标签：function utils return shang 刷新 var options Math
<template>
<div :id="eleId" class="pull-container">
<div class="scroller">
<div class="pulldown"
:class="[pulldownChangeStyle,{'hide':!displaypullDownDiv}]"
:style="{'margin-top':'-'+pullDownDiff+'px'}">
<div class="pulldown-icon"></div>
<div class="pulldown-label">{{pullDownTip}}</div>
</div>
<slot></slot>
<div class="pullup"
:class="[pullupChangeStyle,{'hide':!displaypullUpDiv}]">
<div class="pullup-icon"></div>
<div class="pullup-label">{{pullUpTip}}</div>
</div>
</div>
</div>
</template>
<script>
import Scroll from './myScroll'
const PULL_DOWN_NORMAL = '下拉刷新'
const PULL_DOWN_RELEASE = '释放加载'
const PULL_DOWN_LOADING = '加载中，请稍后'
const PULL_UP_NORMAL = '上拉刷新'
const PULL_UP_RELEASE = '释放加载'
const PULL_UP_LOADING = '加载中，请稍后'
// 加载状态-1默认，0显示提示下拉信息，1显示释放刷新信息，2执行加载数据，只有当为-1时才能再次加载
const STATE_DEFAULT = -1
const STATE_PULL_NORMAL = 0
const STATE_PULL_RELEASE = 1
const STATE_PULL_LOADING = 2
const STYLE_RELEASE = 'release'
const STYLE_REFRESH = 'refresh'
//不写到vue data中，优化内存
var timeoutHandler = 0,
timeout = 30000,//timeout of reset refreshing state if u donnot call the finshCallback
pullDownHeight = 50,//pull down element height
pullUpHeight = 50;
export default {
props: {
disablePulldown: {
type: Boolean,
default: false,
},
disablePullup: {
type: Boolean,
default: false,
}
},
data() {
return {
displaypullDownDiv: false,
displaypullUpDiv: false,
pullUpTip: PULL_UP_NORMAL,
pullDownTip: PULL_DOWN_NORMAL,
refreshStep: STATE_DEFAULT,
eleId: 'bajianscroll',
pulldownChangeStyle: '',
pullupChangeStyle: '',
pullDownDiff: 0
}
},
mounted() {
this.$nextTick(function () {
this.eleId = 'bajian' + Math.round(Math.random() * 1000)
setTimeout(() => {
this.registerDrag()
}, 50)
})
}
,
methods: {
registerDrag() {
this.myscroll = new Scroll('#' + this.eleId)
this.myscroll.on('scroll', this._onTouchMove);
this.myscroll.on('scrollEnd', this._onTouchEnd);
},
_onTouchMove() {
if (this.refreshStep == STATE_PULL_LOADING)
return;
if (!this.disablePulldown && this.myscroll.y > 5 && this.myscroll.y < pullDownHeight / 2) {
this.pullDownDiff = pullDownHeight - this.myscroll.y;
if (this.refreshStep === STATE_PULL_NORMAL) return;
this.displaypullDownDiv = true
this.displaypullUpDiv = false
this.pulldownChangeStyle = ''
this.pullDownTip = PULL_DOWN_NORMAL
this.refreshStep = STATE_PULL_NORMAL
} else if (!this.disablePulldown && this.myscroll.y >= pullDownHeight) {
this.pulldownChangeStyle = STYLE_RELEASE
this.pullDownTip = PULL_DOWN_RELEASE
this.refreshStep = STATE_PULL_RELEASE
} else if (!this.disablePullup && this.myscroll.y < -5 && -this.myscroll.y >= pullUpHeight - this.myscroll.maxScrollY) {
this.pullupChangeStyle = STYLE_RELEASE
this.pullUpTip = PULL_UP_RELEASE
this.refreshStep = STATE_PULL_RELEASE
} else if (!this.disablePullup && this.myscroll.y < -5 && this.myscroll.y < this.myscroll.maxScrollY && this.myscroll.y > -pullUpHeight + this.myscroll.maxScrollY) {
if (this.refreshStep === STATE_PULL_NORMAL) return;
this.displaypullUpDiv = true
this.displaypullDownDiv = false
this.pullupChangeStyle = ''
this.pullUpTip = PULL_UP_NORMAL
this.refreshStep = STATE_PULL_NORMAL
}
},
reset() {
if (this.refreshStep != STATE_DEFAULT) {
this.refreshStep = STATE_DEFAULT
if (!this.disablePulldown) {
this.displaypullDownDiv = false
this.pulldownChangeStyle = ''
}
if (!this.disablePullup) {
this.displaypullUpDiv = false
this.pullupChangeStyle = ''
}
setTimeout(() => {
this.myscroll.refresh();
}, 0)
clearTimeout(timeoutHandler)
}
},
_onTouchEnd() {
this.pullDownDiff = 0
if (this.refreshStep == STATE_PULL_RELEASE) {
if (!this.disablePullup && this.pullupChangeStyle == STYLE_RELEASE) {
this.myscroll.maxScrollY < -10 && this.myscroll.scrollTo(0, this.myscroll.maxScrollY - pullUpHeight)
this.pullupChangeStyle = STYLE_REFRESH
this.pullUpTip = PULL_UP_LOADING
this.refreshStep = STATE_PULL_LOADING;
this.$emit('on-pullup', this.reset);
} else if (!this.disablePulldown && this.pulldownChangeStyle == STYLE_RELEASE) {
this.pulldownChangeStyle = STYLE_REFRESH
this.pullDownTip = PULL_DOWN_LOADING
this.refreshStep = STATE_PULL_LOADING;
this.$emit('on-pulldown', this.reset);
}
timeoutHandler = window.setTimeout(() => {
if (this.refreshStep == STATE_PULL_LOADING)
this.reset();
}, timeout);
} else if (this.refreshStep != STATE_PULL_LOADING) {
this.reset();
}
}
}
}
</script>
<style scoped>
.scroller {
min-height: 101%; /*修正内容高度不够无法scroll*/
-webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}
.pulldown, .pullup {
transition: all 0.2s linear;
}
.hide {
display: none;
}
.pull-container {
overflow: hidden;
transform: translateZ(0);
user-select: none;
text-size-adjust: none;
}
/*refresh start*/
.pulldown, .pullup {
height: 50px;
line-height: 50px;
padding: 5px 15px;
font-weight: bold;
font-size: 14px;
color: #888;
text-align: center;
}
.pulldown .pulldown-icon, .pullup .pullup-icon {
display: block;
width: 40px;
height: 40px;
background: url(./pull-icon@2x.png) 0 0 no-repeat;
-webkit-background-size: 40px 80px;
background-size: 40px 80px;
-webkit-transition-property: -webkit-transform;
-webkit-transition-duration: 250ms;
}
.pulldown .pulldown-label, .pullup .pullup-label {
position: relative;
top: -40px;
}
.pulldown .pulldown-icon {
-webkit-transform: rotate(0deg) translateZ(0);
}
.pullup .pullup-icon {
-webkit-transform: rotate(-180deg) translateZ(0);
}
.pulldown.release .pulldown-icon {
-webkit-transform: rotate(-180deg) translateZ(0);
}
.pullup.release .pullup-icon {
-webkit-transform: rotate(0deg) translateZ(0);
}
.pulldown.refresh .pulldown-icon, .pullup.refresh .pullup-icon {
background-position: 0 100%;
-webkit-transition-duration: 0ms;
-webkit-animation: spinner 3s infinite linear;
animation: spinner 3s infinite linear;
}
/*通用转动动画*/
@-webkit-keyframes spinner {
0% {
-webkit-transform: rotate(0deg);
}
50% {
-webkit-transform: rotate(180deg);
}
100% {
-webkit-transform: rotate(360deg);
}
}
/*refresh end*/
</style>
import IScroll from ‘./iscroll-probe.js’
var extend = function (oldObj, newObj) {
for (var key in newObj) {
oldObj[key] = newObj[key];
}
return oldObj;
};
var Scroll = function (selector, opts) {
var KaTeX parse error: Expected '}', got 'EOF' at end of input: …TON|SELECT|IMG)/}
};
options = extend(options, opts || {});
IScroll.utils.isBadAndroid = false;//处理页面抖动
$scroll = new IScroll(selector, options);
$scroll.refresh();
return $scroll
};
if (typeof module != ‘undefined’ && module.exports) {
module.exports = Scroll;
} else {
window.scroll = Scroll;
}
export default Scroll;
// document.addEventListener(‘touchmove’, function (e) { e.preventDefault(); }, false);
<template>
<div id="app">
<pull-to-refresh
@on-pullup='onPullup'
@on-pulldown='onPulldown' class="page">
<ul @click="testClick($event)">
<li :key="index" v-for="(item, index) in items">
# item {{ index }}
</li>
</ul>
</pull-to-refresh>
<!-- <b>examples for disable on-pullup && pulldown:</b>
<pull-to-refresh
:disable-pullup="true"
:disable-pulldown="true">
<ul>
<li :key="index" v-for="(item, index) in items">
# item {{ index }}
</li>
</ul>
</pull-to-refresh> -->
</div>
</template>
<script>
import PullToRefresh from './components/pull-to-refresh'
export default {
components: {PullToRefresh},
data() {
return {
items: [2, 3, 4, 5, 1, 2, 3, 4, 5, 2, 3, 4, 5, 1, 2, 3, 4, 5, 2, 3, 4, 5, 2, 3, 4, 5]
}
},
methods: {
onPullup(finshCallback) {
console.log('onPullup');
setTimeout(() => {
console.log('finshCallback');
this.items = this.items.concat([6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6])
finshCallback();//finish refreshing state
}, 3000);
},
onPulldown(finshCallback) {
console.log('onPulldown');
setTimeout(() => {
console.log('finshCallback');
this.items = [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9]
finshCallback();//finish refreshing state
}, 3000);
},
testClick(event) {
window.alert('click ' + event.target.innerHTML)
}
},
}
</script>
<style>
body {
font-family: Helvetica, sans-serif;
}
.page {
height: 400px;
background: #eee;
position: relative;
/* Prevent native touch events on Windows */
-ms-touch-action: none;
/* Prevent the callout on tap-hold and text selection */
-webkit-touch-callout: none;
user-select: none;
text-size-adjust: none;
}
#app {
height: 100%;
max-width: 400px;
margin: 0 auto
}
ul {
list-style: none;
padding: 0px;
margin: 0px
}
ul > li:nth-child(even) {
background-color: #fff
}
/*scrollbar start*/
.iScrollVerticalScrollbar {
position: absolute;
z-index: 9999;
width: 2px;
bottom: 2px;
top: 2px;
right: 2px;
overflow: hidden;
}
.iScrollVerticalScrollbar.iScrollBothScrollbars {
bottom: 18px;
}
.iScrollIndicator {
position: absolute;
background: #999;
border-radius: 6px;
opacity: .8;
}
.iScrollVerticalScrollbar .iScrollIndicator {
width: 100%;
background: #999;
}
/*scrollbar end*/
</style>
```/*! iScroll v5.2.0-snapshot ~ (c) 2008-2017 Matteo Spinelli ~ http://cubiq.org/license */
var IScroll = (function (window, document, Math) {
var rAF = window.requestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame ||
window.oRequestAnimationFrame ||
window.msRequestAnimationFrame ||
function (callback) {
window.setTimeout(callback, 1000 / 60);
};
var utils = (function () {
var me = {};
var _elementStyle = document.createElement('div').style;
var _vendor = (function () {
var vendors = ['t', 'webkitT', 'MozT', 'msT', 'OT'],
transform,
i = 0,
l = vendors.length;
for (; i < l; i++) {
transform = vendors[i] + 'ransform';
if (transform in _elementStyle) return vendors[i].substr(0, vendors[i].length - 1);
}
return false;
})();
function _prefixStyle(style) {
if (_vendor === false) return false;
if (_vendor === '') return style;
return _vendor + style.charAt(0).toUpperCase() + style.substr(1);
}
me.getTime = Date.now || function getTime() {
return new Date().getTime();
};
me.extend = function (target, obj) {
for (var i in obj) {
target[i] = obj[i];
}
};
me.addEvent = function (el, type, fn, capture) {
el.addEventListener(type, fn, !!capture);
};
me.removeEvent = function (el, type, fn, capture) {
el.removeEventListener(type, fn, !!capture);
};
me.prefixPointerEvent = function (pointerEvent) {
return window.MSPointerEvent ?
'MSPointer' + pointerEvent.charAt(7).toUpperCase() + pointerEvent.substr(8) :
pointerEvent;
};
me.momentum = function (current, start, time, lowerMargin, wrapperSize, deceleration) {
var distance = current - start,
speed = Math.abs(distance) / time,
destination,
duration;
deceleration = deceleration === undefined ? 0.0006 : deceleration;
destination = current + (speed * speed) / (2 * deceleration) * (distance < 0 ? -1 : 1);
duration = speed / deceleration;
if (destination < lowerMargin) {
destination = wrapperSize ? lowerMargin - (wrapperSize / 2.5 * (speed / 8)) : lowerMargin;
distance = Math.abs(destination - current);
duration = distance / speed;
} else if (destination > 0) {
destination = wrapperSize ? wrapperSize / 2.5 * (speed / 8) : 0;
distance = Math.abs(current) + destination;
duration = distance / speed;
}
return {
destination: Math.round(destination),
duration: duration
};
};
var _transform = _prefixStyle('transform');
me.extend(me, {
hasTransform: _transform !== false,
hasPerspective: _prefixStyle('perspective') in _elementStyle,
hasTouch: 'ontouchstart' in window,
hasPointer: !!(window.PointerEvent || window.MSPointerEvent), // IE10 is prefixed
hasTransition: _prefixStyle('transition') in _elementStyle
});
/*
This should find all Android browsers lower than build 535.19 (both stock browser and webview)
- galaxy S2 is ok
- 2.3.6 : `AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1`
- 4.0.4 : `AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30`
- galaxy S3 is badAndroid (stock brower, webview)
`AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30`
- galaxy S4 is badAndroid (stock brower, webview)
`AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30`
- galaxy S5 is OK
`AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Mobile Safari/537.36 (Chrome/)`
- galaxy S6 is OK
`AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Mobile Safari/537.36 (Chrome/)`
*/
me.isBadAndroid = (function () {
var appVersion = window.navigator.appVersion;
// Android browser is not a chrome browser.
if (/Android/.test(appVersion) && !(/Chrome\/\d/.test(appVersion))) {
var safariVersion = appVersion.match(/Safari\/(\d+.\d)/);
if (safariVersion && typeof safariVersion === "object" && safariVersion.length >= 2) {
return parseFloat(safariVersion[1]) < 535.19;
} else {
return true;
}
} else {
return false;
}
})();
me.extend(me.style = {}, {
transform: _transform,
transitionTimingFunction: _prefixStyle('transitionTimingFunction'),
transitionDuration: _prefixStyle('transitionDuration'),
transitionDelay: _prefixStyle('transitionDelay'),
transformOrigin: _prefixStyle('transformOrigin'),
touchAction: _prefixStyle('touchAction')
});
me.hasClass = function (e, c) {
var re = new RegExp("(^|\\s)" + c + "(\\s|$)");
return re.test(e.className);
};
me.addClass = function (e, c) {
if (me.hasClass(e, c)) {
return;
}
var newclass = e.className.split(' ');
newclass.push(c);
e.className = newclass.join(' ');
};
me.removeClass = function (e, c) {
if (!me.hasClass(e, c)) {
return;
}
var re = new RegExp("(^|\\s)" + c + "(\\s|$)", 'g');
e.className = e.className.replace(re, ' ');
};
me.offset = function (el) {
var left = -el.offsetLeft,
top = -el.offsetTop;
// jshint -W084
while (el = el.offsetParent) {
left -= el.offsetLeft;
top -= el.offsetTop;
}
// jshint +W084
return {
left: left,
top: top
};
};
me.preventDefaultException = function (el, exceptions) {
for (var i in exceptions) {
if (exceptions[i].test(el[i])) {
return true;
}
}
return false;
};
me.extend(me.eventType = {}, {
touchstart: 1,
touchmove: 1,
touchend: 1,
mousedown: 2,
mousemove: 2,
mouseup: 2,
pointerdown: 3,
pointermove: 3,
pointerup: 3,
MSPointerDown: 3,
MSPointerMove: 3,
MSPointerUp: 3
});
me.extend(me.ease = {}, {
quadratic: {
style: 'cubic-bezier(0.25, 0.46, 0.45, 0.94)',
fn: function (k) {
return k * (2 - k);
}
},
circular: {
style: 'cubic-bezier(0.1, 0.57, 0.1, 1)', // Not properly "circular" but this looks better, it should be (0.075, 0.82, 0.165, 1)
fn: function (k) {
return Math.sqrt(1 - (--k * k));
}
},
back: {
style: 'cubic-bezier(0.175, 0.885, 0.32, 1.275)',
fn: function (k) {
var b = 4;
return (k = k - 1) * k * ((b + 1) * k + b) + 1;
}
},
bounce: {
style: '',
fn: function (k) {
if ((k /= 1) < (1 / 2.75)) {
return 7.5625 * k * k;
} else if (k < (2 / 2.75)) {
return 7.5625 * (k -= (1.5 / 2.75)) * k + 0.75;
} else if (k < (2.5 / 2.75)) {
return 7.5625 * (k -= (2.25 / 2.75)) * k + 0.9375;
} else {
return 7.5625 * (k -= (2.625 / 2.75)) * k + 0.984375;
}
}
},
elastic: {
style: '',
fn: function (k) {
var f = 0.22,
e = 0.4;
if (k === 0) {
return 0;
}
if (k == 1) {
return 1;
}
return (e * Math.pow(2, -10 * k) * Math.sin((k - f / 4) * (2 * Math.PI) / f) + 1);
}
}
});
me.tap = function (e, eventName) {
var ev = document.createEvent('Event');
ev.initEvent(eventName, true, true);
ev.pageX = e.pageX;
ev.pageY = e.pageY;
e.target.dispatchEvent(ev);
};
me.click = function (e) {
var target = e.target,
ev;
if (!(/(SELECT|INPUT|TEXTAREA)/i).test(target.tagName)) {
// https://developer.mozilla.org/en-US/docs/Web/API/MouseEvent/initMouseEvent
// initMouseEvent is deprecated.
ev = document.createEvent('Event');
ev.initEvent('click', true, true);
ev.view = e.view || window;
ev.detail = 1;
ev.screenX = target.screenX || 0;
ev.screenY = target.screenY || 0;
ev.clientX = target.clientX || 0;
ev.clientY = target.clientY || 0;
ev.ctrlKey = !!e.ctrlKey;
ev.altKey = !!e.altKey;
ev.shiftKey = !!e.shiftKey;
ev.metaKey = !!e.metaKey;
ev.button = 0;
ev.relatedTarget = null;
ev._constructed = true;
target.dispatchEvent(ev);
}
};
me.getTouchAction = function (eventPassthrough, addPinch) {
var touchAction = 'none';
if (eventPassthrough === 'vertical') {
touchAction = 'pan-y';
} else if (eventPassthrough === 'horizontal') {
touchAction = 'pan-x';
}
if (addPinch && touchAction != 'none') {
// add pinch-zoom support if the browser supports it, but if not (eg. Chrome <55) do nothing
touchAction += ' pinch-zoom';
}
return touchAction;
};
me.getRect = function (el) {
if (el instanceof SVGElement) {
var rect = el.getBoundingClientRect();
return {
top: rect.top,
left: rect.left,
width: rect.width,
height: rect.height
};
} else {
return {
top: el.offsetTop,
left: el.offsetLeft,
width: el.offsetWidth,
height: el.offsetHeight
};
}
};
return me;
})();
function IScroll(el, options) {
this.wrapper = typeof el == 'string' ? document.querySelector(el) : el;
this.scroller = this.wrapper.children[0];
this.scrollerStyle = this.scroller.style; // cache style for better performance
this.options = {
resizeScrollbars: true,
mouseWheelSpeed: 20,
snapThreshold: 0.334,
// INSERT POINT: OPTIONS
disablePointer: !utils.hasPointer,
disableTouch: utils.hasPointer || !utils.hasTouch,
disableMouse: utils.hasPointer || utils.hasTouch,
startX: 0,
startY: 0,
scrollY: true,
directionLockThreshold: 5,
momentum: true,
bounce: true,
bounceTime: 600,
bounceEasing: '',
preventDefault: true,
preventDefaultException: {tagName: /^(INPUT|TEXTAREA|BUTTON|SELECT)$/},
HWCompositing: true,
useTransition: true,
useTransform: true,
bindToWrapper: typeof window.onmousedown === "undefined"
};
for (var i in options) {
this.options[i] = options[i];
}
// Normalize options
this.translateZ = this.options.HWCompositing && utils.hasPerspective ? ' translateZ(0)' : '';
this.options.useTransition = utils.hasTransition && this.options.useTransition;
this.options.useTransform = utils.hasTransform && this.options.useTransform;
this.options.eventPassthrough = this.options.eventPassthrough === true ? 'vertical' : this.options.eventPassthrough;
this.options.preventDefault = !this.options.eventPassthrough && this.options.preventDefault;
// If you want eventPassthrough I have to lock one of the axes
this.options.scrollY = this.options.eventPassthrough == 'vertical' ? false : this.options.scrollY;
this.options.scrollX = this.options.eventPassthrough == 'horizontal' ? false : this.options.scrollX;
// With eventPassthrough we also need lockDirection mechanism
this.options.freeScroll = this.options.freeScroll && !this.options.eventPassthrough;
this.options.directionLockThreshold = this.options.eventPassthrough ? 0 : this.options.directionLockThreshold;
this.options.bounceEasing = typeof this.options.bounceEasing == 'string' ? utils.ease[this.options.bounceEasing] || utils.ease.circular : this.options.bounceEasing;
this.options.resizePolling = this.options.resizePolling === undefined ? 60 : this.options.resizePolling;
if (this.options.tap === true) {
this.options.tap = 'tap';
}
// https://github.com/cubiq/iscroll/issues/1029
if (!this.options.useTransition && !this.options.useTransform) {
if (!(/relative|absolute/i).test(this.scrollerStyle.position)) {
this.scrollerStyle.position = "relative";
}
}
if (this.options.shrinkScrollbars == 'scale') {
this.options.useTransition = false;
}
this.options.invertWheelDirection = this.options.invertWheelDirection ? -1 : 1;
if (this.options.probeType == 3) {
this.options.useTransition = false;
}
// INSERT POINT: NORMALIZATION
// Some defaults
this.x = 0;
this.y = 0;
this.directionX = 0;
this.directionY = 0;
this._events = {};
// INSERT POINT: DEFAULTS
this._init();
this.refresh();
this.scrollTo(this.options.startX, this.options.startY);
this.enable();
}
IScroll.prototype = {
version: '5.2.0-snapshot',
_init: function () {
this._initEvents();
if (this.options.scrollbars || this.options.indicators) {
this._initIndicators();
}
if (this.options.mouseWheel) {
this._initWheel();
}
if (this.options.snap) {
this._initSnap();
}
if (this.options.keyBindings) {
this._initKeys();
}
// INSERT POINT: _init
},
destroy: function () {
this._initEvents(true);
clearTimeout(this.resizeTimeout);
this.resizeTimeout = null;
this._execEvent('destroy');
},
_transitionEnd: function (e) {
if (e.target != this.scroller || !this.isInTransition) {
return;
}
this._transitionTime();
if (!this.resetPosition(this.options.bounceTime)) {
this.isInTransition = false;
this._execEvent('scrollEnd');
}
},
_start: function (e) {
// React to left mouse button only
if (utils.eventType[e.type] != 1) {
// for button property
// http://unixpapa.com/js/mouse.html
var button;
if (!e.which) {
/* IE case */
button = (e.button < 2) ? 0 :
((e.button == 4) ? 1 : 2);
} else {
/* All others */
button = e.button;
}
if (button !== 0) {
return;
}
}
if (!this.enabled || (this.initiated && utils.eventType[e.type] !== this.initiated)) {
return;
}
if (this.options.preventDefault && !utils.isBadAndroid && !utils.preventDefaultException(e.target, this.options.preventDefaultException)) {
e.preventDefault();
}
var point = e.touches ? e.touches[0] : e,
pos;
this.initiated = utils.eventType[e.type];
this.moved = false;
this.distX = 0;
this.distY = 0;
this.directionX = 0;
this.directionY = 0;
this.directionLocked = 0;
this.startTime = utils.getTime();
if (this.options.useTransition && this.isInTransition) {
this._transitionTime();
this.isInTransition = false;
pos = this.getComputedPosition();
this._translate(Math.round(pos.x), Math.round(pos.y));
this._execEvent('scrollEnd');
} else if (!this.options.useTransition && this.isAnimating) {
this.isAnimating = false;
this._execEvent('scrollEnd');
}
this.startX = this.x;
this.startY = this.y;
this.absStartX = this.x;
this.absStartY = this.y;
this.pointX = point.pageX;
this.pointY = point.pageY;
this._execEvent('beforeScrollStart');
},
_move: function (e) {
if (!this.enabled || utils.eventType[e.type] !== this.initiated) {
return;
}
if (this.options.preventDefault) { // increases performance on Android? TODO: check!
e.preventDefault();
}
var point = e.touches ? e.touches[0] : e,
deltaX = point.pageX - this.pointX,
deltaY = point.pageY - this.pointY,
timestamp = utils.getTime(),
newX, newY,
absDistX, absDistY;
this.pointX = point.pageX;
this.pointY = point.pageY;
this.distX += deltaX;
this.distY += deltaY;
absDistX = Math.abs(this.distX);
absDistY = Math.abs(this.distY);
// We need to move at least 10 pixels for the scrolling to initiate
if (timestamp - this.endTime > 300 && (absDistX < 10 && absDistY < 10)) {
return;
}
// If you are scrolling in one direction lock the other
if (!this.directionLocked && !this.options.freeScroll) {
if (absDistX > absDistY + this.options.directionLockThreshold) {
this.directionLocked = 'h'; // lock horizontally
} else if (absDistY >= absDistX + this.options.directionLockThreshold) {
this.directionLocked = 'v'; // lock vertically
} else {
this.directionLocked = 'n'; // no lock
}
}
if (this.directionLocked == 'h') {
if (this.options.eventPassthrough == 'vertical') {
e.preventDefault();
} else if (this.options.eventPassthrough == 'horizontal') {
this.initiated = false;
return;
}
deltaY = 0;
} else if (this.directionLocked == 'v') {
if (this.options.eventPassthrough == 'horizontal') {
e.preventDefault();
} else if (this.options.eventPassthrough == 'vertical') {
this.initiated = false;
return;
}
deltaX = 0;
}
deltaX = this.hasHorizontalScroll ? deltaX : 0;
deltaY = this.hasVerticalScroll ? deltaY : 0;
newX = this.x + deltaX;
newY = this.y + deltaY;
// Slow down if outside of the boundaries
if (newX > 0 || newX < this.maxScrollX) {
newX = this.options.bounce ? this.x + deltaX / 3 : newX > 0 ? 0 : this.maxScrollX;
}
if (newY > 0 || newY < this.maxScrollY) {
newY = this.options.bounce ? this.y + deltaY / 3 : newY > 0 ? 0 : this.maxScrollY;
}
this.directionX = deltaX > 0 ? -1 : deltaX < 0 ? 1 : 0;
this.directionY = deltaY > 0 ? -1 : deltaY < 0 ? 1 : 0;
if (!this.moved) {
this._execEvent('scrollStart');
}
this.moved = true;
this._translate(newX, newY);
/* REPLACE START: _move */
if (timestamp - this.startTime > 300) {
this.startTime = timestamp;
this.startX = this.x;
this.startY = this.y;
if (this.options.probeType == 1) {
this._execEvent('scroll');
}
}
if (this.options.probeType > 1) {
this._execEvent('scroll');
}
/* REPLACE END: _move */
},
_end: function (e) {
if (!this.enabled || utils.eventType[e.type] !== this.initiated) {
return;
}
if (this.options.preventDefault && !utils.preventDefaultException(e.target, this.options.preventDefaultException)) {
e.preventDefault();
}
var point = e.changedTouches ? e.changedTouches[0] : e,
momentumX,
momentumY,
duration = utils.getTime() - this.startTime,
newX = Math.round(this.x),
newY = Math.round(this.y),
distanceX = Math.abs(newX - this.startX),
distanceY = Math.abs(newY - this.startY),
time = 0,
easing = '';
this.isInTransition = 0;
this.initiated = 0;
this.endTime = utils.getTime();
// reset if we are outside of the boundaries
if (this.resetPosition(this.options.bounceTime)) {
return;
}
this.scrollTo(newX, newY); // ensures that the last position is rounded
// we scrolled less than 10 pixels
if (!this.moved) {
if (this.options.tap) {
utils.tap(e, this.options.tap);
}
if (this.options.click) {
utils.click(e);
}
this._execEvent('scrollCancel');
return;
}
if (this._events.flick && duration < 200 && distanceX < 100 && distanceY < 100) {
this._execEvent('flick');
return;
}
// start momentum animation if needed
if (this.options.momentum && duration < 300) {
momentumX = this.hasHorizontalScroll ? utils.momentum(this.x, this.startX, duration, this.maxScrollX, this.options.bounce ? this.wrapperWidth : 0, this.options.deceleration) : {
destination: newX,
duration: 0
};
momentumY = this.hasVerticalScroll ? utils.momentum(this.y, this.startY, duration, this.maxScrollY, this.options.bounce ? this.wrapperHeight : 0, this.options.deceleration) : {
destination: newY,
duration: 0
};
newX = momentumX.destination;
newY = momentumY.destination;
time = Math.max(momentumX.duration, momentumY.duration);
this.isInTransition = 1;
}
if (this.options.snap) {
var snap = this._nearestSnap(newX, newY);
this.currentPage = snap;
time = this.options.snapSpeed || Math.max(
Math.max(
Math.min(Math.abs(newX - snap.x), 1000),
Math.min(Math.abs(newY - snap.y), 1000)
), 300);
newX = snap.x;
newY = snap.y;
this.directionX = 0;
this.directionY = 0;
easing = this.options.bounceEasing;
}
// INSERT POINT: _end
if (newX != this.x || newY != this.y) {
// change easing function when scroller goes out of the boundaries
if (newX > 0 || newX < this.maxScrollX || newY > 0 || newY < this.maxScrollY) {
easing = utils.ease.quadratic;
}
this.scrollTo(newX, newY, time, easing);
return;
}
this._execEvent('scrollEnd');
},
_resize: function () {
var that = this;
clearTimeout(this.resizeTimeout);
this.resizeTimeout = setTimeout(function () {
that.refresh();
}, this.options.resizePolling);
},
resetPosition: function (time) {
var x = this.x,
y = this.y;
time = time || 0;
if (!this.hasHorizontalScroll || this.x > 0) {
x = 0;
} else if (this.x < this.maxScrollX) {
x = this.maxScrollX;
}
if (!this.hasVerticalScroll || this.y > 0) {
y = 0;
} else if (this.y < this.maxScrollY) {
y = this.maxScrollY;
}
if (x == this.x && y == this.y) {
return false;
}
this.scrollTo(x, y, time, this.options.bounceEasing);
return true;
},
disable: function () {
this.enabled = false;
},
enable: function () {
this.enabled = true;
},
refresh: function () {
utils.getRect(this.wrapper); // Force reflow
this.wrapperWidth = this.wrapper.clientWidth;
this.wrapperHeight = this.wrapper.clientHeight;
var rect = utils.getRect(this.scroller);
/* REPLACE START: refresh */
this.scrollerWidth = rect.width;
this.scrollerHeight = rect.height;
this.maxScrollX = this.wrapperWidth - this.scrollerWidth;
this.maxScrollY = this.wrapperHeight - this.scrollerHeight;
/* REPLACE END: refresh */
this.hasHorizontalScroll = this.options.scrollX && this.maxScrollX < 0;
this.hasVerticalScroll = this.options.scrollY && this.maxScrollY < 0;
if (!this.hasHorizontalScroll) {
this.maxScrollX = 0;
this.scrollerWidth = this.wrapperWidth;
}
if (!this.hasVerticalScroll) {
this.maxScrollY = 0;
this.scrollerHeight = this.wrapperHeight;
}
this.endTime = 0;
this.directionX = 0;
this.directionY = 0;
if (utils.hasPointer && !this.options.disablePointer) {
// The wrapper should have `touchAction` property for using pointerEvent.
this.wrapper.style[utils.style.touchAction] = utils.getTouchAction(this.options.eventPassthrough, true);
// case. not support 'pinch-zoom'
// https://github.com/cubiq/iscroll/issues/1118#issuecomment-270057583
if (!this.wrapper.style[utils.style.touchAction]) {
this.wrapper.style[utils.style.touchAction] = utils.getTouchAction(this.options.eventPassthrough, false);
}
}
this.wrapperOffset = utils.offset(this.wrapper);
this._execEvent('refresh');
this.resetPosition();
// INSERT POINT: _refresh
},
on: function (type, fn) {
if (!this._events[type]) {
this._events[type] = [];
}
this._events[type].push(fn);
},
off: function (type, fn) {
if (!this._events[type]) {
return;
}
var index = this._events[type].indexOf(fn);
if (index > -1) {
this._events[type].splice(index, 1);
}
},
_execEvent: function (type) {
if (!this._events[type]) {
return;
}
var i = 0,
l = this._events[type].length;
if (!l) {
return;
}
for (; i < l; i++) {
this._events[type][i].apply(this, [].slice.call(arguments, 1));
}
},
scrollBy: function (x, y, time, easing) {
x = this.x + x;
y = this.y + y;
time = time || 0;
this.scrollTo(x, y, time, easing);
},
scrollTo: function (x, y, time, easing) {
easing = easing || utils.ease.circular;
this.isInTransition = this.options.useTransition && time > 0;
var transitionType = this.options.useTransition && easing.style;
if (!time || transitionType) {
if (transitionType) {
this._transitionTimingFunction(easing.style);
this._transitionTime(time);
}
this._translate(x, y);
} else {
this._animate(x, y, time, easing.fn);
}
},
scrollToElement: function (el, time, offsetX, offsetY, easing) {
el = el.nodeType ? el : this.scroller.querySelector(el);
if (!el) {
return;
}
var pos = utils.offset(el);
pos.left -= this.wrapperOffset.left;
pos.top -= this.wrapperOffset.top;
// if offsetX/Y are true we center the element to the screen
var elRect = utils.getRect(el);
var wrapperRect = utils.getRect(this.wrapper);
if (offsetX === true) {
offsetX = Math.round(elRect.width / 2 - wrapperRect.width / 2);
}
if (offsetY === true) {
offsetY = Math.round(elRect.height / 2 - wrapperRect.height / 2);
}
pos.left -= offsetX || 0;
pos.top -= offsetY || 0;
pos.left = pos.left > 0 ? 0 : pos.left < this.maxScrollX ? this.maxScrollX : pos.left;
pos.top = pos.top > 0 ? 0 : pos.top < this.maxScrollY ? this.maxScrollY : pos.top;
time = time === undefined || time === null || time === 'auto' ? Math.max(Math.abs(this.x - pos.left), Math.abs(this.y - pos.top)) : time;
this.scrollTo(pos.left, pos.top, time, easing);
},
_transitionTime: function (time) {
if (!this.options.useTransition) {
return;
}
time = time || 0;
var durationProp = utils.style.transitionDuration;
if (!durationProp) {
return;
}
this.scrollerStyle[durationProp] = time + 'ms';
if (!time && utils.isBadAndroid) {
this.scrollerStyle[durationProp] = '0.0001ms';
// remove 0.0001ms
var self = this;
rAF(function () {
if (self.scrollerStyle[durationProp] === '0.0001ms') {
self.scrollerStyle[durationProp] = '0s';
}
});
}
if (this.indicators) {
for (var i = this.indicators.length; i--;) {
this.indicators[i].transitionTime(time);
}
}
// INSERT POINT: _transitionTime
},
_transitionTimingFunction: function (easing) {
this.scrollerStyle[utils.style.transitionTimingFunction] = easing;
if (this.indicators) {
for (var i = this.indicators.length; i--;) {
this.indicators[i].transitionTimingFunction(easing);
}
}
// INSERT POINT: _transitionTimingFunction
},
_translate: function (x, y) {
if (this.options.useTransform) {
/* REPLACE START: _translate */
this.scrollerStyle[utils.style.transform] = 'translate(' + x + 'px,' + y + 'px)' + this.translateZ;
/* REPLACE END: _translate */
} else {
x = Math.round(x);
y = Math.round(y);
this.scrollerStyle.left = x + 'px';
this.scrollerStyle.top = y + 'px';
}
this.x = x;
this.y = y;
if (this.indicators) {
for (var i = this.indicators.length; i--;) {
this.indicators[i].updatePosition();
}
}
// INSERT POINT: _translate
},
_initEvents: function (remove) {
var eventType = remove ? utils.removeEvent : utils.addEvent,
target = this.options.bindToWrapper ? this.wrapper : window;
eventType(window, 'orientationchange', this);
eventType(window, 'resize', this);
if (this.options.click) {
eventType(this.wrapper, 'click', this, true);
}
if (!this.options.disableMouse) {
eventType(this.wrapper, 'mousedown', this);
eventType(target, 'mousemove', this);
eventType(target, 'mousecancel', this);
eventType(target, 'mouseup', this);
}
if (utils.hasPointer && !this.options.disablePointer) {
eventType(this.wrapper, utils.prefixPointerEvent('pointerdown'), this);
eventType(target, utils.prefixPointerEvent('pointermove'), this);
eventType(target, utils.prefixPointerEvent('pointercancel'), this);
eventType(target, utils.prefixPointerEvent('pointerup'), this);
}
if (utils.hasTouch && !this.options.disableTouch) {
eventType(this.wrapper, 'touchstart', this);
eventType(target, 'touchmove', this);
eventType(target, 'touchcancel', this);
eventType(target, 'touchend', this);
}
eventType(this.scroller, 'transitionend', this);
eventType(this.scroller, 'webkitTransitionEnd', this);
eventType(this.scroller, 'oTransitionEnd', this);
eventType(this.scroller, 'MSTransitionEnd', this);
},
getComputedPosition: function () {
var matrix = window.getComputedStyle(this.scroller, null),
x, y;
if (this.options.useTransform) {
matrix = matrix[utils.style.transform].split(')')[0].split(', ');
x = +(matrix[12] || matrix[4]);
y = +(matrix[13] || matrix[5]);
} else {
x = +matrix.left.replace(/[^-\d.]/g, '');
y = +matrix.top.replace(/[^-\d.]/g, '');
}
return {x: x, y: y};
},
_initIndicators: function () {
var interactive = this.options.interactiveScrollbars,
customStyle = typeof this.options.scrollbars != 'string',
indicators = [],
indicator;
var that = this;
this.indicators = [];
if (this.options.scrollbars) {
// Vertical scrollbar
if (this.options.scrollY) {
indicator = {
el: createDefaultScrollbar('v', interactive, this.options.scrollbars),
interactive: interactive,
defaultScrollbars: true,
customStyle: customStyle,
resize: this.options.resizeScrollbars,
shrink: this.options.shrinkScrollbars,
fade: this.options.fadeScrollbars,
listenX: false
};
this.wrapper.appendChild(indicator.el);
indicators.push(indicator);
}
// Horizontal scrollbar
if (this.options.scrollX) {
indicator = {
el: createDefaultScrollbar('h', interactive, this.options.scrollbars),
interactive: interactive,
defaultScrollbars: true,
customStyle: customStyle,
resize: this.options.resizeScrollbars,
shrink: this.options.shrinkScrollbars,
fade: this.options.fadeScrollbars,
listenY: false
};
this.wrapper.appendChild(indicator.el);
indicators.push(indicator);
}
}
if (this.options.indicators) {
// TODO: check concat compatibility
indicators = indicators.concat(this.options.indicators);
}
for (var i = indicators.length; i--;) {
this.indicators.push(new Indicator(this, indicators[i]));
}
// TODO: check if we can use array.map (wide compatibility and performance issues)
function _indicatorsMap(fn) {
if (that.indicators) {
for (var i = that.indicators.length; i--;) {
fn.call(that.indicators[i]);
}
}
}
if (this.options.fadeScrollbars) {
this.on('scrollEnd', function () {
_indicatorsMap(function () {
this.fade();
});
});
this.on('scrollCancel', function () {
_indicatorsMap(function () {
this.fade();
});
});
this.on('scrollStart', function () {
_indicatorsMap(function () {
this.fade(1);
});
});
this.on('beforeScrollStart', function () {
_indicatorsMap(function () {
this.fade(1, true);
});
});
}
this.on('refresh', function () {
_indicatorsMap(function () {
this.refresh();
});
});
this.on('destroy', function () {
_indicatorsMap(function () {
this.destroy();
});
delete this.indicators;
});
},
_initWheel: function () {
utils.addEvent(this.wrapper, 'wheel', this);
utils.addEvent(this.wrapper, 'mousewheel', this);
utils.addEvent(this.wrapper, 'DOMMouseScroll', this);
this.on('destroy', function () {
clearTimeout(this.wheelTimeout);
this.wheelTimeout = null;
utils.removeEvent(this.wrapper, 'wheel', this);
utils.removeEvent(this.wrapper, 'mousewheel', this);
utils.removeEvent(this.wrapper, 'DOMMouseScroll', this);
});
},
_wheel: function (e) {
if (!this.enabled) {
return;
}
e.preventDefault();
var wheelDeltaX, wheelDeltaY,
newX, newY,
that = this;
if (this.wheelTimeout === undefined) {
that._execEvent('scrollStart');
}
// Execute the scrollEnd event after 400ms the wheel stopped scrolling
clearTimeout(this.wheelTimeout);
this.wheelTimeout = setTimeout(function () {
if (!that.options.snap) {
that._execEvent('scrollEnd');
}
that.wheelTimeout = undefined;
}, 400);
if ('deltaX' in e) {
if (e.deltaMode === 1) {
wheelDeltaX = -e.deltaX * this.options.mouseWheelSpeed;
wheelDeltaY = -e.deltaY * this.options.mouseWheelSpeed;
} else {
wheelDeltaX = -e.deltaX;
wheelDeltaY = -e.deltaY;
}
} else if ('wheelDeltaX' in e) {
wheelDeltaX = e.wheelDeltaX / 120 * this.options.mouseWheelSpeed;
wheelDeltaY = e.wheelDeltaY / 120 * this.options.mouseWheelSpeed;
} else if ('wheelDelta' in e) {
wheelDeltaX = wheelDeltaY = e.wheelDelta / 120 * this.options.mouseWheelSpeed;
} else if ('detail' in e) {
wheelDeltaX = wheelDeltaY = -e.detail / 3 * this.options.mouseWheelSpeed;
} else {
return;
}
wheelDeltaX *= this.options.invertWheelDirection;
wheelDeltaY *= this.options.invertWheelDirection;
if (!this.hasVerticalScroll) {
wheelDeltaX = wheelDeltaY;
wheelDeltaY = 0;
}
if (this.options.snap) {
newX = this.currentPage.pageX;
newY = this.currentPage.pageY;
if (wheelDeltaX > 0) {
newX--;
} else if (wheelDeltaX < 0) {
newX++;
}
if (wheelDeltaY > 0) {
newY--;
} else if (wheelDeltaY < 0) {
newY++;
}
this.goToPage(newX, newY);
return;
}
newX = this.x + Math.round(this.hasHorizontalScroll ? wheelDeltaX : 0);
newY = this.y + Math.round(this.hasVerticalScroll ? wheelDeltaY : 0);
this.directionX = wheelDeltaX > 0 ? -1 : wheelDeltaX < 0 ? 1 : 0;
this.directionY = wheelDeltaY > 0 ? -1 : wheelDeltaY < 0 ? 1 : 0;
if (newX > 0) {
newX = 0;
} else if (newX < this.maxScrollX) {
newX = this.maxScrollX;
}
if (newY > 0) {
newY = 0;
} else if (newY < this.maxScrollY) {
newY = this.maxScrollY;
}
this.scrollTo(newX, newY, 0);
if (this.options.probeType > 1) {
this._execEvent('scroll');
}
// INSERT POINT: _wheel
},
_initSnap: function () {
this.currentPage = {};
if (typeof this.options.snap == 'string') {
this.options.snap = this.scroller.querySelectorAll(this.options.snap);
}
this.on('refresh', function () {
var i = 0, l,
m = 0, n,
cx, cy,
x = 0, y,
stepX = this.options.snapStepX || this.wrapperWidth,
stepY = this.options.snapStepY || this.wrapperHeight,
el,
rect;
this.pages = [];
if (!this.wrapperWidth || !this.wrapperHeight || !this.scrollerWidth || !this.scrollerHeight) {
return;
}
if (this.options.snap === true) {
cx = Math.round(stepX / 2);
cy = Math.round(stepY / 2);
while (x > -this.scrollerWidth) {
this.pages[i] = [];
l = 0;
y = 0;
while (y > -this.scrollerHeight) {
this.pages[i][l] = {
x: Math.max(x, this.maxScrollX),
y: Math.max(y, this.maxScrollY),
width: stepX,
height: stepY,
cx: x - cx,
cy: y - cy
};
y -= stepY;
l++;
}
x -= stepX;
i++;
}
} else {
el = this.options.snap;
l = el.length;
n = -1;
for (; i < l; i++) {
rect = utils.getRect(el[i]);
if (i === 0 || rect.left <= utils.getRect(el[i - 1]).left) {
m = 0;
n++;
}
if (!this.pages[m]) {
this.pages[m] = [];
}
x = Math.max(-rect.left, this.maxScrollX);
y = Math.max(-rect.top, this.maxScrollY);
cx = x - Math.round(rect.width / 2);
cy = y - Math.round(rect.height / 2);
this.pages[m][n] = {
x: x,
y: y,
width: rect.width,
height: rect.height,
cx: cx,
cy: cy
};
if (x > this.maxScrollX) {
m++;
}
}
}
this.goToPage(this.currentPage.pageX || 0, this.currentPage.pageY || 0, 0);
// Update snap threshold if needed
if (this.options.snapThreshold % 1 === 0) {
this.snapThresholdX = this.options.snapThreshold;
this.snapThresholdY = this.options.snapThreshold;
} else {
this.snapThresholdX = Math.round(this.pages[this.currentPage.pageX][this.currentPage.pageY].width * this.options.snapThreshold);
this.snapThresholdY = Math.round(this.pages[this.currentPage.pageX][this.currentPage.pageY].height * this.options.snapThreshold);
}
});
this.on('flick', function () {
var time = this.options.snapSpeed || Math.max(
Math.max(
Math.min(Math.abs(this.x - this.startX), 1000),
Math.min(Math.abs(this.y - this.startY), 1000)
), 300);
this.goToPage(
this.currentPage.pageX + this.directionX,
this.currentPage.pageY + this.directionY,
time
);
});
},
_nearestSnap: function (x, y) {
if (!this.pages.length) {
return {x: 0, y: 0, pageX: 0, pageY: 0};
}
var i = 0,
l = this.pages.length,
m = 0;
// Check if we exceeded the snap threshold
if (Math.abs(x - this.absStartX) < this.snapThresholdX &&
Math.abs(y - this.absStartY) < this.snapThresholdY) {
return this.currentPage;
}
if (x > 0) {
x = 0;
} else if (x < this.maxScrollX) {
x = this.maxScrollX;
}
if (y > 0) {
y = 0;
} else if (y < this.maxScrollY) {
y = this.maxScrollY;
}
for (; i < l; i++) {
if (x >= this.pages[i][0].cx) {
x = this.pages[i][0].x;
break;
}
}
l = this.pages[i].length;
for (; m < l; m++) {
if (y >= this.pages[0][m].cy) {
y = this.pages[0][m].y;
break;
}
}
if (i == this.currentPage.pageX) {
i += this.directionX;
if (i < 0) {
i = 0;
} else if (i >= this.pages.length) {
i = this.pages.length - 1;
}
x = this.pages[i][0].x;
}
if (m == this.currentPage.pageY) {
m += this.directionY;
if (m < 0) {
m = 0;
} else if (m >= this.pages[0].length) {
m = this.pages[0].length - 1;
}
y = this.pages[0][m].y;
}
return {
x: x,
y: y,
pageX: i,
pageY: m
};
},
goToPage: function (x, y, time, easing) {
easing = easing || this.options.bounceEasing;
if (x >= this.pages.length) {
x = this.pages.length - 1;
} else if (x < 0) {
x = 0;
}
if (y >= this.pages[x].length) {
y = this.pages[x].length - 1;
} else if (y < 0) {
y = 0;
}
var posX = this.pages[x][y].x,
posY = this.pages[x][y].y;
time = time === undefined ? this.options.snapSpeed || Math.max(
Math.max(
Math.min(Math.abs(posX - this.x), 1000),
Math.min(Math.abs(posY - this.y), 1000)
), 300) : time;
this.currentPage = {
x: posX,
y: posY,
pageX: x,
pageY: y
};
this.scrollTo(posX, posY, time, easing);
},
next: function (time, easing) {
var x = this.currentPage.pageX,
y = this.currentPage.pageY;
x++;
if (x >= this.pages.length && this.hasVerticalScroll) {
x = 0;
y++;
}
this.goToPage(x, y, time, easing);
},
prev: function (time, easing) {
var x = this.currentPage.pageX,
y = this.currentPage.pageY;
x--;
if (x < 0 && this.hasVerticalScroll) {
x = 0;
y--;
}
this.goToPage(x, y, time, easing);
},
_initKeys: function (e) {
// default key bindings
var keys = {
pageUp: 33,
pageDown: 34,
end: 35,
home: 36,
left: 37,
up: 38,
right: 39,
down: 40
};
var i;
// if you give me characters I give you keycode
if (typeof this.options.keyBindings == 'object') {
for (i in this.options.keyBindings) {
if (typeof this.options.keyBindings[i] == 'string') {
this.options.keyBindings[i] = this.options.keyBindings[i].toUpperCase().charCodeAt(0);
}
}
} else {
this.options.keyBindings = {};
}
for (i in keys) {
this.options.keyBindings[i] = this.options.keyBindings[i] || keys[i];
}
utils.addEvent(window, 'keydown', this);
this.on('destroy', function () {
utils.removeEvent(window, 'keydown', this);
});
},
_key: function (e) {
if (!this.enabled) {
return;
}
var snap = this.options.snap, // we are using this alot, better to cache it
newX = snap ? this.currentPage.pageX : this.x,
newY = snap ? this.currentPage.pageY : this.y,
now = utils.getTime(),
prevTime = this.keyTime || 0,
acceleration = 0.250,
pos;
if (this.options.useTransition && this.isInTransition) {
pos = this.getComputedPosition();
this._translate(Math.round(pos.x), Math.round(pos.y));
this.isInTransition = false;
}
this.keyAcceleration = now - prevTime < 200 ? Math.min(this.keyAcceleration + acceleration, 50) : 0;
switch (e.keyCode) {
case this.options.keyBindings.pageUp:
if (this.hasHorizontalScroll && !this.hasVerticalScroll) {
newX += snap ? 1 : this.wrapperWidth;
} else {
newY += snap ? 1 : this.wrapperHeight;
}
break;
case this.options.keyBindings.pageDown:
if (this.hasHorizontalScroll && !this.hasVerticalScroll) {
newX -= snap ? 1 : this.wrapperWidth;
} else {
newY -= snap ? 1 : this.wrapperHeight;
}
break;
case this.options.keyBindings.end:
newX = snap ? this.pages.length - 1 : this.maxScrollX;
newY = snap ? this.pages[0].length - 1 : this.maxScrollY;
break;
case this.options.keyBindings.home:
newX = 0;
newY = 0;
break;
case this.options.keyBindings.left:
newX += snap ? -1 : 5 + this.keyAcceleration >> 0;
break;
case this.options.keyBindings.up:
newY += snap ? 1 : 5 + this.keyAcceleration >> 0;
break;
case this.options.keyBindings.right:
newX -= snap ? -1 : 5 + this.keyAcceleration >> 0;
break;
case this.options.keyBindings.down:
newY -= snap ? 1 : 5 + this.keyAcceleration >> 0;
break;
default:
return;
}
if (snap) {
this.goToPage(newX, newY);
return;
}
if (newX > 0) {
newX = 0;
this.keyAcceleration = 0;
} else if (newX < this.maxScrollX) {
newX = this.maxScrollX;
this.keyAcceleration = 0;
}
if (newY > 0) {
newY = 0;
this.keyAcceleration = 0;
} else if (newY < this.maxScrollY) {
newY = this.maxScrollY;
this.keyAcceleration = 0;
}
this.scrollTo(newX, newY, 0);
this.keyTime = now;
},
_animate: function (destX, destY, duration, easingFn) {
var that = this,
startX = this.x,
startY = this.y,
startTime = utils.getTime(),
destTime = startTime + duration;
function step() {
var now = utils.getTime(),
newX, newY,
easing;
if (now >= destTime) {
that.isAnimating = false;
that._translate(destX, destY);
if (!that.resetPosition(that.options.bounceTime)) {
that._execEvent('scrollEnd');
}
return;
}
now = (now - startTime) / duration;
easing = easingFn(now);
newX = (destX - startX) * easing + startX;
newY = (destY - startY) * easing + startY;
that._translate(newX, newY);
if (that.isAnimating) {
rAF(step);
}
if (that.options.probeType == 3) {
that._execEvent('scroll');
}
}
this.isAnimating = true;
step();
},
handleEvent: function (e) {
switch (e.type) {
case 'touchstart':
case 'pointerdown':
case 'MSPointerDown':
case 'mousedown':
this._start(e);
break;
case 'touchmove':
case 'pointermove':
case 'MSPointerMove':
case 'mousemove':
this._move(e);
break;
case 'touchend':
case 'pointerup':
case 'MSPointerUp':
case 'mouseup':
case 'touchcancel':
case 'pointercancel':
case 'MSPointerCancel':
case 'mousecancel':
this._end(e);
break;
case 'orientationchange':
case 'resize':
this._resize();
break;
case 'transitionend':
case 'webkitTransitionEnd':
case 'oTransitionEnd':
case 'MSTransitionEnd':
this._transitionEnd(e);
break;
case 'wheel':
case 'DOMMouseScroll':
case 'mousewheel':
this._wheel(e);
break;
case 'keydown':
this._key(e);
break;
case 'click':
if (this.enabled && !e._constructed) {
e.preventDefault();
e.stopPropagation();
}
break;
}
}
};
function createDefaultScrollbar(direction, interactive, type) {
var scrollbar = document.createElement('div'),
indicator = document.createElement('div');
if (type === true) {
scrollbar.style.cssText = 'position:absolute;z-index:9999';
indicator.style.cssText = '-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box;position:absolute;background:rgba(0,0,0,0.5);border:1px solid rgba(255,255,255,0.9);border-radius:3px';
}
indicator.className = 'iScrollIndicator';
if (direction == 'h') {
if (type === true) {
scrollbar.style.cssText += ';height:7px;left:2px;right:2px;bottom:0';
indicator.style.height = '100%';
}
scrollbar.className = 'iScrollHorizontalScrollbar';
} else {
if (type === true) {
scrollbar.style.cssText += ';width:7px;bottom:2px;top:2px;right:1px';
indicator.style.width = '100%';
}
scrollbar.className = 'iScrollVerticalScrollbar';
}
scrollbar.style.cssText += ';overflow:hidden';
if (!interactive) {
scrollbar.style.pointerEvents = 'none';
}
scrollbar.appendChild(indicator);
return scrollbar;
}
function Indicator(scroller, options) {
this.wrapper = typeof options.el == 'string' ? document.querySelector(options.el) : options.el;
this.wrapperStyle = this.wrapper.style;
this.indicator = this.wrapper.children[0];
this.indicatorStyle = this.indicator.style;
this.scroller = scroller;
this.options = {
listenX: true,
listenY: true,
interactive: false,
resize: true,
defaultScrollbars: false,
shrink: false,
fade: false,
speedRatioX: 0,
speedRatioY: 0
};
for (var i in options) {
this.options[i] = options[i];
}
this.sizeRatioX = 1;
this.sizeRatioY = 1;
this.maxPosX = 0;
this.maxPosY = 0;
if (this.options.interactive) {
if (!this.options.disableTouch) {
utils.addEvent(this.indicator, 'touchstart', this);
utils.addEvent(window, 'touchend', this);
}
if (!this.options.disablePointer) {
utils.addEvent(this.indicator, utils.prefixPointerEvent('pointerdown'), this);
utils.addEvent(window, utils.prefixPointerEvent('pointerup'), this);
}
if (!this.options.disableMouse) {
utils.addEvent(this.indicator, 'mousedown', this);
utils.addEvent(window, 'mouseup', this);
}
}
if (this.options.fade) {
this.wrapperStyle[utils.style.transform] = this.scroller.translateZ;
var durationProp = utils.style.transitionDuration;
if (!durationProp) {
return;
}
this.wrapperStyle[durationProp] = utils.isBadAndroid ? '0.0001ms' : '0ms';
// remove 0.0001ms
var self = this;
if (utils.isBadAndroid) {
rAF(function () {
if (self.wrapperStyle[durationProp] === '0.0001ms') {
self.wrapperStyle[durationProp] = '0s';
}
});
}
this.wrapperStyle.opacity = '0';
}
}
Indicator.prototype = {
handleEvent: function (e) {
switch (e.type) {
case 'touchstart':
case 'pointerdown':
case 'MSPointerDown':
case 'mousedown':
this._start(e);
break;
case 'touchmove':
case 'pointermove':
case 'MSPointerMove':
case 'mousemove':
this._move(e);
break;
case 'touchend':
case 'pointerup':
case 'MSPointerUp':
case 'mouseup':
case 'touchcancel':
case 'pointercancel':
case 'MSPointerCancel':
case 'mousecancel':
this._end(e);
break;
}
},
destroy: function () {
if (this.options.fadeScrollbars) {
clearTimeout(this.fadeTimeout);
this.fadeTimeout = null;
}
if (this.options.interactive) {
utils.removeEvent(this.indicator, 'touchstart', this);
utils.removeEvent(this.indicator, utils.prefixPointerEvent('pointerdown'), this);
utils.removeEvent(this.indicator, 'mousedown', this);
utils.removeEvent(window, 'touchmove', this);
utils.removeEvent(window, utils.prefixPointerEvent('pointermove'), this);
utils.removeEvent(window, 'mousemove', this);
utils.removeEvent(window, 'touchend', this);
utils.removeEvent(window, utils.prefixPointerEvent('pointerup'), this);
utils.removeEvent(window, 'mouseup', this);
}
if (this.options.defaultScrollbars && this.wrapper.parentNode) {
this.wrapper.parentNode.removeChild(this.wrapper);
}
},
_start: function (e) {
var point = e.touches ? e.touches[0] : e;
e.preventDefault();
e.stopPropagation();
this.transitionTime();
this.initiated = true;
this.moved = false;
this.lastPointX = point.pageX;
this.lastPointY = point.pageY;
this.startTime = utils.getTime();
if (!this.options.disableTouch) {
utils.addEvent(window, 'touchmove', this);
}
if (!this.options.disablePointer) {
utils.addEvent(window, utils.prefixPointerEvent('pointermove'), this);
}
if (!this.options.disableMouse) {
utils.addEvent(window, 'mousemove', this);
}
this.scroller._execEvent('beforeScrollStart');
},
_move: function (e) {
var point = e.touches ? e.touches[0] : e,
deltaX, deltaY,
newX, newY,
timestamp = utils.getTime();
if (!this.moved) {
this.scroller._execEvent('scrollStart');
}
this.moved = true;
deltaX = point.pageX - this.lastPointX;
this.lastPointX = point.pageX;
deltaY = point.pageY - this.lastPointY;
this.lastPointY = point.pageY;
newX = this.x + deltaX;
newY = this.y + deltaY;
this._pos(newX, newY);
if (this.scroller.options.probeType == 1 && timestamp - this.startTime > 300) {
this.startTime = timestamp;
this.scroller._execEvent('scroll');
} else if (this.scroller.options.probeType > 1) {
this.scroller._execEvent('scroll');
}
// INSERT POINT: indicator._move
e.preventDefault();
e.stopPropagation();
},
_end: function (e) {
if (!this.initiated) {
return;
}
this.initiated = false;
e.preventDefault();
e.stopPropagation();
utils.removeEvent(window, 'touchmove', this);
utils.removeEvent(window, utils.prefixPointerEvent('pointermove'), this);
utils.removeEvent(window, 'mousemove', this);
if (this.scroller.options.snap) {
var snap = this.scroller._nearestSnap(this.scroller.x, this.scroller.y);
var time = this.options.snapSpeed || Math.max(
Math.max(
Math.min(Math.abs(this.scroller.x - snap.x), 1000),
Math.min(Math.abs(this.scroller.y - snap.y), 1000)
), 300);
if (this.scroller.x != snap.x || this.scroller.y != snap.y) {
this.scroller.directionX = 0;
this.scroller.directionY = 0;
this.scroller.currentPage = snap;
this.scroller.scrollTo(snap.x, snap.y, time, this.scroller.options.bounceEasing);
}
}
if (this.moved) {
this.scroller._execEvent('scrollEnd');
}
},
transitionTime: function (time) {
time = time || 0;
var durationProp = utils.style.transitionDuration;
if (!durationProp) {
return;
}
this.indicatorStyle[durationProp] = time + 'ms';
if (!time && utils.isBadAndroid) {
this.indicatorStyle[durationProp] = '0.0001ms';
// remove 0.0001ms
var self = this;
rAF(function () {
if (self.indicatorStyle[durationProp] === '0.0001ms') {
self.indicatorStyle[durationProp] = '0s';
}
});
}
},
transitionTimingFunction: function (easing) {
this.indicatorStyle[utils.style.transitionTimingFunction] = easing;
},
refresh: function () {
this.transitionTime();
if (this.options.listenX && !this.options.listenY) {
this.indicatorStyle.display = this.scroller.hasHorizontalScroll ? 'block' : 'none';
} else if (this.options.listenY && !this.options.listenX) {
this.indicatorStyle.display = this.scroller.hasVerticalScroll ? 'block' : 'none';
} else {
this.indicatorStyle.display = this.scroller.hasHorizontalScroll || this.scroller.hasVerticalScroll ? 'block' : 'none';
}
if (this.scroller.hasHorizontalScroll && this.scroller.hasVerticalScroll) {
utils.addClass(this.wrapper, 'iScrollBothScrollbars');
utils.removeClass(this.wrapper, 'iScrollLoneScrollbar');
if (this.options.defaultScrollbars && this.options.customStyle) {
if (this.options.listenX) {
this.wrapper.style.right = '8px';
} else {
this.wrapper.style.bottom = '8px';
}
}
} else {
utils.removeClass(this.wrapper, 'iScrollBothScrollbars');
utils.addClass(this.wrapper, 'iScrollLoneScrollbar');
if (this.options.defaultScrollbars && this.options.customStyle) {
if (this.options.listenX) {
this.wrapper.style.right = '2px';
} else {
this.wrapper.style.bottom = '2px';
}
}
}
utils.getRect(this.wrapper); // force refresh
if (this.options.listenX) {
this.wrapperWidth = this.wrapper.clientWidth;
if (this.options.resize) {
this.indicatorWidth = Math.max(Math.round(this.wrapperWidth * this.wrapperWidth / (this.scroller.scrollerWidth || this.wrapperWidth || 1)), 8);
this.indicatorStyle.width = this.indicatorWidth + 'px';
} else {
this.indicatorWidth = this.indicator.clientWidth;
}
this.maxPosX = this.wrapperWidth - this.indicatorWidth;
if (this.options.shrink == 'clip') {
this.minBoundaryX = -this.indicatorWidth + 8;
this.maxBoundaryX = this.wrapperWidth - 8;
} else {
this.minBoundaryX = 0;
this.maxBoundaryX = this.maxPosX;
}
this.sizeRatioX = this.options.speedRatioX || (this.scroller.maxScrollX && (this.maxPosX / this.scroller.maxScrollX));
}
if (this.options.listenY) {
this.wrapperHeight = this.wrapper.clientHeight;
if (this.options.resize) {
this.indicatorHeight = Math.max(Math.round(this.wrapperHeight * this.wrapperHeight / (this.scroller.scrollerHeight || this.wrapperHeight || 1)), 8);
this.indicatorStyle.height = this.indicatorHeight + 'px';
} else {
this.indicatorHeight = this.indicator.clientHeight;
}
this.maxPosY = this.wrapperHeight - this.indicatorHeight;
if (this.options.shrink == 'clip') {
this.minBoundaryY = -this.indicatorHeight + 8;
this.maxBoundaryY = this.wrapperHeight - 8;
} else {
this.minBoundaryY = 0;
this.maxBoundaryY = this.maxPosY;
}
this.maxPosY = this.wrapperHeight - this.indicatorHeight;
this.sizeRatioY = this.options.speedRatioY || (this.scroller.maxScrollY && (this.maxPosY / this.scroller.maxScrollY));
}
this.updatePosition();
},
updatePosition: function () {
var x = this.options.listenX && Math.round(this.sizeRatioX * this.scroller.x) || 0,
y = this.options.listenY && Math.round(this.sizeRatioY * this.scroller.y) || 0;
if (!this.options.ignoreBoundaries) {
if (x < this.minBoundaryX) {
if (this.options.shrink == 'scale') {
this.width = Math.max(this.indicatorWidth + x, 8);
this.indicatorStyle.width = this.width + 'px';
}
x = this.minBoundaryX;
} else if (x > this.maxBoundaryX) {
if (this.options.shrink == 'scale') {
this.width = Math.max(this.indicatorWidth - (x - this.maxPosX), 8);
this.indicatorStyle.width = this.width + 'px';
x = this.maxPosX + this.indicatorWidth - this.width;
} else {
x = this.maxBoundaryX;
}
} else if (this.options.shrink == 'scale' && this.width != this.indicatorWidth) {
this.width = this.indicatorWidth;
this.indicatorStyle.width = this.width + 'px';
}
if (y < this.minBoundaryY) {
if (this.options.shrink == 'scale') {
this.height = Math.max(this.indicatorHeight + y * 3, 8);
this.indicatorStyle.height = this.height + 'px';
}
y = this.minBoundaryY;
} else if (y > this.maxBoundaryY) {
if (this.options.shrink == 'scale') {
this.height = Math.max(this.indicatorHeight - (y - this.maxPosY) * 3, 8);
this.indicatorStyle.height = this.height + 'px';
y = this.maxPosY + this.indicatorHeight - this.height;
} else {
y = this.maxBoundaryY;
}
} else if (this.options.shrink == 'scale' && this.height != this.indicatorHeight) {
this.height = this.indicatorHeight;
this.indicatorStyle.height = this.height + 'px';
}
}
this.x = x;
this.y = y;
if (this.scroller.options.useTransform) {
this.indicatorStyle[utils.style.transform] = 'translate(' + x + 'px,' + y + 'px)' + this.scroller.translateZ;
} else {
this.indicatorStyle.left = x + 'px';
this.indicatorStyle.top = y + 'px';
}
},
_pos: function (x, y) {
if (x < 0) {
x = 0;
} else if (x > this.maxPosX) {
x = this.maxPosX;
}
if (y < 0) {
y = 0;
} else if (y > this.maxPosY) {
y = this.maxPosY;
}
x = this.options.listenX ? Math.round(x / this.sizeRatioX) : this.scroller.x;
y = this.options.listenY ? Math.round(y / this.sizeRatioY) : this.scroller.y;
this.scroller.scrollTo(x, y);
},
fade: function (val, hold) {
if (hold && !this.visible) {
return;
}
clearTimeout(this.fadeTimeout);
this.fadeTimeout = null;
var time = val ? 250 : 500,
delay = val ? 0 : 300;
val = val ? '1' : '0';
this.wrapperStyle[utils.style.transitionDuration] = time + 'ms';
this.fadeTimeout = setTimeout((function (val) {
this.wrapperStyle.opacity = val;
this.visible = +val;
}).bind(this, val), delay);
}
};
IScroll.utils = utils;
if (typeof module != 'undefined' && module.exports) {
module.exports = IScroll;
} else if (typeof define == 'function' && define.amd) {
define(function () {
return IScroll;
});
} else {
window.IScroll = IScroll;
}
return IScroll;
})(window, document, Math);
export default IScroll;
标签：function,utils,return,shang,刷新,var,options,Math 来源： https://blog.csdn.net/qq_45424679/article/details/111759372
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