content: /*******************************************************************************
   * Copyright 2017 Bstek
   *
   * Licensed under the Apache License, Version 2.0 (the "License"); you may not
   * use this file except in compliance with the License.  You may obtain a copy
   * of the License at
   *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
   * License for the specific language governing permissions and limitations under
   * the License.
   ******************************************************************************/
  package com.bstek.ureport.expression.model.expr;
  
  import com.bstek.ureport.build.Context;
  import com.bstek.ureport.exception.ReportComputeException;
  import com.bstek.ureport.expression.model.data.ExpressionData;
  import com.bstek.ureport.expression.model.data.ObjectExpressionData;
  import com.bstek.ureport.expression.model.expr.set.CellExpression;
  import com.bstek.ureport.model.Cell;
  
  import java.util.List;
  import java.util.Map;
  
  /**
   * @author
   * @since 4月5日
   */
  public class CellPositionExpression extends CellExpression {
  	private static final long serialVersionUID = 6881039873078990276L;
  
  	public CellPositionExpression(String cellName) {
  		super(cellName);
  	}
  	@Override
  	public boolean supportPaging(){
  		return false;
  	}
  	@Override
  	protected ExpressionData<?> compute(Cell cell,Cell currentCell, Context context) {
  		List<Cell> targetCells=fetchCellsByLeftParent(context,cell,cellName);
  		if(targetCells==null || targetCells.size()==0){
  			targetCells=fetchCellsByTopParent(context,cell,cellName);
  		}
  		if(targetCells==null || targetCells.size()==0){
  			targetCells=context.getReport().getCellsMap().get(cellName);
  		}
  		if(targetCells==null){
  			throw new ReportComputeException("Cell ["+cellName+"] not exist.");
  		}
  		int index=-1;
  		int rowNumber=cell.getRow().getRowNumber(),colNumber=cell.getColumn().getColumnNumber();
  		for(int i=0;i<targetCells.size();i++){
  			Cell target=targetCells.get(i);
  			if(target.getRow()==cell.getRow()){
  				index=i;
  				break;
  			}
  			int rowSpan=target.getRowSpan();
  			if(rowSpan>0){
  				int targetRowStart=target.getRow().getRowNumber();
  				int targetRowEnd=targetRowStart+rowSpan-1;
  				if(targetRowStart<=rowNumber && targetRowEnd>=rowNumber){
  					index=i;
  					break;
  				}
  			}
  		}
  		if(index>-1){
  			index++;
  			return new ObjectExpressionData(index);
  		}
  		for(int i=0;i<targetCells.size();i++){
  			Cell target=targetCells.get(i);
  			if(target.getColumn()==cell.getColumn()){
  				index=i;
  				break;
  			}
  			int colSpan=target.getColSpan();
  			if(colSpan>0){
  				int targetColStart=target.getColumn().getColumnNumber();
  				int targetColEnd=targetColStart+colSpan-1;
  				if(targetColStart<=colNumber && targetColEnd>=colNumber){
  					index=i;
  					break;
  				}
  			}
  		}
  		index++;
  		return new ObjectExpressionData(index);
  	}
  
  	private List<Cell> fetchCellsByLeftParent(Context context,Cell cell,String cellName){
  		Cell leftParentCell=cell.getLeftParentCell();
  		if(leftParentCell==null){
  			return null;
  		}
  		Map<String,List<Cell>> childrenCellsMap=leftParentCell.getRowChildrenCellsMap();
  		List<Cell> targetCells=childrenCellsMap.get(cellName);
  		if(targetCells!=null){
  			return targetCells;
  		}
  		return fetchCellsByLeftParent(context,leftParentCell,cellName);
  	}
  
  	private List<Cell> fetchCellsByTopParent(Context context,Cell cell,String cellName){
  		Cell topParentCell=cell.getTopParentCell();
  		if(topParentCell==null){
  			return null;
  		}
  		Map<String,List<Cell>> childrenCellsMap=topParentCell.getColumnChildrenCellsMap();
  		List<Cell> targetCells=childrenCellsMap.get(cellName);
  		if(targetCells!=null){
  			return targetCells;
  		}
  		return fetchCellsByTopParent(context,topParentCell,cellName);
  	}
  }
  