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/* -*-      Mode:C++ -*- */

 * blob.hh
 * Copyright (C) 1999-2000 by John Heidemann
 * $Id: blob.hh,v 1.34 2004/12/16 05:12:32 johnh Exp $
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * 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, write to the Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.

 * Blob provides the virtual rendering of blobs on a X_MAX x Y_MAX
 * area.  See scaled_blob to add mapping to screen coordinates and 
 * lozenging.

#ifndef lavaps_blob_h
#define lavaps_blob_h

#include "config.h"

#include <string>
#include <list>

class process_view;

class blob {
      blob(const blob& tb);
      blob& operator=(const blob& tb);

      enum { X_MAX = 100, Y_MAX = 200, BASE_EXTENSION = 25, INITIAL_SLOP = 10 };

      process_view *pv_;

      // blob characteristics.
      int dark_percentage_;
      int dark_offset_;

      double H_, S_, B_,
            dk_H_, dk_S_, dk_B_;
      int size_;  // size in "screen linear units"
      // set from process_view

      static bool next_right_tending_;
            // When rendering blobs with only one column,
            // you may need to fake a 3rd point.
            // It's either right or left per blob,
            // and they're about 50% one way or the other.
      bool right_tending_;

      static const int x_step_ = INITIAL_SLOP;
      int x_;
      int *y_lows_, *y_highs_;
      int num_;
      int alloced_num_;

      int sign_;  // travel direction
      int reached_limit_;

      typedef list<blob*> blob_queue_t;
      static blob_queue_t all_queue_;
      blob_queue_t::iterator all_place_;

      static blob_queue_t redraw_queue_;
      blob_queue_t::iterator redraw_place_;
      void schedule_redraw() { if (redraw_place_ != redraw_queue_.end()) return; redraw_queue_.push_front(this); redraw_place_ = redraw_queue_.begin(); }
      static void flush_drawings();
      friend class redraw_all_f;
      static void redraw_all();

      virtual void redraw() = 0;

      void resize_int_array(int **iap, int on, int nn);
      void adjust_num(int new_num);
      inline bool valid_num(int n) { return n >= 0 && n < num_; }

      static const int DELTA_LIMIT;
      enum blob_op { MOVE_OP, GROW_OP, SHRINK_OP };

      blob *superior();

      // note: deltas must be > 0, use SHRINK/GROW to show sign
      int partial_op(blob_op op, int delta);
      virtual void op(blob_op op, int delta);

      void shift_to_right();
      void shift_to_left(int start);
      void widen_on_right();
      void widen_on_left();
      bool narrow_on_right();
      bool narrow_in_middle(int where);
      bool narrow_on_left();

      int advance_rank(blob_op op, int num, int magnitude, int direction);
      int find_rank_midpoint(int num);
      int ranks_overlap(int a, int b);

      void reverse_direction();

      blob(process_view *pv);
      virtual ~blob();

      static const int available_area() { return Y_MAX * X_MAX / x_step_; };

      static blob *create_real_blob(process_view *pv); // instantiate a back-end blob

      void move(int delta) { op(MOVE_OP, delta); };
      void print();
      void validate_rank(int rank, bool strict_less);
      void validate();

      virtual void set_hsb(double h, double s, double b);
      virtual void set_size(int size);   // only guaranteed to get "close"
      virtual void set_position(int x, int y);
      virtual void set_dark_percentage(int pct, int offset = -1);
      void reordered() { schedule_redraw(); };

      int calc_real_size();
      void info_to_string(string &s);

      int get_real_size() { return size_; }

      // the following should be virtual but can't because they're static
      static void init(int argc, char **argv);
      static void mainloop();
      static void splash(const char *msg);
      static void size_divisor_commit();
      static void size_mem_to_screen_commit() {};

#endif /* lavaps_blob_h */

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