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99 lines
3.2 KiB
Go
99 lines
3.2 KiB
Go
// 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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"code.gitea.io/gitea/modules/svg"
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"github.com/yuin/goldmark/ast"
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"github.com/yuin/goldmark/text"
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"github.com/yuin/goldmark/util"
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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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// 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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n := node.(*Attention)
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var octiconName string
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switch n.AttentionType {
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case "tip":
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octiconName = "light-bulb"
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case "important":
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octiconName = "report"
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case "warning":
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octiconName = "alert"
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case "caution":
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octiconName = "stop"
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default: // including "note"
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octiconName = "info"
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}
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_, _ = w.WriteString(string(svg.RenderHTML("octicon-"+octiconName, 16, "attention-icon attention-"+n.AttentionType)))
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}
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return ast.WalkContinue, nil
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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, ok := firstParagraph.FirstChild().(*ast.Text)
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if !ok {
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return ast.WalkContinue, nil
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}
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node2, ok := node1.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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node3, ok := node2.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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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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