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/*
* Copyright 2000-2012 JetBrains s.r.o.
*
* Licensed 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 com.intellij.codeInsight.daemon.impl;
import com.intellij.lang.java.JavaLanguage;
import com.intellij.openapi.editor.ElementColorProvider;
import com.intellij.psi.*;
import com.intellij.psi.impl.JavaConstantExpressionEvaluator;
import com.intellij.psi.util.PsiTypesUtil;
import com.intellij.ui.ColorUtil;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.awt.*;
/**
* @author Konstantin Bulenkov
*/
public class JavaColorProvider implements ElementColorProvider {
@Override
public Color getColorFrom(@NotNull PsiElement element) {
if (element instanceof PsiNewExpression && element.getLanguage() == JavaLanguage.INSTANCE) {
final PsiNewExpression expr = (PsiNewExpression)element;
final PsiType type = expr.getType();
if (type != null) {
final PsiClass aClass = PsiTypesUtil.getPsiClass(type);
if (aClass != null) {
final String fqn = aClass.getQualifiedName();
if ("java.awt.Color".equals(fqn) || "javax.swing.plaf.ColorUIResource".equals(fqn)) {
return getColor(expr.getArgumentList());
}
}
}
}
return null;
}
@Nullable
private static Color getColor(PsiExpressionList list) {
try {
final PsiExpression[] args = list.getExpressions();
final PsiType[] types = list.getExpressionTypes();
ColorConstructors type = getConstructorType(types);
if (type != null) {
switch (type) {
case INT: return new Color( getInt(args[0]));
case INT_BOOL: return new Color( getInt(args[0]), getBoolean(args[1]));
case INT_x3: return new Color( getInt(args[0]), getInt(args[1]), getInt(args[2]));
case INT_x4: return new Color( getInt(args[0]), getInt(args[1]), getInt(args[2]), getInt(args[3]));
case FLOAT_x3: return new Color(getFloat(args[0]), getFloat(args[1]), getFloat(args[2]));
case FLOAT_x4: return new Color(getFloat(args[0]), getFloat(args[1]), getFloat(args[2]), getFloat(args[3]));
}
}
}
catch (Exception ignore) {
}
return null;
}
@Nullable
private static ColorConstructors getConstructorType(PsiType[] types) {
int len = types.length;
if (len == 0) return null;
switch (len) {
case 1: return ColorConstructors.INT;
case 2: return ColorConstructors.INT_BOOL;
case 3: return PsiType.INT.equals(types[0]) ? ColorConstructors.INT_x3 : ColorConstructors.FLOAT_x3;
case 4: return PsiType.INT.equals(types[0]) ? ColorConstructors.INT_x4 : ColorConstructors.FLOAT_x4;
}
return null;
}
public static int getInt(PsiExpression expr) {
return ((Integer)getObject(expr)).intValue();
}
public static float getFloat(PsiExpression expr) {
return ((Float)getObject(expr)).floatValue();
}
public static boolean getBoolean(PsiExpression expr) {
return ((Boolean)getObject(expr)).booleanValue();
}
private static Object getObject(PsiExpression expr) {
return JavaConstantExpressionEvaluator.computeConstantExpression(expr, true);
}
@Override
public void setColorTo(@NotNull PsiElement element, @NotNull Color color) {
PsiExpressionList argumentList = ((PsiNewExpression)element).getArgumentList();
assert argumentList != null;
PsiExpression[] expr = argumentList.getExpressions();
ColorConstructors type = getConstructorType(argumentList.getExpressionTypes());
assert type != null;
switch (type) {
case INT:
case INT_BOOL:
replaceInt(expr[0], color.getRGB(), true);
return;
case INT_x3:
case INT_x4:
replaceInt(expr[0], color.getRed());
replaceInt(expr[1], color.getGreen());
replaceInt(expr[2], color.getBlue());
if (type == ColorConstructors.INT_x4) {
replaceInt(expr[3], color.getAlpha());
} else if (color.getAlpha() != 255) {
//todo add alpha
}
return;
case FLOAT_x3:
case FLOAT_x4:
float[] rgba = color.getColorComponents(null);
replaceFloat(expr[0], rgba[0]);
replaceFloat(expr[1], rgba[1]);
replaceFloat(expr[2], rgba[2]);
if (type == ColorConstructors.FLOAT_x4) {
replaceFloat(expr[3], rgba.length == 4 ? rgba[3] : 0f);
} else if (color.getAlpha() != 255) {
//todo add alpha
}
}
}
private static void replaceInt(PsiExpression expr, int newValue) {
replaceInt(expr, newValue, false);
}
private static void replaceInt(PsiExpression expr, int newValue, boolean hex) {
PsiElementFactory factory = JavaPsiFacade.getElementFactory(expr.getProject());
if (getInt(expr) != newValue) {
String text = hex ? "0x" + ColorUtil.toHex(new Color(newValue)).toUpperCase() : Integer.toString(newValue);
expr.replace(factory.createExpressionFromText(text, null));
}
}
private static void replaceFloat(PsiExpression expr, float newValue) {
PsiElementFactory factory = JavaPsiFacade.getElementFactory(expr.getProject());
if (getFloat(expr) != newValue) {
expr.replace(factory.createExpressionFromText(String.valueOf(newValue) + "f", null));
}
}
private enum ColorConstructors {
INT, INT_BOOL, INT_x3, INT_x4, FLOAT_x3, FLOAT_x4
}
}
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