biofriction-wp-theme/node_modules/foundation-sites/js/foundation.util.touch.js

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2021-10-26 14:18:09 +02:00
//**************************************************
//**Work inspired by multiple jquery swipe plugins**
//**Done by Yohai Ararat ***************************
//**************************************************
import $ from 'jquery';
var Touch = {};
var startPosX,
startPosY,
startTime,
elapsedTime,
startEvent,
isMoving = false,
didMoved = false;
function onTouchEnd(e) {
this.removeEventListener('touchmove', onTouchMove);
this.removeEventListener('touchend', onTouchEnd);
// If the touch did not move, consider it as a "tap"
if (!didMoved) {
var tapEvent = $.Event('tap', startEvent || e);
$(this).trigger(tapEvent);
}
startEvent = null;
isMoving = false;
didMoved = false;
}
function onTouchMove(e) {
if ($.spotSwipe.preventDefault) { e.preventDefault(); }
if(isMoving) {
var x = e.touches[0].pageX;
var y = e.touches[0].pageY;
var dx = startPosX - x;
var dy = startPosY - y;
var dir;
didMoved = true;
elapsedTime = new Date().getTime() - startTime;
if(Math.abs(dx) >= $.spotSwipe.moveThreshold && elapsedTime <= $.spotSwipe.timeThreshold) {
dir = dx > 0 ? 'left' : 'right';
}
// else if(Math.abs(dy) >= $.spotSwipe.moveThreshold && elapsedTime <= $.spotSwipe.timeThreshold) {
// dir = dy > 0 ? 'down' : 'up';
// }
if(dir) {
e.preventDefault();
onTouchEnd.apply(this, arguments);
$(this)
.trigger($.Event('swipe', e), dir)
.trigger($.Event(`swipe${dir}`, e));
}
}
}
function onTouchStart(e) {
if (e.touches.length == 1) {
startPosX = e.touches[0].pageX;
startPosY = e.touches[0].pageY;
startEvent = e;
isMoving = true;
didMoved = false;
startTime = new Date().getTime();
this.addEventListener('touchmove', onTouchMove, false);
this.addEventListener('touchend', onTouchEnd, false);
}
}
function init() {
this.addEventListener && this.addEventListener('touchstart', onTouchStart, false);
}
function teardown() {
this.removeEventListener('touchstart', onTouchStart);
}
class SpotSwipe {
constructor($) {
this.version = '1.0.0';
this.enabled = 'ontouchstart' in document.documentElement;
this.preventDefault = false;
this.moveThreshold = 75;
this.timeThreshold = 200;
this.$ = $;
this._init();
}
_init() {
var $ = this.$;
$.event.special.swipe = { setup: init };
$.event.special.tap = { setup: init };
$.each(['left', 'up', 'down', 'right'], function () {
$.event.special[`swipe${this}`] = { setup: function(){
$(this).on('swipe', $.noop);
} };
});
}
}
/****************************************************
* As far as I can tell, both setupSpotSwipe and *
* setupTouchHandler should be idempotent, *
* because they directly replace functions & *
* values, and do not add event handlers directly. *
****************************************************/
Touch.setupSpotSwipe = function($) {
$.spotSwipe = new SpotSwipe($);
};
/****************************************************
* Method for adding pseudo drag events to elements *
***************************************************/
Touch.setupTouchHandler = function($) {
$.fn.addTouch = function(){
this.each(function(i,el){
$(el).bind('touchstart touchmove touchend touchcancel', function(event) {
//we pass the original event object because the jQuery event
//object is normalized to w3c specs and does not provide the TouchList
handleTouch(event);
});
});
var handleTouch = function(event){
var touches = event.changedTouches,
first = touches[0],
eventTypes = {
touchstart: 'mousedown',
touchmove: 'mousemove',
touchend: 'mouseup'
},
type = eventTypes[event.type],
simulatedEvent
;
if('MouseEvent' in window && typeof window.MouseEvent === 'function') {
simulatedEvent = new window.MouseEvent(type, {
'bubbles': true,
'cancelable': true,
'screenX': first.screenX,
'screenY': first.screenY,
'clientX': first.clientX,
'clientY': first.clientY
});
} else {
simulatedEvent = document.createEvent('MouseEvent');
simulatedEvent.initMouseEvent(type, true, true, window, 1, first.screenX, first.screenY, first.clientX, first.clientY, false, false, false, false, 0/*left*/, null);
}
first.target.dispatchEvent(simulatedEvent);
};
};
};
Touch.init = function ($) {
if(typeof($.spotSwipe) === 'undefined') {
Touch.setupSpotSwipe($);
Touch.setupTouchHandler($);
}
};
export {Touch};