sampler-fork/component/util/format.go

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package util
import (
"bytes"
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"fmt"
ui "github.com/gizak/termui/v3"
"image"
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"math"
"strconv"
"strings"
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)
var AsciiLogo = []string{
" __ ",
" _________ ____ ___ ____ / /__ _____",
" / ___/ __ `/ __ `__ \\/ __ \\/ / _ \\/ ___/",
" (__ ) /_/ / / / / / / /_/ / / __/ / ",
"/____/\\__,_/_/ /_/ /_/ .___/_/\\___/_/ ",
" /_/ ",
}
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func FormatValue(value float64, scale int) string {
if math.Abs(value) == math.MaxFloat64 {
return "Inf"
} else {
return formatTrailingDigits(addRadixChars(value), scale)
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}
}
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func FormatDelta(value float64, scale int) string {
abs := math.Abs(value)
val := value
scl := scale
postfix := ""
if abs > 1000 && abs < 1000000 {
val = float64(value) / 1000
postfix = "k"
} else if abs > 1000000 && abs < 1000000000 {
val = float64(value) / 1000000
postfix = "M"
} else if abs > 1000000000 {
val = float64(value) / 1000000000
postfix = "B"
}
if abs > 1000 {
scl = 1
}
if val == 0 {
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return " 0"
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} else if val > 0 {
return fmt.Sprintf("+%s%s", FormatValue(val, scl), postfix)
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} else {
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return fmt.Sprintf("%s%s", FormatValue(val, scl), postfix)
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}
}
func addRadixChars(value float64) string {
buf := &bytes.Buffer{}
if value < 0 {
buf.Write([]byte{'-'})
value = 0 - value
}
radix := []byte{','}
parts := strings.Split(strconv.FormatFloat(value, 'f', -1, 64), ".")
pos := 0
if len(parts[0])%3 != 0 {
pos += len(parts[0]) % 3
buf.WriteString(parts[0][:pos])
buf.Write(radix)
}
for ; pos < len(parts[0]); pos += 3 {
buf.WriteString(parts[0][pos : pos+3])
buf.Write(radix)
}
buf.Truncate(buf.Len() - 1)
if len(parts) > 1 {
buf.Write([]byte{'.'})
buf.WriteString(parts[1])
}
return buf.String()
}
func formatTrailingDigits(value string, scale int) string {
if i := strings.Index(value, "."); i >= 0 {
formatted := value
if scale <= 0 {
formatted = value[:i]
}
i++
if i+scale < len(value) {
formatted = value[:i+scale]
}
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formatted = strings.TrimRight(formatted, "0")
return strings.TrimRight(formatted, ".")
}
return value
}
func GetMiddlePoint(rectangle image.Rectangle, text string, offset int) image.Point {
return image.Pt(rectangle.Min.X+rectangle.Dx()/2-len(text)/2, rectangle.Max.Y-rectangle.Dy()/2+offset)
}
func PrintString(s string, style ui.Style, p image.Point, buffer *ui.Buffer) {
for i, char := range s {
buffer.SetCell(ui.Cell{Rune: char, Style: style}, image.Pt(p.X+i, p.Y))
}
}