<?php

use Symfony\Component\VarDumper\Exception\ThrowingCasterException;

 if (!defined('PmWiki')) exit();
/*  Copyright 2005 Ben Wilson (ameen@dausha.net)
    This recipe extends PmWiki; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published
    by the Free Software Foundation; either version 2 of the License,
    provided this copyright statement remains with this recipe. 
    See pmwiki.php for full details.

    This recipe provides very simple markup to allow a page to contain a
    section sub-divided into two columns of equal width, and optionally 
    allows full-width text above and below the two-column section. Note 
    the restriction here is that there can only be one section per page 
    that is broken into columns. The recipe provides exact control so the 

    (:colstart:) -- This markup tag allows the editor to indicate where
    the column block of text begins. All text before this tag will 
    appear above the two-column block.

    (:colend:) -- This markup tag alllows the editor to indicate where
    the columns should end. Any text after this tag will appear after 
    the two-column block.

    (:column:) -- this markup tag tells the recipe where to split the
    two columns. As this recipe does not attempt to calculate where 
    an equidistant split should be, it is up to the editor to decide 
    where. Everything before this tag (not including any text before the
    (:colstart:) tag) will be put into the first column. Everything after
    this tag (not including any text after the (:colend:) tag) will be
    put into the second column.

*/
# Version 1.0
# Version 2.0 generalized by Harco Kuppens for n columns if we have n-1 (:column:) directives


Markup('columns', '_begin',
    '/(.*?)\(:column:\)(.*)$/s',
    "Columnize");

function Columnize($m) {
      $bits = preg_split("/\(:colstart:\)/", $m[1]);
      // when splitting, be carefull pre can be empty
      list($pre, $one) = (count($bits) > 1) ? $bits : array('', $bits[0]);
      $bits = preg_split("/\(:colend:\)/", $m[2]);
      // when splitting, be carefull post can be empty
      list($rest, $post) = (count($bits) > 1) ? $bits : array($bits[0],'');
      
      $bits =explode("(:column:)",$rest);
      $num_columns=count($bits)+1;
      $width=intval(100/$num_columns);
      $cell_sep="(:cell valign=top width=" . $width . "%:)";
      $cel_head="(:cellnr valign=top width=" . $width . "%:)";
      if (count($bits) > 1) {
         // $two=$bits[0];  
          $two=implode($cell_sep, $bits);
      } else {
          $two=$rest;  
      }


      return<<<RETURN
    $pre
    (:table class=columns border=0 cellspacing=0 cellpadding=6:)
    $cel_head
    $one
    $cell_sep
    $two
    (:tableend:)
    $post
    RETURN;
}