refactor: date time format

- generate example dynamically
- update commit/author time in histories immediately after data time format changed

Author: love-linger

src/Models/DateTimeFormat.cs

@@ -1,16 +1,20 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
 
 namespace SourceGit.Models
 {
     public class DateTimeFormat
     {
-        public string DisplayText { get; set; }
         public string DateOnly { get; set; }
         public string DateTime { get; set; }
 
-        public DateTimeFormat(string displayText, string dateOnly, string dateTime)
+        public string Example
+        {
+            get => _example.ToString(DateTime);
+        }
+
+        public DateTimeFormat(string dateOnly, string dateTime)
         {
-            DisplayText = displayText;
             DateOnly = dateOnly;
             DateTime = dateTime;
         }
@@ -28,18 +32,19 @@ public static DateTimeFormat Actived
 
         public static readonly List<DateTimeFormat> Supported = new List<DateTimeFormat>
         {
-            new DateTimeFormat("2025/01/31 08:00:00", "yyyy/MM/dd", "yyyy/MM/dd HH:mm:ss"),
-            new DateTimeFormat("2025.01.31 08:00:00", "yyyy.MM.dd", "yyyy.MM.dd HH:mm:ss"),
-            new DateTimeFormat("2025-01-31 08:00:00", "yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss"),
-            new DateTimeFormat("01/31/2025 08:00:00", "MM/dd/yyyy", "MM/dd/yyyy HH:mm:ss"),
-            new DateTimeFormat("01.31.2025 08:00:00", "MM.dd.yyyy", "MM.dd.yyyy HH:mm:ss"),
-            new DateTimeFormat("01-31-2025 08:00:00", "MM-dd-yyyy", "MM-dd-yyyy HH:mm:ss"),
-            new DateTimeFormat("31/01/2025 08:00:00", "dd/MM/yyyy", "dd/MM/yyyy HH:mm:ss"),
-            new DateTimeFormat("31.01.2025 08:00:00", "dd.MM.yyyy", "dd.MM.yyyy HH:mm:ss"),
-            new DateTimeFormat("31-01-2025 08:00:00", "dd-MM-yyyy", "dd-MM-yyyy HH:mm:ss"),
-
-            new DateTimeFormat("Jan 31 2025 08:00:00", "MMM d yyyy", "MMM d yyyy HH:mm:ss"),
-            new DateTimeFormat("31 Jan 2025 08:00:00", "d MMM yyyy", "d MMM yyyy HH:mm:ss"),
+            new DateTimeFormat("yyyy/MM/dd", "yyyy/MM/dd HH:mm:ss"),
+            new DateTimeFormat("yyyy.MM.dd", "yyyy.MM.dd HH:mm:ss"),
+            new DateTimeFormat("yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss"),
+            new DateTimeFormat("MM/dd/yyyy", "MM/dd/yyyy HH:mm:ss"),
+            new DateTimeFormat("MM.dd.yyyy", "MM.dd.yyyy HH:mm:ss"),
+            new DateTimeFormat("MM-dd-yyyy", "MM-dd-yyyy HH:mm:ss"),
+            new DateTimeFormat("dd/MM/yyyy", "dd/MM/yyyy HH:mm:ss"),
+            new DateTimeFormat("dd.MM.yyyy", "dd.MM.yyyy HH:mm:ss"),
+            new DateTimeFormat("dd-MM-yyyy", "dd-MM-yyyy HH:mm:ss"),
+            new DateTimeFormat("MMM d yyyy", "MMM d yyyy HH:mm:ss"),
+            new DateTimeFormat("d MMM yyyy", "d MMM yyyy HH:mm:ss"),
         };
+
+        private static readonly DateTime _example = new DateTime(2025, 1, 31, 8, 0, 0, DateTimeKind.Local);
     }
 }

src/Views/Histories.axaml

@@ -191,7 +191,8 @@
                                            FontWeight="{Binding FontWeight}"
                                            Opacity="{Binding Opacity}"
                                            UseAuthorTime="{Binding Source={x:Static vm:Preference.Instance}, Path=ShowAuthorTimeInGraph, Mode=OneWay}"
-                                           ShowAsDateTime="{Binding Source={x:Static vm:Preference.Instance}, Path=!DisplayTimeAsPeriodInHistories}"/>
+                                           ShowAsDateTime="{Binding Source={x:Static vm:Preference.Instance}, Path=!DisplayTimeAsPeriodInHistories}"
+                                           DateTimeFormat="{Binding Source={x:Static vm:Preference.Instance}, Path=DateTimeFormat}"/>
                   </Border>
                 </Grid>
               </DataTemplate>

src/Views/Histories.axaml.cs

@@ -343,6 +343,15 @@ public bool ShowAsDateTime
             set => SetValue(ShowAsDateTimeProperty, value);
         }
 
+        public static readonly StyledProperty<int> DateTimeFormatProperty =
+            AvaloniaProperty.Register<CommitTimeTextBlock, int>(nameof(DateTimeFormat), 0);
+
+        public int DateTimeFormat
+        {
+            get => GetValue(DateTimeFormatProperty);
+            set => SetValue(DateTimeFormatProperty, value);
+        }
+
         public static readonly StyledProperty<bool> UseAuthorTimeProperty =
             AvaloniaProperty.Register<CommitTimeTextBlock, bool>(nameof(UseAuthorTime), true);
 
@@ -371,6 +380,11 @@ protected override void OnPropertyChanged(AvaloniaPropertyChangedEventArgs chang
                 else
                     StartTimer();
             }
+            else if (change.Property == DateTimeFormatProperty)
+            {
+                if (ShowAsDateTime)
+                    SetCurrentValue(TextProperty, GetDisplayText());
+            }
         }
 
         protected override void OnLoaded(RoutedEventArgs e)
@@ -426,10 +440,10 @@ private string GetDisplayText()
             if (commit == null)
                 return string.Empty;
 
-            var timestamp = UseAuthorTime ? commit.AuthorTime : commit.CommitterTime;
             if (ShowAsDateTime)
-                return DateTime.UnixEpoch.AddSeconds(timestamp).ToLocalTime().ToString(Models.DateTimeFormat.Actived.DateTime);
+                return UseAuthorTime ? commit.AuthorTimeStr : commit.CommitterTimeStr;
 
+            var timestamp = UseAuthorTime ? commit.AuthorTime : commit.CommitterTime;
             var now = DateTime.Now;
             var localTime = DateTime.UnixEpoch.AddSeconds(timestamp).ToLocalTime();
             var span = now - localTime;

src/Views/Preference.axaml

@@ -72,7 +72,7 @@
               <ComboBox.ItemTemplate>
                 <DataTemplate x:DataType="{x:Type m:DateTimeFormat}">
                   <Grid ColumnDefinitions="*,8,*">
-                    <TextBlock Grid.Column="0" FontFamily="{DynamicResource Fonts.Monospace}" Text="{Binding DisplayText}"/>
+                    <TextBlock Grid.Column="0" FontFamily="{DynamicResource Fonts.Monospace}" Text="{Binding Example}"/>
                     <TextBlock Grid.Column="2" FontFamily="{DynamicResource Fonts.Monospace}" Text="{Binding DateTime}" Foreground="{DynamicResource Brush.FG2}"/>
                   </Grid>
                 </DataTemplate>