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<?php | |
# | |
# | |
# Parsedown | |
# http://parsedown.org | |
# | |
# (c) Emanuil Rusev | |
# http://erusev.com | |
# | |
# For the full license information, view the LICENSE file that was distributed | |
# with this source code. | |
# | |
# | |
class Parsedown | |
{ | |
# ~ | |
const version = '1.7.4'; | |
# ~ | |
function text($text) | |
{ | |
# make sure no definitions are set | |
$this->DefinitionData = array(); | |
# standardize line breaks | |
$text = str_replace(array("\r\n", "\r"), "\n", $text); | |
# remove surrounding line breaks | |
$text = trim($text, "\n"); | |
# split text into lines | |
$lines = explode("\n", $text); | |
# iterate through lines to identify blocks | |
$markup = $this->lines($lines); | |
# trim line breaks | |
$markup = trim($markup, "\n"); | |
return $markup; | |
} | |
# | |
# Setters | |
# | |
function setBreaksEnabled($breaksEnabled) | |
{ | |
$this->breaksEnabled = $breaksEnabled; | |
return $this; | |
} | |
protected $breaksEnabled; | |
function setMarkupEscaped($markupEscaped) | |
{ | |
$this->markupEscaped = $markupEscaped; | |
return $this; | |
} | |
protected $markupEscaped; | |
function setUrlsLinked($urlsLinked) | |
{ | |
$this->urlsLinked = $urlsLinked; | |
return $this; | |
} | |
protected $urlsLinked = true; | |
function setSafeMode($safeMode) | |
{ | |
$this->safeMode = (bool) $safeMode; | |
return $this; | |
} | |
protected $safeMode; | |
protected $safeLinksWhitelist = array( | |
'http://', | |
'https://', | |
'ftp://', | |
'ftps://', | |
'mailto:', | |
'data:image/png;base64,', | |
'data:image/gif;base64,', | |
'data:image/jpeg;base64,', | |
'irc:', | |
'ircs:', | |
'git:', | |
'ssh:', | |
'news:', | |
'steam:', | |
); | |
# | |
# Lines | |
# | |
protected $BlockTypes = array( | |
'#' => array('Header'), | |
'*' => array('Rule', 'List'), | |
'+' => array('List'), | |
'-' => array('SetextHeader', 'Table', 'Rule', 'List'), | |
'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'), | |
':' => array('Table'), | |
'<' => array('Comment', 'Markup'), | |
'=' => array('SetextHeader'), | |
'>' => array('Quote'), | |
'[' => array('Reference'), | |
'_' => array('Rule'), | |
'`' => array('FencedCode'), | |
'|' => array('Table'), | |
'~' => array('FencedCode'), | |
); | |
# ~ | |
protected $unmarkedBlockTypes = array( | |
'Code', | |
); | |
# | |
# Blocks | |
# | |
protected function lines(array $lines) | |
{ | |
$CurrentBlock = null; | |
foreach ($lines as $line) | |
{ | |
if (chop($line) === '') | |
{ | |
if (isset($CurrentBlock)) | |
{ | |
$CurrentBlock['interrupted'] = true; | |
} | |
continue; | |
} | |
if (strpos($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; | |
} | |
} | |
$indent = 0; | |
while (isset($line[$indent]) and $line[$indent] === ' ') | |
{ | |
$indent ++; | |
} | |
$text = $indent > 0 ? substr($line, $indent) : $line; | |
# ~ | |
$Line = array('body' => $line, 'indent' => $indent, 'text' => $text); | |
# ~ | |
if (isset($CurrentBlock['continuable'])) | |
{ | |
$Block = $this->{'block'.$CurrentBlock['type'].'Continue'}($Line, $CurrentBlock); | |
if (isset($Block)) | |
{ | |
$CurrentBlock = $Block; | |
continue; | |
} | |
else | |
{ | |
if ($this->isBlockCompletable($CurrentBlock['type'])) | |
{ | |
$CurrentBlock = $this->{'block'.$CurrentBlock['type'].'Complete'}($CurrentBlock); | |
} | |
} | |
} | |
# ~ | |
$marker = $text[0]; | |
# ~ | |
$blockTypes = $this->unmarkedBlockTypes; | |
if (isset($this->BlockTypes[$marker])) | |
{ | |
foreach ($this->BlockTypes[$marker] as $blockType) | |
{ | |
$blockTypes []= $blockType; | |
} | |
} | |
# | |
# ~ | |
foreach ($blockTypes as $blockType) | |
{ | |
$Block = $this->{'block'.$blockType}($Line, $CurrentBlock); | |
if (isset($Block)) | |
{ | |
$Block['type'] = $blockType; | |
if ( ! isset($Block['identified'])) | |
{ | |
$Blocks []= $CurrentBlock; | |
$Block['identified'] = true; | |
} | |
if ($this->isBlockContinuable($blockType)) | |
{ | |
$Block['continuable'] = true; | |
} | |
$CurrentBlock = $Block; | |
continue 2; | |
} | |
} | |
# ~ | |
if (isset($CurrentBlock) and ! isset($CurrentBlock['type']) and ! isset($CurrentBlock['interrupted'])) | |
{ | |
$CurrentBlock['element']['text'] .= "\n".$text; | |
} | |
else | |
{ | |
$Blocks []= $CurrentBlock; | |
$CurrentBlock = $this->paragraph($Line); | |
$CurrentBlock['identified'] = true; | |
} | |
} | |
# ~ | |
if (isset($CurrentBlock['continuable']) and $this->isBlockCompletable($CurrentBlock['type'])) | |
{ | |
$CurrentBlock = $this->{'block'.$CurrentBlock['type'].'Complete'}($CurrentBlock); | |
} | |
# ~ | |
$Blocks []= $CurrentBlock; | |
unset($Blocks[0]); | |
# ~ | |
$markup = ''; | |
foreach ($Blocks as $Block) | |
{ | |
if (isset($Block['hidden'])) | |
{ | |
continue; | |
} | |
$markup .= "\n"; | |
$markup .= isset($Block['markup']) ? $Block['markup'] : $this->element($Block['element']); | |
} | |
$markup .= "\n"; | |
# ~ | |
return $markup; | |
} | |
protected function isBlockContinuable($Type) | |
{ | |
return method_exists($this, 'block'.$Type.'Continue'); | |
} | |
protected function isBlockCompletable($Type) | |
{ | |
return method_exists($this, 'block'.$Type.'Complete'); | |
} | |
# | |
# Code | |
protected function blockCode($Line, $Block = null) | |
{ | |
if (isset($Block) and ! isset($Block['type']) and ! isset($Block['interrupted'])) | |
{ | |
return; | |
} | |
if ($Line['indent'] >= 4) | |
{ | |
$text = substr($Line['body'], 4); | |
$Block = array( | |
'element' => array( | |
'name' => 'pre', | |
'handler' => 'element', | |
'text' => array( | |
'name' => 'code', | |
'text' => $text, | |
), | |
), | |
); | |
return $Block; | |
} | |
} | |
protected function blockCodeContinue($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); | |
$Block['element']['text']['text'] .= $text; | |
return $Block; | |
} | |
} | |
protected function blockCodeComplete($Block) | |
{ | |
$text = $Block['element']['text']['text']; | |
$Block['element']['text']['text'] = $text; | |
return $Block; | |
} | |
# | |
# Comment | |
protected function blockComment($Line) | |
{ | |
if ($this->markupEscaped or $this->safeMode) | |
{ | |
return; | |
} | |
if (isset($Line['text'][3]) and $Line['text'][3] === '-' and $Line['text'][2] === '-' and $Line['text'][1] === '!') | |
{ | |
$Block = array( | |
'markup' => $Line['body'], | |
); | |
if (preg_match('/-->$/', $Line['text'])) | |
{ | |
$Block['closed'] = true; | |
} | |
return $Block; | |
} | |
} | |
protected function blockCommentContinue($Line, array $Block) | |
{ | |
if (isset($Block['closed'])) | |
{ | |
return; | |
} | |
$Block['markup'] .= "\n" . $Line['body']; | |
if (preg_match('/-->$/', $Line['text'])) | |
{ | |
$Block['closed'] = true; | |
} | |
return $Block; | |
} | |
# | |
# Fenced Code | |
protected function blockFencedCode($Line) | |
{ | |
if (preg_match('/^['.$Line['text'][0].']{3,}[ ]*([^`]+)?[ ]*$/', $Line['text'], $matches)) | |
{ | |
$Element = array( | |
'name' => 'code', | |
'text' => '', | |
); | |
if (isset($matches[1])) | |
{ | |
/** | |
* https://www.w3.org/TR/2011/WD-html5-20110525/elements.html#classes | |
* Every HTML element may have a class attribute specified. | |
* The attribute, if specified, must have a value that is a set | |
* of space-separated tokens representing the various classes | |
* that the element belongs to. | |
* [...] | |
* The space characters, for the purposes of this specification, | |
* are U+0020 SPACE, U+0009 CHARACTER TABULATION (tab), | |
* U+000A LINE FEED (LF), U+000C FORM FEED (FF), and | |
* U+000D CARRIAGE RETURN (CR). | |
*/ | |
$language = substr($matches[1], 0, strcspn($matches[1], " \t\n\f\r")); | |
$class = 'language-'.$language; | |
$Element['attributes'] = array( | |
'class' => $class, | |
); | |
} | |
$Block = array( | |
'char' => $Line['text'][0], | |
'element' => array( | |
'name' => 'pre', | |
'handler' => 'element', | |
'text' => $Element, | |
'attributes' => array( | |
'class' => 'code', | |
'data-lang' => $language | |
), | |
), | |
); | |
return $Block; | |
} | |
} | |
protected function blockFencedCodeContinue($Line, $Block) | |
{ | |
if (isset($Block['complete'])) | |
{ | |
return; | |
} | |
if (isset($Block['interrupted'])) | |
{ | |
$Block['element']['text']['text'] .= "\n"; | |
unset($Block['interrupted']); | |
} | |
if (preg_match('/^'.$Block['char'].'{3,}[ ]*$/', $Line['text'])) | |
{ | |
$Block['element']['text']['text'] = substr($Block['element']['text']['text'], 1); | |
$Block['complete'] = true; | |
return $Block; | |
} | |
$Block['element']['text']['text'] .= "\n".$Line['body']; | |
return $Block; | |
} | |
protected function blockFencedCodeComplete($Block) | |
{ | |
$text = $Block['element']['text']['text']; | |
$Block['element']['text']['text'] = $text; | |
return $Block; | |
} | |
# | |
# Header | |
protected function blockHeader($Line) | |
{ | |
if (isset($Line['text'][1])) | |
{ | |
$level = 1; | |
while (isset($Line['text'][$level]) and $Line['text'][$level] === '#') | |
{ | |
$level ++; | |
} | |
if ($level > 6) | |
{ | |
return; | |
} | |
$text = trim($Line['text'], '# '); | |
$Block = array( | |
'element' => array( | |
'name' => 'h' . min(6, $level), | |
'text' => $text, | |
'handler' => 'line', | |
), | |
); | |
return $Block; | |
} | |
} | |
# | |
# List | |
protected function blockList($Line) | |
{ | |
list($name, $pattern) = $Line['text'][0] <= '-' ? array('ul', '[*+-]') : array('ol', '[0-9]+[.]'); | |
if (preg_match('/^('.$pattern.'[ ]+)(.*)/', $Line['text'], $matches)) | |
{ | |
$Block = array( | |
'indent' => $Line['indent'], | |
'pattern' => $pattern, | |
'element' => array( | |
'name' => $name, | |
'handler' => 'elements', | |
), | |
); | |
if($name === 'ol') | |
{ | |
$listStart = stristr($matches[0], '.', true); | |
if($listStart !== '1') | |
{ | |
$Block['element']['attributes'] = array('start' => $listStart); | |
} | |
} | |
$Block['li'] = array( | |
'name' => 'li', | |
'handler' => 'li', | |
'text' => array( | |
$matches[2], | |
), | |
); | |
$Block['element']['text'] []= & $Block['li']; | |
return $Block; | |
} | |
} | |
protected function blockListContinue($Line, array $Block) | |
{ | |
if ($Block['indent'] === $Line['indent'] and preg_match('/^'.$Block['pattern'].'(?:[ ]+(.*)|$)/', $Line['text'], $matches)) | |
{ | |
if (isset($Block['interrupted'])) | |
{ | |
$Block['li']['text'] []= ''; | |
$Block['loose'] = true; | |
unset($Block['interrupted']); | |
} | |
unset($Block['li']); | |
$text = isset($matches[1]) ? $matches[1] : ''; | |
$Block['li'] = array( | |
'name' => 'li', | |
'handler' => 'li', | |
'text' => array( | |
$text, | |
), | |
); | |
$Block['element']['text'] []= & $Block['li']; | |
return $Block; | |
} | |
if ($Line['text'][0] === '[' and $this->blockReference($Line)) | |
{ | |
return $Block; | |
} | |
if ( ! isset($Block['interrupted'])) | |
{ | |
$text = preg_replace('/^[ ]{0,4}/', '', $Line['body']); | |
$Block['li']['text'] []= $text; | |
return $Block; | |
} | |
if ($Line['indent'] > 0) | |
{ | |
$Block['li']['text'] []= ''; | |
$text = preg_replace('/^[ ]{0,4}/', '', $Line['body']); | |
$Block['li']['text'] []= $text; | |
unset($Block['interrupted']); | |
return $Block; | |
} | |
} | |
protected function blockListComplete(array $Block) | |
{ | |
if (isset($Block['loose'])) | |
{ | |
foreach ($Block['element']['text'] as &$li) | |
{ | |
if (end($li['text']) !== '') | |
{ | |
$li['text'] []= ''; | |
} | |
} | |
} | |
return $Block; | |
} | |
# | |
# Quote | |
protected function blockQuote($Line) | |
{ | |
if (preg_match('/^>[ ]?(.*)/', $Line['text'], $matches)) | |
{ | |
$Block = array( | |
'element' => array( | |
'name' => 'blockquote', | |
'handler' => 'lines', | |
'text' => (array) $matches[1], | |
), | |
); | |
return $Block; | |
} | |
} | |
protected function blockQuoteContinue($Line, array $Block) | |
{ | |
if ($Line['text'][0] === '>' and preg_match('/^>[ ]?(.*)/', $Line['text'], $matches)) | |
{ | |
if (isset($Block['interrupted'])) | |
{ | |
$Block['element']['text'] []= ''; | |
unset($Block['interrupted']); | |
} | |
$Block['element']['text'] []= $matches[1]; | |
return $Block; | |
} | |
if ( ! isset($Block['interrupted'])) | |
{ | |
$Block['element']['text'] []= $Line['text']; | |
return $Block; | |
} | |
} | |
# | |
# Rule | |
protected function blockRule($Line) | |
{ | |
if (preg_match('/^(['.$Line['text'][0].'])([ ]*\1){2,}[ ]*$/', $Line['text'])) | |
{ | |
$Block = array( | |
'element' => array( | |
'name' => 'hr' | |
), | |
); | |
return $Block; | |
} | |
} | |
# | |
# Setext | |
protected function blockSetextHeader($Line, array $Block = null) | |
{ | |
if ( ! isset($Block) or isset($Block['type']) or isset($Block['interrupted'])) | |
{ | |
return; | |
} | |
if (chop($Line['text'], $Line['text'][0]) === '') | |
{ | |
$Block['element']['name'] = $Line['text'][0] === '=' ? 'h1' : 'h2'; | |
return $Block; | |
} | |
} | |
# | |
# Markup | |
protected function blockMarkup($Line) | |
{ | |
if ($this->markupEscaped or $this->safeMode) | |
{ | |
return; | |
} | |
if (preg_match('/^<(\w[\w-]*)(?:[ ]*'.$this->regexHtmlAttribute.')*[ ]*(\/)?>/', $Line['text'], $matches)) | |
{ | |
$element = strtolower($matches[1]); | |
if (in_array($element, $this->textLevelElements)) | |
{ | |
return; | |
} | |
$Block = array( | |
'name' => $matches[1], | |
'depth' => 0, | |
'markup' => $Line['text'], | |
); | |
$length = strlen($matches[0]); | |
$remainder = substr($Line['text'], $length); | |
if (trim($remainder) === '') | |
{ | |
if (isset($matches[2]) or in_array($matches[1], $this->voidElements)) | |
{ | |
$Block['closed'] = true; | |
$Block['void'] = true; | |
} | |
} | |
else | |
{ | |
if (isset($matches[2]) or in_array($matches[1], $this->voidElements)) | |
{ | |
return; | |
} | |
if (preg_match('/<\/'.$matches[1].'>[ ]*$/i', $remainder)) | |
{ | |
$Block['closed'] = true; | |
} | |
} | |
return $Block; | |
} | |
} | |
protected function blockMarkupContinue($Line, array $Block) | |
{ | |
if (isset($Block['closed'])) | |
{ | |
return; | |
} | |
if (preg_match('/^<'.$Block['name'].'(?:[ ]*'.$this->regexHtmlAttribute.')*[ ]*>/i', $Line['text'])) # open | |
{ | |
$Block['depth'] ++; | |
} | |
if (preg_match('/(.*?)<\/'.$Block['name'].'>[ ]*$/i', $Line['text'], $matches)) # close | |
{ | |
if ($Block['depth'] > 0) | |
{ | |
$Block['depth'] --; | |
} | |
else | |
{ | |
$Block['closed'] = true; | |
} | |
} | |
if (isset($Block['interrupted'])) | |
{ | |
$Block['markup'] .= "\n"; | |
unset($Block['interrupted']); | |
} | |
$Block['markup'] .= "\n".$Line['body']; | |
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 $Block; | |
} | |
} | |
# | |
# Table | |
protected function blockTable($Line, array $Block = null) | |
{ | |
if ( ! isset($Block) or isset($Block['type']) or isset($Block['interrupted'])) | |
{ | |
return; | |
} | |
if (strpos($Block['element']['text'], '|') !== false and chop($Line['text'], ' -:|') === '') | |
{ | |
$alignments = array(); | |
$divider = $Line['text']; | |
$divider = trim($divider); | |
$divider = trim($divider, '|'); | |
$dividerCells = explode('|', $divider); | |
foreach ($dividerCells as $dividerCell) | |
{ | |
$dividerCell = trim($dividerCell); | |
if ($dividerCell === '') | |
{ | |
continue; | |
} | |
$alignment = null; | |
if ($dividerCell[0] === ':') | |
{ | |
$alignment = 'left'; | |
} | |
if (substr($dividerCell, - 1) === ':') | |
{ | |
$alignment = $alignment === 'left' ? 'center' : 'right'; | |
} | |
$alignments []= $alignment; | |
} | |
# ~ | |
$HeaderElements = array(); | |
$header = $Block['element']['text']; | |
$header = trim($header); | |
$header = trim($header, '|'); | |
$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]; | |
$HeaderElement['attributes'] = array( | |
'style' => 'text-align: '.$alignment.';', | |
); | |
} | |
$HeaderElements []= $HeaderElement; | |
} | |
# ~ | |
$Block = array( | |
'alignments' => $alignments, | |
'identified' => true, | |
'element' => array( | |
'name' => 'table', | |
'handler' => 'elements', | |
'attributes' => array( | |
'class' => 'table mb-3 table-scroll table-striped' | |
), | |
), | |
); | |
$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 $Block; | |
} | |
} | |
protected function blockTableContinue($Line, array $Block) | |
{ | |
if (isset($Block['interrupted'])) | |
{ | |
return; | |
} | |
if ($Line['text'][0] === '|' or strpos($Line['text'], '|')) | |
{ | |
$Elements = array(); | |
$row = $Line['text']; | |
$row = trim($row); | |
$row = trim($row, '|'); | |
preg_match_all('/(?:(\\\\[|])|[^|`]|`[^`]+`|`)+/', $row, $matches); | |
foreach ($matches[0] as $index => $cell) | |
{ | |
$cell = trim($cell); | |
$Element = array( | |
'name' => 'td', | |
'handler' => 'line', | |
'text' => $cell, | |
); | |
if (isset($Block['alignments'][$index])) | |
{ | |
$Element['attributes'] = array( | |
'style' => 'text-align: '.$Block['alignments'][$index].';', | |
); | |
} | |
$Elements []= $Element; | |
} | |
$Element = array( | |
'name' => 'tr', | |
'handler' => 'elements', | |
'text' => $Elements, | |
); | |
$Block['element']['text'][1]['text'] []= $Element; | |
return $Block; | |
} | |
} | |
# | |
# ~ | |
# | |
protected function paragraph($Line) | |
{ | |
$Block = array( | |
'element' => array( | |
'name' => 'p', | |
'text' => $Line['text'], | |
'handler' => 'line', | |
), | |
); | |
return $Block; | |
} | |
# | |
# Inline Elements | |
# | |
protected $InlineTypes = array( | |
'"' => array('SpecialCharacter'), | |
'!' => array('Image'), | |
'&' => array('SpecialCharacter'), | |
'*' => array('Emphasis'), | |
':' => array('Url'), | |
'<' => array('UrlTag', 'EmailTag', 'Markup', 'SpecialCharacter'), | |
'>' => array('SpecialCharacter'), | |
'[' => array('Link'), | |
'_' => array('Emphasis'), | |
'`' => array('Code'), | |
'~' => array('Strikethrough'), | |
'\\' => array('EscapeSequence'), | |
); | |
# ~ | |
protected $inlineMarkerList = '!"*_&[:<>`~\\'; | |
# | |
# ~ | |
# | |
public function line($text, $nonNestables=array()) | |
{ | |
$markup = ''; | |
# $excerpt is based on the first occurrence of a marker | |
while ($excerpt = strpbrk($text, $this->inlineMarkerList)) | |
{ | |
$marker = $excerpt[0]; | |
$markerPosition = strpos($text, $marker); | |
$Excerpt = array('text' => $excerpt, 'context' => $text); | |
foreach ($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}($Excerpt); | |
if ( ! isset($Inline)) | |
{ | |
continue; | |
} | |
# makes sure that the inline belongs to "our" marker | |
if (isset($Inline['position']) and $Inline['position'] > $markerPosition) | |
{ | |
continue; | |
} | |
# sets a default inline position | |
if ( ! isset($Inline['position'])) | |
{ | |
$Inline['position'] = $markerPosition; | |
} | |
# cause the new element to 'inherit' our non nestables | |
foreach ($nonNestables as $non_nestable) | |
{ | |
$Inline['element']['nonNestables'][] = $non_nestable; | |
} | |
# the text that comes before the inline | |
$unmarkedText = substr($text, 0, $Inline['position']); | |
# compile the unmarked text | |
$markup .= $this->unmarkedText($unmarkedText); | |
# compile the inline | |
$markup .= isset($Inline['markup']) ? $Inline['markup'] : $this->element($Inline['element']); | |
# remove the examined text | |
$text = substr($text, $Inline['position'] + $Inline['extent']); | |
continue 2; | |
} | |
# the marker does not belong to an inline | |
$unmarkedText = substr($text, 0, $markerPosition + 1); | |
$markup .= $this->unmarkedText($unmarkedText); | |
$text = substr($text, $markerPosition + 1); | |
} | |
$markup .= $this->unmarkedText($text); | |
return $markup; | |
} | |
# | |
# ~ | |
# | |
protected function inlineCode($Excerpt) | |
{ | |
$marker = $Excerpt['text'][0]; | |
if (preg_match('/^('.$marker.'+)[ ]*(.+?)[ ]*(?<!'.$marker.')\1(?!'.$marker.')/s', $Excerpt['text'], $matches)) | |
{ | |
$text = $matches[2]; | |
$text = preg_replace("/[ ]*\n/", ' ', $text); | |
return array( | |
'extent' => strlen($matches[0]), | |
'element' => array( | |
'name' => 'code', | |
'text' => $text, | |
), | |
); | |
} | |
} | |
protected function inlineEmailTag($Excerpt) | |
{ | |
if (strpos($Excerpt['text'], '>') !== false and preg_match('/^<((mailto:)?\S+?@\S+?)>/i', $Excerpt['text'], $matches)) | |
{ | |
$url = $matches[1]; | |
if ( ! isset($matches[2])) | |
{ | |
$url = 'mailto:' . $url; | |
} | |
return array( | |
'extent' => strlen($matches[0]), | |
'element' => array( | |
'name' => 'a', | |
'text' => $matches[1], | |
'attributes' => array( | |
'href' => $url, | |
), | |
), | |
); | |
} | |
} | |
protected function inlineEmphasis($Excerpt) | |
{ | |
if ( ! isset($Excerpt['text'][1])) | |
{ | |
return; | |
} | |
$marker = $Excerpt['text'][0]; | |
if ($Excerpt['text'][1] === $marker and preg_match($this->StrongRegex[$marker], $Excerpt['text'], $matches)) | |
{ | |
$emphasis = 'strong'; | |
} | |
elseif (preg_match($this->EmRegex[$marker], $Excerpt['text'], $matches)) | |
{ | |
$emphasis = 'em'; | |
} | |
else | |
{ | |
return; | |
} | |
return array( | |
'extent' => strlen($matches[0]), | |
'element' => array( | |
'name' => $emphasis, | |
'handler' => 'line', | |
'text' => $matches[1], | |
), | |
); | |
} | |
protected function inlineEscapeSequence($Excerpt) | |
{ | |
if (isset($Excerpt['text'][1]) and in_array($Excerpt['text'][1], $this->specialCharacters)) | |
{ | |
return array( | |
'markup' => $Excerpt['text'][1], | |
'extent' => 2, | |
); | |
} | |
} | |
protected function inlineImage($Excerpt) | |
{ | |
if ( ! isset($Excerpt['text'][1]) or $Excerpt['text'][1] !== '[') | |
{ | |
return; | |
} | |
$Excerpt['text']= substr($Excerpt['text'], 1); | |
$Link = $this->inlineLink($Excerpt); | |
if ($Link === null) | |
{ | |
return; | |
} | |
$Inline = array( | |
'extent' => $Link['extent'] + 1, | |
'element' => array( | |
'name' => 'img', | |
'attributes' => array( | |
'src' => $Link['element']['attributes']['href'], | |
'alt' => $Link['element']['text'], | |
), | |
), | |
); | |
$Inline['element']['attributes'] += $Link['element']['attributes']; | |
unset($Inline['element']['attributes']['href']); | |
return $Inline; | |
} | |
protected function inlineLink($Excerpt) | |
{ | |
$Element = array( | |
'name' => 'a', | |
'handler' => 'line', | |
'nonNestables' => array('Url', 'Link'), | |
'text' => null, | |
'attributes' => array( | |
'href' => null, | |
'title' => null, | |
), | |
); | |
$extent = 0; | |
$remainder = $Excerpt['text']; | |
if (preg_match('/\[((?:[^][]++|(?R))*+)\]/', $remainder, $matches)) | |
{ | |
$Element['text'] = $matches[1]; | |
$extent += strlen($matches[0]); | |
$remainder = substr($remainder, $extent); | |
} | |
else | |
{ | |
return; | |
} | |
if (preg_match('/^[(]\s*+((?:[^ ()]++|[(][^ )]+[)])++)(?:[ ]+("[^"]*"|\'[^\']*\'))?\s*[)]/', $remainder, $matches)) | |
{ | |
$Element['attributes']['href'] = $matches[1]; | |
if (isset($matches[2])) | |
{ | |
$Element['attributes']['title'] = substr($matches[2], 1, - 1); | |
} | |
$extent += strlen($matches[0]); | |
} | |
else | |
{ | |
if (preg_match('/^\s*\[(.*?)\]/', $remainder, $matches)) | |
{ | |
$definition = strlen($matches[1]) ? $matches[1] : $Element['text']; | |
$definition = strtolower($definition); | |
$extent += strlen($matches[0]); | |
} | |
else | |
{ | |
$definition = strtolower($Element['text']); | |
} | |
if ( ! isset($this->DefinitionData['Reference'][$definition])) | |
{ | |
return; | |
} | |
$Definition = $this->DefinitionData['Reference'][$definition]; | |
$Element['attributes']['href'] = $Definition['url']; | |
$Element['attributes']['title'] = $Definition['title']; | |
} | |
return array( | |
'extent' => $extent, | |
'element' => $Element, | |
); | |
} | |
protected function inlineMarkup($Excerpt) | |
{ | |
if ($this->markupEscaped or $this->safeMode or strpos($Excerpt['text'], '>') === false) | |
{ | |
return; | |
} | |
if ($Excerpt['text'][1] === '/' and preg_match('/^<\/\w[\w-]*[ ]*>/s', $Excerpt['text'], $matches)) | |
{ | |
return array( | |
'markup' => $matches[0], | |
'extent' => strlen($matches[0]), | |
); | |
} | |
if ($Excerpt['text'][1] === '!' and preg_match('/^<!---?[^>-](?:-?[^-])*-->/s', $Excerpt['text'], $matches)) | |
{ | |
return array( | |
'markup' => $matches[0], | |
'extent' => strlen($matches[0]), | |
); | |
} | |
if ($Excerpt['text'][1] !== ' ' and preg_match('/^<\w[\w-]*(?:[ ]*'.$this->regexHtmlAttribute.')*[ ]*\/?>/s', $Excerpt['text'], $matches)) | |
{ | |
return array( | |
'markup' => $matches[0], | |
'extent' => strlen($matches[0]), | |
); | |
} | |
} | |
protected function inlineSpecialCharacter($Excerpt) | |
{ | |
if ($Excerpt['text'][0] === '&' and ! preg_match('/^&#?\w+;/', $Excerpt['text'])) | |
{ | |
return array( | |
'markup' => '&', | |
'extent' => 1, | |
); | |
} | |
$SpecialCharacter = array('>' => 'gt', '<' => 'lt', '"' => 'quot'); | |
if (isset($SpecialCharacter[$Excerpt['text'][0]])) | |
{ | |
return array( | |
'markup' => '&'.$SpecialCharacter[$Excerpt['text'][0]].';', | |
'extent' => 1, | |
); | |
} | |
} | |
protected function inlineStrikethrough($Excerpt) | |
{ | |
if ( ! isset($Excerpt['text'][1])) | |
{ | |
return; | |
} | |
if ($Excerpt['text'][1] === '~' and preg_match('/^~~(?=\S)(.+?)(?<=\S)~~/', $Excerpt['text'], $matches)) | |
{ | |
return array( | |
'extent' => strlen($matches[0]), | |
'element' => array( | |
'name' => 'del', | |
'text' => $matches[1], | |
'handler' => 'line', | |
), | |
); | |
} | |
} | |
protected function inlineUrl($Excerpt) | |
{ | |
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)) | |
{ | |
$url = $matches[1]; | |
return array( | |
'extent' => strlen($matches[0]), | |
'element' => array( | |
'name' => 'a', | |
'text' => $url, | |
'attributes' => array( | |
'href' => $url, | |
), | |
), | |
); | |
} | |
} | |
# ~ | |
protected function unmarkedText($text) | |
{ | |
if ($this->breaksEnabled) | |
{ | |
$text = preg_replace('/[ ]*\n/', "<br />\n", $text); | |
} | |
else | |
{ | |
$text = preg_replace('/(?:[ ][ ]+|[ ]*\\\\)\n/', "<br />\n", $text); | |
$text = str_replace(" \n", "\n", $text); | |
} | |
return $text; | |
} | |
# | |
# Handlers | |
# | |
protected function element(array $Element) | |
{ | |
if ($this->safeMode) | |
{ | |
$Element = $this->sanitiseElement($Element); | |
} | |
$markup = '<'.$Element['name']; | |
if (isset($Element['attributes'])) | |
{ | |
foreach ($Element['attributes'] as $name => $value) | |
{ | |
if ($value === null) | |
{ | |
continue; | |
} | |
$markup .= ' '.$name.'="'.self::escape($value).'"'; | |
} | |
} | |
$permitRawHtml = false; | |
if (isset($Element['text'])) | |
{ | |
$text = $Element['text']; | |
} | |
// very strongly consider an alternative if you're writing an | |
// extension | |
elseif (isset($Element['rawHtml'])) | |
{ | |
$text = $Element['rawHtml']; | |
$allowRawHtmlInSafeMode = isset($Element['allowRawHtmlInSafeMode']) && $Element['allowRawHtmlInSafeMode']; | |
$permitRawHtml = !$this->safeMode || $allowRawHtmlInSafeMode; | |
} | |
if (isset($text)) | |
{ | |
$markup .= '>'; | |
if (!isset($Element['nonNestables'])) | |
{ | |
$Element['nonNestables'] = array(); | |
} | |
if (isset($Element['handler'])) | |
{ | |
$markup .= $this->{$Element['handler']}($text, $Element['nonNestables']); | |
} | |
elseif (!$permitRawHtml) | |
{ | |
$markup .= self::escape($text, true); | |
} | |
else | |
{ | |
$markup .= $text; | |
} | |
$markup .= '</'.$Element['name'].'>'; | |
} | |
else | |
{ | |
$markup .= ' />'; | |
} | |
return $markup; | |
} | |
protected function elements(array $Elements) | |
{ | |
$markup = ''; | |
foreach ($Elements as $Element) | |
{ | |
$markup .= "\n" . $this->element($Element); | |
} | |
$markup .= "\n"; | |
return $markup; | |
} | |
# ~ | |
protected function li($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 $markup; | |
} | |
# | |
# Deprecated Methods | |
# | |
function parse($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']]); | |
} | |
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]); | |
} | |
} | |
} | |
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 $Element; | |
} | |
# | |
# Static Methods | |
# | |
protected static function escape($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); | |
} | |
} | |
static function instance($name = 'default') | |
{ | |
if (isset(self::$instances[$name])) | |
{ | |
return self::$instances[$name]; | |
} | |
$instance = new static(); | |
self::$instances[$name] = $instance; | |
return $instance; | |
} | |
private static $instances = array(); | |
# | |
# Fields | |
# | |
protected $DefinitionData; | |
# | |
# Read-Only | |
protected $specialCharacters = array( | |
'\\', '`', '*', '_', '{', '}', '[', ']', '(', ')', '>', '#', '+', '-', '.', '!', '|', | |
); | |
protected $StrongRegex = array( | |
'*' => '/^[*]{2}((?:\\\\\*|[^*]|[*][^*]*[*])+?)[*]{2}(?![*])/s', | |
'_' => '/^__((?:\\\\_|[^_]|_[^_]*_)+?)__(?!_)/us', | |
); | |
protected $EmRegex = array( | |
'*' => '/^[*]((?:\\\\\*|[^*]|[*][*][^*]+?[*][*])+?)[*](?![*])/s', | |
'_' => '/^_((?:\\\\_|[^_]|__[^_]*__)+?)_(?!_)\b/us', | |
); | |
protected $regexHtmlAttribute = '[a-zA-Z_:][\w:.-]*(?:\s*=\s*(?:[^"\'=<>`\s]+|"[^"]*"|\'[^\']*\'))?'; | |
protected $voidElements = array( | |
'area', 'base', 'br', 'col', 'command', 'embed', 'hr', 'img', 'input', 'link', 'meta', 'param', 'source', | |
); | |
protected $textLevelElements = array( | |
'a', 'br', 'bdo', 'abbr', 'blink', 'nextid', 'acronym', 'basefont', | |
'b', 'em', 'big', 'cite', 'small', 'spacer', 'listing', | |
'i', 'rp', 'del', 'code', 'strike', 'marquee', | |
'q', 'rt', 'ins', 'font', 'strong', | |
's', 'tt', 'kbd', 'mark', | |
'u', 'xm', 'sub', 'nobr', | |
'sup', 'ruby', | |
'var', 'span', | |
'wbr', 'time', | |
); | |
} |
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