highlightjs/highlightjs.php

   1 <?php
   2 /**
   3  * Name: Syntax Highlighting
   4  * Description: Highlights syntax of code blocks with highlight.js
   5  * Version: 1.0
   6  * Author: Hypolite Petovan <hypolite@mrpetovan.com>
   7  */
   8
   9 use Friendica\App;
  10 use Friendica\Core\Addon;
  11
  12 function highlightjs_install()
  13 {
  14         Addon::registerHook('page_end', __FILE__, 'highlightjs_page_end');
  15 }
  16
  17 function highlightjs_uninstall()
  18 {
  19         Addon::unregisterHook('page_end', __FILE__, 'highlightjs_page_end');
  20 }
  21
  22 function highlightjs_page_end(App $a, &$b)
  23 {
  24         $basedir = $a->get_baseurl() . '/addon/highlightjs/asset';
  25
  26         if ($a->getCurrentTheme() == 'frio') {
  27                 $style = 'bootstrap';
  28         } else {
  29                 $style = 'default';
  30         }
  31
  32         $a->page['htmlhead'] .= <<< HTML
  33
  34 <link rel="stylesheet" href="{$basedir}/styles/{$style}.css">
  35
  36 HTML;
  37
  38         $b .= <<< HTML
  39
  40 <script type="text/javascript" src="{$basedir}/highlight.pack.js"></script>
  41 <script type="text/javascript">
  42         hljs.initHighlightingOnLoad();
  43
  44         document.addEventListener('postprocess_liveupdate', function () {
  45                 var blocks = document.querySelectorAll('pre code:not(.hljs)');
  46                 Array.prototype.forEach.call(blocks, hljs.highlightBlock);
  47         });
  48 </script>
  49
  50 HTML;
  51 }