first commit

hrmsEjb/jxl/biff/PaletteRecord.java

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+package jxl.biff;
+
+import jxl.format.Colour;
+import jxl.format.RGB;
+import jxl.read.biff.Record;
+
+public class PaletteRecord extends WritableRecordData {
+  private RGB[] rgbColours = new RGB[56];
+  
+  private boolean dirty;
+  
+  private boolean read;
+  
+  private boolean initialized;
+  
+  private static final int numColours = 56;
+  
+  public PaletteRecord(Record t) {
+    super(t);
+    this.initialized = false;
+    this.dirty = false;
+    this.read = true;
+  }
+  
+  public PaletteRecord() {
+    super(Type.PALETTE);
+    this.initialized = true;
+    this.dirty = false;
+    this.read = false;
+    Colour[] colours = Colour.getAllColours();
+    for (int i = 0; i < colours.length; i++) {
+      Colour c = colours[i];
+      setColourRGB(c, c.getDefaultRGB().getRed(), c.getDefaultRGB().getGreen(), c.getDefaultRGB().getBlue());
+    } 
+  }
+  
+  public byte[] getData() {
+    if (this.read && !this.dirty)
+      return getRecord().getData(); 
+    byte[] data = new byte[226];
+    int pos = 0;
+    IntegerHelper.getTwoBytes(56, data, pos);
+    for (int i = 0; i < 56; i++) {
+      pos = i * 4 + 2;
+      data[pos] = (byte)this.rgbColours[i].getRed();
+      data[pos + 1] = (byte)this.rgbColours[i].getGreen();
+      data[pos + 2] = (byte)this.rgbColours[i].getBlue();
+    } 
+    return data;
+  }
+  
+  private void initialize() {
+    byte[] data = getRecord().getData();
+    int numrecords = IntegerHelper.getInt(data[0], data[1]);
+    for (int i = 0; i < numrecords; i++) {
+      int pos = i * 4 + 2;
+      int red = IntegerHelper.getInt(data[pos], (byte)0);
+      int green = IntegerHelper.getInt(data[pos + 1], (byte)0);
+      int blue = IntegerHelper.getInt(data[pos + 2], (byte)0);
+      this.rgbColours[i] = new RGB(red, green, blue);
+    } 
+    this.initialized = true;
+  }
+  
+  public boolean isDirty() {
+    return this.dirty;
+  }
+  
+  public void setColourRGB(Colour c, int r, int g, int b) {
+    int pos = c.getValue() - 8;
+    if (pos < 0 || pos >= 56)
+      return; 
+    if (!this.initialized)
+      initialize(); 
+    r = setValueRange(r, 0, 255);
+    g = setValueRange(g, 0, 255);
+    b = setValueRange(b, 0, 255);
+    this.rgbColours[pos] = new RGB(r, g, b);
+    this.dirty = true;
+  }
+  
+  public RGB getColourRGB(Colour c) {
+    int pos = c.getValue() - 8;
+    if (pos < 0 || pos >= 56)
+      return c.getDefaultRGB(); 
+    if (!this.initialized)
+      initialize(); 
+    return this.rgbColours[pos];
+  }
+  
+  private int setValueRange(int val, int min, int max) {
+    val = Math.max(val, min);
+    val = Math.min(val, max);
+    return val;
+  }
+}