WIP merge cyclically dependent components into one big component

1 files changed, 54 insertions, 0 deletions

diff --git a/src/tangara/lua/bridge.hpp b/src/tangara/lua/bridge.hpp
new file mode 100644
index 00000000..64f14e0e
--- /dev/null
+++ b/src/tangara/lua/bridge.hpp
@@ -0,0 +1,54 @@
+/*
+ * Copyright 2023 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#pragma once
+
+#include <memory>
+#include <string>
+
+#include "lua.hpp"
+#include "lvgl.h"
+#include "property.hpp"
+#include "service_locator.hpp"
+
+namespace lua {
+
+/*
+ * Responsible for adding C/C++ module bindings to Lua threads. This class
+ * keeps no thread-specific internal state, and instead uses the LUA_REGISTRY
+ * table of its host threads to store data.
+ */
+class Bridge {
+ public:
+  /*
+   * Utility for retrieving the Bridge from a Lua thread in which the Bridge's
+   * bindings have been installed. Use by Lua's C callbacks to access the rest
+   * of the system.
+   */
+  static auto Get(lua_State* state) -> Bridge*;
+
+  Bridge(system_fsm::ServiceLocator& s);
+
+  system_fsm::ServiceLocator& services() { return services_; }
+
+  auto installBaseModules(lua_State* L) -> void;
+  auto installLvgl(lua_State* L) -> void;
+  auto installPropertyModule(
+      lua_State* L,
+      const std::string&,
+      std::vector<
+          std::pair<std::string, std::variant<LuaFunction, Property*>>>&)
+      -> void;
+
+  Bridge(const Bridge&) = delete;
+  Bridge& operator=(const Bridge&) = delete;
+
+ private:
+  system_fsm::ServiceLocator& services_;
+  PropertyBindings bindings_;
+};
+
+}  // namespace lua