daily update on 20240901 by nitload youmu

源代码/StgSharp/MVVM/ViewModel/DataBinding.cs

@@ -28,13 +28,16 @@
 //     
 //-----------------------------------------------------------------------
 //-----------------------------------------------------------------------
+using StgSharp.Data;
+
 using System;
 using System.Collections.Generic;
 using System.Data.Common;
 using System.Diagnostics.CodeAnalysis;
+using System.IO;
 using System.Linq;
+using System.Reflection;
 using System.Runtime.InteropServices;
-using System.Security.Cryptography.X509Certificates;
 using System.Text;
 using System.Threading.Tasks;
 
@@ -45,10 +48,40 @@ namespace StgSharp.MVVM.ViewModel
     [UnmanagedFunctionPointer(CallingConvention.Cdecl)] public delegate ref object BindingDataGetter();
     [UnmanagedFunctionPointer(CallingConvention.Cdecl)] public delegate void BindingDataSetter(ref object value);
 
+    public abstract partial class ViewModelBase
+    {
+        public bool MethodLookup(string methodName, out Action callback)
+        {
+            MethodInfo method = GetType().GetMethod(methodName);
+            try
+            {
+                callback = (Action)Delegate.CreateDelegate(typeof(Action), this, methodName);
+                return true;
+            }
+            catch (MissingMethodException)
+            {
+                callback = null!;
+                return false;
+            }
+            catch (MethodAccessException)
+            {
+                callback = null!;
+                return false;
+            }
+            catch (Exception)
+            {
+                throw;
+            }
+
+        }
+    }
+
+    [StructLayout(LayoutKind.Explicit)]
     public unsafe struct DataBindingEntry
     {
-
-        private IntPtr getterPtr, setterPtr;
+        [FieldOffset(0)] private M128 _mask;
+        [FieldOffset(0)] private IntPtr getterPtr;
+        [FieldOffset(8)] private IntPtr setterPtr;
 
         public DataBindingEntry(
             [NotNull] BindingDataGetter gettingCallback,
@@ -73,11 +106,39 @@ namespace StgSharp.MVVM.ViewModel
             return ref ((delegate* unmanaged[Cdecl]<ref object>)getterPtr)();
         }
 
-        public void SetData(ref object value)
+        public void SetValue(ref object value)
         {
             ((delegate* unmanaged[Cdecl]<ref object, void>)setterPtr)(ref value);
         }
 
+        public static bool operator ==(DataBindingEntry left, DataBindingEntry right)
+        {
+            return left._mask == right._mask;
+        }
+
+        public static bool operator !=(DataBindingEntry left, DataBindingEntry right)
+        {
+            return left._mask != right._mask;
+        }
+
+        public bool Equals(DataBindingEntry other) 
+        {
+            return (_mask == other._mask);
+        }
+
+        public override bool Equals(object obj)
+        {
+            if (obj is not DataBindingEntry other)
+            {
+                return false;
+            }
+            return Equals(other);
+        }
+
+        public override int GetHashCode()
+        {
+            return _mask.GetHashCode();
+        }
     }
 
 #nullable restore