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3079 lines
80 KiB
3079 lines
80 KiB
import SlideContent from './controllers/slidecontent.js'
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import SlideNumber from './controllers/slidenumber.js'
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import JumpToSlide from './controllers/jumptoslide.js'
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import Backgrounds from './controllers/backgrounds.js'
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import AutoAnimate from './controllers/autoanimate.js'
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import ScrollView from './controllers/scrollview.js'
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import PrintView from './controllers/printview.js'
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import Fragments from './controllers/fragments.js'
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import Overview from './controllers/overview.js'
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import Keyboard from './controllers/keyboard.js'
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import Location from './controllers/location.js'
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import Controls from './controllers/controls.js'
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import Progress from './controllers/progress.js'
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import Pointer from './controllers/pointer.js'
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import Plugins from './controllers/plugins.js'
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import Touch from './controllers/touch.js'
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import Focus from './controllers/focus.js'
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import Notes from './controllers/notes.js'
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import Playback from './components/playback.js'
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import defaultConfig from './config.js'
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import * as Util from './utils/util.js'
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import * as Device from './utils/device.js'
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import {
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SLIDES_SELECTOR,
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HORIZONTAL_SLIDES_SELECTOR,
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VERTICAL_SLIDES_SELECTOR,
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POST_MESSAGE_METHOD_BLACKLIST
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} from './utils/constants.js'
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// The reveal.js version
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export const VERSION = '5.1.0';
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/**
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* reveal.js
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* https://revealjs.com
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* MIT licensed
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*
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* Copyright (C) 2011-2022 Hakim El Hattab, https://hakim.se
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*/
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export default function( revealElement, options ) {
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// Support initialization with no args, one arg
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// [options] or two args [revealElement, options]
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if( arguments.length < 2 ) {
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options = arguments[0];
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revealElement = document.querySelector( '.reveal' );
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}
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const Reveal = {};
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// Configuration defaults, can be overridden at initialization time
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let config = {},
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// Flags if initialize() has been invoked for this reveal instance
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initialized = false,
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// Flags if reveal.js is loaded (has dispatched the 'ready' event)
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ready = false,
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// The horizontal and vertical index of the currently active slide
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indexh,
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indexv,
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// The previous and current slide HTML elements
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previousSlide,
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currentSlide,
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// Remember which directions that the user has navigated towards
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navigationHistory = {
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hasNavigatedHorizontally: false,
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hasNavigatedVertically: false
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},
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// Slides may have a data-state attribute which we pick up and apply
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// as a class to the body. This list contains the combined state of
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// all current slides.
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state = [],
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// The current scale of the presentation (see width/height config)
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scale = 1,
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// CSS transform that is currently applied to the slides container,
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// split into two groups
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slidesTransform = { layout: '', overview: '' },
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// Cached references to DOM elements
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dom = {},
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// Flags if the interaction event listeners are bound
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eventsAreBound = false,
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// The current slide transition state; idle or running
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transition = 'idle',
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// The current auto-slide duration
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autoSlide = 0,
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// Auto slide properties
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autoSlidePlayer,
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autoSlideTimeout = 0,
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autoSlideStartTime = -1,
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autoSlidePaused = false,
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// Controllers for different aspects of our presentation. They're
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// all given direct references to this Reveal instance since there
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// may be multiple presentations running in parallel.
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slideContent = new SlideContent( Reveal ),
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slideNumber = new SlideNumber( Reveal ),
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jumpToSlide = new JumpToSlide( Reveal ),
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autoAnimate = new AutoAnimate( Reveal ),
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backgrounds = new Backgrounds( Reveal ),
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scrollView = new ScrollView( Reveal ),
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printView = new PrintView( Reveal ),
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fragments = new Fragments( Reveal ),
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overview = new Overview( Reveal ),
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keyboard = new Keyboard( Reveal ),
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location = new Location( Reveal ),
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controls = new Controls( Reveal ),
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progress = new Progress( Reveal ),
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pointer = new Pointer( Reveal ),
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plugins = new Plugins( Reveal ),
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focus = new Focus( Reveal ),
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touch = new Touch( Reveal ),
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notes = new Notes( Reveal );
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/**
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* Starts up the presentation.
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*/
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function initialize( initOptions ) {
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if( !revealElement ) throw 'Unable to find presentation root (<div class="reveal">).';
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initialized = true;
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// Cache references to key DOM elements
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dom.wrapper = revealElement;
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dom.slides = revealElement.querySelector( '.slides' );
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if( !dom.slides ) throw 'Unable to find slides container (<div class="slides">).';
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// Compose our config object in order of increasing precedence:
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// 1. Default reveal.js options
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// 2. Options provided via Reveal.configure() prior to
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// initialization
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// 3. Options passed to the Reveal constructor
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// 4. Options passed to Reveal.initialize
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// 5. Query params
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config = { ...defaultConfig, ...config, ...options, ...initOptions, ...Util.getQueryHash() };
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// Legacy support for the ?print-pdf query
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if( /print-pdf/gi.test( window.location.search ) ) {
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config.view = 'print';
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}
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setViewport();
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// Force a layout when the whole page, incl fonts, has loaded
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window.addEventListener( 'load', layout, false );
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// Register plugins and load dependencies, then move on to #start()
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plugins.load( config.plugins, config.dependencies ).then( start );
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return new Promise( resolve => Reveal.on( 'ready', resolve ) );
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}
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/**
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* Encase the presentation in a reveal.js viewport. The
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* extent of the viewport differs based on configuration.
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*/
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function setViewport() {
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// Embedded decks use the reveal element as their viewport
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if( config.embedded === true ) {
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dom.viewport = Util.closest( revealElement, '.reveal-viewport' ) || revealElement;
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}
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// Full-page decks use the body as their viewport
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else {
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dom.viewport = document.body;
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document.documentElement.classList.add( 'reveal-full-page' );
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}
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dom.viewport.classList.add( 'reveal-viewport' );
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}
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/**
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* Starts up reveal.js by binding input events and navigating
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* to the current URL deeplink if there is one.
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*/
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function start() {
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// Don't proceed if this instance has been destroyed
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if( initialized === false ) return;
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ready = true;
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// Remove slides hidden with data-visibility
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removeHiddenSlides();
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// Make sure we've got all the DOM elements we need
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setupDOM();
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// Listen to messages posted to this window
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setupPostMessage();
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// Prevent the slides from being scrolled out of view
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setupScrollPrevention();
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// Adds bindings for fullscreen mode
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setupFullscreen();
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// Resets all vertical slides so that only the first is visible
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resetVerticalSlides();
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// Updates the presentation to match the current configuration values
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configure();
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// Create slide backgrounds
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backgrounds.update( true );
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// Activate the print/scroll view if configured
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activateInitialView();
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// Read the initial hash
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location.readURL();
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// Notify listeners that the presentation is ready but use a 1ms
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// timeout to ensure it's not fired synchronously after #initialize()
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setTimeout( () => {
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// Enable transitions now that we're loaded
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dom.slides.classList.remove( 'no-transition' );
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dom.wrapper.classList.add( 'ready' );
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dispatchEvent({
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type: 'ready',
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data: {
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indexh,
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indexv,
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currentSlide
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}
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});
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}, 1 );
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}
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/**
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* Activates the correct reveal.js view based on our config.
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* This is only invoked once during initialization.
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*/
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function activateInitialView() {
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const activatePrintView = config.view === 'print';
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const activateScrollView = config.view === 'scroll' || config.view === 'reader';
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if( activatePrintView || activateScrollView ) {
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if( activatePrintView ) {
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removeEventListeners();
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}
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else {
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touch.unbind();
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}
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// Avoid content flickering during layout
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dom.viewport.classList.add( 'loading-scroll-mode' );
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if( activatePrintView ) {
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// The document needs to have loaded for the PDF layout
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// measurements to be accurate
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if( document.readyState === 'complete' ) {
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printView.activate();
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}
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else {
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window.addEventListener( 'load', () => printView.activate() );
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}
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}
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else {
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scrollView.activate();
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}
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}
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}
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/**
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* Removes all slides with data-visibility="hidden". This
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* is done right before the rest of the presentation is
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* initialized.
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*
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* If you want to show all hidden slides, initialize
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* reveal.js with showHiddenSlides set to true.
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*/
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function removeHiddenSlides() {
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if( !config.showHiddenSlides ) {
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Util.queryAll( dom.wrapper, 'section[data-visibility="hidden"]' ).forEach( slide => {
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const parent = slide.parentNode;
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// If this slide is part of a stack and that stack will be
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// empty after removing the hidden slide, remove the entire
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// stack
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if( parent.childElementCount === 1 && /section/i.test( parent.nodeName ) ) {
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parent.remove();
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}
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else {
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slide.remove();
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}
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} );
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}
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}
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/**
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* Finds and stores references to DOM elements which are
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* required by the presentation. If a required element is
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* not found, it is created.
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*/
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function setupDOM() {
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// Prevent transitions while we're loading
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dom.slides.classList.add( 'no-transition' );
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if( Device.isMobile ) {
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dom.wrapper.classList.add( 'no-hover' );
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}
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else {
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dom.wrapper.classList.remove( 'no-hover' );
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}
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backgrounds.render();
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slideNumber.render();
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jumpToSlide.render();
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controls.render();
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progress.render();
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notes.render();
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// Overlay graphic which is displayed during the paused mode
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dom.pauseOverlay = Util.createSingletonNode( dom.wrapper, 'div', 'pause-overlay', config.controls ? '<button class="resume-button">Resume presentation</button>' : null );
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dom.statusElement = createStatusElement();
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dom.wrapper.setAttribute( 'role', 'application' );
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}
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/**
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* Creates a hidden div with role aria-live to announce the
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* current slide content. Hide the div off-screen to make it
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* available only to Assistive Technologies.
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*
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* @return {HTMLElement}
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*/
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function createStatusElement() {
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let statusElement = dom.wrapper.querySelector( '.aria-status' );
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if( !statusElement ) {
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statusElement = document.createElement( 'div' );
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statusElement.style.position = 'absolute';
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statusElement.style.height = '1px';
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statusElement.style.width = '1px';
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statusElement.style.overflow = 'hidden';
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statusElement.style.clip = 'rect( 1px, 1px, 1px, 1px )';
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statusElement.classList.add( 'aria-status' );
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statusElement.setAttribute( 'aria-live', 'polite' );
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statusElement.setAttribute( 'aria-atomic','true' );
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dom.wrapper.appendChild( statusElement );
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}
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return statusElement;
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}
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/**
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* Announces the given text to screen readers.
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*/
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function announceStatus( value ) {
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dom.statusElement.textContent = value;
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}
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/**
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* Converts the given HTML element into a string of text
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* that can be announced to a screen reader. Hidden
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* elements are excluded.
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*/
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function getStatusText( node ) {
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let text = '';
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// Text node
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if( node.nodeType === 3 ) {
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text += node.textContent;
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}
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// Element node
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else if( node.nodeType === 1 ) {
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let isAriaHidden = node.getAttribute( 'aria-hidden' );
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let isDisplayHidden = window.getComputedStyle( node )['display'] === 'none';
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if( isAriaHidden !== 'true' && !isDisplayHidden ) {
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Array.from( node.childNodes ).forEach( child => {
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text += getStatusText( child );
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} );
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}
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}
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text = text.trim();
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return text === '' ? '' : text + ' ';
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}
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/**
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* This is an unfortunate necessity. Some actions – such as
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* an input field being focused in an iframe or using the
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* keyboard to expand text selection beyond the bounds of
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* a slide – can trigger our content to be pushed out of view.
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* This scrolling can not be prevented by hiding overflow in
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* CSS (we already do) so we have to resort to repeatedly
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* checking if the slides have been offset :(
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*/
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function setupScrollPrevention() {
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setInterval( () => {
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if( !scrollView.isActive() && dom.wrapper.scrollTop !== 0 || dom.wrapper.scrollLeft !== 0 ) {
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dom.wrapper.scrollTop = 0;
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dom.wrapper.scrollLeft = 0;
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}
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}, 1000 );
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}
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/**
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* After entering fullscreen we need to force a layout to
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* get our presentations to scale correctly. This behavior
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* is inconsistent across browsers but a force layout seems
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* to normalize it.
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*/
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function setupFullscreen() {
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document.addEventListener( 'fullscreenchange', onFullscreenChange );
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document.addEventListener( 'webkitfullscreenchange', onFullscreenChange );
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}
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/**
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* Registers a listener to postMessage events, this makes it
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* possible to call all reveal.js API methods from another
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* window. For example:
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*
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* revealWindow.postMessage( JSON.stringify({
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* method: 'slide',
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* args: [ 2 ]
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* }), '*' );
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*/
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function setupPostMessage() {
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if( config.postMessage ) {
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window.addEventListener( 'message', onPostMessage, false );
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}
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}
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/**
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* Applies the configuration settings from the config
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* object. May be called multiple times.
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*
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* @param {object} options
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*/
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function configure( options ) {
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const oldConfig = { ...config }
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// New config options may be passed when this method
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// is invoked through the API after initialization
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if( typeof options === 'object' ) Util.extend( config, options );
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// Abort if reveal.js hasn't finished loading, config
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// changes will be applied automatically once ready
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if( Reveal.isReady() === false ) return;
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const numberOfSlides = dom.wrapper.querySelectorAll( SLIDES_SELECTOR ).length;
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// The transition is added as a class on the .reveal element
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dom.wrapper.classList.remove( oldConfig.transition );
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dom.wrapper.classList.add( config.transition );
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dom.wrapper.setAttribute( 'data-transition-speed', config.transitionSpeed );
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dom.wrapper.setAttribute( 'data-background-transition', config.backgroundTransition );
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// Expose our configured slide dimensions as custom props
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dom.viewport.style.setProperty( '--slide-width', typeof config.width === 'string' ? config.width : config.width + 'px' );
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dom.viewport.style.setProperty( '--slide-height', typeof config.height === 'string' ? config.height : config.height + 'px' );
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if( config.shuffle ) {
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shuffle();
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}
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Util.toggleClass( dom.wrapper, 'embedded', config.embedded );
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Util.toggleClass( dom.wrapper, 'rtl', config.rtl );
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Util.toggleClass( dom.wrapper, 'center', config.center );
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// Exit the paused mode if it was configured off
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if( config.pause === false ) {
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resume();
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}
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// Iframe link previews
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if( config.previewLinks ) {
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enablePreviewLinks();
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disablePreviewLinks( '[data-preview-link=false]' );
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}
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else {
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disablePreviewLinks();
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enablePreviewLinks( '[data-preview-link]:not([data-preview-link=false])' );
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}
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// Reset all changes made by auto-animations
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autoAnimate.reset();
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// Remove existing auto-slide controls
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|
if( autoSlidePlayer ) {
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autoSlidePlayer.destroy();
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autoSlidePlayer = null;
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}
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|
|
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// Generate auto-slide controls if needed
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|
if( numberOfSlides > 1 && config.autoSlide && config.autoSlideStoppable ) {
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autoSlidePlayer = new Playback( dom.wrapper, () => {
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return Math.min( Math.max( ( Date.now() - autoSlideStartTime ) / autoSlide, 0 ), 1 );
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} );
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autoSlidePlayer.on( 'click', onAutoSlidePlayerClick );
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autoSlidePaused = false;
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}
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// Add the navigation mode to the DOM so we can adjust styling
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|
if( config.navigationMode !== 'default' ) {
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dom.wrapper.setAttribute( 'data-navigation-mode', config.navigationMode );
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}
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else {
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dom.wrapper.removeAttribute( 'data-navigation-mode' );
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}
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notes.configure( config, oldConfig );
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focus.configure( config, oldConfig );
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pointer.configure( config, oldConfig );
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controls.configure( config, oldConfig );
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progress.configure( config, oldConfig );
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keyboard.configure( config, oldConfig );
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fragments.configure( config, oldConfig );
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slideNumber.configure( config, oldConfig );
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sync();
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}
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/**
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|
* Binds all event listeners.
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|
*/
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|
function addEventListeners() {
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eventsAreBound = true;
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window.addEventListener( 'resize', onWindowResize, false );
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if( config.touch ) touch.bind();
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if( config.keyboard ) keyboard.bind();
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if( config.progress ) progress.bind();
|
|
if( config.respondToHashChanges ) location.bind();
|
|
controls.bind();
|
|
focus.bind();
|
|
|
|
dom.slides.addEventListener( 'click', onSlidesClicked, false );
|
|
dom.slides.addEventListener( 'transitionend', onTransitionEnd, false );
|
|
dom.pauseOverlay.addEventListener( 'click', resume, false );
|
|
|
|
if( config.focusBodyOnPageVisibilityChange ) {
|
|
document.addEventListener( 'visibilitychange', onPageVisibilityChange, false );
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* Unbinds all event listeners.
|
|
*/
|
|
function removeEventListeners() {
|
|
|
|
eventsAreBound = false;
|
|
|
|
touch.unbind();
|
|
focus.unbind();
|
|
keyboard.unbind();
|
|
controls.unbind();
|
|
progress.unbind();
|
|
location.unbind();
|
|
|
|
window.removeEventListener( 'resize', onWindowResize, false );
|
|
|
|
dom.slides.removeEventListener( 'click', onSlidesClicked, false );
|
|
dom.slides.removeEventListener( 'transitionend', onTransitionEnd, false );
|
|
dom.pauseOverlay.removeEventListener( 'click', resume, false );
|
|
|
|
}
|
|
|
|
/**
|
|
* Uninitializes reveal.js by undoing changes made to the
|
|
* DOM and removing all event listeners.
|
|
*/
|
|
function destroy() {
|
|
|
|
initialized = false;
|
|
|
|
// There's nothing to destroy if this instance hasn't finished
|
|
// initializing
|
|
if( ready === false ) return;
|
|
|
|
removeEventListeners();
|
|
cancelAutoSlide();
|
|
disablePreviewLinks();
|
|
|
|
// Destroy controllers
|
|
notes.destroy();
|
|
focus.destroy();
|
|
plugins.destroy();
|
|
pointer.destroy();
|
|
controls.destroy();
|
|
progress.destroy();
|
|
backgrounds.destroy();
|
|
slideNumber.destroy();
|
|
jumpToSlide.destroy();
|
|
|
|
// Remove event listeners
|
|
document.removeEventListener( 'fullscreenchange', onFullscreenChange );
|
|
document.removeEventListener( 'webkitfullscreenchange', onFullscreenChange );
|
|
document.removeEventListener( 'visibilitychange', onPageVisibilityChange, false );
|
|
window.removeEventListener( 'message', onPostMessage, false );
|
|
window.removeEventListener( 'load', layout, false );
|
|
|
|
// Undo DOM changes
|
|
if( dom.pauseOverlay ) dom.pauseOverlay.remove();
|
|
if( dom.statusElement ) dom.statusElement.remove();
|
|
|
|
document.documentElement.classList.remove( 'reveal-full-page' );
|
|
|
|
dom.wrapper.classList.remove( 'ready', 'center', 'has-horizontal-slides', 'has-vertical-slides' );
|
|
dom.wrapper.removeAttribute( 'data-transition-speed' );
|
|
dom.wrapper.removeAttribute( 'data-background-transition' );
|
|
|
|
dom.viewport.classList.remove( 'reveal-viewport' );
|
|
dom.viewport.style.removeProperty( '--slide-width' );
|
|
dom.viewport.style.removeProperty( '--slide-height' );
|
|
|
|
dom.slides.style.removeProperty( 'width' );
|
|
dom.slides.style.removeProperty( 'height' );
|
|
dom.slides.style.removeProperty( 'zoom' );
|
|
dom.slides.style.removeProperty( 'left' );
|
|
dom.slides.style.removeProperty( 'top' );
|
|
dom.slides.style.removeProperty( 'bottom' );
|
|
dom.slides.style.removeProperty( 'right' );
|
|
dom.slides.style.removeProperty( 'transform' );
|
|
|
|
Array.from( dom.wrapper.querySelectorAll( SLIDES_SELECTOR ) ).forEach( slide => {
|
|
slide.style.removeProperty( 'display' );
|
|
slide.style.removeProperty( 'top' );
|
|
slide.removeAttribute( 'hidden' );
|
|
slide.removeAttribute( 'aria-hidden' );
|
|
} );
|
|
|
|
}
|
|
|
|
/**
|
|
* Adds a listener to one of our custom reveal.js events,
|
|
* like slidechanged.
|
|
*/
|
|
function on( type, listener, useCapture ) {
|
|
|
|
revealElement.addEventListener( type, listener, useCapture );
|
|
|
|
}
|
|
|
|
/**
|
|
* Unsubscribes from a reveal.js event.
|
|
*/
|
|
function off( type, listener, useCapture ) {
|
|
|
|
revealElement.removeEventListener( type, listener, useCapture );
|
|
|
|
}
|
|
|
|
/**
|
|
* 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 ) {
|
|
Util.transformElement( dom.slides, slidesTransform.layout + ' ' + slidesTransform.overview );
|
|
}
|
|
else {
|
|
Util.transformElement( dom.slides, slidesTransform.overview );
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* 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 );
|
|
Util.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 );
|
|
}
|
|
|
|
return event;
|
|
|
|
}
|
|
|
|
/**
|
|
* Dispatches a slidechanged event.
|
|
*
|
|
* @param {string} origin Used to identify multiplex clients
|
|
*/
|
|
function dispatchSlideChanged( origin ) {
|
|
|
|
dispatchEvent({
|
|
type: 'slidechanged',
|
|
data: {
|
|
indexh,
|
|
indexv,
|
|
previousSlide,
|
|
currentSlide,
|
|
origin
|
|
}
|
|
});
|
|
|
|
}
|
|
|
|
/**
|
|
* 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()
|
|
};
|
|
|
|
Util.extend( message, data );
|
|
|
|
window.parent.postMessage( JSON.stringify( message ), '*' );
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* Bind preview frame links.
|
|
*
|
|
* @param {string} [selector=a] - selector for anchors
|
|
*/
|
|
function enablePreviewLinks( selector = 'a' ) {
|
|
|
|
Array.from( 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' ) {
|
|
|
|
Array.from( 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/>';
|
|
|
|
let shortcuts = keyboard.getShortcuts(),
|
|
bindings = keyboard.getBindings();
|
|
|
|
html += '<table><th>KEY</th><th>ACTION</th>';
|
|
for( let key in shortcuts ) {
|
|
html += `<tr><td>${key}</td><td>${shortcuts[ key ]}</td></tr>`;
|
|
}
|
|
|
|
// Add custom key bindings that have associated descriptions
|
|
for( let binding in bindings ) {
|
|
if( bindings[binding].key && bindings[binding].description ) {
|
|
html += `<tr><td>${bindings[binding].key}</td><td>${bindings[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 && !printView.isActive() ) {
|
|
|
|
const viewportWidth = dom.viewport.offsetWidth;
|
|
const viewportHeight = dom.viewport.offsetHeight;
|
|
|
|
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( Device.isMobile && !config.embedded ) {
|
|
document.documentElement.style.setProperty( '--vh', ( window.innerHeight * 0.01 ) + 'px' );
|
|
}
|
|
|
|
const size = scrollView.isActive() ?
|
|
getComputedSlideSize( viewportWidth, viewportHeight ) :
|
|
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 or we're
|
|
// in the scroll view
|
|
if( scale === 1 || scrollView.isActive() ) {
|
|
dom.slides.style.zoom = '';
|
|
dom.slides.style.left = '';
|
|
dom.slides.style.top = '';
|
|
dom.slides.style.bottom = '';
|
|
dom.slides.style.right = '';
|
|
transformSlides( { layout: '' } );
|
|
}
|
|
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 = Array.from( 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
|
|
}
|
|
});
|
|
}
|
|
}
|
|
|
|
checkResponsiveScrollView();
|
|
|
|
dom.viewport.style.setProperty( '--slide-scale', scale );
|
|
dom.viewport.style.setProperty( '--viewport-width', viewportWidth + 'px' );
|
|
dom.viewport.style.setProperty( '--viewport-height', viewportHeight + 'px' );
|
|
|
|
scrollView.layout();
|
|
|
|
progress.update();
|
|
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 'r-stretch' class
|
|
Util.queryAll( dom.slides, 'section > .stretch, section > .r-stretch' ).forEach( element => {
|
|
|
|
// Determine how much vertical space we can use
|
|
let remainingHeight = Util.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';
|
|
}
|
|
|
|
} );
|
|
|
|
}
|
|
|
|
/**
|
|
* Responsively activates the scroll mode when we reach the configured
|
|
* activation width.
|
|
*/
|
|
function checkResponsiveScrollView() {
|
|
|
|
// Only proceed if...
|
|
// 1. The DOM is ready
|
|
// 2. Layouts aren't disabled via config
|
|
// 3. We're not currently printing
|
|
// 4. There is a scrollActivationWidth set
|
|
// 5. The deck isn't configured to always use the scroll view
|
|
if(
|
|
dom.wrapper &&
|
|
!config.disableLayout &&
|
|
!printView.isActive() &&
|
|
typeof config.scrollActivationWidth === 'number' &&
|
|
config.view !== 'scroll'
|
|
) {
|
|
const size = getComputedSlideSize();
|
|
|
|
if( size.presentationWidth > 0 && size.presentationWidth <= config.scrollActivationWidth ) {
|
|
if( !scrollView.isActive() ) {
|
|
backgrounds.create();
|
|
scrollView.activate()
|
|
};
|
|
}
|
|
else {
|
|
if( scrollView.isActive() ) scrollView.deactivate();
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* 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 ) {
|
|
|
|
let width = config.width;
|
|
let height = config.height;
|
|
|
|
if( config.disableLayout ) {
|
|
width = dom.slides.offsetWidth;
|
|
height = dom.slides.offsetHeight;
|
|
}
|
|
|
|
const size = {
|
|
// Slide size
|
|
width: width,
|
|
height: 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 );
|
|
|
|
}
|
|
|
|
/**
|
|
* Checks if the current or specified slide is a stack containing
|
|
* vertical slides.
|
|
*
|
|
* @param {HTMLElement} [slide=currentSlide]
|
|
* @return {Boolean}
|
|
*/
|
|
function isVerticalStack( slide = currentSlide ) {
|
|
|
|
return slide.classList.contains( '.stack' ) || slide.querySelector( 'section' ) !== null;
|
|
|
|
}
|
|
|
|
/**
|
|
* 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 presentation. 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;
|
|
|
|
}
|
|
|
|
/**
|
|
* 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 visibility of the jump-to-slide UI.
|
|
*/
|
|
function toggleJumpToSlide( override ) {
|
|
|
|
if( typeof override === 'boolean' ) {
|
|
override ? jumpToSlide.show() : jumpToSlide.hide();
|
|
}
|
|
else {
|
|
jumpToSlide.isVisible() ? jumpToSlide.hide() : jumpToSlide.show();
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* 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} [origin] Origin for use in multimaster environments
|
|
*/
|
|
function slide( h, v, f, origin ) {
|
|
|
|
// Dispatch an event before the slide
|
|
const slidechange = dispatchEvent({
|
|
type: 'beforeslidechange',
|
|
data: {
|
|
indexh: h === undefined ? indexh : h,
|
|
indexv: v === undefined ? indexv : v,
|
|
origin
|
|
}
|
|
});
|
|
|
|
// Abort if this slide change was prevented by an event listener
|
|
if( slidechange.defaultPrevented ) return;
|
|
|
|
// Remember where we were at before
|
|
previousSlide = currentSlide;
|
|
|
|
// Query all horizontal slides in the deck
|
|
const horizontalSlides = dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR );
|
|
|
|
// If we're in scroll mode, we scroll the target slide into view
|
|
// instead of running our standard slide transition
|
|
if( scrollView.isActive() ) {
|
|
const scrollToSlide = scrollView.getSlideByIndices( h, v );
|
|
if( scrollToSlide ) scrollView.scrollToSlide( scrollToSlide );
|
|
return;
|
|
}
|
|
|
|
// 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 );
|
|
|
|
// Dispatch an event if the slide changed
|
|
let slideChanged = ( indexh !== indexhBefore || indexv !== indexvBefore );
|
|
|
|
// Ensure that the previous slide is never the same as the current
|
|
if( !slideChanged ) previousSlide = null;
|
|
|
|
// Find the current horizontal slide and any possible vertical slides
|
|
// within it
|
|
let currentHorizontalSlide = horizontalSlides[ indexh ],
|
|
currentVerticalSlides = currentHorizontalSlide.querySelectorAll( 'section' );
|
|
|
|
// Indicate when we're on a vertical slide
|
|
revealElement.classList.toggle( 'is-vertical-slide', currentVerticalSlides.length > 1 );
|
|
|
|
// Store references to the previous and current slides
|
|
currentSlide = currentVerticalSlides[ indexv ] || currentHorizontalSlide;
|
|
|
|
let autoAnimateTransition = false;
|
|
|
|
// Detect if we're moving between two auto-animated slides
|
|
if( slideChanged && previousSlide && currentSlide && !overview.isActive() ) {
|
|
transition = 'running';
|
|
|
|
autoAnimateTransition = shouldAutoAnimateBetween( previousSlide, currentSlide, indexhBefore, indexvBefore );
|
|
|
|
// If this is an auto-animated transition, we disable the
|
|
// regular slide transition
|
|
//
|
|
// Note 20-03-2020:
|
|
// This needs to happen before we update slide visibility,
|
|
// otherwise transitions will still run in Safari.
|
|
if( autoAnimateTransition ) {
|
|
dom.slides.classList.add( 'disable-slide-transitions' )
|
|
}
|
|
}
|
|
|
|
// 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();
|
|
}
|
|
|
|
// Show fragment, if specified
|
|
if( typeof f !== 'undefined' ) {
|
|
fragments.goto( f );
|
|
}
|
|
|
|
// 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;
|
|
}
|
|
}
|
|
|
|
dom.viewport.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 ) {
|
|
dom.viewport.classList.remove( stateBefore.pop() );
|
|
}
|
|
|
|
if( slideChanged ) {
|
|
dispatchSlideChanged( origin );
|
|
}
|
|
|
|
// Handle embedded content
|
|
if( slideChanged || !previousSlide ) {
|
|
slideContent.stopEmbeddedContent( previousSlide );
|
|
slideContent.startEmbeddedContent( currentSlide );
|
|
}
|
|
|
|
// Announce the current slide contents to screen readers
|
|
// Use animation frame to prevent getComputedStyle in getStatusText
|
|
// from triggering layout mid-frame
|
|
requestAnimationFrame( () => {
|
|
announceStatus( getStatusText( currentSlide ) );
|
|
});
|
|
|
|
progress.update();
|
|
controls.update();
|
|
notes.update();
|
|
backgrounds.update();
|
|
backgrounds.updateParallax();
|
|
slideNumber.update();
|
|
fragments.update();
|
|
|
|
// Update the URL hash
|
|
location.writeURL();
|
|
|
|
cueAutoSlide();
|
|
|
|
// Auto-animation
|
|
if( autoAnimateTransition ) {
|
|
|
|
setTimeout( () => {
|
|
dom.slides.classList.remove( 'disable-slide-transitions' );
|
|
}, 0 );
|
|
|
|
if( config.autoAnimate ) {
|
|
// Run the auto-animation between our slides
|
|
autoAnimate.run( previousSlide, currentSlide );
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* Checks whether or not an auto-animation should take place between
|
|
* the two given slides.
|
|
*
|
|
* @param {HTMLElement} fromSlide
|
|
* @param {HTMLElement} toSlide
|
|
* @param {number} indexhBefore
|
|
* @param {number} indexvBefore
|
|
*
|
|
* @returns {boolean}
|
|
*/
|
|
function shouldAutoAnimateBetween( fromSlide, toSlide, indexhBefore, indexvBefore ) {
|
|
|
|
return fromSlide.hasAttribute( 'data-auto-animate' ) && toSlide.hasAttribute( 'data-auto-animate' ) &&
|
|
fromSlide.getAttribute( 'data-auto-animate-id' ) === toSlide.getAttribute( 'data-auto-animate-id' ) &&
|
|
!( ( indexh > indexhBefore || indexv > indexvBefore ) ? toSlide : fromSlide ).hasAttribute( 'data-auto-animate-restart' );
|
|
|
|
}
|
|
|
|
/**
|
|
* Called anytime a new slide should be activated while in the scroll
|
|
* view. The active slide is the page that occupies the most space in
|
|
* the scrollable viewport.
|
|
*
|
|
* @param {number} pageIndex
|
|
* @param {HTMLElement} slideElement
|
|
*/
|
|
function setCurrentScrollPage( slideElement, h, v ) {
|
|
|
|
let indexhBefore = indexh || 0;
|
|
|
|
indexh = h;
|
|
indexv = v;
|
|
|
|
const slideChanged = currentSlide !== slideElement;
|
|
|
|
previousSlide = currentSlide;
|
|
currentSlide = slideElement;
|
|
|
|
if( currentSlide && previousSlide ) {
|
|
if( config.autoAnimate && shouldAutoAnimateBetween( previousSlide, currentSlide, indexhBefore, indexv ) ) {
|
|
// Run the auto-animation between our slides
|
|
autoAnimate.run( previousSlide, currentSlide );
|
|
}
|
|
}
|
|
|
|
// Start or stop embedded content like videos and iframes
|
|
if( slideChanged ) {
|
|
if( previousSlide ) {
|
|
slideContent.stopEmbeddedContent( previousSlide );
|
|
slideContent.stopEmbeddedContent( previousSlide.slideBackgroundElement );
|
|
}
|
|
|
|
slideContent.startEmbeddedContent( currentSlide );
|
|
slideContent.startEmbeddedContent( currentSlide.slideBackgroundElement );
|
|
}
|
|
|
|
requestAnimationFrame( () => {
|
|
announceStatus( getStatusText( currentSlide ) );
|
|
});
|
|
|
|
dispatchSlideChanged();
|
|
|
|
}
|
|
|
|
/**
|
|
* 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();
|
|
|
|
if( config.sortFragmentsOnSync === true ) {
|
|
fragments.sortAll();
|
|
}
|
|
|
|
controls.update();
|
|
progress.update();
|
|
|
|
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 => {
|
|
|
|
Util.queryAll( horizontalSlide, '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( slides = getHorizontalSlides() ) {
|
|
|
|
slides.forEach( ( slide, i ) => {
|
|
|
|
// Insert the slide next to a randomly picked sibling slide
|
|
// slide. This may cause the slide to insert before itself,
|
|
// but that's not an issue.
|
|
let beforeSlide = slides[ Math.floor( Math.random() * slides.length ) ];
|
|
if( beforeSlide.parentNode === slide.parentNode ) {
|
|
slide.parentNode.insertBefore( slide, beforeSlide );
|
|
}
|
|
|
|
// Randomize the order of vertical slides (if there are any)
|
|
let verticalSlides = slide.querySelectorAll( 'section' );
|
|
if( verticalSlides.length ) {
|
|
shuffle( verticalSlides );
|
|
}
|
|
|
|
} );
|
|
|
|
}
|
|
|
|
/**
|
|
* 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 = Util.queryAll( dom.wrapper, selector ),
|
|
slidesLength = slides.length;
|
|
|
|
let printMode = scrollView.isActive() || printView.isActive();
|
|
let loopedForwards = false;
|
|
let loopedBackwards = false;
|
|
|
|
if( slidesLength ) {
|
|
|
|
// Should the index loop?
|
|
if( config.loop ) {
|
|
if( index >= slidesLength ) loopedForwards = true;
|
|
|
|
index %= slidesLength;
|
|
|
|
if( index < 0 ) {
|
|
index = slidesLength + index;
|
|
loopedBackwards = true;
|
|
}
|
|
}
|
|
|
|
// 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 );
|
|
|
|
// Avoid .remove() with multiple args for IE11 support
|
|
element.classList.remove( 'past' );
|
|
element.classList.remove( 'present' );
|
|
element.classList.remove( '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
|
|
showFragmentsIn( element );
|
|
}
|
|
}
|
|
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
|
|
hideFragmentsIn( element );
|
|
}
|
|
}
|
|
// Update the visibility of fragments when a presentation loops
|
|
// in either direction
|
|
else if( i === index && config.fragments ) {
|
|
if( loopedForwards ) {
|
|
hideFragmentsIn( element );
|
|
}
|
|
else if( loopedBackwards ) {
|
|
showFragmentsIn( element );
|
|
}
|
|
}
|
|
}
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
/**
|
|
* Shows all fragment elements within the given container.
|
|
*/
|
|
function showFragmentsIn( container ) {
|
|
|
|
Util.queryAll( container, '.fragment' ).forEach( fragment => {
|
|
fragment.classList.add( 'visible' );
|
|
fragment.classList.remove( 'current-fragment' );
|
|
} );
|
|
|
|
}
|
|
|
|
/**
|
|
* Hides all fragment elements within the given container.
|
|
*/
|
|
function hideFragmentsIn( container ) {
|
|
|
|
Util.queryAll( container, '.fragment.visible' ).forEach( fragment => {
|
|
fragment.classList.remove( 'visible', 'current-fragment' );
|
|
} );
|
|
|
|
}
|
|
|
|
/**
|
|
* 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( Device.isMobile ) {
|
|
viewDistance = overview.isActive() ? 6 : config.mobileViewDistance;
|
|
}
|
|
|
|
// All slides need to be visible when exporting to PDF
|
|
if( printView.isActive() ) {
|
|
viewDistance = Number.MAX_VALUE;
|
|
}
|
|
|
|
for( let x = 0; x < horizontalSlidesLength; x++ ) {
|
|
let horizontalSlide = horizontalSlides[x];
|
|
|
|
let verticalSlides = Util.queryAll( horizontalSlide, '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' );
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* Determine what available routes there are for navigation.
|
|
*
|
|
* @return {{left: boolean, right: boolean, up: boolean, down: boolean}}
|
|
*/
|
|
function availableRoutes({ includeFragments = false } = {}) {
|
|
|
|
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;
|
|
}
|
|
|
|
// If includeFragments is set, a route will be considered
|
|
// available if either a slid OR fragment is available in
|
|
// the given direction
|
|
if( includeFragments === true ) {
|
|
let fragmentRoutes = fragments.availableRoutes();
|
|
routes.left = routes.left || fragmentRoutes.prev;
|
|
routes.up = routes.up || fragmentRoutes.prev;
|
|
routes.down = routes.down || fragmentRoutes.next;
|
|
routes.right = routes.right || fragmentRoutes.next;
|
|
}
|
|
|
|
// 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 ) {
|
|
// In scroll mode the original h/x index is stored on the slide
|
|
if( scrollView.isActive() ) {
|
|
h = parseInt( slide.getAttribute( 'data-index-h' ), 10 );
|
|
|
|
if( slide.getAttribute( 'data-index-v' ) ) {
|
|
v = parseInt( slide.getAttribute( 'data-index-v' ), 10 );
|
|
}
|
|
}
|
|
else {
|
|
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( Util.queryAll( slide.parentNode, '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 Util.queryAll( dom.wrapper, 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 Util.queryAll( dom.wrapper, HORIZONTAL_SLIDES_SELECTOR );
|
|
|
|
}
|
|
|
|
/**
|
|
* Returns all vertical slides that exist within this deck.
|
|
*/
|
|
function getVerticalSlides() {
|
|
|
|
return Util.queryAll( dom.wrapper, '.slides>section>section' );
|
|
|
|
}
|
|
|
|
/**
|
|
* Returns all vertical stacks (each stack can contain multiple slides).
|
|
*/
|
|
function getVerticalStacks() {
|
|
|
|
return Util.queryAll( dom.wrapper, 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( Util.deserialize( state.indexh ), Util.deserialize( state.indexv ), Util.deserialize( state.indexf ) );
|
|
|
|
let pausedFlag = Util.deserialize( state.paused ),
|
|
overviewFlag = Util.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[data-autoslide]' );
|
|
|
|
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 ) {
|
|
Util.queryAll( currentSlide, '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({skipFragments=false}={}) {
|
|
|
|
navigationHistory.hasNavigatedHorizontally = true;
|
|
|
|
// Scroll view navigation is handled independently
|
|
if( scrollView.isActive() ) return scrollView.prev();
|
|
|
|
// Reverse for RTL
|
|
if( config.rtl ) {
|
|
if( ( overview.isActive() || skipFragments || fragments.next() === false ) && availableRoutes().left ) {
|
|
slide( indexh + 1, config.navigationMode === 'grid' ? indexv : undefined );
|
|
}
|
|
}
|
|
// Normal navigation
|
|
else if( ( overview.isActive() || skipFragments || fragments.prev() === false ) && availableRoutes().left ) {
|
|
slide( indexh - 1, config.navigationMode === 'grid' ? indexv : undefined );
|
|
}
|
|
|
|
}
|
|
|
|
function navigateRight({skipFragments=false}={}) {
|
|
|
|
navigationHistory.hasNavigatedHorizontally = true;
|
|
|
|
// Scroll view navigation is handled independently
|
|
if( scrollView.isActive() ) return scrollView.next();
|
|
|
|
// Reverse for RTL
|
|
if( config.rtl ) {
|
|
if( ( overview.isActive() || skipFragments || fragments.prev() === false ) && availableRoutes().right ) {
|
|
slide( indexh - 1, config.navigationMode === 'grid' ? indexv : undefined );
|
|
}
|
|
}
|
|
// Normal navigation
|
|
else if( ( overview.isActive() || skipFragments || fragments.next() === false ) && availableRoutes().right ) {
|
|
slide( indexh + 1, config.navigationMode === 'grid' ? indexv : undefined );
|
|
}
|
|
|
|
}
|
|
|
|
function navigateUp({skipFragments=false}={}) {
|
|
|
|
// Scroll view navigation is handled independently
|
|
if( scrollView.isActive() ) return scrollView.prev();
|
|
|
|
// Prioritize hiding fragments
|
|
if( ( overview.isActive() || skipFragments || fragments.prev() === false ) && availableRoutes().up ) {
|
|
slide( indexh, indexv - 1 );
|
|
}
|
|
|
|
}
|
|
|
|
function navigateDown({skipFragments=false}={}) {
|
|
|
|
navigationHistory.hasNavigatedVertically = true;
|
|
|
|
// Scroll view navigation is handled independently
|
|
if( scrollView.isActive() ) return scrollView.next();
|
|
|
|
// Prioritize revealing fragments
|
|
if( ( overview.isActive() || skipFragments || 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({skipFragments=false}={}) {
|
|
|
|
// Scroll view navigation is handled independently
|
|
if( scrollView.isActive() ) return scrollView.prev();
|
|
|
|
// Prioritize revealing fragments
|
|
if( skipFragments || fragments.prev() === false ) {
|
|
if( availableRoutes().up ) {
|
|
navigateUp({skipFragments});
|
|
}
|
|
else {
|
|
// Fetch the previous horizontal slide, if there is one
|
|
let previousSlide;
|
|
|
|
if( config.rtl ) {
|
|
previousSlide = Util.queryAll( dom.wrapper, HORIZONTAL_SLIDES_SELECTOR + '.future' ).pop();
|
|
}
|
|
else {
|
|
previousSlide = Util.queryAll( dom.wrapper, HORIZONTAL_SLIDES_SELECTOR + '.past' ).pop();
|
|
}
|
|
|
|
// When going backwards and arriving on a stack we start
|
|
// at the bottom of the stack
|
|
if( previousSlide && previousSlide.classList.contains( 'stack' ) ) {
|
|
let v = ( previousSlide.querySelectorAll( 'section' ).length - 1 ) || undefined;
|
|
let h = indexh - 1;
|
|
slide( h, v );
|
|
}
|
|
else if( config.rtl ) {
|
|
navigateRight({skipFragments});
|
|
}
|
|
else {
|
|
navigateLeft({skipFragments});
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* The reverse of #navigatePrev().
|
|
*/
|
|
function navigateNext({skipFragments=false}={}) {
|
|
|
|
navigationHistory.hasNavigatedHorizontally = true;
|
|
navigationHistory.hasNavigatedVertically = true;
|
|
|
|
// Scroll view navigation is handled independently
|
|
if( scrollView.isActive() ) return scrollView.next();
|
|
|
|
// Prioritize revealing fragments
|
|
if( skipFragments || 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() ) {
|
|
routes.down = false;
|
|
}
|
|
|
|
if( routes.down ) {
|
|
navigateDown({skipFragments});
|
|
}
|
|
else if( config.rtl ) {
|
|
navigateLeft({skipFragments});
|
|
}
|
|
else {
|
|
navigateRight({skipFragments});
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
|
|
// --------------------------------------------------------------------//
|
|
// ----------------------------- EVENTS -------------------------------//
|
|
// --------------------------------------------------------------------//
|
|
|
|
/**
|
|
* Called by all event handlers that are based on user
|
|
* input.
|
|
*
|
|
* @param {object} [event]
|
|
*/
|
|
function onUserInput( event ) {
|
|
|
|
if( config.autoSlideStoppable ) {
|
|
pauseAutoSlide();
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* Listener for post message events posted to this window.
|
|
*/
|
|
function onPostMessage( 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' );
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* Event listener for transition end on the current slide.
|
|
*
|
|
* @param {object} [event]
|
|
*/
|
|
function onTransitionEnd( event ) {
|
|
|
|
if( transition === 'running' && /section/gi.test( event.target.nodeName ) ) {
|
|
transition = 'idle';
|
|
dispatchEvent({
|
|
type: 'slidetransitionend',
|
|
data: { indexh, indexv, previousSlide, currentSlide }
|
|
});
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* A global listener for all click events inside of the
|
|
* .slides container.
|
|
*
|
|
* @param {object} [event]
|
|
*/
|
|
function onSlidesClicked( event ) {
|
|
|
|
const anchor = Util.closest( event.target, 'a[href^="#"]' );
|
|
|
|
// If a hash link is clicked, we find the target slide
|
|
// and navigate to it. We previously relied on 'hashchange'
|
|
// for links like these but that prevented media with
|
|
// audio tracks from playing in mobile browsers since it
|
|
// wasn't considered a direct interaction with the document.
|
|
if( anchor ) {
|
|
const hash = anchor.getAttribute( 'href' );
|
|
const indices = location.getIndicesFromHash( hash );
|
|
|
|
if( indices ) {
|
|
Reveal.slide( indices.h, indices.v, indices.f );
|
|
event.preventDefault();
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* 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();
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* Handler for the document level 'fullscreenchange' event.
|
|
*
|
|
* @param {object} [event]
|
|
*/
|
|
function onFullscreenChange( event ) {
|
|
|
|
let element = document.fullscreenElement || document.webkitFullscreenElement;
|
|
if( element === dom.wrapper ) {
|
|
event.stopImmediatePropagation();
|
|
|
|
// Timeout to avoid layout shift in Safari
|
|
setTimeout( () => {
|
|
Reveal.layout();
|
|
Reveal.focus.focus(); // focus.focus :'(
|
|
}, 1 );
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* 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 --------------------------------//
|
|
// --------------------------------------------------------------------//
|
|
|
|
// The public reveal.js API
|
|
const API = {
|
|
VERSION,
|
|
|
|
initialize,
|
|
configure,
|
|
destroy,
|
|
|
|
sync,
|
|
syncSlide,
|
|
syncFragments: fragments.sync.bind( fragments ),
|
|
|
|
// Navigation methods
|
|
slide,
|
|
left: navigateLeft,
|
|
right: navigateRight,
|
|
up: navigateUp,
|
|
down: navigateDown,
|
|
prev: navigatePrev,
|
|
next: navigateNext,
|
|
|
|
// Navigation aliases
|
|
navigateLeft, navigateRight, navigateUp, navigateDown, navigatePrev, navigateNext,
|
|
|
|
// Fragment methods
|
|
navigateFragment: fragments.goto.bind( fragments ),
|
|
prevFragment: fragments.prev.bind( fragments ),
|
|
nextFragment: fragments.next.bind( fragments ),
|
|
|
|
// Event binding
|
|
on,
|
|
off,
|
|
|
|
// Legacy event binding methods left in for backwards compatibility
|
|
addEventListener: on,
|
|
removeEventListener: off,
|
|
|
|
// 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 scroll view on/off
|
|
toggleScrollView: scrollView.toggle.bind( scrollView ),
|
|
|
|
// Toggles the "black screen" mode on/off
|
|
togglePause,
|
|
|
|
// Toggles the auto slide mode on/off
|
|
toggleAutoSlide,
|
|
|
|
// Toggles visibility of the jump-to-slide UI
|
|
toggleJumpToSlide,
|
|
|
|
// Slide navigation checks
|
|
isFirstSlide,
|
|
isLastSlide,
|
|
isLastVerticalSlide,
|
|
isVerticalSlide,
|
|
isVerticalStack,
|
|
|
|
// State checks
|
|
isPaused,
|
|
isAutoSliding,
|
|
isSpeakerNotes: notes.isSpeakerNotesWindow.bind( notes ),
|
|
isOverview: overview.isActive.bind( overview ),
|
|
isFocused: focus.isFocused.bind( focus ),
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|
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isScrollView: scrollView.isActive.bind( scrollView ),
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isPrintView: printView.isActive.bind( printView ),
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|
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// Checks if reveal.js has been loaded and is ready for use
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isReady: () => ready,
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|
|
|
// Slide preloading
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|
loadSlide: slideContent.load.bind( slideContent ),
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unloadSlide: slideContent.unload.bind( slideContent ),
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|
|
|
// Start/stop all media inside of the current slide
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startEmbeddedContent: () => slideContent.startEmbeddedContent( currentSlide ),
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stopEmbeddedContent: () => slideContent.stopEmbeddedContent( currentSlide, { unloadIframes: false } ),
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|
|
|
// Preview management
|
|
showPreview,
|
|
hidePreview: closeOverlay,
|
|
|
|
// Adds or removes all internal event listeners
|
|
addEventListeners,
|
|
removeEventListeners,
|
|
dispatchEvent,
|
|
|
|
// Facility for persisting and restoring the presentation state
|
|
getState,
|
|
setState,
|
|
|
|
// Presentation progress on range of 0-1
|
|
getProgress,
|
|
|
|
// Returns the indices of the current, or specified, slide
|
|
getIndices,
|
|
|
|
// Returns an Array of key:value maps of the attributes of each
|
|
// slide in the deck
|
|
getSlidesAttributes,
|
|
|
|
// Returns the number of slides that we have passed
|
|
getSlidePastCount,
|
|
|
|
// Returns the total number of slides
|
|
getTotalSlides,
|
|
|
|
// Returns the slide element at the specified index
|
|
getSlide,
|
|
|
|
// Returns the previous slide element, may be null
|
|
getPreviousSlide: () => previousSlide,
|
|
|
|
// Returns the current slide element
|
|
getCurrentSlide: () => currentSlide,
|
|
|
|
// 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 of all slides
|
|
getSlides,
|
|
|
|
// Returns an array with all horizontal/vertical slides in the deck
|
|
getHorizontalSlides,
|
|
getVerticalSlides,
|
|
|
|
// Checks if the presentation contains two or more horizontal
|
|
// and vertical slides
|
|
hasHorizontalSlides,
|
|
hasVerticalSlides,
|
|
|
|
// Checks if the deck has navigated on either axis at least once
|
|
hasNavigatedHorizontally: () => navigationHistory.hasNavigatedHorizontally,
|
|
hasNavigatedVertically: () => navigationHistory.hasNavigatedVertically,
|
|
|
|
shouldAutoAnimateBetween,
|
|
|
|
// 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 ),
|
|
|
|
getComputedSlideSize,
|
|
setCurrentScrollPage,
|
|
|
|
// 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: Util.getQueryHash,
|
|
|
|
// Returns the path to the current slide as represented in the URL
|
|
getSlidePath: location.getHash.bind( location ),
|
|
|
|
// Returns reveal.js DOM elements
|
|
getRevealElement: () => revealElement,
|
|
getSlidesElement: () => dom.slides,
|
|
getViewportElement: () => dom.viewport,
|
|
getBackgroundsElement: () => backgrounds.element,
|
|
|
|
// 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 )
|
|
|
|
};
|
|
|
|
// Our internal API which controllers have access to
|
|
Util.extend( Reveal, {
|
|
...API,
|
|
|
|
// Methods for announcing content to screen readers
|
|
announceStatus,
|
|
getStatusText,
|
|
|
|
// Controllers
|
|
focus,
|
|
scroll: scrollView,
|
|
progress,
|
|
controls,
|
|
location,
|
|
overview,
|
|
fragments,
|
|
backgrounds,
|
|
slideContent,
|
|
slideNumber,
|
|
|
|
onUserInput,
|
|
closeOverlay,
|
|
updateSlidesVisibility,
|
|
layoutSlideContents,
|
|
transformSlides,
|
|
cueAutoSlide,
|
|
cancelAutoSlide
|
|
} );
|
|
|
|
return API;
|
|
|
|
};
|
|
|