style: Move user-select outside of mako.

This is the first step to unprefix user-select.

This has no behavior change, it's just a nicer way to do the same thing which
allows us to unship individual values more easily using parse(condition).

Differential Revision: https://phabricator.services.mozilla.com/D11580

components/style/cbindgen.toml

@@ -53,5 +53,6 @@ include = [
   "TimingFunction",
   "PathCommand",
   "UnicodeRange",
+  "UserSelect",
 ]
 item_types = ["enums", "structs", "typedefs"]

components/style/properties/data.py

@@ -336,6 +336,7 @@ class Longhand(object):
                 "TextEmphasisPosition",
                 "TouchAction",
                 "TransformStyle",
+                "UserSelect",
                 "XSpan",
                 "XTextZoom",
                 "ZIndex",

components/style/properties/gecko.mako.rs

@@ -1429,6 +1429,7 @@ impl Clone for ${style_struct.gecko_struct_name} {
         "SVGWidth": impl_svg_length,
         "Transform": impl_transform,
         "TransformOrigin": impl_transform_origin,
+        "UserSelect": impl_simple,
         "url::UrlOrNone": impl_css_url,
     }
 

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

@@ -31,16 +31,15 @@ ${helpers.single_keyword(
     spec="https://drafts.csswg.org/css-scrollbars-1/#scrollbar-width"
 )}
 
-${helpers.single_keyword(
+${helpers.predefined_type(
     "-moz-user-select",
-    "auto text none all element elements toggle tri-state -moz-all -moz-text",
+    "UserSelect",
+    "computed::UserSelect::Auto",
     products="gecko",
-    alias="-webkit-user-select",
     gecko_ffi_name="mUserSelect",
-    gecko_enum_prefix="StyleUserSelect",
+    alias="-webkit-user-select",
-    gecko_strip_moz_prefix=False,
-    aliases="-moz-none=none",
     animation_value_type="discrete",
+    needs_context=False,
     spec="https://drafts.csswg.org/css-ui-4/#propdef-user-select",
 )}
 

components/style/values/computed/mod.rs

@@ -84,7 +84,7 @@ pub use self::transform::{Rotate, Scale, Transform, TransformOperation};
 pub use self::transform::{TransformOrigin, TransformStyle, Translate};
 #[cfg(feature = "gecko")]
 pub use self::ui::CursorImage;
-pub use self::ui::{ColorOrAuto, Cursor, MozForceBrokenImageIcon};
+pub use self::ui::{ColorOrAuto, Cursor, MozForceBrokenImageIcon, UserSelect};
 pub use super::specified::{BorderStyle, TextDecorationLine};
 pub use super::{Auto, Either, None_};
 pub use app_units::Au;

components/style/values/computed/ui.rs

@@ -10,7 +10,7 @@ use crate::values::computed::Number;
 use crate::values::generics::ui as generics;
 use crate::values::{Auto, Either};
 
-pub use crate::values::specified::ui::MozForceBrokenImageIcon;
+pub use crate::values::specified::ui::{MozForceBrokenImageIcon, UserSelect};
 
 /// auto | <color>
 pub type ColorOrAuto = Either<Color, Auto>;

components/style/values/specified/mod.rs

@@ -82,7 +82,7 @@ pub use self::transform::{Rotate, Scale, Transform};
 pub use self::transform::{TransformOrigin, TransformStyle, Translate};
 #[cfg(feature = "gecko")]
 pub use self::ui::CursorImage;
-pub use self::ui::{ColorOrAuto, Cursor, MozForceBrokenImageIcon};
+pub use self::ui::{ColorOrAuto, Cursor, MozForceBrokenImageIcon, UserSelect};
 pub use super::generics::grid::GridTemplateComponent as GenericGridTemplateComponent;
 
 #[cfg(feature = "gecko")]

components/style/values/specified/ui.rs

@@ -140,3 +140,39 @@ impl Parse for ScrollbarColor {
         })
     }
 }
+
+/// The specified value for the `user-select` property.
+///
+/// https://drafts.csswg.org/css-ui-4/#propdef-user-select
+#[allow(missing_docs)]
+#[derive(
+    Clone,
+    Copy,
+    Debug,
+    Eq,
+    MallocSizeOf,
+    Parse,
+    PartialEq,
+    SpecifiedValueInfo,
+    ToComputedValue,
+    ToCss,
+)]
+#[repr(u8)]
+pub enum UserSelect {
+    Auto,
+    Text,
+    #[parse(aliases = "-moz-none")]
+    None,
+    Element,
+    Elements,
+    All,
+    Toggle,
+    TriState,
+    /// Force selection of all children, unless an ancestor has `none` set.
+    ///
+    /// See bug 48096.
+    MozAll,
+    /// Like `text`, except that it won't get overridden by ancestors having
+    /// `all`.
+    MozText,
+}