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+/*!
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+ * reveal.js
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+ * http://lab.hakim.se/reveal-js
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+ * MIT licensed
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+ *
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+ * Copyright (C) 2011-2012 Hakim El Hattab, http://hakim.se
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+ */
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+var Reveal = (function(){
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+
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+ 'use strict';
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+
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+ var SLIDES_SELECTOR = '.reveal .slides section',
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+ HORIZONTAL_SLIDES_SELECTOR = '.reveal .slides>section',
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+ VERTICAL_SLIDES_SELECTOR = '.reveal .slides>section.present>section',
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+
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+ // Configurations defaults, can be overridden at initialization time
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+ config = {
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+ // Display controls in the bottom right corner
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+ controls: true,
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+
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+ // Display a presentation progress bar
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+ progress: true,
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+
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+ // Push each slide change to the browser history
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+ history: false,
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+
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+ // Enable keyboard shortcuts for navigation
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+ keyboard: true,
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+
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+ // Enable the slide overview mode
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+ overview: true,
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+
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+ // Vertical centering of slides
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+ center: true,
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+
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+ // Loop the presentation
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+ loop: false,
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+
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+ // Change the presentation direction to be RTL
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+ rtl: false,
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+
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+ // Number of milliseconds between automatically proceeding to the
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+ // next slide, disabled when set to 0, this value can be overwritten
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+ // by using a data-autoslide attribute on your slides
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+ autoSlide: 0,
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+
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+ // Enable slide navigation via mouse wheel
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+ mouseWheel: false,
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+
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+ // Apply a 3D roll to links on hover
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+ rollingLinks: true,
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+
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+ // Transition style (see /css/theme)
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+ theme: null,
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+
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+ // Transition style
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+ transition: 'default', // default/cube/page/concave/zoom/linear/none
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+
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+ // Script dependencies to load
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+ dependencies: []
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+ },
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+
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+ // Stores if the next slide should be shown automatically
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+ // after n milliseconds
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+ autoSlide = config.autoSlide,
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+
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+ // The horizontal and verical index of the currently active slide
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+ indexh = 0,
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+ indexv = 0,
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+
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+ // The previous and current slide HTML elements
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+ previousSlide,
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+ currentSlide,
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+
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+ // Slides may hold a data-state attribute which we pick up and apply
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+ // as a class to the body. This list contains the combined state of
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+ // all current slides.
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+ state = [],
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+
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+ // Cached references to DOM elements
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+ dom = {},
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+
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+ // Detect support for CSS 3D transforms
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+ supports3DTransforms = 'WebkitPerspective' in document.body.style ||
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+ 'MozPerspective' in document.body.style ||
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+ 'msPerspective' in document.body.style ||
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+ 'OPerspective' in document.body.style ||
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+ 'perspective' in document.body.style,
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+
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+ supports2DTransforms = 'WebkitTransform' in document.body.style ||
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+ 'MozTransform' in document.body.style ||
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+ 'msTransform' in document.body.style ||
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+ 'OTransform' in document.body.style ||
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+ 'transform' in document.body.style,
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+
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+ // Throttles mouse wheel navigation
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+ mouseWheelTimeout = 0,
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+
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+ // An interval used to automatically move on to the next slide
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+ autoSlideTimeout = 0,
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+
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+ // Delays updates to the URL due to a Chrome thumbnailer bug
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+ writeURLTimeout = 0,
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+
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+ // A delay used to ativate the overview mode
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+ activateOverviewTimeout = 0,
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+
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+ // Holds information about the currently ongoing touch input
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+ touch = {
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+ startX: 0,
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+ startY: 0,
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+ startSpan: 0,
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+ startCount: 0,
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+ handled: false,
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+ threshold: 80
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+ };
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+
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+ /**
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+ * Starts up the presentation if the client is capable.
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+ */
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+ function initialize( options ) {
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+ if( ( !supports2DTransforms && !supports3DTransforms ) ) {
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+ document.body.setAttribute( 'class', 'no-transforms' );
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+
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+ // If the browser doesn't support core features we won't be
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+ // using JavaScript to control the presentation
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+ return;
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+ }
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+
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+ // Force a layout when the whole page, incl fonts, has loaded
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+ window.addEventListener( 'load', layout, false );
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+
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+ // Copy options over to our config object
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+ extend( config, options );
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+
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+ // Hide the address bar in mobile browsers
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+ hideAddressBar();
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+
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+ // Loads the dependencies and continues to #start() once done
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+ load();
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+
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+ }
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+
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+ /**
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+ * Finds and stores references to DOM elements which are
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+ * required by the presentation. If a required element is
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+ * not found, it is created.
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+ */
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+ function setupDOM() {
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+ // Cache references to key DOM elements
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+ dom.theme = document.querySelector( '#theme' );
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+ dom.wrapper = document.querySelector( '.reveal' );
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+ dom.slides = document.querySelector( '.reveal .slides' );
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+
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+ // Progress bar
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+ if( !dom.wrapper.querySelector( '.progress' ) && config.progress ) {
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+ var progressElement = document.createElement( 'div' );
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+ progressElement.classList.add( 'progress' );
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+ progressElement.innerHTML = '<span></span>';
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+ dom.wrapper.appendChild( progressElement );
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+ }
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+
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+ // Arrow controls
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+ if( !dom.wrapper.querySelector( '.controls' ) && config.controls ) {
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+ var controlsElement = document.createElement( 'aside' );
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+ controlsElement.classList.add( 'controls' );
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+ controlsElement.innerHTML = '<div class="navigate-left"></div>' +
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+ '<div class="navigate-right"></div>' +
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+ '<div class="navigate-up"></div>' +
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+ '<div class="navigate-down"></div>';
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+ dom.wrapper.appendChild( controlsElement );
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+ }
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+
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+ // Presentation background element
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+ if( !dom.wrapper.querySelector( '.state-background' ) ) {
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+ var backgroundElement = document.createElement( 'div' );
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+ backgroundElement.classList.add( 'state-background' );
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+ dom.wrapper.appendChild( backgroundElement );
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+ }
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+
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+ // Overlay graphic which is displayed during the paused mode
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+ if( !dom.wrapper.querySelector( '.pause-overlay' ) ) {
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+ var pausedElement = document.createElement( 'div' );
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+ pausedElement.classList.add( 'pause-overlay' );
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+ dom.wrapper.appendChild( pausedElement );
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+ }
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+
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+ // Cache references to elements
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+ dom.progress = document.querySelector( '.reveal .progress' );
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+ dom.progressbar = document.querySelector( '.reveal .progress span' );
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+
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+ if ( config.controls ) {
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+ dom.controls = document.querySelector( '.reveal .controls' );
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+
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+ // There can be multiple instances of controls throughout the page
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+ dom.controlsLeft = toArray( document.querySelectorAll( '.navigate-left' ) );
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+ dom.controlsRight = toArray( document.querySelectorAll( '.navigate-right' ) );
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+ dom.controlsUp = toArray( document.querySelectorAll( '.navigate-up' ) );
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+ dom.controlsDown = toArray( document.querySelectorAll( '.navigate-down' ) );
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+ dom.controlsPrev = toArray( document.querySelectorAll( '.navigate-prev' ) );
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+ dom.controlsNext = toArray( document.querySelectorAll( '.navigate-next' ) );
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+ }
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+ }
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+
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+ /**
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+ * Hides the address bar if we're on a mobile device.
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+ */
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+ function hideAddressBar() {
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+ if( navigator.userAgent.match( /(iphone|ipod)/i ) ) {
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+ // Give the page some scrollable overflow
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+ document.documentElement.style.overflow = 'scroll';
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+ document.body.style.height = '120%';
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+
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+ // Events that should trigger the address bar to hide
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+ window.addEventListener( 'load', removeAddressBar, false );
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+ window.addEventListener( 'orientationchange', removeAddressBar, false );
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+ }
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+ }
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+
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+ /**
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+ * Loads the dependencies of reveal.js. Dependencies are
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+ * defined via the configuration option 'dependencies'
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+ * and will be loaded prior to starting/binding reveal.js.
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+ * Some dependencies may have an 'async' flag, if so they
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+ * will load after reveal.js has been started up.
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+ */
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+ function load() {
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+ var scripts = [],
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+ scriptsAsync = [];
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+
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+ for( var i = 0, len = config.dependencies.length; i < len; i++ ) {
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+ var s = config.dependencies[i];
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+
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+ // Load if there's no condition or the condition is truthy
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+ if( !s.condition || s.condition() ) {
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+ if( s.async ) {
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+ scriptsAsync.push( s.src );
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+ }
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+ else {
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+ scripts.push( s.src );
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+ }
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+
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+ // Extension may contain callback functions
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+ if( typeof s.callback === 'function' ) {
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+ head.ready( s.src.match( /([\w\d_\-]*)\.?js$|[^\\\/]*$/i )[0], s.callback );
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+ }
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+ }
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+ }
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+
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+ // Called once synchronous scritps finish loading
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+ function proceed() {
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+ if( scriptsAsync.length ) {
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+ // Load asynchronous scripts
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+ head.js.apply( null, scriptsAsync );
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+ }
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+
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+ start();
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+ }
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+
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+ if( scripts.length ) {
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+ head.ready( proceed );
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+
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+ // Load synchronous scripts
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+ head.js.apply( null, scripts );
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+ }
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+ else {
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+ proceed();
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+ }
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+ }
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+
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+ /**
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+ * Starts up reveal.js by binding input events and navigating
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+ * to the current URL deeplink if there is one.
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+ */
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+ function start() {
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+ // Make sure we've got all the DOM elements we need
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+ setupDOM();
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+
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+ // Subscribe to input
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+ addEventListeners();
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+
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+ // Updates the presentation to match the current configuration values
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+ configure();
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+
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+ // Force an initial layout, will thereafter be invoked as the window
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+ // is resized
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+ layout();
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+
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+ // Read the initial hash
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+ readURL();
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+
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+ // Start auto-sliding if it's enabled
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+ cueAutoSlide();
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+
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+ // Notify listeners that the presentation is ready but use a 1ms
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+ // timeout to ensure it's not fired synchronously after #initialize()
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+ setTimeout( function() {
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+ dispatchEvent( 'ready', {
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+ 'indexh': indexh,
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+ 'indexv': indexv,
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+ 'currentSlide': currentSlide
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+ } );
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+ }, 1 );
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+ }
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+
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+ /**
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+ * Applies the configuration settings from the config object.
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+ */
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+ function configure() {
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+ if( supports3DTransforms === false ) {
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+ config.transition = 'linear';
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+ }
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+
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+ if( config.controls && dom.controls ) {
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+ dom.controls.style.display = 'block';
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+ }
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+
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+ if( config.progress && dom.progress ) {
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+ dom.progress.style.display = 'block';
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+ }
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+
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+ if( config.transition !== 'default' ) {
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+ dom.wrapper.classList.add( config.transition );
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+ }
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+
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+ if( config.rtl ) {
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+ dom.wrapper.classList.add( 'rtl' );
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+ }
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+
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+ if( config.center ) {
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+ dom.wrapper.classList.add( 'center' );
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+ }
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+
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+ if( config.mouseWheel ) {
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+ document.addEventListener( 'DOMMouseScroll', onDocumentMouseScroll, false ); // FF
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+ document.addEventListener( 'mousewheel', onDocumentMouseScroll, false );
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+ }
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+
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+ // 3D links
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+ if( config.rollingLinks ) {
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+ linkify();
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+ }
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+
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+ // Load the theme in the config, if it's not already loaded
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+ if( config.theme && dom.theme ) {
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+ var themeURL = dom.theme.getAttribute( 'href' );
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+ var themeFinder = /[^\/]*?(?=\.css)/;
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+ var themeName = themeURL.match(themeFinder)[0];
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+
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+ if( config.theme !== themeName ) {
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+ themeURL = themeURL.replace(themeFinder, config.theme);
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+ dom.theme.setAttribute( 'href', themeURL );
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+ }
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+ }
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+ }
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+
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+ /**
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+ * Binds all event listeners.
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+ */
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+ function addEventListeners() {
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+ document.addEventListener( 'touchstart', onDocumentTouchStart, false );
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+ document.addEventListener( 'touchmove', onDocumentTouchMove, false );
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+ document.addEventListener( 'touchend', onDocumentTouchEnd, false );
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+ window.addEventListener( 'hashchange', onWindowHashChange, false );
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+ window.addEventListener( 'resize', onWindowResize, false );
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+
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+ if( config.keyboard ) {
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+ document.addEventListener( 'keydown', onDocumentKeyDown, false );
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+ }
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+
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+ if ( config.progress && dom.progress ) {
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+ dom.progress.addEventListener( 'click', preventAndForward( onProgressClick ), false );
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+ }
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+
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+ if ( config.controls && dom.controls ) {
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+ var actionEvent = 'ontouchstart' in window ? 'touchstart' : 'click';
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+ dom.controlsLeft.forEach( function( el ) { el.addEventListener( actionEvent, preventAndForward( navigateLeft ), false ); } );
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+ dom.controlsRight.forEach( function( el ) { el.addEventListener( actionEvent, preventAndForward( navigateRight ), false ); } );
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+ dom.controlsUp.forEach( function( el ) { el.addEventListener( actionEvent, preventAndForward( navigateUp ), false ); } );
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+ dom.controlsDown.forEach( function( el ) { el.addEventListener( actionEvent, preventAndForward( navigateDown ), false ); } );
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+ dom.controlsPrev.forEach( function( el ) { el.addEventListener( actionEvent, preventAndForward( navigatePrev ), false ); } );
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+ dom.controlsNext.forEach( function( el ) { el.addEventListener( actionEvent, preventAndForward( navigateNext ), false ); } );
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+ }
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+ }
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+
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+ /**
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+ * Unbinds all event listeners.
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+ */
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+ function removeEventListeners() {
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+ document.removeEventListener( 'keydown', onDocumentKeyDown, false );
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+ document.removeEventListener( 'touchstart', onDocumentTouchStart, false );
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+ document.removeEventListener( 'touchmove', onDocumentTouchMove, false );
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+ document.removeEventListener( 'touchend', onDocumentTouchEnd, false );
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+ window.removeEventListener( 'hashchange', onWindowHashChange, false );
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+ window.removeEventListener( 'resize', onWindowResize, false );
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+
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+ if ( config.progress && dom.progress ) {
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+ dom.progress.removeEventListener( 'click', preventAndForward( onProgressClick ), false );
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+ }
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+
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+ if ( config.controls && dom.controls ) {
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+ var actionEvent = 'ontouchstart' in window ? 'touchstart' : 'click';
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+ dom.controlsLeft.forEach( function( el ) { el.removeEventListener( actionEvent, preventAndForward( navigateLeft ), false ); } );
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+ dom.controlsRight.forEach( function( el ) { el.removeEventListener( actionEvent, preventAndForward( navigateRight ), false ); } );
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+ dom.controlsUp.forEach( function( el ) { el.removeEventListener( actionEvent, preventAndForward( navigateUp ), false ); } );
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+ dom.controlsDown.forEach( function( el ) { el.removeEventListener( actionEvent, preventAndForward( navigateDown ), false ); } );
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+ dom.controlsPrev.forEach( function( el ) { el.removeEventListener( actionEvent, preventAndForward( navigatePrev ), false ); } );
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+ dom.controlsNext.forEach( function( el ) { el.removeEventListener( actionEvent, preventAndForward( navigateNext ), false ); } );
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+ }
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+ }
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+
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+ /**
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+ * Extend object a with the properties of object b.
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+ * If there's a conflict, object b takes precedence.
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+ */
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+ function extend( a, b ) {
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+ for( var i in b ) {
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+ a[ i ] = b[ i ];
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+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Converts the target object to an array.
|
|
|
+ */
|
|
|
+ function toArray( o ) {
|
|
|
+ return Array.prototype.slice.call( o );
|
|
|
+ }
|
|
|
+
|
|
|
+ function each( targets, method, args ) {
|
|
|
+ targets.forEach( function( el ) {
|
|
|
+ el[method].apply( el, args );
|
|
|
+ } );
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Measures the distance in pixels between point a
|
|
|
+ * and point b.
|
|
|
+ *
|
|
|
+ * @param {Object} a point with x/y properties
|
|
|
+ * @param {Object} b point with x/y properties
|
|
|
+ */
|
|
|
+ function distanceBetween( a, b ) {
|
|
|
+ var dx = a.x - b.x,
|
|
|
+ dy = a.y - b.y;
|
|
|
+
|
|
|
+ return Math.sqrt( dx*dx + dy*dy );
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Prevents an events defaults behavior calls the
|
|
|
+ * specified delegate.
|
|
|
+ *
|
|
|
+ * @param {Function} delegate The method to call
|
|
|
+ * after the wrapper has been executed
|
|
|
+ */
|
|
|
+ function preventAndForward( delegate ) {
|
|
|
+ return function( event ) {
|
|
|
+ event.preventDefault();
|
|
|
+ delegate.call( null, event );
|
|
|
+ };
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Causes the address bar to hide on mobile devices,
|
|
|
+ * more vertical space ftw.
|
|
|
+ */
|
|
|
+ function removeAddressBar() {
|
|
|
+ setTimeout( function() {
|
|
|
+ window.scrollTo( 0, 1 );
|
|
|
+ }, 0 );
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Dispatches an event of the specified type from the
|
|
|
+ * reveal DOM element.
|
|
|
+ */
|
|
|
+ function dispatchEvent( type, properties ) {
|
|
|
+ var event = document.createEvent( "HTMLEvents", 1, 2 );
|
|
|
+ event.initEvent( type, true, true );
|
|
|
+ extend( event, properties );
|
|
|
+ dom.wrapper.dispatchEvent( event );
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Wrap all links in 3D goodness.
|
|
|
+ */
|
|
|
+ function linkify() {
|
|
|
+ if( supports3DTransforms && !( 'msPerspective' in document.body.style ) ) {
|
|
|
+ var nodes = document.querySelectorAll( SLIDES_SELECTOR + ' a:not(.image)' );
|
|
|
+
|
|
|
+ for( var i = 0, len = nodes.length; i < len; i++ ) {
|
|
|
+ var node = nodes[i];
|
|
|
+
|
|
|
+ if( node.textContent && !node.querySelector( 'img' ) && ( !node.className || !node.classList.contains( node, 'roll' ) ) ) {
|
|
|
+ node.classList.add( 'roll' );
|
|
|
+ node.innerHTML = '<span data-title="'+ node.text +'">' + node.innerHTML + '</span>';
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Applies JavaScript-controlled layout rules to the
|
|
|
+ * presentation.
|
|
|
+ */
|
|
|
+ function layout() {
|
|
|
+
|
|
|
+ if( config.center ) {
|
|
|
+
|
|
|
+ // Select all slides, vertical and horizontal
|
|
|
+ var slides = toArray( document.querySelectorAll( SLIDES_SELECTOR ) );
|
|
|
+
|
|
|
+ // Determine the minimum top offset for slides
|
|
|
+ var minTop = -dom.wrapper.offsetHeight / 2;
|
|
|
+
|
|
|
+ for( var i = 0, len = slides.length; i < len; i++ ) {
|
|
|
+ var slide = slides[ i ];
|
|
|
+
|
|
|
+ // Don't bother update invisible slides
|
|
|
+ if( slide.style.display === 'none' ) {
|
|
|
+ continue;
|
|
|
+ }
|
|
|
+
|
|
|
+ // Vertical stacks are not centered since their section
|
|
|
+ // children will be
|
|
|
+ if( slide.classList.contains( 'stack' ) ) {
|
|
|
+ slide.style.top = 0;
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ slide.style.top = Math.max( - ( slide.offsetHeight / 2 ) - 20, minTop ) + 'px';
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 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 {int} v Index to memorize
|
|
|
+ */
|
|
|
+ function setPreviousVerticalIndex( stack, v ) {
|
|
|
+ if( stack ) {
|
|
|
+ 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( stack && stack.classList.contains( 'stack' ) ) {
|
|
|
+ return parseInt( stack.getAttribute( 'data-previous-indexv' ) || 0, 10 );
|
|
|
+ }
|
|
|
+
|
|
|
+ return 0;
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Displays the overview of slides (quick nav) by
|
|
|
+ * scaling down and arranging all slide elements.
|
|
|
+ *
|
|
|
+ * Experimental feature, might be dropped if perf
|
|
|
+ * can't be improved.
|
|
|
+ */
|
|
|
+ function activateOverview() {
|
|
|
+
|
|
|
+ // Only proceed if enabled in config
|
|
|
+ if( config.overview ) {
|
|
|
+
|
|
|
+ dom.wrapper.classList.add( 'overview' );
|
|
|
+
|
|
|
+ clearTimeout( activateOverviewTimeout );
|
|
|
+
|
|
|
+ // Not the pretties solution, but need to let the overview
|
|
|
+ // class apply first so that slides are measured accurately
|
|
|
+ // before we can positon them
|
|
|
+ activateOverviewTimeout = setTimeout( function(){
|
|
|
+
|
|
|
+ var horizontalSlides = document.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR );
|
|
|
+
|
|
|
+ for( var i = 0, len1 = horizontalSlides.length; i < len1; i++ ) {
|
|
|
+ var hslide = horizontalSlides[i],
|
|
|
+ htransform = 'translateZ(-2500px) translate(' + ( ( i - indexh ) * 105 ) + '%, 0%)';
|
|
|
+
|
|
|
+ hslide.setAttribute( 'data-index-h', i );
|
|
|
+ hslide.style.display = 'block';
|
|
|
+ hslide.style.WebkitTransform = htransform;
|
|
|
+ hslide.style.MozTransform = htransform;
|
|
|
+ hslide.style.msTransform = htransform;
|
|
|
+ hslide.style.OTransform = htransform;
|
|
|
+ hslide.style.transform = htransform;
|
|
|
+
|
|
|
+ if( hslide.classList.contains( 'stack' ) ) {
|
|
|
+
|
|
|
+ var verticalSlides = hslide.querySelectorAll( 'section' );
|
|
|
+
|
|
|
+ for( var j = 0, len2 = verticalSlides.length; j < len2; j++ ) {
|
|
|
+ var verticalIndex = i === indexh ? indexv : getPreviousVerticalIndex( hslide );
|
|
|
+
|
|
|
+ var vslide = verticalSlides[j],
|
|
|
+ vtransform = 'translate(0%, ' + ( ( j - verticalIndex ) * 105 ) + '%)';
|
|
|
+
|
|
|
+ vslide.setAttribute( 'data-index-h', i );
|
|
|
+ vslide.setAttribute( 'data-index-v', j );
|
|
|
+ vslide.style.display = 'block';
|
|
|
+ vslide.style.WebkitTransform = vtransform;
|
|
|
+ vslide.style.MozTransform = vtransform;
|
|
|
+ vslide.style.msTransform = vtransform;
|
|
|
+ vslide.style.OTransform = vtransform;
|
|
|
+ vslide.style.transform = vtransform;
|
|
|
+
|
|
|
+ // Navigate to this slide on click
|
|
|
+ vslide.addEventListener( 'click', onOverviewSlideClicked, true );
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+ else {
|
|
|
+
|
|
|
+ // Navigate to this slide on click
|
|
|
+ hslide.addEventListener( 'click', onOverviewSlideClicked, true );
|
|
|
+
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ layout();
|
|
|
+
|
|
|
+ }, 10 );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Exits the slide overview and enters the currently
|
|
|
+ * active slide.
|
|
|
+ */
|
|
|
+ function deactivateOverview() {
|
|
|
+
|
|
|
+ // Only proceed if enabled in config
|
|
|
+ if( config.overview ) {
|
|
|
+
|
|
|
+ clearTimeout( activateOverviewTimeout );
|
|
|
+
|
|
|
+ dom.wrapper.classList.remove( 'overview' );
|
|
|
+
|
|
|
+ // Select all slides
|
|
|
+ var slides = toArray( document.querySelectorAll( SLIDES_SELECTOR ) );
|
|
|
+
|
|
|
+ for( var i = 0, len = slides.length; i < len; i++ ) {
|
|
|
+ var element = slides[i];
|
|
|
+
|
|
|
+ element.style.display = '';
|
|
|
+
|
|
|
+ // Resets all transforms to use the external styles
|
|
|
+ element.style.WebkitTransform = '';
|
|
|
+ element.style.MozTransform = '';
|
|
|
+ element.style.msTransform = '';
|
|
|
+ element.style.OTransform = '';
|
|
|
+ element.style.transform = '';
|
|
|
+
|
|
|
+ element.removeEventListener( 'click', onOverviewSlideClicked, true );
|
|
|
+ }
|
|
|
+
|
|
|
+ slide( indexh, indexv );
|
|
|
+
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Toggles the slide overview mode on and off.
|
|
|
+ *
|
|
|
+ * @param {Boolean} override Optional 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 {
|
|
|
+ isOverviewActive() ? deactivateOverview() : activateOverview();
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Checks if the overview is currently active.
|
|
|
+ *
|
|
|
+ * @return {Boolean} true if the overview is active,
|
|
|
+ * false otherwise
|
|
|
+ */
|
|
|
+ function isOverviewActive() {
|
|
|
+ return dom.wrapper.classList.contains( 'overview' );
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Handling the fullscreen functionality via the fullscreen API
|
|
|
+ *
|
|
|
+ * @see http://fullscreen.spec.whatwg.org/
|
|
|
+ * @see https://developer.mozilla.org/en-US/docs/DOM/Using_fullscreen_mode
|
|
|
+ */
|
|
|
+ function enterFullscreen() {
|
|
|
+ var element = document.body;
|
|
|
+
|
|
|
+ // Check which implementation is available
|
|
|
+ var requestMethod = element.requestFullScreen ||
|
|
|
+ element.webkitRequestFullScreen ||
|
|
|
+ element.mozRequestFullScreen ||
|
|
|
+ element.msRequestFullScreen;
|
|
|
+
|
|
|
+ if( requestMethod ) {
|
|
|
+ requestMethod.apply( element );
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Enters the paused mode which fades everything on screen to
|
|
|
+ * black.
|
|
|
+ */
|
|
|
+ function pause() {
|
|
|
+ dom.wrapper.classList.add( 'paused' );
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Exits from the paused mode.
|
|
|
+ */
|
|
|
+ function resume() {
|
|
|
+ dom.wrapper.classList.remove( 'paused' );
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Toggles the paused mode on and off.
|
|
|
+ */
|
|
|
+ function togglePause() {
|
|
|
+ if( isPaused() ) {
|
|
|
+ resume();
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ pause();
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Checks if we are currently in the paused mode.
|
|
|
+ */
|
|
|
+ function isPaused() {
|
|
|
+ return dom.wrapper.classList.contains( 'paused' );
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Steps from the current point in the presentation to the
|
|
|
+ * slide which matches the specified horizontal and vertical
|
|
|
+ * indices.
|
|
|
+ *
|
|
|
+ * @param {int} h Horizontal index of the target slide
|
|
|
+ * @param {int} v Vertical index of the target slide
|
|
|
+ * @param {int} f Optional index of a fragment within the
|
|
|
+ * target slide to activate
|
|
|
+ */
|
|
|
+ function slide( h, v, f ) {
|
|
|
+ // Remember where we were at before
|
|
|
+ previousSlide = currentSlide;
|
|
|
+
|
|
|
+ // Query all horizontal slides in the deck
|
|
|
+ var horizontalSlides = document.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR );
|
|
|
+
|
|
|
+ // If no vertical index is specified and the upcoming slide is a
|
|
|
+ // stack, resume at its previous vertical index
|
|
|
+ if( v === undefined ) {
|
|
|
+ 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
|
|
|
+ var stateBefore = state.concat();
|
|
|
+
|
|
|
+ // Reset the state array
|
|
|
+ state.length = 0;
|
|
|
+
|
|
|
+ var indexhBefore = indexh,
|
|
|
+ indexvBefore = indexv;
|
|
|
+
|
|
|
+ // 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 );
|
|
|
+
|
|
|
+ layout();
|
|
|
+
|
|
|
+ // Apply the new state
|
|
|
+ stateLoop: for( var i = 0, len = state.length; i < len; i++ ) {
|
|
|
+ // Check if this state existed on the previous slide. If it
|
|
|
+ // did, we will avoid adding it repeatedly
|
|
|
+ for( var j = 0; j < stateBefore.length; j++ ) {
|
|
|
+ if( stateBefore[j] === state[i] ) {
|
|
|
+ stateBefore.splice( j, 1 );
|
|
|
+ continue stateLoop;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ document.documentElement.classList.add( state[i] );
|
|
|
+
|
|
|
+ // Dispatch custom event matching the state's name
|
|
|
+ dispatchEvent( state[i] );
|
|
|
+ }
|
|
|
+
|
|
|
+ // Clean up the remaints of the previous state
|
|
|
+ while( stateBefore.length ) {
|
|
|
+ document.documentElement.classList.remove( stateBefore.pop() );
|
|
|
+ }
|
|
|
+
|
|
|
+ // If the overview is active, re-activate it to update positions
|
|
|
+ if( isOverviewActive() ) {
|
|
|
+ activateOverview();
|
|
|
+ }
|
|
|
+
|
|
|
+ // Update the URL hash after a delay since updating it mid-transition
|
|
|
+ // is likely to cause visual lag
|
|
|
+ writeURL( 1500 );
|
|
|
+
|
|
|
+ // Find the current horizontal slide and any possible vertical slides
|
|
|
+ // within it
|
|
|
+ var currentHorizontalSlide = horizontalSlides[ indexh ],
|
|
|
+ currentVerticalSlides = currentHorizontalSlide.querySelectorAll( 'section' );
|
|
|
+
|
|
|
+ // Store references to the previous and current slides
|
|
|
+ currentSlide = currentVerticalSlides[ indexv ] || currentHorizontalSlide;
|
|
|
+
|
|
|
+
|
|
|
+ // Show fragment, if specified
|
|
|
+ if( ( indexh !== indexhBefore || indexv !== indexvBefore ) && f ) {
|
|
|
+ var fragments = currentSlide.querySelectorAll( '.fragment' );
|
|
|
+
|
|
|
+ toArray( fragments ).forEach( function( fragment, indexf ) {
|
|
|
+ if( indexf < f ) {
|
|
|
+ fragment.classList.add( 'visible' );
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ fragment.classList.remove( 'visible' );
|
|
|
+ }
|
|
|
+ } );
|
|
|
+ }
|
|
|
+
|
|
|
+ // Dispatch an event if the slide changed
|
|
|
+ if( indexh !== indexhBefore || indexv !== indexvBefore ) {
|
|
|
+ dispatchEvent( 'slidechanged', {
|
|
|
+ 'indexh': indexh,
|
|
|
+ 'indexv': indexv,
|
|
|
+ 'previousSlide': previousSlide,
|
|
|
+ 'currentSlide': currentSlide
|
|
|
+ } );
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ // 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.classList.remove( 'present' );
|
|
|
+ }
|
|
|
+
|
|
|
+ updateControls();
|
|
|
+ updateProgress();
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 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
|
|
|
+ var slides = toArray( document.querySelectorAll( selector ) ),
|
|
|
+ slidesLength = slides.length;
|
|
|
+
|
|
|
+ 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( var i = 0; i < slidesLength; i++ ) {
|
|
|
+ var element = slides[i];
|
|
|
+
|
|
|
+ // Optimization; hide all slides that are three or more steps
|
|
|
+ // away from the present slide
|
|
|
+ if( isOverviewActive() === false ) {
|
|
|
+ // The distance loops so that it measures 1 between the first
|
|
|
+ // and last slides
|
|
|
+ var distance = Math.abs( ( index - i ) % ( slidesLength - 3 ) ) || 0;
|
|
|
+
|
|
|
+ element.style.display = distance > 3 ? 'none' : 'block';
|
|
|
+ }
|
|
|
+
|
|
|
+ slides[i].classList.remove( 'past' );
|
|
|
+ slides[i].classList.remove( 'present' );
|
|
|
+ slides[i].classList.remove( 'future' );
|
|
|
+
|
|
|
+ if( i < index ) {
|
|
|
+ // Any element previous to index is given the 'past' class
|
|
|
+ slides[i].classList.add( 'past' );
|
|
|
+ }
|
|
|
+ else if( i > index ) {
|
|
|
+ // Any element subsequent to index is given the 'future' class
|
|
|
+ slides[i].classList.add( 'future' );
|
|
|
+ }
|
|
|
+
|
|
|
+ // If this element contains vertical slides
|
|
|
+ if( element.querySelector( 'section' ) ) {
|
|
|
+ slides[i].classList.add( 'stack' );
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ // Mark the current slide as present
|
|
|
+ slides[index].classList.add( 'present' );
|
|
|
+
|
|
|
+ // If this slide has a state associated with it, add it
|
|
|
+ // onto the current state of the deck
|
|
|
+ var slideState = slides[index].getAttribute( 'data-state' );
|
|
|
+ if( slideState ) {
|
|
|
+ state = state.concat( slideState.split( ' ' ) );
|
|
|
+ }
|
|
|
+
|
|
|
+ // If this slide has a data-autoslide attribtue associated use this as
|
|
|
+ // autoSlide value otherwise use the global configured time
|
|
|
+ var slideAutoSlide = slides[index].getAttribute( 'data-autoslide' );
|
|
|
+ if( slideAutoSlide ) {
|
|
|
+ autoSlide = parseInt( slideAutoSlide, 10 );
|
|
|
+ } else {
|
|
|
+ autoSlide = config.autoSlide;
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ // Since there are no slides we can't be anywhere beyond the
|
|
|
+ // zeroth index
|
|
|
+ index = 0;
|
|
|
+ }
|
|
|
+
|
|
|
+ return index;
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Updates the progress bar to reflect the current slide.
|
|
|
+ */
|
|
|
+ function updateProgress() {
|
|
|
+ // Update progress if enabled
|
|
|
+ if( config.progress && dom.progress ) {
|
|
|
+
|
|
|
+ var horizontalSlides = toArray( document.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) );
|
|
|
+
|
|
|
+ // The number of past and total slides
|
|
|
+ var totalCount = document.querySelectorAll( SLIDES_SELECTOR + ':not(.stack)' ).length;
|
|
|
+ var pastCount = 0;
|
|
|
+
|
|
|
+ // Step through all slides and count the past ones
|
|
|
+ mainLoop: for( var i = 0; i < horizontalSlides.length; i++ ) {
|
|
|
+
|
|
|
+ var horizontalSlide = horizontalSlides[i];
|
|
|
+ var verticalSlides = toArray( horizontalSlide.querySelectorAll( 'section' ) );
|
|
|
+
|
|
|
+ for( var j = 0; j < verticalSlides.length; j++ ) {
|
|
|
+
|
|
|
+ // Stop as soon as we arrive at the present
|
|
|
+ if( verticalSlides[j].classList.contains( 'present' ) ) {
|
|
|
+ break mainLoop;
|
|
|
+ }
|
|
|
+
|
|
|
+ pastCount++;
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ // Stop as soon as we arrive at the present
|
|
|
+ if( horizontalSlide.classList.contains( 'present' ) ) {
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ // Don't count the wrapping section for vertical slides
|
|
|
+ if( horizontalSlide.classList.contains( 'stack' ) === false ) {
|
|
|
+ pastCount++;
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ dom.progressbar.style.width = ( pastCount / ( totalCount - 1 ) ) * window.innerWidth + 'px';
|
|
|
+
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Updates the state of all control/navigation arrows.
|
|
|
+ */
|
|
|
+ function updateControls() {
|
|
|
+ if ( config.controls && dom.controls ) {
|
|
|
+
|
|
|
+ var routes = availableRoutes();
|
|
|
+
|
|
|
+ // Remove the 'enabled' class from all directions
|
|
|
+ dom.controlsLeft.concat( dom.controlsRight )
|
|
|
+ .concat( dom.controlsUp )
|
|
|
+ .concat( dom.controlsDown )
|
|
|
+ .concat( dom.controlsPrev )
|
|
|
+ .concat( dom.controlsNext ).forEach( function( node ) {
|
|
|
+ node.classList.remove( 'enabled' );
|
|
|
+ } );
|
|
|
+
|
|
|
+ // Add the 'enabled' class to the available routes
|
|
|
+ if( routes.left ) dom.controlsLeft.forEach( function( el ) { el.classList.add( 'enabled' ); } );
|
|
|
+ if( routes.right ) dom.controlsRight.forEach( function( el ) { el.classList.add( 'enabled' ); } );
|
|
|
+ if( routes.up ) dom.controlsUp.forEach( function( el ) { el.classList.add( 'enabled' ); } );
|
|
|
+ if( routes.down ) dom.controlsDown.forEach( function( el ) { el.classList.add( 'enabled' ); } );
|
|
|
+
|
|
|
+ // Prev/next buttons
|
|
|
+ if( routes.left || routes.up ) dom.controlsPrev.forEach( function( el ) { el.classList.add( 'enabled' ); } );
|
|
|
+ if( routes.right || routes.down ) dom.controlsNext.forEach( function( el ) { el.classList.add( 'enabled' ); } );
|
|
|
+
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Determine what available routes there are for navigation.
|
|
|
+ *
|
|
|
+ * @return {Object} containing four booleans: left/right/up/down
|
|
|
+ */
|
|
|
+ function availableRoutes() {
|
|
|
+ var horizontalSlides = document.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ),
|
|
|
+ verticalSlides = document.querySelectorAll( VERTICAL_SLIDES_SELECTOR );
|
|
|
+
|
|
|
+ return {
|
|
|
+ left: indexh > 0,
|
|
|
+ right: indexh < horizontalSlides.length - 1,
|
|
|
+ up: indexv > 0,
|
|
|
+ down: indexv < verticalSlides.length - 1
|
|
|
+ };
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Reads the current URL (hash) and navigates accordingly.
|
|
|
+ */
|
|
|
+ function readURL() {
|
|
|
+ var hash = window.location.hash;
|
|
|
+
|
|
|
+ // Attempt to parse the hash as either an index or name
|
|
|
+ var bits = hash.slice( 2 ).split( '/' ),
|
|
|
+ name = hash.replace( /#|\//gi, '' );
|
|
|
+
|
|
|
+ // If the first bit is invalid and there is a name we can
|
|
|
+ // assume that this is a named link
|
|
|
+ if( isNaN( parseInt( bits[0], 10 ) ) && name.length ) {
|
|
|
+ // Find the slide with the specified name
|
|
|
+ var element = document.querySelector( '#' + name );
|
|
|
+
|
|
|
+ if( element ) {
|
|
|
+ // Find the position of the named slide and navigate to it
|
|
|
+ var indices = Reveal.getIndices( element );
|
|
|
+ slide( indices.h, indices.v );
|
|
|
+ }
|
|
|
+ // If the slide doesn't exist, navigate to the current slide
|
|
|
+ else {
|
|
|
+ slide( indexh, indexv );
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ // Read the index components of the hash
|
|
|
+ var h = parseInt( bits[0], 10 ) || 0,
|
|
|
+ v = parseInt( bits[1], 10 ) || 0;
|
|
|
+
|
|
|
+ slide( h, v );
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 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 ) {
|
|
|
+ if( config.history ) {
|
|
|
+
|
|
|
+ // 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 {
|
|
|
+ var url = '/';
|
|
|
+
|
|
|
+ // If the current slide has an ID, use that as a named link
|
|
|
+ if( currentSlide && typeof currentSlide.getAttribute( 'id' ) === 'string' ) {
|
|
|
+ url = '/' + currentSlide.getAttribute( 'id' );
|
|
|
+ }
|
|
|
+ // Otherwise use the /h/v index
|
|
|
+ else {
|
|
|
+ if( indexh > 0 || indexv > 0 ) url += indexh;
|
|
|
+ if( indexv > 0 ) url += '/' + indexv;
|
|
|
+ }
|
|
|
+
|
|
|
+ window.location.hash = url;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Retrieves the h/v location 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 {Object} { h: <int>, v: <int> }
|
|
|
+ */
|
|
|
+ function getIndices( slide ) {
|
|
|
+ // By default, return the current indices
|
|
|
+ var h = indexh,
|
|
|
+ v = indexv;
|
|
|
+
|
|
|
+ // If a slide is specified, return the indices of that slide
|
|
|
+ if( slide ) {
|
|
|
+ var isVertical = !!slide.parentNode.nodeName.match( /section/gi );
|
|
|
+ var slideh = isVertical ? slide.parentNode : slide;
|
|
|
+
|
|
|
+ // Select all horizontal slides
|
|
|
+ var horizontalSlides = toArray( document.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) );
|
|
|
+
|
|
|
+ // Now that we know which the horizontal slide is, get its index
|
|
|
+ h = Math.max( horizontalSlides.indexOf( slideh ), 0 );
|
|
|
+
|
|
|
+ // If this is a vertical slide, grab the vertical index
|
|
|
+ if( isVertical ) {
|
|
|
+ v = Math.max( toArray( slide.parentNode.children ).indexOf( slide ), 0 );
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ return { h: h, v: v };
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Navigate to the next slide fragment.
|
|
|
+ *
|
|
|
+ * @return {Boolean} true if there was a next fragment,
|
|
|
+ * false otherwise
|
|
|
+ */
|
|
|
+ function nextFragment() {
|
|
|
+ // Vertical slides:
|
|
|
+ if( document.querySelector( VERTICAL_SLIDES_SELECTOR + '.present' ) ) {
|
|
|
+ var verticalFragments = document.querySelectorAll( VERTICAL_SLIDES_SELECTOR + '.present .fragment:not(.visible)' );
|
|
|
+ if( verticalFragments.length ) {
|
|
|
+ verticalFragments[0].classList.add( 'visible' );
|
|
|
+
|
|
|
+ // Notify subscribers of the change
|
|
|
+ dispatchEvent( 'fragmentshown', { fragment: verticalFragments[0] } );
|
|
|
+ return true;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ // Horizontal slides:
|
|
|
+ else {
|
|
|
+ var horizontalFragments = document.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR + '.present .fragment:not(.visible)' );
|
|
|
+ if( horizontalFragments.length ) {
|
|
|
+ horizontalFragments[0].classList.add( 'visible' );
|
|
|
+
|
|
|
+ // Notify subscribers of the change
|
|
|
+ dispatchEvent( 'fragmentshown', { fragment: horizontalFragments[0] } );
|
|
|
+ return true;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ return false;
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Navigate to the previous slide fragment.
|
|
|
+ *
|
|
|
+ * @return {Boolean} true if there was a previous fragment,
|
|
|
+ * false otherwise
|
|
|
+ */
|
|
|
+ function previousFragment() {
|
|
|
+ // Vertical slides:
|
|
|
+ if( document.querySelector( VERTICAL_SLIDES_SELECTOR + '.present' ) ) {
|
|
|
+ var verticalFragments = document.querySelectorAll( VERTICAL_SLIDES_SELECTOR + '.present .fragment.visible' );
|
|
|
+ if( verticalFragments.length ) {
|
|
|
+ verticalFragments[ verticalFragments.length - 1 ].classList.remove( 'visible' );
|
|
|
+
|
|
|
+ // Notify subscribers of the change
|
|
|
+ dispatchEvent( 'fragmenthidden', { fragment: verticalFragments[ verticalFragments.length - 1 ] } );
|
|
|
+ return true;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ // Horizontal slides:
|
|
|
+ else {
|
|
|
+ var horizontalFragments = document.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR + '.present .fragment.visible' );
|
|
|
+ if( horizontalFragments.length ) {
|
|
|
+ horizontalFragments[ horizontalFragments.length - 1 ].classList.remove( 'visible' );
|
|
|
+
|
|
|
+ // Notify subscribers of the change
|
|
|
+ dispatchEvent( 'fragmenthidden', { fragment: horizontalFragments[ horizontalFragments.length - 1 ] } );
|
|
|
+ return true;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ return false;
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Cues a new automated slide if enabled in the config.
|
|
|
+ */
|
|
|
+ function cueAutoSlide() {
|
|
|
+ clearTimeout( autoSlideTimeout );
|
|
|
+
|
|
|
+ // Cue the next auto-slide if enabled
|
|
|
+ if( autoSlide ) {
|
|
|
+ autoSlideTimeout = setTimeout( navigateNext, autoSlide );
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ function navigateLeft() {
|
|
|
+ // Prioritize hiding fragments
|
|
|
+ if( availableRoutes().left && isOverviewActive() || previousFragment() === false ) {
|
|
|
+ slide( indexh - 1 );
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ function navigateRight() {
|
|
|
+ // Prioritize revealing fragments
|
|
|
+ if( availableRoutes().right && isOverviewActive() || nextFragment() === false ) {
|
|
|
+ slide( indexh + 1 );
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ function navigateUp() {
|
|
|
+ // Prioritize hiding fragments
|
|
|
+ if( availableRoutes().up && isOverviewActive() || previousFragment() === false ) {
|
|
|
+ slide( indexh, indexv - 1 );
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ function navigateDown() {
|
|
|
+ // Prioritize revealing fragments
|
|
|
+ if( availableRoutes().down && isOverviewActive() || nextFragment() === false ) {
|
|
|
+ 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( previousFragment() === false ) {
|
|
|
+ if( availableRoutes().up ) {
|
|
|
+ navigateUp();
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ // Fetch the previous horizontal slide, if there is one
|
|
|
+ var previousSlide = document.querySelector( HORIZONTAL_SLIDES_SELECTOR + '.past:nth-child(' + indexh + ')' );
|
|
|
+
|
|
|
+ if( previousSlide ) {
|
|
|
+ indexv = ( previousSlide.querySelectorAll( 'section' ).length + 1 ) || undefined;
|
|
|
+ indexh --;
|
|
|
+ slide();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Same as #navigatePrev() but navigates forwards.
|
|
|
+ */
|
|
|
+ function navigateNext() {
|
|
|
+ // Prioritize revealing fragments
|
|
|
+ if( nextFragment() === false ) {
|
|
|
+ availableRoutes().down ? navigateDown() : navigateRight();
|
|
|
+ }
|
|
|
+
|
|
|
+ // If auto-sliding is enabled we need to cue up
|
|
|
+ // another timeout
|
|
|
+ cueAutoSlide();
|
|
|
+ }
|
|
|
+
|
|
|
+
|
|
|
+ // --------------------------------------------------------------------//
|
|
|
+ // ----------------------------- EVENTS -------------------------------//
|
|
|
+ // --------------------------------------------------------------------//
|
|
|
+
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Handler for the document level 'keydown' event.
|
|
|
+ *
|
|
|
+ * @param {Object} event
|
|
|
+ */
|
|
|
+ function onDocumentKeyDown( event ) {
|
|
|
+ // Check if there's a focused element that could be using
|
|
|
+ // the keyboard
|
|
|
+ var activeElement = document.activeElement;
|
|
|
+ var hasFocus = !!( document.activeElement && ( document.activeElement.type || document.activeElement.href || document.activeElement.contentEditable !== 'inherit' ) );
|
|
|
+
|
|
|
+ // Disregard the event if there's a focused element or a
|
|
|
+ // keyboard modifier key is present
|
|
|
+ if ( hasFocus || event.shiftKey || event.altKey || event.ctrlKey || event.metaKey ) return;
|
|
|
+
|
|
|
+ var triggered = true;
|
|
|
+
|
|
|
+ switch( event.keyCode ) {
|
|
|
+ // p, page up
|
|
|
+ case 80: case 33: navigatePrev(); break;
|
|
|
+ // n, page down
|
|
|
+ case 78: case 34: navigateNext(); break;
|
|
|
+ // h, left
|
|
|
+ case 72: case 37: navigateLeft(); break;
|
|
|
+ // l, right
|
|
|
+ case 76: case 39: navigateRight(); break;
|
|
|
+ // k, up
|
|
|
+ case 75: case 38: navigateUp(); break;
|
|
|
+ // j, down
|
|
|
+ case 74: case 40: navigateDown(); break;
|
|
|
+ // home
|
|
|
+ case 36: slide( 0 ); break;
|
|
|
+ // end
|
|
|
+ case 35: slide( Number.MAX_VALUE ); break;
|
|
|
+ // space
|
|
|
+ case 32: isOverviewActive() ? deactivateOverview() : navigateNext(); break;
|
|
|
+ // return
|
|
|
+ case 13: isOverviewActive() ? deactivateOverview() : triggered = false; break;
|
|
|
+ // b, period
|
|
|
+ case 66: case 190: togglePause(); break;
|
|
|
+ // f
|
|
|
+ case 70: enterFullscreen(); break;
|
|
|
+ default:
|
|
|
+ triggered = false;
|
|
|
+ }
|
|
|
+
|
|
|
+ // If the input resulted in a triggered action we should prevent
|
|
|
+ // the browsers default behavior
|
|
|
+ if( triggered ) {
|
|
|
+ event.preventDefault();
|
|
|
+ }
|
|
|
+ else if ( event.keyCode === 27 && supports3DTransforms ) {
|
|
|
+ toggleOverview();
|
|
|
+
|
|
|
+ event.preventDefault();
|
|
|
+ }
|
|
|
+
|
|
|
+ // If auto-sliding is enabled we need to cue up
|
|
|
+ // another timeout
|
|
|
+ cueAutoSlide();
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Handler for the document level 'touchstart' event,
|
|
|
+ * enables support for swipe and pinch gestures.
|
|
|
+ */
|
|
|
+ function onDocumentTouchStart( event ) {
|
|
|
+ touch.startX = event.touches[0].clientX;
|
|
|
+ touch.startY = event.touches[0].clientY;
|
|
|
+ touch.startCount = event.touches.length;
|
|
|
+
|
|
|
+ // If there's two touches we need to memorize the distance
|
|
|
+ // between those two points to detect pinching
|
|
|
+ if( event.touches.length === 2 && config.overview ) {
|
|
|
+ touch.startSpan = distanceBetween( {
|
|
|
+ x: event.touches[1].clientX,
|
|
|
+ y: event.touches[1].clientY
|
|
|
+ }, {
|
|
|
+ x: touch.startX,
|
|
|
+ y: touch.startY
|
|
|
+ } );
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Handler for the document level 'touchmove' event.
|
|
|
+ */
|
|
|
+ function onDocumentTouchMove( event ) {
|
|
|
+ // Each touch should only trigger one action
|
|
|
+ if( !touch.handled ) {
|
|
|
+ var currentX = event.touches[0].clientX;
|
|
|
+ var currentY = event.touches[0].clientY;
|
|
|
+
|
|
|
+ // If the touch started off with two points and still has
|
|
|
+ // two active touches; test for the pinch gesture
|
|
|
+ if( event.touches.length === 2 && touch.startCount === 2 && config.overview ) {
|
|
|
+
|
|
|
+ // The current distance in pixels between the two touch points
|
|
|
+ var currentSpan = distanceBetween( {
|
|
|
+ x: event.touches[1].clientX,
|
|
|
+ y: event.touches[1].clientY
|
|
|
+ }, {
|
|
|
+ x: touch.startX,
|
|
|
+ y: touch.startY
|
|
|
+ } );
|
|
|
+
|
|
|
+ // If the span is larger than the desire amount we've got
|
|
|
+ // ourselves a pinch
|
|
|
+ if( Math.abs( touch.startSpan - currentSpan ) > touch.threshold ) {
|
|
|
+ touch.handled = true;
|
|
|
+
|
|
|
+ if( currentSpan < touch.startSpan ) {
|
|
|
+ activateOverview();
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ deactivateOverview();
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ event.preventDefault();
|
|
|
+
|
|
|
+ }
|
|
|
+ // There was only one touch point, look for a swipe
|
|
|
+ else if( event.touches.length === 1 && touch.startCount !== 2 ) {
|
|
|
+
|
|
|
+ var deltaX = currentX - touch.startX,
|
|
|
+ deltaY = currentY - touch.startY;
|
|
|
+
|
|
|
+ if( deltaX > touch.threshold && Math.abs( deltaX ) > Math.abs( deltaY ) ) {
|
|
|
+ touch.handled = true;
|
|
|
+ navigateLeft();
|
|
|
+ }
|
|
|
+ else if( deltaX < -touch.threshold && Math.abs( deltaX ) > Math.abs( deltaY ) ) {
|
|
|
+ touch.handled = true;
|
|
|
+ navigateRight();
|
|
|
+ }
|
|
|
+ else if( deltaY > touch.threshold ) {
|
|
|
+ touch.handled = true;
|
|
|
+ navigateUp();
|
|
|
+ }
|
|
|
+ else if( deltaY < -touch.threshold ) {
|
|
|
+ touch.handled = true;
|
|
|
+ navigateDown();
|
|
|
+ }
|
|
|
+
|
|
|
+ event.preventDefault();
|
|
|
+
|
|
|
+ }
|
|
|
+ }
|
|
|
+ // There's a bug with swiping on some Android devices unless
|
|
|
+ // the default action is always prevented
|
|
|
+ else if( navigator.userAgent.match( /android/gi ) ) {
|
|
|
+ event.preventDefault();
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Handler for the document level 'touchend' event.
|
|
|
+ */
|
|
|
+ function onDocumentTouchEnd( event ) {
|
|
|
+ touch.handled = false;
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Handles mouse wheel scrolling, throttled to avoid skipping
|
|
|
+ * multiple slides.
|
|
|
+ */
|
|
|
+ function onDocumentMouseScroll( event ){
|
|
|
+ clearTimeout( mouseWheelTimeout );
|
|
|
+
|
|
|
+ mouseWheelTimeout = setTimeout( function() {
|
|
|
+ var delta = event.detail || -event.wheelDelta;
|
|
|
+ if( delta > 0 ) {
|
|
|
+ navigateNext();
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ navigatePrev();
|
|
|
+ }
|
|
|
+ }, 100 );
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Clicking on the progress bar results in a navigation to the
|
|
|
+ * closest approximate horizontal slide using this equation:
|
|
|
+ *
|
|
|
+ * ( clickX / presentationWidth ) * numberOfSlides
|
|
|
+ */
|
|
|
+ function onProgressClick( event ) {
|
|
|
+ var slidesTotal = toArray( document.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ).length;
|
|
|
+ var slideIndex = Math.floor( ( event.clientX / dom.wrapper.offsetWidth ) * slidesTotal );
|
|
|
+
|
|
|
+ slide( slideIndex );
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Handler for the window level 'hashchange' event.
|
|
|
+ */
|
|
|
+ function onWindowHashChange( event ) {
|
|
|
+ readURL();
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Handler for the window level 'resize' event.
|
|
|
+ */
|
|
|
+ function onWindowResize( event ) {
|
|
|
+ layout();
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Invoked when a slide is and we're in the overview.
|
|
|
+ */
|
|
|
+ function onOverviewSlideClicked( event ) {
|
|
|
+ // TODO There's a bug here where the event listeners are not
|
|
|
+ // removed after deactivating the overview.
|
|
|
+ if( isOverviewActive() ) {
|
|
|
+ event.preventDefault();
|
|
|
+
|
|
|
+ deactivateOverview();
|
|
|
+
|
|
|
+ var element = event.target;
|
|
|
+
|
|
|
+ while( element && !element.nodeName.match( /section/gi ) ) {
|
|
|
+ element = element.parentNode;
|
|
|
+ }
|
|
|
+
|
|
|
+ if( element.nodeName.match( /section/gi ) ) {
|
|
|
+ var h = parseInt( element.getAttribute( 'data-index-h' ), 10 ),
|
|
|
+ v = parseInt( element.getAttribute( 'data-index-v' ), 10 );
|
|
|
+
|
|
|
+ slide( h, v );
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+
|
|
|
+ // --------------------------------------------------------------------//
|
|
|
+ // ------------------------------- API --------------------------------//
|
|
|
+ // --------------------------------------------------------------------//
|
|
|
+
|
|
|
+
|
|
|
+ return {
|
|
|
+ initialize: initialize,
|
|
|
+
|
|
|
+ // Navigation methods
|
|
|
+ slide: slide,
|
|
|
+ left: navigateLeft,
|
|
|
+ right: navigateRight,
|
|
|
+ up: navigateUp,
|
|
|
+ down: navigateDown,
|
|
|
+ prev: navigatePrev,
|
|
|
+ next: navigateNext,
|
|
|
+ prevFragment: previousFragment,
|
|
|
+ nextFragment: nextFragment,
|
|
|
+
|
|
|
+ // Deprecated aliases
|
|
|
+ navigateTo: slide,
|
|
|
+ navigateLeft: navigateLeft,
|
|
|
+ navigateRight: navigateRight,
|
|
|
+ navigateUp: navigateUp,
|
|
|
+ navigateDown: navigateDown,
|
|
|
+ navigatePrev: navigatePrev,
|
|
|
+ navigateNext: navigateNext,
|
|
|
+
|
|
|
+ // Toggles the overview mode on/off
|
|
|
+ toggleOverview: toggleOverview,
|
|
|
+
|
|
|
+ // Adds or removes all internal event listeners (such as keyboard)
|
|
|
+ addEventListeners: addEventListeners,
|
|
|
+ removeEventListeners: removeEventListeners,
|
|
|
+
|
|
|
+ // Returns the indices of the current, or specified, slide
|
|
|
+ getIndices: getIndices,
|
|
|
+
|
|
|
+ // Returns the previous slide element, may be null
|
|
|
+ getPreviousSlide: function() {
|
|
|
+ return previousSlide;
|
|
|
+ },
|
|
|
+
|
|
|
+ // Returns the current slide element
|
|
|
+ getCurrentSlide: function() {
|
|
|
+ return currentSlide;
|
|
|
+ },
|
|
|
+
|
|
|
+ // Helper method, retrieves query string as a key/value hash
|
|
|
+ getQueryHash: function() {
|
|
|
+ var query = {};
|
|
|
+
|
|
|
+ location.search.replace( /[A-Z0-9]+?=(\w*)/gi, function(a) {
|
|
|
+ query[ a.split( '=' ).shift() ] = a.split( '=' ).pop();
|
|
|
+ } );
|
|
|
+
|
|
|
+ return query;
|
|
|
+ },
|
|
|
+
|
|
|
+ // Forward event binding to the reveal DOM element
|
|
|
+ addEventListener: function( type, listener, useCapture ) {
|
|
|
+ if( 'addEventListener' in window ) {
|
|
|
+ ( dom.wrapper || document.querySelector( '.reveal' ) ).addEventListener( type, listener, useCapture );
|
|
|
+ }
|
|
|
+ },
|
|
|
+ removeEventListener: function( type, listener, useCapture ) {
|
|
|
+ if( 'addEventListener' in window ) {
|
|
|
+ ( dom.wrapper || document.querySelector( '.reveal' ) ).removeEventListener( type, listener, useCapture );
|
|
|
+ }
|
|
|
+ }
|
|
|
+ };
|
|
|
+
|
|
|
+})();
|