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zeekayandHanzo Dev
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Source files keep their SPDX-License-Identifier and Hanzo copyright line; the Gitea, Gogs and LFS Test Server copyrights they used to repeat now live once in NOTICE, alongside LICENSE. The header lint accepts any copyright line above the SPDX line, so it no longer demands an upstream one. Co-authored-by: Hanzo Dev <[email protected]>
79 lines
2.2 KiB
Go
79 lines
2.2 KiB
Go
// Copyright 2026 Hanzo AI, Inc. All rights reserved.
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// SPDX-License-Identifier: MIT
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package markdown
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import (
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"bytes"
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"strings"
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"github.com/hanzoai/git/modules/markup"
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"github.com/microcosm-cc/bluemonday/css"
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"github.com/yuin/goldmark/ast"
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"github.com/yuin/goldmark/renderer/html"
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"github.com/yuin/goldmark/text"
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"github.com/yuin/goldmark/util"
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)
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// renderCodeSpan renders CodeSpan elements (like goldmark upstream does) but also renders ColorPreview elements.
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// See #21474 for reference
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func (r *HTMLRenderer) renderCodeSpan(w util.BufWriter, source []byte, n ast.Node, entering bool) (ast.WalkStatus, error) {
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if entering {
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if n.Attributes() != nil {
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_, _ = w.WriteString("<code")
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html.RenderAttributes(w, n, html.CodeAttributeFilter)
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_ = w.WriteByte('>')
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} else {
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_, _ = w.WriteString("<code>")
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}
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for c := n.FirstChild(); c != nil; c = c.NextSibling() {
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switch v := c.(type) {
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case *ast.Text:
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segment := v.Segment
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value := segment.Value(source)
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if bytes.HasSuffix(value, []byte("\n")) {
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r.Writer.RawWrite(w, value[:len(value)-1])
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r.Writer.RawWrite(w, []byte(" "))
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} else {
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r.Writer.RawWrite(w, value)
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}
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case *ColorPreview:
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_ = r.renderInternal.FormatWithSafeAttrs(w, `<span class="color-preview" style="background-color: %s"></span>`, v.Color)
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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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// cssColorHandler checks if a string is a render-able CSS color value.
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// The code is from "github.com/microcosm-cc/bluemonday/css.ColorHandler", except that it doesn't handle color words like "red".
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func cssColorHandler(value string) bool {
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value = strings.ToLower(value)
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if css.HexRGB.MatchString(value) {
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return true
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}
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if css.RGB.MatchString(value) {
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return true
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}
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if css.RGBA.MatchString(value) {
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return true
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}
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if css.HSL.MatchString(value) {
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return true
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}
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return css.HSLA.MatchString(value)
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}
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func (g *ASTTransformer) transformCodeSpan(_ *markup.RenderContext, v *ast.CodeSpan, reader text.Reader) {
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colorContent, ok := childSingleText(v, reader.Source())
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if !ok {
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return
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}
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if cssColorHandler(colorContent) {
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v.AppendChild(v, NewColorPreview(colorContent))
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}
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}
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