Add a copy/paste buttons to search space option

Src/FinderOuter/ViewModels/MissingBase58ViewModel.cs

@@ -31,8 +31,10 @@ public MissingBase58ViewModel(Settings settings)
             searchSpace = new();
 
             IObservable<bool> isFindEnabled = this.WhenAnyValue(
-                x => x.Input, x => x.SelectedMissingChar,
-                x => x.Result.CurrentState, (b58, c, state) =>
+                x => x.Input,
+                x => x.SelectedMissingChar,
+                x => x.Result.CurrentState,
+                (b58, c, state) =>
                             !string.IsNullOrEmpty(b58) &&
                             InputService.IsMissingCharValid(c) &&
                             state != State.Working);
@@ -56,6 +58,8 @@ public MissingBase58ViewModel(Settings settings)
             AddNumberCommand = ReactiveCommand.Create(AddNumber, canAdd);
             AddExactCommand = ReactiveCommand.Create(AddExact, canAdd);
             AddSimilarCommand = ReactiveCommand.Create(AddSimilar, canAdd);
+
+            CopyCommand = ReactiveCommand.Create(Copy, isFindEnabled);
         }
 
 
@@ -93,6 +97,7 @@ public Base58Type SelectedInputType
 
         private void Start()
         {
+            CopiedList = Array.Empty<string>();
             isChanged = false;
             Index = 0;
             Max = 0;

Src/FinderOuter/ViewModels/OptionVmBase.cs

@@ -12,6 +12,7 @@
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
 using System.Diagnostics;
+using System.Linq;
 
 namespace FinderOuter.ViewModels
 {
@@ -41,6 +42,9 @@ public OptionVmBase(IReport report, IWindowManager winMan) : base(winMan)
             PreviousCommand = ReactiveCommand.Create(Previous, isPrevEnabled);
             RemoveSelectedCommand = ReactiveCommand.Create(RemoveSelected, canRemove);
             ClearAllCommand = ReactiveCommand.Create(ClearAll, canAdd);
+
+            IObservable<bool> canPaste = this.WhenAnyValue(x => x.CopiedList, (item) => item != null && item.Length > 0);
+            PasteCommand = ReactiveCommand.Create<bool>(Paste, canPaste);
         }
 
 
@@ -97,6 +101,44 @@ public DescriptiveItem<CompareInputType> SelectedCompareInputType
         public FontFamily CjkFont => FontFamily.Parse("Microsoft YaHei,Simsun,苹方-简,宋体-简");
 
 
+        public IReactiveCommand CopyCommand { get; protected set; }
+        public IReactiveCommand PasteCommand { get; protected set; }
+
+        private string[] _copied = Array.Empty<string>();
+        public string[] CopiedList
+        {
+            get => _copied;
+            set => this.RaiseAndSetIfChanged(ref _copied, value);
+        }
+
+        public void Copy()
+        {
+            if (CurrentItems is not null)
+            {
+                CopiedList = CurrentItems.ToArray();
+            }
+        }
+
+        public void Paste(bool replace)
+        {
+            if (CurrentItems is not null)
+            {
+                if (replace)
+                {
+                    CurrentItems.Clear();
+                }
+
+                foreach (var item in CopiedList)
+                {
+                    if (!CurrentItems.Contains(item))
+                    {
+                        CurrentItems.Add(item);
+                    }
+                }
+            }
+        }
+
+
         protected ObservableCollection<string>[] allItems = [];
 
         private ObservableCollection<string> _items;

Src/FinderOuter/Views/MissingBase58View.axaml

@@ -7,7 +7,7 @@
              x:CompileBindings="True"
              x:DataType="vm:MissingBase58ViewModel"
              x:Class="FinderOuter.Views.MissingBase58View">
-  
+
   <Design.DataContext>
     <vm:MissingBase58ViewModel/>
   </Design.DataContext>
@@ -84,14 +84,31 @@
           <Button Content="Similar letters" Command="{Binding AddSimilarCommand}"
                   Margin="2" Width="100"
                   Grid.Column="0" Grid.Row="1"/>
-
         </Grid>
 
-        <ListBox ItemsSource="{Binding CurrentItems}"
-                 SelectedItem="{Binding SelectedItem}"
-                 Height="130"
-                 Margin="3"
-                 Grid.Column="1" Grid.Row="1"/>
+        <Grid Grid.Column="1" Grid.Row="1" RowDefinitions="*,auto">
+          <ListBox ItemsSource="{Binding CurrentItems}"
+                   SelectedItem="{Binding SelectedItem}"
+                   Height="130"
+                   Margin="3"
+                   Grid.Row="0"/>
+          <Grid ColumnDefinitions="auto,*,*" Grid.Row="1">
+            <Button Content="Copy"
+                    Command="{Binding CopyCommand}"
+                    Width="65"
+                    Grid.Column="0"/>
+            <Button Content="Paste (add)"
+                    Command="{Binding PasteCommand}"
+                    CommandParameter="{x:False}"
+                    Width="100"
+                    Grid.Column="1"/>
+            <Button Content="Paste (replace)"
+                    Command="{Binding PasteCommand}"
+                    CommandParameter="{x:True}"
+                    Width="100"
+                    Grid.Column="2"/>
+          </Grid>
+        </Grid>
 
         <Grid ColumnDefinitions="auto,auto" RowDefinitions="auto,auto,auto,auto" Grid.Column="2" Grid.Row="1">
           <Button Content="Add all letters" Command="{Binding AddAllCommand}"