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package ansi
import (
"io"
"github.com/muesli/reflow/indent"
"github.com/muesli/reflow/padding"
)
// MarginWriter is a Writer that applies indentation and padding around
// whatever you write to it.
type MarginWriter struct {
w io.Writer
pw *padding.Writer
iw *indent.Writer
}
// NewMarginWriter returns a new MarginWriter.
func NewMarginWriter(ctx RenderContext, w io.Writer, rules StyleBlock) *MarginWriter {
bs := ctx.blockStack
var indentation uint
var margin uint
if rules.Indent != nil {
indentation = *rules.Indent
}
if rules.Margin != nil {
margin = *rules.Margin
}
pw := padding.NewWriterPipe(w, bs.Width(ctx), func(wr io.Writer) {
renderText(w, ctx.options.ColorProfile, rules.StylePrimitive, " ")
})
ic := " "
if rules.IndentToken != nil {
ic = *rules.IndentToken
}
iw := indent.NewWriterPipe(pw, indentation+margin, func(wr io.Writer) {
renderText(w, ctx.options.ColorProfile, bs.Parent().Style.StylePrimitive, ic)
})
return &MarginWriter{
w: w,
pw: pw,
iw: iw,
}
}
func (w *MarginWriter) Write(b []byte) (int, error) {
return w.iw.Write(b)
}
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