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✏️ Editing: creole.php

<?php

/**
 * Creole parser implementation
 *
 * @author Josep Arús
 *
 * @license http://www.gnu.org/copyleft/gpl.html GNU Public License
 * @package mod_wiki
 */

include_once("wikimarkup.php");

class creole_parser extends wiki_markup_parser {

protected $blockrules = array(
        'nowiki' => array(
            'expression' => "/^\{\{\{(.*?)\}\}\}/ims",
            'tags' => array(),
            'token' => array('{{{', '}}}')
        ),
        'header' => array(
            'expression' => "/^\ *(={1,6})\ *(.+?)=*\ *$/ims",
            'tags' => array(), //none
            'token' => '='
        ),
        'table' => array(
            'expression' => "/^(?:\|.*?\|\ *\n)+/ims"
        ),
        'line_break' => array(
            'expression' => "/^----\s*$/im",
            'token' => '----',
            'tags' => array()
        ),
        'list' => array(
            'expression' => "/((?:^\ *[\*#][^\*#]\ *.+?)(?:^\ *[\*#]{1,5}\ *.+?)*)(\n\s*(?:\n|<(?:h\d|pre|table|tbody|thead|tr|th|td|ul|li|ol|hr)))/ims",
            'tags' => array(),
            'token' => array('*', '#')
        ),
        'paragraph' => array(
            'expression' => "/^\ *((?:<(?!\ *\/?(?:h\d|pre|table|tbody|thead|tr|th|td|ul|li|ol|hr)\ *\/?>)|[^<\s]).+?)\n\s*\n/ims",
            //not specified -> all tags (null or unset)
            'tag' => 'p'
        )
    );

protected $tagrules = array(
        'nowiki' => array(
            'expression' => "/\{\{\{(.*?)\}\}\}/is",
            'token' => array('{{{', '}}}')
        ),
        'image' => array(
            'expression' => "/\~?\{\{(.+)\|(.+)\}\}/i",
            'tags' => array(),
            'token' => array('{{', '|Alt}}')
        ),
        'link' => array(
            'expression' => "/\~?\[\[(.+?)\]\]/is",
            'tag' => 'a',
            'token' => array('[[', ']]')
        ),
        'url' => array(
            'expression' => "/\~?(?<!=\")((?:https?|ftp):\/\/[^\s\n]+[^,\.\?!:;\"\'\n\ ])/is",
            'tag' => 'a',
            'token' => "http://"
        ),
        'line_break' => array(
            'expression' => "/\\\\\\\\/",
            'tag' => 'br',
            'simple' => true,
            'token' => '----'
        ),
        'bold' => array(
            'expression' => "/\*\*(.*?)(?:\*\*|$)/is",
            'tag' => 'strong',
            'token' => array('**', '**')
        ),
        'italic' => array(
            'expression' => "#(?<!http:|https:|ftp:)//(.+?)(?<!http:|https:|ftp:)//#is",
            'tag' => 'em',
            'token' => array('//', '//')
        )
    );

/**
     * Block hooks
     */

protected function before_parsing() {
        $this->string = htmlspecialchars($this->string, ENT_COMPAT);
        parent::before_parsing();
    }

public function get_section($header, $text, $clean = false) {
        // The requested header is likely to have been passed to htmlspecialchars in
        // self::before_parsing(), therefore we should decode it when looking for it.
        return parent::get_section(htmlspecialchars_decode($header, ENT_COMPAT), $text, $clean);
    }

protected function header_block_rule($match) {
        $num = strlen($match[1]);

$text = trim($match[2]);

$text = preg_replace("/\s*={1,$num}$/im", "", $text);

return $this->generate_header($text, $num);
    }

/**
     * Table generation
     */

protected function table_block_rule($match) {

$rows = explode("\n", $match[0]);
        $table = array();
        foreach($rows as $r) {
            if(empty($r)) {
                continue;
            }
            $rawcells = explode("|", $r);
            $cells = array();

array_shift($rawcells);
            array_pop($rawcells);

foreach($rawcells as $c) {
                if(!empty($c)) {
                    if($c[0] == "=") {
                        $type = 'header';
                        $c = substr($c, 1);
                    }
                    else {
                        $type = 'normal';
                    }
                    $this->rules($c);
                    $cells[] = array($type, $c);
                }
            }
            $table[] = $cells;
        }

return $this->generate_table($table);
    }

protected function paragraph_block_rule($match) {
        $text = $match[1];
        foreach($this->tagrules as $tr) {
            if(isset($tr['token'])) {
                if(is_array($tr['token'])) {
                    $this->escape_token_string($text, $tr['token'][0]);
                    $this->escape_token_string($text, $tr['token'][1]);
                }
                else {
                    $this->escape_token_string($text, $tr['token']);
                }
            }
        }
        $this->escape_token_string($text, "~");

return $text;
    }

/**
     * Escape token when it is "negated"
     */
    private function escape_token_string(&$text, $token) {
        $text = str_replace("~".$token, $this->protect($token), $text);
    }

/**
     * Tag functions
     */

protected function url_tag_rule($match) {
        if(strpos($match[0], "~") === 0) {
            return substr($match[0], 1);
        }
        else {
            $text = trim($match[0]);
            $options = array('href' => $text);

return array($text, $options);
        }
    }

protected function link_tag_rule($match) {
        $text = trim($match[1]);

if(strpos($match[0], "~") === 0) {
            return substr($match[0], 1);
        }
        else {
            return $this->format_link($text);
        }
    }

/**
     * Special treatment of // ** // ** //
     */
    protected function bold_tag_rule($match) {
        $text = $match[1];
        $this->rules($text, array('only' => array('italic')));
        if(strpos($text, "//") !== false) {
            $text = str_replace("//", $this->protect("//"), $text);
        }
        return array($text, array());
    }

protected function image_tag_rule($match) {
        if(strpos($match[0], "~") === 0) {
            return substr($match[0], 1);
        }

return $this->format_image($match[1], $match[2]);
    }
}

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