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@davemo
Forked from twalling/jquery.touch.js
Last active November 2, 2016 10:24
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Zeptos touch events, ported to work inside jQuery, including jQuery Mobiles scroll suppression.
;(function($){
var touch = {},
touchTimeout, tapTimeout, swipeTimeout,
longTapDelay = 750, longTapTimeout
function parentIfText(node) {
return 'tagName' in node ? node : node.parentNode
}
function swipeDirection(x1, x2, y1, y2) {
var xDelta = Math.abs(x1 - x2), yDelta = Math.abs(y1 - y2)
return xDelta >= yDelta ? (x1 - x2 > 0 ? 'Left' : 'Right') : (y1 - y2 > 0 ? 'Up' : 'Down')
}
function longTap() {
longTapTimeout = null
if (touch.last) {
touch.el.trigger('longTap')
touch = {}
}
}
function cancelLongTap() {
if (longTapTimeout) clearTimeout(longTapTimeout)
longTapTimeout = null
}
function cancelAll() {
if (touchTimeout) clearTimeout(touchTimeout)
if (tapTimeout) clearTimeout(tapTimeout)
if (swipeTimeout) clearTimeout(swipeTimeout)
if (longTapTimeout) clearTimeout(longTapTimeout)
touchTimeout = tapTimeout = swipeTimeout = longTapTimeout = null
touch = {}
}
$(document).ready(function(){
var now, delta
$(document.body)
.bind('touchstart', function(e){
now = Date.now()
delta = now - (touch.last || now)
touch.el = $(parentIfText(e.originalEvent.touches[0].target))
touchTimeout && clearTimeout(touchTimeout)
touch.x1 = e.originalEvent.touches[0].pageX
touch.y1 = e.originalEvent.touches[0].pageY
if (delta > 0 && delta <= 250) touch.isDoubleTap = true
touch.last = now
longTapTimeout = setTimeout(longTap, longTapDelay)
})
.bind('touchmove', function(e){
cancelLongTap()
touch.x2 = e.originalEvent.touches[0].pageX
touch.y2 = e.originalEvent.touches[0].pageY
if(Math.abs(touch.x1 - touch.x2) > 10) {
e.preventDefault();
}
})
.bind('touchend', function(e){
cancelLongTap()
// swipe
if ((touch.x2 && Math.abs(touch.x1 - touch.x2) > 30) ||
(touch.y2 && Math.abs(touch.y1 - touch.y2) > 30))
swipeTimeout = setTimeout(function() {
touch.el.trigger('swipe')
touch.el.trigger('swipe' + (swipeDirection(touch.x1, touch.x2, touch.y1, touch.y2)))
touch = {}
}, 0)
// normal tap
else if ('last' in touch)
// delay by one tick so we can cancel the 'tap' event if 'scroll' fires
// ('tap' fires before 'scroll')
tapTimeout = setTimeout(function() {
// trigger universal 'tap' with the option to cancelTouch()
// (cancelTouch cancels processing of single vs double taps for faster 'tap' response)
var event = $.Event('tap')
event.cancelTouch = cancelAll
touch.el.trigger(event)
// trigger double tap immediately
if (touch.isDoubleTap) {
touch.el.trigger('doubleTap')
touch = {}
}
// trigger single tap after 250ms of inactivity
else {
touchTimeout = setTimeout(function(){
touchTimeout = null
touch.el.trigger('singleTap')
touch = {}
}, 250)
}
}, 0)
})
.bind('touchcancel', cancelAll)
$(window).bind('scroll', cancelAll)
})
;['swipe', 'swipeLeft', 'swipeRight', 'swipeUp', 'swipeDown', 'doubleTap', 'tap', 'singleTap', 'longTap'].forEach(function(m){
$.fn[m] = function(callback){ return this.bind(m, callback) }
})
})(jQuery)
@davemo
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davemo commented May 1, 2013

This adds jQuery mobile scroll suppression into the mix for 'touchend', which is surprisingly useful and should really be the default in mobile web apps.

https://github.com/davemo/zepto/commit/6c04c93e15cc0bb744d0c517dbb05befb18eeb7b#L0L41

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