<?php
// $Id$

/**
 * @file
 * A module that will remove excess white spaces to save space in the database while increasing download times.
 */

/**
 * Implementation of hook_filter().
 */
function whitespacefilter_filter($op, $delta = 0, $format = -1, $text= '') {
  switch ($op) {
    case 'list':
      return array(0 => t('White Space Filter'));

    case 'description':
      return t('Strips all duplicate whitespaces (tabs, CR, LF and spaces) from user html source and replaces them with a single space.');

    case 'settings':
      break;

    case 'no cache':
      return FALSE;

    case 'prepare':
      return $text;

    case 'process':
      $pat[0] = "/^\s+/";
      $pat[1] = "/\s{2,}/";
      $pat[2] = "/\s+\$/";
      $rep[0] = "";
      $rep[1] = " ";
      $rep[2] = "";
      return preg_replace($pat, $rep, $text);

    default: 
      return $text;
  }
}