1: <?php
2: /*
3: You may not change or alter any portion of this comment or credits
4: of supporting developers from this source code or any supporting source code
5: which is considered copyrighted (c) material of the original comment or credit authors.
6:
7: This program is distributed in the hope that it will be useful,
8: but WITHOUT ANY WARRANTY; without even the implied warranty of
9: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
10: */
11:
12: namespace Xoops\Core\Text\Sanitizer\Extensions;
13:
14: use Xoops\Core\Text\Sanitizer;
15: use Xoops\Core\Text\Sanitizer\FilterAbstract;
16:
17: /**
18: * TextSanitizer filter
19: *
20: * @category Sanitizer
21: * @package Xoops\Core\Text
22: * @author Taiwen Jiang <phppp@users.sourceforge.net>
23: * @copyright 2000-2015 XOOPS Project (http://xoops.org)
24: * @license GNU GPL 2 (http://www.gnu.org/licenses/gpl-2.0.html)
25: * @link http://xoops.org
26: */
27: class SyntaxHighlight extends FilterAbstract
28: {
29: /**
30: * @var array default configuration values
31: */
32: protected static $defaultConfiguration = [
33: 'enabled' => false,
34: 'highlighter' => 'php', // Source code highlight: '' - disable; 'php' - php highlight; 'geshi' - geshi highlight
35: 'language' => 'PHP'
36: ];
37:
38: /**
39: * apply syntax highlighting to a text string
40: *
41: * @param string $source source code text to highlight
42: * @param string $language of source code
43: *
44: * @return bool|mixed|string
45: */
46: public function applyFilter($source, $language = 'php')
47: {
48: $config = $this->config;
49: if (empty($config['highlighter'])) {
50: return "<pre>{$source}</pre>";
51: }
52: $source = $this->ts->undoHtmlSpecialChars($source);
53: $source = stripslashes($source);
54: if ($config['highlighter'] === 'geshi') {
55: $language = str_replace('=', '', $language);
56: $language = ($language) ? $language : $config['language'];
57: $language = strtolower($language);
58: if ($source2 = SyntaxHighlight::geshi($source, $language)) {
59: return $source2;
60: }
61: }
62: $source = SyntaxHighlight::php($source);
63: return $source;
64: }
65:
66: /**
67: * apply PHP highlight_string
68: *
69: * @param string $text source string
70: *
71: * @return string
72: */
73: public function php($text)
74: {
75: $text = trim($text);
76: $addedOpenTag = false;
77: if (!strpos($text, "<?php") && (substr($text, 0, 5) !== "<?php")) {
78: $text = "<?php " . $text;
79: $addedOpenTag = true;
80: }
81:
82: $oldlevel = error_reporting(0);
83:
84: //There is a bug in the highlight function(php < 5.3) that it doesn't render
85: //backslashes properly like in \s. So here we replace any backslashes
86: $text = str_replace("\\", "XxxX", $text);
87:
88: $buffer = highlight_string($text, true); // Require PHP 4.20+
89:
90: //Placing backspaces back again
91: $buffer = str_replace("XxxX", "\\", $buffer);
92:
93: error_reporting($oldlevel);
94: $pos_open = $pos_close = 0;
95: if ($addedOpenTag) {
96: $pos_open = strpos($buffer, '<?php ');
97: }
98:
99: $str_open = ($addedOpenTag) ? substr($buffer, 0, $pos_open) : "";
100:
101: $length_open = ($addedOpenTag) ? $pos_open + 14 : 0;
102: $str_internal = substr($buffer, $length_open);
103:
104: $buffer = $str_open . $str_internal;
105: return $buffer;
106: }
107:
108: /**
109: * apply geshi highlighting
110: *
111: * @param string $source source code text to highlight
112: * @param string $language of source code
113: *
114: * @return bool
115: */
116: public function geshi($source, $language)
117: {
118: if (!@\XoopsLoad::load("geshi", "framework")) {
119: return false;
120: }
121:
122: // Create the new XoopsGeshi object, passing relevant stuff
123: // XoopsGeshi should be extending geSHi in Frameworks/geshi/xoopsgeshi.php
124: $geshi = new XoopsGeshi($source, $language);
125:
126: // Enclose the code in a <div>
127: $geshi->set_header_type(GESHI_HEADER_NONE);
128:
129: // Sets the proper encoding charset other than "ISO-8859-1"
130: $geshi->set_encoding(\XoopsLocale::getCharset());
131:
132: $geshi->set_link_target("_blank");
133:
134: // Parse the code
135: $code = $geshi->parse_code();
136:
137: return $code;
138: }
139: }
140: