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tea/vendor/github.com/charmbracelet/glamour/ansi/baseelement.go

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package ansi
import (
"bytes"
"io"
"text/template"
"github.com/muesli/termenv"
)
// BaseElement renders a styled primitive element.
type BaseElement struct {
Token string
Prefix string
Suffix string
Style StylePrimitive
}
func formatToken(format string, token string) (string, error) {
var b bytes.Buffer
v := make(map[string]interface{})
v["text"] = token
tmpl, err := template.New(format).Funcs(TemplateFuncMap).Parse(format)
if err != nil {
return "", err
}
err = tmpl.Execute(&b, v)
return b.String(), err
}
func renderText(w io.Writer, p termenv.Profile, rules StylePrimitive, s string) {
if len(s) == 0 {
return
}
out := termenv.String(s)
if rules.Color != nil {
out = out.Foreground(p.Color(*rules.Color))
}
if rules.BackgroundColor != nil {
out = out.Background(p.Color(*rules.BackgroundColor))
}
if rules.Underline != nil && *rules.Underline {
out = out.Underline()
}
if rules.Bold != nil && *rules.Bold {
out = out.Bold()
}
if rules.Italic != nil && *rules.Italic {
out = out.Italic()
}
if rules.CrossedOut != nil && *rules.CrossedOut {
out = out.CrossOut()
}
if rules.Overlined != nil && *rules.Overlined {
out = out.Overline()
}
if rules.Inverse != nil && *rules.Inverse {
out = out.Reverse()
}
if rules.Blink != nil && *rules.Blink {
out = out.Blink()
}
_, _ = w.Write([]byte(out.String()))
}
func (e *BaseElement) Render(w io.Writer, ctx RenderContext) error {
bs := ctx.blockStack
renderText(w, ctx.options.ColorProfile, bs.Current().Style.StylePrimitive, e.Prefix)
defer func() {
renderText(w, ctx.options.ColorProfile, bs.Current().Style.StylePrimitive, e.Suffix)
}()
rules := bs.With(e.Style)
// render unstyled prefix/suffix
renderText(w, ctx.options.ColorProfile, bs.Current().Style.StylePrimitive, rules.BlockPrefix)
defer func() {
renderText(w, ctx.options.ColorProfile, bs.Current().Style.StylePrimitive, rules.BlockSuffix)
}()
// render styled prefix/suffix
renderText(w, ctx.options.ColorProfile, rules, rules.Prefix)
defer func() {
renderText(w, ctx.options.ColorProfile, rules, rules.Suffix)
}()
s := e.Token
if len(rules.Format) > 0 {
var err error
s, err = formatToken(rules.Format, s)
if err != nil {
return err
}
}
renderText(w, ctx.options.ColorProfile, rules, s)
return nil
}