add window and user input

source/ui/user_input.cpp

@@ -0,0 +1,35 @@
+#include "user_input.hpp"
+
+namespace rog::ui {
+
+void user_input::set_key_state(key_code key, key_state state) {
+  const auto key_index = static_cast<int>(key);
+  if (key_index < this->state.keys.size()) {
+    this->state.keys[key_index] = state;
+  }
+}
+
+void user_input::set_mouse_pos(glm::vec2 pos) { state.mouse_pos = pos; }
+
+void user_input::set_mouse_button(mouse_button button, button_state state) {
+  this->state.mouse_buttons[static_cast<int>(button)] = state;
+}
+
+bool user_input::is_key_down(key_code code) const noexcept {
+  const auto idx = static_cast<int>(code);
+  return state.keys[idx] == key_state::pressed ||
+         state.keys[idx] == key_state::repeat ||
+         state.keys[idx] == key_state::held;
+}
+
+bool user_input::is_key_pressed(key_code code) const noexcept {
+  return state.keys[static_cast<int>(code)] == key_state::pressed;
+}
+
+glm::vec2 user_input::get_mouse_position() const noexcept {
+  return state.mouse_pos;
+}
+
+input_state user_input::current_state() const noexcept { return state; }
+
+} // namespace rog::ui