Monorepo for Tangled
appview/pages/markup: add Dashes extension and export NewMarkdownWith
Signed-off-by: Anirudh Oppiliappan <anirudh@tangled.org>
authored by
Anirudh Oppiliappan
and committed by
tangled.org
(Mar 18, 2026, 12:27 PM UTC)
260976e4
31a71987
+93
-22
+64
appview/pages/markup/extension/dashes.go
+64
appview/pages/markup/extension/dashes.go
···
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package extension
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import (
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"github.com/yuin/goldmark"
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gast "github.com/yuin/goldmark/ast"
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"github.com/yuin/goldmark/parser"
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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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type dashParser struct{}
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func (p *dashParser) Trigger() []byte {
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return []byte{'-'}
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}
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func (p *dashParser) Parse(parent gast.Node, block text.Reader, pc parser.Context) gast.Node {
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line, _ := block.PeekLine()
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if len(line) < 2 || line[0] != '-' || line[1] != '-' {
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return nil
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}
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node := gast.NewString([]byte("\u2014"))
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node.SetCode(true)
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block.Advance(2)
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return node
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}
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type digitDashParser struct{}
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func (p *digitDashParser) Trigger() []byte {
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return []byte{'-'}
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}
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func (p *digitDashParser) Parse(parent gast.Node, block text.Reader, pc parser.Context) gast.Node {
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line, _ := block.PeekLine()
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if len(line) < 2 {
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return nil
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}
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before := block.PrecendingCharacter()
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if before < '0' || before > '9' {
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return nil
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}
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if line[1] < '0' || line[1] > '9' {
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return nil
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}
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node := gast.NewString([]byte("\u2013"))
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node.SetCode(true)
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block.Advance(1)
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return node
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}
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type dashExt struct{}
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// Dashes replaces "--" with an em-dash (—) and a hyphen between two digits
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// with an en-dash (–). Implemented as an inline parser so it operates on the
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// raw byte stream, unaffected by hard-wrapped source lines.
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var Dashes goldmark.Extender = &dashExt{}
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func (e *dashExt) Extend(m goldmark.Markdown) {
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m.Parser().AddOptions(parser.WithInlineParsers(
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util.Prioritized(&dashParser{}, 9990),
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util.Prioritized(&digitDashParser{}, 9991),
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))
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}
+29
-22
appview/pages/markup/markdown.go
+29
-22
appview/pages/markup/markdown.go
···
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chromahtml "github.com/alecthomas/chroma/v2/formatters/html"
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"github.com/alecthomas/chroma/v2/styles"
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"github.com/yuin/goldmark"
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"github.com/yuin/goldmark-emoji"
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emoji "github.com/yuin/goldmark-emoji"
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highlighting "github.com/yuin/goldmark-highlighting/v2"
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"github.com/yuin/goldmark/ast"
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"github.com/yuin/goldmark/extension"
···
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Files fs.FS
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}
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func NewMarkdown(hostname string) goldmark.Markdown {
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md := goldmark.New(
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goldmark.WithExtensions(
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extension.GFM,
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&mermaid.Extender{
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RenderMode: mermaid.RenderModeClient,
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NoScript: true,
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},
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highlighting.NewHighlighting(
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highlighting.WithFormatOptions(
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chromahtml.Standalone(false),
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chromahtml.WithClasses(true),
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),
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highlighting.WithCustomStyle(styles.Get("catppuccin-latte")),
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func NewMarkdown(hostname string, extra ...goldmark.Extender) goldmark.Markdown {
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exts := []goldmark.Extender{
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extension.GFM,
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&mermaid.Extender{
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RenderMode: mermaid.RenderModeClient,
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NoScript: true,
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},
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highlighting.NewHighlighting(
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highlighting.WithFormatOptions(
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chromahtml.Standalone(false),
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chromahtml.WithClasses(true),
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),
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extension.NewFootnote(
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extension.WithFootnoteIDPrefix([]byte("footnote")),
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),
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callout.CalloutExtention,
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textension.AtExt,
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textension.NewTangledLinkExt(hostname),
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emoji.Emoji,
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highlighting.WithCustomStyle(styles.Get("catppuccin-latte")),
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),
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extension.NewFootnote(
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extension.WithFootnoteIDPrefix([]byte("footnote")),
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),
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callout.CalloutExtention,
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textension.AtExt,
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textension.NewTangledLinkExt(hostname),
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emoji.Emoji,
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}
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exts = append(exts, extra...)
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md := goldmark.New(
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goldmark.WithExtensions(exts...),
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goldmark.WithParserOptions(
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parser.WithAutoHeadingID(),
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),
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goldmark.WithRendererOptions(html.WithUnsafe()),
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)
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return md
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}
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// NewMarkdownWith is an alias for NewMarkdown with extra extensions.
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func NewMarkdownWith(hostname string, extra ...goldmark.Extender) goldmark.Markdown {
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return NewMarkdown(hostname, extra...)
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}
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func (rctx *RenderContext) RenderMarkdown(source string) string {