182 lines
6.1 KiB
C
182 lines
6.1 KiB
C
/****************************************************************************
|
|
* 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("$Id$")
|
|
|
|
/*---------------------------------------------------------------------------
|
|
| 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 */
|