Split layout_2020/flexbox.rs into modules

components/layout_2020/flexbox/layout.rs

@@ -0,0 +1,33 @@
+/* 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 super::FlexContainer;
+use crate::context::LayoutContext;
+use crate::formatting_contexts::IndependentLayout;
+use crate::positioned::PositioningContext;
+use crate::ContainingBlock;
+use style::values::computed::Length;
+use style::Zero;
+
+// FIXME: `min-width: auto` is not zero: https://drafts.csswg.org/css-flexbox/#min-size-auto
+
+impl FlexContainer {
+    pub(crate) fn layout(
+        &self,
+        layout_context: &LayoutContext,
+        positioning_context: &mut PositioningContext,
+        containing_block: &ContainingBlock,
+        tree_rank: usize,
+    ) -> IndependentLayout {
+        // FIXME
+        let _ = layout_context;
+        let _ = positioning_context;
+        let _ = containing_block;
+        let _ = tree_rank;
+        IndependentLayout {
+            fragments: Vec::new(),
+            content_block_size: Length::zero(),
+        }
+    }
+}