change code structure

src/components/SqlTable/index.vue

@@ -0,0 +1,113 @@
+<template>
+  <div>
+    <div class="rounded-bg">
+      <div class="header-container" ref="header-container">
+        <div>
+          <div
+            v-for="(th, index) in header"
+            class="fixed-header"
+            :style="{ width: `${th.width}px` }"
+            :key="index"
+          >
+            {{ th.name }}
+          </div>
+      </div>
+      </div>
+      <div
+        class="table-container"
+        ref="table-container"
+        @scroll="onScrollTable"
+        :style="{maxHeight: `${height}px`}"
+      >
+      <table ref="table">
+        <thead>
+          <tr>
+            <th v-for="(th,index) in dataSet.columns" :key="index" ref="th">
+              <div class="cell-data" :style="cellStyle">{{ th }}</div>
+            </th>
+          </tr>
+        </thead>
+        <tbody>
+          <tr v-for="(row,index) in currentPageData" :key="index">
+            <td v-for="(value, valIndex) in row" :key="valIndex">
+              <div class="cell-data" :style="cellStyle">{{ value }}</div>
+            </td>
+          </tr>
+        </tbody>
+      </table>
+      </div>
+    </div>
+    <div class="table-footer">
+      <div class="table-footer-count">
+        {{ dataSet.values.length}} {{dataSet.values.length === 1 ? 'row' : 'rows'}} retrieved
+        <span v-if="preview">for preview</span>
+      </div>
+      <pager v-show="pageCount > 1" :page-count="pageCount" v-model="currentPage" />
+    </div>
+  </div>
+</template>
+
+<script>
+import Pager from './Pager'
+
+export default {
+  name: 'SqlTable',
+  components: { Pager },
+  props: ['dataSet', 'height', 'preview'],
+  data () {
+    return {
+      header: null,
+      tableWidth: null,
+      currentPage: 1,
+      resizeObserver: null
+    }
+  },
+  computed: {
+    cellStyle () {
+      const eq = this.tableWidth / this.dataSet.columns.length
+
+      return { maxWidth: `${Math.max(eq, 100)}px` }
+    },
+    pageSize () {
+      return Math.max(Math.floor(this.height / 40), 20)
+    },
+    pageCount () {
+      return Math.ceil(this.dataSet.values.length / this.pageSize)
+    },
+    currentPageData () {
+      const start = (this.currentPage - 1) * this.pageSize
+      return this.dataSet.values.slice(start, start + this.pageSize)
+    }
+  },
+  methods: {
+    calculateHeadersWidth () {
+      this.tableWidth = this.$refs['table-container'].offsetWidth
+      this.$nextTick(() => {
+        this.header = this.$refs.th.map(th => {
+          return { name: th.innerText, width: th.getBoundingClientRect().width }
+        })
+      })
+    },
+    onScrollTable () {
+      this.$refs['header-container'].scrollLeft = this.$refs['table-container'].scrollLeft
+    }
+  },
+  mounted () {
+    this.resizeObserver = new ResizeObserver(this.calculateHeadersWidth)
+    this.resizeObserver.observe(this.$refs.table)
+    this.calculateHeadersWidth()
+  },
+  beforeDestroy () {
+    this.resizeObserver.unobserve(this.$refs.table)
+  },
+  watch: {
+    currentPageData: 'calculateHeadersWidth',
+    dataSet () {
+      this.currentPage = 1
+    }
+  }
+}
+</script>
+
+<style scoped>
+</style>