194 lines
6.2 KiB
C
194 lines
6.2 KiB
C
/****************************************************************************
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* Copyright (c) 1998-2010,2013 Free Software Foundation, Inc. *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a *
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* copy of this software and associated documentation files (the *
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* "Software"), to deal in the Software without restriction, including *
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* without limitation the rights to use, copy, modify, merge, publish, *
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* distribute, distribute with modifications, sublicense, and/or sell *
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* copies of the Software, and to permit persons to whom the Software is *
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* furnished to do so, subject to the following conditions: *
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* *
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* The above copyright notice and this permission notice shall be included *
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* in all copies or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
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* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
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* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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* *
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* Except as contained in this notice, the name(s) of the above copyright *
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* holders shall not be used in advertising or otherwise to promote the *
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* sale, use or other dealings in this Software without prior written *
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* authorization. *
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****************************************************************************/
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/****************************************************************************
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* Author: Juergen Pfeifer, 1995,1997 *
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****************************************************************************/
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#include "form.priv.h"
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MODULE_ID("$Id: frm_data.c,v 1.16 2013/08/24 22:44:05 tom Exp $")
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/*---------------------------------------------------------------------------
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| Facility : libnform
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| Function : bool data_behind(const FORM *form)
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| Description : Check for off-screen data behind. This is nearly trivial
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| because the beginning of a field is fixed.
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| Return Values : TRUE - there are off-screen data behind
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| FALSE - there are no off-screen data behind
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+--------------------------------------------------------------------------*/
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NCURSES_EXPORT(bool)
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data_behind(const FORM *form)
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{
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bool result = FALSE;
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T((T_CALLED("data_behind(%p)"), (const void *)form));
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if (form && (form->status & _POSTED) && form->current)
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{
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FIELD *field;
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field = form->current;
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if (!Single_Line_Field(field))
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{
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result = (form->toprow == 0) ? FALSE : TRUE;
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}
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else
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{
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result = (form->begincol == 0) ? FALSE : TRUE;
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}
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}
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returnBool(result);
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}
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/*---------------------------------------------------------------------------
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| Facility : libnform
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| Function : static char * Only_Padding(
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| WINDOW *w,
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| int len,
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| int pad)
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| Description : Test if 'length' cells starting at the current position
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| contain a padding character.
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| Return Values : true if only padding cells are found
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+--------------------------------------------------------------------------*/
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NCURSES_INLINE static bool
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Only_Padding(WINDOW *w, int len, int pad)
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{
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bool result = TRUE;
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int y, x, j;
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FIELD_CELL cell;
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getyx(w, y, x);
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for (j = 0; j < len; ++j)
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{
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if (wmove(w, y, x + j) != ERR)
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{
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#if USE_WIDEC_SUPPORT
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if (win_wch(w, &cell) != ERR)
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{
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if ((chtype)CharOf(cell) != ChCharOf(pad)
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|| cell.chars[1] != 0)
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{
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result = FALSE;
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break;
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}
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}
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#else
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cell = (FIELD_CELL) winch(w);
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if (ChCharOf(cell) != ChCharOf(pad))
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{
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result = FALSE;
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break;
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}
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#endif
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}
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else
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{
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/* if an error, return true: no non-padding text found */
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break;
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}
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}
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/* no need to reset the cursor position; caller does this */
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return result;
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}
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/*---------------------------------------------------------------------------
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| Facility : libnform
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| Function : bool data_ahead(const FORM *form)
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| Description : Check for off-screen data ahead. This is more difficult
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| because a dynamic field has a variable end.
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| Return Values : TRUE - there are off-screen data ahead
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| FALSE - there are no off-screen data ahead
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+--------------------------------------------------------------------------*/
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NCURSES_EXPORT(bool)
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data_ahead(const FORM *form)
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{
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bool result = FALSE;
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T((T_CALLED("data_ahead(%p)"), (const void *)form));
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if (form && (form->status & _POSTED) && form->current)
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{
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FIELD *field;
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bool cursor_moved = FALSE;
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int pos;
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field = form->current;
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assert(form->w);
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if (Single_Line_Field(field))
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{
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int check_len;
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pos = form->begincol + field->cols;
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while (pos < field->dcols)
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{
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check_len = field->dcols - pos;
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if (check_len >= field->cols)
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check_len = field->cols;
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cursor_moved = TRUE;
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wmove(form->w, 0, pos);
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if (Only_Padding(form->w, check_len, field->pad))
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pos += field->cols;
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else
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{
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result = TRUE;
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break;
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}
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}
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}
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else
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{
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pos = form->toprow + field->rows;
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while (pos < field->drows)
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{
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cursor_moved = TRUE;
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wmove(form->w, pos, 0);
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pos++;
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if (!Only_Padding(form->w, field->cols, field->pad))
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{
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result = TRUE;
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break;
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}
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}
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}
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if (cursor_moved)
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wmove(form->w, form->currow, form->curcol);
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}
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returnBool(result);
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}
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/* frm_data.c ends here */
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