165 lines
2.1 KiB
Go
165 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 parseLinkLabel(s *StateInline, start int, disableNested bool) int {
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src := s.Src
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labelEnd := -1
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max := s.PosMax
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oldPos := s.Pos
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s.Pos = start + 1
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level := 1
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found := false
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for s.Pos < max {
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marker := src[s.Pos]
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if marker == ']' {
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level--
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if level == 0 {
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found = true
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break
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}
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}
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prevPos := s.Pos
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s.Md.Inline.SkipToken(s)
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if marker == '[' {
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if prevPos == s.Pos-1 {
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level++
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} else if disableNested {
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s.Pos = oldPos
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return -1
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}
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}
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}
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if found {
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labelEnd = s.Pos
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}
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s.Pos = oldPos
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return labelEnd
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}
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func parseLinkDestination(s string, pos, max int) (url string, lines, endpos int, ok bool) {
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start := pos
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if pos < max && s[pos] == '<' {
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pos++
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for pos < max {
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b := s[pos]
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if b == '\n' || byteIsSpace(b) {
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return
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}
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if b == '>' {
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endpos = pos + 1
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url = unescapeAll(s[start+1 : pos])
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ok = true
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return
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}
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if b == '\\' && pos+1 < max {
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pos += 2
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continue
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}
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pos++
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}
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return
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}
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level := 0
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for pos < max {
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b := s[pos]
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if b == ' ' {
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break
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}
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if b < 0x20 || b == 0x7f {
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break
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}
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if b == '\\' && pos+1 < max {
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pos += 2
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continue
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}
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if b == '(' {
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level++
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}
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if b == ')' {
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if level == 0 {
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break
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}
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level--
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}
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pos++
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}
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if start == pos {
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return
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}
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if level != 0 {
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return
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}
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url = unescapeAll(s[start:pos])
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endpos = pos
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ok = true
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return
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}
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func parseLinkTitle(s string, pos, max int) (title string, nlines, endpos int, ok bool) {
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lines := 0
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start := pos
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if pos >= max {
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return
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}
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marker := s[pos]
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if marker != '"' && marker != '\'' && marker != '(' {
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return
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}
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pos++
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if marker == '(' {
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marker = ')'
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}
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for pos < max {
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switch s[pos] {
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case marker:
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endpos = pos + 1
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nlines = lines
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title = unescapeAll(s[start+1 : pos])
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ok = true
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return
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case '\n':
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lines++
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case '\\':
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if pos+1 < max {
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pos++
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if s[pos] == '\n' {
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lines++
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}
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}
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}
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pos++
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}
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return
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}
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