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rewrite fragment sorting to account for multiple fragments with the same index

This commit is contained in:
Hakim El Hattab 2013-11-25 14:45:14 -05:00
parent ef82645589
commit 3427561b64
4 changed files with 89 additions and 35 deletions
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55
js/reveal.js
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@ -1043,27 +1043,48 @@ var Reveal = (function(){
*/
function sortFragments( fragments ) {
var a = toArray( fragments );
fragments = toArray( fragments );
// Elements that do not have an explicit `data-fragment-index`
// are given one which matches their order in the DOM
a.forEach( function( el, idx ) {
if( !el.hasAttribute( 'data-fragment-index' ) ) {
el.setAttribute( 'data-fragment-index', idx );
var ordered = [],
unordered = [],
sorted = [];
// Group ordered and unordered elements
fragments.forEach( function( fragment, i ) {
if( fragment.hasAttribute( 'data-fragment-index' ) ) {
var index = parseInt( fragment.getAttribute( 'data-fragment-index' ), 10 );
if( !ordered[index] ) {
ordered[index] = [];
}
ordered[index].push( fragment );
}
else {
unordered.push( [ fragment ] );
}
} );
a.sort( function( l, r ) {
return l.getAttribute( 'data-fragment-index' ) - r.getAttribute( 'data-fragment-index');
// Append fragments without explicit indices in their
// DOM order
ordered = ordered.concat( unordered );
// Manually count the index up per group to ensure there
// are no gaps
var index = 0;
// Push all fragments in their sorted order to an array,
// this flattens the groups
ordered.forEach( function( group ) {
group.forEach( function( fragment ) {
sorted.push( fragment );
fragment.setAttribute( 'data-fragment-index', index );
} );
index ++;
} );
// Set the indices to match the order of the sorted fragments,
// ensures that we're 0-indexed and have no gaps
a.forEach( function( el, idx ) {
el.setAttribute( 'data-fragment-index', idx );
} );
return a;
return sorted;
}
@ -3173,9 +3194,11 @@ var Reveal = (function(){
down: navigateDown,
prev: navigatePrev,
next: navigateNext,
// Fragment methods
navigateFragment: navigateFragment,
prevFragment: previousFragment,
nextFragment: nextFragment,
navigateFragment: navigateFragment,
// Deprecated aliases
navigateTo: slide,

4
js/reveal.min.js vendored
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File diff suppressed because one or more lines are too long

33
test/test.html
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@ -35,13 +35,32 @@
</section>
</section>
<section>
<h1>4</h1>
<ul>
<li class="fragment">4.1</li>
<li class="fragment">4.2</li>
<li class="fragment">4.3</li>
</ul>
<section id="fragment-slides">
<section>
<h1>3.1</h1>
<ul>
<li class="fragment">4.1</li>
<li class="fragment">4.2</li>
<li class="fragment">4.3</li>
</ul>
</section>
<section>
<h1>3.2</h1>
<ul>
<li class="fragment" data-fragment-index="0">4.1</li>
<li class="fragment" data-fragment-index="0">4.2</li>
</ul>
</section>
<section>
<h1>3.3</h1>
<ul>
<li class="fragment" data-fragment-index="1">3.3.1</li>
<li class="fragment" data-fragment-index="4">3.3.2</li>
<li class="fragment" data-fragment-index="4">3.3.3</li>
</ul>
</section>
</section>
<section>

32
test/test.js
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@ -5,6 +5,7 @@
// 1
// 2 - Three sub-slides
// 3 - Three fragment elements
// 3 - Two fragments with same data-fragment-index
// 4
@ -128,7 +129,7 @@ Reveal.addEventListener( 'ready', function() {
test( 'Reveal.next', function() {
Reveal.slide( 0, 0 );
// Step through the vertical child slides
// Step through vertical child slides
Reveal.next();
deepEqual( Reveal.getIndices(), { h: 1, v: 0, f: undefined } );
@ -138,7 +139,7 @@ Reveal.addEventListener( 'ready', function() {
Reveal.next();
deepEqual( Reveal.getIndices(), { h: 1, v: 2, f: undefined } );
// There's fragments on this slide
// Step through fragments
Reveal.next();
deepEqual( Reveal.getIndices(), { h: 2, v: 0, f: -1 } );
@ -150,11 +151,15 @@ Reveal.addEventListener( 'ready', function() {
Reveal.next();
deepEqual( Reveal.getIndices(), { h: 2, v: 0, f: 2 } );
});
test( 'Reveal.next at end', function() {
Reveal.slide( 3 );
// We're at the end, this should have no effect
Reveal.next();
deepEqual( Reveal.getIndices(), { h: 3, v: 0, f: undefined } );
// We're at the end, this should have no effect
Reveal.next();
deepEqual( Reveal.getIndices(), { h: 3, v: 0, f: undefined } );
});
@ -180,17 +185,17 @@ Reveal.addEventListener( 'ready', function() {
});
test( 'Hiding all fragments', function() {
var fragmentSlide = document.querySelector( '.reveal .slides>section:nth-child(3)' );
var fragmentSlide = document.querySelector( '#fragment-slides>section:nth-child(1)' );
Reveal.slide( 2, 0, 0 );
strictEqual( fragmentSlide.querySelectorAll( '.fragment.visible' ).length, 1, 'one fragment visible when index is 0' );
Reveal.slide( 2, 0, -1 );
strictEqual( fragmentSlide.querySelectorAll( '.fragment.visible' ).length, 0, 'no fragments visible when index 0' );
strictEqual( fragmentSlide.querySelectorAll( '.fragment.visible' ).length, 0, 'no fragments visible when index is -1' );
});
test( 'Current fragment', function() {
var fragmentSlide = document.querySelector( '.reveal .slides>section:nth-child(3)' );
var fragmentSlide = document.querySelector( '#fragment-slides>section:nth-child(1)' );
Reveal.slide( 2, 0 );
strictEqual( fragmentSlide.querySelectorAll( '.fragment.current-fragment' ).length, 0, 'no current fragment at index -1' );
@ -224,17 +229,17 @@ Reveal.addEventListener( 'ready', function() {
// backwards:
Reveal.prev();
deepEqual( Reveal.getIndices(), { h: 2, v: 0, f: 1 }, 'prev() goes to prev fragment' );
deepEqual( Reveal.getIndices(), { h: 2, v: 0, f: 2 }, 'prev() goes to prev fragment' );
Reveal.left();
deepEqual( Reveal.getIndices(), { h: 2, v: 0, f: 0 }, 'left() goes to prev fragment' );
deepEqual( Reveal.getIndices(), { h: 2, v: 0, f: 1 }, 'left() goes to prev fragment' );
Reveal.up();
deepEqual( Reveal.getIndices(), { h: 2, v: 0, f: -1 }, 'up() goes to prev fragment' );
deepEqual( Reveal.getIndices(), { h: 2, v: 0, f: 0 }, 'up() goes to prev fragment' );
});
test( 'Stepping past fragments', function() {
var fragmentSlide = document.querySelector( '.reveal .slides>section:nth-child(3)' );
var fragmentSlide = document.querySelector( '#fragment-slides>section:first-child' );
Reveal.slide( 0, 0, 0 );
equal( fragmentSlide.querySelectorAll( '.fragment.visible' ).length, 0, 'no fragments visible when on previous slide' );
@ -243,6 +248,13 @@ Reveal.addEventListener( 'ready', function() {
equal( fragmentSlide.querySelectorAll( '.fragment.visible' ).length, 3, 'all fragments visible when on future slide' );
});
test( 'Fragment indices', function() {
var fragmentSlide = document.querySelector( '#fragment-slides>section:nth-child(2)' );
Reveal.slide( 3, 0, 0 );
equal( fragmentSlide.querySelectorAll( '.fragment.visible' ).length, 2, 'both fragments of same index are shown' );
});
asyncTest( 'fragmentshown event', function() {
expect( 2 );