簡単なタッチ操作のイベントを追加します
此腳本不應該直接安裝，它是一個供其他腳本使用的函式庫。欲使用本函式庫，請在腳本 metadata 寫上： // @require https://update.cn-greasyfork.org/scripts/419806/894991/touchActionEx.js
// ==UserScript==
// @name touchActionEx
// @version 0.3
// @description 簡単なタッチ操作のイベントを追加します
// @author y_kahou
// ==/UserScript==
function addTap(ele, {interval = 200} = {}) {
// すでにtapかdoubletapを設定していたら何もしない
if (ele.getAttribute('tap') != null || ele.getAttribute('doubletap') != null)
return
ele.setAttribute('tap','')
ele.addEventListener('touchstart', e => {
if (e.targetTouches.length > 1) {
ele.dataset.tap = 0
return
}
ele.dataset.tap = 1
let to = setTimeout(() => {
ele.dataset.tap = 0
ele.dispatchEvent(new CustomEvent('hold', {detail: {touch: e.targetTouches[0]}}))
}, interval)
ele.dataset.tap_to = to
})
ele.addEventListener('touchmove', e => {
if (ele.dataset.tap == 0)
return
ele.dispatchEvent(new Event('subfocus'))
ele.dataset.tap = 0
clearTimeout(ele.dataset.tap_to)
})
ele.addEventListener('touchend', e => {
if (ele.dataset.tap == 0)
return
ele.dataset.tap = 0
clearTimeout(ele.dataset.tap_to)
ele.dispatchEvent(new CustomEvent('tap', {detail: {touch: e.changedTouches[0]}}))
e.preventDefault()
})
}
function addDoubletap(ele, {interval = 200} = {}) {
// すでにtapかdoubletapを設定していたら何もしない
if (ele.getAttribute('tap') != null || ele.getAttribute('doubletap') != null)
return
ele.setAttribute('doubletap', '')
ele.addEventListener('touchstart', e => {
if (e.targetTouches.length > 1) {
ele.dataset.tap = 0
return
}
ele.dataset.tap = 1
let to = setTimeout(() => {
ele.dataset.tap = 0
ele.dispatchEvent(new CustomEvent('hold', {detail: {touch: e.targetTouches[0]}}))
}, interval)
ele.dataset.tap_to = to
})
ele.addEventListener('touchmove', e => {
if (ele.dataset.tap == 0)
return
ele.dispatchEvent(new Event('subfocus'))
ele.dataset.tap = 0
clearTimeout(ele.dataset.tap_to)
})
ele.addEventListener('touchend', e => {
if (ele.dataset.tap == 0)
return
ele.dataset.tap = 0
clearTimeout(ele.dataset.tap_to)
let event = new CustomEvent('temp', {detail: {touch: e.changedTouches[0]}})
ele.dispatchEvent(event)
e.preventDefault()
})
ele.addEventListener('temp', e => {
if (ele.dataset.dbltap == 1) {
ele.dataset.dbltap = 0
clearTimeout(ele.dataset.dbltap_to)
ele.dispatchEvent(new CustomEvent('doubletap', {detail: e.detail}))
} else {
ele.dataset.dbltap = 1
var to = setTimeout(() => {
ele.dataset.dbltap = 0
ele.dispatchEvent(new CustomEvent('tap', {detail: e.detail}))
}, interval)
ele.dataset.dbltap_to = to
}
})
}
function addSwipe(ele, {min_dist = 50} = {}) {
// すでにswipeかswipe_wayを設定していたら何もしない
if (ele.getAttribute('swipe') != null || ele.getAttribute('swipe_way') != null)
return
ele.setAttribute('swipe','')
ele.addEventListener('touchstart', e => {
if (e.touches.length > 1) {
ele.dataset.start_point = ''
return
}
var x = Math.floor(e.touches[0].screenX)
var y = Math.floor(e.touches[0].screenY)
ele.dataset.start_point = `${x},${y}`
})
ele.addEventListener('touchmove', e => {
if (e.touches.length > 1) {
ele.dataset.start_point = ''
return
}
})
ele.addEventListener('touchend', e => {
if (e.changedTouches.length > 1)
return
var p = ele.dataset.start_point
if (!p)
return
var x1 = Number(p.split(',')[0])
var y1 = Number(p.split(',')[1])
var x2 = Math.floor(e.changedTouches[0].screenX)
var y2 = Math.floor(e.changedTouches[0].screenY)
var ang = Math.atan2(y2 - y1, x2 - x1) * 180 / Math.PI
if (ang < 0) ang += 360
var dist = Math.sqrt(Math.pow(x2 - x1, 2) + Math.pow(y2 - y1, 2))
if (min_dist < dist) {
var dt = {
from: { x: x1, y: y1 },
dest: { x: x2, y: y2 },
angle: ang, distance: dist
}
ele.dispatchEvent(new CustomEvent('swipe', {detail: dt}))
}
})
}
function addSwipeWay(ele, {range = 90, min_dist = 50} = {}) {
// すでにswipe_wayを設定していたら何もしない
if (ele.getAttribute('swipe_way') != null)
return
// swipe未設定なら設定
if (ele.getAttribute('swipe') == null) {
addSwipe(ele, min_dist)
}
ele.removeAttribute('swipe')
ele.setAttribute('swipe_way', '')
ele.addEventListener('swipe', e => {
const ways = ['right', 'down', 'left', 'up']
let ang = e.detail.angle
let dist = e.detail.distance
for (var i in ways) {
var ang_ = (i==0 && 270<ang ? ang-360 : ang)
if (Math.abs(90 * i - ang_) <= range / 2) {
ele.dispatchEvent(new CustomEvent('swipe' + ways[i], { detail: e.detail}))
break
}
}
})
}