feat: class input control.

2024-01-31 00:54:13 +08:00
parent 9ea537f7eb
commit 1dc37c0b86
10 changed files with 202 additions and 1 deletions
--- a/src/Ursa/Controls/ControlClassesInput/ControlClassesInput.cs
+++ b/src/Ursa/Controls/ControlClassesInput/ControlClassesInput.cs
@@ -0,0 +1,147 @@
+using System.Collections.ObjectModel;
+using System.Collections.Specialized;
+using Avalonia;
+using Avalonia.Collections;
+using Avalonia.Controls;
+using Avalonia.Controls.Primitives;
+
+namespace Ursa.Controls;
+
+public class ControlClassesInput: TemplatedControl
+{
+    LinkedList<List<string>> _history = new();
+    LinkedList<List<string>> _undoHistory = new();
+    
+    public int CountOfHistoricalRecord { get; set; } = 10;
+    
+    public static readonly StyledProperty<Control?> TargetProperty = AvaloniaProperty.Register<ControlClassesInput, Control?>(
+        nameof(Target));
+
+    public Control? Target
+    {
+        get => GetValue(TargetProperty);
+        set => SetValue(TargetProperty, value);
+    }
+    
+    public static readonly StyledProperty<ObservableCollection<string>?> TargetClassesProperty = AvaloniaProperty.Register<ControlClassesInput, ObservableCollection<string>?>(
+        nameof(TargetClasses));
+    
+    public ObservableCollection<string>? TargetClasses
+    {
+        get => GetValue(TargetClassesProperty);
+        set => SetValue(TargetClassesProperty, value);
+    }
+
+    public static readonly AttachedProperty<ControlClassesInput?> SourceProperty =
+        AvaloniaProperty.RegisterAttached<ControlClassesInput, StyledElement, ControlClassesInput?>("Source");
+
+    public static void SetSource(StyledElement obj, ControlClassesInput value) => obj.SetValue(SourceProperty, value);
+    public static ControlClassesInput? GetSource(StyledElement obj) => obj.GetValue(SourceProperty);
+
+    static ControlClassesInput()
+    {
+        TargetClassesProperty.Changed.AddClassHandler<ControlClassesInput, ObservableCollection<string>?>((o,e)=>o.OnClassesChanged(e));
+        SourceProperty.Changed.AddClassHandler<StyledElement, ControlClassesInput?>(HandleSourceChange);
+    }
+
+    public ControlClassesInput()
+    {
+        TargetClasses = new ObservableCollection<string>();
+        TargetClasses.CollectionChanged += InccOnCollectionChanged;
+    }
+
+    private List<StyledElement> _targets = new();
+    
+    private static void HandleSourceChange(StyledElement arg1, AvaloniaPropertyChangedEventArgs<ControlClassesInput?> arg2)
+    {
+        var newControl = arg2.NewValue.Value;
+        if (newControl is null) return;
+        newControl._targets.Add(arg1);
+        var oldControl = arg2.OldValue.Value;
+        if (oldControl is not null)
+        {
+            newControl._targets.Remove(oldControl);
+        }
+    }
+
+    private static readonly char[] _separators = {' ', '\t', '\n', '\r'};
+    
+    private void OnClassesChanged(AvaloniaPropertyChangedEventArgs<ObservableCollection<string>?> args)
+    {
+        var newValue = args.NewValue.Value;
+        if (newValue is null)
+        {
+            SaveHistory(new List<string>());
+            return;
+        }
+        else
+        {
+            var classes = newValue.Where(a => !string.IsNullOrWhiteSpace(a)).Distinct().ToList();
+            SaveHistory(classes);
+            if (newValue is INotifyCollectionChanged incc)
+            {
+                incc.CollectionChanged+=InccOnCollectionChanged;
+            }
+            return;
+        }
+    }
+
+    private void InccOnCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
+    {
+        SaveHistory(TargetClasses?.ToList() ?? new List<string>());
+    }
+
+    private void SaveHistory(List<string> strings)
+    {
+        _history.AddLast(strings);
+        if (_history.Count > CountOfHistoricalRecord)
+        {
+            _history.RemoveFirst();
+        }
+        SetClassesToTarget();
+    }
+
+    private void SetClassesToTarget()
+    {
+        List<string> strings;
+        if (_history.Count == 0)
+        {
+            strings = new List<string>();
+        }
+        else
+        {
+            strings = _history.Last.Value;
+        }
+        if (Target is not null)
+        {
+            Target.Classes.Replace(strings);
+        }
+        foreach (var target in _targets)
+        {
+            target.Classes.Replace(strings);
+        }
+    }
+
+    public void UnDo()
+    {
+        var node = _history.Last;
+        _history.RemoveLast();
+        _undoHistory.AddFirst(node);
+        SetCurrentValue(TargetClassesProperty, new AvaloniaList<string>(node.Value));
+        SetClassesToTarget();
+    }
+
+    public void Redo()
+    {
+        var node = _undoHistory.First;
+        _undoHistory.RemoveFirst();
+        _history.AddLast(node);
+        SetCurrentValue(TargetClassesProperty, new AvaloniaList<string>(node.Value));
+        SetClassesToTarget();
+    }
+
+    public void Clear()
+    {
+        SaveHistory(new List<string>());
+    }
+}