Add configuration options to hide TOC or module navigation

src/librustdoc/html/markdown.rs

@@ -1661,7 +1661,10 @@ pub(crate) fn plain_text_summary(md: &str, link_names: &[RenderedLink]) -> Strin
     s
 }
 
-pub(crate) fn plain_text_from_events<'a>(events: impl Iterator<Item=pulldown_cmark::Event<'a>>, s: &mut String) {
+pub(crate) fn plain_text_from_events<'a>(
+    events: impl Iterator<Item = pulldown_cmark::Event<'a>>,
+    s: &mut String,
+) {
     for event in events {
         match &event {
             Event::Text(text) => s.push_str(text),

src/librustdoc/html/render/context.rs

@@ -631,6 +631,7 @@ impl<'tcx> FormatRenderer<'tcx> for Context<'tcx> {
             title: "",
             is_crate: false,
             is_mod: false,
+            parent_is_crate: false,
             blocks: vec![blocks],
             path: String::new(),
         };

src/librustdoc/html/render/sidebar.rs

@@ -19,6 +19,7 @@ pub(super) struct Sidebar<'a> {
     pub(super) title_prefix: &'static str,
     pub(super) title: &'a str,
     pub(super) is_crate: bool,
+    pub(super) parent_is_crate: bool,
     pub(super) is_mod: bool,
     pub(super) blocks: Vec<LinkBlock<'a>>,
     pub(super) path: String,
@@ -126,8 +127,15 @@ pub(super) fn print_sidebar(cx: &Context<'_>, it: &clean::Item, buffer: &mut Buf
     } else {
         "".into()
     };
-    let sidebar =
-        Sidebar { title_prefix, title, is_mod: it.is_mod(), is_crate: it.is_crate(), blocks, path };
+    let sidebar = Sidebar {
+        title_prefix,
+        title,
+        is_mod: it.is_mod(),
+        is_crate: it.is_crate(),
+        parent_is_crate: sidebar_path.len() == 1,
+        blocks,
+        path,
+    };
     sidebar.render_into(buffer).unwrap();
 }
 
@@ -156,26 +164,32 @@ fn docblock_toc<'a>(
         edition: cx.shared.edition(),
         playground: &cx.shared.playground,
         custom_code_classes_in_docs: cx.tcx().features().custom_code_classes_in_docs,
-    }.into_parts();
-    let links: Vec<Link<'_>> = toc.entries.into_iter().map(|entry| {
-        Link {
-            name: entry.name.into(),
-            href: entry.id.into(),
-            children: entry.children.entries.into_iter().map(|entry| Link {
+    }
+    .into_parts();
+    let links: Vec<Link<'_>> = toc
+        .entries
+        .into_iter()
+        .map(|entry| {
+            Link {
                 name: entry.name.into(),
                 href: entry.id.into(),
-                // Only a single level of nesting is shown here.
-                // Going the full six could break the layout,
-                // so we have to cut it off somewhere.
-                children: vec![],
-            }).collect()
-        }
-    }).collect();
-    if links.is_empty() {
-        None
-    } else {
-        Some(LinkBlock::new(Link::new("#", "Sections"), "top-toc", links))
-    }
+                children: entry
+                    .children
+                    .entries
+                    .into_iter()
+                    .map(|entry| Link {
+                        name: entry.name.into(),
+                        href: entry.id.into(),
+                        // Only a single level of nesting is shown here.
+                        // Going the full six could break the layout,
+                        // so we have to cut it off somewhere.
+                        children: vec![],
+                    })
+                    .collect(),
+            }
+        })
+        .collect();
+    if links.is_empty() { None } else { Some(LinkBlock::new(Link::new("", ""), "top-toc", links)) }
 }
 
 fn sidebar_struct<'a>(
@@ -505,10 +519,7 @@ pub(crate) fn sidebar_module_like(
     LinkBlock::new(Link::empty(), "", item_sections)
 }
 
-fn sidebar_module(
-    items: &[clean::Item],
-    ids: &mut IdMap,
-) -> LinkBlock<'static> {
+fn sidebar_module(items: &[clean::Item], ids: &mut IdMap) -> LinkBlock<'static> {
     let item_sections_in_use: FxHashSet<_> = items
         .iter()
         .filter(|it| {

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

@@ -567,6 +567,14 @@ ul.block, .block li, .block ul {
 	margin-right: 0.25rem;
 }
 
+.hide-toc #TOC, .hide-toc .in-crate {
+	display: none;
+}
+
+.hide-modnav #ModNav {
+	display: none;
+}
+
 .sidebar h2 {
 	overflow-wrap: anywhere;
 	padding: 0;

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

@@ -460,7 +460,7 @@ function preLoadCss(cssUrl) {
         if (!window.SIDEBAR_ITEMS) {
             return;
         }
-        const sidebar = document.getElementsByClassName("sidebar-elems")[0];
+        const sidebar = document.getElementById("ModNav");
 
         /**
          * Append to the sidebar a "block" of links - a heading along with a list (`<ul>`) of items.
@@ -845,7 +845,7 @@ function preLoadCss(cssUrl) {
         if (!window.ALL_CRATES) {
             return;
         }
-        const sidebarElems = document.getElementsByClassName("sidebar-elems")[0];
+        const sidebarElems = document.getElementById("ModNav");
         if (!sidebarElems) {
             return;
         }

src/librustdoc/html/static/js/settings.js

@@ -36,6 +36,20 @@
                     removeClass(document.documentElement, "hide-sidebar");
                 }
                 break;
+            case "hide-toc":
+                if (value === true) {
+                    addClass(document.documentElement, "hide-toc");
+                } else {
+                    removeClass(document.documentElement, "hide-toc");
+                }
+                break;
+            case "hide-modnav":
+                if (value === true) {
+                    addClass(document.documentElement, "hide-modnav");
+                } else {
+                    removeClass(document.documentElement, "hide-modnav");
+                }
+                break;
         }
     }
 
@@ -102,6 +116,11 @@
         let output = "";
 
         for (const setting of settings) {
+            if (setting === "hr") {
+                output += "<hr>";
+                continue;
+            }
+
             const js_data_name = setting["js_name"];
             const setting_name = setting["name"];
 
@@ -198,6 +217,16 @@
                 "js_name": "hide-sidebar",
                 "default": false,
             },
+            {
+                "name": "Hide table of contents",
+                "js_name": "hide-toc",
+                "default": false,
+            },
+            {
+                "name": "Hide module navigation",
+                "js_name": "hide-modnav",
+                "default": false,
+            },
             {
                 "name": "Disable keyboard shortcuts",
                 "js_name": "disable-shortcuts",

src/librustdoc/html/static/js/storage.js

@@ -196,16 +196,21 @@ updateTheme();
 // This needs to be done here because this JS is render-blocking,
 // so that the sidebar doesn't "jump" after appearing on screen.
 // The user interaction to change this is set up in main.js.
+//
+// At this point in page load, `document.body` is not available yet.
+// Set a class on the `<html>` element instead.
 if (getSettingValue("source-sidebar-show") === "true") {
-    // At this point in page load, `document.body` is not available yet.
-    // Set a class on the `<html>` element instead.
     addClass(document.documentElement, "src-sidebar-expanded");
 }
 if (getSettingValue("hide-sidebar") === "true") {
-    // At this point in page load, `document.body` is not available yet.
-    // Set a class on the `<html>` element instead.
     addClass(document.documentElement, "hide-sidebar");
 }
+if (getSettingValue("hide-toc") === "true") {
+    addClass(document.documentElement, "hide-toc");
+}
+if (getSettingValue("hide-modnav") === "true") {
+    addClass(document.documentElement, "hide-modnav");
+}
 function updateSidebarWidth() {
     const desktopSidebarWidth = getSettingValue("desktop-sidebar-width");
     if (desktopSidebarWidth && desktopSidebarWidth !== "null") {

src/librustdoc/html/templates/sidebar.html

@@ -1,8 +1,3 @@
-{% if !title.is_empty() %}
-    <h2 class="location"> {# #}
-        <a href="#">{{title_prefix}}{{title}}</a> {# #}
-    </h2>
-{% endif %}
 <div class="sidebar-elems">
     {% if is_crate %}
         <ul class="block">
@@ -11,11 +6,16 @@ <h2 class="location"> {# #}
     {% endif %}
 
     {% if self.should_render_blocks() %}
-        <section>
+        <section id="TOC">
+            {% if !title.is_empty() %}
+            <h2 class="location"> {# #}
+                <a href="#">{{title_prefix}}{{title}}</a> {# #}
+            </h2>
+            {% endif %}
             {% for block in blocks %}
                 {% if block.should_render() %}
                     {% if !block.heading.name.is_empty() %}
-                        <h3{% if !block.class.is_empty() +%} class="{{block.class}}"{% endif %}> {# #}
+                        <h3> {# #}
                             <a href="#{{block.heading.href|safe}}">{{block.heading.name}}</a> {# #}
                         </h3> {# #}
                     {% endif %}
@@ -39,7 +39,11 @@ <h2 class="location"> {# #}
             {% endfor %}
         </section>
     {% endif %}
+    <div id="ModNav">
     {% if !path.is_empty() %}
-        <h2><a href="{% if is_mod %}../{% endif %}index.html">In {{+ path}}</a></h2>
+        <h2{% if parent_is_crate +%} class="in-crate"{% endif %}> {# #}
+            <a href="{% if is_mod %}../{% endif %}index.html">In {{+ path}}</a> {# #}
+        </h2> {# #}
     {% endif %}
+    </div> {# #}
 </div>

tests/rustdoc-gui/sidebar.goml

@@ -128,8 +128,8 @@ assert-count: (".sidebar .location", 1)
 //   - Module name, followed by TOC for module headings
 //   - "In crate [name]" parent pointer, followed by sibling navigation
 assert-count: (".sidebar h2", 3)
-assert-text: (".sidebar > .sidebar-elems > h2", "In crate lib2")
-assert-property: (".sidebar > .sidebar-elems > h2 > a", {
+assert-text: (".sidebar > .sidebar-elems > #ModNav > h2", "In crate lib2")
+assert-property: (".sidebar > .sidebar-elems > #ModNav > h2 > a", {
     "href": "/lib2/index.html",
 }, ENDS_WITH)
 // We check that we don't have the crate list.
@@ -139,8 +139,8 @@ go-to: "./sub_module/sub_sub_module/index.html"
 assert-property: (".sidebar", {"clientWidth": "200"})
 assert-text: (".sidebar > .sidebar-crate > h2 > a", "lib2")
 assert-text: (".sidebar .location", "Module sub_sub_module")
-assert-text: (".sidebar > .sidebar-elems > h2", "In lib2::module::sub_module")
-assert-property: (".sidebar > .sidebar-elems > h2 > a", {
+assert-text: (".sidebar > .sidebar-elems > #ModNav > h2", "In lib2::module::sub_module")
+assert-property: (".sidebar > .sidebar-elems > #ModNav > h2 > a", {
     "href": "/module/sub_module/index.html",
 }, ENDS_WITH)
 // We check that we don't have the crate list.
@@ -184,3 +184,36 @@ assert-property: (".sidebar .sidebar-crate h2 a", {
     "offsetTop": |index_sidebar_y|,
     "offsetLeft": |index_sidebar_x|,
 })
+
+// Configuration option to show TOC in sidebar.
+set-local-storage: {"rustdoc-hide-toc": "true"}
+go-to: "file://" + |DOC_PATH| + "/test_docs/enum.WhoLetTheDogOut.html"
+assert-css: ("#TOC", {"display": "none"})
+assert-css: (".sidebar .in-crate", {"display": "none"})
+set-local-storage: {"rustdoc-hide-toc": "false"}
+go-to: "file://" + |DOC_PATH| + "/test_docs/enum.WhoLetTheDogOut.html"
+assert-css: ("#TOC", {"display": "block"})
+assert-css: (".sidebar .in-crate", {"display": "block"})
+
+set-local-storage: {"rustdoc-hide-modnav": "true"}
+go-to: "file://" + |DOC_PATH| + "/test_docs/enum.WhoLetTheDogOut.html"
+assert-css: ("#ModNav", {"display": "none"})
+set-local-storage: {"rustdoc-hide-modnav": "false"}
+go-to: "file://" + |DOC_PATH| + "/test_docs/enum.WhoLetTheDogOut.html"
+assert-css: ("#ModNav", {"display": "block"})
+
+set-local-storage: {"rustdoc-hide-toc": "true"}
+go-to: "file://" + |DOC_PATH| + "/test_docs/index.html"
+assert-css: ("#TOC", {"display": "none"})
+assert-false: ".sidebar .in-crate"
+set-local-storage: {"rustdoc-hide-toc": "false"}
+go-to: "file://" + |DOC_PATH| + "/test_docs/index.html"
+assert-css: ("#TOC", {"display": "block"})
+assert-false: ".sidebar .in-crate"
+
+set-local-storage: {"rustdoc-hide-modnav": "true"}
+go-to: "file://" + |DOC_PATH| + "/test_docs/index.html"
+assert-css: ("#ModNav", {"display": "none"})
+set-local-storage: {"rustdoc-hide-modnav": "false"}
+go-to: "file://" + |DOC_PATH| + "/test_docs/index.html"
+assert-css: ("#ModNav", {"display": "block"})

tests/rustdoc/sidebar/top-toc-html.rs

@@ -1,3 +1,5 @@
+// ignore-tidy-linelength
+
 #![crate_name = "foo"]
 #![feature(lazy_type_alias)]
 #![allow(incomplete_features)]

tests/rustdoc/sidebar/top-toc-idmap.rs

@@ -3,7 +3,7 @@
 #![allow(incomplete_features)]
 
 //! # Structs
-//! 
+//!
 //! This header has the same name as a built-in header,
 //! and we need to make sure they're disambiguated with
 //! suffixes.