205 lines
7.8 KiB
C#
205 lines
7.8 KiB
C#
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// Copyright (c) 2010-2014 SharpDX - Alexandre Mutel
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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using System;
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using System.Collections.Generic;
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using System.Runtime.InteropServices;
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namespace SharpDX.Win32
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{
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/// <summary>
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/// Implementation of OLE IPropertyBag2.
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/// </summary>
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/// <unmanaged>IPropertyBag2</unmanaged>
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public class PropertyBag : ComObject
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{
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private IPropertyBag2 nativePropertyBag;
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/// <summary>
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/// Initializes a new instance of the <see cref="PropertyBag"/> class.
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/// </summary>
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/// <param name="propertyBagPointer">The property bag pointer.</param>
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public PropertyBag(IntPtr propertyBagPointer) : base(propertyBagPointer)
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{
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}
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protected override void NativePointerUpdated(IntPtr oldNativePointer)
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{
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base.NativePointerUpdated(oldNativePointer);
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if (NativePointer != IntPtr.Zero)
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nativePropertyBag = (IPropertyBag2)Marshal.GetObjectForIUnknown(NativePointer);
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else
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nativePropertyBag = null;
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}
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private void CheckIfInitialized()
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{
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if (nativePropertyBag == null)
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throw new InvalidOperationException("This instance is not bound to an unmanaged IPropertyBag2");
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}
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/// <summary>
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/// Gets the number of properties.
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/// </summary>
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public int Count
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{
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get
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{
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CheckIfInitialized();
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int propertyCount;
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nativePropertyBag.CountProperties(out propertyCount);
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return propertyCount;
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}
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}
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/// <summary>
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/// Gets the keys.
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/// </summary>
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public string[] Keys
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{
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get
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{
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CheckIfInitialized();
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var keys = new List<string>();
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for (int i = 0; i < Count; i++)
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{
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PROPBAG2 propbag2;
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int temp;
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nativePropertyBag.GetPropertyInfo(i, 1, out propbag2, out temp);
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keys.Add(propbag2.Name);
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}
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return keys.ToArray();
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}
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}
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/// <summary>
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/// Gets the value of the property with this name.
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/// </summary>
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/// <param name="name">The name.</param>
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/// <returns>Value of the property</returns>
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public object Get(string name)
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{
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CheckIfInitialized();
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object value;
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var propbag2 = new PROPBAG2() {Name = name};
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Result error;
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// Gets the property
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var result = nativePropertyBag.Read(1, ref propbag2, IntPtr.Zero, out value, out error);
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if (result.Failure || error.Failure)
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throw new InvalidOperationException(string.Format(System.Globalization.CultureInfo.InvariantCulture, "Property with name [{0}] is not valid for this instance", name));
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propbag2.Dispose();
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return value;
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}
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/// <summary>
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/// Gets the value of the property by using a <see cref="PropertyBagKey{T1,T2}"/>
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/// </summary>
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/// <typeparam name="T1">The public type of this property.</typeparam>
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/// <typeparam name="T2">The marshaling type of this property.</typeparam>
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/// <param name="propertyKey">The property key.</param>
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/// <returns>Value of the property</returns>
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public T1 Get<T1, T2>(PropertyBagKey<T1, T2> propertyKey)
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{
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var value = Get(propertyKey.Name);
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return (T1) Convert.ChangeType(value, typeof (T1));
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}
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/// <summary>
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/// Sets the value of the property with this name
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/// </summary>
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/// <param name="name">The name.</param>
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/// <param name="value">The value.</param>
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public void Set(string name, object value)
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{
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CheckIfInitialized();
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// In order to set a property in the property bag
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// we need to convert the value to the destination type
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var previousValue = Get(name);
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value = Convert.ChangeType(value, previousValue==null?value.GetType() : previousValue.GetType());
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// Set the property
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var propbag2 = new PROPBAG2() { Name = name };
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var result = nativePropertyBag.Write(1, ref propbag2, value);
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result.CheckError();
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propbag2.Dispose();
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}
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/// <summary>
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/// Sets the value of the property by using a <see cref="PropertyBagKey{T1,T2}"/>
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/// </summary>
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/// <typeparam name="T1">The public type of this property.</typeparam>
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/// <typeparam name="T2">The marshaling type of this property.</typeparam>
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/// <param name="propertyKey">The property key.</param>
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/// <param name="value">The value.</param>
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public void Set<T1,T2>(PropertyBagKey<T1,T2> propertyKey, T1 value)
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{
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Set(propertyKey.Name, value);
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}
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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private struct PROPBAG2 : IDisposable
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{
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internal uint type;
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internal ushort vt;
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internal ushort cfType;
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internal IntPtr dwHint;
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internal IntPtr pstrName;
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internal Guid clsid;
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public string Name
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{
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get
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{
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unsafe
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{
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return Marshal.PtrToStringUni(pstrName);
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}
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}
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set
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{
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pstrName = Marshal.StringToCoTaskMemUni(value);
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}
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}
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public void Dispose()
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{
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if (pstrName != IntPtr.Zero)
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{
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Marshal.FreeCoTaskMem(pstrName);
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pstrName = IntPtr.Zero;
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}
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}
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}
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[ComImport, InterfaceType(ComInterfaceType.InterfaceIsIUnknown), Guid("22F55882-280B-11D0-A8A9-00A0C90C2004")]
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private interface IPropertyBag2
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{
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[PreserveSig()]
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Result Read([In] int cProperties, [In] ref PROPBAG2 pPropBag, IntPtr pErrLog, [Out] out object pvarValue, out Result phrError);
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[PreserveSig()]
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Result Write([In] int cProperties, [In] ref PROPBAG2 pPropBag, ref object value);
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[PreserveSig()]
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Result CountProperties(out int pcProperties);
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[PreserveSig()]
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Result GetPropertyInfo([In] int iProperty, [In] int cProperties, out PROPBAG2 pPropBag, out int pcProperties);
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[PreserveSig()]
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Result LoadObject([In, MarshalAs(UnmanagedType.LPWStr)] string pstrName, [In] uint dwHint, [In, MarshalAs(UnmanagedType.IUnknown)] object pUnkObject, IntPtr pErrLog);
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}
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}
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}
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