{"version":3,"file":"tabs.js","sources":["../../../../../../packages/components/tabs/src/tabs.tsx"],"sourcesContent":["import {\n  computed,\n  createVNode,\n  defineComponent,\n  getCurrentInstance,\n  nextTick,\n  provide,\n  ref,\n  renderSlot,\n  watch,\n} from 'vue'\nimport {\n  buildProps,\n  definePropType,\n  isNumber,\n  isString,\n  isUndefined,\n} from '@element-plus/utils'\nimport { EVENT_CODE, UPDATE_MODEL_EVENT } from '@element-plus/constants'\nimport ElIcon from '@element-plus/components/icon'\nimport { Plus } from '@element-plus/icons-vue'\nimport { useNamespace, useOrderedChildren } from '@element-plus/hooks'\nimport { tabsRootContextKey } from './constants'\nimport TabNav from './tab-nav'\n\nimport type { TabNavInstance } from './tab-nav'\nimport type { TabsPaneContext } from './constants'\nimport type { ExtractPropTypes, FunctionalComponent, VNode } from 'vue'\nimport type { Awaitable } from '@element-plus/utils'\n\nexport type TabPaneName = string | number\n\nexport const tabsProps = buildProps({\n  /**\n   * @description type of Tab\n   */\n  type: {\n    type: String,\n    values: ['card', 'border-card', ''],\n    default: '',\n  },\n  /**\n   * @description whether Tab is closable\n   */\n  closable: Boolean,\n  /**\n   * @description whether Tab is addable\n   */\n  addable: Boolean,\n  /**\n   * @description binding value, name of the selected tab\n   */\n  modelValue: {\n    type: [String, Number],\n  },\n  /**\n   * @description whether Tab is addable and closable\n   */\n  editable: Boolean,\n  /**\n   * @description position of tabs\n   */\n  tabPosition: {\n    type: String,\n    values: ['top', 'right', 'bottom', 'left'],\n    default: 'top',\n  },\n  /**\n   * @description hook function before switching tab. If `false` is returned or a `Promise` is returned and then is rejected, switching will be prevented\n   */\n  beforeLeave: {\n    type: definePropType<\n      (newName: TabPaneName, oldName: TabPaneName) => Awaitable<void | boolean>\n    >(Function),\n    default: () => true,\n  },\n  /**\n   * @description whether width of tab automatically fits its container\n   */\n  stretch: Boolean,\n} as const)\nexport type TabsProps = ExtractPropTypes<typeof tabsProps>\n\nconst isPaneName = (value: unknown): value is string | number =>\n  isString(value) || isNumber(value)\n\nexport const tabsEmits = {\n  [UPDATE_MODEL_EVENT]: (name: TabPaneName) => isPaneName(name),\n  tabClick: (pane: TabsPaneContext, ev: Event) => ev instanceof Event,\n  tabChange: (name: TabPaneName) => isPaneName(name),\n  edit: (paneName: TabPaneName | undefined, action: 'remove' | 'add') =>\n    ['remove', 'add'].includes(action),\n  tabRemove: (name: TabPaneName) => isPaneName(name),\n  tabAdd: () => true,\n}\nexport type TabsEmits = typeof tabsEmits\n\nexport type TabsPanes = Record<number, TabsPaneContext>\n\nconst Tabs = defineComponent({\n  name: 'ElTabs',\n\n  props: tabsProps,\n  emits: tabsEmits,\n\n  setup(props, { emit, slots, expose }) {\n    const ns = useNamespace('tabs')\n\n    const isVertical = computed(() =>\n      ['left', 'right'].includes(props.tabPosition)\n    )\n\n    const {\n      children: panes,\n      addChild: sortPane,\n      removeChild: unregisterPane,\n    } = useOrderedChildren<TabsPaneContext>(getCurrentInstance()!, 'ElTabPane')\n\n    const nav$ = ref<TabNavInstance>()\n    const currentName = ref<TabPaneName>(props.modelValue ?? '0')\n\n    const setCurrentName = async (value?: TabPaneName, trigger = false) => {\n      // should do nothing.\n      if (currentName.value === value || isUndefined(value)) return\n\n      try {\n        const canLeave = await props.beforeLeave?.(value, currentName.value)\n        if (canLeave !== false) {\n          currentName.value = value\n          if (trigger) {\n            emit(UPDATE_MODEL_EVENT, value)\n            emit('tabChange', value)\n          }\n\n          nav$.value?.removeFocus?.()\n        }\n      } catch {}\n    }\n\n    const handleTabClick = (\n      tab: TabsPaneContext,\n      tabName: TabPaneName,\n      event: Event\n    ) => {\n      if (tab.props.disabled) return\n      setCurrentName(tabName, true)\n      emit('tabClick', tab, event)\n    }\n\n    const handleTabRemove = (pane: TabsPaneContext, ev: Event) => {\n      if (pane.props.disabled || isUndefined(pane.props.name)) return\n      ev.stopPropagation()\n      emit('edit', pane.props.name, 'remove')\n      emit('tabRemove', pane.props.name)\n    }\n\n    const handleTabAdd = () => {\n      emit('edit', undefined, 'add')\n      emit('tabAdd')\n    }\n\n    watch(\n      () => props.modelValue,\n      (modelValue) => setCurrentName(modelValue)\n    )\n\n    watch(currentName, async () => {\n      await nextTick()\n      nav$.value?.scrollToActiveTab()\n    })\n\n    provide(tabsRootContextKey, {\n      props,\n      currentName,\n      registerPane: (pane: TabsPaneContext) => {\n        panes.value.push(pane)\n      },\n      sortPane,\n      unregisterPane,\n    })\n\n    expose({\n      currentName,\n    })\n    const TabNavRenderer: FunctionalComponent<{ render: () => VNode }> = ({\n      render,\n    }) => {\n      return render()\n    }\n    return () => {\n      const addSlot = slots['add-icon']\n      const newButton =\n        props.editable || props.addable ? (\n          <div\n            class={[\n              ns.e('new-tab'),\n              isVertical.value && ns.e('new-tab-vertical'),\n            ]}\n            tabindex=\"0\"\n            onClick={handleTabAdd}\n            onKeydown={(ev: KeyboardEvent) => {\n              if (ev.code === EVENT_CODE.enter) handleTabAdd()\n            }}\n          >\n            {addSlot ? (\n              renderSlot(slots, 'add-icon')\n            ) : (\n              <ElIcon class={ns.is('icon-plus')}>\n                <Plus />\n              </ElIcon>\n            )}\n          </div>\n        ) : null\n\n      const header = (\n        <div\n          class={[\n            ns.e('header'),\n            isVertical.value && ns.e('header-vertical'),\n            ns.is(props.tabPosition),\n          ]}\n        >\n          <TabNavRenderer\n            render={() => {\n              const hasLabelSlot = panes.value.some((pane) => pane.slots.label)\n              return createVNode(\n                TabNav,\n                {\n                  ref: nav$,\n                  currentName: currentName.value,\n                  editable: props.editable,\n                  type: props.type,\n                  panes: panes.value,\n                  stretch: props.stretch,\n                  onTabClick: handleTabClick,\n                  onTabRemove: handleTabRemove,\n                },\n                { $stable: !hasLabelSlot }\n              )\n            }}\n          />\n          {newButton}\n        </div>\n      )\n\n      const panels = (\n        <div class={ns.e('content')}>{renderSlot(slots, 'default')}</div>\n      )\n\n      return (\n        <div\n          class={[\n            ns.b(),\n            ns.m(props.tabPosition),\n            {\n              [ns.m('card')]: props.type === 'card',\n              [ns.m('border-card')]: props.type === 'border-card',\n            },\n          ]}\n        >\n          {panels}\n          {header}\n        </div>\n      )\n    }\n  },\n})\n\nexport type TabsInstance = InstanceType<typeof Tabs> & {\n  currentName: TabPaneName\n}\n\nexport default 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