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/*! UIkit 2.27.5 | http://www.getuikit.com | (c) 2014 YOOtheme | MIT License */
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// Based on Zeptos touch.js
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// https://raw.github.com/madrobby/zepto/master/src/touch.js
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// Zepto.js may be freely distributed under the MIT license.
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;(function($){
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if ($.fn.swipeLeft) {
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return;
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}
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var touch = {}, touchTimeout, tapTimeout, swipeTimeout, longTapTimeout, longTapDelay = 750, gesture;
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var hasTouchEvents = 'ontouchstart' in window,
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hasPointerEvents = window.PointerEvent,
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hasTouch = hasTouchEvents
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|| window.DocumentTouch && document instanceof DocumentTouch
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|| navigator.msPointerEnabled && navigator.msMaxTouchPoints > 0 // IE 10
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|| navigator.pointerEnabled && navigator.maxTouchPoints > 0; // IE >=11
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function swipeDirection(x1, x2, y1, y2) {
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return Math.abs(x1 - x2) >= Math.abs(y1 - y2) ? (x1 - x2 > 0 ? 'Left' : 'Right') : (y1 - y2 > 0 ? 'Up' : 'Down');
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}
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function longTap() {
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longTapTimeout = null;
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if (touch.last) {
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if ( touch.el !== undefined ) touch.el.trigger('longTap');
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touch = {};
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}
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}
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function cancelLongTap() {
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if (longTapTimeout) clearTimeout(longTapTimeout);
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longTapTimeout = null;
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}
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function cancelAll() {
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if (touchTimeout) clearTimeout(touchTimeout);
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if (tapTimeout) clearTimeout(tapTimeout);
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if (swipeTimeout) clearTimeout(swipeTimeout);
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if (longTapTimeout) clearTimeout(longTapTimeout);
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touchTimeout = tapTimeout = swipeTimeout = longTapTimeout = null;
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touch = {};
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}
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function isPrimaryTouch(event){
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return event.pointerType == event.MSPOINTER_TYPE_TOUCH && event.isPrimary;
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}
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$(function(){
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var now, delta, deltaX = 0, deltaY = 0, firstTouch;
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if ('MSGesture' in window) {
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gesture = new MSGesture();
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gesture.target = document.body;
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}
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$(document)
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.on('MSGestureEnd gestureend', function(e){
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var swipeDirectionFromVelocity = e.originalEvent.velocityX > 1 ? 'Right' : e.originalEvent.velocityX < -1 ? 'Left' : e.originalEvent.velocityY > 1 ? 'Down' : e.originalEvent.velocityY < -1 ? 'Up' : null;
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if (swipeDirectionFromVelocity && touch.el !== undefined) {
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touch.el.trigger('swipe');
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touch.el.trigger('swipe'+ swipeDirectionFromVelocity);
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}
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})
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// MSPointerDown: for IE10
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// pointerdown: for IE11
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.on('touchstart MSPointerDown pointerdown', function(e){
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if(e.type == 'MSPointerDown' && !isPrimaryTouch(e.originalEvent)) return;
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firstTouch = (e.type == 'MSPointerDown' || e.type == 'pointerdown') ? e : e.originalEvent.touches[0];
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now = Date.now();
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delta = now - (touch.last || now);
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touch.el = $('tagName' in firstTouch.target ? firstTouch.target : firstTouch.target.parentNode);
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if(touchTimeout) clearTimeout(touchTimeout);
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touch.x1 = firstTouch.pageX;
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touch.y1 = firstTouch.pageY;
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if (delta > 0 && delta <= 250) touch.isDoubleTap = true;
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touch.last = now;
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longTapTimeout = setTimeout(longTap, longTapDelay);
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// adds the current touch contact for IE gesture recognition
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if (e.originalEvent && e.originalEvent.pointerId && gesture && ( e.type == 'MSPointerDown' || e.type == 'pointerdown' || e.type == 'touchstart' ) ) {
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gesture.addPointer(e.originalEvent.pointerId);
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}
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})
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// MSPointerMove: for IE10
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// pointermove: for IE11
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.on('touchmove MSPointerMove pointermove', function(e){
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if (e.type == 'MSPointerMove' && !isPrimaryTouch(e.originalEvent)) return;
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firstTouch = (e.type == 'MSPointerMove' || e.type == 'pointermove') ? e : e.originalEvent.touches[0];
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cancelLongTap();
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touch.x2 = firstTouch.pageX;
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touch.y2 = firstTouch.pageY;
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deltaX += Math.abs(touch.x1 - touch.x2);
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deltaY += Math.abs(touch.y1 - touch.y2);
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})
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// MSPointerUp: for IE10
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// pointerup: for IE11
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.on('touchend MSPointerUp pointerup', function(e){
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if (e.type == 'MSPointerUp' && !isPrimaryTouch(e.originalEvent)) return;
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cancelLongTap();
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// swipe
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if ((touch.x2 && Math.abs(touch.x1 - touch.x2) > 30) || (touch.y2 && Math.abs(touch.y1 - touch.y2) > 30)){
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swipeTimeout = setTimeout(function() {
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if ( touch.el !== undefined ) {
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touch.el.trigger('swipe');
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touch.el.trigger('swipe' + (swipeDirection(touch.x1, touch.x2, touch.y1, touch.y2)));
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}
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touch = {};
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}, 0);
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// normal tap
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} else if ('last' in touch) {
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// don't fire tap when delta position changed by more than 30 pixels,
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// for instance when moving to a point and back to origin
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if (isNaN(deltaX) || (deltaX < 30 && deltaY < 30)) {
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// delay by one tick so we can cancel the 'tap' event if 'scroll' fires
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// ('tap' fires before 'scroll')
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tapTimeout = setTimeout(function() {
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// trigger universal 'tap' with the option to cancelTouch()
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// (cancelTouch cancels processing of single vs double taps for faster 'tap' response)
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var event = $.Event('tap');
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event.cancelTouch = cancelAll;
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if ( touch.el !== undefined ) touch.el.trigger(event);
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// trigger double tap immediately
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if (touch.isDoubleTap) {
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if ( touch.el !== undefined ) touch.el.trigger('doubleTap');
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touch = {};
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}
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// trigger single tap after 250ms of inactivity
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else {
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touchTimeout = setTimeout(function(){
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touchTimeout = null;
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if ( touch.el !== undefined ) touch.el.trigger('singleTap');
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touch = {};
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}, 250);
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}
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}, 0);
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} else {
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touch = {};
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}
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deltaX = deltaY = 0;
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}
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})
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// when the browser window loses focus,
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// for example when a modal dialog is shown,
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// cancel all ongoing events
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.on('touchcancel MSPointerCancel pointercancel', function(e){
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// Ignore pointercancel if the event supports touch events, to prevent pointercancel in swipe gesture
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if ((e.type == 'touchcancel' && hasTouchEvents && hasTouch) || (!hasTouchEvents && e.type == 'pointercancel' && hasPointerEvents)) {
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cancelAll();
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}
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});
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// scrolling the window indicates intention of the user
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// to scroll, not tap or swipe, so cancel all ongoing events
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$(window).on('scroll', cancelAll);
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});
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['swipe', 'swipeLeft', 'swipeRight', 'swipeUp', 'swipeDown', 'doubleTap', 'tap', 'singleTap', 'longTap'].forEach(function(eventName){
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$.fn[eventName] = function(callback){ return $(this).on(eventName, callback); };
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});
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})(jQuery);
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