Make layout_2020 be layout_2013

components/layout_2020/data.rs

@@ -0,0 +1,68 @@
+/* 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::construct::ConstructionResult;
+use atomic_refcell::AtomicRefCell;
+use script_layout_interface::StyleData;
+
+#[repr(C)]
+pub struct StyleAndLayoutData {
+    /// Data accessed by script_layout_interface. This must be first to allow
+    /// casting between StyleAndLayoutData and StyleData.
+    pub style_data: StyleData,
+    /// The layout data associated with a node.
+    pub layout_data: AtomicRefCell<LayoutData>,
+}
+
+impl StyleAndLayoutData {
+    pub fn new() -> Self {
+        Self {
+            style_data: StyleData::new(),
+            layout_data: AtomicRefCell::new(LayoutData::new()),
+        }
+    }
+}
+
+/// Data that layout associates with a node.
+#[repr(C)]
+pub struct LayoutData {
+    /// The current results of flow construction for this node. This is either a
+    /// flow or a `ConstructionItem`. See comments in `construct.rs` for more
+    /// details.
+    pub flow_construction_result: ConstructionResult,
+
+    pub before_flow_construction_result: ConstructionResult,
+
+    pub after_flow_construction_result: ConstructionResult,
+
+    pub details_summary_flow_construction_result: ConstructionResult,
+
+    pub details_content_flow_construction_result: ConstructionResult,
+
+    /// Various flags.
+    pub flags: LayoutDataFlags,
+}
+
+impl LayoutData {
+    /// Creates new layout data.
+    pub fn new() -> LayoutData {
+        Self {
+            flow_construction_result: ConstructionResult::None,
+            before_flow_construction_result: ConstructionResult::None,
+            after_flow_construction_result: ConstructionResult::None,
+            details_summary_flow_construction_result: ConstructionResult::None,
+            details_content_flow_construction_result: ConstructionResult::None,
+            flags: LayoutDataFlags::empty(),
+        }
+    }
+}
+
+bitflags! {
+    pub struct LayoutDataFlags: u8 {
+        #[doc = "Whether a flow has been newly constructed."]
+        const HAS_NEWLY_CONSTRUCTED_FLOW = 0x01;
+        #[doc = "Whether this node has been traversed by layout."]
+        const HAS_BEEN_TRAVERSED = 0x02;
+    }
+}