|
//---------------------------------------------------------------------------
//
// Copyright (C) Microsoft Corporation. All rights reserved.
//
// File: FlowDocumentScrollViewerAutomationPeer.cs
//
// Description: AutomationPeer associated with FlowDocumentScrollViewer.
//
//---------------------------------------------------------------------------
using System.Collections.Generic; // List<T>
using System.Windows.Automation.Provider; // IScrollProvider
using System.Windows.Controls; // FlowDocumentScrollViewer
using System.Windows.Documents; // FlowDocument
using MS.Internal.Documents; // IFlowDocumentViewer
namespace System.Windows.Automation.Peers
{
/// <summary>
/// AutomationPeer associated with FlowDocumentScrollViewer.
/// </summary>
public class FlowDocumentScrollViewerAutomationPeer : FrameworkElementAutomationPeer
{
/// <summary>
/// Constructor.
/// </summary>
/// <param name="owner">Owner of the AutomationPeer.</param>
public FlowDocumentScrollViewerAutomationPeer(FlowDocumentScrollViewer owner)
: base(owner)
{ }
/// <summary>
/// <see cref="AutomationPeer.GetPattern"/>
/// </summary>
public override object GetPattern(PatternInterface patternInterface)
{
object returnValue = null;
if (patternInterface == PatternInterface.Scroll)
{
FlowDocumentScrollViewer owner = (FlowDocumentScrollViewer)Owner;
if (owner.ScrollViewer != null)
{
AutomationPeer scrollPeer = UIElementAutomationPeer.CreatePeerForElement(owner.ScrollViewer);
if (scrollPeer != null && scrollPeer is IScrollProvider)
{
scrollPeer.EventsSource = this;
returnValue = scrollPeer;
}
}
}
else if (patternInterface == PatternInterface.Text)
{
// Make sure that Automation children are created.
this.GetChildren();
// Re-expose TextPattern from hosted document.
if (_documentPeer != null)
{
_documentPeer.EventsSource = this;
returnValue = _documentPeer.GetPattern(patternInterface);
}
}
else if (patternInterface == PatternInterface.SynchronizedInput)
{
returnValue = base.GetPattern(patternInterface);
}
return returnValue;
}
/// <summary>
/// <see cref="AutomationPeer.GetChildrenCore"/>
/// </summary>
/// <remarks>
/// AutomationPeer associated with FlowDocumentScrollViewer returns an AutomationPeer
/// for hosted Document and for elements in the style.
/// </remarks>
protected override List<AutomationPeer> GetChildrenCore()
{
// Get children for all elements in the style.
List<AutomationPeer> children = base.GetChildrenCore();
// If the owner is IFlowDocumentViewer, it means that it is embedded inside
// FlowDocumentReaer. In this case DocumentAutumationPeer is already exposed.
// Hence there is no need to add it to children collection.
if (!(Owner is IFlowDocumentViewer))
{
// Add AutomationPeer associated with the document.
// Make it the first child of the collection.
FlowDocument document = ((FlowDocumentScrollViewer)Owner).Document;
if (document != null)
{
AutomationPeer documentPeer = ContentElementAutomationPeer.CreatePeerForElement(document);
if (_documentPeer != documentPeer)
{
if (_documentPeer != null)
{
_documentPeer.OnDisconnected();
}
_documentPeer = documentPeer as DocumentAutomationPeer;
}
if (documentPeer != null)
{
if (children == null)
{
children = new List<AutomationPeer>();
}
children.Add(documentPeer);
}
}
}
return children;
}
/// <summary>
/// <see cref="AutomationPeer.GetAutomationControlTypeCore"/>
/// </summary>
protected override AutomationControlType GetAutomationControlTypeCore()
{
return AutomationControlType.Document;
}
/// <summary>
/// <see cref="AutomationPeer.GetClassNameCore"/>
/// </summary>
protected override string GetClassNameCore()
{
return "FlowDocumentScrollViewer";
}
private DocumentAutomationPeer _documentPeer;
}
}
|