MVVM rebuild complete

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

@@ -0,0 +1,83 @@
+//-----------------------------------------------------------------------
+//-----------------------------------------------------------------------
+//     file="DataBinding.cs"
+//     Project: StgSharp
+//     AuthorGroup: Nitload Space
+//     Copyright (c) Nitload Space. All rights reserved.
+//     
+//     Permission is hereby granted, free of charge, to any person 
+//     obtaining a copy of this software and associated documentation 
+//     files (the “Software”), to deal in the Software without restriction, 
+//     including without limitation the rights to use, copy, modify, merge,
+//     publish, distribute, sublicense, and/or sell copies of the Software, 
+//     and to permit persons to whom the Software is furnished to do so, 
+//     subject to the following conditions:
+//     
+//     The above copyright notice and 
+//     this permission notice shall be included in all copies 
+//     or substantial portions of the Software.
+//     
+//     THE SOFTWARE IS PROVIDED “AS IS”, 
+//     WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, 
+//     INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+//     FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
+//     IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
+//     DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 
+//     ARISING FROM, OUT OF OR IN CONNECTION WITH 
+//     THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//     
+//-----------------------------------------------------------------------
+//-----------------------------------------------------------------------
+using System;
+using System.Collections.Generic;
+using System.Data.Common;
+using System.Diagnostics.CodeAnalysis;
+using System.Linq;
+using System.Runtime.InteropServices;
+using System.Security.Cryptography.X509Certificates;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StgSharp.MVVM.ViewModel
+{
+#nullable enable
+
+    [UnmanagedFunctionPointer(CallingConvention.Cdecl)] public delegate ref object BindingDataGetter();
+    [UnmanagedFunctionPointer(CallingConvention.Cdecl)] public delegate void BindingDataSetter(ref object value);
+
+    public unsafe struct DataBindingEntry
+    {
+        private IntPtr getterPtr, setterPtr;
+
+        public DataBindingEntry(
+            [NotNull] BindingDataGetter gettingCallback,
+            [NotNull] BindingDataSetter settingCallback)
+        {
+            getterPtr = Marshal.GetFunctionPointerForDelegate(gettingCallback);
+            setterPtr = Marshal.GetFunctionPointerForDelegate(settingCallback);
+        }
+
+        public static DataBindingEntry NullBinding
+        {
+            get => new DataBindingEntry();
+        }
+
+        public bool ExactEqual(DataBindingEntry other)
+        {
+            return (getterPtr == other.getterPtr) && (setterPtr == other.setterPtr);
+        }
+
+        public ref object GetValue()
+        {
+            return ref ((delegate* unmanaged[Cdecl]<ref object>)getterPtr)();
+        }
+
+        public void SetData(ref object value)
+        {
+            ((delegate* unmanaged[Cdecl]<ref object, void>)setterPtr)(ref value);
+        }
+
+    }
+
+#nullable restore
+}