style: Style changes to support the 'page-orientation' property

Differential Revision: https://phabricator.services.mozilla.com/D161800

components/style/properties/data.py

@@ -476,6 +476,7 @@ class Longhand(Property):
                 "OverflowClipBox",
                 "OverflowWrap",
                 "OverscrollBehavior",
+                "PageOrientation",
                 "Percentage",
                 "PrintColorAdjust",
                 "Resize",

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

@@ -29,3 +29,15 @@ ${helpers.predefined_type(
     spec="https://drafts.csswg.org/css-page-3/#using-named-pages",
     animation_value_type="discrete",
 )}
+
+${helpers.predefined_type(
+    "page-orientation",
+    "PageOrientation",
+    "computed::PageOrientation::Upright",
+    engines="gecko",
+    gecko_pref="layout.css.page-orientation.enabled",
+    initial_specified_value="specified::PageOrientation::Upright",
+    spec="https://drafts.csswg.org/css-page-3/#page-orientation-prop",
+    animation_value_type="none",
+    rule_types_allowed=PAGE_RULE,
+)}

components/style/values/computed/mod.rs

@@ -81,7 +81,7 @@ pub use self::list::ListStyleType;
 pub use self::list::Quotes;
 pub use self::motion::{OffsetPath, OffsetRotate};
 pub use self::outline::OutlineStyle;
-pub use self::page::{PageName, PageSize, PageSizeOrientation, PaperSize};
+pub use self::page::{PageName, PageOrientation, PageSize, PageSizeOrientation, PaperSize};
 pub use self::percentage::{NonNegativePercentage, Percentage};
 pub use self::position::AspectRatio;
 pub use self::position::{

components/style/values/computed/page.rs

@@ -11,6 +11,7 @@ use crate::values::generics::size::Size2D;
 
 use crate::values::specified::page as specified;
 pub use generics::page::GenericPageSize;
+pub use generics::page::PageOrientation;
 pub use generics::page::PageSizeOrientation;
 pub use generics::page::PaperSize;
 pub use specified::PageName;

components/style/values/generics/page.rs

@@ -70,6 +70,22 @@ impl PaperSize {
     }
 }
 
+/// Page orientation names.
+///
+/// https://drafts.csswg.org/css-page-3/#page-orientation-prop
+#[derive(
+    Clone, Copy, Debug, Eq, MallocSizeOf, Parse, PartialEq, SpecifiedValueInfo, ToComputedValue, ToCss, ToResolvedValue, ToShmem,
+)]
+#[repr(u8)]
+pub enum PageOrientation {
+    /// upright
+    Upright,
+    /// rotate-left (counter-clockwise)
+    RotateLeft,
+    /// rotate-right (clockwise)
+    RotateRight,
+}
+
 /// Paper orientation
 ///
 /// https://drafts.csswg.org/css-page-3/#page-size-prop

components/style/values/specified/mod.rs

@@ -72,7 +72,7 @@ pub use self::list::ListStyleType;
 pub use self::list::Quotes;
 pub use self::motion::{OffsetPath, OffsetRotate};
 pub use self::outline::OutlineStyle;
-pub use self::page::{PageName, PageSize, PageSizeOrientation, PaperSize};
+pub use self::page::{PageName, PageOrientation, PageSize, PageSizeOrientation, PaperSize};
 pub use self::percentage::{NonNegativePercentage, Percentage};
 pub use self::position::AspectRatio;
 pub use self::position::{

components/style/values/specified/page.rs

@@ -11,6 +11,7 @@ use crate::values::{generics, CustomIdent};
 use cssparser::Parser;
 use style_traits::ParseError;
 
+pub use generics::page::PageOrientation;
 pub use generics::page::PageSizeOrientation;
 pub use generics::page::PaperSize;
 /// Specified value of the @page size descriptor