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/****************************************************************************
* Copyright (c) 1998-2004,2005 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 1.14 2005/11/26 15:34:01 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;
T((T_CALLED("data_behind(%p)"), form));
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;
}
}
returnBool(result);
}
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : static char * Only_Padding(
| WINDOW *w,
| int len,
| int pad)
|
| Description : Test if 'length' cells starting at the current position
| contain a padding character.
|
| Return Values : true if only padding cells are found
+--------------------------------------------------------------------------*/
NCURSES_INLINE static bool
Only_Padding(WINDOW *w, int len, int pad)
{
bool result = TRUE;
int y, x, j;
FIELD_CELL cell;
getyx(w, y, x);
for (j = 0; j < len; ++j)
{
if (wmove(w, y, x + j) != ERR)
{
#if USE_WIDEC_SUPPORT
if (win_wch(w, &cell) != ERR)
{
if ((chtype)CharOf(cell) != ChCharOf(pad)
|| cell.chars[1] != 0)
{
result = FALSE;
break;
}
}
#else
cell = winch(w);
if (ChCharOf(cell) != ChCharOf(pad))
{
result = FALSE;
break;
}
#endif
}
else
{
/* if an error, return true: no non-padding text found */
break;
}
}
/* no need to reset the cursor position; caller does this */
return result;
}
/*---------------------------------------------------------------------------
| 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;
T((T_CALLED("data_ahead(%p)"), form));
if (form && (form->status & _POSTED) && form->current)
{
FIELD *field;
bool cursor_moved = FALSE;
int pos;
field = form->current;
assert(form->w);
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);
if (Only_Padding(form->w, check_len, field->pad))
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++;
if (!Only_Padding(form->w, field->cols, field->pad))
{
result = TRUE;
break;
}
}
}
if (cursor_moved)
wmove(form->w, form->currow, form->curcol);
}
returnBool(result);
}
/* frm_data.c ends here */
|
