migrate to darssh2

README.md

@@ -30,6 +30,12 @@ A new Flutter project which provide a chart view to display server status data.
   </tr>
 </table>
 
+# Support
+Status|Platform 
+--|--|
+Full Support|Android/iOS/macOS
+Support, but not tested|Windows/Linux
+
 ## Milestone
 - [x] SSH connect
 - [x] Server info store
@@ -39,8 +45,8 @@ A new Flutter project which provide a chart view to display server status data.
 - [x] Server status detail page
 - [x] Theme switch
 - [x] Execute snippet
-- [ ] Migrate from `ssh2` to `dartssh2`
+- [x] Migrate from `ssh2` to `dartssh2`
-- [ ] Desktop support
+- [x] Desktop support
 
 ## Build
 Please use `make.dart` to build.

ios/Podfile.lock

@@ -2,51 +2,38 @@ PODS:
   - countly_flutter (20.11.4):
     - Flutter
   - Flutter (1.0.0)
-  - GZ-NMSSH (4.1.5)
+  - path_provider_ios (0.0.1):
-  - path_provider (0.0.1):
     - Flutter
   - r_upgrade (0.0.1):
     - Flutter
-  - ssh2 (2.2.3):
+  - url_launcher_ios (0.0.1):
-    - Flutter
-    - GZ-NMSSH (~> 4.1.5)
-  - url_launcher (0.0.1):
     - Flutter
 
 DEPENDENCIES:
   - countly_flutter (from `.symlinks/plugins/countly_flutter/ios`)
   - Flutter (from `Flutter`)
-  - path_provider (from `.symlinks/plugins/path_provider/ios`)
+  - path_provider_ios (from `.symlinks/plugins/path_provider_ios/ios`)
   - r_upgrade (from `.symlinks/plugins/r_upgrade/ios`)
-  - ssh2 (from `.symlinks/plugins/ssh2/ios`)
+  - url_launcher_ios (from `.symlinks/plugins/url_launcher_ios/ios`)
-  - url_launcher (from `.symlinks/plugins/url_launcher/ios`)
-
-SPEC REPOS:
-  trunk:
-    - GZ-NMSSH
 
 EXTERNAL SOURCES:
   countly_flutter:
     :path: ".symlinks/plugins/countly_flutter/ios"
   Flutter:
     :path: Flutter
-  path_provider:
+  path_provider_ios:
-    :path: ".symlinks/plugins/path_provider/ios"
+    :path: ".symlinks/plugins/path_provider_ios/ios"
   r_upgrade:
     :path: ".symlinks/plugins/r_upgrade/ios"
-  ssh2:
+  url_launcher_ios:
-    :path: ".symlinks/plugins/ssh2/ios"
+    :path: ".symlinks/plugins/url_launcher_ios/ios"
-  url_launcher:
-    :path: ".symlinks/plugins/url_launcher/ios"
 
 SPEC CHECKSUMS:
   countly_flutter: 38419412e193a1faa5babeb5d28a63fda260687d
   Flutter: 50d75fe2f02b26cc09d224853bb45737f8b3214a
-  GZ-NMSSH: d749f8ae2fd0094b953cd1d5abd8e0cab3c93f8d
+  path_provider_ios: 7d7ce634493af4477d156294792024ec3485acd5
-  path_provider: d1e9807085df1f9cc9318206cd649dc0b76be3de
   r_upgrade: 44d715c61914cce3d01ea225abffe894fd51c114
-  ssh2: 74165efc99417a075ecafd52caf93edadfb5eb60
+  url_launcher_ios: 02f1989d4e14e998335b02b67a7590fa34f971af
-  url_launcher: b6e016d912f04be9f5bf6e8e82dc599b7ba59649
 
 PODFILE CHECKSUM: aafe91acc616949ddb318b77800a7f51bffa2a4c
 

ios/Runner.xcodeproj/project.pbxproj

@@ -362,7 +362,7 @@
 					"$(inherited)",
 					"@executable_path/Frameworks",
 				);
-				PRODUCT_BUNDLE_IDENTIFIER = tech.lolli.toolbox;
+				PRODUCT_BUNDLE_IDENTIFIER = com.lollipopkit.toolbox;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
 				SWIFT_VERSION = 5.0;
@@ -491,7 +491,7 @@
 					"$(inherited)",
 					"@executable_path/Frameworks",
 				);
-				PRODUCT_BUNDLE_IDENTIFIER = tech.lolli.toolbox;
+				PRODUCT_BUNDLE_IDENTIFIER = com.lollipopkit.toolbox;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
@@ -514,7 +514,7 @@
 					"$(inherited)",
 					"@executable_path/Frameworks",
 				);
-				PRODUCT_BUNDLE_IDENTIFIER = tech.lolli.toolbox;
+				PRODUCT_BUNDLE_IDENTIFIER = com.lollipopkit.toolbox;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
 				SWIFT_VERSION = 5.0;

ios/Runner/Info.plist

@@ -1,45 +1,45 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
-	<dict>
+<dict>
-		<key>CFBundleDevelopmentRegion</key>
+	<key>CFBundleDevelopmentRegion</key>
-		<string>$(DEVELOPMENT_LANGUAGE)</string>
+	<string>$(DEVELOPMENT_LANGUAGE)</string>
-		<key>CFBundleExecutable</key>
+	<key>CFBundleExecutable</key>
-		<string>$(EXECUTABLE_NAME)</string>
+	<string>$(EXECUTABLE_NAME)</string>
-		<key>CFBundleIdentifier</key>
+	<key>CFBundleIdentifier</key>
-		<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
-		<key>CFBundleInfoDictionaryVersion</key>
+	<key>CFBundleInfoDictionaryVersion</key>
-		<string>6.0</string>
+	<string>6.0</string>
-		<key>CFBundleName</key>
+	<key>CFBundleName</key>
-		<string>toolbox</string>
+	<string>ServerBox</string>
-		<key>CFBundlePackageType</key>
+	<key>CFBundlePackageType</key>
-		<string>APPL</string>
+	<string>APPL</string>
-		<key>CFBundleShortVersionString</key>
+	<key>CFBundleShortVersionString</key>
-		<string>$(FLUTTER_BUILD_NAME)</string>
+	<string>$(FLUTTER_BUILD_NAME)</string>
-		<key>CFBundleSignature</key>
+	<key>CFBundleSignature</key>
-		<string>????</string>
+	<string>????</string>
-		<key>CFBundleVersion</key>
+	<key>CFBundleVersion</key>
-		<string>$(FLUTTER_BUILD_NUMBER)</string>
+	<string>$(FLUTTER_BUILD_NUMBER)</string>
-		<key>LSRequiresIPhoneOS</key>
+	<key>LSRequiresIPhoneOS</key>
-		<true/>
+	<true/>
-		<key>UILaunchStoryboardName</key>
+	<key>UILaunchStoryboardName</key>
-		<string>LaunchScreen</string>
+	<string>LaunchScreen</string>
-		<key>UIMainStoryboardFile</key>
+	<key>UIMainStoryboardFile</key>
-		<string>Main</string>
+	<string>Main</string>
-		<key>UISupportedInterfaceOrientations</key>
+	<key>UIStatusBarHidden</key>
-		<array>
+	<false/>
-			<string>UIInterfaceOrientationPortrait</string>
+	<key>UISupportedInterfaceOrientations</key>
-		</array>
+	<array>
-		<key>UISupportedInterfaceOrientations~ipad</key>
+		<string>UIInterfaceOrientationPortrait</string>
-		<array>
+	</array>
-			<string>UIInterfaceOrientationPortrait</string>
+	<key>UISupportedInterfaceOrientations~ipad</key>
-			<string>UIInterfaceOrientationPortraitUpsideDown</string>
+	<array>
-			<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationPortrait</string>
-			<string>UIInterfaceOrientationLandscapeRight</string>
+		<string>UIInterfaceOrientationPortraitUpsideDown</string>
-		</array>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
-		<key>UIViewControllerBasedStatusBarAppearance</key>
+		<string>UIInterfaceOrientationLandscapeRight</string>
-		<false/>
+	</array>
-		<key>UIStatusBarHidden</key>
+	<key>UIViewControllerBasedStatusBarAppearance</key>
-		<false/>
+	<false/>
-	</dict>
+</dict>
-</plist>
+</plist>

lib/core/update.dart

@@ -47,7 +47,9 @@ Future<void> doUpdate(BuildContext context, {bool force = false}) async {
       await RUpgrade.upgrade(update.android,
           fileName: update.android.split('/').last, isAutoRequestInstall: true);
     } else if (Platform.isIOS) {
-      showSnackBar(context, const Text('Not support iOS now.'));
+      await RUpgrade.upgradeFromAppStore('1586449703');
+    } else if (Platform.isMacOS) {
+      await RUpgrade.upgradeFromUrl(update.mac);
     }
   });
 }

lib/data/model/app/update.dart

@@ -13,8 +13,12 @@ class AppUpdate {
 */
 
   late int newest;
+  late int iosbuild;
+  late int androidbuild;
+  late int macbuild;
   late String android;
   late String ios;
+  late String mac;
   late int min;
   late String changelog;
 
@@ -27,6 +31,9 @@ class AppUpdate {
   });
   AppUpdate.fromJson(Map<String, dynamic> json) {
     newest = json["newest"]?.toInt();
+    newest = json["macbuild"]?.toInt();
+    newest = json["iosbuild"]?.toInt();
+    newest = json["androidbuild"]?.toInt();
     android = json["android"].toString();
     ios = json["ios"].toString();
     min = json["min"].toInt();
@@ -35,6 +42,9 @@ class AppUpdate {
   Map<String, dynamic> toJson() {
     final Map<String, dynamic> data = <String, dynamic>{};
     data["newest"] = newest;
+    data["macbuild"] = macbuild;
+    data["iosbuild"] = iosbuild;
+    data["androidbuild"] = androidbuild;
     data["android"] = android;
     data["ios"] = ios;
     data["min"] = min;

lib/data/model/server/server.dart

@@ -1,4 +1,4 @@
-import 'package:ssh2/ssh2.dart';
+import 'package:dartssh2/dartssh2.dart';
 import 'package:toolbox/data/model/server/server_connection_state.dart';
 import 'package:toolbox/data/model/server/server_private_info.dart';
 import 'package:toolbox/data/model/server/server_status.dart';
@@ -6,7 +6,7 @@ import 'package:toolbox/data/model/server/server_status.dart';
 class ServerInfo {
   ServerPrivateInfo info;
   ServerStatus status;
-  SSHClient client;
+  SSHClient? client;
   ServerConnectionState connectionState;
 
   ServerInfo(this.info, this.status, this.client, this.connectionState);

lib/data/provider/server.dart

@@ -1,7 +1,8 @@
 import 'dart:async';
+import 'dart:convert';
 
+import 'package:dartssh2/dartssh2.dart';
 import 'package:logging/logging.dart';
-import 'package:ssh2/ssh2.dart';
 import 'package:toolbox/core/extension/stringx.dart';
 import 'package:toolbox/core/provider_base.dart';
 import 'package:toolbox/data/model/server/cpu_2_status.dart';
@@ -59,15 +60,21 @@ class ServerProvider extends BusyProvider {
 
   ServerInfo genInfo(ServerPrivateInfo spi) {
     return ServerInfo(
-        spi, emptyStatus, genClient(spi), ServerConnectionState.disconnected);
+        spi, emptyStatus, null, ServerConnectionState.disconnected);
   }
 
-  SSHClient genClient(ServerPrivateInfo spi) {
+  Future<SSHClient> genClient(ServerPrivateInfo spi) async {
-    return SSHClient(
+    final socket = await SSHSocket.connect(spi.ip, spi.port);
-        host: spi.ip,
+    if (spi.authorization is String) {
-        port: spi.port,
+      return SSHClient(socket,
+          username: spi.user,
+          onPasswordRequest: () => spi.authorization as String);
+    }
+    final auth = spi.authorization as Map<String, dynamic>;
+    return SSHClient(socket,
         username: spi.user,
-        passwordOrKey: spi.authorization);
+        identities: SSHKeyPair.fromPem(auth['privateKey'],
+            auth['passphrase']));
   }
 
   Future<void> refreshData({int? idx}) async {
@@ -123,10 +130,11 @@ class ServerProvider extends BusyProvider {
     notifyListeners();
   }
 
-  void updateServer(ServerPrivateInfo old, ServerPrivateInfo newInfo) {
+  Future<void> updateServer(
+      ServerPrivateInfo old, ServerPrivateInfo newInfo) async {
     final idx = _servers.indexWhere((e) => e.info == old);
     _servers[idx].info = newInfo;
-    _servers[idx].client = genClient(newInfo);
+    _servers[idx].client = await genClient(newInfo);
     locator<ServerStore>().update(old, newInfo);
     notifyListeners();
     refreshData(idx: idx);
@@ -134,7 +142,7 @@ class ServerProvider extends BusyProvider {
 
   Future<ServerStatus?> _getData(ServerPrivateInfo info, int idx) async {
     final client = _servers[idx].client;
-    final connected = await client.isConnected();
+    final connected = client != null;
     final state = _servers[idx].connectionState;
     if (!connected ||
         state == ServerConnectionState.failed ||
@@ -143,7 +151,7 @@ class ServerProvider extends BusyProvider {
       notifyListeners();
       final time1 = DateTime.now();
       try {
-        await client.connect();
+        _servers[idx].client = await genClient(info);
         final time2 = DateTime.now();
         logger.info(
             'Connected to [${info.name}] in [${time2.difference(time1).toString()}].');
@@ -151,24 +159,24 @@ class ServerProvider extends BusyProvider {
         notifyListeners();
       } catch (e) {
         _servers[idx].connectionState = ServerConnectionState.failed;
-        _servers[idx].status.failedInfo = e.toString().split(', ')[1];
+        _servers[idx].status.failedInfo = e.toString();
         notifyListeners();
         logger.warning(e);
       }
     }
     try {
-      final cpu = await client.execute("cat /proc/stat | grep cpu") ?? '';
+      if (!connected) return null;
-      final cpuTemp = await client.execute(
+      final cpu = utf8.decode(await client!.run("cat /proc/stat | grep cpu"));
-              r"paste <(cat /sys/class/thermal/thermal_zone*/type) <(cat /sys/class/thermal/thermal_zone*/temp) | column -s $'\t' -t | sed 's/\(.\)..$/.\1°C/'") ??
+      final cpuTemp = utf8.decode(await client.run(
-          '';
+          r"paste <(cat /sys/class/thermal/thermal_zone*/type) <(cat /sys/class/thermal/thermal_zone*/temp) | column -s $'\t' -t | sed 's/\(.\)..$/.\1°C/'"));
-      final mem = await client.execute('free -m') ?? '';
+      final mem = utf8.decode(await client.run('free -m'));
-      final sysVer =
+      final sysVer = utf8
-          await client.execute('cat /etc/os-release | grep PRETTY_NAME') ?? '';
+          .decode(await client.run('cat /etc/os-release | grep PRETTY_NAME'));
-      final upTime = await client.execute('uptime') ?? '';
+      final upTime = utf8.decode(await client.run('uptime'));
-      final disk = await client.execute('df -h') ?? '';
+      final disk = utf8.decode(await client.run('df -h'));
-      final tcp = await client.execute('cat /proc/net/snmp') ?? '';
+      final tcp = utf8.decode(await client.run('cat /proc/net/snmp'));
       final netSpeed =
-          await client.execute('cat /proc/net/dev && date +%s') ?? '';
+          utf8.decode(await client.run('cat /proc/net/dev && date +%s'));
 
       return ServerStatus(
           _getCPU(cpu, _servers[idx].status.cpu2Status, cpuTemp),
@@ -303,7 +311,8 @@ class ServerProvider extends BusyProvider {
     return emptyMemory;
   }
 
-  Future<String?> runSnippet(int idx, Snippet snippet) {
+  Future<String?> runSnippet(int idx, Snippet snippet) async {
-    return _servers[idx].client.execute(snippet.script);
+    final result = await _servers[idx].client!.run(snippet.script);
+    return utf8.decode(result);
   }
 }

lib/view/page/server/detail.dart

@@ -36,7 +36,7 @@ class _ServerDetailPageState extends State<ServerDetailPage>
   Widget build(BuildContext context) {
     return Consumer<ServerProvider>(builder: (_, provider, __) {
       return _buildMainPage(
-          provider.servers.firstWhere((e) => e.client.id == widget.id));
+          provider.servers.firstWhere((e) => '${e.info.ip}:${e.info.port}' == widget.id));
     });
   }
 

lib/view/page/server/tab.dart

@@ -119,7 +119,7 @@ class _ServerPageState extends State<ServerPage>
               _buildRealServerCard(si.status, si.info.name, si.connectionState),
         ),
         onTap: () =>
-            AppRoute(ServerDetailPage(si.client.id!), 'server detail page')
+            AppRoute(ServerDetailPage('${si.info.ip}:${si.info.port}'), 'server detail page')
                 .go(context),
       ),
     );

linux/.gitignore

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

linux/CMakeLists.txt

@@ -0,0 +1,116 @@
+cmake_minimum_required(VERSION 3.10)
+project(runner LANGUAGES CXX)
+
+set(BINARY_NAME "toolbox")
+set(APPLICATION_ID "tech.lolli.toolbox")
+
+cmake_policy(SET CMP0063 NEW)
+
+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 ${CMAKE_SYSROOT})
+  set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+  set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
+  set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+  set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+endif()
+
+# Configure build options.
+if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
+  set(CMAKE_BUILD_TYPE "Debug" CACHE
+    STRING "Flutter build mode" FORCE)
+  set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS
+    "Debug" "Profile" "Release")
+endif()
+
+# Compilation settings that should be applied to most targets.
+function(APPLY_STANDARD_SETTINGS TARGET)
+  target_compile_features(${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:$<CONFIG:Debug>>:NDEBUG>")
+endfunction()
+
+set(FLUTTER_MANAGED_DIR "${CMAKE_CURRENT_SOURCE_DIR}/flutter")
+
+# Flutter library and tool build rules.
+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}")
+
+# Application build
+add_executable(${BINARY_NAME}
+  "main.cc"
+  "my_application.cc"
+  "${FLUTTER_MANAGED_DIR}/generated_plugin_registrant.cc"
+)
+apply_standard_settings(${BINARY_NAME})
+target_link_libraries(${BINARY_NAME} PRIVATE flutter)
+target_link_libraries(${BINARY_NAME} PRIVATE PkgConfig::GTK)
+add_dependencies(${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)
+
+if(PLUGIN_BUNDLED_LIBRARIES)
+  install(FILES "${PLUGIN_BUNDLED_LIBRARIES}"
+    DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
+    COMPONENT Runtime)
+endif()
+
+# 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()

linux/flutter/CMakeLists.txt

@@ -0,0 +1,87 @@
+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}
+)

linux/flutter/generated_plugin_registrant.cc

@@ -0,0 +1,15 @@
+//
+//  Generated file. Do not edit.
+//
+
+// clang-format off
+
+#include "generated_plugin_registrant.h"
+
+#include <url_launcher_linux/url_launcher_plugin.h>
+
+void fl_register_plugins(FlPluginRegistry* registry) {
+  g_autoptr(FlPluginRegistrar) url_launcher_linux_registrar =
+      fl_plugin_registry_get_registrar_for_plugin(registry, "UrlLauncherPlugin");
+  url_launcher_plugin_register_with_registrar(url_launcher_linux_registrar);
+}

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_

linux/flutter/generated_plugins.cmake

@@ -0,0 +1,16 @@
+#
+# Generated file, do not edit.
+#
+
+list(APPEND FLUTTER_PLUGIN_LIST
+  url_launcher_linux
+)
+
+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)

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);
+}

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, "ServerBox");
+    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, "ServerBox");
+  }
+
+  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));
+}

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_

macos/Runner/DebugProfile.entitlements

@@ -8,5 +8,7 @@
 	<true/>
 	<key>com.apple.security.network.server</key>
 	<true/>
+	<key>com.apple.security.network.client</key>
+	<true/>
 </dict>
 </plist>

macos/Runner/MainFlutterWindow.swift

@@ -4,7 +4,8 @@ import FlutterMacOS
 class MainFlutterWindow: NSWindow {
   override func awakeFromNib() {
     let flutterViewController = FlutterViewController.init()
-    let windowFrame = self.frame
+    var windowFrame = self.frame
+    windowFrame.size = CGSize(width: 270, height: 480)
     self.contentViewController = flutterViewController
     self.setFrame(windowFrame, display: true)
 

macos/Runner/Release.entitlements

@@ -4,5 +4,7 @@
 <dict>
 	<key>com.apple.security.app-sandbox</key>
 	<true/>
+	<key>com.apple.security.network.client</key>
+	<true/>
 </dict>
 </plist>

pubspec.lock

@@ -14,7 +14,7 @@ packages:
       name: archive
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.1.6"
+    version: "3.1.8"
   args:
     dependency: transitive
     description:
@@ -22,6 +22,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.3.0"
+  asn1lib:
+    dependency: transitive
+    description:
+      name: asn1lib
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.3"
   async:
     dependency: transitive
     description:
@@ -80,6 +87,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.15.0"
+  convert:
+    dependency: transitive
+    description:
+      name: convert
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.0.1"
   countly_flutter:
     dependency: "direct main"
     description:
@@ -96,13 +110,27 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "3.0.1"
+  dart_console:
+    dependency: transitive
+    description:
+      name: dart_console
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.0"
+  dartssh2:
+    dependency: "direct main"
+    description:
+      name: dartssh2
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.0-pre"
   dio:
     dependency: "direct main"
     description:
       name: dio
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "4.0.1"
+    version: "4.0.4"
   extended_image:
     dependency: "direct main"
     description:
@@ -116,7 +144,7 @@ packages:
       name: extended_image_library
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.1.0"
+    version: "3.1.1"
   fading_edge_scrollview:
     dependency: transitive
     description:
@@ -170,14 +198,14 @@ packages:
       name: flutter_native_splash
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.1"
+    version: "1.3.3"
   flutter_plugin_android_lifecycle:
     dependency: transitive
     description:
       name: flutter_plugin_android_lifecycle
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.4"
+    version: "2.0.5"
   flutter_staggered_animations:
     dependency: "direct main"
     description:
@@ -208,7 +236,7 @@ packages:
       name: hive
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.4"
+    version: "2.0.5"
   hive_flutter:
     dependency: "direct main"
     description:
@@ -243,7 +271,7 @@ packages:
       name: image
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.0.8"
+    version: "3.1.0"
   js:
     dependency: transitive
     description:
@@ -306,35 +334,49 @@ packages:
       name: path_provider
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.6"
+    version: "2.0.8"
+  path_provider_android:
+    dependency: transitive
+    description:
+      name: path_provider_android
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.11"
+  path_provider_ios:
+    dependency: transitive
+    description:
+      name: path_provider_ios
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.7"
   path_provider_linux:
     dependency: transitive
     description:
       name: path_provider_linux
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0"
+    version: "2.1.4"
   path_provider_macos:
     dependency: transitive
     description:
       name: path_provider_macos
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.2"
+    version: "2.0.4"
   path_provider_platform_interface:
     dependency: transitive
     description:
       name: path_provider_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.1"
+    version: "2.0.2"
   path_provider_windows:
     dependency: transitive
     description:
       name: path_provider_windows
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.3"
+    version: "2.0.4"
   pedantic:
     dependency: transitive
     description:
@@ -349,20 +391,34 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "4.4.0"
+  pinenacl:
+    dependency: transitive
+    description:
+      name: pinenacl
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.3.3"
   platform:
     dependency: transitive
     description:
       name: platform
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.0.2"
+    version: "3.1.0"
   plugin_platform_interface:
     dependency: transitive
     description:
       name: plugin_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.2"
+    version: "2.1.2"
+  pointycastle:
+    dependency: transitive
+    description:
+      name: pointycastle
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.5.0"
   process:
     dependency: transitive
     description:
@@ -376,7 +432,7 @@ packages:
       name: provider
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "6.0.1"
+    version: "6.0.2"
   pull_to_refresh:
     dependency: "direct main"
     description:
@@ -390,7 +446,7 @@ packages:
       name: r_upgrade
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.3.6"
+    version: "0.3.7+2"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -403,13 +459,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.8.1"
-  ssh2:
-    dependency: "direct main"
-    description:
-      name: ssh2
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.2.3"
   stack_trace:
     dependency: transitive
     description:
@@ -465,7 +514,21 @@ packages:
       name: url_launcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "6.0.12"
+    version: "6.0.17"
+  url_launcher_android:
+    dependency: transitive
+    description:
+      name: url_launcher_android
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "6.0.13"
+  url_launcher_ios:
+    dependency: transitive
+    description:
+      name: url_launcher_ios
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "6.0.13"
   url_launcher_linux:
     dependency: transitive
     description:
@@ -486,14 +549,14 @@ packages:
       name: url_launcher_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.4"
+    version: "2.0.5"
   url_launcher_web:
     dependency: transitive
     description:
       name: url_launcher_web
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.4"
+    version: "2.0.5"
   url_launcher_windows:
     dependency: transitive
     description:
@@ -501,13 +564,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.0.2"
-  uuid:
+  validators:
     dependency: transitive
     description:
-      name: uuid
+      name: validators
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.0.5"
+    version: "3.0.0"
   vector_math:
     dependency: transitive
     description:
@@ -521,7 +584,7 @@ packages:
       name: win32
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.2.10"
+    version: "2.3.3"
   xdg_directories:
     dependency: transitive
     description:
@@ -544,5 +607,5 @@ packages:
     source: hosted
     version: "3.1.0"
 sdks:
-  dart: ">=2.14.0 <3.0.0"
+  dart: ">=2.15.1 <3.0.0"
   flutter: ">=2.5.0"

pubspec.yaml

@@ -43,7 +43,7 @@ dependencies:
     git: 
       url: https://github.com/Countly/countly-sdk-flutter-bridge.git
       ref: master
-  ssh2: ^2.2.3
+  dartssh2: ^2.1.0-pre
   logging: ^1.0.2
   flutter_material_color_picker: ^1.1.0+2
   circle_chart: 

web/index.html

@@ -26,7 +26,7 @@
   <meta name="apple-mobile-web-app-title" content="toolbox">
   <link rel="apple-touch-icon" href="icons/Icon-192.png">
 
-  <title>toolbox</title>
+  <title>ServerBox</title>
   <link rel="manifest" href="manifest.json">
   <link rel="stylesheet" type="text/css" href="splash/style.css">
 </head>

windows/.gitignore

@@ -0,0 +1,17 @@
+flutter/ephemeral/
+
+# Visual Studio user-specific files.
+*.suo
+*.user
+*.userosscache
+*.sln.docstates
+
+# Visual Studio build-related files.
+x64/
+x86/
+
+# Visual Studio cache files
+# files ending in .cache can be ignored
+*.[Cc]ache
+# but keep track of directories ending in .cache
+!*.[Cc]ache/

windows/CMakeLists.txt

@@ -0,0 +1,95 @@
+cmake_minimum_required(VERSION 3.14)
+project(toolbox LANGUAGES CXX)
+
+set(BINARY_NAME "ServerBox")
+
+cmake_policy(SET CMP0063 NEW)
+
+set(CMAKE_INSTALL_RPATH "$ORIGIN/lib")
+
+# Configure build options.
+get_property(IS_MULTICONFIG GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+if(IS_MULTICONFIG)
+  set(CMAKE_CONFIGURATION_TYPES "Debug;Profile;Release"
+    CACHE STRING "" FORCE)
+else()
+  if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
+    set(CMAKE_BUILD_TYPE "Debug" CACHE
+      STRING "Flutter build mode" FORCE)
+    set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS
+      "Debug" "Profile" "Release")
+  endif()
+endif()
+
+set(CMAKE_EXE_LINKER_FLAGS_PROFILE "${CMAKE_EXE_LINKER_FLAGS_RELEASE}")
+set(CMAKE_SHARED_LINKER_FLAGS_PROFILE "${CMAKE_SHARED_LINKER_FLAGS_RELEASE}")
+set(CMAKE_C_FLAGS_PROFILE "${CMAKE_C_FLAGS_RELEASE}")
+set(CMAKE_CXX_FLAGS_PROFILE "${CMAKE_CXX_FLAGS_RELEASE}")
+
+# Use Unicode for all projects.
+add_definitions(-DUNICODE -D_UNICODE)
+
+# Compilation settings that should be applied to most targets.
+function(APPLY_STANDARD_SETTINGS TARGET)
+  target_compile_features(${TARGET} PUBLIC cxx_std_17)
+  target_compile_options(${TARGET} PRIVATE /W4 /WX /wd"4100")
+  target_compile_options(${TARGET} PRIVATE /EHsc)
+  target_compile_definitions(${TARGET} PRIVATE "_HAS_EXCEPTIONS=0")
+  target_compile_definitions(${TARGET} PRIVATE "$<$<CONFIG:Debug>:_DEBUG>")
+endfunction()
+
+set(FLUTTER_MANAGED_DIR "${CMAKE_CURRENT_SOURCE_DIR}/flutter")
+
+# Flutter library and tool build rules.
+add_subdirectory(${FLUTTER_MANAGED_DIR})
+
+# Application build
+add_subdirectory("runner")
+
+# Generated plugin build rules, which manage building the plugins and adding
+# them to the application.
+include(flutter/generated_plugins.cmake)
+
+
+# === Installation ===
+# Support files are copied into place next to the executable, so that it can
+# run in place. This is done instead of making a separate bundle (as on Linux)
+# so that building and running from within Visual Studio will work.
+set(BUILD_BUNDLE_DIR "$<TARGET_FILE_DIR:${BINARY_NAME}>")
+# Make the "install" step default, as it's required to run.
+set(CMAKE_VS_INCLUDE_INSTALL_TO_DEFAULT_BUILD 1)
+if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
+  set(CMAKE_INSTALL_PREFIX "${BUILD_BUNDLE_DIR}" CACHE PATH "..." FORCE)
+endif()
+
+set(INSTALL_BUNDLE_DATA_DIR "${CMAKE_INSTALL_PREFIX}/data")
+set(INSTALL_BUNDLE_LIB_DIR "${CMAKE_INSTALL_PREFIX}")
+
+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)
+
+if(PLUGIN_BUNDLED_LIBRARIES)
+  install(FILES "${PLUGIN_BUNDLED_LIBRARIES}"
+    DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
+    COMPONENT Runtime)
+endif()
+
+# 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 "${INSTALL_BUNDLE_DATA_DIR}" COMPONENT Runtime)
+
+# Install the AOT library on non-Debug builds only.
+install(FILES "${AOT_LIBRARY}" DESTINATION "${INSTALL_BUNDLE_DATA_DIR}"
+  CONFIGURATIONS Profile;Release
+  COMPONENT Runtime)

windows/flutter/CMakeLists.txt

@@ -0,0 +1,103 @@
+cmake_minimum_required(VERSION 3.14)
+
+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.
+set(WRAPPER_ROOT "${EPHEMERAL_DIR}/cpp_client_wrapper")
+
+# === Flutter Library ===
+set(FLUTTER_LIBRARY "${EPHEMERAL_DIR}/flutter_windows.dll")
+
+# 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/windows/app.so" PARENT_SCOPE)
+
+list(APPEND FLUTTER_LIBRARY_HEADERS
+  "flutter_export.h"
+  "flutter_windows.h"
+  "flutter_messenger.h"
+  "flutter_plugin_registrar.h"
+  "flutter_texture_registrar.h"
+)
+list(TRANSFORM FLUTTER_LIBRARY_HEADERS PREPEND "${EPHEMERAL_DIR}/")
+add_library(flutter INTERFACE)
+target_include_directories(flutter INTERFACE
+  "${EPHEMERAL_DIR}"
+)
+target_link_libraries(flutter INTERFACE "${FLUTTER_LIBRARY}.lib")
+add_dependencies(flutter flutter_assemble)
+
+# === Wrapper ===
+list(APPEND CPP_WRAPPER_SOURCES_CORE
+  "core_implementations.cc"
+  "standard_codec.cc"
+)
+list(TRANSFORM CPP_WRAPPER_SOURCES_CORE PREPEND "${WRAPPER_ROOT}/")
+list(APPEND CPP_WRAPPER_SOURCES_PLUGIN
+  "plugin_registrar.cc"
+)
+list(TRANSFORM CPP_WRAPPER_SOURCES_PLUGIN PREPEND "${WRAPPER_ROOT}/")
+list(APPEND CPP_WRAPPER_SOURCES_APP
+  "flutter_engine.cc"
+  "flutter_view_controller.cc"
+)
+list(TRANSFORM CPP_WRAPPER_SOURCES_APP PREPEND "${WRAPPER_ROOT}/")
+
+# Wrapper sources needed for a plugin.
+add_library(flutter_wrapper_plugin STATIC
+  ${CPP_WRAPPER_SOURCES_CORE}
+  ${CPP_WRAPPER_SOURCES_PLUGIN}
+)
+apply_standard_settings(flutter_wrapper_plugin)
+set_target_properties(flutter_wrapper_plugin PROPERTIES
+  POSITION_INDEPENDENT_CODE ON)
+set_target_properties(flutter_wrapper_plugin PROPERTIES
+  CXX_VISIBILITY_PRESET hidden)
+target_link_libraries(flutter_wrapper_plugin PUBLIC flutter)
+target_include_directories(flutter_wrapper_plugin PUBLIC
+  "${WRAPPER_ROOT}/include"
+)
+add_dependencies(flutter_wrapper_plugin flutter_assemble)
+
+# Wrapper sources needed for the runner.
+add_library(flutter_wrapper_app STATIC
+  ${CPP_WRAPPER_SOURCES_CORE}
+  ${CPP_WRAPPER_SOURCES_APP}
+)
+apply_standard_settings(flutter_wrapper_app)
+target_link_libraries(flutter_wrapper_app PUBLIC flutter)
+target_include_directories(flutter_wrapper_app PUBLIC
+  "${WRAPPER_ROOT}/include"
+)
+add_dependencies(flutter_wrapper_app 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.
+set(PHONY_OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/_phony_")
+set_source_files_properties("${PHONY_OUTPUT}" PROPERTIES SYMBOLIC TRUE)
+add_custom_command(
+  OUTPUT ${FLUTTER_LIBRARY} ${FLUTTER_LIBRARY_HEADERS}
+    ${CPP_WRAPPER_SOURCES_CORE} ${CPP_WRAPPER_SOURCES_PLUGIN}
+    ${CPP_WRAPPER_SOURCES_APP}
+    ${PHONY_OUTPUT}
+  COMMAND ${CMAKE_COMMAND} -E env
+    ${FLUTTER_TOOL_ENVIRONMENT}
+    "${FLUTTER_ROOT}/packages/flutter_tools/bin/tool_backend.bat"
+      windows-x64 $<CONFIG>
+  VERBATIM
+)
+add_custom_target(flutter_assemble DEPENDS
+  "${FLUTTER_LIBRARY}"
+  ${FLUTTER_LIBRARY_HEADERS}
+  ${CPP_WRAPPER_SOURCES_CORE}
+  ${CPP_WRAPPER_SOURCES_PLUGIN}
+  ${CPP_WRAPPER_SOURCES_APP}
+)

windows/flutter/generated_plugin_registrant.cc

@@ -0,0 +1,14 @@
+//
+//  Generated file. Do not edit.
+//
+
+// clang-format off
+
+#include "generated_plugin_registrant.h"
+
+#include <url_launcher_windows/url_launcher_windows.h>
+
+void RegisterPlugins(flutter::PluginRegistry* registry) {
+  UrlLauncherWindowsRegisterWithRegistrar(
+      registry->GetRegistrarForPlugin("UrlLauncherWindows"));
+}

windows/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/plugin_registry.h>
+
+// Registers Flutter plugins.
+void RegisterPlugins(flutter::PluginRegistry* registry);
+
+#endif  // GENERATED_PLUGIN_REGISTRANT_

windows/flutter/generated_plugins.cmake

@@ -0,0 +1,16 @@
+#
+# Generated file, do not edit.
+#
+
+list(APPEND FLUTTER_PLUGIN_LIST
+  url_launcher_windows
+)
+
+set(PLUGIN_BUNDLED_LIBRARIES)
+
+foreach(plugin ${FLUTTER_PLUGIN_LIST})
+  add_subdirectory(flutter/ephemeral/.plugin_symlinks/${plugin}/windows 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)

windows/runner/CMakeLists.txt

@@ -0,0 +1,17 @@
+cmake_minimum_required(VERSION 3.14)
+project(runner LANGUAGES CXX)
+
+add_executable(${BINARY_NAME} WIN32
+  "flutter_window.cpp"
+  "main.cpp"
+  "utils.cpp"
+  "win32_window.cpp"
+  "${FLUTTER_MANAGED_DIR}/generated_plugin_registrant.cc"
+  "Runner.rc"
+  "runner.exe.manifest"
+)
+apply_standard_settings(${BINARY_NAME})
+target_compile_definitions(${BINARY_NAME} PRIVATE "NOMINMAX")
+target_link_libraries(${BINARY_NAME} PRIVATE flutter flutter_wrapper_app)
+target_include_directories(${BINARY_NAME} PRIVATE "${CMAKE_SOURCE_DIR}")
+add_dependencies(${BINARY_NAME} flutter_assemble)

windows/runner/Runner.rc

@@ -0,0 +1,121 @@
+// Microsoft Visual C++ generated resource script.
+//
+#pragma code_page(65001)
+#include "resource.h"
+
+#define APSTUDIO_READONLY_SYMBOLS
+/////////////////////////////////////////////////////////////////////////////
+//
+// Generated from the TEXTINCLUDE 2 resource.
+//
+#include "winres.h"
+
+/////////////////////////////////////////////////////////////////////////////
+#undef APSTUDIO_READONLY_SYMBOLS
+
+/////////////////////////////////////////////////////////////////////////////
+// English (United States) resources
+
+#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU)
+LANGUAGE LANG_ENGLISH, SUBLANG_ENGLISH_US
+
+#ifdef APSTUDIO_INVOKED
+/////////////////////////////////////////////////////////////////////////////
+//
+// TEXTINCLUDE
+//
+
+1 TEXTINCLUDE
+BEGIN
+    "resource.h\0"
+END
+
+2 TEXTINCLUDE
+BEGIN
+    "#include ""winres.h""\r\n"
+    "\0"
+END
+
+3 TEXTINCLUDE
+BEGIN
+    "\r\n"
+    "\0"
+END
+
+#endif    // APSTUDIO_INVOKED
+
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// Icon
+//
+
+// Icon with lowest ID value placed first to ensure application icon
+// remains consistent on all systems.
+IDI_APP_ICON            ICON                    "resources\\app_icon.ico"
+
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// Version
+//
+
+#ifdef FLUTTER_BUILD_NUMBER
+#define VERSION_AS_NUMBER FLUTTER_BUILD_NUMBER
+#else
+#define VERSION_AS_NUMBER 1,0,0
+#endif
+
+#ifdef FLUTTER_BUILD_NAME
+#define VERSION_AS_STRING #FLUTTER_BUILD_NAME
+#else
+#define VERSION_AS_STRING "1.0.0"
+#endif
+
+VS_VERSION_INFO VERSIONINFO
+ FILEVERSION VERSION_AS_NUMBER
+ PRODUCTVERSION VERSION_AS_NUMBER
+ FILEFLAGSMASK VS_FFI_FILEFLAGSMASK
+#ifdef _DEBUG
+ FILEFLAGS VS_FF_DEBUG
+#else
+ FILEFLAGS 0x0L
+#endif
+ FILEOS VOS__WINDOWS32
+ FILETYPE VFT_APP
+ FILESUBTYPE 0x0L
+BEGIN
+    BLOCK "StringFileInfo"
+    BEGIN
+        BLOCK "040904e4"
+        BEGIN
+            VALUE "CompanyName", "tech.lolli" "\0"
+            VALUE "FileDescription", "A new Flutter project." "\0"
+            VALUE "FileVersion", VERSION_AS_STRING "\0"
+            VALUE "InternalName", "toolbox" "\0"
+            VALUE "LegalCopyright", "Copyright (C) 2022 tech.lolli. All rights reserved." "\0"
+            VALUE "OriginalFilename", "toolbox.exe" "\0"
+            VALUE "ProductName", "toolbox" "\0"
+            VALUE "ProductVersion", VERSION_AS_STRING "\0"
+        END
+    END
+    BLOCK "VarFileInfo"
+    BEGIN
+        VALUE "Translation", 0x409, 1252
+    END
+END
+
+#endif    // English (United States) resources
+/////////////////////////////////////////////////////////////////////////////
+
+
+
+#ifndef APSTUDIO_INVOKED
+/////////////////////////////////////////////////////////////////////////////
+//
+// Generated from the TEXTINCLUDE 3 resource.
+//
+
+
+/////////////////////////////////////////////////////////////////////////////
+#endif    // not APSTUDIO_INVOKED

windows/runner/flutter_window.cpp

@@ -0,0 +1,61 @@
+#include "flutter_window.h"
+
+#include <optional>
+
+#include "flutter/generated_plugin_registrant.h"
+
+FlutterWindow::FlutterWindow(const flutter::DartProject& project)
+    : project_(project) {}
+
+FlutterWindow::~FlutterWindow() {}
+
+bool FlutterWindow::OnCreate() {
+  if (!Win32Window::OnCreate()) {
+    return false;
+  }
+
+  RECT frame = GetClientArea();
+
+  // The size here must match the window dimensions to avoid unnecessary surface
+  // creation / destruction in the startup path.
+  flutter_controller_ = std::make_unique<flutter::FlutterViewController>(
+      frame.right - frame.left, frame.bottom - frame.top, project_);
+  // Ensure that basic setup of the controller was successful.
+  if (!flutter_controller_->engine() || !flutter_controller_->view()) {
+    return false;
+  }
+  RegisterPlugins(flutter_controller_->engine());
+  SetChildContent(flutter_controller_->view()->GetNativeWindow());
+  return true;
+}
+
+void FlutterWindow::OnDestroy() {
+  if (flutter_controller_) {
+    flutter_controller_ = nullptr;
+  }
+
+  Win32Window::OnDestroy();
+}
+
+LRESULT
+FlutterWindow::MessageHandler(HWND hwnd, UINT const message,
+                              WPARAM const wparam,
+                              LPARAM const lparam) noexcept {
+  // Give Flutter, including plugins, an opportunity to handle window messages.
+  if (flutter_controller_) {
+    std::optional<LRESULT> result =
+        flutter_controller_->HandleTopLevelWindowProc(hwnd, message, wparam,
+                                                      lparam);
+    if (result) {
+      return *result;
+    }
+  }
+
+  switch (message) {
+    case WM_FONTCHANGE:
+      flutter_controller_->engine()->ReloadSystemFonts();
+      break;
+  }
+
+  return Win32Window::MessageHandler(hwnd, message, wparam, lparam);
+}

windows/runner/flutter_window.h

@@ -0,0 +1,33 @@
+#ifndef RUNNER_FLUTTER_WINDOW_H_
+#define RUNNER_FLUTTER_WINDOW_H_
+
+#include <flutter/dart_project.h>
+#include <flutter/flutter_view_controller.h>
+
+#include <memory>
+
+#include "win32_window.h"
+
+// A window that does nothing but host a Flutter view.
+class FlutterWindow : public Win32Window {
+ public:
+  // Creates a new FlutterWindow hosting a Flutter view running |project|.
+  explicit FlutterWindow(const flutter::DartProject& project);
+  virtual ~FlutterWindow();
+
+ protected:
+  // Win32Window:
+  bool OnCreate() override;
+  void OnDestroy() override;
+  LRESULT MessageHandler(HWND window, UINT const message, WPARAM const wparam,
+                         LPARAM const lparam) noexcept override;
+
+ private:
+  // The project to run.
+  flutter::DartProject project_;
+
+  // The Flutter instance hosted by this window.
+  std::unique_ptr<flutter::FlutterViewController> flutter_controller_;
+};
+
+#endif  // RUNNER_FLUTTER_WINDOW_H_

windows/runner/main.cpp

@@ -0,0 +1,43 @@
+#include <flutter/dart_project.h>
+#include <flutter/flutter_view_controller.h>
+#include <windows.h>
+
+#include "flutter_window.h"
+#include "utils.h"
+
+int APIENTRY wWinMain(_In_ HINSTANCE instance, _In_opt_ HINSTANCE prev,
+                      _In_ wchar_t *command_line, _In_ int show_command) {
+  // Attach to console when present (e.g., 'flutter run') or create a
+  // new console when running with a debugger.
+  if (!::AttachConsole(ATTACH_PARENT_PROCESS) && ::IsDebuggerPresent()) {
+    CreateAndAttachConsole();
+  }
+
+  // Initialize COM, so that it is available for use in the library and/or
+  // plugins.
+  ::CoInitializeEx(nullptr, COINIT_APARTMENTTHREADED);
+
+  flutter::DartProject project(L"data");
+
+  std::vector<std::string> command_line_arguments =
+      GetCommandLineArguments();
+
+  project.set_dart_entrypoint_arguments(std::move(command_line_arguments));
+
+  FlutterWindow window(project);
+  Win32Window::Point origin(10, 10);
+  Win32Window::Size size(1280, 720);
+  if (!window.CreateAndShow(L"toolbox", origin, size)) {
+    return EXIT_FAILURE;
+  }
+  window.SetQuitOnClose(true);
+
+  ::MSG msg;
+  while (::GetMessage(&msg, nullptr, 0, 0)) {
+    ::TranslateMessage(&msg);
+    ::DispatchMessage(&msg);
+  }
+
+  ::CoUninitialize();
+  return EXIT_SUCCESS;
+}

windows/runner/resource.h

@@ -0,0 +1,16 @@
+//{{NO_DEPENDENCIES}}
+// Microsoft Visual C++ generated include file.
+// Used by Runner.rc
+//
+#define IDI_APP_ICON                    101
+
+// Next default values for new objects
+//
+#ifdef APSTUDIO_INVOKED
+#ifndef APSTUDIO_READONLY_SYMBOLS
+#define _APS_NEXT_RESOURCE_VALUE        102
+#define _APS_NEXT_COMMAND_VALUE         40001
+#define _APS_NEXT_CONTROL_VALUE         1001
+#define _APS_NEXT_SYMED_VALUE           101
+#endif
+#endif

windows/runner/runner.exe.manifest

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
+  <application xmlns="urn:schemas-microsoft-com:asm.v3">
+    <windowsSettings>
+      <dpiAwareness xmlns="http://schemas.microsoft.com/SMI/2016/WindowsSettings">PerMonitorV2</dpiAwareness>
+    </windowsSettings>
+  </application>
+  <compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
+    <application>
+      <!-- Windows 10 -->
+      <supportedOS Id="{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}"/>
+      <!-- Windows 8.1 -->
+      <supportedOS Id="{1f676c76-80e1-4239-95bb-83d0f6d0da78}"/>
+      <!-- Windows 8 -->
+      <supportedOS Id="{4a2f28e3-53b9-4441-ba9c-d69d4a4a6e38}"/>
+      <!-- Windows 7 -->
+      <supportedOS Id="{35138b9a-5d96-4fbd-8e2d-a2440225f93a}"/>
+    </application>
+  </compatibility>
+</assembly>

windows/runner/utils.cpp

@@ -0,0 +1,64 @@
+#include "utils.h"
+
+#include <flutter_windows.h>
+#include <io.h>
+#include <stdio.h>
+#include <windows.h>
+
+#include <iostream>
+
+void CreateAndAttachConsole() {
+  if (::AllocConsole()) {
+    FILE *unused;
+    if (freopen_s(&unused, "CONOUT$", "w", stdout)) {
+      _dup2(_fileno(stdout), 1);
+    }
+    if (freopen_s(&unused, "CONOUT$", "w", stderr)) {
+      _dup2(_fileno(stdout), 2);
+    }
+    std::ios::sync_with_stdio();
+    FlutterDesktopResyncOutputStreams();
+  }
+}
+
+std::vector<std::string> GetCommandLineArguments() {
+  // Convert the UTF-16 command line arguments to UTF-8 for the Engine to use.
+  int argc;
+  wchar_t** argv = ::CommandLineToArgvW(::GetCommandLineW(), &argc);
+  if (argv == nullptr) {
+    return std::vector<std::string>();
+  }
+
+  std::vector<std::string> command_line_arguments;
+
+  // Skip the first argument as it's the binary name.
+  for (int i = 1; i < argc; i++) {
+    command_line_arguments.push_back(Utf8FromUtf16(argv[i]));
+  }
+
+  ::LocalFree(argv);
+
+  return command_line_arguments;
+}
+
+std::string Utf8FromUtf16(const wchar_t* utf16_string) {
+  if (utf16_string == nullptr) {
+    return std::string();
+  }
+  int target_length = ::WideCharToMultiByte(
+      CP_UTF8, WC_ERR_INVALID_CHARS, utf16_string,
+      -1, nullptr, 0, nullptr, nullptr);
+  if (target_length == 0) {
+    return std::string();
+  }
+  std::string utf8_string;
+  utf8_string.resize(target_length);
+  int converted_length = ::WideCharToMultiByte(
+      CP_UTF8, WC_ERR_INVALID_CHARS, utf16_string,
+      -1, utf8_string.data(),
+      target_length, nullptr, nullptr);
+  if (converted_length == 0) {
+    return std::string();
+  }
+  return utf8_string;
+}

windows/runner/utils.h

@@ -0,0 +1,19 @@
+#ifndef RUNNER_UTILS_H_
+#define RUNNER_UTILS_H_
+
+#include <string>
+#include <vector>
+
+// Creates a console for the process, and redirects stdout and stderr to
+// it for both the runner and the Flutter library.
+void CreateAndAttachConsole();
+
+// Takes a null-terminated wchar_t* encoded in UTF-16 and returns a std::string
+// encoded in UTF-8. Returns an empty std::string on failure.
+std::string Utf8FromUtf16(const wchar_t* utf16_string);
+
+// Gets the command line arguments passed in as a std::vector<std::string>,
+// encoded in UTF-8. Returns an empty std::vector<std::string> on failure.
+std::vector<std::string> GetCommandLineArguments();
+
+#endif  // RUNNER_UTILS_H_

windows/runner/win32_window.cpp

@@ -0,0 +1,245 @@
+#include "win32_window.h"
+
+#include <flutter_windows.h>
+
+#include "resource.h"
+
+namespace {
+
+constexpr const wchar_t kWindowClassName[] = L"FLUTTER_RUNNER_WIN32_WINDOW";
+
+// The number of Win32Window objects that currently exist.
+static int g_active_window_count = 0;
+
+using EnableNonClientDpiScaling = BOOL __stdcall(HWND hwnd);
+
+// Scale helper to convert logical scaler values to physical using passed in
+// scale factor
+int Scale(int source, double scale_factor) {
+  return static_cast<int>(source * scale_factor);
+}
+
+// Dynamically loads the |EnableNonClientDpiScaling| from the User32 module.
+// This API is only needed for PerMonitor V1 awareness mode.
+void EnableFullDpiSupportIfAvailable(HWND hwnd) {
+  HMODULE user32_module = LoadLibraryA("User32.dll");
+  if (!user32_module) {
+    return;
+  }
+  auto enable_non_client_dpi_scaling =
+      reinterpret_cast<EnableNonClientDpiScaling*>(
+          GetProcAddress(user32_module, "EnableNonClientDpiScaling"));
+  if (enable_non_client_dpi_scaling != nullptr) {
+    enable_non_client_dpi_scaling(hwnd);
+    FreeLibrary(user32_module);
+  }
+}
+
+}  // namespace
+
+// Manages the Win32Window's window class registration.
+class WindowClassRegistrar {
+ public:
+  ~WindowClassRegistrar() = default;
+
+  // Returns the singleton registar instance.
+  static WindowClassRegistrar* GetInstance() {
+    if (!instance_) {
+      instance_ = new WindowClassRegistrar();
+    }
+    return instance_;
+  }
+
+  // Returns the name of the window class, registering the class if it hasn't
+  // previously been registered.
+  const wchar_t* GetWindowClass();
+
+  // Unregisters the window class. Should only be called if there are no
+  // instances of the window.
+  void UnregisterWindowClass();
+
+ private:
+  WindowClassRegistrar() = default;
+
+  static WindowClassRegistrar* instance_;
+
+  bool class_registered_ = false;
+};
+
+WindowClassRegistrar* WindowClassRegistrar::instance_ = nullptr;
+
+const wchar_t* WindowClassRegistrar::GetWindowClass() {
+  if (!class_registered_) {
+    WNDCLASS window_class{};
+    window_class.hCursor = LoadCursor(nullptr, IDC_ARROW);
+    window_class.lpszClassName = kWindowClassName;
+    window_class.style = CS_HREDRAW | CS_VREDRAW;
+    window_class.cbClsExtra = 0;
+    window_class.cbWndExtra = 0;
+    window_class.hInstance = GetModuleHandle(nullptr);
+    window_class.hIcon =
+        LoadIcon(window_class.hInstance, MAKEINTRESOURCE(IDI_APP_ICON));
+    window_class.hbrBackground = 0;
+    window_class.lpszMenuName = nullptr;
+    window_class.lpfnWndProc = Win32Window::WndProc;
+    RegisterClass(&window_class);
+    class_registered_ = true;
+  }
+  return kWindowClassName;
+}
+
+void WindowClassRegistrar::UnregisterWindowClass() {
+  UnregisterClass(kWindowClassName, nullptr);
+  class_registered_ = false;
+}
+
+Win32Window::Win32Window() {
+  ++g_active_window_count;
+}
+
+Win32Window::~Win32Window() {
+  --g_active_window_count;
+  Destroy();
+}
+
+bool Win32Window::CreateAndShow(const std::wstring& title,
+                                const Point& origin,
+                                const Size& size) {
+  Destroy();
+
+  const wchar_t* window_class =
+      WindowClassRegistrar::GetInstance()->GetWindowClass();
+
+  const POINT target_point = {static_cast<LONG>(origin.x),
+                              static_cast<LONG>(origin.y)};
+  HMONITOR monitor = MonitorFromPoint(target_point, MONITOR_DEFAULTTONEAREST);
+  UINT dpi = FlutterDesktopGetDpiForMonitor(monitor);
+  double scale_factor = dpi / 96.0;
+
+  HWND window = CreateWindow(
+      window_class, title.c_str(), WS_OVERLAPPEDWINDOW | WS_VISIBLE,
+      Scale(origin.x, scale_factor), Scale(origin.y, scale_factor),
+      Scale(size.width, scale_factor), Scale(size.height, scale_factor),
+      nullptr, nullptr, GetModuleHandle(nullptr), this);
+
+  if (!window) {
+    return false;
+  }
+
+  return OnCreate();
+}
+
+// static
+LRESULT CALLBACK Win32Window::WndProc(HWND const window,
+                                      UINT const message,
+                                      WPARAM const wparam,
+                                      LPARAM const lparam) noexcept {
+  if (message == WM_NCCREATE) {
+    auto window_struct = reinterpret_cast<CREATESTRUCT*>(lparam);
+    SetWindowLongPtr(window, GWLP_USERDATA,
+                     reinterpret_cast<LONG_PTR>(window_struct->lpCreateParams));
+
+    auto that = static_cast<Win32Window*>(window_struct->lpCreateParams);
+    EnableFullDpiSupportIfAvailable(window);
+    that->window_handle_ = window;
+  } else if (Win32Window* that = GetThisFromHandle(window)) {
+    return that->MessageHandler(window, message, wparam, lparam);
+  }
+
+  return DefWindowProc(window, message, wparam, lparam);
+}
+
+LRESULT
+Win32Window::MessageHandler(HWND hwnd,
+                            UINT const message,
+                            WPARAM const wparam,
+                            LPARAM const lparam) noexcept {
+  switch (message) {
+    case WM_DESTROY:
+      window_handle_ = nullptr;
+      Destroy();
+      if (quit_on_close_) {
+        PostQuitMessage(0);
+      }
+      return 0;
+
+    case WM_DPICHANGED: {
+      auto newRectSize = reinterpret_cast<RECT*>(lparam);
+      LONG newWidth = newRectSize->right - newRectSize->left;
+      LONG newHeight = newRectSize->bottom - newRectSize->top;
+
+      SetWindowPos(hwnd, nullptr, newRectSize->left, newRectSize->top, newWidth,
+                   newHeight, SWP_NOZORDER | SWP_NOACTIVATE);
+
+      return 0;
+    }
+    case WM_SIZE: {
+      RECT rect = GetClientArea();
+      if (child_content_ != nullptr) {
+        // Size and position the child window.
+        MoveWindow(child_content_, rect.left, rect.top, rect.right - rect.left,
+                   rect.bottom - rect.top, TRUE);
+      }
+      return 0;
+    }
+
+    case WM_ACTIVATE:
+      if (child_content_ != nullptr) {
+        SetFocus(child_content_);
+      }
+      return 0;
+  }
+
+  return DefWindowProc(window_handle_, message, wparam, lparam);
+}
+
+void Win32Window::Destroy() {
+  OnDestroy();
+
+  if (window_handle_) {
+    DestroyWindow(window_handle_);
+    window_handle_ = nullptr;
+  }
+  if (g_active_window_count == 0) {
+    WindowClassRegistrar::GetInstance()->UnregisterWindowClass();
+  }
+}
+
+Win32Window* Win32Window::GetThisFromHandle(HWND const window) noexcept {
+  return reinterpret_cast<Win32Window*>(
+      GetWindowLongPtr(window, GWLP_USERDATA));
+}
+
+void Win32Window::SetChildContent(HWND content) {
+  child_content_ = content;
+  SetParent(content, window_handle_);
+  RECT frame = GetClientArea();
+
+  MoveWindow(content, frame.left, frame.top, frame.right - frame.left,
+             frame.bottom - frame.top, true);
+
+  SetFocus(child_content_);
+}
+
+RECT Win32Window::GetClientArea() {
+  RECT frame;
+  GetClientRect(window_handle_, &frame);
+  return frame;
+}
+
+HWND Win32Window::GetHandle() {
+  return window_handle_;
+}
+
+void Win32Window::SetQuitOnClose(bool quit_on_close) {
+  quit_on_close_ = quit_on_close;
+}
+
+bool Win32Window::OnCreate() {
+  // No-op; provided for subclasses.
+  return true;
+}
+
+void Win32Window::OnDestroy() {
+  // No-op; provided for subclasses.
+}

windows/runner/win32_window.h

@@ -0,0 +1,98 @@
+#ifndef RUNNER_WIN32_WINDOW_H_
+#define RUNNER_WIN32_WINDOW_H_
+
+#include <windows.h>
+
+#include <functional>
+#include <memory>
+#include <string>
+
+// A class abstraction for a high DPI-aware Win32 Window. Intended to be
+// inherited from by classes that wish to specialize with custom
+// rendering and input handling
+class Win32Window {
+ public:
+  struct Point {
+    unsigned int x;
+    unsigned int y;
+    Point(unsigned int x, unsigned int y) : x(x), y(y) {}
+  };
+
+  struct Size {
+    unsigned int width;
+    unsigned int height;
+    Size(unsigned int width, unsigned int height)
+        : width(width), height(height) {}
+  };
+
+  Win32Window();
+  virtual ~Win32Window();
+
+  // Creates and shows a win32 window with |title| and position and size using
+  // |origin| and |size|. New windows are created on the default monitor. Window
+  // sizes are specified to the OS in physical pixels, hence to ensure a
+  // consistent size to will treat the width height passed in to this function
+  // as logical pixels and scale to appropriate for the default monitor. Returns
+  // true if the window was created successfully.
+  bool CreateAndShow(const std::wstring& title,
+                     const Point& origin,
+                     const Size& size);
+
+  // Release OS resources associated with window.
+  void Destroy();
+
+  // Inserts |content| into the window tree.
+  void SetChildContent(HWND content);
+
+  // Returns the backing Window handle to enable clients to set icon and other
+  // window properties. Returns nullptr if the window has been destroyed.
+  HWND GetHandle();
+
+  // If true, closing this window will quit the application.
+  void SetQuitOnClose(bool quit_on_close);
+
+  // Return a RECT representing the bounds of the current client area.
+  RECT GetClientArea();
+
+ protected:
+  // Processes and route salient window messages for mouse handling,
+  // size change and DPI. Delegates handling of these to member overloads that
+  // inheriting classes can handle.
+  virtual LRESULT MessageHandler(HWND window,
+                                 UINT const message,
+                                 WPARAM const wparam,
+                                 LPARAM const lparam) noexcept;
+
+  // Called when CreateAndShow is called, allowing subclass window-related
+  // setup. Subclasses should return false if setup fails.
+  virtual bool OnCreate();
+
+  // Called when Destroy is called.
+  virtual void OnDestroy();
+
+ private:
+  friend class WindowClassRegistrar;
+
+  // OS callback called by message pump. Handles the WM_NCCREATE message which
+  // is passed when the non-client area is being created and enables automatic
+  // non-client DPI scaling so that the non-client area automatically
+  // responsponds to changes in DPI. All other messages are handled by
+  // MessageHandler.
+  static LRESULT CALLBACK WndProc(HWND const window,
+                                  UINT const message,
+                                  WPARAM const wparam,
+                                  LPARAM const lparam) noexcept;
+
+  // Retrieves a class instance pointer for |window|
+  static Win32Window* GetThisFromHandle(HWND const window) noexcept;
+
+  bool quit_on_close_ = false;
+
+  // window handle for top level window.
+  HWND window_handle_ = nullptr;
+
+  // window handle for hosted content.
+  HWND child_content_ = nullptr;
+};
+
+#endif  // RUNNER_WIN32_WINDOW_H_