diff --git a/cocoa/utility.cpp b/cocoa/utility.cpp
index cc35dbd..f8de5bb 100644
--- a/cocoa/utility.cpp
+++ b/cocoa/utility.cpp
@@ -33,8 +33,8 @@ auto DropPathsOperation(id<NSDraggingInfo> sender) -> NSDragOperation {
   return NSDragOperationNone;
 }
 
-auto DropPaths(id<NSDraggingInfo> sender) -> lstring {
-  lstring paths;
+auto DropPaths(id<NSDraggingInfo> sender) -> string_vector {
+  string_vector paths;
   NSPasteboard* pboard = [sender draggingPasteboard];
   if([[pboard types] containsObject:NSFilenamesPboardType]) {
     NSArray* files = [pboard propertyListForType:NSFilenamesPboardType];
diff --git a/cocoa/widget/canvas.cpp b/cocoa/widget/canvas.cpp
index 463574f..14cd1e1 100644
--- a/cocoa/widget/canvas.cpp
+++ b/cocoa/widget/canvas.cpp
@@ -20,7 +20,7 @@
 }
 
 -(BOOL) performDragOperation:(id<NSDraggingInfo>)sender {
-  lstring paths = DropPaths(sender);
+  auto paths = DropPaths(sender);
   if(!paths) return NO;
   canvas->doDrop(paths);
   return YES;
diff --git a/cocoa/widget/viewport.cpp b/cocoa/widget/viewport.cpp
index 52fcf14..515707d 100644
--- a/cocoa/widget/viewport.cpp
+++ b/cocoa/widget/viewport.cpp
@@ -23,7 +23,7 @@
 }
 
 -(BOOL) performDragOperation:(id<NSDraggingInfo>)sender {
-  lstring paths = DropPaths(sender);
+  auto paths = DropPaths(sender);
   if(!paths) return NO;
   viewport->doDrop(paths);
   return YES;
@@ -53,8 +53,8 @@ auto pViewport::destruct() -> void {
   }
 }
 
-auto pViewport::handle() const -> uintptr {
-  return (uintptr)cocoaViewport;
+auto pViewport::handle() const -> uintptr_t {
+  return (uintptr_t)cocoaViewport;
 }
 
 auto pViewport::setDroppable(bool droppable) -> void {
diff --git a/cocoa/widget/viewport.hpp b/cocoa/widget/viewport.hpp
index 36a93ee..b9811b1 100644
--- a/cocoa/widget/viewport.hpp
+++ b/cocoa/widget/viewport.hpp
@@ -18,7 +18,7 @@ namespace hiro {
 struct pViewport : pWidget {
   Declare(Viewport, Widget)
 
-  auto handle() const -> uintptr;
+  auto handle() const -> uintptr_t;
   auto setDroppable(bool droppable) -> void;
 
   CocoaViewport* cocoaViewport = nullptr;
diff --git a/cocoa/window.cpp b/cocoa/window.cpp
index b87b00a..6b4d459 100644
--- a/cocoa/window.cpp
+++ b/cocoa/window.cpp
@@ -38,7 +38,7 @@
     [item setTarget:self];
     [rootMenu addItem:item];
 
-    string result = nall::execute("defaults", "read", "/Library/Preferences/com.apple.security", "GKAutoRearm").strip();
+    string result = nall::execute("defaults", "read", "/Library/Preferences/com.apple.security", "GKAutoRearm").output.strip();
     if(result != "0") {
       disableGatekeeperAutoRearm = [[[NSMenuItem alloc] initWithTitle:@"Disable Gatekeeper Auto-Rearm" action:@selector(menuDisableGatekeeperAutoRearm) keyEquivalent:@""] autorelease];
       [disableGatekeeperAutoRearm setTarget:self];
@@ -121,7 +121,7 @@
 }
 
 -(BOOL) performDragOperation:(id<NSDraggingInfo>)sender {
-  lstring paths = DropPaths(sender);
+  auto paths = DropPaths(sender);
   if(!paths) return NO;
   window->doDrop(paths);
   return YES;
@@ -144,7 +144,7 @@
   [alert setMessageText:@"Disable Gatekeeper Auto-Rearm"];
 
   nall::execute("sudo", "defaults", "write", "/Library/Preferences/com.apple.security", "GKAutoRearm", "-bool", "NO");
-  if(nall::execute("defaults", "read", "/Library/Preferences/com.apple.security", "GKAutoRearm").strip() == "0") {
+  if(nall::execute("defaults", "read", "/Library/Preferences/com.apple.security", "GKAutoRearm").output.strip() == "0") {
     [alert setAlertStyle:NSInformationalAlertStyle];
     [alert setInformativeText:@"Gatekeeper's automatic 30-day rearm behavior has been disabled successfully."];
     [disableGatekeeperAutoRearm setHidden:YES];
diff --git a/core/browser-window.cpp b/core/browser-window.cpp
index 584edff..a774126 100644
--- a/core/browser-window.cpp
+++ b/core/browser-window.cpp
@@ -12,7 +12,7 @@ auto BrowserWindow::save() -> string {
   return pBrowserWindow::save(state);
 }
 
-auto BrowserWindow::setFilters(const lstring& filters) -> type& {
+auto BrowserWindow::setFilters(const string_vector& filters) -> type& {
   state.filters = filters;
   return *this;
 }
diff --git a/core/core.hpp b/core/core.hpp
index d69bc08..f385df9 100644
--- a/core/core.hpp
+++ b/core/core.hpp
@@ -16,13 +16,13 @@
 
 using nall::function;
 using nall::image;
-using nall::lstring;
 using nall::maybe;
 using nall::nothing;
 using nall::set;
 using nall::shared_pointer;
 using nall::shared_pointer_weak;
 using nall::string;
+using nall::string_vector;
 using nall::vector;
 
 namespace hiro {
@@ -477,14 +477,14 @@ struct BrowserWindow {
   auto directory() -> string;
   auto open() -> string;
   auto save() -> string;
-  auto setFilters(const lstring& filters = {"*"}) -> type&;
+  auto setFilters(const string_vector& filters = {"*"}) -> type&;
   auto setParent(sWindow parent) -> type&;
   auto setPath(const string& path = "") -> type&;
   auto setTitle(const string& title = "") -> type&;
 
 //private:
   struct State {
-    lstring filters;
+    string_vector filters;
     sWindow parent;
     string path;
     string title;
@@ -667,7 +667,7 @@ struct mWindow : mObject {
   auto append(sStatusBar statusBar) -> type&;
   auto backgroundColor() const -> Color;
   auto doClose() const -> void;
-  auto doDrop(lstring) const -> void;
+  auto doDrop(string_vector) const -> void;
   auto doKeyPress(signed) const -> void;
   auto doKeyRelease(signed) const -> void;
   auto doMove() const -> void;
@@ -680,7 +680,7 @@ struct mWindow : mObject {
   auto menuBar() const -> MenuBar;
   auto modal() const -> bool;
   auto onClose(const function<void ()>& callback = {}) -> type&;
-  auto onDrop(const function<void (lstring)>& callback = {}) -> type&;
+  auto onDrop(const function<void (string_vector)>& callback = {}) -> type&;
   auto onKeyPress(const function<void (signed)>& callback = {}) -> type&;
   auto onKeyRelease(const function<void (signed)>& callback = {}) -> type&;
   auto onMove(const function<void ()>& callback = {}) -> type&;
@@ -717,7 +717,7 @@ struct mWindow : mObject {
     sMenuBar menuBar;
     bool modal = false;
     function<void ()> onClose;
-    function<void (lstring)> onDrop;
+    function<void (string_vector)> onDrop;
     function<void (signed)> onKeyPress;
     function<void (signed)> onKeyRelease;
     function<void ()> onMove;
@@ -989,14 +989,14 @@ struct mCanvas : mWidget {
   auto color() const -> Color;
   auto data() -> uint32_t*;
   auto droppable() const -> bool;
-  auto doDrop(lstring names) const -> void;
+  auto doDrop(string_vector names) const -> void;
   auto doMouseLeave() const -> void;
   auto doMouseMove(Position position) const -> void;
   auto doMousePress(Mouse::Button button) const -> void;
   auto doMouseRelease(Mouse::Button button) const -> void;
   auto gradient() const -> Gradient;
   auto icon() const -> image;
-  auto onDrop(const function<void (lstring)>& callback = {}) -> type&;
+  auto onDrop(const function<void (string_vector)>& callback = {}) -> type&;
   auto onMouseLeave(const function<void ()>& callback = {}) -> type&;
   auto onMouseMove(const function<void (Position)>& callback = {}) -> type&;
   auto onMousePress(const function<void (Mouse::Button)>& callback = {}) -> type&;
@@ -1015,7 +1015,7 @@ struct mCanvas : mWidget {
     bool droppable = false;
     Gradient gradient;
     image icon;
-    function<void (lstring)> onDrop;
+    function<void (string_vector)> onDrop;
     function<void ()> onMouseLeave;
     function<void (Position)> onMouseMove;
     function<void (Mouse::Button)> onMousePress;
@@ -1944,14 +1944,14 @@ struct mVerticalSlider : mWidget {
 struct mViewport : mWidget {
   Declare(Viewport)
 
-  auto doDrop(lstring names) const -> void;
+  auto doDrop(string_vector names) const -> void;
   auto doMouseLeave() const -> void;
   auto doMouseMove(Position position) const -> void;
   auto doMousePress(Mouse::Button button) const -> void;
   auto doMouseRelease(Mouse::Button button) const -> void;
   auto droppable() const -> bool;
   auto handle() const -> uintptr_t;
-  auto onDrop(const function<void (lstring)>& callback = {}) -> type&;
+  auto onDrop(const function<void (string_vector)>& callback = {}) -> type&;
   auto onMouseLeave(const function<void ()>& callback = {}) -> type&;
   auto onMouseMove(const function<void (Position position)>& callback = {}) -> type&;
   auto onMousePress(const function<void (Mouse::Button)>& callback = {}) -> type&;
@@ -1961,7 +1961,7 @@ struct mViewport : mWidget {
 //private:
   struct State {
     bool droppable = false;
-    function<void (lstring)> onDrop;
+    function<void (string_vector)> onDrop;
     function<void ()> onMouseLeave;
     function<void (Position)> onMouseMove;
     function<void (Mouse::Button)> onMousePress;
diff --git a/core/shared.hpp b/core/shared.hpp
index 54e2d5e..6b4d28f 100644
--- a/core/shared.hpp
+++ b/core/shared.hpp
@@ -234,14 +234,14 @@ struct Canvas : sCanvas {
   auto color() const { return self().color(); }
   auto data() { return self().data(); }
   auto droppable() const { return self().droppable(); }
-  auto doDrop(lstring names) { return self().doDrop(names); }
+  auto doDrop(string_vector names) { return self().doDrop(names); }
   auto doMouseLeave() const { return self().doMouseLeave(); }
   auto doMouseMove(Position position) const { return self().doMouseMove(position); }
   auto doMousePress(Mouse::Button button) const { return self().doMousePress(button); }
   auto doMouseRelease(Mouse::Button button) const { return self().doMouseRelease(button); }
   auto gradient() const { return self().gradient(); }
   auto icon() const { return self().icon(); }
-  auto onDrop(const function<void (lstring)>& callback = {}) { return self().onDrop(callback), *this; }
+  auto onDrop(const function<void (string_vector)>& callback = {}) { return self().onDrop(callback), *this; }
   auto onMouseLeave(const function<void ()>& callback = {}) { return self().onMouseLeave(callback), *this; }
   auto onMouseMove(const function<void (Position)>& callback = {}) { return self().onMouseMove(callback), *this; }
   auto onMousePress(const function<void (Mouse::Button)>& callback = {}) { return self().onMousePress(callback), *this; }
@@ -873,14 +873,14 @@ struct Viewport : sViewport {
   DeclareSharedWidget(Viewport)
   using internalType = mViewport;
 
-  auto doDrop(lstring names) const { return self().doDrop(names); }
+  auto doDrop(string_vector names) const { return self().doDrop(names); }
   auto doMouseLeave() const { return self().doMouseLeave(); }
   auto doMouseMove(Position position) const { return self().doMouseMove(position); }
   auto doMousePress(Mouse::Button button) const { return self().doMousePress(button); }
   auto doMouseRelease(Mouse::Button button) const { return self().doMouseRelease(button); }
   auto droppable() const { return self().droppable(); }
   auto handle() const { return self().handle(); }
-  auto onDrop(const function<void (lstring)>& callback = {}) { return self().onDrop(callback), *this; }
+  auto onDrop(const function<void (string_vector)>& callback = {}) { return self().onDrop(callback), *this; }
   auto onMouseLeave(const function<void ()>& callback = {}) { return self().onMouseLeave(callback), *this; }
   auto onMouseMove(const function<void (Position)>& callback = {}) { return self().onMouseMove(callback), *this; }
   auto onMousePress(const function<void (Mouse::Button)>& callback = {}) { return self().onMousePress(callback), *this; }
@@ -937,7 +937,7 @@ struct Window : sWindow {
   auto append(sStatusBar statusBar) { return self().append(statusBar), *this; }
   auto backgroundColor() const { return self().backgroundColor(); }
   auto doClose() const { return self().doClose(); }
-  auto doDrop(lstring names) const { return self().doDrop(names); }
+  auto doDrop(string_vector names) const { return self().doDrop(names); }
   auto doKeyPress(signed key) const { return self().doKeyPress(key); }
   auto doKeyRelease(signed key) const { return self().doKeyRelease(key); }
   auto doMove() const { return self().doMove(); }
@@ -950,7 +950,7 @@ struct Window : sWindow {
   auto menuBar() const { return self().menuBar(); }
   auto modal() const { return self().modal(); }
   auto onClose(const function<void ()>& callback = {}) { return self().onClose(callback), *this; }
-  auto onDrop(const function<void (lstring)>& callback = {}) { return self().onDrop(callback), *this; }
+  auto onDrop(const function<void (string_vector)>& callback = {}) { return self().onDrop(callback), *this; }
   auto onKeyPress(const function<void (signed)>& callback = {}) { return self().onKeyPress(callback), *this; }
   auto onKeyRelease(const function<void (signed)>& callback = {}) { return self().onKeyRelease(callback), *this; }
   auto onMove(const function<void ()>& callback = {}) { return self().onMove(callback), *this; }
diff --git a/core/widget/canvas.cpp b/core/widget/canvas.cpp
index 64d8e57..4b82d65 100644
--- a/core/widget/canvas.cpp
+++ b/core/widget/canvas.cpp
@@ -18,7 +18,7 @@ auto mCanvas::droppable() const -> bool {
   return state.droppable;
 }
 
-auto mCanvas::doDrop(lstring names) const -> void {
+auto mCanvas::doDrop(string_vector names) const -> void {
   if(state.onDrop) return state.onDrop(names);
 }
 
@@ -46,7 +46,7 @@ auto mCanvas::icon() const -> image {
   return state.icon;
 }
 
-auto mCanvas::onDrop(const function<void (lstring)>& callback) -> type& {
+auto mCanvas::onDrop(const function<void (string_vector)>& callback) -> type& {
   state.onDrop = callback;
   return *this;
 }
diff --git a/core/widget/viewport.cpp b/core/widget/viewport.cpp
index 763703b..2faa881 100644
--- a/core/widget/viewport.cpp
+++ b/core/widget/viewport.cpp
@@ -6,7 +6,7 @@ auto mViewport::allocate() -> pObject* {
 
 //
 
-auto mViewport::doDrop(lstring names) const -> void {
+auto mViewport::doDrop(string_vector names) const -> void {
   if(state.onDrop) return state.onDrop(names);
 }
 
@@ -34,7 +34,7 @@ auto mViewport::handle() const -> uintptr_t {
   return signal(handle);
 }
 
-auto mViewport::onDrop(const function<void (lstring)>& callback) -> type& {
+auto mViewport::onDrop(const function<void (string_vector)>& callback) -> type& {
   state.onDrop = callback;
   return *this;
 }
diff --git a/core/window.cpp b/core/window.cpp
index 16d1b14..5229ba8 100644
--- a/core/window.cpp
+++ b/core/window.cpp
@@ -47,7 +47,7 @@ auto mWindow::doClose() const -> void {
   if(state.onClose) return state.onClose();
 }
 
-auto mWindow::doDrop(lstring names) const -> void {
+auto mWindow::doDrop(string_vector names) const -> void {
   if(state.onDrop) return state.onDrop(names);
 }
 
@@ -104,7 +104,7 @@ auto mWindow::onClose(const function<void ()>& callback) -> type& {
   return *this;
 }
 
-auto mWindow::onDrop(const function<void (lstring)>& callback) -> type& {
+auto mWindow::onDrop(const function<void (string_vector)>& callback) -> type& {
   state.onDrop = callback;
   return *this;
 }
diff --git a/extension/browser-dialog.cpp b/extension/browser-dialog.cpp
index 46eb958..7fce778 100644
--- a/extension/browser-dialog.cpp
+++ b/extension/browser-dialog.cpp
@@ -7,7 +7,7 @@ struct BrowserDialogWindow {
   auto change() -> void;
   auto isFolder(const string& name) -> bool;
   auto isMatch(const string& name) -> bool;
-  auto run() -> lstring;
+  auto run() -> string_vector;
   auto setPath(string path) -> void;
 
 private:
@@ -26,7 +26,7 @@ private:
         Button cancelButton{&controlLayout, Size{80, 0}, 5};
 
   BrowserDialog::State& state;
-  vector<lstring> filters;
+  vector<string_vector> filters;
 };
 
 //accept button clicked, or enter pressed on file name line edit
@@ -113,14 +113,14 @@ auto BrowserDialogWindow::isMatch(const string& name) -> bool {
   return false;
 }
 
-auto BrowserDialogWindow::run() -> lstring {
+auto BrowserDialogWindow::run() -> string_vector {
   state.response.reset();
 
   layout.setMargin(5);
   pathName.onActivate([&] { setPath(pathName.text()); });
   pathRefresh.setBordered(false).setIcon(Icon::Action::Refresh).onActivate([&] { setPath(state.path); });
   pathHome.setBordered(false).setIcon(Icon::Go::Home).onActivate([&] { setPath(Path::user()); });
-  pathUp.setBordered(false).setIcon(Icon::Go::Up).onActivate([&] { setPath(dirname(state.path)); });
+  pathUp.setBordered(false).setIcon(Icon::Go::Up).onActivate([&] { setPath(Location::dir(state.path)); });
   view.setBatchable(state.action == "openFiles").onActivate([&] { activate(); }).onChange([&] { change(); });
   filterList.setVisible(state.action != "selectFolder").onChange([&] { setPath(state.path); });
   for(auto& filter : state.filters) {
@@ -156,7 +156,7 @@ auto BrowserDialogWindow::run() -> lstring {
 
 auto BrowserDialogWindow::setPath(string path) -> void {
   path.transform("\\", "/");
-  if(!path.endsWith("/")) path.append("/");
+  if((path || Path::root() == "/") && !path.endsWith("/")) path.append("/");
   pathName.setText(state.path = path);
 
   view.reset();
@@ -197,7 +197,7 @@ auto BrowserDialog::openFile() -> string {
   return {};
 }
 
-auto BrowserDialog::openFiles() -> lstring {
+auto BrowserDialog::openFiles() -> string_vector {
   state.action = "openFiles";
   if(!state.title) state.title = "Open Files";
   if(auto result = _run()) return result;
@@ -225,7 +225,7 @@ auto BrowserDialog::selectFolder() -> string {
   return {};
 }
 
-auto BrowserDialog::setFilters(const lstring& filters) -> type& {
+auto BrowserDialog::setFilters(const string_vector& filters) -> type& {
   state.filters = filters;
   return *this;
 }
@@ -245,7 +245,7 @@ auto BrowserDialog::setTitle(const string& title) -> type& {
   return *this;
 }
 
-auto BrowserDialog::_run() -> lstring {
+auto BrowserDialog::_run() -> string_vector {
   if(!state.path) state.path = Path::user();
   return BrowserDialogWindow(state).run();
 }
diff --git a/extension/browser-dialog.hpp b/extension/browser-dialog.hpp
index dee0287..9d9b35c 100644
--- a/extension/browser-dialog.hpp
+++ b/extension/browser-dialog.hpp
@@ -6,12 +6,12 @@ struct BrowserDialog {
   using type = BrowserDialog;
 
   BrowserDialog();
-  auto openFile() -> string;      //one existing file
-  auto openFiles() -> lstring;    //any existing files or folders
-  auto openFolder() -> string;    //one existing folder
-  auto saveFile() -> string;      //one file
-  auto selectFolder() -> string;  //one existing folder
-  auto setFilters(const lstring& filters = {}) -> type&;
+  auto openFile() -> string;          //one existing file
+  auto openFiles() -> string_vector;  //any existing files or folders
+  auto openFolder() -> string;        //one existing folder
+  auto saveFile() -> string;          //one file
+  auto selectFolder() -> string;      //one existing folder
+  auto setFilters(const string_vector& filters = {}) -> type&;
   auto setParent(const sWindow& parent) -> type&;
   auto setPath(const string& path = "") -> type&;
   auto setTitle(const string& title = "") -> type&;
@@ -19,14 +19,14 @@ struct BrowserDialog {
 private:
   struct State {
     string action;
-    lstring filters = {"*"};
+    string_vector filters = {"*"};
     sWindow parent;
     string path;
-    lstring response;
+    string_vector response;
     string title;
   } state;
 
-  auto _run() -> lstring;
+  auto _run() -> string_vector;
 
   friend class BrowserDialogWindow;
 };
diff --git a/extension/message-dialog.cpp b/extension/message-dialog.cpp
index d9e379d..6b5969e 100644
--- a/extension/message-dialog.cpp
+++ b/extension/message-dialog.cpp
@@ -4,19 +4,19 @@ MessageDialog::MessageDialog(const string& text) {
   state.text = text;
 }
 
-auto MessageDialog::error(const lstring& buttons) -> string {
+auto MessageDialog::error(const string_vector& buttons) -> string {
   state.buttons = buttons;
   state.icon = Icon::Prompt::Error;
   return _run();
 }
 
-auto MessageDialog::information(const lstring& buttons) -> string {
+auto MessageDialog::information(const string_vector& buttons) -> string {
   state.buttons = buttons;
   state.icon = Icon::Prompt::Information;
   return _run();
 }
 
-auto MessageDialog::question(const lstring& buttons) -> string {
+auto MessageDialog::question(const string_vector& buttons) -> string {
   state.buttons = buttons;
   state.icon = Icon::Prompt::Question;
   return _run();
@@ -37,7 +37,7 @@ auto MessageDialog::setTitle(const string& title) -> type& {
   return *this;
 }
 
-auto MessageDialog::warning(const lstring& buttons) -> string {
+auto MessageDialog::warning(const string_vector& buttons) -> string {
   state.buttons = buttons;
   state.icon = Icon::Prompt::Warning;
   return _run();
diff --git a/extension/message-dialog.hpp b/extension/message-dialog.hpp
index 64f845a..4373d99 100644
--- a/extension/message-dialog.hpp
+++ b/extension/message-dialog.hpp
@@ -4,17 +4,17 @@ struct MessageDialog {
   using type = MessageDialog;
 
   MessageDialog(const string& text = "");
-  auto error(const lstring& buttons = {"Ok"}) -> string;
-  auto information(const lstring& buttons = {"Ok"}) -> string;
-  auto question(const lstring& buttons = {"Yes", "No"}) -> string;
+  auto error(const string_vector& buttons = {"Ok"}) -> string;
+  auto information(const string_vector& buttons = {"Ok"}) -> string;
+  auto question(const string_vector& buttons = {"Yes", "No"}) -> string;
   auto setParent(sWindow parent = {}) -> type&;
   auto setText(const string& text = "") -> type&;
   auto setTitle(const string& title = "") -> type&;
-  auto warning(const lstring& buttons = {"Ok"}) -> string;
+  auto warning(const string_vector& buttons = {"Ok"}) -> string;
 
 private:
   struct State {
-    lstring buttons;
+    string_vector buttons;
     vector<uint8_t> icon;
     sWindow parent;
     string response;
diff --git a/gtk/browser-window.cpp b/gtk/browser-window.cpp
index 8b49e08..b788411 100644
--- a/gtk/browser-window.cpp
+++ b/gtk/browser-window.cpp
@@ -2,11 +2,11 @@
 
 namespace hiro {
 
-static auto BrowserWindow_addFilters(GtkWidget* dialog, lstring filters) -> void {
+static auto BrowserWindow_addFilters(GtkWidget* dialog, string_vector filters) -> void {
   for(auto& filter : filters) {
     GtkFileFilter* gtkFilter = gtk_file_filter_new();
     gtk_file_filter_set_name(gtkFilter, filter);
-    lstring patterns = filter.split("(", 1L)(1).trimRight(")", 1L).split(",").strip();
+    auto patterns = filter.split("(", 1L)(1).trimRight(")", 1L).split(",").strip();
     for(auto& pattern : patterns) gtk_file_filter_add_pattern(gtkFilter, pattern);
     gtk_file_chooser_add_filter(GTK_FILE_CHOOSER(dialog), gtkFilter);
   }
diff --git a/gtk/utility.cpp b/gtk/utility.cpp
index c30286f..4ce2078 100644
--- a/gtk/utility.cpp
+++ b/gtk/utility.cpp
@@ -36,11 +36,11 @@ static auto CreateImage(const image& icon, bool scale = false) -> GtkImage* {
   return gtkIcon;
 }
 
-static auto DropPaths(GtkSelectionData* data) -> lstring {
+static auto DropPaths(GtkSelectionData* data) -> string_vector {
   gchar** uris = gtk_selection_data_get_uris(data);
   if(uris == nullptr) return {};
 
-  lstring paths;
+  string_vector paths;
   for(unsigned n = 0; uris[n] != nullptr; n++) {
     gchar* pathname = g_filename_from_uri(uris[n], nullptr, nullptr);
     if(pathname == nullptr) continue;
diff --git a/gtk/widget/canvas.cpp b/gtk/widget/canvas.cpp
index 4bf2fe5..ca9a418 100644
--- a/gtk/widget/canvas.cpp
+++ b/gtk/widget/canvas.cpp
@@ -5,7 +5,7 @@ namespace hiro {
 static auto Canvas_drop(GtkWidget* widget, GdkDragContext* context, signed x, signed y,
 GtkSelectionData* data, unsigned type, unsigned timestamp, pCanvas* p) -> void {
   if(!p->state().droppable) return;
-  lstring paths = DropPaths(data);
+  auto paths = DropPaths(data);
   if(!paths) return;
   p->self().doDrop(paths);
 }
diff --git a/gtk/widget/console.hpp b/gtk/widget/console.hpp
index 5d27957..5b6053b 100644
--- a/gtk/widget/console.hpp
+++ b/gtk/widget/console.hpp
@@ -18,7 +18,7 @@ struct pConsole : pWidget {
   GtkWidget* subWidget = nullptr;
   GtkTextBuffer* textBuffer = nullptr;
   string previousPrompt;
-  lstring history;
+  string_vector history;
   unsigned historyOffset = 0;
 };
 
diff --git a/gtk/widget/icon-view.cpp b/gtk/widget/icon-view.cpp
index eb8c3ea..2bcae94 100644
--- a/gtk/widget/icon-view.cpp
+++ b/gtk/widget/icon-view.cpp
@@ -193,7 +193,7 @@ auto pIconView::_updateSelected() -> void {
   while(p) {
     auto path = (GtkTreePath*)p->data;
     char* pathString = gtk_tree_path_to_string(path);
-    unsigned position = natural(pathString);
+    unsigned position = toNatural(pathString);
     g_free(pathString);
     selected.append(position);
     p = p->next;
diff --git a/gtk/widget/table-view.cpp b/gtk/widget/table-view.cpp
index aa88fd7..315b4a8 100644
--- a/gtk/widget/table-view.cpp
+++ b/gtk/widget/table-view.cpp
@@ -218,7 +218,7 @@ auto pTableView::_doContext() -> void {
 
 auto pTableView::_doDataFunc(GtkTreeViewColumn* gtkColumn, GtkCellRenderer* renderer, GtkTreeIter* iter) -> void {
   auto path = gtk_tree_model_get_string_from_iter(gtkTreeModel, iter);
-  auto row = natural(path);
+  auto row = toNatural(path);
   g_free(path);
 
   if(auto& header = state().header) {
@@ -271,7 +271,7 @@ auto pTableView::_doEdit(GtkCellRendererText* gtkCellRendererText, const char* p
     for(auto& column : header->state.columns) {
       if(auto delegate = column->self()) {
         if(gtkCellRendererText == GTK_CELL_RENDERER_TEXT(delegate->gtkCellText)) {
-          auto row = natural(path);
+          auto row = toNatural(path);
           if(auto item = self().item(row)) {
             if(auto cell = item->cell(column->offset())) {
               if(string{text} != cell->state.text) {
@@ -343,7 +343,7 @@ auto pTableView::_doToggle(GtkCellRendererToggle* gtkCellRendererToggle, const c
     for(auto& column : header->state.columns) {
       if(auto delegate = column->self()) {
         if(gtkCellRendererToggle == GTK_CELL_RENDERER_TOGGLE(delegate->gtkCellToggle)) {
-          auto row = natural(path);
+          auto row = toNatural(path);
           if(auto item = self().item(row)) {
             if(auto cell = item->cell(column->offset())) {
               cell->setChecked(!cell->checked());
@@ -371,7 +371,7 @@ auto pTableView::_updateSelected() -> void {
     GtkTreeIter iter;
     if(gtk_tree_model_get_iter(gtkTreeModel, &iter, (GtkTreePath*)p->data)) {
       char* pathname = gtk_tree_model_get_string_from_iter(gtkTreeModel, &iter);
-      unsigned selection = natural(pathname);
+      unsigned selection = toNatural(pathname);
       g_free(pathname);
       selected.append(selection);
     }
diff --git a/gtk/widget/viewport.cpp b/gtk/widget/viewport.cpp
index d9c224d..515c4e6 100644
--- a/gtk/widget/viewport.cpp
+++ b/gtk/widget/viewport.cpp
@@ -5,7 +5,7 @@ namespace hiro {
 static auto Viewport_dropEvent(GtkWidget* widget, GdkDragContext* context, signed x, signed y,
 GtkSelectionData* data, unsigned type, unsigned timestamp, pViewport* p) -> void {
   if(!p->state().droppable) return;
-  lstring paths = DropPaths(data);
+  auto paths = DropPaths(data);
   if(!paths) return;
   p->self().doDrop(paths);
 }
diff --git a/gtk/window.cpp b/gtk/window.cpp
index 4a034f5..8cd4d28 100644
--- a/gtk/window.cpp
+++ b/gtk/window.cpp
@@ -81,7 +81,7 @@ static auto Window_configure(GtkWidget* widget, GdkEvent* event, pWindow* p) ->
 static auto Window_drop(GtkWidget* widget, GdkDragContext* context, signed x, signed y,
 GtkSelectionData* data, unsigned type, unsigned timestamp, pWindow* p) -> void {
   if(!p->state().droppable) return;
-  lstring paths = DropPaths(data);
+  auto paths = DropPaths(data);
   if(!paths) return;
   p->self().doDrop(paths);
 }
diff --git a/qt/utility.cpp b/qt/utility.cpp
index 885fd64..8e95eda 100644
--- a/qt/utility.cpp
+++ b/qt/utility.cpp
@@ -24,11 +24,11 @@ static auto CreateIcon(const image& icon, bool scale = false) -> QIcon {
   return QIcon(QPixmap::fromImage(qtImage));
 }
 
-static auto DropPaths(QDropEvent* event) -> lstring {
+static auto DropPaths(QDropEvent* event) -> string_vector {
   QList<QUrl> urls = event->mimeData()->urls();
   if(urls.size() == 0) return {};
 
-  lstring paths;
+  string_vector paths;
   for(auto n : range(urls.size())) {
     string path{urls[n].path().toUtf8().constData()};
     if(!path) continue;
diff --git a/reference/widget/list-view.cpp b/reference/widget/list-view.cpp
index d774389..7b73299 100644
--- a/reference/widget/list-view.cpp
+++ b/reference/widget/list-view.cpp
@@ -33,7 +33,7 @@ void pListView::setCheckedNone() {
 void pListView::setForegroundColor(Color color) {
 }
 
-void pListView::setHeaderText(const lstring& text) {
+void pListView::setHeaderText(const string_vector& text) {
 }
 
 void pListView::setHeaderVisible(bool visible) {
diff --git a/windows/browser-window.cpp b/windows/browser-window.cpp
index a43bfaf..8b82f16 100644
--- a/windows/browser-window.cpp
+++ b/windows/browser-window.cpp
@@ -19,7 +19,7 @@ static auto BrowserWindow_fileDialog(bool save, BrowserWindow::State& state) ->
 
   string filters;
   for(auto& filter : state.filters) {
-    lstring part = filter.split("(");
+    auto part = filter.split("(");
     if(part.size() != 2) continue;
     part[1].trimRight(")", 1L);
     part[1].replace(" ", "");
diff --git a/windows/utility.cpp b/windows/utility.cpp
index 31ca0f6..f415d6b 100644
--- a/windows/utility.cpp
+++ b/windows/utility.cpp
@@ -38,11 +38,11 @@ static auto CreateRGB(const Color& color) -> COLORREF {
   return RGB(color.red(), color.green(), color.blue());
 }
 
-static auto DropPaths(WPARAM wparam) -> lstring {
+static auto DropPaths(WPARAM wparam) -> string_vector {
   auto dropList = HDROP(wparam);
   auto fileCount = DragQueryFile(dropList, ~0u, nullptr, 0);
 
-  lstring paths;
+  string_vector paths;
   for(auto n : range(fileCount)) {
     auto length = DragQueryFile(dropList, n, nullptr, 0);
     auto buffer = new wchar_t[length + 1];
diff --git a/windows/widget/label.cpp b/windows/widget/label.cpp
index 552639e..3fc883d 100644
--- a/windows/widget/label.cpp
+++ b/windows/widget/label.cpp
@@ -17,7 +17,7 @@ auto pLabel::destruct() -> void {
 }
 
 auto pLabel::minimumSize() const -> Size {
-  auto size = pFont::size(hfont, state().text);
+  auto size = pFont::size(self().font(true), state().text ? state().text : " ");
   return {size.width(), size.height()};
 }
 
diff --git a/windows/window.cpp b/windows/window.cpp
index 77f53ee..2f5f8a9 100644
--- a/windows/window.cpp
+++ b/windows/window.cpp
@@ -176,7 +176,7 @@ auto pWindow::onClose() -> void {
 }
 
 auto pWindow::onDrop(WPARAM wparam) -> void {
-  lstring paths = DropPaths(wparam);
+  auto paths = DropPaths(wparam);
   if(paths) self().doDrop(paths);
 }