Golang State.Width方法代碼示例

// Format makes Unit satisfy the fmt.Formatter interface. The unit is formatted
// with dimensions appended. If the power if the dimension is not zero or one,
// symbol^power is appended, if the power is one, just the symbol is appended
// and if the power is zero, nothing is appended. Dimensions are appended
// in order by symbol name with positive powers ahead of negative powers.
func (u *Unit) Format(fs fmt.State, c rune) {
	if u == nil {
		fmt.Fprint(fs, "<nil>")
	}
	switch c {
	case 'v':
		if fs.Flag('#') {
			fmt.Fprintf(fs, "&%#v", *u)
			return
		}
		fallthrough
	case 'e', 'E', 'f', 'F', 'g', 'G':
		p, pOk := fs.Precision()
		w, wOk := fs.Width()
		switch {
		case pOk && wOk:
			fmt.Fprintf(fs, "%*.*"+string(c), w, p, u.value)
		case pOk:
			fmt.Fprintf(fs, "%.*"+string(c), p, u.value)
		case wOk:
			fmt.Fprintf(fs, "%*"+string(c), w, u.value)
		default:
			fmt.Fprintf(fs, "%"+string(c), u.value)
		}
	default:
		fmt.Fprintf(fs, "%%!%c(*Unit=%g)", c, u)
		return
	}
	if u.formatted == "" && len(u.dimensions) > 0 {
		u.formatted = u.dimensions.String()
	}
	fmt.Fprintf(fs, " %s", u.formatted)
}

// Format may call Sprint(f) or Fprint(f) etc. to generate its output.
func (e *goof) Format(f fmt.State, c rune) {
	s := e.getMessage(e.includeFieldsInFormat)
	fs := &bytes.Buffer{}
	fs.WriteRune('%')
	if f.Flag('+') {
		fs.WriteRune('+')
	}
	if f.Flag('-') {
		fs.WriteRune('-')
	}
	if f.Flag('#') {
		fs.WriteRune('#')
	}
	if f.Flag(' ') {
		fs.WriteRune(' ')
	}
	if f.Flag('0') {
		fs.WriteRune('0')
	}
	if w, ok := f.Width(); ok {
		fs.WriteString(fmt.Sprintf("%d", w))
	}
	if p, ok := f.Precision(); ok {
		fs.WriteString(fmt.Sprintf("%d", p))
	}
	fs.WriteRune(c)
	fmt.Fprintf(f, fs.String(), s)
}

func (m Mass) Format(fs fmt.State, c rune) {
	switch c {
	case 'v':
		if fs.Flag('#') {
			fmt.Fprintf(fs, "%T(%v)", m, float64(m))
			return
		}
		fallthrough
	case 'e', 'E', 'f', 'F', 'g', 'G':
		p, pOk := fs.Precision()
		w, wOk := fs.Width()
		switch {
		case pOk && wOk:
			fmt.Fprintf(fs, "%*.*"+string(c), w, p, float64(m))
		case pOk:
			fmt.Fprintf(fs, "%.*"+string(c), p, float64(m))
		case wOk:
			fmt.Fprintf(fs, "%*"+string(c), w, float64(m))
		default:
			fmt.Fprintf(fs, "%"+string(c), float64(m))
		}
		fmt.Fprint(fs, " kg")
	default:
		fmt.Fprintf(fs, "%%!%c(%T=%g kg)", c, m, float64(m))
		return
	}
}

func (st *stacktrace) Format(f fmt.State, c rune) {
	var text string
	if f.Flag('+') && !f.Flag('#') && c == 's' { // "%+s"
		text = formatFull(st)
	} else if f.Flag('#') && !f.Flag('+') && c == 's' { // "%#s"
		text = formatBrief(st)
	} else {
		text = map[Format]func(*stacktrace) string{
			FormatFull:  formatFull,
			FormatBrief: formatBrief,
		}[DefaultFormat](st)
	}

	formatString := "%"
	// keep the flags recognized by fmt package
	for _, flag := range "-+# 0" {
		if f.Flag(int(flag)) {
			formatString += string(flag)
		}
	}
	if width, has := f.Width(); has {
		formatString += fmt.Sprint(width)
	}
	if precision, has := f.Precision(); has {
		formatString += "."
		formatString += fmt.Sprint(precision)
	}
	formatString += string(c)
	fmt.Fprintf(f, formatString, text)
}

func (af *ansiFormatter) Format(f fmt.State, c rune) {
	// reconstruct the format string in bf
	bf := new(bytes.Buffer)
	bf.WriteByte('%')
	for _, x := range []byte{'-', '+', '#', ' ', '0'} {
		if f.Flag(int(x)) {
			bf.WriteByte(x)
		}
	}
	if w, ok := f.Width(); ok {
		fmt.Fprint(bf, w)
	}
	if p, ok := f.Precision(); ok {
		fmt.Fprintf(bf, ".%d", p)
	}
	bf.WriteRune(c)
	format := bf.String()

	if len(af.codes) == 0 {
		fmt.Fprintf(f, format, af.value)
		return
	}

	fmt.Fprintf(f, "\x1b[%d", af.codes[0])
	for _, code := range af.codes[1:] {
		fmt.Fprintf(f, ";%d", code)
	}
	f.Write([]byte{'m'})
	fmt.Fprintf(f, format, af.value)
	fmt.Fprint(f, "\x1b[0m")
}

func (e escapable) Format(f fmt.State, c rune) {
	s := "%"
	for i := 0; i < 128; i++ {
		if f.Flag(i) {
			s += string(i)
		}
	}
	if w, ok := f.Width(); ok {
		s += fmt.Sprintf("%d", w)
	}
	if p, ok := f.Precision(); ok {
		s += fmt.Sprintf(".%d", p)
	}
	// If we have an uppercase format char and a slice, format each slice
	// element
	if unicode.IsUpper(c) && reflect.TypeOf(e.x).Kind() == reflect.Slice {
		s += strings.ToLower(string(c))
		v := reflect.ValueOf(e.x)
		for i := 0; i < v.Len(); i++ {
			formatted := fmt.Sprintf(s, v.Index(i))
			io.WriteString(f, ReadableEscapeArg(formatted))
			if i+1 != v.Len() {
				io.WriteString(f, " ")
			}
		}
		return
	}
	s += string(c)
	formatted := fmt.Sprintf(s, e.x)
	io.WriteString(f, ReadableEscapeArg(formatted))
}

// TODO: Implement left/right align
func (b ByteSize) Format(f fmt.State, c rune) {
	var decimal bool
	switch c {
	case 'd':
		decimal = true
	case 'b':
		decimal = false
	case 'v':
		fmt.Fprintf(f, "%s", b.String())
		return
	default:
		fmt.Fprintf(f, "%%!%c(ByteSize=%s)", c, b.String())
		return
	}

	unit, divisor := b.UnitDivisor(decimal)
	fmtstring := "%"

	if w, ok := f.Width(); ok {
		fmtstring += fmt.Sprintf("%d", w-len(unit)-1)
	}
	if p, ok := f.Precision(); ok {
		fmtstring += fmt.Sprintf(".%d", p)
	}
	fmtstring += "f %s"

	fmt.Fprintf(f, fmtstring, float64(b)/float64(divisor), unit)
}

func format(b Bed, fs fmt.State, c rune) {
	bv := reflect.ValueOf(b)
	if bv.IsNil() {
		fmt.Fprint(fs, "<nil>")
		return
	}
	bv = bv.Elem()
	switch c {
	case 'v':
		if fs.Flag('#') {
			fmt.Fprintf(fs, "&%#v", bv.Interface())
			return
		}
		fallthrough
	case 's':
		width, _ := fs.Width()
		if !b.canBed(width) {
			fmt.Fprintf(fs, "%%!(BADWIDTH)%T", b)
			return
		}
		if width == 0 {
			width = bv.NumField()
		}
		for i := 0; i < width; i++ {
			f := bv.Field(i).Interface()
			if i >= rgbField {
				switch i {
				case rgbField:
					rv := reflect.ValueOf(f)
					if reflect.DeepEqual(rv.Interface(), color.RGBA{}) {
						fs.Write([]byte{'0'})
					} else {
						fmt.Fprintf(fs, "%d,%d,%d",
							rv.Field(0).Interface(), rv.Field(1).Interface(), rv.Field(2).Interface())
					}
				case blockCountField:
					fmt.Fprint(fs, f)
				case blockSizesField, blockStartsField:
					av := reflect.ValueOf(f)
					l := av.Len()
					for j := 0; j < l; j++ {
						fmt.Fprint(fs, av.Index(j).Interface())
						if j < l-1 {
							fs.Write([]byte{','})
						}
					}
				}
			} else {
				fmt.Fprint(fs, f)
			}
			if i < width-1 {
				fs.Write([]byte{'\t'})
			}
		}
	default:
		fmt.Fprintf(fs, "%%!%c(%T=%3s)", c, b, b)
	}
}

// We implement fmt.Formatter interface just so we can left-align the cards.
func (s Suit) Format(f fmt.State, c int) {
	x := stringTable[s]
	f.Write([]byte(x))
	if w, ok := f.Width(); ok {
		for i := 0; i < w-len(x); i++ {
			f.Write([]byte{' '})
		}
	}
}

func (fo formatter) passThrough(f fmt.State, c rune) {
	s := "%"
	for i := 0; i < 128; i++ {
		if f.Flag(i) {
			s += string(i)
		}
	}
	if w, ok := f.Width(); ok {
		s += fmt.Sprintf("%d", w)
	}
	if p, ok := f.Precision(); ok {
		s += fmt.Sprintf(".%d", p)
	}
	s += string(c)
	fmt.Fprintf(f, s, fo.x)
}

func (r Range) Format(f fmt.State, c int) {
	i := byte(0)
	for ; i < r.Min; i++ {
		f.Write([]byte{'X'})
	}
	for ; float64(i)+0.5 < r.Mean; i++ {
		f.Write([]byte{'x'})
	}
	for ; i < r.Max; i++ {
		f.Write([]byte{'.'})
	}
	if w, ok := f.Width(); ok {
		for ; i < byte(w); i++ {
			f.Write([]byte{' '})
		}
	}
}

func (e escapable) Format(f fmt.State, c rune) {
	s := "%"
	for i := 0; i < 128; i++ {
		if f.Flag(i) {
			s += string(i)
		}
	}
	if w, ok := f.Width(); ok {
		s += fmt.Sprintf("%d", w)
	}
	if p, ok := f.Precision(); ok {
		s += fmt.Sprintf(".%d", p)
	}
	s += string(c)
	formatted := fmt.Sprintf(s, e.x)
	io.WriteString(f, ReadableEscapeArg(formatted))
}

func defaultFormat(v interface{}, f fmt.State, c rune) {
	buf := make([]string, 0, 10)
	buf = append(buf, "%")
	for i := 0; i < 128; i++ {
		if f.Flag(i) {
			buf = append(buf, string(i))
		}
	}

	if w, ok := f.Width(); ok {
		buf = append(buf, strconv.Itoa(w))
	}
	if p, ok := f.Precision(); ok {
		buf = append(buf, "."+strconv.Itoa(p))
	}
	buf = append(buf, string(c))
	format := strings.Join(buf, "")
	fmt.Fprintf(f, format, v)
}

func formatString(fs fmt.State, c rune) string {
	w, wOk := fs.Width()
	p, pOk := fs.Precision()
	var b bytes.Buffer
	b.WriteByte('%')
	for _, f := range "+-# 0" {
		if fs.Flag(int(f)) {
			b.WriteRune(f)
		}
	}
	if wOk {
		fmt.Fprint(&b, w)
	}
	if pOk {
		b.WriteByte('.')
		fmt.Fprint(&b, p)
	}
	b.WriteRune(c)
	return b.String()
}

func (x *M_Cmd) Format(f fmt.State, c int) {
	if c == 'v' && f.Flag('#') && x != nil {
		fmt.Fprintf(f, "M_%s", M_Cmd_name[int32(*x)])
		return
	}

	s := "%"
	for i := 0; i < 128; i++ {
		if f.Flag(i) {
			s += string(i)
		}
	}
	if w, ok := f.Width(); ok {
		s += fmt.Sprintf("%d", w)
	}
	if p, ok := f.Precision(); ok {
		s += fmt.Sprintf(".%d", p)
	}
	s += string(c)
	fmt.Fprintf(f, s, (*int32)(x))
}