| /**************************************************************************** |
| * Copyright (c) 1998 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 <juergen.pfeifer@gmx.net> 1995,1997 * |
| ****************************************************************************/ |
| |
| #include "form.priv.h" |
| |
| MODULE_ID("$Id: frm_data.c,v 1.1.1.1 2012/03/29 17:21:09 uid42307 Exp $") |
| |
| extern int winnstr(WINDOW *, char *, int); |
| |
| /*--------------------------------------------------------------------------- |
| | Facility : libnform |
| | Function : bool data_behind(const FORM *form) |
| | |
| | Description : Check for off-screen data behind. This is nearly trivial |
| | becose the begin of a field is fixed. |
| | |
| | Return Values : TRUE - there are off-screen data behind |
| | FALSE - there are no off-screen data behind |
| +--------------------------------------------------------------------------*/ |
| 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 |
| +--------------------------------------------------------------------------*/ |
| 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 != 0); |
| |
| large_buffer = (field->cols > SMALL_BUFFER_SIZE); |
| if (large_buffer) |
| bp = (char *)malloc((size_t)(field->cols) + 1); |
| else |
| bp = buffer; |
| |
| assert(bp != 0); |
| |
| 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 */ |