Widow – Rev 9

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using System;
using System.Threading;
using System.Threading.Tasks;
using Widow.Properties;

namespace Widow
{
    public class WindowManipulation : IDisposable
    {
        #region Public Enums, Properties and Fields

        public bool OnWindowCreate { get; set; }

        public int ApplyEveryTime { get; set; }

        public bool ApplyEveryTimeEnabled { get; set; }

        #endregion

        #region Private Delegates, Events, Enums, Properties, Indexers and Fields

        private MainForm Form { get; }

        private Windows.Windows Windows { get; }

        private CancellationTokenSource CancellationTokenSource { get; set; }

        private Task ApplyEveryTask { get; }

        #endregion

        #region Constructors, Destructors and Finalizers

        public WindowManipulation()
        {
            CancellationTokenSource = new CancellationTokenSource();
            ApplyEveryTask = ApplyEvery(CancellationTokenSource.Token);
        }

        public WindowManipulation(MainForm mainForm) : this()
        {
            Form = mainForm;

            Form.WindowCreated += Form_WindowCreated;
        }

        public WindowManipulation(MainForm mainForm, Windows.Windows windows) : this(mainForm)
        {
            Windows = windows;
        }

        public WindowManipulation(MainForm mainForm, Windows.Windows windows, Settings settings) : this(mainForm,
            windows)
        {
            OnWindowCreate = settings.OnWindowCreate;
            ApplyEveryTimeEnabled = settings.ApplyEveryTimeEnabled;
            if (int.TryParse(settings.ApplyEveryTime, out var time))
            {
                ApplyEveryTime = time;
            }
        }

        public void Dispose()
        {
            Form.WindowCreated -= Form_WindowCreated;
            CancellationTokenSource.Cancel();
            ApplyEveryTask.Wait();
            CancellationTokenSource.Dispose();
            CancellationTokenSource = null;
        }

        #endregion

        #region Event Handlers

        private void Form_WindowCreated(object sender, WindowCreatedEventArgs e)
        {
            if (!OnWindowCreate)
            {
                return;
            }

            if (!Windows.Contains(e.Name))
            {
                return;
            }

            Apply();
        }

        #endregion

        #region Public Methods

        public void Apply()
        {
            foreach (var window in Windows.Window)
            {
                var hWnd = Helpers.FindWindowByTitle(window.Name);
                if (hWnd == IntPtr.Zero)
                {
                    continue;
                }

                if (!Natives.GetWindowRect(hWnd, out var rect))
                {
                    continue;
                }

                var left = window.Left;
                if (window.IgnoreLeft)
                {
                    left = rect.Left;
                }

                var top = window.Top;
                if (window.IgnoreTop)
                {
                    top = rect.Top;
                }

                var width = window.Width;
                if (window.IgnoreWidth)
                {
                    width = rect.Left - rect.Right;
                }

                var height = window.Height;
                if (window.IgnoreHeight)
                {
                    height = rect.Top - rect.Bottom;
                }

                Natives.MoveWindow(hWnd, left, top, width, height, true);
            }
        }

        #endregion

        #region Private Methods

        private async Task ApplyEvery(CancellationToken cancellationToken)
        {
            do
            {
                if (!ApplyEveryTimeEnabled)
                {
                    await Task.Delay(1000, cancellationToken);
                    continue;
                }

                await Task.Delay(ApplyEveryTime, cancellationToken);

                Apply();
            } while (!cancellationToken.IsCancellationRequested);
        }

        #endregion
    }
}

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