1 /* $NetBSD: refresh.c,v 1.58 2003/08/07 16:44:23 agc 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 1.58 2003/08/07 16:44:23 agc 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 __P((int, int, int, int)); 48 static int makech __P((int)); 49 static void quickch __P((void)); 50 static void scrolln __P((int, int, int, int, int)); 51 52 static int _cursesi_wnoutrefresh(SCREEN *, WINDOW *, int, int, int, int, int, int); 53 54 #ifndef _CURSES_USE_MACROS 55 56 /* 57 * refresh -- 58 * Make the current screen look like "stdscr" over the area covered by 59 * stdscr. 60 */ 61 int 62 refresh(void) 63 { 64 return wrefresh(stdscr); 65 } 66 67 #endif 68 69 /* 70 * wnoutrefresh -- 71 * Add the contents of "win" to the virtual window. 72 */ 73 int 74 wnoutrefresh(WINDOW *win) 75 { 76 #ifdef DEBUG 77 __CTRACE("wnoutrefresh: win %p\n", win); 78 #endif 79 80 return _cursesi_wnoutrefresh(_cursesi_screen, win, 0, 0, win->begy, 81 win->begx, win->maxy, win->maxx); 82 } 83 84 /* 85 * pnoutrefresh -- 86 * Add the contents of "pad" to the virtual window. 87 */ 88 int 89 pnoutrefresh(WINDOW *pad, int pbegy, int pbegx, int sbegy, int sbegx, 90 int smaxy, int smaxx) 91 { 92 int pmaxy, pmaxx; 93 94 #ifdef DEBUG 95 __CTRACE("pnoutrefresh: pad %p, flags 0x%08x\n", pad, pad->flags); 96 __CTRACE("pnoutrefresh: (%d, %d), (%d, %d), (%d, %d)\n", pbegy, pbegx, 97 sbegy, sbegx, smaxy, smaxx); 98 #endif 99 100 /* SUS says if these are negative, they should be treated as zero */ 101 if (pbegy < 0) 102 pbegy = 0; 103 if (pbegx < 0) 104 pbegx = 0; 105 if (sbegy < 0) 106 sbegy = 0; 107 if (sbegx < 0) 108 sbegx = 0; 109 110 /* Calculate rectangle on pad - used by _cursesi_wnoutrefresh */ 111 pmaxy = pbegy + smaxy - sbegy + 1; 112 pmaxx = pbegx + smaxx - sbegx + 1; 113 114 /* Check rectangle fits in pad */ 115 if (pmaxy > pad->maxy - pad->begy) 116 pmaxy = pad->maxy - pad->begy; 117 if (pmaxx > pad->maxx - pad->begx) 118 pmaxx = pad->maxx - pad->begx; 119 120 if (smaxy - sbegy < 0 || smaxx - sbegx < 0 ) 121 return ERR; 122 123 return _cursesi_wnoutrefresh(_cursesi_screen, pad, 124 pad->begy + pbegy, pad->begx + pbegx, pad->begy + sbegy, 125 pad->begx + sbegx, pmaxy, pmaxx); 126 } 127 128 /* 129 * _cursesi_wnoutrefresh -- 130 * Does the grunt work for wnoutrefresh to the given screen. 131 * Copies the part of the window given by the rectangle 132 * (begy, begx) to (maxy, maxx) at screen position (wbegy, wbegx). 133 */ 134 int 135 _cursesi_wnoutrefresh(SCREEN *screen, WINDOW *win, int begy, int begx, 136 int wbegy, int wbegx, int maxy, int maxx) 137 { 138 139 short sy, wy, wx, y_off, x_off, mx; 140 __LINE *wlp, *vlp; 141 WINDOW *sub_win, *orig; 142 143 #ifdef DEBUG 144 __CTRACE("_wnoutrefresh: win %p, flags 0x%08x\n", win, win->flags); 145 __CTRACE("_wnoutrefresh: (%d, %d), (%d, %d), (%d, %d)\n", 146 begy, begx, wbegy, wbegx, maxy, maxx); 147 #endif 148 149 if (screen->curwin) 150 return OK; 151 152 /* 153 * Recurse through any sub-windows, mark as dirty lines on the parent 154 * window that are dirty on the sub-window and clear the dirty flag on 155 * the sub-window. 156 */ 157 if (win->orig == 0) { 158 orig = win; 159 for (sub_win = win->nextp; sub_win != win; 160 sub_win = sub_win->nextp) { 161 #ifdef DEBUG 162 __CTRACE("wnout_refresh: win %p, sub_win %p\n", 163 orig, sub_win); 164 #endif 165 for (sy = 0; sy < sub_win->maxy; sy++) { 166 if (sub_win->lines[sy]->flags == __ISDIRTY) { 167 orig->lines[sy + sub_win->begy - orig->begy]->flags |= __ISDIRTY; 168 sub_win->lines[sy]->flags &= ~__ISDIRTY; 169 } 170 } 171 } 172 } 173 174 /* Check that cursor position on "win" is valid for "__virtscr" */ 175 if (win->cury + wbegy - begy < screen->__virtscr->maxy && 176 win->cury + wbegy - begy >= 0 && win->cury < maxy - begy) 177 screen->__virtscr->cury = win->cury + wbegy - begy; 178 if (win->curx + wbegx - begx < screen->__virtscr->maxx && 179 win->curx + wbegx - begx >= 0 && win->curx < maxx - begx) 180 screen->__virtscr->curx = win->curx + wbegx - begx; 181 182 /* Copy the window flags from "win" to "__virtscr" */ 183 if (win->flags & __CLEAROK) { 184 if (win->flags & __FULLWIN) 185 screen->__virtscr->flags |= __CLEAROK; 186 win->flags &= ~__CLEAROK; 187 } 188 screen->__virtscr->flags &= ~__LEAVEOK; 189 screen->__virtscr->flags |= win->flags; 190 191 for (wy = begy, y_off = wbegy; wy < maxy && 192 y_off < screen->__virtscr->maxy; wy++, y_off++) { 193 wlp = win->lines[wy]; 194 #ifdef DEBUG 195 __CTRACE("_wnoutrefresh: wy %d\tf %d\tl %d\tflags %x\n", 196 wy, *wlp->firstchp, *wlp->lastchp, wlp->flags); 197 #endif 198 if ((wlp->flags & __ISDIRTY) == 0) 199 continue; 200 vlp = screen->__virtscr->lines[y_off]; 201 202 if (*wlp->firstchp < maxx + win->ch_off && 203 *wlp->lastchp >= win->ch_off) { 204 /* Set start column */ 205 wx = begx; 206 x_off = wbegx; 207 if (*wlp->firstchp - win->ch_off > 0) { 208 wx += *wlp->firstchp - win->ch_off; 209 x_off += *wlp->firstchp - win->ch_off; 210 } 211 /* Set finish column */ 212 mx = maxx; 213 if (mx > *wlp->lastchp - win->ch_off + 1) 214 mx = *wlp->lastchp - win->ch_off + 1; 215 if (x_off + (mx - wx) > __virtscr->maxx) 216 mx -= (x_off + maxx) - __virtscr->maxx; 217 /* Copy line from "win" to "__virtscr". */ 218 while (wx < mx) { 219 #ifdef DEBUG 220 __CTRACE("_wnoutrefresh: copy from %d, %d to %d, %d\n", 221 wy, wx, y_off, x_off); 222 #endif 223 vlp->line[x_off].attr = wlp->line[wx].attr; 224 /* Copy attributes */ 225 if (wlp->line[wx].attr & __COLOR) 226 vlp->line[x_off].attr |= 227 wlp->line[wx].battr & ~__COLOR; 228 else 229 vlp->line[x_off].attr |= 230 wlp->line[wx].battr; 231 /* Check for nca conflict with colour */ 232 if ((vlp->line[x_off].attr & __COLOR) && 233 (vlp->line[x_off].attr & 234 _cursesi_screen->nca)) 235 vlp->line[x_off].attr &= ~__COLOR; 236 /* Copy character */ 237 if (wlp->line[wx].ch == ' ' && 238 wlp->line[wx].bch != ' ') 239 vlp->line[x_off].ch 240 = wlp->line[wx].bch; 241 else 242 vlp->line[x_off].ch 243 = wlp->line[wx].ch; 244 wx++; 245 x_off++; 246 } 247 248 /* Set flags on "__virtscr" and unset on "win". */ 249 if (wlp->flags & __ISPASTEOL) 250 vlp->flags |= __ISPASTEOL; 251 else 252 vlp->flags &= ~__ISPASTEOL; 253 if (wlp->flags & __ISDIRTY) 254 vlp->flags |= __ISDIRTY; 255 256 #ifdef DEBUG 257 __CTRACE("win: firstch = %d, lastch = %d\n", 258 *wlp->firstchp, *wlp->lastchp); 259 #endif 260 /* Set change pointers on "__virtscr". */ 261 if (*vlp->firstchp > 262 *wlp->firstchp + wbegx - win->ch_off) 263 *vlp->firstchp = 264 *wlp->firstchp + wbegx - win->ch_off; 265 if (*vlp->lastchp < 266 *wlp->lastchp + wbegx - win->ch_off) 267 *vlp->lastchp = 268 *wlp->lastchp + wbegx - win->ch_off; 269 #ifdef DEBUG 270 __CTRACE("__virtscr: firstch = %d, lastch = %d\n", 271 *vlp->firstchp, *vlp->lastchp); 272 #endif 273 /* 274 * Unset change pointers only if a window, as a pad 275 * can be displayed again without any of the contents 276 * changing. 277 */ 278 if (!(win->flags & __ISPAD)) { 279 /* Set change pointers on "win". */ 280 if (*wlp->firstchp >= win->ch_off) 281 *wlp->firstchp = maxx + win->ch_off; 282 if (*wlp->lastchp < maxx + win->ch_off) 283 *wlp->lastchp = win->ch_off; 284 if ((*wlp->lastchp < *wlp->firstchp) || 285 (*wlp->firstchp >= maxx + win->ch_off) || 286 (*wlp->lastchp <= win->ch_off)) { 287 #ifdef DEBUG 288 __CTRACE("_wnoutrefresh: line %d notdirty\n", wy); 289 #endif 290 wlp->flags &= ~__ISDIRTY; 291 } 292 } 293 } 294 } 295 return OK; 296 } 297 298 /* 299 * wrefresh -- 300 * Make the current screen look like "win" over the area covered by 301 * win. 302 */ 303 int 304 wrefresh(WINDOW *win) 305 { 306 int retval; 307 308 #ifdef DEBUG 309 __CTRACE("wrefresh: win %p\n", win); 310 #endif 311 312 _cursesi_screen->curwin = (win == _cursesi_screen->curscr); 313 if (!_cursesi_screen->curwin) 314 retval = _cursesi_wnoutrefresh(_cursesi_screen, win, 0, 0, 315 win->begy, win->begx, win->maxy, win->maxx); 316 else 317 retval = OK; 318 if (retval == OK) { 319 retval = doupdate(); 320 if (!(win->flags & __LEAVEOK)) { 321 win->cury = max(0, curscr->cury - win->begy); 322 win->curx = max(0, curscr->curx - win->begx); 323 } 324 } 325 _cursesi_screen->curwin = 0; 326 return(retval); 327 } 328 329 /* 330 * prefresh -- 331 * Make the current screen look like "pad" over the area coverd by 332 * the specified area of pad. 333 */ 334 int 335 prefresh(WINDOW *pad, int pbegy, int pbegx, int sbegy, int sbegx, 336 int smaxy, int smaxx) 337 { 338 int retval; 339 340 #ifdef DEBUG 341 __CTRACE("prefresh: pad %p, flags 0x%08x\n", pad, pad->flags); 342 #endif 343 344 /* Use pnoutrefresh() to avoid duplicating code here */ 345 retval = pnoutrefresh(pad, pbegy, pbegx, sbegy, sbegx, smaxy, smaxx); 346 if (retval == OK) { 347 retval = doupdate(); 348 if (!(pad->flags & __LEAVEOK)) { 349 pad->cury = max(0, curscr->cury - pad->begy); 350 pad->curx = max(0, curscr->curx - pad->begx); 351 } 352 } 353 return(retval); 354 } 355 356 /* 357 * doupdate -- 358 * Make the current screen look like the virtual window "__virtscr". 359 */ 360 int 361 doupdate(void) 362 { 363 WINDOW *win; 364 __LINE *wlp; 365 short wy; 366 int dnum; 367 368 /* Check if we need to restart ... */ 369 if (_cursesi_screen->endwin) 370 __restartwin(); 371 372 if (_cursesi_screen->curwin) 373 win = curscr; 374 else 375 win = _cursesi_screen->__virtscr; 376 377 /* Initialize loop parameters. */ 378 _cursesi_screen->ly = curscr->cury; 379 _cursesi_screen->lx = curscr->curx; 380 wy = 0; 381 382 if (!_cursesi_screen->curwin) 383 for (wy = 0; wy < win->maxy; wy++) { 384 wlp = win->lines[wy]; 385 if (wlp->flags & __ISDIRTY) 386 wlp->hash = __hash((char *)(void *)wlp->line, 387 (size_t) (win->maxx * __LDATASIZE)); 388 } 389 390 if ((win->flags & __CLEAROK) || (curscr->flags & __CLEAROK) || 391 _cursesi_screen->curwin) { 392 if (curscr->wattr & __COLOR) 393 __unsetattr(0); 394 tputs(__tc_cl, 0, __cputchar); 395 _cursesi_screen->ly = 0; 396 _cursesi_screen->lx = 0; 397 if (!_cursesi_screen->curwin) { 398 curscr->flags &= ~__CLEAROK; 399 curscr->cury = 0; 400 curscr->curx = 0; 401 werase(curscr); 402 } 403 __touchwin(win); 404 win->flags &= ~__CLEAROK; 405 } 406 if (!__CA) { 407 if (win->curx != 0) 408 __cputchar('\n'); 409 if (!_cursesi_screen->curwin) 410 werase(curscr); 411 } 412 #ifdef DEBUG 413 __CTRACE("doupdate: (%p): curwin = %d\n", win, 414 _cursesi_screen->curwin); 415 __CTRACE("doupdate: \tfirstch\tlastch\n"); 416 #endif 417 418 if (!_cursesi_screen->curwin) { 419 /* 420 * Invoke quickch() only if more than a quarter of the lines 421 * in the window are dirty. 422 */ 423 for (wy = 0, dnum = 0; wy < win->maxy; wy++) 424 if (win->lines[wy]->flags & __ISDIRTY) 425 dnum++; 426 if (!__noqch && dnum > (int) win->maxy / 4) 427 quickch(); 428 } 429 430 #ifdef DEBUG 431 { 432 int i, j; 433 434 __CTRACE("#####################################\n"); 435 for (i = 0; i < curscr->maxy; i++) { 436 __CTRACE("C: %d:", i); 437 __CTRACE(" 0x%x \n", curscr->lines[i]->hash); 438 for (j = 0; j < curscr->maxx; j++) 439 __CTRACE("%c", curscr->lines[i]->line[j].ch); 440 __CTRACE("\n"); 441 __CTRACE(" attr:"); 442 for (j = 0; j < curscr->maxx; j++) 443 __CTRACE(" %x", 444 curscr->lines[i]->line[j].attr); 445 __CTRACE("\n"); 446 __CTRACE("W: %d:", i); 447 __CTRACE(" 0x%x \n", win->lines[i]->hash); 448 __CTRACE(" 0x%x ", win->lines[i]->flags); 449 for (j = 0; j < win->maxx; j++) 450 __CTRACE("%c", win->lines[i]->line[j].ch); 451 __CTRACE("\n"); 452 __CTRACE(" attr:"); 453 for (j = 0; j < win->maxx; j++) 454 __CTRACE(" %x", 455 win->lines[i]->line[j].attr); 456 __CTRACE("\n"); 457 } 458 } 459 #endif /* DEBUG */ 460 461 for (wy = 0; wy < win->maxy; wy++) { 462 wlp = win->lines[wy]; 463 /* XXX: remove this debug */ 464 #ifdef DEBUG 465 __CTRACE("doupdate: wy %d\tf: %d\tl:%d\tflags %x\n", wy, 466 *wlp->firstchp, *wlp->lastchp, wlp->flags); 467 #endif 468 if (!_cursesi_screen->curwin) 469 curscr->lines[wy]->hash = wlp->hash; 470 if (wlp->flags & __ISDIRTY) { 471 if (makech(wy) == ERR) 472 return (ERR); 473 else { 474 if (*wlp->firstchp >= 0) 475 *wlp->firstchp = win->maxx; 476 if (*wlp->lastchp < win->maxx) 477 *wlp->lastchp = 0; 478 if (*wlp->lastchp < *wlp->firstchp) { 479 #ifdef DEBUG 480 __CTRACE("doupdate: line %d notdirty\n", wy); 481 #endif 482 wlp->flags &= ~__ISDIRTY; 483 } 484 } 485 486 } 487 #ifdef DEBUG 488 __CTRACE("\t%d\t%d\n", *wlp->firstchp, *wlp->lastchp); 489 #endif 490 } 491 492 #ifdef DEBUG 493 __CTRACE("doupdate: ly=%d, lx=%d\n", _cursesi_screen->ly, 494 _cursesi_screen->lx); 495 #endif 496 497 if (_cursesi_screen->curwin) 498 domvcur(_cursesi_screen->ly, _cursesi_screen->lx, 499 (int) win->cury, (int) win->curx); 500 else { 501 if (win->flags & __LEAVEOK) { 502 curscr->cury = _cursesi_screen->ly; 503 curscr->curx = _cursesi_screen->lx; 504 } else { 505 domvcur(_cursesi_screen->ly, _cursesi_screen->lx, 506 win->cury, win->curx); 507 curscr->cury = win->cury; 508 curscr->curx = win->curx; 509 } 510 } 511 512 /* Don't leave the screen with attributes set. */ 513 __unsetattr(0); 514 (void) fflush(_cursesi_screen->outfd); 515 return (OK); 516 } 517 518 /* 519 * makech -- 520 * Make a change on the screen. 521 */ 522 static int 523 makech(wy) 524 int wy; 525 { 526 WINDOW *win; 527 static __LDATA blank = {' ', 0, ' ', 0}; 528 __LDATA *nsp, *csp, *cp, *cep; 529 int clsp, nlsp; /* Last space in lines. */ 530 int lch, wx; 531 char *ce; 532 attr_t lspc; /* Last space colour */ 533 attr_t off, on; 534 535 #ifdef __GNUC__ 536 nlsp = lspc = 0; /* XXX gcc -Wuninitialized */ 537 #endif 538 if (_cursesi_screen->curwin) 539 win = curscr; 540 else 541 win = __virtscr; 542 /* Is the cursor still on the end of the last line? */ 543 if (wy > 0 && curscr->lines[wy - 1]->flags & __ISPASTEOL) { 544 domvcur(_cursesi_screen->ly, _cursesi_screen->lx, 545 _cursesi_screen->ly + 1, 0); 546 _cursesi_screen->ly++; 547 _cursesi_screen->lx = 0; 548 } 549 wx = *win->lines[wy]->firstchp; 550 if (wx < 0) 551 wx = 0; 552 else 553 if (wx >= win->maxx) 554 return (OK); 555 lch = *win->lines[wy]->lastchp; 556 if (lch < 0) 557 return (OK); 558 else 559 if (lch >= (int) win->maxx) 560 lch = win->maxx - 1; 561 562 if (_cursesi_screen->curwin) 563 csp = ␣ 564 else 565 csp = &curscr->lines[wy]->line[wx]; 566 567 nsp = &win->lines[wy]->line[wx]; 568 if (__tc_ce && !_cursesi_screen->curwin) { 569 cp = &win->lines[wy]->line[win->maxx - 1]; 570 lspc = cp->attr & __COLOR; 571 while (cp->ch == ' ' && cp->attr == lspc) 572 if (cp-- <= win->lines[wy]->line) 573 break; 574 nlsp = cp - win->lines[wy]->line; 575 if (nlsp < 0) 576 nlsp = 0; 577 } 578 if (!_cursesi_screen->curwin) 579 ce = __tc_ce; 580 else 581 ce = NULL; 582 583 while (wx <= lch) { 584 if (memcmp(nsp, csp, sizeof(__LDATA)) == 0) { 585 if (wx <= lch) { 586 while (wx <= lch && 587 memcmp(nsp, csp, sizeof(__LDATA)) == 0) { 588 nsp++; 589 if (!_cursesi_screen->curwin) 590 ++csp; 591 ++wx; 592 } 593 continue; 594 } 595 break; 596 } 597 domvcur(_cursesi_screen->ly, _cursesi_screen->lx, wy, wx); 598 599 #ifdef DEBUG 600 __CTRACE("makech: 1: wx = %d, ly= %d, lx = %d, newy = %d, newx = %d\n", 601 wx, _cursesi_screen->ly, _cursesi_screen->lx, wy, wx); 602 #endif 603 _cursesi_screen->ly = wy; 604 _cursesi_screen->lx = wx; 605 while (memcmp(nsp, csp, sizeof(__LDATA)) != 0 && wx <= lch) { 606 if (ce != NULL && 607 wx >= nlsp && nsp->ch == ' ' && nsp->attr == lspc) { 608 /* Check for clear to end-of-line. */ 609 cep = &curscr->lines[wy]->line[win->maxx - 1]; 610 while (cep->ch == ' ' && cep->attr == lspc) 611 if (cep-- <= csp) 612 break; 613 clsp = cep - curscr->lines[wy]->line - 614 win->begx * __LDATASIZE; 615 #ifdef DEBUG 616 __CTRACE("makech: clsp = %d, nlsp = %d\n", 617 clsp, nlsp); 618 #endif 619 if (((clsp - nlsp >= strlen(__tc_ce) && 620 clsp < win->maxx * __LDATASIZE) || 621 wy == win->maxy - 1) && 622 (!(lspc & __COLOR) || 623 ((lspc & __COLOR) && __tc_ut))) { 624 __unsetattr(0); 625 if (__using_color && 626 ((lspc & __COLOR) != 627 (curscr->wattr & __COLOR))) 628 __set_color(curscr, lspc & 629 __COLOR); 630 tputs(__tc_ce, 0, __cputchar); 631 _cursesi_screen->lx = wx + win->begx; 632 while (wx++ <= clsp) { 633 csp->ch = ' '; 634 csp->attr = lspc; 635 csp++; 636 } 637 return (OK); 638 } 639 ce = NULL; 640 } 641 642 #ifdef DEBUG 643 __CTRACE("makech: have attributes %08x, need attributes %08x\n", curscr->wattr, nsp->attr); 644 #endif 645 646 off = ~nsp->attr & curscr->wattr; 647 648 /* 649 * Unset attributes as appropriate. Unset first 650 * so that the relevant attributes can be reset 651 * (because 'me' unsets 'mb', 'md', 'mh', 'mk', 652 * 'mp' and 'mr'). Check to see if we also turn off 653 * standout, attributes and colour. 654 */ 655 if (off & __TERMATTR && __tc_me != NULL) { 656 tputs(__tc_me, 0, __cputchar); 657 curscr->wattr &= __mask_me; 658 off &= __mask_me; 659 } 660 661 /* 662 * Exit underscore mode if appropriate. 663 * Check to see if we also turn off standout, 664 * attributes and colour. 665 */ 666 if (off & __UNDERSCORE && __tc_ue != NULL) { 667 tputs(__tc_ue, 0, __cputchar); 668 curscr->wattr &= __mask_ue; 669 off &= __mask_ue; 670 } 671 672 /* 673 * Exit standout mode as appropriate. 674 * Check to see if we also turn off underscore, 675 * attributes and colour. 676 * XXX 677 * Should use uc if so/se not available. 678 */ 679 if (off & __STANDOUT && __tc_se != NULL) { 680 tputs(__tc_se, 0, __cputchar); 681 curscr->wattr &= __mask_se; 682 off &= __mask_se; 683 } 684 685 if (off & __ALTCHARSET && __tc_ae != NULL) { 686 tputs(__tc_ae, 0, __cputchar); 687 curscr->wattr &= ~__ALTCHARSET; 688 } 689 690 /* Set/change colour as appropriate. */ 691 if (__using_color) 692 __set_color(curscr, nsp->attr & __COLOR); 693 694 on = nsp->attr & ~curscr->wattr; 695 696 /* 697 * Enter standout mode if appropriate. 698 */ 699 if (on & __STANDOUT && __tc_so != NULL && __tc_se 700 != NULL) { 701 tputs(__tc_so, 0, __cputchar); 702 curscr->wattr |= __STANDOUT; 703 } 704 705 /* 706 * Enter underscore mode if appropriate. 707 * XXX 708 * Should use uc if us/ue not available. 709 */ 710 if (on & __UNDERSCORE && __tc_us != NULL && 711 __tc_ue != NULL) { 712 tputs(__tc_us, 0, __cputchar); 713 curscr->wattr |= __UNDERSCORE; 714 } 715 716 /* 717 * Set other attributes as appropriate. 718 */ 719 if (__tc_me != NULL) { 720 if (on & __BLINK && __tc_mb != NULL) { 721 tputs(__tc_mb, 0, __cputchar); 722 curscr->wattr |= __BLINK; 723 } 724 if (on & __BOLD && __tc_md != NULL) { 725 tputs(__tc_md, 0, __cputchar); 726 curscr->wattr |= __BOLD; 727 } 728 if (on & __DIM && __tc_mh != NULL) { 729 tputs(__tc_mh, 0, __cputchar); 730 curscr->wattr |= __DIM; 731 } 732 if (on & __BLANK && __tc_mk != NULL) { 733 tputs(__tc_mk, 0, __cputchar); 734 curscr->wattr |= __BLANK; 735 } 736 if (on & __PROTECT && __tc_mp != NULL) { 737 tputs(__tc_mp, 0, __cputchar); 738 curscr->wattr |= __PROTECT; 739 } 740 if (on & __REVERSE && __tc_mr != NULL) { 741 tputs(__tc_mr, 0, __cputchar); 742 curscr->wattr |= __REVERSE; 743 } 744 } 745 746 /* Enter/exit altcharset mode as appropriate. */ 747 if (on & __ALTCHARSET && __tc_as != NULL && 748 __tc_ae != NULL) { 749 tputs(__tc_as, 0, __cputchar); 750 curscr->wattr |= __ALTCHARSET; 751 } 752 753 wx++; 754 if (wx >= win->maxx && 755 wy == win->maxy - 1 && !_cursesi_screen->curwin) 756 if (win->flags & __SCROLLOK) { 757 if (win->flags & __ENDLINE) 758 __unsetattr(1); 759 if (!(win->flags & __SCROLLWIN)) { 760 if (!_cursesi_screen->curwin) { 761 csp->attr = nsp->attr; 762 __cputchar((int) 763 (csp->ch = 764 nsp->ch)); 765 } else 766 __cputchar((int) nsp->ch); 767 } 768 if (wx < curscr->maxx) { 769 domvcur(_cursesi_screen->ly, wx, 770 (int) (win->maxy - 1), 771 (int) (win->maxx - 1)); 772 } 773 _cursesi_screen->ly = win->maxy - 1; 774 _cursesi_screen->lx = win->maxx - 1; 775 return (OK); 776 } 777 if (wx < win->maxx || wy < win->maxy - 1 || 778 !(win->flags & __SCROLLWIN)) { 779 if (!_cursesi_screen->curwin) { 780 csp->attr = nsp->attr; 781 __cputchar((int) (csp->ch = nsp->ch)); 782 csp++; 783 } else 784 __cputchar((int) nsp->ch); 785 } 786 #ifdef DEBUG 787 __CTRACE("makech: putchar(%c)\n", nsp->ch & 0177); 788 #endif 789 if (__tc_uc && ((nsp->attr & __STANDOUT) || 790 (nsp->attr & __UNDERSCORE))) { 791 __cputchar('\b'); 792 tputs(__tc_uc, 0, __cputchar); 793 } 794 nsp++; 795 #ifdef DEBUG 796 __CTRACE("makech: 2: wx = %d, lx = %d\n", wx, _cursesi_screen->lx); 797 #endif 798 } 799 if (_cursesi_screen->lx == wx) /* If no change. */ 800 break; 801 _cursesi_screen->lx = wx; 802 if (_cursesi_screen->lx >= COLS && __tc_am) 803 _cursesi_screen->lx = COLS - 1; 804 else 805 if (wx >= win->maxx) { 806 domvcur(_cursesi_screen->ly, 807 _cursesi_screen->lx, 808 _cursesi_screen->ly, 809 (int) (win->maxx - 1)); 810 _cursesi_screen->lx = win->maxx - 1; 811 } 812 #ifdef DEBUG 813 __CTRACE("makech: 3: wx = %d, lx = %d\n", wx, 814 _cursesi_screen->lx); 815 #endif 816 } 817 818 return (OK); 819 } 820 821 /* 822 * domvcur -- 823 * Do a mvcur, leaving attributes if necessary. 824 */ 825 static void 826 domvcur(oy, ox, ny, nx) 827 int oy, ox, ny, nx; 828 { 829 __unsetattr(1); 830 __mvcur(oy, ox, ny, nx, 1); 831 } 832 833 /* 834 * Quickch() attempts to detect a pattern in the change of the window 835 * in order to optimize the change, e.g., scroll n lines as opposed to 836 * repainting the screen line by line. 837 */ 838 839 static __LDATA buf[128]; 840 static u_int last_hash; 841 static size_t last_hash_len; 842 #define BLANKSIZE (sizeof(buf) / sizeof(buf[0])) 843 844 static void 845 quickch(void) 846 { 847 #define THRESH (int) __virtscr->maxy / 4 848 849 __LINE *clp, *tmp1, *tmp2; 850 int bsize, curs, curw, starts, startw, i, j; 851 int n, target, cur_period, bot, top, sc_region; 852 u_int blank_hash; 853 attr_t bcolor; 854 855 #ifdef __GNUC__ 856 curs = curw = starts = startw = 0; /* XXX gcc -Wuninitialized */ 857 #endif 858 /* 859 * Find how many lines from the top of the screen are unchanged. 860 */ 861 for (top = 0; top < __virtscr->maxy; top++) 862 if (__virtscr->lines[top]->flags & __ISDIRTY && 863 (__virtscr->lines[top]->hash != curscr->lines[top]->hash || 864 memcmp(__virtscr->lines[top]->line, 865 curscr->lines[top]->line, 866 (size_t) __virtscr->maxx * __LDATASIZE) != 0)) 867 break; 868 else 869 __virtscr->lines[top]->flags &= ~__ISDIRTY; 870 /* 871 * Find how many lines from bottom of screen are unchanged. 872 */ 873 for (bot = __virtscr->maxy - 1; bot >= 0; bot--) 874 if (__virtscr->lines[bot]->flags & __ISDIRTY && 875 (__virtscr->lines[bot]->hash != curscr->lines[bot]->hash || 876 memcmp(__virtscr->lines[bot]->line, 877 curscr->lines[bot]->line, 878 (size_t) __virtscr->maxx * __LDATASIZE) != 0)) 879 break; 880 else 881 __virtscr->lines[bot]->flags &= ~__ISDIRTY; 882 883 /* 884 * Work round an xterm bug where inserting lines causes all the 885 * inserted lines to be covered with the background colour we 886 * set on the first line (even if we unset it for subsequent 887 * lines). 888 */ 889 bcolor = __virtscr->lines[min(top, 890 __virtscr->maxy - 1)]->line[0].attr & __COLOR; 891 for (i = top + 1, j = 0; i < bot; i++) { 892 if ((__virtscr->lines[i]->line[0].attr & __COLOR) != bcolor) { 893 bcolor = __virtscr->lines[i]->line[__virtscr->maxx]. 894 attr & __COLOR; 895 j = i - top; 896 } else 897 break; 898 } 899 top += j; 900 901 #ifdef NO_JERKINESS 902 /* 903 * If we have a bottom unchanged region return. Scrolling the 904 * bottom region up and then back down causes a screen jitter. 905 * This will increase the number of characters sent to the screen 906 * but it looks better. 907 */ 908 if (bot < __virtscr->maxy - 1) 909 return; 910 #endif /* NO_JERKINESS */ 911 912 /* 913 * Search for the largest block of text not changed. 914 * Invariants of the loop: 915 * - Startw is the index of the beginning of the examined block in 916 * __virtscr. 917 * - Starts is the index of the beginning of the examined block in 918 * curscr. 919 * - Curw is the index of one past the end of the exmined block in 920 * __virtscr. 921 * - Curs is the index of one past the end of the exmined block in 922 * curscr. 923 * - bsize is the current size of the examined block. 924 */ 925 926 for (bsize = bot - top; bsize >= THRESH; bsize--) { 927 for (startw = top; startw <= bot - bsize; startw++) 928 for (starts = top; starts <= bot - bsize; 929 starts++) { 930 for (curw = startw, curs = starts; 931 curs < starts + bsize; curw++, curs++) 932 if (__virtscr->lines[curw]->hash != 933 curscr->lines[curs]->hash) 934 break; 935 if (curs != starts + bsize) 936 continue; 937 for (curw = startw, curs = starts; 938 curs < starts + bsize; curw++, curs++) 939 if (memcmp(__virtscr->lines[curw]->line, 940 curscr->lines[curs]->line, 941 (size_t) __virtscr->maxx * 942 __LDATASIZE) != 0) 943 break; 944 if (curs == starts + bsize) 945 goto done; 946 } 947 } 948 done: 949 950 /* Did not find anything */ 951 if (bsize < THRESH) 952 return; 953 954 #ifdef DEBUG 955 __CTRACE("quickch:bsize=%d,starts=%d,startw=%d,curw=%d,curs=%d,top=%d,bot=%d\n", 956 bsize, starts, startw, curw, curs, top, bot); 957 #endif 958 959 /* 960 * Make sure that there is no overlap between the bottom and top 961 * regions and the middle scrolled block. 962 */ 963 if (bot < curs) 964 bot = curs - 1; 965 if (top > starts) 966 top = starts; 967 968 n = startw - starts; 969 970 #ifdef DEBUG 971 __CTRACE("#####################################\n"); 972 for (i = 0; i < curscr->maxy; i++) { 973 __CTRACE("C: %d:", i); 974 __CTRACE(" 0x%x \n", curscr->lines[i]->hash); 975 for (j = 0; j < curscr->maxx; j++) 976 __CTRACE("%c", curscr->lines[i]->line[j].ch); 977 __CTRACE("\n"); 978 __CTRACE(" attr:"); 979 for (j = 0; j < curscr->maxx; j++) 980 __CTRACE(" %x", curscr->lines[i]->line[j].attr); 981 __CTRACE("\n"); 982 __CTRACE("W: %d:", i); 983 __CTRACE(" 0x%x \n", __virtscr->lines[i]->hash); 984 __CTRACE(" 0x%x ", __virtscr->lines[i]->flags); 985 for (j = 0; j < __virtscr->maxx; j++) 986 __CTRACE("%c", __virtscr->lines[i]->line[j].ch); 987 __CTRACE("\n"); 988 __CTRACE(" attr:"); 989 for (j = 0; j < __virtscr->maxx; j++) 990 __CTRACE(" %x", __virtscr->lines[i]->line[j].attr); 991 __CTRACE("\n"); 992 } 993 #endif 994 995 if (buf[0].ch != ' ') { 996 for (i = 0; i < BLANKSIZE; i++) { 997 buf[i].ch = ' '; 998 buf[i].bch = ' '; 999 buf[i].attr = 0; 1000 buf[i].battr = 0; 1001 } 1002 } 1003 1004 if (__virtscr->maxx != last_hash_len) { 1005 blank_hash = 0; 1006 for (i = __virtscr->maxx; i > BLANKSIZE; i -= BLANKSIZE) { 1007 blank_hash = __hash_more((char *)(void *)buf, sizeof(buf), 1008 blank_hash); 1009 } 1010 blank_hash = __hash_more((char *)(void *)buf, 1011 i * sizeof(buf[0]), blank_hash); 1012 /* cache result in static data - screen width doesn't change often */ 1013 last_hash_len = __virtscr->maxx; 1014 last_hash = blank_hash; 1015 } else 1016 blank_hash = last_hash; 1017 1018 /* 1019 * Perform the rotation to maintain the consistency of curscr. 1020 * This is hairy since we are doing an *in place* rotation. 1021 * Invariants of the loop: 1022 * - I is the index of the current line. 1023 * - Target is the index of the target of line i. 1024 * - Tmp1 points to current line (i). 1025 * - Tmp2 and points to target line (target); 1026 * - Cur_period is the index of the end of the current period. 1027 * (see below). 1028 * 1029 * There are 2 major issues here that make this rotation non-trivial: 1030 * 1. Scrolling in a scrolling region bounded by the top 1031 * and bottom regions determined (whose size is sc_region). 1032 * 2. As a result of the use of the mod function, there may be a 1033 * period introduced, i.e., 2 maps to 4, 4 to 6, n-2 to 0, and 1034 * 0 to 2, which then causes all odd lines not to be rotated. 1035 * To remedy this, an index of the end ( = beginning) of the 1036 * current 'period' is kept, cur_period, and when it is reached, 1037 * the next period is started from cur_period + 1 which is 1038 * guaranteed not to have been reached since that would mean that 1039 * all records would have been reached. (think about it...). 1040 * 1041 * Lines in the rotation can have 3 attributes which are marked on the 1042 * line so that curscr is consistent with the visual screen. 1043 * 1. Not dirty -- lines inside the scrolled block, top region or 1044 * bottom region. 1045 * 2. Blank lines -- lines in the differential of the scrolling 1046 * region adjacent to top and bot regions 1047 * depending on scrolling direction. 1048 * 3. Dirty line -- all other lines are marked dirty. 1049 */ 1050 sc_region = bot - top + 1; 1051 i = top; 1052 tmp1 = curscr->lines[top]; 1053 cur_period = top; 1054 for (j = top; j <= bot; j++) { 1055 target = (i - top + n + sc_region) % sc_region + top; 1056 tmp2 = curscr->lines[target]; 1057 curscr->lines[target] = tmp1; 1058 /* Mark block as clean and blank out scrolled lines. */ 1059 clp = curscr->lines[target]; 1060 #ifdef DEBUG 1061 __CTRACE("quickch: n=%d startw=%d curw=%d i = %d target=%d ", 1062 n, startw, curw, i, target); 1063 #endif 1064 if ((target >= startw && target < curw) || target < top 1065 || target > bot) { 1066 #ifdef DEBUG 1067 __CTRACE("-- notdirty\n"); 1068 #endif 1069 __virtscr->lines[target]->flags &= ~__ISDIRTY; 1070 } else 1071 if ((n > 0 && target >= top && target < top + n) || 1072 (n < 0 && target <= bot && target > bot + n)) { 1073 if (clp->hash != blank_hash || memcmp(clp->line, 1074 clp->line + 1, (__virtscr->maxx - 1) * 1075 __LDATASIZE) || memcmp(clp->line, buf, 1076 __LDATASIZE)) { 1077 for (i = __virtscr->maxx; i > BLANKSIZE; 1078 i -= BLANKSIZE) { 1079 (void)memcpy(clp->line + i - 1080 BLANKSIZE, buf, sizeof(buf)); 1081 } 1082 (void)memcpy(clp->line , buf, i * 1083 sizeof(buf[0])); 1084 #ifdef DEBUG 1085 __CTRACE("-- blanked out: dirty\n"); 1086 #endif 1087 clp->hash = blank_hash; 1088 __touchline(__virtscr, target, 0, (int) __virtscr->maxx - 1); 1089 } else { 1090 #ifdef DEBUG 1091 __CTRACE(" -- blank line already: dirty\n"); 1092 #endif 1093 __touchline(__virtscr, target, 0, (int) __virtscr->maxx - 1); 1094 } 1095 } else { 1096 #ifdef DEBUG 1097 __CTRACE(" -- dirty\n"); 1098 #endif 1099 __touchline(__virtscr, target, 0, (int) __virtscr->maxx - 1); 1100 } 1101 if (target == cur_period) { 1102 i = target + 1; 1103 tmp1 = curscr->lines[i]; 1104 cur_period = i; 1105 } else { 1106 tmp1 = tmp2; 1107 i = target; 1108 } 1109 } 1110 #ifdef DEBUG 1111 __CTRACE("$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$\n"); 1112 for (i = 0; i < curscr->maxy; i++) { 1113 __CTRACE("C: %d:", i); 1114 for (j = 0; j < curscr->maxx; j++) 1115 __CTRACE("%c", curscr->lines[i]->line[j].ch); 1116 __CTRACE("\n"); 1117 __CTRACE("W: %d:", i); 1118 for (j = 0; j < __virtscr->maxx; j++) 1119 __CTRACE("%c", __virtscr->lines[i]->line[j].ch); 1120 __CTRACE("\n"); 1121 } 1122 #endif 1123 if (n != 0) 1124 scrolln(starts, startw, curs, bot, top); 1125 } 1126 1127 /* 1128 * scrolln -- 1129 * Scroll n lines, where n is starts - startw. 1130 */ 1131 static void /* ARGSUSED */ 1132 scrolln(starts, startw, curs, bot, top) 1133 int starts, startw, curs, bot, top; 1134 { 1135 int i, oy, ox, n; 1136 1137 oy = curscr->cury; 1138 ox = curscr->curx; 1139 n = starts - startw; 1140 1141 /* 1142 * XXX 1143 * The initial tests that set __noqch don't let us reach here unless 1144 * we have either cs + ho + SF/sf/SR/sr, or AL + DL. SF/sf and SR/sr 1145 * scrolling can only shift the entire scrolling region, not just a 1146 * part of it, which means that the quickch() routine is going to be 1147 * sadly disappointed in us if we don't have cs as well. 1148 * 1149 * If cs, ho and SF/sf are set, can use the scrolling region. Because 1150 * the cursor position after cs is undefined, we need ho which gives us 1151 * the ability to move to somewhere without knowledge of the current 1152 * location of the cursor. Still call __mvcur() anyway, to update its 1153 * idea of where the cursor is. 1154 * 1155 * When the scrolling region has been set, the cursor has to be at the 1156 * last line of the region to make the scroll happen. 1157 * 1158 * Doing SF/SR or AL/DL appears faster on the screen than either sf/sr 1159 * or AL/DL, and, some terminals have AL/DL, sf/sr, and cs, but not 1160 * SF/SR. So, if we're scrolling almost all of the screen, try and use 1161 * AL/DL, otherwise use the scrolling region. The "almost all" is a 1162 * shameless hack for vi. 1163 */ 1164 if (n > 0) { 1165 if (__tc_cs != NULL && __tc_ho != NULL && (__tc_SF != NULL || 1166 ((__tc_AL == NULL || __tc_DL == NULL || 1167 top > 3 || bot + 3 < __virtscr->maxy) && 1168 __tc_sf != NULL))) { 1169 tputs(__tscroll(__tc_cs, top, bot + 1), 0, __cputchar); 1170 __mvcur(oy, ox, 0, 0, 1); 1171 tputs(__tc_ho, 0, __cputchar); 1172 __mvcur(0, 0, bot, 0, 1); 1173 if (__tc_SF != NULL) 1174 tputs(__tscroll(__tc_SF, n, 0), 0, __cputchar); 1175 else 1176 for (i = 0; i < n; i++) 1177 tputs(__tc_sf, 0, __cputchar); 1178 tputs(__tscroll(__tc_cs, 0, (int) __virtscr->maxy), 0, 1179 __cputchar); 1180 __mvcur(bot, 0, 0, 0, 1); 1181 tputs(__tc_ho, 0, __cputchar); 1182 __mvcur(0, 0, oy, ox, 1); 1183 return; 1184 } 1185 1186 /* Scroll up the block. */ 1187 if (__tc_SF != NULL && top == 0) { 1188 __mvcur(oy, ox, bot, 0, 1); 1189 tputs(__tscroll(__tc_SF, n, 0), 0, __cputchar); 1190 } else 1191 if (__tc_DL != NULL) { 1192 __mvcur(oy, ox, top, 0, 1); 1193 tputs(__tscroll(__tc_DL, n, 0), 0, __cputchar); 1194 } else 1195 if (__tc_dl != NULL) { 1196 __mvcur(oy, ox, top, 0, 1); 1197 for (i = 0; i < n; i++) 1198 tputs(__tc_dl, 0, __cputchar); 1199 } else 1200 if (__tc_sf != NULL && top == 0) { 1201 __mvcur(oy, ox, bot, 0, 1); 1202 for (i = 0; i < n; i++) 1203 tputs(__tc_sf, 0, 1204 __cputchar); 1205 } else 1206 abort(); 1207 1208 /* Push down the bottom region. */ 1209 __mvcur(top, 0, bot - n + 1, 0, 1); 1210 if (__tc_AL != NULL) 1211 tputs(__tscroll(__tc_AL, n, 0), 0, __cputchar); 1212 else 1213 if (__tc_al != NULL) 1214 for (i = 0; i < n; i++) 1215 tputs(__tc_al, 0, __cputchar); 1216 else 1217 abort(); 1218 __mvcur(bot - n + 1, 0, oy, ox, 1); 1219 } else { 1220 /* 1221 * !!! 1222 * n < 0 1223 * 1224 * If cs, ho and SR/sr are set, can use the scrolling region. 1225 * See the above comments for details. 1226 */ 1227 if (__tc_cs != NULL && __tc_ho != NULL && (__tc_SR != NULL || 1228 ((__tc_AL == NULL || __tc_DL == NULL || top > 3 || 1229 bot + 3 < __virtscr->maxy) && __tc_sr != NULL))) { 1230 tputs(__tscroll(__tc_cs, top, bot + 1), 0, __cputchar); 1231 __mvcur(oy, ox, 0, 0, 1); 1232 tputs(__tc_ho, 0, __cputchar); 1233 __mvcur(0, 0, top, 0, 1); 1234 1235 if (__tc_SR != NULL) 1236 tputs(__tscroll(__tc_SR, -n, 0), 0, __cputchar); 1237 else 1238 for (i = n; i < 0; i++) 1239 tputs(__tc_sr, 0, __cputchar); 1240 tputs(__tscroll(__tc_cs, 0, (int) __virtscr->maxy), 0, 1241 __cputchar); 1242 __mvcur(top, 0, 0, 0, 1); 1243 tputs(__tc_ho, 0, __cputchar); 1244 __mvcur(0, 0, oy, ox, 1); 1245 return; 1246 } 1247 1248 /* Preserve the bottom lines. */ 1249 __mvcur(oy, ox, bot + n + 1, 0, 1); 1250 if (__tc_SR != NULL && bot == __virtscr->maxy) 1251 tputs(__tscroll(__tc_SR, -n, 0), 0, __cputchar); 1252 else 1253 if (__tc_DL != NULL) 1254 tputs(__tscroll(__tc_DL, -n, 0), 0, __cputchar); 1255 else 1256 if (__tc_dl != NULL) 1257 for (i = n; i < 0; i++) 1258 tputs(__tc_dl, 0, __cputchar); 1259 else 1260 if (__tc_sr != NULL && 1261 bot == __virtscr->maxy) 1262 for (i = n; i < 0; i++) 1263 tputs(__tc_sr, 0, 1264 __cputchar); 1265 else 1266 abort(); 1267 1268 /* Scroll the block down. */ 1269 __mvcur(bot + n + 1, 0, top, 0, 1); 1270 if (__tc_AL != NULL) 1271 tputs(__tscroll(__tc_AL, -n, 0), 0, __cputchar); 1272 else 1273 if (__tc_al != NULL) 1274 for (i = n; i < 0; i++) 1275 tputs(__tc_al, 0, __cputchar); 1276 else 1277 abort(); 1278 __mvcur(top, 0, oy, ox, 1); 1279 } 1280 } 1281 1282 /* 1283 * __unsetattr -- 1284 * Unset attributes on curscr. Leave standout, attribute and colour 1285 * modes if necessary (!ms). Always leave altcharset (xterm at least 1286 * ignores a cursor move if we don't). 1287 */ 1288 void /* ARGSUSED */ 1289 __unsetattr(int checkms) 1290 { 1291 int isms; 1292 1293 if (checkms) 1294 if (!__tc_ms) { 1295 isms = 1; 1296 } else { 1297 isms = 0; 1298 } 1299 else 1300 isms = 1; 1301 #ifdef DEBUG 1302 __CTRACE("__unsetattr: checkms = %d, ms = %s, wattr = %08x\n", 1303 checkms, __tc_ms ? "TRUE" : "FALSE", curscr->wattr); 1304 #endif 1305 1306 /* 1307 * Don't leave the screen in standout mode (check against ms). Check 1308 * to see if we also turn off underscore, attributes and colour. 1309 */ 1310 if (curscr->wattr & __STANDOUT && isms) { 1311 tputs(__tc_se, 0, __cputchar); 1312 curscr->wattr &= __mask_se; 1313 } 1314 /* 1315 * Don't leave the screen in underscore mode (check against ms). 1316 * Check to see if we also turn off attributes. Assume that we 1317 * also turn off colour. 1318 */ 1319 if (curscr->wattr & __UNDERSCORE && isms) { 1320 tputs(__tc_ue, 0, __cputchar); 1321 curscr->wattr &= __mask_ue; 1322 } 1323 /* 1324 * Don't leave the screen with attributes set (check against ms). 1325 * Assume that also turn off colour. 1326 */ 1327 if (curscr->wattr & __TERMATTR && isms) { 1328 tputs(__tc_me, 0, __cputchar); 1329 curscr->wattr &= __mask_me; 1330 } 1331 /* Don't leave the screen with altcharset set (don't check ms). */ 1332 if (curscr->wattr & __ALTCHARSET) { 1333 tputs(__tc_ae, 0, __cputchar); 1334 curscr->wattr &= ~__ALTCHARSET; 1335 } 1336 /* Don't leave the screen with colour set (check against ms). */ 1337 if (__using_color && isms) 1338 __unset_color(curscr); 1339 } 1340