mirror of
https://github.com/erusev/parsedown.git
synced 2023-08-10 21:13:06 +03:00
1319 lines
32 KiB
PHP
Executable File
1319 lines
32 KiB
PHP
Executable File
<?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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# For the full license information, view the LICENSE file that was distributed
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# with this source code.
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#
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#
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class Parsedown
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{
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#
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# Philosophy
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# Markdown is intended to be easy-to-read by humans - those of us who read
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# line by line, left to right, top to bottom. In order to take advantage of
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# this, Parsedown tries to read in a similar way. It breaks texts into
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# lines, it iterates through them and it looks at how they start and relate
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# to each other.
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#
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# ~
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function text($text)
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{
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# standardize line breaks
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$text = str_replace("\r\n", "\n", $text);
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$text = str_replace("\r", "\n", $text);
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# replace tabs with spaces
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$text = str_replace("\t", ' ', $text);
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# remove surrounding line breaks
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$text = trim($text, "\n");
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# split text into lines
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$lines = explode("\n", $text);
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# iterate through lines to identify blocks
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$markup = $this->lines($lines);
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# trim line breaks
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$markup = trim($markup, "\n");
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# clean up
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$this->references = array();
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return $markup;
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}
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#
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# Setters
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#
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function setBreaksEnabled($breaksEnabled)
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{
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$this->breaksEnabled = $breaksEnabled;
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return $this;
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}
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private $breaksEnabled;
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#
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# Blocks
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#
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protected $blockMarkers = array(
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'#' => array('Atx'),
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'*' => array('Rule', 'List'),
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'+' => array('List'),
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'-' => array('Setext', 'Table', 'Rule', 'List'),
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'0' => array('List'),
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'1' => array('List'),
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'2' => array('List'),
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'3' => array('List'),
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'4' => array('List'),
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'5' => array('List'),
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'6' => array('List'),
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'7' => array('List'),
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'8' => array('List'),
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'9' => array('List'),
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':' => array('Table'),
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'<' => array('Markup'),
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'=' => array('Setext'),
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'>' => array('Quote'),
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'[' => array('Reference'),
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'_' => array('Rule'),
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'`' => array('FencedCode'),
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'|' => array('Table'),
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'~' => array('FencedCode'),
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);
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# Draft
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protected $definitionMarkers = array(
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'[' => array('Reference'),
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);
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protected $unmarkedBlockTypes = array(
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'CodeBlock',
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);
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private function lines(array $lines)
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{
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$CurrentBlock = null;
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foreach ($lines as $line)
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{
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$indent = 0;
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while (true)
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{
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if (isset($line[$indent]))
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{
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if ($line[$indent] === ' ')
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{
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$indent ++;
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}
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else
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{
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break;
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}
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}
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else # blank line
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{
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if (isset($CurrentBlock))
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{
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$CurrentBlock['interrupted'] = true;
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}
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continue 2;
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}
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}
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$text = $indent > 0 ? substr($line, $indent) : $line;
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# ~
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$Line = array('body' => $line, 'indent' => $indent, 'text' => $text);
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# Multiline block types define "addTo" methods.
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if (isset($CurrentBlock['incomplete']))
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{
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$Block = $this->{'addTo'.$CurrentBlock['type']}($Line, $CurrentBlock);
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if (isset($Block))
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{
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$CurrentBlock = $Block;
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continue;
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}
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else
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{
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if (method_exists($this, 'complete'.$CurrentBlock['type']))
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{
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$CurrentBlock = $this->{'complete'.$CurrentBlock['type']}($CurrentBlock);
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}
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unset($CurrentBlock['incomplete']);
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}
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}
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# ~
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$blockTypes = $this->unmarkedBlockTypes;
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$marker = $text[0];
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if (isset($this->blockMarkers[$marker]))
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{
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foreach ($this->blockMarkers[$marker] as $blockType)
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{
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$blockTypes []= $blockType;
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}
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}
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#
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# ~
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foreach ($blockTypes as $blockType)
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{
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# Block types define "identify" methods.
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$Block = $this->{'identify'.$blockType}($Line, $CurrentBlock);
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if (isset($Block))
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{
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$Block['type'] = $blockType;
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if ( ! isset($Block['identified'])) # »
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{
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$Elements []= $CurrentBlock['element'];
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$Block['identified'] = true;
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}
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# Multiline block types define "addTo" methods.
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if (method_exists($this, 'addTo'.$blockType))
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{
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$Block['incomplete'] = true;
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}
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$CurrentBlock = $Block;
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continue 2;
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}
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}
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# ~
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if ($CurrentBlock['type'] === 'Paragraph' and ! isset($CurrentBlock['interrupted']))
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{
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$CurrentBlock['element']['text'] .= "\n".$text;
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}
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else
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{
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$Elements []= $CurrentBlock['element'];
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$CurrentBlock = array(
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'type' => 'Paragraph',
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'identified' => true,
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'element' => array(
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'name' => 'p',
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'text' => $text,
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'handler' => 'line',
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),
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);
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}
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}
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# ~
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if (isset($CurrentBlock['incomplete']) and method_exists($this, 'complete'.$CurrentBlock['type']))
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{
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$CurrentBlock = $this->{'complete'.$CurrentBlock['type']}($CurrentBlock);
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}
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# ~
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$Elements []= $CurrentBlock['element'];
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unset($Elements[0]);
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# ~
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$markup = $this->elements($Elements);
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# ~
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return $markup;
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}
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#
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# Atx
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protected function identifyAtx($Line)
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{
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if (isset($Line['text'][1]))
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{
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$level = 1;
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while (isset($Line['text'][$level]) and $Line['text'][$level] === '#')
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{
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$level ++;
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}
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$text = trim($Line['text'], '# ');
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$Block = array(
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'element' => array(
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'name' => 'h'.$level,
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'text' => $text,
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'handler' => 'line',
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),
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);
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return $Block;
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}
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}
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#
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# Rule
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protected function identifyRule($Line)
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{
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if (preg_match('/^(['.$Line['text'][0].'])([ ]{0,2}\1){2,}[ ]*$/', $Line['text']))
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{
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$Block = array(
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'element' => array(
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'name' => 'hr'
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),
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);
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return $Block;
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}
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}
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#
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# Reference
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protected function identifyReference($Line)
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{
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if (preg_match('/^\[(.+?)\]:[ ]*<?(\S+?)>?(?:[ ]+["\'(](.+)["\')])?[ ]*$/', $Line['text'], $matches))
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{
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$label = strtolower($matches[1]);
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$this->references[$label] = array(
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'url' => $matches[2],
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);
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if (isset($matches[3]))
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{
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$this->references[$label]['title'] = $matches[3];
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}
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$Block = array(
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'element' => null,
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);
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return $Block;
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}
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}
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#
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# Setext
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protected function identifySetext($Line, array $Block = null)
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{
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if ( ! isset($Block) or $Block['type'] !== 'Paragraph' or isset($Block['interrupted']))
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{
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return;
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}
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if (chop($Line['text'], $Line['text'][0]) === '')
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{
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$Block['element']['name'] = $Line['text'][0] === '=' ? 'h1' : 'h2';
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return $Block;
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}
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}
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#
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# Markup
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protected function identifyMarkup($Line)
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{
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if (preg_match('/^<(\w[\w\d]*)(?:[ ][^>\/]*)?(\/?)[ ]*>/', $Line['text'], $matches))
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{
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if (in_array($matches[1], $this->textLevelElements))
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{
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return;
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}
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$Block = array(
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'element' => $Line['body'],
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);
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if ($matches[2] or $matches[1] === 'hr' or preg_match('/<\/'.$matches[1].'>[ ]*$/', $Line['text']))
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{
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$Block['closed'] = true;
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}
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else
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{
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$Block['depth'] = 0;
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$Block['start'] = '<'.$matches[1].'>';
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$Block['end'] = '</'.$matches[1].'>';
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}
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return $Block;
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}
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}
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protected function addToMarkup($Line, array $Block)
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{
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if (isset($Block['closed']))
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{
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return;
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}
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if (stripos($Line['text'], $Block['start']) !== false) # opening tag
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{
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$Block['depth'] ++;
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}
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if (stripos($Line['text'], $Block['end']) !== false) # closing tag
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{
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if ($Block['depth'] > 0)
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{
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$Block['depth'] --;
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}
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else
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{
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$Block['closed'] = true;
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}
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}
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$Block['element'] .= "\n".$Line['body'];
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return $Block;
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}
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#
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# Fenced Code
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protected function identifyFencedCode($Line)
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{
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if (preg_match('/^(['.$Line['text'][0].']{3,})[ ]*(\w+)?[ ]*$/', $Line['text'], $matches))
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{
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$Element = array(
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'name' => 'code',
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'text' => '',
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);
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if (isset($matches[2]))
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{
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$class = 'language-'.$matches[2];
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$Element['attributes'] = array(
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'class' => $class,
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);
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}
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$Block = array(
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'char' => $Line['text'][0],
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'element' => array(
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'name' => 'pre',
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'handler' => 'element',
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'text' => $Element,
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),
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);
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return $Block;
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}
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}
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protected function addToFencedCode($Line, $Block)
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{
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if (isset($Block['complete']))
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{
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return;
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}
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if (isset($Block['interrupted']))
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{
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$Block['element']['text']['text'] .= "\n";
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unset($Block['interrupted']);
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}
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if (preg_match('/^'.$Block['char'].'{3,}[ ]*$/', $Line['text']))
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{
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$Block['element']['text']['text'] = substr($Block['element']['text']['text'], 1);
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$Block['complete'] = true;
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return $Block;
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}
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$string = htmlspecialchars($Line['body'], ENT_NOQUOTES, 'UTF-8');
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$Block['element']['text']['text'] .= "\n".$string;;
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return $Block;
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}
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#
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# List
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protected function identifyList($Line)
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{
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list($name, $pattern) = $Line['text'][0] <= '-' ? array('ul', '[*+-]') : array('ol', '[0-9]+[.]');
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if (preg_match('/^('.$pattern.'[ ]+)(.*)/', $Line['text'], $matches))
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{
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$Block = array(
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'indent' => $Line['indent'],
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'pattern' => $pattern,
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'element' => array(
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'name' => $name,
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'handler' => 'elements',
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),
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);
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$Block['li'] = array(
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'name' => 'li',
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'handler' => 'li',
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'text' => array(
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$matches[2],
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),
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);
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$Block['element']['text'] []= & $Block['li'];
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return $Block;
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}
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}
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protected function addToList($Line, array $Block)
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{
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if ($Block['indent'] === $Line['indent'] and preg_match('/^'.$Block['pattern'].'[ ]+(.*)/', $Line['text'], $matches))
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{
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if (isset($Block['interrupted']))
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{
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$Block['li']['text'] []= '';
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unset($Block['interrupted']);
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}
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unset($Block['li']);
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$Block['li'] = array(
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'name' => 'li',
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'handler' => 'li',
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'text' => array(
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$matches[1],
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),
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);
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$Block['element']['text'] []= & $Block['li'];
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return $Block;
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}
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if ( ! isset($Block['interrupted']))
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{
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$text = preg_replace('/^[ ]{0,2}/', '', $Line['body']);
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$Block['li']['text'] []= $text;
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return $Block;
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}
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if ($Line['indent'] > 0)
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{
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$Block['li']['text'] []= '';
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$text = preg_replace('/^[ ]{0,2}/', '', $Line['body']);
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$Block['li']['text'] []= $text;
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unset($Block['interrupted']);
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return $Block;
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}
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}
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#
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# Quote
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protected function identifyQuote($Line)
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{
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if (preg_match('/^>[ ]?(.*)/', $Line['text'], $matches))
|
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{
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$Block = array(
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'element' => array(
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'name' => 'blockquote',
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'handler' => 'lines',
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'text' => (array) $matches[1],
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),
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);
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return $Block;
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}
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}
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protected function addToQuote($Line, array $Block)
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{
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if ($Line['text'][0] === '>' and preg_match('/^>[ ]?(.*)/', $Line['text'], $matches))
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{
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if (isset($Block['interrupted']))
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{
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$Block['element']['text'] []= '';
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}
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$Block['element']['text'] []= $matches[1];
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return $Block;
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}
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if ( ! isset($Block['interrupted']))
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{
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$Block['element']['text'] []= $Line['text'];
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return $Block;
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}
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}
|
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#
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# Table
|
|
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protected function identifyTable($Line, array $Block = null)
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{
|
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if ( ! isset($Block) or $Block['type'] !== 'Paragraph' or isset($Block['interrupted']))
|
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{
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return;
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}
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if (strpos($Block['element']['text'], '|') !== false and chop($Line['text'], ' -:|') === '')
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{
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$alignments = array();
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$divider = $Line['text'];
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$divider = trim($divider);
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$divider = trim($divider, '|');
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$dividerCells = explode('|', $divider);
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foreach ($dividerCells as $dividerCell)
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{
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$dividerCell = trim($dividerCell);
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if ($dividerCell === '')
|
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{
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continue;
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}
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$alignment = null;
|
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|
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if ($dividerCell[0] === ':')
|
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{
|
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$alignment = 'left';
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}
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if (substr($dividerCell, -1) === ':')
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{
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$alignment = $alignment === 'left' ? 'center' : 'right';
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}
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$alignments []= $alignment;
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}
|
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# ~
|
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$HeaderElements = array();
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|
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$header = $Block['element']['text'];
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$header = trim($header);
|
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$header = trim($header, '|');
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|
|
|
$headerCells = explode('|', $header);
|
|
|
|
foreach ($headerCells as $index => $headerCell)
|
|
{
|
|
$headerCell = trim($headerCell);
|
|
|
|
$HeaderElement = array(
|
|
'name' => 'th',
|
|
'text' => $headerCell,
|
|
'handler' => 'line',
|
|
);
|
|
|
|
if (isset($alignments[$index]))
|
|
{
|
|
$alignment = $alignments[$index];
|
|
|
|
$HeaderElement['attributes'] = array(
|
|
'align' => $alignment,
|
|
);
|
|
}
|
|
|
|
$HeaderElements []= $HeaderElement;
|
|
}
|
|
|
|
# ~
|
|
|
|
$Block = array(
|
|
'alignments' => $alignments,
|
|
'identified' => true,
|
|
'element' => array(
|
|
'name' => 'table',
|
|
'handler' => 'elements',
|
|
),
|
|
);
|
|
|
|
$Block['element']['text'] []= array(
|
|
'name' => 'thead',
|
|
'handler' => 'elements',
|
|
);
|
|
|
|
$Block['element']['text'] []= array(
|
|
'name' => 'tbody',
|
|
'handler' => 'elements',
|
|
'text' => array(),
|
|
);
|
|
|
|
$Block['element']['text'][0]['text'] []= array(
|
|
'name' => 'tr',
|
|
'handler' => 'elements',
|
|
'text' => $HeaderElements,
|
|
);
|
|
|
|
return $Block;
|
|
}
|
|
}
|
|
|
|
protected function addToTable($Line, array $Block)
|
|
{
|
|
if ($Line['text'][0] === '|' or strpos($Line['text'], '|'))
|
|
{
|
|
$Elements = array();
|
|
|
|
$row = $Line['text'];
|
|
|
|
$row = trim($row);
|
|
$row = trim($row, '|');
|
|
|
|
$cells = explode('|', $row);
|
|
|
|
foreach ($cells as $index => $cell)
|
|
{
|
|
$cell = trim($cell);
|
|
|
|
$Element = array(
|
|
'name' => 'td',
|
|
'handler' => 'line',
|
|
'text' => $cell,
|
|
);
|
|
|
|
if (isset($Block['alignments'][$index]))
|
|
{
|
|
$Element['attributes'] = array(
|
|
'align' => $Block['alignments'][$index],
|
|
);
|
|
}
|
|
|
|
$Elements []= $Element;
|
|
}
|
|
|
|
$Element = array(
|
|
'name' => 'tr',
|
|
'handler' => 'elements',
|
|
'text' => $Elements,
|
|
);
|
|
|
|
$Block['element']['text'][1]['text'] []= $Element;
|
|
|
|
return $Block;
|
|
}
|
|
}
|
|
|
|
#
|
|
# Code
|
|
|
|
protected function identifyCodeBlock($Line)
|
|
{
|
|
if ($Line['indent'] >= 4)
|
|
{
|
|
$text = substr($Line['body'], 4);
|
|
$text = htmlspecialchars($text, ENT_NOQUOTES, 'UTF-8');
|
|
|
|
$Block = array(
|
|
'element' => array(
|
|
'name' => 'pre',
|
|
'handler' => 'element',
|
|
'text' => array(
|
|
'name' => 'code',
|
|
'text' => $text,
|
|
),
|
|
),
|
|
);
|
|
|
|
return $Block;
|
|
}
|
|
}
|
|
|
|
protected function addToCodeBlock($Line, $Block)
|
|
{
|
|
if ($Line['indent'] >= 4)
|
|
{
|
|
if (isset($Block['interrupted']))
|
|
{
|
|
$Block['element']['text']['text'] .= "\n";
|
|
|
|
unset($Block['interrupted']);
|
|
}
|
|
|
|
$Block['element']['text']['text'] .= "\n";
|
|
|
|
$text = substr($Line['body'], 4);
|
|
$text = htmlspecialchars($text, ENT_NOQUOTES, 'UTF-8');
|
|
|
|
$Block['element']['text']['text'] .= $text;
|
|
|
|
return $Block;
|
|
}
|
|
}
|
|
|
|
#
|
|
# ~
|
|
#
|
|
|
|
private function element(array $Element)
|
|
{
|
|
$markup = '<'.$Element['name'];
|
|
|
|
if (isset($Element['attributes']))
|
|
{
|
|
foreach ($Element['attributes'] as $name => $value)
|
|
{
|
|
$markup .= ' '.$name.'="'.$value.'"';
|
|
}
|
|
}
|
|
|
|
if (isset($Element['text']))
|
|
{
|
|
$markup .= '>';
|
|
|
|
if (isset($Element['handler']))
|
|
{
|
|
$markup .= $this->$Element['handler']($Element['text']);
|
|
}
|
|
else
|
|
{
|
|
$markup .= $Element['text'];
|
|
}
|
|
|
|
$markup .= '</'.$Element['name'].'>';
|
|
}
|
|
else
|
|
{
|
|
$markup .= ' />';
|
|
}
|
|
|
|
return $markup;
|
|
}
|
|
|
|
private function elements(array $Elements)
|
|
{
|
|
$markup = '';
|
|
|
|
foreach ($Elements as $Element)
|
|
{
|
|
if ($Element === null)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
$markup .= "\n";
|
|
|
|
if (is_string($Element)) # because of markup
|
|
{
|
|
$markup .= $Element;
|
|
|
|
continue;
|
|
}
|
|
|
|
$markup .= $this->element($Element);
|
|
}
|
|
|
|
$markup .= "\n";
|
|
|
|
return $markup;
|
|
}
|
|
|
|
#
|
|
# Spans
|
|
#
|
|
|
|
protected $spanMarkers = array(
|
|
'!' => array('Link'), # ?
|
|
'&' => array('Ampersand'),
|
|
'*' => array('Emphasis'),
|
|
'/' => array('Url'),
|
|
'<' => array('UrlTag', 'EmailTag', 'Tag', 'LessThan'),
|
|
'[' => array('Link'),
|
|
'_' => array('Emphasis'),
|
|
'`' => array('InlineCode'),
|
|
'~' => array('Strikethrough'),
|
|
'\\' => array('EscapeSequence'),
|
|
);
|
|
|
|
protected $spanMarkerList = '*_!&[</`~\\';
|
|
|
|
public function line($text)
|
|
{
|
|
$markup = '';
|
|
|
|
$remainder = $text;
|
|
|
|
$markerPosition = 0;
|
|
|
|
while ($markedExcerpt = strpbrk($remainder, $this->spanMarkerList))
|
|
{
|
|
$marker = $markedExcerpt[0];
|
|
|
|
$markerPosition += strpos($remainder, $marker);
|
|
|
|
foreach ($this->spanMarkers[$marker] as $spanType)
|
|
{
|
|
$handler = 'identify'.$spanType;
|
|
|
|
$Span = $this->$handler($markedExcerpt, $text);
|
|
|
|
if (isset($Span))
|
|
{
|
|
# The identified span can be ahead of the marker.
|
|
|
|
if (isset($Span['position']) and $Span['position'] > $markerPosition)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
# Spans that start at the position of their marker don't have to set a position.
|
|
|
|
if ( ! isset($Span['position']))
|
|
{
|
|
$Span['position'] = $markerPosition;
|
|
}
|
|
|
|
$unmarkedText = substr($text, 0, $Span['position']);
|
|
|
|
$markup .= $this->readPlainText($unmarkedText);
|
|
|
|
$markup .= isset($Span['element']) ? $this->element($Span['element']) : $Span['markup'];
|
|
|
|
$text = substr($text, $Span['position'] + $Span['extent']);
|
|
|
|
$remainder = $text;
|
|
|
|
$markerPosition = 0;
|
|
|
|
continue 2;
|
|
}
|
|
}
|
|
|
|
$remainder = substr($markedExcerpt, 1);
|
|
|
|
$markerPosition ++;
|
|
}
|
|
|
|
$markup .= $this->readPlainText($text);
|
|
|
|
return $markup;
|
|
}
|
|
|
|
#
|
|
# ~
|
|
#
|
|
|
|
protected function identifyUrl($excerpt, $text)
|
|
{
|
|
if ( ! isset($excerpt[1]) or $excerpt[1] !== '/')
|
|
{
|
|
return;
|
|
}
|
|
|
|
if (preg_match('/\bhttps?:[\/]{2}[^\s]+\b\/*/ui', $text, $matches, PREG_OFFSET_CAPTURE))
|
|
{
|
|
$url = str_replace(array('&', '<'), array('&', '<'), $matches[0][0]);
|
|
|
|
return array(
|
|
'extent' => strlen($matches[0][0]),
|
|
'position' => $matches[0][1],
|
|
'element' => array(
|
|
'name' => 'a',
|
|
'text' => $url,
|
|
'attributes' => array(
|
|
'href' => $url,
|
|
),
|
|
),
|
|
);
|
|
}
|
|
}
|
|
|
|
protected function identifyAmpersand($excerpt)
|
|
{
|
|
if ( ! preg_match('/^&#?\w+;/', $excerpt))
|
|
{
|
|
return array(
|
|
'markup' => '&',
|
|
'extent' => 1,
|
|
);
|
|
}
|
|
}
|
|
|
|
protected function identifyStrikethrough($excerpt)
|
|
{
|
|
if ( ! isset($excerpt[1]))
|
|
{
|
|
return;
|
|
}
|
|
|
|
if ($excerpt[1] === $excerpt[0] and preg_match('/^~~(?=\S)(.+?)(?<=\S)~~/', $excerpt, $matches))
|
|
{
|
|
return array(
|
|
'extent' => strlen($matches[0]),
|
|
'element' => array(
|
|
'name' => 'del',
|
|
'text' => $matches[1],
|
|
'handler' => 'line',
|
|
),
|
|
);
|
|
}
|
|
}
|
|
|
|
protected function identifyEscapeSequence($excerpt)
|
|
{
|
|
if (in_array($excerpt[1], $this->specialCharacters))
|
|
{
|
|
return array(
|
|
'markup' => $excerpt[1],
|
|
'extent' => 2,
|
|
);
|
|
}
|
|
}
|
|
|
|
protected function identifyLessThan()
|
|
{
|
|
return array(
|
|
'markup' => '<',
|
|
'extent' => 1,
|
|
);
|
|
}
|
|
|
|
protected function identifyUrlTag($excerpt)
|
|
{
|
|
if (strpos($excerpt, '>') !== false and preg_match('/^<(https?:[\/]{2}[^\s]+?)>/i', $excerpt, $matches))
|
|
{
|
|
$url = str_replace(array('&', '<'), array('&', '<'), $matches[1]);
|
|
|
|
return array(
|
|
'extent' => strlen($matches[0]),
|
|
'element' => array(
|
|
'name' => 'a',
|
|
'text' => $url,
|
|
'attributes' => array(
|
|
'href' => $url,
|
|
),
|
|
),
|
|
);
|
|
}
|
|
}
|
|
|
|
protected function identifyEmailTag($excerpt)
|
|
{
|
|
if (strpos($excerpt, '>') !== false and preg_match('/<(\S+?@\S+?)>/', $excerpt, $matches))
|
|
{
|
|
return array(
|
|
'extent' => strlen($matches[0]),
|
|
'element' => array(
|
|
'name' => 'a',
|
|
'text' => $matches[1],
|
|
'attributes' => array(
|
|
'href' => 'mailto:'.$matches[1],
|
|
),
|
|
),
|
|
);
|
|
}
|
|
}
|
|
|
|
protected function identifyTag($excerpt)
|
|
{
|
|
if (strpos($excerpt, '>') !== false and preg_match('/^<\/?\w.*?>/', $excerpt, $matches))
|
|
{
|
|
return array(
|
|
'markup' => $matches[0],
|
|
'extent' => strlen($matches[0]),
|
|
);
|
|
}
|
|
}
|
|
|
|
protected function identifyInlineCode($excerpt)
|
|
{
|
|
$marker = $excerpt[0];
|
|
|
|
if (preg_match('/^('.$marker.'+)[ ]*(.+?)[ ]*(?<!'.$marker.')\1(?!'.$marker.')/', $excerpt, $matches))
|
|
{
|
|
$text = $matches[2];
|
|
$text = htmlspecialchars($text, ENT_NOQUOTES, 'UTF-8');
|
|
|
|
return array(
|
|
'extent' => strlen($matches[0]),
|
|
'element' => array(
|
|
'name' => 'code',
|
|
'text' => $text,
|
|
),
|
|
);
|
|
}
|
|
}
|
|
|
|
protected function identifyLink($excerpt)
|
|
{
|
|
$extent = $excerpt[0] === '!' ? 1 : 0;
|
|
|
|
if (strpos($excerpt, ']') and preg_match('/\[((?:[^][]|(?R))*)\]/', $excerpt, $matches))
|
|
{
|
|
$Link = array('text' => $matches[1], 'label' => strtolower($matches[1]));
|
|
|
|
$extent += strlen($matches[0]);
|
|
|
|
$substring = substr($excerpt, $extent);
|
|
|
|
if (preg_match('/^\s*\[(.+?)\]/', $substring, $matches))
|
|
{
|
|
$Link['label'] = strtolower($matches[1]);
|
|
|
|
if (isset($this->references[$Link['label']]))
|
|
{
|
|
$Link += $this->references[$Link['label']];
|
|
|
|
$extent += strlen($matches[0]);
|
|
}
|
|
else
|
|
{
|
|
return;
|
|
}
|
|
}
|
|
elseif ($this->references and isset($this->references[$Link['label']]))
|
|
{
|
|
$Link += $this->references[$Link['label']];
|
|
|
|
if (preg_match('/^[ ]*\[\]/', $substring, $matches))
|
|
{
|
|
$extent += strlen($matches[0]);
|
|
}
|
|
}
|
|
elseif (preg_match('/^\([ ]*(.*?)(?:[ ]+[\'"](.+?)[\'"])?[ ]*\)/', $substring, $matches))
|
|
{
|
|
$Link['url'] = $matches[1];
|
|
|
|
if (isset($matches[2]))
|
|
{
|
|
$Link['title'] = $matches[2];
|
|
}
|
|
|
|
$extent += strlen($matches[0]);
|
|
}
|
|
else
|
|
{
|
|
return;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
return;
|
|
}
|
|
|
|
$url = str_replace(array('&', '<'), array('&', '<'), $Link['url']);
|
|
|
|
if ($excerpt[0] === '!')
|
|
{
|
|
$Element = array(
|
|
'name' => 'img',
|
|
'attributes' => array(
|
|
'alt' => $Link['text'],
|
|
'src' => $url,
|
|
),
|
|
);
|
|
}
|
|
else
|
|
{
|
|
$Element = array(
|
|
'name' => 'a',
|
|
'handler' => 'line',
|
|
'text' => $Link['text'],
|
|
'attributes' => array(
|
|
'href' => $url,
|
|
),
|
|
);
|
|
}
|
|
|
|
if (isset($Link['title']))
|
|
{
|
|
$Element['attributes']['title'] = $Link['title'];
|
|
}
|
|
|
|
return array(
|
|
'extent' => $extent,
|
|
'element' => $Element,
|
|
);
|
|
}
|
|
|
|
protected function identifyEmphasis($excerpt)
|
|
{
|
|
if ( ! isset($excerpt[1]))
|
|
{
|
|
return;
|
|
}
|
|
|
|
$marker = $excerpt[0];
|
|
|
|
if ($excerpt[1] === $marker and preg_match($this->strongRegex[$marker], $excerpt, $matches))
|
|
{
|
|
$emphasis = 'strong';
|
|
}
|
|
elseif (preg_match($this->emRegex[$marker], $excerpt, $matches))
|
|
{
|
|
$emphasis = 'em';
|
|
}
|
|
else
|
|
{
|
|
return;
|
|
}
|
|
|
|
return array(
|
|
'extent' => strlen($matches[0]),
|
|
'element' => array(
|
|
'name' => $emphasis,
|
|
'handler' => 'line',
|
|
'text' => $matches[1],
|
|
),
|
|
);
|
|
}
|
|
|
|
#
|
|
# ~
|
|
|
|
protected function readPlainText($text)
|
|
{
|
|
$breakMarker = $this->breaksEnabled ? "\n" : " \n";
|
|
|
|
$text = str_replace($breakMarker, "<br />\n", $text);
|
|
|
|
return $text;
|
|
}
|
|
|
|
#
|
|
# ~
|
|
#
|
|
|
|
protected function li($lines)
|
|
{
|
|
$markup = $this->lines($lines);
|
|
|
|
$trimmedMarkup = trim($markup);
|
|
|
|
if ( ! in_array('', $lines) and substr($trimmedMarkup, 0, 3) === '<p>')
|
|
{
|
|
$markup = $trimmedMarkup;
|
|
$markup = substr($markup, 3);
|
|
|
|
$position = strpos($markup, "</p>");
|
|
|
|
$markup = substr_replace($markup, '', $position, 4);
|
|
}
|
|
|
|
return $markup;
|
|
}
|
|
|
|
#
|
|
# Multiton
|
|
#
|
|
|
|
static function instance($name = 'default')
|
|
{
|
|
if (isset(self::$instances[$name]))
|
|
{
|
|
return self::$instances[$name];
|
|
}
|
|
|
|
$instance = new self();
|
|
|
|
self::$instances[$name] = $instance;
|
|
|
|
return $instance;
|
|
}
|
|
|
|
private static $instances = array();
|
|
|
|
#
|
|
# Deprecated Methods
|
|
#
|
|
|
|
/**
|
|
* @deprecated in favor of "text"
|
|
*/
|
|
function parse($text)
|
|
{
|
|
$markup = $this->text($text);
|
|
|
|
return $markup;
|
|
}
|
|
|
|
#
|
|
# Fields
|
|
#
|
|
|
|
protected $references = array(); # » Definitions['reference']
|
|
|
|
#
|
|
# Read-only
|
|
|
|
protected $specialCharacters = array(
|
|
'\\', '`', '*', '_', '{', '}', '[', ']', '(', ')', '>', '#', '+', '-', '.', '!',
|
|
);
|
|
|
|
protected $strongRegex = array(
|
|
'*' => '/^[*]{2}((?:[^*]|[*][^*]*[*])+?)[*]{2}(?![*])/s',
|
|
'_' => '/^__((?:[^_]|_[^_]*_)+?)__(?!_)/us',
|
|
);
|
|
|
|
protected $emRegex = array(
|
|
'*' => '/^[*]((?:[^*]|[*][*][^*]+?[*][*])+?)[*](?![*])/s',
|
|
'_' => '/^_((?:[^_]|__[^_]*__)+?)_(?!_)\b/us',
|
|
);
|
|
|
|
protected $textLevelElements = array(
|
|
'a', 'br', 'bdo', 'abbr', 'blink', 'nextid', 'acronym', 'basefont',
|
|
'b', 'em', 'big', 'cite', 'small', 'spacer', 'listing',
|
|
'i', 'rp', 'sub', 'code', 'strike', 'marquee',
|
|
'q', 'rt', 'sup', 'font', 'strong',
|
|
's', 'tt', 'var', 'mark',
|
|
'u', 'xm', 'wbr', 'nobr',
|
|
'ruby',
|
|
'span',
|
|
'time',
|
|
);
|
|
}
|