| /* |
| * 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. |
| */ |
| |
| /* $Id$ */ |
| |
| package org.apache.fop.util; |
| |
| import java.awt.Color; |
| import java.awt.color.ColorSpace; |
| |
| import org.apache.xmlgraphics.java2d.color.ColorWithAlternatives; |
| |
| /** |
| * This class is a {@link Color} subclass adding a fallback color that FOP uses to re-serialize |
| * color specifications as textual functions. The fallback is otherwise not used in producing |
| * output formats. |
| */ |
| public class ColorWithFallback extends ColorWithAlternatives { |
| |
| private static final long serialVersionUID = 7913922854959637136L; |
| |
| private final Color fallback; |
| |
| /** |
| * Creates a new color |
| * @param cspace the color space of the primary color |
| * @param components the color components |
| * @param alpha the alpha component |
| * @param alternativeColors the array of alternative colors if applicable (may be null) |
| * @param fallback the fallback color (usually an sRGB color) |
| */ |
| public ColorWithFallback(ColorSpace cspace, float[] components, float alpha, |
| Color[] alternativeColors, Color fallback) { |
| super(cspace, components, alpha, alternativeColors); |
| this.fallback = fallback; |
| } |
| |
| /** |
| * Copy constructor adding a fallback color. |
| * @param color the color to be duplicated |
| * @param fallback the fallback color (usually an sRGB color) |
| */ |
| public ColorWithFallback(Color color, Color fallback) { |
| this(color.getColorSpace(), color.getColorComponents(null), |
| getAlphaFloat(color), getAlternativeColors(color), fallback); |
| } |
| |
| private static float getAlphaFloat(Color color) { |
| float[] comps = color.getComponents(null); |
| return comps[comps.length - 1]; //Alpha is on last component |
| } |
| |
| private static Color[] getAlternativeColors(Color color) { |
| if (color instanceof ColorWithAlternatives) { |
| ColorWithAlternatives cwa = (ColorWithAlternatives)color; |
| if (cwa.hasAlternativeColors()) { |
| return cwa.getAlternativeColors(); |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * Returns the fallback color. |
| * @return the fallback color |
| */ |
| public Color getFallbackColor() { |
| return this.fallback; |
| } |
| |
| @Override |
| public int hashCode() { |
| return super.hashCode() ^ fallback.hashCode(); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (obj == this) { |
| return true; |
| } else if (!super.equals(obj)) { |
| return false; |
| } else if (obj instanceof ColorWithFallback) { |
| ColorWithFallback other = (ColorWithFallback) obj; |
| return other.fallback.equals(fallback); |
| } else { |
| return false; |
| } |
| } |
| |
| } |