/// <summary>
/// Gets the side-by-side textual diffs.
/// </summary>
/// <param name="differ">The differ instance.</param>
/// <param name="oldText">The old text to diff.</param>
/// <param name="newText">The new text.</param>
/// <param name="ignoreWhiteSpace">true if ignore the white space; othewise, false.</param>
/// <param name="ignoreCase">true if case-insensitive; otherwise, false.</param>
/// <param name="lineChunker">The line chunker.</param>
/// <param name="wordChunker">The word chunker.</param>
/// <returns>The diffs result.</returns>
public static SideBySideDiffModel Diff(IDiffer differ, string oldText, string newText, bool ignoreWhiteSpace = true, bool ignoreCase = false, IChunker lineChunker = null, IChunker wordChunker = null)
{
if (oldText == null)
{
throw new ArgumentNullException(nameof(oldText));
}
if (newText == null)
{
throw new ArgumentNullException(nameof(newText));
}
if (differ == null)
{
return(Diff(oldText, newText, ignoreWhiteSpace, ignoreCase));
}
var model = new SideBySideDiffModel();
var diffResult = differ.CreateDiffs(oldText, newText, ignoreWhiteSpace, ignoreCase, lineChunker ?? LineChunker.Instance);
BuildDiffPieces(diffResult, model.OldText.Lines, model.NewText.Lines, (ot, nt, op, np, iw, ic) =>
{
var r = differ.CreateDiffs(ot, nt, iw, ic, wordChunker ?? WordChunker.Instance);
return(BuildDiffPieces(r, op, np, null, iw, ic));
}, ignoreWhiteSpace, ignoreCase);
return(model);
}
private SideBySideDiffModel BuildLineDiff(string oldText, string newText, bool ignoreWhitespace)
{
var model = new SideBySideDiffModel();
var diffResult = differ.CreateDiffs(oldText, newText, ignoreWhitespace, false, lineChunker);
BuildDiffPieces(diffResult, model.OldText.Lines, model.NewText.Lines, BuildWordDiffPieces);
return(model);
}
public DiffPaneModel BuildDiffModel(string oldText, string newText, bool ignoreWhitespace, bool ignoreCase, IChunker chunker)
{
if (oldText == null)
{
throw new ArgumentNullException(nameof(oldText));
}
if (newText == null)
{
throw new ArgumentNullException(nameof(newText));
}
var model = new DiffPaneModel();
var diffResult = differ.CreateDiffs(oldText, newText, ignoreWhitespace, ignoreCase: ignoreCase, chunker);
BuildDiffPieces(diffResult, model.Lines);
return(model);
}
/// <summary>
/// Finds the total size of diff (sum or all inserts and deletes) between old and new texts in an enumerable of text replacements.
/// </summary>
private int GetTotalDiffSize(IEnumerable <MappedTextReplacement> replacements) =>
replacements.Sum(r =>
{
var diff = _differ.CreateDiffs(r.OriginalText.ToString(), r.NewText.ToString(), true, false, _chunker);
return(diff.DiffBlocks.Any() ? diff.DiffBlocks.Select(b => b.DeleteCountA + b.InsertCountB).Sum() : 0);
});