Revert "Backport several style changes from Gecko (5) (#30099)" (#30104)

This reverts commit 8e15389cae.

tests/unit/style/Cargo.toml

@@ -21,6 +21,7 @@ servo_arc = {path = "../../../components/servo_arc"}
 servo_atoms = {path = "../../../components/atoms"}
 servo_config = {path = "../../../components/config"}
 servo_url = {path = "../../../components/url"}
+size_of_test = {path = "../../../components/size_of_test"}
 style = {path = "../../../components/style", features = ["servo"]}
 style_traits = {path = "../../../components/style_traits"}
 std_test_override = { path = "../../../components/std_test_override" }

tests/unit/style/lib.rs

@@ -16,6 +16,9 @@ extern crate serde_json;
 extern crate servo_arc;
 extern crate servo_atoms;
 extern crate servo_url;
+#[macro_use]
+extern crate size_of_test;
+#[macro_use]
 extern crate style;
 extern crate style_traits;
 extern crate test;
@@ -27,6 +30,8 @@ mod logical_geometry;
 mod parsing;
 mod properties;
 mod rule_tree;
+mod size_of;
+mod specified_values;
 mod str;
 mod stylesheets;
 mod stylist;

tests/unit/style/size_of.rs

@@ -0,0 +1,51 @@
+/* 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 selectors::parser::{SelectorParseError, SelectorParseErrorKind};
+use style::invalidation::element::invalidation_map::Dependency;
+use style::properties;
+
+size_of_test!(test_size_of_dependency, Dependency, 24);
+
+size_of_test!(
+    test_size_of_property_declaration,
+    properties::PropertyDeclaration,
+    32
+);
+
+// This is huge, but we allocate it on the stack and then never move it,
+// we only pass `&mut SourcePropertyDeclaration` references around.
+size_of_test!(
+    test_size_of_parsed_declaration,
+    properties::SourcePropertyDeclaration,
+    568
+);
+
+size_of_test!(
+    test_size_of_selector_parse_error_kind,
+    SelectorParseErrorKind,
+    40
+);
+size_of_test!(
+    test_size_of_style_parse_error_kind,
+    ::style_traits::StyleParseErrorKind,
+    56
+);
+size_of_test!(
+    test_size_of_value_parse_error_kind,
+    ::style_traits::ValueParseErrorKind,
+    40
+);
+
+size_of_test!(test_size_of_selector_parse_error, SelectorParseError, 48);
+size_of_test!(
+    test_size_of_style_traits_parse_error,
+    ::style_traits::ParseError,
+    64
+);
+size_of_test!(
+    test_size_of_value_parse_error,
+    ::style_traits::ValueParseError,
+    48
+);

tests/unit/style/specified_values.rs

@@ -0,0 +1,50 @@
+/* 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 style;
+
+#[cfg(all(test, target_pointer_width = "64"))]
+#[test]
+fn size_of_specified_values() {
+    use std::mem::size_of;
+    let threshold = 24;
+
+    let mut bad_properties = vec![];
+
+    macro_rules! check_property {
+        ( $( { $name: ident, $boxed: expr } )+ ) => {
+            $(
+                let size = size_of::<style::properties::longhands::$name::SpecifiedValue>();
+                let is_boxed = $boxed;
+                if (!is_boxed && size > threshold) || (is_boxed && size <= threshold) {
+                    bad_properties.push((stringify!($name), size, is_boxed));
+                }
+            )+
+        }
+    }
+
+    longhand_properties_idents!(check_property);
+
+    let mut failing_messages = vec![];
+
+    for bad_prop in bad_properties {
+        if !bad_prop.2 {
+            failing_messages.push(
+                format!("Your changes have increased the size of {} SpecifiedValue to {}. The threshold is \
+                        currently {}. SpecifiedValues affect size of PropertyDeclaration enum and \
+                        increasing the size may negative affect style system performance. Please consider \
+                        using `boxed=\"True\"` in this longhand.",
+                        bad_prop.0, bad_prop.1, threshold));
+        } else if bad_prop.2 {
+            failing_messages.push(
+                format!("Your changes have decreased the size of {} SpecifiedValue to {}. Good work! \
+                        The threshold is currently {}. Please consider removing `boxed=\"True\"` from this longhand.",
+                        bad_prop.0, bad_prop.1, threshold));
+        }
+    }
+
+    if !failing_messages.is_empty() {
+        panic!("{}", failing_messages.join("\n\n"));
+    }
+}

tests/unit/style/stylist.rs

@@ -16,9 +16,10 @@ use style::properties::{PropertyDeclaration, PropertyDeclarationBlock};
 use style::selector_map::SelectorMap;
 use style::selector_parser::{SelectorImpl, SelectorParser};
 use style::shared_lock::SharedRwLock;
+use style::stylesheets::layer_rule::LayerId;
 use style::stylesheets::StyleRule;
 use style::stylist::needs_revalidation_for_testing;
-use style::stylist::{ContainerConditionId, LayerId, Rule, Stylist};
+use style::stylist::{Rule, Stylist};
 use style::thread_state::{self, ThreadState};
 
 /// Helper method to get some Rules from selector strings.
@@ -55,7 +56,6 @@ fn get_mock_rules(css_selectors: &[&str]) -> (Vec<Vec<Rule>>, SharedRwLock) {
                             locked.clone(),
                             i as u32,
                             LayerId::root(),
-                            ContainerConditionId::none(),
                         )
                     })
                     .collect()