44 lines
1.0 KiB
Go
44 lines
1.0 KiB
Go
|
package chroma
|
||
|
|
|
||
|
|
import (
|
||
|
|
"io"
|
||
|
|
)
|
||
|
|
|
||
|
|
// A Formatter for Chroma lexers.
|
||
|
|
type Formatter interface {
|
||
|
|
// Format returns a formatting function for tokens.
|
||
|
|
//
|
||
|
|
// If the iterator panics, the Formatter should recover.
|
||
|
|
Format(w io.Writer, style *Style, iterator Iterator) error
|
||
|
|
}
|
||
|
|
|
||
|
|
// A FormatterFunc is a Formatter implemented as a function.
|
||
|
|
//
|
||
|
|
// Guards against iterator panics.
|
||
|
|
type FormatterFunc func(w io.Writer, style *Style, iterator Iterator) error
|
||
|
|
|
||
|
|
func (f FormatterFunc) Format(w io.Writer, s *Style, it Iterator) (err error) {
|
||
|
|
defer func() {
|
||
|
|
if perr := recover(); perr != nil {
|
||
|
|
err = perr.(error)
|
||
|
|
}
|
||
|
|
}()
|
||
|
|
return f(w, s, it)
|
||
|
|
}
|
||
|
|
|
||
|
|
type recoveringFormatter struct {
|
||
|
|
Formatter
|
||
|
|
}
|
||
|
|
|
||
|
|
func (r recoveringFormatter) Format(w io.Writer, s *Style, it Iterator) (err error) {
|
||
|
|
defer func() {
|
||
|
|
if perr := recover(); perr != nil {
|
||
|
|
err = perr.(error)
|
||
|
|
}
|
||
|
|
}()
|
||
|
|
return r.Formatter.Format(w, s, it)
|
||
|
|
}
|
||
|
|
|
||
|
|
// RecoveringFormatter wraps a formatter with panic recovery.
|
||
|
|
func RecoveringFormatter(formatter Formatter) Formatter { return recoveringFormatter{formatter} }
|