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Override's some of Parsedown's features to add support for github style task lists. You must build your own serverside & client side components for updating the markdown. The value of the checkbox is it's index of the checkbox based on all of the checkboxes found in the markdown.
<?php
/**
* Override's some of Parsedown's features to add support for github style task lists.
* You must build your own serverside & client side components for updating the markdown.
* The value of the checkbox is it's index of the checkbox based on all of the checkboxes found in the markdown.
* @see https://github.com/erusev/parsedown
*/
class TaskListParsedown extends Parsedown {
protected $taskListIndex=0;
#
# List
protected function identifyList($Line) {
list($name, $pattern)=($Line['text'][0]<='-' ? array('ul', '[*+-]'):array('ol', '[0-9]+[.]'));
if(preg_match('/^('.$pattern.'[ ]+)(.*)/', $Line['text'], $matches)) {
$Block=array(
'indent'=>$Line['indent'],
'pattern'=>$pattern,
'element'=>array(
'name'=>$name,
'handler'=>'elements',
),
);
$Block['li']=$this->identifyTaskList($matches[2], $Block);
$Block['element']['text'][]=&$Block['li'];
return $Block;
}
}
protected function addToList($Line, array $Block) {
if($Block['indent']===$Line['indent'] && preg_match('/^'.$Block['pattern'].'[ ]+(.*)/', $Line['text'], $matches)) {
if(isset($Block['interrupted'])) {
$Block['li']['text'][]= '';
unset($Block['interrupted']);
}
unset($Block['li']);
$Block['li']=$this->identifyTaskList($matches[1], $Block);
$Block['element']['text'][]=&$Block['li'];
return $Block;
}
if(!isset($Block['interrupted'])) {
$text=preg_replace('/^[ ]{0,4}/', '', $Line['body']);
$Block['li']['text'][]=$text;
return $Block;
}
if($Line['indent']>0) {
$Block['li']['text'][]='';
$text = preg_replace('/^[ ]{0,4}/', '', $Line['body']);
$Block['li']['text'][]=$text;
unset($Block['interrupted']);
return $Block;
}
}
protected function identifyTaskList($lineText, &$Block) {
if(preg_match('/^(\s*)\[(\s|x)\](.*?)$/i', $lineText, $matches)) {
$result=array();
if(count($matches)>3) {
if(!array_key_exists('taskList', $Block['element'])) {
if(!array_key_exists('attributes', $Block['element'])) {
$Block['element']['attributes']=array('class'=>'taskList');
}else {
$Block['element']['attributes']['class']='taskList';
}
$Block['element']['taskList']=true;
}
if(!empty($matches[1])) {
$result[]=$matches[1];
}
$checkID='md-check-'.uniqid(time());
$result['input']=array(
'name'=>'input',
'attributes'=>array(
'type'=>'checkbox',
'name'=>$checkID,
'id'=>$checkID,
'value'=>'1'
)
);
if(strtolower($matches[2])=='x') {
$result['input']['attributes']['checked']='checked';
}
$result['label']=array(
'name'=>'label',
'handler'=>'line',
'attributes'=>array('for'=>$checkID),
'text'=>$matches[3]
);
$lineText='<p>';
foreach($result as $item) {
$lineText.=$this->element($item);
}
$lineText.='</p>';
//Increment the index
$this->taskListIndex++;
}
}
return array(
'name'=>'li',
'handler'=>'li',
'text'=>array($lineText)
);
}
}
?>
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