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- <?php
- /**
- * Smarty plugin
- *
- * @package Smarty
- * @subpackage PluginsFilter
- */
-
- /**
- * Smarty trimwhitespace outputfilter plugin
- * Trim unnecessary whitespace from HTML markup.
- *
- * @author Rodney Rehm
- *
- * @param string $source input string
- *
- * @return string filtered output
- * @todo substr_replace() is not overloaded by mbstring.func_overload - so this function might fail!
- */
- function smarty_outputfilter_trimwhitespace($source)
- {
- $store = array();
- $_store = 0;
- $_offset = 0;
-
- // Unify Line-Breaks to \n
- $source = preg_replace('/\015\012|\015|\012/', "\n", $source);
-
- // capture Internet Explorer and KnockoutJS Conditional Comments
- if (preg_match_all('#<!--((\[[^\]]+\]>.*?<!\[[^\]]+\])|(\s*/?ko\s+.+))-->#is', $source, $matches,
- PREG_OFFSET_CAPTURE | PREG_SET_ORDER)) {
- foreach ($matches as $match) {
- $store[] = $match[ 0 ][ 0 ];
- $_length = strlen($match[ 0 ][ 0 ]);
- $replace = '@!@SMARTY:' . $_store . ':SMARTY@!@';
- $source = substr_replace($source, $replace, $match[ 0 ][ 1 ] - $_offset, $_length);
-
- $_offset += $_length - strlen($replace);
- $_store ++;
- }
- }
-
- // Strip all HTML-Comments
- // yes, even the ones in <script> - see http://stackoverflow.com/a/808850/515124
- $source = preg_replace('#<!--.*?-->#ms', '', $source);
-
- // capture html elements not to be messed with
- $_offset = 0;
- if (preg_match_all('#(<script[^>]*>.*?</script[^>]*>)|(<textarea[^>]*>.*?</textarea[^>]*>)|(<pre[^>]*>.*?</pre[^>]*>)#is',
- $source, $matches, PREG_OFFSET_CAPTURE | PREG_SET_ORDER)) {
- foreach ($matches as $match) {
- $store[] = $match[ 0 ][ 0 ];
- $_length = strlen($match[ 0 ][ 0 ]);
- $replace = '@!@SMARTY:' . $_store . ':SMARTY@!@';
- $source = substr_replace($source, $replace, $match[ 0 ][ 1 ] - $_offset, $_length);
-
- $_offset += $_length - strlen($replace);
- $_store ++;
- }
- }
-
- $expressions = array(// replace multiple spaces between tags by a single space
- // can't remove them entirely, becaue that might break poorly implemented CSS display:inline-block elements
- '#(:SMARTY@!@|>)\s+(?=@!@SMARTY:|<)#s' => '\1 \2',
- // remove spaces between attributes (but not in attribute values!)
- '#(([a-z0-9]\s*=\s*("[^"]*?")|(\'[^\']*?\'))|<[a-z0-9_]+)\s+([a-z/>])#is' => '\1 \5',
- // note: for some very weird reason trim() seems to remove spaces inside attributes.
- // maybe a \0 byte or something is interfering?
- '#^\s+<#Ss' => '<', '#>\s+$#Ss' => '>',);
-
- $source = preg_replace(array_keys($expressions), array_values($expressions), $source);
- // note: for some very weird reason trim() seems to remove spaces inside attributes.
- // maybe a \0 byte or something is interfering?
- // $source = trim( $source );
-
- $_offset = 0;
- if (preg_match_all('#@!@SMARTY:([0-9]+):SMARTY@!@#is', $source, $matches, PREG_OFFSET_CAPTURE | PREG_SET_ORDER)) {
- foreach ($matches as $match) {
- $_length = strlen($match[ 0 ][ 0 ]);
- $replace = $store[ $match[ 1 ][ 0 ] ];
- $source = substr_replace($source, $replace, $match[ 0 ][ 1 ] + $_offset, $_length);
-
- $_offset += strlen($replace) - $_length;
- $_store ++;
- }
- }
-
- return $source;
- }
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