372 lines
8.6 KiB
PHP
372 lines
8.6 KiB
PHP
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<?php
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#
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#
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# Parsedown Extra
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# https://github.com/erusev/parsedown-extra
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#
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# (c) Emanuil Rusev
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# http://erusev.com
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#
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# For the full license information, view the LICENSE file that was distributed
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# with this source code.
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#
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#
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class ParsedownExtra extends Parsedown
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{
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#
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# ~
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function __construct()
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{
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$this->BlockTypes[':'] []= 'DefinitionList';
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$this->DefinitionTypes['*'] []= 'Abbreviation';
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# identify footnote definitions before reference definitions
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array_unshift($this->DefinitionTypes['['], 'Footnote');
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# identify footnote markers before before links
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array_unshift($this->SpanTypes['['], 'FootnoteMarker');
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}
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#
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# ~
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function text($text)
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{
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$markup = parent::text($text);
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# merge consecutive dl elements
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$markup = preg_replace('/<\/dl>\s+<dl>\s+/', '', $markup);
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# add footnotes
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if (isset($this->Definitions['Footnote']))
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{
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$Element = $this->buildFootnoteElement();
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$markup .= "\n" . $this->element($Element);
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}
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return $markup;
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}
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#
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# Blocks
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#
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#
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# Atx
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protected function identifyAtx($Line)
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{
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$Block = parent::identifyAtx($Line);
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if (preg_match('/[ ]*'.$this->attributesPattern.'[ ]*$/', $Block['element']['text'], $matches, PREG_OFFSET_CAPTURE))
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{
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$attributeString = $matches[1][0];
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$Block['element']['attributes'] = $this->parseAttributes($attributeString);
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$Block['element']['text'] = substr($Block['element']['text'], 0, $matches[0][1]);
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}
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return $Block;
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}
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#
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# Definition List
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protected function identifyDefinitionList($Line, $Block)
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{
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if (isset($Block['type']))
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{
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return;
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}
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$Element = array(
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'name' => 'dl',
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'handler' => 'elements',
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'text' => array(),
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);
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$terms = explode("\n", $Block['element']['text']);
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foreach ($terms as $term)
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{
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$Element['text'] []= array(
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'name' => 'dt',
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'handler' => 'line',
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'text' => $term,
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);
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}
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$Element['text'] []= array(
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'name' => 'dd',
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'handler' => 'line',
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'text' => ltrim($Line['text'], ' :'),
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);
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$Block['element'] = $Element;
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return $Block;
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}
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protected function addToDefinitionList($Line, array $Block)
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{
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if ($Line['text'][0] === ':')
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{
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$Block['element']['text'] []= array(
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'name' => 'dd',
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'handler' => 'line',
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'text' => ltrim($Line['text'], ' :'),
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);
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return $Block;
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}
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if ( ! isset($Block['interrupted']))
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{
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$Element = array_pop($Block['element']['text']);
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$Element['text'] .= "\n" . chop($Line['text']);
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$Block['element']['text'] []= $Element;
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return $Block;
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}
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}
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#
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# Setext
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protected function identifySetext($Line, array $Block = null)
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{
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$Block = parent::identifySetext($Line, $Block);
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if (preg_match('/[ ]*'.$this->attributesPattern.'[ ]*$/', $Block['element']['text'], $matches, PREG_OFFSET_CAPTURE))
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{
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$attributeString = $matches[1][0];
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$Block['element']['attributes'] = $this->parseAttributes($attributeString);
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$Block['element']['text'] = substr($Block['element']['text'], 0, $matches[0][1]);
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}
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return $Block;
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}
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#
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# Definitions
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#
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#
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# Abbreviation
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protected function identifyAbbreviation($Line)
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{
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if (preg_match('/^\*\[(.+?)\]:[ ]*(.+?)[ ]*$/', $Line['text'], $matches))
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{
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$Abbreviation = array(
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'id' => $matches[1],
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'data' => $matches[2],
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);
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return $Abbreviation;
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}
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}
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#
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# Footnote
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protected function identifyFootnote($Line)
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{
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if (preg_match('/^\[\^(.+?)\]:[ ]?(.+)$/', $Line['text'], $matches))
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{
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$Footnote = array(
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'id' => $matches[1],
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'data' => array(
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'text' => $matches[2],
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'count' => null,
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'number' => null,
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),
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);
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return $Footnote;
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}
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}
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#
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# Spans
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#
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#
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# Footnote Marker
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protected function identifyFootnoteMarker($Excerpt)
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{
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if (preg_match('/^\[\^(.+?)\]/', $Excerpt['text'], $matches))
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{
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$name = $matches[1];
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if ( ! isset($this->Definitions['Footnote'][$name]))
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{
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return;
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}
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$this->Definitions['Footnote'][$name]['count'] ++;
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if ( ! isset($this->Definitions['Footnote'][$name]['number']))
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{
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$this->Definitions['Footnote'][$name]['number'] = ++ $this->footnoteCount; # » &
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}
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$Element = array(
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'name' => 'sup',
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'attributes' => array('id' => 'fnref'.$this->Definitions['Footnote'][$name]['count'].':'.$name),
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'handler' => 'element',
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'text' => array(
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'name' => 'a',
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'attributes' => array('href' => '#fn:'.$name, 'class' => 'footnote-ref'),
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'text' => $this->Definitions['Footnote'][$name]['number'],
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),
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);
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return array(
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'extent' => strlen($matches[0]),
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'element' => $Element,
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);
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}
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}
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private $footnoteCount = 0;
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#
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# Link
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protected function identifyLink($Excerpt)
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{
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$Span = parent::identifyLink($Excerpt);
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$remainder = substr($Excerpt['text'], $Span['extent']);
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if (preg_match('/^[ ]*'.$this->attributesPattern.'/', $remainder, $matches))
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{
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$Span['element']['attributes'] += $this->parseAttributes($matches[1]);
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$Span['extent'] += strlen($matches[0]);
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}
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return $Span;
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}
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#
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# ~
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protected function readPlainText($text)
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{
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$text = parent::readPlainText($text);
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if (isset($this->Definitions['Abbreviation']))
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{
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foreach ($this->Definitions['Abbreviation'] as $abbreviation => $phrase)
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{
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$text = str_replace($abbreviation, '<abbr title="'.$phrase.'">'.$abbreviation.'</abbr>', $text);
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}
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}
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return $text;
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}
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#
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# ~
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#
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protected function buildFootnoteElement()
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{
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$Element = array(
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'name' => 'div',
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'attributes' => array('class' => 'footnotes'),
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'handler' => 'elements',
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'text' => array(
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array(
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'name' => 'hr',
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),
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array(
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'name' => 'ol',
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'handler' => 'elements',
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'text' => array(),
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),
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),
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);
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usort($this->Definitions['Footnote'], function($A, $B) {
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return $A['number'] - $B['number'];
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});
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foreach ($this->Definitions['Footnote'] as $name => $Data)
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{
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if ( ! isset($Data['number']))
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{
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continue;
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}
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$text = $Data['text'];
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foreach (range(1, $Data['count']) as $number)
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{
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$text .= ' <a href="#fnref'.$number.':'.$name.'" rev="footnote" class="footnote-backref">↩</a>';
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}
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$Element['text'][1]['text'] []= array(
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'name' => 'li',
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'attributes' => array('id' => 'fn:'.$name),
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'handler' => 'elements',
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'text' => array(
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array(
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'name' => 'p',
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'text' => $text,
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),
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),
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);
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}
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return $Element;
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}
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#
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# Private
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#
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private function parseAttributes($attributeString)
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{
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$Data = array();
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$attributes = preg_split('/[ ]+/', $attributeString, - 1, PREG_SPLIT_NO_EMPTY);
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foreach ($attributes as $attribute)
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{
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if ($attribute[0] === '#')
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{
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$Data['id'] = substr($attribute, 1);
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}
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else # "."
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{
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$classes []= substr($attribute, 1);
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}
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}
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if (isset($classes))
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{
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$Data['class'] = implode(' ', $classes);
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}
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return $Data;
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}
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private $attributesPattern = '{((?:[#.][-\w]+[ ]*)+)}';
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}
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