/#/vendor/smarty/plugins/outputfilter.trimwhitespace.php
PHP | 93 lines | 50 code | 13 blank | 30 comment | 3 complexity | 9d32d6eea2817433c313b66541ffaa31 MD5 | raw file
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 $smarty Smarty object
17 * @return string filtered output
18 * @todo substr_replace() is not overloaded by mbstring.func_overload - so this function might fail!
19 */
20function smarty_outputfilter_trimwhitespace($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 $source = preg_replace( '#<!--.*?-->#ms', '', $source );
44
45 // capture html elements not to be messed with
46 $_offset = 0;
47 if (preg_match_all('#<(script|pre|textarea)[^>]*>.*?</\\1>#is', $source, $matches, PREG_OFFSET_CAPTURE | PREG_SET_ORDER)) {
48 foreach ($matches as $match) {
49 $store[] = $match[0][0];
50 $_length = strlen($match[0][0]);
51 $replace = '@!@SMARTY:' . $_store . ':SMARTY@!@';
52 $source = substr_replace($source, $replace, $match[0][1] - $_offset, $_length);
53
54 $_offset += $_length - strlen($replace);
55 $_store++;
56 }
57 }
58
59 $expressions = array(
60 // replace multiple spaces between tags by a single space
61 // can't remove them entirely, becaue that might break poorly implemented CSS display:inline-block elements
62 '#(:SMARTY@!@|>)\s+(?=@!@SMARTY:|<)#s' => '\1 \2',
63 // remove spaces between attributes (but not in attribute values!)
64 '#(([a-z0-9]\s*=\s*(["\'])[^\3]*?\3)|<[a-z0-9_]+)\s+([a-z/>])#is' => '\1 \4',
65 // note: for some very weird reason trim() seems to remove spaces inside attributes.
66 // maybe a \0 byte or something is interfering?
67 '#^\s+<#Ss' => '<',
68 '#>\s+$#Ss' => '>',
69 );
70
71 $source = preg_replace( array_keys($expressions), array_values($expressions), $source );
72 // note: for some very weird reason trim() seems to remove spaces inside attributes.
73 // maybe a \0 byte or something is interfering?
74 // $source = trim( $source );
75
76 // capture html elements not to be messed with
77 $_offset = 0;
78 if (preg_match_all('#@!@SMARTY:([0-9]+):SMARTY@!@#is', $source, $matches, PREG_OFFSET_CAPTURE | PREG_SET_ORDER)) {
79 foreach ($matches as $match) {
80 $store[] = $match[0][0];
81 $_length = strlen($match[0][0]);
82 $replace = array_shift($store);
83 $source = substr_replace($source, $replace, $match[0][1] + $_offset, $_length);
84
85 $_offset += strlen($replace) - $_length;
86 $_store++;
87 }
88 }
89
90 return $source;
91}
92
93?>