internal static FontStyle GetFontStyle(this SyntaxHighlight.StyleBase activeStyle)
{
var f = FontStyle.Regular;
if (activeStyle.Bold == true)
{
f |= FontStyle.Bold;
}
if (activeStyle.Italic == true)
{
f |= FontStyle.Italic;
}
if (activeStyle.Underline == true)
{
f |= FontStyle.Underline;
}
if (activeStyle.Strikethrough == true)
{
f |= FontStyle.Strikeout;
}
return(f);
}
internal static void MixStyle(SyntaxHighlight.StyleBase style, out FontStyle fontStyle, out GdiColor forecolor, out GdiColor backcolor)
{
forecolor = style.ForegroundOpacity > 0 ? ThemeHelper.DocumentTextColor.Alpha(style.ForegroundOpacity) : ThemeHelper.DocumentTextColor;
backcolor = style.BackgroundOpacity > 0 ? ThemeHelper.DocumentPageColor.Alpha(style.BackgroundOpacity) : ThemeHelper.DocumentPageColor;
fontStyle = style.GetFontStyle();
if (style.ClassificationType == null)
{
return;
}
var p = TextEditorHelper.DefaultClassificationFormatMap.GetRunProperties(style.ClassificationType);
if (p == null)
{
return;
}
SolidColorBrush colorBrush;
if (style.ForeColor.A == 0)
{
colorBrush = p.ForegroundBrushEmpty ? null : p.ForegroundBrush as SolidColorBrush;
if (colorBrush != null)
{
forecolor = (style.ForegroundOpacity > 0 ? colorBrush.Color.Alpha(style.ForegroundOpacity) : colorBrush.Color).ToGdiColor();
}
}
else
{
forecolor = style.AlphaForeColor.ToGdiColor();
}
if (style.BackColor.A == 0)
{
colorBrush = p.BackgroundBrushEmpty ? null : p.BackgroundBrush as SolidColorBrush;
if (colorBrush != null)
{
backcolor = (style.BackgroundOpacity > 0 ? colorBrush.Color.Alpha(style.BackgroundOpacity) : colorBrush.Color).ToGdiColor();
}
}
else
{
backcolor = style.AlphaBackColor.ToGdiColor();
}
if (p.BoldEmpty == false && p.Bold && style.Bold != false)
{
fontStyle |= FontStyle.Bold;
}
if (p.ItalicEmpty == false && p.Italic && style.Italic != false)
{
fontStyle |= FontStyle.Italic;
}
if (p.TextDecorationsEmpty == false)
{
foreach (var decoration in p.TextDecorations)
{
if (decoration.Location == System.Windows.TextDecorationLocation.Underline && style.Underline != false)
{
fontStyle |= FontStyle.Underline;
}
else if (decoration.Location == System.Windows.TextDecorationLocation.Strikethrough && style.Strikethrough != false)
{
fontStyle |= FontStyle.Strikeout;
}
}
}
}
TextFormattingRunProperties UpdateFormattingMap(StyleBase style, TextFormattingRunProperties textFormatting, double defaultSize)
{
var p = SetProperties(textFormatting, style, defaultSize);
return(textFormatting != p ? p : null);
}
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);
}