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// Copyright 2022 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package math
import (
"bytes"
"github.com/yuin/goldmark/ast"
"github.com/yuin/goldmark/renderer"
"github.com/yuin/goldmark/util"
)
// InlineRenderer is an inline renderer
type InlineRenderer struct{}
// NewInlineRenderer returns a new renderer for inline math
func NewInlineRenderer() renderer.NodeRenderer {
return &InlineRenderer{}
}
func (r *InlineRenderer) renderInline(w util.BufWriter, source []byte, n ast.Node, entering bool) (ast.WalkStatus, error) {
if entering {
extraClass := ""
if _, ok := n.(*InlineBlock); ok {
extraClass = "display "
}
_, _ = w.WriteString(`<code class="language-math ` + extraClass + `is-loading">`)
for c := n.FirstChild(); c != nil; c = c.NextSibling() {
segment := c.(*ast.Text).Segment
value := util.EscapeHTML(segment.Value(source))
if bytes.HasSuffix(value, []byte("\n")) {
_, _ = w.Write(value[:len(value)-1])
if c != n.LastChild() {
_, _ = w.Write([]byte(" "))
}
} else {
_, _ = w.Write(value)
}
}
return ast.WalkSkipChildren, nil
}
_, _ = w.WriteString(`</code>`)
return ast.WalkContinue, nil
}
// RegisterFuncs registers the renderer for inline math nodes
func (r *InlineRenderer) RegisterFuncs(reg renderer.NodeRendererFuncRegisterer) {
reg.Register(KindInline, r.renderInline)
reg.Register(KindInlineBlock, r.renderInline)
}
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