packages/flutter_driver/lib/src/common/gesture.dart

// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'find.dart';

/// A Flutter Driver command that taps on a target widget located by [finder].
class Tap extends CommandWithTarget {
  /// Creates a tap command to tap on a widget located by [finder].
  Tap(super.finder, { super.timeout });

  /// Deserializes this command from the value generated by [serialize].
  Tap.deserialize(super.json, super.finderFactory) : super.deserialize();

  @override
  String get kind => 'tap';
}

/// A Flutter Driver command that commands the driver to perform a scrolling action.
class Scroll extends CommandWithTarget {
  /// Creates a scroll command that will attempt to scroll a scrollable view by
  /// dragging a widget located by the given [finder].
  Scroll(
    super.finder,
    this.dx,
    this.dy,
    this.duration,
    this.frequency, {
    super.timeout,
  });

  /// Deserializes this command from the value generated by [serialize].
  Scroll.deserialize(super.json, super.finderFactory)
    : dx = double.parse(json['dx']!),
      dy = double.parse(json['dy']!),
      duration = Duration(microseconds: int.parse(json['duration']!)),
      frequency = int.parse(json['frequency']!),
      super.deserialize();

  /// Delta X offset per move event.
  final double dx;

  /// Delta Y offset per move event.
  final double dy;

  /// The duration of the scrolling action.
  final Duration duration;

  /// The frequency in Hz of the generated move events.
  final int frequency;

  @override
  String get kind => 'scroll';

  @override
  Map<String, String> serialize() => super.serialize()..addAll(<String, String>{
    'dx': '$dx',
    'dy': '$dy',
    'duration': '${duration.inMicroseconds}',
    'frequency': '$frequency',
  });
}

/// A Flutter Driver command that commands the driver to ensure that the element
/// represented by [finder] has been scrolled completely into view.
class ScrollIntoView extends CommandWithTarget {
  /// Creates this command given a [finder] used to locate the widget to be
  /// scrolled into view.
  ScrollIntoView(super.finder, { this.alignment = 0.0, super.timeout });

  /// Deserializes this command from the value generated by [serialize].
  ScrollIntoView.deserialize(super.json, super.finderFactory)
    : alignment = double.parse(json['alignment']!),
      super.deserialize();

  /// How the widget should be aligned.
  ///
  /// This value is passed to [Scrollable.ensureVisible] as the value of its
  /// argument of the same name.
  ///
  /// Defaults to 0.0.
  final double alignment;

  @override
  String get kind => 'scrollIntoView';

  @override
  Map<String, String> serialize() => super.serialize()..addAll(<String, String>{
    'alignment': '$alignment',
  });
}