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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 implementations details that are subject to change without notice.
// Use at your own risk.
//
namespace Microsoft.VisualStudio.Text.Implementation
{
using System;
using System.IO;
sealed class FileNameKey
{
private readonly string _fileName;
private readonly int _hashCode;
public FileNameKey(string fileName)
{
//Gracefully catch errors getting the full path (which can happen if the file name is on a protected share).
try
{
_fileName = Path.GetFullPath(fileName);
}
catch
{
//This shouldn't happen (we are generally passed names associated with documents that we are expecting to open so
//we should have access). If we fail, we will, at worst not get the same underlying document when people create
//persistent spans using unnormalized names.
_fileName = fileName;
}
_hashCode = StringComparer.OrdinalIgnoreCase.GetHashCode(_fileName);
}
//Override equality and hash code
public override int GetHashCode()
{
return _hashCode;
}
public override bool Equals(object obj)
{
var other = obj as FileNameKey;
return (other != null) && string.Equals(_fileName, other._fileName, StringComparison.OrdinalIgnoreCase);
}
public override string ToString()
{
return _fileName;
}
}
}
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