75 lines
2.4 KiB
C#
75 lines
2.4 KiB
C#
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// <copyright>
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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namespace System.Activities.Debugger
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{
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using System.Diagnostics;
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// Immutable, lineNumber and linePosition always non-null.
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[DebuggerDisplay("({LineNumber.Value}:{LinePosition.Value})")]
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internal class DocumentLocation : IEquatable<DocumentLocation>, IComparable<DocumentLocation>
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{
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private OneBasedCounter lineNumber;
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private OneBasedCounter linePosition;
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internal DocumentLocation(OneBasedCounter lineNumber, OneBasedCounter linePosition)
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{
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UnitTestUtility.Assert(lineNumber != null, "lineNumber should not be null.");
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UnitTestUtility.Assert(linePosition != null, "linePosition should not be null.");
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this.lineNumber = lineNumber;
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this.linePosition = linePosition;
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}
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internal DocumentLocation(int lineNumber, int linePosition)
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: this(new OneBasedCounter(lineNumber), new OneBasedCounter(linePosition))
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{
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}
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internal OneBasedCounter LineNumber
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{
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get { return this.lineNumber; }
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}
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internal OneBasedCounter LinePosition
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{
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get { return this.linePosition; }
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}
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public bool Equals(DocumentLocation that)
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{
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if (that == null)
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{
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return false;
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}
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return (this.lineNumber.Value == that.lineNumber.Value) && (this.linePosition.Value == that.linePosition.Value);
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}
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public override int GetHashCode()
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{
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return this.lineNumber.Value.GetHashCode() ^ this.linePosition.Value.GetHashCode();
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}
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public int CompareTo(DocumentLocation that)
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{
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if (that == null)
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{
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// Following the convention we have in System.Int32 that anything is considered bigger than null.
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return 1;
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}
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if (this.lineNumber.Value == that.lineNumber.Value)
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{
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// The subtraction of two numbers >= 1 must not underflow integer.
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return this.linePosition.Value - that.linePosition.Value;
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}
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else
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{
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// The subtraction of two numbers >= 1 must not underflow integer.
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return this.lineNumber.Value - that.lineNumber.Value;
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}
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}
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}
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}
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