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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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|
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namespace cebe\markdownparser\block; |
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|
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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] === ' ' || $l === "\t"; |
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} |
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|
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/** |
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* Consume lines for a code block element |
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*/ |
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protected function consumeCode($lines, $current) |
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{ |
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// consume until newline |
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|
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$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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|
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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[] = $line; |
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} else { |
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break; |
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} |
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} |
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|
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$block = [ |
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'code', |
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'content' => implode("\n", $content), |
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]; |
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return [$block, --$i]; |
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} |
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|
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/** |
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* Renders a code block |
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*/ |
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protected function renderCode($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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|
