[nostalgia] Update release notes

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;

release-notes.md

@@ -1,15 +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
-* PaletteEditor: Make RGB key shortcuts work when color channel inputs are
-  focused
-
-# d2025.05.2
-
-* TileSheetEditor: Fix manual redo of draw actions, fix drawing to pixel 0, 0 as first action (cce5f52f96511694afd98f0b9b6b1f19c06ecd20)
-* TileSheetEditor: Fix draw command to work on same pixel after switching subsheets (514cb978351ee4b0a5335c22a506a6d9f608f0a7)
 
 # d2025.05.1
 

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/tilesheeteditor-imgui.cpp

@@ -192,6 +192,9 @@ 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)) {
@@ -276,7 +279,7 @@ void TileSheetEditorImGui::draw(studio::Context&) noexcept {
 				auto insertOnIdx = m_model.activeSubSheetIdx();
 				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();

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

@@ -315,6 +315,10 @@ 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;
 }

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

@@ -118,6 +118,9 @@ class TileSheetEditorModel final: public ox::SignalHandler {
 
 		void clearSelection() noexcept;
 
+		[[nodiscard]]
+		bool hasSelection() const noexcept;
+
 		[[nodiscard]]
 		bool updated() const 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/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;
 
@@ -43,6 +48,7 @@ static ox::Error runApp(
 	oxLogError(turbine::setWindowIcon(*ctx, WindowIcons()));
 	turbine::setWindowTitle(*ctx, keelCtx(*ctx).appName);
 	turbine::setKeyEventHandler(*ctx, keyEventHandler);
+	turbine::setMouseButtonEventHandler(*ctx, mouseButtonEventHandler);
 	turbine::requireRefreshWithin(*ctx, 0);
 	StudioUI ui(*ctx, projectDataDir);
 	StudioUIDrawer drawer(ui);

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/studioui.cpp

@@ -34,18 +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;
 }
@@ -147,6 +135,9 @@ StudioUI::StudioUI(turbine::Context &tctx, ox::StringParam projectDataDir) noexc
 	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);
@@ -186,7 +177,17 @@ 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));
 }
 
@@ -270,7 +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());
@@ -310,6 +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();
@@ -353,6 +367,13 @@ void StudioUI::drawTabs() noexcept {
 				}
 				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());
@@ -395,9 +416,10 @@ void StudioUI::drawTabs() noexcept {
 		m_closeActiveTab = false;
 	}
 	if (m_navAction) {
-		oxLogError(openFile(m_navAction->path));
+		if (!openFile(m_navAction->path)) {
-		m_activeEditor->navigateTo(m_navAction->args);
+			m_activeEditor->navigateTo(m_navAction->args);
-		m_navAction.reset();
+			m_navAction.reset();
+		}
 	}
 }
 
@@ -416,7 +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));
 	}
 }
 
@@ -506,6 +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);
+			}
+		}
 	}
 }
 
@@ -611,6 +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);
@@ -664,7 +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) {

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

@@ -87,7 +87,9 @@ class StudioUI final: public ox::SignalHandler {
 
 		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 {

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

@@ -16,11 +16,21 @@ class StudioUI;
 
 struct Context {
 	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} {}
 };
@@ -37,4 +47,8 @@ inline keel::Context const &keelCtx(Context const &ctx) noexcept {
 
 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/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;
+	if (m_cutEnabled != v) {
-	cutEnabledChanged.emit(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;
+	if (m_copyEnabled != v) {
-	copyEnabledChanged.emit(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;
+	if (m_pasteEnabled != v) {
-	pasteEnabledChanged.emit(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) {
+		if (ig::PopupControlsOkCancel(m_open) == ig::PopupResponse::OK || m_explorer.opened) {
-			auto p = m_explorer.selectedPath();
+			out = handlePick();
-			if (p) {
-				out.emplace(*p);
-			}
-			close();
 		}
 		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:

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/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

@@ -299,9 +299,14 @@ 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));
 	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 {
@@ -339,7 +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");
@@ -402,14 +408,14 @@ ox::Error run(Context &ctx) noexcept {
 		glfwPollEvents();
 		auto const ticks = ticksMs(ctx);
 		if (ctx.wakeupTime <= ticks) {
-			 auto const st = ctx.updateHandler(ctx);
+			auto const st = ctx.updateHandler(ctx);
-			 if (st >= 0) {
+			if (st >= 0) {
-				  ctx.wakeupTime = ticks + static_cast<unsigned>(st);
+				ctx.wakeupTime = ticks + static_cast<unsigned>(st);
-				  sleepTime = static_cast<uint64_t>(st);
+				sleepTime = static_cast<uint64_t>(st);
-			 } else {
+			} else {
-				  ctx.wakeupTime = ~uint64_t{0};
+				ctx.wakeupTime = ~uint64_t{0};
-				  sleepTime = ctx.wakeupTime - ticks;
+				sleepTime = ctx.wakeupTime - ticks;
-			 }
+			}
 		} else {
 			sleepTime = ctx.wakeupTime - ticks;
 		}
@@ -447,15 +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;
 }