/* $NetBSD: add_wchstr.c,v 1.14 2022/10/19 06:09:27 blymn Exp $ */
/*
* Copyright (c) 2005 The NetBSD Foundation Inc.
* All rights reserved.
*
* This code is derived from code donated to the NetBSD Foundation
* by Ruibiao Qiu <ruibiao@arl.wustl.edu,ruibiao@gmail.com>.
*
*
* 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 NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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
__RCSID("$NetBSD: add_wchstr.c,v 1.14 2022/10/19 06:09:27 blymn Exp $");
#endif /* not lint */
#include <stdlib.h>
#include "curses.h"
#include "curses_private.h"
/*
* add_wchstr --
* Add a wide string to stdscr starting at (_cury, _curx).
*/
int
add_wchstr(const cchar_t *wchstr)
{
return wadd_wchnstr(stdscr, wchstr, -1);
}
/*
* wadd_wchstr --
* Add a string to the given window starting at (_cury, _curx).
*/
int
wadd_wchstr(WINDOW *win, const cchar_t *wchstr)
{
return wadd_wchnstr(win, wchstr, -1);
}
/*
* add_wchnstr --
* Add a string (at most n characters) to stdscr starting
* at (_cury, _curx). If n is negative, add the entire string.
*/
int
add_wchnstr(const cchar_t *wchstr, int n)
{
return wadd_wchnstr(stdscr, wchstr, n);
}
/*
* mvadd_wchstr --
* Add a string to stdscr starting at (y, x)
*/
int
mvadd_wchstr(int y, int x, const cchar_t *wchstr)
{
return mvwadd_wchnstr(stdscr, y, x, wchstr, -1);
}
/*
* mvwadd_wchstr --
* Add a string to the given window starting at (y, x)
*/
int
mvwadd_wchstr(WINDOW *win, int y, int x, const cchar_t *wchstr)
{
return mvwadd_wchnstr(win, y, x, wchstr, -1);
}
/*
* mvadd_wchnstr --
* Add a string of at most n characters to stdscr
* starting at (y, x).
*/
int
mvadd_wchnstr(int y, int x, const cchar_t *wchstr, int n)
{
return mvwadd_wchnstr(stdscr, y, x, wchstr, n);
}
/*
* mvwadd_wchnstr --
* Add a string of at most n characters to the given window
* starting at (y, x).
*/
int
mvwadd_wchnstr(WINDOW *win, int y, int x, const cchar_t *wchstr, int n)
{
if (wmove(win, y, x) == ERR)
return ERR;
return wadd_wchnstr(win, wchstr, n);
}
/*
* wadd_wchnstr --
* Add a string (at most n wide characters) to the given window
* starting at (_cury, _curx). If n is -1, add the entire string.
*/
int
wadd_wchnstr(WINDOW *win, const cchar_t *wchstr, int n)
{
const cchar_t *chp;
wchar_t wc;
int cw, x, y, sx, ex, newx, i, cnt;
__LDATA *lp, *tp;
nschar_t *np, *tnp;
__LINE *lnp;
__CTRACE(__CTRACE_INPUT,
"wadd_wchnstr: win = %p, wchstr = %p, n = %d\n", win, wchstr, n);
if (!wchstr)
return OK;
/* compute length of the cchar string */
if (n < -1)
return ERR;
if (n >= 0)
for (chp = wchstr, cnt = 0; n && chp->vals[0];
n--, chp++, ++cnt);
else
for (chp = wchstr, cnt = 0; chp->vals[0]; chp++, ++cnt);
__CTRACE(__CTRACE_INPUT, "wadd_wchnstr: len=%d\n", cnt);
chp = wchstr;
x = win->curx;
y = win->cury;
lp = &win->alines[y]->line[x];
lnp = win->alines[y];
cw = (*lp).wcols;
if (cw >= 0) {
sx = x;
} else {
if (wcwidth(chp->vals[0])) {
/* clear the partial character before cursor */
for (tp = lp + cw; tp < lp; tp++) {
tp->ch = win->bch;
if (_cursesi_copy_nsp(win->bnsp, tp) == ERR)
return ERR;
tp->attr = win->battr;
tp->wcols = 1;
tp->cflags = CA_BACKGROUND;
np = tp->nsp;
}
} else {
/* move to the start of current char */
lp += cw;
x += cw;
}
sx = x + cw;
}
lnp->flags |= __ISDIRTY;
newx = sx + win->ch_off;
if (newx < *lnp->firstchp)
*lnp->firstchp = newx;
/* add characters in the string */
ex = x;
while (cnt) {
x = ex;
wc = chp->vals[0];
__CTRACE(__CTRACE_INPUT, "wadd_wchnstr: adding %x", wc);
cw = wcwidth(wc);
if (cw < 0)
cw = 1;
if (cw) {
/* spacing character */
__CTRACE(__CTRACE_INPUT,
" as a spacing char(width=%d)\n", cw);
if (cw > win->maxx - ex) {
/* clear to EOL */
while (ex < win->maxx) {
lp->ch = win->bch;
if (_cursesi_copy_nsp(win->bnsp, lp)
== ERR)
return ERR;
lp->attr = win->battr;
lp->cflags = CA_BACKGROUND;
(*lp).wcols = 1;
lp++, ex++;
}
ex = win->maxx - 1;
break;
}
/* this could combine with the insertion of
* non-spacing char */
np = lp->nsp;
if (np) {
while (np) {
tnp = np->next;
free(np);
np = tnp;
}
lp->nsp = NULL;
}
lp->ch = chp->vals[0];
lp->attr = chp->attributes & WA_ATTRIBUTES;
lp->cflags &= ~CA_BACKGROUND;
(*lp).wcols = cw;
if (chp->elements > 1) {
for (i = 1; i < chp->elements; i++) {
np = (nschar_t *)
malloc(sizeof(nschar_t));
if (!np)
return ERR;
np->ch = chp->vals[i];
np->next = lp->nsp;
lp->nsp = np;
}
}
lp++, ex++;
__CTRACE(__CTRACE_INPUT,
"wadd_wchnstr: ex = %d, x = %d, cw = %d\n",
ex, x, cw);
while (ex - x <= cw - 1) {
np = lp->nsp;
if (np) {
while (np) {
tnp = np->next;
free(np);
np = tnp;
}
lp->nsp = NULL;
}
lp->ch = chp->vals[0];
lp->attr = chp->attributes & WA_ATTRIBUTES;
lp->cflags &= ~CA_BACKGROUND;
lp->cflags |= CA_CONTINUATION;
(*lp).wcols = x - ex;
lp++, ex++;
}
} else {
/* non-spacing character */
__CTRACE(__CTRACE_INPUT,
"wadd_wchnstr: as non-spacing char");
for (i = 0; i < chp->elements; i++) {
np = malloc(sizeof(nschar_t));
if (!np)
return ERR;
np->ch = chp->vals[i];
np->next = lp->nsp;
lp->nsp = np;
}
}
cnt--, chp++;
}
#ifdef DEBUG
for (i = sx; i < ex; i++) {
__CTRACE(__CTRACE_INPUT, "wadd_wchnstr: (%d,%d)=(%x,%x,%p)\n",
win->cury, i, win->alines[win->cury]->line[i].ch,
win->alines[win->cury]->line[i].attr,
win->alines[win->cury]->line[i].nsp);
}
#endif /* DEBUG */
lnp->flags |= __ISDIRTY;
newx = ex + win->ch_off;
if (newx > *lnp->lastchp)
*lnp->lastchp = newx;
__touchline(win, y, sx, ex);
return OK;
}