library/plugins/outputfilter.trimwhitespace.php

   1 <?php
   2 /**
   3  * Smarty plugin
   4  * @package Smarty
   5  * @subpackage plugins
   6  */
   7
   8 /**
   9  * Smarty trimwhitespace outputfilter plugin
  10  *
  11  * File:     outputfilter.trimwhitespace.php<br>
  12  * Type:     outputfilter<br>
  13  * Name:     trimwhitespace<br>
  14  * Date:     Jan 25, 2003<br>
  15  * Purpose:  trim leading white space and blank lines from
  16  *           template source after it gets interpreted, cleaning
  17  *           up code and saving bandwidth. Does not affect
  18  *           <<PRE>></PRE> and <SCRIPT></SCRIPT> blocks.<br>
  19  * Install:  Drop into the plugin directory, call
  20  *           <code>$smarty->load_filter('output','trimwhitespace');</code>
  21  *           from application.
  22  * @author   Monte Ohrt <monte@ispi.net>
  23  * @author Contributions from Lars Noschinski <lars@usenet.noschinski.de>
  24  * @version  1.3
  25  * @param string
  26  * @param Smarty
  27  */
  28 function smarty_outputfilter_trimwhitespace($source, &$smarty)
  29 {
  30     // Pull out the script blocks
  31     preg_match_all("!<script[^>]+>.*?</script>!is", $source, $match);
  32     $_script_blocks = $match[0];
  33     $source = preg_replace("!<script[^>]+>.*?</script>!is",
  34                            '@@@SMARTY:TRIM:SCRIPT@@@', $source);
  35
  36     // Pull out the pre blocks
  37     preg_match_all("!<pre>.*?</pre>!is", $source, $match);
  38     $_pre_blocks = $match[0];
  39     $source = preg_replace("!<pre>.*?</pre>!is",
  40                            '@@@SMARTY:TRIM:PRE@@@', $source);
  41
  42     // Pull out the textarea blocks
  43     preg_match_all("!<textarea[^>]+>.*?</textarea>!is", $source, $match);
  44     $_textarea_blocks = $match[0];
  45     $source = preg_replace("!<textarea[^>]+>.*?</textarea>!is",
  46                            '@@@SMARTY:TRIM:TEXTAREA@@@', $source);
  47
  48     // remove all leading spaces, tabs and carriage returns NOT
  49     // preceeded by a php close tag.
  50     $source = trim(preg_replace('/((?<!\?>)\n)[\s]+/m', '\1', $source));
  51
  52     // replace script blocks
  53     smarty_outputfilter_trimwhitespace_replace("@@@SMARTY:TRIM:SCRIPT@@@",$_script_blocks, $source);
  54
  55     // replace pre blocks
  56     smarty_outputfilter_trimwhitespace_replace("@@@SMARTY:TRIM:PRE@@@",$_pre_blocks, $source);
  57
  58     // replace textarea blocks
  59     smarty_outputfilter_trimwhitespace_replace("@@@SMARTY:TRIM:TEXTAREA@@@",$_textarea_blocks, $source);
  60
  61     return $source;
  62 }
  63
  64 function smarty_outputfilter_trimwhitespace_replace($search_str, $replace, &$subject) {
  65     $_len = strlen($search_str);
  66     $_pos = 0;
  67     for ($_i=0, $_count=count($replace); $_i<$_count; $_i++)
  68         if (($_pos=strpos($subject, $search_str, $_pos))!==false)
  69             $subject = substr_replace($subject, $replace[$_i], $_pos, $_len);
  70         else
  71             break;
  72
  73 }
  74
  75 ?>