Rollup merge of rust-lang#85169 - jsha:hoist-classes, r=GuillaumeGomez

Add method-toggle to <details> for methods

The makes the code for handling "auto-hide" settings more consistent.

Demo at https://hoffman-andrews.com/rust/hoist-classes/std/string/struct.String.html

Fixes rust-lang#84829

Author: RalfJung

src/librustdoc/html/render/mod.rs

@@ -1352,8 +1352,11 @@ fn render_impl(
         }
         let w = if short_documented && trait_.is_some() { interesting } else { boring };
 
-        if !doc_buffer.is_empty() {
-            w.write_str("<details class=\"rustdoc-toggle\" open><summary>");
+        let toggled = !doc_buffer.is_empty();
+        if toggled {
+            let method_toggle_class =
+                if item_type == ItemType::Method { " method-toggle" } else { "" };
+            write!(w, "<details class=\"rustdoc-toggle{}\" open><summary>", method_toggle_class);
         }
         match *item.kind {
             clean::MethodItem(..) | clean::TyMethodItem(_) => {
@@ -1453,7 +1456,7 @@ fn render_impl(
         }
 
         w.push_buffer(info_buffer);
-        if !doc_buffer.is_empty() {
+        if toggled {
             w.write_str("</summary>");
             w.push_buffer(doc_buffer);
             w.push_str("</details>");

src/librustdoc/html/static/main.js

@@ -924,24 +924,16 @@ function hideThemeButtonState() {
             });
         }
 
-        if (hideMethodDocs) {
-            onEachLazy(document.getElementsByClassName("method"), function(e) {
-                var toggle = e.parentNode;
-                if (toggle) {
-                    toggle = toggle.parentNode;
-                }
-                if (toggle && toggle.tagName === "DETAILS") {
-                    toggle.open = false;
-                }
-            });
-        }
-
         onEachLazy(document.getElementsByTagName("details"), function (e) {
             var showLargeItem = !hideLargeItemContents && hasClass(e, "type-contents-toggle");
             var showImplementor = !hideImplementors && hasClass(e, "implementors-toggle");
             if (showLargeItem || showImplementor) {
                 e.open = true;
             }
+            if (hideMethodDocs && hasClass(e, "method-toggle")) {
+                e.open = false;
+            }
+
         });
 
         var currentType = document.getElementsByClassName("type-decl")[0];