includes/MediaTransformOutput.php

   1 <?php
   2
   3 /**
   4  * Base class for the output of MediaHandler::doTransform() and Image::transform().
   5  *
   6  * @addtogroup Media
   7  */
   8 abstract class MediaTransformOutput {
   9         /**
  10          * Get the width of the output box
  11          */
  12         function getWidth() {
  13                 return $this->width;
  14         }
  15
  16         /**
  17          * Get the height of the output box
  18          */
  19         function getHeight() {
  20                 return $this->height;
  21         }
  22
  23         /**
  24          * @return string The thumbnail URL
  25          */
  26         function getUrl() {
  27                 return $this->url;
  28         }
  29
  30         /**
  31          * @return string Destination file path (local filesystem)
  32          */
  33         function getPath() {
  34                 return $this->path;
  35         }
  36
  37         /**
  38          * Fetch HTML for this transform output
  39          * @param array $attribs Advisory associative array of HTML attributes supplied
  40          *    by the linker. These can be incorporated into the output in any way.
  41          * @param array $linkAttribs Attributes of a suggested enclosing <a> tag.
  42          *    May be ignored.
  43          */
  44         abstract function toHtml( $attribs = array() , $linkAttribs = false );
  45
  46         /**
  47          * This will be overridden to return true in error classes
  48          */
  49         function isError() {
  50                 return false;
  51         }
  52
  53         /**
  54          * Wrap some XHTML text in an anchor tag with the given attributes
  55          */
  56         protected function linkWrap( $linkAttribs, $contents ) {
  57                 if ( $linkAttribs ) {
  58                         return Xml::tags( 'a', $linkAttribs, $contents );
  59                 } else {
  60                         return $contents;
  61                 }
  62         }
  63 }
  64
  65
  66 /**
  67  * Media transform output for images
  68  *
  69  * @addtogroup Media
  70  */
  71 class ThumbnailImage extends MediaTransformOutput {
  72         /**
  73          * @param string $path Filesystem path to the thumb
  74          * @param string $url URL path to the thumb
  75          * @private
  76          */
  77         function ThumbnailImage( $url, $width, $height, $path = false ) {
  78                 $this->url = $url;
  79                 # These should be integers when they get here.
  80                 # If not, there's a bug somewhere.  But let's at
  81                 # least produce valid HTML code regardless.
  82                 $this->width = round( $width );
  83                 $this->height = round( $height );
  84                 $this->path = $path;
  85         }
  86
  87         /**
  88          * Return HTML <img ... /> tag for the thumbnail, will include
  89          * width and height attributes and a blank alt text (as required).
  90          *
  91          * You can set or override additional attributes by passing an
  92          * associative array of name => data pairs. The data will be escaped
  93          * for HTML output, so should be in plaintext.
  94          *
  95          * If $linkAttribs is given, the image will be enclosed in an <a> tag.
  96          *
  97          * @param array $attribs
  98          * @param array $linkAttribs
  99          * @return string
 100          * @public
 101          */
 102         function toHtml( $attribs = array(), $linkAttribs = false ) {
 103                 $attribs['src'] = $this->url;
 104                 $attribs['width'] = $this->width;
 105                 $attribs['height'] = $this->height;
 106                 if( !isset( $attribs['alt'] ) ) $attribs['alt'] = '';
 107                 return $this->linkWrap( $linkAttribs, Xml::element( 'img', $attribs ) );
 108         }
 109
 110 }
 111
 112 /**
 113  * Basic media transform error class
 114  *
 115  * @addtogroup Media
 116  */
 117 class MediaTransformError extends MediaTransformOutput {
 118         var $htmlMsg, $textMsg, $width, $height, $url, $path;
 119
 120         function __construct( $msg, $width, $height /*, ... */ ) {
 121                 $args = array_slice( func_get_args(), 3 );
 122                 $htmlArgs = array_map( 'htmlspecialchars', $args );
 123                 $htmlArgs = array_map( 'nl2br', $htmlArgs );
 124
 125                 $this->htmlMsg = wfMsgReplaceArgs( htmlspecialchars( wfMsgGetKey( $msg, true ) ), $htmlArgs );
 126                 $this->textMsg = wfMsgReal( $msg, $args );
 127                 $this->width = intval( $width );
 128                 $this->height = intval( $height );
 129                 $this->url = false;
 130                 $this->path = false;
 131         }
 132
 133         function toHtml( $attribs = array(), $linkAttribs = false ) {
 134                 return "<table class=\"MediaTransformError\" style=\"" .
 135                         "width: {$this->width}px; height: {$this->height}px;\"><tr><td>" .
 136                         $this->htmlMsg .
 137                         "</td></tr></table>";
 138         }
 139
 140         function toText() {
 141                 return $this->textMsg;
 142         }
 143
 144         function getHtmlMsg() {
 145                 return $this->htmlMsg;
 146         }
 147
 148         function isError() {
 149                 return true;
 150         }
 151 }
 152
 153 /**
 154  * Shortcut class for parameter validation errors
 155  *
 156  * @addtogroup Media
 157  */
 158 class TransformParameterError extends MediaTransformError {
 159         function __construct( $params ) {
 160                 parent::__construct( 'thumbnail_error',
 161                         max( isset( $params['width']  ) ? $params['width']  : 0, 180 ),
 162                         max( isset( $params['height'] ) ? $params['height'] : 0, 180 ),
 163                         wfMsg( 'thumbnail_invalid_params' ) );
 164         }
 165 }
 166
 167 ?>