endif</span>
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<span class="cp">%}</span><span class="p">><</span><span class="nt">a</span> <span class="na">href</span><span class="o">=</span><span class="s">"</span><span class="cp">{{</span> <span class="nv">child</span><span class="o">|</span><span class="nf">url</span> <span class="cp">}}</span><span class="s">"</span><span class="p">></span><span class="cp">{{</span> <span class="nv">child.title</span> <span class="cp">}}</span><span class="p"></</span><span class="nt">a</span><span class="p">></span>
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<span class="cp">{%</span> <span class="k">if</span> <span class="nv">this.is_child_of</span><span class="o">(</span><span class="nv">child</span><span class="o">)</span> <span class="cp">%}</span>
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<span class="p"><</span><span class="nt">ul</span><span class="p">></span><span class="cp">{{</span> <span class="nb">loop</span><span class="o">(</span><span class="nv">child.children</span><span class="o">)</span> <span class="cp">}}</span><span class="p"></</span><span class="nt">ul</span><span class="p">></span>
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<span class="cp">{%</span> <span class="k">endif</span> <span class="cp">%}</span>
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<span class="p"></</span><span class="nt">li</span><span class="p">></span>
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<span class="cp">{%</span> <span class="k">endfor</span> <span class="cp">%}</span>
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<span class="p"></</span><span class="nt">ul</span><span class="p">></span>
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</pre></div>
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<p>This above template recursively renders out a part of the tree based
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navigation around the current active page. For a concrete example for this:
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this is how the navigation of this documentation is rendered.</p>
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<div class="comment-box">
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<h2>Comments</h2>
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<div id="disqus_thread"></div>
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<script>
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var disqus_config = function() { this.page.identifier = "/docs/templates/navigation"; this.page.url = "https://www.getlektor.com/docs/templates/navigation/"; };
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var d = document, s = d.createElement('script');
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s.src = '//lektordocumentation.disqus.com/embed.js';
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s.setAttribute('data-timestamp', +new Date());
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(d.head || d.body).appendChild(s);
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<noscript>
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</div>
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<div class="bottomsummary">
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<div class="container">
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<footer>
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<div class="container">
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<a href="https://github.com/lektor/lektor/issues/" title="Report Issues for Lektor"
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<a href="https://github.com/lektor/lektor-website/tree/master/content/docs/templates/navigation/contents.lr" title="View source for this page"><i class="fa fa-code"></i></a>
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<a href="../../../license/">License & Copyright</a> •
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<a href="../../../contact/">Contact</a> •
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Made with <i class="fa fa-fw fa-heart" title="Heart"><span hidden>Heart</span></i> in Carinthia
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<script type=text/javascript src="../../../static/app.js?h=396519c0" charset="utf-8"></script>
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