55 lines
1 KiB
Go
55 lines
1 KiB
Go
package utilities
|
|
|
|
import (
|
|
"strings"
|
|
"unicode"
|
|
)
|
|
|
|
func WrapLines(text, separator string, charLimit int) string {
|
|
lines := strings.Split(text, "\n")
|
|
|
|
if len(lines) == 1 {
|
|
return wrapLine(lines[0], separator, charLimit)
|
|
}
|
|
|
|
var builder strings.Builder
|
|
|
|
for i, line := range lines {
|
|
builder.WriteString(wrapLine(line, separator, charLimit))
|
|
|
|
if i < len(lines)-1 {
|
|
builder.WriteString(separator)
|
|
}
|
|
}
|
|
|
|
return builder.String()
|
|
}
|
|
|
|
func wrapLine(line, separator string, charLimit int) string {
|
|
if len(line) <= charLimit {
|
|
return line
|
|
}
|
|
|
|
leftcursor, rightcursor := 0, 0
|
|
|
|
var builder strings.Builder
|
|
|
|
for rightcursor < (len(line) - charLimit) {
|
|
rightcursor += charLimit
|
|
|
|
for !unicode.IsSpace(rune(line[rightcursor-1])) && (rightcursor > leftcursor) {
|
|
rightcursor--
|
|
}
|
|
|
|
if rightcursor == leftcursor {
|
|
rightcursor = leftcursor + charLimit
|
|
}
|
|
|
|
builder.WriteString(line[leftcursor:rightcursor] + separator)
|
|
leftcursor = rightcursor
|
|
}
|
|
|
|
builder.WriteString(line[rightcursor:])
|
|
|
|
return builder.String()
|
|
}
|