flutter_vid/lib/us/vid_us_2d_visual.dart

import 'dart:typed_data';
import 'package:vid/us/vid_us_data_reader.dart';
import 'package:vid/us/vid_us_data_writer.dart';
import 'package:vid/us/vid_us_display_mode.dart';
import 'package:vid/us/vid_us_logical_coordinate.dart';
import 'package:vid/us/vid_us_mode.dart';
import 'package:vid/us/vid_us_physical_coordinate.dart';
import 'package:vid/us/vid_us_visual.dart';
import 'package:vid/us/vid_us_visual_area_type.dart';
import 'package:vid/us/vid_us_visual_indicator.dart';
import 'package:vid/us/vid_us_visual_type.dart';

class VidUs2DVisual extends VidUsVisual {
  late Map<VidUsVisualAreaType, VidUsLogicalCoordinate> _logicalCoordinates;

  late Map<VidUsVisualAreaType, VidUsPhysicalCoordinate> _physicalCoordinates;

  /// Get all LogicalCoordinates of this visual.
  Map<VidUsVisualAreaType, VidUsLogicalCoordinate> get logicalCoordinates =>
      _logicalCoordinates;

  ///Get all PhysicalCoordinates of this visual.
  Map<VidUsVisualAreaType, VidUsPhysicalCoordinate> get physicalCoordinates =>
      _physicalCoordinates;

  VidUs2DVisual() {
    setVisualType(VidUsVisualType.V2D);
    _logicalCoordinates =
        new Map<VidUsVisualAreaType, VidUsLogicalCoordinate>();
    _physicalCoordinates =
        new Map<VidUsVisualAreaType, VidUsPhysicalCoordinate>();
  }

  ///Convert VidUs2DVisual to binary data.
  @override
  Uint8List toBytes() {
    var writer = new VidUsDataWriter();
    var baseData = super.toBytes();
    writer.writeBytes(baseData);
    writer.writeByte(_physicalCoordinates.length);
    _physicalCoordinates.forEach((key, value) {
      writer.writeByte(key.index);
      writer.writeBytes(value.toBytes());
    });
    writer.writeByte(_logicalCoordinates.length);
    _logicalCoordinates.forEach((key, value) {
      writer.writeByte(key.index);
      writer.writeBytes(value.toBytes());
    });
    return writer.data;
  }

  ///Convert binary data to VidUs2DVisual.
  static VidUsVisual fromBytes(Uint8List bytes) {
    var reader = new VidUsDataReader(bytes);
    var visualType = VidUsVisualType.values[reader.readByte()];
    var displayMode = VidUsDisplayMode.values[reader.readByte()];
    if (visualType == VidUsVisualType.V2D) {
      var indicator = VidUsVisualIndicator.values[reader.readByte()];
      var activeModeType = VidUsModeType.values[reader.readByte()];
      var modeCount = reader.readByte();
      List<VidUsMode> modes = [];
      for (var i = 0; i < modeCount; i++) {
        var mode = VidUsMode.fromBytes(reader.readBytes());
        modes.add(mode);
      }
      var visual = new VidUs2DVisual();
      visual.setIndicator(indicator);
      modes.forEach((mode) {
        visual.modes.add(mode);
      });
      visual..setActiveModeType(activeModeType);
      var physicalCoordinateCount = reader.readByte();
      for (var i = 0; i < physicalCoordinateCount; i++) {
        var visualAreaType = VidUsVisualAreaType.values[reader.readByte()];
        var physicalCoordinate =
            VidUsPhysicalCoordinate.fromBytes(reader.readBytes());
        visual._physicalCoordinates[visualAreaType] = physicalCoordinate;
      }
      var logicalCoordinateCount = reader.readByte();
      for (var i = 0; i < logicalCoordinateCount; i++) {
        var visualAreaType = VidUsVisualAreaType.values[reader.readByte()];
        var logicalCoordinate =
            VidUsLogicalCoordinate.fromBytes(reader.readBytes());
        visual._logicalCoordinates[visualAreaType] = logicalCoordinate;
      }
      visual.setDisplayMode(displayMode);
      return visual;
    }
    throw new Exception(
        "Can not restore visual data from $visualType to VidUs2DVisual.");
  }
}