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/*
* Copyright (C) 2009, Christian Halstrick <christian.halstrick@sap.com>
* Copyright (C) 2014, André de Oliveira <andre.oliveira@liferay.com>
* and other copyright owners as documented in the project's IP log.
*
* This program and the accompanying materials are made available
* under the terms of the Eclipse Distribution License v1.0 which
* accompanies this distribution, is reproduced below, and is
* available at http://www.eclipse.org/org/documents/edl-v10.php
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* - Neither the name of the Eclipse Foundation, Inc. nor the
* names of its contributors may be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.eclipse.jgit.merge;
import java.io.IOException;
import java.io.OutputStream;
import java.util.List;
import org.eclipse.jgit.diff.RawText;
import org.eclipse.jgit.merge.MergeChunk.ConflictState;
class MergeFormatterPass {
private final EolAwareOutputStream out;
private final MergeResult<RawText> res;
private final List<String> seqName;
private final String charsetName;
private final boolean threeWayMerge;
private String lastConflictingName; // is set to non-null whenever we are in
// a conflict
MergeFormatterPass(OutputStream out, MergeResult<RawText> res, List<String> seqName,
String charsetName) {
this.out = new EolAwareOutputStream(out);
this.res = res;
this.seqName = seqName;
this.charsetName = charsetName;
this.threeWayMerge = (res.getSequences().size() == 3);
}
void formatMerge() throws IOException {
boolean missingNewlineAtEnd = false;
for (MergeChunk chunk : res) {
RawText seq = res.getSequences().get(chunk.getSequenceIndex());
writeConflictMetadata(chunk);
// the lines with conflict-metadata are written. Now write the chunk
for (int i = chunk.getBegin(); i < chunk.getEnd(); i++)
writeLine(seq, i);
missingNewlineAtEnd = seq.isMissingNewlineAtEnd();
}
// one possible leftover: if the merge result ended with a conflict we
// have to close the last conflict here
if (lastConflictingName != null)
writeConflictEnd();
if (!missingNewlineAtEnd)
out.beginln();
}
private void writeConflictMetadata(MergeChunk chunk) throws IOException {
if (lastConflictingName != null
&& chunk.getConflictState() != ConflictState.NEXT_CONFLICTING_RANGE) {
// found the end of an conflict
writeConflictEnd();
}
if (chunk.getConflictState() == ConflictState.FIRST_CONFLICTING_RANGE) {
// found the start of an conflict
writeConflictStart(chunk);
} else if (chunk.getConflictState() == ConflictState.NEXT_CONFLICTING_RANGE) {
// found another conflicting chunk
writeConflictChange(chunk);
}
}
private void writeConflictEnd() throws IOException {
writeln(">>>>>>> " + lastConflictingName); //$NON-NLS-1$
lastConflictingName = null;
}
private void writeConflictStart(MergeChunk chunk) throws IOException {
lastConflictingName = seqName.get(chunk.getSequenceIndex());
writeln("<<<<<<< " + lastConflictingName); //$NON-NLS-1$
}
private void writeConflictChange(MergeChunk chunk) throws IOException {
/*
* In case of a non-three-way merge I'll add the name of the conflicting
* chunk behind the equal signs. I also append the name of the last
* conflicting chunk after the ending greater-than signs. If somebody
* knows a better notation to present non-three-way merges - feel free
* to correct here.
*/
lastConflictingName = seqName.get(chunk.getSequenceIndex());
writeln(threeWayMerge ? "=======" : "======= " //$NON-NLS-1$ //$NON-NLS-2$
+ lastConflictingName);
}
private void writeln(String s) throws IOException {
out.beginln();
out.write((s + "\n").getBytes(charsetName)); //$NON-NLS-1$
}
private void writeLine(RawText seq, int i) throws IOException {
out.beginln();
seq.writeLine(out, i);
// still BOL? It was a blank line. But writeLine won't lf, so we do.
if (out.isBeginln())
out.write('\n');
}
}
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