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package mardown
import (
"errors"
"fmt"
"html/template"
)
var ErrInvalidHeader = errors.New("invalid header")
type astHeader struct {
level uint
content []block
}
func (a *astHeader) Eval() (template.HTML, error) {
if a.level > 6 {
return "", ErrInvalidHeader
}
var content template.HTML
for _, b := range a.content {
c, err := b.Eval()
if err != nil {
return "", err
}
content += c
}
return template.HTML(fmt.Sprintf("<h%d>%s<h%d>", a.level, content, a.level)), nil
}
func header(lxs lexers) (block, error) {
b := &astHeader{level: uint(len(lxs.Current().Value))}
for lxs.Next() && lxs.Current().Type != lexerBreak {
bl, err := getBlock(lxs)
if err != nil {
return nil, err
}
// if this is a header, just consider it as literal #
if h, ok := bl.(*astHeader); ok {
var s string
for range h.level {
s += "#"
}
b.content = append(b.content, astLiteral(s))
b.content = append(b.content, h.content...)
}
b.content = append(b.content, bl)
}
return b, nil
}
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