43 lines
1.2 KiB
Go
43 lines
1.2 KiB
Go
// 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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gast "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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// BlockRenderer represents a renderer for math Blocks
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type BlockRenderer struct{}
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// NewBlockRenderer creates a new renderer for math Blocks
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func NewBlockRenderer() renderer.NodeRenderer {
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return &BlockRenderer{}
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}
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// RegisterFuncs registers the renderer for math Blocks
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func (r *BlockRenderer) RegisterFuncs(reg renderer.NodeRendererFuncRegisterer) {
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reg.Register(KindBlock, r.renderBlock)
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}
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func (r *BlockRenderer) writeLines(w util.BufWriter, source []byte, n gast.Node) {
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l := n.Lines().Len()
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for i := 0; i < l; i++ {
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line := n.Lines().At(i)
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_, _ = w.Write(util.EscapeHTML(line.Value(source)))
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}
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}
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func (r *BlockRenderer) renderBlock(w util.BufWriter, source []byte, node gast.Node, entering bool) (gast.WalkStatus, error) {
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n := node.(*Block)
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if entering {
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_, _ = w.WriteString(`<pre class="code-block is-loading"><code class="chroma language-math display">`)
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r.writeLines(w, source, n)
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} else {
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_, _ = w.WriteString(`</code></pre>` + "\n")
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}
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return gast.WalkContinue, nil
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}
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