1<?php
2/**
3 * Smarty plugin
4 * @package Smarty
5 * @subpackage plugins
6 */
7
8
9/**
10 * Smarty {html_image} function plugin
11 *
12 * Type:     function<br>
13 * Name:     html_image<br>
14 * Date:     Feb 24, 2003<br>
15 * Purpose:  format HTML tags for the image<br>
16 * Input:<br>
17 *         - file = file (and path) of image (required)
18 *         - height = image height (optional, default actual height)
19 *         - width = image width (optional, default actual width)
20 *         - basedir = base directory for absolute paths, default
21 *                     is environment variable DOCUMENT_ROOT
22 *         - path_prefix = prefix for path output (optional, default empty)
23 *
24 * Examples: {html_image file="/images/masthead.gif"}
25 * Output:   <img src="/images/masthead.gif" width=400 height=23>
26 * @link http://smarty.php.net/manual/en/language.function.html.image.php {html_image}
27 *      (Smarty online manual)
28 * @author   Monte Ohrt <monte at ohrt dot com>
29 * @author credits to Duda <duda@big.hu> - wrote first image function
30 *           in repository, helped with lots of functionality
31 * @version  1.0
32 * @param array
33 * @param Smarty
34 * @return string
35 * @uses smarty_function_escape_special_chars()
36 */
37function smarty_function_html_image($params, &$smarty)
38{
39    require_once $smarty->_get_plugin_filepath('shared','escape_special_chars');
40
41    $alt = '';
42    $file = '';
43    $height = '';
44    $width = '';
45    $extra = '';
46    $prefix = '';
47    $suffix = '';
48    $path_prefix = '';
49    $server_vars = ($smarty->request_use_auto_globals) ? $_SERVER : $GLOBALS['HTTP_SERVER_VARS'];
50    $basedir = isset($server_vars['DOCUMENT_ROOT']) ? $server_vars['DOCUMENT_ROOT'] : '';
51    foreach($params as $_key => $_val) {
52        switch($_key) {
53            case 'file':
54            case 'height':
55            case 'width':
56            case 'dpi':
57            case 'path_prefix':
58            case 'basedir':
59                $$_key = $_val;
60                break;
61
62            case 'alt':
63                if(!is_array($_val)) {
64                    $$_key = smarty_function_escape_special_chars($_val);
65                } else {
66                    $smarty->trigger_error("html_image: extra attribute '$_key' cannot be an array", E_USER_NOTICE);
67                }
68                break;
69
70            case 'link':
71            case 'href':
72                $prefix = '<a href="' . $_val . '">';
73                $suffix = '</a>';
74                break;
75
76            default:
77                if(!is_array($_val)) {
78                    $extra .= ' '.$_key.'="'.smarty_function_escape_special_chars($_val).'"';
79                } else {
80                    $smarty->trigger_error("html_image: extra attribute '$_key' cannot be an array", E_USER_NOTICE);
81                }
82                break;
83        }
84    }
85
86    if (empty($file)) {
87        $smarty->trigger_error("html_image: missing 'file' parameter", E_USER_NOTICE);
88        return;
89    }
90
91    if (substr($file,0,1) == '/') {
92        $_image_path = $basedir . $file;
93    } else {
94        $_image_path = $file;
95    }
96
97    if(!isset($params['width']) || !isset($params['height'])) {
98        if(!$_image_data = @getimagesize($_image_path)) {
99            if(!file_exists($_image_path)) {
100                $smarty->trigger_error("html_image: unable to find '$_image_path'", E_USER_NOTICE);
101                return;
102            } else if(!is_readable($_image_path)) {
103                $smarty->trigger_error("html_image: unable to read '$_image_path'", E_USER_NOTICE);
104                return;
105            } else {
106                $smarty->trigger_error("html_image: '$_image_path' is not a valid image file", E_USER_NOTICE);
107                return;
108            }
109        }
110        if ($smarty->security &&
111            ($_params = array('resource_type' => 'file', 'resource_name' => $_image_path)) &&
112            (require_once(SMARTY_CORE_DIR . 'core.is_secure.php')) &&
113            (!smarty_core_is_secure($_params, $smarty)) ) {
114            $smarty->trigger_error("html_image: (secure) '$_image_path' not in secure directory", E_USER_NOTICE);
115        }
116
117        if(!isset($params['width'])) {
118            $width = $_image_data[0];
119        }
120        if(!isset($params['height'])) {
121            $height = $_image_data[1];
122        }
123
124    }
125
126    if(isset($params['dpi'])) {
127        if(strstr($server_vars['HTTP_USER_AGENT'], 'Mac')) {
128            $dpi_default = 72;
129        } else {
130            $dpi_default = 96;
131        }
132        $_resize = $dpi_default/$params['dpi'];
133        $width = round($width * $_resize);
134        $height = round($height * $_resize);
135    }
136
137    return $prefix . '<img src="'.$path_prefix.$file.'" alt="'.$alt.'" width="'.$width.'" height="'.$height.'"'.$extra.' />' . $suffix;
138}
139
140/* vim: set expandtab: */
141
142?>
143