1 <?php

     2 /**

     3  * Smarty plugin

     4  *

     5  * @package Smarty

     6  * @subpackage PluginsFilter

     7  */

     8 

     9 /**

    10  * Smarty trimwhitespace outputfilter plugin

    11  *

    12  * Trim unnecessary whitespace from HTML markup.

    13  *

    14  * @author   Rodney Rehm

    15  * @param string                   $source input string

    16  * @param Smarty_Internal_Template $smarty Smarty object

    17  * @return string filtered output

    18  * @todo substr_replace() is not overloaded by mbstring.func_overload - so this function might fail!

    19  */

    20 function smarty_outputfilter_trimwhitespace($source, Smarty_Internal_Template $smarty)

    21 {

    22     $store = array();

    23     $_store = 0;

    24     $_offset = 0;

    25 

    26     // Unify Line-Breaks to \n

    27     $source = preg_replace("/\015\012|\015|\012/", "\n", $source);

    28 

    29     // capture Internet Explorer Conditional Comments

    30     if (preg_match_all('#<!--\[[^\]]+\]>.*?<!\[[^\]]+\]-->#is', $source, $matches, PREG_OFFSET_CAPTURE | PREG_SET_ORDER)) {

    31         foreach ($matches as $match) {

    32             $store[] = $match[0][0];

    33             $_length = strlen($match[0][0]);

    34             $replace = '@!@SMARTY:' . $_store . ':SMARTY@!@';

    35             $source = substr_replace($source, $replace, $match[0][1] - $_offset, $_length);

    36 

    37             $_offset += $_length - strlen($replace);

    38             $_store++;

    39         }

    40     }

    41 

    42     // Strip all HTML-Comments

    43     // yes, even the ones in <script> - see http://stackoverflow.com/a/808850/515124

    44     $source = preg_replace( '#<!--.*?-->#ms', '', $source );

    45 

    46     // capture html elements not to be messed with

    47     $_offset = 0;

    48     if (preg_match_all('#<(script|pre|textarea)[^>]*>.*?</\\1>#is', $source, $matches, PREG_OFFSET_CAPTURE | PREG_SET_ORDER)) {

    49         foreach ($matches as $match) {

    50             $store[] = $match[0][0];

    51             $_length = strlen($match[0][0]);

    52             $replace = '@!@SMARTY:' . $_store . ':SMARTY@!@';

    53             $source = substr_replace($source, $replace, $match[0][1] - $_offset, $_length);

    54 

    55             $_offset += $_length - strlen($replace);

    56             $_store++;

    57         }

    58     }

    59 

    60     $expressions = array(

    61         // replace multiple spaces between tags by a single space

    62         // can't remove them entirely, becaue that might break poorly implemented CSS display:inline-block elements

    63         '#(:SMARTY@!@|>)\s+(?=@!@SMARTY:|<)#s' => '\1 \2',

    64         // remove spaces between attributes (but not in attribute values!)

    65         '#(([a-z0-9]\s*=\s*(["\'])[^\3]*?\3)|<[a-z0-9_]+)\s+([a-z/>])#is' => '\1 \4',

    66         // note: for some very weird reason trim() seems to remove spaces inside attributes.

    67         // maybe a \0 byte or something is interfering?

    68         '#^\s+<#Ss' => '<',

    69         '#>\s+$#Ss' => '>',

    70     );

    71 

    72     $source = preg_replace( array_keys($expressions), array_values($expressions), $source );

    73     // note: for some very weird reason trim() seems to remove spaces inside attributes.

    74     // maybe a \0 byte or something is interfering?

    75     // $source = trim( $source );

    76 

    77     // capture html elements not to be messed with

    78     $_offset = 0;

    79     if (preg_match_all('#@!@SMARTY:([0-9]+):SMARTY@!@#is', $source, $matches, PREG_OFFSET_CAPTURE | PREG_SET_ORDER)) {

    80         foreach ($matches as $match) {

    81             $store[] = $match[0][0];

    82             $_length = strlen($match[0][0]);

    83             $replace = array_shift($store);

    84             $source = substr_replace($source, $replace, $match[0][1] + $_offset, $_length);

    85 

    86             $_offset += strlen($replace) - $_length;

    87             $_store++;

    88         }

    89     }

    90 

    91     return $source;

    92 }

    93 

    94 ?>