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format.go
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format.go
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package columns
import (
"fmt"
"math"
"strconv"
"strings"
)
const (
space = " "
)
func (cw *Writer) format(cell *CellData) (txt string, size int, sizeI int, sizeF int) {
sizeI = 0
sizeF = 0
switch v := cell.value.(type) {
case string:
txt = v
size = len([]rune(txt))
case int:
txt, size, sizeI, sizeF = cw.formatNumeric(strconv.FormatInt(abs(int64(v)), 10), v < 0)
case int64:
txt, size, sizeI, sizeF = cw.formatNumeric(strconv.FormatInt(abs(v), 10), v < 0)
case float64:
txt, size, sizeI, sizeF = cw.formatNumeric(fmt.Sprintf("%v", math.Abs(v)), v < 0)
default:
txt = fmt.Sprintf("%v", v)
size = len([]rune(txt))
}
return txt, size, sizeI, sizeF
}
func abs(v int64) int64 {
if v < 0 {
return -v
}
return v
}
func (cw *Writer) formatNumeric(input string, neg bool) (txt string, size int, sizeI int, sizeF int) {
parts := strings.Split(input, ".")
var txtI, txtF string
txtI = separate(parts[0], -len(parts[0]), cw.ThousandSeparator)
if neg {
txtI = "- " + txtI
}
if len(parts) > 1 {
txtF = parts[1]
}
sizeI = len([]rune(txtI))
sizeF = len([]rune(txtF))
txt = txtI
size = sizeI
if sizeF > 0 {
size += 1 + sizeF
txt += string(cw.DecimalSeparator) + txtF
}
return txt, size, sizeI, sizeF
}
func separate(txt string, i int, sep rune) string {
result := make([]rune, 0, 10)
lastWasSeparator := false
for _, ch := range txt {
lastWasSeparator = false
result = append(result, ch)
i++
if i%3 == 0 && sep != rune(0) {
lastWasSeparator = true
result = append(result, sep)
}
}
if lastWasSeparator {
result = result[:len(result)-1]
}
return string(result)
}