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[netbsd-mini2440.git] / lib / libcurses / refresh.c
blob5b74142cd5c2cfa393c83632afcd8d101709ce99
1 /* $NetBSD: refresh.c,v 1.70 2008/06/13 03:18:04 yamt 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[] = "@(#)refresh.c 8.7 (Berkeley) 8/13/94";
36 #else
37 __RCSID("$NetBSD: refresh.c,v 1.70 2008/06/13 03:18:04 yamt Exp $");
38 #endif
39 #endif /* not lint */
40
41 #include <stdlib.h>
42 #include <string.h>
43
44 #include "curses.h"
45 #include "curses_private.h"
46
47 static void domvcur(int, int, int, int);
48 static int makech(int);
49 static void quickch(void);
50 static void scrolln(int, int, int, int, int);
51
52 static int _cursesi_wnoutrefresh(SCREEN *, WINDOW *,
53 int, int, int, int, int, int);
54
55 #ifdef HAVE_WCHAR
56 int cellcmp( __LDATA *, __LDATA * );
57 int linecmp( __LDATA *, __LDATA *, size_t );
58 #endif /* HAVE_WCHAR */
59
60 #ifndef _CURSES_USE_MACROS
61
62 /*
63 * refresh --
64 * Make the current screen look like "stdscr" over the area covered by
65 * stdscr.
66 */
67 int
68 refresh(void)
69 {
70 return wrefresh(stdscr);
71 }
72
73 #endif
74
75 /*
76 * wnoutrefresh --
77 * Add the contents of "win" to the virtual window.
78 */
79 int
80 wnoutrefresh(WINDOW *win)
81 {
82 #ifdef DEBUG
83 __CTRACE(__CTRACE_REFRESH, "wnoutrefresh: win %p\n", win);
84 #endif
85
86 return _cursesi_wnoutrefresh(_cursesi_screen, win, 0, 0, win->begy,
87 win->begx, win->maxy, win->maxx);
88 }
89
90 /*
91 * pnoutrefresh --
92 * Add the contents of "pad" to the virtual window.
93 */
94 int
95 pnoutrefresh(WINDOW *pad, int pbegy, int pbegx, int sbegy, int sbegx,
96 int smaxy, int smaxx)
97 {
98 int pmaxy, pmaxx;
99
100 #ifdef DEBUG
101 __CTRACE(__CTRACE_REFRESH, "pnoutrefresh: pad %p, flags 0x%08x\n",
102 pad, pad->flags);
103 __CTRACE(__CTRACE_REFRESH,
104 "pnoutrefresh: (%d, %d), (%d, %d), (%d, %d)\n",
105 pbegy, pbegx, sbegy, sbegx, smaxy, smaxx);
106 #endif
107
108 /* SUS says if these are negative, they should be treated as zero */
109 if (pbegy < 0)
110 pbegy = 0;
111 if (pbegx < 0)
112 pbegx = 0;
113 if (sbegy < 0)
114 sbegy = 0;
115 if (sbegx < 0)
116 sbegx = 0;
117
118 /* Calculate rectangle on pad - used by _cursesi_wnoutrefresh */
119 pmaxy = pbegy + smaxy - sbegy + 1;
120 pmaxx = pbegx + smaxx - sbegx + 1;
121
122 /* Check rectangle fits in pad */
123 if (pmaxy > pad->maxy - pad->begy)
124 pmaxy = pad->maxy - pad->begy;
125 if (pmaxx > pad->maxx - pad->begx)
126 pmaxx = pad->maxx - pad->begx;
127
128 if (smaxy - sbegy < 0 || smaxx - sbegx < 0 )
129 return ERR;
130
131 return _cursesi_wnoutrefresh(_cursesi_screen, pad,
132 pad->begy + pbegy, pad->begx + pbegx, pad->begy + sbegy,
133 pad->begx + sbegx, pmaxy, pmaxx);
134 }
135
136 /*
137 * _cursesi_wnoutrefresh --
138 * Does the grunt work for wnoutrefresh to the given screen.
139 * Copies the part of the window given by the rectangle
140 * (begy, begx) to (maxy, maxx) at screen position (wbegy, wbegx).
141 */
142 int
143 _cursesi_wnoutrefresh(SCREEN *screen, WINDOW *win, int begy, int begx,
144 int wbegy, int wbegx, int maxy, int maxx)
145 {
146
147 short sy, wy, wx, y_off, x_off, mx;
148 __LINE *wlp, *vlp;
149 WINDOW *sub_win, *orig;
150
151 #ifdef DEBUG
152 __CTRACE(__CTRACE_REFRESH, "_wnoutrefresh: win %p, flags 0x%08x\n",
153 win, win->flags);
154 __CTRACE(__CTRACE_REFRESH,
155 "_wnoutrefresh: (%d, %d), (%d, %d), (%d, %d)\n",
156 begy, begx, wbegy, wbegx, maxy, maxx);
157 #endif
158
159 if (screen->curwin)
160 return OK;
161
162 /*
163 * Recurse through any sub-windows, mark as dirty lines on the parent
164 * window that are dirty on the sub-window and clear the dirty flag on
165 * the sub-window.
166 */
167 if (win->orig == 0) {
168 orig = win;
169 for (sub_win = win->nextp; sub_win != win;
170 sub_win = sub_win->nextp) {
171 #ifdef DEBUG
172 __CTRACE(__CTRACE_REFRESH,
173 "wnout_refresh: win %p, sub_win %p\n",
174 orig, sub_win);
175 #endif
176 for (sy = 0; sy < sub_win->maxy; sy++) {
177 if (sub_win->alines[sy]->flags == __ISDIRTY) {
178 orig->alines[sy + sub_win->begy - orig->begy]->flags
179 |= __ISDIRTY;
180 sub_win->alines[sy]->flags
181 &= ~__ISDIRTY;
182 }
183 }
184 }
185 }
186
187 /* Check that cursor position on "win" is valid for "__virtscr" */
188 if (win->cury + wbegy - begy < screen->__virtscr->maxy &&
189 win->cury + wbegy - begy >= 0 && win->cury < maxy - begy)
190 screen->__virtscr->cury = win->cury + wbegy - begy;
191 if (win->curx + wbegx - begx < screen->__virtscr->maxx &&
192 win->curx + wbegx - begx >= 0 && win->curx < maxx - begx)
193 screen->__virtscr->curx = win->curx + wbegx - begx;
194
195 /* Copy the window flags from "win" to "__virtscr" */
196 if (win->flags & __CLEAROK) {
197 if (win->flags & __FULLWIN)
198 screen->__virtscr->flags |= __CLEAROK;
199 win->flags &= ~__CLEAROK;
200 }
201 screen->__virtscr->flags &= ~__LEAVEOK;
202 screen->__virtscr->flags |= win->flags;
203
204 for (wy = begy, y_off = wbegy; wy < maxy &&
205 y_off < screen->__virtscr->maxy; wy++, y_off++) {
206 wlp = win->alines[wy];
207 #ifdef DEBUG
208 __CTRACE(__CTRACE_REFRESH,
209 "_wnoutrefresh: wy %d\tf %d\tl %d\tflags %x\n",
210 wy, *wlp->firstchp, *wlp->lastchp, wlp->flags);
211 #endif
212 if ((wlp->flags & __ISDIRTY) == 0)
213 continue;
214 vlp = screen->__virtscr->alines[y_off];
215
216 if (*wlp->firstchp < maxx + win->ch_off &&
217 *wlp->lastchp >= win->ch_off) {
218 /* Set start column */
219 wx = begx;
220 x_off = wbegx;
221 if (*wlp->firstchp - win->ch_off > 0) {
222 wx += *wlp->firstchp - win->ch_off;
223 x_off += *wlp->firstchp - win->ch_off;
224 }
225 /* Set finish column */
226 mx = maxx;
227 if (mx > *wlp->lastchp - win->ch_off + 1)
228 mx = *wlp->lastchp - win->ch_off + 1;
229 if (x_off + (mx - wx) > __virtscr->maxx)
230 mx -= (x_off + maxx) - __virtscr->maxx;
231 /* Copy line from "win" to "__virtscr". */
232 while (wx < mx) {
233 #ifdef DEBUG
234 __CTRACE(__CTRACE_REFRESH,
235 "_wnoutrefresh: copy from %d, "
236 "%d to %d, %d\n",
237 wy, wx, y_off, x_off);
238 #endif
239 /* Copy character */
240 vlp->line[x_off].ch = wlp->line[wx].ch;
241 /* Copy attributes */
242 vlp->line[x_off].attr = wlp->line[wx].attr;
243 /* Check for nca conflict with colour */
244 if ((vlp->line[x_off].attr & __COLOR) &&
245 (vlp->line[x_off].attr &
246 _cursesi_screen->nca))
247 vlp->line[x_off].attr &= ~__COLOR;
248 #ifdef HAVE_WCHAR
249 if (wlp->line[wx].ch
250 == (wchar_t)btowc((int) win->bch)) {
251 vlp->line[x_off].ch = win->bch;
252 SET_WCOL( vlp->line[x_off], 1 );
253 if (_cursesi_copy_nsp(win->bnsp,
254 &vlp->line[x_off])
255 == ERR)
256 return ERR;
257 }
258 #endif /* HAVE_WCHAR */
259 wx++;
260 x_off++;
261 }
262
263 /* Set flags on "__virtscr" and unset on "win". */
264 if (wlp->flags & __ISPASTEOL)
265 vlp->flags |= __ISPASTEOL;
266 else
267 vlp->flags &= ~__ISPASTEOL;
268 if (wlp->flags & __ISDIRTY)
269 vlp->flags |= __ISDIRTY;
270
271 #ifdef DEBUG
272 __CTRACE(__CTRACE_REFRESH,
273 "win: firstch = %d, lastch = %d\n",
274 *wlp->firstchp, *wlp->lastchp);
275 #endif
276 /* Set change pointers on "__virtscr". */
277 if (*vlp->firstchp >
278 *wlp->firstchp + wbegx - win->ch_off)
279 *vlp->firstchp =
280 *wlp->firstchp + wbegx - win->ch_off;
281 if (*vlp->lastchp <
282 *wlp->lastchp + wbegx - win->ch_off)
283 *vlp->lastchp =
284 *wlp->lastchp + wbegx - win->ch_off;
285 #ifdef DEBUG
286 __CTRACE(__CTRACE_REFRESH,
287 "__virtscr: firstch = %d, lastch = %d\n",
288 *vlp->firstchp, *vlp->lastchp);
289 #endif
290 /*
291 * Unset change pointers only if a window, as a pad
292 * can be displayed again without any of the contents
293 * changing.
294 */
295 if (!(win->flags & __ISPAD)) {
296 /* Set change pointers on "win". */
297 if (*wlp->firstchp >= win->ch_off)
298 *wlp->firstchp = maxx + win->ch_off;
299 if (*wlp->lastchp < maxx + win->ch_off)
300 *wlp->lastchp = win->ch_off;
301 if ((*wlp->lastchp < *wlp->firstchp) ||
302 (*wlp->firstchp >= maxx + win->ch_off) ||
303 (*wlp->lastchp <= win->ch_off)) {
304 #ifdef DEBUG
305 __CTRACE(__CTRACE_REFRESH,
306 "_wnoutrefresh: "
307 "line %d notdirty\n", wy);
308 #endif
309 wlp->flags &= ~__ISDIRTY;
310 }
311 }
312 }
313 }
314 return OK;
315 }
316
317 /*
318 * wrefresh --
319 * Make the current screen look like "win" over the area covered by
320 * win.
321 */
322 int
323 wrefresh(WINDOW *win)
324 {
325 int retval;
326
327 #ifdef DEBUG
328 __CTRACE(__CTRACE_REFRESH, "wrefresh: win %p\n", win);
329 #endif
330
331 _cursesi_screen->curwin = (win == _cursesi_screen->curscr);
332 if (!_cursesi_screen->curwin)
333 retval = _cursesi_wnoutrefresh(_cursesi_screen, win, 0, 0,
334 win->begy, win->begx, win->maxy, win->maxx);
335 else
336 retval = OK;
337 if (retval == OK) {
338 retval = doupdate();
339 if (!(win->flags & __LEAVEOK)) {
340 win->cury = max(0, curscr->cury - win->begy);
341 win->curx = max(0, curscr->curx - win->begx);
342 }
343 }
344 _cursesi_screen->curwin = 0;
345 return(retval);
346 }
347
348 /*
349 * prefresh --
350 * Make the current screen look like "pad" over the area coverd by
351 * the specified area of pad.
352 */
353 int
354 prefresh(WINDOW *pad, int pbegy, int pbegx, int sbegy, int sbegx,
355 int smaxy, int smaxx)
356 {
357 int retval;
358
359 #ifdef DEBUG
360 __CTRACE(__CTRACE_REFRESH, "prefresh: pad %p, flags 0x%08x\n",
361 pad, pad->flags);
362 #endif
363 /* Retain values in case pechochar() is called. */
364 pad->pbegy = pbegy;
365 pad->pbegx = pbegx;
366 pad->sbegy = sbegy;
367 pad->sbegx = sbegx;
368 pad->smaxy = smaxy;
369 pad->smaxx = smaxx;
370
371 /* Use pnoutrefresh() to avoid duplicating code here */
372 retval = pnoutrefresh(pad, pbegy, pbegx, sbegy, sbegx, smaxy, smaxx);
373 if (retval == OK) {
374 retval = doupdate();
375 if (!(pad->flags & __LEAVEOK)) {
376 pad->cury = max(0, curscr->cury - pad->begy);
377 pad->curx = max(0, curscr->curx - pad->begx);
378 }
379 }
380 return(retval);
381 }
382
383 /*
384 * doupdate --
385 * Make the current screen look like the virtual window "__virtscr".
386 */
387 int
388 doupdate(void)
389 {
390 WINDOW *win;
391 __LINE *wlp;
392 short wy;
393 int dnum;
394 #ifdef HAVE_WCHAR
395 __LDATA *lp;
396 nschar_t *np;
397 int x;
398 #endif /* HAVE_WCHAR */
399
400 /* Check if we need to restart ... */
401 if (_cursesi_screen->endwin)
402 __restartwin();
403
404 if (_cursesi_screen->curwin)
405 win = curscr;
406 else
407 win = _cursesi_screen->__virtscr;
408
409 /* Initialize loop parameters. */
410 _cursesi_screen->ly = curscr->cury;
411 _cursesi_screen->lx = curscr->curx;
412 wy = 0;
413
414 if (!_cursesi_screen->curwin) {
415 for (wy = 0; wy < win->maxy; wy++) {
416 wlp = win->alines[wy];
417 if (wlp->flags & __ISDIRTY) {
418 #ifndef HAVE_WCHAR
419 wlp->hash = __hash(wlp->line,
420 (size_t)(win->maxx * __LDATASIZE));
421 #else
422 wlp->hash = 0;
423 for ( x = 0; x < win->maxx; x++ ) {
424 lp = &wlp->line[ x ];
425 wlp->hash = __hash_more( &lp->ch,
426 sizeof( wchar_t ), wlp->hash );
427 wlp->hash = __hash_more( &lp->attr,
428 sizeof( attr_t ), wlp->hash );
429 np = lp->nsp;
430 if (np) {
431 while ( np ) {
432 wlp->hash
433 = __hash_more(
434 &np->ch,
435 sizeof(wchar_t),
436 wlp->hash );
437 np = np->next;
438 }
439 }
440 }
441 #endif /* HAVE_WCHAR */
442 }
443 }
444 }
445
446 if ((win->flags & __CLEAROK) || (curscr->flags & __CLEAROK) ||
447 _cursesi_screen->curwin) {
448 if (curscr->wattr & __COLOR)
449 __unsetattr(0);
450 tputs(__tc_cl, 0, __cputchar);
451 _cursesi_screen->ly = 0;
452 _cursesi_screen->lx = 0;
453 if (!_cursesi_screen->curwin) {
454 curscr->flags &= ~__CLEAROK;
455 curscr->cury = 0;
456 curscr->curx = 0;
457 werase(curscr);
458 }
459 __touchwin(win);
460 win->flags &= ~__CLEAROK;
461 }
462 if (!__CA) {
463 if (win->curx != 0)
464 __cputchar('\n');
465 if (!_cursesi_screen->curwin)
466 werase(curscr);
467 }
468 #ifdef DEBUG
469 __CTRACE(__CTRACE_REFRESH, "doupdate: (%p): curwin = %d\n", win,
470 _cursesi_screen->curwin);
471 __CTRACE(__CTRACE_REFRESH, "doupdate: \tfirstch\tlastch\n");
472 #endif
473
474 if (!_cursesi_screen->curwin) {
475 /*
476 * Invoke quickch() only if more than a quarter of the lines
477 * in the window are dirty.
478 */
479 for (wy = 0, dnum = 0; wy < win->maxy; wy++)
480 if (win->alines[wy]->flags & __ISDIRTY)
481 dnum++;
482 if (!__noqch && dnum > (int) win->maxy / 4)
483 quickch();
484 }
485
486 #ifdef DEBUG
487 {
488 int i, j;
489
490 __CTRACE(__CTRACE_REFRESH,
491 "#####################################\n");
492 __CTRACE(__CTRACE_REFRESH,
493 "stdscr(%p)-curscr(%p)-__virtscr(%p)\n",
494 stdscr, curscr, _cursesi_screen->__virtscr);
495 for (i = 0; i < curscr->maxy; i++) {
496 __CTRACE(__CTRACE_REFRESH, "C: %d:", i);
497 __CTRACE(__CTRACE_REFRESH, " 0x%x \n",
498 curscr->alines[i]->hash);
499 for (j = 0; j < curscr->maxx; j++)
500 __CTRACE(__CTRACE_REFRESH, "%c",
501 curscr->alines[i]->line[j].ch);
502 __CTRACE(__CTRACE_REFRESH, "\n");
503 __CTRACE(__CTRACE_REFRESH, " attr:");
504 for (j = 0; j < curscr->maxx; j++)
505 __CTRACE(__CTRACE_REFRESH, " %x",
506 curscr->alines[i]->line[j].attr);
507 __CTRACE(__CTRACE_REFRESH, "\n");
508 __CTRACE(__CTRACE_REFRESH, "W: %d:", i);
509 __CTRACE(__CTRACE_REFRESH, " 0x%x \n",
510 win->alines[i]->hash);
511 __CTRACE(__CTRACE_REFRESH, " 0x%x ",
512 win->alines[i]->flags);
513 for (j = 0; j < win->maxx; j++)
514 __CTRACE(__CTRACE_REFRESH, "%c",
515 win->alines[i]->line[j].ch);
516 __CTRACE(__CTRACE_REFRESH, "\n");
517 __CTRACE(__CTRACE_REFRESH, " attr:");
518 for (j = 0; j < win->maxx; j++)
519 __CTRACE(__CTRACE_REFRESH, " %x",
520 win->alines[i]->line[j].attr);
521 __CTRACE(__CTRACE_REFRESH, "\n");
522 #ifdef HAVE_WCHAR
523 __CTRACE(__CTRACE_REFRESH, " nsp:");
524 for (j = 0; j < curscr->maxx; j++)
525 __CTRACE(__CTRACE_REFRESH, " %p",
526 win->alines[i]->line[j].nsp);
527 __CTRACE(__CTRACE_REFRESH, "\n");
528 __CTRACE(__CTRACE_REFRESH, " bnsp:");
529 for (j = 0; j < curscr->maxx; j++)
530 __CTRACE(__CTRACE_REFRESH, " %p",
531 win->bnsp);
532 __CTRACE(__CTRACE_REFRESH, "\n");
533 #endif /* HAVE_WCHAR */
534 }
535 }
536 #endif /* DEBUG */
537
538 for (wy = 0; wy < win->maxy; wy++) {
539 wlp = win->alines[wy];
540 /* XXX: remove this debug */
541 #ifdef DEBUG
542 __CTRACE(__CTRACE_REFRESH,
543 "doupdate: wy %d\tf: %d\tl:%d\tflags %x\n",
544 wy, *wlp->firstchp, *wlp->lastchp, wlp->flags);
545 #endif /* DEBUG */
546 if (!_cursesi_screen->curwin)
547 curscr->alines[wy]->hash = wlp->hash;
548 if (wlp->flags & __ISDIRTY) {
549 #ifdef DEBUG
550 __CTRACE(__CTRACE_REFRESH,
551 "doupdate: [ISDIRTY]wy:%d\tf:%d\tl:%d\n", wy,
552 *wlp->firstchp, *wlp->lastchp);
553 #endif /* DEBUG */
554 if (makech(wy) == ERR)
555 return (ERR);
556 else {
557 if (*wlp->firstchp >= 0)
558 *wlp->firstchp = win->maxx;
559 if (*wlp->lastchp < win->maxx)
560 *wlp->lastchp = 0;
561 if (*wlp->lastchp < *wlp->firstchp) {
562 #ifdef DEBUG
563 __CTRACE(__CTRACE_REFRESH,
564 "doupdate: line %d notdirty\n", wy);
565 #endif /* DEBUG */
566 wlp->flags &= ~__ISDIRTY;
567 }
568 }
569
570 }
571 #ifdef DEBUG
572 __CTRACE(__CTRACE_REFRESH, "\t%d\t%d\n",
573 *wlp->firstchp, *wlp->lastchp);
574 #endif /* DEBUG */
575 }
576
577 #ifdef DEBUG
578 __CTRACE(__CTRACE_REFRESH, "doupdate: ly=%d, lx=%d\n",
579 _cursesi_screen->ly, _cursesi_screen->lx);
580 #endif /* DEBUG */
581
582 if (_cursesi_screen->curwin)
583 domvcur(_cursesi_screen->ly, _cursesi_screen->lx,
584 win->cury, win->curx);
585 else {
586 if (win->flags & __LEAVEOK) {
587 curscr->cury = _cursesi_screen->ly;
588 curscr->curx = _cursesi_screen->lx;
589 } else {
590 domvcur(_cursesi_screen->ly, _cursesi_screen->lx,
591 win->cury, win->curx);
592 curscr->cury = win->cury;
593 curscr->curx = win->curx;
594 }
595 }
596
597 /* Don't leave the screen with attributes set. */
598 __unsetattr(0);
599 #ifdef DEBUG
600 #ifdef HAVE_WCHAR
601 {
602 int i, j;
603
604 __CTRACE(__CTRACE_REFRESH,
605 "***********after*****************\n");
606 __CTRACE(__CTRACE_REFRESH,
607 "stdscr(%p)-curscr(%p)-__virtscr(%p)\n",
608 stdscr, curscr, _cursesi_screen->__virtscr);
609 for (i = 0; i < curscr->maxy; i++) {
610 for (j = 0; j < curscr->maxx; j++)
611 __CTRACE(__CTRACE_REFRESH,
612 "[%d,%d](%x,%x,%p)-(%x,%x,%p)\n",
613 i, j,
614 curscr->alines[i]->line[j].ch,
615 curscr->alines[i]->line[j].attr,
616 curscr->alines[i]->line[j].nsp,
617 _cursesi_screen->__virtscr->alines[i]->line[j].ch,
618 _cursesi_screen->__virtscr->alines[i]->line[j].attr,
619 _cursesi_screen->__virtscr->alines[i]->line[j].nsp);
620 }
621 }
622 #endif /* HAVE_WCHAR */
623 #endif /* DEBUG */
624 return fflush(_cursesi_screen->outfd) == EOF ? ERR : OK;
625 }
626
627 /*
628 * makech --
629 * Make a change on the screen.
630 */
631 static int
632 makech(int wy)
633 {
634 WINDOW *win;
635 static __LDATA blank;
636 __LDATA *nsp, *csp, *cp, *cep;
637 size_t clsp, nlsp; /* Last space in lines. */
638 int lch, wx;
639 char *ce;
640 attr_t lspc; /* Last space colour */
641 attr_t off, on;
642
643 #ifdef __GNUC__
644 nlsp = lspc = 0; /* XXX gcc -Wuninitialized */
645 #endif
646 if (_cursesi_screen->curwin)
647 win = curscr;
648 else
649 win = __virtscr;
650 #ifdef HAVE_WCHAR
651 blank.ch = ( wchar_t )btowc(( int ) win->bch );
652 blank.attr = 0;
653 if (_cursesi_copy_nsp(win->bnsp, &blank) == ERR)
654 return ERR;
655 SET_WCOL( blank, 1 );
656 #endif /* HAVE_WCHAR */
657 #ifdef DEBUG
658 #if HAVE_WCHAR
659 {
660 int x;
661 __LDATA *lp, *vlp;
662
663 __CTRACE(__CTRACE_REFRESH,
664 "[makech-before]wy=%d,curscr(%p)-__virtscr(%p)\n",
665 wy, curscr, __virtscr);
666 for (x = 0; x < curscr->maxx; x++) {
667 lp = &curscr->alines[wy]->line[x];
668 vlp = &__virtscr->alines[wy]->line[x];
669 __CTRACE(__CTRACE_REFRESH,
670 "[%d,%d](%x,%x,%x,%x,%p)-"
671 "(%x,%x,%x,%x,%p)\n",
672 wy, x, lp->ch, lp->attr,
673 win->bch, win->battr, lp->nsp,
674 vlp->ch, vlp->attr,
675 win->bch, win->battr, vlp->nsp);
676 }
677 }
678 #endif /* HAVE_WCHAR */
679 #endif /* DEBUG */
680 /* Is the cursor still on the end of the last line? */
681 if (wy > 0 && curscr->alines[wy - 1]->flags & __ISPASTEOL) {
682 domvcur(_cursesi_screen->ly, _cursesi_screen->lx,
683 _cursesi_screen->ly + 1, 0);
684 _cursesi_screen->ly++;
685 _cursesi_screen->lx = 0;
686 }
687 wx = *win->alines[wy]->firstchp;
688 if (wx < 0)
689 wx = 0;
690 else
691 if (wx >= win->maxx)
692 return (OK);
693 lch = *win->alines[wy]->lastchp;
694 if (lch < 0)
695 return (OK);
696 else
697 if (lch >= (int) win->maxx)
698 lch = win->maxx - 1;
699
700 if (_cursesi_screen->curwin) {
701 csp = &blank;
702 #ifdef DEBUG
703 __CTRACE(__CTRACE_REFRESH, "makech: csp is blank\n");
704 #endif /* DEBUG */
705 } else {
706 csp = &curscr->alines[wy]->line[wx];
707 #ifdef DEBUG
708 __CTRACE(__CTRACE_REFRESH,
709 "makech: csp is on curscr:(%d,%d)\n", wy, wx);
710 #endif /* DEBUG */
711 }
712
713 nsp = &win->alines[wy]->line[wx];
714 #ifdef DEBUG
715 if ( _cursesi_screen->curwin )
716 __CTRACE(__CTRACE_REFRESH,
717 "makech: nsp is at curscr:(%d,%d)\n", wy, wx);
718 else
719 __CTRACE(__CTRACE_REFRESH,
720 "makech: nsp is at __virtscr:(%d,%d)\n", wy, wx);
721 #endif /* DEBUG */
722 if (__tc_ce && !_cursesi_screen->curwin) {
723 cp = &win->alines[wy]->line[win->maxx - 1];
724 lspc = cp->attr & __COLOR;
725 #ifndef HAVE_WCHAR
726 while (cp->ch == ' ' && cp->attr == lspc) /* XXX */
727 if (cp-- <= win->alines[wy]->line)
728 break;
729 #else
730 while (cp->ch == ( wchar_t )btowc(( int )' ' )
731 && ( cp->attr & WA_ATTRIBUTES ) == lspc)
732 if (cp-- <= win->alines[wy]->line)
733 break;
734 #endif /* HAVE_WCHAR */
735 if (win->alines[wy]->line > cp)
736 nlsp = 0;
737 else
738 nlsp = cp - win->alines[wy]->line;
739 }
740 if (!_cursesi_screen->curwin)
741 ce = __tc_ce;
742 else
743 ce = NULL;
744
745 while (wx <= lch) {
746 #ifdef DEBUG
747 __CTRACE(__CTRACE_REFRESH, "makech: wx=%d,lch=%d\n", wx, lch);
748 #endif /* DEBUG */
749 #ifndef HAVE_WCHAR
750 if (memcmp(nsp, csp, sizeof(__LDATA)) == 0) {
751 if (wx <= lch) {
752 while (wx <= lch &&
753 memcmp(nsp, csp, sizeof(__LDATA)) == 0) {
754 nsp++;
755 if (!_cursesi_screen->curwin)
756 ++csp;
757 ++wx;
758 }
759 continue;
760 }
761 break;
762 }
763 #else
764 #ifdef DEBUG
765 __CTRACE(__CTRACE_REFRESH, "makech: nsp=(%x,%x,%x,%x,%p)\n",
766 nsp->ch, nsp->attr, win->bch, win->battr, nsp->nsp);
767 __CTRACE(__CTRACE_REFRESH, "makech: csp=(%x,%x,%x,%x,%p)\n",
768 csp->ch, csp->attr, win->bch, win->battr, csp->nsp);
769 #endif /* DEBUG */
770 if (((nsp->attr & __WCWIDTH) != __WCWIDTH) &&
771 cellcmp(nsp, csp)) {
772 if (wx <= lch) {
773 while (wx <= lch && cellcmp( csp, nsp )) {
774 nsp++;
775 if (!_cursesi_screen->curwin)
776 ++csp;
777 ++wx;
778 }
779 continue;
780 }
781 break;
782 }
783 #endif /* HAVE_WCHAR */
784 domvcur(_cursesi_screen->ly, _cursesi_screen->lx, wy, wx);
785
786 #ifdef DEBUG
787 __CTRACE(__CTRACE_REFRESH, "makech: 1: wx = %d, ly= %d, "
788 "lx = %d, newy = %d, newx = %d\n",
789 wx, _cursesi_screen->ly, _cursesi_screen->lx, wy, wx);
790 #endif
791 _cursesi_screen->ly = wy;
792 _cursesi_screen->lx = wx;
793 #ifndef HAVE_WCHAR
794 while (wx <= lch && memcmp(nsp, csp, sizeof(__LDATA)) != 0) {
795 if (ce != NULL &&
796 wx >= nlsp && nsp->ch == ' ' && nsp->attr == lspc) {
797 #else
798 while (!cellcmp(nsp, csp) && wx <= lch) {
799 if (ce != NULL && wx >= nlsp
800 && nsp->ch == (wchar_t)btowc((int)' ') /* XXX */
801 && (nsp->attr & WA_ATTRIBUTES) == lspc) {
802
803 #endif
804 /* Check for clear to end-of-line. */
805 cep = &curscr->alines[wy]->line[win->maxx - 1];
806 #ifndef HAVE_WCHAR
807 while (cep->ch == ' ' && cep->attr == lspc) /* XXX */
808 #else
809 while (cep->ch == (wchar_t)btowc((int)' ')
810 && (cep->attr & WA_ATTRIBUTES) == lspc)
811 #endif /* HAVE_WCHAR */
812 if (cep-- <= csp)
813 break;
814 clsp = cep - curscr->alines[wy]->line -
815 win->begx * __LDATASIZE;
816 #ifdef DEBUG
817 __CTRACE(__CTRACE_REFRESH,
818 "makech: clsp = %zu, nlsp = %zu\n",
819 clsp, nlsp);
820 #endif
821 if (((clsp - nlsp >= strlen(__tc_ce) &&
822 clsp < win->maxx * __LDATASIZE) ||
823 wy == win->maxy - 1) &&
824 (!(lspc & __COLOR) ||
825 ((lspc & __COLOR) && __tc_ut))) {
826 __unsetattr(0);
827 if (__using_color &&
828 ((lspc & __COLOR) !=
829 (curscr->wattr & __COLOR)))
830 __set_color(curscr, lspc &
831 __COLOR);
832 tputs(__tc_ce, 0, __cputchar);
833 _cursesi_screen->lx = wx + win->begx;
834 while (wx++ <= clsp) {
835 csp->attr = lspc;
836 #ifndef HAVE_WCHAR
837 csp->ch = ' '; /* XXX */
838 #else
839 csp->ch = (wchar_t)btowc((int)' ');
840 SET_WCOL( *csp, 1 );
841 #endif /* HAVE_WCHAR */
842 csp++;
843 }
844 return (OK);
845 }
846 ce = NULL;
847 }
848
849 #ifdef DEBUG
850 __CTRACE(__CTRACE_REFRESH,
851 "makech: have attr %08x, need attr %08x\n",
852 curscr->wattr & WA_ATTRIBUTES,
853 nsp->attr & WA_ATTRIBUTES);
854 #endif
855
856 off = (~nsp->attr & curscr->wattr)
857 #ifndef HAVE_WCHAR
858 & __ATTRIBUTES
859 #else
860 & WA_ATTRIBUTES
861 #endif
862 ;
863
864 /*
865 * Unset attributes as appropriate. Unset first
866 * so that the relevant attributes can be reset
867 * (because 'me' unsets 'mb', 'md', 'mh', 'mk',
868 * 'mp' and 'mr'). Check to see if we also turn off
869 * standout, attributes and colour.
870 */
871 if (off & __TERMATTR && __tc_me != NULL) {
872 tputs(__tc_me, 0, __cputchar);
873 curscr->wattr &= __mask_me;
874 off &= __mask_me;
875 }
876
877 /*
878 * Exit underscore mode if appropriate.
879 * Check to see if we also turn off standout,
880 * attributes and colour.
881 */
882 if (off & __UNDERSCORE && __tc_ue != NULL) {
883 tputs(__tc_ue, 0, __cputchar);
884 curscr->wattr &= __mask_ue;
885 off &= __mask_ue;
886 }
887
888 /*
889 * Exit standout mode as appropriate.
890 * Check to see if we also turn off underscore,
891 * attributes and colour.
892 * XXX
893 * Should use uc if so/se not available.
894 */
895 if (off & __STANDOUT && __tc_se != NULL) {
896 tputs(__tc_se, 0, __cputchar);
897 curscr->wattr &= __mask_se;
898 off &= __mask_se;
899 }
900
901 if (off & __ALTCHARSET && __tc_ae != NULL) {
902 tputs(__tc_ae, 0, __cputchar);
903 curscr->wattr &= ~__ALTCHARSET;
904 }
905
906 /* Set/change colour as appropriate. */
907 if (__using_color)
908 __set_color(curscr, nsp->attr & __COLOR);
909
910 on = (nsp->attr & ~curscr->wattr)
911 #ifndef HAVE_WCHAR
912 & __ATTRIBUTES
913 #else
914 & WA_ATTRIBUTES
915 #endif
916 ;
917
918 /*
919 * Enter standout mode if appropriate.
920 */
921 if (on & __STANDOUT && __tc_so != NULL && __tc_se
922 != NULL) {
923 tputs(__tc_so, 0, __cputchar);
924 curscr->wattr |= __STANDOUT;
925 }
926
927 /*
928 * Enter underscore mode if appropriate.
929 * XXX
930 * Should use uc if us/ue not available.
931 */
932 if (on & __UNDERSCORE && __tc_us != NULL &&
933 __tc_ue != NULL) {
934 tputs(__tc_us, 0, __cputchar);
935 curscr->wattr |= __UNDERSCORE;
936 }
937
938 /*
939 * Set other attributes as appropriate.
940 */
941 if (__tc_me != NULL) {
942 if (on & __BLINK && __tc_mb != NULL) {
943 tputs(__tc_mb, 0, __cputchar);
944 curscr->wattr |= __BLINK;
945 }
946 if (on & __BOLD && __tc_md != NULL) {
947 tputs(__tc_md, 0, __cputchar);
948 curscr->wattr |= __BOLD;
949 }
950 if (on & __DIM && __tc_mh != NULL) {
951 tputs(__tc_mh, 0, __cputchar);
952 curscr->wattr |= __DIM;
953 }
954 if (on & __BLANK && __tc_mk != NULL) {
955 tputs(__tc_mk, 0, __cputchar);
956 curscr->wattr |= __BLANK;
957 }
958 if (on & __PROTECT && __tc_mp != NULL) {
959 tputs(__tc_mp, 0, __cputchar);
960 curscr->wattr |= __PROTECT;
961 }
962 if (on & __REVERSE && __tc_mr != NULL) {
963 tputs(__tc_mr, 0, __cputchar);
964 curscr->wattr |= __REVERSE;
965 }
966 #ifdef HAVE_WCHAR
967 if (on & WA_TOP && __tc_Xt != NULL) {
968 tputs(__tc_Xt, 0, __cputchar);
969 curscr->wattr |= WA_TOP;
970 }
971 if (on & WA_LOW && __tc_Xo != NULL) {
972 tputs(__tc_Xo, 0, __cputchar);
973 curscr->wattr |= WA_LOW;
974 }
975 if (on & WA_LEFT && __tc_Xl != NULL) {
976 tputs(__tc_Xl, 0, __cputchar);
977 curscr->wattr |= WA_LEFT;
978 }
979 if (on & WA_RIGHT && __tc_Xl != NULL) {
980 tputs(__tc_Xl, 0, __cputchar);
981 curscr->wattr |= WA_RIGHT;
982 }
983 if (on & WA_HORIZONTAL && __tc_Xh != NULL) {
984 tputs(__tc_Xh, 0, __cputchar);
985 curscr->wattr |= WA_HORIZONTAL;
986 }
987 if (on & WA_VERTICAL && __tc_Xv != NULL) {
988 tputs(__tc_Xv, 0, __cputchar);
989 curscr->wattr |= WA_VERTICAL;
990 }
991 #endif /* HAVE_WCHAR */
992 }
993
994 /* Enter/exit altcharset mode as appropriate. */
995 if (on & __ALTCHARSET && __tc_as != NULL &&
996 __tc_ae != NULL) {
997 tputs(__tc_as, 0, __cputchar);
998 curscr->wattr |= __ALTCHARSET;
999 }
1000
1001 wx++;
1002 if (wx >= win->maxx &&
1003 wy == win->maxy - 1 && !_cursesi_screen->curwin) {
1004 if (win->flags & __SCROLLOK) {
1005 if (win->flags & __ENDLINE)
1006 __unsetattr(1);
1007 if (!(win->flags & __SCROLLWIN)) {
1008 if (!_cursesi_screen->curwin) {
1009 csp->attr = nsp->attr;
1010 csp->ch = nsp->ch;
1011 #ifdef HAVE_WCHAR
1012 if (_cursesi_copy_nsp(nsp->nsp, csp) == ERR)
1013 return ERR;
1014 #endif /* HAVE_WCHAR */
1015 }
1016 #ifndef HAVE_WCHAR
1017 __cputchar((int) nsp->ch);
1018 #else
1019 if ( WCOL( *nsp ) > 0 ) {
1020 __cputwchar((int)nsp->ch);
1021 #ifdef DEBUG
1022 __CTRACE(__CTRACE_REFRESH,
1023 "makech: (%d,%d)putwchar(0x%x)\n",
1024 wy, wx - 1,
1025 nsp->ch );
1026 #endif /* DEBUG */
1027 /*
1028 * Output non-spacing
1029 * characters for the
1030 * cell.
1031 */
1032 __cursesi_putnsp(nsp->nsp,
1033 wy, wx);
1034
1035 }
1036 #endif /* HAVE_WCHAR */
1037 }
1038 if (wx < curscr->maxx) {
1039 domvcur(_cursesi_screen->ly, wx,
1040 (int) (win->maxy - 1),
1041 (int) (win->maxx - 1));
1042 }
1043 _cursesi_screen->ly = win->maxy - 1;
1044 _cursesi_screen->lx = win->maxx - 1;
1045 return (OK);
1046 }
1047 }
1048 if (wx < win->maxx || wy < win->maxy - 1 ||
1049 !(win->flags & __SCROLLWIN)) {
1050 if (!_cursesi_screen->curwin) {
1051 csp->attr = nsp->attr;
1052 csp->ch = nsp->ch;
1053 #ifdef HAVE_WCHAR
1054 if (_cursesi_copy_nsp(nsp->nsp,
1055 csp) == ERR)
1056 return ERR;
1057 #endif /* HAVE_WCHAR */
1058 csp++;
1059 }
1060 #ifndef HAVE_WCHAR
1061 __cputchar((int) nsp->ch);
1062 #ifdef DEBUG
1063 __CTRACE(__CTRACE_REFRESH,
1064 "makech: putchar(%c)\n", nsp->ch & 0177);
1065 #endif
1066 #else
1067 if (WCOL(*nsp) > 0) {
1068 __cputwchar((int) nsp->ch);
1069 #ifdef DEBUG
1070 __CTRACE(__CTRACE_REFRESH,
1071 "makech:(%d,%d) putwchar(%x)\n",
1072 wy, wx - 1, nsp->ch);
1073 __cursesi_putnsp(nsp->nsp, wy, wx);
1074 #endif /* DEBUG */
1075 }
1076 #endif /* HAVE_WCHAR */
1077 }
1078 if (__tc_uc && ((nsp->attr & __STANDOUT) ||
1079 (nsp->attr & __UNDERSCORE))) {
1080 __cputchar('\b');
1081 tputs(__tc_uc, 0, __cputchar);
1082 }
1083 nsp++;
1084 #ifdef DEBUG
1085 __CTRACE(__CTRACE_REFRESH,
1086 "makech: 2: wx = %d, lx = %d\n",
1087 wx, _cursesi_screen->lx);
1088 #endif
1089 }
1090 if (_cursesi_screen->lx == wx) /* If no change. */
1091 break;
1092 _cursesi_screen->lx = wx;
1093 if (_cursesi_screen->lx >= COLS && __tc_am)
1094 _cursesi_screen->lx = COLS - 1;
1095 else
1096 if (wx >= win->maxx) {
1097 domvcur(_cursesi_screen->ly,
1098 _cursesi_screen->lx,
1099 _cursesi_screen->ly,
1100 (int) (win->maxx - 1));
1101 _cursesi_screen->lx = win->maxx - 1;
1102 }
1103 #ifdef DEBUG
1104 __CTRACE(__CTRACE_REFRESH, "makech: 3: wx = %d, lx = %d\n",
1105 wx, _cursesi_screen->lx);
1106 #endif
1107 }
1108 #ifdef DEBUG
1109 #if HAVE_WCHAR
1110 {
1111 int x;
1112 __LDATA *lp, *vlp;
1113
1114 __CTRACE(__CTRACE_REFRESH,
1115 "makech-after: curscr(%p)-__virtscr(%p)\n",
1116 curscr, __virtscr );
1117 for (x = 0; x < curscr->maxx; x++) {
1118 lp = &curscr->alines[wy]->line[x];
1119 vlp = &__virtscr->alines[wy]->line[x];
1120 __CTRACE(__CTRACE_REFRESH,
1121 "[%d,%d](%x,%x,%x,%x,%p)-"
1122 "(%x,%x,%x,%x,%p)\n",
1123 wy, x, lp->ch, lp->attr,
1124 win->bch, win->battr, lp->nsp,
1125 vlp->ch, vlp->attr,
1126 win->bch, win->battr, vlp->nsp);
1127 }
1128 }
1129 #endif /* HAVE_WCHAR */
1130 #endif /* DEBUG */
1131
1132 return (OK);
1133 }
1134
1135 /*
1136 * domvcur --
1137 * Do a mvcur, leaving attributes if necessary.
1138 */
1139 static void
1140 domvcur(oy, ox, ny, nx)
1141 int oy, ox, ny, nx;
1142 {
1143 #ifdef DEBUG
1144 __CTRACE(__CTRACE_REFRESH, "domvcur: (%x,%d)=>(%d,%d)\n",
1145 oy, ox, ny, nx );
1146 #endif /* DEBUG */
1147 __unsetattr(1);
1148 if ( oy == ny && ox == nx )
1149 return;
1150 __mvcur(oy, ox, ny, nx, 1);
1151 }
1152
1153 /*
1154 * Quickch() attempts to detect a pattern in the change of the window
1155 * in order to optimize the change, e.g., scroll n lines as opposed to
1156 * repainting the screen line by line.
1157 */
1158
1159 static __LDATA buf[128];
1160 static u_int last_hash;
1161 static size_t last_hash_len;
1162 #define BLANKSIZE (sizeof(buf) / sizeof(buf[0]))
1163
1164 static void
1165 quickch(void)
1166 {
1167 #define THRESH (int) __virtscr->maxy / 4
1168
1169 __LINE *clp, *tmp1, *tmp2;
1170 int bsize, curs, curw, starts, startw, i, j;
1171 int n, target, cur_period, bot, top, sc_region;
1172 u_int blank_hash;
1173 attr_t bcolor;
1174
1175 #ifdef __GNUC__
1176 curs = curw = starts = startw = 0; /* XXX gcc -Wuninitialized */
1177 #endif
1178 /*
1179 * Find how many lines from the top of the screen are unchanged.
1180 */
1181 for (top = 0; top < __virtscr->maxy; top++)
1182 #ifndef HAVE_WCHAR
1183 if (__virtscr->alines[top]->flags & __ISDIRTY &&
1184 (__virtscr->alines[top]->hash != curscr->alines[top]->hash ||
1185 memcmp(__virtscr->alines[top]->line,
1186 curscr->alines[top]->line,
1187 (size_t) __virtscr->maxx * __LDATASIZE)
1188 != 0))
1189 break;
1190 #else
1191 if (__virtscr->alines[top]->flags & __ISDIRTY &&
1192 (__virtscr->alines[top]->hash != curscr->alines[top]->hash ||
1193 !linecmp(__virtscr->alines[top]->line,
1194 curscr->alines[top]->line,
1195 (size_t) __virtscr->maxx )))
1196 break;
1197 #endif /* HAVE_WCHAR */
1198 else
1199 __virtscr->alines[top]->flags &= ~__ISDIRTY;
1200 /*
1201 * Find how many lines from bottom of screen are unchanged.
1202 */
1203 for (bot = __virtscr->maxy - 1; bot >= 0; bot--)
1204 #ifndef HAVE_WCHAR
1205 if (__virtscr->alines[bot]->flags & __ISDIRTY &&
1206 (__virtscr->alines[bot]->hash != curscr->alines[bot]->hash ||
1207 memcmp(__virtscr->alines[bot]->line,
1208 curscr->alines[bot]->line,
1209 (size_t) __virtscr->maxx * __LDATASIZE)
1210 != 0))
1211 break;
1212 #else
1213 if (__virtscr->alines[bot]->flags & __ISDIRTY &&
1214 (__virtscr->alines[bot]->hash != curscr->alines[bot]->hash ||
1215 !linecmp(__virtscr->alines[bot]->line,
1216 curscr->alines[bot]->line,
1217 (size_t) __virtscr->maxx )))
1218 break;
1219 #endif /* HAVE_WCHAR */
1220 else
1221 __virtscr->alines[bot]->flags &= ~__ISDIRTY;
1222
1223 /*
1224 * Work round an xterm bug where inserting lines causes all the
1225 * inserted lines to be covered with the background colour we
1226 * set on the first line (even if we unset it for subsequent
1227 * lines).
1228 */
1229 bcolor = __virtscr->alines[min(top,
1230 __virtscr->maxy - 1)]->line[0].attr & __COLOR;
1231 for (i = top + 1, j = 0; i < bot; i++) {
1232 if ((__virtscr->alines[i]->line[0].attr & __COLOR) != bcolor) {
1233 bcolor = __virtscr->alines[i]->line[__virtscr->maxx].
1234 attr & __COLOR;
1235 j = i - top;
1236 } else
1237 break;
1238 }
1239 top += j;
1240
1241 #ifdef NO_JERKINESS
1242 /*
1243 * If we have a bottom unchanged region return. Scrolling the
1244 * bottom region up and then back down causes a screen jitter.
1245 * This will increase the number of characters sent to the screen
1246 * but it looks better.
1247 */
1248 if (bot < __virtscr->maxy - 1)
1249 return;
1250 #endif /* NO_JERKINESS */
1251
1252 /*
1253 * Search for the largest block of text not changed.
1254 * Invariants of the loop:
1255 * - Startw is the index of the beginning of the examined block in
1256 * __virtscr.
1257 * - Starts is the index of the beginning of the examined block in
1258 * curscr.
1259 * - Curw is the index of one past the end of the exmined block in
1260 * __virtscr.
1261 * - Curs is the index of one past the end of the exmined block in
1262 * curscr.
1263 * - bsize is the current size of the examined block.
1264 */
1265
1266 for (bsize = bot - top; bsize >= THRESH; bsize--) {
1267 for (startw = top; startw <= bot - bsize; startw++)
1268 for (starts = top; starts <= bot - bsize;
1269 starts++) {
1270 for (curw = startw, curs = starts;
1271 curs < starts + bsize; curw++, curs++)
1272 if (__virtscr->alines[curw]->hash !=
1273 curscr->alines[curs]->hash)
1274 break;
1275 if (curs != starts + bsize)
1276 continue;
1277 for (curw = startw, curs = starts;
1278 curs < starts + bsize; curw++, curs++)
1279 #ifndef HAVE_WCHAR
1280 if (memcmp(__virtscr->alines[curw]->line,
1281 curscr->alines[curs]->line,
1282 (size_t) __virtscr->maxx *
1283 __LDATASIZE) != 0)
1284 break;
1285 #else
1286 if (!linecmp(__virtscr->alines[curw]->line,
1287 curscr->alines[curs]->line,
1288 (size_t) __virtscr->maxx))
1289 break;
1290 #endif /* HAVE_WCHAR */
1291 if (curs == starts + bsize)
1292 goto done;
1293 }
1294 }
1295 done:
1296
1297 /* Did not find anything */
1298 if (bsize < THRESH)
1299 return;
1300
1301 #ifdef DEBUG
1302 __CTRACE(__CTRACE_REFRESH, "quickch:bsize=%d, starts=%d, startw=%d, "
1303 "curw=%d, curs=%d, top=%d, bot=%d\n",
1304 bsize, starts, startw, curw, curs, top, bot);
1305 #endif
1306
1307 /*
1308 * Make sure that there is no overlap between the bottom and top
1309 * regions and the middle scrolled block.
1310 */
1311 if (bot < curs)
1312 bot = curs - 1;
1313 if (top > starts)
1314 top = starts;
1315
1316 n = startw - starts;
1317
1318 #ifdef DEBUG
1319 __CTRACE(__CTRACE_REFRESH, "#####################################\n");
1320 for (i = 0; i < curscr->maxy; i++) {
1321 __CTRACE(__CTRACE_REFRESH, "C: %d:", i);
1322 __CTRACE(__CTRACE_REFRESH, " 0x%x \n", curscr->alines[i]->hash);
1323 for (j = 0; j < curscr->maxx; j++)
1324 __CTRACE(__CTRACE_REFRESH, "%c",
1325 curscr->alines[i]->line[j].ch);
1326 __CTRACE(__CTRACE_REFRESH, "\n");
1327 __CTRACE(__CTRACE_REFRESH, " attr:");
1328 for (j = 0; j < curscr->maxx; j++)
1329 __CTRACE(__CTRACE_REFRESH, " %x",
1330 curscr->alines[i]->line[j].attr);
1331 __CTRACE(__CTRACE_REFRESH, "\n");
1332 __CTRACE(__CTRACE_REFRESH, "W: %d:", i);
1333 __CTRACE(__CTRACE_REFRESH, " 0x%x \n",
1334 __virtscr->alines[i]->hash);
1335 __CTRACE(__CTRACE_REFRESH, " 0x%x ",
1336 __virtscr->alines[i]->flags);
1337 for (j = 0; j < __virtscr->maxx; j++)
1338 __CTRACE(__CTRACE_REFRESH, "%c",
1339 __virtscr->alines[i]->line[j].ch);
1340 __CTRACE(__CTRACE_REFRESH, "\n");
1341 __CTRACE(__CTRACE_REFRESH, " attr:");
1342 for (j = 0; j < __virtscr->maxx; j++)
1343 __CTRACE(__CTRACE_REFRESH, " %x",
1344 __virtscr->alines[i]->line[j].attr);
1345 __CTRACE(__CTRACE_REFRESH, "\n");
1346 }
1347 #endif
1348
1349 #ifndef HAVE_WCHAR
1350 if (buf[0].ch != ' ') {
1351 for (i = 0; i < BLANKSIZE; i++) {
1352 buf[i].ch = ' ';
1353 buf[i].attr = 0;
1354 }
1355 }
1356 #else
1357 if (buf[0].ch != ( wchar_t )btowc(( int ) curscr->bch )) {
1358 for (i = 0; i < BLANKSIZE; i++) {
1359 buf[i].ch = ( wchar_t )btowc(( int ) curscr->bch );
1360 if (_cursesi_copy_nsp(curscr->bnsp, &buf[i]) == ERR)
1361 return;
1362 buf[i].attr = 0;
1363 SET_WCOL( buf[ i ], 1 );
1364 }
1365 }
1366 #endif /* HAVE_WCHAR */
1367
1368 if (__virtscr->maxx != last_hash_len) {
1369 blank_hash = 0;
1370 for (i = __virtscr->maxx; i > BLANKSIZE; i -= BLANKSIZE) {
1371 blank_hash = __hash_more(buf, sizeof(buf), blank_hash);
1372 }
1373 blank_hash = __hash_more((char *)(void *)buf,
1374 i * sizeof(buf[0]), blank_hash);
1375 /* cache result in static data - screen width doesn't change often */
1376 last_hash_len = __virtscr->maxx;
1377 last_hash = blank_hash;
1378 } else
1379 blank_hash = last_hash;
1380
1381 /*
1382 * Perform the rotation to maintain the consistency of curscr.
1383 * This is hairy since we are doing an *in place* rotation.
1384 * Invariants of the loop:
1385 * - I is the index of the current line.
1386 * - Target is the index of the target of line i.
1387 * - Tmp1 points to current line (i).
1388 * - Tmp2 and points to target line (target);
1389 * - Cur_period is the index of the end of the current period.
1390 * (see below).
1391 *
1392 * There are 2 major issues here that make this rotation non-trivial:
1393 * 1. Scrolling in a scrolling region bounded by the top
1394 * and bottom regions determined (whose size is sc_region).
1395 * 2. As a result of the use of the mod function, there may be a
1396 * period introduced, i.e., 2 maps to 4, 4 to 6, n-2 to 0, and
1397 * 0 to 2, which then causes all odd lines not to be rotated.
1398 * To remedy this, an index of the end ( = beginning) of the
1399 * current 'period' is kept, cur_period, and when it is reached,
1400 * the next period is started from cur_period + 1 which is
1401 * guaranteed not to have been reached since that would mean that
1402 * all records would have been reached. (think about it...).
1403 *
1404 * Lines in the rotation can have 3 attributes which are marked on the
1405 * line so that curscr is consistent with the visual screen.
1406 * 1. Not dirty -- lines inside the scrolled block, top region or
1407 * bottom region.
1408 * 2. Blank lines -- lines in the differential of the scrolling
1409 * region adjacent to top and bot regions
1410 * depending on scrolling direction.
1411 * 3. Dirty line -- all other lines are marked dirty.
1412 */
1413 sc_region = bot - top + 1;
1414 i = top;
1415 tmp1 = curscr->alines[top];
1416 cur_period = top;
1417 for (j = top; j <= bot; j++) {
1418 target = (i - top + n + sc_region) % sc_region + top;
1419 tmp2 = curscr->alines[target];
1420 curscr->alines[target] = tmp1;
1421 /* Mark block as clean and blank out scrolled lines. */
1422 clp = curscr->alines[target];
1423 #ifdef DEBUG
1424 __CTRACE(__CTRACE_REFRESH,
1425 "quickch: n=%d startw=%d curw=%d i = %d target=%d ",
1426 n, startw, curw, i, target);
1427 #endif
1428 if ((target >= startw && target < curw) || target < top
1429 || target > bot) {
1430 #ifdef DEBUG
1431 __CTRACE(__CTRACE_REFRESH, " notdirty\n");
1432 #endif
1433 __virtscr->alines[target]->flags &= ~__ISDIRTY;
1434 } else
1435 if ((n > 0 && target >= top && target < top + n) ||
1436 (n < 0 && target <= bot && target > bot + n)) {
1437 #ifndef HAVE_WCHAR
1438 if (clp->hash != blank_hash ||
1439 memcmp(clp->line, clp->line + 1,
1440 (__virtscr->maxx - 1)
1441 * __LDATASIZE) ||
1442 memcmp(clp->line, buf, __LDATASIZE)) {
1443 #else
1444 if (clp->hash != blank_hash
1445 || linecmp(clp->line, clp->line + 1,
1446 (unsigned int) (__virtscr->maxx - 1))
1447 || cellcmp(clp->line, buf)) {
1448 #endif /* HAVE_WCHAR */
1449 for (i = __virtscr->maxx;
1450 i > BLANKSIZE;
1451 i -= BLANKSIZE) {
1452 (void) memcpy(clp->line + i -
1453 BLANKSIZE, buf, sizeof(buf));
1454 }
1455 (void) memcpy(clp->line , buf, i *
1456 sizeof(buf[0]));
1457 #ifdef DEBUG
1458 __CTRACE(__CTRACE_REFRESH,
1459 " blanked out: dirty\n");
1460 #endif
1461 clp->hash = blank_hash;
1462 __touchline(__virtscr, target, 0, (int) __virtscr->maxx - 1);
1463 } else {
1464 #ifdef DEBUG
1465 __CTRACE(__CTRACE_REFRESH,
1466 " -- blank line already: dirty\n");
1467 #endif
1468 __touchline(__virtscr, target, 0, (int) __virtscr->maxx - 1);
1469 }
1470 } else {
1471 #ifdef DEBUG
1472 __CTRACE(__CTRACE_REFRESH, " -- dirty\n");
1473 #endif
1474 __touchline(__virtscr, target, 0, (int) __virtscr->maxx - 1);
1475 }
1476 if (target == cur_period) {
1477 i = target + 1;
1478 tmp1 = curscr->alines[i];
1479 cur_period = i;
1480 } else {
1481 tmp1 = tmp2;
1482 i = target;
1483 }
1484 }
1485 #ifdef DEBUG
1486 __CTRACE(__CTRACE_REFRESH, "$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$\n");
1487 for (i = 0; i < curscr->maxy; i++) {
1488 __CTRACE(__CTRACE_REFRESH, "C: %d:", i);
1489 for (j = 0; j < curscr->maxx; j++)
1490 __CTRACE(__CTRACE_REFRESH, "%c",
1491 curscr->alines[i]->line[j].ch);
1492 __CTRACE(__CTRACE_REFRESH, "\n");
1493 __CTRACE(__CTRACE_REFRESH, "W: %d:", i);
1494 for (j = 0; j < __virtscr->maxx; j++)
1495 __CTRACE(__CTRACE_REFRESH, "%c",
1496 __virtscr->alines[i]->line[j].ch);
1497 __CTRACE(__CTRACE_REFRESH, "\n");
1498 }
1499 #endif
1500 if (n != 0)
1501 scrolln(starts, startw, curs, bot, top);
1502 }
1503
1504 /*
1505 * scrolln --
1506 * Scroll n lines, where n is starts - startw.
1507 */
1508 static void /* ARGSUSED */
1509 scrolln(starts, startw, curs, bot, top)
1510 int starts, startw, curs, bot, top;
1511 {
1512 int i, oy, ox, n;
1513
1514 oy = curscr->cury;
1515 ox = curscr->curx;
1516 n = starts - startw;
1517
1518 /*
1519 * XXX
1520 * The initial tests that set __noqch don't let us reach here unless
1521 * we have either cs + ho + SF/sf/SR/sr, or AL + DL. SF/sf and SR/sr
1522 * scrolling can only shift the entire scrolling region, not just a
1523 * part of it, which means that the quickch() routine is going to be
1524 * sadly disappointed in us if we don't have cs as well.
1525 *
1526 * If cs, ho and SF/sf are set, can use the scrolling region. Because
1527 * the cursor position after cs is undefined, we need ho which gives us
1528 * the ability to move to somewhere without knowledge of the current
1529 * location of the cursor. Still call __mvcur() anyway, to update its
1530 * idea of where the cursor is.
1531 *
1532 * When the scrolling region has been set, the cursor has to be at the
1533 * last line of the region to make the scroll happen.
1534 *
1535 * Doing SF/SR or AL/DL appears faster on the screen than either sf/sr
1536 * or AL/DL, and, some terminals have AL/DL, sf/sr, and cs, but not
1537 * SF/SR. So, if we're scrolling almost all of the screen, try and use
1538 * AL/DL, otherwise use the scrolling region. The "almost all" is a
1539 * shameless hack for vi.
1540 */
1541 if (n > 0) {
1542 if (__tc_cs != NULL && __tc_ho != NULL && (__tc_SF != NULL ||
1543 ((__tc_AL == NULL || __tc_DL == NULL ||
1544 top > 3 || bot + 3 < __virtscr->maxy) &&
1545 __tc_sf != NULL))) {
1546 tputs(__tscroll(__tc_cs, top, bot + 1), 0, __cputchar);
1547 __mvcur(oy, ox, 0, 0, 1);
1548 tputs(__tc_ho, 0, __cputchar);
1549 __mvcur(0, 0, bot, 0, 1);
1550 if (__tc_SF != NULL)
1551 tputs(__tscroll(__tc_SF, n, 0), 0, __cputchar);
1552 else
1553 for (i = 0; i < n; i++)
1554 tputs(__tc_sf, 0, __cputchar);
1555 tputs(__tscroll(__tc_cs, 0, (int) __virtscr->maxy), 0,
1556 __cputchar);
1557 __mvcur(bot, 0, 0, 0, 1);
1558 tputs(__tc_ho, 0, __cputchar);
1559 __mvcur(0, 0, oy, ox, 1);
1560 return;
1561 }
1562
1563 /* Scroll up the block. */
1564 if (__tc_SF != NULL && top == 0) {
1565 __mvcur(oy, ox, bot, 0, 1);
1566 tputs(__tscroll(__tc_SF, n, 0), 0, __cputchar);
1567 } else
1568 if (__tc_DL != NULL) {
1569 __mvcur(oy, ox, top, 0, 1);
1570 tputs(__tscroll(__tc_DL, n, 0), 0, __cputchar);
1571 } else
1572 if (__tc_dl != NULL) {
1573 __mvcur(oy, ox, top, 0, 1);
1574 for (i = 0; i < n; i++)
1575 tputs(__tc_dl, 0, __cputchar);
1576 } else
1577 if (__tc_sf != NULL && top == 0) {
1578 __mvcur(oy, ox, bot, 0, 1);
1579 for (i = 0; i < n; i++)
1580 tputs(__tc_sf, 0,
1581 __cputchar);
1582 } else
1583 abort();
1584
1585 /* Push down the bottom region. */
1586 __mvcur(top, 0, bot - n + 1, 0, 1);
1587 if (__tc_AL != NULL)
1588 tputs(__tscroll(__tc_AL, n, 0), 0, __cputchar);
1589 else
1590 if (__tc_al != NULL)
1591 for (i = 0; i < n; i++)
1592 tputs(__tc_al, 0, __cputchar);
1593 else
1594 abort();
1595 __mvcur(bot - n + 1, 0, oy, ox, 1);
1596 } else {
1597 /*
1598 * !!!
1599 * n < 0
1600 *
1601 * If cs, ho and SR/sr are set, can use the scrolling region.
1602 * See the above comments for details.
1603 */
1604 if (__tc_cs != NULL && __tc_ho != NULL && (__tc_SR != NULL ||
1605 ((__tc_AL == NULL || __tc_DL == NULL || top > 3 ||
1606 bot + 3 < __virtscr->maxy) && __tc_sr != NULL))) {
1607 tputs(__tscroll(__tc_cs, top, bot + 1), 0, __cputchar);
1608 __mvcur(oy, ox, 0, 0, 1);
1609 tputs(__tc_ho, 0, __cputchar);
1610 __mvcur(0, 0, top, 0, 1);
1611
1612 if (__tc_SR != NULL)
1613 tputs(__tscroll(__tc_SR, -n, 0), 0, __cputchar);
1614 else
1615 for (i = n; i < 0; i++)
1616 tputs(__tc_sr, 0, __cputchar);
1617 tputs(__tscroll(__tc_cs, 0, (int) __virtscr->maxy), 0,
1618 __cputchar);
1619 __mvcur(top, 0, 0, 0, 1);
1620 tputs(__tc_ho, 0, __cputchar);
1621 __mvcur(0, 0, oy, ox, 1);
1622 return;
1623 }
1624
1625 /* Preserve the bottom lines. */
1626 __mvcur(oy, ox, bot + n + 1, 0, 1);
1627 if (__tc_SR != NULL && bot == __virtscr->maxy)
1628 tputs(__tscroll(__tc_SR, -n, 0), 0, __cputchar);
1629 else
1630 if (__tc_DL != NULL)
1631 tputs(__tscroll(__tc_DL, -n, 0), 0, __cputchar);
1632 else
1633 if (__tc_dl != NULL)
1634 for (i = n; i < 0; i++)
1635 tputs(__tc_dl, 0, __cputchar);
1636 else
1637 if (__tc_sr != NULL &&
1638 bot == __virtscr->maxy)
1639 for (i = n; i < 0; i++)
1640 tputs(__tc_sr, 0,
1641 __cputchar);
1642 else
1643 abort();
1644
1645 /* Scroll the block down. */
1646 __mvcur(bot + n + 1, 0, top, 0, 1);
1647 if (__tc_AL != NULL)
1648 tputs(__tscroll(__tc_AL, -n, 0), 0, __cputchar);
1649 else
1650 if (__tc_al != NULL)
1651 for (i = n; i < 0; i++)
1652 tputs(__tc_al, 0, __cputchar);
1653 else
1654 abort();
1655 __mvcur(top, 0, oy, ox, 1);
1656 }
1657 }
1658
1659 /*
1660 * __unsetattr --
1661 * Unset attributes on curscr. Leave standout, attribute and colour
1662 * modes if necessary (!ms). Always leave altcharset (xterm at least
1663 * ignores a cursor move if we don't).
1664 */
1665 void /* ARGSUSED */
1666 __unsetattr(int checkms)
1667 {
1668 int isms;
1669
1670 if (checkms)
1671 if (!__tc_ms) {
1672 isms = 1;
1673 } else {
1674 isms = 0;
1675 }
1676 else
1677 isms = 1;
1678 #ifdef DEBUG
1679 __CTRACE(__CTRACE_REFRESH,
1680 "__unsetattr: checkms = %d, ms = %s, wattr = %08x\n",
1681 checkms, __tc_ms ? "TRUE" : "FALSE", curscr->wattr);
1682 #endif
1683
1684 /*
1685 * Don't leave the screen in standout mode (check against ms). Check
1686 * to see if we also turn off underscore, attributes and colour.
1687 */
1688 if (curscr->wattr & __STANDOUT && isms) {
1689 tputs(__tc_se, 0, __cputchar);
1690 curscr->wattr &= __mask_se;
1691 }
1692 /*
1693 * Don't leave the screen in underscore mode (check against ms).
1694 * Check to see if we also turn off attributes. Assume that we
1695 * also turn off colour.
1696 */
1697 if (curscr->wattr & __UNDERSCORE && isms) {
1698 tputs(__tc_ue, 0, __cputchar);
1699 curscr->wattr &= __mask_ue;
1700 }
1701 /*
1702 * Don't leave the screen with attributes set (check against ms).
1703 * Assume that also turn off colour.
1704 */
1705 if (curscr->wattr & __TERMATTR && isms) {
1706 tputs(__tc_me, 0, __cputchar);
1707 curscr->wattr &= __mask_me;
1708 }
1709 /* Don't leave the screen with altcharset set (don't check ms). */
1710 if (curscr->wattr & __ALTCHARSET) {
1711 tputs(__tc_ae, 0, __cputchar);
1712 curscr->wattr &= ~__ALTCHARSET;
1713 }
1714 /* Don't leave the screen with colour set (check against ms). */
1715 if (__using_color && isms)
1716 __unset_color(curscr);
1717 }
1718
1719 #ifdef HAVE_WCHAR
1720 /* compare two cells on screen, must have the same forground/background,
1721 * and the same sequence of non-spacing characters */
1722 int
1723 cellcmp( __LDATA *x, __LDATA *y )
1724 {
1725 nschar_t *xnp = x->nsp, *ynp = y->nsp;
1726 int ret = ( x->ch == y->ch ) & ( x->attr == y->attr );
1727
1728 if ( !ret )
1729 return 0;
1730 if ( !xnp && !ynp )
1731 return 1;
1732 if (( xnp && !ynp ) || ( !xnp && ynp ))
1733 return 0;
1734
1735 while ( xnp && ynp ) {
1736 if ( xnp->ch != ynp->ch )
1737 return 0;
1738 xnp = xnp->next;
1739 ynp = ynp->next;
1740 }
1741 return ( !xnp && !ynp );
1742 }
1743
1744 /* compare two line segments */
1745 int
1746 linecmp( __LDATA *xl, __LDATA *yl, size_t len )
1747 {
1748 int i = 0;
1749 __LDATA *xp = xl, *yp = yl;
1750
1751 for ( i = 0; i < len; i++, xp++, yp++ ) {
1752 if ( !cellcmp( xp, yp ))
1753 return 0;
1754 }
1755 return 1;
1756 }
1757
1758 /*
1759 * Output the non-spacing characters associated with the given character
1760 * cell to the screen.
1761 */
1762
1763 void
1764 __cursesi_putnsp(nschar_t *nsp, const int wy, const int wx)
1765 {
1766 nschar_t *p;
1767
1768 /* this shuts up gcc warnings about wx and wy not being used */
1769 if (wx > wy) {
1770 }
1771
1772 p = nsp;
1773 while (p != NULL) {
1774 __cputwchar((int) p->ch);
1775 #ifdef DEBUG
1776 __CTRACE(__CTRACE_REFRESH,
1777 "_cursesi_putnsp: (%d,%d) non-spacing putwchar(0x%x)\n",
1778 wy, wx - 1, p->ch);
1779 #endif
1780 p = p->next;
1781 }
1782 }
1783
1784 #endif /* HAVE_WCHAR */
NetBSD on the FriendlyARM MINI2440