[infra_ui][keyboard] Impl keyboard platform interface

app_flowy/packages/flowy_infra_ui/platform_interface/keyboard_platform_interface/.gitignore

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+# Miscellaneous
+*.class
+*.log
+*.pyc
+*.swp
+.DS_Store
+.atom/
+.buildlog/
+.history
+.svn/
+
+# IntelliJ related
+*.iml
+*.ipr
+*.iws
+.idea/
+
+# The .vscode folder contains launch configuration and tasks you configure in
+# VS Code which you may wish to be included in version control, so this line
+# is commented out by default.
+#.vscode/
+
+# Flutter/Dart/Pub related
+**/doc/api/
+.dart_tool/
+.flutter-plugins
+.flutter-plugins-dependencies
+.packages
+.pub-cache/
+.pub/
+build/
+
+# Android related
+**/android/**/gradle-wrapper.jar
+**/android/.gradle
+**/android/captures/
+**/android/gradlew
+**/android/gradlew.bat
+**/android/local.properties
+**/android/**/GeneratedPluginRegistrant.java
+
+# iOS/XCode related
+**/ios/**/*.mode1v3
+**/ios/**/*.mode2v3
+**/ios/**/*.moved-aside
+**/ios/**/*.pbxuser
+**/ios/**/*.perspectivev3
+**/ios/**/*sync/
+**/ios/**/.sconsign.dblite
+**/ios/**/.tags*
+**/ios/**/.vagrant/
+**/ios/**/DerivedData/
+**/ios/**/Icon?
+**/ios/**/Pods/
+**/ios/**/.symlinks/
+**/ios/**/profile
+**/ios/**/xcuserdata
+**/ios/.generated/
+**/ios/Flutter/App.framework
+**/ios/Flutter/Flutter.framework
+**/ios/Flutter/Flutter.podspec
+**/ios/Flutter/Generated.xcconfig
+**/ios/Flutter/ephemeral
+**/ios/Flutter/app.flx
+**/ios/Flutter/app.zip
+**/ios/Flutter/flutter_assets/
+**/ios/Flutter/flutter_export_environment.sh
+**/ios/ServiceDefinitions.json
+**/ios/Runner/GeneratedPluginRegistrant.*
+
+# Exceptions to above rules.
+!**/ios/**/default.mode1v3
+!**/ios/**/default.mode2v3
+!**/ios/**/default.pbxuser
+!**/ios/**/default.perspectivev3

app_flowy/packages/flowy_infra_ui/platform_interface/keyboard_platform_interface/.metadata

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+# This file tracks properties of this Flutter project.
+# Used by Flutter tool to assess capabilities and perform upgrades etc.
+#
+# This file should be version controlled and should not be manually edited.
+
+version:
+  revision: fa5883b78e566877613ad1ccb48dd92075cb5c23
+  channel: dev
+
+project_type: package

app_flowy/packages/flowy_infra_ui/platform_interface/keyboard_platform_interface/CHANGELOG.md

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+## 0.0.1
+
+* TODO: Describe initial release.

app_flowy/packages/flowy_infra_ui/platform_interface/keyboard_platform_interface/LICENSE

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+TODO: Add your license here.

app_flowy/packages/flowy_infra_ui/platform_interface/keyboard_platform_interface/README.md

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+# keyboard_platform_interface
+
+A new Flutter package project.
+
+## Getting Started
+
+This project is a starting point for a Dart
+[package](https://flutter.dev/developing-packages/),
+a library module containing code that can be shared easily across
+multiple Flutter or Dart projects.
+
+For help getting started with Flutter, view our 
+[online documentation](https://flutter.dev/docs), which offers tutorials, 
+samples, guidance on mobile development, and a full API reference.

app_flowy/packages/flowy_infra_ui/platform_interface/keyboard_platform_interface/analysis_options.yaml

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+include: package:flutter_lints/flutter.yaml
+
+# Additional information about this file can be found at
+# https://dart.dev/guides/language/analysis-options

app_flowy/packages/flowy_infra_ui/platform_interface/keyboard_platform_interface/lib/keyboard_platform_interface.dart

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+library keyboard_platform_interface;
+
+import 'package:plugin_platform_interface/plugin_platform_interface.dart';
+import 'src/method_channel_keyboard.dart';
+
+abstract class KeyboardPlatform extends PlatformInterface {
+  KeyboardPlatform() : super(token: _token);
+
+  static final Object _token = Object();
+
+  static KeyboardPlatform _instance = MethodChannelKeyboard();
+
+  static KeyboardPlatform get instance => _instance;
+
+  static set instance(KeyboardPlatform instance) {
+    PlatformInterface.verifyToken(instance, _token);
+    _instance = instance;
+  }
+
+  Stream<bool> get onKeyboardChange {
+    throw UnimplementedError('`onKeyboardChange` should be overrided by subclass.');
+  }
+}

app_flowy/packages/flowy_infra_ui/platform_interface/keyboard_platform_interface/lib/src/method_channel_keyboard.dart

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+import 'dart:html';
+
+import 'package:flutter/services.dart';
+
+import '../keyboard_platform_interface.dart';
+
+// ignore: constant_identifier_names
+const INFRA_UI_KEYBOARD_EVENT_CHANNEL_NAME = "flowy_infra_ui_event/keyboard";
+
+class MethodChannelKeyboard extends KeyboardPlatform {
+  final EventChannel _keyboardChannel = const EventChannel(INFRA_UI_KEYBOARD_EVENT_CHANNEL_NAME);
+
+  late final Stream<bool> _onKeyboardChange = _keyboardChannel.receiveBroadcastStream().map((event) => event as bool);
+
+  @override
+  Stream<bool> get onKeyboardChange => _onKeyboardChange;
+}

app_flowy/packages/flowy_infra_ui/platform_interface/keyboard_platform_interface/pubspec.lock

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+# Generated by pub
+# See https://dart.dev/tools/pub/glossary#lockfile
+packages:
+  async:
+    dependency: transitive
+    description:
+      name: async
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.6.1"
+  boolean_selector:
+    dependency: transitive
+    description:
+      name: boolean_selector
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.0"
+  characters:
+    dependency: transitive
+    description:
+      name: characters
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0"
+  charcode:
+    dependency: transitive
+    description:
+      name: charcode
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.2.0"
+  clock:
+    dependency: transitive
+    description:
+      name: clock
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0"
+  collection:
+    dependency: transitive
+    description:
+      name: collection
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.15.0"
+  fake_async:
+    dependency: transitive
+    description:
+      name: fake_async
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.2.0"
+  flutter:
+    dependency: "direct main"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  flutter_lints:
+    dependency: "direct dev"
+    description:
+      name: flutter_lints
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.4"
+  flutter_test:
+    dependency: "direct dev"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  lints:
+    dependency: transitive
+    description:
+      name: lints
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.1"
+  matcher:
+    dependency: transitive
+    description:
+      name: matcher
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.12.10"
+  meta:
+    dependency: transitive
+    description:
+      name: meta
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.3.0"
+  path:
+    dependency: transitive
+    description:
+      name: path
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.8.0"
+  plugin_platform_interface:
+    dependency: "direct main"
+    description:
+      name: plugin_platform_interface
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.1"
+  sky_engine:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.99"
+  source_span:
+    dependency: transitive
+    description:
+      name: source_span
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.8.1"
+  stack_trace:
+    dependency: transitive
+    description:
+      name: stack_trace
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.10.0"
+  stream_channel:
+    dependency: transitive
+    description:
+      name: stream_channel
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.0"
+  string_scanner:
+    dependency: transitive
+    description:
+      name: string_scanner
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0"
+  term_glyph:
+    dependency: transitive
+    description:
+      name: term_glyph
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.2.0"
+  test_api:
+    dependency: transitive
+    description:
+      name: test_api
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.3.0"
+  typed_data:
+    dependency: transitive
+    description:
+      name: typed_data
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.3.0"
+  vector_math:
+    dependency: transitive
+    description:
+      name: vector_math
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.0"
+sdks:
+  dart: ">=2.12.0 <3.0.0"
+  flutter: ">=1.17.0"

app_flowy/packages/flowy_infra_ui/platform_interface/keyboard_platform_interface/pubspec.yaml

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+name: keyboard_platform_interface
+description: A new Flutter package project.
+version: 0.0.1
+homepage:
+
+environment:
+  sdk: ">=2.12.0 <3.0.0"
+  flutter: ">=1.17.0"
+
+dependencies:
+  flutter:
+    sdk: flutter
+    
+  plugin_platform_interface: ^2.0.0
+
+dev_dependencies:
+  flutter_test:
+    sdk: flutter
+  flutter_lints: ^1.0.0
+
+flutter:

app_flowy/packages/flowy_infra_ui/platform_interface/keyboard_platform_interface/test/keyboard_platform_interface_test.dart

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+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:keyboard_platform_interface/keyboard_platform_interface.dart';
+
+void main() {}