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Styles\nimport './VTreeview.sass'\n\n// Types\nimport { VNode, VNodeChildrenArrayContents } from 'vue'\nimport { PropValidator } from 'vue/types/options'\n\n// Components\nimport VTreeviewNode, { VTreeviewNodeProps } from './VTreeviewNode'\n\n// Mixins\nimport Themeable from '../../mixins/themeable'\nimport { provide as RegistrableProvide } from '../../mixins/registrable'\n\n// Utils\nimport {\n  arrayDiff,\n  deepEqual,\n  getObjectValueByPath,\n} from '../../util/helpers'\nimport mixins from '../../util/mixins'\nimport { consoleWarn } from '../../util/console'\nimport {\n  filterTreeItems,\n  FilterTreeItemFunction,\n  filterTreeItem,\n} from './util/filterTreeItems'\n\ntype VTreeviewNodeInstance = InstanceType<typeof VTreeviewNode>\n\ntype NodeCache = Set<string | number>\ntype NodeArray = (string | number)[]\n\ntype NodeState = {\n  parent: number | string | null\n  children: (number | string)[]\n  vnode: VTreeviewNodeInstance | null\n  isActive: boolean\n  isSelected: boolean\n  isIndeterminate: boolean\n  isOpen: boolean\n  item: any\n}\n\nexport default mixins(\n  RegistrableProvide('treeview'),\n  Themeable\n  /* @vue/component */\n).extend({\n  name: 'v-treeview',\n\n  provide (): object {\n    return { treeview: this }\n  },\n\n  props: {\n    active: {\n      type: Array,\n      default: () => ([]),\n    } as PropValidator<NodeArray>,\n    dense: Boolean,\n    filter: Function as PropValidator<FilterTreeItemFunction>,\n    hoverable: Boolean,\n    items: {\n      type: Array,\n      default: () => ([]),\n    } as PropValidator<any[]>,\n    multipleActive: Boolean,\n    open: {\n      type: Array,\n      default: () => ([]),\n    } as PropValidator<NodeArray>,\n    openAll: Boolean,\n    returnObject: {\n      type: Boolean,\n      default: false, // TODO: Should be true in next major\n    },\n    search: String,\n    selectionType: {\n      type: String,\n      default: 'leaf',\n      validator: (v: string) => ['leaf', 'independent'].includes(v),\n    } as PropValidator<'leaf' | 'independent'>,\n    value: {\n      type: Array,\n      default: () => ([]),\n    } as PropValidator<NodeArray>,\n    ...VTreeviewNodeProps,\n  },\n\n  data: () => ({\n    activeCache: new Set() as NodeCache,\n    nodes: {} as Record<string | number, NodeState>,\n    openCache: new Set() as NodeCache,\n    selectedCache: new Set() as NodeCache,\n  }),\n\n  computed: {\n    excludedItems (): Set<string | number> {\n      const excluded = new Set<string|number>()\n\n      if (!this.search) return excluded\n\n      for (let i = 0; i < this.items.length; i++) {\n        filterTreeItems(\n          this.filter || filterTreeItem,\n          this.items[i],\n          this.search,\n          this.itemKey,\n          this.itemText,\n          this.itemChildren,\n          excluded\n        )\n      }\n\n      return excluded\n    },\n  },\n\n  watch: {\n    items: {\n      handler () {\n        const oldKeys = Object.keys(this.nodes).map(k => getObjectValueByPath(this.nodes[k].item, this.itemKey))\n        const newKeys = this.getKeys(this.items)\n        const diff = arrayDiff(newKeys, oldKeys)\n\n        // We only want to do stuff if items have changed\n        if (!diff.length && newKeys.length < oldKeys.length) return\n\n        // If nodes are removed we need to clear them from this.nodes\n        diff.forEach(k => delete this.nodes[k])\n\n        const oldSelectedCache = [...this.selectedCache]\n        this.selectedCache = new Set()\n        this.activeCache = new Set()\n        this.openCache = new Set()\n        this.buildTree(this.items)\n\n        // Only emit selected if selection has changed\n        // as a result of items changing. This fixes a\n        // potential double emit when selecting a node\n        // with dynamic children\n        if (!deepEqual(oldSelectedCache, [...this.selectedCache])) this.emitSelected()\n      },\n      deep: true,\n    },\n    active (value: (string | number | any)[]) {\n      this.handleNodeCacheWatcher(value, this.activeCache, this.updateActive, this.emitActive)\n    },\n    value (value: (string | number | any)[]) {\n      this.handleNodeCacheWatcher(value, this.selectedCache, this.updateSelected, this.emitSelected)\n    },\n    open (value: (string | number | any)[]) {\n      this.handleNodeCacheWatcher(value, this.openCache, this.updateOpen, this.emitOpen)\n    },\n  },\n\n  created () {\n    this.buildTree(this.items)\n    this.value.forEach(key => this.updateSelected(key, true))\n    this.active.forEach(key => this.updateActive(key, true))\n  },\n\n  mounted () {\n    // Save the developer from themselves\n    if (this.$slots.prepend || this.$slots.append) {\n      consoleWarn('The prepend and append slots require a slot-scope attribute', this)\n    }\n\n    if (this.openAll) {\n      this.updateAll(true)\n    } else {\n      this.open.forEach(key => this.updateOpen(key, true))\n      this.emitOpen()\n    }\n  },\n\n  methods: {\n    /** @public */\n    updateAll (value: boolean) {\n      Object.keys(this.nodes).forEach(key => this.updateOpen(getObjectValueByPath(this.nodes[key].item, this.itemKey), value))\n      this.emitOpen()\n    },\n    getKeys (items: any[], keys: any[] = []) {\n      for (let i = 0; i < items.length; i++) {\n        const key = getObjectValueByPath(items[i], this.itemKey)\n        keys.push(key)\n        const children = getObjectValueByPath(items[i], this.itemChildren)\n        if (children) {\n          keys.push(...this.getKeys(children))\n        }\n      }\n\n      return keys\n    },\n    buildTree (items: any[], parent: (string | number | null) = null) {\n      for (let i = 0; i < items.length; i++) {\n        const item = items[i]\n        const key = getObjectValueByPath(item, this.itemKey)\n        const children = getObjectValueByPath(item, this.itemChildren, [])\n        const oldNode = this.nodes.hasOwnProperty(key) ? this.nodes[key] : {\n          isSelected: false, isIndeterminate: false, isActive: false, isOpen: false, vnode: null,\n        } as NodeState\n\n        const node: any = {\n          vnode: oldNode.vnode,\n          parent,\n          children: children.map((c: any) => getObjectValueByPath(c, this.itemKey)),\n          item,\n        }\n\n        this.buildTree(children, key)\n\n        // This fixed bug with dynamic children resetting selected parent state\n        if (!this.nodes.hasOwnProperty(key) && parent !== null && this.nodes.hasOwnProperty(parent)) {\n          node.isSelected = this.nodes[parent].isSelected\n          node.isIndeterminate = this.nodes[parent].isIndeterminate\n        } else {\n          node.isSelected = oldNode.isSelected\n          node.isIndeterminate = oldNode.isIndeterminate\n        }\n\n        node.isActive = oldNode.isActive\n        node.isOpen = oldNode.isOpen\n\n        this.nodes[key] = !children.length ? node : this.calculateState(node, this.nodes)\n\n        // Don't forget to rebuild cache\n        if (this.nodes[key].isSelected) this.selectedCache.add(key)\n        if (this.nodes[key].isActive) this.activeCache.add(key)\n        if (this.nodes[key].isOpen) this.openCache.add(key)\n\n        this.updateVnodeState(key)\n      }\n    },\n    calculateState (node: NodeState, state: Record<string | number, NodeState>) {\n      const counts = node.children.reduce((counts: number[], child: string | number) => {\n        counts[0] += +Boolean(state[child].isSelected)\n        counts[1] += +Boolean(state[child].isIndeterminate)\n        return counts\n      }, [0, 0])\n\n      node.isSelected = !!node.children.length && counts[0] === node.children.length\n      node.isIndeterminate = !node.isSelected && (counts[0] > 0 || counts[1] > 0)\n\n      return node\n    },\n    emitOpen () {\n      this.emitNodeCache('update:open', this.openCache)\n    },\n    emitSelected () {\n      this.emitNodeCache('input', this.selectedCache)\n    },\n    emitActive () {\n      this.emitNodeCache('update:active', this.activeCache)\n    },\n    emitNodeCache (event: string, cache: NodeCache) {\n      this.$emit(event, this.returnObject ? [...cache].map(key => this.nodes[key].item) : [...cache])\n    },\n    handleNodeCacheWatcher (value: any[], cache: NodeCache, updateFn: Function, emitFn: Function) {\n      value = this.returnObject ? value.map(v => getObjectValueByPath(v, this.itemKey)) : value\n      const old = [...cache]\n      if (deepEqual(old, value)) return\n\n      old.forEach(key => updateFn(key, false))\n      value.forEach(key => updateFn(key, true))\n\n      emitFn()\n    },\n    getDescendants (key: string | number, descendants: NodeArray = []) {\n      const children = this.nodes[key].children\n\n      descendants.push(...children)\n\n      for (let i = 0; i < children.length; i++) {\n        descendants = this.getDescendants(children[i], descendants)\n      }\n\n      return descendants\n    },\n    getParents (key: string | number) {\n      let parent = this.nodes[key].parent\n\n      const parents = []\n      while (parent !== null) {\n        parents.push(parent)\n        parent = this.nodes[parent].parent\n      }\n\n      return parents\n    },\n    register (node: VTreeviewNodeInstance) {\n      const key = getObjectValueByPath(node.item, this.itemKey)\n      this.nodes[key].vnode = node\n\n      this.updateVnodeState(key)\n    },\n    unregister (node: VTreeviewNodeInstance) {\n      const key = getObjectValueByPath(node.item, this.itemKey)\n      if (this.nodes[key]) this.nodes[key].vnode = null\n    },\n    isParent (key: string | number) {\n      return this.nodes[key].children && this.nodes[key].children.length\n    },\n    updateActive (key: string | number, isActive: boolean) {\n      if (!this.nodes.hasOwnProperty(key)) return\n\n      if (!this.multipleActive) {\n        this.activeCache.forEach(active => {\n          this.nodes[active].isActive = false\n          this.updateVnodeState(active)\n          this.activeCache.delete(active)\n        })\n      }\n\n      const node = this.nodes[key]\n      if (!node) return\n\n      if (isActive) this.activeCache.add(key)\n      else this.activeCache.delete(key)\n\n      node.isActive = isActive\n\n      this.updateVnodeState(key)\n    },\n    updateSelected (key: string | number, isSelected: boolean) {\n      if (!this.nodes.hasOwnProperty(key)) return\n\n      const changed = new Map()\n\n      if (this.selectionType !== 'independent') {\n        const descendants = [key, ...this.getDescendants(key)]\n        descendants.forEach(descendant => {\n          this.nodes[descendant].isSelected = isSelected\n          this.nodes[descendant].isIndeterminate = false\n          changed.set(descendant, isSelected)\n        })\n\n        const parents = this.getParents(key)\n        parents.forEach(parent => {\n          this.nodes[parent] = this.calculateState(this.nodes[parent], this.nodes)\n          changed.set(parent, this.nodes[parent].isSelected)\n        })\n      } else {\n        this.nodes[key].isSelected = isSelected\n        this.nodes[key].isIndeterminate = false\n        changed.set(key, isSelected)\n      }\n\n      for (const [key, value] of changed.entries()) {\n        this.updateVnodeState(key)\n\n        if (this.selectionType === 'leaf' && this.isParent(key)) continue\n\n        value === true ? this.selectedCache.add(key) : this.selectedCache.delete(key)\n      }\n    },\n    updateOpen (key: string | number, isOpen: boolean) {\n      if (!this.nodes.hasOwnProperty(key)) return\n\n      const node = this.nodes[key]\n      const children = getObjectValueByPath(node.item, this.itemChildren)\n\n      if (children && !children.length && node.vnode && !node.vnode.hasLoaded) {\n        node.vnode.checkChildren().then(() => this.updateOpen(key, isOpen))\n      } else if (children && children.length) {\n        node.isOpen = isOpen\n\n        node.isOpen ? this.openCache.add(key) : this.openCache.delete(key)\n\n        this.updateVnodeState(key)\n      }\n    },\n    updateVnodeState (key: string | number) {\n      const node = this.nodes[key]\n\n      if (node && node.vnode) {\n        node.vnode.isSelected = node.isSelected\n        node.vnode.isIndeterminate = node.isIndeterminate\n        node.vnode.isActive = node.isActive\n        node.vnode.isOpen = node.isOpen\n      }\n    },\n    isExcluded (key: string | number) {\n      return !!this.search && this.excludedItems.has(key)\n    },\n  },\n\n  render (h): VNode {\n    const children: VNodeChildrenArrayContents = this.items.length\n      ? this.items.map(VTreeviewNode.options.methods.genChild.bind(this))\n      /* istanbul ignore next */\n      : this.$slots.default! // TODO: remove type annotation with TS 3.2\n\n    return h('div', {\n      staticClass: 'v-treeview',\n      class: {\n        'v-treeview--hoverable': this.hoverable,\n        'v-treeview--dense': this.dense,\n        ...this.themeClasses,\n      },\n    }, children)\n  },\n})\n"],"sourceRoot":"","file":"VTreeview.js"}