chore: add line break node

plugin/gomark/ast/block.go

@@ -3,6 +3,20 @@ package ast
 type BaseBlock struct {
 }
 
+type LineBreak struct {
+	BaseBlock
+}
+
+var NodeTypeLineBreak = NewNodeType("LineBreak")
+
+func NewLineBreak() *LineBreak {
+	return &LineBreak{}
+}
+
+func (*LineBreak) Type() NodeType {
+	return NodeTypeLineBreak
+}
+
 type Paragraph struct {
 	BaseBlock
 

plugin/gomark/parser/line_break.go

@@ -0,0 +1,33 @@
+package parser
+
+import (
+	"github.com/usememos/memos/plugin/gomark/ast"
+	"github.com/usememos/memos/plugin/gomark/parser/tokenizer"
+)
+
+type LineBreakParser struct{}
+
+var defaultLineBreakParser = &LineBreakParser{}
+
+func NewLineBreakParser() *LineBreakParser {
+	return defaultLineBreakParser
+}
+
+func (*LineBreakParser) Match(tokens []*tokenizer.Token) (int, bool) {
+	if len(tokens) == 0 {
+		return 0, false
+	}
+	if tokens[0].Type != tokenizer.Newline {
+		return 0, false
+	}
+	return 1, true
+}
+
+func (p *LineBreakParser) Parse(tokens []*tokenizer.Token) ast.Node {
+	size, ok := p.Match(tokens)
+	if size == 0 || !ok {
+		return nil
+	}
+
+	return ast.NewLineBreak()
+}

plugin/gomark/parser/parser.go

@@ -26,7 +26,9 @@ type BlockParser interface {
 func Parse(tokens []*tokenizer.Token) []ast.Node {
 	nodes := []ast.Node{}
 	blockParsers := []BlockParser{
+		NewCodeBlockParser(),
 		NewParagraphParser(),
+		NewLineBreakParser(),
 	}
 	for len(tokens) > 0 {
 		for _, blockParser := range blockParsers {

plugin/gomark/parser/parser_test.go

@@ -61,6 +61,30 @@ func TestParser(t *testing.T) {
 				},
 			},
 		},
+		{
+			text: "Hello **world**!\n```javascript\nconsole.log(\"Hello world!\");\n```",
+			nodes: []ast.Node{
+				&ast.Paragraph{
+					Children: []ast.Node{
+						&ast.Text{
+							Content: "Hello ",
+						},
+						&ast.Bold{
+							Symbol:  "*",
+							Content: "world",
+						},
+						&ast.Text{
+							Content: "!",
+						},
+					},
+				},
+				&ast.LineBreak{},
+				&ast.CodeBlock{
+					Language: "javascript",
+					Content:  "console.log(\"Hello world!\");",
+				},
+			},
+		},
 	}
 
 	for _, test := range tests {