/
render.go
50 lines (44 loc) · 1.33 KB
/
render.go
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package links
import (
"github.com/yuin/goldmark/ast"
"github.com/yuin/goldmark/renderer"
"github.com/yuin/goldmark/renderer/html"
"github.com/yuin/goldmark/util"
)
// Renderer struct is a renderer.NodeRenderer implementation for the extension.
type Renderer struct {
html.Config
}
// NewRenderer builds a new Renderer with given options and returns it.
func NewRenderer() renderer.NodeRenderer {
return &Renderer{}
}
// RegisterFuncs implements NodeRenderer.RegisterFuncs interface.
func (r *Renderer) RegisterFuncs(reg renderer.NodeRendererFuncRegisterer) {
reg.Register(KindLink, r.renderLink)
}
func (r *Renderer) renderLink(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
n := node.(*Link)
for k, v := range extender.Attribute {
n.SetAttributeString(k, util.StringToReadOnlyBytes(v))
}
if entering {
_, _ = w.WriteString("<a href=\"")
if r.Unsafe || !html.IsDangerousURL(n.Destination) {
_, _ = w.Write(util.EscapeHTML(util.URLEscape(n.Destination, true)))
}
_ = w.WriteByte('"')
if n.Title != nil {
_, _ = w.WriteString(` title="`)
r.Writer.Write(w, n.Title)
_ = w.WriteByte('"')
}
if n.Attributes() != nil {
html.RenderAttributes(w, n, html.LinkAttributeFilter)
}
_ = w.WriteByte('>')
} else {
_, _ = w.WriteString("</a>")
}
return ast.WalkContinue, nil
}