chore(all): Relase 0.2.0

.metadata

@@ -18,6 +18,9 @@ migration:
     - platform: android
       create_revision: 4d9e56e694b656610ab87fcf2efbcd226e0ed8cf
       base_revision: 4d9e56e694b656610ab87fcf2efbcd226e0ed8cf
+    - platform: linux
+      create_revision: 4d9e56e694b656610ab87fcf2efbcd226e0ed8cf
+      base_revision: 4d9e56e694b656610ab87fcf2efbcd226e0ed8cf
 
   # User provided section
 

README.md

@@ -2,5 +2,28 @@
 
 Interactions with the system for Moxxy.
 
-This library is supposed to be the successor of moxplatform, featuring
+This library is the successor of moxplatform, featuring
 cleaner and more maintainable code.
+
+## Implementation Status
+
+### Android
+
+Everything works.
+
+### Linux
+
+Only creating the "background service" works. For everything else, we're waiting on
+[this Flutter issue](https://github.com/flutter/flutter/issues/73740), which would allow
+us to implement/stub the missing native APIs.
+
+## License
+
+See `./LICENSE`.
+
+## Special Thanks
+
+Thanks to [ekasetiawans](https://github.com/ekasetiawans) for [flutter_background_service](https://github.com/ekasetiawans/flutter_background_service), which
+was essentially the blueprint for the service and background service APIs. They were reimplemented
+to allow the root isolate to pass some additional data to the service, which `flutter_background_service`
+did not support.

example/lib/main.dart

@@ -127,21 +127,23 @@ class MyAppState extends State<MyApp> {
             TextButton(
                 onPressed: () async {
                   // Create channel
-                  await MoxxyNotificationsApi().createNotificationChannels(
+                  if (Platform.isAndroid) {
-                    [
+                    await MoxxyNotificationsApi().createNotificationChannels(
-                      NotificationChannel(
+                      [
-                        id: 'foreground_service',
+                        NotificationChannel(
-                        title: 'Foreground service',
+                          id: 'foreground_service',
-                        description: 'lol',
+                          title: 'Foreground service',
-                        importance: NotificationChannelImportance.MIN,
+                          description: 'lol',
-                        showBadge: false,
+                          importance: NotificationChannelImportance.MIN,
-                        vibration: false,
+                          showBadge: false,
-                        enableLights: false,
+                          vibration: false,
-                      ),
+                          enableLights: false,
-                    ],
+                        ),
-                  );
+                      ],
+                    );
 
-                  await Permission.notification.request();
+                    await Permission.notification.request();
+                  }
 
                   final srv = getForegroundService();
                   await srv.start(

example/linux/.gitignore

@@ -0,0 +1 @@
+flutter/ephemeral

example/linux/CMakeLists.txt

@@ -0,0 +1,138 @@
+# Project-level configuration.
+cmake_minimum_required(VERSION 3.10)
+project(runner LANGUAGES CXX)
+
+# The name of the executable created for the application. Change this to change
+# the on-disk name of your application.
+set(BINARY_NAME "moxxy_native_example")
+# The unique GTK application identifier for this application. See:
+# https://wiki.gnome.org/HowDoI/ChooseApplicationID
+set(APPLICATION_ID "org.moxxy.moxxy_native")
+
+# Explicitly opt in to modern CMake behaviors to avoid warnings with recent
+# versions of CMake.
+cmake_policy(SET CMP0063 NEW)
+
+# Load bundled libraries from the lib/ directory relative to the binary.
+set(CMAKE_INSTALL_RPATH "$ORIGIN/lib")
+
+# Root filesystem for cross-building.
+if(FLUTTER_TARGET_PLATFORM_SYSROOT)
+  set(CMAKE_SYSROOT ${FLUTTER_TARGET_PLATFORM_SYSROOT})
+  set(CMAKE_FIND_ROOT_PATH ${CMAKE_SYSROOT})
+  set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+  set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
+  set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+  set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+endif()
+
+# Define build configuration options.
+if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
+  set(CMAKE_BUILD_TYPE "Debug" CACHE
+    STRING "Flutter build mode" FORCE)
+  set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS
+    "Debug" "Profile" "Release")
+endif()
+
+# Compilation settings that should be applied to most targets.
+#
+# Be cautious about adding new options here, as plugins use this function by
+# default. In most cases, you should add new options to specific targets instead
+# of modifying this function.
+function(APPLY_STANDARD_SETTINGS TARGET)
+  target_compile_features(${TARGET} PUBLIC cxx_std_14)
+  target_compile_options(${TARGET} PRIVATE -Wall -Werror)
+  target_compile_options(${TARGET} PRIVATE "$<$<NOT:$<CONFIG:Debug>>:-O3>")
+  target_compile_definitions(${TARGET} PRIVATE "$<$<NOT:$<CONFIG:Debug>>:NDEBUG>")
+endfunction()
+
+# Flutter library and tool build rules.
+set(FLUTTER_MANAGED_DIR "${CMAKE_CURRENT_SOURCE_DIR}/flutter")
+add_subdirectory(${FLUTTER_MANAGED_DIR})
+
+# System-level dependencies.
+find_package(PkgConfig REQUIRED)
+pkg_check_modules(GTK REQUIRED IMPORTED_TARGET gtk+-3.0)
+
+add_definitions(-DAPPLICATION_ID="${APPLICATION_ID}")
+
+# Define the application target. To change its name, change BINARY_NAME above,
+# not the value here, or `flutter run` will no longer work.
+#
+# Any new source files that you add to the application should be added here.
+add_executable(${BINARY_NAME}
+  "main.cc"
+  "my_application.cc"
+  "${FLUTTER_MANAGED_DIR}/generated_plugin_registrant.cc"
+)
+
+# Apply the standard set of build settings. This can be removed for applications
+# that need different build settings.
+apply_standard_settings(${BINARY_NAME})
+
+# Add dependency libraries. Add any application-specific dependencies here.
+target_link_libraries(${BINARY_NAME} PRIVATE flutter)
+target_link_libraries(${BINARY_NAME} PRIVATE PkgConfig::GTK)
+
+# Run the Flutter tool portions of the build. This must not be removed.
+add_dependencies(${BINARY_NAME} flutter_assemble)
+
+# Only the install-generated bundle's copy of the executable will launch
+# correctly, since the resources must in the right relative locations. To avoid
+# people trying to run the unbundled copy, put it in a subdirectory instead of
+# the default top-level location.
+set_target_properties(${BINARY_NAME}
+  PROPERTIES
+  RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/intermediates_do_not_run"
+)
+
+# Generated plugin build rules, which manage building the plugins and adding
+# them to the application.
+include(flutter/generated_plugins.cmake)
+
+
+# === Installation ===
+# By default, "installing" just makes a relocatable bundle in the build
+# directory.
+set(BUILD_BUNDLE_DIR "${PROJECT_BINARY_DIR}/bundle")
+if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
+  set(CMAKE_INSTALL_PREFIX "${BUILD_BUNDLE_DIR}" CACHE PATH "..." FORCE)
+endif()
+
+# Start with a clean build bundle directory every time.
+install(CODE "
+  file(REMOVE_RECURSE \"${BUILD_BUNDLE_DIR}/\")
+  " COMPONENT Runtime)
+
+set(INSTALL_BUNDLE_DATA_DIR "${CMAKE_INSTALL_PREFIX}/data")
+set(INSTALL_BUNDLE_LIB_DIR "${CMAKE_INSTALL_PREFIX}/lib")
+
+install(TARGETS ${BINARY_NAME} RUNTIME DESTINATION "${CMAKE_INSTALL_PREFIX}"
+  COMPONENT Runtime)
+
+install(FILES "${FLUTTER_ICU_DATA_FILE}" DESTINATION "${INSTALL_BUNDLE_DATA_DIR}"
+  COMPONENT Runtime)
+
+install(FILES "${FLUTTER_LIBRARY}" DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
+  COMPONENT Runtime)
+
+foreach(bundled_library ${PLUGIN_BUNDLED_LIBRARIES})
+  install(FILES "${bundled_library}"
+    DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
+    COMPONENT Runtime)
+endforeach(bundled_library)
+
+# Fully re-copy the assets directory on each build to avoid having stale files
+# from a previous install.
+set(FLUTTER_ASSET_DIR_NAME "flutter_assets")
+install(CODE "
+  file(REMOVE_RECURSE \"${INSTALL_BUNDLE_DATA_DIR}/${FLUTTER_ASSET_DIR_NAME}\")
+  " COMPONENT Runtime)
+install(DIRECTORY "${PROJECT_BUILD_DIR}/${FLUTTER_ASSET_DIR_NAME}"
+  DESTINATION "${INSTALL_BUNDLE_DATA_DIR}" COMPONENT Runtime)
+
+# Install the AOT library on non-Debug builds only.
+if(NOT CMAKE_BUILD_TYPE MATCHES "Debug")
+  install(FILES "${AOT_LIBRARY}" DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
+    COMPONENT Runtime)
+endif()

example/linux/flutter/CMakeLists.txt

@@ -0,0 +1,88 @@
+# This file controls Flutter-level build steps. It should not be edited.
+cmake_minimum_required(VERSION 3.10)
+
+set(EPHEMERAL_DIR "${CMAKE_CURRENT_SOURCE_DIR}/ephemeral")
+
+# Configuration provided via flutter tool.
+include(${EPHEMERAL_DIR}/generated_config.cmake)
+
+# TODO: Move the rest of this into files in ephemeral. See
+# https://github.com/flutter/flutter/issues/57146.
+
+# Serves the same purpose as list(TRANSFORM ... PREPEND ...),
+# which isn't available in 3.10.
+function(list_prepend LIST_NAME PREFIX)
+    set(NEW_LIST "")
+    foreach(element ${${LIST_NAME}})
+        list(APPEND NEW_LIST "${PREFIX}${element}")
+    endforeach(element)
+    set(${LIST_NAME} "${NEW_LIST}" PARENT_SCOPE)
+endfunction()
+
+# === Flutter Library ===
+# System-level dependencies.
+find_package(PkgConfig REQUIRED)
+pkg_check_modules(GTK REQUIRED IMPORTED_TARGET gtk+-3.0)
+pkg_check_modules(GLIB REQUIRED IMPORTED_TARGET glib-2.0)
+pkg_check_modules(GIO REQUIRED IMPORTED_TARGET gio-2.0)
+
+set(FLUTTER_LIBRARY "${EPHEMERAL_DIR}/libflutter_linux_gtk.so")
+
+# Published to parent scope for install step.
+set(FLUTTER_LIBRARY ${FLUTTER_LIBRARY} PARENT_SCOPE)
+set(FLUTTER_ICU_DATA_FILE "${EPHEMERAL_DIR}/icudtl.dat" PARENT_SCOPE)
+set(PROJECT_BUILD_DIR "${PROJECT_DIR}/build/" PARENT_SCOPE)
+set(AOT_LIBRARY "${PROJECT_DIR}/build/lib/libapp.so" PARENT_SCOPE)
+
+list(APPEND FLUTTER_LIBRARY_HEADERS
+  "fl_basic_message_channel.h"
+  "fl_binary_codec.h"
+  "fl_binary_messenger.h"
+  "fl_dart_project.h"
+  "fl_engine.h"
+  "fl_json_message_codec.h"
+  "fl_json_method_codec.h"
+  "fl_message_codec.h"
+  "fl_method_call.h"
+  "fl_method_channel.h"
+  "fl_method_codec.h"
+  "fl_method_response.h"
+  "fl_plugin_registrar.h"
+  "fl_plugin_registry.h"
+  "fl_standard_message_codec.h"
+  "fl_standard_method_codec.h"
+  "fl_string_codec.h"
+  "fl_value.h"
+  "fl_view.h"
+  "flutter_linux.h"
+)
+list_prepend(FLUTTER_LIBRARY_HEADERS "${EPHEMERAL_DIR}/flutter_linux/")
+add_library(flutter INTERFACE)
+target_include_directories(flutter INTERFACE
+  "${EPHEMERAL_DIR}"
+)
+target_link_libraries(flutter INTERFACE "${FLUTTER_LIBRARY}")
+target_link_libraries(flutter INTERFACE
+  PkgConfig::GTK
+  PkgConfig::GLIB
+  PkgConfig::GIO
+)
+add_dependencies(flutter flutter_assemble)
+
+# === Flutter tool backend ===
+# _phony_ is a non-existent file to force this command to run every time,
+# since currently there's no way to get a full input/output list from the
+# flutter tool.
+add_custom_command(
+  OUTPUT ${FLUTTER_LIBRARY} ${FLUTTER_LIBRARY_HEADERS}
+    ${CMAKE_CURRENT_BINARY_DIR}/_phony_
+  COMMAND ${CMAKE_COMMAND} -E env
+    ${FLUTTER_TOOL_ENVIRONMENT}
+    "${FLUTTER_ROOT}/packages/flutter_tools/bin/tool_backend.sh"
+      ${FLUTTER_TARGET_PLATFORM} ${CMAKE_BUILD_TYPE}
+  VERBATIM
+)
+add_custom_target(flutter_assemble DEPENDS
+  "${FLUTTER_LIBRARY}"
+  ${FLUTTER_LIBRARY_HEADERS}
+)

example/linux/flutter/generated_plugin_registrant.cc

@@ -0,0 +1,15 @@
+//
+//  Generated file. Do not edit.
+//
+
+// clang-format off
+
+#include "generated_plugin_registrant.h"
+
+#include <moxxy_native/moxxy_native_plugin.h>
+
+void fl_register_plugins(FlPluginRegistry* registry) {
+  g_autoptr(FlPluginRegistrar) moxxy_native_registrar =
+      fl_plugin_registry_get_registrar_for_plugin(registry, "MoxxyNativePlugin");
+  moxxy_native_plugin_register_with_registrar(moxxy_native_registrar);
+}

example/linux/flutter/generated_plugin_registrant.h

@@ -0,0 +1,15 @@
+//
+//  Generated file. Do not edit.
+//
+
+// clang-format off
+
+#ifndef GENERATED_PLUGIN_REGISTRANT_
+#define GENERATED_PLUGIN_REGISTRANT_
+
+#include <flutter_linux/flutter_linux.h>
+
+// Registers Flutter plugins.
+void fl_register_plugins(FlPluginRegistry* registry);
+
+#endif  // GENERATED_PLUGIN_REGISTRANT_

example/linux/flutter/generated_plugins.cmake

@@ -0,0 +1,24 @@
+#
+# Generated file, do not edit.
+#
+
+list(APPEND FLUTTER_PLUGIN_LIST
+  moxxy_native
+)
+
+list(APPEND FLUTTER_FFI_PLUGIN_LIST
+)
+
+set(PLUGIN_BUNDLED_LIBRARIES)
+
+foreach(plugin ${FLUTTER_PLUGIN_LIST})
+  add_subdirectory(flutter/ephemeral/.plugin_symlinks/${plugin}/linux plugins/${plugin})
+  target_link_libraries(${BINARY_NAME} PRIVATE ${plugin}_plugin)
+  list(APPEND PLUGIN_BUNDLED_LIBRARIES $<TARGET_FILE:${plugin}_plugin>)
+  list(APPEND PLUGIN_BUNDLED_LIBRARIES ${${plugin}_bundled_libraries})
+endforeach(plugin)
+
+foreach(ffi_plugin ${FLUTTER_FFI_PLUGIN_LIST})
+  add_subdirectory(flutter/ephemeral/.plugin_symlinks/${ffi_plugin}/linux plugins/${ffi_plugin})
+  list(APPEND PLUGIN_BUNDLED_LIBRARIES ${${ffi_plugin}_bundled_libraries})
+endforeach(ffi_plugin)

example/linux/main.cc

@@ -0,0 +1,6 @@
+#include "my_application.h"
+
+int main(int argc, char** argv) {
+  g_autoptr(MyApplication) app = my_application_new();
+  return g_application_run(G_APPLICATION(app), argc, argv);
+}

example/linux/my_application.cc

@@ -0,0 +1,104 @@
+#include "my_application.h"
+
+#include <flutter_linux/flutter_linux.h>
+#ifdef GDK_WINDOWING_X11
+#include <gdk/gdkx.h>
+#endif
+
+#include "flutter/generated_plugin_registrant.h"
+
+struct _MyApplication {
+  GtkApplication parent_instance;
+  char** dart_entrypoint_arguments;
+};
+
+G_DEFINE_TYPE(MyApplication, my_application, GTK_TYPE_APPLICATION)
+
+// Implements GApplication::activate.
+static void my_application_activate(GApplication* application) {
+  MyApplication* self = MY_APPLICATION(application);
+  GtkWindow* window =
+      GTK_WINDOW(gtk_application_window_new(GTK_APPLICATION(application)));
+
+  // Use a header bar when running in GNOME as this is the common style used
+  // by applications and is the setup most users will be using (e.g. Ubuntu
+  // desktop).
+  // If running on X and not using GNOME then just use a traditional title bar
+  // in case the window manager does more exotic layout, e.g. tiling.
+  // If running on Wayland assume the header bar will work (may need changing
+  // if future cases occur).
+  gboolean use_header_bar = TRUE;
+#ifdef GDK_WINDOWING_X11
+  GdkScreen* screen = gtk_window_get_screen(window);
+  if (GDK_IS_X11_SCREEN(screen)) {
+    const gchar* wm_name = gdk_x11_screen_get_window_manager_name(screen);
+    if (g_strcmp0(wm_name, "GNOME Shell") != 0) {
+      use_header_bar = FALSE;
+    }
+  }
+#endif
+  if (use_header_bar) {
+    GtkHeaderBar* header_bar = GTK_HEADER_BAR(gtk_header_bar_new());
+    gtk_widget_show(GTK_WIDGET(header_bar));
+    gtk_header_bar_set_title(header_bar, "moxxy_native_example");
+    gtk_header_bar_set_show_close_button(header_bar, TRUE);
+    gtk_window_set_titlebar(window, GTK_WIDGET(header_bar));
+  } else {
+    gtk_window_set_title(window, "moxxy_native_example");
+  }
+
+  gtk_window_set_default_size(window, 1280, 720);
+  gtk_widget_show(GTK_WIDGET(window));
+
+  g_autoptr(FlDartProject) project = fl_dart_project_new();
+  fl_dart_project_set_dart_entrypoint_arguments(project, self->dart_entrypoint_arguments);
+
+  FlView* view = fl_view_new(project);
+  gtk_widget_show(GTK_WIDGET(view));
+  gtk_container_add(GTK_CONTAINER(window), GTK_WIDGET(view));
+
+  fl_register_plugins(FL_PLUGIN_REGISTRY(view));
+
+  gtk_widget_grab_focus(GTK_WIDGET(view));
+}
+
+// Implements GApplication::local_command_line.
+static gboolean my_application_local_command_line(GApplication* application, gchar*** arguments, int* exit_status) {
+  MyApplication* self = MY_APPLICATION(application);
+  // Strip out the first argument as it is the binary name.
+  self->dart_entrypoint_arguments = g_strdupv(*arguments + 1);
+
+  g_autoptr(GError) error = nullptr;
+  if (!g_application_register(application, nullptr, &error)) {
+     g_warning("Failed to register: %s", error->message);
+     *exit_status = 1;
+     return TRUE;
+  }
+
+  g_application_activate(application);
+  *exit_status = 0;
+
+  return TRUE;
+}
+
+// Implements GObject::dispose.
+static void my_application_dispose(GObject* object) {
+  MyApplication* self = MY_APPLICATION(object);
+  g_clear_pointer(&self->dart_entrypoint_arguments, g_strfreev);
+  G_OBJECT_CLASS(my_application_parent_class)->dispose(object);
+}
+
+static void my_application_class_init(MyApplicationClass* klass) {
+  G_APPLICATION_CLASS(klass)->activate = my_application_activate;
+  G_APPLICATION_CLASS(klass)->local_command_line = my_application_local_command_line;
+  G_OBJECT_CLASS(klass)->dispose = my_application_dispose;
+}
+
+static void my_application_init(MyApplication* self) {}
+
+MyApplication* my_application_new() {
+  return MY_APPLICATION(g_object_new(my_application_get_type(),
+                                     "application-id", APPLICATION_ID,
+                                     "flags", G_APPLICATION_NON_UNIQUE,
+                                     nullptr));
+}

example/linux/my_application.h

@@ -0,0 +1,18 @@
+#ifndef FLUTTER_MY_APPLICATION_H_
+#define FLUTTER_MY_APPLICATION_H_
+
+#include <gtk/gtk.h>
+
+G_DECLARE_FINAL_TYPE(MyApplication, my_application, MY, APPLICATION,
+                     GtkApplication)
+
+/**
+ * my_application_new:
+ *
+ * Creates a new Flutter-based application.
+ *
+ * Returns: a new #MyApplication.
+ */
+MyApplication* my_application_new();
+
+#endif  // FLUTTER_MY_APPLICATION_H_

flake.nix

@@ -51,6 +51,9 @@
         # Android
         pinnedJDK sdk ktlint
 
+        # Linux
+        clang cmake gtk3 ninja pkg-config xz pcre2 glib
+
         # Flutter
         flutterVersion
 

lib/pigeon/background_service.g.dart

@@ -20,10 +20,10 @@ class MoxxyBackgroundServiceApi {
 
   Future<String> getExtraData() async {
     final BasicMessageChannel<Object?> channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.moxxy_native.MoxxyBackgroundServiceApi.getExtraData', codec,
+        'dev.flutter.pigeon.moxxy_native.MoxxyBackgroundServiceApi.getExtraData',
+        codec,
         binaryMessenger: _binaryMessenger);
-    final List<Object?>? replyList =
+    final List<Object?>? replyList = await channel.send(null) as List<Object?>?;
-        await channel.send(null) as List<Object?>?;
     if (replyList == null) {
       throw PlatformException(
         code: 'channel-error',
@@ -47,7 +47,8 @@ class MoxxyBackgroundServiceApi {
 
   Future<void> setNotificationBody(String arg_body) async {
     final BasicMessageChannel<Object?> channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.moxxy_native.MoxxyBackgroundServiceApi.setNotificationBody', codec,
+        'dev.flutter.pigeon.moxxy_native.MoxxyBackgroundServiceApi.setNotificationBody',
+        codec,
         binaryMessenger: _binaryMessenger);
     final List<Object?>? replyList =
         await channel.send(<Object?>[arg_body]) as List<Object?>?;
@@ -69,7 +70,8 @@ class MoxxyBackgroundServiceApi {
 
   Future<void> sendData(String arg_data) async {
     final BasicMessageChannel<Object?> channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.moxxy_native.MoxxyBackgroundServiceApi.sendData', codec,
+        'dev.flutter.pigeon.moxxy_native.MoxxyBackgroundServiceApi.sendData',
+        codec,
         binaryMessenger: _binaryMessenger);
     final List<Object?>? replyList =
         await channel.send(<Object?>[arg_data]) as List<Object?>?;
@@ -93,8 +95,7 @@ class MoxxyBackgroundServiceApi {
     final BasicMessageChannel<Object?> channel = BasicMessageChannel<Object?>(
         'dev.flutter.pigeon.moxxy_native.MoxxyBackgroundServiceApi.stop', codec,
         binaryMessenger: _binaryMessenger);
-    final List<Object?>? replyList =
+    final List<Object?>? replyList = await channel.send(null) as List<Object?>?;
-        await channel.send(null) as List<Object?>?;
     if (replyList == null) {
       throw PlatformException(
         code: 'channel-error',

lib/src/service/background/isolate.dart

@@ -0,0 +1,53 @@
+import 'dart:convert';
+import 'dart:isolate';
+import 'dart:ui';
+import 'package:logging/logging.dart';
+import 'package:moxlib/moxlib.dart';
+import 'package:moxxy_native/src/service/background/base.dart';
+import 'package:moxxy_native/src/service/config.dart';
+import 'package:moxxy_native/src/service/datasender/types.dart';
+import 'package:uuid/uuid.dart';
+
+class IsolateBackgroundService extends BackgroundService {
+  IsolateBackgroundService(this._sendPort);
+  final SendPort _sendPort;
+  final ReceivePort receivePort = ReceivePort();
+
+  /// A logger.
+  final Logger _log = Logger('IsolateBackgroundService');
+
+  @override
+  Future<void> send(BackgroundEvent event, {String? id}) async {
+    final data = DataWrapper(
+      id ?? const Uuid().v4(),
+      event,
+    );
+
+    _sendPort.send(jsonEncode(data.toJson()));
+  }
+
+  @override
+  Future<void> init(
+    ServiceConfig config,
+  ) async {
+    // Ensure that the Dart executor is ready to use plugins
+    // NOTE: We're not allowed to use this here. Maybe reusing the RootIsolateToken
+    //       (See IsolateForegroundService) helps?
+    // WidgetsFlutterBinding.ensureInitialized();
+    DartPluginRegistrant.ensureInitialized();
+
+    // Register the channel for Foreground -> Service communication
+    receivePort.listen((data) async {
+      // TODO(Unknown): Maybe do something smarter like pigeon and use Lists instead of Maps
+      await config
+          .handleData(jsonDecode(data! as String) as Map<String, dynamic>);
+    });
+
+    // Start execution
+    _log.finest('Setup complete. Calling main entrypoint...');
+    await config.entrypoint(config.initialLocale);
+  }
+
+  @override
+  void setNotificationBody(String body) {}
+}

lib/src/service/datasender/isolate.dart

@@ -0,0 +1,15 @@
+import 'dart:convert';
+import 'dart:isolate';
+import 'package:moxlib/moxlib.dart';
+import 'package:moxxy_native/src/service/datasender/types.dart';
+
+class IsolateForegroundServiceDataSender
+    extends AwaitableDataSender<BackgroundCommand, BackgroundEvent> {
+  IsolateForegroundServiceDataSender(this._port);
+  final SendPort _port;
+
+  @override
+  Future<void> sendDataImpl(DataWrapper<JsonImplementation> data) async {
+    _port.send(jsonEncode(data.toJson()));
+  }
+}

lib/src/service/datasender/types.dart

@@ -1,8 +1,4 @@
-import 'dart:io';
 import 'package:moxlib/moxlib.dart';
-import 'package:moxxy_native/pigeon/service.g.dart';
-import 'package:moxxy_native/src/service/datasender/pigeon.dart';
-import 'package:moxxy_native/src/service/exceptions.dart';
 
 typedef ForegroundServiceDataSender
     = AwaitableDataSender<BackgroundCommand, BackgroundEvent>;
@@ -10,11 +6,3 @@ typedef ForegroundServiceDataSender
 abstract class BackgroundCommand implements JsonImplementation {}
 
 abstract class BackgroundEvent implements JsonImplementation {}
-
-ForegroundServiceDataSender getForegroundDataSender(MoxxyServiceApi api) {
-  if (Platform.isAndroid) {
-    return PigeonForegroundServiceDataSender(api);
-  } else {
-    throw UnsupportedPlatformException();
-  }
-}

lib/src/service/entrypoints/base.dart

@@ -0,0 +1,28 @@
+import 'dart:io';
+import 'package:moxxy_native/src/service/config.dart';
+import 'package:moxxy_native/src/service/entrypoints/isolate.dart';
+import 'package:moxxy_native/src/service/entrypoints/pigeon.dart';
+import 'package:moxxy_native/src/service/exceptions.dart';
+
+typedef PlatformEntrypointCallback = Future<void> Function(dynamic);
+
+ServiceConfig getServiceConfig(
+  HandleEventCallback srvHandleData,
+  HandleEventCallback uiHandleData,
+  String initialLocale,
+) {
+  PlatformEntrypointCallback entrypoint;
+  if (Platform.isAndroid) {
+    entrypoint = pigeonEntrypoint;
+  } else if (Platform.isLinux || Platform.isWindows || Platform.isMacOS) {
+    entrypoint = isolateEntrypoint;
+  } else {
+    throw UnsupportedPlatformException();
+  }
+
+  return ServiceConfig(
+    entrypoint,
+    srvHandleData,
+    initialLocale,
+  );
+}

lib/src/service/entrypoints/isolate.dart

@@ -0,0 +1,30 @@
+import 'dart:isolate';
+import 'package:flutter/services.dart';
+import 'package:get_it/get_it.dart';
+import 'package:moxxy_native/src/service/background/base.dart';
+import 'package:moxxy_native/src/service/background/isolate.dart';
+import 'package:moxxy_native/src/service/config.dart';
+
+@pragma('vm:entry-point')
+Future<void> isolateEntrypoint(dynamic parameters) async {
+  parameters as List<dynamic>;
+
+  final sendPort = parameters[0] as SendPort;
+  final config = ServiceConfig.fromString(parameters[1] as String);
+
+  // This allows us to use the root isolate's method channels.
+  // See https://medium.com/flutter/introducing-background-isolate-channels-7a299609cad8
+  BackgroundIsolateBinaryMessenger.ensureInitialized(
+    parameters[2] as RootIsolateToken,
+  );
+
+  // Set up the background service
+  final srv = IsolateBackgroundService(sendPort);
+  GetIt.I.registerSingleton<BackgroundService>(srv);
+
+  // Reply back with the new send port
+  sendPort.send(srv.receivePort.sendPort);
+
+  // Run the entrypoint
+  await srv.init(config);
+}

lib/src/service/entrypoints/pigeon.dart

@@ -8,7 +8,7 @@ import 'package:moxxy_native/src/service/config.dart';
 /// An entrypoint that should be used when the service runs
 /// in a new Flutter Engine.
 @pragma('vm:entry-point')
-Future<void> pigeonEntrypoint() async {
+Future<void> pigeonEntrypoint(dynamic _) async {
   // ignore: avoid_print
   print('androidEntrypoint: Called on new FlutterEngine');
 

lib/src/service/foreground/base.dart

@@ -3,6 +3,7 @@ import 'package:moxlib/moxlib.dart';
 import 'package:moxxy_native/src/service/config.dart';
 import 'package:moxxy_native/src/service/datasender/types.dart';
 import 'package:moxxy_native/src/service/exceptions.dart';
+import 'package:moxxy_native/src/service/foreground/isolate.dart';
 import 'package:moxxy_native/src/service/foreground/pigeon.dart';
 
 /// Wrapper API that is only available to the UI isolate.
@@ -40,6 +41,8 @@ ForegroundService getForegroundService() {
   if (_service == null) {
     if (Platform.isAndroid) {
       _service = PigeonForegroundService();
+    } else if (Platform.isLinux || Platform.isWindows || Platform.isMacOS) {
+      _service = IsolateForegroundService();
     } else {
       throw UnsupportedPlatformException();
     }

lib/src/service/foreground/isolate.dart

@@ -0,0 +1,98 @@
+import 'dart:async';
+import 'dart:convert';
+import 'dart:isolate';
+import 'dart:ui';
+import 'package:logging/logging.dart';
+import 'package:moxxy_native/src/service/config.dart';
+import 'package:moxxy_native/src/service/datasender/isolate.dart';
+import 'package:moxxy_native/src/service/datasender/types.dart';
+import 'package:moxxy_native/src/service/entrypoints/isolate.dart';
+import 'package:moxxy_native/src/service/foreground/base.dart';
+
+class IsolateForegroundService extends ForegroundService {
+  /// The port on which we receive data from the isolate.
+  final ReceivePort _receivePort = ReceivePort();
+
+  /// The port on which we send data to the isolate.
+  late final SendPort _sendPort;
+
+  /// A completer that indicates when _sendPort has been set.
+  /// For more notes, see the comment in [start].
+  Completer<void>? _sendPortCompleter = Completer<void>();
+
+  /// The data sender backing this class.
+  late final IsolateForegroundServiceDataSender _dataSender;
+
+  /// A logger.
+  final Logger _log = Logger('IsolateForegroundService');
+
+  @override
+  Future<void> attach(
+    HandleEventCallback handleData,
+  ) async {
+    _receivePort.asBroadcastStream().listen((data) async {
+      if (data is SendPort) {
+        // Set the send port.
+        _sendPort = data;
+
+        // Resolve the waiting future.
+        assert(
+          _sendPortCompleter != null,
+          '_sendPort should only be received once!',
+        );
+        _sendPortCompleter?.complete();
+        return;
+      }
+
+      await handleData(
+        jsonDecode(data! as String) as Map<String, dynamic>,
+      );
+    });
+  }
+
+  @override
+  Future<void> start(
+    ServiceConfig config,
+    HandleEventCallback uiHandleData,
+  ) async {
+    // Listen for events
+    await attach(uiHandleData);
+
+    await Isolate.spawn(
+      isolateEntrypoint,
+      [
+        _receivePort.sendPort,
+        config.toString(),
+        RootIsolateToken.instance!,
+      ],
+    );
+
+    // Wait for [_sendPort] to get set.
+    // The issue is that [_receivePort] provides a stream that only one listener can listen to.
+    // This means that we cannot do `await _receivePort.first`. To work around this, we just cram
+    // an approximation of `_receivePort.first` into the actual listener.
+    await _sendPortCompleter!.future;
+    _sendPortCompleter = null;
+
+    // Create the data sender
+    _dataSender = IsolateForegroundServiceDataSender(_sendPort);
+    _log.finest('Background service started...');
+  }
+
+  @override
+  Future<bool> isRunning() async => false;
+
+  @override
+  ForegroundServiceDataSender getDataSender() => _dataSender;
+
+  @override
+  Future<BackgroundEvent?> send(
+    BackgroundCommand command, {
+    bool awaitable = true,
+  }) {
+    return _dataSender.sendData(
+      command,
+      awaitable: awaitable,
+    );
+  }
+}

linux/CMakeLists.txt

@@ -0,0 +1,47 @@
+# The Flutter tooling requires that developers have CMake 3.10 or later
+# installed. You should not increase this version, as doing so will cause
+# the plugin to fail to compile for some customers of the plugin.
+cmake_minimum_required(VERSION 3.10)
+
+# Project-level configuration.
+set(PROJECT_NAME "moxxy_native")
+project(${PROJECT_NAME} LANGUAGES CXX)
+
+# This value is used when generating builds using this plugin, so it must
+# not be changed.
+set(PLUGIN_NAME "moxxy_native_plugin")
+
+# Define the plugin library target. Its name must not be changed (see comment
+# on PLUGIN_NAME above).
+#
+# Any new source files that you add to the plugin should be added here.
+add_library(${PLUGIN_NAME} SHARED
+  "moxxy_native_plugin.cc"
+)
+
+# Apply a standard set of build settings that are configured in the
+# application-level CMakeLists.txt. This can be removed for plugins that want
+# full control over build settings.
+apply_standard_settings(${PLUGIN_NAME})
+
+# Symbols are hidden by default to reduce the chance of accidental conflicts
+# between plugins. This should not be removed; any symbols that should be
+# exported should be explicitly exported with the FLUTTER_PLUGIN_EXPORT macro.
+set_target_properties(${PLUGIN_NAME} PROPERTIES
+  CXX_VISIBILITY_PRESET hidden)
+target_compile_definitions(${PLUGIN_NAME} PRIVATE FLUTTER_PLUGIN_IMPL)
+
+# Source include directories and library dependencies. Add any plugin-specific
+# dependencies here.
+target_include_directories(${PLUGIN_NAME} INTERFACE
+  "${CMAKE_CURRENT_SOURCE_DIR}/include")
+target_link_libraries(${PLUGIN_NAME} PRIVATE flutter)
+target_link_libraries(${PLUGIN_NAME} PRIVATE PkgConfig::GTK)
+
+# List of absolute paths to libraries that should be bundled with the plugin.
+# This list could contain prebuilt libraries, or libraries created by an
+# external build triggered from this build file.
+set(moxxy_native_bundled_libraries
+  ""
+  PARENT_SCOPE
+)

linux/include/moxxy_native/moxxy_native_plugin.h

@@ -0,0 +1,26 @@
+#ifndef FLUTTER_PLUGIN_MOXXY_NATIVE_PLUGIN_H_
+#define FLUTTER_PLUGIN_MOXXY_NATIVE_PLUGIN_H_
+
+#include <flutter_linux/flutter_linux.h>
+
+G_BEGIN_DECLS
+
+#ifdef FLUTTER_PLUGIN_IMPL
+#define FLUTTER_PLUGIN_EXPORT __attribute__((visibility("default")))
+#else
+#define FLUTTER_PLUGIN_EXPORT
+#endif
+
+typedef struct _MoxxyNativePlugin MoxxyNativePlugin;
+typedef struct {
+  GObjectClass parent_class;
+} MoxxyNativePluginClass;
+
+FLUTTER_PLUGIN_EXPORT GType moxxy_native_plugin_get_type();
+
+FLUTTER_PLUGIN_EXPORT void moxxy_native_plugin_register_with_registrar(
+    FlPluginRegistrar* registrar);
+
+G_END_DECLS
+
+#endif  // FLUTTER_PLUGIN_MOXXY_NATIVE_PLUGIN_H_

linux/moxxy_native_plugin.cc

@@ -0,0 +1,70 @@
+#include "include/moxxy_native/moxxy_native_plugin.h"
+
+#include <flutter_linux/flutter_linux.h>
+#include <gtk/gtk.h>
+#include <sys/utsname.h>
+
+#include <cstring>
+
+#define MOXXY_NATIVE_PLUGIN(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj), moxxy_native_plugin_get_type(), \
+                              MoxxyNativePlugin))
+
+struct _MoxxyNativePlugin {
+  GObject parent_instance;
+};
+
+G_DEFINE_TYPE(MoxxyNativePlugin, moxxy_native_plugin, g_object_get_type())
+
+// Called when a method call is received from Flutter.
+static void moxxy_native_plugin_handle_method_call(
+    MoxxyNativePlugin* self,
+    FlMethodCall* method_call) {
+  g_autoptr(FlMethodResponse) response = nullptr;
+
+  const gchar* method = fl_method_call_get_name(method_call);
+
+  if (strcmp(method, "getPlatformVersion") == 0) {
+    struct utsname uname_data = {};
+    uname(&uname_data);
+    g_autofree gchar *version = g_strdup_printf("Linux %s", uname_data.version);
+    g_autoptr(FlValue) result = fl_value_new_string(version);
+    response = FL_METHOD_RESPONSE(fl_method_success_response_new(result));
+  } else {
+    response = FL_METHOD_RESPONSE(fl_method_not_implemented_response_new());
+  }
+
+  fl_method_call_respond(method_call, response, nullptr);
+}
+
+static void moxxy_native_plugin_dispose(GObject* object) {
+  G_OBJECT_CLASS(moxxy_native_plugin_parent_class)->dispose(object);
+}
+
+static void moxxy_native_plugin_class_init(MoxxyNativePluginClass* klass) {
+  G_OBJECT_CLASS(klass)->dispose = moxxy_native_plugin_dispose;
+}
+
+static void moxxy_native_plugin_init(MoxxyNativePlugin* self) {}
+
+static void method_call_cb(FlMethodChannel* channel, FlMethodCall* method_call,
+                           gpointer user_data) {
+  MoxxyNativePlugin* plugin = MOXXY_NATIVE_PLUGIN(user_data);
+  moxxy_native_plugin_handle_method_call(plugin, method_call);
+}
+
+void moxxy_native_plugin_register_with_registrar(FlPluginRegistrar* registrar) {
+  MoxxyNativePlugin* plugin = MOXXY_NATIVE_PLUGIN(
+      g_object_new(moxxy_native_plugin_get_type(), nullptr));
+
+  g_autoptr(FlStandardMethodCodec) codec = fl_standard_method_codec_new();
+  g_autoptr(FlMethodChannel) channel =
+      fl_method_channel_new(fl_plugin_registrar_get_messenger(registrar),
+                            "moxxy_native",
+                            FL_METHOD_CODEC(codec));
+  fl_method_channel_set_method_call_handler(channel, method_call_cb,
+                                            g_object_ref(plugin),
+                                            g_object_unref);
+
+  g_object_unref(plugin);
+}

pubspec.yaml

@@ -1,6 +1,6 @@
 name: moxxy_native
 description: Interactions with the system for Moxxy
-version: 0.1.0
+version: 0.2.0
 publish_to: https://git.polynom.me/api/packages/Moxxy/pub
 homepage: 
 
@@ -29,3 +29,5 @@ flutter:
       android:
         package: org.moxxy.moxxy_native
         pluginClass: MoxxyNativePlugin
+      linux:
+        pluginClass: MoxxyNativePlugin