LibWeb: Add a FrameHostElement for frame/iframe common functionality

A FrameHostElement is an HTML element (<frame> or <iframe>) that may
have a content frame that participates in the frame tree.

This basically just moves code from <iframe> to a separate base class
so we can share it with <frame> once we implement <frame>.

5 files changed, 124 insertions, 48 deletions

diff --git a/Userland/Libraries/LibWeb/CMakeLists.txt b/Userland/Libraries/LibWeb/CMakeLists.txt
index 4f57a2c46b..fc6adc0552 100644
--- a/Userland/Libraries/LibWeb/CMakeLists.txt
+++ b/Userland/Libraries/LibWeb/CMakeLists.txt
@@ -64,6 +64,7 @@ set(SOURCES
     HTML/AttributeNames.cpp
     HTML/CanvasRenderingContext2D.cpp
     HTML/EventNames.cpp
+    HTML/FrameHostElement.cpp
     HTML/GlobalEventHandlers.cpp
     HTML/HTMLAnchorElement.cpp
     HTML/HTMLAreaElement.cpp
diff --git a/Userland/Libraries/LibWeb/HTML/FrameHostElement.cpp b/Userland/Libraries/LibWeb/HTML/FrameHostElement.cpp
new file mode 100644
index 0000000000..b4d8a55c17
--- /dev/null
+++ b/Userland/Libraries/LibWeb/HTML/FrameHostElement.cpp
@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2020-2021, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <LibWeb/DOM/Document.h>
+#include <LibWeb/DOM/Event.h>
+#include <LibWeb/HTML/FrameHostElement.h>
+#include <LibWeb/Origin.h>
+#include <LibWeb/Page/Frame.h>
+
+namespace Web::HTML {
+
+FrameHostElement::FrameHostElement(DOM::Document& document, QualifiedName qualified_name)
+    : HTMLElement(document, move(qualified_name))
+{
+}
+
+FrameHostElement::~FrameHostElement()
+{
+}
+
+Origin FrameHostElement::content_origin() const
+{
+    if (!m_content_frame || !m_content_frame->document())
+        return {};
+    return m_content_frame->document()->origin();
+}
+
+bool FrameHostElement::may_access_from_origin(const Origin& origin) const
+{
+    return origin.is_same(content_origin());
+}
+
+const DOM::Document* FrameHostElement::content_document() const
+{
+    return m_content_frame ? m_content_frame->document() : nullptr;
+}
+
+void FrameHostElement::content_frame_did_load(Badge<FrameLoader>)
+{
+    dispatch_event(DOM::Event::create(EventNames::load));
+}
+
+}
diff --git a/Userland/Libraries/LibWeb/HTML/FrameHostElement.h b/Userland/Libraries/LibWeb/HTML/FrameHostElement.h
new file mode 100644
index 0000000000..24b6675563
--- /dev/null
+++ b/Userland/Libraries/LibWeb/HTML/FrameHostElement.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2020-2021, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include <LibWeb/HTML/HTMLElement.h>
+
+namespace Web::HTML {
+
+class FrameHostElement : public HTMLElement {
+public:
+    FrameHostElement(DOM::Document&, QualifiedName);
+    virtual ~FrameHostElement() override;
+
+    Frame* content_frame() { return m_content_frame; }
+    const Frame* content_frame() const { return m_content_frame; }
+
+    const DOM::Document* content_document() const;
+
+    Origin content_origin() const;
+    bool may_access_from_origin(const Origin&) const;
+
+    void content_frame_did_load(Badge<FrameLoader>);
+
+protected:
+    RefPtr<Frame> m_content_frame;
+};
+
+}
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLIFrameElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLIFrameElement.cpp
index 06b942e076..c183fa6074 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLIFrameElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLIFrameElement.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
+ * Copyright (c) 2020-2021, Andreas Kling <kling@serenityos.org>
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -24,25 +24,16 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include <LibWeb/Bindings/WindowObject.h>
 #include <LibWeb/DOM/Document.h>
-#include <LibWeb/DOM/Event.h>
-#include <LibWeb/DOM/Window.h>
-#include <LibWeb/Dump.h>
-#include <LibWeb/HTML/EventNames.h>
-#include <LibWeb/HTML/HTMLFormElement.h>
 #include <LibWeb/HTML/HTMLIFrameElement.h>
-#include <LibWeb/HTML/Parser/HTMLDocumentParser.h>
-#include <LibWeb/InProcessWebView.h>
 #include <LibWeb/Layout/FrameBox.h>
-#include <LibWeb/Loader/ResourceLoader.h>
 #include <LibWeb/Origin.h>
 #include <LibWeb/Page/Frame.h>
 
 namespace Web::HTML {
 
 HTMLIFrameElement::HTMLIFrameElement(DOM::Document& document, QualifiedName qualified_name)
-    : HTMLElement(document, move(qualified_name))
+    : FrameHostElement(document, move(qualified_name))
 {
     VERIFY(document.frame());
     m_content_frame = Frame::create_subframe(*this, document.frame()->main_frame());
@@ -81,26 +72,4 @@ void HTMLIFrameElement::load_src(const String& value)
     m_content_frame->loader().load(url, FrameLoader::Type::IFrame);
 }
 
-Origin HTMLIFrameElement::content_origin() const
-{
-    if (!m_content_frame || !m_content_frame->document())
-        return {};
-    return m_content_frame->document()->origin();
-}
-
-bool HTMLIFrameElement::may_access_from_origin(const Origin& origin) const
-{
-    return origin.is_same(content_origin());
-}
-
-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(EventNames::load));
-}
-
 }
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLIFrameElement.h b/Userland/Libraries/LibWeb/HTML/HTMLIFrameElement.h
index e3cd3bb882..1039c7d0ed 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLIFrameElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLIFrameElement.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
+ * Copyright (c) 2020-2021, Andreas Kling <kling@serenityos.org>
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -26,11 +26,11 @@
 
 #pragma once
 
-#include <LibWeb/HTML/HTMLElement.h>
+#include <LibWeb/HTML/FrameHostElement.h>
 
 namespace Web::HTML {
 
-class HTMLIFrameElement final : public HTMLElement {
+class HTMLIFrameElement final : public FrameHostElement {
 public:
     using WrapperType = Bindings::HTMLIFrameElementWrapper;
 
@@ -39,22 +39,10 @@ public:
 
     virtual RefPtr<Layout::Node> create_layout_node() override;
 
-    Frame* content_frame() { return m_content_frame; }
-    const Frame* content_frame() const { return m_content_frame; }
-
-    const DOM::Document* content_document() const;
-
-    Origin content_origin() const;
-    bool may_access_from_origin(const Origin&) const;
-
-    void content_frame_did_load(Badge<FrameLoader>);
-
 private:
     virtual void parse_attribute(const FlyString& name, const String& value) override;
 
     void load_src(const String&);
-
-    RefPtr<Frame> m_content_frame;
 };
 
 }