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Components\nimport { VExpandTransition } from '../transitions'\nimport { VIcon } from '../VIcon'\nimport VTreeview from './VTreeview'\n\n// Mixins\nimport { inject as RegistrableInject } from '../../mixins/registrable'\nimport Colorable from '../../mixins/colorable'\n\n// Utils\nimport mixins, { ExtractVue } from '../../util/mixins'\nimport { getObjectValueByPath, createRange } from '../../util/helpers'\n\n// Types\nimport { VNode, VNodeChildren, PropType } from 'vue'\nimport { PropValidator } from 'vue/types/options'\n\ntype VTreeViewInstance = InstanceType<typeof VTreeview>\n\nconst baseMixins = mixins(\n  Colorable,\n  RegistrableInject('treeview')\n)\n\ninterface options extends ExtractVue<typeof baseMixins> {\n  treeview: VTreeViewInstance\n}\n\nexport const VTreeviewNodeProps = {\n  activatable: Boolean,\n  activeClass: {\n    type: String,\n    default: 'v-treeview-node--active',\n  },\n  color: {\n    type: String,\n    default: 'primary',\n  },\n  expandIcon: {\n    type: String,\n    default: '$subgroup',\n  },\n  indeterminateIcon: {\n    type: String,\n    default: '$checkboxIndeterminate',\n  },\n  itemChildren: {\n    type: String,\n    default: 'children',\n  },\n  itemDisabled: {\n    type: String,\n    default: 'disabled',\n  },\n  itemKey: {\n    type: String,\n    default: 'id',\n  },\n  itemText: {\n    type: String,\n    default: 'name',\n  },\n  loadChildren: Function as PropType<(item: any) => Promise<void>>,\n  loadingIcon: {\n    type: String,\n    default: '$loading',\n  },\n  offIcon: {\n    type: String,\n    default: '$checkboxOff',\n  },\n  onIcon: {\n    type: String,\n    default: '$checkboxOn',\n  },\n  openOnClick: Boolean,\n  rounded: Boolean,\n  selectable: Boolean,\n  selectedColor: {\n    type: String,\n    default: 'accent',\n  },\n  shaped: Boolean,\n  transition: Boolean,\n  selectionType: {\n    type: String as PropType<'leaf' | 'independent'>,\n    default: 'leaf',\n    validator: (v: string) => ['leaf', 'independent'].includes(v),\n  },\n}\n\n/* @vue/component */\nconst VTreeviewNode = baseMixins.extend<options>().extend({\n  name: 'v-treeview-node',\n\n  inject: {\n    treeview: {\n      default: null,\n    },\n  },\n\n  props: {\n    level: Number,\n    item: {\n      type: Object,\n      default: () => null,\n    } as PropValidator<Record<string, unknown> | null>,\n    parentIsDisabled: Boolean,\n    ...VTreeviewNodeProps,\n  },\n\n  data: () => ({\n    hasLoaded: false,\n    isActive: false, // Node is selected (row)\n    isIndeterminate: false, // Node has at least one selected child\n    isLoading: false,\n    isOpen: false, // Node is open/expanded\n    isSelected: false, // Node is selected (checkbox)\n  }),\n\n  computed: {\n    disabled (): boolean {\n      return (\n        getObjectValueByPath(this.item, this.itemDisabled) ||\n        (this.parentIsDisabled && this.selectionType === 'leaf')\n      )\n    },\n    key (): string {\n      return getObjectValueByPath(this.item, this.itemKey)\n    },\n    children (): any[] | null {\n      const children = getObjectValueByPath(this.item, this.itemChildren)\n      return children && children.filter((child: any) => !this.treeview.isExcluded(getObjectValueByPath(child, this.itemKey)))\n    },\n    text (): string {\n      return getObjectValueByPath(this.item, this.itemText)\n    },\n    scopedProps (): object {\n      return {\n        item: this.item,\n        leaf: !this.children,\n        selected: this.isSelected,\n        indeterminate: this.isIndeterminate,\n        active: this.isActive,\n        open: this.isOpen,\n      }\n    },\n    computedIcon (): string {\n      if (this.isIndeterminate) return this.indeterminateIcon\n      else if (this.isSelected) return this.onIcon\n      else return this.offIcon\n    },\n    hasChildren (): boolean {\n      return !!this.children && (!!this.children.length || !!this.loadChildren)\n    },\n  },\n\n  created () {\n    this.treeview.register(this)\n  },\n\n  beforeDestroy () {\n    this.treeview.unregister(this)\n  },\n\n  methods: {\n    checkChildren (): Promise<void> {\n      return new Promise<void>(resolve => {\n        // TODO: Potential issue with always trying\n        // to load children if response is empty?\n        if (!this.children || this.children.length || !this.loadChildren || this.hasLoaded) return resolve()\n\n        this.isLoading = true\n        resolve(this.loadChildren(this.item))\n      }).then(() => {\n        this.isLoading = false\n        this.hasLoaded = true\n      })\n    },\n    open () {\n      this.isOpen = !this.isOpen\n      this.treeview.updateOpen(this.key, this.isOpen)\n      this.treeview.emitOpen()\n    },\n    genLabel () {\n      const children = []\n\n      if (this.$scopedSlots.label) children.push(this.$scopedSlots.label(this.scopedProps))\n      else children.push(this.text)\n\n      return this.$createElement('div', {\n        slot: 'label',\n        staticClass: 'v-treeview-node__label',\n      }, children)\n    },\n    genPrependSlot () {\n      if (!this.$scopedSlots.prepend) return null\n\n      return this.$createElement('div', {\n        staticClass: 'v-treeview-node__prepend',\n      }, this.$scopedSlots.prepend(this.scopedProps))\n    },\n    genAppendSlot () {\n      if (!this.$scopedSlots.append) return null\n\n      return this.$createElement('div', {\n        staticClass: 'v-treeview-node__append',\n      }, this.$scopedSlots.append(this.scopedProps))\n    },\n    genContent () {\n      const children = [\n        this.genPrependSlot(),\n        this.genLabel(),\n        this.genAppendSlot(),\n      ]\n\n      return this.$createElement('div', {\n        staticClass: 'v-treeview-node__content',\n      }, children)\n    },\n    genToggle () {\n      return this.$createElement(VIcon, {\n        staticClass: 'v-treeview-node__toggle',\n        class: {\n          'v-treeview-node__toggle--open': this.isOpen,\n          'v-treeview-node__toggle--loading': this.isLoading,\n        },\n        slot: 'prepend',\n        on: {\n          click: (e: MouseEvent) => {\n            e.stopPropagation()\n\n            if (this.isLoading) return\n\n            this.checkChildren().then(() => this.open())\n          },\n        },\n      }, [this.isLoading ? this.loadingIcon : this.expandIcon])\n    },\n    genCheckbox () {\n      return this.$createElement(VIcon, {\n        staticClass: 'v-treeview-node__checkbox',\n        props: {\n          color: this.isSelected || this.isIndeterminate ? this.selectedColor : undefined,\n          disabled: this.disabled,\n        },\n        on: {\n          click: (e: MouseEvent) => {\n            e.stopPropagation()\n\n            if (this.isLoading) return\n\n            this.checkChildren().then(() => {\n              // We nextTick here so that items watch in VTreeview has a chance to run first\n              this.$nextTick(() => {\n                this.isSelected = !this.isSelected\n                this.isIndeterminate = false\n\n                this.treeview.updateSelected(this.key, this.isSelected)\n                this.treeview.emitSelected()\n              })\n            })\n          },\n        },\n      }, [this.computedIcon])\n    },\n    genLevel (level: number) {\n      return createRange(level).map(() => this.$createElement('div', {\n        staticClass: 'v-treeview-node__level',\n      }))\n    },\n    genNode () {\n      const children = [this.genContent()]\n\n      if (this.selectable) children.unshift(this.genCheckbox())\n\n      if (this.hasChildren) {\n        children.unshift(this.genToggle())\n      } else {\n        children.unshift(...this.genLevel(1))\n      }\n\n      children.unshift(...this.genLevel(this.level))\n\n      return this.$createElement('div', this.setTextColor(this.isActive && this.color, {\n        staticClass: 'v-treeview-node__root',\n        class: {\n          [this.activeClass]: this.isActive,\n        },\n        on: {\n          click: () => {\n            if (this.openOnClick && this.hasChildren) {\n              this.checkChildren().then(this.open)\n            } else if (this.activatable && !this.disabled) {\n              this.isActive = !this.isActive\n              this.treeview.updateActive(this.key, this.isActive)\n              this.treeview.emitActive()\n            }\n          },\n        },\n      }), children)\n    },\n    genChild (item: any, parentIsDisabled: boolean) {\n      return this.$createElement(VTreeviewNode, {\n        key: getObjectValueByPath(item, this.itemKey),\n        props: {\n          activatable: this.activatable,\n          activeClass: this.activeClass,\n          item,\n          selectable: this.selectable,\n          selectedColor: this.selectedColor,\n          color: this.color,\n          expandIcon: this.expandIcon,\n          indeterminateIcon: this.indeterminateIcon,\n          offIcon: this.offIcon,\n          onIcon: this.onIcon,\n          loadingIcon: this.loadingIcon,\n          itemKey: this.itemKey,\n          itemText: this.itemText,\n          itemDisabled: this.itemDisabled,\n          itemChildren: this.itemChildren,\n          loadChildren: this.loadChildren,\n          transition: this.transition,\n          openOnClick: this.openOnClick,\n          rounded: this.rounded,\n          shaped: this.shaped,\n          level: this.level + 1,\n          selectionType: this.selectionType,\n          parentIsDisabled,\n        },\n        scopedSlots: this.$scopedSlots,\n      })\n    },\n    genChildrenWrapper () {\n      if (!this.isOpen || !this.children) return null\n\n      const children = [this.children.map(c => this.genChild(c, this.disabled))]\n\n      return this.$createElement('div', {\n        staticClass: 'v-treeview-node__children',\n      }, children)\n    },\n    genTransition () {\n      return this.$createElement(VExpandTransition, [this.genChildrenWrapper()])\n    },\n  },\n\n  render (h): VNode {\n    const children: VNodeChildren = [this.genNode()]\n\n    if (this.transition) children.push(this.genTransition())\n    else children.push(this.genChildrenWrapper())\n\n    return h('div', {\n      staticClass: 'v-treeview-node',\n      class: {\n        'v-treeview-node--leaf': !this.hasChildren,\n        'v-treeview-node--click': this.openOnClick,\n        'v-treeview-node--disabled': this.disabled,\n        'v-treeview-node--rounded': this.rounded,\n        'v-treeview-node--shaped': this.shaped,\n        'v-treeview-node--selected': this.isSelected,\n      },\n      attrs: {\n        'aria-expanded': String(this.isOpen),\n      },\n    }, children)\n  },\n})\n\nexport default VTreeviewNode\n"],"sourceRoot":"","file":"VTreeviewNode.js"}