Split layout_2020/flexbox.rs into modules

components/layout_2020/flexbox/mod.rs

@@ -0,0 +1,21 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+use crate::cell::ArcRefCell;
+use crate::formatting_contexts::IndependentFormattingContext;
+use crate::positioned::AbsolutelyPositionedBox;
+
+mod construct;
+mod layout;
+
+#[derive(Debug, Serialize)]
+pub(crate) struct FlexContainer {
+    children: Vec<ArcRefCell<FlexLevelBox>>,
+}
+
+#[derive(Debug, Serialize)]
+pub(crate) enum FlexLevelBox {
+    FlexItem(IndependentFormattingContext),
+    OutOfFlowAbsolutelyPositionedBox(ArcRefCell<AbsolutelyPositionedBox>),
+}