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