1 /* $NetBSD: newwin.c,v 1.67 2022/05/03 07:25:34 blymn Exp $ */
2
3 /*
4 * Copyright (c) 1981, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 #ifndef lint
34 #if 0
35 static char sccsid[] = "@(#)newwin.c 8.3 (Berkeley) 7/27/94";
36 #else
37 __RCSID("$NetBSD: newwin.c,v 1.67 2022/05/03 07:25:34 blymn Exp $");
38 #endif
39 #endif /* not lint */
40
41 #include <stdlib.h>
42
43 #include "curses.h"
44 #include "curses_private.h"
45
46
47 static WINDOW *__makenew(SCREEN *screen, int nlines, int ncols, int by,
48 int bx, int sub, int ispad);
49 static WINDOW *__subwin(WINDOW *orig, int nlines, int ncols, int by, int bx,
50 int ispad);
51
52 /*
53 * derwin --
54 * Create a new window in the same manner as subwin but (by, bx)
55 * are relative to the origin of window orig instead of absolute.
56 */
57 WINDOW *
derwin(WINDOW * orig,int nlines,int ncols,int by,int bx)58 derwin(WINDOW *orig, int nlines, int ncols, int by, int bx)
59 {
60
61 return __subwin(orig, nlines, ncols, orig->begy + by, orig->begx + bx,
62 FALSE);
63 }
64
65 /*
66 * subpad --
67 * Create a new pad in the same manner as subwin but (by, bx)
68 * are relative to the origin of window orig instead of absolute.
69 */
70 WINDOW *
subpad(WINDOW * orig,int nlines,int ncols,int by,int bx)71 subpad(WINDOW *orig, int nlines, int ncols, int by, int bx)
72 {
73
74 return __subwin(orig, nlines, ncols, orig->begy + by, orig->begx + bx,
75 TRUE);
76 }
77
78 /*
79 * dupwin --
80 * Create a copy of the given window.
81 */
82 WINDOW *
dupwin(WINDOW * win)83 dupwin(WINDOW *win)
84 {
85 WINDOW *new_one;
86
87 if ((new_one = __newwin(_cursesi_screen, win->maxy, win->maxx,
88 win->begy, win->begx, FALSE,
89 win == stdscr ? TRUE : FALSE)) == NULL)
90 return NULL;
91
92 overwrite(win, new_one);
93 return new_one;
94 }
95
96 /*
97 * newwin --
98 * Allocate space for and set up defaults for a new window.
99 */
100 WINDOW *
newwin(int nlines,int ncols,int by,int bx)101 newwin(int nlines, int ncols, int by, int bx)
102 {
103
104 return __newwin(_cursesi_screen, nlines, ncols, by, bx, FALSE, FALSE);
105 }
106
107 /*
108 * newpad --
109 * Allocate space for and set up defaults for a new pad.
110 */
111 WINDOW *
newpad(int nlines,int ncols)112 newpad(int nlines, int ncols)
113 {
114
115 if (nlines < 1 || ncols < 1)
116 return NULL;
117 return __newwin(_cursesi_screen, nlines, ncols, 0, 0, TRUE, FALSE);
118 }
119
120 WINDOW *
__newwin(SCREEN * screen,int nlines,int ncols,int by,int bx,int ispad,int isstdscr)121 __newwin(SCREEN *screen, int nlines, int ncols, int by, int bx, int ispad,
122 int isstdscr)
123 {
124 WINDOW *win;
125 __LINE *lp;
126 int i, j;
127 int ry, maxy, maxx;
128 __LDATA *sp;
129
130 if (by < 0 || bx < 0)
131 return NULL;
132
133 if (isstdscr) {
134 ry = __rippedlines(screen, -1);
135 by += __rippedlines(screen, 1);
136 } else
137 ry = 0;
138
139 maxy = nlines > 0 ? nlines : LINES - by - ry + nlines;
140 maxx = ncols > 0 ? ncols : COLS - bx + ncols;
141
142 if ((win = __makenew(screen, maxy, maxx, by, bx, 0, ispad)) == NULL)
143 return NULL;
144
145 #ifdef HAVE_WCHAR
146 win->bch = (wchar_t) btowc((int) ' ');
147 #else
148 win->bch = ' ';
149 #endif
150
151 if (__using_color)
152 win->battr |= __default_color;
153 win->nextp = win;
154 win->ch_off = 0;
155 win->orig = NULL;
156 win->reqy = nlines;
157 win->reqx = ncols;
158
159 __CTRACE(__CTRACE_WINDOW, "newwin: win->ch_off = %d\n", win->ch_off);
160
161 for (i = 0; i < maxy; i++) {
162 lp = win->alines[i];
163 if (ispad)
164 lp->flags = __ISDIRTY;
165 else
166 lp->flags = 0;
167 for (sp = lp->line, j = 0; j < maxx; j++, sp++) {
168 sp->attr = 0;
169 sp->cflags = CA_BACKGROUND;
170 sp->ch = win->bch;
171 #ifdef HAVE_WCHAR
172 sp->nsp = NULL;
173 sp->wcols = 1;
174 #endif /* HAVE_WCHAR */
175 }
176 lp->hash = __hash_line(lp->line, maxx);
177 }
178 return (win);
179 }
180
181 WINDOW *
subwin(WINDOW * orig,int nlines,int ncols,int by,int bx)182 subwin(WINDOW *orig, int nlines, int ncols, int by, int bx)
183 {
184
185 return __subwin(orig, nlines, ncols, by, bx, FALSE);
186 }
187
188 static WINDOW *
__subwin(WINDOW * orig,int nlines,int ncols,int by,int bx,int ispad)189 __subwin(WINDOW *orig, int nlines, int ncols, int by, int bx, int ispad)
190 {
191 int i;
192 __LINE *lp;
193 WINDOW *win;
194 int maxy, maxx;
195
196 __CTRACE(__CTRACE_WINDOW, "subwin: (%p, %d, %d, %d, %d, %d)\n",
197 orig, nlines, ncols, by, bx, ispad);
198 if (orig == NULL)
199 return NULL;
200
201 /* Make sure window fits inside the original one. */
202 maxy = nlines > 0 ? nlines : orig->maxy + orig->begy - by + nlines;
203 maxx = ncols > 0 ? ncols : orig->maxx + orig->begx - bx + ncols;
204 if (by < orig->begy || bx < orig->begx
205 || by + maxy > orig->maxy + orig->begy
206 || bx + maxx > orig->maxx + orig->begx)
207 return NULL;
208 if ((win = __makenew(_cursesi_screen, maxy, maxx,
209 by, bx, 1, ispad)) == NULL)
210 return NULL;
211 win->bch = orig->bch;
212 win->battr = orig->battr;
213 win->reqy = nlines;
214 win->reqx = ncols;
215 win->nextp = orig->nextp;
216 orig->nextp = win;
217 win->orig = orig;
218
219 /* Initialize flags here so that refresh can also use __set_subwin. */
220 for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++)
221 lp->flags = 0;
222 __set_subwin(orig, win);
223 return win;
224 }
225 /*
226 * This code is shared with mvwin().
227 */
228 void
__set_subwin(WINDOW * orig,WINDOW * win)229 __set_subwin(WINDOW *orig, WINDOW *win)
230 {
231 int i;
232 __LINE *lp, *olp;
233
234 win->ch_off = win->begx - orig->begx;
235 /* Point line pointers to line space. */
236 for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) {
237 win->alines[i] = lp;
238 olp = orig->alines[i + win->begy - orig->begy];
239 #ifdef DEBUG
240 lp->sentinel = SENTINEL_VALUE;
241 #endif
242 lp->line = &olp->line[win->ch_off];
243 lp->firstchp = &olp->firstch;
244 lp->lastchp = &olp->lastch;
245 lp->hash = __hash_line(lp->line, win->maxx);
246 }
247
248 __CTRACE(__CTRACE_WINDOW, "__set_subwin: win->ch_off = %d\n",
249 win->ch_off);
250 }
251 /*
252 * __makenew --
253 * Set up a window buffer and returns a pointer to it.
254 */
255 static WINDOW *
__makenew(SCREEN * screen,int nlines,int ncols,int by,int bx,int sub,int ispad)256 __makenew(SCREEN *screen, int nlines, int ncols, int by, int bx, int sub,
257 int ispad)
258 {
259 WINDOW *win;
260 __LINE *lp;
261 struct __winlist *wlp, *wlp2;
262 int i;
263
264
265 __CTRACE(__CTRACE_WINDOW, "makenew: (%d, %d, %d, %d)\n",
266 nlines, ncols, by, bx);
267 if (nlines <= 0 || ncols <= 0)
268 return NULL;
269
270 if ((win = malloc(sizeof(WINDOW))) == NULL)
271 return NULL;
272 __CTRACE(__CTRACE_WINDOW, "makenew: win = %p\n", win);
273 win->fp = NULL;
274 win->buf = NULL;
275 win->buflen = 0;
276
277 /* Set up line pointer array and line space. */
278 if ((win->alines = malloc(nlines * sizeof(__LINE *))) == NULL) {
279 free(win);
280 return NULL;
281 }
282 if ((win->lspace = calloc(nlines, sizeof(__LINE))) == NULL) {
283 free(win->alines);
284 free(win);
285 return NULL;
286 }
287 /* Don't allocate window and line space if it's a subwindow */
288 if (sub)
289 win->wspace = NULL;
290 else {
291 /*
292 * Allocate window space in one chunk.
293 */
294 if ((win->wspace =
295 calloc(ncols * nlines, sizeof(__LDATA))) == NULL) {
296 free(win->lspace);
297 free(win->alines);
298 free(win);
299 return NULL;
300 }
301 /*
302 * Append window to window list.
303 */
304 if ((wlp = malloc(sizeof(struct __winlist))) == NULL) {
305 free(win->wspace);
306 free(win->lspace);
307 free(win->alines);
308 free(win);
309 return NULL;
310 }
311 wlp->winp = win;
312 wlp->nextp = NULL;
313 if (screen->winlistp == NULL)
314 screen->winlistp = wlp;
315 else {
316 wlp2 = screen->winlistp;
317 while (wlp2->nextp != NULL)
318 wlp2 = wlp2->nextp;
319 wlp2->nextp = wlp;
320 }
321 /*
322 * Point line pointers to line space, and lines themselves into
323 * window space.
324 */
325 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) {
326 win->alines[i] = lp;
327 lp->line = &win->wspace[i * ncols];
328 #ifdef DEBUG
329 lp->sentinel = SENTINEL_VALUE;
330 #endif
331 lp->firstchp = &lp->firstch;
332 lp->lastchp = &lp->lastch;
333 if (ispad) {
334 lp->firstch = 0;
335 lp->lastch = ncols;
336 } else {
337 lp->firstch = ncols;
338 lp->lastch = 0;
339 }
340 }
341 }
342 __CTRACE(__CTRACE_WINDOW, "makenew: ncols = %d\n", ncols);
343 win->screen = screen;
344 win->cury = win->curx = 0;
345 win->maxy = nlines;
346 win->maxx = ncols;
347 win->reqy = nlines;
348 win->reqx = ncols;
349
350 win->begy = by;
351 win->begx = bx;
352 win->flags = (__IDLINE | __IDCHAR);
353 win->delay = -1;
354 win->wattr = 0;
355 win->battr = 0;
356 #ifdef HAVE_WCHAR
357 win->bnsp = NULL;
358 win->wcols = 1;
359 #endif /* HAVE_WCHAR */
360 win->scr_t = 0;
361 win->scr_b = win->maxy - 1;
362 if (ispad) {
363 win->flags |= __ISPAD;
364 win->pbegy = 0;
365 win->pbegx = 0;
366 win->sbegy = 0;
367 win->sbegx = 0;
368 win->smaxy = 0;
369 win->smaxx = 0;
370 } else
371 __swflags(win);
372 __CTRACE(__CTRACE_WINDOW, "makenew: sub = %d\n", sub);
373 __CTRACE(__CTRACE_WINDOW, "makenew: ispad = %d\n", ispad);
374 __CTRACE(__CTRACE_WINDOW, "makenew: win->wattr = %08x\n", win->wattr);
375 __CTRACE(__CTRACE_WINDOW, "makenew: win->flags = %#.4x\n", win->flags);
376 __CTRACE(__CTRACE_WINDOW, "makenew: win->maxy = %d\n", win->maxy);
377 __CTRACE(__CTRACE_WINDOW, "makenew: win->maxx = %d\n", win->maxx);
378 __CTRACE(__CTRACE_WINDOW, "makenew: win->begy = %d\n", win->begy);
379 __CTRACE(__CTRACE_WINDOW, "makenew: win->begx = %d\n", win->begx);
380 __CTRACE(__CTRACE_WINDOW, "makenew: win->scr_t = %d\n", win->scr_t);
381 __CTRACE(__CTRACE_WINDOW, "makenew: win->scr_b = %d\n", win->scr_b);
382 return win;
383 }
384
385 void
__swflags(WINDOW * win)386 __swflags(WINDOW *win)
387 {
388 TERMINAL *term = win->screen->term;
389
390 win->flags &= ~(__ENDLINE | __FULLWIN | __SCROLLWIN | __LEAVEOK);
391 if (win->begx + win->maxx == win->screen->COLS &&
392 !(win->flags & __ISPAD))
393 {
394 win->flags |= __ENDLINE;
395 if (win->begx == 0 &&
396 win->maxy == win->screen->LINES &&
397 win->begy == 0)
398 win->flags |= __FULLWIN;
399 if (win->begy + win->maxy == win->screen->LINES &&
400 t_auto_right_margin(term) &&
401 !(t_insert_character(term) != NULL ||
402 t_parm_ich(term) != NULL ||
403 (t_enter_insert_mode(term) != NULL &&
404 t_exit_insert_mode(term) != NULL)))
405 win->flags |= __SCROLLWIN;
406 }
407 }
408
409 /*
410 * is_pad --
411 * Return true if window was created by newpad.
412 */
413 bool
is_pad(const WINDOW * win)414 is_pad(const WINDOW *win)
415 {
416
417 return win->flags & __ISPAD ? true : false;
418 }
419