Fix search for custom heading attributes

Author: ehuss

src/renderer/html_handlebars/search.rs

@@ -138,9 +138,11 @@ fn render_item(
 
                 in_heading = true;
             }
-            Event::End(Tag::Heading(i, ..)) if i as u32 <= max_section_depth => {
+            Event::End(Tag::Heading(i, id, _classes)) if i as u32 <= max_section_depth => {
                 in_heading = false;
-                section_id = Some(utils::unique_id_from_content(&heading, &mut id_counter));
+                section_id = id
+                    .map(|id| id.to_string())
+                    .or_else(|| Some(utils::unique_id_from_content(&heading, &mut id_counter)));
                 breadcrumbs.push(heading.clone());
             }
             Event::Start(Tag::FootnoteDefinition(name)) => {

tests/rendered_output.rs

@@ -755,6 +755,7 @@ mod search {
         let no_headers = get_doc_ref("first/no-headers.html");
         let duplicate_headers_1 = get_doc_ref("first/duplicate-headers.html#header-text-1");
         let conclusion = get_doc_ref("conclusion.html#conclusion");
+        let heading_attrs = get_doc_ref("first/heading-attributes.html#both");
 
         let bodyidx = &index["index"]["index"]["body"]["root"];
         let textidx = &bodyidx["t"]["e"]["x"]["t"];
@@ -786,6 +787,10 @@ mod search {
             docs[&no_headers]["body"],
             "Capybara capybara capybara. Capybara capybara capybara. ThisLongWordIsIncludedSoWeCanCheckThatSufficientlyLongWordsAreOmittedFromTheSearchIndex."
         );
+        assert_eq!(
+            docs[&heading_attrs]["breadcrumbs"],
+            "First Chapter » Heading Attributes » Heading with id and classes"
+        );
     }
 
     // Setting this to `true` may cause issues with `cargo watch`,

tests/searchindex_fixture.json

@@ -23,9 +23,9 @@
     "first/duplicate-headers.html#header-text",
     "first/duplicate-headers.html#header-text-1",
     "first/duplicate-headers.html#header-text-2",
-    "first/heading-attributes.html#heading-attributes",
+    "first/heading-attributes.html#attrs",
     "first/heading-attributes.html#heading-with-classes",
-    "first/heading-attributes.html#heading-with-id-and-classes",
+    "first/heading-attributes.html#both",
     "second.html#second-chapter",
     "second/nested.html#testing-relative-links-for-the-print-page",
     "second/nested.html#some-section",