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<?php |
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namespace PiedWeb\CMSBundle\Twig; |
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use Michelf\MarkdownExtra; |
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/** |
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* MarkdownParser |
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* from https://raw.githubusercontent.com/KnpLabs/KnpMarkdownBundle/master/Parser/MarkdownParser.php |
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* This class extends the original Markdown parser. |
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* It allows to disable unwanted features to increase performances. |
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*/ |
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class MarkdownParser extends MarkdownExtra |
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{ |
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/** |
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* Use the constructor to disable some of them. |
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* |
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* @var array Enabled features |
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*/ |
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protected $features = [ |
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'header' => true, |
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'list' => true, |
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'horizontal_rule' => true, |
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'table' => true, |
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'foot_note' => true, |
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'fenced_code_block' => true, |
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'abbreviation' => true, |
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'definition_list' => true, |
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'inline_link' => true, // [link text](url "optional title") |
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'reference_link' => true, // [link text] [id] |
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'shortcut_link' => true, // [link text] |
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'images' => true, |
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'block_quote' => true, |
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'code_block' => true, |
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'html_block' => true, |
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'auto_link' => true, |
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'auto_mailto' => true, |
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'entities' => true, |
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'no_html' => false, |
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]; |
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/** |
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* Create a new instance and enable or disable features. |
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* |
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* @param array $features enabled or disabled features |
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* |
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* You can pass an array of features to disable some of them for performance improvement. |
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* E.g. |
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* $features = array( |
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* 'table' => false, |
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* 'definition_list' => false |
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* ) |
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*/ |
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public function __construct(array $features = []) |
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{ |
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parent::__construct(); |
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$this->features = array_merge($this->features, $features); |
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if (!$this->features['header']) { |
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unset($this->block_gamut['doHeaders']); |
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} |
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if (!$this->features['list']) { |
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unset($this->block_gamut['doLists']); |
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} |
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if (!$this->features['horizontal_rule']) { |
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unset($this->block_gamut['doHorizontalRules']); |
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} |
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if (!$this->features['table']) { |
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unset($this->block_gamut['doTables']); |
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} |
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if (!$this->features['foot_note']) { |
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unset($this->document_gamut['stripFootnotes']); |
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unset($this->document_gamut['appendFootnotes']); |
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unset($this->span_gamut['doFootnotes']); |
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} |
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if (!$this->features['fenced_code_block']) { |
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unset($this->document_gamut['doFencedCodeBlocks']); |
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unset($this->block_gamut['doFencedCodeBlocks']); |
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} |
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if (!$this->features['abbreviation']) { |
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unset($this->document_gamut['stripAbbreviations']); |
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unset($this->span_gamut['doAbbreviations']); |
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} |
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if (!$this->features['definition_list']) { |
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unset($this->block_gamut['doDefLists']); |
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} |
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if (!$this->features['reference_link']) { |
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unset($this->document_gamut['stripLinkDefinitions']); |
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} |
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if (!$this->features['images']) { |
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unset($this->span_gamut['doImages']); |
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} |
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if (!$this->features['block_quote']) { |
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unset($this->block_gamut['doBlockQuotes']); |
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} |
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if (!$this->features['code_block']) { |
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unset($this->block_gamut['doCodeBlocks']); |
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} |
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if (!$this->features['auto_link']) { |
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unset($this->span_gamut['doAutoLinks']); |
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} |
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if (false === $this->features['entities']) { |
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$this->no_entities = true; |
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} |
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if (true === $this->features['no_html']) { |
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$this->no_markup = true; |
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} |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function transformMarkdown($text) |
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{ |
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return parent::transform($text); |
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} |
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/** |
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* MarkdownExtraParser overwritten methods. |
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*/ |
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/** |
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* Simplify detab. |
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*/ |
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public function detab($text) |
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{ |
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return str_replace("\t", str_repeat(' ', $this->tab_width), $text); |
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} |
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/** |
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* Disable unless html_block. |
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*/ |
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public function hashHTMLBlocks($text) |
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{ |
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if (!$this->features['html_block']) { |
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return $text; |
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} |
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return parent::hashHTMLBlocks($text); |
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} |
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/** |
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* Disable mailto unless auto_mailto. |
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*/ |
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public function doAutoLinks($text) |
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{ |
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if (!$this->features['auto_mailto']) { |
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return preg_replace_callback( |
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'{<((https?|ftp|dict):[^\'">\s]+)>}i', |
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[&$this, '_doAutoLinks_url_callback'], |
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$text |
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); |
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} |
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return parent::doAutoLinks($text); |
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} |
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/** |
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* Conditional features: reference_link, inline_link,. |
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*/ |
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public function doAnchors($text) |
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{ |
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// |
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// Turn Markdown link shortcuts into XHTML <a> tags. |
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// |
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if ($this->in_anchor) { |
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return $text; |
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} |
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$this->in_anchor = true; |
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// |
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// First, handle reference-style links: [link text] [id] |
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// |
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if ($this->features['reference_link']) { |
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$text = preg_replace_callback( |
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'{ |
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( # wrap whole match in $1 |
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\[ |
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('.$this->nested_brackets_re.') # link text = $2 |
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\] |
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[ ]? # one optional space |
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(?:\n[ ]*)? # one optional newline followed by spaces |
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\[ |
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(.*?) # id = $3 |
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\] |
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) |
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}xs', |
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[&$this, '_doAnchors_reference_callback'], |
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$text |
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); |
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} |
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// |
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// Next, inline-style links: [link text](url "optional title") |
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// |
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if ($this->features['inline_link']) { |
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$text = preg_replace_callback( |
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'{ |
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( # wrap whole match in $1 |
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\[ |
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('.$this->nested_brackets_re.') # link text = $2 |
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\] |
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\( # literal parent |
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[ \n]* |
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(?: |
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<(.+?)> # href = $3 |
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| |
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('.$this->nested_url_parenthesis_re.') # href = $4 |
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) |
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[ \n]* |
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( # $5 |
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([\'"]) # quote char = $6 |
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(.*?) # Title = $7 |
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\6 # matching quote |
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[ \n]* # ignore any spaces/tabs between closing quote and ) |
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)? # title is optional |
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\) |
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(?:[ ]? '.$this->id_class_attr_catch_re.' )? # $8 = id/class attributes |
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) |
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}xs', |
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[&$this, '_doAnchors_inline_callback'], |
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$text |
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); |
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} |
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// |
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// Last, handle reference-style shortcuts: [link text] |
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// These must come last in case you've also got [link text][1] |
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// or [link text](/foo) |
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// |
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if ($this->features['shortcut_link']) { |
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$text = preg_replace_callback( |
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'{ |
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( # wrap whole match in $1 |
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\[ |
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([^\[\]]+) # link text = $2; can\'t contain [ or ] |
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\] |
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) |
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}xs', |
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[&$this, '_doAnchors_reference_callback'], |
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$text |
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); |
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} |
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$this->in_anchor = false; |
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return $text; |
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} |
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} |
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PiedWeb /
CMS
