Use C functions for the backstack, instead of a lua module

Working with the default group and root kinda sucks if you have to do it
from lua!

2 files changed, 11 insertions, 1 deletions

diff --git a/src/ui/include/screen_lua.hpp b/src/ui/include/screen_lua.hpp
index df83ea8b..ee9f6813 100644
--- a/src/ui/include/screen_lua.hpp
+++ b/src/ui/include/screen_lua.hpp
@@ -15,7 +15,14 @@ namespace screens {
 
 class Lua : public Screen {
  public:
-  explicit Lua(lua_State* l);
+  Lua();
+  ~Lua();
+
+  auto SetObjRef(lua_State*) -> void;
+
+ private:
+  lua_State* s_;
+  std::optional<int> obj_ref_;
 };
 
 }  // namespace screens
diff --git a/src/ui/include/ui_fsm.hpp b/src/ui/include/ui_fsm.hpp
index 39fae4b0..d3ea7eac 100644
--- a/src/ui/include/ui_fsm.hpp
+++ b/src/ui/include/ui_fsm.hpp
@@ -135,6 +135,9 @@ class Lua : public UiState {
   using UiState::react;
 
  private:
+  auto PushLuaScreen(lua_State*) -> int;
+  auto PopLuaScreen(lua_State*) -> int;
+
   std::shared_ptr<lua::Property> battery_pct_;
   std::shared_ptr<lua::Property> battery_mv_;
   std::shared_ptr<lua::Property> battery_charging_;