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220 lines
4.5 KiB
PHP
Executable File
220 lines
4.5 KiB
PHP
Executable File
<?php
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/**
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* Base plugin class.
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*/
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require_once 'Savant2/Plugin.php';
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/**
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*
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* Outputs an <image ... /> tag.
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*
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* Support for alpha transparency of PNG files in Microsoft IE added by
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* Edward Ritter; thanks, Edward.
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*
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* $Id$
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*
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* @author Paul M. Jones <pmjones@ciaweb.net>
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*
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* @author Edward Ritter <esritter@gmail.com>
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*
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* @package Savant2
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*
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* @license http://www.gnu.org/copyleft/lesser.html LGPL
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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*/
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class Savant2_Plugin_image extends Savant2_Plugin {
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/**
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*
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* The document root.
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*
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* @access public
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*
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* @var string
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*
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*/
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var $documentRoot = null;
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/**
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*
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* The base directory for images within the document root.
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*
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* @access public
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*
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* @var string
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*
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*/
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var $imageDir = null;
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/**
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*
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* Outputs an <img ... /> tag.
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*
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* Microsoft IE alpha PNG support added by Edward Ritter.
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*
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* @access public
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*
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* @param string $file The path to the image on the local file system
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* relative to $this->imageDir.
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*
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* @param string $alt Alternative descriptive text for the image;
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* defaults to the filename of the image.
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*
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* @param int $border The border width for the image; defaults to zero.
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*
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* @param int $width The displayed image width in pixels; defaults to
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* the width of the image.
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*
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* @param int $height The displayed image height in pixels; defaults to
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* the height of the image.
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*
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*/
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function plugin($file, $alt = null, $height = null, $width = null,
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$attr = null)
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{
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// is the document root set?
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if (is_null($this->documentRoot)) {
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// no, so set it
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$this->documentRoot = $_SERVER['DOCUMENT_ROOT'];
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}
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// the image file type code (PNG = 3)
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$type = null;
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// get the file information
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$info = false;
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if (strpos($file, '://') === false) {
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// no "://" in the file, so it's local
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$file = $this->imageDir . $file;
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$info = @getimagesize($this->documentRoot . $file);
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} else {
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// get the file size info as from a stream
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$info = @getimagesize($file);
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}
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// did we find the file?
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if (is_array($info)) {
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// capture type info regardless
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$type = $info[2];
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// capture size info where both not specified
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if (is_null($width) && is_null($height)) {
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$width = $info[0];
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$height = $info[1];
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}
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}
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// clean up
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unset($info);
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// is the file a PNG? if so, check user agent, we will need to
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// make special allowances for Microsoft IE.
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if (stristr($_SERVER['HTTP_USER_AGENT'], 'MSIE') && $type === 3) {
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// support alpha transparency for PNG files in MSIE
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$html = '<span style="position: relative;';
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if ($height) {
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$html .= ' height: ' . $height . 'px;';
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}
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if ($width) {
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$html .= ' width: ' . $width . 'px;';
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}
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$html .= ' filter:progid:DXImageTransform.Microsoft.AlphaImageLoader';
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$html .= "(src='$file',sizingMethod='scale');\"";
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$html .= ' title="' . htmlspecialchars($alt) . '"';
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$html .= $this->_attr($attr);
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// done
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$html .= '></span>';
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} else {
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// not IE, so build a normal image tag.
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$html = '<img';
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$html .= ' src="' . htmlspecialchars($file) . '"';
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// add the alt attribute
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if (is_null($alt)) {
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$alt = basename($file);
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}
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$html .= ' alt="' . htmlspecialchars($alt) . '"';
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// add the height attribute
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if ($height) {
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$html .= ' height="' . htmlspecialchars($height) . '"';
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}
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// add the width attribute
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if ($width) {
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$html .= ' width="' . htmlspecialchars($width) . '"';
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}
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$html .= $this->_attr($attr);
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// done
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$html .= ' />';
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}
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// done!
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return $html;
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}
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/**
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*
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* Create additional HTML attributes.
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*
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* @access private
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*
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* @param array|string $attr An array or string of attributes.
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*
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* @return string A string of attributes.
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*
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*/
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function _attr($attr = null)
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{
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$html = '';
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// add other attributes
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if (is_array($attr)) {
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// from array
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foreach ($attr as $key => $val) {
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$key = htmlspecialchars($key);
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$val = htmlspecialchars($val);
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$html .= " $key=\"$val\"";
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}
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} elseif (! is_null($attr)) {
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// from scalar
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$html .= " $attr";
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}
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return $html;
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}
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}
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?>
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