Ladybird/Qt: Make String allocation infallible

Ladybird/Qt/AutoComplete.cpp

@@ -121,10 +121,10 @@ ErrorOr<void> AutoComplete::got_network_response(QNetworkReply* reply)
     return Error::from_string_view("Invalid engine name"sv);
 }
 
-ErrorOr<String> AutoComplete::auto_complete_url_from_query(StringView query)
+String AutoComplete::auto_complete_url_from_query(StringView query)
 {
-    auto autocomplete_engine = TRY(ak_string_from_qstring(Settings::the()->autocomplete_engine().url));
-    return autocomplete_engine.replace("{}"sv, AK::URL::percent_encode(query), ReplaceMode::FirstOnly);
+    auto autocomplete_engine = ak_string_from_qstring(Settings::the()->autocomplete_engine().url);
+    return MUST(autocomplete_engine.replace("{}"sv, AK::URL::percent_encode(query), ReplaceMode::FirstOnly));
 }
 
 void AutoComplete::clear_suggestions()
@@ -132,19 +132,17 @@ void AutoComplete::clear_suggestions()
     m_auto_complete_model->clear();
 }
 
-ErrorOr<void> AutoComplete::get_search_suggestions(StringView search_string)
+void AutoComplete::get_search_suggestions(String search_string)
 {
-    m_query = TRY(String::from_utf8(search_string));
+    m_query = move(search_string);
     if (m_reply)
         m_reply->abort();
 
     m_auto_complete_model->clear();
     m_auto_complete_model->add(m_query);
 
-    QNetworkRequest request { QUrl(qstring_from_ak_string(TRY(auto_complete_url_from_query(m_query)))) };
+    QNetworkRequest request { QUrl(qstring_from_ak_string(auto_complete_url_from_query(m_query))) };
     m_reply = m_manager->get(request);
-
-    return {};
 }
 
 }

Ladybird/Qt/AutoComplete.h

@@ -48,6 +48,7 @@ public:
 private:
     AK::Vector<String> m_suggestions;
 };
+
 class AutoComplete final : public QCompleter {
     Q_OBJECT
 
@@ -59,14 +60,15 @@ public:
         return index.data(Qt::DisplayRole).toString();
     }
 
-    ErrorOr<void> get_search_suggestions(StringView);
+    void get_search_suggestions(String);
     void clear_suggestions();
-    static ErrorOr<String> auto_complete_url_from_query(StringView query);
 
 signals:
     void activated(QModelIndex const&);
 
 private:
+    static String auto_complete_url_from_query(StringView query);
+
     ErrorOr<void> got_network_response(QNetworkReply* reply);
 
     ErrorOr<void> parse_google_autocomplete(Vector<JsonValue> const&);

Ladybird/Qt/LocationEdit.cpp

@@ -34,7 +34,7 @@ LocationEdit::LocationEdit(QWidget* parent)
         if (Settings::the()->enable_search())
             search_engine_url = Settings::the()->search_engine().query_url;
 
-        auto query = MUST(ak_string_from_qstring(text()));
+        auto query = ak_string_from_qstring(text());
 
         if (auto url = WebView::sanitize_url(query, search_engine_url); url.has_value())
             setText(qstring_from_ak_string(url->serialize()));
@@ -48,12 +48,7 @@ LocationEdit::LocationEdit(QWidget* parent)
 
         auto cursor_position = cursorPosition();
 
-        auto result = m_autocomplete->get_search_suggestions(ak_deprecated_string_from_qstring(text()));
-        if (result.is_error()) {
-            dbgln("LocationEdit::textEdited: get_search_suggestions failed: {}", result.error());
-            return;
-        }
-
+        m_autocomplete->get_search_suggestions(ak_string_from_qstring(text()));
         setCursorPosition(cursor_position);
     });
 
@@ -75,7 +70,7 @@ void LocationEdit::focusOutEvent(QFocusEvent* event)
 
 void LocationEdit::highlight_location()
 {
-    auto url = MUST(ak_string_from_qstring(text()));
+    auto url = ak_string_from_qstring(text());
     QList<QInputMethodEvent::Attribute> attributes;
 
     if (auto url_parts = WebView::break_url_into_parts(url); url_parts.has_value()) {

Ladybird/Qt/Settings.cpp

@@ -20,7 +20,7 @@ Settings::Settings()
     auto default_search_engine_name = qstring_from_ak_string(default_search_engine.name);
 
     auto search_engine_name = m_qsettings->value("search_engine_name", default_search_engine_name).toString();
-    auto search_engine = WebView::find_search_engine_by_name(MUST(ak_string_from_qstring(search_engine_name)));
+    auto search_engine = WebView::find_search_engine_by_name(ak_string_from_qstring(search_engine_name));
 
     if (search_engine.has_value())
         m_search_engine = search_engine.release_value();

Ladybird/Qt/SettingsDialog.cpp

@@ -37,11 +37,11 @@ SettingsDialog::SettingsDialog(QMainWindow* window)
     m_new_tab_page = make<QLineEdit>(this);
     m_new_tab_page->setText(Settings::the()->new_tab_page());
     QObject::connect(m_new_tab_page, &QLineEdit::textChanged, this, [this] {
-        auto url_string = MUST(ak_string_from_qstring(m_new_tab_page->text()));
+        auto url_string = ak_string_from_qstring(m_new_tab_page->text());
         m_new_tab_page->setStyleSheet(URL(url_string).is_valid() ? "" : "border: 1px solid red;");
     });
     QObject::connect(m_new_tab_page, &QLineEdit::editingFinished, this, [this] {
-        auto url_string = MUST(ak_string_from_qstring(m_new_tab_page->text()));
+        auto url_string = ak_string_from_qstring(m_new_tab_page->text());
         if (URL(url_string).is_valid())
             Settings::the()->set_new_tab_page(m_new_tab_page->text());
     });

Ladybird/Qt/StringUtils.cpp

@@ -11,10 +11,10 @@ AK::DeprecatedString ak_deprecated_string_from_qstring(QString const& qstring)
     return AK::DeprecatedString(qstring.toUtf8().data());
 }
 
-ErrorOr<String> ak_string_from_qstring(QString const& qstring)
+String ak_string_from_qstring(QString const& qstring)
 {
     auto utf8_data = qstring.toUtf8();
-    return String::from_utf8(StringView(utf8_data.data(), utf8_data.size()));
+    return MUST(String::from_utf8(StringView(utf8_data.data(), utf8_data.size())));
 }
 
 QString qstring_from_ak_string(StringView ak_string)

Ladybird/Qt/StringUtils.h

@@ -13,5 +13,5 @@
 #include <QString>
 
 AK::DeprecatedString ak_deprecated_string_from_qstring(QString const&);
-ErrorOr<String> ak_string_from_qstring(QString const&);
+String ak_string_from_qstring(QString const&);
 QString qstring_from_ak_string(StringView);

Ladybird/Qt/Tab.cpp

@@ -189,7 +189,7 @@ Tab::Tab(BrowserWindow* window, WebContentOptions const& web_content_options, St
         dialog.setTextValue(qstring_from_ak_string(default_));
 
         if (dialog.exec() == QDialog::Accepted)
-            view().prompt_closed(ak_string_from_qstring(dialog.textValue()).release_value_but_fixme_should_propagate_errors());
+            view().prompt_closed(ak_string_from_qstring(dialog.textValue()));
         else
             view().prompt_closed({});
 
@@ -295,7 +295,7 @@ Tab::Tab(BrowserWindow* window, WebContentOptions const& web_content_options, St
     take_visible_screenshot_action->setIcon(load_icon_from_uri("resource://icons/16x16/filetype-image.png"sv));
     QObject::connect(take_visible_screenshot_action, &QAction::triggered, this, [this]() {
         if (auto result = view().take_screenshot(WebView::ViewImplementation::ScreenshotType::Visible); result.is_error()) {
-            auto error = String::formatted("{}", result.error()).release_value_but_fixme_should_propagate_errors();
+            auto error = MUST(String::formatted("{}", result.error()));
             QMessageBox::warning(this, "Ladybird", qstring_from_ak_string(error));
         }
     });
@@ -304,7 +304,7 @@ Tab::Tab(BrowserWindow* window, WebContentOptions const& web_content_options, St
     take_full_screenshot_action->setIcon(load_icon_from_uri("resource://icons/16x16/filetype-image.png"sv));
     QObject::connect(take_full_screenshot_action, &QAction::triggered, this, [this]() {
         if (auto result = view().take_screenshot(WebView::ViewImplementation::ScreenshotType::Full); result.is_error()) {
-            auto error = String::formatted("{}", result.error()).release_value_but_fixme_should_propagate_errors();
+            auto error = MUST(String::formatted("{}", result.error()));
             QMessageBox::warning(this, "Ladybird", qstring_from_ak_string(error));
         }
     });
@@ -577,7 +577,7 @@ void Tab::focus_location_editor()
 
 void Tab::navigate(QString const& url_qstring)
 {
-    auto url_string = MUST(ak_string_from_qstring(url_qstring));
+    auto url_string = ak_string_from_qstring(url_qstring);
     view().load(url_string);
 }
 

Ladybird/Qt/WebSocketImplQt.cpp

@@ -53,7 +53,7 @@ void WebSocketImplQt::connect(WebSocket::ConnectionInfo const& connection_info)
     if (connection_info.is_secure()) {
         auto ssl_socket = make<QSslSocket>();
         ssl_socket->connectToHostEncrypted(
-            qstring_from_ak_string(connection_info.url().serialized_host().release_value_but_fixme_should_propagate_errors()),
+            qstring_from_ak_string(MUST(connection_info.url().serialized_host())),
             connection_info.url().port_or_default());
         QObject::connect(ssl_socket.ptr(), &QSslSocket::alertReceived, [this](QSsl::AlertLevel level, QSsl::AlertType, QString const&) {
             if (level == QSsl::AlertLevel::Fatal)
@@ -63,7 +63,7 @@ void WebSocketImplQt::connect(WebSocket::ConnectionInfo const& connection_info)
     } else {
         m_socket = make<QTcpSocket>();
         m_socket->connectToHost(
-            qstring_from_ak_string(connection_info.url().serialized_host().release_value_but_fixme_should_propagate_errors()),
+            qstring_from_ak_string(MUST(connection_info.url().serialized_host())),
             connection_info.url().port_or_default());
     }
 

Ladybird/Qt/main.cpp

@@ -72,7 +72,7 @@ public:
                 break;
 
             auto const& open_event = *static_cast<QFileOpenEvent const*>(event);
-            auto file = MUST(ak_string_from_qstring(open_event.file()));
+            auto file = ak_string_from_qstring(open_event.file());
 
             if (auto file_url = WebView::sanitize_url(file); file_url.has_value())
                 on_open_file(file_url.release_value());
@@ -137,7 +137,7 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
 
     if (initial_urls.is_empty()) {
         auto new_tab_page = Ladybird::Settings::the()->new_tab_page();
-        initial_urls.append(MUST(ak_string_from_qstring(new_tab_page)));
+        initial_urls.append(ak_string_from_qstring(new_tab_page));
     }
 
     Ladybird::WebContentOptions web_content_options {