PhutilRemarkupEngineRemarkupReplyBlockRule.php
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	<?php

	final class PhutilRemarkupEngineRemarkupReplyBlockRule
	extends PhutilRemarkupEngineBlockRule {

	public function getPriority() {
	return 400.0;
	}

	public function getMatchingLineCount(array $lines, $cursor) {
	$pos = $cursor;

	if (preg_match('/^>>!/', $lines[$pos])) {
	do {
	++$pos;
	} while (isset($lines[$pos]) && preg_match('/^>/', $lines[$pos]));
	}

	return ($pos - $cursor);
	}

	public function supportsChildBlocks() {
	return true;
	}

	public function extractChildText($text) {
	$text = phutil_split_lines($text, true);

	$head = array();
	$body = array();

	$head = substr(reset($text), 3);

	$body = array_slice($text, 1);

	// Remove the carets.
	foreach ($body as $key => $line) {
	$body[$key] = substr($line, 1);
	}

	// Strip leading empty lines.
	foreach ($body as $key => $line) {
	if (strlen(trim($line))) {
	break;
	}
	unset($body[$key]);
	}

	return array(trim($head), implode('', $body));
	}

	public function markupText($text, $children) {
	$text = $this->applyRules($text);

	if ($this->getEngine()->isTextMode()) {
	$children = phutil_split_lines($children, true);
	foreach ($children as $key => $child) {
	if (strlen(trim($child))) {
	$children[$key] = '> '.$child;
	} else {
	$children[$key] = '>'.$child;
	}
	}
	$children = implode('', $children);

	return $text."\n\n".$children;
	}

	return phutil_tag(
	'blockquote',
	array(
	'class' => 'remarkup-reply-block',
	),
	array(
	"\n",
	phutil_tag(
	'div',
	array(
	'class' => 'remarkup-reply-head',
	),
	$text),
	"\n",
	phutil_tag(
	'div',
	array(
	'class' => 'remarkup-reply-body',
	),
	$children),
	"\n",
	));
	}

	}