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//---------------------------------------------------------------------------
//
// File: PasswordBoxAutomationPeer.cs
//
// Copyright (C) Microsoft Corporation. All rights reserved.
//
// Description: The AutomationPeer for PasswordBox.
//
//---------------------------------------------------------------------------
using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Security;
using System.Text;
using System.Windows;
using System.Windows.Automation.Provider;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Interop;
using System.Windows.Media;
using System.Windows.Documents;
using MS.Internal;
using MS.Internal.Automation;
using MS.Win32;
namespace System.Windows.Automation.Peers
{
///
public class PasswordBoxAutomationPeer : TextAutomationPeer, IValueProvider
{
/// <summary>
/// Constructor
/// </summary>
/// <param name="owner">PasswordBox for which this is an AutomationPeer</param>
public PasswordBoxAutomationPeer(PasswordBox owner) : base(owner)
{
}
/// <summary>
/// Class name for the type for which this is a peer.
/// </summary>
/// <returns></returns>
override protected string GetClassNameCore()
{
return "PasswordBox";
}
/// <summary>
/// Type for which this is a peer.
/// </summary>
/// <returns></returns>
override protected AutomationControlType GetAutomationControlTypeCore()
{
return AutomationControlType.Edit;
}
/// <summary>
/// Return the patterns supported by PasswordBoxAutomationPeer
/// </summary>
/// <param name="patternInterface"></param>
/// <returns></returns>
override public object GetPattern(PatternInterface patternInterface)
{
object returnValue = null;
if (patternInterface == PatternInterface.Value)
{
returnValue = this;
}
else if (patternInterface == PatternInterface.Text)
{
if (_textPattern == null)
{
_textPattern = new TextAdaptor(this, ((PasswordBox)Owner).TextContainer);
}
returnValue = _textPattern;
}
else if (patternInterface == PatternInterface.Scroll)
{
PasswordBox owner = (PasswordBox)Owner;
if (owner.ScrollViewer != null)
{
returnValue = owner.ScrollViewer.CreateAutomationPeer();
((AutomationPeer)returnValue).EventsSource = this;
}
}
else
{
returnValue = base.GetPattern(patternInterface);
}
return returnValue;
}
/// <summary>
/// Indicates whether or not this is a password control
/// </summary>
/// <returns>true</returns>
override protected bool IsPasswordCore()
{
return true;
}
bool IValueProvider.IsReadOnly
{
get
{
return false;
}
}
string IValueProvider.Value
{
get
{
// DDVSO 404634: We shouldn't throw InvalidOperationException, return an empty string instead
if (AccessibilitySwitches.UseNetFx47CompatibleAccessibilityFeatures)
{
throw new InvalidOperationException();
}
else
{
return string.Empty;
}
}
}
void IValueProvider.SetValue(string value)
{
if(!IsEnabled())
throw new ElementNotEnabledException();
PasswordBox owner = (PasswordBox)Owner;
if (value == null)
{
throw new ArgumentNullException("value");
}
owner.Password = value;
}
//
[System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.NoInlining)]
internal void RaiseValuePropertyChangedEvent(string oldValue, string newValue)
{
if (oldValue != newValue)
{
RaisePropertyChangedEvent(ValuePatternIdentifiers.ValueProperty, oldValue, newValue);
}
}
//
[System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.NoInlining)]
internal void RaiseIsReadOnlyPropertyChangedEvent(bool oldValue, bool newValue)
{
if (oldValue != newValue)
{
RaisePropertyChangedEvent(ValuePatternIdentifiers.IsReadOnlyProperty, oldValue, newValue);
}
}
/// <summary>
/// Gets collection of AutomationPeers for given text range.
/// </summary>
internal override List<AutomationPeer> GetAutomationPeersFromRange(ITextPointer start, ITextPointer end)
{
return new List<AutomationPeer>();
}
private TextAdaptor _textPattern;
}
}
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