LibWeb: Move Origin into the HTML namespace

Origin is defined in the HTML Standard, and therefore belongs into the
HTML directory and namespace in LibWeb.
https://html.spec.whatwg.org/multipage/origin.html#origin

Userland/Libraries/LibWeb/HTML/BrowsingContextContainer.cpp

@@ -9,7 +9,7 @@
 #include <LibWeb/DOM/Event.h>
 #include <LibWeb/HTML/BrowsingContext.h>
 #include <LibWeb/HTML/BrowsingContextContainer.h>
-#include <LibWeb/Origin.h>
+#include <LibWeb/HTML/Origin.h>
 #include <LibWeb/Page/Page.h>
 
 namespace Web::HTML {

Userland/Libraries/LibWeb/HTML/HTMLIFrameElement.cpp

@@ -8,8 +8,8 @@
 #include <LibWeb/DOM/Event.h>
 #include <LibWeb/HTML/BrowsingContext.h>
 #include <LibWeb/HTML/HTMLIFrameElement.h>
+#include <LibWeb/HTML/Origin.h>
 #include <LibWeb/Layout/FrameBox.h>
-#include <LibWeb/Origin.h>
 
 namespace Web::HTML {
 

Userland/Libraries/LibWeb/HTML/Origin.h

@@ -0,0 +1,114 @@
+/*
+ * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
+ * Copyright (c) 2022, Linus Groh <linusg@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/String.h>
+
+namespace Web::HTML {
+
+class Origin {
+public:
+    Origin() = default;
+    Origin(String const& protocol, String const& host, u16 port)
+        : m_protocol(protocol)
+        , m_host(host)
+        , m_port(port)
+    {
+    }
+
+    // https://html.spec.whatwg.org/multipage/origin.html#concept-origin-opaque
+    bool is_opaque() const { return m_protocol.is_null() && m_host.is_null() && m_port == 0; }
+
+    String const& protocol() const { return m_protocol; }
+    String const& host() const { return m_host; }
+    u16 port() const { return m_port; }
+
+    // https://html.spec.whatwg.org/multipage/origin.html#same-origin
+    bool is_same_origin(Origin const& other) const
+    {
+        // 1. If A and B are the same opaque origin, then return true.
+        if (is_opaque() && other.is_opaque())
+            return true;
+
+        // 2. If A and B are both tuple origins and their schemes, hosts, and port are identical, then return true.
+        // 3. Return false.
+        return protocol() == other.protocol()
+            && host() == other.host()
+            && port() == other.port();
+    }
+
+    // https://html.spec.whatwg.org/multipage/origin.html#same-origin-domain
+    bool is_same_origin_domain(Origin const& other) const
+    {
+        // 1. If A and B are the same opaque origin, then return true.
+        if (is_opaque() && other.is_opaque())
+            return true;
+
+        // 2. If A and B are both tuple origins, run these substeps:
+        if (!is_opaque() && !other.is_opaque()) {
+            // 1. If A and B's schemes are identical, and their domains are identical and non-null, then return true.
+            // FIXME: Check domains once supported.
+            if (protocol() == other.protocol())
+                return true;
+
+            // 2. Otherwise, if A and B are same origin and their domains are identical and null, then return true.
+            // FIXME: Check domains once supported.
+            if (is_same_origin(other))
+                return true;
+        }
+
+        // 3. Return false.
+        return false;
+    }
+
+    // https://html.spec.whatwg.org/multipage/origin.html#ascii-serialisation-of-an-origin
+    String serialize()
+    {
+        // 1. If origin is an opaque origin, then return "null"
+        if (is_opaque())
+            return "null";
+
+        // 2. Otherwise, let result be origin's scheme.
+        StringBuilder result;
+        result.append(protocol());
+
+        // 3. Append "://" to result.
+        result.append("://"sv);
+
+        // 4. Append origin's host, serialized, to result.
+        result.append(host());
+
+        // 5. If origin's port is non-null, append a U+003A COLON character (:), and origin's port, serialized, to result.
+        if (port() != 0) {
+            result.append(':');
+            result.append(String::number(port()));
+        }
+        // 6. Return result
+        return result.to_string();
+    }
+
+    bool operator==(Origin const& other) const { return is_same_origin(other); }
+    bool operator!=(Origin const& other) const { return !is_same_origin(other); }
+
+private:
+    String m_protocol;
+    String m_host;
+    u16 m_port { 0 };
+};
+
+}
+
+namespace AK {
+template<>
+struct Traits<Web::HTML::Origin> : public GenericTraits<Web::HTML::Origin> {
+    static unsigned hash(Web::HTML::Origin const& origin)
+    {
+        return pair_int_hash(origin.protocol().hash(), pair_int_hash(int_hash(origin.port()), origin.host().hash()));
+    }
+};
+} // namespace AK

Userland/Libraries/LibWeb/HTML/Scripting/Environments.h

@@ -14,7 +14,7 @@
 #include <LibJS/Runtime/Realm.h>
 #include <LibWeb/HTML/BrowsingContext.h>
 #include <LibWeb/HTML/EventLoop/EventLoop.h>
-#include <LibWeb/Origin.h>
+#include <LibWeb/HTML/Origin.h>
 
 namespace Web::HTML {