✨ feat: RGBColor add new method: ToFg(), ToBg() for quick convert

Author: inhere

color_rgb.go

@@ -44,6 +44,7 @@ const (
  *************************************************************/
 
 // RGBColor definition.
+// Support RGB color on Windows CMD, PowerShell
 //
 // The first to third digits represent the color value.
 // The last digit represents the foreground(0), background(1), >1 is unset value
@@ -54,8 +55,6 @@ const (
 //	// 3rd: Fg=0, Bg=1, >1: unset value
 //	RGBColor{30,144,255, 0}
 //	RGBColor{30,144,255, 1}
-//
-// NOTICE: now support RGB color on Windows CMD, PowerShell
 type RGBColor [4]uint8
 
 // create an empty RGBColor
@@ -251,6 +250,18 @@ func (c RGBColor) String() string {
 	return ""
 }
 
+// ToBg convert to background color
+func (c RGBColor) ToBg() RGBColor {
+	c[3] = AsBg
+	return c
+}
+
+// ToFg convert to foreground color
+func (c RGBColor) ToFg() RGBColor {
+	c[3] = AsFg
+	return c
+}
+
 // IsEmpty value
 func (c RGBColor) IsEmpty() bool {
 	return c[3] > AsBg

color_rgb_test.go

@@ -26,12 +26,14 @@ func TestRGBColor(t *testing.T) {
 	is.False(c.IsEmpty())
 	is.Equal("48;2;204;204;204", c.FullCode())
 	is.Equal("48;2;204;204;204", c.String())
+	is.Equal("38;2;204;204;204", c.ToFg().FullCode())
 
 	// fg
 	c = RGB(204, 204, 204)
 	is.False(c.IsEmpty())
 	is.Equal("38;2;204;204;204", c.FullCode())
 	is.Equal("38;2;204;204;204", c.String())
+	is.Equal("48;2;204;204;204", c.ToBg().FullCode())
 
 	// RGBColor.Sprint
 	str := c.Sprint("msg")