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package ansi
import (
"fmt"
"image/color"
"github.com/lucasb-eyer/go-colorful"
)
// HexColor is a [color.Color] that can be formatted as a hex string.
type HexColor string
// RGBA returns the RGBA values of the color.
func (h HexColor) RGBA() (r, g, b, a uint32) {
hex := h.color()
if hex == nil {
return 0, 0, 0, 0
}
return hex.RGBA()
}
// Hex returns the hex representation of the color. If the color is invalid, it
// returns an empty string.
func (h HexColor) Hex() string {
hex := h.color()
if hex == nil {
return ""
}
return hex.Hex()
}
// String returns the color as a hex string. If the color is nil, an empty
// string is returned.
func (h HexColor) String() string {
return h.Hex()
}
// color returns the underlying color of the HexColor.
func (h HexColor) color() *colorful.Color {
hex, err := colorful.Hex(string(h))
if err != nil {
return nil
}
return &hex
}
// XRGBColor is a [color.Color] that can be formatted as an XParseColor
// rgb: string.
//
// See: https://linux.die.net/man/3/xparsecolor
type XRGBColor struct {
color.Color
}
// RGBA returns the RGBA values of the color.
func (x XRGBColor) RGBA() (r, g, b, a uint32) {
if x.Color == nil {
return 0, 0, 0, 0
}
return x.Color.RGBA()
}
// String returns the color as an XParseColor rgb: string. If the color is nil,
// an empty string is returned.
func (x XRGBColor) String() string {
if x.Color == nil {
return ""
}
r, g, b, _ := x.Color.RGBA()
// Get the lower 8 bits
return fmt.Sprintf("rgb:%04x/%04x/%04x", r, g, b)
}
// XRGBAColor is a [color.Color] that can be formatted as an XParseColor
// rgba: string.
//
// See: https://linux.die.net/man/3/xparsecolor
type XRGBAColor struct {
color.Color
}
// RGBA returns the RGBA values of the color.
func (x XRGBAColor) RGBA() (r, g, b, a uint32) {
if x.Color == nil {
return 0, 0, 0, 0
}
return x.Color.RGBA()
}
// String returns the color as an XParseColor rgba: string. If the color is nil,
// an empty string is returned.
func (x XRGBAColor) String() string {
if x.Color == nil {
return ""
}
r, g, b, a := x.RGBA()
// Get the lower 8 bits
return fmt.Sprintf("rgba:%04x/%04x/%04x/%04x", r, g, b, a)
}
// SetForegroundColor returns a sequence that sets the default terminal
// foreground color.
//
// OSC 10 ; color ST
// OSC 10 ; color BEL
//
// Where color is the encoded color number. Most terminals support hex,
// XParseColor rgb: and rgba: strings. You could use [HexColor], [XRGBColor],
// or [XRGBAColor] to format the color.
//
// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-Operating-System-Commands
func SetForegroundColor(s string) string {
return "\x1b]10;" + s + "\x07"
}
// RequestForegroundColor is a sequence that requests the current default
// terminal foreground color.
//
// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-Operating-System-Commands
const RequestForegroundColor = "\x1b]10;?\x07"
// ResetForegroundColor is a sequence that resets the default terminal
// foreground color.
//
// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-Operating-System-Commands
const ResetForegroundColor = "\x1b]110\x07"
// SetBackgroundColor returns a sequence that sets the default terminal
// background color.
//
// OSC 11 ; color ST
// OSC 11 ; color BEL
//
// Where color is the encoded color number. Most terminals support hex,
// XParseColor rgb: and rgba: strings. You could use [HexColor], [XRGBColor],
// or [XRGBAColor] to format the color.
//
// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-Operating-System-Commands
func SetBackgroundColor(s string) string {
return "\x1b]11;" + s + "\x07"
}
// RequestBackgroundColor is a sequence that requests the current default
// terminal background color.
//
// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-Operating-System-Commands
const RequestBackgroundColor = "\x1b]11;?\x07"
// ResetBackgroundColor is a sequence that resets the default terminal
// background color.
//
// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-Operating-System-Commands
const ResetBackgroundColor = "\x1b]111\x07"
// SetCursorColor returns a sequence that sets the terminal cursor color.
//
// OSC 12 ; color ST
// OSC 12 ; color BEL
//
// Where color is the encoded color number. Most terminals support hex,
// XParseColor rgb: and rgba: strings. You could use [HexColor], [XRGBColor],
// or [XRGBAColor] to format the color.
//
// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-Operating-System-Commands
func SetCursorColor(s string) string {
return "\x1b]12;" + s + "\x07"
}
// RequestCursorColor is a sequence that requests the current terminal cursor
// color.
//
// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-Operating-System-Commands
const RequestCursorColor = "\x1b]12;?\x07"
// ResetCursorColor is a sequence that resets the terminal cursor color.
//
// See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-Operating-System-Commands
const ResetCursorColor = "\x1b]112\x07"
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