Unify impl blocks by wrapping them into a div

src/librustdoc/html/markdown.rs

@@ -1460,6 +1460,7 @@ fn init_id_map() -> FxHashMap<String, usize> {
     map.insert("provided-methods".to_owned(), 1);
     map.insert("implementors".to_owned(), 1);
     map.insert("synthetic-implementors".to_owned(), 1);
+    map.insert("implementations-list".to_owned(), 1);
     map.insert("trait-implementations-list".to_owned(), 1);
     map.insert("synthetic-implementations-list".to_owned(), 1);
     map.insert("blanket-implementations-list".to_owned(), 1);

src/librustdoc/html/render/mod.rs

@@ -1065,14 +1065,15 @@ fn render_assoc_items_inner(
     let (non_trait, traits): (Vec<_>, _) = v.iter().partition(|i| i.inner_impl().trait_.is_none());
     if !non_trait.is_empty() {
         let mut tmp_buf = Buffer::empty_from(w);
-        let render_mode = match what {
+        let (render_mode, id) = match what {
             AssocItemRender::All => {
                 tmp_buf.write_str(
                     "<h2 id=\"implementations\" class=\"small-section-header\">\
-                         Implementations<a href=\"#implementations\" class=\"anchor\"></a>\
-                    </h2>",
+                         Implementations\
+                         <a href=\"#implementations\" class=\"anchor\"></a>\
+                     </h2>",
                 );
-                RenderMode::Normal
+                (RenderMode::Normal, "implementations-list".to_owned())
             }
             AssocItemRender::DerefFor { trait_, type_, deref_mut_ } => {
                 let id =
@@ -1090,7 +1091,7 @@ fn render_assoc_items_inner(
                     trait_ = trait_.print(cx),
                     type_ = type_.print(cx),
                 );
-                RenderMode::ForDeref { mut_: deref_mut_ }
+                (RenderMode::ForDeref { mut_: deref_mut_ }, cx.derive_id(id))
             }
         };
         let mut impls_buf = Buffer::empty_from(w);
@@ -1115,7 +1116,9 @@ fn render_assoc_items_inner(
         }
         if !impls_buf.is_empty() {
             w.push_buffer(tmp_buf);
+            write!(w, "<div id=\"{}\">", id);
             w.push_buffer(impls_buf);
+            w.write_str("</div>");
         }
     }
 
@@ -1146,7 +1149,8 @@ fn render_assoc_items_inner(
             write!(
                 w,
                 "<h2 id=\"trait-implementations\" class=\"small-section-header\">\
-                     Trait Implementations<a href=\"#trait-implementations\" class=\"anchor\"></a>\
+                     Trait Implementations\
+                     <a href=\"#trait-implementations\" class=\"anchor\"></a>\
                  </h2>\
                  <div id=\"trait-implementations-list\">{}</div>",
                 impls

src/librustdoc/html/static/js/main.js

@@ -741,7 +741,7 @@ function hideThemeButtonState() {
         } else {
             addClass(innerToggle, "will-expand");
             onEachLazy(document.getElementsByClassName("rustdoc-toggle"), function(e) {
-                if (e.parentNode.id !== MAIN_ID ||
+                if (e.parentNode.id !== "implementations-list" ||
                     (!hasClass(e, "implementors-toggle") &&
                      !hasClass(e, "type-contents-toggle")))
                 {

src/test/rustdoc-gui/docblock-table-overflow.goml

@@ -12,10 +12,10 @@ assert-property: (".top-doc .docblock table", {"scrollWidth": "1573"})
 
 // Logically, the ".docblock" and the "<p>" should have the same scroll width.
 compare-elements-property: (
-    "#implementations + details .docblock",
-    "#implementations + details .docblock > p",
+    "#implementations-list > details .docblock",
+    "#implementations-list > details .docblock > p",
     ["scrollWidth"],
 )
-assert-property: ("#implementations + details .docblock", {"scrollWidth": "801"})
+assert-property: ("#implementations-list > details .docblock", {"scrollWidth": "801"})
 // However, since there is overflow in the <table>, its scroll width is bigger.
-assert-property: ("#implementations + details .docblock table", {"scrollWidth": "1573"})
+assert-property: ("#implementations-list > details .docblock table", {"scrollWidth": "1573"})

src/test/rustdoc-gui/hash-item-expansion.goml

@@ -3,9 +3,9 @@ goto: file://|DOC_PATH|/test_docs/struct.Foo.html#method.borrow
 // In the blanket implementations list, "Borrow" is the second one, hence the ":nth(2)".
 assert-attribute: ("#blanket-implementations-list > details:nth-child(2)", {"open": ""})
 // We first check that the impl block is open by default.
-assert-attribute: ("#implementations + details", {"open": ""})
+assert-attribute: ("#implementations-list details", {"open": ""})
 // To ensure that we will click on the currently hidden method.
 assert-text: (".sidebar-elems section .block li > a", "must_use")
 click: ".sidebar-elems section .block li > a"
 // We check that the impl block was opened as expected so that we can see the method.
-assert-attribute: ("#implementations + details", {"open": ""})
+assert-attribute: ("#implementations-list > details", {"open": ""})

src/test/rustdoc-gui/impl-default-expansion.goml

@@ -1,3 +1,3 @@
 // This test ensures that the impl blocks are open by default.
 goto: file://|DOC_PATH|/test_docs/struct.Foo.html
-assert-attribute: ("#main-content > details.implementors-toggle", {"open": ""})
+assert-attribute: ("#implementations-list details.implementors-toggle", {"open": ""})

src/test/rustdoc-gui/toggle-docs-mobile.goml

@@ -14,7 +14,7 @@ assert-attribute: (".top-doc", {"open": ""})
 // Assert the position of the toggle on the top doc block.
 assert-position: (".top-doc summary::before", {"x": 4})
 // Assert the position of the toggle on the impl block.
-assert-position: ("#implementations + details > summary::before", {"x": 4})
+assert-position: ("#implementations-list > details > summary::before", {"x": 4})
 // Assert the position of the toggle on a method.
 assert-position: (
     "#trait-implementations-list .impl-items .method-toggle > summary::before",

src/test/rustdoc-gui/toggle-docs.goml

@@ -24,7 +24,7 @@ wait-for: 50
 assert-text: ("#toggle-all-docs", "[+]")
 // We check that all <details> are collapsed (except for the impl block ones).
 assert-attribute-false: ("details.rustdoc-toggle:not(.implementors-toggle)", {"open": ""}, ALL)
-assert-attribute: ("details.rustdoc-toggle.implementors-toggle", {"open": ""})
+assert-attribute: ("#implementations-list > details.implementors-toggle", {"open": ""})
 // We now check that the other impl blocks are collapsed.
 assert-attribute-false: (
     "#blanket-implementations-list > details.rustdoc-toggle.implementors-toggle",

src/test/rustdoc/duplicate_impls/issue-33054.rs

@@ -1,8 +1,10 @@
+// ignore-tidy-linelength
+
 // @has issue_33054/impls/struct.Foo.html
 // @has - '//h3[@class="code-header in-band"]' 'impl Foo'
 // @has - '//h3[@class="code-header in-band"]' 'impl Bar for Foo'
 // @count - '//*[@id="trait-implementations-list"]//*[@class="impl has-srclink"]' 1
-// @count - '//*[@id="main-content"]/details/summary/*[@class="impl has-srclink"]' 1
+// @count - '//*[@id="main-content"]/div[@id="implementations-list"]/details/summary/*[@class="impl has-srclink"]' 1
 // @has issue_33054/impls/bar/trait.Bar.html
 // @has - '//h3[@class="code-header in-band"]' 'impl Bar for Foo'
 // @count - '//*[@class="struct"]' 1