86 lines
2.2 KiB
Go
86 lines
2.2 KiB
Go
|
package clifmt
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
"regexp"
|
||
|
|
)
|
||
|
|
|
||
|
|
// extractor helps extract features from the coloring format defined as follows :
|
||
|
|
//
|
||
|
|
// - [Color] -> [a-z] # named color
|
||
|
|
// - [Color] -> #[0-9a-f]{3} # hexa color (shortcode)
|
||
|
|
// - [Color] -> #[0-9a-f]{6} # hexa color (full-sized)
|
||
|
|
// - [Text] -> ANY
|
||
|
|
// - [Format] -> ${Text}(Color:Color) # foreground, background colors
|
||
|
|
// - [Format] -> ${Text}(Color) # foreground color only
|
||
|
|
// - [Format] -> ${Text}(:Color) # background color only
|
||
|
|
var extractor = regexp.MustCompile(`(?m)\${([^$]+)}\(((?:[a-z]+|#(?:[0-9a-f]{3}|[0-9a-f]{6})))?(?:\:((?:[a-z]+|#(?:[0-9a-f]{3}|[0-9a-f]{6}))))?\)`)
|
||
|
|
|
||
|
|
func Printf(format string, a ...interface{}) error {
|
||
|
|
// 1. Pre-process format with 'fmt'
|
||
|
|
input := fmt.Sprintf(format, a...)
|
||
|
|
output := ""
|
||
|
|
cursor := int(0)
|
||
|
|
|
||
|
|
// 2. extract color format matches
|
||
|
|
for _, match := range extractor.FindAllStringSubmatchIndex(input, -1) {
|
||
|
|
// (1) add gap between input start OR previous match
|
||
|
|
output += input[cursor:match[0]]
|
||
|
|
cursor = match[1]
|
||
|
|
|
||
|
|
// (2) extract features
|
||
|
|
var (
|
||
|
|
err = error(nil)
|
||
|
|
text = ""
|
||
|
|
sForeground = ""
|
||
|
|
sBackground = ""
|
||
|
|
foreground = terminalColor(0)
|
||
|
|
background = terminalColor(0)
|
||
|
|
)
|
||
|
|
|
||
|
|
if match[3]-match[2] > 0 {
|
||
|
|
text = input[match[2]:match[3]]
|
||
|
|
}
|
||
|
|
if match[5]-match[4] > 0 {
|
||
|
|
sForeground = input[match[4]:match[5]]
|
||
|
|
foreground, err = parseColor(sForeground)
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if match[7]-match[6] > 0 {
|
||
|
|
sBackground = input[match[6]:match[7]]
|
||
|
|
background, err = parseColor(sBackground)
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// (3) replace text with colorized text
|
||
|
|
if len(sForeground) > 0 {
|
||
|
|
text = colorize(text, true, foreground)
|
||
|
|
}
|
||
|
|
if len(sBackground) > 0 {
|
||
|
|
text = colorize(text, false, background)
|
||
|
|
}
|
||
|
|
output += text
|
||
|
|
}
|
||
|
|
|
||
|
|
// 3. Add end of input
|
||
|
|
if cursor < len(input)-1 {
|
||
|
|
output += input[cursor:]
|
||
|
|
}
|
||
|
|
|
||
|
|
// 3. print final output
|
||
|
|
fmt.Print(output)
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func colorize(text string, foregound bool, color terminalColor) string {
|
||
|
|
if foregound {
|
||
|
|
return fmt.Sprintf("\033[38;2;%d;%d;%dm%s\033[0m", color.Red(), color.Green(), color.Blue(), text)
|
||
|
|
}
|
||
|
|
|
||
|
|
return fmt.Sprintf("\033[48;2;%d;%d;%dm%s\033[0m", color.Red(), color.Green(), color.Blue(), text)
|
||
|
|
}
|