| /**************************************************************************** |
| * Copyright (c) 1998-2010,2013 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 * |
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| * 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 * |
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| * 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 1.16 2013/08/24 22:44:05 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)"), (const void *)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 = (FIELD_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)"), (const void *)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 */ |