From 71d7c8a3536c59c8f298404e28c09638fff2bab0 Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Thu, 9 Sep 2021 02:10:05 +0200
Subject: [PATCH] LibWeb: Add BrowsingContext::container_document()

This is the "browsing context container document" from the spec.
---
 Userland/Libraries/LibWeb/Page/BrowsingContext.cpp | 14 ++++++++++++++
 Userland/Libraries/LibWeb/Page/BrowsingContext.h   |  3 +++
 2 files changed, 17 insertions(+)

diff --git a/Userland/Libraries/LibWeb/Page/BrowsingContext.cpp b/Userland/Libraries/LibWeb/Page/BrowsingContext.cpp
index 23a1725ba8..9fd86901ad 100644
--- a/Userland/Libraries/LibWeb/Page/BrowsingContext.cpp
+++ b/Userland/Libraries/LibWeb/Page/BrowsingContext.cpp
@@ -348,4 +348,18 @@ bool BrowsingContext::decrement_cursor_position_offset()
     return true;
 }
 
+DOM::Document* BrowsingContext::container_document()
+{
+    if (auto* container = this->container())
+        return &container->document();
+    return nullptr;
+}
+
+DOM::Document const* BrowsingContext::container_document() const
+{
+    if (auto* container = this->container())
+        return &container->document();
+    return nullptr;
+}
+
 }
diff --git a/Userland/Libraries/LibWeb/Page/BrowsingContext.h b/Userland/Libraries/LibWeb/Page/BrowsingContext.h
index 509d8a63cf..80acd890f8 100644
--- a/Userland/Libraries/LibWeb/Page/BrowsingContext.h
+++ b/Userland/Libraries/LibWeb/Page/BrowsingContext.h
@@ -91,6 +91,9 @@ public:
     void set_frame_nesting_levels(HashMap<URL, size_t> frame_nesting_levels) { m_frame_nesting_levels = move(frame_nesting_levels); };
     HashMap<URL, size_t> const& frame_nesting_levels() const { return m_frame_nesting_levels; }
 
+    DOM::Document* container_document();
+    DOM::Document const* container_document() const;
+
 private:
     explicit BrowsingContext(Page&, HTML::BrowsingContextContainer*, BrowsingContext& top_level_browsing_context);
     explicit BrowsingContext(HTML::BrowsingContextContainer&, BrowsingContext& top_level_browsing_context);