mirror of https://github.com/go-gitea/gitea.git
Add alert blocks in markdown (#29121)
- Follows https://github.com/go-gitea/gitea/pull/21711 - Closes https://github.com/go-gitea/gitea/issues/28316 Implement GitHub's alert blocks markdown feature Docs: - https://docs.github.com/en/get-started/writing-on-github/getting-started-with-writing-and-formatting-on-github/basic-writing-and-formatting-syntax#alerts - https://github.com/orgs/community/discussions/16925 ### Before ![image](https://github.com/go-gitea/gitea/assets/20454870/14f7b02a-5de5-4fd0-8437-a055dadb31f2) ### After ![image](https://github.com/go-gitea/gitea/assets/20454870/ed06a869-e545-42f1-bf25-4ba20b1be196) ## ⚠️ BREAKING ⚠️ The old syntax no longer works How to migrate: If you used ```md > **Note** My note ``` Switch to ```md > [!NOTE] > My note ``` --------- Signed-off-by: Yarden Shoham <git@yardenshoham.com> Co-authored-by: silverwind <me@silverwind.io> Co-authored-by: Giteabot <teabot@gitea.io>
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@ -182,12 +182,7 @@ func IsColorPreview(node ast.Node) bool {
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return ok
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}
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const (
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AttentionNote string = "Note"
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AttentionWarning string = "Warning"
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)
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// Attention is an inline for a color preview
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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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@ -53,7 +53,6 @@ func (g *ASTTransformer) Transform(node *ast.Document, reader text.Reader, pc pa
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}
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}
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attentionMarkedBlockquotes := make(container.Set[*ast.Blockquote])
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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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@ -197,18 +196,55 @@ 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.Emphasis:
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// check if inside blockquote for attention, expected hierarchy is
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// Emphasis < Paragraph < Blockquote
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blockquote, isInBlockquote := n.Parent().Parent().(*ast.Blockquote)
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if isInBlockquote && !attentionMarkedBlockquotes.Contains(blockquote) {
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fullText := string(n.Text(reader.Source()))
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if fullText == AttentionNote || fullText == AttentionWarning {
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v.SetAttributeString("class", []byte("attention-"+strings.ToLower(fullText)))
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v.Parent().InsertBefore(v.Parent(), v, NewAttention(fullText))
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attentionMarkedBlockquotes.Add(blockquote)
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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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@ -339,17 +375,23 @@ func (r *HTMLRenderer) renderCodeSpan(w util.BufWriter, source []byte, n ast.Nod
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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="attention-icon attention-`)
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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 AttentionNote:
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case "note":
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octiconType = "info"
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case AttentionWarning:
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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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@ -417,7 +459,10 @@ 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 validNameRE = regexp.MustCompile("^[a-z ]+$")
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var (
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validNameRE = regexp.MustCompile("^[a-z ]+$")
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attentionTypeRE = regexp.MustCompile("^!(NOTE|TIP|IMPORTANT|WARNING|CAUTION)$")
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)
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func (r *HTMLRenderer) renderIcon(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
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if !entering {
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@ -64,9 +64,10 @@ func createDefaultPolicy() *bluemonday.Policy {
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policy.AllowAttrs("class").Matching(regexp.MustCompile(`^color-preview$`)).OnElements("span")
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// For attention
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policy.AllowAttrs("class").Matching(regexp.MustCompile(`^gt-py-3 attention attention-\w+$`)).OnElements("blockquote")
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policy.AllowAttrs("class").Matching(regexp.MustCompile(`^attention-\w+$`)).OnElements("strong")
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policy.AllowAttrs("class").Matching(regexp.MustCompile(`^attention-icon attention-\w+$`)).OnElements("span", "strong")
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policy.AllowAttrs("class").Matching(regexp.MustCompile(`^svg octicon-\w+$`)).OnElements("svg")
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policy.AllowAttrs("class").Matching(regexp.MustCompile(`^gt-mr-2 gt-vm attention-\w+$`)).OnElements("span", "strong")
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policy.AllowAttrs("class").Matching(regexp.MustCompile(`^svg octicon-(\w|-)+$`)).OnElements("svg")
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policy.AllowAttrs("viewBox", "width", "height", "aria-hidden").OnElements("svg")
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policy.AllowAttrs("fill-rule", "d").OnElements("path")
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@ -1268,20 +1268,45 @@ img.ui.avatar,
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border-radius: var(--border-radius);
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}
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.attention-icon {
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vertical-align: text-top;
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.attention {
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color: var(--color-text) !important;
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}
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.attention-note {
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font-weight: unset;
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color: var(--color-info-text);
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blockquote.attention-note {
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border-left-color: var(--color-blue-dark-1);
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}
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strong.attention-note, span.attention-note {
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color: var(--color-blue-dark-1);
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}
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.attention-warning {
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font-weight: unset;
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blockquote.attention-tip {
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border-left-color: var(--color-success-text);
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}
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strong.attention-tip, span.attention-tip {
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color: var(--color-success-text);
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}
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blockquote.attention-important {
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border-left-color: var(--color-violet-dark-1);
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}
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strong.attention-important, span.attention-important {
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color: var(--color-violet-dark-1);
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}
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blockquote.attention-warning {
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border-left-color: var(--color-warning-text);
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}
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strong.attention-warning, span.attention-warning {
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color: var(--color-warning-text);
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}
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blockquote.attention-caution {
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border-left-color: var(--color-red-dark-1);
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}
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strong.attention-caution, span.attention-caution {
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color: var(--color-red-dark-1);
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}
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.center:not(.popup) {
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text-align: center;
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}
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