/#/vendor/smarty/plugins/outputfilter.trimwhitespace.php

 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?>