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- /*
- * 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;
- }
- }
-
- }
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