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APIs that help you display diffs.

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/*
 * See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.xwiki.diff.display;

import java.util.List;

import org.xwiki.diff.Chunk;
import org.xwiki.diff.Conflict;

/**
 * This is a {@link Conflict} representation for the unified diff.
 * It represents only a part of a conflict for a {@link UnifiedDiffElement}.
 *
 * @param  the type of elements that are compared to produce the first-level diff
 * @version $Id: f02e125f87b7f32233c6c2f4a49eb35b4c1ab574 $
 * @since 11.7RC1
 */
public class UnifiedDiffConflictElement
{
    private Conflict conflict;

    /**
     * Creates a conflict element based on a given conflict and the index of the {@link UnifiedDiffElement}.
     * @param conflict the original conflict.
     */
    public UnifiedDiffConflictElement(Conflict conflict)
    {
        this.conflict = conflict;
    }

    private List getElementsFromChunk(Chunk chunk)
    {
        return chunk.getElements();
    }

    /**
     * @return the previous version of the element.
     */
    public List getPreviousElement()
    {
        Chunk previousChunk = this.conflict.getDeltaCurrent().getPrevious();
        return getElementsFromChunk(previousChunk);
    }

    /**
     * @return the next version of the element.
     */
    public List getNextElement()
    {
        Chunk nextChunk = this.conflict.getDeltaNext().getNext();
        return getElementsFromChunk(nextChunk);
    }

    /**
     * @return the current version of the element.
     */
    public List getCurrentElement()
    {
        Chunk currentChunk = this.conflict.getDeltaCurrent().getNext();
        return getElementsFromChunk(currentChunk);
    }

    /**
     * @return the conflict reference.
     */
    public String getReference()
    {
        return this.conflict.getReference();
    }
}