iframe-proxy | Sunbelt Computer Software

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﻿// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
using System.Globalization;
namespace System.Web.Razor.Text
    [Serializable]
    public struct SourceLocation : IEquatable<SourceLocation>, IComparable<SourceLocation>
        public static readonly SourceLocation Undefined = CreateUndefined();
        public static readonly SourceLocation Zero = new SourceLocation(0, 0, 0);
        private int _absoluteIndex;
        private int _lineIndex;
        private int _characterIndex;
        public SourceLocation(int absoluteIndex, int lineIndex, int characterIndex)
            _absoluteIndex = absoluteIndex;
            _lineIndex = lineIndex;
            _characterIndex = characterIndex;
        public int AbsoluteIndex
            get { return _absoluteIndex; }
        /// <summary>
        /// Gets the 1-based index of the line referred to by this Source Location.
        /// </summary>
        public int LineIndex
            get { return _lineIndex; }
        public int CharacterIndex
            get { return _characterIndex; }
        public override string ToString()
            return String.Format(CultureInfo.CurrentCulture, "({0}:{1},{2})", AbsoluteIndex, LineIndex, CharacterIndex);
        public override bool Equals(object obj)
            return (obj is SourceLocation) && Equals((SourceLocation)obj);
        public override int GetHashCode()
            // LineIndex and CharacterIndex can be calculated from AbsoluteIndex and the document content.
            return AbsoluteIndex;
        public bool Equals(SourceLocation other)
            return AbsoluteIndex == other.AbsoluteIndex &&
                   LineIndex == other.LineIndex &&
                   CharacterIndex == other.CharacterIndex;
        public int CompareTo(SourceLocation other)
            return AbsoluteIndex.CompareTo(other.AbsoluteIndex);
        public static SourceLocation Advance(SourceLocation left, string text)
            SourceLocationTracker tracker = new SourceLocationTracker(left);
            tracker.UpdateLocation(text);
            return tracker.CurrentLocation;
        public static SourceLocation Add(SourceLocation left, SourceLocation right)
            if (right.LineIndex > 0)
                // Column index doesn't matter
                return new SourceLocation(left.AbsoluteIndex + right.AbsoluteIndex, left.LineIndex + right.LineIndex, right.CharacterIndex);
            else
                return new SourceLocation(left.AbsoluteIndex + right.AbsoluteIndex, left.LineIndex + right.LineIndex, left.CharacterIndex + right.CharacterIndex);
        public static SourceLocation Subtract(SourceLocation left, SourceLocation right)
            return new SourceLocation(left.AbsoluteIndex - right.AbsoluteIndex,
                                      left.LineIndex - right.LineIndex,
                                      left.LineIndex != right.LineIndex ? left.CharacterIndex : left.CharacterIndex - right.CharacterIndex);
        private static SourceLocation CreateUndefined()
            SourceLocation sl = new SourceLocation();
            sl._absoluteIndex = -1;
            sl._lineIndex = -1;
            sl._characterIndex = -1;
            return sl;
        public static bool operator <(SourceLocation left, SourceLocation right)
            return left.CompareTo(right) < 0;
        public static bool operator >(SourceLocation left, SourceLocation right)
            return left.CompareTo(right) > 0;
        public static bool operator ==(SourceLocation left, SourceLocation right)
            return left.Equals(right);
        public static bool operator !=(SourceLocation left, SourceLocation right)
            return !left.Equals(right);
        public static SourceLocation operator +(SourceLocation left, SourceLocation right)
            return Add(left, right);
        public static SourceLocation operator -(SourceLocation left, SourceLocation right)
            return Subtract(left, right);
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