FSHL Handler for Texy

config.neon

services:
	- AmphibianDemo\Model\FshlHandler
	-
		class: Texy
		setup:
			- addHandler(block, [ @AmphibianDemo\Model\FshlHandler, handleBlock ])
			- $tabWidth(4)
			- $allowedClasses(TRUE)
			- $allowedTags(TRUE)
			- $allowedStyles(TRUE)
			- $allowed([blocks: TRUE])
	-
		class: FSHL\Highlighter
		arguments: [ ..., 2 ]
	- FSHL\Output\Html

FshlHandler.php

<?php

namespace AmphibianDemo\Model;

use FSHL\Highlighter;
use Texy;
use TexyHandlerInvocation;
use TexyHtml;
use TexyModifier;

class FshlHandler
{

	/**
	 * @var \FSHL\Highlighter
	 */
	private $highlighter;

	public function __construct(Highlighter $highlighter)
	{
		$this->highlighter = $highlighter;
	}

	/**
	 * @param \TexyHandlerInvocation $invocation
	 * @param string $blocktype
	 * @param string $content
	 * @param string $lang
	 * @param \TexyModifier $modifier
	 * @return string
	 */
	public function handleBlock(
		TexyHandlerInvocation $invocation,
		$blocktype,
		$content,
		$lang,
		TexyModifier $modifier
	)
	{
		if ($blocktype !== 'block/code') {
			return $invocation->proceed();
		}

		$lang = strtolower($lang);
		$lexerClass = '\FSHL\Lexer\\' . ucfirst($lang);
		if (class_exists($lexerClass)) {
			$this->highlighter->setLexer(new $lexerClass());
		} else {
			return $invocation->proceed();
		}

		$texy = $invocation->getTexy();
		$content = Texy::outdent($content);
		$content = $this->highlighter->highlight($content);
		$content = $texy->protect($content, Texy::CONTENT_BLOCK);

		$elPre = TexyHtml::el('pre');
		$modifier->decorate($texy, $elPre);

		$elPre->attrs['class'] = $lang;
		$elPre->create('code', $content);
		return $elPre->toString($texy);
	}

}