#include "tools.h"

#include <math.h>


namespace LtsScriptTimeline
{






int Tools::getLength(int startTime, int duration)
{
  return  (getPos(startTime + duration) - getPos(startTime));
}


int Tools::getDuration(int duration) 
{
  double max = Tools::m_timelineLength;
  max /= Tools::m_zoomFactor;

  int paintWidth = m_paintWidth; 

  double x = duration;  
  x /= paintWidth; 
  x *= max;       

  return lrint(x);
}


int Tools::getTime(int pos, bool neutral) 
{
  double visibleMax = Tools::m_timelineLength;
  visibleMax /= Tools::m_zoomFactor;

  if (!neutral)
    visibleMax += Tools::m_scrollPos;

  int visibleMin = 0;

  if (!neutral)
    visibleMin = Tools::m_scrollPos;

  double diff = visibleMax - visibleMin; 
  int paintWidth = m_paintWidth; 

  double x = pos;  
  x /= paintWidth; 
  x *= diff;       
  x += visibleMin; 

  return lrint(x);
}


int Tools::getPos(int time, bool neutral) 
{
  double visibleMax = Tools::m_timelineLength;
  visibleMax /= Tools::m_zoomFactor;

  if (!neutral)
    visibleMax += Tools::m_scrollPos;

  int visibleMin = 0;

  if (!neutral)
    visibleMin = Tools::m_scrollPos;

  double diff = visibleMax - visibleMin; 
  int paintWidth = m_paintWidth; 

  double x = time; 
  x -= visibleMin; 
  x /= diff;       
  x *= paintWidth; 

  return lrint(x);
}

}