Revise color configuration

src/tui/dummy.go

@@ -2,30 +2,7 @@
 
 package tui
 
-type Attr int32
-
-func HasFullscreenRenderer() bool {
-	return false
-}
-
-var DefaultBorderShape = BorderRounded
-
-func (a Attr) Merge(b Attr) Attr {
-	if b&AttrRegular > 0 {
-		// Only keep bold attribute set by the system
-		return (b &^ AttrRegular) | (a & BoldForce)
-	}
-
-	return (a &^ AttrRegular) | b
-}
-
 const (
-	AttrUndefined = Attr(0)
-	AttrRegular   = Attr(1 << 8)
-	AttrClear     = Attr(1 << 9)
-	BoldForce     = Attr(1 << 10)
-	FullBg        = Attr(1 << 11)
-
 	Bold          = Attr(1)
 	Dim           = Attr(1 << 1)
 	Italic        = Attr(1 << 2)
@@ -36,6 +13,12 @@ const (
 	StrikeThrough = Attr(1 << 7)
 )
 
+func HasFullscreenRenderer() bool {
+	return false
+}
+
+var DefaultBorderShape = BorderRounded
+
 func (r *FullscreenRenderer) Init() error                        { return nil }
 func (r *FullscreenRenderer) DefaultTheme() *ColorTheme          { return nil }
 func (r *FullscreenRenderer) Resize(maxHeightFunc func(int) int) {}