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make it possible to load/unload slides via the api

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This commit is contained in:
Hakim El Hattab
2017-11-21 15:38:44 +01:00
parent 4022cbfe84
commit a03e803628
1 changed files with 15 additions and 16 deletions
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31
js/reveal.js
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@@ -2748,10 +2748,10 @@
// Show the horizontal slide if it's within the view distance // Show the horizontal slide if it's within the view distance
if( distanceX < viewDistance ) { if( distanceX < viewDistance ) {
showSlide( horizontalSlide ); loadSlide( horizontalSlide );
} }
else { else {
hideSlide( horizontalSlide ); unloadSlide( horizontalSlide );
} }
if( verticalSlidesLength ) { if( verticalSlidesLength ) {
@@ -2764,10 +2764,10 @@
distanceY = x === ( indexh || 0 ) ? Math.abs( ( indexv || 0 ) - y ) : Math.abs( y - oy ); distanceY = x === ( indexh || 0 ) ? Math.abs( ( indexv || 0 ) - y ) : Math.abs( y - oy );
if( distanceX + distanceY < viewDistance ) { if( distanceX + distanceY < viewDistance ) {
showSlide( verticalSlide ); loadSlide( verticalSlide );
} }
else { else {
hideSlide( verticalSlide ); unloadSlide( verticalSlide );
} }
} }
@@ -3166,14 +3166,9 @@
* *
* @param {HTMLElement} slide Slide to show * @param {HTMLElement} slide Slide to show
*/ */
/** function loadSlide( slide, options ) {
* Called when the given slide is within the configured view
* distance. Shows the slide element and loads any content options = options || {};
* that is set to load lazily (data-src).
*
* @param {HTMLElement} slide Slide to show
*/
function showSlide( slide ) {
// Show the slide element // Show the slide element
slide.style.display = config.display; slide.style.display = config.display;
@@ -3253,7 +3248,7 @@
background.appendChild( video ); background.appendChild( video );
} }
// Iframes // Iframes
else if( backgroundIframe ) { else if( backgroundIframe && options.excludeIframes !== true ) {
var iframe = document.createElement( 'iframe' ); var iframe = document.createElement( 'iframe' );
iframe.setAttribute( 'allowfullscreen', '' ); iframe.setAttribute( 'allowfullscreen', '' );
iframe.setAttribute( 'mozallowfullscreen', '' ); iframe.setAttribute( 'mozallowfullscreen', '' );
@@ -3282,12 +3277,12 @@
} }
/** /**
* Called when the given slide is moved outside of the * Unloads and hides the given slide. This is called when the
* configured view distance. * slide is moved outside of the configured view distance.
* *
* @param {HTMLElement} slide * @param {HTMLElement} slide
*/ */
function hideSlide( slide ) { function unloadSlide( slide ) {
// Hide the slide element // Hide the slide element
slide.style.display = 'none'; slide.style.display = 'none';
@@ -5117,6 +5112,10 @@
isAutoSliding: isAutoSliding, isAutoSliding: isAutoSliding,
isSpeakerNotes: isSpeakerNotes, isSpeakerNotes: isSpeakerNotes,
// Slide preloading
loadSlide: loadSlide,
unloadSlide: unloadSlide,
// Adds or removes all internal event listeners (such as keyboard) // Adds or removes all internal event listeners (such as keyboard)
addEventListeners: addEventListeners, addEventListeners: addEventListeners,
removeEventListeners: removeEventListeners, removeEventListeners: removeEventListeners,