Sunji-posv-net/pos/POSV.Template/Component/TableMerge.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using POSV.Entity;
using POSV.Utils;

namespace POSV.Component
{
    public class TableMerge
    {
        public static List<Table> Merge(int rows , int cols , List<Table> dataSource , bool touchEnabled)
        {
            //启用触摸屏，不分页
            if (touchEnabled)
            {
                return dataSource;
            }

            //移除可能存在的分页标识
            dataSource.RemoveAll(x => Constant.PREV_PAGER.Equals(x.Name) || Constant.NEXT_PAGER.Equals(x.Name));

            int pageSize = rows * cols;
            int totalCount = dataSource.Count;

            //启用分页
            int pageCount = ((totalCount - 1) + (pageSize - 2) - 1) / (pageSize - 2);

            int offset = 0;
            int i = 1;
            for (; i < pageCount; i++)
            {
                offset += (pageSize - 1);
                if(i == 1)
                {
                    //第一页，最后一位加下一页
                    Table entity = new Table();
                    entity.Id = IdWorkerUtils.Instance.NextId();
                    entity.Name = Constant.NEXT_PAGER;
                    entity.Pager = i + 1;
                    dataSource.Insert(offset , entity);
                }
                else
                {
                    //中间页，最后加前后
                    var entity = new Table();
                    entity.Id = IdWorkerUtils.Instance.NextId();
                    entity.Name = Constant.PREV_PAGER;
                    entity.Pager = i - 1;
                    dataSource.Insert(offset - 1, entity);

                    entity = new Table();
                    entity.Id = IdWorkerUtils.Instance.NextId();
                    entity.Name = Constant.NEXT_PAGER;
                    entity.Pager = i + 1;
                    dataSource.Insert(offset, entity);

                }
                offset ++;
            }

            if (pageCount > 1)
            {
                //最后一页，最后一位加上一页

                var entity = new Table();
                entity.Id = IdWorkerUtils.Instance.NextId();
                entity.Name = Constant.PREV_PAGER;
                entity.Pager = i - 1;

                dataSource.Insert(offset, entity);
            }

            return dataSource;
        }
    }
}