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// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package log
import (
"fmt"
"strconv"
)
const escape = "\033"
// ColorAttribute defines a single SGR Code
type ColorAttribute int
// Base ColorAttributes
const (
Reset ColorAttribute = iota
Bold
Faint
Italic
Underline
BlinkSlow
BlinkRapid
ReverseVideo
Concealed
CrossedOut
)
// Foreground text colors
const (
FgBlack ColorAttribute = iota + 30
FgRed
FgGreen
FgYellow
FgBlue
FgMagenta
FgCyan
FgWhite
)
// Foreground Hi-Intensity text colors
const (
FgHiBlack ColorAttribute = iota + 90
FgHiRed
FgHiGreen
FgHiYellow
FgHiBlue
FgHiMagenta
FgHiCyan
FgHiWhite
)
// Background text colors
const (
BgBlack ColorAttribute = iota + 40
BgRed
BgGreen
BgYellow
BgBlue
BgMagenta
BgCyan
BgWhite
)
// Background Hi-Intensity text colors
const (
BgHiBlack ColorAttribute = iota + 100
BgHiRed
BgHiGreen
BgHiYellow
BgHiBlue
BgHiMagenta
BgHiCyan
BgHiWhite
)
var (
resetBytes = ColorBytes(Reset)
fgCyanBytes = ColorBytes(FgCyan)
fgGreenBytes = ColorBytes(FgGreen)
)
type ColoredValue struct {
v any
colors []ColorAttribute
}
func (c *ColoredValue) Format(f fmt.State, verb rune) {
_, _ = f.Write(ColorBytes(c.colors...))
s := fmt.Sprintf(fmt.FormatString(f, verb), c.v)
_, _ = f.Write([]byte(s))
_, _ = f.Write(resetBytes)
}
func NewColoredValue(v any, color ...ColorAttribute) *ColoredValue {
return &ColoredValue{v: v, colors: color}
}
// ColorBytes converts a list of ColorAttributes to a byte array
func ColorBytes(attrs ...ColorAttribute) []byte {
bytes := make([]byte, 0, 20)
bytes = append(bytes, escape[0], '[')
if len(attrs) > 0 {
bytes = append(bytes, strconv.Itoa(int(attrs[0]))...)
for _, a := range attrs[1:] {
bytes = append(bytes, ';')
bytes = append(bytes, strconv.Itoa(int(a))...)
}
} else {
bytes = append(bytes, strconv.Itoa(int(Bold))...)
}
bytes = append(bytes, 'm')
return bytes
}
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