refactor fragment pdf exporting to support multiple fragments with same index #1955
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js/reveal.js
52
js/reveal.js
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@ -794,31 +794,43 @@
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// Copy page and show fragments one after another
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if( config.pdfSeparateFragments ) {
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var numberOfFragments = toArray( page.querySelectorAll( '.fragment' ) ).length;
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// Each fragment 'group' is an array containing one or more
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// fragments. Multiple fragments that appear at the same time
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// are part of the same group.
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var fragmentGroups = sortFragments( page.querySelectorAll( '.fragment' ), true );
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for( var currentFragment = 0; currentFragment < numberOfFragments; currentFragment++ ) {
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var previousFragmentStep;
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var previousPage;
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var clonedPage = page.cloneNode( true );
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page.parentNode.insertBefore( clonedPage, page.nextSibling );
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fragmentGroups.forEach( function( fragments ) {
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toArray( sortFragments( clonedPage.querySelectorAll( '.fragment' ) ) ).forEach( function( fragment, fragmentIndex ) {
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if( fragmentIndex < currentFragment ) {
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fragment.classList.add( 'visible' );
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// Remove 'current-fragment' from the previous group
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if( previousFragmentStep ) {
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previousFragmentStep.forEach( function( fragment ) {
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fragment.classList.remove( 'current-fragment' );
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}
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else if( fragmentIndex === currentFragment ) {
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fragment.classList.add( 'visible', 'current-fragment' );
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}
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else {
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fragment.classList.remove( 'visible', 'current-fragment' );
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}
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} );
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}
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// Show the fragments for the current index
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fragments.forEach( function( fragment ) {
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fragment.classList.add( 'visible', 'current-fragment' );
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} );
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page = clonedPage;
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// Create a separate page for the current fragment state
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var clonedPage = page.cloneNode( true );
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page.parentNode.insertBefore( clonedPage, ( previousPage || page ).nextSibling );
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}
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previousFragmentStep = fragments;
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previousPage = clonedPage;
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} );
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// Reset the first/original page so that all fragments are hidden
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fragmentGroups.forEach( function( fragments ) {
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fragments.forEach( function( fragment ) {
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fragment.classList.remove( 'visible', 'current-fragment' );
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} );
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} );
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}
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// Show all fragments
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@ -4223,9 +4235,11 @@
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* the fragment within the fragments list.
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*
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* @param {object[]|*} fragments
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* @param {boolean} grouped If true the returned array will contain
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* nested arrays for all fragments with the same index
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* @return {object[]} sorted Sorted array of fragments
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*/
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function sortFragments( fragments ) {
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function sortFragments( fragments, grouped ) {
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fragments = toArray( fragments );
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@ -4268,7 +4282,7 @@
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index ++;
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} );
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return sorted;
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return grouped === true ? ordered : sorted;
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}
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