public static void AddImaginaryBlock(this DiffFile file, DiffInfo textInfo)
{
file.AppendDiffBlock(textInfo.BlockPosition, textInfo.TextOffset,
DiffBlockType.Imaginary);
textInfo.BlockPosition++;
textInfo.TextOffset++;
}
private void AddModifiedBlock(DiffInfo oldTextInfo, DiffFile oldFile,
DiffInfo newTextInfo, DiffFile newFile)
{
oldFile.AddDiffBlock(oldTextInfo, DiffBlockType.Modified);
newFile.AddDiffBlock(newTextInfo, DiffBlockType.Modified);
}
private static void AddBlockWithImagineryPart(DiffInfo imagineryTextInfo, DiffFile imagineryBlockFile,
DiffInfo textInfo, DiffFile file, DiffBlockType nonImagineryBlockType)
{
imagineryBlockFile.AddImaginaryBlock(imagineryTextInfo);
file.AddDiffBlock(textInfo, nonImagineryBlockType);
}
public static void AddUnchangedBlocks(this DiffFile diffFile, DiffInfo textInfo)
{
while (textInfo.BlockPosition - textInfo.TextOffset < textInfo.HighBound)
{
diffFile.AppendDiffBlock(textInfo.BlockPosition,
textInfo.TextOffset,
DiffBlockType.Unchanged);
textInfo.BlockPosition++;
}
}
private DiffResult GetChangesCore(IEnumerable <DiffItem> diffItems)
{
var oldFile = new DiffFile();
var newFile = new DiffFile();
oldFile.Lines = oldLines;
newFile.Lines = newLines;
var oldTextInfo = new DiffInfo();
var newTextInfo = new DiffInfo();
foreach (DiffItem diffItem in diffItems)
{
oldTextInfo.HighBound = diffItem.StartA;
newTextInfo.HighBound = diffItem.StartB;
oldFile.AddUnchangedBlocks(oldTextInfo);
newFile.AddUnchangedBlocks(newTextInfo);
diffItem.ProcessBlocks(
() =>
{
this.AddModifiedBlock(oldTextInfo, oldFile, newTextInfo, newFile);
},
() =>
{
AddBlockWithImagineryPart(newTextInfo, newFile, oldTextInfo, oldFile, DiffBlockType.Deleted);
},
() =>
{
AddBlockWithImagineryPart(oldTextInfo, oldFile, newTextInfo, newFile, DiffBlockType.Inserted);
});
}
oldTextInfo.HighBound = this.oldLines.Count;
newTextInfo.HighBound = this.newLines.Count;
oldFile.AddUnchangedBlocks(oldTextInfo);
newFile.AddUnchangedBlocks(newTextInfo);
return(new DiffResult(oldFile, newFile));
}
public static void AddDiffBlock(this DiffFile file, DiffInfo textInfo, DiffBlockType diffBlockType)
{
file.AppendDiffBlock(textInfo.BlockPosition, textInfo.TextOffset,
diffBlockType);
textInfo.BlockPosition++;
}
