<template>
  <section class="app-main">
    <transition
      name="fade-transform"
      :mode="cachedViews.includes($route.name) ? 'in-out' : 'out-in'"
      :duration="cachedViews.includes($route.name) ? 0 : 300"
    >
      <keep-alive :include="cachedViews">
        <router-view :key="key" />
      </keep-alive>
    </transition>
  </section>
</template>

<script>
export default {
  name: "AppMain",
  computed: {
    cachedViews() {
      return this.$store.state.tagsView.cachedViews;
    },
    key() {
      // 只使用path作为key，避免查询参数变化导致组件重新创建
      return this.$route.path;
    },
  },
};
</script>

<style lang="scss" scoped>
.app-main {
  /* 50= navbar  50  */
  min-height: calc(100vh - 85px);
  width: 100%;
  position: relative;
  /*overflow: hidden; 先注释掉，有了这里整个的页面无法出现水平滚动条（列表还是可以） */
  overflow-x: visible;
  overflow-y: hidden;
}

.fixed-header + .app-main {
  padding-top: 50px;
}

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

  .fixed-header + .app-main {
    padding-top: 84px;
  }
}
// fix css style bug in open el-dialog
.el-popup-parent--hidden {
  .fixed-header {
    padding-right: 15px;
  }
}
</style>
