MainWindow.xaml.cs

using System.Diagnostics;
using System.Reflection;

namespace OneColumnEncoder;

/// <summary>
/// Main app window:
/// - builds title from git metadata,
/// - throttles NUMA/CPU refresh on mouse/key input,
/// - coordinates child-window closing,
/// - coordinates ViewModel disposal during shutdown.
/// </summary>
public partial class MainWindow : AdaptiveWindow
{
    private DateTime _lastNumaCpuTrigger = DateTime.MinValue;
    private static readonly TimeSpan NumaCpuTriggerInterval = TimeSpan.FromMilliseconds(500);

    public MainWindow()
    {
        InitializeComponent();
        Title = $"{Models.Lang.UILangProvider.MainWindowTitle} · PID {Process.GetCurrentProcess().Id} · Commit {GetGitCommitCount()} {GetGitCommitShortHash()}";
        Closing += OnClosing;
        Closed += OnClosed;
        PreviewMouseDown += OnPreviewMouseDown;
        PreviewKeyDown += OnPreviewKeyDown;
    }

    // 2 Pieces of Get info needed
    private static string GetGitCommitCount()
    {
        return Assembly.GetExecutingAssembly()
            .GetCustomAttributes<AssemblyMetadataAttribute>()
            .FirstOrDefault(attribute => attribute.Key == "GitCommitCount")
            ?.Value ?? "0";
    }
    private static string GetGitCommitShortHash()
    {
        return Assembly.GetExecutingAssembly()
            .GetCustomAttributes<AssemblyMetadataAttribute>()
            .FirstOrDefault(attribute => attribute.Key == "GitCommitShortHash")
            ?.Value ?? "unknown";
    }

    private void OnPreviewMouseDown(object sender, MouseButtonEventArgs e)
    {
        if (e.ChangedButton == MouseButton.Left)
            TriggerNumaCpuCheck();
    }

    private void OnPreviewKeyDown(object sender, KeyEventArgs e) => TriggerNumaCpuCheck();

    private void TriggerNumaCpuCheck()
    {
        if (DateTime.UtcNow - _lastNumaCpuTrigger < NumaCpuTriggerInterval)
            return;
        _lastNumaCpuTrigger = DateTime.UtcNow;

        if (DataContext is ViewModels.MainVM vm)
            vm.RefreshNumaCpuCheck();
    }

    private void OnClosing(object? sender, CancelEventArgs e)
    {
        // Close all child windows before the main window closes
        foreach (Window? window in Application.Current.Windows.OfType<Window>().Except([this]).ToArray())
            window.Close();

        if (Application.Current.Windows.OfType<Window>().Any(window => window != this))
        {
            e.Cancel = true;
            return;
        }

        // Clear modal nav state
        if (Application.Current is App app) app._modalNavM.CloseAll();
    }

    private void OnClosed(object? sender, EventArgs e)
    {
        if (DataContext is IDisposable disposable) disposable.Dispose();

        DataContext = null;
        Closing -= OnClosing;
        Closed -= OnClosed;
        PreviewMouseDown -= OnPreviewMouseDown;
        PreviewKeyDown -= OnPreviewKeyDown;
    }
}