/**************************************************************************** * Copyright (c) 1998-2002,2003 Free Software Foundation, Inc.              * *                                                                          * * Permission is hereby granted, free of charge, to any person obtaining a  * * copy of this software and associated documentation files (the            * * "Software"), to deal in the Software without restriction, including      * * without limitation the rights to use, copy, modify, merge, publish,      * * distribute, distribute with modifications, sublicense, and/or sell       * * copies of the Software, and to permit persons to whom the Software is    * * furnished to do so, subject to the following conditions:                 * *                                                                          * * The above copyright notice and this permission notice shall be included  * * in all copies or substantial portions of the Software.                   * *                                                                          * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  * * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               * * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   * * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   * * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    * * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    * * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               * *                                                                          * * Except as contained in this notice, the name(s) of the above copyright   * * holders shall not be used in advertising or otherwise to promote the     * * sale, use or other dealings in this Software without prior written       * * authorization.                                                           * ****************************************************************************//**************************************************************************** *   Author:  Juergen Pfeifer, 1995,1997                                    * ****************************************************************************/#include "form.priv.h"MODULE_ID("$Id: frm_data.c,v 1.10 2003/11/08 20:38:14 tom Exp $")/*---------------------------------------------------------------------------|   Facility      :  libnform  |   Function      :  bool data_behind(const FORM *form)|   |   Description   :  Check for off-screen data behind. This is nearly trivial|                    because the beginning of a field is fixed.||   Return Values :  TRUE   - there are off-screen data behind|                    FALSE  - there are no off-screen data behind+--------------------------------------------------------------------------*/NCURSES_EXPORT(bool)data_behind (const FORM *form){  bool result = FALSE;  if (form && (form->status & _POSTED) && form->current)    {      FIELD *field;      field = form->current;      if (!Single_Line_Field(field))	{	  result = (form->toprow==0) ? FALSE : TRUE;	}      else	{	  result = (form->begincol==0) ? FALSE : TRUE;	}    }  return(result);}/*---------------------------------------------------------------------------|   Facility      :  libnform  |   Function      :  static char * After_Last_Non_Pad_Position(|                                    char *buffer,|                                    int len,|                                    int pad)|   |   Description   :  Find the last position in the buffer that doesn't|                    contain a padding character.||   Return Values :  The pointer to this position +--------------------------------------------------------------------------*/INLINE static char * After_Last_Non_Pad_Position(char *buffer, int len, int pad){  char *end = buffer + len;  assert(buffer && len>=0);  while ( (buffer < end) && (*(end-1)==pad) )    end--;  return end;}#define SMALL_BUFFER_SIZE (80)/*---------------------------------------------------------------------------|   Facility      :  libnform  |   Function      :  bool data_ahead(const FORM *form)|   |   Description   :  Check for off-screen data ahead. This is more difficult|                    because a dynamic field has a variable end. ||   Return Values :  TRUE   - there are off-screen data ahead|                    FALSE  - there are no off-screen data ahead+--------------------------------------------------------------------------*/NCURSES_EXPORT(bool)data_ahead (const FORM *form){  bool result = FALSE;  if (form && (form->status & _POSTED) && form->current)    {      static char buffer[SMALL_BUFFER_SIZE + 1];      FIELD *field;      bool large_buffer;      bool cursor_moved = FALSE;      char *bp;      char *found_content;      int pos;      field = form->current;      assert(form->w);      large_buffer = (field->cols > SMALL_BUFFER_SIZE);      if (large_buffer)	bp = (char *)malloc((size_t)(field->cols) + 1);      else	bp = buffer;      assert(bp);            if (Single_Line_Field(field))	{	  int check_len;	  pos = form->begincol + field->cols;	  while (pos < field->dcols)	    {	      check_len = field->dcols - pos;	      if ( check_len >= field->cols )		check_len = field->cols;	      cursor_moved = TRUE;	      wmove(form->w,0,pos);	      winnstr(form->w,bp,check_len);	      found_content = 		After_Last_Non_Pad_Position(bp,check_len,field->pad);	      if (found_content==bp)		  pos += field->cols;		  	      else		{		  result = TRUE;		  break;		}	    }	}      else	{	  pos = form->toprow + field->rows;	  while (pos < field->drows)	    {	      cursor_moved = TRUE;	      wmove(form->w,pos,0);	      pos++;	      winnstr(form->w,bp,field->cols);	      found_content = 		After_Last_Non_Pad_Position(bp,field->cols,field->pad);	      if (found_content!=bp)		{		  result = TRUE;		  break;		}	    }	}      if (large_buffer)	free(bp);      if (cursor_moved)	wmove(form->w,form->currow,form->curcol);    }  return(result);}/* frm_data.c ends here */