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|
package markdown
import (
"errors"
"html/template"
"strings"
"git.anhgelus.world/anhgelus/small-web/dom"
)
var (
ErrInvalidParagraph = errors.New("invalid paragraph")
)
type astParagraph struct {
content []block
oneLine bool
}
func (a *astParagraph) Eval(opt *Option) (template.HTML, *ParseError) {
var content template.HTML
for _, c := range a.content {
ct, err := c.Eval(opt)
if err != nil {
return "", err
}
content += ct
}
if a.oneLine {
return content, nil
}
return dom.NewParagraph(
template.HTML(strings.TrimSpace(string(content))),
).Render(), nil
}
func paragraph(lxs *lexers, oneLine bool) (*astParagraph, *ParseError) {
tree := new(astParagraph)
tree.oneLine = oneLine
maxBreak := 2
if oneLine {
maxBreak = 1
}
n := 0
lxs.current-- // because we do not use it before the next
for lxs.Next() && n < maxBreak {
switch lxs.Current().Type {
case lexerBreak:
n += len(lxs.Current().Value)
case lexerQuote, lexerList:
if n > 0 {
lxs.Before() // because we did not use it
return tree, nil
}
tree.content = append(tree.content, astLiteral(lxs.Current().Value))
case lexerLiteral, lexerHeader:
s := lxs.Current().Value
// replace line break by space
if n > 0 && len(tree.content) != 0 {
s = " " + s
}
n = 0
tree.content = append(tree.content, astLiteral(s))
case lexerModifier:
// replace line break by space
if n > 0 {
tree.content = append(tree.content, astLiteral(" "))
}
n = 0
mod, err := modifier(lxs)
if err != nil {
return nil, &ParseError{lxs: *lxs, internal: err}
}
tree.content = append(tree.content, mod)
case lexerExternal:
if n > 0 && lxs.Current().Value == "