<template>
  <section class="app-main">
    <transition name="fade-transform" mode="out-in">
      <keep-alive :include="keepAliveInclude">
        <router-view v-if="!$route.meta.link" :key="key" />
      </keep-alive>
    </transition>
    <iframe-toggle />
    <copyright />
  </section>
</template>

<script>
import copyright from "./Copyright/index"
import iframeToggle from "./IframeToggle/index"

export default {
  name: 'AppMain',
  components: { iframeToggle, copyright },
  computed: {
    cachedViews() {
      return this.$store.state.tagsView.cachedViews
    },
    // cachedViews 为空时勿传 []：Vue2 keep-alive 的 include 为 [] 会匹配不到任何组件，部分环境下首屏空白
    keepAliveInclude() {
      const list = this.cachedViews
      return list && list.length ? list : undefined
    },
    key() {
      return this.$route.path
    }
  },
  watch: {
    $route() {
      this.addIframe()
    }
  },
  mounted() {
    this.addIframe()
  },
  methods: {
    addIframe() {
      const { name } = this.$route
      if (name && this.$route.meta.link) {
        this.$store.dispatch('tagsView/addIframeView', this.$route)
      }
    }
  }
}
</script>

<style lang="scss" scoped>
.app-main {
  /* 50= navbar  50  */
  min-height: calc(100vh - 50px);
  width: 100%;
  position: relative;
  overflow: hidden;
  
  @media (max-width: 768px) {
    min-height: calc(100vh - 48px - 60px); // 减去头部和底部导航
    overflow-x: hidden;
    overflow-y: visible;
    -webkit-overflow-scrolling: touch;
    height: auto;
    max-height: none;
    position: static;
  }
}

.app-main:has(.copyright) {
  padding-bottom: 36px;
  
  @media (max-width: 768px) {
    padding-bottom: 30px;
  }
}

.fixed-header + .app-main {
  padding-top: 50px;
  
  @media (max-width: 768px) {
    padding-top: 48px;
  }
}

.hasTagsView {
  .app-main {
    /* 84 = navbar + tags-view = 50 + 34 */
    min-height: calc(100vh - 84px);
    
    @media (max-width: 768px) {
      min-height: calc(100vh - 48px);
    }
  }

  .fixed-header + .app-main {
    padding-top: 84px;
    
    @media (max-width: 768px) {
      padding-top: 48px;
    }
  }
}
</style>

<style lang="scss">
// fix css style bug in open el-dialog
.el-popup-parent--hidden {
  .fixed-header {
    padding-right: 6px;
  }
}

::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background-color: #f1f1f1;
}

::-webkit-scrollbar-thumb {
  background-color: #c0c0c0;
  border-radius: 3px;
}
</style>
