leilukin-tumbleblog/includes/lib/xenocrat/markdown/block/QuoteTrait.php

85 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 blockquote blocks.
*/
trait QuoteTrait
{
/**
* Identify a line as the beginning of a blockquote.
*/
protected function identifyQuote($line): bool
{
if (
$line[0] === ' '
&& strspn($line, ' ') < 4
) {
// trim up to three spaces
$line = ltrim($line, ' ');
}
return $line[0] === '>';
}
/**
* Consume lines for a blockquote element.
*/
protected function consumeQuote($lines, $current): array
{
$content = [];
// consume until end of markers...
for ($i = $current, $count = count($lines); $i < $count; $i++) {
$line = $lines[$i];
if (
isset($line[0])
&& $line[0] === ' '
&& strspn($line, ' ') < 4
) {
// Trim up to three spaces.
$line = ltrim($line, ' ');
}
if (ltrim($line) !== '') {
if ($line[0] == '>' && !isset($line[1])) {
$line = '';
} elseif (str_starts_with($line, '> ')) {
$line = substr($line, 2);
} elseif (str_starts_with($line, '>')) {
$line = substr($line, 1);
} else {
--$i;
break;
}
$content[] = $line;
} else {
break;
}
}
$block = [
'quote',
'content' => $this->parseBlocks($content),
];
return [$block, $i];
}
/**
* Renders a blockquote.
*/
protected function renderQuote($block): string
{
return "<blockquote>\n"
. $this->renderAbsy($block['content'])
. "</blockquote>\n";
}
abstract protected function parseBlocks($lines);
abstract protected function renderAbsy($absy);
}