/// <summary>
/// Creates a touch of a single method, and a list of calls in the order they should be called.
/// </summary>
/// <param name="method">The method of the touch.</param>
/// <param name="calls">The calls in the order they should be called.</param>
public Touch(Method method, Call [] calls)
{
BasicCall [] basic_calls = new BasicCall [calls.Length];
for (int i = 0; i < calls.Length; i++)
{
basic_calls [i] = new BasicCall(calls [i], new Touch.CallLocationList());
}
this.basic_calls = basic_calls;
start_method = method;
}
// Functions
/// <summary>
/// Generates all the changes in the touch (could be computationally intensive). Called once when <see cref="TouchBase.changes"/> is accessed.
/// </summary>
public override Change[] ComputeChanges()
{
List <Change> changes = new List <Change> ();
int method_call_length = method_calls == null ? 1 : method_calls.Length;
int basic_call_length = basic_calls == null ? 1 : basic_calls.Length;
int max_lead_length = method_calls == null ?
start_method.lead_length :
Math.Max(start_method.lead_length, method_calls.Select(x => x.method.lead_length).Max());
List <Change> [] change_states = new List <Change> [method_call_length * basic_call_length * max_lead_length];
for (int i = 0; i < change_states.Length; i++)
{
change_states [i] = new List <Change> ();
}
margin_calls = new Dictionary <int, char> ();
right_hand_calls = new Dictionary <int, string> ();
lead_head_line_indices = new List <int> ();
right_hand_calls.Add(-1, "Go " + start_method.title);
int lead_index = 0;
int sub_lead_index = 0;
int call_index = 0;
int method_call_index = 0;
int sub_splice_change_index = 0;
int sub_splice_lead_index = 0;
int attempted_calls_since_last_call = 0;
int attempted_splices_since_last_splice = 0;
int absolute_change_index = 0;
CallPoint current_callpoint = null;
Change current_change = Change.Rounds(stage);
Method current_method = start_method;
while (true)
{
#region Update calls
if (current_callpoint == null)
{
// Not in a call => Could be starting a call
if (basic_calls != null && basic_calls.Length > 0)
{
BasicCall basic_call = basic_calls [call_index];
Call call = basic_call.call;
if ((sub_lead_index - call.from + 1) % call.every == 0)
{
CallLocationParameters call_location_parameters = new CallLocationParameters(current_method, current_change, absolute_change_index, sub_lead_index, lead_index, attempted_calls_since_last_call, attempted_splices_since_last_splice, this);
if (basic_call.call_location.EvaluateBasicCall(call, call_location_parameters))
{
current_callpoint = new CallPoint(call, absolute_change_index);
attempted_calls_since_last_call = 0;
if (!call.is_plain)
{
margin_calls.Add(absolute_change_index, call.preferred_notation);
}
}
else
{
attempted_calls_since_last_call += 1;
}
}
}
}
else
{
// In a call, so could be stopping a call
if (absolute_change_index > current_callpoint.end_index)
{
sub_lead_index += current_callpoint.call.cover;
if (sub_lead_index >= current_method.place_notations.Length)
{
lead_head_line_indices.Add(absolute_change_index - 1);
sub_lead_index = 0;
lead_index += 1;
}
call_index += 1;
if (call_index >= basic_calls.Length)
{
call_index = 0;
}
current_callpoint = null;
}
}
#endregion
#region Update change (transposition)
PlaceNotation notation;
if (current_callpoint == null)
{
notation = current_method.place_notations [sub_lead_index];
}
else
{
notation = current_callpoint.GetNotationAtIndex(absolute_change_index);
if (notation == null)
{
notation = current_method.place_notations [sub_lead_index + absolute_change_index - current_callpoint.start_index];
}
}
current_change = current_change.Transpose(notation);
// Add change to list
changes.Add(current_change);
#endregion
#region Update method splicing calls
if (method_calls != null && method_calls.Length > 0)
{
MethodCall current_method_call = method_calls [method_call_index];
if (sub_lead_index == current_method.lead_length + current_method_call.splice_start_index - 1)
{
CallLocationParameters parameters = new CallLocationParameters(current_method, current_change, absolute_change_index, sub_lead_index, lead_index, attempted_calls_since_last_call, attempted_splices_since_last_splice, this);
if (current_method_call.location.EvaluateMethodCall(current_method_call, parameters))
{
current_method = current_method_call.method;
method_call_index += 1;
sub_lead_index = current_method_call.splice_end_index - 1; // Set to splice_end_index - 1, because later in this iteration of the while loop, 1 will be added to it, to get splice_end_index.
// Make sure that lead ends get counted even if there was a splice over the lead end.
if (current_method_call.splice_end_index == 0)
{
sub_lead_index = current_method.lead_length - 1;
}
sub_splice_change_index = 0;
sub_splice_lead_index = 0;
attempted_splices_since_last_splice = 0;
right_hand_calls.Add(absolute_change_index, current_method.title);
if (method_call_index >= method_calls.Length)
{
method_call_index = 0;
}
}
else
{
attempted_splices_since_last_splice += 1;
}
}
}
#endregion
#region Stop if it comes to rounds (to whatever is the target change is)
if (current_change == target_change)
{
// Add a final lead end.
int lead_index_to_check = sub_lead_index + 1;
if (current_callpoint != null && absolute_change_index == current_callpoint.end_index)
{
lead_index_to_check = sub_lead_index + current_callpoint.call.cover;
}
// Quickly check whether or not this is valid
bool is_valid = true;
if (rounds_checks == RoundsCheckLocations.AnyBackstroke && Utils.Mod(changes.Count, 2) == 1)
{
is_valid = false;
}
if (rounds_checks == RoundsCheckLocations.OnlyLeadEnds && lead_index_to_check != current_method.lead_length)
{
is_valid = false;
}
if (is_valid)
{
if (lead_index_to_check == current_method.lead_length)
{
lead_head_line_indices.Add(absolute_change_index);
}
comes_round = true;
break;
}
}
#endregion
#region Update indices & lead ends.
if (current_callpoint == null)
{
sub_lead_index += 1;
if (sub_lead_index >= current_method.place_notations.Length)
{
lead_head_line_indices.Add(absolute_change_index);
sub_lead_index = 0;
sub_splice_lead_index += 1;
lead_index += 1;
}
}
absolute_change_index += 1;
sub_splice_change_index += 1;
#endregion
#region Stop if touch goes on forever. If 100,000,000 changes are reached, then the code will stop.
List <Change> change_state_list = change_states [call_index + basic_call_length * (method_call_index + method_call_length * sub_lead_index)];
if (change_state_list.Contains(current_change))
{
comes_round = false;
break;
}
change_state_list.Add(current_change);
// It should never get this far
if (absolute_change_index > 1e4)
{
throw new YourPealRingersDiedOfExhaustionException("Broke the laws of human endurance and got to 100,000,000 changes without coming round.");
}
#endregion
}
return(changes.ToArray());
}
