Xnyo - Sources for file plugins/smarty/function.html

Sources for file plugins/smarty/function.html_image.php in version 2.0

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/*
 * Smarty plugin
 * -------------------------------------------------------------
 * Type:     function
 * Name:     html_image
 * Version:  1.0
 * Date:     Feb 24, 2003
 * Author:     Monte Ohrt <monte@ispi.net>
 * Credits:  Duda <duda@big.hu> - wrote first image function
 *           in repository, helped with lots of functionality
 * Purpose:  format HTML tags for the image
 * Input:    file = file (and path) of image (required)
 *           border = border width (optional, default 0)
 *           height = image height (optional, default actual height)
 *           image =image width (optional, default actual width)
 *           basedir = base directory for absolute paths, default
 *                     is environment variable DOCUMENT_ROOT
 * 
 * Examples: {image file="images/masthead.gif"}
 * Output:   <img src="images/masthead.gif" border=0 width=400 height=23>
 * -------------------------------------------------------------
 */
function smarty_function_html_image($params, &$smarty)
{    
    require_once $smarty->_get_plugin_filepath('shared','escape_special_chars');

    $file = '';
    $border = 0;
    $height = '';
    $width = '';
    $extra = '';
    $prefix = '';
    $suffix = '';
    $basedir = isset($GLOBALS['HTTP_SERVER_VARS']['DOCUMENT_ROOT'])
            ? $GLOBALS['HTTP_SERVER_VARS']['DOCUMENT_ROOT'] : '/';
    if(strstr($GLOBALS['HTTP_SERVER_VARS']['HTTP_USER_AGENT'], 'Mac')) {
        $dpi_default = 72;
    } else {
        $dpi_default = 96;
    }
    
    foreach($params as $_key => $_val) {    
        switch($_key) {
            case 'file':
                $file = $_val;
                break;
            case 'border':
                $border = $_val;
                break;
            case 'height':
                $height = $_val;
                break;
            case 'width':
                $width = $_val;
                break;
            case 'link':
                $prefix = '<a href="' . $_val . '">';
                $suffix = '</a>';
                break;
            case 'dpi':
                $dpi = $_val;
                break;
            default:
                $extra .= ' '.$_key.'="'.smarty_function_escape_special_chars($_val).'"';
                break;                    
        }
    }

    if (empty($file)) {
        $smarty->trigger_error("html_image: missing 'file' parameter", E_USER_NOTICE);
        return;
    }

    if(substr($file,0,1) == DIR_SEP) {
        $_image_path = $basedir . DIR_SEP . $file;
    } else {
        $_image_path = $file;
    }
    
    if(!isset($params['width']) || !isset($params['height'])) {
        if(!$_image_data = @getimagesize($_image_path)) {
            if(!file_exists($_image_path)) {
                $smarty->trigger_error("html_image: unable to find '$_image_path'", E_USER_NOTICE);        
                return;
            } else if(!is_readable($_image_path)) {
                $smarty->trigger_error("html_image: unable to read '$_image_path'", E_USER_NOTICE);        
                return;
            } else {
                $smarty->trigger_error("html_image: '$_image_path' is not a valid image file",
E_USER_NOTICE);
                return;
            }
        }
        if(!$smarty->security && !$smarty->_is_secure('file', $_image_path)) {
            $smarty->trigger_error("html_image: (secure) '$_image_path' not in secure directory",
E_USER_NOTICE);        
            return;
        }    
        
        if(!isset($params['width'])) {
            $width = $_image_data[0];
        }
        if(!isset($params['height'])) {
            $height = $_image_data[1];
        }
        
    }

    if(isset($params['dpi'])) {
        $_resize = $dpi_default/$params['dpi'];
        $width = round($width * $_resize);
        $height = round($height * $_resize);
    }
            
    return $prefix . '<img src="'.$file.'" border="'.$border.'" width="'.$width.'"
height="'.$height.'"'.$extra.' />' . $suffix;
}

/* vim: set expandtab: */

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