// Copyright 2022 The Gitea Authors. All rights reserved. // SPDX-License-Identifier: MIT package math import ( "code.gitea.io/gitea/modules/markup/internal" 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 { renderInternal *internal.RenderInternal } // NewBlockRenderer creates a new renderer for math Blocks func NewBlockRenderer(renderInternal *internal.RenderInternal) renderer.NodeRenderer { return &BlockRenderer{renderInternal: renderInternal} } // 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 { _ = r.renderInternal.FormatWithSafeAttrs(w, `<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 }