[HID] Pass 'is active' callback to input drivers.

src/xenia/hid/input_driver.h

@@ -10,7 +10,10 @@
 #ifndef XENIA_HID_INPUT_DRIVER_H_
 #define XENIA_HID_INPUT_DRIVER_H_
 
+#include <functional>
+
 #include "xenia/hid/input.h"
+#include "xenia/ui/window.h"
 #include "xenia/xbox.h"
 
 namespace xe {
@@ -38,10 +41,22 @@ class InputDriver {
   virtual X_RESULT GetKeystroke(uint32_t user_index, uint32_t flags,
                                 X_INPUT_KEYSTROKE* out_keystroke) = 0;
 
+  void set_is_active_callback(std::function<bool()> is_active_callback) {
+    is_active_callback_ = is_active_callback;
+  }
+
+ private:
+  xe::ui::Window* window_ = nullptr;
+  std::function<bool()> is_active_callback_ = nullptr;
+
  protected:
   explicit InputDriver(xe::ui::Window* window);
 
-  xe::ui::Window* window_ = nullptr;
+  xe::ui::Window* window() const { return window_; }
+
+  bool is_active() const {
+    return !is_active_callback_ || is_active_callback_();
+  }
 };
 
 }  // namespace hid

src/xenia/hid/sdl/sdl_input_driver.cc

@@ -65,7 +65,7 @@ X_STATUS SDLInputDriver::Setup() {
 
   // SDL_PumpEvents should only be run in the thread that initialized SDL - we
   // are hijacking the window loop thread for that.
-  window_->loop()->PostSynchronous([&]() {
+  window()->loop()->PostSynchronous([&]() {
     if (!xe::helper::sdl::SDLHelper::Prepare()) {
       return;
     }
@@ -385,7 +385,7 @@ X_RESULT SDLInputDriver::GetKeystroke(uint32_t users, uint32_t flags,
 }
 
 void SDLInputDriver::OnControllerDeviceAdded(SDL_Event* event) {
-  assert(window_->loop()->is_on_loop_thread());
+  assert(window()->loop()->is_on_loop_thread());
   std::unique_lock<std::mutex> guard(controllers_mutex_);
 
   // Open the controller.
@@ -424,7 +424,7 @@ void SDLInputDriver::OnControllerDeviceAdded(SDL_Event* event) {
 }
 
 void SDLInputDriver::OnControllerDeviceRemoved(SDL_Event* event) {
-  assert(window_->loop()->is_on_loop_thread());
+  assert(window()->loop()->is_on_loop_thread());
   std::unique_lock<std::mutex> guard(controllers_mutex_);
 
   // Find the disconnected gamecontroller and close it.
@@ -436,7 +436,7 @@ void SDLInputDriver::OnControllerDeviceRemoved(SDL_Event* event) {
 }
 
 void SDLInputDriver::OnControllerDeviceAxisMotion(SDL_Event* event) {
-  assert(window_->loop()->is_on_loop_thread());
+  assert(window()->loop()->is_on_loop_thread());
   std::unique_lock<std::mutex> guard(controllers_mutex_);
 
   auto [found, i] = GetControllerIndexFromInstanceID(event->caxis.which);
@@ -469,7 +469,7 @@ void SDLInputDriver::OnControllerDeviceAxisMotion(SDL_Event* event) {
 }
 
 void SDLInputDriver::OnControllerDeviceButtonChanged(SDL_Event* event) {
-  assert(window_->loop()->is_on_loop_thread());
+  assert(window()->loop()->is_on_loop_thread());
   std::unique_lock<std::mutex> guard(controllers_mutex_);
 
   // Define a lookup table to map between SDL and XInput button codes.
@@ -569,7 +569,7 @@ void SDLInputDriver::QueueControllerUpdate() {
   bool is_queued = false;
   sdl_pumpevents_queued_.compare_exchange_strong(is_queued, true);
   if (!is_queued) {
-    window_->loop()->Post([this]() {
+    window()->loop()->Post([this]() {
       SDL_PumpEvents();
       sdl_pumpevents_queued_ = false;
     });

src/xenia/hid/winkey/winkey_input_driver.cc

@@ -21,7 +21,7 @@ namespace winkey {
 WinKeyInputDriver::WinKeyInputDriver(xe::ui::Window* window)
     : InputDriver(window), packet_number_(1) {
   // Register a key listener.
-  window_->on_key_down.AddListener([this](ui::KeyEvent* evt) {
+  window->on_key_down.AddListener([this](ui::KeyEvent* evt) {
     auto global_lock = global_critical_region_.Acquire();
 
     KeyEvent key;
@@ -31,7 +31,7 @@ WinKeyInputDriver::WinKeyInputDriver(xe::ui::Window* window)
     key.repeat_count = evt->repeat_count();
     key_events_.push(key);
   });
-  window_->on_key_up.AddListener([this](ui::KeyEvent* evt) {
+  window->on_key_up.AddListener([this](ui::KeyEvent* evt) {
     auto global_lock = global_critical_region_.Acquire();
 
     KeyEvent key;
@@ -88,7 +88,7 @@ X_RESULT WinKeyInputDriver::GetState(uint32_t user_index,
   int16_t thumb_rx = 0;
   int16_t thumb_ry = 0;
 
-  if (window_->has_focus()) {
+  if (window()->has_focus()) {
     if (IS_KEY_TOGGLED(VK_CAPITAL) || IS_KEY_DOWN(VK_SHIFT)) {
       // dpad toggled
       if (IS_KEY_DOWN('A')) {