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vendor/cebe/markdown/block/CodeTrait.php

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