diff --git a/index.html b/index.html
index 49dbd51..7eabd5c 100644
--- a/index.html
+++ b/index.html
@@ -71,7 +71,7 @@
try pressing down.
-
+
@@ -82,14 +82,14 @@
Basement Level 2
Cornify
-
+
Basement Level 3
That's it, time to go back up.
-
+
@@ -245,7 +245,7 @@ Reveal.addEventListener( 'customevent', function() {
Set data-background="#007777"
on a slide to change the full page background to the given color. All CSS color formats are supported.
-
+
@@ -346,7 +346,7 @@ function linkify( selector ) {
Spectacular image!
-
+
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';
+ }
}
}
@@ -2149,6 +2166,19 @@ 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.
*