Fixes #503

Author: yuin

ast/block.go

@@ -515,6 +515,7 @@ func (n *HTMLBlock) Dump(source []byte, level int) {
 		cl := n.ClosureLine
 		fmt.Printf("%sClosure: \"%s\"\n", indent2, string(cl.Value(source)))
 	}
+	fmt.Printf("%sHasBlankPreviousLines: %v\n", indent2, n.HasBlankPreviousLines())
 	fmt.Printf("%s}\n", indent)
 }
 

ast_test.go

@@ -5,6 +5,7 @@ import (
 	"testing"
 
 	. "github.com/yuin/goldmark"
+	"github.com/yuin/goldmark/ast"
 	"github.com/yuin/goldmark/testutil"
 	"github.com/yuin/goldmark/text"
 )
@@ -202,3 +203,92 @@ func TestASTInlineNodeText(t *testing.T) {
 	}
 
 }
+
+func TestHasBlankPreviousLines(t *testing.T) {
+	var cases = []struct {
+		Name     string
+		Source   string
+		Node     func(n ast.Node) ast.Node
+		Expected bool
+	}{
+		{
+			Name: "nesting paragraphs in blockquotes",
+			Source: `
+> a
+> 
+> b
+`,
+			Node: func(n ast.Node) ast.Node {
+				return n.FirstChild().FirstChild().NextSibling()
+			},
+			Expected: true,
+		},
+		{
+			Name: "nesting HTML blocks in blockquotes",
+			Source: `
+> <!-- a -->
+> 
+> <!-- b -->
+`,
+			Node: func(n ast.Node) ast.Node {
+				return n.FirstChild().FirstChild().NextSibling()
+			},
+			Expected: true,
+		},
+		{
+			Name: "nesting HTML blocks in blockquotes",
+			Source: `
+> <!-- a -->
+> <!-- b -->
+`,
+			Node: func(n ast.Node) ast.Node {
+				return n.FirstChild().FirstChild().NextSibling()
+			},
+			Expected: false,
+		},
+		{
+			Name: "nesting loose lists in blockquotes",
+			Source: `
+> - a
+> 
+> - b
+`,
+			Node: func(n ast.Node) ast.Node {
+				return n.FirstChild().FirstChild().FirstChild().NextSibling()
+			},
+			Expected: true,
+		},
+		{
+			Name: "nesting tight lists in blockquotes",
+			Source: `
+> - a
+> - b
+`,
+			Node: func(n ast.Node) ast.Node {
+				return n.FirstChild().FirstChild().FirstChild().NextSibling()
+			},
+			Expected: false,
+		},
+		{
+			Name: "nesting paragraphs in lists",
+			Source: `
+- a
+
+  b
+`,
+			Node: func(n ast.Node) ast.Node {
+				return n.FirstChild().FirstChild().FirstChild().NextSibling()
+			},
+			Expected: true,
+		},
+	}
+	md := New()
+	for _, cs := range cases {
+		t.Run(cs.Name, func(t *testing.T) {
+			n := md.Parser().Parse(text.NewReader([]byte(cs.Source)))
+			if cs.Node(n).HasBlankPreviousLines() != cs.Expected {
+				t.Errorf("expected %v, got %v", cs.Expected, !cs.Expected)
+			}
+		})
+	}
+}

parser/parser.go

@@ -1096,7 +1096,7 @@ func (p *parser) parseBlocks(parent ast.Node, reader text.Reader, pc Context) {
 						// When current node is a container block and has no children,
 						// we try to open new child nodes
 						if state&HasChildren != 0 && i == lastIndex {
-							isBlank = isBlankLine(lineNum-1, i, blankLines)
+							isBlank = isBlankLine(lineNum-1, i+1, blankLines)
 							p.openBlocks(be.Node, isBlank, reader, pc)
 							break
 						}