private static void MarkRange(IMarkerRender render, int start, int len, Color color)
{
var range = new TextSegment()
{
StartOffset = start,
Length = len,
};
render.DrawMarker(range, color);
}
public static void MarkDifferenceForSection(Section minusSection, Section plusSection,
IMarkerRender markerRender, ITextSource doc,
IDiffer differ)
{
var minusText = doc.GetText(minusSection.Start, minusSection.LenWithEol);
var plusText = doc.GetText(plusSection.Start, plusSection.LenWithEol).Replace("\n+", "\n-");
if (plusText.StartsWith("+"))
{
plusText = "-" + plusText.Remove(0, 1);
}
var diffsForPlusSection = differ.GetDiffs(minusText, plusText);
var pos4Minus = minusSection.Start;
var pos4Plus = plusSection.Start;
foreach (var diff in diffsForPlusSection)
{
switch (diff.operation)
{
case Operation.EQUAL:
{
pos4Minus += diff.text.Length;
pos4Plus += diff.text.Length;
break;
}
case Operation.DELETE:
{
MarkRange(markerRender, pos4Minus, diff.text.Length, MinusLineMarkerColor);
pos4Minus += diff.text.Length;
break;
}
case Operation.INSERT:
{
MarkRange(markerRender, pos4Plus, diff.text.Length, PlusLineMarkerColor);
pos4Plus += diff.text.Length;
break;
}
}
}
}
private void AddMarkerForDifferences(IMarkerRender markerRender, ITextSource textSource)
{
if (!_minusLinesSections.Any())
{
return;
}
if (!_plusLinesSections.Any())
{
return;
}
var intersections = HighlighterHelper.GetIntersections(_minusLinesSections, _plusLinesSections);
foreach (var intersection in intersections)
{
HighlighterHelper.MarkDifferenceForSection(intersection.Item1,
intersection.Item2, markerRender, textSource, Differ);
}
}
private static void HighlightSections(IEnumerable <Section> sections, Color color, IMarkerRender markerRender)
{
foreach (var section in sections)
{
var range = new TextSegment()
{
StartOffset = section.Start,
EndOffset = section.End,
Length = section.End - section.Start + 1,
};
markerRender.DrawMarker(range, color);
}
}
private void HighlightLinesBackground(IMarkerRender markerRender)
{
HighlightSections(_minusLinesSections, HighlighterHelper.MinusLineColor, markerRender);
HighlightSections(_plusLinesSections, HighlighterHelper.PlusLineColor, markerRender);
HighlightSections(_headers, HighlighterHelper.HeaderLineColor, markerRender);
}