Everywhere: Hoist the Libraries folder to the top-level

Author: https://github.com/trflynn89
Commit: 93712b24bf
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2256
Reviewed-by: https://github.com/sideshowbarker

Libraries/LibWeb/Layout/BoxModelMetrics.cpp

@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2018-2020, Andreas Kling <andreas@ladybird.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibWeb/Layout/BoxModelMetrics.h>
+
+namespace Web::Layout {
+
+PixelBox BoxModelMetrics::margin_box() const
+{
+    return {
+        margin.top + border.top + padding.top,
+        margin.right + border.right + padding.right,
+        margin.bottom + border.bottom + padding.bottom,
+        margin.left + border.left + padding.left,
+    };
+}
+
+PixelBox BoxModelMetrics::padding_box() const
+{
+    return {
+        padding.top,
+        padding.right,
+        padding.bottom,
+        padding.left,
+    };
+}
+
+PixelBox BoxModelMetrics::border_box() const
+{
+    return {
+        border.top + padding.top,
+        border.right + padding.right,
+        border.bottom + padding.bottom,
+        border.left + padding.left,
+    };
+}
+
+}