67 lines
1.8 KiB
PHP
67 lines
1.8 KiB
PHP
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<?php
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/**
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* @copyright Copyright (c) 2014 Carsten Brandt
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* @license https://github.com/cebe/markdown/blob/master/LICENSE
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* @link https://github.com/cebe/markdown#readme
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*/
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namespace cebe\markdown\block;
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/**
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* Adds the 4 space indented code blocks
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*/
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trait CodeTrait
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{
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/**
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* identify a line as the beginning of a code block.
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*/
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protected function identifyCode($line)
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{
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// indentation >= 4 or one tab is code
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return ($l = $line[0]) === ' ' && $line[1] === ' ' && $line[2] === ' ' && $line[3] === ' ' || $l === "\t";
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}
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/**
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* Consume lines for a code block element
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*/
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protected function consumeCode($lines, $current)
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{
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// consume until newline
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$content = [];
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for ($i = $current, $count = count($lines); $i < $count; $i++) {
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$line = $lines[$i];
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// a line is considered to belong to this code block as long as it is intended by 4 spaces or a tab
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if (isset($line[0]) && ($line[0] === "\t" || strncmp($line, ' ', 4) === 0)) {
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$line = $line[0] === "\t" ? substr($line, 1) : substr($line, 4);
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$content[] = $line;
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// but also if it is empty and the next line is intended by 4 spaces or a tab
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} elseif (($line === '' || rtrim($line) === '') && isset($lines[$i + 1][0]) &&
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($lines[$i + 1][0] === "\t" || strncmp($lines[$i + 1], ' ', 4) === 0)) {
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if ($line !== '') {
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$line = $line[0] === "\t" ? substr($line, 1) : substr($line, 4);
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}
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$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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'code',
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'content' => implode("\n", $content),
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];
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return [$block, --$i];
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}
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/**
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* Renders a code block
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*/
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protected function renderCode($block)
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{
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$class = isset($block['language']) ? ' class="language-' . $block['language'] . '"' : '';
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return "<pre><code$class>" . htmlspecialchars($block['content'] . "\n", ENT_NOQUOTES | ENT_SUBSTITUTE, 'UTF-8') . "</code></pre>\n";
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}
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}
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