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autoplay support for content inside of fragments

This commit is contained in:
Hakim El Hattab 2016-09-20 13:41:38 +02:00
parent bc4fc65da4
commit 79728e25cd
1 changed files with 56 additions and 8 deletions
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64
js/reveal.js
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@ -1242,6 +1242,42 @@
}
/**
* Find the closest parent that matches the given
* selector.
*
* @param {HTMLElement} target The child element
* @param {String} selector The CSS selector to match
* the parents against
*
* @return {HTMLElement} The matched parent or null
* if no matching parent was found
*/
function closestParent( target, selector ) {
var parent = target.parentNode;
while( parent ) {
// There's some overhead doing this each time, we don't
// want to rewrite the element prototype but should still
// be enough to feature detect once at startup...
var matchesMethod = parent.matches || parent.matchesSelector || parent.msMatchesSelector;
// If we find a match, we're all set
if( matchesMethod && matchesMethod.call( parent, selector ) ) {
return parent;
}
// Keep searching
parent = parent.parentNode;
}
return null;
}
/**
* Converts various color input formats to an {r:0,g:0,b:0} object.
*
@ -3046,32 +3082,44 @@
/**
* Start playback of any embedded content inside of
* the targeted slide.
* the given element.
*/
function startEmbeddedContent( slide ) {
function startEmbeddedContent( element ) {
if( slide && !isSpeakerNotes() ) {
if( element && !isSpeakerNotes() ) {
// Restart GIFs
toArray( slide.querySelectorAll( 'img[src$=".gif"]' ) ).forEach( function( el ) {
toArray( element.querySelectorAll( 'img[src$=".gif"]' ) ).forEach( function( el ) {
// Setting the same unchanged source like this was confirmed
// to work in Chrome, FF & Safari
el.setAttribute( 'src', el.getAttribute( 'src' ) );
} );
// HTML5 media elements
toArray( slide.querySelectorAll( 'video, audio' ) ).forEach( function( el ) {
toArray( element.querySelectorAll( 'video, audio' ) ).forEach( function( el ) {
if( closestParent( el, '.fragment' ) && !closestParent( el, '.fragment.visible' ) ) {
return;
}
if( el.hasAttribute( 'data-autoplay' ) && typeof el.play === 'function' ) {
el.play();
}
} );
// Normal iframes
toArray( slide.querySelectorAll( 'iframe[src]' ) ).forEach( function( el ) {
toArray( element.querySelectorAll( 'iframe[src]' ) ).forEach( function( el ) {
if( closestParent( el, '.fragment' ) && !closestParent( el, '.fragment.visible' ) ) {
return;
}
startEmbeddedIframe( { target: el } );
} );
// Lazy loading iframes
toArray( slide.querySelectorAll( 'iframe[data-src]' ) ).forEach( function( el ) {
toArray( element.querySelectorAll( 'iframe[data-src]' ) ).forEach( function( el ) {
if( closestParent( el, '.fragment' ) && !closestParent( el, '.fragment.visible' ) ) {
return;
}
if( el.getAttribute( 'src' ) !== el.getAttribute( 'data-src' ) ) {
el.removeEventListener( 'load', startEmbeddedIframe ); // remove first to avoid dupes
el.addEventListener( 'load', startEmbeddedIframe );
@ -3622,6 +3670,7 @@
if( i === index ) {
element.classList.add( 'current-fragment' );
startEmbeddedContent( element );
}
}
// Hidden fragments
@ -3631,7 +3680,6 @@
element.classList.remove( 'current-fragment' );
}
} );
if( fragmentsHidden.length ) {