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// Copyright 2022 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package math
import (
gast "github.com/yuin/goldmark/ast"
"github.com/yuin/goldmark/renderer"
"github.com/yuin/goldmark/util"
)
// BlockRenderer represents a renderer for math Blocks
type BlockRenderer struct{}
// NewBlockRenderer creates a new renderer for math Blocks
func NewBlockRenderer() renderer.NodeRenderer {
return &BlockRenderer{}
}
// RegisterFuncs registers the renderer for math Blocks
func (r *BlockRenderer) RegisterFuncs(reg renderer.NodeRendererFuncRegisterer) {
reg.Register(KindBlock, r.renderBlock)
}
func (r *BlockRenderer) writeLines(w util.BufWriter, source []byte, n gast.Node) {
l := n.Lines().Len()
for i := 0; i < l; i++ {
line := n.Lines().At(i)
_, _ = w.Write(util.EscapeHTML(line.Value(source)))
}
}
func (r *BlockRenderer) renderBlock(w util.BufWriter, source []byte, node gast.Node, entering bool) (gast.WalkStatus, error) {
n := node.(*Block)
if entering {
_, _ = w.WriteString(`<pre class="code-block is-loading"><code class="chroma language-math display">`)
r.writeLines(w, source, n)
} else {
_, _ = w.WriteString(`</code></pre>` + "\n")
}
return gast.WalkContinue, nil
}
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