Theme map lookup

theme.go

@@ -4,6 +4,9 @@
 
 package termui
 
+import "strings"
+
+/*
 // A ColorScheme represents the current look-and-feel of the dashboard.
 type ColorScheme struct {
 	BodyBg            Attribute
@@ -82,3 +85,54 @@ func UseTheme(th string) {
 		theme = themeDefault
 	}
 }
+*/
+
+var ColorMap = map[string]Attribute{
+	"fg":           ColorWhite,
+	"bg":           ColorDefault,
+	"border.fg":    ColorWhite,
+	"label.fg":     ColorGreen,
+	"par.fg":       ColorYellow,
+	"par.label.bg": ColorWhite,
+}
+
+func ThemeAttr(name string) Attribute {
+	return lookUpAttr(ColorMap, name)
+}
+
+func lookUpAttr(clrmap map[string]Attribute, name string) Attribute {
+
+	a, ok := clrmap[name]
+	if ok {
+		return a
+	}
+
+	ns := strings.Split(name, ".")
+	for i := range ns {
+		nn := strings.Join(ns[i:len(ns)], ".")
+		a, ok = ColorMap[nn]
+		if ok {
+			break
+		}
+	}
+
+	return a
+}
+
+// 0<=r,g,b <= 5
+func ColorRGB(r, g, b int) Attribute {
+	within := func(n int) int {
+		if n < 0 {
+			return 0
+		}
+
+		if n > 5 {
+			return 5
+		}
+
+		return n
+	}
+
+	r, b, g = within(r), within(b), within(g)
+	return Attribute(0x0f + 36*r + 6*g + b)
+}