Rollup merge of #103251 - GuillaumeGomez:item-decl-highlighting, r=notriddle

Fix item declaration highlighting

Fixes https://github.com/rust-lang/rust/issues/103050.

As mentioned in the issue, https://github.com/rust-lang/rust/pull/102924 introduced this regression. This PR partially reverts it and adds a regression test.

r? `@notriddle`

src/librustdoc/html/static/css/rustdoc.css

@@ -229,44 +229,44 @@ h1 a,
 	color: var(--main-color);
 }
 
-span.enum, a.enum,
-span.struct, a.struct,
-span.union, a.union,
-span.primitive, a.primitive,
-span.type, a.type,
-span.foreigntype, a.foreigntype {
+.content span.enum, .content a.enum,
+.content span.struct, .content a.struct,
+.content span.union, .content a.union,
+.content span.primitive, .content a.primitive,
+.content span.type, .content a.type,
+.content span.foreigntype, .content a.foreigntype {
 	color: var(--type-link-color);
 }
 
-span.trait, a.trait,
-span.traitalias, a.traitalias {
+.content span.trait, .content a.trait,
+.content span.traitalias, .content a.traitalias {
 	color: var(--trait-link-color);
 }
 
-span.associatedtype, a.associatedtype,
-span.constant, a.constant,
-span.static, a.static {
+.content span.associatedtype, .content a.associatedtype,
+.content span.constant, .content a.constant,
+.content span.static, .content a.static {
 	color: var(--assoc-item-link-color);
 }
 
-span.fn, a.fn,
-.fnname,
-span.method, a.method,
-span.tymethod, a.tymethod {
+.content span.fn, .content a.fn,
+.content .fnname,
+.content span.method, .content a.method,
+.content span.tymethod, .content a.tymethod {
 	color: var(--function-link-color);
 }
 
-span.attr, a.attr,
-span.derive, a.derive,
-span.macro, a.macro {
+.content span.attr, .content a.attr,
+.content span.derive, .content a.derive,
+.content span.macro, .content a.macro {
 	color: var(--macro-link-color);
 }
 
-span.mod, a.mod {
+.content span.mod, .content a.mod {
 	color: var(--mod-link-color);
 }
 
-span.keyword, a.keyword {
+.content span.keyword, .content a.keyword {
 	color: var(--keyword-link-color);
 }
 

src/test/rustdoc-gui/item-decl-colors.goml

@@ -0,0 +1,74 @@
+// This test ensures that the color of the items in the type decl are working as expected.
+define-function: (
+    "check-colors",
+    (
+        theme,
+        attr_color,
+        trait_color,
+        struct_color,
+        enum_color,
+        primitive_color,
+        constant_color,
+        fn_color,
+        assoc_type_color,
+    ),
+    [
+        ("goto", "file://" + |DOC_PATH| + "/test_docs/struct.WithGenerics.html"),
+        ("show-text", true),
+        ("local-storage", {"rustdoc-theme": |theme|, "rustdoc-use-system-theme": "false"}),
+        ("reload"),
+        ("assert-css", (".item-decl .code-attribute", {"color": |attr_color|}, ALL)),
+        ("assert-css", (".item-decl .trait", {"color": |trait_color|}, ALL)),
+        // We need to add `code` here because otherwise it would select the parent too.
+        ("assert-css", (".item-decl code .struct", {"color": |struct_color|}, ALL)),
+        ("assert-css", (".item-decl .enum", {"color": |enum_color|}, ALL)),
+        ("assert-css", (".item-decl .primitive", {"color": |primitive_color|}, ALL)),
+        ("goto", "file://" + |DOC_PATH| + "/test_docs/trait.TraitWithoutGenerics.html"),
+        ("assert-css", (".item-decl .constant", {"color": |constant_color|}, ALL)),
+        ("assert-css", (".item-decl .fnname", {"color": |fn_color|}, ALL)),
+        ("assert-css", (".item-decl .associatedtype", {"color": |assoc_type_color|}, ALL)),
+    ],
+)
+
+call-function: (
+    "check-colors",
+    {
+        "theme": "ayu",
+        "attr_color": "rgb(153, 153, 153)",
+        "trait_color": "rgb(57, 175, 215)",
+        "struct_color": "rgb(255, 160, 165)",
+        "enum_color": "rgb(255, 160, 165)",
+        "primitive_color": "rgb(255, 160, 165)",
+        "constant_color": "rgb(57, 175, 215)",
+        "fn_color": "rgb(253, 214, 135)",
+        "assoc_type_color": "rgb(57, 175, 215)",
+    },
+)
+call-function: (
+    "check-colors",
+    {
+        "theme": "dark",
+        "attr_color": "rgb(153, 153, 153)",
+        "trait_color": "rgb(183, 140, 242)",
+        "struct_color": "rgb(45, 191, 184)",
+        "enum_color": "rgb(45, 191, 184)",
+        "primitive_color": "rgb(45, 191, 184)",
+        "constant_color": "rgb(210, 153, 29)",
+        "fn_color": "rgb(43, 171, 99)",
+        "assoc_type_color": "rgb(210, 153, 29)",
+    },
+)
+call-function: (
+    "check-colors",
+    {
+        "theme": "light",
+        "attr_color": "rgb(153, 153, 153)",
+        "trait_color": "rgb(110, 79, 201)",
+        "struct_color": "rgb(173, 55, 138)",
+        "enum_color": "rgb(173, 55, 138)",
+        "primitive_color": "rgb(173, 55, 138)",
+        "constant_color": "rgb(56, 115, 173)",
+        "fn_color": "rgb(173, 124, 55)",
+        "assoc_type_color": "rgb(56, 115, 173)",
+    },
+)

src/test/rustdoc-gui/sidebar.goml

@@ -20,11 +20,12 @@ assert-text: (".sidebar-elems section ul > li:nth-child(2)", "Modules")
 assert-text: (".sidebar-elems section ul > li:nth-child(3)", "Macros")
 assert-text: (".sidebar-elems section ul > li:nth-child(4)", "Structs")
 assert-text: (".sidebar-elems section ul > li:nth-child(5)", "Enums")
-assert-text: (".sidebar-elems section ul > li:nth-child(6)", "Traits")
-assert-text: (".sidebar-elems section ul > li:nth-child(7)", "Functions")
-assert-text: (".sidebar-elems section ul > li:nth-child(8)", "Type Definitions")
-assert-text: (".sidebar-elems section ul > li:nth-child(9)", "Unions")
-assert-text: (".sidebar-elems section ul > li:nth-child(10)", "Keywords")
+assert-text: (".sidebar-elems section ul > li:nth-child(6)", "Constants")
+assert-text: (".sidebar-elems section ul > li:nth-child(7)", "Traits")
+assert-text: (".sidebar-elems section ul > li:nth-child(8)", "Functions")
+assert-text: (".sidebar-elems section ul > li:nth-child(9)", "Type Definitions")
+assert-text: (".sidebar-elems section ul > li:nth-child(10)", "Unions")
+assert-text: (".sidebar-elems section ul > li:nth-child(11)", "Keywords")
 assert-text: ("#structs + .item-table .item-left > a", "Foo")
 click: "#structs + .item-table .item-left > a"
 

src/test/rustdoc-gui/src/test_docs/lib.rs

@@ -5,6 +5,7 @@
 #![crate_name = "test_docs"]
 #![feature(rustdoc_internals)]
 #![feature(doc_cfg)]
+#![feature(associated_type_defaults)]
 
 /*!
 Enable the feature <span class="stab portability"><code>some-feature</code></span> to enjoy
@@ -386,3 +387,20 @@ impl TypeWithNoDocblocks {
 pub unsafe fn unsafe_fn() {}
 
 pub fn safe_fn() {}
+
+#[repr(C)]
+pub struct WithGenerics<T: TraitWithNoDocblocks, S = String, E = WhoLetTheDogOut, P = i8> {
+    s: S,
+    t: T,
+    e: E,
+    p: P,
+}
+
+pub const CONST: u8 = 0;
+
+pub trait TraitWithoutGenerics {
+    const C: u8 = CONST;
+    type T = SomeType;
+
+    fn foo();
+}