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638 lines
18 KiB
638 lines
18 KiB
2 months ago
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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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public const version = '0.8.0-beta-1';
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# ~
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public function __construct()
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{
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if (version_compare(parent::version, '1.7.1') < 0) {
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throw new Exception('ParsedownExtra requires a later version of Parsedown');
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}
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$this->BlockTypes[':'] []= 'DefinitionList';
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$this->BlockTypes['*'] []= 'Abbreviation';
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# identify footnote definitions before reference definitions
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array_unshift($this->BlockTypes['['], 'Footnote');
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# identify footnote markers before before links
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array_unshift($this->InlineTypes['['], 'FootnoteMarker');
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}
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#
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# ~
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public function text($text)
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{
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$Elements = $this->textElements($text);
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# convert to markup
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$markup = $this->elements($Elements);
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# trim line breaks
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$markup = trim($markup, "\n");
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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->DefinitionData['Footnote'])) {
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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 $markup;
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}
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#
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# Blocks
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#
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#
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# Abbreviation
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protected function blockAbbreviation($Line)
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{
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if (preg_match('/^\*\[(.+?)\]:[ ]*(.+?)[ ]*$/', $Line['text'], $matches)) {
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$this->DefinitionData['Abbreviation'][$matches[1]] = $matches[2];
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$Block = array(
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'hidden' => true,
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);
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return $Block;
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}
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}
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#
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# Footnote
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protected function blockFootnote($Line)
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{
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if (preg_match('/^\[\^(.+?)\]:[ ]?(.*)$/', $Line['text'], $matches)) {
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$Block = array(
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'label' => $matches[1],
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'text' => $matches[2],
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'hidden' => true,
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);
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return $Block;
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}
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}
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protected function blockFootnoteContinue($Line, $Block)
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{
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if ($Line['text'][0] === '[' and preg_match('/^\[\^(.+?)\]:/', $Line['text'])) {
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return;
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}
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if (isset($Block['interrupted'])) {
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if ($Line['indent'] >= 4) {
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$Block['text'] .= "\n\n" . $Line['text'];
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return $Block;
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}
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} else {
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$Block['text'] .= "\n" . $Line['text'];
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return $Block;
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}
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}
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protected function blockFootnoteComplete($Block)
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{
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$this->DefinitionData['Footnote'][$Block['label']] = array(
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'text' => $Block['text'],
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'count' => null,
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'number' => null,
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);
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return $Block;
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}
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#
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# Definition List
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protected function blockDefinitionList($Line, $Block)
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{
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if (! isset($Block) or $Block['type'] !== 'Paragraph') {
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return;
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}
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$Element = array(
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'name' => 'dl',
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'elements' => array(),
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);
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$terms = explode("\n", $Block['element']['handler']['argument']);
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foreach ($terms as $term) {
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$Element['elements'] []= array(
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'name' => 'dt',
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'handler' => array(
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'function' => 'lineElements',
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'argument' => $term,
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'destination' => 'elements'
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),
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);
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}
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$Block['element'] = $Element;
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$Block = $this->addDdElement($Line, $Block);
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return $Block;
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}
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protected function blockDefinitionListContinue($Line, array $Block)
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{
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if ($Line['text'][0] === ':') {
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$Block = $this->addDdElement($Line, $Block);
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return $Block;
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} else {
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if (isset($Block['interrupted']) and $Line['indent'] === 0) {
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return;
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}
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if (isset($Block['interrupted'])) {
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$Block['dd']['handler']['function'] = 'textElements';
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$Block['dd']['handler']['argument'] .= "\n\n";
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$Block['dd']['handler']['destination'] = 'elements';
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unset($Block['interrupted']);
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}
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$text = substr($Line['body'], min($Line['indent'], 4));
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$Block['dd']['handler']['argument'] .= "\n" . $text;
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return $Block;
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}
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}
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#
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# Header
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protected function blockHeader($Line)
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{
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$Block = parent::blockHeader($Line);
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if (preg_match('/[ #]*{('.$this->regexAttribute.'+)}[ ]*$/', $Block['element']['handler']['argument'], $matches, PREG_OFFSET_CAPTURE)) {
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$attributeString = $matches[1][0];
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$Block['element']['attributes'] = $this->parseAttributeData($attributeString);
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$Block['element']['handler']['argument'] = substr($Block['element']['handler']['argument'], 0, $matches[0][1]);
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}
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return $Block;
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}
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#
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# Markup
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protected function blockMarkup($Line)
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{
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if ($this->markupEscaped or $this->safeMode) {
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return;
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}
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if (preg_match('/^<(\w[\w-]*)(?:[ ]*'.$this->regexHtmlAttribute.')*[ ]*(\/)?>/', $Line['text'], $matches)) {
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$element = strtolower($matches[1]);
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if (in_array($element, $this->textLevelElements)) {
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return;
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}
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$Block = array(
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'name' => $matches[1],
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'depth' => 0,
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'element' => array(
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'rawHtml' => $Line['text'],
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'autobreak' => true,
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),
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);
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$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], $this->voidElements)) {
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$Block['closed'] = true;
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$Block['void'] = true;
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}
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} else {
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if (isset($matches[2]) or in_array($matches[1], $this->voidElements)) {
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return;
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}
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if (preg_match('/<\/'.$matches[1].'>[ ]*$/i', $remainder)) {
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$Block['closed'] = true;
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}
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}
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return $Block;
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}
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}
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protected function blockMarkupContinue($Line, array $Block)
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{
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if (isset($Block['closed'])) {
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return;
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}
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if (preg_match('/^<'.$Block['name'].'(?:[ ]*'.$this->regexHtmlAttribute.')*[ ]*>/i', $Line['text'])) { # open
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$Block['depth'] ++;
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}
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if (preg_match('/(.*?)<\/'.$Block['name'].'>[ ]*$/i', $Line['text'], $matches)) { # close
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if ($Block['depth'] > 0) {
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$Block['depth'] --;
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} else {
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$Block['closed'] = true;
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}
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}
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if (isset($Block['interrupted'])) {
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$Block['element']['rawHtml'] .= "\n";
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unset($Block['interrupted']);
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}
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$Block['element']['rawHtml'] .= "\n".$Line['body'];
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return $Block;
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}
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protected function blockMarkupComplete($Block)
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{
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if (! isset($Block['void'])) {
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$Block['element']['rawHtml'] = $this->processTag($Block['element']['rawHtml']);
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}
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return $Block;
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}
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#
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# Setext
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protected function blockSetextHeader($Line, array $Block = null)
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{
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$Block = parent::blockSetextHeader($Line, $Block);
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if (preg_match('/[ ]*{('.$this->regexAttribute.'+)}[ ]*$/', $Block['element']['handler']['argument'], $matches, PREG_OFFSET_CAPTURE)) {
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$attributeString = $matches[1][0];
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$Block['element']['attributes'] = $this->parseAttributeData($attributeString);
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$Block['element']['handler']['argument'] = substr($Block['element']['handler']['argument'], 0, $matches[0][1]);
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}
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return $Block;
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}
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#
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# Inline Elements
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#
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#
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# Footnote Marker
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protected function inlineFootnoteMarker($Excerpt)
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{
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if (preg_match('/^\[\^(.+?)\]/', $Excerpt['text'], $matches)) {
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$name = $matches[1];
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if (! isset($this->DefinitionData['Footnote'][$name])) {
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return;
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}
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$this->DefinitionData['Footnote'][$name]['count'] ++;
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if (! isset($this->DefinitionData['Footnote'][$name]['number'])) {
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$this->DefinitionData['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'.$this->DefinitionData['Footnote'][$name]['count'].':'.$name),
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'element' => array(
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'name' => 'a',
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'attributes' => array('href' => '#fn:'.$name, 'class' => 'footnote-ref'),
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'text' => $this->DefinitionData['Footnote'][$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 $footnoteCount = 0;
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#
|
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# Link
|
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|
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protected function inlineLink($Excerpt)
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{
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$Link = parent::inlineLink($Excerpt);
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$remainder = substr($Excerpt['text'], $Link['extent']);
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if (preg_match('/^[ ]*{('.$this->regexAttribute.'+)}/', $remainder, $matches)) {
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$Link['element']['attributes'] += $this->parseAttributeData($matches[1]);
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$Link['extent'] += strlen($matches[0]);
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}
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return $Link;
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}
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|
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|
||
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#
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||
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# ~
|
||
|
|
#
|
||
|
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|
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private $currentAbreviation;
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private $currentMeaning;
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protected function insertAbreviation(array $Element)
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{
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if (isset($Element['text'])) {
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$Element['elements'] = self::pregReplaceElements(
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'/\b'.preg_quote($this->currentAbreviation, '/').'\b/',
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array(
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array(
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'name' => 'abbr',
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'attributes' => array(
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'title' => $this->currentMeaning,
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),
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'text' => $this->currentAbreviation,
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)
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),
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$Element['text']
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);
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unset($Element['text']);
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}
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return $Element;
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}
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protected function inlineText($text)
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{
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$Inline = parent::inlineText($text);
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||
|
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|
||
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if (isset($this->DefinitionData['Abbreviation'])) {
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foreach ($this->DefinitionData['Abbreviation'] as $abbreviation => $meaning) {
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$this->currentAbreviation = $abbreviation;
|
||
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$this->currentMeaning = $meaning;
|
||
|
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|
||
|
|
$Inline['element'] = $this->elementApplyRecursiveDepthFirst(
|
||
|
|
array($this, 'insertAbreviation'),
|
||
|
|
$Inline['element']
|
||
|
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);
|
||
|
|
}
|
||
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}
|
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|
|
||
|
|
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'], [$this,'sortFootnotes']);
|
||
|
|
|
||
|
|
foreach ($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 $Element;
|
||
|
|
}
|
||
|
|
|
||
|
|
# ~
|
||
|
|
|
||
|
|
protected function parseAttributeData($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);
|
||
|
|
|
||
|
|
$DOMDocument = new DOMDocument();
|
||
|
|
|
||
|
|
// Migrating away from `mb_convert_encoding($elementMarkup,
|
||
|
|
//'HTML-ENTITIES', 'UTF-8');` has caused multibyte characters like
|
||
|
|
// emojis not to be converted into entities, which is needed so that
|
||
|
|
// the `DOM` extension can properly parse the markup.
|
||
|
|
// The following line works like this: It treats the input string
|
||
|
|
// as UTF-8 and converts every Unicode character with 8 or more bits
|
||
|
|
// (= character code starting at 128 or 0x80 up to the Unicode limit
|
||
|
|
// of 0x10ffff) to an entity; the third and fourth arguments for the
|
||
|
|
// map are not needed for our use case and are set to the default values
|
||
|
|
// (no offset and a full mask)
|
||
|
|
// [http://stackoverflow.com/q/11309194/200145]
|
||
|
|
$elementMarkup = mb_encode_numericentity($elementMarkup, [0x80, 0x10ffff, 0, 0xffffff], '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]+[ ]*)';
|
||
|
|
}
|