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@fawn-nine
346
uni_modules/z-paging/components/z-paging/wxs/z-paging-wxs.wxs
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346
uni_modules/z-paging/components/z-paging/wxs/z-paging-wxs.wxs
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// z-paging
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// github地址:https://github.com/SmileZXLee/uni-z-paging
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// dcloud地址:https://ext.dcloud.net.cn/plugin?id=3935
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// 反馈QQ群：790460711
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// 微信小程序、QQ小程序、app-vue、h5上使用wxs实现自定义下拉刷新，降低逻辑层与视图层的通信折损，提升性能
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var currentMoveDistance = 0;
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function propObserver(newValue, oldValue, ownerInstance, instance) {
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var state = ownerInstance.getState();
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state.currentInstance = instance;
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var dataset = instance.getDataset();
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var loading = dataset.loading == true;
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if (newValue.indexOf('end') != -1) {
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_setTransform('translateY(0px)', instance)
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state.moveDistance = 0;
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state.oldMoveDistance = 0;
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currentMoveDistance = 0;
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} else if (newValue.indexOf('begin') != -1) {
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var refresherThreshold = instance.getDataset().refresherthreshold
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_setTransformValue(refresherThreshold, instance, state);
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}
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}
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function touchstart(e, ownerInstance) {
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var instance = ownerInstance.getState().currentInstance;
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var state = instance.getState();
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var dataset = instance.getDataset();
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var isTouchEnded = state.isTouchEnded;
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if (_getRefresherTouchDisabled(e, instance, 0)) {
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return;
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}
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state.oldMoveDistance = 0;
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var touch = _getCommonTouch(e);
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var loading = _getIsTrue(dataset.loading);
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state.startY = touch.touchY;
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state.lastRefresherTouchmove = touch;
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if (!loading && isTouchEnded) {
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state.isTouchmoving = false;
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}
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state.isTouchEnded = false;
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ownerInstance.callMethod('_handleRefresherTouchstart', touch);
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}
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function touchmove(e, ownerInstance) {
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var touch = _getCommonTouch(e);
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var instance = ownerInstance.getState().currentInstance;
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var dataset = instance.getDataset();
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var refresherThreshold = dataset.refresherthreshold;
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var state = instance.getState();
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if (_getRefresherTouchDisabled(e, instance, 1)) {
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_handleTouchMovePullingDown(state, ownerInstance, false);
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return true;
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}
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if (!_getAngleIsInRange(e, touch, state, dataset)) {
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_handleTouchMovePullingDown(state, ownerInstance, false);
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return true;
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}
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var moveDistanceObj = _getMoveDistance(e, instance);
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var moveDistance = moveDistanceObj.currentMoveDistance;
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var prevent = moveDistanceObj.isDown;
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if (moveDistance < 0) {
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_setTransformValue(0, instance, state);
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_handleTouchMovePullingDown(state, ownerInstance, false);
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return true;
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}
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if (prevent && !state.disabledBounce) {
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ownerInstance.callMethod('_handleScrollViewDisableBounce', {
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bounce: false
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});
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state.disabledBounce = true;
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_handleTouchMovePullingDown(state, ownerInstance, prevent);
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return !prevent;
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}
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_setTransformValue(moveDistance, instance, state);
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var oldRefresherStatus = state.refresherStatus;
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var dataset = instance.getDataset();
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var oldIsTouchmoving = _getIsTrue(dataset.oldistouchmoving);
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var isTouchmoving = state.isTouchmoving;
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if (moveDistance >= refresherThreshold) {
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state.refresherStatus = 1;
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} else {
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state.refresherStatus = 0;
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}
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if (!isTouchmoving) {
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state.isTouchmoving = true;
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isTouchmoving = true;
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}
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if (state.isTouchEnded) {
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state.isTouchEnded = false;
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}
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if (oldRefresherStatus == undefined || oldRefresherStatus != state.refresherStatus || oldIsTouchmoving !=
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isTouchmoving) {
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ownerInstance.callMethod('_handleRefresherTouchmove', moveDistance, touch);
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}
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_handleTouchMovePullingDown(state, ownerInstance, prevent);
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return !prevent;
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}
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function touchend(e, ownerInstance) {
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var touch = _getCommonTouch(e);
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var instance = ownerInstance.getState().currentInstance;
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var dataset = instance.getDataset();
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var state = instance.getState();
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if (_getRefresherTouchDisabled(e, instance, 2)) {
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return;
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}
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state.refresherReachMaxAngle = true;
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state.hitReachMaxAngleCount = 0;
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state.disabledBounce = false;
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state.fixedIsTopHitCount = 0;
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//ownerInstance.callMethod('_handleScrollViewDisableBounce', {bounce:true});
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var isTouchmoving = state.isTouchmoving;
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if (!isTouchmoving) {
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return;
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}
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var oldRefresherStatus = state.refresherStatus;
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var oldMoveDistance = state.moveDistance;
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var refresherThreshold = instance.getDataset().refresherthreshold
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var moveDistance = _getMoveDistance(e, instance).currentMoveDistance;
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if (!(moveDistance >= refresherThreshold && oldRefresherStatus === 1)) {
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state.isTouchmoving = false;
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}
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ownerInstance.callMethod('_handleRefresherTouchend', moveDistance);
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state.isTouchEnded = true;
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if (oldMoveDistance < refresherThreshold) {
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return;
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}
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var animate = false;
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if (moveDistance >= refresherThreshold) {
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moveDistance = refresherThreshold;
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var isIos13 = _getIsTrue(dataset.isios13);
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if (isIos13) {
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animate = true;
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}
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}
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_setTransformValue(moveDistance, instance, state, animate);
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}
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// #ifdef H5
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function isPC() {
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var userAgentInfo = navigator.userAgent;
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var Agents = ["Android", "iPhone", "SymbianOS", "Windows Phone", "iPad", "iPod"];
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var flag = true;
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for (var v = 0; v < Agents.length - 1; v++) {
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if (userAgentInfo.indexOf(Agents[v]) > 0) {
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flag = false;
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break;
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}
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}
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return flag;
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}
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var movable = false;
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function mousedown(e, ins) {
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if (!isPC()) return;
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touchstart(e, ins);
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movable = true;
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}
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function mousemove(e, ins) {
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if (!isPC()) return;
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if (!movable) return;
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touchmove(e, ins);
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}
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function mouseup(e, ins) {
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if (!isPC()) return;
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touchend(e, ins);
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movable = false;
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}
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function mouseleave(e, ins) {
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if (!isPC()) return;
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movable = false;
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}
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// #endif
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function _setTransformValue(value, instance, state, animate = false) {
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value = value || 0;
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if (state.moveDistance == value) {
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return;
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}
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state.moveDistance = value;
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_setTransform('translateY(' + value + 'px)', instance, animate);
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}
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function _setTransform(transform, instance, animate = false) {
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if (transform == 'translateY(0px)') {
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transform = 'none';
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}
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instance.requestAnimationFrame(function() {
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if (animate) {
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instance.setStyle({
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'transform': transform,
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'transition': 'transform .1s linear',
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})
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} else {
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instance.setStyle({
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'transform': transform
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})
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}
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})
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}
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function _getMoveDistance(e, instance) {
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var state = instance.getState();
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var refresherThreshold = instance.getDataset().refresherthreshold;
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var refresherOutRate = instance.getDataset().refresheroutrate;
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refresherThreshold = parseFloat(refresherThreshold);
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refresherOutRate = parseFloat(refresherOutRate);
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var touch = _getCommonTouch(e);
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var moveDistance = touch.touchY - state.startY;
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var oldMoveDistance = state.oldMoveDistance || 0;
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state.oldMoveDistance = moveDistance;
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var diffDis = moveDistance - oldMoveDistance;
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if (diffDis > 0) {
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diffDis = diffDis * 0.85;
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if (currentMoveDistance > refresherThreshold) {
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diffDis = diffDis * (1 - refresherOutRate);
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}
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}
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currentMoveDistance += diffDis;
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if (currentMoveDistance < 0) {
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currentMoveDistance = 0;
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}
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return {
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currentMoveDistance: currentMoveDistance,
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isDown: diffDis > 0
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};
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}
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function _getCommonTouch(e) {
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var touch = null;
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if (e.touches && e.touches.length) {
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touch = e.touches[0];
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} else if (e.changedTouches && e.changedTouches.length) {
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touch = e.changedTouches[0];
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} else if (e.datail && e.datail !== {}) {
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touch = e.datail;
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} else {
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touch = e;
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}
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return {
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touchX: touch.clientX,
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touchY: touch.clientY
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};
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}
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function _getRefresherTouchDisabled(e, instance, processTag) {
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var dataset = instance.getDataset();
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var state = instance.getState();
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var loading = _getIsTrue(dataset.loading);
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var useChatRecordMode = _getIsTrue(dataset.usechatrecordmode);
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var refresherEnabled = _getIsTrue(dataset.refresherenabled);
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var useCustomRefresher = _getIsTrue(dataset.usecustomrefresher);
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var usePageScroll = _getIsTrue(dataset.usepagescroll);
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var pageScrollTop = parseFloat(dataset.pagescrolltop);
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var scrollTop = parseFloat(dataset.scrolltop);
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var finalScrollTop = usePageScroll ? pageScrollTop : scrollTop;
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var fixedIsTop = false;
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var isIos = _getIsTrue(dataset.isios);
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if (!isIos && finalScrollTop == (state.startScrollTop || 0) && finalScrollTop <= 105) {
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fixedIsTop = true;
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}
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var fixedIsTopHitCount = state.fixedIsTopHitCount || 0;
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if (fixedIsTop) {
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fixedIsTopHitCount++;
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if (fixedIsTopHitCount <= 3) {
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fixedIsTop = false;
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}
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state.fixedIsTopHitCount = fixedIsTopHitCount;
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} else {
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state.fixedIsTopHitCount = 0;
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}
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if (!isIos && processTag === 0) {
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state.startScrollTop = finalScrollTop || 0;
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}
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if (!isIos && processTag === 2) {
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fixedIsTop = true;
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}
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var res = loading || useChatRecordMode || !refresherEnabled || !useCustomRefresher || ((
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usePageScroll && useCustomRefresher && pageScrollTop > 5) && !fixedIsTop) || ((
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!usePageScroll && useCustomRefresher && scrollTop > 5) && !fixedIsTop);
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return res;
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}
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function _getAngleIsInRange(e, touch, state, dataset) {
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var refresherMaxAngle = dataset.refreshermaxangle;
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var refresherAecc = _getIsTrue(dataset.refresheraecc);
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var lastRefresherTouchmove = state.lastRefresherTouchmove;
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var refresherReachMaxAngle = state.refresherReachMaxAngle;
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var moveDistance = state.oldMoveDistance;
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if (!lastRefresherTouchmove) {
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return true;
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}
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if (refresherMaxAngle >= 0 && refresherMaxAngle <= 90 && lastRefresherTouchmove) {
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if ((!moveDistance || moveDistance < 1) && !refresherAecc && refresherReachMaxAngle != null && !
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refresherReachMaxAngle) {
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return false;
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}
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var x = Math.abs(touch.touchX - lastRefresherTouchmove.touchX);
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var y = Math.abs(touch.touchY - lastRefresherTouchmove.touchY);
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var z = Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2));
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if ((x || y) && x > 1) {
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var angle = Math.asin(y / z) / Math.PI * 180;
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if (angle < refresherMaxAngle) {
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var hitReachMaxAngleCount = state.hitReachMaxAngleCount || 0;
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state.hitReachMaxAngleCount = ++hitReachMaxAngleCount;
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if (state.hitReachMaxAngleCount > 2) {
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state.lastRefresherTouchmove = touch;
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state.refresherReachMaxAngle = false;
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}
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return false;
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}
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}
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}
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state.lastRefresherTouchmove = touch;
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return true;
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}
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function _handleTouchMovePullingDown(state, instance, onPullingDown) {
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var oldOnPullingDown = state.onPullingDown || false;
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if (oldOnPullingDown != onPullingDown) {
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instance.callMethod('_handleWxsOnPullingDown', onPullingDown);
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}
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state.onPullingDown = onPullingDown;
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}
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function _getIsTrue(value) {
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value = (typeof(value) === 'string' ? JSON.parse(value) : value) || false;
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return value == true || value == 'true';
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}
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module.exports = {
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touchstart: touchstart,
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touchmove: touchmove,
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touchend: touchend,
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mousedown: mousedown,
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mousemove: mousemove,
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mouseup: mouseup,
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mouseleave: mouseleave,
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propObserver: propObserver
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}
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Reference in New Issue
Block a user