/// <summary>
/// Make the given path relative to the project file.
/// </summary>
protected internal string MakeProjectRelative(string filename)
{
string projectPath;
ErrorHandler.ThrowOnFailure(ProjectMgr.GetCanonicalName((uint)VSConstants.VSITEMID.Root, out projectPath));
// Try to use common prefix to avoid upper/lower differences.
var i = 0;
var max = Math.Min(filename.Length, projectPath.Length);
while (i < max)
{
if (char.ToUpper(filename[i]) != char.ToUpper(projectPath[i]))
{
break;
}
i++;
}
if (i > 0)
{
projectPath = filename.Substring(0, i) + projectPath.Substring(i);
}
var result = PackageUtilities.MakeRelative(projectPath, filename);
return(result);
}