PhutilRemarkupEngineRemarkupHeaderBlockRule.php
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	<?php

	/*
	* Copyright 2011 Facebook, Inc.
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	/**
	* @group markup
	*/
	class PhutilRemarkupEngineRemarkupHeaderBlockRule
	extends PhutilRemarkupEngineBlockRule {

	public function getBlockPattern() {
	return '/^(={1,5})(.?)\\1?\s$/';
	}

	public function shouldMergeBlocks() {
	return false;
	}

	public function markupText($text) {
	$level = 1;
	for ($ii = 0; $ii < min(5, strlen($text)); $ii++) {
	if ($text[$ii] == '=') {
	++$level;
	}
	}
	$text = trim($text, ' =');

	return '<h'.$level.'>'.$this->applyRules($text).'</h'.$level.'>';
	}

	}