Extract node lifecycle, preview runtime, and Win32 input state

src/platform_windows/windows_window_shell.cpp

@@ -13,6 +13,31 @@ void destroy_window();
 
 namespace pp::platform::windows {
 
+void initialize_retained_input_state()
+{
+    auto& state = retained_state();
+    memset(&state.keys, 0, sizeof(state.keys));
+    for (int k = 1; k < 256; ++k) // ignore kKey::Unknown = 0
+    {
+        for (int vk = 0; vk < 256; ++vk)
+        {
+            if (k != (int)convert_key(vk))
+                continue;
+
+            auto key = (kKey)k;
+            if (state.vkey_map.find(key) == state.vkey_map.end())
+            {
+                state.vkey_map.insert({ key, vk });
+            }
+            else
+            {
+                LOG("KEY MAP COLLISION %d and %d maps to %d",
+                    vk, state.vkey_map[key], k);
+            }
+        }
+    }
+}
+
 RetainedState& retained_state()
 {
     static RetainedState state;

src/platform_windows/windows_window_shell.h

@@ -19,6 +19,7 @@ struct RetainedState
 
 namespace pp::platform::windows {
 
+void initialize_retained_input_state();
 RetainedState& retained_state();
 LRESULT CALLBACK main_window_proc(HWND hWnd, UINT msg, WPARAM wp, LPARAM lp);