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/* $NetBSD: touchwin.c,v 1.27 2013/12/06 11:23:47 blymn Exp $ */
/*
* Copyright (c) 1981, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* 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 of the University 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 REGENTS 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 REGENTS 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.
*/
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)touchwin.c 8.2 (Berkeley) 5/4/94";
#else
__RCSID("$NetBSD: touchwin.c,v 1.27 2013/12/06 11:23:47 blymn Exp $");
#endif
#endif /* not lint */
#include "curses.h"
#include "curses_private.h"
static int _cursesi_touchline_force(WINDOW *, int, int, int, int);
/*
* is_linetouched --
* Indicate if line has been touched or not.
*/
bool
is_linetouched(WINDOW *win, int line)
{
if (line > win->maxy)
return FALSE;
return ((win->alines[line]->flags & __ISDIRTY) != 0);
}
/*
* touchline --
* Touch count lines starting at start. This is the SUS v2 compliant
* version.
*/
int
touchline(WINDOW *win, int start, int count)
{
#ifdef DEBUG
__CTRACE(__CTRACE_LINE, "touchline: (%p, %d, %d)\n", win, start, count);
#endif
return wtouchln(win, start, count, 1);
}
/*
* wredrawln --
* Mark count lines starting at start as corrupted. Implemented using
* wtouchln().
*/
int wredrawln(WINDOW *win, int start, int count)
{
#ifdef DEBUG
__CTRACE(__CTRACE_LINE, "wredrawln: (%p, %d, %d)\n", win, start, count);
#endif
return wtouchln(win, start, count, 1);
}
/*
* is_wintouched --
* Check if the window has been touched.
*/
bool
is_wintouched(WINDOW *win)
{
int y, maxy;
maxy = win->maxy;
for (y = 0; y < maxy; y++) {
if (is_linetouched(win, y) == TRUE)
return TRUE;
}
return FALSE;
}
/*
* touchwin --
* Make it look like the whole window has been changed.
*/
int
touchwin(WINDOW *win)
{
#ifdef DEBUG
__CTRACE(__CTRACE_LINE, "touchwin: (%p)\n", win);
#endif
return wtouchln(win, 0, win->maxy, 1);
}
/*
* redrawwin --
* Mark entire window as corrupted. Implemented using wtouchln().
*/
int
redrawwin(WINDOW *win)
{
#ifdef DEBUG
__CTRACE(__CTRACE_LINE, "redrawwin: (%p)\n", win);
#endif
return wtouchln(win, 0, win->maxy, 1);
}
/*
* untouchwin --
* Make it look like the window has not been changed.
*/
int
untouchwin(WINDOW *win)
{
#ifdef DEBUG
__CTRACE(__CTRACE_LINE, "untouchwin: (%p)\n", win);
#endif
return wtouchln(win, 0, win->maxy, 0);
}
/*
* wtouchln --
* If changed is 1 then touch n lines starting at line. If changed
* is 0 then mark the lines as unchanged.
*/
int
wtouchln(WINDOW *win, int line, int n, int changed)
{
int y;
__LINE *wlp;
#ifdef DEBUG
__CTRACE(__CTRACE_LINE, "wtouchln: (%p) %d, %d, %d\n",
win, line, n, changed);
#endif
if (line + n > win->maxy)
line = win->maxy - n;
for (y = line; y < line + n; y++) {
if (changed == 1)
_cursesi_touchline_force(win, y, 0,
(int) win->maxx - 1, 1);
else {
wlp = win->alines[y];
if (*wlp->firstchp >= win->ch_off &&
*wlp->firstchp < win->maxx + win->ch_off)
*wlp->firstchp = win->maxx + win->ch_off;
if (*wlp->lastchp >= win->ch_off &&
*wlp->lastchp < win->maxx + win->ch_off)
*wlp->lastchp = win->ch_off;
wlp->flags &= ~(__ISDIRTY | __ISFORCED);
}
}
return OK;
}
int
__touchwin(WINDOW *win)
{
int y, maxy;
#ifdef DEBUG
__CTRACE(__CTRACE_LINE, "__touchwin: (%p)\n", win);
#endif
maxy = win->maxy;
for (y = 0; y < maxy; y++)
__touchline(win, y, 0, (int) win->maxx - 1);
return (OK);
}
int
__touchline(WINDOW *win, int y, int sx, int ex)
{
return (_cursesi_touchline_force(win, y, sx, ex, 0));
}
/*
* Touch line y on window win starting from column sx and ending at
* column ex. If force is 1 then we mark this line as a forced update
* which will bypass screen optimisation in the refresh code to rewrite
* this line unconditionally (even if refresh thinks the screen matches
* what is in the virtscr)
*/
static int
_cursesi_touchline_force(WINDOW *win, int y, int sx, int ex, int force)
{
#ifdef DEBUG
__CTRACE(__CTRACE_LINE, "__touchline: (%p, %d, %d, %d)\n",
win, y, sx, ex);
__CTRACE(__CTRACE_LINE, "__touchline: first = %d, last = %d\n",
*win->alines[y]->firstchp, *win->alines[y]->lastchp);
#endif
sx += win->ch_off;
ex += win->ch_off;
win->alines[y]->flags |= __ISDIRTY;
if (force == 1)
win->alines[y]->flags |= __ISFORCED;
/* firstchp/lastchp are shared between parent window and sub-window. */
if (*win->alines[y]->firstchp > sx)
*win->alines[y]->firstchp = sx;
if (*win->alines[y]->lastchp < ex)
*win->alines[y]->lastchp = ex;
#ifdef DEBUG
__CTRACE(__CTRACE_LINE, "__touchline: first = %d, last = %d\n",
*win->alines[y]->firstchp, *win->alines[y]->lastchp);
#endif
return (OK);
}
void
wsyncup(WINDOW *win)
{
do {
__touchwin(win);
win = win->orig;
} while (win);
}
void
wsyncdown(WINDOW *win)
{
WINDOW *w = win->orig;
while (w) {
if (is_wintouched(w)) {
__touchwin(win);
break;
}
w = w->orig;
}
}
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