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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 https://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++; } } $expressions = array(// replace multiple spaces between tags by a single space // can't remove them entirely, because that might break poorly implemented CSS display:inline-block elements '#(:SMARTY@!@|>)\s+(?=@!@SMARTY:|<)#s' => '\1 \2', // remove spaces between attributes (but not in attribute values!) '#(([a-z0-9]\s*=\s*("[^"]*?")|(\'[^\']*?\'))|<[a-z0-9_]+)\s+([a-z/>])#is' => '\1 \5', // note: for some very weird reason trim() seems to remove spaces inside attributes. // maybe a \0 byte or something is interfering? '#^\s+<#Ss' => '<', '#>\s+$#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; }