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<?php | |
/** | |
* ✔ pos. tested with Parsedown 1.7.4 | |
* | |
* This allows usage of image dimensions this way: | |
* ![odyssee2001](http://example.com/Odyssey2001.png =100x100) | |
* ![odyssee2001](http://example.com/Odyssey2001.png =100x100 "Even with Title") | |
* | |
* @related | |
* https://github.com/erusev/parsedown/issues/723 | |
* https://stackoverflow.com/a/21242579/2487859 | |
* @copyright ueffing.net | |
* @author Guido K.B.W. Üffing <info@ueffing.net> | |
* @license GNU GENERAL PUBLIC LICENSE Version 3. | |
*/ | |
class BParsedown extends \Parsedown | |
{ | |
/** | |
* @param $aExcerpt | |
* @return array|void | |
*/ | |
protected function inlineImage($aExcerpt) | |
{ | |
if ( ! isset($aExcerpt['text'][1]) or $aExcerpt['text'][1] !== '[') | |
{ | |
return; | |
} | |
$aExcerpt['text'] = self::getRelevantMarkdown($aExcerpt['text']); | |
$aExcerpt['text']= mb_substr($aExcerpt['text'], 1); | |
// watch out for link | |
$aLink = $this->inlineLink($aExcerpt); | |
// grab infos from string... | |
$sAlt = strtok(mb_substr(strchr($aExcerpt['text'], '['), 1), ']'); | |
$sTitle = strtok(mb_substr(strchr($aExcerpt['text'], '"'), 0), '"'); | |
$sUrl = current(self::getUrlFromString($aExcerpt['text'])); | |
$mStrChr = mb_strrchr($aExcerpt['text'], '='); | |
list($iWidth, $iHeight) = (false !== $mStrChr) ? array_map('intval', explode('x', mb_substr($mStrChr, 1))) : array('', ''); | |
// ...or from Link | |
(true === empty($sAlt) && isset($aLink['element']['text'])) ? $sAlt = $aLink['element']['text'] : false; | |
(true === empty($sUrl) && isset($aLink['element']['attributes']['href'])) ? $sUrl = $aLink['element']['attributes']['href'] : false; | |
(true === empty($sTitle) && isset($aLink['element']['attributes']['title'])) ? $sTitle = $aLink['element']['attributes']['title'] : false; | |
(true === empty($iWidth) && isset($aLink['element']['attributes']['width'])) ? $iWidth = $aLink['element']['attributes']['width'] : false; | |
(true === empty($iHeight) && isset($aLink['element']['attributes']['height'])) ? $iHeight = $aLink['element']['attributes']['height'] : false; | |
(false === isset($sTitle) || true === empty($sTitle)) ? $sTitle = $sAlt : false; | |
$aInline = parent::inlineImage($aExcerpt); | |
$aInline['element']['name'] = 'img'; | |
$aInline['element']['attributes'] = []; | |
$aInline['extent'] = mb_strlen($aExcerpt['text']) + 2; | |
(false === empty($sUrl)) ? $aInline['element']['attributes']['src'] = $sUrl : false; | |
(false === empty($sAlt)) ? $aInline['element']['attributes']['alt'] = $sAlt : false; | |
(false === empty($sTitle)) ? $aInline['element']['attributes']['title'] = $sTitle : false; | |
(false === empty($iWidth)) ? $aInline['element']['attributes']['width'] = $iWidth : false; | |
(false === empty($iHeight)) ? $aInline['element']['attributes']['height'] = $iHeight : false; | |
return $aInline; | |
} | |
/** | |
* modified regex to match image dimensions in reference links | |
* @example [1]: http://example.com/foo.png =50x50 "example image" | |
* @see https://regexr.com/4rjlp | |
* @see https://blog.ueffing.net/post/2020/01/01/parsedown-image-size-dimension-attribute/ | |
* @param string $sLine | |
* @return array | |
*/ | |
protected function blockReference($sLine = '') | |
{ | |
$bPregMatchLine = (boolean) preg_match( | |
'' | |
. '/^\[(.+?)\]:[ ]*<?(\S+?)>?' | |
. '(' | |
.'?:' | |
.'[\s]+[=]+[(0-9)]+[x]+[(0-9)]+[\s]' # this (with image dimensions. e.g. =50x50) | |
.'+["\'(](.+)["\')]' | |
.'|' # or | |
.'[\s]+["\'(](.+)["\')]' # that (without; standard) | |
.')' | |
. '?[ ]*$/', | |
$sLine['text'], | |
$aMatchLine | |
); | |
// skip empty ones | |
$aMatchLine = array_values(array_filter($aMatchLine)); | |
if (true === $bPregMatchLine) | |
{ | |
$iId = strtolower($aMatchLine[1]); | |
$aData = array( | |
'url' => $aMatchLine[2], | |
'title' => null, | |
); | |
(isset($aMatchLine[3])) ? $aData['title'] = $aMatchLine[3] : false; | |
IMAGE_DIMSENSION: { | |
$sPatternImageDimension = '/[=]+[(0-9)]+[x]+[(0-9)]*/'; # e.g. =50x50 | |
$bPregMatchImageDimension = (boolean) preg_match( | |
$sPatternImageDimension, | |
$aMatchLine[0], | |
$aMatchImageDimension | |
); | |
if (true === $bPregMatchImageDimension) | |
{ | |
$sMatchImageDimension = current($aMatchImageDimension); | |
$mStrChr = mb_strrchr($sMatchImageDimension, '='); | |
list($aData['width'], $aData['height']) = (false !== $mStrChr) ? array_map('intval', explode('x', mb_substr($mStrChr, 1))) : array('', ''); | |
} | |
} | |
$this->DefinitionData['Reference'][$iId] = $aData; | |
$aBlock = array('hidden' => true); | |
return $aBlock; | |
} | |
} | |
/** | |
* @param array $aExcerpt | |
* @return array|void | |
*/ | |
protected function inlineLink($aExcerpt) | |
{ | |
$iExtent = 0; | |
$sText = $aExcerpt['text']; | |
$aElement = array( | |
'name' => 'a', | |
'handler' => 'line', | |
'nonNestables' => array('Url', 'Link'), | |
'text' => null, | |
'attributes' => array( | |
'href' => null, | |
'title' => null, | |
), | |
); | |
if (preg_match('/\[((?:[^][]++|(?R))*+)\]/', $sText, $aMatch)) | |
{ | |
$aElement['text'] = $aMatch[1]; | |
$iExtent += strlen($aMatch[0]); | |
$sText = substr($sText, $iExtent); | |
} | |
else | |
{ | |
return; | |
} | |
if (preg_match('/^[(]\s*+((?:[^ ()]++|[(][^ )]+[)])++)(?:[ ]+("[^"]*"|\'[^\']*\'))?\s*[)]/', $sText, $aMatch)) | |
{ | |
$aElement['attributes']['href'] = $aMatch[1]; | |
(isset($aMatch[2])) ? $aElement['attributes']['title'] = substr($aMatch[2], 1, - 1) : false; | |
$iExtent += strlen($aMatch[0]); | |
} | |
else | |
{ | |
if (preg_match('/^\s*\[(.*?)\]/', $sText, $aMatch)) | |
{ | |
$sDefinition = strlen($aMatch[1]) ? $aMatch[1] : $aElement['text']; | |
$sDefinition = strtolower($sDefinition); | |
$iExtent += strlen($aMatch[0]); | |
} | |
else | |
{ | |
$sDefinition = strtolower($aElement['text']); | |
} | |
if ( ! isset($this->DefinitionData['Reference'][$sDefinition])) | |
{ | |
return; | |
} | |
$aDefinition = $this->DefinitionData['Reference'][$sDefinition]; | |
$aElement['attributes']['href'] = $aDefinition['url']; | |
$aElement['attributes']['title'] = $aDefinition['title']; | |
(isset($aDefinition['width'])) ? $aElement['attributes']['width'] = $aDefinition['width'] : false; | |
(isset($aDefinition['height'])) ? $aElement['attributes']['height'] = $aDefinition['height'] : false; | |
} | |
$aReturn = array( | |
'extent' => $iExtent, | |
'element' => $aElement, | |
); | |
return $aReturn; | |
} | |
/** | |
* @param string $sText | |
* @return mixed|string | |
*/ | |
protected static function getRelevantMarkdown($sText = '') | |
{ | |
$aExplode = preg_split("@!\[@", $sText, NULL, PREG_SPLIT_NO_EMPTY); | |
$sValue = ''; | |
foreach ($aExplode as $iKey => $sValue) | |
{ | |
$sValue = '![' . strtok($sValue, ')') . ')'; | |
$sValue = strtok($sValue, ')'); | |
if ($sValue[1] != '['){continue;} # skip irrelevant | |
break; | |
} | |
// this is what we want | |
return $sValue; | |
} | |
/** | |
* @param string $sContent | |
* @return array | |
*/ | |
protected static function getUrlFromString($sContent = '') | |
{ | |
$sPattern = "/(?:(?:\/|https?|ftp))[-a-z0-9+&@#\/%?=~_|!:,.;]*[-a-z0-9+&@#\/%=~_|]/i"; | |
preg_match_all( | |
$sPattern, | |
$sContent, | |
$aMatch, | |
PREG_PATTERN_ORDER | |
); | |
return current($aMatch); | |
} | |
} |
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