/***********************************************************************/
/* COLUMN.C - Column commands                                          */
/* This file contains all commands that can be assigned to function    */
/* keys or typed on the command line.                                  */
/***********************************************************************/
/*
 * THE - The Hessling Editor. A text editor similar to VM/CMS xedit.
 * Copyright (C) 1991-2001 Mark Hessling
 *
 * 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 2 of
 * the License, or 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, write to:
 *
 *    The Free Software Foundation, Inc.
 *    675 Mass Ave,
 *    Cambridge, MA 02139 USA.
 *
 *
 * If you make modifications to this software that you feel increases
 * it usefulness for the rest of the community, please email the
 * changes, enhancements, bug fixes as well as any and all ideas to me.
 * This software is going to be maintained and enhanced as deemed
 * necessary by the community.
 *
 * Mark Hessling,  M.Hessling@qut.edu.au  http://www.lightlink.com/hessling/
 */

static char RCSid[] = "$Id: column.c,v 1.4 2005/06/19 00:35:52 mark Exp $";

#include <the.h>
#include <proto.h>

/***********************************************************************/
#ifdef HAVE_PROTO
short column_command(CHARTYPE *cmd_text,int cmd_type)
#else
short column_command(cmd_text,cmd_type)
CHARTYPE *cmd_text;
int cmd_type;
#endif
/***********************************************************************/
{
   LENGTHTYPE i=0;
   LINETYPE true_line=0L;
   short rc=RC_OK;
   LENGTHTYPE len_params=0;
   unsigned short y=0,x=0;

   TRACE_FUNCTION("column.c:  column_command");
   /*
    * All column commands under XEDIT compatibility refer to current line.
    * ******* At this stage, revert to THE behaviour at all times *******
    */
   if (compatible_feel == COMPAT_XEDIT)
      true_line = CURRENT_VIEW->current_line;
   else
      true_line = get_true_line(TRUE);
   /*
    * If on TOF or BOF, exit with error.
    */
   if (TOF(true_line)
   ||  BOF(true_line))
   {
      display_error(36,(CHARTYPE *)"",FALSE);
      TRACE_RETURN();
      return(RC_NO_LINES_CHANGED);
   }
   /*
    * If HEX mode is on, convert the hex string...
    */
   if (CURRENT_VIEW->hex)
   {
      if ((len_params = convert_hex_strings(cmd_text)) == (-1))
      {
         display_error(32,(CHARTYPE *)"",FALSE);
         TRACE_RETURN();
         return(RC_INVALID_OPERAND);
      }
   }
   else
     len_params = strlen((DEFCHAR *)cmd_text);
   /*
    * If on command line, copy current line into rec
    */
   if (CURRENT_VIEW->current_window == WINDOW_COMMAND
   ||  compatible_feel == COMPAT_XEDIT)
   {
      post_process_line(CURRENT_VIEW,CURRENT_VIEW->focus_line,(LINE *)NULL,TRUE);
      pre_process_line(CURRENT_VIEW,CURRENT_VIEW->current_line,(LINE *)NULL);
      x = CURRENT_VIEW->current_column-1;
   }
   else
   {
      if (CURRENT_VIEW->current_window == WINDOW_PREFIX)
      {
         if (cmd_type != COLUMN_CAPPEND)
         {
            display_error(36,(CHARTYPE *)"",FALSE);
            TRACE_RETURN();
            return(RC_NO_LINES_CHANGED);
         }
      }
      if (curses_started)
         getyx(CURRENT_WINDOW,y,x);
      x = CURRENT_VIEW->verify_col-1+x;
   }
   switch(cmd_type)
   {
      case COLUMN_CAPPEND:
         CURRENT_VIEW->current_column = rec_len+1;
         for (i=0;i<len_params;i++)
         {
            if (rec_len > max_line_length)
               break;
            rec[rec_len] = *(cmd_text+i);
            rec_len++;
         }
         break;
      case COLUMN_CINSERT:
         if (x > rec_len)
         {
            rec_len = x;
            for (i=0;i<len_params;i++)
            {
               if (rec_len > max_line_length)
                  break;
               rec[rec_len] = *(cmd_text+i);
               rec_len++;
            }
         }
         else
         {
            rec = meminsmem(rec,cmd_text,len_params,x,max_line_length,rec_len);
            rec_len = min(max_line_length,rec_len+len_params);
         }
         break;
      case COLUMN_COVERLAY:
         for (i=0;i<len_params;i++)
         {
            if (x > max_line_length)
               break;
            switch(*(cmd_text+i))
            {
               case '_':
                  rec[x] = ' ';
                  break;
               case ' ':
                   break;
               default:
                  rec[x] = *(cmd_text+i);
                  break;
            }
            x++;
         }
         rec_len = max(rec_len,x+1);
         break;
      case COLUMN_CREPLACE:
         for (i=0;i<len_params;i++)
         {
            if (x > max_line_length)
               break;
            rec[x] = *(cmd_text+i);
            x++;
         }
         rec_len = max(rec_len,x+1);
         break;
   }
   if (CURRENT_VIEW->current_window == WINDOW_COMMAND
   ||  compatible_feel == COMPAT_XEDIT)
   {
      post_process_line(CURRENT_VIEW,CURRENT_VIEW->current_line,(LINE *)NULL,TRUE);
      pre_process_line(CURRENT_VIEW,CURRENT_VIEW->focus_line,(LINE *)NULL);
   }
   else
   {
      switch(cmd_type)
      {
         case COLUMN_CAPPEND:
            if (CURRENT_VIEW->current_window == WINDOW_PREFIX)
            {
               CURRENT_VIEW->current_window = WINDOW_FILEAREA;
               if (curses_started)
                  wmove(CURRENT_WINDOW,y,0);
            }
            rc = execute_move_cursor(CURRENT_VIEW->current_column-1);
            break;
         case COLUMN_CINSERT:
            break;
      }
   }
   build_screen(current_screen);
   display_screen(current_screen);
   TRACE_RETURN();
   return(rc);
}