Support strikethrough text style

docs/Config.md

@@ -347,6 +347,7 @@ The available attributes are:
 - default
 - reverse # useful for high-contrast
 - underline
+- strikethrough
 
 ## Highlighting the selected line
 

pkg/gui/style/decoration.go

@@ -6,6 +6,7 @@ type Decoration struct {
 	bold          bool
 	underline     bool
 	reverse       bool
+	strikethrough bool
 }
 
 func (d *Decoration) SetBold() {
@@ -20,6 +21,10 @@ func (d *Decoration) SetReverse() {
 	d.reverse = true
 }
 
+func (d *Decoration) SetStrikethrough() {
+	d.strikethrough = true
+}
+
 func (d Decoration) ToOpts() color.Opts {
 	opts := make([]color.Color, 0, 3)
 
@@ -35,6 +40,10 @@ func (d Decoration) ToOpts() color.Opts {
 		opts = append(opts, color.OpReverse)
 	}
 
+	if d.strikethrough {
+		opts = append(opts, color.OpStrikethrough)
+	}
+
 	return opts
 }
 
@@ -51,5 +60,9 @@ func (d Decoration) Merge(other Decoration) Decoration {
 		d.reverse = true
 	}
 
+	if other.strikethrough {
+		d.strikethrough = true
+	}
+
 	return d
 }

pkg/gui/style/text_style.go

@@ -98,6 +98,12 @@ func (b TextStyle) SetReverse() TextStyle {
 	return b
 }
 
+func (b TextStyle) SetStrikethrough() TextStyle {
+	b.decoration.SetStrikethrough()
+	b.Style = b.deriveStyle()
+	return b
+}
+
 func (b TextStyle) SetBg(color Color) TextStyle {
 	b.bg = &color
 	b.Style = b.deriveStyle()

pkg/theme/style.go

@@ -17,6 +17,8 @@ func GetTextStyle(keys []string, background bool) style.TextStyle {
 			s = s.SetReverse()
 		case "underline":
 			s = s.SetUnderline()
+		case "strikethrough":
+			s = s.SetStrikethrough()
 		default:
 			value, present := style.ColorMap[key]
 			if present {