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using System.Collections.Generic;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Input;
namespace StardewModdingAPI.Framework.Input
{
/// <summary>An abstraction for manipulating controller state.</summary>
internal class GamePadStateBuilder
{
/*********
** Fields
*********/
/// <summary>The current button states.</summary>
private readonly IDictionary<SButton, ButtonState> ButtonStates;
/// <summary>The left trigger value.</summary>
private float LeftTrigger;
/// <summary>The right trigger value.</summary>
private float RightTrigger;
/// <summary>The left thumbstick position.</summary>
private Vector2 LeftStickPos;
/// <summary>The left thumbstick position.</summary>
private Vector2 RightStickPos;
/*********
** Public methods
*********/
/// <summary>Construct an instance.</summary>
/// <param name="state">The initial controller state.</param>
public GamePadStateBuilder(GamePadState state)
{
this.ButtonStates = new Dictionary<SButton, ButtonState>
{
[SButton.DPadUp] = state.DPad.Up,
[SButton.DPadDown] = state.DPad.Down,
[SButton.DPadLeft] = state.DPad.Left,
[SButton.DPadRight] = state.DPad.Right,
[SButton.ControllerA] = state.Buttons.A,
[SButton.ControllerB] = state.Buttons.B,
[SButton.ControllerX] = state.Buttons.X,
[SButton.ControllerY] = state.Buttons.Y,
[SButton.LeftStick] = state.Buttons.LeftStick,
[SButton.RightStick] = state.Buttons.RightStick,
[SButton.LeftShoulder] = state.Buttons.LeftShoulder,
[SButton.RightShoulder] = state.Buttons.RightShoulder,
[SButton.ControllerBack] = state.Buttons.Back,
[SButton.ControllerStart] = state.Buttons.Start,
[SButton.BigButton] = state.Buttons.BigButton
};
this.LeftTrigger = state.Triggers.Left;
this.RightTrigger = state.Triggers.Right;
this.LeftStickPos = state.ThumbSticks.Left;
this.RightStickPos = state.ThumbSticks.Right;
}
/// <summary>Mark all matching buttons unpressed.</summary>
/// <param name="buttons">The buttons.</param>
public void SuppressButtons(IEnumerable<SButton> buttons)
{
foreach (SButton button in buttons)
this.SuppressButton(button);
}
/// <summary>Mark a button unpressed.</summary>
/// <param name="button">The button.</param>
public void SuppressButton(SButton button)
{
switch (button)
{
// left thumbstick
case SButton.LeftThumbstickUp:
if (this.LeftStickPos.Y > 0)
this.LeftStickPos.Y = 0;
break;
case SButton.LeftThumbstickDown:
if (this.LeftStickPos.Y < 0)
this.LeftStickPos.Y = 0;
break;
case SButton.LeftThumbstickLeft:
if (this.LeftStickPos.X < 0)
this.LeftStickPos.X = 0;
break;
case SButton.LeftThumbstickRight:
if (this.LeftStickPos.X > 0)
this.LeftStickPos.X = 0;
break;
// right thumbstick
case SButton.RightThumbstickUp:
if (this.RightStickPos.Y > 0)
this.RightStickPos.Y = 0;
break;
case SButton.RightThumbstickDown:
if (this.RightStickPos.Y < 0)
this.RightStickPos.Y = 0;
break;
case SButton.RightThumbstickLeft:
if (this.RightStickPos.X < 0)
this.RightStickPos.X = 0;
break;
case SButton.RightThumbstickRight:
if (this.RightStickPos.X > 0)
this.RightStickPos.X = 0;
break;
// triggers
case SButton.LeftTrigger:
this.LeftTrigger = 0;
break;
case SButton.RightTrigger:
this.RightTrigger = 0;
break;
// buttons
default:
if (this.ButtonStates.ContainsKey(button))
this.ButtonStates[button] = ButtonState.Released;
break;
}
}
/// <summary>Construct an equivalent gamepad state.</summary>
public GamePadState ToGamePadState()
{
return new GamePadState(
leftThumbStick: this.LeftStickPos,
rightThumbStick: this.RightStickPos,
leftTrigger: this.LeftTrigger,
rightTrigger: this.RightTrigger,
buttons: this.GetBitmask(this.GetPressedButtons()) // MonoDevelop requires one bitmask here; don't specify multiple values
);
}
/*********
** Private methods
*********/
/// <summary>Get all pressed buttons.</summary>
private IEnumerable<Buttons> GetPressedButtons()
{
foreach (var pair in this.ButtonStates)
{
if (pair.Value == ButtonState.Pressed && pair.Key.TryGetController(out Buttons button))
yield return button;
}
}
/// <summary>Get a bitmask representing the given buttons.</summary>
/// <param name="buttons">The buttons to represent.</param>
private Buttons GetBitmask(IEnumerable<Buttons> buttons)
{
Buttons flag = 0;
foreach (Buttons button in buttons)
flag |= button;
return flag;
}
}
}
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