"Fossies" - the Fresh Open Source Software Archive

Member "highlight-3.57-x64/extras/AsciiDoc/example_mod.html" (12 May 2020, 52112 Bytes) of package /windows/www/highlight-3.57-x64.zip:


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    1 <!DOCTYPE html>
    2 <html lang="en">
    3 <head>
    4 <meta charset="UTF-8">
    5 <meta http-equiv="X-UA-Compatible" content="IE=edge">
    6 <meta name="viewport" content="width=device-width, initial-scale=1.0">
    7 <meta name="generator" content="Asciidoctor 2.0.6">
    8 <meta name="author" content="Tristano Ajmone">
    9 <title>Modded HighlightTreeprocessor Example</title>
   10 <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Open+Sans:300,300italic,400,400italic,600,600italic%7CNoto+Serif:400,400italic,700,700italic%7CDroid+Sans+Mono:400,700">
   11 <style>
   12 /* Asciidoctor default stylesheet | MIT License | https://asciidoctor.org */
   13 /* Uncomment @import statement when using as custom stylesheet */
   14 /*@import "https://fonts.googleapis.com/css?family=Open+Sans:300,300italic,400,400italic,600,600italic%7CNoto+Serif:400,400italic,700,700italic%7CDroid+Sans+Mono:400,700";*/
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  438 <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
  439 <link rel="stylesheet" href="highlight_mod.css">
  440 </head>
  441 <body class="article toc2 toc-left">
  442 <div id="header">
  443 <h1>Modded HighlightTreeprocessor Example</h1>
  444 <div class="details">
  445 <span id="author" class="author">Tristano Ajmone</span><br>
  446 <span id="email" class="email"><a href="mailto:tajmone@gmail.com">tajmone@gmail.com</a></span><br>
  447 <span id="revnumber">mod v1.3.0,</span>
  448 <span id="revdate">2019-03-30</span>
  449 <br><span id="revremark">Last edited: 2019-03-12</span>
  450 </div>
  451 <div id="toc" class="toc2">
  452 <div id="toctitle">Table of Contents</div>
  453 <ul class="sectlevel1">
  454 <li><a href="#_highlighting_previews">Highlighting Previews</a>
  455 <ul class="sectlevel2">
  456 <li><a href="#_example_1">Example 1</a></li>
  457 <li><a href="#_example_2_line_numbers">Example 2: Line Numbers</a></li>
  458 <li><a href="#_example_3_substitutions">Example 3: Substitutions</a></li>
  459 </ul>
  460 </li>
  461 <li><a href="#_usage_instructions">Usage Instructions</a>
  462 <ul class="sectlevel2">
  463 <li><a href="#_custom_css_stylesheets">Custom CSS Stylesheets</a></li>
  464 <li><a href="#_custom_langdefs">Custom LangDefs</a></li>
  465 </ul>
  466 </li>
  467 </ul>
  468 </div>
  469 </div>
  470 <div id="content">
  471 <div id="preamble">
  472 <div class="sectionbody">
  473 <div class="paragraph">
  474 <p>A demonstration of the modded <strong>HighlightTreeprocessor</strong> extension with some usage instructions.</p>
  475 </div>
  476 <div class="paragraph">
  477 <p>Associated files:</p>
  478 </div>
  479 <div class="ulist">
  480 <ul>
  481 <li>
  482 <p><a href="./docinfo.html"><code>docinfo.html</code></a></p>
  483 </li>
  484 <li>
  485 <p><a href="./haml/block_listing.html.haml"><code>/haml/block_listing.html.haml</code></a></p>
  486 </li>
  487 <li>
  488 <p><a href="./highlight-treeprocessor.rb"><code>highlight-treeprocessor_mod.rb</code></a> v1.3.0</p>
  489 </li>
  490 <li>
  491 <p><a href="./highlight_mod.css"><code>highlight_mod.css</code></a></p>
  492 </li>
  493 </ul>
  494 </div>
  495 </div>
  496 </div>
  497 <div class="sect1">
  498 <h2 id="_highlighting_previews"><a class="anchor" href="#_highlighting_previews"></a>Highlighting Previews</h2>
  499 <div class="sectionbody">
  500 <div class="paragraph">
  501 <p>A couple of examples of how the rendered code looks like.
  502 <a href="./highlight_mod.css">The custom CSS stylesheet</a> defines a default theme plus some dedicated themes targeting specific syntaxes.</p>
  503 </div>
  504 <div class="sect2">
  505 <h3 id="_example_1"><a class="anchor" href="#_example_1"></a>Example 1</h3>
  506 <div class="paragraph">
  507 <p>For PureBasic code I&#8217;ve defined a dedicated theme mimicing the native IDE of the language.</p>
  508 </div>
  509 <div class="listingblock">
  510 <div class="content">
  511 <pre class="highlight" lang="purebasic"><code class="language-purebasic" data-lang="purebasic"><span class="hl slc">; ==============================================================================</span>&#x000A;<span class="hl slc">;                   PureBasic 5.62 - Syntax Highlighting Test</span>&#x000A;<span class="hl slc">; ==============================================================================</span>&#x000A;<span class="hl slc">; by Tristano Ajmone (2018/10/04), public domain: http://unlicense.org</span>&#x000A;&#x000A;<span class="hl kwa">Declare</span>.i <span class="hl kwc">CountdownDialog</span>(text.s)&#x000A;&#x000A;<span class="hl kwa">Macro</span> <span class="hl kwc">IsEven</span>(num)&#x000A;  (num <span class="hl opt">&amp;</span> <span class="hl num">1</span> <span class="hl opt">=</span> <span class="hl num">0</span>)&#x000A;<span class="hl kwa">EndMacro</span>&#x000A;&#x000A;<span class="hl kwa">For</span> i<span class="hl opt">=</span><span class="hl num">5</span> <span class="hl kwa">To</span> <span class="hl num">1</span> <span class="hl kwa">Step</span> <span class="hl opt">-</span><span class="hl num">1</span>&#x000A;  <span class="hl kwa">If</span> <span class="hl kwc">isEven</span>(i) : <span class="hl kwa">Debug</span> <span class="hl kwc">Str</span>(i) <span class="hl opt">+</span><span class="hl str">&quot; is even.&quot;</span> : <span class="hl kwa">EndIf</span>&#x000A;  TEXT$ <span class="hl opt">=</span> <span class="hl str">&quot;Iteration number: &quot;</span> <span class="hl opt">+</span> <span class="hl kwc">Str</span>(i) <span class="hl opt">+</span> <span class="hl str">~&quot;</span><span class="hl esc">\n\n</span><span class="hl str">Do you wish to continue?&quot;</span>&#x000A;  <span class="hl kwa">If</span> <span class="hl kwc">CountdownDialog</span>(TEXT$) : <span class="hl kwa">Break</span> : <span class="hl kwa">EndIf</span>&#x000A;<span class="hl kwa">Next</span>&#x000A;&#x000A;MyVar <span class="hl opt">=</span> <span class="hl num">%1011</span> <span class="hl opt">&lt;&lt;</span> <span class="hl num">1</span>&#x000A;<span class="hl kwa">EnableASM</span>&#x000A;<span class="hl kwb">INC</span> MyVar <span class="hl slc">; Mix ASM keywords with PureBasic variable</span>&#x000A;<span class="hl kwa">DisableASM</span>&#x000A;<span class="hl kwa">Debug</span> <span class="hl str">&quot;MyVar: &quot;</span><span class="hl opt">+</span><span class="hl kwc">Str</span>(MyVar)&#x000A;&#x000A;<span class="hl kwa">Procedure</span>.i <span class="hl kwc">CountdownDialog</span>(text.s)&#x000A;  UserChoice <span class="hl opt">=</span> <span class="hl kwc">MessageRequester</span>(<span class="hl str">&quot;Countdown Dialog&quot;</span>, text, <span class="hl kwb">#PB_MessageRequester_YesNo</span> <span class="hl opt">|</span>&#x000A;                                                          <span class="hl kwb">#PB_MessageRequester_Info</span>)&#x000A;  <span class="hl kwa">If</span> UserChoice <span class="hl opt">=</span> <span class="hl kwb">#PB_MessageRequester_No</span>&#x000A;    <span class="hl kwa">CompilerIf</span> <span class="hl kwb">#PB_Compiler_Processor</span> <span class="hl opt">=</span> <span class="hl kwb">#PB_Processor_x64</span>&#x000A;      <span class="hl kwb">!mov rax,1</span>&#x000A;    <span class="hl kwa">CompilerElse</span>&#x000A;      <span class="hl kwb">!mov eax,1</span>&#x000A;    <span class="hl kwa">CompilerEndIf</span>&#x000A;  <span class="hl kwa">Else</span>&#x000A;    <span class="hl kwa">ProcedureReturn</span> <span class="hl num">0</span>&#x000A;  <span class="hl kwa">EndIf</span>&#x000A;  <span class="hl kwa">ProcedureReturn</span> <span class="hl slc">; RAX/EAX will be the implicit return value</span>&#x000A;<span class="hl kwa">EndProcedure</span></code></pre>
  512 </div>
  513 </div>
  514 </div>
  515 <div class="sect2">
  516 <h3 id="_example_2_line_numbers"><a class="anchor" href="#_example_2_line_numbers"></a>Example 2: Line Numbers</h3>
  517 <div class="paragraph">
  518 <p>In this example we add the <code>linenum</code> option to enable line-numbering.
  519 Again, for the Alan syntax there is a dedicated CSS theme.</p>
  520 </div>
  521 <div class="listingblock">
  522 <div class="content">
  523 <pre class="highlight" lang="alan"><code class="language-alan" data-lang="alan"><span class="hl lin"> 1 </span><span class="hl slc">--==============================================================================</span>&#x000A;<span class="hl lin"> 2 </span><span class="hl slc">-- &quot;Chez Alan&quot; by Tristano Ajmone, 2018 || Public domain: http://unlicense.org</span>&#x000A;<span class="hl lin"> 3 </span><span class="hl slc">--==============================================================================</span>&#x000A;<span class="hl lin"> 4 </span><span class="hl kwa">Import</span> &apos;library.i&apos;<span class="hl kwa">.</span> <span class="hl slc">--&gt; ALAN Standard Library v2.1</span>&#x000A;<span class="hl lin"> 5 </span>&#x000A;<span class="hl lin"> 6 </span><span class="hl kwa">The</span> my_game <span class="hl kwa">IsA</span> definition_block&#x000A;<span class="hl lin"> 7 </span>  <span class="hl kwa">Has</span> title    <span class="hl str">&quot;Chez Alan&quot;</span><span class="hl kwa">.</span>&#x000A;<span class="hl lin"> 8 </span>  <span class="hl kwa">Has</span> subtitle <span class="hl str">&quot;A small demo adventure&quot;</span><span class="hl kwa">.</span>&#x000A;<span class="hl lin"> 9 </span>  <span class="hl kwa">Has</span> author   <span class="hl str">&quot;Tristano Ajmone&quot;</span><span class="hl kwa">.</span>&#x000A;<span class="hl lin">10 </span>  <span class="hl kwa">Has</span> year     <span class="hl num">2018</span><span class="hl kwa">.</span>&#x000A;<span class="hl lin">11 </span>  <span class="hl kwa">Has</span> version  <span class="hl str">&quot;1&quot;</span><span class="hl kwa">.</span>&#x000A;<span class="hl lin">12 </span><span class="hl kwa">End The.</span>&#x000A;<span class="hl lin">13 </span>&#x000A;<span class="hl lin">14 </span><span class="hl kwa">The</span> &apos;IF Plaza&apos; <span class="hl kwa">IsA</span> <span class="hl kwb">location</span>&#x000A;<span class="hl lin">15 </span>  <span class="hl kwa">Exit</span> north <span class="hl kwa">to</span> ChezAlan<span class="hl kwa">.</span>&#x000A;<span class="hl lin">16 </span>  <span class="hl kwa">Description</span> <span class="hl str">&quot;North lies &quot;</span><span class="hl str">&quot;Chez Alan&quot;</span><span class="hl str">&quot;, the renown French brasserie.&quot;</span>&#x000A;<span class="hl lin">17 </span><span class="hl kwa">End The</span> &apos;IF Plaza&apos;<span class="hl kwa">.</span>&#x000A;<span class="hl lin">18 </span>&#x000A;<span class="hl lin">19 </span><span class="hl kwa">The</span> ChezAlan <span class="hl kwa">IsA</span> room<span class="hl kwa">.</span>&#x000A;<span class="hl lin">20 </span>  <span class="hl kwa">Name</span> &apos;Chez Alan Brasserie&apos;<span class="hl kwa">.</span>&#x000A;<span class="hl lin">21 </span>  <span class="hl kwa">Description</span>&#x000A;<span class="hl lin">22 </span>    <span class="hl str">&quot;Today Chez Alan seems busier then ever.&quot;</span>&#x000A;<span class="hl lin">23 </span>  <span class="hl kwa">Entered</span>&#x000A;<span class="hl lin">24 </span>    <span class="hl str">&quot;&quot;</span><span class="hl str">&quot;Welcome back Sir!&quot;</span><span class="hl str">&quot; the maitre greets you.</span>&#x000A;<span class="hl lin">25 </span><span class="hl str"></span>    <span class="hl esc">$n</span><span class="hl str">He has a strong French accent.&quot;</span>&#x000A;<span class="hl lin">26 </span><span class="hl kwa">End The</span> ChezAlan<span class="hl kwa">.</span>&#x000A;<span class="hl lin">27 </span>&#x000A;<span class="hl lin">28 </span><span class="hl kwa">The</span> Pierre <span class="hl kwa">IsA</span> male <span class="hl kwa">At</span> ChezAlan<span class="hl kwa">.</span>&#x000A;<span class="hl lin">29 </span>  <span class="hl kwa">Name</span> Pierre<span class="hl kwa">.</span>&#x000A;<span class="hl lin">30 </span>  <span class="hl kwa">Name</span> &apos;Alan&apos;&apos;s&apos; brother<span class="hl kwa">.</span>&#x000A;<span class="hl lin">31 </span>  <span class="hl kwa">Is</span> named<span class="hl kwa">.</span>&#x000A;<span class="hl lin">32 </span>  <span class="hl kwa">Has</span> ex <span class="hl str">&quot;Pierre is Alan&apos;s brother.&quot;</span><span class="hl kwa">.</span>&#x000A;<span class="hl lin">33 </span><span class="hl kwa">End The</span> Pierre<span class="hl kwa">.</span>&#x000A;<span class="hl lin">34 </span>&#x000A;<span class="hl lin">35 </span><span class="hl kwa">Start At</span> &apos;IF Plaza&apos;<span class="hl kwa">.</span>&#x000A;<span class="hl lin">36 </span><span class="hl kwa">Describe</span> banner<span class="hl kwa">.</span></code></pre>
  524 </div>
  525 </div>
  526 <div class="paragraph">
  527 <p>When <code>linenums</code> is used, Highlight is invoked with the <code>-l -j 2</code> options.</p>
  528 </div>
  529 </div>
  530 <div class="sect2">
  531 <h3 id="_example_3_substitutions"><a class="anchor" href="#_example_3_substitutions"></a>Example 3: Substitutions</h3>
  532 <div class="paragraph">
  533 <p>In this example we&#8217;ll enable substitutions inside the listing code via the <code>subs=quotes</code> option.</p>
  534 </div>
  535 <div class="literalblock">
  536 <div class="title">Asciidoc source</div>
  537 <div class="content">
  538 <pre>[source,alan,subs=quotes]
  539 ------------------------
  540 The 'dance hall' #IsA location#
  541   Description
  542     "The hall is #_bigger_ than you expected#, and
  543      far too crowded. You feel the urge to leave."
  544 End the.
  545 ------------------------</pre>
  546 </div>
  547 </div>
  548 <div class="listingblock">
  549 <div class="title">HTML result</div>
  550 <div class="content">
  551 <pre class="highlight" lang="alan"><code class="language-alan" data-lang="alan"><span class="hl kwa">The</span> &apos;dance hall&apos; <mark><span class="hl kwa">IsA</span> <span class="hl kwb">location</span></mark>&#x000A;  <span class="hl kwa">Description</span>&#x000A;    <span class="hl str">&quot;The hall is <mark><em>bigger</em> than you expected</mark>, and</span>&#x000A;<span class="hl str">     far too crowded. You feel the urge to leave.&quot;</span>&#x000A;<span class="hl kwa">End the.</span></code></pre>
  552 </div>
  553 </div>
  554 <div class="paragraph">
  555 <p>Text enclosed within single or double <code>&num;</code> symbols will be wrapped in the <code>&lt;mark&gt;</code> tag (See
  556 <a href="https://asciidoctor.org/docs/user-manual/#custom-styling-with-attributes" target="_blank" rel="noopener">Asciidoctor Manual ยง19.5</a>), which I&#8217;ve customized to mimic a smeared fluorescent marker.
  557 Also notice how the word &#8216;bigger&#8217; is rendered as emphasized text.</p>
  558 </div>
  559 </div>
  560 </div>
  561 </div>
  562 <div class="sect1">
  563 <h2 id="_usage_instructions"><a class="anchor" href="#_usage_instructions"></a>Usage Instructions</h2>
  564 <div class="sectionbody">
  565 <div class="paragraph">
  566 <p>To enable the modded <strong>HighlightTreeprocessor</strong> extension you must invoke Asciidoctor with the <code>-r</code> (<code>--require</code>) option:</p>
  567 </div>
  568 <div class="listingblock">
  569 <div class="content">
  570 <pre class="highlight" lang="bash"><code class="language-bash" data-lang="bash">asciidoctor \&#x000A;  <span class="hl slc"><mark>-r ./highlight-treeprocessor_mod.rb</mark> \</span>&#x000A;  <span class="hl kwb">-a</span> source-highlighter<span class="hl opt">=</span>highlight \&#x000A;  <span class="hl kwb">-a</span> docinfo<span class="hl opt">=</span>shared \&#x000A;  <span class="hl kwb">-T</span> haml \&#x000A;  example_mod.asciidoc</code></pre>
  571 </div>
  572 </div>
  573 <div class="paragraph">
  574 <p>To enable using Highlight, you need to set the <code>source-highlighter</code> attribute to <code>highlight</code>.
  575 You may do so via the command line, using the <code>-a</code> (<code>--attribute</code>) option:</p>
  576 </div>
  577 <div class="listingblock">
  578 <div class="content">
  579 <pre class="highlight" lang="bash"><code class="language-bash" data-lang="bash">asciidoctor \&#x000A;  <span class="hl kwb">-r</span> .<span class="hl opt">/</span>highlight-treeprocessor_mod.rb \&#x000A;  <span class="hl slc"><mark>-a source-highlighter=highlight</mark> \</span>&#x000A;  <span class="hl kwb">-a</span> docinfo<span class="hl opt">=</span>shared \&#x000A;  <span class="hl kwb">-T</span> haml \&#x000A;  example_mod.asciidoc</code></pre>
  580 </div>
  581 </div>
  582 <div class="paragraph">
  583 <p>or you can set the <code>source-highlighter</code> attribute inside the document header:</p>
  584 </div>
  585 <div class="literalblock">
  586 <div class="content">
  587 <pre>:source-highlighter: highlight</pre>
  588 </div>
  589 </div>
  590 <div class="sect2">
  591 <h3 id="_custom_css_stylesheets"><a class="anchor" href="#_custom_css_stylesheets"></a>Custom CSS Stylesheets</h3>
  592 <div class="paragraph">
  593 <p>Because the modded extension doesn&#8217;t rely on Highlight to convert themes to CSS, you&#8217;ll need to add to the output document your custom CSS.</p>
  594 </div>
  595 <div class="paragraph">
  596 <p>The easiest way to do so without interfering with the native stylesheet of the Asciidoctor HTML backend is to incorporate the CSS file via a
  597 <a href="https://asciidoctor.org/docs/user-manual/#docinfo-file" title="See Asciidoctor documentation on docinfo files" target="_blank" rel="noopener">head docinfo file</a>, and then enable it via the <code>docinfo</code> attribute, either in the document header:</p>
  598 </div>
  599 <div class="literalblock">
  600 <div class="content">
  601 <pre>:docinfo: shared</pre>
  602 </div>
  603 </div>
  604 <div class="paragraph">
  605 <p>or via CLI options:</p>
  606 </div>
  607 <div class="listingblock">
  608 <div class="content">
  609 <pre class="highlight" lang="bash"><code class="language-bash" data-lang="bash">asciidoctor \&#x000A;  <span class="hl kwb">-r</span> .<span class="hl opt">/</span>highlight-treeprocessor_mod.rb \&#x000A;  <span class="hl kwb">-a</span> source-highlighter<span class="hl opt">=</span>highlight \&#x000A;  <span class="hl slc"><mark>-a docinfo=shared</mark> \</span>&#x000A;  <span class="hl kwb">-T</span> haml \&#x000A;  example_mod.asciidoc</code></pre>
  610 </div>
  611 </div>
  612 <div class="paragraph">
  613 <p>The <a href="./docinfo.html"><code>docinfo.html</code></a> file used for this document contains a single header line to load the external CSS stylesheet:</p>
  614 </div>
  615 <div class="listingblock">
  616 <div class="content">
  617 <pre class="highlight" lang="html"><code class="language-html" data-lang="html"><span class="hl kwa">&lt;link</span> <span class="hl kwb">rel</span>=<span class="hl str">&quot;stylesheet&quot;</span> <span class="hl kwb">href</span>=<span class="hl str">&quot;highlight_mod.css&quot;</span><span class="hl kwa">&gt;</span></code></pre>
  618 </div>
  619 </div>
  620 <div class="paragraph">
  621 <p>Further more, if you want to be able to customize themes on a per language base, and use different background colors for each theme, you&#8217;ll need to use the customized Haml template provided with this example:</p>
  622 </div>
  623 <div class="ulist">
  624 <ul>
  625 <li>
  626 <p><a href="./haml/block_listing.html.haml"><code>/haml/block_listing.html.haml</code></a></p>
  627 </li>
  628 </ul>
  629 </div>
  630 <div class="paragraph">
  631 <p>and tell Asciidoctor where to look for the custom templates folder via the <code>-T</code> (<code>--template-dir</code>) option:</p>
  632 </div>
  633 <div class="listingblock">
  634 <div class="content">
  635 <pre class="highlight" lang="bash"><code class="language-bash" data-lang="bash">asciidoctor \&#x000A;  <span class="hl kwb">-r</span> .<span class="hl opt">/</span>highlight-treeprocessor_mod.rb \&#x000A;  <span class="hl kwb">-a</span> source-highlighter<span class="hl opt">=</span>highlight \&#x000A;  <span class="hl kwb">-a</span> docinfo<span class="hl opt">=</span>shared \&#x000A;  <span class="hl slc"><mark>-T haml</mark> \</span>&#x000A;  example_mod.asciidoc</code></pre>
  636 </div>
  637 </div>
  638 <div class="paragraph">
  639 <p>The customized template ensures that the <code>lang</code> attribute is added also to the <code>&lt;pre&gt;</code> tag, so it might be targeted via custom CSS:</p>
  640 </div>
  641 <div class="listingblock">
  642 <div class="content">
  643 <pre class="highlight" lang="html"><code class="language-html" data-lang="html"><span class="hl kwa">&lt;pre</span> <span class="hl kwb">class</span>=<span class="hl str">&quot;highlight&quot;</span> <span class="hl kwb">lang</span>=<span class="hl str">&quot;alan&quot;</span><span class="hl kwa">&gt;</span>&#x000A;  <span class="hl kwa">&lt;code</span> <span class="hl kwb">class</span>=<span class="hl str">&quot;language-alan&quot;</span> <span class="hl kwb">data-lang</span>=<span class="hl str">&quot;alan&quot;</span><span class="hl kwa">&gt;</span></code></pre>
  644 </div>
  645 </div>
  646 <div class="paragraph">
  647 <p>whereas by default Asciidoctor will only emit the <code>lang</code> attribute on the <code>&lt;code&gt;</code> tag:</p>
  648 </div>
  649 <div class="listingblock">
  650 <div class="content">
  651 <pre class="highlight" lang="html"><code class="language-html" data-lang="html"><span class="hl kwa">&lt;pre</span> <span class="hl kwb">class</span>=<span class="hl str">&quot;highlight&quot;</span><span class="hl kwa">&gt;</span>&#x000A;  <span class="hl kwa">&lt;code</span> <span class="hl kwb">class</span>=<span class="hl str">&quot;language-alan&quot;</span> <span class="hl kwb">data-lang</span>=<span class="hl str">&quot;alan&quot;</span><span class="hl kwa">&gt;</span></code></pre>
  652 </div>
  653 </div>
  654 <div class="paragraph">
  655 <p>In the <a href="./sass"><code>/sass/</code></a> folder you&#8217;ll find the commented SCSS sources used by this document, and a useful Sass template for quickly generating Highlight themes targeting specific syntaxes.</p>
  656 </div>
  657 </div>
  658 <div class="sect2">
  659 <h3 id="_custom_langdefs"><a class="anchor" href="#_custom_langdefs"></a>Custom LangDefs</h3>
  660 <div class="paragraph">
  661 <p>If you&#8217;d like to make available to Highlight some custom langDefs, or override the native language definitions of Highlight with your same-named customized versions, you only need to set the <code>HIGHLIGHT_DATADIR</code> environment variable to point to your custom Hihglight settings folder before invoking Asciidoctor.</p>
  662 </div>
  663 <div class="paragraph">
  664 <p>The modded extension will check if the <code>HIGHLIGHT_DATADIR</code> environment variable is set, and if it is it will enforce it by invoking Highlight with the <code>--data-dir=&lt;HIGHLIGHT_DATADIR&gt;</code> option so that it gets the highest override priority.</p>
  665 </div>
  666 <div class="paragraph">
  667 <p>This ensures that custom langDefs inside <code>HIGHLIGHT_DATADIR</code> will always override the predefined ones, whereas ordinarily the path of the <code>HIGHLIGHT_DATADIR</code> env var would be searched <em>after</em> Highlight installation folder.</p>
  668 </div>
  669 <div class="paragraph">
  670 <p>Since it&#8217;s not possible to control the <code>--data-dir</code> option from within AsciiDoc documents, this hardcoded workaround is a convenient solution for projects which need to override Highlight default configurations.</p>
  671 </div>
  672 </div>
  673 </div>
  674 </div>
  675 </div>
  676 <div id="footer">
  677 <div id="footer-text">
  678 mod v1.3.0<br>
  679 </div>
  680 </div>
  681 </body>
  682 </html>