aleph1.co.uk Git - yaffs-website/blob - vendor/cebe/markdown/block/FencedCodeTrait.php

   1 <?php
   2 /**
   3  * @copyright Copyright (c) 2014 Carsten Brandt
   4  * @license https://github.com/cebe/markdown/blob/master/LICENSE
   5  * @link https://github.com/cebe/markdown#readme
   6  */
   7
   8 namespace cebe\markdown\block;
   9
  10 /**
  11  * Adds the fenced code blocks
  12  *
  13  * automatically included 4 space indented code blocks
  14  */
  15 trait FencedCodeTrait
  16 {
  17         use CodeTrait;
  18
  19         /**
  20          * identify a line as the beginning of a fenced code block.
  21          */
  22         protected function identifyFencedCode($line)
  23         {
  24                 return ($l = $line[0]) === '`' && strncmp($line, '```', 3) === 0 ||
  25                                 $l === '~' && strncmp($line, '~~~', 3) === 0;
  26         }
  27
  28         /**
  29          * Consume lines for a fenced code block
  30          */
  31         protected function consumeFencedCode($lines, $current)
  32         {
  33                 // consume until ```
  34                 $line = rtrim($lines[$current]);
  35                 $fence = substr($line, 0, $pos = strrpos($line, $line[0]) + 1);
  36                 $language = substr($line, $pos);
  37                 $content = [];
  38                 for ($i = $current + 1, $count = count($lines); $i < $count; $i++) {
  39                         if (rtrim($line = $lines[$i]) !== $fence) {
  40                                 $content[] = $line;
  41                         } else {
  42                                 break;
  43                         }
  44                 }
  45                 $block = [
  46                         'code',
  47                         'content' => implode("\n", $content),
  48                 ];
  49                 if (!empty($language)) {
  50                         $block['language'] = $language;
  51                 }
  52                 return [$block, $i];
  53         }
  54 }