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// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
using System;
using System.IO;
using System.Collections;
namespace WixToolset.Dtf.Tools.DDiff
{
public class DirectoryDiffEngine : IDiffEngine
{
public DirectoryDiffEngine()
{
}
public virtual float GetDiffQuality(string diffInput1, string diffInput2, string[] options, IDiffEngineFactory diffFactory)
{
if(diffInput1 != null && Directory.Exists(diffInput1) &&
diffInput2 != null && Directory.Exists(diffInput2))
{
return .70f;
}
else
{
return 0;
}
}
public bool GetDiff(string diffInput1, string diffInput2, string[] options, TextWriter diffOutput, string linePrefix, IDiffEngineFactory diffFactory)
{
bool difference = false;
IComparer caseInsComp = CaseInsensitiveComparer.Default;
string[] files1 = Directory.GetFiles(diffInput1);
string[] files2 = Directory.GetFiles(diffInput2);
for(int i1 = 0; i1 < files1.Length; i1++)
{
files1[i1] = Path.GetFileName(files1[i1]);
}
for(int i2 = 0; i2 < files2.Length; i2++)
{
files2[i2] = Path.GetFileName(files2[i2]);
}
Array.Sort(files1, caseInsComp);
Array.Sort(files2, caseInsComp);
for(int i1 = 0, i2 = 0; i1 < files1.Length || i2 < files2.Length; )
{
int comp;
if(i1 == files1.Length)
{
comp = 1;
}
else if(i2 == files2.Length)
{
comp = -1;
}
else
{
comp = caseInsComp.Compare(files1[i1], files2[i2]);
}
if(comp < 0)
{
diffOutput.WriteLine("{0}< {1}", linePrefix, files1[i1]);
i1++;
difference = true;
}
else if(comp > 0)
{
diffOutput.WriteLine("{0}> {1}", linePrefix, files2[i2]);
i2++;
difference = true;
}
else
{
string file1 = Path.Combine(diffInput1, files1[i1]);
string file2 = Path.Combine(diffInput2, files2[i2]);
IDiffEngine diffEngine = diffFactory.GetDiffEngine(file1, file2, options);
StringWriter sw = new StringWriter();
if(diffEngine.GetDiff(file1, file2, options, sw, linePrefix + " ", diffFactory))
{
diffOutput.WriteLine("{0}{1}", linePrefix, files1[i1]);
diffOutput.Write(sw.ToString());
difference = true;
}
i1++;
i2++;
}
}
string[] dirs1 = Directory.GetDirectories(diffInput1);
string[] dirs2 = Directory.GetDirectories(diffInput2);
for(int i1 = 0; i1 < dirs1.Length; i1++)
{
dirs1[i1] = Path.GetFileName(dirs1[i1]);
}
for(int i2 = 0; i2 < dirs2.Length; i2++)
{
dirs2[i2] = Path.GetFileName(dirs2[i2]);
}
Array.Sort(dirs1, caseInsComp);
Array.Sort(dirs2, caseInsComp);
for(int i1 = 0, i2 = 0; i1 < dirs1.Length || i2 < dirs2.Length; )
{
int comp;
if(i1 == dirs1.Length)
{
comp = 1;
}
else if(i2 == dirs2.Length)
{
comp = -1;
}
else
{
comp = caseInsComp.Compare(dirs1[i1], dirs2[i2]);
}
if(comp < 0)
{
diffOutput.WriteLine("{0}< {1}", linePrefix, dirs1[i1]);
i1++;
difference = true;
}
else if(comp > 0)
{
diffOutput.WriteLine("{0}> {1}", linePrefix, dirs2[i2]);
i2++;
difference = true;
}
else
{
string dir1 = Path.Combine(diffInput1, dirs1[i1]);
string dir2 = Path.Combine(diffInput2, dirs2[i2]);
IDiffEngine diffEngine = diffFactory.GetDiffEngine(dir1, dir2, options);
StringWriter sw = new StringWriter();
if(diffEngine.GetDiff(dir1, dir2, options, sw, linePrefix + " ", diffFactory))
{
diffOutput.WriteLine("{0}{1}\\", linePrefix, dirs1[i1]);
diffOutput.Write(sw.ToString());
difference = true;
}
i1++;
i2++;
}
}
return difference;
}
public virtual IDiffEngine Clone()
{
return new DirectoryDiffEngine();
}
}
}
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