modules/markup: Lift out the GitHub callout transformer
This lifts out the GitHub callout transformer from `modules/markup/markdown/goldmark.go` to `callout/github.go`. While there, clean up the transformer code: - Use a map to look up supported callout types, rather than a regexp. - Allow the callout type to be in any case, rather than just uppercase. - Simplified `.Segment.Value()` to `.Text()`. Signed-off-by: Gergely Nagy <forgejo@gergo.csillger.hu>
This commit is contained in:
Gergely Nagy
parent
0b3193bbbe
commit
a177a5c4cb
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@ -181,32 +181,3 @@ func IsColorPreview(node ast.Node) bool {
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_, ok := node.(*ColorPreview)
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return ok
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}
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// Attention is an inline for an attention
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type Attention struct {
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ast.BaseInline
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AttentionType string
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}
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// Dump implements Node.Dump.
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func (n *Attention) Dump(source []byte, level int) {
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m := map[string]string{}
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m["AttentionType"] = n.AttentionType
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ast.DumpHelper(n, source, level, m, nil)
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}
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// KindAttention is the NodeKind for Attention
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var KindAttention = ast.NewNodeKind("Attention")
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// Kind implements Node.Kind.
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func (n *Attention) Kind() ast.NodeKind {
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return KindAttention
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}
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// NewAttention returns a new Attention node.
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func NewAttention(attentionType string) *Attention {
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return &Attention{
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BaseInline: ast.BaseInline{},
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AttentionType: attentionType,
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}
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}
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@ -0,0 +1,37 @@
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// Copyright 2020 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package callout
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import (
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"github.com/yuin/goldmark/ast"
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)
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// Attention is an inline for an attention
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type Attention struct {
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ast.BaseInline
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AttentionType string
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}
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// Dump implements Node.Dump.
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func (n *Attention) Dump(source []byte, level int) {
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m := map[string]string{}
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m["AttentionType"] = n.AttentionType
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ast.DumpHelper(n, source, level, m, nil)
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}
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// KindAttention is the NodeKind for Attention
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var KindAttention = ast.NewNodeKind("Attention")
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// Kind implements Node.Kind.
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func (n *Attention) Kind() ast.NodeKind {
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return KindAttention
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}
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// NewAttention returns a new Attention node.
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func NewAttention(attentionType string) *Attention {
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return &Attention{
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BaseInline: ast.BaseInline{},
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AttentionType: attentionType,
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}
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}
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@ -0,0 +1,142 @@
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// Copyright 2019 The Gitea Authors. All rights reserved.
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// Copyright 2024 The Forgejo Authors c/o Codeberg e.V.. All rights reserved.
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// SPDX-License-Identifier: MIT
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package callout
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import (
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"strings"
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"code.gitea.io/gitea/modules/svg"
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"github.com/yuin/goldmark/ast"
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"github.com/yuin/goldmark/parser"
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"github.com/yuin/goldmark/renderer"
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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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type GitHubCalloutTransformer struct{}
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// Transform transforms the given AST tree.
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func (g *GitHubCalloutTransformer) Transform(node *ast.Document, reader text.Reader, pc parser.Context) {
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supportedAttentionTypes := map[string]bool{
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"note": true,
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"tip": true,
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"important": true,
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"warning": true,
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"caution": true,
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}
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_ = ast.Walk(node, func(n ast.Node, entering bool) (ast.WalkStatus, error) {
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if !entering {
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return ast.WalkContinue, nil
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}
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switch v := n.(type) {
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case *ast.Blockquote:
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// We only want attention blockquotes when the AST looks like:
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// Text: "["
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// Text: "!TYPE"
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// Text(SoftLineBreak): "]"
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// grab these nodes and make sure we adhere to the attention blockquote structure
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firstParagraph := v.FirstChild()
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if firstParagraph.ChildCount() < 3 {
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return ast.WalkContinue, nil
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}
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firstTextNode, ok := firstParagraph.FirstChild().(*ast.Text)
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if !ok || string(firstTextNode.Text(reader.Source())) != "[" {
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return ast.WalkContinue, nil
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}
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secondTextNode, ok := firstTextNode.NextSibling().(*ast.Text)
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if !ok {
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return ast.WalkContinue, nil
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}
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// If the second node's text isn't one of the supported attention
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// types, continue walking.
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secondTextNodeText := secondTextNode.Text(reader.Source())
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attentionType := strings.ToLower(strings.TrimPrefix(string(secondTextNodeText), "!"))
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if _, has := supportedAttentionTypes[attentionType]; !has {
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return ast.WalkContinue, nil
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}
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thirdTextNode, ok := secondTextNode.NextSibling().(*ast.Text)
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if !ok || string(thirdTextNode.Text(reader.Source())) != "]" {
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return ast.WalkContinue, nil
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}
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// color the blockquote
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v.SetAttributeString("class", []byte("gt-py-3 attention attention-"+attentionType))
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// create an emphasis to make it bold
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emphasis := ast.NewEmphasis(2)
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emphasis.SetAttributeString("class", []byte("attention-"+attentionType))
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firstParagraph.InsertBefore(firstParagraph, firstTextNode, emphasis)
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// capitalize first letter
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attentionText := ast.NewString([]byte(strings.ToUpper(string(attentionType[0])) + attentionType[1:]))
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// replace the ![TYPE] with icon+Type
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emphasis.AppendChild(emphasis, attentionText)
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for i := 0; i < 2; i++ {
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lineBreak := ast.NewText()
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lineBreak.SetSoftLineBreak(true)
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firstParagraph.InsertAfter(firstParagraph, emphasis, lineBreak)
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}
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firstParagraph.InsertBefore(firstParagraph, emphasis, NewAttention(attentionType))
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firstParagraph.RemoveChild(firstParagraph, firstTextNode)
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firstParagraph.RemoveChild(firstParagraph, secondTextNode)
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firstParagraph.RemoveChild(firstParagraph, thirdTextNode)
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}
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return ast.WalkContinue, nil
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})
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}
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type GitHubCalloutHTMLRenderer struct {
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html.Config
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}
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// RegisterFuncs implements renderer.NodeRenderer.RegisterFuncs.
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func (r *GitHubCalloutHTMLRenderer) RegisterFuncs(reg renderer.NodeRendererFuncRegisterer) {
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reg.Register(KindAttention, r.renderAttention)
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}
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// renderAttention renders a quote marked with i.e. "> **Note**" or "> **Warning**" with a corresponding svg
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func (r *GitHubCalloutHTMLRenderer) renderAttention(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
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if entering {
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_, _ = w.WriteString(`<span class="gt-mr-2 gt-vm attention-`)
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n := node.(*Attention)
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_, _ = w.WriteString(strings.ToLower(n.AttentionType))
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_, _ = w.WriteString(`">`)
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var octiconType string
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switch n.AttentionType {
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case "note":
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octiconType = "info"
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case "tip":
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octiconType = "light-bulb"
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case "important":
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octiconType = "report"
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case "warning":
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octiconType = "alert"
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case "caution":
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octiconType = "stop"
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}
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_, _ = w.WriteString(string(svg.RenderHTML("octicon-" + octiconType)))
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} else {
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_, _ = w.WriteString("</span>\n")
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}
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return ast.WalkContinue, nil
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}
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func NewGitHubCalloutHTMLRenderer(opts ...html.Option) renderer.NodeRenderer {
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r := &GitHubCalloutHTMLRenderer{
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Config: html.NewConfig(),
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}
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for _, opt := range opts {
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opt.SetHTMLOption(&r.Config)
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}
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return r
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}
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@ -13,7 +13,6 @@ import (
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"code.gitea.io/gitea/modules/markup"
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"code.gitea.io/gitea/modules/markup/common"
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"code.gitea.io/gitea/modules/setting"
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"code.gitea.io/gitea/modules/svg"
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giteautil "code.gitea.io/gitea/modules/util"
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"github.com/microcosm-cc/bluemonday/css"
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@ -196,55 +195,6 @@ func (g *ASTTransformer) Transform(node *ast.Document, reader text.Reader, pc pa
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if css.ColorHandler(strings.ToLower(string(colorContent))) {
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v.AppendChild(v, NewColorPreview(colorContent))
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}
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case *ast.Blockquote:
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// We only want attention blockquotes when the AST looks like:
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// Text: "["
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// Text: "!TYPE"
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// Text(SoftLineBreak): "]"
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// grab these nodes and make sure we adhere to the attention blockquote structure
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firstParagraph := v.FirstChild()
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if firstParagraph.ChildCount() < 3 {
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return ast.WalkContinue, nil
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}
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firstTextNode, ok := firstParagraph.FirstChild().(*ast.Text)
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if !ok || string(firstTextNode.Segment.Value(reader.Source())) != "[" {
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return ast.WalkContinue, nil
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}
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secondTextNode, ok := firstTextNode.NextSibling().(*ast.Text)
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if !ok || !attentionTypeRE.MatchString(string(secondTextNode.Segment.Value(reader.Source()))) {
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return ast.WalkContinue, nil
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}
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thirdTextNode, ok := secondTextNode.NextSibling().(*ast.Text)
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if !ok || string(thirdTextNode.Segment.Value(reader.Source())) != "]" {
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return ast.WalkContinue, nil
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}
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// grab attention type from markdown source
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attentionType := strings.ToLower(strings.TrimPrefix(string(secondTextNode.Segment.Value(reader.Source())), "!"))
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// color the blockquote
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v.SetAttributeString("class", []byte("gt-py-3 attention attention-"+attentionType))
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// create an emphasis to make it bold
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emphasis := ast.NewEmphasis(2)
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emphasis.SetAttributeString("class", []byte("attention-"+attentionType))
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firstParagraph.InsertBefore(firstParagraph, firstTextNode, emphasis)
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// capitalize first letter
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attentionText := ast.NewString([]byte(strings.ToUpper(string(attentionType[0])) + attentionType[1:]))
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// replace the ![TYPE] with icon+Type
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emphasis.AppendChild(emphasis, attentionText)
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for i := 0; i < 2; i++ {
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lineBreak := ast.NewText()
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lineBreak.SetSoftLineBreak(true)
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firstParagraph.InsertAfter(firstParagraph, emphasis, lineBreak)
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}
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firstParagraph.InsertBefore(firstParagraph, emphasis, NewAttention(attentionType))
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firstParagraph.RemoveChild(firstParagraph, firstTextNode)
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firstParagraph.RemoveChild(firstParagraph, secondTextNode)
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firstParagraph.RemoveChild(firstParagraph, thirdTextNode)
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}
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return ast.WalkContinue, nil
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})
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@ -335,7 +285,6 @@ func (r *HTMLRenderer) RegisterFuncs(reg renderer.NodeRendererFuncRegisterer) {
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reg.Register(KindSummary, r.renderSummary)
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reg.Register(KindIcon, r.renderIcon)
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reg.Register(ast.KindCodeSpan, r.renderCodeSpan)
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reg.Register(KindAttention, r.renderAttention)
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reg.Register(KindTaskCheckBoxListItem, r.renderTaskCheckBoxListItem)
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reg.Register(east.KindTaskCheckBox, r.renderTaskCheckBox)
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}
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@ -372,34 +321,6 @@ func (r *HTMLRenderer) renderCodeSpan(w util.BufWriter, source []byte, n ast.Nod
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return ast.WalkContinue, nil
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}
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// renderAttention renders a quote marked with i.e. "> **Note**" or "> **Warning**" with a corresponding svg
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func (r *HTMLRenderer) renderAttention(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
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if entering {
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_, _ = w.WriteString(`<span class="gt-mr-2 gt-vm attention-`)
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n := node.(*Attention)
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_, _ = w.WriteString(strings.ToLower(n.AttentionType))
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_, _ = w.WriteString(`">`)
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var octiconType string
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switch n.AttentionType {
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case "note":
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octiconType = "info"
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case "tip":
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octiconType = "light-bulb"
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case "important":
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octiconType = "report"
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case "warning":
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octiconType = "alert"
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case "caution":
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octiconType = "stop"
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}
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_, _ = w.WriteString(string(svg.RenderHTML("octicon-" + octiconType)))
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} else {
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_, _ = w.WriteString("</span>\n")
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}
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return ast.WalkContinue, nil
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}
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func (r *HTMLRenderer) renderDocument(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
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n := node.(*ast.Document)
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@ -459,10 +380,7 @@ func (r *HTMLRenderer) renderSummary(w util.BufWriter, source []byte, node ast.N
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return ast.WalkContinue, nil
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}
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var (
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validNameRE = regexp.MustCompile("^[a-z ]+$")
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attentionTypeRE = regexp.MustCompile("^!(NOTE|TIP|IMPORTANT|WARNING|CAUTION)$")
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)
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var validNameRE = regexp.MustCompile("^[a-z ]+$")
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func (r *HTMLRenderer) renderIcon(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
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if !entering {
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@ -13,6 +13,7 @@ import (
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/markup"
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"code.gitea.io/gitea/modules/markup/common"
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"code.gitea.io/gitea/modules/markup/markdown/callout"
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"code.gitea.io/gitea/modules/markup/markdown/math"
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"code.gitea.io/gitea/modules/setting"
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giteautil "code.gitea.io/gitea/modules/util"
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@ -124,6 +125,7 @@ func SpecializedMarkdown() goldmark.Markdown {
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parser.WithAttribute(),
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parser.WithAutoHeadingID(),
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parser.WithASTTransformers(
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util.Prioritized(&callout.GitHubCalloutTransformer{}, 9000),
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util.Prioritized(&ASTTransformer{}, 10000),
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),
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),
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@ -135,6 +137,7 @@ func SpecializedMarkdown() goldmark.Markdown {
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// Override the original Tasklist renderer!
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specMarkdown.Renderer().AddOptions(
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renderer.WithNodeRenderers(
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util.Prioritized(callout.NewGitHubCalloutHTMLRenderer(), 10),
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util.Prioritized(NewHTMLRenderer(), 10),
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),
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)
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