private static string FormatDiff(DiffPaneModel diff)
{
var sb = new StringBuilder();
foreach (var line in diff.Lines)
AppendLine(sb, line);
return sb.ToString();
}
public DiffPaneModel BuildDiffModel(string oldText, string newText)
{
if (oldText == null) throw new ArgumentNullException("oldText");
if (newText == null) throw new ArgumentNullException("newText");
var model = new DiffPaneModel();
var diffResult = differ.CreateLineDiffs(oldText, newText, true);
BuildDiffPieces(diffResult, model.Lines);
return model;
}
protected override async void OnViewLoaded(object view) {
base.OnViewLoaded(view);
IsLoading = true;
var diff = await GenerateDiffAsync();
NewText = diff.NewText;
OldText = diff.OldText;
IsLoading = false;
}
private FlowDocument GenerateFlowDocument(DiffPaneModel diffPaneModel)
{
var flowDocument = new FlowDocument();
var lineWidths = new List<double>();
var stringBuilder = new StringBuilder();
bool isFirstLine = true;
ChangeType? previousLineType = null;
DiffPiece previousLine = null;
foreach (var line in diffPaneModel.Lines)
{
if (line.Type != ChangeType.Modified && isFirstLine)
{
stringBuilder.Append(line.Text);
}
else if (line.Type != ChangeType.Modified && line.Type == previousLineType)
{
stringBuilder.Append(Environment.NewLine + line.Text);
}
else if (!isFirstLine && (line.Type != previousLineType || previousLineType == ChangeType.Modified))
{
Paragraph paragraph = GetParagraph(stringBuilder, previousLineType, previousLine);
flowDocument.Blocks.Add(paragraph);
stringBuilder.Clear();
if (line.Type != ChangeType.Modified)
{
stringBuilder.Append(line.Text);
}
}
isFirstLine = false;
previousLineType = line.Type;
previousLine = line;
lineWidths.Add(CalculateLineWidth(line.Text));
}
// process last line
if (previousLine != null)
{
Paragraph lastParagraph = GetParagraph(stringBuilder, previousLineType, previousLine);
flowDocument.Blocks.Add(lastParagraph);
}
flowDocument.LineStackingStrategy = LineStackingStrategy.BlockLineHeight;
flowDocument.PagePadding = _zeroThickness;
flowDocument.PageWidth = Math.Min(lineWidths.DefaultIfEmpty(0).Max(), 1000000); // Throws an ArgumentException if value is too big. I think the maximum allowed is 1 million.
return flowDocument;
}
public static string RenderDiffLines(DiffPaneModel diffModel)
{
StringBuilder result = new StringBuilder ();
foreach (var line in diffModel.Lines)
{
if (line.Type == ChangeType.Deleted)
result.AppendLine (PangoDeleteFormat + line.Text + PangoEnd);
else if (line.Type == ChangeType.Inserted)
result.AppendLine (PangoInsertFormat + line.Text + PangoEnd);
else if (line.Type == ChangeType.Unchanged)
result.AppendLine (line.Text);
else if (line.Type == ChangeType.Modified)
result.AppendLine (RenderDiffWords(line));
else if (line.Type == ChangeType.Imaginary)
{
result.AppendLine ();
logger.Debug ("Imaginary line {0}", line.Text);
}
}
return result.ToString ().TrimEnd (Environment.NewLine.ToCharArray ());
}
private void RenderDiffLines(Grid grid, TextBox textBox, DiffPaneModel diffModel)
{
ClearDiffLines(grid);
var lineNumber = 0;
foreach (var line in diffModel.Lines)
{
var fillColor = new SolidColorBrush(Colors.Transparent);
if (line.Type == ChangeType.Deleted)
fillColor = new SolidColorBrush(Color.FromArgb(255, 255, 200, 100));
else if (line.Type == ChangeType.Inserted)
fillColor = new SolidColorBrush(Color.FromArgb(255, 255, 255, 0));
else if (line.Type == ChangeType.Unchanged)
fillColor = new SolidColorBrush(Colors.White);
else if (line.Type == ChangeType.Modified)
{
if (currentFont.IsMonoSpaced)
RenderDiffWords(grid, textBox, line, lineNumber);
fillColor = new SolidColorBrush(Color.FromArgb(255, 220, 220, 255));
}
else if (line.Type == ChangeType.Imaginary)
{
fillColor = new SolidColorBrush(Color.FromArgb(255, 200, 200, 200));
AddImaginaryLine(textBox, lineNumber);
}
if (ShowVisualAids)
{
if (lineNumber % 2 == 0)
fillColor = new SolidColorBrush(Colors.Cyan);
else
{
fillColor = new SolidColorBrush(Colors.Gray);
}
}
PlaceRectangleInGrid(textBox, grid, lineNumber, fillColor, 0, null);
lineNumber++;
}
}
private void GenerateDiffPanes(DiffPaneModel leftDiff, DiffPaneModel rightDiff)
{
RenderDiffLines(leftGrid, leftBox, leftDiff);
RenderDiffLines(rightGrid, rightBox, rightDiff);
}
private void OnDiffChange(DiffPaneModel oldValue, DiffPaneModel newValue)
{
var textBlocks = newValue.Lines.Select(Format).ToList();
var paragraph = new Paragraph {
KeepTogether = true
};
paragraph.Inlines.AddRange(textBlocks.Select(t => new Span() {
Inlines = { t, new LineBreak() }
}));
var document = new FlowDocument {
FontFamily = new FontFamily("Consolas"),
FontSize = 11,
Blocks = {paragraph},
PageWidth = textBlocks.Max(block => {
block.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
return block.DesiredSize.Width;
}) + 50,
};
textBlocks.ForEach(tb => tb.Width = document.PageWidth);
viewer.Document = document;
}
private void RenderDiffLines(Grid grid, DiffPaneModel diffModel)
{
ClearDiffLines(grid);
var transparentFillColor = new SolidColorBrush(Colors.Transparent);
var deletedFillColor = new SolidColorBrush(Color.FromArgb(255, 255, 200, 100));
var insertedFillColor = new SolidColorBrush(Color.FromArgb(255, 255, 255, 0));
var unchangedFillColor = new SolidColorBrush(Colors.White);
var modifiedFillColor = new SolidColorBrush(Color.FromArgb(255, 220, 220, 255));
var imaginaryFillColor = new SolidColorBrush(Color.FromArgb(255, 200, 200, 200));
var lineNumber = 0;
foreach (var line in diffModel.Lines)
{
var fillColor = transparentFillColor;
switch (line.Type)
{
case ChangeType.Deleted:
fillColor = deletedFillColor;
break;
case ChangeType.Inserted:
fillColor = insertedFillColor;
break;
case ChangeType.Unchanged:
fillColor = unchangedFillColor;
break;
case ChangeType.Modified:
fillColor = modifiedFillColor;
break;
case ChangeType.Imaginary:
fillColor = imaginaryFillColor;
break;
}
if (line.Type != ChangeType.Unchanged)
{
PlaceRectangleInGrid(grid, lineNumber, fillColor, 0, null);
}
if (line.Type == ChangeType.Modified)
RenderDiffWords(grid, line, lineNumber);
lineNumber++;
}
}
public Different(DiffPlex.DiffBuilder.Model.DiffPaneModel diff)
{
Diff = diff;
}