PR:15537 - set active cell in sheet; submitted by Brian Sanders

git-svn-id: https://svn.apache.org/repos/asf/jakarta/poi/trunk@352960 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/poi/hssf/model/Sheet.java

@@ -81,6 +81,7 @@ import org.apache.poi.hssf.record
  * @author  Glen Stampoultzis (glens at apache.org)
  * @author  Shawn Laubach (slaubach at apache dot org) Gridlines, Headers, Footers, and PrintSetup
  * @author Jason Height (jheight at chariot dot net dot au) Clone support
+ * @author  Brian Sanders (kestrel at burdell dot org) Active Cell support
  *
  * @see org.apache.poi.hssf.model.Workbook
  * @see org.apache.poi.hssf.usermodel.HSSFSheet
@@ -108,6 +109,7 @@ public class Sheet implements Model
     protected FooterRecord              footer           = null;
     protected PrintGridlinesRecord      printGridlines   = null;
     protected MergeCellsRecord          merged           = null;
+    protected SelectionRecord           selection        = null;
     protected int                       mergedloc        = 0;
     private static POILogger            log              = POILogFactory.getLogger(Sheet.class);
     private ArrayList                   columnSizes      = null;  // holds column info
@@ -252,6 +254,10 @@ public class Sheet implements Model
             {
                 retval.printSetup = (PrintSetupRecord) rec;
             }
+            else if ( rec.getSid() == SelectionRecord.sid )
+            {
+                retval.selection = (SelectionRecord) rec;
+            }
 
             if (rec != null)
             {
@@ -376,7 +382,9 @@ public class Sheet implements Model
         records.add(retval.dims);
         records.add(retval.createWindowTwo());
         retval.setLoc(records.size() - 1);
-        records.add(retval.createSelection());
+        retval.selection = 
+                (SelectionRecord) retval.createSelection();
+        records.add(retval.selection);
         records.add(retval.createEOF());
         retval.records = records;
         log.log(log.DEBUG, "Sheet createsheet from scratch exit");
@@ -1936,6 +1944,66 @@ public class Sheet implements Model
         return retval;
     }
     
+    /**
+     * Returns the active row
+     *
+     * @see org.apache.poi.hssf.record.SelectionRecord
+     * @return row the active row index
+     */
+    public int getActiveCellRow()
+    {
+        if (selection == null)
+        {
+            return 0;
+        }
+        return selection.getActiveCellRow();
+    }
+    
+    /**
+     * Sets the active row
+     *
+     * @param row the row index
+     * @see org.apache.poi.hssf.record.SelectionRecord
+     */
+    public void setActiveCellRow(int row)
+    {
+        //shouldn't have a sheet w/o a SelectionRecord, but best to guard anyway
+        if (selection != null)
+        {
+            selection.setActiveCellRow(row);
+        }
+    }
+    
+    /**
+     * Returns the active column
+     *
+     * @see org.apache.poi.hssf.record.SelectionRecord
+     * @return row the active column index
+     */
+    public short getActiveCellCol()
+    {
+        if (selection == null)
+        {
+            return (short) 0;
+        }
+        return selection.getActiveCellCol();
+    }
+    
+    /**
+     * Sets the active column
+     *
+     * @param col the column index
+     * @see org.apache.poi.hssf.record.SelectionRecord
+     */
+    public void setActiveCellCol(short col)
+    {
+        //shouldn't have a sheet w/o a SelectionRecord, but best to guard anyway
+        if (selection != null)
+        {
+            selection.setActiveCellCol(col);
+        }
+    }
+
     protected Record createMergedCells()
     {
         MergeCellsRecord retval = new MergeCellsRecord();

src/java/org/apache/poi/hssf/usermodel/HSSFCell.java

@@ -95,6 +95,7 @@ import java.util.Calendar;
  *
  * @author  Andrew C. Oliver (acoliver at apache dot org)
  * @author  Dan Sherman (dsherman at isisph.com)
+ * @author  Brian Sanders (kestrel at burdell dot org) Active Cell support
  * @version 1.0-pre
  */
 
@@ -973,4 +974,13 @@ public class HSSFCell
           throw new RuntimeException("You cannot reference columns with an index of less then 0.");
       }
     }
+    
+    /**
+     * Sets this cell as the active cell for the worksheet
+     */
+    public void setAsActiveCell()
+    {
+        this.sheet.setActiveCellRow(this.row);
+        this.sheet.setActiveCellCol(this.cellNum);
+    }
 }

src/testcases/org/apache/poi/hssf/usermodel/TestHSSFCell.java

@@ -177,6 +177,54 @@ extends TestCase {
         stream.close();
     }
     
+    /**
+     * Tests that the active cell can be correctly read and set
+     */
+    public void testActiveCell() throws Exception
+    {
+        //read in sample
+        String dir = System.getProperty("HSSF.testdata.path");
+        File sample = new File(dir + "/Simple.xls");
+        assertTrue("Simple.xls exists and is readable", sample.canRead());
+        FileInputStream fis = new FileInputStream(sample);
+        HSSFWorkbook book = new HSSFWorkbook(fis);
+        fis.close();
+        
+        //check initial position
+        HSSFSheet umSheet = book.getSheetAt(0);
+        Sheet s = umSheet.getSheet();
+        assertEquals("Initial active cell should be in col 0",
+            (short) 0, s.getActiveCellCol());
+        assertEquals("Initial active cell should be on row 1",
+            1, s.getActiveCellRow());
+        
+        //modify position through HSSFCell
+        HSSFCell cell = umSheet.createRow(3).createCell((short) 2);
+        cell.setAsActiveCell();
+        assertEquals("After modify, active cell should be in col 2",
+            (short) 2, s.getActiveCellCol());
+        assertEquals("After modify, active cell should be on row 3",
+            3, s.getActiveCellRow());
+        
+        //write book to temp file; read and verify that position is serialized
+        File temp = File.createTempFile("testActiveCell", ".xls");
+        FileOutputStream fos = new FileOutputStream(temp);
+        book.write(fos);
+        fos.close();
+        
+        fis = new FileInputStream(temp);
+        book = new HSSFWorkbook(fis);
+        fis.close();
+        temp.delete();
+        umSheet = book.getSheetAt(0);
+        s = umSheet.getSheet();
+        
+        assertEquals("After serialize, active cell should be in col 2",
+            (short) 2, s.getActiveCellCol());
+        assertEquals("After serialize, active cell should be on row 3",
+            3, s.getActiveCellRow());
+    }
+
     public static void main(String [] args) {
         System.out
         .println("Testing org.apache.poi.hssf.usermodel.TestHSSFCell");