3
0
mirror of https://github.com/42wim/matterbridge.git synced 2024-12-23 11:42:37 +01:00
matterbridge/vendor/gitlab.com/golang-commonmark/markdown/replacements.go
Wim 04567c765e
Add support for markdown to HTML conversion (matrix). Closes ()
This uses our own gomatrix lib with the SendHTML function which
adds HTML to formatted_body in matrix.
golang-commonmark is used to convert markdown into valid HTML.
2019-01-06 22:25:19 +01:00

230 lines
3.8 KiB
Go
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

// 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)
}
}
}
}
}
}