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// Copyright 2015 The Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package markdown
import (
"regexp"
"strings"
)
var (
rAutolink = regexp.MustCompile(`^<([a-zA-Z][a-zA-Z0-9+.\-]{1,31}):([^<>\x00-\x20]*)>`)
rEmail = regexp.MustCompile(`^<([a-zA-Z0-9.!#$%&'*+/=?^_{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*)>`)
)
func ruleAutolink(s *StateInline, silent bool) bool {
pos := s.Pos
src := s.Src
if src[pos] != '<' {
return false
}
tail := src[pos:]
if strings.IndexByte(tail, '>') < 0 {
return false
}
link := rAutolink.FindString(tail)
if link != "" {
link = link[1 : len(link)-1]
href := normalizeLink(link)
if !validateLink(href) {
return false
}
if !silent {
s.PushOpeningToken(&LinkOpen{Href: href})
s.PushToken(&Text{Content: normalizeLinkText(link)})
s.PushClosingToken(&LinkClose{})
}
s.Pos += len(link) + 2
return true
}
email := rEmail.FindString(tail)
if email != "" {
email = email[1 : len(email)-1]
href := normalizeLink("mailto:" + email)
if !validateLink(href) {
return false
}
if !silent {
s.PushOpeningToken(&LinkOpen{Href: href})
s.PushToken(&Text{Content: normalizeLinkText(email)})
s.PushClosingToken(&LinkClose{})
}
s.Pos += len(email) + 2
return true
}
return false
}
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