extremely aggressive scenedit autosave

src/fileio/fileio.cpp

@@ -33,7 +33,7 @@ bool mac_is_intel(){
 	}
 	return _mac_is_intel;
 }
-fs::path progDir, tempDir, scenDir, replayDir, saveDir;
+fs::path progDir, tempDir, scenDir, replayDir, saveDir, edAutoDir;
 
 // This is here to avoid unnecessarily duplicating it in platform-specific files.
 cursor_type Cursor::current = sword_curs;
@@ -84,6 +84,9 @@ void init_directories(const char* exec_path) {
 	saveDir = tempDir/"Saves";
 	fs::create_directories(saveDir);
 
+	edAutoDir = tempDir/"EditorAuto";
+	fs::create_directories(edAutoDir);
+
 	add_resmgr_paths(tempDir/"data");
 	tempDir /= "Temporary Files";
 	

src/scenedit/scen.fileio.cpp

@@ -1101,32 +1101,52 @@ struct overrides_sheet {
 	}
 };
 
+const int MAX_ED_AUTOSAVE_DEFAULT = 10; // TODO make a pref
+static fs::path next_autosave_path() {
+	extern fs::path edAutoDir;
+
+	auto ed_autosaves = sorted_file_mtimes(edAutoDir, {".boes"});
+
+	if(ed_autosaves.size() >= MAX_ED_AUTOSAVE_DEFAULT){
+		return ed_autosaves.back().first; // Reuse oldest auto slot
+	}else if(ed_autosaves.empty()){
+		return edAutoDir / "auto0.boes";
+	}else{
+		fs::path newest_auto = ed_autosaves[0].first;
+		int num = std::stoi(newest_auto.stem().string().substr(4)) + 1;
+		std::string temp = "auto" + std::to_string(num) + ".boes";
+		return edAutoDir / temp;
+	}
+}
+
 extern std::string scenario_temp_dir_name;
 extern fs::path scenDir;
-void save_scenario(bool rename) {
+void save_scenario(bool rename, bool autosave) {
 	fs::path toFile = scenario.scen_file;
-	if(rename || toFile.empty()) {
-		fs::path def = scenario.scen_file;
-		if(def.empty())
-			def = scenDir/"myscenario.boes";
-		toFile = nav_put_scenario(def);
-		if(toFile.empty()) return;
-	}
-	
-	if(fs::is_directory(toFile)) {
-		// Unpacked scenario
-		set_pref("LastScenario", (toFile / "header.exs").string());
-	}else{
-		set_pref("LastScenario", toFile.string());
-	}
-	save_prefs();
+	if(!autosave){
+		if(rename || toFile.empty()) {
+			fs::path def = scenario.scen_file;
+			if(def.empty())
+				def = scenDir/"myscenario.boes";
+			toFile = nav_put_scenario(def);
+			if(toFile.empty()) return;
+		}
 
-	extern cUndoList undo_list;
-	undo_list.save();
-	
-	if(scenario.is_legacy && cChoiceDlog("save-legacy-scen", {"update", "cancel"}).show() == "update")
-		scenario.is_legacy = false;
+		if(fs::is_directory(toFile)) {
+			// Unpacked scenario
+			set_pref("LastScenario", (toFile / "header.exs").string());
+		}else{
+			set_pref("LastScenario", toFile.string());
+		}
+		save_prefs();
+
+		extern cUndoList undo_list;
+		undo_list.save();
+
+		if(scenario.is_legacy && cChoiceDlog("save-legacy-scen", {"update", "cancel"}).show() == "update")
+			scenario.is_legacy = false;
 	
+	}
 	scenario.reset_version();
 	tarball scen_file;
 	{
@@ -1197,7 +1217,11 @@ void save_scenario(bool rename) {
 		writeDialogueToXml(ticpp::Printer("talk.xml", town_talk), scenario.towns[i]->talking, i);
 	}
 
-	change_made = false;
+	if(autosave){
+		toFile = next_autosave_path();
+	}else{
+		change_made = false;
+	}
 	
 	// Alright. At this point, check to see if the scenario was unpacked.
 	if(fs::is_directory(toFile)) {

src/scenedit/scen.fileio.hpp

@@ -1,5 +1,5 @@
 
-void save_scenario(bool rename = false);
+void save_scenario(bool rename = false, bool autosave = false);
 
 void start_data_dump();
 void scen_text_dump();

src/scenedit/scen.main.cpp

@@ -194,6 +194,10 @@ static void launch_scenario(eLaunchType type) {
 
 //Changed to ISO C specified argument and return type.
 int main(int argc, char* argv[]) {
+	extern cUndoList undo_list;
+	undo_list.onChange = []() -> void {
+		save_scenario(false, true);
+	};
 	try {
 		init_scened(argc, argv);
 		

src/tools/undo.cpp

@@ -43,12 +43,14 @@ void cUndoList::undo(){
 	if(noUndo()) return;
 	(*cur)->undo();
 	cur++;
+	if(onChange) onChange();
 }
 
 void cUndoList::redo(){
 	if(noRedo()) return;
 	cur--;
 	(*cur)->redo();
+	if(onChange) onChange();
 }
 
 std::string cUndoList::undoName() const {
@@ -91,4 +93,6 @@ void cUndoList::add(action_ptr what){
 		theList.pop_back();
 	}
 	cur = theList.begin();
+
+	if(onChange) onChange();
 }

src/tools/undo.hpp

@@ -93,6 +93,8 @@ public:
 	/// dropped from the front of the list.
 	/// Actions are only dropped when adding new actions.
 	static size_t maxUndoSize;
+	/// Called every time the list is updated either by performing something new, or and undo/redo call (but not on clear)
+	std::function<void()> onChange;
 };
 
 // As a special convention, I will prefix non-abstract action classes with 'a' instead of 'c'