mirror of
https://github.com/pbnjay/grate.git
synced 2024-12-12 21:49:14 +02:00
276 lines
6.3 KiB
Go
276 lines
6.3 KiB
Go
package commonxl
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import (
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"fmt"
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"strconv"
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"strings"
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)
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// FmtFunc will format a value according to the designated style.
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type FmtFunc func(*Formatter, interface{}) string
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func staticFmtFunc(s string) FmtFunc {
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return func(x *Formatter, v interface{}) string {
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return s
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}
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}
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func surround(pre string, ff FmtFunc, post string) FmtFunc {
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return func(x *Formatter, v interface{}) string {
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return pre + ff(x, v) + post
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}
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}
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func addNegParens(ff FmtFunc) FmtFunc {
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return func(x *Formatter, v interface{}) string {
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s1 := ff(x, v)
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if s1[0] == '-' {
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return "(" + s1[1:] + ")"
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}
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return s1
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}
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}
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func addCommas(ff FmtFunc) FmtFunc {
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return func(x *Formatter, v interface{}) string {
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s1 := ff(x, v)
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isNeg := false
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if s1[0] == '-' {
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isNeg = true
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s1 = s1[1:]
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}
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endIndex := strings.IndexAny(s1, ".eE")
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if endIndex < 0 {
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endIndex = len(s1)
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}
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for endIndex > 3 {
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endIndex -= 3
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s1 = s1[:endIndex] + "," + s1[endIndex:]
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}
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if isNeg {
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return "-" + s1
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}
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return s1
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}
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}
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func identFunc(x *Formatter, v interface{}) string {
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if s, ok := v.(string); ok {
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return s
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}
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return fmt.Sprint(v)
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}
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func sprintfFunc(fs string, mul int) FmtFunc {
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wantInt64 := strings.Contains(fs, "%d")
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return func(x *Formatter, v interface{}) string {
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switch val := v.(type) {
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case int, uint, int64, uint64, int32, uint32, uint16, int16:
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return fmt.Sprintf(fs, v)
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case float64:
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val *= float64(mul)
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if wantInt64 {
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v2 := int64(val)
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return fmt.Sprintf(fs, v2)
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}
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return fmt.Sprintf(fs, val)
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}
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return fmt.Sprint(v)
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}
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}
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func convertToInt64(v interface{}) (int64, bool) {
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x, ok := convertToFloat64(v)
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return int64(x), ok
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}
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func convertToFloat64(v interface{}) (float64, bool) {
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switch val := v.(type) {
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case float64:
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return val, true
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case bool:
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if val {
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return 1.0, true
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}
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return 0.0, true
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case int:
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return float64(val), true
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case int8:
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return float64(val), true
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case int16:
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return float64(val), true
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case int32:
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return float64(val), true
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case int64:
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return float64(val), true
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case uint:
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return float64(val), true
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case uint8:
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return float64(val), true
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case uint16:
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return float64(val), true
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case uint32:
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return float64(val), true
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case uint64:
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return float64(val), true
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case float32:
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return float64(val), true
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case string:
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nf, err := strconv.ParseFloat(val, 64)
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return nf, err == nil
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default:
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return 0.0, false
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}
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}
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// replaces a zero with a dash
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func zeroDashFunc(ff FmtFunc) FmtFunc {
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return func(x *Formatter, v interface{}) string {
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fval, ok := convertToFloat64(v)
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if !ok {
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// strings etc returned as-is
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return fmt.Sprint(v)
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}
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if fval == 0.0 {
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return "-"
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}
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return ff(x, v)
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}
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}
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func fracFmtFunc(n int) FmtFunc {
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return func(x *Formatter, v interface{}) string {
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f, ok := convertToFloat64(v)
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if !ok {
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return "MUST BE numeric TO FORMAT CORRECTLY"
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}
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w, n, d := DecimalToWholeFraction(f, n, n)
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if n == 0 {
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return fmt.Sprintf("%d", w)
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}
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return fmt.Sprintf("%d %d/%d", w, n, d)
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}
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}
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// handle (up to) all four format cases:
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// positive;negative;zero;other
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func switchFmtFunc(pos FmtFunc, others ...FmtFunc) FmtFunc {
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stringFF := identFunc
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zeroFF := pos
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negFF := pos
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if len(others) > 0 {
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negFF = others[0]
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if len(others) > 1 {
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zeroFF = others[1]
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if len(others) > 2 {
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stringFF = others[2]
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}
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}
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}
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return func(x *Formatter, v interface{}) string {
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val, ok := convertToFloat64(v)
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if !ok {
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return stringFF(x, v)
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}
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if val == 0.0 {
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return zeroFF(x, v)
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}
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if val < 0.0 {
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return negFF(x, v)
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}
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return pos(x, v)
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}
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}
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// mapping of standard built-ins to Go date format funcs.
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var goFormatters = map[uint16]FmtFunc{
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0: identFunc, // FIXME: better "general" formatter
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49: identFunc,
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14: timeFmtFunc(`01-02-06`),
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15: timeFmtFunc(`2-Jan-06`),
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16: timeFmtFunc(`2-Jan`),
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17: timeFmtFunc(`Jan-06`),
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20: timeFmtFunc(`15:04`),
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21: timeFmtFunc(`15:04:05`),
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22: timeFmtFunc(`1/2/06 15:04`),
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45: timeFmtFunc(`04:05`),
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46: timeFmtFunc(`3:04:05`),
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47: timeFmtFunc(`0405.9`),
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27: timeFmtFunc(`2006"年"1"月"`),
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28: timeFmtFunc(`1"月"2"日"`),
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29: timeFmtFunc(`1"月"2"日"`),
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30: timeFmtFunc(`1-2-06`),
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31: timeFmtFunc(`2006"年"1"月"2"日"`),
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32: timeFmtFunc(`15"时"04"分"`),
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33: timeFmtFunc(`15"时"04"分"05"秒"`),
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36: timeFmtFunc(`2006"年"2"月"`),
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50: timeFmtFunc(`2006"年"2"月"`),
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51: timeFmtFunc(`1"月"2"日"`),
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52: timeFmtFunc(`2006"年"1"月"`),
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53: timeFmtFunc(`1"月"2"日"`),
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54: timeFmtFunc(`1"月"2"日"`),
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57: timeFmtFunc(`2006"年"1"月"`),
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58: timeFmtFunc(`1"月"2"日"`),
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71: timeFmtFunc(`2/1/2006`),
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72: timeFmtFunc(`2-Jan-06`),
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73: timeFmtFunc(`2-Jan`),
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74: timeFmtFunc(`Jan-06`),
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75: timeFmtFunc(`15:04`),
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76: timeFmtFunc(`15:04:05`),
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77: timeFmtFunc(`2/1/2006 15:04`),
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78: timeFmtFunc(`04:05`),
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79: timeFmtFunc(`15:04:05`),
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80: timeFmtFunc(`04:05.9`),
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81: timeFmtFunc(`2/1/06`),
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18: timeFmtFunc(`3:04 PM`),
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19: timeFmtFunc(`3:04:05 PM`),
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34: cnTimeFmtFunc(`PM 3"时"04"分"`),
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35: cnTimeFmtFunc(`PM 3"时"04"分"05"秒"`),
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55: cnTimeFmtFunc(`PM 3"时"04"分"`),
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56: cnTimeFmtFunc(`PM 3"时"04"分"05"秒`),
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12: fracFmtFunc(1),
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13: fracFmtFunc(2),
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69: surround("t", fracFmtFunc(1), ""),
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70: surround("t", fracFmtFunc(2), ""),
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1: sprintfFunc(`%d`, 1),
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2: sprintfFunc(`%4.2f`, 1),
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59: sprintfFunc(`t%d`, 1),
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60: sprintfFunc(`t%4.2f`, 1),
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9: sprintfFunc(`%d%%`, 100),
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10: sprintfFunc(`%4.2f%%`, 100),
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67: sprintfFunc(`t%d%%`, 100),
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68: sprintfFunc(`t%4.2f%%`, 100),
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3: addCommas(sprintfFunc("%d", 1)),
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61: surround("t", addCommas(sprintfFunc("%d", 1)), ""),
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37: addNegParens(addCommas(sprintfFunc("%d", 1))),
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38: addNegParens(addCommas(sprintfFunc("%d", 1))),
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4: addCommas(sprintfFunc("%4.2f", 1)),
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62: surround("t", addCommas(sprintfFunc("%4.2f", 1)), ""),
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39: addNegParens(addCommas(sprintfFunc("%4.2f", 1))),
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40: addNegParens(addCommas(sprintfFunc("%4.2f", 1))),
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11: sprintfFunc(`%4.2E`, 1),
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48: sprintfFunc(`%3.1E`, 1),
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41: zeroDashFunc(addCommas(sprintfFunc("%d", 1))),
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43: zeroDashFunc(addCommas(sprintfFunc("%4.2f", 1))),
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42: switchFmtFunc(
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surround("$", addCommas(sprintfFunc("%d", 1)), ""),
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surround("$(", addCommas(sprintfFunc("%d", 1)), ")"),
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staticFmtFunc("$-")),
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44: switchFmtFunc(
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surround("$", addCommas(sprintfFunc("%4.2f", 1)), ""),
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surround("$(", addCommas(sprintfFunc("%4.2f", 1)), ")"),
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staticFmtFunc("$-")),
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}
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