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2022-01-06 15:17:14 +01:00
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<title>Hugo highlighting example</title>
<meta name="author" content="Josh Dzielak">
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<div class="slides">
<section><h2 id="hugo-highlighter-presentation">Hugo Highlighter Presentation</h2>
<p>This is an example of a presentation using Hugo&rsquo;s compile-time syntax highlighter.</p>
</section><section>
<p>Reveal.js uses Javascript for syntax highlighting (via Highlight.js). This might slow the presentation down if many slides contain code.</p>
</section><section>
<p>Hugo has a built-in <a href="https://gohugo.io/content-management/syntax-highlighting/">compile-time highlighter</a>, and it&rsquo;s lightning fast too!</p>
</section><section>
<p>You can enable it using the <code>highlight</code> shortcode.</p>
<div class="highlight"><pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="nohighlight" data-noescape><span style="color:#000;font-weight:bold">{{&lt;</span> <span style="color:#000">highlight</span> <span style="color:#204a87;font-weight:bold">go</span> <span style="color:#000;font-weight:bold">&gt;}}</span>
<span style="color:#204a87;font-weight:bold">package</span> <span style="color:#000">main</span>
<span style="color:#204a87;font-weight:bold">import</span> <span style="color:#4e9a06">&#34;fmt&#34;</span>
<span style="color:#204a87;font-weight:bold">func</span> <span style="color:#000">main</span><span style="color:#000;font-weight:bold">()</span> <span style="color:#000;font-weight:bold">{</span>
<span style="color:#000">fmt</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Println</span><span style="color:#000;font-weight:bold">(</span><span style="color:#4e9a06">&#34;Hello world!&#34;</span><span style="color:#000;font-weight:bold">)</span>
<span style="color:#000;font-weight:bold">}</span>
<span style="color:#000;font-weight:bold">{{&lt;</span> <span style="color:#ce5c00;font-weight:bold">/</span><span style="color:#000">highlight</span> <span style="color:#000;font-weight:bold">&gt;}}</span></code></pre></div>
</section><section>
<p>Several options are supported, check <a href="https://gohugo.io/content-management/syntax-highlighting/">Hugo&rsquo;s documentation</a>.</p>
<div class="highlight"><pre tabindex="0" style="background-color:#fff;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="nohighlight" data-noescape><span style="margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f"> 1</span>{{&lt; highlight <span style="color:#000;font-weight:bold">go</span> <span style="color:#d14">&#34;style=github,linenos=inline,hl_lines=6&#34;</span> &gt;}}
<span style="margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f"> 2</span>
<span style="margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f"> 3</span><span style="color:#000;font-weight:bold">package</span> main
<span style="margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f"> 4</span>
<span style="margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f"> 5</span><span style="color:#000;font-weight:bold">import</span> <span style="color:#d14">&#34;fmt&#34;</span>
<span style="margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f"> 6</span>
<span style="margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f"> 7</span><span style="color:#000;font-weight:bold">func</span> <span style="color:#900;font-weight:bold">main</span>() {
<span style="display:block;width:100%;background-color:#e5e5e5"><span style="margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f"> 8</span> fmt.<span style="color:#900;font-weight:bold">Println</span>(<span style="color:#d14">&#34;Hello world!&#34;</span>)
</span><span style="margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f"> 9</span>}
<span style="margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">10</span>
<span style="margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">11</span>{{&lt; <span style="color:#000;font-weight:bold">/</span>highlight &gt;}}</code></pre></div>
</section><section>
<p>You can also use Hugo&rsquo;s highlighter in markdown code fences,
by putting this in <code>config.toml</code>:</p>
<div class="highlight"><pre tabindex="0" style="background-color:#fff;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="nohighlight" data-noescape><span style="color:#998;font-style:italic"># use Hugo&#39;s hl in markdown (with or without a language tag)</span>
[markup.highlight]
codeFences = <span style="color:#000;font-weight:bold">true</span>
style = <span style="color:#d14">&#34;github&#34;</span></code></pre></div>
<p>(This can only be enabled globally for all presentations.)</p>
</section><section>
<ul>
<li>Highlight.js is automatically disabled in code blocks highlighted by Hugo.</li>
<li>The two highlighters can be even mixed.</li>
</ul>
<div class="highlight"><pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="nohighlight" data-noescape><span style="color:#204a87;font-weight:bold">package</span> <span style="color:#000">main</span>
<span style="color:#204a87;font-weight:bold">import</span> <span style="color:#4e9a06">&#34;fmt&#34;</span>
<span style="color:#204a87;font-weight:bold">func</span> <span style="color:#000">main</span><span style="color:#000;font-weight:bold">()</span> <span style="color:#000;font-weight:bold">{</span>
<span style="color:#000">fmt</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Println</span><span style="color:#000;font-weight:bold">(</span><span style="color:#4e9a06">&#34;Hello world!&#34;</span><span style="color:#000;font-weight:bold">)</span>
<span style="color:#000;font-weight:bold">}</span></code></pre></div>
<pre><code class="language-go">package main
import &quot;fmt&quot;
func main() {
fmt.Println(&quot;Hello world!&quot;)
}
</code></pre>
</section><section>
<p>If you don&rsquo;t need highlight.js at all, you can prevent it from loading.</p>
<div class="highlight"><pre tabindex="0" style="background-color:#fff;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="nohighlight" data-noescape><span style="color:#998;font-style:italic"># This works both in config.toml and a presentation&#39;s front</span>
<span style="color:#998;font-style:italic"># matter. Default plugins include highlight.js, so disable them</span>
<span style="color:#998;font-style:italic"># and load those that we want manually.</span>
[params.reveal_hugo]
load_default_plugins = <span style="color:#000;font-weight:bold">false</span>
plugins = [
<span style="color:#d14">&#34;reveal-js/plugin/zoom-js/zoom.js&#34;</span>,
<span style="color:#d14">&#34;reveal-js/plugin/notes/notes.js&#34;</span>,
]</code></pre></div>
</section>
</div>
</div>
<script type="text/javascript" src=./reveal-hugo/object-assign.js></script>
<a href="./reveal-js/css/print/" id="print-location" style="display: none;"></a>
<script type="text/javascript">
var printLocationElement = document.getElementById('print-location');
var link = document.createElement('link');
link.rel = 'stylesheet';
link.type = 'text/css';
link.href = printLocationElement.href + (window.location.search.match(/print-pdf/gi) ? 'pdf.css' : 'paper.css');
document.getElementsByTagName('head')[0].appendChild(link);
</script>
<script type="application/json" id="reveal-hugo-site-params">{"history":true,"templates":{"grey":{"background":"#424242","transition":"convex"}}}</script>
<script type="application/json" id="reveal-hugo-page-params">{"theme":"simple"}</script>
<script src="./reveal-js/js/reveal.js"></script>
<script type="text/javascript">
function camelize(map) {
if (map) {
Object.keys(map).forEach(function(k) {
newK = k.replace(/(\_\w)/g, function(m) { return m[1].toUpperCase() });
if (newK != k) {
map[newK] = map[k];
delete map[k];
}
});
}
return map;
}
var revealHugoDefaults = { center: true, controls: true, history: true, progress: true, transition: "slide" };
var revealHugoSiteParams = JSON.parse(document.getElementById('reveal-hugo-site-params').innerHTML);
var revealHugoPageParams = JSON.parse(document.getElementById('reveal-hugo-page-params').innerHTML);
var options = Object.assign({},
camelize(revealHugoDefaults),
camelize(revealHugoSiteParams),
camelize(revealHugoPageParams));
Reveal.initialize(options);
</script>
<script type="text/javascript" src="./reveal-js/plugin/markdown/marked.js"></script>
<script type="text/javascript" src="./reveal-js/plugin/markdown/markdown.js"></script>
<script type="text/javascript" src="./reveal-js/plugin/highlight/highlight.js"></script>
<script type="text/javascript" src="./reveal-js/plugin/zoom-js/zoom.js"></script>
<script type="text/javascript" src="./reveal-js/plugin/notes/notes.js"></script>
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