From 618dcbe405a5d8c345d0c3c655e9cf29d1a68056 Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Tue, 22 Sep 2020 17:53:40 +0200
Subject: [PATCH] LibWeb: Dispatch DOM "load" event on <iframe> elements

---
 Libraries/LibWeb/Forward.h                  | 1 +
 Libraries/LibWeb/HTML/HTMLIFrameElement.cpp | 5 +++++
 Libraries/LibWeb/HTML/HTMLIFrameElement.h   | 2 ++
 Libraries/LibWeb/Loader/FrameLoader.cpp     | 7 +++++++
 4 files changed, 15 insertions(+)

diff --git a/Libraries/LibWeb/Forward.h b/Libraries/LibWeb/Forward.h
index 5da2efc583e..bba27d94c09 100644
--- a/Libraries/LibWeb/Forward.h
+++ b/Libraries/LibWeb/Forward.h
@@ -135,6 +135,7 @@ class ImageData;
 namespace Web {
 class EventHandler;
 class Frame;
+class FrameLoader;
 class LayoutBlock;
 class LayoutButton;
 class LayoutCheckBox;
diff --git a/Libraries/LibWeb/HTML/HTMLIFrameElement.cpp b/Libraries/LibWeb/HTML/HTMLIFrameElement.cpp
index 25b79c3c2af..3c1d536c1e3 100644
--- a/Libraries/LibWeb/HTML/HTMLIFrameElement.cpp
+++ b/Libraries/LibWeb/HTML/HTMLIFrameElement.cpp
@@ -86,4 +86,9 @@ const DOM::Document* HTMLIFrameElement::content_document() const
     return m_content_frame ? m_content_frame->document() : nullptr;
 }
 
+void HTMLIFrameElement::content_frame_did_load(Badge<FrameLoader>)
+{
+    dispatch_event(DOM::Event::create("load"));
+}
+
 }
diff --git a/Libraries/LibWeb/HTML/HTMLIFrameElement.h b/Libraries/LibWeb/HTML/HTMLIFrameElement.h
index ed377d2abfe..bff8692b220 100644
--- a/Libraries/LibWeb/HTML/HTMLIFrameElement.h
+++ b/Libraries/LibWeb/HTML/HTMLIFrameElement.h
@@ -44,6 +44,8 @@ public:
 
     const DOM::Document* content_document() const;
 
+    void content_frame_did_load(Badge<FrameLoader>);
+
 private:
     virtual void document_did_attach_to_frame(Frame&) override;
     virtual void document_will_detach_from_frame(Frame&) override;
diff --git a/Libraries/LibWeb/Loader/FrameLoader.cpp b/Libraries/LibWeb/Loader/FrameLoader.cpp
index 1ef1798e955..ab5f148292c 100644
--- a/Libraries/LibWeb/Loader/FrameLoader.cpp
+++ b/Libraries/LibWeb/Loader/FrameLoader.cpp
@@ -31,6 +31,7 @@
 #include <LibWeb/DOM/Document.h>
 #include <LibWeb/DOM/ElementFactory.h>
 #include <LibWeb/DOM/Text.h>
+#include <LibWeb/HTML/HTMLIFrameElement.h>
 #include <LibWeb/HTML/Parser/HTMLDocumentParser.h>
 #include <LibWeb/Loader/FrameLoader.h>
 #include <LibWeb/Loader/ResourceLoader.h>
@@ -230,6 +231,12 @@ void FrameLoader::resource_did_load()
 
     if (!url.fragment().is_empty())
         frame().scroll_to_anchor(url.fragment());
+
+    if (auto* host_element = frame().host_element()) {
+        // FIXME: Perhaps in the future we'll have a better common base class for <frame> and <iframe>
+        ASSERT(is<HTML::HTMLIFrameElement>(*host_element));
+        downcast<HTML::HTMLIFrameElement>(*host_element).content_frame_did_load({});
+    }
 }
 
 void FrameLoader::resource_did_fail()