Android: Add system menu

The system menu opens with 3-finger touch. Currently, it can only exit
the game.

src/android/nact_android.cpp

@@ -47,6 +47,15 @@ void NACT::output_console(const char *format, ...)
 #endif
 }
 
-void NACT::on_syswmevent(SDL_SysWMmsg* msg)
+bool NACT::handle_platform_event(const SDL_Event& e)
 {
+	if (e.type == SDL_FINGERDOWN && SDL_GetNumTouchFingers(e.tfinger.touchId) == 3) {
+		JNILocalFrame jni(16);
+		if (jni.env()) {
+			jmethodID mid = jni.GetMethodID("popupMenu", "()V");
+			jni.env()->CallVoidMethod(jni.context(), mid);
+			return true;
+		}
+	}
+	return false;
 }

src/emscripten/nact_emscripten.cpp

@@ -42,6 +42,7 @@ void NACT::output_console(const char *format, ...)
 #endif
 }
 
-void NACT::on_syswmevent(SDL_SysWMmsg* msg)
+bool NACT::handle_platform_event(const SDL_Event& e)
 {
+	return false;
 }

src/linux/nact_linux.cpp

@@ -24,6 +24,7 @@ void NACT::output_console(const char *format, ...)
 #endif
 }
 
-void NACT::on_syswmevent(SDL_SysWMmsg* msg)
+bool NACT::handle_platform_event(const SDL_Event& e)
 {
+	return false;
 }

src/sys/mako.h

@@ -43,7 +43,7 @@ public:
 
 #ifdef _WIN32
 	void select_sound(BGMDevice dev);
-	void on_mci_notify(SDL_SysWMmsg* msg);
+	void on_mci_notify(const SDL_SysWMmsg* msg);
 #endif
 #ifdef __EMSCRIPTEN__
 	void select_synthesizer(bool use_fm);

src/sys/nact.h

@@ -267,7 +267,7 @@ public:
 
 private:
 	void pump_events();
-	void on_syswmevent(SDL_SysWMmsg* msg);
+	bool handle_platform_event(const SDL_Event& e);
 };
 
 class NACT_Sys1 final : public NACT {

src/sys/nact_input.cpp

@@ -19,6 +19,9 @@ void NACT::pump_events()
 {
 	SDL_Event e;
 	while (SDL_PollEvent(&e)) {
+		if (handle_platform_event(e))
+			continue;
+
 		switch (e.type) {
 		case SDL_QUIT:
 			terminate = true;
@@ -40,10 +43,6 @@ void NACT::pump_events()
 		case SDL_APP_DIDENTERFOREGROUND:
 			ags->flush_screen(false);
 			break;
-
-		case SDL_SYSWMEVENT:
-			on_syswmevent(e.syswm.msg);
-			break;
 		}
 	}
 }

src/win/mako.cpp

@@ -200,7 +200,7 @@ public:
 		return playing;
 	}
 
-	bool on_mci_notify(SDL_SysWMmsg* msg) {
+	bool on_mci_notify(const SDL_SysWMmsg* msg) {
 		if (msg->msg.win.lParam != mci_thread->device_id())
 			return true;
 		switch (msg->msg.win.wParam) {
@@ -421,7 +421,7 @@ bool MAKO::check_pcm()
 	return !PlaySound(null_wav, NULL, SND_ASYNC | SND_MEMORY | SND_NOSTOP);
 }
 
-void MAKO::on_mci_notify(SDL_SysWMmsg* msg)
+void MAKO::on_mci_notify(const SDL_SysWMmsg* msg)
 {
 	if (!music)
 		return;

src/win/nact_win.cpp

@@ -130,8 +130,12 @@ void NACT::output_console(const char *format, ...)
 #endif
 }
 
-void NACT::on_syswmevent(SDL_SysWMmsg* msg)
+bool NACT::handle_platform_event(const SDL_Event& e)
 {
+	if (e.type != SDL_SYSWMEVENT)
+		return false;
+	const SDL_SysWMmsg* msg = e.syswm.msg;
+
 	switch (msg->msg.win.msg) {
 	case WM_COMMAND:
 		switch (msg->msg.win.wParam) {
@@ -171,4 +175,5 @@ void NACT::on_syswmevent(SDL_SysWMmsg* msg)
 		mako->on_mci_notify(msg);
 		break;
 	}
+	return true;
 }