par(md): fix parse many paragraphs

par/md.test.ts

@@ -106,11 +106,42 @@ Deno.test({
   fn: () => {
     const par = new MarkdownParser();
 
-    const input = `\
+    assertEquals(
+      ren.render(par.parse(`\
 hello
-world`;
+world`)),
+      "<p>hello world</p>",
+    );
+  },
+});
 
-    assertEquals(ren.render(par.parse(input)), "<p>hello world</p>");
+Deno.test({
+  name: "should parse many big paragraphs",
+  fn: () => {
+    const par = new MarkdownParser();
+
+    assertEquals(
+      ren.render(par.parse(`\
+hello
+world`)),
+      "<p>hello world</p>",
+    );
+
+    assertEquals(
+      ren.render(par.parse(`\
+Lorem Ipsum is simply dummy text of the printing
+and typesetting industry.
+
+Lorem Ipsum has been the industry's standard dummy
+text ever since the 1500s, when an unknown printer
+took a galley of type and scrambled it to make a
+type specimen book.
+
+It has survived not only five centuries, but also
+the leap into electronic typesetting, remaining
+essentially unchanged.`)),
+      "<p>Lorem Ipsum is simply dummy text of the printing and typesetting industry.</p><p>Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.</p><p>It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged.</p>",
+    );
   },
 });
 
@@ -258,3 +289,27 @@ Deno.test({
     );
   },
 });
+
+// Doc
+
+Deno.test({
+  name: "should parse all document",
+  only: true,
+  fn: () => {
+    const par = new MarkdownParser();
+
+    const content = `\
+# What is Lorem Ipsum?
+
+Lorem Ipsum is simply dummy text of the printing and typesetting industry.
+
+- Sed in orci non lorem luctus dictum ac vel justo.
+- Nunc non leo vel dolor fringilla imperdiet.
+- Proin finibus ipsum quis molestie porta.`;
+
+    assertEquals(
+      ren.render(par.parse(content)),
+      "<h1>What is Lorem Ipsum?</h1><p>Lorem Ipsum is simply dummy text of the printing and typesetting industry.</p><ul><li>Sed in orci non lorem luctus dictum ac vel justo.</li><li>Nunc non leo vel dolor fringilla imperdiet.</li><li>Proin finibus ipsum quis molestie porta.</li></ul>",
+    );
+  },
+});

par/md.ts

@@ -2,7 +2,7 @@ import { AnyNode, Elem, Fragment, TextNode } from "../core/node.ts";
 import { isNil, Nilable } from "../core/utils.ts";
 import { Parser } from "./types.ts";
 
-const RE_EMPTY_LINE = /^\s*$/;
+const RE_EMPTY_LINE = /^[ \t]*\r?\n/;
 
 const RE_OPEN_ATX_HEADING = /^\s{0,3}(#{1,6})(\s|$)/;
 const RE_CLOSE_ATX_HEADING = /(^|\s+)#*\s*$/;
@@ -166,19 +166,20 @@ function parseParagraph(
     kind: AstKind.Paragraph,
     content: [],
   };
-  ast.content.push(paragraph);
 
   let paragraphInlineContent = "";
-  while (!RE_EMPTY_LINE.test(readStr)) {
+  while (readStr && !RE_EMPTY_LINE.test(readStr)) {
     const listMatch = RE_LIST_ITEM.exec(readStr);
     if (!isNil(listMatch)) break;
-    paragraphInlineContent += readStr.includes("\n")
+    const newPart = readStr.includes("\n")
       ? readStr.slice(0, readStr.indexOf("\n") + 1)
       : readStr;
-    readStr = readStr.slice(paragraphInlineContent.length);
+    paragraphInlineContent += newPart;
+    readStr = readStr.slice(newPart.length);
   }
 
   if (paragraphInlineContent.length) {
+    ast.content.push(paragraph);
     parseInlineContent(paragraph, paragraphInlineContent);
   }