Added terminal detection

Benchmarks_test.go

@@ -1,7 +1,6 @@
 package color_test
 
 import (
-	"io"
 	"testing"
 
 	"git.akyoto.dev/go/color"
@@ -19,24 +18,6 @@ func BenchmarkLCH(b *testing.B) {
 	}
 }
 
-func BenchmarkFprint(b *testing.B) {
-	color.Terminal = true
-	c := color.RGB(1.0, 1.0, 1.0)
-
-	for i := 0; i < b.N; i++ {
-		c.Fprint(io.Discard, "")
-	}
-}
-
-func BenchmarkFprintRaw(b *testing.B) {
-	color.Terminal = false
-	c := color.RGB(1.0, 1.0, 1.0)
-
-	for i := 0; i < b.N; i++ {
-		c.Fprint(io.Discard, "")
-	}
-}
-
 func BenchmarkPrint(b *testing.B) {
 	color.Terminal = true
 	c := color.RGB(1.0, 1.0, 1.0)

Color.go

@@ -2,7 +2,6 @@ package color
 
 import (
 	"fmt"
-	"io"
 )
 
 // Value is a type definition for the data type of a single color component.
@@ -20,16 +19,6 @@ func RGB(r Value, g Value, b Value) Color {
 	return Color{r, g, b}
 }
 
-// Fprint writes the text in the given color to the writer.
-func (c Color) Fprint(writer io.Writer, args ...any) {
-	if !Terminal {
-		fmt.Fprint(writer, args...)
-		return
-	}
-
-	fmt.Fprintf(writer, "\x1b[38;2;%d;%d;%dm%s\x1b[0m", byte(c.R*255), byte(c.G*255), byte(c.B*255), fmt.Sprint(args...))
-}
-
 // Print writes the text in the given color to standard output.
 func (c Color) Print(args ...any) {
 	if !Terminal {

Color_test.go

@@ -1,27 +1,12 @@
 package color_test
 
 import (
-	"io"
 	"testing"
 
 	"git.akyoto.dev/go/assert"
 	"git.akyoto.dev/go/color"
 )
 
-func TestFprint(t *testing.T) {
-	color.Terminal = true
-
-	color.RGB(1, 0, 0).Fprint(io.Discard, "red")
-	color.RGB(0, 1, 0).Fprint(io.Discard, "green")
-	color.RGB(0, 0, 1).Fprint(io.Discard, "blue")
-
-	color.Terminal = false
-
-	color.RGB(1, 0, 0).Fprint(io.Discard, "red")
-	color.RGB(0, 1, 0).Fprint(io.Discard, "green")
-	color.RGB(0, 0, 1).Fprint(io.Discard, "blue")
-}
-
 func TestPrint(t *testing.T) {
 	color.Terminal = true
 

README.md

@@ -4,10 +4,9 @@ Adds color to your terminal output.
 
 ## Features
 
-- RGB color space
+- ANSI colors
-- LCH color space (oklch)
+- LCH colors
-- Truecolor terminal output
+- RGB colors
-- Zero dependencies (excluding tests)
 
 ## Installation
 
@@ -28,7 +27,6 @@ orange.Println("orange text")
 ## Tests
 
 ```
-PASS: TestFprint
 PASS: TestPrint
 PASS: TestPrintf
 PASS: TestPrintln
@@ -41,12 +39,10 @@ coverage: 100.0% of statements
 ## Benchmarks
 
 ```
-BenchmarkRGB-12                 1000000000               0.3211 ns/op          0 B/op          0 allocs/op
+BenchmarkRGB-12                 1000000000               0.3141 ns/op          0 B/op          0 allocs/op
-BenchmarkLCH-12                  4767306               251.8 ns/op             0 B/op          0 allocs/op
+BenchmarkLCH-12                  4780176               250.9 ns/op             0 B/op          0 allocs/op
-BenchmarkFprint-12               4869368               245.7 ns/op             0 B/op          0 allocs/op
+BenchmarkPrint-12                 375394              3343 ns/op               0 B/op          0 allocs/op
-BenchmarkFprintRaw-12           23155356                43.73 ns/op            0 B/op          0 allocs/op
+BenchmarkPrintRaw-12             3105022               387.3 ns/op             0 B/op          0 allocs/op
-BenchmarkPrint-12                 358099              3560 ns/op               0 B/op          0 allocs/op
-BenchmarkPrintRaw-12             3144412               378.9 ns/op             0 B/op          0 allocs/op
 ```
 
 ## License

Terminal.go

@@ -2,7 +2,9 @@ package color
 
 import (
 	"os"
+
+	"git.akyoto.dev/go/color/tty"
 )
 
 // Terminal is a boolean that indicates if we're in a terminal with truecolor support.
-var Terminal = os.Getenv("COLORTERM") == "truecolor"
+var Terminal = tty.IsTerminal(os.Stdout.Fd()) && os.Getenv("COLORTERM") == "truecolor"

ansi/Code.go

@@ -2,7 +2,6 @@ package ansi
 
 import (
 	"fmt"
-	"io"
 
 	"git.akyoto.dev/go/color"
 )
@@ -10,16 +9,6 @@ import (
 // Code represents an ANSI escape code.
 type Code int
 
-// Fprint writes the text in the given color to the writer.
-func (code Code) Fprint(writer io.Writer, args ...any) {
-	if !color.Terminal {
-		fmt.Fprint(writer, args...)
-		return
-	}
-
-	fmt.Fprintf(writer, "\x1b[%dm%s\x1b[0m", code, fmt.Sprint(args...))
-}
-
 // Print writes the text in the given color to standard output.
 func (code Code) Print(args ...any) {
 	if !color.Terminal {

ansi/Code_test.go

@@ -1,7 +1,6 @@
 package ansi_test
 
 import (
-	"os"
 	"testing"
 
 	"git.akyoto.dev/go/color"
@@ -19,15 +18,6 @@ func TestPrintRaw(t *testing.T) {
 }
 
 func testColors() {
-	ansi.Black.Fprint(os.Stdout, "Black\n")
-	ansi.White.Fprint(os.Stdout, "White\n")
-	ansi.Red.Fprint(os.Stdout, "Red\n")
-	ansi.Green.Fprint(os.Stdout, "Green\n")
-	ansi.Blue.Fprint(os.Stdout, "Blue\n")
-	ansi.Yellow.Fprint(os.Stdout, "Yellow\n")
-	ansi.Magenta.Fprint(os.Stdout, "Magenta\n")
-	ansi.Cyan.Fprint(os.Stdout, "Cyan\n")
-
 	ansi.Black.Print("Black\n")
 	ansi.White.Print("White\n")
 	ansi.Red.Print("Red\n")

go.mod

@@ -2,4 +2,7 @@ module git.akyoto.dev/go/color
 
 go 1.22.0
 
-require git.akyoto.dev/go/assert v0.1.3
+require (
+	git.akyoto.dev/go/assert v0.1.3
+	golang.org/x/sys v0.18.0
+)

go.sum

@@ -1,2 +1,4 @@
 git.akyoto.dev/go/assert v0.1.3 h1:QwCUbmG4aZYsNk/OuRBz1zWVKmGlDUHhOnnDBfn8Qw8=
 git.akyoto.dev/go/assert v0.1.3/go.mod h1:0GzMaM0eURuDwtGkJJkCsI7r2aUKr+5GmWNTFPgDocM=
+golang.org/x/sys v0.18.0 h1:DBdB3niSjOA/O0blCZBqDefyWNYveAYMNF1Wum0DYQ4=
+golang.org/x/sys v0.18.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=

tty/Terminal_darwin.go

@@ -0,0 +1,6 @@
+package tty
+
+// IsTerminal returns true if the file descriptor is a terminal.
+func IsTerminal(fd uintptr) bool {
+	return false
+}

tty/Terminal_linux.go

@@ -0,0 +1,9 @@
+package tty
+
+import "golang.org/x/sys/unix"
+
+// IsTerminal returns true if the file descriptor is a terminal.
+func IsTerminal(fd uintptr) bool {
+	_, err := unix.IoctlGetTermios(int(fd), unix.TCGETS)
+	return err == nil
+}

tty/Terminal_windows.go

@@ -0,0 +1,6 @@
+package tty
+
+// IsTerminal returns true if the file descriptor is a terminal.
+func IsTerminal(fd uintptr) bool {
+	return false
+}