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1 <?php |
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2 /** |
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3 * Smarty plugin |
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4 * |
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5 * @package Smarty |
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6 * @subpackage PluginsFunction |
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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 * Type: function<br> |
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12 * Name: html_image<br> |
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13 * Date: Feb 24, 2003<br> |
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14 * Purpose: format HTML tags for the image<br> |
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15 * Examples: {html_image file="/images/masthead.gif"}<br> |
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16 * Output: <img src="/images/masthead.gif" width=400 height=23><br> |
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17 * Params: |
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18 * <pre> |
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19 * - file - (required) - file (and path) of image |
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20 * - height - (optional) - image height (default actual height) |
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21 * - width - (optional) - image width (default actual width) |
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22 * - basedir - (optional) - base directory for absolute paths, default is environment variable DOCUMENT_ROOT |
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23 * - path_prefix - prefix for path output (optional, default empty) |
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24 * </pre> |
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25 * |
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26 * @link http://www.smarty.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> |
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30 * @version 1.0 |
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31 * |
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32 * @param array $params parameters |
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33 * @param Smarty_Internal_Template $template template object |
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34 * |
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35 * @throws SmartyException |
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36 * @return string |
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37 * @uses smarty_function_escape_special_chars() |
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38 */ |
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39 function smarty_function_html_image($params, $template) { |
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40 require_once(SMARTY_PLUGINS_DIR . 'shared.escape_special_chars.php'); |
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41 |
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42 $alt = ''; |
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43 $file = ''; |
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44 $height = ''; |
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45 $width = ''; |
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46 $extra = ''; |
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47 $prefix = ''; |
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48 $suffix = ''; |
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49 $path_prefix = ''; |
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50 $basedir = isset($_SERVER['DOCUMENT_ROOT']) ? $_SERVER['DOCUMENT_ROOT'] : ''; |
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51 foreach ($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($_val); |
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65 } else { |
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66 throw new SmartyException ("html_image: extra attribute '$_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 throw new SmartyException ("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 trigger_error("html_image: missing 'file' parameter", E_USER_NOTICE); |
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88 |
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89 return; |
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90 } |
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91 |
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92 if ($file[0] == '/') { |
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93 $_image_path = $basedir . $file; |
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94 } else { |
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95 $_image_path = $file; |
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96 } |
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97 |
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98 // strip file protocol |
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99 if (stripos($params['file'], 'file://') === 0) { |
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100 $params['file'] = substr($params['file'], 7); |
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101 } |
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102 |
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103 $protocol = strpos($params['file'], '://'); |
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104 if ($protocol !== false) { |
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105 $protocol = strtolower(substr($params['file'], 0, $protocol)); |
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106 } |
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107 |
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108 if (isset($template->smarty->security_policy)) { |
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109 if ($protocol) { |
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110 // remote resource (or php stream, …) |
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111 if (!$template->smarty->security_policy->isTrustedUri($params['file'])) { |
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112 return; |
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113 } |
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114 } else { |
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115 // local file |
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116 if (!$template->smarty->security_policy->isTrustedResourceDir($_image_path)) { |
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117 return; |
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118 } |
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119 } |
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120 } |
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121 |
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122 if (!isset($params['width']) || !isset($params['height'])) { |
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123 // FIXME: (rodneyrehm) getimagesize() loads the complete file off a remote resource, use custom [jpg,png,gif]header reader! |
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124 if (!$_image_data = @getimagesize($_image_path)) { |
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125 if (!file_exists($_image_path)) { |
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126 trigger_error("html_image: unable to find '$_image_path'", E_USER_NOTICE); |
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127 |
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128 return; |
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129 } elseif (!is_readable($_image_path)) { |
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130 trigger_error("html_image: unable to read '$_image_path'", E_USER_NOTICE); |
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131 |
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132 return; |
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133 } else { |
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134 trigger_error("html_image: '$_image_path' is not a valid image file", E_USER_NOTICE); |
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135 |
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136 return; |
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137 } |
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138 } |
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139 |
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140 if (!isset($params['width'])) { |
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141 $width = $_image_data[0]; |
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142 } |
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143 if (!isset($params['height'])) { |
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144 $height = $_image_data[1]; |
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145 } |
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146 } |
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147 |
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148 if (isset($params['dpi'])) { |
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149 if (strstr($_SERVER['HTTP_USER_AGENT'], 'Mac')) { |
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150 // FIXME: (rodneyrehm) wrong dpi assumption |
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151 // don't know who thought this up… even if it was true in 1998, it's definitely wrong in 2011. |
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152 $dpi_default = 72; |
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153 } else { |
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154 $dpi_default = 96; |
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155 } |
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156 $_resize = $dpi_default / $params['dpi']; |
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157 $width = round($width * $_resize); |
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158 $height = round($height * $_resize); |
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159 } |
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160 |
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161 return $prefix . '<img src="' . $path_prefix . $file . '" alt="' . $alt . '" width="' . $width . '" height="' . $height . '"' . $extra . ' />' . $suffix; |
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162 } |