2 * Show gallery captions when focused. Copied directly from jquery.mw-jump.js.
3 * Also Dynamically resize images to justify them.
9 galleries
= 'ul.mw-gallery-packed-overlay, ul.mw-gallery-packed-hover, ul.mw-gallery-packed';
11 // Is there a better way to detect a touchscreen? Current check taken from stack overflow.
12 isTouchScreen
= !!( window
.ontouchstart
!== undefined || window
.DocumentTouch
!== undefined && document
instanceof window
.DocumentTouch
);
14 if ( isTouchScreen
) {
15 // Always show the caption for a touch screen.
16 $( 'ul.mw-gallery-packed-hover' )
17 .addClass( 'mw-gallery-packed-overlay' )
18 .removeClass( 'mw-gallery-packed-hover' );
20 // Note use of just "a", not a.image, since we want this to trigger if a link in
21 // the caption receives focus
22 $( 'ul.mw-gallery-packed-hover li.gallerybox' ).on( 'focus blur', 'a', function ( e
) {
23 // Confusingly jQuery leaves e.type as focusout for delegated blur events
24 gettingFocus
= e
.type
!== 'blur' && e
.type
!== 'focusout';
25 $( this ).closest( 'li.gallerybox' ).toggleClass( 'mw-gallery-focused', gettingFocus
);
29 // Now on to justification.
30 // We may still get ragged edges if someone resizes their window. Could bind to
31 // that event, otoh do we really want to constantly be resizing galleries?
32 $( galleries
).each( function () {
40 $gallery
.children( 'li' ).each( function () {
41 // Math.floor to be paranoid if things are off by 0.00000000001
42 var top
= Math
.floor( $( this ).position().top
),
45 if ( top
!== lastTop
) {
46 rows
[rows
.length
] = [];
50 $img
= $this.find( 'div.thumb a.image img' );
51 if ( $img
.length
&& $img
[0].height
) {
52 imgHeight
= $img
[0].height
;
53 imgWidth
= $img
[0].width
;
55 // If we don't have a real image, get the containing divs width/height.
56 // Note that if we do have a real image, using this method will generally
57 // give the same answer, but can be different in the case of a very
58 // narrow image where extra padding is added.
59 imgHeight
= $this.children().children( 'div:first' ).height();
60 imgWidth
= $this.children().children( 'div:first' ).width();
63 // Hack to make an edge case work ok
64 if ( imgHeight
< 30 ) {
65 // Don't try and resize this item.
69 rows
[rows
.length
- 1][rows
[rows
.length
- 1].length
] = {
71 width
: $this.outerWidth(),
73 // XXX: can divide by 0 ever happen?
74 aspect
: imgWidth
/ imgHeight
,
75 captionWidth
: $this.children().children( 'div.gallerytextwrapper' ).width(),
102 for ( i
= 0; i
< rows
.length
; i
++ ) {
103 maxWidth
= $gallery
.width();
109 for ( j
= 0; j
< curRow
.length
; j
++ ) {
110 if ( curRowHeight
=== 0 ) {
111 if ( isFinite( curRow
[j
].height
) ) {
112 // Get the height of this row, by taking the first
113 // non-out of bounds height
114 curRowHeight
= curRow
[j
].height
;
118 if ( curRow
[j
].aspect
=== 0 || !isFinite( curRow
[j
].aspect
) ) {
119 mw
.log( 'Skipping item ' + j
+ ' due to aspect: ' + curRow
[j
].aspect
);
120 // One of the dimensions are 0. Probably should
121 // not try to resize.
122 combinedPadding
+= curRow
[j
].width
;
124 combinedAspect
+= curRow
[j
].aspect
;
125 combinedPadding
+= curRow
[j
].width
- curRow
[j
].imgWidth
;
129 // Add some padding for inter-element spacing.
130 combinedPadding
+= 5 * curRow
.length
;
131 wantedWidth
= maxWidth
- combinedPadding
;
132 preferredHeight
= wantedWidth
/ combinedAspect
;
134 if ( preferredHeight
> curRowHeight
* 1.5 ) {
135 // Only expand at most 1.5 times current size
136 // As that's as high a resolution as we have.
137 // Also on the off chance there is a bug in this
138 // code, would prevent accidentally expanding to
139 // be 10 billion pixels wide.
140 mw
.log( 'mw.page.gallery: Cannot fit row, aspect is ' + preferredHeight
/ curRowHeight
);
141 if ( i
=== rows
.length
- 1 ) {
142 // If its the last row, and we can't fit it,
143 // don't make the entire row huge.
144 avgZoom
= ( totalZoom
/ ( rows
.length
- 1 ) ) * curRowHeight
;
145 if ( isFinite( avgZoom
) && avgZoom
>= 1 && avgZoom
<= 1.5 ) {
146 preferredHeight
= avgZoom
;
148 // Probably a single row gallery
149 preferredHeight
= curRowHeight
;
152 preferredHeight
= 1.5 * curRowHeight
;
155 if ( !isFinite( preferredHeight
) ) {
156 // This *definitely* should not happen.
157 mw
.log( 'mw.page.gallery: Trying to resize row ' + i
+ ' to ' + preferredHeight
+ '?!' );
161 if ( preferredHeight
< 5 ) {
162 // Well something clearly went wrong...
165 combinedPadding
: combinedPadding
,
166 combinedAspect
: combinedAspect
,
167 wantedWidth
: wantedWidth
169 mw
.log( 'mw.page.gallery: [BUG!] Fitting row ' + i
+ ' to too small a size: ' + preferredHeight
);
174 if ( preferredHeight
/ curRowHeight
> 1 ) {
175 totalZoom
+= preferredHeight
/ curRowHeight
;
177 // If we shrink, still consider that a zoom of 1
181 for ( j
= 0; j
< curRow
.length
; j
++ ) {
182 newWidth
= preferredHeight
* curRow
[j
].aspect
;
183 padding
= curRow
[j
].width
- curRow
[j
].imgWidth
;
184 $outerDiv
= curRow
[j
].$elm
;
185 $innerDiv
= $outerDiv
.children( 'div' ).first();
186 $imageDiv
= $innerDiv
.children( 'div.thumb' );
187 $imageElm
= $imageDiv
.find( 'img' ).first();
188 imageElm
= $imageElm
.length
? $imageElm
[0] : null;
189 $caption
= $outerDiv
.find( 'div.gallerytextwrapper' );
191 // Since we are going to re-adjust the height, the vertical
192 // centering margins need to be reset.
193 $imageDiv
.children( 'div' ).css( 'margin', '0px auto' );
195 if ( newWidth
< 60 || !isFinite( newWidth
) ) {
196 // Making something skinnier than this will mess up captions,
197 mw
.log( 'mw.page.gallery: Tried to make image ' + newWidth
+ 'px wide but too narrow.' );
198 if ( newWidth
< 1 || !isFinite( newWidth
) ) {
199 $innerDiv
.height( preferredHeight
);
200 // Don't even try and touch the image size if it could mean
201 // making it disappear.
205 $outerDiv
.width( newWidth
+ padding
);
206 $innerDiv
.width( newWidth
+ padding
);
207 $imageDiv
.width( newWidth
);
208 $caption
.width( curRow
[j
].captionWidth
+ ( newWidth
- curRow
[j
].imgWidth
) );
212 fullWidth
: newWidth
+ padding
,
214 imgHeight
: preferredHeight
,
215 $innerDiv
: $innerDiv
,
216 $imageDiv
: $imageDiv
,
217 $outerDiv
: $outerDiv
,
218 // Whether the hook took action
225 * If your handler resizes an image, it should also set the resolved
226 * property to true. Additionally, because this module only exposes this
227 * logic temporarily, you should load your module in position top to
228 * ensure it is registered before this runs (FIXME: Don't use mw.hook)
230 * See TimedMediaHandler for an example.
232 * @event mediawiki_page_gallery_resize
234 * @param {Object} hookInfo
236 mw
.hook( 'mediawiki.page.gallery.resize' ).fire( hookInfo
);
238 if ( !hookInfo
.resolved
) {
240 // We don't always have an img, e.g. in the case of an invalid file.
241 imageElm
.width
= newWidth
;
242 imageElm
.height
= preferredHeight
;
245 $imageDiv
.height( preferredHeight
);
253 } )( jQuery
, mediaWiki
);