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