86 lines
1.6 KiB
PHP
86 lines
1.6 KiB
PHP
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<?php
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/**
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* @copyright Copyright 2023 Daniel Pimley
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* @license https://github.com/xenocrat/chyrp-markdown/blob/master/LICENSE
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* @link https://github.com/xenocrat/chyrp-markdown#readme
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*/
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namespace xenocrat\markdown\block;
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/**
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* Adds aside blocks.
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*/
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trait AsideTrait
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{
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/**
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* Identify a line as the beginning of an aside.
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*/
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protected function identifyAside($line): bool
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{
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if (
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$line[0] === ' '
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&& strspn($line, ' ') < 4
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) {
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// Trim up to three spaces.
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$line = ltrim($line, ' ');
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}
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return (
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$line[0] === '<'
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&& (!isset($line[1]) || ($l1 = $line[1]) === ' ')
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);
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}
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/**
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* Consume lines for an aside.
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*/
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protected function consumeAside($lines, $current): array
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{
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$content = [];
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// Consume until end of markers...
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for ($i = $current, $count = count($lines); $i < $count; $i++) {
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$line = $lines[$i];
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if (
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isset($line[0])
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&& $line[0] === ' '
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&& strspn($line, ' ') < 4
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) {
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// Trim up to three spaces.
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$line = ltrim($line, ' ');
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}
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if (ltrim($line) !== '') {
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if ($line[0] == '<' && !isset($line[1])) {
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$line = '';
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} elseif (str_starts_with($line, '< ')) {
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$line = substr($line, 2);
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} else {
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--$i;
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break;
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}
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$content[] = $line;
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} else {
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break;
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}
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}
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$block = [
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'aside',
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'content' => $this->parseBlocks($content),
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];
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return [$block, $i];
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}
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/**
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* Renders an aside.
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*/
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protected function renderAside($block): string
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{
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return "<aside>\n"
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. $this->renderAbsy($block['content'])
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. "</aside>\n";
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}
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abstract protected function parseBlocks($lines);
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abstract protected function renderAbsy($absy);
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}
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