public PageCursor(UsageMap _enclosing)
{
this._enclosing = _enclosing;
_forwardDirHandler = new UsageMap.PageCursor.ForwardDirHandler(this);
_reverseDirHandler = new UsageMap.PageCursor.ReverseDirHandler(this);
this.Reset();
}
/// <summary>Gets another page in the given direction, returning the new page.</summary>
/// <remarks>Gets another page in the given direction, returning the new page.</remarks>
private int GetAnotherPage(bool moveForward)
{
UsageMap.PageCursor.DirHandler handler = this.GetDirHandler(moveForward);
if (this._curPageNumber == handler.GetEndPageNumber())
{
if (!this.IsUpToDate())
{
this.RestorePosition(this._prevPageNumber);
}
else
{
// drop through and retry moving to another page
// at end, no more
return(this._curPageNumber);
}
}
this.CheckForModification();
this._prevPageNumber = this._curPageNumber;
this._curPageNumber = handler.GetAnotherPageNumber(this._curPageNumber);
return(this._curPageNumber);
}