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 // Fit the image within the previewSizexpreviewSize box
87 if ( img
.width
> img
.height
) {
89 height
= img
.height
/ img
.width
* previewSize
;
92 width
= img
.width
/ img
.height
* previewSize
;
94 // Determine the offset required to center the image
95 dx
= (180 - width
) / 2;
96 dy
= (180 - height
) / 2;
98 // If a rotation is applied, the direction of the axis
99 // changes as well. You can derive the values below by
100 // drawing on paper an axis system, rotate it and see
101 // where the positive axis direction is
109 y
= dy
- previewSize
;
112 x
= dx
- previewSize
;
113 y
= dy
- previewSize
;
116 x
= dx
- previewSize
;
121 ctx
.clearRect( 0, 0, 180, 180 );
122 ctx
.rotate( rotation
/ 180 * Math
.PI
);
123 ctx
.drawImage( img
, x
, y
, width
, height
);
126 var info
= mw
.msg( 'widthheight', img
.width
, img
.height
) +
127 ', ' + prettySize( file
.size
);
128 $( '#mw-upload-thumbnail .fileinfo' ).text( info
);
131 }, mw
.config
.get( 'wgFileCanRotate' ) ? function ( data
) {
133 meta
= mw
.util
.jpegmeta( data
, file
.fileName
);
134 meta
._binary_data
= null;
142 * Start loading a file into memory; when complete, pass it as a
143 * data URL to the callback function. If the callbackBinary is set it will
144 * first be read as binary and afterwards as data URL. Useful if you want
145 * to do preprocessing on the binary data first.
148 * @param {function} callback
149 * @param {function} callbackBinary
151 function fetchPreview( file
, callback
, callbackBinary
) {
152 var reader
= new FileReader();
153 reader
.onload = function() {
154 if ( callbackBinary
) {
155 callbackBinary( reader
.result
);
156 reader
.onload = function() {
157 callback( reader
.result
);
159 reader
.readAsDataURL( file
);
161 callback( reader
.result
);
164 if ( callbackBinary
) {
165 reader
.readAsBinaryString( file
);
167 reader
.readAsDataURL( file
);
172 * Format a file size attractively.
173 * @todo match numeric formatting
178 function prettySize( s
) {
179 var sizes
= ['size-bytes', 'size-kilobytes', 'size-megabytes', 'size-gigabytes'];
180 while ( s
>= 1024 && sizes
.length
> 1 ) {
182 sizes
= sizes
.slice( 1 );
184 return mw
.msg( sizes
[0], Math
.round( s
) );
188 * Clear the file upload preview area.
190 function clearPreview() {
191 $( '#mw-upload-thumbnail' ).remove();
195 if ( hasFileAPI() ) {
196 // Update thumbnail when the file selection control is updated.
197 $( '#wpUploadFile' ).change( function() {
199 if ( this.files
&& this.files
.length
) {
200 // Note: would need to be updated to handle multiple files.
201 var file
= this.files
[0];
202 if ( fileIsPreviewable( file
) ) {
211 * Disable all upload source fields except the selected one
213 jQuery( function ( $ ) {
214 var rows
= $( '.mw-htmlform-field-UploadSourceField' );
215 for ( var i
= rows
.length
; i
; i
-- ) {
216 var row
= rows
[i
- 1];
217 $( 'input[name="wpSourceType"]', row
).change( function () {
218 var currentRow
= row
; // Store current row in our own scope
220 if ( this.checked
) {
221 // Disable all inputs
222 $( 'input[name!="wpSourceType"]', rows
).attr( 'disabled', true );
223 // Re-enable the current one
224 $( 'input', currentRow
).attr( 'disabled', false );