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contributions/text.htmlpurifier/lib/helpers/converters/htmlpurifier.autoparagraph.converter.php

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<?php
/**
 * Convert HTML to purified HTML, automatically inserting paragraphps
 * 
 * @author Gerd Riesselmann
 * @ingroup HtmlPurifier
 */
class ConverterHtmlPurifierAutoParagraph extends ConverterHtmlPurifier {
        /**
         * Purify HTML
         * 
         * @param string $value
         * @param array See http://htmlpurifier.org/live/configdoc/plain.html for all possible values
         */
        public function encode($value, $params = false) {
                if (is_null($value) || $value instanceof DBNull) {
                        return $value;
                }
                
                $input = trim($value);
                $input = str_replace("\r", "\n", $input);
                $input = preg_replace('|<br.*?>|', "\n", $input);
                $input = String::preg_replace('|\n\n+|m', "\n", $input);
                $input = str_replace("\n", "\n\n", $input);
                $params = array_merge(array(
                        'AutoFormat.RemoveEmpty' => true,
                        'AutoFormat.RemoveEmpty.RemoveNbsp' => true,
                        'AutoFormat.AutoParagraph' => true
                        ), Arr::force($params, false)
                );
                $input = parent::encode($input, $params);
                $input = String::preg_replace('|\n\n+|m', "\n", $input);        
                return $input;  
        }
} 

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