<template>
  <div
    :style="style"
    :class="[{
      [classNameActive]: enabled,
      [classNameDragging]: dragging,
      [classNameResizing]: resizing,
      [classNameDraggable]: draggable,
      [classNameResizable]: resizable
    }, className]"
    @mousedown="elementDown"
    @touchstart="elementTouchDown"
  >
    <div
      v-for="handle in actualHandles"
      :key="handle"
      :class="[classNameHandle, classNameHandle + '-' + handle]"
      :style="{display: enabled ? 'block' : 'none'}"
      @mousedown.stop.prevent="handleDown(handle, $event)"
      @touchstart.stop.prevent="handleTouchDown(handle, $event)"
    >
      <slot :name="handle"></slot>
    </div>
    <slot></slot>
  </div>
</template>

<script>
import { matchesSelectorToParentElements, addEvent, removeEvent } from './utils/dom'
const events = {
  mouse: {
    start: 'mousedown',
    move: 'mousemove',
    stop: 'mouseup'
  },
  touch: {
    start: 'touchstart',
    move: 'touchmove',
    stop: 'touchend'
  }
}
const userSelectNone = {
  userSelect: 'none',
  MozUserSelect: 'none',
  WebkitUserSelect: 'none',
  MsUserSelect: 'none'
}
const userSelectAuto = {
  userSelect: 'auto',
  MozUserSelect: 'auto',
  WebkitUserSelect: 'auto',
  MsUserSelect: 'auto'
}
let eventsFor = events.mouse
export default {
  replace: true,
  name: 'vue-draggable-resizable',
  props: {
    debug: {
      type: Boolean,
      default: false
    },
    className: {
      type: String,
      default: 'vdr'
    },
    classNameDraggable: {
      type: String,
      default: 'draggable'
    },
    classNameResizable: {
      type: String,
      default: 'resizable'
    },
    classNameDragging: {
      type: String,
      default: 'dragging'
    },
    classNameResizing: {
      type: String,
      default: 'resizing'
    },
    classNameActive: {
      type: String,
      default: 'active'
    },
    classNameHandle: {
      type: String,
      default: 'handle'
    },
    disableUserSelect: {
      type: Boolean,
      default: true
    },
    enableNativeDrag: {
      type: Boolean,
      default: false
    },
    preventDeactivation: {
      type: Boolean,
      default: false
    },
    active: {
      type: Boolean,
      default: false
    },
    draggable: {
      type: Boolean,
      default: true
    },
    resizable: {
      type: Boolean,
      default: true
    },
    lockAspectRatio: {
      type: Boolean,
      default: false
    },
    w: {
      type: Number,
      default: 200,
      validator: (val) => val >= 0
    },
    h: {
      type: Number,
      default: 200,
      validator: (val) => val >= 0
    },
    minWidth: {
      type: Number,
      default: 0,
      validator: (val) => val >= 0
    },
    minHeight: {
      type: Number,
      default: 0,
      validator: (val) => val >= 0
    },
    maxWidth: {
      type: Number,
      default: null,
      validator: (val) => val >= 0
    },
    maxHeight: {
      type: Number,
      default: null,
      validator: (val) => val >= 0
    },
    x: {
      type: Number,
      default: 0,
      validator: (val) => typeof val === 'number'
    },
    y: {
      type: Number,
      default: 0,
      validator: (val) => typeof val === 'number'
    },
    z: {
      type: [String, Number],
      default: 'auto',
      validator: (val) => (typeof val === 'string' ? val === 'auto' : val >= 0)
    },
    handles: {
      type: Array,
      default: () => ['tl', 'tm', 'tr', 'mr', 'br', 'bm', 'bl', 'ml'],
      validator: (val) => {
        const s = new Set(['tl', 'tm', 'tr', 'mr', 'br', 'bm', 'bl', 'ml'])
        return new Set(val.filter(h => s.has(h))).size === val.length
      }
    },
    dragHandle: {
      type: String,
      default: null
    },
    dragCancel: {
      type: String,
      default: null
    },
    axis: {
      type: String,
      default: 'both',
      validator: (val) => ['x', 'y', 'both'].includes(val)
    },
    grid: {
      type: Array,
      default: () => [1, 1]
    },
    parent: {
      type: [Boolean, String],
      default: false
    },
    onDragStart: {
      type: Function,
      default: null
    },
    onResizeStart: {
      type: Function,
      default: null
    },
    // 父级选择器
    parentSelector: {
      type: String
    },
    /* 是否开启元素对齐 */
    snap: {
      type: Boolean, default: false
    },
    /* 当调用对齐时，用来设置组件与组件之间的对齐距离，以像素为单位。 */
    snapTolerance: {
      type: Number,
      default: 15,
      validator: function (val) {
        return typeof val === 'number'
      }
    },
  },
  data: function () {
    return {
      rawWidth: this.w,
      rawHeight: this.h,
      rawLeft: this.x,
      rawTop: this.y,
      rawRight: null,
      rawBottom: null,
      left: this.x,
      top: this.y,
      right: null,
      bottom: null,
      aspectFactor: this.w / this.h,
      parentWidth: null,
      parentHeight: null,
      minW: this.minWidth,
      minH: this.minHeight,
      maxW: this.maxWidth,
      maxH: this.maxHeight,
      handle: null,
      enabled: this.active,
      resizing: false,
      dragging: false,
      zIndex: this.z,
      isLeftAbsorption: false,
      isTopAbsorption: false,
    }
  },
  created: function () {
    // eslint-disable-next-line
    if (this.maxWidth && this.minWidth > this.maxWidth) console.warn('[Vdr warn]: Invalid prop: minWidth cannot be greater than maxWidth')
    // eslint-disable-next-line
    if (this.maxWidth && this.minHeight > this.maxHeight) console.warn('[Vdr warn]: Invalid prop: minHeight cannot be greater than maxHeight')
    this.resetBoundsAndMouseState()
  },
  mounted: function () {
    if (!this.enableNativeDrag) {
      this.$el.ondragstart = () => false
    }
    [this.parentWidth, this.parentHeight] = this.getParentSize()
    this.rawRight = this.parentWidth - this.rawWidth - this.rawLeft
    this.rawBottom = this.parentHeight - this.rawHeight - this.rawTop
    addEvent(document.documentElement, 'mousedown', this.deselect)
    addEvent(document.documentElement, 'touchend touchcancel', this.deselect)
    addEvent(window, 'resize', this.checkParentSize)

    this.setSnap()
  },
  beforeDestroy: function () {
    removeEvent(document.documentElement, 'mousedown', this.deselect)
    removeEvent(document.documentElement, 'touchstart', this.handleUp)
    removeEvent(document.documentElement, 'mousemove', this.move)
    removeEvent(document.documentElement, 'touchmove', this.move)
    removeEvent(document.documentElement, 'mouseup', this.handleUp)
    removeEvent(document.documentElement, 'touchend touchcancel', this.deselect)
    removeEvent(window, 'resize', this.checkParentSize)
  },
  methods: {
    setSnap: function () {
      if (this.snap) {
        this.$el.setAttribute('data-is-snap', 'true')
      } else {
        this.$el.setAttribute('data-is-snap', 'false')
      }
    }, // 设置对齐元素
    snapCheck: function () {
      if (this.snap) {
        let p = this.$el.parentNode.childNodes // 获取当前父节点下所有子节点
        if (p.length > 1) {
          let x1 = this.rawLeft
          let x2 = this.rawLeft + this.width
          let y1 = this.rawTop
          let y2 = this.rawTop + this.height
          for (let i = 0; i < p.length; i++) {
            if (p[i] !== this.$el && p[i].className !== undefined && p[i].getAttribute('data-is-snap') !== 'false') {
              let l = p[i].offsetLeft // 对齐目标的left
              let r = l + p[i].offsetWidth // 对齐目标右侧距离窗口的left
              let t = p[i].offsetTop// 对齐目标的top
              let b = t + p[i].offsetHeight // 对齐目标右侧距离窗口的top
              let ts = Math.abs(t - y2) <= this.snapTolerance
              let bs = Math.abs(b - y1) <= this.snapTolerance
              let ls = Math.abs(l - x2) <= this.snapTolerance
              let rs = Math.abs(r - x1) <= this.snapTolerance
              if (ts) {
                this.rawTop = t - this.height
                this.rawBottom = this.parentHeight - this.height - this.rawTop
              }
              if (bs) {
                this.rawTop = b
                this.rawBottom = this.parentHeight - this.height - this.rawTop

              }
              if (ls) {
                this.rawLeft = l - this.width
                this.rawRight = this.parentWidth - this.width - this.rawLeft
              }
              if (rs) {
                this.rawLeft = r
                this.rawRight = this.parentWidth - this.width - this.rawLeft
              }
            }
          }
        }
      }
    },
    resetBoundsAndMouseState() {
      this.mouseClickPosition = { mouseX: 0, mouseY: 0, x: 0, y: 0, w: 0, h: 0 }
      this.bounds = {
        minLeft: null,
        maxLeft: null,
        minRight: null,
        maxRight: null,
        minTop: null,
        maxTop: null,
        minBottom: null,
        maxBottom: null
      }
    },
    checkParentSize() {
      if (this.parent) {
        const [newParentWidth, newParentHeight] = this.getParentSize()
        const deltaX = this.parentWidth - newParentWidth
        const deltaY = this.parentHeight - newParentHeight
        this.rawRight -= deltaX
        this.rawBottom -= deltaY
        this.parentWidth = newParentWidth
        this.parentHeight = newParentHeight
      }
    },
    getParentSize() {
      const parent = this.parent
      if (parent === true) {
        const style = window.getComputedStyle(this.$el.parentNode, null)
        return [
          parseInt(style.getPropertyValue('width'), 10),
          parseInt(style.getPropertyValue('height'), 10)
        ]
      }
      if (typeof parent === 'string') {
        const parentNode = document.querySelector(parent)
        if (!(parentNode instanceof HTMLElement)) {
          throw new Error(`The selector ${parent} does not match any element`)
        }
        return [parentNode.offsetWidth, parentNode.offsetHeight]
      }
      return [null, null]
    },
    elementTouchDown(e) {
      eventsFor = events.touch
      this.elementDown(e)
    },
    elementDown(e) {
      const target = e.target || e.srcElement
      if (this.$el.contains(target)) {
        if (this.onDragStart && this.onDragStart(e) === false) {
          return
        }
        if (
          (this.dragHandle && !matchesSelectorToParentElements(target, this.dragHandle, this.$el)) ||
          (this.dragCancel && matchesSelectorToParentElements(target, this.dragCancel, this.$el))
        ) {
          return
        }
        if (!this.enabled) {
          this.enabled = true
          this.$emit('activated')
          this.$emit('update:active', true)
        }
        if (this.draggable) {
          this.dragging = true
        }
        this.mouseClickPosition.mouseX = e.touches ? e.touches[0].pageX : e.pageX
        this.mouseClickPosition.mouseY = e.touches ? e.touches[0].pageY : e.pageY
        this.mouseClickPosition.left = this.left
        this.mouseClickPosition.right = this.right
        this.mouseClickPosition.top = this.top
        this.mouseClickPosition.bottom = this.bottom
        if (this.parent) {
          this.bounds = this.calcDragLimits()
        }
        addEvent(document.documentElement, eventsFor.move, this.move)
        addEvent(document.documentElement, eventsFor.stop, this.handleUp)
      }
    },
    calcDragLimits() {
      return {
        minLeft: (this.parentWidth + this.left) % this.grid[0],
        maxLeft: Math.floor((this.parentWidth - this.width - this.left) / this.grid[0]) * this.grid[0] + this.left,
        minRight: (this.parentWidth + this.right) % this.grid[0],
        maxRight: Math.floor((this.parentWidth - this.width - this.right) / this.grid[0]) * this.grid[0] + this.right,
        minTop: (this.parentHeight + this.top) % this.grid[1],
        maxTop: Math.floor((this.parentHeight - this.height - this.top) / this.grid[1]) * this.grid[1] + this.top,
        minBottom: (this.parentHeight + this.bottom) % this.grid[1],
        maxBottom: Math.floor((this.parentHeight - this.height - this.bottom) / this.grid[1]) * this.grid[1] + this.bottom
      }
    },
    deselect(e) {
      const target = e.target || e.srcElement
      const regex = new RegExp(this.className + '-([trmbl]{2})', '')
      const _parent = document.querySelector(this.parentSelector)

      if (!this.$el.contains(target) && !regex.test(target.className) && _parent.contains(target)) {
        if (this.enabled && !this.preventDeactivation) {
          this.enabled = false
          this.$emit('deactivated')
          this.$emit('update:active', false)
        }
        removeEvent(document.documentElement, eventsFor.move, this.handleMove)
      }
      this.resetBoundsAndMouseState()
    },
    handleTouchDown(handle, e) {
      eventsFor = events.touch
      this.handleDown(handle, e)
    },
    handleDown(handle, e) {
      if (this.onResizeStart && this.onResizeStart(handle, e) === false) {
        return
      }
      if (e.stopPropagation) e.stopPropagation()
      // Here we avoid a dangerous recursion by faking
      // corner handles as middle handles
      if (this.lockAspectRatio && !handle.includes('m')) {
        this.handle = 'm' + handle.substring(1)
      } else {
        this.handle = handle
      }
      this.resizing = true
      this.mouseClickPosition.mouseX = e.touches ? e.touches[0].pageX : e.pageX
      this.mouseClickPosition.mouseY = e.touches ? e.touches[0].pageY : e.pageY
      this.mouseClickPosition.left = this.left
      this.mouseClickPosition.right = this.right
      this.mouseClickPosition.top = this.top
      this.mouseClickPosition.bottom = this.bottom
      this.bounds = this.calcResizeLimits()
      addEvent(document.documentElement, eventsFor.move, this.handleMove)
      addEvent(document.documentElement, eventsFor.stop, this.handleUp)
    },
    calcResizeLimits() {
      let minW = this.minW
      let minH = this.minH
      let maxW = this.maxW
      let maxH = this.maxH
      const aspectFactor = this.aspectFactor
      const [gridX, gridY] = this.grid
      const width = this.width
      const height = this.height
      const left = this.left
      const top = this.top
      const right = this.right
      const bottom = this.bottom
      if (this.lockAspectRatio) {
        if (minW / minH > aspectFactor) {
          minH = minW / aspectFactor
        } else {
          minW = aspectFactor * minH
        }
        if (maxW && maxH) {
          maxW = Math.min(maxW, aspectFactor * maxH)
          maxH = Math.min(maxH, maxW / aspectFactor)
        } else if (maxW) {
          maxH = maxW / aspectFactor
        } else if (maxH) {
          maxW = aspectFactor * maxH
        }
      }
      maxW = maxW - (maxW % gridX)
      maxH = maxH - (maxH % gridY)
      const limits = {
        minLeft: null,
        maxLeft: null,
        minTop: null,
        maxTop: null,
        minRight: null,
        maxRight: null,
        minBottom: null,
        maxBottom: null
      }
      if (this.parent) {
        limits.minLeft = (this.parentWidth + left) % gridX
        limits.maxLeft = left + Math.floor((width - minW) / gridX) * gridX
        limits.minTop = (this.parentHeight + top) % gridY
        limits.maxTop = top + Math.floor((height - minH) / gridY) * gridY
        limits.minRight = (this.parentWidth + right) % gridX
        limits.maxRight = right + Math.floor((width - minW) / gridX) * gridX
        limits.minBottom = (this.parentHeight + bottom) % gridY
        limits.maxBottom = bottom + Math.floor((height - minH) / gridY) * gridY
        if (maxW) {
          limits.minLeft = Math.max(limits.minLeft, this.parentWidth - right - maxW)
          limits.minRight = Math.max(limits.minRight, this.parentWidth - left - maxW)
        }
        if (maxH) {
          limits.minTop = Math.max(limits.minTop, this.parentHeight - bottom - maxH)
          limits.minBottom = Math.max(limits.minBottom, this.parentHeight - top - maxH)
        }
        if (this.lockAspectRatio) {
          limits.minLeft = Math.max(limits.minLeft, left - top * aspectFactor)
          limits.minTop = Math.max(limits.minTop, top - left / aspectFactor)
          limits.minRight = Math.max(limits.minRight, right - bottom * aspectFactor)
          limits.minBottom = Math.max(limits.minBottom, bottom - right / aspectFactor)
        }
      } else {
        limits.minLeft = null
        limits.maxLeft = left + Math.floor((width - minW) / gridX) * gridX
        limits.minTop = null
        limits.maxTop = top + Math.floor((height - minH) / gridY) * gridY
        limits.minRight = null
        limits.maxRight = right + Math.floor((width - minW) / gridX) * gridX
        limits.minBottom = null
        limits.maxBottom = bottom + Math.floor((height - minH) / gridY) * gridY
        if (maxW) {
          limits.minLeft = -(right + maxW)
          limits.minRight = -(left + maxW)
        }
        if (maxH) {
          limits.minTop = -(bottom + maxH)
          limits.minBottom = -(top + maxH)
        }
        if (this.lockAspectRatio && (maxW && maxH)) {
          limits.minLeft = Math.min(limits.minLeft, -(right + maxW))
          limits.minTop = Math.min(limits.minTop, -(maxH + bottom))
          limits.minRight = Math.min(limits.minRight, -left - maxW)
          limits.minBottom = Math.min(limits.minBottom, -top - maxH)
        }
      }
      return limits
    },
    move(e) {
      if (this.resizing) {
        this.handleMove(e)
      } else if (this.dragging) {
        this.elementMove(e)
      }
    },
    elementMove(e) {
      const axis = this.axis
      const grid = this.grid
      const mouseClickPosition = this.mouseClickPosition
      const tmpDeltaX = axis && axis !== 'y' ? mouseClickPosition.mouseX - (e.touches ? e.touches[0].pageX : e.pageX) : 0
      const tmpDeltaY = axis && axis !== 'x' ? mouseClickPosition.mouseY - (e.touches ? e.touches[0].pageY : e.pageY) : 0
      const [deltaX, deltaY] = this.snapToGrid(this.grid, tmpDeltaX, tmpDeltaY)
      if (!deltaX && !deltaY) return
      this.rawTop = mouseClickPosition.top - deltaY
      this.rawBottom = mouseClickPosition.bottom + deltaY
      this.rawLeft = mouseClickPosition.left - deltaX
      this.rawRight = mouseClickPosition.right + deltaX

      this.snapCheck()

      this.$emit('dragging', this.left, this.top)
    },
    handleMove(e) {
      const handle = this.handle
      const mouseClickPosition = this.mouseClickPosition
      const tmpDeltaX = mouseClickPosition.mouseX - (e.touches ? e.touches[0].pageX : e.pageX)
      const tmpDeltaY = mouseClickPosition.mouseY - (e.touches ? e.touches[0].pageY : e.pageY)
      const [deltaX, deltaY] = this.snapToGrid(this.grid, tmpDeltaX, tmpDeltaY)
      if (!deltaX && !deltaY) return
      if (handle.includes('b')) {
        this.rawBottom = mouseClickPosition.bottom + deltaY
      } else if (handle.includes('t')) {
        this.rawTop = mouseClickPosition.top - deltaY
      }
      if (handle.includes('r')) {
        this.rawRight = mouseClickPosition.right + deltaX
      } else if (handle.includes('l')) {
        this.rawLeft = mouseClickPosition.left - deltaX
      }
      this.$emit('resizing', this.left, this.top, this.width, this.height)
    },
    handleUp(e) {
      this.handle = null
      this.resetBoundsAndMouseState()
      this.rawTop = this.top
      this.rawBottom = this.bottom
      this.rawLeft = this.left
      this.rawRight = this.right
      if (this.resizing) {
        this.resizing = false
        this.$emit('resizestop', this.left, this.top, this.width, this.height)
      }
      if (this.dragging) {
        this.dragging = false
        this.$emit('dragstop', this.left, this.top)
      }
      removeEvent(document.documentElement, eventsFor.move, this.handleMove)
    },
    snapToGrid(grid, pendingX, pendingY) {
      const x = Math.round(pendingX / grid[0]) * grid[0]
      const y = Math.round(pendingY / grid[1]) * grid[1]
      return [x, y]
    }
  },
  computed: {
    style() {
      return {
        position: 'absolute',
        top: this.top + 'px',
        left: this.left + 'px',
        width: this.width + 'px',
        height: this.height + 'px',
        zIndex: this.zIndex,
        ...(this.dragging && this.disableUserSelect ? userSelectNone : userSelectAuto)
      }
    },
    actualHandles() {
      if (!this.resizable) return []
      return this.handles
    },
    width() {
      return this.parentWidth - this.left - this.right
    },
    height() {
      return this.parentHeight - this.top - this.bottom
    },
    resizingOnX() {
      return (Boolean(this.handle) && (this.handle.includes('l') || this.handle.includes('r')))
    },
    resizingOnY() {
      return (Boolean(this.handle) && (this.handle.includes('t') || this.handle.includes('b')))
    },
    isCornerHandle() {
      return (Boolean(this.handle) && ['tl', 'tr', 'br', 'bl'].includes(this.handle))
    }
  },
  watch: {
    active(val) {
      this.enabled = val
      if (val) {
        this.$emit('activated')
      } else {
        this.$emit('deactivated')
      }
    },
    z(val) {
      if (val >= 0 || val === 'auto') {
        this.zIndex = val
      }
    },
    rawLeft(newLeft) {
      const bounds = this.bounds
      const aspectFactor = this.aspectFactor
      const lockAspectRatio = this.lockAspectRatio
      const left = this.left
      const top = this.top
      if (bounds.minLeft !== null && newLeft < bounds.minLeft) {
        newLeft = bounds.minLeft
      } else if (bounds.maxLeft !== null && bounds.maxLeft < newLeft) {
        newLeft = bounds.maxLeft
      }
      if (lockAspectRatio && this.resizingOnX) {
        this.rawTop = top - (left - newLeft) / aspectFactor
      }
      this.left = newLeft
    },
    rawRight(newRight) {
      const bounds = this.bounds
      const aspectFactor = this.aspectFactor
      const lockAspectRatio = this.lockAspectRatio
      const right = this.right
      const bottom = this.bottom
      if (bounds.minRight !== null && newRight < bounds.minRight) {
        newRight = bounds.minRight
      } else if (bounds.maxRight !== null && bounds.maxRight < newRight) {
        newRight = bounds.maxRight
      }
      if (lockAspectRatio && this.resizingOnX) {
        this.rawBottom = bottom - (right - newRight) / aspectFactor
      }
      this.right = newRight
    },
    rawTop(newTop) {
      const bounds = this.bounds
      const aspectFactor = this.aspectFactor
      const lockAspectRatio = this.lockAspectRatio
      const left = this.left
      const top = this.top
      if (bounds.minTop !== null && newTop < bounds.minTop) {
        newTop = bounds.minTop
      } else if (bounds.maxTop !== null && bounds.maxTop < newTop) {
        newTop = bounds.maxTop
      }
      if (lockAspectRatio && this.resizingOnY) {
        this.rawLeft = left - (top - newTop) * aspectFactor
      }
      this.top = newTop
    },
    rawBottom(newBottom) {
      const bounds = this.bounds
      const aspectFactor = this.aspectFactor
      const lockAspectRatio = this.lockAspectRatio
      const right = this.right
      const bottom = this.bottom
      if (bounds.minBottom !== null && newBottom < bounds.minBottom) {
        newBottom = bounds.minBottom
      } else if (bounds.maxBottom !== null && bounds.maxBottom < newBottom) {
        newBottom = bounds.maxBottom
      }
      if (lockAspectRatio && this.resizingOnY) {
        this.rawRight = right - (bottom - newBottom) * aspectFactor
      }
      this.bottom = newBottom
    },
    x() {
      if (this.resizing || this.dragging) {
        return
      }
      if (this.parent) {
        this.bounds = this.calcDragLimits()
      }
      const delta = this.x - this.left
      if (delta % this.grid[0] === 0) {
        this.rawLeft = this.x
        this.rawRight = this.right - delta
      }
    },
    y() {
      if (this.resizing || this.dragging) {
        return
      }
      if (this.parent) {
        this.bounds = this.calcDragLimits()
      }
      const delta = this.y - this.top
      if (delta % this.grid[1] === 0) {
        this.rawTop = this.y
        this.rawBottom = this.bottom - delta
      }
    },
    lockAspectRatio(val) {
      if (val) {
        this.aspectFactor = this.width / this.height
      } else {
        this.aspectFactor = undefined
      }
    },
    minWidth(val) {
      if (val > 0 && val <= this.width) {
        this.minW = val
      }
    },
    minHeight(val) {
      if (val > 0 && val <= this.height) {
        this.minH = val
      }
    },
    maxWidth(val) {
      this.maxW = val
    },
    maxHeight(val) {
      this.maxH = val
    },
    w() {
      if (this.resizing || this.dragging) {
        return
      }
      if (this.parent) {
        this.bounds = this.calcResizeLimits()
      }
      const delta = this.width - this.w
      if (delta % this.grid[0] === 0) {
        this.rawRight = this.right + delta
      }
    },
    h() {
      if (this.resizing || this.dragging) {
        return
      }
      if (this.parent) {
        this.bounds = this.calcResizeLimits()
      }
      const delta = this.height - this.h
      if (delta % this.grid[1] === 0) {
        this.rawBottom = this.bottom + delta
      }
    }
  }
}
</script>
<style lang="scss">
.vdr {
  touch-action: none;
  position: absolute;
  box-sizing: border-box;
  //   border: 1px dashed black;
}
.handle {
  box-sizing: border-box;
  position: absolute;
  width: 10px;
  height: 10px;
  background: #eee;
  border: 1px solid #333;
}
.handle-tl {
  top: -10px;
  left: -10px;
  cursor: nw-resize;
}
.handle-tm {
  top: -10px;
  left: 50%;
  margin-left: -5px;
  cursor: n-resize;
}
.handle-tr {
  top: -10px;
  right: -10px;
  cursor: ne-resize;
}
.handle-ml {
  top: 50%;
  margin-top: -5px;
  left: -10px;
  cursor: w-resize;
}
.handle-mr {
  top: 50%;
  margin-top: -5px;
  right: -10px;
  cursor: e-resize;
}
.handle-bl {
  bottom: -10px;
  left: -10px;
  cursor: sw-resize;
}
.handle-bm {
  bottom: -10px;
  left: 50%;
  margin-left: -5px;
  cursor: s-resize;
}
.handle-br {
  bottom: -10px;
  right: -10px;
  cursor: se-resize;
}
@media only screen and (max-width: 768px) {
  [class*="handle-"]:before {
    content: "";
    left: -10px;
    right: -10px;
    bottom: -10px;
    top: -10px;
    position: absolute;
  }
}
</style>
