Comments for Parsedown

ParseDownExtension.php

<?php

/**
 * Adds support for
 * {comm}
 * Multiline comment block
 * {/comm}
 * and {lcomm}inline comment{/lcomm}.
 *
 * Comments will be ignored in page output.
 *
 * Inline comments over whole line produce empty <p> tag. This change fix it: https://github.com/integer/parsedown/commit/c28065b8c107ecb0117674598f55ba70346aee41
 */
class ParseDownExtension extends Parsedown
{

    public function __construct()
    {
        $this->InlineTypes['{'] []= 'CommentInline';
        $this->inlineMarkerList .= '{';

        $this->BlockTypes['{'] []= 'CommentBlock';
    }

    protected function inlineCommentInline($Excerpt)
    {
        if (preg_match('/^{lcomm}(.*?){\/lcomm}/', $Excerpt['text'], $matches))
        {
            return array(
                'extent' => strlen($matches[0]),
                'markup' => '',
                'text' => null,
            );
        }
    }

    protected function blockCommentBlock($Line, $Block)
    {
        if (preg_match('/\{comm\}/', $Line['text'], $matches))
        {
            return array(
                'hidden' => true,
            );
        }
    }

    protected function blockCommentBlockContinue($Line, $Block)
    {
        if (isset($Block['complete'])) {
            return;
        }

        // A blank newline has occurred
        if (isset($Block['interrupted'])) {
            unset($Block['interrupted']);
        }

        //Check for end of the block.
        if (preg_match('/\{\/comm\}/', $Line['text'])) {
            $Block['complete'] = true;
            return $Block;
        }

        return $Block;
    }

}