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Styles\nimport '../../stylus/components/_tabs.styl'\n\n// Extensions\nimport { BaseItemGroup } from '../VItemGroup/VItemGroup'\n\n// Component level mixins\nimport TabsComputed from './mixins/tabs-computed'\nimport TabsGenerators from './mixins/tabs-generators'\nimport TabsProps from './mixins/tabs-props'\nimport TabsTouch from './mixins/tabs-touch'\nimport TabsWatchers from './mixins/tabs-watchers'\n\n// Mixins\nimport Colorable from '../../mixins/colorable'\nimport SSRBootable from '../../mixins/ssr-bootable'\nimport Themeable from '../../mixins/themeable'\n\n// Directives\nimport Resize from '../../directives/resize'\nimport Touch from '../../directives/touch'\nimport { deprecate } from '../../util/console'\n\n// Utils\nimport ThemeProvider from '../../util/ThemeProvider'\n\n/* @vue/component */\nexport default BaseItemGroup.extend({\n  name: 'v-tabs',\n\n  directives: {\n    Resize,\n    Touch\n  },\n\n  mixins: [\n    Colorable,\n    SSRBootable,\n    TabsComputed,\n    TabsProps,\n    TabsGenerators,\n    TabsTouch,\n    TabsWatchers,\n    Themeable\n  ],\n\n  provide () {\n    return {\n      tabGroup: this,\n      tabProxy: this.tabProxy,\n      registerItems: this.registerItems,\n      unregisterItems: this.unregisterItems\n    }\n  },\n\n  data () {\n    return {\n      bar: [],\n      content: [],\n      isOverflowing: false,\n      nextIconVisible: false,\n      prevIconVisible: false,\n      resizeTimeout: null,\n      scrollOffset: 0,\n      sliderWidth: null,\n      sliderLeft: null,\n      startX: 0,\n      tabItems: null,\n      transitionTime: 300,\n      widths: {\n        bar: 0,\n        container: 0,\n        wrapper: 0\n      }\n    }\n  },\n\n  watch: {\n    items: 'onResize',\n    tabs: 'onResize'\n  },\n\n  mounted () {\n    this.init()\n  },\n\n  methods: {\n    checkIcons () {\n      this.prevIconVisible = this.checkPrevIcon()\n      this.nextIconVisible = this.checkNextIcon()\n    },\n    checkPrevIcon () {\n      return this.scrollOffset > 0\n    },\n    checkNextIcon () {\n      // Check one scroll ahead to know the width of right-most item\n      return this.widths.container > this.scrollOffset + this.widths.wrapper\n    },\n    callSlider () {\n      if (this.hideSlider || !this.activeTab) return false\n\n      // Give screen time to paint\n      const activeTab = this.activeTab\n\n      this.$nextTick(() => {\n        /* istanbul ignore if */\n        if (!activeTab || !activeTab.$el) return\n        this.sliderWidth = activeTab.$el.scrollWidth\n        this.sliderLeft = activeTab.$el.offsetLeft\n      })\n    },\n    // Do not process\n    // until DOM is\n    // painted\n    init () {\n      /* istanbul ignore next */\n      if (this.$listeners['input']) {\n        deprecate('@input', '@change', this)\n      }\n    },\n    /**\n     * When v-navigation-drawer changes the\n     * width of the container, call resize\n     * after the transition is complete\n     */\n    onResize () {\n      if (this._isDestroyed) return\n\n      this.setWidths()\n\n      const delay = this.isBooted ? this.transitionTime : 0\n\n      clearTimeout(this.resizeTimeout)\n      this.resizeTimeout = setTimeout(this.updateTabsView, delay)\n    },\n    overflowCheck (e, fn) {\n      this.isOverflowing && fn(e)\n    },\n    scrollTo (direction) {\n      this.scrollOffset = this.newOffset(direction)\n    },\n    setOverflow () {\n      this.isOverflowing = this.widths.bar < this.widths.container\n    },\n    setWidths () {\n      const bar = this.$refs.bar ? this.$refs.bar.clientWidth : 0\n      const container = this.$refs.container ? this.$refs.container.clientWidth : 0\n      const wrapper = this.$refs.wrapper ? this.$refs.wrapper.clientWidth : 0\n\n      this.widths = { bar, container, wrapper }\n\n      this.setOverflow()\n    },\n    parseNodes () {\n      const item = []\n      const items = []\n      const slider = []\n      const tab = []\n      const length = (this.$slots.default || []).length\n\n      for (let i = 0; i < length; i++) {\n        const vnode = this.$slots.default[i]\n\n        if (vnode.componentOptions) {\n          switch (vnode.componentOptions.Ctor.options.name) {\n            case 'v-tabs-slider': slider.push(vnode)\n              break\n            case 'v-tabs-items': items.push(vnode)\n              break\n            case 'v-tab-item': item.push(vnode)\n              break\n            // case 'v-tab' - intentionally omitted\n            default: tab.push(vnode)\n          }\n        } else {\n          tab.push(vnode)\n        }\n      }\n\n      return { tab, slider, items, item }\n    },\n    registerItems (fn) {\n      this.tabItems = fn\n      fn(this.internalValue)\n    },\n    unregisterItems () {\n      this.tabItems = null\n    },\n    updateTabsView () {\n      this.callSlider()\n      this.scrollIntoView()\n      this.checkIcons()\n    },\n    scrollIntoView () {\n      /* istanbul ignore next */\n      if (!this.activeTab) return\n      if (!this.isOverflowing) return (this.scrollOffset = 0)\n\n      const totalWidth = this.widths.wrapper + this.scrollOffset\n      const { clientWidth, offsetLeft } = this.activeTab.$el\n      const itemOffset = clientWidth + offsetLeft\n      let additionalOffset = clientWidth * 0.3\n\n      if (this.activeTab === this.items[this.items.length - 1]) {\n        additionalOffset = 0 // don't add an offset if selecting the last tab\n      }\n\n      /* istanbul ignore else */\n      if (offsetLeft < this.scrollOffset) {\n        this.scrollOffset = Math.max(offsetLeft - additionalOffset, 0)\n      } else if (totalWidth < itemOffset) {\n        this.scrollOffset -= totalWidth - itemOffset - additionalOffset\n      }\n    },\n    tabProxy (val) {\n      this.internalValue = val\n    }\n  },\n\n  render (h) {\n    const { tab, slider, items, item } = this.parseNodes()\n\n    return h('div', {\n      staticClass: 'v-tabs',\n      directives: [{\n        name: 'resize',\n        modifiers: { quiet: true },\n        value: this.onResize\n      }]\n    }, [\n      this.genBar([this.hideSlider ? null : this.genSlider(slider), tab]),\n      h(ThemeProvider, {\n        props: { dark: this.theme.isDark, light: !this.theme.isDark }\n      }, [\n        this.genItems(items, item)\n      ])\n    ])\n  }\n})\n"],"sourceRoot":""}