source: branches/2929_PrioritizedGrammarEnumeration/HeuristicLab.ExtLibs/HeuristicLab.AvalonEdit/5.0.1/AvalonEdit-5.0.1/TextEditorAutomationPeer.cs @ 16147

// Copyright (c) 2014 AlphaSierraPapa for the SharpDevelop Team
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy of this
// software and associated documentation files (the "Software"), to deal in the Software
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// to whom the Software is furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in all copies or
// substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
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using System;
using System.Diagnostics;
using System.Windows.Automation;
using System.Windows.Automation.Peers;
using System.Windows.Automation.Provider;
using System.Windows.Controls;

using ICSharpCode.AvalonEdit.Utils;

namespace ICSharpCode.AvalonEdit
{
  /// <summary>
  /// Exposes <see cref="TextEditor"/> to automation.
  /// </summary>
  public class TextEditorAutomationPeer : FrameworkElementAutomationPeer, IValueProvider
  {
    /// <summary>
    /// Creates a new TextEditorAutomationPeer instance.
    /// </summary>
    public TextEditorAutomationPeer(TextEditor owner) : base(owner)
    {
      Debug.WriteLine("TextEditorAutomationPeer was created");
    }
    
    private TextEditor TextEditor {
      get { return (TextEditor)base.Owner; }
    }
    
    void IValueProvider.SetValue(string value)
    {
      this.TextEditor.Text = value;
    }
    
    string IValueProvider.Value {
      get { return this.TextEditor.Text; }
    }
    
    bool IValueProvider.IsReadOnly {
      get { return this.TextEditor.IsReadOnly; }
    }
    
    /// <inheritdoc/>
    public override object GetPattern(PatternInterface patternInterface)
    {
      if (patternInterface == PatternInterface.Value)
        return this;
      
      if (patternInterface == PatternInterface.Scroll) {
        ScrollViewer scrollViewer = this.TextEditor.ScrollViewer;
        if (scrollViewer != null)
          return UIElementAutomationPeer.CreatePeerForElement(scrollViewer);
      }
      
      return base.GetPattern(patternInterface);
    }
    
    internal void RaiseIsReadOnlyChanged(bool oldValue, bool newValue)
    {
      RaisePropertyChangedEvent(ValuePatternIdentifiers.IsReadOnlyProperty, Boxes.Box(oldValue), Boxes.Box(newValue));
    }
  }
}