public LayoutHelper(HexBufferLineProvider bufferLines, HexLineTransformProvider lineTransformProvider, double newViewportTop, HashSet<HexViewLine> oldVisibleLines, List<PhysicalLine> oldLines, HexFormattedLineSource formattedLineSource) {
this.bufferLines = bufferLines;
this.lineTransformProvider = lineTransformProvider;
requestedViewportTop = newViewportTop;
this.oldLines = oldLines;
this.formattedLineSource = formattedLineSource;
toPhysicalLine = new Dictionary<HexFormattedLine, PhysicalLine>();
this.oldVisibleLines = oldVisibleLines;
foreach (var physLine in oldLines) {
foreach (var line in physLine.Lines)
toPhysicalLine[line] = physLine;
}
}
static PhysicalLine CreatePhysicalLineNoCache(HexBufferLineFormatter bufferLines, HexFormattedLineSource formattedLineSource, HexBufferPoint bufferPosition) {
var bufferLine = bufferLines.GetLineFromPosition(bufferPosition);
var formattedLine = formattedLineSource.FormatLineInVisualBuffer(bufferLine);
return new PhysicalLine(new[] { formattedLine });
}
void CreateFormattedLineSource(double viewportWidthOverride) {
lastFormattedLineSourceViewportWidth = viewportWidthOverride;
bool useDisplayMode = TextOptions.GetTextFormattingMode(canvas) == TextFormattingMode.Display;
var classifier = Options.IsColorizationEnabled() ? aggregateClassifier : NullHexClassifier.Instance;
// This value is what VS uses, see: https://msdn.microsoft.com/en-us/library/microsoft.visualstudio.text.formatting.iformattedlinesource.baseindentation.aspx
// "This is generally a small value like 2.0, so that some characters (such as an italic
// slash) will not be clipped by the left edge of the view."
const double baseIndent = 2.0;
(formattedLineSource as IDisposable)?.Dispose();
formattedLineSource = formattedHexSourceFactoryService.Create(
baseIndent,
useDisplayMode,
classifier,
hexAndAdornmentSequencer,
classificationFormatMap);
}
