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   1  <?php
   2  /**
   3   * The space2html filter converts horizontal whitespace to HTML code.
   4   *
   5   * Parameters:
   6   * <pre>
   7   * encode     -- HTML encode the text?  Defaults to false.
   8   * charset    -- Charset of the text.  Defaults to ISO-8859-1.
   9   * encode_all -- Replace all spaces with &nbsp;?  Defaults to false.
  10   * </pre>
  11   *
  12   * $Horde: framework/Text_Filter/Filter/space2html.php,v 1.1.10.5 2006/01/01 21:28:38 jan Exp $
  13   *
  14   * Copyright 2001 Mathieu Arnold <arn_mat@club-internet.fr>
  15   * Copyright 2004-2006 Jan Schneider <jan@horde.org>
  16   *
  17   * See the enclosed file COPYING for license information (LGPL). If you did
  18   * not receive this file, see http://www.fsf.org/copyleft/lgpl.html.
  19   *
  20   * @author  Jan Schneider <jan@horde.org>
  21   * @author  Mathieu Arnold <arn_mat@club-internet.fr>
  22   * @package Horde_Text
  23   */
  24  class Text_Filter_space2html extends Text_Filter {
  25  
  26      /**
  27       * Filter parameters.
  28       *
  29       * @var array
  30       */
  31      var $_params = array('encode' => false,
  32                           'charset' => 'ISO-8859-1',
  33                           'encode_all' => false);
  34  
  35      /**
  36       * Executes any code necessary before applying the filter patterns.
  37       *
  38       * @param string $text  The text before the filtering.
  39       *
  40       * @return string  The modified text.
  41       */
  42      function preProcess($text)
  43      {
  44          if ($this->_params['encode']) {
  45              $text = @htmlspecialchars($text, ENT_COMPAT, $this->_params['charset']);
  46          }
  47          return $text;
  48      }
  49  
  50      /**
  51       * Returns a hash with replace patterns.
  52       *
  53       * @return array  Patterns hash.
  54       */
  55      function getPatterns()
  56      {
  57          $replace = array("\t" => '&nbsp; &nbsp; &nbsp; &nbsp; ',
  58                           '  ' => '&nbsp; ');
  59          return array('replace' => $replace);
  60      }
  61  
  62      /**
  63       * Executes any code necessaray after applying the filter patterns.
  64       *
  65       * @param string $text  The text after the filtering.
  66       *
  67       * @return string  The modified text.
  68       */
  69      function postProcess($text)
  70      {
  71          $text = str_replace('  ', ' &nbsp;', $text);
  72          if ($this->_params['encode_all']) {
  73              $text = str_replace(' ', '&nbsp;', $text);
  74          }
  75          return $text;
  76      }
  77  
  78  }