QtFRED - wire up file and edit menu controls (#7347)

* wire up file and edit menu controls

* linux

* more linux

* backup files don't go into the recent files list

Author: MjnMixael

qtfred/src/mission/Editor.cpp

@@ -133,6 +133,68 @@ void Editor::update() {
 	}
 }
 
+int Editor::autosave(const char* /*desc*/) {
+	if (autosaveDisabled || !_lastActiveViewport)
+		return 0;
+
+	Fred_mission_save save;
+	save.set_always_save_display_names(_lastActiveViewport->Always_save_display_names);
+	save.set_view_pos(_lastActiveViewport->view_pos);
+	save.set_view_orient(_lastActiveViewport->view_orient);
+	save.set_fred_alt_names(Fred_alt_names);
+	save.set_fred_callsigns(Fred_callsigns);
+
+	// autosave_mission_file() needs a mutable buffer because it reads but doesn't write through it
+	char backup_name_buf[] = MISSION_BACKUP_NAME;
+	if (save.autosave_mission_file(backup_name_buf)) {
+		undoCount = undoAvailable = 0;
+		return -1;
+	}
+
+	undoCount++;
+	checkUndo();
+	return 0;
+}
+
+int Editor::checkUndo() {
+	undoAvailable = 0;
+	if (undoCount == 0)
+		return 0;
+
+	// Undo is available when Backup.002 exists (Backup.001 is the current, .002 is what we load)
+	CFileLocation loc = cf_find_file_location("Backup.002", CF_TYPE_MISSIONS);
+	if (loc.found) {
+		undoAvailable = 1;
+		return 1;
+	}
+	return 0;
+}
+
+bool Editor::autoload() {
+	if (!undoAvailable || !_lastActiveViewport)
+		return false;
+
+	// Load the previous state from Backup.002
+	if (!loadMission("Backup.002", MPF_FAST_RELOAD))
+		return false;
+
+	// Delete Backup.001 (the state we just replaced)
+	cf_delete("Backup.001", CF_TYPE_MISSIONS);
+
+	// Rotate backups back one slot: .003->.002, .004->.003, etc, .009->.008
+	char old_name[256], new_name[256];
+	for (int i = 1; i < MISSION_BACKUP_DEPTH; i++) {
+		sprintf(old_name, "Backup.%.3d", i + 1);
+		sprintf(new_name, "Backup.%.3d", i);
+		cf_rename(old_name, new_name, CF_TYPE_MISSIONS);
+	}
+
+	if (undoCount > 0)
+		undoCount--;
+	checkUndo();
+	return true;
+}
+
 void Editor::maybeUseAutosave(std::string& filepath)
 {
 	// first, just grab the info of this mission
@@ -431,6 +493,11 @@ bool Editor::loadMission(const std::string& mission_name, int flags) {
 		scripting::hooks::FredOnMissionLoad->run();
 	}
 
+	if (!(flags & MPF_FAST_RELOAD)) {
+		undoCount = undoAvailable = 0;
+		autosave("nothing");
+	}
+
 	return true;
 }
 void Editor::clean_up_selections() {
@@ -824,6 +891,8 @@ void Editor::createNewMission() {
 	clearMission();
 	create_player(&vmd_zero_vector, &vmd_identity_matrix);
 	stars_post_level_init();
+	undoCount = undoAvailable = 0;
+	autosave("nothing");
 }
 void Editor::hideMarkedObjects() {
 	object* ptr;

qtfred/src/mission/Editor.h

@@ -135,6 +135,32 @@ class Editor : public QObject {
 	void objectMarkingChanged(int obj, bool marked);
 
   public:
+	// --- Undo / autosave state ---
+	int undoAvailable = 0;    ///< Whether an undo state (Backup.002) is available
+	int autosaveDisabled = 0; ///< When non-zero, autosave writes are suppressed
+
+	/**
+	 * @brief Rotate the backup stack and save the current mission state.
+	 *
+	 * Equivalent to CFREDDoc::autosave() in old FRED2.  Should be called after
+	 * any significant edit operation.  Does nothing when @c autosaveDisabled is set.
+	 *
+	 * @param desc Optional human-readable description of the operation being saved.
+	 * @return 0 on success, -1 if the backup write failed.
+	 */
+	int autosave(const char* desc = nullptr);
+
+	/**
+	 * @brief Restore the previous mission state from the backup stack.
+	 *
+	 * Equivalent to CFREDDoc::autoload() in old FRED2.
+	 * Caller is responsible for preserving and restoring the camera state and
+	 * @c saveName around this call.
+	 *
+	 * @return true on success, false if no undo state was available.
+	 */
+	bool autoload();
+
 	int Id_select_type_jump_node = 0;
 	int Id_select_type_waypoint = 0;
 
@@ -234,6 +260,11 @@ class Editor : public QObject {
 	SCP_vector<std::unique_ptr<EditorViewport>> _viewports;
 	EditorViewport* _lastActiveViewport = nullptr;
 
+	int undoCount = 0; ///< Number of autosave operations performed since last reset
+
+	/** @brief Check whether Backup.002 exists and update @c undoAvailable accordingly. */
+	int checkUndo();
+
 	int numMarked = 0;
 
 	SCP_vector<GlobalShieldStatus> Shield_sys_teams;

qtfred/src/mission/EditorViewport.cpp

@@ -614,8 +614,8 @@ void EditorViewport::level_controlled() {
 			level_object(&Objects[view_obj].orient);
 			object_moved(&Objects[view_obj]);
 			///! \todo Notify.
+			editor->autosave("level object");
 			editor->missionChanged();
-			//FREDDoc_ptr->autosave("level object");
 		}
 		break;
 
@@ -641,13 +641,7 @@ void EditorViewport::level_controlled() {
 
 		///! \todo Notify.
 		if (count) {
-			/*
-			if (count > 1)
-			FREDDoc_ptr->autosave("level objects");
-			else
-			FREDDoc_ptr->autosave("level object");
-			*/
-
+			editor->autosave(count > 1 ? "level objects" : "level object");
 			editor->missionChanged();
 		}
 
@@ -676,7 +670,7 @@ void EditorViewport::verticalize_controlled() {
 			verticalize_object(&Objects[view_obj].orient);
 			object_moved(&Objects[view_obj]);
 			///! \todo notify.
-			//FREDDoc_ptr->autosave("align object");
+			editor->autosave("align object");
 			editor->missionChanged();
 		}
 		break;
@@ -703,13 +697,7 @@ void EditorViewport::verticalize_controlled() {
 
 		///! \todo Notify.
 		if (count) {
-			/*
-			if (count > 1)
-			FREDDoc_ptr->autosave("align objects");
-			else
-			FREDDoc_ptr->autosave("align object");
-			*/
-
+			editor->autosave(count > 1 ? "align objects" : "align object");
 			editor->missionChanged();
 		}
 
@@ -1152,8 +1140,7 @@ int EditorViewport::create_object_on_grid(int x, int y, int waypoint_instance, b
 		if (obj >= 0) {
 			editor->markObject(obj);
 
-			// TODO: Add autosave here
-			// FREDDoc_ptr->autosave("object create");
+			editor->autosave("object create");
 
 		} else if (obj == -1) {
 			dialogProvider->showButtonDialog(DialogType::Error, "Error", "Maximum ship limit reached.  Can't add any more ships.", { DialogButton::Ok });