ant-design-vue/components/align/Align.vue

123 lines
2.9 KiB
Vue

<script>
import PropTypes from '../_util/vue-types'
import align from 'dom-align'
import addEventListener from '../_util/Dom/addEventListener'
import { cloneElement } from '../_util/vnode.js'
import isWindow from './isWindow'
import isEqual from 'lodash.isequal'
function noop () {
}
function buffer (fn, ms) {
let timer
function clear () {
if (timer) {
clearTimeout(timer)
timer = null
}
}
function bufferFn () {
clear()
timer = setTimeout(fn, ms)
}
bufferFn.clear = clear
return bufferFn
}
export default {
props: {
childrenProps: PropTypes.object,
align: PropTypes.object.isRequired,
target: PropTypes.func.def(noop),
monitorBufferTime: PropTypes.number.def(50),
monitorWindowResize: PropTypes.bool.def(false),
disabled: PropTypes.bool.def(false),
},
data () {
this.aligned = false
return {
}
},
mounted () {
this.prevProps = { ...this.$props }
const props = this.$props
// if parent ref not attached .... use document.getElementById
!this.aligned && this.forceAlign()
if (!props.disabled && props.monitorWindowResize) {
this.startMonitorWindowResize()
}
},
updated () {
const prevProps = this.prevProps
const props = this.$props
let reAlign = false
if (!props.disabled) {
if (prevProps.disabled || !isEqual(prevProps.align, props.align)) {
reAlign = true
} else {
const lastTarget = prevProps.target()
const currentTarget = props.target()
if (isWindow(lastTarget) && isWindow(currentTarget)) {
reAlign = false
} else if (lastTarget !== currentTarget) {
reAlign = true
}
}
}
if (reAlign) {
this.forceAlign()
}
if (props.monitorWindowResize && !props.disabled) {
this.startMonitorWindowResize()
} else {
this.stopMonitorWindowResize()
}
this.prevProps = { ...this.$props }
},
beforeDestroy () {
this.stopMonitorWindowResize()
},
methods: {
startMonitorWindowResize () {
if (!this.resizeHandler) {
this.bufferMonitor = buffer(this.forceAlign, this.$props.monitorBufferTime)
this.resizeHandler = addEventListener(window, 'resize', this.bufferMonitor)
}
},
stopMonitorWindowResize () {
if (this.resizeHandler) {
this.bufferMonitor.clear()
this.resizeHandler.remove()
this.resizeHandler = null
}
},
forceAlign () {
const props = this.$props
if (!props.disabled) {
const source = this.$el
this.aligned = true
this.$listeners.align && this.$listeners.align(source, align(source, props.target(), props.align))
}
},
},
render () {
const { childrenProps } = this.$props
const child = this.$slots.default[0]
if (childrenProps) {
return cloneElement(child, { props: childrenProps })
}
return child
},
}
</script>