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