library/smarty/plugins/function.html_image.php

   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 ?>