[Sommaire] [Imprimer]

   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  ?>