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package text
import (
"bytes"
"fmt"
"github.com/mattn/go-runewidth"
"strings"
)
// Force runewidth not to treat ambiguous runes as wide chars, so that things
// like unicode ellipsis/up/down/left/right glyphs can have correct runewidth
// and can be displayed correctly in terminals.
func init() {
runewidth.DefaultCondition.EastAsianWidth = false
}
// LeftPadMaxLine pads a string on the left by a specified amount and pads the
// string on the right to fill the maxLength
func LeftPadMaxLine(text string, length, leftPad int) string {
var rightPart string = text
scrWidth := runewidth.StringWidth(text)
// truncate and ellipse if needed
if scrWidth+leftPad > length {
rightPart = runewidth.Truncate(text, length-leftPad, "…")
} else if scrWidth+leftPad < length {
rightPart = runewidth.FillRight(text, length-leftPad)
}
return fmt.Sprintf("%s%s",
strings.Repeat(" ", leftPad),
rightPart,
)
}
// LeftPad left pad each line of the given text
func LeftPad(text string, leftPad int) string {
var result bytes.Buffer
pad := strings.Repeat(" ", leftPad)
for _, line := range strings.Split(text, "\n") {
result.WriteString(pad)
result.WriteString(line)
result.WriteString("\n")
}
return result.String()
}
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