159 lines
5.5 KiB
PHP
159 lines
5.5 KiB
PHP
<?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 http://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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