gotosocial/vendor/github.com/yuin/goldmark/extension/cjk.go
Autumn! eb08529f35
[chore/bugfix] Switch markdown from blackfriday to goldmark (#1267)
Co-authored-by: Autumn! <autumnull@posteo.net>
2022-12-16 12:20:22 +01:00

51 lines
1.3 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)
// WithEastAsianLineBreaks is a functional option that indicates whether softline breaks
// between east asian wide characters should be ignored.
func WithEastAsianLineBreaks() CJKOption {
return func(c *cjk) {
c.EastAsianLineBreaks = true
}
}
// 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 bool
EscapedSpace bool
}
var CJK = NewCJK(WithEastAsianLineBreaks(), WithEscapedSpace())
// NewCJK returns a new extension with given options.
func NewCJK(opts ...CJKOption) goldmark.Extender {
e := &cjk{}
for _, opt := range opts {
opt(e)
}
return e
}
func (e *cjk) Extend(m goldmark.Markdown) {
if e.EastAsianLineBreaks {
m.Renderer().AddOptions(html.WithEastAsianLineBreaks())
}
if e.EscapedSpace {
m.Renderer().AddOptions(html.WithWriter(html.NewWriter(html.WithEscapedSpace())))
m.Parser().AddOptions(parser.WithEscapedSpace())
}
}