vnc_viewer/lib/rfb/remote_frame_buffer_gesture_detector.dart

import 'dart:isolate';
import 'dart:ui';

import 'package:flutter/widgets.dart' hide Image;
import 'remote_frame_buffer_isolate_messages.dart';
import 'package:fpdart/fpdart.dart';

class RemoteFrameBufferGestureDetector extends GestureDetector {
  final Image _image;
  final Size _remoteFrameBufferWidgetSize;
  final Option<SendPort> _sendPort;
  final bool _isFullscreen;

  RemoteFrameBufferGestureDetector({
    super.key,
    required final Image image,
    required final Size remoteFrameBufferWidgetSize,
    required final Option<SendPort> sendPort,
    required final bool isFullscreen,
    super.child,
  })  : _image = image,
        _remoteFrameBufferWidgetSize = remoteFrameBufferWidgetSize,
        _sendPort = sendPort,
        _isFullscreen = isFullscreen;

  @override
  GestureTapDownCallback? get onSecondaryTapDown =>
      (final TapDownDetails details) => _sendPort.match(
            () {},
            (final SendPort sendPort) => sendPort.send(
              RemoteFrameBufferIsolateSendMessage.pointerEvent(
                button1Down: false,
                button2Down: false,
                button3Down: true,
                button4Down: false,
                button5Down: false,
                button6Down: false,
                button7Down: false,
                button8Down: false,
                x: _isFullscreen ? details.localPosition.dx.toInt() : (details.localPosition.dx /
                        _remoteFrameBufferWidgetSize.width *
                        _image.width)
                    .toInt(),
                y: _isFullscreen ? details.localPosition.dy.toInt() : (details.localPosition.dy /
                        _remoteFrameBufferWidgetSize.height *
                        _image.height)
                    .toInt(),
              ),
            ),
          );

  @override
  GestureTapUpCallback? get onSecondaryTapUp =>
      (final TapUpDetails details) => _sendPort.match(
            () {},
            (final SendPort sendPort) => sendPort.send(
              RemoteFrameBufferIsolateSendMessage.pointerEvent(
                button1Down: false,
                button2Down: false,
                button3Down: false,
                button4Down: false,
                button5Down: false,
                button6Down: false,
                button7Down: false,
                button8Down: false,
                x: _isFullscreen ? details.localPosition.dx.toInt() : (details.localPosition.dx /
                    _remoteFrameBufferWidgetSize.width *
                    _image.width)
                    .toInt(),
                y: _isFullscreen ? details.localPosition.dy.toInt() : (details.localPosition.dy /
                    _remoteFrameBufferWidgetSize.height *
                    _image.height)
                    .toInt(),
              ),
            ),
          );

  @override
  GestureTapDownCallback? get onTapDown =>
      (final TapDownDetails details) => _sendPort.match(
            () {},
            (final SendPort sendPort) => sendPort.send(
              RemoteFrameBufferIsolateSendMessage.pointerEvent(
                button1Down: true,
                button2Down: false,
                button3Down: false,
                button4Down: false,
                button5Down: false,
                button6Down: false,
                button7Down: false,
                button8Down: false,
                x: _isFullscreen ? details.localPosition.dx.toInt() : (details.localPosition.dx /
                    _remoteFrameBufferWidgetSize.width *
                    _image.width)
                    .toInt(),
                y: _isFullscreen ? details.localPosition.dy.toInt() : (details.localPosition.dy /
                    _remoteFrameBufferWidgetSize.height *
                    _image.height)
                    .toInt(),
              ),
            ),
          );

  @override
  GestureTapUpCallback? get onTapUp =>
      (final TapUpDetails details) => _sendPort.match(
            () {},
            (final SendPort sendPort) => sendPort.send(
              RemoteFrameBufferIsolateSendMessage.pointerEvent(
                button1Down: false,
                button2Down: false,
                button3Down: false,
                button4Down: false,
                button5Down: false,
                button6Down: false,
                button7Down: false,
                button8Down: false,
                x: _isFullscreen ? details.localPosition.dx.toInt() : (details.localPosition.dx /
                    _remoteFrameBufferWidgetSize.width *
                    _image.width)
                    .toInt(),
                y: _isFullscreen ? details.localPosition.dy.toInt() : (details.localPosition.dy /
                    _remoteFrameBufferWidgetSize.height *
                    _image.height)
                    .toInt(),
              ),
            ),
          );
}