From 5a5a5c9a6c47ae166e75cd09b950f34727f12e9f Mon Sep 17 00:00:00 2001 From: Hakim El Hattab Date: Wed, 11 Mar 2020 08:13:53 +0100 Subject: [PATCH] break touch interaction into own module --- dist/reveal.min.js | 4 +- gulpfile.js | 1 + js/controllers/location.js | 4 +- js/controllers/slidenumber.js | 4 +- js/controllers/touch.js | 255 ++++++++++++++++++++++++++++++++++ js/reveal.js | 247 +++----------------------------- 6 files changed, 279 insertions(+), 236 deletions(-) create mode 100644 js/controllers/touch.js diff --git a/dist/reveal.min.js b/dist/reveal.min.js index c5f903d..066efe1 100644 --- a/dist/reveal.min.js +++ b/dist/reveal.min.js @@ -1,8 +1,8 @@ /*! -* reveal.js 4.0.0-dev (Tue Mar 10 2020) +* reveal.js 4.0.0-dev (Wed Mar 11 2020) * https://revealjs.com * MIT licensed * * Copyright (C) 2020 Hakim El Hattab, https://hakim.se */ -!function(e){var t={};function a(i){if(t[i])return t[i].exports;var n=t[i]={i:i,l:!1,exports:{}};return 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\ No newline at end of file diff --git a/gulpfile.js b/gulpfile.js index b1f5d0e..69abfc1 100644 --- a/gulpfile.js +++ b/gulpfile.js @@ -87,6 +87,7 @@ gulp.task('serve', () => { connect.server({ root: root, port: port, + host: '0.0.0.0', livereload: true }) diff --git a/js/controllers/location.js b/js/controllers/location.js index 46e0b2d..3b66876 100644 --- a/js/controllers/location.js +++ b/js/controllers/location.js @@ -1,7 +1,5 @@ -import { enterFullscreen } from '../utils/util.js' - /** - * Handles all reveal.js keyboard interactions. + * Reads and writes the URL based on reveal.js' current state. */ export default class Location { diff --git a/js/controllers/slidenumber.js b/js/controllers/slidenumber.js index a2beeef..ad6d44e 100644 --- a/js/controllers/slidenumber.js +++ b/js/controllers/slidenumber.js @@ -1,7 +1,5 @@ -import { enterFullscreen } from '../utils/util.js' - /** - * Handles all reveal.js keyboard interactions. + * Handles the display of reveal.js' optional slide number. */ export default class SlideNumber { diff --git a/js/controllers/touch.js b/js/controllers/touch.js new file mode 100644 index 0000000..c1e1292 --- /dev/null +++ b/js/controllers/touch.js @@ -0,0 +1,255 @@ +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() { + + var 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() { + + var 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 ) { + + 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 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 ) { + this.touchCaptured = true; + if( config.navigationMode === 'linear' ) { + this.Reveal.prev()(); + } + else { + this.Reveal.up(); + } + } + else if( deltaY < -SWIPE_THRESHOLD ) { + 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( currentSlide ) ) { + event.preventDefault(); + } + } + // Not embedded? Block them all to avoid needless tossing + // around of the viewport in iOS + else { + event.preventDefault(); + } + + } + } + // There's a bug with swiping on some Android devices unless + // the default action is always prevented + else if( 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/js/reveal.js b/js/reveal.js index 96ddb67..8d23765 100644 --- a/js/reveal.js +++ b/js/reveal.js @@ -6,8 +6,11 @@ import Overview from './controllers/overview.js' import Keyboard from './controllers/keyboard.js' import Location from './controllers/location.js' import Plugins from './controllers/plugins.js' +import Touch from './controllers/touch.js' import Playback from './components/playback.js' import defaultConfig from './config.js' +import { isMobile, isChrome, isAndroid, supportsZoom } from './utils/device.js' +import { colorToRgb, colorBrightness } from './utils/color.js' import { SLIDES_SELECTOR, HORIZONTAL_SLIDES_SELECTOR, @@ -26,8 +29,6 @@ import { enterFullscreen, getQueryHash } from './utils/util.js' -import { isMobile, isChrome, isAndroid, supportsZoom } from './utils/device.js' -import { colorToRgb, colorBrightness } from './utils/color.js' /** * reveal.js @@ -71,16 +72,6 @@ export default function( revealElement, options ) { // 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 = {}, - - // Controller for plugin loading - plugins = new Plugins(), - // Controls loading and playback of slide content slideContent = new SlideContent( Reveal ), @@ -102,6 +93,19 @@ export default function( revealElement, options ) { // Controls the current location/URL location = new Location( Reveal ), + // Controller for plugin loading + plugins = new Plugins(), + + // Controls touch/swipe navigation for our deck + touch = new Touch( Reveal ), + + // CSS transform that is currently applied to the slides container, + // split into two groups + slidesTransform = { layout: '', overview: '' }, + + // Cached references to DOM elements + dom = {}, + // List of asynchronously loaded reveal.js dependencies asyncDependencies = [], @@ -124,16 +128,7 @@ export default function( revealElement, options ) { autoSlidePlayer, autoSlideTimeout = 0, autoSlideStartTime = -1, - autoSlidePaused = false, - - // Holds information about the currently ongoing touch input - touch = { - startX: 0, - startY: 0, - startCount: 0, - captured: false, - threshold: 40 - }; + autoSlidePaused = false; /** * Starts up the presentation if the client is capable. @@ -922,24 +917,7 @@ export default function( revealElement, options ) { window.addEventListener( 'resize', onWindowResize, false ); if( config.touch ) { - if( 'onpointerdown' in window ) { - // Use W3C pointer events - dom.wrapper.addEventListener( 'pointerdown', onPointerDown, false ); - dom.wrapper.addEventListener( 'pointermove', onPointerMove, false ); - dom.wrapper.addEventListener( 'pointerup', onPointerUp, false ); - } - else if( window.navigator.msPointerEnabled ) { - // IE 10 uses prefixed version of pointer events - dom.wrapper.addEventListener( 'MSPointerDown', onPointerDown, false ); - dom.wrapper.addEventListener( 'MSPointerMove', onPointerMove, false ); - dom.wrapper.addEventListener( 'MSPointerUp', onPointerUp, false ); - } - else { - // Fall back to touch events - dom.wrapper.addEventListener( 'touchstart', onTouchStart, false ); - dom.wrapper.addEventListener( 'touchmove', onTouchMove, false ); - dom.wrapper.addEventListener( 'touchend', onTouchEnd, false ); - } + touch.bind(); } if( config.keyboard ) { @@ -984,23 +962,12 @@ export default function( revealElement, options ) { eventsAreBound = false; + touch.unbind(); keyboard.unbind(); window.removeEventListener( 'hashchange', onWindowHashChange, false ); window.removeEventListener( 'resize', onWindowResize, false ); - dom.wrapper.removeEventListener( 'pointerdown', onPointerDown, false ); - dom.wrapper.removeEventListener( 'pointermove', onPointerMove, false ); - dom.wrapper.removeEventListener( 'pointerup', onPointerUp, false ); - - dom.wrapper.removeEventListener( 'MSPointerDown', onPointerDown, false ); - dom.wrapper.removeEventListener( 'MSPointerMove', onPointerMove, false ); - dom.wrapper.removeEventListener( 'MSPointerUp', onPointerUp, false ); - - dom.wrapper.removeEventListener( 'touchstart', onTouchStart, false ); - dom.wrapper.removeEventListener( 'touchmove', onTouchMove, false ); - dom.wrapper.removeEventListener( 'touchend', onTouchEnd, false ); - dom.pauseOverlay.removeEventListener( 'click', resume, false ); if ( config.progress && dom.progress ) { @@ -3121,21 +3088,6 @@ export default function( revealElement, options ) { } - /** - * Checks if the target element prevents the triggering of - * swipe navigation. - */ - function isSwipePrevented( target ) { - - while( target && typeof target.hasAttribute === 'function' ) { - if( target.hasAttribute( 'data-prevent-swipe' ) ) return true; - target = target.parentNode; - } - - return false; - - } - // --------------------------------------------------------------------// // ----------------------------- EVENTS -------------------------------// @@ -3171,167 +3123,6 @@ export default function( revealElement, options ) { } - /** - * Handler for the 'touchstart' event, enables support for - * swipe and pinch gestures. - * - * @param {object} event - */ - function onTouchStart( event ) { - - if( isSwipePrevented( event.target ) ) return true; - - touch.startX = event.touches[0].clientX; - touch.startY = event.touches[0].clientY; - touch.startCount = event.touches.length; - - } - - /** - * Handler for the 'touchmove' event. - * - * @param {object} event - */ - function onTouchMove( event ) { - - if( isSwipePrevented( event.target ) ) return true; - - // Each touch should only trigger one action - if( !touch.captured ) { - onUserInput( event ); - - 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 && touch.startCount !== 2 ) { - - let deltaX = currentX - touch.startX, - deltaY = currentY - touch.startY; - - if( deltaX > touch.threshold && Math.abs( deltaX ) > Math.abs( deltaY ) ) { - touch.captured = true; - if( config.navigationMode === 'linear' ) { - if( config.rtl ) { - navigateNext(); - } - else { - navigatePrev(); - } - } - else { - navigateLeft(); - } - } - else if( deltaX < -touch.threshold && Math.abs( deltaX ) > Math.abs( deltaY ) ) { - touch.captured = true; - if( config.navigationMode === 'linear' ) { - if( config.rtl ) { - navigatePrev(); - } - else { - navigateNext(); - } - } - else { - navigateRight(); - } - } - else if( deltaY > touch.threshold ) { - touch.captured = true; - if( config.navigationMode === 'linear' ) { - navigatePrev(); - } - else { - navigateUp(); - } - } - else if( deltaY < -touch.threshold ) { - touch.captured = true; - if( config.navigationMode === 'linear' ) { - navigateNext(); - } - else { - navigateDown(); - } - } - - // If we're embedded, only block touch events if they have - // triggered an action - if( config.embedded ) { - if( touch.captured || isVerticalSlide( currentSlide ) ) { - event.preventDefault(); - } - } - // Not embedded? Block them all to avoid needless tossing - // around of the viewport in iOS - else { - event.preventDefault(); - } - - } - } - // There's a bug with swiping on some Android devices unless - // the default action is always prevented - else if( isAndroid ) { - event.preventDefault(); - } - - } - - /** - * Handler for the 'touchend' event. - * - * @param {object} event - */ - function onTouchEnd( event ) { - - touch.captured = false; - - } - - /** - * Convert pointer down to touch start. - * - * @param {object} event - */ - function onPointerDown( event ) { - - if( event.pointerType === event.MSPOINTER_TYPE_TOUCH || event.pointerType === "touch" ) { - event.touches = [{ clientX: event.clientX, clientY: event.clientY }]; - onTouchStart( event ); - } - - } - - /** - * Convert pointer move to touch move. - * - * @param {object} event - */ - function onPointerMove( event ) { - - if( event.pointerType === event.MSPOINTER_TYPE_TOUCH || event.pointerType === "touch" ) { - event.touches = [{ clientX: event.clientX, clientY: event.clientY }]; - onTouchMove( event ); - } - - } - - /** - * Convert pointer up to touch end. - * - * @param {object} event - */ - function onPointerUp( event ) { - - if( event.pointerType === event.MSPOINTER_TYPE_TOUCH || event.pointerType === "touch" ) { - event.touches = [{ clientX: event.clientX, clientY: event.clientY }]; - onTouchEnd( event ); - } - - } - /** * Handles mouse wheel scrolling, throttled to avoid skipping * multiple slides.