Start on the Extended Color used in CF, but also in SheetExt

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1691856 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/poi/hssf/record/common/ExtendedColor.java

@@ -0,0 +1,111 @@
+/* ====================================================================
+   Licensed to the Apache Software Foundation (ASF) under one or more
+   contributor license agreements.  See the NOTICE file distributed with
+   this work for additional information regarding copyright ownership.
+   The ASF licenses this file to You 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 org.apache.poi.hssf.record.common;
+
+import org.apache.poi.util.HexDump;
+import org.apache.poi.util.LittleEndianInput;
+import org.apache.poi.util.LittleEndianOutput;
+
+
+/**
+ * Title: CTColor (Extended Color) record part
+ * <P>
+ * The HSSF file format normally stores Color information in the
+ *  Palette (see PaletteRecord), but for a few cases (eg Conditional
+ *  Formatting, Sheet Extensions), this XSSF-style color record 
+ *  can be used.
+ */
+public final class ExtendedColor {
+    public static final int TYPE_AUTO = 0;
+    public static final int TYPE_INDEXED = 1;
+    public static final int TYPE_RGB = 2;
+    public static final int TYPE_THEMED = 3;
+    public static final int TYPE_UNSET = 4;
+    
+    private int type; 
+    // TODO Decode
+    private byte[] value;
+    private double tint;
+    
+    public ExtendedColor() {
+        this.type = TYPE_INDEXED;
+        this.value = new byte[4];
+        this.tint = 0d;
+    }
+    public ExtendedColor(LittleEndianInput in) {
+        type = in.readInt();
+        // TODO Decode color
+        value = new byte[4];
+        in.readFully(value);
+        tint = in.readDouble();
+    }
+
+    public int getType() {
+        return type;
+    }
+    public void setType(int type) {
+        this.type = type;
+    }
+    
+    // TODO Return the color details
+    
+    /**
+     * @return Tint and Shade value, between -1 and +1
+     */
+    public double getTint() {
+        return tint;
+    }
+    /**
+     * @param tint Tint and Shade value, between -1 and +1
+     */
+    public void setTint(double tint) {
+        if (tint < -1 || tint > 1) {
+            throw new IllegalArgumentException("Tint/Shade must be between -1 and +1");
+        }
+        this.tint = tint;
+    }
+    
+    public String toString() {
+        StringBuffer buffer = new StringBuffer();
+        buffer.append("    [Extended Color]\n");
+        buffer.append("          .type  = ").append(type).append("\n");
+        buffer.append("          .tint  = ").append(tint).append("\n");
+        buffer.append("          .color = ").append(HexDump.toHex(value)).append("\n");
+        buffer.append("    [/Extended Color]\n");
+        return buffer.toString();
+    }
+    
+    public Object clone()  {
+        ExtendedColor exc = new ExtendedColor();
+        exc.type = type;
+        exc.tint = tint;
+        exc.value = new byte[value.length];
+        System.arraycopy(value, 0, exc.value, 0, value.length);
+        return exc;
+    }
+    
+    public int getDataLength() {
+        return 4+4+8;
+    }
+
+    public void serialize(LittleEndianOutput out) {
+        out.writeInt(type);
+        out.write(value);
+        out.writeDouble(tint);
+    }
+}