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Colors satisfy the Go color interface

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This commit is contained in:
Christian Rocha 2021-03-30 22:28:54 -04:00
parent 9b77d4607b
commit 5eabaaea37
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GPG Key ID: D6CC7A16E5878018
1 changed files with 27 additions and 8 deletions
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35
color.go
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@ -10,10 +10,12 @@ var (
hasDarkBackground bool = termenv.HasDarkBackground()
)
// TerminalColor is a color intended to be rendered in the terminal.
// TerminalColor is a color intended to be rendered in the terminal. It
// satisfies the Go color.Color interface.
type TerminalColor interface {
value() string
color() termenv.Color
RGBA() (r, g, b, a uint32)
}
// NoColor is used to specify the absence of color styling. When this is active
@ -34,6 +36,13 @@ func (n NoColor) color() termenv.Color {
return color("")
}
// RGBA returns the RGBA value of this color. Because we have to return
// something, despite this color being the absence of color, we're returning
// defaults for all values.
func (n NoColor) RGBA() (r, g, b, a uint32) {
return 0, 0, 0, 0
}
var noColor = NoColor{}
// Color specifies a color by hex or ANSI value. For example:
@ -51,9 +60,14 @@ func (c Color) color() termenv.Color {
return color(string(c))
}
// RGBA returns the RGBA value of this color.
func (c Color) RGBA() (r, g, b, a uint32) {
return c.RGBA()
}
// AdaptiveColor provides color options for light and dark backgrounds. The
// appropriate color with be returned based on the darkness of the terminal
// background color determined at runtime.
// appropriate color with be returned at runtime based on the darkness of the
// terminal background color.
//
// Example usage:
//
@ -64,13 +78,18 @@ type AdaptiveColor struct {
Dark string
}
func (a AdaptiveColor) value() string {
func (ac AdaptiveColor) value() string {
if hasDarkBackground {
return a.Dark
return ac.Dark
}
return a.Light
return ac.Light
}
func (a AdaptiveColor) color() termenv.Color {
return color(a.value())
func (ac AdaptiveColor) color() termenv.Color {
return color(ac.value())
}
// RGBA returns the RGBA value of this color.
func (ac AdaptiveColor) RGBA() (r, g, b, a uint32) {
return ac.RGBA()
}