OpenSolaris_b135/ucblib/libcurses/refresh.c
/*
* Copyright 2001 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*LINTLIBRARY*/
#ifndef lint
static char
sccsid[] = "@(#)refresh.c 1.8 89/08/24 SMI"; /* from UCB 5.1 85/06/07 */
#endif /* not lint */
/*
* make the current screen look like "win" over the area coverd by
* win.
*/
#include "curses.ext"
#include <term.h>
#include <string.h>
#ifdef DEBUG
#define DEBUGSTATIC
#else
#define DEBUGSTATIC static
#endif
DEBUGSTATIC short ly, lx;
DEBUGSTATIC bool curwin;
WINDOW *_win = NULL;
/* forward declarations */
DEBUGSTATIC void domvcur(int, int, int, int);
DEBUGSTATIC int makech(WINDOW *, short);
int
wrefresh(WINDOW *win)
{
short wy;
int retval;
/*
* make sure were in visual state
*/
if (_endwin) {
(void) _puts(VS);
(void) _puts(TI);
_endwin = FALSE;
}
/*
* initialize loop parameters
*/
ly = curscr->_cury;
lx = curscr->_curx;
_win = win;
curwin = (win == curscr);
if (win->_clear || curscr->_clear || curwin) {
if ((win->_flags & _FULLWIN) || curscr->_clear) {
(void) _puts(CL);
ly = 0;
lx = 0;
if (!curwin) {
curscr->_clear = FALSE;
curscr->_cury = 0;
curscr->_curx = 0;
(void) werase(curscr);
}
(void) touchwin(win);
}
win->_clear = FALSE;
}
if (!CA) {
if (win->_curx != 0)
(void) _putchar('\n');
if (!curwin)
(void) werase(curscr);
}
#ifdef DEBUG
fprintf(outf, "REFRESH(%0.2o): curwin = %d\n", win, curwin);
fprintf(outf, "REFRESH:\n\tfirstch\tlastch\n");
#endif
for (wy = 0; wy < win->_maxy; wy++) {
#ifdef DEBUG
fprintf(outf, "%d\t%d\t%d\n", wy, win->_firstch[wy],
win->_lastch[wy]);
#endif
if (win->_firstch[wy] != _NOCHANGE)
if (makech(win, wy) == ERR)
return (ERR);
else {
if (win->_firstch[wy] >= win->_ch_off)
win->_firstch[wy] = win->_maxx +
win->_ch_off;
if (win->_lastch[wy] < win->_maxx +
win->_ch_off)
win->_lastch[wy] = win->_ch_off;
if (win->_lastch[wy] < win->_firstch[wy])
win->_firstch[wy] = _NOCHANGE;
}
#ifdef DEBUG
fprintf(outf, "\t%d\t%d\n", win->_firstch[wy],
win->_lastch[wy]);
#endif
}
if (win == curscr)
domvcur(ly, lx, win->_cury, win->_curx);
else {
if (win->_leave) {
curscr->_cury = ly;
curscr->_curx = lx;
ly -= win->_begy;
lx -= win->_begx;
if (ly >= 0 && ly < win->_maxy && lx >= 0 &&
lx < win->_maxx) {
win->_cury = ly;
win->_curx = lx;
}
else
win->_cury = win->_curx = 0;
} else {
domvcur(ly, lx, win->_cury + win->_begy,
win->_curx + win->_begx);
curscr->_cury = win->_cury + win->_begy;
curscr->_curx = win->_curx + win->_begx;
}
}
retval = OK;
_win = NULL;
(void) fflush(stdout);
return (retval);
}
/*
* make a change on the screen
*/
DEBUGSTATIC int
makech(WINDOW *win, short wy)
{
char *nsp, *csp, *ce;
short wx, lch, y;
intptr_t nlsp, clsp; /* last space in lines */
wx = win->_firstch[wy] - win->_ch_off;
if (wx >= win->_maxx)
return (OK);
else if (wx < 0)
wx = 0;
lch = win->_lastch[wy] - win->_ch_off;
if (lch < 0)
return (OK);
else if (lch >= win->_maxx)
lch = win->_maxx - 1;
y = wy + win->_begy;
if (curwin)
csp = " ";
else
csp = &curscr->_y[wy + win->_begy][wx + win->_begx];
nsp = &win->_y[wy][wx];
if (CE && !curwin) {
for (ce = &win->_y[wy][win->_maxx - 1]; *ce == ' '; ce--)
if (ce <= win->_y[wy])
break;
nlsp = ce - win->_y[wy];
}
if (!curwin)
ce = CE;
else
ce = NULL;
while (wx <= lch) {
if (*nsp != *csp) {
domvcur(ly, lx, y, wx + win->_begx);
#ifdef DEBUG
fprintf(outf, "MAKECH: 1: wx = %d, lx = %d\n", wx, lx);
#endif
ly = y;
lx = wx + win->_begx;
while (wx <= lch && *nsp != *csp) {
if (ce != NULL && wx >= nlsp && *nsp == ' ') {
/*
* check for clear to end-of-line
*/
ce = &curscr->_y[ly][COLS - 1];
while (*ce == ' ')
if (ce-- <= csp)
break;
clsp = ce - curscr->_y[ly] - win->_begx;
#ifdef DEBUG
fprintf(outf, "MAKECH: clsp = %d,"
" nlsp = %d\n", clsp, nlsp);
#endif
if (clsp - nlsp >= strlen(CE) &&
clsp < win->_maxx) {
#ifdef DEBUG
fprintf(outf, "MAKECH: using"
" CE\n");
#endif
(void) _puts(CE);
lx = wx + win->_begx;
while (wx++ <= clsp)
*csp++ = ' ';
return (OK);
}
ce = NULL;
}
/*
* enter/exit standout mode as appropriate
*/
if (SO && (*nsp&_STANDOUT) !=
(curscr->_flags&_STANDOUT)) {
if (*nsp & _STANDOUT) {
(void) _puts(SO);
curscr->_flags |= _STANDOUT;
} else {
(void) _puts(SE);
curscr->_flags &= ~_STANDOUT;
}
}
wx++;
if (wx >= win->_maxx && wy == win->_maxy - 1)
if (win->_scroll) {
if ((curscr->_flags&_STANDOUT) &&
(win->_flags & _ENDLINE))
if (!MS) {
(void) _puts(SE);
curscr->_flags &=
~_STANDOUT;
}
if (!curwin)
(void) _putchar((*csp = *nsp) &
0177);
else
(void) _putchar(*nsp & 0177);
if (win->_flags&_FULLWIN && !curwin)
(void) scroll(curscr);
if (!curwin) {
ly = wy + win->_begy;
lx = wx + win->_begx;
} else {
ly = win->_begy+win->_cury;
lx = win->_begx+win->_curx;
}
return (OK);
} else if (win->_flags&_SCROLLWIN) {
wx = wx - 1;
lx = wx;
return (ERR);
}
if (!curwin)
(void) _putchar((*csp++ = *nsp) & 0177);
else
(void) _putchar(*nsp & 0177);
#ifdef FULLDEBUG
fprintf(outf,
"MAKECH:putchar(%c)\n", *nsp & 0177);
#endif
if (UC && (*nsp & _STANDOUT)) {
(void) _putchar('\b');
(void) _puts(UC);
}
nsp++;
}
#ifdef DEBUG
fprintf(outf, "MAKECH: 2: wx = %d, lx = %d\n", wx, lx);
#endif
if (lx == wx + win->_begx) /* if no change */
break;
lx = wx + win->_begx;
if (lx >= COLS && AM) {
lx = 0;
ly++;
/*
* xn glitch: chomps a newline after auto-wrap.
* we just feed it now and forget about it.
*/
if (XN) {
(void) _putchar('\n');
(void) _putchar('\r');
}
}
} else if (wx <= lch)
while (wx <= lch && *nsp == *csp) {
nsp++;
if (!curwin)
csp++;
++wx;
}
else
break;
#ifdef DEBUG
fprintf(outf, "MAKECH: 3: wx = %d, lx = %d\n", wx, lx);
#endif
}
return (OK);
}
/*
* perform a mvcur, leaving standout mode if necessary
*/
DEBUGSTATIC void
domvcur(int oy, int ox, int ny, int nx)
{
if (curscr->_flags & _STANDOUT && !MS) {
(void) _puts(SE);
curscr->_flags &= ~_STANDOUT;
}
(void) mvcur(oy, ox, ny, nx);
}