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158 lines
5.5 KiB
158 lines
5.5 KiB
<?php |
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/** |
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* Smarty plugin |
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* |
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* @package Smarty |
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* @subpackage PluginsFunction |
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*/ |
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/** |
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* Smarty {html_image} function plugin |
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* Type: function |
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* Name: html_image |
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* Date: Feb 24, 2003 |
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* Purpose: format HTML tags for the image |
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* Examples: {html_image file="/images/masthead.gif"} |
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* Output: <img src="/images/masthead.gif" width=400 height=23> |
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* Params: |
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* |
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* - file - (required) - file (and path) of image |
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* - height - (optional) - image height (default actual height) |
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* - width - (optional) - image width (default actual width) |
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* - basedir - (optional) - base directory for absolute paths, default is environment variable DOCUMENT_ROOT |
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* - path_prefix - prefix for path output (optional, default empty) |
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* |
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* @link https://www.smarty.net/manual/en/language.function.html.image.php {html_image} |
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* (Smarty online manual) |
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* @author Monte Ohrt <monte at ohrt dot com> |
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* @author credits to Duda <duda@big.hu> |
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* @version 1.0 |
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* |
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* @param array $params parameters |
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* @param Smarty_Internal_Template $template template object |
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* |
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* @throws SmartyException |
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* @return string |
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* @uses smarty_function_escape_special_chars() |
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*/ |
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function smarty_function_html_image($params, Smarty_Internal_Template $template) |
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{ |
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$template->_checkPlugins( |
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array( |
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array( |
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'function' => 'smarty_function_escape_special_chars', |
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'file' => SMARTY_PLUGINS_DIR . 'shared.escape_special_chars.php' |
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) |
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) |
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); |
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$alt = ''; |
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$file = ''; |
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$height = ''; |
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$width = ''; |
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$extra = ''; |
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$prefix = ''; |
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$suffix = ''; |
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$path_prefix = ''; |
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$basedir = isset($_SERVER[ 'DOCUMENT_ROOT' ]) ? $_SERVER[ 'DOCUMENT_ROOT' ] : ''; |
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foreach ($params as $_key => $_val) { |
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switch ($_key) { |
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case 'file': |
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case 'height': |
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case 'width': |
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case 'dpi': |
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case 'path_prefix': |
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case 'basedir': |
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$$_key = $_val; |
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break; |
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case 'alt': |
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if (!is_array($_val)) { |
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$$_key = smarty_function_escape_special_chars($_val); |
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} else { |
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throw new SmartyException( |
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"html_image: extra attribute '{$_key}' cannot be an array", |
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E_USER_NOTICE |
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); |
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} |
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break; |
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case 'link': |
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case 'href': |
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$prefix = '<a href="' . $_val . '">'; |
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$suffix = '</a>'; |
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break; |
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default: |
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if (!is_array($_val)) { |
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$extra .= ' ' . $_key . '="' . smarty_function_escape_special_chars($_val) . '"'; |
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} else { |
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throw new SmartyException( |
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"html_image: extra attribute '{$_key}' cannot be an array", |
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E_USER_NOTICE |
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); |
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} |
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break; |
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} |
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} |
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if (empty($file)) { |
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trigger_error('html_image: missing \'file\' parameter', E_USER_NOTICE); |
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return; |
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} |
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if ($file[ 0 ] === '/') { |
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$_image_path = $basedir . $file; |
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} else { |
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$_image_path = $file; |
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} |
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// strip file protocol |
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if (stripos($params[ 'file' ], 'file://') === 0) { |
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$params[ 'file' ] = substr($params[ 'file' ], 7); |
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} |
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$protocol = strpos($params[ 'file' ], '://'); |
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if ($protocol !== false) { |
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$protocol = strtolower(substr($params[ 'file' ], 0, $protocol)); |
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} |
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if (isset($template->smarty->security_policy)) { |
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if ($protocol) { |
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// remote resource (or php stream, …) |
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if (!$template->smarty->security_policy->isTrustedUri($params[ 'file' ])) { |
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return; |
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} |
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} else { |
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// local file |
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if (!$template->smarty->security_policy->isTrustedResourceDir($_image_path)) { |
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return; |
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} |
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} |
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} |
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if (!isset($params[ 'width' ]) || !isset($params[ 'height' ])) { |
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// FIXME: (rodneyrehm) getimagesize() loads the complete file off a remote resource, use custom [jpg,png,gif]header reader! |
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if (!$_image_data = @getimagesize($_image_path)) { |
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if (!file_exists($_image_path)) { |
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trigger_error("html_image: unable to find '{$_image_path}'", E_USER_NOTICE); |
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return; |
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} elseif (!is_readable($_image_path)) { |
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trigger_error("html_image: unable to read '{$_image_path}'", E_USER_NOTICE); |
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return; |
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} else { |
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trigger_error("html_image: '{$_image_path}' is not a valid image file", E_USER_NOTICE); |
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return; |
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} |
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} |
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if (!isset($params[ 'width' ])) { |
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$width = $_image_data[ 0 ]; |
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} |
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if (!isset($params[ 'height' ])) { |
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$height = $_image_data[ 1 ]; |
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} |
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} |
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if (isset($params[ 'dpi' ])) { |
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if (strstr($_SERVER[ 'HTTP_USER_AGENT' ], 'Mac')) { |
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// FIXME: (rodneyrehm) wrong dpi assumption |
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// don't know who thought this up… even if it was true in 1998, it's definitely wrong in 2011. |
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$dpi_default = 72; |
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} else { |
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$dpi_default = 96; |
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} |
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$_resize = $dpi_default / $params[ 'dpi' ]; |
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$width = round($width * $_resize); |
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$height = round($height * $_resize); |
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} |
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return $prefix . '<img src="' . $path_prefix . $file . '" alt="' . $alt . '" width="' . $width . '" height="' . |
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$height . '"' . $extra . ' />' . $suffix; |
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}
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