PhutilLexerSyntaxHighlighter.php
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	<?php

	/**
	* @group markup
	*/
	final class PhutilLexerSyntaxHighlighter extends PhutilSyntaxHighlighter {

	private $config = array();

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

	public function getHighlightFuture($source) {
	$strip = false;
	$state = 'start';
	$lang = idx($this->config, 'language');

	if ($lang == 'php') {
	if (strpos($source, '<?') === false) {
	$state = 'php';
	}
	}

	$lexer = idx($this->config, 'lexer');
	$tokens = $lexer->getTokens($source, $state);
	$tokens = $lexer->mergeTokens($tokens);

	$result = array();
	foreach ($tokens as $token) {
	list($type, $value, $context) = $token;
	$value = phutil_escape_html($value);

	$data_name = null;
	switch ($type) {
	case 'nc':
	case 'nf':
	case 'na':
	$data_name = ' data-symbol-name="'.$value.'"';
	break;
	}

	$data_context = null;
	if ($context) {
	$context = phutil_escape_html($context);
	$data_context = ' data-symbol-context="'.$context.'"';
	}

	$class_name = null;
	if ($type) {
	$class_name = ' class="'.$type.'"';
	}

	if (strpos($value, "\n") !== false) {
	$value = explode("\n", $value);
	} else {
	$value = array($value);
	}
	foreach ($value as $part) {
	if (strlen($part)) {
	if ($class_name) {
	$result[] =
	'<span'.$class_name.$data_context.$data_name.'>'.
	$part.
	'</span>';
	} else {
	$result[] = $part;
	}
	}
	$result[] = "\n";
	}

	// Throw away the last "\n".
	array_pop($result);
	}

	$result = implode('', $result);

	return new ImmediateFuture($result);
	}

	}