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e9de9684f4
Using len(...) for table cell padding produced wrong results for unicode chracters leading to misaligned tables. Implementation changed to take the actual terminal display width into consideration.
131 lines
2.7 KiB
Go
131 lines
2.7 KiB
Go
package ui
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import (
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"bytes"
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"encoding/json"
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"errors"
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"fmt"
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"math/bits"
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"strconv"
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"time"
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"golang.org/x/text/width"
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)
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func FormatBytes(c uint64) string {
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b := float64(c)
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switch {
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case c >= 1<<40:
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return fmt.Sprintf("%.3f TiB", b/(1<<40))
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case c >= 1<<30:
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return fmt.Sprintf("%.3f GiB", b/(1<<30))
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case c >= 1<<20:
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return fmt.Sprintf("%.3f MiB", b/(1<<20))
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case c >= 1<<10:
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return fmt.Sprintf("%.3f KiB", b/(1<<10))
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default:
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return fmt.Sprintf("%d B", c)
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}
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}
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// FormatPercent formats numerator/denominator as a percentage.
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func FormatPercent(numerator uint64, denominator uint64) string {
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if denominator == 0 {
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return ""
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}
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percent := 100.0 * float64(numerator) / float64(denominator)
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if percent > 100 {
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percent = 100
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}
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return fmt.Sprintf("%3.2f%%", percent)
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}
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// FormatDuration formats d as FormatSeconds would.
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func FormatDuration(d time.Duration) string {
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sec := uint64(d / time.Second)
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return FormatSeconds(sec)
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}
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// FormatSeconds formats sec as MM:SS, or HH:MM:SS if sec seconds
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// is at least an hour.
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func FormatSeconds(sec uint64) string {
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hours := sec / 3600
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sec -= hours * 3600
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min := sec / 60
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sec -= min * 60
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if hours > 0 {
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return fmt.Sprintf("%d:%02d:%02d", hours, min, sec)
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}
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return fmt.Sprintf("%d:%02d", min, sec)
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}
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// ParseBytes parses a size in bytes from s. It understands the suffixes
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// B, K, M, G and T for powers of 1024.
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func ParseBytes(s string) (int64, error) {
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if s == "" {
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return 0, errors.New("expected size, got empty string")
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}
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numStr := s[:len(s)-1]
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var unit uint64 = 1
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switch s[len(s)-1] {
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case 'b', 'B':
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// use initialized values, do nothing here
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case 'k', 'K':
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unit = 1024
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case 'm', 'M':
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unit = 1024 * 1024
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case 'g', 'G':
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unit = 1024 * 1024 * 1024
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case 't', 'T':
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unit = 1024 * 1024 * 1024 * 1024
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default:
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numStr = s
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}
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value, err := strconv.ParseInt(numStr, 10, 64)
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if err != nil {
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return 0, err
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}
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hi, lo := bits.Mul64(uint64(value), unit)
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value = int64(lo)
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if hi != 0 || value < 0 {
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return 0, fmt.Errorf("ParseSize: %q: %w", numStr, strconv.ErrRange)
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}
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return value, nil
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}
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func ToJSONString(status interface{}) string {
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buf := new(bytes.Buffer)
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err := json.NewEncoder(buf).Encode(status)
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if err != nil {
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panic(err)
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}
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return buf.String()
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}
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// TerminalDisplayWidth returns the number of terminal cells needed to display s
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func TerminalDisplayWidth(s string) int {
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width := 0
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for _, r := range s {
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width += terminalDisplayRuneWidth(r)
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}
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return width
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}
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func terminalDisplayRuneWidth(r rune) int {
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switch width.LookupRune(r).Kind() {
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case width.EastAsianWide, width.EastAsianFullwidth:
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return 2
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case width.EastAsianNarrow, width.EastAsianHalfwidth, width.EastAsianAmbiguous, width.Neutral:
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return 1
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default:
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return 0
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}
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}
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