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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) 2014 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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+ HOME_SLIDE_SELECTOR = '.reveal .slides>section:first-of-type',
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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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+
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+ // The "normal" size of the presentation, aspect ratio will be preserved
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+ // when the presentation is scaled to fit different resolutions
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+ width: 960,
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+ height: 700,
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+
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+ // Factor of the display size that should remain empty around the content
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+ margin: 0.1,
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+
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+ // Bounds for smallest/largest possible scale to apply to content
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+ minScale: 0.2,
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+ maxScale: 1.0,
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+
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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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+ // Display the page number of the current slide
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+ slideNumber: false,
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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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+ // Enables touch navigation on devices with touch input
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+ touch: 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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+ // Turns fragments on and off globally
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+ fragments: true,
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+
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+ // Flags if the presentation is running in an embedded mode,
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+ // i.e. contained within a limited portion of the screen
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+ embedded: 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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+ // Stop auto-sliding after user input
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+ autoSlideStoppable: true,
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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: false,
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+
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+ // Hides the address bar on mobile devices
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+ hideAddressBar: true,
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+
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+ // Opens links in an iframe preview overlay
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+ previewLinks: false,
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+
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+ // Focuses body when page changes visiblity to ensure keyboard shortcuts work
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+ focusBodyOnPageVisiblityChange: true,
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+
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+ // Theme (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/fade/none
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+
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+ // Transition speed
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+ transitionSpeed: 'default', // default/fast/slow
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+
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+ // Transition style for full page slide backgrounds
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+ backgroundTransition: 'default', // default/linear/none
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+
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+ // Parallax background image
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+ parallaxBackgroundImage: '', // CSS syntax, e.g. "a.jpg"
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+
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+ // Parallax background size
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+ parallaxBackgroundSize: '', // CSS syntax, e.g. "3000px 2000px"
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+
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+ // Number of slides away from the current that are visible
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+ viewDistance: 3,
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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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+
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+ // Flags if reveal.js is loaded (has dispatched the 'ready' event)
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+ loaded = false,
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+
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+ // The horizontal and vertical index of the currently active slide
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+ indexh,
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+ indexv,
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+
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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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+ previousBackground,
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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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+ // The current scale of the presentation (see width/height config)
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+ scale = 1,
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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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+ // Features supported by the browser, see #checkCapabilities()
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+ features = {},
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+
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+ // Client is a mobile device, see #checkCapabilities()
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+ isMobileDevice,
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+
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+ // Throttles mouse wheel navigation
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+ lastMouseWheelStep = 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 activate the overview mode
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+ activateOverviewTimeout = 0,
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+
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+ // A delay used to deactivate the overview mode
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+ deactivateOverviewTimeout = 0,
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+
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+ // Flags if the interaction event listeners are bound
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+ eventsAreBound = false,
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+
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+ // The current auto-slide duration
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+ autoSlide = 0,
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+
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+ // Auto slide properties
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+ autoSlidePlayer,
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+ autoSlideTimeout = 0,
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+ autoSlideStartTime = -1,
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+ autoSlidePaused = false,
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+
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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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+ captured: false,
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+ threshold: 40
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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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+
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+ checkCapabilities();
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+
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+ if( !features.transforms2d && !features.transforms3d ) {
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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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+ var query = Reveal.getQueryHash();
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+
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+ // Do not accept new dependencies via query config to avoid
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+ // the potential of malicious script injection
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+ if( typeof query['dependencies'] !== 'undefined' ) delete query['dependencies'];
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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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+ extend( config, query );
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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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+ * Inspect the client to see what it's capable of, this
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+ * should only happens once per runtime.
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+ */
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+ function checkCapabilities() {
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+
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+ features.transforms3d = '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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+ features.transforms2d = '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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+ features.requestAnimationFrameMethod = window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame;
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+ features.requestAnimationFrame = typeof features.requestAnimationFrameMethod === 'function';
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+
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+ features.canvas = !!document.createElement( 'canvas' ).getContext;
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+
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+ isMobileDevice = navigator.userAgent.match( /(iphone|ipod|android)/gi );
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+
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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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+
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+ var scripts = [],
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+ scriptsAsync = [],
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+ scriptsToPreload = 0;
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+
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+ // Called once synchronous scripts 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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+ function loadScript( s ) {
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+ head.ready( s.src.match( /([\w\d_\-]*)\.?js$|[^\\\/]*$/i )[0], function() {
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+ // Extension may contain callback functions
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+ if( typeof s.callback === 'function' ) {
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+ s.callback.apply( this );
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+ }
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+
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+ if( --scriptsToPreload === 0 ) {
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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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+ 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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+ loadScript( s );
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+ }
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+ }
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+
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+ if( scripts.length ) {
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+ scriptsToPreload = scripts.length;
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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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+ /**
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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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+
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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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+ // Resets all vertical slides so that only the first is visible
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+ resetVerticalSlides();
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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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+ // Read the initial hash
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+ readURL();
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+
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+ // Update all backgrounds
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+ updateBackground( true );
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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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+ // Enable transitions now that we're loaded
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+ dom.slides.classList.remove( 'no-transition' );
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+
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+ loaded = true;
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+
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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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+ /**
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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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+
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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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+ // Prevent transitions while we're loading
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+ dom.slides.classList.add( 'no-transition' );
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+
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+ // Background element
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+ dom.background = createSingletonNode( dom.wrapper, 'div', 'backgrounds', null );
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+
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+ // Progress bar
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+ dom.progress = createSingletonNode( dom.wrapper, 'div', 'progress', '<span></span>' );
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+ dom.progressbar = dom.progress.querySelector( 'span' );
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+
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+ // Arrow controls
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+ createSingletonNode( dom.wrapper, 'aside', 'controls',
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+ '<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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+
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+ // Slide number
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+ dom.slideNumber = createSingletonNode( dom.wrapper, 'div', 'slide-number', '' );
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+
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+ // State background element [DEPRECATED]
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+ createSingletonNode( dom.wrapper, 'div', 'state-background', null );
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+
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+ // Overlay graphic which is displayed during the paused mode
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+ createSingletonNode( dom.wrapper, 'div', 'pause-overlay', null );
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+
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+ // Cache references to elements
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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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+ * Creates an HTML element and returns a reference to it.
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+ * If the element already exists the existing instance will
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+ * be returned.
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+ */
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+ function createSingletonNode( container, tagname, classname, innerHTML ) {
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+
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+ var node = container.querySelector( '.' + classname );
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+ if( !node ) {
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+ node = document.createElement( tagname );
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+ node.classList.add( classname );
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+ if( innerHTML !== null ) {
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+ node.innerHTML = innerHTML;
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+ }
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+ container.appendChild( node );
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+ }
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+ return node;
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+
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+ }
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+
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+ /**
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+ * Creates the slide background elements and appends them
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+ * to the background container. One element is created per
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+ * slide no matter if the given slide has visible background.
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+ */
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+ function createBackgrounds() {
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+
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+ if( isPrintingPDF() ) {
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+ document.body.classList.add( 'print-pdf' );
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+ }
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+
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+ // Clear prior backgrounds
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+ dom.background.innerHTML = '';
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+ dom.background.classList.add( 'no-transition' );
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+
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+ // Helper method for creating a background element for the
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+ // given slide
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+ function _createBackground( slide, container ) {
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+
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+ var data = {
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+ background: slide.getAttribute( 'data-background' ),
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+ backgroundSize: slide.getAttribute( 'data-background-size' ),
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+ backgroundImage: slide.getAttribute( 'data-background-image' ),
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+ backgroundColor: slide.getAttribute( 'data-background-color' ),
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+ backgroundRepeat: slide.getAttribute( 'data-background-repeat' ),
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+ backgroundPosition: slide.getAttribute( 'data-background-position' ),
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+ backgroundTransition: slide.getAttribute( 'data-background-transition' )
|
|
|
+ };
|
|
|
+
|
|
|
+ var element = document.createElement( 'div' );
|
|
|
+ element.className = 'slide-background';
|
|
|
+
|
|
|
+ if( data.background ) {
|
|
|
+ // Auto-wrap image urls in url(...)
|
|
|
+ if( /^(http|file|\/\/)/gi.test( data.background ) || /\.(svg|png|jpg|jpeg|gif|bmp)$/gi.test( data.background ) ) {
|
|
|
+ element.style.backgroundImage = 'url('+ data.background +')';
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ element.style.background = data.background;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ if( data.background || data.backgroundColor || data.backgroundImage ) {
|
|
|
+ element.setAttribute( 'data-background-hash', data.background + data.backgroundSize + data.backgroundImage + data.backgroundColor + data.backgroundRepeat + data.backgroundPosition + data.backgroundTransition );
|
|
|
+ }
|
|
|
+
|
|
|
+ // Additional and optional background properties
|
|
|
+ if( data.backgroundSize ) element.style.backgroundSize = data.backgroundSize;
|
|
|
+ if( data.backgroundImage ) element.style.backgroundImage = 'url("' + data.backgroundImage + '")';
|
|
|
+ if( data.backgroundColor ) element.style.backgroundColor = data.backgroundColor;
|
|
|
+ if( data.backgroundRepeat ) element.style.backgroundRepeat = data.backgroundRepeat;
|
|
|
+ if( data.backgroundPosition ) element.style.backgroundPosition = data.backgroundPosition;
|
|
|
+ if( data.backgroundTransition ) element.setAttribute( 'data-background-transition', data.backgroundTransition );
|
|
|
+
|
|
|
+ container.appendChild( element );
|
|
|
+
|
|
|
+ return element;
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ // Iterate over all horizontal slides
|
|
|
+ toArray( document.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ).forEach( function( slideh ) {
|
|
|
+
|
|
|
+ var backgroundStack;
|
|
|
+
|
|
|
+ if( isPrintingPDF() ) {
|
|
|
+ backgroundStack = _createBackground( slideh, slideh );
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ backgroundStack = _createBackground( slideh, dom.background );
|
|
|
+ }
|
|
|
+
|
|
|
+ // Iterate over all vertical slides
|
|
|
+ toArray( slideh.querySelectorAll( 'section' ) ).forEach( function( slidev ) {
|
|
|
+
|
|
|
+ if( isPrintingPDF() ) {
|
|
|
+ _createBackground( slidev, slidev );
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ _createBackground( slidev, backgroundStack );
|
|
|
+ }
|
|
|
+
|
|
|
+ } );
|
|
|
+
|
|
|
+ } );
|
|
|
+
|
|
|
+ // Add parallax background if specified
|
|
|
+ if( config.parallaxBackgroundImage ) {
|
|
|
+
|
|
|
+ dom.background.style.backgroundImage = 'url("' + config.parallaxBackgroundImage + '")';
|
|
|
+ dom.background.style.backgroundSize = config.parallaxBackgroundSize;
|
|
|
+
|
|
|
+ // 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( function() {
|
|
|
+ dom.wrapper.classList.add( 'has-parallax-background' );
|
|
|
+ }, 1 );
|
|
|
+
|
|
|
+ }
|
|
|
+ else {
|
|
|
+
|
|
|
+ dom.background.style.backgroundImage = '';
|
|
|
+ dom.wrapper.classList.remove( 'has-parallax-background' );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Applies the configuration settings from the config
|
|
|
+ * object. May be called multiple times.
|
|
|
+ */
|
|
|
+ function configure( options ) {
|
|
|
+
|
|
|
+ var numberOfSlides = document.querySelectorAll( SLIDES_SELECTOR ).length;
|
|
|
+
|
|
|
+ dom.wrapper.classList.remove( 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 );
|
|
|
+
|
|
|
+ // Force linear transition based on browser capabilities
|
|
|
+ if( features.transforms3d === false ) config.transition = 'linear';
|
|
|
+
|
|
|
+ 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';
|
|
|
+
|
|
|
+ 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' );
|
|
|
+ }
|
|
|
+
|
|
|
+ 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 );
|
|
|
+ }
|
|
|
+
|
|
|
+ // Rolling 3D links
|
|
|
+ if( config.rollingLinks ) {
|
|
|
+ enableRollingLinks();
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ disableRollingLinks();
|
|
|
+ }
|
|
|
+
|
|
|
+ // Iframe link previews
|
|
|
+ if( config.previewLinks ) {
|
|
|
+ enablePreviewLinks();
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ disablePreviewLinks();
|
|
|
+ enablePreviewLinks( '[data-preview-link]' );
|
|
|
+ }
|
|
|
+
|
|
|
+ // Auto-slide playback controls
|
|
|
+ if( numberOfSlides > 1 && config.autoSlide && config.autoSlideStoppable && features.canvas && features.requestAnimationFrame ) {
|
|
|
+ autoSlidePlayer = new Playback( dom.wrapper, function() {
|
|
|
+ return Math.min( Math.max( ( Date.now() - autoSlideStartTime ) / autoSlide, 0 ), 1 );
|
|
|
+ } );
|
|
|
+
|
|
|
+ autoSlidePlayer.on( 'click', onAutoSlidePlayerClick );
|
|
|
+ autoSlidePaused = false;
|
|
|
+ }
|
|
|
+ else if( autoSlidePlayer ) {
|
|
|
+ autoSlidePlayer.destroy();
|
|
|
+ autoSlidePlayer = null;
|
|
|
+ }
|
|
|
+
|
|
|
+ // Load the theme in the config, if it's not already loaded
|
|
|
+ if( config.theme && dom.theme ) {
|
|
|
+ var themeURL = dom.theme.getAttribute( 'href' );
|
|
|
+ var themeFinder = /[^\/]*?(?=\.css)/;
|
|
|
+ var themeName = themeURL.match(themeFinder)[0];
|
|
|
+
|
|
|
+ if( config.theme !== themeName ) {
|
|
|
+ themeURL = themeURL.replace(themeFinder, config.theme);
|
|
|
+ dom.theme.setAttribute( 'href', themeURL );
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ sync();
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Binds all event listeners.
|
|
|
+ */
|
|
|
+ function addEventListeners() {
|
|
|
+
|
|
|
+ eventsAreBound = true;
|
|
|
+
|
|
|
+ window.addEventListener( 'hashchange', onWindowHashChange, false );
|
|
|
+ window.addEventListener( 'resize', onWindowResize, false );
|
|
|
+
|
|
|
+ if( config.touch ) {
|
|
|
+ dom.wrapper.addEventListener( 'touchstart', onTouchStart, false );
|
|
|
+ dom.wrapper.addEventListener( 'touchmove', onTouchMove, false );
|
|
|
+ dom.wrapper.addEventListener( 'touchend', onTouchEnd, false );
|
|
|
+
|
|
|
+ // Support pointer-style touch interaction as well
|
|
|
+ if( window.navigator.msPointerEnabled ) {
|
|
|
+ dom.wrapper.addEventListener( 'MSPointerDown', onPointerDown, false );
|
|
|
+ dom.wrapper.addEventListener( 'MSPointerMove', onPointerMove, false );
|
|
|
+ dom.wrapper.addEventListener( 'MSPointerUp', onPointerUp, false );
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ if( config.keyboard ) {
|
|
|
+ document.addEventListener( 'keydown', onDocumentKeyDown, false );
|
|
|
+ }
|
|
|
+
|
|
|
+ if( config.progress && dom.progress ) {
|
|
|
+ dom.progress.addEventListener( 'click', onProgressClicked, false );
|
|
|
+ }
|
|
|
+
|
|
|
+ if( config.focusBodyOnPageVisiblityChange ) {
|
|
|
+ var visibilityChange;
|
|
|
+
|
|
|
+ if( 'hidden' in document ) {
|
|
|
+ visibilityChange = 'visibilitychange';
|
|
|
+ }
|
|
|
+ else if( 'msHidden' in document ) {
|
|
|
+ visibilityChange = 'msvisibilitychange';
|
|
|
+ }
|
|
|
+ else if( 'webkitHidden' in document ) {
|
|
|
+ visibilityChange = 'webkitvisibilitychange';
|
|
|
+ }
|
|
|
+
|
|
|
+ if( visibilityChange ) {
|
|
|
+ document.addEventListener( visibilityChange, onPageVisibilityChange, false );
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ [ 'touchstart', 'click' ].forEach( function( eventName ) {
|
|
|
+ dom.controlsLeft.forEach( function( el ) { el.addEventListener( eventName, onNavigateLeftClicked, false ); } );
|
|
|
+ dom.controlsRight.forEach( function( el ) { el.addEventListener( eventName, onNavigateRightClicked, false ); } );
|
|
|
+ dom.controlsUp.forEach( function( el ) { el.addEventListener( eventName, onNavigateUpClicked, false ); } );
|
|
|
+ dom.controlsDown.forEach( function( el ) { el.addEventListener( eventName, onNavigateDownClicked, false ); } );
|
|
|
+ dom.controlsPrev.forEach( function( el ) { el.addEventListener( eventName, onNavigatePrevClicked, false ); } );
|
|
|
+ dom.controlsNext.forEach( function( el ) { el.addEventListener( eventName, onNavigateNextClicked, false ); } );
|
|
|
+ } );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Unbinds all event listeners.
|
|
|
+ */
|
|
|
+ function removeEventListeners() {
|
|
|
+
|
|
|
+ eventsAreBound = false;
|
|
|
+
|
|
|
+ document.removeEventListener( 'keydown', onDocumentKeyDown, false );
|
|
|
+ window.removeEventListener( 'hashchange', onWindowHashChange, false );
|
|
|
+ window.removeEventListener( 'resize', onWindowResize, false );
|
|
|
+
|
|
|
+ dom.wrapper.removeEventListener( 'touchstart', onTouchStart, false );
|
|
|
+ dom.wrapper.removeEventListener( 'touchmove', onTouchMove, false );
|
|
|
+ dom.wrapper.removeEventListener( 'touchend', onTouchEnd, false );
|
|
|
+
|
|
|
+ if( window.navigator.msPointerEnabled ) {
|
|
|
+ dom.wrapper.removeEventListener( 'MSPointerDown', onPointerDown, false );
|
|
|
+ dom.wrapper.removeEventListener( 'MSPointerMove', onPointerMove, false );
|
|
|
+ dom.wrapper.removeEventListener( 'MSPointerUp', onPointerUp, false );
|
|
|
+ }
|
|
|
+
|
|
|
+ if ( config.progress && dom.progress ) {
|
|
|
+ dom.progress.removeEventListener( 'click', onProgressClicked, false );
|
|
|
+ }
|
|
|
+
|
|
|
+ [ 'touchstart', 'click' ].forEach( function( eventName ) {
|
|
|
+ dom.controlsLeft.forEach( function( el ) { el.removeEventListener( eventName, onNavigateLeftClicked, false ); } );
|
|
|
+ dom.controlsRight.forEach( function( el ) { el.removeEventListener( eventName, onNavigateRightClicked, false ); } );
|
|
|
+ dom.controlsUp.forEach( function( el ) { el.removeEventListener( eventName, onNavigateUpClicked, false ); } );
|
|
|
+ dom.controlsDown.forEach( function( el ) { el.removeEventListener( eventName, onNavigateDownClicked, false ); } );
|
|
|
+ dom.controlsPrev.forEach( function( el ) { el.removeEventListener( eventName, onNavigatePrevClicked, false ); } );
|
|
|
+ dom.controlsNext.forEach( function( el ) { el.removeEventListener( eventName, onNavigateNextClicked, false ); } );
|
|
|
+ } );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Extend object a with the properties of object b.
|
|
|
+ * If there's a conflict, object b takes precedence.
|
|
|
+ */
|
|
|
+ function extend( a, b ) {
|
|
|
+
|
|
|
+ for( var i in b ) {
|
|
|
+ a[ i ] = b[ i ];
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Converts the target object to an array.
|
|
|
+ */
|
|
|
+ function toArray( o ) {
|
|
|
+
|
|
|
+ return Array.prototype.slice.call( o );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 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 );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Applies a CSS transform to the target element.
|
|
|
+ */
|
|
|
+ function transformElement( element, transform ) {
|
|
|
+
|
|
|
+ element.style.WebkitTransform = transform;
|
|
|
+ element.style.MozTransform = transform;
|
|
|
+ element.style.msTransform = transform;
|
|
|
+ element.style.OTransform = transform;
|
|
|
+ element.style.transform = transform;
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Retrieves the height of the given element by looking
|
|
|
+ * at the position and height of its immediate children.
|
|
|
+ */
|
|
|
+ function getAbsoluteHeight( element ) {
|
|
|
+
|
|
|
+ var height = 0;
|
|
|
+
|
|
|
+ if( element ) {
|
|
|
+ var absoluteChildren = 0;
|
|
|
+
|
|
|
+ toArray( element.childNodes ).forEach( function( child ) {
|
|
|
+
|
|
|
+ if( typeof child.offsetTop === 'number' && child.style ) {
|
|
|
+ // Count # of abs children
|
|
|
+ if( child.style.position === 'absolute' ) {
|
|
|
+ absoluteChildren += 1;
|
|
|
+ }
|
|
|
+
|
|
|
+ height = Math.max( height, child.offsetTop + child.offsetHeight );
|
|
|
+ }
|
|
|
+
|
|
|
+ } );
|
|
|
+
|
|
|
+ // If there are no absolute children, use offsetHeight
|
|
|
+ if( absoluteChildren === 0 ) {
|
|
|
+ height = element.offsetHeight;
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ return height;
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Returns the remaining height within the parent of the
|
|
|
+ * target element after subtracting the height of all
|
|
|
+ * siblings.
|
|
|
+ *
|
|
|
+ * remaining height = [parent height] - [ siblings height]
|
|
|
+ */
|
|
|
+ function getRemainingHeight( element, height ) {
|
|
|
+
|
|
|
+ height = height || 0;
|
|
|
+
|
|
|
+ if( element ) {
|
|
|
+ var parent = element.parentNode;
|
|
|
+ var siblings = parent.childNodes;
|
|
|
+
|
|
|
+ // Subtract the height of each sibling
|
|
|
+ toArray( siblings ).forEach( function( sibling ) {
|
|
|
+
|
|
|
+ if( typeof sibling.offsetHeight === 'number' && sibling !== element ) {
|
|
|
+
|
|
|
+ var styles = window.getComputedStyle( sibling ),
|
|
|
+ marginTop = parseInt( styles.marginTop, 10 ),
|
|
|
+ marginBottom = parseInt( styles.marginBottom, 10 );
|
|
|
+
|
|
|
+ height -= sibling.offsetHeight + marginTop + marginBottom;
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ } );
|
|
|
+
|
|
|
+ var elementStyles = window.getComputedStyle( element );
|
|
|
+
|
|
|
+ // Subtract the margins of the target element
|
|
|
+ height -= parseInt( elementStyles.marginTop, 10 ) +
|
|
|
+ parseInt( elementStyles.marginBottom, 10 );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ return height;
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Checks if this instance is being used to print a PDF.
|
|
|
+ */
|
|
|
+ function isPrintingPDF() {
|
|
|
+
|
|
|
+ return ( /print-pdf/gi ).test( window.location.search );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Hides the address bar if we're on a mobile device.
|
|
|
+ */
|
|
|
+ function hideAddressBar() {
|
|
|
+
|
|
|
+ if( config.hideAddressBar && isMobileDevice ) {
|
|
|
+ // Events that should trigger the address bar to hide
|
|
|
+ window.addEventListener( 'load', removeAddressBar, false );
|
|
|
+ window.addEventListener( 'orientationchange', removeAddressBar, false );
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Causes the address bar to hide on mobile devices,
|
|
|
+ * more vertical space ftw.
|
|
|
+ */
|
|
|
+ function removeAddressBar() {
|
|
|
+
|
|
|
+ setTimeout( function() {
|
|
|
+ window.scrollTo( 0, 1 );
|
|
|
+ }, 10 );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 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 enableRollingLinks() {
|
|
|
+
|
|
|
+ if( features.transforms3d && !( 'msPerspective' in document.body.style ) ) {
|
|
|
+ var anchors = document.querySelectorAll( SLIDES_SELECTOR + ' a:not(.image)' );
|
|
|
+
|
|
|
+ for( var i = 0, len = anchors.length; i < len; i++ ) {
|
|
|
+ var anchor = anchors[i];
|
|
|
+
|
|
|
+ if( anchor.textContent && !anchor.querySelector( '*' ) && ( !anchor.className || !anchor.classList.contains( anchor, 'roll' ) ) ) {
|
|
|
+ var span = document.createElement('span');
|
|
|
+ span.setAttribute('data-title', anchor.text);
|
|
|
+ span.innerHTML = anchor.innerHTML;
|
|
|
+
|
|
|
+ anchor.classList.add( 'roll' );
|
|
|
+ anchor.innerHTML = '';
|
|
|
+ anchor.appendChild(span);
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Unwrap all 3D links.
|
|
|
+ */
|
|
|
+ function disableRollingLinks() {
|
|
|
+
|
|
|
+ var anchors = document.querySelectorAll( SLIDES_SELECTOR + ' a.roll' );
|
|
|
+
|
|
|
+ for( var i = 0, len = anchors.length; i < len; i++ ) {
|
|
|
+ var anchor = anchors[i];
|
|
|
+ var span = anchor.querySelector( 'span' );
|
|
|
+
|
|
|
+ if( span ) {
|
|
|
+ anchor.classList.remove( 'roll' );
|
|
|
+ anchor.innerHTML = span.innerHTML;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Bind preview frame links.
|
|
|
+ */
|
|
|
+ function enablePreviewLinks( selector ) {
|
|
|
+
|
|
|
+ var anchors = toArray( document.querySelectorAll( selector ? selector : 'a' ) );
|
|
|
+
|
|
|
+ anchors.forEach( function( element ) {
|
|
|
+ if( /^(http|www)/gi.test( element.getAttribute( 'href' ) ) ) {
|
|
|
+ element.addEventListener( 'click', onPreviewLinkClicked, false );
|
|
|
+ }
|
|
|
+ } );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Unbind preview frame links.
|
|
|
+ */
|
|
|
+ function disablePreviewLinks() {
|
|
|
+
|
|
|
+ var anchors = toArray( document.querySelectorAll( 'a' ) );
|
|
|
+
|
|
|
+ anchors.forEach( function( element ) {
|
|
|
+ if( /^(http|www)/gi.test( element.getAttribute( 'href' ) ) ) {
|
|
|
+ element.removeEventListener( 'click', onPreviewLinkClicked, false );
|
|
|
+ }
|
|
|
+ } );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Opens a preview window for the target URL.
|
|
|
+ */
|
|
|
+ function openPreview( url ) {
|
|
|
+
|
|
|
+ closePreview();
|
|
|
+
|
|
|
+ dom.preview = document.createElement( 'div' );
|
|
|
+ dom.preview.classList.add( 'preview-link-overlay' );
|
|
|
+ dom.wrapper.appendChild( dom.preview );
|
|
|
+
|
|
|
+ dom.preview.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>',
|
|
|
+ '</div>'
|
|
|
+ ].join('');
|
|
|
+
|
|
|
+ dom.preview.querySelector( 'iframe' ).addEventListener( 'load', function( event ) {
|
|
|
+ dom.preview.classList.add( 'loaded' );
|
|
|
+ }, false );
|
|
|
+
|
|
|
+ dom.preview.querySelector( '.close' ).addEventListener( 'click', function( event ) {
|
|
|
+ closePreview();
|
|
|
+ event.preventDefault();
|
|
|
+ }, false );
|
|
|
+
|
|
|
+ dom.preview.querySelector( '.external' ).addEventListener( 'click', function( event ) {
|
|
|
+ closePreview();
|
|
|
+ }, false );
|
|
|
+
|
|
|
+ setTimeout( function() {
|
|
|
+ dom.preview.classList.add( 'visible' );
|
|
|
+ }, 1 );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Closes the iframe preview window.
|
|
|
+ */
|
|
|
+ function closePreview() {
|
|
|
+
|
|
|
+ if( dom.preview ) {
|
|
|
+ dom.preview.setAttribute( 'src', '' );
|
|
|
+ dom.preview.parentNode.removeChild( dom.preview );
|
|
|
+ dom.preview = null;
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Applies JavaScript-controlled layout rules to the
|
|
|
+ * presentation.
|
|
|
+ */
|
|
|
+ function layout() {
|
|
|
+
|
|
|
+ if( dom.wrapper && !isPrintingPDF() ) {
|
|
|
+
|
|
|
+ // Available space to scale within
|
|
|
+ var availableWidth = dom.wrapper.offsetWidth,
|
|
|
+ availableHeight = dom.wrapper.offsetHeight;
|
|
|
+
|
|
|
+ // Reduce available space by margin
|
|
|
+ availableWidth -= ( availableHeight * config.margin );
|
|
|
+ availableHeight -= ( availableHeight * config.margin );
|
|
|
+
|
|
|
+ // Dimensions of the content
|
|
|
+ var slideWidth = config.width,
|
|
|
+ slideHeight = config.height,
|
|
|
+ slidePadding = 20; // TODO Dig this out of DOM
|
|
|
+
|
|
|
+ // Layout the contents of the slides
|
|
|
+ layoutSlideContents( config.width, config.height, slidePadding );
|
|
|
+
|
|
|
+ // Slide width may be a percentage of available width
|
|
|
+ if( typeof slideWidth === 'string' && /%$/.test( slideWidth ) ) {
|
|
|
+ slideWidth = parseInt( slideWidth, 10 ) / 100 * availableWidth;
|
|
|
+ }
|
|
|
+
|
|
|
+ // Slide height may be a percentage of available height
|
|
|
+ if( typeof slideHeight === 'string' && /%$/.test( slideHeight ) ) {
|
|
|
+ slideHeight = parseInt( slideHeight, 10 ) / 100 * availableHeight;
|
|
|
+ }
|
|
|
+
|
|
|
+ dom.slides.style.width = slideWidth + 'px';
|
|
|
+ dom.slides.style.height = slideHeight + 'px';
|
|
|
+
|
|
|
+ // Determine scale of content to fit within available space
|
|
|
+ scale = Math.min( availableWidth / slideWidth, availableHeight / slideHeight );
|
|
|
+
|
|
|
+ // Respect max/min scale settings
|
|
|
+ scale = Math.max( scale, config.minScale );
|
|
|
+ scale = Math.min( scale, config.maxScale );
|
|
|
+
|
|
|
+ // Prefer applying scale via zoom since Chrome blurs scaled content
|
|
|
+ // with nested transforms
|
|
|
+ if( typeof dom.slides.style.zoom !== 'undefined' && !navigator.userAgent.match( /(iphone|ipod|ipad|android)/gi ) ) {
|
|
|
+ dom.slides.style.zoom = scale;
|
|
|
+ }
|
|
|
+ // Apply scale transform as a fallback
|
|
|
+ else {
|
|
|
+ transformElement( dom.slides, 'translate(-50%, -50%) scale('+ scale +') translate(50%, 50%)' );
|
|
|
+ }
|
|
|
+
|
|
|
+ // Select all slides, vertical and horizontal
|
|
|
+ var slides = toArray( document.querySelectorAll( SLIDES_SELECTOR ) );
|
|
|
+
|
|
|
+ for( var i = 0, len = slides.length; i < len; i++ ) {
|
|
|
+ var 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( - ( getAbsoluteHeight( slide ) / 2 ) - slidePadding, -slideHeight / 2 ) + 'px';
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ slide.style.top = '';
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ updateProgress();
|
|
|
+ updateParallax();
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Applies layout logic to the contents of all slides in
|
|
|
+ * the presentation.
|
|
|
+ */
|
|
|
+ function layoutSlideContents( width, height, padding ) {
|
|
|
+
|
|
|
+ // Handle sizing of elements with the 'stretch' class
|
|
|
+ toArray( dom.slides.querySelectorAll( 'section > .stretch' ) ).forEach( function( element ) {
|
|
|
+
|
|
|
+ // Determine how much vertical space we can use
|
|
|
+ var remainingHeight = getRemainingHeight( element, ( height - ( padding * 2 ) ) );
|
|
|
+
|
|
|
+ // Consider the aspect ratio of media elements
|
|
|
+ if( /(img|video)/gi.test( element.nodeName ) ) {
|
|
|
+ var nw = element.naturalWidth || element.videoWidth,
|
|
|
+ nh = element.naturalHeight || element.videoHeight;
|
|
|
+
|
|
|
+ var 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';
|
|
|
+ }
|
|
|
+
|
|
|
+ } );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 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( 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
|
|
|
+ var 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.
|
|
|
+ *
|
|
|
+ * Experimental feature, might be dropped if perf
|
|
|
+ * can't be improved.
|
|
|
+ */
|
|
|
+ function activateOverview() {
|
|
|
+
|
|
|
+ // Only proceed if enabled in config
|
|
|
+ if( config.overview ) {
|
|
|
+
|
|
|
+ // Don't auto-slide while in overview mode
|
|
|
+ cancelAutoSlide();
|
|
|
+
|
|
|
+ var wasActive = dom.wrapper.classList.contains( 'overview' );
|
|
|
+
|
|
|
+ // Vary the depth of the overview based on screen size
|
|
|
+ var depth = window.innerWidth < 400 ? 1000 : 2500;
|
|
|
+
|
|
|
+ dom.wrapper.classList.add( 'overview' );
|
|
|
+ dom.wrapper.classList.remove( 'overview-deactivating' );
|
|
|
+
|
|
|
+ clearTimeout( activateOverviewTimeout );
|
|
|
+ clearTimeout( deactivateOverviewTimeout );
|
|
|
+
|
|
|
+ // Not the pretties solution, but need to let the overview
|
|
|
+ // class apply first so that slides are measured accurately
|
|
|
+ // before we can position 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],
|
|
|
+ hoffset = config.rtl ? -105 : 105;
|
|
|
+
|
|
|
+ hslide.setAttribute( 'data-index-h', i );
|
|
|
+
|
|
|
+ // Apply CSS transform
|
|
|
+ transformElement( hslide, 'translateZ(-'+ depth +'px) translate(' + ( ( i - indexh ) * hoffset ) + '%, 0%)' );
|
|
|
+
|
|
|
+ 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];
|
|
|
+
|
|
|
+ vslide.setAttribute( 'data-index-h', i );
|
|
|
+ vslide.setAttribute( 'data-index-v', j );
|
|
|
+
|
|
|
+ // Apply CSS transform
|
|
|
+ transformElement( vslide, 'translate(0%, ' + ( ( j - verticalIndex ) * 105 ) + '%)' );
|
|
|
+
|
|
|
+ // Navigate to this slide on click
|
|
|
+ vslide.addEventListener( 'click', onOverviewSlideClicked, true );
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+ else {
|
|
|
+
|
|
|
+ // Navigate to this slide on click
|
|
|
+ hslide.addEventListener( 'click', onOverviewSlideClicked, true );
|
|
|
+
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ updateSlidesVisibility();
|
|
|
+
|
|
|
+ layout();
|
|
|
+
|
|
|
+ if( !wasActive ) {
|
|
|
+ // Notify observers of the overview showing
|
|
|
+ dispatchEvent( 'overviewshown', {
|
|
|
+ 'indexh': indexh,
|
|
|
+ 'indexv': indexv,
|
|
|
+ 'currentSlide': currentSlide
|
|
|
+ } );
|
|
|
+ }
|
|
|
+
|
|
|
+ }, 10 );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Exits the slide overview and enters the currently
|
|
|
+ * active slide.
|
|
|
+ */
|
|
|
+ function deactivateOverview() {
|
|
|
+
|
|
|
+ // Only proceed if enabled in config
|
|
|
+ if( config.overview ) {
|
|
|
+
|
|
|
+ clearTimeout( activateOverviewTimeout );
|
|
|
+ clearTimeout( deactivateOverviewTimeout );
|
|
|
+
|
|
|
+ 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' );
|
|
|
+
|
|
|
+ deactivateOverviewTimeout = setTimeout( function () {
|
|
|
+ dom.wrapper.classList.remove( 'overview-deactivating' );
|
|
|
+ }, 1 );
|
|
|
+
|
|
|
+ // Select all slides
|
|
|
+ toArray( document.querySelectorAll( SLIDES_SELECTOR ) ).forEach( function( slide ) {
|
|
|
+ // Resets all transforms to use the external styles
|
|
|
+ transformElement( slide, '' );
|
|
|
+
|
|
|
+ slide.removeEventListener( 'click', onOverviewSlideClicked, true );
|
|
|
+ } );
|
|
|
+
|
|
|
+ slide( indexh, indexv );
|
|
|
+
|
|
|
+ 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 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 {
|
|
|
+ isOverview() ? deactivateOverview() : activateOverview();
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Checks if the overview is currently active.
|
|
|
+ *
|
|
|
+ * @return {Boolean} true if the overview is active,
|
|
|
+ * false otherwise
|
|
|
+ */
|
|
|
+ function isOverview() {
|
|
|
+
|
|
|
+ return dom.wrapper.classList.contains( 'overview' );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Checks if the current or specified slide is vertical
|
|
|
+ * (nested within another slide).
|
|
|
+ *
|
|
|
+ * @param {HTMLElement} slide [optional] The slide to check
|
|
|
+ * orientation of
|
|
|
+ */
|
|
|
+ function isVerticalSlide( slide ) {
|
|
|
+
|
|
|
+ // Prefer slide argument, otherwise use current slide
|
|
|
+ slide = slide ? slide : currentSlide;
|
|
|
+
|
|
|
+ return slide && slide.parentNode && !!slide.parentNode.nodeName.match( /section/i );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 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.webkitRequestFullScreen ||
|
|
|
+ element.mozRequestFullScreen ||
|
|
|
+ element.msRequestFullScreen;
|
|
|
+
|
|
|
+ if( requestMethod ) {
|
|
|
+ requestMethod.apply( element );
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Enters the paused mode which fades everything on screen to
|
|
|
+ * black.
|
|
|
+ */
|
|
|
+ function pause() {
|
|
|
+
|
|
|
+ var wasPaused = dom.wrapper.classList.contains( 'paused' );
|
|
|
+
|
|
|
+ cancelAutoSlide();
|
|
|
+ dom.wrapper.classList.add( 'paused' );
|
|
|
+
|
|
|
+ if( wasPaused === false ) {
|
|
|
+ dispatchEvent( 'paused' );
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Exits from the paused mode.
|
|
|
+ */
|
|
|
+ function resume() {
|
|
|
+
|
|
|
+ var 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() {
|
|
|
+
|
|
|
+ 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
|
|
|
+ * @param {int} o Optional 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
|
|
|
+ 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 || 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();
|
|
|
+
|
|
|
+ // Apply the new state
|
|
|
+ stateLoop: for( var i = 0, len = state.length; i < len; i++ ) {
|
|
|
+ // Check if this state existed on the previous slide. If it
|
|
|
+ // did, we will avoid adding it repeatedly
|
|
|
+ for( var j = 0; j < stateBefore.length; j++ ) {
|
|
|
+ if( stateBefore[j] === state[i] ) {
|
|
|
+ stateBefore.splice( j, 1 );
|
|
|
+ continue stateLoop;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ document.documentElement.classList.add( state[i] );
|
|
|
+
|
|
|
+ // Dispatch custom event matching the state's name
|
|
|
+ dispatchEvent( state[i] );
|
|
|
+ }
|
|
|
+
|
|
|
+ // Clean up the remains of the previous state
|
|
|
+ while( stateBefore.length ) {
|
|
|
+ document.documentElement.classList.remove( stateBefore.pop() );
|
|
|
+ }
|
|
|
+
|
|
|
+ // If the overview is active, re-activate it to update positions
|
|
|
+ if( isOverview() ) {
|
|
|
+ activateOverview();
|
|
|
+ }
|
|
|
+
|
|
|
+ // 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( typeof f !== 'undefined' ) {
|
|
|
+ navigateFragment( f );
|
|
|
+ }
|
|
|
+
|
|
|
+ // Dispatch an event if the slide changed
|
|
|
+ var slideChanged = ( indexh !== indexhBefore || indexv !== indexvBefore );
|
|
|
+ if( slideChanged ) {
|
|
|
+ dispatchEvent( 'slidechanged', {
|
|
|
+ 'indexh': indexh,
|
|
|
+ 'indexv': indexv,
|
|
|
+ 'previousSlide': previousSlide,
|
|
|
+ 'currentSlide': currentSlide,
|
|
|
+ 'origin': o
|
|
|
+ } );
|
|
|
+ }
|
|
|
+ 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' );
|
|
|
+
|
|
|
+ // Reset all slides upon navigate to home
|
|
|
+ // Issue: #285
|
|
|
+ if ( document.querySelector( HOME_SLIDE_SELECTOR ).classList.contains( 'present' ) ) {
|
|
|
+ // Launch async task
|
|
|
+ setTimeout( function () {
|
|
|
+ var slides = toArray( document.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR + '.stack') ), i;
|
|
|
+ for( i in slides ) {
|
|
|
+ if( slides[i] ) {
|
|
|
+ // Reset stack
|
|
|
+ setPreviousVerticalIndex( slides[i], 0 );
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }, 0 );
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ // Handle embedded content
|
|
|
+ if( slideChanged ) {
|
|
|
+ stopEmbeddedContent( previousSlide );
|
|
|
+ startEmbeddedContent( currentSlide );
|
|
|
+ }
|
|
|
+
|
|
|
+ updateControls();
|
|
|
+ updateProgress();
|
|
|
+ updateBackground();
|
|
|
+ updateParallax();
|
|
|
+ updateSlideNumber();
|
|
|
+
|
|
|
+ // Update the URL hash
|
|
|
+ writeURL();
|
|
|
+
|
|
|
+ cueAutoSlide();
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 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();
|
|
|
+
|
|
|
+ sortAllFragments();
|
|
|
+
|
|
|
+ updateControls();
|
|
|
+ updateProgress();
|
|
|
+ updateBackground( true );
|
|
|
+ updateSlideNumber();
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Resets all vertical slides so that only the first
|
|
|
+ * is visible.
|
|
|
+ */
|
|
|
+ function resetVerticalSlides() {
|
|
|
+
|
|
|
+ var horizontalSlides = toArray( document.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) );
|
|
|
+ horizontalSlides.forEach( function( horizontalSlide ) {
|
|
|
+
|
|
|
+ var verticalSlides = toArray( horizontalSlide.querySelectorAll( 'section' ) );
|
|
|
+ verticalSlides.forEach( function( verticalSlide, y ) {
|
|
|
+
|
|
|
+ if( y > 0 ) {
|
|
|
+ verticalSlide.classList.remove( 'present' );
|
|
|
+ verticalSlide.classList.remove( 'past' );
|
|
|
+ verticalSlide.classList.add( 'future' );
|
|
|
+ }
|
|
|
+
|
|
|
+ } );
|
|
|
+
|
|
|
+ } );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Sorts and formats all of fragments in the
|
|
|
+ * presentation.
|
|
|
+ */
|
|
|
+ function sortAllFragments() {
|
|
|
+
|
|
|
+ var horizontalSlides = toArray( document.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) );
|
|
|
+ horizontalSlides.forEach( function( horizontalSlide ) {
|
|
|
+
|
|
|
+ var verticalSlides = toArray( horizontalSlide.querySelectorAll( 'section' ) );
|
|
|
+ verticalSlides.forEach( function( verticalSlide, y ) {
|
|
|
+
|
|
|
+ sortFragments( verticalSlide.querySelectorAll( '.fragment' ) );
|
|
|
+
|
|
|
+ } );
|
|
|
+
|
|
|
+ if( verticalSlides.length === 0 ) sortFragments( horizontalSlide.querySelectorAll( '.fragment' ) );
|
|
|
+
|
|
|
+ } );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 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];
|
|
|
+
|
|
|
+ var reverse = config.rtl && !isVerticalSlide( element );
|
|
|
+
|
|
|
+ element.classList.remove( 'past' );
|
|
|
+ element.classList.remove( 'present' );
|
|
|
+ element.classList.remove( 'future' );
|
|
|
+
|
|
|
+ // http://www.w3.org/html/wg/drafts/html/master/editing.html#the-hidden-attribute
|
|
|
+ element.setAttribute( 'hidden', '' );
|
|
|
+
|
|
|
+ if( i < index ) {
|
|
|
+ // Any element previous to index is given the 'past' class
|
|
|
+ element.classList.add( reverse ? 'future' : 'past' );
|
|
|
+
|
|
|
+ var pastFragments = toArray( element.querySelectorAll( '.fragment' ) );
|
|
|
+
|
|
|
+ // Show all fragments on prior slides
|
|
|
+ while( pastFragments.length ) {
|
|
|
+ var pastFragment = pastFragments.pop();
|
|
|
+ pastFragment.classList.add( 'visible' );
|
|
|
+ pastFragment.classList.remove( 'current-fragment' );
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else if( i > index ) {
|
|
|
+ // Any element subsequent to index is given the 'future' class
|
|
|
+ element.classList.add( reverse ? 'past' : 'future' );
|
|
|
+
|
|
|
+ var futureFragments = toArray( element.querySelectorAll( '.fragment.visible' ) );
|
|
|
+
|
|
|
+ // No fragments in future slides should be visible ahead of time
|
|
|
+ while( futureFragments.length ) {
|
|
|
+ var futureFragment = futureFragments.pop();
|
|
|
+ futureFragment.classList.remove( 'visible' );
|
|
|
+ futureFragment.classList.remove( 'current-fragment' );
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ // If this element contains vertical slides
|
|
|
+ if( element.querySelector( 'section' ) ) {
|
|
|
+ element.classList.add( 'stack' );
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ // Mark the current slide as present
|
|
|
+ slides[index].classList.add( 'present' );
|
|
|
+ slides[index].removeAttribute( 'hidden' );
|
|
|
+
|
|
|
+ // 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( ' ' ) );
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+ 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
|
|
|
+ var horizontalSlides = toArray( document.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ),
|
|
|
+ horizontalSlidesLength = horizontalSlides.length,
|
|
|
+ distanceX,
|
|
|
+ distanceY;
|
|
|
+
|
|
|
+ if( horizontalSlidesLength ) {
|
|
|
+
|
|
|
+ // The number of steps away from the present slide that will
|
|
|
+ // be visible
|
|
|
+ var viewDistance = isOverview() ? 10 : config.viewDistance;
|
|
|
+
|
|
|
+ // Limit view distance on weaker devices
|
|
|
+ if( isMobileDevice ) {
|
|
|
+ viewDistance = isOverview() ? 6 : 1;
|
|
|
+ }
|
|
|
+
|
|
|
+ for( var x = 0; x < horizontalSlidesLength; x++ ) {
|
|
|
+ var horizontalSlide = horizontalSlides[x];
|
|
|
+
|
|
|
+ var verticalSlides = toArray( horizontalSlide.querySelectorAll( 'section' ) ),
|
|
|
+ verticalSlidesLength = verticalSlides.length;
|
|
|
+
|
|
|
+ // Loops so that it measures 1 between the first and last slides
|
|
|
+ distanceX = Math.abs( ( indexh - x ) % ( horizontalSlidesLength - viewDistance ) ) || 0;
|
|
|
+
|
|
|
+ // Show the horizontal slide if it's within the view distance
|
|
|
+ horizontalSlide.style.display = distanceX > viewDistance ? 'none' : 'block';
|
|
|
+
|
|
|
+ if( verticalSlidesLength ) {
|
|
|
+
|
|
|
+ var oy = getPreviousVerticalIndex( horizontalSlide );
|
|
|
+
|
|
|
+ for( var y = 0; y < verticalSlidesLength; y++ ) {
|
|
|
+ var verticalSlide = verticalSlides[y];
|
|
|
+
|
|
|
+ distanceY = x === indexh ? Math.abs( indexv - y ) : Math.abs( y - oy );
|
|
|
+
|
|
|
+ verticalSlide.style.display = ( distanceX + distanceY ) > viewDistance ? 'none' : 'block';
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 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 slide number div to reflect the current slide.
|
|
|
+ */
|
|
|
+ function updateSlideNumber() {
|
|
|
+
|
|
|
+ // Update slide number if enabled
|
|
|
+ if( config.slideNumber && dom.slideNumber) {
|
|
|
+
|
|
|
+ // Display the number of the page using 'indexh - indexv' format
|
|
|
+ var indexString = indexh;
|
|
|
+ if( indexv > 0 ) {
|
|
|
+ indexString += ' - ' + indexv;
|
|
|
+ }
|
|
|
+
|
|
|
+ dom.slideNumber.innerHTML = indexString;
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Updates the state of all control/navigation arrows.
|
|
|
+ */
|
|
|
+ function updateControls() {
|
|
|
+
|
|
|
+ var routes = availableRoutes();
|
|
|
+ var fragments = availableFragments();
|
|
|
+
|
|
|
+ // 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' );
|
|
|
+ node.classList.remove( 'fragmented' );
|
|
|
+ } );
|
|
|
+
|
|
|
+ // 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' ); } );
|
|
|
+
|
|
|
+ // Highlight fragment directions
|
|
|
+ if( currentSlide ) {
|
|
|
+
|
|
|
+ // Always apply fragment decorator to prev/next buttons
|
|
|
+ if( fragments.prev ) dom.controlsPrev.forEach( function( el ) { el.classList.add( 'fragmented', 'enabled' ); } );
|
|
|
+ if( fragments.next ) dom.controlsNext.forEach( function( el ) { el.classList.add( 'fragmented', 'enabled' ); } );
|
|
|
+
|
|
|
+ // Apply fragment decorators to directional buttons based on
|
|
|
+ // what slide axis they are in
|
|
|
+ if( isVerticalSlide( currentSlide ) ) {
|
|
|
+ if( fragments.prev ) dom.controlsUp.forEach( function( el ) { el.classList.add( 'fragmented', 'enabled' ); } );
|
|
|
+ if( fragments.next ) dom.controlsDown.forEach( function( el ) { el.classList.add( 'fragmented', 'enabled' ); } );
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ if( fragments.prev ) dom.controlsLeft.forEach( function( el ) { el.classList.add( 'fragmented', 'enabled' ); } );
|
|
|
+ if( fragments.next ) dom.controlsRight.forEach( function( el ) { el.classList.add( 'fragmented', 'enabled' ); } );
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 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 ) {
|
|
|
+
|
|
|
+ var currentBackground = null;
|
|
|
+
|
|
|
+ // Reverse past/future classes when in RTL mode
|
|
|
+ var 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( function( backgroundh, h ) {
|
|
|
+
|
|
|
+ if( h < indexh ) {
|
|
|
+ backgroundh.className = 'slide-background ' + horizontalPast;
|
|
|
+ }
|
|
|
+ else if ( h > indexh ) {
|
|
|
+ backgroundh.className = 'slide-background ' + horizontalFuture;
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ backgroundh.className = 'slide-background present';
|
|
|
+
|
|
|
+ // Store a reference to the current background element
|
|
|
+ currentBackground = backgroundh;
|
|
|
+ }
|
|
|
+
|
|
|
+ if( includeAll || h === indexh ) {
|
|
|
+ toArray( backgroundh.childNodes ).forEach( function( backgroundv, v ) {
|
|
|
+
|
|
|
+ if( v < indexv ) {
|
|
|
+ backgroundv.className = 'slide-background past';
|
|
|
+ }
|
|
|
+ else if ( v > indexv ) {
|
|
|
+ backgroundv.className = 'slide-background future';
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ backgroundv.className = 'slide-background present';
|
|
|
+
|
|
|
+ // Only if this is the present horizontal and vertical slide
|
|
|
+ if( h === indexh ) currentBackground = backgroundv;
|
|
|
+ }
|
|
|
+
|
|
|
+ } );
|
|
|
+ }
|
|
|
+
|
|
|
+ } );
|
|
|
+
|
|
|
+ // Don't transition between identical backgrounds. This
|
|
|
+ // prevents unwanted flicker.
|
|
|
+ if( currentBackground ) {
|
|
|
+ var previousBackgroundHash = previousBackground ? previousBackground.getAttribute( 'data-background-hash' ) : null;
|
|
|
+ var currentBackgroundHash = currentBackground.getAttribute( 'data-background-hash' );
|
|
|
+ if( currentBackgroundHash && currentBackgroundHash === previousBackgroundHash && currentBackground !== previousBackground ) {
|
|
|
+ dom.background.classList.add( 'no-transition' );
|
|
|
+ }
|
|
|
+
|
|
|
+ previousBackground = currentBackground;
|
|
|
+ }
|
|
|
+
|
|
|
+ // Allow the first background to apply without transition
|
|
|
+ setTimeout( function() {
|
|
|
+ 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 ) {
|
|
|
+
|
|
|
+ var horizontalSlides = document.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ),
|
|
|
+ verticalSlides = document.querySelectorAll( VERTICAL_SLIDES_SELECTOR );
|
|
|
+
|
|
|
+ var 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 );
|
|
|
+ }
|
|
|
+
|
|
|
+ var slideWidth = dom.background.offsetWidth;
|
|
|
+ var horizontalSlideCount = horizontalSlides.length;
|
|
|
+ var horizontalOffset = -( backgroundWidth - slideWidth ) / ( horizontalSlideCount-1 ) * indexh;
|
|
|
+
|
|
|
+ var slideHeight = dom.background.offsetHeight;
|
|
|
+ var verticalSlideCount = verticalSlides.length;
|
|
|
+ var verticalOffset = verticalSlideCount > 0 ? -( backgroundHeight - slideHeight ) / ( verticalSlideCount-1 ) * indexv : 0;
|
|
|
+
|
|
|
+ dom.background.style.backgroundPosition = horizontalOffset + 'px ' + verticalOffset + 'px';
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 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 );
|
|
|
+
|
|
|
+ var routes = {
|
|
|
+ left: indexh > 0 || config.loop,
|
|
|
+ right: indexh < horizontalSlides.length - 1 || config.loop,
|
|
|
+ up: indexv > 0,
|
|
|
+ down: indexv < verticalSlides.length - 1
|
|
|
+ };
|
|
|
+
|
|
|
+ // reverse horizontal controls for rtl
|
|
|
+ if( config.rtl ) {
|
|
|
+ var left = routes.left;
|
|
|
+ routes.left = routes.right;
|
|
|
+ routes.right = left;
|
|
|
+ }
|
|
|
+
|
|
|
+ return routes;
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Returns an object describing the available fragment
|
|
|
+ * directions.
|
|
|
+ *
|
|
|
+ * @return {Object} two boolean properties: prev/next
|
|
|
+ */
|
|
|
+ function availableFragments() {
|
|
|
+
|
|
|
+ if( currentSlide && config.fragments ) {
|
|
|
+ var fragments = currentSlide.querySelectorAll( '.fragment' );
|
|
|
+ var hiddenFragments = currentSlide.querySelectorAll( '.fragment:not(.visible)' );
|
|
|
+
|
|
|
+ return {
|
|
|
+ prev: fragments.length - hiddenFragments.length > 0,
|
|
|
+ next: !!hiddenFragments.length
|
|
|
+ };
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ return { prev: false, next: false };
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Start playback of any embedded content inside of
|
|
|
+ * the targeted slide.
|
|
|
+ */
|
|
|
+ function startEmbeddedContent( slide ) {
|
|
|
+
|
|
|
+ if( slide && !isSpeakerNotes() ) {
|
|
|
+ // HTML5 media elements
|
|
|
+ toArray( slide.querySelectorAll( 'video, audio' ) ).forEach( function( el ) {
|
|
|
+ if( el.hasAttribute( 'data-autoplay' ) ) {
|
|
|
+ el.play();
|
|
|
+ }
|
|
|
+ } );
|
|
|
+
|
|
|
+ // iframe embeds
|
|
|
+ toArray( slide.querySelectorAll( 'iframe' ) ).forEach( function( el ) {
|
|
|
+ el.contentWindow.postMessage( 'slide:start', '*' );
|
|
|
+ });
|
|
|
+
|
|
|
+ // YouTube embeds
|
|
|
+ toArray( slide.querySelectorAll( 'iframe[src*="youtube.com/embed/"]' ) ).forEach( function( el ) {
|
|
|
+ if( el.hasAttribute( 'data-autoplay' ) ) {
|
|
|
+ el.contentWindow.postMessage( '{"event":"command","func":"playVideo","args":""}', '*' );
|
|
|
+ }
|
|
|
+ });
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Stop playback of any embedded content inside of
|
|
|
+ * the targeted slide.
|
|
|
+ */
|
|
|
+ function stopEmbeddedContent( slide ) {
|
|
|
+
|
|
|
+ if( slide ) {
|
|
|
+ // HTML5 media elements
|
|
|
+ toArray( slide.querySelectorAll( 'video, audio' ) ).forEach( function( el ) {
|
|
|
+ if( !el.hasAttribute( 'data-ignore' ) ) {
|
|
|
+ el.pause();
|
|
|
+ }
|
|
|
+ } );
|
|
|
+
|
|
|
+ // iframe embeds
|
|
|
+ toArray( slide.querySelectorAll( 'iframe' ) ).forEach( function( el ) {
|
|
|
+ el.contentWindow.postMessage( 'slide:stop', '*' );
|
|
|
+ });
|
|
|
+
|
|
|
+ // YouTube embeds
|
|
|
+ toArray( slide.querySelectorAll( 'iframe[src*="youtube.com/embed/"]' ) ).forEach( function( el ) {
|
|
|
+ if( !el.hasAttribute( 'data-ignore' ) && typeof el.contentWindow.postMessage === 'function' ) {
|
|
|
+ el.contentWindow.postMessage( '{"event":"command","func":"pauseVideo","args":""}', '*' );
|
|
|
+ }
|
|
|
+ });
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Checks if this presentation is running inside of the
|
|
|
+ * speaker notes window.
|
|
|
+ */
|
|
|
+ function isSpeakerNotes() {
|
|
|
+
|
|
|
+ return !!window.location.search.match( /receiver/gi );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 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 || 0, indexv || 0 );
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ // Read the index components of the hash
|
|
|
+ var h = parseInt( bits[0], 10 ) || 0,
|
|
|
+ v = parseInt( bits[1], 10 ) || 0;
|
|
|
+
|
|
|
+ if( h !== indexh || v !== indexv ) {
|
|
|
+ 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>, f: <int> }
|
|
|
+ */
|
|
|
+ function getIndices( slide ) {
|
|
|
+
|
|
|
+ // By default, return the current indices
|
|
|
+ var h = indexh,
|
|
|
+ v = indexv,
|
|
|
+ f;
|
|
|
+
|
|
|
+ // If a slide is specified, return the indices of that slide
|
|
|
+ if( slide ) {
|
|
|
+ var isVertical = isVerticalSlide( slide );
|
|
|
+ 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.querySelectorAll( 'section' ) ).indexOf( slide ), 0 );
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ if( !slide && currentSlide ) {
|
|
|
+ var hasFragments = currentSlide.querySelectorAll( '.fragment' ).length > 0;
|
|
|
+ if( hasFragments ) {
|
|
|
+ var visibleFragments = currentSlide.querySelectorAll( '.fragment.visible' );
|
|
|
+ f = visibleFragments.length - 1;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ return { h: h, v: v, f: f };
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 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.
|
|
|
+ */
|
|
|
+ function sortFragments( fragments ) {
|
|
|
+
|
|
|
+ fragments = toArray( fragments );
|
|
|
+
|
|
|
+ var ordered = [],
|
|
|
+ unordered = [],
|
|
|
+ sorted = [];
|
|
|
+
|
|
|
+ // Group ordered and unordered elements
|
|
|
+ fragments.forEach( function( fragment, i ) {
|
|
|
+ if( fragment.hasAttribute( 'data-fragment-index' ) ) {
|
|
|
+ var 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
|
|
|
+ var index = 0;
|
|
|
+
|
|
|
+ // Push all fragments in their sorted order to an array,
|
|
|
+ // this flattens the groups
|
|
|
+ ordered.forEach( function( group ) {
|
|
|
+ group.forEach( function( fragment ) {
|
|
|
+ sorted.push( fragment );
|
|
|
+ fragment.setAttribute( 'data-fragment-index', index );
|
|
|
+ } );
|
|
|
+
|
|
|
+ index ++;
|
|
|
+ } );
|
|
|
+
|
|
|
+ return sorted;
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 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 ) {
|
|
|
+
|
|
|
+ if( currentSlide && config.fragments ) {
|
|
|
+
|
|
|
+ var fragments = sortFragments( currentSlide.querySelectorAll( '.fragment' ) );
|
|
|
+ if( fragments.length ) {
|
|
|
+
|
|
|
+ // If no index is specified, find the current
|
|
|
+ if( typeof index !== 'number' ) {
|
|
|
+ var lastVisibleFragment = sortFragments( currentSlide.querySelectorAll( '.fragment.visible' ) ).pop();
|
|
|
+
|
|
|
+ if( lastVisibleFragment ) {
|
|
|
+ index = parseInt( lastVisibleFragment.getAttribute( 'data-fragment-index' ) || 0, 10 );
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ index = -1;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ // If an offset is specified, apply it to the index
|
|
|
+ if( typeof offset === 'number' ) {
|
|
|
+ index += offset;
|
|
|
+ }
|
|
|
+
|
|
|
+ var fragmentsShown = [],
|
|
|
+ fragmentsHidden = [];
|
|
|
+
|
|
|
+ toArray( fragments ).forEach( function( element, i ) {
|
|
|
+
|
|
|
+ if( element.hasAttribute( 'data-fragment-index' ) ) {
|
|
|
+ i = parseInt( element.getAttribute( 'data-fragment-index' ), 10 );
|
|
|
+ }
|
|
|
+
|
|
|
+ // Visible fragments
|
|
|
+ if( i <= index ) {
|
|
|
+ if( !element.classList.contains( 'visible' ) ) fragmentsShown.push( element );
|
|
|
+ element.classList.add( 'visible' );
|
|
|
+ element.classList.remove( 'current-fragment' );
|
|
|
+
|
|
|
+ if( i === index ) {
|
|
|
+ element.classList.add( 'current-fragment' );
|
|
|
+ }
|
|
|
+ }
|
|
|
+ // Hidden fragments
|
|
|
+ else {
|
|
|
+ if( element.classList.contains( 'visible' ) ) fragmentsHidden.push( element );
|
|
|
+ element.classList.remove( 'visible' );
|
|
|
+ element.classList.remove( 'current-fragment' );
|
|
|
+ }
|
|
|
+
|
|
|
+
|
|
|
+ } );
|
|
|
+
|
|
|
+ if( fragmentsHidden.length ) {
|
|
|
+ dispatchEvent( 'fragmenthidden', { fragment: fragmentsHidden[0], fragments: fragmentsHidden } );
|
|
|
+ }
|
|
|
+
|
|
|
+ if( fragmentsShown.length ) {
|
|
|
+ dispatchEvent( 'fragmentshown', { fragment: fragmentsShown[0], fragments: fragmentsShown } );
|
|
|
+ }
|
|
|
+
|
|
|
+ updateControls();
|
|
|
+
|
|
|
+ return !!( fragmentsShown.length || fragmentsHidden.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 previousFragment() {
|
|
|
+
|
|
|
+ return navigateFragment( null, -1 );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Cues a new automated slide if enabled in the config.
|
|
|
+ */
|
|
|
+ function cueAutoSlide() {
|
|
|
+
|
|
|
+ cancelAutoSlide();
|
|
|
+
|
|
|
+ if( currentSlide ) {
|
|
|
+
|
|
|
+ var parentAutoSlide = currentSlide.parentNode ? currentSlide.parentNode.getAttribute( 'data-autoslide' ) : null;
|
|
|
+ var slideAutoSlide = currentSlide.getAttribute( 'data-autoslide' );
|
|
|
+
|
|
|
+ // Pick value in the following priority order:
|
|
|
+ // 1. Current slide's data-autoslide
|
|
|
+ // 2. Parent slide's data-autoslide
|
|
|
+ // 3. Global autoSlide setting
|
|
|
+ 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
|
|
|
+ toArray( currentSlide.querySelectorAll( 'video, audio' ) ).forEach( function( el ) {
|
|
|
+ if( el.hasAttribute( 'data-autoplay' ) ) {
|
|
|
+ if( autoSlide && el.duration * 1000 > autoSlide ) {
|
|
|
+ autoSlide = ( el.duration * 1000 ) + 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() || config.loop === true ) ) {
|
|
|
+ autoSlideTimeout = setTimeout( navigateNext, 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() {
|
|
|
+
|
|
|
+ autoSlidePaused = true;
|
|
|
+ clearTimeout( autoSlideTimeout );
|
|
|
+
|
|
|
+ if( autoSlidePlayer ) {
|
|
|
+ autoSlidePlayer.setPlaying( false );
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ function resumeAutoSlide() {
|
|
|
+
|
|
|
+ autoSlidePaused = false;
|
|
|
+ cueAutoSlide();
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ function navigateLeft() {
|
|
|
+
|
|
|
+ // Reverse for RTL
|
|
|
+ if( config.rtl ) {
|
|
|
+ if( ( isOverview() || nextFragment() === false ) && availableRoutes().left ) {
|
|
|
+ slide( indexh + 1 );
|
|
|
+ }
|
|
|
+ }
|
|
|
+ // Normal navigation
|
|
|
+ else if( ( isOverview() || previousFragment() === false ) && availableRoutes().left ) {
|
|
|
+ slide( indexh - 1 );
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ function navigateRight() {
|
|
|
+
|
|
|
+ // Reverse for RTL
|
|
|
+ if( config.rtl ) {
|
|
|
+ if( ( isOverview() || previousFragment() === false ) && availableRoutes().right ) {
|
|
|
+ slide( indexh - 1 );
|
|
|
+ }
|
|
|
+ }
|
|
|
+ // Normal navigation
|
|
|
+ else if( ( isOverview() || nextFragment() === false ) && availableRoutes().right ) {
|
|
|
+ slide( indexh + 1 );
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ function navigateUp() {
|
|
|
+
|
|
|
+ // Prioritize hiding fragments
|
|
|
+ if( ( isOverview() || previousFragment() === false ) && availableRoutes().up ) {
|
|
|
+ slide( indexh, indexv - 1 );
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ function navigateDown() {
|
|
|
+
|
|
|
+ // 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( 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 ) {
|
|
|
+ var v = ( previousSlide.querySelectorAll( 'section' ).length - 1 ) || undefined;
|
|
|
+ var h = indexh - 1;
|
|
|
+ slide( h, v );
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 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 -------------------------------//
|
|
|
+ // --------------------------------------------------------------------//
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Called by all event handlers that are based on user
|
|
|
+ * input.
|
|
|
+ */
|
|
|
+ function onUserInput( event ) {
|
|
|
+
|
|
|
+ if( config.autoSlideStoppable ) {
|
|
|
+ pauseAutoSlide();
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Handler for the document level 'keydown' event.
|
|
|
+ */
|
|
|
+ function onDocumentKeyDown( event ) {
|
|
|
+
|
|
|
+ onUserInput( 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.keyCode !== 32) || event.altKey || event.ctrlKey || event.metaKey ) return;
|
|
|
+
|
|
|
+ // While paused only allow "unpausing" keyboard events (b and .)
|
|
|
+ if( isPaused() && [66,190,191].indexOf( event.keyCode ) === -1 ) {
|
|
|
+ return false;
|
|
|
+ }
|
|
|
+
|
|
|
+ var triggered = false;
|
|
|
+
|
|
|
+ // 1. User defined key bindings
|
|
|
+ if( typeof config.keyboard === 'object' ) {
|
|
|
+
|
|
|
+ for( var key in config.keyboard ) {
|
|
|
+
|
|
|
+ // Check if this binding matches the pressed key
|
|
|
+ if( parseInt( key, 10 ) === event.keyCode ) {
|
|
|
+
|
|
|
+ var 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. System defined key bindings
|
|
|
+ if( triggered === false ) {
|
|
|
+
|
|
|
+ // Assume true and try to prove false
|
|
|
+ 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: isOverview() ? deactivateOverview() : event.shiftKey ? navigatePrev() : navigateNext(); break;
|
|
|
+ // return
|
|
|
+ case 13: isOverview() ? deactivateOverview() : triggered = false; break;
|
|
|
+ // b, period, Logitech presenter tools "black screen" button
|
|
|
+ case 66: case 190: case 191: 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();
|
|
|
+ }
|
|
|
+ // ESC or O key
|
|
|
+ else if ( ( event.keyCode === 27 || event.keyCode === 79 ) && features.transforms3d ) {
|
|
|
+ if( dom.preview ) {
|
|
|
+ closePreview();
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ toggleOverview();
|
|
|
+ }
|
|
|
+
|
|
|
+ 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.
|
|
|
+ */
|
|
|
+ function onTouchStart( 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 'touchmove' event.
|
|
|
+ */
|
|
|
+ function onTouchMove( event ) {
|
|
|
+
|
|
|
+ // Each touch should only trigger one action
|
|
|
+ if( !touch.captured ) {
|
|
|
+ onUserInput( event );
|
|
|
+
|
|
|
+ var currentX = event.touches[0].clientX;
|
|
|
+ var currentY = event.touches[0].clientY;
|
|
|
+
|
|
|
+ // If the touch started 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.captured = 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.captured = true;
|
|
|
+ navigateLeft();
|
|
|
+ }
|
|
|
+ else if( deltaX < -touch.threshold && Math.abs( deltaX ) > Math.abs( deltaY ) ) {
|
|
|
+ touch.captured = true;
|
|
|
+ navigateRight();
|
|
|
+ }
|
|
|
+ else if( deltaY > touch.threshold ) {
|
|
|
+ touch.captured = true;
|
|
|
+ navigateUp();
|
|
|
+ }
|
|
|
+ else if( deltaY < -touch.threshold ) {
|
|
|
+ touch.captured = true;
|
|
|
+ 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( navigator.userAgent.match( /android/gi ) ) {
|
|
|
+ event.preventDefault();
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Handler for the 'touchend' event.
|
|
|
+ */
|
|
|
+ function onTouchEnd( event ) {
|
|
|
+
|
|
|
+ touch.captured = false;
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Convert pointer down to touch start.
|
|
|
+ */
|
|
|
+ function onPointerDown( event ) {
|
|
|
+
|
|
|
+ if( event.pointerType === event.MSPOINTER_TYPE_TOUCH ) {
|
|
|
+ event.touches = [{ clientX: event.clientX, clientY: event.clientY }];
|
|
|
+ onTouchStart( event );
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Convert pointer move to touch move.
|
|
|
+ */
|
|
|
+ function onPointerMove( event ) {
|
|
|
+
|
|
|
+ if( event.pointerType === event.MSPOINTER_TYPE_TOUCH ) {
|
|
|
+ event.touches = [{ clientX: event.clientX, clientY: event.clientY }];
|
|
|
+ onTouchMove( event );
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Convert pointer up to touch end.
|
|
|
+ */
|
|
|
+ function onPointerUp( event ) {
|
|
|
+
|
|
|
+ if( event.pointerType === event.MSPOINTER_TYPE_TOUCH ) {
|
|
|
+ event.touches = [{ clientX: event.clientX, clientY: event.clientY }];
|
|
|
+ onTouchEnd( event );
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Handles mouse wheel scrolling, throttled to avoid skipping
|
|
|
+ * multiple slides.
|
|
|
+ */
|
|
|
+ function onDocumentMouseScroll( event ) {
|
|
|
+
|
|
|
+ if( Date.now() - lastMouseWheelStep > 600 ) {
|
|
|
+
|
|
|
+ lastMouseWheelStep = Date.now();
|
|
|
+
|
|
|
+ var delta = event.detail || -event.wheelDelta;
|
|
|
+ if( delta > 0 ) {
|
|
|
+ navigateNext();
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ navigatePrev();
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Clicking on the progress bar results in a navigation to the
|
|
|
+ * closest approximate horizontal slide using this equation:
|
|
|
+ *
|
|
|
+ * ( clickX / presentationWidth ) * numberOfSlides
|
|
|
+ */
|
|
|
+ function onProgressClicked( event ) {
|
|
|
+
|
|
|
+ onUserInput( event );
|
|
|
+
|
|
|
+ event.preventDefault();
|
|
|
+
|
|
|
+ var slidesTotal = toArray( document.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ).length;
|
|
|
+ var slideIndex = Math.floor( ( event.clientX / dom.wrapper.offsetWidth ) * slidesTotal );
|
|
|
+
|
|
|
+ slide( slideIndex );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Event handler for navigation control buttons.
|
|
|
+ */
|
|
|
+ function onNavigateLeftClicked( event ) { event.preventDefault(); onUserInput(); navigateLeft(); }
|
|
|
+ function onNavigateRightClicked( event ) { event.preventDefault(); onUserInput(); 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.
|
|
|
+ */
|
|
|
+ function onWindowHashChange( event ) {
|
|
|
+
|
|
|
+ readURL();
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Handler for the window level 'resize' event.
|
|
|
+ */
|
|
|
+ function onWindowResize( event ) {
|
|
|
+
|
|
|
+ layout();
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Handle for the window level 'visibilitychange' event.
|
|
|
+ */
|
|
|
+ function onPageVisibilityChange( event ) {
|
|
|
+
|
|
|
+ var isHidden = document.webkitHidden ||
|
|
|
+ document.msHidden ||
|
|
|
+ document.hidden;
|
|
|
+
|
|
|
+ // If, after clicking a link or similar and we're coming back,
|
|
|
+ // focus the document.body to ensure we can use keyboard shortcuts
|
|
|
+ if( isHidden === false && document.activeElement !== document.body ) {
|
|
|
+ document.activeElement.blur();
|
|
|
+ document.body.focus();
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 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( eventsAreBound && isOverview() ) {
|
|
|
+ event.preventDefault();
|
|
|
+
|
|
|
+ var 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 ) ) {
|
|
|
+ var 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.
|
|
|
+ */
|
|
|
+ function onPreviewLinkClicked( event ) {
|
|
|
+
|
|
|
+ var url = event.target.getAttribute( 'href' );
|
|
|
+ if( url ) {
|
|
|
+ openPreview( url );
|
|
|
+ event.preventDefault();
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Handles click on the auto-sliding controls element.
|
|
|
+ */
|
|
|
+ function onAutoSlidePlayerClick( event ) {
|
|
|
+
|
|
|
+ // Replay
|
|
|
+ if( Reveal.isLastSlide() && config.loop === false ) {
|
|
|
+ slide( 0, 0 );
|
|
|
+ resumeAutoSlide();
|
|
|
+ }
|
|
|
+ // Resume
|
|
|
+ else if( autoSlidePaused ) {
|
|
|
+ resumeAutoSlide();
|
|
|
+ }
|
|
|
+ // Pause
|
|
|
+ else {
|
|
|
+ pauseAutoSlide();
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+
|
|
|
+ // --------------------------------------------------------------------//
|
|
|
+ // ------------------------ PLAYBACK COMPONENT ------------------------//
|
|
|
+ // --------------------------------------------------------------------//
|
|
|
+
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Constructor for the playback component, which displays
|
|
|
+ * play/pause/progress controls.
|
|
|
+ *
|
|
|
+ * @param {HTMLElement} container The component will append
|
|
|
+ * itself to this
|
|
|
+ * @param {Function} progressCheck A method which will be
|
|
|
+ * called frequently to get the current progress on a range
|
|
|
+ * of 0-1
|
|
|
+ */
|
|
|
+ function Playback( container, progressCheck ) {
|
|
|
+
|
|
|
+ // Cosmetics
|
|
|
+ this.diameter = 50;
|
|
|
+ this.thickness = 3;
|
|
|
+
|
|
|
+ // Flags if we are currently playing
|
|
|
+ this.playing = false;
|
|
|
+
|
|
|
+ // Current progress on a 0-1 range
|
|
|
+ this.progress = 0;
|
|
|
+
|
|
|
+ // Used to loop the animation smoothly
|
|
|
+ this.progressOffset = 1;
|
|
|
+
|
|
|
+ this.container = container;
|
|
|
+ this.progressCheck = progressCheck;
|
|
|
+
|
|
|
+ this.canvas = document.createElement( 'canvas' );
|
|
|
+ this.canvas.className = 'playback';
|
|
|
+ this.canvas.width = this.diameter;
|
|
|
+ this.canvas.height = this.diameter;
|
|
|
+ this.context = this.canvas.getContext( '2d' );
|
|
|
+
|
|
|
+ this.container.appendChild( this.canvas );
|
|
|
+
|
|
|
+ this.render();
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ Playback.prototype.setPlaying = function( value ) {
|
|
|
+
|
|
|
+ var wasPlaying = this.playing;
|
|
|
+
|
|
|
+ this.playing = value;
|
|
|
+
|
|
|
+ // Start repainting if we weren't already
|
|
|
+ if( !wasPlaying && this.playing ) {
|
|
|
+ this.animate();
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ this.render();
|
|
|
+ }
|
|
|
+
|
|
|
+ };
|
|
|
+
|
|
|
+ Playback.prototype.animate = function() {
|
|
|
+
|
|
|
+ var progressBefore = this.progress;
|
|
|
+
|
|
|
+ this.progress = this.progressCheck();
|
|
|
+
|
|
|
+ // When we loop, offset the progress so that it eases
|
|
|
+ // smoothly rather than immediately resetting
|
|
|
+ if( progressBefore > 0.8 && this.progress < 0.2 ) {
|
|
|
+ this.progressOffset = this.progress;
|
|
|
+ }
|
|
|
+
|
|
|
+ this.render();
|
|
|
+
|
|
|
+ if( this.playing ) {
|
|
|
+ features.requestAnimationFrameMethod.call( window, this.animate.bind( this ) );
|
|
|
+ }
|
|
|
+
|
|
|
+ };
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Renders the current progress and playback state.
|
|
|
+ */
|
|
|
+ Playback.prototype.render = function() {
|
|
|
+
|
|
|
+ var progress = this.playing ? this.progress : 0,
|
|
|
+ radius = ( this.diameter / 2 ) - this.thickness,
|
|
|
+ x = this.diameter / 2,
|
|
|
+ y = this.diameter / 2,
|
|
|
+ iconSize = 14;
|
|
|
+
|
|
|
+ // Ease towards 1
|
|
|
+ this.progressOffset += ( 1 - this.progressOffset ) * 0.1;
|
|
|
+
|
|
|
+ var endAngle = ( - Math.PI / 2 ) + ( progress * ( Math.PI * 2 ) );
|
|
|
+ var startAngle = ( - Math.PI / 2 ) + ( this.progressOffset * ( Math.PI * 2 ) );
|
|
|
+
|
|
|
+ this.context.save();
|
|
|
+ this.context.clearRect( 0, 0, this.diameter, this.diameter );
|
|
|
+
|
|
|
+ // Solid background color
|
|
|
+ this.context.beginPath();
|
|
|
+ this.context.arc( x, y, radius + 2, 0, Math.PI * 2, false );
|
|
|
+ this.context.fillStyle = 'rgba( 0, 0, 0, 0.4 )';
|
|
|
+ this.context.fill();
|
|
|
+
|
|
|
+ // Draw progress track
|
|
|
+ this.context.beginPath();
|
|
|
+ this.context.arc( x, y, radius, 0, Math.PI * 2, false );
|
|
|
+ this.context.lineWidth = this.thickness;
|
|
|
+ this.context.strokeStyle = '#666';
|
|
|
+ this.context.stroke();
|
|
|
+
|
|
|
+ if( this.playing ) {
|
|
|
+ // Draw progress on top of track
|
|
|
+ this.context.beginPath();
|
|
|
+ this.context.arc( x, y, radius, startAngle, endAngle, false );
|
|
|
+ this.context.lineWidth = this.thickness;
|
|
|
+ this.context.strokeStyle = '#fff';
|
|
|
+ this.context.stroke();
|
|
|
+ }
|
|
|
+
|
|
|
+ this.context.translate( x - ( iconSize / 2 ), y - ( iconSize / 2 ) );
|
|
|
+
|
|
|
+ // Draw play/pause icons
|
|
|
+ if( this.playing ) {
|
|
|
+ this.context.fillStyle = '#fff';
|
|
|
+ this.context.fillRect( 0, 0, iconSize / 2 - 2, iconSize );
|
|
|
+ this.context.fillRect( iconSize / 2 + 2, 0, iconSize / 2 - 2, iconSize );
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ this.context.beginPath();
|
|
|
+ this.context.translate( 2, 0 );
|
|
|
+ this.context.moveTo( 0, 0 );
|
|
|
+ this.context.lineTo( iconSize - 2, iconSize / 2 );
|
|
|
+ this.context.lineTo( 0, iconSize );
|
|
|
+ this.context.fillStyle = '#fff';
|
|
|
+ this.context.fill();
|
|
|
+ }
|
|
|
+
|
|
|
+ this.context.restore();
|
|
|
+
|
|
|
+ };
|
|
|
+
|
|
|
+ Playback.prototype.on = function( type, listener ) {
|
|
|
+ this.canvas.addEventListener( type, listener, false );
|
|
|
+ };
|
|
|
+
|
|
|
+ Playback.prototype.off = function( type, listener ) {
|
|
|
+ this.canvas.removeEventListener( type, listener, false );
|
|
|
+ };
|
|
|
+
|
|
|
+ Playback.prototype.destroy = function() {
|
|
|
+
|
|
|
+ this.playing = false;
|
|
|
+
|
|
|
+ if( this.canvas.parentNode ) {
|
|
|
+ this.container.removeChild( this.canvas );
|
|
|
+ }
|
|
|
+
|
|
|
+ };
|
|
|
+
|
|
|
+
|
|
|
+ // --------------------------------------------------------------------//
|
|
|
+ // ------------------------------- API --------------------------------//
|
|
|
+ // --------------------------------------------------------------------//
|
|
|
+
|
|
|
+
|
|
|
+ return {
|
|
|
+ initialize: initialize,
|
|
|
+ configure: configure,
|
|
|
+ sync: sync,
|
|
|
+
|
|
|
+ // Navigation methods
|
|
|
+ slide: slide,
|
|
|
+ left: navigateLeft,
|
|
|
+ right: navigateRight,
|
|
|
+ up: navigateUp,
|
|
|
+ down: navigateDown,
|
|
|
+ prev: navigatePrev,
|
|
|
+ next: navigateNext,
|
|
|
+
|
|
|
+ // Fragment methods
|
|
|
+ navigateFragment: navigateFragment,
|
|
|
+ prevFragment: previousFragment,
|
|
|
+ nextFragment: nextFragment,
|
|
|
+
|
|
|
+ // Deprecated aliases
|
|
|
+ navigateTo: slide,
|
|
|
+ navigateLeft: navigateLeft,
|
|
|
+ navigateRight: navigateRight,
|
|
|
+ navigateUp: navigateUp,
|
|
|
+ navigateDown: navigateDown,
|
|
|
+ navigatePrev: navigatePrev,
|
|
|
+ navigateNext: navigateNext,
|
|
|
+
|
|
|
+ // Forces an update in slide layout
|
|
|
+ layout: layout,
|
|
|
+
|
|
|
+ // Returns an object with the available routes as booleans (left/right/top/bottom)
|
|
|
+ availableRoutes: availableRoutes,
|
|
|
+
|
|
|
+ // Returns an object with the available fragments as booleans (prev/next)
|
|
|
+ availableFragments: availableFragments,
|
|
|
+
|
|
|
+ // Toggles the overview mode on/off
|
|
|
+ toggleOverview: toggleOverview,
|
|
|
+
|
|
|
+ // Toggles the "black screen" mode on/off
|
|
|
+ togglePause: togglePause,
|
|
|
+
|
|
|
+ // State checks
|
|
|
+ isOverview: isOverview,
|
|
|
+ isPaused: isPaused,
|
|
|
+
|
|
|
+ // 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 slide at the specified index, y is optional
|
|
|
+ getSlide: function( x, y ) {
|
|
|
+ var horizontalSlide = document.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR )[ x ];
|
|
|
+ var verticalSlides = horizontalSlide && horizontalSlide.querySelectorAll( 'section' );
|
|
|
+
|
|
|
+ if( typeof y !== 'undefined' ) {
|
|
|
+ return verticalSlides ? verticalSlides[ y ] : undefined;
|
|
|
+ }
|
|
|
+
|
|
|
+ return horizontalSlide;
|
|
|
+ },
|
|
|
+
|
|
|
+ // Returns the previous slide element, may be null
|
|
|
+ getPreviousSlide: function() {
|
|
|
+ return previousSlide;
|
|
|
+ },
|
|
|
+
|
|
|
+ // Returns the current slide element
|
|
|
+ getCurrentSlide: function() {
|
|
|
+ return currentSlide;
|
|
|
+ },
|
|
|
+
|
|
|
+ // Returns the current scale of the presentation content
|
|
|
+ getScale: function() {
|
|
|
+ return scale;
|
|
|
+ },
|
|
|
+
|
|
|
+ // Returns the current configuration object
|
|
|
+ getConfig: function() {
|
|
|
+ return config;
|
|
|
+ },
|
|
|
+
|
|
|
+ // 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();
|
|
|
+ } );
|
|
|
+
|
|
|
+ // Basic deserialization
|
|
|
+ for( var i in query ) {
|
|
|
+ var value = query[ i ];
|
|
|
+
|
|
|
+ query[ i ] = unescape( value );
|
|
|
+
|
|
|
+ if( value === 'null' ) query[ i ] = null;
|
|
|
+ else if( value === 'true' ) query[ i ] = true;
|
|
|
+ else if( value === 'false' ) query[ i ] = false;
|
|
|
+ else if( value.match( /^\d+$/ ) ) query[ i ] = parseFloat( value );
|
|
|
+ }
|
|
|
+
|
|
|
+ return query;
|
|
|
+ },
|
|
|
+
|
|
|
+ // Returns true if we're currently on the first slide
|
|
|
+ isFirstSlide: function() {
|
|
|
+ return document.querySelector( SLIDES_SELECTOR + '.past' ) == null ? true : false;
|
|
|
+ },
|
|
|
+
|
|
|
+ // Returns true if we're currently on the last slide
|
|
|
+ isLastSlide: function() {
|
|
|
+ if( currentSlide ) {
|
|
|
+ // Does this slide has next a 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;
|
|
|
+ },
|
|
|
+
|
|
|
+ // Checks if reveal.js has been loaded and is ready for use
|
|
|
+ isReady: function() {
|
|
|
+ return loaded;
|
|
|
+ },
|
|
|
+
|
|
|
+ // 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 );
|
|
|
+ }
|
|
|
+ }
|
|
|
+ };
|
|
|
+
|
|
|
+})();
|