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Diffstat (limited to 'present/js')
26 files changed, 8398 insertions, 0 deletions
diff --git a/present/js/components/playback.js b/present/js/components/playback.js new file mode 100644 index 0000000..06fa7ba --- /dev/null +++ b/present/js/components/playback.js @@ -0,0 +1,165 @@ +/** + * UI component that lets the use control auto-slide + * playback via play/pause. + */ +export default class Playback { + + /** + * @param {HTMLElement} container The component will append + * itself to this + * @param {function} progressCheck A method which will be + * called frequently to get the current playback progress on + * a range of 0-1 + */ + constructor( 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(); + + } + + setPlaying( value ) { + + const wasPlaying = this.playing; + + this.playing = value; + + // Start repainting if we weren't already + if( !wasPlaying && this.playing ) { + this.animate(); + } + else { + this.render(); + } + + } + + animate() { + + const 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 ) { + requestAnimationFrame( this.animate.bind( this ) ); + } + + } + + /** + * Renders the current progress and playback state. + */ + render() { + + let 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; + + const endAngle = ( - Math.PI / 2 ) + ( progress * ( Math.PI * 2 ) ); + const 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(); + + } + + on( type, listener ) { + this.canvas.addEventListener( type, listener, false ); + } + + off( type, listener ) { + this.canvas.removeEventListener( type, listener, false ); + } + + destroy() { + + this.playing = false; + + if( this.canvas.parentNode ) { + this.container.removeChild( this.canvas ); + } + + } + +}
\ No newline at end of file diff --git a/present/js/config.js b/present/js/config.js new file mode 100644 index 0000000..8b7a883 --- /dev/null +++ b/present/js/config.js @@ -0,0 +1,300 @@ +/** + * The default reveal.js config object. + */ +export default { + + // The "normal" size of the presentation, aspect ratio will be preserved + // when the presentation is scaled to fit different resolutions + width: 960, + height: 700, + + // Factor of the display size that should remain empty around the content + margin: 0.04, + + // Bounds for smallest/largest possible scale to apply to content + minScale: 0.2, + maxScale: 2.0, + + // Display presentation control arrows + controls: true, + + // Help the user learn the controls by providing hints, for example by + // bouncing the down arrow when they first encounter a vertical slide + controlsTutorial: true, + + // Determines where controls appear, "edges" or "bottom-right" + controlsLayout: 'bottom-right', + + // Visibility rule for backwards navigation arrows; "faded", "hidden" + // or "visible" + controlsBackArrows: 'faded', + + // Display a presentation progress bar + progress: true, + + // Display the page number of the current slide + // - true: Show slide number + // - false: Hide slide number + // + // Can optionally be set as a string that specifies the number formatting: + // - "h.v": Horizontal . vertical slide number (default) + // - "h/v": Horizontal / vertical slide number + // - "c": Flattened slide number + // - "c/t": Flattened slide number / total slides + // + // Alternatively, you can provide a function that returns the slide + // number for the current slide. The function should take in a slide + // object and return an array with one string [slideNumber] or + // three strings [n1,delimiter,n2]. See #formatSlideNumber(). + slideNumber: false, + + // Can be used to limit the contexts in which the slide number appears + // - "all": Always show the slide number + // - "print": Only when printing to PDF + // - "speaker": Only in the speaker view + showSlideNumber: 'all', + + // Use 1 based indexing for # links to match slide number (default is zero + // based) + hashOneBasedIndex: false, + + // Add the current slide number to the URL hash so that reloading the + // page/copying the URL will return you to the same slide + hash: false, + + // Flags if we should monitor the hash and change slides accordingly + respondToHashChanges: true, + + // Enable support for jump-to-slide navigation shortcuts + jumpToSlide: true, + + // Push each slide change to the browser history. Implies `hash: true` + history: false, + + // Enable keyboard shortcuts for navigation + keyboard: true, + + // Optional function that blocks keyboard events when retuning false + // + // If you set this to 'focused', we will only capture keyboard events + // for embedded decks when they are in focus + keyboardCondition: null, + + // Disables the default reveal.js slide layout (scaling and centering) + // so that you can use custom CSS layout + disableLayout: false, + + // Enable the slide overview mode + overview: true, + + // Vertical centering of slides + center: true, + + // Enables touch navigation on devices with touch input + touch: true, + + // Loop the presentation + loop: false, + + // Change the presentation direction to be RTL + rtl: false, + + // Changes the behavior of our navigation directions. + // + // "default" + // Left/right arrow keys step between horizontal slides, up/down + // arrow keys step between vertical slides. Space key steps through + // all slides (both horizontal and vertical). + // + // "linear" + // Removes the up/down arrows. Left/right arrows step through all + // slides (both horizontal and vertical). + // + // "grid" + // When this is enabled, stepping left/right from a vertical stack + // to an adjacent vertical stack will land you at the same vertical + // index. + // + // Consider a deck with six slides ordered in two vertical stacks: + // 1.1 2.1 + // 1.2 2.2 + // 1.3 2.3 + // + // If you're on slide 1.3 and navigate right, you will normally move + // from 1.3 -> 2.1. If "grid" is used, the same navigation takes you + // from 1.3 -> 2.3. + navigationMode: 'default', + + // Randomizes the order of slides each time the presentation loads + shuffle: false, + + // Turns fragments on and off globally + fragments: true, + + // Flags whether to include the current fragment in the URL, + // so that reloading brings you to the same fragment position + fragmentInURL: true, + + // Flags if the presentation is running in an embedded mode, + // i.e. contained within a limited portion of the screen + embedded: false, + + // Flags if we should show a help overlay when the question-mark + // key is pressed + help: true, + + // Flags if it should be possible to pause the presentation (blackout) + pause: true, + + // Flags if speaker notes should be visible to all viewers + showNotes: false, + + // Flags if slides with data-visibility="hidden" should be kep visible + showHiddenSlides: false, + + // Global override for autoplaying embedded media (video/audio/iframe) + // - null: Media will only autoplay if data-autoplay is present + // - true: All media will autoplay, regardless of individual setting + // - false: No media will autoplay, regardless of individual setting + autoPlayMedia: null, + + // Global override for preloading lazy-loaded iframes + // - null: Iframes with data-src AND data-preload will be loaded when within + // the viewDistance, iframes with only data-src will be loaded when visible + // - true: All iframes with data-src will be loaded when within the viewDistance + // - false: All iframes with data-src will be loaded only when visible + preloadIframes: null, + + // Can be used to globally disable auto-animation + autoAnimate: true, + + // Optionally provide a custom element matcher that will be + // used to dictate which elements we can animate between. + autoAnimateMatcher: null, + + // Default settings for our auto-animate transitions, can be + // overridden per-slide or per-element via data arguments + autoAnimateEasing: 'ease', + autoAnimateDuration: 1.0, + autoAnimateUnmatched: true, + + // CSS properties that can be auto-animated. Position & scale + // is matched separately so there's no need to include styles + // like top/right/bottom/left, width/height or margin. + autoAnimateStyles: [ + 'opacity', + 'color', + 'background-color', + 'padding', + 'font-size', + 'line-height', + 'letter-spacing', + 'border-width', + 'border-color', + 'border-radius', + 'outline', + 'outline-offset' + ], + + // Controls automatic progression to the next slide + // - 0: Auto-sliding only happens if the data-autoslide HTML attribute + // is present on the current slide or fragment + // - 1+: All slides will progress automatically at the given interval + // - false: No auto-sliding, even if data-autoslide is present + autoSlide: 0, + + // Stop auto-sliding after user input + autoSlideStoppable: true, + + // Use this method for navigation when auto-sliding (defaults to navigateNext) + autoSlideMethod: null, + + // Specify the average time in seconds that you think you will spend + // presenting each slide. This is used to show a pacing timer in the + // speaker view + defaultTiming: null, + + // Enable slide navigation via mouse wheel + mouseWheel: false, + + // Opens links in an iframe preview overlay + // Add `data-preview-link` and `data-preview-link="false"` to customise each link + // individually + previewLinks: false, + + // Exposes the reveal.js API through window.postMessage + postMessage: true, + + // Dispatches all reveal.js events to the parent window through postMessage + postMessageEvents: false, + + // Focuses body when page changes visibility to ensure keyboard shortcuts work + focusBodyOnPageVisibilityChange: true, + + // Transition style + transition: 'slide', // none/fade/slide/convex/concave/zoom + + // Transition speed + transitionSpeed: 'default', // default/fast/slow + + // Transition style for full page slide backgrounds + backgroundTransition: 'fade', // none/fade/slide/convex/concave/zoom + + // Parallax background image + parallaxBackgroundImage: '', // CSS syntax, e.g. "a.jpg" + + // Parallax background size + parallaxBackgroundSize: '', // CSS syntax, e.g. "3000px 2000px" + + // Parallax background repeat + parallaxBackgroundRepeat: '', // repeat/repeat-x/repeat-y/no-repeat/initial/inherit + + // Parallax background position + parallaxBackgroundPosition: '', // CSS syntax, e.g. "top left" + + // Amount of pixels to move the parallax background per slide step + parallaxBackgroundHorizontal: null, + parallaxBackgroundVertical: null, + + // The maximum number of pages a single slide can expand onto when printing + // to PDF, unlimited by default + pdfMaxPagesPerSlide: Number.POSITIVE_INFINITY, + + // Prints each fragment on a separate slide + pdfSeparateFragments: true, + + // Offset used to reduce the height of content within exported PDF pages. + // This exists to account for environment differences based on how you + // print to PDF. CLI printing options, like phantomjs and wkpdf, can end + // on precisely the total height of the document whereas in-browser + // printing has to end one pixel before. + pdfPageHeightOffset: -1, + + // Number of slides away from the current that are visible + viewDistance: 3, + + // Number of slides away from the current that are visible on mobile + // devices. It is advisable to set this to a lower number than + // viewDistance in order to save resources. + mobileViewDistance: 2, + + // The display mode that will be used to show slides + display: 'block', + + // Hide cursor if inactive + hideInactiveCursor: true, + + // Time before the cursor is hidden (in ms) + hideCursorTime: 5000, + + // Should we automatmically sort and set indices for fragments + // at each sync? (See Reveal.sync) + sortFragmentsOnSync: true, + + // Script dependencies to load + dependencies: [], + + // Plugin objects to register and use for this presentation + plugins: [] + +}
\ No newline at end of file diff --git a/present/js/controllers/autoanimate.js b/present/js/controllers/autoanimate.js new file mode 100644 index 0000000..3fd2c99 --- /dev/null +++ b/present/js/controllers/autoanimate.js @@ -0,0 +1,640 @@ +import { queryAll, extend, createStyleSheet, matches, closest } from '../utils/util.js' +import { FRAGMENT_STYLE_REGEX } from '../utils/constants.js' + +// Counter used to generate unique IDs for auto-animated elements +let autoAnimateCounter = 0; + +/** + * Automatically animates matching elements across + * slides with the [data-auto-animate] attribute. + */ +export default class AutoAnimate { + + constructor( Reveal ) { + + this.Reveal = Reveal; + + } + + /** + * Runs an auto-animation between the given slides. + * + * @param {HTMLElement} fromSlide + * @param {HTMLElement} toSlide + */ + run( fromSlide, toSlide ) { + + // Clean up after prior animations + this.reset(); + + let allSlides = this.Reveal.getSlides(); + let toSlideIndex = allSlides.indexOf( toSlide ); + let fromSlideIndex = allSlides.indexOf( fromSlide ); + + // Ensure that both slides are auto-animate targets with the same data-auto-animate-id value + // (including null if absent on both) and that data-auto-animate-restart isn't set on the + // physically latter slide (independent of slide direction) + if( fromSlide.hasAttribute( 'data-auto-animate' ) && toSlide.hasAttribute( 'data-auto-animate' ) + && fromSlide.getAttribute( 'data-auto-animate-id' ) === toSlide.getAttribute( 'data-auto-animate-id' ) + && !( toSlideIndex > fromSlideIndex ? toSlide : fromSlide ).hasAttribute( 'data-auto-animate-restart' ) ) { + + // Create a new auto-animate sheet + this.autoAnimateStyleSheet = this.autoAnimateStyleSheet || createStyleSheet(); + + let animationOptions = this.getAutoAnimateOptions( toSlide ); + + // Set our starting state + fromSlide.dataset.autoAnimate = 'pending'; + toSlide.dataset.autoAnimate = 'pending'; + + // Flag the navigation direction, needed for fragment buildup + animationOptions.slideDirection = toSlideIndex > fromSlideIndex ? 'forward' : 'backward'; + + // If the from-slide is hidden because it has moved outside + // the view distance, we need to temporarily show it while + // measuring + let fromSlideIsHidden = fromSlide.style.display === 'none'; + if( fromSlideIsHidden ) fromSlide.style.display = this.Reveal.getConfig().display; + + // Inject our auto-animate styles for this transition + let css = this.getAutoAnimatableElements( fromSlide, toSlide ).map( elements => { + return this.autoAnimateElements( elements.from, elements.to, elements.options || {}, animationOptions, autoAnimateCounter++ ); + } ); + + if( fromSlideIsHidden ) fromSlide.style.display = 'none'; + + // Animate unmatched elements, if enabled + if( toSlide.dataset.autoAnimateUnmatched !== 'false' && this.Reveal.getConfig().autoAnimateUnmatched === true ) { + + // Our default timings for unmatched elements + let defaultUnmatchedDuration = animationOptions.duration * 0.8, + defaultUnmatchedDelay = animationOptions.duration * 0.2; + + this.getUnmatchedAutoAnimateElements( toSlide ).forEach( unmatchedElement => { + + let unmatchedOptions = this.getAutoAnimateOptions( unmatchedElement, animationOptions ); + let id = 'unmatched'; + + // If there is a duration or delay set specifically for this + // element our unmatched elements should adhere to those + if( unmatchedOptions.duration !== animationOptions.duration || unmatchedOptions.delay !== animationOptions.delay ) { + id = 'unmatched-' + autoAnimateCounter++; + css.push( `[data-auto-animate="running"] [data-auto-animate-target="${id}"] { transition: opacity ${unmatchedOptions.duration}s ease ${unmatchedOptions.delay}s; }` ); + } + + unmatchedElement.dataset.autoAnimateTarget = id; + + }, this ); + + // Our default transition for unmatched elements + css.push( `[data-auto-animate="running"] [data-auto-animate-target="unmatched"] { transition: opacity ${defaultUnmatchedDuration}s ease ${defaultUnmatchedDelay}s; }` ); + + } + + // Setting the whole chunk of CSS at once is the most + // efficient way to do this. Using sheet.insertRule + // is multiple factors slower. + this.autoAnimateStyleSheet.innerHTML = css.join( '' ); + + // Start the animation next cycle + requestAnimationFrame( () => { + if( this.autoAnimateStyleSheet ) { + // This forces our newly injected styles to be applied in Firefox + getComputedStyle( this.autoAnimateStyleSheet ).fontWeight; + + toSlide.dataset.autoAnimate = 'running'; + } + } ); + + this.Reveal.dispatchEvent({ + type: 'autoanimate', + data: { + fromSlide, + toSlide, + sheet: this.autoAnimateStyleSheet + } + }); + + } + + } + + /** + * Rolls back all changes that we've made to the DOM so + * that as part of animating. + */ + reset() { + + // Reset slides + queryAll( this.Reveal.getRevealElement(), '[data-auto-animate]:not([data-auto-animate=""])' ).forEach( element => { + element.dataset.autoAnimate = ''; + } ); + + // Reset elements + queryAll( this.Reveal.getRevealElement(), '[data-auto-animate-target]' ).forEach( element => { + delete element.dataset.autoAnimateTarget; + } ); + + // Remove the animation sheet + if( this.autoAnimateStyleSheet && this.autoAnimateStyleSheet.parentNode ) { + this.autoAnimateStyleSheet.parentNode.removeChild( this.autoAnimateStyleSheet ); + this.autoAnimateStyleSheet = null; + } + + } + + /** + * Creates a FLIP animation where the `to` element starts out + * in the `from` element position and animates to its original + * state. + * + * @param {HTMLElement} from + * @param {HTMLElement} to + * @param {Object} elementOptions Options for this element pair + * @param {Object} animationOptions Options set at the slide level + * @param {String} id Unique ID that we can use to identify this + * auto-animate element in the DOM + */ + autoAnimateElements( from, to, elementOptions, animationOptions, id ) { + + // 'from' elements are given a data-auto-animate-target with no value, + // 'to' elements are are given a data-auto-animate-target with an ID + from.dataset.autoAnimateTarget = ''; + to.dataset.autoAnimateTarget = id; + + // Each element may override any of the auto-animate options + // like transition easing, duration and delay via data-attributes + let options = this.getAutoAnimateOptions( to, animationOptions ); + + // If we're using a custom element matcher the element options + // may contain additional transition overrides + if( typeof elementOptions.delay !== 'undefined' ) options.delay = elementOptions.delay; + if( typeof elementOptions.duration !== 'undefined' ) options.duration = elementOptions.duration; + if( typeof elementOptions.easing !== 'undefined' ) options.easing = elementOptions.easing; + + let fromProps = this.getAutoAnimatableProperties( 'from', from, elementOptions ), + toProps = this.getAutoAnimatableProperties( 'to', to, elementOptions ); + + // Maintain fragment visibility for matching elements when + // we're navigating forwards, this way the viewer won't need + // to step through the same fragments twice + if( to.classList.contains( 'fragment' ) ) { + + // Don't auto-animate the opacity of fragments to avoid + // conflicts with fragment animations + delete toProps.styles['opacity']; + + if( from.classList.contains( 'fragment' ) ) { + + let fromFragmentStyle = ( from.className.match( FRAGMENT_STYLE_REGEX ) || [''] )[0]; + let toFragmentStyle = ( to.className.match( FRAGMENT_STYLE_REGEX ) || [''] )[0]; + + // Only skip the fragment if the fragment animation style + // remains unchanged + if( fromFragmentStyle === toFragmentStyle && animationOptions.slideDirection === 'forward' ) { + to.classList.add( 'visible', 'disabled' ); + } + + } + + } + + // If translation and/or scaling are enabled, css transform + // the 'to' element so that it matches the position and size + // of the 'from' element + if( elementOptions.translate !== false || elementOptions.scale !== false ) { + + let presentationScale = this.Reveal.getScale(); + + let delta = { + x: ( fromProps.x - toProps.x ) / presentationScale, + y: ( fromProps.y - toProps.y ) / presentationScale, + scaleX: fromProps.width / toProps.width, + scaleY: fromProps.height / toProps.height + }; + + // Limit decimal points to avoid 0.0001px blur and stutter + delta.x = Math.round( delta.x * 1000 ) / 1000; + delta.y = Math.round( delta.y * 1000 ) / 1000; + delta.scaleX = Math.round( delta.scaleX * 1000 ) / 1000; + delta.scaleX = Math.round( delta.scaleX * 1000 ) / 1000; + + let translate = elementOptions.translate !== false && ( delta.x !== 0 || delta.y !== 0 ), + scale = elementOptions.scale !== false && ( delta.scaleX !== 0 || delta.scaleY !== 0 ); + + // No need to transform if nothing's changed + if( translate || scale ) { + + let transform = []; + + if( translate ) transform.push( `translate(${delta.x}px, ${delta.y}px)` ); + if( scale ) transform.push( `scale(${delta.scaleX}, ${delta.scaleY})` ); + + fromProps.styles['transform'] = transform.join( ' ' ); + fromProps.styles['transform-origin'] = 'top left'; + + toProps.styles['transform'] = 'none'; + + } + + } + + // Delete all unchanged 'to' styles + for( let propertyName in toProps.styles ) { + const toValue = toProps.styles[propertyName]; + const fromValue = fromProps.styles[propertyName]; + + if( toValue === fromValue ) { + delete toProps.styles[propertyName]; + } + else { + // If these property values were set via a custom matcher providing + // an explicit 'from' and/or 'to' value, we always inject those values. + if( toValue.explicitValue === true ) { + toProps.styles[propertyName] = toValue.value; + } + + if( fromValue.explicitValue === true ) { + fromProps.styles[propertyName] = fromValue.value; + } + } + } + + let css = ''; + + let toStyleProperties = Object.keys( toProps.styles ); + + // Only create animate this element IF at least one style + // property has changed + if( toStyleProperties.length > 0 ) { + + // Instantly move to the 'from' state + fromProps.styles['transition'] = 'none'; + + // Animate towards the 'to' state + toProps.styles['transition'] = `all ${options.duration}s ${options.easing} ${options.delay}s`; + toProps.styles['transition-property'] = toStyleProperties.join( ', ' ); + toProps.styles['will-change'] = toStyleProperties.join( ', ' ); + + // Build up our custom CSS. We need to override inline styles + // so we need to make our styles vErY IMPORTANT!1!! + let fromCSS = Object.keys( fromProps.styles ).map( propertyName => { + return propertyName + ': ' + fromProps.styles[propertyName] + ' !important;'; + } ).join( '' ); + + let toCSS = Object.keys( toProps.styles ).map( propertyName => { + return propertyName + ': ' + toProps.styles[propertyName] + ' !important;'; + } ).join( '' ); + + css = '[data-auto-animate-target="'+ id +'"] {'+ fromCSS +'}' + + '[data-auto-animate="running"] [data-auto-animate-target="'+ id +'"] {'+ toCSS +'}'; + + } + + return css; + + } + + /** + * Returns the auto-animate options for the given element. + * + * @param {HTMLElement} element Element to pick up options + * from, either a slide or an animation target + * @param {Object} [inheritedOptions] Optional set of existing + * options + */ + getAutoAnimateOptions( element, inheritedOptions ) { + + let options = { + easing: this.Reveal.getConfig().autoAnimateEasing, + duration: this.Reveal.getConfig().autoAnimateDuration, + delay: 0 + }; + + options = extend( options, inheritedOptions ); + + // Inherit options from parent elements + if( element.parentNode ) { + let autoAnimatedParent = closest( element.parentNode, '[data-auto-animate-target]' ); + if( autoAnimatedParent ) { + options = this.getAutoAnimateOptions( autoAnimatedParent, options ); + } + } + + if( element.dataset.autoAnimateEasing ) { + options.easing = element.dataset.autoAnimateEasing; + } + + if( element.dataset.autoAnimateDuration ) { + options.duration = parseFloat( element.dataset.autoAnimateDuration ); + } + + if( element.dataset.autoAnimateDelay ) { + options.delay = parseFloat( element.dataset.autoAnimateDelay ); + } + + return options; + + } + + /** + * Returns an object containing all of the properties + * that can be auto-animated for the given element and + * their current computed values. + * + * @param {String} direction 'from' or 'to' + */ + getAutoAnimatableProperties( direction, element, elementOptions ) { + + let config = this.Reveal.getConfig(); + + let properties = { styles: [] }; + + // Position and size + if( elementOptions.translate !== false || elementOptions.scale !== false ) { + let bounds; + + // Custom auto-animate may optionally return a custom tailored + // measurement function + if( typeof elementOptions.measure === 'function' ) { + bounds = elementOptions.measure( element ); + } + else { + if( config.center ) { + // More precise, but breaks when used in combination + // with zoom for scaling the deck ¯\_(ツ)_/¯ + bounds = element.getBoundingClientRect(); + } + else { + let scale = this.Reveal.getScale(); + bounds = { + x: element.offsetLeft * scale, + y: element.offsetTop * scale, + width: element.offsetWidth * scale, + height: element.offsetHeight * scale + }; + } + } + + properties.x = bounds.x; + properties.y = bounds.y; + properties.width = bounds.width; + properties.height = bounds.height; + } + + const computedStyles = getComputedStyle( element ); + + // CSS styles + ( elementOptions.styles || config.autoAnimateStyles ).forEach( style => { + let value; + + // `style` is either the property name directly, or an object + // definition of a style property + if( typeof style === 'string' ) style = { property: style }; + + if( typeof style.from !== 'undefined' && direction === 'from' ) { + value = { value: style.from, explicitValue: true }; + } + else if( typeof style.to !== 'undefined' && direction === 'to' ) { + value = { value: style.to, explicitValue: true }; + } + else { + // Use a unitless value for line-height so that it inherits properly + if( style.property === 'line-height' ) { + value = parseFloat( computedStyles['line-height'] ) / parseFloat( computedStyles['font-size'] ); + } + + if( isNaN(value) ) { + value = computedStyles[style.property]; + } + } + + if( value !== '' ) { + properties.styles[style.property] = value; + } + } ); + + return properties; + + } + + /** + * Get a list of all element pairs that we can animate + * between the given slides. + * + * @param {HTMLElement} fromSlide + * @param {HTMLElement} toSlide + * + * @return {Array} Each value is an array where [0] is + * the element we're animating from and [1] is the + * element we're animating to + */ + getAutoAnimatableElements( fromSlide, toSlide ) { + + let matcher = typeof this.Reveal.getConfig().autoAnimateMatcher === 'function' ? this.Reveal.getConfig().autoAnimateMatcher : this.getAutoAnimatePairs; + + let pairs = matcher.call( this, fromSlide, toSlide ); + + let reserved = []; + + // Remove duplicate pairs + return pairs.filter( ( pair, index ) => { + if( reserved.indexOf( pair.to ) === -1 ) { + reserved.push( pair.to ); + return true; + } + } ); + + } + + /** + * Identifies matching elements between slides. + * + * You can specify a custom matcher function by using + * the `autoAnimateMatcher` config option. + */ + getAutoAnimatePairs( fromSlide, toSlide ) { + + let pairs = []; + + const codeNodes = 'pre'; + const textNodes = 'h1, h2, h3, h4, h5, h6, p, li'; + const mediaNodes = 'img, video, iframe'; + + // Explicit matches via data-id + this.findAutoAnimateMatches( pairs, fromSlide, toSlide, '[data-id]', node => { + return node.nodeName + ':::' + node.getAttribute( 'data-id' ); + } ); + + // Text + this.findAutoAnimateMatches( pairs, fromSlide, toSlide, textNodes, node => { + return node.nodeName + ':::' + node.innerText; + } ); + + // Media + this.findAutoAnimateMatches( pairs, fromSlide, toSlide, mediaNodes, node => { + return node.nodeName + ':::' + ( node.getAttribute( 'src' ) || node.getAttribute( 'data-src' ) ); + } ); + + // Code + this.findAutoAnimateMatches( pairs, fromSlide, toSlide, codeNodes, node => { + return node.nodeName + ':::' + node.innerText; + } ); + + pairs.forEach( pair => { + // Disable scale transformations on text nodes, we transition + // each individual text property instead + if( matches( pair.from, textNodes ) ) { + pair.options = { scale: false }; + } + // Animate individual lines of code + else if( matches( pair.from, codeNodes ) ) { + + // Transition the code block's width and height instead of scaling + // to prevent its content from being squished + pair.options = { scale: false, styles: [ 'width', 'height' ] }; + + // Lines of code + this.findAutoAnimateMatches( pairs, pair.from, pair.to, '.hljs .hljs-ln-code', node => { + return node.textContent; + }, { + scale: false, + styles: [], + measure: this.getLocalBoundingBox.bind( this ) + } ); + + // Line numbers + this.findAutoAnimateMatches( pairs, pair.from, pair.to, '.hljs .hljs-ln-numbers[data-line-number]', node => { + return node.getAttribute( 'data-line-number' ); + }, { + scale: false, + styles: [ 'width' ], + measure: this.getLocalBoundingBox.bind( this ) + } ); + + } + + }, this ); + + return pairs; + + } + + /** + * Helper method which returns a bounding box based on + * the given elements offset coordinates. + * + * @param {HTMLElement} element + * @return {Object} x, y, width, height + */ + getLocalBoundingBox( element ) { + + const presentationScale = this.Reveal.getScale(); + + return { + x: Math.round( ( element.offsetLeft * presentationScale ) * 100 ) / 100, + y: Math.round( ( element.offsetTop * presentationScale ) * 100 ) / 100, + width: Math.round( ( element.offsetWidth * presentationScale ) * 100 ) / 100, + height: Math.round( ( element.offsetHeight * presentationScale ) * 100 ) / 100 + }; + + } + + /** + * Finds matching elements between two slides. + * + * @param {Array} pairs List of pairs to push matches to + * @param {HTMLElement} fromScope Scope within the from element exists + * @param {HTMLElement} toScope Scope within the to element exists + * @param {String} selector CSS selector of the element to match + * @param {Function} serializer A function that accepts an element and returns + * a stringified ID based on its contents + * @param {Object} animationOptions Optional config options for this pair + */ + findAutoAnimateMatches( pairs, fromScope, toScope, selector, serializer, animationOptions ) { + + let fromMatches = {}; + let toMatches = {}; + + [].slice.call( fromScope.querySelectorAll( selector ) ).forEach( ( element, i ) => { + const key = serializer( element ); + if( typeof key === 'string' && key.length ) { + fromMatches[key] = fromMatches[key] || []; + fromMatches[key].push( element ); + } + } ); + + [].slice.call( toScope.querySelectorAll( selector ) ).forEach( ( element, i ) => { + const key = serializer( element ); + toMatches[key] = toMatches[key] || []; + toMatches[key].push( element ); + + let fromElement; + + // Retrieve the 'from' element + if( fromMatches[key] ) { + const primaryIndex = toMatches[key].length - 1; + const secondaryIndex = fromMatches[key].length - 1; + + // If there are multiple identical from elements, retrieve + // the one at the same index as our to-element. + if( fromMatches[key][ primaryIndex ] ) { + fromElement = fromMatches[key][ primaryIndex ]; + fromMatches[key][ primaryIndex ] = null; + } + // If there are no matching from-elements at the same index, + // use the last one. + else if( fromMatches[key][ secondaryIndex ] ) { + fromElement = fromMatches[key][ secondaryIndex ]; + fromMatches[key][ secondaryIndex ] = null; + } + } + + // If we've got a matching pair, push it to the list of pairs + if( fromElement ) { + pairs.push({ + from: fromElement, + to: element, + options: animationOptions + }); + } + } ); + + } + + /** + * Returns a all elements within the given scope that should + * be considered unmatched in an auto-animate transition. If + * fading of unmatched elements is turned on, these elements + * will fade when going between auto-animate slides. + * + * Note that parents of auto-animate targets are NOT considered + * unmatched since fading them would break the auto-animation. + * + * @param {HTMLElement} rootElement + * @return {Array} + */ + getUnmatchedAutoAnimateElements( rootElement ) { + + return [].slice.call( rootElement.children ).reduce( ( result, element ) => { + + const containsAnimatedElements = element.querySelector( '[data-auto-animate-target]' ); + + // The element is unmatched if + // - It is not an auto-animate target + // - It does not contain any auto-animate targets + if( !element.hasAttribute( 'data-auto-animate-target' ) && !containsAnimatedElements ) { + result.push( element ); + } + + if( element.querySelector( '[data-auto-animate-target]' ) ) { + result = result.concat( this.getUnmatchedAutoAnimateElements( element ) ); + } + + return result; + + }, [] ); + + } + +} diff --git a/present/js/controllers/backgrounds.js b/present/js/controllers/backgrounds.js new file mode 100644 index 0000000..f906269 --- /dev/null +++ b/present/js/controllers/backgrounds.js @@ -0,0 +1,406 @@ +import { queryAll } from '../utils/util.js' +import { colorToRgb, colorBrightness } from '../utils/color.js' + +/** + * Creates and updates slide backgrounds. + */ +export default class Backgrounds { + + constructor( Reveal ) { + + this.Reveal = Reveal; + + } + + render() { + + this.element = document.createElement( 'div' ); + this.element.className = 'backgrounds'; + this.Reveal.getRevealElement().appendChild( this.element ); + + } + + /** + * 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. + */ + create() { + + // Clear prior backgrounds + this.element.innerHTML = ''; + this.element.classList.add( 'no-transition' ); + + // Iterate over all horizontal slides + this.Reveal.getHorizontalSlides().forEach( slideh => { + + let backgroundStack = this.createBackground( slideh, this.element ); + + // Iterate over all vertical slides + queryAll( slideh, 'section' ).forEach( slidev => { + + this.createBackground( slidev, backgroundStack ); + + backgroundStack.classList.add( 'stack' ); + + } ); + + } ); + + // Add parallax background if specified + if( this.Reveal.getConfig().parallaxBackgroundImage ) { + + this.element.style.backgroundImage = 'url("' + this.Reveal.getConfig().parallaxBackgroundImage + '")'; + this.element.style.backgroundSize = this.Reveal.getConfig().parallaxBackgroundSize; + this.element.style.backgroundRepeat = this.Reveal.getConfig().parallaxBackgroundRepeat; + this.element.style.backgroundPosition = this.Reveal.getConfig().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( () => { + this.Reveal.getRevealElement().classList.add( 'has-parallax-background' ); + }, 1 ); + + } + else { + + this.element.style.backgroundImage = ''; + this.Reveal.getRevealElement().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 + */ + createBackground( slide, container ) { + + // Main slide background element + let element = document.createElement( 'div' ); + element.className = 'slide-background ' + slide.className.replace( /present|past|future/, '' ); + + // Inner background element that wraps images/videos/iframes + let 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 + this.sync( slide ); + + return element; + + } + + /** + * Renders all of the visual properties of a slide background + * based on the various background attributes. + * + * @param {HTMLElement} slide + */ + sync( slide ) { + + const element = slide.slideBackgroundElement, + contentElement = slide.slideBackgroundContentElement; + + const 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' ), + backgroundGradient: slide.getAttribute( 'data-background-gradient' ), + backgroundRepeat: slide.getAttribute( 'data-background-repeat' ), + backgroundPosition: slide.getAttribute( 'data-background-position' ), + backgroundTransition: slide.getAttribute( 'data-background-transition' ), + backgroundOpacity: slide.getAttribute( 'data-background-opacity' ), + }; + + const dataPreload = slide.hasAttribute( 'data-preload' ); + + // 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 = ''; + + if( data.background ) { + // Auto-wrap image urls in url(...) + if( /^(http|file|\/\/)/gi.test( data.background ) || /\.(svg|png|jpg|jpeg|gif|bmp|webp)([?#\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.backgroundGradient || data.backgroundImage || data.backgroundVideo || data.backgroundIframe ) { + element.setAttribute( 'data-background-hash', data.background + + data.backgroundSize + + data.backgroundImage + + data.backgroundVideo + + data.backgroundIframe + + data.backgroundColor + + data.backgroundGradient + + 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.backgroundGradient ) element.style.backgroundImage = data.backgroundGradient; + if( data.backgroundTransition ) element.setAttribute( 'data-background-transition', data.backgroundTransition ); + + if( dataPreload ) element.setAttribute( 'data-preload', '' ); + + // 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 + let contrastColor = data.backgroundColor; + + // If no bg color was found, or it cannot be converted by colorToRgb, check the computed background + if( !contrastColor || !colorToRgb( contrastColor ) ) { + let computedBackgroundStyle = window.getComputedStyle( element ); + if( computedBackgroundStyle && computedBackgroundStyle.backgroundColor ) { + contrastColor = computedBackgroundStyle.backgroundColor; + } + } + + if( contrastColor ) { + const 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' ); + } + } + } + + } + + /** + * 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. + */ + update( includeAll = false ) { + + let currentSlide = this.Reveal.getCurrentSlide(); + let indices = this.Reveal.getIndices(); + + let currentBackground = null; + + // Reverse past/future classes when in RTL mode + let horizontalPast = this.Reveal.getConfig().rtl ? 'future' : 'past', + horizontalFuture = this.Reveal.getConfig().rtl ? 'past' : 'future'; + + // Update the classes of all backgrounds to match the + // states of their slides (past/present/future) + Array.from( this.element.childNodes ).forEach( ( backgroundh, h ) => { + + backgroundh.classList.remove( 'past', 'present', 'future' ); + + if( h < indices.h ) { + backgroundh.classList.add( horizontalPast ); + } + else if ( h > indices.h ) { + backgroundh.classList.add( horizontalFuture ); + } + else { + backgroundh.classList.add( 'present' ); + + // Store a reference to the current background element + currentBackground = backgroundh; + } + + if( includeAll || h === indices.h ) { + queryAll( backgroundh, '.slide-background' ).forEach( ( backgroundv, v ) => { + + backgroundv.classList.remove( 'past', 'present', 'future' ); + + if( v < indices.v ) { + backgroundv.classList.add( 'past' ); + } + else if ( v > indices.v ) { + backgroundv.classList.add( 'future' ); + } + else { + backgroundv.classList.add( 'present' ); + + // Only if this is the present horizontal and vertical slide + if( h === indices.h ) currentBackground = backgroundv; + } + + } ); + } + + } ); + + // Stop content inside of previous backgrounds + if( this.previousBackground ) { + + this.Reveal.slideContent.stopEmbeddedContent( this.previousBackground, { unloadIframes: !this.Reveal.slideContent.shouldPreload( this.previousBackground ) } ); + + } + + // Start content in the current background + if( currentBackground ) { + + this.Reveal.slideContent.startEmbeddedContent( currentBackground ); + + let currentBackgroundContent = currentBackground.querySelector( '.slide-background-content' ); + if( currentBackgroundContent ) { + + let 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. + let previousBackgroundHash = this.previousBackground ? this.previousBackground.getAttribute( 'data-background-hash' ) : null; + let currentBackgroundHash = currentBackground.getAttribute( 'data-background-hash' ); + if( currentBackgroundHash && currentBackgroundHash === previousBackgroundHash && currentBackground !== this.previousBackground ) { + this.element.classList.add( 'no-transition' ); + } + + this.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( classToBubble => { + if( currentSlide.classList.contains( classToBubble ) ) { + this.Reveal.getRevealElement().classList.add( classToBubble ); + } + else { + this.Reveal.getRevealElement().classList.remove( classToBubble ); + } + }, this ); + } + + // Allow the first background to apply without transition + setTimeout( () => { + this.element.classList.remove( 'no-transition' ); + }, 1 ); + + } + + /** + * Updates the position of the parallax background based + * on the current slide index. + */ + updateParallax() { + + let indices = this.Reveal.getIndices(); + + if( this.Reveal.getConfig().parallaxBackgroundImage ) { + + let horizontalSlides = this.Reveal.getHorizontalSlides(), + verticalSlides = this.Reveal.getVerticalSlides(); + + let backgroundSize = this.element.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 ); + } + + let slideWidth = this.element.offsetWidth, + horizontalSlideCount = horizontalSlides.length, + horizontalOffsetMultiplier, + horizontalOffset; + + if( typeof this.Reveal.getConfig().parallaxBackgroundHorizontal === 'number' ) { + horizontalOffsetMultiplier = this.Reveal.getConfig().parallaxBackgroundHorizontal; + } + else { + horizontalOffsetMultiplier = horizontalSlideCount > 1 ? ( backgroundWidth - slideWidth ) / ( horizontalSlideCount-1 ) : 0; + } + + horizontalOffset = horizontalOffsetMultiplier * indices.h * -1; + + let slideHeight = this.element.offsetHeight, + verticalSlideCount = verticalSlides.length, + verticalOffsetMultiplier, + verticalOffset; + + if( typeof this.Reveal.getConfig().parallaxBackgroundVertical === 'number' ) { + verticalOffsetMultiplier = this.Reveal.getConfig().parallaxBackgroundVertical; + } + else { + verticalOffsetMultiplier = ( backgroundHeight - slideHeight ) / ( verticalSlideCount-1 ); + } + + verticalOffset = verticalSlideCount > 0 ? verticalOffsetMultiplier * indices.v : 0; + + this.element.style.backgroundPosition = horizontalOffset + 'px ' + -verticalOffset + 'px'; + + } + + } + + destroy() { + + this.element.remove(); + + } + +} diff --git a/present/js/controllers/controls.js b/present/js/controllers/controls.js new file mode 100644 index 0000000..734eb17 --- /dev/null +++ b/present/js/controllers/controls.js @@ -0,0 +1,266 @@ +import { queryAll } from '../utils/util.js' +import { isAndroid } from '../utils/device.js' + +/** + * Manages our presentation controls. This includes both + * the built-in control arrows as well as event monitoring + * of any elements within the presentation with either of the + * following helper classes: + * - .navigate-up + * - .navigate-right + * - .navigate-down + * - .navigate-left + * - .navigate-next + * - .navigate-prev + */ +export default class Controls { + + constructor( Reveal ) { + + this.Reveal = Reveal; + + this.onNavigateLeftClicked = this.onNavigateLeftClicked.bind( this ); + this.onNavigateRightClicked = this.onNavigateRightClicked.bind( this ); + this.onNavigateUpClicked = this.onNavigateUpClicked.bind( this ); + this.onNavigateDownClicked = this.onNavigateDownClicked.bind( this ); + this.onNavigatePrevClicked = this.onNavigatePrevClicked.bind( this ); + this.onNavigateNextClicked = this.onNavigateNextClicked.bind( this ); + + } + + render() { + + const rtl = this.Reveal.getConfig().rtl; + const revealElement = this.Reveal.getRevealElement(); + + this.element = document.createElement( 'aside' ); + this.element.className = 'controls'; + this.element.innerHTML = + `<button class="navigate-left" aria-label="${ rtl ? 'next slide' : 'previous slide' }"><div class="controls-arrow"></div></button> + <button class="navigate-right" aria-label="${ rtl ? 'previous slide' : '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>`; + + this.Reveal.getRevealElement().appendChild( this.element ); + + // There can be multiple instances of controls throughout the page + this.controlsLeft = queryAll( revealElement, '.navigate-left' ); + this.controlsRight = queryAll( revealElement, '.navigate-right' ); + this.controlsUp = queryAll( revealElement, '.navigate-up' ); + this.controlsDown = queryAll( revealElement, '.navigate-down' ); + this.controlsPrev = queryAll( revealElement, '.navigate-prev' ); + this.controlsNext = queryAll( revealElement, '.navigate-next' ); + + // The left, right and down arrows in the standard reveal.js controls + this.controlsRightArrow = this.element.querySelector( '.navigate-right' ); + this.controlsLeftArrow = this.element.querySelector( '.navigate-left' ); + this.controlsDownArrow = this.element.querySelector( '.navigate-down' ); + + } + + /** + * Called when the reveal.js config is updated. + */ + configure( config, oldConfig ) { + + this.element.style.display = config.controls ? 'block' : 'none'; + + this.element.setAttribute( 'data-controls-layout', config.controlsLayout ); + this.element.setAttribute( 'data-controls-back-arrows', config.controlsBackArrows ); + + } + + bind() { + + // Listen to both touch and click events, in case the device + // supports both + let pointerEvents = [ 'touchstart', 'click' ]; + + // Only support touch for Android, fixes double navigations in + // stock browser + if( isAndroid ) { + pointerEvents = [ 'touchstart' ]; + } + + pointerEvents.forEach( eventName => { + this.controlsLeft.forEach( el => el.addEventListener( eventName, this.onNavigateLeftClicked, false ) ); + this.controlsRight.forEach( el => el.addEventListener( eventName, this.onNavigateRightClicked, false ) ); + this.controlsUp.forEach( el => el.addEventListener( eventName, this.onNavigateUpClicked, false ) ); + this.controlsDown.forEach( el => el.addEventListener( eventName, this.onNavigateDownClicked, false ) ); + this.controlsPrev.forEach( el => el.addEventListener( eventName, this.onNavigatePrevClicked, false ) ); + this.controlsNext.forEach( el => el.addEventListener( eventName, this.onNavigateNextClicked, false ) ); + } ); + + } + + unbind() { + + [ 'touchstart', 'click' ].forEach( eventName => { + this.controlsLeft.forEach( el => el.removeEventListener( eventName, this.onNavigateLeftClicked, false ) ); + this.controlsRight.forEach( el => el.removeEventListener( eventName, this.onNavigateRightClicked, false ) ); + this.controlsUp.forEach( el => el.removeEventListener( eventName, this.onNavigateUpClicked, false ) ); + this.controlsDown.forEach( el => el.removeEventListener( eventName, this.onNavigateDownClicked, false ) ); + this.controlsPrev.forEach( el => el.removeEventListener( eventName, this.onNavigatePrevClicked, false ) ); + this.controlsNext.forEach( el => el.removeEventListener( eventName, this.onNavigateNextClicked, false ) ); + } ); + + } + + /** + * Updates the state of all control/navigation arrows. + */ + update() { + + let routes = this.Reveal.availableRoutes(); + + // Remove the 'enabled' class from all directions + [...this.controlsLeft, ...this.controlsRight, ...this.controlsUp, ...this.controlsDown, ...this.controlsPrev, ...this.controlsNext].forEach( node => { + node.classList.remove( 'enabled', '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 ) this.controlsLeft.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } ); + if( routes.right ) this.controlsRight.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } ); + if( routes.up ) this.controlsUp.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } ); + if( routes.down ) this.controlsDown.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } ); + + // Prev/next buttons + if( routes.left || routes.up ) this.controlsPrev.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } ); + if( routes.right || routes.down ) this.controlsNext.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } ); + + // Highlight fragment directions + let currentSlide = this.Reveal.getCurrentSlide(); + if( currentSlide ) { + + let fragmentsRoutes = this.Reveal.fragments.availableRoutes(); + + // Always apply fragment decorator to prev/next buttons + if( fragmentsRoutes.prev ) this.controlsPrev.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } ); + if( fragmentsRoutes.next ) this.controlsNext.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } ); + + // Apply fragment decorators to directional buttons based on + // what slide axis they are in + if( this.Reveal.isVerticalSlide( currentSlide ) ) { + if( fragmentsRoutes.prev ) this.controlsUp.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } ); + if( fragmentsRoutes.next ) this.controlsDown.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } ); + } + else { + if( fragmentsRoutes.prev ) this.controlsLeft.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } ); + if( fragmentsRoutes.next ) this.controlsRight.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } ); + } + + } + + if( this.Reveal.getConfig().controlsTutorial ) { + + let indices = this.Reveal.getIndices(); + + // Highlight control arrows with an animation to ensure + // that the viewer knows how to navigate + if( !this.Reveal.hasNavigatedVertically() && routes.down ) { + this.controlsDownArrow.classList.add( 'highlight' ); + } + else { + this.controlsDownArrow.classList.remove( 'highlight' ); + + if( this.Reveal.getConfig().rtl ) { + + if( !this.Reveal.hasNavigatedHorizontally() && routes.left && indices.v === 0 ) { + this.controlsLeftArrow.classList.add( 'highlight' ); + } + else { + this.controlsLeftArrow.classList.remove( 'highlight' ); + } + + } else { + + if( !this.Reveal.hasNavigatedHorizontally() && routes.right && indices.v === 0 ) { + this.controlsRightArrow.classList.add( 'highlight' ); + } + else { + this.controlsRightArrow.classList.remove( 'highlight' ); + } + } + } + } + } + + destroy() { + + this.unbind(); + this.element.remove(); + + } + + /** + * Event handlers for navigation control buttons. + */ + onNavigateLeftClicked( event ) { + + event.preventDefault(); + this.Reveal.onUserInput(); + + if( this.Reveal.getConfig().navigationMode === 'linear' ) { + this.Reveal.prev(); + } + else { + this.Reveal.left(); + } + + } + + onNavigateRightClicked( event ) { + + event.preventDefault(); + this.Reveal.onUserInput(); + + if( this.Reveal.getConfig().navigationMode === 'linear' ) { + this.Reveal.next(); + } + else { + this.Reveal.right(); + } + + } + + onNavigateUpClicked( event ) { + + event.preventDefault(); + this.Reveal.onUserInput(); + + this.Reveal.up(); + + } + + onNavigateDownClicked( event ) { + + event.preventDefault(); + this.Reveal.onUserInput(); + + this.Reveal.down(); + + } + + onNavigatePrevClicked( event ) { + + event.preventDefault(); + this.Reveal.onUserInput(); + + this.Reveal.prev(); + + } + + onNavigateNextClicked( event ) { + + event.preventDefault(); + this.Reveal.onUserInput(); + + this.Reveal.next(); + + } + + +}
\ No newline at end of file diff --git a/present/js/controllers/focus.js b/present/js/controllers/focus.js new file mode 100644 index 0000000..3e68c3f --- /dev/null +++ b/present/js/controllers/focus.js @@ -0,0 +1,103 @@ +import { closest } from '../utils/util.js' + +/** + * Manages focus when a presentation is embedded. This + * helps us only capture keyboard from the presentation + * a user is currently interacting with in a page where + * multiple presentations are embedded. + */ + +const STATE_FOCUS = 'focus'; +const STATE_BLUR = 'blur'; + +export default class Focus { + + constructor( Reveal ) { + + this.Reveal = Reveal; + + this.onRevealPointerDown = this.onRevealPointerDown.bind( this ); + this.onDocumentPointerDown = this.onDocumentPointerDown.bind( this ); + + } + + /** + * Called when the reveal.js config is updated. + */ + configure( config, oldConfig ) { + + if( config.embedded ) { + this.blur(); + } + else { + this.focus(); + this.unbind(); + } + + } + + bind() { + + if( this.Reveal.getConfig().embedded ) { + this.Reveal.getRevealElement().addEventListener( 'pointerdown', this.onRevealPointerDown, false ); + } + + } + + unbind() { + + this.Reveal.getRevealElement().removeEventListener( 'pointerdown', this.onRevealPointerDown, false ); + document.removeEventListener( 'pointerdown', this.onDocumentPointerDown, false ); + + } + + focus() { + + if( this.state !== STATE_FOCUS ) { + this.Reveal.getRevealElement().classList.add( 'focused' ); + document.addEventListener( 'pointerdown', this.onDocumentPointerDown, false ); + } + + this.state = STATE_FOCUS; + + } + + blur() { + + if( this.state !== STATE_BLUR ) { + this.Reveal.getRevealElement().classList.remove( 'focused' ); + document.removeEventListener( 'pointerdown', this.onDocumentPointerDown, false ); + } + + this.state = STATE_BLUR; + + } + + isFocused() { + + return this.state === STATE_FOCUS; + + } + + destroy() { + + this.Reveal.getRevealElement().classList.remove( 'focused' ); + + } + + onRevealPointerDown( event ) { + + this.focus(); + + } + + onDocumentPointerDown( event ) { + + let revealElement = closest( event.target, '.reveal' ); + if( !revealElement || revealElement !== this.Reveal.getRevealElement() ) { + this.blur(); + } + + } + +}
\ No newline at end of file diff --git a/present/js/controllers/fragments.js b/present/js/controllers/fragments.js new file mode 100644 index 0000000..796c168 --- /dev/null +++ b/present/js/controllers/fragments.js @@ -0,0 +1,376 @@ +import { extend, queryAll } from '../utils/util.js' + +/** + * Handles sorting and navigation of slide fragments. + * Fragments are elements within a slide that are + * revealed/animated incrementally. + */ +export default class Fragments { + + constructor( Reveal ) { + + this.Reveal = Reveal; + + } + + /** + * Called when the reveal.js config is updated. + */ + configure( config, oldConfig ) { + + if( config.fragments === false ) { + this.disable(); + } + else if( oldConfig.fragments === false ) { + this.enable(); + } + + } + + /** + * If fragments are disabled in the deck, they should all be + * visible rather than stepped through. + */ + disable() { + + queryAll( this.Reveal.getSlidesElement(), '.fragment' ).forEach( element => { + element.classList.add( 'visible' ); + element.classList.remove( 'current-fragment' ); + } ); + + } + + /** + * Reverse of #disable(). Only called if fragments have + * previously been disabled. + */ + enable() { + + queryAll( this.Reveal.getSlidesElement(), '.fragment' ).forEach( element => { + element.classList.remove( 'visible' ); + element.classList.remove( 'current-fragment' ); + } ); + + } + + /** + * Returns an object describing the available fragment + * directions. + * + * @return {{prev: boolean, next: boolean}} + */ + availableRoutes() { + + let currentSlide = this.Reveal.getCurrentSlide(); + if( currentSlide && this.Reveal.getConfig().fragments ) { + let fragments = currentSlide.querySelectorAll( '.fragment:not(.disabled)' ); + let hiddenFragments = currentSlide.querySelectorAll( '.fragment:not(.disabled):not(.visible)' ); + + return { + prev: fragments.length - hiddenFragments.length > 0, + next: !!hiddenFragments.length + }; + } + else { + return { prev: false, next: false }; + } + + } + + /** + * 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 + */ + sort( fragments, grouped = false ) { + + fragments = Array.from( fragments ); + + let ordered = [], + unordered = [], + sorted = []; + + // Group ordered and unordered elements + fragments.forEach( fragment => { + if( fragment.hasAttribute( 'data-fragment-index' ) ) { + let 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 + let index = 0; + + // Push all fragments in their sorted order to an array, + // this flattens the groups + ordered.forEach( group => { + group.forEach( fragment => { + sorted.push( fragment ); + fragment.setAttribute( 'data-fragment-index', index ); + } ); + + index ++; + } ); + + return grouped === true ? ordered : sorted; + + } + + /** + * Sorts and formats all of fragments in the + * presentation. + */ + sortAll() { + + this.Reveal.getHorizontalSlides().forEach( horizontalSlide => { + + let verticalSlides = queryAll( horizontalSlide, 'section' ); + verticalSlides.forEach( ( verticalSlide, y ) => { + + this.sort( verticalSlide.querySelectorAll( '.fragment' ) ); + + }, this ); + + if( verticalSlides.length === 0 ) this.sort( horizontalSlide.querySelectorAll( '.fragment' ) ); + + } ); + + } + + /** + * 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}} + */ + update( index, fragments ) { + + let changedFragments = { + shown: [], + hidden: [] + }; + + let currentSlide = this.Reveal.getCurrentSlide(); + if( currentSlide && this.Reveal.getConfig().fragments ) { + + fragments = fragments || this.sort( currentSlide.querySelectorAll( '.fragment' ) ); + + if( fragments.length ) { + + let maxIndex = 0; + + if( typeof index !== 'number' ) { + let currentFragment = this.sort( currentSlide.querySelectorAll( '.fragment.visible' ) ).pop(); + if( currentFragment ) { + index = parseInt( currentFragment.getAttribute( 'data-fragment-index' ) || 0, 10 ); + } + } + + Array.from( fragments ).forEach( ( el, i ) => { + + if( el.hasAttribute( 'data-fragment-index' ) ) { + i = parseInt( el.getAttribute( 'data-fragment-index' ), 10 ); + } + + maxIndex = Math.max( maxIndex, i ); + + // Visible fragments + if( i <= index ) { + let wasVisible = el.classList.contains( 'visible' ) + el.classList.add( 'visible' ); + el.classList.remove( 'current-fragment' ); + + if( i === index ) { + // Announce the fragments one by one to the Screen Reader + this.Reveal.announceStatus( this.Reveal.getStatusText( el ) ); + + el.classList.add( 'current-fragment' ); + this.Reveal.slideContent.startEmbeddedContent( el ); + } + + if( !wasVisible ) { + changedFragments.shown.push( el ) + this.Reveal.dispatchEvent({ + target: el, + type: 'visible', + bubbles: false + }); + } + } + // Hidden fragments + else { + let wasVisible = el.classList.contains( 'visible' ) + el.classList.remove( 'visible' ); + el.classList.remove( 'current-fragment' ); + + if( wasVisible ) { + this.Reveal.slideContent.stopEmbeddedContent( el ); + changedFragments.hidden.push( el ); + this.Reveal.dispatchEvent({ + target: el, + type: 'hidden', + bubbles: false + }); + } + } + + } ); + + // Write the current fragment index to the slide <section>. + // This can be used by end users to apply styles based on + // the current fragment index. + index = typeof index === 'number' ? index : -1; + index = Math.max( Math.min( index, maxIndex ), -1 ); + currentSlide.setAttribute( 'data-fragment', index ); + + } + + } + + return changedFragments; + + } + + /** + * 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 + */ + sync( slide = this.Reveal.getCurrentSlide() ) { + + return this.sort( slide.querySelectorAll( '.fragment' ) ); + + } + + /** + * 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 + */ + goto( index, offset = 0 ) { + + let currentSlide = this.Reveal.getCurrentSlide(); + if( currentSlide && this.Reveal.getConfig().fragments ) { + + let fragments = this.sort( currentSlide.querySelectorAll( '.fragment:not(.disabled)' ) ); + if( fragments.length ) { + + // If no index is specified, find the current + if( typeof index !== 'number' ) { + let lastVisibleFragment = this.sort( currentSlide.querySelectorAll( '.fragment:not(.disabled).visible' ) ).pop(); + + if( lastVisibleFragment ) { + index = parseInt( lastVisibleFragment.getAttribute( 'data-fragment-index' ) || 0, 10 ); + } + else { + index = -1; + } + } + + // Apply the offset if there is one + index += offset; + + let changedFragments = this.update( index, fragments ); + + if( changedFragments.hidden.length ) { + this.Reveal.dispatchEvent({ + type: 'fragmenthidden', + data: { + fragment: changedFragments.hidden[0], + fragments: changedFragments.hidden + } + }); + } + + if( changedFragments.shown.length ) { + this.Reveal.dispatchEvent({ + type: 'fragmentshown', + data: { + fragment: changedFragments.shown[0], + fragments: changedFragments.shown + } + }); + } + + this.Reveal.controls.update(); + this.Reveal.progress.update(); + + if( this.Reveal.getConfig().fragmentInURL ) { + this.Reveal.location.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 + */ + next() { + + return this.goto( null, 1 ); + + } + + /** + * Navigate to the previous slide fragment. + * + * @return {boolean} true if there was a previous fragment, + * false otherwise + */ + prev() { + + return this.goto( null, -1 ); + + } + +}
\ No newline at end of file diff --git a/present/js/controllers/jumptoslide.js b/present/js/controllers/jumptoslide.js new file mode 100644 index 0000000..cf2de99 --- /dev/null +++ b/present/js/controllers/jumptoslide.js @@ -0,0 +1,170 @@ +/** + * Makes it possible to jump to a slide by entering its + * slide number or id. + */ +export default class JumpToSlide { + + constructor( Reveal ) { + + this.Reveal = Reveal; + + this.onInput = this.onInput.bind( this ); + this.onBlur = this.onBlur.bind( this ); + this.onKeyDown = this.onKeyDown.bind( this ); + + } + + render() { + + this.element = document.createElement( 'div' ); + this.element.className = 'jump-to-slide'; + + this.jumpInput = document.createElement( 'input' ); + this.jumpInput.type = 'text'; + this.jumpInput.className = 'jump-to-slide-input'; + this.jumpInput.placeholder = 'Jump to slide'; + this.jumpInput.addEventListener( 'input', this.onInput ); + this.jumpInput.addEventListener( 'keydown', this.onKeyDown ); + this.jumpInput.addEventListener( 'blur', this.onBlur ); + + this.element.appendChild( this.jumpInput ); + + } + + show() { + + this.indicesOnShow = this.Reveal.getIndices(); + + this.Reveal.getRevealElement().appendChild( this.element ); + this.jumpInput.focus(); + + } + + hide() { + + if( this.isVisible() ) { + this.element.remove(); + this.jumpInput.value = ''; + + clearTimeout( this.jumpTimeout ); + delete this.jumpTimeout; + } + + } + + isVisible() { + + return !!this.element.parentNode; + + } + + /** + * Parses the current input and jumps to the given slide. + */ + jump() { + + clearTimeout( this.jumpTimeout ); + delete this.jumpTimeout; + + const query = this.jumpInput.value.trim( '' ); + let indices = this.Reveal.location.getIndicesFromHash( query, { oneBasedIndex: true } ); + + // If no valid index was found and the input query is a + // string, fall back on a simple search + if( !indices && /\S+/i.test( query ) && query.length > 1 ) { + indices = this.search( query ); + } + + if( indices && query !== '' ) { + this.Reveal.slide( indices.h, indices.v, indices.f ); + return true; + } + else { + this.Reveal.slide( this.indicesOnShow.h, this.indicesOnShow.v, this.indicesOnShow.f ); + return false; + } + + } + + jumpAfter( delay ) { + + clearTimeout( this.jumpTimeout ); + this.jumpTimeout = setTimeout( () => this.jump(), delay ); + + } + + /** + * A lofi search that looks for the given query in all + * of our slides and returns the first match. + */ + search( query ) { + + const regex = new RegExp( '\\b' + query.trim() + '\\b', 'i' ); + + const slide = this.Reveal.getSlides().find( ( slide ) => { + return regex.test( slide.innerText ); + } ); + + if( slide ) { + return this.Reveal.getIndices( slide ); + } + else { + return null; + } + + } + + /** + * Reverts back to the slide we were on when jump to slide was + * invoked. + */ + cancel() { + + this.Reveal.slide( this.indicesOnShow.h, this.indicesOnShow.v, this.indicesOnShow.f ); + this.hide(); + + } + + confirm() { + + this.jump(); + this.hide(); + + } + + destroy() { + + this.jumpInput.removeEventListener( 'input', this.onInput ); + this.jumpInput.removeEventListener( 'keydown', this.onKeyDown ); + this.jumpInput.removeEventListener( 'blur', this.onBlur ); + + this.element.remove(); + + } + + onKeyDown( event ) { + + if( event.keyCode === 13 ) { + this.confirm(); + } + else if( event.keyCode === 27 ) { + this.cancel(); + + event.stopImmediatePropagation(); + } + + } + + onInput( event ) { + + this.jumpAfter( 200 ); + + } + + onBlur() { + + setTimeout( () => this.hide(), 1 ); + + } + +}
\ No newline at end of file diff --git a/present/js/controllers/keyboard.js b/present/js/controllers/keyboard.js new file mode 100644 index 0000000..e3bff7a --- /dev/null +++ b/present/js/controllers/keyboard.js @@ -0,0 +1,399 @@ +import { enterFullscreen } from '../utils/util.js' + +/** + * Handles all reveal.js keyboard interactions. + */ +export default class Keyboard { + + constructor( Reveal ) { + + this.Reveal = Reveal; + + // A key:value map of keyboard keys and descriptions of + // the actions they trigger + this.shortcuts = {}; + + // Holds custom key code mappings + this.bindings = {}; + + this.onDocumentKeyDown = this.onDocumentKeyDown.bind( this ); + this.onDocumentKeyPress = this.onDocumentKeyPress.bind( this ); + + } + + /** + * Called when the reveal.js config is updated. + */ + configure( config, oldConfig ) { + + if( config.navigationMode === 'linear' ) { + this.shortcuts['→ , ↓ , SPACE , N , L , J'] = 'Next slide'; + this.shortcuts['← , ↑ , P , H , K'] = 'Previous slide'; + } + else { + this.shortcuts['N , SPACE'] = 'Next slide'; + this.shortcuts['P , Shift SPACE'] = 'Previous slide'; + this.shortcuts['← , H'] = 'Navigate left'; + this.shortcuts['→ , L'] = 'Navigate right'; + this.shortcuts['↑ , K'] = 'Navigate up'; + this.shortcuts['↓ , J'] = 'Navigate down'; + } + + this.shortcuts['Alt + ←/↑/→/↓'] = 'Navigate without fragments'; + this.shortcuts['Shift + ←/↑/→/↓'] = 'Jump to first/last slide'; + this.shortcuts['B , .'] = 'Pause'; + this.shortcuts['F'] = 'Fullscreen'; + this.shortcuts['G'] = 'Jump to slide'; + this.shortcuts['ESC, O'] = 'Slide overview'; + + } + + /** + * Starts listening for keyboard events. + */ + bind() { + + document.addEventListener( 'keydown', this.onDocumentKeyDown, false ); + document.addEventListener( 'keypress', this.onDocumentKeyPress, false ); + + } + + /** + * Stops listening for keyboard events. + */ + unbind() { + + document.removeEventListener( 'keydown', this.onDocumentKeyDown, false ); + document.removeEventListener( 'keypress', this.onDocumentKeyPress, false ); + + } + + /** + * Add a custom key binding with optional description to + * be added to the help screen. + */ + addKeyBinding( binding, callback ) { + + if( typeof binding === 'object' && binding.keyCode ) { + this.bindings[binding.keyCode] = { + callback: callback, + key: binding.key, + description: binding.description + }; + } + else { + this.bindings[binding] = { + callback: callback, + key: null, + description: null + }; + } + + } + + /** + * Removes the specified custom key binding. + */ + removeKeyBinding( keyCode ) { + + delete this.bindings[keyCode]; + + } + + /** + * Programmatically triggers a keyboard event + * + * @param {int} keyCode + */ + triggerKey( keyCode ) { + + this.onDocumentKeyDown( { keyCode } ); + + } + + /** + * Registers a new shortcut to include in the help overlay + * + * @param {String} key + * @param {String} value + */ + registerKeyboardShortcut( key, value ) { + + this.shortcuts[key] = value; + + } + + getShortcuts() { + + return this.shortcuts; + + } + + getBindings() { + + return this.bindings; + + } + + /** + * Handler for the document level 'keypress' event. + * + * @param {object} event + */ + onDocumentKeyPress( event ) { + + // Check if the pressed key is question mark + if( event.shiftKey && event.charCode === 63 ) { + this.Reveal.toggleHelp(); + } + + } + + /** + * Handler for the document level 'keydown' event. + * + * @param {object} event + */ + onDocumentKeyDown( event ) { + + let config = this.Reveal.getConfig(); + + // If there's a condition specified and it returns false, + // ignore this event + if( typeof config.keyboardCondition === 'function' && config.keyboardCondition(event) === false ) { + return true; + } + + // If keyboardCondition is set, only capture keyboard events + // for embedded decks when they are focused + if( config.keyboardCondition === 'focused' && !this.Reveal.isFocused() ) { + return true; + } + + // Shorthand + let keyCode = event.keyCode; + + // Remember if auto-sliding was paused so we can toggle it + let autoSlideWasPaused = !this.Reveal.isAutoSliding(); + + this.Reveal.onUserInput( event ); + + // Is there a focused element that could be using the keyboard? + let activeElementIsCE = document.activeElement && document.activeElement.isContentEditable === true; + let activeElementIsInput = document.activeElement && document.activeElement.tagName && /input|textarea/i.test( document.activeElement.tagName ); + let activeElementIsNotes = document.activeElement && document.activeElement.className && /speaker-notes/i.test( document.activeElement.className); + + // Whitelist certain modifiers for slide navigation shortcuts + let isNavigationKey = [32, 37, 38, 39, 40, 78, 80].indexOf( event.keyCode ) !== -1; + + // Prevent all other events when a modifier is pressed + let unusedModifier = !( isNavigationKey && event.shiftKey || event.altKey ) && + ( 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', '.' + let resumeKeyCodes = [66,86,190,191]; + let 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( this.Reveal.isPaused() && resumeKeyCodes.indexOf( keyCode ) === -1 ) { + return false; + } + + // Use linear navigation if we're configured to OR if + // the presentation is one-dimensional + let useLinearMode = config.navigationMode === 'linear' || !this.Reveal.hasHorizontalSlides() || !this.Reveal.hasVerticalSlides(); + + let 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 ) { + + let 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 this.Reveal[ value ] === 'function' ) { + this.Reveal[ value ].call(); + } + + triggered = true; + + } + + } + + } + + // 2. Registered custom key bindings + if( triggered === false ) { + + for( key in this.bindings ) { + + // Check if this binding matches the pressed key + if( parseInt( key, 10 ) === keyCode ) { + + let action = this.bindings[ key ].callback; + + // Callback function + if( typeof action === 'function' ) { + action.apply( null, [ event ] ); + } + // String shortcuts to reveal.js API + else if( typeof action === 'string' && typeof this.Reveal[ action ] === 'function' ) { + this.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 ) { + this.Reveal.prev({skipFragments: event.altKey}); + } + // N, PAGE DOWN + else if( keyCode === 78 || keyCode === 34 ) { + this.Reveal.next({skipFragments: event.altKey}); + } + // H, LEFT + else if( keyCode === 72 || keyCode === 37 ) { + if( event.shiftKey ) { + this.Reveal.slide( 0 ); + } + else if( !this.Reveal.overview.isActive() && useLinearMode ) { + this.Reveal.prev({skipFragments: event.altKey}); + } + else { + this.Reveal.left({skipFragments: event.altKey}); + } + } + // L, RIGHT + else if( keyCode === 76 || keyCode === 39 ) { + if( event.shiftKey ) { + this.Reveal.slide( this.Reveal.getHorizontalSlides().length - 1 ); + } + else if( !this.Reveal.overview.isActive() && useLinearMode ) { + this.Reveal.next({skipFragments: event.altKey}); + } + else { + this.Reveal.right({skipFragments: event.altKey}); + } + } + // K, UP + else if( keyCode === 75 || keyCode === 38 ) { + if( event.shiftKey ) { + this.Reveal.slide( undefined, 0 ); + } + else if( !this.Reveal.overview.isActive() && useLinearMode ) { + this.Reveal.prev({skipFragments: event.altKey}); + } + else { + this.Reveal.up({skipFragments: event.altKey}); + } + } + // J, DOWN + else if( keyCode === 74 || keyCode === 40 ) { + if( event.shiftKey ) { + this.Reveal.slide( undefined, Number.MAX_VALUE ); + } + else if( !this.Reveal.overview.isActive() && useLinearMode ) { + this.Reveal.next({skipFragments: event.altKey}); + } + else { + this.Reveal.down({skipFragments: event.altKey}); + } + } + // HOME + else if( keyCode === 36 ) { + this.Reveal.slide( 0 ); + } + // END + else if( keyCode === 35 ) { + this.Reveal.slide( this.Reveal.getHorizontalSlides().length - 1 ); + } + // SPACE + else if( keyCode === 32 ) { + if( this.Reveal.overview.isActive() ) { + this.Reveal.overview.deactivate(); + } + if( event.shiftKey ) { + this.Reveal.prev({skipFragments: event.altKey}); + } + else { + this.Reveal.next({skipFragments: event.altKey}); + } + } + // 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 ) { + this.Reveal.togglePause(); + } + // F + else if( keyCode === 70 ) { + enterFullscreen( config.embedded ? this.Reveal.getViewportElement() : document.documentElement ); + } + // A + else if( keyCode === 65 ) { + if ( config.autoSlideStoppable ) { + this.Reveal.toggleAutoSlide( autoSlideWasPaused ); + } + } + // G + else if( keyCode === 71 ) { + if ( config.jumpToSlide ) { + this.Reveal.toggleJumpToSlide(); + } + } + 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 ) { + if( this.Reveal.closeOverlay() === false ) { + this.Reveal.overview.toggle(); + } + + event.preventDefault && event.preventDefault(); + } + + // If auto-sliding is enabled we need to cue up + // another timeout + this.Reveal.cueAutoSlide(); + + } + +}
\ No newline at end of file diff --git a/present/js/controllers/location.js b/present/js/controllers/location.js new file mode 100644 index 0000000..6fa4829 --- /dev/null +++ b/present/js/controllers/location.js @@ -0,0 +1,245 @@ +/** + * Reads and writes the URL based on reveal.js' current state. + */ +export default class Location { + + // The minimum number of milliseconds that must pass between + // calls to history.replaceState + MAX_REPLACE_STATE_FREQUENCY = 1000 + + constructor( Reveal ) { + + this.Reveal = Reveal; + + // Delays updates to the URL due to a Chrome thumbnailer bug + this.writeURLTimeout = 0; + + this.replaceStateTimestamp = 0; + + this.onWindowHashChange = this.onWindowHashChange.bind( this ); + + } + + bind() { + + window.addEventListener( 'hashchange', this.onWindowHashChange, false ); + + } + + unbind() { + + window.removeEventListener( 'hashchange', this.onWindowHashChange, false ); + + } + + /** + * Returns the slide indices for the given hash link. + * + * @param {string} [hash] the hash string that we want to + * find the indices for + * + * @returns slide indices or null + */ + getIndicesFromHash( hash=window.location.hash, options={} ) { + + // Attempt to parse the hash as either an index or name + let name = hash.replace( /^#\/?/, '' ); + let bits = name.split( '/' ); + + // 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]*$/.test( bits[0] ) && name.length ) { + let element; + + let f; + + // Parse named links with fragments (#/named-link/2) + if( /\/[-\d]+$/g.test( name ) ) { + f = parseInt( name.split( '/' ).pop(), 10 ); + f = isNaN(f) ? undefined : f; + name = name.split( '/' ).shift(); + } + + // Ensure the named link is a valid HTML ID attribute + try { + element = document.getElementById( decodeURIComponent( name ) ); + } + catch ( error ) { } + + if( element ) { + return { ...this.Reveal.getIndices( element ), f }; + } + } + else { + const config = this.Reveal.getConfig(); + let hashIndexBase = config.hashOneBasedIndex || options.oneBasedIndex ? 1 : 0; + + // Read the index components of the hash + let 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; + } + } + + return { h, v, f }; + } + + // The hash couldn't be parsed or no matching named link was found + return null + + } + + /** + * Reads the current URL (hash) and navigates accordingly. + */ + readURL() { + + const currentIndices = this.Reveal.getIndices(); + const newIndices = this.getIndicesFromHash(); + + if( newIndices ) { + if( ( newIndices.h !== currentIndices.h || newIndices.v !== currentIndices.v || newIndices.f !== undefined ) ) { + this.Reveal.slide( newIndices.h, newIndices.v, newIndices.f ); + } + } + // If no new indices are available, we're trying to navigate to + // a slide hash that does not exist + else { + this.Reveal.slide( currentIndices.h || 0, currentIndices.v || 0 ); + } + + } + + /** + * Updates the page URL (hash) to reflect the current + * state. + * + * @param {number} delay The time in ms to wait before + * writing the hash + */ + writeURL( delay ) { + + let config = this.Reveal.getConfig(); + let currentSlide = this.Reveal.getCurrentSlide(); + + // Make sure there's never more than one timeout running + clearTimeout( this.writeURLTimeout ); + + // If a delay is specified, timeout this call + if( typeof delay === 'number' ) { + this.writeURLTimeout = setTimeout( this.writeURL, delay ); + } + else if( currentSlide ) { + + let hash = this.getHash(); + + // If we're configured to push to history OR the history + // API is not available. + if( config.history ) { + window.location.hash = hash; + } + // If we're configured to reflect the current slide in the + // URL without pushing to history. + else if( config.hash ) { + // If the hash is empty, don't add it to the URL + if( hash === '/' ) { + this.debouncedReplaceState( window.location.pathname + window.location.search ); + } + else { + this.debouncedReplaceState( '#' + hash ); + } + } + // UPDATE: The below nuking of all hash changes breaks + // anchors on pages where reveal.js is running. Removed + // in 4.0. Why was it here in the first place? ¯\_(ツ)_/¯ + // + // 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 ); + // } + + } + + } + + replaceState( url ) { + + window.history.replaceState( null, null, url ); + this.replaceStateTimestamp = Date.now(); + + } + + debouncedReplaceState( url ) { + + clearTimeout( this.replaceStateTimeout ); + + if( Date.now() - this.replaceStateTimestamp > this.MAX_REPLACE_STATE_FREQUENCY ) { + this.replaceState( url ); + } + else { + this.replaceStateTimeout = setTimeout( () => this.replaceState( url ), this.MAX_REPLACE_STATE_FREQUENCY ); + } + + } + + /** + * Return a hash URL that will resolve to the given slide location. + * + * @param {HTMLElement} [slide=currentSlide] The slide to link to + */ + getHash( slide ) { + + let url = '/'; + + // Attempt to create a named link based on the slide's ID + let s = slide || this.Reveal.getCurrentSlide(); + let id = s ? s.getAttribute( 'id' ) : null; + if( id ) { + id = encodeURIComponent( id ); + } + + let index = this.Reveal.getIndices( slide ); + if( !this.Reveal.getConfig().fragmentInURL ) { + index.f = undefined; + } + + // 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 ) { + url = '/' + id; + + // If there is also a fragment, append that at the end + // of the named link, like: #/named-link/2 + if( index.f >= 0 ) url += '/' + index.f; + } + // Otherwise use the /h/v index + else { + let hashIndexBase = this.Reveal.getConfig().hashOneBasedIndex ? 1 : 0; + if( index.h > 0 || index.v > 0 || index.f >= 0 ) url += index.h + hashIndexBase; + if( index.v > 0 || index.f >= 0 ) url += '/' + (index.v + hashIndexBase ); + if( index.f >= 0 ) url += '/' + index.f; + } + + return url; + + } + + /** + * Handler for the window level 'hashchange' event. + * + * @param {object} [event] + */ + onWindowHashChange( event ) { + + this.readURL(); + + } + +}
\ No newline at end of file diff --git a/present/js/controllers/notes.js b/present/js/controllers/notes.js new file mode 100644 index 0000000..7256425 --- /dev/null +++ b/present/js/controllers/notes.js @@ -0,0 +1,120 @@ +/** + * Handles the showing of speaker notes + */ +export default class Notes { + + constructor( Reveal ) { + + this.Reveal = Reveal; + + } + + render() { + + this.element = document.createElement( 'div' ); + this.element.className = 'speaker-notes'; + this.element.setAttribute( 'data-prevent-swipe', '' ); + this.element.setAttribute( 'tabindex', '0' ); + this.Reveal.getRevealElement().appendChild( this.element ); + + } + + /** + * Called when the reveal.js config is updated. + */ + configure( config, oldConfig ) { + + if( config.showNotes ) { + this.element.setAttribute( 'data-layout', typeof config.showNotes === 'string' ? config.showNotes : 'inline' ); + } + + } + + /** + * Pick up notes from the current slide and display them + * to the viewer. + * + * @see {@link config.showNotes} + */ + update() { + + if( this.Reveal.getConfig().showNotes && this.element && this.Reveal.getCurrentSlide() && !this.Reveal.print.isPrintingPDF() ) { + + this.element.innerHTML = this.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. + */ + updateVisibility() { + + if( this.Reveal.getConfig().showNotes && this.hasNotes() && !this.Reveal.print.isPrintingPDF() ) { + this.Reveal.getRevealElement().classList.add( 'show-notes' ); + } + else { + this.Reveal.getRevealElement().classList.remove( 'show-notes' ); + } + + } + + /** + * Checks if there are speaker notes for ANY slide in the + * presentation. + */ + hasNotes() { + + return this.Reveal.getSlidesElement().querySelectorAll( '[data-notes], aside.notes' ).length > 0; + + } + + /** + * Checks if this presentation is running inside of the + * speaker notes window. + * + * @return {boolean} + */ + isSpeakerNotesWindow() { + + return !!window.location.search.match( /receiver/gi ); + + } + + /** + * 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. With <aside class="notes"> elements inside the slide + * + * @param {HTMLElement} [slide=currentSlide] + * @return {(string|null)} + */ + getSlideNotes( slide = this.Reveal.getCurrentSlide() ) { + + // Notes can be specified via the data-notes attribute... + if( slide.hasAttribute( 'data-notes' ) ) { + return slide.getAttribute( 'data-notes' ); + } + + // ... or using <aside class="notes"> elements + let notesElements = slide.querySelectorAll( 'aside.notes' ); + if( notesElements ) { + return Array.from(notesElements).map( notesElement => notesElement.innerHTML ).join( '\n' ); + } + + return null; + + } + + destroy() { + + this.element.remove(); + + } + +}
\ No newline at end of file diff --git a/present/js/controllers/overview.js b/present/js/controllers/overview.js new file mode 100644 index 0000000..30e4c63 --- /dev/null +++ b/present/js/controllers/overview.js @@ -0,0 +1,255 @@ +import { SLIDES_SELECTOR } from '../utils/constants.js' +import { extend, queryAll, transformElement } from '../utils/util.js' + +/** + * Handles all logic related to the overview mode + * (birds-eye view of all slides). + */ +export default class Overview { + + constructor( Reveal ) { + + this.Reveal = Reveal; + + this.active = false; + + this.onSlideClicked = this.onSlideClicked.bind( this ); + + } + + /** + * Displays the overview of slides (quick nav) by scaling + * down and arranging all slide elements. + */ + activate() { + + // Only proceed if enabled in config + if( this.Reveal.getConfig().overview && !this.isActive() ) { + + this.active = true; + + this.Reveal.getRevealElement().classList.add( 'overview' ); + + // Don't auto-slide while in overview mode + this.Reveal.cancelAutoSlide(); + + // Move the backgrounds element into the slide container to + // that the same scaling is applied + this.Reveal.getSlidesElement().appendChild( this.Reveal.getBackgroundsElement() ); + + // Clicking on an overview slide navigates to it + queryAll( this.Reveal.getRevealElement(), SLIDES_SELECTOR ).forEach( slide => { + if( !slide.classList.contains( 'stack' ) ) { + slide.addEventListener( 'click', this.onSlideClicked, true ); + } + } ); + + // Calculate slide sizes + const margin = 70; + const slideSize = this.Reveal.getComputedSlideSize(); + this.overviewSlideWidth = slideSize.width + margin; + this.overviewSlideHeight = slideSize.height + margin; + + // Reverse in RTL mode + if( this.Reveal.getConfig().rtl ) { + this.overviewSlideWidth = -this.overviewSlideWidth; + } + + this.Reveal.updateSlidesVisibility(); + + this.layout(); + this.update(); + + this.Reveal.layout(); + + const indices = this.Reveal.getIndices(); + + // Notify observers of the overview showing + this.Reveal.dispatchEvent({ + type: 'overviewshown', + data: { + 'indexh': indices.h, + 'indexv': indices.v, + 'currentSlide': this.Reveal.getCurrentSlide() + } + }); + + } + + } + + /** + * Uses CSS transforms to position all slides in a grid for + * display inside of the overview mode. + */ + layout() { + + // Layout slides + this.Reveal.getHorizontalSlides().forEach( ( hslide, h ) => { + hslide.setAttribute( 'data-index-h', h ); + transformElement( hslide, 'translate3d(' + ( h * this.overviewSlideWidth ) + 'px, 0, 0)' ); + + if( hslide.classList.contains( 'stack' ) ) { + + queryAll( hslide, 'section' ).forEach( ( vslide, v ) => { + vslide.setAttribute( 'data-index-h', h ); + vslide.setAttribute( 'data-index-v', v ); + + transformElement( vslide, 'translate3d(0, ' + ( v * this.overviewSlideHeight ) + 'px, 0)' ); + } ); + + } + } ); + + // Layout slide backgrounds + Array.from( this.Reveal.getBackgroundsElement().childNodes ).forEach( ( hbackground, h ) => { + transformElement( hbackground, 'translate3d(' + ( h * this.overviewSlideWidth ) + 'px, 0, 0)' ); + + queryAll( hbackground, '.slide-background' ).forEach( ( vbackground, v ) => { + transformElement( vbackground, 'translate3d(0, ' + ( v * this.overviewSlideHeight ) + 'px, 0)' ); + } ); + } ); + + } + + /** + * Moves the overview viewport to the current slides. + * Called each time the current slide changes. + */ + update() { + + const vmin = Math.min( window.innerWidth, window.innerHeight ); + const scale = Math.max( vmin / 5, 150 ) / vmin; + const indices = this.Reveal.getIndices(); + + this.Reveal.transformSlides( { + overview: [ + 'scale('+ scale +')', + 'translateX('+ ( -indices.h * this.overviewSlideWidth ) +'px)', + 'translateY('+ ( -indices.v * this.overviewSlideHeight ) +'px)' + ].join( ' ' ) + } ); + + } + + /** + * Exits the slide overview and enters the currently + * active slide. + */ + deactivate() { + + // Only proceed if enabled in config + if( this.Reveal.getConfig().overview ) { + + this.active = false; + + this.Reveal.getRevealElement().classList.remove( 'overview' ); + + // Temporarily add a class so that transitions can do different things + // depending on whether they are exiting/entering overview, or just + // moving from slide to slide + this.Reveal.getRevealElement().classList.add( 'overview-deactivating' ); + + setTimeout( () => { + this.Reveal.getRevealElement().classList.remove( 'overview-deactivating' ); + }, 1 ); + + // Move the background element back out + this.Reveal.getRevealElement().appendChild( this.Reveal.getBackgroundsElement() ); + + // Clean up changes made to slides + queryAll( this.Reveal.getRevealElement(), SLIDES_SELECTOR ).forEach( slide => { + transformElement( slide, '' ); + + slide.removeEventListener( 'click', this.onSlideClicked, true ); + } ); + + // Clean up changes made to backgrounds + queryAll( this.Reveal.getBackgroundsElement(), '.slide-background' ).forEach( background => { + transformElement( background, '' ); + } ); + + this.Reveal.transformSlides( { overview: '' } ); + + const indices = this.Reveal.getIndices(); + + this.Reveal.slide( indices.h, indices.v ); + this.Reveal.layout(); + this.Reveal.cueAutoSlide(); + + // Notify observers of the overview hiding + this.Reveal.dispatchEvent({ + type: 'overviewhidden', + data: { + 'indexh': indices.h, + 'indexv': indices.v, + 'currentSlide': this.Reveal.getCurrentSlide() + } + }); + + } + } + + /** + * 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. + */ + toggle( override ) { + + if( typeof override === 'boolean' ) { + override ? this.activate() : this.deactivate(); + } + else { + this.isActive() ? this.deactivate() : this.activate(); + } + + } + + /** + * Checks if the overview is currently active. + * + * @return {Boolean} true if the overview is active, + * false otherwise + */ + isActive() { + + return this.active; + + } + + /** + * Invoked when a slide is and we're in the overview. + * + * @param {object} event + */ + onSlideClicked( event ) { + + if( this.isActive() ) { + event.preventDefault(); + + let element = event.target; + + while( element && !element.nodeName.match( /section/gi ) ) { + element = element.parentNode; + } + + if( element && !element.classList.contains( 'disabled' ) ) { + + this.deactivate(); + + if( element.nodeName.match( /section/gi ) ) { + let h = parseInt( element.getAttribute( 'data-index-h' ), 10 ), + v = parseInt( element.getAttribute( 'data-index-v' ), 10 ); + + this.Reveal.slide( h, v ); + } + + } + } + + } + +}
\ No newline at end of file diff --git a/present/js/controllers/plugins.js b/present/js/controllers/plugins.js new file mode 100644 index 0000000..88f57bf --- /dev/null +++ b/present/js/controllers/plugins.js @@ -0,0 +1,254 @@ +import { loadScript } from '../utils/loader.js' + +/** + * Manages loading and registering of reveal.js plugins. + */ +export default class Plugins { + + constructor( reveal ) { + + this.Reveal = reveal; + + // Flags our current state (idle -> loading -> loaded) + this.state = 'idle'; + + // An id:instance map of currently registered plugins + this.registeredPlugins = {}; + + this.asyncDependencies = []; + + } + + /** + * Loads reveal.js dependencies, registers and + * initializes plugins. + * + * Plugins are direct references to a reveal.js plugin + * object that we register and initialize after any + * synchronous dependencies have loaded. + * + * Dependencies are defined via the 'dependencies' config + * option and will be loaded prior to starting reveal.js. + * Some dependencies may have an 'async' flag, if so they + * will load after reveal.js has been started up. + */ + load( plugins, dependencies ) { + + this.state = 'loading'; + + plugins.forEach( this.registerPlugin.bind( this ) ); + + return new Promise( resolve => { + + let scripts = [], + scriptsToLoad = 0; + + dependencies.forEach( s => { + // Load if there's no condition or the condition is truthy + if( !s.condition || s.condition() ) { + if( s.async ) { + this.asyncDependencies.push( s ); + } + else { + scripts.push( s ); + } + } + } ); + + if( scripts.length ) { + scriptsToLoad = scripts.length; + + const scriptLoadedCallback = (s) => { + if( s && typeof s.callback === 'function' ) s.callback(); + + if( --scriptsToLoad === 0 ) { + this.initPlugins().then( resolve ); + } + }; + + // Load synchronous scripts + scripts.forEach( s => { + if( typeof s.id === 'string' ) { + this.registerPlugin( s ); + scriptLoadedCallback( s ); + } + else if( typeof s.src === 'string' ) { + loadScript( s.src, () => scriptLoadedCallback(s) ); + } + else { + console.warn( 'Unrecognized plugin format', s ); + scriptLoadedCallback(); + } + } ); + } + else { + this.initPlugins().then( resolve ); + } + + } ); + + } + + /** + * Initializes our plugins and waits for them to be ready + * before proceeding. + */ + initPlugins() { + + return new Promise( resolve => { + + let pluginValues = Object.values( this.registeredPlugins ); + let pluginsToInitialize = pluginValues.length; + + // If there are no plugins, skip this step + if( pluginsToInitialize === 0 ) { + this.loadAsync().then( resolve ); + } + // ... otherwise initialize plugins + else { + + let initNextPlugin; + + let afterPlugInitialized = () => { + if( --pluginsToInitialize === 0 ) { + this.loadAsync().then( resolve ); + } + else { + initNextPlugin(); + } + }; + + let i = 0; + + // Initialize plugins serially + initNextPlugin = () => { + + let plugin = pluginValues[i++]; + + // If the plugin has an 'init' method, invoke it + if( typeof plugin.init === 'function' ) { + let promise = plugin.init( this.Reveal ); + + // If the plugin returned a Promise, wait for it + if( promise && typeof promise.then === 'function' ) { + promise.then( afterPlugInitialized ); + } + else { + afterPlugInitialized(); + } + } + else { + afterPlugInitialized(); + } + + } + + initNextPlugin(); + + } + + } ) + + } + + /** + * Loads all async reveal.js dependencies. + */ + loadAsync() { + + this.state = 'loaded'; + + if( this.asyncDependencies.length ) { + this.asyncDependencies.forEach( s => { + loadScript( s.src, s.callback ); + } ); + } + + return Promise.resolve(); + + } + + /** + * Registers a new plugin with this reveal.js instance. + * + * reveal.js waits for all registered plugins to initialize + * before considering itself ready, as long as the plugin + * is registered before calling `Reveal.initialize()`. + */ + registerPlugin( plugin ) { + + // Backwards compatibility to make reveal.js ~3.9.0 + // plugins work with reveal.js 4.0.0 + if( arguments.length === 2 && typeof arguments[0] === 'string' ) { + plugin = arguments[1]; + plugin.id = arguments[0]; + } + // Plugin can optionally be a function which we call + // to create an instance of the plugin + else if( typeof plugin === 'function' ) { + plugin = plugin(); + } + + let id = plugin.id; + + if( typeof id !== 'string' ) { + console.warn( 'Unrecognized plugin format; can\'t find plugin.id', plugin ); + } + else if( this.registeredPlugins[id] === undefined ) { + this.registeredPlugins[id] = plugin; + + // If a plugin is registered after reveal.js is loaded, + // initialize it right away + if( this.state === 'loaded' && typeof plugin.init === 'function' ) { + plugin.init( this.Reveal ); + } + } + 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 + */ + hasPlugin( id ) { + + return !!this.registeredPlugins[id]; + + } + + /** + * Returns the specific plugin instance, if a plugin + * with the given ID has been registered. + * + * @param {String} id Unique plugin identifier + */ + getPlugin( id ) { + + return this.registeredPlugins[id]; + + } + + getRegisteredPlugins() { + + return this.registeredPlugins; + + } + + destroy() { + + Object.values( this.registeredPlugins ).forEach( plugin => { + if( typeof plugin.destroy === 'function' ) { + plugin.destroy(); + } + } ); + + this.registeredPlugins = {}; + this.asyncDependencies = []; + + } + +} diff --git a/present/js/controllers/pointer.js b/present/js/controllers/pointer.js new file mode 100644 index 0000000..f632fce --- /dev/null +++ b/present/js/controllers/pointer.js @@ -0,0 +1,129 @@ +/** + * Handles hiding of the pointer/cursor when inactive. + */ +export default class Pointer { + + constructor( Reveal ) { + + this.Reveal = Reveal; + + // Throttles mouse wheel navigation + this.lastMouseWheelStep = 0; + + // Is the mouse pointer currently hidden from view + this.cursorHidden = false; + + // Timeout used to determine when the cursor is inactive + this.cursorInactiveTimeout = 0; + + this.onDocumentCursorActive = this.onDocumentCursorActive.bind( this ); + this.onDocumentMouseScroll = this.onDocumentMouseScroll.bind( this ); + + } + + /** + * Called when the reveal.js config is updated. + */ + configure( config, oldConfig ) { + + if( config.mouseWheel ) { + document.addEventListener( 'DOMMouseScroll', this.onDocumentMouseScroll, false ); // FF + document.addEventListener( 'mousewheel', this.onDocumentMouseScroll, false ); + } + else { + document.removeEventListener( 'DOMMouseScroll', this.onDocumentMouseScroll, false ); // FF + document.removeEventListener( 'mousewheel', this.onDocumentMouseScroll, false ); + } + + // Auto-hide the mouse pointer when its inactive + if( config.hideInactiveCursor ) { + document.addEventListener( 'mousemove', this.onDocumentCursorActive, false ); + document.addEventListener( 'mousedown', this.onDocumentCursorActive, false ); + } + else { + this.showCursor(); + + document.removeEventListener( 'mousemove', this.onDocumentCursorActive, false ); + document.removeEventListener( 'mousedown', this.onDocumentCursorActive, false ); + } + + } + + /** + * Shows the mouse pointer after it has been hidden with + * #hideCursor. + */ + showCursor() { + + if( this.cursorHidden ) { + this.cursorHidden = false; + this.Reveal.getRevealElement().style.cursor = ''; + } + + } + + /** + * Hides the mouse pointer when it's on top of the .reveal + * container. + */ + hideCursor() { + + if( this.cursorHidden === false ) { + this.cursorHidden = true; + this.Reveal.getRevealElement().style.cursor = 'none'; + } + + } + + destroy() { + + this.showCursor(); + + document.removeEventListener( 'DOMMouseScroll', this.onDocumentMouseScroll, false ); + document.removeEventListener( 'mousewheel', this.onDocumentMouseScroll, false ); + document.removeEventListener( 'mousemove', this.onDocumentCursorActive, false ); + document.removeEventListener( 'mousedown', this.onDocumentCursorActive, false ); + + } + + /** + * Called whenever there is mouse input at the document level + * to determine if the cursor is active or not. + * + * @param {object} event + */ + onDocumentCursorActive( event ) { + + this.showCursor(); + + clearTimeout( this.cursorInactiveTimeout ); + + this.cursorInactiveTimeout = setTimeout( this.hideCursor.bind( this ), this.Reveal.getConfig().hideCursorTime ); + + } + + /** + * Handles mouse wheel scrolling, throttled to avoid skipping + * multiple slides. + * + * @param {object} event + */ + onDocumentMouseScroll( event ) { + + if( Date.now() - this.lastMouseWheelStep > 1000 ) { + + this.lastMouseWheelStep = Date.now(); + + let delta = event.detail || -event.wheelDelta; + if( delta > 0 ) { + this.Reveal.next(); + } + else if( delta < 0 ) { + this.Reveal.prev(); + } + + } + + } + +}
\ No newline at end of file diff --git a/present/js/controllers/print.js b/present/js/controllers/print.js new file mode 100644 index 0000000..4214519 --- /dev/null +++ b/present/js/controllers/print.js @@ -0,0 +1,237 @@ +import { SLIDES_SELECTOR } from '../utils/constants.js' +import { queryAll, createStyleSheet } from '../utils/util.js' + +/** + * Setups up our presentation for printing/exporting to PDF. + */ +export default class Print { + + constructor( Reveal ) { + + this.Reveal = Reveal; + + } + + /** + * Configures the presentation for printing to a static + * PDF. + */ + async setupPDF() { + + const config = this.Reveal.getConfig(); + const slides = queryAll( this.Reveal.getRevealElement(), SLIDES_SELECTOR ) + + // Compute slide numbers now, before we start duplicating slides + const injectPageNumbers = config.slideNumber && /all|print/i.test( config.showSlideNumber ); + + const slideSize = this.Reveal.getComputedSlideSize( window.innerWidth, window.innerHeight ); + + // Dimensions of the PDF pages + const pageWidth = Math.floor( slideSize.width * ( 1 + config.margin ) ), + pageHeight = Math.floor( slideSize.height * ( 1 + config.margin ) ); + + // Dimensions of slides within the pages + const slideWidth = slideSize.width, + slideHeight = slideSize.height; + + await new Promise( requestAnimationFrame ); + + // Let the browser know what page size we want to print + createStyleSheet( '@page{size:'+ pageWidth +'px '+ pageHeight +'px; margin: 0px;}' ); + + // Limit the size of certain elements to the dimensions of the slide + createStyleSheet( '.reveal section>img, .reveal section>video, .reveal section>iframe{max-width: '+ slideWidth +'px; max-height:'+ slideHeight +'px}' ); + + document.documentElement.classList.add( 'print-pdf' ); + document.body.style.width = pageWidth + 'px'; + document.body.style.height = pageHeight + 'px'; + + const viewportElement = document.querySelector( '.reveal-viewport' ); + let presentationBackground; + if( viewportElement ) { + const viewportStyles = window.getComputedStyle( viewportElement ); + if( viewportStyles && viewportStyles.background ) { + presentationBackground = viewportStyles.background; + } + } + + // Make sure stretch elements fit on slide + await new Promise( requestAnimationFrame ); + this.Reveal.layoutSlideContents( slideWidth, slideHeight ); + + // Batch scrollHeight access to prevent layout thrashing + await new Promise( requestAnimationFrame ); + + const slideScrollHeights = slides.map( slide => slide.scrollHeight ); + + const pages = []; + const pageContainer = slides[0].parentNode; + let slideNumber = 1; + + // Slide and slide background layout + slides.forEach( function( slide, index ) { + + // 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 + let left = ( pageWidth - slideWidth ) / 2; + let top = ( pageHeight - slideHeight ) / 2; + + const contentHeight = slideScrollHeights[ index ]; + let 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 + const page = document.createElement( 'div' ); + pages.push( page ); + + page.className = 'pdf-page'; + page.style.height = ( ( pageHeight + config.pdfPageHeightOffset ) * numberOfPages ) + 'px'; + + // Copy the presentation-wide background to each individual + // page when printing + if( presentationBackground ) { + page.style.background = presentationBackground; + } + + 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'; + + this.Reveal.slideContent.layout( slide ); + + if( slide.slideBackgroundElement ) { + page.insertBefore( slide.slideBackgroundElement, slide ); + } + + // Inject notes if `showNotes` is enabled + if( config.showNotes ) { + + // Are there notes for this slide? + const notes = this.Reveal.getSlideNotes( slide ); + if( notes ) { + + const notesSpacing = 8; + const notesLayout = typeof config.showNotes === 'string' ? config.showNotes : 'inline'; + const 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' ) { + pages.push( notesElement ); + } + else { + notesElement.style.left = notesSpacing + 'px'; + notesElement.style.bottom = notesSpacing + 'px'; + notesElement.style.width = ( pageWidth - notesSpacing*2 ) + 'px'; + page.appendChild( notesElement ); + } + + } + + } + + // Inject page numbers if `slideNumbers` are enabled + if( injectPageNumbers ) { + const numberElement = document.createElement( 'div' ); + numberElement.classList.add( 'slide-number' ); + numberElement.classList.add( 'slide-number-pdf' ); + numberElement.innerHTML = slideNumber++; + 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. + const fragmentGroups = this.Reveal.fragments.sort( page.querySelectorAll( '.fragment' ), true ); + + let previousFragmentStep; + + fragmentGroups.forEach( function( fragments, index ) { + + // 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' ); + }, this ); + + // Create a separate page for the current fragment state + const clonedPage = page.cloneNode( true ); + + // Inject unique page numbers for fragments + if( injectPageNumbers ) { + const numberElement = clonedPage.querySelector( '.slide-number-pdf' ); + const fragmentNumber = index + 1; + numberElement.innerHTML += '.' + fragmentNumber; + } + + pages.push( clonedPage ); + + previousFragmentStep = fragments; + + }, this ); + + // 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 { + queryAll( page, '.fragment:not(.fade-out)' ).forEach( function( fragment ) { + fragment.classList.add( 'visible' ); + } ); + } + + } + + }, this ); + + await new Promise( requestAnimationFrame ); + + pages.forEach( page => pageContainer.appendChild( page ) ); + + // Re-run JS-based content layout after the slide is added to page DOM + this.Reveal.slideContent.layout( this.Reveal.getSlidesElement() ); + + // Notify subscribers that the PDF layout is good to go + this.Reveal.dispatchEvent({ type: 'pdf-ready' }); + + } + + /** + * Checks if this instance is being used to print a PDF. + */ + isPrintingPDF() { + + return ( /print-pdf/gi ).test( window.location.search ); + + } + +} diff --git a/present/js/controllers/progress.js b/present/js/controllers/progress.js new file mode 100644 index 0000000..87e2aaf --- /dev/null +++ b/present/js/controllers/progress.js @@ -0,0 +1,110 @@ +/** + * Creates a visual progress bar for the presentation. + */ +export default class Progress { + + constructor( Reveal ) { + + this.Reveal = Reveal; + + this.onProgressClicked = this.onProgressClicked.bind( this ); + + } + + render() { + + this.element = document.createElement( 'div' ); + this.element.className = 'progress'; + this.Reveal.getRevealElement().appendChild( this.element ); + + this.bar = document.createElement( 'span' ); + this.element.appendChild( this.bar ); + + } + + /** + * Called when the reveal.js config is updated. + */ + configure( config, oldConfig ) { + + this.element.style.display = config.progress ? 'block' : 'none'; + + } + + bind() { + + if( this.Reveal.getConfig().progress && this.element ) { + this.element.addEventListener( 'click', this.onProgressClicked, false ); + } + + } + + unbind() { + + if ( this.Reveal.getConfig().progress && this.element ) { + this.element.removeEventListener( 'click', this.onProgressClicked, false ); + } + + } + + /** + * Updates the progress bar to reflect the current slide. + */ + update() { + + // Update progress if enabled + if( this.Reveal.getConfig().progress && this.bar ) { + + let scale = this.Reveal.getProgress(); + + // Don't fill the progress bar if there's only one slide + if( this.Reveal.getTotalSlides() < 2 ) { + scale = 0; + } + + this.bar.style.transform = 'scaleX('+ scale +')'; + + } + + } + + getMaxWidth() { + + return this.Reveal.getRevealElement().offsetWidth; + + } + + /** + * Clicking on the progress bar results in a navigation to the + * closest approximate horizontal slide using this equation: + * + * ( clickX / presentationWidth ) * numberOfSlides + * + * @param {object} event + */ + onProgressClicked( event ) { + + this.Reveal.onUserInput( event ); + + event.preventDefault(); + + let slides = this.Reveal.getSlides(); + let slidesTotal = slides.length; + let slideIndex = Math.floor( ( event.clientX / this.getMaxWidth() ) * slidesTotal ); + + if( this.Reveal.getConfig().rtl ) { + slideIndex = slidesTotal - slideIndex; + } + + let targetIndices = this.Reveal.getIndices(slides[slideIndex]); + this.Reveal.slide( targetIndices.h, targetIndices.v ); + + } + + destroy() { + + this.element.remove(); + + } + +}
\ No newline at end of file diff --git a/present/js/controllers/slidecontent.js b/present/js/controllers/slidecontent.js new file mode 100644 index 0000000..5462dbf --- /dev/null +++ b/present/js/controllers/slidecontent.js @@ -0,0 +1,480 @@ +import { extend, queryAll, closest, getMimeTypeFromFile, encodeRFC3986URI } from '../utils/util.js' +import { isMobile } from '../utils/device.js' + +import fitty from 'fitty'; + +/** + * Handles loading, unloading and playback of slide + * content such as images, videos and iframes. + */ +export default class SlideContent { + + constructor( Reveal ) { + + this.Reveal = Reveal; + + this.startEmbeddedIframe = this.startEmbeddedIframe.bind( this ); + + } + + /** + * Should the given element be preloaded? + * Decides based on local element attributes and global config. + * + * @param {HTMLElement} element + */ + shouldPreload( element ) { + + // Prefer an explicit global preload setting + let preload = this.Reveal.getConfig().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 + */ + load( slide, options = {} ) { + + // Show the slide element + slide.style.display = this.Reveal.getConfig().display; + + // Media elements with data-src attributes + queryAll( slide, 'img[data-src], video[data-src], audio[data-src], iframe[data-src]' ).forEach( element => { + if( element.tagName !== 'IFRAME' || this.shouldPreload( element ) ) { + element.setAttribute( 'src', element.getAttribute( 'data-src' ) ); + element.setAttribute( 'data-lazy-loaded', '' ); + element.removeAttribute( 'data-src' ); + } + } ); + + // Media elements with <source> children + queryAll( slide, 'video, audio' ).forEach( media => { + let sources = 0; + + queryAll( media, 'source[data-src]' ).forEach( source => { + source.setAttribute( 'src', source.getAttribute( 'data-src' ) ); + source.removeAttribute( 'data-src' ); + source.setAttribute( 'data-lazy-loaded', '' ); + sources += 1; + } ); + + // Enable inline video playback in mobile Safari + if( isMobile && media.tagName === 'VIDEO' ) { + media.setAttribute( 'playsinline', '' ); + } + + // 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 + let background = slide.slideBackgroundElement; + if( background ) { + background.style.display = 'block'; + + let backgroundContent = slide.slideBackgroundContentElement; + let backgroundIframe = slide.getAttribute( 'data-background-iframe' ); + + // If the background contains media, load it + if( background.hasAttribute( 'data-loaded' ) === false ) { + background.setAttribute( 'data-loaded', 'true' ); + + let 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' ); + + // Images + if( backgroundImage ) { + // base64 + if( /^data:/.test( backgroundImage.trim() ) ) { + backgroundContent.style.backgroundImage = `url(${backgroundImage.trim()})`; + } + // URL(s) + else { + backgroundContent.style.backgroundImage = backgroundImage.split( ',' ).map( background => { + // Decode URL(s) that are already encoded first + let decoded = decodeURI(background.trim()); + return `url(${encodeRFC3986URI(decoded)})`; + }).join( ',' ); + } + } + // Videos + else if ( backgroundVideo && !this.Reveal.isSpeakerNotes() ) { + let video = document.createElement( 'video' ); + + if( backgroundVideoLoop ) { + video.setAttribute( 'loop', '' ); + } + + if( backgroundVideoMuted ) { + video.muted = true; + } + + // Enable inline playback in mobile Safari + // + // Mute is required for video to play when using + // swipe gestures to navigate since they don't + // count as direct user actions :'( + if( isMobile ) { + video.muted = true; + video.setAttribute( 'playsinline', '' ); + } + + // Support comma separated lists of video sources + backgroundVideo.split( ',' ).forEach( source => { + let type = getMimeTypeFromFile( source ); + if( type ) { + video.innerHTML += `<source src="${source}" type="${type}">`; + } + else { + video.innerHTML += `<source src="${source}">`; + } + } ); + + backgroundContent.appendChild( video ); + } + // Iframes + else if( backgroundIframe && options.excludeIframes !== true ) { + let iframe = document.createElement( 'iframe' ); + iframe.setAttribute( 'allowfullscreen', '' ); + iframe.setAttribute( 'mozallowfullscreen', '' ); + iframe.setAttribute( 'webkitallowfullscreen', '' ); + iframe.setAttribute( 'allow', 'autoplay' ); + + iframe.setAttribute( 'data-src', backgroundIframe ); + + iframe.style.width = '100%'; + iframe.style.height = '100%'; + iframe.style.maxHeight = '100%'; + iframe.style.maxWidth = '100%'; + + backgroundContent.appendChild( iframe ); + } + } + + // Start loading preloadable iframes + let backgroundIframeElement = backgroundContent.querySelector( 'iframe[data-src]' ); + if( backgroundIframeElement ) { + + // Check if this iframe is eligible to be preloaded + if( this.shouldPreload( background ) && !/autoplay=(1|true|yes)/gi.test( backgroundIframe ) ) { + if( backgroundIframeElement.getAttribute( 'src' ) !== backgroundIframe ) { + backgroundIframeElement.setAttribute( 'src', backgroundIframe ); + } + } + + } + + } + + this.layout( slide ); + + } + + /** + * Applies JS-dependent layout helpers for the scope. + */ + layout( scopeElement ) { + + // Autosize text with the r-fit-text class based on the + // size of its container. This needs to happen after the + // slide is visible in order to measure the text. + Array.from( scopeElement.querySelectorAll( '.r-fit-text' ) ).forEach( element => { + fitty( element, { + minSize: 24, + maxSize: this.Reveal.getConfig().height * 0.8, + observeMutations: false, + observeWindow: false + } ); + } ); + + } + + /** + * Unloads and hides the given slide. This is called when the + * slide is moved outside of the configured view distance. + * + * @param {HTMLElement} slide + */ + unload( slide ) { + + // Hide the slide element + slide.style.display = 'none'; + + // Hide the corresponding background element + let background = this.Reveal.getSlideBackground( slide ); + if( background ) { + background.style.display = 'none'; + + // Unload any background iframes + queryAll( background, 'iframe[src]' ).forEach( element => { + element.removeAttribute( 'src' ); + } ); + } + + // Reset lazy-loaded media elements with src attributes + queryAll( slide, 'video[data-lazy-loaded][src], audio[data-lazy-loaded][src], iframe[data-lazy-loaded][src]' ).forEach( element => { + element.setAttribute( 'data-src', element.getAttribute( 'src' ) ); + element.removeAttribute( 'src' ); + } ); + + // Reset lazy-loaded media elements with <source> children + queryAll( slide, 'video[data-lazy-loaded] source[src], audio source[src]' ).forEach( source => { + source.setAttribute( 'data-src', source.getAttribute( 'src' ) ); + source.removeAttribute( 'src' ); + } ); + + } + + /** + * Enforces origin-specific format rules for embedded media. + */ + formatEmbeddedContent() { + + let _appendParamToIframeSource = ( sourceAttribute, sourceURL, param ) => { + queryAll( this.Reveal.getSlidesElement(), 'iframe['+ sourceAttribute +'*="'+ sourceURL +'"]' ).forEach( el => { + let 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 + */ + startEmbeddedContent( element ) { + + if( element && !this.Reveal.isSpeakerNotes() ) { + + // Restart GIFs + queryAll( element, 'img[src$=".gif"]' ).forEach( 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 + queryAll( element, 'video, audio' ).forEach( el => { + if( closest( el, '.fragment' ) && !closest( el, '.fragment.visible' ) ) { + return; + } + + // Prefer an explicit global autoplay setting + let autoplay = this.Reveal.getConfig().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' ) || !!closest( el, '.slide-background' ); + } + + if( autoplay && typeof el.play === 'function' ) { + + // If the media is ready, start playback + if( el.readyState > 1 ) { + this.startEmbeddedMedia( { target: el } ); + } + // Mobile devices never fire a loaded event so instead + // of waiting, we initiate playback + else if( isMobile ) { + let 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( () => { + el.controls = true; + + // Once the video does start playing, hide the controls again + el.addEventListener( 'play', () => { + el.controls = false; + } ); + } ); + } + } + // If the media isn't loaded, wait before playing + else { + el.removeEventListener( 'loadeddata', this.startEmbeddedMedia ); // remove first to avoid dupes + el.addEventListener( 'loadeddata', this.startEmbeddedMedia ); + } + + } + } ); + + // Normal iframes + queryAll( element, 'iframe[src]' ).forEach( el => { + if( closest( el, '.fragment' ) && !closest( el, '.fragment.visible' ) ) { + return; + } + + this.startEmbeddedIframe( { target: el } ); + } ); + + // Lazy loading iframes + queryAll( element, 'iframe[data-src]' ).forEach( el => { + if( closest( el, '.fragment' ) && !closest( el, '.fragment.visible' ) ) { + return; + } + + if( el.getAttribute( 'src' ) !== el.getAttribute( 'data-src' ) ) { + el.removeEventListener( 'load', this.startEmbeddedIframe ); // remove first to avoid dupes + el.addEventListener( 'load', this.startEmbeddedIframe ); + el.setAttribute( 'src', el.getAttribute( 'data-src' ) ); + } + } ); + + } + + } + + /** + * Starts playing an embedded video/audio element after + * it has finished loading. + * + * @param {object} event + */ + startEmbeddedMedia( event ) { + + let isAttachedToDOM = !!closest( event.target, 'html' ), + isVisible = !!closest( event.target, '.present' ); + + if( isAttachedToDOM && isVisible ) { + event.target.currentTime = 0; + event.target.play(); + } + + event.target.removeEventListener( 'loadeddata', this.startEmbeddedMedia ); + + } + + /** + * "Starts" the content of an embedded iframe using the + * postMessage API. + * + * @param {object} event + */ + startEmbeddedIframe( event ) { + + let iframe = event.target; + + if( iframe && iframe.contentWindow ) { + + let isAttachedToDOM = !!closest( event.target, 'html' ), + isVisible = !!closest( event.target, '.present' ); + + if( isAttachedToDOM && isVisible ) { + + // Prefer an explicit global autoplay setting + let autoplay = this.Reveal.getConfig().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' ) || !!closest( 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 + */ + stopEmbeddedContent( element, options = {} ) { + + options = extend( { + // Defaults + unloadIframes: true + }, options ); + + if( element && element.parentNode ) { + // HTML5 media elements + queryAll( element, 'video, audio' ).forEach( 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 + queryAll( element, 'iframe' ).forEach( el => { + if( el.contentWindow ) el.contentWindow.postMessage( 'slide:stop', '*' ); + el.removeEventListener( 'load', this.startEmbeddedIframe ); + }); + + // YouTube postMessage API + queryAll( element, 'iframe[src*="youtube.com/embed/"]' ).forEach( el => { + if( !el.hasAttribute( 'data-ignore' ) && el.contentWindow && typeof el.contentWindow.postMessage === 'function' ) { + el.contentWindow.postMessage( '{"event":"command","func":"pauseVideo","args":""}', '*' ); + } + }); + + // Vimeo postMessage API + queryAll( element, 'iframe[src*="player.vimeo.com/"]' ).forEach( 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 + queryAll( element, 'iframe[data-src]' ).forEach( 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' ); + } ); + } + } + + } + +} diff --git a/present/js/controllers/slidenumber.js b/present/js/controllers/slidenumber.js new file mode 100644 index 0000000..ff887ec --- /dev/null +++ b/present/js/controllers/slidenumber.js @@ -0,0 +1,132 @@ +/** + * Handles the display of reveal.js' optional slide number. + */ +export default class SlideNumber { + + constructor( Reveal ) { + + this.Reveal = Reveal; + + } + + render() { + + this.element = document.createElement( 'div' ); + this.element.className = 'slide-number'; + this.Reveal.getRevealElement().appendChild( this.element ); + + } + + /** + * Called when the reveal.js config is updated. + */ + configure( config, oldConfig ) { + + let slideNumberDisplay = 'none'; + if( config.slideNumber && !this.Reveal.isPrintingPDF() ) { + if( config.showSlideNumber === 'all' ) { + slideNumberDisplay = 'block'; + } + else if( config.showSlideNumber === 'speaker' && this.Reveal.isSpeakerNotes() ) { + slideNumberDisplay = 'block'; + } + } + + this.element.style.display = slideNumberDisplay; + + } + + /** + * Updates the slide number to match the current slide. + */ + update() { + + // Update slide number if enabled + if( this.Reveal.getConfig().slideNumber && this.element ) { + this.element.innerHTML = this.getSlideNumber(); + } + + } + + /** + * Returns the HTML string corresponding to the current slide + * number, including formatting. + */ + getSlideNumber( slide = this.Reveal.getCurrentSlide() ) { + + let config = this.Reveal.getConfig(); + let value; + let format = 'h.v'; + + if ( typeof config.slideNumber === 'function' ) { + value = config.slideNumber( slide ); + } 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 ) && this.Reveal.getHorizontalSlides().length === 1 ) { + format = 'c'; + } + + // Offset the current slide number by 1 to make it 1-indexed + let horizontalOffset = slide && slide.dataset.visibility === 'uncounted' ? 0 : 1; + + value = []; + switch( format ) { + case 'c': + value.push( this.Reveal.getSlidePastCount( slide ) + horizontalOffset ); + break; + case 'c/t': + value.push( this.Reveal.getSlidePastCount( slide ) + horizontalOffset, '/', this.Reveal.getTotalSlides() ); + break; + default: + let indices = this.Reveal.getIndices( slide ); + value.push( indices.h + horizontalOffset ); + let sep = format === 'h/v' ? '/' : '.'; + if( this.Reveal.isVerticalSlide( slide ) ) value.push( sep, indices.v + 1 ); + } + } + + let url = '#' + this.Reveal.location.getHash( slide ); + return this.formatNumber( value[0], value[1], value[2], url ); + + } + + /** + * 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 + * @param {HTMLElement} [url='#'+locationHash()] The url to link to + * @return {string} HTML string fragment + */ + formatNumber( a, delimiter, b, url = '#' + this.Reveal.location.getHash() ) { + + 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>`; + } + + } + + destroy() { + + this.element.remove(); + + } + +}
\ No newline at end of file diff --git a/present/js/controllers/touch.js b/present/js/controllers/touch.js new file mode 100644 index 0000000..5ac6a10 --- /dev/null +++ b/present/js/controllers/touch.js @@ -0,0 +1,263 @@ +import { isAndroid } from '../utils/device.js' +import { matches } from '../utils/util.js' + +const SWIPE_THRESHOLD = 40; + +/** + * Controls all touch interactions and navigations for + * a presentation. + */ +export default class Touch { + + constructor( Reveal ) { + + this.Reveal = Reveal; + + // Holds information about the currently ongoing touch interaction + this.touchStartX = 0; + this.touchStartY = 0; + this.touchStartCount = 0; + this.touchCaptured = false; + + this.onPointerDown = this.onPointerDown.bind( this ); + this.onPointerMove = this.onPointerMove.bind( this ); + this.onPointerUp = this.onPointerUp.bind( this ); + this.onTouchStart = this.onTouchStart.bind( this ); + this.onTouchMove = this.onTouchMove.bind( this ); + this.onTouchEnd = this.onTouchEnd.bind( this ); + + } + + /** + * + */ + bind() { + + let revealElement = this.Reveal.getRevealElement(); + + if( 'onpointerdown' in window ) { + // Use W3C pointer events + revealElement.addEventListener( 'pointerdown', this.onPointerDown, false ); + revealElement.addEventListener( 'pointermove', this.onPointerMove, false ); + revealElement.addEventListener( 'pointerup', this.onPointerUp, false ); + } + else if( window.navigator.msPointerEnabled ) { + // IE 10 uses prefixed version of pointer events + revealElement.addEventListener( 'MSPointerDown', this.onPointerDown, false ); + revealElement.addEventListener( 'MSPointerMove', this.onPointerMove, false ); + revealElement.addEventListener( 'MSPointerUp', this.onPointerUp, false ); + } + else { + // Fall back to touch events + revealElement.addEventListener( 'touchstart', this.onTouchStart, false ); + revealElement.addEventListener( 'touchmove', this.onTouchMove, false ); + revealElement.addEventListener( 'touchend', this.onTouchEnd, false ); + } + + } + + /** + * + */ + unbind() { + + let revealElement = this.Reveal.getRevealElement(); + + revealElement.removeEventListener( 'pointerdown', this.onPointerDown, false ); + revealElement.removeEventListener( 'pointermove', this.onPointerMove, false ); + revealElement.removeEventListener( 'pointerup', this.onPointerUp, false ); + + revealElement.removeEventListener( 'MSPointerDown', this.onPointerDown, false ); + revealElement.removeEventListener( 'MSPointerMove', this.onPointerMove, false ); + revealElement.removeEventListener( 'MSPointerUp', this.onPointerUp, false ); + + revealElement.removeEventListener( 'touchstart', this.onTouchStart, false ); + revealElement.removeEventListener( 'touchmove', this.onTouchMove, false ); + revealElement.removeEventListener( 'touchend', this.onTouchEnd, false ); + + } + + /** + * Checks if the target element prevents the triggering of + * swipe navigation. + */ + isSwipePrevented( target ) { + + // Prevent accidental swipes when scrubbing timelines + if( matches( target, 'video, audio' ) ) return true; + + while( target && typeof target.hasAttribute === 'function' ) { + if( target.hasAttribute( 'data-prevent-swipe' ) ) return true; + target = target.parentNode; + } + + return false; + + } + + /** + * Handler for the 'touchstart' event, enables support for + * swipe and pinch gestures. + * + * @param {object} event + */ + onTouchStart( event ) { + + if( this.isSwipePrevented( event.target ) ) return true; + + this.touchStartX = event.touches[0].clientX; + this.touchStartY = event.touches[0].clientY; + this.touchStartCount = event.touches.length; + + } + + /** + * Handler for the 'touchmove' event. + * + * @param {object} event + */ + onTouchMove( event ) { + + if( this.isSwipePrevented( event.target ) ) return true; + + let config = this.Reveal.getConfig(); + + // Each touch should only trigger one action + if( !this.touchCaptured ) { + this.Reveal.onUserInput( event ); + + let currentX = event.touches[0].clientX; + let currentY = event.touches[0].clientY; + + // There was only one touch point, look for a swipe + if( event.touches.length === 1 && this.touchStartCount !== 2 ) { + + let availableRoutes = this.Reveal.availableRoutes({ includeFragments: true }); + + let deltaX = currentX - this.touchStartX, + deltaY = currentY - this.touchStartY; + + if( deltaX > SWIPE_THRESHOLD && Math.abs( deltaX ) > Math.abs( deltaY ) ) { + this.touchCaptured = true; + if( config.navigationMode === 'linear' ) { + if( config.rtl ) { + this.Reveal.next(); + } + else { + this.Reveal.prev(); + } + } + else { + this.Reveal.left(); + } + } + else if( deltaX < -SWIPE_THRESHOLD && Math.abs( deltaX ) > Math.abs( deltaY ) ) { + this.touchCaptured = true; + if( config.navigationMode === 'linear' ) { + if( config.rtl ) { + this.Reveal.prev(); + } + else { + this.Reveal.next(); + } + } + else { + this.Reveal.right(); + } + } + else if( deltaY > SWIPE_THRESHOLD && availableRoutes.up ) { + this.touchCaptured = true; + if( config.navigationMode === 'linear' ) { + this.Reveal.prev(); + } + else { + this.Reveal.up(); + } + } + else if( deltaY < -SWIPE_THRESHOLD && availableRoutes.down ) { + this.touchCaptured = true; + if( config.navigationMode === 'linear' ) { + this.Reveal.next(); + } + else { + this.Reveal.down(); + } + } + + // If we're embedded, only block touch events if they have + // triggered an action + if( config.embedded ) { + if( this.touchCaptured || this.Reveal.isVerticalSlide() ) { + 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( isAndroid ) { + event.preventDefault(); + } + + } + + /** + * Handler for the 'touchend' event. + * + * @param {object} event + */ + onTouchEnd( event ) { + + this.touchCaptured = false; + + } + + /** + * Convert pointer down to touch start. + * + * @param {object} event + */ + onPointerDown( event ) { + + if( event.pointerType === event.MSPOINTER_TYPE_TOUCH || event.pointerType === "touch" ) { + event.touches = [{ clientX: event.clientX, clientY: event.clientY }]; + this.onTouchStart( event ); + } + + } + + /** + * Convert pointer move to touch move. + * + * @param {object} event + */ + onPointerMove( event ) { + + if( event.pointerType === event.MSPOINTER_TYPE_TOUCH || event.pointerType === "touch" ) { + event.touches = [{ clientX: event.clientX, clientY: event.clientY }]; + this.onTouchMove( event ); + } + + } + + /** + * Convert pointer up to touch end. + * + * @param {object} event + */ + onPointerUp( event ) { + + if( event.pointerType === event.MSPOINTER_TYPE_TOUCH || event.pointerType === "touch" ) { + event.touches = [{ clientX: event.clientX, clientY: event.clientY }]; + this.onTouchEnd( event ); + } + + } + +}
\ No newline at end of file diff --git a/present/js/index.js b/present/js/index.js new file mode 100644 index 0000000..57be501 --- /dev/null +++ b/present/js/index.js @@ -0,0 +1,58 @@ +import Deck, { VERSION } from './reveal.js' + +/** + * Expose the Reveal class to the window. To create a + * new instance: + * let deck = new Reveal( document.querySelector( '.reveal' ), { + * controls: false + * } ); + * deck.initialize().then(() => { + * // reveal.js is ready + * }); + */ +let Reveal = Deck; + + +/** + * The below is a thin shell that mimics the pre 4.0 + * reveal.js API and ensures backwards compatibility. + * This API only allows for one Reveal instance per + * page, whereas the new API above lets you run many + * presentations on the same page. + * + * Reveal.initialize( { controls: false } ).then(() => { + * // reveal.js is ready + * }); + */ + +let enqueuedAPICalls = []; + +Reveal.initialize = options => { + + // Create our singleton reveal.js instance + Object.assign( Reveal, new Deck( document.querySelector( '.reveal' ), options ) ); + + // Invoke any enqueued API calls + enqueuedAPICalls.map( method => method( Reveal ) ); + + return Reveal.initialize(); + +} + +/** + * The pre 4.0 API let you add event listener before + * initializing. We maintain the same behavior by + * queuing up premature API calls and invoking all + * of them when Reveal.initialize is called. + */ +[ 'configure', 'on', 'off', 'addEventListener', 'removeEventListener', 'registerPlugin' ].forEach( method => { + Reveal[method] = ( ...args ) => { + enqueuedAPICalls.push( deck => deck[method].call( null, ...args ) ); + } +} ); + +Reveal.isReady = () => false; + +Reveal.VERSION = VERSION; + +export default Reveal;
\ No newline at end of file diff --git a/present/js/reveal.js b/present/js/reveal.js new file mode 100644 index 0000000..d74e429 --- /dev/null +++ b/present/js/reveal.js @@ -0,0 +1,2836 @@ +import SlideContent from './controllers/slidecontent.js' +import SlideNumber from './controllers/slidenumber.js' +import JumpToSlide from './controllers/jumptoslide.js' +import Backgrounds from './controllers/backgrounds.js' +import AutoAnimate from './controllers/autoanimate.js' +import Fragments from './controllers/fragments.js' +import Overview from './controllers/overview.js' +import Keyboard from './controllers/keyboard.js' +import Location from './controllers/location.js' +import Controls from './controllers/controls.js' +import Progress from './controllers/progress.js' +import Pointer from './controllers/pointer.js' +import Plugins from './controllers/plugins.js' +import Print from './controllers/print.js' +import Touch from './controllers/touch.js' +import Focus from './controllers/focus.js' +import Notes from './controllers/notes.js' +import Playback from './components/playback.js' +import defaultConfig from './config.js' +import * as Util from './utils/util.js' +import * as Device from './utils/device.js' +import { + SLIDES_SELECTOR, + HORIZONTAL_SLIDES_SELECTOR, + VERTICAL_SLIDES_SELECTOR, + POST_MESSAGE_METHOD_BLACKLIST +} from './utils/constants.js' + +// The reveal.js version +export const VERSION = '4.5.0'; + +/** + * reveal.js + * https://revealjs.com + * MIT licensed + * + * Copyright (C) 2011-2022 Hakim El Hattab, https://hakim.se + */ +export default function( revealElement, options ) { + + // Support initialization with no args, one arg + // [options] or two args [revealElement, options] + if( arguments.length < 2 ) { + options = arguments[0]; + revealElement = document.querySelector( '.reveal' ); + } + + const Reveal = {}; + + // Configuration defaults, can be overridden at initialization time + let config = {}, + + // Flags if reveal.js is loaded (has dispatched the 'ready' event) + ready = false, + + // The horizontal and vertical index of the currently active slide + indexh, + indexv, + + // The previous and current slide HTML elements + previousSlide, + currentSlide, + + // Remember which directions that the user has navigated towards + navigationHistory = { + hasNavigatedHorizontally: false, + hasNavigatedVertically: false + }, + + // Slides may have a data-state attribute which we pick up and apply + // as a class to the body. This list contains the combined state of + // all current slides. + state = [], + + // The current scale of the presentation (see width/height config) + scale = 1, + + // CSS transform that is currently applied to the slides container, + // split into two groups + slidesTransform = { layout: '', overview: '' }, + + // Cached references to DOM elements + dom = {}, + + // Flags if the interaction event listeners are bound + eventsAreBound = false, + + // The current slide transition state; idle or running + transition = 'idle', + + // The current auto-slide duration + autoSlide = 0, + + // Auto slide properties + autoSlidePlayer, + autoSlideTimeout = 0, + autoSlideStartTime = -1, + autoSlidePaused = false, + + // Controllers for different aspects of our presentation. They're + // all given direct references to this Reveal instance since there + // may be multiple presentations running in parallel. + slideContent = new SlideContent( Reveal ), + slideNumber = new SlideNumber( Reveal ), + jumpToSlide = new JumpToSlide( Reveal ), + autoAnimate = new AutoAnimate( Reveal ), + backgrounds = new Backgrounds( Reveal ), + fragments = new Fragments( Reveal ), + overview = new Overview( Reveal ), + keyboard = new Keyboard( Reveal ), + location = new Location( Reveal ), + controls = new Controls( Reveal ), + progress = new Progress( Reveal ), + pointer = new Pointer( Reveal ), + plugins = new Plugins( Reveal ), + print = new Print( Reveal ), + focus = new Focus( Reveal ), + touch = new Touch( Reveal ), + notes = new Notes( Reveal ); + + /** + * Starts up the presentation. + */ + function initialize( initOptions ) { + + if( !revealElement ) throw 'Unable to find presentation root (<div class="reveal">).'; + + // Cache references to key DOM elements + dom.wrapper = revealElement; + dom.slides = revealElement.querySelector( '.slides' ); + + if( !dom.slides ) throw 'Unable to find slides container (<div class="slides">).'; + + // Compose our config object in order of increasing precedence: + // 1. Default reveal.js options + // 2. Options provided via Reveal.configure() prior to + // initialization + // 3. Options passed to the Reveal constructor + // 4. Options passed to Reveal.initialize + // 5. Query params + config = { ...defaultConfig, ...config, ...options, ...initOptions, ...Util.getQueryHash() }; + + setViewport(); + + // Force a layout when the whole page, incl fonts, has loaded + window.addEventListener( 'load', layout, false ); + + // Register plugins and load dependencies, then move on to #start() + plugins.load( config.plugins, config.dependencies ).then( start ); + + return new Promise( resolve => Reveal.on( 'ready', resolve ) ); + + } + + /** + * Encase the presentation in a reveal.js viewport. The + * extent of the viewport differs based on configuration. + */ + function setViewport() { + + // Embedded decks use the reveal element as their viewport + if( config.embedded === true ) { + dom.viewport = Util.closest( revealElement, '.reveal-viewport' ) || revealElement; + } + // Full-page decks use the body as their viewport + else { + dom.viewport = document.body; + document.documentElement.classList.add( 'reveal-full-page' ); + } + + dom.viewport.classList.add( 'reveal-viewport' ); + + } + + /** + * Starts up reveal.js by binding input events and navigating + * to the current URL deeplink if there is one. + */ + function start() { + + ready = true; + + // Remove slides hidden with data-visibility + removeHiddenSlides(); + + // 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(); + + // Adds bindings for fullscreen mode + setupFullscreen(); + + // 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 + location.readURL(); + + // Create slide backgrounds + backgrounds.update( true ); + + // Notify listeners that the presentation is ready but use a 1ms + // timeout to ensure it's not fired synchronously after #initialize() + setTimeout( () => { + // Enable transitions now that we're loaded + dom.slides.classList.remove( 'no-transition' ); + + dom.wrapper.classList.add( 'ready' ); + + dispatchEvent({ + type: 'ready', + data: { + indexh, + indexv, + currentSlide + } + }); + }, 1 ); + + // Special setup and config is required when printing to PDF + if( print.isPrintingPDF() ) { + removeEventListeners(); + + // The document needs to have loaded for the PDF layout + // measurements to be accurate + if( document.readyState === 'complete' ) { + print.setupPDF(); + } + else { + window.addEventListener( 'load', () => { + print.setupPDF(); + } ); + } + } + + } + + /** + * Removes all slides with data-visibility="hidden". This + * is done right before the rest of the presentation is + * initialized. + * + * If you want to show all hidden slides, initialize + * reveal.js with showHiddenSlides set to true. + */ + function removeHiddenSlides() { + + if( !config.showHiddenSlides ) { + Util.queryAll( dom.wrapper, 'section[data-visibility="hidden"]' ).forEach( slide => { + slide.parentNode.removeChild( slide ); + } ); + } + + } + + /** + * 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( Device.isMobile ) { + dom.wrapper.classList.add( 'no-hover' ); + } + else { + dom.wrapper.classList.remove( 'no-hover' ); + } + + backgrounds.render(); + slideNumber.render(); + jumpToSlide.render(); + controls.render(); + progress.render(); + notes.render(); + + // Overlay graphic which is displayed during the paused mode + dom.pauseOverlay = Util.createSingletonNode( dom.wrapper, 'div', 'pause-overlay', config.controls ? '<button class="resume-button">Resume presentation</button>' : null ); + + dom.statusElement = createStatusElement(); + + dom.wrapper.setAttribute( 'role', 'application' ); + } + + /** + * 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 createStatusElement() { + + let statusElement = dom.wrapper.querySelector( '.aria-status' ); + if( !statusElement ) { + statusElement = document.createElement( 'div' ); + statusElement.style.position = 'absolute'; + statusElement.style.height = '1px'; + statusElement.style.width = '1px'; + statusElement.style.overflow = 'hidden'; + statusElement.style.clip = 'rect( 1px, 1px, 1px, 1px )'; + statusElement.classList.add( 'aria-status' ); + statusElement.setAttribute( 'aria-live', 'polite' ); + statusElement.setAttribute( 'aria-atomic','true' ); + dom.wrapper.appendChild( statusElement ); + } + return statusElement; + + } + + /** + * Announces the given text to screen readers. + */ + function announceStatus( value ) { + + dom.statusElement.textContent = value; + + } + + /** + * 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 ) { + + let text = ''; + + // Text node + if( node.nodeType === 3 ) { + text += node.textContent; + } + // Element node + else if( node.nodeType === 1 ) { + + let isAriaHidden = node.getAttribute( 'aria-hidden' ); + let isDisplayHidden = window.getComputedStyle( node )['display'] === 'none'; + if( isAriaHidden !== 'true' && !isDisplayHidden ) { + + Array.from( node.childNodes ).forEach( child => { + text += getStatusText( child ); + } ); + + } + + } + + text = text.trim(); + + return text === '' ? '' : text + ' '; + + } + + /** + * 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( () => { + if( dom.wrapper.scrollTop !== 0 || dom.wrapper.scrollLeft !== 0 ) { + dom.wrapper.scrollTop = 0; + dom.wrapper.scrollLeft = 0; + } + }, 1000 ); + + } + + /** + * After entering fullscreen we need to force a layout to + * get our presentations to scale correctly. This behavior + * is inconsistent across browsers but a force layout seems + * to normalize it. + */ + function setupFullscreen() { + + document.addEventListener( 'fullscreenchange', onFullscreenChange ); + document.addEventListener( 'webkitfullscreenchange', onFullscreenChange ); + + } + + /** + * 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', onPostMessage, false ); + } + + } + + /** + * Applies the configuration settings from the config + * object. May be called multiple times. + * + * @param {object} options + */ + function configure( options ) { + + const oldConfig = { ...config } + + // New config options may be passed when this method + // is invoked through the API after initialization + if( typeof options === 'object' ) Util.extend( config, options ); + + // Abort if reveal.js hasn't finished loading, config + // changes will be applied automatically once ready + if( Reveal.isReady() === false ) return; + + const numberOfSlides = dom.wrapper.querySelectorAll( SLIDES_SELECTOR ).length; + + // The transition is added as a class on the .reveal element + dom.wrapper.classList.remove( oldConfig.transition ); + dom.wrapper.classList.add( config.transition ); + + dom.wrapper.setAttribute( 'data-transition-speed', config.transitionSpeed ); + dom.wrapper.setAttribute( 'data-background-transition', config.backgroundTransition ); + + // Expose our configured slide dimensions as custom props + dom.viewport.style.setProperty( '--slide-width', config.width + 'px' ); + dom.viewport.style.setProperty( '--slide-height', config.height + 'px' ); + + if( config.shuffle ) { + shuffle(); + } + + Util.toggleClass( dom.wrapper, 'embedded', config.embedded ); + Util.toggleClass( dom.wrapper, 'rtl', config.rtl ); + Util.toggleClass( dom.wrapper, 'center', config.center ); + + // Exit the paused mode if it was configured off + if( config.pause === false ) { + resume(); + } + + // Iframe link previews + if( config.previewLinks ) { + enablePreviewLinks(); + disablePreviewLinks( '[data-preview-link=false]' ); + } + else { + disablePreviewLinks(); + enablePreviewLinks( '[data-preview-link]:not([data-preview-link=false])' ); + } + + // Reset all changes made by auto-animations + autoAnimate.reset(); + + // Remove existing auto-slide controls + if( autoSlidePlayer ) { + autoSlidePlayer.destroy(); + autoSlidePlayer = null; + } + + // Generate auto-slide controls if needed + if( numberOfSlides > 1 && config.autoSlide && config.autoSlideStoppable ) { + autoSlidePlayer = new Playback( dom.wrapper, () => { + return Math.min( Math.max( ( Date.now() - autoSlideStartTime ) / autoSlide, 0 ), 1 ); + } ); + + autoSlidePlayer.on( 'click', onAutoSlidePlayerClick ); + autoSlidePaused = false; + } + + // 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' ); + } + + notes.configure( config, oldConfig ); + focus.configure( config, oldConfig ); + pointer.configure( config, oldConfig ); + controls.configure( config, oldConfig ); + progress.configure( config, oldConfig ); + keyboard.configure( config, oldConfig ); + fragments.configure( config, oldConfig ); + slideNumber.configure( config, oldConfig ); + + sync(); + + } + + /** + * Binds all event listeners. + */ + function addEventListeners() { + + eventsAreBound = true; + + window.addEventListener( 'resize', onWindowResize, false ); + + if( config.touch ) touch.bind(); + if( config.keyboard ) keyboard.bind(); + if( config.progress ) progress.bind(); + if( config.respondToHashChanges ) location.bind(); + controls.bind(); + focus.bind(); + + dom.slides.addEventListener( 'click', onSlidesClicked, false ); + dom.slides.addEventListener( 'transitionend', onTransitionEnd, false ); + dom.pauseOverlay.addEventListener( 'click', resume, false ); + + if( config.focusBodyOnPageVisibilityChange ) { + document.addEventListener( 'visibilitychange', onPageVisibilityChange, false ); + } + + } + + /** + * Unbinds all event listeners. + */ + function removeEventListeners() { + + eventsAreBound = false; + + touch.unbind(); + focus.unbind(); + keyboard.unbind(); + controls.unbind(); + progress.unbind(); + location.unbind(); + + window.removeEventListener( 'resize', onWindowResize, false ); + + dom.slides.removeEventListener( 'click', onSlidesClicked, false ); + dom.slides.removeEventListener( 'transitionend', onTransitionEnd, false ); + dom.pauseOverlay.removeEventListener( 'click', resume, false ); + + } + + /** + * Uninitializes reveal.js by undoing changes made to the + * DOM and removing all event listeners. + */ + function destroy() { + + removeEventListeners(); + cancelAutoSlide(); + disablePreviewLinks(); + + // Destroy controllers + notes.destroy(); + focus.destroy(); + plugins.destroy(); + pointer.destroy(); + controls.destroy(); + progress.destroy(); + backgrounds.destroy(); + slideNumber.destroy(); + jumpToSlide.destroy(); + + // Remove event listeners + document.removeEventListener( 'fullscreenchange', onFullscreenChange ); + document.removeEventListener( 'webkitfullscreenchange', onFullscreenChange ); + document.removeEventListener( 'visibilitychange', onPageVisibilityChange, false ); + window.removeEventListener( 'message', onPostMessage, false ); + window.removeEventListener( 'load', layout, false ); + + // Undo DOM changes + if( dom.pauseOverlay ) dom.pauseOverlay.remove(); + if( dom.statusElement ) dom.statusElement.remove(); + + document.documentElement.classList.remove( 'reveal-full-page' ); + + dom.wrapper.classList.remove( 'ready', 'center', 'has-horizontal-slides', 'has-vertical-slides' ); + dom.wrapper.removeAttribute( 'data-transition-speed' ); + dom.wrapper.removeAttribute( 'data-background-transition' ); + + dom.viewport.classList.remove( 'reveal-viewport' ); + dom.viewport.style.removeProperty( '--slide-width' ); + dom.viewport.style.removeProperty( '--slide-height' ); + + dom.slides.style.removeProperty( 'width' ); + dom.slides.style.removeProperty( 'height' ); + dom.slides.style.removeProperty( 'zoom' ); + dom.slides.style.removeProperty( 'left' ); + dom.slides.style.removeProperty( 'top' ); + dom.slides.style.removeProperty( 'bottom' ); + dom.slides.style.removeProperty( 'right' ); + dom.slides.style.removeProperty( 'transform' ); + + Array.from( dom.wrapper.querySelectorAll( SLIDES_SELECTOR ) ).forEach( slide => { + slide.style.removeProperty( 'display' ); + slide.style.removeProperty( 'top' ); + slide.removeAttribute( 'hidden' ); + slide.removeAttribute( 'aria-hidden' ); + } ); + + } + + /** + * Adds a listener to one of our custom reveal.js events, + * like slidechanged. + */ + function on( type, listener, useCapture ) { + + revealElement.addEventListener( type, listener, useCapture ); + + } + + /** + * Unsubscribes from a reveal.js event. + */ + function off( type, listener, useCapture ) { + + revealElement.removeEventListener( type, listener, useCapture ); + + } + + /** + * 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 ) { + Util.transformElement( dom.slides, slidesTransform.layout + ' ' + slidesTransform.overview ); + } + else { + Util.transformElement( dom.slides, slidesTransform.overview ); + } + + } + + /** + * Dispatches an event of the specified type from the + * reveal DOM element. + */ + function dispatchEvent({ target=dom.wrapper, type, data, bubbles=true }) { + + let event = document.createEvent( 'HTMLEvents', 1, 2 ); + event.initEvent( type, bubbles, true ); + Util.extend( event, data ); + target.dispatchEvent( event ); + + if( target === dom.wrapper ) { + // If we're in an iframe, post each reveal.js event to the + // parent window. Used by the notes plugin + dispatchPostMessage( type ); + } + + return event; + + } + + /** + * Dispatched a postMessage of the given type from our window. + */ + function dispatchPostMessage( type, data ) { + + if( config.postMessageEvents && window.parent !== window.self ) { + let message = { + namespace: 'reveal', + eventName: type, + state: getState() + }; + + Util.extend( message, data ); + + window.parent.postMessage( JSON.stringify( message ), '*' ); + } + + } + + /** + * Bind preview frame links. + * + * @param {string} [selector=a] - selector for anchors + */ + function enablePreviewLinks( selector = 'a' ) { + + Array.from( dom.wrapper.querySelectorAll( selector ) ).forEach( element => { + if( /^(http|www)/gi.test( element.getAttribute( 'href' ) ) ) { + element.addEventListener( 'click', onPreviewLinkClicked, false ); + } + } ); + + } + + /** + * Unbind preview frame links. + */ + function disablePreviewLinks( selector = 'a' ) { + + Array.from( dom.wrapper.querySelectorAll( selector ) ).forEach( 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>`; + + dom.overlay.querySelector( 'iframe' ).addEventListener( 'load', event => { + dom.overlay.classList.add( 'loaded' ); + }, false ); + + dom.overlay.querySelector( '.close' ).addEventListener( 'click', event => { + closeOverlay(); + event.preventDefault(); + }, false ); + + dom.overlay.querySelector( '.external' ).addEventListener( 'click', event => { + closeOverlay(); + }, false ); + + } + + /** + * 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 ); + + let html = '<p class="title">Keyboard Shortcuts</p><br/>'; + + let shortcuts = keyboard.getShortcuts(), + bindings = keyboard.getBindings(); + + html += '<table><th>KEY</th><th>ACTION</th>'; + for( let key in shortcuts ) { + html += `<tr><td>${key}</td><td>${shortcuts[ key ]}</td></tr>`; + } + + // Add custom key bindings that have associated descriptions + for( let binding in bindings ) { + if( bindings[binding].key && bindings[binding].description ) { + html += `<tr><td>${bindings[binding].key}</td><td>${bindings[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> + `; + + dom.overlay.querySelector( '.close' ).addEventListener( 'click', event => { + closeOverlay(); + event.preventDefault(); + }, false ); + + } + + } + + /** + * Closes any currently open overlay. + */ + function closeOverlay() { + + if( dom.overlay ) { + dom.overlay.parentNode.removeChild( dom.overlay ); + dom.overlay = null; + return true; + } + + return false; + + } + + /** + * Applies JavaScript-controlled layout rules to the + * presentation. + */ + function layout() { + + if( dom.wrapper && !print.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( Device.isMobile && !config.embedded ) { + document.documentElement.style.setProperty( '--vh', ( window.innerHeight * 0.01 ) + 'px' ); + } + + const size = getComputedSlideSize(); + + const 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 { + 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 + const slides = Array.from( dom.wrapper.querySelectorAll( SLIDES_SELECTOR ) ); + + for( let i = 0, len = slides.length; i < len; i++ ) { + const 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({ + type: 'resize', + data: { + oldScale, + scale, + size + } + }); + } + } + + dom.viewport.style.setProperty( '--slide-scale', scale ); + + progress.update(); + backgrounds.updateParallax(); + + if( overview.isActive() ) { + overview.update(); + } + + } + + } + + /** + * 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 'r-stretch' class + Util.queryAll( dom.slides, 'section > .stretch, section > .r-stretch' ).forEach( element => { + + // Determine how much vertical space we can use + let remainingHeight = Util.getRemainingHeight( element, height ); + + // Consider the aspect ratio of media elements + if( /(img|video)/gi.test( element.nodeName ) ) { + const nw = element.naturalWidth || element.videoWidth, + nh = element.naturalHeight || element.videoHeight; + + const 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 ) { + let width = config.width; + let height = config.height; + + if( config.disableLayout ) { + width = dom.slides.offsetWidth; + height = dom.slides.offsetHeight; + } + + const size = { + // Slide size + width: width, + height: 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 + const attributeName = stack.hasAttribute( 'data-start-indexv' ) ? 'data-start-indexv' : 'data-previous-indexv'; + + return parseInt( stack.getAttribute( attributeName ) || 0, 10 ); + } + + return 0; + + } + + /** + * 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 = currentSlide ) { + + return slide && slide.parentNode && !!slide.parentNode.nodeName.match( /section/i ); + + } + + /** + * Returns true if we're on the last slide in the current + * vertical stack. + */ + function isLastVerticalSlide() { + + if( currentSlide && isVerticalSlide( currentSlide ) ) { + // Does this slide have a next sibling? + if( currentSlide.nextElementSibling ) return false; + + return true; + } + + return false; + + } + + /** + * Returns true if we're currently on the first slide in + * the presentation. + */ + function isFirstSlide() { + + return indexh === 0 && indexv === 0; + + } + + /** + * Returns true if we're currently on the last slide in + * the presenation. If the last slide is a stack, we only + * consider this the last slide if it's at the end of the + * stack. + */ + function isLastSlide() { + + if( currentSlide ) { + // Does this slide have a next sibling? + if( currentSlide.nextElementSibling ) return false; + + // If it's vertical, does its parent have a next sibling? + if( isVerticalSlide( currentSlide ) && currentSlide.parentNode.nextElementSibling ) return false; + + return true; + } + + return false; + + } + + /** + * Enters the paused mode which fades everything on screen to + * black. + */ + function pause() { + + if( config.pause ) { + const wasPaused = dom.wrapper.classList.contains( 'paused' ); + + cancelAutoSlide(); + dom.wrapper.classList.add( 'paused' ); + + if( wasPaused === false ) { + dispatchEvent({ type: 'paused' }); + } + } + + } + + /** + * Exits from the paused mode. + */ + function resume() { + + const wasPaused = dom.wrapper.classList.contains( 'paused' ); + dom.wrapper.classList.remove( 'paused' ); + + cueAutoSlide(); + + if( wasPaused ) { + dispatchEvent({ type: '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 visibility of the jump-to-slide UI. + */ + function toggleJumpToSlide( override ) { + + if( typeof override === 'boolean' ) { + override ? jumpToSlide.show() : jumpToSlide.hide(); + } + else { + jumpToSlide.isVisible() ? jumpToSlide.hide() : jumpToSlide.show(); + } + + } + + /** + * 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} [origin] Origin for use in multimaster environments + */ + function slide( h, v, f, origin ) { + + // Dispatch an event before the slide + const slidechange = dispatchEvent({ + type: 'beforeslidechange', + data: { + indexh: h === undefined ? indexh : h, + indexv: v === undefined ? indexv : v, + origin + } + }); + + // Abort if this slide change was prevented by an event listener + if( slidechange.defaultPrevented ) return; + + // Remember where we were at before + previousSlide = currentSlide; + + // Query all horizontal slides in the deck + const 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 && !overview.isActive() ) { + 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 + const stateBefore = state.concat(); + + // Reset the state array + state.length = 0; + + let 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 ); + + // Dispatch an event if the slide changed + let slideChanged = ( indexh !== indexhBefore || indexv !== indexvBefore ); + + // Ensure that the previous slide is never the same as the current + if( !slideChanged ) previousSlide = null; + + // Find the current horizontal slide and any possible vertical slides + // within it + let currentHorizontalSlide = horizontalSlides[ indexh ], + currentVerticalSlides = currentHorizontalSlide.querySelectorAll( 'section' ); + + // Store references to the previous and current slides + currentSlide = currentVerticalSlides[ indexv ] || currentHorizontalSlide; + + let autoAnimateTransition = false; + + // Detect if we're moving between two auto-animated slides + if( slideChanged && previousSlide && currentSlide && !overview.isActive() ) { + + // If this is an auto-animated transition, we disable the + // regular slide transition + // + // Note 20-03-2020: + // This needs to happen before we update slide visibility, + // otherwise transitions will still run in Safari. + if( previousSlide.hasAttribute( 'data-auto-animate' ) && currentSlide.hasAttribute( 'data-auto-animate' ) + && previousSlide.getAttribute( 'data-auto-animate-id' ) === currentSlide.getAttribute( 'data-auto-animate-id' ) + && !( ( indexh > indexhBefore || indexv > indexvBefore ) ? currentSlide : previousSlide ).hasAttribute( 'data-auto-animate-restart' ) ) { + + autoAnimateTransition = true; + dom.slides.classList.add( 'disable-slide-transitions' ); + } + + transition = 'running'; + + } + + // Update the visibility of slides now that the indices have changed + updateSlidesVisibility(); + + layout(); + + // Update the overview if it's currently active + if( overview.isActive() ) { + overview.update(); + } + + // Show fragment, if specified + if( typeof f !== 'undefined' ) { + fragments.goto( f ); + } + + // 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 + if( isFirstSlide() ) { + // Launch async task + setTimeout( () => { + getVerticalStacks().forEach( slide => { + setPreviousVerticalIndex( slide, 0 ); + } ); + }, 0 ); + } + } + + // Apply the new state + stateLoop: for( let 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( let j = 0; j < stateBefore.length; j++ ) { + if( stateBefore[j] === state[i] ) { + stateBefore.splice( j, 1 ); + continue stateLoop; + } + } + + dom.viewport.classList.add( state[i] ); + + // Dispatch custom event matching the state's name + dispatchEvent({ type: state[i] }); + } + + // Clean up the remains of the previous state + while( stateBefore.length ) { + dom.viewport.classList.remove( stateBefore.pop() ); + } + + if( slideChanged ) { + dispatchEvent({ + type: 'slidechanged', + data: { + indexh, + indexv, + previousSlide, + currentSlide, + origin + } + }); + } + + // Handle embedded content + if( slideChanged || !previousSlide ) { + slideContent.stopEmbeddedContent( previousSlide ); + slideContent.startEmbeddedContent( currentSlide ); + } + + // Announce the current slide contents to screen readers + // Use animation frame to prevent getComputedStyle in getStatusText + // from triggering layout mid-frame + requestAnimationFrame( () => { + announceStatus( getStatusText( currentSlide ) ); + }); + + progress.update(); + controls.update(); + notes.update(); + backgrounds.update(); + backgrounds.updateParallax(); + slideNumber.update(); + fragments.update(); + + // Update the URL hash + location.writeURL(); + + cueAutoSlide(); + + // Auto-animation + if( autoAnimateTransition ) { + + setTimeout( () => { + dom.slides.classList.remove( 'disable-slide-transitions' ); + }, 0 ); + + if( config.autoAnimate ) { + // Run the auto-animation between our slides + autoAnimate.run( previousSlide, currentSlide ); + } + + } + + } + + /** + * 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 all slide backgrounds + backgrounds.create(); + + // Write the current hash to the URL + location.writeURL(); + + if( config.sortFragmentsOnSync === true ) { + fragments.sortAll(); + } + + controls.update(); + progress.update(); + + updateSlidesVisibility(); + + notes.update(); + notes.updateVisibility(); + backgrounds.update( true ); + slideNumber.update(); + slideContent.formatEmbeddedContent(); + + // Start or stop embedded content depending on global config + if( config.autoPlayMedia === false ) { + slideContent.stopEmbeddedContent( currentSlide, { unloadIframes: false } ); + } + else { + slideContent.startEmbeddedContent( currentSlide ); + } + + if( overview.isActive() ) { + overview.layout(); + } + + } + + /** + * 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 = currentSlide ) { + + backgrounds.sync( slide ); + fragments.sync( slide ); + + slideContent.load( slide ); + + backgrounds.update(); + notes.update(); + + } + + /** + * Resets all vertical slides so that only the first + * is visible. + */ + function resetVerticalSlides() { + + getHorizontalSlides().forEach( horizontalSlide => { + + Util.queryAll( horizontalSlide, 'section' ).forEach( ( verticalSlide, y ) => { + + if( y > 0 ) { + verticalSlide.classList.remove( 'present' ); + verticalSlide.classList.remove( 'past' ); + verticalSlide.classList.add( 'future' ); + verticalSlide.setAttribute( 'aria-hidden', 'true' ); + } + + } ); + + } ); + + } + + /** + * Randomly shuffles all slides in the deck. + */ + function shuffle( slides = getHorizontalSlides() ) { + + slides.forEach( ( slide, i ) => { + + // Insert the slide next to a randomly picked sibling slide + // slide. This may cause the slide to insert before itself, + // but that's not an issue. + let beforeSlide = slides[ Math.floor( Math.random() * slides.length ) ]; + if( beforeSlide.parentNode === slide.parentNode ) { + slide.parentNode.insertBefore( slide, beforeSlide ); + } + + // Randomize the order of vertical slides (if there are any) + let verticalSlides = slide.querySelectorAll( 'section' ); + if( verticalSlides.length ) { + shuffle( verticalSlides ); + } + + } ); + + } + + /** + * 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 + let slides = Util.queryAll( dom.wrapper, selector ), + slidesLength = slides.length; + + let printMode = print.isPrintingPDF(); + let loopedForwards = false; + let loopedBackwards = false; + + if( slidesLength ) { + + // Should the index loop? + if( config.loop ) { + if( index >= slidesLength ) loopedForwards = true; + + index %= slidesLength; + + if( index < 0 ) { + index = slidesLength + index; + loopedBackwards = true; + } + } + + // Enforce max and minimum index bounds + index = Math.max( Math.min( index, slidesLength - 1 ), 0 ); + + for( let i = 0; i < slidesLength; i++ ) { + let element = slides[i]; + + let reverse = config.rtl && !isVerticalSlide( element ); + + // Avoid .remove() with multiple args for IE11 support + 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 + showFragmentsIn( element ); + } + } + 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 + hideFragmentsIn( element ); + } + } + // Update the visibility of fragments when a presentation loops + // in either direction + else if( i === index && config.fragments ) { + if( loopedForwards ) { + hideFragmentsIn( element ); + } + else if( loopedBackwards ) { + showFragmentsIn( element ); + } + } + } + + let slide = slides[index]; + let wasPresent = slide.classList.contains( 'present' ); + + // Mark the current slide as present + slide.classList.add( 'present' ); + slide.removeAttribute( 'hidden' ); + slide.removeAttribute( 'aria-hidden' ); + + if( !wasPresent ) { + // Dispatch an event indicating the slide is now visible + dispatchEvent({ + target: slide, + type: 'visible', + bubbles: false + }); + } + + // If this slide has a state associated with it, add it + // onto the current state of the deck + let slideState = slide.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; + + } + + /** + * Shows all fragment elements within the given contaienr. + */ + function showFragmentsIn( container ) { + + Util.queryAll( container, '.fragment' ).forEach( fragment => { + fragment.classList.add( 'visible' ); + fragment.classList.remove( 'current-fragment' ); + } ); + + } + + /** + * Hides all fragment elements within the given contaienr. + */ + function hideFragmentsIn( container ) { + + Util.queryAll( container, '.fragment.visible' ).forEach( fragment => { + fragment.classList.remove( 'visible', 'current-fragment' ); + } ); + + } + + /** + * 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 + let horizontalSlides = getHorizontalSlides(), + horizontalSlidesLength = horizontalSlides.length, + distanceX, + distanceY; + + if( horizontalSlidesLength && typeof indexh !== 'undefined' ) { + + // The number of steps away from the present slide that will + // be visible + let viewDistance = overview.isActive() ? 10 : config.viewDistance; + + // Shorten the view distance on devices that typically have + // less resources + if( Device.isMobile ) { + viewDistance = overview.isActive() ? 6 : config.mobileViewDistance; + } + + // All slides need to be visible when exporting to PDF + if( print.isPrintingPDF() ) { + viewDistance = Number.MAX_VALUE; + } + + for( let x = 0; x < horizontalSlidesLength; x++ ) { + let horizontalSlide = horizontalSlides[x]; + + let verticalSlides = Util.queryAll( horizontalSlide, '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 ) { + slideContent.load( horizontalSlide ); + } + else { + slideContent.unload( horizontalSlide ); + } + + if( verticalSlidesLength ) { + + let oy = getPreviousVerticalIndex( horizontalSlide ); + + for( let y = 0; y < verticalSlidesLength; y++ ) { + let verticalSlide = verticalSlides[y]; + + distanceY = x === ( indexh || 0 ) ? Math.abs( ( indexv || 0 ) - y ) : Math.abs( y - oy ); + + if( distanceX + distanceY < viewDistance ) { + slideContent.load( verticalSlide ); + } + else { + slideContent.unload( verticalSlide ); + } + } + + } + } + + // Flag if there are ANY vertical slides, anywhere in the deck + if( hasVerticalSlides() ) { + 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( hasHorizontalSlides() ) { + dom.wrapper.classList.add( 'has-horizontal-slides' ); + } + else { + dom.wrapper.classList.remove( 'has-horizontal-slides' ); + } + + } + + } + + /** + * Determine what available routes there are for navigation. + * + * @return {{left: boolean, right: boolean, up: boolean, down: boolean}} + */ + function availableRoutes({ includeFragments = false } = {}) { + + let horizontalSlides = dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ), + verticalSlides = dom.wrapper.querySelectorAll( VERTICAL_SLIDES_SELECTOR ); + + let 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; + } + } + + if ( horizontalSlides.length > 1 && config.navigationMode === 'linear' ) { + routes.right = routes.right || routes.down; + routes.left = routes.left || routes.up; + } + + // If includeFragments is set, a route will be considered + // available if either a slid OR fragment is available in + // the given direction + if( includeFragments === true ) { + let fragmentRoutes = fragments.availableRoutes(); + routes.left = routes.left || fragmentRoutes.prev; + routes.up = routes.up || fragmentRoutes.prev; + routes.down = routes.down || fragmentRoutes.next; + routes.right = routes.right || fragmentRoutes.next; + } + + // Reverse horizontal controls for rtl + if( config.rtl ) { + let left = routes.left; + routes.left = routes.right; + routes.right = left; + } + + return routes; + + } + + /** + * Returns the number of past slides. This can be used as a global + * flattened index for slides. + * + * @param {HTMLElement} [slide=currentSlide] The slide we're counting before + * + * @return {number} Past slide count + */ + function getSlidePastCount( slide = currentSlide ) { + + let horizontalSlides = getHorizontalSlides(); + + // The number of past slides + let pastCount = 0; + + // Step through all slides and count the past ones + mainLoop: for( let i = 0; i < horizontalSlides.length; i++ ) { + + let horizontalSlide = horizontalSlides[i]; + let verticalSlides = horizontalSlide.querySelectorAll( 'section' ); + + for( let j = 0; j < verticalSlides.length; j++ ) { + + // Stop as soon as we arrive at the present + if( verticalSlides[j] === slide ) { + break mainLoop; + } + + // Don't count slides with the "uncounted" class + if( verticalSlides[j].dataset.visibility !== 'uncounted' ) { + pastCount++; + } + + } + + // Stop as soon as we arrive at the present + if( horizontalSlide === slide ) { + break; + } + + // Don't count the wrapping section for vertical slides and + // slides marked as uncounted + if( horizontalSlide.classList.contains( 'stack' ) === false && horizontalSlide.dataset.visibility !== 'uncounted' ) { + 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 + let totalCount = getTotalSlides(); + let pastCount = getSlidePastCount(); + + if( currentSlide ) { + + let allFragments = currentSlide.querySelectorAll( '.fragment' ); + + // If there are fragments in the current slide those should be + // accounted for in the progress. + if( allFragments.length > 0 ) { + let 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) + let fragmentWeight = 0.9; + + // Add fragment progress to the past slide count + pastCount += ( visibleFragments.length / allFragments.length ) * fragmentWeight; + } + + } + + return Math.min( pastCount / ( totalCount - 1 ), 1 ); + + } + + /** + * 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 + let h = indexh, + v = indexv, + f; + + // If a slide is specified, return the indices of that slide + if( slide ) { + let isVertical = isVerticalSlide( slide ); + let slideh = isVertical ? slide.parentNode : slide; + + // Select all horizontal slides + let horizontalSlides = getHorizontalSlides(); + + // 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( Util.queryAll( slide.parentNode, 'section' ).indexOf( slide ), 0 ); + } + } + + if( !slide && currentSlide ) { + let hasFragments = currentSlide.querySelectorAll( '.fragment' ).length > 0; + if( hasFragments ) { + let 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, v, f }; + + } + + /** + * Retrieves all slides in this presentation. + */ + function getSlides() { + + return Util.queryAll( dom.wrapper, SLIDES_SELECTOR + ':not(.stack):not([data-visibility="uncounted"])' ); + + } + + /** + * Returns a list of all horizontal slides in the deck. Each + * vertical stack is included as one horizontal slide in the + * resulting array. + */ + function getHorizontalSlides() { + + return Util.queryAll( dom.wrapper, HORIZONTAL_SLIDES_SELECTOR ); + + } + + /** + * Returns all vertical slides that exist within this deck. + */ + function getVerticalSlides() { + + return Util.queryAll( dom.wrapper, '.slides>section>section' ); + + } + + /** + * Returns all vertical stacks (each stack can contain multiple slides). + */ + function getVerticalStacks() { + + return Util.queryAll( dom.wrapper, HORIZONTAL_SLIDES_SELECTOR + '.stack'); + + } + + /** + * Returns true if there are at least two horizontal slides. + */ + function hasHorizontalSlides() { + + return getHorizontalSlides().length > 1; + } + + /** + * Returns true if there are at least two vertical slides. + */ + function hasVerticalSlides() { + + return getVerticalSlides().length > 1; + + } + + /** + * Returns an array of objects where each object represents the + * attributes on its respective slide. + */ + function getSlidesAttributes() { + + return getSlides().map( slide => { + + let attributes = {}; + for( let i = 0; i < slide.attributes.length; i++ ) { + let 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 ) { + + let horizontalSlide = getHorizontalSlides()[ x ]; + let 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 ) { + + let slide = typeof x === 'number' ? getSlide( x, y ) : x; + if( slide ) { + return slide.slideBackgroundElement; + } + + return undefined; + + } + + /** + * 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() { + + let indices = getIndices(); + + return { + indexh: indices.h, + indexv: indices.v, + indexf: indices.f, + paused: isPaused(), + overview: overview.isActive() + }; + + } + + /** + * 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( Util.deserialize( state.indexh ), Util.deserialize( state.indexv ), Util.deserialize( state.indexf ) ); + + let pausedFlag = Util.deserialize( state.paused ), + overviewFlag = Util.deserialize( state.overview ); + + if( typeof pausedFlag === 'boolean' && pausedFlag !== isPaused() ) { + togglePause( pausedFlag ); + } + + if( typeof overviewFlag === 'boolean' && overviewFlag !== overview.isActive() ) { + overview.toggle( overviewFlag ); + } + } + + } + + /** + * Cues a new automated slide if enabled in the config. + */ + function cueAutoSlide() { + + cancelAutoSlide(); + + if( currentSlide && config.autoSlide !== false ) { + + let fragment = currentSlide.querySelector( '.current-fragment' ); + + let fragmentAutoSlide = fragment ? fragment.getAttribute( 'data-autoslide' ) : null; + let parentAutoSlide = currentSlide.parentNode ? currentSlide.parentNode.getAttribute( 'data-autoslide' ) : null; + let 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 ) { + Util.queryAll( currentSlide, 'video, audio' ).forEach( 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() && !overview.isActive() && ( !isLastSlide() || fragments.availableRoutes().next || config.loop === true ) ) { + autoSlideTimeout = setTimeout( () => { + if( typeof config.autoSlideMethod === 'function' ) { + config.autoSlideMethod() + } + else { + 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({ type: 'autoslidepaused' }); + clearTimeout( autoSlideTimeout ); + + if( autoSlidePlayer ) { + autoSlidePlayer.setPlaying( false ); + } + } + + } + + function resumeAutoSlide() { + + if( autoSlide && autoSlidePaused ) { + autoSlidePaused = false; + dispatchEvent({ type: 'autoslideresumed' }); + cueAutoSlide(); + } + + } + + function navigateLeft({skipFragments=false}={}) { + + navigationHistory.hasNavigatedHorizontally = true; + + // Reverse for RTL + if( config.rtl ) { + if( ( overview.isActive() || skipFragments || fragments.next() === false ) && availableRoutes().left ) { + slide( indexh + 1, config.navigationMode === 'grid' ? indexv : undefined ); + } + } + // Normal navigation + else if( ( overview.isActive() || skipFragments || fragments.prev() === false ) && availableRoutes().left ) { + slide( indexh - 1, config.navigationMode === 'grid' ? indexv : undefined ); + } + + } + + function navigateRight({skipFragments=false}={}) { + + navigationHistory.hasNavigatedHorizontally = true; + + // Reverse for RTL + if( config.rtl ) { + if( ( overview.isActive() || skipFragments || fragments.prev() === false ) && availableRoutes().right ) { + slide( indexh - 1, config.navigationMode === 'grid' ? indexv : undefined ); + } + } + // Normal navigation + else if( ( overview.isActive() || skipFragments || fragments.next() === false ) && availableRoutes().right ) { + slide( indexh + 1, config.navigationMode === 'grid' ? indexv : undefined ); + } + + } + + function navigateUp({skipFragments=false}={}) { + + // Prioritize hiding fragments + if( ( overview.isActive() || skipFragments || fragments.prev() === false ) && availableRoutes().up ) { + slide( indexh, indexv - 1 ); + } + + } + + function navigateDown({skipFragments=false}={}) { + + navigationHistory.hasNavigatedVertically = true; + + // Prioritize revealing fragments + if( ( overview.isActive() || skipFragments || fragments.next() === 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({skipFragments=false}={}) { + + // Prioritize revealing fragments + if( skipFragments || fragments.prev() === false ) { + if( availableRoutes().up ) { + navigateUp({skipFragments}); + } + else { + // Fetch the previous horizontal slide, if there is one + let previousSlide; + + if( config.rtl ) { + previousSlide = Util.queryAll( dom.wrapper, HORIZONTAL_SLIDES_SELECTOR + '.future' ).pop(); + } + else { + previousSlide = Util.queryAll( dom.wrapper, HORIZONTAL_SLIDES_SELECTOR + '.past' ).pop(); + } + + // When going backwards and arriving on a stack we start + // at the bottom of the stack + if( previousSlide && previousSlide.classList.contains( 'stack' ) ) { + let v = ( previousSlide.querySelectorAll( 'section' ).length - 1 ) || undefined; + let h = indexh - 1; + slide( h, v ); + } + else { + navigateLeft({skipFragments}); + } + } + } + + } + + /** + * The reverse of #navigatePrev(). + */ + function navigateNext({skipFragments=false}={}) { + + navigationHistory.hasNavigatedHorizontally = true; + navigationHistory.hasNavigatedVertically = true; + + // Prioritize revealing fragments + if( skipFragments || fragments.next() === false ) { + + let 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 && isLastVerticalSlide() ) { + routes.down = false; + } + + if( routes.down ) { + navigateDown({skipFragments}); + } + else if( config.rtl ) { + navigateLeft({skipFragments}); + } + else { + navigateRight({skipFragments}); + } + } + + } + + + // --------------------------------------------------------------------// + // ----------------------------- EVENTS -------------------------------// + // --------------------------------------------------------------------// + + /** + * Called by all event handlers that are based on user + * input. + * + * @param {object} [event] + */ + function onUserInput( event ) { + + if( config.autoSlideStoppable ) { + pauseAutoSlide(); + } + + } + + /** + * Listener for post message events posted to this window. + */ + function onPostMessage( event ) { + + let 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' ) { + + if( POST_MESSAGE_METHOD_BLACKLIST.test( data.method ) === false ) { + + const result = Reveal[data.method].apply( Reveal, data.args ); + + // Dispatch a postMessage event with the returned value from + // our method invocation for getter functions + dispatchPostMessage( 'callback', { method: data.method, result: result } ); + + } + else { + console.warn( 'reveal.js: "'+ data.method +'" is is blacklisted from the postMessage API' ); + } + + } + } + + } + + /** + * Event listener for transition end on the current slide. + * + * @param {object} [event] + */ + function onTransitionEnd( event ) { + + if( transition === 'running' && /section/gi.test( event.target.nodeName ) ) { + transition = 'idle'; + dispatchEvent({ + type: 'slidetransitionend', + data: { indexh, indexv, previousSlide, currentSlide } + }); + } + + } + + /** + * A global listener for all click events inside of the + * .slides container. + * + * @param {object} [event] + */ + function onSlidesClicked( event ) { + + const anchor = Util.closest( event.target, 'a[href^="#"]' ); + + // If a hash link is clicked, we find the target slide + // and navigate to it. We previously relied on 'hashchange' + // for links like these but that prevented media with + // audio tracks from playing in mobile browsers since it + // wasn't considered a direct interaction with the document. + if( anchor ) { + const hash = anchor.getAttribute( 'href' ); + const indices = location.getIndicesFromHash( hash ); + + if( indices ) { + Reveal.slide( indices.h, indices.v, indices.f ); + event.preventDefault(); + } + } + + } + + /** + * 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 ) { + + // If, after clicking a link or similar and we're coming back, + // focus the document.body to ensure we can use keyboard shortcuts + if( document.hidden === 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(); + } + + } + + /** + * Handler for the document level 'fullscreenchange' event. + * + * @param {object} [event] + */ + function onFullscreenChange( event ) { + + let element = document.fullscreenElement || document.webkitFullscreenElement; + if( element === dom.wrapper ) { + event.stopImmediatePropagation(); + + // Timeout to avoid layout shift in Safari + setTimeout( () => { + Reveal.layout(); + Reveal.focus.focus(); // focus.focus :'( + }, 1 ); + } + + } + + /** + * 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' ) ) { + let 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( isLastSlide() && config.loop === false ) { + slide( 0, 0 ); + resumeAutoSlide(); + } + // Resume + else if( autoSlidePaused ) { + resumeAutoSlide(); + } + // Pause + else { + pauseAutoSlide(); + } + + } + + + // --------------------------------------------------------------------// + // ------------------------------- API --------------------------------// + // --------------------------------------------------------------------// + + // The public reveal.js API + const API = { + VERSION, + + initialize, + configure, + destroy, + + sync, + syncSlide, + syncFragments: fragments.sync.bind( fragments ), + + // Navigation methods + slide, + left: navigateLeft, + right: navigateRight, + up: navigateUp, + down: navigateDown, + prev: navigatePrev, + next: navigateNext, + + // Navigation aliases + navigateLeft, navigateRight, navigateUp, navigateDown, navigatePrev, navigateNext, + + // Fragment methods + navigateFragment: fragments.goto.bind( fragments ), + prevFragment: fragments.prev.bind( fragments ), + nextFragment: fragments.next.bind( fragments ), + + // Event binding + on, + off, + + // Legacy event binding methods left in for backwards compatibility + addEventListener: on, + removeEventListener: off, + + // Forces an update in slide layout + layout, + + // Randomizes the order of slides + shuffle, + + // Returns an object with the available routes as booleans (left/right/top/bottom) + availableRoutes, + + // Returns an object with the available fragments as booleans (prev/next) + availableFragments: fragments.availableRoutes.bind( fragments ), + + // Toggles a help overlay with keyboard shortcuts + toggleHelp, + + // Toggles the overview mode on/off + toggleOverview: overview.toggle.bind( overview ), + + // Toggles the "black screen" mode on/off + togglePause, + + // Toggles the auto slide mode on/off + toggleAutoSlide, + + // Toggles visibility of the jump-to-slide UI + toggleJumpToSlide, + + // Slide navigation checks + isFirstSlide, + isLastSlide, + isLastVerticalSlide, + isVerticalSlide, + + // State checks + isPaused, + isAutoSliding, + isSpeakerNotes: notes.isSpeakerNotesWindow.bind( notes ), + isOverview: overview.isActive.bind( overview ), + isFocused: focus.isFocused.bind( focus ), + isPrintingPDF: print.isPrintingPDF.bind( print ), + + // Checks if reveal.js has been loaded and is ready for use + isReady: () => ready, + + // Slide preloading + loadSlide: slideContent.load.bind( slideContent ), + unloadSlide: slideContent.unload.bind( slideContent ), + + // Preview management + showPreview, + hidePreview: closeOverlay, + + // Adds or removes all internal event listeners + addEventListeners, + removeEventListeners, + dispatchEvent, + + // Facility for persisting and restoring the presentation state + getState, + setState, + + // Presentation progress on range of 0-1 + getProgress, + + // Returns the indices of the current, or specified, slide + getIndices, + + // Returns an Array of key:value maps of the attributes of each + // slide in the deck + getSlidesAttributes, + + // Returns the number of slides that we have passed + getSlidePastCount, + + // Returns the total number of slides + getTotalSlides, + + // Returns the slide element at the specified index + getSlide, + + // Returns the previous slide element, may be null + getPreviousSlide: () => previousSlide, + + // Returns the current slide element + getCurrentSlide: () => currentSlide, + + // Returns the slide background element at the specified index + getSlideBackground, + + // Returns the speaker notes string for a slide, or null + getSlideNotes: notes.getSlideNotes.bind( notes ), + + // Returns an Array of all slides + getSlides, + + // Returns an array with all horizontal/vertical slides in the deck + getHorizontalSlides, + getVerticalSlides, + + // Checks if the presentation contains two or more horizontal + // and vertical slides + hasHorizontalSlides, + hasVerticalSlides, + + // Checks if the deck has navigated on either axis at least once + hasNavigatedHorizontally: () => navigationHistory.hasNavigatedHorizontally, + hasNavigatedVertically: () => navigationHistory.hasNavigatedVertically, + + // Adds/removes a custom key binding + addKeyBinding: keyboard.addKeyBinding.bind( keyboard ), + removeKeyBinding: keyboard.removeKeyBinding.bind( keyboard ), + + // Programmatically triggers a keyboard event + triggerKey: keyboard.triggerKey.bind( keyboard ), + + // Registers a new shortcut to include in the help overlay + registerKeyboardShortcut: keyboard.registerKeyboardShortcut.bind( keyboard ), + + getComputedSlideSize, + + // Returns the current scale of the presentation content + getScale: () => scale, + + // Returns the current configuration object + getConfig: () => config, + + // Helper method, retrieves query string as a key:value map + getQueryHash: Util.getQueryHash, + + // Returns the path to the current slide as represented in the URL + getSlidePath: location.getHash.bind( location ), + + // Returns reveal.js DOM elements + getRevealElement: () => revealElement, + getSlidesElement: () => dom.slides, + getViewportElement: () => dom.viewport, + getBackgroundsElement: () => backgrounds.element, + + // API for registering and retrieving plugins + registerPlugin: plugins.registerPlugin.bind( plugins ), + hasPlugin: plugins.hasPlugin.bind( plugins ), + getPlugin: plugins.getPlugin.bind( plugins ), + getPlugins: plugins.getRegisteredPlugins.bind( plugins ) + + }; + + // Our internal API which controllers have access to + Util.extend( Reveal, { + ...API, + + // Methods for announcing content to screen readers + announceStatus, + getStatusText, + + // Controllers + print, + focus, + progress, + controls, + location, + overview, + fragments, + slideContent, + slideNumber, + + onUserInput, + closeOverlay, + updateSlidesVisibility, + layoutSlideContents, + transformSlides, + cueAutoSlide, + cancelAutoSlide + } ); + + return API; + +}; diff --git a/present/js/utils/color.js b/present/js/utils/color.js new file mode 100644 index 0000000..edf67c4 --- /dev/null +++ b/present/js/utils/color.js @@ -0,0 +1,77 @@ +/** + * 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} + */ +export const colorToRgb = ( color ) => { + + let 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 + }; + } + + let hex6 = color.match( /^#([0-9a-f]{6})$/i ); + if( hex6 && hex6[1] ) { + hex6 = hex6[1]; + return { + r: parseInt( hex6.slice( 0, 2 ), 16 ), + g: parseInt( hex6.slice( 2, 4 ), 16 ), + b: parseInt( hex6.slice( 4, 6 ), 16 ) + }; + } + + let 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 ) + }; + } + + let 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} + */ +export const colorBrightness = ( color ) => { + + if( typeof color === 'string' ) color = colorToRgb( color ); + + if( color ) { + return ( color.r * 299 + color.g * 587 + color.b * 114 ) / 1000; + } + + return null; + +}
\ No newline at end of file diff --git a/present/js/utils/constants.js b/present/js/utils/constants.js new file mode 100644 index 0000000..43fcb84 --- /dev/null +++ b/present/js/utils/constants.js @@ -0,0 +1,10 @@ + +export const SLIDES_SELECTOR = '.slides section'; +export const HORIZONTAL_SLIDES_SELECTOR = '.slides>section'; +export const VERTICAL_SLIDES_SELECTOR = '.slides>section.present>section'; + +// Methods that may not be invoked via the postMessage API +export const POST_MESSAGE_METHOD_BLACKLIST = /registerPlugin|registerKeyboardShortcut|addKeyBinding|addEventListener|showPreview/; + +// Regex for retrieving the fragment style from a class attribute +export const FRAGMENT_STYLE_REGEX = /fade-(down|up|right|left|out|in-then-out|in-then-semi-out)|semi-fade-out|current-visible|shrink|grow/;
\ No newline at end of file diff --git a/present/js/utils/device.js b/present/js/utils/device.js new file mode 100644 index 0000000..f2bce20 --- /dev/null +++ b/present/js/utils/device.js @@ -0,0 +1,8 @@ +const UA = navigator.userAgent; + +export const isMobile = /(iphone|ipod|ipad|android)/gi.test( UA ) || + ( navigator.platform === 'MacIntel' && navigator.maxTouchPoints > 1 ); // iPadOS + +export const isChrome = /chrome/i.test( UA ) && !/edge/i.test( UA ); + +export const isAndroid = /android/gi.test( UA );
\ No newline at end of file diff --git a/present/js/utils/loader.js b/present/js/utils/loader.js new file mode 100644 index 0000000..58d39ac --- /dev/null +++ b/present/js/utils/loader.js @@ -0,0 +1,46 @@ +/** + * 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 + */ +export const loadScript = ( url, callback ) => { + + const script = document.createElement( 'script' ); + script.type = 'text/javascript'; + script.async = false; + script.defer = false; + script.src = url; + + if( typeof callback === 'function' ) { + + // Success callback + script.onload = script.onreadystatechange = 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 = 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> + const head = document.querySelector( 'head' ); + head.insertBefore( script, head.lastChild ); + +}
\ No newline at end of file diff --git a/present/js/utils/util.js b/present/js/utils/util.js new file mode 100644 index 0000000..a5515e8 --- /dev/null +++ b/present/js/utils/util.js @@ -0,0 +1,313 @@ +/** + * Extend object a with the properties of object b. + * If there's a conflict, object b takes precedence. + * + * @param {object} a + * @param {object} b + */ +export const extend = ( a, b ) => { + + for( let i in b ) { + a[ i ] = b[ i ]; + } + + return a; + +} + +/** + * querySelectorAll but returns an Array. + */ +export const queryAll = ( el, selector ) => { + + return Array.from( el.querySelectorAll( selector ) ); + +} + +/** + * classList.toggle() with cross browser support + */ +export const toggleClass = ( el, className, value ) => { + if( value ) { + el.classList.add( className ); + } + else { + el.classList.remove( className ); + } +} + +/** + * Utility for deserializing a value. + * + * @param {*} value + * @return {*} + */ +export const 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} + */ +export const distanceBetween = ( a, b ) => { + + let 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 + */ +export const transformElement = ( element, transform ) => { + + element.style.transform = transform; + +} + +/** + * Element.matches with IE support. + * + * @param {HTMLElement} target The element to match + * @param {String} selector The CSS selector to match + * the element against + * + * @return {Boolean} + */ +export const matches = ( target, selector ) => { + + let matchesMethod = target.matches || target.matchesSelector || target.msMatchesSelector; + + return !!( matchesMethod && matchesMethod.call( target, selector ) ); + +} + +/** + * 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 + */ +export const closest = ( target, selector ) => { + + // Native Element.closest + if( typeof target.closest === 'function' ) { + return target.closest( selector ); + } + + // Polyfill + while( target ) { + if( matches( target, selector ) ) { + return target; + } + + // Keep searching + target = target.parentNode; + } + + return null; + +} + +/** + * 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 + */ +export const enterFullscreen = element => { + + element = element || document.documentElement; + + // Check which implementation is available + let requestMethod = element.requestFullscreen || + element.webkitRequestFullscreen || + element.webkitRequestFullScreen || + element.mozRequestFullScreen || + element.msRequestFullscreen; + + if( requestMethod ) { + requestMethod.apply( element ); + } + +} + +/** + * 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} + */ +export const createSingletonNode = ( container, tagname, classname, innerHTML='' ) => { + + // Find all nodes matching the description + let nodes = container.querySelectorAll( '.' + classname ); + + // Check all matches to find one which is a direct child of + // the specified container + for( let i = 0; i < nodes.length; i++ ) { + let testNode = nodes[i]; + if( testNode.parentNode === container ) { + return testNode; + } + } + + // If no node was found, create it now + let node = document.createElement( tagname ); + node.className = classname; + node.innerHTML = innerHTML; + container.appendChild( node ); + + return node; + +} + +/** + * Injects the given CSS styles into the DOM. + * + * @param {string} value + */ +export const createStyleSheet = ( value ) => { + + let tag = document.createElement( 'style' ); + tag.type = 'text/css'; + + if( value && value.length > 0 ) { + if( tag.styleSheet ) { + tag.styleSheet.cssText = value; + } + else { + tag.appendChild( document.createTextNode( value ) ); + } + } + + document.head.appendChild( tag ); + + return tag; + +} + +/** + * Returns a key:value hash of all query params. + */ +export const getQueryHash = () => { + + let query = {}; + + location.search.replace( /[A-Z0-9]+?=([\w\.%-]*)/gi, a => { + query[ a.split( '=' ).shift() ] = a.split( '=' ).pop(); + } ); + + // Basic deserialization + for( let i in query ) { + let value = query[ i ]; + + query[ i ] = deserialize( unescape( value ) ); + } + + // Do not accept new dependencies via query config to avoid + // the potential of malicious script injection + if( typeof query['dependencies'] !== 'undefined' ) delete query['dependencies']; + + return query; + +} + +/** + * 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] + */ +export const getRemainingHeight = ( element, height = 0 ) => { + + if( element ) { + let 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; + +} + +const fileExtensionToMimeMap = { + 'mp4': 'video/mp4', + 'm4a': 'video/mp4', + 'ogv': 'video/ogg', + 'mpeg': 'video/mpeg', + 'webm': 'video/webm' +} + +/** + * Guess the MIME type for common file formats. + */ +export const getMimeTypeFromFile = ( filename='' ) => { + return fileExtensionToMimeMap[filename.split('.').pop()] +} + +/** + * Encodes a string for RFC3986-compliant URL format. + * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/encodeURI#encoding_for_rfc3986 + * + * @param {string} url + */ +export const encodeRFC3986URI = ( url='' ) => { + return encodeURI(url) + .replace(/%5B/g, "[") + .replace(/%5D/g, "]") + .replace( + /[!'()*]/g, + (c) => `%${c.charCodeAt(0).toString(16).toUpperCase()}` + ); +}
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