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/framework/vendor/smarty2/lib/plugins/function.html_image.php

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PHP | 142 lines | 93 code | 15 blank | 34 comment | 21 complexity | de11daabe07795fe4229b8d0185489dd MD5 | raw file
  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?>