[search] fix multiple term matching edge case (#11960)

CHANGES.rst

@@ -33,6 +33,8 @@ Features added
 Bugs fixed
 ----------
 
+* #11959: Fix multiple term matching when word appears in both title and document.
+  Patch by Will Lachance.
 * #11958: HTML Search: Fix partial matches overwriting full matches.
   Patch by William Lachance.
 * #11944: Use anchor in search preview.

sphinx/themes/basic/static/searchtools.js

@@ -511,9 +511,8 @@ const Search = {
 
       // create the mapping
       files.forEach((file) => {
-        if (fileMap.has(file) && fileMap.get(file).indexOf(word) === -1)
+        if (!fileMap.has(file)) fileMap.set(file, [word]);
-          fileMap.get(file).push(word);
+        else if (fileMap.get(file).indexOf(word) === -1) fileMap.get(file).push(word);
-        else fileMap.set(file, [word]);
       });
     });
 

tests/js/searchtools.js

@@ -27,6 +27,33 @@ describe('Basic html theme search', function() {
       expect(Search.performTermsSearch(searchterms, excluded, terms, titleterms)).toEqual(hits);
     });
 
+    it('should be able to search for multiple terms', function() {
+      index = {
+        alltitles: {
+          'Main Page': [[0, 'main-page']],
+        },
+        docnames:["index"],
+        filenames:["index.rst"],
+        terms:{main:0, page:0},
+        titles:["Main Page"],
+        titleterms:{ main:0, page:0 }
+      }
+      Search.setIndex(index);
+
+      searchterms = ['main', 'page'];
+      excluded = [];
+      terms = index.terms;
+      titleterms = index.titleterms;
+      hits = [[
+        'index',
+        'Main Page',
+        '',
+        null,
+        15,
+        'index.rst']];
+      expect(Search.performTermsSearch(searchterms, excluded, terms, titleterms)).toEqual(hits);
+    });
+
   });
 
 });