fix(treeTable): 删除子节点时，内部缓存未同步的问题；节点移动后，点击事件中行索引获取错误 (#1760)

* fix(treeTable): 删除子节点时，内部缓存未同步的问题

* perf(treeTable): 减少不必要的缓存更新

* fix(treeTable): 节点移动后，点击事件中行索引获取错误

* refactor: 改进 724c011

src/modules/table.js

@@ -2285,7 +2285,8 @@ layui.define(['lay', 'laytpl', 'laypage', 'form', 'util'], function(exports){
     //数据行中的事件返回的公共对象成员
     var commonMember = that.commonMember = function(sets){
       var othis = $(this);
-      var index = othis.parents('tr').eq(0).data('index');
+      // treeTable 中使用 attr('data-index'), tr 更新时 jQuery 的缓存会导致获取到错误的 index
+      var index = othis.parents('tr').eq(0).attr('data-index');
       var tr = that.layBody.find('tr[data-index="'+ index +'"]');
       var data = table.cache[that.key] || [];
 

src/modules/treeTable.js

@@ -95,7 +95,7 @@ layui.define(['table'], function (exports) {
     layui.each(data || tableCache, function (index, item) {
       var itemDataIndex = item[LAY_DATA_INDEX] || '';
       if (itemDataIndex.indexOf('-') !== -1) {
-        tableCache[itemDataIndex] = item
+        tableCache[itemDataIndex] = item;
       }
       item[childrenKey] && updateCache(id, childrenKey, item[childrenKey]);
     })
@@ -505,15 +505,19 @@ layui.define(['table'], function (exports) {
     var isParentKey = customName.isParent;
     var childrenKey = customName.children;
 
-    layui.each(data, function (i1, item1) {
-      if (!(isParentKey in item1)) {
-        item1[isParentKey] = !!(item1[childrenKey] && item1[childrenKey].length);
-      }
-      item1[LAY_DATA_INDEX_HISTORY] = item1[LAY_DATA_INDEX];
-      item1[LAY_PARENT_INDEX] = parentIndex = parentIndex || '';
-      var dataIndex = item1[LAY_DATA_INDEX] = (parentIndex ? parentIndex + '-' : '') + i1;
-      that.initData(item1[childrenKey] || [], dataIndex);
-    });
+    var update = function(data, parentIndex){
+      layui.each(data, function (i1, item1) {
+        if (!(isParentKey in item1)) {
+          item1[isParentKey] = !!(item1[childrenKey] && item1[childrenKey].length);
+        }
+        item1[LAY_DATA_INDEX_HISTORY] = item1[LAY_DATA_INDEX];
+        item1[LAY_PARENT_INDEX] = parentIndex = parentIndex || '';
+        var dataIndex = item1[LAY_DATA_INDEX] = (parentIndex ? parentIndex + '-' : '') + i1;
+        update(item1[childrenKey] || [], dataIndex);
+      });
+    }
+
+    update(data, parentIndex);
 
     updateCache(tableId, childrenKey, data);
 
@@ -1257,17 +1261,38 @@ layui.define(['table'], function (exports) {
     var tableView = options.elem.next();
     var delNode;
     var indexArr = [];
+    var tableCache = table.cache[id];
     delNode = that.getNodeDataByIndex(layui.type(node) === 'string' ? node : node[LAY_DATA_INDEX], false, 'delete');
     var nodeP = that.getNodeDataByIndex(delNode[LAY_PARENT_INDEX]);
     that.updateCheckStatus(nodeP);
     var delNodesFlat = that.treeToFlat([delNode], delNode[treeOptions.customName.pid], delNode[LAY_PARENT_INDEX]);
-    layui.each(delNodesFlat, function (i2, item2) {
-      indexArr.push('tr[lay-data-index="' + item2[LAY_DATA_INDEX] + '"]');
+    layui.each(delNodesFlat, function (i2, delNode) {
+      var delNodeDataIndex = delNode[LAY_DATA_INDEX];
+      indexArr.push('tr[lay-data-index="' + delNodeDataIndex + '"]');
+      // 删除临时 key
+      if(delNodeDataIndex.indexOf('-') !== -1){
+        delete tableCache[delNodeDataIndex]; 
+      }
     })
 
     tableView.find(indexArr.join(',')).remove(); // 删除行
+
+    var deleteCacheKey = function(){
+      for (var key in tableCache) {
+        // 根节点 getNodeDataByIndex 内部已处理
+        if(key.indexOf('-') !== -1){
+          // L93 updateCache() 中，cacheKey 取自 rowData 中的 LAY_DATA_INDEX，
+          // 两者不同说明当前 cacheKey 引用的 rowData 已被更新
+          if(key !== tableCache[key][LAY_DATA_INDEX]){
+            delete tableCache[key]
+          }
+        }
+      }
+    }
+
     // 重新整理数据
     var tableData = that.initData();
+    deleteCacheKey();
     // index发生变化需要更新页面tr中对应的lay-data-index 新增和删除都要注意数据结构变动之后的index问题
     layui.each(that.treeToFlat(tableData), function (i3, item3) {
       if (item3[LAY_DATA_INDEX_HISTORY] && item3[LAY_DATA_INDEX_HISTORY] !== item3[LAY_DATA_INDEX]) {
@@ -1279,7 +1304,7 @@ layui.define(['table'], function (exports) {
       }
     });
     // 重新更新顶层节点的data-index;
-    layui.each(table.cache[id], function (i4, item4) {
+    layui.each(tableCache, function (i4, item4) {
       tableView.find('tr[data-level="0"][lay-data-index="' + item4[LAY_DATA_INDEX] + '"]').attr('data-index', i4);
     })
     options.hasNumberCol && formatNumber(that);