2823 lines
75 KiB
JavaScript
2823 lines
75 KiB
JavaScript
import SlideContent from './controllers/slidecontent.js'
|
||
import SlideNumber from './controllers/slidenumber.js'
|
||
import Backgrounds from './controllers/backgrounds.js'
|
||
import AutoAnimate from './controllers/autoanimate.js'
|
||
import Fragments from './controllers/fragments.js'
|
||
import Overview from './controllers/overview.js'
|
||
import Keyboard from './controllers/keyboard.js'
|
||
import Location from './controllers/location.js'
|
||
import Plugins from './controllers/plugins.js'
|
||
import Print from './controllers/print.js'
|
||
import Touch from './controllers/touch.js'
|
||
import Notes from './controllers/notes.js'
|
||
import Playback from './components/playback.js'
|
||
import defaultConfig from './config.js'
|
||
import { isMobile, isChrome, isAndroid, supportsZoom } from './utils/device.js'
|
||
import {
|
||
SLIDES_SELECTOR,
|
||
HORIZONTAL_SLIDES_SELECTOR,
|
||
VERTICAL_SLIDES_SELECTOR,
|
||
POST_MESSAGE_METHOD_BLACKLIST
|
||
} from './utils/constants.js'
|
||
import {
|
||
extend,
|
||
toArray,
|
||
deserialize,
|
||
transformElement,
|
||
createSingletonNode,
|
||
closestParent,
|
||
getQueryHash
|
||
} from './utils/util.js'
|
||
|
||
/**
|
||
* reveal.js
|
||
* http://revealjs.com
|
||
* MIT licensed
|
||
*
|
||
* Copyright (C) 2020 Hakim El Hattab, https://hakim.se
|
||
*/
|
||
export default function( revealElement, options ) {
|
||
|
||
const Reveal = {};
|
||
|
||
// The reveal.js version
|
||
const VERSION = '4.0.0-dev';
|
||
|
||
// Configuration defaults, can be overridden at initialization time
|
||
let config,
|
||
|
||
// Flags if reveal.js is loaded (has dispatched the 'ready' event)
|
||
ready = false,
|
||
|
||
// The horizontal and vertical index of the currently active slide
|
||
indexh,
|
||
indexv,
|
||
|
||
// The previous and current slide HTML elements
|
||
previousSlide,
|
||
currentSlide,
|
||
|
||
// Remember which directions that the user has navigated towards
|
||
hasNavigatedHorizontally = false,
|
||
hasNavigatedVertically = false,
|
||
|
||
// Slides may hold a data-state attribute which we pick up and apply
|
||
// as a class to the body. This list contains the combined state of
|
||
// all current slides.
|
||
state = [],
|
||
|
||
// The current scale of the presentation (see width/height config)
|
||
scale = 1,
|
||
|
||
// Controllers for different aspects of our presentation. They're
|
||
// all given direct references to this Reveal instance since there
|
||
// may be multiple presentations running in parallel.
|
||
slideContent = new SlideContent( Reveal ),
|
||
slideNumber = new SlideNumber( Reveal ),
|
||
autoAnimate = new AutoAnimate( Reveal ),
|
||
backgrounds = new Backgrounds( Reveal ),
|
||
fragments = new Fragments( Reveal ),
|
||
overview = new Overview( Reveal ),
|
||
keyboard = new Keyboard( Reveal ),
|
||
location = new Location( Reveal ),
|
||
plugins = new Plugins( Reveal ),
|
||
print = new Print( Reveal ),
|
||
touch = new Touch( Reveal ),
|
||
notes = new Notes( Reveal ),
|
||
|
||
// CSS transform that is currently applied to the slides container,
|
||
// split into two groups
|
||
slidesTransform = { layout: '', overview: '' },
|
||
|
||
// Cached references to DOM elements
|
||
dom = {},
|
||
|
||
// List of asynchronously loaded reveal.js dependencies
|
||
asyncDependencies = [],
|
||
|
||
// Throttles mouse wheel navigation
|
||
lastMouseWheelStep = 0,
|
||
|
||
// Is the mouse pointer currently hidden from view
|
||
cursorHidden = false,
|
||
|
||
// Timeout used to determine when the cursor is inactive
|
||
cursorInactiveTimeout = 0,
|
||
|
||
// Flags if the interaction event listeners are bound
|
||
eventsAreBound = false,
|
||
|
||
// The current auto-slide duration
|
||
autoSlide = 0,
|
||
|
||
// Auto slide properties
|
||
autoSlidePlayer,
|
||
autoSlideTimeout = 0,
|
||
autoSlideStartTime = -1,
|
||
autoSlidePaused = false;
|
||
|
||
/**
|
||
* Starts up the presentation if the client is capable.
|
||
*/
|
||
function initialize() {
|
||
|
||
if( !revealElement ) {
|
||
console.warn( 'reveal.js can not initialize without a valid .reveal element.' );
|
||
return;
|
||
}
|
||
|
||
// Cache references to key DOM elements
|
||
dom.wrapper = revealElement;
|
||
dom.slides = revealElement.querySelector( '.slides' );
|
||
|
||
// Force a layout when the whole page, incl fonts, has loaded
|
||
window.addEventListener( 'load', layout, false );
|
||
|
||
// Copy options over to our config object
|
||
config = { ...defaultConfig, ...options, ...getQueryHash() };
|
||
|
||
// Load plugins then move on to #start()
|
||
plugins.load( config.dependencies ).then( start )
|
||
|
||
return new Promise( resolve => Reveal.addEventListener( 'ready', resolve ) );
|
||
|
||
}
|
||
|
||
/**
|
||
* Starts up reveal.js by binding input events and navigating
|
||
* to the current URL deeplink if there is one.
|
||
*/
|
||
function start() {
|
||
|
||
ready = true;
|
||
|
||
// Make sure we've got all the DOM elements we need
|
||
setupDOM();
|
||
|
||
// Listen to messages posted to this window
|
||
setupPostMessage();
|
||
|
||
// Prevent the slides from being scrolled out of view
|
||
setupScrollPrevention();
|
||
|
||
// Resets all vertical slides so that only the first is visible
|
||
resetVerticalSlides();
|
||
|
||
// Updates the presentation to match the current configuration values
|
||
configure();
|
||
|
||
// Read the initial hash
|
||
location.readURL();
|
||
|
||
// Create slide backgrounds
|
||
backgrounds.update( true );
|
||
|
||
// Notify listeners that the presentation is ready but use a 1ms
|
||
// timeout to ensure it's not fired synchronously after #initialize()
|
||
setTimeout( () => {
|
||
// Enable transitions now that we're loaded
|
||
dom.slides.classList.remove( 'no-transition' );
|
||
|
||
dom.wrapper.classList.add( 'ready' );
|
||
|
||
dispatchEvent({
|
||
type: 'ready',
|
||
data: {
|
||
indexh,
|
||
indexv,
|
||
currentSlide
|
||
}
|
||
});
|
||
}, 1 );
|
||
|
||
// Special setup and config is required when printing to PDF
|
||
if( print.isPrintingPDF() ) {
|
||
removeEventListeners();
|
||
|
||
// The document needs to have loaded for the PDF layout
|
||
// measurements to be accurate
|
||
if( document.readyState === 'complete' ) {
|
||
print.setupPDF();
|
||
}
|
||
else {
|
||
window.addEventListener( 'load', print.setupPDF );
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Finds and stores references to DOM elements which are
|
||
* required by the presentation. If a required element is
|
||
* not found, it is created.
|
||
*/
|
||
function setupDOM() {
|
||
|
||
// Prevent transitions while we're loading
|
||
dom.slides.classList.add( 'no-transition' );
|
||
|
||
if( isMobile ) {
|
||
dom.wrapper.classList.add( 'no-hover' );
|
||
}
|
||
else {
|
||
dom.wrapper.classList.remove( 'no-hover' );
|
||
}
|
||
|
||
// Background element
|
||
dom.background = createSingletonNode( dom.wrapper, 'div', 'backgrounds', null );
|
||
|
||
// Progress bar
|
||
dom.progress = createSingletonNode( dom.wrapper, 'div', 'progress', '<span></span>' );
|
||
dom.progressbar = dom.progress.querySelector( 'span' );
|
||
|
||
// Arrow controls
|
||
dom.controls = createSingletonNode( dom.wrapper, 'aside', 'controls',
|
||
`<button class="navigate-left" aria-label="${ config.rtl ? 'next slide' : 'previous slide' }"><div class="controls-arrow"></div></button>
|
||
<button class="navigate-right" aria-label="${ config.rtl ? 'previous slide' : 'next slide' }"><div class="controls-arrow"></div></button>
|
||
<button class="navigate-up" aria-label="above slide"><div class="controls-arrow"></div></button>
|
||
<button class="navigate-down" aria-label="below slide"><div class="controls-arrow"></div></button>` );
|
||
|
||
// Slide number
|
||
slideNumber.render();
|
||
|
||
// Slide notes
|
||
notes.render();
|
||
|
||
// Overlay graphic which is displayed during the paused mode
|
||
dom.pauseOverlay = createSingletonNode( dom.wrapper, 'div', 'pause-overlay', config.controls ? '<button class="resume-button">Resume presentation</button>' : null );
|
||
|
||
dom.wrapper.setAttribute( 'role', 'application' );
|
||
|
||
// There can be multiple instances of controls throughout the page
|
||
dom.controlsLeft = toArray( dom.wrapper.querySelectorAll( '.navigate-left' ) );
|
||
dom.controlsRight = toArray( dom.wrapper.querySelectorAll( '.navigate-right' ) );
|
||
dom.controlsUp = toArray( dom.wrapper.querySelectorAll( '.navigate-up' ) );
|
||
dom.controlsDown = toArray( dom.wrapper.querySelectorAll( '.navigate-down' ) );
|
||
dom.controlsPrev = toArray( dom.wrapper.querySelectorAll( '.navigate-prev' ) );
|
||
dom.controlsNext = toArray( dom.wrapper.querySelectorAll( '.navigate-next' ) );
|
||
|
||
// The left, right and down arrows in the standard reveal.js controls
|
||
dom.controlsRightArrow = dom.controls.querySelector( '.navigate-right' );
|
||
dom.controlsLeftArrow = dom.controls.querySelector( '.navigate-left' );
|
||
dom.controlsDownArrow = dom.controls.querySelector( '.navigate-down' );
|
||
|
||
dom.statusElement = createStatusElement();
|
||
}
|
||
|
||
/**
|
||
* Creates a hidden div with role aria-live to announce the
|
||
* current slide content. Hide the div off-screen to make it
|
||
* available only to Assistive Technologies.
|
||
*
|
||
* @return {HTMLElement}
|
||
*/
|
||
function createStatusElement() {
|
||
|
||
let statusElement = dom.wrapper.querySelector( '.aria-status' );
|
||
if( !statusElement ) {
|
||
statusElement = document.createElement( 'div' );
|
||
statusElement.style.position = 'absolute';
|
||
statusElement.style.height = '1px';
|
||
statusElement.style.width = '1px';
|
||
statusElement.style.overflow = 'hidden';
|
||
statusElement.style.clip = 'rect( 1px, 1px, 1px, 1px )';
|
||
statusElement.classList.add( 'aria-status' );
|
||
statusElement.setAttribute( 'aria-live', 'polite' );
|
||
statusElement.setAttribute( 'aria-atomic','true' );
|
||
dom.wrapper.appendChild( statusElement );
|
||
}
|
||
return statusElement;
|
||
|
||
}
|
||
|
||
/**
|
||
* Announces the given text to screen readers.
|
||
*/
|
||
function announceStatus( value ) {
|
||
|
||
dom.statusElement.textContent = value;
|
||
|
||
}
|
||
|
||
/**
|
||
* Converts the given HTML element into a string of text
|
||
* that can be announced to a screen reader. Hidden
|
||
* elements are excluded.
|
||
*/
|
||
function getStatusText( node ) {
|
||
|
||
let text = '';
|
||
|
||
// Text node
|
||
if( node.nodeType === 3 ) {
|
||
text += node.textContent;
|
||
}
|
||
// Element node
|
||
else if( node.nodeType === 1 ) {
|
||
|
||
let isAriaHidden = node.getAttribute( 'aria-hidden' );
|
||
let isDisplayHidden = window.getComputedStyle( node )['display'] === 'none';
|
||
if( isAriaHidden !== 'true' && !isDisplayHidden ) {
|
||
|
||
toArray( node.childNodes ).forEach( child => {
|
||
text += getStatusText( child );
|
||
} );
|
||
|
||
}
|
||
|
||
}
|
||
|
||
text = text.trim();
|
||
|
||
return text === '' ? '' : text + ' ';
|
||
|
||
}
|
||
|
||
/**
|
||
* This is an unfortunate necessity. Some actions – such as
|
||
* an input field being focused in an iframe or using the
|
||
* keyboard to expand text selection beyond the bounds of
|
||
* a slide – can trigger our content to be pushed out of view.
|
||
* This scrolling can not be prevented by hiding overflow in
|
||
* CSS (we already do) so we have to resort to repeatedly
|
||
* checking if the slides have been offset :(
|
||
*/
|
||
function setupScrollPrevention() {
|
||
|
||
setInterval( () => {
|
||
if( dom.wrapper.scrollTop !== 0 || dom.wrapper.scrollLeft !== 0 ) {
|
||
dom.wrapper.scrollTop = 0;
|
||
dom.wrapper.scrollLeft = 0;
|
||
}
|
||
}, 1000 );
|
||
|
||
}
|
||
|
||
/**
|
||
* Registers a listener to postMessage events, this makes it
|
||
* possible to call all reveal.js API methods from another
|
||
* window. For example:
|
||
*
|
||
* revealWindow.postMessage( JSON.stringify({
|
||
* method: 'slide',
|
||
* args: [ 2 ]
|
||
* }), '*' );
|
||
*/
|
||
function setupPostMessage() {
|
||
|
||
if( config.postMessage ) {
|
||
window.addEventListener( 'message', event => {
|
||
let data = event.data;
|
||
|
||
// Make sure we're dealing with JSON
|
||
if( typeof data === 'string' && data.charAt( 0 ) === '{' && data.charAt( data.length - 1 ) === '}' ) {
|
||
data = JSON.parse( data );
|
||
|
||
// Check if the requested method can be found
|
||
if( data.method && typeof Reveal[data.method] === 'function' ) {
|
||
|
||
if( POST_MESSAGE_METHOD_BLACKLIST.test( data.method ) === false ) {
|
||
|
||
const result = Reveal[data.method].apply( Reveal, data.args );
|
||
|
||
// Dispatch a postMessage event with the returned value from
|
||
// our method invocation for getter functions
|
||
dispatchPostMessage( 'callback', { method: data.method, result: result } );
|
||
|
||
}
|
||
else {
|
||
console.warn( 'reveal.js: "'+ data.method +'" is is blacklisted from the postMessage API' );
|
||
}
|
||
|
||
}
|
||
}
|
||
}, false );
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Applies the configuration settings from the config
|
||
* object. May be called multiple times.
|
||
*
|
||
* @param {object} options
|
||
*/
|
||
function configure( options ) {
|
||
|
||
const oldConfig = { ...config }
|
||
|
||
// New config options may be passed when this method
|
||
// is invoked through the API after initialization
|
||
if( typeof options === 'object' ) extend( config, options );
|
||
|
||
// Abort if reveal.js hasn't finished loading, config
|
||
// changes will be applied automatically once ready
|
||
if( Reveal.isReady() === false ) return;
|
||
|
||
const numberOfSlides = dom.wrapper.querySelectorAll( SLIDES_SELECTOR ).length;
|
||
|
||
// The transition is added as a class on the .reveal element
|
||
dom.wrapper.classList.remove( oldConfig.transition );
|
||
dom.wrapper.classList.add( config.transition );
|
||
|
||
dom.wrapper.setAttribute( 'data-transition-speed', config.transitionSpeed );
|
||
dom.wrapper.setAttribute( 'data-background-transition', config.backgroundTransition );
|
||
|
||
dom.controls.style.display = config.controls ? 'block' : 'none';
|
||
dom.progress.style.display = config.progress ? 'block' : 'none';
|
||
|
||
dom.controls.setAttribute( 'data-controls-layout', config.controlsLayout );
|
||
dom.controls.setAttribute( 'data-controls-back-arrows', config.controlsBackArrows );
|
||
|
||
if( config.shuffle ) {
|
||
shuffle();
|
||
}
|
||
|
||
if( config.rtl ) {
|
||
dom.wrapper.classList.add( 'rtl' );
|
||
}
|
||
else {
|
||
dom.wrapper.classList.remove( 'rtl' );
|
||
}
|
||
|
||
if( config.center ) {
|
||
dom.wrapper.classList.add( 'center' );
|
||
}
|
||
else {
|
||
dom.wrapper.classList.remove( 'center' );
|
||
}
|
||
|
||
// Exit the paused mode if it was configured off
|
||
if( config.pause === false ) {
|
||
resume();
|
||
}
|
||
|
||
if( config.mouseWheel ) {
|
||
document.addEventListener( 'DOMMouseScroll', onDocumentMouseScroll, false ); // FF
|
||
document.addEventListener( 'mousewheel', onDocumentMouseScroll, false );
|
||
}
|
||
else {
|
||
document.removeEventListener( 'DOMMouseScroll', onDocumentMouseScroll, false ); // FF
|
||
document.removeEventListener( 'mousewheel', onDocumentMouseScroll, false );
|
||
}
|
||
|
||
// Auto-hide the mouse pointer when its inactive
|
||
if( config.hideInactiveCursor ) {
|
||
document.addEventListener( 'mousemove', onDocumentCursorActive, false );
|
||
document.addEventListener( 'mousedown', onDocumentCursorActive, false );
|
||
}
|
||
else {
|
||
showCursor();
|
||
|
||
document.removeEventListener( 'mousemove', onDocumentCursorActive, false );
|
||
document.removeEventListener( 'mousedown', onDocumentCursorActive, false );
|
||
}
|
||
|
||
// Iframe link previews
|
||
if( config.previewLinks ) {
|
||
enablePreviewLinks();
|
||
disablePreviewLinks( '[data-preview-link=false]' );
|
||
}
|
||
else {
|
||
disablePreviewLinks();
|
||
enablePreviewLinks( '[data-preview-link]:not([data-preview-link=false])' );
|
||
}
|
||
|
||
// Reset all changes made by auto-animations
|
||
autoAnimate.reset();
|
||
|
||
// Remove existing auto-slide controls
|
||
if( autoSlidePlayer ) {
|
||
autoSlidePlayer.destroy();
|
||
autoSlidePlayer = null;
|
||
}
|
||
|
||
// Generate auto-slide controls if needed
|
||
if( numberOfSlides > 1 && config.autoSlide && config.autoSlideStoppable ) {
|
||
autoSlidePlayer = new Playback( dom.wrapper, () => {
|
||
return Math.min( Math.max( ( Date.now() - autoSlideStartTime ) / autoSlide, 0 ), 1 );
|
||
} );
|
||
|
||
autoSlidePlayer.on( 'click', onAutoSlidePlayerClick );
|
||
autoSlidePaused = false;
|
||
}
|
||
|
||
// Add the navigation mode to the DOM so we can adjust styling
|
||
if( config.navigationMode !== 'default' ) {
|
||
dom.wrapper.setAttribute( 'data-navigation-mode', config.navigationMode );
|
||
}
|
||
else {
|
||
dom.wrapper.removeAttribute( 'data-navigation-mode' );
|
||
}
|
||
|
||
notes.configure( config, oldConfig );
|
||
fragments.configure( config, oldConfig );
|
||
slideNumber.configure( config, oldConfig );
|
||
keyboard.configure( config, oldConfig );
|
||
|
||
sync();
|
||
|
||
}
|
||
|
||
/**
|
||
* Binds all event listeners.
|
||
*/
|
||
function addEventListeners() {
|
||
|
||
eventsAreBound = true;
|
||
|
||
window.addEventListener( 'hashchange', onWindowHashChange, false );
|
||
window.addEventListener( 'resize', onWindowResize, false );
|
||
|
||
if( config.touch ) touch.bind();
|
||
if( config.keyboard ) keyboard.bind();
|
||
|
||
if( config.progress && dom.progress ) {
|
||
dom.progress.addEventListener( 'click', onProgressClicked, false );
|
||
}
|
||
|
||
dom.pauseOverlay.addEventListener( 'click', resume, false );
|
||
|
||
if( config.focusBodyOnPageVisibilityChange ) {
|
||
document.addEventListener( 'visibilitychange', onPageVisibilityChange, false );
|
||
}
|
||
|
||
// Listen to both touch and click events, in case the device
|
||
// supports both
|
||
let pointerEvents = [ 'touchstart', 'click' ];
|
||
|
||
// Only support touch for Android, fixes double navigations in
|
||
// stock browser
|
||
if( isAndroid ) {
|
||
pointerEvents = [ 'touchstart' ];
|
||
}
|
||
|
||
pointerEvents.forEach( eventName => {
|
||
dom.controlsLeft.forEach( el => el.addEventListener( eventName, onNavigateLeftClicked, false ) );
|
||
dom.controlsRight.forEach( el => el.addEventListener( eventName, onNavigateRightClicked, false ) );
|
||
dom.controlsUp.forEach( el => el.addEventListener( eventName, onNavigateUpClicked, false ) );
|
||
dom.controlsDown.forEach( el => el.addEventListener( eventName, onNavigateDownClicked, false ) );
|
||
dom.controlsPrev.forEach( el => el.addEventListener( eventName, onNavigatePrevClicked, false ) );
|
||
dom.controlsNext.forEach( el => el.addEventListener( eventName, onNavigateNextClicked, false ) );
|
||
} );
|
||
|
||
}
|
||
|
||
/**
|
||
* Unbinds all event listeners.
|
||
*/
|
||
function removeEventListeners() {
|
||
|
||
eventsAreBound = false;
|
||
|
||
touch.unbind();
|
||
keyboard.unbind();
|
||
|
||
window.removeEventListener( 'hashchange', onWindowHashChange, false );
|
||
window.removeEventListener( 'resize', onWindowResize, false );
|
||
|
||
dom.pauseOverlay.removeEventListener( 'click', resume, false );
|
||
|
||
if ( config.progress && dom.progress ) {
|
||
dom.progress.removeEventListener( 'click', onProgressClicked, false );
|
||
}
|
||
|
||
[ 'touchstart', 'click' ].forEach( eventName => {
|
||
dom.controlsLeft.forEach( el => el.removeEventListener( eventName, onNavigateLeftClicked, false ) );
|
||
dom.controlsRight.forEach( el => el.removeEventListener( eventName, onNavigateRightClicked, false ) );
|
||
dom.controlsUp.forEach( el => el.removeEventListener( eventName, onNavigateUpClicked, false ) );
|
||
dom.controlsDown.forEach( el => el.removeEventListener( eventName, onNavigateDownClicked, false ) );
|
||
dom.controlsPrev.forEach( el => el.removeEventListener( eventName, onNavigatePrevClicked, false ) );
|
||
dom.controlsNext.forEach( el => el.removeEventListener( eventName, onNavigateNextClicked, false ) );
|
||
} );
|
||
|
||
}
|
||
|
||
/**
|
||
* Applies CSS transforms to the slides container. The container
|
||
* is transformed from two separate sources: layout and the overview
|
||
* mode.
|
||
*
|
||
* @param {object} transforms
|
||
*/
|
||
function transformSlides( transforms ) {
|
||
|
||
// Pick up new transforms from arguments
|
||
if( typeof transforms.layout === 'string' ) slidesTransform.layout = transforms.layout;
|
||
if( typeof transforms.overview === 'string' ) slidesTransform.overview = transforms.overview;
|
||
|
||
// Apply the transforms to the slides container
|
||
if( slidesTransform.layout ) {
|
||
transformElement( dom.slides, slidesTransform.layout + ' ' + slidesTransform.overview );
|
||
}
|
||
else {
|
||
transformElement( dom.slides, slidesTransform.overview );
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Returns the remaining height within the parent of the
|
||
* target element.
|
||
*
|
||
* remaining height = [ configured parent height ] - [ current parent height ]
|
||
*
|
||
* @param {HTMLElement} element
|
||
* @param {number} [height]
|
||
*/
|
||
function getRemainingHeight( element, height = 0 ) {
|
||
|
||
if( element ) {
|
||
let newHeight, oldHeight = element.style.height;
|
||
|
||
// Change the .stretch element height to 0 in order find the height of all
|
||
// the other elements
|
||
element.style.height = '0px';
|
||
|
||
// In Overview mode, the parent (.slide) height is set of 700px.
|
||
// Restore it temporarily to its natural height.
|
||
element.parentNode.style.height = 'auto';
|
||
|
||
newHeight = height - element.parentNode.offsetHeight;
|
||
|
||
// Restore the old height, just in case
|
||
element.style.height = oldHeight + 'px';
|
||
|
||
// Clear the parent (.slide) height. .removeProperty works in IE9+
|
||
element.parentNode.style.removeProperty('height');
|
||
|
||
return newHeight;
|
||
}
|
||
|
||
return height;
|
||
|
||
}
|
||
|
||
/**
|
||
* Dispatches an event of the specified type from the
|
||
* reveal DOM element.
|
||
*/
|
||
function dispatchEvent({ target=dom.wrapper, type, data, bubbles=true }) {
|
||
|
||
let event = document.createEvent( 'HTMLEvents', 1, 2 );
|
||
event.initEvent( type, bubbles, true );
|
||
extend( event, data );
|
||
target.dispatchEvent( event );
|
||
|
||
if( target === dom.wrapper ) {
|
||
// If we're in an iframe, post each reveal.js event to the
|
||
// parent window. Used by the notes plugin
|
||
dispatchPostMessage( type );
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Dispatched a postMessage of the given type from our window.
|
||
*/
|
||
function dispatchPostMessage( type, data ) {
|
||
|
||
if( config.postMessageEvents && window.parent !== window.self ) {
|
||
let message = {
|
||
namespace: 'reveal',
|
||
eventName: type,
|
||
state: getState()
|
||
};
|
||
|
||
extend( message, data );
|
||
|
||
window.parent.postMessage( JSON.stringify( message ), '*' );
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Bind preview frame links.
|
||
*
|
||
* @param {string} [selector=a] - selector for anchors
|
||
*/
|
||
function enablePreviewLinks( selector = 'a' ) {
|
||
|
||
toArray( dom.wrapper.querySelectorAll( selector ) ).forEach( element => {
|
||
if( /^(http|www)/gi.test( element.getAttribute( 'href' ) ) ) {
|
||
element.addEventListener( 'click', onPreviewLinkClicked, false );
|
||
}
|
||
} );
|
||
|
||
}
|
||
|
||
/**
|
||
* Unbind preview frame links.
|
||
*/
|
||
function disablePreviewLinks( selector = 'a' ) {
|
||
|
||
toArray( dom.wrapper.querySelectorAll( selector ) ).forEach( element => {
|
||
if( /^(http|www)/gi.test( element.getAttribute( 'href' ) ) ) {
|
||
element.removeEventListener( 'click', onPreviewLinkClicked, false );
|
||
}
|
||
} );
|
||
|
||
}
|
||
|
||
/**
|
||
* Opens a preview window for the target URL.
|
||
*
|
||
* @param {string} url - url for preview iframe src
|
||
*/
|
||
function showPreview( url ) {
|
||
|
||
closeOverlay();
|
||
|
||
dom.overlay = document.createElement( 'div' );
|
||
dom.overlay.classList.add( 'overlay' );
|
||
dom.overlay.classList.add( 'overlay-preview' );
|
||
dom.wrapper.appendChild( dom.overlay );
|
||
|
||
dom.overlay.innerHTML =
|
||
`<header>
|
||
<a class="close" href="#"><span class="icon"></span></a>
|
||
<a class="external" href="${url}" target="_blank"><span class="icon"></span></a>
|
||
</header>
|
||
<div class="spinner"></div>
|
||
<div class="viewport">
|
||
<iframe src="${url}"></iframe>
|
||
<small class="viewport-inner">
|
||
<span class="x-frame-error">Unable to load iframe. This is likely due to the site's policy (x-frame-options).</span>
|
||
</small>
|
||
</div>`;
|
||
|
||
dom.overlay.querySelector( 'iframe' ).addEventListener( 'load', event => {
|
||
dom.overlay.classList.add( 'loaded' );
|
||
}, false );
|
||
|
||
dom.overlay.querySelector( '.close' ).addEventListener( 'click', event => {
|
||
closeOverlay();
|
||
event.preventDefault();
|
||
}, false );
|
||
|
||
dom.overlay.querySelector( '.external' ).addEventListener( 'click', event => {
|
||
closeOverlay();
|
||
}, false );
|
||
|
||
}
|
||
|
||
/**
|
||
* Open or close help overlay window.
|
||
*
|
||
* @param {Boolean} [override] Flag which overrides the
|
||
* toggle logic and forcibly sets the desired state. True means
|
||
* help is open, false means it's closed.
|
||
*/
|
||
function toggleHelp( override ){
|
||
|
||
if( typeof override === 'boolean' ) {
|
||
override ? showHelp() : closeOverlay();
|
||
}
|
||
else {
|
||
if( dom.overlay ) {
|
||
closeOverlay();
|
||
}
|
||
else {
|
||
showHelp();
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Opens an overlay window with help material.
|
||
*/
|
||
function showHelp() {
|
||
|
||
if( config.help ) {
|
||
|
||
closeOverlay();
|
||
|
||
dom.overlay = document.createElement( 'div' );
|
||
dom.overlay.classList.add( 'overlay' );
|
||
dom.overlay.classList.add( 'overlay-help' );
|
||
dom.wrapper.appendChild( dom.overlay );
|
||
|
||
let html = '<p class="title">Keyboard Shortcuts</p><br/>';
|
||
|
||
html += '<table><th>KEY</th><th>ACTION</th>';
|
||
for( let key in keyboard.shortcuts ) {
|
||
html += `<tr><td>${key}</td><td>${keyboard.shortcuts[ key ]}</td></tr>`;
|
||
}
|
||
|
||
// Add custom key bindings that have associated descriptions
|
||
for( let binding in keyboard.registeredKeyBindings ) {
|
||
if( keyboard.registeredKeyBindings[binding].key && keyboard.registeredKeyBindings[binding].description ) {
|
||
html += `<tr><td>${keyboard.registeredKeyBindings[binding].key}</td><td>${keyboard.registeredKeyBindings[binding].description}</td></tr>`;
|
||
}
|
||
}
|
||
|
||
html += '</table>';
|
||
|
||
dom.overlay.innerHTML = `
|
||
<header>
|
||
<a class="close" href="#"><span class="icon"></span></a>
|
||
</header>
|
||
<div class="viewport">
|
||
<div class="viewport-inner">${html}</div>
|
||
</div>
|
||
`;
|
||
|
||
dom.overlay.querySelector( '.close' ).addEventListener( 'click', event => {
|
||
closeOverlay();
|
||
event.preventDefault();
|
||
}, false );
|
||
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Closes any currently open overlay.
|
||
*/
|
||
function closeOverlay() {
|
||
|
||
if( dom.overlay ) {
|
||
dom.overlay.parentNode.removeChild( dom.overlay );
|
||
dom.overlay = null;
|
||
return true;
|
||
}
|
||
|
||
return false;
|
||
|
||
}
|
||
|
||
/**
|
||
* Applies JavaScript-controlled layout rules to the
|
||
* presentation.
|
||
*/
|
||
function layout() {
|
||
|
||
if( dom.wrapper && !print.isPrintingPDF() ) {
|
||
|
||
if( !config.disableLayout ) {
|
||
|
||
// On some mobile devices '100vh' is taller than the visible
|
||
// viewport which leads to part of the presentation being
|
||
// cut off. To work around this we define our own '--vh' custom
|
||
// property where 100x adds up to the correct height.
|
||
//
|
||
// https://css-tricks.com/the-trick-to-viewport-units-on-mobile/
|
||
if( isMobile ) {
|
||
document.documentElement.style.setProperty( '--vh', ( window.innerHeight * 0.01 ) + 'px' );
|
||
}
|
||
|
||
const size = getComputedSlideSize();
|
||
|
||
const oldScale = scale;
|
||
|
||
// Layout the contents of the slides
|
||
layoutSlideContents( config.width, config.height );
|
||
|
||
dom.slides.style.width = size.width + 'px';
|
||
dom.slides.style.height = size.height + 'px';
|
||
|
||
// Determine scale of content to fit within available space
|
||
scale = Math.min( size.presentationWidth / size.width, size.presentationHeight / size.height );
|
||
|
||
// Respect max/min scale settings
|
||
scale = Math.max( scale, config.minScale );
|
||
scale = Math.min( scale, config.maxScale );
|
||
|
||
// Don't apply any scaling styles if scale is 1
|
||
if( scale === 1 ) {
|
||
dom.slides.style.zoom = '';
|
||
dom.slides.style.left = '';
|
||
dom.slides.style.top = '';
|
||
dom.slides.style.bottom = '';
|
||
dom.slides.style.right = '';
|
||
transformSlides( { layout: '' } );
|
||
}
|
||
else {
|
||
// Zoom Scaling
|
||
// Content remains crisp no matter how much we scale. Side
|
||
// effects are minor differences in text layout and iframe
|
||
// viewports changing size. A 200x200 iframe viewport in a
|
||
// 2x zoomed presentation ends up having a 400x400 viewport.
|
||
if( scale > 1 && supportsZoom && window.devicePixelRatio < 2 ) {
|
||
dom.slides.style.zoom = scale;
|
||
dom.slides.style.left = '';
|
||
dom.slides.style.top = '';
|
||
dom.slides.style.bottom = '';
|
||
dom.slides.style.right = '';
|
||
transformSlides( { layout: '' } );
|
||
}
|
||
// Transform Scaling
|
||
// Content layout remains the exact same when scaled up.
|
||
// Side effect is content becoming blurred, especially with
|
||
// high scale values on ldpi screens.
|
||
else {
|
||
dom.slides.style.zoom = '';
|
||
dom.slides.style.left = '50%';
|
||
dom.slides.style.top = '50%';
|
||
dom.slides.style.bottom = 'auto';
|
||
dom.slides.style.right = 'auto';
|
||
transformSlides( { layout: 'translate(-50%, -50%) scale('+ scale +')' } );
|
||
}
|
||
}
|
||
|
||
// Select all slides, vertical and horizontal
|
||
const slides = toArray( dom.wrapper.querySelectorAll( SLIDES_SELECTOR ) );
|
||
|
||
for( let i = 0, len = slides.length; i < len; i++ ) {
|
||
const slide = slides[ i ];
|
||
|
||
// Don't bother updating invisible slides
|
||
if( slide.style.display === 'none' ) {
|
||
continue;
|
||
}
|
||
|
||
if( config.center || slide.classList.contains( 'center' ) ) {
|
||
// Vertical stacks are not centred since their section
|
||
// children will be
|
||
if( slide.classList.contains( 'stack' ) ) {
|
||
slide.style.top = 0;
|
||
}
|
||
else {
|
||
slide.style.top = Math.max( ( size.height - slide.scrollHeight ) / 2, 0 ) + 'px';
|
||
}
|
||
}
|
||
else {
|
||
slide.style.top = '';
|
||
}
|
||
|
||
}
|
||
|
||
if( oldScale !== scale ) {
|
||
dispatchEvent({
|
||
type: 'resize',
|
||
data: {
|
||
oldScale,
|
||
scale,
|
||
size
|
||
}
|
||
});
|
||
}
|
||
}
|
||
|
||
updateProgress();
|
||
backgrounds.updateParallax();
|
||
|
||
if( overview.isActive() ) {
|
||
overview.update();
|
||
}
|
||
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Applies layout logic to the contents of all slides in
|
||
* the presentation.
|
||
*
|
||
* @param {string|number} width
|
||
* @param {string|number} height
|
||
*/
|
||
function layoutSlideContents( width, height ) {
|
||
|
||
// Handle sizing of elements with the 'stretch' class
|
||
toArray( dom.slides.querySelectorAll( 'section > .stretch' ) ).forEach( element => {
|
||
|
||
// Determine how much vertical space we can use
|
||
let remainingHeight = getRemainingHeight( element, height );
|
||
|
||
// Consider the aspect ratio of media elements
|
||
if( /(img|video)/gi.test( element.nodeName ) ) {
|
||
const nw = element.naturalWidth || element.videoWidth,
|
||
nh = element.naturalHeight || element.videoHeight;
|
||
|
||
const es = Math.min( width / nw, remainingHeight / nh );
|
||
|
||
element.style.width = ( nw * es ) + 'px';
|
||
element.style.height = ( nh * es ) + 'px';
|
||
|
||
}
|
||
else {
|
||
element.style.width = width + 'px';
|
||
element.style.height = remainingHeight + 'px';
|
||
}
|
||
|
||
} );
|
||
|
||
}
|
||
|
||
/**
|
||
* Calculates the computed pixel size of our slides. These
|
||
* values are based on the width and height configuration
|
||
* options.
|
||
*
|
||
* @param {number} [presentationWidth=dom.wrapper.offsetWidth]
|
||
* @param {number} [presentationHeight=dom.wrapper.offsetHeight]
|
||
*/
|
||
function getComputedSlideSize( presentationWidth, presentationHeight ) {
|
||
|
||
const size = {
|
||
// Slide size
|
||
width: config.width,
|
||
height: config.height,
|
||
|
||
// Presentation size
|
||
presentationWidth: presentationWidth || dom.wrapper.offsetWidth,
|
||
presentationHeight: presentationHeight || dom.wrapper.offsetHeight
|
||
};
|
||
|
||
// Reduce available space by margin
|
||
size.presentationWidth -= ( size.presentationWidth * config.margin );
|
||
size.presentationHeight -= ( size.presentationHeight * config.margin );
|
||
|
||
// Slide width may be a percentage of available width
|
||
if( typeof size.width === 'string' && /%$/.test( size.width ) ) {
|
||
size.width = parseInt( size.width, 10 ) / 100 * size.presentationWidth;
|
||
}
|
||
|
||
// Slide height may be a percentage of available height
|
||
if( typeof size.height === 'string' && /%$/.test( size.height ) ) {
|
||
size.height = parseInt( size.height, 10 ) / 100 * size.presentationHeight;
|
||
}
|
||
|
||
return size;
|
||
|
||
}
|
||
|
||
/**
|
||
* Stores the vertical index of a stack so that the same
|
||
* vertical slide can be selected when navigating to and
|
||
* from the stack.
|
||
*
|
||
* @param {HTMLElement} stack The vertical stack element
|
||
* @param {string|number} [v=0] Index to memorize
|
||
*/
|
||
function setPreviousVerticalIndex( stack, v ) {
|
||
|
||
if( typeof stack === 'object' && typeof stack.setAttribute === 'function' ) {
|
||
stack.setAttribute( 'data-previous-indexv', v || 0 );
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Retrieves the vertical index which was stored using
|
||
* #setPreviousVerticalIndex() or 0 if no previous index
|
||
* exists.
|
||
*
|
||
* @param {HTMLElement} stack The vertical stack element
|
||
*/
|
||
function getPreviousVerticalIndex( stack ) {
|
||
|
||
if( typeof stack === 'object' && typeof stack.setAttribute === 'function' && stack.classList.contains( 'stack' ) ) {
|
||
// Prefer manually defined start-indexv
|
||
const attributeName = stack.hasAttribute( 'data-start-indexv' ) ? 'data-start-indexv' : 'data-previous-indexv';
|
||
|
||
return parseInt( stack.getAttribute( attributeName ) || 0, 10 );
|
||
}
|
||
|
||
return 0;
|
||
|
||
}
|
||
|
||
/**
|
||
* Checks if the current or specified slide is vertical
|
||
* (nested within another slide).
|
||
*
|
||
* @param {HTMLElement} [slide=currentSlide] The slide to check
|
||
* orientation of
|
||
* @return {Boolean}
|
||
*/
|
||
function isVerticalSlide( slide = currentSlide ) {
|
||
|
||
return slide && slide.parentNode && !!slide.parentNode.nodeName.match( /section/i );
|
||
|
||
}
|
||
|
||
/**
|
||
* Returns true if we're on the last slide in the current
|
||
* vertical stack.
|
||
*/
|
||
function isLastVerticalSlide() {
|
||
|
||
if( currentSlide && isVerticalSlide( currentSlide ) ) {
|
||
// Does this slide have a next sibling?
|
||
if( currentSlide.nextElementSibling ) return false;
|
||
|
||
return true;
|
||
}
|
||
|
||
return false;
|
||
|
||
}
|
||
|
||
/**
|
||
* Returns true if we're currently on the first slide in
|
||
* the presentation.
|
||
*/
|
||
function isFirstSlide() {
|
||
|
||
return indexh === 0 && indexv === 0;
|
||
|
||
}
|
||
|
||
/**
|
||
* Returns true if we're currently on the last slide in
|
||
* the presenation. If the last slide is a stack, we only
|
||
* consider this the last slide if it's at the end of the
|
||
* stack.
|
||
*/
|
||
function isLastSlide() {
|
||
|
||
if( currentSlide ) {
|
||
// Does this slide have a next sibling?
|
||
if( currentSlide.nextElementSibling ) return false;
|
||
|
||
// If it's vertical, does its parent have a next sibling?
|
||
if( isVerticalSlide( currentSlide ) && currentSlide.parentNode.nextElementSibling ) return false;
|
||
|
||
return true;
|
||
}
|
||
|
||
return false;
|
||
|
||
}
|
||
|
||
/**
|
||
* Shows the mouse pointer after it has been hidden with
|
||
* #hideCursor.
|
||
*/
|
||
function showCursor() {
|
||
|
||
if( cursorHidden ) {
|
||
cursorHidden = false;
|
||
dom.wrapper.style.cursor = '';
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Hides the mouse pointer when it's on top of the .reveal
|
||
* container.
|
||
*/
|
||
function hideCursor() {
|
||
|
||
if( cursorHidden === false ) {
|
||
cursorHidden = true;
|
||
dom.wrapper.style.cursor = 'none';
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Enters the paused mode which fades everything on screen to
|
||
* black.
|
||
*/
|
||
function pause() {
|
||
|
||
if( config.pause ) {
|
||
const wasPaused = dom.wrapper.classList.contains( 'paused' );
|
||
|
||
cancelAutoSlide();
|
||
dom.wrapper.classList.add( 'paused' );
|
||
|
||
if( wasPaused === false ) {
|
||
dispatchEvent({ type: 'paused' });
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Exits from the paused mode.
|
||
*/
|
||
function resume() {
|
||
|
||
const wasPaused = dom.wrapper.classList.contains( 'paused' );
|
||
dom.wrapper.classList.remove( 'paused' );
|
||
|
||
cueAutoSlide();
|
||
|
||
if( wasPaused ) {
|
||
dispatchEvent({ type: 'resumed' });
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Toggles the paused mode on and off.
|
||
*/
|
||
function togglePause( override ) {
|
||
|
||
if( typeof override === 'boolean' ) {
|
||
override ? pause() : resume();
|
||
}
|
||
else {
|
||
isPaused() ? resume() : pause();
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Checks if we are currently in the paused mode.
|
||
*
|
||
* @return {Boolean}
|
||
*/
|
||
function isPaused() {
|
||
|
||
return dom.wrapper.classList.contains( 'paused' );
|
||
|
||
}
|
||
|
||
/**
|
||
* Toggles the auto slide mode on and off.
|
||
*
|
||
* @param {Boolean} [override] Flag which sets the desired state.
|
||
* True means autoplay starts, false means it stops.
|
||
*/
|
||
|
||
function toggleAutoSlide( override ) {
|
||
|
||
if( typeof override === 'boolean' ) {
|
||
override ? resumeAutoSlide() : pauseAutoSlide();
|
||
}
|
||
|
||
else {
|
||
autoSlidePaused ? resumeAutoSlide() : pauseAutoSlide();
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Checks if the auto slide mode is currently on.
|
||
*
|
||
* @return {Boolean}
|
||
*/
|
||
function isAutoSliding() {
|
||
|
||
return !!( autoSlide && !autoSlidePaused );
|
||
|
||
}
|
||
|
||
/**
|
||
* Steps from the current point in the presentation to the
|
||
* slide which matches the specified horizontal and vertical
|
||
* indices.
|
||
*
|
||
* @param {number} [h=indexh] Horizontal index of the target slide
|
||
* @param {number} [v=indexv] Vertical index of the target slide
|
||
* @param {number} [f] Index of a fragment within the
|
||
* target slide to activate
|
||
* @param {number} [o] Origin for use in multimaster environments
|
||
*/
|
||
function slide( h, v, f, o ) {
|
||
|
||
// Remember where we were at before
|
||
previousSlide = currentSlide;
|
||
|
||
// Query all horizontal slides in the deck
|
||
const horizontalSlides = dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR );
|
||
|
||
// Abort if there are no slides
|
||
if( horizontalSlides.length === 0 ) return;
|
||
|
||
// If no vertical index is specified and the upcoming slide is a
|
||
// stack, resume at its previous vertical index
|
||
if( v === undefined && !overview.isActive() ) {
|
||
v = getPreviousVerticalIndex( horizontalSlides[ h ] );
|
||
}
|
||
|
||
// If we were on a vertical stack, remember what vertical index
|
||
// it was on so we can resume at the same position when returning
|
||
if( previousSlide && previousSlide.parentNode && previousSlide.parentNode.classList.contains( 'stack' ) ) {
|
||
setPreviousVerticalIndex( previousSlide.parentNode, indexv );
|
||
}
|
||
|
||
// Remember the state before this slide
|
||
const stateBefore = state.concat();
|
||
|
||
// Reset the state array
|
||
state.length = 0;
|
||
|
||
let indexhBefore = indexh || 0,
|
||
indexvBefore = indexv || 0;
|
||
|
||
// Activate and transition to the new slide
|
||
indexh = updateSlides( HORIZONTAL_SLIDES_SELECTOR, h === undefined ? indexh : h );
|
||
indexv = updateSlides( VERTICAL_SLIDES_SELECTOR, v === undefined ? indexv : v );
|
||
|
||
// Update the visibility of slides now that the indices have changed
|
||
updateSlidesVisibility();
|
||
|
||
layout();
|
||
|
||
// Update the overview if it's currently active
|
||
if( overview.isActive() ) {
|
||
overview.update();
|
||
}
|
||
|
||
// Find the current horizontal slide and any possible vertical slides
|
||
// within it
|
||
let currentHorizontalSlide = horizontalSlides[ indexh ],
|
||
currentVerticalSlides = currentHorizontalSlide.querySelectorAll( 'section' );
|
||
|
||
// Store references to the previous and current slides
|
||
currentSlide = currentVerticalSlides[ indexv ] || currentHorizontalSlide;
|
||
|
||
// Show fragment, if specified
|
||
if( typeof f !== 'undefined' ) {
|
||
fragments.goto( f );
|
||
}
|
||
|
||
// Dispatch an event if the slide changed
|
||
let slideChanged = ( indexh !== indexhBefore || indexv !== indexvBefore );
|
||
if (!slideChanged) {
|
||
// Ensure that the previous slide is never the same as the current
|
||
previousSlide = null;
|
||
}
|
||
|
||
// Solves an edge case where the previous slide maintains the
|
||
// 'present' class when navigating between adjacent vertical
|
||
// stacks
|
||
if( previousSlide && previousSlide !== currentSlide ) {
|
||
previousSlide.classList.remove( 'present' );
|
||
previousSlide.setAttribute( 'aria-hidden', 'true' );
|
||
|
||
// Reset all slides upon navigate to home
|
||
if( isFirstSlide() ) {
|
||
// Launch async task
|
||
setTimeout( () => {
|
||
getVerticalStacks().forEach( slide => {
|
||
setPreviousVerticalIndex( slide, 0 );
|
||
} );
|
||
}, 0 );
|
||
}
|
||
}
|
||
|
||
// Apply the new state
|
||
stateLoop: for( let 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( let 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({ type: state[i] });
|
||
}
|
||
|
||
// Clean up the remains of the previous state
|
||
while( stateBefore.length ) {
|
||
document.documentElement.classList.remove( stateBefore.pop() );
|
||
}
|
||
|
||
if( slideChanged ) {
|
||
dispatchEvent({
|
||
type: 'slidechanged',
|
||
data: {
|
||
indexh,
|
||
indexv,
|
||
previousSlide,
|
||
currentSlide,
|
||
origin: o
|
||
}
|
||
});
|
||
}
|
||
|
||
// Handle embedded content
|
||
if( slideChanged || !previousSlide ) {
|
||
slideContent.stopEmbeddedContent( previousSlide );
|
||
slideContent.startEmbeddedContent( currentSlide );
|
||
}
|
||
|
||
// Announce the current slide contents to screen readers
|
||
announceStatus( getStatusText( currentSlide ) );
|
||
|
||
updateControls();
|
||
updateProgress();
|
||
|
||
notes.update();
|
||
backgrounds.update();
|
||
backgrounds.updateParallax();
|
||
slideNumber.update();
|
||
fragments.update();
|
||
|
||
// Update the URL hash
|
||
location.writeURL();
|
||
|
||
cueAutoSlide();
|
||
|
||
// Auto-animation
|
||
if( slideChanged && previousSlide && currentSlide && !overview.isActive() ) {
|
||
|
||
// Skip the slide transition between our two slides
|
||
// when auto-animating individual elements
|
||
if( previousSlide.hasAttribute( 'data-auto-animate' ) && currentSlide.hasAttribute( 'data-auto-animate' ) ) {
|
||
dom.slides.classList.add( 'disable-slide-transitions' );
|
||
|
||
setTimeout( () => {
|
||
dom.slides.classList.remove( 'disable-slide-transitions' );
|
||
}, 0 );
|
||
|
||
if( config.autoAnimate ) {
|
||
// Run the auto-animation between our slides
|
||
autoAnimate.run( previousSlide, currentSlide );
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Syncs the presentation with the current DOM. Useful
|
||
* when new slides or control elements are added or when
|
||
* the configuration has changed.
|
||
*/
|
||
function sync() {
|
||
|
||
// Subscribe to input
|
||
removeEventListeners();
|
||
addEventListeners();
|
||
|
||
// Force a layout to make sure the current config is accounted for
|
||
layout();
|
||
|
||
// Reflect the current autoSlide value
|
||
autoSlide = config.autoSlide;
|
||
|
||
// Start auto-sliding if it's enabled
|
||
cueAutoSlide();
|
||
|
||
// Re-create all slide backgrounds
|
||
backgrounds.create();
|
||
|
||
// Write the current hash to the URL
|
||
location.writeURL();
|
||
|
||
fragments.sortAll();
|
||
|
||
updateControls();
|
||
updateProgress();
|
||
updateSlidesVisibility();
|
||
|
||
notes.update();
|
||
notes.updateVisibility();
|
||
backgrounds.update( true );
|
||
slideNumber.update();
|
||
slideContent.formatEmbeddedContent();
|
||
|
||
// Start or stop embedded content depending on global config
|
||
if( config.autoPlayMedia === false ) {
|
||
slideContent.stopEmbeddedContent( currentSlide, { unloadIframes: false } );
|
||
}
|
||
else {
|
||
slideContent.startEmbeddedContent( currentSlide );
|
||
}
|
||
|
||
if( overview.isActive() ) {
|
||
overview.layout();
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Updates reveal.js to keep in sync with new slide attributes. For
|
||
* example, if you add a new `data-background-image` you can call
|
||
* this to have reveal.js render the new background image.
|
||
*
|
||
* Similar to #sync() but more efficient when you only need to
|
||
* refresh a specific slide.
|
||
*
|
||
* @param {HTMLElement} slide
|
||
*/
|
||
function syncSlide( slide = currentSlide ) {
|
||
|
||
backgrounds.sync( slide );
|
||
fragments.sync( slide );
|
||
|
||
slideContent.load( slide );
|
||
|
||
backgrounds.update();
|
||
notes.update();
|
||
|
||
}
|
||
|
||
/**
|
||
* Resets all vertical slides so that only the first
|
||
* is visible.
|
||
*/
|
||
function resetVerticalSlides() {
|
||
|
||
getHorizontalSlides().forEach( horizontalSlide => {
|
||
|
||
toArray( horizontalSlide.querySelectorAll( 'section' ) ).forEach( ( verticalSlide, y ) => {
|
||
|
||
if( y > 0 ) {
|
||
verticalSlide.classList.remove( 'present' );
|
||
verticalSlide.classList.remove( 'past' );
|
||
verticalSlide.classList.add( 'future' );
|
||
verticalSlide.setAttribute( 'aria-hidden', 'true' );
|
||
}
|
||
|
||
} );
|
||
|
||
} );
|
||
|
||
}
|
||
|
||
/**
|
||
* Randomly shuffles all slides in the deck.
|
||
*/
|
||
function shuffle() {
|
||
|
||
getHorizontalSlides().forEach( ( slide, i, slides ) => {
|
||
|
||
// Insert this slide next to another random slide. This may
|
||
// cause the slide to insert before itself but that's fine.
|
||
dom.slides.insertBefore( slide, slides[ Math.floor( Math.random() * slides.length ) ] );
|
||
|
||
} );
|
||
|
||
}
|
||
|
||
/**
|
||
* Updates one dimension of slides by showing the slide
|
||
* with the specified index.
|
||
*
|
||
* @param {string} selector A CSS selector that will fetch
|
||
* the group of slides we are working with
|
||
* @param {number} index The index of the slide that should be
|
||
* shown
|
||
*
|
||
* @return {number} The index of the slide that is now shown,
|
||
* might differ from the passed in index if it was out of
|
||
* bounds.
|
||
*/
|
||
function updateSlides( selector, index ) {
|
||
|
||
// Select all slides and convert the NodeList result to
|
||
// an array
|
||
let slides = toArray( dom.wrapper.querySelectorAll( selector ) ),
|
||
slidesLength = slides.length;
|
||
|
||
let printMode = print.isPrintingPDF();
|
||
|
||
if( slidesLength ) {
|
||
|
||
// Should the index loop?
|
||
if( config.loop ) {
|
||
index %= slidesLength;
|
||
|
||
if( index < 0 ) {
|
||
index = slidesLength + index;
|
||
}
|
||
}
|
||
|
||
// Enforce max and minimum index bounds
|
||
index = Math.max( Math.min( index, slidesLength - 1 ), 0 );
|
||
|
||
for( let i = 0; i < slidesLength; i++ ) {
|
||
let element = slides[i];
|
||
|
||
let reverse = config.rtl && !isVerticalSlide( element );
|
||
|
||
element.classList.remove( 'past', 'present', 'future' );
|
||
|
||
// http://www.w3.org/html/wg/drafts/html/master/editing.html#the-hidden-attribute
|
||
element.setAttribute( 'hidden', '' );
|
||
element.setAttribute( 'aria-hidden', 'true' );
|
||
|
||
// If this element contains vertical slides
|
||
if( element.querySelector( 'section' ) ) {
|
||
element.classList.add( 'stack' );
|
||
}
|
||
|
||
// If we're printing static slides, all slides are "present"
|
||
if( printMode ) {
|
||
element.classList.add( 'present' );
|
||
continue;
|
||
}
|
||
|
||
if( i < index ) {
|
||
// Any element previous to index is given the 'past' class
|
||
element.classList.add( reverse ? 'future' : 'past' );
|
||
|
||
if( config.fragments ) {
|
||
// Show all fragments in prior slides
|
||
toArray( element.querySelectorAll( '.fragment' ) ).forEach( fragment => {
|
||
fragment.classList.add( 'visible' );
|
||
fragment.classList.remove( 'current-fragment' );
|
||
} );
|
||
}
|
||
}
|
||
else if( i > index ) {
|
||
// Any element subsequent to index is given the 'future' class
|
||
element.classList.add( reverse ? 'past' : 'future' );
|
||
|
||
if( config.fragments ) {
|
||
// Hide all fragments in future slides
|
||
toArray( element.querySelectorAll( '.fragment.visible' ) ).forEach( fragment => {
|
||
fragment.classList.remove( 'visible', 'current-fragment' );
|
||
} );
|
||
}
|
||
}
|
||
}
|
||
|
||
let slide = slides[index];
|
||
let wasPresent = slide.classList.contains( 'present' );
|
||
|
||
// Mark the current slide as present
|
||
slide.classList.add( 'present' );
|
||
slide.removeAttribute( 'hidden' );
|
||
slide.removeAttribute( 'aria-hidden' );
|
||
|
||
if( !wasPresent ) {
|
||
// Dispatch an event indicating the slide is now visible
|
||
dispatchEvent({
|
||
target: slide,
|
||
type: 'visible',
|
||
bubbles: false
|
||
});
|
||
}
|
||
|
||
// If this slide has a state associated with it, add it
|
||
// onto the current state of the deck
|
||
let slideState = slide.getAttribute( 'data-state' );
|
||
if( slideState ) {
|
||
state = state.concat( slideState.split( ' ' ) );
|
||
}
|
||
|
||
}
|
||
else {
|
||
// Since there are no slides we can't be anywhere beyond the
|
||
// zeroth index
|
||
index = 0;
|
||
}
|
||
|
||
return index;
|
||
|
||
}
|
||
|
||
/**
|
||
* Optimization method; hide all slides that are far away
|
||
* from the present slide.
|
||
*/
|
||
function updateSlidesVisibility() {
|
||
|
||
// Select all slides and convert the NodeList result to
|
||
// an array
|
||
let horizontalSlides = getHorizontalSlides(),
|
||
horizontalSlidesLength = horizontalSlides.length,
|
||
distanceX,
|
||
distanceY;
|
||
|
||
if( horizontalSlidesLength && typeof indexh !== 'undefined' ) {
|
||
|
||
// The number of steps away from the present slide that will
|
||
// be visible
|
||
let viewDistance = overview.isActive() ? 10 : config.viewDistance;
|
||
|
||
// Shorten the view distance on devices that typically have
|
||
// less resources
|
||
if( isMobile ) {
|
||
viewDistance = overview.isActive() ? 6 : config.mobileViewDistance;
|
||
}
|
||
|
||
// All slides need to be visible when exporting to PDF
|
||
if( print.isPrintingPDF() ) {
|
||
viewDistance = Number.MAX_VALUE;
|
||
}
|
||
|
||
for( let x = 0; x < horizontalSlidesLength; x++ ) {
|
||
let horizontalSlide = horizontalSlides[x];
|
||
|
||
let verticalSlides = toArray( horizontalSlide.querySelectorAll( 'section' ) ),
|
||
verticalSlidesLength = verticalSlides.length;
|
||
|
||
// Determine how far away this slide is from the present
|
||
distanceX = Math.abs( ( indexh || 0 ) - x ) || 0;
|
||
|
||
// If the presentation is looped, distance should measure
|
||
// 1 between the first and last slides
|
||
if( config.loop ) {
|
||
distanceX = Math.abs( ( ( indexh || 0 ) - x ) % ( horizontalSlidesLength - viewDistance ) ) || 0;
|
||
}
|
||
|
||
// Show the horizontal slide if it's within the view distance
|
||
if( distanceX < viewDistance ) {
|
||
slideContent.load( horizontalSlide );
|
||
}
|
||
else {
|
||
slideContent.unload( horizontalSlide );
|
||
}
|
||
|
||
if( verticalSlidesLength ) {
|
||
|
||
let oy = getPreviousVerticalIndex( horizontalSlide );
|
||
|
||
for( let y = 0; y < verticalSlidesLength; y++ ) {
|
||
let verticalSlide = verticalSlides[y];
|
||
|
||
distanceY = x === ( indexh || 0 ) ? Math.abs( ( indexv || 0 ) - y ) : Math.abs( y - oy );
|
||
|
||
if( distanceX + distanceY < viewDistance ) {
|
||
slideContent.load( verticalSlide );
|
||
}
|
||
else {
|
||
slideContent.unload( verticalSlide );
|
||
}
|
||
}
|
||
|
||
}
|
||
}
|
||
|
||
// Flag if there are ANY vertical slides, anywhere in the deck
|
||
if( hasVerticalSlides() ) {
|
||
dom.wrapper.classList.add( 'has-vertical-slides' );
|
||
}
|
||
else {
|
||
dom.wrapper.classList.remove( 'has-vertical-slides' );
|
||
}
|
||
|
||
// Flag if there are ANY horizontal slides, anywhere in the deck
|
||
if( hasHorizontalSlides() ) {
|
||
dom.wrapper.classList.add( 'has-horizontal-slides' );
|
||
}
|
||
else {
|
||
dom.wrapper.classList.remove( 'has-horizontal-slides' );
|
||
}
|
||
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Updates the progress bar to reflect the current slide.
|
||
*/
|
||
function updateProgress() {
|
||
|
||
// Update progress if enabled
|
||
if( config.progress && dom.progressbar ) {
|
||
|
||
dom.progressbar.style.width = getProgress() * dom.wrapper.offsetWidth + 'px';
|
||
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Updates the state of all control/navigation arrows.
|
||
*/
|
||
function updateControls() {
|
||
|
||
let routes = availableRoutes();
|
||
let fragmentsRoutes = fragments.availableRoutes();
|
||
|
||
// Remove the 'enabled' class from all directions
|
||
[...dom.controlsLeft, ...dom.controlsRight, ...dom.controlsUp, ...dom.controlsDown, ...dom.controlsPrev, ...dom.controlsNext].forEach( node => {
|
||
node.classList.remove( 'enabled', 'fragmented' );
|
||
|
||
// Set 'disabled' attribute on all directions
|
||
node.setAttribute( 'disabled', 'disabled' );
|
||
} );
|
||
|
||
// Add the 'enabled' class to the available routes; remove 'disabled' attribute to enable buttons
|
||
if( routes.left ) dom.controlsLeft.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
||
if( routes.right ) dom.controlsRight.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
||
if( routes.up ) dom.controlsUp.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
||
if( routes.down ) dom.controlsDown.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
||
|
||
// Prev/next buttons
|
||
if( routes.left || routes.up ) dom.controlsPrev.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
||
if( routes.right || routes.down ) dom.controlsNext.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
||
|
||
// Highlight fragment directions
|
||
if( currentSlide ) {
|
||
|
||
// Always apply fragment decorator to prev/next buttons
|
||
if( fragmentsRoutes.prev ) dom.controlsPrev.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
||
if( fragmentsRoutes.next ) dom.controlsNext.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
||
|
||
// Apply fragment decorators to directional buttons based on
|
||
// what slide axis they are in
|
||
if( isVerticalSlide( currentSlide ) ) {
|
||
if( fragmentsRoutes.prev ) dom.controlsUp.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
||
if( fragmentsRoutes.next ) dom.controlsDown.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
||
}
|
||
else {
|
||
if( fragmentsRoutes.prev ) dom.controlsLeft.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
||
if( fragmentsRoutes.next ) dom.controlsRight.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
||
}
|
||
|
||
}
|
||
|
||
if( config.controlsTutorial ) {
|
||
|
||
// Highlight control arrows with an animation to ensure
|
||
// that the viewer knows how to navigate
|
||
if( !hasNavigatedVertically && routes.down ) {
|
||
dom.controlsDownArrow.classList.add( 'highlight' );
|
||
}
|
||
else {
|
||
dom.controlsDownArrow.classList.remove( 'highlight' );
|
||
|
||
if( config.rtl ) {
|
||
|
||
if( !hasNavigatedHorizontally && routes.left && indexv === 0 ) {
|
||
dom.controlsLeftArrow.classList.add( 'highlight' );
|
||
}
|
||
else {
|
||
dom.controlsLeftArrow.classList.remove( 'highlight' );
|
||
}
|
||
|
||
} else {
|
||
|
||
if( !hasNavigatedHorizontally && routes.right && indexv === 0 ) {
|
||
dom.controlsRightArrow.classList.add( 'highlight' );
|
||
}
|
||
else {
|
||
dom.controlsRightArrow.classList.remove( 'highlight' );
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Determine what available routes there are for navigation.
|
||
*
|
||
* @return {{left: boolean, right: boolean, up: boolean, down: boolean}}
|
||
*/
|
||
function availableRoutes() {
|
||
|
||
let horizontalSlides = dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ),
|
||
verticalSlides = dom.wrapper.querySelectorAll( VERTICAL_SLIDES_SELECTOR );
|
||
|
||
let routes = {
|
||
left: indexh > 0,
|
||
right: indexh < horizontalSlides.length - 1,
|
||
up: indexv > 0,
|
||
down: indexv < verticalSlides.length - 1
|
||
};
|
||
|
||
// Looped presentations can always be navigated as long as
|
||
// there are slides available
|
||
if( config.loop ) {
|
||
if( horizontalSlides.length > 1 ) {
|
||
routes.left = true;
|
||
routes.right = true;
|
||
}
|
||
|
||
if( verticalSlides.length > 1 ) {
|
||
routes.up = true;
|
||
routes.down = true;
|
||
}
|
||
}
|
||
|
||
if ( horizontalSlides.length > 1 && config.navigationMode === 'linear' ) {
|
||
routes.right = routes.right || routes.down;
|
||
routes.left = routes.left || routes.up;
|
||
}
|
||
|
||
// Reverse horizontal controls for rtl
|
||
if( config.rtl ) {
|
||
let left = routes.left;
|
||
routes.left = routes.right;
|
||
routes.right = left;
|
||
}
|
||
|
||
return routes;
|
||
|
||
}
|
||
|
||
/**
|
||
* Returns the number of past slides. This can be used as a global
|
||
* flattened index for slides.
|
||
*
|
||
* @param {HTMLElement} [slide=currentSlide] The slide we're counting before
|
||
*
|
||
* @return {number} Past slide count
|
||
*/
|
||
function getSlidePastCount( slide = currentSlide ) {
|
||
|
||
let horizontalSlides = getHorizontalSlides();
|
||
|
||
// The number of past slides
|
||
let pastCount = 0;
|
||
|
||
// Step through all slides and count the past ones
|
||
mainLoop: for( let i = 0; i < horizontalSlides.length; i++ ) {
|
||
|
||
let horizontalSlide = horizontalSlides[i];
|
||
let verticalSlides = horizontalSlide.querySelectorAll( 'section' );
|
||
|
||
for( let j = 0; j < verticalSlides.length; j++ ) {
|
||
|
||
// Stop as soon as we arrive at the present
|
||
if( verticalSlides[j] === slide ) {
|
||
break mainLoop;
|
||
}
|
||
|
||
// Don't count slides with the "uncounted" class
|
||
if( verticalSlides[j].dataset.visibility !== 'uncounted' ) {
|
||
pastCount++;
|
||
}
|
||
|
||
}
|
||
|
||
// Stop as soon as we arrive at the present
|
||
if( horizontalSlide === slide ) {
|
||
break;
|
||
}
|
||
|
||
// Don't count the wrapping section for vertical slides and
|
||
// slides marked as uncounted
|
||
if( horizontalSlide.classList.contains( 'stack' ) === false && !horizontalSlide.dataset.visibility !== 'uncounted' ) {
|
||
pastCount++;
|
||
}
|
||
|
||
}
|
||
|
||
return pastCount;
|
||
|
||
}
|
||
|
||
/**
|
||
* Returns a value ranging from 0-1 that represents
|
||
* how far into the presentation we have navigated.
|
||
*
|
||
* @return {number}
|
||
*/
|
||
function getProgress() {
|
||
|
||
// The number of past and total slides
|
||
let totalCount = getTotalSlides();
|
||
let pastCount = getSlidePastCount();
|
||
|
||
if( currentSlide ) {
|
||
|
||
let allFragments = currentSlide.querySelectorAll( '.fragment' );
|
||
|
||
// If there are fragments in the current slide those should be
|
||
// accounted for in the progress.
|
||
if( allFragments.length > 0 ) {
|
||
let visibleFragments = currentSlide.querySelectorAll( '.fragment.visible' );
|
||
|
||
// This value represents how big a portion of the slide progress
|
||
// that is made up by its fragments (0-1)
|
||
let fragmentWeight = 0.9;
|
||
|
||
// Add fragment progress to the past slide count
|
||
pastCount += ( visibleFragments.length / allFragments.length ) * fragmentWeight;
|
||
}
|
||
|
||
}
|
||
|
||
return Math.min( pastCount / ( totalCount - 1 ), 1 );
|
||
|
||
}
|
||
|
||
/**
|
||
* Retrieves the h/v location and fragment of the current,
|
||
* or specified, slide.
|
||
*
|
||
* @param {HTMLElement} [slide] If specified, the returned
|
||
* index will be for this slide rather than the currently
|
||
* active one
|
||
*
|
||
* @return {{h: number, v: number, f: number}}
|
||
*/
|
||
function getIndices( slide ) {
|
||
|
||
// By default, return the current indices
|
||
let h = indexh,
|
||
v = indexv,
|
||
f;
|
||
|
||
// If a slide is specified, return the indices of that slide
|
||
if( slide ) {
|
||
let isVertical = isVerticalSlide( slide );
|
||
let slideh = isVertical ? slide.parentNode : slide;
|
||
|
||
// Select all horizontal slides
|
||
let horizontalSlides = getHorizontalSlides();
|
||
|
||
// Now that we know which the horizontal slide is, get its index
|
||
h = Math.max( horizontalSlides.indexOf( slideh ), 0 );
|
||
|
||
// Assume we're not vertical
|
||
v = undefined;
|
||
|
||
// If this is a vertical slide, grab the vertical index
|
||
if( isVertical ) {
|
||
v = Math.max( toArray( slide.parentNode.querySelectorAll( 'section' ) ).indexOf( slide ), 0 );
|
||
}
|
||
}
|
||
|
||
if( !slide && currentSlide ) {
|
||
let hasFragments = currentSlide.querySelectorAll( '.fragment' ).length > 0;
|
||
if( hasFragments ) {
|
||
let currentFragment = currentSlide.querySelector( '.current-fragment' );
|
||
if( currentFragment && currentFragment.hasAttribute( 'data-fragment-index' ) ) {
|
||
f = parseInt( currentFragment.getAttribute( 'data-fragment-index' ), 10 );
|
||
}
|
||
else {
|
||
f = currentSlide.querySelectorAll( '.fragment.visible' ).length - 1;
|
||
}
|
||
}
|
||
}
|
||
|
||
return { h, v, f };
|
||
|
||
}
|
||
|
||
/**
|
||
* Retrieves all slides in this presentation.
|
||
*/
|
||
function getSlides() {
|
||
|
||
return toArray( dom.wrapper.querySelectorAll( SLIDES_SELECTOR + ':not(.stack):not([data-visibility="uncounted"])' ) );
|
||
|
||
}
|
||
|
||
/**
|
||
* Returns a list of all horizontal slides in the deck. Each
|
||
* vertical stack is included as one horizontal slide in the
|
||
* resulting array.
|
||
*/
|
||
function getHorizontalSlides() {
|
||
|
||
return toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) );
|
||
|
||
}
|
||
|
||
/**
|
||
* Returns all vertical slides that exist within this deck.
|
||
*/
|
||
function getVerticalSlides() {
|
||
|
||
return toArray( dom.wrapper.querySelectorAll( '.slides>section>section' ) );
|
||
|
||
}
|
||
|
||
/**
|
||
* Returns all vertical stacks (each stack can contain multiple slides).
|
||
*/
|
||
function getVerticalStacks() {
|
||
|
||
return toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR + '.stack') );
|
||
|
||
}
|
||
|
||
/**
|
||
* Returns true if there are at least two horizontal slides.
|
||
*/
|
||
function hasHorizontalSlides() {
|
||
|
||
return getHorizontalSlides().length > 1;
|
||
}
|
||
|
||
/**
|
||
* Returns true if there are at least two vertical slides.
|
||
*/
|
||
function hasVerticalSlides() {
|
||
|
||
return getVerticalSlides().length > 1;
|
||
|
||
}
|
||
|
||
/**
|
||
* Returns an array of objects where each object represents the
|
||
* attributes on its respective slide.
|
||
*/
|
||
function getSlidesAttributes() {
|
||
|
||
return getSlides().map( slide => {
|
||
|
||
let attributes = {};
|
||
for( let i = 0; i < slide.attributes.length; i++ ) {
|
||
let attribute = slide.attributes[ i ];
|
||
attributes[ attribute.name ] = attribute.value;
|
||
}
|
||
return attributes;
|
||
|
||
} );
|
||
|
||
}
|
||
|
||
/**
|
||
* Retrieves the total number of slides in this presentation.
|
||
*
|
||
* @return {number}
|
||
*/
|
||
function getTotalSlides() {
|
||
|
||
return getSlides().length;
|
||
|
||
}
|
||
|
||
/**
|
||
* Returns the slide element matching the specified index.
|
||
*
|
||
* @return {HTMLElement}
|
||
*/
|
||
function getSlide( x, y ) {
|
||
|
||
let horizontalSlide = getHorizontalSlides()[ x ];
|
||
let verticalSlides = horizontalSlide && horizontalSlide.querySelectorAll( 'section' );
|
||
|
||
if( verticalSlides && verticalSlides.length && typeof y === 'number' ) {
|
||
return verticalSlides ? verticalSlides[ y ] : undefined;
|
||
}
|
||
|
||
return horizontalSlide;
|
||
|
||
}
|
||
|
||
/**
|
||
* Returns the background element for the given slide.
|
||
* All slides, even the ones with no background properties
|
||
* defined, have a background element so as long as the
|
||
* index is valid an element will be returned.
|
||
*
|
||
* @param {mixed} x Horizontal background index OR a slide
|
||
* HTML element
|
||
* @param {number} y Vertical background index
|
||
* @return {(HTMLElement[]|*)}
|
||
*/
|
||
function getSlideBackground( x, y ) {
|
||
|
||
let slide = typeof x === 'number' ? getSlide( x, y ) : x;
|
||
if( slide ) {
|
||
return slide.slideBackgroundElement;
|
||
}
|
||
|
||
return undefined;
|
||
|
||
}
|
||
|
||
/**
|
||
* Retrieves the current state of the presentation as
|
||
* an object. This state can then be restored at any
|
||
* time.
|
||
*
|
||
* @return {{indexh: number, indexv: number, indexf: number, paused: boolean, overview: boolean}}
|
||
*/
|
||
function getState() {
|
||
|
||
let indices = getIndices();
|
||
|
||
return {
|
||
indexh: indices.h,
|
||
indexv: indices.v,
|
||
indexf: indices.f,
|
||
paused: isPaused(),
|
||
overview: overview.isActive()
|
||
};
|
||
|
||
}
|
||
|
||
/**
|
||
* Restores the presentation to the given state.
|
||
*
|
||
* @param {object} state As generated by getState()
|
||
* @see {@link getState} generates the parameter `state`
|
||
*/
|
||
function setState( state ) {
|
||
|
||
if( typeof state === 'object' ) {
|
||
slide( deserialize( state.indexh ), deserialize( state.indexv ), deserialize( state.indexf ) );
|
||
|
||
let pausedFlag = deserialize( state.paused ),
|
||
overviewFlag = deserialize( state.overview );
|
||
|
||
if( typeof pausedFlag === 'boolean' && pausedFlag !== isPaused() ) {
|
||
togglePause( pausedFlag );
|
||
}
|
||
|
||
if( typeof overviewFlag === 'boolean' && overviewFlag !== overview.isActive() ) {
|
||
overview.toggle( overviewFlag );
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Cues a new automated slide if enabled in the config.
|
||
*/
|
||
function cueAutoSlide() {
|
||
|
||
cancelAutoSlide();
|
||
|
||
if( currentSlide && config.autoSlide !== false ) {
|
||
|
||
let fragment = currentSlide.querySelector( '.current-fragment' );
|
||
|
||
// When the slide first appears there is no "current" fragment so
|
||
// we look for a data-autoslide timing on the first fragment
|
||
if( !fragment ) fragment = currentSlide.querySelector( '.fragment' );
|
||
|
||
let fragmentAutoSlide = fragment ? fragment.getAttribute( 'data-autoslide' ) : null;
|
||
let parentAutoSlide = currentSlide.parentNode ? currentSlide.parentNode.getAttribute( 'data-autoslide' ) : null;
|
||
let slideAutoSlide = currentSlide.getAttribute( 'data-autoslide' );
|
||
|
||
// Pick value in the following priority order:
|
||
// 1. Current fragment's data-autoslide
|
||
// 2. Current slide's data-autoslide
|
||
// 3. Parent slide's data-autoslide
|
||
// 4. Global autoSlide setting
|
||
if( fragmentAutoSlide ) {
|
||
autoSlide = parseInt( fragmentAutoSlide, 10 );
|
||
}
|
||
else if( slideAutoSlide ) {
|
||
autoSlide = parseInt( slideAutoSlide, 10 );
|
||
}
|
||
else if( parentAutoSlide ) {
|
||
autoSlide = parseInt( parentAutoSlide, 10 );
|
||
}
|
||
else {
|
||
autoSlide = config.autoSlide;
|
||
}
|
||
|
||
// If there are media elements with data-autoplay,
|
||
// automatically set the autoSlide duration to the
|
||
// length of that media. Not applicable if the slide
|
||
// is divided up into fragments.
|
||
// playbackRate is accounted for in the duration.
|
||
if( currentSlide.querySelectorAll( '.fragment' ).length === 0 ) {
|
||
toArray( currentSlide.querySelectorAll( 'video, audio' ) ).forEach( el => {
|
||
if( el.hasAttribute( 'data-autoplay' ) ) {
|
||
if( autoSlide && (el.duration * 1000 / el.playbackRate ) > autoSlide ) {
|
||
autoSlide = ( el.duration * 1000 / el.playbackRate ) + 1000;
|
||
}
|
||
}
|
||
} );
|
||
}
|
||
|
||
// Cue the next auto-slide if:
|
||
// - There is an autoSlide value
|
||
// - Auto-sliding isn't paused by the user
|
||
// - The presentation isn't paused
|
||
// - The overview isn't active
|
||
// - The presentation isn't over
|
||
if( autoSlide && !autoSlidePaused && !isPaused() && !overview.isActive() && ( !isLastSlide() || fragments.availableRoutes().next || config.loop === true ) ) {
|
||
autoSlideTimeout = setTimeout( () => {
|
||
if( typeof config.autoSlideMethod === 'function' ) {
|
||
config.autoSlideMethod()
|
||
}
|
||
else {
|
||
navigateNext();
|
||
}
|
||
cueAutoSlide();
|
||
}, autoSlide );
|
||
autoSlideStartTime = Date.now();
|
||
}
|
||
|
||
if( autoSlidePlayer ) {
|
||
autoSlidePlayer.setPlaying( autoSlideTimeout !== -1 );
|
||
}
|
||
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Cancels any ongoing request to auto-slide.
|
||
*/
|
||
function cancelAutoSlide() {
|
||
|
||
clearTimeout( autoSlideTimeout );
|
||
autoSlideTimeout = -1;
|
||
|
||
}
|
||
|
||
function pauseAutoSlide() {
|
||
|
||
if( autoSlide && !autoSlidePaused ) {
|
||
autoSlidePaused = true;
|
||
dispatchEvent({ type: 'autoslidepaused' });
|
||
clearTimeout( autoSlideTimeout );
|
||
|
||
if( autoSlidePlayer ) {
|
||
autoSlidePlayer.setPlaying( false );
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
function resumeAutoSlide() {
|
||
|
||
if( autoSlide && autoSlidePaused ) {
|
||
autoSlidePaused = false;
|
||
dispatchEvent({ type: 'autoslideresumed' });
|
||
cueAutoSlide();
|
||
}
|
||
|
||
}
|
||
|
||
function navigateLeft() {
|
||
|
||
hasNavigatedHorizontally = true;
|
||
|
||
// Reverse for RTL
|
||
if( config.rtl ) {
|
||
if( ( overview.isActive() || fragments.next() === false ) && availableRoutes().left ) {
|
||
slide( indexh + 1, config.navigationMode === 'grid' ? indexv : undefined );
|
||
}
|
||
}
|
||
// Normal navigation
|
||
else if( ( overview.isActive() || fragments.prev() === false ) && availableRoutes().left ) {
|
||
slide( indexh - 1, config.navigationMode === 'grid' ? indexv : undefined );
|
||
}
|
||
|
||
}
|
||
|
||
function navigateRight() {
|
||
|
||
hasNavigatedHorizontally = true;
|
||
|
||
// Reverse for RTL
|
||
if( config.rtl ) {
|
||
if( ( overview.isActive() || fragments.prev() === false ) && availableRoutes().right ) {
|
||
slide( indexh - 1, config.navigationMode === 'grid' ? indexv : undefined );
|
||
}
|
||
}
|
||
// Normal navigation
|
||
else if( ( overview.isActive() || fragments.next() === false ) && availableRoutes().right ) {
|
||
slide( indexh + 1, config.navigationMode === 'grid' ? indexv : undefined );
|
||
}
|
||
|
||
}
|
||
|
||
function navigateUp() {
|
||
|
||
// Prioritize hiding fragments
|
||
if( ( overview.isActive() || fragments.prev() === false ) && availableRoutes().up ) {
|
||
slide( indexh, indexv - 1 );
|
||
}
|
||
|
||
}
|
||
|
||
function navigateDown() {
|
||
|
||
hasNavigatedVertically = true;
|
||
|
||
// Prioritize revealing fragments
|
||
if( ( overview.isActive() || fragments.next() === false ) && availableRoutes().down ) {
|
||
slide( indexh, indexv + 1 );
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Navigates backwards, prioritized in the following order:
|
||
* 1) Previous fragment
|
||
* 2) Previous vertical slide
|
||
* 3) Previous horizontal slide
|
||
*/
|
||
function navigatePrev() {
|
||
|
||
// Prioritize revealing fragments
|
||
if( fragments.prev() === false ) {
|
||
if( availableRoutes().up ) {
|
||
navigateUp();
|
||
}
|
||
else {
|
||
// Fetch the previous horizontal slide, if there is one
|
||
let previousSlide;
|
||
|
||
if( config.rtl ) {
|
||
previousSlide = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR + '.future' ) ).pop();
|
||
}
|
||
else {
|
||
previousSlide = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR + '.past' ) ).pop();
|
||
}
|
||
|
||
if( previousSlide ) {
|
||
let v = ( previousSlide.querySelectorAll( 'section' ).length - 1 ) || undefined;
|
||
let h = indexh - 1;
|
||
slide( h, v );
|
||
}
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* The reverse of #navigatePrev().
|
||
*/
|
||
function navigateNext() {
|
||
|
||
hasNavigatedHorizontally = true;
|
||
hasNavigatedVertically = true;
|
||
|
||
// Prioritize revealing fragments
|
||
if( fragments.next() === false ) {
|
||
|
||
let routes = availableRoutes();
|
||
|
||
// When looping is enabled `routes.down` is always available
|
||
// so we need a separate check for when we've reached the
|
||
// end of a stack and should move horizontally
|
||
if( routes.down && routes.right && config.loop && isLastVerticalSlide( currentSlide ) ) {
|
||
routes.down = false;
|
||
}
|
||
|
||
if( routes.down ) {
|
||
navigateDown();
|
||
}
|
||
else if( config.rtl ) {
|
||
navigateLeft();
|
||
}
|
||
else {
|
||
navigateRight();
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
|
||
// --------------------------------------------------------------------//
|
||
// ----------------------------- EVENTS -------------------------------//
|
||
// --------------------------------------------------------------------//
|
||
|
||
/**
|
||
* Called by all event handlers that are based on user
|
||
* input.
|
||
*
|
||
* @param {object} [event]
|
||
*/
|
||
function onUserInput( event ) {
|
||
|
||
if( config.autoSlideStoppable ) {
|
||
pauseAutoSlide();
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Called whenever there is mouse input at the document level
|
||
* to determine if the cursor is active or not.
|
||
*
|
||
* @param {object} event
|
||
*/
|
||
function onDocumentCursorActive( event ) {
|
||
|
||
showCursor();
|
||
|
||
clearTimeout( cursorInactiveTimeout );
|
||
|
||
cursorInactiveTimeout = setTimeout( hideCursor, config.hideCursorTime );
|
||
|
||
}
|
||
|
||
/**
|
||
* Handles mouse wheel scrolling, throttled to avoid skipping
|
||
* multiple slides.
|
||
*
|
||
* @param {object} event
|
||
*/
|
||
function onDocumentMouseScroll( event ) {
|
||
|
||
if( Date.now() - lastMouseWheelStep > 600 ) {
|
||
|
||
lastMouseWheelStep = Date.now();
|
||
|
||
let delta = event.detail || -event.wheelDelta;
|
||
if( delta > 0 ) {
|
||
navigateNext();
|
||
}
|
||
else if( delta < 0 ) {
|
||
navigatePrev();
|
||
}
|
||
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Clicking on the progress bar results in a navigation to the
|
||
* closest approximate horizontal slide using this equation:
|
||
*
|
||
* ( clickX / presentationWidth ) * numberOfSlides
|
||
*
|
||
* @param {object} event
|
||
*/
|
||
function onProgressClicked( event ) {
|
||
|
||
onUserInput( event );
|
||
|
||
event.preventDefault();
|
||
|
||
let slidesTotal = getHorizontalSlides().length;
|
||
let slideIndex = Math.floor( ( event.clientX / dom.wrapper.offsetWidth ) * slidesTotal );
|
||
|
||
if( config.rtl ) {
|
||
slideIndex = slidesTotal - slideIndex;
|
||
}
|
||
|
||
slide( slideIndex );
|
||
|
||
}
|
||
|
||
/**
|
||
* Event handler for navigation control buttons.
|
||
*/
|
||
function onNavigateLeftClicked( event ) { event.preventDefault(); onUserInput(); config.navigationMode === 'linear' ? navigatePrev() : navigateLeft(); }
|
||
function onNavigateRightClicked( event ) { event.preventDefault(); onUserInput(); config.navigationMode === 'linear' ? navigateNext() : navigateRight(); }
|
||
function onNavigateUpClicked( event ) { event.preventDefault(); onUserInput(); navigateUp(); }
|
||
function onNavigateDownClicked( event ) { event.preventDefault(); onUserInput(); navigateDown(); }
|
||
function onNavigatePrevClicked( event ) { event.preventDefault(); onUserInput(); navigatePrev(); }
|
||
function onNavigateNextClicked( event ) { event.preventDefault(); onUserInput(); navigateNext(); }
|
||
|
||
/**
|
||
* Handler for the window level 'hashchange' event.
|
||
*
|
||
* @param {object} [event]
|
||
*/
|
||
function onWindowHashChange( event ) {
|
||
|
||
location.readURL();
|
||
|
||
}
|
||
|
||
/**
|
||
* Handler for the window level 'resize' event.
|
||
*
|
||
* @param {object} [event]
|
||
*/
|
||
function onWindowResize( event ) {
|
||
|
||
layout();
|
||
|
||
}
|
||
|
||
/**
|
||
* Handle for the window level 'visibilitychange' event.
|
||
*
|
||
* @param {object} [event]
|
||
*/
|
||
function onPageVisibilityChange( event ) {
|
||
|
||
// If, after clicking a link or similar and we're coming back,
|
||
// focus the document.body to ensure we can use keyboard shortcuts
|
||
if( document.hidden === false && document.activeElement !== document.body ) {
|
||
// Not all elements support .blur() - SVGs among them.
|
||
if( typeof document.activeElement.blur === 'function' ) {
|
||
document.activeElement.blur();
|
||
}
|
||
document.body.focus();
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Handles clicks on links that are set to preview in the
|
||
* iframe overlay.
|
||
*
|
||
* @param {object} event
|
||
*/
|
||
function onPreviewLinkClicked( event ) {
|
||
|
||
if( event.currentTarget && event.currentTarget.hasAttribute( 'href' ) ) {
|
||
let url = event.currentTarget.getAttribute( 'href' );
|
||
if( url ) {
|
||
showPreview( url );
|
||
event.preventDefault();
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Handles click on the auto-sliding controls element.
|
||
*
|
||
* @param {object} [event]
|
||
*/
|
||
function onAutoSlidePlayerClick( event ) {
|
||
|
||
// Replay
|
||
if( isLastSlide() && config.loop === false ) {
|
||
slide( 0, 0 );
|
||
resumeAutoSlide();
|
||
}
|
||
// Resume
|
||
else if( autoSlidePaused ) {
|
||
resumeAutoSlide();
|
||
}
|
||
// Pause
|
||
else {
|
||
pauseAutoSlide();
|
||
}
|
||
|
||
}
|
||
|
||
|
||
// --------------------------------------------------------------------//
|
||
// ------------------------------- API --------------------------------//
|
||
// --------------------------------------------------------------------//
|
||
|
||
|
||
return extend( Reveal, {
|
||
VERSION,
|
||
|
||
initialize,
|
||
configure,
|
||
|
||
sync,
|
||
syncSlide,
|
||
syncFragments: fragments.sync.bind( fragments ),
|
||
|
||
// Navigation methods
|
||
slide,
|
||
left: navigateLeft,
|
||
right: navigateRight,
|
||
up: navigateUp,
|
||
down: navigateDown,
|
||
prev: navigatePrev,
|
||
next: navigateNext,
|
||
|
||
// Deprecated aliases
|
||
navigateTo: slide,
|
||
navigateLeft: navigateLeft,
|
||
navigateRight: navigateRight,
|
||
navigateUp: navigateUp,
|
||
navigateDown: navigateDown,
|
||
navigatePrev: navigatePrev,
|
||
navigateNext: navigateNext,
|
||
|
||
// Fragment methods
|
||
navigateFragment: fragments.goto.bind( fragments ),
|
||
prevFragment: fragments.prev.bind( fragments ),
|
||
nextFragment: fragments.next.bind( fragments ),
|
||
|
||
// Forward event binding to the reveal DOM element
|
||
addEventListener: ( type, listener, useCapture ) => {
|
||
Reveal.getRevealElement().addEventListener( type, listener, useCapture );
|
||
},
|
||
removeEventListener: ( type, listener, useCapture ) => {
|
||
Reveal.getRevealElement().removeEventListener( type, listener, useCapture );
|
||
},
|
||
|
||
// Forces an update in slide layout
|
||
layout,
|
||
|
||
// Randomizes the order of slides
|
||
shuffle,
|
||
|
||
// Returns an object with the available routes as booleans (left/right/top/bottom)
|
||
availableRoutes,
|
||
|
||
// Returns an object with the available fragments as booleans (prev/next)
|
||
availableFragments: fragments.availableRoutes.bind( fragments ),
|
||
|
||
// Toggles a help overlay with keyboard shortcuts
|
||
toggleHelp,
|
||
|
||
// Toggles the overview mode on/off
|
||
toggleOverview: overview.toggle.bind( overview ),
|
||
|
||
// Toggles the "black screen" mode on/off
|
||
togglePause,
|
||
|
||
// Toggles the auto slide mode on/off
|
||
toggleAutoSlide,
|
||
|
||
// Slide navigation checks
|
||
isFirstSlide,
|
||
isLastSlide,
|
||
isLastVerticalSlide,
|
||
isVerticalSlide,
|
||
|
||
// State checks
|
||
isPaused,
|
||
isAutoSliding,
|
||
isSpeakerNotes: notes.isSpeakerNotes.bind( notes ),
|
||
isOverview: overview.isActive.bind( overview ),
|
||
isPrintingPDF: print.isPrintingPDF.bind( print ),
|
||
|
||
// Slide preloading
|
||
loadSlide: slideContent.load.bind( slideContent ),
|
||
unloadSlide: slideContent.unload.bind( slideContent ),
|
||
|
||
// Adds or removes all internal event listeners (such as keyboard)
|
||
addEventListeners,
|
||
removeEventListeners,
|
||
dispatchEvent,
|
||
|
||
// Facility for persisting and restoring the presentation state
|
||
getState,
|
||
setState,
|
||
|
||
// Presentation progress
|
||
getSlidePastCount,
|
||
|
||
// Presentation progress on range of 0-1
|
||
getProgress,
|
||
|
||
// Returns the indices of the current, or specified, slide
|
||
getIndices,
|
||
|
||
// Returns an Array of all slides
|
||
getSlides,
|
||
|
||
// Returns an Array of objects representing the attributes on
|
||
// the slides
|
||
getSlidesAttributes,
|
||
|
||
// Returns the total number of slides
|
||
getTotalSlides,
|
||
|
||
// Returns the slide element at the specified index
|
||
getSlide,
|
||
|
||
// Returns the slide background element at the specified index
|
||
getSlideBackground,
|
||
|
||
// Returns the speaker notes string for a slide, or null
|
||
getSlideNotes: notes.getSlideNotes.bind( notes ),
|
||
|
||
// Returns an array with all horizontal/vertical slides in the deck
|
||
getHorizontalSlides,
|
||
getVerticalSlides,
|
||
|
||
// Checks if the presentation contains two or more
|
||
// horizontal/vertical slides
|
||
hasHorizontalSlides,
|
||
hasVerticalSlides,
|
||
|
||
// Adds/removes a custom key binding
|
||
addKeyBinding: keyboard.addKeyBinding.bind( keyboard ),
|
||
removeKeyBinding: keyboard.removeKeyBinding.bind( keyboard ),
|
||
|
||
// Programmatically triggers a keyboard event
|
||
triggerKey: keyboard.triggerKey.bind( keyboard ),
|
||
|
||
// Registers a new shortcut to include in the help overlay
|
||
registerKeyboardShortcut: keyboard.registerKeyboardShortcut.bind( keyboard ),
|
||
|
||
// API for registering and retrieving plugins
|
||
registerPlugin: plugins.registerPlugin.bind( plugins ),
|
||
hasPlugin: plugins.hasPlugin.bind( plugins ),
|
||
getPlugin: plugins.getPlugin.bind( plugins ),
|
||
getPlugins: plugins.getRegisteredPlugins.bind( plugins ),
|
||
|
||
getComputedSlideSize,
|
||
|
||
// Returns the previous slide element, may be null
|
||
getPreviousSlide: () => previousSlide,
|
||
|
||
// Returns the current slide element
|
||
getCurrentSlide: () => currentSlide,
|
||
|
||
// Returns the current scale of the presentation content
|
||
getScale: () => scale,
|
||
|
||
// Returns the current configuration object
|
||
getConfig: () => config,
|
||
|
||
// Helper method, retrieves query string as a key:value map
|
||
getQueryHash,
|
||
|
||
// Returns reveal.js DOM elements
|
||
getRevealElement: () => dom.wrapper || document.querySelector( '.reveal' ),
|
||
getSlidesElement: () => dom.slides,
|
||
getBackgroundsElement: () => dom.background,
|
||
|
||
// Checks if reveal.js has been loaded and is ready for use
|
||
isReady: () => ready,
|
||
|
||
|
||
// The following API methods are primarily intended for use
|
||
// by reveal.js controllers
|
||
|
||
// Methods for announcing content to screen readers
|
||
announceStatus,
|
||
getStatusText,
|
||
|
||
print,
|
||
location,
|
||
overview,
|
||
fragments,
|
||
slideContent,
|
||
slideNumber,
|
||
|
||
onUserInput,
|
||
closeOverlay,
|
||
updateControls,
|
||
updateProgress,
|
||
updateSlidesVisibility,
|
||
layoutSlideContents,
|
||
transformSlides,
|
||
cueAutoSlide,
|
||
cancelAutoSlide
|
||
|
||
} );
|
||
|
||
};
|