includes/wikiengine/Parse/Mediawiki/Table.php
author Dan
Sat, 24 May 2008 23:40:42 -0400
changeset 556 63e131c38876
parent 1 fe660c52c48f
permissions -rw-r--r--
More work done on effective permissions API, namely reporting of page group and usergroup names
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<?php
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// vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4:
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/**
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 * Mediawiki: Parses for tables.
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 *
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 * This class implements a Text_Wiki_Rule to find tables in pipe syntax
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 * {| ... |- ... | ... |}
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 * On parsing, the text itself is left in place, but the starting and ending
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 * tags for table, rows and cells are replaced with tokens. (nested tables enabled)
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 *
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 * PHP versions 4 and 5
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 *
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 * @category   Text
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 * @package    Text_Wiki
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 * @author     Bertrand Gugger <bertrand@toggg.com>
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 * @copyright  2005 bertrand Gugger
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 * @license    http://www.gnu.org/copyleft/lesser.html  LGPL License 2.1
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 * @version    CVS: $Id: Table.php,v 1.7 2005/12/06 15:54:56 ritzmo Exp $
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 * @link       http://pear.php.net/package/Text_Wiki
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 */
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/**
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 * Table rule parser class for Mediawiki.
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 *
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 * @category   Text
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 * @package    Text_Wiki
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 * @author     Bertrand Gugger <bertrand@toggg.com>
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 * @copyright  2005 bertrand Gugger
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 * @license    http://www.gnu.org/copyleft/lesser.html  LGPL License 2.1
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 * @version    Release: @package_version@
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 * @link       http://pear.php.net/package/Text_Wiki
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 * @see        Text_Wiki_Parse::Text_Wiki_Parse()
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 */
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class Text_Wiki_Parse_Table extends Text_Wiki_Parse {
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    /**
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     * The regular expression used to parse the source text and find
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     * matches conforming to this rule.  Used by the parse() method.
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     *
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     * @access public
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     * @var string
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     * @see parse()
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     */
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    var $regex = '#^\{\|(.*?)(?:^\|\+(.*?))?(^(?:((?R))|.)*?)^\|}#msi';
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    /**
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     * The regular expression used in second stage to find table's rows
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     * used by process() to call back processRows()
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     *
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     * @access public
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     * @var string
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     * @see process()
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     * @see processRows()
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     */
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    var $regexRows = '#(?:^(\||!)-|\G)(.*?)^(.*?)(?=^(?:\|-|!-|\z))#msi';
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    /**
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     * The regular expression used in third stage to find rows's cells
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     * used by processRows() to call back processCells()
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     *
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     * @access public
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     * @var string
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     * @see process()
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     * @see processCells()
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     */
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    var $regexCells =
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    '#((?:^\||^!|\|\||!!|\G))(?:([^|\n]*?) \|(?!\|))?(.+?)(?=^\||^!|\|\||!!|\z)#msi';
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    /**
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     * The current table nesting depth, starts by zero
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     *
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     * @access private
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     * @var int
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     */
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    var $_level = 0;
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    /**
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     * The count of rows for this level
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     *
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     * @access private
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     * @var array of int
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     */
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    var $_countRows = array();
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    /**
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     * The max count of cells for this level
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     *
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     * @access private
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     * @var array of int
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     */
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    var $_maxCells = array();
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    /**
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     * The count of cells for each row
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     *
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     * @access private
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     * @var array of int
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     */
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    var $_countCells = array();
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    /**
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     * The count of spanned cells from previous rowspans for each column
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     *
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     * @access private
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     * @var array of int
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     */
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    var $_spanCells = array();
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    /**
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     * Generates a replacement for the matched text. Returned token options are:
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     * 'type' =>
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     *     'table_start'   : the start of a bullet list
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     *     'table_end'     : the end of a bullet list
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     *     'row_start'     : the start of a number list
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     *     'row_end'       : the end of a number list
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     *     'cell_start'    : the start of item text (bullet or number)
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     *     'cell_end'      : the end of item text (bullet or number)
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     *     'caption_start' : the start of associated caption
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     *     'caption_end'   : the end of associated caption
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     *
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     * 'level' => the table nesting level (starting zero) ('table_start')
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     *
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     * 'rows' => the number of rows in the table ('table_start')
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     *
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     * 'cols' => the number of columns in the table or rows
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     *           ('table_start' and 'row_start')
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     *
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     * 'span' => column span ('cell_start')
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     *
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     * 'row_span' => row span ('cell_start')
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     *
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     * 'attr' => header optional attribute flag ('row_start' or 'cell_start')
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     *
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     * 'format' => table, row or cell optional styling ('xxx_start')
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     *
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     * @param array &$matches The array of matches from parse().
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     * @return string the original text with tags replaced by delimited tokens
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     * which point to the the token array containing their type and definition
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     * @access public
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     */
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    function process(&$matches)
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    {
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        if (array_key_exists(4, $matches)) {
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            $this->_level++;
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            $expsub = preg_replace_callback(
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                $this->regex,
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                array(&$this, 'process'),
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                $matches[3]
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            );
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            $this->_level--;
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        } else {
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            $expsub = $matches[3];
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        }
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        $this->_countRows[$this->_level] = $this->_maxCells[$this->_level] = 0;
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        $this->_countCells[$this->_level] = $this->_spanCells[$this->_level] = array();
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        $sub = preg_replace_callback(
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            $this->regexRows,
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            array(&$this, 'processRows'),
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            $expsub
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        );
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        $param = array(
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                'type'  => 'table_start',
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                'level' => $this->_level,
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                'rows' => $this->_countRows[$this->_level],
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                'cols' => $this->_maxCells[$this->_level]
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        );
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        if ($format = trim($matches[1])) {
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            $param['format'] = $format;
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        }
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        $ret = $this->wiki->addToken($this->rule, $param );
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        if ($matches[2]) {
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            $ret .= $this->wiki->addToken($this->rule, array(
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                'type'  => 'caption_start',
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                'level' => $this->_level ) ) . $matches[2] .
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                    $this->wiki->addToken($this->rule, array(
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                'type'  => 'caption_end',
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                'level' => $this->_level ) );
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        }
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        $param['type'] = 'table_end';
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        return $ret . $sub . $this->wiki->addToken($this->rule, $param );
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    }
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    /**
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     * Generates a replacement for the matched rows. Token options are:
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     * 'type' =>
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     *     'row_start'   : the start of a row
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     *     'row_end'     : the end of a row
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     *
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     * 'order' => the row order in the table
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     *
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     * 'cols' => the count of cells in the row
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     *
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     * 'attr' => header optional attribute flag
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     *
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     * 'format' => row optional styling
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     *
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     * @param array &$matches The array of matches from process() callback.
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     * @return string 2 delimited tokens pointing the row params
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     * and containing the cells-parsed block of text between the tags
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     * @access public
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     */
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    function processRows(&$matches)
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    {
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        $this->_countCells[$this->_level][$this->_countRows[$this->_level]] = 0;
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        $sub = preg_replace_callback(
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            $this->regexCells,
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            array(&$this, 'processCells'),
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            $matches[3]
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        );
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        $param = array(
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                'type'  => 'row_start',
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                'order' => $this->_countRows[$this->_level],
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                'cols' => $this->_countCells[$this->_level][$this->_countRows[$this->_level]++]
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        );
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        if ($matches[1] == '!') {
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            $param['attr'] = 'header';
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        }
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        if ($format = trim($matches[2])) {
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            $param['format'] = $format;
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        }
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        if ($this->_maxCells[$this->_level] < $param['cols']) {
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            $this->_maxCells[$this->_level] = $param['cols'];
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        }
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        $ret = $this->wiki->addToken($this->rule, $param );
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        $param['type'] = 'row_end';
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        return $ret . $sub . $this->wiki->addToken($this->rule, $param );
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    }
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    /**
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     * Generates a replacement for the matched cells. Token options are:
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     * 'type' =>
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     *     'cell_start'   : the start of a row
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     *     'cell_end'     : the end of a row
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     *
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     * 'order' => the cell order in the row
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     *
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     * 'cols' => the count of cells in the row
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     *
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     * 'span' => column span
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     *
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     * 'row_span' => row span
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     *
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     * 'attr' => header optional attribute flag
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     *
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     * 'format' => cell optional styling
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     *
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     * @param array &$matches The array of matches from processRows() callback.
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     * @return string 2 delimited tokens pointing the cell params
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     * and containing the block of text between the tags
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     * @access public
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diff changeset
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     */
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    function processCells(&$matches)
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    {
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        $order = & $this->_countCells[$this->_level][$this->_countRows[$this->_level]];
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        while (isset($this->_spanCells[$this->_level][$order])) {
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diff changeset
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            if (--$this->_spanCells[$this->_level][$order] < 2) {
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                unset($this->_spanCells[$this->_level][$order]);
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            }
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            $order++;
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        }
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        $param = array(
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                'type'  => 'cell_start',
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                'attr'  => $matches[1] && ($matches[1]{0} == '!') ? 'header': null,
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diff changeset
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                'span'  => 1,
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diff changeset
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                'rowspan'  => 1,
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                'order' => $order
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        );
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        if ($format = trim($matches[2])) {
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            if (preg_match('#(.*)colspan=("|\')?(\d+)(?(2)\2)(.*)#i', $format, $pieces)) {
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                $param['span'] = (int)$pieces[3];
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                $format = $pieces[1] . $pieces[4];
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            }
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            if (preg_match('#(.*)rowspan=("|\')?(\d+)(?(2)\2)(.*)#i', $format, $pieces)) {
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                $this->_spanCells[$this->_level][$order] =
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                                    $param['rowspan'] = (int)$pieces[3];
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                $format = $pieces[1] . $pieces[4];
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            }
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            $param['format'] = $format;
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        }
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        $this->_countCells[$this->_level][$this->_countRows[$this->_level]] += $param['span'];
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        $ret = $this->wiki->addToken($this->rule, $param);
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        $param['type'] = 'cell_end';
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        return $ret . $matches[3] . $this->wiki->addToken($this->rule, $param );
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    }
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}
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?>