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Make blockquote attention recognize more syntaxes (#31240)

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Fix #31214
This commit is contained in:
wxiaoguang 2024-06-04 23:35:29 +08:00 committed by GitHub
parent fcc061ae44
commit bd80225ec3
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GPG Key ID: B5690EEEBB952194
3 changed files with 87 additions and 20 deletions
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6
modules/markup/markdown/markdown_test.go
View File

@ -1019,4 +1019,10 @@ func TestAttention(t *testing.T) {
test(`> [!important]`, renderAttention("important", "octicon-report")+"\n</blockquote>")
test(`> [!warning]`, renderAttention("warning", "octicon-alert")+"\n</blockquote>")
test(`> [!caution]`, renderAttention("caution", "octicon-stop")+"\n</blockquote>")
// escaped by mdformat
test(`> \[!NOTE\]`, renderAttention("note", "octicon-info")+"\n</blockquote>")
// legacy GitHub style
test(`> **warning**`, renderAttention("warning", "octicon-alert")+"\n</blockquote>")
}

10
modules/markup/markdown/math/block_parser.go
View File

@ -31,10 +31,16 @@ func (b *blockParser) Open(parent ast.Node, reader text.Reader, pc parser.Contex
return nil, parser.NoChildren
}
dollars := false
var dollars bool
if b.parseDollars && line[pos] == '$' && line[pos+1] == '$' {
dollars = true
} else if line[pos] != '\\' || line[pos+1] != '[' {
} else if line[pos] == '\\' && line[pos+1] == '[' {
if len(line[pos:]) >= 3 && line[pos+2] == '!' && bytes.Contains(line[pos:], []byte(`\]`)) {
// do not process escaped attention block: "> \[!NOTE\]"
return nil, parser.NoChildren
}
dollars = false
} else {
return nil, parser.NoChildren
}

91
modules/markup/markdown/transform_blockquote.go
View File

@ -15,7 +15,7 @@ import (
"golang.org/x/text/language"
)
// renderAttention renders a quote marked with i.e. "> **Note**" or "> **Warning**" with a corresponding svg
// renderAttention renders a quote marked with i.e. "> **Note**" or "> [!Warning]" with a corresponding svg
func (r *HTMLRenderer) renderAttention(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
if entering {
n := node.(*Attention)
@ -37,38 +37,93 @@ func (r *HTMLRenderer) renderAttention(w util.BufWriter, source []byte, node ast
return ast.WalkContinue, nil
}
func (g *ASTTransformer) transformBlockquote(v *ast.Blockquote, reader text.Reader) (ast.WalkStatus, error) {
// We only want attention blockquotes when the AST looks like:
// > Text("[") Text("!TYPE") Text("]")
func (g *ASTTransformer) extractBlockquoteAttentionEmphasis(firstParagraph ast.Node, reader text.Reader) (string, []ast.Node) {
if firstParagraph.ChildCount() < 1 {
return "", nil
}
node1, ok := firstParagraph.FirstChild().(*ast.Emphasis)
if !ok {
return "", nil
}
val1 := string(node1.Text(reader.Source()))
attentionType := strings.ToLower(val1)
if g.attentionTypes.Contains(attentionType) {
return attentionType, []ast.Node{node1}
}
return "", nil
}
// grab these nodes and make sure we adhere to the attention blockquote structure
firstParagraph := v.FirstChild()
g.applyElementDir(firstParagraph)
if firstParagraph.ChildCount() < 3 {
return ast.WalkContinue, nil
func (g *ASTTransformer) extractBlockquoteAttention2(firstParagraph ast.Node, reader text.Reader) (string, []ast.Node) {
if firstParagraph.ChildCount() < 2 {
return "", nil
}
node1, ok := firstParagraph.FirstChild().(*ast.Text)
if !ok {
return ast.WalkContinue, nil
return "", nil
}
node2, ok := node1.NextSibling().(*ast.Text)
if !ok {
return ast.WalkContinue, nil
return "", nil
}
val1 := string(node1.Segment.Value(reader.Source()))
val2 := string(node2.Segment.Value(reader.Source()))
if strings.HasPrefix(val1, `\[!`) && val2 == `\]` {
attentionType := strings.ToLower(val1[3:])
if g.attentionTypes.Contains(attentionType) {
return attentionType, []ast.Node{node1, node2}
}
}
return "", nil
}
func (g *ASTTransformer) extractBlockquoteAttention3(firstParagraph ast.Node, reader text.Reader) (string, []ast.Node) {
if firstParagraph.ChildCount() < 3 {
return "", nil
}
node1, ok := firstParagraph.FirstChild().(*ast.Text)
if !ok {
return "", nil
}
node2, ok := node1.NextSibling().(*ast.Text)
if !ok {
return "", nil
}
node3, ok := node2.NextSibling().(*ast.Text)
if !ok {
return ast.WalkContinue, nil
return "", nil
}
val1 := string(node1.Segment.Value(reader.Source()))
val2 := string(node2.Segment.Value(reader.Source()))
val3 := string(node3.Segment.Value(reader.Source()))
if val1 != "[" || val3 != "]" || !strings.HasPrefix(val2, "!") {
return ast.WalkContinue, nil
return "", nil
}
// grab attention type from markdown source
attentionType := strings.ToLower(val2[1:])
if !g.attentionTypes.Contains(attentionType) {
if g.attentionTypes.Contains(attentionType) {
return attentionType, []ast.Node{node1, node2, node3}
}
return "", nil
}
func (g *ASTTransformer) transformBlockquote(v *ast.Blockquote, reader text.Reader) (ast.WalkStatus, error) {
// We only want attention blockquotes when the AST looks like:
// > Text("[") Text("!TYPE") Text("]")
// > Text("\[!TYPE") TEXT("\]")
// > Text("**TYPE**")
// grab these nodes and make sure we adhere to the attention blockquote structure
firstParagraph := v.FirstChild()
g.applyElementDir(firstParagraph)
attentionType, processedNodes := g.extractBlockquoteAttentionEmphasis(firstParagraph, reader)
if attentionType == "" {
attentionType, processedNodes = g.extractBlockquoteAttention2(firstParagraph, reader)
}
if attentionType == "" {
attentionType, processedNodes = g.extractBlockquoteAttention3(firstParagraph, reader)
}
if attentionType == "" {
return ast.WalkContinue, nil
}
@ -88,9 +143,9 @@ func (g *ASTTransformer) transformBlockquote(v *ast.Blockquote, reader text.Read
attentionParagraph.AppendChild(attentionParagraph, NewAttention(attentionType))
attentionParagraph.AppendChild(attentionParagraph, emphasis)
firstParagraph.Parent().InsertBefore(firstParagraph.Parent(), firstParagraph, attentionParagraph)
firstParagraph.RemoveChild(firstParagraph, node1)
firstParagraph.RemoveChild(firstParagraph, node2)
firstParagraph.RemoveChild(firstParagraph, node3)
for _, processed := range processedNodes {
firstParagraph.RemoveChild(firstParagraph, processed)
}
if firstParagraph.ChildCount() == 0 {
firstParagraph.Parent().RemoveChild(firstParagraph.Parent(), firstParagraph)
}