Support submenus within theme menus.

[nageru] / nageru / theme.h

diff --git a/nageru/theme.h b/nageru/theme.h
index 1bed9929681fd11a3649b83d14b4de2d78125836..2fac7963346a2f3034041bd9ed089c8e24650d59 100644 (file)
--- a/nageru/theme.h
+++ b/nageru/theme.h
@@ -149,10 +149,27 @@ public:
 #endif
 
        struct MenuEntry {
+               MenuEntry(const std::string &text, lua_State *L, int lua_ref)
+                       : text(text), is_submenu(false), entry{L, lua_ref} {}
+               MenuEntry(const std::string &text, std::vector<std::unique_ptr<MenuEntry>> submenu)
+                       : text(text), is_submenu(true), submenu(std::move(submenu)) {}
+               ~MenuEntry();
+
                std::string text;
-               int lua_ref;
+               bool is_submenu;
+
+               union {
+                       // is_submenu = false.
+                       struct {
+                               lua_State *L;
+                               int lua_ref;
+                       } entry;
+
+                       // is_submenu = true.
+                       std::vector<std::unique_ptr<MenuEntry>> submenu;
+               };
        };
-       std::vector<MenuEntry> get_theme_menu() { return theme_menu; }  // Can be empty for no menu.
+       MenuEntry *get_theme_menu() { return theme_menu.get(); }  // Can be empty for no menu.
        void theme_menu_entry_clicked(int lua_ref);
 
        // Will be invoked every time the theme sets a new menu.
@@ -197,7 +214,7 @@ private:
                html_signal_connections;
 #endif
 
-       std::vector<MenuEntry> theme_menu;
+       std::unique_ptr<MenuEntry> theme_menu;
        std::function<void()> theme_menu_callback;
 
        friend class LiveInputWrapper;