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auto-matching for animated media and code html elements

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This commit is contained in:
Hakim El Hattab
2020-02-03 11:35:44 +01:00
parent 452f62286b
commit b6b94739e2
2 changed files with 50 additions and 13 deletions
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42
js/reveal.js
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@ -3970,20 +3970,42 @@
*/
function findImplicitAutoAnimatePairs( fromSlide, toSlide ) {
var textSelector = 'h1, h2, h3, h4, h5, h6, p, li, span';
var pairs = [];
var fromHash = {};
toArray( fromSlide.querySelectorAll( textSelector ) ).forEach( function( element ) {
fromHash[ element.nodeName+':::'+element.textContent ] = element;
var findMatches = function( selector, serializer, transformer ) {
var fromHash = {};
toArray( fromSlide.querySelectorAll( selector ) ).forEach( function( element ) {
if( typeof transformer === 'function' ) element = transformer( element );
fromHash[ serializer( element ) ] = element;
} );
toArray( toSlide.querySelectorAll( selector ) ).forEach( function( element ) {
if( typeof transformer === 'function' ) element = transformer( element );
var fromElement = fromHash[ serializer( element ) ];
if( fromElement ) {
pairs.push([ fromElement, element ]);
}
} );
};
// Text
findMatches( 'h1, h2, h3, h4, h5, h6, p, li, span', function( node ) {
return node.nodeName + ':::' + node.innerText;
} );
toArray( toSlide.querySelectorAll( textSelector ) ).forEach( function( element ) {
var fromElement = fromHash[ element.nodeName+':::'+element.textContent ];
if( fromElement ) {
pairs.push([ fromElement, element ]);
}
// Media
findMatches( 'img, video, iframe', function( node ) {
return node.nodeName + ':::' + ( node.getAttribute( 'src' ) || node.getAttribute( 'data-src' ) );
} );
// Code
findMatches( 'pre>code', function( node ) {
return node.nodeName + ':::' + node.innerText;
}, function( element ) {
return element.parentNode;
} );
return pairs;