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// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
using System;
using Tango.Scripting.Editors.Document;
namespace Tango.Scripting.Editors.Editing
{
/// <summary>
/// Represents a selected segment.
/// </summary>
public class SelectionSegment : ISegment
{
readonly int startOffset, endOffset;
readonly int startVC, endVC;
/// <summary>
/// Creates a SelectionSegment from two offsets.
/// </summary>
public SelectionSegment(int startOffset, int endOffset)
{
this.startOffset = Math.Min(startOffset, endOffset);
this.endOffset = Math.Max(startOffset, endOffset);
this.startVC = this.endVC = -1;
}
/// <summary>
/// Creates a SelectionSegment from two offsets and visual columns.
/// </summary>
public SelectionSegment(int startOffset, int startVC, int endOffset, int endVC)
{
if (startOffset < endOffset || (startOffset == endOffset && startVC <= endVC)) {
this.startOffset = startOffset;
this.startVC = startVC;
this.endOffset = endOffset;
this.endVC = endVC;
} else {
this.startOffset = endOffset;
this.startVC = endVC;
this.endOffset = startOffset;
this.endVC = startVC;
}
}
/// <summary>
/// Gets the start offset.
/// </summary>
public int StartOffset {
get { return startOffset; }
}
/// <summary>
/// Gets the end offset.
/// </summary>
public int EndOffset {
get { return endOffset; }
}
/// <summary>
/// Gets the start visual column.
/// </summary>
public int StartVisualColumn {
get { return startVC; }
}
/// <summary>
/// Gets the end visual column.
/// </summary>
public int EndVisualColumn {
get { return endVC; }
}
/// <inheritdoc/>
int ISegment.Offset {
get { return startOffset; }
}
/// <inheritdoc/>
public int Length {
get { return endOffset - startOffset; }
}
/// <inheritdoc/>
public override string ToString()
{
return string.Format("[SelectionSegment StartOffset={0}, EndOffset={1}, StartVC={2}, EndVC={3}]", startOffset, endOffset, startVC, endVC);
}
}
}
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