@writ/utils
Version:
My tool kit
275 lines (236 loc) • 8.34 kB
JavaScript
;
import { noop } from '../web-js/src/utils/noop';
// tap事件的延时
const TIME_DELAY = {
TAP: 250, // 轻触
LONG_TAP: 750 // 长按
};
/**
*
* @function getStat
* @desc 统计touch、gesture事件触发过程中的必要的数据信息
* @returns {object}
*
**/
function getStat() {
const stat = Object.create(null);
stat.startX = 0; // 起始坐标X
stat.startY = 0; // 起始坐标Y
stat.movedX = 0; // 移动量X
stat.movedY = 0; // 移动量Y
stat.totalX = 0; // 总移动量X
stat.totalY = 0; // 总移动量Y
stat.stime = 0; // 耗时开始
stat.etime = 0; // 耗时结束
stat.switch = false; // 移动开关
return oStat;
}
/**
* touch系列事件
*
* @method swipe
* @method swipeLeft
* @method swipeRight
* @method swipeUp
* @method swipeDown
* @method tap
* @method doubleTap
* @method singleTap
* @method longTap
*
* 触屏滑动事件管理
* */
export function touch({ onstart, onmove, onend }) {
// 合并参数
onstart = 'function' === typeof onstart ? onstart : noop;
onmove = 'function' === typeof onmove ? onmove : noop;
onend = 'function' === typeof onend ? onend : noop;
const oStat = getStat();
function touchstart(e) {
oStat.switch = true;
let eTouch;
if (e.touches) {
eTouch = e.touches[0];
}
oStat.startX = eTouch ? eTouch.clientX : e.clientX;
oStat.startY = eTouch ? eTouch.clientY : e.clientY;
oStat.stime = +new Date();
onstart.call(this, e, oStat);
}
function touchmove(e) {
if (oStat.switch) {
let eTouch;
if (e.touches) {
eTouch = e.touches[0];
}
const clientX = eTouch ? eTouch.clientX : e.clientX;
const clientY = eTouch ? eTouch.clientY : e.clientY;
oStat.movedX = clientX - oStat.startX;
oStat.movedY = clientY - oStat.startY;
oStat.totalX += oStat.movedX;
oStat.totalY += oStat.movedY;
onmove.call(this, e, oStat);
}
}
function touchcancel(e) {
if (oStat.switch) {
oStat.switch = false;
oStat.etime = +new Date();
onend.call(this, e, oStat);
}
}
if ('ontouchstart' in window) {
document.addEventListener('touchstart', touchstart, false, false);
document.addEventListener('touchmove', touchmove, false, true);
document.addEventListener('touchend', touchcancel, false, false);
document.addEventListener('touchcancel', touchcancel, false, false);
} else {
document.addEventListener('mousedown', touchstart, false, false);
document.addEventListener('mousemove', touchmove, false, false);
document.addEventListener('mouseup', touchcancel, false, false);
}
}
//
export function swipe () {}
//
/**
*
* @param {object} param0
*/
export function touchs({ selector, onstart, onmove, onend }) {
}
; (function ($) {
var touch = {},
touchTimeout, tapTimeout, swipeTimeout, longTapTimeout,
longTapDelay = 750,
gesture
function swipeDirection(x1, x2, y1, y2) {
return Math.abs(x1 - x2) >= Math.abs(y1 - y2) ? (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 = {}
}
function isPrimaryTouch(event) {
return (event.pointerType == 'touch' ||
event.pointerType == event.MSPOINTER_TYPE_TOUCH)
&& event.isPrimary
}
function isPointerEventType(e, type) {
return (e.type == 'pointer' + type ||
e.type.toLowerCase() == 'mspointer' + type)
}
$(document).ready(function () {
var now, delta, deltaX = 0, deltaY = 0, firstTouch, _isPointerType
if ('MSGesture' in window) {
gesture = new MSGesture()
gesture.target = document.body
}
$(document)
.bind('MSGestureEnd', function (e) {
var swipeDirectionFromVelocity =
e.velocityX > 1 ? 'Right' : e.velocityX < -1 ? 'Left' : e.velocityY > 1 ? 'Down' : e.velocityY < -1 ? 'Up' : null
if (swipeDirectionFromVelocity) {
touch.el.trigger('swipe')
touch.el.trigger('swipe' + swipeDirectionFromVelocity)
}
})
.on('touchstart MSPointerDown pointerdown', function (e) {
if ((_isPointerType = isPointerEventType(e, 'down')) &&
!isPrimaryTouch(e)) return
firstTouch = _isPointerType ? e : e.touches[0]
if (e.touches && e.touches.length === 1 && touch.x2) {
// Clear out touch movement data if we have it sticking around
// This can occur if touchcancel doesn't fire due to preventDefault, etc.
touch.x2 = undefined
touch.y2 = undefined
}
now = Date.now()
delta = now - (touch.last || now)
touch.el = $('tagName' in firstTouch.target ?
firstTouch.target : firstTouch.target.parentNode)
touchTimeout && clearTimeout(touchTimeout)
touch.x1 = firstTouch.pageX
touch.y1 = firstTouch.pageY
if (delta > 0 && delta <= 250) touch.isDoubleTap = true
touch.last = now
longTapTimeout = setTimeout(longTap, longTapDelay)
// adds the current touch contact for IE gesture recognition
if (gesture && _isPointerType) gesture.addPointer(e.pointerId)
})
.on('touchmove MSPointerMove pointermove', function (e) {
if ((_isPointerType = isPointerEventType(e, 'move')) &&
!isPrimaryTouch(e)) return
firstTouch = _isPointerType ? e : e.touches[0]
cancelLongTap()
touch.x2 = firstTouch.pageX
touch.y2 = firstTouch.pageY
deltaX += Math.abs(touch.x1 - touch.x2)
deltaY += Math.abs(touch.y1 - touch.y2)
})
.on('touchend MSPointerUp pointerup', function (e) {
if ((_isPointerType = isPointerEventType(e, 'up')) &&
!isPrimaryTouch(e)) return
cancelLongTap()
// swipe
if ((touch.x2 && Math.abs(touch.x1 - touch.x2) > 30) ||
(touch.y2 && Math.abs(touch.y1 - touch.y2) > 30))
swipeTimeout = setTimeout(function () {
if (touch.el) {
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)
// don't fire tap when delta position changed by more than 30 pixels,
// for instance when moving to a point and back to origin
if (deltaX < 30 && deltaY < 30) {
// 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
// [by paper] fix -> "TypeError: 'undefined' is not an object (evaluating 'touch.el.trigger'), when double tap
if (touch.el) touch.el.trigger(event)
// trigger double tap immediately
if (touch.isDoubleTap) {
if (touch.el) touch.el.trigger('doubleTap')
touch = {}
}
// trigger single tap after 250ms of inactivity
else {
touchTimeout = setTimeout(function () {
touchTimeout = null
if (touch.el) touch.el.trigger('singleTap')
touch = {}
}, 250)
}
}, 0)
} else {
touch = {}
}
deltaX = deltaY = 0
})
.on('touchcancel MSPointerCancel pointercancel', cancelAll)
$(window).on('scroll', cancelAll)
})
})(Zepto)