218 lines
6.3 KiB
C
218 lines
6.3 KiB
C
/****************************************************************************
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* apps/graphics/pdcurses/pdc_touch.c
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* Public Domain Curses
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* RCSID("$Id: touch.c,v 1.29 2008/07/13 16:08:18 wmcbrine Exp $")
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*
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* Copyright (C) 2017 Gregory Nutt. All rights reserved.
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* Adapted by: Gregory Nutt <gnutt@nuttx.org>
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*
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* Adapted from the original public domain pdcurses by Gregory Nutt and
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* released as part of NuttX under the 3-clause BSD license:
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/* Name: touch
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*
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* Synopsis:
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* int touchwin(WINDOW *win);
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* int touchline(WINDOW *win, int start, int count);
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* int untouchwin(WINDOW *win);
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* int wtouchln(WINDOW *win, int y, int n, int changed);
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* bool is_linetouched(WINDOW *win, int line);
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* bool is_wintouched(WINDOW *win);
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*
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* Description:
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* touchwin() and touchline() throw away all information about
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* which parts of the window have been touched, pretending that the
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* entire window has been drawn on. This is sometimes necessary
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* when using overlapping windows, since a change to one window
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* will affect the other window, but the records of which lines
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* have been changed in the other window will not reflect the
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* change.
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*
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* untouchwin() marks all lines in the window as unchanged since
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* the last call to wrefresh().
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*
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* wtouchln() makes n lines in the window, starting at line y, look
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* as if they have (changed == 1) or have not (changed == 0) been
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* changed since the last call to wrefresh().
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*
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* is_linetouched() returns true if the specified line in the
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* specified window has been changed since the last call to
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* wrefresh().
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*
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* is_wintouched() returns true if the specified window
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* has been changed since the last call to wrefresh().
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*
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* Return Value:
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* All functions return OK on success and ERR on error except
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* is_wintouched() and is_linetouched().
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*
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* Portability X/Open BSD SYS V
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* touchwin Y Y Y
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* touchline Y - 3.0
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* untouchwin Y - 4.0
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* wtouchln Y Y Y
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* is_linetouched Y - 4.0
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* is_wintouched Y - 4.0
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*/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include "curspriv.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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int touchwin(WINDOW *win)
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{
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int i;
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PDC_LOG(("touchwin() - called: Win=%x\n", win));
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if (!win)
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{
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return ERR;
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}
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for (i = 0; i < win->_maxy; i++)
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{
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win->_firstch[i] = 0;
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win->_lastch[i] = win->_maxx - 1;
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}
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return OK;
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}
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int touchline(WINDOW *win, int start, int count)
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{
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int i;
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PDC_LOG(("touchline() - called: win=%p start %d count %d\n",
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win, start, count));
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if (!win || start > win->_maxy || start + count > win->_maxy)
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{
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return ERR;
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}
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for (i = start; i < start + count; i++)
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{
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win->_firstch[i] = 0;
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win->_lastch[i] = win->_maxx - 1;
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}
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return OK;
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}
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int untouchwin(WINDOW *win)
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{
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int i;
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PDC_LOG(("untouchwin() - called: win=%p", win));
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if (!win)
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{
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return ERR;
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}
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for (i = 0; i < win->_maxy; i++)
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{
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win->_firstch[i] = _NO_CHANGE;
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win->_lastch[i] = _NO_CHANGE;
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}
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return OK;
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}
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int wtouchln(WINDOW *win, int y, int n, int changed)
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{
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int i;
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PDC_LOG(("wtouchln() - called: win=%p y=%d n=%d changed=%d\n",
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win, y, n, changed));
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if (!win || y > win->_maxy || y + n > win->_maxy)
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{
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return ERR;
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}
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for (i = y; i < y + n; i++)
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{
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if (changed)
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{
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win->_firstch[i] = 0;
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win->_lastch[i] = win->_maxx - 1;
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}
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else
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{
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win->_firstch[i] = _NO_CHANGE;
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win->_lastch[i] = _NO_CHANGE;
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}
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}
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return OK;
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}
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bool is_linetouched(WINDOW *win, int line)
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{
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PDC_LOG(("is_linetouched() - called: win=%p line=%d\n", win, line));
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if (!win || line > win->_maxy || line < 0)
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{
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return false;
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}
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return (win->_firstch[line] != _NO_CHANGE) ? true : false;
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}
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bool is_wintouched(WINDOW *win)
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{
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int i;
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PDC_LOG(("is_wintouched() - called: win=%p\n", win));
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if (win)
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{
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for (i = 0; i < win->_maxy; i++)
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{
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if (win->_firstch[i] != _NO_CHANGE)
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{
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return true;
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}
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}
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}
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return false;
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}
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