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File: resources/Smarty/plugins/function.html_image.php

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File: resources/Smarty/plugins/function.html_image.php
Role: Example script
Content type: text/plain
Description: Example script
Class: Basic Controller Framework
Framework to route requests configured controllers
Author: By
Last change:
Date: 6 months ago
Size: 5,511 bytes
 

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Class file image Download
<?php
/**
 * Smarty plugin
 *
 * @package Smarty
 * @subpackage PluginsFunction
 */

/**
 * Smarty {html_image} function plugin
 * Type: function<br>
 * Name: html_image<br>
 * Date: Feb 24, 2003<br>
 * Purpose: format HTML tags for the image<br>
 * Examples: {html_image file="/images/masthead.gif"}<br>
 * Output: <img src="/images/masthead.gif" width=400 height=23><br>
 * Params:
 * <pre>
 * - file - (required) - file (and path) of image
 * - height - (optional) - image height (default actual height)
 * - width - (optional) - image width (default actual width)
 * - basedir - (optional) - base directory for absolute paths, default is environment variable DOCUMENT_ROOT
 * - path_prefix - prefix for path output (optional, default empty)
 * </pre>
 *
 * @link http://www.smarty.net/manual/en/language.function.html.image.php {html_image}
 * (Smarty online manual)
 * @author Monte Ohrt <monte at ohrt dot com>
 * @author credits to Duda <duda@big.hu>
 * @version 1.0
 *
 * @param array $params parameters
 * @param Smarty_Internal_Template $template template object
 *
 * @throws SmartyException
 * @return string
 * @uses smarty_function_escape_special_chars()
 */
function smarty_function_html_image($params, $template)
{
    if (!isset(
$template->smarty->_cache[ '_required_sesc' ])) {
        require_once(
SMARTY_PLUGINS_DIR . 'shared.escape_special_chars.php');
       
$template->smarty->_cache[ '_required_sesc' ] = true;
    }

   
$alt = '';
   
$file = '';
   
$height = '';
   
$width = '';
   
$extra = '';
   
$prefix = '';
   
$suffix = '';
   
$path_prefix = '';
   
$basedir = isset($_SERVER[ 'DOCUMENT_ROOT' ]) ? $_SERVER[ 'DOCUMENT_ROOT' ] : '';
    foreach (
$params as $_key => $_val) {
        switch (
$_key) {
            case
'file':
            case
'height':
            case
'width':
            case
'dpi':
            case
'path_prefix':
            case
'basedir':
                $
$_key = $_val;
                break;

            case
'alt':
                if (!
is_array($_val)) {
                    $
$_key = smarty_function_escape_special_chars($_val);
                } else {
                    throw new
SmartyException ("html_image: extra attribute '$_key' cannot be an array", E_USER_NOTICE);
                }
                break;

            case
'link':
            case
'href':
               
$prefix = '<a href="' . $_val . '">';
               
$suffix = '</a>';
                break;

            default:
                if (!
is_array($_val)) {
                   
$extra .= ' ' . $_key . '="' . smarty_function_escape_special_chars($_val) . '"';
                } else {
                    throw new
SmartyException ("html_image: extra attribute '$_key' cannot be an array", E_USER_NOTICE);
                }
                break;
        }
    }

    if (empty(
$file)) {
       
trigger_error("html_image: missing 'file' parameter", E_USER_NOTICE);

        return;
    }

    if (
$file[ 0 ] == '/') {
       
$_image_path = $basedir . $file;
    } else {
       
$_image_path = $file;
    }

   
// strip file protocol
   
if (stripos($params[ 'file' ], 'file://') === 0) {
       
$params[ 'file' ] = substr($params[ 'file' ], 7);
    }

   
$protocol = strpos($params[ 'file' ], '://');
    if (
$protocol !== false) {
       
$protocol = strtolower(substr($params[ 'file' ], 0, $protocol));
    }

    if (isset(
$template->smarty->security_policy)) {
        if (
$protocol) {
           
// remote resource (or php stream, ?)
           
if (!$template->smarty->security_policy->isTrustedUri($params[ 'file' ])) {
                return;
            }
        } else {
           
// local file
           
if (!$template->smarty->security_policy->isTrustedResourceDir($_image_path)) {
                return;
            }
        }
    }

    if (!isset(
$params[ 'width' ]) || !isset($params[ 'height' ])) {
       
// FIXME: (rodneyrehm) getimagesize() loads the complete file off a remote resource, use custom [jpg,png,gif]header reader!
       
if (!$_image_data = @getimagesize($_image_path)) {
            if (!
file_exists($_image_path)) {
               
trigger_error("html_image: unable to find '$_image_path'", E_USER_NOTICE);

                return;
            } elseif (!
is_readable($_image_path)) {
               
trigger_error("html_image: unable to read '$_image_path'", E_USER_NOTICE);

                return;
            } else {
               
trigger_error("html_image: '$_image_path' is not a valid image file", E_USER_NOTICE);

                return;
            }
        }

        if (!isset(
$params[ 'width' ])) {
           
$width = $_image_data[ 0 ];
        }
        if (!isset(
$params[ 'height' ])) {
           
$height = $_image_data[ 1 ];
        }
    }

    if (isset(
$params[ 'dpi' ])) {
        if (
strstr($_SERVER[ 'HTTP_USER_AGENT' ], 'Mac')) {
           
// FIXME: (rodneyrehm) wrong dpi assumption
            // don't know who thought this up? even if it was true in 1998, it's definitely wrong in 2011.
           
$dpi_default = 72;
        } else {
           
$dpi_default = 96;
        }
       
$_resize = $dpi_default / $params[ 'dpi' ];
       
$width = round($width * $_resize);
       
$height = round($height * $_resize);
    }

    return
$prefix . '<img src="' . $path_prefix . $file . '" alt="' . $alt . '" width="' . $width . '" height="' .
          
$height . '"' . $extra . ' />' . $suffix;
}