/*
MD_Parola - Library for modular scrolling text and Effects
  
See header file for comments
  
Copyright (C) 2013 Marco Colli. All rights reserved.

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <MD_Parola.h>
#include <MD_Parola_lib.h>
/**
 * \file
 * \brief Implements grow effects
 */

void MD_PZone::effectGrow(bool bUp, bool bIn)
// Scan the message over with a new one
// Print up the whole message and then remove the parts we 
// don't need in order to do the animation.
{
	if (bIn)	// incoming
	{
		switch (_fsmState)
		{
		case INITIALISE:
			PRINT_STATE("I GROW");
			setInitialEffectConditions();
			_nextPos = (bUp ? 0xff : 1);		// this is the bit mask
			_fsmState = PUT_CHAR;
			// fall through to next state

		case GET_FIRST_CHAR:
		case GET_NEXT_CHAR:
		case PUT_CHAR:
		case PAUSE:
			PRINT_STATE("I GROW");

			commonPrint();
			// check if we have finished
			if (_nextPos == (bUp ? 0 : 0xff))	// all bits covered
			{
				_fsmState = PAUSE;
				break;
			}

			// blank out the part of the display we don't need
			FSMPRINT("Keep bits ", _nextPos);
			for (uint8_t i = _startPos; i != _endPos+_posOffset; i += _posOffset)
			{
				uint8_t	c = DATA_BAR(_MX->getColumn(i)) & (bUp ? ~_nextPos : _nextPos);

				_MX->setColumn(i, DATA_BAR(c));
			}

			// for the next time around
			if (bUp)
				_nextPos >>= 1;
			else
				_nextPos = (_nextPos << 1) | 1;
			break;

		default:
			PRINT_STATE("I GROW");
			_fsmState = PAUSE;
		}
	}
	else	// exiting
	{
		switch (_fsmState)
		{
		case PAUSE:
		case INITIALISE:
			PRINT_STATE("O GROW");
			setInitialEffectConditions();
			_nextPos = (bUp ? 1 : 0xff);		// this is the bit mask
			_fsmState = PUT_CHAR;
			// fall through to next state

		case GET_FIRST_CHAR:
		case GET_NEXT_CHAR:
		case PUT_CHAR:
			PRINT_STATE("O GROW");
			commonPrint();

			// blank out the part of the display we don't need
			FSMPRINT(" Keep bits ", _nextPos);
			for (uint8_t i=_startPos; i != _endPos+_posOffset; i += _posOffset)
			{
				uint8_t	c = DATA_BAR(_MX->getColumn(i)) & (bUp ? ~_nextPos : _nextPos);

				_MX->setColumn(i, DATA_BAR(c));
			}

			// check if we have finished
			if (_nextPos == (bUp ? 0xff : 0x0))	// all bits covered
				_fsmState = END;

			// for the next time around
			if (bUp)
				_nextPos = (_nextPos << 1) | 1;
			else
				_nextPos >>= 1;
			break;

		default:
			PRINT_STATE("O GROW");
			_fsmState = END;
			break;
		}
	}
}
