diff options
Diffstat (limited to 'js/reveal.js')
| -rw-r--r-- | js/reveal.js | 34 |
1 files changed, 32 insertions, 2 deletions
diff --git a/js/reveal.js b/js/reveal.js index 160b90f..524678d 100644 --- a/js/reveal.js +++ b/js/reveal.js @@ -1905,6 +1905,11 @@ var Reveal = (function(){ viewDistance = isOverview() ? 6 : 1; } + // Limit view distance on weaker devices + if( isPrintingPDF() ) { + viewDistance = Number.MAX_VALUE; + } + for( var x = 0; x < horizontalSlidesLength; x++ ) { var horizontalSlide = horizontalSlides[x]; @@ -1915,7 +1920,13 @@ var Reveal = (function(){ distanceX = Math.abs( ( indexh - x ) % ( horizontalSlidesLength - viewDistance ) ) || 0; // Show the horizontal slide if it's within the view distance - horizontalSlide.style.display = distanceX > viewDistance ? 'none' : 'block'; + if( distanceX < viewDistance ) { + horizontalSlide.style.display = 'block'; + loadSlide( horizontalSlide ); + } + else { + horizontalSlide.style.display = 'none'; + } if( verticalSlidesLength ) { @@ -1926,7 +1937,13 @@ var Reveal = (function(){ distanceY = x === indexh ? Math.abs( indexv - y ) : Math.abs( y - oy ); - verticalSlide.style.display = ( distanceX + distanceY ) > viewDistance ? 'none' : 'block'; + if( distanceX + distanceY < viewDistance ) { + verticalSlide.style.display = 'block'; + loadSlide( verticalSlide ); + } + else { + verticalSlide.style.display = 'none'; + } } } @@ -2150,6 +2167,19 @@ var Reveal = (function(){ } /** + * Loads any content that is set to load lazily (data-src) + * inside of the given slide. + */ + function loadSlide( slide ) { + + toArray( slide.querySelectorAll( 'img[data-src]' ) ).forEach( function( element ) { + element.setAttribute( 'src', element.getAttribute( 'data-src' ) ); + element.removeAttribute( 'data-src' ); + } ); + + } + + /** * Determine what available routes there are for navigation. * * @return {Object} containing four booleans: left/right/up/down |