1 | <?php
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2 | /**
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3 | * Smarty plugin
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4 | * @package Smarty
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5 | * @subpackage plugins
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6 | */
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7 |
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8 |
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9 | /**
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10 | * Smarty {html_image} function plugin
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11 | *
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12 | * Type: function<br>
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13 | * Name: html_image<br>
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14 | * Date: Feb 24, 2003<br>
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15 | * Purpose: format HTML tags for the image<br>
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16 | * Input:<br>
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17 | * - file = file (and path) of image (required)
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18 | * - height = image height (optional, default actual height)
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19 | * - width = image width (optional, default actual width)
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20 | * - basedir = base directory for absolute paths, default
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21 | * is environment variable DOCUMENT_ROOT
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22 | * - path_prefix = prefix for path output (optional, default empty)
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23 | *
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24 | * Examples: {html_image file="/images/masthead.gif"}
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25 | * Output: <img src="/images/masthead.gif" width=400 height=23>
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26 | * @link http://smarty.php.net/manual/en/language.function.html.image.php {html_image}
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27 | * (Smarty online manual)
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28 | * @author Monte Ohrt <monte at ohrt dot com>
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29 | * @author credits to Duda <duda@big.hu> - wrote first image function
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30 | * in repository, helped with lots of functionality
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31 | * @version 1.0
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32 | * @param array
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33 | * @param Smarty
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34 | * @return string
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35 | * @uses smarty_function_escape_special_chars()
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36 | */
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37 | function smarty_function_html_image($params, &$smarty)
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38 | {
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39 | require_once $smarty->_get_plugin_filepath('shared','escape_special_chars');
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40 |
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41 | $alt = '';
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42 | $file = '';
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43 | $height = '';
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44 | $width = '';
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45 | $extra = '';
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46 | $prefix = '';
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47 | $suffix = '';
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48 | $path_prefix = '';
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49 | $server_vars = ($smarty->request_use_auto_globals) ? $_SERVER : $GLOBALS['HTTP_SERVER_VARS'];
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50 | $basedir = isset($server_vars['DOCUMENT_ROOT']) ? $server_vars['DOCUMENT_ROOT'] : '';
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51 | foreach($params as $_key => $_val) {
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52 | switch($_key) {
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53 | case 'file':
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54 | case 'height':
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55 | case 'width':
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56 | case 'dpi':
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57 | case 'path_prefix':
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58 | case 'basedir':
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59 | $$_key = $_val;
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60 | break;
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61 |
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62 | case 'alt':
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63 | if(!is_array($_val)) {
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64 | $$_key = smarty_function_escape_special_chars($_val);
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65 | } else {
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66 | $smarty->trigger_error("html_image: extra attribute '$_key' cannot be an array", E_USER_NOTICE);
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67 | }
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68 | break;
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69 |
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70 | case 'link':
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71 | case 'href':
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72 | $prefix = '<a href="' . $_val . '">';
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73 | $suffix = '</a>';
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74 | break;
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75 |
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76 | default:
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77 | if(!is_array($_val)) {
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78 | $extra .= ' '.$_key.'="'.smarty_function_escape_special_chars($_val).'"';
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79 | } else {
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80 | $smarty->trigger_error("html_image: extra attribute '$_key' cannot be an array", E_USER_NOTICE);
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81 | }
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82 | break;
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83 | }
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84 | }
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85 |
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86 | if (empty($file)) {
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87 | $smarty->trigger_error("html_image: missing 'file' parameter", E_USER_NOTICE);
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88 | return;
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89 | }
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90 |
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91 | if (substr($file,0,1) == '/') {
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92 | $_image_path = $basedir . $file;
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93 | } else {
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94 | $_image_path = $file;
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95 | }
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96 |
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97 | if(!isset($params['width']) || !isset($params['height'])) {
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98 | if(!$_image_data = @getimagesize($_image_path)) {
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99 | if(!file_exists($_image_path)) {
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100 | $smarty->trigger_error("html_image: unable to find '$_image_path'", E_USER_NOTICE);
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101 | return;
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102 | } else if(!is_readable($_image_path)) {
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103 | $smarty->trigger_error("html_image: unable to read '$_image_path'", E_USER_NOTICE);
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104 | return;
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105 | } else {
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106 | $smarty->trigger_error("html_image: '$_image_path' is not a valid image file", E_USER_NOTICE);
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107 | return;
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108 | }
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109 | }
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110 | if ($smarty->security &&
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111 | ($_params = array('resource_type' => 'file', 'resource_name' => $_image_path)) &&
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112 | (require_once(SMARTY_CORE_DIR . 'core.is_secure.php')) &&
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113 | (!smarty_core_is_secure($_params, $smarty)) ) {
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114 | $smarty->trigger_error("html_image: (secure) '$_image_path' not in secure directory", E_USER_NOTICE);
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115 | }
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116 |
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117 | if(!isset($params['width'])) {
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118 | $width = $_image_data[0];
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119 | }
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120 | if(!isset($params['height'])) {
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121 | $height = $_image_data[1];
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122 | }
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123 |
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124 | }
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125 |
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126 | if(isset($params['dpi'])) {
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127 | if(strstr($server_vars['HTTP_USER_AGENT'], 'Mac')) {
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128 | $dpi_default = 72;
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129 | } else {
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130 | $dpi_default = 96;
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131 | }
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132 | $_resize = $dpi_default/$params['dpi'];
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133 | $width = round($width * $_resize);
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134 | $height = round($height * $_resize);
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135 | }
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136 |
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137 | return $prefix . '<img src="'.$path_prefix.$file.'" alt="'.$alt.'" width="'.$width.'" height="'.$height.'"'.$extra.' />' . $suffix;
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138 | }
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139 |
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140 | /* vim: set expandtab: */
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141 |
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142 | ?>
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