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dispatch state events after current slide has updated #2264

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This commit is contained in:
Hakim El Hattab
2018-10-26 11:29:08 +02:00
parent 6abc6e0058
commit 42e796afb2
2 changed files with 161 additions and 22 deletions
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44
js/reveal.js
View File

@@ -2671,28 +2671,6 @@
layout(); layout();
// Apply the new state
stateLoop: for( var i = 0, len = state.length; i < len; i++ ) {
// Check if this state existed on the previous slide. If it
// did, we will avoid adding it repeatedly
for( var j = 0; j < stateBefore.length; j++ ) {
if( stateBefore[j] === state[i] ) {
stateBefore.splice( j, 1 );
continue stateLoop;
}
}
document.documentElement.classList.add( state[i] );
// Dispatch custom event matching the state's name
dispatchEvent( state[i] );
}
// Clean up the remains of the previous state
while( stateBefore.length ) {
document.documentElement.classList.remove( stateBefore.pop() );
}
// Update the overview if it's currently active // Update the overview if it's currently active
if( isOverview() ) { if( isOverview() ) {
updateOverview(); updateOverview();
@@ -2741,6 +2719,28 @@
} }
} }
// Apply the new state
stateLoop: for( var i = 0, len = state.length; i < len; i++ ) {
// Check if this state existed on the previous slide. If it
// did, we will avoid adding it repeatedly
for( var j = 0; j < stateBefore.length; j++ ) {
if( stateBefore[j] === state[i] ) {
stateBefore.splice( j, 1 );
continue stateLoop;
}
}
document.documentElement.classList.add( state[i] );
// Dispatch custom event matching the state's name
dispatchEvent( state[i] );
}
// Clean up the remains of the previous state
while( stateBefore.length ) {
document.documentElement.classList.remove( stateBefore.pop() );
}
if( slideChanged ) { if( slideChanged ) {
dispatchEvent( 'slidechanged', { dispatchEvent( 'slidechanged', {
'indexh': indexh, 'indexh': indexh,

139
test/test-state.html Normal file
View File

@@ -0,0 +1,139 @@
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>reveal.js - Test State</title>
<link rel="stylesheet" href="../css/reveal.css">
<link rel="stylesheet" href="qunit-2.5.0.css">
</head>
<body style="overflow: auto;">
<div id="qunit"></div>
<div id="qunit-fixture"></div>
<div class="reveal" style="display: none;">
<div class="slides">
<section>No state</section>
<section id="slide2" data-state="state1">State 1</section>
<section data-state="state1">State 1</section>
<section data-state="state2">State 2</section>
<section>
<section>No state</section>
<section data-state="state1">State 1</section>
<section data-state="state3">State 3</section>
<section>No state</section>
</section>
<section>No state</section>
</div>
</div>
<script src="../js/reveal.js"></script>
<script src="qunit-2.5.0.js"></script>
<script>
Reveal.addEventListener( 'ready', function() {
QUnit.module( 'State' );
QUnit.test( 'Fire events when changing slide', function( assert ) {
assert.expect( 2 );
var state1 = assert.async();
var state2 = assert.async();
var _onState1 = function( event ) {
assert.ok( true, 'state1 fired' );
state1();
}
var _onState2 = function( event ) {
assert.ok( true, 'state2 fired' );
state2();
}
Reveal.addEventListener( 'state1', _onState1 );
Reveal.addEventListener( 'state2', _onState2 );
Reveal.slide( 1 );
Reveal.slide( 3 );
Reveal.removeEventListener( 'state1', _onState1 );
Reveal.removeEventListener( 'state2', _onState2 );
});
QUnit.test( 'Fire state events for vertical slides', function( assert ) {
assert.expect( 2 );
var done = assert.async( 2 );
var _onState1 = function( event ) {
assert.ok( true, 'state1 fired' );
done();
}
var _onState3 = function( event ) {
assert.ok( true, 'state3 fired' );
done();
}
Reveal.addEventListener( 'state1', _onState1 );
Reveal.addEventListener( 'state3', _onState3 );
Reveal.slide( 0 );
Reveal.slide( 4, 1 );
Reveal.slide( 4, 2 );
Reveal.removeEventListener( 'state1', _onState1 );
Reveal.removeEventListener( 'state3', _onState3 );
});
QUnit.test( 'No events if state remains unchanged', function( assert ) {
var stateChanges = 0;
var _onEvent = function( event ) {
stateChanges += 1;
}
Reveal.addEventListener( 'state1', _onEvent );
Reveal.slide( 0 ); // no state
Reveal.slide( 1 ); // state1
Reveal.slide( 2 ); // state1
Reveal.prev(); // state1
Reveal.next(); // state1
Reveal.slide( 4, 1 ); // state1
Reveal.slide( 0 ); // no state
Reveal.removeEventListener( 'state1', _onEvent );
assert.strictEqual( stateChanges, 1, 'no event was fired when going to slide with same state' );
});
QUnit.test( 'Event order', function( assert ) {
var _onEvent = function( event ) {
assert.ok( Reveal.getCurrentSlide() == document.querySelector( '#slide2' ), 'correct current slide immediately after state event' );
}
Reveal.addEventListener( 'state1', _onEvent );
Reveal.slide( 0 );
Reveal.slide( 1 );
Reveal.removeEventListener( 'state1', _onEvent );
});
} );
Reveal.initialize();
</script>
</body>
</html>