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      1 /*	$NetBSD: border.c,v 1.26 2024/12/25 15:35:29 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2000 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Julian Coleman.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #ifndef lint
     34 __RCSID("$NetBSD: border.c,v 1.26 2024/12/25 15:35:29 christos Exp $");
     35 #endif				/* not lint */
     36 
     37 #include <stdlib.h>
     38 #include <string.h>
     39 
     40 #include "curses.h"
     41 #include "curses_private.h"
     42 
     43 #ifndef _CURSES_USE_MACROS
     44 
     45 /*
     46  * border --
     47  *	Draw a border around stdscr using the specified
     48  *	delimiting characters.
     49  */
     50 int
     51 border(chtype left, chtype right, chtype top, chtype bottom, chtype topleft,
     52        chtype topright, chtype botleft, chtype botright)
     53 {
     54 	return wborder(stdscr, left, right, top, bottom, topleft, topright,
     55 	    botleft, botright);
     56 }
     57 
     58 #endif
     59 
     60 /*
     61  * wborder --
     62  *	Draw a border around the given window using the specified delimiting
     63  *	characters.
     64  */
     65 int
     66 wborder(WINDOW *win, chtype left, chtype right, chtype top, chtype bottom,
     67 	chtype topleft, chtype topright, chtype botleft, chtype botright)
     68 {
     69 #ifndef HAVE_WCHAR
     70 	int	 endy, endx, i;
     71 	__LDATA	*fp, *lp;
     72 
     73 	if (__predict_false(win == NULL))
     74 		return ERR;
     75 
     76 	if (!(left & __CHARTEXT))
     77 		left |= ACS_VLINE;
     78 	if (!(right & __CHARTEXT))
     79 		right |= ACS_VLINE;
     80 	if (!(top & __CHARTEXT))
     81 		top |= ACS_HLINE;
     82 	if (!(bottom & __CHARTEXT))
     83 		bottom |= ACS_HLINE;
     84 	if (!(topleft & __CHARTEXT))
     85 		topleft |= ACS_ULCORNER;
     86 	if (!(topright & __CHARTEXT))
     87 		topright |= ACS_URCORNER;
     88 	if (!(botleft & __CHARTEXT))
     89 		botleft |= ACS_LLCORNER;
     90 	if (!(botright & __CHARTEXT))
     91 		botright |= ACS_LRCORNER;
     92 
     93 	__CTRACE(__CTRACE_INPUT, "wborder: window 0x%p\n", win);
     94 	__CTRACE(__CTRACE_INPUT, "wborder: left = %c, 0x%x\n",
     95 	    left & __CHARTEXT, left & __ATTRIBUTES);
     96 	__CTRACE(__CTRACE_INPUT, "wborder: right = %c, 0x%x\n",
     97 	    right & __CHARTEXT, right & __ATTRIBUTES);
     98 	__CTRACE(__CTRACE_INPUT, "wborder: top = %c, 0x%x\n",
     99 	    top & __CHARTEXT, top & __ATTRIBUTES);
    100 	__CTRACE(__CTRACE_INPUT, "wborder: bottom = %c, 0x%x\n",
    101 	    bottom & __CHARTEXT, bottom & __ATTRIBUTES);
    102 	__CTRACE(__CTRACE_INPUT, "wborder: topleft = %c, 0x%x\n",
    103 	    topleft & __CHARTEXT, topleft & __ATTRIBUTES);
    104 	__CTRACE(__CTRACE_INPUT, "wborder: topright = %c, 0x%x\n",
    105 	    topright & __CHARTEXT, topright & __ATTRIBUTES);
    106 	__CTRACE(__CTRACE_INPUT, "wborder: botleft = %c, 0x%x\n",
    107 	    botleft & __CHARTEXT, botleft & __ATTRIBUTES);
    108 	__CTRACE(__CTRACE_INPUT, "wborder: botright = %c, 0x%x\n",
    109 	    botright & __CHARTEXT, botright & __ATTRIBUTES);
    110 
    111 	/* Merge window and background attributes */
    112 	left |= (left & __COLOR) ? (win->wattr & ~__COLOR) : win->wattr;
    113 	left |= (left & __COLOR) ? (win->battr & ~__COLOR) : win->battr;
    114 	right |= (right & __COLOR) ? (win->wattr & ~__COLOR) : win->wattr;
    115 	right |= (right & __COLOR) ? (win->battr & ~__COLOR) : win->battr;
    116 	top |= (top & __COLOR) ? (win->wattr & ~__COLOR) : win->wattr;
    117 	top |= (top & __COLOR) ? (win->battr & ~__COLOR) : win->battr;
    118 	bottom |= (bottom & __COLOR) ? (win->wattr & ~__COLOR) : win->wattr;
    119 	bottom |= (bottom & __COLOR) ? (win->battr & ~__COLOR) : win->battr;
    120 	topleft |= (topleft & __COLOR) ? (win->wattr & ~__COLOR) : win->wattr;
    121 	topleft |= (topleft & __COLOR) ? (win->battr & ~__COLOR) : win->battr;
    122 	topright |= (topright & __COLOR) ? (win->wattr & ~__COLOR) : win->wattr;
    123 	topright |= (topright & __COLOR) ? (win->battr & ~__COLOR) : win->battr;
    124 	botleft |= (botleft & __COLOR) ? (win->wattr & ~__COLOR) : win->wattr;
    125 	botleft |= (botleft & __COLOR) ? (win->battr & ~__COLOR) : win->battr;
    126 	botright |= (botright & __COLOR) ? (win->wattr & ~__COLOR) : win->wattr;
    127 	botright |= (botright & __COLOR) ? (win->battr & ~__COLOR) : win->battr;
    128 
    129 	endx = win->maxx - 1;
    130 	endy = win->maxy - 1;
    131 	fp = win->alines[0]->line;
    132 	lp = win->alines[endy]->line;
    133 
    134 	/* Sides */
    135 	for (i = 1; i < endy; i++) {
    136 		win->alines[i]->line[0].ch = (wchar_t) left & __CHARTEXT;
    137 		win->alines[i]->line[0].attr = (attr_t) left & __ATTRIBUTES;
    138 		win->alines[i]->line[endx].ch = (wchar_t) right & __CHARTEXT;
    139 		win->alines[i]->line[endx].attr = (attr_t) right & __ATTRIBUTES;
    140 	}
    141 	for (i = 1; i < endx; i++) {
    142 		fp[i].ch = (wchar_t) top & __CHARTEXT;
    143 		fp[i].attr = (attr_t) top & __ATTRIBUTES;
    144 		lp[i].ch = (wchar_t) bottom & __CHARTEXT;
    145 		lp[i].attr = (attr_t) bottom & __ATTRIBUTES;
    146 	}
    147 
    148 	/* Corners */
    149 	if (!(win->maxy == LINES && win->maxx == COLS &&
    150 	    (win->flags & __SCROLLOK) && (win->flags & __SCROLLWIN))) {
    151 		fp[0].ch = (wchar_t) topleft & __CHARTEXT;
    152 		fp[0].attr = (attr_t) topleft & __ATTRIBUTES;
    153 		fp[endx].ch = (wchar_t) topright & __CHARTEXT;
    154 		fp[endx].attr = (attr_t) topright & __ATTRIBUTES;
    155 		lp[0].ch = (wchar_t) botleft & __CHARTEXT;
    156 		lp[0].attr = (attr_t) botleft & __ATTRIBUTES;
    157 		lp[endx].ch = (wchar_t) botright & __CHARTEXT;
    158 		lp[endx].attr = (attr_t) botright & __ATTRIBUTES;
    159 	}
    160 	__touchwin(win, 0);
    161 	return OK;
    162 #else /* HAVE_WCHAR */
    163 	cchar_t ls, rs, ts, bs, tl, tr, bl, br;
    164 	cchar_t *lsp, *rsp, *tsp, *bsp, *tlp, *trp, *blp, *brp;
    165 
    166 #define S(in, out, def) \
    167 	if (in & __CHARTEXT) { \
    168 		__cursesi_chtype_to_cchar(in, &out); \
    169 	} else { \
    170 		memcpy(&out, def, sizeof(cchar_t)); \
    171 		out.attributes |= in & __ATTRIBUTES; \
    172 	} \
    173 	out##p = &out;
    174 
    175 	S(left, ls, WACS_VLINE);
    176 	S(right, rs, WACS_VLINE);
    177 	S(top, ts, WACS_HLINE);
    178 	S(bottom, bs, WACS_HLINE);
    179 	S(topleft, tl, WACS_ULCORNER);
    180 	S(topright, tr, WACS_URCORNER);
    181 	S(botleft, bl, WACS_LLCORNER);
    182 	S(botright, br, WACS_LRCORNER);
    183 #undef S
    184 	return wborder_set(win, lsp, rsp, tsp, bsp, tlp, trp, blp, brp);
    185 #endif /* HAVE_WCHAR */
    186 }
    187 
    188 int border_set(const cchar_t *ls, const cchar_t *rs, const cchar_t *ts,
    189 	   const cchar_t *bs, const cchar_t *tl, const cchar_t *tr,
    190 	   const cchar_t *bl, const cchar_t *br)
    191 {
    192 #ifndef HAVE_WCHAR
    193 	return ERR;
    194 #else
    195 	return wborder_set(stdscr, ls, rs, ts, bs, tl, tr, bl, br);
    196 #endif /* HAVE_WCHAR */
    197 }
    198 
    199 int wborder_set(WINDOW *win, const cchar_t *ls, const cchar_t *rs,
    200 		const cchar_t *ts, const cchar_t *bs,
    201 		const cchar_t *tl, const cchar_t *tr,
    202 		const cchar_t *bl, const cchar_t *br)
    203 {
    204 #ifndef HAVE_WCHAR
    205 	return ERR;
    206 #else
    207 	int	 endy, endx, i, j, k, cw, pcw, tlcw, blcw, trcw, brcw;
    208 	cchar_t left, right, bottom, top, topleft, topright, botleft, botright;
    209 	nschar_t *np, *tnp;
    210 
    211 	if (__predict_false(win == NULL))
    212 		return ERR;
    213 
    214 	if (ls && wcwidth(ls->vals[0]))
    215 		memcpy(&left, ls, sizeof(cchar_t));
    216 	else
    217 		memcpy(&left, WACS_VLINE, sizeof(cchar_t));
    218 	if (rs && wcwidth( rs->vals[0]))
    219 		memcpy(&right, rs, sizeof(cchar_t));
    220 	else
    221 		memcpy(&right, WACS_VLINE, sizeof(cchar_t));
    222 	if (ts && wcwidth( ts->vals[0]))
    223 		memcpy(&top, ts, sizeof(cchar_t));
    224 	else
    225 		memcpy( &top, WACS_HLINE, sizeof(cchar_t));
    226 	if (bs && wcwidth( bs->vals[0]))
    227 		memcpy(&bottom, bs, sizeof(cchar_t));
    228 	else
    229 		memcpy(&bottom, WACS_HLINE, sizeof(cchar_t));
    230 	if (tl && wcwidth(tl->vals[0]))
    231 		memcpy( &topleft, tl, sizeof(cchar_t));
    232 	else
    233 		memcpy(&topleft, WACS_ULCORNER, sizeof(cchar_t));
    234 	if (tr && wcwidth( tr->vals[0]))
    235 		memcpy(&topright, tr, sizeof(cchar_t));
    236 	else
    237 		memcpy(&topright, WACS_URCORNER, sizeof( cchar_t ));
    238 	if (bl && wcwidth( bl->vals[0]))
    239 		memcpy(&botleft, bl, sizeof(cchar_t));
    240 	else
    241 		memcpy(&botleft, WACS_LLCORNER, sizeof(cchar_t));
    242 	if (br && wcwidth( br->vals[0]))
    243 		memcpy(&botright, br, sizeof(cchar_t));
    244 	else
    245 		memcpy(&botright, WACS_LRCORNER, sizeof(cchar_t));
    246 
    247 	__CTRACE(__CTRACE_INPUT, "wborder_set: window 0x%p\n", win);
    248 	__CTRACE(__CTRACE_INPUT, "wborder_set: left = %c, 0x%x\n",
    249 	    left.vals[0], left.attributes );
    250 	__CTRACE(__CTRACE_INPUT, "wborder_set: right = %c, 0x%x\n",
    251 	    right.vals[0], right.attributes );
    252 	__CTRACE(__CTRACE_INPUT, "wborder_set: top = %c, 0x%x\n",
    253 	    top.vals[0], top.attributes );
    254 	__CTRACE(__CTRACE_INPUT, "wborder_set: bottom = %c, 0x%x\n",
    255 	    bottom.vals[0], bottom.attributes );
    256 	__CTRACE(__CTRACE_INPUT, "wborder_set: topleft = %c, 0x%x\n",
    257 	    topleft.vals[0], topleft.attributes );
    258 	__CTRACE(__CTRACE_INPUT, "wborder_set: topright = %c, 0x%x\n",
    259 	    topright.vals[0], topright.attributes );
    260 	__CTRACE(__CTRACE_INPUT, "wborder_set: botleft = %c, 0x%x\n",
    261 	    botleft.vals[0], botleft.attributes );
    262 	__CTRACE(__CTRACE_INPUT, "wborder_set: botright = %c, 0x%x\n",
    263 	    botright.vals[0], botright.attributes );
    264 
    265 	/* Merge window attributes */
    266 	left.attributes |= (left.attributes & __COLOR) ?
    267 		(win->wattr & ~__COLOR) : win->wattr;
    268 	left.attributes |= (left.attributes & __COLOR) ?
    269 		(win->battr & ~__COLOR) : win->battr;
    270 	right.attributes |= (right.attributes & __COLOR) ?
    271 		(win->wattr & ~__COLOR) : win->wattr;
    272 	right.attributes |= (right.attributes & __COLOR) ?
    273 		(win->battr & ~__COLOR) : win->battr;
    274 	top.attributes |= (top.attributes & __COLOR) ?
    275 		(win->wattr & ~__COLOR) : win->wattr;
    276 	top.attributes |= (top.attributes & __COLOR) ?
    277 		(win->battr & ~__COLOR) : win->battr;
    278 	bottom.attributes |= (bottom.attributes & __COLOR) ?
    279 		(win->wattr & ~__COLOR) : win->wattr;
    280 	bottom.attributes |= (bottom.attributes & __COLOR) ?
    281 		(win->battr & ~__COLOR) : win->battr;
    282 	topleft.attributes |= (topleft.attributes & __COLOR) ?
    283 		(win->wattr & ~__COLOR) : win->wattr;
    284 	topleft.attributes |= (topleft.attributes & __COLOR) ?
    285 		(win->battr & ~__COLOR) : win->battr;
    286 	topright.attributes |= (topright.attributes & __COLOR) ?
    287 		(win->wattr & ~__COLOR) : win->wattr;
    288 	topright.attributes |= (topright.attributes & __COLOR) ?
    289 		(win->battr & ~__COLOR) : win->battr;
    290 	botleft.attributes |= (botleft.attributes & __COLOR) ?
    291 		(win->wattr & ~__COLOR) : win->wattr;
    292 	botleft.attributes |= (botleft.attributes & __COLOR) ?
    293 		(win->battr & ~__COLOR) : win->battr;
    294 	botright.attributes |= (botright.attributes & __COLOR) ?
    295 		(win->wattr & ~__COLOR) : win->wattr;
    296 	botright.attributes |= (botright.attributes & __COLOR) ?
    297 		(win->battr & ~__COLOR) : win->battr;
    298 
    299 	endx = win->maxx - 1;
    300 	endy = win->maxy - 1;
    301 
    302 	/* Sides */
    303 	for (i = 1; i < endy; i++) {
    304 		/* left border */
    305 		cw = wcwidth(left.vals[0]);
    306 		if (cw < 0)
    307 			cw = 1;
    308 		for ( j = 0; j < cw; j++ ) {
    309 			win->alines[i]->line[j].ch = left.vals[0];
    310 			win->alines[i]->line[j].cflags &= ~CA_BACKGROUND;
    311 			win->alines[i]->line[j].attr = left.attributes;
    312 			np = win->alines[i]->line[j].nsp;
    313 			if (np) {
    314 				while (np) {
    315 					tnp = np->next;
    316 					free(np);
    317 					np = tnp;
    318 				}
    319 				win->alines[i]->line[j].nsp = NULL;
    320 			}
    321 			if (j)
    322 				win->alines[i]->line[j].wcols = -j;
    323 			else {
    324 				win->alines[i]->line[j].wcols = cw;
    325 				if (left.elements > 1) {
    326 					for (k = 1; k < left.elements; k++) {
    327 						np = malloc(sizeof(nschar_t));
    328 						if (!np)
    329 							return ERR;
    330 						np->ch = left.vals[ k ];
    331 						np->next = win->alines[i]->line[j].nsp;
    332 						win->alines[i]->line[j].nsp
    333 							= np;
    334 					}
    335 				}
    336 			}
    337 		}
    338 		for (j = cw; win->alines[i]->line[j].wcols < 0; j++) {
    339 			__CTRACE(__CTRACE_INPUT,
    340 			    "wborder_set: clean out partial char[%d]", j);
    341 			win->alines[i]->line[j].ch = win->bch;
    342 			win->alines[i]->line[j].cflags |= CA_BACKGROUND;
    343 			if (_cursesi_copy_nsp(win->bnsp,
    344 					      &win->alines[i]->line[j]) == ERR)
    345 				return ERR;
    346 			win->alines[i]->line[j].wcols = 1;
    347 		}
    348 		/* right border */
    349 		cw = wcwidth(right.vals[0]);
    350 		if (cw < 0)
    351 			cw = 1;
    352 		pcw = win->alines[i]->line[endx - cw].wcols;
    353 		for ( j = endx - cw + 1; j <= endx; j++ ) {
    354 			win->alines[i]->line[j].ch = right.vals[0];
    355 			win->alines[i]->line[j].cflags &= ~CA_BACKGROUND;
    356 			win->alines[i]->line[j].attr = right.attributes;
    357 			np = win->alines[i]->line[j].nsp;
    358 			if (np) {
    359 				while (np) {
    360 					tnp = np->next;
    361 					free(np);
    362 					np = tnp;
    363 				}
    364 				win->alines[i]->line[j].nsp = NULL;
    365 			}
    366 			if (j == endx - cw + 1) {
    367 				win->alines[i]->line[j].wcols = cw;
    368 				if (right.elements > 1) {
    369 					for (k = 1; k < right.elements; k++) {
    370 						np = malloc(sizeof(nschar_t));
    371 						if (!np)
    372 							return ERR;
    373 						np->ch = right.vals[ k ];
    374 						np->next = win->alines[i]->line[j].nsp;
    375 						win->alines[i]->line[j].nsp
    376 							= np;
    377 					}
    378 				}
    379 			} else
    380 				win->alines[i]->line[j].wcols =
    381 				    endx - cw + 1 - j;
    382 		}
    383 		if (pcw != 1) {
    384 			__CTRACE(__CTRACE_INPUT,
    385 			    "wborder_set: clean out partial chars[%d:%d]",
    386 			    endx - cw + pcw, endx - cw);
    387 			k = pcw < 0 ? endx -cw + pcw : endx - cw;
    388 			for (j = endx - cw; j >= k; j--) {
    389 				win->alines[i]->line[j].ch = win->bch;
    390 				win->alines[i]->line[j].cflags |= CA_BACKGROUND;
    391 				if (_cursesi_copy_nsp(win->bnsp,
    392 					       &win->alines[i]->line[j]) == ERR)
    393 					return ERR;
    394 				win->alines[i]->line[j].attr = win->battr;
    395 				win->alines[i]->line[j].wcols = 1;
    396 			}
    397 		}
    398 	}
    399 	tlcw = wcwidth(topleft.vals[0]);
    400 	if (tlcw < 0)
    401 		tlcw = 1;
    402 	blcw = wcwidth(botleft.vals[0]);
    403 	if (blcw < 0)
    404 		blcw = 1;
    405 	trcw = wcwidth(topright.vals[0]);
    406 	if (trcw < 0)
    407 		trcw = 1;
    408 	brcw = wcwidth(botright.vals[0]);
    409 	if (brcw < 0)
    410 		brcw = 1;
    411 	/* upper border */
    412 	cw = wcwidth(top.vals[0]);
    413 	if (cw < 0)
    414 		cw = 1;
    415 	for (i = tlcw; i <= min( endx - cw, endx - trcw); i += cw) {
    416 		for (j = 0; j < cw; j++) {
    417 			win->alines[0]->line[i + j].ch = top.vals[0];
    418 			win->alines[0]->line[i + j].cflags &= ~CA_BACKGROUND;
    419 			win->alines[0]->line[i + j].attr = top.attributes;
    420 			np = win->alines[0]->line[i + j].nsp;
    421 			if (np) {
    422 				while (np) {
    423 					tnp = np->next;
    424 					free(np);
    425 					np = tnp;
    426 				}
    427 				win->alines[0]->line[i + j].nsp = NULL;
    428 			}
    429 			if (j)
    430 				win->alines[ 0 ]->line[ i + j ].wcols = -j;
    431 			else {
    432 				win->alines[ 0 ]->line[ i + j ].wcols = cw;
    433 				if ( top.elements > 1 ) {
    434 					for (k = 1; k < top.elements; k++) {
    435 						np = malloc(sizeof(nschar_t));
    436 						if (!np)
    437 							return ERR;
    438 						np->ch = top.vals[k];
    439 						np->next = win->alines[0]->line[i + j].nsp;
    440 						win->alines[0]->line[i + j].nsp
    441 							= np;
    442 					}
    443 				}
    444 			}
    445 		}
    446 	}
    447 	while (i <= endx - trcw) {
    448 		win->alines[0]->line[i].ch = win->bch;
    449 		win->alines[0]->line[i].cflags |= CA_BACKGROUND;
    450 		if (_cursesi_copy_nsp(win->bnsp,
    451 				      &win->alines[0]->line[i]) == ERR)
    452 			return ERR;
    453 		win->alines[0]->line[i].attr = win->battr;
    454 		win->alines[0]->line[i].wcols = 1;
    455 		i++;
    456 	}
    457 	/* lower border */
    458 	for (i = blcw; i <= min( endx - cw, endx - brcw); i += cw) {
    459 		for (j = 0; j < cw; j++) {
    460 			win->alines[endy]->line[i + j].ch = bottom.vals[0];
    461 			win->alines[endy]->line[i + j].cflags &= ~CA_BACKGROUND;
    462 			win->alines[endy]->line[i + j].attr = bottom.attributes;
    463 			np = win->alines[endy]->line[i + j].nsp;
    464 			if (np) {
    465 				while (np) {
    466 					tnp = np->next;
    467 					free(np);
    468 					np = tnp;
    469 				}
    470 				win->alines[endy]->line[i + j].nsp = NULL;
    471 			}
    472 			if (j)
    473 				win->alines[endy]->line[i + j].wcols = -j;
    474 			else {
    475 				win->alines[endy]->line[i + j].wcols = cw;
    476 				if (bottom.elements > 1) {
    477 					for (k = 1; k < bottom.elements; k++) {
    478 						np = malloc(sizeof(nschar_t));
    479 						if (!np)
    480 							return ERR;
    481 						np->ch = bottom.vals[ k ];
    482 						np->next = win->alines[endy]->line[i + j].nsp;
    483 						win->alines[endy]->line[i + j].nsp = np;
    484 					}
    485 				}
    486 			}
    487 		}
    488 	}
    489 	while (i <= endx - brcw) {
    490 		win->alines[endy]->line[i].ch = win->bch;
    491 		win->alines[endy]->line[i].cflags |= CA_BACKGROUND;
    492 		if (_cursesi_copy_nsp(win->bnsp,
    493 				      &win->alines[endy]->line[i]) == ERR)
    494 			return ERR;
    495 		win->alines[endy]->line[i].attr = win->battr;
    496 		win->alines[endy]->line[i].wcols = 1;
    497 		i++;
    498 	}
    499 
    500 	/* Corners */
    501 	if (!(win->maxy == LINES && win->maxx == COLS &&
    502 		(win->flags & __SCROLLOK) && (win->flags & __SCROLLWIN))) {
    503 		for (i = 0; i < tlcw; i++) {
    504 			win->alines[0]->line[i].ch = topleft.vals[0];
    505 			win->alines[0]->line[i].cflags &= ~CA_BACKGROUND;
    506 			win->alines[0]->line[i].attr = topleft.attributes;
    507 			np = win->alines[0]->line[i].nsp;
    508 			if (np) {
    509 				while (np) {
    510 					tnp = np->next;
    511 					free(np);
    512 					np = tnp;
    513 				}
    514 				win->alines[0]->line[i].nsp = NULL;
    515 			}
    516 			if (i)
    517 				win->alines[0]->line[i].wcols = -i;
    518 			else {
    519 				win->alines[0]->line[i].wcols = tlcw;
    520 				if (topleft.elements > 1) {
    521 					for (k = 1; k < topleft.elements; k++)
    522 					{
    523 						np = malloc(sizeof(nschar_t));
    524 						if (!np)
    525 							return ERR;
    526 						np->ch = topleft.vals[k];
    527 						np->next = win->alines[0]->line[i].nsp;
    528 						win->alines[0]->line[i].nsp = np;
    529 					}
    530 				}
    531 			}
    532 		}
    533 		for (i = endx - trcw + 1; i <= endx; i++) {
    534 			win->alines[0]->line[i].ch = topright.vals[0];
    535 			win->alines[0]->line[i].cflags &= ~CA_BACKGROUND;
    536 			win->alines[0]->line[i].attr = topright.attributes;
    537 			np = win->alines[0]->line[i].nsp;
    538 			if (np) {
    539 				while (np) {
    540 					tnp = np->next;
    541 					free(np);
    542 					np = tnp;
    543 				}
    544 				win->alines[0]->line[i].nsp = NULL;
    545 			}
    546 			if (i == endx - trcw + 1) {
    547 				win->alines[0]->line[i].wcols = trcw;
    548 				if (topright.elements > 1) {
    549 					for (k = 1; k < topright.elements;k ++)
    550 					{
    551 						np = malloc(sizeof(nschar_t));
    552 						if (!np)
    553 							return ERR;
    554 						np->ch = topright.vals[k];
    555 						np->next = win->alines[0]->line[i].nsp;
    556 						win->alines[ 0 ]->line[i].nsp = np;
    557 					}
    558 				}
    559 			} else
    560 				win->alines[0]->line[i].wcols =
    561 				    endx - trcw + 1 - i;
    562 		}
    563 		for (i = 0; i < blcw; i++) {
    564 			win->alines[endy]->line[i].ch = botleft.vals[0];
    565 			win->alines[endy]->line[i].cflags &= ~CA_BACKGROUND;
    566 			win->alines[endy]->line[i].attr = botleft.attributes;
    567 			np = win->alines[ endy ]->line[i].nsp;
    568 			if (np) {
    569 				while (np) {
    570 					tnp = np->next;
    571 					free(np);
    572 					np = tnp;
    573 				}
    574 				win->alines[endy]->line[i].nsp = NULL;
    575 			}
    576 			if (i)
    577 				win->alines[endy]->line[i].wcols = -i;
    578 			else {
    579 				win->alines[endy]->line[i].wcols = blcw;
    580 				if (botleft.elements > 1) {
    581 					for (k = 1; k < botleft.elements; k++) {
    582 						np = malloc(sizeof(nschar_t));
    583 						if (!np)
    584 							return ERR;
    585 						np->ch = botleft.vals[ k ];
    586 						np->next = win->alines[endy]->line[i].nsp;
    587 						win->alines[endy]->line[i].nsp = np;
    588 					}
    589 				}
    590 			}
    591 		}
    592 		for (i = endx - brcw + 1; i <= endx; i++) {
    593 			win->alines[endy]->line[i].ch = botright.vals[0];
    594 			win->alines[endy]->line[i].cflags &= ~CA_BACKGROUND;
    595 			win->alines[endy]->line[i].attr = botright.attributes;
    596 			np = win->alines[endy]->line[i].nsp;
    597 			if (np) {
    598 				while (np) {
    599 					tnp = np->next;
    600 					free(np);
    601 					np = tnp;
    602 				}
    603 				win->alines[endy]->line[i].nsp = NULL;
    604 			}
    605 			if (i == endx - brcw + 1) {
    606 				win->alines[endy]->line[i].wcols = brcw;
    607 				if (botright.elements > 1) {
    608 					for (k = 1; k < botright.elements; k++){
    609 						np = malloc(sizeof(nschar_t));
    610 						if (!np)
    611 							return ERR;
    612 						np->ch = botright.vals[k];
    613 						np->next = win->alines[endy]->line[i].nsp;
    614 						win->alines[endy]->line[i].nsp = np;
    615 					}
    616 				}
    617 			} else
    618 				win->alines[endy]->line[i].wcols =
    619 				    endx - brcw + 1 - i;
    620 		}
    621 	}
    622 	__touchwin(win, 0);
    623 	return OK;
    624 #endif /* HAVE_WCHAR */
    625 }
    626