diff options
Diffstat (limited to 'js/reveal.js')
| -rw-r--r-- | js/reveal.js | 34 |
1 files changed, 25 insertions, 9 deletions
diff --git a/js/reveal.js b/js/reveal.js index 237386d..3360255 100644 --- a/js/reveal.js +++ b/js/reveal.js @@ -19,10 +19,11 @@ var Reveal = (function(){ controls: false, progress: false, history: false, - transition: 'default', - theme: 'default', + loop: false, mouseWheel: true, - rollingLinks: true + rollingLinks: true, + transition: 'default', + theme: 'default' }, // Slides may hold a data-state attribute which we pick up and apply @@ -406,19 +407,34 @@ var Reveal = (function(){ // Select all slides and convert the NodeList result to // an array - var slides = Array.prototype.slice.call( document.querySelectorAll( selector ) ); + var slides = Array.prototype.slice.call( document.querySelectorAll( selector ) ), + slidesLength = slides.length; - if( slides.length ) { - // Enforce max and minimum index bounds - index = Math.max(Math.min(index, slides.length - 1), 0); + if( slidesLength ) { - for( var i = 0; i < slides.length; i++ ) { + // Should the index loop? + if( config.loop ) { + index %= slidesLength; + + if( index < 0 ) { + index = slidesLength + index; + } + } + + // Enforce max and minimum index bounds + index = Math.max( Math.min( index, slidesLength - 1 ), 0 ); + + for( var i = 0; i < slidesLength; i++ ) { var slide = slides[i]; // Optimization; hide all slides that are three or more steps // away from the present slide if( overviewIsActive() === false ) { - slide.style.display = Math.abs( index - i ) > 3 ? 'none' : 'block'; + // The distance loops so that it measures 1 between the first + // and last slides + var distance = Math.abs( ( index - i ) % ( slidesLength - 3 ) ) || 0; + + slide.style.display = distance > 3 ? 'none' : 'block'; } slides[i].classList.remove( 'past' ); |