Differential D20977 Diff 49988 src/infrastructure/markup/syntax/highlighter/PhutilDivinerSyntaxHighlighter.php

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src/infrastructure/markup/syntax/highlighter/PhutilDivinerSyntaxHighlighter.php

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				<?php

				/**
				* Simple syntax highlighter for the ".diviner" format, which is just Remarkup
				* with a specific ruleset. This should also work alright for Remarkup.
				*/
				final class PhutilDivinerSyntaxHighlighter extends Phobject {

				private $config = array();
				private $replaceClass;

				public function setConfig($key, $value) {
				$this->config[$key] = $value;
				return $this;
				}

				public function getHighlightFuture($source) {
				$source = phutil_escape_html($source);

				// This highlighter isn't perfect but tries to do an okay job at getting
				// some of the basics at least. There's lots of room for improvement.

				$blocks = explode("\n\n", $source);
				foreach ($blocks as $key => $block) {
				if (preg_match('/^[^ ](?! )/m', $block)) {
				$blocks[$key] = $this->highlightBlock($block);
				}
				}
				$source = implode("\n\n", $blocks);

				$source = phutil_safe_html($source);
				return new ImmediateFuture($source);
				}

				private function highlightBlock($source) {
				// Highlight "@{class:...}" links to other documentation pages.
				$source = $this->highlightPattern('/@{([\w@]+?):([^}]+?)}/', $source, 'nc');

				// Highlight "@title", "@group", etc.
				$source = $this->highlightPattern('/^@(\w+)/m', $source, 'k');

				// Highlight bold, italic and monospace.
				$source = $this->highlightPattern('@\\\\(.+?)\\\\@s', $source, 's');
				$source = $this->highlightPattern('@(?<!:)//(.+?)//@s', $source, 's');
				$source = $this->highlightPattern(
				'@##([\s\S]+?)##\|\B`(.+?)`\B@',
				$source,
				's');

				// Highlight stuff that looks like headers.
				$source = $this->highlightPattern('/^=(.*)$/m', $source, 'nv');

				return $source;
				}

				private function highlightPattern($regexp, $source, $class) {
				$this->replaceClass = $class;
				$source = preg_replace_callback(
				$regexp,
				array($this, 'replacePattern'),
				$source);

				return $source;
				}

				public function replacePattern($matches) {

				// NOTE: The goal here is to make sure a <span> never crosses a newline.

				$content = $matches[0];
				$content = explode("\n", $content);
				foreach ($content as $key => $line) {
				$content[$key] =
				'<span class="'.$this->replaceClass.'">'.
				$line.
				'</span>';
				}
				return implode("\n", $content);
				}

				}