PhutilPygmentizeParser.php
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PhutilPygmentizeParser.php
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	<?php

	/**
	* Parser that converts `pygmetize` output or similar HTML blocks from "class"
	* attributes to "style" attributes.
	*/
	final class PhutilPygmentizeParser extends Phobject {

	private $map = array();

	public function setMap(array $map) {
	$this->map = $map;
	return $this;
	}

	public function getMap() {
	return $this->map;
	}

	public function parse($block) {
	$class_look = 'class="';
	$class_len = strlen($class_look);

	$class_start = null;

	$map = $this->map;

	$len = strlen($block);
	$out = '';
	$mode = 'text';
	for ($ii = 0; $ii < $len; $ii++) {
	$c = $block[$ii];
	switch ($mode) {
	case 'text':
	// We're in general text between tags, and just passing characters
	// through unmodified.
	if ($c == '<') {
	$mode = 'tag';
	}
	$out .= $c;
	break;
	case 'tag':
	// We're inside a tag, and looking for `class="` so we can rewrite
	// it.
	if ($c == '>') {
	$mode = 'text';
	}
	if ($c == 'c') {
	if (!substr_compare($block, $class_look, $ii, $class_len)) {
	$mode = 'class';
	$ii += $class_len;
	$class_start = $ii;
	}
	}

	if ($mode != 'class') {
	$out .= $c;
	}
	break;
	case 'class':
	// We're inside a `class="..."` tag, and looking for the ending quote
	// so we can replace it.
	if ($c == '"') {
	$class = substr($block, $class_start, $ii - $class_start);

	// If this class is present in the map, rewrite it into an inline
	// style attribute.
	if (isset($map[$class])) {
	$out .= 'style="'.phutil_escape_html($map[$class]).'"';
	} else {
	$out .= 'class="'.$class.'"';
	}

	$mode = 'tag';
	}
	break;
	}
	}

	return $out;
	}

	}