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ParsedownExtra.php
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ParsedownExtra.php
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<?php
#
#
# Parsedown Extra
# https://github.com/erusev/parsedown-extra
#
# (c) Emanuil Rusev
# http://erusev.com
#
# For the full license information, view the LICENSE file that was distributed
# with this source code.
#
#
class ParsedownExtra extends Parsedown
{
# ~
const version = '0.8.0-beta-1';
# ~
function __construct()
{
if (version_compare(parent::version, '1.7.1') < 0)
{
throw new Exception('ParsedownExtra requires a later version of Parsedown');
}
$this->BlockTypes['$'][] = 'Variable';
$this->InlineTypes['$'][] = 'GetVariable';
$this->inlineMarkerList .= '$';
$this->BlockTypes['-'][] = 'Section';
$this->BlockTypes['='][] = 'Figure';
$this->BlockTypes[':'] []= 'DefinitionList';
$this->BlockTypes['*'] []= 'Abbreviation';
# identify footnote definitions before reference definitions
array_unshift($this->BlockTypes['['], 'Footnote');
# identify footnote markers before before links
array_unshift($this->InlineTypes['['], 'FootnoteMarker');
}
#
# ~
function text($text)
{
$Elements = $this->textElements($text);
# convert to markup
$markup = $this->elements($Elements);
# trim line breaks
$markup = trim($markup, "\n");
# merge consecutive dl elements
$markup = preg_replace('/<\/dl>\s+<dl>\s+/', '', $markup);
# add footnotes
if (isset($this->DefinitionData['Footnote']))
{
$Element = $this->buildFootnoteElement();
$markup .= "\n" . $this->element($Element);
}
return $markup;
}
#
# Blocks
#
#
# Abbreviation
protected function blockAbbreviation($Line)
{
if (preg_match('/^\*\[(.+?)\]:[ ]*(.+?)[ ]*$/', $Line['text'], $matches))
{
$this->DefinitionData['Abbreviation'][$matches[1]] = $matches[2];
$Block = array(
'hidden' => true,
);
return $Block;
}
}
#
# Footnote
protected function blockFootnote($Line)
{
if (preg_match('/^\[\^(.+?)\]:[ ]?(.*)$/', $Line['text'], $matches))
{
$Block = array(
'label' => $matches[1],
'text' => $matches[2],
'hidden' => true,
);
return $Block;
}
}
protected function blockFootnoteContinue($Line, $Block)
{
if ($Line['text'][0] === '[' and preg_match('/^\[\^(.+?)\]:/', $Line['text']))
{
return;
}
if (isset($Block['interrupted']))
{
if ($Line['indent'] >= 4)
{
$Block['text'] .= "\n\n" . $Line['text'];
return $Block;
}
}
else
{
$Block['text'] .= "\n" . $Line['text'];
return $Block;
}
}
protected function blockFootnoteComplete($Block)
{
$this->DefinitionData['Footnote'][$Block['label']] = array(
'text' => $Block['text'],
'count' => null,
'number' => null,
);
return $Block;
}
#
# Definition List
protected function blockDefinitionList($Line, $Block)
{
if ( ! isset($Block) or $Block['type'] !== 'Paragraph')
{
return;
}
$Element = array(
'name' => 'dl',
'elements' => array(),
);
$terms = explode("\n", $Block['element']['handler']['argument']);
foreach ($terms as $term)
{
$Element['elements'] []= array(
'name' => 'dt',
'handler' => array(
'function' => 'lineElements',
'argument' => $term,
'destination' => 'elements'
),
);
}
$Block['element'] = $Element;
$Block = $this->addDdElement($Line, $Block);
return $Block;
}
protected function blockDefinitionListContinue($Line, array $Block)
{
if ($Line['text'][0] === ':')
{
$Block = $this->addDdElement($Line, $Block);
return $Block;
}
else
{
if (isset($Block['interrupted']) and $Line['indent'] === 0)
{
return;
}
if (isset($Block['interrupted']))
{
$Block['dd']['handler']['function'] = 'textElements';
$Block['dd']['handler']['argument'] .= "\n\n";
$Block['dd']['handler']['destination'] = 'elements';
unset($Block['interrupted']);
}
$text = substr($Line['body'], min($Line['indent'], 4));
$Block['dd']['handler']['argument'] .= "\n" . $text;
return $Block;
}
}
#
# Header
protected function blockHeader($Line)
{
$Block = parent::blockHeader($Line);
if (preg_match('/[ #]*{('.$this->regexAttribute.'+)}[ ]*$/', $Block['element']['handler']['argument'], $matches, PREG_OFFSET_CAPTURE))
{
$attributeString = $matches[1][0];
$Block['element']['attributes'] = $this->parseAttributeData($attributeString);
$Block['element']['handler']['argument'] = substr($Block['element']['handler']['argument'], 0, $matches[0][1]);
}
if(!isset($Block['element']['attributes']['id'])) {
$Block['element']['attributes']['id'] = self::slug($Block['element']['text']);
}
return $Block;
}
protected static function slug($s)
{
$s = preg_replace('/[^a-z0-9\-]+/i', '-', $s);
$s = preg_replace('/-+/', '-', $s);
$s = preg_replace('/^-|-$/', '', $s);
return $s;
}
#
# Markup
protected function blockMarkup($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,
'element' => array(
'rawHtml' => $Line['text'],
'autobreak' => true,
),
);
$length = strlen($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']))
{
$Block['element']['rawHtml'] .= "\n";
unset($Block['interrupted']);
}
$Block['element']['rawHtml'] .= "\n".$Line['body'];
return $Block;
}
protected function blockMarkupComplete($Block)
{
if ( ! isset($Block['void']))
{
$Block['element']['rawHtml'] = $this->processTag($Block['element']['rawHtml']);
}
return $Block;
}
#
# Setext
protected function blockSetextHeader($Line, array $Block = null)
{
$Block = parent::blockSetextHeader($Line, $Block);
if (preg_match('/[ ]*{('.$this->regexAttribute.'+)}[ ]*$/', $Block['element']['handler']['argument'], $matches, PREG_OFFSET_CAPTURE))
{
$attributeString = $matches[1][0];
$Block['element']['attributes'] = $this->parseAttributeData($attributeString);
$Block['element']['handler']['argument'] = substr($Block['element']['handler']['argument'], 0, $matches[0][1]);
}
return $Block;
}
#
# Inline Elements
#
#
# Footnote Marker
protected function inlineFootnoteMarker($Excerpt)
{
if (preg_match('/^\[\^(.+?)\]/', $Excerpt['text'], $matches))
{
$name = $matches[1];
if ( ! isset($this->DefinitionData['Footnote'][$name]))
{
return;
}
$this->DefinitionData['Footnote'][$name]['count'] ++;
if ( ! isset($this->DefinitionData['Footnote'][$name]['number']))
{
$this->DefinitionData['Footnote'][$name]['number'] = ++ $this->footnoteCount; # » &
}
$Element = array(
'name' => 'sup',
'attributes' => array('id' => 'fnref'.$this->DefinitionData['Footnote'][$name]['count'].':'.$name),
'element' => array(
'name' => 'a',
'attributes' => array('href' => '#fn:'.$name, 'class' => 'footnote-ref'),
'text' => $this->DefinitionData['Footnote'][$name]['number'],
),
);
return array(
'extent' => strlen($matches[0]),
'element' => $Element,
);
}
}
private $footnoteCount = 0;
#
# Link
protected function inlineLink($Excerpt)
{
$Link = parent::inlineLink($Excerpt);
$remainder = substr($Excerpt['text'], $Link['extent']);
if (preg_match('/^[ ]*{('.$this->regexAttribute.'+)}/', $remainder, $matches))
{
$Link['element']['attributes'] += $this->parseAttributeData($matches[1]);
$Link['extent'] += strlen($matches[0]);
}
return $Link;
}
#
# ~
#
private $currentAbreviation;
private $currentMeaning;
protected function insertAbreviation(array $Element)
{
if (isset($Element['text']))
{
$Element['elements'] = self::pregReplaceElements(
'/\b'.preg_quote($this->currentAbreviation, '/').'\b/',
array(
array(
'name' => 'abbr',
'attributes' => array(
'title' => $this->currentMeaning,
),
'text' => $this->currentAbreviation,
)
),
$Element['text']
);
unset($Element['text']);
}
return $Element;
}
protected function inlineText($text)
{
$Inline = parent::inlineText($text);
if (isset($this->DefinitionData['Abbreviation']))
{
foreach ($this->DefinitionData['Abbreviation'] as $abbreviation => $meaning)
{
$this->currentAbreviation = $abbreviation;
$this->currentMeaning = $meaning;
$Inline['element'] = $this->elementApplyRecursiveDepthFirst(
array($this, 'insertAbreviation'),
$Inline['element']
);
}
}
return $Inline;
}
#
# Util Methods
#
protected function addDdElement(array $Line, array $Block)
{
$text = substr($Line['text'], 1);
$text = trim($text);
unset($Block['dd']);
$Block['dd'] = array(
'name' => 'dd',
'handler' => array(
'function' => 'lineElements',
'argument' => $text,
'destination' => 'elements'
),
);
if (isset($Block['interrupted']))
{
$Block['dd']['handler']['function'] = 'textElements';
unset($Block['interrupted']);
}
$Block['element']['elements'] []= & $Block['dd'];
return $Block;
}
protected function buildFootnoteElement()
{
$Element = array(
'name' => 'div',
'attributes' => array('class' => 'footnotes'),
'elements' => array(
array('name' => 'hr'),
array(
'name' => 'ol',
'elements' => array(),
),
),
);
uasort($this->DefinitionData['Footnote'], 'self::sortFootnotes');
foreach ($this->DefinitionData['Footnote'] as $definitionId => $DefinitionData)
{
if ( ! isset($DefinitionData['number']))
{
continue;
}
$text = $DefinitionData['text'];
$textElements = parent::textElements($text);
$numbers = range(1, $DefinitionData['count']);
$backLinkElements = array();
foreach ($numbers as $number)
{
$backLinkElements[] = array('text' => ' ');
$backLinkElements[] = array(
'name' => 'a',
'attributes' => array(
'href' => "#fnref$number:$definitionId",
'rev' => 'footnote',
'class' => 'footnote-backref',
),
'rawHtml' => '↩',
'allowRawHtmlInSafeMode' => true,
'autobreak' => false,
);
}
unset($backLinkElements[0]);
$n = count($textElements) -1;
if ($textElements[$n]['name'] === 'p')
{
$backLinkElements = array_merge(
array(
array(
'rawHtml' => ' ',
'allowRawHtmlInSafeMode' => true,
),
),
$backLinkElements
);
unset($textElements[$n]['name']);
$textElements[$n] = array(
'name' => 'p',
'elements' => array_merge(
array($textElements[$n]),
$backLinkElements
),
);
}
else
{
$textElements[] = array(
'name' => 'p',
'elements' => $backLinkElements
);
}
$Element['elements'][1]['elements'] []= array(
'name' => 'li',
'attributes' => array('id' => 'fn:'.$definitionId),
'elements' => array_merge(
$textElements
),
);
}
return $Element;
}
/**
* Table
* @param type $Line
* @param array $Block
* @return string
*/
protected function blockTable($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'], ' -:|') === '') {
//Get all header lines
$hlines = explode("\n",$Block['element']['text']);
//Get cell alignments
$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;
}
//Start Block type
$Block = array(
'alignments' => $alignments,
'identified' => true,
'element' => array(
'name' => 'table',
'handler' => 'elements',
),
);
$Block['element']['text'] []= array(
'name' => 'caption',
'handler' => 'elements',
'text' => array()
);
$Block['element']['text'] []= array(
'name' => 'thead',
'handler' => 'elements',
'text' => array(),
);
$Block['element']['text'] []= array(
'name' => 'tbody',
'handler' => 'elements',
'text' => array(),
);
//Treating header lines
foreach($hlines as $hline) {
$HeaderElements = array();
//$header = $Block['element']['text'];
$header = $hline;
$header = trim($header);
$header = ltrim($header, '|');
$headerCells = explode('|', $header);
$colspan = 1;
foreach ($headerCells as $index => $headerCell)
{
if($headerCell=='') {
$colspan++;
if($index>0) {
$prev = $index -1;
while($prev > -1) {
if(isset($HeaderElements[$prev])) {
if(!isset($HeaderElements[$prev]['attributes']['colspan'])) {
$HeaderElements[$prev]['attributes']['colspan']=$colspan;
} else {
$HeaderElements[$prev]['attributes']['colspan'] += $colspan;
}
break;
}
$prev--;
}
}
continue;
}
$headerCell = trim($headerCell);
$HeaderElement = array(
'name' => 'th',
'text' => $headerCell,
'handler' => 'line',
);
if (isset($alignments[$index]))
{
$HeaderElement['attributes'] = array(
'style' => 'text-align: '.$alignments[$index].';',
);
}
if($colspan > 1) {
$Element['attributes']['colspan'] = $colspan;
$colspan = 1;
}
$HeaderElements[$index]= $HeaderElement;
}
$Block['element']['text'][1]['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'];
$row = preg_replace('/^ *\\| *| *\\| *$/', '', $row);
$cells = preg_split('/\\|/', $row);
preg_match_all('/(?:(\\\\[|])|[^|`]|`[^`]+`|`)+/', $row, $matches);
$colspan=1;
foreach ($cells as $index => $cell)
{
if($cell=='') {
$colspan++;
if($index>0) {
$prev = $index -1;
while($prev > -1) {
if(isset($Elements[$prev])) {
if(!isset($Elements[$prev]['attributes']['colspan'])) $Elements[$prev]['attributes']['colspan']=$colspan;
else $Elements[$prev]['attributes']['colspan'] += $colspan;
break;
}
$prev--;
}
}
continue;
}
$cell = trim($cell);
$Element = array(
'name' => 'td',
'handler' => 'line',
'text' => trim($cell),
);
if (isset($Block['alignments'][$index]))
{
$Element['attributes'] = array(
'style' => 'text-align: '.$Block['alignments'][$index].';',
);
}
if($colspan > 1) {
$Element['attributes']['colspan'] = $colspan;
$colspan = 1;
}
$Elements [$index]= $Element;
}
$Element = array(
'name' => 'tr',
'handler' => 'elements',
'text' => $Elements,
);
$Block['element']['text'][2]['text'] []= $Element;
return $Block;
} elseif (preg_match('/^\[(.*.)\]$/', $Line['text'],$parts)) { //Get Table Caption
$Block['element']['text'][0]['text'] []= array(
'name' => 'caption',
'handler' => 'line',
'text' => $parts[1],
);
return $Block;
}
}
protected $variables=array();
protected function inlineGetVariable($Excerpt)
{
if (preg_match('/^\$([a-z_]+)/', $Excerpt['text'], $m) && isset($this->variables[$m[1]])) {
return array(
'extent' => strlen($m[0]),
'markup' => $this->variables[$m[1]],
);
}
}
protected function blockVariable($Line)
{
if (preg_match('/^\$([a-z_]+)=\{(.*)/', $Line['text'], $m))
{
$Block = array(
'id' => $m[1],
'markup' => $m[2],
);
return $Block;
}
}
protected function blockVariableContinue($Line, $Block)
{
if (isset($Block['complete'])) return;
else if (isset($Block['closed'])) return;
if (isset($Block['interrupted'])) {
unset($Block['interrupted']);
}
if (substr($Line['text'], 0, 1)=='}') {
$Block['complete'] = true;
return $Block;
}
$Block['markup'] .= "\n".$Line['body'];
return $Block;
}
protected function blockVariableComplete($Block)
{
if(isset($Block['id'])) {
$this->variables[$Block['id']] = $this->text($Block['markup']);
$Block['markup']='';
}
return $Block;
}
protected function blockQuote($Line)
{
if (preg_match('/^> ?(\{'.$this->regexAttribute.'+\})? ?(.*)?/', $Line['text'], $m))
{
$Block = array(
'element' => array(
'name' => 'blockquote',
'handler' => 'lines',
'text' => (array) $m[2],
),
);
if(isset($m[1]) && $m[1]) {
$Block['element']['name'] = 'div';
$Block['element']['attributes']=$this->parseAttributeData(substr($m[1],1,strlen($m[1])-2));
}
return $Block;
}
}
protected function blockQuoteContinue($Line, array $Block)
{
if ($Line['body'][0] === '>' and preg_match('/^>[ ]?(.*)/', $Line['body'], $matches))
{
if(substr($matches[1], 0, 1)=='{' || substr($matches[1], 0, 1)=='(') return;
if (isset($Block['interrupted']))
{
$Block['element']['text'] []= '';
unset($Block['interrupted']);
}
$Block['element']['text'] []= $matches[1];
return $Block;
}
if ( ! isset($Block['interrupted']))
{
$Block['element']['text'] []= $Line['body'];
return $Block;
}
}
protected function blockSection($Line, $Block)
{
if (preg_match('/^'.$Line['text'][0].'{3,} *(\{'.$this->regexAttribute.'+\})? *$/', $Line['text'], $m)) {
$Block = array(
'char' => $Line['text'][0],
'element' => array(
'name' => 'section',
'handler'=>'text',
'text' => '',
),
);
if(isset($m[1])) {
$Block['element']['attributes']=$this->parseAttributeData(substr($m[1],1,strlen($m[1])-2));
}
unset($m);
return $Block;
}
}
protected function blockSectionContinue($Line, $Block)
{
if (isset($Block['complete'])) return;
if (isset($Block['interrupted'])) {
unset($Block['interrupted']);
}
if (preg_match('/^'.$Block['char'].'{3,} *$/', $Line['text'])) {
$Block['complete'] = true;
return $Block;
}
$Block['element']['text'] .= "\n".$Line['body'];
return $Block;
}
protected function blockSectionComplete($Block)
{
$Block['complete'] = true;
return $Block;
}
/**
* Implement: https://github.com/egil/php-markdown-extra-extended
*/
protected function blockFigure($Line, $Block)
{
if (preg_match('/^'.$Line['text'][0].'{3,} *(\[.*\])? *(\{'.$this->regexAttribute.'+\})? *$/', $Line['text'], $m)) {
$Block = array(
'char' => $Line['text'][0],
'element' => array(
'name' => 'figure',
'handler'=>'line',
'text' => '',
),
);
if (isset($m[1])) {
$Block['element']['caption']=substr($m[1],1,strlen($m[1])-2);
}
if(isset($m[2])) {
$Block['element']['attributes']=$this->parseAttributeData(substr($m[2],1,strlen($m[2])-2));
}
unset($m);
return $Block;
}
}
protected function blockFigureContinue($Line, $Block)
{
if (isset($Block['complete'])) return;
if (isset($Block['interrupted'])) {