-/*!
- * Show gallery captions when focused. Copied directly from jquery.mw-jump.js.
- * Also Dynamically resize images to justify them.
- */
-( function ( mw, $ ) {
- var $galleries,
- bound = false,
- // Is there a better way to detect a touchscreen? Current check taken from stack overflow.
- isTouchScreen = !!( window.ontouchstart !== undefined ||
- window.DocumentTouch !== undefined && document instanceof window.DocumentTouch
- );
-
- /**
- * Perform the layout justification.
- *
- * @ignore
- * @context {HTMLElement} A `ul.mw-gallery-*` element
- */
- function justify() {
- var lastTop,
- $img,
- imgWidth,
- imgHeight,
- captionWidth,
- rows = [],
- $gallery = $( this );
-
- $gallery.children( 'li' ).each( function () {
- // Math.floor to be paranoid if things are off by 0.00000000001
- var top = Math.floor( $( this ).position().top ),
- $this = $( this );
-
- if ( top !== lastTop ) {
- rows[ rows.length ] = [];
- lastTop = top;
- }
-
- $img = $this.find( 'div.thumb a.image img' );
- if ( $img.length && $img[ 0 ].height ) {
- imgHeight = $img[ 0 ].height;
- imgWidth = $img[ 0 ].width;
- } else {
- // If we don't have a real image, get the containing divs width/height.
- // Note that if we do have a real image, using this method will generally
- // give the same answer, but can be different in the case of a very
- // narrow image where extra padding is added.
- imgHeight = $this.children().children( 'div:first' ).height();
- imgWidth = $this.children().children( 'div:first' ).width();
- }
-
- // Hack to make an edge case work ok
- if ( imgHeight < 30 ) {
- // Don't try and resize this item.
- imgHeight = 0;
- }
-
- captionWidth = $this.children().children( 'div.gallerytextwrapper' ).width();
- rows[ rows.length - 1 ][ rows[ rows.length - 1 ].length ] = {
- $elm: $this,
- width: $this.outerWidth(),
- imgWidth: imgWidth,
- // XXX: can divide by 0 ever happen?
- aspect: imgWidth / imgHeight,
- captionWidth: captionWidth,
- height: imgHeight
- };
-
- // Save all boundaries so we can restore them on window resize
- $this.data( 'imgWidth', imgWidth );
- $this.data( 'imgHeight', imgHeight );
- $this.data( 'width', $this.outerWidth() );
- $this.data( 'captionWidth', captionWidth );
- } );
-
- ( function () {
- var maxWidth,
- combinedAspect,
- combinedPadding,
- curRow,
- curRowHeight,
- wantedWidth,
- preferredHeight,
- newWidth,
- padding,
- $outerDiv,
- $innerDiv,
- $imageDiv,
- $imageElm,
- imageElm,
- $caption,
- i,
- j,
- avgZoom,
- totalZoom = 0;
-
- for ( i = 0; i < rows.length; i++ ) {
- maxWidth = $gallery.width();
- combinedAspect = 0;
- combinedPadding = 0;
- curRow = rows[ i ];
- curRowHeight = 0;
-
- for ( j = 0; j < curRow.length; j++ ) {
- if ( curRowHeight === 0 ) {
- if ( isFinite( curRow[ j ].height ) ) {
- // Get the height of this row, by taking the first
- // non-out of bounds height
- curRowHeight = curRow[ j ].height;
- }
- }
-
- if ( curRow[ j ].aspect === 0 || !isFinite( curRow[ j ].aspect ) ) {
- // One of the dimensions are 0. Probably should
- // not try to resize.
- combinedPadding += curRow[ j ].width;
- } else {
- combinedAspect += curRow[ j ].aspect;
- combinedPadding += curRow[ j ].width - curRow[ j ].imgWidth;
- }
- }
-
- // Add some padding for inter-element spacing.
- combinedPadding += 5 * curRow.length;
- wantedWidth = maxWidth - combinedPadding;
- preferredHeight = wantedWidth / combinedAspect;
-
- if ( preferredHeight > curRowHeight * 1.5 ) {
- // Only expand at most 1.5 times current size
- // As that's as high a resolution as we have.
- // Also on the off chance there is a bug in this
- // code, would prevent accidentally expanding to
- // be 10 billion pixels wide.
- if ( i === rows.length - 1 ) {
- // If its the last row, and we can't fit it,
- // don't make the entire row huge.
- avgZoom = ( totalZoom / ( rows.length - 1 ) ) * curRowHeight;
- if ( isFinite( avgZoom ) && avgZoom >= 1 && avgZoom <= 1.5 ) {
- preferredHeight = avgZoom;
- } else {
- // Probably a single row gallery
- preferredHeight = curRowHeight;
- }
- } else {
- preferredHeight = 1.5 * curRowHeight;
- }
- }
- if ( !isFinite( preferredHeight ) ) {
- // This *definitely* should not happen.
- // Skip this row.
- continue;
- }
- if ( preferredHeight < 5 ) {
- // Well something clearly went wrong...
- // Skip this row.
- continue;
- }
-
- if ( preferredHeight / curRowHeight > 1 ) {
- totalZoom += preferredHeight / curRowHeight;
- } else {
- // If we shrink, still consider that a zoom of 1
- totalZoom += 1;
- }
-
- for ( j = 0; j < curRow.length; j++ ) {
- newWidth = preferredHeight * curRow[ j ].aspect;
- padding = curRow[ j ].width - curRow[ j ].imgWidth;
- $outerDiv = curRow[ j ].$elm;
- $innerDiv = $outerDiv.children( 'div' ).first();
- $imageDiv = $innerDiv.children( 'div.thumb' );
- $imageElm = $imageDiv.find( 'img' ).first();
- imageElm = $imageElm.length ? $imageElm[ 0 ] : null;
- $caption = $outerDiv.find( 'div.gallerytextwrapper' );
-
- // Since we are going to re-adjust the height, the vertical
- // centering margins need to be reset.
- $imageDiv.children( 'div' ).css( 'margin', '0px auto' );
-
- if ( newWidth < 60 || !isFinite( newWidth ) ) {
- // Making something skinnier than this will mess up captions,
- if ( newWidth < 1 || !isFinite( newWidth ) ) {
- $innerDiv.height( preferredHeight );
- // Don't even try and touch the image size if it could mean
- // making it disappear.
- continue;
- }
- } else {
- $outerDiv.width( newWidth + padding );
- $innerDiv.width( newWidth + padding );
- $imageDiv.width( newWidth );
- $caption.width( curRow[ j ].captionWidth + ( newWidth - curRow[ j ].imgWidth ) );
- }
-
- if ( imageElm ) {
- // We don't always have an img, e.g. in the case of an invalid file.
- imageElm.width = newWidth;
- imageElm.height = preferredHeight;
- } else {
- // Not a file box.
- $imageDiv.height( preferredHeight );
- }
- }
- }
- }() );
- }
-
- function handleResizeStart() {
- $galleries.children( 'li' ).each( function () {
- var imgWidth = $( this ).data( 'imgWidth' ),
- imgHeight = $( this ).data( 'imgHeight' ),
- width = $( this ).data( 'width' ),
- captionWidth = $( this ).data( 'captionWidth' ),
- $innerDiv = $( this ).children( 'div' ).first(),
- $imageDiv = $innerDiv.children( 'div.thumb' ),
- $imageElm, imageElm;
-
- // Restore original sizes so we can arrange the elements as on freshly loaded page
- $( this ).width( width );
- $innerDiv.width( width );
- $imageDiv.width( imgWidth );
- $( this ).find( 'div.gallerytextwrapper' ).width( captionWidth );
-
- $imageElm = $( this ).find( 'img' ).first();
- imageElm = $imageElm.length ? $imageElm[ 0 ] : null;
- if ( imageElm ) {
- imageElm.width = imgWidth;
- imageElm.height = imgHeight;
- } else {
- $imageDiv.height( imgHeight );
- }
- } );
- }
-
- function handleResizeEnd() {
- $galleries.each( justify );
- }
-
- mw.hook( 'wikipage.content' ).add( function ( $content ) {
- if ( isTouchScreen ) {
- // Always show the caption for a touch screen.
- $content.find( 'ul.mw-gallery-packed-hover' )
- .addClass( 'mw-gallery-packed-overlay' )
- .removeClass( 'mw-gallery-packed-hover' );
- } else {
- // Note use of just "a", not a.image, since we want this to trigger if a link in
- // the caption receives focus
- $content.find( 'ul.mw-gallery-packed-hover li.gallerybox' ).on( 'focus blur', 'a', function ( e ) {
- // Confusingly jQuery leaves e.type as focusout for delegated blur events
- var gettingFocus = e.type !== 'blur' && e.type !== 'focusout';
- $( this ).closest( 'li.gallerybox' ).toggleClass( 'mw-gallery-focused', gettingFocus );
- } );
- }
-
- $galleries = $content.find( 'ul.mw-gallery-packed-overlay, ul.mw-gallery-packed-hover, ul.mw-gallery-packed' );
- // Call the justification asynchronous because live preview fires the hook with detached $content.
- setTimeout( function () {
- $galleries.each( justify );
-
- // Bind here instead of in the top scope as the callbacks use $galleries.
- if ( !bound ) {
- bound = true;
- $( window )
- .resize( $.debounce( 300, true, handleResizeStart ) )
- .resize( $.debounce( 300, handleResizeEnd ) );
- }
- } );
- } );
-}( mediaWiki, jQuery ) );