HackStudio: Propagate errors using try_set_main_widget

The documentation tooltip and parameters hint tooltip initialization
functions are now fallible and now call try_set_main_widget
instead of set_main_widget. They are only called by Editor's new
custom try_create function.

Userland/DevTools/HackStudio/Editor.cpp

@@ -40,11 +40,17 @@
 
 namespace HackStudio {
 
+ErrorOr<NonnullRefPtr<Editor>> Editor::try_create()
+{
+    NonnullRefPtr<Editor> editor = TRY(adopt_nonnull_ref_or_enomem(new (nothrow) Editor()));
+    TRY(editor->initialize_documentation_tooltip());
+    TRY(editor->initialize_parameters_hint_tooltip());
+    return editor;
+}
+
 Editor::Editor()
 {
     set_document(CodeDocument::create());
-    initialize_documentation_tooltip();
-    initialize_parameters_hint_tooltip();
     m_evaluate_expression_action = GUI::Action::create("Evaluate expression", { Mod_Ctrl, Key_E }, [this](auto&) {
         VERIFY(is_program_running());
         auto dialog = EvaluateExpressionDialog::construct(window());
@@ -72,20 +78,22 @@ Editor::~Editor()
 {
 }
 
-void Editor::initialize_documentation_tooltip()
+ErrorOr<void> Editor::initialize_documentation_tooltip()
 {
     m_documentation_tooltip_window = GUI::Window::construct();
     m_documentation_tooltip_window->set_rect(0, 0, 500, 400);
     m_documentation_tooltip_window->set_window_type(GUI::WindowType::Tooltip);
-    m_documentation_page_view = m_documentation_tooltip_window->set_main_widget<Web::OutOfProcessWebView>();
+    m_documentation_page_view = TRY(m_documentation_tooltip_window->try_set_main_widget<Web::OutOfProcessWebView>());
+    return {};
 }
 
-void Editor::initialize_parameters_hint_tooltip()
+ErrorOr<void> Editor::initialize_parameters_hint_tooltip()
 {
     m_parameters_hint_tooltip_window = GUI::Window::construct();
     m_parameters_hint_tooltip_window->set_rect(0, 0, 280, 35);
     m_parameters_hint_tooltip_window->set_window_type(GUI::WindowType::Tooltip);
-    m_parameter_hint_page_view = m_parameters_hint_tooltip_window->set_main_widget<Web::OutOfProcessWebView>();
+    m_parameter_hint_page_view = TRY(m_parameters_hint_tooltip_window->try_set_main_widget<Web::OutOfProcessWebView>());
+    return {};
 }
 
 EditorWrapper& Editor::wrapper()

Userland/DevTools/HackStudio/Editor.h

@@ -21,8 +21,10 @@ namespace HackStudio {
 class EditorWrapper;
 
 class Editor final : public GUI::TextEditor {
-    C_OBJECT(Editor)
+    C_OBJECT_ABSTRACT(Editor)
 public:
+    static ErrorOr<NonnullRefPtr<Editor>> try_create();
+
     virtual ~Editor() override;
 
     Function<void()> on_focus;
@@ -115,8 +117,8 @@ private:
     RefPtr<GUI::Action> m_move_execution_to_line_action;
 
     OwnPtr<LanguageClient> m_language_client;
-    void initialize_documentation_tooltip();
+    ErrorOr<void> initialize_documentation_tooltip();
-    void initialize_parameters_hint_tooltip();
+    ErrorOr<void> initialize_parameters_hint_tooltip();
 };
 
 }

Userland/DevTools/HackStudio/EditorWrapper.cpp

@@ -30,7 +30,8 @@ EditorWrapper::EditorWrapper()
     m_filename_label->set_text_alignment(Gfx::TextAlignment::CenterLeft);
     m_filename_label->set_fixed_height(14);
 
-    m_editor = add<Editor>();
+    // FIXME: Propagate errors instead of giving up
+    m_editor = MUST(try_add<Editor>());
     m_editor->set_ruler_visible(true);
     m_editor->set_automatic_indentation_enabled(true);