[App] Build title using StringBuffer.

src/xenia/app/emulator_window.cc

@@ -430,31 +430,40 @@ void EmulatorWindow::ShowCommitID() {
 }
 
 void EmulatorWindow::UpdateTitle() {
-  std::string title(base_title_);
+  xe::StringBuffer sb;
+  sb.Append(base_title_);
 
+  // Title information, if available
   if (emulator()->is_title_open()) {
-    auto game_title = emulator()->game_title();
-    title += fmt::format(" | [{:08X}] {}", emulator()->title_id(), game_title);
+    sb.AppendFormat(u8" | [{:08X}]", emulator()->title_id());
+
+    auto title_name = emulator()->title_name();
+    if (!title_name.empty()) {
+      sb.Append(u8" ");
+      sb.Append(title_name);
+    }
   }
 
+  // Graphics system name, if available
   auto graphics_system = emulator()->graphics_system();
   if (graphics_system) {
     auto graphics_name = graphics_system->name();
-    title += fmt::format(" <{}>", graphics_name);
+    if (!graphics_name.empty()) {
+      sb.Append(u8" <");
+      sb.Append(graphics_name);
+      sb.Append(u8">");
+    }
   }
 
   if (Clock::guest_time_scalar() != 1.0) {
-    title += fmt::format(" (@{:.2f}x)", Clock::guest_time_scalar());
+    sb.AppendFormat(u8" (@{:.2f}x)", Clock::guest_time_scalar());
   }
 
   if (initializing_shader_storage_) {
-    title +=
-        " (Preloading shaders"
-        u8"\u2026"
-        ")";
+    sb.Append(u8" (Preloading shaders\u2026)");
   }
 
-  window_->set_title(title);
+  window_->set_title(sb.to_string_view());
 }
 
 void EmulatorWindow::SetInitializingShaderStorage(bool initializing) {

src/xenia/ui/window.h

@@ -48,7 +48,7 @@ class Window {
   virtual void DisableMainMenu() = 0;
 
   const std::string& title() const { return title_; }
-  virtual bool set_title(const std::string& title) {
+  virtual bool set_title(const std::string_view title) {
     if (title == title_) {
       return false;
     }

src/xenia/ui/window_gtk.cc

@@ -99,11 +99,12 @@ void GTKWindow::OnClose() {
   super::OnClose();
 }
 
-bool GTKWindow::set_title(const std::string& title) {
+bool GTKWindow::set_title(const std::string_view title) {
   if (!super::set_title(title)) {
     return false;
   }
-  gtk_window_set_title(GTK_WINDOW(window_), (gchar*)title.c_str());
+  std::string titlez(title);
+  gtk_window_set_title(GTK_WINDOW(window_), (gchar*)titlez.c_str());
   return true;
 }
 

src/xenia/ui/window_gtk.h

@@ -38,7 +38,7 @@ class GTKWindow : public Window {
   void EnableMainMenu() override {}
   void DisableMainMenu() override {}
 
-  bool set_title(const std::string& title) override;
+  bool set_title(const std::string_view title) override;
 
   bool SetIcon(const void* buffer, size_t size) override;
 

src/xenia/ui/window_win.cc

@@ -199,11 +199,12 @@ void Win32Window::DisableMainMenu() {
   }
 }
 
-bool Win32Window::set_title(const std::string& title) {
+bool Win32Window::set_title(const std::string_view title) {
   if (!super::set_title(title)) {
     return false;
   }
-  SetWindowTextW(hwnd_, reinterpret_cast<LPCWSTR>(xe::to_utf16(title).c_str()));
+  auto wide_title = xe::to_utf16(title);
+  SetWindowTextW(hwnd_, reinterpret_cast<LPCWSTR>(wide_title.c_str()));
   return true;
 }
 

src/xenia/ui/window_win.h

@@ -34,7 +34,7 @@ class Win32Window : public Window {
   void EnableMainMenu() override;
   void DisableMainMenu() override;
 
-  bool set_title(const std::string& title) override;
+  bool set_title(const std::string_view title) override;
 
   bool SetIcon(const void* buffer, size_t size) override;