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//
// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License. See License.txt in the project root for license information.
//
// This file contain internal APIs that are subject to change without notice.
// Use at your own risk.
//
using System.Collections;
using System.Collections.Generic;
using Microsoft.VisualStudio.Text.Formatting;
namespace Microsoft.VisualStudio.Text.Editor
{
#pragma warning disable CA1710 // Identifiers should have correct suffix
/// <summary>
/// Represents a range in the <see cref="TextBuffer"/> that behaves relative to the view in which it lives.
/// </summary>
public abstract class DisplayTextRange : TextRange, IEnumerable<DisplayTextPoint>
#pragma warning restore CA1710 // Identifiers should have correct suffix
{
/// <summary>
/// When implemented in a derived class, gets the <see cref="TextView"/> of this range.
/// </summary>
public abstract TextView TextView { get; }
/// <summary>
/// Creates a clone of this text range than can be moved independently of this one.
/// </summary>
public new DisplayTextRange Clone()
{
return CloneDisplayTextRangeInternal();
}
/// <summary>
/// When implemented in a derived class, gets the start point of this text range.
/// </summary>
public abstract DisplayTextPoint GetDisplayStartPoint();
/// <summary>
/// When implemented in a derived class, gets the end point of this text range.
/// </summary>
public abstract DisplayTextPoint GetDisplayEndPoint();
/// <summary>
/// When implemented in a derived class, gets the visibility state of this text range.
/// </summary>
public abstract VisibilityState Visibility { get; }
/// <summary>
/// Clones this text range.
/// </summary>
/// <returns>The cloned <see cref="TextRange"/>.</returns>
protected override TextRange CloneInternal()
{
return CloneDisplayTextRangeInternal();
}
/// <summary>
/// When implemented in a derived class, clones the <see cref="DisplayTextRange"/>.
/// </summary>
protected abstract DisplayTextRange CloneDisplayTextRangeInternal();
/// <summary>
/// When implemented in a derived class, gets the enumerator of type <see cref="DisplayTextPoint"/>.
/// </summary>
/// <returns></returns>
protected abstract IEnumerator<DisplayTextPoint> GetDisplayPointEnumeratorInternal();
#region IEnumerable<DisplayTextPoint> Members
/// <summary>
/// Gets an enumerator of type <see cref="DisplayTextPoint"/>.
/// </summary>
/// <returns></returns>
public new IEnumerator<DisplayTextPoint> GetEnumerator()
{
return GetDisplayPointEnumeratorInternal();
}
#endregion
#region IEnumerable Members
/// <summary>
/// Gets the enumerator.
/// </summary>
/// <returns></returns>
IEnumerator IEnumerable.GetEnumerator()
{
return GetEnumerator();
}
#endregion
}
}
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