PhutilRemarkupEngineBlockRule.php
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	<?php

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

	private $engine;
	private $rules = array();

	abstract public function getBlockPattern();
	abstract public function shouldMergeBlocks();
	abstract public function markupText($text);

	protected function didMarkupText() {
	return;
	}

	public function shouldMatchBlock($block) {
	return preg_match($this->getBlockPattern(), $block);
	}

	public function shouldContinueWithBlock($block, $last_block) {
	return false;
	}

	final public function setEngine(PhutilRemarkupEngine $engine) {
	$this->engine = $engine;
	return $this;
	}

	final protected function getEngine() {
	return $this->engine;
	}

	public function setMarkupRules(array $rules) {
	assert_instances_of($rules, 'PhutilRemarkupRule');
	$this->rules = $rules;
	return $this;
	}

	final private function getMarkupRules() {
	return $this->rules;
	}

	final public function postprocess() {
	$engine = $this->getEngine();
	$this->didMarkupText();
	foreach ($this->getMarkupRules() as $rule) {
	$rule->setEngine($engine);
	$rule->didMarkupText();
	}
	}

	final protected function applyRules($text) {
	$engine = $this->getEngine();
	foreach ($this->getMarkupRules() as $rule) {
	$rule->setEngine($engine);
	$text = $rule->apply($text);
	}
	return $text;
	}


	}