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68 lines
2.4 KiB
68 lines
2.4 KiB
8 months ago
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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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