cl_funcs.c revision 281373
1186691Sobrien/*- 2234449Sobrien * Copyright (c) 1993, 1994 3186691Sobrien * The Regents of the University of California. All rights reserved. 4186691Sobrien * Copyright (c) 1993, 1994, 1995, 1996 5234449Sobrien * Keith Bostic. All rights reserved. 6234449Sobrien * 768349Sobrien * See the LICENSE file for redistribution information. 8186691Sobrien */ 968349Sobrien 10234449Sobrien#include "config.h" 11234449Sobrien 12234449Sobrien#ifndef lint 13186691Sobrienstatic const char sccsid[] = "$Id: cl_funcs.c,v 10.74 2012/10/11 10:30:16 zy Exp $"; 14186691Sobrien#endif /* not lint */ 15186691Sobrien 16186691Sobrien#include <sys/types.h> 17186691Sobrien#include <sys/queue.h> 18186691Sobrien#include <sys/time.h> 19186691Sobrien 20186691Sobrien#include <bitstring.h> 21186691Sobrien#include <ctype.h> 22186691Sobrien#include <signal.h> 23186691Sobrien#include <stdio.h> 24186691Sobrien#include <stdlib.h> 25234449Sobrien#include <string.h> 26186691Sobrien#ifdef HAVE_TERM_H 27186691Sobrien#include <term.h> 28186691Sobrien#endif 29186691Sobrien#include <termios.h> 30186691Sobrien#include <unistd.h> 31234449Sobrien 32186691Sobrien#include "../common/common.h" 33186691Sobrien#include "../vi/vi.h" 34186691Sobrien#include "cl.h" 35186691Sobrien 36234449Sobrienstatic void cl_rdiv(SCR *); 37186691Sobrien 38186691Sobrienstatic int 39186691Sobrienaddstr4(SCR *sp, void *str, size_t len, int wide) 40186691Sobrien{ 41186691Sobrien CL_PRIVATE *clp; 42186691Sobrien WINDOW *win; 43186691Sobrien size_t y, x; 44186691Sobrien int iv; 45186691Sobrien 46186691Sobrien clp = CLP(sp); 47186691Sobrien win = CLSP(sp) ? CLSP(sp) : stdscr; 48186691Sobrien 49186691Sobrien /* 50186691Sobrien * If ex isn't in control, it's the last line of the screen and 51186691Sobrien * it's a split screen, use inverse video. 52186691Sobrien */ 53186691Sobrien iv = 0; 54186691Sobrien getyx(win, y, x); 55186691Sobrien if (!F_ISSET(sp, SC_SCR_EXWROTE) && 56234449Sobrien y == RLNO(sp, LASTLINE(sp)) && IS_SPLIT(sp)) { 57186691Sobrien iv = 1; 58186691Sobrien (void)wstandout(win); 59186691Sobrien } 60186691Sobrien 61186691Sobrien#ifdef USE_WIDECHAR 62186691Sobrien if (wide) { 63186691Sobrien if (waddnwstr(win, str, len) == ERR) 64186691Sobrien return (1); 65234449Sobrien } else 66186691Sobrien#endif 67186691Sobrien if (waddnstr(win, str, len) == ERR) 68186691Sobrien return (1); 69186691Sobrien 70186691Sobrien if (iv) 71186691Sobrien (void)wstandend(win); 72186691Sobrien return (0); 73186691Sobrien} 74186691Sobrien 75186691Sobrien/* 76186691Sobrien * cl_waddstr -- 77186691Sobrien * Add len bytes from the string at the cursor, advancing the cursor. 78186691Sobrien * 79186691Sobrien * PUBLIC: int cl_waddstr(SCR *, const CHAR_T *, size_t); 80186691Sobrien */ 81234449Sobrienint 82186691Sobriencl_waddstr(SCR *sp, const CHAR_T *str, size_t len) 83186691Sobrien{ 84234449Sobrien return addstr4(sp, (void *)str, len, 1); 85186691Sobrien} 86186691Sobrien 87186691Sobrien/* 88186691Sobrien * cl_addstr -- 89186691Sobrien * Add len bytes from the string at the cursor, advancing the cursor. 90186691Sobrien * 91186691Sobrien * PUBLIC: int cl_addstr(SCR *, const char *, size_t); 92186691Sobrien */ 93234449Sobrienint 94186691Sobriencl_addstr(SCR *sp, const char *str, size_t len) 95186691Sobrien{ 96186691Sobrien return addstr4(sp, (void *)str, len, 0); 97186691Sobrien} 98186691Sobrien 99186691Sobrien/* 100186691Sobrien * cl_attr -- 101186691Sobrien * Toggle a screen attribute on/off. 102186691Sobrien * 103186691Sobrien * PUBLIC: int cl_attr(SCR *, scr_attr_t, int); 104186691Sobrien */ 105186691Sobrienint 106234449Sobriencl_attr(SCR *sp, scr_attr_t attribute, int on) 107186691Sobrien{ 108186691Sobrien CL_PRIVATE *clp; 109186691Sobrien WINDOW *win; 110186691Sobrien 111192350Sdelphij clp = CLP(sp); 112186691Sobrien win = CLSP(sp) ? CLSP(sp) : stdscr; 113186691Sobrien 114186691Sobrien switch (attribute) { 115186691Sobrien case SA_ALTERNATE: 116186691Sobrien /* 117186691Sobrien * !!! 118186691Sobrien * There's a major layering violation here. The problem is that the 119186691Sobrien * X11 xterm screen has what's known as an "alternate" screen. Some 120234449Sobrien * xterm termcap/terminfo entries include sequences to switch to/from 121186691Sobrien * that alternate screen as part of the ti/te (smcup/rmcup) strings. 122186691Sobrien * Vi runs in the alternate screen, so that you are returned to the 123186691Sobrien * same screen contents on exit from vi that you had when you entered 124186691Sobrien * vi. Further, when you run :shell, or :!date or similar ex commands, 125234449Sobrien * you also see the original screen contents. This wasn't deliberate 126186691Sobrien * on vi's part, it's just that it historically sent terminal init/end 127234449Sobrien * sequences at those times, and the addition of the alternate screen 128186691Sobrien * sequences to the strings changed the behavior of vi. The problem 129186691Sobrien * caused by this is that we don't want to switch back to the alternate 130186691Sobrien * screen while getting a new command from the user, when the user is 131186691Sobrien * continuing to enter ex commands, e.g.: 132186691Sobrien * 133234449Sobrien * :!date <<< switch to original screen 134186691Sobrien * [Hit return to continue] <<< prompt user to continue 135186691Sobrien * :command <<< get command from user 136186691Sobrien * 137186691Sobrien * Note that the :command input is a true vi input mode, e.g., input 138186691Sobrien * maps and abbreviations are being done. So, we need to be able to 139186691Sobrien * switch back into the vi screen mode, without flashing the screen. 140186691Sobrien * 141186691Sobrien * To make matters worse, the curses initscr() and endwin() calls will 142186691Sobrien * do this automatically -- so, this attribute isn't as controlled by 143186691Sobrien * the higher level screen as closely as one might like. 144186691Sobrien */ 145234449Sobrien if (on) { 146186691Sobrien if (clp->ti_te != TI_SENT) { 147186691Sobrien clp->ti_te = TI_SENT; 148234449Sobrien if (clp->smcup == NULL) 149186691Sobrien (void)cl_getcap(sp, "smcup", &clp->smcup); 150186691Sobrien if (clp->smcup != NULL) 151186691Sobrien (void)tputs(clp->smcup, 1, cl_putchar); 152186691Sobrien } 153186691Sobrien } else 154186691Sobrien if (clp->ti_te != TE_SENT) { 155186691Sobrien clp->ti_te = TE_SENT; 156234449Sobrien if (clp->rmcup == NULL) 157186691Sobrien (void)cl_getcap(sp, "rmcup", &clp->rmcup); 158186691Sobrien if (clp->rmcup != NULL) 159186691Sobrien (void)tputs(clp->rmcup, 1, cl_putchar); 160186691Sobrien (void)fflush(stdout); 161186691Sobrien } 162186691Sobrien (void)fflush(stdout); 163186691Sobrien break; 164186691Sobrien case SA_INVERSE: 165186691Sobrien if (F_ISSET(sp, SC_EX | SC_SCR_EXWROTE)) { 166186691Sobrien if (clp->smso == NULL) 167234449Sobrien return (1); 168234449Sobrien if (on) 169186691Sobrien (void)tputs(clp->smso, 1, cl_putchar); 170186691Sobrien else 171186691Sobrien (void)tputs(clp->rmso, 1, cl_putchar); 172186691Sobrien (void)fflush(stdout); 173186691Sobrien } else { 174186691Sobrien if (on) 175186691Sobrien (void)wstandout(win); 176186691Sobrien else 177186691Sobrien (void)wstandend(win); 178186691Sobrien } 179186691Sobrien break; 180186691Sobrien default: 181186691Sobrien abort(); 182186691Sobrien } 183186691Sobrien return (0); 184186691Sobrien} 185234449Sobrien 186186691Sobrien/* 187186691Sobrien * cl_baud -- 188186691Sobrien * Return the baud rate. 189186691Sobrien * 190186691Sobrien * PUBLIC: int cl_baud(SCR *, u_long *); 191186691Sobrien */ 192186691Sobrienint 193234449Sobriencl_baud(SCR *sp, u_long *ratep) 194186691Sobrien{ 195186691Sobrien CL_PRIVATE *clp; 196186691Sobrien 197186691Sobrien /* 198186691Sobrien * XXX 199186691Sobrien * There's no portable way to get a "baud rate" -- cfgetospeed(3) 200234449Sobrien * returns the value associated with some #define, which we may 201186691Sobrien * never have heard of, or which may be a purely local speed. Vi 202186691Sobrien * only cares if it's SLOW (w300), slow (w1200) or fast (w9600). 203234449Sobrien * Try and detect the slow ones, and default to fast. 204186691Sobrien */ 205186691Sobrien clp = CLP(sp); 206186691Sobrien switch (cfgetospeed(&clp->orig)) { 207186691Sobrien case B50: 208186691Sobrien case B75: 209234449Sobrien case B110: 210234449Sobrien case B134: 211186691Sobrien case B150: 212186691Sobrien case B200: 213234449Sobrien case B300: 214186691Sobrien case B600: 215186691Sobrien *ratep = 600; 216186691Sobrien break; 217186691Sobrien case B1200: 218186691Sobrien *ratep = 1200; 219186691Sobrien break; 220186691Sobrien default: 221186691Sobrien *ratep = 9600; 222186691Sobrien break; 223186691Sobrien } 224186691Sobrien return (0); 225186691Sobrien} 226186691Sobrien 227186691Sobrien/* 228186691Sobrien * cl_bell -- 229186691Sobrien * Ring the bell/flash the screen. 230234449Sobrien * 231186691Sobrien * PUBLIC: int cl_bell(SCR *); 232186691Sobrien */ 233186691Sobrienint 234186691Sobriencl_bell(SCR *sp) 235186691Sobrien{ 236186691Sobrien if (F_ISSET(sp, SC_EX | SC_SCR_EXWROTE | SC_SCR_EX)) 237186691Sobrien (void)write(STDOUT_FILENO, "\07", 1); /* \a */ 238186691Sobrien else { 239186691Sobrien /* 240191771Sobrien * Vi has an edit option which determines if the terminal 241186691Sobrien * should be beeped or the screen flashed. 242234449Sobrien */ 243186691Sobrien if (O_ISSET(sp, O_FLASH)) 244186691Sobrien (void)flash(); 245186691Sobrien else 246186691Sobrien (void)beep(); 247186691Sobrien } 248234449Sobrien return (0); 249186691Sobrien} 250186691Sobrien 25168349Sobrien/* 252186691Sobrien * cl_clrtoeol -- 253234449Sobrien * Clear from the current cursor to the end of the line. 25468349Sobrien * 255186691Sobrien * PUBLIC: int cl_clrtoeol(SCR *); 256234449Sobrien */ 257159764Sobrienint 258159764Sobriencl_clrtoeol(SCR *sp) 259186691Sobrien{ 260159764Sobrien WINDOW *win; 261159764Sobrien#if 0 262186691Sobrien size_t spcnt, y, x; 263159764Sobrien#endif 264159764Sobrien 265186691Sobrien win = CLSP(sp) ? CLSP(sp) : stdscr; 266234449Sobrien 267234449Sobrien#if 0 268234449Sobrien if (IS_VSPLIT(sp)) { 269234449Sobrien /* The cursor must be returned to its original position. */ 270234449Sobrien getyx(win, y, x); 271234449Sobrien for (spcnt = (sp->coff + sp->cols) - x; spcnt > 0; --spcnt) 272234449Sobrien (void)waddch(win, ' '); 273234449Sobrien (void)wmove(win, y, x); 274234449Sobrien return (0); 275234449Sobrien } else 276234449Sobrien#endif 277234449Sobrien return (wclrtoeol(win) == ERR); 278234449Sobrien} 279234449Sobrien 280234449Sobrien/* 281 * cl_cursor -- 282 * Return the current cursor position. 283 * 284 * PUBLIC: int cl_cursor(SCR *, size_t *, size_t *); 285 */ 286int 287cl_cursor(SCR *sp, size_t *yp, size_t *xp) 288{ 289 WINDOW *win; 290 win = CLSP(sp) ? CLSP(sp) : stdscr; 291 /* 292 * The curses screen support splits a single underlying curses screen 293 * into multiple screens to support split screen semantics. For this 294 * reason the returned value must be adjusted to be relative to the 295 * current screen, and not absolute. Screens that implement the split 296 * using physically distinct screens won't need this hack. 297 */ 298 getyx(win, *yp, *xp); 299 /* 300 *yp -= sp->roff; 301 *xp -= sp->coff; 302 */ 303 return (0); 304} 305 306/* 307 * cl_deleteln -- 308 * Delete the current line, scrolling all lines below it. 309 * 310 * PUBLIC: int cl_deleteln(SCR *); 311 */ 312int 313cl_deleteln(SCR *sp) 314{ 315 CL_PRIVATE *clp; 316 WINDOW *win; 317 size_t y, x; 318 319 clp = CLP(sp); 320 win = CLSP(sp) ? CLSP(sp) : stdscr; 321 322 /* 323 * This clause is required because the curses screen uses reverse 324 * video to delimit split screens. If the screen does not do this, 325 * this code won't be necessary. 326 * 327 * If the bottom line was in reverse video, rewrite it in normal 328 * video before it's scrolled. 329 */ 330 if (!F_ISSET(sp, SC_SCR_EXWROTE) && IS_SPLIT(sp)) { 331 getyx(win, y, x); 332 mvwchgat(win, RLNO(sp, LASTLINE(sp)), 0, -1, A_NORMAL, 0, NULL); 333 (void)wmove(win, y, x); 334 } 335 336 /* 337 * The bottom line is expected to be blank after this operation, 338 * and other screens must support that semantic. 339 */ 340 return (wdeleteln(win) == ERR); 341} 342 343/* 344 * cl_discard -- 345 * Discard a screen. 346 * 347 * PUBLIC: int cl_discard(SCR *, SCR **); 348 */ 349int 350cl_discard(SCR *discardp, SCR **acquirep) 351{ 352 CL_PRIVATE *clp; 353 SCR* tsp; 354 355 if (discardp) { 356 clp = CLP(discardp); 357 F_SET(clp, CL_LAYOUT); 358 359 if (CLSP(discardp)) { 360 delwin(CLSP(discardp)); 361 discardp->cl_private = NULL; 362 } 363 } 364 365 /* no screens got a piece; we're done */ 366 if (!acquirep) 367 return 0; 368 369 for (; (tsp = *acquirep) != NULL; ++acquirep) { 370 clp = CLP(tsp); 371 F_SET(clp, CL_LAYOUT); 372 373 if (CLSP(tsp)) 374 delwin(CLSP(tsp)); 375 tsp->cl_private = subwin(stdscr, tsp->rows, tsp->cols, 376 tsp->roff, tsp->coff); 377 } 378 379 /* discardp is going away, acquirep is taking up its space. */ 380 return (0); 381} 382 383/* 384 * cl_ex_adjust -- 385 * Adjust the screen for ex. This routine is purely for standalone 386 * ex programs. All special purpose, all special case. 387 * 388 * PUBLIC: int cl_ex_adjust(SCR *, exadj_t); 389 */ 390int 391cl_ex_adjust(SCR *sp, exadj_t action) 392{ 393 CL_PRIVATE *clp; 394 int cnt; 395 396 clp = CLP(sp); 397 switch (action) { 398 case EX_TERM_SCROLL: 399 /* Move the cursor up one line if that's possible. */ 400 if (clp->cuu1 != NULL) 401 (void)tputs(clp->cuu1, 1, cl_putchar); 402 else if (clp->cup != NULL) 403 (void)tputs(tgoto(clp->cup, 404 0, LINES - 2), 1, cl_putchar); 405 else 406 return (0); 407 /* FALLTHROUGH */ 408 case EX_TERM_CE: 409 /* Clear the line. */ 410 if (clp->el != NULL) { 411 (void)putchar('\r'); 412 (void)tputs(clp->el, 1, cl_putchar); 413 } else { 414 /* 415 * Historically, ex didn't erase the line, so, if the 416 * displayed line was only a single glyph, and <eof> 417 * was more than one glyph, the output would not fully 418 * overwrite the user's input. To fix this, output 419 * the maxiumum character number of spaces. Note, 420 * this won't help if the user entered extra prompt 421 * or <blank> characters before the command character. 422 * We'd have to do a lot of work to make that work, and 423 * it's almost certainly not worth the effort. 424 */ 425 for (cnt = 0; cnt < MAX_CHARACTER_COLUMNS; ++cnt) 426 (void)putchar('\b'); 427 for (cnt = 0; cnt < MAX_CHARACTER_COLUMNS; ++cnt) 428 (void)putchar(' '); 429 (void)putchar('\r'); 430 (void)fflush(stdout); 431 } 432 break; 433 default: 434 abort(); 435 } 436 return (0); 437} 438 439/* 440 * cl_insertln -- 441 * Push down the current line, discarding the bottom line. 442 * 443 * PUBLIC: int cl_insertln(SCR *); 444 */ 445int 446cl_insertln(SCR *sp) 447{ 448 WINDOW *win; 449 win = CLSP(sp) ? CLSP(sp) : stdscr; 450 /* 451 * The current line is expected to be blank after this operation, 452 * and the screen must support that semantic. 453 */ 454 return (winsertln(win) == ERR); 455} 456 457/* 458 * cl_keyval -- 459 * Return the value for a special key. 460 * 461 * PUBLIC: int cl_keyval(SCR *, scr_keyval_t, CHAR_T *, int *); 462 */ 463int 464cl_keyval(SCR *sp, scr_keyval_t val, CHAR_T *chp, int *dnep) 465{ 466 CL_PRIVATE *clp; 467 468 /* 469 * VEOF, VERASE and VKILL are required by POSIX 1003.1-1990, 470 * VWERASE is a 4BSD extension. 471 */ 472 clp = CLP(sp); 473 switch (val) { 474 case KEY_VEOF: 475 *dnep = (*chp = clp->orig.c_cc[VEOF]) == _POSIX_VDISABLE; 476 break; 477 case KEY_VERASE: 478 *dnep = (*chp = clp->orig.c_cc[VERASE]) == _POSIX_VDISABLE; 479 break; 480 case KEY_VKILL: 481 *dnep = (*chp = clp->orig.c_cc[VKILL]) == _POSIX_VDISABLE; 482 break; 483#ifdef VWERASE 484 case KEY_VWERASE: 485 *dnep = (*chp = clp->orig.c_cc[VWERASE]) == _POSIX_VDISABLE; 486 break; 487#endif 488 default: 489 *dnep = 1; 490 break; 491 } 492 return (0); 493} 494 495/* 496 * cl_move -- 497 * Move the cursor. 498 * 499 * PUBLIC: int cl_move(SCR *, size_t, size_t); 500 */ 501int 502cl_move(SCR *sp, size_t lno, size_t cno) 503{ 504 WINDOW *win; 505 win = CLSP(sp) ? CLSP(sp) : stdscr; 506 /* See the comment in cl_cursor. */ 507 if (wmove(win, RLNO(sp, lno), RCNO(sp, cno)) == ERR) { 508 msgq(sp, M_ERR, "Error: move: l(%zu + %zu) c(%zu + %zu)", 509 lno, sp->roff, cno, sp->coff); 510 return (1); 511 } 512 return (0); 513} 514 515/* 516 * cl_refresh -- 517 * Refresh the screen. 518 * 519 * PUBLIC: int cl_refresh(SCR *, int); 520 */ 521int 522cl_refresh(SCR *sp, int repaint) 523{ 524 GS *gp; 525 CL_PRIVATE *clp; 526 WINDOW *win; 527 SCR *psp, *tsp; 528 size_t y, x; 529 530 gp = sp->gp; 531 clp = CLP(sp); 532 win = CLSP(sp) ? CLSP(sp) : stdscr; 533 534 /* 535 * If we received a killer signal, we're done, there's no point 536 * in refreshing the screen. 537 */ 538 if (clp->killersig) 539 return (0); 540 541 /* 542 * If repaint is set, the editor is telling us that we don't know 543 * what's on the screen, so we have to repaint from scratch. 544 * 545 * If repaint set or the screen layout changed, we need to redraw 546 * any lines separating vertically split screens. If the horizontal 547 * offsets are the same, then the split was vertical, and need to 548 * draw a dividing line. 549 */ 550 if (repaint || F_ISSET(clp, CL_LAYOUT)) { 551 getyx(stdscr, y, x); 552 for (psp = sp; psp != NULL; psp = TAILQ_NEXT(psp, q)) 553 for (tsp = TAILQ_NEXT(psp, q); tsp != NULL; 554 tsp = TAILQ_NEXT(tsp, q)) 555 if (psp->roff == tsp->roff) { 556 if (psp->coff + psp->cols + 1 == tsp->coff) 557 cl_rdiv(psp); 558 else 559 if (tsp->coff + tsp->cols + 1 == psp->coff) 560 cl_rdiv(tsp); 561 } 562 (void)wmove(stdscr, y, x); 563 F_CLR(clp, CL_LAYOUT); 564 } 565 566 /* 567 * In the curses library, doing wrefresh(curscr) is okay, but the 568 * screen flashes when we then apply the refresh() to bring it up 569 * to date. So, use clearok(). 570 */ 571 if (repaint) 572 clearok(curscr, 1); 573 /* 574 * Only do an actual refresh, when this is the focus window, 575 * i.e. the one holding the cursor. This assumes that refresh 576 * is called for that window after refreshing the others. 577 * This prevents the cursor being drawn in the other windows. 578 */ 579 return (wnoutrefresh(stdscr) == ERR || 580 wnoutrefresh(win) == ERR || 581 (sp == clp->focus && doupdate() == ERR)); 582} 583 584/* 585 * cl_rdiv -- 586 * Draw a dividing line between two vertically split screens. 587 */ 588static void 589cl_rdiv(SCR *sp) 590{ 591#ifdef __NetBSD__ 592 mvvline(sp->roff, sp->cols + sp->coff, '|', sp->rows); 593#else 594 mvvline(sp->roff, sp->cols + sp->coff, ACS_VLINE, sp->rows); 595#endif 596} 597 598/* 599 * cl_rename -- 600 * Rename the file. 601 * 602 * PUBLIC: int cl_rename(SCR *, char *, int); 603 */ 604int 605cl_rename(SCR *sp, char *name, int on) 606{ 607 GS *gp; 608 CL_PRIVATE *clp; 609 FILE *pfp; 610 char buf[256], *s, *e; 611 char * wid; 612 char cmd[64]; 613 614 gp = sp->gp; 615 clp = CLP(sp); 616 617 /* 618 * XXX 619 * We can only rename windows for xterm. 620 */ 621 if (on) { 622 clp->focus = sp; 623 if (!F_ISSET(clp, CL_RENAME_OK) || 624 strncmp(OG_STR(gp, GO_TERM), "xterm", 5)) 625 return (0); 626 627 if (clp->oname == NULL && (wid = getenv("WINDOWID"))) { 628 snprintf(cmd, sizeof(cmd), "xprop -id %s WM_NAME", wid); 629 if ((pfp = popen(cmd, "r")) == NULL) 630 goto rename; 631 if (fgets(buf, sizeof(buf), pfp) == NULL) { 632 pclose(pfp); 633 goto rename; 634 } 635 pclose(pfp); 636 if ((s = strchr(buf, '"')) != NULL && 637 (e = strrchr(buf, '"')) != NULL) 638 clp->oname = strndup(s + 1, e - s - 1); 639 } 640 641rename: cl_setname(gp, name); 642 643 F_SET(clp, CL_RENAME); 644 } else 645 if (F_ISSET(clp, CL_RENAME)) { 646 cl_setname(gp, clp->oname); 647 648 F_CLR(clp, CL_RENAME); 649 } 650 return (0); 651} 652 653/* 654 * cl_setname -- 655 * Set a X11 icon/window name. 656 * 657 * PUBLIC: void cl_setname(GS *, char *); 658 */ 659void 660cl_setname(GS *gp, char *name) 661{ 662/* X11 xterm escape sequence to rename the icon/window. */ 663#define XTERM_RENAME "\033]0;%s\007" 664 665 (void)printf(XTERM_RENAME, name == NULL ? OG_STR(gp, GO_TERM) : name); 666 (void)fflush(stdout); 667#undef XTERM_RENAME 668} 669 670/* 671 * cl_split -- 672 * Split a screen. 673 * 674 * PUBLIC: int cl_split(SCR *, SCR *); 675 */ 676int 677cl_split(SCR *origp, SCR *newp) 678{ 679 CL_PRIVATE *clp; 680 681 clp = CLP(origp); 682 F_SET(clp, CL_LAYOUT); 683 684 if (CLSP(origp)) 685 delwin(CLSP(origp)); 686 687 origp->cl_private = subwin(stdscr, origp->rows, origp->cols, 688 origp->roff, origp->coff); 689 newp->cl_private = subwin(stdscr, newp->rows, newp->cols, 690 newp->roff, newp->coff); 691 692 /* origp is the original screen, giving up space to newp. */ 693 return (0); 694} 695 696/* 697 * cl_suspend -- 698 * Suspend a screen. 699 * 700 * PUBLIC: int cl_suspend(SCR *, int *); 701 */ 702int 703cl_suspend(SCR *sp, int *allowedp) 704{ 705 struct termios t; 706 CL_PRIVATE *clp; 707 WINDOW *win; 708 GS *gp; 709 size_t y, x; 710 int changed; 711 712 gp = sp->gp; 713 clp = CLP(sp); 714 win = CLSP(sp) ? CLSP(sp) : stdscr; 715 *allowedp = 1; 716 717 /* 718 * The ex implementation of this function isn't needed by screens not 719 * supporting ex commands that require full terminal canonical mode 720 * (e.g. :suspend). 721 * 722 * The vi implementation of this function isn't needed by screens not 723 * supporting vi process suspension, i.e. any screen that isn't backed 724 * by a UNIX shell. 725 * 726 * Setting allowedp to 0 will cause the editor to reject the command. 727 */ 728 if (F_ISSET(sp, SC_EX)) { 729 /* Save the terminal settings, and restore the original ones. */ 730 if (F_ISSET(clp, CL_STDIN_TTY)) { 731 (void)tcgetattr(STDIN_FILENO, &t); 732 (void)tcsetattr(STDIN_FILENO, 733 TCSASOFT | TCSADRAIN, &clp->orig); 734 } 735 736 /* Stop the process group. */ 737 (void)kill(0, SIGTSTP); 738 739 /* Time passes ... */ 740 741 /* Restore terminal settings. */ 742 if (F_ISSET(clp, CL_STDIN_TTY)) 743 (void)tcsetattr(STDIN_FILENO, TCSASOFT | TCSADRAIN, &t); 744 return (0); 745 } 746 747 /* 748 * Move to the lower left-hand corner of the screen. 749 * 750 * XXX 751 * Not sure this is necessary in System V implementations, but it 752 * shouldn't hurt. 753 */ 754 getyx(win, y, x); 755 (void)wmove(win, LINES - 1, 0); 756 (void)wrefresh(win); 757 758 /* 759 * Temporarily end the screen. System V introduced a semantic where 760 * endwin() could be restarted. We use it because restarting curses 761 * from scratch often fails in System V. 4BSD curses didn't support 762 * restarting after endwin(), so we have to do what clean up we can 763 * without calling it. 764 */ 765 /* Save the terminal settings. */ 766 (void)tcgetattr(STDIN_FILENO, &t); 767 768 /* Restore the cursor keys to normal mode. */ 769 (void)keypad(stdscr, FALSE); 770 771 /* Restore the window name. */ 772 (void)cl_rename(sp, NULL, 0); 773 774 (void)endwin(); 775 776 /* 777 * XXX 778 * Restore the original terminal settings. This is bad -- the 779 * reset can cause character loss from the tty queue. However, 780 * we can't call endwin() in BSD curses implementations, and too 781 * many System V curses implementations don't get it right. 782 */ 783 (void)tcsetattr(STDIN_FILENO, TCSADRAIN | TCSASOFT, &clp->orig); 784 785 /* Stop the process group. */ 786 (void)kill(0, SIGTSTP); 787 788 /* Time passes ... */ 789 790 /* 791 * If we received a killer signal, we're done. Leave everything 792 * unchanged. In addition, the terminal has already been reset 793 * correctly, so leave it alone. 794 */ 795 if (clp->killersig) { 796 F_CLR(clp, CL_SCR_EX_INIT | CL_SCR_VI_INIT); 797 return (0); 798 } 799 800 /* Restore terminal settings. */ 801 wrefresh(win); /* Needed on SunOs/Solaris ? */ 802 if (F_ISSET(clp, CL_STDIN_TTY)) 803 (void)tcsetattr(STDIN_FILENO, TCSASOFT | TCSADRAIN, &t); 804 805 /* Set the window name. */ 806 (void)cl_rename(sp, sp->frp->name, 1); 807 808 /* Put the cursor keys into application mode. */ 809 (void)keypad(stdscr, TRUE); 810 811 /* Refresh and repaint the screen. */ 812 (void)wmove(win, y, x); 813 (void)cl_refresh(sp, 1); 814 815 /* If the screen changed size, set the SIGWINCH bit. */ 816 if (cl_ssize(sp, 1, NULL, NULL, &changed)) 817 return (1); 818 if (changed) 819 F_SET(CLP(sp), CL_SIGWINCH); 820 821 return (0); 822} 823 824/* 825 * cl_usage -- 826 * Print out the curses usage messages. 827 * 828 * PUBLIC: void cl_usage(void); 829 */ 830void 831cl_usage(void) 832{ 833#define USAGE "\ 834usage: ex [-eFRrSsv] [-c command] [-t tag] [-w size] [file ...]\n\ 835usage: vi [-eFlRrSv] [-c command] [-t tag] [-w size] [file ...]\n" 836 (void)fprintf(stderr, "%s", USAGE); 837#undef USAGE 838} 839 840#ifdef DEBUG 841/* 842 * gdbrefresh -- 843 * Stub routine so can flush out curses screen changes using gdb. 844 */ 845static int 846 __attribute__((unused)) 847gdbrefresh(void) 848{ 849 refresh(); 850 return (0); /* XXX Convince gdb to run it. */ 851} 852#endif 853