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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) 2019 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 = '3.8.0';
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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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+ // - true: Show slide number
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+ // - false: Hide slide number
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+ //
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+ // Can optionally be set as a string that specifies the number formatting:
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+ // - "h.v": Horizontal . vertical slide number (default)
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+ // - "h/v": Horizontal / vertical slide number
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+ // - "c": Flattened slide number
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+ // - "c/t": Flattened slide number / total slides
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+ //
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+ // Alternatively, you can provide a function that returns the slide
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+ // number for the current slide. The function needs to return an array
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+ // with one string [slideNumber] or three strings [n1,delimiter,n2].
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+ // See #formatSlideNumber().
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+ slideNumber: false,
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+
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+ // Can be used to limit the contexts in which the slide number appears
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+ // - "all": Always show the slide number
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+ // - "print": Only when printing to PDF
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+ // - "speaker": Only in the speaker view
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+ showSlideNumber: 'all',
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+
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+ // Use 1 based indexing for # links to match slide number (default is zero
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+ // based)
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+ hashOneBasedIndex: false,
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+
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+ // Add the current slide number to the URL hash so that reloading the
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+ // page/copying the URL will return you to the same slide
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+ hash: false,
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+
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+ // Push each slide change to the browser history. Implies `hash: true`
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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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+ // Disables the default reveal.js slide layout so that you can use
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+ // custom CSS layout
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+ disableLayout: false,
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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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+ // Changes the behavior of our navigation directions.
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+ //
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+ // "default"
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+ // Left/right arrow keys step between horizontal slides, up/down
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+ // arrow keys step between vertical slides. Space key steps through
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+ // all slides (both horizontal and vertical).
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+ //
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+ // "linear"
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+ // Removes the up/down arrows. Left/right arrows step through all
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+ // slides (both horizontal and vertical).
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+ //
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+ // "grid"
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+ // When this is enabled, stepping left/right from a vertical stack
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+ // to an adjacent vertical stack will land you at the same vertical
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+ // index.
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+ //
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+ // Consider a deck with six slides ordered in two vertical stacks:
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+ // 1.1 2.1
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+ // 1.2 2.2
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+ // 1.3 2.3
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+ //
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+ // If you're on slide 1.3 and navigate right, you will normally move
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+ // from 1.3 -> 2.1. If "grid" is used, the same navigation takes you
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+ // from 1.3 -> 2.3.
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+ navigationMode: 'default',
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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 whether to include the current fragment in the URL,
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+ // so that reloading brings you to the same fragment position
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+ fragmentInURL: false,
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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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+ // Global override for preloading lazy-loaded iframes
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+ // - null: Iframes with data-src AND data-preload will be loaded when within
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+ // the viewDistance, iframes with only data-src will be loaded when visible
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+ // - true: All iframes with data-src will be loaded when within the viewDistance
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+ // - false: All iframes with data-src will be loaded only when visible
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+ preloadIframes: 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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+ // Specify the average time in seconds that you think you will spend
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+ // presenting each slide. This is used to show a pacing timer in the
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+ // speaker view
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+ defaultTiming: 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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+ // Parallax background repeat
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+ parallaxBackgroundRepeat: '', // repeat/repeat-x/repeat-y/no-repeat/initial/inherit
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+
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+ // Parallax background position
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+ parallaxBackgroundPosition: '', // CSS syntax, e.g. "top left"
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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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+ // Prints each fragment on a separate slide
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+ pdfSeparateFragments: true,
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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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+ // Hide cursor if inactive
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+ hideInactiveCursor: true,
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+
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+ // Time before the cursor is hidden (in ms)
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+ hideCursorTime: 5000,
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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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+ // A list of registered reveal.js plugins
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+ plugins = {},
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+
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+ // List of asynchronously loaded reveal.js dependencies
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+ asyncDependencies = [],
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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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+ // Is the mouse pointer currently hidden from view
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+ cursorHidden = false,
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+
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+ // Timeout used to determine when the cursor is inactive
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+ cursorInactiveTimeout = 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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+ 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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+ // A key:value map of shortcut keyboard keys and descriptions of
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+ // the actions they trigger, generated in #configure()
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+ keyboardShortcuts = {},
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+
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+ // Holds custom key code mappings
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+ registeredKeyBindings = {};
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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 );
|
|
|
+
|
|
|
+ // Hide the address bar in mobile browsers
|
|
|
+ hideAddressBar();
|
|
|
+
|
|
|
+ // Loads dependencies and continues to #start() once done
|
|
|
+ load();
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Inspect the client to see what it's capable of, this
|
|
|
+ * should only happens once per runtime.
|
|
|
+ */
|
|
|
+ function checkCapabilities() {
|
|
|
+
|
|
|
+ isMobileDevice = /(iphone|ipod|ipad|android)/gi.test( UA );
|
|
|
+ isChrome = /chrome/i.test( UA ) && !/edge/i.test( UA );
|
|
|
+
|
|
|
+ var testElement = document.createElement( 'div' );
|
|
|
+
|
|
|
+ features.transforms3d = 'WebkitPerspective' in testElement.style ||
|
|
|
+ 'MozPerspective' in testElement.style ||
|
|
|
+ 'msPerspective' in testElement.style ||
|
|
|
+ 'OPerspective' in testElement.style ||
|
|
|
+ 'perspective' in testElement.style;
|
|
|
+
|
|
|
+ features.transforms2d = 'WebkitTransform' in testElement.style ||
|
|
|
+ 'MozTransform' in testElement.style ||
|
|
|
+ 'msTransform' in testElement.style ||
|
|
|
+ 'OTransform' in testElement.style ||
|
|
|
+ 'transform' in testElement.style;
|
|
|
+
|
|
|
+ features.requestAnimationFrameMethod = window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame;
|
|
|
+ features.requestAnimationFrame = typeof features.requestAnimationFrameMethod === 'function';
|
|
|
+
|
|
|
+ features.canvas = !!document.createElement( 'canvas' ).getContext;
|
|
|
+
|
|
|
+ // Transitions in the overview are disabled in desktop and
|
|
|
+ // Safari due to lag
|
|
|
+ features.overviewTransitions = !/Version\/[\d\.]+.*Safari/.test( UA );
|
|
|
+
|
|
|
+ // Flags if we should use zoom instead of transform to scale
|
|
|
+ // up slides. Zoom produces crisper results but has a lot of
|
|
|
+ // xbrowser quirks so we only use it in whitelsited browsers.
|
|
|
+ features.zoom = 'zoom' in testElement.style && !isMobileDevice &&
|
|
|
+ ( isChrome || /Version\/[\d\.]+.*Safari/.test( UA ) );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Loads the dependencies of reveal.js. Dependencies are
|
|
|
+ * defined via the configuration option 'dependencies'
|
|
|
+ * and will be loaded prior to starting/binding reveal.js.
|
|
|
+ * Some dependencies may have an 'async' flag, if so they
|
|
|
+ * will load after reveal.js has been started up.
|
|
|
+ */
|
|
|
+ function load() {
|
|
|
+
|
|
|
+ var scripts = [],
|
|
|
+ scriptsToLoad = 0;
|
|
|
+
|
|
|
+ config.dependencies.forEach( function( s ) {
|
|
|
+ // Load if there's no condition or the condition is truthy
|
|
|
+ if( !s.condition || s.condition() ) {
|
|
|
+ if( s.async ) {
|
|
|
+ asyncDependencies.push( s );
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ scripts.push( s );
|
|
|
+ }
|
|
|
+ }
|
|
|
+ } );
|
|
|
+
|
|
|
+ if( scripts.length ) {
|
|
|
+ scriptsToLoad = scripts.length;
|
|
|
+
|
|
|
+ // Load synchronous scripts
|
|
|
+ scripts.forEach( function( s ) {
|
|
|
+ loadScript( s.src, function() {
|
|
|
+
|
|
|
+ if( typeof s.callback === 'function' ) s.callback();
|
|
|
+
|
|
|
+ if( --scriptsToLoad === 0 ) {
|
|
|
+ initPlugins();
|
|
|
+ }
|
|
|
+
|
|
|
+ } );
|
|
|
+ } );
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ initPlugins();
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Initializes our plugins and waits for them to be ready
|
|
|
+ * before proceeding.
|
|
|
+ */
|
|
|
+ function initPlugins() {
|
|
|
+
|
|
|
+ var pluginsToInitialize = Object.keys( plugins ).length;
|
|
|
+
|
|
|
+ // If there are no plugins, skip this step
|
|
|
+ if( pluginsToInitialize === 0 ) {
|
|
|
+ loadAsyncDependencies();
|
|
|
+ }
|
|
|
+ // ... otherwise initialize plugins
|
|
|
+ else {
|
|
|
+
|
|
|
+ var afterPlugInitialized = function() {
|
|
|
+ if( --pluginsToInitialize === 0 ) {
|
|
|
+ loadAsyncDependencies();
|
|
|
+ }
|
|
|
+ };
|
|
|
+
|
|
|
+ for( var i in plugins ) {
|
|
|
+
|
|
|
+ var plugin = plugins[i];
|
|
|
+
|
|
|
+ // If the plugin has an 'init' method, invoke it
|
|
|
+ if( typeof plugin.init === 'function' ) {
|
|
|
+ var callback = plugin.init();
|
|
|
+
|
|
|
+ // If the plugin returned a Promise, wait for it
|
|
|
+ if( callback && typeof callback.then === 'function' ) {
|
|
|
+ callback.then( afterPlugInitialized );
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ afterPlugInitialized();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ afterPlugInitialized();
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Loads all async reveal.js dependencies.
|
|
|
+ */
|
|
|
+ function loadAsyncDependencies() {
|
|
|
+
|
|
|
+ if( asyncDependencies.length ) {
|
|
|
+ asyncDependencies.forEach( function( s ) {
|
|
|
+ loadScript( s.src, s.callback );
|
|
|
+ } );
|
|
|
+ }
|
|
|
+
|
|
|
+ start();
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Loads a JavaScript file from the given URL and executes it.
|
|
|
+ *
|
|
|
+ * @param {string} url Address of the .js file to load
|
|
|
+ * @param {function} callback Method to invoke when the script
|
|
|
+ * has loaded and executed
|
|
|
+ */
|
|
|
+ function loadScript( url, callback ) {
|
|
|
+
|
|
|
+ var script = document.createElement( 'script' );
|
|
|
+ script.type = 'text/javascript';
|
|
|
+ script.async = false;
|
|
|
+ script.defer = false;
|
|
|
+ script.src = url;
|
|
|
+
|
|
|
+ if( callback ) {
|
|
|
+
|
|
|
+ // Success callback
|
|
|
+ script.onload = script.onreadystatechange = function( event ) {
|
|
|
+ if( event.type === "load" || (/loaded|complete/.test( script.readyState ) ) ) {
|
|
|
+
|
|
|
+ // Kill event listeners
|
|
|
+ script.onload = script.onreadystatechange = script.onerror = null;
|
|
|
+
|
|
|
+ callback();
|
|
|
+
|
|
|
+ }
|
|
|
+ };
|
|
|
+
|
|
|
+ // Error callback
|
|
|
+ script.onerror = function( err ) {
|
|
|
+
|
|
|
+ // Kill event listeners
|
|
|
+ script.onload = script.onreadystatechange = script.onerror = null;
|
|
|
+
|
|
|
+ callback( new Error( 'Failed loading script: ' + script.src + '\n' + err) );
|
|
|
+
|
|
|
+ };
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ // Append the script at the end of <head>
|
|
|
+ var head = document.querySelector( 'head' );
|
|
|
+ head.insertBefore( script, head.lastChild );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 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
|
|
|
+ dom.pauseOverlay = createSingletonNode( dom.wrapper, 'div', 'pause-overlay', config.controls ? '<button class="resume-button">Resume presentation</button>' : null );
|
|
|
+
|
|
|
+ dom.wrapper.setAttribute( 'role', 'application' );
|
|
|
+
|
|
|
+ // There can be multiple instances of controls throughout the page
|
|
|
+ dom.controlsLeft = toArray( 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 );
|
|
|
+ }
|
|
|
+
|
|
|
+ // Copy page and show fragments one after another
|
|
|
+ if( config.pdfSeparateFragments ) {
|
|
|
+
|
|
|
+ // Each fragment 'group' is an array containing one or more
|
|
|
+ // fragments. Multiple fragments that appear at the same time
|
|
|
+ // are part of the same group.
|
|
|
+ var fragmentGroups = sortFragments( page.querySelectorAll( '.fragment' ), true );
|
|
|
+
|
|
|
+ var previousFragmentStep;
|
|
|
+ var previousPage;
|
|
|
+
|
|
|
+ fragmentGroups.forEach( function( fragments ) {
|
|
|
+
|
|
|
+ // Remove 'current-fragment' from the previous group
|
|
|
+ if( previousFragmentStep ) {
|
|
|
+ previousFragmentStep.forEach( function( fragment ) {
|
|
|
+ fragment.classList.remove( 'current-fragment' );
|
|
|
+ } );
|
|
|
+ }
|
|
|
+
|
|
|
+ // Show the fragments for the current index
|
|
|
+ fragments.forEach( function( fragment ) {
|
|
|
+ fragment.classList.add( 'visible', 'current-fragment' );
|
|
|
+ } );
|
|
|
+
|
|
|
+ // Create a separate page for the current fragment state
|
|
|
+ var clonedPage = page.cloneNode( true );
|
|
|
+ page.parentNode.insertBefore( clonedPage, ( previousPage || page ).nextSibling );
|
|
|
+
|
|
|
+ previousFragmentStep = fragments;
|
|
|
+ previousPage = clonedPage;
|
|
|
+
|
|
|
+ } );
|
|
|
+
|
|
|
+ // Reset the first/original page so that all fragments are hidden
|
|
|
+ fragmentGroups.forEach( function( fragments ) {
|
|
|
+ fragments.forEach( function( fragment ) {
|
|
|
+ fragment.classList.remove( 'visible', 'current-fragment' );
|
|
|
+ } );
|
|
|
+ } );
|
|
|
+
|
|
|
+ }
|
|
|
+ // Show all fragments
|
|
|
+ else {
|
|
|
+ toArray( page.querySelectorAll( '.fragment:not(.fade-out)' ) ).forEach( function( fragment ) {
|
|
|
+ fragment.classList.add( 'visible' );
|
|
|
+ } );
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ } );
|
|
|
+
|
|
|
+ // Notify subscribers that the PDF layout is good to go
|
|
|
+ dispatchEvent( 'pdf-ready' );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * This is an unfortunate necessity. Some actions – such as
|
|
|
+ * an input field being focused in an iframe or using the
|
|
|
+ * keyboard to expand text selection beyond the bounds of
|
|
|
+ * a slide – can trigger our content to be pushed out of view.
|
|
|
+ * This scrolling can not be prevented by hiding overflow in
|
|
|
+ * CSS (we already do) so we have to resort to repeatedly
|
|
|
+ * checking if the slides have been offset :(
|
|
|
+ */
|
|
|
+ function setupScrollPrevention() {
|
|
|
+
|
|
|
+ setInterval( 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;
|
|
|
+ dom.background.style.backgroundRepeat = config.parallaxBackgroundRepeat;
|
|
|
+ dom.background.style.backgroundPosition = config.parallaxBackgroundPosition;
|
|
|
+
|
|
|
+ // Make sure the below properties are set on the element - these properties are
|
|
|
+ // needed for proper transitions to be set on the element via CSS. To remove
|
|
|
+ // annoying background slide-in effect when the presentation starts, apply
|
|
|
+ // these properties after short time delay
|
|
|
+ setTimeout( 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 ) {
|
|
|
+
|
|
|
+
|
|
|
+ // Main slide background element
|
|
|
+ var element = document.createElement( 'div' );
|
|
|
+ element.className = 'slide-background ' + slide.className.replace( /present|past|future/, '' );
|
|
|
+
|
|
|
+ // Inner background element that wraps images/videos/iframes
|
|
|
+ var contentElement = document.createElement( 'div' );
|
|
|
+ contentElement.className = 'slide-background-content';
|
|
|
+
|
|
|
+ element.appendChild( contentElement );
|
|
|
+ container.appendChild( element );
|
|
|
+
|
|
|
+ slide.slideBackgroundElement = element;
|
|
|
+ slide.slideBackgroundContentElement = contentElement;
|
|
|
+
|
|
|
+ // Syncs the background to reflect all current background settings
|
|
|
+ syncBackground( slide );
|
|
|
+
|
|
|
+ return element;
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Renders all of the visual properties of a slide background
|
|
|
+ * based on the various background attributes.
|
|
|
+ *
|
|
|
+ * @param {HTMLElement} slide
|
|
|
+ */
|
|
|
+ function syncBackground( slide ) {
|
|
|
+
|
|
|
+ var element = slide.slideBackgroundElement,
|
|
|
+ contentElement = slide.slideBackgroundContentElement;
|
|
|
+
|
|
|
+ // Reset the prior background state in case this is not the
|
|
|
+ // initial sync
|
|
|
+ slide.classList.remove( 'has-dark-background' );
|
|
|
+ slide.classList.remove( 'has-light-background' );
|
|
|
+
|
|
|
+ element.removeAttribute( 'data-loaded' );
|
|
|
+ element.removeAttribute( 'data-background-hash' );
|
|
|
+ element.removeAttribute( 'data-background-size' );
|
|
|
+ element.removeAttribute( 'data-background-transition' );
|
|
|
+ element.style.backgroundColor = '';
|
|
|
+
|
|
|
+ contentElement.style.backgroundSize = '';
|
|
|
+ contentElement.style.backgroundRepeat = '';
|
|
|
+ contentElement.style.backgroundPosition = '';
|
|
|
+ contentElement.style.backgroundImage = '';
|
|
|
+ contentElement.style.opacity = '';
|
|
|
+ contentElement.innerHTML = '';
|
|
|
+
|
|
|
+ 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' ),
|
|
|
+ backgroundOpacity: slide.getAttribute( 'data-background-opacity' )
|
|
|
+ };
|
|
|
+
|
|
|
+ if( data.background ) {
|
|
|
+ // Auto-wrap image urls in url(...)
|
|
|
+ if( /^(http|file|\/\/)/gi.test( data.background ) || /\.(svg|png|jpg|jpeg|gif|bmp)([?#\s]|$)/gi.test( data.background ) ) {
|
|
|
+ slide.setAttribute( 'data-background-image', data.background );
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ element.style.background = data.background;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ // Create a hash for this combination of background settings.
|
|
|
+ // This is used to determine when two slide backgrounds are
|
|
|
+ // the same.
|
|
|
+ if( data.background || data.backgroundColor || data.backgroundImage || data.backgroundVideo || data.backgroundIframe ) {
|
|
|
+ element.setAttribute( 'data-background-hash', data.background +
|
|
|
+ data.backgroundSize +
|
|
|
+ data.backgroundImage +
|
|
|
+ data.backgroundVideo +
|
|
|
+ data.backgroundIframe +
|
|
|
+ data.backgroundColor +
|
|
|
+ data.backgroundRepeat +
|
|
|
+ data.backgroundPosition +
|
|
|
+ data.backgroundTransition +
|
|
|
+ data.backgroundOpacity );
|
|
|
+ }
|
|
|
+
|
|
|
+ // Additional and optional background properties
|
|
|
+ if( data.backgroundSize ) element.setAttribute( 'data-background-size', data.backgroundSize );
|
|
|
+ if( data.backgroundColor ) element.style.backgroundColor = data.backgroundColor;
|
|
|
+ if( data.backgroundTransition ) element.setAttribute( 'data-background-transition', data.backgroundTransition );
|
|
|
+
|
|
|
+ // Background image options are set on the content wrapper
|
|
|
+ if( data.backgroundSize ) contentElement.style.backgroundSize = data.backgroundSize;
|
|
|
+ if( data.backgroundRepeat ) contentElement.style.backgroundRepeat = data.backgroundRepeat;
|
|
|
+ if( data.backgroundPosition ) contentElement.style.backgroundPosition = data.backgroundPosition;
|
|
|
+ if( data.backgroundOpacity ) contentElement.style.opacity = data.backgroundOpacity;
|
|
|
+
|
|
|
+ // If this slide has a background color, we add a class that
|
|
|
+ // signals if it is light or dark. If the slide has no background
|
|
|
+ // color, no class will be added
|
|
|
+ var contrastColor = data.backgroundColor;
|
|
|
+
|
|
|
+ // If no bg color was found, check the computed background
|
|
|
+ if( !contrastColor ) {
|
|
|
+ var computedBackgroundStyle = window.getComputedStyle( element );
|
|
|
+ if( computedBackgroundStyle && computedBackgroundStyle.backgroundColor ) {
|
|
|
+ contrastColor = computedBackgroundStyle.backgroundColor;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ if( contrastColor ) {
|
|
|
+ var rgb = colorToRgb( contrastColor );
|
|
|
+
|
|
|
+ // Ignore fully transparent backgrounds. Some browsers return
|
|
|
+ // rgba(0,0,0,0) when reading the computed background color of
|
|
|
+ // an element with no background
|
|
|
+ if( rgb && rgb.a !== 0 ) {
|
|
|
+ if( colorBrightness( contrastColor ) < 128 ) {
|
|
|
+ slide.classList.add( 'has-dark-background' );
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ slide.classList.add( 'has-light-background' );
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Registers a listener to postMessage events, this makes it
|
|
|
+ * possible to call all reveal.js API methods from another
|
|
|
+ * window. For example:
|
|
|
+ *
|
|
|
+ * revealWindow.postMessage( JSON.stringify({
|
|
|
+ * method: 'slide',
|
|
|
+ * args: [ 2 ]
|
|
|
+ * }), '*' );
|
|
|
+ */
|
|
|
+ function setupPostMessage() {
|
|
|
+
|
|
|
+ if( config.postMessage ) {
|
|
|
+ window.addEventListener( 'message', 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();
|
|
|
+ }
|
|
|
+
|
|
|
+ // Auto-hide the mouse pointer when its inactive
|
|
|
+ if( config.hideInactiveCursor ) {
|
|
|
+ document.addEventListener( 'mousemove', onDocumentCursorActive, false );
|
|
|
+ document.addEventListener( 'mousedown', onDocumentCursorActive, false );
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ showCursor();
|
|
|
+
|
|
|
+ document.removeEventListener( 'mousemove', onDocumentCursorActive, false );
|
|
|
+ document.removeEventListener( 'mousedown', onDocumentCursorActive, false );
|
|
|
+ }
|
|
|
+
|
|
|
+ // Iframe link previews
|
|
|
+ if( config.previewLinks ) {
|
|
|
+ enablePreviewLinks();
|
|
|
+ disablePreviewLinks( '[data-preview-link=false]' );
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ disablePreviewLinks();
|
|
|
+ enablePreviewLinks( '[data-preview-link]:not([data-preview-link=false])' );
|
|
|
+ }
|
|
|
+
|
|
|
+ // 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;
|
|
|
+
|
|
|
+ // Add the navigation mode to the DOM so we can adjust styling
|
|
|
+ if( config.navigationMode !== 'default' ) {
|
|
|
+ dom.wrapper.setAttribute( 'data-navigation-mode', config.navigationMode );
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ dom.wrapper.removeAttribute( 'data-navigation-mode' );
|
|
|
+ }
|
|
|
+
|
|
|
+ // Define our contextual list of keyboard shortcuts
|
|
|
+ if( config.navigationMode === 'linear' ) {
|
|
|
+ keyboardShortcuts['→ , ↓ , SPACE , N , L , J'] = 'Next slide';
|
|
|
+ keyboardShortcuts['← , ↑ , P , H , K'] = 'Previous slide';
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ keyboardShortcuts['N , SPACE'] = 'Next slide';
|
|
|
+ keyboardShortcuts['P'] = 'Previous slide';
|
|
|
+ keyboardShortcuts['← , H'] = 'Navigate left';
|
|
|
+ keyboardShortcuts['→ , L'] = 'Navigate right';
|
|
|
+ keyboardShortcuts['↑ , K'] = 'Navigate up';
|
|
|
+ keyboardShortcuts['↓ , J'] = 'Navigate down';
|
|
|
+ }
|
|
|
+
|
|
|
+ keyboardShortcuts['Home , ⌘/CTRL ←'] = 'First slide';
|
|
|
+ keyboardShortcuts['End , ⌘/CTRL →'] = 'Last slide';
|
|
|
+ keyboardShortcuts['B , .'] = 'Pause';
|
|
|
+ keyboardShortcuts['F'] = 'Fullscreen';
|
|
|
+ keyboardShortcuts['ESC, O'] = 'Slide overview';
|
|
|
+
|
|
|
+ sync();
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Binds all event listeners.
|
|
|
+ */
|
|
|
+ function addEventListeners() {
|
|
|
+
|
|
|
+ eventsAreBound = true;
|
|
|
+
|
|
|
+ window.addEventListener( 'hashchange', onWindowHashChange, false );
|
|
|
+ window.addEventListener( 'resize', onWindowResize, false );
|
|
|
+
|
|
|
+ if( config.touch ) {
|
|
|
+ if( 'onpointerdown' in window ) {
|
|
|
+ // Use W3C pointer events
|
|
|
+ dom.wrapper.addEventListener( 'pointerdown', onPointerDown, false );
|
|
|
+ dom.wrapper.addEventListener( 'pointermove', onPointerMove, false );
|
|
|
+ dom.wrapper.addEventListener( 'pointerup', onPointerUp, false );
|
|
|
+ }
|
|
|
+ else if( window.navigator.msPointerEnabled ) {
|
|
|
+ // IE 10 uses prefixed version of pointer events
|
|
|
+ dom.wrapper.addEventListener( 'MSPointerDown', onPointerDown, false );
|
|
|
+ dom.wrapper.addEventListener( 'MSPointerMove', onPointerMove, false );
|
|
|
+ dom.wrapper.addEventListener( 'MSPointerUp', onPointerUp, false );
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ // Fall back to touch events
|
|
|
+ dom.wrapper.addEventListener( 'touchstart', onTouchStart, false );
|
|
|
+ dom.wrapper.addEventListener( 'touchmove', onTouchMove, false );
|
|
|
+ dom.wrapper.addEventListener( 'touchend', onTouchEnd, false );
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ if( config.keyboard ) {
|
|
|
+ document.addEventListener( 'keydown', onDocumentKeyDown, false );
|
|
|
+ document.addEventListener( 'keypress', onDocumentKeyPress, false );
|
|
|
+ }
|
|
|
+
|
|
|
+ if( config.progress && dom.progress ) {
|
|
|
+ dom.progress.addEventListener( 'click', onProgressClicked, false );
|
|
|
+ }
|
|
|
+
|
|
|
+ dom.pauseOverlay.addEventListener( 'click', resume, false );
|
|
|
+
|
|
|
+ if( config.focusBodyOnPageVisibilityChange ) {
|
|
|
+ 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( 'pointerdown', onPointerDown, false );
|
|
|
+ dom.wrapper.removeEventListener( 'pointermove', onPointerMove, false );
|
|
|
+ dom.wrapper.removeEventListener( 'pointerup', onPointerUp, false );
|
|
|
+
|
|
|
+ dom.wrapper.removeEventListener( 'MSPointerDown', onPointerDown, false );
|
|
|
+ dom.wrapper.removeEventListener( 'MSPointerMove', onPointerMove, false );
|
|
|
+ dom.wrapper.removeEventListener( 'MSPointerUp', onPointerUp, false );
|
|
|
+
|
|
|
+ dom.wrapper.removeEventListener( 'touchstart', onTouchStart, false );
|
|
|
+ dom.wrapper.removeEventListener( 'touchmove', onTouchMove, false );
|
|
|
+ dom.wrapper.removeEventListener( 'touchend', onTouchEnd, false );
|
|
|
+
|
|
|
+ dom.pauseOverlay.removeEventListener( 'click', resume, false );
|
|
|
+
|
|
|
+ if ( config.progress && dom.progress ) {
|
|
|
+ dom.progress.removeEventListener( 'click', onProgressClicked, false );
|
|
|
+ }
|
|
|
+
|
|
|
+ [ 'touchstart', 'click' ].forEach( 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 ); } );
|
|
|
+ } );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Registers a new plugin with this reveal.js instance.
|
|
|
+ *
|
|
|
+ * reveal.js waits for all regisered plugins to initialize
|
|
|
+ * before considering itself ready, as long as the plugin
|
|
|
+ * is registered before calling `Reveal.initialize()`.
|
|
|
+ */
|
|
|
+ function registerPlugin( id, plugin ) {
|
|
|
+
|
|
|
+ if( plugins[id] === undefined ) {
|
|
|
+ plugins[id] = plugin;
|
|
|
+
|
|
|
+ // If a plugin is registered after reveal.js is loaded,
|
|
|
+ // initialize it right away
|
|
|
+ if( loaded && typeof plugin.init === 'function' ) {
|
|
|
+ plugin.init();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ console.warn( 'reveal.js: "'+ id +'" plugin has already been registered' );
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Checks if a specific plugin has been registered.
|
|
|
+ *
|
|
|
+ * @param {String} id Unique plugin identifier
|
|
|
+ */
|
|
|
+ function hasPlugin( id ) {
|
|
|
+
|
|
|
+ return !!plugins[id];
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Returns the specific plugin instance, if a plugin
|
|
|
+ * with the given ID has been registered.
|
|
|
+ *
|
|
|
+ * @param {String} id Unique plugin identifier
|
|
|
+ */
|
|
|
+ function getPlugin( id ) {
|
|
|
+
|
|
|
+ return plugins[id];
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Add a custom key binding with optional description to
|
|
|
+ * be added to the help screen.
|
|
|
+ */
|
|
|
+ function addKeyBinding( binding, callback ) {
|
|
|
+
|
|
|
+ if( typeof binding === 'object' && binding.keyCode ) {
|
|
|
+ registeredKeyBindings[binding.keyCode] = {
|
|
|
+ callback: callback,
|
|
|
+ key: binding.key,
|
|
|
+ description: binding.description
|
|
|
+ };
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ registeredKeyBindings[binding] = {
|
|
|
+ callback: callback,
|
|
|
+ key: null,
|
|
|
+ description: null
|
|
|
+ };
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Removes the specified custom key binding.
|
|
|
+ */
|
|
|
+ function removeKeyBinding( keyCode ) {
|
|
|
+
|
|
|
+ delete registeredKeyBindings[keyCode];
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 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';
|
|
|
+
|
|
|
+ // In Overview mode, the parent (.slide) height is set of 700px.
|
|
|
+ // Restore it temporarily to its natural height.
|
|
|
+ element.parentNode.style.height = 'auto';
|
|
|
+
|
|
|
+ newHeight = height - element.parentNode.offsetHeight;
|
|
|
+
|
|
|
+ // Restore the old height, just in case
|
|
|
+ element.style.height = oldHeight + 'px';
|
|
|
+
|
|
|
+ // Clear the parent (.slide) height. .removeProperty works in IE9+
|
|
|
+ element.parentNode.style.removeProperty('height');
|
|
|
+
|
|
|
+ return newHeight;
|
|
|
+ }
|
|
|
+
|
|
|
+ return height;
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Checks if this instance is being used to print a PDF.
|
|
|
+ */
|
|
|
+ function isPrintingPDF() {
|
|
|
+
|
|
|
+ return ( /print-pdf/gi ).test( window.location.search );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 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>';
|
|
|
+ }
|
|
|
+
|
|
|
+ // Add custom key bindings that have associated descriptions
|
|
|
+ for( var binding in registeredKeyBindings ) {
|
|
|
+ if( registeredKeyBindings[binding].key && registeredKeyBindings[binding].description ) {
|
|
|
+ html += '<tr><td>' + registeredKeyBindings[binding].key + '</td><td>' + registeredKeyBindings[binding].description + '</td></tr>';
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ html += '</table>';
|
|
|
+
|
|
|
+ dom.overlay.innerHTML = [
|
|
|
+ '<header>',
|
|
|
+ '<a class="close" href="#"><span class="icon"></span></a>',
|
|
|
+ '</header>',
|
|
|
+ '<div class="viewport">',
|
|
|
+ '<div class="viewport-inner">'+ html +'</div>',
|
|
|
+ '</div>'
|
|
|
+ ].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() ) {
|
|
|
+
|
|
|
+ if( !config.disableLayout ) {
|
|
|
+
|
|
|
+ // On some mobile devices '100vh' is taller than the visible
|
|
|
+ // viewport which leads to part of the presentation being
|
|
|
+ // cut off. To work around this we define our own '--vh' custom
|
|
|
+ // property where 100x adds up to the correct height.
|
|
|
+ //
|
|
|
+ // https://css-tricks.com/the-trick-to-viewport-units-on-mobile/
|
|
|
+ if( isMobileDevice ) {
|
|
|
+ document.documentElement.style.setProperty( '--vh', ( window.innerHeight * 0.01 ) + 'px' );
|
|
|
+ }
|
|
|
+
|
|
|
+ var size = getComputedSlideSize();
|
|
|
+
|
|
|
+ var oldScale = scale;
|
|
|
+
|
|
|
+ // Layout the contents of the slides
|
|
|
+ layoutSlideContents( config.width, config.height );
|
|
|
+
|
|
|
+ dom.slides.style.width = size.width + 'px';
|
|
|
+ dom.slides.style.height = size.height + 'px';
|
|
|
+
|
|
|
+ // Determine scale of content to fit within available space
|
|
|
+ scale = Math.min( size.presentationWidth / size.width, size.presentationHeight / size.height );
|
|
|
+
|
|
|
+ // Respect max/min scale settings
|
|
|
+ scale = Math.max( scale, config.minScale );
|
|
|
+ scale = Math.min( scale, config.maxScale );
|
|
|
+
|
|
|
+ // Don't apply any scaling styles if scale is 1
|
|
|
+ if( scale === 1 ) {
|
|
|
+ dom.slides.style.zoom = '';
|
|
|
+ dom.slides.style.left = '';
|
|
|
+ dom.slides.style.top = '';
|
|
|
+ dom.slides.style.bottom = '';
|
|
|
+ dom.slides.style.right = '';
|
|
|
+ transformSlides( { layout: '' } );
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ // 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 = '50%';
|
|
|
+ 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 = '';
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ if( oldScale !== scale ) {
|
|
|
+ dispatchEvent( 'resize', {
|
|
|
+ 'oldScale': oldScale,
|
|
|
+ 'scale': scale,
|
|
|
+ 'size': size
|
|
|
+ } );
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ updateProgress();
|
|
|
+ updateParallax();
|
|
|
+
|
|
|
+ if( isOverview() ) {
|
|
|
+ updateOverview();
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Applies layout logic to the contents of all slides in
|
|
|
+ * the presentation.
|
|
|
+ *
|
|
|
+ * @param {string|number} width
|
|
|
+ * @param {string|number} height
|
|
|
+ */
|
|
|
+ function layoutSlideContents( width, height ) {
|
|
|
+
|
|
|
+ // Handle sizing of elements with the 'stretch' class
|
|
|
+ toArray( dom.slides.querySelectorAll( 'section > .stretch' ) ).forEach( 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;
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Return a hash URL that will resolve to the current slide location.
|
|
|
+ */
|
|
|
+ function locationHash() {
|
|
|
+
|
|
|
+ var url = '/';
|
|
|
+
|
|
|
+ // Attempt to create a named link based on the slide's ID
|
|
|
+ var id = currentSlide ? currentSlide.getAttribute( 'id' ) : null;
|
|
|
+ if( id ) {
|
|
|
+ id = encodeURIComponent( id );
|
|
|
+ }
|
|
|
+
|
|
|
+ var indexf;
|
|
|
+ if( config.fragmentInURL ) {
|
|
|
+ indexf = getIndices().f;
|
|
|
+ }
|
|
|
+
|
|
|
+ // If the current slide has an ID, use that as a named link,
|
|
|
+ // but we don't support named links with a fragment index
|
|
|
+ if( typeof id === 'string' && id.length && indexf === undefined ) {
|
|
|
+ url = '/' + id;
|
|
|
+ }
|
|
|
+ // Otherwise use the /h/v index
|
|
|
+ else {
|
|
|
+ var hashIndexBase = config.hashOneBasedIndex ? 1 : 0;
|
|
|
+ if( indexh > 0 || indexv > 0 || indexf !== undefined ) url += indexh + hashIndexBase;
|
|
|
+ if( indexv > 0 || indexf !== undefined ) url += '/' + (indexv + hashIndexBase );
|
|
|
+ if( indexf !== undefined ) url += '/' + indexf;
|
|
|
+ }
|
|
|
+
|
|
|
+ return url;
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Checks if the current or specified slide is vertical
|
|
|
+ * (nested within another slide).
|
|
|
+ *
|
|
|
+ * @param {HTMLElement} [slide=currentSlide] The slide to check
|
|
|
+ * orientation of
|
|
|
+ * @return {Boolean}
|
|
|
+ */
|
|
|
+ function isVerticalSlide( slide ) {
|
|
|
+
|
|
|
+ // 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 );
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Shows the mouse pointer after it has been hidden with
|
|
|
+ * #hideCursor.
|
|
|
+ */
|
|
|
+ function showCursor() {
|
|
|
+
|
|
|
+ if( cursorHidden ) {
|
|
|
+ cursorHidden = false;
|
|
|
+ dom.wrapper.style.cursor = '';
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Hides the mouse pointer when it's on top of the .reveal
|
|
|
+ * container.
|
|
|
+ */
|
|
|
+ function hideCursor() {
|
|
|
+
|
|
|
+ if( cursorHidden === false ) {
|
|
|
+ cursorHidden = true;
|
|
|
+ dom.wrapper.style.cursor = 'none';
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Enters the paused mode which fades everything on screen to
|
|
|
+ * black.
|
|
|
+ */
|
|
|
+ function pause() {
|
|
|
+
|
|
|
+ if( config.pause ) {
|
|
|
+ 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();
|
|
|
+
|
|
|
+ // 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) {
|
|
|
+ // Ensure that the previous slide is never the same as the current
|
|
|
+ previousSlide = null;
|
|
|
+ }
|
|
|
+
|
|
|
+ // Solves an edge case where the previous slide maintains the
|
|
|
+ // 'present' class when navigating between adjacent vertical
|
|
|
+ // stacks
|
|
|
+ if( previousSlide && previousSlide !== currentSlide ) {
|
|
|
+ previousSlide.classList.remove( 'present' );
|
|
|
+ previousSlide.setAttribute( 'aria-hidden', 'true' );
|
|
|
+
|
|
|
+ // Reset all slides upon navigate to home
|
|
|
+ // 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 );
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ // Apply the new state
|
|
|
+ stateLoop: for( var i = 0, len = state.length; i < len; i++ ) {
|
|
|
+ // Check if this state existed on the previous slide. If it
|
|
|
+ // did, we will avoid adding it repeatedly
|
|
|
+ for( var j = 0; j < stateBefore.length; j++ ) {
|
|
|
+ if( stateBefore[j] === state[i] ) {
|
|
|
+ stateBefore.splice( j, 1 );
|
|
|
+ continue stateLoop;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ document.documentElement.classList.add( state[i] );
|
|
|
+
|
|
|
+ // Dispatch custom event matching the state's name
|
|
|
+ dispatchEvent( state[i] );
|
|
|
+ }
|
|
|
+
|
|
|
+ // Clean up the remains of the previous state
|
|
|
+ while( stateBefore.length ) {
|
|
|
+ document.documentElement.classList.remove( stateBefore.pop() );
|
|
|
+ }
|
|
|
+
|
|
|
+ if( slideChanged ) {
|
|
|
+ dispatchEvent( 'slidechanged', {
|
|
|
+ 'indexh': indexh,
|
|
|
+ 'indexv': indexv,
|
|
|
+ 'previousSlide': previousSlide,
|
|
|
+ 'currentSlide': currentSlide,
|
|
|
+ 'origin': o
|
|
|
+ } );
|
|
|
+ }
|
|
|
+
|
|
|
+ // Handle embedded content
|
|
|
+ if( slideChanged || !previousSlide ) {
|
|
|
+ stopEmbeddedContent( previousSlide );
|
|
|
+ startEmbeddedContent( currentSlide );
|
|
|
+ }
|
|
|
+
|
|
|
+ // Announce the current slide contents, for screen readers
|
|
|
+ dom.statusDiv.textContent = getStatusText( currentSlide );
|
|
|
+
|
|
|
+ updateControls();
|
|
|
+ updateProgress();
|
|
|
+ updateBackground();
|
|
|
+ updateParallax();
|
|
|
+ updateSlideNumber();
|
|
|
+ updateNotes();
|
|
|
+ updateFragments();
|
|
|
+
|
|
|
+ // Update the URL hash
|
|
|
+ writeURL();
|
|
|
+
|
|
|
+ cueAutoSlide();
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Syncs the presentation with the current DOM. Useful
|
|
|
+ * when new slides or control elements are added or when
|
|
|
+ * the configuration has changed.
|
|
|
+ */
|
|
|
+ function sync() {
|
|
|
+
|
|
|
+ // Subscribe to input
|
|
|
+ removeEventListeners();
|
|
|
+ addEventListeners();
|
|
|
+
|
|
|
+ // Force a layout to make sure the current config is accounted for
|
|
|
+ layout();
|
|
|
+
|
|
|
+ // Reflect the current autoSlide value
|
|
|
+ autoSlide = config.autoSlide;
|
|
|
+
|
|
|
+ // Start auto-sliding if it's enabled
|
|
|
+ cueAutoSlide();
|
|
|
+
|
|
|
+ // Re-create the slide backgrounds
|
|
|
+ createBackgrounds();
|
|
|
+
|
|
|
+ // Write the current hash to the URL
|
|
|
+ writeURL();
|
|
|
+
|
|
|
+ sortAllFragments();
|
|
|
+
|
|
|
+ updateControls();
|
|
|
+ updateProgress();
|
|
|
+ updateSlideNumber();
|
|
|
+ updateSlidesVisibility();
|
|
|
+ updateBackground( true );
|
|
|
+ updateNotesVisibility();
|
|
|
+ updateNotes();
|
|
|
+
|
|
|
+ formatEmbeddedContent();
|
|
|
+
|
|
|
+ // Start or stop embedded content depending on global config
|
|
|
+ if( config.autoPlayMedia === false ) {
|
|
|
+ stopEmbeddedContent( currentSlide, { unloadIframes: false } );
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ startEmbeddedContent( currentSlide );
|
|
|
+ }
|
|
|
+
|
|
|
+ if( isOverview() ) {
|
|
|
+ layoutOverview();
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Updates reveal.js to keep in sync with new slide attributes. For
|
|
|
+ * example, if you add a new `data-background-image` you can call
|
|
|
+ * this to have reveal.js render the new background image.
|
|
|
+ *
|
|
|
+ * Similar to #sync() but more efficient when you only need to
|
|
|
+ * refresh a specific slide.
|
|
|
+ *
|
|
|
+ * @param {HTMLElement} slide
|
|
|
+ */
|
|
|
+ function syncSlide( slide ) {
|
|
|
+
|
|
|
+ // Default to the current slide
|
|
|
+ slide = slide || currentSlide;
|
|
|
+
|
|
|
+ syncBackground( slide );
|
|
|
+ syncFragments( slide );
|
|
|
+
|
|
|
+ updateBackground();
|
|
|
+ updateNotes();
|
|
|
+
|
|
|
+ loadSlide( slide );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Formats the fragments on the given slide so that they have
|
|
|
+ * valid indices. Call this if fragments are changed in the DOM
|
|
|
+ * after reveal.js has already initialized.
|
|
|
+ *
|
|
|
+ * @param {HTMLElement} slide
|
|
|
+ * @return {Array} a list of the HTML fragments that were synced
|
|
|
+ */
|
|
|
+ function syncFragments( slide ) {
|
|
|
+
|
|
|
+ // Default to the current slide
|
|
|
+ slide = slide || currentSlide;
|
|
|
+
|
|
|
+ return sortFragments( slide.querySelectorAll( '.fragment' ) );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 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 ) {
|
|
|
+ // Show all fragments in prior slides
|
|
|
+ toArray( element.querySelectorAll( '.fragment' ) ).forEach( function( fragment ) {
|
|
|
+ fragment.classList.add( 'visible' );
|
|
|
+ fragment.classList.remove( 'current-fragment' );
|
|
|
+ } );
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else if( i > index ) {
|
|
|
+ // Any element subsequent to index is given the 'future' class
|
|
|
+ element.classList.add( reverse ? 'past' : 'future' );
|
|
|
+
|
|
|
+ if( config.fragments ) {
|
|
|
+ // Hide all fragments in future slides
|
|
|
+ toArray( element.querySelectorAll( '.fragment.visible' ) ).forEach( function( fragment ) {
|
|
|
+ fragment.classList.remove( 'visible' );
|
|
|
+ fragment.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 to match the current slide.
|
|
|
+ */
|
|
|
+ function updateSlideNumber() {
|
|
|
+
|
|
|
+ // Update slide number if enabled
|
|
|
+ if( config.slideNumber && dom.slideNumber ) {
|
|
|
+
|
|
|
+ var value;
|
|
|
+ var format = 'h.v';
|
|
|
+
|
|
|
+ if( typeof config.slideNumber === 'function' ) {
|
|
|
+ value = config.slideNumber();
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ // Check if a custom number format is available
|
|
|
+ if( typeof config.slideNumber === 'string' ) {
|
|
|
+ format = config.slideNumber;
|
|
|
+ }
|
|
|
+
|
|
|
+ // If there are ONLY vertical slides in this deck, always use
|
|
|
+ // a flattened slide number
|
|
|
+ if( !/c/.test( format ) && dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ).length === 1 ) {
|
|
|
+ format = 'c';
|
|
|
+ }
|
|
|
+
|
|
|
+ value = [];
|
|
|
+ switch( format ) {
|
|
|
+ case 'c':
|
|
|
+ value.push( getSlidePastCount() + 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 ) {
|
|
|
+
|
|
|
+ var url = '#' + locationHash();
|
|
|
+ if( typeof b === 'number' && !isNaN( b ) ) {
|
|
|
+ return '<a href="' + url + '">' +
|
|
|
+ '<span class="slide-number-a">'+ a +'</span>' +
|
|
|
+ '<span class="slide-number-delimiter">'+ delimiter +'</span>' +
|
|
|
+ '<span class="slide-number-b">'+ b +'</span>' +
|
|
|
+ '</a>';
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ return '<a href="' + url + '">' +
|
|
|
+ '<span class="slide-number-a">'+ a +'</span>' +
|
|
|
+ '</a>';
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Updates the state of all control/navigation arrows.
|
|
|
+ */
|
|
|
+ function updateControls() {
|
|
|
+
|
|
|
+ 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 currentBackgroundContent = currentBackground.querySelector( '.slide-background-content' );
|
|
|
+ if( currentBackgroundContent ) {
|
|
|
+
|
|
|
+ var backgroundImageURL = currentBackgroundContent.style.backgroundImage || '';
|
|
|
+
|
|
|
+ // Restart GIFs (doesn't work in Firefox)
|
|
|
+ if( /\.gif/i.test( backgroundImageURL ) ) {
|
|
|
+ currentBackgroundContent.style.backgroundImage = '';
|
|
|
+ window.getComputedStyle( currentBackgroundContent ).opacity;
|
|
|
+ currentBackgroundContent.style.backgroundImage = backgroundImageURL;
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ // Don't transition between identical backgrounds. This
|
|
|
+ // prevents unwanted flicker.
|
|
|
+ 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';
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Should the given element be preloaded?
|
|
|
+ * Decides based on local element attributes and global config.
|
|
|
+ *
|
|
|
+ * @param {HTMLElement} element
|
|
|
+ */
|
|
|
+ function shouldPreload( element ) {
|
|
|
+
|
|
|
+ // Prefer an explicit global preload setting
|
|
|
+ var preload = config.preloadIframes;
|
|
|
+
|
|
|
+ // If no global setting is available, fall back on the element's
|
|
|
+ // own preload setting
|
|
|
+ if( typeof preload !== 'boolean' ) {
|
|
|
+ preload = element.hasAttribute( 'data-preload' );
|
|
|
+ }
|
|
|
+
|
|
|
+ return preload;
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Called when the given slide is within the configured view
|
|
|
+ * distance. Shows the slide element and loads any content
|
|
|
+ * that is set to load lazily (data-src).
|
|
|
+ *
|
|
|
+ * @param {HTMLElement} slide Slide to show
|
|
|
+ */
|
|
|
+ function loadSlide( slide, options ) {
|
|
|
+
|
|
|
+ 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], iframe[data-src]' ) ).forEach( function( element ) {
|
|
|
+ if( element.tagName !== 'IFRAME' || shouldPreload( element ) ) {
|
|
|
+ element.setAttribute( 'src', element.getAttribute( 'data-src' ) );
|
|
|
+ element.setAttribute( 'data-lazy-loaded', '' );
|
|
|
+ element.removeAttribute( 'data-src' );
|
|
|
+ }
|
|
|
+ } );
|
|
|
+
|
|
|
+ // Media elements with <source> children
|
|
|
+ toArray( slide.querySelectorAll( 'video, audio' ) ).forEach( 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 background = slide.slideBackgroundElement;
|
|
|
+ if( background ) {
|
|
|
+ background.style.display = 'block';
|
|
|
+
|
|
|
+ var backgroundContent = slide.slideBackgroundContentElement;
|
|
|
+
|
|
|
+ // 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 ) {
|
|
|
+ backgroundContent.style.backgroundImage = 'url('+ encodeURI( 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 +'">';
|
|
|
+ } );
|
|
|
+
|
|
|
+ backgroundContent.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%';
|
|
|
+
|
|
|
+ backgroundContent.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 background = getSlideBackground( slide );
|
|
|
+ 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], iframe[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,
|
|
|
+ right: indexh < horizontalSlides.length - 1,
|
|
|
+ up: indexv > 0,
|
|
|
+ down: indexv < verticalSlides.length - 1
|
|
|
+ };
|
|
|
+
|
|
|
+ // Looped presentations can always be navigated as long as
|
|
|
+ // there are slides available
|
|
|
+ if( config.loop ) {
|
|
|
+ if( horizontalSlides.length > 1 ) {
|
|
|
+ routes.left = true;
|
|
|
+ routes.right = true;
|
|
|
+ }
|
|
|
+
|
|
|
+ if( verticalSlides.length > 1 ) {
|
|
|
+ routes.up = true;
|
|
|
+ routes.down = true;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ // Reverse horizontal controls for rtl
|
|
|
+ if( config.rtl ) {
|
|
|
+ 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' );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 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 the media is ready, start playback
|
|
|
+ if( el.readyState > 1 ) {
|
|
|
+ startEmbeddedMedia( { target: el } );
|
|
|
+ }
|
|
|
+ // Mobile devices never fire a loaded event so instead
|
|
|
+ // of waiting, we initiate playback
|
|
|
+ else if( isMobileDevice ) {
|
|
|
+ var promise = el.play();
|
|
|
+
|
|
|
+ // If autoplay does not work, ensure that the controls are visible so
|
|
|
+ // that the viewer can start the media on their own
|
|
|
+ if( promise && typeof promise.catch === 'function' && el.controls === false ) {
|
|
|
+ promise.catch( function() {
|
|
|
+ el.controls = true;
|
|
|
+
|
|
|
+ // Once the video does start playing, hide the controls again
|
|
|
+ el.addEventListener( 'play', function() {
|
|
|
+ el.controls = false;
|
|
|
+ } );
|
|
|
+ } );
|
|
|
+ }
|
|
|
+ }
|
|
|
+ // If the media isn't loaded, wait before playing
|
|
|
+ else {
|
|
|
+ el.removeEventListener( 'loadeddata', startEmbeddedMedia ); // remove first to avoid dupes
|
|
|
+ el.addEventListener( 'loadeddata', startEmbeddedMedia );
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+ } );
|
|
|
+
|
|
|
+ // Normal iframes
|
|
|
+ toArray( element.querySelectorAll( 'iframe[src]' ) ).forEach( 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 Math.min( pastCount / ( totalCount - 1 ), 1 );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Checks if this presentation is running inside of the
|
|
|
+ * speaker notes window.
|
|
|
+ *
|
|
|
+ * @return {boolean}
|
|
|
+ */
|
|
|
+ function isSpeakerNotes() {
|
|
|
+
|
|
|
+ return !!window.location.search.match( /receiver/gi );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Reads the current URL (hash) and navigates accordingly.
|
|
|
+ */
|
|
|
+ function readURL() {
|
|
|
+
|
|
|
+ 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 not fully numeric and there is a name we
|
|
|
+ // can assume that this is a named link
|
|
|
+ if( !/^[0-9]*$/.test( bits[0] ) && name.length ) {
|
|
|
+ var element;
|
|
|
+
|
|
|
+ // Ensure the named link is a valid HTML ID attribute
|
|
|
+ try {
|
|
|
+ element = document.getElementById( decodeURIComponent( name ) );
|
|
|
+ }
|
|
|
+ catch ( error ) { }
|
|
|
+
|
|
|
+ // Ensure that we're not already on a slide with the same name
|
|
|
+ var isSameNameAsCurrentSlide = currentSlide ? currentSlide.getAttribute( 'id' ) === name : false;
|
|
|
+
|
|
|
+ if( element ) {
|
|
|
+ // If the slide exists and is not the current slide...
|
|
|
+ if ( !isSameNameAsCurrentSlide ) {
|
|
|
+ // ...find the position of the named slide and navigate to it
|
|
|
+ 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 {
|
|
|
+ var hashIndexBase = config.hashOneBasedIndex ? 1 : 0;
|
|
|
+
|
|
|
+ // Read the index components of the hash
|
|
|
+ var h = ( parseInt( bits[0], 10 ) - hashIndexBase ) || 0,
|
|
|
+ v = ( parseInt( bits[1], 10 ) - hashIndexBase ) || 0,
|
|
|
+ f;
|
|
|
+
|
|
|
+ if( config.fragmentInURL ) {
|
|
|
+ f = parseInt( bits[2], 10 );
|
|
|
+ if( isNaN( f ) ) {
|
|
|
+ f = undefined;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ if( h !== indexh || v !== indexv || f !== undefined ) {
|
|
|
+ slide( h, v, f );
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Updates the page URL (hash) to reflect the current
|
|
|
+ * state.
|
|
|
+ *
|
|
|
+ * @param {number} delay The time in ms to wait before
|
|
|
+ * writing the hash
|
|
|
+ */
|
|
|
+ function writeURL( delay ) {
|
|
|
+
|
|
|
+ // Make sure there's never more than one timeout running
|
|
|
+ clearTimeout( writeURLTimeout );
|
|
|
+
|
|
|
+ // If a delay is specified, timeout this call
|
|
|
+ if( typeof delay === 'number' ) {
|
|
|
+ writeURLTimeout = setTimeout( writeURL, delay );
|
|
|
+ }
|
|
|
+ else if( currentSlide ) {
|
|
|
+ // If we're configured to push to history OR the history
|
|
|
+ // API is not avaialble.
|
|
|
+ if( config.history || !window.history ) {
|
|
|
+ window.location.hash = locationHash();
|
|
|
+ }
|
|
|
+ // If we're configured to reflect the current slide in the
|
|
|
+ // URL without pushing to history.
|
|
|
+ else if( config.hash ) {
|
|
|
+ window.history.replaceState( null, null, '#' + locationHash() );
|
|
|
+ }
|
|
|
+ // If history and hash are both disabled, a hash may still
|
|
|
+ // be added to the URL by clicking on a href with a hash
|
|
|
+ // target. Counter this by always removing the hash.
|
|
|
+ else {
|
|
|
+ window.history.replaceState( null, null, window.location.pathname + window.location.search );
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+ /**
|
|
|
+ * Retrieves the h/v location and fragment of the current,
|
|
|
+ * or specified, slide.
|
|
|
+ *
|
|
|
+ * @param {HTMLElement} [slide] If specified, the returned
|
|
|
+ * index will be for this slide rather than the currently
|
|
|
+ * active one
|
|
|
+ *
|
|
|
+ * @return {{h: number, v: number, f: number}}
|
|
|
+ */
|
|
|
+ function getIndices( slide ) {
|
|
|
+
|
|
|
+ // By default, return the current indices
|
|
|
+ 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)' ));
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Returns an array of objects where each object represents the
|
|
|
+ * attributes on its respective slide.
|
|
|
+ */
|
|
|
+ function getSlidesAttributes() {
|
|
|
+
|
|
|
+ return getSlides().map( function( slide ) {
|
|
|
+
|
|
|
+ var attributes = {};
|
|
|
+ for( var i = 0; i < slide.attributes.length; i++ ) {
|
|
|
+ var attribute = slide.attributes[ i ];
|
|
|
+ attributes[ attribute.name ] = attribute.value;
|
|
|
+ }
|
|
|
+ return attributes;
|
|
|
+
|
|
|
+ } );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Retrieves the total number of slides in this presentation.
|
|
|
+ *
|
|
|
+ * @return {number}
|
|
|
+ */
|
|
|
+ function getTotalSlides() {
|
|
|
+
|
|
|
+ return getSlides().length;
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Returns the slide element matching the specified index.
|
|
|
+ *
|
|
|
+ * @return {HTMLElement}
|
|
|
+ */
|
|
|
+ function getSlide( x, y ) {
|
|
|
+
|
|
|
+ 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 {mixed} x Horizontal background index OR a slide
|
|
|
+ * HTML element
|
|
|
+ * @param {number} y Vertical background index
|
|
|
+ * @return {(HTMLElement[]|*)}
|
|
|
+ */
|
|
|
+ function getSlideBackground( x, y ) {
|
|
|
+
|
|
|
+ var slide = typeof x === 'number' ? getSlide( x, y ) : x;
|
|
|
+ if( slide ) {
|
|
|
+ return slide.slideBackgroundElement;
|
|
|
+ }
|
|
|
+
|
|
|
+ return undefined;
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Retrieves the speaker notes from a slide. Notes can be
|
|
|
+ * defined in two ways:
|
|
|
+ * 1. As a data-notes attribute on the slide <section>
|
|
|
+ * 2. As an <aside class="notes"> inside of the slide
|
|
|
+ *
|
|
|
+ * @param {HTMLElement} [slide=currentSlide]
|
|
|
+ * @return {(string|null)}
|
|
|
+ */
|
|
|
+ function getSlideNotes( slide ) {
|
|
|
+
|
|
|
+ // 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
|
|
|
+ * @param {boolean} grouped If true the returned array will contain
|
|
|
+ * nested arrays for all fragments with the same index
|
|
|
+ * @return {object[]} sorted Sorted array of fragments
|
|
|
+ */
|
|
|
+ function sortFragments( fragments, grouped ) {
|
|
|
+
|
|
|
+ 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 grouped === true ? ordered : sorted;
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Refreshes the fragments on the current slide so that they
|
|
|
+ * have the appropriate classes (.visible + .current-fragment).
|
|
|
+ *
|
|
|
+ * @param {number} [index] The index of the current fragment
|
|
|
+ * @param {array} [fragments] Array containing all fragments
|
|
|
+ * in the current slide
|
|
|
+ *
|
|
|
+ * @return {{shown: array, hidden: array}}
|
|
|
+ */
|
|
|
+ function updateFragments( index, fragments ) {
|
|
|
+
|
|
|
+ var changedFragments = {
|
|
|
+ shown: [],
|
|
|
+ hidden: []
|
|
|
+ };
|
|
|
+
|
|
|
+ if( currentSlide && config.fragments ) {
|
|
|
+
|
|
|
+ fragments = fragments || sortFragments( currentSlide.querySelectorAll( '.fragment' ) );
|
|
|
+
|
|
|
+ if( fragments.length ) {
|
|
|
+
|
|
|
+ if( typeof index !== 'number' ) {
|
|
|
+ var currentFragment = sortFragments( currentSlide.querySelectorAll( '.fragment.visible' ) ).pop();
|
|
|
+ if( currentFragment ) {
|
|
|
+ index = parseInt( currentFragment.getAttribute( 'data-fragment-index' ) || 0, 10 );
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ toArray( fragments ).forEach( function( el, i ) {
|
|
|
+
|
|
|
+ if( el.hasAttribute( 'data-fragment-index' ) ) {
|
|
|
+ i = parseInt( el.getAttribute( 'data-fragment-index' ), 10 );
|
|
|
+ }
|
|
|
+
|
|
|
+ // Visible fragments
|
|
|
+ if( i <= index ) {
|
|
|
+ if( !el.classList.contains( 'visible' ) ) changedFragments.shown.push( el );
|
|
|
+ el.classList.add( 'visible' );
|
|
|
+ el.classList.remove( 'current-fragment' );
|
|
|
+
|
|
|
+ // Announce the fragments one by one to the Screen Reader
|
|
|
+ dom.statusDiv.textContent = getStatusText( el );
|
|
|
+
|
|
|
+ if( i === index ) {
|
|
|
+ el.classList.add( 'current-fragment' );
|
|
|
+ startEmbeddedContent( el );
|
|
|
+ }
|
|
|
+ }
|
|
|
+ // Hidden fragments
|
|
|
+ else {
|
|
|
+ if( el.classList.contains( 'visible' ) ) changedFragments.hidden.push( el );
|
|
|
+ el.classList.remove( 'visible' );
|
|
|
+ el.classList.remove( 'current-fragment' );
|
|
|
+ }
|
|
|
+
|
|
|
+ } );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ return changedFragments;
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Navigate to the specified slide fragment.
|
|
|
+ *
|
|
|
+ * @param {?number} index The index of the fragment that
|
|
|
+ * should be shown, -1 means all are invisible
|
|
|
+ * @param {number} offset Integer offset to apply to the
|
|
|
+ * fragment index
|
|
|
+ *
|
|
|
+ * @return {boolean} true if a change was made in any
|
|
|
+ * fragments visibility as part of this call
|
|
|
+ */
|
|
|
+ function navigateFragment( index, offset ) {
|
|
|
+
|
|
|
+ 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 changedFragments = updateFragments( index, fragments );
|
|
|
+
|
|
|
+ if( changedFragments.hidden.length ) {
|
|
|
+ dispatchEvent( 'fragmenthidden', { fragment: changedFragments.hidden[0], fragments: changedFragments.hidden } );
|
|
|
+ }
|
|
|
+
|
|
|
+ if( changedFragments.shown.length ) {
|
|
|
+ dispatchEvent( 'fragmentshown', { fragment: changedFragments.shown[0], fragments: changedFragments.shown } );
|
|
|
+ }
|
|
|
+
|
|
|
+ updateControls();
|
|
|
+ updateProgress();
|
|
|
+
|
|
|
+ if( config.fragmentInURL ) {
|
|
|
+ writeURL();
|
|
|
+ }
|
|
|
+
|
|
|
+ return !!( changedFragments.shown.length || changedFragments.hidden.length );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ return false;
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Navigate to the next slide fragment.
|
|
|
+ *
|
|
|
+ * @return {boolean} true if there was a next fragment,
|
|
|
+ * false otherwise
|
|
|
+ */
|
|
|
+ function nextFragment() {
|
|
|
+
|
|
|
+ return navigateFragment( null, 1 );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Navigate to the previous slide fragment.
|
|
|
+ *
|
|
|
+ * @return {boolean} true if there was a previous fragment,
|
|
|
+ * false otherwise
|
|
|
+ */
|
|
|
+ function 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, config.navigationMode === 'grid' ? indexv : undefined );
|
|
|
+ }
|
|
|
+ }
|
|
|
+ // Normal navigation
|
|
|
+ else if( ( isOverview() || previousFragment() === false ) && availableRoutes().left ) {
|
|
|
+ slide( indexh - 1, config.navigationMode === 'grid' ? indexv : undefined );
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ function navigateRight() {
|
|
|
+
|
|
|
+ hasNavigatedRight = true;
|
|
|
+
|
|
|
+ // Reverse for RTL
|
|
|
+ if( config.rtl ) {
|
|
|
+ if( ( isOverview() || previousFragment() === false ) && availableRoutes().right ) {
|
|
|
+ slide( indexh - 1, config.navigationMode === 'grid' ? indexv : undefined );
|
|
|
+ }
|
|
|
+ }
|
|
|
+ // Normal navigation
|
|
|
+ else if( ( isOverview() || nextFragment() === false ) && availableRoutes().right ) {
|
|
|
+ slide( indexh + 1, config.navigationMode === 'grid' ? indexv : undefined );
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ function navigateUp() {
|
|
|
+
|
|
|
+ // Prioritize hiding fragments
|
|
|
+ if( ( isOverview() || 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 ) {
|
|
|
+
|
|
|
+ var routes = availableRoutes();
|
|
|
+
|
|
|
+ // When looping is enabled `routes.down` is always available
|
|
|
+ // so we need a separate check for when we've reached the
|
|
|
+ // end of a stack and should move horizontally
|
|
|
+ if( routes.down && routes.right && config.loop && Reveal.isLastVerticalSlide( currentSlide ) ) {
|
|
|
+ routes.down = false;
|
|
|
+ }
|
|
|
+
|
|
|
+ if( routes.down ) {
|
|
|
+ navigateDown();
|
|
|
+ }
|
|
|
+ else if( config.rtl ) {
|
|
|
+ navigateLeft();
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ navigateRight();
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Checks if the target element prevents the triggering of
|
|
|
+ * swipe navigation.
|
|
|
+ */
|
|
|
+ function isSwipePrevented( target ) {
|
|
|
+
|
|
|
+ while( target && typeof target.hasAttribute === 'function' ) {
|
|
|
+ if( target.hasAttribute( 'data-prevent-swipe' ) ) return true;
|
|
|
+ target = target.parentNode;
|
|
|
+ }
|
|
|
+
|
|
|
+ return false;
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+
|
|
|
+ // --------------------------------------------------------------------//
|
|
|
+ // ----------------------------- EVENTS -------------------------------//
|
|
|
+ // --------------------------------------------------------------------//
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Called by all event handlers that are based on user
|
|
|
+ * input.
|
|
|
+ *
|
|
|
+ * @param {object} [event]
|
|
|
+ */
|
|
|
+ function onUserInput( event ) {
|
|
|
+
|
|
|
+ if( config.autoSlideStoppable ) {
|
|
|
+ pauseAutoSlide();
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Called whenever there is mouse input at the document level
|
|
|
+ * to determine if the cursor is active or not.
|
|
|
+ *
|
|
|
+ * @param {object} event
|
|
|
+ */
|
|
|
+ function onDocumentCursorActive( event ) {
|
|
|
+
|
|
|
+ showCursor();
|
|
|
+
|
|
|
+ clearTimeout( cursorInactiveTimeout );
|
|
|
+
|
|
|
+ cursorInactiveTimeout = setTimeout( hideCursor, config.hideCursorTime );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Handler for the document level 'keypress' event.
|
|
|
+ *
|
|
|
+ * @param {object} event
|
|
|
+ */
|
|
|
+ function onDocumentKeyPress( event ) {
|
|
|
+
|
|
|
+ // Check if the pressed key is question mark
|
|
|
+ if( event.shiftKey && event.charCode === 63 ) {
|
|
|
+ toggleHelp();
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Handler for the document level 'keydown' event.
|
|
|
+ *
|
|
|
+ * @param {object} event
|
|
|
+ */
|
|
|
+ function onDocumentKeyDown( event ) {
|
|
|
+
|
|
|
+ // If there's a condition specified and it returns false,
|
|
|
+ // ignore this event
|
|
|
+ if( typeof config.keyboardCondition === 'function' && config.keyboardCondition(event) === false ) {
|
|
|
+ return true;
|
|
|
+ }
|
|
|
+
|
|
|
+ // Shorthand
|
|
|
+ var keyCode = event.keyCode;
|
|
|
+
|
|
|
+ // Remember if auto-sliding was paused so we can toggle it
|
|
|
+ var autoSlideWasPaused = autoSlidePaused;
|
|
|
+
|
|
|
+ onUserInput( event );
|
|
|
+
|
|
|
+ // Is there 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);
|
|
|
+
|
|
|
+ // Whitelist specific modified + keycode combinations
|
|
|
+ var prevSlideShortcut = event.shiftKey && event.keyCode === 32;
|
|
|
+ var firstSlideShortcut = ( event.metaKey || event.ctrlKey ) && keyCode === 37;
|
|
|
+ var lastSlideShortcut = ( event.metaKey || event.ctrlKey ) && keyCode === 39;
|
|
|
+
|
|
|
+ // Prevent all other events when a modifier is pressed
|
|
|
+ var unusedModifier = !prevSlideShortcut && !firstSlideShortcut && !lastSlideShortcut &&
|
|
|
+ ( event.shiftKey || event.altKey || event.ctrlKey || event.metaKey );
|
|
|
+
|
|
|
+ // Disregard the event if there's a focused element or a
|
|
|
+ // keyboard modifier key is present
|
|
|
+ if( activeElementIsCE || activeElementIsInput || activeElementIsNotes || unusedModifier ) return;
|
|
|
+
|
|
|
+ // While paused only allow resume keyboard events; 'b', 'v', '.'
|
|
|
+ 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( 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 ) === 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. Registered custom key bindings
|
|
|
+ if( triggered === false ) {
|
|
|
+
|
|
|
+ for( key in registeredKeyBindings ) {
|
|
|
+
|
|
|
+ // Check if this binding matches the pressed key
|
|
|
+ if( parseInt( key, 10 ) === keyCode ) {
|
|
|
+
|
|
|
+ var action = registeredKeyBindings[ key ].callback;
|
|
|
+
|
|
|
+ // Callback function
|
|
|
+ if( typeof action === 'function' ) {
|
|
|
+ action.apply( null, [ event ] );
|
|
|
+ }
|
|
|
+ // String shortcuts to reveal.js API
|
|
|
+ else if( typeof action === 'string' && typeof Reveal[ action ] === 'function' ) {
|
|
|
+ Reveal[ action ].call();
|
|
|
+ }
|
|
|
+
|
|
|
+ triggered = true;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ // 3. System defined key bindings
|
|
|
+ if( triggered === false ) {
|
|
|
+
|
|
|
+ // Assume true and try to prove false
|
|
|
+ triggered = true;
|
|
|
+
|
|
|
+ // P, PAGE UP
|
|
|
+ if( keyCode === 80 || keyCode === 33 ) {
|
|
|
+ navigatePrev();
|
|
|
+ }
|
|
|
+ // N, PAGE DOWN
|
|
|
+ else if( keyCode === 78 || keyCode === 34 ) {
|
|
|
+ navigateNext();
|
|
|
+ }
|
|
|
+ // H, LEFT
|
|
|
+ else if( keyCode === 72 || keyCode === 37 ) {
|
|
|
+ if( firstSlideShortcut ) {
|
|
|
+ slide( 0 );
|
|
|
+ }
|
|
|
+ else if( !isOverview() && config.navigationMode === 'linear' ) {
|
|
|
+ navigatePrev();
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ navigateLeft();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ // L, RIGHT
|
|
|
+ else if( keyCode === 76 || keyCode === 39 ) {
|
|
|
+ if( lastSlideShortcut ) {
|
|
|
+ slide( Number.MAX_VALUE );
|
|
|
+ }
|
|
|
+ else if( !isOverview() && config.navigationMode === 'linear' ) {
|
|
|
+ navigateNext();
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ navigateRight();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ // K, UP
|
|
|
+ else if( keyCode === 75 || keyCode === 38 ) {
|
|
|
+ if( !isOverview() && config.navigationMode === 'linear' ) {
|
|
|
+ navigatePrev();
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ navigateUp();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ // J, DOWN
|
|
|
+ else if( keyCode === 74 || keyCode === 40 ) {
|
|
|
+ if( !isOverview() && config.navigationMode === 'linear' ) {
|
|
|
+ navigateNext();
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ navigateDown();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ // HOME
|
|
|
+ else if( keyCode === 36 ) {
|
|
|
+ slide( 0 );
|
|
|
+ }
|
|
|
+ // END
|
|
|
+ else if( keyCode === 35 ) {
|
|
|
+ slide( Number.MAX_VALUE );
|
|
|
+ }
|
|
|
+ // SPACE
|
|
|
+ else if( keyCode === 32 ) {
|
|
|
+ if( isOverview() ) {
|
|
|
+ deactivateOverview();
|
|
|
+ }
|
|
|
+ if( event.shiftKey ) {
|
|
|
+ navigatePrev();
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ navigateNext();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ // TWO-SPOT, SEMICOLON, B, V, PERIOD, LOGITECH PRESENTER TOOLS "BLACK SCREEN" BUTTON
|
|
|
+ else if( keyCode === 58 || keyCode === 59 || keyCode === 66 || keyCode === 86 || keyCode === 190 || keyCode === 191 ) {
|
|
|
+ togglePause();
|
|
|
+ }
|
|
|
+ // F
|
|
|
+ else if( keyCode === 70 ) {
|
|
|
+ enterFullscreen();
|
|
|
+ }
|
|
|
+ // A
|
|
|
+ else if( keyCode === 65 ) {
|
|
|
+ if ( config.autoSlideStoppable ) {
|
|
|
+ toggleAutoSlide( autoSlideWasPaused );
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ triggered = false;
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ // If the input resulted in a triggered action we should prevent
|
|
|
+ // the browsers default behavior
|
|
|
+ if( triggered ) {
|
|
|
+ event.preventDefault && event.preventDefault();
|
|
|
+ }
|
|
|
+ // ESC or O key
|
|
|
+ else if ( ( keyCode === 27 || keyCode === 79 ) && 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;
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 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;
|
|
|
+
|
|
|
+ // There was only one touch point, look for a swipe
|
|
|
+ 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(); config.navigationMode === 'linear' ? navigatePrev() : navigateLeft(); }
|
|
|
+ function onNavigateRightClicked( event ) { event.preventDefault(); onUserInput(); config.navigationMode === 'linear' ? navigateNext() : navigateRight(); }
|
|
|
+ function onNavigateUpClicked( event ) { event.preventDefault(); onUserInput(); navigateUp(); }
|
|
|
+ function onNavigateDownClicked( event ) { event.preventDefault(); onUserInput(); navigateDown(); }
|
|
|
+ function onNavigatePrevClicked( event ) { event.preventDefault(); onUserInput(); navigatePrev(); }
|
|
|
+ function onNavigateNextClicked( event ) { event.preventDefault(); onUserInput(); navigateNext(); }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Handler for the window level 'hashchange' event.
|
|
|
+ *
|
|
|
+ * @param {object} [event]
|
|
|
+ */
|
|
|
+ function onWindowHashChange( event ) {
|
|
|
+
|
|
|
+ readURL();
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Handler for the window level 'resize' event.
|
|
|
+ *
|
|
|
+ * @param {object} [event]
|
|
|
+ */
|
|
|
+ function onWindowResize( event ) {
|
|
|
+
|
|
|
+ layout();
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Handle for the window level 'visibilitychange' event.
|
|
|
+ *
|
|
|
+ * @param {object} [event]
|
|
|
+ */
|
|
|
+ function onPageVisibilityChange( event ) {
|
|
|
+
|
|
|
+ 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,
|
|
|
+ syncSlide: syncSlide,
|
|
|
+ syncFragments: syncFragments,
|
|
|
+
|
|
|
+ // 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 an Array of objects representing the attributes on
|
|
|
+ // the slides
|
|
|
+ getSlidesAttributes: getSlidesAttributes,
|
|
|
+
|
|
|
+ // 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 the top-level DOM element
|
|
|
+ getRevealElement: function() {
|
|
|
+ return dom.wrapper || document.querySelector( '.reveal' );
|
|
|
+ },
|
|
|
+
|
|
|
+ // Returns a hash with all registered plugins
|
|
|
+ getPlugins: function() {
|
|
|
+ return plugins;
|
|
|
+ },
|
|
|
+
|
|
|
+ // 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 have a next sibling?
|
|
|
+ if( currentSlide.nextElementSibling ) return false;
|
|
|
+
|
|
|
+ // If it's vertical, does its parent have a next sibling?
|
|
|
+ if( isVerticalSlide( currentSlide ) && currentSlide.parentNode.nextElementSibling ) return false;
|
|
|
+
|
|
|
+ return true;
|
|
|
+ }
|
|
|
+
|
|
|
+ return false;
|
|
|
+ },
|
|
|
+
|
|
|
+ // Returns true if we're on the last slide in the current
|
|
|
+ // vertical stack
|
|
|
+ isLastVerticalSlide: function() {
|
|
|
+ if( currentSlide && isVerticalSlide( currentSlide ) ) {
|
|
|
+ // Does this slide have a next sibling?
|
|
|
+ if( currentSlide.nextElementSibling ) return false;
|
|
|
+
|
|
|
+ return true;
|
|
|
+ }
|
|
|
+
|
|
|
+ return false;
|
|
|
+ },
|
|
|
+
|
|
|
+ // Checks if reveal.js has been loaded and is ready for use
|
|
|
+ isReady: function() {
|
|
|
+ return loaded;
|
|
|
+ },
|
|
|
+
|
|
|
+ // Forward event binding to the reveal DOM element
|
|
|
+ addEventListener: function( type, listener, useCapture ) {
|
|
|
+ if( 'addEventListener' in window ) {
|
|
|
+ Reveal.getRevealElement().addEventListener( type, listener, useCapture );
|
|
|
+ }
|
|
|
+ },
|
|
|
+ removeEventListener: function( type, listener, useCapture ) {
|
|
|
+ if( 'addEventListener' in window ) {
|
|
|
+ Reveal.getRevealElement().removeEventListener( type, listener, useCapture );
|
|
|
+ }
|
|
|
+ },
|
|
|
+
|
|
|
+ // Adds/removes a custom key binding
|
|
|
+ addKeyBinding: addKeyBinding,
|
|
|
+ removeKeyBinding: removeKeyBinding,
|
|
|
+
|
|
|
+ // API for registering and retrieving plugins
|
|
|
+ registerPlugin: registerPlugin,
|
|
|
+ hasPlugin: hasPlugin,
|
|
|
+ getPlugin: getPlugin,
|
|
|
+
|
|
|
+ // Programmatically 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;
|
|
|
+
|
|
|
+}));
|
