Celestino Amoroso
9fb611aa20
DictType and ListType formatter use both indent and flag options. Simple-store now makes a DictType from its data and its ToString() function returns dict.ToString()
80 lines
1.5 KiB
Go
80 lines
1.5 KiB
Go
// Copyright (c) 2024 Celestino Amoroso (celestino.amoroso@gmail.com).
|
|
// All rights reserved.
|
|
|
|
// formatter.go
|
|
package expr
|
|
|
|
import "fmt"
|
|
|
|
type FmtOpt uint32 // lower 16 bits hold a bit-mask, higher 16 bits hold an indentation number
|
|
|
|
const (
|
|
TTY FmtOpt = 1 << iota
|
|
MultiLine
|
|
Truncate
|
|
Base2
|
|
Base8
|
|
Base10
|
|
Base16
|
|
)
|
|
|
|
const (
|
|
TruncateEllipsis = "(...)"
|
|
MinTruncateSize = 10
|
|
TruncateSize = MinTruncateSize + 15
|
|
)
|
|
|
|
func TruncateString(s string) (trunc string) {
|
|
finalPart := len(s) - (MinTruncateSize - len(TruncateEllipsis))
|
|
trunc = s[0:len(s)-MinTruncateSize] + TruncateEllipsis + s[finalPart:]
|
|
return
|
|
}
|
|
|
|
func MakeFormatOptions(flags FmtOpt, indent int) FmtOpt {
|
|
return FmtOpt(indent<<16) | flags
|
|
}
|
|
|
|
func GetFormatFlags(opt FmtOpt) FmtOpt {
|
|
return opt & 0xFFFF
|
|
}
|
|
|
|
func GetFormatIndent(opt FmtOpt) int {
|
|
return int(opt >> 16)
|
|
}
|
|
|
|
type Formatter interface {
|
|
ToString(options FmtOpt) string
|
|
}
|
|
|
|
func getFormatted(v any, opt FmtOpt) (text string) {
|
|
if v == nil {
|
|
text = "(nil)"
|
|
} else if s, ok := v.(string); ok {
|
|
text = s
|
|
} else if formatter, ok := v.(Formatter); ok {
|
|
text = formatter.ToString(opt)
|
|
} else {
|
|
text = fmt.Sprintf("%v", v)
|
|
}
|
|
return
|
|
}
|
|
|
|
type Typer interface {
|
|
TypeName() string
|
|
}
|
|
|
|
func TypeName(v any) (name string) {
|
|
if v == nil {
|
|
name = "nil"
|
|
} else if typer, ok := v.(Typer); ok {
|
|
name = typer.TypeName()
|
|
} else if IsInteger(v) {
|
|
name = "integer"
|
|
} else if IsFloat(v) {
|
|
name = "float"
|
|
} else {
|
|
name = fmt.Sprintf("%T", v)
|
|
}
|
|
return
|
|
}
|