优化 table 合计行内数据超过单元格长度时，无法查看全部的问题

src/modules/table.js

@@ -2316,20 +2316,29 @@ layui.define(['lay', 'laytpl', 'laypage', 'form', 'util'], function(exports){
       $(this).remove(); // 移除编辑状态
     });
 
-    // 单元格触发编辑的事件
+    // 表格主体单元格触发编辑的事件
     that.layBody.on(options.editTrigger, 'td', function(e){
       renderGridEdit(this, e)
     }).on('mouseenter', 'td', function(){
-      gridExpand.call(this)
+      showGridExpandIcon.call(this)
     }).on('mouseleave', 'td', function(){
-       gridExpand.call(this, 'hide');
+       showGridExpandIcon.call(this, 'hide');
     });
 
-    //单元格展开图标
-    var ELEM_GRID = 'layui-table-grid', ELEM_GRID_DOWN = 'layui-table-grid-down', ELEM_GRID_PANEL = 'layui-table-grid-panel'
-    ,gridExpand = function(hide){
-      var othis = $(this)
-      ,elemCell = othis.children(ELEM_CELL);
+    // 表格合计栏单元格 hover 显示展开图标
+    that.layTotal.on('mouseenter', 'td', function(){
+      showGridExpandIcon.call(this)
+    }).on('mouseleave', 'td', function(){
+       showGridExpandIcon.call(this, 'hide');
+    });
+
+    // 显示单元格展开图标
+    var ELEM_GRID = 'layui-table-grid';
+    var ELEM_GRID_DOWN = 'layui-table-grid-down';
+    var ELEM_GRID_PANEL = 'layui-table-grid-panel';
+    var showGridExpandIcon = function(hide){
+      var othis = $(this);
+      var elemCell = othis.children(ELEM_CELL);
 
       if(othis.data('off')) return; //不触发事件
 
@@ -2343,12 +2352,11 @@ layui.define(['lay', 'laytpl', 'laypage', 'form', 'util'], function(exports){
         othis.append('<div class="'+ ELEM_GRID_DOWN +'"><i class="layui-icon layui-icon-down"></i></div>');
       }
     };
-
-    //单元格展开事件
-    that.layBody.on('click', '.'+ ELEM_GRID_DOWN, function(e){
-      var othis = $(this)
-      ,td = othis.parent()
-      ,elemCell = td.children(ELEM_CELL);
+    // 单元格内容展开
+    var gridExpand = function(e){
+      var othis = $(this);
+      var td = othis.parent();
+      var elemCell = td.children(ELEM_CELL);
 
       that.tipsIndex = layer.tips([
         '<div class="layui-table-tips-main" style="margin-top: -'+ (elemCell.height() + 23) +'px;'+ function(){
@@ -2359,18 +2367,18 @@ layui.define(['lay', 'laytpl', 'laypage', 'form', 'util'], function(exports){
             return 'padding: 14px 15px;';
           }
           return '';
-        }() +'">'
-          ,elemCell.html()
-        ,'</div>'
-        ,'<i class="layui-icon layui-table-tips-c layui-icon-close"></i>'
+        }() +'">',
+          elemCell.html(),
+        '</div>',
+        '<i class="layui-icon layui-table-tips-c layui-icon-close"></i>'
       ].join(''), elemCell[0], {
-        tips: [3, '']
-        ,time: -1
-        ,anim: -1
-        ,maxWidth: (device.ios || device.android) ? 300 : that.elem.width()/2
-        ,isOutAnim: false
-        ,skin: 'layui-table-tips'
-        ,success: function(layero, index){
+        tips: [3, ''],
+        time: -1,
+        anim: -1,
+        maxWidth: (device.ios || device.android) ? 300 : that.elem.width()/2,
+        isOutAnim: false,
+        skin: 'layui-table-tips',
+        success: function(layero, index){
           layero.find('.layui-table-tips-c').on('click', function(){
             layer.close(index);
           });
@@ -2378,6 +2386,15 @@ layui.define(['lay', 'laytpl', 'laypage', 'form', 'util'], function(exports){
       });
 
       layui.stope(e);
+    };
+
+    // 表格主体单元格展开事件
+    that.layBody.on('click', '.'+ ELEM_GRID_DOWN, function(e){
+      gridExpand.call(this, e);
+    });
+    // 表格合计栏单元格展开事件
+    that.layTotal.on('click', '.'+ ELEM_GRID_DOWN, function(e){
+      gridExpand.call(this, e);
     });
 
     // 行工具条操作事件