private static TextFormattingRunProperties Apply(
TextFormattingRunProperties formatting,
Classification classification,
TextFormattingRunProperties defaultFormatting)
{
// NOTE: avoid creating a new instance for fields that weren't changed
formatting = ApplyTypeFace(formatting, classification, defaultFormatting);
if (formatting.Bold != classification.IsBold)
{
formatting = formatting.SetBold(classification.IsBold);
}
if (classification.FontRenderingSizeWasReset)
{
/// NOTE: we should not try to set property of <param name="defaultFormatting" /> if it's marked as empty
/// to avoid set which will mark property of <param name="formatting" /> as non empty
formatting = defaultFormatting.FontRenderingEmSizeEmpty
? formatting.ClearFontRenderingEmSize()
: formatting.SetFontHintingEmSize(defaultFormatting.FontRenderingEmSize);
}
else if (Math.Abs(formatting.FontRenderingEmSize - classification.FontRenderingSize) > 0.001)
{
formatting = formatting.SetFontRenderingEmSize(classification.FontRenderingSize);
}
if (classification.BackgroundWasReset)
{
/// NOTE: we should not try to set a some of value from <param name="defaultFormatting" /> if it's marked as empty
/// to avoid set that will mark value from <param name="formatting" /> as non empty
formatting = defaultFormatting.BackgroundBrushEmpty
? formatting.ClearBackgroundBrush()
: formatting.SetBackground(defaultFormatting.BackgroundBrush.GetColor());
}
else if (!(formatting.BackgroundBrush is SolidColorBrush backgroundBrush) ||
!backgroundBrush.Color.Equals(classification.Background))
{
formatting = formatting.SetBackgroundBrush(new SolidColorBrush(classification.Background));
}
if (classification.ForegroundWasReset)
{
// NOTE: Foreground always is set, just look at
// https://docs.microsoft.com/en-us/dotnet/api/microsoft.visualstudio.text.classification.iclassificationformatmap.defaulttextproperties?view=visualstudiosdk-2017#remarks
formatting = formatting.SetForeground(defaultFormatting.ForegroundBrush.GetColor());
}
else if (!(formatting.ForegroundBrush is SolidColorBrush foregroundBrush) ||
!foregroundBrush.Color.Equals(classification.Foreground))
{
formatting = formatting.SetForegroundBrush(new SolidColorBrush(classification.Foreground));
}
formatting = ApplyDecoration(formatting, classification.IsOverline, TextDecorations.OverLine[0]);
formatting = ApplyDecoration(formatting, classification.IsUnderline, TextDecorations.Underline[0]);
formatting = ApplyDecoration(formatting, classification.IsStrikethrough, TextDecorations.Strikethrough[0]);
formatting = ApplyDecoration(formatting, classification.IsBaseline, TextDecorations.Baseline[0]);
return(formatting);
}
