element-plus/es/components/tabs/src/tab-nav.mjs.map

A Component Library for Vue 3

{"version":3,"file":"tab-nav.mjs","sources":["../../../../../../packages/components/tabs/src/tab-nav.tsx"],"sourcesContent":["import {\n  computed,\n  defineComponent,\n  inject,\n  nextTick,\n  onMounted,\n  onUpdated,\n  ref,\n  shallowRef,\n  triggerRef,\n  watch,\n} from 'vue'\nimport {\n  useDocumentVisibility,\n  useElementSize,\n  useResizeObserver,\n  useWindowFocus,\n} from '@vueuse/core'\nimport {\n  buildProps,\n  capitalize,\n  definePropType,\n  getEventCode,\n  mutable,\n  rAF,\n  throwError,\n} from '@element-plus/utils'\nimport { EVENT_CODE } from '@element-plus/constants'\nimport { ElIcon } from '@element-plus/components/icon'\nimport { ArrowLeft, ArrowRight, Close } from '@element-plus/icons-vue'\nimport { useNamespace } from '@element-plus/hooks'\nimport useWheel from '@element-plus/components/virtual-list/src/hooks/use-wheel'\nimport { clamp } from 'lodash-unified'\nimport TabBar from './tab-bar.vue'\nimport { tabsRootContextKey } from './constants'\n\nimport type {\n  CSSProperties,\n  ComponentPublicInstance,\n  ExtractPropTypes,\n  ExtractPublicPropTypes,\n} from 'vue'\nimport type { TabBarInstance } from './tab-bar'\nimport type { TabPaneName, TabsPaneContext } from './constants'\n\ninterface Scrollable {\n  next?: boolean\n  prev?: number\n}\n\nexport const tabNavProps = buildProps({\n  panes: {\n    type: definePropType<TabsPaneContext[]>(Array),\n    default: () => mutable([] as const),\n  },\n  currentName: {\n    type: [String, Number],\n    default: '',\n  },\n  editable: Boolean,\n  type: {\n    type: String,\n    values: ['card', 'border-card', ''],\n    default: '',\n  },\n  stretch: Boolean,\n  /**\n   * @description tab-nav tabindex\n   */\n  tabindex: {\n    type: [String, Number],\n    default: undefined,\n  },\n} as const)\n\nexport const tabNavEmits = {\n  tabClick: (tab: TabsPaneContext, tabName: TabPaneName, ev: Event) =>\n    ev instanceof Event,\n  tabRemove: (tab: TabsPaneContext, ev: Event) => ev instanceof Event,\n}\n\nexport type TabNavProps = ExtractPropTypes<typeof tabNavProps>\nexport type TabNavPropsPublic = ExtractPublicPropTypes<typeof tabNavProps>\nexport type TabNavEmits = typeof tabNavEmits\n\nconst COMPONENT_NAME = 'ElTabNav'\nconst TabNav = defineComponent({\n  name: COMPONENT_NAME,\n  props: tabNavProps,\n  emits: tabNavEmits,\n  setup(props, { expose, emit }) {\n    const rootTabs = inject(tabsRootContextKey)\n    if (!rootTabs) throwError(COMPONENT_NAME, `<el-tabs><tab-nav /></el-tabs>`)\n\n    const ns = useNamespace('tabs')\n    const visibility = useDocumentVisibility()\n    const focused = useWindowFocus()\n\n    const navScroll$ = ref<HTMLDivElement>()\n    const nav$ = ref<HTMLDivElement>()\n    const el$ = ref<HTMLDivElement>()\n    const tabRefsMap = ref<{ [key: TabPaneName]: HTMLDivElement }>({})\n\n    const tabBarRef = ref<TabBarInstance>()\n\n    const scrollable = ref<false | Scrollable>(false)\n    const navOffset = ref(0)\n    const isFocus = ref(false)\n    const focusable = ref(true)\n    const tracker = shallowRef()\n\n    const isHorizontal = computed(() =>\n      ['top', 'bottom'].includes(rootTabs.props.tabPosition)\n    )\n\n    const sizeName = computed(() => (isHorizontal.value ? 'width' : 'height'))\n    const navStyle = computed<CSSProperties>(() => {\n      const dir = sizeName.value === 'width' ? 'X' : 'Y'\n      return {\n        transform: `translate${dir}(-${navOffset.value}px)`,\n      }\n    })\n\n    const { width: navContainerWidth, height: navContainerHeight } =\n      useElementSize(navScroll$)\n    const { width: navWidth, height: navHeight } = useElementSize(\n      nav$,\n      { width: 0, height: 0 },\n      { box: 'border-box' }\n    )\n\n    const navContainerSize = computed(() =>\n      isHorizontal.value ? navContainerWidth.value : navContainerHeight.value\n    )\n    const navSize = computed(() =>\n      isHorizontal.value ? navWidth.value : navHeight.value\n    )\n\n    const { onWheel } = useWheel(\n      {\n        atStartEdge: computed(() => navOffset.value <= 0),\n        atEndEdge: computed(\n          () => navSize.value - navOffset.value <= navContainerSize.value\n        ),\n        layout: computed(() =>\n          isHorizontal.value ? 'horizontal' : 'vertical'\n        ),\n      },\n      (offset) => {\n        navOffset.value = clamp(\n          navOffset.value + offset,\n          0,\n          navSize.value - navContainerSize.value\n        )\n      }\n    )\n\n    const scrollPrev = () => {\n      if (!navScroll$.value) return\n\n      const containerSize =\n        navScroll$.value[`offset${capitalize(sizeName.value)}`]\n      const currentOffset = navOffset.value\n\n      if (!currentOffset) return\n\n      const newOffset =\n        currentOffset > containerSize ? currentOffset - containerSize : 0\n\n      navOffset.value = newOffset\n    }\n\n    const scrollNext = () => {\n      if (!navScroll$.value || !nav$.value) return\n\n      const navSize = nav$.value[`offset${capitalize(sizeName.value)}`]\n      const containerSize =\n        navScroll$.value[`offset${capitalize(sizeName.value)}`]\n      const currentOffset = navOffset.value\n\n      if (navSize - currentOffset <= containerSize) return\n\n      const newOffset =\n        navSize - currentOffset > containerSize * 2\n          ? currentOffset + containerSize\n          : navSize - containerSize\n\n      navOffset.value = newOffset\n    }\n\n    const scrollToActiveTab = async () => {\n      const nav = nav$.value\n      if (!scrollable.value || !el$.value || !navScroll$.value || !nav) return\n\n      await nextTick()\n\n      const activeTab = tabRefsMap.value[props.currentName]\n      if (!activeTab) return\n\n      const navScroll = navScroll$.value\n\n      const activeTabBounding = activeTab.getBoundingClientRect()\n      const navScrollBounding = navScroll.getBoundingClientRect()\n      const maxOffset = isHorizontal.value\n        ? nav.offsetWidth - navScrollBounding.width\n        : nav.offsetHeight - navScrollBounding.height\n      const currentOffset = navOffset.value\n      let newOffset = currentOffset\n\n      if (isHorizontal.value) {\n        if (activeTabBounding.left < navScrollBounding.left) {\n          newOffset =\n            currentOffset - (navScrollBounding.left - activeTabBounding.left)\n        }\n        if (activeTabBounding.right > navScrollBounding.right) {\n          newOffset =\n            currentOffset + activeTabBounding.right - navScrollBounding.right\n        }\n      } else {\n        if (activeTabBounding.top < navScrollBounding.top) {\n          newOffset =\n            currentOffset - (navScrollBounding.top - activeTabBounding.top)\n        }\n        if (activeTabBounding.bottom > navScrollBounding.bottom) {\n          newOffset =\n            currentOffset +\n            (activeTabBounding.bottom - navScrollBounding.bottom)\n        }\n      }\n      newOffset = Math.max(newOffset, 0)\n      navOffset.value = Math.min(newOffset, maxOffset)\n    }\n\n    const update = () => {\n      if (!nav$.value || !navScroll$.value) return\n\n      props.stretch && tabBarRef.value?.update()\n\n      const navSize = nav$.value[`offset${capitalize(sizeName.value)}`]\n      const containerSize =\n        navScroll$.value[`offset${capitalize(sizeName.value)}`]\n      const currentOffset = navOffset.value\n\n      if (containerSize < navSize) {\n        scrollable.value = scrollable.value || {}\n        scrollable.value.prev = currentOffset\n        scrollable.value.next = currentOffset + containerSize < navSize\n        if (navSize - currentOffset < containerSize) {\n          navOffset.value = navSize - containerSize\n        }\n      } else {\n        scrollable.value = false\n        if (currentOffset > 0) {\n          navOffset.value = 0\n        }\n      }\n    }\n\n    const changeTab = (event: KeyboardEvent) => {\n      const code = getEventCode(event)\n      let step = 0\n\n      switch (code) {\n        case EVENT_CODE.left:\n        case EVENT_CODE.up:\n          step = -1\n          break\n        case EVENT_CODE.right:\n        case EVENT_CODE.down:\n          step = 1\n          break\n        default:\n          return\n      }\n\n      const tabList = Array.from(\n        (\n          event.currentTarget as HTMLDivElement\n        ).querySelectorAll<HTMLDivElement>('[role=tab]:not(.is-disabled)')\n      )\n      const currentIndex = tabList.indexOf(event.target as HTMLDivElement)\n      let nextIndex = currentIndex + step\n\n      if (nextIndex < 0) {\n        nextIndex = tabList.length - 1\n      } else if (nextIndex >= tabList.length) {\n        nextIndex = 0\n      }\n\n      tabList[nextIndex].focus({ preventScroll: true }) // 改变焦点元素\n      tabList[nextIndex].click() // 选中下一个tab\n      setFocus()\n    }\n\n    const setFocus = () => {\n      if (focusable.value) isFocus.value = true\n    }\n    const removeFocus = () => (isFocus.value = false)\n\n    const setRefs = (\n      el: Element | ComponentPublicInstance | null,\n      key: TabPaneName\n    ) => {\n      tabRefsMap.value[key] = el as HTMLDivElement\n    }\n\n    const focusActiveTab = async () => {\n      await nextTick()\n\n      const activeTab = tabRefsMap.value[props.currentName]\n      activeTab?.focus({ preventScroll: true })\n    }\n\n    watch(visibility, (visibility) => {\n      if (visibility === 'hidden') {\n        focusable.value = false\n      } else if (visibility === 'visible') {\n        setTimeout(() => (focusable.value = true), 50)\n      }\n    })\n    watch(focused, (focused) => {\n      if (focused) {\n        setTimeout(() => (focusable.value = true), 50)\n      } else {\n        focusable.value = false\n      }\n    })\n\n    useResizeObserver(el$, () => {\n      rAF(update)\n    })\n\n    onMounted(() => setTimeout(() => scrollToActiveTab(), 0))\n    onUpdated(() => update())\n\n    expose({\n      scrollToActiveTab,\n      removeFocus,\n      focusActiveTab,\n      tabListRef: nav$,\n      tabBarRef,\n      scheduleRender: () => triggerRef(tracker),\n    })\n\n    return () => {\n      const scrollBtn = scrollable.value\n        ? [\n            <span\n              class={[\n                ns.e('nav-prev'),\n                ns.is('disabled', !scrollable.value.prev),\n              ]}\n              onClick={scrollPrev}\n            >\n              <ElIcon>\n                <ArrowLeft />\n              </ElIcon>\n            </span>,\n            <span\n              class={[\n                ns.e('nav-next'),\n                ns.is('disabled', !scrollable.value.next),\n              ]}\n              onClick={scrollNext}\n            >\n              <ElIcon>\n                <ArrowRight />\n              </ElIcon>\n            </span>,\n          ]\n        : null\n\n      const tabs = props.panes.map((pane, index) => {\n        const uid = pane.uid\n        const disabled = pane.props.disabled\n        const tabName = pane.props.name ?? pane.index ?? `${index}`\n        const closable =\n          !disabled &&\n          (pane.isClosable || (pane.props.closable !== false && props.editable))\n        pane.index = `${index}`\n\n        const btnClose = closable ? (\n          <ElIcon\n            class=\"is-icon-close\"\n            // `onClick` not exist when generate dts\n\n            // @ts-ignore\n            onClick={(ev: MouseEvent) => emit('tabRemove', pane, ev)}\n          >\n            <Close />\n          </ElIcon>\n        ) : null\n\n        const tabLabelContent = pane.slots.label?.() || pane.props.label\n        const tabindex =\n          !disabled && pane.active\n            ? (props.tabindex ?? rootTabs.props.tabindex)\n            : -1\n\n        return (\n          <div\n            ref={(el) => setRefs(el, tabName)}\n            class={[\n              ns.e('item'),\n              ns.is(rootTabs.props.tabPosition),\n              ns.is('active', pane.active),\n              ns.is('disabled', disabled),\n              ns.is('closable', closable),\n              ns.is('focus', isFocus.value),\n            ]}\n            id={`tab-${tabName}`}\n            key={`tab-${uid}`}\n            aria-controls={`pane-${tabName}`}\n            role=\"tab\"\n            aria-selected={pane.active}\n            tabindex={tabindex}\n            onFocus={() => setFocus()}\n            onBlur={() => removeFocus()}\n            onClick={(ev: MouseEvent) => {\n              removeFocus()\n              emit('tabClick', pane, tabName, ev)\n            }}\n            onKeydown={(ev: KeyboardEvent) => {\n              const code = getEventCode(ev)\n              if (\n                closable &&\n                (code === EVENT_CODE.delete || code === EVENT_CODE.backspace)\n              ) {\n                emit('tabRemove', pane, ev)\n              }\n            }}\n          >\n            {...[tabLabelContent, btnClose]}\n          </div>\n        )\n      })\n\n      // By tracking the value property, we can schedule a job to re-render `TabNav` when needed.\n      // Unlike `instance.update`, the scheduler ensures the job is queued only once even if we trigger it multiple times.\n      tracker.value\n\n      return (\n        <div\n          ref={el$}\n          class={[\n            ns.e('nav-wrap'),\n            ns.is('scrollable', !!scrollable.value),\n            ns.is(rootTabs.props.tabPosition),\n          ]}\n        >\n          {scrollBtn}\n          <div class={ns.e('nav-scroll')} ref={navScroll$}>\n            {props.panes.length > 0 ? (\n              <div\n                class={[\n                  ns.e('nav'),\n                  ns.is(rootTabs.props.tabPosition),\n                  ns.is(\n                    'stretch',\n                    props.stretch &&\n                      ['top', 'bottom'].includes(rootTabs.props.tabPosition)\n                  ),\n                ]}\n                ref={nav$}\n                style={navStyle.value}\n                role=\"tablist\"\n                onKeydown={changeTab}\n                onWheel={onWheel}\n              >\n                {...[\n                  !props.type ? 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