#ifndef _MinGapBetweenSubtitles_h
#define _MinGapBetweenSubtitles_h

/*
 *	subtitleeditor -- a tool to create or edit subtitle
 *
 *	http://home.gna.org/subtitleeditor/
 *	https://gna.org/projects/subtitleeditor/
 *
 *	Copyright @ 2005-2009, kitone
 *
 *	This program is free software; you can redistribute it and/or modify
 *	it under the terms of the GNU General Public License as published by
 *	the Free Software Foundation; either version 3 of the License, or
 *	(at your option) any later version.
 *
 *	This program 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 General Public License for more details.
 *
 *	You should have received a copy of the GNU General Public License
 *	along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#include "errorchecking.h"

/*
 *
 */
class MinGapBetweenSubtitles : public ErrorChecking
{
public:

	MinGapBetweenSubtitles()
	:ErrorChecking(
			"min-gap-between-subtitles",
			_("Minimum Gap Between Subtitles"),
			_("Detects and fixes subtitles when the minimum gap between subtitles is too short."))
	{
		m_minGBS = 100;
	}
	
	/*
	 *
	 */
	virtual void init()
	{
		m_minGBS = Config::getInstance().get_value_int("timing", "min-gap-between-subtitles");
	}

	/*
	 *
	 */
	bool execute(Info &info)
	{
		if(!info.nextSub)
			return false;

		long gap = (info.nextSub.get_start() - info.currentSub.get_end()).totalmsecs;

		if(gap >= m_minGBS)
			return false;

		long middle = info.currentSub.get_end().totalmsecs + (gap / 2);
		long halfGBS = m_minGBS / 2;

		SubtitleTime new_current(middle - halfGBS);
		SubtitleTime new_next(middle + halfGBS);
		
		if(info.tryToFix)
		{
			info.currentSub.set_end(new_current);
			info.nextSub.set_start(new_next);

			return true;
		}
		
		// only error & solution
		info.error=	build_message(_(
				"Too short gap between subtitle: <b>%ims</b>"), 
				gap);

		info.solution = build_message(
				_("<b>Automatic correction:</b> to clip current subtitle end to %s and to move next subtitle start to %s."),
				new_current.str().c_str(), new_next.str().c_str());

		return true;
	}

protected:
	int m_minGBS;
};

#endif//_MinGapBetweenSubtitles_h
