ligerui.grid.extend.rowSpan

扩展LigerUI的Grid中的相同列合并行功能，代码如下：
$.extend($.ligerui.controls.Grid.prototype, {
    _getHtmlFromData:function(data, frozen) {
        if (!data) return "";
        var g = this, p = this.options;
        var gridhtmlarr = [];
        var rowSpanData = {};
        var islast = false;
        for (var i = 0, l = data.length; i < l; i++)
        {
            islast = (i==data.length-1);
            var item = data[i];
            var rowid = item['__id'];
            if (!item) continue;
            gridhtmlarr.push('<tr');
            gridhtmlarr.push(' id="' + g._getRowDomId(item, frozen) + '"');
            gridhtmlarr.push(' class="l-grid-row'); //class start
            if (!frozen && g.enabledCheckbox() && p.isChecked && p.isChecked(item))
            {
                g.select(item);
                gridhtmlarr.push(' l-selected');
            }
            else if (g.isSelected(item))
            {
                gridhtmlarr.push(' l-selected');
            }
            else if (p.isSelected && p.isSelected(item))
            {
                g.select(item);
                gridhtmlarr.push(' l-selected');
            }
            if (item['__index'] % 2 == 1 && p.alternatingRow)
                gridhtmlarr.push(' l-grid-row-alt');
            //自定义css class
            if (p.rowClsRender)
            {
                var rowcls = p.rowClsRender(item, rowid);
                rowcls && gridhtmlarr.push(' ' + rowcls);
            }
            gridhtmlarr.push('" ');  //class end
            if (p.rowAttrRender) gridhtmlarr.push(p.rowAttrRender(item, rowid));
            if (p.tree && g.collapsedRows && g.collapsedRows.length)
            {
                var isHide = function ()
                {
                    var pitem = g.getParent(item);
                    while (pitem)
                    {
                        if ($.inArray(pitem, g.collapsedRows) != -1) return true;
                        pitem = g.getParent(pitem);
                    }
                    return false;
                };
                if (isHide()) gridhtmlarr.push(' style="display:none;" ');
            }
            else if (p.tree && p.tree.isExtend)
            {
                var isHide = function ()
                {
                    var pitem = g.getParent(item);
                    while (pitem)
                    {
                        if (p.tree.isExtend(pitem) == false) return true;
                        pitem = g.getParent(pitem);
                    }
                    return false;
                };
                if (isHide()) gridhtmlarr.push(' style="display:none;" ');
            }
            gridhtmlarr.push('>');
            $(g.columns).each(function (columnindex, column)
            {
                if (frozen != column.frozen) return;
                if(column.rowSpan){
                    var key = column.name;
                    var data = rowSpanData[key];
                    var value = g._getCellContent(item, column);
                    if(data){
                        if(data.value==value){
                            data.count = data.count+1;
                            rowSpanData[key] = data;
                            if(!islast){
                                return true;
                            }
                        }else{
                            if((data.domId&&data.count>1)){
                                var rowSpanTd = 'id="'+data.domId+'"';
                                $.each(gridhtmlarr,function(index,str){
                                    if(rowSpanTd==$.trim(str)){
                                        str = str+" rowspan="+data.count;
                                        gridhtmlarr[index] = str;
                                    }
                                });
                            }
                            data = {value:value,count:1,domId:g._getCellDomId(item, this)};
                            rowSpanData[key] = data;
                        }
                        if(islast){
                            if((data.domId&&data.count>1)){
                                var rowSpanTd = 'id="'+data.domId+'"';
                                $.each(gridhtmlarr,function(index,str){
                                    if(rowSpanTd==$.trim(str)){
                                        str = str+" rowspan="+data.count;
                                        gridhtmlarr[index] = str;
                                    }
                                });
                                return true;
                            }
                        }
                    }else{
                        data = {value:value,count:1,domId:g._getCellDomId(item, this)};
                        rowSpanData[key] = data;
                    }
                }
                gridhtmlarr.push('<td');
                gridhtmlarr.push(' id="' + g._getCellDomId(item, this) + '"');
                //如果是行序号(系统列)
                if (this.isrownumber)
                {
                    gridhtmlarr.push(' class="l-grid-row-cell l-grid-row-cell-rownumbers" style="' + this.width + 'px"><div class="l-grid-row-cell-inner"');
                    if (p.fixedCellHeight)
                        gridhtmlarr.push(' style = "height:' + p.rowHeight + 'px;" ');
                    else
                        gridhtmlarr.push(' style = "min-height:' + p.rowHeight + 'px;" ');
                    gridhtmlarr.push('>' + (parseInt(item['__index']) + 1) + '</div></td>');
                    return;
                }
                //如果是复选框(系统列)
                if (this.ischeckbox)
                {
                    gridhtmlarr.push(' class="l-grid-row-cell l-grid-row-cell-checkbox" style="' + this.width + 'px"><div class="l-grid-row-cell-inner"');
                    if (p.fixedCellHeight)
                        gridhtmlarr.push(' style = "height:' + p.rowHeight + 'px;" ');
                    else
                        gridhtmlarr.push(' style = "min-height:' + p.rowHeight + 'px;" ');
                    gridhtmlarr.push('>');
                    gridhtmlarr.push('<span class="l-grid-row-cell-btn-checkbox"></span>');
                    gridhtmlarr.push('</div></td>');
                    return;
                }
                //如果是明细列(系统列)
                else if (this.isdetail)
                {
                    gridhtmlarr.push(' class="l-grid-row-cell l-grid-row-cell-detail" style="' + this.width + 'px"><div class="l-grid-row-cell-inner"');
                    if (p.fixedCellHeight)
                        gridhtmlarr.push(' style = "height:' + p.rowHeight + 'px;" ');
                    else
                        gridhtmlarr.push(' style = "min-height:' + p.rowHeight + 'px;" ');
                    gridhtmlarr.push('>');
                    if (!p.isShowDetailToggle || p.isShowDetailToggle(item))
                    {
                        gridhtmlarr.push('<span class="l-grid-row-cell-detailbtn"></span>');
                    }
                    gridhtmlarr.push('</div></td>');
                    return;
                }
                var colwidth = this._width;
                gridhtmlarr.push(' class="l-grid-row-cell ');
                if (g.changedCells[rowid + "_" + this['__id']]) gridhtmlarr.push("l-grid-row-cell-edited ");
                if (this.islast)
                    gridhtmlarr.push('l-grid-row-cell-last ');
                gridhtmlarr.push('"');
                //if (this.columnname) gridhtmlarr.push('columnname="' + this.columnname + '"');
                gridhtmlarr.push(' style = "');
                gridhtmlarr.push('' + colwidth + 'px; ');
                if (column._hide)
                {
                    gridhtmlarr.push('display:none;');
                }
                gridhtmlarr.push(' ">');
                gridhtmlarr.push(g._getCellHtml(item, column));
                gridhtmlarr.push('</td>');
            });
            gridhtmlarr.push('</tr>');
        }
        return gridhtmlarr.join('');
    }
});
但我们往往在合并行时，是需要根据行的其他值来判断，譬如订单号不同，那其后面的行就不能合并成一行，因为如果合并成一行，反而不清晰，最佳的办法是如果前面的列不同，后面的列合并时，不能跨行合并
以上代码稍作调整：

        if (column.rowSpan) {//如果列定义了合并行 update zjy
                        var key = column.name;
                        var data = rowSpanData[key]; //获取合并行的合集
                        var value = g._getCellContent(item, column);//这个行对应列的值
                        if (data) {//存在, 在循环第二行或者多行的情况下，判断是否和上一行有相同的值，如果有相同，表示合并1行+1，
                            if (data.value == value) {
                                data.count = data.count + 1;//合并的行数
                                rowSpanData[key] = data;//重新赋值到集合
                                if (!islast) {
                                    return true;
                                }
                            } else {
                                //如果相同的列名，但和上一行不一致，那就重新赋值，重新赋值之前，将之前的rowspan赋值。
                                if ((data.domId && data.count > 1)) {
                                    var rowSpanTd = 'id="' + data.domId + '"';
                                    $.each(gridhtmlarr, function (index, str) {
                                        if (rowSpanTd == $.trim(str)) {
                                            str = str + " rowspan=" + data.count;
                                            gridhtmlarr[index] = str;
                                        }
                                    });

                                    $(g.columns).each(function (x, m) {
                                        if (m.rowSpan) {
                                            if (data.orderseq < x) {
                                                var _find = rowSpanData[m.name]; //获取合并行的合集
                                                if (_find) {
                                                    if ((_find.domId && _find.count > 1)) {
                                                        var _findRowSpanTd = 'id="' + _find.domId + '"';
                                                        $.each(gridhtmlarr, function (_index, _str) {
                                                            if (_findRowSpanTd == $.trim(_str)) {
                                                                _str = _str + " rowspan=" + _find.count;
                                                                gridhtmlarr[_index] = _str;
                                                            }
                                                        });
                                                    }
                                                    //data = { value: g._getCellContent(item, m), count: 1, domId: g._getCellDomId(item, this), orderseq: x };
                                                    rowSpanData[m.name] = null; //置空
                                                }
                                            }

                                        }

                                    });
                                }
                                else if (data.domId && data.count == 1) {
                                    $(g.columns).each(function (x, m) {
                                        if (m.rowSpan) {
                                            if (data.orderseq < x) {
                                                var _find = rowSpanData[m.name]; //获取合并行的合集
                                                if (_find) {
                                                    if ((_find.domId && _find.count > 1)) {
                                                        var _findRowSpanTd = 'id="' + _find.domId + '"';
                                                        $.each(gridhtmlarr, function (_index, _str) {
                                                            if (_findRowSpanTd == $.trim(_str)) {
                                                                _str = _str + " rowspan=" + _find.count;
                                                                gridhtmlarr[_index] = _str;
                                                            }
                                                        });
                                                    }
                                                    rowSpanData[m.name] = null; //置空
                                                }
                                            }
                                        }
                                    });
                                }
                                //重新将这个列名赋值到集合列
                                data = { value: value, count: 1, domId: g._getCellDomId(item, this), orderseq: columnindex };
                                rowSpanData[key] = data;
                                //rowSpanData[key] = null;
                            }
                            if (islast) {
                                //最后一个直接赋值rowSpan
                                if ((data.domId && data.count > 1)) {
                                    var rowSpanTd = 'id="' + data.domId + '"';
                                    $.each(gridhtmlarr, function (index, str) {
                                        if (rowSpanTd == $.trim(str)) {
                                            str = str + " rowspan=" + data.count;
                                            gridhtmlarr[index] = str;
                                        }
                                    });
                                    return true;
                                }
                            }
                        } else {
                            //没有在合并行中出现，就是第一个，将这个值保存在临时合并行集合中

                            data = { value: value, count: 1, domId: g._getCellDomId(item, this), orderseq: columnindex };
                            rowSpanData[key] = data;
                        }
                    }

    columns: [ { rowSpan: true }]