78 lines
1.7 KiB
PHP
78 lines
1.7 KiB
PHP
|
<?php
|
||
|
|
/**
|
||
|
|
* @copyright Copyright 2014 Carsten Brandt, 2024 Daniel Pimley
|
||
|
|
* @license https://github.com/xenocrat/chyrp-markdown/blob/master/LICENSE
|
||
|
|
* @link https://github.com/xenocrat/chyrp-markdown#readme
|
||
|
|
*/
|
||
|
|
|
||
|
|
namespace xenocrat\markdown\block;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Adds fenced code blocks.
|
||
|
|
*
|
||
|
|
* Automatically includes indented code block support.
|
||
|
|
*/
|
||
|
|
trait FencedCodeTrait
|
||
|
|
{
|
||
|
|
use CodeTrait;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Identify a line as the beginning of a fenced code block.
|
||
|
|
*/
|
||
|
|
protected function identifyFencedCode($line): bool
|
||
|
|
{
|
||
|
|
return (
|
||
|
|
preg_match('/^ {0,3}~{3,}/', $line)
|
||
|
|
|| preg_match('/^ {0,3}`{3,}[^`]*$/', $line)
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Consume lines for a fenced code block.
|
||
|
|
*/
|
||
|
|
protected function consumeFencedCode($lines, $current): array
|
||
|
|
{
|
||
|
|
$indent = strspn($lines[$current], ' ');
|
||
|
|
$line = substr($lines[$current], $indent);
|
||
|
|
$mw = strspn($line, $line[0]);
|
||
|
|
$fence = substr($line, 0, $mw);
|
||
|
|
$language = trim(substr($line, $mw));
|
||
|
|
$content = [];
|
||
|
|
|
||
|
|
// Consume until end fence...
|
||
|
|
for ($i = $current + 1, $count = count($lines); $i < $count; $i++) {
|
||
|
|
$line = $lines[$i];
|
||
|
|
$leadingSpaces = strspn($line, ' ');
|
||
|
|
if (
|
||
|
|
$leadingSpaces > 3
|
||
|
|
|| strspn(ltrim($line), $fence[0]) < $mw
|
||
|
|
|| !str_ends_with(rtrim($line), $fence[0])
|
||
|
|
) {
|
||
|
|
if ($indent > 0 && $leadingSpaces > 0) {
|
||
|
|
if ($leadingSpaces < $indent) {
|
||
|
|
$line = ltrim($line);
|
||
|
|
} else {
|
||
|
|
$line = substr($line, $indent);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
$content[] = $line;
|
||
|
|
} else {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
$block = [
|
||
|
|
'code',
|
||
|
|
'content' => implode("\n", $content),
|
||
|
|
];
|
||
|
|
if ($language !== '') {
|
||
|
|
if (preg_match('/^[^ ]+/', $language, $match)) {
|
||
|
|
$block['language'] = $this->unEscapeBackslash($match[0]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return [$block, $i];
|
||
|
|
}
|
||
|
|
|
||
|
|
abstract protected function unEscapeBackslash($text);
|
||
|
|
}
|