style: Move caption-side outside of mako.

Make it an enum class, etc.

Differential Revision: https://phabricator.services.mozilla.com/D103978

components/style/properties/data.py

@@ -399,6 +399,7 @@ class Longhand(object):
                 "BackgroundRepeat",
                 "BorderImageRepeat",
                 "BorderStyle",
+                "table::CaptionSide",
                 "Clear",
                 "ColumnCount",
                 "Contain",

components/style/properties/longhands/inherited_table.mako.rs

@@ -26,12 +26,12 @@ ${helpers.single_keyword(
     servo_restyle_damage="rebuild_and_reflow",
 )}
 
-${helpers.single_keyword(
+${helpers.predefined_type(
     "caption-side",
-    "top bottom",
+    "table::CaptionSide",
+    "computed::table::CaptionSide::Top",
+    needs_context=False,
     engines="gecko servo-2013",
-    extra_gecko_values="right left top-outside bottom-outside",
-    needs_conversion="True",
     animation_value_type="discrete",
     spec="https://drafts.csswg.org/css-tables/#propdef-caption-side",
     servo_restyle_damage="rebuild_and_reflow",
@@ -46,5 +46,5 @@ ${helpers.predefined_type(
     animation_value_type="BorderSpacing",
     boxed=True,
     spec="https://drafts.csswg.org/css-tables/#propdef-border-spacing",
-    servo_restyle_damage = "reflow",
+    servo_restyle_damage="reflow",
 )}

components/style/values/computed/mod.rs

@@ -125,6 +125,7 @@ pub mod position;
 pub mod rect;
 pub mod resolution;
 pub mod svg;
+pub mod table;
 pub mod text;
 pub mod time;
 pub mod transform;

components/style/values/computed/table.rs

@@ -0,0 +1,7 @@
+/* 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/. */
+
+//! Computed types for CSS values related to tables.
+
+pub use super::specified::table::CaptionSide;

components/style/values/specified/mod.rs

@@ -129,6 +129,7 @@ pub mod resolution;
 pub mod source_size_list;
 pub mod svg;
 pub mod svg_path;
+pub mod table;
 pub mod text;
 pub mod time;
 pub mod transform;

components/style/values/specified/table.rs

@@ -0,0 +1,45 @@
+/* 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/. */
+
+//! Specified types for CSS values related to tables.
+
+/// Specified values for the `caption-side` property.
+///
+/// Note that despite having "physical" names, these are actually interpreted
+/// according to the table's writing-mode: Top and Bottom are treated as
+/// block-start and -end respectively, and Left and Right are treated as
+/// line-start and -end.
+///
+/// https://drafts.csswg.org/css-tables/#propdef-caption-side
+#[allow(missing_docs)]
+#[derive(
+    Clone,
+    Copy,
+    Debug,
+    Eq,
+    FromPrimitive,
+    MallocSizeOf,
+    Ord,
+    Parse,
+    PartialEq,
+    PartialOrd,
+    SpecifiedValueInfo,
+    ToComputedValue,
+    ToCss,
+    ToResolvedValue,
+    ToShmem,
+)]
+#[repr(u8)]
+pub enum CaptionSide {
+    Top,
+    Bottom,
+    #[cfg(feature = "gecko")]
+    Right,
+    #[cfg(feature = "gecko")]
+    Left,
+    #[cfg(feature = "gecko")]
+    TopOutside,
+    #[cfg(feature = "gecko")]
+    BottomOutside,
+}