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https://github.com/go-gitea/gitea
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Refactor markdown attention render (#29984)
Follow #29833 and add tests
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6845717158
commit
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@ -27,7 +27,21 @@ import (
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)
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// ASTTransformer is a default transformer of the goldmark tree.
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type ASTTransformer struct{}
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type ASTTransformer struct {
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AttentionTypes container.Set[string]
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}
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func NewASTTransformer() *ASTTransformer {
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return &ASTTransformer{
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AttentionTypes: container.SetOf("note", "tip", "important", "warning", "caution"),
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}
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}
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func (g *ASTTransformer) applyElementDir(n ast.Node) {
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if markup.DefaultProcessorHelper.ElementDir != "" {
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n.SetAttributeString("dir", []byte(markup.DefaultProcessorHelper.ElementDir))
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}
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}
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// Transform transforms the given AST tree.
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func (g *ASTTransformer) Transform(node *ast.Document, reader text.Reader, pc parser.Context) {
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@ -45,12 +59,6 @@ func (g *ASTTransformer) Transform(node *ast.Document, reader text.Reader, pc pa
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tocMode = rc.TOC
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}
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applyElementDir := func(n ast.Node) {
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if markup.DefaultProcessorHelper.ElementDir != "" {
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n.SetAttributeString("dir", []byte(markup.DefaultProcessorHelper.ElementDir))
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}
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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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@ -72,9 +80,9 @@ func (g *ASTTransformer) Transform(node *ast.Document, reader text.Reader, pc pa
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header.ID = util.BytesToReadOnlyString(id.([]byte))
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}
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tocList = append(tocList, header)
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applyElementDir(v)
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g.applyElementDir(v)
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case *ast.Paragraph:
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applyElementDir(v)
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g.applyElementDir(v)
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case *ast.Image:
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// Images need two things:
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//
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@ -174,7 +182,7 @@ func (g *ASTTransformer) Transform(node *ast.Document, reader text.Reader, pc pa
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v.AppendChild(v, newChild)
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}
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}
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applyElementDir(v)
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g.applyElementDir(v)
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case *ast.Text:
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if v.SoftLineBreak() && !v.HardLineBreak() {
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if ctx.Metas["mode"] != "document" {
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@ -189,51 +197,7 @@ func (g *ASTTransformer) Transform(node *ast.Document, reader text.Reader, pc pa
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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("attention-header attention-"+attentionType))
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// create an emphasis to make it bold
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attentionParagraph := ast.NewParagraph()
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emphasis := ast.NewEmphasis(2)
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emphasis.SetAttributeString("class", []byte("attention-"+attentionType))
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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 a dedicated paragraph of icon+Type
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emphasis.AppendChild(emphasis, attentionText)
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attentionParagraph.AppendChild(attentionParagraph, NewAttention(attentionType))
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attentionParagraph.AppendChild(attentionParagraph, emphasis)
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firstParagraph.Parent().InsertBefore(firstParagraph.Parent(), firstParagraph, attentionParagraph)
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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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return g.transformBlockquote(v, reader)
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}
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return ast.WalkContinue, nil
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})
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@ -268,7 +232,7 @@ func (p *prefixedIDs) Generate(value []byte, kind ast.NodeKind) []byte {
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return p.GenerateWithDefault(value, dft)
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}
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// Generate generates a new element id.
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// GenerateWithDefault generates a new element id.
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func (p *prefixedIDs) GenerateWithDefault(value, dft []byte) []byte {
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result := common.CleanValue(value)
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if len(result) == 0 {
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@ -303,7 +267,8 @@ func newPrefixedIDs() *prefixedIDs {
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// in the gitea form.
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func NewHTMLRenderer(opts ...html.Option) renderer.NodeRenderer {
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r := &HTMLRenderer{
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Config: html.NewConfig(),
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Config: html.NewConfig(),
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reValidName: regexp.MustCompile("^[a-z ]+$"),
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}
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for _, opt := range opts {
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opt.SetHTMLOption(&r.Config)
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@ -315,6 +280,7 @@ func NewHTMLRenderer(opts ...html.Option) renderer.NodeRenderer {
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// renders gitea specific features.
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type HTMLRenderer struct {
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html.Config
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reValidName *regexp.Regexp
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}
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// RegisterFuncs implements renderer.NodeRenderer.RegisterFuncs.
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@ -442,11 +408,6 @@ func (r *HTMLRenderer) renderSummary(w util.BufWriter, source []byte, node ast.N
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return ast.WalkContinue, nil
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}
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var (
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validNameRE = regexp.MustCompile("^[a-z ]+$")
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attentionTypeRE = regexp.MustCompile("^!(NOTE|TIP|IMPORTANT|WARNING|CAUTION)$")
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)
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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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return ast.WalkContinue, nil
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@ -461,7 +422,7 @@ func (r *HTMLRenderer) renderIcon(w util.BufWriter, source []byte, node ast.Node
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return ast.WalkContinue, nil
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}
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if !validNameRE.MatchString(name) {
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if !r.reValidName.MatchString(name) {
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// skip this
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return ast.WalkContinue, nil
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}
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@ -126,7 +126,7 @@ 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(&ASTTransformer{}, 10000),
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util.Prioritized(NewASTTransformer(), 10000),
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),
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),
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goldmark.WithRendererOptions(
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@ -16,9 +16,12 @@ import (
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"code.gitea.io/gitea/modules/markup"
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"code.gitea.io/gitea/modules/markup/markdown"
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"code.gitea.io/gitea/modules/setting"
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"code.gitea.io/gitea/modules/svg"
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"code.gitea.io/gitea/modules/util"
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"github.com/stretchr/testify/assert"
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"golang.org/x/text/cases"
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"golang.org/x/text/language"
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)
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const (
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@ -957,3 +960,36 @@ space</p>
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assert.Equal(t, template.HTML(c.Expected), result, "Unexpected result in testcase %v", i)
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}
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}
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func TestAttention(t *testing.T) {
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defer svg.MockIcon("octicon-info")()
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defer svg.MockIcon("octicon-light-bulb")()
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defer svg.MockIcon("octicon-report")()
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defer svg.MockIcon("octicon-alert")()
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defer svg.MockIcon("octicon-stop")()
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renderAttention := func(attention, icon string) string {
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tmpl := `<blockquote class="attention-header attention-{attention}"><p><svg class="attention-icon attention-{attention} svg {icon}" width="16" height="16"></svg><strong class="attention-{attention}">{Attention}</strong></p>`
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tmpl = strings.ReplaceAll(tmpl, "{attention}", attention)
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tmpl = strings.ReplaceAll(tmpl, "{icon}", icon)
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tmpl = strings.ReplaceAll(tmpl, "{Attention}", cases.Title(language.English).String(attention))
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return tmpl
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}
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test := func(input, expected string) {
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result, err := markdown.RenderString(&markup.RenderContext{Ctx: context.Background()}, input)
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assert.NoError(t, err)
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assert.Equal(t, strings.TrimSpace(expected), strings.TrimSpace(string(result)))
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}
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test(`
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> [!NOTE]
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> text
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`, renderAttention("note", "octicon-info")+"\n<p>text</p>\n</blockquote>")
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test(`> [!note]`, renderAttention("note", "octicon-info")+"\n</blockquote>")
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test(`> [!tip]`, renderAttention("tip", "octicon-light-bulb")+"\n</blockquote>")
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test(`> [!important]`, renderAttention("important", "octicon-report")+"\n</blockquote>")
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test(`> [!warning]`, renderAttention("warning", "octicon-alert")+"\n</blockquote>")
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test(`> [!caution]`, renderAttention("caution", "octicon-stop")+"\n</blockquote>")
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}
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67
modules/markup/markdown/transform_blockquote.go
Normal file
67
modules/markup/markdown/transform_blockquote.go
Normal file
@ -0,0 +1,67 @@
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// Copyright 2024 The Gitea Authors. 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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"strings"
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"github.com/yuin/goldmark/ast"
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"github.com/yuin/goldmark/text"
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"golang.org/x/text/cases"
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"golang.org/x/text/language"
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)
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func (g *ASTTransformer) transformBlockquote(v *ast.Blockquote, reader text.Reader) (ast.WalkStatus, error) {
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// We only want attention blockquotes when the AST looks like:
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// > Text("[") Text("!TYPE") Text("]")
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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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g.applyElementDir(firstParagraph)
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if firstParagraph.ChildCount() < 3 {
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return ast.WalkContinue, nil
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}
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node1, ok1 := firstParagraph.FirstChild().(*ast.Text)
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node2, ok2 := node1.NextSibling().(*ast.Text)
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node3, ok3 := node2.NextSibling().(*ast.Text)
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if !ok1 || !ok2 || !ok3 {
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return ast.WalkContinue, nil
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}
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val1 := string(node1.Segment.Value(reader.Source()))
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val2 := string(node2.Segment.Value(reader.Source()))
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val3 := string(node3.Segment.Value(reader.Source()))
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if val1 != "[" || val3 != "]" || !strings.HasPrefix(val2, "!") {
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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(val2[1:])
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if !g.AttentionTypes.Contains(attentionType) {
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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("attention-header attention-"+attentionType))
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// create an emphasis to make it bold
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attentionParagraph := ast.NewParagraph()
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g.applyElementDir(attentionParagraph)
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emphasis := ast.NewEmphasis(2)
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emphasis.SetAttributeString("class", []byte("attention-"+attentionType))
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attentionAstString := ast.NewString([]byte(cases.Title(language.English).String(attentionType)))
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// replace the ![TYPE] with a dedicated paragraph of icon+Type
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emphasis.AppendChild(emphasis, attentionAstString)
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attentionParagraph.AppendChild(attentionParagraph, NewAttention(attentionType))
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attentionParagraph.AppendChild(attentionParagraph, emphasis)
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firstParagraph.Parent().InsertBefore(firstParagraph.Parent(), firstParagraph, attentionParagraph)
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firstParagraph.RemoveChild(firstParagraph, node1)
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firstParagraph.RemoveChild(firstParagraph, node2)
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firstParagraph.RemoveChild(firstParagraph, node3)
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if firstParagraph.ChildCount() == 0 {
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firstParagraph.Parent().RemoveChild(firstParagraph.Parent(), firstParagraph)
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}
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return ast.WalkContinue, nil
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}
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@ -41,6 +41,21 @@ func Init() error {
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return nil
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}
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func MockIcon(icon string) func() {
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if svgIcons == nil {
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svgIcons = make(map[string]string)
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}
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orig, exist := svgIcons[icon]
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svgIcons[icon] = fmt.Sprintf(`<svg class="svg %s" width="%d" height="%d"></svg>`, icon, defaultSize, defaultSize)
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return func() {
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if exist {
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svgIcons[icon] = orig
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} else {
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delete(svgIcons, icon)
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}
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}
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}
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// RenderHTML renders icons - arguments icon name (string), size (int), class (string)
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func RenderHTML(icon string, others ...any) template.HTML {
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size, class := gitea_html.ParseSizeAndClass(defaultSize, "", others...)
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@ -55,5 +70,6 @@ func RenderHTML(icon string, others ...any) template.HTML {
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}
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return template.HTML(svgStr)
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}
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return ""
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// during test (or something wrong happens), there is no SVG loaded, so use a dummy span to tell that the icon is missing
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return template.HTML(fmt.Sprintf("<span>%s(%d/%s)</span>", template.HTMLEscapeString(icon), size, template.HTMLEscapeString(class)))
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}
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