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Paul Nicoué 2022-06-17 17:51:59 +02:00
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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
{
# ~
public const version = '0.8.0-beta-1';
# ~
public function __construct()
{
if (version_compare(parent::version, '1.7.1') < 0) {
throw new Exception('ParsedownExtra requires a later version of Parsedown');
}
$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($this->InlineTypes['['], 'FootnoteMarker');
}
#
# ~
public function text($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]);
}
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,
'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:$definitionId",
'rev' => 'footnote',
'class' => 'footnote-backref',
),
'rawHtml' => '&#8617;',
'allowRawHtmlInSafeMode' => true,
'autobreak' => false,
);
}
unset($backLinkElements[0]);
$n = count($textElements) -1;
if ($textElements[$n]['name'] === 'p') {
$backLinkElements = array_merge(
array(
array(
'rawHtml' => '&#160;',
'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 $Element;
}
# ~
protected function parseAttributeData($attributeString)
{
$Data = array();
$attributes = preg_split('/[ ]+/', $attributeString, - 1, PREG_SPLIT_NO_EMPTY);
foreach ($attributes as $attribute) {
if ($attribute[0] === '#') {
$Data['id'] = substr($attribute, 1);
} else { # "."
$classes []= substr($attribute, 1);
}
}
if (isset($classes)) {
$Data['class'] = implode(' ', $classes);
}
return $Data;
}
# ~
protected function processTag($elementMarkup) # recursive
{
# http://stackoverflow.com/q/1148928/200145
libxml_use_internal_errors(true);
$DOMDocument = new DOMDocument();
# http://stackoverflow.com/q/11309194/200145
$elementMarkup = mb_convert_encoding($elementMarkup, 'HTML-ENTITIES', 'UTF-8');
# Ensure that saveHTML() is not remove new line characters. New lines will be split by this character.
$DOMDocument->formatOutput = true;
# http://stackoverflow.com/q/4879946/200145
$DOMDocument->loadHTML($elementMarkup);
$DOMDocument->removeChild($DOMDocument->doctype);
$DOMDocument->replaceChild($DOMDocument->firstChild->firstChild->firstChild, $DOMDocument->firstChild);
$elementText = '';
if ($DOMDocument->documentElement->getAttribute('markdown') === '1') {
foreach ($DOMDocument->documentElement->childNodes as $Node) {
$elementText .= $DOMDocument->saveHTML($Node);
}
$DOMDocument->documentElement->removeAttribute('markdown');
$elementText = "\n".$this->text($elementText)."\n";
} else {
foreach ($DOMDocument->documentElement->childNodes as $Node) {
$nodeMarkup = $DOMDocument->saveHTML($Node);
if ($Node instanceof DOMElement and ! in_array($Node->nodeName, $this->textLevelElements)) {
$elementText .= $this->processTag($nodeMarkup);
} else {
$elementText .= $nodeMarkup;
}
}
}
# because we don't want for markup to get encoded
$DOMDocument->documentElement->nodeValue = 'placeholder\x1A';
$markup = $DOMDocument->saveHTML($DOMDocument->documentElement);
$markup = str_replace('placeholder\x1A', $elementText, $markup);
return $markup;
}
# ~
protected function sortFootnotes($A, $B) # callback
{
return $A['number'] - $B['number'];
}
#
# Fields
#
protected $regexAttribute = '(?:[#.][-\w]+[ ]*)';
}

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The MIT License
Copyright (c) 2011 Vladimir Andersen
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

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