From a4bb1de26a936764f1b513bf41e073200ffbf781 Mon Sep 17 00:00:00 2001
From: Nolan Lawson <nolan@nolanlawson.com>
Date: Sat, 5 Oct 2024 20:57:01 -1000
Subject: [PATCH] fix: fix `<noframes>` parsing (#1277)

* fix: fix `<noframes>` parsing

Fixes #972
---
 packages/parse5/lib/parser/index.test.ts | 34 ++++++++++++++++++++++++
 packages/parse5/lib/parser/index.ts      | 13 ++++-----
 2 files changed, 41 insertions(+), 6 deletions(-)

diff --git a/packages/parse5/lib/parser/index.test.ts b/packages/parse5/lib/parser/index.test.ts
index 890594e03..249d00c7e 100644
--- a/packages/parse5/lib/parser/index.test.ts
+++ b/packages/parse5/lib/parser/index.test.ts
@@ -3,6 +3,7 @@ import { parseFragment, parse } from 'parse5';
 import { jest } from '@jest/globals';
 import { generateParsingTests } from 'parse5-test-utils/utils/generate-parsing-tests.js';
 import { treeAdapters } from 'parse5-test-utils/utils/common.js';
+import type { Element, TextNode } from '../tree-adapters/default.js';
 
 generateParsingTests(
     'parser',
@@ -110,4 +111,37 @@ describe('parser', () => {
             expect(onItemPop).toHaveBeenLastCalledWith(bodyElement.childNodes[0], bodyElement);
         });
     });
+
+    describe('rawtext parsing', () => {
+        it.each([
+            ['iframe'],
+            ['noembed'],
+            ['noframes'],
+            ['noscript'],
+            ['script'],
+            ['style'],
+            ['textarea'],
+            ['title'],
+            ['xmp'],
+        ])('<%s>', (tagName) => {
+            const html = `<r><${tagName}><math id="</${tagName}><b>should be outside</b>">`;
+            const fragment = parseFragment(html);
+
+            expect(fragment.childNodes.length).toBe(1);
+            const r = fragment.childNodes[0] as Element;
+            expect(r.nodeName).toBe('r');
+            expect(r.childNodes).toHaveLength(3);
+            expect(r.childNodes.map((_) => _.nodeName)).toEqual([tagName, 'b', '#text']);
+
+            const target = r.childNodes[0] as Element;
+            expect(target.childNodes).toHaveLength(1);
+            expect(target.childNodes[0].nodeName).toBe('#text');
+            expect((target.childNodes[0] as TextNode).value).toBe('<math id="');
+
+            const b = r.childNodes[1] as Element;
+            expect(b.childNodes).toHaveLength(1);
+            expect(b.childNodes[0].nodeName).toBe('#text');
+            expect((b.childNodes[0] as TextNode).value).toBe('should be outside');
+        });
+    });
 });
diff --git a/packages/parse5/lib/parser/index.ts b/packages/parse5/lib/parser/index.ts
index 5dd908ca0..8a0fcb341 100644
--- a/packages/parse5/lib/parser/index.ts
+++ b/packages/parse5/lib/parser/index.ts
@@ -2195,9 +2195,9 @@ function iframeStartTagInBody<T extends TreeAdapterTypeMap>(p: Parser<T>, token:
     p._switchToTextParsing(token, TokenizerMode.RAWTEXT);
 }
 
-//NOTE: here we assume that we always act as an user agent with enabled plugins, so we parse
-//<noembed> as rawtext.
-function noembedStartTagInBody<T extends TreeAdapterTypeMap>(p: Parser<T>, token: TagToken): void {
+//NOTE: here we assume that we always act as a user agent with enabled plugins/frames, so we parse
+//<noembed>/<noframes> as rawtext.
+function rawTextStartTagInBody<T extends TreeAdapterTypeMap>(p: Parser<T>, token: TagToken): void {
     p._switchToTextParsing(token, TokenizerMode.RAWTEXT);
 }
 
@@ -2449,8 +2449,9 @@ function startTagInBody<T extends TreeAdapterTypeMap>(p: Parser<T>, token: TagTo
             optgroupStartTagInBody(p, token);
             break;
         }
-        case $.NOEMBED: {
-            noembedStartTagInBody(p, token);
+        case $.NOEMBED:
+        case $.NOFRAMES: {
+            rawTextStartTagInBody(p, token);
             break;
         }
         case $.FRAMESET: {
@@ -2463,7 +2464,7 @@ function startTagInBody<T extends TreeAdapterTypeMap>(p: Parser<T>, token: TagTo
         }
         case $.NOSCRIPT: {
             if (p.options.scriptingEnabled) {
-                noembedStartTagInBody(p, token);
+                rawTextStartTagInBody(p, token);
             } else {
                 genericStartTagInBody(p, token);
             }