6028 lines
172 KiB
JavaScript
6028 lines
172 KiB
JavaScript
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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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'use strict';
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var Reveal;
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// The reveal.js version
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var VERSION = '3.8.0';
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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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// Configuration defaults, can be overridden at initialization time
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config = {
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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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// Factor of the display size that should remain empty around the content
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margin: 0.04,
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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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// Display presentation control arrows
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controls: true,
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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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// Determines where controls appear, "edges" or "bottom-right"
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controlsLayout: 'bottom-right',
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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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// Display a presentation progress bar
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progress: true,
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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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// 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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// 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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// 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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// Push each slide change to the browser history. Implies `hash: true`
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history: false,
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// Enable keyboard shortcuts for navigation
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keyboard: true,
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// Optional function that blocks keyboard events when retuning false
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keyboardCondition: null,
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// Enable the slide overview mode
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overview: true,
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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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// Vertical centering of slides
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center: true,
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// Enables touch navigation on devices with touch input
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touch: true,
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// Loop the presentation
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loop: false,
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// Change the presentation direction to be RTL
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rtl: false,
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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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// Randomizes the order of slides each time the presentation loads
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shuffle: false,
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// Turns fragments on and off globally
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fragments: true,
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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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// 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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// 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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// Flags if it should be possible to pause the presentation (blackout)
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pause: true,
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// Flags if speaker notes should be visible to all viewers
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showNotes: false,
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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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// 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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// 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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// Stop auto-sliding after user input
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autoSlideStoppable: true,
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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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// 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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// Enable slide navigation via mouse wheel
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mouseWheel: false,
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// Apply a 3D roll to links on hover
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rollingLinks: false,
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// Hides the address bar on mobile devices
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hideAddressBar: true,
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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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// Exposes the reveal.js API through window.postMessage
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postMessage: true,
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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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// Focuses body when page changes visibility to ensure keyboard shortcuts work
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focusBodyOnPageVisibilityChange: true,
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// Transition style
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transition: 'slide', // none/fade/slide/convex/concave/zoom
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// Transition speed
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transitionSpeed: 'default', // default/fast/slow
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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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// Parallax background image
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parallaxBackgroundImage: '', // CSS syntax, e.g. "a.jpg"
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// Parallax background size
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parallaxBackgroundSize: '', // CSS syntax, e.g. "3000px 2000px"
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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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// Parallax background position
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parallaxBackgroundPosition: '', // CSS syntax, e.g. "top left"
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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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// 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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// Prints each fragment on a separate slide
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pdfSeparateFragments: true,
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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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// Number of slides away from the current that are visible
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viewDistance: 3,
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// The display mode that will be used to show slides
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display: 'block',
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// Hide cursor if inactive
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hideInactiveCursor: true,
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// Time before the cursor is hidden (in ms)
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hideCursorTime: 5000,
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// Script dependencies to load
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dependencies: []
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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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// Flags if reveal.js is loaded (has dispatched the 'ready' event)
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loaded = false,
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// Flags if the overview mode is currently active
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overview = false,
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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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// The horizontal and vertical index of the currently active slide
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indexh,
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indexv,
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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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previousBackground,
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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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// 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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// The current scale of the presentation (see width/height config)
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scale = 1,
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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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// Cached references to DOM elements
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dom = {},
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// A list of registered reveal.js plugins
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|||
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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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// Client is a mobile device, see #checkCapabilities()
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isMobileDevice,
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// Client is a desktop Chrome, see #checkCapabilities()
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isChrome,
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// Throttles mouse wheel navigation
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lastMouseWheelStep = 0,
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// Delays updates to the URL due to a Chrome thumbnailer bug
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|||
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writeURLTimeout = 0,
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// Is the mouse pointer currently hidden from view
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cursorHidden = false,
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// Timeout used to determine when the cursor is inactive
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|||
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cursorInactiveTimeout = 0,
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// Flags if the interaction event listeners are bound
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|||
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eventsAreBound = false,
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|||
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// The current auto-slide duration
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|||
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autoSlide = 0,
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// Auto slide properties
|
|||
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autoSlidePlayer,
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autoSlideTimeout = 0,
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|||
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autoSlideStartTime = -1,
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autoSlidePaused = false,
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|||
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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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|||
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startX: 0,
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|||
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startY: 0,
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|||
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startCount: 0,
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|||
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captured: false,
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|||
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threshold: 40
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|||
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},
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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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|||
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keyboardShortcuts = {},
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|||
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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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/**
|
|||
|
|
* Starts up the presentation if the client is capable.
|
|||
|
|
*/
|
|||
|
|
function initialize(options) {
|
|||
|
|
|
|||
|
|
// Make sure we only initialize once
|
|||
|
|
if (initialized === true) return;
|
|||
|
|
|
|||
|
|
initialized = true;
|
|||
|
|
|
|||
|
|
checkCapabilities();
|
|||
|
|
|
|||
|
|
if (!features.transforms2d && !features.transforms3d) {
|
|||
|
|
document.body.setAttribute('class', 'no-transforms');
|
|||
|
|
|
|||
|
|
// Since JS won't be running any further, we load all lazy
|
|||
|
|
// loading elements upfront
|
|||
|
|
var images = toArray(document.getElementsByTagName('img')),
|
|||
|
|
iframes = toArray(document.getElementsByTagName('iframe'));
|
|||
|
|
|
|||
|
|
var lazyLoadable = images.concat(iframes);
|
|||
|
|
|
|||
|
|
for (var i = 0, len = lazyLoadable.length; i < len; i++) {
|
|||
|
|
var element = lazyLoadable[i];
|
|||
|
|
if (element.getAttribute('data-src')) {
|
|||
|
|
element.setAttribute('src', element.getAttribute('data-src'));
|
|||
|
|
element.removeAttribute('data-src');
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// If the browser doesn't support core features we won't be
|
|||
|
|
// using JavaScript to control the presentation
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Cache references to key DOM elements
|
|||
|
|
dom.wrapper = document.querySelector('.reveal');
|
|||
|
|
dom.slides = document.querySelector('.reveal .slides');
|
|||
|
|
|
|||
|
|
// Force a layout when the whole page, incl fonts, has loaded
|
|||
|
|
window.addEventListener('load', layout, false);
|
|||
|
|
|
|||
|
|
var query = Reveal.getQueryHash();
|
|||
|
|
|
|||
|
|
// Do not accept new dependencies via query config to avoid
|
|||
|
|
// the potential of malicious script injection
|
|||
|
|
if (typeof query['dependencies'] !== 'undefined') delete query['dependencies'];
|
|||
|
|
|
|||
|
|
// Copy options over to our config object
|
|||
|
|
extend(config, options);
|
|||
|
|
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 --------------------------------//
|
|||
|
|
// --------------------------------------------------------------------//
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Reveal = {
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VERSION: VERSION,
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initialize: initialize,
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configure: configure,
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sync: sync,
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syncSlide: syncSlide,
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syncFragments: syncFragments,
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// Navigation methods
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slide: slide,
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left: navigateLeft,
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right: navigateRight,
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up: navigateUp,
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down: navigateDown,
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prev: navigatePrev,
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next: navigateNext,
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// Fragment methods
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navigateFragment: navigateFragment,
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prevFragment: previousFragment,
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nextFragment: nextFragment,
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// Deprecated aliases
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navigateTo: slide,
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navigateLeft: navigateLeft,
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navigateRight: navigateRight,
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navigateUp: navigateUp,
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navigateDown: navigateDown,
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navigatePrev: navigatePrev,
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navigateNext: navigateNext,
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// Forces an update in slide layout
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layout: layout,
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// Randomizes the order of slides
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shuffle: shuffle,
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// Returns an object with the available routes as booleans (left/right/top/bottom)
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availableRoutes: availableRoutes,
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// Returns an object with the available fragments as booleans (prev/next)
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availableFragments: availableFragments,
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// Toggles a help overlay with keyboard shortcuts
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toggleHelp: toggleHelp,
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// Toggles the overview mode on/off
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toggleOverview: toggleOverview,
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// Toggles the "black screen" mode on/off
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togglePause: togglePause,
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// Toggles the auto slide mode on/off
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toggleAutoSlide: toggleAutoSlide,
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// State checks
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isOverview: isOverview,
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isPaused: isPaused,
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isAutoSliding: isAutoSliding,
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isSpeakerNotes: isSpeakerNotes,
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// Slide preloading
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loadSlide: loadSlide,
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unloadSlide: unloadSlide,
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// Adds or removes all internal event listeners (such as keyboard)
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addEventListeners: addEventListeners,
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removeEventListeners: removeEventListeners,
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// Facility for persisting and restoring the presentation state
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getState: getState,
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setState: setState,
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// Presentation progress
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getSlidePastCount: getSlidePastCount,
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// Presentation progress on range of 0-1
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getProgress: getProgress,
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// Returns the indices of the current, or specified, slide
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getIndices: getIndices,
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// Returns an Array of all slides
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getSlides: getSlides,
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// Returns an Array of objects representing the attributes on
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// the slides
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getSlidesAttributes: getSlidesAttributes,
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// Returns the total number of slides
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getTotalSlides: getTotalSlides,
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// Returns the slide element at the specified index
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getSlide: getSlide,
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// Returns the slide background element at the specified index
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getSlideBackground: getSlideBackground,
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// Returns the speaker notes string for a slide, or null
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getSlideNotes: getSlideNotes,
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// Returns the previous slide element, may be null
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getPreviousSlide: function () {
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return previousSlide;
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},
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// Returns the current slide element
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getCurrentSlide: function () {
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return currentSlide;
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},
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// Returns the current scale of the presentation content
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getScale: function () {
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return scale;
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},
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// Returns the current configuration object
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getConfig: function () {
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return config;
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},
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// Helper method, retrieves query string as a key/value hash
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getQueryHash: function () {
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var query = {};
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location.search.replace(/[A-Z0-9]+?=([\w\.%-]*)/gi, function (a) {
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query[a.split('=').shift()] = a.split('=').pop();
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});
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// Basic deserialization
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for (var i in query) {
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var value = query[i];
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query[i] = deserialize(unescape(value));
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}
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return query;
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},
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// Returns the top-level DOM element
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getRevealElement: function () {
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return dom.wrapper || document.querySelector('.reveal');
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},
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// Returns a hash with all registered plugins
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getPlugins: function () {
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return plugins;
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},
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// Returns true if we're currently on the first slide
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isFirstSlide: function () {
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return (indexh === 0 && indexv === 0);
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},
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// Returns true if we're currently on the last slide
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isLastSlide: function () {
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if (currentSlide) {
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// Does this slide have a next sibling?
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if (currentSlide.nextElementSibling) return false;
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// If it's vertical, does its parent have a next sibling?
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if (isVerticalSlide(currentSlide) && currentSlide.parentNode.nextElementSibling) return false;
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return true;
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}
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return false;
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},
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// Returns true if we're on the last slide in the current
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// vertical stack
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isLastVerticalSlide: function () {
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if (currentSlide && isVerticalSlide(currentSlide)) {
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// Does this slide have a next sibling?
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if (currentSlide.nextElementSibling) return false;
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return true;
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}
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return false;
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},
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// Checks if reveal.js has been loaded and is ready for use
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isReady: function () {
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return loaded;
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},
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// Forward event binding to the reveal DOM element
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addEventListener: function (type, listener, useCapture) {
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if ('addEventListener' in window) {
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Reveal.getRevealElement().addEventListener(type, listener, useCapture);
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}
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},
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removeEventListener: function (type, listener, useCapture) {
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if ('addEventListener' in window) {
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Reveal.getRevealElement().removeEventListener(type, listener, useCapture);
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}
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},
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// Adds/removes a custom key binding
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addKeyBinding: addKeyBinding,
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removeKeyBinding: removeKeyBinding,
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// API for registering and retrieving plugins
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registerPlugin: registerPlugin,
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hasPlugin: hasPlugin,
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getPlugin: getPlugin,
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// Programmatically triggers a keyboard event
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triggerKey: function (keyCode) {
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onDocumentKeyDown({ keyCode: keyCode });
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},
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// Registers a new shortcut to include in the help overlay
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registerKeyboardShortcut: function (key, value) {
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keyboardShortcuts[key] = value;
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}
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};
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return Reveal;
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}));
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