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package decor
var (
_ Decorator = metaWrapper{}
_ Wrapper = metaWrapper{}
)
// Meta wrap decorator.
// Provided fn is supposed to wrap output of given decorator
// with meta information like ANSI escape codes for example.
// Primary usage intention is to set SGR display attributes.
//
// `decorator` Decorator to wrap
// `fn` func to apply meta information
func Meta(decorator Decorator, fn func(string) string) Decorator {
if decorator == nil {
return nil
}
return metaWrapper{decorator, fn}
}
type metaWrapper struct {
Decorator
fn func(string) string
}
func (d metaWrapper) Decor(s Statistics) (string, int) {
str, width := d.Decorator.Decor(s)
return d.fn(str), width
}
func (d metaWrapper) Unwrap() Decorator {
return d.Decorator
}
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