javascript table单元格纵向合并和合并还原

合并思路如下：

       1、根据单元格内容或单元格属性找出需要合并的单元格

       2、修改起始单元格colspan值

       3、删除多余的单元格

单元格合并代码如下：

/************************************* table单元格合并 ***********************************************
  合并指定table 指定列 相同数据的单元格 table:table对象  colInx:需要合并的列的index columns:table总列数
  opts:{columns:总列数,skipNull:是否忽略空单元格的合并 mergeAttrName }
 **********************************************************************************************/
 mergeTalbeVCells = function(table,colInx,opts){
   var option = {skipNull:false};
   $.extend(option,opts);
        var cols = option.columns || table.rows[0].cells.length;
  var colArr = [];
  var rows = table.rows.length;
  var n = 1;
  for(var i=0;i<rows;i++){
   var currtxt = '';
   if(option.mergeAttrName){
    currtxt = table.rows[i].cells[colInx - (cols - table.rows[i].cells.length)].getAttribute(option.mergeAttrName);
   }else{
    currtxt = table.rows[i].cells[colInx - (cols - table.rows[i].cells.length)].innerText;
   }
   var nexttxt;
   if(i < rows-1){
    if(option.mergeAttrName){
     nexttxt = table.rows[i+1].cells[colInx - (cols - table.rows[i+1].cells.length)].getAttribute(option.mergeAttrName);
    }else{
     nexttxt = table.rows[i+1].cells[colInx - (cols - table.rows[i+1].cells.length)].innerText;
    }
   }else{
    colArr[colArr.length] = {rowInx:((i+1)-n),rowSpan:n};
   }
   if(currtxt != nexttxt){
    colArr[colArr.length] = {rowInx:(i-n+1),rowSpan:n};
    n = 0;
   }else if(currtxt=="" && nexttxt==""){
    //  是否忽略空字符
    if(option.skipNull){
     colArr[colArr.length] = {rowInx:0,rowSpan:1};
     n = 0;
    }
   }
   n++;
  }
  // 合并相同数据的单元格
  for(var i=0;i<colArr.length;i++){
   table.rows[colArr[i].rowInx].cells[colInx - (cols - table.rows[colArr[i].rowInx].cells.length)].rowSpan = colArr[i].rowSpan;
   for(var j=1;j<colArr[i].rowSpan;j++){
    table.rows[colArr[i].rowInx*1+j].deleteCell(colInx - (cols - table.rows[colArr[i].rowInx*1+j].cells.length));
   }
  }
}

 还原合并代码如下：

 

/******* 还原合并 *******/
 var restoreMergeTable = function(table,colInx,opts){
  var option = {skipNull:false};
  $.extend(option,opts);
  var cols = option.columns || table.rows[0].cells.length;
  var colArr = [];
  var rows = table.rows.length;
  var n = 1;
  for(var i=0;i<rows;i++){
   var cell = getCellByColInx(table.rows[i],colInx);
   if(!cell) continue;
   var rowSpan = cell.getAttribute("rowSpan");
   if(rowSpan<2) continue;
   for(var ri=1;ri<rowSpan;ri++){
     copyCell(table.rows[i+ri].insertCell(0),cell,_this.option.userDatas);
   }
   cell.rowSpan = 1;
  }
 

  /************** 复制单元格 **************/
  function copyCell(res_cell,target_cell,attributes){
   res_cell.innerHTML = target_cell.innerHTML;
   if(attributes){
    for(var i=0,len=attributes.length;i<len;i++){
     res_cell.setAttribute(attributes[i],target_cell.getAttribute(attributes[i]));
    }
   }
   res_cell.setAttribute("columnId",target_cell.getAttribute("columnId"));
    }
 }