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Code Issues Packages Projects Releases Wiki Activity

fix #1590

edit
Hakim El Hattab 2018-10-11 11:24:54 +02:00
parent 62cd74a890
commit a4dc1c6440
2 changed files with 81 additions and 36 deletions
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111
js/reveal.js
View File

@ -2766,6 +2766,7 @@
updateParallax();
updateSlideNumber();
updateNotes();
updateFragments();
// Update the URL hash
writeURL();
@ -4405,6 +4406,73 @@
}
/**
* Refreshes the fragments on the current slide so that they
* have the appropriate classes (.visible + .current-fragment).
*
* @param {number} [index] The index of the current fragment
* @param {array} [fragments] Array containing all fragments
* in the current slide
*
* @return {{shown: array, hidden: array}}
*/
function updateFragments( index, fragments ) {
var changedFragments = {
shown: [],
hidden: []
};
if( currentSlide && config.fragments ) {
fragments = fragments || sortFragments( currentSlide.querySelectorAll( '.fragment' ) );
if( fragments.length ) {
if( typeof index !== 'number' ) {
var currentFragment = sortFragments( currentSlide.querySelectorAll( '.fragment.visible' ) ).pop();
if( currentFragment ) {
index = parseInt( currentFragment.getAttribute( 'data-fragment-index' ) || 0, 10 );
}
}
toArray( fragments ).forEach( function( el, i ) {
if( el.hasAttribute( 'data-fragment-index' ) ) {
i = parseInt( el.getAttribute( 'data-fragment-index' ), 10 );
}
// Visible fragments
if( i <= index ) {
if( !el.classList.contains( 'visible' ) ) changedFragments.shown.push( el );
el.classList.add( 'visible' );
el.classList.remove( 'current-fragment' );
// Announce the fragments one by one to the Screen Reader
dom.statusDiv.textContent = getStatusText( el );
if( i === index ) {
el.classList.add( 'current-fragment' );
startEmbeddedContent( el );
}
}
// Hidden fragments
else {
if( el.classList.contains( 'visible' ) ) changedFragments.hidden.push( el );
el.classList.remove( 'visible' );
el.classList.remove( 'current-fragment' );
}
} );
}
}
return changedFragments;
}
/**
* Navigate to the specified slide fragment.
*
@ -4440,53 +4508,24 @@
index += offset;
}
var fragmentsShown = [],
fragmentsHidden = [];
var changedFragments = updateFragments( index, fragments );
toArray( fragments ).forEach( function( element, i ) {
if( element.hasAttribute( 'data-fragment-index' ) ) {
i = parseInt( element.getAttribute( 'data-fragment-index' ), 10 );
}
// Visible fragments
if( i <= index ) {
if( !element.classList.contains( 'visible' ) ) fragmentsShown.push( element );
element.classList.add( 'visible' );
element.classList.remove( 'current-fragment' );
// Announce the fragments one by one to the Screen Reader
dom.statusDiv.textContent = getStatusText( element );
if( i === index ) {
element.classList.add( 'current-fragment' );
startEmbeddedContent( element );
}
}
// Hidden fragments
else {
if( element.classList.contains( 'visible' ) ) fragmentsHidden.push( element );
element.classList.remove( 'visible' );
element.classList.remove( 'current-fragment' );
}
} );
if( fragmentsHidden.length ) {
dispatchEvent( 'fragmenthidden', { fragment: fragmentsHidden[0], fragments: fragmentsHidden } );
if( changedFragments.hidden.length ) {
dispatchEvent( 'fragmenthidden', { fragment: changedFragments.hidden[0], fragments: changedFragments.hidden } );
}
if( fragmentsShown.length ) {
dispatchEvent( 'fragmentshown', { fragment: fragmentsShown[0], fragments: fragmentsShown } );
if( changedFragments.shown.length ) {
dispatchEvent( 'fragmentshown', { fragment: changedFragments.shown[0], fragments: changedFragments.shown } );
}
updateControls();
updateProgress();
if( config.fragmentInURL ) {
writeURL();
}
return !!( fragmentsShown.length || fragmentsHidden.length );
return !!( changedFragments.shown.length || changedFragments.hidden.length );
}

6
test/test.js
View File

@ -262,6 +262,8 @@ Reveal.addEventListener( 'ready', function() {
QUnit.test( 'Current fragment', function( assert ) {
var fragmentSlide = document.querySelector( '#fragment-slides>section:nth-child(1)' );
var fragments = fragmentSlide.querySelectorAll( '.fragment' );
var lastFragmentIndex = fragments[ fragments.length - 1 ].getAttribute( 'data-fragment-index' );
Reveal.slide( 2, 0 );
assert.strictEqual( fragmentSlide.querySelectorAll( '.fragment.current-fragment' ).length, 0, 'no current fragment at index -1' );
@ -274,6 +276,10 @@ Reveal.addEventListener( 'ready', function() {
Reveal.slide( 3, 0, 0 );
assert.strictEqual( fragmentSlide.querySelectorAll( '.fragment.current-fragment' ).length, 0, 'no current fragment when navigating to next slide' );
Reveal.slide( 2, 1, -1 );
Reveal.prev();
assert.strictEqual( fragmentSlide.querySelector( '.fragment.current-fragment' ).getAttribute( 'data-fragment-index' ), lastFragmentIndex, 'last fragment is current fragment when returning from future slide' );
});
QUnit.test( 'Stepping through fragments', function( assert ) {