portal/patient/fwk/libs/savant/Savant3/resources/Savant3_Plugin_image.php

   1 <?php
   2
   3 /**
   4  *
   5  * Plugin to generate an <img ... /> tag.
   6  *
   7  * @package Savant3
   8  *
   9  * @author Paul M. Jones <pmjones@ciaweb.net>
  10  *
  11  * @license http://www.gnu.org/copyleft/lesser.html LGPL
  12  *
  13  * @version $Id: Savant3_Plugin_image.php,v 1.7 2005/08/12 14:34:09 pmjones Exp $
  14  *
  15  */
  16
  17 /**
  18  *
  19  * Plugin to generate an <img ... /> tag.
  20  *
  21  * Support for alpha transparency of PNG files in Microsoft IE added by
  22  * Edward Ritter; thanks, Edward.
  23  *
  24  * @package Savant3
  25  *
  26  * @author Paul M. Jones <pmjones@ciaweb.net>
  27  *
  28  *
  29  */
  30 class Savant3_Plugin_image extends Savant3_Plugin
  31 {
  32     /**
  33      *
  34      * The document root.
  35      *
  36      * @access public
  37      *
  38      * @var string
  39      *
  40      */
  41     protected $documentRoot = null;
  42
  43     /**
  44      *
  45      * The base directory for images within the document root.
  46      *
  47      * @access public
  48      *
  49      * @var string
  50      *
  51      */
  52     protected $imageDir = null;
  53
  54     /**
  55      *
  56      * Outputs an <img ... /> tag.
  57      *
  58      * Microsoft IE alpha PNG support added by Edward Ritter.
  59      *
  60      * @access public
  61      *
  62      * @param string $file
  63      *          The path to the image on the local file system
  64      *          relative to $this->imageDir.
  65      *
  66      * @param string $alt
  67      *          Alternative descriptive text for the image;
  68      *          defaults to the filename of the image.
  69      *
  70      * @param int $border
  71      *          The border width for the image; defaults to zero.
  72      *
  73      * @param int $width
  74      *          The displayed image width in pixels; defaults to
  75      *          the width of the image.
  76      *
  77      * @param int $height
  78      *          The displayed image height in pixels; defaults to
  79      *          the height of the image.
  80      *
  81      * @return string An <img ... /> tag.
  82      *
  83      */
  84     public function image($file, $alt = null, $height = null, $width = null, $attr = null)
  85     {
  86         // is the document root set?
  87         if (is_null($this->documentRoot) && isset($_SERVER ['DOCUMENT_ROOT'])) {
  88             // no, so set it
  89             $this->documentRoot = $_SERVER ['DOCUMENT_ROOT'];
  90         }
  91
  92         // make sure there's a DIRECTORY_SEPARATOR between the docroot
  93         // and the image dir
  94         if (substr($this->documentRoot, - 1) != DIRECTORY_SEPARATOR && substr($this->imageDir, 0, 1) != DIRECTORY_SEPARATOR) {
  95             $this->documentRoot .= DIRECTORY_SEPARATOR;
  96         }
  97
  98         // make sure there's a separator between the imageDir and the
  99         // file name
 100         if (substr($this->imageDir, - 1) != DIRECTORY_SEPARATOR && substr($file, 0, 1) != DIRECTORY_SEPARATOR) {
 101             $this->imageDir .= DIRECTORY_SEPARATOR;
 102         }
 103
 104         // the image file type code (PNG = 3)
 105         $type = null;
 106
 107         // get the file information
 108         $info = false;
 109
 110         if (strpos($file, '://') === false) {
 111             // no "://" in the file, so it's local
 112             $file = $this->imageDir . $file;
 113             $tmp = $this->documentRoot . $file;
 114             $info = @getimagesize($tmp);
 115         } else {
 116             // don't attempt to get file info from streams, it takes
 117             // way too long.
 118             $info = false;
 119         }
 120
 121         // did we find the file info?
 122         if (is_array($info)) {
 123             // capture type info regardless
 124             $type = $info [2];
 125
 126             // capture size info where both not specified
 127             if (is_null($width) && is_null($height)) {
 128                 $width = $info [0];
 129                 $height = $info [1];
 130             }
 131         }
 132
 133         // clean up
 134         unset($info);
 135
 136         // is the file a PNG? if so, check user agent, we will need to
 137         // make special allowances for Microsoft IE.
 138         if (stristr($_SERVER ['HTTP_USER_AGENT'], 'MSIE') && $type === 3) {
 139             // support alpha transparency for PNG files in MSIE
 140             $html = '<span style="position: relative;';
 141
 142             if ($height) {
 143                 $html .= ' height: ' . $height . 'px;';
 144             }
 145
 146             if ($width) {
 147                 $html .= ' width: ' . $width . 'px;';
 148             }
 149
 150             $html .= ' filter:progid:DXImageTransform.Microsoft.AlphaImageLoader';
 151             $html .= "(src='" . htmlspecialchars($file) . "',sizingMethod='scale');\"";
 152             $html .= ' title="' . htmlspecialchars($alt) . '"';
 153
 154             $html .= $this->Savant->htmlAttribs($attr);
 155
 156             // done
 157             $html .= '></span>';
 158         } else {
 159             // not IE, so build a normal image tag.
 160             $html = '<img';
 161             $html .= ' src="' . htmlspecialchars($file) . '"';
 162
 163             // add the alt attribute
 164             if (is_null($alt)) {
 165                 $alt = basename($file);
 166             }
 167
 168             $html .= ' alt="' . htmlspecialchars($alt) . '"';
 169
 170             // add the height attribute
 171             if ($height) {
 172                 $html .= ' height="' . htmlspecialchars($height) . '"';
 173             }
 174
 175             // add the width attribute
 176             if ($width) {
 177                 $html .= ' width="' . htmlspecialchars($width) . '"';
 178             }
 179
 180             $html .= $this->Savant->htmlAttribs($attr);
 181
 182             // done
 183             $html .= ' />';
 184         }
 185
 186         // done!
 187         return $html;
 188     }
 189 }