| /* ==================================================================== |
| 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.cf; |
| |
| import org.apache.poi.hssf.record.common.ExtendedColor; |
| import org.apache.poi.util.BitField; |
| import org.apache.poi.util.BitFieldFactory; |
| import org.apache.poi.util.LittleEndianInput; |
| import org.apache.poi.util.LittleEndianOutput; |
| import org.apache.poi.util.POILogFactory; |
| import org.apache.poi.util.POILogger; |
| |
| /** |
| * Color Gradient / Color Scale Conditional Formatting Rule Record. |
| * (Called Color Gradient in the file format docs, but more commonly |
| * Color Scale in the UI) |
| */ |
| public final class ColorGradientFormatting implements Cloneable { |
| private static POILogger log = POILogFactory.getLogger(ColorGradientFormatting.class); |
| |
| private byte options = 0; |
| private ColorGradientThreshold[] thresholds; |
| private ExtendedColor[] colors; |
| |
| private static BitField clamp = BitFieldFactory.getInstance(0x01); |
| private static BitField background = BitFieldFactory.getInstance(0x02); |
| |
| public ColorGradientFormatting() { |
| options = 3; |
| thresholds = new ColorGradientThreshold[3]; |
| colors = new ExtendedColor[3]; |
| } |
| public ColorGradientFormatting(LittleEndianInput in) { |
| in.readShort(); // Ignored |
| in.readByte(); // Reserved |
| int numI = in.readByte(); |
| int numG = in.readByte(); |
| if (numI != numG) { |
| log.log(POILogger.WARN, "Inconsistent Color Gradient defintion, found " + numI + " vs " + numG + " entries"); |
| } |
| options = in.readByte(); |
| |
| thresholds = new ColorGradientThreshold[numI]; |
| for (int i=0; i<thresholds.length; i++) { |
| thresholds[i] = new ColorGradientThreshold(in); |
| } |
| colors = new ExtendedColor[numG]; |
| for (int i=0; i<colors.length; i++) { |
| in.readDouble(); // Slightly pointless step counter |
| colors[i] = new ExtendedColor(in); |
| } |
| } |
| |
| public int getNumControlPoints() { |
| return thresholds.length; |
| } |
| public void setNumControlPoints(int num) { |
| if (num != thresholds.length) { |
| ColorGradientThreshold[] nt = new ColorGradientThreshold[num]; |
| ExtendedColor[] nc = new ExtendedColor[num]; |
| |
| int copy = Math.min(thresholds.length, num); |
| System.arraycopy(thresholds, 0, nt, 0, copy); |
| System.arraycopy(colors, 0, nc, 0, copy); |
| |
| this.thresholds = nt; |
| this.colors = nc; |
| |
| updateThresholdPositions(); |
| } |
| } |
| |
| public ColorGradientThreshold[] getThresholds() { |
| return thresholds; |
| } |
| public void setThresholds(ColorGradientThreshold[] thresholds) { |
| this.thresholds = (thresholds == null) ? null : thresholds.clone(); |
| updateThresholdPositions(); |
| } |
| |
| public ExtendedColor[] getColors() { |
| return colors; |
| } |
| public void setColors(ExtendedColor[] colors) { |
| this.colors = (colors == null) ? null : colors.clone(); |
| } |
| |
| public boolean isClampToCurve() { |
| return getOptionFlag(clamp); |
| } |
| public boolean isAppliesToBackground() { |
| return getOptionFlag(background); |
| } |
| private boolean getOptionFlag(BitField field) { |
| int value = field.getValue(options); |
| return value==0 ? false : true; |
| } |
| |
| private void updateThresholdPositions() { |
| double step = 1d / (thresholds.length-1); |
| for (int i=0; i<thresholds.length; i++) { |
| thresholds[i].setPosition(step*i); |
| } |
| } |
| |
| public String toString() { |
| StringBuffer buffer = new StringBuffer(); |
| buffer.append(" [Color Gradient Formatting]\n"); |
| buffer.append(" .clamp = ").append(isClampToCurve()).append("\n"); |
| buffer.append(" .background= ").append(isAppliesToBackground()).append("\n"); |
| for (Threshold t : thresholds) { |
| buffer.append(t.toString()); |
| } |
| for (ExtendedColor c : colors) { |
| buffer.append(c.toString()); |
| } |
| buffer.append(" [/Color Gradient Formatting]\n"); |
| return buffer.toString(); |
| } |
| |
| public Object clone() { |
| ColorGradientFormatting rec = new ColorGradientFormatting(); |
| rec.options = options; |
| rec.thresholds = new ColorGradientThreshold[thresholds.length]; |
| rec.colors = new ExtendedColor[colors.length]; |
| System.arraycopy(thresholds, 0, rec.thresholds, 0, thresholds.length); |
| System.arraycopy(colors, 0, rec.colors, 0, colors.length); |
| return rec; |
| } |
| |
| public int getDataLength() { |
| int len = 6; |
| for (Threshold t : thresholds) { |
| len += t.getDataLength(); |
| } |
| for (ExtendedColor c : colors) { |
| len += c.getDataLength(); |
| len += 8; |
| } |
| return len; |
| } |
| |
| public void serialize(LittleEndianOutput out) { |
| out.writeShort(0); |
| out.writeByte(0); |
| out.writeByte(thresholds.length); |
| out.writeByte(thresholds.length); |
| out.writeByte(options); |
| |
| for (ColorGradientThreshold t : thresholds) { |
| t.serialize(out); |
| } |
| |
| double step = 1d / (colors.length-1); |
| for (int i=0; i<colors.length; i++) { |
| out.writeDouble(i*step); |
| |
| ExtendedColor c = colors[i]; |
| c.serialize(out); |
| } |
| } |
| } |