diff options
Diffstat (limited to 'vendor/gitlab.com/golang-commonmark/markdown/replacements.go')
| -rw-r--r-- | vendor/gitlab.com/golang-commonmark/markdown/replacements.go | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/vendor/gitlab.com/golang-commonmark/markdown/replacements.go b/vendor/gitlab.com/golang-commonmark/markdown/replacements.go new file mode 100644 index 00000000..8d67af6e --- /dev/null +++ b/vendor/gitlab.com/golang-commonmark/markdown/replacements.go @@ -0,0 +1,229 @@ +// 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 "strings" + +func exclquest(b byte) bool { + return b == '!' || b == '?' +} + +func byteToLower(b byte) byte { + if b >= 'A' && b <= 'Z' { + return b - 'A' + 'a' + } + return b +} + +var replChar = [256]bool{ + '(': true, + '!': true, + '+': true, + ',': true, + '-': true, + '.': true, + '?': true, +} + +func performReplacements(s string) string { + var ss []string + + start := 0 + for i := 0; i < len(s); i++ { + b := s[i] + + if replChar[b] { + + outer: + switch b { + case '(': + if i+2 >= len(s) { + break + } + + b2 := s[i+1] + + b2 = byteToLower(b2) + switch b2 { + case 'c', 'r', 'p': + if s[i+2] != ')' { + break outer + } + switch b2 { + case 'c': + if start < i { + ss = append(ss, s[start:i]) + } + ss = append(ss, "©") + case 'r': + if start < i { + ss = append(ss, s[start:i]) + } + ss = append(ss, "®") + case 'p': + if start < i { + ss = append(ss, s[start:i]) + } + ss = append(ss, "§") + } + i += 2 + start = i + 1 + continue + + case 't': + if i+3 >= len(s) { + break outer + } + if s[i+3] != ')' || byteToLower(s[i+2]) != 'm' { + break outer + } + if start < i { + ss = append(ss, s[start:i]) + } + ss = append(ss, "™") + i += 3 + start = i + 1 + continue + default: + break outer + } + + case '+': + if i+1 >= len(s) || s[i+1] != '-' { + break + } + if start < i { + ss = append(ss, s[start:i]) + } + ss = append(ss, "±") + i++ + start = i + 1 + continue + + case '.': + if i+1 >= len(s) || s[i+1] != '.' { + break + } + + j := i + 2 + for j < len(s) && s[j] == '.' { + j++ + } + if start < i { + ss = append(ss, s[start:i]) + } + if i == 0 || !(s[i-1] == '?' || s[i-1] == '!') { + ss = append(ss, "…") + } else { + ss = append(ss, "..") + } + i = j - 1 + start = i + 1 + continue + + case '?', '!': + if i+3 >= len(s) { + break + } + if !(exclquest(s[i+1]) && exclquest(s[i+2]) && exclquest(s[i+3])) { + break + } + if start < i { + ss = append(ss, s[start:i]) + } + ss = append(ss, s[i:i+3]) + j := i + 3 + for j < len(s) && exclquest(s[j]) { + j++ + } + i = j - 1 + start = i + 1 + continue + + case ',': + if i+1 >= len(s) || s[i+1] != ',' { + break + } + if start < i { + ss = append(ss, s[start:i]) + } + ss = append(ss, ",") + j := i + 2 + for j < len(s) && s[j] == ',' { + j++ + } + i = j - 1 + start = i + 1 + continue + + case '-': + if i+1 >= len(s) || s[i+1] != '-' { + break + } + if i+2 >= len(s) || s[i+2] != '-' { + if start < i { + ss = append(ss, s[start:i]) + } + ss = append(ss, "–") + i++ + start = i + 1 + continue + } + if i+3 >= len(s) || s[i+3] != '-' { + if start < i { + ss = append(ss, s[start:i]) + } + ss = append(ss, "—") + i += 2 + start = i + 1 + continue + } + + j := i + 3 + for j < len(s) && s[j] == '-' { + j++ + } + if start < i { + ss = append(ss, s[start:i]) + } + ss = append(ss, s[i:j]) + i = j - 1 + start = i + 1 + continue + } + } + } + if ss == nil { + return s + } + if start < len(s) { + ss = append(ss, s[start:]) + } + return strings.Join(ss, "") +} + +func ruleReplacements(s *StateCore) { + if !s.Md.Typographer { + return + } + + insideLink := false + for _, tok := range s.Tokens { + if tok, ok := tok.(*Inline); ok { + for _, itok := range tok.Children { + switch itok := itok.(type) { + case *LinkOpen: + insideLink = true + case *LinkClose: + insideLink = false + case *Text: + if !insideLink { + itok.Content = performReplacements(itok.Content) + } + } + } + } + } +} |