diff options
Diffstat (limited to 'js')
| -rw-r--r-- | js/reveal.js | 270 |
1 files changed, 195 insertions, 75 deletions
diff --git a/js/reveal.js b/js/reveal.js index 43c599c..8655f51 100644 --- a/js/reveal.js +++ b/js/reveal.js @@ -3,7 +3,7 @@ * http://lab.hakim.se/reveal-js * MIT licensed * - * Copyright (C) 2016 Hakim El Hattab, http://hakim.se + * Copyright (C) 2017 Hakim El Hattab, http://hakim.se */ (function( root, factory ) { if( typeof define === 'function' && define.amd ) { @@ -58,6 +58,9 @@ // Display the page number of the current slide slideNumber: false, + // Determine which displays to show the slide number on + showSlideNumber: 'all', + // Push each slide change to the browser history history: false, @@ -102,6 +105,12 @@ // Flags if speaker notes should be visible to all viewers showNotes: false, + // Global override for autolaying 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, + // Number of milliseconds between automatically proceeding to the // next slide, disabled when set to 0, this value can be overwritten // by using a data-autoslide attribute on your slides @@ -157,9 +166,19 @@ // to PDF, unlimited by default pdfMaxPagesPerSlide: Number.POSITIVE_INFINITY, + // 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, + // The display mode that will be used to show slides + display: 'block', + // Script dependencies to load dependencies: [] @@ -605,7 +624,7 @@ slideHeight = slideSize.height; // Let the browser know what page size we want to print - injectStyleSheet( '@page{size:'+ pageWidth +'px '+ pageHeight +'px; margin: 0 0 -1px 0;}' ); + injectStyleSheet( '@page{size:'+ pageWidth +'px '+ pageHeight +'px; margin: 0px;}' ); // Limit the size of certain elements to the dimensions of the slide injectStyleSheet( '.reveal section>img, .reveal section>video, .reveal section>iframe{max-width: '+ slideWidth +'px; max-height:'+ slideHeight +'px}' ); @@ -614,6 +633,9 @@ document.body.style.width = pageWidth + 'px'; document.body.style.height = pageHeight + 'px'; + // Make sure stretch elements fit on slide + layoutSlideContents( slideWidth, slideHeight ); + // Add each slide's index as attributes on itself, we need these // indices to generate slide numbers below toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ).forEach( function( hslide, h ) { @@ -652,7 +674,7 @@ // so that no page ever flows onto another var page = document.createElement( 'div' ); page.className = 'pdf-page'; - page.style.height = ( pageHeight * numberOfPages ) + 'px'; + page.style.height = ( ( pageHeight + config.pdfPageHeightOffset ) * numberOfPages ) + 'px'; slide.parentNode.insertBefore( page, slide ); page.appendChild( slide ); @@ -695,7 +717,7 @@ } // Inject slide numbers if `slideNumbers` are enabled - if( config.slideNumber ) { + if( config.slideNumber && /all|print/i.test( config.showSlideNumber ) ) { var slideNumberH = parseInt( slide.getAttribute( 'data-index-h' ), 10 ) + 1, slideNumberV = parseInt( slide.getAttribute( 'data-index-v' ), 10 ) + 1; @@ -859,7 +881,7 @@ if( data.background ) { // Auto-wrap image urls in url(...) - if( /^(http|file|\/\/)/gi.test( data.background ) || /\.(svg|png|jpg|jpeg|gif|bmp)$/gi.test( data.background ) ) { + if( /^(http|file|\/\/)/gi.test( data.background ) || /\.(svg|png|jpg|jpeg|gif|bmp)([?#]|$)/gi.test( data.background ) ) { slide.setAttribute( 'data-background-image', data.background ); } else { @@ -884,6 +906,7 @@ // Additional and optional background properties if( data.backgroundSize ) element.style.backgroundSize = data.backgroundSize; + if( data.backgroundSize ) element.setAttribute( 'data-background-size', data.backgroundSize ); if( data.backgroundColor ) element.style.backgroundColor = data.backgroundColor; if( data.backgroundRepeat ) element.style.backgroundRepeat = data.backgroundRepeat; if( data.backgroundPosition ) element.style.backgroundPosition = data.backgroundPosition; @@ -977,7 +1000,6 @@ dom.controls.style.display = config.controls ? 'block' : 'none'; dom.progress.style.display = config.progress ? 'block' : 'none'; - dom.slideNumber.style.display = config.slideNumber && !isPrintingPDF() ? 'block' : 'none'; if( config.shuffle ) { shuffle(); @@ -1030,10 +1052,11 @@ // Iframe link previews if( config.previewLinks ) { enablePreviewLinks(); + disablePreviewLinks( '[data-preview-link=false]' ); } else { disablePreviewLinks(); - enablePreviewLinks( '[data-preview-link]' ); + enablePreviewLinks( '[data-preview-link]:not([data-preview-link=false])' ); } // Remove existing auto-slide controls @@ -1060,6 +1083,19 @@ } ); } + // Slide numbers + var slideNumberDisplay = 'none'; + if( config.slideNumber && !isPrintingPDF() ) { + if( config.showSlideNumber === 'all' ) { + slideNumberDisplay = 'block'; + } + else if( config.showSlideNumber === 'speaker' && isSpeakerNotes() ) { + slideNumberDisplay = 'block'; + } + } + + dom.slideNumber.style.display = slideNumberDisplay; + sync(); } @@ -1225,7 +1261,7 @@ if( value === 'null' ) return null; else if( value === 'true' ) return true; else if( value === 'false' ) return false; - else if( value.match( /^\d+$/ ) ) return parseFloat( value ); + else if( value.match( /^[\d\.]+$/ ) ) return parseFloat( value ); } return value; @@ -1569,9 +1605,9 @@ /** * Unbind preview frame links. */ - function disablePreviewLinks() { + function disablePreviewLinks( selector ) { - var anchors = toArray( document.querySelectorAll( 'a' ) ); + var anchors = toArray( document.querySelectorAll( selector ? selector : 'a' ) ); anchors.forEach( function( element ) { if( /^(http|www)/gi.test( element.getAttribute( 'href' ) ) ) { @@ -1629,6 +1665,28 @@ } /** + * 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() { @@ -1770,6 +1828,10 @@ updateProgress(); updateParallax(); + if( isOverview() ) { + updateOverview(); + } + } } @@ -1985,11 +2047,14 @@ */ function updateOverview() { + var vmin = Math.min( window.innerWidth, window.innerHeight ); + var scale = Math.max( vmin / 5, 150 ) / vmin; + transformSlides( { overview: [ + 'scale('+ scale +')', 'translateX('+ ( -indexh * overviewSlideWidth ) +'px)', - 'translateY('+ ( -indexv * overviewSlideHeight ) +'px)', - 'translateZ('+ ( window.innerWidth < 400 ? -1000 : -2500 ) +'px)' + 'translateY('+ ( -indexv * overviewSlideHeight ) +'px)' ].join( ' ' ) } ); @@ -2395,13 +2460,20 @@ updateControls(); updateProgress(); - updateBackground( true ); updateSlideNumber(); updateSlidesVisibility(); + updateBackground( true ); updateNotes(); formatEmbeddedContent(); - startEmbeddedContent( currentSlide ); + + // Start or stop embedded content depending on global config + if( config.autoPlayMedia === false ) { + stopEmbeddedContent( currentSlide ); + } + else { + startEmbeddedContent( currentSlide ); + } if( isOverview() ) { layoutOverview(); @@ -2873,34 +2945,17 @@ } ); - // Stop any currently playing video background + // Stop content inside of previous backgrounds if( previousBackground ) { - var previousVideo = previousBackground.querySelector( 'video' ); - if( previousVideo ) previousVideo.pause(); + stopEmbeddedContent( previousBackground ); } + // Start content in the current background if( currentBackground ) { - // Start video playback - var currentVideo = currentBackground.querySelector( 'video' ); - if( currentVideo ) { - - var startVideo = function() { - currentVideo.currentTime = 0; - currentVideo.play(); - currentVideo.removeEventListener( 'loadeddata', startVideo ); - }; - - if( currentVideo.readyState > 1 ) { - startVideo(); - } - else { - currentVideo.addEventListener( 'loadeddata', startVideo ); - } - - } + startEmbeddedContent( currentBackground ); var backgroundImageURL = currentBackground.style.backgroundImage || ''; @@ -3009,7 +3064,7 @@ function showSlide( slide ) { // Show the slide element - slide.style.display = 'block'; + slide.style.display = config.display; // Media elements with data-src attributes toArray( slide.querySelectorAll( 'img[data-src], video[data-src], audio[data-src]' ) ).forEach( function( element ) { @@ -3079,11 +3134,23 @@ // Iframes else if( backgroundIframe ) { var iframe = document.createElement( 'iframe' ); + iframe.setAttribute( 'allowfullscreen', '' ); + iframe.setAttribute( 'mozallowfullscreen', '' ); + iframe.setAttribute( 'webkitallowfullscreen', '' ); + + // Only load autoplaying content when the slide is shown to + // avoid having it play in the background + if( /autoplay=(1|true|yes)/gi.test( backgroundIframe ) ) { + iframe.setAttribute( 'data-src', backgroundIframe ); + } + else { iframe.setAttribute( 'src', backgroundIframe ); - iframe.style.width = '100%'; - iframe.style.height = '100%'; - iframe.style.maxHeight = '100%'; - iframe.style.maxWidth = '100%'; + } + + iframe.style.width = '100%'; + iframe.style.height = '100%'; + iframe.style.maxHeight = '100%'; + iframe.style.maxWidth = '100%'; background.appendChild( iframe ); } @@ -3191,11 +3258,12 @@ * Start playback of any embedded content inside of * the given element. * - * @param {HTMLElement} slide + * @param {HTMLElement} element */ function startEmbeddedContent( element ) { if( element && !isSpeakerNotes() ) { + // Restart GIFs toArray( element.querySelectorAll( 'img[src$=".gif"]' ) ).forEach( function( el ) { // Setting the same unchanged source like this was confirmed @@ -3209,8 +3277,25 @@ return; } - if( el.hasAttribute( 'data-autoplay' ) && typeof el.play === 'function' ) { - el.play(); + // Prefer an explicit global autoplay setting + var autoplay = config.autoPlayMedia; + + // If no global setting is available, fall back on the element's + // own autoplay setting + if( typeof autoplay !== 'boolean' ) { + autoplay = el.hasAttribute( 'data-autoplay' ) || !!closestParent( el, '.slide-background' ); + } + + if( autoplay && typeof el.play === 'function' ) { + + if( el.readyState > 1 ) { + startEmbeddedMedia( { target: el } ); + } + else { + el.removeEventListener( 'loadeddata', startEmbeddedMedia ); // remove first to avoid dupes + el.addEventListener( 'loadeddata', startEmbeddedMedia ); + } + } } ); @@ -3235,15 +3320,36 @@ el.setAttribute( 'src', el.getAttribute( 'data-src' ) ); } } ); + } } /** + * Starts playing an embedded video/audio element after + * it has finished loading. + * + * @param {object} event + */ + function startEmbeddedMedia( event ) { + + var isAttachedToDOM = !!closestParent( event.target, 'html' ), + isVisible = !!closestParent( event.target, '.present' ); + + if( isAttachedToDOM && isVisible ) { + event.target.currentTime = 0; + event.target.play(); + } + + event.target.removeEventListener( 'loadeddata', startEmbeddedMedia ); + + } + + /** * "Starts" the content of an embedded iframe using the * postMessage API. * - * @param {object} event - postMessage API event + * @param {object} event */ function startEmbeddedIframe( event ) { @@ -3251,17 +3357,33 @@ if( iframe && iframe.contentWindow ) { - // YouTube postMessage API - if( /youtube\.com\/embed\//.test( iframe.getAttribute( 'src' ) ) && iframe.hasAttribute( 'data-autoplay' ) ) { - iframe.contentWindow.postMessage( '{"event":"command","func":"playVideo","args":""}', '*' ); - } - // Vimeo postMessage API - else if( /player\.vimeo\.com\//.test( iframe.getAttribute( 'src' ) ) && iframe.hasAttribute( 'data-autoplay' ) ) { - iframe.contentWindow.postMessage( '{"method":"play"}', '*' ); - } - // Generic postMessage API - else { - iframe.contentWindow.postMessage( 'slide:start', '*' ); + var isAttachedToDOM = !!closestParent( event.target, 'html' ), + isVisible = !!closestParent( event.target, '.present' ); + + if( isAttachedToDOM && isVisible ) { + + // Prefer an explicit global autoplay setting + var autoplay = config.autoPlayMedia; + + // If no global setting is available, fall back on the element's + // own autoplay setting + if( typeof autoplay !== 'boolean' ) { + autoplay = iframe.hasAttribute( 'data-autoplay' ) || !!closestParent( iframe, '.slide-background' ); + } + + // YouTube postMessage API + if( /youtube\.com\/embed\//.test( iframe.getAttribute( 'src' ) ) && autoplay ) { + iframe.contentWindow.postMessage( '{"event":"command","func":"playVideo","args":""}', '*' ); + } + // Vimeo postMessage API + else if( /player\.vimeo\.com\//.test( iframe.getAttribute( 'src' ) ) && autoplay ) { + iframe.contentWindow.postMessage( '{"method":"play"}', '*' ); + } + // Generic postMessage API + else { + iframe.contentWindow.postMessage( 'slide:start', '*' ); + } + } } @@ -3272,40 +3394,43 @@ * Stop playback of any embedded content inside of * the targeted slide. * - * @param {HTMLElement} slide + * @param {HTMLElement} element + * @param {boolean} autoplay Optionally override the + * autoplay setting of media elements */ - function stopEmbeddedContent( slide ) { + function stopEmbeddedContent( element, autoplay ) { - if( slide && slide.parentNode ) { + if( element && element.parentNode ) { // HTML5 media elements - toArray( slide.querySelectorAll( 'video, audio' ) ).forEach( function( el ) { + toArray( element.querySelectorAll( 'video, audio' ) ).forEach( function( el ) { if( !el.hasAttribute( 'data-ignore' ) && typeof el.pause === 'function' ) { + el.setAttribute('data-paused-by-reveal', ''); el.pause(); } } ); // Generic postMessage API for non-lazy loaded iframes - toArray( slide.querySelectorAll( 'iframe' ) ).forEach( function( el ) { - el.contentWindow.postMessage( 'slide:stop', '*' ); + toArray( element.querySelectorAll( 'iframe' ) ).forEach( function( el ) { + if( el.contentWindow ) el.contentWindow.postMessage( 'slide:stop', '*' ); el.removeEventListener( 'load', startEmbeddedIframe ); }); // YouTube postMessage API - toArray( slide.querySelectorAll( 'iframe[src*="youtube.com/embed/"]' ) ).forEach( function( el ) { - if( !el.hasAttribute( 'data-ignore' ) && typeof el.contentWindow.postMessage === 'function' ) { + toArray( element.querySelectorAll( 'iframe[src*="youtube.com/embed/"]' ) ).forEach( function( el ) { + if( !el.hasAttribute( 'data-ignore' ) && el.contentWindow && typeof el.contentWindow.postMessage === 'function' ) { el.contentWindow.postMessage( '{"event":"command","func":"pauseVideo","args":""}', '*' ); } }); // Vimeo postMessage API - toArray( slide.querySelectorAll( 'iframe[src*="player.vimeo.com/"]' ) ).forEach( function( el ) { - if( !el.hasAttribute( 'data-ignore' ) && typeof el.contentWindow.postMessage === 'function' ) { + toArray( element.querySelectorAll( 'iframe[src*="player.vimeo.com/"]' ) ).forEach( function( el ) { + if( !el.hasAttribute( 'data-ignore' ) && el.contentWindow && typeof el.contentWindow.postMessage === 'function' ) { el.contentWindow.postMessage( '{"method":"pause"}', '*' ); } }); // Lazy loading iframes - toArray( slide.querySelectorAll( 'iframe[data-src]' ) ).forEach( function( el ) { + toArray( element.querySelectorAll( 'iframe[data-src]' ) ).forEach( function( el ) { // Only removing the src doesn't actually unload the frame // in all browsers (Firefox) so we set it to blank first el.setAttribute( 'src', 'about:blank' ); @@ -4115,12 +4240,7 @@ // Check if the pressed key is question mark if( event.shiftKey && event.charCode === 63 ) { - if( dom.overlay ) { - closeOverlay(); - } - else { - showHelp( true ); - } + toggleHelp(); } } @@ -4818,9 +4938,6 @@ navigatePrev: navigatePrev, navigateNext: navigateNext, - // Shows a help overlay with keyboard shortcuts - showHelp: showHelp, - // Forces an update in slide layout layout: layout, @@ -4833,6 +4950,9 @@ // Returns an object with the available fragments as booleans (prev/next) availableFragments: availableFragments, + // Toggles a help overlay with keyboard shortcuts + toggleHelp: toggleHelp, + // Toggles the overview mode on/off toggleOverview: toggleOverview, |