PhutilRemarkupEngineMultiLineEnclosedBlockRule.php
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	<?php

	/**
	* @group markup
	* @stable
	*/
	abstract class PhutilRemarkupEngineMultiLineEnclosedBlockRule
	extends PhutilRemarkupEngineBlockRule {

	abstract public function getBlockSpecifier();

	/**
	* Parse the a block from given lines with the start and end marked by
	* a block specifier.
	*
	* @param array $lines
	* @param int $cursor
	*
	* @return int
	*/
	public function getMatchingLineCount(array $lines, $cursor) {
	$spec = $this->getBlockSpecifier();
	$num_lines = 0;
	$match_ticks = null;
	if (preg_match("/^(\s{2,}).+/", $lines[$cursor])) {
	$match_ticks = false;
	} else if (preg_match("/^(${spec})/", $lines[$cursor])) {
	$match_ticks = true;
	} else {
	return $num_lines;
	}

	$num_lines++;

	if ($match_ticks &&
	preg_match("/^({$spec})(.)(${spec})\s$/", $lines[$cursor])) {
	return $num_lines;
	}

	$cursor++;

	while (isset($lines[$cursor])) {
	if ($match_ticks) {
	if (preg_match("/{$spec}\s*$/", $lines[$cursor])) {
	$num_lines++;
	break;
	}
	$num_lines++;
	} else {
	if (strlen(trim($lines[$cursor]))) {
	if (!preg_match('/^\s{2,}/', $lines[$cursor])) {
	break;
	}
	}
	$num_lines++;
	}
	$cursor++;
	}

	return $num_lines;
	}

	}