images/src/org/intellij/images/options/impl/TransparencyChessboardOptionsImpl.java

/*
 * Copyright 2004-2005 Alexey Efimov
 *
 * 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 org.intellij.images.options.impl;

import com.intellij.openapi.util.JDOMExternalizable;
import com.intellij.openapi.util.JDOMExternalizer;
import org.intellij.images.options.TransparencyChessboardOptions;
import org.jdom.Element;

import java.awt.*;
import java.beans.PropertyChangeSupport;

/**
 * Background options implementation.
 *
 * @author <a href="mailto:aefimov.box@gmail.com">Alexey Efimov</a>
 */
final class TransparencyChessboardOptionsImpl implements TransparencyChessboardOptions, JDOMExternalizable {
    private boolean showDefault = true;
    private int cellSize = DEFAULT_CELL_SIZE;
    private Color whiteColor = DEFAULT_WHITE_COLOR;
    private Color blackColor = DEFAULT_BLACK_COLOR;
    private final PropertyChangeSupport propertyChangeSupport;

    TransparencyChessboardOptionsImpl(PropertyChangeSupport propertyChangeSupport) {
        this.propertyChangeSupport = propertyChangeSupport;
    }

    public boolean isShowDefault() {
        return showDefault;
    }

    public int getCellSize() {
        return cellSize;
    }

    public Color getWhiteColor() {
        return whiteColor;
    }

    public Color getBlackColor() {
        return blackColor;
    }

    void setShowDefault(boolean showDefault) {
        boolean oldValue = this.showDefault;
        if (oldValue != showDefault) {
            this.showDefault = showDefault;
            propertyChangeSupport.firePropertyChange(ATTR_SHOW_DEFAULT, oldValue, this.showDefault);
        }
    }

    void setCellSize(int cellSize) {
        int oldValue = this.cellSize;
        if (oldValue != cellSize) {
            this.cellSize = cellSize;
            propertyChangeSupport.firePropertyChange(ATTR_CELL_SIZE, oldValue, this.cellSize);
        }
    }

    void setWhiteColor(Color whiteColor) {
        Color oldValue = this.whiteColor;
        if (whiteColor == null) {
            this.whiteColor = DEFAULT_WHITE_COLOR;
        }
        if (!oldValue.equals(whiteColor)) {
            this.whiteColor = whiteColor;
            propertyChangeSupport.firePropertyChange(ATTR_WHITE_COLOR, oldValue, this.whiteColor);
        }
    }

    void setBlackColor(Color blackColor) {
        Color oldValue = this.blackColor;
        if (blackColor == null) {
            blackColor = DEFAULT_BLACK_COLOR;
        }
        if (!oldValue.equals(blackColor)) {
            this.blackColor = blackColor;
            propertyChangeSupport.firePropertyChange(ATTR_BLACK_COLOR, oldValue, this.blackColor);
        }
    }

    public void inject(TransparencyChessboardOptions options) {
        setShowDefault(options.isShowDefault());
        setCellSize(options.getCellSize());
        setWhiteColor(options.getWhiteColor());
        setBlackColor(options.getBlackColor());
    }

    public boolean setOption(String name, Object value) {
        if (ATTR_SHOW_DEFAULT.equals(name)) {
            setShowDefault((Boolean)value);
        } else if (ATTR_CELL_SIZE.equals(name)) {
            setCellSize((Integer)value);
        } else if (ATTR_WHITE_COLOR.equals(name)) {
            setWhiteColor((Color)value);
        } else if (ATTR_BLACK_COLOR.equals(name)) {
            setBlackColor((Color)value);
        } else {
            return false;
        }
        return true;
    }

    public void readExternal(Element element) {
        setShowDefault(JDOMExternalizer.readBoolean(element, ATTR_SHOW_DEFAULT));
        setCellSize(JDOMExternalizer.readInteger(element, ATTR_CELL_SIZE, DEFAULT_CELL_SIZE));
        setWhiteColor(JDOMExternalizerEx.readColor(element, ATTR_WHITE_COLOR, DEFAULT_WHITE_COLOR));
        setBlackColor(JDOMExternalizerEx.readColor(element, ATTR_BLACK_COLOR, DEFAULT_BLACK_COLOR));
    }

    public void writeExternal(Element element) {
        JDOMExternalizer.write(element, ATTR_SHOW_DEFAULT, showDefault);
        JDOMExternalizer.write(element, ATTR_CELL_SIZE, cellSize);
        JDOMExternalizerEx.write(element, ATTR_WHITE_COLOR, whiteColor);
        JDOMExternalizerEx.write(element, ATTR_BLACK_COLOR, blackColor);
    }

    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (!(o instanceof TransparencyChessboardOptions)) {
            return false;
        }

        TransparencyChessboardOptions otherOptions = (TransparencyChessboardOptions)o;

        return cellSize == otherOptions.getCellSize() &&
            showDefault == otherOptions.isShowDefault() &&
            (blackColor != null ?
                blackColor.equals(otherOptions.getBlackColor()) :
                otherOptions.getBlackColor() == null) &&
            (whiteColor != null ?
                whiteColor.equals(otherOptions.getWhiteColor()) :
                otherOptions.getWhiteColor() == null);

    }

    public int hashCode() {
        int result;
        result = (showDefault ? 1 : 0);
        result = 29 * result + cellSize;
        result = 29 * result + (whiteColor != null ? whiteColor.hashCode() : 0);
        result = 29 * result + (blackColor != null ? blackColor.hashCode() : 0);
        return result;
    }
}