<template>
  <div role="tabpanel" class="tab-pane"
       v-bind:class="{hide:!show}"
       v-show="show"
       :transition="transition"
  >
    <slot></slot>
  </div>
</template>

<script>
  import coerceBoolean from 'vue-client/src/vue-strap/src/utils/coerceBoolean.js'

  export default {
    props: {
      header: {
        type: String
      },
      disabled: {
        type: Boolean,
        coerce: coerceBoolean,
        default: false
      }
    },
    data () {
      return {
        index: 0,
        show: false
      }
    },
    watch: {
      'header' (val) {
        // header变化时，通知tabset
        let data = this.$parent.renderData.find((v) => v.comp === this)
        data.header = val
      }
    },
    computed: {
      show () {
        return (this.$parent.active === this.index)
      },
      transition () {
        return this.$parent.effect
      }
    },
    created () {
      this.$parent.renderData.push({
        comp: this,
        header: this.header,
        disabled: this.disabled
      })
    },
    ready () {
      // 找到当前tab的索引
      this.index = this.$parent.$children.findIndex((v) => v.$el === this.$el)
    },
    beforeDestroy () {
      this.$parent.renderData.splice(this.index, 1)
    }
  }
</script>

<style scoped>
  .tab-content > .tab-pane {
    display: block;
  }
</style>
