Add configuration options to hide TOC or module navigation

src/librustdoc/html/render/context.rs

@@ -633,6 +633,7 @@ 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();
 }
 
@@ -155,7 +163,6 @@ fn docblock_toc<'a>(
         error_codes: cx.shared.codes,
         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
@@ -184,7 +191,7 @@ fn docblock_toc<'a>(
     if links.is_empty() {
         None
     } else {
-        Some(LinkBlock::new(Link::new("#", "Sections"), "top-toc", links))
+        Some(LinkBlock::new(Link::new("", "Sections"), "top-toc", links))
     }
 }
 

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

@@ -556,8 +556,8 @@ ul.block, .block li, .block ul {
 	list-style: none;
 }
 
-.block ul {
-	margin-left: 12px;
+.block ul a {
+	padding-left: 1rem;
 }
 
 .sidebar-elems a,
@@ -571,6 +571,14 @@ ul.block, .block li, .block ul {
 	background-clip: border-box;
 }
 
+.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

@@ -493,7 +493,7 @@ 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.
@@ -878,7 +878,7 @@ 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

@@ -123,8 +123,8 @@ 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.
@@ -134,8 +134,8 @@ 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.
@@ -194,3 +194,36 @@ assert-position-false: (".sidebar-crate > h2 > a", {"x": -3})
 // when line-wrapped, see that it becomes flush-left again
 drag-and-drop: ((205, 100), (108, 100))
 assert-position: (".sidebar-crate > h2 > a", {"x": -3})
+
+// 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"})