133 lines
2.1 KiB
Go
133 lines
2.1 KiB
Go
// Copyright 2015 The Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package markdown
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func ruleLink(s *StateInline, silent bool) bool {
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pos := s.Pos
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oldPos := s.Pos
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max := s.PosMax
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start := s.Pos
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parseReference := true
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src := s.Src
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if src[pos] != '[' {
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return false
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}
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labelStart := pos + 1
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labelEnd := parseLinkLabel(s, pos, true)
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if labelEnd < 0 {
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return false
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}
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pos = labelEnd + 1
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var title, href, label string
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if pos < max && src[pos] == '(' {
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parseReference = false
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pos++
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for pos < max {
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code := src[pos]
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if !byteIsSpace(code) && code != '\n' {
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break
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}
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pos++
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}
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if pos >= max {
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return false
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}
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start = pos
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url, _, endpos, ok := parseLinkDestination(src, pos, s.PosMax)
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if ok {
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url = normalizeLink(url)
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if validateLink(url) {
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pos = endpos
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href = url
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}
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}
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start = pos
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for pos < max {
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code := src[pos]
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if !byteIsSpace(code) && code != '\n' {
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break
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}
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pos++
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}
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title, _, endpos, ok = parseLinkTitle(src, pos, s.PosMax)
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if pos < max && start != pos && ok {
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pos = endpos
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for pos < max {
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code := src[pos]
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if !byteIsSpace(code) && code != '\n' {
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break
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}
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pos++
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}
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}
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if pos >= max || src[pos] != ')' {
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parseReference = true
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}
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pos++
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}
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if parseReference {
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if s.Env.References == nil {
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return false
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}
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if pos < max && src[pos] == '[' {
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start := pos + 1
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pos = parseLinkLabel(s, pos, false)
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if pos >= 0 {
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label = src[start:pos]
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pos++
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} else {
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pos = labelEnd + 1
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}
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} else {
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pos = labelEnd + 1
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}
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if label == "" {
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label = src[labelStart:labelEnd]
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}
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ref, ok := s.Env.References[normalizeReference(label)]
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if !ok {
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s.Pos = oldPos
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return false
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}
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href = ref["href"]
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title = ref["title"]
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}
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if !silent {
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s.Pos = labelStart
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s.PosMax = labelEnd
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s.PushOpeningToken(&LinkOpen{
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Href: href,
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Title: title,
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})
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s.Md.Inline.Tokenize(s)
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s.PushClosingToken(&LinkClose{})
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}
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s.Pos = pos
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s.PosMax = max
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return true
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}
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