From f1fdd4e7e3dbb6d7d236912e4a26b3df15c0bd17 Mon Sep 17 00:00:00 2001
From: Thomas Debesse <dev@illwieckz.net>
Date: Sun, 14 Jul 2019 02:53:50 +0200
Subject: [PATCH] radiant: code to make radiant able to restart itself

- save preferences
- check for map being modified (this asks user for saving if not yet saved)
- check for a map being currently edited
- start a new instance, with the current map as parameter if exists
- quit current instance if new instance started correctly
---
 radiant/mainframe.cpp   | 47 +++++++++++++++++++++++++++++++++++++++++
 radiant/mainframe.h     |  2 ++
 radiant/preferences.cpp |  2 ++
 3 files changed, 51 insertions(+)

diff --git a/radiant/mainframe.cpp b/radiant/mainframe.cpp
index d3e86900..663ca303 100644
--- a/radiant/mainframe.cpp
+++ b/radiant/mainframe.cpp
@@ -101,6 +101,12 @@
 #include "referencecache.h"
 #include "texwindow.h"
 
+#if GDEF_OS_WINDOWS
+#include <process.h>
+#else
+#include <spawn.h>
+#endif
+
 #ifdef WORKAROUND_WINDOWS_GTK2_GLWIDGET
 /* workaround for gtk 2.24 issue: not displayed glwidget after toggle */
 #define WORKAROUND_GOBJECT_SET_GLWIDGET(window, widget) g_object_set_data( G_OBJECT( window ), "glwidget", G_OBJECT( widget ) )
@@ -3616,3 +3622,44 @@ void GLWindow_Construct(){
 
 void GLWindow_Destroy(){
 }
+
+void Radiant_Restart(){
+	// preferences are expected to be already saved in any way
+	// this is just to be sure and be future proof
+	Preferences_Save();
+
+	// this asks user for saving if map is modified
+	// user can chose to not save, it's ok
+	ConfirmModified( "Restart " RADIANT_NAME );
+
+	int status;
+
+	char *argv[ 3 ];
+	char exe_file[ 256 ];
+	char map_file[ 256 ];
+	bool with_map = false;
+
+	strncpy( exe_file, g_strAppFilePath.c_str(), 256 );
+
+	if ( !Map_Unnamed( g_map ) ) {
+		strncpy( map_file, Map_Name( g_map ), 256 );
+		with_map = true;
+	}
+
+	argv[ 0 ] = exe_file;
+	argv[ 1 ] = with_map ? map_file : NULL;
+	argv[ 2 ] = NULL;
+
+#if GDEF_OS_WINDOWS
+	status = !_spawnvpe( P_NOWAIT, exe_file, argv, environ );
+#else
+	pid_t pid;
+
+	status = posix_spawn( &pid, exe_file, NULL, NULL, argv, environ );
+#endif
+
+	// quit if radiant successfully started
+	if ( status == 0 ) {
+		gtk_main_quit();
+	}
+}
diff --git a/radiant/mainframe.h b/radiant/mainframe.h
index f101c25e..ca0c4c97 100644
--- a/radiant/mainframe.h
+++ b/radiant/mainframe.h
@@ -271,6 +271,8 @@ void Radiant_detachHomePathsObserver( ModuleObserver& observer );
 void MainFrame_Construct();
 void MainFrame_Destroy();
 
+extern char **environ;
+void Radiant_Restart();
 
 extern float ( *GridStatus_getGridSize )();
 extern int ( *GridStatus_getRotateIncrement )();
diff --git a/radiant/preferences.cpp b/radiant/preferences.cpp
index 14a39f71..e31bc048 100644
--- a/radiant/preferences.cpp
+++ b/radiant/preferences.cpp
@@ -909,10 +909,12 @@ void PreferencesDialog_showDialog(){
 		if ( !g_restart_required.empty() ) {
 			StringOutputStream message( 256 );
 			message << "Preference changes require a restart:\n";
+
 			for ( std::vector<const char*>::iterator i = g_restart_required.begin(); i != g_restart_required.end(); ++i )
 			{
 				message << ( *i ) << '\n';
 			}
+
 			ui::alert( MainFrame_getWindow(), message.c_str() );
 			g_restart_required.clear();
 		}
-- 
2.39.2