use builtins, add joining funcs

main.go

@@ -15,10 +15,7 @@ func main() {
 	var open []string
 	var close []string
 	for _, c := range colors {
-		red := c >> 16 & 0xFF
-		green := c >> 8 & 0xFF
-		blue := c & 0xFF
-
+		red, green, blue, _ := c.RGBA()
 		if (float32(red)*0.299 + float32(green)*0.587 + float32(blue)*0.114) > 150.0 {
 			open = append(open, fmt.Sprintf("\u001B[38;2;%d;%d;%dm", 0, 0, 0))
 		} else {

simplecolor/simplecolors.go

@@ -33,6 +33,34 @@ func (n NamedPalette) ToPalette() color.Palette {
 	return color.Palette(x)
 }
 
+func (a SimplePalette) Sort() SimplePalette {
+	sort.Sort(a)
+	return a
+}
+
+func (a SimplePalette) Join(b SimplePalette) SimplePalette {
+	m := make(map[SimpleColor]SimpleColor)
+	r := SimplePalette{}
+	for _, c := range a {
+		m[c] = c
+	}
+	for _, c := range b {
+		m[c] = c
+	}
+	for _, c := range m {
+		r = append(r, c)
+	}
+	sort.Sort(r)
+	return r
+}
+
+func (s SimplePalette) Get(index int) SimpleColor {
+	if index < 0 || index > len(s) {
+		return FromHexString("#66042d")
+	}
+	return s[index]
+}
+
 func (s SimplePalette) ToPalette() color.Palette {
 	var x color.Palette
 	for _, c := range s {
@@ -68,6 +96,13 @@ func (input SimpleColor) ToExtendedAnsi() SimpleColor {
 	return SimpleColor(uint32(r)<<16 + uint32(g)<<8 + b)
 }
 
+func (p NamedPalette) ToExtendedAnsi() NamedPalette {
+	for k, v := range p {
+		p[k] = v.ToExtendedAnsi()
+	}
+	return p
+}
+
 func (p SimplePalette) ToExtendedAnsi() (sp SimplePalette) {
 	used := make(map[SimpleColor]bool)
 	for _, x := range p {