1 files changed, 59 insertions, 1 deletions

diff --git a/src/ui/screen_lua.cpp b/src/ui/screen_lua.cpp
index 5130b4f7..d43c7ee7 100644
--- a/src/ui/screen_lua.cpp
+++ b/src/ui/screen_lua.cpp
@@ -7,14 +7,19 @@
 #include "screen_lua.hpp"
 
 #include "core/lv_obj_tree.h"
+#include "lua.h"
 #include "lua.hpp"
+#include "themes.hpp"
 
+#include "lua_thread.hpp"
 #include "luavgl.h"
 
 namespace ui {
 namespace screens {
 
-Lua::Lua() : s_(nullptr), obj_ref_() {}
+Lua::Lua() : s_(nullptr), obj_ref_() {
+  themes::Theme::instance()->ApplyStyle(root_, "root");
+}
 
 Lua::~Lua() {
   if (s_ && obj_ref_) {
@@ -22,6 +27,59 @@ Lua::~Lua() {
   }
 }
 
+auto Lua::onShown() -> void {
+  if (!s_ || !obj_ref_) {
+    return;
+  }
+  lua_rawgeti(s_, LUA_REGISTRYINDEX, *obj_ref_);
+  lua_pushliteral(s_, "onShown");
+
+  if (lua_gettable(s_, -2) == LUA_TFUNCTION) {
+    lua_pushvalue(s_, -2);
+    lua::CallProtected(s_, 1, 0);
+  } else {
+    lua_pop(s_, 1);
+  }
+
+  lua_pop(s_, 1);
+}
+
+auto Lua::onHidden() -> void {
+  if (!s_ || !obj_ref_) {
+    return;
+  }
+  lua_rawgeti(s_, LUA_REGISTRYINDEX, *obj_ref_);
+  lua_pushliteral(s_, "onHidden");
+
+  if (lua_gettable(s_, -2) == LUA_TFUNCTION) {
+    lua_pushvalue(s_, -2);
+    lua::CallProtected(s_, 1, 0);
+  } else {
+    lua_pop(s_, 1);
+  }
+
+  lua_pop(s_, 1);
+}
+
+auto Lua::canPop() -> bool {
+  if (!s_ || !obj_ref_) {
+    return true;
+  }
+  lua_rawgeti(s_, LUA_REGISTRYINDEX, *obj_ref_);
+  lua_pushliteral(s_, "canPop");
+
+  if (lua_gettable(s_, -2) == LUA_TFUNCTION) {
+    // If we got a callback instead of a value, then invoke it to turn it into
+    // value.
+    lua_pushvalue(s_, -2);
+    lua::CallProtected(s_, 1, 1);
+  }
+  bool ret = lua_toboolean(s_, -1);
+
+  lua_pop(s_, 2);
+  return ret;
+}
+
 auto Lua::SetObjRef(lua_State* s) -> void {
   assert(s_ == nullptr);
   s_ = s;