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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
//
//
// Description: Manages Text Services Compartment.
//
//
using System.Runtime.InteropServices;
using MS.Win32;
namespace System.Windows.Input
{
//------------------------------------------------------
//
// TextServicesCompartment class
//
//------------------------------------------------------
internal class TextServicesCompartment
{
//------------------------------------------------------
//
// Constructors
//
//------------------------------------------------------
internal TextServicesCompartment(Guid guid, UnsafeNativeMethods.ITfCompartmentMgr compartmentmgr)
{
_guid = guid;
_compartmentmgr = compartmentmgr;
_cookie = UnsafeNativeMethods.TF_INVALID_COOKIE;
}
//------------------------------------------------------
//
// Public Methods
//
//------------------------------------------------------
#region Public Methods
#endregion Public Methods
//------------------------------------------------------
//
// Public Operators
//
//------------------------------------------------------
//------------------------------------------------------
//
// Public Properties
//
//------------------------------------------------------
//------------------------------------------------------
//
// Public Events
//
//------------------------------------------------------
//------------------------------------------------------
//
// Protected Methods
//
//------------------------------------------------------
//------------------------------------------------------
//
// Internal Methods
//
//------------------------------------------------------
#region Internal Methods
/// <summary>
/// Advise the notify sink of the compartment update.
/// </summary>
internal void AdviseNotifySink(UnsafeNativeMethods.ITfCompartmentEventSink sink)
{
Debug.Assert(_cookie == UnsafeNativeMethods.TF_INVALID_COOKIE, "cookie is already set.");
UnsafeNativeMethods.ITfCompartment compartment = GetITfCompartment();
if (compartment == null)
return;
UnsafeNativeMethods.ITfSource source = compartment as UnsafeNativeMethods.ITfSource;
// workaround because I can't pass a ref to a readonly constant
Guid guid = UnsafeNativeMethods.IID_ITfCompartmentEventSink;
source.AdviseSink(ref guid, sink, out _cookie);
Marshal.ReleaseComObject(compartment);
Marshal.ReleaseComObject(source);
}
/// <summary>
/// Unadvise the notify sink of the compartment update.
/// </summary>
internal void UnadviseNotifySink()
{
Debug.Assert(_cookie != UnsafeNativeMethods.TF_INVALID_COOKIE, "cookie is not set.");
UnsafeNativeMethods.ITfCompartment compartment = GetITfCompartment();
if (compartment == null)
return;
UnsafeNativeMethods.ITfSource source = compartment as UnsafeNativeMethods.ITfSource;
source.UnadviseSink(_cookie);
_cookie = UnsafeNativeMethods.TF_INVALID_COOKIE;
Marshal.ReleaseComObject(compartment);
Marshal.ReleaseComObject(source);
}
/// <summary>
/// Retrieve ITfCompartment
/// </summary>
internal UnsafeNativeMethods.ITfCompartment GetITfCompartment()
{
UnsafeNativeMethods.ITfCompartment itfcompartment;
_compartmentmgr.GetCompartment(ref _guid, out itfcompartment);
return itfcompartment;
}
#endregion Internal methods
//------------------------------------------------------
//
// Internal Properties
//
//------------------------------------------------------
#region Internal Properties
/// <summary>
/// Cast the compartment variant to bool.
/// </summary>
internal bool BooleanValue
{
get
{
object obj = Value;
if (obj == null)
return false;
if ((int)obj != 0)
return true;
return false;
}
set
{
Value = value ? 1 : 0;
}
}
/// <summary>
/// Cast the compartment variant to int.
/// </summary>
internal int IntValue
{
get
{
object obj = Value;
if (obj == null)
return 0;
return (int)obj;
}
set
{
Value = value;
}
}
/// <summary>
/// Get the compartment variant.
/// </summary>
internal object Value
{
get
{
UnsafeNativeMethods.ITfCompartment compartment = GetITfCompartment();
if (compartment == null)
return null;
object obj;
compartment.GetValue(out obj);
Marshal.ReleaseComObject(compartment);
return obj;
}
set
{
UnsafeNativeMethods.ITfCompartment compartment = GetITfCompartment();
if (compartment == null)
return;
compartment.SetValue(0 /* clientid */, ref value);
Marshal.ReleaseComObject(compartment);
}
}
#endregion Internal Properties
//------------------------------------------------------
//
// Private Methods
//
//------------------------------------------------------
//------------------------------------------------------
//
// Private Fields
//
//------------------------------------------------------
#region Private Fields
private readonly UnsafeNativeMethods.ITfCompartmentMgr _compartmentmgr;
private Guid _guid;
private int _cookie;
#endregion Private Fields
}
}
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