enhance: check new branch name in Push to a NEW branch dialog

Signed-off-by: leo <longshuang@msn.cn>

Author: love-linger

src/ViewModels/PushToNewBranch.cs

@@ -0,0 +1,44 @@
+using System.ComponentModel.DataAnnotations;
+using System.Diagnostics.CodeAnalysis;
+using CommunityToolkit.Mvvm.ComponentModel;
+
+namespace SourceGit.ViewModels
+{
+    public class PushToNewBranch : ObservableValidator
+    {
+        public string Remote
+        {
+            get;
+        }
+
+        [Required(ErrorMessage = "Branch name is required!")]
+        [CustomValidation(typeof(PushToNewBranch), nameof(ValidateBranchName))]
+        public string BranchName
+        {
+            get => _branchName;
+            set => SetProperty(ref _branchName, value, true);
+        }
+
+        public PushToNewBranch(string remote)
+        {
+            Remote = remote;
+        }
+
+        public static ValidationResult ValidateBranchName(string name, ValidationContext ctx)
+        {
+            if (!Models.RefName.IsValidBranchName(name))
+                return new ValidationResult("Bad branch name format!");
+
+            return ValidationResult.Success;
+        }
+
+        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL2026:RequiresUnreferencedCode")]
+        public bool Check()
+        {
+            ValidateAllProperties();
+            return !HasErrors;
+        }
+
+        private string _branchName = string.Empty;
+    }
+}

src/Views/Push.axaml.cs

@@ -20,8 +20,10 @@ private async void OnPushToNewBranch(object sender, RoutedEventArgs e)
             if (launcher == null)
                 return;
 
-            var dialog = new PushToNewBranch();
-            dialog.SetRemote(push.SelectedRemote.Name);
+            var dialog = new PushToNewBranch()
+            {
+                DataContext = new ViewModels.PushToNewBranch(push.SelectedRemote.Name)
+            };
 
             var name = await dialog.ShowDialog<string>(launcher);
             if (!string.IsNullOrEmpty(name))

src/Views/PushToNewBranch.axaml

@@ -3,12 +3,14 @@
                     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
                     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
                     xmlns:v="using:SourceGit.Views"
+                    xmlns:vm="using:SourceGit.ViewModels"
                     mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
                     x:Class="SourceGit.Views.PushToNewBranch"
                     x:Name="ThisControl"
+                    x:DataType="vm:PushToNewBranch"
                     Icon="/App.ico"
                     Title="{DynamicResource Text.PushToNewBranch}"
-                    SizeToContent="WidthAndHeight"
+                    Width="400" SizeToContent="Height"
                     CanResize="False"
                     WindowStartupLocation="CenterOwner">
   <Grid RowDefinitions="Auto,*">
@@ -40,13 +42,14 @@
       </Border>
 
       <v:BranchOrTagNameTextBox x:Name="TxtName"
-                                MinWidth="300" Height="32"
+                                Height="32"
+                                Text="{Binding BranchName, Mode=TwoWay}"
                                 Margin="16,8,16,0"
                                 CornerRadius="3"
                                 Focusable="True">
         <TextBox.InnerLeftContent>
           <Border Height="22" CornerRadius="10" Margin="4,0,0,0" Background="Green">
-            <TextBlock x:Name="TxtPrefix" Text="REMOTE" Foreground="White" Margin="8,0"/>
+            <TextBlock x:Name="TxtPrefix" Text="{Binding Remote, Mode=OneWay}" Foreground="White" Margin="8,0"/>
           </Border>
         </TextBox.InnerLeftContent>
       </v:BranchOrTagNameTextBox>
@@ -63,7 +66,6 @@
                 Content="{DynamicResource Text.Cancel}"
                 Click="OnCancel"/>
       </StackPanel>
-    
-  </StackPanel>
+    </StackPanel>
   </Grid>
 </v:ChromelessWindow>

src/Views/PushToNewBranch.axaml.cs

@@ -17,14 +17,10 @@ protected override void OnLoaded(RoutedEventArgs e)
             TxtName.Focus(NavigationMethod.Directional);
         }
 
-        public void SetRemote(string remote)
-        {
-            TxtPrefix.Text = remote;
-        }
-
         private void OnSure(object _1, RoutedEventArgs _2)
         {
-            Close(TxtName.Text);
+            if (DataContext is ViewModels.PushToNewBranch { HasErrors: false } vm && vm.Check())
+                Close(vm.BranchName);
         }
 
         private void OnCancel(object _1, RoutedEventArgs _2)