/**
 * @file align_stack.h
 * Manages a align stack, which is just a pair of chunk stacks with a few
 * fancy functions.
 *
 * @author  Ben Gardner
 * @license GPL v2+
 *
 * $Id: align_stack.h 893 2007-08-29 20:43:15Z bengardner $
 */

#include "ChunkStack.h"

class AlignStack
{
public:
   enum StarStyle
   {
      SS_IGNORE,  // don't look for prev stars
      SS_INCLUDE, // include prev * before add
      SS_DANGLE   // include prev * after add
   };

   ChunkStack m_aligned;
   ChunkStack m_skipped;
   ChunkStack m_scratch;
   int        m_max_col;
   int        m_min_col;
   int        m_span;
   int        m_thresh;
   int        m_seqnum;
   int        m_nl_seqnum;
   int        m_gap;
   bool       m_right_align;
   StarStyle  m_star_style;
   StarStyle  m_amp_style;


   AlignStack()
   {
   }
   ~AlignStack()
   {
   }

   void Start(int span, int threshold = 0);
   void Add(chunk_t *pc, int seqnum = 0);
   void AddTrailer(chunk_t *pc);
   void NewLines(int cnt);
   void Flush();
   void End();

protected:
   int m_last_added; /* 0=none, 1=aligned, 2=skipped */
   void ReAddSkipped();
};