refactor<*>: rewrite all with AvaloniaUI

src/ViewModels/Apply.cs

@@ -0,0 +1,65 @@
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.IO;
+using System.Threading.Tasks;
+
+namespace SourceGit.ViewModels {
+    public class Apply : Popup {
+        [Required(ErrorMessage = "Patch file is required!!!")]
+        [CustomValidation(typeof(Apply), nameof(ValidatePatchFile))]
+        public string PatchFile {
+            get => _patchFile;
+            set => SetProperty(ref _patchFile, value, true);
+        }
+
+        public bool IgnoreWhiteSpace {
+            get => _ignoreWhiteSpace;
+            set => SetProperty(ref _ignoreWhiteSpace, value);
+        }
+
+        public List<Models.ApplyWhiteSpaceMode> WhiteSpaceModes {
+            get;
+            private set;
+        }
+
+        public Models.ApplyWhiteSpaceMode SelectedWhiteSpaceMode {
+            get;
+            set;
+        }
+
+        public Apply(Repository repo) {
+            _repo = repo;
+
+            WhiteSpaceModes = new List<Models.ApplyWhiteSpaceMode> {
+                new Models.ApplyWhiteSpaceMode("Apply.NoWarn", "Apply.NoWarn.Desc", "nowarn"),
+                new Models.ApplyWhiteSpaceMode("Apply.Warn", "Apply.Warn.Desc", "warn"),
+                new Models.ApplyWhiteSpaceMode("Apply.Error", "Apply.Error.Desc", "error"),
+                new Models.ApplyWhiteSpaceMode("Apply.ErrorAll", "Apply.ErrorAll.Desc", "error-all")
+            };
+            SelectedWhiteSpaceMode = WhiteSpaceModes[0];
+
+            View = new Views.Apply() { DataContext = this };
+        }
+
+        public static ValidationResult ValidatePatchFile(string file, ValidationContext _) {
+            if (File.Exists(file)) {
+                return ValidationResult.Success;
+            }
+
+            return new ValidationResult($"File '{file}' can NOT be found!!!");
+        }
+
+        public override Task<bool> Sure() {
+            _repo.SetWatcherEnabled(false);
+            return Task.Run(() => {
+                var succ = new Commands.Apply(_repo.FullPath, _patchFile, _ignoreWhiteSpace, SelectedWhiteSpaceMode.Arg).Exec();
+                CallUIThread(() => _repo.SetWatcherEnabled(true));
+                return succ;
+            });
+        }
+
+        private Repository _repo = null;
+        private string _patchFile = string.Empty;
+        private bool _ignoreWhiteSpace = true;
+    }
+}