Documentation
¶
Overview ¶
Package wcwidth provides functions to determine the number of columns required when printing to a terminal.
http://www.opengroup.org/onlinepubs/007904975/functions/wcwidth.html
Index ¶
Examples ¶
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func ParagraphLineBreak ¶
ParagraphLineBreak splits the text such that the first component will occupy no more than maxlen columns. Leading spaces are trimmed from lines.
Example ¶
package main
import (
"fmt"
"git.sr.ht/~rj/sgr/wcwidth"
)
const lorem = `Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer feugiat scelerisque est non feugiat. Donec at ligula tristique neque dignissim pellentesque sit amet dictum magna. Phasellus dictum cursus quam, sit amet iaculis magna mollis vitae. Sed libero justo, tempus vitae ullamcorper et, aliquam sit amet augue. Vivamus erat libero, tincidunt tincidunt est et, pellentesque semper lacus. Donec elementum non odio.`
func main() {
const width = 60 /* columns */
line, _, rest := wcwidth.ParagraphLineBreak(width, lorem)
fmt.Println(line)
for rest != "" {
line, _, rest = wcwidth.ParagraphLineBreak(width, rest)
fmt.Println(line)
}
}
Output: Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer feugiat scelerisque est non feugiat. Donec at ligula tristique neque dignissim pellentesque sit amet dictum magna. Phasellus dictum cursus quam, sit amet iaculis magna mollis vitae. Sed libero justo, tempus vitae ullamcorper et, aliquam sit amet augue. Vivamus erat libero, tincidunt tincidunt est et, pellentesque semper lacus. Donec elementum non odio.
func RuneWidth ¶
RuneWidth return the number of columns required when printing the rune to a terminal.
If the rune is the null character, this functionos returns zero.
If the rune is a control character, this functions a non-specified value.
func StringWidth ¶
StringWidth returns the number of columns required when printing the string to a terminal. The string should not contain the null character, or any control character.
Example ¶
package main
import (
"fmt"
"strings"
"git.sr.ht/~rj/sgr/wcwidth"
)
func main() {
const line = "Hello, 世界!"
fmt.Println("01234567899876543210")
width := wcwidth.StringWidth(line)
fmt.Printf("%s%s\n", strings.Repeat(" ", (20-width)/2), line)
}
Output: 01234567899876543210 Hello, 世界!
Types ¶
This section is empty.
Source Files