servo: Merge #19956 - Generate some PropertyDeclaration methods by hand 🐉🐲 (from servo:derive-all-the-things); r=emilio

We rely on rust-lang/rfcs#2195 to make some enums share the same discriminants by definition.

This fixes https://bugzilla.mozilla.org/show_bug.cgi?id=1428285.

Source-Repo: https://github.com/servo/servo
Source-Revision: 9faf0cdce50379dfb8125d7a9c913babd56382e2

UltraBlame original commit: 8bd0a2507ccbb5fad4588e43bbca20eead87a2bb

Author: marco-c

servo/components/style/properties/data.py

@@ -149,6 +149,7 @@ def __init__(self, style_struct, name, spec=None, animation_value_type=None, key
                  predefined_type=None, servo_pref=None, gecko_pref=None,
                  enabled_in="content", need_index=False,
                  gecko_ffi_name=None,
+                 is_gecko_size_type_hack=False,
                  allowed_in_keyframe_block=True, cast_type='u8',
                  logical=False, alias=None, extra_prefixes=None, boxed=False,
                  flags=None, allowed_in_page_rule=False, allow_quirks=False, ignored_when_colors_disabled=False,
@@ -185,6 +186,7 @@ def __init__(self, style_struct, name, spec=None, animation_value_type=None, key
         self.allow_quirks = allow_quirks
         self.ignored_when_colors_disabled = ignored_when_colors_disabled
         self.is_vector = vector
+        self.is_gecko_size_type_hack = is_gecko_size_type_hack
 
 
 

servo/components/style/properties/declaration_block.rs

@@ -430,7 +430,9 @@ impl PropertyDeclarationBlock {
             AllShorthand::NotSet => {}
             AllShorthand::CSSWideKeyword(keyword) => {
                 for &id in ShorthandId::All.longhands() {
-                    let decl = PropertyDeclaration::CSSWideKeyword(id, keyword);
+                    let decl = PropertyDeclaration::CSSWideKeyword(
+                        WideKeywordDeclaration { id, keyword },
+                    );
                     changed |= self.push(
                         decl,
                         importance,
@@ -440,7 +442,9 @@ impl PropertyDeclarationBlock {
             }
             AllShorthand::WithVariables(unparsed) => {
                 for &id in ShorthandId::All.longhands() {
-                    let decl = PropertyDeclaration::WithVariables(id, unparsed.clone());
+                    let decl = PropertyDeclaration::WithVariables(
+                        VariableDeclaration { id, value: unparsed.clone() },
+                    );
                     changed |= self.push(
                         decl,
                         importance,
@@ -639,14 +643,15 @@ impl PropertyDeclarationBlock {
 
 
 
-                        (&PropertyDeclaration::WithVariables(id, ref unparsed),
-                         Some(ref _computed_values)) => {
-                            unparsed.substitute_variables(
-                                id,
+                        (
+                            &PropertyDeclaration::WithVariables(ref declaration),
+                            Some(ref _computed_values),
+                        ) => {
+                            declaration.value.substitute_variables(
+                                declaration.id,
                                 custom_properties.as_ref(),
                                 QuirksMode::NoQuirks,
-                            )
-                            .to_css(dest)
+                            ).to_css(dest)
                         },
                         (ref d, _) => d.to_css(dest),
                     }
@@ -726,8 +731,8 @@ impl PropertyDeclarationBlock {
         let mut builder = CustomPropertiesBuilder::new(inherited_custom_properties);
 
         for declaration in self.normal_declaration_iter() {
-            if let PropertyDeclaration::Custom(ref name, ref value) = *declaration {
-                builder.cascade(name, value.borrow());
+            if let PropertyDeclaration::Custom(ref declaration) = *declaration {
+                builder.cascade(&declaration.name, declaration.value.borrow());
             }
         }
 

servo/components/style/properties/helpers.mako.rs

@@ -302,9 +302,9 @@
                 PropertyDeclaration::${property.camel_case}(ref value) => {
                     DeclaredValue::Value(value)
                 },
-                PropertyDeclaration::CSSWideKeyword(id, value) => {
-                    debug_assert!(id == LonghandId::${property.camel_case});
-                    DeclaredValue::CSSWideKeyword(value)
+                PropertyDeclaration::CSSWideKeyword(ref declaration) => {
+                    debug_assert!(declaration.id == LonghandId::${property.camel_case});
+                    DeclaredValue::CSSWideKeyword(declaration.keyword)
                 },
                 PropertyDeclaration::WithVariables(..) => {
                     panic!("variables should already have been substituted")
@@ -903,6 +903,7 @@
     <%call expr="longhand(name,
                           predefined_type=length_type,
                           logical=logical,
+                          is_gecko_size_type_hack=True,
                           **kwargs)">
         % if not logical:
             use values::specified::AllowQuirks;

servo/components/style/properties/helpers/animated_properties.mako.rs

@@ -435,14 +435,14 @@ impl AnimationValue {
             },
             % endif
             % endfor
-            PropertyDeclaration::CSSWideKeyword(id, keyword) => {
-                match id {
+            PropertyDeclaration::CSSWideKeyword(ref declaration) => {
+                match declaration.id {
                     // We put all the animatable properties first in the hopes
                     // that it might increase match locality.
                     % for prop in data.longhands:
                     % if prop.animatable:
                     LonghandId::${prop.camel_case} => {
-                        let style_struct = match keyword {
+                        let style_struct = match declaration.keyword {
                             % if not prop.style_struct.inherited:
                                 CSSWideKeyword::Unset |
                             % endif
@@ -472,15 +472,15 @@ impl AnimationValue {
                     % endfor
                 }
             },
-            PropertyDeclaration::WithVariables(id, ref unparsed) => {
+            PropertyDeclaration::WithVariables(ref declaration) => {
                 let substituted = {
                     let custom_properties =
                         extra_custom_properties.or_else(|| context.style().custom_properties());
 
-                    unparsed.substitute_variables(
-                        id,
+                    declaration.value.substitute_variables(
+                        declaration.id,
                         custom_properties,
-                        context.quirks_mode
+                        context.quirks_mode,
                     )
                 };
                 return AnimationValue::from_declaration(