http://xmlgraphics.apache.org/fop/: Apache FOP (Formatting Objects Processor) is the world's first print formatter driven by XSL formatting objects (XSL-FO) and the world's first output independent formatter. It is a Java application that reads a formatting object (FO) tree and renders the resulting pages to a specified output. Output formats currently supported include PDF, PCL, PS, AFP, TIFF, PNG, SVG, XML (area tree representation), Print, AWT and TXT. The primary output target is PDF. (Apache Software Foundation) 
/*
 * 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: CollapsingBorderModelEyeCatching.java 679326 2008-07-24 09:35:34Z vhennebert $ */

package org.apache.fop.layoutmgr.table;

import org.apache.fop.fo.Constants;
import org.apache.fop.fo.flow.table.BorderSpecification;
import org.apache.fop.fo.properties.CommonBorderPaddingBackground;
import org.apache.fop.fo.properties.CommonBorderPaddingBackground.BorderInfo;


Implements the normal "collapse" border model defined in 6.7.10 in XSL 1.0.
TODO Column groups are not yet checked in this algorithm!

/**
 * Implements the normal "collapse" border model defined in 6.7.10 in XSL 1.0.
 *
 * TODO Column groups are not yet checked in this algorithm!
 */
public class CollapsingBorderModelEyeCatching extends CollapsingBorderModel {

    
{@inheritDoc} 
/** {@inheritDoc} */
    public BorderSpecification determineWinner(BorderSpecification border1,
            BorderSpecification border2, boolean discard) {
        BorderInfo bi1 = border1.getBorderInfo();
        BorderInfo bi2 = border2.getBorderInfo();
        if (discard) {
            if (bi1.getWidth().isDiscard()) {
                if (bi2.getWidth().isDiscard()) {
                    return new BorderSpecification(
                            CommonBorderPaddingBackground.getDefaultBorderInfo(), 0/*TODO*/);
                } else {
                    return border2;
                }
            } else if (bi2.getWidth().isDiscard()) {
                return border1;
            }
        }
        // Otherwise, fall back to the default resolution algorithm
        return determineWinner(border1, border2);
    }

    
{@inheritDoc} 
/** {@inheritDoc} */
    public BorderSpecification determineWinner(BorderSpecification border1,
            BorderSpecification border2) {
        BorderInfo bi1 = border1.getBorderInfo();
        BorderInfo bi2 = border2.getBorderInfo();
        // Rule 1
        if (bi1.getStyle() == Constants.EN_HIDDEN) {
            return border1;
        } else if (bi2.getStyle() == Constants.EN_HIDDEN) {
            return border2;
        }
        // Rule 2
        if (bi2.getStyle() == Constants.EN_NONE) {
            return border1;
        } else if (bi1.getStyle() == Constants.EN_NONE) {
            return border2;
        }
        // Rule 3
        int width1 = bi1.getRetainedWidth();
        int width2 = bi2.getRetainedWidth();
        if (width1 > width2) {
            return border1;
        } else if (width1 == width2) {
            int cmp = compareStyles(bi1.getStyle(), bi2.getStyle());
            if (cmp > 0) {
                return border1;
            } else if (cmp < 0) {
                return border2;
            }
        } else {
            return border2;
        }
        // Rule 4
        int cmp = compareFOs(border1.getHolder(), border2.getHolder());
        if (cmp > 0) {
            return border1;
        } else if (cmp < 0) {
            return border2;
        }
        return null;
    }
}