Rollup merge of rust-lang#58028 - GuillaumeGomez:fix-settings-image-link, r=QuietMisdreavus

Fix image link in the settings menu

Fixes rust-lang#57892.

r? @QuietMisdreavus

Author: GuillaumeGomez

src/librustdoc/html/layout.rs

@@ -4,6 +4,8 @@ use std::path::PathBuf;
 
 use externalfiles::ExternalHtml;
 
+use html::render::SlashChecker;
+
 #[derive(Clone)]
 pub struct Layout {
     pub logo: String,
@@ -176,16 +178,22 @@ pub fn render<T: fmt::Display, S: fmt::Display>(
     static_root_path = static_root_path,
     root_path = page.root_path,
     css_class = page.css_class,
-    logo      = if layout.logo.is_empty() {
-        format!("<a href='{}{}/index.html'>\
-                 <img src='{static_root_path}rust-logo{suffix}.png' alt='logo' width='100'></a>",
-                static_root_path=static_root_path,
-                suffix=page.resource_suffix)
-    } else {
-        format!("<a href='{}{}/index.html'>\
-                 <img src='{}' alt='logo' width='100'></a>",
-                page.root_path, layout.krate,
-                layout.logo)
+    logo      = {
+        let p = format!("{}{}", page.root_path, layout.krate);
+        let p = SlashChecker(&p);
+        if layout.logo.is_empty() {
+            format!("<a href='{path}index.html'>\
+                     <img src='{static_root_path}rust-logo{suffix}.png' \
+                          alt='logo' width='100'></a>",
+                    path=p,
+                    static_root_path=static_root_path,
+                    suffix=page.resource_suffix)
+        } else {
+            format!("<a href='{}index.html'>\
+                     <img src='{}' alt='logo' width='100'></a>",
+                    p,
+                    layout.logo)
+        }
     },
     title     = page.title,
     description = page.description,

src/librustdoc/html/render.rs

@@ -73,6 +73,18 @@ use minifier;
 /// A pair of name and its optional document.
 pub type NameDoc = (String, Option<String>);
 
+pub struct SlashChecker<'a>(pub &'a str);
+
+impl<'a> Display for SlashChecker<'a> {
+    fn fmt(&self, f: &mut Formatter) -> fmt::Result {
+        if !self.0.ends_with("/") && !self.0.is_empty() {
+            write!(f, "{}/", self.0)
+        } else {
+            write!(f, "{}", self.0)
+        }
+    }
+}
+
 /// Major driving force in all rustdoc rendering. This contains information
 /// about where in the tree-like hierarchy rendering is occurring and controls
 /// how the current page is being rendered.
@@ -1140,7 +1152,8 @@ themePicker.onblur = handleThemeButtonsBlur;
                                   krates
                                     .iter()
                                     .map(|s| {
-                                        format!("<li><a href=\"{}/index.html\">{}</li>", s, s)
+                                        format!("<li><a href=\"{}index.html\">{}</li>",
+                                                SlashChecker(s), s)
                                     })
                                     .collect::<String>());
             try_err!(layout::render(&mut w, &cx.shared.layout,
@@ -2075,8 +2088,7 @@ impl Context {
         let mut themes = self.shared.themes.clone();
         let sidebar = "<p class='location'>Settings</p><div class='sidebar-elems'></div>";
         themes.push(PathBuf::from("settings.css"));
-        let mut layout = self.shared.layout.clone();
-        layout.krate = String::new();
+        let layout = self.shared.layout.clone();
         try_err!(layout::render(&mut w, &layout,
                                 &page, &sidebar, &settings,
                                 self.shared.css_file_extension.is_some(),
@@ -2455,7 +2467,7 @@ impl<'a> fmt::Display for Item<'a> {
 
 fn item_path(ty: ItemType, name: &str) -> String {
     match ty {
-        ItemType::Module => format!("{}/index.html", name),
+        ItemType::Module => format!("{}index.html", SlashChecker(name)),
         _ => format!("{}.{}.html", ty.css_class(), name),
     }
 }

src/test/rustdoc/keyword.rs

@@ -7,7 +7,7 @@
 // @has foo/keyword.match.html '//a[@class="keyword"]' 'match'
 // @has foo/keyword.match.html '//span[@class="in-band"]' 'Keyword match'
 // @has foo/keyword.match.html '//section[@id="main"]//div[@class="docblock"]//p' 'this is a test!'
-// @!has foo/index.html '//a/@href' 'foo/index.html'
+// @has foo/index.html '//a/@href' '../foo/index.html'
 // @!has foo/foo/index.html
 // @!has-dir foo/foo
 #[doc(keyword = "match")]