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parsedown/Parsedown.php

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<?php
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#
#
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# Parsedown
# http://parsedown.org
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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
# with this source code.
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#
#
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class Parsedown
{
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# ~
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const version = '1.7.1';
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# ~
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function text($text)
{
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# make sure no definitions are set
$this->DefinitionData = array();
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# standardize line breaks
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$text = str_replace(array("\r\n", "\r"), "\n", $text);
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# remove surrounding line breaks
$text = trim($text, "\n");
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# split text into lines
$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
$markup = trim($markup, "\n");
return $markup;
}
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#
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# Setters
#
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function setBreaksEnabled($breaksEnabled)
{
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$this->breaksEnabled = $breaksEnabled;
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return $this;
}
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protected $breaksEnabled;
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function setMarkupEscaped($markupEscaped)
{
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$this->markupEscaped = $markupEscaped;
return $this;
}
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protected $markupEscaped;
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function setUrlsLinked($urlsLinked)
{
$this->urlsLinked = $urlsLinked;
return $this;
}
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protected $urlsLinked = true;
function setSafeMode($safeMode)
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{
$this->safeMode = (bool) $safeMode;
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return $this;
}
protected $safeMode;
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protected $safeLinksWhitelist = array(
'http://',
'https://',
'ftp://',
'ftps://',
'mailto:',
'data:image/png;base64,',
'data:image/gif;base64,',
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'data:image/jpeg;base64,',
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'irc:',
'ircs:',
'git:',
'ssh:',
'news:',
'steam:',
);
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#
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# Lines
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#
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protected $BlockTypes = array(
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'#' => array('Header'),
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'*' => array('Rule', 'List'),
'+' => array('List'),
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'-' => array('SetextHeader', 'Table', 'Rule', 'List'),
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'0' => array('List'),
'1' => array('List'),
'2' => array('List'),
'3' => array('List'),
'4' => array('List'),
'5' => array('List'),
'6' => array('List'),
'7' => array('List'),
'8' => array('List'),
'9' => array('List'),
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':' => array('Table'),
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'<' => array('Comment', 'Markup'),
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'=' => array('SetextHeader'),
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'>' => array('Quote'),
'[' => array('Reference'),
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'_' => array('Rule'),
'`' => array('FencedCode'),
'|' => array('Table'),
'~' => array('FencedCode'),
);
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# ~
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protected $unmarkedBlockTypes = array(
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'Code',
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);
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#
# Blocks
#
protected function lines(array $lines)
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{
$CurrentBlock = null;
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foreach ($lines as $line)
{
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if (chop($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;
}
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if (strpos($line, "\t") !== false)
{
$parts = explode("\t", $line);
$line = $parts[0];
unset($parts[0]);
foreach ($parts as $part)
{
$shortage = 4 - mb_strlen($line, 'utf-8') % 4;
$line .= str_repeat(' ', $shortage);
$line .= $part;
}
}
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$indent = 0;
while (isset($line[$indent]) and $line[$indent] === ' ')
{
$indent ++;
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}
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$text = $indent > 0 ? substr($line, $indent) : $line;
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# ~
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$Line = array('body' => $line, 'indent' => $indent, 'text' => $text);
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# ~
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if (isset($CurrentBlock['continuable']))
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{
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$Block = $this->{'block'.$CurrentBlock['type'].'Continue'}($Line, $CurrentBlock);
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if (isset($Block))
{
$CurrentBlock = $Block;
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continue;
}
else
{
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if ($this->isBlockCompletable($CurrentBlock['type']))
{
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$CurrentBlock = $this->{'block'.$CurrentBlock['type'].'Complete'}($CurrentBlock);
}
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}
}
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# ~
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$marker = $text[0];
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# ~
$blockTypes = $this->unmarkedBlockTypes;
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if (isset($this->BlockTypes[$marker]))
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{
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foreach ($this->BlockTypes[$marker] as $blockType)
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{
$blockTypes []= $blockType;
}
}
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#
# ~
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foreach ($blockTypes as $blockType)
{
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$Block = $this->{'block'.$blockType}($Line, $CurrentBlock);
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if (isset($Block))
{
$Block['type'] = $blockType;
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if ( ! isset($Block['identified']))
{
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$Blocks []= $CurrentBlock;
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$Block['identified'] = true;
}
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if ($this->isBlockContinuable($blockType))
{
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$Block['continuable'] = true;
}
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$CurrentBlock = $Block;
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continue 2;
}
}
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# ~
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if (isset($CurrentBlock) and ! isset($CurrentBlock['type']) and ! isset($CurrentBlock['interrupted']))
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{
$CurrentBlock['element']['text'] .= "\n".$text;
}
else
{
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$Blocks []= $CurrentBlock;
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$CurrentBlock = $this->paragraph($Line);
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$CurrentBlock['identified'] = true;
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}
}
# ~
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if (isset($CurrentBlock['continuable']) and $this->isBlockCompletable($CurrentBlock['type']))
{
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$CurrentBlock = $this->{'block'.$CurrentBlock['type'].'Complete'}($CurrentBlock);
}
# ~
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$Blocks []= $CurrentBlock;
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unset($Blocks[0]);
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# ~
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$markup = '';
foreach ($Blocks as $Block)
{
if (isset($Block['hidden']))
{
continue;
}
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$markup .= "\n";
$markup .= isset($Block['markup']) ? $Block['markup'] : $this->element($Block['element']);
}
$markup .= "\n";
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# ~
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return $markup;
}
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protected function isBlockContinuable($Type)
{
return method_exists($this, 'block'.$Type.'Continue');
}
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protected function isBlockCompletable($Type)
{
return method_exists($this, 'block'.$Type.'Complete');
}
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#
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# Code
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protected function blockCode($Line, $Block = null)
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{
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if (isset($Block) and ! isset($Block['type']) and ! isset($Block['interrupted']))
{
return;
}
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if ($Line['indent'] >= 4)
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{
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$text = substr($Line['body'], 4);
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$Block = array(
'element' => array(
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'name' => 'pre',
'handler' => 'element',
'text' => array(
'name' => 'code',
'text' => $text,
),
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),
);
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return $Block;
}
}
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protected function blockCodeContinue($Line, $Block)
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{
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if ($Line['indent'] >= 4)
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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($Block['interrupted']);
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}
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$Block['element']['text']['text'] .= "\n";
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$text = substr($Line['body'], 4);
$Block['element']['text']['text'] .= $text;
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return $Block;
}
}
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protected function blockCodeComplete($Block)
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{
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$text = $Block['element']['text']['text'];
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$Block['element']['text']['text'] = $text;
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return $Block;
}
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#
# Comment
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protected function blockComment($Line)
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{
if ($this->markupEscaped or $this->safeMode)
{
return;
}
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if (isset($Line['text'][3]) and $Line['text'][3] === '-' and $Line['text'][2] === '-' and $Line['text'][1] === '!')
{
$Block = array(
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'markup' => $Line['body'],
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);
if (preg_match('/-->$/', $Line['text']))
{
$Block['closed'] = true;
}
return $Block;
}
}
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protected function blockCommentContinue($Line, array $Block)
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{
if (isset($Block['closed']))
{
return;
}
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$Block['markup'] .= "\n" . $Line['body'];
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if (preg_match('/-->$/', $Line['text']))
{
$Block['closed'] = true;
}
return $Block;
}
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#
# Fenced Code
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protected function blockFencedCode($Line)
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{
if (preg_match('/^['.$Line['text'][0].']{3,}[ ]*([^`]+)?[ ]*$/', $Line['text'], $matches))
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{
$Element = array(
'name' => 'code',
'text' => '',
);
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if (isset($matches[1]))
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{
$class = 'language-'.$matches[1];
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$Element['attributes'] = array(
'class' => $class,
);
}
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$Block = array(
'char' => $Line['text'][0],
'element' => array(
'name' => 'pre',
'handler' => 'element',
'text' => $Element,
),
);
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return $Block;
}
}
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protected function blockFencedCodeContinue($Line, $Block)
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{
if (isset($Block['complete']))
{
return;
}
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if (isset($Block['interrupted']))
{
$Block['element']['text']['text'] .= "\n";
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unset($Block['interrupted']);
}
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if (preg_match('/^'.$Block['char'].'{3,}[ ]*$/', $Line['text']))
{
$Block['element']['text']['text'] = substr($Block['element']['text']['text'], 1);
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$Block['complete'] = true;
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return $Block;
}
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$Block['element']['text']['text'] .= "\n".$Line['body'];
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return $Block;
}
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protected function blockFencedCodeComplete($Block)
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{
$text = $Block['element']['text']['text'];
$Block['element']['text']['text'] = $text;
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return $Block;
}
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#
# Header
protected function blockHeader($Line)
{
if (isset($Line['text'][1]))
{
$level = 1;
while (isset($Line['text'][$level]) and $Line['text'][$level] === '#')
{
$level ++;
}
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if ($level > 6)
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{
return;
}
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$text = trim($Line['text'], '# ');
$Block = array(
'element' => array(
'name' => 'h' . min(6, $level),
'text' => $text,
'handler' => 'line',
),
);
return $Block;
}
}
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#
# List
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protected function blockList($Line)
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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))
{
$Block = array(
'indent' => $Line['indent'],
'pattern' => $pattern,
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'element' => array(
'name' => $name,
'handler' => 'elements',
),
);
if($name === 'ol')
{
$listStart = stristr($matches[0], '.', true);
if($listStart !== '1')
{
$Block['element']['attributes'] = array('start' => $listStart);
}
}
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$Block['li'] = array(
'name' => 'li',
'handler' => 'li',
'text' => array(
$matches[2],
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),
);
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$Block['element']['text'] []= & $Block['li'];
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return $Block;
}
}
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protected function blockListContinue($Line, array $Block)
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{
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if ($Block['indent'] === $Line['indent'] and preg_match('/^'.$Block['pattern'].'(?:[ ]+(.*)|$)/', $Line['text'], $matches))
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{
if (isset($Block['interrupted']))
{
$Block['li']['text'] []= '';
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$Block['loose'] = true;
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unset($Block['interrupted']);
}
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unset($Block['li']);
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$text = isset($matches[1]) ? $matches[1] : '';
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$Block['li'] = array(
'name' => 'li',
'handler' => 'li',
'text' => array(
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$text,
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),
);
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$Block['element']['text'] []= & $Block['li'];
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return $Block;
}
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if ($Line['text'][0] === '[' and $this->blockReference($Line))
{
return $Block;
}
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if ( ! isset($Block['interrupted']))
{
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$text = preg_replace('/^[ ]{0,4}/', '', $Line['body']);
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$Block['li']['text'] []= $text;
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return $Block;
}
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if ($Line['indent'] > 0)
{
$Block['li']['text'] []= '';
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$text = preg_replace('/^[ ]{0,4}/', '', $Line['body']);
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$Block['li']['text'] []= $text;
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unset($Block['interrupted']);
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return $Block;
}
}
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protected function blockListComplete(array $Block)
{
if (isset($Block['loose']))
{
foreach ($Block['element']['text'] as &$li)
{
if (end($li['text']) !== '')
{
$li['text'] []= '';
}
}
}
return $Block;
}
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#
# Quote
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protected function blockQuote($Line)
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{
if (preg_match('/^>[ ]?(.*)/', $Line['text'], $matches))
{
$Block = array(
'element' => array(
'name' => 'blockquote',
'handler' => 'lines',
'text' => (array) $matches[1],
),
);
return $Block;
}
}
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protected function blockQuoteContinue($Line, array $Block)
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{
if ($Line['text'][0] === '>' and preg_match('/^>[ ]?(.*)/', $Line['text'], $matches))
{
if (isset($Block['interrupted']))
{
$Block['element']['text'] []= '';
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unset($Block['interrupted']);
}
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$Block['element']['text'] []= $matches[1];
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return $Block;
}
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2014-04-17 11:59:35 +04:00
if ( ! isset($Block['interrupted']))
{
$Block['element']['text'] []= $Line['text'];
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2014-04-17 11:59:35 +04:00
return $Block;
}
}
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#
# Rule
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protected function blockRule($Line)
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{
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if (preg_match('/^(['.$Line['text'][0].'])([ ]*\1){2,}[ ]*$/', $Line['text']))
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{
$Block = array(
'element' => array(
'name' => 'hr'
),
);
return $Block;
}
}
#
# Setext
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protected function blockSetextHeader($Line, array $Block = null)
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{
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if ( ! isset($Block) or isset($Block['type']) or isset($Block['interrupted']))
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{
return;
}
if (chop($Line['text'], $Line['text'][0]) === '')
{
$Block['element']['name'] = $Line['text'][0] === '=' ? 'h1' : 'h2';
return $Block;
}
}
#
# Markup
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protected function blockMarkup($Line)
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{
if ($this->markupEscaped or $this->safeMode)
{
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return;
}
if (preg_match('/^<(\w[\w-]*)(?:[ ]*'.$this->regexHtmlAttribute.')*[ ]*(\/)?>/', $Line['text'], $matches))
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{
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$element = strtolower($matches[1]);
if (in_array($element, $this->textLevelElements))
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{
return;
}
$Block = array(
'name' => $matches[1],
'depth' => 0,
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'markup' => $Line['text'],
);
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$length = strlen($matches[0]);
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$remainder = substr($Line['text'], $length);
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if (trim($remainder) === '')
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{
if (isset($matches[2]) or in_array($matches[1], $this->voidElements))
{
$Block['closed'] = true;
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$Block['void'] = true;
}
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}
else
{
if (isset($matches[2]) or in_array($matches[1], $this->voidElements))
{
return;
}
if (preg_match('/<\/'.$matches[1].'>[ ]*$/i', $remainder))
{
$Block['closed'] = true;
}
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}
return $Block;
}
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}
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protected function blockMarkupContinue($Line, array $Block)
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{
if (isset($Block['closed']))
{
return;
}
if (preg_match('/^<'.$Block['name'].'(?:[ ]*'.$this->regexHtmlAttribute.')*[ ]*>/i', $Line['text'])) # open
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{
$Block['depth'] ++;
}
if (preg_match('/(.*?)<\/'.$Block['name'].'>[ ]*$/i', $Line['text'], $matches)) # close
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{
if ($Block['depth'] > 0)
{
$Block['depth'] --;
}
else
{
$Block['closed'] = true;
}
}
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if (isset($Block['interrupted']))
{
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$Block['markup'] .= "\n";
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unset($Block['interrupted']);
}
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$Block['markup'] .= "\n".$Line['body'];
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return $Block;
}
#
# Reference
protected function blockReference($Line)
{
if (preg_match('/^\[(.+?)\]:[ ]*<?(\S+?)>?(?:[ ]+["\'(](.+)["\')])?[ ]*$/', $Line['text'], $matches))
{
$id = strtolower($matches[1]);
$Data = array(
'url' => $matches[2],
'title' => null,
);
if (isset($matches[3]))
{
$Data['title'] = $matches[3];
}
$this->DefinitionData['Reference'][$id] = $Data;
$Block = array(
'hidden' => true,
);
return $Block;
}
}
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#
# Table
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protected function blockTable($Line, array $Block = null)
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{
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if ( ! isset($Block) or isset($Block['type']) or isset($Block['interrupted']))
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{
return;
}
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if (strpos($Block['element']['text'], '|') !== false and chop($Line['text'], ' -:|') === '')
{
$alignments = array();
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$divider = $Line['text'];
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$divider = trim($divider);
$divider = trim($divider, '|');
2013-11-10 00:23:56 +04:00
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$dividerCells = explode('|', $divider);
2013-11-09 01:40:00 +04:00
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foreach ($dividerCells as $dividerCell)
{
$dividerCell = trim($dividerCell);
2013-11-09 01:40:00 +04:00
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if ($dividerCell === '')
{
continue;
}
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$alignment = null;
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if ($dividerCell[0] === ':')
{
$alignment = 'left';
}
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if (substr($dividerCell, - 1) === ':')
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{
$alignment = $alignment === 'left' ? 'center' : 'right';
}
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$alignments []= $alignment;
}
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# ~
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$HeaderElements = array();
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$header = $Block['element']['text'];
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$header = trim($header);
$header = trim($header, '|');
2013-11-09 01:40:00 +04:00
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$headerCells = explode('|', $header);
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foreach ($headerCells as $index => $headerCell)
{
$headerCell = trim($headerCell);
2013-11-02 23:42:55 +04:00
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$HeaderElement = array(
'name' => 'th',
'text' => $headerCell,
'handler' => 'line',
);
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if (isset($alignments[$index]))
{
$alignment = $alignments[$index];
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$HeaderElement['attributes'] = array(
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'style' => 'text-align: '.$alignment.';',
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);
}
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$HeaderElements []= $HeaderElement;
}
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# ~
2013-12-26 23:53:48 +04:00
2014-04-17 11:59:35 +04:00
$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 $Block;
}
}
2014-02-05 16:03:23 +04:00
2015-01-05 00:34:19 +03:00
protected function blockTableContinue($Line, array $Block)
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{
2015-01-15 03:45:45 +03:00
if (isset($Block['interrupted']))
{
return;
}
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if ($Line['text'][0] === '|' or strpos($Line['text'], '|'))
{
$Elements = array();
2014-02-05 16:03:23 +04:00
2014-04-17 11:59:35 +04:00
$row = $Line['text'];
2014-02-05 16:03:23 +04:00
2014-04-17 11:59:35 +04:00
$row = trim($row);
$row = trim($row, '|');
2014-02-05 16:03:23 +04:00
2015-01-15 22:09:52 +03:00
preg_match_all('/(?:(\\\\[|])|[^|`]|`[^`]+`|`)+/', $row, $matches);
2014-02-06 04:36:22 +04:00
2015-01-15 22:09:52 +03:00
foreach ($matches[0] as $index => $cell)
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{
$cell = trim($cell);
2013-11-09 01:40:00 +04:00
2014-04-17 11:59:35 +04:00
$Element = array(
'name' => 'td',
'handler' => 'line',
'text' => $cell,
);
2014-02-05 16:03:23 +04:00
2014-04-17 11:59:35 +04:00
if (isset($Block['alignments'][$index]))
{
$Element['attributes'] = array(
2015-01-16 01:04:18 +03:00
'style' => 'text-align: '.$Block['alignments'][$index].';',
2014-04-17 11:59:35 +04:00
);
}
2014-04-17 11:59:35 +04:00
$Elements []= $Element;
}
2013-11-09 01:40:00 +04:00
2014-04-17 11:59:35 +04:00
$Element = array(
'name' => 'tr',
'handler' => 'elements',
'text' => $Elements,
);
2014-04-17 11:59:35 +04:00
$Block['element']['text'][1]['text'] []= $Element;
2014-04-17 11:59:35 +04:00
return $Block;
}
}
2014-04-17 11:59:35 +04:00
#
# ~
#
2013-11-09 01:40:00 +04:00
2015-01-05 00:34:19 +03:00
protected function paragraph($Line)
2014-05-11 23:31:02 +04:00
{
$Block = array(
'element' => array(
'name' => 'p',
'text' => $Line['text'],
'handler' => 'line',
),
);
return $Block;
}
2014-04-17 11:59:35 +04:00
#
# Inline Elements
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#
2013-11-09 01:40:00 +04:00
2015-01-05 00:34:19 +03:00
protected $InlineTypes = array(
'"' => array('SpecialCharacter'),
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'!' => array('Image'),
'&' => array('SpecialCharacter'),
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'*' => array('Emphasis'),
':' => array('Url'),
'<' => array('UrlTag', 'EmailTag', 'Markup', 'SpecialCharacter'),
'>' => array('SpecialCharacter'),
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'[' => array('Link'),
'_' => array('Emphasis'),
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'`' => array('Code'),
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'~' => array('Strikethrough'),
'\\' => array('EscapeSequence'),
);
2014-05-05 15:39:40 +04:00
# ~
protected $inlineMarkerList = '!"*_&[:<>`~\\';
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#
# ~
#
public function line($text, $nonNestables=array())
2014-04-17 11:59:35 +04:00
{
$markup = '';
2015-06-25 01:05:05 +03:00
# $excerpt is based on the first occurrence of a marker
2015-06-25 01:05:05 +03:00
while ($excerpt = strpbrk($text, $this->inlineMarkerList))
2014-04-17 11:59:35 +04:00
{
$marker = $excerpt[0];
2013-11-09 01:40:00 +04:00
2015-06-25 01:05:05 +03:00
$markerPosition = strpos($text, $marker);
$Excerpt = array('text' => $excerpt, 'context' => $text);
2013-11-09 01:40:00 +04:00
foreach ($this->InlineTypes[$marker] as $inlineType)
{
# check to see if the current inline type is nestable in the current context
if ( ! empty($nonNestables) and in_array($inlineType, $nonNestables))
{
continue;
}
$Inline = $this->{'inline'.$inlineType}($Excerpt);
2014-01-20 11:26:25 +04:00
if ( ! isset($Inline))
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{
2014-04-28 03:10:18 +04:00
continue;
}
2014-01-20 11:26:25 +04:00
2015-06-25 01:05:05 +03:00
# makes sure that the inline belongs to "our" marker
if (isset($Inline['position']) and $Inline['position'] > $markerPosition)
{
continue;
}
2015-06-25 01:05:05 +03:00
# sets a default inline position
if ( ! isset($Inline['position']))
{
$Inline['position'] = $markerPosition;
}
# cause the new element to 'inherit' our non nestables
foreach ($nonNestables as $non_nestable)
{
$Inline['element']['nonNestables'][] = $non_nestable;
}
2015-06-25 01:05:05 +03:00
# the text that comes before the inline
$unmarkedText = substr($text, 0, $Inline['position']);
2015-06-25 01:05:05 +03:00
# compile the unmarked text
$markup .= $this->unmarkedText($unmarkedText);
2014-01-21 00:19:23 +04:00
2015-06-25 01:05:05 +03:00
# compile the inline
$markup .= isset($Inline['markup']) ? $Inline['markup'] : $this->element($Inline['element']);
2014-01-21 00:19:23 +04:00
2015-06-25 01:05:05 +03:00
# remove the examined text
$text = substr($text, $Inline['position'] + $Inline['extent']);
2014-04-28 03:10:18 +04:00
continue 2;
2014-04-17 11:59:35 +04:00
}
2015-06-25 01:05:05 +03:00
# the marker does not belong to an inline
$unmarkedText = substr($text, 0, $markerPosition + 1);
$markup .= $this->unmarkedText($unmarkedText);
2013-07-11 00:22:16 +04:00
2015-06-25 01:05:05 +03:00
$text = substr($text, $markerPosition + 1);
2014-04-17 11:59:35 +04:00
}
$markup .= $this->unmarkedText($text);
2014-04-17 11:59:35 +04:00
return $markup;
}
2014-04-17 11:59:35 +04:00
#
# ~
#
protected function inlineCode($Excerpt)
2014-12-15 01:52:03 +03:00
{
$marker = $Excerpt['text'][0];
2014-12-15 01:52:03 +03:00
if (preg_match('/^('.$marker.'+)[ ]*(.+?)[ ]*(?<!'.$marker.')\1(?!'.$marker.')/s', $Excerpt['text'], $matches))
2014-04-17 11:59:35 +04:00
{
2015-01-16 04:18:07 +03:00
$text = $matches[2];
$text = preg_replace("/[ ]*\n/", ' ', $text);
2014-04-17 11:59:35 +04:00
return array(
'extent' => strlen($matches[0]),
'element' => array(
2015-01-16 04:18:07 +03:00
'name' => 'code',
'text' => $text,
2014-04-17 11:59:35 +04:00
),
);
}
}
protected function inlineEmailTag($Excerpt)
2014-04-17 11:59:35 +04:00
{
$hostnameLabel = '[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?';
$commonMarkEmail = '[a-zA-Z0-9.!#$%&\'*+\/=?^_`{|}~-]++@'
. $hostnameLabel . '(?:\.' . $hostnameLabel . ')*';
if (strpos($Excerpt['text'], '>') !== false
and preg_match("/^<((mailto:)?$commonMarkEmail)>/i", $Excerpt['text'], $matches)
){
2014-12-15 01:52:03 +03:00
$url = $matches[1];
if ( ! isset($matches[2]))
{
$url = 'mailto:' . $url;
}
2014-04-17 11:59:35 +04:00
return array(
'extent' => strlen($matches[0]),
'element' => array(
'name' => 'a',
'text' => $matches[1],
'attributes' => array(
2014-12-15 01:52:03 +03:00
'href' => $url,
2014-04-17 11:59:35 +04:00
),
),
);
}
}
protected function inlineEmphasis($Excerpt)
2014-04-17 11:59:35 +04:00
{
if ( ! isset($Excerpt['text'][1]))
{
2014-09-22 03:36:42 +04:00
return;
}
$marker = $Excerpt['text'][0];
2015-01-16 04:18:07 +03:00
if ($Excerpt['text'][1] === $marker and preg_match($this->StrongRegex[$marker], $Excerpt['text'], $matches))
2015-01-16 02:24:02 +03:00
{
2015-01-16 04:18:07 +03:00
$emphasis = 'strong';
2015-01-16 02:24:02 +03:00
}
elseif (preg_match($this->EmRegex[$marker], $Excerpt['text'], $matches))
2014-04-17 11:59:35 +04:00
{
2015-01-16 04:18:07 +03:00
$emphasis = 'em';
2015-01-16 02:44:35 +03:00
}
2015-01-16 04:18:07 +03:00
else
2015-01-16 02:44:35 +03:00
{
2015-01-16 04:18:07 +03:00
return;
2014-04-17 11:59:35 +04:00
}
2015-01-16 04:18:07 +03:00
return array(
'extent' => strlen($matches[0]),
'element' => array(
'name' => $emphasis,
'handler' => 'line',
'text' => $matches[1],
),
);
2014-04-17 11:59:35 +04:00
}
protected function inlineEscapeSequence($Excerpt)
2014-04-17 11:59:35 +04:00
{
if (isset($Excerpt['text'][1]) and in_array($Excerpt['text'][1], $this->specialCharacters))
2014-04-17 11:59:35 +04:00
{
return array(
'markup' => $Excerpt['text'][1],
2015-01-16 04:18:07 +03:00
'extent' => 2,
2014-04-17 11:59:35 +04:00
);
}
}
protected function inlineImage($Excerpt)
2014-12-15 02:07:29 +03:00
{
if ( ! isset($Excerpt['text'][1]) or $Excerpt['text'][1] !== '[')
2014-12-15 02:07:29 +03:00
{
return;
}
$Excerpt['text']= substr($Excerpt['text'], 1);
2014-12-15 02:07:29 +03:00
$Link = $this->inlineLink($Excerpt);
2014-12-15 02:07:29 +03:00
if ($Link === null)
2014-12-16 14:58:33 +03:00
{
return;
}
$Inline = array(
'extent' => $Link['extent'] + 1,
'element' => array(
'name' => 'img',
'attributes' => array(
'src' => $Link['element']['attributes']['href'],
'alt' => $Link['element']['text'],
),
),
);
2014-12-15 02:07:29 +03:00
$Inline['element']['attributes'] += $Link['element']['attributes'];
unset($Inline['element']['attributes']['href']);
2014-12-15 02:07:29 +03:00
return $Inline;
2014-12-15 02:07:29 +03:00
}
protected function inlineLink($Excerpt)
2014-04-17 11:59:35 +04:00
{
2014-12-15 02:07:29 +03:00
$Element = array(
'name' => 'a',
'handler' => 'line',
'nonNestables' => array('Url', 'Link'),
2014-12-15 02:07:29 +03:00
'text' => null,
'attributes' => array(
'href' => null,
'title' => null,
),
);
$extent = 0;
$remainder = $Excerpt['text'];
2014-12-15 02:07:29 +03:00
if (preg_match('/\[((?:[^][]++|(?R))*+)\]/', $remainder, $matches))
2014-04-17 11:59:35 +04:00
{
2014-12-15 02:07:29 +03:00
$Element['text'] = $matches[1];
2014-04-17 11:59:35 +04:00
$extent += strlen($matches[0]);
2014-01-20 00:49:43 +04:00
2014-12-15 02:07:29 +03:00
$remainder = substr($remainder, $extent);
}
else
{
return;
}
2014-01-20 00:49:43 +04:00
if (preg_match('/^[(]\s*+((?:[^ ()]++|[(][^ )]+[)])++)(?:[ ]+("[^"]*"|\'[^\']*\'))?\s*[)]/', $remainder, $matches))
2014-12-15 02:07:29 +03:00
{
$Element['attributes']['href'] = $matches[1];
2014-01-20 00:49:43 +04:00
2014-12-15 02:07:29 +03:00
if (isset($matches[2]))
2014-04-17 11:59:35 +04:00
{
2014-12-15 02:07:29 +03:00
$Element['attributes']['title'] = substr($matches[2], 1, - 1);
2014-04-17 11:59:35 +04:00
}
2014-12-15 02:07:29 +03:00
$extent += strlen($matches[0]);
}
else
{
if (preg_match('/^\s*\[(.*?)\]/', $remainder, $matches))
{
$definition = strlen($matches[1]) ? $matches[1] : $Element['text'];
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$definition = strtolower($definition);
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$extent += strlen($matches[0]);
}
else
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{
$definition = strtolower($Element['text']);
}
if ( ! isset($this->DefinitionData['Reference'][$definition]))
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{
return;
}
$Definition = $this->DefinitionData['Reference'][$definition];
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$Element['attributes']['href'] = $Definition['url'];
$Element['attributes']['title'] = $Definition['title'];
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}
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return array(
'extent' => $extent,
'element' => $Element,
);
}
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protected function inlineMarkup($Excerpt)
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{
if ($this->markupEscaped or $this->safeMode or strpos($Excerpt['text'], '>') === false)
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{
return;
}
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if ($Excerpt['text'][1] === '/' and preg_match('/^<\/\w[\w-]*[ ]*>/s', $Excerpt['text'], $matches))
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{
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return array(
'markup' => $matches[0],
'extent' => strlen($matches[0]),
);
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}
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if ($Excerpt['text'][1] === '!' and preg_match('/^<!---?[^>-](?:-?[^-])*-->/s', $Excerpt['text'], $matches))
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{
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return array(
'markup' => $matches[0],
'extent' => strlen($matches[0]),
);
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}
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if ($Excerpt['text'][1] !== ' ' and preg_match('/^<\w[\w-]*(?:[ ]*'.$this->regexHtmlAttribute.')*[ ]*\/?>/s', $Excerpt['text'], $matches))
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{
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return array(
'markup' => $matches[0],
'extent' => strlen($matches[0]),
);
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}
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}
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protected function inlineSpecialCharacter($Excerpt)
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{
if ($Excerpt['text'][0] === '&' and ! preg_match('/^&#?\w+;/', $Excerpt['text']))
{
return array(
'markup' => '&amp;',
'extent' => 1,
);
}
$SpecialCharacter = array('>' => 'gt', '<' => 'lt', '"' => 'quot');
if (isset($SpecialCharacter[$Excerpt['text'][0]]))
{
return array(
'markup' => '&'.$SpecialCharacter[$Excerpt['text'][0]].';',
'extent' => 1,
);
}
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}
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protected function inlineStrikethrough($Excerpt)
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{
if ( ! isset($Excerpt['text'][1]))
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{
return;
}
if ($Excerpt['text'][1] === '~' and preg_match('/^~~(?=\S)(.+?)(?<=\S)~~/', $Excerpt['text'], $matches))
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{
return array(
'extent' => strlen($matches[0]),
'element' => array(
'name' => 'del',
'text' => $matches[1],
'handler' => 'line',
),
);
}
}
protected function inlineUrl($Excerpt)
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{
if ($this->urlsLinked !== true or ! isset($Excerpt['text'][2]) or $Excerpt['text'][2] !== '/')
{
return;
}
if (preg_match('/\bhttps?:[\/]{2}[^\s<]+\b\/*/ui', $Excerpt['context'], $matches, PREG_OFFSET_CAPTURE))
{
$url = $matches[0][0];
$Inline = array(
'extent' => strlen($matches[0][0]),
'position' => $matches[0][1],
'element' => array(
'name' => 'a',
'text' => $url,
'attributes' => array(
'href' => $url,
),
),
);
return $Inline;
}
}
protected function inlineUrlTag($Excerpt)
{
if (strpos($Excerpt['text'], '>') !== false and preg_match('/^<(\w+:\/{2}[^ >]+)>/i', $Excerpt['text'], $matches))
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{
$url = $matches[1];
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return array(
'extent' => strlen($matches[0]),
'element' => array(
'name' => 'a',
'text' => $url,
'attributes' => array(
'href' => $url,
),
),
);
}
}
# ~
protected function unmarkedText($text)
{
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if ($this->breaksEnabled)
{
$text = preg_replace('/[ ]*\n/', "<br />\n", $text);
}
else
{
$text = preg_replace('/(?:[ ][ ]+|[ ]*\\\\)\n/', "<br />\n", $text);
$text = str_replace(" \n", "\n", $text);
}
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return $text;
}
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#
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# Handlers
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#
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protected function element(array $Element)
{
if ($this->safeMode)
{
$Element = $this->sanitiseElement($Element);
}
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$hasName = isset($Element['name']);
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$markup = '';
if ($hasName)
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{
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$markup .= '<'.$Element['name'];
if (isset($Element['attributes']))
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{
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foreach ($Element['attributes'] as $name => $value)
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{
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if ($value === null)
{
continue;
}
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$markup .= ' '.$name.'="'.self::escape($value).'"';
}
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}
}
$unsafeHtml = false;
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if (isset($Element['text']))
{
$text = $Element['text'];
}
// very strongly consider an alternative if you're writing an
// extension
elseif (isset($Element['unsafeHtml']) and !$this->safeMode)
{
$text = $Element['unsafeHtml'];
$unsafeHtml = true;
}
if (isset($text))
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{
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$markup .= $hasName ? '>' : '';
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if (!isset($Element['nonNestables']))
{
$Element['nonNestables'] = array();
}
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if (isset($Element['handler']))
{
$markup .= $this->{$Element['handler']}($text, $Element['nonNestables']);
}
elseif ($unsafeHtml !== true or $this->safeMode)
{
$markup .= self::escape($text, true);
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}
else
{
$markup .= $text;
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}
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$markup .= $hasName ? '</'.$Element['name'].'>' : '';
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}
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elseif ($hasName)
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{
$markup .= ' />';
}
return $markup;
}
protected function elements(array $Elements)
{
$markup = '';
foreach ($Elements as $Element)
{
$markup .= "\n" . $this->element($Element);
}
$markup .= "\n";
return $markup;
}
# ~
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protected function li($lines)
{
$markup = $this->lines($lines);
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$trimmedMarkup = trim($markup);
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if ( ! in_array('', $lines) and substr($trimmedMarkup, 0, 3) === '<p>')
{
$markup = $trimmedMarkup;
$markup = substr($markup, 3);
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$position = strpos($markup, "</p>");
$markup = substr_replace($markup, '', $position, 4);
}
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return $markup;
}
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#
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# Deprecated Methods
#
function parse($text)
{
$markup = $this->text($text);
return $markup;
}
protected function sanitiseElement(array $Element)
{
static $goodAttribute = '/^[a-zA-Z0-9][a-zA-Z0-9-_]*+$/';
static $safeUrlNameToAtt = array(
'a' => 'href',
'img' => 'src',
);
if (isset($safeUrlNameToAtt[$Element['name']]))
{
$Element = $this->filterUnsafeUrlInAttribute($Element, $safeUrlNameToAtt[$Element['name']]);
}
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if ( ! empty($Element['attributes']))
{
foreach ($Element['attributes'] as $att => $val)
{
# filter out badly parsed attribute
if ( ! preg_match($goodAttribute, $att))
{
unset($Element['attributes'][$att]);
}
# dump onevent attribute
elseif (self::striAtStart($att, 'on'))
{
unset($Element['attributes'][$att]);
}
}
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}
return $Element;
}
protected function filterUnsafeUrlInAttribute(array $Element, $attribute)
{
foreach ($this->safeLinksWhitelist as $scheme)
{
if (self::striAtStart($Element['attributes'][$attribute], $scheme))
{
return $Element;
}
}
$Element['attributes'][$attribute] = str_replace(':', '%3A', $Element['attributes'][$attribute]);
return $Element;
}
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#
# Static Methods
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#
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protected static function escape($text, $allowQuotes = false)
{
return htmlspecialchars($text, $allowQuotes ? ENT_NOQUOTES : ENT_QUOTES, 'UTF-8');
}
protected static function striAtStart($string, $needle)
{
$len = strlen($needle);
if ($len > strlen($string))
{
return false;
}
else
{
return strtolower(substr($string, 0, $len)) === strtolower($needle);
}
}
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static function instance($name = 'default')
{
if (isset(self::$instances[$name]))
{
return self::$instances[$name];
}
$instance = new static();
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self::$instances[$name] = $instance;
return $instance;
}
private static $instances = array();
#
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# Fields
#
protected $DefinitionData;
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#
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# Read-Only
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protected $specialCharacters = array(
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'\\', '`', '*', '_', '{', '}', '[', ']', '(', ')', '>', '#', '+', '-', '.', '!', '|',
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);
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protected $StrongRegex = array(
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'*' => '/^[*]{2}((?:\\\\\*|[^*]|[*][^*]*[*])+?)[*]{2}(?![*])/s',
'_' => '/^__((?:\\\\_|[^_]|_[^_]*_)+?)__(?!_)/us',
);
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protected $EmRegex = array(
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'*' => '/^[*]((?:\\\\\*|[^*]|[*][*][^*]+?[*][*])+?)[*](?![*])/s',
'_' => '/^_((?:\\\\_|[^_]|__[^_]*__)+?)_(?!_)\b/us',
);
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protected $regexHtmlAttribute = '[a-zA-Z_:][\w:.-]*(?:\s*=\s*(?:[^"\'=<>`\s]+|"[^"]*"|\'[^\']*\'))?';
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protected $voidElements = array(
'area', 'base', 'br', 'col', 'command', 'embed', 'hr', 'img', 'input', 'link', 'meta', 'param', 'source',
);
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protected $textLevelElements = array(
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'a', 'br', 'bdo', 'abbr', 'blink', 'nextid', 'acronym', 'basefont',
'b', 'em', 'big', 'cite', 'small', 'spacer', 'listing',
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'i', 'rp', 'del', 'code', 'strike', 'marquee',
'q', 'rt', 'ins', 'font', 'strong',
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's', 'tt', 'kbd', 'mark',
'u', 'xm', 'sub', 'nobr',
'sup', 'ruby',
'var', 'span',
'wbr', 'time',
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);
}