mirror of
https://github.com/YunoHost-Apps/bozon_ynh.git
synced 2024-09-03 18:16:09 +02:00
509 lines
No EOL
17 KiB
PHP
509 lines
No EOL
17 KiB
PHP
<?php
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#
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#
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# Parsedown
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# http://parsedown.org
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#
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# (c) Emanuil Rusev
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# http://erusev.com
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#
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#This version is not the original: it's a class to function conversion by Bronco (http:www.warriordudimanche.net)
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#Thanks a lot to Emanuil Rusev for this script ! It saved me lots of time ! ;-)
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function url2link($url){
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return preg_replace('!(((?:https?|ftp|file)://|apt:|magnet:)\S+[[:alnum:]]/?)!si','<a href="$1" rel="nofollow">$1</a>',$url);
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;
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}
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global $escape_sequence_map;
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function parse($text)
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{
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# removes UTF-8 BOM and marker characters
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$text = preg_replace('{^\xEF\xBB\xBF|\x1A}', '', $text);
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# removes \r characters
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$text = str_replace("\r\n", "\n", $text);
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$text = str_replace("\r", "\n", $text);
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# replaces tabs with spaces
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$text = str_replace("\t", ' ', $text);
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# encodes escape sequences
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if (strpos($text, '\\') !== FALSE)
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{
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$escape_sequences = array('\\\\', '\`', '\*', '\_', '\{', '\}', '\[', '\]', '\(', '\)', '\>', '\#', '\+', '\-', '\.', '\!');
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foreach ($escape_sequences as $index => $escape_sequence)
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{
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if (strpos($text, $escape_sequence) !== FALSE)
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{
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$code = "\x1A".'\\'.$index.';';
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$text = str_replace($escape_sequence, $code, $text);
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$escape_sequence_map[$code] = $escape_sequence;
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}
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}
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}
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# ~
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$text = preg_replace('/\n\s*\n/', "\n\n", $text);
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$text = trim($text, "\n");
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$lines = explode("\n", $text);
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$text = parse_block_elements($lines);
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# decodes escape sequences
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if (!empty($escape_sequence_map)){
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foreach ($escape_sequence_map as $code => $escape_sequence)
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{
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$text = str_replace($code, $escape_sequence[1], $text);
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}
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}
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$text = rtrim($text, "\n");
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return $text;
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}
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function parse_block_elements(array $lines, $context = '')
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{
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$elements = array();
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$element = array('type' => '',);
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foreach ($lines as $line)
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{
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# markup (open)
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if ($element['type'] === 'markup' and ! isset($element['closed']))
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{
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if (preg_match('{<'.$element['subtype'].'>$}', $line)) # opening tag
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{
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$element['depth']++;
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}
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if (preg_match('{</'.$element['subtype'].'>$}', $line)) # closing tag
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{
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$element['depth'] > 0
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? $element['depth']--
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: $element['closed'] = true;
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}
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$element['text'] .= "\n".$line;
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continue;
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}
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# *
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if ($line === '')
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{
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$element['interrupted'] = true;
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continue;
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}
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# blockquote (existing)
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if ($element['type'] === 'blockquote' and ! isset($element['interrupted']))
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{
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$line = preg_replace('/^[ ]*>[ ]?/', '', $line);
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$element['lines'] []= $line;
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continue;
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}
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# list (existing)
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if ($element['type'] === 'li')
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{
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if (preg_match('/^([ ]{0,3})(\d+[.]|[*+-])[ ](.*)/', $line, $matches))
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{
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if ($element['indentation'] !== $matches[1])
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{
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$element['lines'] []= $line;
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}
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else
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{
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unset($element['last']);
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$elements []= $element;
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$element = array(
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'type' => 'li',
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'indentation' => $matches[1],
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'last' => true,
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'lines' => array(
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preg_replace('/^[ ]{0,4}/', '', $matches[3]),
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),
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);
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}
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continue;
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}
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if (isset($element['interrupted']))
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{
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if ($line[0] === ' ')
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{
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$element['lines'] []= '';
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$line = preg_replace('/^[ ]{0,4}/', '', $line);
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$element['lines'] []= $line;
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continue;
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}
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}
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else
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{
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$line = preg_replace('/^[ ]{0,4}/', '', $line);
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$element['lines'] []= $line;
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continue;
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}
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}
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# paragraph
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if ($line[0] >= 'a' or $line[0] >= 'A' and $line[0] <= 'Z')
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{
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goto paragraph;
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}
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# code block
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if ($line[0] === ' ' and preg_match('/^[ ]{4}(.*)/', $line, $matches))
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{
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if (trim($line) === ''){continue;}
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if ($element['type'] === 'code')
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{
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if (isset($element['interrupted']))
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{
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$element['text'] .= "\n";
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unset ($element['interrupted']);
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}
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$element['text'] .= "\n".$matches[1];
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}
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else
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{
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$elements []= $element;
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$element = array(
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'type' => 'code',
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'text' => $matches[1],
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);
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}
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continue;
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}
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# setext heading (---)
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if ($line[0] === '-' and $element['type'] === 'p' and ! isset($element['interrupted']) and preg_match('/^[-]+[ ]*$/', $line))
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{
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$element['type'] = 'h.';
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$element['level'] = 2;
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continue;
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}
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# atx heading (#)
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if ($line[0] === '#' and preg_match('/^(#{1,6})[ ]*(.+?)[ ]*#*$/', $line, $matches))
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{
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$elements []= $element;
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$level = strlen($matches[1]);
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$element = array(
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'type' => 'h.',
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'text' => $matches[2],
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'level' => $level,
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);
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continue;
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}
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# setext heading (===)
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if ($line[0] === '=' and $element['type'] === 'p' and ! isset($element['interrupted']) and preg_match('/^[=]+[ ]*$/', $line))
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{
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$element['type'] = 'h.';
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$element['level'] = 1;
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continue;
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}
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$deindented_line = $line[0] !== ' ' ? $line : ltrim($line);
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if ($deindented_line === ''){continue;}
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# reference
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if ($deindented_line[0] === '[' and preg_match('/^\[(.+?)\]:[ ]*([^ ]+)/', $deindented_line, $matches))
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{
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$label = strtolower($matches[1]);
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$url = trim($matches[2], '<>');
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$reference_map[$label] = $url;
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continue;
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}
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# blockquote
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if ($deindented_line[0] === '>' and preg_match('/^>[ ]?(.*)/', $deindented_line, $matches))
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{
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if ($element['type'] === 'blockquote')
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{
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if (isset($element['interrupted']))
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{
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$element['lines'] []= '';
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unset($element['interrupted']);
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}
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$element['lines'] []= $matches[1];
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}
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else
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{
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$elements []= $element;
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$element = array(
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'type' => 'blockquote',
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'lines' => array(
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$matches[1],
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),
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);
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}
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continue;
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}
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# markup
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if ($deindented_line[0] === '<')
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{
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# self-closing tag
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if (preg_match('{^<.+?/>$}', $deindented_line))
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{
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$elements []= $element;
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$element = array(
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'type' => '',
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'text' => $deindented_line,
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);
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continue;
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}
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# opening tag
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if (preg_match('{^<(\w+)(?:[ ].*?)?>}', $deindented_line, $matches))
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{
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$elements []= $element;
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$element = array(
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'type' => 'markup',
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'subtype' => strtolower($matches[1]),
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'text' => $deindented_line,
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'depth' => 0,
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);
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preg_match('{</'.$matches[1].'>\s*$}', $deindented_line) and $element['closed'] = true;
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continue;
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}
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}
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# horizontal rule
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if (preg_match('/^([-*_])([ ]{0,2}\1){2,}[ ]*$/', $deindented_line))
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{
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$elements []= $element;
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$element = array('type' => 'hr',);
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continue;
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}
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# list item
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if (preg_match('/^([ ]*)(\d+[.]|[*+-])[ ](.*)/', $line, $matches))
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{
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$elements []= $element;
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$element = array(
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'type' => 'li',
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'ordered' => isset($matches[2][1]),
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'indentation' => $matches[1],
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'last' => true,
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'lines' => array(
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preg_replace('/^[ ]{0,4}/', '', $matches[3]),
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),
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);
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continue;
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}
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paragraph:
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if ($element['type'] === 'p')
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{
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if (isset($element['interrupted']))
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{
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$elements []= $element;
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$element['text'] = $line;
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unset($element['interrupted']);
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}
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else {$element['text'] .= "\n".$line;}
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}
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else
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{
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$elements []= $element;
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$element = array(
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'type' => 'p',
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'text' => $line,
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);
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}
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}
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$elements []= $element;
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array_shift($elements);
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$markup = '';
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foreach ($elements as $index => $element)
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{
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switch ($element['type'])
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{
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case 'p':
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$text = parse_span_elements($element['text']);
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$text = preg_replace('/[ ]{2}\n/', '<br />'."\n", $text);
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if ($context === 'li' and $index === 0)
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{
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if (isset($element['interrupted'])) { $markup .= "\n".'<p>'.$text.'</p>'."\n";}
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else {$markup .= $text;}
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}
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else{$markup .= '<p>'.$text.'</p>'."\n";}
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break;
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case 'blockquote':
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$text =parse_block_elements($element['lines']);
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$markup .= '<blockquote>'."\n".$text.'</blockquote>'."\n";
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break;
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case 'code':
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$text = htmlentities($element['text'], ENT_NOQUOTES);
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strpos($text, "\x1A\\") !== FALSE and $text = strtr($text, $escape_sequence_map);
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$markup .= '<pre><code>'.$text.'</code></pre>'."\n";
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break;
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case 'h.':
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$text = parse_span_elements($element['text']);
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$markup .= '<h'.$element['level'].'>'.$text.'</h'.$element['level'].'>'."\n";
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break;
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case 'hr':
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$markup .= '<hr />'."\n";
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break;
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case 'li':
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if (isset($element['ordered'])) # first
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{
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$list_type = $element['ordered'] ? 'ol' : 'ul';
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$markup .= '<'.$list_type.'>'."\n";
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}
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if (isset($element['interrupted']) and ! isset($element['last']))
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{
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$element['lines'] []= '';
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}
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$text = parse_block_elements($element['lines'], 'li');
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$markup .= '<li>'.$text.'</li>'."\n";
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isset($element['last']) and $markup .= '</'.$list_type.'>'."\n";
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break;
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default:
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$markup .= $element['text']."\n";
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}
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}
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return $markup;
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}
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function parse_span_elements($text)
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{
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$map = array();
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$index = 0;
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# code span
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if (strpos($text, '`') !== FALSE and preg_match_all('/`(.+?)`/', $text, $matches, PREG_SET_ORDER))
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{
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foreach ($matches as $matches)
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{
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$element_text = $matches[1];
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$element_text = htmlentities($element_text, ENT_NOQUOTES);
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# decodes escape sequences
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$escape_sequence_map
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and strpos($element_text, "\x1A") !== FALSE
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and $element_text = strtr($element_text, $escape_sequence_map);
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# composes element
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$element = '<code>'.$element_text.'</code>';
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# encodes element
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$code = "\x1A".'$'.$index;
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$text = str_replace($matches[0], $code, $text);
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$map[$code] = $element;
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$index ++;
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}
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}
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# inline link or image
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if (strpos($text, '](') !== FALSE and preg_match_all('/(!?)(\[((?:[^\[\]]|(?2))*)\])\((.*?)\)/', $text, $matches, PREG_SET_ORDER)) # inline
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{
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foreach ($matches as $matches)
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{
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$url = $matches[4];
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strpos($url, '&') !== FALSE and $url = preg_replace('/&(?!#?\w+;)/', '&', $url);
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if ($matches[1]) # image
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{
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$element = '<img alt="'.$matches[3].'" src="'.$url.'">';
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}
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else
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{
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$element_text =parse_span_elements($matches[3]);
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$element = '<a href="'.$url.'">'.$element_text.'</a>';
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}
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$code = "\x1A".'$'.$index;
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$text = str_replace($matches[0], $code, $text);
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$map[$code] = $element;
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$index ++;
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}
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}
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# reference link or image
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if (strpos($text, '[') !== FALSE and preg_match_all('/(!?)\[(.+?)\](?:\n?[ ]?\[(.*?)\])?/ms', $text, $matches, PREG_SET_ORDER))
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{
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foreach ($matches as $matches)
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{
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$link_definition = isset($matches[3]) && $matches[3]
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? $matches[3]
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: $matches[2]; # implicit
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$link_definition = strtolower($link_definition);
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if (isset($reference_map[$link_definition]))
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{
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$url = $reference_map[$link_definition];
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strpos($url, '&') !== FALSE and $url = preg_replace('/&(?!#?\w+;)/', '&', $url);
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if ($matches[1]) # image
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{
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$element = '<img alt="'.$matches[2].'" src="'.$url.'">';
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}
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else # anchor
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{
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$element_text = parse_span_elements($matches[2]);
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$element = '<a href="'.$url.'">'.$element_text.'</a>';
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}
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$code = "\x1A".'$'.$index;
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$text = str_replace($matches[0], $code, $text);
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$map[$code] = $element;
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$index ++;
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}
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}
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}
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# automatic link
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if (strpos($text, '<') !== FALSE and preg_match_all('/<((https?|ftp|dict):[^\^\s]+?)>/i', $text, $matches, PREG_SET_ORDER))
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{
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foreach ($matches as $matches)
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{
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$url = $matches[1];
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strpos($url, '&') !== FALSE and $url = preg_replace('/&(?!#?\w+;)/', '&', $url);
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$element = '<a href=":href">:text</a>';
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$element = str_replace(':text', $url, $element);
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$element = str_replace(':href', $url, $element);
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$code = "\x1A".'$'.$index;
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$text = str_replace($matches[0], $code, $text);
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$map[$code] = $element;
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$index ++;
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}
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}
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strpos($text, '&') !== FALSE and $text = preg_replace('/&(?!#?\w+;)/', '&', $text);
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strpos($text, '<') !== FALSE and $text = preg_replace('/<(?!\/?\w.*?>)/', '<', $text);
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if (strpos($text, '_') !== FALSE)
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{
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$text = preg_replace('/__(?=\S)(.+?)(?<=\S)__(?!_)/s', '<strong>$1</strong>', $text);
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$text = preg_replace('/_(?=\S)(.+?)(?<=\S)_/s', '<em>$1</em>', $text);
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}
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if (strpos($text, '*') !== FALSE)
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{
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$text = preg_replace('/\*\*(?=\S)(.+?)(?<=\S)\*\*(?!\*)/s', '<strong>$1</strong>', $text);
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$text = preg_replace('/\*(?=\S)(.+?)(?<=\S)\*/s', '<em>$1</em>', $text);
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}
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$text = strtr($text, $map);
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return $text;
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}
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?>
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