/// <summary>
/// Sets the enumerator to its initial position, which is before the first file in the
/// directory.
/// </summary>
public void Reset()
{
Dispose();
currentState = new EnumerationInfoState(search);
currentEnumerator = currentState.Enumerator;
stateList.Add(currentState);
}
/// <summary>
/// Ends the current state and procedes to the next available state.<para/>
/// If there are no states after this one in the list, then the state list is backtracked.
/// </summary>
private void NextState()
{
// Cleanup the current enumerator.
currentEnumerator.Dispose();
// Remove the current state
stateList.RemoveAt(stateIndex);
if (stateIndex == stateList.Count)
{
// We've hit the end, recurse backwards to find
// states that haven't finished subdir scans.
if (stateList.Count > 0)
{
currentState = stateList[--stateIndex];
}
else // End of the line, pal
{
currentState = null;
}
}
else
{
// Goto the next available queued state
currentState = stateList[stateIndex];
}
// Assign the shortcut to the current enumerator
currentEnumerator = currentState?.Enumerator;
}
/// <summary>Constructs the <see cref="AllDepthsInfoEnumerator"/>.</summary>
///
/// <param name="search">The information about the search.</param>
public AllDepthsInfoEnumerator(SearchInfo search)
{
this.search = search;
currentState = new EnumerationInfoState(search);
currentEnumerator = currentState.Enumerator;
stateQueue = new Queue <EnumerationInfoState>();
stateQueue.Enqueue(currentState);
}
/// <summary>
/// Pushes the current result as a new enumeration state and Immediately switches to it.
/// </summary>
private void PushState()
{
var newState = new EnumerationInfoState(currentEnumerator.Current.FullName, search);
stateStack.Push(newState);
currentState = newState;
currentEnumerator = newState.Enumerator;
}
/// <summary>Constructs the <see cref="AllSubdirectoriesInfoEnumerator"/>.</summary>
///
/// <param name="search">The information about the search.</param>
public AllSubdirectoriesInfoEnumerator(SearchInfo search)
{
this.search = search;
currentState = new EnumerationInfoState(search);
currentEnumerator = currentState.Enumerator;
stateStack = new Stack <EnumerationInfoState>();
stateStack.Push(currentState);
}
/// <summary>Constructs the <see cref="AllDirectoriesInfoEnumerator"/>.</summary>
///
/// <param name="search">The information about the search.</param>
public AllDirectoriesInfoEnumerator(SearchInfo search)
{
this.search = search;
currentState = new EnumerationInfoState(search);
currentEnumerator = currentState.Enumerator;
stateList = new List <EnumerationInfoState> {
currentState
};
stateIndex = 0;
}
/// <summary>Disposes of the enumerator.</summary>
public void Dispose()
{
while (stateQueue.Count > 0)
{
stateQueue.Dequeue().Enumerator.Dispose();
}
current = null;
currentState = null;
currentEnumerator = null;
}
/// <summary>Disposes of the enumerator.</summary>
public void Dispose()
{
while (stateStack.Count > 0)
{
stateStack.Pop().Enumerator.Dispose();
}
current = null;
currentState = null;
currentEnumerator = null;
}
/// <summary>Disposes of the enumerator.</summary>
public void Dispose()
{
for (int i = 0; i < stateList.Count; i++)
{
stateList[i].Enumerator.Dispose();
}
stateList.Clear();
current = null;
currentState = null;
currentEnumerator = null;
stateIndex = 0;
}
/// <summary>Ends the current state and procedes to the next available state.</summary>
private void DequeueState()
{
currentEnumerator.Dispose();
stateQueue.Dequeue();
if (stateQueue.Count > 0)
{
currentState = stateQueue.Peek();
}
else
{
currentState = null;
}
currentEnumerator = currentState?.Enumerator;
}
/// <summary>Ends the current state and backtracks to the last state.</summary>
private void PopState()
{
// Cleanup the current enumerator.
currentEnumerator.Dispose();
// Remove the current state
stateStack.Pop();
if (stateStack.Count > 0)
{
currentState = stateStack.Peek();
}
else // End of the line, pal
{
currentState = null;
}
// Assign the shortcut to the current enumerator
currentEnumerator = currentState?.Enumerator;
}
/// <summary>
/// Adds the current result as a new enumeration state.<para/>
/// Switches to this state if the curren search is just subdirectories only.
/// </summary>
private void AddState()
{
var newState = new EnumerationInfoState(currentEnumerator.Current.FullName, search);
stateList.Insert(stateIndex + ++currentState.SubdirCount, newState);
}
/// <summary>Enqueues the current result as a new enumeration state.</summary>
private void EnqueueState()
{
var newState = new EnumerationInfoState(currentEnumerator.Current.FullName, search);
stateQueue.Enqueue(newState);
}