Merge pull request #1 from WeBankFinTech/dev-0.9.0

Dev 0.9.0

Author: yuchenyao

web/src/js/component/table/index.js

@@ -15,7 +15,7 @@
  *
  */
 
-import WeTable from './table.vue';
+import WeTable from './resultTable/table.vue';
 import historyTable from './historyTable/historyTable.vue';
 
 export default { WeTable,

web/src/js/component/table/resultTable/body.vue

@@ -0,0 +1,285 @@
+<template>
+  <div>
+    <div class="list-view-phantom" :style="{
+      width: contentWidth + 'px'
+    }">
+    </div>
+    <div ref="content" class="list-view-content" :class="{ header:type === 'header' }">
+      <div class="list-view-item" :style="{
+        width: sizeAndOffsetCahce[startIndex + index].size + 'px'
+      }" v-for="(col, index) in visibleData" :key="index">
+        <slot :col="col" :index="index"></slot>
+      </div>
+    </div>
+  </div>
+</template>
+<script>
+export default {
+  props: {
+    cache: {
+      type: Object,
+      default: () => {
+        return {};
+      },
+    },
+    isListenScroll: {
+      type: Boolean,
+      default: false,
+    },
+    data: {
+      type: Array,
+      required: true,
+    },
+
+    estimatedItemSize: {
+      type: Number,
+      default: 30,
+    },
+
+    itemSizeGetter: {
+      type: Function,
+    },
+    header: {
+      type: Array,
+      default: () => [],
+    },
+    type: String,
+  },
+
+  data() {
+    return {
+      viewWidth: 0,
+      lastMeasuredIndex: -1,
+      startIndex: 0,
+      sizeAndOffsetCahce: {},
+      visibleData: [],
+      ops: {
+        bar: {
+          background: 'rgb(24, 144, 255)',
+          keepShow: true,
+          minSize: 0.1,
+        },
+        rail: {
+          border: '1px solid #cecece',
+          size: '20px',
+        },
+        scrollButton: {
+          enable: true,
+          background: '#cecece',
+        },
+      },
+      cacheVH: {
+        v: {},
+        h: {
+          scrollLeft: 0,
+        },
+      },
+      isDivideWidth: false,
+      divideWidth: 0,
+    };
+  },
+  computed: {
+    contentWidth() {
+      const {
+        data,
+        lastMeasuredIndex,
+        estimatedItemSize
+      } = this;
+      let itemCount = data.length;
+      if (lastMeasuredIndex >= 0) {
+        const lastMeasuredSizeAndOffset = this.getLastMeasuredSizeAndOffset();
+        return lastMeasuredSizeAndOffset.offset + lastMeasuredSizeAndOffset.size + (itemCount - 1 -
+            lastMeasuredIndex) * estimatedItemSize;
+      } else {
+        return itemCount * estimatedItemSize;
+      }
+    },
+  },
+  watch: {
+    data: {
+      handler() {
+        this.resize();
+      },
+      deep: true,
+    },
+  },
+  mounted() {
+    this.setItemWidth();
+  },
+  methods: {
+    setItemWidth(isDataChange) {
+      this.viewWidth = this.$refs.content.clientWidth;
+      let count = 0;
+      this.header.forEach((item, index) => {
+        count += this.getItemSizeAndOffset(this.startIndex + index).size;
+      });
+      // 如果所有已分配宽度的列宽度和小于表格的宽度，就使用等比宽度
+      if (count && count <= this.viewWidth) {
+        this.isDivideWidth = true;
+        this.divideWidth = this.viewWidth / this.header.length;
+        let offset = 0;
+        for (const i in this.sizeAndOffsetCahce) {
+          if (this.sizeAndOffsetCahce.hasOwnProperty(i)) {
+            this.sizeAndOffsetCahce[i] = {
+              size: this.divideWidth,
+              offset,
+            };
+            this.cache[i] = this.divideWidth;
+            offset += this.divideWidth;
+          }
+        }
+      }
+      if (isDataChange) {
+        let {
+          v,
+          h
+        } = this.cacheVH;
+        this.handleScroll(v, h);
+      } else {
+        this.updateVisibleData();
+      }
+    },
+    getItemSizeAndOffset(index) {
+      const {
+        lastMeasuredIndex,
+        sizeAndOffsetCahce,
+        data,
+        itemSizeGetter,
+        header
+      } = this;
+      if (lastMeasuredIndex >= index) {
+        return sizeAndOffsetCahce[index];
+      }
+      let offset = 0;
+      if (lastMeasuredIndex >= 0) {
+        const lastMeasured = sizeAndOffsetCahce[lastMeasuredIndex];
+        if (lastMeasured) {
+          offset = lastMeasured.offset + lastMeasured.size;
+        }
+      }
+      for (let i = lastMeasuredIndex + 1; i <= index; i++) {
+        let item = header[i];
+        let size;
+        if (this.isDivideWidth) {
+          size = this.divideWidth;
+          this.cache[i] = size;
+        } else {
+          if (this.cache[i]) {
+            size = this.cache[i];
+          } else {
+            size = itemSizeGetter.call(null, item, i);
+            this.cache[i] = size;
+          }
+        }
+        sizeAndOffsetCahce[i] = {
+          size,
+          offset,
+        };
+        offset += size;
+      }
+      if (index > lastMeasuredIndex) {
+        this.lastMeasuredIndex = index;
+      }
+      return sizeAndOffsetCahce[index];
+    },
+
+    getLastMeasuredSizeAndOffset() {
+      return this.lastMeasuredIndex >= 0 ? this.sizeAndOffsetCahce[this.lastMeasuredIndex] : {
+        offset: 0,
+        size: 0
+      };
+    },
+
+    findNearestItemIndex(scrollLeft) {
+      const {
+        data
+      } = this;
+      let total = 0;
+      for (let i = 0, j = data.length; i < j; i++) {
+        const size = this.getItemSizeAndOffset(i).size;
+        total += size;
+        if (total >= scrollLeft || i === j - 1) {
+          return i;
+        }
+      }
+
+      return 0;
+    },
+
+    updateVisibleData(scrollLeft) {
+      let canScrollWidth = this.contentWidth - this.viewWidth;
+      scrollLeft = scrollLeft || 0;
+      if (scrollLeft > canScrollWidth) {
+        scrollLeft = canScrollWidth;
+      }
+      const start = this.findNearestItemIndex(scrollLeft);
+      const end = this.findNearestItemIndex(scrollLeft + (this.$el.clientWidth || 1400));
+      this.visibleData = this.data.slice(start, Math.min(end + 3, this.data.length));
+      this.startIndex = start;
+      this.$refs.content.style.webkitTransform = `translate3d(${this.getItemSizeAndOffset(start).offset}px, 0, 0)`;
+    },
+
+    handleScroll(v, h) {
+      const {
+        scrollLeft
+      } = h;
+      this.cacheVH = {
+        v,
+        h
+      };
+      this.$emit('on-scroll', {
+        v,
+        h
+      });
+      this.updateVisibleData(scrollLeft);
+    },
+
+    resize() {
+      this.reset();
+      this.setItemWidth(true);
+    },
+
+    reset() {
+      this.viewWidth = 0;
+      this.lastMeasuredIndex = -1;
+      this.startIndex = 0;
+      this.sizeAndOffsetCahce = {};
+      this.visibleData = [];
+      this.isDivideWidth = false;
+      this.divideWidth = 0;
+    },
+  },
+  beforeDestroy(){
+
+  }
+};
+
+</script>
+<style>
+  .list-view-phantom {
+    position: absolute;
+    left: 0;
+    top: 0;
+    right: 0;
+    z-index: -1;
+    height: 100%;
+  }
+
+  .list-view-content {
+    display: flex;
+    left: 0;
+    right: 0;
+    top: 0;
+    position: absolute;
+    height: 100%;
+  }
+
+  .list-view-item {
+    height: 100%;
+    color: #666;
+    box-sizing: border-box;
+    flex-shrink: 0;
+    text-align: center;
+  }
+
+</style>