1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
|
// colorstring provides functions for colorizing strings for terminal
// output.
package colorstring
import (
"bytes"
"fmt"
"regexp"
)
// Color colorizes your strings using the default settings.
//
// Strings given to Color should use the syntax `[color]` to specify the
// color for text following. For example: `[blue]Hello` will return "Hello"
// in blue. See DefaultColors for all the supported colors and attributes.
//
// If an unrecognized color is given, it is ignored and assumed to be part
// of the string. For example: `[hi]world` will result in "[hi]world".
//
// A color reset is appended to the end of every string. This will reset
// the color of following strings when you output this text to the same
// terminal session.
//
// If you want to customize any of this behavior, use the Colorize struct.
func Color(v string) string {
return def.Color(v)
}
// Colorize colorizes your strings, giving you the ability to customize
// some of the colorization process.
//
// The options in Colorize can be set to customize colorization. If you're
// only interested in the defaults, just use the top Color function directly,
// which creates a default Colorize.
type Colorize struct {
// Colors maps a color string to the code for that color. The code
// is a string so that you can use more complex colors to set foreground,
// background, attributes, etc. For example, "boldblue" might be
// "1;34"
Colors map[string]string
// If true, color attributes will be ignored. This is useful if you're
// outputting to a location that doesn't support colors and you just
// want the strings returned.
Disable bool
// Reset, if true, will reset the color after each colorization by
// adding a reset code at the end.
Reset bool
}
// Color colorizes a string according to the settings setup in the struct.
//
// For more details on the syntax, see the top-level Color function.
func (c *Colorize) Color(v string) string {
matches := parseRe.FindAllStringIndex(v, -1)
if len(matches) == 0 {
return v
}
result := new(bytes.Buffer)
colored := false
m := []int{0, 0}
for _, nm := range matches {
// Write the text in between this match and the last
result.WriteString(v[m[1]:nm[0]])
m = nm
var replace string
color := v[m[0]+1 : m[1]-1]
if code, ok := c.Colors[color]; ok {
if color == "reset" {
colored = false
} else {
colored = true
}
if !c.Disable {
replace = fmt.Sprintf("\033[%sm", code)
}
} else {
replace = v[m[0]:m[1]]
}
result.WriteString(replace)
}
result.WriteString(v[m[1]:])
if colored && c.Reset && !c.Disable {
// Write the clear byte at the end
result.WriteString("\033[0m")
}
return result.String()
}
// DefaultColors are the default colors used when colorizing.
//
// If the color is surrounded in underscores, such as "_blue_", then that
// color will be used for the background color.
var DefaultColors map[string]string
func init() {
DefaultColors = map[string]string{
// Default foreground/background colors
"default": "39",
"_default_": "49",
// Foreground colors
"black": "30",
"red": "31",
"green": "32",
"yellow": "33",
"blue": "34",
"magenta": "35",
"cyan": "36",
"light_gray": "37",
"dark_gray": "90",
"light_red": "91",
"light_green": "92",
"light_yellow": "93",
"light_blue": "94",
"light_magenta": "95",
"light_cyan": "96",
"white": "97",
// Background colors
"_black_": "40",
"_red_": "41",
"_green_": "42",
"_yellow_": "43",
"_blue_": "44",
"_magenta_": "45",
"_cyan_": "46",
"_light_gray_": "47",
"_dark_gray_": "100",
"_light_red_": "101",
"_light_green_": "102",
"_light_yellow_": "103",
"_light_blue_": "104",
"_light_magenta_": "105",
"_light_cyan_": "106",
"_white_": "107",
// Attributes
"bold": "1",
"dim": "2",
"underline": "4",
"blink_slow": "5",
"blink_fast": "6",
"invert": "7",
"hidden": "8",
// Reset to reset everything to their defaults
"reset": "0",
"reset_bold": "21",
}
def = Colorize{
Colors: DefaultColors,
Reset: true,
}
}
var def Colorize
var parseRe = regexp.MustCompile(`(?i)\[[a-z0-9_-]+\]`)
|
