const MIN_DISTANCE = 10;
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export default {
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showWatch(newVal, oldVal, ownerInstance, instance, self) {
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var state = self.state
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var $el = ownerInstance.$el || ownerInstance.$vm && ownerInstance.$vm.$el
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if (!$el) return
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this.getDom(instance, ownerInstance, self)
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if (newVal && newVal !== 'none') {
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this.openState(newVal, instance, ownerInstance, self)
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return
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}
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if (state.left) {
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this.openState('none', instance, ownerInstance, self)
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}
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this.resetTouchStatus(instance, self)
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},
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/**
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* 开始触摸操作
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* @param {Object} e
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* @param {Object} ins
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*/
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touchstart(e, ownerInstance, self) {
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let instance = e.instance;
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let disabled = instance.getDataset().disabled
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let state = self.state;
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this.getDom(instance, ownerInstance, self)
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// fix by mehaotian, TODO 兼容 app-vue 获取dataset为字符串 , h5 获取 为 undefined 的问题,待框架修复
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disabled = this.getDisabledType(disabled)
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if (disabled) return
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// 开始触摸时移除动画类
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instance.requestAnimationFrame(function() {
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instance.removeClass('ani');
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ownerInstance.callMethod('closeSwipe');
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})
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// 记录上次的位置
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state.x = state.left || 0
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// 计算滑动开始位置
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this.stopTouchStart(e, ownerInstance, self)
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},
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/**
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* 开始滑动操作
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* @param {Object} e
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* @param {Object} ownerInstance
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*/
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touchmove(e, ownerInstance, self) {
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let instance = e.instance;
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// 删除之后已经那不到实例了
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if (!instance) return;
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let disabled = instance.getDataset().disabled
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let state = self.state
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// fix by mehaotian, TODO 兼容 app-vue 获取dataset为字符串 , h5 获取 为 undefined 的问题,待框架修复
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disabled = this.getDisabledType(disabled)
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if (disabled) return
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// 是否可以滑动页面
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this.stopTouchMove(e, self);
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if (state.direction !== 'horizontal') {
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return;
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}
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if (e.preventDefault) {
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// 阻止页面滚动
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e.preventDefault()
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}
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let x = state.x + state.deltaX
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this.move(x, instance, ownerInstance, self)
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},
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/**
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* 结束触摸操作
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* @param {Object} e
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* @param {Object} ownerInstance
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*/
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touchend(e, ownerInstance, self) {
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let instance = e.instance;
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let disabled = instance.getDataset().disabled
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let state = self.state
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// fix by mehaotian, TODO 兼容 app-vue 获取dataset为字符串 , h5 获取 为 undefined 的问题,待框架修复
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disabled = this.getDisabledType(disabled)
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if (disabled) return
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// 滑动过程中触摸结束,通过阙值判断是开启还是关闭
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// fixed by mehaotian 定时器解决点击按钮，touchend 触发比 click 事件时机早的问题 ，主要是 ios13
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this.moveDirection(state.left, instance, ownerInstance, self)
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},
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/**
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* 设置移动距离
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* @param {Object} value
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* @param {Object} instance
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* @param {Object} ownerInstance
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*/
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move(value, instance, ownerInstance, self) {
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value = value || 0
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let state = self.state
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let leftWidth = state.leftWidth
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let rightWidth = state.rightWidth
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// 获取可滑动范围
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state.left = this.range(value, -rightWidth, leftWidth);
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instance.requestAnimationFrame(function() {
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instance.setStyle({
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transform: 'translateX(' + state.left + 'px)',
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'-webkit-transform': 'translateX(' + state.left + 'px)'
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})
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})
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},
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/**
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* 获取元素信息
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* @param {Object} instance
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* @param {Object} ownerInstance
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*/
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getDom(instance, ownerInstance, self) {
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var state = self.state
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var $el = ownerInstance.$el || ownerInstance.$vm && ownerInstance.$vm.$el
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var leftDom = $el.querySelector('.button-group--left')
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var rightDom = $el.querySelector('.button-group--right')
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state.leftWidth = leftDom.offsetWidth || 0
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state.rightWidth = rightDom.offsetWidth || 0
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state.threshold = instance.getDataset().threshold
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},
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getDisabledType(value) {
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return (typeof(value) === 'string' ? JSON.parse(value) : value) || false;
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},
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/**
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* 获取范围
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* @param {Object} num
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* @param {Object} min
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* @param {Object} max
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*/
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range(num, min, max) {
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return Math.min(Math.max(num, min), max);
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},
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/**
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* 移动方向判断
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* @param {Object} left
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* @param {Object} value
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* @param {Object} ownerInstance
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* @param {Object} ins
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*/
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moveDirection(left, ins, ownerInstance, self) {
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var state = self.state
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var threshold = state.threshold
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var position = state.position
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var isopen = state.isopen || 'none'
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var leftWidth = state.leftWidth
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var rightWidth = state.rightWidth
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if (state.deltaX === 0) {
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this.openState('none', ins, ownerInstance, self)
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return
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}
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if ((isopen === 'none' && rightWidth > 0 && -left > threshold) || (isopen !== 'none' && rightWidth > 0 &&
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rightWidth +
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left < threshold)) {
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// right
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this.openState('right', ins, ownerInstance, self)
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} else if ((isopen === 'none' && leftWidth > 0 && left > threshold) || (isopen !== 'none' && leftWidth > 0 &&
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leftWidth - left < threshold)) {
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// left
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this.openState('left', ins, ownerInstance, self)
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} else {
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// default
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this.openState('none', ins, ownerInstance, self)
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}
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},
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/**
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* 开启状态
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* @param {Boolean} type
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* @param {Object} ins
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* @param {Object} ownerInstance
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*/
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openState(type, ins, ownerInstance, self) {
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let state = self.state
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let leftWidth = state.leftWidth
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let rightWidth = state.rightWidth
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let left = ''
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state.isopen = state.isopen ? state.isopen : 'none'
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switch (type) {
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case "left":
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left = leftWidth
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break
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case "right":
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left = -rightWidth
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break
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default:
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left = 0
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}
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// && !state.throttle
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if (state.isopen !== type) {
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state.throttle = true
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ownerInstance.callMethod('change', {
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open: type
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})
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}
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state.isopen = type
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// 添加动画类
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ins.requestAnimationFrame(() => {
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ins.addClass('ani');
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this.move(left, ins, ownerInstance, self)
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})
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},
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getDirection(x, y) {
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if (x > y && x > MIN_DISTANCE) {
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return 'horizontal';
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}
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if (y > x && y > MIN_DISTANCE) {
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return 'vertical';
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}
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return '';
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},
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/**
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* 重置滑动状态
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* @param {Object} event
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*/
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resetTouchStatus(instance, self) {
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let state = self.state;
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state.direction = '';
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state.deltaX = 0;
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state.deltaY = 0;
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state.offsetX = 0;
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state.offsetY = 0;
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},
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/**
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* 设置滑动开始位置
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* @param {Object} event
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*/
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stopTouchStart(event, ownerInstance, self) {
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let instance = event.instance;
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let state = self.state
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this.resetTouchStatus(instance, self);
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var touch = event.touches[0];
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state.startX = touch.clientX;
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state.startY = touch.clientY;
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},
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/**
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* 滑动中，是否禁止打开
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* @param {Object} event
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*/
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stopTouchMove(event, self) {
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let instance = event.instance;
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let state = self.state;
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let touch = event.touches[0];
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state.deltaX = touch.clientX - state.startX;
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state.deltaY = touch.clientY - state.startY;
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state.offsetY = Math.abs(state.deltaY);
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state.offsetX = Math.abs(state.deltaX);
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state.direction = state.direction || this.getDirection(state.offsetX, state.offsetY);
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}
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}
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