Taskbar: Allow creating menus for sub-categories

This change allows creating sub-categories in app files, e.g. with
Category=Games/Puzzles.

1 files changed, 28 insertions, 5 deletions

diff --git a/Userland/Services/Taskbar/main.cpp b/Userland/Services/Taskbar/main.cpp
index 5ddb9307e3..9e98cf3170 100644
--- a/Userland/Services/Taskbar/main.cpp
+++ b/Userland/Services/Taskbar/main.cpp
@@ -120,19 +120,42 @@ NonnullRefPtr<GUI::Menu> build_system_menu()
     system_menu->add_separator();
 
     // First we construct all the necessary app category submenus.
-    HashMap<String, NonnullRefPtr<GUI::Menu>> app_category_menus;
     auto category_icons = Core::ConfigFile::open("/res/icons/SystemMenu.ini");
-    for (const auto& category : sorted_app_categories) {
+    HashMap<String, NonnullRefPtr<GUI::Menu>> app_category_menus;
+
+    Function<void(String const&)> create_category_menu;
+    create_category_menu = [&](String const& category) {
         if (app_category_menus.contains(category))
-            continue;
-        auto& category_menu = system_menu->add_submenu(category);
+            return;
+        String parent_category, child_category = category;
+        for (ssize_t i = category.length() - 1; i >= 0; i--) {
+            if (category[i] == '/') {
+                parent_category = category.substring(0, i);
+                child_category = category.substring(i + 1);
+            }
+        }
+        GUI::Menu* parent_menu;
+        if (parent_category.is_empty()) {
+            parent_menu = system_menu;
+        } else {
+            parent_menu = app_category_menus.get(parent_category).value();
+            if (!parent_menu) {
+                create_category_menu(parent_category);
+                parent_menu = app_category_menus.get(parent_category).value();
+                VERIFY(parent_menu);
+            }
+        }
+        auto& category_menu = parent_menu->add_submenu(child_category);
         auto category_icon_path = category_icons->read_entry("16x16", category);
         if (!category_icon_path.is_empty()) {
             auto icon = Gfx::Bitmap::load_from_file(category_icon_path);
             category_menu.set_icon(icon);
         }
         app_category_menus.set(category, category_menu);
-    }
+    };
+
+    for (const auto& category : sorted_app_categories)
+        create_category_menu(category);
 
     // Then we create and insert all the app menu items into the right place.
     int app_identifier = 0;