Ladybird: Move QApplication class to its own file

We'll attach some global data to it in an upcoming commit, so it needs
to be accessible outside of main.cpp.

Ladybird/CMakeLists.txt

@@ -114,6 +114,7 @@ set(LADYBIRD_HEADERS
 if (ENABLE_QT)
     qt_add_executable(ladybird ${SOURCES})
     target_sources(ladybird PRIVATE
+        Qt/Application.cpp
         Qt/AutoComplete.cpp
         Qt/BrowserWindow.cpp
         Qt/EventLoopImplementationQt.cpp

Ladybird/Qt/Application.cpp

@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2024, Andrew Kaster <akaster@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include "Application.h"
+#include "StringUtils.h"
+#include <LibWebView/URL.h>
+#include <QFileOpenEvent>
+
+namespace Ladybird {
+
+Application::Application(int& argc, char** argv)
+    : QApplication(argc, argv)
+{
+}
+
+bool Application::event(QEvent* event)
+{
+    switch (event->type()) {
+    case QEvent::FileOpen: {
+        if (!on_open_file)
+            break;
+
+        auto const& open_event = *static_cast<QFileOpenEvent const*>(event);
+        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());
+    }
+
+    default:
+        break;
+    }
+
+    return QApplication::event(event);
+}
+
+}

Ladybird/Qt/Application.h

@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2024, Andrew Kaster <akaster@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/Function.h>
+#include <LibURL/URL.h>
+#include <QApplication>
+
+namespace Ladybird {
+
+class Application : public QApplication {
+    Q_OBJECT
+
+public:
+    Application(int& argc, char** argv);
+
+    virtual bool event(QEvent* event) override;
+
+    Function<void(URL::URL)> on_open_file;
+};
+
+}

Ladybird/Qt/main.cpp

@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
+#include "Application.h"
 #include "BrowserWindow.h"
 #include "EventLoopImplementationQt.h"
 #include "Settings.h"
@@ -20,8 +21,6 @@
 #include <LibWebView/Database.h>
 #include <LibWebView/ProcessManager.h>
 #include <LibWebView/URL.h>
-#include <QApplication>
-#include <QFileOpenEvent>
 
 #if defined(AK_OS_MACOS)
 #    include <Ladybird/MachPortServer.h>
@@ -59,42 +58,11 @@ static ErrorOr<void> handle_attached_debugger()
     return {};
 }
 
-class LadybirdApplication : public QApplication {
-public:
-    LadybirdApplication(int& argc, char** argv)
-        : QApplication(argc, argv)
-    {
-    }
-
-    Function<void(URL::URL)> on_open_file;
-
-    bool event(QEvent* event) override
-    {
-        switch (event->type()) {
-        case QEvent::FileOpen: {
-            if (!on_open_file)
-                break;
-
-            auto const& open_event = *static_cast<QFileOpenEvent const*>(event);
-            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());
-        }
-
-        default:
-            break;
-        }
-
-        return QApplication::event(event);
-    }
-};
-
 ErrorOr<int> serenity_main(Main::Arguments arguments)
 {
     AK::set_rich_debug_enabled(true);
 
-    LadybirdApplication app(arguments.argc, arguments.argv);
+    Ladybird::Application app(arguments.argc, arguments.argv);
 
     Core::EventLoopManager::install(*new Ladybird::EventLoopManagerQt);
     Core::EventLoop event_loop;

Meta/gn/secondary/Ladybird/BUILD.gn

@@ -13,6 +13,7 @@ group("Ladybird") {
 
 moc_qt_objects("generate_moc") {
   sources = [
+    "Qt/Application.h",
     "Qt/AutoComplete.h",
     "Qt/BrowserWindow.h",
     "Qt/EventLoopImplementationQtEventTarget.h",
@@ -85,6 +86,7 @@ executable("ladybird_executable") {
     configs += [ ":ladybird_qt_components" ]
 
     sources += [
+      "Qt/Application.cpp",
       "Qt/AutoComplete.cpp",
       "Qt/BrowserWindow.cpp",
       "Qt/EventLoopImplementationQt.cpp",