[nostalgia] Update release notes

Makefile

@@ -52,3 +52,25 @@ configure-gba:
 .PHONY: configure-gba-debug
 configure-gba-debug:
 	${BC_CMD_SETUP_BUILD} --toolchain=deps/gbabuildcore/cmake/modules/GBA.cmake --target=gba --current_build=0 --build_type=debug --build_root=${BC_VAR_BUILD_PATH}
+
+.PHONY: loc
+loc:
+	${BC_PY3} util/scripts/loc.py \
+		--search-dirs \
+			src \
+			deps/ox/src \
+			deps/buildcore \
+			deps/gbabuildcore \
+			deps/glutils \
+			deps/teagba \
+		--include-exts \
+			.cpp \
+			.hpp \
+			.py \
+			.s \
+			.cmake \
+		--exclude-paths \
+			deps/teagba/src/gba_crt0.s \
+			src/olympic/studio/applib/src/font.cpp \
+			src/olympic/studio/applib/src/font.hpp \
+			src/nostalgia/studio/icondata.cpp

deps/ox/src/ox/claw/write.hpp

@@ -39,7 +39,7 @@ struct TypeInfoCatcher {
 	}
 
 	constexpr Error field(...) noexcept {
-		return ox::Error(0);
+		return {};
 	}
 
 	static constexpr auto opType() {

deps/ox/src/ox/event/signal.hpp

@@ -218,7 +218,7 @@ Error Signal<Args...>::emitCheckError(Args... args) const noexcept {
 		for (auto &f : m_slots) {
 			f->call(args...);
 		}
-		return ox::Error(0);
+		return {};
 	} catch (const ox::Exception &ex) {
 		return ox::Error(ex.errCode, ex.msg, ex.src);
 	}
@@ -410,7 +410,7 @@ Error Signal<Error(Args...)>::emitCheckError(Args... args) const noexcept {
 	for (auto &f : m_slots) {
 		OX_RETURN_ERROR(f->call(ox::forward<Args>(args)...));
 	}
-	return ox::Error(0);
+	return {};
 }
 
 }

deps/ox/src/ox/fs/filestore/filestoretemplate.hpp

@@ -230,7 +230,7 @@ template<typename size_t>
 Error FileStoreTemplate<size_t>::incLinks(uint64_t id) {
 	OX_REQUIRE_M(item, find(static_cast<size_t>(id)).validate());
 	++item->links;
-	return ox::Error(0);
+	return {};
 }
 
 template<typename size_t>
@@ -240,7 +240,7 @@ Error FileStoreTemplate<size_t>::decLinks(uint64_t id) {
 	if (item->links == 0) {
 		OX_RETURN_ERROR(remove(item));
 	}
-	return ox::Error(0);
+	return {};
 }
 
 template<typename size_t>
@@ -298,7 +298,7 @@ Error FileStoreTemplate<size_t>::write(uint64_t id64, const void *data, FsSize_t
 						        dest->id.get(), dest.offset(), destData.size());
 						fsData->rootNode = dest.offset();
 						oxTracef("ox.fs.FileStoreTemplate.write", "Root inode: {}", dest->id.get());
-						return ox::Error(0);
+						return {};
 					}
 				} else {
 					oxTrace("ox.fs.FileStoreTemplate.write.fail", "Could not place item due to absence of FileStore header.");
@@ -427,7 +427,7 @@ Error FileStoreTemplate<size_t>::resize() {
 	oxTracef("ox.fs.FileStoreTemplate.resize", "resize to: {}", newSize);
 	OX_RETURN_ERROR(m_buffer->setSize(newSize));
 	oxTracef("ox.fs.FileStoreTemplate.resize", "resized to: {}", m_buffer->size());
-	return ox::Error(0);
+	return {};
 }
 
 template<typename size_t>
@@ -479,7 +479,7 @@ Error FileStoreTemplate<size_t>::walk(Error(*cb)(uint8_t, uint64_t, uint64_t)) {
 	for (auto i = m_buffer->iterator(); i.valid(); i.next()) {
 		OX_RETURN_ERROR(cb(i->fileType, i.ptr().offset(), i.ptr().end()));
 	}
-	return ox::Error(0);
+	return {};
 }
 
 template<typename size_t>
@@ -503,7 +503,7 @@ Error FileStoreTemplate<size_t>::compact() {
 	return m_buffer->compact([this, &isFirstItem](uint64_t oldAddr, ItemPtr item) -> Error {
 		if (isFirstItem) {
 			isFirstItem = false;
-			return ox::Error(0);
+			return {};
 		}
 		if (!item.valid()) {
 			return ox::Error(1);
@@ -524,7 +524,7 @@ Error FileStoreTemplate<size_t>::compact() {
 				parent->right = item;
 			}
 		}
-		return ox::Error(0);
+		return {};
 	});
 }
 
@@ -552,7 +552,7 @@ Error FileStoreTemplate<size_t>::placeItem(ItemPtr item) {
 		item->left = root->left;
 		item->right = root->right;
 		oxTracef("ox.fs.FileStoreTemplate.placeItem", "Overwrote Root Item: {}", item->id.get());
-		return ox::Error(0);
+		return {};
 	} else {
 		return placeItem(root, item);
 	}
@@ -573,7 +573,7 @@ Error FileStoreTemplate<size_t>::placeItem(ItemPtr root, ItemPtr item, int depth
 				item->right = right->right;
 			}
 			oxTracef("ox.fs.FileStoreTemplate.placeItem", "Placed Item: {}", item->id.get());
-			return ox::Error(0);
+			return {};
 		} else {
 			return placeItem(right, item, depth + 1);
 		}
@@ -586,7 +586,7 @@ Error FileStoreTemplate<size_t>::placeItem(ItemPtr root, ItemPtr item, int depth
 				item->right = left->right;
 			}
 			oxTracef("ox.fs.FileStoreTemplate.placeItem", "Placed Item: {}", item->id.get());
-			return ox::Error(0);
+			return {};
 		} else {
 			return placeItem(left, item, depth + 1);
 		}
@@ -624,7 +624,7 @@ Error FileStoreTemplate<size_t>::unplaceItem(ItemPtr item) {
 		} else {
 			fsData->rootNode = 0;
 		}
-		return ox::Error(0);
+		return {};
 	} else {
 		return unplaceItem(root, item);
 	}
@@ -661,7 +661,7 @@ Error FileStoreTemplate<size_t>::unplaceItem(ItemPtr root, ItemPtr item, int dep
 	if (item->left) {
 		OX_RETURN_ERROR(placeItem(m_buffer->ptr(item->left)));
 	}
-	return ox::Error(0);
+	return {};
 }
 
 template<typename size_t>
@@ -669,7 +669,7 @@ Error FileStoreTemplate<size_t>::remove(ItemPtr item) {
 	if (item.valid()) {
 		OX_RETURN_ERROR(unplaceItem(item));
 		OX_RETURN_ERROR(m_buffer->free(item));
-		return ox::Error(0);
+		return {};
 	}
 	return ox::Error(1);
 }

deps/ox/src/ox/fs/filesystem/filesystem.hpp

@@ -329,7 +329,7 @@ Error FileSystemTemplate<FileStore, Directory>::format(void *buff, uint64_t buff
 		return ox::Error(1);
 	}
 
-	return ox::Error(0);
+	return {};
 }
 
 template<typename FileStore, typename Directory>
@@ -346,7 +346,7 @@ Error FileSystemTemplate<FileStore, Directory>::move(StringViewCR src, StringVie
 	OX_REQUIRE_M(inode, rootDir.find(src));
 	OX_RETURN_ERROR(rootDir.write(dest, inode));
 	OX_RETURN_ERROR(rootDir.remove(src));
-	return ox::Error(0);
+	return {};
 }
 
 template<typename FileStore, typename Directory>
@@ -407,7 +407,7 @@ Error FileSystemTemplate<FileStore, Directory>::removePath(StringViewCR path, bo
 		oxTrace("FileSystemTemplate.remove.fail", "Tried to remove directory without recursive setting.");
 		return ox::Error(1);
 	}
-	return ox::Error(0);
+	return {};
 }
 
 template<typename FileStore, typename Directory>
@@ -424,7 +424,7 @@ Result<Vector<String>> FileSystemTemplate<FileStore, Directory>::ls(StringViewCR
 	Vector<String> out;
 	OX_RETURN_ERROR(ls(path, [&out](StringViewCR name, typename FileStore::InodeId_t) {
 		out.emplace_back(name);
-		return ox::Error(0);
+		return ox::Error{};
 	}));
 	return out;
 }

deps/ox/src/ox/fs/filesystem/passthroughfs.cpp

@@ -60,7 +60,7 @@ Error PassThroughFS::move(StringViewCR src, StringViewCR dest) noexcept {
 	if (ec.value()) {
 		return ox::Error(1);
 	}
-	return ox::Error(0);
+	return {};
 }
 
 Result<Vector<String>> PassThroughFS::ls(StringViewCR dir) const noexcept {
@@ -148,7 +148,7 @@ Error PassThroughFS::readFilePath(StringViewCR path, void *buffer, std::size_t b
 		oxTracef("ox.fs.PassThroughFS.read.error", "Read of {} failed: {}", path, f.what());
 		return ox::Error(2);
 	}
-	return ox::Error(0);
+	return {};
 }
 
 Error PassThroughFS::readFileInode(uint64_t, void*, std::size_t) noexcept {
@@ -197,7 +197,7 @@ Error PassThroughFS::writeFilePath(StringViewCR path, const void *buffer, uint64
 		oxTracef("ox.fs.PassThroughFS.read.error", "Write of {} failed: {}", path, f.what());
 		return ox::Error(1);
 	}
-	return ox::Error(0);
+	return {};
 }
 
 Error PassThroughFS::writeFileInode(uint64_t, const void*, uint64_t, FileType) noexcept {

deps/ox/src/ox/fs/filesystem/passthroughfs.hpp

@@ -99,7 +99,7 @@ Error PassThroughFS::ls(StringViewCR dir, F cb) const noexcept {
 	for (auto &p : di) {
 		OX_RETURN_ERROR(cb(p.path().filename().c_str(), 0));
 	}
-	return ox::Error(0);
+	return {};
 }
 
 }

deps/ox/src/ox/fs/filesystem/pathiterator.cpp

@@ -36,7 +36,7 @@ Error PathIterator::dirPath(char *out, std::size_t outSize) {
 	if (idx >= 0 && size < outSize) {
 		ox::memcpy(out, m_path, size);
 		out[size] = 0;
-		return ox::Error(0);
+		return {};
 	} else {
 		return ox::Error(1);
 	}
@@ -85,7 +85,7 @@ Error PathIterator::next(StringView &fileName) {
 	std::size_t size = 0;
 	auto retval = ox::Error(1);
 	if (m_iterator < m_maxSize && ox::strlen(&m_path[m_iterator])) {
-		retval = ox::Error(0);
+		retval = {};
 		if (m_path[m_iterator] == '/') {
 			m_iterator++;
 		}
@@ -118,7 +118,7 @@ Result<std::size_t> PathIterator::nextSize() const {
 	auto retval = ox::Error(1);
 	auto it = m_iterator;
 	if (it < m_maxSize && ox::strlen(&m_path[it])) {
-		retval = ox::Error(0);
+		retval = {};
 		if (m_path[it] == '/') {
 			it++;
 		}

deps/ox/src/ox/fs/ptrarith/nodebuffer.hpp

@@ -354,7 +354,7 @@ Error NodeBuffer<size_t, Item>::free(ItemPtr item) noexcept {
 		}
 	}
 	m_header.bytesUsed -= item.size();
-	return ox::Error(0);
+	return {};
 }
 
 template<typename size_t, typename Item>
@@ -370,7 +370,7 @@ Error NodeBuffer<size_t, Item>::setSize(std::size_t size) noexcept {
 		m_header.size = static_cast<size_t>(size);
 		auto data = reinterpret_cast<uint8_t*>(this) + end;
 		ox::memset(data, 0, size - end);
-		return ox::Error(0);
+		return {};
 	}
 }
 
@@ -422,7 +422,7 @@ Error NodeBuffer<size_t, Item>::compact(F cb) noexcept {
 		src = ptr(dest->next);
 		dest = uninitializedPtr(dest.offset() + dest->fullSize());
 	}
-	return ox::Error(0);
+	return {};
 }
 
 template<typename size_t, typename Item>

deps/ox/src/ox/fs/tool.cpp

@@ -48,7 +48,7 @@ static ox::Error runLs(ox::FileSystem *fs, ox::Span<const char*> args) noexcept
 	for (const auto &file : files) {
 		oxOutf("{}\n", file);
 	}
-	return ox::Error(0);
+	return {};
 }
 
 static ox::Error runRead(ox::FileSystem *fs, ox::Span<const char*> args) noexcept {
@@ -60,7 +60,7 @@ static ox::Error runRead(ox::FileSystem *fs, ox::Span<const char*> args) noexcep
 	OX_ALLOW_UNSAFE_BUFFERS_BEGIN
 	std::ignore = fwrite(buff.data(), sizeof(decltype(buff)::value_type), buff.size(), stdout);
 	OX_ALLOW_UNSAFE_BUFFERS_END
-	return ox::Error(0);
+	return {};
 }
 
 static ox::Error run(int argc, const char **argv) noexcept {

deps/ox/src/ox/logconn/logconn.cpp

@@ -91,23 +91,28 @@ ox::Error LoggerConn::sendInit(const InitTraceMsg &msg) noexcept {
 }
 
 void LoggerConn::msgSend() noexcept {
-	while (true) {
-		std::unique_lock lk(m_waitMut);
-		m_waitCond.wait(lk);
-		if (!m_running) {
-			break;
-		}
-		std::lock_guard const buffLk(m_buffMut);
+	try {
 		while (true) {
-			Array<char, units::KB> tmp;
-			const auto read = m_buff.read(tmp.data(), tmp.size());
-			if (!read) {
+			std::unique_lock lk(m_waitMut);
+			m_waitCond.wait(lk);
+			if (!m_running) {
 				break;
 			}
-			oxAssert(read <= tmp.size(), "logger trying to read too much data");
-			//std::printf("LoggerConn: sending %lu bytes\n", read);
-			std::ignore = send(tmp.data(), read);
+			std::lock_guard const buffLk(m_buffMut);
+			while (true) {
+				Array<char, units::KB> tmp;
+				const auto read = m_buff.read(tmp.data(), tmp.size());
+				if (!read) {
+					break;
+				}
+				oxAssert(read <= tmp.size(), "logger trying to read too much data");
+				//std::printf("LoggerConn: sending %lu bytes\n", read);
+				std::ignore = send(tmp.data(), read);
+			}
 		}
+	} catch (std::exception const &e) {
+		oxErrf("Exception in logger thread: {}\n", e.what());
+		oxAssert(false, "logger thread exception");
 	}
 }
 

deps/ox/src/ox/mc/read.hpp

@@ -197,7 +197,7 @@ constexpr Error MetalClawReaderTemplate<Reader>::field(const char*, bool *val) n
 		OX_RETURN_ERROR(result);
 	}
 	++m_field;
-	return ox::Error(0);
+	return {};
 }
 
 // array handler
@@ -256,7 +256,7 @@ constexpr Error MetalClawReaderTemplate<Reader>::field(const char*, HashMap<Stri
 		}
 	}
 	++m_field;
-	return ox::Error(0);
+	return {};
 }
 
 template<Reader_c Reader>
@@ -330,7 +330,7 @@ constexpr Error MetalClawReaderTemplate<Reader>::field(const char*, BasicString<
 		}
 	}
 	++m_field;
-	return ox::Error(0);
+	return {};
 }
 
 template<Reader_c Reader>
@@ -370,7 +370,7 @@ constexpr Error MetalClawReaderTemplate<Reader>::fieldCString(const char*, char
 		data[size] = 0;
 	}
 	++m_field;
-	return ox::Error(0);
+	return {};
 }
 
 template<Reader_c Reader>
@@ -388,7 +388,7 @@ constexpr Error MetalClawReaderTemplate<Reader>::fieldCString(const char*, char
 		data[size] = 0;
 	}
 	++m_field;
-	return ox::Error(0);
+	return {};
 }
 
 template<Reader_c Reader>
@@ -416,7 +416,7 @@ constexpr Error MetalClawReaderTemplate<Reader>::fieldCString(const char*, char
 		}
 	}
 	++m_field;
-	return ox::Error(0);
+	return {};
 }
 
 template<Reader_c Reader>
@@ -464,7 +464,7 @@ constexpr Error MetalClawReaderTemplate<Reader>::readInteger(I *val) noexcept {
 		}
 	}
 	++m_field;
-	return ox::Error(0);
+	return {};
 }
 
 template<Reader_c Reader>
@@ -487,7 +487,7 @@ constexpr Error MetalClawReaderTemplate<Reader>::field(const char*, CB cb) noexc
 		}
 	}
 	++m_field;
-	return ox::Error(0);
+	return {};
 }
 
 template<Reader_c Reader>

deps/ox/src/ox/mc/write.hpp

@@ -122,7 +122,7 @@ class MetalClawWriter {
 			}
 			OX_RETURN_ERROR(m_fieldPresence.set(static_cast<std::size_t>(m_field), fieldSet));
 			++m_field;
-			return ox::Error(0);
+			return {};
 		}
 
 };
@@ -184,7 +184,7 @@ constexpr Error MetalClawWriter<Writer>::field(const char*, const bool *val) noe
 		OX_RETURN_ERROR(m_fieldPresence.set(static_cast<std::size_t>(m_field), *val));
 	}
 	++m_field;
-	return ox::Error(0);
+	return {};
 }
 
 template<Writer_c Writer>
@@ -201,7 +201,7 @@ constexpr Error MetalClawWriter<Writer>::field(const char*, const BasicString<Sm
 	}
 	OX_RETURN_ERROR(m_fieldPresence.set(static_cast<std::size_t>(m_field), fieldSet));
 	++m_field;
-	return ox::Error(0);
+	return {};
 }
 
 template<Writer_c Writer>
@@ -229,7 +229,7 @@ constexpr Error MetalClawWriter<Writer>::fieldCString(const char*, const char *c
 	}
 	OX_RETURN_ERROR(m_fieldPresence.set(static_cast<std::size_t>(m_field), fieldSet));
 	++m_field;
-	return ox::Error(0);
+	return {};
 }
 
 template<Writer_c Writer>
@@ -255,7 +255,7 @@ constexpr Error MetalClawWriter<Writer>::fieldCString(const char*, const char *v
 	}
 	OX_RETURN_ERROR(m_fieldPresence.set(static_cast<std::size_t>(m_field), fieldSet));
 	++m_field;
-	return ox::Error(0);
+	return {};
 }
 
 template<Writer_c Writer>
@@ -319,7 +319,7 @@ OX_ALLOW_UNSAFE_BUFFERS_END
 	}
 	OX_RETURN_ERROR(m_fieldPresence.set(static_cast<std::size_t>(m_field), fieldSet));
 	++m_field;
-	return ox::Error(0);
+	return {};
 }
 
 template<Writer_c Writer>
@@ -356,7 +356,7 @@ constexpr Error MetalClawWriter<Writer>::field(const char*, const HashMap<String
 	}
 	OX_RETURN_ERROR(m_fieldPresence.set(static_cast<std::size_t>(m_field), fieldSet));
 	++m_field;
-	return ox::Error(0);
+	return {};
 }
 
 template<Writer_c Writer>

deps/ox/src/ox/model/def.hpp

@@ -13,7 +13,7 @@
 // oxModelFwdDecl is necessary because Apple-Clang is broken...
 #define OX_MODEL_FWD_DECL(modelName) constexpr ox::Error model(auto *io, ox::CommonPtrWith<modelName> auto *o) noexcept
 #define OX_MODEL_BEGIN(modelName) constexpr ox::Error model(auto *io, [[maybe_unused]] ox::CommonPtrWith<modelName> auto *o) noexcept { OX_RETURN_ERROR(io->template setTypeInfo<modelName>());
-#define OX_MODEL_END() return ox::Error(0); }
+#define OX_MODEL_END() return {}; }
 #define OX_MODEL_FIELD(fieldName) OX_RETURN_ERROR(io->field(#fieldName, &o->fieldName));
 #define OX_MODEL_FIELD_RENAME(objFieldName, serFieldName) OX_RETURN_ERROR(io->field(#serFieldName, &o->objFieldName));
 #define OX_MODEL_FRIEND(modelName) friend constexpr ox::Error model(auto *io, ox::CommonPtrWith<modelName> auto *o) noexcept

deps/ox/src/ox/model/desctypes.hpp

@@ -244,7 +244,7 @@ constexpr Error model(TypeDescReader<T> *io, CommonPtrWith<DescriptorField> auto
 	// defaultValue is unused now, but placeholder for backwards compatibility
 	int defaultValue = 0;
 	oxReturnError(io->field("defaultValue", &defaultValue));
-	return ox::Error(0);
+	return {};
 }
 #endif
 

deps/ox/src/ox/model/descwrite.hpp

@@ -205,7 +205,7 @@ constexpr Error TypeDescWriter::field(StringViewCR name, T const*, std::size_t,
 		const auto t = type(p);
 		oxAssert(t != nullptr, "field(const char *name, T *val, std::size_t): Type not found or generated");
 		m_type->fieldList.emplace_back(t, String(name), detail::indirectionLevels_v<T> + 1, subscriptStack, buildTypeId(*t));
-		return ox::Error(0);
+		return {};
 	}
 	return ox::Error(1);
 }
@@ -220,7 +220,7 @@ constexpr Error TypeDescWriter::field(StringViewCR name, T const*, std::size_t)
 		auto const lvls = detail::indirectionLevels_v<T> + 1;
 		SubscriptStack subscriptStack{lvls};
 		m_type->fieldList.emplace_back(t, String(name), lvls, subscriptStack, buildTypeId(*t));
-		return ox::Error(0);
+		return {};
 	}
 	return ox::Error(1);
 }
@@ -231,7 +231,7 @@ constexpr Error TypeDescWriter::field(StringViewCR name, UnionView<T, force> val
 		const auto t = type(val);
 		oxAssert(t != nullptr, "field(const char *name, T val): Type not found or generated");
 		m_type->fieldList.emplace_back(t, String(name), 0, SubscriptStack{}, ox::String(t->typeName));
-		return ox::Error(0);
+		return {};
 	}
 	return ox::Error(1);
 }

deps/ox/src/ox/model/fieldcounter.hpp

@@ -31,25 +31,25 @@ class FieldCounter {
 		template<typename U>
 		constexpr ox::Error field(StringViewCR, U) noexcept {
 			++fields;
-			return ox::Error(0);
+			return {};
 		}
 
 		template<typename U>
 		constexpr ox::Error field(StringViewCR, U, std::size_t) noexcept {
 			++fields;
-			return ox::Error(0);
+			return {};
 		}
 
 		template<typename U, typename Handler>
 		constexpr Error field(StringViewCR, Handler) {
 			++fields;
-			return ox::Error(0);
+			return {};
 		}
 
 		template<typename ...Args>
 		constexpr Error fieldCString(Args&&...) noexcept {
 			++fields;
-			return ox::Error(0);
+			return {};
 		}
 
 		static constexpr auto opType() noexcept {

deps/ox/src/ox/model/modelops.hpp

@@ -56,19 +56,19 @@ class MemberList {
 		template<typename T>
 		constexpr Error field(const char*, T *v) noexcept {
 			vars[m_i++] = static_cast<void*>(v);
-			return ox::Error(0);
+			return {};
 		}
 
 		template<typename T>
 		constexpr Error field(const char*, T *v, int) noexcept {
 			vars[m_i++] = static_cast<void*>(v);
-			return ox::Error(0);
+			return {};
 		}
 
 		template<typename U, bool force = false>
 		constexpr Error field(const char*, UnionView<U, force> u) noexcept {
 			vars[m_i++] = static_cast<void*>(u.get());
-			return ox::Error(0);
+			return {};
 		}
 
 		template<typename T>
@@ -107,7 +107,7 @@ class Copier {
 				auto &dst = *cbit_cast<FT*>(m_dst->vars[m_i]);
 				dst = src;
 				++m_i;
-				return ox::Error(0);
+				return {};
 			}
 		}
 
@@ -119,7 +119,7 @@ class Copier {
 				dst = src;
 			}
 			++m_i;
-			return ox::Error(0);
+			return {};
 		}
 
 		template<typename U, bool force = false>
@@ -128,7 +128,7 @@ class Copier {
 			auto &src = *u.get();
 			dst = src;
 			++m_i;
-			return ox::Error(0);
+			return {};
 		}
 
 		template<typename T = void>
@@ -168,7 +168,7 @@ class Mover {
 				dst = std::move(src);
 				src = FT{};
 				++m_i;
-				return ox::Error(0);
+				return {};
 			}
 		}
 
@@ -181,7 +181,7 @@ class Mover {
 				src = FT{};
 			}
 			++m_i;
-			return ox::Error(0);
+			return {};
 		}
 
 		template<typename U, bool force = false>
@@ -190,7 +190,7 @@ class Mover {
 			auto &src = *u.get();
 			dst = std::move(src);
 			++m_i;
-			return ox::Error(0);
+			return {};
 		}
 
 		template<typename T = void>
@@ -228,7 +228,7 @@ class Equals {
 			const auto &dst = std::bit_cast<FT>(*m_other->vars[m_i]);
 			++m_i;
 			if (dst == src) {
-				return ox::Error(0);
+				return {};
 			} else {
 				this->value = false;
 				return ox::Error(1);
@@ -246,7 +246,7 @@ class Equals {
 				}
 			}
 			++m_i;
-			return ox::Error(0);
+			return {};
 		}
 
 		template<typename U, bool force = false>
@@ -255,7 +255,7 @@ class Equals {
 			const auto &src = *u.get();
 			++m_i;
 			if (dst == src) {
-				return ox::Error(0);
+				return {};
 			} else {
 				this->value = false;
 				return ox::Error(1);

deps/ox/src/ox/model/modelvalue.cpp

@@ -18,6 +18,6 @@ static_assert([]() -> ox::Error {
 	}
 	//oxReturnError(v.set<int32_t>(5));
 	return {};
-}() == ox::Error(0));
+}() == ox::Error{});
 
 }

deps/ox/src/ox/model/modelvalue.hpp

@@ -972,7 +972,7 @@ constexpr Error model(auto *h, CommonPtrWith<ModelObject> auto *obj) noexcept {
 	for (auto &f : obj->m_fieldsOrder) {
 		OX_RETURN_ERROR(h->field(f->name.c_str(), &f->value));
 	}
-	return ox::Error(0);
+	return {};
 }
 
 constexpr Error model(auto *h, CommonPtrWith<ModelUnion> auto *obj) noexcept {
@@ -981,7 +981,7 @@ constexpr Error model(auto *h, CommonPtrWith<ModelUnion> auto *obj) noexcept {
 	for (auto &f : obj->m_fieldsOrder) {
 		OX_RETURN_ERROR(h->field(f->name.c_str(), &f->value));
 	}
-	return ox::Error(0);
+	return {};
 }
 
 constexpr ModelValue::ModelValue(const ModelValue &other) noexcept {
@@ -1129,7 +1129,7 @@ constexpr Error ModelValue::setType(
 		OX_RETURN_ERROR(m_data.uni->setType(type));
 	}
 	oxAssert(m_type != Type::Undefined, "No type set");
-	return ox::Error(0);
+	return {};
 }
 
 template<typename T>
@@ -1184,7 +1184,7 @@ constexpr Error ModelValue::set(const T &v) noexcept {
 		safeDelete(&value);
 	}
 	value = v;
-	return ox::Error(0);
+	return {};
 }
 
 template<typename T>
@@ -1199,7 +1199,7 @@ constexpr Error ModelValue::set(T &&v) noexcept {
 		safeDelete(&value);
 	}
 	value = std::move(v);
-	return ox::Error(0);
+	return {};
 }
 
 constexpr ModelValue &ModelValue::operator=(ModelValue &other) noexcept {

deps/ox/src/ox/model/typenamecatcher.hpp

@@ -38,17 +38,17 @@ struct TypeNameCatcher {
 
 	template<typename T>
 	constexpr Error field(const char*, T*, std::size_t) noexcept {
-		return ox::Error(0);
+		return {};
 	}
 
 	template<typename T>
 	constexpr Error field(const char*, T) noexcept {
-		return ox::Error(0);
+		return {};
 	}
 
 	template<typename ...Args>
 	constexpr Error fieldCString(Args&&...) noexcept {
-		return ox::Error(0);
+		return {};
 	}
 
 	static constexpr auto opType() noexcept {
@@ -77,17 +77,17 @@ struct TypeInfoCatcher {
 
 	template<typename T>
 	constexpr Error field(const char*, T*, std::size_t) noexcept {
-		return ox::Error(0);
+		return {};
 	}
 
 	template<typename T>
 	constexpr Error field(const char*, T) noexcept {
-		return ox::Error(0);
+		return {};
 	}
 
 	template<typename T>
 	constexpr Error fieldCString(const char*, T) noexcept {
-		return ox::Error(0);
+		return {};
 	}
 
 	static constexpr auto opType() noexcept {

deps/ox/src/ox/model/walk.hpp

@@ -127,7 +127,7 @@ static constexpr Error parseField(const DescriptorField &field, Reader *rdr, Dat
 		}
 	}
 	walker->popNamePath();
-	return ox::Error(0);
+	return {};
 }
 
 template<typename Reader, typename FH>
@@ -141,7 +141,7 @@ constexpr Error model(Reader *rdr, DataWalker<Reader, FH> *walker) noexcept {
 	for (const auto &field : fields) {
 		OX_RETURN_ERROR(parseField(field, rdr, walker));
 	}
-	return ox::Error(0);
+	return {};
 }
 
 template<typename Reader, typename Handler>

deps/ox/src/ox/oc/read.cpp

@@ -37,7 +37,7 @@ OrganicClawReader::OrganicClawReader(Json::Value json, int unionIdx) noexcept:
 }
 
 Error OrganicClawReader::field(const char *key, bool *val) noexcept {
-	auto err = ox::Error(0);
+	ox::Error err{};
 	if (targetValid()) {
 		const auto &jv = value(key);
 		if (jv.empty()) {
@@ -53,7 +53,7 @@ Error OrganicClawReader::field(const char *key, bool *val) noexcept {
 }
 
 Error OrganicClawReader::fieldCString(const char *key, char *val, std::size_t buffLen) noexcept {
-	auto err = ox::Error(0);
+	ox::Error err{};
 	const char *begin = nullptr, *end = nullptr;
 	const auto &jv = value(key);
 	if (targetValid()) {
@@ -81,7 +81,7 @@ Error OrganicClawReader::fieldCString(const char *key, char *val, std::size_t bu
 }
 
 Error OrganicClawReader::fieldCString(const char *key, char **val) noexcept {
-	auto err = ox::Error(0);
+	ox::Error err{};
 	const char *begin = nullptr, *end = nullptr;
 	const auto &jv = value(key);
 	auto &data = *val;
@@ -106,7 +106,7 @@ Error OrganicClawReader::fieldCString(const char *key, char **val) noexcept {
 }
 
 Error OrganicClawReader::fieldCString(const char *key, char **val, std::size_t buffLen) noexcept {
-	auto err = ox::Error(0);
+	ox::Error err{};
 	const char *begin = nullptr, *end = nullptr;
 	const auto &jv = value(key);
 	if (targetValid()) {

deps/ox/src/ox/oc/read.hpp

@@ -137,7 +137,7 @@ class OrganicClawReader {
 
 template<typename T>
 Error OrganicClawReader::field(const char *key, T *val) noexcept {
-	auto err = ox::Error(0);
+	ox::Error err{};
 	try {
 		if constexpr (is_integer_v<T>) {
 			if (targetValid()) {
@@ -190,7 +190,7 @@ Error OrganicClawReader::field(const char *key, T *val) noexcept {
 
 template<typename U, bool force>
 Error OrganicClawReader::field(const char *key, UnionView<U, force> val) noexcept {
-	auto err = ox::Error(0);
+	ox::Error err{};
 	if (targetValid()) {
 		const auto &jv = value(key);
 		if (jv.empty() || jv.isObject()) {
@@ -207,7 +207,7 @@ Error OrganicClawReader::field(const char *key, UnionView<U, force> val) noexcep
 
 template<std::size_t L>
 Error OrganicClawReader::field(const char *key, BasicString<L> *val) noexcept {
-	auto err = ox::Error(0);
+	ox::Error err{};
 	if (targetValid()) {
 		const auto &jv = value(key);
 		if (jv.empty()) {
@@ -224,7 +224,7 @@ Error OrganicClawReader::field(const char *key, BasicString<L> *val) noexcept {
 
 template<std::size_t L>
 Error OrganicClawReader::field(const char *key, IString<L> *val) noexcept {
-	auto err = ox::Error(0);
+	ox::Error err{};
 	if (targetValid()) {
 		const auto &jv = value(key);
 		if (jv.empty()) {
@@ -257,7 +257,7 @@ OX_ALLOW_UNSAFE_BUFFERS_BEGIN
 		OX_RETURN_ERROR(handler.field("", &val[i]));
 OX_ALLOW_UNSAFE_BUFFERS_END
 	}
-	return ox::Error(0);
+	return {};
 }
 
 template<typename T>
@@ -274,7 +274,7 @@ Error OrganicClawReader::field(const char *key, HashMap<String, T> *val) noexcep
 		const auto k = keys[i].c_str();
 		OX_RETURN_ERROR(handler.field(k, &val->operator[](k)));
 	}
-	return ox::Error(0);
+	return {};
 }
 
 Error readOC(BufferView buff, auto &val) noexcept {

deps/ox/src/ox/oc/write.cpp

@@ -23,7 +23,7 @@ Error OrganicClawWriter::fieldCString(const char *key, const char *const*val, in
 		value(key) = *val;
 	}
 	++m_fieldIt;
-	return ox::Error(0);
+	return {};
 }
 
 Error OrganicClawWriter::fieldCString(const char *key, const char *const*val) noexcept {

deps/ox/src/ox/oc/write.hpp

@@ -46,7 +46,7 @@ class OrganicClawWriter {
 				value(key) = *val;
 			}
 			++m_fieldIt;
-			return ox::Error(0);
+			return {};
 		}
 
 		Error field(const char *key, const int16_t *val) noexcept {
@@ -54,7 +54,7 @@ class OrganicClawWriter {
 				value(key) = *val;
 			}
 			++m_fieldIt;
-			return ox::Error(0);
+			return {};
 		}
 
 		Error field(const char *key, const int32_t *val) noexcept {
@@ -62,7 +62,7 @@ class OrganicClawWriter {
 				value(key) = *val;
 			}
 			++m_fieldIt;
-			return ox::Error(0);
+			return {};
 		}
 
 		Error field(const char *key, const int64_t *val) noexcept {
@@ -70,7 +70,7 @@ class OrganicClawWriter {
 				value(key) = *val;
 			}
 			++m_fieldIt;
-			return ox::Error(0);
+			return {};
 		}
 
 
@@ -79,7 +79,7 @@ class OrganicClawWriter {
 				value(key) = *val;
 			}
 			++m_fieldIt;
-			return ox::Error(0);
+			return {};
 		}
 
 		Error field(const char *key, const uint16_t *val) noexcept {
@@ -87,7 +87,7 @@ class OrganicClawWriter {
 				value(key) = *val;
 			}
 			++m_fieldIt;
-			return ox::Error(0);
+			return {};
 		}
 
 		Error field(const char *key, const uint32_t *val) noexcept {
@@ -95,7 +95,7 @@ class OrganicClawWriter {
 				value(key) = *val;
 			}
 			++m_fieldIt;
-			return ox::Error(0);
+			return {};
 		}
 
 		Error field(const char *key, const uint64_t *val) noexcept {
@@ -103,7 +103,7 @@ class OrganicClawWriter {
 				value(key) = *val;
 			}
 			++m_fieldIt;
-			return ox::Error(0);
+			return {};
 		}
 
 		Error field(char const*key, bool const*val) noexcept {
@@ -151,7 +151,7 @@ class OrganicClawWriter {
 				value(key) = val->c_str();
 			}
 			++m_fieldIt;
-			return ox::Error(0);
+			return {};
 		}
 
 		Error fieldCString(const char*, const char *const*val, int len) noexcept;
@@ -211,7 +211,7 @@ OX_ALLOW_UNSAFE_BUFFERS_END
 		value(key) = w.m_json;
 	}
 	++m_fieldIt;
-	return ox::Error(0);
+	return {};
 }
 
 template<typename T>
@@ -237,7 +237,7 @@ Error OrganicClawWriter::field(const char *key, const T *val) noexcept {
 		}
 	}
 	++m_fieldIt;
-	return ox::Error(0);
+	return {};
 }
 
 template<typename U, bool force>
@@ -251,7 +251,7 @@ Error OrganicClawWriter::field(const char *key, UnionView<U, force> val) noexcep
 		}
 	}
 	++m_fieldIt;
-	return ox::Error(0);
+	return {};
 }
 
 Result<ox::Buffer> writeOC(const auto &val) noexcept {

deps/ox/src/ox/std/string.hpp

@@ -182,7 +182,7 @@ class BasicString {
 			// make sure last element is a null terminator
 			m_buff[currentLen + strLen] = 0;
 			// this can't fail, but it returns an Error to match BString::append
-			return ox::Error(0);
+			return {};
 		}
 
 		constexpr Error append(ox::StringView sv) noexcept {

deps/ox/src/ox/std/stringview.hpp

@@ -104,13 +104,16 @@ constexpr ox::Result<int> strToInt(StringViewCR str) noexcept {
 	OX_ALLOW_UNSAFE_BUFFERS_BEGIN
 	int total = 0;
 	int multiplier = 1;
+	if (str.len() == 0) [[unlikely]] {
+		return Error{1, "Empty string passed to strToInt"};
+	}
 	for (auto i = static_cast<int64_t>(str.len()) - 1; i != -1; --i) {
 		auto s = static_cast<std::size_t>(i);
 		if (str[s] >= '0' && str[s] <= '9') {
 			total += (str[s] - '0') * multiplier;
 			multiplier *= 10;
 		} else {
-			return ox::Error(1);
+			return ox::Error{1};
 		}
 	}
 	return total;

deps/ox/src/ox/std/vector.hpp

@@ -311,7 +311,7 @@ class Vector: detail::VectorAllocator<T, Allocator, SmallVectorSize> {
 		 */
 		constexpr Error unordered_erase(std::size_t pos) noexcept(useNoexcept);
 
-		constexpr Error remove(T const &val);
+		constexpr Error remove(MaybeView_t<T> const &val);
 
 		constexpr void reserve(std::size_t cap) noexcept(useNoexcept);
 
@@ -658,11 +658,11 @@ constexpr Error Vector<T, SmallVectorSize, Allocator>::unordered_erase(std::size
 	--m_size;
 	m_items[pos] = std::move(m_items[m_size]);
 	m_items[m_size].~T();
-	return ox::Error(0);
+	return {};
 }
 
 template<typename T, std::size_t SmallVectorSize, typename Allocator>
-constexpr ox::Error Vector<T, SmallVectorSize, Allocator>::remove(T const &val) {
+constexpr ox::Error Vector<T, SmallVectorSize, Allocator>::remove(MaybeView_t<T> const &val) {
 	for (size_t i{}; auto const &v : *this) {
 		if (v == val) {
 			return erase(i).error;

release-notes.md

@@ -1,6 +1,19 @@
 # d2025.06.0
 
+* Add ability to remember recent projects in config
+* Add navigation support (back and forward)
+* Fix file deletion to close file even if not active
+* Fix file copy to work when creating a copy with the name of a previously
+  deleted file
+* Fix crash that could occur after switching projects
+* Make file picker popup accept on double click of a file
+* TileSheetEditor: Fix copy/cut/paste enablement when there is no selection
+* TileSheetEditor: Fix manual redo of draw actions, fix drawing to pixel 0, 0
+  as first action
+* TileSheetEditor: Fix draw command to work on same pixel after switching
+  subsheets
 * PaletteEditor: Add RGB key shortcuts for focusing color channels
+* PaletteEditor: Add color preview to color editor
 
 # d2025.05.1
 

src/nostalgia/modules/gfx/include/nostalgia/gfx/color.hpp

@@ -142,9 +142,9 @@ constexpr Color16 color16(int r, int g, int b, int a = 0) noexcept {
 [[nodiscard]]
 constexpr Color16 color16(uint8_t r, uint8_t g, uint8_t b, uint8_t a = 0) noexcept {
 	return static_cast<Color16>(ox::min<uint8_t>(r, 31))
-	     | static_cast<Color16>(ox::min<uint8_t>(g, 31) << 5)
-	     | static_cast<Color16>(ox::min<uint8_t>(b, 31) << 10)
-        | static_cast<Color16>(a << 15);
+		| static_cast<Color16>(ox::min<uint8_t>(g, 31) << 5)
+		| static_cast<Color16>(ox::min<uint8_t>(b, 31) << 10)
+		| static_cast<Color16>(a << 15);
 }
 
 static_assert(color16(0, 31, 0) == 992);

src/nostalgia/modules/gfx/src/gfx-gba.cpp

@@ -350,7 +350,7 @@ void panic(const char *file, int line, const char *panicMsg, ox::Error const&err
 	const auto heapEnd = reinterpret_cast<char*>(MEM_EWRAM_BEGIN + heapSz);
 	ox::heapmgr::initHeap(heapBegin, heapEnd);
 	OX_ALLOW_UNSAFE_BUFFERS_END
-		auto tctx = turbine::init(keel::loadRomFs("").unwrap(), "Nostalgia").unwrap();
+	auto tctx = turbine::init(keel::loadRomFs("").unwrap(), "Nostalgia").unwrap();
 	auto ctx = init(*tctx).unwrap();
 	std::ignore = initGfx();
 	std::ignore = initConsole(*ctx);

src/nostalgia/modules/gfx/src/studio/paletteeditor/commands/removepagecommand.cpp

@@ -8,7 +8,7 @@
 
 namespace nostalgia::gfx {
 
-RemovePageCommand::RemovePageCommand(Palette &pal, size_t idx) noexcept:
+RemovePageCommand::RemovePageCommand(Palette &pal, size_t const idx) noexcept:
 	m_pal(pal),
 	m_idx(idx) {}
 

src/nostalgia/modules/gfx/src/studio/paletteeditor/commands/updatecolorcommand.cpp

@@ -9,13 +9,13 @@ namespace nostalgia::gfx {
 
 UpdateColorCommand::UpdateColorCommand(
 	Palette &pal,
-	size_t page,
-	size_t idx,
-	Color16 newColor):
-		m_pal(pal),
-		m_page(page),
-		m_idx(idx),
-		m_altColor(newColor) {
+	size_t const page,
+	size_t const idx,
+	Color16 const newColor):
+		m_pal{pal},
+		m_page{page},
+		m_idx{idx},
+		m_altColor{newColor} {
 	if (color(m_pal, m_page, m_idx) == newColor) {
 		throw studio::NoChangesException();
 	}

src/nostalgia/modules/gfx/src/studio/paletteeditor/paletteeditor-imgui.cpp

@@ -302,29 +302,43 @@ void PaletteEditorImGui::drawColorEditor() noexcept {
 	int const a = alpha16(c);
 	auto const newName = ig::InputText<50>(
 			"Name", m_pal.colorNames[m_selectedColorRow]);
-	bool inputFocused = ImGui::IsItemFocused();
+	auto const nameInputFocused = ImGui::IsItemFocused();
 	ImGui::Separator();
-	colorInput("Red", r, inputFocused, FocusCmd::Red);
-	colorInput("Green", g, inputFocused, FocusCmd::Green);
-	colorInput("Blue", b, inputFocused, FocusCmd::Blue);
+	bool colorInFocused{};
+	colorInput("Red", r, colorInFocused, FocusCmd::Red);
+	colorInput("Green", g, colorInFocused, FocusCmd::Green);
+	colorInput("Blue", b, colorInFocused, FocusCmd::Blue);
+	// color preview
+	{
+		ImGui::PushStyleColor(
+			ImGuiCol_ChildBg,
+			color32(color16(r, g, b)) | 0xff'00'00'00);
+		ImGui::BeginChild("ColorPreview", {0, 25});
+		ImGui::EndChild();
+		ImGui::PopStyleColor();
+	}
 	if (ig::PushButton("Apply to all pages", {-1, ig::BtnSz.y})) {
 		std::ignore = pushCommand<ApplyColorAllPagesCommand>(
 				m_pal, m_page, m_selectedColorRow);
 	}
-	if (ig::mainWinHasFocus() && !inputFocused && !ImGui::IsKeyDown(ImGuiKey_ModCtrl)) {
+	if (ig::mainWinHasFocus() && !ImGui::IsKeyDown(ImGuiKey_ModCtrl)) {
 		if (!ImGui::IsKeyDown(ImGuiKey_ModAlt)) {
-			numShortcuts(m_selectedColorRow, largestPage(m_pal));
+			if (!nameInputFocused && !colorInFocused) {
+				numShortcuts(m_selectedColorRow, largestPage(m_pal));
+			}
 		} else {
 			numShortcuts(m_page, m_pal.pages.size());
 		}
-		if (ImGui::IsKeyDown(ImGuiKey_R)) {
-			m_focusCmd = FocusCmd::Red;
-		}
-		if (ImGui::IsKeyDown(ImGuiKey_G)) {
-			m_focusCmd = FocusCmd::Green;
-		}
-		if (ImGui::IsKeyDown(ImGuiKey_B)) {
-			m_focusCmd = FocusCmd::Blue;
+		if (!nameInputFocused) {
+			if (ImGui::IsKeyDown(ImGuiKey_R)) {
+				m_focusCmd = FocusCmd::Red;
+			}
+			if (ImGui::IsKeyDown(ImGuiKey_G)) {
+				m_focusCmd = FocusCmd::Green;
+			}
+			if (ImGui::IsKeyDown(ImGuiKey_B)) {
+				m_focusCmd = FocusCmd::Blue;
+			}
 		}
 	}
 	auto const newColor = color16(r, g, b, a);

src/nostalgia/modules/gfx/src/studio/tilesheeteditor/commands/addsubsheetcommand.cpp

@@ -13,7 +13,7 @@ AddSubSheetCommand::AddSubSheetCommand(
 	auto &parent = getSubSheet(m_img, m_parentIdx);
 	if (!parent.subsheets.empty()) {
 		auto idx = m_parentIdx;
-		idx.emplace_back(parent.subsheets.size());
+		idx.emplace_back(static_cast<uint32_t>(parent.subsheets.size()));
 		m_addedSheets.push_back(idx);
 	} else {
 		auto idx = m_parentIdx;

src/nostalgia/modules/gfx/src/studio/tilesheeteditor/commands/deletetilescommand.cpp

@@ -13,20 +13,19 @@ DeleteTilesCommand::DeleteTilesCommand(
 		TileSheet::SubSheetIdx idx,
 		std::size_t const tileIdx,
 		std::size_t const tileCnt) noexcept:
-		m_img(img),
-		m_idx(std::move(idx)) {
-	constexpr unsigned bytesPerTile = PixelsPerTile;
-	m_deletePos = tileIdx * bytesPerTile;
-	m_deleteSz = tileCnt * bytesPerTile;
-	m_deletedPixels.resize(m_deleteSz);
-	// copy pixels to be erased
-	{
-		auto &s = getSubSheet(m_img, m_idx);
-		auto dst = m_deletedPixels.begin();
-		auto src = s.pixels.begin() + m_deletePos;
-		ox::copy_n(src, m_deleteSz, dst);
-	}
-}
+		m_img{img},
+		m_idx{std::move(idx)},
+		m_deletePos{tileIdx * PixelsPerTile},
+		m_deleteSz{tileCnt * PixelsPerTile},
+		m_deletedPixels{[this] {
+			ox::Vector<uint8_t> deletedPixels(m_deleteSz);
+			// copy pixels to be erased
+			auto const &s = getSubSheet(m_img, m_idx);
+			auto const dst = deletedPixels.begin();
+			auto const src = s.pixels.begin() + m_deletePos;
+			ox::copy_n(src, m_deleteSz, dst);
+			return deletedPixels;
+		}()} {}
 
 ox::Error DeleteTilesCommand::redo() noexcept {
 	auto &s = getSubSheet(m_img, m_idx);

src/nostalgia/modules/gfx/src/studio/tilesheeteditor/commands/deletetilescommand.hpp

@@ -11,10 +11,10 @@ namespace nostalgia::gfx {
 class DeleteTilesCommand: public TileSheetCommand {
 	private:
 		TileSheet &m_img;
-		TileSheet::SubSheetIdx m_idx;
-		std::size_t m_deletePos = 0;
-		std::size_t m_deleteSz = 0;
-		ox::Vector<uint8_t> m_deletedPixels = {};
+		TileSheet::SubSheetIdx const m_idx;
+		std::size_t const m_deletePos = 0;
+		std::size_t const m_deleteSz = 0;
+		ox::Vector<uint8_t> const m_deletedPixels;
 
 	public:
 		DeleteTilesCommand(

src/nostalgia/modules/gfx/src/studio/tilesheeteditor/commands/drawcommand.cpp

@@ -62,11 +62,11 @@ constexpr void iterateLine(ox::Point const &a, ox::Point const &b, auto const &f
 DrawCommand::DrawCommand(
 		TileSheet &img,
 		TileSheet::SubSheetIdx subSheetIdx,
-		std::size_t idx,
+		std::size_t const idx,
 		int const palIdx) noexcept:
-		m_img(img),
-		m_subSheetIdx(std::move(subSheetIdx)),
-		m_palIdx(palIdx) {
+		m_img{img},
+		m_subSheetIdx{std::move(subSheetIdx)},
+		m_palIdx{palIdx} {
 	auto &subsheet = getSubSheet(m_img, m_subSheetIdx);
 	m_changes.emplace_back(static_cast<uint32_t>(idx), getPixel(subsheet, idx));
 }

src/nostalgia/modules/gfx/src/studio/tilesheeteditor/commands/inserttilescommand.cpp

@@ -12,19 +12,19 @@ InsertTilesCommand::InsertTilesCommand(
 		std::size_t const tileIdx,
 		std::size_t const tileCnt) noexcept:
 		m_img{img},
-		m_idx{std::move(idx)} {
-	m_insertPos = tileIdx * PixelsPerTile;
-	m_insertCnt = tileCnt * PixelsPerTile;
-	m_deletedPixels.resize(m_insertCnt);
-	// copy pixels to be erased
-	{
-		auto &s = getSubSheet(m_img, m_idx);
-		auto &p = s.pixels;
-		auto const dst = m_deletedPixels.begin();
-		auto const src = p.begin() + p.size() - m_insertCnt;
-		ox::copy_n(src, m_insertCnt, dst);
-	}
-}
+		m_idx{std::move(idx)},
+		m_insertPos{tileIdx * PixelsPerTile},
+		m_insertCnt{tileCnt * PixelsPerTile},
+		m_insertedPixels{[this] {
+			ox::Vector<uint8_t> insertedPixels(m_insertCnt);
+			// copy pixels to be erased
+			auto &s = getSubSheet(m_img, m_idx);
+			auto &p = s.pixels;
+			auto const dst = insertedPixels.begin();
+			auto const src = p.begin() + p.size() - m_insertCnt;
+			ox::copy_n(src, m_insertCnt, dst);
+			return insertedPixels;
+		}()} {}
 
 OX_ALLOW_UNSAFE_BUFFERS_BEGIN
 
@@ -52,7 +52,7 @@ ox::Error InsertTilesCommand::undo() noexcept {
 		auto const src = &p[srcIdx];
 		ox::memmove(dst1, src, sz);
 	}
-	ox::memcpy(dst2, m_deletedPixels.data(), m_deletedPixels.size());
+	ox::memcpy(dst2, m_insertedPixels.data(), m_insertedPixels.size());
 	return {};
 }
 

src/nostalgia/modules/gfx/src/studio/tilesheeteditor/commands/inserttilescommand.hpp

@@ -11,10 +11,10 @@ namespace nostalgia::gfx {
 class InsertTilesCommand: public TileSheetCommand {
 	private:
 		TileSheet &m_img;
-		TileSheet::SubSheetIdx m_idx;
-		std::size_t m_insertPos = 0;
-		std::size_t m_insertCnt = 0;
-		ox::Vector<uint8_t> m_deletedPixels = {};
+		TileSheet::SubSheetIdx const m_idx;
+		std::size_t const m_insertPos{};
+		std::size_t const m_insertCnt{};
+		ox::Vector<uint8_t> const m_insertedPixels;
 
 	public:
 		InsertTilesCommand(

src/nostalgia/modules/gfx/src/studio/tilesheeteditor/commands/updatesubsheetcommand.cpp

@@ -15,7 +15,6 @@ UpdateSubSheetCommand::UpdateSubSheetCommand(
 		m_img{img},
 		m_idx{std::move(idx)},
 		m_sheet{getSubSheet(m_img, m_idx)} {
-	m_sheet = getSubSheet(m_img, m_idx);
 	m_sheet.name = std::move(name);
 	OX_THROW_ERROR(resizeSubsheet(m_sheet, {cols, rows}));
 }

src/nostalgia/modules/gfx/src/studio/tilesheeteditor/commands/updatesubsheetcommand.hpp

@@ -11,7 +11,7 @@ namespace nostalgia::gfx {
 class UpdateSubSheetCommand: public TileSheetCommand {
 	private:
 		TileSheet &m_img;
-		TileSheet::SubSheetIdx m_idx;
+		TileSheet::SubSheetIdx const m_idx;
 		TileSheet::SubSheet m_sheet;
 
 	public:

src/nostalgia/modules/gfx/src/studio/tilesheeteditor/tilesheeteditor-imgui.cpp

@@ -36,7 +36,7 @@ OX_MODEL_BEGIN(TileSheetEditorConfig)
 OX_MODEL_END()
 
 static ox::Vector<uint32_t> normalizePixelSizes(
-		ox::Vector<uint8_t> const&inPixels) noexcept {
+		ox::Vector<uint8_t> const &inPixels) noexcept {
 	ox::Vector<uint32_t> outPixels;
 	outPixels.reserve(inPixels.size());
 	outPixels.resize(inPixels.size());
@@ -47,7 +47,7 @@ static ox::Vector<uint32_t> normalizePixelSizes(
 }
 
 static ox::Vector<uint32_t> normalizePixelArrangement(
-		ox::Vector<uint32_t> const&inPixels,
+		ox::Vector<uint32_t> const &inPixels,
 		int const cols,
 		int const scale) {
 	auto const scalePt = ox::Point{scale, scale};
@@ -67,10 +67,10 @@ static ox::Vector<uint32_t> normalizePixelArrangement(
 }
 
 static ox::Error toPngFile(
-		ox::CStringView const&path,
+		ox::CStringViewCR path,
 		ox::Vector<uint32_t> &&pixels,
-		Palette const&pal,
-		size_t page,
+		Palette const &pal,
+		size_t const page,
 		unsigned const width,
 		unsigned const height) noexcept {
 	for (auto &c : pixels) {
@@ -88,7 +88,7 @@ static ox::Error toPngFile(
 }
 
 TileSheetEditorImGui::TileSheetEditorImGui(studio::Context &sctx, ox::StringParam path):
-		Editor(sctx, std::move(path)),
+		Editor{sctx, std::move(path)},
 		m_sctx{sctx},
 		m_tctx{m_sctx.tctx},
 		m_palPicker{"Palette Chooser", keelCtx(sctx), FileExt_npal},
@@ -98,8 +98,11 @@ TileSheetEditorImGui::TileSheetEditorImGui(studio::Context &sctx, ox::StringPara
 	m_subsheetEditor.inputSubmitted.connect(this, &TileSheetEditorImGui::updateActiveSubsheet);
 	m_exportMenu.inputSubmitted.connect(this, &TileSheetEditorImGui::exportSubsheetToPng);
 	// load config
-	auto const&config = studio::readConfig<TileSheetEditorConfig>(
-			keelCtx(m_sctx), itemPath());
+	auto &kctx = keelCtx(m_sctx);
+	auto const ip = itemPath();
+	oxLogError(studio::headerizeConfigFile<TileSheetEditorConfig>(kctx, ip));
+	auto const &config =
+		studio::readConfig<TileSheetEditorConfig>(kctx, ip);
 	if (config.ok()) {
 		m_model.setActiveSubsheet(validateSubSheetIdx(m_model.img(), config.value.activeSubsheet));
 	}
@@ -189,10 +192,13 @@ void TileSheetEditorImGui::keyStateChanged(turbine::Key const key, bool const do
 }
 
 void TileSheetEditorImGui::draw(studio::Context&) noexcept {
+	setCopyEnabled(m_model.hasSelection());
+	setCutEnabled(m_model.hasSelection());
+	setPasteEnabled(m_model.hasSelection());
 	if (ig::mainWinHasFocus() && m_tool == TileSheetTool::Select) {
 		if (ImGui::IsKeyDown(ImGuiKey_ModCtrl) && !m_palPathFocused) {
 			if (ImGui::IsKeyPressed(ImGuiKey_A)) {
-				auto const&img = m_model.activeSubSheet();
+				auto const &img = m_model.activeSubSheet();
 				m_model.setSelection({{}, {img.columns * TileWidth - 1, img.rows * TileHeight - 1}});
 			} else if (ImGui::IsKeyPressed(ImGuiKey_G)) {
 				m_model.clearSelection();
@@ -271,14 +277,14 @@ void TileSheetEditorImGui::draw(studio::Context&) noexcept {
 			auto constexpr btnSize = ImVec2{btnHeight, btnHeight};
 			if (ig::PushButton("+", btnSize)) {
 				auto insertOnIdx = m_model.activeSubSheetIdx();
-				auto const&parent = m_model.activeSubSheet();
+				auto const &parent = m_model.activeSubSheet();
 				m_model.addSubsheet(insertOnIdx);
-				insertOnIdx.emplace_back(parent.subsheets.size() - 1);
+				insertOnIdx.emplace_back(static_cast<uint32_t>(parent.subsheets.size() - 1));
 				setActiveSubsheet(insertOnIdx);
 			}
 			ImGui::SameLine();
 			if (ig::PushButton("-", btnSize)) {
-				auto const&activeSubsheetIdx = m_model.activeSubSheetIdx();
+				auto const &activeSubsheetIdx = m_model.activeSubSheetIdx();
 				if (!activeSubsheetIdx.empty()) {
 					m_model.rmSubsheet(activeSubsheetIdx);
 				}
@@ -378,7 +384,7 @@ void TileSheetEditorImGui::drawSubsheetSelector(
 }
 
 [[nodiscard]]
-ox::Vec2 TileSheetEditorImGui::clickPos(ImVec2 const&winPos, ox::Vec2 clickPos) noexcept {
+ox::Vec2 TileSheetEditorImGui::clickPos(ImVec2 const &winPos, ox::Vec2 clickPos) noexcept {
 	clickPos.x -= winPos.x + 10;
 	clickPos.y -= winPos.y + 10;
 	return clickPos;
@@ -400,7 +406,7 @@ void TileSheetEditorImGui::navigateTo(ox::StringViewCR arg) noexcept {
 }
 
 void TileSheetEditorImGui::showSubsheetEditor() noexcept {
-	auto const&sheet = m_model.activeSubSheet();
+	auto const &sheet = m_model.activeSubSheet();
 	if (!sheet.subsheets.empty()) {
 		m_subsheetEditor.show(sheet.name, -1, -1);
 	} else {
@@ -411,8 +417,8 @@ void TileSheetEditorImGui::showSubsheetEditor() noexcept {
 ox::Error TileSheetEditorImGui::exportSubsheetToPng(int const scale) const noexcept {
 	OX_REQUIRE(path, studio::saveFile({{"PNG", "png"}}));
 	// subsheet to png
-	auto const&s = m_model.activeSubSheet();
-	auto const&pal = m_model.pal();
+	auto const &s = m_model.activeSubSheet();
+	auto const &pal = m_model.pal();
 	auto const width = s.columns * TileWidth;
 	auto const height = s.rows * TileHeight;
 	auto pixels = normalizePixelSizes(s.pixels);
@@ -430,7 +436,7 @@ ox::Error TileSheetEditorImGui::exportSubsheetToPng(int const scale) const noexc
 	return err;
 }
 
-void TileSheetEditorImGui::drawTileSheet(ox::Vec2 const&fbSize) noexcept {
+void TileSheetEditorImGui::drawTileSheet(ox::Vec2 const &fbSize) noexcept {
 	auto const winPos = ImGui::GetWindowPos();
 	auto const fbSizei = ox::Size{static_cast<int>(fbSize.x), static_cast<int>(fbSize.y)};
 	if (m_framebuffer.width != fbSizei.width || m_framebuffer.height != fbSizei.height) {
@@ -451,7 +457,7 @@ void TileSheetEditorImGui::drawTileSheet(ox::Vec2 const&fbSize) noexcept {
 		{0, 1},
 		{1, 0});
 	// handle input, this must come after drawing
-	auto const&io = ImGui::GetIO();
+	auto const &io = ImGui::GetIO();
 	auto const mousePos = ox::Vec2{ImGui::GetMousePos()};
 	if (ImGui::IsItemHovered()) {
 		auto const wheel = io.MouseWheel;
@@ -556,9 +562,9 @@ void TileSheetEditorImGui::drawPaletteMenu() noexcept {
 		ImGui::TableSetupColumn("Color16", 0, 3);
 		ImGui::TableHeadersRow();
 		{
-			auto const&pal = m_model.pal();
+			auto const &pal = m_model.pal();
 			if (pal.pages.size() > m_model.palettePage()) {
-				for (auto i = 0u; auto const&c: pal.pages[m_model.palettePage()].colors) {
+				for (auto i = 0u; auto const &c: pal.pages[m_model.palettePage()].colors) {
 					ImGui::TableNextRow();
 					ImGui::PushID(static_cast<int>(i));
 					// Column: color idx
@@ -580,7 +586,7 @@ void TileSheetEditorImGui::drawPaletteMenu() noexcept {
 					auto const ic = ImGui::GetColorU32({redf(c), greenf(c), bluef(c), 1});
 					ImGui::TableSetBgColor(ImGuiTableBgTarget_CellBg, ic);
 					ImGui::TableNextColumn();
-					auto const&name =  i < pal.colorNames.size() ? pal.colorNames[i].c_str() : "";
+					auto const &name =  i < pal.colorNames.size() ? pal.colorNames[i].c_str() : "";
 					ImGui::Text("%s", name);
 					ImGui::TableNextColumn();
 					ImGui::Text("(%02d, %02d, %02d)", red16(c), green16(c), blue16(c));
@@ -594,7 +600,7 @@ void TileSheetEditorImGui::drawPaletteMenu() noexcept {
 }
 
 ox::Error TileSheetEditorImGui::updateActiveSubsheet(
-		ox::StringView const&name, int const cols, int const rows) noexcept {
+		ox::StringViewCR name, int const cols, int const rows) noexcept {
 	return m_model.updateSubsheet(m_model.activeSubSheetIdx(), name, cols, rows);
 }
 

src/nostalgia/modules/gfx/src/studio/tilesheeteditor/tilesheeteditor-imgui.hpp

@@ -82,7 +82,7 @@ class TileSheetEditorImGui: public studio::Editor {
 		void drawSubsheetSelector(TileSheet::SubSheet&, TileSheet::SubSheetIdx &path);
 
 		[[nodiscard]]
-		static ox::Vec2 clickPos(ImVec2 const&winPos, ox::Vec2 clickPos) noexcept;
+		static ox::Vec2 clickPos(ImVec2 const &winPos, ox::Vec2 clickPos) noexcept;
 
 	protected:
 		ox::Error saveItem() noexcept override;
@@ -94,11 +94,11 @@ class TileSheetEditorImGui: public studio::Editor {
 
 		ox::Error exportSubsheetToPng(int scale) const noexcept;
 
-		void drawTileSheet(ox::Vec2 const&fbSize) noexcept;
+		void drawTileSheet(ox::Vec2 const &fbSize) noexcept;
 
 		void drawPaletteMenu() noexcept;
 
-		ox::Error updateActiveSubsheet(ox::StringView const&name, int cols, int rows) noexcept;
+		ox::Error updateActiveSubsheet(ox::StringViewCR name, int cols, int rows) noexcept;
 
 		void setActiveSubsheet(TileSheet::SubSheetIdx path) noexcept;
 

src/nostalgia/modules/gfx/src/studio/tilesheeteditor/tilesheeteditormodel.cpp

@@ -84,9 +84,9 @@ void TileSheetEditorModel::cut() {
 	auto const pt1 = m_selection->a;
 	auto const pt2 = ox::Point{s.columns * TileWidth, s.rows * TileHeight};
 	turbine::setClipboardObject(m_tctx, std::move(cb));
-	if (auto const cmd = ox::makeCatch<CutPasteCommand>(
+	if (auto cmd = ox::make_unique_catch<CutPasteCommand>(
 		CommandId::Cut, m_img, m_activeSubsSheetIdx, pt1, pt2, blankCb); cmd.ok()) {
-		std::ignore = pushCommand(cmd.value);
+		std::ignore = pushCommand(std::move(cmd.value));
 	}
 }
 
@@ -125,9 +125,9 @@ void TileSheetEditorModel::paste() {
 	auto const&s = activeSubSheet();
 	auto const pt1 = m_selection->a;
 	auto const pt2 = ox::Point{s.columns * TileWidth, s.rows * TileHeight};
-	if (auto const cmd = ox::makeCatch<CutPasteCommand>(
-		CommandId::Paste, m_img, m_activeSubsSheetIdx, pt1, pt2, *cb); cmd.ok()) {
-		std::ignore = pushCommand(cmd.value);
+	if (auto cmd = ox::make_unique_catch<CutPasteCommand>(
+		CommandId::Paste, m_img, m_activeSubsSheetIdx, pt1, pt2, *cb); cmd.value) {
+		std::ignore = pushCommand(std::move(cmd.value));
 	}
 }
 
@@ -142,7 +142,7 @@ ox::String const &TileSheetEditorModel::palPath() const & noexcept {
 
 ox::Error TileSheetEditorModel::setPalette(ox::StringViewCR path) noexcept {
 	OX_REQUIRE(uuid, keelCtx(m_tctx).pathToUuid.at(path));
-	std::ignore = pushCommand(ox::make<PaletteChangeCommand>(
+	std::ignore = pushCommand(ox::make_unique<PaletteChangeCommand>(
 		activeSubSheetIdx(), m_img, uuid->toString()));
 	return {};
 }
@@ -169,7 +169,7 @@ void TileSheetEditorModel::drawCommand(ox::Point const &pt, std::size_t const pa
 	if (m_ongoingDrawCommand) {
 		m_updated = m_updated || m_ongoingDrawCommand->append(idx);
 	} else if (activeSubSheet.pixels[idx] != palIdx) {
-		std::ignore = pushCommand(ox::make<DrawCommand>(
+		std::ignore = pushCommand(ox::make_unique<DrawCommand>(
 			m_img, m_activeSubsSheetIdx, idx, static_cast<int>(palIdx)));
 	}
 }
@@ -188,7 +188,7 @@ void TileSheetEditorModel::drawLineCommand(ox::Point const &pt, std::size_t cons
 		m_ongoingDrawCommand->lineUpdate(m_lineStartPt, pt);
 		m_updated = true;
 	} else {
-		std::ignore = pushCommand(ox::make<DrawCommand>(
+		std::ignore = pushCommand(ox::make_unique<DrawCommand>(
 			m_img, m_activeSubsSheetIdx, idx, static_cast<int>(palIdx)));
 		m_lineStartPt = pt;
 	}
@@ -198,41 +198,43 @@ void TileSheetEditorModel::endDrawCommand() noexcept {
 	if (m_ongoingDrawCommand) {
 		m_ongoingDrawCommand->finish();
 		m_ongoingDrawCommand = nullptr;
+		m_lastDrawUpdatePt = {-1, -1};
 	}
 }
 
-void TileSheetEditorModel::addSubsheet(TileSheet::SubSheetIdx const&parentIdx) noexcept {
-	std::ignore = pushCommand(ox::make<AddSubSheetCommand>(m_img, parentIdx));
+void TileSheetEditorModel::addSubsheet(TileSheet::SubSheetIdx const &parentIdx) noexcept {
+	std::ignore = pushCommand(ox::make_unique<AddSubSheetCommand>(m_img, parentIdx));
 }
 
-void TileSheetEditorModel::rmSubsheet(TileSheet::SubSheetIdx const&idx) noexcept {
-	std::ignore = pushCommand(ox::make<RmSubSheetCommand>(m_img, idx));
+void TileSheetEditorModel::rmSubsheet(TileSheet::SubSheetIdx const &idx) noexcept {
+	std::ignore = pushCommand(ox::make_unique<RmSubSheetCommand>(m_img, idx));
 }
 
 void TileSheetEditorModel::insertTiles(
-	TileSheet::SubSheetIdx const&idx, std::size_t const tileIdx, std::size_t const tileCnt) noexcept {
-	std::ignore = pushCommand(ox::make<InsertTilesCommand>(m_img, idx, tileIdx, tileCnt));
+	TileSheet::SubSheetIdx const &idx, std::size_t const tileIdx, std::size_t const tileCnt) noexcept {
+	std::ignore = pushCommand(ox::make_unique<InsertTilesCommand>(m_img, idx, tileIdx, tileCnt));
 }
 
 void TileSheetEditorModel::deleteTiles(
-	TileSheet::SubSheetIdx const&idx, std::size_t const tileIdx, std::size_t const tileCnt) noexcept {
-	std::ignore = pushCommand(ox::make<DeleteTilesCommand>(m_img, idx, tileIdx, tileCnt));
+	TileSheet::SubSheetIdx const &idx, std::size_t const tileIdx, std::size_t const tileCnt) noexcept {
+	std::ignore = pushCommand(ox::make_unique<DeleteTilesCommand>(m_img, idx, tileIdx, tileCnt));
 }
 
 ox::Error TileSheetEditorModel::updateSubsheet(
-	TileSheet::SubSheetIdx const&idx, ox::StringViewCR name, int const cols, int const rows) noexcept {
-	OX_REQUIRE(cmd, ox::makeCatch<UpdateSubSheetCommand>(m_img, idx, name, cols, rows));
-	std::ignore = pushCommand(cmd);
+	TileSheet::SubSheetIdx const &idx, ox::StringViewCR name, int const cols, int const rows) noexcept {
+	OX_REQUIRE_M(cmd, ox::make_unique_catch<UpdateSubSheetCommand>(m_img, idx, name, cols, rows));
+	std::ignore = pushCommand(std::move(cmd));
 	return {};
 }
 
-void TileSheetEditorModel::setActiveSubsheet(TileSheet::SubSheetIdx const&idx) noexcept {
+void TileSheetEditorModel::setActiveSubsheet(TileSheet::SubSheetIdx const &idx) noexcept {
 	m_activeSubsSheetIdx = idx;
 	this->activeSubsheetChanged.emit(m_activeSubsSheetIdx);
 	clearSelection();
+	m_lastDrawUpdatePt = {-1, -1};
 }
 
-void TileSheetEditorModel::fill(ox::Point const&pt, int const palIdx) noexcept {
+void TileSheetEditorModel::fill(ox::Point const &pt, uint8_t const palIdx) noexcept {
 	auto const&activeSubSheet = getSubSheet(m_img, m_activeSubsSheetIdx);
 	// build idx list
 	if (pt.x >= activeSubSheet.columns * TileWidth || pt.y >= activeSubSheet.rows * TileHeight) {
@@ -253,33 +255,33 @@ void TileSheetEditorModel::fill(ox::Point const&pt, int const palIdx) noexcept {
 	if (m_ongoingDrawCommand) {
 		m_updated = m_updated || m_ongoingDrawCommand->append(idxList);
 	} else if (getPixel(activeSubSheet, pt) != palIdx) {
-		std::ignore = pushCommand(ox::make<DrawCommand>(m_img, m_activeSubsSheetIdx, idxList, palIdx));
+		std::ignore = pushCommand(ox::make_unique<DrawCommand>(m_img, m_activeSubsSheetIdx, idxList, palIdx));
 	}
 }
 
 ox::Error TileSheetEditorModel::rotateLeft() noexcept {
-	auto &ss = activeSubSheet();
+	auto const &ss = activeSubSheet();
     ox::Point pt1, pt2{ss.columns * TileWidth - 1, ss.rows * TileHeight - 1};
 	if (m_selection) {
 		pt1 = m_selection->a;
 		pt2 = m_selection->b;
 	}
-	return pushCommand(ox::make<RotateCommand>(
+	return pushCommand(ox::make_unique<RotateCommand>(
 		m_img, m_activeSubsSheetIdx, pt1, pt2, RotateCommand::Direction::Left));
 }
 
 ox::Error TileSheetEditorModel::rotateRight() noexcept {
-	auto &ss = activeSubSheet();
+	auto const &ss = activeSubSheet();
     ox::Point pt1, pt2{ss.columns * TileWidth - 1, ss.rows * TileHeight - 1};
 	if (m_selection) {
 		pt1 = m_selection->a;
 		pt2 = m_selection->b;
 	}
-	return pushCommand(ox::make<RotateCommand>(
+	return pushCommand(ox::make_unique<RotateCommand>(
 		m_img, m_activeSubsSheetIdx, pt1, pt2, RotateCommand::Direction::Right));
 }
 
-void TileSheetEditorModel::setSelection(studio::Selection const&sel) noexcept {
+void TileSheetEditorModel::setSelection(studio::Selection const &sel) noexcept {
 	auto const &ss = activeSubSheet();
 	if (sel.a.x < ss.columns * TileWidth && sel.a.y < ss.rows * TileHeight) {
 		m_selection.emplace(sel);
@@ -290,7 +292,7 @@ void TileSheetEditorModel::setSelection(studio::Selection const&sel) noexcept {
 	m_updated = true;
 }
 
-void TileSheetEditorModel::select(ox::Point const&pt) noexcept {
+void TileSheetEditorModel::select(ox::Point const &pt) noexcept {
 	if (m_selTracker.updateCursorPoint(pt)) {
 		setSelection(m_selTracker.selection());
 	}
@@ -313,11 +315,15 @@ void TileSheetEditorModel::clearSelection() noexcept {
 	m_selection.reset();
 }
 
+bool TileSheetEditorModel::hasSelection() const noexcept {
+	return m_selection.has_value();
+}
+
 bool TileSheetEditorModel::updated() const noexcept {
 	return m_updated;
 }
 
-ox::Error TileSheetEditorModel::markUpdatedCmdId(studio::UndoCommand const*cmd) noexcept {
+ox::Error TileSheetEditorModel::markUpdatedCmdId(studio::UndoCommand const *cmd) noexcept {
 	m_updated = true;
 	auto const cmdId = cmd->commandId();
 	if (static_cast<CommandId>(cmdId) == CommandId::PaletteChange) {
@@ -363,7 +369,7 @@ ox::Error TileSheetEditorModel::flipX() noexcept {
 		a = m_selection->a;
 		b = m_selection->b;
 	}
-	return pushCommand(ox::make<FlipXCommand>(m_img, m_activeSubsSheetIdx, a, b));
+	return pushCommand(ox::make_unique<FlipXCommand>(m_img, m_activeSubsSheetIdx, a, b));
 }
 
 ox::Error TileSheetEditorModel::flipY() noexcept {
@@ -374,7 +380,7 @@ ox::Error TileSheetEditorModel::flipY() noexcept {
 		a = m_selection->a;
 		b = m_selection->b;
 	}
-	return pushCommand(ox::make<FlipYCommand>(m_img, m_activeSubsSheetIdx, a, b));
+	return pushCommand(ox::make_unique<FlipYCommand>(m_img, m_activeSubsSheetIdx, a, b));
 }
 
 bool TileSheetEditorModel::rotateEligible() const noexcept {
@@ -388,14 +394,14 @@ bool TileSheetEditorModel::rotateEligible() const noexcept {
 }
 
 ox::Error TileSheetEditorModel::moveSubSheet(TileSheet::SubSheetIdx src, TileSheet::SubSheetIdx dst) noexcept {
-	return pushCommand(ox::make<MoveSubSheetCommand>(m_img, std::move(src), std::move(dst)));
+	return pushCommand(ox::make_unique<MoveSubSheetCommand>(m_img, std::move(src), std::move(dst)));
 }
 
 void TileSheetEditorModel::getFillPixels(
 		TileSheet::SubSheet const&activeSubSheet,
-		ox::Span<bool> pixels,
-		ox::Point const&pt,
-		int const oldColor) const noexcept {
+		ox::Span<bool> const pixels,
+		ox::Point const &pt,
+		uint8_t const oldColor) noexcept {
 	auto const idx = ptToIdx(pt, activeSubSheet.columns);
 	auto const relIdx = idx % PixelsPerTile;
 	if (pixels[relIdx] || activeSubSheet.pixels[idx] != oldColor) {
@@ -435,9 +441,9 @@ void TileSheetEditorModel::setPalPath() noexcept {
 	}
 }
 
-ox::Error TileSheetEditorModel::pushCommand(studio::UndoCommand *cmd) noexcept {
-	std::ignore = m_undoStack.push(ox::UPtr{cmd});
-	m_ongoingDrawCommand = dynamic_cast<DrawCommand*>(cmd);
+ox::Error TileSheetEditorModel::pushCommand(ox::UPtr<studio::UndoCommand> &&cmd) noexcept {
+	m_ongoingDrawCommand = dynamic_cast<DrawCommand*>(cmd.get());
+	std::ignore = m_undoStack.push(std::move(cmd));
 	m_updated = true;
 	return {};
 }

src/nostalgia/modules/gfx/src/studio/tilesheeteditor/tilesheeteditormodel.hpp

@@ -14,7 +14,7 @@
 
 namespace nostalgia::gfx {
 
-class TileSheetEditorModel: public ox::SignalHandler {
+class TileSheetEditorModel final: public ox::SignalHandler {
 
 	public:
 		ox::Signal<ox::Error(const TileSheet::SubSheetIdx&)> activeSubsheetChanged;
@@ -35,7 +35,7 @@ class TileSheetEditorModel: public ox::SignalHandler {
 		studio::SelectionTracker m_selTracker;
 		ox::Optional<studio::Selection> m_selection;
 		ox::Point m_lineStartPt;
-		ox::Point m_lastDrawUpdatePt;
+		ox::Point m_lastDrawUpdatePt{-1, -1};
 		bool m_updated = false;
 
 	public:
@@ -53,13 +53,13 @@ class TileSheetEditorModel: public ox::SignalHandler {
 		bool acceptsClipboardPayload() const noexcept;
 
 		[[nodiscard]]
-		constexpr TileSheet const&img() const noexcept;
+		constexpr TileSheet const &img() const noexcept;
 
 		[[nodiscard]]
 		constexpr TileSheet &img() noexcept;
 
 		[[nodiscard]]
-		constexpr Palette const&pal() const noexcept;
+		constexpr Palette const &pal() const noexcept;
 
 		[[nodiscard]]
 		ox::String const &palPath() const & noexcept;
@@ -71,26 +71,26 @@ class TileSheetEditorModel: public ox::SignalHandler {
 		[[nodiscard]]
 		size_t palettePage() const noexcept;
 
-		void drawCommand(ox::Point const&pt, std::size_t palIdx) noexcept;
+		void drawCommand(ox::Point const &pt, std::size_t palIdx) noexcept;
 
-		void drawLineCommand(ox::Point const&pt, std::size_t palIdx) noexcept;
+		void drawLineCommand(ox::Point const &pt, std::size_t palIdx) noexcept;
 
 		void endDrawCommand() noexcept;
 
-		void addSubsheet(TileSheet::SubSheetIdx const&parentIdx) noexcept;
+		void addSubsheet(TileSheet::SubSheetIdx const &parentIdx) noexcept;
 
-		void rmSubsheet(TileSheet::SubSheetIdx const&idx) noexcept;
+		void rmSubsheet(TileSheet::SubSheetIdx const &idx) noexcept;
 
-		void insertTiles(TileSheet::SubSheetIdx const&idx, std::size_t tileIdx, std::size_t tileCnt) noexcept;
+		void insertTiles(TileSheet::SubSheetIdx const &idx, std::size_t tileIdx, std::size_t tileCnt) noexcept;
 
-		void deleteTiles(TileSheet::SubSheetIdx const&idx, std::size_t tileIdx, std::size_t tileCnt) noexcept;
+		void deleteTiles(TileSheet::SubSheetIdx const &idx, std::size_t tileIdx, std::size_t tileCnt) noexcept;
 
-		ox::Error updateSubsheet(TileSheet::SubSheetIdx const&idx, ox::StringView const&name, int cols, int rows) noexcept;
+		ox::Error updateSubsheet(TileSheet::SubSheetIdx const &idx, ox::StringView const &name, int cols, int rows) noexcept;
 
-		void setActiveSubsheet(TileSheet::SubSheetIdx const&) noexcept;
+		void setActiveSubsheet(TileSheet::SubSheetIdx const &) noexcept;
 
 		[[nodiscard]]
-		TileSheet::SubSheet const&activeSubSheet() const noexcept {
+		TileSheet::SubSheet const &activeSubSheet() const noexcept {
 			return getSubSheet(m_img, m_activeSubsSheetIdx);
 		}
 
@@ -100,28 +100,31 @@ class TileSheetEditorModel: public ox::SignalHandler {
 		}
 
 		[[nodiscard]]
-		constexpr TileSheet::SubSheetIdx const&activeSubSheetIdx() const noexcept {
+		constexpr TileSheet::SubSheetIdx const &activeSubSheetIdx() const noexcept {
 			return m_activeSubsSheetIdx;
 		}
 
-		void fill(ox::Point const&pt, int palIdx) noexcept;
+		void fill(ox::Point const &pt, uint8_t palIdx) noexcept;
 
 		ox::Error rotateLeft() noexcept;
 
 		ox::Error rotateRight() noexcept;
 
-		void setSelection(studio::Selection const&sel) noexcept;
+		void setSelection(studio::Selection const &sel) noexcept;
 
-		void select(ox::Point const&pt) noexcept;
+		void select(ox::Point const &pt) noexcept;
 
 		void completeSelection() noexcept;
 
 		void clearSelection() noexcept;
 
+		[[nodiscard]]
+		bool hasSelection() const noexcept;
+
 		[[nodiscard]]
 		bool updated() const noexcept;
 
-		ox::Error markUpdatedCmdId(studio::UndoCommand const*cmd) noexcept;
+		ox::Error markUpdatedCmdId(studio::UndoCommand const *cmd) noexcept;
 
 		ox::Error markUpdated() noexcept;
 
@@ -144,21 +147,21 @@ class TileSheetEditorModel: public ox::SignalHandler {
 		ox::Error moveSubSheet(TileSheet::SubSheetIdx src, TileSheet::SubSheetIdx dst) noexcept;
 
 	private:
-		void getFillPixels(
-			TileSheet::SubSheet const&activeSubSheet,
+		static void getFillPixels(
+			TileSheet::SubSheet const &activeSubSheet,
 			ox::Span<bool> pixels,
-			ox::Point const&pt,
-			int oldColor) const noexcept;
+			ox::Point const &pt,
+			uint8_t oldColor) noexcept;
 
 		void setPalPath() noexcept;
 
-		ox::Error pushCommand(studio::UndoCommand *cmd) noexcept;
+		ox::Error pushCommand(ox::UPtr<studio::UndoCommand> &&cmd) noexcept;
 
-		ox::Error handleFileRename(ox::StringViewCR, ox::StringViewCR newPath, ox::UUID const&id) noexcept;
+		ox::Error handleFileRename(ox::StringViewCR, ox::StringViewCR newPath, ox::UUID const &id) noexcept;
 
 };
 
-constexpr TileSheet const&TileSheetEditorModel::img() const noexcept {
+constexpr TileSheet const &TileSheetEditorModel::img() const noexcept {
 	return m_img;
 }
 
@@ -166,7 +169,7 @@ constexpr TileSheet &TileSheetEditorModel::img() noexcept {
 	return m_img;
 }
 
-constexpr Palette const&TileSheetEditorModel::pal() const noexcept {
+constexpr Palette const &TileSheetEditorModel::pal() const noexcept {
 	if (m_pal) {
 		return *m_pal;
 	}

src/nostalgia/modules/gfx/src/studio/tilesheeteditor/tilesheeteditorview.cpp

@@ -89,7 +89,7 @@ void TileSheetEditorView::clickSelect(ox::Vec2 const&paneSize, ox::Vec2 const&cl
 
 void TileSheetEditorView::clickFill(ox::Vec2 const&paneSize, ox::Vec2 const&clickPos) noexcept {
 	auto const pt = clickPoint(paneSize, clickPos);
-	m_model.fill(pt, static_cast<int>(m_palIdx));
+	m_model.fill(pt, static_cast<uint8_t>(m_palIdx));
 }
 
 void TileSheetEditorView::releaseMouseButton(TileSheetTool tool) noexcept {

src/nostalgia/studio/CMakeLists.txt

@@ -15,7 +15,7 @@ target_link_libraries(
 
 target_compile_definitions(
 	NostalgiaStudio PUBLIC
-		OLYMPIC_APP_VERSION="dev build"
+		OLYMPIC_APP_VERSION="d2025.06.0"
 )
 
 install(

src/nostalgia/studio/Info.plist

@@ -18,7 +18,7 @@
 	<string>APPL</string>
 
 	<key>CFBundleVersion</key>
-	<string>dev build</string>
+	<string>d2025.06.0</string>
 
 	<key>LSMinimumSystemVersion</key>
 	<string>12.0.0</string>

src/olympic/keel/include/keel/assetmanager.hpp

@@ -154,7 +154,7 @@ class AssetRef: public ox::SignalHandler {
 	private:
 		constexpr ox::Error emitUpdated() const noexcept {
 			updated.emit();
-			return ox::Error(0);
+			return {};
 		}
 };
 

src/olympic/keel/include/keel/media.hpp

@@ -60,6 +60,11 @@ ox::Result<ox::CStringView> uuidToPath(Context &ctx, ox::StringViewCR uuid) noex
 
 ox::Result<ox::CStringView> uuidToPath(Context &ctx, ox::UUID const&uuid) noexcept;
 
+[[nodiscard]]
+constexpr bool isUuidUrl(ox::StringViewCR path) noexcept {
+	return ox::beginsWith(path, "uuid://");
+}
+
 #ifndef OX_BARE_METAL
 
 namespace detail {

src/olympic/keel/include/keel/typeconv.hpp

@@ -260,7 +260,7 @@ ox::Result<DstType> convertObjToObj(
 template<typename DstType>
 ox::Result<DstType> convert(Context &ctx, ox::BufferView const&src) noexcept {
 	OX_REQUIRE(out, convert(ctx, src, ox::ModelTypeName_v<DstType>, ox::ModelTypeVersion_v<DstType>));
-	return std::move(wrapCast<DstType>(out));
+	return std::move(wrapCast<DstType>(*out));
 }
 
 template<typename DstType>

src/olympic/studio/applib/include/studioapp/studioapp.hpp

@@ -10,6 +10,6 @@
 
 namespace studio {
 
-void registerModule(studio::Module const*) noexcept;
+void registerModule(Module const*) noexcept;
 
 }

src/olympic/studio/applib/src/CMakeLists.txt

@@ -1,17 +1,17 @@
 add_library(
 	StudioAppLib
-		aboutpopup.cpp
 		app.cpp
 		clawviewer.cpp
-		deleteconfirmation.cpp
 		filedialogmanager.cpp
 		font.cpp
-		makecopypopup.cpp
-		newdir.cpp
-		newmenu.cpp
-		newproject.cpp
+		popups/about.cpp
+		popups/deleteconfirmation.cpp
+		popups/makecopy.cpp
+		popups/newdir.cpp
+		popups/newmenu.cpp
+		popups/newproject.cpp
+		popups/renamefile.cpp
 		projectexplorer.cpp
-		renamefile.cpp
 		studioui.cpp
 )
 target_compile_definitions(

src/olympic/studio/applib/src/app.cpp

@@ -28,10 +28,15 @@ class StudioUIDrawer: public turbine::gl::Drawer {
 };
 
 static void keyEventHandler(turbine::Context &ctx, turbine::Key key, bool down) noexcept {
-	auto sctx = turbine::applicationData<studio::Context>(ctx);
+	auto const sctx = turbine::applicationData<studio::Context>(ctx);
 	sctx->ui.handleKeyEvent(key, down);
 }
 
+static void mouseButtonEventHandler(turbine::Context &ctx, int const btn, bool const down) noexcept {
+	auto const sctx = turbine::applicationData<studio::Context>(ctx);
+	sctx->ui.handleMouseButtonEvent(btn, down);
+}
+
 [[nodiscard]]
 ox::Vector<ox::SpanView<uint8_t>> WindowIcons() noexcept;
 
@@ -43,7 +48,8 @@ static ox::Error runApp(
 	oxLogError(turbine::setWindowIcon(*ctx, WindowIcons()));
 	turbine::setWindowTitle(*ctx, keelCtx(*ctx).appName);
 	turbine::setKeyEventHandler(*ctx, keyEventHandler);
-	turbine::setRefreshWithin(*ctx, 0);
+	turbine::setMouseButtonEventHandler(*ctx, mouseButtonEventHandler);
+	turbine::requireRefreshWithin(*ctx, 0);
 	StudioUI ui(*ctx, projectDataDir);
 	StudioUIDrawer drawer(ui);
 	turbine::gl::addDrawer(*ctx, &drawer);
@@ -71,9 +77,9 @@ static ox::Error run(
 }
 
 ox::Error run(
-		ox::StringView project,
-		ox::StringView appName,
-		ox::StringView projectDataDir,
+		ox::StringView const project,
+		ox::StringView const appName,
+		ox::StringView const projectDataDir,
 		ox::SpanView<ox::CString> args) noexcept {
 	return studio::run(ox::sfmt("{} {}", project, appName), projectDataDir, args);
 }

src/olympic/studio/applib/src/popups/about.cpp

@@ -5,7 +5,7 @@
 #include <imgui.h>
 
 #include <studio/imguiutil.hpp>
-#include "aboutpopup.hpp"
+#include "about.hpp"
 
 namespace olympic {
 extern ox::String appVersion;
@@ -15,7 +15,11 @@ namespace studio {
 
 AboutPopup::AboutPopup(turbine::Context &ctx) noexcept:
 	Popup("About"),
+#ifdef DEBUG
+	m_text{sfmt("{} [DEBUG] - {}", keelCtx(ctx).appName, olympic::appVersion)} {
+#else
 	m_text{sfmt("{} - {}", keelCtx(ctx).appName, olympic::appVersion)} {
+#endif
 }
 
 void AboutPopup::draw(Context &sctx) noexcept {

src/olympic/studio/applib/src/popups/deleteconfirmation.cpp

@@ -2,6 +2,8 @@
  * Copyright 2016 - 2025 Gary Talent (gary@drinkingtea.net). All rights reserved.
  */
 
+#include <turbine/gfx.hpp>
+
 #include <studio/imguiutil.hpp>
 
 #include "deleteconfirmation.hpp"
@@ -43,6 +45,9 @@ void DeleteConfirmation::draw(Context &ctx) noexcept {
 			ImGui::OpenPopup(title().c_str());
 			m_stage = Stage::Open;
 			m_open = true;
+			// require extended refresh in case new contents require resize
+			// this can take around a second
+			turbine::requireRefreshFor(ctx.tctx, 1000);
 		[[fallthrough]];
 		case Stage::Open:
 			drawWindow(ctx.tctx, m_open, [this] {

src/olympic/studio/applib/src/popups/makecopy.cpp

@@ -4,7 +4,7 @@
 
 #include <studio/imguiutil.hpp>
 
-#include "makecopypopup.hpp"
+#include "makecopy.hpp"
 
 namespace studio {
 

src/olympic/studio/applib/src/popups/newmenu.cpp

@@ -80,9 +80,9 @@ void NewMenu::addItemMaker(ox::UPtr<ItemMaker> &&im) noexcept {
 			});
 }
 
-void NewMenu::installItemTemplate(ox::UPtr<ItemTemplate> &tmplt) noexcept {
+void NewMenu::installItemTemplate(ox::UPtr<ItemTemplate> &&tmplt) noexcept {
 	for (auto const&im : m_types) {
-		if (im->installTemplate(tmplt)) {
+		if (im->installTemplate(std::move(tmplt))) {
 			break;
 		}
 	}

src/olympic/studio/applib/src/popups/newmenu.hpp

@@ -72,7 +72,7 @@ class NewMenu final: public Popup {
 
 		void addItemMaker(ox::UPtr<ItemMaker> &&im) noexcept;
 
-		void installItemTemplate(ox::UPtr<ItemTemplate> &tmplt) noexcept;
+		void installItemTemplate(ox::UPtr<ItemTemplate> &&tmplt) noexcept;
 
 	private:
 		void drawNewItemType(Context const&sctx) noexcept;

src/olympic/studio/applib/src/popups/newproject.cpp

@@ -7,7 +7,7 @@
 #include <studio/imguiutil.hpp>
 #include <utility>
 
-#include "filedialogmanager.hpp"
+#include "../filedialogmanager.hpp"
 #include "newproject.hpp"
 
 namespace studio {

src/olympic/studio/applib/src/studioui.cpp

@@ -7,6 +7,8 @@
 
 #include <imgui.h>
 
+#include <ox/std/def.hpp>
+
 #include <keel/media.hpp>
 #include <glutils/glutils.hpp>
 #include <turbine/turbine.hpp>
@@ -17,6 +19,8 @@
 #include "font.hpp"
 #include "studioui.hpp"
 
+#include <complex>
+
 #ifdef OX_OS_Darwin
 #define STUDIO_CTRL "Cmd"
 #else
@@ -30,18 +34,6 @@ static bool shutdownHandler(turbine::Context &ctx) {
 	return sctx->ui.handleShutdown();
 }
 
-void navigateTo(Context &ctx, ox::StringParam filePath, ox::StringParam navArgs) noexcept {
-	ox::String path = std::move(filePath);
-	if (beginsWith(path, "uuid://")) {
-		auto [p, err] = keel::uuidUrlToPath(keelCtx(ctx), path);
-		if (err) {
-			return;
-		}
-		path = p;
-	}
-	ctx.ui.navigateTo(std::move(path), std::move(navArgs));
-}
-
 namespace ig {
 extern bool s_mainWinHasFocus;
 }
@@ -54,7 +46,7 @@ void registerModule(Module const*mod) noexcept {
 }
 
 
-struct StudioConfig {
+struct StudioConfigV1 {
 	static constexpr auto TypeName = "net.drinkingtea.studio.StudioConfig";
 	static constexpr auto TypeVersion = 1;
 	ox::String projectPath;
@@ -63,16 +55,67 @@ struct StudioConfig {
 	bool showProjectExplorer = true;
 };
 
-OX_MODEL_BEGIN(StudioConfig)
+OX_MODEL_BEGIN(StudioConfigV1)
 	OX_MODEL_FIELD_RENAME(activeTabItemName, active_tab_item_name)
 	OX_MODEL_FIELD_RENAME(projectPath, project_path)
 	OX_MODEL_FIELD_RENAME(openFiles, open_files)
 	OX_MODEL_FIELD_RENAME(showProjectExplorer, show_project_explorer)
 OX_MODEL_END()
 
-StudioUI::StudioUI(turbine::Context &ctx, ox::StringParam projectDataDir) noexcept:
-		m_sctx{*this, ctx},
-		m_tctx{ctx},
+
+struct StudioConfigV2 {
+	static constexpr auto TypeName = "net.drinkingtea.studio.StudioConfig";
+	static constexpr auto TypeVersion = 2;
+	struct ProjectConfig {
+		static constexpr auto TypeName = "net.drinkingtea.studio.ProjectConfig";
+		static constexpr auto TypeVersion = 2;
+		ox::String projectPath;
+		ox::String activeTabItemName;
+		ox::Vector<ox::String> openFiles;
+	};
+	ox::Vector<ProjectConfig> projects;
+	bool showProjectExplorer = true;
+
+	[[nodiscard]]
+	constexpr ProjectConfig const *project() const {
+		return projects.empty() ? nullptr : &projects[0];
+	}
+
+	[[nodiscard]]
+	constexpr ProjectConfig *project() {
+		return projects.empty() ? nullptr : &projects[0];
+	}
+};
+
+OX_MODEL_BEGIN(StudioConfigV2::ProjectConfig)
+	OX_MODEL_FIELD_RENAME(activeTabItemName, active_tab_item_name)
+	OX_MODEL_FIELD_RENAME(projectPath, project_path)
+	OX_MODEL_FIELD_RENAME(openFiles, open_files)
+OX_MODEL_END()
+
+OX_MODEL_BEGIN(StudioConfigV2)
+	OX_MODEL_FIELD(projects)
+	OX_MODEL_FIELD_RENAME(showProjectExplorer, show_project_explorer)
+OX_MODEL_END()
+
+static ox::Error convertStudioConfigV1ToStudioConfigV2(
+		keel::Context&,
+		StudioConfigV1 &src,
+		StudioConfigV2 &dst) noexcept {
+	dst.projects.emplace_back(StudioConfigV2::ProjectConfig{
+		.projectPath = std::move(src.projectPath),
+		.activeTabItemName = std::move(src.activeTabItemName),
+		.openFiles = std::move(src.openFiles),
+	});
+	dst.showProjectExplorer = src.showProjectExplorer;
+	return {};
+}
+
+using StudioConfig = StudioConfigV2;
+
+
+StudioUI::StudioUI(turbine::Context &tctx, ox::StringParam projectDataDir) noexcept:
+		m_sctx{*this, tctx},
 		m_projectDataDir{std::move(projectDataDir)} {
 	{
 		ImFontConfig fontCfg;
@@ -83,12 +126,18 @@ StudioUI::StudioUI(turbine::Context &ctx, ox::StringParam projectDataDir) noexce
 		// but AddFontFromMemoryTTF requires a mutable buffer.
 		// However, setting fontCfg.FontDataOwnedByAtlas ensures
 		// that it will still be treated as const.
-		// ImGui documentation recognize that this is a bad design,
+		// ImGui documentation recognizes that this is a bad design,
 		// and hopefully it will change at some point.
 		io.Fonts->AddFontFromMemoryTTF(const_cast<uint8_t*>(font.data()), static_cast<int>(font.size()), 13, &fontCfg);
 	}
+	auto &kctx = keelCtx(m_tctx);
+	kctx.converters.emplace_back(keel::Converter::make<convertStudioConfigV1ToStudioConfigV2>());
+	oxLogError(headerizeConfigFile<StudioConfigV1>(kctx));
 	turbine::setApplicationData(m_tctx, &m_sctx);
 	turbine::setShutdownHandler(m_tctx, shutdownHandler);
+	m_sctx.navCallback = [this](ox::StringParam filePath, ox::StringParam navArgs) {
+		handleNavigationChange(std::move(filePath), std::move(navArgs));
+	};
 	m_projectExplorer.fileChosen.connect(this, &StudioUI::openFile);
 	m_projectExplorer.addDir.connect(this, &StudioUI::addDir);
 	m_projectExplorer.addItem.connect(this, &StudioUI::addFile);
@@ -102,21 +151,14 @@ StudioUI::StudioUI(turbine::Context &ctx, ox::StringParam projectDataDir) noexce
 	m_newMenu.finished.connect(this, &StudioUI::openFile);
 	m_closeAppConfirm.response.connect(this, &StudioUI::handleCloseAppResponse);
 	m_closeFileConfirm.response.connect(this, &StudioUI::handleCloseFileResponse);
+	m_removeRecentProject.dlg.response.connect(this, &StudioUI::handleRemoveRecentProjectResponse);
 	loadModules();
 	// open project and files
 	auto const [config, err] = studio::readConfig<StudioConfig>(keelCtx(m_tctx));
 	m_showProjectExplorer = config.showProjectExplorer;
 	if (!err) {
-		auto const openProjErr = openProjectPath(config.projectPath);
-		if (!openProjErr) {
-			for (auto const&f: config.openFiles) {
-				auto const openFileErr = openFileActiveTab(f, config.activeTabItemName == f);
-				if (openFileErr) {
-					oxErrorf("\nCould not open editor for file:\n\t{}\nReason:\n\t{}\n", f, toStr(openFileErr));
-					continue;
-				}
-				m_activeEditor = m_editors.back().value->get();
-			}
+		if (auto const pc = config.project()) {
+			oxLogError(openProjectPath(pc->projectPath));
 		}
 	} else {
 		if constexpr(!ox::defines::Debug) {
@@ -135,14 +177,24 @@ void StudioUI::handleKeyEvent(turbine::Key const key, bool const down) noexcept
 	}
 }
 
-void StudioUI::navigateTo(ox::StringParam path, ox::StringParam navArgs) noexcept {
+void StudioUI::handleMouseButtonEvent(int const btn, bool const down) noexcept {
+	if (down) {
+		if (btn == 3) { // back button
+			navigateBack(m_sctx);
+		} else if (btn == 4) { // forward button
+			navigateForward(m_sctx);
+		}
+	}
+}
+
+void StudioUI::handleNavigationChange(ox::StringParam path, ox::StringParam navArgs) noexcept {
 	m_navAction.emplace(std::move(path), std::move(navArgs));
 }
 
 void StudioUI::draw() noexcept {
 	glutils::clearScreen();
 	drawMenu();
-	auto const&viewport = *ImGui::GetMainViewport();
+	auto const &viewport = *ImGui::GetMainViewport();
 	ImGui::SetNextWindowPos(viewport.WorkPos);
 	ImGui::SetNextWindowSize(viewport.WorkSize);
 	ImGui::SetNextWindowViewport(viewport.ID);
@@ -194,6 +246,18 @@ void StudioUI::drawMenu() noexcept {
 			if (ImGui::MenuItem("Open Project...", STUDIO_CTRL "+O")) {
 				m_taskRunner.add(*ox::make<FileDialogManager>(this, &StudioUI::openProjectPath));
 			}
+			if (ImGui::BeginMenu("Recent Projects", m_recentProjects.size() > 1)) {
+				for (size_t i = 1; i < m_recentProjects.size(); ++i) {
+					auto const &p = m_recentProjects[i];
+					if (ImGui::MenuItem(p.c_str())) {
+						if (openProjectPath(p)) {
+							m_removeRecentProject.idx = i;
+							m_removeRecentProject.dlg.open();
+						}
+					}
+				}
+				ImGui::EndMenu();
+			}
 			if (ImGui::MenuItem(
 					"Save",
 					STUDIO_CTRL "+S",
@@ -207,7 +271,7 @@ void StudioUI::drawMenu() noexcept {
 			ImGui::EndMenu();
 		}
 		if (ImGui::BeginMenu("Edit")) {
-			auto undoStack = m_activeEditor ? m_activeEditor->undoStack() : nullptr;
+			auto const undoStack = m_activeEditor ? m_activeEditor->undoStack() : nullptr;
 			if (ImGui::MenuItem(
 					"Undo", STUDIO_CTRL "+Z", false, undoStack && undoStack->canUndo())) {
 				oxLogError(undoStack->undo());
@@ -247,6 +311,19 @@ void StudioUI::drawMenu() noexcept {
 			}
 			ImGui::EndMenu();
 		}
+		if (ImGui::BeginMenu("Navigate")) {
+			constexpr auto backShortcut = ox::defines::OS == ox::OS::Darwin ? "Cmd+[" : "Alt+Left Arrow";
+			constexpr auto fwdShortcut = ox::defines::OS == ox::OS::Darwin ? "Cmd+]" : "Alt+Right Arrow";
+			if (ImGui::MenuItem("Back", backShortcut, false, m_sctx.navIdx > 1)) {
+				navigateBack(m_sctx);
+			}
+			if (ImGui::MenuItem(
+				"Forward", fwdShortcut, false,
+				m_sctx.navIdx < m_sctx.navStack.size())) {
+				navigateForward(m_sctx);
+			}
+			ImGui::EndMenu();
+		}
 		if (ImGui::BeginMenu("Help")) {
 			if (ImGui::MenuItem("About")) {
 				m_aboutPopup.open();
@@ -270,7 +347,7 @@ void StudioUI::drawTabBar() noexcept {
 
 void StudioUI::drawTabs() noexcept {
 	for (auto it = m_editors.begin(); it != m_editors.end();) {
-		auto const&e = *it;
+		auto const &e = *it;
 		auto open = true;
 		auto const unsavedChanges = e->unsavedChanges() ? ImGuiTabItemFlags_UnsavedDocument : 0;
 		auto const selected = m_activeEditorUpdatePending == e.get() ?  ImGuiTabItemFlags_SetSelected : 0;
@@ -279,19 +356,27 @@ void StudioUI::drawTabs() noexcept {
 			if (m_activeEditor != e.get()) [[unlikely]] {
 				m_activeEditor = e.get();
 				studio::editConfig<StudioConfig>(keelCtx(m_tctx), [&](StudioConfig &config) {
-					config.activeTabItemName = m_activeEditor->itemPath();
+					if (auto const pc = config.project()) {
+						pc->activeTabItemName = m_activeEditor->itemPath();
+					}
 				});
-				turbine::setRefreshWithin(m_tctx, 0);
+				turbine::requireRefreshWithin(m_tctx, 0);
 			} else [[likely]] {
 				if (m_activeEditorUpdatePending == e.get()) [[unlikely]] {
 					m_activeEditorUpdatePending = nullptr;
 				}
 				if (m_activeEditorOnLastDraw != e.get()) [[unlikely]] {
 					m_activeEditor->onActivated();
+					if (!m_sctx.navIdx ||
+						(m_sctx.navIdx <= m_sctx.navStack.size() &&
+							m_sctx.navStack[m_sctx.navIdx - 1].filePath != m_activeEditor->itemPath())) {
+						m_sctx.navStack.resize(m_sctx.navIdx);
+						++m_sctx.navIdx;
+						m_sctx.navStack.emplace_back(ox::String{m_activeEditor->itemPath()}, ox::String{""});
+					}
 				}
 				if (m_closeActiveTab) [[unlikely]] {
 					ImGui::SetTabItemClosed(e->itemDisplayName().c_str());
-
 				} else if (open) [[likely]] {
 					e->draw(m_sctx);
 				}
@@ -331,20 +416,21 @@ void StudioUI::drawTabs() noexcept {
 		m_closeActiveTab = false;
 	}
 	if (m_navAction) {
-		oxLogError(openFile(m_navAction->path));
-		m_activeEditor->navigateTo(m_navAction->args);
-		m_navAction.reset();
+		if (!openFile(m_navAction->path)) {
+			m_activeEditor->navigateTo(m_navAction->args);
+			m_navAction.reset();
+		}
 	}
 }
 
-void StudioUI::loadEditorMaker(EditorMaker const&editorMaker) noexcept {
-	for (auto const&ext : editorMaker.fileTypes) {
+void StudioUI::loadEditorMaker(EditorMaker const &editorMaker) noexcept {
+	for (auto const &ext : editorMaker.fileTypes) {
 		m_editorMakers[ext] = editorMaker.make;
 	}
 }
 
-void StudioUI::loadModule(Module const&mod) noexcept {
-	for (auto const&editorMaker : mod.editors(m_sctx)) {
+void StudioUI::loadModule(Module const &mod) noexcept {
+	for (auto const &editorMaker : mod.editors(m_sctx)) {
 		loadEditorMaker(editorMaker);
 	}
 	for (auto &im : mod.itemMakers(m_sctx)) {
@@ -352,7 +438,7 @@ void StudioUI::loadModule(Module const&mod) noexcept {
 	}
 	auto tmplts = mod.itemTemplates(m_sctx);
 	for (auto &t : tmplts) {
-		m_newMenu.installItemTemplate(t);
+		m_newMenu.installItemTemplate(std::move(t));
 	}
 }
 
@@ -442,6 +528,22 @@ void StudioUI::handleKeyInput() noexcept {
 				}
 			}
 		}
+		if constexpr (ox::defines::OS == ox::OS::Darwin) {
+			if (ImGui::IsKeyPressed(ImGuiKey_LeftBracket)) {
+				navigateBack(m_sctx);
+			} else if (ImGui::IsKeyPressed(ImGuiKey_RightBracket)) {
+				navigateForward(m_sctx);
+			}
+		}
+	}
+	if constexpr (ox::defines::OS != ox::OS::Darwin) {
+		if (ImGui::IsKeyDown(ImGuiKey_ModAlt)) {
+			if (ImGui::IsKeyPressed(ImGuiKey_LeftArrow)) {
+				navigateBack(m_sctx);
+			} else if (ImGui::IsKeyPressed(ImGuiKey_RightArrow)) {
+				navigateForward(m_sctx);
+			}
+		}
 	}
 }
 
@@ -464,14 +566,16 @@ ox::Error StudioUI::renameFile(ox::StringViewCR path) noexcept {
 	return m_renameFile.openPath(path);
 }
 
-ox::Error StudioUI::handleMoveFile(ox::StringViewCR oldPath, ox::StringViewCR newPath, ox::UUID const&) noexcept {
+ox::Error StudioUI::handleMoveFile(ox::StringViewCR oldPath, ox::StringViewCR newPath, ox::UUID const &) noexcept {
 	for (auto &f : m_openFiles) {
 		if (f == oldPath) {
 			f = newPath;
 			editConfig<StudioConfig>(keelCtx(m_sctx), [&](StudioConfig &cfg) {
-				auto p = find(cfg.openFiles.begin(), cfg.openFiles.end(), oldPath);
-				*p = newPath;
-				cfg.activeTabItemName = newPath;
+				if (auto const pc = cfg.project()) {
+					auto p = find(pc->openFiles.begin(), pc->openFiles.end(), oldPath);
+					*p = newPath;
+					pc->activeTabItemName = newPath;
+				}
 			});
 			break;
 		}
@@ -485,24 +589,36 @@ ox::Error StudioUI::handleMoveFile(ox::StringViewCR oldPath, ox::StringViewCR ne
 
 ox::Error StudioUI::handleDeleteDir(ox::StringViewCR path) noexcept {
 	auto const p = sfmt("{}/", path);
-	for (auto &e : m_editors) {
-		if (beginsWith(e->itemPath(), p)) {
-			oxLogError(closeFile(path));
-			m_closeActiveTab = true;
-			break;
-		}
-	}
+	std::ignore = m_editors.erase(
+		std::remove_if(
+			m_editors.begin(), m_editors.end(),
+			[&](ox::UPtr<BaseEditor> const &e) {
+				if (beginsWith(e->itemPath(), p)) {
+					oxLogError(closeFile(path));
+					if (e.get() != m_activeEditor) {
+						return true;
+					}
+					m_closeActiveTab = true;
+				}
+				return false;
+			}));
 	return m_projectExplorer.refreshProjectTreeModel();
 }
 
 ox::Error StudioUI::handleDeleteFile(ox::StringViewCR path) noexcept {
-	for (auto &e : m_editors) {
-		if (path == e->itemPath()) {
-			oxLogError(closeFile(path));
-			m_closeActiveTab = true;
-			break;
-		}
-	}
+	std::ignore = m_editors.erase(
+		std::remove_if(
+			m_editors.begin(), m_editors.end(),
+			[&](ox::UPtr<BaseEditor> const &e) {
+				if (path == e->itemPath()) {
+					oxLogError(closeFile(path));
+					if (e.get() != m_activeEditor) {
+						return true;
+					}
+					m_closeActiveTab = true;
+				}
+				return false;
+			}));
 	return m_projectExplorer.refreshProjectTreeModel();
 }
 
@@ -533,6 +649,9 @@ ox::Error StudioUI::openProjectPath(ox::StringParam path) noexcept {
 			ox::make_unique_catch<Project>(keelCtx(m_tctx), std::move(path), m_projectDataDir)
 			        .moveTo(m_project));
 	m_sctx.project = m_project.get();
+	m_activeEditor = nullptr;
+	m_activeEditorOnLastDraw = nullptr;
+	m_activeEditorUpdatePending = nullptr;
 	turbine::setWindowTitle(
 		m_tctx, ox::sfmt("{} - {}", keelCtx(m_tctx).appName, m_project->projectPath()));
 	m_deleteConfirmation.deleteFile.connect(m_sctx.project, &Project::deleteItem);
@@ -546,8 +665,36 @@ ox::Error StudioUI::openProjectPath(ox::StringParam path) noexcept {
 	m_openFiles.clear();
 	m_editors.clear();
 	studio::editConfig<StudioConfig>(keelCtx(m_tctx), [&](StudioConfig &config) {
-		config.projectPath = ox::String(m_project->projectPath());
-		config.openFiles.clear();
+		auto const pcIt = std::find_if(
+			config.projects.begin(), config.projects.end(),
+			[this](StudioConfig::ProjectConfig const &pc) {
+				return pc.projectPath == m_project->projectPath();
+			});
+		if (pcIt != config.projects.end()) {
+			auto p = std::move(*pcIt);
+			std::ignore = config.projects.erase(pcIt);
+			auto &pc = *config.projects.emplace(0, std::move(p));
+			for (auto const &f: pc.openFiles) {
+				auto const openFileErr = openFileActiveTab(f, pc.activeTabItemName == f);
+				if (openFileErr) {
+					oxErrorf("\nCould not open editor for file:\n\t{}\nReason:\n\t{}\n", f, toStr(openFileErr));
+					continue;
+				}
+				m_activeEditor = m_editors.back().value->get();
+			}
+		} else {
+			config.projects.emplace(0, StudioConfig::ProjectConfig{
+				.projectPath = ox::String{m_project->projectPath()},
+				.activeTabItemName = {},
+				.openFiles = {},
+			});
+		}
+		config.projects.resize(ox::min<size_t>(10, config.projects.size()));
+		m_recentProjects.clear();
+		m_recentProjects.reserve(config.projects.size());
+		for (auto const &p : config.projects) {
+			m_recentProjects.emplace_back(p.projectPath);
+		}
 	});
 	return m_projectExplorer.refreshProjectTreeModel();
 }
@@ -558,7 +705,10 @@ ox::Error StudioUI::openFile(ox::StringViewCR path) noexcept {
 
 ox::Error StudioUI::openFileActiveTab(ox::StringViewCR path, bool const makeActiveTab) noexcept {
 	if (!m_project) {
-		return ox::Error(1, "No project open to open a file from");
+		return ox::Error(1, "no project open to open a file from");
+	}
+	if (!m_project->romFs().exists(path)) {
+		return ox::Error{1, "file does note exist"};
 	}
 	if (m_openFiles.contains(path)) {
 		for (auto &e : m_editors) {
@@ -572,10 +722,10 @@ ox::Error StudioUI::openFileActiveTab(ox::StringViewCR path, bool const makeActi
 	}
 	OX_REQUIRE(ext, fileExt(path));
 	// create Editor
-	BaseEditor *editor = nullptr;
+	ox::UPtr<BaseEditor> editor;
 	auto const err = m_editorMakers.contains(ext) ?
-		m_editorMakers[ext](path).moveTo(editor) :
-		ox::makeCatch<ClawEditor>(m_sctx, path).moveTo(editor);
+		m_editorMakers[ext](path).to<ox::UPtr<BaseEditor>>().moveTo(editor) :
+		ox::make_unique_catch<ClawEditor>(m_sctx, path).moveTo(editor);
 	if (err) {
 		if constexpr(!ox::defines::Debug) {
 			oxErrf("Could not open Editor: {}\n", toStr(err));
@@ -585,16 +735,18 @@ ox::Error StudioUI::openFileActiveTab(ox::StringViewCR path, bool const makeActi
 		return err;
 	}
 	editor->closed.connect(this, &StudioUI::closeFile);
-	m_editors.emplace_back(editor);
+	auto const &e = m_editors.emplace_back(std::move(editor));
 	m_openFiles.emplace_back(path);
 	if (makeActiveTab) {
 		m_activeEditor = m_editors.back().value->get();
-		m_activeEditorUpdatePending = editor;
+		m_activeEditorUpdatePending = e.get();
 	}
 	// save to config
 	studio::editConfig<StudioConfig>(keelCtx(m_tctx), [&path](StudioConfig &config) {
-		if (!config.openFiles.contains(path)) {
-			config.openFiles.emplace_back(path);
+		if (auto const pc = config.project()) {
+			if (!pc->openFiles.contains(path)) {
+				pc->openFiles.emplace_back(path);
+			}
 		}
 	});
 	return {};
@@ -618,6 +770,22 @@ ox::Error StudioUI::handleCloseFileResponse(ig::PopupResponse const response) no
 	return {};
 }
 
+ox::Error StudioUI::handleRemoveRecentProjectResponse(ig::PopupResponse const response) noexcept {
+	if (response == ig::PopupResponse::OK) {
+		auto const p = std::move(m_recentProjects[m_removeRecentProject.idx]);
+		studio::editConfig<StudioConfig>(keelCtx(m_tctx), [&p](StudioConfig &config) {
+			std::ignore = config.projects.erase(
+				std::remove_if(
+					config.projects.begin(), config.projects.end(),
+					[&p](StudioConfig::ProjectConfig const &pc) {
+						return pc.projectPath == p;
+					}));
+		});
+		return m_recentProjects.erase(m_removeRecentProject.idx).error;
+	}
+	return {};
+}
+
 ox::Error StudioUI::closeCurrentFile() noexcept {
 	for (auto &e : m_editors) {
 		if (m_activeEditor == e.get()) {
@@ -636,7 +804,9 @@ ox::Error StudioUI::closeFile(ox::StringViewCR path) noexcept {
 	std::ignore = m_openFiles.erase(std::remove(m_openFiles.begin(), m_openFiles.end(), path));
 	// save to config
 	studio::editConfig<StudioConfig>(keelCtx(m_tctx), [&](StudioConfig &config) {
-		std::ignore = config.openFiles.erase(std::remove(config.openFiles.begin(), config.openFiles.end(), path));
+		if (auto const pc = config.project()) {
+			std::ignore = pc->openFiles.erase(std::remove(pc->openFiles.begin(), pc->openFiles.end(), path));
+		}
 	});
 	return {};
 }

src/olympic/studio/applib/src/studioui.hpp

@@ -14,23 +14,23 @@
 #include <studio/project.hpp>
 #include <studio/task.hpp>
 
-#include "aboutpopup.hpp"
-#include "deleteconfirmation.hpp"
-#include "makecopypopup.hpp"
-#include "newdir.hpp"
-#include "newmenu.hpp"
-#include "newproject.hpp"
+#include "popups/about.hpp"
+#include "popups/deleteconfirmation.hpp"
+#include "popups/makecopy.hpp"
+#include "popups/newdir.hpp"
+#include "popups/newmenu.hpp"
+#include "popups/newproject.hpp"
 #include "projectexplorer.hpp"
-#include "renamefile.hpp"
+#include "popups/renamefile.hpp"
 
 namespace studio {
 
-class StudioUI: public ox::SignalHandler {
+class StudioUI final: public ox::SignalHandler {
 	friend class StudioUIDrawer;
 
 	private:
 		Context m_sctx;
-		turbine::Context &m_tctx;
+		turbine::Context &m_tctx{m_sctx.tctx};
 		ox::String m_projectDataDir;
 		ox::UPtr<Project> m_project;
 		TaskRunner m_taskRunner;
@@ -44,6 +44,7 @@ class StudioUI: public ox::SignalHandler {
 		bool m_closeActiveTab{};
 		ox::Vector<ox::Pair<ox::String>> m_queuedMoves;
 		ox::Vector<ox::Pair<ox::String>> m_queuedDirMoves;
+		ox::Vector<ox::String> m_recentProjects;
 		NewMenu m_newMenu{keelCtx(m_tctx)};
 		AboutPopup m_aboutPopup{m_tctx};
 		DeleteConfirmation m_deleteConfirmation;
@@ -57,7 +58,11 @@ class StudioUI: public ox::SignalHandler {
 		MakeCopyPopup m_copyFilePopup;
 		RenameFile m_renameFile;
 		NewProject m_newProject{m_projectDataDir};
-		ox::Array<Widget*, 10> const m_widgets {
+		struct {
+			ig::QuestionPopup dlg{"Remove From Recents?", "Unable to load project. Remove from recent projects?"};
+			size_t idx{};
+		} m_removeRecentProject;
+		ox::Array<Widget*, 11> const m_widgets {
 			&m_closeFileConfirm,
 			&m_closeAppConfirm,
 			&m_copyFilePopup,
@@ -68,6 +73,7 @@ class StudioUI: public ox::SignalHandler {
 			&m_newDirDialog,
 			&m_renameFile,
 			&m_messagePopup,
+			&m_removeRecentProject.dlg,
 		};
 		bool m_showProjectExplorer = true;
 		struct NavAction {
@@ -77,11 +83,13 @@ class StudioUI: public ox::SignalHandler {
 		ox::Optional<NavAction> m_navAction;
 
 	public:
-		explicit StudioUI(turbine::Context &ctx, ox::StringParam projectDataDir) noexcept;
+		explicit StudioUI(turbine::Context &tctx, ox::StringParam projectDataDir) noexcept;
 
 		void handleKeyEvent(turbine::Key, bool down) noexcept;
 
-		void navigateTo(ox::StringParam path, ox::StringParam navArgs) noexcept;
+		void handleMouseButtonEvent(int btn, bool down) noexcept;
+
+		void handleNavigationChange(ox::StringParam path, ox::StringParam navArgs) noexcept;
 
 		[[nodiscard]]
 		constexpr Project *project() noexcept {
@@ -100,9 +108,9 @@ class StudioUI: public ox::SignalHandler {
 
 		void drawTabs() noexcept;
 
-		void loadEditorMaker(EditorMaker const&editorMaker) noexcept;
+		void loadEditorMaker(EditorMaker const &editorMaker) noexcept;
 
-		void loadModule(Module const&mod) noexcept;
+		void loadModule(Module const &mod) noexcept;
 
 		void loadModules() noexcept;
 
@@ -124,7 +132,7 @@ class StudioUI: public ox::SignalHandler {
 
 		ox::Error renameFile(ox::StringViewCR path) noexcept;
 
-		ox::Error handleMoveFile(ox::StringViewCR oldPath, ox::StringViewCR newPath, ox::UUID const&id) noexcept;
+		ox::Error handleMoveFile(ox::StringViewCR oldPath, ox::StringViewCR newPath, ox::UUID const &id) noexcept;
 
 		ox::Error handleDeleteDir(ox::StringViewCR path) noexcept;
 
@@ -144,6 +152,8 @@ class StudioUI: public ox::SignalHandler {
 
 		ox::Error handleCloseFileResponse(ig::PopupResponse response) noexcept;
 
+		ox::Error handleRemoveRecentProjectResponse(ig::PopupResponse response) noexcept;
+
 		ox::Error closeCurrentFile() noexcept;
 
 		ox::Error closeFile(ox::StringViewCR path) noexcept;

src/olympic/studio/modlib/include/studio/configio.hpp

@@ -4,21 +4,21 @@
 
 #pragma once
 
+#include <ox/claw/claw.hpp>
 #include <ox/fs/fs.hpp>
 #include <ox/model/typenamecatcher.hpp>
-#include <ox/oc/oc.hpp>
 #include <ox/std/buffer.hpp>
 #include <ox/std/defines.hpp>
 #include <ox/std/fmt.hpp>
-#include <ox/std/trace.hpp>
 #include <ox/std/string.hpp>
+#include <ox/std/trace.hpp>
 
 #include <keel/context.hpp>
 
 namespace studio {
 
 namespace detail {
-inline ox::String slashesToPct(ox::StringView str) noexcept {
+inline ox::String slashesToPct(ox::StringViewCR str) noexcept {
 	auto out = ox::String{str};
 	for (auto&c: out) {
 		if (c == '/' || c == '\\') {
@@ -30,78 +30,102 @@ inline ox::String slashesToPct(ox::StringView str) noexcept {
 }
 
 [[nodiscard]]
-ox::String configPath(keel::Context const&ctx) noexcept;
+ox::String configPath(keel::Context const &kctx) noexcept;
 
 template<typename T>
-ox::Result<T> readConfig(keel::Context &ctx, ox::StringViewCR name) noexcept {
+ox::Result<T> readConfig(keel::Context &kctx, ox::StringViewCR name) noexcept {
 	oxAssert(name != "", "Config type has no TypeName");
 	auto const path = ox::sfmt("/{}.json", detail::slashesToPct(name));
-	ox::PassThroughFS fs(configPath(ctx));
+	ox::PassThroughFS fs(configPath(kctx));
 	auto const [buff, err] = fs.read(path);
 	if (err) {
 		//oxErrf("Could not read config file: {} - {}\n", path, toStr(err));
 		return err;
 	}
-	return ox::readOC<T>(buff);
+	OX_REQUIRE(id, ox::readClawTypeId(buff));
+	ox::Result<T> out;
+	if (id != ox::ModelTypeId_v<T>) {
+		out = keel::convert<T>(kctx, buff);
+	} else {
+		out = ox::readClaw<T>(buff);
+	}
+	OX_RETURN_ERROR(out);
+	OX_RETURN_ERROR(keel::ensureValid(out.value));
+	return out;
 }
 
 template<typename T>
-ox::Result<T> readConfig(keel::Context &ctx) noexcept {
+ox::Result<T> readConfig(keel::Context &kctx) noexcept {
 	constexpr auto TypeName = ox::requireModelTypeName<T>();
-	return readConfig<T>(ctx, TypeName);
+	return readConfig<T>(kctx, TypeName);
 }
 
 template<typename T>
-ox::Error writeConfig(keel::Context &ctx, ox::StringViewCR name, T const&data) noexcept {
+ox::Error writeConfig(keel::Context &kctx, ox::StringViewCR name, T const &data) noexcept {
 	oxAssert(name != "", "Config type has no TypeName");
 	auto const path = ox::sfmt("/{}.json", detail::slashesToPct(name));
-	ox::PassThroughFS fs(configPath(ctx));
+	ox::PassThroughFS fs(configPath(kctx));
 	if (auto const err = fs.mkdir("/", true)) {
 		//oxErrf("Could not create config directory: {} - {}\n", path, toStr(err));
 		return err;
 	}
-	OX_REQUIRE_M(buff, ox::writeOC(data));
+	OX_REQUIRE_M(buff, ox::writeClaw(data, ox::ClawFormat::Organic));
 	*buff.back().value = '\n';
 	if (auto const err = fs.write(path, buff.data(), buff.size())) {
 		//oxErrf("Could not read config file: {} - {}\n", path, toStr(err));
-		return ox::Error(2, "Could not read config file");
+		return ox::Error{2, "Could not read config file"};
 	}
 	return {};
 }
 
 template<typename T>
-ox::Error writeConfig(keel::Context &ctx, T const&data) noexcept {
+ox::Error writeConfig(keel::Context &kctx, T const &data) noexcept {
 	constexpr auto TypeName = ox::requireModelTypeName<T>();
-	return writeConfig(ctx, TypeName, data);
+	return writeConfig(kctx, TypeName, data);
 }
 
 template<typename T, typename Func>
-void openConfig(keel::Context &ctx, ox::StringViewCR name, Func f) noexcept {
+void openConfig(keel::Context &kctx, ox::StringViewCR name, Func f) noexcept {
 	oxAssert(name != "", "Config type has no TypeName");
-	auto const [c, err] = readConfig<T>(ctx, name);
+	auto const [c, err] = readConfig<T>(kctx, name);
 	oxLogError(err);
 	f(c);
 }
 
 template<typename T, typename Func>
-void openConfig(keel::Context &ctx, Func f) noexcept {
+void openConfig(keel::Context &kctx, Func f) noexcept {
 	constexpr auto TypeName = ox::requireModelTypeName<T>();
-	openConfig<T>(ctx, TypeName, f);
+	openConfig<T>(kctx, TypeName, f);
 }
 
 template<typename T, typename Func>
-void editConfig(keel::Context &ctx, ox::StringViewCR name, Func f) noexcept {
+void editConfig(keel::Context &kctx, ox::StringViewCR name, Func f) noexcept {
 	oxAssert(name !=  "", "Config type has no TypeName");
-	auto [c, err] = readConfig<T>(ctx, name);
+	auto [c, err] = readConfig<T>(kctx, name);
 	oxLogError(err);
 	f(c);
-	oxLogError(writeConfig(ctx, name, c));
+	oxLogError(writeConfig(kctx, name, c));
 }
 
 template<typename T, typename Func>
-void editConfig(keel::Context &ctx, Func f) noexcept {
+void editConfig(keel::Context &kctx, Func f) noexcept {
 	constexpr auto TypeName = ox::requireModelTypeName<T>();
-	editConfig<T>(ctx, TypeName, f);
+	editConfig<T>(kctx, TypeName, f);
+}
+
+/**
+ * Older config files didn't use ClawHeaders, so they can't
+ * use the normal conversion system.
+ * Functions like this shouldn't be necessary moving forward.
+ */
+template<typename T>
+ox::Error headerizeConfigFile(keel::Context &kctx, ox::StringViewCR name = ox::ModelTypeName_v<T>) noexcept {
+	auto const path = ox::sfmt("/{}.json", detail::slashesToPct(name));
+	ox::PassThroughFS fs(configPath(kctx));
+	OX_REQUIRE_M(buff, fs.read(path));
+	OX_REQUIRE_M(cv1, ox::readOC<T>(buff));
+	OX_RETURN_ERROR(ox::writeClaw(cv1, ox::ClawFormat::Organic).moveTo(buff));
+	return fs.write(path, buff);
 }
 
 }

src/olympic/studio/modlib/include/studio/context.hpp

@@ -15,11 +15,24 @@ namespace studio {
 class StudioUI;
 
 struct Context {
-	StudioUI &ui;
-	Project *project = nullptr;
-	turbine::Context &tctx;
-	Context(StudioUI &pUi, turbine::Context &pTctx) noexcept:
-		ui(pUi), tctx(pTctx) {}
+	public:
+		friend void navigateTo(Context &ctx, ox::StringParam filePath, ox::StringParam navArgs) noexcept;
+		friend void navigateBack(Context &ctx) noexcept;
+		friend void navigateForward(Context &ctx) noexcept;
+		friend StudioUI;
+		StudioUI &ui;
+		Project *project = nullptr;
+		turbine::Context &tctx;
+	protected:
+		struct NavPath {
+			ox::String filePath;
+			ox::String navArgs;
+		};
+		size_t navIdx{};
+		ox::Vector<NavPath> navStack;
+		std::function<void(ox::StringParam filePath, ox::StringParam navArgs)> navCallback;
+		Context(StudioUI &pUi, turbine::Context &pTctx) noexcept:
+			ui{pUi}, tctx{pTctx} {}
 };
 
 [[nodiscard]]
@@ -27,6 +40,15 @@ inline keel::Context &keelCtx(Context &ctx) noexcept {
 	return keelCtx(ctx.tctx);
 }
 
+[[nodiscard]]
+inline keel::Context const &keelCtx(Context const &ctx) noexcept {
+	return keelCtx(ctx.tctx);
+}
+
 void navigateTo(Context &ctx, ox::StringParam filePath, ox::StringParam navArgs = "") noexcept;
 
+void navigateBack(Context &ctx) noexcept;
+
+void navigateForward(Context &ctx) noexcept;
+
 }

src/olympic/studio/modlib/include/studio/filepickerpopup.hpp

@@ -13,7 +13,11 @@ class FilePickerPopup {
 
 	private:
 		ox::String m_name;
-		FileExplorer m_explorer;
+		struct Explorer: public FileExplorer {
+			mutable bool opened{};
+			explicit Explorer(keel::Context &kctx);
+			void fileOpened(ox::StringViewCR path) const noexcept override;
+		} m_explorer;
 		ox::Vector<ox::String> const m_fileExts;
 		bool m_open{};
 
@@ -33,6 +37,10 @@ class FilePickerPopup {
 
 		ox::Optional<ox::String> draw(Context &ctx) noexcept;
 
+	private:
+		[[nodiscard]]
+		ox::Optional<ox::String> handlePick() noexcept;
+
 };
 
 }

src/olympic/studio/modlib/include/studio/imguiutil.hpp

@@ -46,14 +46,14 @@ ox::Result<T> getDragDropPayload() noexcept {
 			static_cast<size_t>(payload->DataSize)});
 }
 
-ox::Error setDragDropPayload(ox::CStringViewCR name, auto const&obj) noexcept {
+ox::Error setDragDropPayload(ox::CStringViewCR name, auto const &obj) noexcept {
 	OX_REQUIRE(buff, ox::writeClaw(obj, ox::ClawFormat::Metal));
 	ImGui::SetDragDropPayload(name.c_str(), buff.data(), buff.size());
 	return {};
 }
 
 template<typename T>
-ox::Error setDragDropPayload(T const&obj) noexcept {
+ox::Error setDragDropPayload(T const &obj) noexcept {
 	OX_REQUIRE(buff, ox::writeClaw(obj, ox::ClawFormat::Metal));
 	ImGui::SetDragDropPayload(ox::ModelTypeName_v<T>, buff.data(), buff.size());
 	return {};
@@ -77,7 +77,7 @@ class DragDropSource {
 		}
 };
 
-auto dragDropSource(auto const&cb, ImGuiDragDropFlags const flags = 0) noexcept {
+auto dragDropSource(auto const &cb, ImGuiDragDropFlags const flags = 0) noexcept {
 	if constexpr(ox::is_same_v<decltype(cb()), ox::Error>) {
 		if (ig::DragDropSource const tgt{flags}; tgt) [[unlikely]] {
 			return cb();
@@ -108,7 +108,7 @@ class DragDropTarget {
 		}
 };
 
-auto dragDropTarget(auto const&cb) noexcept {
+auto dragDropTarget(auto const &cb) noexcept {
 	if constexpr(ox::is_same_v<decltype(cb()), ox::Error>) {
 		if (ig::DragDropTarget const tgt; tgt) [[unlikely]] {
 			return cb();
@@ -124,7 +124,7 @@ auto dragDropTarget(auto const&cb) noexcept {
 
 class ChildStackItem {
 	public:
-		explicit ChildStackItem(ox::CStringViewCR id, ImVec2 const&sz = {}) noexcept;
+		explicit ChildStackItem(ox::CStringViewCR id, ImVec2 const &sz = {}) noexcept;
 		~ChildStackItem() noexcept;
 };
 
@@ -146,7 +146,7 @@ class IndentStackItem {
 
 void centerNextWindow(turbine::Context &ctx) noexcept;
 
-bool PushButton(ox::CStringViewCR lbl, ImVec2 const&btnSz = BtnSz) noexcept;
+bool PushButton(ox::CStringViewCR lbl, ImVec2 const &btnSz = BtnSz) noexcept;
 
 template<typename Str>
 struct TextInput {
@@ -234,7 +234,7 @@ PopupResponse PopupControlsOk(
 	ox::CStringViewCR ok);
 
 [[nodiscard]]
-bool BeginPopup(turbine::Context &ctx, ox::CStringViewCR popupName, bool &show, ImVec2 const&sz = {285, 0});
+bool BeginPopup(turbine::Context &ctx, ox::CStringViewCR popupName, bool &show, ImVec2 const &sz = {285, 0});
 
 /**
  *
@@ -266,7 +266,7 @@ bool ComboBox(ox::CStringView lbl, ox::Span<const ox::String> list, size_t &sele
  */
 bool ComboBox(
 		ox::CStringViewCR lbl,
-		std::function<ox::CStringView(size_t)> const&f,
+		std::function<ox::CStringView(size_t)> const &f,
 		size_t strCnt,
 		size_t &selectedIdx) noexcept;
 
@@ -278,10 +278,10 @@ bool FileComboBox(
 
 bool ListBox(
 		ox::CStringViewCR name,
-		std::function<ox::CStringView(size_t)> const&f,
+		std::function<ox::CStringView(size_t)> const &f,
 		size_t strCnt,
 		size_t &selIdx,
-		ImVec2 const&sz = {0, 0}) noexcept;
+		ImVec2 const &sz = {0, 0}) noexcept;
 
 /**
  *
@@ -290,7 +290,7 @@ bool ListBox(
  * @param selIdx
  * @return true if new value selected, false otherwise
  */
-bool ListBox(ox::CStringViewCR name, ox::SpanView<ox::String> const&list, size_t &selIdx) noexcept;
+bool ListBox(ox::CStringViewCR name, ox::SpanView<ox::String> const &list, size_t &selIdx) noexcept;
 
 class FilePicker {
 	private:
@@ -306,7 +306,7 @@ class FilePicker {
 				studio::Context &sctx,
 				ox::StringParam title,
 				ox::StringParam fileExt,
-				ImVec2 const&size = {}) noexcept;
+				ImVec2 const &size = {}) noexcept;
 
 		void draw() noexcept;
 
@@ -348,6 +348,8 @@ class QuestionPopup: public Popup {
 
 		QuestionPopup(ox::StringParam title, ox::StringParam question) noexcept;
 
+		void setQuestion(ox::StringParam msg) noexcept;
+
 		void draw(Context &ctx) noexcept override;
 
 };

src/olympic/studio/modlib/include/studio/itemmaker.hpp

@@ -109,7 +109,7 @@ class ItemMaker {
 			return m_typeDisplayName;
 		}
 
-		bool installTemplate(ox::UPtr<ItemTemplate> &tmpl) {
+		bool installTemplate(ox::UPtr<ItemTemplate> &&tmpl) {
 			if (typeName() == tmpl->typeName() &&
 			    typeVersion() <= tmpl->typeVersion()) {
                 m_templates.emplace_back(std::move(tmpl));
@@ -120,10 +120,6 @@ class ItemMaker {
 			return false;
 		}
 
-		bool installTemplate(ox::UPtr<ItemTemplate> &&tmpl) {
-			return installTemplate(tmpl);
-		}
-
 		constexpr ox::Vector<ox::UPtr<ItemTemplate>> const&itemTemplates() const noexcept {
 			return m_templates;
 		}

src/olympic/studio/modlib/src/CMakeLists.txt

@@ -1,6 +1,7 @@
 add_library(
 	Studio
 		configio.cpp
+		context.cpp
 		editor.cpp
 		filepickerpopup.cpp
 		filetreemodel.cpp

src/olympic/studio/modlib/src/configio.cpp

@@ -23,7 +23,7 @@ constexpr auto ConfigDir = [] {
 	}
 }();
 
-ox::String configPath(keel::Context const&ctx) noexcept {
+ox::String configPath(keel::Context const &ctx) noexcept {
 	auto const homeDir = std::getenv(ox::defines::OS == ox::OS::Windows ? "USERPROFILE" : "HOME");
 	return ox::sfmt(ConfigDir, homeDir, ctx.appName);
 }

src/olympic/studio/modlib/src/context.cpp

@@ -0,0 +1,69 @@
+/*
+ * Copyright 2016 - 2025 Gary Talent (gary@drinkingtea.net). All rights reserved.
+ */
+
+#include <studio/context.hpp>
+
+namespace studio {
+
+void navigateTo(Context &ctx, ox::StringParam filePath, ox::StringParam navArgs) noexcept {
+	ox::String path = std::move(filePath);
+	if (beginsWith(path, "uuid://")) {
+		auto const [p, err] = keel::uuidUrlToPath(keelCtx(ctx), path);
+		if (err) {
+			return;
+		}
+		path = p;
+	}
+	ctx.navStack.resize(ctx.navIdx + 1);
+	ctx.navStack.emplace_back(ox::String{path}, ox::String{navArgs.view()});
+	try {
+		ctx.navCallback(std::move(path), std::move(navArgs));
+	} catch (std::exception const &e) {
+		oxErrf("Nav error: {}", e.what());
+		oxAssert(false, "Nav error");
+	}
+}
+
+void navigateBack(Context &ctx) noexcept {
+	if (!ctx.navIdx) {
+		return;
+	}
+	--ctx.navIdx;
+	while (ctx.navIdx < ctx.navStack.size() && ctx.navIdx) {
+		auto const i = ctx.navIdx - 1;
+		auto const &n = ctx.navStack[i];
+		if (!ctx.project->exists(n.filePath)) {
+			std::ignore = ctx.navStack.erase(i);
+			--ctx.navIdx;
+			continue;
+		}
+		try {
+			ctx.navCallback(n.filePath, n.navArgs);
+		} catch (std::exception const &e) {
+			oxAssert(ctx.navCallback != nullptr, "navCallback is null");
+			oxErrf("navigateForward failed: {}", e.what());
+		}
+		break;
+	}
+}
+
+void navigateForward(Context &ctx) noexcept {
+	while (ctx.navIdx < ctx.navStack.size()) {
+		auto const &n = ctx.navStack[ctx.navIdx];
+		try {
+			ctx.navCallback(n.filePath, n.navArgs);
+		} catch (std::exception const &e) {
+			oxAssert(ctx.navCallback != nullptr, "navCallback is null");
+			oxErrf("navigateForward failed: {}", e.what());
+		}
+		if (!ctx.project->exists(n.filePath)) {
+			std::ignore = ctx.navStack.erase(ctx.navIdx);
+			continue;
+		}
+		++ctx.navIdx;
+		break;
+	}
+}
+
+}

src/olympic/studio/modlib/src/editor.cpp

@@ -72,8 +72,10 @@ bool BaseEditor::exportable() const noexcept {
 }
 
 void BaseEditor::setCutEnabled(bool v) {
-	m_cutEnabled = v;
-	cutEnabledChanged.emit(v);
+	if (m_cutEnabled != v) {
+		m_cutEnabled = v;
+		cutEnabledChanged.emit(v);
+	}
 }
 
 bool BaseEditor::cutEnabled() const noexcept {
@@ -81,8 +83,10 @@ bool BaseEditor::cutEnabled() const noexcept {
 }
 
 void BaseEditor::setCopyEnabled(bool v) {
-	m_copyEnabled = v;
-	copyEnabledChanged.emit(v);
+	if (m_copyEnabled != v) {
+		m_copyEnabled = v;
+		copyEnabledChanged.emit(v);
+	}
 }
 
 bool BaseEditor::copyEnabled() const noexcept {
@@ -90,8 +94,10 @@ bool BaseEditor::copyEnabled() const noexcept {
 }
 
 void BaseEditor::setPasteEnabled(bool v) {
-	m_pasteEnabled = v;
-	pasteEnabledChanged.emit(v);
+	if (m_pasteEnabled != v) {
+		m_pasteEnabled = v;
+		pasteEnabledChanged.emit(v);
+	}
 }
 
 bool BaseEditor::pasteEnabled() const noexcept {

src/olympic/studio/modlib/src/filepickerpopup.cpp

@@ -8,6 +8,15 @@
 
 namespace studio {
 
+FilePickerPopup::Explorer::Explorer(keel::Context &kctx):
+	FileExplorer{kctx} {
+}
+
+void FilePickerPopup::Explorer::fileOpened(ox::StringViewCR) const noexcept {
+	opened = true;
+}
+
+
 FilePickerPopup::FilePickerPopup(
 	ox::StringParam name,
 	keel::Context &kctx,
@@ -41,6 +50,7 @@ void FilePickerPopup::refresh() noexcept {
 void FilePickerPopup::open() noexcept {
 	refresh();
 	m_open = true;
+	m_explorer.opened = false;
 }
 
 void FilePickerPopup::close() noexcept {
@@ -60,16 +70,22 @@ ox::Optional<ox::String> FilePickerPopup::draw(Context &ctx) noexcept {
 	if (ig::BeginPopup(ctx.tctx, m_name, m_open, {380, 340})) {
 		auto const vp = ImGui::GetContentRegionAvail();
 		m_explorer.draw(ctx, {vp.x, vp.y - 30});
-		if (ig::PopupControlsOkCancel(m_open) == ig::PopupResponse::OK) {
-			auto p = m_explorer.selectedPath();
-			if (p) {
-				out.emplace(*p);
-			}
-			close();
+		if (ig::PopupControlsOkCancel(m_open) == ig::PopupResponse::OK || m_explorer.opened) {
+			out = handlePick();
 		}
 		ImGui::EndPopup();
 	}
 	return out;
 }
 
+ox::Optional<ox::String> FilePickerPopup::handlePick() noexcept {
+	ox::Optional<ox::String> out;
+	auto p = m_explorer.selectedPath();
+	if (p) {
+		out.emplace(*p);
+	}
+	close();
+	return out;
+}
+
 }

src/olympic/studio/modlib/src/imguiutil.cpp

@@ -10,7 +10,7 @@
 
 namespace studio::ig {
 
-ChildStackItem::ChildStackItem(ox::CStringViewCR id, ImVec2 const&sz) noexcept {
+ChildStackItem::ChildStackItem(ox::CStringViewCR id, ImVec2 const &sz) noexcept {
 	ImGui::BeginChild(id.c_str(), sz);
 }
 
@@ -50,7 +50,7 @@ void centerNextWindow(turbine::Context &ctx) noexcept {
 	ImGui::SetNextWindowPos(ImVec2(screenW / mod, screenH / mod), ImGuiCond_Always, ImVec2(0.5f, 0.5f));
 }
 
-bool PushButton(ox::CStringViewCR lbl, ImVec2 const&btnSz) noexcept {
+bool PushButton(ox::CStringViewCR lbl, ImVec2 const &btnSz) noexcept {
 	return ImGui::Button(lbl.c_str(), btnSz);
 }
 
@@ -101,7 +101,7 @@ PopupResponse PopupControlsOk(
 	return out;
 }
 
-bool BeginPopup(turbine::Context &ctx, ox::CStringViewCR popupName, bool &show, ImVec2 const&sz) {
+bool BeginPopup(turbine::Context &ctx, ox::CStringViewCR popupName, bool &show, ImVec2 const &sz) {
 	constexpr auto modalFlags = ImGuiWindowFlags_NoCollapse | ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoResize;
 	centerNextWindow(ctx);
 	ImGui::OpenPopup(popupName.c_str());
@@ -149,7 +149,7 @@ bool ComboBox(
 
 bool ComboBox(
 		ox::CStringViewCR lbl,
-		std::function<ox::CStringView(size_t)> const&f,
+		std::function<ox::CStringView(size_t)> const &f,
 		size_t strCnt,
 		size_t &selectedIdx) noexcept {
 	bool out{};
@@ -172,16 +172,16 @@ bool FileComboBox(
 		Context &sctx,
 		ox::StringViewCR fileExt,
 		size_t &selectedIdx) noexcept {
-	auto const&list = sctx.project->fileList(fileExt);
+	auto const &list = sctx.project->fileList(fileExt);
 	return ComboBox(lbl, list, selectedIdx);
 }
 
 bool ListBox(
 		ox::CStringViewCR name,
-		std::function<ox::CStringView(size_t)> const&f,
+		std::function<ox::CStringView(size_t)> const &f,
 		size_t const strCnt,
 		size_t &selIdx,
-		ImVec2 const&sz) noexcept {
+		ImVec2 const &sz) noexcept {
 	auto out = false;
 	if (ImGui::BeginListBox(name.c_str(), sz)) {
 		for (size_t i = 0; i < strCnt; ++i) {
@@ -199,13 +199,13 @@ bool ListBox(
 	return out;
 }
 
-bool ListBox(ox::CStringViewCR name, ox::SpanView<ox::String> const&list, size_t &selIdx) noexcept {
+bool ListBox(ox::CStringViewCR name, ox::SpanView<ox::String> const &list, size_t &selIdx) noexcept {
 	return ListBox(name, [list](size_t i) -> ox::CStringView {
 		return list[i];
 	}, list.size(), selIdx);
 }
 
-bool ListBox(ox::CStringViewCR name, ox::SpanView<ox::CStringView> const&list, size_t &selIdx) noexcept {
+bool ListBox(ox::CStringViewCR name, ox::SpanView<ox::CStringView> const &list, size_t &selIdx) noexcept {
 	return ListBox(name, [list](size_t i) -> ox::CStringView {
 		return list[i];
 	}, list.size(), selIdx);
@@ -216,7 +216,7 @@ FilePicker::FilePicker(
 		Context &sctx,
 		ox::StringParam title,
 		ox::StringParam fileExt,
-		ImVec2 const&size) noexcept:
+		ImVec2 const &size) noexcept:
 	m_sctx(sctx),
 	m_title(std::move(title)),
 	m_fileExt(std::move(fileExt)),
@@ -230,7 +230,7 @@ void FilePicker::draw() noexcept {
 	auto constexpr popupSz = ImVec2{450.f, 0};
 	IDStackItem const idStackItem(m_title);
 	if (BeginPopup(m_sctx.tctx, m_title, m_show, popupSz)) {
-		auto const&list = m_sctx.project->fileList(m_fileExt);
+		auto const &list = m_sctx.project->fileList(m_fileExt);
 		size_t selIdx{};
 		ComboBox(m_title, list, selIdx);
 		if (PopupControlsOkCancel(popupSz.x, m_show) == ig::PopupResponse::OK) {
@@ -267,6 +267,10 @@ QuestionPopup::QuestionPopup(ox::StringParam title, ox::StringParam question) no
 	m_question{std::move(question)} {
 }
 
+void QuestionPopup::setQuestion(ox::StringParam msg) noexcept {
+	m_question = std::move(msg);
+}
+
 void QuestionPopup::draw(Context &ctx) noexcept {
 	switch (m_stage) {
 		case Stage::Closed:
@@ -275,6 +279,9 @@ void QuestionPopup::draw(Context &ctx) noexcept {
 			ImGui::OpenPopup(m_title.c_str());
 			m_stage = Stage::Open;
 			m_open = true;
+			// require extended refresh in case new contents require resize
+			// this can take around a second
+			turbine::requireRefreshFor(ctx.tctx, 1000);
 		[[fallthrough]];
 		case Stage::Open:
 			centerNextWindow(ctx.tctx);

src/olympic/studio/modlib/src/project.cpp

@@ -101,8 +101,8 @@ ox::Result<ox::FileStat> Project::stat(ox::StringViewCR path) const noexcept {
 ox::Error Project::copyItem(ox::StringViewCR src, ox::StringViewCR dest) noexcept {
 	OX_REQUIRE_M(buff, loadBuff(src));
 	OX_REQUIRE(id, keel::regenerateUuidHeader(buff));
-	OX_RETURN_ERROR(writeBuff(dest, buff));
 	createUuidMapping(m_kctx, dest, id);
+	OX_RETURN_ERROR(writeBuff(dest, ox::BufferView{buff} + keel::K1HdrSz));
 	return {};
 }
 

src/olympic/turbine/include/turbine/gfx.hpp

@@ -49,6 +49,19 @@ ox::Error setWindowBounds(Context &ctx, ox::Bounds const&bnds) noexcept;
  * @param ctx - Context
  * @param ms - milliseconds
  */
-void setRefreshWithin(Context &ctx, int ms) noexcept;
+void requireRefreshWithin(Context &ctx, int ms) noexcept;
+
+/**
+ * Stimulates screen to draw for a period of a short period of
+ * time (168 ms on GLFW implementation).
+ * @param ctx - Context
+ */
+void requireRefresh(Context &ctx) noexcept;
+
+/**
+ * Stimulates screen to draw for a specified period of time.
+ * @param ctx - Context
+ */
+void requireRefreshFor(Context &ctx, int ms) noexcept;
 
 }

src/olympic/turbine/include/turbine/turbine.hpp

@@ -79,11 +79,14 @@ enum Key {
 };
 
 using KeyEventHandler = void(*)(Context&, Key, bool);
+using MouseButtonEventHandler = void(*)(Context&, int btn, bool);
 
 void setKeyEventHandler(Context &ctx, KeyEventHandler h) noexcept;
 
+void setMouseButtonEventHandler(Context &ctx, MouseButtonEventHandler h) noexcept;
+
 [[nodiscard]]
-KeyEventHandler keyEventHandler(Context &ctx) noexcept;
+KeyEventHandler keyEventHandler(Context const &ctx) noexcept;
 
 [[nodiscard]]
 bool buttonDown(Context const&ctx, Key) noexcept;

src/olympic/turbine/src/gba/turbine.cpp

@@ -133,7 +133,9 @@ void setKeyEventHandler(Context &ctx, KeyEventHandler h) noexcept {
 	ctx.keyEventHandler = h;
 }
 
-KeyEventHandler keyEventHandler(Context &ctx) noexcept {
+void setMouseButtonEventHandler(Context&, MouseButtonEventHandler) noexcept {}
+
+KeyEventHandler keyEventHandler(Context const &ctx) noexcept {
 	return ctx.keyEventHandler;
 }
 

src/olympic/turbine/src/glfw/context.hpp

@@ -16,6 +16,7 @@ class Context {
 		UpdateHandler updateHandler = [](Context&) -> int {return -1;};
 		keel::Context keelCtx;
 		KeyEventHandler keyEventHandler = nullptr;
+		MouseButtonEventHandler mouseButtonEventHandler = nullptr;
 		ox::AnyPtr applicationData;
 
 		// GLFW impl data ////////////////////////////////////////////////////////

src/olympic/turbine/src/glfw/turbine.cpp

@@ -155,6 +155,10 @@ static ox::Result<IconData> toGlfwImgPixels(ox::SpanView<uint8_t> const &iconPng
 	return out;
 }
 
+static void setMandatoryRefreshPeriod(Context &ctx, TimeMs const newVal) {
+	ctx.mandatoryRefreshPeriodEnd = ox::max(ctx.mandatoryRefreshPeriodEnd, newVal);
+}
+
 ox::Error setWindowIcon(Context &ctx, ox::SpanView<ox::SpanView<uint8_t>> const &iconPngs) noexcept {
 	if constexpr(ox::defines::OS != ox::OS::Darwin) {
 		ox::Vector<IconData, 8> src;
@@ -216,10 +220,19 @@ ox::Error setWindowBounds(Context &ctx, ox::Bounds const&bnds) noexcept {
 	return {};
 }
 
-void setRefreshWithin(Context &ctx, int ms) noexcept {
+void requireRefreshWithin(Context &ctx, int const ms) noexcept {
 	ctx.refreshWithinMs = ox::min(ms, ctx.refreshWithinMs);
 }
 
+void requireRefresh(Context &ctx) noexcept {
+	setMandatoryRefreshPeriod(ctx, ticksMs(ctx) + config::MandatoryRefreshPeriod);
+}
+
+void requireRefreshFor(Context &ctx, int ms) noexcept {
+	ms = ox::max(0, ms);
+	setMandatoryRefreshPeriod(ctx, ticksMs(ctx) + static_cast<TimeMs>(ms));
+}
+
 static void draw(Context &ctx) noexcept {
 	// draw start
 #if TURBINE_USE_IMGUI
@@ -286,14 +299,19 @@ static void handleKeyPress(Context &ctx, int const key, bool const down) noexcep
 static void handleGlfwCursorPosEvent(GLFWwindow*, double, double) noexcept {
 }
 
-static void handleGlfwMouseButtonEvent(GLFWwindow *window, int, int, int) noexcept {
+static void handleGlfwMouseButtonEvent(
+	GLFWwindow *window,
+	int const btn,
+	int const action,
+	int) noexcept {
 	auto &ctx = *static_cast<Context*>(glfwGetWindowUserPointer(window));
-	ctx.mandatoryRefreshPeriodEnd = ticksMs(ctx) + config::MandatoryRefreshPeriod;
+	setMandatoryRefreshPeriod(ctx, ticksMs(ctx) + config::MandatoryRefreshPeriod);
+	ctx.mouseButtonEventHandler(ctx, btn, action == 1);
 }
 
 static void handleGlfwKeyEvent(GLFWwindow *window, int const key, int, int const action, int) noexcept {
 	auto &ctx = *static_cast<Context*>(glfwGetWindowUserPointer(window));
-	ctx.mandatoryRefreshPeriodEnd = ticksMs(ctx) + config::MandatoryRefreshPeriod;
+	setMandatoryRefreshPeriod(ctx, ticksMs(ctx) + config::MandatoryRefreshPeriod);
 	if (action == GLFW_PRESS) {
 		handleKeyPress(ctx, key, true);
 	} else if (action == GLFW_RELEASE) {
@@ -303,7 +321,7 @@ static void handleGlfwKeyEvent(GLFWwindow *window, int const key, int, int const
 
 static void handleGlfwWindowCloseEvent(GLFWwindow *window) noexcept {
 	auto &ctx = *static_cast<Context*>(glfwGetWindowUserPointer(window));
-	ctx.mandatoryRefreshPeriodEnd = ticksMs(ctx) + config::MandatoryRefreshPeriod;
+	setMandatoryRefreshPeriod(ctx, ticksMs(ctx) + config::MandatoryRefreshPeriod);
 	ctx.running = ctx.shutdownHandler ? !ctx.shutdownHandler(ctx) : false;
 	glfwSetWindowShouldClose(window, !ctx.running);
 	glfwPostEmptyEvent();
@@ -316,7 +334,7 @@ ox::Result<ox::UPtr<Context>> init(
 	using namespace std::chrono;
 	ctx->startTime = static_cast<TimeMs>(
 			duration_cast<milliseconds>(system_clock::now().time_since_epoch()).count());
-	ctx->mandatoryRefreshPeriodEnd = ticksMs(*ctx) + config::MandatoryRefreshPeriod;
+	setMandatoryRefreshPeriod(*ctx, ticksMs(*ctx) + config::MandatoryRefreshPeriod);
 	// init GLFW context
 	glfwInit();
 	glfwSetErrorCallback(handleGlfwError);
@@ -326,7 +344,8 @@ ox::Result<ox::UPtr<Context>> init(
 	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GLFW_TRUE);
 	glfwWindowHint(GLFW_RESIZABLE, GLFW_TRUE);
 	constexpr auto Scale = 5;
-	ctx->window = glfwCreateWindow(240 * Scale, 160 * Scale, ctx->keelCtx.appName.c_str(), nullptr, nullptr);
+	ctx->window = glfwCreateWindow(
+		240 * Scale, 160 * Scale, ctx->keelCtx.appName.c_str(), nullptr, nullptr);
 	//ctx.window = glfwCreateWindow(876, 743, ctx.keelCtx.appName.c_str(), nullptr, nullptr);
 	if (ctx->window == nullptr) {
 		return ox::Error(1, "Could not open GLFW window");
@@ -389,14 +408,14 @@ ox::Error run(Context &ctx) noexcept {
 		glfwPollEvents();
 		auto const ticks = ticksMs(ctx);
 		if (ctx.wakeupTime <= ticks) {
-			 auto const st = ctx.updateHandler(ctx);
-			 if (st >= 0) {
-				  ctx.wakeupTime = ticks + static_cast<unsigned>(st);
-				  sleepTime = static_cast<uint64_t>(st);
-			 } else {
-				  ctx.wakeupTime = ~uint64_t{0};
-				  sleepTime = ctx.wakeupTime - ticks;
-			 }
+			auto const st = ctx.updateHandler(ctx);
+			if (st >= 0) {
+				ctx.wakeupTime = ticks + static_cast<unsigned>(st);
+				sleepTime = static_cast<uint64_t>(st);
+			} else {
+				ctx.wakeupTime = ~uint64_t{0};
+				sleepTime = ctx.wakeupTime - ticks;
+			}
 		} else {
 			sleepTime = ctx.wakeupTime - ticks;
 		}
@@ -434,15 +453,19 @@ void setShutdownHandler(Context &ctx, ShutdownHandler const handler) noexcept {
 	ctx.shutdownHandler = handler;
 }
 
-void setUpdateHandler(Context &ctx, UpdateHandler h) noexcept {
+void setUpdateHandler(Context &ctx, UpdateHandler const h) noexcept {
 	ctx.updateHandler = h;
 }
 
-void setKeyEventHandler(Context &ctx, KeyEventHandler h) noexcept {
+void setKeyEventHandler(Context &ctx, KeyEventHandler const h) noexcept {
 	ctx.keyEventHandler = h;
 }
 
-KeyEventHandler keyEventHandler(Context &ctx) noexcept {
+void setMouseButtonEventHandler(Context &ctx, MouseButtonEventHandler const h) noexcept {
+	ctx.mouseButtonEventHandler = h;
+}
+
+KeyEventHandler keyEventHandler(Context const &ctx) noexcept {
 	return ctx.keyEventHandler;
 }
 

util/scripts/loc.py

@@ -0,0 +1,59 @@
+#! /usr/bin/env python3
+
+from pathlib import Path
+import argparse
+
+def parse_args():
+    parser = argparse.ArgumentParser(description="Count and sort lines of code in selected files.")
+    parser.add_argument(
+        "--search-dirs", nargs="+", required=True,
+        help="List of directories to search (recursively)."
+    )
+    parser.add_argument(
+        "--include-exts", nargs="+", required=True,
+        help="List of file extensions to include (e.g. .cpp .hpp .py)"
+    )
+    parser.add_argument(
+        "--exclude-paths", nargs="*", default=[],
+        help="Full file paths to exclude from counting."
+    )
+    return parser.parse_args()
+
+
+def main():
+    args = parse_args()
+    include_exts = tuple(args.include_exts)
+    exclude_paths = {Path(p).resolve() for p in args.exclude_paths}
+    files = []
+    for base in args.search_dirs:
+        path = Path(base)
+        if path.is_dir():
+            for file in path.rglob("*"):
+                try:
+                    resolved_file = file.resolve()
+                    if (
+                        file.is_file()
+                        and file.name.endswith(include_exts)
+                        and resolved_file not in exclude_paths
+                    ):
+                        files.append(str(resolved_file))
+                except FileNotFoundError:
+                    continue
+    line_counts = []
+    total_lines = 0
+    for f in files:
+        try:
+            with open(f, "r", encoding="utf-8", errors="ignore") as file:
+                lines = sum(1 for _ in file)
+            line_counts.append((lines, f))
+            total_lines += lines
+        except Exception as e:
+            print(f"Failed to read {f}: {e}")
+    line_counts.sort()
+    for count, filename in line_counts:
+        print(f"{count:>7} {filename}")
+    print(f"{total_lines:>7} total")
+
+
+if __name__ == "__main__":
+    main()