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// Copyright (c) 2013-2025 Jean-Philippe Bruyère <jp_bruyere@hotmail.com>
//
// This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
using System;
using System.Diagnostics;
namespace Crow.Text
{
[DebuggerDisplay ("{Line}, {Column}, {VisualCharXPosition}")]
public struct CharLocation : IEquatable<CharLocation>
{
public readonly int Line;
/// <summary>
/// Character position in current line.
/// If Column value is '-1', the visualX must contains the on screen position, and column will be computed from it.
/// </summary>
public int Column;
/// <summary>
/// The column as presented to the user, counting spaces in tabulations.
/// Its value is set during computations.
/// </summary>
public int TabulatedColumn;
public double VisualCharXPosition;
public CharLocation (int line, int column, double visualX = -1) {
Line = line;
Column = column;
TabulatedColumn = -1;
VisualCharXPosition = visualX;
}
public bool HasVisualX => Column >= 0 && VisualCharXPosition >= 0;
public void ResetVisualX () => VisualCharXPosition = -1;
public static bool operator == (CharLocation a, CharLocation b)
=> a.Equals (b);
public static bool operator != (CharLocation a, CharLocation b)
=> !a.Equals (b);
public bool Equals (CharLocation other) {
return Column < 0 ?
Line == other.Line && VisualCharXPosition == other.VisualCharXPosition :
Line == other.Line && Column == other.Column;
}
public override bool Equals (object obj) => obj is CharLocation loc ? Equals (loc) : false;
public override int GetHashCode () {
return Column < 0 ?
HashCode.Combine (Line, VisualCharXPosition) :
HashCode.Combine (Line, Column);
}
public override string ToString () => $"{Line}, {Column}";
}
}
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