Core/Host: Allow frontends to block inputs

Source/Android/jni/MainAndroid.cpp

@@ -94,6 +94,10 @@ void Host_NotifyMapLoaded()
 void Host_RefreshDSPDebuggerWindow()
 {
 }
+bool Host_UIBlocksControllerState()
+{
+  return false;
+}
 
 void Host_Message(HostMessageID id)
 {

Source/Core/Core/Host.h

@@ -33,6 +33,7 @@ enum class HostMessageID
 };
 
 bool Host_UINeedsControllerState();
+bool Host_UIBlocksControllerState();
 bool Host_RendererHasFocus();
 bool Host_RendererIsFullscreen();
 void Host_Message(HostMessageID id);

Source/Core/DolphinNoGUI/MainNoGUI.cpp

@@ -52,6 +52,11 @@ void Host_RefreshDSPDebuggerWindow()
 {
 }
 
+bool Host_UIBlocksControllerState()
+{
+  return false;
+}
+
 static Common::Event s_update_main_frame_event;
 void Host_Message(HostMessageID id)
 {

Source/Core/DolphinQt/Host.cpp

@@ -151,6 +151,12 @@ bool Host_UINeedsControllerState()
 {
   return Settings::Instance().IsControllerStateNeeded();
 }
+
+bool Host_UIBlocksControllerState()
+{
+  return ImGui::GetCurrentContext() && ImGui::GetIO().WantCaptureKeyboard;
+}
+
 void Host_RefreshDSPDebuggerWindow()
 {
 }

Source/Core/InputCommon/ControlReference/ControlReference.cpp

@@ -14,8 +14,9 @@ using namespace ciface::ExpressionParser;
 
 bool ControlReference::InputGateOn()
 {
-  return SConfig::GetInstance().m_BackgroundInput || Host_RendererHasFocus() ||
+  return (SConfig::GetInstance().m_BackgroundInput || Host_RendererHasFocus() ||
-         Host_UINeedsControllerState();
+          Host_UINeedsControllerState()) &&
+         !Host_UIBlocksControllerState();
 }
 
 //

Source/UnitTests/StubHost.cpp

@@ -35,6 +35,10 @@ bool Host_UINeedsControllerState()
 {
   return false;
 }
+bool Host_UIBlocksControllerState()
+{
+  return false;
+}
 bool Host_RendererHasFocus()
 {
   return false;