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);
}
TextFormattingRunProperties SetProperties(TextFormattingRunProperties format, StyleBase styleOption, double textSize)
{
var settings = styleOption;
var fontSize = textSize + settings.FontSize;
if (fontSize < 1)
{
fontSize = 1;
}
if (string.IsNullOrWhiteSpace(settings.Font) == false)
{
format = format.SetTypeface(new Typeface(settings.Font));
}
if (settings.FontSize != 0)
{
if (format.FontRenderingEmSizeEmpty || fontSize != format.FontRenderingEmSize)
{
format = format.SetFontRenderingEmSize(fontSize);
}
}
if (settings.Bold.HasValue)
{
if (format.BoldEmpty || settings.Bold != format.Bold)
{
format = format.SetBold(settings.Bold.Value);
}
}
if (settings.Italic.HasValue)
{
if (format.ItalicEmpty || settings.Italic != format.Italic)
{
format = format.SetItalic(settings.Italic.Value);
}
}
if (settings.ForegroundOpacity > 0)
{
format = format.SetForegroundOpacity(settings.ForegroundOpacity / 255.0);
}
if (settings.ForeColor.A > 0)
{
if (format.ForegroundBrushEmpty || (format.ForegroundBrush as SolidColorBrush)?.Color != settings.ForeColor)
{
format = format.SetForeground(settings.ForeColor);
}
}
if (settings.BackColor.A > 0)
{
var bc = settings.BackColor.A > 0 ? settings.BackColor
: format.BackgroundBrushEmpty == false && format.BackgroundBrush is SolidColorBrush ? (format.BackgroundBrush as SolidColorBrush).Color
: Colors.Transparent;
if (settings.BackgroundOpacity != 0)
{
format = format.SetBackgroundOpacity(settings.BackgroundOpacity / 255.0);
}
if (bc.A > 0)
{
var bb = format.BackgroundBrush as LinearGradientBrush;
switch (settings.BackgroundEffect)
{
case BrushEffect.Solid:
if (format.BackgroundBrushEmpty || (format.BackgroundBrush as SolidColorBrush)?.Color != bc)
{
format = format.SetBackground(bc);
}
break;
case BrushEffect.ToBottom:
if (bb == null || bb.StartPoint.Y > bb.EndPoint.Y || bb.GradientStops.Count != 2 ||
bb.GradientStops[0].Color != _BackColor || bb.GradientStops[1].Color != bc)
{
format = format.SetBackgroundBrush(new LinearGradientBrush(_BackColor, bc, 90));
}
break;
case BrushEffect.ToTop:
if (bb == null || bb.StartPoint.Y < bb.EndPoint.Y || bb.GradientStops.Count != 2 ||
bb.GradientStops[0].Color != bc || bb.GradientStops[1].Color != _BackColor)
{
format = format.SetBackgroundBrush(new LinearGradientBrush(bc, _BackColor, 90));
}
bb = new LinearGradientBrush(bc, _BackColor, 90);
break;
case BrushEffect.ToRight:
if (bb == null || bb.StartPoint.X >= bb.EndPoint.X || bb.GradientStops.Count != 2 ||
bb.GradientStops[0].Color != _BackColor || bb.GradientStops[1].Color != bc)
{
format = format.SetBackgroundBrush(new LinearGradientBrush(_BackColor, bc, 0));
}
break;
case BrushEffect.ToLeft:
if (bb == null || bb.StartPoint.X >= bb.EndPoint.X || bb.GradientStops.Count != 2 ||
bb.GradientStops[0].Color != bc || bb.GradientStops[1].Color != _BackColor)
{
format = format.SetBackgroundBrush(new LinearGradientBrush(bc, _BackColor, 0));
}
break;
default:
throw new NotImplementedException("Background effect not supported: " + settings.BackgroundEffect.ToString());
}
}
}
else if (settings.BackColor.A > 0)
{
if (format.BackgroundBrushEmpty || (format.BackgroundBrush as SolidColorBrush)?.Color != settings.BackColor)
{
format = format.SetBackground(settings.BackColor);
}
}
if (settings.Underline.HasValue || settings.Strikethrough.HasValue || settings.OverLine.HasValue)
{
var tdc = new TextDecorationCollection();
if (settings.Underline.GetValueOrDefault())
{
tdc.Add(TextDecorations.Underline);
}
if (settings.Strikethrough.GetValueOrDefault())
{
tdc.Add(TextDecorations.Strikethrough);
}
if (settings.OverLine.GetValueOrDefault())
{
tdc.Add(TextDecorations.OverLine);
}
format = format.SetTextDecorations(tdc);
}
return(format);
}
TextFormattingRunProperties SetProperties(TextFormattingRunProperties properties, StyleBase styleOption, double textSize)
{
var settings = styleOption;
var fontSize = textSize + settings.FontSize;
if (fontSize < 1)
{
fontSize = 1;
}
if (string.IsNullOrWhiteSpace(settings.Font) == false)
{
properties = properties.SetTypeface(new Typeface(settings.Font));
}
if (settings.FontSize != 0)
{
properties = properties.SetFontRenderingEmSize(fontSize);
}
if (settings.Bold.HasValue)
{
properties = properties.SetBold(settings.Bold.Value);
}
if (settings.Italic.HasValue)
{
properties = properties.SetItalic(settings.Italic.Value);
}
if (settings.ForeColor.A > 0)
{
if (settings.ForeColor.A == 255 && properties.ForegroundOpacityEmpty)
{
properties = properties.SetForeground(settings.ForeColor.Alpha(255));
}
else
{
properties = properties.SetForegroundOpacity(settings.ForeColor.A / 255.0)
.SetForeground(settings.ForeColor);
}
}
var bc = settings.BackColor.A > 0 ? settings.BackColor
: properties.BackgroundBrushEmpty == false && properties.BackgroundBrush is SolidColorBrush ? (properties.BackgroundBrush as SolidColorBrush).Color
: Colors.Transparent;
if (bc.A > 0)
{
if (settings.BackColor.A < 255 || properties.BackgroundOpacityEmpty == false)
{
properties = properties.SetBackgroundOpacity(bc.A / 255.0);
}
switch (settings.BackgroundEffect)
{
case BrushEffect.Solid:
properties = properties.SetBackground(bc);
break;
case BrushEffect.ToBottom:
properties = properties.SetBackgroundBrush(new LinearGradientBrush(_BackColor, bc, 90));
break;
case BrushEffect.ToTop:
properties = properties.SetBackgroundBrush(new LinearGradientBrush(bc, _BackColor, 90));
break;
case BrushEffect.ToRight:
properties = properties.SetBackgroundBrush(new LinearGradientBrush(_BackColor, bc, 0));
break;
case BrushEffect.ToLeft:
properties = properties.SetBackgroundBrush(new LinearGradientBrush(bc, _BackColor, 0));
break;
default:
break;
}
}
if (settings.Underline.HasValue || settings.Strikethrough.HasValue || settings.OverLine.HasValue)
{
var tdc = new TextDecorationCollection();
if (settings.Underline.GetValueOrDefault())
{
tdc.Add(TextDecorations.Underline);
}
if (settings.Strikethrough.GetValueOrDefault())
{
tdc.Add(TextDecorations.Strikethrough);
}
if (settings.OverLine.GetValueOrDefault())
{
tdc.Add(TextDecorations.OverLine);
}
properties = properties.SetTextDecorations(tdc);
}
return(properties);
}
