2 * JavaScript for Special:Upload
3 * Note that additional code still lives in skins/common/upload.js
7 * Add a preview to the upload form
9 jQuery( function( $ ) {
11 * Is the FileAPI available with sufficient functionality?
13 function hasFileAPI(){
14 return typeof window
.FileReader
!== 'undefined';
18 * Check if this is a recognizable image type...
19 * Also excludes files over 10M to avoid going insane on memory usage.
21 * @todo is there a way we can ask the browser what's supported in <img>s?
26 function fileIsPreviewable( file
) {
27 var known
= ['image/png', 'image/gif', 'image/jpeg', 'image/svg+xml'],
28 tooHuge
= 10 * 1024 * 1024;
29 return ( $.inArray( file
.type
, known
) !== -1 ) && file
.size
> 0 && file
.size
< tooHuge
;
33 * Show a thumbnail preview of PNG, JPEG, GIF, and SVG files prior to upload
34 * in browsers supporting HTML5 FileAPI.
36 * As of this writing, known good:
38 * - Chrome 7.something
40 * @todo check file size limits and warn of likely failures
44 function showPreview( file
) {
45 var previewSize
= 180,
46 thumb
= $( '<div id="mw-upload-thumbnail" class="thumb tright">' +
47 '<div class="thumbinner">' +
48 '<canvas width="' + previewSize
+ '" height="' + previewSize
+ '" ></canvas>' +
49 '<div class="thumbcaption"><div class="filename"></div><div class="fileinfo"></div></div>' +
52 thumb
.find( '.filename' ).text( file
.name
).end()
53 .find( '.fileinfo' ).text( prettySize( file
.size
) ).end();
55 var ctx
= thumb
.find( 'canvas' )[0].getContext( '2d' ),
56 spinner
= new Image();
57 spinner
.onload = function() {
58 ctx
.drawImage( spinner
, (previewSize
- spinner
.width
) / 2,
59 (previewSize
- spinner
.height
) / 2 );
61 spinner
.src
= mw
.config
.get( 'wgScriptPath' ) + '/skins/common/images/spinner.gif';
62 $( '#mw-htmlform-source' ).parent().prepend( thumb
);
65 fetchPreview( file
, function( dataURL
) {
66 var img
= new Image(),
69 if ( meta
&& meta
.tiff
&& meta
.tiff
.Orientation
) {
70 rotation
= (360 - function () {
71 // See includes/media/Bitmap.php
72 switch ( meta
.tiff
.Orientation
.value
) {
85 img
.onload = function() {
86 var width
, height
, x
, y
, dx
, dy
;
87 // Fit the image within the previewSizexpreviewSize box
88 if ( img
.width
> img
.height
) {
90 height
= img
.height
/ img
.width
* previewSize
;
93 width
= img
.width
/ img
.height
* previewSize
;
95 // Determine the offset required to center the image
96 dx
= (180 - width
) / 2;
97 dy
= (180 - height
) / 2;
99 // If a rotation is applied, the direction of the axis
100 // changes as well. You can derive the values below by
101 // drawing on paper an axis system, rotate it and see
102 // where the positive axis direction is
110 y
= dy
- previewSize
;
113 x
= dx
- previewSize
;
114 y
= dy
- previewSize
;
117 x
= dx
- previewSize
;
122 ctx
.clearRect( 0, 0, 180, 180 );
123 ctx
.rotate( rotation
/ 180 * Math
.PI
);
124 ctx
.drawImage( img
, x
, y
, width
, height
);
127 var info
= mw
.msg( 'widthheight', img
.width
, img
.height
) +
128 ', ' + prettySize( file
.size
);
129 $( '#mw-upload-thumbnail .fileinfo' ).text( info
);
132 }, mw
.config
.get( 'wgFileCanRotate' ) ? function ( data
) {
134 meta
= mw
.libs
.jpegmeta( data
, file
.fileName
);
135 meta
._binary_data
= null;
143 * Start loading a file into memory; when complete, pass it as a
144 * data URL to the callback function. If the callbackBinary is set it will
145 * first be read as binary and afterwards as data URL. Useful if you want
146 * to do preprocessing on the binary data first.
149 * @param {function} callback
150 * @param {function} callbackBinary
152 function fetchPreview( file
, callback
, callbackBinary
) {
153 var reader
= new FileReader();
154 reader
.onload = function() {
155 if ( callbackBinary
) {
156 callbackBinary( reader
.result
);
157 reader
.onload = function() {
158 callback( reader
.result
);
160 reader
.readAsDataURL( file
);
162 callback( reader
.result
);
165 if ( callbackBinary
) {
166 reader
.readAsBinaryString( file
);
168 reader
.readAsDataURL( file
);
173 * Format a file size attractively.
174 * @todo match numeric formatting
179 function prettySize( s
) {
180 var sizes
= ['size-bytes', 'size-kilobytes', 'size-megabytes', 'size-gigabytes'];
181 while ( s
>= 1024 && sizes
.length
> 1 ) {
183 sizes
= sizes
.slice( 1 );
185 return mw
.msg( sizes
[0], Math
.round( s
) );
189 * Clear the file upload preview area.
191 function clearPreview() {
192 $( '#mw-upload-thumbnail' ).remove();
196 * Check if the file does not exceed the maximum size
198 function checkMaxUploadSize( file
) {
199 function getMaxUploadSize( type
) {
200 var sizes
= mw
.config
.get( 'wgMaxUploadSize' );
201 if ( sizes
[type
] !== undefined ) {
206 $( '.mw-upload-source-error' ).remove();
208 var maxSize
= getMaxUploadSize( 'file' );
209 if ( file
.size
> maxSize
) {
210 var error
= $( '<p class="error mw-upload-source-error" id="wpSourceTypeFile-error">' +
211 mw
.message( 'largefileserver', file
.size
, maxSize
).escaped() + '</p>' );
212 $( '#wpUploadFile' ).after( error
);
222 if ( hasFileAPI() ) {
223 // Update thumbnail when the file selection control is updated.
224 $( '#wpUploadFile' ).change( function() {
226 if ( this.files
&& this.files
.length
) {
227 // Note: would need to be updated to handle multiple files.
228 var file
= this.files
[0];
230 if ( !checkMaxUploadSize( file
) ) {
234 if ( fileIsPreviewable( file
) ) {
243 * Disable all upload source fields except the selected one
245 jQuery( function ( $ ) {
246 var rows
= $( '.mw-htmlform-field-UploadSourceField' );
247 for ( var i
= rows
.length
; i
; i
-- ) {
248 var row
= rows
[i
- 1];
249 $( 'input[name="wpSourceType"]', row
).change( function () {
250 var currentRow
= row
; // Store current row in our own scope
252 $( '.mw-upload-source-error' ).remove();
253 if ( this.checked
) {
254 // Disable all inputs
255 $( 'input[name!="wpSourceType"]', rows
).prop( 'disabled', 'disabled' );
256 // Re-enable the current one
257 $( 'input', currentRow
).prop( 'disabled', false );