From 578a8bf0958a2cd76eee167c8f4022aab7d95061 Mon Sep 17 00:00:00 2001
From: kichikuou <KichikuouChrome@gmail.com>
Date: Sun, 26 Jun 2022 14:56:23 +0900
Subject: [PATCH] Emscripten: Expose sys_restart() function

---
 src/sdlmain.cpp        | 28 ++++++++++++++++++++--------
 src/sys/nact.cpp       |  8 +++++++-
 src/sys/nact.h         |  1 +
 src/sys/nact_input.cpp |  2 +-
 src/win/nact_win.cpp   |  4 ++--
 5 files changed, 31 insertions(+), 12 deletions(-)

diff --git a/src/sdlmain.cpp b/src/sdlmain.cpp
index 231b8a0..8fe64f1 100644
--- a/src/sdlmain.cpp
+++ b/src/sdlmain.cpp
@@ -15,6 +15,7 @@
 #endif
 
 SDL_Window* g_window;
+NACT* g_nact;
 
 int main(int argc, char *argv[])
 {
@@ -36,13 +37,13 @@ int main(int argc, char *argv[])
 	g_window = SDL_CreateWindow("Scenario Decoder SYSTEM3", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 640, 400, flags);
 
 	// system3 初期化
-	NACT* nact = NACT::create(config);
+	g_nact = NACT::create(config);
 
 	if (!config.save_dir.empty()) {
 		std::string path = config.save_dir;
 		if (path[path.size() - 1] == '@') {
 			path.pop_back();
-			const char* gid = nact->get_game_id();
+			const char* gid = g_nact->get_game_id();
 			if (gid) {
 				path += gid;
 #ifdef WIN32
@@ -55,17 +56,17 @@ int main(int argc, char *argv[])
 		FILEIO::SetSaveDir(path);
 	}
 
-	const char* title = nact->get_title();
+	const char* title = g_nact->get_title();
 	if (title) {
 		char buf[128];
-		sprintf_s(buf, 128, "Scenario Decoder SYSTEM%d: %s", nact->sys_ver, title);
+		sprintf_s(buf, 128, "Scenario Decoder SYSTEM%d: %s", g_nact->sys_ver, title);
 #ifdef __EMSCRIPTEN__
 		EM_ASM_ARGS({ xsystem35.shell.setWindowTitle(UTF8ToString($0)); }, buf);
 #else
 		SDL_SetWindowTitle(g_window, buf);
 #endif
 	} else {
-		WARNING("Cannot determine game id. crc32_a: %08x, crc32_b: %08x", nact->crc32_a, nact->crc32_b);
+		WARNING("Cannot determine game id. crc32_a: %08x, crc32_b: %08x", g_nact->crc32_a, g_nact->crc32_b);
 	}
 
 #ifdef __EMSCRIPTEN__
@@ -77,10 +78,10 @@ int main(int argc, char *argv[])
 
 	bool restart = true;
 	while (restart) {
-		restart = nact->mainloop();
-		delete nact;
+		restart = g_nact->mainloop();
+		delete g_nact;
 		if (restart)
-			nact = NACT::create(config);
+			g_nact = NACT::create(config);
 	}
 
 	SDL_DestroyWindow(g_window);
@@ -88,3 +89,14 @@ int main(int argc, char *argv[])
 
     return 0;
 }
+
+#ifdef __EMSCRIPTEN__
+
+extern "C"
+EMSCRIPTEN_KEEPALIVE
+void sys_restart()
+{
+	g_nact->quit(true);
+}
+
+#endif
diff --git a/src/sys/nact.cpp b/src/sys/nact.cpp
index 4e7d532..d79cf27 100644
--- a/src/sys/nact.cpp
+++ b/src/sys/nact.cpp
@@ -137,6 +137,12 @@ bool NACT::mainloop()
 	return restart_after_terminate;
 }
 
+void NACT::quit(bool restart)
+{
+	terminate = true;
+	restart_after_terminate = restart;
+}
+
 // コマンドパーサ
 
 EMSCRIPTEN_KEEPALIVE  // Prevent inlining, because this function is listed in ASYNCIFY_ADD
@@ -150,7 +156,7 @@ void NACT::execute()
 	// 致命的なエラー発生 or 正常終了
 	if(fatal_error) {
 		if(!post_quit) {
-			terminate = true;
+			quit(false);
 		}
 		post_quit = true;
 		return;
diff --git a/src/sys/nact.h b/src/sys/nact.h
index 684fe54..a3b0a6e 100644
--- a/src/sys/nact.h
+++ b/src/sys/nact.h
@@ -253,6 +253,7 @@ protected:
 public:
 	bool mainloop();
 	void sys_sleep(int ms);
+	void quit(bool restart);
 
 	int get_screen_height();
 
diff --git a/src/sys/nact_input.cpp b/src/sys/nact_input.cpp
index 70e30a9..8f714a8 100644
--- a/src/sys/nact_input.cpp
+++ b/src/sys/nact_input.cpp
@@ -25,7 +25,7 @@ void NACT::pump_events()
 
 		switch (e.type) {
 		case SDL_QUIT:
-			terminate = true;
+			quit(false);
 			break;
 
 		case SDL_WINDOWEVENT:
diff --git a/src/win/nact_win.cpp b/src/win/nact_win.cpp
index 2c3668a..b36c477 100644
--- a/src/win/nact_win.cpp
+++ b/src/win/nact_win.cpp
@@ -175,10 +175,10 @@ bool NACT::handle_platform_event(const SDL_Event& e)
 			save_screenshot(ags);
 			break;
 		case ID_RESTART:
-			terminate = restart_after_terminate = true;
+			quit(true);
 			break;
 		case ID_EXIT:
-			terminate = true;
+			quit(false);
 			break;
 		case ID_SCREEN_WINDOW:
 			SDL_SetWindowFullscreen(g_window, 0);