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