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-/*!
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- * reveal.js
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- * http://revealjs.com
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- * MIT licensed
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- *
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- * Copyright (C) 2017 Hakim El Hattab, http://hakim.se
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- */
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-(function( root, factory ) {
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- if( typeof define === 'function' && define.amd ) {
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- // AMD. Register as an anonymous module.
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- define( function() {
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- root.Reveal = factory();
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- return root.Reveal;
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- } );
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- } else if( typeof exports === 'object' ) {
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- // Node. Does not work with strict CommonJS.
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- module.exports = factory();
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- } else {
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- // Browser globals.
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- root.Reveal = factory();
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- }
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-}( this, function() {
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-
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- 'use strict';
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-
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- var Reveal;
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-
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- // The reveal.js version
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- var VERSION = '3.6.0';
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-
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- var SLIDES_SELECTOR = '.slides section',
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- HORIZONTAL_SLIDES_SELECTOR = '.slides>section',
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- VERTICAL_SLIDES_SELECTOR = '.slides>section.present>section',
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- HOME_SLIDE_SELECTOR = '.slides>section:first-of-type',
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- UA = navigator.userAgent,
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-
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- // Configuration 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: 0.04,
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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: 2.0,
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-
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- // Display presentation control arrows
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- controls: true,
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-
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- // Help the user learn the controls by providing hints, for example by
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- // bouncing the down arrow when they first encounter a vertical slide
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- controlsTutorial: true,
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-
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- // Determines where controls appear, "edges" or "bottom-right"
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- controlsLayout: 'bottom-right',
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-
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- // Visibility rule for backwards navigation arrows; "faded", "hidden"
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- // or "visible"
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- controlsBackArrows: 'faded',
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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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- // Determine which displays to show the slide number on
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- showSlideNumber: 'all',
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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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- // Optional function that blocks keyboard events when retuning false
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- keyboardCondition: null,
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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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- // Randomizes the order of slides each time the presentation loads
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- shuffle: 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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- // Flags if we should show a help overlay when the question-mark
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- // key is pressed
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- help: true,
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-
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- // Flags if it should be possible to pause the presentation (blackout)
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- pause: true,
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-
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- // Flags if speaker notes should be visible to all viewers
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- showNotes: false,
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-
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- // Global override for autolaying embedded media (video/audio/iframe)
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- // - null: Media will only autoplay if data-autoplay is present
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- // - true: All media will autoplay, regardless of individual setting
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- // - false: No media will autoplay, regardless of individual setting
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- autoPlayMedia: null,
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-
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- // Controls automatic progression to the next slide
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- // - 0: Auto-sliding only happens if the data-autoslide HTML attribute
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- // is present on the current slide or fragment
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- // - 1+: All slides will progress automatically at the given interval
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- // - false: No auto-sliding, even if data-autoslide is present
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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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- // Use this method for navigation when auto-sliding (defaults to navigateNext)
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- autoSlideMethod: null,
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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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- // Add `data-preview-link` and `data-preview-link="false"` to customise each link
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- // individually
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- previewLinks: false,
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-
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- // Exposes the reveal.js API through window.postMessage
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- postMessage: true,
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-
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- // Dispatches all reveal.js events to the parent window through postMessage
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- postMessageEvents: false,
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-
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- // Focuses body when page changes visibility to ensure keyboard shortcuts work
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- focusBodyOnPageVisibilityChange: true,
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-
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- // Transition style
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- transition: 'slide', // none/fade/slide/convex/concave/zoom
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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: 'fade', // none/fade/slide/convex/concave/zoom
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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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- // Amount of pixels to move the parallax background per slide step
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- parallaxBackgroundHorizontal: null,
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- parallaxBackgroundVertical: null,
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-
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- // The maximum number of pages a single slide can expand onto when printing
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- // to PDF, unlimited by default
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- pdfMaxPagesPerSlide: Number.POSITIVE_INFINITY,
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-
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- // Offset used to reduce the height of content within exported PDF pages.
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- // This exists to account for environment differences based on how you
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- // print to PDF. CLI printing options, like phantomjs and wkpdf, can end
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- // on precisely the total height of the document whereas in-browser
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- // printing has to end one pixel before.
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- pdfPageHeightOffset: -1,
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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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- // The display mode that will be used to show slides
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- display: 'block',
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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.initialize() has been called
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- initialized = false,
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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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- // Flags if the overview mode is currently active
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- overview = false,
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-
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- // Holds the dimensions of our overview slides, including margins
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- overviewSlideWidth = null,
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- overviewSlideHeight = null,
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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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- // Remember which directions that the user has navigated towards
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- hasNavigatedRight = false,
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- hasNavigatedDown = false,
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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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- // CSS transform that is currently applied to the slides container,
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- // split into two groups
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- slidesTransform = { layout: '', overview: '' },
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-
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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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- // Client is a desktop Chrome, see #checkCapabilities()
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- isChrome,
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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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- // 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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- // Holds information about the keyboard shortcuts
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- keyboardShortcuts = {
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- 'N , SPACE': 'Next slide',
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- 'P': 'Previous slide',
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- '← , H': 'Navigate left',
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- '→ , L': 'Navigate right',
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- '↑ , K': 'Navigate up',
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- '↓ , J': 'Navigate down',
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- 'Home': 'First slide',
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- 'End': 'Last slide',
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- 'B , .': 'Pause',
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- 'F': 'Fullscreen',
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- 'ESC, O': 'Slide overview'
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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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- // Make sure we only initialize once
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- if( initialized === true ) return;
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-
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- initialized = true;
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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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- // Since JS won't be running any further, we load all lazy
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- // loading elements upfront
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- var images = toArray( document.getElementsByTagName( 'img' ) ),
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- iframes = toArray( document.getElementsByTagName( 'iframe' ) );
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-
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- var lazyLoadable = images.concat( iframes );
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-
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- for( var i = 0, len = lazyLoadable.length; i < len; i++ ) {
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- var element = lazyLoadable[i];
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- if( element.getAttribute( 'data-src' ) ) {
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- element.setAttribute( 'src', element.getAttribute( 'data-src' ) );
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- element.removeAttribute( 'data-src' );
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- }
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- }
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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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- // Cache references to key DOM elements
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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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- // 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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- isMobileDevice = /(iphone|ipod|ipad|android)/gi.test( UA );
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- isChrome = /chrome/i.test( UA ) && !/edge/i.test( UA );
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-
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- var testElement = document.createElement( 'div' );
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-
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- features.transforms3d = 'WebkitPerspective' in testElement.style ||
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- 'MozPerspective' in testElement.style ||
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- 'msPerspective' in testElement.style ||
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- 'OPerspective' in testElement.style ||
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- 'perspective' in testElement.style;
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-
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- features.transforms2d = 'WebkitTransform' in testElement.style ||
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- 'MozTransform' in testElement.style ||
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- 'msTransform' in testElement.style ||
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- 'OTransform' in testElement.style ||
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- 'transform' in testElement.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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- // Transitions in the overview are disabled in desktop and
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- // Safari due to lag
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- features.overviewTransitions = !/Version\/[\d\.]+.*Safari/.test( UA );
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-
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- // Flags if we should use zoom instead of transform to scale
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- // up slides. Zoom produces crisper results but has a lot of
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- // xbrowser quirks so we only use it in whitelsited browsers.
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- features.zoom = 'zoom' in testElement.style && !isMobileDevice &&
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- ( isChrome || /Version\/[\d\.]+.*Safari/.test( UA ) );
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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() ) {
|
|
|
- if( s.async ) {
|
|
|
- scriptsAsync.push( s.src );
|
|
|
- }
|
|
|
- else {
|
|
|
- scripts.push( s.src );
|
|
|
- }
|
|
|
-
|
|
|
- loadScript( s );
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- if( scripts.length ) {
|
|
|
- scriptsToPreload = scripts.length;
|
|
|
-
|
|
|
- // Load synchronous scripts
|
|
|
- head.js.apply( null, scripts );
|
|
|
- }
|
|
|
- else {
|
|
|
- proceed();
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Starts up reveal.js by binding input events and navigating
|
|
|
- * to the current URL deeplink if there is one.
|
|
|
- */
|
|
|
- function start() {
|
|
|
-
|
|
|
- loaded = true;
|
|
|
-
|
|
|
- // Make sure we've got all the DOM elements we need
|
|
|
- setupDOM();
|
|
|
-
|
|
|
- // Listen to messages posted to this window
|
|
|
- setupPostMessage();
|
|
|
-
|
|
|
- // Prevent the slides from being scrolled out of view
|
|
|
- setupScrollPrevention();
|
|
|
-
|
|
|
- // Resets all vertical slides so that only the first is visible
|
|
|
- resetVerticalSlides();
|
|
|
-
|
|
|
- // Updates the presentation to match the current configuration values
|
|
|
- configure();
|
|
|
-
|
|
|
- // Read the initial hash
|
|
|
- readURL();
|
|
|
-
|
|
|
- // Update all backgrounds
|
|
|
- updateBackground( true );
|
|
|
-
|
|
|
- // Notify listeners that the presentation is ready but use a 1ms
|
|
|
- // timeout to ensure it's not fired synchronously after #initialize()
|
|
|
- setTimeout( function() {
|
|
|
- // Enable transitions now that we're loaded
|
|
|
- dom.slides.classList.remove( 'no-transition' );
|
|
|
-
|
|
|
- dom.wrapper.classList.add( 'ready' );
|
|
|
-
|
|
|
- dispatchEvent( 'ready', {
|
|
|
- 'indexh': indexh,
|
|
|
- 'indexv': indexv,
|
|
|
- 'currentSlide': currentSlide
|
|
|
- } );
|
|
|
- }, 1 );
|
|
|
-
|
|
|
- // Special setup and config is required when printing to PDF
|
|
|
- if( isPrintingPDF() ) {
|
|
|
- removeEventListeners();
|
|
|
-
|
|
|
- // The document needs to have loaded for the PDF layout
|
|
|
- // measurements to be accurate
|
|
|
- if( document.readyState === 'complete' ) {
|
|
|
- setupPDF();
|
|
|
- }
|
|
|
- else {
|
|
|
- window.addEventListener( 'load', setupPDF );
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Finds and stores references to DOM elements which are
|
|
|
- * required by the presentation. If a required element is
|
|
|
- * not found, it is created.
|
|
|
- */
|
|
|
- function setupDOM() {
|
|
|
-
|
|
|
- // Prevent transitions while we're loading
|
|
|
- dom.slides.classList.add( 'no-transition' );
|
|
|
-
|
|
|
- if( isMobileDevice ) {
|
|
|
- dom.wrapper.classList.add( 'no-hover' );
|
|
|
- }
|
|
|
- else {
|
|
|
- dom.wrapper.classList.remove( 'no-hover' );
|
|
|
- }
|
|
|
-
|
|
|
- if( /iphone/gi.test( UA ) ) {
|
|
|
- dom.wrapper.classList.add( 'ua-iphone' );
|
|
|
- }
|
|
|
- else {
|
|
|
- dom.wrapper.classList.remove( 'ua-iphone' );
|
|
|
- }
|
|
|
-
|
|
|
- // Background element
|
|
|
- dom.background = createSingletonNode( dom.wrapper, 'div', 'backgrounds', null );
|
|
|
-
|
|
|
- // Progress bar
|
|
|
- dom.progress = createSingletonNode( dom.wrapper, 'div', 'progress', '<span></span>' );
|
|
|
- dom.progressbar = dom.progress.querySelector( 'span' );
|
|
|
-
|
|
|
- // Arrow controls
|
|
|
- dom.controls = createSingletonNode( dom.wrapper, 'aside', 'controls',
|
|
|
- '<button class="navigate-left" aria-label="previous slide"><div class="controls-arrow"></div></button>' +
|
|
|
- '<button class="navigate-right" aria-label="next slide"><div class="controls-arrow"></div></button>' +
|
|
|
- '<button class="navigate-up" aria-label="above slide"><div class="controls-arrow"></div></button>' +
|
|
|
- '<button class="navigate-down" aria-label="below slide"><div class="controls-arrow"></div></button>' );
|
|
|
-
|
|
|
- // Slide number
|
|
|
- dom.slideNumber = createSingletonNode( dom.wrapper, 'div', 'slide-number', '' );
|
|
|
-
|
|
|
- // Element containing notes that are visible to the audience
|
|
|
- dom.speakerNotes = createSingletonNode( dom.wrapper, 'div', 'speaker-notes', null );
|
|
|
- dom.speakerNotes.setAttribute( 'data-prevent-swipe', '' );
|
|
|
- dom.speakerNotes.setAttribute( 'tabindex', '0' );
|
|
|
-
|
|
|
- // Overlay graphic which is displayed during the paused mode
|
|
|
- createSingletonNode( dom.wrapper, 'div', 'pause-overlay', null );
|
|
|
-
|
|
|
- dom.wrapper.setAttribute( 'role', 'application' );
|
|
|
-
|
|
|
- // There can be multiple instances of controls throughout the page
|
|
|
- dom.controlsLeft = toArray( document.querySelectorAll( '.navigate-left' ) );
|
|
|
- dom.controlsRight = toArray( document.querySelectorAll( '.navigate-right' ) );
|
|
|
- dom.controlsUp = toArray( document.querySelectorAll( '.navigate-up' ) );
|
|
|
- dom.controlsDown = toArray( document.querySelectorAll( '.navigate-down' ) );
|
|
|
- dom.controlsPrev = toArray( document.querySelectorAll( '.navigate-prev' ) );
|
|
|
- dom.controlsNext = toArray( document.querySelectorAll( '.navigate-next' ) );
|
|
|
-
|
|
|
- // The right and down arrows in the standard reveal.js controls
|
|
|
- dom.controlsRightArrow = dom.controls.querySelector( '.navigate-right' );
|
|
|
- dom.controlsDownArrow = dom.controls.querySelector( '.navigate-down' );
|
|
|
-
|
|
|
- dom.statusDiv = createStatusDiv();
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Creates a hidden div with role aria-live to announce the
|
|
|
- * current slide content. Hide the div off-screen to make it
|
|
|
- * available only to Assistive Technologies.
|
|
|
- *
|
|
|
- * @return {HTMLElement}
|
|
|
- */
|
|
|
- function createStatusDiv() {
|
|
|
-
|
|
|
- var statusDiv = document.getElementById( 'aria-status-div' );
|
|
|
- if( !statusDiv ) {
|
|
|
- statusDiv = document.createElement( 'div' );
|
|
|
- statusDiv.style.position = 'absolute';
|
|
|
- statusDiv.style.height = '1px';
|
|
|
- statusDiv.style.width = '1px';
|
|
|
- statusDiv.style.overflow = 'hidden';
|
|
|
- statusDiv.style.clip = 'rect( 1px, 1px, 1px, 1px )';
|
|
|
- statusDiv.setAttribute( 'id', 'aria-status-div' );
|
|
|
- statusDiv.setAttribute( 'aria-live', 'polite' );
|
|
|
- statusDiv.setAttribute( 'aria-atomic','true' );
|
|
|
- dom.wrapper.appendChild( statusDiv );
|
|
|
- }
|
|
|
- return statusDiv;
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Converts the given HTML element into a string of text
|
|
|
- * that can be announced to a screen reader. Hidden
|
|
|
- * elements are excluded.
|
|
|
- */
|
|
|
- function getStatusText( node ) {
|
|
|
-
|
|
|
- var text = '';
|
|
|
-
|
|
|
- // Text node
|
|
|
- if( node.nodeType === 3 ) {
|
|
|
- text += node.textContent;
|
|
|
- }
|
|
|
- // Element node
|
|
|
- else if( node.nodeType === 1 ) {
|
|
|
-
|
|
|
- var isAriaHidden = node.getAttribute( 'aria-hidden' );
|
|
|
- var isDisplayHidden = window.getComputedStyle( node )['display'] === 'none';
|
|
|
- if( isAriaHidden !== 'true' && !isDisplayHidden ) {
|
|
|
-
|
|
|
- toArray( node.childNodes ).forEach( function( child ) {
|
|
|
- text += getStatusText( child );
|
|
|
- } );
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- return text;
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Configures the presentation for printing to a static
|
|
|
- * PDF.
|
|
|
- */
|
|
|
- function setupPDF() {
|
|
|
-
|
|
|
- var slideSize = getComputedSlideSize( window.innerWidth, window.innerHeight );
|
|
|
-
|
|
|
- // Dimensions of the PDF pages
|
|
|
- var pageWidth = Math.floor( slideSize.width * ( 1 + config.margin ) ),
|
|
|
- pageHeight = Math.floor( slideSize.height * ( 1 + config.margin ) );
|
|
|
-
|
|
|
- // Dimensions of slides within the pages
|
|
|
- var slideWidth = slideSize.width,
|
|
|
- slideHeight = slideSize.height;
|
|
|
-
|
|
|
- // Let the browser know what page size we want to print
|
|
|
- injectStyleSheet( '@page{size:'+ pageWidth +'px '+ pageHeight +'px; margin: 0px;}' );
|
|
|
-
|
|
|
- // Limit the size of certain elements to the dimensions of the slide
|
|
|
- injectStyleSheet( '.reveal section>img, .reveal section>video, .reveal section>iframe{max-width: '+ slideWidth +'px; max-height:'+ slideHeight +'px}' );
|
|
|
-
|
|
|
- document.body.classList.add( 'print-pdf' );
|
|
|
- document.body.style.width = pageWidth + 'px';
|
|
|
- document.body.style.height = pageHeight + 'px';
|
|
|
-
|
|
|
- // Make sure stretch elements fit on slide
|
|
|
- layoutSlideContents( slideWidth, slideHeight );
|
|
|
-
|
|
|
- // Add each slide's index as attributes on itself, we need these
|
|
|
- // indices to generate slide numbers below
|
|
|
- toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ).forEach( function( hslide, h ) {
|
|
|
- hslide.setAttribute( 'data-index-h', h );
|
|
|
-
|
|
|
- if( hslide.classList.contains( 'stack' ) ) {
|
|
|
- toArray( hslide.querySelectorAll( 'section' ) ).forEach( function( vslide, v ) {
|
|
|
- vslide.setAttribute( 'data-index-h', h );
|
|
|
- vslide.setAttribute( 'data-index-v', v );
|
|
|
- } );
|
|
|
- }
|
|
|
- } );
|
|
|
-
|
|
|
- // Slide and slide background layout
|
|
|
- toArray( dom.wrapper.querySelectorAll( SLIDES_SELECTOR ) ).forEach( function( slide ) {
|
|
|
-
|
|
|
- // Vertical stacks are not centred since their section
|
|
|
- // children will be
|
|
|
- if( slide.classList.contains( 'stack' ) === false ) {
|
|
|
- // Center the slide inside of the page, giving the slide some margin
|
|
|
- var left = ( pageWidth - slideWidth ) / 2,
|
|
|
- top = ( pageHeight - slideHeight ) / 2;
|
|
|
-
|
|
|
- var contentHeight = slide.scrollHeight;
|
|
|
- var numberOfPages = Math.max( Math.ceil( contentHeight / pageHeight ), 1 );
|
|
|
-
|
|
|
- // Adhere to configured pages per slide limit
|
|
|
- numberOfPages = Math.min( numberOfPages, config.pdfMaxPagesPerSlide );
|
|
|
-
|
|
|
- // Center slides vertically
|
|
|
- if( numberOfPages === 1 && config.center || slide.classList.contains( 'center' ) ) {
|
|
|
- top = Math.max( ( pageHeight - contentHeight ) / 2, 0 );
|
|
|
- }
|
|
|
-
|
|
|
- // Wrap the slide in a page element and hide its overflow
|
|
|
- // so that no page ever flows onto another
|
|
|
- var page = document.createElement( 'div' );
|
|
|
- page.className = 'pdf-page';
|
|
|
- page.style.height = ( ( pageHeight + config.pdfPageHeightOffset ) * numberOfPages ) + 'px';
|
|
|
- slide.parentNode.insertBefore( page, slide );
|
|
|
- page.appendChild( slide );
|
|
|
-
|
|
|
- // Position the slide inside of the page
|
|
|
- slide.style.left = left + 'px';
|
|
|
- slide.style.top = top + 'px';
|
|
|
- slide.style.width = slideWidth + 'px';
|
|
|
-
|
|
|
- if( slide.slideBackgroundElement ) {
|
|
|
- page.insertBefore( slide.slideBackgroundElement, slide );
|
|
|
- }
|
|
|
-
|
|
|
- // Inject notes if `showNotes` is enabled
|
|
|
- if( config.showNotes ) {
|
|
|
-
|
|
|
- // Are there notes for this slide?
|
|
|
- var notes = getSlideNotes( slide );
|
|
|
- if( notes ) {
|
|
|
-
|
|
|
- var notesSpacing = 8;
|
|
|
- var notesLayout = typeof config.showNotes === 'string' ? config.showNotes : 'inline';
|
|
|
- var notesElement = document.createElement( 'div' );
|
|
|
- notesElement.classList.add( 'speaker-notes' );
|
|
|
- notesElement.classList.add( 'speaker-notes-pdf' );
|
|
|
- notesElement.setAttribute( 'data-layout', notesLayout );
|
|
|
- notesElement.innerHTML = notes;
|
|
|
-
|
|
|
- if( notesLayout === 'separate-page' ) {
|
|
|
- page.parentNode.insertBefore( notesElement, page.nextSibling );
|
|
|
- }
|
|
|
- else {
|
|
|
- notesElement.style.left = notesSpacing + 'px';
|
|
|
- notesElement.style.bottom = notesSpacing + 'px';
|
|
|
- notesElement.style.width = ( pageWidth - notesSpacing*2 ) + 'px';
|
|
|
- page.appendChild( notesElement );
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- // Inject slide numbers if `slideNumbers` are enabled
|
|
|
- if( config.slideNumber && /all|print/i.test( config.showSlideNumber ) ) {
|
|
|
- var slideNumberH = parseInt( slide.getAttribute( 'data-index-h' ), 10 ) + 1,
|
|
|
- slideNumberV = parseInt( slide.getAttribute( 'data-index-v' ), 10 ) + 1;
|
|
|
-
|
|
|
- var numberElement = document.createElement( 'div' );
|
|
|
- numberElement.classList.add( 'slide-number' );
|
|
|
- numberElement.classList.add( 'slide-number-pdf' );
|
|
|
- numberElement.innerHTML = formatSlideNumber( slideNumberH, '.', slideNumberV );
|
|
|
- page.appendChild( numberElement );
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- } );
|
|
|
-
|
|
|
- // Show all fragments
|
|
|
- toArray( dom.wrapper.querySelectorAll( SLIDES_SELECTOR + ' .fragment' ) ).forEach( function( fragment ) {
|
|
|
- fragment.classList.add( 'visible' );
|
|
|
- } );
|
|
|
-
|
|
|
- // Notify subscribers that the PDF layout is good to go
|
|
|
- dispatchEvent( 'pdf-ready' );
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * This is an unfortunate necessity. Some actions – such as
|
|
|
- * an input field being focused in an iframe or using the
|
|
|
- * keyboard to expand text selection beyond the bounds of
|
|
|
- * a slide – can trigger our content to be pushed out of view.
|
|
|
- * This scrolling can not be prevented by hiding overflow in
|
|
|
- * CSS (we already do) so we have to resort to repeatedly
|
|
|
- * checking if the slides have been offset :(
|
|
|
- */
|
|
|
- function setupScrollPrevention() {
|
|
|
-
|
|
|
- setInterval( function() {
|
|
|
- if( dom.wrapper.scrollTop !== 0 || dom.wrapper.scrollLeft !== 0 ) {
|
|
|
- dom.wrapper.scrollTop = 0;
|
|
|
- dom.wrapper.scrollLeft = 0;
|
|
|
- }
|
|
|
- }, 1000 );
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Creates an HTML element and returns a reference to it.
|
|
|
- * If the element already exists the existing instance will
|
|
|
- * be returned.
|
|
|
- *
|
|
|
- * @param {HTMLElement} container
|
|
|
- * @param {string} tagname
|
|
|
- * @param {string} classname
|
|
|
- * @param {string} innerHTML
|
|
|
- *
|
|
|
- * @return {HTMLElement}
|
|
|
- */
|
|
|
- function createSingletonNode( container, tagname, classname, innerHTML ) {
|
|
|
-
|
|
|
- // Find all nodes matching the description
|
|
|
- var nodes = container.querySelectorAll( '.' + classname );
|
|
|
-
|
|
|
- // Check all matches to find one which is a direct child of
|
|
|
- // the specified container
|
|
|
- for( var i = 0; i < nodes.length; i++ ) {
|
|
|
- var testNode = nodes[i];
|
|
|
- if( testNode.parentNode === container ) {
|
|
|
- return testNode;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- // If no node was found, create it now
|
|
|
- var node = document.createElement( tagname );
|
|
|
- node.className = classname;
|
|
|
- if( typeof innerHTML === 'string' ) {
|
|
|
- node.innerHTML = innerHTML;
|
|
|
- }
|
|
|
- container.appendChild( node );
|
|
|
-
|
|
|
- return node;
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Creates the slide background elements and appends them
|
|
|
- * to the background container. One element is created per
|
|
|
- * slide no matter if the given slide has visible background.
|
|
|
- */
|
|
|
- function createBackgrounds() {
|
|
|
-
|
|
|
- var printMode = isPrintingPDF();
|
|
|
-
|
|
|
- // Clear prior backgrounds
|
|
|
- dom.background.innerHTML = '';
|
|
|
- dom.background.classList.add( 'no-transition' );
|
|
|
-
|
|
|
- // Iterate over all horizontal slides
|
|
|
- toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ).forEach( function( slideh ) {
|
|
|
-
|
|
|
- var backgroundStack = createBackground( slideh, dom.background );
|
|
|
-
|
|
|
- // Iterate over all vertical slides
|
|
|
- toArray( slideh.querySelectorAll( 'section' ) ).forEach( function( slidev ) {
|
|
|
-
|
|
|
- createBackground( slidev, backgroundStack );
|
|
|
-
|
|
|
- backgroundStack.classList.add( 'stack' );
|
|
|
-
|
|
|
- } );
|
|
|
-
|
|
|
- } );
|
|
|
-
|
|
|
- // Add parallax background if specified
|
|
|
- if( config.parallaxBackgroundImage ) {
|
|
|
-
|
|
|
- dom.background.style.backgroundImage = 'url("' + config.parallaxBackgroundImage + '")';
|
|
|
- dom.background.style.backgroundSize = config.parallaxBackgroundSize;
|
|
|
-
|
|
|
- // 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' );
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Creates a background for the given slide.
|
|
|
- *
|
|
|
- * @param {HTMLElement} slide
|
|
|
- * @param {HTMLElement} container The element that the background
|
|
|
- * should be appended to
|
|
|
- * @return {HTMLElement} New background div
|
|
|
- */
|
|
|
- function createBackground( slide, container ) {
|
|
|
-
|
|
|
- var data = {
|
|
|
- background: slide.getAttribute( 'data-background' ),
|
|
|
- backgroundSize: slide.getAttribute( 'data-background-size' ),
|
|
|
- backgroundImage: slide.getAttribute( 'data-background-image' ),
|
|
|
- backgroundVideo: slide.getAttribute( 'data-background-video' ),
|
|
|
- backgroundIframe: slide.getAttribute( 'data-background-iframe' ),
|
|
|
- backgroundColor: slide.getAttribute( 'data-background-color' ),
|
|
|
- backgroundRepeat: slide.getAttribute( 'data-background-repeat' ),
|
|
|
- backgroundPosition: slide.getAttribute( 'data-background-position' ),
|
|
|
- backgroundTransition: slide.getAttribute( 'data-background-transition' )
|
|
|
- };
|
|
|
-
|
|
|
- var element = document.createElement( 'div' );
|
|
|
-
|
|
|
- // Carry over custom classes from the slide to the background
|
|
|
- element.className = 'slide-background ' + slide.className.replace( /present|past|future/, '' );
|
|
|
-
|
|
|
- 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 ) ) {
|
|
|
- slide.setAttribute( 'data-background-image', data.background );
|
|
|
- }
|
|
|
- else {
|
|
|
- element.style.background = data.background;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- // Create a hash for this combination of background settings.
|
|
|
- // This is used to determine when two slide backgrounds are
|
|
|
- // the same.
|
|
|
- if( data.background || data.backgroundColor || data.backgroundImage || data.backgroundVideo || data.backgroundIframe ) {
|
|
|
- element.setAttribute( 'data-background-hash', data.background +
|
|
|
- data.backgroundSize +
|
|
|
- data.backgroundImage +
|
|
|
- data.backgroundVideo +
|
|
|
- data.backgroundIframe +
|
|
|
- data.backgroundColor +
|
|
|
- data.backgroundRepeat +
|
|
|
- data.backgroundPosition +
|
|
|
- data.backgroundTransition );
|
|
|
- }
|
|
|
-
|
|
|
- // Additional and optional background properties
|
|
|
- if( data.backgroundSize ) element.style.backgroundSize = data.backgroundSize;
|
|
|
- if( data.backgroundSize ) element.setAttribute( 'data-background-size', data.backgroundSize );
|
|
|
- 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 );
|
|
|
-
|
|
|
- // If backgrounds are being recreated, clear old classes
|
|
|
- slide.classList.remove( 'has-dark-background' );
|
|
|
- slide.classList.remove( 'has-light-background' );
|
|
|
-
|
|
|
- slide.slideBackgroundElement = element;
|
|
|
-
|
|
|
- // If this slide has a background color, add a class that
|
|
|
- // signals if it is light or dark. If the slide has no background
|
|
|
- // color, no class will be set
|
|
|
- var computedBackgroundStyle = window.getComputedStyle( element );
|
|
|
- if( computedBackgroundStyle && computedBackgroundStyle.backgroundColor ) {
|
|
|
- var rgb = colorToRgb( computedBackgroundStyle.backgroundColor );
|
|
|
-
|
|
|
- // Ignore fully transparent backgrounds. Some browsers return
|
|
|
- // rgba(0,0,0,0) when reading the computed background color of
|
|
|
- // an element with no background
|
|
|
- if( rgb && rgb.a !== 0 ) {
|
|
|
- if( colorBrightness( computedBackgroundStyle.backgroundColor ) < 128 ) {
|
|
|
- slide.classList.add( 'has-dark-background' );
|
|
|
- }
|
|
|
- else {
|
|
|
- slide.classList.add( 'has-light-background' );
|
|
|
- }
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- return element;
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Registers a listener to postMessage events, this makes it
|
|
|
- * possible to call all reveal.js API methods from another
|
|
|
- * window. For example:
|
|
|
- *
|
|
|
- * revealWindow.postMessage( JSON.stringify({
|
|
|
- * method: 'slide',
|
|
|
- * args: [ 2 ]
|
|
|
- * }), '*' );
|
|
|
- */
|
|
|
- function setupPostMessage() {
|
|
|
-
|
|
|
- if( config.postMessage ) {
|
|
|
- window.addEventListener( 'message', function ( event ) {
|
|
|
- var data = event.data;
|
|
|
-
|
|
|
- // Make sure we're dealing with JSON
|
|
|
- if( typeof data === 'string' && data.charAt( 0 ) === '{' && data.charAt( data.length - 1 ) === '}' ) {
|
|
|
- data = JSON.parse( data );
|
|
|
-
|
|
|
- // Check if the requested method can be found
|
|
|
- if( data.method && typeof Reveal[data.method] === 'function' ) {
|
|
|
- Reveal[data.method].apply( Reveal, data.args );
|
|
|
- }
|
|
|
- }
|
|
|
- }, false );
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Applies the configuration settings from the config
|
|
|
- * object. May be called multiple times.
|
|
|
- *
|
|
|
- * @param {object} options
|
|
|
- */
|
|
|
- function configure( options ) {
|
|
|
-
|
|
|
- var oldTransition = config.transition;
|
|
|
-
|
|
|
- // New config options may be passed when this method
|
|
|
- // is invoked through the API after initialization
|
|
|
- if( typeof options === 'object' ) extend( config, options );
|
|
|
-
|
|
|
- // Abort if reveal.js hasn't finished loading, config
|
|
|
- // changes will be applied automatically once loading
|
|
|
- // finishes
|
|
|
- if( loaded === false ) return;
|
|
|
-
|
|
|
- var numberOfSlides = dom.wrapper.querySelectorAll( SLIDES_SELECTOR ).length;
|
|
|
-
|
|
|
- // Remove the previously configured transition class
|
|
|
- dom.wrapper.classList.remove( oldTransition );
|
|
|
-
|
|
|
- // 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';
|
|
|
-
|
|
|
- dom.controls.setAttribute( 'data-controls-layout', config.controlsLayout );
|
|
|
- dom.controls.setAttribute( 'data-controls-back-arrows', config.controlsBackArrows );
|
|
|
-
|
|
|
- if( config.shuffle ) {
|
|
|
- shuffle();
|
|
|
- }
|
|
|
-
|
|
|
- if( config.rtl ) {
|
|
|
- dom.wrapper.classList.add( 'rtl' );
|
|
|
- }
|
|
|
- else {
|
|
|
- dom.wrapper.classList.remove( 'rtl' );
|
|
|
- }
|
|
|
-
|
|
|
- if( config.center ) {
|
|
|
- dom.wrapper.classList.add( 'center' );
|
|
|
- }
|
|
|
- else {
|
|
|
- dom.wrapper.classList.remove( 'center' );
|
|
|
- }
|
|
|
-
|
|
|
- // Exit the paused mode if it was configured off
|
|
|
- if( config.pause === false ) {
|
|
|
- resume();
|
|
|
- }
|
|
|
-
|
|
|
- if( config.showNotes ) {
|
|
|
- dom.speakerNotes.setAttribute( 'data-layout', typeof config.showNotes === 'string' ? config.showNotes : 'inline' );
|
|
|
- }
|
|
|
-
|
|
|
- if( config.mouseWheel ) {
|
|
|
- document.addEventListener( 'DOMMouseScroll', onDocumentMouseScroll, false ); // FF
|
|
|
- document.addEventListener( 'mousewheel', onDocumentMouseScroll, false );
|
|
|
- }
|
|
|
- else {
|
|
|
- document.removeEventListener( 'DOMMouseScroll', onDocumentMouseScroll, false ); // FF
|
|
|
- document.removeEventListener( 'mousewheel', onDocumentMouseScroll, false );
|
|
|
- }
|
|
|
-
|
|
|
- // Rolling 3D links
|
|
|
- if( config.rollingLinks ) {
|
|
|
- enableRollingLinks();
|
|
|
- }
|
|
|
- else {
|
|
|
- disableRollingLinks();
|
|
|
- }
|
|
|
-
|
|
|
- // Iframe link previews
|
|
|
- if( config.previewLinks ) {
|
|
|
- enablePreviewLinks();
|
|
|
- disablePreviewLinks( '[data-preview-link=false]' );
|
|
|
- }
|
|
|
- else {
|
|
|
- disablePreviewLinks();
|
|
|
- enablePreviewLinks( '[data-preview-link]:not([data-preview-link=false])' );
|
|
|
- }
|
|
|
-
|
|
|
- // Remove existing auto-slide controls
|
|
|
- if( autoSlidePlayer ) {
|
|
|
- autoSlidePlayer.destroy();
|
|
|
- autoSlidePlayer = null;
|
|
|
- }
|
|
|
-
|
|
|
- // Generate auto-slide controls if needed
|
|
|
- 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;
|
|
|
- }
|
|
|
-
|
|
|
- // When fragments are turned off they should be visible
|
|
|
- if( config.fragments === false ) {
|
|
|
- toArray( dom.slides.querySelectorAll( '.fragment' ) ).forEach( function( element ) {
|
|
|
- element.classList.add( 'visible' );
|
|
|
- element.classList.remove( 'current-fragment' );
|
|
|
- } );
|
|
|
- }
|
|
|
-
|
|
|
- // Slide numbers
|
|
|
- var slideNumberDisplay = 'none';
|
|
|
- if( config.slideNumber && !isPrintingPDF() ) {
|
|
|
- if( config.showSlideNumber === 'all' ) {
|
|
|
- slideNumberDisplay = 'block';
|
|
|
- }
|
|
|
- else if( config.showSlideNumber === 'speaker' && isSpeakerNotes() ) {
|
|
|
- slideNumberDisplay = 'block';
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- dom.slideNumber.style.display = slideNumberDisplay;
|
|
|
-
|
|
|
- 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.pointerEnabled ) {
|
|
|
- // IE 11 uses un-prefixed version of pointer events
|
|
|
- dom.wrapper.addEventListener( 'pointerdown', onPointerDown, false );
|
|
|
- dom.wrapper.addEventListener( 'pointermove', onPointerMove, false );
|
|
|
- dom.wrapper.addEventListener( 'pointerup', onPointerUp, false );
|
|
|
- }
|
|
|
- else if( window.navigator.msPointerEnabled ) {
|
|
|
- // IE 10 uses prefixed version of pointer events
|
|
|
- dom.wrapper.addEventListener( 'MSPointerDown', onPointerDown, false );
|
|
|
- dom.wrapper.addEventListener( 'MSPointerMove', onPointerMove, false );
|
|
|
- dom.wrapper.addEventListener( 'MSPointerUp', onPointerUp, false );
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- if( config.keyboard ) {
|
|
|
- document.addEventListener( 'keydown', onDocumentKeyDown, false );
|
|
|
- document.addEventListener( 'keypress', onDocumentKeyPress, false );
|
|
|
- }
|
|
|
-
|
|
|
- if( config.progress && dom.progress ) {
|
|
|
- dom.progress.addEventListener( 'click', onProgressClicked, false );
|
|
|
- }
|
|
|
-
|
|
|
- if( config.focusBodyOnPageVisibilityChange ) {
|
|
|
- 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 );
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- // Listen to both touch and click events, in case the device
|
|
|
- // supports both
|
|
|
- var pointerEvents = [ 'touchstart', 'click' ];
|
|
|
-
|
|
|
- // Only support touch for Android, fixes double navigations in
|
|
|
- // stock browser
|
|
|
- if( UA.match( /android/gi ) ) {
|
|
|
- pointerEvents = [ 'touchstart' ];
|
|
|
- }
|
|
|
-
|
|
|
- pointerEvents.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 );
|
|
|
- document.removeEventListener( 'keypress', onDocumentKeyPress, 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 );
|
|
|
-
|
|
|
- // IE11
|
|
|
- if( window.navigator.pointerEnabled ) {
|
|
|
- dom.wrapper.removeEventListener( 'pointerdown', onPointerDown, false );
|
|
|
- dom.wrapper.removeEventListener( 'pointermove', onPointerMove, false );
|
|
|
- dom.wrapper.removeEventListener( 'pointerup', onPointerUp, false );
|
|
|
- }
|
|
|
- // IE10
|
|
|
- else 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.
|
|
|
- *
|
|
|
- * @param {object} a
|
|
|
- * @param {object} b
|
|
|
- */
|
|
|
- function extend( a, b ) {
|
|
|
-
|
|
|
- for( var i in b ) {
|
|
|
- a[ i ] = b[ i ];
|
|
|
- }
|
|
|
-
|
|
|
- return a;
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Converts the target object to an array.
|
|
|
- *
|
|
|
- * @param {object} o
|
|
|
- * @return {object[]}
|
|
|
- */
|
|
|
- function toArray( o ) {
|
|
|
-
|
|
|
- return Array.prototype.slice.call( o );
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Utility for deserializing a value.
|
|
|
- *
|
|
|
- * @param {*} value
|
|
|
- * @return {*}
|
|
|
- */
|
|
|
- function deserialize( value ) {
|
|
|
-
|
|
|
- if( typeof value === 'string' ) {
|
|
|
- if( value === 'null' ) return null;
|
|
|
- else if( value === 'true' ) return true;
|
|
|
- else if( value === 'false' ) return false;
|
|
|
- else if( value.match( /^-?[\d\.]+$/ ) ) return parseFloat( value );
|
|
|
- }
|
|
|
-
|
|
|
- return value;
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * 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
|
|
|
- *
|
|
|
- * @return {number}
|
|
|
- */
|
|
|
- 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.
|
|
|
- *
|
|
|
- * @param {HTMLElement} element
|
|
|
- * @param {string} transform
|
|
|
- */
|
|
|
- function transformElement( element, transform ) {
|
|
|
-
|
|
|
- element.style.WebkitTransform = transform;
|
|
|
- element.style.MozTransform = transform;
|
|
|
- element.style.msTransform = transform;
|
|
|
- element.style.transform = transform;
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Applies CSS transforms to the slides container. The container
|
|
|
- * is transformed from two separate sources: layout and the overview
|
|
|
- * mode.
|
|
|
- *
|
|
|
- * @param {object} transforms
|
|
|
- */
|
|
|
- function transformSlides( transforms ) {
|
|
|
-
|
|
|
- // Pick up new transforms from arguments
|
|
|
- if( typeof transforms.layout === 'string' ) slidesTransform.layout = transforms.layout;
|
|
|
- if( typeof transforms.overview === 'string' ) slidesTransform.overview = transforms.overview;
|
|
|
-
|
|
|
- // Apply the transforms to the slides container
|
|
|
- if( slidesTransform.layout ) {
|
|
|
- transformElement( dom.slides, slidesTransform.layout + ' ' + slidesTransform.overview );
|
|
|
- }
|
|
|
- else {
|
|
|
- transformElement( dom.slides, slidesTransform.overview );
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Injects the given CSS styles into the DOM.
|
|
|
- *
|
|
|
- * @param {string} value
|
|
|
- */
|
|
|
- function injectStyleSheet( value ) {
|
|
|
-
|
|
|
- var tag = document.createElement( 'style' );
|
|
|
- tag.type = 'text/css';
|
|
|
- if( tag.styleSheet ) {
|
|
|
- tag.styleSheet.cssText = value;
|
|
|
- }
|
|
|
- else {
|
|
|
- tag.appendChild( document.createTextNode( value ) );
|
|
|
- }
|
|
|
- document.getElementsByTagName( 'head' )[0].appendChild( tag );
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Find the closest parent that matches the given
|
|
|
- * selector.
|
|
|
- *
|
|
|
- * @param {HTMLElement} target The child element
|
|
|
- * @param {String} selector The CSS selector to match
|
|
|
- * the parents against
|
|
|
- *
|
|
|
- * @return {HTMLElement} The matched parent or null
|
|
|
- * if no matching parent was found
|
|
|
- */
|
|
|
- function closestParent( target, selector ) {
|
|
|
-
|
|
|
- var parent = target.parentNode;
|
|
|
-
|
|
|
- while( parent ) {
|
|
|
-
|
|
|
- // There's some overhead doing this each time, we don't
|
|
|
- // want to rewrite the element prototype but should still
|
|
|
- // be enough to feature detect once at startup...
|
|
|
- var matchesMethod = parent.matches || parent.matchesSelector || parent.msMatchesSelector;
|
|
|
-
|
|
|
- // If we find a match, we're all set
|
|
|
- if( matchesMethod && matchesMethod.call( parent, selector ) ) {
|
|
|
- return parent;
|
|
|
- }
|
|
|
-
|
|
|
- // Keep searching
|
|
|
- parent = parent.parentNode;
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- return null;
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Converts various color input formats to an {r:0,g:0,b:0} object.
|
|
|
- *
|
|
|
- * @param {string} color The string representation of a color
|
|
|
- * @example
|
|
|
- * colorToRgb('#000');
|
|
|
- * @example
|
|
|
- * colorToRgb('#000000');
|
|
|
- * @example
|
|
|
- * colorToRgb('rgb(0,0,0)');
|
|
|
- * @example
|
|
|
- * colorToRgb('rgba(0,0,0)');
|
|
|
- *
|
|
|
- * @return {{r: number, g: number, b: number, [a]: number}|null}
|
|
|
- */
|
|
|
- function colorToRgb( color ) {
|
|
|
-
|
|
|
- var hex3 = color.match( /^#([0-9a-f]{3})$/i );
|
|
|
- if( hex3 && hex3[1] ) {
|
|
|
- hex3 = hex3[1];
|
|
|
- return {
|
|
|
- r: parseInt( hex3.charAt( 0 ), 16 ) * 0x11,
|
|
|
- g: parseInt( hex3.charAt( 1 ), 16 ) * 0x11,
|
|
|
- b: parseInt( hex3.charAt( 2 ), 16 ) * 0x11
|
|
|
- };
|
|
|
- }
|
|
|
-
|
|
|
- var hex6 = color.match( /^#([0-9a-f]{6})$/i );
|
|
|
- if( hex6 && hex6[1] ) {
|
|
|
- hex6 = hex6[1];
|
|
|
- return {
|
|
|
- r: parseInt( hex6.substr( 0, 2 ), 16 ),
|
|
|
- g: parseInt( hex6.substr( 2, 2 ), 16 ),
|
|
|
- b: parseInt( hex6.substr( 4, 2 ), 16 )
|
|
|
- };
|
|
|
- }
|
|
|
-
|
|
|
- var rgb = color.match( /^rgb\s*\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*\)$/i );
|
|
|
- if( rgb ) {
|
|
|
- return {
|
|
|
- r: parseInt( rgb[1], 10 ),
|
|
|
- g: parseInt( rgb[2], 10 ),
|
|
|
- b: parseInt( rgb[3], 10 )
|
|
|
- };
|
|
|
- }
|
|
|
-
|
|
|
- var rgba = color.match( /^rgba\s*\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*\,\s*([\d]+|[\d]*.[\d]+)\s*\)$/i );
|
|
|
- if( rgba ) {
|
|
|
- return {
|
|
|
- r: parseInt( rgba[1], 10 ),
|
|
|
- g: parseInt( rgba[2], 10 ),
|
|
|
- b: parseInt( rgba[3], 10 ),
|
|
|
- a: parseFloat( rgba[4] )
|
|
|
- };
|
|
|
- }
|
|
|
-
|
|
|
- return null;
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Calculates brightness on a scale of 0-255.
|
|
|
- *
|
|
|
- * @param {string} color See colorToRgb for supported formats.
|
|
|
- * @see {@link colorToRgb}
|
|
|
- */
|
|
|
- function colorBrightness( color ) {
|
|
|
-
|
|
|
- if( typeof color === 'string' ) color = colorToRgb( color );
|
|
|
-
|
|
|
- if( color ) {
|
|
|
- return ( color.r * 299 + color.g * 587 + color.b * 114 ) / 1000;
|
|
|
- }
|
|
|
-
|
|
|
- return null;
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Returns the remaining height within the parent of the
|
|
|
- * target element.
|
|
|
- *
|
|
|
- * remaining height = [ configured parent height ] - [ current parent height ]
|
|
|
- *
|
|
|
- * @param {HTMLElement} element
|
|
|
- * @param {number} [height]
|
|
|
- */
|
|
|
- function getRemainingHeight( element, height ) {
|
|
|
-
|
|
|
- height = height || 0;
|
|
|
-
|
|
|
- if( element ) {
|
|
|
- var newHeight, oldHeight = element.style.height;
|
|
|
-
|
|
|
- // Change the .stretch element height to 0 in order find the height of all
|
|
|
- // the other elements
|
|
|
- element.style.height = '0px';
|
|
|
- newHeight = height - element.parentNode.offsetHeight;
|
|
|
-
|
|
|
- // Restore the old height, just in case
|
|
|
- element.style.height = oldHeight + 'px';
|
|
|
-
|
|
|
- return newHeight;
|
|
|
- }
|
|
|
-
|
|
|
- return height;
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Checks if this instance is being used to print a PDF.
|
|
|
- */
|
|
|
- function isPrintingPDF() {
|
|
|
-
|
|
|
- return ( /print-pdf/gi ).test( window.location.search );
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * 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, args ) {
|
|
|
-
|
|
|
- var event = document.createEvent( 'HTMLEvents', 1, 2 );
|
|
|
- event.initEvent( type, true, true );
|
|
|
- extend( event, args );
|
|
|
- dom.wrapper.dispatchEvent( event );
|
|
|
-
|
|
|
- // If we're in an iframe, post each reveal.js event to the
|
|
|
- // parent window. Used by the notes plugin
|
|
|
- if( config.postMessageEvents && window.parent !== window.self ) {
|
|
|
- window.parent.postMessage( JSON.stringify({ namespace: 'reveal', eventName: type, state: getState() }), '*' );
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Wrap all links in 3D goodness.
|
|
|
- */
|
|
|
- function enableRollingLinks() {
|
|
|
-
|
|
|
- if( features.transforms3d && !( 'msPerspective' in document.body.style ) ) {
|
|
|
- var anchors = dom.wrapper.querySelectorAll( SLIDES_SELECTOR + ' a' );
|
|
|
-
|
|
|
- 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 = dom.wrapper.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.
|
|
|
- *
|
|
|
- * @param {string} [selector=a] - selector for anchors
|
|
|
- */
|
|
|
- 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( selector ) {
|
|
|
-
|
|
|
- var anchors = toArray( document.querySelectorAll( selector ? selector : '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.
|
|
|
- *
|
|
|
- * @param {string} url - url for preview iframe src
|
|
|
- */
|
|
|
- function showPreview( url ) {
|
|
|
-
|
|
|
- closeOverlay();
|
|
|
-
|
|
|
- dom.overlay = document.createElement( 'div' );
|
|
|
- dom.overlay.classList.add( 'overlay' );
|
|
|
- dom.overlay.classList.add( 'overlay-preview' );
|
|
|
- dom.wrapper.appendChild( dom.overlay );
|
|
|
-
|
|
|
- dom.overlay.innerHTML = [
|
|
|
- '<header>',
|
|
|
- '<a class="close" href="#"><span class="icon"></span></a>',
|
|
|
- '<a class="external" href="'+ url +'" target="_blank"><span class="icon"></span></a>',
|
|
|
- '</header>',
|
|
|
- '<div class="spinner"></div>',
|
|
|
- '<div class="viewport">',
|
|
|
- '<iframe src="'+ url +'"></iframe>',
|
|
|
- '<small class="viewport-inner">',
|
|
|
- '<span class="x-frame-error">Unable to load iframe. This is likely due to the site\'s policy (x-frame-options).</span>',
|
|
|
- '</small>',
|
|
|
- '</div>'
|
|
|
- ].join('');
|
|
|
-
|
|
|
- dom.overlay.querySelector( 'iframe' ).addEventListener( 'load', function( event ) {
|
|
|
- dom.overlay.classList.add( 'loaded' );
|
|
|
- }, false );
|
|
|
-
|
|
|
- dom.overlay.querySelector( '.close' ).addEventListener( 'click', function( event ) {
|
|
|
- closeOverlay();
|
|
|
- event.preventDefault();
|
|
|
- }, false );
|
|
|
-
|
|
|
- dom.overlay.querySelector( '.external' ).addEventListener( 'click', function( event ) {
|
|
|
- closeOverlay();
|
|
|
- }, false );
|
|
|
-
|
|
|
- setTimeout( function() {
|
|
|
- dom.overlay.classList.add( 'visible' );
|
|
|
- }, 1 );
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Open or close help overlay window.
|
|
|
- *
|
|
|
- * @param {Boolean} [override] Flag which overrides the
|
|
|
- * toggle logic and forcibly sets the desired state. True means
|
|
|
- * help is open, false means it's closed.
|
|
|
- */
|
|
|
- function toggleHelp( override ){
|
|
|
-
|
|
|
- if( typeof override === 'boolean' ) {
|
|
|
- override ? showHelp() : closeOverlay();
|
|
|
- }
|
|
|
- else {
|
|
|
- if( dom.overlay ) {
|
|
|
- closeOverlay();
|
|
|
- }
|
|
|
- else {
|
|
|
- showHelp();
|
|
|
- }
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Opens an overlay window with help material.
|
|
|
- */
|
|
|
- function showHelp() {
|
|
|
-
|
|
|
- if( config.help ) {
|
|
|
-
|
|
|
- closeOverlay();
|
|
|
-
|
|
|
- dom.overlay = document.createElement( 'div' );
|
|
|
- dom.overlay.classList.add( 'overlay' );
|
|
|
- dom.overlay.classList.add( 'overlay-help' );
|
|
|
- dom.wrapper.appendChild( dom.overlay );
|
|
|
-
|
|
|
- var html = '<p class="title">Keyboard Shortcuts</p><br/>';
|
|
|
-
|
|
|
- html += '<table><th>KEY</th><th>ACTION</th>';
|
|
|
- for( var key in keyboardShortcuts ) {
|
|
|
- html += '<tr><td>' + key + '</td><td>' + keyboardShortcuts[ key ] + '</td></tr>';
|
|
|
- }
|
|
|
-
|
|
|
- html += '</table>';
|
|
|
-
|
|
|
- dom.overlay.innerHTML = [
|
|
|
- '<header>',
|
|
|
- '<a class="close" href="#"><span class="icon"></span></a>',
|
|
|
- '</header>',
|
|
|
- '<div class="viewport">',
|
|
|
- '<div class="viewport-inner">'+ html +'</div>',
|
|
|
- '</div>'
|
|
|
- ].join('');
|
|
|
-
|
|
|
- dom.overlay.querySelector( '.close' ).addEventListener( 'click', function( event ) {
|
|
|
- closeOverlay();
|
|
|
- event.preventDefault();
|
|
|
- }, false );
|
|
|
-
|
|
|
- setTimeout( function() {
|
|
|
- dom.overlay.classList.add( 'visible' );
|
|
|
- }, 1 );
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Closes any currently open overlay.
|
|
|
- */
|
|
|
- function closeOverlay() {
|
|
|
-
|
|
|
- if( dom.overlay ) {
|
|
|
- dom.overlay.parentNode.removeChild( dom.overlay );
|
|
|
- dom.overlay = null;
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Applies JavaScript-controlled layout rules to the
|
|
|
- * presentation.
|
|
|
- */
|
|
|
- function layout() {
|
|
|
-
|
|
|
- if( dom.wrapper && !isPrintingPDF() ) {
|
|
|
-
|
|
|
- var size = getComputedSlideSize();
|
|
|
-
|
|
|
- // Layout the contents of the slides
|
|
|
- layoutSlideContents( config.width, config.height );
|
|
|
-
|
|
|
- dom.slides.style.width = size.width + 'px';
|
|
|
- dom.slides.style.height = size.height + 'px';
|
|
|
-
|
|
|
- // Determine scale of content to fit within available space
|
|
|
- scale = Math.min( size.presentationWidth / size.width, size.presentationHeight / size.height );
|
|
|
-
|
|
|
- // Respect max/min scale settings
|
|
|
- scale = Math.max( scale, config.minScale );
|
|
|
- scale = Math.min( scale, config.maxScale );
|
|
|
-
|
|
|
- // Don't apply any scaling styles if scale is 1
|
|
|
- if( scale === 1 ) {
|
|
|
- dom.slides.style.zoom = '';
|
|
|
- dom.slides.style.left = '';
|
|
|
- dom.slides.style.top = '';
|
|
|
- dom.slides.style.bottom = '';
|
|
|
- dom.slides.style.right = '';
|
|
|
- transformSlides( { layout: '' } );
|
|
|
- }
|
|
|
- else {
|
|
|
- // Prefer zoom for scaling up so that content remains crisp.
|
|
|
- // Don't use zoom to scale down since that can lead to shifts
|
|
|
- // in text layout/line breaks.
|
|
|
- if( scale > 1 && features.zoom ) {
|
|
|
- dom.slides.style.zoom = scale;
|
|
|
- dom.slides.style.left = '';
|
|
|
- dom.slides.style.top = '';
|
|
|
- dom.slides.style.bottom = '';
|
|
|
- dom.slides.style.right = '';
|
|
|
- transformSlides( { layout: '' } );
|
|
|
- }
|
|
|
- // Apply scale transform as a fallback
|
|
|
- else {
|
|
|
- dom.slides.style.zoom = '';
|
|
|
- dom.slides.style.left = '50%';
|
|
|
- dom.slides.style.top = '40%';
|
|
|
- dom.slides.style.bottom = 'auto';
|
|
|
- dom.slides.style.right = 'auto';
|
|
|
- transformSlides( { layout: 'translate(-50%, -50%) scale('+ scale +')' } );
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- // Select all slides, vertical and horizontal
|
|
|
- var slides = toArray( dom.wrapper.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( ( size.height - slide.scrollHeight ) / 2, 0 ) + 'px';
|
|
|
- }
|
|
|
- }
|
|
|
- else {
|
|
|
- slide.style.top = '';
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- updateProgress();
|
|
|
- updateParallax();
|
|
|
-
|
|
|
- if( isOverview() ) {
|
|
|
- updateOverview();
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Applies layout logic to the contents of all slides in
|
|
|
- * the presentation.
|
|
|
- *
|
|
|
- * @param {string|number} width
|
|
|
- * @param {string|number} height
|
|
|
- */
|
|
|
- function layoutSlideContents( width, height ) {
|
|
|
-
|
|
|
- // Handle sizing of elements with the 'stretch' class
|
|
|
- toArray( dom.slides.querySelectorAll( 'section > .stretch' ) ).forEach( function( element ) {
|
|
|
-
|
|
|
- // Determine how much vertical space we can use
|
|
|
- var remainingHeight = getRemainingHeight( element, height );
|
|
|
-
|
|
|
- // 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';
|
|
|
- }
|
|
|
-
|
|
|
- } );
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Calculates the computed pixel size of our slides. These
|
|
|
- * values are based on the width and height configuration
|
|
|
- * options.
|
|
|
- *
|
|
|
- * @param {number} [presentationWidth=dom.wrapper.offsetWidth]
|
|
|
- * @param {number} [presentationHeight=dom.wrapper.offsetHeight]
|
|
|
- */
|
|
|
- function getComputedSlideSize( presentationWidth, presentationHeight ) {
|
|
|
-
|
|
|
- var size = {
|
|
|
- // Slide size
|
|
|
- width: config.width,
|
|
|
- height: config.height,
|
|
|
-
|
|
|
- // Presentation size
|
|
|
- presentationWidth: presentationWidth || dom.wrapper.offsetWidth,
|
|
|
- presentationHeight: presentationHeight || dom.wrapper.offsetHeight
|
|
|
- };
|
|
|
-
|
|
|
- // Reduce available space by margin
|
|
|
- size.presentationWidth -= ( size.presentationWidth * config.margin );
|
|
|
- size.presentationHeight -= ( size.presentationHeight * config.margin );
|
|
|
-
|
|
|
- // Slide width may be a percentage of available width
|
|
|
- if( typeof size.width === 'string' && /%$/.test( size.width ) ) {
|
|
|
- size.width = parseInt( size.width, 10 ) / 100 * size.presentationWidth;
|
|
|
- }
|
|
|
-
|
|
|
- // Slide height may be a percentage of available height
|
|
|
- if( typeof size.height === 'string' && /%$/.test( size.height ) ) {
|
|
|
- size.height = parseInt( size.height, 10 ) / 100 * size.presentationHeight;
|
|
|
- }
|
|
|
-
|
|
|
- return size;
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Stores the vertical index of a stack so that the same
|
|
|
- * vertical slide can be selected when navigating to and
|
|
|
- * from the stack.
|
|
|
- *
|
|
|
- * @param {HTMLElement} stack The vertical stack element
|
|
|
- * @param {string|number} [v=0] Index to memorize
|
|
|
- */
|
|
|
- function setPreviousVerticalIndex( stack, v ) {
|
|
|
-
|
|
|
- if( typeof stack === 'object' && typeof stack.setAttribute === 'function' ) {
|
|
|
- stack.setAttribute( 'data-previous-indexv', v || 0 );
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Retrieves the vertical index which was stored using
|
|
|
- * #setPreviousVerticalIndex() or 0 if no previous index
|
|
|
- * exists.
|
|
|
- *
|
|
|
- * @param {HTMLElement} stack The vertical stack element
|
|
|
- */
|
|
|
- function getPreviousVerticalIndex( stack ) {
|
|
|
-
|
|
|
- if( typeof stack === 'object' && typeof stack.setAttribute === 'function' && stack.classList.contains( 'stack' ) ) {
|
|
|
- // Prefer manually defined start-indexv
|
|
|
- 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.
|
|
|
- */
|
|
|
- function activateOverview() {
|
|
|
-
|
|
|
- // Only proceed if enabled in config
|
|
|
- if( config.overview && !isOverview() ) {
|
|
|
-
|
|
|
- overview = true;
|
|
|
-
|
|
|
- dom.wrapper.classList.add( 'overview' );
|
|
|
- dom.wrapper.classList.remove( 'overview-deactivating' );
|
|
|
-
|
|
|
- if( features.overviewTransitions ) {
|
|
|
- setTimeout( function() {
|
|
|
- dom.wrapper.classList.add( 'overview-animated' );
|
|
|
- }, 1 );
|
|
|
- }
|
|
|
-
|
|
|
- // Don't auto-slide while in overview mode
|
|
|
- cancelAutoSlide();
|
|
|
-
|
|
|
- // Move the backgrounds element into the slide container to
|
|
|
- // that the same scaling is applied
|
|
|
- dom.slides.appendChild( dom.background );
|
|
|
-
|
|
|
- // Clicking on an overview slide navigates to it
|
|
|
- toArray( dom.wrapper.querySelectorAll( SLIDES_SELECTOR ) ).forEach( function( slide ) {
|
|
|
- if( !slide.classList.contains( 'stack' ) ) {
|
|
|
- slide.addEventListener( 'click', onOverviewSlideClicked, true );
|
|
|
- }
|
|
|
- } );
|
|
|
-
|
|
|
- // Calculate slide sizes
|
|
|
- var margin = 70;
|
|
|
- var slideSize = getComputedSlideSize();
|
|
|
- overviewSlideWidth = slideSize.width + margin;
|
|
|
- overviewSlideHeight = slideSize.height + margin;
|
|
|
-
|
|
|
- // Reverse in RTL mode
|
|
|
- if( config.rtl ) {
|
|
|
- overviewSlideWidth = -overviewSlideWidth;
|
|
|
- }
|
|
|
-
|
|
|
- updateSlidesVisibility();
|
|
|
- layoutOverview();
|
|
|
- updateOverview();
|
|
|
-
|
|
|
- layout();
|
|
|
-
|
|
|
- // Notify observers of the overview showing
|
|
|
- dispatchEvent( 'overviewshown', {
|
|
|
- 'indexh': indexh,
|
|
|
- 'indexv': indexv,
|
|
|
- 'currentSlide': currentSlide
|
|
|
- } );
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Uses CSS transforms to position all slides in a grid for
|
|
|
- * display inside of the overview mode.
|
|
|
- */
|
|
|
- function layoutOverview() {
|
|
|
-
|
|
|
- // Layout slides
|
|
|
- toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ).forEach( function( hslide, h ) {
|
|
|
- hslide.setAttribute( 'data-index-h', h );
|
|
|
- transformElement( hslide, 'translate3d(' + ( h * overviewSlideWidth ) + 'px, 0, 0)' );
|
|
|
-
|
|
|
- if( hslide.classList.contains( 'stack' ) ) {
|
|
|
-
|
|
|
- toArray( hslide.querySelectorAll( 'section' ) ).forEach( function( vslide, v ) {
|
|
|
- vslide.setAttribute( 'data-index-h', h );
|
|
|
- vslide.setAttribute( 'data-index-v', v );
|
|
|
-
|
|
|
- transformElement( vslide, 'translate3d(0, ' + ( v * overviewSlideHeight ) + 'px, 0)' );
|
|
|
- } );
|
|
|
-
|
|
|
- }
|
|
|
- } );
|
|
|
-
|
|
|
- // Layout slide backgrounds
|
|
|
- toArray( dom.background.childNodes ).forEach( function( hbackground, h ) {
|
|
|
- transformElement( hbackground, 'translate3d(' + ( h * overviewSlideWidth ) + 'px, 0, 0)' );
|
|
|
-
|
|
|
- toArray( hbackground.querySelectorAll( '.slide-background' ) ).forEach( function( vbackground, v ) {
|
|
|
- transformElement( vbackground, 'translate3d(0, ' + ( v * overviewSlideHeight ) + 'px, 0)' );
|
|
|
- } );
|
|
|
- } );
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Moves the overview viewport to the current slides.
|
|
|
- * Called each time the current slide changes.
|
|
|
- */
|
|
|
- function updateOverview() {
|
|
|
-
|
|
|
- var vmin = Math.min( window.innerWidth, window.innerHeight );
|
|
|
- var scale = Math.max( vmin / 5, 150 ) / vmin;
|
|
|
-
|
|
|
- transformSlides( {
|
|
|
- overview: [
|
|
|
- 'scale('+ scale +')',
|
|
|
- 'translateX('+ ( -indexh * overviewSlideWidth ) +'px)',
|
|
|
- 'translateY('+ ( -indexv * overviewSlideHeight ) +'px)'
|
|
|
- ].join( ' ' )
|
|
|
- } );
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Exits the slide overview and enters the currently
|
|
|
- * active slide.
|
|
|
- */
|
|
|
- function deactivateOverview() {
|
|
|
-
|
|
|
- // Only proceed if enabled in config
|
|
|
- if( config.overview ) {
|
|
|
-
|
|
|
- overview = false;
|
|
|
-
|
|
|
- dom.wrapper.classList.remove( 'overview' );
|
|
|
- dom.wrapper.classList.remove( 'overview-animated' );
|
|
|
-
|
|
|
- // Temporarily add a class so that transitions can do different things
|
|
|
- // depending on whether they are exiting/entering overview, or just
|
|
|
- // moving from slide to slide
|
|
|
- dom.wrapper.classList.add( 'overview-deactivating' );
|
|
|
-
|
|
|
- setTimeout( function () {
|
|
|
- dom.wrapper.classList.remove( 'overview-deactivating' );
|
|
|
- }, 1 );
|
|
|
-
|
|
|
- // Move the background element back out
|
|
|
- dom.wrapper.appendChild( dom.background );
|
|
|
-
|
|
|
- // Clean up changes made to slides
|
|
|
- toArray( dom.wrapper.querySelectorAll( SLIDES_SELECTOR ) ).forEach( function( slide ) {
|
|
|
- transformElement( slide, '' );
|
|
|
-
|
|
|
- slide.removeEventListener( 'click', onOverviewSlideClicked, true );
|
|
|
- } );
|
|
|
-
|
|
|
- // Clean up changes made to backgrounds
|
|
|
- toArray( dom.background.querySelectorAll( '.slide-background' ) ).forEach( function( background ) {
|
|
|
- transformElement( background, '' );
|
|
|
- } );
|
|
|
-
|
|
|
- transformSlides( { overview: '' } );
|
|
|
-
|
|
|
- slide( indexh, indexv );
|
|
|
-
|
|
|
- layout();
|
|
|
-
|
|
|
- cueAutoSlide();
|
|
|
-
|
|
|
- // Notify observers of the overview hiding
|
|
|
- dispatchEvent( 'overviewhidden', {
|
|
|
- 'indexh': indexh,
|
|
|
- 'indexv': indexv,
|
|
|
- 'currentSlide': currentSlide
|
|
|
- } );
|
|
|
-
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Toggles the slide overview mode on and off.
|
|
|
- *
|
|
|
- * @param {Boolean} [override] Flag which overrides the
|
|
|
- * toggle logic and forcibly sets the desired state. True means
|
|
|
- * overview is open, false means it's closed.
|
|
|
- */
|
|
|
- function toggleOverview( override ) {
|
|
|
-
|
|
|
- if( typeof override === 'boolean' ) {
|
|
|
- override ? activateOverview() : deactivateOverview();
|
|
|
- }
|
|
|
- else {
|
|
|
- isOverview() ? deactivateOverview() : activateOverview();
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Checks if the overview is currently active.
|
|
|
- *
|
|
|
- * @return {Boolean} true if the overview is active,
|
|
|
- * false otherwise
|
|
|
- */
|
|
|
- function isOverview() {
|
|
|
-
|
|
|
- return overview;
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Checks if the current or specified slide is vertical
|
|
|
- * (nested within another slide).
|
|
|
- *
|
|
|
- * @param {HTMLElement} [slide=currentSlide] The slide to check
|
|
|
- * orientation of
|
|
|
- * @return {Boolean}
|
|
|
- */
|
|
|
- function isVerticalSlide( slide ) {
|
|
|
-
|
|
|
- // 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.documentElement;
|
|
|
-
|
|
|
- // 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() {
|
|
|
-
|
|
|
- if( config.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( override ) {
|
|
|
-
|
|
|
- if( typeof override === 'boolean' ) {
|
|
|
- override ? pause() : resume();
|
|
|
- }
|
|
|
- else {
|
|
|
- isPaused() ? resume() : pause();
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Checks if we are currently in the paused mode.
|
|
|
- *
|
|
|
- * @return {Boolean}
|
|
|
- */
|
|
|
- function isPaused() {
|
|
|
-
|
|
|
- return dom.wrapper.classList.contains( 'paused' );
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Toggles the auto slide mode on and off.
|
|
|
- *
|
|
|
- * @param {Boolean} [override] Flag which sets the desired state.
|
|
|
- * True means autoplay starts, false means it stops.
|
|
|
- */
|
|
|
-
|
|
|
- function toggleAutoSlide( override ) {
|
|
|
-
|
|
|
- if( typeof override === 'boolean' ) {
|
|
|
- override ? resumeAutoSlide() : pauseAutoSlide();
|
|
|
- }
|
|
|
-
|
|
|
- else {
|
|
|
- autoSlidePaused ? resumeAutoSlide() : pauseAutoSlide();
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Checks if the auto slide mode is currently on.
|
|
|
- *
|
|
|
- * @return {Boolean}
|
|
|
- */
|
|
|
- function isAutoSliding() {
|
|
|
-
|
|
|
- return !!( autoSlide && !autoSlidePaused );
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Steps from the current point in the presentation to the
|
|
|
- * slide which matches the specified horizontal and vertical
|
|
|
- * indices.
|
|
|
- *
|
|
|
- * @param {number} [h=indexh] Horizontal index of the target slide
|
|
|
- * @param {number} [v=indexv] Vertical index of the target slide
|
|
|
- * @param {number} [f] Index of a fragment within the
|
|
|
- * target slide to activate
|
|
|
- * @param {number} [o] Origin for use in multimaster environments
|
|
|
- */
|
|
|
- function slide( h, v, f, o ) {
|
|
|
-
|
|
|
- // Remember where we were at before
|
|
|
- previousSlide = currentSlide;
|
|
|
-
|
|
|
- // Query all horizontal slides in the deck
|
|
|
- var horizontalSlides = dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR );
|
|
|
-
|
|
|
- // Abort if there are no slides
|
|
|
- if( horizontalSlides.length === 0 ) return;
|
|
|
-
|
|
|
- // If no vertical index is specified and the upcoming slide is a
|
|
|
- // stack, resume at its previous vertical index
|
|
|
- if( v === undefined && !isOverview() ) {
|
|
|
- v = getPreviousVerticalIndex( horizontalSlides[ h ] );
|
|
|
- }
|
|
|
-
|
|
|
- // If we were on a vertical stack, remember what vertical index
|
|
|
- // it was on so we can resume at the same position when returning
|
|
|
- if( previousSlide && previousSlide.parentNode && previousSlide.parentNode.classList.contains( 'stack' ) ) {
|
|
|
- setPreviousVerticalIndex( previousSlide.parentNode, indexv );
|
|
|
- }
|
|
|
-
|
|
|
- // Remember the state before this slide
|
|
|
- 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() );
|
|
|
- }
|
|
|
-
|
|
|
- // Update the overview if it's currently active
|
|
|
- if( isOverview() ) {
|
|
|
- updateOverview();
|
|
|
- }
|
|
|
-
|
|
|
- // 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' );
|
|
|
- previousSlide.setAttribute( 'aria-hidden', 'true' );
|
|
|
-
|
|
|
- // Reset all slides upon navigate to home
|
|
|
- // Issue: #285
|
|
|
- if ( dom.wrapper.querySelector( HOME_SLIDE_SELECTOR ).classList.contains( 'present' ) ) {
|
|
|
- // Launch async task
|
|
|
- setTimeout( function () {
|
|
|
- var slides = toArray( dom.wrapper.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 || !previousSlide ) {
|
|
|
- stopEmbeddedContent( previousSlide );
|
|
|
- startEmbeddedContent( currentSlide );
|
|
|
- }
|
|
|
-
|
|
|
- // Announce the current slide contents, for screen readers
|
|
|
- dom.statusDiv.textContent = getStatusText( currentSlide );
|
|
|
-
|
|
|
- updateControls();
|
|
|
- updateProgress();
|
|
|
- updateBackground();
|
|
|
- updateParallax();
|
|
|
- updateSlideNumber();
|
|
|
- updateNotes();
|
|
|
-
|
|
|
- // 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();
|
|
|
-
|
|
|
- // Write the current hash to the URL
|
|
|
- writeURL();
|
|
|
-
|
|
|
- sortAllFragments();
|
|
|
-
|
|
|
- updateControls();
|
|
|
- updateProgress();
|
|
|
- updateSlideNumber();
|
|
|
- updateSlidesVisibility();
|
|
|
- updateBackground( true );
|
|
|
- updateNotesVisibility();
|
|
|
- updateNotes();
|
|
|
-
|
|
|
- formatEmbeddedContent();
|
|
|
-
|
|
|
- // Start or stop embedded content depending on global config
|
|
|
- if( config.autoPlayMedia === false ) {
|
|
|
- stopEmbeddedContent( currentSlide, { unloadIframes: false } );
|
|
|
- }
|
|
|
- else {
|
|
|
- startEmbeddedContent( currentSlide );
|
|
|
- }
|
|
|
-
|
|
|
- if( isOverview() ) {
|
|
|
- layoutOverview();
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Resets all vertical slides so that only the first
|
|
|
- * is visible.
|
|
|
- */
|
|
|
- function resetVerticalSlides() {
|
|
|
-
|
|
|
- var horizontalSlides = toArray( dom.wrapper.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' );
|
|
|
- verticalSlide.setAttribute( 'aria-hidden', 'true' );
|
|
|
- }
|
|
|
-
|
|
|
- } );
|
|
|
-
|
|
|
- } );
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Sorts and formats all of fragments in the
|
|
|
- * presentation.
|
|
|
- */
|
|
|
- function sortAllFragments() {
|
|
|
-
|
|
|
- var horizontalSlides = toArray( dom.wrapper.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' ) );
|
|
|
-
|
|
|
- } );
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Randomly shuffles all slides in the deck.
|
|
|
- */
|
|
|
- function shuffle() {
|
|
|
-
|
|
|
- var slides = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) );
|
|
|
-
|
|
|
- slides.forEach( function( slide ) {
|
|
|
-
|
|
|
- // Insert this slide next to another random slide. This may
|
|
|
- // cause the slide to insert before itself but that's fine.
|
|
|
- dom.slides.insertBefore( slide, slides[ Math.floor( Math.random() * slides.length ) ] );
|
|
|
-
|
|
|
- } );
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Updates one dimension of slides by showing the slide
|
|
|
- * with the specified index.
|
|
|
- *
|
|
|
- * @param {string} selector A CSS selector that will fetch
|
|
|
- * the group of slides we are working with
|
|
|
- * @param {number} index The index of the slide that should be
|
|
|
- * shown
|
|
|
- *
|
|
|
- * @return {number} The index of the slide that is now shown,
|
|
|
- * might differ from the passed in index if it was out of
|
|
|
- * bounds.
|
|
|
- */
|
|
|
- function updateSlides( selector, index ) {
|
|
|
-
|
|
|
- // Select all slides and convert the NodeList result to
|
|
|
- // an array
|
|
|
- var slides = toArray( dom.wrapper.querySelectorAll( selector ) ),
|
|
|
- slidesLength = slides.length;
|
|
|
-
|
|
|
- var printMode = isPrintingPDF();
|
|
|
-
|
|
|
- if( slidesLength ) {
|
|
|
-
|
|
|
- // Should the index loop?
|
|
|
- if( config.loop ) {
|
|
|
- index %= slidesLength;
|
|
|
-
|
|
|
- if( index < 0 ) {
|
|
|
- index = slidesLength + index;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- // Enforce max and minimum index bounds
|
|
|
- index = Math.max( Math.min( index, slidesLength - 1 ), 0 );
|
|
|
-
|
|
|
- for( 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', '' );
|
|
|
- element.setAttribute( 'aria-hidden', 'true' );
|
|
|
-
|
|
|
- // If this element contains vertical slides
|
|
|
- if( element.querySelector( 'section' ) ) {
|
|
|
- element.classList.add( 'stack' );
|
|
|
- }
|
|
|
-
|
|
|
- // If we're printing static slides, all slides are "present"
|
|
|
- if( printMode ) {
|
|
|
- element.classList.add( 'present' );
|
|
|
- continue;
|
|
|
- }
|
|
|
-
|
|
|
- if( i < index ) {
|
|
|
- // Any element previous to index is given the 'past' class
|
|
|
- element.classList.add( reverse ? 'future' : 'past' );
|
|
|
-
|
|
|
- if( config.fragments ) {
|
|
|
- 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' );
|
|
|
-
|
|
|
- if( config.fragments ) {
|
|
|
- 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' );
|
|
|
- }
|
|
|
- }
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- // Mark the current slide as present
|
|
|
- slides[index].classList.add( 'present' );
|
|
|
- slides[index].removeAttribute( 'hidden' );
|
|
|
- slides[index].removeAttribute( 'aria-hidden' );
|
|
|
-
|
|
|
- // If this slide has a state associated with it, add it
|
|
|
- // onto the current state of the deck
|
|
|
- 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( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ),
|
|
|
- horizontalSlidesLength = horizontalSlides.length,
|
|
|
- distanceX,
|
|
|
- distanceY;
|
|
|
-
|
|
|
- if( horizontalSlidesLength && typeof indexh !== 'undefined' ) {
|
|
|
-
|
|
|
- // 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 : 2;
|
|
|
- }
|
|
|
-
|
|
|
- // All slides need to be visible when exporting to PDF
|
|
|
- if( isPrintingPDF() ) {
|
|
|
- viewDistance = Number.MAX_VALUE;
|
|
|
- }
|
|
|
-
|
|
|
- for( var x = 0; x < horizontalSlidesLength; x++ ) {
|
|
|
- var horizontalSlide = horizontalSlides[x];
|
|
|
-
|
|
|
- var verticalSlides = toArray( horizontalSlide.querySelectorAll( 'section' ) ),
|
|
|
- verticalSlidesLength = verticalSlides.length;
|
|
|
-
|
|
|
- // Determine how far away this slide is from the present
|
|
|
- distanceX = Math.abs( ( indexh || 0 ) - x ) || 0;
|
|
|
-
|
|
|
- // If the presentation is looped, distance should measure
|
|
|
- // 1 between the first and last slides
|
|
|
- if( config.loop ) {
|
|
|
- distanceX = Math.abs( ( ( indexh || 0 ) - x ) % ( horizontalSlidesLength - viewDistance ) ) || 0;
|
|
|
- }
|
|
|
-
|
|
|
- // Show the horizontal slide if it's within the view distance
|
|
|
- if( distanceX < viewDistance ) {
|
|
|
- loadSlide( horizontalSlide );
|
|
|
- }
|
|
|
- else {
|
|
|
- unloadSlide( horizontalSlide );
|
|
|
- }
|
|
|
-
|
|
|
- if( verticalSlidesLength ) {
|
|
|
-
|
|
|
- var oy = getPreviousVerticalIndex( horizontalSlide );
|
|
|
-
|
|
|
- for( var y = 0; y < verticalSlidesLength; y++ ) {
|
|
|
- var verticalSlide = verticalSlides[y];
|
|
|
-
|
|
|
- distanceY = x === ( indexh || 0 ) ? Math.abs( ( indexv || 0 ) - y ) : Math.abs( y - oy );
|
|
|
-
|
|
|
- if( distanceX + distanceY < viewDistance ) {
|
|
|
- loadSlide( verticalSlide );
|
|
|
- }
|
|
|
- else {
|
|
|
- unloadSlide( verticalSlide );
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- // Flag if there are ANY vertical slides, anywhere in the deck
|
|
|
- if( dom.wrapper.querySelectorAll( '.slides>section>section' ).length ) {
|
|
|
- dom.wrapper.classList.add( 'has-vertical-slides' );
|
|
|
- }
|
|
|
- else {
|
|
|
- dom.wrapper.classList.remove( 'has-vertical-slides' );
|
|
|
- }
|
|
|
-
|
|
|
- // Flag if there are ANY horizontal slides, anywhere in the deck
|
|
|
- if( dom.wrapper.querySelectorAll( '.slides>section' ).length > 1 ) {
|
|
|
- dom.wrapper.classList.add( 'has-horizontal-slides' );
|
|
|
- }
|
|
|
- else {
|
|
|
- dom.wrapper.classList.remove( 'has-horizontal-slides' );
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Pick up notes from the current slide and display them
|
|
|
- * to the viewer.
|
|
|
- *
|
|
|
- * @see {@link config.showNotes}
|
|
|
- */
|
|
|
- function updateNotes() {
|
|
|
-
|
|
|
- if( config.showNotes && dom.speakerNotes && currentSlide && !isPrintingPDF() ) {
|
|
|
-
|
|
|
- dom.speakerNotes.innerHTML = getSlideNotes() || '<span class="notes-placeholder">No notes on this slide.</span>';
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Updates the visibility of the speaker notes sidebar that
|
|
|
- * is used to share annotated slides. The notes sidebar is
|
|
|
- * only visible if showNotes is true and there are notes on
|
|
|
- * one or more slides in the deck.
|
|
|
- */
|
|
|
- function updateNotesVisibility() {
|
|
|
-
|
|
|
- if( config.showNotes && hasNotes() ) {
|
|
|
- dom.wrapper.classList.add( 'show-notes' );
|
|
|
- }
|
|
|
- else {
|
|
|
- dom.wrapper.classList.remove( 'show-notes' );
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Checks if there are speaker notes for ANY slide in the
|
|
|
- * presentation.
|
|
|
- */
|
|
|
- function hasNotes() {
|
|
|
-
|
|
|
- return dom.slides.querySelectorAll( '[data-notes], aside.notes' ).length > 0;
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Updates the progress bar to reflect the current slide.
|
|
|
- */
|
|
|
- function updateProgress() {
|
|
|
-
|
|
|
- // Update progress if enabled
|
|
|
- if( config.progress && dom.progressbar ) {
|
|
|
-
|
|
|
- dom.progressbar.style.width = getProgress() * dom.wrapper.offsetWidth + 'px';
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Updates the slide number div to reflect the current slide.
|
|
|
- *
|
|
|
- * The following slide number formats are available:
|
|
|
- * "h.v": horizontal . vertical slide number (default)
|
|
|
- * "h/v": horizontal / vertical slide number
|
|
|
- * "c": flattened slide number
|
|
|
- * "c/t": flattened slide number / total slides
|
|
|
- */
|
|
|
- function updateSlideNumber() {
|
|
|
-
|
|
|
- // Update slide number if enabled
|
|
|
- if( config.slideNumber && dom.slideNumber ) {
|
|
|
-
|
|
|
- var value = [];
|
|
|
- var format = 'h.v';
|
|
|
-
|
|
|
- // Check if a custom number format is available
|
|
|
- if( typeof config.slideNumber === 'string' ) {
|
|
|
- format = config.slideNumber;
|
|
|
- }
|
|
|
-
|
|
|
- switch( format ) {
|
|
|
- case 'c':
|
|
|
- value.push( getSlidePastCount() + 1 );
|
|
|
- break;
|
|
|
- case 'c/t':
|
|
|
- value.push( getSlidePastCount() + 1, '/', getTotalSlides() );
|
|
|
- break;
|
|
|
- case 'h/v':
|
|
|
- value.push( indexh + 1 );
|
|
|
- if( isVerticalSlide() ) value.push( '/', indexv + 1 );
|
|
|
- break;
|
|
|
- default:
|
|
|
- value.push( indexh + 1 );
|
|
|
- if( isVerticalSlide() ) value.push( '.', indexv + 1 );
|
|
|
- }
|
|
|
-
|
|
|
- dom.slideNumber.innerHTML = formatSlideNumber( value[0], value[1], value[2] );
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Applies HTML formatting to a slide number before it's
|
|
|
- * written to the DOM.
|
|
|
- *
|
|
|
- * @param {number} a Current slide
|
|
|
- * @param {string} delimiter Character to separate slide numbers
|
|
|
- * @param {(number|*)} b Total slides
|
|
|
- * @return {string} HTML string fragment
|
|
|
- */
|
|
|
- function formatSlideNumber( a, delimiter, b ) {
|
|
|
-
|
|
|
- if( typeof b === 'number' && !isNaN( b ) ) {
|
|
|
- return '<span class="slide-number-a">'+ a +'</span>' +
|
|
|
- '<span class="slide-number-delimiter">'+ delimiter +'</span>' +
|
|
|
- '<span class="slide-number-b">'+ b +'</span>';
|
|
|
- }
|
|
|
- else {
|
|
|
- return '<span class="slide-number-a">'+ a +'</span>';
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * 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' );
|
|
|
-
|
|
|
- // Set 'disabled' attribute on all directions
|
|
|
- node.setAttribute( 'disabled', 'disabled' );
|
|
|
- } );
|
|
|
-
|
|
|
- // Add the 'enabled' class to the available routes; remove 'disabled' attribute to enable buttons
|
|
|
- if( routes.left ) dom.controlsLeft.forEach( function( el ) { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
|
|
- if( routes.right ) dom.controlsRight.forEach( function( el ) { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
|
|
- if( routes.up ) dom.controlsUp.forEach( function( el ) { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
|
|
- if( routes.down ) dom.controlsDown.forEach( function( el ) { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
|
|
-
|
|
|
- // Prev/next buttons
|
|
|
- if( routes.left || routes.up ) dom.controlsPrev.forEach( function( el ) { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
|
|
- if( routes.right || routes.down ) dom.controlsNext.forEach( function( el ) { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
|
|
-
|
|
|
- // Highlight fragment directions
|
|
|
- if( currentSlide ) {
|
|
|
-
|
|
|
- // Always apply fragment decorator to prev/next buttons
|
|
|
- if( fragments.prev ) dom.controlsPrev.forEach( function( el ) { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
|
|
- if( fragments.next ) dom.controlsNext.forEach( function( el ) { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
|
|
-
|
|
|
- // Apply fragment decorators to directional buttons based on
|
|
|
- // what slide axis they are in
|
|
|
- if( isVerticalSlide( currentSlide ) ) {
|
|
|
- if( fragments.prev ) dom.controlsUp.forEach( function( el ) { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
|
|
- if( fragments.next ) dom.controlsDown.forEach( function( el ) { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
|
|
- }
|
|
|
- else {
|
|
|
- if( fragments.prev ) dom.controlsLeft.forEach( function( el ) { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
|
|
- if( fragments.next ) dom.controlsRight.forEach( function( el ) { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- if( config.controlsTutorial ) {
|
|
|
-
|
|
|
- // Highlight control arrows with an animation to ensure
|
|
|
- // that the viewer knows how to navigate
|
|
|
- if( !hasNavigatedDown && routes.down ) {
|
|
|
- dom.controlsDownArrow.classList.add( 'highlight' );
|
|
|
- }
|
|
|
- else {
|
|
|
- dom.controlsDownArrow.classList.remove( 'highlight' );
|
|
|
-
|
|
|
- if( !hasNavigatedRight && routes.right && indexv === 0 ) {
|
|
|
- dom.controlsRightArrow.classList.add( 'highlight' );
|
|
|
- }
|
|
|
- else {
|
|
|
- dom.controlsRightArrow.classList.remove( 'highlight' );
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Updates the background elements to reflect the current
|
|
|
- * slide.
|
|
|
- *
|
|
|
- * @param {boolean} includeAll If true, the backgrounds of
|
|
|
- * all vertical slides (not just the present) will be updated.
|
|
|
- */
|
|
|
- function updateBackground( includeAll ) {
|
|
|
-
|
|
|
- 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 ) {
|
|
|
-
|
|
|
- backgroundh.classList.remove( 'past' );
|
|
|
- backgroundh.classList.remove( 'present' );
|
|
|
- backgroundh.classList.remove( 'future' );
|
|
|
-
|
|
|
- if( h < indexh ) {
|
|
|
- backgroundh.classList.add( horizontalPast );
|
|
|
- }
|
|
|
- else if ( h > indexh ) {
|
|
|
- backgroundh.classList.add( horizontalFuture );
|
|
|
- }
|
|
|
- else {
|
|
|
- backgroundh.classList.add( 'present' );
|
|
|
-
|
|
|
- // Store a reference to the current background element
|
|
|
- currentBackground = backgroundh;
|
|
|
- }
|
|
|
-
|
|
|
- if( includeAll || h === indexh ) {
|
|
|
- toArray( backgroundh.querySelectorAll( '.slide-background' ) ).forEach( function( backgroundv, v ) {
|
|
|
-
|
|
|
- backgroundv.classList.remove( 'past' );
|
|
|
- backgroundv.classList.remove( 'present' );
|
|
|
- backgroundv.classList.remove( 'future' );
|
|
|
-
|
|
|
- if( v < indexv ) {
|
|
|
- backgroundv.classList.add( 'past' );
|
|
|
- }
|
|
|
- else if ( v > indexv ) {
|
|
|
- backgroundv.classList.add( 'future' );
|
|
|
- }
|
|
|
- else {
|
|
|
- backgroundv.classList.add( 'present' );
|
|
|
-
|
|
|
- // Only if this is the present horizontal and vertical slide
|
|
|
- if( h === indexh ) currentBackground = backgroundv;
|
|
|
- }
|
|
|
-
|
|
|
- } );
|
|
|
- }
|
|
|
-
|
|
|
- } );
|
|
|
-
|
|
|
- // Stop content inside of previous backgrounds
|
|
|
- if( previousBackground ) {
|
|
|
-
|
|
|
- stopEmbeddedContent( previousBackground );
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- // Start content in the current background
|
|
|
- if( currentBackground ) {
|
|
|
-
|
|
|
- startEmbeddedContent( currentBackground );
|
|
|
-
|
|
|
- var backgroundImageURL = currentBackground.style.backgroundImage || '';
|
|
|
-
|
|
|
- // Restart GIFs (doesn't work in Firefox)
|
|
|
- if( /\.gif/i.test( backgroundImageURL ) ) {
|
|
|
- currentBackground.style.backgroundImage = '';
|
|
|
- window.getComputedStyle( currentBackground ).opacity;
|
|
|
- currentBackground.style.backgroundImage = backgroundImageURL;
|
|
|
- }
|
|
|
-
|
|
|
- // Don't transition between identical backgrounds. This
|
|
|
- // prevents unwanted flicker.
|
|
|
- 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;
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- // If there's a background brightness flag for this slide,
|
|
|
- // bubble it to the .reveal container
|
|
|
- if( currentSlide ) {
|
|
|
- [ 'has-light-background', 'has-dark-background' ].forEach( function( classToBubble ) {
|
|
|
- if( currentSlide.classList.contains( classToBubble ) ) {
|
|
|
- dom.wrapper.classList.add( classToBubble );
|
|
|
- }
|
|
|
- else {
|
|
|
- dom.wrapper.classList.remove( classToBubble );
|
|
|
- }
|
|
|
- } );
|
|
|
- }
|
|
|
-
|
|
|
- // Allow the first background to apply without transition
|
|
|
- setTimeout( 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 = dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ),
|
|
|
- verticalSlides = dom.wrapper.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,
|
|
|
- horizontalSlideCount = horizontalSlides.length,
|
|
|
- horizontalOffsetMultiplier,
|
|
|
- horizontalOffset;
|
|
|
-
|
|
|
- if( typeof config.parallaxBackgroundHorizontal === 'number' ) {
|
|
|
- horizontalOffsetMultiplier = config.parallaxBackgroundHorizontal;
|
|
|
- }
|
|
|
- else {
|
|
|
- horizontalOffsetMultiplier = horizontalSlideCount > 1 ? ( backgroundWidth - slideWidth ) / ( horizontalSlideCount-1 ) : 0;
|
|
|
- }
|
|
|
-
|
|
|
- horizontalOffset = horizontalOffsetMultiplier * indexh * -1;
|
|
|
-
|
|
|
- var slideHeight = dom.background.offsetHeight,
|
|
|
- verticalSlideCount = verticalSlides.length,
|
|
|
- verticalOffsetMultiplier,
|
|
|
- verticalOffset;
|
|
|
-
|
|
|
- if( typeof config.parallaxBackgroundVertical === 'number' ) {
|
|
|
- verticalOffsetMultiplier = config.parallaxBackgroundVertical;
|
|
|
- }
|
|
|
- else {
|
|
|
- verticalOffsetMultiplier = ( backgroundHeight - slideHeight ) / ( verticalSlideCount-1 );
|
|
|
- }
|
|
|
-
|
|
|
- verticalOffset = verticalSlideCount > 0 ? verticalOffsetMultiplier * indexv : 0;
|
|
|
-
|
|
|
- dom.background.style.backgroundPosition = horizontalOffset + 'px ' + -verticalOffset + 'px';
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Called when the given slide is within the configured view
|
|
|
- * distance. Shows the slide element and loads any content
|
|
|
- * that is set to load lazily (data-src).
|
|
|
- *
|
|
|
- * @param {HTMLElement} slide Slide to show
|
|
|
- */
|
|
|
- function loadSlide( slide, options ) {
|
|
|
-
|
|
|
- options = options || {};
|
|
|
-
|
|
|
- // Show the slide element
|
|
|
- slide.style.display = config.display;
|
|
|
-
|
|
|
- // Media elements with data-src attributes
|
|
|
- toArray( slide.querySelectorAll( 'img[data-src], video[data-src], audio[data-src]' ) ).forEach( function( element ) {
|
|
|
- element.setAttribute( 'src', element.getAttribute( 'data-src' ) );
|
|
|
- element.setAttribute( 'data-lazy-loaded', '' );
|
|
|
- element.removeAttribute( 'data-src' );
|
|
|
- } );
|
|
|
-
|
|
|
- // Media elements with <source> children
|
|
|
- toArray( slide.querySelectorAll( 'video, audio' ) ).forEach( function( media ) {
|
|
|
- var sources = 0;
|
|
|
-
|
|
|
- toArray( media.querySelectorAll( 'source[data-src]' ) ).forEach( function( source ) {
|
|
|
- source.setAttribute( 'src', source.getAttribute( 'data-src' ) );
|
|
|
- source.removeAttribute( 'data-src' );
|
|
|
- source.setAttribute( 'data-lazy-loaded', '' );
|
|
|
- sources += 1;
|
|
|
- } );
|
|
|
-
|
|
|
- // If we rewrote sources for this video/audio element, we need
|
|
|
- // to manually tell it to load from its new origin
|
|
|
- if( sources > 0 ) {
|
|
|
- media.load();
|
|
|
- }
|
|
|
- } );
|
|
|
-
|
|
|
-
|
|
|
- // Show the corresponding background element
|
|
|
- var indices = getIndices( slide );
|
|
|
- var background = getSlideBackground( indices.h, indices.v );
|
|
|
- if( background ) {
|
|
|
- background.style.display = 'block';
|
|
|
-
|
|
|
- // If the background contains media, load it
|
|
|
- if( background.hasAttribute( 'data-loaded' ) === false ) {
|
|
|
- background.setAttribute( 'data-loaded', 'true' );
|
|
|
-
|
|
|
- var backgroundImage = slide.getAttribute( 'data-background-image' ),
|
|
|
- backgroundVideo = slide.getAttribute( 'data-background-video' ),
|
|
|
- backgroundVideoLoop = slide.hasAttribute( 'data-background-video-loop' ),
|
|
|
- backgroundVideoMuted = slide.hasAttribute( 'data-background-video-muted' ),
|
|
|
- backgroundIframe = slide.getAttribute( 'data-background-iframe' );
|
|
|
-
|
|
|
- // Images
|
|
|
- if( backgroundImage ) {
|
|
|
- background.style.backgroundImage = 'url('+ backgroundImage +')';
|
|
|
- }
|
|
|
- // Videos
|
|
|
- else if ( backgroundVideo && !isSpeakerNotes() ) {
|
|
|
- var video = document.createElement( 'video' );
|
|
|
-
|
|
|
- if( backgroundVideoLoop ) {
|
|
|
- video.setAttribute( 'loop', '' );
|
|
|
- }
|
|
|
-
|
|
|
- if( backgroundVideoMuted ) {
|
|
|
- video.muted = true;
|
|
|
- }
|
|
|
-
|
|
|
- // Inline video playback works (at least in Mobile Safari) as
|
|
|
- // long as the video is muted and the `playsinline` attribute is
|
|
|
- // present
|
|
|
- if( isMobileDevice ) {
|
|
|
- video.muted = true;
|
|
|
- video.autoplay = true;
|
|
|
- video.setAttribute( 'playsinline', '' );
|
|
|
- }
|
|
|
-
|
|
|
- // Support comma separated lists of video sources
|
|
|
- backgroundVideo.split( ',' ).forEach( function( source ) {
|
|
|
- video.innerHTML += '<source src="'+ source +'">';
|
|
|
- } );
|
|
|
-
|
|
|
- background.appendChild( video );
|
|
|
- }
|
|
|
- // Iframes
|
|
|
- else if( backgroundIframe && options.excludeIframes !== true ) {
|
|
|
- var iframe = document.createElement( 'iframe' );
|
|
|
- iframe.setAttribute( 'allowfullscreen', '' );
|
|
|
- iframe.setAttribute( 'mozallowfullscreen', '' );
|
|
|
- iframe.setAttribute( 'webkitallowfullscreen', '' );
|
|
|
-
|
|
|
- // Only load autoplaying content when the slide is shown to
|
|
|
- // avoid having it play in the background
|
|
|
- if( /autoplay=(1|true|yes)/gi.test( backgroundIframe ) ) {
|
|
|
- iframe.setAttribute( 'data-src', backgroundIframe );
|
|
|
- }
|
|
|
- else {
|
|
|
- iframe.setAttribute( 'src', backgroundIframe );
|
|
|
- }
|
|
|
-
|
|
|
- iframe.style.width = '100%';
|
|
|
- iframe.style.height = '100%';
|
|
|
- iframe.style.maxHeight = '100%';
|
|
|
- iframe.style.maxWidth = '100%';
|
|
|
-
|
|
|
- background.appendChild( iframe );
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Unloads and hides the given slide. This is called when the
|
|
|
- * slide is moved outside of the configured view distance.
|
|
|
- *
|
|
|
- * @param {HTMLElement} slide
|
|
|
- */
|
|
|
- function unloadSlide( slide ) {
|
|
|
-
|
|
|
- // Hide the slide element
|
|
|
- slide.style.display = 'none';
|
|
|
-
|
|
|
- // Hide the corresponding background element
|
|
|
- var indices = getIndices( slide );
|
|
|
- var background = getSlideBackground( indices.h, indices.v );
|
|
|
- if( background ) {
|
|
|
- background.style.display = 'none';
|
|
|
- }
|
|
|
-
|
|
|
- // Reset lazy-loaded media elements with src attributes
|
|
|
- toArray( slide.querySelectorAll( 'video[data-lazy-loaded][src], audio[data-lazy-loaded][src]' ) ).forEach( function( element ) {
|
|
|
- element.setAttribute( 'data-src', element.getAttribute( 'src' ) );
|
|
|
- element.removeAttribute( 'src' );
|
|
|
- } );
|
|
|
-
|
|
|
- // Reset lazy-loaded media elements with <source> children
|
|
|
- toArray( slide.querySelectorAll( 'video[data-lazy-loaded] source[src], audio source[src]' ) ).forEach( function( source ) {
|
|
|
- source.setAttribute( 'data-src', source.getAttribute( 'src' ) );
|
|
|
- source.removeAttribute( 'src' );
|
|
|
- } );
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Determine what available routes there are for navigation.
|
|
|
- *
|
|
|
- * @return {{left: boolean, right: boolean, up: boolean, down: boolean}}
|
|
|
- */
|
|
|
- function availableRoutes() {
|
|
|
-
|
|
|
- var horizontalSlides = dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ),
|
|
|
- verticalSlides = dom.wrapper.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 {{prev: boolean, next: boolean}}
|
|
|
- */
|
|
|
- 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 };
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Enforces origin-specific format rules for embedded media.
|
|
|
- */
|
|
|
- function formatEmbeddedContent() {
|
|
|
-
|
|
|
- var _appendParamToIframeSource = function( sourceAttribute, sourceURL, param ) {
|
|
|
- toArray( dom.slides.querySelectorAll( 'iframe['+ sourceAttribute +'*="'+ sourceURL +'"]' ) ).forEach( function( el ) {
|
|
|
- var src = el.getAttribute( sourceAttribute );
|
|
|
- if( src && src.indexOf( param ) === -1 ) {
|
|
|
- el.setAttribute( sourceAttribute, src + ( !/\?/.test( src ) ? '?' : '&' ) + param );
|
|
|
- }
|
|
|
- });
|
|
|
- };
|
|
|
-
|
|
|
- // YouTube frames must include "?enablejsapi=1"
|
|
|
- _appendParamToIframeSource( 'src', 'youtube.com/embed/', 'enablejsapi=1' );
|
|
|
- _appendParamToIframeSource( 'data-src', 'youtube.com/embed/', 'enablejsapi=1' );
|
|
|
-
|
|
|
- // Vimeo frames must include "?api=1"
|
|
|
- _appendParamToIframeSource( 'src', 'player.vimeo.com/', 'api=1' );
|
|
|
- _appendParamToIframeSource( 'data-src', 'player.vimeo.com/', 'api=1' );
|
|
|
-
|
|
|
- // Always show media controls on mobile devices
|
|
|
- if( isMobileDevice ) {
|
|
|
- toArray( dom.slides.querySelectorAll( 'video, audio' ) ).forEach( function( el ) {
|
|
|
- el.controls = true;
|
|
|
- } );
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Start playback of any embedded content inside of
|
|
|
- * the given element.
|
|
|
- *
|
|
|
- * @param {HTMLElement} element
|
|
|
- */
|
|
|
- function startEmbeddedContent( element ) {
|
|
|
-
|
|
|
- if( element && !isSpeakerNotes() ) {
|
|
|
-
|
|
|
- // Restart GIFs
|
|
|
- toArray( element.querySelectorAll( 'img[src$=".gif"]' ) ).forEach( function( el ) {
|
|
|
- // Setting the same unchanged source like this was confirmed
|
|
|
- // to work in Chrome, FF & Safari
|
|
|
- el.setAttribute( 'src', el.getAttribute( 'src' ) );
|
|
|
- } );
|
|
|
-
|
|
|
- // HTML5 media elements
|
|
|
- toArray( element.querySelectorAll( 'video, audio' ) ).forEach( function( el ) {
|
|
|
- if( closestParent( el, '.fragment' ) && !closestParent( el, '.fragment.visible' ) ) {
|
|
|
- return;
|
|
|
- }
|
|
|
-
|
|
|
- // Prefer an explicit global autoplay setting
|
|
|
- var autoplay = config.autoPlayMedia;
|
|
|
-
|
|
|
- // If no global setting is available, fall back on the element's
|
|
|
- // own autoplay setting
|
|
|
- if( typeof autoplay !== 'boolean' ) {
|
|
|
- autoplay = el.hasAttribute( 'data-autoplay' ) || !!closestParent( el, '.slide-background' );
|
|
|
- }
|
|
|
-
|
|
|
- if( autoplay && typeof el.play === 'function' ) {
|
|
|
-
|
|
|
- if( el.readyState > 1 ) {
|
|
|
- startEmbeddedMedia( { target: el } );
|
|
|
- }
|
|
|
- else {
|
|
|
- el.removeEventListener( 'loadeddata', startEmbeddedMedia ); // remove first to avoid dupes
|
|
|
- el.addEventListener( 'loadeddata', startEmbeddedMedia );
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
- } );
|
|
|
-
|
|
|
- // Normal iframes
|
|
|
- toArray( element.querySelectorAll( 'iframe[src]' ) ).forEach( function( el ) {
|
|
|
- if( closestParent( el, '.fragment' ) && !closestParent( el, '.fragment.visible' ) ) {
|
|
|
- return;
|
|
|
- }
|
|
|
-
|
|
|
- startEmbeddedIframe( { target: el } );
|
|
|
- } );
|
|
|
-
|
|
|
- // Lazy loading iframes
|
|
|
- toArray( element.querySelectorAll( 'iframe[data-src]' ) ).forEach( function( el ) {
|
|
|
- if( closestParent( el, '.fragment' ) && !closestParent( el, '.fragment.visible' ) ) {
|
|
|
- return;
|
|
|
- }
|
|
|
-
|
|
|
- if( el.getAttribute( 'src' ) !== el.getAttribute( 'data-src' ) ) {
|
|
|
- el.removeEventListener( 'load', startEmbeddedIframe ); // remove first to avoid dupes
|
|
|
- el.addEventListener( 'load', startEmbeddedIframe );
|
|
|
- el.setAttribute( 'src', el.getAttribute( 'data-src' ) );
|
|
|
- }
|
|
|
- } );
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Starts playing an embedded video/audio element after
|
|
|
- * it has finished loading.
|
|
|
- *
|
|
|
- * @param {object} event
|
|
|
- */
|
|
|
- function startEmbeddedMedia( event ) {
|
|
|
-
|
|
|
- var isAttachedToDOM = !!closestParent( event.target, 'html' ),
|
|
|
- isVisible = !!closestParent( event.target, '.present' );
|
|
|
-
|
|
|
- if( isAttachedToDOM && isVisible ) {
|
|
|
- event.target.currentTime = 0;
|
|
|
- event.target.play();
|
|
|
- }
|
|
|
-
|
|
|
- event.target.removeEventListener( 'loadeddata', startEmbeddedMedia );
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * "Starts" the content of an embedded iframe using the
|
|
|
- * postMessage API.
|
|
|
- *
|
|
|
- * @param {object} event
|
|
|
- */
|
|
|
- function startEmbeddedIframe( event ) {
|
|
|
-
|
|
|
- var iframe = event.target;
|
|
|
-
|
|
|
- if( iframe && iframe.contentWindow ) {
|
|
|
-
|
|
|
- var isAttachedToDOM = !!closestParent( event.target, 'html' ),
|
|
|
- isVisible = !!closestParent( event.target, '.present' );
|
|
|
-
|
|
|
- if( isAttachedToDOM && isVisible ) {
|
|
|
-
|
|
|
- // Prefer an explicit global autoplay setting
|
|
|
- var autoplay = config.autoPlayMedia;
|
|
|
-
|
|
|
- // If no global setting is available, fall back on the element's
|
|
|
- // own autoplay setting
|
|
|
- if( typeof autoplay !== 'boolean' ) {
|
|
|
- autoplay = iframe.hasAttribute( 'data-autoplay' ) || !!closestParent( iframe, '.slide-background' );
|
|
|
- }
|
|
|
-
|
|
|
- // YouTube postMessage API
|
|
|
- if( /youtube\.com\/embed\//.test( iframe.getAttribute( 'src' ) ) && autoplay ) {
|
|
|
- iframe.contentWindow.postMessage( '{"event":"command","func":"playVideo","args":""}', '*' );
|
|
|
- }
|
|
|
- // Vimeo postMessage API
|
|
|
- else if( /player\.vimeo\.com\//.test( iframe.getAttribute( 'src' ) ) && autoplay ) {
|
|
|
- iframe.contentWindow.postMessage( '{"method":"play"}', '*' );
|
|
|
- }
|
|
|
- // Generic postMessage API
|
|
|
- else {
|
|
|
- iframe.contentWindow.postMessage( 'slide:start', '*' );
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Stop playback of any embedded content inside of
|
|
|
- * the targeted slide.
|
|
|
- *
|
|
|
- * @param {HTMLElement} element
|
|
|
- */
|
|
|
- function stopEmbeddedContent( element, options ) {
|
|
|
-
|
|
|
- options = extend( {
|
|
|
- // Defaults
|
|
|
- unloadIframes: true
|
|
|
- }, options || {} );
|
|
|
-
|
|
|
- if( element && element.parentNode ) {
|
|
|
- // HTML5 media elements
|
|
|
- toArray( element.querySelectorAll( 'video, audio' ) ).forEach( function( el ) {
|
|
|
- if( !el.hasAttribute( 'data-ignore' ) && typeof el.pause === 'function' ) {
|
|
|
- el.setAttribute('data-paused-by-reveal', '');
|
|
|
- el.pause();
|
|
|
- }
|
|
|
- } );
|
|
|
-
|
|
|
- // Generic postMessage API for non-lazy loaded iframes
|
|
|
- toArray( element.querySelectorAll( 'iframe' ) ).forEach( function( el ) {
|
|
|
- if( el.contentWindow ) el.contentWindow.postMessage( 'slide:stop', '*' );
|
|
|
- el.removeEventListener( 'load', startEmbeddedIframe );
|
|
|
- });
|
|
|
-
|
|
|
- // YouTube postMessage API
|
|
|
- toArray( element.querySelectorAll( 'iframe[src*="youtube.com/embed/"]' ) ).forEach( function( el ) {
|
|
|
- if( !el.hasAttribute( 'data-ignore' ) && el.contentWindow && typeof el.contentWindow.postMessage === 'function' ) {
|
|
|
- el.contentWindow.postMessage( '{"event":"command","func":"pauseVideo","args":""}', '*' );
|
|
|
- }
|
|
|
- });
|
|
|
-
|
|
|
- // Vimeo postMessage API
|
|
|
- toArray( element.querySelectorAll( 'iframe[src*="player.vimeo.com/"]' ) ).forEach( function( el ) {
|
|
|
- if( !el.hasAttribute( 'data-ignore' ) && el.contentWindow && typeof el.contentWindow.postMessage === 'function' ) {
|
|
|
- el.contentWindow.postMessage( '{"method":"pause"}', '*' );
|
|
|
- }
|
|
|
- });
|
|
|
-
|
|
|
- if( options.unloadIframes === true ) {
|
|
|
- // Unload lazy-loaded iframes
|
|
|
- toArray( element.querySelectorAll( 'iframe[data-src]' ) ).forEach( function( el ) {
|
|
|
- // Only removing the src doesn't actually unload the frame
|
|
|
- // in all browsers (Firefox) so we set it to blank first
|
|
|
- el.setAttribute( 'src', 'about:blank' );
|
|
|
- el.removeAttribute( 'src' );
|
|
|
- } );
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Returns the number of past slides. This can be used as a global
|
|
|
- * flattened index for slides.
|
|
|
- *
|
|
|
- * @return {number} Past slide count
|
|
|
- */
|
|
|
- function getSlidePastCount() {
|
|
|
-
|
|
|
- var horizontalSlides = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) );
|
|
|
-
|
|
|
- // The number of past slides
|
|
|
- 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++;
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- return pastCount;
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Returns a value ranging from 0-1 that represents
|
|
|
- * how far into the presentation we have navigated.
|
|
|
- *
|
|
|
- * @return {number}
|
|
|
- */
|
|
|
- function getProgress() {
|
|
|
-
|
|
|
- // The number of past and total slides
|
|
|
- var totalCount = getTotalSlides();
|
|
|
- var pastCount = getSlidePastCount();
|
|
|
-
|
|
|
- if( currentSlide ) {
|
|
|
-
|
|
|
- var allFragments = currentSlide.querySelectorAll( '.fragment' );
|
|
|
-
|
|
|
- // If there are fragments in the current slide those should be
|
|
|
- // accounted for in the progress.
|
|
|
- if( allFragments.length > 0 ) {
|
|
|
- var visibleFragments = currentSlide.querySelectorAll( '.fragment.visible' );
|
|
|
-
|
|
|
- // This value represents how big a portion of the slide progress
|
|
|
- // that is made up by its fragments (0-1)
|
|
|
- var fragmentWeight = 0.9;
|
|
|
-
|
|
|
- // Add fragment progress to the past slide count
|
|
|
- pastCount += ( visibleFragments.length / allFragments.length ) * fragmentWeight;
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- return pastCount / ( totalCount - 1 );
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Checks if this presentation is running inside of the
|
|
|
- * speaker notes window.
|
|
|
- *
|
|
|
- * @return {boolean}
|
|
|
- */
|
|
|
- function isSpeakerNotes() {
|
|
|
-
|
|
|
- return !!window.location.search.match( /receiver/gi );
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Reads the current URL (hash) and navigates accordingly.
|
|
|
- */
|
|
|
- function readURL() {
|
|
|
-
|
|
|
- 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 ) {
|
|
|
- var element;
|
|
|
-
|
|
|
- // Ensure the named link is a valid HTML ID attribute
|
|
|
- if( /^[a-zA-Z][\w:.-]*$/.test( name ) ) {
|
|
|
- // Find the slide with the specified ID
|
|
|
- element = document.getElementById( 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 if( currentSlide ) {
|
|
|
- var url = '/';
|
|
|
-
|
|
|
- // Attempt to create a named link based on the slide's ID
|
|
|
- var id = currentSlide.getAttribute( 'id' );
|
|
|
- if( id ) {
|
|
|
- id = id.replace( /[^a-zA-Z0-9\-\_\:\.]/g, '' );
|
|
|
- }
|
|
|
-
|
|
|
- // If the current slide has an ID, use that as a named link
|
|
|
- if( typeof id === 'string' && id.length ) {
|
|
|
- url = '/' + 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 and fragment of the current,
|
|
|
- * or specified, slide.
|
|
|
- *
|
|
|
- * @param {HTMLElement} [slide] If specified, the returned
|
|
|
- * index will be for this slide rather than the currently
|
|
|
- * active one
|
|
|
- *
|
|
|
- * @return {{h: number, v: number, f: number}}
|
|
|
- */
|
|
|
- function getIndices( slide ) {
|
|
|
-
|
|
|
- // By default, return the current indices
|
|
|
- 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( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) );
|
|
|
-
|
|
|
- // Now that we know which the horizontal slide is, get its index
|
|
|
- h = Math.max( horizontalSlides.indexOf( slideh ), 0 );
|
|
|
-
|
|
|
- // Assume we're not vertical
|
|
|
- v = undefined;
|
|
|
-
|
|
|
- // If this is a vertical slide, grab the vertical index
|
|
|
- if( isVertical ) {
|
|
|
- v = Math.max( toArray( slide.parentNode.querySelectorAll( 'section' ) ).indexOf( slide ), 0 );
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- if( !slide && currentSlide ) {
|
|
|
- var hasFragments = currentSlide.querySelectorAll( '.fragment' ).length > 0;
|
|
|
- if( hasFragments ) {
|
|
|
- var currentFragment = currentSlide.querySelector( '.current-fragment' );
|
|
|
- if( currentFragment && currentFragment.hasAttribute( 'data-fragment-index' ) ) {
|
|
|
- f = parseInt( currentFragment.getAttribute( 'data-fragment-index' ), 10 );
|
|
|
- }
|
|
|
- else {
|
|
|
- f = currentSlide.querySelectorAll( '.fragment.visible' ).length - 1;
|
|
|
- }
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- return { h: h, v: v, f: f };
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Retrieves all slides in this presentation.
|
|
|
- */
|
|
|
- function getSlides() {
|
|
|
-
|
|
|
- return toArray( dom.wrapper.querySelectorAll( SLIDES_SELECTOR + ':not(.stack)' ));
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Retrieves the total number of slides in this presentation.
|
|
|
- *
|
|
|
- * @return {number}
|
|
|
- */
|
|
|
- function getTotalSlides() {
|
|
|
-
|
|
|
- return getSlides().length;
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Returns the slide element matching the specified index.
|
|
|
- *
|
|
|
- * @return {HTMLElement}
|
|
|
- */
|
|
|
- function getSlide( x, y ) {
|
|
|
-
|
|
|
- var horizontalSlide = dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR )[ x ];
|
|
|
- var verticalSlides = horizontalSlide && horizontalSlide.querySelectorAll( 'section' );
|
|
|
-
|
|
|
- if( verticalSlides && verticalSlides.length && typeof y === 'number' ) {
|
|
|
- return verticalSlides ? verticalSlides[ y ] : undefined;
|
|
|
- }
|
|
|
-
|
|
|
- return horizontalSlide;
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Returns the background element for the given slide.
|
|
|
- * All slides, even the ones with no background properties
|
|
|
- * defined, have a background element so as long as the
|
|
|
- * index is valid an element will be returned.
|
|
|
- *
|
|
|
- * @param {number} x Horizontal background index
|
|
|
- * @param {number} y Vertical background index
|
|
|
- * @return {(HTMLElement[]|*)}
|
|
|
- */
|
|
|
- function getSlideBackground( x, y ) {
|
|
|
-
|
|
|
- var slide = getSlide( x, y );
|
|
|
- if( slide ) {
|
|
|
- return slide.slideBackgroundElement;
|
|
|
- }
|
|
|
-
|
|
|
- return undefined;
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Retrieves the speaker notes from a slide. Notes can be
|
|
|
- * defined in two ways:
|
|
|
- * 1. As a data-notes attribute on the slide <section>
|
|
|
- * 2. As an <aside class="notes"> inside of the slide
|
|
|
- *
|
|
|
- * @param {HTMLElement} [slide=currentSlide]
|
|
|
- * @return {(string|null)}
|
|
|
- */
|
|
|
- function getSlideNotes( slide ) {
|
|
|
-
|
|
|
- // Default to the current slide
|
|
|
- slide = slide || currentSlide;
|
|
|
-
|
|
|
- // Notes can be specified via the data-notes attribute...
|
|
|
- if( slide.hasAttribute( 'data-notes' ) ) {
|
|
|
- return slide.getAttribute( 'data-notes' );
|
|
|
- }
|
|
|
-
|
|
|
- // ... or using an <aside class="notes"> element
|
|
|
- var notesElement = slide.querySelector( 'aside.notes' );
|
|
|
- if( notesElement ) {
|
|
|
- return notesElement.innerHTML;
|
|
|
- }
|
|
|
-
|
|
|
- return null;
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Retrieves the current state of the presentation as
|
|
|
- * an object. This state can then be restored at any
|
|
|
- * time.
|
|
|
- *
|
|
|
- * @return {{indexh: number, indexv: number, indexf: number, paused: boolean, overview: boolean}}
|
|
|
- */
|
|
|
- function getState() {
|
|
|
-
|
|
|
- var indices = getIndices();
|
|
|
-
|
|
|
- return {
|
|
|
- indexh: indices.h,
|
|
|
- indexv: indices.v,
|
|
|
- indexf: indices.f,
|
|
|
- paused: isPaused(),
|
|
|
- overview: isOverview()
|
|
|
- };
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Restores the presentation to the given state.
|
|
|
- *
|
|
|
- * @param {object} state As generated by getState()
|
|
|
- * @see {@link getState} generates the parameter `state`
|
|
|
- */
|
|
|
- function setState( state ) {
|
|
|
-
|
|
|
- if( typeof state === 'object' ) {
|
|
|
- slide( deserialize( state.indexh ), deserialize( state.indexv ), deserialize( state.indexf ) );
|
|
|
-
|
|
|
- var pausedFlag = deserialize( state.paused ),
|
|
|
- overviewFlag = deserialize( state.overview );
|
|
|
-
|
|
|
- if( typeof pausedFlag === 'boolean' && pausedFlag !== isPaused() ) {
|
|
|
- togglePause( pausedFlag );
|
|
|
- }
|
|
|
-
|
|
|
- if( typeof overviewFlag === 'boolean' && overviewFlag !== isOverview() ) {
|
|
|
- toggleOverview( overviewFlag );
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Return a sorted fragments list, ordered by an increasing
|
|
|
- * "data-fragment-index" attribute.
|
|
|
- *
|
|
|
- * Fragments will be revealed in the order that they are returned by
|
|
|
- * this function, so you can use the index attributes to control the
|
|
|
- * order of fragment appearance.
|
|
|
- *
|
|
|
- * To maintain a sensible default fragment order, fragments are presumed
|
|
|
- * to be passed in document order. This function adds a "fragment-index"
|
|
|
- * attribute to each node if such an attribute is not already present,
|
|
|
- * and sets that attribute to an integer value which is the position of
|
|
|
- * the fragment within the fragments list.
|
|
|
- *
|
|
|
- * @param {object[]|*} fragments
|
|
|
- * @return {object[]} sorted Sorted array of fragments
|
|
|
- */
|
|
|
- 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' );
|
|
|
-
|
|
|
- // Announce the fragments one by one to the Screen Reader
|
|
|
- dom.statusDiv.textContent = getStatusText( element );
|
|
|
-
|
|
|
- if( i === index ) {
|
|
|
- element.classList.add( 'current-fragment' );
|
|
|
- startEmbeddedContent( element );
|
|
|
- }
|
|
|
- }
|
|
|
- // 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();
|
|
|
- updateProgress();
|
|
|
-
|
|
|
- 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 && config.autoSlide !== false ) {
|
|
|
-
|
|
|
- var fragment = currentSlide.querySelector( '.current-fragment' );
|
|
|
-
|
|
|
- // When the slide first appears there is no "current" fragment so
|
|
|
- // we look for a data-autoslide timing on the first fragment
|
|
|
- if( !fragment ) fragment = currentSlide.querySelector( '.fragment' );
|
|
|
-
|
|
|
- var fragmentAutoSlide = fragment ? fragment.getAttribute( 'data-autoslide' ) : null;
|
|
|
- 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 fragment's data-autoslide
|
|
|
- // 2. Current slide's data-autoslide
|
|
|
- // 3. Parent slide's data-autoslide
|
|
|
- // 4. Global autoSlide setting
|
|
|
- if( fragmentAutoSlide ) {
|
|
|
- autoSlide = parseInt( fragmentAutoSlide, 10 );
|
|
|
- }
|
|
|
- else if( slideAutoSlide ) {
|
|
|
- autoSlide = parseInt( slideAutoSlide, 10 );
|
|
|
- }
|
|
|
- else if( parentAutoSlide ) {
|
|
|
- autoSlide = parseInt( parentAutoSlide, 10 );
|
|
|
- }
|
|
|
- else {
|
|
|
- autoSlide = config.autoSlide;
|
|
|
- }
|
|
|
-
|
|
|
- // If there are media elements with data-autoplay,
|
|
|
- // automatically set the autoSlide duration to the
|
|
|
- // length of that media. Not applicable if the slide
|
|
|
- // is divided up into fragments.
|
|
|
- // playbackRate is accounted for in the duration.
|
|
|
- if( currentSlide.querySelectorAll( '.fragment' ).length === 0 ) {
|
|
|
- toArray( currentSlide.querySelectorAll( 'video, audio' ) ).forEach( function( el ) {
|
|
|
- if( el.hasAttribute( 'data-autoplay' ) ) {
|
|
|
- if( autoSlide && (el.duration * 1000 / el.playbackRate ) > autoSlide ) {
|
|
|
- autoSlide = ( el.duration * 1000 / el.playbackRate ) + 1000;
|
|
|
- }
|
|
|
- }
|
|
|
- } );
|
|
|
- }
|
|
|
-
|
|
|
- // Cue the next auto-slide if:
|
|
|
- // - There is an autoSlide value
|
|
|
- // - Auto-sliding isn't paused by the user
|
|
|
- // - The presentation isn't paused
|
|
|
- // - The overview isn't active
|
|
|
- // - The presentation isn't over
|
|
|
- if( autoSlide && !autoSlidePaused && !isPaused() && !isOverview() && ( !Reveal.isLastSlide() || availableFragments().next || config.loop === true ) ) {
|
|
|
- autoSlideTimeout = setTimeout( function() {
|
|
|
- typeof config.autoSlideMethod === 'function' ? config.autoSlideMethod() : navigateNext();
|
|
|
- cueAutoSlide();
|
|
|
- }, autoSlide );
|
|
|
- autoSlideStartTime = Date.now();
|
|
|
- }
|
|
|
-
|
|
|
- if( autoSlidePlayer ) {
|
|
|
- autoSlidePlayer.setPlaying( autoSlideTimeout !== -1 );
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Cancels any ongoing request to auto-slide.
|
|
|
- */
|
|
|
- function cancelAutoSlide() {
|
|
|
-
|
|
|
- clearTimeout( autoSlideTimeout );
|
|
|
- autoSlideTimeout = -1;
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- function pauseAutoSlide() {
|
|
|
-
|
|
|
- if( autoSlide && !autoSlidePaused ) {
|
|
|
- autoSlidePaused = true;
|
|
|
- dispatchEvent( 'autoslidepaused' );
|
|
|
- clearTimeout( autoSlideTimeout );
|
|
|
-
|
|
|
- if( autoSlidePlayer ) {
|
|
|
- autoSlidePlayer.setPlaying( false );
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- function resumeAutoSlide() {
|
|
|
-
|
|
|
- if( autoSlide && autoSlidePaused ) {
|
|
|
- autoSlidePaused = false;
|
|
|
- dispatchEvent( 'autoslideresumed' );
|
|
|
- cueAutoSlide();
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- function navigateLeft() {
|
|
|
-
|
|
|
- // 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() {
|
|
|
-
|
|
|
- hasNavigatedRight = true;
|
|
|
-
|
|
|
- // 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() {
|
|
|
-
|
|
|
- hasNavigatedDown = true;
|
|
|
-
|
|
|
- // Prioritize revealing fragments
|
|
|
- if( ( isOverview() || nextFragment() === false ) && availableRoutes().down ) {
|
|
|
- slide( indexh, indexv + 1 );
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Navigates backwards, prioritized in the following order:
|
|
|
- * 1) Previous fragment
|
|
|
- * 2) Previous vertical slide
|
|
|
- * 3) Previous horizontal slide
|
|
|
- */
|
|
|
- function navigatePrev() {
|
|
|
-
|
|
|
- // Prioritize revealing fragments
|
|
|
- if( previousFragment() === false ) {
|
|
|
- if( availableRoutes().up ) {
|
|
|
- navigateUp();
|
|
|
- }
|
|
|
- else {
|
|
|
- // Fetch the previous horizontal slide, if there is one
|
|
|
- var previousSlide;
|
|
|
-
|
|
|
- if( config.rtl ) {
|
|
|
- previousSlide = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR + '.future' ) ).pop();
|
|
|
- }
|
|
|
- else {
|
|
|
- previousSlide = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR + '.past' ) ).pop();
|
|
|
- }
|
|
|
-
|
|
|
- if( previousSlide ) {
|
|
|
- var v = ( previousSlide.querySelectorAll( 'section' ).length - 1 ) || undefined;
|
|
|
- var h = indexh - 1;
|
|
|
- slide( h, v );
|
|
|
- }
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * The reverse of #navigatePrev().
|
|
|
- */
|
|
|
- function navigateNext() {
|
|
|
-
|
|
|
- hasNavigatedRight = true;
|
|
|
- hasNavigatedDown = true;
|
|
|
-
|
|
|
- // Prioritize revealing fragments
|
|
|
- if( nextFragment() === false ) {
|
|
|
- if( availableRoutes().down ) {
|
|
|
- navigateDown();
|
|
|
- }
|
|
|
- else if( config.rtl ) {
|
|
|
- navigateLeft();
|
|
|
- }
|
|
|
- else {
|
|
|
- navigateRight();
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Checks if the target element prevents the triggering of
|
|
|
- * swipe navigation.
|
|
|
- */
|
|
|
- function isSwipePrevented( target ) {
|
|
|
-
|
|
|
- while( target && typeof target.hasAttribute === 'function' ) {
|
|
|
- if( target.hasAttribute( 'data-prevent-swipe' ) ) return true;
|
|
|
- target = target.parentNode;
|
|
|
- }
|
|
|
-
|
|
|
- return false;
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
-
|
|
|
- // --------------------------------------------------------------------//
|
|
|
- // ----------------------------- EVENTS -------------------------------//
|
|
|
- // --------------------------------------------------------------------//
|
|
|
-
|
|
|
- /**
|
|
|
- * Called by all event handlers that are based on user
|
|
|
- * input.
|
|
|
- *
|
|
|
- * @param {object} [event]
|
|
|
- */
|
|
|
- function onUserInput( event ) {
|
|
|
-
|
|
|
- if( config.autoSlideStoppable ) {
|
|
|
- pauseAutoSlide();
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Handler for the document level 'keypress' event.
|
|
|
- *
|
|
|
- * @param {object} event
|
|
|
- */
|
|
|
- function onDocumentKeyPress( event ) {
|
|
|
-
|
|
|
- // Check if the pressed key is question mark
|
|
|
- if( event.shiftKey && event.charCode === 63 ) {
|
|
|
- toggleHelp();
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Handler for the document level 'keydown' event.
|
|
|
- *
|
|
|
- * @param {object} event
|
|
|
- */
|
|
|
- function onDocumentKeyDown( event ) {
|
|
|
-
|
|
|
- // If there's a condition specified and it returns false,
|
|
|
- // ignore this event
|
|
|
- if( typeof config.keyboardCondition === 'function' && config.keyboardCondition() === false ) {
|
|
|
- return true;
|
|
|
- }
|
|
|
-
|
|
|
- // Remember if auto-sliding was paused so we can toggle it
|
|
|
- var autoSlideWasPaused = autoSlidePaused;
|
|
|
-
|
|
|
- onUserInput( event );
|
|
|
-
|
|
|
- // Check if there's a focused element that could be using
|
|
|
- // the keyboard
|
|
|
- var activeElementIsCE = document.activeElement && document.activeElement.contentEditable !== 'inherit';
|
|
|
- var activeElementIsInput = document.activeElement && document.activeElement.tagName && /input|textarea/i.test( document.activeElement.tagName );
|
|
|
- var activeElementIsNotes = document.activeElement && document.activeElement.className && /speaker-notes/i.test( document.activeElement.className);
|
|
|
-
|
|
|
- // Disregard the event if there's a focused element or a
|
|
|
- // keyboard modifier key is present
|
|
|
- if( activeElementIsCE || activeElementIsInput || activeElementIsNotes || (event.shiftKey && event.keyCode !== 32) || event.altKey || event.ctrlKey || event.metaKey ) return;
|
|
|
-
|
|
|
- // While paused only allow resume keyboard events; 'b', 'v', '.'
|
|
|
- var resumeKeyCodes = [66,86,190,191];
|
|
|
- var key;
|
|
|
-
|
|
|
- // Custom key bindings for togglePause should be able to resume
|
|
|
- if( typeof config.keyboard === 'object' ) {
|
|
|
- for( key in config.keyboard ) {
|
|
|
- if( config.keyboard[key] === 'togglePause' ) {
|
|
|
- resumeKeyCodes.push( parseInt( key, 10 ) );
|
|
|
- }
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- if( isPaused() && resumeKeyCodes.indexOf( event.keyCode ) === -1 ) {
|
|
|
- return false;
|
|
|
- }
|
|
|
-
|
|
|
- var triggered = false;
|
|
|
-
|
|
|
- // 1. User defined key bindings
|
|
|
- if( typeof config.keyboard === 'object' ) {
|
|
|
-
|
|
|
- for( key in config.keyboard ) {
|
|
|
-
|
|
|
- // Check if this binding matches the pressed key
|
|
|
- if( parseInt( key, 10 ) === 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;
|
|
|
- // two-spot, semicolon, b, v, period, Logitech presenter tools "black screen" button
|
|
|
- case 58: case 59: case 66: case 86: case 190: case 191: togglePause(); break;
|
|
|
- // f
|
|
|
- case 70: enterFullscreen(); break;
|
|
|
- // a
|
|
|
- case 65: if ( config.autoSlideStoppable ) toggleAutoSlide( autoSlideWasPaused ); break;
|
|
|
- default:
|
|
|
- triggered = false;
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- // If the input resulted in a triggered action we should prevent
|
|
|
- // the browsers default behavior
|
|
|
- if( triggered ) {
|
|
|
- event.preventDefault && event.preventDefault();
|
|
|
- }
|
|
|
- // ESC or O key
|
|
|
- else if ( ( event.keyCode === 27 || event.keyCode === 79 ) && features.transforms3d ) {
|
|
|
- if( dom.overlay ) {
|
|
|
- closeOverlay();
|
|
|
- }
|
|
|
- else {
|
|
|
- toggleOverview();
|
|
|
- }
|
|
|
-
|
|
|
- event.preventDefault && event.preventDefault();
|
|
|
- }
|
|
|
-
|
|
|
- // If auto-sliding is enabled we need to cue up
|
|
|
- // another timeout
|
|
|
- cueAutoSlide();
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Handler for the 'touchstart' event, enables support for
|
|
|
- * swipe and pinch gestures.
|
|
|
- *
|
|
|
- * @param {object} event
|
|
|
- */
|
|
|
- function onTouchStart( event ) {
|
|
|
-
|
|
|
- if( isSwipePrevented( event.target ) ) return true;
|
|
|
-
|
|
|
- touch.startX = event.touches[0].clientX;
|
|
|
- touch.startY = event.touches[0].clientY;
|
|
|
- touch.startCount = event.touches.length;
|
|
|
-
|
|
|
- // 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.
|
|
|
- *
|
|
|
- * @param {object} event
|
|
|
- */
|
|
|
- function onTouchMove( event ) {
|
|
|
-
|
|
|
- if( isSwipePrevented( event.target ) ) return true;
|
|
|
-
|
|
|
- // 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( UA.match( /android/gi ) ) {
|
|
|
- event.preventDefault();
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Handler for the 'touchend' event.
|
|
|
- *
|
|
|
- * @param {object} event
|
|
|
- */
|
|
|
- function onTouchEnd( event ) {
|
|
|
-
|
|
|
- touch.captured = false;
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Convert pointer down to touch start.
|
|
|
- *
|
|
|
- * @param {object} event
|
|
|
- */
|
|
|
- function onPointerDown( event ) {
|
|
|
-
|
|
|
- if( event.pointerType === event.MSPOINTER_TYPE_TOUCH || event.pointerType === "touch" ) {
|
|
|
- event.touches = [{ clientX: event.clientX, clientY: event.clientY }];
|
|
|
- onTouchStart( event );
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Convert pointer move to touch move.
|
|
|
- *
|
|
|
- * @param {object} event
|
|
|
- */
|
|
|
- function onPointerMove( event ) {
|
|
|
-
|
|
|
- if( event.pointerType === event.MSPOINTER_TYPE_TOUCH || event.pointerType === "touch" ) {
|
|
|
- event.touches = [{ clientX: event.clientX, clientY: event.clientY }];
|
|
|
- onTouchMove( event );
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Convert pointer up to touch end.
|
|
|
- *
|
|
|
- * @param {object} event
|
|
|
- */
|
|
|
- function onPointerUp( event ) {
|
|
|
-
|
|
|
- if( event.pointerType === event.MSPOINTER_TYPE_TOUCH || event.pointerType === "touch" ) {
|
|
|
- event.touches = [{ clientX: event.clientX, clientY: event.clientY }];
|
|
|
- onTouchEnd( event );
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Handles mouse wheel scrolling, throttled to avoid skipping
|
|
|
- * multiple slides.
|
|
|
- *
|
|
|
- * @param {object} event
|
|
|
- */
|
|
|
- function onDocumentMouseScroll( event ) {
|
|
|
-
|
|
|
- if( Date.now() - lastMouseWheelStep > 600 ) {
|
|
|
-
|
|
|
- lastMouseWheelStep = Date.now();
|
|
|
-
|
|
|
- var delta = event.detail || -event.wheelDelta;
|
|
|
- if( delta > 0 ) {
|
|
|
- navigateNext();
|
|
|
- }
|
|
|
- else if( delta < 0 ) {
|
|
|
- navigatePrev();
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Clicking on the progress bar results in a navigation to the
|
|
|
- * closest approximate horizontal slide using this equation:
|
|
|
- *
|
|
|
- * ( clickX / presentationWidth ) * numberOfSlides
|
|
|
- *
|
|
|
- * @param {object} event
|
|
|
- */
|
|
|
- function onProgressClicked( event ) {
|
|
|
-
|
|
|
- onUserInput( event );
|
|
|
-
|
|
|
- event.preventDefault();
|
|
|
-
|
|
|
- var slidesTotal = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ).length;
|
|
|
- var slideIndex = Math.floor( ( event.clientX / dom.wrapper.offsetWidth ) * slidesTotal );
|
|
|
-
|
|
|
- if( config.rtl ) {
|
|
|
- slideIndex = slidesTotal - slideIndex;
|
|
|
- }
|
|
|
-
|
|
|
- slide( slideIndex );
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Event handler for navigation control buttons.
|
|
|
- */
|
|
|
- function onNavigateLeftClicked( event ) { event.preventDefault(); onUserInput(); 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.
|
|
|
- *
|
|
|
- * @param {object} [event]
|
|
|
- */
|
|
|
- function onWindowHashChange( event ) {
|
|
|
-
|
|
|
- readURL();
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Handler for the window level 'resize' event.
|
|
|
- *
|
|
|
- * @param {object} [event]
|
|
|
- */
|
|
|
- function onWindowResize( event ) {
|
|
|
-
|
|
|
- layout();
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Handle for the window level 'visibilitychange' event.
|
|
|
- *
|
|
|
- * @param {object} [event]
|
|
|
- */
|
|
|
- function onPageVisibilityChange( event ) {
|
|
|
-
|
|
|
- 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 ) {
|
|
|
- // Not all elements support .blur() - SVGs among them.
|
|
|
- if( typeof document.activeElement.blur === 'function' ) {
|
|
|
- document.activeElement.blur();
|
|
|
- }
|
|
|
- document.body.focus();
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Invoked when a slide is and we're in the overview.
|
|
|
- *
|
|
|
- * @param {object} event
|
|
|
- */
|
|
|
- function onOverviewSlideClicked( event ) {
|
|
|
-
|
|
|
- // TODO There's a bug here where the event listeners are not
|
|
|
- // removed after deactivating the overview.
|
|
|
- if( eventsAreBound && isOverview() ) {
|
|
|
- event.preventDefault();
|
|
|
-
|
|
|
- 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.
|
|
|
- *
|
|
|
- * @param {object} event
|
|
|
- */
|
|
|
- function onPreviewLinkClicked( event ) {
|
|
|
-
|
|
|
- if( event.currentTarget && event.currentTarget.hasAttribute( 'href' ) ) {
|
|
|
- var url = event.currentTarget.getAttribute( 'href' );
|
|
|
- if( url ) {
|
|
|
- showPreview( url );
|
|
|
- event.preventDefault();
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Handles click on the auto-sliding controls element.
|
|
|
- *
|
|
|
- * @param {object} [event]
|
|
|
- */
|
|
|
- function onAutoSlidePlayerClick( event ) {
|
|
|
-
|
|
|
- // Replay
|
|
|
- if( Reveal.isLastSlide() && config.loop === false ) {
|
|
|
- slide( 0, 0 );
|
|
|
- resumeAutoSlide();
|
|
|
- }
|
|
|
- // Resume
|
|
|
- else if( autoSlidePaused ) {
|
|
|
- resumeAutoSlide();
|
|
|
- }
|
|
|
- // Pause
|
|
|
- else {
|
|
|
- pauseAutoSlide();
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
-
|
|
|
- // --------------------------------------------------------------------//
|
|
|
- // ------------------------ 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 = 100;
|
|
|
- this.diameter2 = this.diameter/2;
|
|
|
- this.thickness = 6;
|
|
|
-
|
|
|
- // 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.canvas.style.width = this.diameter2 + 'px';
|
|
|
- this.canvas.style.height = this.diameter2 + 'px';
|
|
|
- this.context = this.canvas.getContext( '2d' );
|
|
|
-
|
|
|
- this.container.appendChild( this.canvas );
|
|
|
-
|
|
|
- this.render();
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * @param value
|
|
|
- */
|
|
|
- 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.diameter2 ) - this.thickness,
|
|
|
- x = this.diameter2,
|
|
|
- y = this.diameter2,
|
|
|
- iconSize = 28;
|
|
|
-
|
|
|
- // 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 + 4, 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 = 'rgba( 255, 255, 255, 0.2 )';
|
|
|
- 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 - 4, iconSize );
|
|
|
- this.context.fillRect( iconSize / 2 + 4, 0, iconSize / 2 - 4, iconSize );
|
|
|
- }
|
|
|
- else {
|
|
|
- this.context.beginPath();
|
|
|
- this.context.translate( 4, 0 );
|
|
|
- this.context.moveTo( 0, 0 );
|
|
|
- this.context.lineTo( iconSize - 4, 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 --------------------------------//
|
|
|
- // --------------------------------------------------------------------//
|
|
|
-
|
|
|
-
|
|
|
- Reveal = {
|
|
|
- VERSION: VERSION,
|
|
|
-
|
|
|
- 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,
|
|
|
-
|
|
|
- // Randomizes the order of slides
|
|
|
- shuffle: shuffle,
|
|
|
-
|
|
|
- // 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 a help overlay with keyboard shortcuts
|
|
|
- toggleHelp: toggleHelp,
|
|
|
-
|
|
|
- // Toggles the overview mode on/off
|
|
|
- toggleOverview: toggleOverview,
|
|
|
-
|
|
|
- // Toggles the "black screen" mode on/off
|
|
|
- togglePause: togglePause,
|
|
|
-
|
|
|
- // Toggles the auto slide mode on/off
|
|
|
- toggleAutoSlide: toggleAutoSlide,
|
|
|
-
|
|
|
- // State checks
|
|
|
- isOverview: isOverview,
|
|
|
- isPaused: isPaused,
|
|
|
- isAutoSliding: isAutoSliding,
|
|
|
- isSpeakerNotes: isSpeakerNotes,
|
|
|
-
|
|
|
- // Slide preloading
|
|
|
- loadSlide: loadSlide,
|
|
|
- unloadSlide: unloadSlide,
|
|
|
-
|
|
|
- // Adds or removes all internal event listeners (such as keyboard)
|
|
|
- addEventListeners: addEventListeners,
|
|
|
- removeEventListeners: removeEventListeners,
|
|
|
-
|
|
|
- // Facility for persisting and restoring the presentation state
|
|
|
- getState: getState,
|
|
|
- setState: setState,
|
|
|
-
|
|
|
- // Presentation progress
|
|
|
- getSlidePastCount: getSlidePastCount,
|
|
|
-
|
|
|
- // Presentation progress on range of 0-1
|
|
|
- getProgress: getProgress,
|
|
|
-
|
|
|
- // Returns the indices of the current, or specified, slide
|
|
|
- getIndices: getIndices,
|
|
|
-
|
|
|
- // Returns an Array of all slides
|
|
|
- getSlides: getSlides,
|
|
|
-
|
|
|
- // Returns the total number of slides
|
|
|
- getTotalSlides: getTotalSlides,
|
|
|
-
|
|
|
- // Returns the slide element at the specified index
|
|
|
- getSlide: getSlide,
|
|
|
-
|
|
|
- // Returns the slide background element at the specified index
|
|
|
- getSlideBackground: getSlideBackground,
|
|
|
-
|
|
|
- // Returns the speaker notes string for a slide, or null
|
|
|
- getSlideNotes: getSlideNotes,
|
|
|
-
|
|
|
- // 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 ] = deserialize( unescape( value ) );
|
|
|
- }
|
|
|
-
|
|
|
- return query;
|
|
|
- },
|
|
|
-
|
|
|
- // Returns true if we're currently on the first slide
|
|
|
- isFirstSlide: function() {
|
|
|
- return ( indexh === 0 && indexv === 0 );
|
|
|
- },
|
|
|
-
|
|
|
- // 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 );
|
|
|
- }
|
|
|
- },
|
|
|
-
|
|
|
- // Programatically triggers a keyboard event
|
|
|
- triggerKey: function( keyCode ) {
|
|
|
- onDocumentKeyDown( { keyCode: keyCode } );
|
|
|
- },
|
|
|
-
|
|
|
- // Registers a new shortcut to include in the help overlay
|
|
|
- registerKeyboardShortcut: function( key, value ) {
|
|
|
- keyboardShortcuts[key] = value;
|
|
|
- }
|
|
|
- };
|
|
|
-
|
|
|
- return Reveal;
|
|
|
-
|
|
|
-}));
|