5839 lines
160 KiB
JavaScript
5839 lines
160 KiB
JavaScript
import Playback from './components/playback.js'
|
||
import defaultConfig from './config.js'
|
||
import {
|
||
extend,
|
||
toArray,
|
||
distanceBetween,
|
||
deserialize,
|
||
transformElement,
|
||
injectStyleSheet,
|
||
loadScript,
|
||
closestParent,
|
||
colorToRgb,
|
||
colorBrightness,
|
||
enterFullscreen
|
||
} from './utils/util.js'
|
||
|
||
/**
|
||
* reveal.js
|
||
* http://revealjs.com
|
||
* MIT licensed
|
||
*
|
||
* Copyright (C) 2020 Hakim El Hattab, http://hakim.se
|
||
*/
|
||
export default function( revealElement, options ) {
|
||
|
||
let Reveal;
|
||
|
||
// The reveal.js version
|
||
const VERSION = '4.0.0-dev';
|
||
|
||
const SLIDES_SELECTOR = '.slides section';
|
||
const HORIZONTAL_SLIDES_SELECTOR = '.slides>section';
|
||
const VERTICAL_SLIDES_SELECTOR = '.slides>section.present>section';
|
||
const HOME_SLIDE_SELECTOR = '.slides>section:first-of-type';
|
||
|
||
const UA = navigator.userAgent;
|
||
|
||
// Methods that may not be invoked via the postMessage API
|
||
const POST_MESSAGE_METHOD_BLACKLIST = /registerPlugin|registerKeyboardShortcut|addKeyBinding|addEventListener/;
|
||
|
||
// Configuration defaults, can be overridden at initialization time
|
||
let config,
|
||
|
||
// Flags if reveal.js is loaded (has dispatched the 'ready' event)
|
||
loaded = false,
|
||
|
||
// Flags if the overview mode is currently active
|
||
overview = false,
|
||
|
||
// Holds the dimensions of our overview slides, including margins
|
||
overviewSlideWidth = null,
|
||
overviewSlideHeight = null,
|
||
|
||
// The horizontal and vertical index of the currently active slide
|
||
indexh,
|
||
indexv,
|
||
|
||
// The previous and current slide HTML elements
|
||
previousSlide,
|
||
currentSlide,
|
||
|
||
previousBackground,
|
||
|
||
// Remember which directions that the user has navigated towards
|
||
hasNavigatedHorizontally = false,
|
||
hasNavigatedVertically = false,
|
||
|
||
// Slides may hold a data-state attribute which we pick up and apply
|
||
// as a class to the body. This list contains the combined state of
|
||
// all current slides.
|
||
state = [],
|
||
|
||
// The current scale of the presentation (see width/height config)
|
||
scale = 1,
|
||
|
||
// CSS transform that is currently applied to the slides container,
|
||
// split into two groups
|
||
slidesTransform = { layout: '', overview: '' },
|
||
|
||
// Cached references to DOM elements
|
||
dom = {},
|
||
|
||
// A list of registered reveal.js plugins
|
||
plugins = {},
|
||
|
||
// List of asynchronously loaded reveal.js dependencies
|
||
asyncDependencies = [],
|
||
|
||
// Features supported by the browser, see #checkCapabilities()
|
||
features = {},
|
||
|
||
// Client is a mobile device, see #checkCapabilities()
|
||
isMobileDevice,
|
||
|
||
// Client is a desktop Chrome, see #checkCapabilities()
|
||
isChrome,
|
||
|
||
// Throttles mouse wheel navigation
|
||
lastMouseWheelStep = 0,
|
||
|
||
// Delays updates to the URL due to a Chrome thumbnailer bug
|
||
writeURLTimeout = 0,
|
||
|
||
// Is the mouse pointer currently hidden from view
|
||
cursorHidden = false,
|
||
|
||
// Timeout used to determine when the cursor is inactive
|
||
cursorInactiveTimeout = 0,
|
||
|
||
// Flags if the interaction event listeners are bound
|
||
eventsAreBound = false,
|
||
|
||
// <style> element used to apply auto-animations
|
||
autoAnimateStyleSheet,
|
||
|
||
// Counter used to generate unique IDs for auto-animated elements
|
||
autoAnimateCounter = 0,
|
||
|
||
// The current auto-slide duration
|
||
autoSlide = 0,
|
||
|
||
// Auto slide properties
|
||
autoSlidePlayer,
|
||
autoSlideTimeout = 0,
|
||
autoSlideStartTime = -1,
|
||
autoSlidePaused = false,
|
||
|
||
// Holds information about the currently ongoing touch input
|
||
touch = {
|
||
startX: 0,
|
||
startY: 0,
|
||
startCount: 0,
|
||
captured: false,
|
||
threshold: 40
|
||
},
|
||
|
||
// A key:value map of shortcut keyboard keys and descriptions of
|
||
// the actions they trigger, generated in #configure()
|
||
keyboardShortcuts = {},
|
||
|
||
// Holds custom key code mappings
|
||
registeredKeyBindings = {};
|
||
|
||
/**
|
||
* Starts up the presentation if the client is capable.
|
||
*/
|
||
function init() {
|
||
|
||
if( !revealElement ) {
|
||
console.warn( 'reveal.js must be instantiated with a valid .reveal element' );
|
||
return;
|
||
}
|
||
|
||
checkCapabilities();
|
||
|
||
// Cache references to key DOM elements
|
||
dom.wrapper = revealElement;
|
||
dom.slides = revealElement.querySelector( '.slides' );
|
||
|
||
// Force a layout when the whole page, incl fonts, has loaded
|
||
window.addEventListener( 'load', layout, false );
|
||
|
||
let query = Reveal.getQueryHash();
|
||
|
||
// Do not accept new dependencies via query config to avoid
|
||
// the potential of malicious script injection
|
||
if( typeof query['dependencies'] !== 'undefined' ) delete query['dependencies'];
|
||
|
||
// Copy options over to our config object
|
||
config = {...defaultConfig, ...options, ...query}
|
||
|
||
// Loads dependencies and continues to #start() once done
|
||
load();
|
||
|
||
return Reveal;
|
||
|
||
}
|
||
|
||
/**
|
||
* Inspect the client to see what it's capable of, this
|
||
* should only happens once per runtime.
|
||
*/
|
||
function checkCapabilities() {
|
||
|
||
isMobileDevice = /(iphone|ipod|ipad|android)/gi.test( UA ) ||
|
||
( navigator.platform === 'MacIntel' && navigator.maxTouchPoints > 1 ); // iPadOS
|
||
isChrome = /chrome/i.test( UA ) && !/edge/i.test( UA );
|
||
|
||
let testElement = document.createElement( 'div' );
|
||
|
||
// Flags if we should use zoom instead of transform to scale
|
||
// up slides. Zoom produces crisper results but has a lot of
|
||
// xbrowser quirks so we only use it in whitelsited browsers.
|
||
features.zoom = 'zoom' in testElement.style && !isMobileDevice &&
|
||
( isChrome || /Version\/[\d\.]+.*Safari/.test( UA ) );
|
||
|
||
}
|
||
|
||
/**
|
||
* Loads the dependencies of reveal.js. Dependencies are
|
||
* defined via the configuration option 'dependencies'
|
||
* and will be loaded prior to starting/binding reveal.js.
|
||
* Some dependencies may have an 'async' flag, if so they
|
||
* will load after reveal.js has been started up.
|
||
*/
|
||
function load() {
|
||
|
||
let scripts = [],
|
||
scriptsToLoad = 0;
|
||
|
||
config.dependencies.forEach( s => {
|
||
// Load if there's no condition or the condition is truthy
|
||
if( !s.condition || s.condition() ) {
|
||
if( s.async ) {
|
||
asyncDependencies.push( s );
|
||
}
|
||
else {
|
||
scripts.push( s );
|
||
}
|
||
}
|
||
} );
|
||
|
||
if( scripts.length ) {
|
||
scriptsToLoad = scripts.length;
|
||
|
||
// Load synchronous scripts
|
||
scripts.forEach( s => {
|
||
loadScript( s.src, () => {
|
||
|
||
if( typeof s.callback === 'function' ) s.callback();
|
||
|
||
if( --scriptsToLoad === 0 ) {
|
||
initPlugins();
|
||
}
|
||
|
||
} );
|
||
} );
|
||
}
|
||
else {
|
||
initPlugins();
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Initializes our plugins and waits for them to be ready
|
||
* before proceeding.
|
||
*/
|
||
function initPlugins() {
|
||
|
||
let pluginsToInitialize = Object.keys( plugins ).length;
|
||
|
||
// If there are no plugins, skip this step
|
||
if( pluginsToInitialize === 0 ) {
|
||
loadAsyncDependencies();
|
||
}
|
||
// ... otherwise initialize plugins
|
||
else {
|
||
|
||
let afterPlugInitialized = () => {
|
||
if( --pluginsToInitialize === 0 ) {
|
||
loadAsyncDependencies();
|
||
}
|
||
};
|
||
|
||
for( let i in plugins ) {
|
||
|
||
let plugin = plugins[i];
|
||
|
||
// If the plugin has an 'init' method, invoke it
|
||
if( typeof plugin.init === 'function' ) {
|
||
let callback = plugin.init();
|
||
|
||
// If the plugin returned a Promise, wait for it
|
||
if( callback && typeof callback.then === 'function' ) {
|
||
callback.then( afterPlugInitialized );
|
||
}
|
||
else {
|
||
afterPlugInitialized();
|
||
}
|
||
}
|
||
else {
|
||
afterPlugInitialized();
|
||
}
|
||
|
||
}
|
||
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Loads all async reveal.js dependencies.
|
||
*/
|
||
function loadAsyncDependencies() {
|
||
|
||
if( asyncDependencies.length ) {
|
||
asyncDependencies.forEach( s => {
|
||
loadScript( s.src, s.callback );
|
||
} );
|
||
}
|
||
|
||
start();
|
||
|
||
}
|
||
|
||
/**
|
||
* Starts up reveal.js by binding input events and navigating
|
||
* to the current URL deeplink if there is one.
|
||
*/
|
||
function start() {
|
||
|
||
loaded = true;
|
||
|
||
// Make sure we've got all the DOM elements we need
|
||
setupDOM();
|
||
|
||
// Listen to messages posted to this window
|
||
setupPostMessage();
|
||
|
||
// Prevent the slides from being scrolled out of view
|
||
setupScrollPrevention();
|
||
|
||
// Resets all vertical slides so that only the first is visible
|
||
resetVerticalSlides();
|
||
|
||
// Updates the presentation to match the current configuration values
|
||
configure();
|
||
|
||
// Read the initial hash
|
||
readURL();
|
||
|
||
// Update all backgrounds
|
||
updateBackground( true );
|
||
|
||
// Notify listeners that the presentation is ready but use a 1ms
|
||
// timeout to ensure it's not fired synchronously after #initialize()
|
||
setTimeout( () => {
|
||
// Enable transitions now that we're loaded
|
||
dom.slides.classList.remove( 'no-transition' );
|
||
|
||
dom.wrapper.classList.add( 'ready' );
|
||
|
||
dispatchEvent( 'ready', {
|
||
'indexh': indexh,
|
||
'indexv': indexv,
|
||
'currentSlide': currentSlide
|
||
} );
|
||
}, 1 );
|
||
|
||
// Special setup and config is required when printing to PDF
|
||
if( isPrintingPDF() ) {
|
||
removeEventListeners();
|
||
|
||
// The document needs to have loaded for the PDF layout
|
||
// measurements to be accurate
|
||
if( document.readyState === 'complete' ) {
|
||
setupPDF();
|
||
}
|
||
else {
|
||
window.addEventListener( 'load', setupPDF );
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Finds and stores references to DOM elements which are
|
||
* required by the presentation. If a required element is
|
||
* not found, it is created.
|
||
*/
|
||
function setupDOM() {
|
||
|
||
// Prevent transitions while we're loading
|
||
dom.slides.classList.add( 'no-transition' );
|
||
|
||
if( isMobileDevice ) {
|
||
dom.wrapper.classList.add( 'no-hover' );
|
||
}
|
||
else {
|
||
dom.wrapper.classList.remove( 'no-hover' );
|
||
}
|
||
|
||
if( /iphone/gi.test( UA ) ) {
|
||
dom.wrapper.classList.add( 'ua-iphone' );
|
||
}
|
||
else {
|
||
dom.wrapper.classList.remove( 'ua-iphone' );
|
||
}
|
||
|
||
// Background element
|
||
dom.background = createSingletonNode( dom.wrapper, 'div', 'backgrounds', null );
|
||
|
||
// Progress bar
|
||
dom.progress = createSingletonNode( dom.wrapper, 'div', 'progress', '<span></span>' );
|
||
dom.progressbar = dom.progress.querySelector( 'span' );
|
||
|
||
// Arrow controls
|
||
dom.controls = createSingletonNode( dom.wrapper, 'aside', 'controls',
|
||
`<button class="navigate-left" aria-label="${ config.rtl ? 'next slide' : 'previous slide' }"><div class="controls-arrow"></div></button>
|
||
<button class="navigate-right" aria-label="${ config.rtl ? 'previous slide' : 'next slide' }"><div class="controls-arrow"></div></button>
|
||
<button class="navigate-up" aria-label="above slide"><div class="controls-arrow"></div></button>
|
||
<button class="navigate-down" aria-label="below slide"><div class="controls-arrow"></div></button>` );
|
||
|
||
// Slide number
|
||
dom.slideNumber = createSingletonNode( dom.wrapper, 'div', 'slide-number', '' );
|
||
|
||
// Element containing notes that are visible to the audience
|
||
dom.speakerNotes = createSingletonNode( dom.wrapper, 'div', 'speaker-notes', null );
|
||
dom.speakerNotes.setAttribute( 'data-prevent-swipe', '' );
|
||
dom.speakerNotes.setAttribute( 'tabindex', '0' );
|
||
|
||
// Overlay graphic which is displayed during the paused mode
|
||
dom.pauseOverlay = createSingletonNode( dom.wrapper, 'div', 'pause-overlay', config.controls ? '<button class="resume-button">Resume presentation</button>' : null );
|
||
|
||
dom.wrapper.setAttribute( 'role', 'application' );
|
||
|
||
// There can be multiple instances of controls throughout the page
|
||
dom.controlsLeft = toArray( dom.wrapper.querySelectorAll( '.navigate-left' ) );
|
||
dom.controlsRight = toArray( dom.wrapper.querySelectorAll( '.navigate-right' ) );
|
||
dom.controlsUp = toArray( dom.wrapper.querySelectorAll( '.navigate-up' ) );
|
||
dom.controlsDown = toArray( dom.wrapper.querySelectorAll( '.navigate-down' ) );
|
||
dom.controlsPrev = toArray( dom.wrapper.querySelectorAll( '.navigate-prev' ) );
|
||
dom.controlsNext = toArray( dom.wrapper.querySelectorAll( '.navigate-next' ) );
|
||
|
||
// The left, right and down arrows in the standard reveal.js controls
|
||
dom.controlsRightArrow = dom.controls.querySelector( '.navigate-right' );
|
||
dom.controlsLeftArrow = dom.controls.querySelector( '.navigate-left' );
|
||
dom.controlsDownArrow = dom.controls.querySelector( '.navigate-down' );
|
||
|
||
dom.statusDiv = createStatusDiv();
|
||
}
|
||
|
||
/**
|
||
* Creates a hidden div with role aria-live to announce the
|
||
* current slide content. Hide the div off-screen to make it
|
||
* available only to Assistive Technologies.
|
||
*
|
||
* @return {HTMLElement}
|
||
*/
|
||
function createStatusDiv() {
|
||
|
||
let statusDiv = dom.wrapper.querySelector( '.aria-status' );
|
||
if( !statusDiv ) {
|
||
statusDiv = document.createElement( 'div' );
|
||
statusDiv.style.position = 'absolute';
|
||
statusDiv.style.height = '1px';
|
||
statusDiv.style.width = '1px';
|
||
statusDiv.style.overflow = 'hidden';
|
||
statusDiv.style.clip = 'rect( 1px, 1px, 1px, 1px )';
|
||
statusDiv.classList.add( 'aria-status' );
|
||
statusDiv.setAttribute( 'aria-live', 'polite' );
|
||
statusDiv.setAttribute( 'aria-atomic','true' );
|
||
dom.wrapper.appendChild( statusDiv );
|
||
}
|
||
return statusDiv;
|
||
|
||
}
|
||
|
||
/**
|
||
* Converts the given HTML element into a string of text
|
||
* that can be announced to a screen reader. Hidden
|
||
* elements are excluded.
|
||
*/
|
||
function getStatusText( node ) {
|
||
|
||
let text = '';
|
||
|
||
// Text node
|
||
if( node.nodeType === 3 ) {
|
||
text += node.textContent;
|
||
}
|
||
// Element node
|
||
else if( node.nodeType === 1 ) {
|
||
|
||
let isAriaHidden = node.getAttribute( 'aria-hidden' );
|
||
let isDisplayHidden = window.getComputedStyle( node )['display'] === 'none';
|
||
if( isAriaHidden !== 'true' && !isDisplayHidden ) {
|
||
|
||
toArray( node.childNodes ).forEach( child => {
|
||
text += getStatusText( child );
|
||
} );
|
||
|
||
}
|
||
|
||
}
|
||
|
||
text = text.trim();
|
||
|
||
return text === '' ? '' : text + ' ';
|
||
|
||
}
|
||
|
||
/**
|
||
* Configures the presentation for printing to a static
|
||
* PDF.
|
||
*/
|
||
function setupPDF() {
|
||
|
||
let slideSize = getComputedSlideSize( window.innerWidth, window.innerHeight );
|
||
|
||
// Dimensions of the PDF pages
|
||
let pageWidth = Math.floor( slideSize.width * ( 1 + config.margin ) ),
|
||
pageHeight = Math.floor( slideSize.height * ( 1 + config.margin ) );
|
||
|
||
// Dimensions of slides within the pages
|
||
let slideWidth = slideSize.width,
|
||
slideHeight = slideSize.height;
|
||
|
||
// Let the browser know what page size we want to print
|
||
injectStyleSheet( '@page{size:'+ pageWidth +'px '+ pageHeight +'px; margin: 0px;}' );
|
||
|
||
// Limit the size of certain elements to the dimensions of the slide
|
||
injectStyleSheet( '.reveal section>img, .reveal section>video, .reveal section>iframe{max-width: '+ slideWidth +'px; max-height:'+ slideHeight +'px}' );
|
||
|
||
document.body.classList.add( 'print-pdf' );
|
||
document.body.style.width = pageWidth + 'px';
|
||
document.body.style.height = pageHeight + 'px';
|
||
|
||
// Make sure stretch elements fit on slide
|
||
layoutSlideContents( slideWidth, slideHeight );
|
||
|
||
// Compute slide numbers now, before we start duplicating slides
|
||
let doingSlideNumbers = config.slideNumber && /all|print/i.test( config.showSlideNumber );
|
||
toArray( dom.wrapper.querySelectorAll( SLIDES_SELECTOR ) ).forEach( function( slide ) {
|
||
slide.setAttribute( 'data-slide-number', getSlideNumber( slide ) );
|
||
} );
|
||
|
||
// Slide and slide background layout
|
||
toArray( dom.wrapper.querySelectorAll( SLIDES_SELECTOR ) ).forEach( function( slide ) {
|
||
|
||
// Vertical stacks are not centred since their section
|
||
// children will be
|
||
if( slide.classList.contains( 'stack' ) === false ) {
|
||
// Center the slide inside of the page, giving the slide some margin
|
||
let left = ( pageWidth - slideWidth ) / 2,
|
||
top = ( pageHeight - slideHeight ) / 2;
|
||
|
||
let contentHeight = slide.scrollHeight;
|
||
let numberOfPages = Math.max( Math.ceil( contentHeight / pageHeight ), 1 );
|
||
|
||
// Adhere to configured pages per slide limit
|
||
numberOfPages = Math.min( numberOfPages, config.pdfMaxPagesPerSlide );
|
||
|
||
// Center slides vertically
|
||
if( numberOfPages === 1 && config.center || slide.classList.contains( 'center' ) ) {
|
||
top = Math.max( ( pageHeight - contentHeight ) / 2, 0 );
|
||
}
|
||
|
||
// Wrap the slide in a page element and hide its overflow
|
||
// so that no page ever flows onto another
|
||
let page = document.createElement( 'div' );
|
||
page.className = 'pdf-page';
|
||
page.style.height = ( ( pageHeight + config.pdfPageHeightOffset ) * numberOfPages ) + 'px';
|
||
slide.parentNode.insertBefore( page, slide );
|
||
page.appendChild( slide );
|
||
|
||
// Position the slide inside of the page
|
||
slide.style.left = left + 'px';
|
||
slide.style.top = top + 'px';
|
||
slide.style.width = slideWidth + 'px';
|
||
|
||
if( slide.slideBackgroundElement ) {
|
||
page.insertBefore( slide.slideBackgroundElement, slide );
|
||
}
|
||
|
||
// Inject notes if `showNotes` is enabled
|
||
if( config.showNotes ) {
|
||
|
||
// Are there notes for this slide?
|
||
let notes = getSlideNotes( slide );
|
||
if( notes ) {
|
||
|
||
let notesSpacing = 8;
|
||
let notesLayout = typeof config.showNotes === 'string' ? config.showNotes : 'inline';
|
||
let notesElement = document.createElement( 'div' );
|
||
notesElement.classList.add( 'speaker-notes' );
|
||
notesElement.classList.add( 'speaker-notes-pdf' );
|
||
notesElement.setAttribute( 'data-layout', notesLayout );
|
||
notesElement.innerHTML = notes;
|
||
|
||
if( notesLayout === 'separate-page' ) {
|
||
page.parentNode.insertBefore( notesElement, page.nextSibling );
|
||
}
|
||
else {
|
||
notesElement.style.left = notesSpacing + 'px';
|
||
notesElement.style.bottom = notesSpacing + 'px';
|
||
notesElement.style.width = ( pageWidth - notesSpacing*2 ) + 'px';
|
||
page.appendChild( notesElement );
|
||
}
|
||
|
||
}
|
||
|
||
}
|
||
|
||
// Inject slide numbers if `slideNumbers` are enabled
|
||
if( doingSlideNumbers ) {
|
||
let numberElement = document.createElement( 'div' );
|
||
numberElement.classList.add( 'slide-number' );
|
||
numberElement.classList.add( 'slide-number-pdf' );
|
||
numberElement.innerHTML = slide.getAttribute( 'data-slide-number' );
|
||
page.appendChild( numberElement );
|
||
}
|
||
|
||
// Copy page and show fragments one after another
|
||
if( config.pdfSeparateFragments ) {
|
||
|
||
// Each fragment 'group' is an array containing one or more
|
||
// fragments. Multiple fragments that appear at the same time
|
||
// are part of the same group.
|
||
let fragmentGroups = sortFragments( page.querySelectorAll( '.fragment' ), true );
|
||
|
||
let previousFragmentStep;
|
||
let previousPage;
|
||
|
||
fragmentGroups.forEach( function( fragments ) {
|
||
|
||
// Remove 'current-fragment' from the previous group
|
||
if( previousFragmentStep ) {
|
||
previousFragmentStep.forEach( function( fragment ) {
|
||
fragment.classList.remove( 'current-fragment' );
|
||
} );
|
||
}
|
||
|
||
// Show the fragments for the current index
|
||
fragments.forEach( function( fragment ) {
|
||
fragment.classList.add( 'visible', 'current-fragment' );
|
||
} );
|
||
|
||
// Create a separate page for the current fragment state
|
||
let clonedPage = page.cloneNode( true );
|
||
page.parentNode.insertBefore( clonedPage, ( previousPage || page ).nextSibling );
|
||
|
||
previousFragmentStep = fragments;
|
||
previousPage = clonedPage;
|
||
|
||
} );
|
||
|
||
// Reset the first/original page so that all fragments are hidden
|
||
fragmentGroups.forEach( function( fragments ) {
|
||
fragments.forEach( function( fragment ) {
|
||
fragment.classList.remove( 'visible', 'current-fragment' );
|
||
} );
|
||
} );
|
||
|
||
}
|
||
// Show all fragments
|
||
else {
|
||
toArray( page.querySelectorAll( '.fragment:not(.fade-out)' ) ).forEach( function( fragment ) {
|
||
fragment.classList.add( 'visible' );
|
||
} );
|
||
}
|
||
|
||
}
|
||
|
||
} );
|
||
|
||
// Notify subscribers that the PDF layout is good to go
|
||
dispatchEvent( 'pdf-ready' );
|
||
|
||
}
|
||
|
||
/**
|
||
* This is an unfortunate necessity. Some actions – such as
|
||
* an input field being focused in an iframe or using the
|
||
* keyboard to expand text selection beyond the bounds of
|
||
* a slide – can trigger our content to be pushed out of view.
|
||
* This scrolling can not be prevented by hiding overflow in
|
||
* CSS (we already do) so we have to resort to repeatedly
|
||
* checking if the slides have been offset :(
|
||
*/
|
||
function setupScrollPrevention() {
|
||
|
||
setInterval( () => {
|
||
if( dom.wrapper.scrollTop !== 0 || dom.wrapper.scrollLeft !== 0 ) {
|
||
dom.wrapper.scrollTop = 0;
|
||
dom.wrapper.scrollLeft = 0;
|
||
}
|
||
}, 1000 );
|
||
|
||
}
|
||
|
||
/**
|
||
* Creates an HTML element and returns a reference to it.
|
||
* If the element already exists the existing instance will
|
||
* be returned.
|
||
*
|
||
* @param {HTMLElement} container
|
||
* @param {string} tagname
|
||
* @param {string} classname
|
||
* @param {string} innerHTML
|
||
*
|
||
* @return {HTMLElement}
|
||
*/
|
||
function createSingletonNode( container, tagname, classname, innerHTML='' ) {
|
||
|
||
// Find all nodes matching the description
|
||
let nodes = container.querySelectorAll( '.' + classname );
|
||
|
||
// Check all matches to find one which is a direct child of
|
||
// the specified container
|
||
for( let i = 0; i < nodes.length; i++ ) {
|
||
let testNode = nodes[i];
|
||
if( testNode.parentNode === container ) {
|
||
return testNode;
|
||
}
|
||
}
|
||
|
||
// If no node was found, create it now
|
||
let node = document.createElement( tagname );
|
||
node.className = classname;
|
||
node.innerHTML = innerHTML;
|
||
container.appendChild( node );
|
||
|
||
return node;
|
||
|
||
}
|
||
|
||
/**
|
||
* Creates the slide background elements and appends them
|
||
* to the background container. One element is created per
|
||
* slide no matter if the given slide has visible background.
|
||
*/
|
||
function createBackgrounds() {
|
||
|
||
let printMode = isPrintingPDF();
|
||
|
||
// Clear prior backgrounds
|
||
dom.background.innerHTML = '';
|
||
dom.background.classList.add( 'no-transition' );
|
||
|
||
// Iterate over all horizontal slides
|
||
toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ).forEach( slideh => {
|
||
|
||
let backgroundStack = createBackground( slideh, dom.background );
|
||
|
||
// Iterate over all vertical slides
|
||
toArray( slideh.querySelectorAll( 'section' ) ).forEach( slidev => {
|
||
|
||
createBackground( slidev, backgroundStack );
|
||
|
||
backgroundStack.classList.add( 'stack' );
|
||
|
||
} );
|
||
|
||
} );
|
||
|
||
// Add parallax background if specified
|
||
if( config.parallaxBackgroundImage ) {
|
||
|
||
dom.background.style.backgroundImage = 'url("' + config.parallaxBackgroundImage + '")';
|
||
dom.background.style.backgroundSize = config.parallaxBackgroundSize;
|
||
dom.background.style.backgroundRepeat = config.parallaxBackgroundRepeat;
|
||
dom.background.style.backgroundPosition = config.parallaxBackgroundPosition;
|
||
|
||
// Make sure the below properties are set on the element - these properties are
|
||
// needed for proper transitions to be set on the element via CSS. To remove
|
||
// annoying background slide-in effect when the presentation starts, apply
|
||
// these properties after short time delay
|
||
setTimeout( () => {
|
||
dom.wrapper.classList.add( 'has-parallax-background' );
|
||
}, 1 );
|
||
|
||
}
|
||
else {
|
||
|
||
dom.background.style.backgroundImage = '';
|
||
dom.wrapper.classList.remove( 'has-parallax-background' );
|
||
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Creates a background for the given slide.
|
||
*
|
||
* @param {HTMLElement} slide
|
||
* @param {HTMLElement} container The element that the background
|
||
* should be appended to
|
||
* @return {HTMLElement} New background div
|
||
*/
|
||
function createBackground( slide, container ) {
|
||
|
||
// Main slide background element
|
||
let element = document.createElement( 'div' );
|
||
element.className = 'slide-background ' + slide.className.replace( /present|past|future/, '' );
|
||
|
||
// Inner background element that wraps images/videos/iframes
|
||
let contentElement = document.createElement( 'div' );
|
||
contentElement.className = 'slide-background-content';
|
||
|
||
element.appendChild( contentElement );
|
||
container.appendChild( element );
|
||
|
||
slide.slideBackgroundElement = element;
|
||
slide.slideBackgroundContentElement = contentElement;
|
||
|
||
// Syncs the background to reflect all current background settings
|
||
syncBackground( slide );
|
||
|
||
return element;
|
||
|
||
}
|
||
|
||
/**
|
||
* Renders all of the visual properties of a slide background
|
||
* based on the various background attributes.
|
||
*
|
||
* @param {HTMLElement} slide
|
||
*/
|
||
function syncBackground( slide ) {
|
||
|
||
let element = slide.slideBackgroundElement,
|
||
contentElement = slide.slideBackgroundContentElement;
|
||
|
||
// Reset the prior background state in case this is not the
|
||
// initial sync
|
||
slide.classList.remove( 'has-dark-background' );
|
||
slide.classList.remove( 'has-light-background' );
|
||
|
||
element.removeAttribute( 'data-loaded' );
|
||
element.removeAttribute( 'data-background-hash' );
|
||
element.removeAttribute( 'data-background-size' );
|
||
element.removeAttribute( 'data-background-transition' );
|
||
element.style.backgroundColor = '';
|
||
|
||
contentElement.style.backgroundSize = '';
|
||
contentElement.style.backgroundRepeat = '';
|
||
contentElement.style.backgroundPosition = '';
|
||
contentElement.style.backgroundImage = '';
|
||
contentElement.style.opacity = '';
|
||
contentElement.innerHTML = '';
|
||
|
||
let data = {
|
||
background: slide.getAttribute( 'data-background' ),
|
||
backgroundSize: slide.getAttribute( 'data-background-size' ),
|
||
backgroundImage: slide.getAttribute( 'data-background-image' ),
|
||
backgroundVideo: slide.getAttribute( 'data-background-video' ),
|
||
backgroundIframe: slide.getAttribute( 'data-background-iframe' ),
|
||
backgroundColor: slide.getAttribute( 'data-background-color' ),
|
||
backgroundRepeat: slide.getAttribute( 'data-background-repeat' ),
|
||
backgroundPosition: slide.getAttribute( 'data-background-position' ),
|
||
backgroundTransition: slide.getAttribute( 'data-background-transition' ),
|
||
backgroundOpacity: slide.getAttribute( 'data-background-opacity' )
|
||
};
|
||
|
||
if( data.background ) {
|
||
// Auto-wrap image urls in url(...)
|
||
if( /^(http|file|\/\/)/gi.test( data.background ) || /\.(svg|png|jpg|jpeg|gif|bmp)([?#\s]|$)/gi.test( data.background ) ) {
|
||
slide.setAttribute( 'data-background-image', data.background );
|
||
}
|
||
else {
|
||
element.style.background = data.background;
|
||
}
|
||
}
|
||
|
||
// Create a hash for this combination of background settings.
|
||
// This is used to determine when two slide backgrounds are
|
||
// the same.
|
||
if( data.background || data.backgroundColor || data.backgroundImage || data.backgroundVideo || data.backgroundIframe ) {
|
||
element.setAttribute( 'data-background-hash', data.background +
|
||
data.backgroundSize +
|
||
data.backgroundImage +
|
||
data.backgroundVideo +
|
||
data.backgroundIframe +
|
||
data.backgroundColor +
|
||
data.backgroundRepeat +
|
||
data.backgroundPosition +
|
||
data.backgroundTransition +
|
||
data.backgroundOpacity );
|
||
}
|
||
|
||
// Additional and optional background properties
|
||
if( data.backgroundSize ) element.setAttribute( 'data-background-size', data.backgroundSize );
|
||
if( data.backgroundColor ) element.style.backgroundColor = data.backgroundColor;
|
||
if( data.backgroundTransition ) element.setAttribute( 'data-background-transition', data.backgroundTransition );
|
||
|
||
if( slide.hasAttribute( 'data-preload' ) ) element.setAttribute( 'data-preload', '' );
|
||
|
||
// Background image options are set on the content wrapper
|
||
if( data.backgroundSize ) contentElement.style.backgroundSize = data.backgroundSize;
|
||
if( data.backgroundRepeat ) contentElement.style.backgroundRepeat = data.backgroundRepeat;
|
||
if( data.backgroundPosition ) contentElement.style.backgroundPosition = data.backgroundPosition;
|
||
if( data.backgroundOpacity ) contentElement.style.opacity = data.backgroundOpacity;
|
||
|
||
// If this slide has a background color, we add a class that
|
||
// signals if it is light or dark. If the slide has no background
|
||
// color, no class will be added
|
||
let contrastColor = data.backgroundColor;
|
||
|
||
// If no bg color was found, check the computed background
|
||
if( !contrastColor ) {
|
||
let computedBackgroundStyle = window.getComputedStyle( element );
|
||
if( computedBackgroundStyle && computedBackgroundStyle.backgroundColor ) {
|
||
contrastColor = computedBackgroundStyle.backgroundColor;
|
||
}
|
||
}
|
||
|
||
if( contrastColor ) {
|
||
let rgb = colorToRgb( contrastColor );
|
||
|
||
// Ignore fully transparent backgrounds. Some browsers return
|
||
// rgba(0,0,0,0) when reading the computed background color of
|
||
// an element with no background
|
||
if( rgb && rgb.a !== 0 ) {
|
||
if( colorBrightness( contrastColor ) < 128 ) {
|
||
slide.classList.add( 'has-dark-background' );
|
||
}
|
||
else {
|
||
slide.classList.add( 'has-light-background' );
|
||
}
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Registers a listener to postMessage events, this makes it
|
||
* possible to call all reveal.js API methods from another
|
||
* window. For example:
|
||
*
|
||
* revealWindow.postMessage( JSON.stringify({
|
||
* method: 'slide',
|
||
* args: [ 2 ]
|
||
* }), '*' );
|
||
*/
|
||
function setupPostMessage() {
|
||
|
||
if( config.postMessage ) {
|
||
window.addEventListener( 'message', event => {
|
||
const data = event.data;
|
||
|
||
// Make sure we're dealing with JSON
|
||
if( typeof data === 'string' && data.charAt( 0 ) === '{' && data.charAt( data.length - 1 ) === '}' ) {
|
||
data = JSON.parse( data );
|
||
|
||
// Check if the requested method can be found
|
||
if( data.method && typeof Reveal[data.method] === 'function' ) {
|
||
|
||
if( POST_MESSAGE_METHOD_BLACKLIST.test( data.method ) === false ) {
|
||
|
||
const result = Reveal[data.method].apply( Reveal, data.args );
|
||
|
||
// Dispatch a postMessage event with the returned value from
|
||
// our method invocation for getter functions
|
||
dispatchPostMessage( 'callback', { method: data.method, result: result } );
|
||
|
||
}
|
||
else {
|
||
console.warn( 'reveal.js: "'+ data.method +'" is is blacklisted from the postMessage API' );
|
||
}
|
||
|
||
}
|
||
}
|
||
}, false );
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Applies the configuration settings from the config
|
||
* object. May be called multiple times.
|
||
*
|
||
* @param {object} options
|
||
*/
|
||
function configure( options ) {
|
||
|
||
const oldTransition = config.transition;
|
||
|
||
// New config options may be passed when this method
|
||
// is invoked through the API after initialization
|
||
if( typeof options === 'object' ) extend( config, options );
|
||
|
||
// Abort if reveal.js hasn't finished loading, config
|
||
// changes will be applied automatically once loading
|
||
// finishes
|
||
if( loaded === false ) return;
|
||
|
||
const numberOfSlides = dom.wrapper.querySelectorAll( SLIDES_SELECTOR ).length;
|
||
|
||
// Remove the previously configured transition class
|
||
dom.wrapper.classList.remove( oldTransition );
|
||
|
||
dom.wrapper.classList.add( config.transition );
|
||
|
||
dom.wrapper.setAttribute( 'data-transition-speed', config.transitionSpeed );
|
||
dom.wrapper.setAttribute( 'data-background-transition', config.backgroundTransition );
|
||
|
||
dom.controls.style.display = config.controls ? 'block' : 'none';
|
||
dom.progress.style.display = config.progress ? 'block' : 'none';
|
||
|
||
dom.controls.setAttribute( 'data-controls-layout', config.controlsLayout );
|
||
dom.controls.setAttribute( 'data-controls-back-arrows', config.controlsBackArrows );
|
||
|
||
if( config.shuffle ) {
|
||
shuffle();
|
||
}
|
||
|
||
if( config.rtl ) {
|
||
dom.wrapper.classList.add( 'rtl' );
|
||
}
|
||
else {
|
||
dom.wrapper.classList.remove( 'rtl' );
|
||
}
|
||
|
||
if( config.center ) {
|
||
dom.wrapper.classList.add( 'center' );
|
||
}
|
||
else {
|
||
dom.wrapper.classList.remove( 'center' );
|
||
}
|
||
|
||
// Exit the paused mode if it was configured off
|
||
if( config.pause === false ) {
|
||
resume();
|
||
}
|
||
|
||
if( config.showNotes ) {
|
||
dom.speakerNotes.setAttribute( 'data-layout', typeof config.showNotes === 'string' ? config.showNotes : 'inline' );
|
||
}
|
||
|
||
if( config.mouseWheel ) {
|
||
document.addEventListener( 'DOMMouseScroll', onDocumentMouseScroll, false ); // FF
|
||
document.addEventListener( 'mousewheel', onDocumentMouseScroll, false );
|
||
}
|
||
else {
|
||
document.removeEventListener( 'DOMMouseScroll', onDocumentMouseScroll, false ); // FF
|
||
document.removeEventListener( 'mousewheel', onDocumentMouseScroll, false );
|
||
}
|
||
|
||
// Auto-hide the mouse pointer when its inactive
|
||
if( config.hideInactiveCursor ) {
|
||
document.addEventListener( 'mousemove', onDocumentCursorActive, false );
|
||
document.addEventListener( 'mousedown', onDocumentCursorActive, false );
|
||
}
|
||
else {
|
||
showCursor();
|
||
|
||
document.removeEventListener( 'mousemove', onDocumentCursorActive, false );
|
||
document.removeEventListener( 'mousedown', onDocumentCursorActive, false );
|
||
}
|
||
|
||
// Iframe link previews
|
||
if( config.previewLinks ) {
|
||
enablePreviewLinks();
|
||
disablePreviewLinks( '[data-preview-link=false]' );
|
||
}
|
||
else {
|
||
disablePreviewLinks();
|
||
enablePreviewLinks( '[data-preview-link]:not([data-preview-link=false])' );
|
||
}
|
||
|
||
// Reset all auto animated elements
|
||
toArray( dom.slides.querySelectorAll( '[data-auto-animate]:not([data-auto-animate=""])' ) ).forEach( element => {
|
||
element.dataset.autoAnimate = '';
|
||
} );
|
||
|
||
removeEphemeralAutoAnimateAttributes();
|
||
|
||
if( autoAnimateStyleSheet && autoAnimateStyleSheet.parentNode ) {
|
||
autoAnimateStyleSheet.parentNode.removeChild( autoAnimateStyleSheet );
|
||
autoAnimateStyleSheet = null;
|
||
}
|
||
|
||
// Remove existing auto-slide controls
|
||
if( autoSlidePlayer ) {
|
||
autoSlidePlayer.destroy();
|
||
autoSlidePlayer = null;
|
||
}
|
||
|
||
// Generate auto-slide controls if needed
|
||
if( numberOfSlides > 1 && config.autoSlide && config.autoSlideStoppable ) {
|
||
autoSlidePlayer = new Playback( dom.wrapper, () => {
|
||
return Math.min( Math.max( ( Date.now() - autoSlideStartTime ) / autoSlide, 0 ), 1 );
|
||
} );
|
||
|
||
autoSlidePlayer.on( 'click', onAutoSlidePlayerClick );
|
||
autoSlidePaused = false;
|
||
}
|
||
|
||
// When fragments are turned off they should be visible
|
||
if( config.fragments === false ) {
|
||
toArray( dom.slides.querySelectorAll( '.fragment' ) ).forEach( element => {
|
||
element.classList.add( 'visible' );
|
||
element.classList.remove( 'current-fragment' );
|
||
} );
|
||
}
|
||
|
||
// Slide numbers
|
||
let slideNumberDisplay = 'none';
|
||
if( config.slideNumber && !isPrintingPDF() ) {
|
||
if( config.showSlideNumber === 'all' ) {
|
||
slideNumberDisplay = 'block';
|
||
}
|
||
else if( config.showSlideNumber === 'speaker' && isSpeakerNotes() ) {
|
||
slideNumberDisplay = 'block';
|
||
}
|
||
}
|
||
|
||
dom.slideNumber.style.display = slideNumberDisplay;
|
||
|
||
// Add the navigation mode to the DOM so we can adjust styling
|
||
if( config.navigationMode !== 'default' ) {
|
||
dom.wrapper.setAttribute( 'data-navigation-mode', config.navigationMode );
|
||
}
|
||
else {
|
||
dom.wrapper.removeAttribute( 'data-navigation-mode' );
|
||
}
|
||
|
||
// Define our contextual list of keyboard shortcuts
|
||
if( config.navigationMode === 'linear' ) {
|
||
keyboardShortcuts['→ , ↓ , SPACE , N , L , J'] = 'Next slide';
|
||
keyboardShortcuts['← , ↑ , P , H , K'] = 'Previous slide';
|
||
}
|
||
else {
|
||
keyboardShortcuts['N , SPACE'] = 'Next slide';
|
||
keyboardShortcuts['P'] = 'Previous slide';
|
||
keyboardShortcuts['← , H'] = 'Navigate left';
|
||
keyboardShortcuts['→ , L'] = 'Navigate right';
|
||
keyboardShortcuts['↑ , K'] = 'Navigate up';
|
||
keyboardShortcuts['↓ , J'] = 'Navigate down';
|
||
}
|
||
|
||
keyboardShortcuts['Home , Shift ←'] = 'First slide';
|
||
keyboardShortcuts['End , Shift →'] = 'Last slide';
|
||
keyboardShortcuts['B , .'] = 'Pause';
|
||
keyboardShortcuts['F'] = 'Fullscreen';
|
||
keyboardShortcuts['ESC, O'] = 'Slide overview';
|
||
|
||
sync();
|
||
|
||
}
|
||
|
||
/**
|
||
* Binds all event listeners.
|
||
*/
|
||
function addEventListeners() {
|
||
|
||
eventsAreBound = true;
|
||
|
||
window.addEventListener( 'hashchange', onWindowHashChange, false );
|
||
window.addEventListener( 'resize', onWindowResize, false );
|
||
|
||
if( config.touch ) {
|
||
if( 'onpointerdown' in window ) {
|
||
// Use W3C pointer events
|
||
dom.wrapper.addEventListener( 'pointerdown', onPointerDown, false );
|
||
dom.wrapper.addEventListener( 'pointermove', onPointerMove, false );
|
||
dom.wrapper.addEventListener( 'pointerup', onPointerUp, false );
|
||
}
|
||
else if( window.navigator.msPointerEnabled ) {
|
||
// IE 10 uses prefixed version of pointer events
|
||
dom.wrapper.addEventListener( 'MSPointerDown', onPointerDown, false );
|
||
dom.wrapper.addEventListener( 'MSPointerMove', onPointerMove, false );
|
||
dom.wrapper.addEventListener( 'MSPointerUp', onPointerUp, false );
|
||
}
|
||
else {
|
||
// Fall back to touch events
|
||
dom.wrapper.addEventListener( 'touchstart', onTouchStart, false );
|
||
dom.wrapper.addEventListener( 'touchmove', onTouchMove, false );
|
||
dom.wrapper.addEventListener( 'touchend', onTouchEnd, false );
|
||
}
|
||
}
|
||
|
||
if( config.keyboard ) {
|
||
document.addEventListener( 'keydown', onDocumentKeyDown, false );
|
||
document.addEventListener( 'keypress', onDocumentKeyPress, false );
|
||
}
|
||
|
||
if( config.progress && dom.progress ) {
|
||
dom.progress.addEventListener( 'click', onProgressClicked, false );
|
||
}
|
||
|
||
dom.pauseOverlay.addEventListener( 'click', resume, false );
|
||
|
||
if( config.focusBodyOnPageVisibilityChange ) {
|
||
document.addEventListener( 'visibilitychange', onPageVisibilityChange, false );
|
||
}
|
||
|
||
// Listen to both touch and click events, in case the device
|
||
// supports both
|
||
let pointerEvents = [ 'touchstart', 'click' ];
|
||
|
||
// Only support touch for Android, fixes double navigations in
|
||
// stock browser
|
||
if( UA.match( /android/gi ) ) {
|
||
pointerEvents = [ 'touchstart' ];
|
||
}
|
||
|
||
pointerEvents.forEach( eventName => {
|
||
dom.controlsLeft.forEach( el => el.addEventListener( eventName, onNavigateLeftClicked, false ) );
|
||
dom.controlsRight.forEach( el => el.addEventListener( eventName, onNavigateRightClicked, false ) );
|
||
dom.controlsUp.forEach( el => el.addEventListener( eventName, onNavigateUpClicked, false ) );
|
||
dom.controlsDown.forEach( el => el.addEventListener( eventName, onNavigateDownClicked, false ) );
|
||
dom.controlsPrev.forEach( el => el.addEventListener( eventName, onNavigatePrevClicked, false ) );
|
||
dom.controlsNext.forEach( el => el.addEventListener( eventName, onNavigateNextClicked, false ) );
|
||
} );
|
||
|
||
}
|
||
|
||
/**
|
||
* Unbinds all event listeners.
|
||
*/
|
||
function removeEventListeners() {
|
||
|
||
eventsAreBound = false;
|
||
|
||
document.removeEventListener( 'keydown', onDocumentKeyDown, false );
|
||
document.removeEventListener( 'keypress', onDocumentKeyPress, false );
|
||
window.removeEventListener( 'hashchange', onWindowHashChange, false );
|
||
window.removeEventListener( 'resize', onWindowResize, false );
|
||
|
||
dom.wrapper.removeEventListener( 'pointerdown', onPointerDown, false );
|
||
dom.wrapper.removeEventListener( 'pointermove', onPointerMove, false );
|
||
dom.wrapper.removeEventListener( 'pointerup', onPointerUp, false );
|
||
|
||
dom.wrapper.removeEventListener( 'MSPointerDown', onPointerDown, false );
|
||
dom.wrapper.removeEventListener( 'MSPointerMove', onPointerMove, false );
|
||
dom.wrapper.removeEventListener( 'MSPointerUp', onPointerUp, false );
|
||
|
||
dom.wrapper.removeEventListener( 'touchstart', onTouchStart, false );
|
||
dom.wrapper.removeEventListener( 'touchmove', onTouchMove, false );
|
||
dom.wrapper.removeEventListener( 'touchend', onTouchEnd, false );
|
||
|
||
dom.pauseOverlay.removeEventListener( 'click', resume, false );
|
||
|
||
if ( config.progress && dom.progress ) {
|
||
dom.progress.removeEventListener( 'click', onProgressClicked, false );
|
||
}
|
||
|
||
[ 'touchstart', 'click' ].forEach( eventName => {
|
||
dom.controlsLeft.forEach( el => el.removeEventListener( eventName, onNavigateLeftClicked, false ) );
|
||
dom.controlsRight.forEach( el => el.removeEventListener( eventName, onNavigateRightClicked, false ) );
|
||
dom.controlsUp.forEach( el => el.removeEventListener( eventName, onNavigateUpClicked, false ) );
|
||
dom.controlsDown.forEach( el => el.removeEventListener( eventName, onNavigateDownClicked, false ) );
|
||
dom.controlsPrev.forEach( el => el.removeEventListener( eventName, onNavigatePrevClicked, false ) );
|
||
dom.controlsNext.forEach( el => el.removeEventListener( eventName, onNavigateNextClicked, false ) );
|
||
} );
|
||
|
||
}
|
||
|
||
/**
|
||
* Registers a new plugin with this reveal.js instance.
|
||
*
|
||
* reveal.js waits for all regisered plugins to initialize
|
||
* before considering itself ready, as long as the plugin
|
||
* is registered before calling `Reveal.initialize()`.
|
||
*/
|
||
function registerPlugin( id, plugin ) {
|
||
|
||
if( plugins[id] === undefined ) {
|
||
plugins[id] = plugin;
|
||
|
||
// If a plugin is registered after reveal.js is loaded,
|
||
// initialize it right away
|
||
if( loaded && typeof plugin.init === 'function' ) {
|
||
plugin.init();
|
||
}
|
||
}
|
||
else {
|
||
console.warn( 'reveal.js: "'+ id +'" plugin has already been registered' );
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Checks if a specific plugin has been registered.
|
||
*
|
||
* @param {String} id Unique plugin identifier
|
||
*/
|
||
function hasPlugin( id ) {
|
||
|
||
return !!plugins[id];
|
||
|
||
}
|
||
|
||
/**
|
||
* Returns the specific plugin instance, if a plugin
|
||
* with the given ID has been registered.
|
||
*
|
||
* @param {String} id Unique plugin identifier
|
||
*/
|
||
function getPlugin( id ) {
|
||
|
||
return plugins[id];
|
||
|
||
}
|
||
|
||
/**
|
||
* Add a custom key binding with optional description to
|
||
* be added to the help screen.
|
||
*/
|
||
function addKeyBinding( binding, callback ) {
|
||
|
||
if( typeof binding === 'object' && binding.keyCode ) {
|
||
registeredKeyBindings[binding.keyCode] = {
|
||
callback: callback,
|
||
key: binding.key,
|
||
description: binding.description
|
||
};
|
||
}
|
||
else {
|
||
registeredKeyBindings[binding] = {
|
||
callback: callback,
|
||
key: null,
|
||
description: null
|
||
};
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Removes the specified custom key binding.
|
||
*/
|
||
function removeKeyBinding( keyCode ) {
|
||
|
||
delete registeredKeyBindings[keyCode];
|
||
|
||
}
|
||
|
||
/**
|
||
* Applies CSS transforms to the slides container. The container
|
||
* is transformed from two separate sources: layout and the overview
|
||
* mode.
|
||
*
|
||
* @param {object} transforms
|
||
*/
|
||
function transformSlides( transforms ) {
|
||
|
||
// Pick up new transforms from arguments
|
||
if( typeof transforms.layout === 'string' ) slidesTransform.layout = transforms.layout;
|
||
if( typeof transforms.overview === 'string' ) slidesTransform.overview = transforms.overview;
|
||
|
||
// Apply the transforms to the slides container
|
||
if( slidesTransform.layout ) {
|
||
transformElement( dom.slides, slidesTransform.layout + ' ' + slidesTransform.overview );
|
||
}
|
||
else {
|
||
transformElement( dom.slides, slidesTransform.overview );
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Returns the remaining height within the parent of the
|
||
* target element.
|
||
*
|
||
* remaining height = [ configured parent height ] - [ current parent height ]
|
||
*
|
||
* @param {HTMLElement} element
|
||
* @param {number} [height]
|
||
*/
|
||
function getRemainingHeight( element, height = 0 ) {
|
||
|
||
if( element ) {
|
||
let newHeight, oldHeight = element.style.height;
|
||
|
||
// Change the .stretch element height to 0 in order find the height of all
|
||
// the other elements
|
||
element.style.height = '0px';
|
||
|
||
// In Overview mode, the parent (.slide) height is set of 700px.
|
||
// Restore it temporarily to its natural height.
|
||
element.parentNode.style.height = 'auto';
|
||
|
||
newHeight = height - element.parentNode.offsetHeight;
|
||
|
||
// Restore the old height, just in case
|
||
element.style.height = oldHeight + 'px';
|
||
|
||
// Clear the parent (.slide) height. .removeProperty works in IE9+
|
||
element.parentNode.style.removeProperty('height');
|
||
|
||
return newHeight;
|
||
}
|
||
|
||
return height;
|
||
|
||
}
|
||
|
||
/**
|
||
* Checks if this instance is being used to print a PDF.
|
||
*/
|
||
function isPrintingPDF() {
|
||
|
||
return ( /print-pdf/gi ).test( window.location.search );
|
||
|
||
}
|
||
|
||
/**
|
||
* Dispatches an event of the specified type from the
|
||
* reveal DOM element.
|
||
*/
|
||
function dispatchEvent( type, args ) {
|
||
|
||
let event = document.createEvent( 'HTMLEvents', 1, 2 );
|
||
event.initEvent( type, true, true );
|
||
extend( event, args );
|
||
dom.wrapper.dispatchEvent( event );
|
||
|
||
// If we're in an iframe, post each reveal.js event to the
|
||
// parent window. Used by the notes plugin
|
||
dispatchPostMessage( type );
|
||
|
||
}
|
||
|
||
/**
|
||
* Dispatched a postMessage of the given type from our window.
|
||
*/
|
||
function dispatchPostMessage( type, data ) {
|
||
|
||
if( config.postMessageEvents && window.parent !== window.self ) {
|
||
let message = {
|
||
namespace: 'reveal',
|
||
eventName: type,
|
||
state: getState()
|
||
};
|
||
|
||
extend( message, data );
|
||
|
||
window.parent.postMessage( JSON.stringify( message ), '*' );
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Bind preview frame links.
|
||
*
|
||
* @param {string} [selector=a] - selector for anchors
|
||
*/
|
||
function enablePreviewLinks( selector = 'a' ) {
|
||
|
||
toArray( dom.wrapper.querySelectorAll( selector ) ).forEach( element => {
|
||
if( /^(http|www)/gi.test( element.getAttribute( 'href' ) ) ) {
|
||
element.addEventListener( 'click', onPreviewLinkClicked, false );
|
||
}
|
||
} );
|
||
|
||
}
|
||
|
||
/**
|
||
* Unbind preview frame links.
|
||
*/
|
||
function disablePreviewLinks( selector = 'a' ) {
|
||
|
||
toArray( dom.wrapper.querySelectorAll( selector ) ).forEach( element => {
|
||
if( /^(http|www)/gi.test( element.getAttribute( 'href' ) ) ) {
|
||
element.removeEventListener( 'click', onPreviewLinkClicked, false );
|
||
}
|
||
} );
|
||
|
||
}
|
||
|
||
/**
|
||
* Opens a preview window for the target URL.
|
||
*
|
||
* @param {string} url - url for preview iframe src
|
||
*/
|
||
function showPreview( url ) {
|
||
|
||
closeOverlay();
|
||
|
||
dom.overlay = document.createElement( 'div' );
|
||
dom.overlay.classList.add( 'overlay' );
|
||
dom.overlay.classList.add( 'overlay-preview' );
|
||
dom.wrapper.appendChild( dom.overlay );
|
||
|
||
dom.overlay.innerHTML =
|
||
`<header>
|
||
<a class="close" href="#"><span class="icon"></span></a>
|
||
<a class="external" href="${url}" target="_blank"><span class="icon"></span></a>
|
||
</header>
|
||
<div class="spinner"></div>
|
||
<div class="viewport">
|
||
<iframe src="${url}"></iframe>
|
||
<small class="viewport-inner">
|
||
<span class="x-frame-error">Unable to load iframe. This is likely due to the site's policy (x-frame-options).</span>
|
||
</small>
|
||
</div>`;
|
||
|
||
dom.overlay.querySelector( 'iframe' ).addEventListener( 'load', event => {
|
||
dom.overlay.classList.add( 'loaded' );
|
||
}, false );
|
||
|
||
dom.overlay.querySelector( '.close' ).addEventListener( 'click', event => {
|
||
closeOverlay();
|
||
event.preventDefault();
|
||
}, false );
|
||
|
||
dom.overlay.querySelector( '.external' ).addEventListener( 'click', event => {
|
||
closeOverlay();
|
||
}, false );
|
||
|
||
}
|
||
|
||
/**
|
||
* Open or close help overlay window.
|
||
*
|
||
* @param {Boolean} [override] Flag which overrides the
|
||
* toggle logic and forcibly sets the desired state. True means
|
||
* help is open, false means it's closed.
|
||
*/
|
||
function toggleHelp( override ){
|
||
|
||
if( typeof override === 'boolean' ) {
|
||
override ? showHelp() : closeOverlay();
|
||
}
|
||
else {
|
||
if( dom.overlay ) {
|
||
closeOverlay();
|
||
}
|
||
else {
|
||
showHelp();
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Opens an overlay window with help material.
|
||
*/
|
||
function showHelp() {
|
||
|
||
if( config.help ) {
|
||
|
||
closeOverlay();
|
||
|
||
dom.overlay = document.createElement( 'div' );
|
||
dom.overlay.classList.add( 'overlay' );
|
||
dom.overlay.classList.add( 'overlay-help' );
|
||
dom.wrapper.appendChild( dom.overlay );
|
||
|
||
let html = '<p class="title">Keyboard Shortcuts</p><br/>';
|
||
|
||
html += '<table><th>KEY</th><th>ACTION</th>';
|
||
for( let key in keyboardShortcuts ) {
|
||
html += `<tr><td>${key}</td><td>${keyboardShortcuts[ key ]}</td></tr>`;
|
||
}
|
||
|
||
// Add custom key bindings that have associated descriptions
|
||
for( let binding in registeredKeyBindings ) {
|
||
if( registeredKeyBindings[binding].key && registeredKeyBindings[binding].description ) {
|
||
html += `<tr><td>${registeredKeyBindings[binding].key}</td><td>${registeredKeyBindings[binding].description}</td></tr>`;
|
||
}
|
||
}
|
||
|
||
html += '</table>';
|
||
|
||
dom.overlay.innerHTML = `
|
||
<header>
|
||
<a class="close" href="#"><span class="icon"></span></a>
|
||
</header>
|
||
<div class="viewport">
|
||
<div class="viewport-inner">${html}</div>
|
||
</div>
|
||
`;
|
||
|
||
dom.overlay.querySelector( '.close' ).addEventListener( 'click', event => {
|
||
closeOverlay();
|
||
event.preventDefault();
|
||
}, false );
|
||
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Closes any currently open overlay.
|
||
*/
|
||
function closeOverlay() {
|
||
|
||
if( dom.overlay ) {
|
||
dom.overlay.parentNode.removeChild( dom.overlay );
|
||
dom.overlay = null;
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Applies JavaScript-controlled layout rules to the
|
||
* presentation.
|
||
*/
|
||
function layout() {
|
||
|
||
if( dom.wrapper && !isPrintingPDF() ) {
|
||
|
||
if( !config.disableLayout ) {
|
||
|
||
// On some mobile devices '100vh' is taller than the visible
|
||
// viewport which leads to part of the presentation being
|
||
// cut off. To work around this we define our own '--vh' custom
|
||
// property where 100x adds up to the correct height.
|
||
//
|
||
// https://css-tricks.com/the-trick-to-viewport-units-on-mobile/
|
||
if( isMobileDevice ) {
|
||
document.documentElement.style.setProperty( '--vh', ( window.innerHeight * 0.01 ) + 'px' );
|
||
}
|
||
|
||
const size = getComputedSlideSize();
|
||
|
||
const oldScale = scale;
|
||
|
||
// Layout the contents of the slides
|
||
layoutSlideContents( config.width, config.height );
|
||
|
||
dom.slides.style.width = size.width + 'px';
|
||
dom.slides.style.height = size.height + 'px';
|
||
|
||
// Determine scale of content to fit within available space
|
||
scale = Math.min( size.presentationWidth / size.width, size.presentationHeight / size.height );
|
||
|
||
// Respect max/min scale settings
|
||
scale = Math.max( scale, config.minScale );
|
||
scale = Math.min( scale, config.maxScale );
|
||
|
||
// Don't apply any scaling styles if scale is 1
|
||
if( scale === 1 ) {
|
||
dom.slides.style.zoom = '';
|
||
dom.slides.style.left = '';
|
||
dom.slides.style.top = '';
|
||
dom.slides.style.bottom = '';
|
||
dom.slides.style.right = '';
|
||
transformSlides( { layout: '' } );
|
||
}
|
||
else {
|
||
// Zoom Scaling
|
||
// Content remains crisp no matter how much we scale. Side
|
||
// effects are minor differences in text layout and iframe
|
||
// viewports changing size. A 200x200 iframe viewport in a
|
||
// 2x zoomed presentation ends up having a 400x400 viewport.
|
||
if( scale > 1 && features.zoom && window.devicePixelRatio < 2 ) {
|
||
dom.slides.style.zoom = scale;
|
||
dom.slides.style.left = '';
|
||
dom.slides.style.top = '';
|
||
dom.slides.style.bottom = '';
|
||
dom.slides.style.right = '';
|
||
transformSlides( { layout: '' } );
|
||
}
|
||
// Transform Scaling
|
||
// Content layout remains the exact same when scaled up.
|
||
// Side effect is content becoming blurred, especially with
|
||
// high scale values on ldpi screens.
|
||
else {
|
||
dom.slides.style.zoom = '';
|
||
dom.slides.style.left = '50%';
|
||
dom.slides.style.top = '50%';
|
||
dom.slides.style.bottom = 'auto';
|
||
dom.slides.style.right = 'auto';
|
||
transformSlides( { layout: 'translate(-50%, -50%) scale('+ scale +')' } );
|
||
}
|
||
}
|
||
|
||
// Select all slides, vertical and horizontal
|
||
const slides = toArray( dom.wrapper.querySelectorAll( SLIDES_SELECTOR ) );
|
||
|
||
for( let i = 0, len = slides.length; i < len; i++ ) {
|
||
const slide = slides[ i ];
|
||
|
||
// Don't bother updating invisible slides
|
||
if( slide.style.display === 'none' ) {
|
||
continue;
|
||
}
|
||
|
||
if( config.center || slide.classList.contains( 'center' ) ) {
|
||
// Vertical stacks are not centred since their section
|
||
// children will be
|
||
if( slide.classList.contains( 'stack' ) ) {
|
||
slide.style.top = 0;
|
||
}
|
||
else {
|
||
slide.style.top = Math.max( ( size.height - slide.scrollHeight ) / 2, 0 ) + 'px';
|
||
}
|
||
}
|
||
else {
|
||
slide.style.top = '';
|
||
}
|
||
|
||
}
|
||
|
||
if( oldScale !== scale ) {
|
||
dispatchEvent( 'resize', {
|
||
'oldScale': oldScale,
|
||
'scale': scale,
|
||
'size': size
|
||
} );
|
||
}
|
||
}
|
||
|
||
updateProgress();
|
||
updateParallax();
|
||
|
||
if( isOverview() ) {
|
||
updateOverview();
|
||
}
|
||
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Applies layout logic to the contents of all slides in
|
||
* the presentation.
|
||
*
|
||
* @param {string|number} width
|
||
* @param {string|number} height
|
||
*/
|
||
function layoutSlideContents( width, height ) {
|
||
|
||
// Handle sizing of elements with the 'stretch' class
|
||
toArray( dom.slides.querySelectorAll( 'section > .stretch' ) ).forEach( element => {
|
||
|
||
// Determine how much vertical space we can use
|
||
let remainingHeight = getRemainingHeight( element, height );
|
||
|
||
// Consider the aspect ratio of media elements
|
||
if( /(img|video)/gi.test( element.nodeName ) ) {
|
||
const nw = element.naturalWidth || element.videoWidth,
|
||
nh = element.naturalHeight || element.videoHeight;
|
||
|
||
const es = Math.min( width / nw, remainingHeight / nh );
|
||
|
||
element.style.width = ( nw * es ) + 'px';
|
||
element.style.height = ( nh * es ) + 'px';
|
||
|
||
}
|
||
else {
|
||
element.style.width = width + 'px';
|
||
element.style.height = remainingHeight + 'px';
|
||
}
|
||
|
||
} );
|
||
|
||
}
|
||
|
||
/**
|
||
* Calculates the computed pixel size of our slides. These
|
||
* values are based on the width and height configuration
|
||
* options.
|
||
*
|
||
* @param {number} [presentationWidth=dom.wrapper.offsetWidth]
|
||
* @param {number} [presentationHeight=dom.wrapper.offsetHeight]
|
||
*/
|
||
function getComputedSlideSize( presentationWidth, presentationHeight ) {
|
||
|
||
const size = {
|
||
// Slide size
|
||
width: config.width,
|
||
height: config.height,
|
||
|
||
// Presentation size
|
||
presentationWidth: presentationWidth || dom.wrapper.offsetWidth,
|
||
presentationHeight: presentationHeight || dom.wrapper.offsetHeight
|
||
};
|
||
|
||
// Reduce available space by margin
|
||
size.presentationWidth -= ( size.presentationWidth * config.margin );
|
||
size.presentationHeight -= ( size.presentationHeight * config.margin );
|
||
|
||
// Slide width may be a percentage of available width
|
||
if( typeof size.width === 'string' && /%$/.test( size.width ) ) {
|
||
size.width = parseInt( size.width, 10 ) / 100 * size.presentationWidth;
|
||
}
|
||
|
||
// Slide height may be a percentage of available height
|
||
if( typeof size.height === 'string' && /%$/.test( size.height ) ) {
|
||
size.height = parseInt( size.height, 10 ) / 100 * size.presentationHeight;
|
||
}
|
||
|
||
return size;
|
||
|
||
}
|
||
|
||
/**
|
||
* Stores the vertical index of a stack so that the same
|
||
* vertical slide can be selected when navigating to and
|
||
* from the stack.
|
||
*
|
||
* @param {HTMLElement} stack The vertical stack element
|
||
* @param {string|number} [v=0] Index to memorize
|
||
*/
|
||
function setPreviousVerticalIndex( stack, v ) {
|
||
|
||
if( typeof stack === 'object' && typeof stack.setAttribute === 'function' ) {
|
||
stack.setAttribute( 'data-previous-indexv', v || 0 );
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Retrieves the vertical index which was stored using
|
||
* #setPreviousVerticalIndex() or 0 if no previous index
|
||
* exists.
|
||
*
|
||
* @param {HTMLElement} stack The vertical stack element
|
||
*/
|
||
function getPreviousVerticalIndex( stack ) {
|
||
|
||
if( typeof stack === 'object' && typeof stack.setAttribute === 'function' && stack.classList.contains( 'stack' ) ) {
|
||
// Prefer manually defined start-indexv
|
||
const attributeName = stack.hasAttribute( 'data-start-indexv' ) ? 'data-start-indexv' : 'data-previous-indexv';
|
||
|
||
return parseInt( stack.getAttribute( attributeName ) || 0, 10 );
|
||
}
|
||
|
||
return 0;
|
||
|
||
}
|
||
|
||
/**
|
||
* Displays the overview of slides (quick nav) by scaling
|
||
* down and arranging all slide elements.
|
||
*/
|
||
function activateOverview() {
|
||
|
||
// Only proceed if enabled in config
|
||
if( config.overview && !isOverview() ) {
|
||
|
||
overview = true;
|
||
|
||
dom.wrapper.classList.add( 'overview' );
|
||
|
||
// Don't auto-slide while in overview mode
|
||
cancelAutoSlide();
|
||
|
||
// Move the backgrounds element into the slide container to
|
||
// that the same scaling is applied
|
||
dom.slides.appendChild( dom.background );
|
||
|
||
// Clicking on an overview slide navigates to it
|
||
toArray( dom.wrapper.querySelectorAll( SLIDES_SELECTOR ) ).forEach( slide => {
|
||
if( !slide.classList.contains( 'stack' ) ) {
|
||
slide.addEventListener( 'click', onOverviewSlideClicked, true );
|
||
}
|
||
} );
|
||
|
||
// Calculate slide sizes
|
||
const margin = 70;
|
||
const slideSize = getComputedSlideSize();
|
||
overviewSlideWidth = slideSize.width + margin;
|
||
overviewSlideHeight = slideSize.height + margin;
|
||
|
||
// Reverse in RTL mode
|
||
if( config.rtl ) {
|
||
overviewSlideWidth = -overviewSlideWidth;
|
||
}
|
||
|
||
updateSlidesVisibility();
|
||
layoutOverview();
|
||
updateOverview();
|
||
|
||
layout();
|
||
|
||
// Notify observers of the overview showing
|
||
dispatchEvent( 'overviewshown', {
|
||
'indexh': indexh,
|
||
'indexv': indexv,
|
||
'currentSlide': currentSlide
|
||
} );
|
||
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Uses CSS transforms to position all slides in a grid for
|
||
* display inside of the overview mode.
|
||
*/
|
||
function layoutOverview() {
|
||
|
||
// Layout slides
|
||
toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ).forEach( ( hslide, h ) => {
|
||
hslide.setAttribute( 'data-index-h', h );
|
||
transformElement( hslide, 'translate3d(' + ( h * overviewSlideWidth ) + 'px, 0, 0)' );
|
||
|
||
if( hslide.classList.contains( 'stack' ) ) {
|
||
|
||
toArray( hslide.querySelectorAll( 'section' ) ).forEach( ( vslide, v ) => {
|
||
vslide.setAttribute( 'data-index-h', h );
|
||
vslide.setAttribute( 'data-index-v', v );
|
||
|
||
transformElement( vslide, 'translate3d(0, ' + ( v * overviewSlideHeight ) + 'px, 0)' );
|
||
} );
|
||
|
||
}
|
||
} );
|
||
|
||
// Layout slide backgrounds
|
||
toArray( dom.background.childNodes ).forEach( ( hbackground, h ) => {
|
||
transformElement( hbackground, 'translate3d(' + ( h * overviewSlideWidth ) + 'px, 0, 0)' );
|
||
|
||
toArray( hbackground.querySelectorAll( '.slide-background' ) ).forEach( ( vbackground, v ) => {
|
||
transformElement( vbackground, 'translate3d(0, ' + ( v * overviewSlideHeight ) + 'px, 0)' );
|
||
} );
|
||
} );
|
||
|
||
}
|
||
|
||
/**
|
||
* Moves the overview viewport to the current slides.
|
||
* Called each time the current slide changes.
|
||
*/
|
||
function updateOverview() {
|
||
|
||
const vmin = Math.min( window.innerWidth, window.innerHeight );
|
||
const scale = Math.max( vmin / 5, 150 ) / vmin;
|
||
|
||
transformSlides( {
|
||
overview: [
|
||
'scale('+ scale +')',
|
||
'translateX('+ ( -indexh * overviewSlideWidth ) +'px)',
|
||
'translateY('+ ( -indexv * overviewSlideHeight ) +'px)'
|
||
].join( ' ' )
|
||
} );
|
||
|
||
}
|
||
|
||
/**
|
||
* Exits the slide overview and enters the currently
|
||
* active slide.
|
||
*/
|
||
function deactivateOverview() {
|
||
|
||
// Only proceed if enabled in config
|
||
if( config.overview ) {
|
||
|
||
overview = false;
|
||
|
||
dom.wrapper.classList.remove( 'overview' );
|
||
|
||
// Temporarily add a class so that transitions can do different things
|
||
// depending on whether they are exiting/entering overview, or just
|
||
// moving from slide to slide
|
||
dom.wrapper.classList.add( 'overview-deactivating' );
|
||
|
||
setTimeout( () => {
|
||
dom.wrapper.classList.remove( 'overview-deactivating' );
|
||
}, 1 );
|
||
|
||
// Move the background element back out
|
||
dom.wrapper.appendChild( dom.background );
|
||
|
||
// Clean up changes made to slides
|
||
toArray( dom.wrapper.querySelectorAll( SLIDES_SELECTOR ) ).forEach( slide => {
|
||
transformElement( slide, '' );
|
||
|
||
slide.removeEventListener( 'click', onOverviewSlideClicked, true );
|
||
} );
|
||
|
||
// Clean up changes made to backgrounds
|
||
toArray( dom.background.querySelectorAll( '.slide-background' ) ).forEach( background => {
|
||
transformElement( background, '' );
|
||
} );
|
||
|
||
transformSlides( { overview: '' } );
|
||
|
||
slide( indexh, indexv );
|
||
|
||
layout();
|
||
|
||
cueAutoSlide();
|
||
|
||
// Notify observers of the overview hiding
|
||
dispatchEvent( 'overviewhidden', {
|
||
'indexh': indexh,
|
||
'indexv': indexv,
|
||
'currentSlide': currentSlide
|
||
} );
|
||
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Toggles the slide overview mode on and off.
|
||
*
|
||
* @param {Boolean} [override] Flag which overrides the
|
||
* toggle logic and forcibly sets the desired state. True means
|
||
* overview is open, false means it's closed.
|
||
*/
|
||
function toggleOverview( override ) {
|
||
|
||
if( typeof override === 'boolean' ) {
|
||
override ? activateOverview() : deactivateOverview();
|
||
}
|
||
else {
|
||
isOverview() ? deactivateOverview() : activateOverview();
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Checks if the overview is currently active.
|
||
*
|
||
* @return {Boolean} true if the overview is active,
|
||
* false otherwise
|
||
*/
|
||
function isOverview() {
|
||
|
||
return overview;
|
||
|
||
}
|
||
|
||
/**
|
||
* Return a hash URL that will resolve to the given slide location.
|
||
*
|
||
* @param {HTMLElement} [slide=currentSlide] The slide to link to
|
||
*/
|
||
function locationHash( slide ) {
|
||
|
||
let url = '/';
|
||
|
||
// Attempt to create a named link based on the slide's ID
|
||
let s = slide || currentSlide;
|
||
let id = s ? s.getAttribute( 'id' ) : null;
|
||
if( id ) {
|
||
id = encodeURIComponent( id );
|
||
}
|
||
|
||
let index = getIndices( slide );
|
||
if( !config.fragmentInURL ) {
|
||
index.f = undefined;
|
||
}
|
||
|
||
// If the current slide has an ID, use that as a named link,
|
||
// but we don't support named links with a fragment index
|
||
if( typeof id === 'string' && id.length && index.f === undefined ) {
|
||
url = '/' + id;
|
||
}
|
||
// Otherwise use the /h/v index
|
||
else {
|
||
let hashIndexBase = config.hashOneBasedIndex ? 1 : 0;
|
||
if( index.h > 0 || index.v > 0 || index.f !== undefined ) url += index.h + hashIndexBase;
|
||
if( index.v > 0 || index.f !== undefined ) url += '/' + (index.v + hashIndexBase );
|
||
if( index.f !== undefined ) url += '/' + index.f;
|
||
}
|
||
|
||
return url;
|
||
|
||
}
|
||
|
||
/**
|
||
* 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 );
|
||
|
||
}
|
||
|
||
/**
|
||
* Shows the mouse pointer after it has been hidden with
|
||
* #hideCursor.
|
||
*/
|
||
function showCursor() {
|
||
|
||
if( cursorHidden ) {
|
||
cursorHidden = false;
|
||
dom.wrapper.style.cursor = '';
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Hides the mouse pointer when it's on top of the .reveal
|
||
* container.
|
||
*/
|
||
function hideCursor() {
|
||
|
||
if( cursorHidden === false ) {
|
||
cursorHidden = true;
|
||
dom.wrapper.style.cursor = 'none';
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Enters the paused mode which fades everything on screen to
|
||
* black.
|
||
*/
|
||
function pause() {
|
||
|
||
if( config.pause ) {
|
||
const wasPaused = dom.wrapper.classList.contains( 'paused' );
|
||
|
||
cancelAutoSlide();
|
||
dom.wrapper.classList.add( 'paused' );
|
||
|
||
if( wasPaused === false ) {
|
||
dispatchEvent( 'paused' );
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Exits from the paused mode.
|
||
*/
|
||
function resume() {
|
||
|
||
const wasPaused = dom.wrapper.classList.contains( 'paused' );
|
||
dom.wrapper.classList.remove( 'paused' );
|
||
|
||
cueAutoSlide();
|
||
|
||
if( wasPaused ) {
|
||
dispatchEvent( 'resumed' );
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Toggles the paused mode on and off.
|
||
*/
|
||
function togglePause( override ) {
|
||
|
||
if( typeof override === 'boolean' ) {
|
||
override ? pause() : resume();
|
||
}
|
||
else {
|
||
isPaused() ? resume() : pause();
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Checks if we are currently in the paused mode.
|
||
*
|
||
* @return {Boolean}
|
||
*/
|
||
function isPaused() {
|
||
|
||
return dom.wrapper.classList.contains( 'paused' );
|
||
|
||
}
|
||
|
||
/**
|
||
* Toggles the auto slide mode on and off.
|
||
*
|
||
* @param {Boolean} [override] Flag which sets the desired state.
|
||
* True means autoplay starts, false means it stops.
|
||
*/
|
||
|
||
function toggleAutoSlide( override ) {
|
||
|
||
if( typeof override === 'boolean' ) {
|
||
override ? resumeAutoSlide() : pauseAutoSlide();
|
||
}
|
||
|
||
else {
|
||
autoSlidePaused ? resumeAutoSlide() : pauseAutoSlide();
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Checks if the auto slide mode is currently on.
|
||
*
|
||
* @return {Boolean}
|
||
*/
|
||
function isAutoSliding() {
|
||
|
||
return !!( autoSlide && !autoSlidePaused );
|
||
|
||
}
|
||
|
||
/**
|
||
* Steps from the current point in the presentation to the
|
||
* slide which matches the specified horizontal and vertical
|
||
* indices.
|
||
*
|
||
* @param {number} [h=indexh] Horizontal index of the target slide
|
||
* @param {number} [v=indexv] Vertical index of the target slide
|
||
* @param {number} [f] Index of a fragment within the
|
||
* target slide to activate
|
||
* @param {number} [o] Origin for use in multimaster environments
|
||
*/
|
||
function slide( h, v, f, o ) {
|
||
|
||
// Remember where we were at before
|
||
previousSlide = currentSlide;
|
||
|
||
// Query all horizontal slides in the deck
|
||
const horizontalSlides = dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR );
|
||
|
||
// Abort if there are no slides
|
||
if( horizontalSlides.length === 0 ) return;
|
||
|
||
// If no vertical index is specified and the upcoming slide is a
|
||
// stack, resume at its previous vertical index
|
||
if( v === undefined && !isOverview() ) {
|
||
v = getPreviousVerticalIndex( horizontalSlides[ h ] );
|
||
}
|
||
|
||
// If we were on a vertical stack, remember what vertical index
|
||
// it was on so we can resume at the same position when returning
|
||
if( previousSlide && previousSlide.parentNode && previousSlide.parentNode.classList.contains( 'stack' ) ) {
|
||
setPreviousVerticalIndex( previousSlide.parentNode, indexv );
|
||
}
|
||
|
||
// Remember the state before this slide
|
||
const stateBefore = state.concat();
|
||
|
||
// Reset the state array
|
||
state.length = 0;
|
||
|
||
let indexhBefore = indexh || 0,
|
||
indexvBefore = indexv || 0;
|
||
|
||
// Activate and transition to the new slide
|
||
indexh = updateSlides( HORIZONTAL_SLIDES_SELECTOR, h === undefined ? indexh : h );
|
||
indexv = updateSlides( VERTICAL_SLIDES_SELECTOR, v === undefined ? indexv : v );
|
||
|
||
// Update the visibility of slides now that the indices have changed
|
||
updateSlidesVisibility();
|
||
|
||
layout();
|
||
|
||
// Update the overview if it's currently active
|
||
if( isOverview() ) {
|
||
updateOverview();
|
||
}
|
||
|
||
// Find the current horizontal slide and any possible vertical slides
|
||
// within it
|
||
let currentHorizontalSlide = horizontalSlides[ indexh ],
|
||
currentVerticalSlides = currentHorizontalSlide.querySelectorAll( 'section' );
|
||
|
||
// Store references to the previous and current slides
|
||
currentSlide = currentVerticalSlides[ indexv ] || currentHorizontalSlide;
|
||
|
||
// Show fragment, if specified
|
||
if( typeof f !== 'undefined' ) {
|
||
navigateFragment( f );
|
||
}
|
||
|
||
// Dispatch an event if the slide changed
|
||
let slideChanged = ( indexh !== indexhBefore || indexv !== indexvBefore );
|
||
if (!slideChanged) {
|
||
// Ensure that the previous slide is never the same as the current
|
||
previousSlide = null;
|
||
}
|
||
|
||
// Solves an edge case where the previous slide maintains the
|
||
// 'present' class when navigating between adjacent vertical
|
||
// stacks
|
||
if( previousSlide && previousSlide !== currentSlide ) {
|
||
previousSlide.classList.remove( 'present' );
|
||
previousSlide.setAttribute( 'aria-hidden', 'true' );
|
||
|
||
// Reset all slides upon navigate to home
|
||
if( Reveal.isFirstSlide() ) {
|
||
// Launch async task
|
||
setTimeout( () => {
|
||
getVerticalStacks().forEach( slide => {
|
||
setPreviousVerticalIndex( slide, 0 );
|
||
} );
|
||
}, 0 );
|
||
}
|
||
}
|
||
|
||
// Apply the new state
|
||
stateLoop: for( let i = 0, len = state.length; i < len; i++ ) {
|
||
// Check if this state existed on the previous slide. If it
|
||
// did, we will avoid adding it repeatedly
|
||
for( let j = 0; j < stateBefore.length; j++ ) {
|
||
if( stateBefore[j] === state[i] ) {
|
||
stateBefore.splice( j, 1 );
|
||
continue stateLoop;
|
||
}
|
||
}
|
||
|
||
document.documentElement.classList.add( state[i] );
|
||
|
||
// Dispatch custom event matching the state's name
|
||
dispatchEvent( state[i] );
|
||
}
|
||
|
||
// Clean up the remains of the previous state
|
||
while( stateBefore.length ) {
|
||
document.documentElement.classList.remove( stateBefore.pop() );
|
||
}
|
||
|
||
if( slideChanged ) {
|
||
dispatchEvent( 'slidechanged', {
|
||
'indexh': indexh,
|
||
'indexv': indexv,
|
||
'previousSlide': previousSlide,
|
||
'currentSlide': currentSlide,
|
||
'origin': o
|
||
} );
|
||
}
|
||
|
||
// Handle embedded content
|
||
if( slideChanged || !previousSlide ) {
|
||
stopEmbeddedContent( previousSlide );
|
||
startEmbeddedContent( currentSlide );
|
||
}
|
||
|
||
// Announce the current slide contents, for screen readers
|
||
dom.statusDiv.textContent = getStatusText( currentSlide );
|
||
|
||
updateControls();
|
||
updateProgress();
|
||
updateBackground();
|
||
updateParallax();
|
||
updateSlideNumber();
|
||
updateNotes();
|
||
updateFragments();
|
||
|
||
// Update the URL hash
|
||
writeURL();
|
||
|
||
cueAutoSlide();
|
||
|
||
// Auto-animation
|
||
if( slideChanged && previousSlide && currentSlide && !isOverview() ) {
|
||
|
||
// Skip the slide transition between our two slides
|
||
// when auto-animating individual elements
|
||
if( previousSlide.hasAttribute( 'data-auto-animate' ) && currentSlide.hasAttribute( 'data-auto-animate' ) ) {
|
||
dom.slides.classList.add( 'disable-slide-transitions' );
|
||
|
||
setTimeout( () => {
|
||
dom.slides.classList.remove( 'disable-slide-transitions' );
|
||
}, 0 );
|
||
|
||
if( config.autoAnimate ) {
|
||
// Run the auto-animation between our slides
|
||
autoAnimate( previousSlide, currentSlide );
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Syncs the presentation with the current DOM. Useful
|
||
* when new slides or control elements are added or when
|
||
* the configuration has changed.
|
||
*/
|
||
function sync() {
|
||
|
||
// Subscribe to input
|
||
removeEventListeners();
|
||
addEventListeners();
|
||
|
||
// Force a layout to make sure the current config is accounted for
|
||
layout();
|
||
|
||
// Reflect the current autoSlide value
|
||
autoSlide = config.autoSlide;
|
||
|
||
// Start auto-sliding if it's enabled
|
||
cueAutoSlide();
|
||
|
||
// Re-create the slide backgrounds
|
||
createBackgrounds();
|
||
|
||
// Write the current hash to the URL
|
||
writeURL();
|
||
|
||
sortAllFragments();
|
||
|
||
updateControls();
|
||
updateProgress();
|
||
updateSlideNumber();
|
||
updateSlidesVisibility();
|
||
updateBackground( true );
|
||
updateNotesVisibility();
|
||
updateNotes();
|
||
|
||
formatEmbeddedContent();
|
||
|
||
// Start or stop embedded content depending on global config
|
||
if( config.autoPlayMedia === false ) {
|
||
stopEmbeddedContent( currentSlide, { unloadIframes: false } );
|
||
}
|
||
else {
|
||
startEmbeddedContent( currentSlide );
|
||
}
|
||
|
||
if( isOverview() ) {
|
||
layoutOverview();
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* 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 ) {
|
||
|
||
syncBackground( slide );
|
||
syncFragments( slide );
|
||
|
||
loadSlide( slide );
|
||
|
||
updateBackground();
|
||
updateNotes();
|
||
|
||
}
|
||
|
||
/**
|
||
* Formats the fragments on the given slide so that they have
|
||
* valid indices. Call this if fragments are changed in the DOM
|
||
* after reveal.js has already initialized.
|
||
*
|
||
* @param {HTMLElement} slide
|
||
* @return {Array} a list of the HTML fragments that were synced
|
||
*/
|
||
function syncFragments( slide = currentSlide ) {
|
||
|
||
return sortFragments( slide.querySelectorAll( '.fragment' ) );
|
||
|
||
}
|
||
|
||
/**
|
||
* Resets all vertical slides so that only the first
|
||
* is visible.
|
||
*/
|
||
function resetVerticalSlides() {
|
||
|
||
getHorizontalSlides().forEach( horizontalSlide => {
|
||
|
||
toArray( horizontalSlide.querySelectorAll( 'section' ) ).forEach( ( verticalSlide, y ) => {
|
||
|
||
if( y > 0 ) {
|
||
verticalSlide.classList.remove( 'present' );
|
||
verticalSlide.classList.remove( 'past' );
|
||
verticalSlide.classList.add( 'future' );
|
||
verticalSlide.setAttribute( 'aria-hidden', 'true' );
|
||
}
|
||
|
||
} );
|
||
|
||
} );
|
||
|
||
}
|
||
|
||
/**
|
||
* Sorts and formats all of fragments in the
|
||
* presentation.
|
||
*/
|
||
function sortAllFragments() {
|
||
|
||
getHorizontalSlides().forEach( horizontalSlide => {
|
||
|
||
let verticalSlides = toArray( horizontalSlide.querySelectorAll( 'section' ) );
|
||
verticalSlides.forEach( ( verticalSlide, y ) => {
|
||
|
||
sortFragments( verticalSlide.querySelectorAll( '.fragment' ) );
|
||
|
||
} );
|
||
|
||
if( verticalSlides.length === 0 ) sortFragments( horizontalSlide.querySelectorAll( '.fragment' ) );
|
||
|
||
} );
|
||
|
||
}
|
||
|
||
/**
|
||
* Randomly shuffles all slides in the deck.
|
||
*/
|
||
function shuffle() {
|
||
|
||
getHorizontalSlides().forEach( ( slide, i, slides ) => {
|
||
|
||
// Insert this slide next to another random slide. This may
|
||
// cause the slide to insert before itself but that's fine.
|
||
dom.slides.insertBefore( slide, slides[ Math.floor( Math.random() * slides.length ) ] );
|
||
|
||
} );
|
||
|
||
}
|
||
|
||
/**
|
||
* Updates one dimension of slides by showing the slide
|
||
* with the specified index.
|
||
*
|
||
* @param {string} selector A CSS selector that will fetch
|
||
* the group of slides we are working with
|
||
* @param {number} index The index of the slide that should be
|
||
* shown
|
||
*
|
||
* @return {number} The index of the slide that is now shown,
|
||
* might differ from the passed in index if it was out of
|
||
* bounds.
|
||
*/
|
||
function updateSlides( selector, index ) {
|
||
|
||
// Select all slides and convert the NodeList result to
|
||
// an array
|
||
let slides = toArray( dom.wrapper.querySelectorAll( selector ) ),
|
||
slidesLength = slides.length;
|
||
|
||
let printMode = isPrintingPDF();
|
||
|
||
if( slidesLength ) {
|
||
|
||
// Should the index loop?
|
||
if( config.loop ) {
|
||
index %= slidesLength;
|
||
|
||
if( index < 0 ) {
|
||
index = slidesLength + index;
|
||
}
|
||
}
|
||
|
||
// Enforce max and minimum index bounds
|
||
index = Math.max( Math.min( index, slidesLength - 1 ), 0 );
|
||
|
||
for( let i = 0; i < slidesLength; i++ ) {
|
||
let element = slides[i];
|
||
|
||
let reverse = config.rtl && !isVerticalSlide( element );
|
||
|
||
element.classList.remove( 'past', 'present', 'future' );
|
||
|
||
// http://www.w3.org/html/wg/drafts/html/master/editing.html#the-hidden-attribute
|
||
element.setAttribute( 'hidden', '' );
|
||
element.setAttribute( 'aria-hidden', 'true' );
|
||
|
||
// If this element contains vertical slides
|
||
if( element.querySelector( 'section' ) ) {
|
||
element.classList.add( 'stack' );
|
||
}
|
||
|
||
// If we're printing static slides, all slides are "present"
|
||
if( printMode ) {
|
||
element.classList.add( 'present' );
|
||
continue;
|
||
}
|
||
|
||
if( i < index ) {
|
||
// Any element previous to index is given the 'past' class
|
||
element.classList.add( reverse ? 'future' : 'past' );
|
||
|
||
if( config.fragments ) {
|
||
// Show all fragments in prior slides
|
||
toArray( element.querySelectorAll( '.fragment' ) ).forEach( fragment => {
|
||
fragment.classList.add( 'visible' );
|
||
fragment.classList.remove( 'current-fragment' );
|
||
} );
|
||
}
|
||
}
|
||
else if( i > index ) {
|
||
// Any element subsequent to index is given the 'future' class
|
||
element.classList.add( reverse ? 'past' : 'future' );
|
||
|
||
if( config.fragments ) {
|
||
// Hide all fragments in future slides
|
||
toArray( element.querySelectorAll( '.fragment.visible' ) ).forEach( fragment => {
|
||
fragment.classList.remove( 'visible', 'current-fragment' );
|
||
} );
|
||
}
|
||
}
|
||
}
|
||
|
||
// Mark the current slide as present
|
||
slides[index].classList.add( 'present' );
|
||
slides[index].removeAttribute( 'hidden' );
|
||
slides[index].removeAttribute( 'aria-hidden' );
|
||
|
||
// If this slide has a state associated with it, add it
|
||
// onto the current state of the deck
|
||
let slideState = slides[index].getAttribute( 'data-state' );
|
||
if( slideState ) {
|
||
state = state.concat( slideState.split( ' ' ) );
|
||
}
|
||
|
||
}
|
||
else {
|
||
// Since there are no slides we can't be anywhere beyond the
|
||
// zeroth index
|
||
index = 0;
|
||
}
|
||
|
||
return index;
|
||
|
||
}
|
||
|
||
/**
|
||
* Optimization method; hide all slides that are far away
|
||
* from the present slide.
|
||
*/
|
||
function updateSlidesVisibility() {
|
||
|
||
// Select all slides and convert the NodeList result to
|
||
// an array
|
||
let horizontalSlides = getHorizontalSlides(),
|
||
horizontalSlidesLength = horizontalSlides.length,
|
||
distanceX,
|
||
distanceY;
|
||
|
||
if( horizontalSlidesLength && typeof indexh !== 'undefined' ) {
|
||
|
||
// The number of steps away from the present slide that will
|
||
// be visible
|
||
let viewDistance = isOverview() ? 10 : config.viewDistance;
|
||
|
||
// Shorten the view distance on devices that typically have
|
||
// less resources
|
||
if( isMobileDevice ) {
|
||
viewDistance = isOverview() ? 6 : config.mobileViewDistance;
|
||
}
|
||
|
||
// All slides need to be visible when exporting to PDF
|
||
if( isPrintingPDF() ) {
|
||
viewDistance = Number.MAX_VALUE;
|
||
}
|
||
|
||
for( let x = 0; x < horizontalSlidesLength; x++ ) {
|
||
let horizontalSlide = horizontalSlides[x];
|
||
|
||
let verticalSlides = toArray( horizontalSlide.querySelectorAll( 'section' ) ),
|
||
verticalSlidesLength = verticalSlides.length;
|
||
|
||
// Determine how far away this slide is from the present
|
||
distanceX = Math.abs( ( indexh || 0 ) - x ) || 0;
|
||
|
||
// If the presentation is looped, distance should measure
|
||
// 1 between the first and last slides
|
||
if( config.loop ) {
|
||
distanceX = Math.abs( ( ( indexh || 0 ) - x ) % ( horizontalSlidesLength - viewDistance ) ) || 0;
|
||
}
|
||
|
||
// Show the horizontal slide if it's within the view distance
|
||
if( distanceX < viewDistance ) {
|
||
loadSlide( horizontalSlide );
|
||
}
|
||
else {
|
||
unloadSlide( 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 ) {
|
||
loadSlide( verticalSlide );
|
||
}
|
||
else {
|
||
unloadSlide( 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' );
|
||
}
|
||
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Pick up notes from the current slide and display them
|
||
* to the viewer.
|
||
*
|
||
* @see {@link config.showNotes}
|
||
*/
|
||
function updateNotes() {
|
||
|
||
if( config.showNotes && dom.speakerNotes && currentSlide && !isPrintingPDF() ) {
|
||
|
||
dom.speakerNotes.innerHTML = getSlideNotes() || '<span class="notes-placeholder">No notes on this slide.</span>';
|
||
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Updates the visibility of the speaker notes sidebar that
|
||
* is used to share annotated slides. The notes sidebar is
|
||
* only visible if showNotes is true and there are notes on
|
||
* one or more slides in the deck.
|
||
*/
|
||
function updateNotesVisibility() {
|
||
|
||
if( config.showNotes && hasNotes() ) {
|
||
dom.wrapper.classList.add( 'show-notes' );
|
||
}
|
||
else {
|
||
dom.wrapper.classList.remove( 'show-notes' );
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Checks if there are speaker notes for ANY slide in the
|
||
* presentation.
|
||
*/
|
||
function hasNotes() {
|
||
|
||
return dom.slides.querySelectorAll( '[data-notes], aside.notes' ).length > 0;
|
||
|
||
}
|
||
|
||
/**
|
||
* Updates the progress bar to reflect the current slide.
|
||
*/
|
||
function updateProgress() {
|
||
|
||
// Update progress if enabled
|
||
if( config.progress && dom.progressbar ) {
|
||
|
||
dom.progressbar.style.width = getProgress() * dom.wrapper.offsetWidth + 'px';
|
||
|
||
}
|
||
|
||
}
|
||
|
||
|
||
/**
|
||
* Updates the slide number to match the current slide.
|
||
*/
|
||
function updateSlideNumber() {
|
||
|
||
// Update slide number if enabled
|
||
if( config.slideNumber && dom.slideNumber ) {
|
||
dom.slideNumber.innerHTML = getSlideNumber();
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Returns the HTML string corresponding to the current slide number,
|
||
* including formatting.
|
||
*/
|
||
function getSlideNumber( slide = currentSlide ) {
|
||
|
||
let value;
|
||
let format = 'h.v';
|
||
|
||
if ( typeof config.slideNumber === 'function' ) {
|
||
value = config.slideNumber( slide );
|
||
} else {
|
||
// Check if a custom number format is available
|
||
if( typeof config.slideNumber === 'string' ) {
|
||
format = config.slideNumber;
|
||
}
|
||
|
||
// If there are ONLY vertical slides in this deck, always use
|
||
// a flattened slide number
|
||
if( !/c/.test( format ) && dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ).length === 1 ) {
|
||
format = 'c';
|
||
}
|
||
|
||
value = [];
|
||
switch( format ) {
|
||
case 'c':
|
||
value.push( getSlidePastCount( slide ) + 1 );
|
||
break;
|
||
case 'c/t':
|
||
value.push( getSlidePastCount( slide ) + 1, '/', getTotalSlides() );
|
||
break;
|
||
default:
|
||
let indices = getIndices( slide );
|
||
value.push( indices.h + 1 );
|
||
let sep = format === 'h/v' ? '/' : '.';
|
||
if( isVerticalSlide( slide ) ) value.push( sep, indices.v + 1 );
|
||
}
|
||
}
|
||
|
||
let url = '#' + locationHash( slide );
|
||
return formatSlideNumber( value[0], value[1], value[2], url );
|
||
|
||
}
|
||
|
||
/**
|
||
* Applies HTML formatting to a slide number before it's
|
||
* written to the DOM.
|
||
*
|
||
* @param {number} a Current slide
|
||
* @param {string} delimiter Character to separate slide numbers
|
||
* @param {(number|*)} b Total slides
|
||
* @param {HTMLElement} [url='#'+locationHash()] The url to link to
|
||
* @return {string} HTML string fragment
|
||
*/
|
||
function formatSlideNumber( a, delimiter, b, url = '#' + locationHash() ) {
|
||
|
||
if( typeof b === 'number' && !isNaN( b ) ) {
|
||
return `<a href="${url}">
|
||
<span class="slide-number-a">${a}</span>
|
||
<span class="slide-number-delimiter">${delimiter}</span>
|
||
<span class="slide-number-b">${b}</span>
|
||
</a>`;
|
||
}
|
||
else {
|
||
return `<a href="${url}">
|
||
<span class="slide-number-a">${a}</span>
|
||
</a>`;
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Updates the state of all control/navigation arrows.
|
||
*/
|
||
function updateControls() {
|
||
|
||
let routes = availableRoutes();
|
||
let fragments = availableFragments();
|
||
|
||
// Remove the 'enabled' class from all directions
|
||
[...dom.controlsLeft, ...dom.controlsRight, ...dom.controlsUp, ...dom.controlsDown, ...dom.controlsPrev, ...dom.controlsNext].forEach( node => {
|
||
node.classList.remove( 'enabled', 'fragmented' );
|
||
|
||
// Set 'disabled' attribute on all directions
|
||
node.setAttribute( 'disabled', 'disabled' );
|
||
} );
|
||
|
||
// Add the 'enabled' class to the available routes; remove 'disabled' attribute to enable buttons
|
||
if( routes.left ) dom.controlsLeft.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
||
if( routes.right ) dom.controlsRight.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
||
if( routes.up ) dom.controlsUp.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
||
if( routes.down ) dom.controlsDown.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
||
|
||
// Prev/next buttons
|
||
if( routes.left || routes.up ) dom.controlsPrev.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
||
if( routes.right || routes.down ) dom.controlsNext.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
||
|
||
// Highlight fragment directions
|
||
if( currentSlide ) {
|
||
|
||
// Always apply fragment decorator to prev/next buttons
|
||
if( fragments.prev ) dom.controlsPrev.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
||
if( fragments.next ) dom.controlsNext.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
||
|
||
// Apply fragment decorators to directional buttons based on
|
||
// what slide axis they are in
|
||
if( isVerticalSlide( currentSlide ) ) {
|
||
if( fragments.prev ) dom.controlsUp.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
||
if( fragments.next ) dom.controlsDown.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
||
}
|
||
else {
|
||
if( fragments.prev ) dom.controlsLeft.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
||
if( fragments.next ) dom.controlsRight.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
||
}
|
||
|
||
}
|
||
|
||
|
||
if( config.controlsTutorial ) {
|
||
|
||
// Highlight control arrows with an animation to ensure
|
||
// that the viewer knows how to navigate
|
||
if( !hasNavigatedVertically && routes.down ) {
|
||
dom.controlsDownArrow.classList.add( 'highlight' );
|
||
}
|
||
else {
|
||
dom.controlsDownArrow.classList.remove( 'highlight' );
|
||
|
||
if( config.rtl ) {
|
||
|
||
if( !hasNavigatedHorizontally && routes.left && indexv === 0 ) {
|
||
dom.controlsLeftArrow.classList.add( 'highlight' );
|
||
}
|
||
else {
|
||
dom.controlsLeftArrow.classList.remove( 'highlight' );
|
||
}
|
||
|
||
} else {
|
||
|
||
if( !hasNavigatedHorizontally && routes.right && indexv === 0 ) {
|
||
dom.controlsRightArrow.classList.add( 'highlight' );
|
||
}
|
||
else {
|
||
dom.controlsRightArrow.classList.remove( 'highlight' );
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Updates the background elements to reflect the current
|
||
* slide.
|
||
*
|
||
* @param {boolean} includeAll If true, the backgrounds of
|
||
* all vertical slides (not just the present) will be updated.
|
||
*/
|
||
function updateBackground( includeAll = false ) {
|
||
|
||
let currentBackground = null;
|
||
|
||
// Reverse past/future classes when in RTL mode
|
||
let horizontalPast = config.rtl ? 'future' : 'past',
|
||
horizontalFuture = config.rtl ? 'past' : 'future';
|
||
|
||
// Update the classes of all backgrounds to match the
|
||
// states of their slides (past/present/future)
|
||
toArray( dom.background.childNodes ).forEach( ( backgroundh, h ) => {
|
||
|
||
backgroundh.classList.remove( 'past', 'present', 'future' );
|
||
|
||
if( h < indexh ) {
|
||
backgroundh.classList.add( horizontalPast );
|
||
}
|
||
else if ( h > indexh ) {
|
||
backgroundh.classList.add( horizontalFuture );
|
||
}
|
||
else {
|
||
backgroundh.classList.add( 'present' );
|
||
|
||
// Store a reference to the current background element
|
||
currentBackground = backgroundh;
|
||
}
|
||
|
||
if( includeAll || h === indexh ) {
|
||
toArray( backgroundh.querySelectorAll( '.slide-background' ) ).forEach( ( backgroundv, v ) => {
|
||
|
||
backgroundv.classList.remove( 'past', 'present', 'future' );
|
||
|
||
if( v < indexv ) {
|
||
backgroundv.classList.add( 'past' );
|
||
}
|
||
else if ( v > indexv ) {
|
||
backgroundv.classList.add( 'future' );
|
||
}
|
||
else {
|
||
backgroundv.classList.add( 'present' );
|
||
|
||
// Only if this is the present horizontal and vertical slide
|
||
if( h === indexh ) currentBackground = backgroundv;
|
||
}
|
||
|
||
} );
|
||
}
|
||
|
||
} );
|
||
|
||
// Stop content inside of previous backgrounds
|
||
if( previousBackground ) {
|
||
|
||
stopEmbeddedContent( previousBackground, { unloadIframes: !shouldPreload( previousBackground ) } );
|
||
|
||
}
|
||
|
||
// Start content in the current background
|
||
if( currentBackground ) {
|
||
|
||
startEmbeddedContent( currentBackground );
|
||
|
||
let currentBackgroundContent = currentBackground.querySelector( '.slide-background-content' );
|
||
if( currentBackgroundContent ) {
|
||
|
||
let backgroundImageURL = currentBackgroundContent.style.backgroundImage || '';
|
||
|
||
// Restart GIFs (doesn't work in Firefox)
|
||
if( /\.gif/i.test( backgroundImageURL ) ) {
|
||
currentBackgroundContent.style.backgroundImage = '';
|
||
window.getComputedStyle( currentBackgroundContent ).opacity;
|
||
currentBackgroundContent.style.backgroundImage = backgroundImageURL;
|
||
}
|
||
|
||
}
|
||
|
||
// Don't transition between identical backgrounds. This
|
||
// prevents unwanted flicker.
|
||
let previousBackgroundHash = previousBackground ? previousBackground.getAttribute( 'data-background-hash' ) : null;
|
||
let currentBackgroundHash = currentBackground.getAttribute( 'data-background-hash' );
|
||
if( currentBackgroundHash && currentBackgroundHash === previousBackgroundHash && currentBackground !== previousBackground ) {
|
||
dom.background.classList.add( 'no-transition' );
|
||
}
|
||
|
||
previousBackground = currentBackground;
|
||
|
||
}
|
||
|
||
// If there's a background brightness flag for this slide,
|
||
// bubble it to the .reveal container
|
||
if( currentSlide ) {
|
||
[ 'has-light-background', 'has-dark-background' ].forEach( classToBubble => {
|
||
if( currentSlide.classList.contains( classToBubble ) ) {
|
||
dom.wrapper.classList.add( classToBubble );
|
||
}
|
||
else {
|
||
dom.wrapper.classList.remove( classToBubble );
|
||
}
|
||
} );
|
||
}
|
||
|
||
// Allow the first background to apply without transition
|
||
setTimeout( () => {
|
||
dom.background.classList.remove( 'no-transition' );
|
||
}, 1 );
|
||
|
||
}
|
||
|
||
/**
|
||
* Updates the position of the parallax background based
|
||
* on the current slide index.
|
||
*/
|
||
function updateParallax() {
|
||
|
||
if( config.parallaxBackgroundImage ) {
|
||
|
||
let horizontalSlides = getHorizontalSlides(),
|
||
verticalSlides = getVerticalSlides();
|
||
|
||
let backgroundSize = dom.background.style.backgroundSize.split( ' ' ),
|
||
backgroundWidth, backgroundHeight;
|
||
|
||
if( backgroundSize.length === 1 ) {
|
||
backgroundWidth = backgroundHeight = parseInt( backgroundSize[0], 10 );
|
||
}
|
||
else {
|
||
backgroundWidth = parseInt( backgroundSize[0], 10 );
|
||
backgroundHeight = parseInt( backgroundSize[1], 10 );
|
||
}
|
||
|
||
let slideWidth = dom.background.offsetWidth,
|
||
horizontalSlideCount = horizontalSlides.length,
|
||
horizontalOffsetMultiplier,
|
||
horizontalOffset;
|
||
|
||
if( typeof config.parallaxBackgroundHorizontal === 'number' ) {
|
||
horizontalOffsetMultiplier = config.parallaxBackgroundHorizontal;
|
||
}
|
||
else {
|
||
horizontalOffsetMultiplier = horizontalSlideCount > 1 ? ( backgroundWidth - slideWidth ) / ( horizontalSlideCount-1 ) : 0;
|
||
}
|
||
|
||
horizontalOffset = horizontalOffsetMultiplier * indexh * -1;
|
||
|
||
let slideHeight = dom.background.offsetHeight,
|
||
verticalSlideCount = verticalSlides.length,
|
||
verticalOffsetMultiplier,
|
||
verticalOffset;
|
||
|
||
if( typeof config.parallaxBackgroundVertical === 'number' ) {
|
||
verticalOffsetMultiplier = config.parallaxBackgroundVertical;
|
||
}
|
||
else {
|
||
verticalOffsetMultiplier = ( backgroundHeight - slideHeight ) / ( verticalSlideCount-1 );
|
||
}
|
||
|
||
verticalOffset = verticalSlideCount > 0 ? verticalOffsetMultiplier * indexv : 0;
|
||
|
||
dom.background.style.backgroundPosition = horizontalOffset + 'px ' + -verticalOffset + 'px';
|
||
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Runs an auto-animation between the given slides.
|
||
*
|
||
* @param {HTMLElement} fromSlide
|
||
* @param {HTMLElement} toSlide
|
||
*/
|
||
function autoAnimate( fromSlide, toSlide ) {
|
||
|
||
// Clean up after prior animations
|
||
removeEphemeralAutoAnimateAttributes();
|
||
|
||
if( autoAnimateStyleSheet && autoAnimateStyleSheet.parentNode ) {
|
||
autoAnimateStyleSheet.parentNode.removeChild( autoAnimateStyleSheet );
|
||
autoAnimateStyleSheet = null;
|
||
}
|
||
|
||
// Ensure that both slides are auto-animate targets
|
||
if( fromSlide.hasAttribute( 'data-auto-animate' ) && toSlide.hasAttribute( 'data-auto-animate' ) ) {
|
||
|
||
// Create a new auto-animate sheet
|
||
autoAnimateStyleSheet = autoAnimateStyleSheet || document.createElement( 'style' );
|
||
autoAnimateStyleSheet.type = 'text/css';
|
||
document.head.appendChild( autoAnimateStyleSheet );
|
||
|
||
let animationOptions = getAutoAnimateOptions( toSlide );
|
||
|
||
// Set our starting state
|
||
fromSlide.dataset.autoAnimate = 'pending';
|
||
toSlide.dataset.autoAnimate = 'pending';
|
||
|
||
// Inject our auto-animate styles for this transition
|
||
let css = getAutoAnimatableElements( fromSlide, toSlide ).map( elements => {
|
||
return getAutoAnimateCSS( elements.from, elements.to, elements.options || {}, animationOptions, autoAnimateCounter++ );
|
||
} );
|
||
|
||
// Animate unmatched elements, if enabled
|
||
if( toSlide.dataset.autoAnimateUnmatched !== 'false' && config.autoAnimateUnmatched === true ) {
|
||
getUnmatchedAutoAnimateElements( toSlide ).forEach( unmatchedElement => {
|
||
unmatchedElement.dataset.autoAnimateTarget = 'unmatched';
|
||
} );
|
||
|
||
css.push( `[data-auto-animate="running"] [data-auto-animate-target="unmatched"] { transition: opacity ${animationOptions.duration*0.8}s ease ${animationOptions.duration*0.2}s; }` );
|
||
}
|
||
|
||
// Setting the whole chunk of CSS at once is the most
|
||
// efficient way to do this. Using sheet.insertRule
|
||
// is multiple factors slower.
|
||
autoAnimateStyleSheet.innerHTML = css.join( '' );
|
||
|
||
// Start the animation next cycle
|
||
requestAnimationFrame( () => {
|
||
if( autoAnimateStyleSheet ) {
|
||
// This forces our newly injected styles to be applied in Firefox
|
||
getComputedStyle( autoAnimateStyleSheet ).fontWeight;
|
||
|
||
toSlide.dataset.autoAnimate = 'running';
|
||
}
|
||
} );
|
||
|
||
dispatchEvent( 'autoanimate', { fromSlide: fromSlide, toSlide: toSlide, sheet: autoAnimateStyleSheet } );
|
||
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Removes all attributes that we temporarily add to slide
|
||
* elements in order to carry out auto-animation.
|
||
*/
|
||
function removeEphemeralAutoAnimateAttributes() {
|
||
|
||
toArray( dom.wrapper.querySelectorAll( '[data-auto-animate-target]' ) ).forEach( element => {
|
||
delete element.dataset.autoAnimateTarget;
|
||
} );
|
||
|
||
}
|
||
|
||
/**
|
||
* Auto-animates the properties of an element from their original
|
||
* values to their new state.
|
||
*
|
||
* @param {HTMLElement} from
|
||
* @param {HTMLElement} to
|
||
* @param {Object} elementOptions Options for this element pair
|
||
* @param {Object} animationOptions Options set at the slide level
|
||
* @param {String} id Unique ID that we can use to identify this
|
||
* auto-animate element in the DOM
|
||
*/
|
||
function getAutoAnimateCSS( from, to, elementOptions, animationOptions, id ) {
|
||
|
||
// 'from' elements are given a data-auto-animate-target with no value,
|
||
// 'to' elements are are given a data-auto-animate-target with an ID
|
||
from.dataset.autoAnimateTarget = '';
|
||
to.dataset.autoAnimateTarget = id;
|
||
|
||
// Each element may override any of the auto-animate options
|
||
// like transition easing, duration and delay via data-attributes
|
||
let options = getAutoAnimateOptions( to, animationOptions );
|
||
|
||
// If we're using a custom element matcher the element options
|
||
// may contain additional transition overrides
|
||
if( typeof elementOptions.delay !== 'undefined' ) options.delay = elementOptions.delay;
|
||
if( typeof elementOptions.duration !== 'undefined' ) options.duration = elementOptions.duration;
|
||
if( typeof elementOptions.easing !== 'undefined' ) options.easing = elementOptions.easing;
|
||
|
||
let fromProps = getAutoAnimatableProperties( 'from', from, elementOptions ),
|
||
toProps = getAutoAnimatableProperties( 'to', to, elementOptions );
|
||
|
||
// If translation and/or scaling are enabled, css transform
|
||
// the 'to' element so that it matches the position and size
|
||
// of the 'from' element
|
||
if( elementOptions.translate !== false || elementOptions.scale !== false ) {
|
||
|
||
let presentationScale = Reveal.getScale();
|
||
|
||
let delta = {
|
||
x: ( fromProps.x - toProps.x ) / presentationScale,
|
||
y: ( fromProps.y - toProps.y ) / presentationScale,
|
||
scaleX: fromProps.width / toProps.width,
|
||
scaleY: fromProps.height / toProps.height
|
||
};
|
||
|
||
// Limit decimal points to avoid 0.0001px blur and stutter
|
||
delta.x = Math.round( delta.x * 1000 ) / 1000;
|
||
delta.y = Math.round( delta.y * 1000 ) / 1000;
|
||
delta.scaleX = Math.round( delta.scaleX * 1000 ) / 1000;
|
||
delta.scaleX = Math.round( delta.scaleX * 1000 ) / 1000;
|
||
|
||
let translate = elementOptions.translate !== false && ( delta.x !== 0 || delta.y !== 0 ),
|
||
scale = elementOptions.scale !== false && ( delta.scaleX !== 0 || delta.scaleY !== 0 );
|
||
|
||
// No need to transform if nothing's changed
|
||
if( translate || scale ) {
|
||
|
||
let transform = [];
|
||
|
||
if( translate ) transform.push( `translate(${delta.x}px, ${delta.y}px)` );
|
||
if( scale ) transform.push( `scale(${delta.scaleX}, ${delta.scaleY})` );
|
||
|
||
fromProps.styles['transform'] = transform.join( ' ' );
|
||
fromProps.styles['transform-origin'] = 'top left';
|
||
|
||
toProps.styles['transform'] = 'none';
|
||
|
||
}
|
||
|
||
}
|
||
|
||
// Delete all unchanged 'to' styles
|
||
for( let propertyName in toProps.styles ) {
|
||
const toValue = toProps.styles[propertyName];
|
||
const fromValue = fromProps.styles[propertyName];
|
||
|
||
if( toValue === fromValue ) {
|
||
delete toProps.styles[propertyName];
|
||
}
|
||
else {
|
||
// If these property values were set via a custom matcher providing
|
||
// an explicit 'from' and/or 'to' value, we always inject those values.
|
||
if( toValue.explicitValue === true ) {
|
||
toProps.styles[propertyName] = toValue.value;
|
||
}
|
||
|
||
if( fromValue.explicitValue === true ) {
|
||
fromProps.styles[propertyName] = fromValue.value;
|
||
}
|
||
}
|
||
}
|
||
|
||
let css = '';
|
||
|
||
let toStyleProperties = Object.keys( toProps.styles );
|
||
|
||
// Only create animate this element IF at least one style
|
||
// property has changed
|
||
if( toStyleProperties.length > 0 ) {
|
||
|
||
// Instantly move to the 'from' state
|
||
fromProps.styles['transition'] = 'none';
|
||
|
||
// Animate towards the 'to' state
|
||
toProps.styles['transition'] = `all ${options.duration}s ${options.easing} ${options.delay}s`;
|
||
toProps.styles['transition-property'] = toStyleProperties.join( ', ' );
|
||
toProps.styles['will-change'] = toStyleProperties.join( ', ' );
|
||
|
||
// Build up our custom CSS. We need to override inline styles
|
||
// so we need to make our styles vErY IMPORTANT!1!!
|
||
let fromCSS = Object.keys( fromProps.styles ).map( propertyName => {
|
||
return propertyName + ': ' + fromProps.styles[propertyName] + ' !important;';
|
||
} ).join( '' );
|
||
|
||
let toCSS = Object.keys( toProps.styles ).map( propertyName => {
|
||
return propertyName + ': ' + toProps.styles[propertyName] + ' !important;';
|
||
} ).join( '' );
|
||
|
||
css = '[data-auto-animate-target="'+ id +'"] {'+ fromCSS +'}' +
|
||
'[data-auto-animate="running"] [data-auto-animate-target="'+ id +'"] {'+ toCSS +'}';
|
||
|
||
}
|
||
|
||
return css;
|
||
|
||
}
|
||
|
||
/**
|
||
* Returns the auto-animate options for the given element.
|
||
*
|
||
* @param {HTMLElement} element Element to pick up options
|
||
* from, either a slide or an animation target
|
||
* @param {Object} [inheritedOptions] Optional set of existing
|
||
* options
|
||
*/
|
||
function getAutoAnimateOptions( element, inheritedOptions ) {
|
||
|
||
let options = {
|
||
easing: config.autoAnimateEasing,
|
||
duration: config.autoAnimateDuration,
|
||
delay: 0
|
||
};
|
||
|
||
options = extend( options, inheritedOptions );
|
||
|
||
// Inherit options from parent elements
|
||
if( element.closest && element.parentNode ) {
|
||
let autoAnimatedParent = element.parentNode.closest( '[data-auto-animate-target]' );
|
||
if( autoAnimatedParent ) {
|
||
options = getAutoAnimateOptions( autoAnimatedParent, options );
|
||
}
|
||
}
|
||
|
||
if( element.dataset.autoAnimateEasing ) {
|
||
options.easing = element.dataset.autoAnimateEasing;
|
||
}
|
||
|
||
if( element.dataset.autoAnimateDuration ) {
|
||
options.duration = parseFloat( element.dataset.autoAnimateDuration );
|
||
}
|
||
|
||
if( element.dataset.autoAnimateDelay ) {
|
||
options.delay = parseFloat( element.dataset.autoAnimateDelay );
|
||
}
|
||
|
||
return options;
|
||
|
||
}
|
||
|
||
/**
|
||
* Returns an object containing all of the properties
|
||
* that can be auto-animated for the given element and
|
||
* their current computed values.
|
||
*
|
||
* @param {String} direction 'from' or 'to'
|
||
*/
|
||
function getAutoAnimatableProperties( direction, element, elementOptions ) {
|
||
|
||
let properties = { styles: [] };
|
||
|
||
// Position and size
|
||
if( elementOptions.translate !== false || elementOptions.scale !== false ) {
|
||
let bounds;
|
||
|
||
// Custom auto-animate may optionally return a custom tailored
|
||
// measurement function
|
||
if( typeof elementOptions.measure === 'function' ) {
|
||
bounds = elementOptions.measure( element );
|
||
}
|
||
else {
|
||
bounds = element.getBoundingClientRect();
|
||
}
|
||
|
||
properties.x = bounds.x;
|
||
properties.y = bounds.y;
|
||
properties.width = bounds.width;
|
||
properties.height = bounds.height;
|
||
}
|
||
|
||
const computedStyles = getComputedStyle( element );
|
||
|
||
// CSS styles
|
||
( elementOptions.styles || config.autoAnimateStyles ).forEach( style => {
|
||
let value;
|
||
|
||
// `style` is either the property name directly, or an object
|
||
// definition of a style property
|
||
if( typeof style === 'string' ) style = { property: style };
|
||
|
||
if( typeof style.from !== 'undefined' && direction === 'from' ) {
|
||
value = { value: style.from, explicitValue: true };
|
||
}
|
||
else if( typeof style.to !== 'undefined' && direction === 'to' ) {
|
||
value = { value: style.to, explicitValue: true };
|
||
}
|
||
else {
|
||
value = computedStyles[style.property];
|
||
}
|
||
|
||
if( value !== '' ) {
|
||
properties.styles[style.property] = value;
|
||
}
|
||
} );
|
||
|
||
return properties;
|
||
|
||
}
|
||
|
||
/**
|
||
* Get a list of all element pairs that we can animate
|
||
* between the given slides.
|
||
*
|
||
* @param {HTMLElement} fromSlide
|
||
* @param {HTMLElement} toSlide
|
||
*
|
||
* @return {Array} Each value is an array where [0] is
|
||
* the element we're animating from and [1] is the
|
||
* element we're animating to
|
||
*/
|
||
function getAutoAnimatableElements( fromSlide, toSlide ) {
|
||
|
||
let matcher = typeof config.autoAnimateMatcher === 'function' ? config.autoAnimateMatcher : getAutoAnimatePairs;
|
||
|
||
let pairs = matcher( fromSlide, toSlide );
|
||
|
||
let reserved = [];
|
||
|
||
// Remove duplicate pairs
|
||
return pairs.filter( ( pair, index ) => {
|
||
if( reserved.indexOf( pair.to ) === -1 ) {
|
||
reserved.push( pair.to );
|
||
return true;
|
||
}
|
||
} );
|
||
|
||
}
|
||
|
||
/**
|
||
* Identifies matching elements between slides.
|
||
*
|
||
* You can specify a custom matcher function by using
|
||
* the `autoAnimateMatcher` config option.
|
||
*/
|
||
function getAutoAnimatePairs( fromSlide, toSlide ) {
|
||
|
||
let pairs = [];
|
||
|
||
const codeNodes = 'pre';
|
||
const textNodes = 'h1, h2, h3, h4, h5, h6, p, li';
|
||
const mediaNodes = 'img, video, iframe';
|
||
|
||
// Eplicit matches via data-id
|
||
findAutoAnimateMatches( pairs, fromSlide, toSlide, '[data-id]', node => {
|
||
return node.nodeName + ':::' + node.getAttribute( 'data-id' );
|
||
} );
|
||
|
||
// Text
|
||
findAutoAnimateMatches( pairs, fromSlide, toSlide, textNodes, node => {
|
||
return node.nodeName + ':::' + node.innerText;
|
||
} );
|
||
|
||
// Media
|
||
findAutoAnimateMatches( pairs, fromSlide, toSlide, mediaNodes, node => {
|
||
return node.nodeName + ':::' + ( node.getAttribute( 'src' ) || node.getAttribute( 'data-src' ) );
|
||
} );
|
||
|
||
// Code
|
||
findAutoAnimateMatches( pairs, fromSlide, toSlide, codeNodes, node => {
|
||
return node.nodeName + ':::' + node.innerText;
|
||
} );
|
||
|
||
pairs.forEach( pair => {
|
||
|
||
// Disable scale transformations on text nodes, we transiition
|
||
// each individual text property instead
|
||
if( pair.from.matches( textNodes ) ) {
|
||
pair.options = { scale: false };
|
||
}
|
||
// Animate individual lines of code
|
||
else if( pair.from.matches( codeNodes ) ) {
|
||
|
||
// Transition the code block's width and height instead of scaling
|
||
// to prevent its content from being squished
|
||
pair.options = { scale: false, styles: [ 'width', 'height' ] };
|
||
|
||
// Lines of code
|
||
findAutoAnimateMatches( pairs, pair.from, pair.to, '.hljs .hljs-ln-code', node => {
|
||
return node.textContent;
|
||
}, {
|
||
scale: false,
|
||
styles: [],
|
||
measure: getLocalBoundingBox
|
||
} );
|
||
|
||
// Line numbers
|
||
findAutoAnimateMatches( pairs, pair.from, pair.to, '.hljs .hljs-ln-line[data-line-number]', node => {
|
||
return node.getAttribute( 'data-line-number' );
|
||
}, {
|
||
scale: false,
|
||
styles: [ 'width' ],
|
||
measure: getLocalBoundingBox
|
||
} );
|
||
|
||
}
|
||
|
||
} );
|
||
|
||
return pairs;
|
||
|
||
}
|
||
|
||
/**
|
||
* Helper method which returns a bounding box based on
|
||
* the given elements offset coordinates.
|
||
*
|
||
* @param {HTMLElement} element
|
||
* @return {Object} x, y, width, height
|
||
*/
|
||
function getLocalBoundingBox( element ) {
|
||
|
||
const presentationScale = Reveal.getScale();
|
||
|
||
return {
|
||
x: Math.round( ( element.offsetLeft * presentationScale ) * 100 ) / 100,
|
||
y: Math.round( ( element.offsetTop * presentationScale ) * 100 ) / 100,
|
||
width: Math.round( ( element.offsetWidth * presentationScale ) * 100 ) / 100,
|
||
height: Math.round( ( element.offsetHeight * presentationScale ) * 100 ) / 100
|
||
};
|
||
|
||
}
|
||
|
||
/**
|
||
* Finds matching elements between two slides.
|
||
*
|
||
* @param {Array} pairs List of pairs to push matches to
|
||
* @param {HTMLElement} fromScope Scope within the from element exists
|
||
* @param {HTMLElement} toScope Scope within the to element exists
|
||
* @param {String} selector CSS selector of the element to match
|
||
* @param {Function} serializer A function that accepts an element and returns
|
||
* a stringified ID based on its contents
|
||
* @param {Object} animationOptions Optional config options for this pair
|
||
*/
|
||
function findAutoAnimateMatches( pairs, fromScope, toScope, selector, serializer, animationOptions ) {
|
||
|
||
let fromMatches = {};
|
||
let toMatches = {};
|
||
|
||
[].slice.call( fromScope.querySelectorAll( selector ) ).forEach( ( element, i ) => {
|
||
const key = serializer( element );
|
||
if( typeof key === 'string' && key.length ) {
|
||
fromMatches[key] = fromMatches[key] || [];
|
||
fromMatches[key].push( element );
|
||
}
|
||
} );
|
||
|
||
[].slice.call( toScope.querySelectorAll( selector ) ).forEach( ( element, i ) => {
|
||
const key = serializer( element );
|
||
toMatches[key] = toMatches[key] || [];
|
||
toMatches[key].push( element );
|
||
|
||
let fromElement;
|
||
|
||
// Retrieve the 'from' element
|
||
if( fromMatches[key] ) {
|
||
const pimaryIndex = toMatches[key].length - 1;
|
||
const secondaryIndex = fromMatches[key].length - 1;
|
||
|
||
// If there are multiple identical from elements, retrieve
|
||
// the one at the same index as our to-element.
|
||
if( fromMatches[key][ pimaryIndex ] ) {
|
||
fromElement = fromMatches[key][ pimaryIndex ];
|
||
fromMatches[key][ pimaryIndex ] = null;
|
||
}
|
||
// If there are no matching from-elements at the same index,
|
||
// use the last one.
|
||
else if( fromMatches[key][ secondaryIndex ] ) {
|
||
fromElement = fromMatches[key][ secondaryIndex ];
|
||
fromMatches[key][ secondaryIndex ] = null;
|
||
}
|
||
}
|
||
|
||
// If we've got a matching pair, push it to the list of pairs
|
||
if( fromElement ) {
|
||
pairs.push({
|
||
from: fromElement,
|
||
to: element,
|
||
options: animationOptions
|
||
});
|
||
}
|
||
} );
|
||
|
||
}
|
||
|
||
/**
|
||
* Returns a all elements within the given scope that should
|
||
* be considered unmatched in an auto-animate transition. If
|
||
* fading of unmatched elements is turned on, these elements
|
||
* will fade when going between auto-animate slides.
|
||
*
|
||
* Note that parents of auto-animate targets are NOT considerd
|
||
* unmatched since fading them would break the auto-animation.
|
||
*
|
||
* @param {HTMLElement} rootElement
|
||
* @return {Array}
|
||
*/
|
||
function getUnmatchedAutoAnimateElements( rootElement ) {
|
||
|
||
return [].slice.call( rootElement.children ).reduce( ( result, element ) => {
|
||
|
||
const containsAnimatedElements = element.querySelector( '[data-auto-animate-target]' );
|
||
|
||
// The element is unmatched if
|
||
// - It is not an auto-animate target
|
||
// - It does not contain any auto-animate targets
|
||
if( !element.hasAttribute( 'data-auto-animate-target' ) && !containsAnimatedElements ) {
|
||
result.push( element );
|
||
}
|
||
|
||
if( element.querySelector( '[data-auto-animate-target]' ) ) {
|
||
result = result.concat( getUnmatchedAutoAnimateElements( element ) );
|
||
}
|
||
|
||
return result;
|
||
|
||
}, [] );
|
||
|
||
}
|
||
|
||
/**
|
||
* Should the given element be preloaded?
|
||
* Decides based on local element attributes and global config.
|
||
*
|
||
* @param {HTMLElement} element
|
||
*/
|
||
function shouldPreload( element ) {
|
||
|
||
// Prefer an explicit global preload setting
|
||
let preload = config.preloadIframes;
|
||
|
||
// If no global setting is available, fall back on the element's
|
||
// own preload setting
|
||
if( typeof preload !== 'boolean' ) {
|
||
preload = element.hasAttribute( 'data-preload' );
|
||
}
|
||
|
||
return preload;
|
||
}
|
||
|
||
/**
|
||
* Called when the given slide is within the configured view
|
||
* distance. Shows the slide element and loads any content
|
||
* that is set to load lazily (data-src).
|
||
*
|
||
* @param {HTMLElement} slide Slide to show
|
||
*/
|
||
function loadSlide( slide, options = {} ) {
|
||
|
||
// Show the slide element
|
||
slide.style.display = config.display;
|
||
|
||
// Media elements with data-src attributes
|
||
toArray( slide.querySelectorAll( 'img[data-src], video[data-src], audio[data-src], iframe[data-src]' ) ).forEach( element => {
|
||
if( element.tagName !== 'IFRAME' || shouldPreload( element ) ) {
|
||
element.setAttribute( 'src', element.getAttribute( 'data-src' ) );
|
||
element.setAttribute( 'data-lazy-loaded', '' );
|
||
element.removeAttribute( 'data-src' );
|
||
}
|
||
} );
|
||
|
||
// Media elements with <source> children
|
||
toArray( slide.querySelectorAll( 'video, audio' ) ).forEach( media => {
|
||
let sources = 0;
|
||
|
||
toArray( media.querySelectorAll( 'source[data-src]' ) ).forEach( source => {
|
||
source.setAttribute( 'src', source.getAttribute( 'data-src' ) );
|
||
source.removeAttribute( 'data-src' );
|
||
source.setAttribute( 'data-lazy-loaded', '' );
|
||
sources += 1;
|
||
} );
|
||
|
||
// If we rewrote sources for this video/audio element, we need
|
||
// to manually tell it to load from its new origin
|
||
if( sources > 0 ) {
|
||
media.load();
|
||
}
|
||
} );
|
||
|
||
|
||
// Show the corresponding background element
|
||
let background = slide.slideBackgroundElement;
|
||
if( background ) {
|
||
background.style.display = 'block';
|
||
|
||
let backgroundContent = slide.slideBackgroundContentElement;
|
||
let backgroundIframe = slide.getAttribute( 'data-background-iframe' );
|
||
|
||
// If the background contains media, load it
|
||
if( background.hasAttribute( 'data-loaded' ) === false ) {
|
||
background.setAttribute( 'data-loaded', 'true' );
|
||
|
||
let backgroundImage = slide.getAttribute( 'data-background-image' ),
|
||
backgroundVideo = slide.getAttribute( 'data-background-video' ),
|
||
backgroundVideoLoop = slide.hasAttribute( 'data-background-video-loop' ),
|
||
backgroundVideoMuted = slide.hasAttribute( 'data-background-video-muted' );
|
||
|
||
// Images
|
||
if( backgroundImage ) {
|
||
backgroundContent.style.backgroundImage = 'url('+ encodeURI( backgroundImage ) +')';
|
||
}
|
||
// Videos
|
||
else if ( backgroundVideo && !isSpeakerNotes() ) {
|
||
let video = document.createElement( 'video' );
|
||
|
||
if( backgroundVideoLoop ) {
|
||
video.setAttribute( 'loop', '' );
|
||
}
|
||
|
||
if( backgroundVideoMuted ) {
|
||
video.muted = true;
|
||
}
|
||
|
||
// Inline video playback works (at least in Mobile Safari) as
|
||
// long as the video is muted and the `playsinline` attribute is
|
||
// present
|
||
if( isMobileDevice ) {
|
||
video.muted = true;
|
||
video.autoplay = true;
|
||
video.setAttribute( 'playsinline', '' );
|
||
}
|
||
|
||
// Support comma separated lists of video sources
|
||
backgroundVideo.split( ',' ).forEach( source => {
|
||
video.innerHTML += '<source src="'+ source +'">';
|
||
} );
|
||
|
||
backgroundContent.appendChild( video );
|
||
}
|
||
// Iframes
|
||
else if( backgroundIframe && options.excludeIframes !== true ) {
|
||
let iframe = document.createElement( 'iframe' );
|
||
iframe.setAttribute( 'allowfullscreen', '' );
|
||
iframe.setAttribute( 'mozallowfullscreen', '' );
|
||
iframe.setAttribute( 'webkitallowfullscreen', '' );
|
||
iframe.setAttribute( 'allow', 'autoplay' );
|
||
|
||
iframe.setAttribute( 'data-src', backgroundIframe );
|
||
|
||
iframe.style.width = '100%';
|
||
iframe.style.height = '100%';
|
||
iframe.style.maxHeight = '100%';
|
||
iframe.style.maxWidth = '100%';
|
||
|
||
backgroundContent.appendChild( iframe );
|
||
}
|
||
}
|
||
|
||
// Start loading preloadable iframes
|
||
let backgroundIframeElement = backgroundContent.querySelector( 'iframe[data-src]' );
|
||
if( backgroundIframeElement ) {
|
||
|
||
// Check if this iframe is eligible to be preloaded
|
||
if( shouldPreload( background ) && !/autoplay=(1|true|yes)/gi.test( backgroundIframe ) ) {
|
||
if( backgroundIframeElement.getAttribute( 'src' ) !== backgroundIframe ) {
|
||
backgroundIframeElement.setAttribute( 'src', backgroundIframe );
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Unloads and hides the given slide. This is called when the
|
||
* slide is moved outside of the configured view distance.
|
||
*
|
||
* @param {HTMLElement} slide
|
||
*/
|
||
function unloadSlide( slide ) {
|
||
|
||
// Hide the slide element
|
||
slide.style.display = 'none';
|
||
|
||
// Hide the corresponding background element
|
||
let background = getSlideBackground( slide );
|
||
if( background ) {
|
||
background.style.display = 'none';
|
||
|
||
// Unload any background iframes
|
||
toArray( background.querySelectorAll( 'iframe[src]' ) ).forEach( element => {
|
||
element.removeAttribute( 'src' );
|
||
} );
|
||
}
|
||
|
||
// Reset lazy-loaded media elements with src attributes
|
||
toArray( slide.querySelectorAll( 'video[data-lazy-loaded][src], audio[data-lazy-loaded][src], iframe[data-lazy-loaded][src]' ) ).forEach( element => {
|
||
element.setAttribute( 'data-src', element.getAttribute( 'src' ) );
|
||
element.removeAttribute( 'src' );
|
||
} );
|
||
|
||
// Reset lazy-loaded media elements with <source> children
|
||
toArray( slide.querySelectorAll( 'video[data-lazy-loaded] source[src], audio source[src]' ) ).forEach( source => {
|
||
source.setAttribute( 'data-src', source.getAttribute( 'src' ) );
|
||
source.removeAttribute( 'src' );
|
||
} );
|
||
|
||
}
|
||
|
||
/**
|
||
* Determine what available routes there are for navigation.
|
||
*
|
||
* @return {{left: boolean, right: boolean, up: boolean, down: boolean}}
|
||
*/
|
||
function availableRoutes() {
|
||
|
||
let horizontalSlides = dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ),
|
||
verticalSlides = dom.wrapper.querySelectorAll( VERTICAL_SLIDES_SELECTOR );
|
||
|
||
let routes = {
|
||
left: indexh > 0,
|
||
right: indexh < horizontalSlides.length - 1,
|
||
up: indexv > 0,
|
||
down: indexv < verticalSlides.length - 1
|
||
};
|
||
|
||
// Looped presentations can always be navigated as long as
|
||
// there are slides available
|
||
if( config.loop ) {
|
||
if( horizontalSlides.length > 1 ) {
|
||
routes.left = true;
|
||
routes.right = true;
|
||
}
|
||
|
||
if( verticalSlides.length > 1 ) {
|
||
routes.up = true;
|
||
routes.down = true;
|
||
}
|
||
}
|
||
|
||
// Reverse horizontal controls for rtl
|
||
if( config.rtl ) {
|
||
let left = routes.left;
|
||
routes.left = routes.right;
|
||
routes.right = left;
|
||
}
|
||
|
||
return routes;
|
||
|
||
}
|
||
|
||
/**
|
||
* Returns an object describing the available fragment
|
||
* directions.
|
||
*
|
||
* @return {{prev: boolean, next: boolean}}
|
||
*/
|
||
function availableFragments() {
|
||
|
||
if( currentSlide && config.fragments ) {
|
||
let fragments = currentSlide.querySelectorAll( '.fragment' );
|
||
let hiddenFragments = currentSlide.querySelectorAll( '.fragment:not(.visible)' );
|
||
|
||
return {
|
||
prev: fragments.length - hiddenFragments.length > 0,
|
||
next: !!hiddenFragments.length
|
||
};
|
||
}
|
||
else {
|
||
return { prev: false, next: false };
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Enforces origin-specific format rules for embedded media.
|
||
*/
|
||
function formatEmbeddedContent() {
|
||
|
||
let _appendParamToIframeSource = ( sourceAttribute, sourceURL, param ) => {
|
||
toArray( dom.slides.querySelectorAll( 'iframe['+ sourceAttribute +'*="'+ sourceURL +'"]' ) ).forEach( el => {
|
||
let src = el.getAttribute( sourceAttribute );
|
||
if( src && src.indexOf( param ) === -1 ) {
|
||
el.setAttribute( sourceAttribute, src + ( !/\?/.test( src ) ? '?' : '&' ) + param );
|
||
}
|
||
});
|
||
};
|
||
|
||
// YouTube frames must include "?enablejsapi=1"
|
||
_appendParamToIframeSource( 'src', 'youtube.com/embed/', 'enablejsapi=1' );
|
||
_appendParamToIframeSource( 'data-src', 'youtube.com/embed/', 'enablejsapi=1' );
|
||
|
||
// Vimeo frames must include "?api=1"
|
||
_appendParamToIframeSource( 'src', 'player.vimeo.com/', 'api=1' );
|
||
_appendParamToIframeSource( 'data-src', 'player.vimeo.com/', 'api=1' );
|
||
|
||
}
|
||
|
||
/**
|
||
* Start playback of any embedded content inside of
|
||
* the given element.
|
||
*
|
||
* @param {HTMLElement} element
|
||
*/
|
||
function startEmbeddedContent( element ) {
|
||
|
||
if( element && !isSpeakerNotes() ) {
|
||
|
||
// Restart GIFs
|
||
toArray( element.querySelectorAll( 'img[src$=".gif"]' ) ).forEach( el => {
|
||
// Setting the same unchanged source like this was confirmed
|
||
// to work in Chrome, FF & Safari
|
||
el.setAttribute( 'src', el.getAttribute( 'src' ) );
|
||
} );
|
||
|
||
// HTML5 media elements
|
||
toArray( element.querySelectorAll( 'video, audio' ) ).forEach( el => {
|
||
if( closestParent( el, '.fragment' ) && !closestParent( el, '.fragment.visible' ) ) {
|
||
return;
|
||
}
|
||
|
||
// Prefer an explicit global autoplay setting
|
||
let autoplay = config.autoPlayMedia;
|
||
|
||
// If no global setting is available, fall back on the element's
|
||
// own autoplay setting
|
||
if( typeof autoplay !== 'boolean' ) {
|
||
autoplay = el.hasAttribute( 'data-autoplay' ) || !!closestParent( el, '.slide-background' );
|
||
}
|
||
|
||
if( autoplay && typeof el.play === 'function' ) {
|
||
|
||
// If the media is ready, start playback
|
||
if( el.readyState > 1 ) {
|
||
startEmbeddedMedia( { target: el } );
|
||
}
|
||
// Mobile devices never fire a loaded event so instead
|
||
// of waiting, we initiate playback
|
||
else if( isMobileDevice ) {
|
||
let promise = el.play();
|
||
|
||
// If autoplay does not work, ensure that the controls are visible so
|
||
// that the viewer can start the media on their own
|
||
if( promise && typeof promise.catch === 'function' && el.controls === false ) {
|
||
promise.catch( () => {
|
||
el.controls = true;
|
||
|
||
// Once the video does start playing, hide the controls again
|
||
el.addEventListener( 'play', () => {
|
||
el.controls = false;
|
||
} );
|
||
} );
|
||
}
|
||
}
|
||
// If the media isn't loaded, wait before playing
|
||
else {
|
||
el.removeEventListener( 'loadeddata', startEmbeddedMedia ); // remove first to avoid dupes
|
||
el.addEventListener( 'loadeddata', startEmbeddedMedia );
|
||
}
|
||
|
||
}
|
||
} );
|
||
|
||
// Normal iframes
|
||
toArray( element.querySelectorAll( 'iframe[src]' ) ).forEach( el => {
|
||
if( closestParent( el, '.fragment' ) && !closestParent( el, '.fragment.visible' ) ) {
|
||
return;
|
||
}
|
||
|
||
startEmbeddedIframe( { target: el } );
|
||
} );
|
||
|
||
// Lazy loading iframes
|
||
toArray( element.querySelectorAll( 'iframe[data-src]' ) ).forEach( el => {
|
||
if( closestParent( el, '.fragment' ) && !closestParent( el, '.fragment.visible' ) ) {
|
||
return;
|
||
}
|
||
|
||
if( el.getAttribute( 'src' ) !== el.getAttribute( 'data-src' ) ) {
|
||
el.removeEventListener( 'load', startEmbeddedIframe ); // remove first to avoid dupes
|
||
el.addEventListener( 'load', startEmbeddedIframe );
|
||
el.setAttribute( 'src', el.getAttribute( 'data-src' ) );
|
||
}
|
||
} );
|
||
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Starts playing an embedded video/audio element after
|
||
* it has finished loading.
|
||
*
|
||
* @param {object} event
|
||
*/
|
||
function startEmbeddedMedia( event ) {
|
||
|
||
let isAttachedToDOM = !!closestParent( event.target, 'html' ),
|
||
isVisible = !!closestParent( event.target, '.present' );
|
||
|
||
if( isAttachedToDOM && isVisible ) {
|
||
event.target.currentTime = 0;
|
||
event.target.play();
|
||
}
|
||
|
||
event.target.removeEventListener( 'loadeddata', startEmbeddedMedia );
|
||
|
||
}
|
||
|
||
/**
|
||
* "Starts" the content of an embedded iframe using the
|
||
* postMessage API.
|
||
*
|
||
* @param {object} event
|
||
*/
|
||
function startEmbeddedIframe( event ) {
|
||
|
||
let iframe = event.target;
|
||
|
||
if( iframe && iframe.contentWindow ) {
|
||
|
||
let isAttachedToDOM = !!closestParent( event.target, 'html' ),
|
||
isVisible = !!closestParent( event.target, '.present' );
|
||
|
||
if( isAttachedToDOM && isVisible ) {
|
||
|
||
// Prefer an explicit global autoplay setting
|
||
let autoplay = config.autoPlayMedia;
|
||
|
||
// If no global setting is available, fall back on the element's
|
||
// own autoplay setting
|
||
if( typeof autoplay !== 'boolean' ) {
|
||
autoplay = iframe.hasAttribute( 'data-autoplay' ) || !!closestParent( iframe, '.slide-background' );
|
||
}
|
||
|
||
// YouTube postMessage API
|
||
if( /youtube\.com\/embed\//.test( iframe.getAttribute( 'src' ) ) && autoplay ) {
|
||
iframe.contentWindow.postMessage( '{"event":"command","func":"playVideo","args":""}', '*' );
|
||
}
|
||
// Vimeo postMessage API
|
||
else if( /player\.vimeo\.com\//.test( iframe.getAttribute( 'src' ) ) && autoplay ) {
|
||
iframe.contentWindow.postMessage( '{"method":"play"}', '*' );
|
||
}
|
||
// Generic postMessage API
|
||
else {
|
||
iframe.contentWindow.postMessage( 'slide:start', '*' );
|
||
}
|
||
|
||
}
|
||
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Stop playback of any embedded content inside of
|
||
* the targeted slide.
|
||
*
|
||
* @param {HTMLElement} element
|
||
*/
|
||
function stopEmbeddedContent( element, options = {} ) {
|
||
|
||
options = extend( {
|
||
// Defaults
|
||
unloadIframes: true
|
||
}, options );
|
||
|
||
if( element && element.parentNode ) {
|
||
// HTML5 media elements
|
||
toArray( element.querySelectorAll( 'video, audio' ) ).forEach( el => {
|
||
if( !el.hasAttribute( 'data-ignore' ) && typeof el.pause === 'function' ) {
|
||
el.setAttribute('data-paused-by-reveal', '');
|
||
el.pause();
|
||
}
|
||
} );
|
||
|
||
// Generic postMessage API for non-lazy loaded iframes
|
||
toArray( element.querySelectorAll( 'iframe' ) ).forEach( el => {
|
||
if( el.contentWindow ) el.contentWindow.postMessage( 'slide:stop', '*' );
|
||
el.removeEventListener( 'load', startEmbeddedIframe );
|
||
});
|
||
|
||
// YouTube postMessage API
|
||
toArray( element.querySelectorAll( 'iframe[src*="youtube.com/embed/"]' ) ).forEach( el => {
|
||
if( !el.hasAttribute( 'data-ignore' ) && el.contentWindow && typeof el.contentWindow.postMessage === 'function' ) {
|
||
el.contentWindow.postMessage( '{"event":"command","func":"pauseVideo","args":""}', '*' );
|
||
}
|
||
});
|
||
|
||
// Vimeo postMessage API
|
||
toArray( element.querySelectorAll( 'iframe[src*="player.vimeo.com/"]' ) ).forEach( el => {
|
||
if( !el.hasAttribute( 'data-ignore' ) && el.contentWindow && typeof el.contentWindow.postMessage === 'function' ) {
|
||
el.contentWindow.postMessage( '{"method":"pause"}', '*' );
|
||
}
|
||
});
|
||
|
||
if( options.unloadIframes === true ) {
|
||
// Unload lazy-loaded iframes
|
||
toArray( element.querySelectorAll( 'iframe[data-src]' ) ).forEach( el => {
|
||
// Only removing the src doesn't actually unload the frame
|
||
// in all browsers (Firefox) so we set it to blank first
|
||
el.setAttribute( 'src', 'about:blank' );
|
||
el.removeAttribute( 'src' );
|
||
} );
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* 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 );
|
||
|
||
}
|
||
|
||
/**
|
||
* Checks if this presentation is running inside of the
|
||
* speaker notes window.
|
||
*
|
||
* @return {boolean}
|
||
*/
|
||
function isSpeakerNotes() {
|
||
|
||
return !!window.location.search.match( /receiver/gi );
|
||
|
||
}
|
||
|
||
/**
|
||
* Reads the current URL (hash) and navigates accordingly.
|
||
*/
|
||
function readURL() {
|
||
|
||
let hash = window.location.hash;
|
||
|
||
// Attempt to parse the hash as either an index or name
|
||
let bits = hash.slice( 2 ).split( '/' ),
|
||
name = hash.replace( /#|\//gi, '' );
|
||
|
||
// If the first bit is not fully numeric and there is a name we
|
||
// can assume that this is a named link
|
||
if( !/^[0-9]*$/.test( bits[0] ) && name.length ) {
|
||
let element;
|
||
|
||
// Ensure the named link is a valid HTML ID attribute
|
||
try {
|
||
element = document.getElementById( decodeURIComponent( name ) );
|
||
}
|
||
catch ( error ) { }
|
||
|
||
// Ensure that we're not already on a slide with the same name
|
||
let isSameNameAsCurrentSlide = currentSlide ? currentSlide.getAttribute( 'id' ) === name : false;
|
||
|
||
if( element ) {
|
||
// If the slide exists and is not the current slide...
|
||
if ( !isSameNameAsCurrentSlide ) {
|
||
// ...find the position of the named slide and navigate to it
|
||
let indices = Reveal.getIndices(element);
|
||
slide(indices.h, indices.v);
|
||
}
|
||
}
|
||
// If the slide doesn't exist, navigate to the current slide
|
||
else {
|
||
slide( indexh || 0, indexv || 0 );
|
||
}
|
||
}
|
||
else {
|
||
let hashIndexBase = config.hashOneBasedIndex ? 1 : 0;
|
||
|
||
// Read the index components of the hash
|
||
let h = ( parseInt( bits[0], 10 ) - hashIndexBase ) || 0,
|
||
v = ( parseInt( bits[1], 10 ) - hashIndexBase ) || 0,
|
||
f;
|
||
|
||
if( config.fragmentInURL ) {
|
||
f = parseInt( bits[2], 10 );
|
||
if( isNaN( f ) ) {
|
||
f = undefined;
|
||
}
|
||
}
|
||
|
||
if( h !== indexh || v !== indexv || f !== undefined ) {
|
||
slide( h, v, f );
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Updates the page URL (hash) to reflect the current
|
||
* state.
|
||
*
|
||
* @param {number} delay The time in ms to wait before
|
||
* writing the hash
|
||
*/
|
||
function writeURL( delay ) {
|
||
|
||
// Make sure there's never more than one timeout running
|
||
clearTimeout( writeURLTimeout );
|
||
|
||
// If a delay is specified, timeout this call
|
||
if( typeof delay === 'number' ) {
|
||
writeURLTimeout = setTimeout( writeURL, delay );
|
||
}
|
||
else if( currentSlide ) {
|
||
// If we're configured to push to history OR the history
|
||
// API is not avaialble.
|
||
if( config.history || !window.history ) {
|
||
window.location.hash = locationHash();
|
||
}
|
||
// If we're configured to reflect the current slide in the
|
||
// URL without pushing to history.
|
||
else if( config.hash ) {
|
||
window.history.replaceState( null, null, '#' + locationHash() );
|
||
}
|
||
// If history and hash are both disabled, a hash may still
|
||
// be added to the URL by clicking on a href with a hash
|
||
// target. Counter this by always removing the hash.
|
||
else {
|
||
window.history.replaceState( null, null, window.location.pathname + window.location.search );
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Retrieves the h/v location and fragment of the current,
|
||
* or specified, slide.
|
||
*
|
||
* @param {HTMLElement} [slide] If specified, the returned
|
||
* index will be for this slide rather than the currently
|
||
* active one
|
||
*
|
||
* @return {{h: number, v: number, f: number}}
|
||
*/
|
||
function getIndices( slide ) {
|
||
|
||
// By default, return the current indices
|
||
let h = indexh,
|
||
v = indexv,
|
||
f;
|
||
|
||
// If a slide is specified, return the indices of that slide
|
||
if( slide ) {
|
||
let isVertical = isVerticalSlide( slide );
|
||
let slideh = isVertical ? slide.parentNode : slide;
|
||
|
||
// Select all horizontal slides
|
||
let horizontalSlides = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) );
|
||
|
||
// Now that we know which the horizontal slide is, get its index
|
||
h = Math.max( horizontalSlides.indexOf( slideh ), 0 );
|
||
|
||
// Assume we're not vertical
|
||
v = undefined;
|
||
|
||
// If this is a vertical slide, grab the vertical index
|
||
if( isVertical ) {
|
||
v = Math.max( toArray( slide.parentNode.querySelectorAll( 'section' ) ).indexOf( slide ), 0 );
|
||
}
|
||
}
|
||
|
||
if( !slide && currentSlide ) {
|
||
let hasFragments = currentSlide.querySelectorAll( '.fragment' ).length > 0;
|
||
if( hasFragments ) {
|
||
let currentFragment = currentSlide.querySelector( '.current-fragment' );
|
||
if( currentFragment && currentFragment.hasAttribute( 'data-fragment-index' ) ) {
|
||
f = parseInt( currentFragment.getAttribute( 'data-fragment-index' ), 10 );
|
||
}
|
||
else {
|
||
f = currentSlide.querySelectorAll( '.fragment.visible' ).length - 1;
|
||
}
|
||
}
|
||
}
|
||
|
||
return { h, v, f };
|
||
|
||
}
|
||
|
||
/**
|
||
* Retrieves all slides in this presentation.
|
||
*/
|
||
function getSlides() {
|
||
|
||
return toArray( dom.wrapper.querySelectorAll( SLIDES_SELECTOR + ':not(.stack):not([data-visibility="uncounted"])' ) );
|
||
|
||
}
|
||
|
||
/**
|
||
* Returns a list of all horizontal slides in the deck. Each
|
||
* vertical stack is included as one horizontal slide in the
|
||
* resulting array.
|
||
*/
|
||
function getHorizontalSlides() {
|
||
|
||
return toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) );
|
||
|
||
}
|
||
|
||
/**
|
||
* Returns all vertical slides that exist within this deck.
|
||
*/
|
||
function getVerticalSlides() {
|
||
|
||
return toArray( dom.wrapper.querySelectorAll( '.slides>section>section' ) );
|
||
|
||
}
|
||
|
||
/**
|
||
* Returns all vertical stacks (each stack can contain multiple slides).
|
||
*/
|
||
function getVerticalStacks() {
|
||
|
||
return toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR + '.stack') );
|
||
|
||
}
|
||
|
||
/**
|
||
* Returns true if there are at least two horizontal slides.
|
||
*/
|
||
function hasHorizontalSlides() {
|
||
|
||
return getHorizontalSlides().length > 1;
|
||
}
|
||
|
||
/**
|
||
* Returns true if there are at least two vertical slides.
|
||
*/
|
||
function hasVerticalSlides() {
|
||
|
||
return getVerticalSlides().length > 1;
|
||
|
||
}
|
||
|
||
/**
|
||
* Returns an array of objects where each object represents the
|
||
* attributes on its respective slide.
|
||
*/
|
||
function getSlidesAttributes() {
|
||
|
||
return getSlides().map( slide => {
|
||
|
||
let attributes = {};
|
||
for( let i = 0; i < slide.attributes.length; i++ ) {
|
||
let attribute = slide.attributes[ i ];
|
||
attributes[ attribute.name ] = attribute.value;
|
||
}
|
||
return attributes;
|
||
|
||
} );
|
||
|
||
}
|
||
|
||
/**
|
||
* Retrieves the total number of slides in this presentation.
|
||
*
|
||
* @return {number}
|
||
*/
|
||
function getTotalSlides() {
|
||
|
||
return getSlides().length;
|
||
|
||
}
|
||
|
||
/**
|
||
* Returns the slide element matching the specified index.
|
||
*
|
||
* @return {HTMLElement}
|
||
*/
|
||
function getSlide( x, y ) {
|
||
|
||
let horizontalSlide = getHorizontalSlides()[ x ];
|
||
let verticalSlides = horizontalSlide && horizontalSlide.querySelectorAll( 'section' );
|
||
|
||
if( verticalSlides && verticalSlides.length && typeof y === 'number' ) {
|
||
return verticalSlides ? verticalSlides[ y ] : undefined;
|
||
}
|
||
|
||
return horizontalSlide;
|
||
|
||
}
|
||
|
||
/**
|
||
* Returns the background element for the given slide.
|
||
* All slides, even the ones with no background properties
|
||
* defined, have a background element so as long as the
|
||
* index is valid an element will be returned.
|
||
*
|
||
* @param {mixed} x Horizontal background index OR a slide
|
||
* HTML element
|
||
* @param {number} y Vertical background index
|
||
* @return {(HTMLElement[]|*)}
|
||
*/
|
||
function getSlideBackground( x, y ) {
|
||
|
||
let slide = typeof x === 'number' ? getSlide( x, y ) : x;
|
||
if( slide ) {
|
||
return slide.slideBackgroundElement;
|
||
}
|
||
|
||
return undefined;
|
||
|
||
}
|
||
|
||
/**
|
||
* Retrieves the speaker notes from a slide. Notes can be
|
||
* defined in two ways:
|
||
* 1. As a data-notes attribute on the slide <section>
|
||
* 2. As an <aside class="notes"> inside of the slide
|
||
*
|
||
* @param {HTMLElement} [slide=currentSlide]
|
||
* @return {(string|null)}
|
||
*/
|
||
function getSlideNotes( slide = currentSlide ) {
|
||
|
||
// Notes can be specified via the data-notes attribute...
|
||
if( slide.hasAttribute( 'data-notes' ) ) {
|
||
return slide.getAttribute( 'data-notes' );
|
||
}
|
||
|
||
// ... or using an <aside class="notes"> element
|
||
let notesElement = slide.querySelector( 'aside.notes' );
|
||
if( notesElement ) {
|
||
return notesElement.innerHTML;
|
||
}
|
||
|
||
return null;
|
||
|
||
}
|
||
|
||
/**
|
||
* 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: isOverview()
|
||
};
|
||
|
||
}
|
||
|
||
/**
|
||
* Restores the presentation to the given state.
|
||
*
|
||
* @param {object} state As generated by getState()
|
||
* @see {@link getState} generates the parameter `state`
|
||
*/
|
||
function setState( state ) {
|
||
|
||
if( typeof state === 'object' ) {
|
||
slide( deserialize( state.indexh ), deserialize( state.indexv ), deserialize( state.indexf ) );
|
||
|
||
let pausedFlag = deserialize( state.paused ),
|
||
overviewFlag = deserialize( state.overview );
|
||
|
||
if( typeof pausedFlag === 'boolean' && pausedFlag !== isPaused() ) {
|
||
togglePause( pausedFlag );
|
||
}
|
||
|
||
if( typeof overviewFlag === 'boolean' && overviewFlag !== isOverview() ) {
|
||
toggleOverview( overviewFlag );
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Return a sorted fragments list, ordered by an increasing
|
||
* "data-fragment-index" attribute.
|
||
*
|
||
* Fragments will be revealed in the order that they are returned by
|
||
* this function, so you can use the index attributes to control the
|
||
* order of fragment appearance.
|
||
*
|
||
* To maintain a sensible default fragment order, fragments are presumed
|
||
* to be passed in document order. This function adds a "fragment-index"
|
||
* attribute to each node if such an attribute is not already present,
|
||
* and sets that attribute to an integer value which is the position of
|
||
* the fragment within the fragments list.
|
||
*
|
||
* @param {object[]|*} fragments
|
||
* @param {boolean} grouped If true the returned array will contain
|
||
* nested arrays for all fragments with the same index
|
||
* @return {object[]} sorted Sorted array of fragments
|
||
*/
|
||
function sortFragments( fragments, grouped = false ) {
|
||
|
||
fragments = toArray( fragments );
|
||
|
||
let ordered = [],
|
||
unordered = [],
|
||
sorted = [];
|
||
|
||
// Group ordered and unordered elements
|
||
fragments.forEach( fragment => {
|
||
if( fragment.hasAttribute( 'data-fragment-index' ) ) {
|
||
let index = parseInt( fragment.getAttribute( 'data-fragment-index' ), 10 );
|
||
|
||
if( !ordered[index] ) {
|
||
ordered[index] = [];
|
||
}
|
||
|
||
ordered[index].push( fragment );
|
||
}
|
||
else {
|
||
unordered.push( [ fragment ] );
|
||
}
|
||
} );
|
||
|
||
// Append fragments without explicit indices in their
|
||
// DOM order
|
||
ordered = ordered.concat( unordered );
|
||
|
||
// Manually count the index up per group to ensure there
|
||
// are no gaps
|
||
let index = 0;
|
||
|
||
// Push all fragments in their sorted order to an array,
|
||
// this flattens the groups
|
||
ordered.forEach( group => {
|
||
group.forEach( fragment => {
|
||
sorted.push( fragment );
|
||
fragment.setAttribute( 'data-fragment-index', index );
|
||
} );
|
||
|
||
index ++;
|
||
} );
|
||
|
||
return grouped === true ? ordered : sorted;
|
||
|
||
}
|
||
|
||
/**
|
||
* Refreshes the fragments on the current slide so that they
|
||
* have the appropriate classes (.visible + .current-fragment).
|
||
*
|
||
* @param {number} [index] The index of the current fragment
|
||
* @param {array} [fragments] Array containing all fragments
|
||
* in the current slide
|
||
*
|
||
* @return {{shown: array, hidden: array}}
|
||
*/
|
||
function updateFragments( index, fragments ) {
|
||
|
||
let changedFragments = {
|
||
shown: [],
|
||
hidden: []
|
||
};
|
||
|
||
if( currentSlide && config.fragments ) {
|
||
|
||
fragments = fragments || sortFragments( currentSlide.querySelectorAll( '.fragment' ) );
|
||
|
||
if( fragments.length ) {
|
||
|
||
let maxIndex = 0;
|
||
|
||
if( typeof index !== 'number' ) {
|
||
let currentFragment = sortFragments( currentSlide.querySelectorAll( '.fragment.visible' ) ).pop();
|
||
if( currentFragment ) {
|
||
index = parseInt( currentFragment.getAttribute( 'data-fragment-index' ) || 0, 10 );
|
||
}
|
||
}
|
||
|
||
toArray( fragments ).forEach( ( el, i ) => {
|
||
|
||
if( el.hasAttribute( 'data-fragment-index' ) ) {
|
||
i = parseInt( el.getAttribute( 'data-fragment-index' ), 10 );
|
||
}
|
||
|
||
maxIndex = Math.max( maxIndex, i );
|
||
|
||
// Visible fragments
|
||
if( i <= index ) {
|
||
if( !el.classList.contains( 'visible' ) ) changedFragments.shown.push( el );
|
||
el.classList.add( 'visible' );
|
||
el.classList.remove( 'current-fragment' );
|
||
|
||
// Announce the fragments one by one to the Screen Reader
|
||
dom.statusDiv.textContent = getStatusText( el );
|
||
|
||
if( i === index ) {
|
||
el.classList.add( 'current-fragment' );
|
||
startEmbeddedContent( el );
|
||
}
|
||
}
|
||
// Hidden fragments
|
||
else {
|
||
if( el.classList.contains( 'visible' ) ) changedFragments.hidden.push( el );
|
||
el.classList.remove( 'visible' );
|
||
el.classList.remove( 'current-fragment' );
|
||
}
|
||
|
||
} );
|
||
|
||
// Write the current fragment index to the slide <section>.
|
||
// This can be used by end users to apply styles based on
|
||
// the current fragment index.
|
||
index = typeof index === 'number' ? index : -1;
|
||
index = Math.max( Math.min( index, maxIndex ), -1 );
|
||
currentSlide.setAttribute( 'data-fragment', index );
|
||
|
||
}
|
||
|
||
}
|
||
|
||
return changedFragments;
|
||
|
||
}
|
||
|
||
/**
|
||
* Navigate to the specified slide fragment.
|
||
*
|
||
* @param {?number} index The index of the fragment that
|
||
* should be shown, -1 means all are invisible
|
||
* @param {number} offset Integer offset to apply to the
|
||
* fragment index
|
||
*
|
||
* @return {boolean} true if a change was made in any
|
||
* fragments visibility as part of this call
|
||
*/
|
||
function navigateFragment( index, offset = 0 ) {
|
||
|
||
if( currentSlide && config.fragments ) {
|
||
|
||
let fragments = sortFragments( currentSlide.querySelectorAll( '.fragment' ) );
|
||
if( fragments.length ) {
|
||
|
||
// If no index is specified, find the current
|
||
if( typeof index !== 'number' ) {
|
||
let lastVisibleFragment = sortFragments( currentSlide.querySelectorAll( '.fragment.visible' ) ).pop();
|
||
|
||
if( lastVisibleFragment ) {
|
||
index = parseInt( lastVisibleFragment.getAttribute( 'data-fragment-index' ) || 0, 10 );
|
||
}
|
||
else {
|
||
index = -1;
|
||
}
|
||
}
|
||
|
||
// Apply the offset if there is one
|
||
index += offset;
|
||
|
||
let changedFragments = updateFragments( index, fragments );
|
||
|
||
if( changedFragments.hidden.length ) {
|
||
dispatchEvent( 'fragmenthidden', { fragment: changedFragments.hidden[0], fragments: changedFragments.hidden } );
|
||
}
|
||
|
||
if( changedFragments.shown.length ) {
|
||
dispatchEvent( 'fragmentshown', { fragment: changedFragments.shown[0], fragments: changedFragments.shown } );
|
||
}
|
||
|
||
updateControls();
|
||
updateProgress();
|
||
|
||
if( config.fragmentInURL ) {
|
||
writeURL();
|
||
}
|
||
|
||
return !!( changedFragments.shown.length || changedFragments.hidden.length );
|
||
|
||
}
|
||
|
||
}
|
||
|
||
return false;
|
||
|
||
}
|
||
|
||
/**
|
||
* Navigate to the next slide fragment.
|
||
*
|
||
* @return {boolean} true if there was a next fragment,
|
||
* false otherwise
|
||
*/
|
||
function nextFragment() {
|
||
|
||
return navigateFragment( null, 1 );
|
||
|
||
}
|
||
|
||
/**
|
||
* Navigate to the previous slide fragment.
|
||
*
|
||
* @return {boolean} true if there was a previous fragment,
|
||
* false otherwise
|
||
*/
|
||
function prevFragment() {
|
||
|
||
return navigateFragment( null, -1 );
|
||
|
||
}
|
||
|
||
/**
|
||
* Cues a new automated slide if enabled in the config.
|
||
*/
|
||
function cueAutoSlide() {
|
||
|
||
cancelAutoSlide();
|
||
|
||
if( currentSlide && config.autoSlide !== false ) {
|
||
|
||
let fragment = currentSlide.querySelector( '.current-fragment' );
|
||
|
||
// When the slide first appears there is no "current" fragment so
|
||
// we look for a data-autoslide timing on the first fragment
|
||
if( !fragment ) fragment = currentSlide.querySelector( '.fragment' );
|
||
|
||
let fragmentAutoSlide = fragment ? fragment.getAttribute( 'data-autoslide' ) : null;
|
||
let parentAutoSlide = currentSlide.parentNode ? currentSlide.parentNode.getAttribute( 'data-autoslide' ) : null;
|
||
let slideAutoSlide = currentSlide.getAttribute( 'data-autoslide' );
|
||
|
||
// Pick value in the following priority order:
|
||
// 1. Current fragment's data-autoslide
|
||
// 2. Current slide's data-autoslide
|
||
// 3. Parent slide's data-autoslide
|
||
// 4. Global autoSlide setting
|
||
if( fragmentAutoSlide ) {
|
||
autoSlide = parseInt( fragmentAutoSlide, 10 );
|
||
}
|
||
else if( slideAutoSlide ) {
|
||
autoSlide = parseInt( slideAutoSlide, 10 );
|
||
}
|
||
else if( parentAutoSlide ) {
|
||
autoSlide = parseInt( parentAutoSlide, 10 );
|
||
}
|
||
else {
|
||
autoSlide = config.autoSlide;
|
||
}
|
||
|
||
// If there are media elements with data-autoplay,
|
||
// automatically set the autoSlide duration to the
|
||
// length of that media. Not applicable if the slide
|
||
// is divided up into fragments.
|
||
// playbackRate is accounted for in the duration.
|
||
if( currentSlide.querySelectorAll( '.fragment' ).length === 0 ) {
|
||
toArray( currentSlide.querySelectorAll( 'video, audio' ) ).forEach( el => {
|
||
if( el.hasAttribute( 'data-autoplay' ) ) {
|
||
if( autoSlide && (el.duration * 1000 / el.playbackRate ) > autoSlide ) {
|
||
autoSlide = ( el.duration * 1000 / el.playbackRate ) + 1000;
|
||
}
|
||
}
|
||
} );
|
||
}
|
||
|
||
// Cue the next auto-slide if:
|
||
// - There is an autoSlide value
|
||
// - Auto-sliding isn't paused by the user
|
||
// - The presentation isn't paused
|
||
// - The overview isn't active
|
||
// - The presentation isn't over
|
||
if( autoSlide && !autoSlidePaused && !isPaused() && !isOverview() && ( !Reveal.isLastSlide() || availableFragments().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( 'autoslidepaused' );
|
||
clearTimeout( autoSlideTimeout );
|
||
|
||
if( autoSlidePlayer ) {
|
||
autoSlidePlayer.setPlaying( false );
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
function resumeAutoSlide() {
|
||
|
||
if( autoSlide && autoSlidePaused ) {
|
||
autoSlidePaused = false;
|
||
dispatchEvent( 'autoslideresumed' );
|
||
cueAutoSlide();
|
||
}
|
||
|
||
}
|
||
|
||
function navigateLeft() {
|
||
|
||
hasNavigatedHorizontally = true;
|
||
|
||
// Reverse for RTL
|
||
if( config.rtl ) {
|
||
if( ( isOverview() || nextFragment() === false ) && availableRoutes().left ) {
|
||
slide( indexh + 1, config.navigationMode === 'grid' ? indexv : undefined );
|
||
}
|
||
}
|
||
// Normal navigation
|
||
else if( ( isOverview() || prevFragment() === false ) && availableRoutes().left ) {
|
||
slide( indexh - 1, config.navigationMode === 'grid' ? indexv : undefined );
|
||
}
|
||
|
||
}
|
||
|
||
function navigateRight() {
|
||
|
||
hasNavigatedHorizontally = true;
|
||
|
||
// Reverse for RTL
|
||
if( config.rtl ) {
|
||
if( ( isOverview() || prevFragment() === false ) && availableRoutes().right ) {
|
||
slide( indexh - 1, config.navigationMode === 'grid' ? indexv : undefined );
|
||
}
|
||
}
|
||
// Normal navigation
|
||
else if( ( isOverview() || nextFragment() === false ) && availableRoutes().right ) {
|
||
slide( indexh + 1, config.navigationMode === 'grid' ? indexv : undefined );
|
||
}
|
||
|
||
}
|
||
|
||
function navigateUp() {
|
||
|
||
// Prioritize hiding fragments
|
||
if( ( isOverview() || prevFragment() === false ) && availableRoutes().up ) {
|
||
slide( indexh, indexv - 1 );
|
||
}
|
||
|
||
}
|
||
|
||
function navigateDown() {
|
||
|
||
hasNavigatedVertically = true;
|
||
|
||
// Prioritize revealing fragments
|
||
if( ( isOverview() || nextFragment() === false ) && availableRoutes().down ) {
|
||
slide( indexh, indexv + 1 );
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Navigates backwards, prioritized in the following order:
|
||
* 1) Previous fragment
|
||
* 2) Previous vertical slide
|
||
* 3) Previous horizontal slide
|
||
*/
|
||
function navigatePrev() {
|
||
|
||
// Prioritize revealing fragments
|
||
if( prevFragment() === false ) {
|
||
if( availableRoutes().up ) {
|
||
navigateUp();
|
||
}
|
||
else {
|
||
// Fetch the previous horizontal slide, if there is one
|
||
let previousSlide;
|
||
|
||
if( config.rtl ) {
|
||
previousSlide = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR + '.future' ) ).pop();
|
||
}
|
||
else {
|
||
previousSlide = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR + '.past' ) ).pop();
|
||
}
|
||
|
||
if( previousSlide ) {
|
||
let v = ( previousSlide.querySelectorAll( 'section' ).length - 1 ) || undefined;
|
||
let h = indexh - 1;
|
||
slide( h, v );
|
||
}
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* The reverse of #navigatePrev().
|
||
*/
|
||
function navigateNext() {
|
||
|
||
hasNavigatedHorizontally = true;
|
||
hasNavigatedVertically = true;
|
||
|
||
// Prioritize revealing fragments
|
||
if( nextFragment() === 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 && Reveal.isLastVerticalSlide( currentSlide ) ) {
|
||
routes.down = false;
|
||
}
|
||
|
||
if( routes.down ) {
|
||
navigateDown();
|
||
}
|
||
else if( config.rtl ) {
|
||
navigateLeft();
|
||
}
|
||
else {
|
||
navigateRight();
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Checks if the target element prevents the triggering of
|
||
* swipe navigation.
|
||
*/
|
||
function isSwipePrevented( target ) {
|
||
|
||
while( target && typeof target.hasAttribute === 'function' ) {
|
||
if( target.hasAttribute( 'data-prevent-swipe' ) ) return true;
|
||
target = target.parentNode;
|
||
}
|
||
|
||
return false;
|
||
|
||
}
|
||
|
||
|
||
// --------------------------------------------------------------------//
|
||
// ----------------------------- EVENTS -------------------------------//
|
||
// --------------------------------------------------------------------//
|
||
|
||
/**
|
||
* Called by all event handlers that are based on user
|
||
* input.
|
||
*
|
||
* @param {object} [event]
|
||
*/
|
||
function onUserInput( event ) {
|
||
|
||
if( config.autoSlideStoppable ) {
|
||
pauseAutoSlide();
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Called whenever there is mouse input at the document level
|
||
* to determine if the cursor is active or not.
|
||
*
|
||
* @param {object} event
|
||
*/
|
||
function onDocumentCursorActive( event ) {
|
||
|
||
showCursor();
|
||
|
||
clearTimeout( cursorInactiveTimeout );
|
||
|
||
cursorInactiveTimeout = setTimeout( hideCursor, config.hideCursorTime );
|
||
|
||
}
|
||
|
||
/**
|
||
* Handler for the document level 'keypress' event.
|
||
*
|
||
* @param {object} event
|
||
*/
|
||
function onDocumentKeyPress( event ) {
|
||
|
||
// Check if the pressed key is question mark
|
||
if( event.shiftKey && event.charCode === 63 ) {
|
||
toggleHelp();
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Handler for the document level 'keydown' event.
|
||
*
|
||
* @param {object} event
|
||
*/
|
||
function onDocumentKeyDown( event ) {
|
||
|
||
// If there's a condition specified and it returns false,
|
||
// ignore this event
|
||
if( typeof config.keyboardCondition === 'function' && config.keyboardCondition(event) === false ) {
|
||
return true;
|
||
}
|
||
|
||
// Shorthand
|
||
let keyCode = event.keyCode;
|
||
|
||
// Remember if auto-sliding was paused so we can toggle it
|
||
let autoSlideWasPaused = autoSlidePaused;
|
||
|
||
onUserInput( event );
|
||
|
||
// Is there a focused element that could be using the keyboard?
|
||
let activeElementIsCE = document.activeElement && document.activeElement.contentEditable !== 'inherit';
|
||
let activeElementIsInput = document.activeElement && document.activeElement.tagName && /input|textarea/i.test( document.activeElement.tagName );
|
||
let activeElementIsNotes = document.activeElement && document.activeElement.className && /speaker-notes/i.test( document.activeElement.className);
|
||
|
||
// Whitelist specific modified + keycode combinations
|
||
let prevSlideShortcut = event.shiftKey && event.keyCode === 32;
|
||
let firstSlideShortcut = event.shiftKey && keyCode === 37;
|
||
let lastSlideShortcut = event.shiftKey && keyCode === 39;
|
||
|
||
// Prevent all other events when a modifier is pressed
|
||
let unusedModifier = !prevSlideShortcut && !firstSlideShortcut && !lastSlideShortcut &&
|
||
( event.shiftKey || event.altKey || event.ctrlKey || event.metaKey );
|
||
|
||
// Disregard the event if there's a focused element or a
|
||
// keyboard modifier key is present
|
||
if( activeElementIsCE || activeElementIsInput || activeElementIsNotes || unusedModifier ) return;
|
||
|
||
// While paused only allow resume keyboard events; 'b', 'v', '.'
|
||
let resumeKeyCodes = [66,86,190,191];
|
||
let key;
|
||
|
||
// Custom key bindings for togglePause should be able to resume
|
||
if( typeof config.keyboard === 'object' ) {
|
||
for( key in config.keyboard ) {
|
||
if( config.keyboard[key] === 'togglePause' ) {
|
||
resumeKeyCodes.push( parseInt( key, 10 ) );
|
||
}
|
||
}
|
||
}
|
||
|
||
if( isPaused() && resumeKeyCodes.indexOf( keyCode ) === -1 ) {
|
||
return false;
|
||
}
|
||
|
||
// Use linear navigation if we're configured to OR if
|
||
// the presentation is one-dimensional
|
||
let useLinearMode = config.navigationMode === 'linear' || !hasHorizontalSlides() || !hasVerticalSlides();
|
||
|
||
let triggered = false;
|
||
|
||
// 1. User defined key bindings
|
||
if( typeof config.keyboard === 'object' ) {
|
||
|
||
for( key in config.keyboard ) {
|
||
|
||
// Check if this binding matches the pressed key
|
||
if( parseInt( key, 10 ) === keyCode ) {
|
||
|
||
let value = config.keyboard[ key ];
|
||
|
||
// Callback function
|
||
if( typeof value === 'function' ) {
|
||
value.apply( null, [ event ] );
|
||
}
|
||
// String shortcuts to reveal.js API
|
||
else if( typeof value === 'string' && typeof Reveal[ value ] === 'function' ) {
|
||
Reveal[ value ].call();
|
||
}
|
||
|
||
triggered = true;
|
||
|
||
}
|
||
|
||
}
|
||
|
||
}
|
||
|
||
// 2. Registered custom key bindings
|
||
if( triggered === false ) {
|
||
|
||
for( key in registeredKeyBindings ) {
|
||
|
||
// Check if this binding matches the pressed key
|
||
if( parseInt( key, 10 ) === keyCode ) {
|
||
|
||
let action = registeredKeyBindings[ key ].callback;
|
||
|
||
// Callback function
|
||
if( typeof action === 'function' ) {
|
||
action.apply( null, [ event ] );
|
||
}
|
||
// String shortcuts to reveal.js API
|
||
else if( typeof action === 'string' && typeof Reveal[ action ] === 'function' ) {
|
||
Reveal[ action ].call();
|
||
}
|
||
|
||
triggered = true;
|
||
}
|
||
}
|
||
}
|
||
|
||
// 3. System defined key bindings
|
||
if( triggered === false ) {
|
||
|
||
// Assume true and try to prove false
|
||
triggered = true;
|
||
|
||
// P, PAGE UP
|
||
if( keyCode === 80 || keyCode === 33 ) {
|
||
navigatePrev();
|
||
}
|
||
// N, PAGE DOWN
|
||
else if( keyCode === 78 || keyCode === 34 ) {
|
||
navigateNext();
|
||
}
|
||
// H, LEFT
|
||
else if( keyCode === 72 || keyCode === 37 ) {
|
||
if( firstSlideShortcut ) {
|
||
slide( 0 );
|
||
}
|
||
else if( !isOverview() && useLinearMode ) {
|
||
navigatePrev();
|
||
}
|
||
else {
|
||
navigateLeft();
|
||
}
|
||
}
|
||
// L, RIGHT
|
||
else if( keyCode === 76 || keyCode === 39 ) {
|
||
if( lastSlideShortcut ) {
|
||
slide( Number.MAX_VALUE );
|
||
}
|
||
else if( !isOverview() && useLinearMode ) {
|
||
navigateNext();
|
||
}
|
||
else {
|
||
navigateRight();
|
||
}
|
||
}
|
||
// K, UP
|
||
else if( keyCode === 75 || keyCode === 38 ) {
|
||
if( !isOverview() && useLinearMode ) {
|
||
navigatePrev();
|
||
}
|
||
else {
|
||
navigateUp();
|
||
}
|
||
}
|
||
// J, DOWN
|
||
else if( keyCode === 74 || keyCode === 40 ) {
|
||
if( !isOverview() && useLinearMode ) {
|
||
navigateNext();
|
||
}
|
||
else {
|
||
navigateDown();
|
||
}
|
||
}
|
||
// HOME
|
||
else if( keyCode === 36 ) {
|
||
slide( 0 );
|
||
}
|
||
// END
|
||
else if( keyCode === 35 ) {
|
||
slide( Number.MAX_VALUE );
|
||
}
|
||
// SPACE
|
||
else if( keyCode === 32 ) {
|
||
if( isOverview() ) {
|
||
deactivateOverview();
|
||
}
|
||
if( event.shiftKey ) {
|
||
navigatePrev();
|
||
}
|
||
else {
|
||
navigateNext();
|
||
}
|
||
}
|
||
// TWO-SPOT, SEMICOLON, B, V, PERIOD, LOGITECH PRESENTER TOOLS "BLACK SCREEN" BUTTON
|
||
else if( keyCode === 58 || keyCode === 59 || keyCode === 66 || keyCode === 86 || keyCode === 190 || keyCode === 191 ) {
|
||
togglePause();
|
||
}
|
||
// F
|
||
else if( keyCode === 70 ) {
|
||
enterFullscreen();
|
||
}
|
||
// A
|
||
else if( keyCode === 65 ) {
|
||
if ( config.autoSlideStoppable ) {
|
||
toggleAutoSlide( autoSlideWasPaused );
|
||
}
|
||
}
|
||
else {
|
||
triggered = false;
|
||
}
|
||
|
||
}
|
||
|
||
// If the input resulted in a triggered action we should prevent
|
||
// the browsers default behavior
|
||
if( triggered ) {
|
||
event.preventDefault && event.preventDefault();
|
||
}
|
||
// ESC or O key
|
||
else if( keyCode === 27 || keyCode === 79 ) {
|
||
if( dom.overlay ) {
|
||
closeOverlay();
|
||
}
|
||
else {
|
||
toggleOverview();
|
||
}
|
||
|
||
event.preventDefault && event.preventDefault();
|
||
}
|
||
|
||
// If auto-sliding is enabled we need to cue up
|
||
// another timeout
|
||
cueAutoSlide();
|
||
|
||
}
|
||
|
||
/**
|
||
* Handler for the 'touchstart' event, enables support for
|
||
* swipe and pinch gestures.
|
||
*
|
||
* @param {object} event
|
||
*/
|
||
function onTouchStart( event ) {
|
||
|
||
if( isSwipePrevented( event.target ) ) return true;
|
||
|
||
touch.startX = event.touches[0].clientX;
|
||
touch.startY = event.touches[0].clientY;
|
||
touch.startCount = event.touches.length;
|
||
|
||
}
|
||
|
||
/**
|
||
* Handler for the 'touchmove' event.
|
||
*
|
||
* @param {object} event
|
||
*/
|
||
function onTouchMove( event ) {
|
||
|
||
if( isSwipePrevented( event.target ) ) return true;
|
||
|
||
// Each touch should only trigger one action
|
||
if( !touch.captured ) {
|
||
onUserInput( event );
|
||
|
||
let currentX = event.touches[0].clientX;
|
||
let currentY = event.touches[0].clientY;
|
||
|
||
// There was only one touch point, look for a swipe
|
||
if( event.touches.length === 1 && touch.startCount !== 2 ) {
|
||
|
||
let deltaX = currentX - touch.startX,
|
||
deltaY = currentY - touch.startY;
|
||
|
||
if( deltaX > touch.threshold && Math.abs( deltaX ) > Math.abs( deltaY ) ) {
|
||
touch.captured = true;
|
||
if( config.navigationMode === 'linear' ) {
|
||
if( config.rtl ) {
|
||
navigateNext();
|
||
}
|
||
else {
|
||
navigatePrev();
|
||
}
|
||
}
|
||
else {
|
||
navigateLeft();
|
||
}
|
||
}
|
||
else if( deltaX < -touch.threshold && Math.abs( deltaX ) > Math.abs( deltaY ) ) {
|
||
touch.captured = true;
|
||
if( config.navigationMode === 'linear' ) {
|
||
if( config.rtl ) {
|
||
navigatePrev();
|
||
}
|
||
else {
|
||
navigateNext();
|
||
}
|
||
}
|
||
else {
|
||
navigateRight();
|
||
}
|
||
}
|
||
else if( deltaY > touch.threshold ) {
|
||
touch.captured = true;
|
||
if( config.navigationMode === 'linear' ) {
|
||
navigatePrev();
|
||
}
|
||
else {
|
||
navigateUp();
|
||
}
|
||
}
|
||
else if( deltaY < -touch.threshold ) {
|
||
touch.captured = true;
|
||
if( config.navigationMode === 'linear' ) {
|
||
navigateNext();
|
||
}
|
||
else {
|
||
navigateDown();
|
||
}
|
||
}
|
||
|
||
// If we're embedded, only block touch events if they have
|
||
// triggered an action
|
||
if( config.embedded ) {
|
||
if( touch.captured || isVerticalSlide( currentSlide ) ) {
|
||
event.preventDefault();
|
||
}
|
||
}
|
||
// Not embedded? Block them all to avoid needless tossing
|
||
// around of the viewport in iOS
|
||
else {
|
||
event.preventDefault();
|
||
}
|
||
|
||
}
|
||
}
|
||
// There's a bug with swiping on some Android devices unless
|
||
// the default action is always prevented
|
||
else if( UA.match( /android/gi ) ) {
|
||
event.preventDefault();
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Handler for the 'touchend' event.
|
||
*
|
||
* @param {object} event
|
||
*/
|
||
function onTouchEnd( event ) {
|
||
|
||
touch.captured = false;
|
||
|
||
}
|
||
|
||
/**
|
||
* Convert pointer down to touch start.
|
||
*
|
||
* @param {object} event
|
||
*/
|
||
function onPointerDown( event ) {
|
||
|
||
if( event.pointerType === event.MSPOINTER_TYPE_TOUCH || event.pointerType === "touch" ) {
|
||
event.touches = [{ clientX: event.clientX, clientY: event.clientY }];
|
||
onTouchStart( event );
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Convert pointer move to touch move.
|
||
*
|
||
* @param {object} event
|
||
*/
|
||
function onPointerMove( event ) {
|
||
|
||
if( event.pointerType === event.MSPOINTER_TYPE_TOUCH || event.pointerType === "touch" ) {
|
||
event.touches = [{ clientX: event.clientX, clientY: event.clientY }];
|
||
onTouchMove( event );
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Convert pointer up to touch end.
|
||
*
|
||
* @param {object} event
|
||
*/
|
||
function onPointerUp( event ) {
|
||
|
||
if( event.pointerType === event.MSPOINTER_TYPE_TOUCH || event.pointerType === "touch" ) {
|
||
event.touches = [{ clientX: event.clientX, clientY: event.clientY }];
|
||
onTouchEnd( event );
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Handles mouse wheel scrolling, throttled to avoid skipping
|
||
* multiple slides.
|
||
*
|
||
* @param {object} event
|
||
*/
|
||
function onDocumentMouseScroll( event ) {
|
||
|
||
if( Date.now() - lastMouseWheelStep > 600 ) {
|
||
|
||
lastMouseWheelStep = Date.now();
|
||
|
||
let delta = event.detail || -event.wheelDelta;
|
||
if( delta > 0 ) {
|
||
navigateNext();
|
||
}
|
||
else if( delta < 0 ) {
|
||
navigatePrev();
|
||
}
|
||
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Clicking on the progress bar results in a navigation to the
|
||
* closest approximate horizontal slide using this equation:
|
||
*
|
||
* ( clickX / presentationWidth ) * numberOfSlides
|
||
*
|
||
* @param {object} event
|
||
*/
|
||
function onProgressClicked( event ) {
|
||
|
||
onUserInput( event );
|
||
|
||
event.preventDefault();
|
||
|
||
let slidesTotal = getHorizontalSlides().length;
|
||
let slideIndex = Math.floor( ( event.clientX / dom.wrapper.offsetWidth ) * slidesTotal );
|
||
|
||
if( config.rtl ) {
|
||
slideIndex = slidesTotal - slideIndex;
|
||
}
|
||
|
||
slide( slideIndex );
|
||
|
||
}
|
||
|
||
/**
|
||
* Event handler for navigation control buttons.
|
||
*/
|
||
function onNavigateLeftClicked( event ) { event.preventDefault(); onUserInput(); config.navigationMode === 'linear' ? navigatePrev() : navigateLeft(); }
|
||
function onNavigateRightClicked( event ) { event.preventDefault(); onUserInput(); config.navigationMode === 'linear' ? navigateNext() : navigateRight(); }
|
||
function onNavigateUpClicked( event ) { event.preventDefault(); onUserInput(); navigateUp(); }
|
||
function onNavigateDownClicked( event ) { event.preventDefault(); onUserInput(); navigateDown(); }
|
||
function onNavigatePrevClicked( event ) { event.preventDefault(); onUserInput(); navigatePrev(); }
|
||
function onNavigateNextClicked( event ) { event.preventDefault(); onUserInput(); navigateNext(); }
|
||
|
||
/**
|
||
* Handler for the window level 'hashchange' event.
|
||
*
|
||
* @param {object} [event]
|
||
*/
|
||
function onWindowHashChange( event ) {
|
||
|
||
readURL();
|
||
|
||
}
|
||
|
||
/**
|
||
* Handler for the window level 'resize' event.
|
||
*
|
||
* @param {object} [event]
|
||
*/
|
||
function onWindowResize( event ) {
|
||
|
||
layout();
|
||
|
||
}
|
||
|
||
/**
|
||
* Handle for the window level 'visibilitychange' event.
|
||
*
|
||
* @param {object} [event]
|
||
*/
|
||
function onPageVisibilityChange( event ) {
|
||
|
||
// If, after clicking a link or similar and we're coming back,
|
||
// focus the document.body to ensure we can use keyboard shortcuts
|
||
if( document.hidden === false && document.activeElement !== document.body ) {
|
||
// Not all elements support .blur() - SVGs among them.
|
||
if( typeof document.activeElement.blur === 'function' ) {
|
||
document.activeElement.blur();
|
||
}
|
||
document.body.focus();
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Invoked when a slide is and we're in the overview.
|
||
*
|
||
* @param {object} event
|
||
*/
|
||
function onOverviewSlideClicked( event ) {
|
||
|
||
// TODO There's a bug here where the event listeners are not
|
||
// removed after deactivating the overview.
|
||
if( eventsAreBound && isOverview() ) {
|
||
event.preventDefault();
|
||
|
||
let element = event.target;
|
||
|
||
while( element && !element.nodeName.match( /section/gi ) ) {
|
||
element = element.parentNode;
|
||
}
|
||
|
||
if( element && !element.classList.contains( 'disabled' ) ) {
|
||
|
||
deactivateOverview();
|
||
|
||
if( element.nodeName.match( /section/gi ) ) {
|
||
let h = parseInt( element.getAttribute( 'data-index-h' ), 10 ),
|
||
v = parseInt( element.getAttribute( 'data-index-v' ), 10 );
|
||
|
||
slide( h, v );
|
||
}
|
||
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* 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( Reveal.isLastSlide() && config.loop === false ) {
|
||
slide( 0, 0 );
|
||
resumeAutoSlide();
|
||
}
|
||
// Resume
|
||
else if( autoSlidePaused ) {
|
||
resumeAutoSlide();
|
||
}
|
||
// Pause
|
||
else {
|
||
pauseAutoSlide();
|
||
}
|
||
|
||
}
|
||
|
||
|
||
// --------------------------------------------------------------------//
|
||
// ------------------------------- API --------------------------------//
|
||
// --------------------------------------------------------------------//
|
||
|
||
|
||
Reveal = {
|
||
VERSION: VERSION,
|
||
|
||
configure,
|
||
|
||
sync,
|
||
syncSlide,
|
||
syncFragments,
|
||
|
||
// Navigation methods
|
||
slide,
|
||
left: navigateLeft,
|
||
right: navigateRight,
|
||
up: navigateUp,
|
||
down: navigateDown,
|
||
prev: navigatePrev,
|
||
next: navigateNext,
|
||
|
||
// Deprecated aliases
|
||
navigateTo: slide,
|
||
navigateLeft: navigateLeft,
|
||
navigateRight: navigateRight,
|
||
navigateUp: navigateUp,
|
||
navigateDown: navigateDown,
|
||
navigatePrev: navigatePrev,
|
||
navigateNext: navigateNext,
|
||
|
||
// Fragment methods
|
||
navigateFragment,
|
||
prevFragment,
|
||
nextFragment,
|
||
|
||
// 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,
|
||
|
||
// Toggles a help overlay with keyboard shortcuts
|
||
toggleHelp,
|
||
|
||
// Toggles the overview mode on/off
|
||
toggleOverview,
|
||
|
||
// Toggles the "black screen" mode on/off
|
||
togglePause,
|
||
|
||
// Toggles the auto slide mode on/off
|
||
toggleAutoSlide,
|
||
|
||
// State checks
|
||
isOverview,
|
||
isPaused,
|
||
isAutoSliding,
|
||
isSpeakerNotes,
|
||
|
||
// Slide preloading
|
||
loadSlide,
|
||
unloadSlide,
|
||
|
||
// Adds or removes all internal event listeners (such as keyboard)
|
||
addEventListeners,
|
||
removeEventListeners,
|
||
|
||
// Facility for persisting and restoring the presentation state
|
||
getState,
|
||
setState,
|
||
|
||
// Presentation progress
|
||
getSlidePastCount,
|
||
|
||
// Presentation progress on range of 0-1
|
||
getProgress,
|
||
|
||
// Returns the indices of the current, or specified, slide
|
||
getIndices,
|
||
|
||
// Returns an Array of all slides
|
||
getSlides,
|
||
|
||
// Returns an Array of objects representing the attributes on
|
||
// the slides
|
||
getSlidesAttributes,
|
||
|
||
// Returns the total number of slides
|
||
getTotalSlides,
|
||
|
||
// Returns the slide element at the specified index
|
||
getSlide,
|
||
|
||
// Returns the slide background element at the specified index
|
||
getSlideBackground,
|
||
|
||
// Returns the speaker notes string for a slide, or null
|
||
getSlideNotes,
|
||
|
||
// Returns an array with all horizontal/vertical slides in the deck
|
||
getHorizontalSlides,
|
||
getVerticalSlides,
|
||
|
||
// Checks if the presentation contains two or more
|
||
// horizontal/vertical slides
|
||
hasHorizontalSlides,
|
||
hasVerticalSlides,
|
||
|
||
// Adds/removes a custom key binding
|
||
addKeyBinding,
|
||
removeKeyBinding,
|
||
|
||
// API for registering and retrieving plugins
|
||
registerPlugin,
|
||
hasPlugin,
|
||
getPlugin,
|
||
|
||
getComputedSlideSize,
|
||
|
||
// Returns the previous slide element, may be null
|
||
getPreviousSlide: () => previousSlide,
|
||
|
||
// Returns the current slide element
|
||
getCurrentSlide: () => currentSlide,
|
||
|
||
// Returns the current scale of the presentation content
|
||
getScale: () => scale,
|
||
|
||
// Returns the current configuration object
|
||
getConfig: () => config,
|
||
|
||
// Helper method, retrieves query string as a key/value hash
|
||
getQueryHash: () => {
|
||
let query = {};
|
||
|
||
location.search.replace( /[A-Z0-9]+?=([\w\.%-]*)/gi, a => {
|
||
query[ a.split( '=' ).shift() ] = a.split( '=' ).pop();
|
||
} );
|
||
|
||
// Basic deserialization
|
||
for( let i in query ) {
|
||
let value = query[ i ];
|
||
|
||
query[ i ] = deserialize( unescape( value ) );
|
||
}
|
||
|
||
return query;
|
||
},
|
||
|
||
// Returns the top-level DOM element
|
||
getRevealElement: () => dom.wrapper || document.querySelector( '.reveal' ),
|
||
|
||
// Returns a hash with all registered plugins
|
||
getPlugins: () => plugins,
|
||
|
||
// Returns true if we're currently on the first slide
|
||
isFirstSlide: () => indexh === 0 && indexv === 0,
|
||
|
||
// Returns true if we're currently on the last slide
|
||
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;
|
||
},
|
||
|
||
// Returns true if we're on the last slide in the current
|
||
// vertical stack
|
||
isLastVerticalSlide: () => {
|
||
if( currentSlide && isVerticalSlide( currentSlide ) ) {
|
||
// Does this slide have a next sibling?
|
||
if( currentSlide.nextElementSibling ) return false;
|
||
|
||
return true;
|
||
}
|
||
|
||
return false;
|
||
},
|
||
|
||
// Checks if reveal.js has been loaded and is ready for use
|
||
isReady: () => loaded,
|
||
|
||
// Forward event binding to the reveal DOM element
|
||
addEventListener: ( type, listener, useCapture ) => {
|
||
Reveal.getRevealElement().addEventListener( type, listener, useCapture );
|
||
},
|
||
removeEventListener: ( type, listener, useCapture ) => {
|
||
Reveal.getRevealElement().removeEventListener( type, listener, useCapture );
|
||
},
|
||
|
||
// Programmatically triggers a keyboard event
|
||
triggerKey: keyCode => onDocumentKeyDown( { keyCode } ),
|
||
|
||
// Registers a new shortcut to include in the help overlay
|
||
registerKeyboardShortcut: ( key, value ) => keyboardShortcuts[key] = value
|
||
};
|
||
|
||
return init();
|
||
|
||
}; |