//---------------------------------------------------------------------------
//
// Copyright (C) Microsoft Corporation.  All rights reserved.
// 
// File: HyperlinkAutomationPeer.cs
//
// Description: Automation peer for hyperlink
//
//---------------------------------------------------------------------------
 
using System.Windows.Automation.Provider;   // IRawElementProviderSimple
using System.Windows.Documents;
 
namespace System.Windows.Automation.Peers
{
    ///
    public class HyperlinkAutomationPeer : TextElementAutomationPeer, IInvokeProvider
    {
        ///
        public HyperlinkAutomationPeer(Hyperlink owner)
            : base(owner)
        { }
 
        /// <summary>
        /// 
        /// </summary>
        /// <param name="patternInterface"></param>
        /// <returns></returns>
        public override object GetPattern(PatternInterface patternInterface)
        {
            if (patternInterface == PatternInterface.Invoke)
            {
                return this;
            }
            else
            {
                return base.GetPattern(patternInterface);
            }
        }
 
        //Default Automation properties
        ///
        protected override AutomationControlType GetAutomationControlTypeCore()
        {
            return AutomationControlType.Hyperlink;
        }
 
        /// <summary>
        /// 
        /// </summary>
        protected override string GetNameCore()
        {
            string name = base.GetNameCore();
 
            if (name == string.Empty)
            {
                Hyperlink owner = (Hyperlink)Owner;
 
                name = owner.Text;
 
                if (name == null)
                    name = string.Empty;
            }
 
            return name;
        }
 
        ///
        override protected string GetClassNameCore()
        {
            return "Hyperlink";
        }
 
        /// <summary>
        /// <see cref="AutomationPeer.IsControlElementCore"/>
        /// </summary>
        override protected bool IsControlElementCore()
        {
            // We only want this peer to show up in the Control view if it is visible
            // For compat we allow falling back to legacy behavior (returning true always)
            // based on AppContext flags, IncludeInvisibleElementsInControlView evaluates them.
            return IncludeInvisibleElementsInControlView || IsTextViewVisible == true;
        }
 
        //Invoke Pattern implementation
        void IInvokeProvider.Invoke()
        {
            if (!IsEnabled())
                throw new ElementNotEnabledException();
 
            Hyperlink owner = (Hyperlink)Owner;
            owner.DoClick();
        }
    }
}