made DrawingSelectionRecord into a plain BIFF record (not an escher holder aggregate). Added some interpretation of fields

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@709570 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/poi/hssf/record/DrawingSelectionRecord.java

@@ -17,25 +17,129 @@
 
 package org.apache.poi.hssf.record;
 
-public final class DrawingSelectionRecord extends AbstractEscherHolderRecord {
-    public static final short sid = 0xED;
+import org.apache.poi.util.HexDump;
+import org.apache.poi.util.LittleEndianByteArrayOutputStream;
+import org.apache.poi.util.LittleEndianInput;
+import org.apache.poi.util.LittleEndianOutput;
 
-    public DrawingSelectionRecord()
-    {
+/**
+ * MsoDrawingSelection (0x00ED)<p/>
+ * Reference:
+ * [MS-OGRAPH].pdf sec 2.4.69
+ * 
+ * @author Josh Micich
+ */
+public final class DrawingSelectionRecord extends Record {
+	public static final short sid = 0x00ED;
+
+	/**
+	 * From [MS-ODRAW].pdf sec 2.2.1<br/>
+	 * TODO - make EscherRecordHeader {@link LittleEndianInput} aware and refactor with this
+	 */
+	private static final class OfficeArtRecordHeader {
+		public static final int ENCODED_SIZE = 8;
+		/**
+		 * lower 4 bits is 'version' usually 0x01 or 0x0F (for containers)<br/>
+		 * upper 12 bits is 'instance'
+		 */
+		private final int _verAndInstance;
+		/** value should be between 0xF000 and 0xFFFF */
+		private final int _type;
+		private final int _length;
+
+		public OfficeArtRecordHeader(LittleEndianInput in) {
+			_verAndInstance = in.readUShort();
+			_type = in.readUShort();
+			_length = in.readInt();
 		}
 
-    public DrawingSelectionRecord( RecordInputStream in )
-    {
-        super( in );
+		public void serialize(LittleEndianOutput out) {
+			out.writeShort(_verAndInstance);
+			out.writeShort(_type);
+			out.writeInt(_length);
 		}
 
-    protected String getRecordName()
-    {
-        return "MSODRAWINGSELECTION";
+		public String debugFormatAsString() {
+			StringBuffer sb = new StringBuffer(32);
+			sb.append("ver+inst=").append(HexDump.shortToHex(_verAndInstance));
+			sb.append(" type=").append(HexDump.shortToHex(_type));
+			sb.append(" len=").append(HexDump.intToHex(_length));
+			return sb.toString();
+		}
 	}
 
-    public short getSid()
-    {
+	// [MS-OGRAPH].pdf says that the data of this record is an OfficeArtFDGSL structure
+	// as described in[MS-ODRAW].pdf sec 2.2.33
+	private OfficeArtRecordHeader _header;
+	private int _cpsp;
+	/** a MSODGSLK enum value for the current selection mode */
+	private int _dgslk;
+	private int _spidFocus;
+	/** selected shape IDs (e.g. from EscherSpRecord.ShapeId) */
+	private int[] _shapeIds;
+
+	public DrawingSelectionRecord(RecordInputStream in) {
+		_header = new OfficeArtRecordHeader(in);
+		_cpsp = in.readInt();
+		_dgslk = in.readInt();
+		_spidFocus = in.readInt();
+		int nShapes = in.available() / 4;
+		int[] shapeIds = new int[nShapes];
+		for (int i = 0; i < nShapes; i++) {
+			shapeIds[i] = in.readInt();
+		}
+		_shapeIds = shapeIds;
+	}
+
+	public short getSid() {
 		return sid;
 	}
+
+	protected int getDataSize() {
+		return OfficeArtRecordHeader.ENCODED_SIZE 
+			+ 12 // 3 int fields
+			+ _shapeIds.length * 4;
+	}
+
+	public int serialize(int offset, byte[] data) {
+		int dataSize = getDataSize();
+		int recSize = 4 + dataSize;
+		LittleEndianOutput out = new LittleEndianByteArrayOutputStream(data, offset, recSize);
+		out.writeShort(sid);
+		out.writeShort(dataSize);
+		_header.serialize(out);
+		out.writeInt(_cpsp);
+		out.writeInt(_dgslk);
+		out.writeInt(_spidFocus);
+		for (int i = 0; i < _shapeIds.length; i++) {
+			out.writeInt(_shapeIds[i]);
+		}
+		return recSize;
+	}
+
+	public Object clone() {
+		// currently immutable
+		return this;
+	}
+
+	public String toString() {
+		StringBuffer sb = new StringBuffer();
+
+		sb.append("[MSODRAWINGSELECTION]\n");
+		sb.append("    .rh       =(").append(_header.debugFormatAsString()).append(")\n");
+		sb.append("    .cpsp     =").append(HexDump.intToHex(_cpsp)).append('\n');
+		sb.append("    .dgslk    =").append(HexDump.intToHex(_dgslk)).append('\n');
+		sb.append("    .spidFocus=").append(HexDump.intToHex(_spidFocus)).append('\n');
+		sb.append("    .shapeIds =(");
+		for (int i = 0; i < _shapeIds.length; i++) {
+			if (i > 0) {
+				sb.append(", ");
+			}
+			sb.append(HexDump.intToHex(_shapeIds[i]));
+		}
+		sb.append(")\n");
+
+		sb.append("[/MSODRAWINGSELECTION]\n");
+		return sb.toString();
+	}
 }