rustdoc: reduce per-page HTML overhead

src/librustdoc/html/render/context.rs

@@ -231,7 +231,7 @@ impl<'tcx> Context<'tcx> {
                 rust_logo: has_doc_flag(self.tcx(), LOCAL_CRATE.as_def_id(), sym::rust_logo),
             };
             let mut page_buffer = Buffer::html();
-            print_item(self, it, &mut page_buffer, &page);
+            print_item(self, it, &mut page_buffer);
             layout::render(
                 &clone_shared.layout,
                 &page,

src/librustdoc/html/render/print_item.rs

@@ -31,11 +31,10 @@ use crate::html::format::{
     display_fn, join_with_double_colon, print_abi_with_space, print_constness_with_space,
     print_where_clause, visibility_print_with_space, Buffer, Ending, PrintWithSpace,
 };
-use crate::html::layout::Page;
+use crate::html::highlight;
 use crate::html::markdown::{HeadingOffset, MarkdownSummaryLine};
 use crate::html::render::{document_full, document_item_info};
 use crate::html::url_parts_builder::UrlPartsBuilder;
-use crate::html::{highlight, static_files};
 
 use askama::Template;
 use itertools::Itertools;
@@ -157,8 +156,6 @@ struct PathComponent {
 #[derive(Template)]
 #[template(path = "print_item.html")]
 struct ItemVars<'a> {
-    static_root_path: &'a str,
-    clipboard_svg: &'static static_files::StaticFile,
     typ: &'a str,
     name: &'a str,
     item_type: &'a str,
@@ -178,12 +175,7 @@ fn print_where_clause_and_check<'a, 'tcx: 'a>(
     len_before != buffer.len()
 }
 
-pub(super) fn print_item(
-    cx: &mut Context<'_>,
-    item: &clean::Item,
-    buf: &mut Buffer,
-    page: &Page<'_>,
-) {
+pub(super) fn print_item(cx: &mut Context<'_>, item: &clean::Item, buf: &mut Buffer) {
     debug_assert!(!item.is_stripped());
     let typ = match *item.kind {
         clean::ModuleItem(_) => {
@@ -252,8 +244,6 @@ pub(super) fn print_item(
     };
 
     let item_vars = ItemVars {
-        static_root_path: &page.get_static_root_path(),
-        clipboard_svg: &static_files::STATIC_FILES.clipboard_svg,
         typ,
         name: item.name.as_ref().unwrap().as_str(),
         item_type: &item.type_().to_string(),
@@ -1237,22 +1227,18 @@ fn item_opaque_ty(
 }
 
 fn item_type_alias(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, t: &clean::TypeAlias) {
-    fn write_content(w: &mut Buffer, cx: &Context<'_>, it: &clean::Item, t: &clean::TypeAlias) {
-        wrap_item(w, |w| {
-            write!(
-                w,
-                "{attrs}{vis}type {name}{generics}{where_clause} = {type_};",
-                attrs = render_attributes_in_pre(it, "", cx),
-                vis = visibility_print_with_space(it, cx),
-                name = it.name.unwrap(),
-                generics = t.generics.print(cx),
-                where_clause = print_where_clause(&t.generics, cx, 0, Ending::Newline),
-                type_ = t.type_.print(cx),
-            );
-        });
-    }
-
-    write_content(w, cx, it, t);
+    wrap_item(w, |w| {
+        write!(
+            w,
+            "{attrs}{vis}type {name}{generics}{where_clause} = {type_};",
+            attrs = render_attributes_in_pre(it, "", cx),
+            vis = visibility_print_with_space(it, cx),
+            name = it.name.unwrap(),
+            generics = t.generics.print(cx),
+            where_clause = print_where_clause(&t.generics, cx, 0, Ending::Newline),
+            type_ = t.type_.print(cx),
+        );
+    });
 
     write!(w, "{}", document(cx, it, None, HeadingOffset::H2));
 

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

@@ -1603,6 +1603,16 @@ a.tooltip:hover::after {
 	border-color: var(--settings-button-border-focus);
 }
 
+#settings-menu > a {
+	line-height: 0;
+	font-size: 0;
+}
+#settings-menu > a:before {
+	content: url('wheel-63255fc4502dca9a.svg');
+	width: 22px;
+	height: 22px;
+}
+
 #sidebar-button > a:before {
 	content: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 22 22" \
 		fill="none" stroke="black">\
@@ -1622,11 +1632,17 @@ a.tooltip:hover::after {
 	padding-left: 2px;
 	border: 0;
 	width: 33px;
+	line-height: 0;
+	font-size: 0;
 }
-#copy-path > img {
+
+#copy-path:before {
 	filter: var(--copy-path-img-filter);
+	content: url('clipboard-24048e6d87f63d07.svg');
+	width: 19px;
+	height: 18px;
 }
-#copy-path:hover > img {
+#copy-path:hover:before {
 	filter: var(--copy-path-img-hover-filter);
 }
 

src/librustdoc/html/static_files.rs

@@ -106,7 +106,6 @@ static_files! {
     license_mit => "static/LICENSE-MIT.txt",
     rust_logo_svg => "static/images/rust-logo.svg",
     rust_favicon_svg => "static/images/favicon.svg",
-    rust_favicon_png_16 => "static/images/favicon-16x16.png",
     rust_favicon_png_32 => "static/images/favicon-32x32.png",
     fira_sans_regular => "static/fonts/FiraSans-Regular.woff2",
     fira_sans_medium => "static/fonts/FiraSans-Medium.woff2",

src/librustdoc/html/templates/page.html

@@ -6,13 +6,10 @@
     <meta name="generator" content="rustdoc"> {# #}
     <meta name="description" content="{{page.description}}"> {# #}
     <title>{{page.title}}</title> {# #}
-    <script> if (window.location.protocol !== "file:") document.write(` {# Hack to skip preloading fonts locally - see #98769 #}
-    <link rel="preload" as="font" type="font/woff2" crossorigin href="{{static_root_path|safe}}{{files.source_serif_4_regular}}"> {# #}
-    <link rel="preload" as="font" type="font/woff2" crossorigin href="{{static_root_path|safe}}{{files.fira_sans_regular}}"> {# #}
-    <link rel="preload" as="font" type="font/woff2" crossorigin href="{{static_root_path|safe}}{{files.fira_sans_medium}}"> {# #}
-    <link rel="preload" as="font" type="font/woff2" crossorigin href="{{static_root_path|safe}}{{files.source_code_pro_regular}}"> {# #}
-    <link rel="preload" as="font" type="font/woff2" crossorigin href="{{static_root_path|safe}}{{files.source_code_pro_semibold}}"> {# #}
-    `)</script> {# #}
+    <script>if(window.location.protocol!=="file:") {# Hack to skip preloading fonts locally - see #98769 #}
+    for(f of "{{files.source_serif_4_regular}},{{files.fira_sans_regular}},{{files.fira_sans_medium}},{{files.source_code_pro_regular}},{{files.source_code_pro_semibold}}".split(",")) {# #}
+     document.write(`<link rel="preload" as="font" type="font/woff2" crossorigin href="{{static_root_path|safe}}${f}">`) {# #}
+    </script> {# #}
     <link rel="stylesheet" {#+ #}
           href="{{static_root_path|safe}}{{files.normalize_css}}"> {# #}
     <link rel="stylesheet" {#+ #}
@@ -61,8 +58,6 @@
     {% if !layout.favicon.is_empty() %}
         <link rel="icon" href="{{layout.favicon}}"> {# #}
     {% else %}
-        <link rel="alternate icon" type="image/png" {#+ #}
-            href="{{static_root_path|safe}}{{files.rust_favicon_png_16}}"> {# #}
         <link rel="alternate icon" type="image/png" {#+ #}
             href="{{static_root_path|safe}}{{files.rust_favicon_png_32}}"> {# #}
         <link rel="icon" type="image/svg+xml" {#+ #}
@@ -114,13 +109,13 @@ <h2> {# #}
         <div class="version">{{+ display_krate_version_extra}}</div> {# #}
         {% endif %}
         {% else %}
-        <div class="src-sidebar-title">
+        <div class="src-sidebar-title"> {# #}
             <h2>Files</h2> {# #}
         </div> {# #}
         {% endif %}
         {{ sidebar|safe }}
     </nav> {# #}
-    <div class="sidebar-resizer"></div>
+    <div class="sidebar-resizer"></div> {# #}
     <main> {# #}
         {% if page.css_class != "src" %}<div class="width-limiter">{% endif %}
             <nav class="sub"> {# #}
@@ -142,8 +137,7 @@ <h2>Files</h2> {# #}
                     </div> {# #}
                     <div id="settings-menu" tabindex="-1"> {# #}
                         <a href="{{page.root_path|safe}}settings.html" title="settings"> {# #}
-                            <img width="22" height="22" alt="Change settings" {#+ #}
-                            src="{{static_root_path|safe}}{{files.wheel_svg}}"> {# #}
+                            Settings {# #}
                         </a> {# #}
                     </div> {# #}
                 </form> {# #}

src/librustdoc/html/templates/print_item.html

@@ -7,9 +7,7 @@ <h1>
         {% endfor %}
         <a class="{{item_type}}" href="#">{{name}}</a> {# #}
         <button id="copy-path" title="Copy item path to clipboard"> {# #}
-        <img src="{{static_root_path|safe}}{{clipboard_svg}}" {#+ #}
-                width="19" height="18" {#+ #}
-                alt="Copy item path"> {# #}
+            Copy item path {# #}
         </button> {# #}
     </h1> {# #}
     <span class="out-of-band">

src/librustdoc/html/templates/sidebar.html

@@ -5,7 +5,7 @@ <h2 class="location"> {# #}
 {% endif %}
 <div class="sidebar-elems">
     {% if is_crate %}
-        <ul class="block">
+        <ul class="block"> {# #}
             <li><a id="all-types" href="all.html">All Items</a></li> {# #}
         </ul>
     {% endif %}

tests/rustdoc-gui/search-result-go-to-first.goml

@@ -3,17 +3,17 @@
 // First, we check that the first page doesn't have the string we're looking for to ensure
 // that the feature is changing page as expected.
 go-to: "file://" + |DOC_PATH| + "/test_docs/index.html"
-assert-text-false: (".main-heading h1", "Struct test_docs::Foo")
+assert-text-false: (".main-heading h1", "Struct test_docs::FooCopy item path")
 
 // We now check that we land on the search result page if "go_to_first" isn't set.
 go-to: "file://" + |DOC_PATH| + "/test_docs/index.html?search=struct%3AFoo"
 // Waiting for the search results to appear...
 wait-for: "#search-tabs"
-assert-text-false: (".main-heading h1", "Struct test_docs::Foo")
+assert-text-false: (".main-heading h1", "Struct test_docs::FooCopy item path")
 // Ensure that the search results are displayed, not the "normal" content.
 assert-css: ("#main-content", {"display": "none"})
 
 // Now we can check that the feature is working as expected!
 go-to: "file://" + |DOC_PATH| + "/test_docs/index.html?search=struct%3AFoo&go_to_first=true"
 // Waiting for the page to load...
-wait-for-text: (".main-heading h1", "Struct test_docs::Foo")
+wait-for-text: (".main-heading h1", "Struct test_docs::FooCopy item path")

tests/rustdoc-gui/toggle-click-deadspace.goml

@@ -12,4 +12,4 @@ assert-attribute-false: (".impl-items .toggle", {"open": ""})
 
 // Click the "Trait" part of "impl Trait" and verify it navigates.
 click: "#impl-Trait-for-Foo h3 a:first-of-type"
-assert-text: (".main-heading h1", "Trait lib2::Trait")
+assert-text: (".main-heading h1", "Trait lib2::TraitCopy item path")