154 lines
4.5 KiB
C
154 lines
4.5 KiB
C
/****************************************************************************
|
|
* apps/graphics/pdcurses/pdc_scroll.c
|
|
* Public Domain Curses
|
|
* RCSID("$Id: scroll.c,v 1.36 2008/07/13 16:08:18 wmcbrine Exp $")
|
|
*
|
|
* Copyright (C) 2017 Gregory Nutt. All rights reserved.
|
|
* Adapted by: Gregory Nutt <gnutt@nuttx.org>
|
|
*
|
|
* Adapted from the original public domain pdcurses by Gregory Nutt and
|
|
* released as part of NuttX under the 3-clause BSD license:
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
* 3. Neither the name NuttX nor the names of its contributors may be
|
|
* used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
|
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/* Name: scroll
|
|
*
|
|
* Synopsis:
|
|
* int scroll(WINDOW *win);
|
|
* int scrl(int n);
|
|
* int wscrl(WINDOW *win, int n);
|
|
*
|
|
* Description:
|
|
* scroll() causes the window to scroll up one line. This involves
|
|
* moving the lines in the window data strcture.
|
|
*
|
|
* With a positive n, scrl() and wscrl() scroll the window up n
|
|
* lines (line i + n becomes i); otherwise they scroll the window
|
|
* down n lines.
|
|
|
|
* For these functions to work, scrolling must be enabled via
|
|
* scrollok(). Note also that scrolling is not allowed if the
|
|
* supplied window is a pad.
|
|
*
|
|
* Return Value:
|
|
* All functions return OK on success and ERR on error.
|
|
*
|
|
* Portability X/Open BSD SYS V
|
|
* scroll Y Y Y
|
|
* scrl Y - 4.0
|
|
* wscrl Y - 4.0
|
|
*/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include "curspriv.h"
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
int wscrl(WINDOW *win, int n)
|
|
{
|
|
chtype blank;
|
|
chtype *temp;
|
|
int dir;
|
|
int start;
|
|
int end;
|
|
int l;
|
|
int i;
|
|
|
|
/* Check if window scrolls. Valid for window AND pad */
|
|
|
|
if (!win || !win->_scroll || !n)
|
|
{
|
|
return ERR;
|
|
}
|
|
|
|
blank = win->_bkgd;
|
|
|
|
if (n > 0)
|
|
{
|
|
start = win->_tmarg;
|
|
end = win->_bmarg;
|
|
dir = 1;
|
|
}
|
|
else
|
|
{
|
|
start = win->_bmarg;
|
|
end = win->_tmarg;
|
|
dir = -1;
|
|
}
|
|
|
|
for (l = 0; l < (n * dir); l++)
|
|
{
|
|
temp = win->_y[start];
|
|
|
|
/* Re-arrange line pointers */
|
|
|
|
for (i = start; i != end; i += dir)
|
|
{
|
|
win->_y[i] = win->_y[i + dir];
|
|
}
|
|
|
|
win->_y[end] = temp;
|
|
|
|
/* Make a blank line */
|
|
|
|
for (i = 0; i < win->_maxx; i++)
|
|
{
|
|
*temp++ = blank;
|
|
}
|
|
}
|
|
|
|
touchline(win, win->_tmarg, win->_bmarg - win->_tmarg + 1);
|
|
|
|
PDC_sync(win);
|
|
return OK;
|
|
}
|
|
|
|
int scrl(int n)
|
|
{
|
|
#ifdef CONFIG_PDCURSES_MULTITHREAD
|
|
FAR struct pdc_context_s *ctx = PDC_ctx();
|
|
#endif
|
|
PDC_LOG(("scrl() - called\n"));
|
|
|
|
return wscrl(stdscr, n);
|
|
}
|
|
|
|
int scroll(WINDOW *win)
|
|
{
|
|
PDC_LOG(("scroll() - called\n"));
|
|
|
|
return wscrl(win, 1);
|
|
}
|