109 lines
3.5 KiB
C#
109 lines
3.5 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using System.Windows.Media;
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using System.Windows;
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using System.Windows.Controls;
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using System.IO;
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using System.Diagnostics;
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namespace WGneu.Helpers {
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public static class Utils {
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public static void SetInputChanged(Control input) {
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input.BorderBrush = Brushes.Orange;
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}
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public static void SetInputInvalid(Control input) {
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input.BorderBrush = Brushes.Red;
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}
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public static void ClearInputState(Control input) {
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input.ClearValue(Control.BorderBrushProperty);
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}
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public static IEnumerable<T> FindVisualChilds<T>(DependencyObject depObj) where T : DependencyObject {
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if (depObj == null)
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yield return (T)Enumerable.Empty<T>();
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for (int i = 0; i < VisualTreeHelper.GetChildrenCount(depObj); i++) {
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DependencyObject ithChild = VisualTreeHelper.GetChild(depObj, i);
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if (ithChild == null)
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continue;
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if (ithChild is T t)
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yield return t;
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foreach (T childOfChild in FindVisualChilds<T>(ithChild))
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yield return childOfChild;
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}
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}
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public static IEnumerable<T> FindVisualChilds<T>(DependencyObject depObj, IEnumerable<DependencyObject> exempt) where T : DependencyObject {
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return FindVisualChilds<T>(depObj).Where(c => !exempt.Contains(c));
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}
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public static int Modulo(string a, int b) {
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if (!a.All(char.IsDigit))
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throw new ArgumentException("First argument has to be a decimal string");
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return a.Select(ch => ch - '0').Aggregate((sum, n) => (sum * 10 + n) % b);
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}
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public static void RunBackground(string title, Func<Task> a) {
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Task.Run(async () => {
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try {
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await a();
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} catch (Exception e) {
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MessageBox.Show(e.ToString(), title, MessageBoxButton.OK, MessageBoxImage.Error);
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}
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});
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}
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public static void MailTo(string emailAddress) {
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Process.Start(new ProcessStartInfo() {
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FileName = $"mailto:{emailAddress}",
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UseShellExecute = true,
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});
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}
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public sealed class TemporaryFile : IDisposable {
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private int Usages = 0;
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public string FilePath { get; private set; }
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public TemporaryFile() : this(null) { }
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public TemporaryFile(string? ext) : this(Path.Combine(Path.GetTempPath(), "Kelwin"), ext) { }
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public TemporaryFile(string dir, string? ext) {
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FilePath = Path.Combine(dir, Path.GetRandomFileName().Replace(".", "") + (ext != null ? $".{ext}" : ""));
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Usages++;
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Create();
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}
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~TemporaryFile() {
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Delete();
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}
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public void Dispose() {
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if (--Usages == 0) {
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Delete();
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GC.SuppressFinalize(this);
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}
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}
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public TemporaryFile NewReference() {
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Usages++;
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return this;
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}
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private void Create() {
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using (File.Create(FilePath)) { };
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}
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private void Delete() {
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if (FilePath == null) return;
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File.Delete(FilePath);
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FilePath = null;
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}
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}
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}
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}
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