Merge 643dcefc8f into 9ce2aca949

The mask was treated as a single RoadStopDrawMode instead of a RoadStopDrawModes bitset.

src/driver.cpp

@@ -134,7 +134,7 @@ bool DriverFactoryBase::SelectDriverImpl(const std::string &name, Driver::Type t
 						Debug(driver, 1, "Probing {} driver '{}' skipped due to earlier crash", GetDriverTypeName(type), d->name);
 
 						_video_hw_accel = false;
-						ErrorMessageData msg(GetEncodedString(STR_VIDEO_DRIVER_ERROR), GetEncodedString(STR_VIDEO_DRIVER_ERROR_HARDWARE_ACCELERATION_CRASH), true);
+						ErrorMessageData msg(GetEncodedString(STR_VIDEO_DRIVER_ERROR), GetEncodedString(STR_VIDEO_DRIVER_ERROR_HARDWARE_ACCELERATION_CRASH), WL_CRITICAL);
 						ScheduleErrorMessage(std::move(msg));
 						continue;
 					}
@@ -158,7 +158,7 @@ bool DriverFactoryBase::SelectDriverImpl(const std::string &name, Driver::Type t
 
 				if (type == Driver::DT_VIDEO && _video_hw_accel && d->UsesHardwareAcceleration()) {
 					_video_hw_accel = false;
-					ErrorMessageData msg(GetEncodedString(STR_VIDEO_DRIVER_ERROR), GetEncodedString(STR_VIDEO_DRIVER_ERROR_NO_HARDWARE_ACCELERATION), true);
+					ErrorMessageData msg(GetEncodedString(STR_VIDEO_DRIVER_ERROR), GetEncodedString(STR_VIDEO_DRIVER_ERROR_NO_HARDWARE_ACCELERATION), WL_CRITICAL);
 					ScheduleErrorMessage(std::move(msg));
 				}
 			}

src/error.h

@@ -30,7 +30,7 @@ enum WarningLevel : uint8_t {
 /** The data of the error message. */
 class ErrorMessageData {
 protected:
-	bool is_critical;               ///< Whether the error message is critical.
+	WarningLevel level; ///< Level of the error message (e.g. whether it's a critical error).
 	EncodedString summary_msg; ///< General error message showed in first line. Must be valid.
 	EncodedString detailed_msg; ///< Detailed error message showed in second line. Can be #INVALID_STRING_ID.
 	EncodedString extra_msg; ///< Extra error message shown in third line. Can be #INVALID_STRING_ID.
@@ -38,7 +38,7 @@ protected:
 	CompanyID company; ///< Company belonging to the face being shown. #CompanyID::Invalid() if no face present.
 
 public:
-	ErrorMessageData(EncodedString &&summary_msg, EncodedString &&detailed_msg, bool is_critical = false, int x = 0, int y = 0, EncodedString &&extra_msg = {}, CompanyID company = CompanyID::Invalid());
+	ErrorMessageData(EncodedString &&summary_msg, EncodedString &&detailed_msg, WarningLevel level = WL_ERROR, int x = 0, int y = 0, EncodedString &&extra_msg = {}, CompanyID company = CompanyID::Invalid());
 
 	/** Check whether error window shall display a company manager face */
 	bool HasFace() const { return company != CompanyID::Invalid(); }

src/error_gui.cpp

@@ -35,10 +35,10 @@
 
 static constexpr NWidgetPart _nested_errmsg_widgets[] = {
 	NWidget(NWID_HORIZONTAL),
-		NWidget(WWT_CLOSEBOX, COLOUR_RED),
+		NWidget(WWT_CLOSEBOX, COLOUR_RED, WID_EM_CLOSEBOX),
 		NWidget(WWT_CAPTION, COLOUR_RED, WID_EM_CAPTION), SetStringTip(STR_ERROR_MESSAGE_CAPTION),
 	EndContainer(),
-	NWidget(WWT_PANEL, COLOUR_RED),
+	NWidget(WWT_PANEL, COLOUR_RED, WID_EM_PANEL),
 		NWidget(WWT_EMPTY, INVALID_COLOUR, WID_EM_MESSAGE), SetPadding(WidgetDimensions::unscaled.modalpopup), SetFill(1, 0), SetMinimalSize(236, 0),
 	EndContainer(),
 };
@@ -52,10 +52,10 @@ static WindowDesc _errmsg_desc(
 
 static constexpr NWidgetPart _nested_errmsg_face_widgets[] = {
 	NWidget(NWID_HORIZONTAL),
-		NWidget(WWT_CLOSEBOX, COLOUR_RED),
+		NWidget(WWT_CLOSEBOX, COLOUR_RED, WID_EM_CLOSEBOX),
 		NWidget(WWT_CAPTION, COLOUR_RED, WID_EM_CAPTION),
 	EndContainer(),
-	NWidget(WWT_PANEL, COLOUR_RED),
+	NWidget(WWT_PANEL, COLOUR_RED, WID_EM_PANEL),
 		NWidget(NWID_HORIZONTAL),
 			NWidget(WWT_EMPTY, INVALID_COLOUR, WID_EM_FACE), SetPadding(2, 0, 2, 2), SetFill(0, 1), SetMinimalSize(92, 119),
 			NWidget(WWT_EMPTY, INVALID_COLOUR, WID_EM_MESSAGE), SetPadding(WidgetDimensions::unscaled.modalpopup), SetFill(1, 1), SetMinimalSize(236, 0),
@@ -74,13 +74,13 @@ static WindowDesc _errmsg_face_desc(
  * Display an error message in a window.
  * @param summary_msg  General error message showed in first line. Must be valid.
  * @param detailed_msg Detailed error message showed in second line. Can be empty.
- * @param is_critical  Whether the error is critical. Critical messages never go away on their own.
+ * @param level        Warning/error level of the message. NOTE: critical messages never go away on their own.
  * @param x            World X position (TileVirtX) of the error location. Set both x and y to 0 to just center the message when there is no related error tile.
  * @param y            World Y position (TileVirtY) of the error location. Set both x and y to 0 to just center the message when there is no related error tile.
  * @param extra_msg    Extra error message showed in third line. Can be empty.
  */
-ErrorMessageData::ErrorMessageData(EncodedString &&summary_msg, EncodedString &&detailed_msg, bool is_critical, int x, int y, EncodedString &&extra_msg, CompanyID company) :
+ErrorMessageData::ErrorMessageData(EncodedString &&summary_msg, EncodedString &&detailed_msg, WarningLevel level, int x, int y, EncodedString &&extra_msg, CompanyID company) :
-	is_critical(is_critical),
+	level(level),
 	summary_msg(std::move(summary_msg)),
 	detailed_msg(std::move(detailed_msg)),
 	extra_msg(std::move(extra_msg)),
@@ -113,8 +113,15 @@ public:
 	{
 		this->InitNested();
 
+		Colours window_colour = COLOUR_RED;
+		if (level == WL_INFO) window_colour = COLOUR_GREEN;
+		if (level == WL_WARNING) window_colour = COLOUR_ORANGE;
+		this->GetWidget<NWidgetCore>(WID_EM_CAPTION)->colour = window_colour;
+		this->GetWidget<NWidgetCore>(WID_EM_CLOSEBOX)->colour = window_colour;
+		this->GetWidget<NWidgetCore>(WID_EM_PANEL)->colour = window_colour;
+
 		/* Only start the timeout if the message is not critical. */
-		if (!this->is_critical) {
+		if (this->level != WL_CRITICAL) {
 			this->display_timeout.Reset();
 		}
 	}
@@ -225,7 +232,7 @@ public:
 	void OnMouseLoop() override
 	{
 		/* Disallow closing the window too easily, if timeout is disabled */
-		if (_right_button_down && !this->is_critical) this->Close();
+		if (_right_button_down && this->level != WL_CRITICAL) this->Close();
 	}
 
 	void Close([[maybe_unused]] int data = 0) override
@@ -241,7 +248,7 @@ public:
 	 */
 	bool IsCritical()
 	{
-		return this->is_critical;
+		return this->level == WL_CRITICAL;
 	}
 };
 
@@ -281,7 +288,7 @@ void UnshowCriticalError()
 
 /**
  * Display an error message in a window.
- * Note: CommandCost errors are always severity level WL_INFO.
+ * Note: CommandCost errors are always severity level WL_ERROR.
  * @param summary_msg  General error message showed in first line. Must be valid.
  * @param x            World X position (TileVirtX) of the error location. Set both x and y to 0 to just center the message when there is no related error tile.
  * @param y            World Y position (TileVirtY) of the error location. Set both x and y to 0 to just center the message when there is no related error tile.
@@ -292,7 +299,7 @@ void ShowErrorMessage(EncodedString &&summary_msg, int x, int y, CommandCost &cc
 	EncodedString error = std::move(cc.GetEncodedMessage());
 	if (error.empty()) error = GetEncodedStringIfValid(cc.GetErrorMessage());
 
-	ShowErrorMessage(std::move(summary_msg), std::move(error), WL_INFO, x, y,
+	ShowErrorMessage(std::move(summary_msg), std::move(error), WL_ERROR, x, y,
 		GetEncodedStringIfValid(cc.GetExtraErrorMessage()), cc.GetErrorOwner());
 }
 
@@ -323,12 +330,10 @@ void ShowErrorMessage(EncodedString &&summary_msg, EncodedString &&detailed_msg,
 		IConsolePrint(wl == WL_WARNING ? CC_WARNING : CC_ERROR, message);
 	}
 
-	bool is_critical = wl == WL_CRITICAL;
-
 	if (_game_mode == GM_BOOTSTRAP) return;
-	if (_settings_client.gui.errmsg_duration == 0 && !is_critical) return;
+	if (_settings_client.gui.errmsg_duration == 0 && wl != WL_CRITICAL) return;
 
-	ErrorMessageData data(std::move(summary_msg), std::move(detailed_msg), is_critical, x, y, std::move(extra_msg), company);
+	ErrorMessageData data(std::move(summary_msg), std::move(detailed_msg), wl, x, y, std::move(extra_msg), company);
 
 	ErrmsgWindow *w = dynamic_cast<ErrmsgWindow *>(FindWindowById(WC_ERRMSG, 0));
 	if (w != nullptr) {

src/fontcache/spritefontcache.cpp

@@ -103,14 +103,14 @@ void SpriteFontCache::ClearFontCache()
 
 const Sprite *SpriteFontCache::GetGlyph(GlyphID key)
 {
-	SpriteID sprite = this->GetUnicodeGlyph(static_cast<char32_t>(key & ~SPRITE_GLYPH));
+	SpriteID sprite = static_cast<SpriteID>(key & ~SPRITE_GLYPH);
 	if (sprite == 0) sprite = this->GetUnicodeGlyph('?');
 	return GetSprite(sprite, SpriteType::Font);
 }
 
 uint SpriteFontCache::GetGlyphWidth(GlyphID key)
 {
-	SpriteID sprite = this->GetUnicodeGlyph(static_cast<char32_t>(key & ~SPRITE_GLYPH));
+	SpriteID sprite = static_cast<SpriteID>(key & ~SPRITE_GLYPH);
 	if (sprite == 0) sprite = this->GetUnicodeGlyph('?');
 	return SpriteExists(sprite) ? GetSprite(sprite, SpriteType::Font)->width + ScaleFontTrad(this->fs != FS_NORMAL ? 1 : 0) : 0;
 }
@@ -120,7 +120,7 @@ GlyphID SpriteFontCache::MapCharToGlyph(char32_t key, [[maybe_unused]] bool allo
 	assert(IsPrintable(key));
 	SpriteID sprite = this->GetUnicodeGlyph(key);
 	if (sprite == 0) return 0;
-	return SPRITE_GLYPH | key;
+	return SPRITE_GLYPH | sprite;
 }
 
 bool SpriteFontCache::GetDrawGlyphShadow()

src/newgrf/newgrf_act0_roadstops.cpp

@@ -105,8 +105,8 @@ static ChangeInfoResult RoadStopChangeInfo(uint first, uint last, int prop, Byte
 				AddStringForMapping(GRFStringID{buf.ReadWord()}, [rs = rs.get()](StringID str) { RoadStopClass::Get(rs->class_index)->name = str; });
 				break;
 
-			case 0x0C: // The draw mode
+			case 0x0C: // The draw modes
-				rs->draw_mode = static_cast<RoadStopDrawMode>(buf.ReadByte());
+				rs->draw_mode = static_cast<RoadStopDrawModes>(buf.ReadByte());
 				break;
 
 			case 0x0D: // Cargo types for random triggers

src/newgrf_roadstop.cpp

@@ -298,7 +298,7 @@ void DrawRoadStopTile(int x, int y, RoadType roadtype, const RoadStopSpec *spec,
 
 	RoadStopDrawModes draw_mode;
 	if (spec->flags.Test(RoadStopSpecFlag::DrawModeRegister)) {
-		draw_mode = static_cast<RoadStopDrawMode>(object.GetRegister(0x100));
+		draw_mode = static_cast<RoadStopDrawModes>(object.GetRegister(0x100));
 	} else {
 		draw_mode = spec->draw_mode;
 	}

src/script/api/script_controller.cpp

@@ -76,7 +76,7 @@ ScriptController::ScriptController(::CompanyID company) :
 
 /* static */ uint ScriptController::GetTick()
 {
-	return ScriptObject::GetActiveInstance().GetController()->ticks;
+	return ScriptObject::GetActiveInstance().GetController().ticks;
 }
 
 /* static */ int ScriptController::GetOpsTillSuspend()
@@ -96,9 +96,9 @@ ScriptController::ScriptController(::CompanyID company) :
 
 /* static */ HSQOBJECT ScriptController::Import(const std::string &library, const std::string &class_name, int version)
 {
-	ScriptController *controller = ScriptObject::GetActiveInstance().GetController();
+	ScriptController &controller = ScriptObject::GetActiveInstance().GetController();
-	Squirrel *engine = ScriptObject::GetActiveInstance().engine;
+	Squirrel &engine = *ScriptObject::GetActiveInstance().engine;
-	HSQUIRRELVM vm = engine->GetVM();
+	HSQUIRRELVM vm = engine.GetVM();
 
 	ScriptInfo *lib = ScriptObject::GetActiveInstance().FindLibrary(library, version);
 	if (lib == nullptr) {
@@ -114,11 +114,11 @@ ScriptController::ScriptController(::CompanyID company) :
 
 	std::string fake_class;
 
-	LoadedLibraryList::iterator it = controller->loaded_library.find(library_name);
+	LoadedLibraryList::iterator it = controller.loaded_library.find(library_name);
-	if (it != controller->loaded_library.end()) {
+	if (it != controller.loaded_library.end()) {
 		fake_class = (*it).second;
 	} else {
-		int next_number = ++controller->loaded_library_count;
+		int next_number = ++controller.loaded_library_count;
 
 		/* Create a new fake internal name */
 		fake_class = fmt::format("_internalNA{}", next_number);
@@ -128,14 +128,14 @@ ScriptController::ScriptController(::CompanyID company) :
 		sq_pushstring(vm, fake_class);
 		sq_newclass(vm, SQFalse);
 		/* Load the library */
-		if (!engine->LoadScript(vm, lib->GetMainScript(), false)) {
+		if (!engine.LoadScript(vm, lib->GetMainScript(), false)) {
 			throw sq_throwerror(vm, fmt::format("there was a compile error when importing '{}' version {}", library, version));
 		}
 		/* Create the fake class */
 		sq_newslot(vm, -3, SQFalse);
 		sq_pop(vm, 1);
 
-		controller->loaded_library[library_name] = fake_class;
+		controller.loaded_library[library_name] = fake_class;
 	}
 
 	/* Find the real class inside the fake class (like 'sets.Vector') */

src/script/api/script_object.cpp

@@ -45,7 +45,7 @@ void SimpleCountedObject::Release()
  * Get the storage associated with the current ScriptInstance.
  * @return The storage.
  */
-static ScriptStorage *GetStorage()
+static ScriptStorage &GetStorage()
 {
 	return ScriptObject::GetActiveInstance().GetStorage();
 }
@@ -65,7 +65,7 @@ ScriptObject::ActiveInstance::~ActiveInstance()
 }
 
 ScriptObject::DisableDoCommandScope::DisableDoCommandScope()
-	: AutoRestoreBackup(GetStorage()->allow_do_command, false)
+	: AutoRestoreBackup(GetStorage().allow_do_command, false)
 {}
 
 /* static */ ScriptInstance &ScriptObject::GetActiveInstance()
@@ -78,181 +78,181 @@ ScriptObject::DisableDoCommandScope::DisableDoCommandScope()
 /* static */ void ScriptObject::SetDoCommandDelay(uint ticks)
 {
 	assert(ticks > 0);
-	GetStorage()->delay = ticks;
+	GetStorage().delay = ticks;
 }
 
 /* static */ uint ScriptObject::GetDoCommandDelay()
 {
-	return GetStorage()->delay;
+	return GetStorage().delay;
 }
 
 /* static */ void ScriptObject::SetDoCommandMode(ScriptModeProc *proc, ScriptObject *instance)
 {
-	GetStorage()->mode = proc;
+	GetStorage().mode = proc;
-	GetStorage()->mode_instance = instance;
+	GetStorage().mode_instance = instance;
 }
 
 /* static */ ScriptModeProc *ScriptObject::GetDoCommandMode()
 {
-	return GetStorage()->mode;
+	return GetStorage().mode;
 }
 
 /* static */ ScriptObject *ScriptObject::GetDoCommandModeInstance()
 {
-	return GetStorage()->mode_instance;
+	return GetStorage().mode_instance;
 }
 
 /* static */ void ScriptObject::SetDoCommandAsyncMode(ScriptAsyncModeProc *proc, ScriptObject *instance)
 {
-	GetStorage()->async_mode = proc;
+	GetStorage().async_mode = proc;
-	GetStorage()->async_mode_instance = instance;
+	GetStorage().async_mode_instance = instance;
 }
 
 /* static */ ScriptAsyncModeProc *ScriptObject::GetDoCommandAsyncMode()
 {
-	return GetStorage()->async_mode;
+	return GetStorage().async_mode;
 }
 
 /* static */ ScriptObject *ScriptObject::GetDoCommandAsyncModeInstance()
 {
-	return GetStorage()->async_mode_instance;
+	return GetStorage().async_mode_instance;
 }
 
 /* static */ void ScriptObject::SetLastCommand(const CommandDataBuffer &data, Commands cmd)
 {
-	ScriptStorage *s = GetStorage();
+	ScriptStorage &s = GetStorage();
-	Debug(script, 6, "SetLastCommand company={:02d} cmd={} data={}", s->root_company, cmd, FormatArrayAsHex(data));
+	Debug(script, 6, "SetLastCommand company={:02d} cmd={} data={}", s.root_company, cmd, FormatArrayAsHex(data));
-	s->last_data = data;
+	s.last_data = data;
-	s->last_cmd = cmd;
+	s.last_cmd = cmd;
 }
 
 /* static */ bool ScriptObject::CheckLastCommand(const CommandDataBuffer &data, Commands cmd)
 {
-	ScriptStorage *s = GetStorage();
+	ScriptStorage &s = GetStorage();
-	Debug(script, 6, "CheckLastCommand company={:02d} cmd={} data={}", s->root_company, cmd, FormatArrayAsHex(data));
+	Debug(script, 6, "CheckLastCommand company={:02d} cmd={} data={}", s.root_company, cmd, FormatArrayAsHex(data));
-	if (s->last_cmd != cmd) return false;
+	if (s.last_cmd != cmd) return false;
-	if (s->last_data != data) return false;
+	if (s.last_data != data) return false;
 	return true;
 }
 
 /* static */ void ScriptObject::SetDoCommandCosts(Money value)
 {
-	GetStorage()->costs = CommandCost(INVALID_EXPENSES, value); // Expense type is never read.
+	GetStorage().costs = CommandCost(INVALID_EXPENSES, value); // Expense type is never read.
 }
 
 /* static */ void ScriptObject::IncreaseDoCommandCosts(Money value)
 {
-	GetStorage()->costs.AddCost(value);
+	GetStorage().costs.AddCost(value);
 }
 
 /* static */ Money ScriptObject::GetDoCommandCosts()
 {
-	return GetStorage()->costs.GetCost();
+	return GetStorage().costs.GetCost();
 }
 
 /* static */ void ScriptObject::SetLastError(ScriptErrorType last_error)
 {
-	GetStorage()->last_error = last_error;
+	GetStorage().last_error = last_error;
 }
 
 /* static */ ScriptErrorType ScriptObject::GetLastError()
 {
-	return GetStorage()->last_error;
+	return GetStorage().last_error;
 }
 
 /* static */ void ScriptObject::SetLastCost(Money last_cost)
 {
-	GetStorage()->last_cost = last_cost;
+	GetStorage().last_cost = last_cost;
 }
 
 /* static */ Money ScriptObject::GetLastCost()
 {
-	return GetStorage()->last_cost;
+	return GetStorage().last_cost;
 }
 
 /* static */ void ScriptObject::SetRoadType(RoadType road_type)
 {
-	GetStorage()->road_type = road_type;
+	GetStorage().road_type = road_type;
 }
 
 /* static */ RoadType ScriptObject::GetRoadType()
 {
-	return GetStorage()->road_type;
+	return GetStorage().road_type;
 }
 
 /* static */ void ScriptObject::SetRailType(RailType rail_type)
 {
-	GetStorage()->rail_type = rail_type;
+	GetStorage().rail_type = rail_type;
 }
 
 /* static */ RailType ScriptObject::GetRailType()
 {
-	return GetStorage()->rail_type;
+	return GetStorage().rail_type;
 }
 
 /* static */ void ScriptObject::SetLastCommandRes(bool res)
 {
-	GetStorage()->last_command_res = res;
+	GetStorage().last_command_res = res;
 }
 
 /* static */ bool ScriptObject::GetLastCommandRes()
 {
-	return GetStorage()->last_command_res;
+	return GetStorage().last_command_res;
 }
 
 /* static */ void ScriptObject::SetLastCommandResData(CommandDataBuffer data)
 {
-	GetStorage()->last_cmd_ret = std::move(data);
+	GetStorage().last_cmd_ret = std::move(data);
 }
 
 /* static */ const CommandDataBuffer &ScriptObject::GetLastCommandResData()
 {
-	return GetStorage()->last_cmd_ret;
+	return GetStorage().last_cmd_ret;
 }
 
 /* static */ void ScriptObject::SetCompany(::CompanyID company)
 {
-	if (GetStorage()->root_company == INVALID_OWNER) GetStorage()->root_company = company;
+	if (GetStorage().root_company == INVALID_OWNER) GetStorage().root_company = company;
-	GetStorage()->company = company;
+	GetStorage().company = company;
 
 	_current_company = company;
 }
 
 /* static */ ::CompanyID ScriptObject::GetCompany()
 {
-	return GetStorage()->company;
+	return GetStorage().company;
 }
 
 /* static */ ::CompanyID ScriptObject::GetRootCompany()
 {
-	return GetStorage()->root_company;
+	return GetStorage().root_company;
 }
 
 /* static */ bool ScriptObject::CanSuspend()
 {
 	Squirrel *squirrel = ScriptObject::GetActiveInstance().engine;
-	return GetStorage()->allow_do_command && squirrel->CanSuspend();
+	return GetStorage().allow_do_command && squirrel->CanSuspend();
 }
 
 /* static */ ScriptEventQueue &ScriptObject::GetEventQueue()
 {
-	return GetStorage()->event_queue;
+	return GetStorage().event_queue;
 }
 
 /* static */ ScriptLogTypes::LogData &ScriptObject::GetLogData()
 {
-	return GetStorage()->log_data;
+	return GetStorage().log_data;
 }
 
 /* static */ void ScriptObject::SetCallbackVariable(int index, int value)
 {
-	if (static_cast<size_t>(index) >= GetStorage()->callback_value.size()) GetStorage()->callback_value.resize(index + 1);
+	if (static_cast<size_t>(index) >= GetStorage().callback_value.size()) GetStorage().callback_value.resize(index + 1);
-	GetStorage()->callback_value[index] = value;
+	GetStorage().callback_value[index] = value;
 }
 
 /* static */ int ScriptObject::GetCallbackVariable(int index)
 {
-	return GetStorage()->callback_value[index];
+	return GetStorage().callback_value[index];
 }
 
 /* static */ CommandCallbackData *ScriptObject::GetDoCommandCallback()
@@ -310,8 +310,8 @@ ScriptObject::DisableDoCommandScope::DisableDoCommandScope()
 		IncreaseDoCommandCosts(res.GetCost());
 		if (!_generating_world) {
 			/* Charge a nominal fee for asynchronously executed commands */
-			Squirrel *engine = ScriptObject::GetActiveInstance().engine;
+			Squirrel &engine = *ScriptObject::GetActiveInstance().engine;
-			Squirrel::DecreaseOps(engine->GetVM(), 100);
+			Squirrel::DecreaseOps(engine.GetVM(), 100);
 		}
 		if (callback != nullptr) {
 			/* Insert return value into to stack and throw a control code that

src/script/script_instance.cpp

@@ -100,7 +100,7 @@ void ScriptInstance::Initialize(const std::string &main_script, const std::strin
 
 void ScriptInstance::RegisterAPI()
 {
-	squirrel_register_std(this->engine);
+	squirrel_register_std(*this->engine);
 }
 
 bool ScriptInstance::LoadCompatibilityScript(std::string_view api_version, Subdirectory dir)
@@ -318,9 +318,10 @@ void ScriptInstance::CollectGarbage()
 }
 
 
-ScriptStorage *ScriptInstance::GetStorage()
+ScriptStorage &ScriptInstance::GetStorage()
 {
-	return this->storage;
+	assert(this->storage != nullptr);
+	return *this->storage;
 }
 
 ScriptLogTypes::LogData &ScriptInstance::GetLogData()

src/script/script_instance.hpp

@@ -91,7 +91,7 @@ public:
 	/**
 	 * Get the storage of this script.
 	 */
-	class ScriptStorage *GetStorage();
+	class ScriptStorage &GetStorage();
 
 	/**
 	 * Get the log pointer of this script.
@@ -146,7 +146,11 @@ public:
 	/**
 	 * Get the controller attached to the instance.
 	 */
-	class ScriptController *GetController() { return controller; }
+	class ScriptController &GetController()
+	{
+		assert(this->controller != nullptr);
+		return *this->controller;
+	}
 
 	/**
 	 * Return the "this script died" value

src/script/squirrel.cpp

@@ -536,7 +536,7 @@ void Squirrel::Initialize()
 	sq_setforeignptr(this->vm, this);
 
 	sq_pushroottable(this->vm);
-	squirrel_register_global_std(this);
+	squirrel_register_global_std(*this);
 
 	/* Set consts table as delegate of root table, so consts/enums defined via require() are accessible */
 	sq_pushconsttable(this->vm);

src/script/squirrel_std.cpp

@@ -82,20 +82,20 @@ SQInteger SquirrelStd::notifyallexceptions(HSQUIRRELVM vm)
 	return SQ_ERROR;
 }
 
-void squirrel_register_global_std(Squirrel *engine)
+void squirrel_register_global_std(Squirrel &engine)
 {
 	/* We don't use squirrel_helper here, as we want to register to the global
 	 *  scope and not to a class. */
-	engine->AddMethod("require",             &SquirrelStd::require,             ".s");
+	engine.AddMethod("require",             &SquirrelStd::require,             ".s");
-	engine->AddMethod("notifyallexceptions", &SquirrelStd::notifyallexceptions, ".b");
+	engine.AddMethod("notifyallexceptions", &SquirrelStd::notifyallexceptions, ".b");
 }
 
-void squirrel_register_std(Squirrel *engine)
+void squirrel_register_std(Squirrel &engine)
 {
 	/* We don't use squirrel_helper here, as we want to register to the global
 	 *  scope and not to a class. */
-	engine->AddMethod("min", &SquirrelStd::min, ".ii");
+	engine.AddMethod("min", &SquirrelStd::min, ".ii");
-	engine->AddMethod("max", &SquirrelStd::max, ".ii");
+	engine.AddMethod("max", &SquirrelStd::max, ".ii");
 
-	sqstd_register_mathlib(engine->GetVM());
+	sqstd_register_mathlib(engine.GetVM());
 }

src/script/squirrel_std.hpp

@@ -52,12 +52,12 @@ public:
 /**
  * Register all standard functions we want to give to a script.
  */
-void squirrel_register_std(Squirrel *engine);
+void squirrel_register_std(Squirrel &engine);
 
 /**
  * Register all standard functions that are available on first startup.
  * @note this set is very limited, and is only meant to load other scripts and things like that.
  */
-void squirrel_register_global_std(Squirrel *engine);
+void squirrel_register_global_std(Squirrel &engine);
 
 #endif /* SQUIRREL_STD_HPP */

src/station_cmd.cpp

@@ -3331,7 +3331,7 @@ draw_default_foundation:
 			auto result = GetRoadStopLayout(ti, stopspec, st, type, view, regs100);
 			if (result.has_value()) {
 				if (stopspec->flags.Test(RoadStopSpecFlag::DrawModeRegister)) {
-					stop_draw_mode = static_cast<RoadStopDrawMode>(regs100[0]);
+					stop_draw_mode = static_cast<RoadStopDrawModes>(regs100[0]);
 				}
 				if (type == StationType::RoadWaypoint && stop_draw_mode.Test(RoadStopDrawMode::WaypGround)) {
 					draw_ground = true;

src/timetable_gui.cpp

@@ -427,6 +427,7 @@ struct TimetableWindow : Window {
 	void DrawTimetablePanel(const Rect &r) const
 	{
 		const Vehicle *v = this->vehicle;
+		if (v->GetNumOrders() == 0) return;
 		Rect tr = r.Shrink(WidgetDimensions::scaled.framerect);
 		int i = this->vscroll->GetPosition();
 		VehicleOrderID order_id = (i + 1) / 2;

src/widgets/error_widget.h

@@ -15,6 +15,8 @@ enum ErrorMessageWidgets : WidgetID {
 	WID_EM_CAPTION,  ///< Caption of the window.
 	WID_EM_FACE,     ///< Error title.
 	WID_EM_MESSAGE,  ///< Error message.
+	WID_EM_CLOSEBOX, ///< Close box button.
+	WID_EM_PANEL,    ///< Coloured background panel.
 };
 
 #endif /* WIDGETS_ERROR_WIDGET_H */