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/* $OpenBSD: frm_data.c,v 1.8 2015/01/23 22:48:51 krw Exp $ */ |
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/**************************************************************************** |
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* Copyright (c) 1998-2004,2005 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 1.8 2015/01/23 22:48:51 krw 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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| |
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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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| |
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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)"), 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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| |
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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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| |
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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 = 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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| |
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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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| |
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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)"), 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 */ |