gotosocial/vendor/github.com/yuin/goldmark/extension/cjk.go
dependabot[bot] 2a4b26ed20
[chore]: Bump github.com/yuin/goldmark from 1.5.6 to 1.6.0 (#2318)
Bumps [github.com/yuin/goldmark](https://github.com/yuin/goldmark) from 1.5.6 to 1.6.0.
- [Release notes](https://github.com/yuin/goldmark/releases)
- [Commits](https://github.com/yuin/goldmark/compare/v1.5.6...v1.6.0)

---
updated-dependencies:
- dependency-name: github.com/yuin/goldmark
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
2023-10-30 11:07:17 +01:00

72 lines
2.1 KiB
Go

package extension
import (
"github.com/yuin/goldmark"
"github.com/yuin/goldmark/parser"
"github.com/yuin/goldmark/renderer/html"
)
// A CJKOption sets options for CJK support mostly for HTML based renderers.
type CJKOption func(*cjk)
// A EastAsianLineBreaks is a style of east asian line breaks.
type EastAsianLineBreaks int
const (
//EastAsianLineBreaksNone renders line breaks as it is.
EastAsianLineBreaksNone EastAsianLineBreaks = iota
// EastAsianLineBreaksSimple is a style where soft line breaks are ignored
// if both sides of the break are east asian wide characters.
EastAsianLineBreaksSimple
// EastAsianLineBreaksCSS3Draft is a style where soft line breaks are ignored
// even if only one side of the break is an east asian wide character.
EastAsianLineBreaksCSS3Draft
)
// WithEastAsianLineBreaks is a functional option that indicates whether softline breaks
// between east asian wide characters should be ignored.
// style defauts to [EastAsianLineBreaksSimple] .
func WithEastAsianLineBreaks(style ...EastAsianLineBreaks) CJKOption {
return func(c *cjk) {
if len(style) == 0 {
c.EastAsianLineBreaks = EastAsianLineBreaksSimple
return
}
c.EastAsianLineBreaks = style[0]
}
}
// WithEscapedSpace is a functional option that indicates that a '\' escaped half-space(0x20) should not be rendered.
func WithEscapedSpace() CJKOption {
return func(c *cjk) {
c.EscapedSpace = true
}
}
type cjk struct {
EastAsianLineBreaks EastAsianLineBreaks
EscapedSpace bool
}
// CJK is a goldmark extension that provides functionalities for CJK languages.
var CJK = NewCJK(WithEastAsianLineBreaks(), WithEscapedSpace())
// NewCJK returns a new extension with given options.
func NewCJK(opts ...CJKOption) goldmark.Extender {
e := &cjk{
EastAsianLineBreaks: EastAsianLineBreaksNone,
}
for _, opt := range opts {
opt(e)
}
return e
}
func (e *cjk) Extend(m goldmark.Markdown) {
m.Renderer().AddOptions(html.WithEastAsianLineBreaks(
html.EastAsianLineBreaks(e.EastAsianLineBreaks)))
if e.EscapedSpace {
m.Renderer().AddOptions(html.WithWriter(html.NewWriter(html.WithEscapedSpace())))
m.Parser().AddOptions(parser.WithEscapedSpace())
}
}