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:  */
 37: function 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: