Refactor markdown render (#30139)

Only split the file into small ones (and rename AttentionTypes to
attentionTypes)

modules/markup/markdown/transform_blockquote.go

@@ -6,12 +6,37 @@ package markdown
 import (
 	"strings"
 
+	"code.gitea.io/gitea/modules/svg"
+
 	"github.com/yuin/goldmark/ast"
 	"github.com/yuin/goldmark/text"
+	"github.com/yuin/goldmark/util"
 	"golang.org/x/text/cases"
 	"golang.org/x/text/language"
 )
 
+// 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)
+		var octiconName string
+		switch n.AttentionType {
+		case "tip":
+			octiconName = "light-bulb"
+		case "important":
+			octiconName = "report"
+		case "warning":
+			octiconName = "alert"
+		case "caution":
+			octiconName = "stop"
+		default: // including "note"
+			octiconName = "info"
+		}
+		_, _ = w.WriteString(string(svg.RenderHTML("octicon-"+octiconName, 16, "attention-icon attention-"+n.AttentionType)))
+	}
+	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("]")
@@ -43,7 +68,7 @@ func (g *ASTTransformer) transformBlockquote(v *ast.Blockquote, reader text.Read
 
 	// grab attention type from markdown source
 	attentionType := strings.ToLower(val2[1:])
-	if !g.AttentionTypes.Contains(attentionType) {
+	if !g.attentionTypes.Contains(attentionType) {
 		return ast.WalkContinue, nil
 	}