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Merge pull request #721 from hakimel/refactor/fragments

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Refactor fragments
This commit is contained in:
Hakim El Hattab 2013-11-25 16:56:58 -08:00
commit 7730f2bab5
6 changed files with 285 additions and 134 deletions
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297
js/reveal.js
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@ -305,7 +305,7 @@ var Reveal = (function(){
setupDOM();
// Decorate the slide DOM elements with state classes (past/future)
setupSlides();
formatSlides();
// Updates the presentation to match the current configuration values
configure();
@ -333,26 +333,6 @@ var Reveal = (function(){
}
/**
* Iterates through and decorates slides DOM elements with
* appropriate classes.
*/
function setupSlides() {
var horizontalSlides = toArray( document.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) );
horizontalSlides.forEach( function( horizontalSlide ) {
var verticalSlides = toArray( horizontalSlide.querySelectorAll( 'section' ) );
verticalSlides.forEach( function( verticalSlide, y ) {
if( y > 0 ) verticalSlide.classList.add( 'future' );
} );
} );
}
/**
* Finds and stores references to DOM elements which are
* required by the presentation. If a required element is
@ -1027,38 +1007,6 @@ var Reveal = (function(){
}
/**
* Return a sorted fragments list, ordered by an increasing
* "data-fragment-index" attribute.
*
* Fragments will be revealed in the order that they are returned by
* this function, so you can use the index attributes to control the
* order of fragment appearance.
*
* To maintain a sensible default fragment order, fragments are presumed
* to be passed in document order. This function adds a "fragment-index"
* attribute to each node if such an attribute is not already present,
* and sets that attribute to an integer value which is the position of
* the fragment within the fragments list.
*/
function sortFragments( fragments ) {
var a = toArray( fragments );
a.forEach( function( el, idx ) {
if( !el.hasAttribute( 'data-fragment-index' ) ) {
el.setAttribute( 'data-fragment-index', idx );
}
} );
a.sort( function( l, r ) {
return l.getAttribute( 'data-fragment-index' ) - r.getAttribute( 'data-fragment-index');
} );
return a;
}
/**
* Applies JavaScript-controlled layout rules to the
* presentation.
@ -1560,16 +1508,7 @@ var Reveal = (function(){
// Show fragment, if specified
if( typeof f !== 'undefined' ) {
var fragments = sortFragments( currentSlide.querySelectorAll( '.fragment' ) );
toArray( fragments ).forEach( function( fragment, indexf ) {
if( indexf < f ) {
fragment.classList.add( 'visible' );
}
else {
fragment.classList.remove( 'visible' );
}
} );
navigateFragment( f );
}
// Dispatch an event if the slide changed
@ -1652,6 +1591,8 @@ var Reveal = (function(){
// Re-create the slide backgrounds
createBackgrounds();
formatSlides();
updateControls();
updateProgress();
updateBackground( true );
@ -1659,6 +1600,30 @@ var Reveal = (function(){
}
/**
* Iterates through and decorates slides DOM elements with
* appropriate classes.
*/
function formatSlides() {
var horizontalSlides = toArray( document.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) );
horizontalSlides.forEach( function( horizontalSlide ) {
var verticalSlides = toArray( horizontalSlide.querySelectorAll( 'section' ) );
verticalSlides.forEach( function( verticalSlide, y ) {
if( y > 0 ) verticalSlide.classList.add( 'future' );
sortFragments( verticalSlide.querySelectorAll( '.fragment' ) );
} );
if( verticalSlides.length === 0 ) sortFragments( horizontalSlide.querySelectorAll( '.fragment' ) );
} );
}
/**
* Updates one dimension of slides by showing the slide
* with the specified index.
@ -1713,7 +1678,9 @@ var Reveal = (function(){
// Show all fragments on prior slides
while( pastFragments.length ) {
pastFragments.pop().classList.add( 'visible' );
var pastFragment = pastFragments.pop();
pastFragment.classList.add( 'visible' );
pastFragment.classList.remove( 'current-fragment' );
}
}
else if( i > index ) {
@ -1724,7 +1691,9 @@ var Reveal = (function(){
// No fragments in future slides should be visible ahead of time
while( futureFragments.length ) {
futureFragments.pop().classList.remove( 'visible' );
var futureFragment = futureFragments.pop();
futureFragment.classList.remove( 'visible' );
futureFragment.classList.remove( 'current-fragment' );
}
}
@ -2270,7 +2239,7 @@ var Reveal = (function(){
var hasFragments = currentSlide.querySelectorAll( '.fragment' ).length > 0;
if( hasFragments ) {
var visibleFragments = currentSlide.querySelectorAll( '.fragment.visible' );
f = visibleFragments.length;
f = visibleFragments.length - 1;
}
}
@ -2278,6 +2247,151 @@ var Reveal = (function(){
}
/**
* Return a sorted fragments list, ordered by an increasing
* "data-fragment-index" attribute.
*
* Fragments will be revealed in the order that they are returned by
* this function, so you can use the index attributes to control the
* order of fragment appearance.
*
* To maintain a sensible default fragment order, fragments are presumed
* to be passed in document order. This function adds a "fragment-index"
* attribute to each node if such an attribute is not already present,
* and sets that attribute to an integer value which is the position of
* the fragment within the fragments list.
*/
function sortFragments( fragments ) {
fragments = toArray( fragments );
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 ] );
}
} );
// 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 ++;
} );
return sorted;
}
/**
* Navigate to the specified slide fragment.
*
* @param {Number} index The index of the fragment that
* should be shown, -1 means all are invisible
* @param {Number} offset Integer offset to apply to the
* fragment index
*
* @return {Boolean} true if a change was made in any
* fragments visibility as part of this call
*/
function navigateFragment( index, offset ) {
if( currentSlide && config.fragments ) {
var fragments = sortFragments( currentSlide.querySelectorAll( '.fragment' ) );
if( fragments.length ) {
// If no index is specified, find the current
if( typeof index !== 'number' ) {
var lastVisibleFragment = sortFragments( currentSlide.querySelectorAll( '.fragment.visible' ) ).pop();
if( lastVisibleFragment ) {
index = parseInt( lastVisibleFragment.getAttribute( 'data-fragment-index' ) || 0, 10 );
}
else {
index = -1;
}
}
// If an offset is specified, apply it to the index
if( typeof offset === 'number' ) {
index += offset;
}
var fragmentsShown = [],
fragmentsHidden = [];
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' );
if( i === index ) {
element.classList.add( 'current-fragment' );
}
}
// 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( fragmentsShown.length ) {
dispatchEvent( 'fragmentshown', { fragment: fragmentsShown[0], fragments: fragmentsShown } );
}
updateControls();
return !!( fragmentsShown.length || fragmentsHidden.length );
}
}
return false;
}
/**
* Navigate to the next slide fragment.
*
@ -2286,29 +2400,7 @@ var Reveal = (function(){
*/
function nextFragment() {
if( currentSlide && config.fragments ) {
var fragments = sortFragments( currentSlide.querySelectorAll( '.fragment:not(.visible)' ) );
if( fragments.length ) {
// Find the index of the next fragment
var index = fragments[0].getAttribute( 'data-fragment-index' );
// Find all fragments with the same index
fragments = currentSlide.querySelectorAll( '.fragment[data-fragment-index="'+ index +'"]' );
toArray( fragments ).forEach( function( element ) {
element.classList.add( 'visible' );
} );
// Notify subscribers of the change
dispatchEvent( 'fragmentshown', { fragment: fragments[0], fragments: fragments } );
updateControls();
return true;
}
}
return false;
return navigateFragment( null, 1 );
}
@ -2320,29 +2412,7 @@ var Reveal = (function(){
*/
function previousFragment() {
if( currentSlide && config.fragments ) {
var fragments = sortFragments( currentSlide.querySelectorAll( '.fragment.visible' ) );
if( fragments.length ) {
// Find the index of the previous fragment
var index = fragments[ fragments.length - 1 ].getAttribute( 'data-fragment-index' );
// Find all fragments with the same index
fragments = currentSlide.querySelectorAll( '.fragment[data-fragment-index="'+ index +'"]' );
toArray( fragments ).forEach( function( f ) {
f.classList.remove( 'visible' );
} );
// Notify subscribers of the change
dispatchEvent( 'fragmenthidden', { fragment: fragments[0], fragments: fragments } );
updateControls();
return true;
}
}
return false;
return navigateFragment( null, -1 );
}
@ -3130,6 +3200,9 @@ var Reveal = (function(){
down: navigateDown,
prev: navigatePrev,
next: navigateNext,
// Fragment methods
navigateFragment: navigateFragment,
prevFragment: previousFragment,
nextFragment: nextFragment,

6
js/reveal.min.js vendored
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File diff suppressed because one or more lines are too long

2
test/test-element-attributes-markdown.html → test/test-markdown-element-attributes.html
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@ -76,7 +76,7 @@
<script src="../plugin/markdown/markdown.js"></script>
<script src="qunit-1.12.0.js"></script>
<script src="test-element-attributes-markdown.js"></script>
<script src="test-markdown-element-attributes.js"></script>
</body>
</html>

0
test/test-element-attributes-markdown.js → test/test-markdown-element-attributes.js
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21
test/test.html
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@ -35,8 +35,9 @@
</section>
</section>
<section id="fragment-slides">
<section>
<h1>4</h1>
<h1>3.1</h1>
<ul>
<li class="fragment">4.1</li>
<li class="fragment">4.2</li>
@ -44,6 +45,24 @@
</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>
<h1>4</h1>
</section>

81
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 +139,10 @@ 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 } );
Reveal.next();
deepEqual( Reveal.getIndices(), { h: 2, v: 0, f: 0 } );
@ -147,14 +151,15 @@ Reveal.addEventListener( 'ready', function() {
Reveal.next();
deepEqual( Reveal.getIndices(), { h: 2, v: 0, f: 2 } );
});
Reveal.next();
deepEqual( Reveal.getIndices(), { h: 2, v: 0, f: 3 } );
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 } );
});
@ -166,6 +171,9 @@ Reveal.addEventListener( 'ready', function() {
QUnit.module( 'Fragments' );
test( 'Sliding to fragments', function() {
Reveal.slide( 2, 0, -1 );
deepEqual( Reveal.getIndices(), { h: 2, v: 0, f: -1 }, 'Reveal.slide( 2, 0, -1 )' );
Reveal.slide( 2, 0, 0 );
deepEqual( Reveal.getIndices(), { h: 2, v: 0, f: 0 }, 'Reveal.slide( 2, 0, 0 )' );
@ -176,19 +184,45 @@ Reveal.addEventListener( 'ready', function() {
deepEqual( Reveal.getIndices(), { h: 2, v: 0, f: 1 }, 'Reveal.slide( 2, 0, 1 )' );
});
test( 'Stepping through fragments', function() {
test( 'Hiding all fragments', function() {
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 is -1' );
});
test( 'Current fragment', function() {
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' );
Reveal.slide( 2, 0, 0 );
strictEqual( fragmentSlide.querySelectorAll( '.fragment.current-fragment' ).length, 1, 'one current fragment at index 0' );
Reveal.slide( 1, 0, 0 );
strictEqual( fragmentSlide.querySelectorAll( '.fragment.current-fragment' ).length, 0, 'no current fragment when navigating to previous slide' );
Reveal.slide( 3, 0, 0 );
strictEqual( fragmentSlide.querySelectorAll( '.fragment.current-fragment' ).length, 0, 'no current fragment when navigating to next slide' );
});
test( 'Stepping through fragments', function() {
Reveal.slide( 2, 0, -1 );
// forwards:
Reveal.next();
deepEqual( Reveal.getIndices(), { h: 2, v: 0, f: 1 }, 'next() goes to next fragment' );
deepEqual( Reveal.getIndices(), { h: 2, v: 0, f: 0 }, 'next() goes to next fragment' );
Reveal.right();
deepEqual( Reveal.getIndices(), { h: 2, v: 0, f: 2 }, 'right() goes to next fragment' );
deepEqual( Reveal.getIndices(), { h: 2, v: 0, f: 1 }, 'right() goes to next fragment' );
Reveal.down();
deepEqual( Reveal.getIndices(), { h: 2, v: 0, f: 3 }, 'down() goes to next fragment' );
deepEqual( Reveal.getIndices(), { h: 2, v: 0, f: 2 }, 'down() goes to next fragment' );
Reveal.down(); // moves to f #3
@ -201,11 +235,11 @@ Reveal.addEventListener( 'ready', function() {
deepEqual( Reveal.getIndices(), { h: 2, v: 0, f: 1 }, 'left() goes to prev fragment' );
Reveal.up();
deepEqual( Reveal.getIndices(), { h: 2, v: 0, f: 0 }, 'left() 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:nth-child(1)' );
Reveal.slide( 0, 0, 0 );
equal( fragmentSlide.querySelectorAll( '.fragment.visible' ).length, 0, 'no fragments visible when on previous slide' );
@ -214,6 +248,31 @@ 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' );
});
test( 'Index generation', function() {
var fragmentSlide = document.querySelector( '#fragment-slides>section:nth-child(1)' );
// These have no indices defined to start with
equal( fragmentSlide.querySelectorAll( '.fragment' )[0].getAttribute( 'data-fragment-index' ), '0' );
equal( fragmentSlide.querySelectorAll( '.fragment' )[1].getAttribute( 'data-fragment-index' ), '1' );
equal( fragmentSlide.querySelectorAll( '.fragment' )[2].getAttribute( 'data-fragment-index' ), '2' );
});
test( 'Index normalization', function() {
var fragmentSlide = document.querySelector( '#fragment-slides>section:nth-child(3)' );
// These start out as 1-4-4 and should normalize to 0-1-1
equal( fragmentSlide.querySelectorAll( '.fragment' )[0].getAttribute( 'data-fragment-index' ), '0' );
equal( fragmentSlide.querySelectorAll( '.fragment' )[1].getAttribute( 'data-fragment-index' ), '1' );
equal( fragmentSlide.querySelectorAll( '.fragment' )[2].getAttribute( 'data-fragment-index' ), '1' );
});
asyncTest( 'fragmentshown event', function() {
expect( 2 );