win32: optimize the console and logging logic

Currently one has to explicitly use --win32console and/or
--win32log to enable a dedicated console (a console window
that opens next to the Subsurface window) or to enable file
logging on Win32.

This patch makes the following changes:
- removes the --win32* command line arguments
- removes the dedicated console window support
- if the app starts from a shortcut and not from a console, always
redirect stderr and stdout to _err & _out log files
- if the app starts from a console redirect stderr and stdout to that
console

Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>

core/android.cpp

@@ -194,10 +194,8 @@ int subsurface_zip_close(struct zip *zip)
 }
 
 /* win32 console */
-void subsurface_console_init(bool dedicated, bool logfile)
+void subsurface_console_init(void)
 {
-	(void)dedicated;
-	(void)logfile;
 	/* NOP */
 }
 

core/dive.h

@@ -767,7 +767,7 @@ extern int subsurface_access(const char *path, int mode);
 extern int subsurface_stat(const char* path, struct stat* buf);
 extern struct zip *subsurface_zip_open_readonly(const char *path, int flags, int *errorp);
 extern int subsurface_zip_close(struct zip *zip);
-extern void subsurface_console_init(bool dedicated, bool logfile);
+extern void subsurface_console_init(void);
 extern void subsurface_console_exit(void);
 extern bool subsurface_user_is_root(void);
 

core/linux.c

@@ -221,10 +221,8 @@ int subsurface_zip_close(struct zip *zip)
 }
 
 /* win32 console */
-void subsurface_console_init(bool dedicated, bool logfile)
+void subsurface_console_init(void)
 {
-	(void)dedicated;
-	(void)logfile;
 	/* NOP */
 }
 

core/macos.c

@@ -207,10 +207,8 @@ int subsurface_zip_close(struct zip *zip)
 }
 
 /* win32 console */
-void subsurface_console_init(bool dedicated, bool logfile)
+void subsurface_console_init(void)
 {
-	(void)dedicated;
-	(void)logfile;
 	/* NOP */
 }
 

core/subsurfacestartup.c

@@ -197,8 +197,6 @@ static void print_help()
 	printf("\n --survey              Offer to submit a user survey");
 	printf("\n --user=<test>         Choose configuration space for user <test>");
 	printf("\n --cloud-timeout=<nr>  Set timeout for cloud connection (0 < timeout < 60)");
-	printf("\n --win32console        Create a dedicated console if needed (Windows only). Add option before everything else");
-	printf("\n --win32log            Write the program output to subsurface.log (Windows only). Add option before everything else\n\n");
 }
 
 void parse_argument(const char *arg)
@@ -254,10 +252,6 @@ void parse_argument(const char *arg)
 				++force_root;
 				return;
 			}
-			if (strcmp(arg, "--win32console") == 0)
-				return;
-			if (strcmp(arg, "--win32log") == 0)
-				return;
 		/* fallthrough */
 		case 'p':
 			/* ignore process serial number argument when run as native macosx app */

core/windows.c

@@ -390,7 +390,7 @@ static struct {
 	FILE *out, *err;
 } console_desc;
 
-void subsurface_console_init(bool dedicated, bool logfile)
+void subsurface_console_init(void)
 {
 	(void)console_desc;
 	/* if this is a console app already, do nothing */
@@ -398,50 +398,22 @@ void subsurface_console_init(bool dedicated, bool logfile)
 
 	/* just in case of multiple calls */
 	memset((void *)&console_desc, 0, sizeof(console_desc));
-	/* the AttachConsole(..) call can be used to determine if the parent process
-	 * is a terminal. if it succeeds, there is no need for a dedicated console
-	 * window and we don't need to call the AllocConsole() function. on the other
-	 * hand if the user has set the 'dedicated' flag to 'true' and if AttachConsole()
-	 * has failed, we create a dedicated console window.
+
+	/* if AttachConsole(ATTACH_PARENT_PROCESS) returns true the parent process
+	 * is a terminal. based on the result, either redirect to that terminal or
+	 * to log files.
 	 */
 	console_desc.allocated = AttachConsole(ATTACH_PARENT_PROCESS);
-	if (console_desc.allocated)
-		dedicated = false;
-	if (!console_desc.allocated && dedicated)
-		console_desc.allocated = AllocConsole();
-	if (!console_desc.allocated)
-		return;
-
+	if (console_desc.allocated) {
 		console_desc.cp = GetConsoleCP();
 		SetConsoleOutputCP(CP_UTF8); /* make the ouput utf8 */
-
-	/* set some console modes; we don't need to reset these back.
-	 * ENABLE_EXTENDED_FLAGS = 0x0080, ENABLE_QUICK_EDIT_MODE = 0x0040 */
-	HANDLE h_in = GetStdHandle(STD_INPUT_HANDLE);
-	if (h_in) {
-		SetConsoleMode(h_in, 0x0080 | 0x0040);
-		CloseHandle(h_in);
+		console_desc.out = freopen("CON", "w", stdout);
+		console_desc.err = freopen("CON", "w", stderr);
+	} else {
+		console_desc.out = freopen("subsurface_out.log", "w", stdout);
+		console_desc.err = freopen("subsurface_err.log", "w", stderr);
 	}
 
-	/* dedicated only; disable the 'x' button as it will close the main process as well */
-	HWND h_cw = GetConsoleWindow();
-	if (h_cw && dedicated) {
-		SetWindowTextA(h_cw, "Subsurface Console");
-		HMENU h_menu = GetSystemMenu(h_cw, 0);
-		if (h_menu) {
-			EnableMenuItem(h_menu, SC_CLOSE, MF_BYCOMMAND | MF_DISABLED);
-			DrawMenuBar(h_cw);
-		}
-		SetConsoleCtrlHandler(NULL, TRUE); /* disable the CTRL handler */
-	}
-
-	const char *location_out = logfile ? "subsurface_out.log" : "CON";
-	const char *location_err = logfile ? "subsurface_err.log" : "CON";
-
-	/* redirect; on win32, CON is a reserved pipe target, like NUL */
-	console_desc.out = freopen(location_out, "w", stdout);
-	console_desc.err = freopen(location_err, "w", stderr);
-	if (!dedicated)
 	puts(""); /* add an empty line */
 #endif
 }
@@ -449,18 +421,16 @@ void subsurface_console_init(bool dedicated, bool logfile)
 void subsurface_console_exit(void)
 {
 #ifndef WIN32_CONSOLE_APP
-	if (!console_desc.allocated)
-		return;
-
 	/* close handles */
 	if (console_desc.out)
 		fclose(console_desc.out);
 	if (console_desc.err)
 		fclose(console_desc.err);
-
 	/* reset code page and free */
+	if (console_desc.allocated) {
 		SetConsoleOutputCP(console_desc.cp);
 		FreeConsole();
+	}
 #endif
 }
 

subsurface-desktop-main.cpp

@@ -41,15 +41,7 @@ int main(int argc, char **argv)
 	QStringList importedFiles;
 	QStringList arguments = QCoreApplication::arguments();
 
-	bool win32_log = arguments.length() > 1 &&
-		(arguments.at(1) == QString("--win32log"));
-	if (win32_log) {
-		subsurface_console_init(true, true);
-	} else {
-		bool dedicated_console = arguments.length() > 1 &&
-			(arguments.at(1) == QString("--win32console"));
-		subsurface_console_init(dedicated_console, false);
-	}
+	subsurface_console_init();
 
 	const char *default_directory = system_default_directory();
 	const char *default_filename = system_default_filename();

subsurface-mobile-main.cpp

@@ -28,9 +28,7 @@ int main(int argc, char **argv)
 	(void)application;
 	QStringList arguments = QCoreApplication::arguments();
 
-	bool dedicated_console = arguments.length() > 1 &&
-				 (arguments.at(1) == QString("--win32console"));
-	subsurface_console_init(dedicated_console, false);
+	subsurface_console_init();
 
 	for (i = 1; i < arguments.length(); i++) {
 		QString a = arguments.at(i);