Annotation of src/usr.bin/less/screen.c, Revision 1.1.1.4
1.1 etheisen 1: /*
1.1.1.4 ! shadchin 2: * Copyright (C) 1984-2012 Mark Nudelman
1.1 etheisen 3: *
1.1.1.2 millert 4: * You may distribute under the terms of either the GNU General Public
5: * License or the Less License, as specified in the README file.
1.1 etheisen 6: *
1.1.1.4 ! shadchin 7: * For more information, see the README file.
1.1 etheisen 8: */
9:
10:
11: /*
12: * Routines which deal with the characteristics of the terminal.
13: * Uses termcap to be as terminal-independent as possible.
14: */
15:
16: #include "less.h"
17: #include "cmd.h"
18:
1.1.1.2 millert 19: #if MSDOS_COMPILER
20: #include "pckeys.h"
21: #if MSDOS_COMPILER==MSOFTC
22: #include <graph.h>
23: #else
24: #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
25: #include <conio.h>
26: #if MSDOS_COMPILER==DJGPPC
27: #include <pc.h>
28: extern int fd0;
29: #endif
30: #else
31: #if MSDOS_COMPILER==WIN32C
32: #include <windows.h>
33: #endif
34: #endif
35: #endif
36: #include <time.h>
37:
38: #else
39:
1.1.1.3 shadchin 40: #if HAVE_SYS_IOCTL_H
1.1 etheisen 41: #include <sys/ioctl.h>
42: #endif
1.1.1.3 shadchin 43:
44: #if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS
45: #include <termios.h>
1.1 etheisen 46: #else
47: #if HAVE_TERMIO_H
48: #include <termio.h>
49: #else
1.1.1.2 millert 50: #if HAVE_SGSTAT_H
51: #include <sgstat.h>
52: #else
1.1 etheisen 53: #include <sgtty.h>
1.1.1.2 millert 54: #endif
1.1 etheisen 55: #endif
56: #endif
1.1.1.2 millert 57:
1.1 etheisen 58: #if HAVE_TERMCAP_H
59: #include <termcap.h>
60: #endif
1.1.1.2 millert 61: #ifdef _OSK
62: #include <signal.h>
1.1 etheisen 63: #endif
1.1.1.2 millert 64: #if OS2
65: #include <sys/signal.h>
66: #include "pckeys.h"
1.1 etheisen 67: #endif
68: #if HAVE_SYS_STREAM_H
69: #include <sys/stream.h>
70: #endif
71: #if HAVE_SYS_PTEM_H
72: #include <sys/ptem.h>
73: #endif
74:
1.1.1.2 millert 75: #endif /* MSDOS_COMPILER */
76:
77: /*
78: * Check for broken termios package that forces you to manually
79: * set the line discipline.
80: */
81: #ifdef __ultrix__
82: #define MUST_SET_LINE_DISCIPLINE 1
83: #else
84: #define MUST_SET_LINE_DISCIPLINE 0
85: #endif
86:
1.1 etheisen 87: #if OS2
88: #define DEFAULT_TERM "ansi"
1.1.1.2 millert 89: static char *windowid;
1.1 etheisen 90: #else
91: #define DEFAULT_TERM "unknown"
92: #endif
93:
1.1.1.2 millert 94: #if MSDOS_COMPILER==MSOFTC
95: static int videopages;
96: static long msec_loops;
97: static int flash_created = 0;
98: #define SETCOLORS(fg,bg) { _settextcolor(fg); _setbkcolor(bg); }
99: #endif
100:
101: #if MSDOS_COMPILER==BORLANDC
102: static unsigned short *whitescreen;
103: static int flash_created = 0;
104: #endif
105: #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
106: #define _settextposition(y,x) gotoxy(x,y)
107: #define _clearscreen(m) clrscr()
108: #define _outtext(s) cputs(s)
109: #define SETCOLORS(fg,bg) { textcolor(fg); textbackground(bg); }
110: extern int sc_height;
111: #endif
112:
113: #if MSDOS_COMPILER==WIN32C
114: struct keyRecord
115: {
116: int ascii;
117: int scan;
118: } currentKey;
119:
120: static int keyCount = 0;
121: static WORD curr_attr;
122: static int pending_scancode = 0;
123: static WORD *whitescreen;
124:
125: static HANDLE con_out_save = INVALID_HANDLE_VALUE; /* previous console */
126: static HANDLE con_out_ours = INVALID_HANDLE_VALUE; /* our own */
127: HANDLE con_out = INVALID_HANDLE_VALUE; /* current console */
128:
129: extern int quitting;
130: static void win32_init_term();
131: static void win32_deinit_term();
132:
133: #define FG_COLORS (FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_INTENSITY)
134: #define BG_COLORS (BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE | BACKGROUND_INTENSITY)
135: #define MAKEATTR(fg,bg) ((WORD)((fg)|((bg)<<4)))
136: #define SETCOLORS(fg,bg) { curr_attr = MAKEATTR(fg,bg); \
137: if (SetConsoleTextAttribute(con_out, curr_attr) == 0) \
138: error("SETCOLORS failed"); }
139: #endif
140:
141: #if MSDOS_COMPILER
142: public int nm_fg_color; /* Color of normal text */
143: public int nm_bg_color;
144: public int bo_fg_color; /* Color of bold text */
145: public int bo_bg_color;
146: public int ul_fg_color; /* Color of underlined text */
147: public int ul_bg_color;
148: public int so_fg_color; /* Color of standout text */
149: public int so_bg_color;
150: public int bl_fg_color; /* Color of blinking text */
151: public int bl_bg_color;
152: static int sy_fg_color; /* Color of system text (before less) */
153: static int sy_bg_color;
154:
155: #else
156:
1.1 etheisen 157: /*
158: * Strings passed to tputs() to do various terminal functions.
159: */
160: static char
161: *sc_pad, /* Pad string */
162: *sc_home, /* Cursor home */
163: *sc_addline, /* Add line, scroll down following lines */
164: *sc_lower_left, /* Cursor to last line, first column */
1.1.1.3 shadchin 165: *sc_return, /* Cursor to beginning of current line */
1.1 etheisen 166: *sc_move, /* General cursor positioning */
167: *sc_clear, /* Clear screen */
168: *sc_eol_clear, /* Clear to end of line */
169: *sc_eos_clear, /* Clear to end of screen */
170: *sc_s_in, /* Enter standout (highlighted) mode */
171: *sc_s_out, /* Exit standout mode */
172: *sc_u_in, /* Enter underline mode */
173: *sc_u_out, /* Exit underline mode */
174: *sc_b_in, /* Enter bold mode */
175: *sc_b_out, /* Exit bold mode */
176: *sc_bl_in, /* Enter blink mode */
177: *sc_bl_out, /* Exit blink mode */
178: *sc_visual_bell, /* Visual bell (flash screen) sequence */
179: *sc_backspace, /* Backspace cursor */
180: *sc_s_keypad, /* Start keypad mode */
181: *sc_e_keypad, /* End keypad mode */
182: *sc_init, /* Startup terminal initialization */
183: *sc_deinit; /* Exit terminal de-initialization */
1.1.1.2 millert 184: #endif
1.1 etheisen 185:
186: static int init_done = 0;
187:
188: public int auto_wrap; /* Terminal does \r\n when write past margin */
189: public int ignaw; /* Terminal ignores \n immediately after wrap */
1.1.1.3 shadchin 190: public int erase_char; /* The user's erase char */
191: public int erase2_char; /* The user's other erase char */
192: public int kill_char; /* The user's line-kill char */
1.1 etheisen 193: public int werase_char; /* The user's word-erase char */
194: public int sc_width, sc_height; /* Height & width of screen */
195: public int bo_s_width, bo_e_width; /* Printing width of boldface seq */
196: public int ul_s_width, ul_e_width; /* Printing width of underline seq */
197: public int so_s_width, so_e_width; /* Printing width of standout seq */
198: public int bl_s_width, bl_e_width; /* Printing width of blink seq */
199: public int above_mem, below_mem; /* Memory retained above/below screen */
200: public int can_goto_line; /* Can move cursor to any line */
1.1.1.2 millert 201: public int clear_bg; /* Clear fills with background color */
202: public int missing_cap = 0; /* Some capability is missing */
1.1 etheisen 203:
1.1.1.2 millert 204: static int attrmode = AT_NORMAL;
1.1.1.3 shadchin 205: extern int binattr;
1.1.1.2 millert 206:
207: #if !MSDOS_COMPILER
1.1 etheisen 208: static char *cheaper();
1.1.1.2 millert 209: static void tmodes();
210: #endif
1.1 etheisen 211:
212: /*
213: * These two variables are sometimes defined in,
214: * and needed by, the termcap library.
215: */
216: #if MUST_DEFINE_OSPEED
217: extern short ospeed; /* Terminal output baud rate */
218: extern char PC; /* Pad character */
219: #endif
1.1.1.2 millert 220: #ifdef _OSK
221: short ospeed;
222: char PC_, *UP, *BC;
223: #endif
1.1 etheisen 224:
225: extern int quiet; /* If VERY_QUIET, use visual bell for bell */
1.1.1.2 millert 226: extern int no_back_scroll;
1.1 etheisen 227: extern int swindow;
228: extern int no_init;
1.1.1.2 millert 229: extern int no_keypad;
1.1.1.4 ! shadchin 230: extern volatile sig_atomic_t sigs;
1.1.1.2 millert 231: extern int wscroll;
232: extern int screen_trashed;
233: extern int tty;
1.1.1.3 shadchin 234: extern int top_scroll;
235: extern int oldbot;
1.1 etheisen 236: #if HILITE_SEARCH
237: extern int hilite_search;
238: #endif
239:
240: extern char *tgetstr();
241: extern char *tgoto();
242:
243:
244: /*
245: * Change terminal to "raw mode", or restore to "normal" mode.
246: * "Raw mode" means
247: * 1. An outstanding read will complete on receipt of a single keystroke.
248: * 2. Input is not echoed.
249: * 3. On output, \n is mapped to \r\n.
250: * 4. \t is NOT expanded into spaces.
251: * 5. Signal-causing characters such as ctrl-C (interrupt),
252: * etc. are NOT disabled.
253: * It doesn't matter whether an input \n is mapped to \r, or vice versa.
254: */
255: public void
256: raw_mode(on)
257: int on;
258: {
259: static int curr_on = 0;
260:
261: if (on == curr_on)
262: return;
1.1.1.3 shadchin 263: erase2_char = '\b'; /* in case OS doesn't know about erase2 */
1.1 etheisen 264: #if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS
265: {
266: struct termios s;
267: static struct termios save_term;
1.1.1.2 millert 268: static int saved_term = 0;
1.1 etheisen 269:
270: if (on)
271: {
272: /*
273: * Get terminal modes.
274: */
1.1.1.2 millert 275: tcgetattr(tty, &s);
1.1 etheisen 276:
277: /*
278: * Save modes and set certain variables dependent on modes.
279: */
1.1.1.2 millert 280: if (!saved_term)
281: {
282: save_term = s;
283: saved_term = 1;
284: }
1.1 etheisen 285: #if HAVE_OSPEED
286: switch (cfgetospeed(&s))
287: {
288: #ifdef B0
289: case B0: ospeed = 0; break;
290: #endif
291: #ifdef B50
292: case B50: ospeed = 1; break;
293: #endif
294: #ifdef B75
295: case B75: ospeed = 2; break;
296: #endif
297: #ifdef B110
298: case B110: ospeed = 3; break;
299: #endif
300: #ifdef B134
301: case B134: ospeed = 4; break;
302: #endif
303: #ifdef B150
304: case B150: ospeed = 5; break;
305: #endif
306: #ifdef B200
307: case B200: ospeed = 6; break;
308: #endif
309: #ifdef B300
310: case B300: ospeed = 7; break;
311: #endif
312: #ifdef B600
313: case B600: ospeed = 8; break;
314: #endif
315: #ifdef B1200
316: case B1200: ospeed = 9; break;
317: #endif
318: #ifdef B1800
319: case B1800: ospeed = 10; break;
320: #endif
321: #ifdef B2400
322: case B2400: ospeed = 11; break;
323: #endif
324: #ifdef B4800
325: case B4800: ospeed = 12; break;
326: #endif
327: #ifdef B9600
328: case B9600: ospeed = 13; break;
329: #endif
330: #ifdef EXTA
331: case EXTA: ospeed = 14; break;
332: #endif
333: #ifdef EXTB
334: case EXTB: ospeed = 15; break;
335: #endif
336: #ifdef B57600
337: case B57600: ospeed = 16; break;
338: #endif
339: #ifdef B115200
340: case B115200: ospeed = 17; break;
341: #endif
342: default: ;
343: }
344: #endif
345: erase_char = s.c_cc[VERASE];
1.1.1.3 shadchin 346: #ifdef VERASE2
347: erase2_char = s.c_cc[VERASE2];
348: #endif
1.1 etheisen 349: kill_char = s.c_cc[VKILL];
350: #ifdef VWERASE
351: werase_char = s.c_cc[VWERASE];
352: #else
1.1.1.2 millert 353: werase_char = CONTROL('W');
1.1 etheisen 354: #endif
355:
356: /*
357: * Set the modes to the way we want them.
358: */
359: s.c_lflag &= ~(0
360: #ifdef ICANON
361: | ICANON
362: #endif
363: #ifdef ECHO
364: | ECHO
365: #endif
366: #ifdef ECHOE
367: | ECHOE
368: #endif
369: #ifdef ECHOK
370: | ECHOK
371: #endif
372: #if ECHONL
373: | ECHONL
374: #endif
375: );
376:
377: s.c_oflag |= (0
1.1.1.2 millert 378: #ifdef OXTABS
379: | OXTABS
1.1 etheisen 380: #else
381: #ifdef TAB3
382: | TAB3
383: #else
1.1.1.2 millert 384: #ifdef XTABS
385: | XTABS
1.1 etheisen 386: #endif
387: #endif
388: #endif
389: #ifdef OPOST
390: | OPOST
391: #endif
392: #ifdef ONLCR
393: | ONLCR
394: #endif
395: );
396:
397: s.c_oflag &= ~(0
398: #ifdef ONOEOT
399: | ONOEOT
400: #endif
401: #ifdef OCRNL
402: | OCRNL
403: #endif
404: #ifdef ONOCR
405: | ONOCR
406: #endif
407: #ifdef ONLRET
408: | ONLRET
409: #endif
410: );
411: s.c_cc[VMIN] = 1;
412: s.c_cc[VTIME] = 0;
1.1.1.2 millert 413: #ifdef VLNEXT
414: s.c_cc[VLNEXT] = 0;
415: #endif
416: #ifdef VDSUSP
417: s.c_cc[VDSUSP] = 0;
418: #endif
419: #if MUST_SET_LINE_DISCIPLINE
420: /*
421: * System's termios is broken; need to explicitly
422: * request TERMIODISC line discipline.
423: */
424: s.c_line = TERMIODISC;
425: #endif
1.1 etheisen 426: } else
427: {
428: /*
429: * Restore saved modes.
430: */
431: s = save_term;
432: }
1.1.1.4 ! shadchin 433: tcsetattr(tty, TCSASOFT | TCSADRAIN, &s);
1.1.1.2 millert 434: #if HAVE_FSYNC
435: fsync(tty);
436: #endif
437: #if MUST_SET_LINE_DISCIPLINE
438: if (!on)
439: {
440: /*
441: * Broken termios *ignores* any line discipline
442: * except TERMIODISC. A different old line discipline
443: * is therefore not restored, yet. Restore the old
444: * line discipline by hand.
445: */
446: ioctl(tty, TIOCSETD, &save_term.c_line);
447: }
448: #endif
1.1 etheisen 449: }
450: #else
451: #ifdef TCGETA
452: {
453: struct termio s;
454: static struct termio save_term;
1.1.1.2 millert 455: static int saved_term = 0;
1.1 etheisen 456:
457: if (on)
458: {
459: /*
460: * Get terminal modes.
461: */
1.1.1.2 millert 462: ioctl(tty, TCGETA, &s);
1.1 etheisen 463:
464: /*
465: * Save modes and set certain variables dependent on modes.
466: */
1.1.1.2 millert 467: if (!saved_term)
468: {
469: save_term = s;
470: saved_term = 1;
471: }
1.1 etheisen 472: #if HAVE_OSPEED
473: ospeed = s.c_cflag & CBAUD;
474: #endif
475: erase_char = s.c_cc[VERASE];
476: kill_char = s.c_cc[VKILL];
477: #ifdef VWERASE
478: werase_char = s.c_cc[VWERASE];
479: #else
1.1.1.2 millert 480: werase_char = CONTROL('W');
1.1 etheisen 481: #endif
482:
483: /*
484: * Set the modes to the way we want them.
485: */
486: s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL);
487: s.c_oflag |= (OPOST|ONLCR|TAB3);
488: s.c_oflag &= ~(OCRNL|ONOCR|ONLRET);
489: s.c_cc[VMIN] = 1;
490: s.c_cc[VTIME] = 0;
491: } else
492: {
493: /*
494: * Restore saved modes.
495: */
496: s = save_term;
497: }
1.1.1.2 millert 498: ioctl(tty, TCSETAW, &s);
1.1 etheisen 499: }
500: #else
1.1.1.2 millert 501: #ifdef TIOCGETP
1.1 etheisen 502: {
503: struct sgttyb s;
504: static struct sgttyb save_term;
1.1.1.2 millert 505: static int saved_term = 0;
1.1 etheisen 506:
507: if (on)
508: {
509: /*
510: * Get terminal modes.
511: */
1.1.1.2 millert 512: ioctl(tty, TIOCGETP, &s);
1.1 etheisen 513:
514: /*
515: * Save modes and set certain variables dependent on modes.
516: */
1.1.1.2 millert 517: if (!saved_term)
518: {
519: save_term = s;
520: saved_term = 1;
521: }
1.1 etheisen 522: #if HAVE_OSPEED
523: ospeed = s.sg_ospeed;
524: #endif
525: erase_char = s.sg_erase;
526: kill_char = s.sg_kill;
1.1.1.2 millert 527: werase_char = CONTROL('W');
1.1 etheisen 528:
529: /*
530: * Set the modes to the way we want them.
531: */
532: s.sg_flags |= CBREAK;
533: s.sg_flags &= ~(ECHO|XTABS);
534: } else
535: {
536: /*
537: * Restore saved modes.
538: */
539: s = save_term;
540: }
1.1.1.2 millert 541: ioctl(tty, TIOCSETN, &s);
542: }
543: #else
544: #ifdef _OSK
545: {
546: struct sgbuf s;
547: static struct sgbuf save_term;
548: static int saved_term = 0;
549:
550: if (on)
551: {
552: /*
553: * Get terminal modes.
554: */
555: _gs_opt(tty, &s);
556:
557: /*
558: * Save modes and set certain variables dependent on modes.
559: */
560: if (!saved_term)
561: {
562: save_term = s;
563: saved_term = 1;
564: }
565: erase_char = s.sg_bspch;
566: kill_char = s.sg_dlnch;
567: werase_char = CONTROL('W');
568:
569: /*
570: * Set the modes to the way we want them.
571: */
572: s.sg_echo = 0;
573: s.sg_eofch = 0;
574: s.sg_pause = 0;
575: s.sg_psch = 0;
576: } else
577: {
578: /*
579: * Restore saved modes.
580: */
581: s = save_term;
582: }
583: _ss_opt(tty, &s);
1.1 etheisen 584: }
1.1.1.2 millert 585: #else
586: /* MS-DOS, Windows, or OS2 */
587: #if OS2
588: /* OS2 */
589: LSIGNAL(SIGINT, SIG_IGN);
590: #endif
591: erase_char = '\b';
592: #if MSDOS_COMPILER==DJGPPC
593: kill_char = CONTROL('U');
594: /*
595: * So that when we shell out or run another program, its
596: * stdin is in cooked mode. We do not switch stdin to binary
597: * mode if fd0 is zero, since that means we were called before
598: * tty was reopened in open_getchr, in which case we would be
599: * changing the original stdin device outside less.
600: */
601: if (fd0 != 0)
602: setmode(0, on ? O_BINARY : O_TEXT);
603: #else
604: kill_char = ESC;
605: #endif
606: werase_char = CONTROL('W');
607: #endif
1.1 etheisen 608: #endif
609: #endif
610: #endif
611: curr_on = on;
612: }
613:
1.1.1.2 millert 614: #if !MSDOS_COMPILER
615: /*
616: * Some glue to prevent calling termcap functions if tgetent() failed.
617: */
618: static int hardcopy;
1.1 etheisen 619:
1.1.1.2 millert 620: static char *
621: ltget_env(capname)
622: char *capname;
623: {
624: char name[16];
1.1.1.3 shadchin 625: char *s;
1.1 etheisen 626:
1.1.1.3 shadchin 627: s = lgetenv("LESS_TERMCAP_DEBUG");
628: if (s != NULL && *s != '\0')
629: {
630: struct env { struct env *next; char *name; char *value; };
631: static struct env *envs = NULL;
632: struct env *p;
1.1.1.4 ! shadchin 633: size_t len;
1.1.1.3 shadchin 634: for (p = envs; p != NULL; p = p->next)
635: if (strcmp(p->name, capname) == 0)
636: return p->value;
637: p = (struct env *) ecalloc(1, sizeof(struct env));
638: p->name = save(capname);
1.1.1.4 ! shadchin 639: len = strlen(capname) + 3;
! 640: p->value = (char *) ecalloc(len, sizeof(char));
! 641: snprintf(p->value, len, "<%s>", capname);
1.1.1.3 shadchin 642: p->next = envs;
643: envs = p;
644: return p->value;
645: }
1.1.1.4 ! shadchin 646: strlcpy(name, "LESS_TERMCAP_", sizeof(name));
! 647: strlcat(name, capname, sizeof(name));
1.1.1.2 millert 648: return (lgetenv(name));
1.1 etheisen 649: }
650:
1.1.1.2 millert 651: static int
652: ltgetflag(capname)
653: char *capname;
1.1 etheisen 654: {
1.1.1.2 millert 655: char *s;
1.1 etheisen 656:
1.1.1.2 millert 657: if ((s = ltget_env(capname)) != NULL)
658: return (*s != '\0' && *s != '0');
659: if (hardcopy)
660: return (0);
661: return (tgetflag(capname));
1.1 etheisen 662: }
663:
1.1.1.2 millert 664: static int
665: ltgetnum(capname)
666: char *capname;
1.1 etheisen 667: {
1.1.1.2 millert 668: char *s;
1.1 etheisen 669:
1.1.1.2 millert 670: if ((s = ltget_env(capname)) != NULL)
671: return (atoi(s));
672: if (hardcopy)
673: return (-1);
674: return (tgetnum(capname));
675: }
1.1 etheisen 676:
1.1.1.2 millert 677: static char *
678: ltgetstr(capname, pp)
679: char *capname;
680: char **pp;
681: {
682: char *s;
1.1 etheisen 683:
1.1.1.2 millert 684: if ((s = ltget_env(capname)) != NULL)
685: return (s);
686: if (hardcopy)
687: return (NULL);
688: return (tgetstr(capname, pp));
1.1 etheisen 689: }
1.1.1.2 millert 690: #endif /* MSDOS_COMPILER */
1.1 etheisen 691:
692: /*
1.1.1.2 millert 693: * Get size of the output screen.
1.1 etheisen 694: */
695: public void
1.1.1.2 millert 696: scrsize()
1.1 etheisen 697: {
1.1.1.2 millert 698: register char *s;
699: int sys_height;
700: int sys_width;
701: #if !MSDOS_COMPILER
702: int n;
703: #endif
1.1 etheisen 704:
1.1.1.2 millert 705: #define DEF_SC_WIDTH 80
706: #if MSDOS_COMPILER
707: #define DEF_SC_HEIGHT 25
708: #else
709: #define DEF_SC_HEIGHT 24
710: #endif
1.1 etheisen 711:
712:
1.1.1.2 millert 713: sys_width = sys_height = 0;
1.1 etheisen 714:
1.1.1.2 millert 715: #if MSDOS_COMPILER==MSOFTC
1.1 etheisen 716: {
1.1.1.2 millert 717: struct videoconfig w;
718: _getvideoconfig(&w);
719: sys_height = w.numtextrows;
720: sys_width = w.numtextcols;
1.1 etheisen 721: }
1.1.1.2 millert 722: #else
723: #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1.1 etheisen 724: {
1.1.1.2 millert 725: struct text_info w;
726: gettextinfo(&w);
727: sys_height = w.screenheight;
728: sys_width = w.screenwidth;
1.1 etheisen 729: }
1.1.1.2 millert 730: #else
731: #if MSDOS_COMPILER==WIN32C
1.1 etheisen 732: {
1.1.1.2 millert 733: CONSOLE_SCREEN_BUFFER_INFO scr;
734: GetConsoleScreenBufferInfo(con_out, &scr);
735: sys_height = scr.srWindow.Bottom - scr.srWindow.Top + 1;
736: sys_width = scr.srWindow.Right - scr.srWindow.Left + 1;
1.1 etheisen 737: }
1.1.1.2 millert 738: #else
739: #if OS2
1.1 etheisen 740: {
1.1.1.2 millert 741: int s[2];
742: _scrsize(s);
743: sys_width = s[0];
744: sys_height = s[1];
745: /*
746: * When using terminal emulators for XFree86/OS2, the
747: * _scrsize function does not work well.
748: * Call the scrsize.exe program to get the window size.
749: */
750: windowid = getenv("WINDOWID");
751: if (windowid != NULL)
752: {
753: FILE *fd = popen("scrsize", "rt");
754: if (fd != NULL)
755: {
756: int w, h;
757: fscanf(fd, "%i %i", &w, &h);
758: if (w > 0 && h > 0)
759: {
760: sys_width = w;
761: sys_height = h;
762: }
763: pclose(fd);
764: }
765: }
1.1 etheisen 766: }
1.1.1.2 millert 767: #else
768: #ifdef TIOCGWINSZ
1.1 etheisen 769: {
1.1.1.2 millert 770: struct winsize w;
771: if (ioctl(2, TIOCGWINSZ, &w) == 0)
772: {
773: if (w.ws_row > 0)
774: sys_height = w.ws_row;
775: if (w.ws_col > 0)
776: sys_width = w.ws_col;
777: }
1.1 etheisen 778: }
1.1.1.2 millert 779: #else
780: #ifdef WIOCGETD
1.1 etheisen 781: {
1.1.1.2 millert 782: struct uwdata w;
783: if (ioctl(2, WIOCGETD, &w) == 0)
784: {
785: if (w.uw_height > 0)
786: sys_height = w.uw_height / w.uw_vs;
787: if (w.uw_width > 0)
788: sys_width = w.uw_width / w.uw_hs;
789: }
1.1 etheisen 790: }
1.1.1.2 millert 791: #endif
792: #endif
793: #endif
794: #endif
795: #endif
796: #endif
1.1 etheisen 797:
1.1.1.2 millert 798: if (sys_height > 0)
799: sc_height = sys_height;
800: else if ((s = lgetenv("LINES")) != NULL)
801: sc_height = atoi(s);
802: #if !MSDOS_COMPILER
803: else if ((n = ltgetnum("li")) > 0)
804: sc_height = n;
805: #endif
1.1.1.4 ! shadchin 806: if (sc_height <= 0)
1.1.1.2 millert 807: sc_height = DEF_SC_HEIGHT;
1.1 etheisen 808:
1.1.1.2 millert 809: if (sys_width > 0)
810: sc_width = sys_width;
811: else if ((s = lgetenv("COLUMNS")) != NULL)
812: sc_width = atoi(s);
813: #if !MSDOS_COMPILER
814: else if ((n = ltgetnum("co")) > 0)
815: sc_width = n;
816: #endif
1.1.1.4 ! shadchin 817: if (sc_width <= 0)
1.1.1.2 millert 818: sc_width = DEF_SC_WIDTH;
1.1 etheisen 819: }
820:
1.1.1.2 millert 821: #if MSDOS_COMPILER==MSOFTC
822: /*
823: * Figure out how many empty loops it takes to delay a millisecond.
824: */
1.1 etheisen 825: static void
1.1.1.2 millert 826: get_clock()
1.1 etheisen 827: {
1.1.1.2 millert 828: clock_t start;
829:
830: /*
831: * Get synchronized at the start of a tick.
832: */
833: start = clock();
834: while (clock() == start)
835: ;
836: /*
837: * Now count loops till the next tick.
838: */
839: start = clock();
840: msec_loops = 0;
841: while (clock() == start)
842: msec_loops++;
843: /*
844: * Convert from (loops per clock) to (loops per millisecond).
845: */
846: msec_loops *= CLOCKS_PER_SEC;
847: msec_loops /= 1000;
1.1 etheisen 848: }
849:
850: /*
1.1.1.2 millert 851: * Delay for a specified number of milliseconds.
1.1 etheisen 852: */
1.1.1.2 millert 853: static void
854: dummy_func()
1.1 etheisen 855: {
1.1.1.2 millert 856: static long delay_dummy = 0;
857: delay_dummy++;
858: }
1.1 etheisen 859:
1.1.1.2 millert 860: static void
861: delay(msec)
862: int msec;
863: {
864: long i;
865:
866: while (msec-- > 0)
1.1 etheisen 867: {
1.1.1.2 millert 868: for (i = 0; i < msec_loops; i++)
1.1 etheisen 869: {
1.1.1.2 millert 870: /*
871: * Make it look like we're doing something here,
872: * so the optimizer doesn't remove the whole loop.
873: */
874: dummy_func();
1.1 etheisen 875: }
876: }
1.1.1.2 millert 877: }
1.1 etheisen 878: #endif
879:
1.1.1.2 millert 880: /*
881: * Return the characters actually input by a "special" key.
882: */
883: public char *
884: special_key_str(key)
885: int key;
886: {
887: static char tbuf[40];
888: char *s;
889: #if MSDOS_COMPILER || OS2
890: static char k_right[] = { '\340', PCK_RIGHT, 0 };
891: static char k_left[] = { '\340', PCK_LEFT, 0 };
892: static char k_ctl_right[] = { '\340', PCK_CTL_RIGHT, 0 };
893: static char k_ctl_left[] = { '\340', PCK_CTL_LEFT, 0 };
894: static char k_insert[] = { '\340', PCK_INSERT, 0 };
895: static char k_delete[] = { '\340', PCK_DELETE, 0 };
896: static char k_ctl_delete[] = { '\340', PCK_CTL_DELETE, 0 };
897: static char k_ctl_backspace[] = { '\177', 0 };
898: static char k_home[] = { '\340', PCK_HOME, 0 };
899: static char k_end[] = { '\340', PCK_END, 0 };
900: static char k_up[] = { '\340', PCK_UP, 0 };
901: static char k_down[] = { '\340', PCK_DOWN, 0 };
902: static char k_backtab[] = { '\340', PCK_SHIFT_TAB, 0 };
903: static char k_pagedown[] = { '\340', PCK_PAGEDOWN, 0 };
904: static char k_pageup[] = { '\340', PCK_PAGEUP, 0 };
905: static char k_f1[] = { '\340', PCK_F1, 0 };
906: #endif
907: #if !MSDOS_COMPILER
908: char *sp = tbuf;
909: #endif
1.1 etheisen 910:
1.1.1.2 millert 911: switch (key)
912: {
913: #if OS2
1.1 etheisen 914: /*
1.1.1.2 millert 915: * If windowid is not NULL, assume less is executed in
916: * the XFree86 environment.
1.1 etheisen 917: */
1.1.1.2 millert 918: case SK_RIGHT_ARROW:
919: s = windowid ? ltgetstr("kr", &sp) : k_right;
920: break;
921: case SK_LEFT_ARROW:
922: s = windowid ? ltgetstr("kl", &sp) : k_left;
923: break;
924: case SK_UP_ARROW:
925: s = windowid ? ltgetstr("ku", &sp) : k_up;
926: break;
927: case SK_DOWN_ARROW:
928: s = windowid ? ltgetstr("kd", &sp) : k_down;
929: break;
930: case SK_PAGE_UP:
931: s = windowid ? ltgetstr("kP", &sp) : k_pageup;
932: break;
933: case SK_PAGE_DOWN:
934: s = windowid ? ltgetstr("kN", &sp) : k_pagedown;
935: break;
936: case SK_HOME:
937: s = windowid ? ltgetstr("kh", &sp) : k_home;
938: break;
939: case SK_END:
940: s = windowid ? ltgetstr("@7", &sp) : k_end;
941: break;
942: case SK_DELETE:
943: if (windowid)
944: {
945: s = ltgetstr("kD", &sp);
946: if (s == NULL)
947: {
948: tbuf[0] = '\177';
949: tbuf[1] = '\0';
950: s = tbuf;
951: }
952: } else
953: s = k_delete;
954: break;
955: #endif
956: #if MSDOS_COMPILER
957: case SK_RIGHT_ARROW:
958: s = k_right;
959: break;
960: case SK_LEFT_ARROW:
961: s = k_left;
962: break;
963: case SK_UP_ARROW:
964: s = k_up;
965: break;
966: case SK_DOWN_ARROW:
967: s = k_down;
968: break;
969: case SK_PAGE_UP:
970: s = k_pageup;
971: break;
972: case SK_PAGE_DOWN:
973: s = k_pagedown;
974: break;
975: case SK_HOME:
976: s = k_home;
977: break;
978: case SK_END:
979: s = k_end;
980: break;
981: case SK_DELETE:
982: s = k_delete;
983: break;
984: #endif
985: #if MSDOS_COMPILER || OS2
986: case SK_INSERT:
987: s = k_insert;
988: break;
989: case SK_CTL_LEFT_ARROW:
990: s = k_ctl_left;
991: break;
992: case SK_CTL_RIGHT_ARROW:
993: s = k_ctl_right;
994: break;
995: case SK_CTL_BACKSPACE:
996: s = k_ctl_backspace;
997: break;
998: case SK_CTL_DELETE:
999: s = k_ctl_delete;
1000: break;
1001: case SK_F1:
1002: s = k_f1;
1003: break;
1004: case SK_BACKTAB:
1005: s = k_backtab;
1006: break;
1007: #else
1008: case SK_RIGHT_ARROW:
1009: s = ltgetstr("kr", &sp);
1010: break;
1011: case SK_LEFT_ARROW:
1012: s = ltgetstr("kl", &sp);
1013: break;
1014: case SK_UP_ARROW:
1015: s = ltgetstr("ku", &sp);
1016: break;
1017: case SK_DOWN_ARROW:
1018: s = ltgetstr("kd", &sp);
1019: break;
1020: case SK_PAGE_UP:
1021: s = ltgetstr("kP", &sp);
1022: break;
1023: case SK_PAGE_DOWN:
1024: s = ltgetstr("kN", &sp);
1025: break;
1026: case SK_HOME:
1027: s = ltgetstr("kh", &sp);
1028: break;
1029: case SK_END:
1030: s = ltgetstr("@7", &sp);
1031: break;
1032: case SK_DELETE:
1033: s = ltgetstr("kD", &sp);
1034: if (s == NULL)
1035: {
1036: tbuf[0] = '\177';
1037: tbuf[1] = '\0';
1038: s = tbuf;
1039: }
1040: break;
1041: #endif
1042: case SK_CONTROL_K:
1043: tbuf[0] = CONTROL('K');
1044: tbuf[1] = '\0';
1045: s = tbuf;
1046: break;
1047: default:
1048: return (NULL);
1049: }
1050: return (s);
1051: }
1052:
1053: /*
1054: * Get terminal capabilities via termcap.
1055: */
1056: public void
1057: get_term()
1058: {
1059: #if MSDOS_COMPILER
1060: auto_wrap = 1;
1061: ignaw = 0;
1062: can_goto_line = 1;
1063: clear_bg = 1;
1064: /*
1065: * Set up default colors.
1066: * The xx_s_width and xx_e_width vars are already initialized to 0.
1067: */
1068: #if MSDOS_COMPILER==MSOFTC
1069: sy_bg_color = _getbkcolor();
1070: sy_fg_color = _gettextcolor();
1071: get_clock();
1072: #else
1073: #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1074: {
1075: struct text_info w;
1076: gettextinfo(&w);
1077: sy_bg_color = (w.attribute >> 4) & 0x0F;
1078: sy_fg_color = (w.attribute >> 0) & 0x0F;
1079: }
1080: #else
1081: #if MSDOS_COMPILER==WIN32C
1082: {
1083: DWORD nread;
1084: CONSOLE_SCREEN_BUFFER_INFO scr;
1085:
1086: con_out_save = con_out = GetStdHandle(STD_OUTPUT_HANDLE);
1087: /*
1088: * Always open stdin in binary. Note this *must* be done
1089: * before any file operations have been done on fd0.
1090: */
1091: SET_BINARY(0);
1092: GetConsoleScreenBufferInfo(con_out, &scr);
1093: ReadConsoleOutputAttribute(con_out, &curr_attr,
1094: 1, scr.dwCursorPosition, &nread);
1095: sy_bg_color = (curr_attr & BG_COLORS) >> 4; /* normalize */
1096: sy_fg_color = curr_attr & FG_COLORS;
1097: }
1098: #endif
1099: #endif
1100: #endif
1101: nm_fg_color = sy_fg_color;
1102: nm_bg_color = sy_bg_color;
1103: bo_fg_color = 11;
1104: bo_bg_color = 0;
1105: ul_fg_color = 9;
1106: ul_bg_color = 0;
1107: so_fg_color = 15;
1108: so_bg_color = 9;
1109: bl_fg_color = 15;
1110: bl_bg_color = 0;
1111:
1112: /*
1113: * Get size of the screen.
1114: */
1115: scrsize();
1116: pos_init();
1.1 etheisen 1117:
1.1.1.2 millert 1118:
1119: #else /* !MSDOS_COMPILER */
1120:
1121: char *sp;
1122: register char *t1, *t2;
1123: char *term;
1124: char termbuf[TERMBUF_SIZE];
1125:
1126: static char sbuf[TERMSBUF_SIZE];
1127:
1128: #if OS2
1129: /*
1130: * Make sure the termcap database is available.
1131: */
1132: sp = lgetenv("TERMCAP");
1133: if (sp == NULL || *sp == '\0')
1.1 etheisen 1134: {
1.1.1.2 millert 1135: char *termcap;
1136: if ((sp = homefile("termcap.dat")) != NULL)
1137: {
1.1.1.4 ! shadchin 1138: size_t len = strlen(sp) + 9;
! 1139: termcap = (char *) ecalloc(len, sizeof(char));
! 1140: snprintf(termcap, len, "TERMCAP=%s", sp);
1.1.1.2 millert 1141: free(sp);
1142: putenv(termcap);
1143: }
1.1 etheisen 1144: }
1.1.1.2 millert 1145: #endif
1146: /*
1147: * Find out what kind of terminal this is.
1148: */
1149: if ((term = lgetenv("TERM")) == NULL)
1150: term = DEFAULT_TERM;
1151: hardcopy = 0;
1.1.1.3 shadchin 1152: if (tgetent(termbuf, term) != TGETENT_OK)
1.1.1.2 millert 1153: hardcopy = 1;
1154: if (ltgetflag("hc"))
1155: hardcopy = 1;
1156:
1157: /*
1158: * Get size of the screen.
1159: */
1160: scrsize();
1161: pos_init();
1.1 etheisen 1162:
1.1.1.2 millert 1163: auto_wrap = ltgetflag("am");
1164: ignaw = ltgetflag("xn");
1165: above_mem = ltgetflag("da");
1166: below_mem = ltgetflag("db");
1167: clear_bg = ltgetflag("ut");
1.1 etheisen 1168:
1169: /*
1170: * Assumes termcap variable "sg" is the printing width of:
1171: * the standout sequence, the end standout sequence,
1172: * the underline sequence, the end underline sequence,
1173: * the boldface sequence, and the end boldface sequence.
1174: */
1.1.1.2 millert 1175: if ((so_s_width = ltgetnum("sg")) < 0)
1.1 etheisen 1176: so_s_width = 0;
1177: so_e_width = so_s_width;
1178:
1179: bo_s_width = bo_e_width = so_s_width;
1180: ul_s_width = ul_e_width = so_s_width;
1181: bl_s_width = bl_e_width = so_s_width;
1182:
1183: #if HILITE_SEARCH
1184: if (so_s_width > 0 || so_e_width > 0)
1185: /*
1186: * Disable highlighting by default on magic cookie terminals.
1187: * Turning on highlighting might change the displayed width
1188: * of a line, causing the display to get messed up.
1189: * The user can turn it back on with -g,
1190: * but she won't like the results.
1191: */
1192: hilite_search = 0;
1193: #endif
1194:
1195: /*
1196: * Get various string-valued capabilities.
1197: */
1198: sp = sbuf;
1199:
1200: #if HAVE_OSPEED
1.1.1.2 millert 1201: sc_pad = ltgetstr("pc", &sp);
1.1 etheisen 1202: if (sc_pad != NULL)
1203: PC = *sc_pad;
1204: #endif
1205:
1.1.1.2 millert 1206: sc_s_keypad = ltgetstr("ks", &sp);
1.1 etheisen 1207: if (sc_s_keypad == NULL)
1208: sc_s_keypad = "";
1.1.1.2 millert 1209: sc_e_keypad = ltgetstr("ke", &sp);
1.1 etheisen 1210: if (sc_e_keypad == NULL)
1211: sc_e_keypad = "";
1212:
1.1.1.2 millert 1213: sc_init = ltgetstr("ti", &sp);
1.1 etheisen 1214: if (sc_init == NULL)
1215: sc_init = "";
1216:
1.1.1.2 millert 1217: sc_deinit= ltgetstr("te", &sp);
1.1 etheisen 1218: if (sc_deinit == NULL)
1219: sc_deinit = "";
1220:
1.1.1.2 millert 1221: sc_eol_clear = ltgetstr("ce", &sp);
1222: if (sc_eol_clear == NULL || *sc_eol_clear == '\0')
1.1 etheisen 1223: {
1.1.1.2 millert 1224: missing_cap = 1;
1.1 etheisen 1225: sc_eol_clear = "";
1226: }
1227:
1.1.1.2 millert 1228: sc_eos_clear = ltgetstr("cd", &sp);
1229: if (below_mem && (sc_eos_clear == NULL || *sc_eos_clear == '\0'))
1.1 etheisen 1230: {
1.1.1.2 millert 1231: missing_cap = 1;
1.1.1.3 shadchin 1232: sc_eos_clear = "";
1.1 etheisen 1233: }
1234:
1.1.1.2 millert 1235: sc_clear = ltgetstr("cl", &sp);
1236: if (sc_clear == NULL || *sc_clear == '\0')
1.1 etheisen 1237: {
1.1.1.2 millert 1238: missing_cap = 1;
1.1 etheisen 1239: sc_clear = "\n\n";
1240: }
1241:
1.1.1.2 millert 1242: sc_move = ltgetstr("cm", &sp);
1243: if (sc_move == NULL || *sc_move == '\0')
1.1 etheisen 1244: {
1245: /*
1246: * This is not an error here, because we don't
1247: * always need sc_move.
1248: * We need it only if we don't have home or lower-left.
1249: */
1250: sc_move = "";
1251: can_goto_line = 0;
1252: } else
1253: can_goto_line = 1;
1254:
1.1.1.2 millert 1255: tmodes("so", "se", &sc_s_in, &sc_s_out, "", "", &sp);
1256: tmodes("us", "ue", &sc_u_in, &sc_u_out, sc_s_in, sc_s_out, &sp);
1257: tmodes("md", "me", &sc_b_in, &sc_b_out, sc_s_in, sc_s_out, &sp);
1258: tmodes("mb", "me", &sc_bl_in, &sc_bl_out, sc_s_in, sc_s_out, &sp);
1.1 etheisen 1259:
1.1.1.2 millert 1260: sc_visual_bell = ltgetstr("vb", &sp);
1261: if (sc_visual_bell == NULL)
1.1 etheisen 1262: sc_visual_bell = "";
1263:
1.1.1.2 millert 1264: if (ltgetflag("bs"))
1.1 etheisen 1265: sc_backspace = "\b";
1266: else
1267: {
1.1.1.2 millert 1268: sc_backspace = ltgetstr("bc", &sp);
1.1 etheisen 1269: if (sc_backspace == NULL || *sc_backspace == '\0')
1270: sc_backspace = "\b";
1271: }
1272:
1273: /*
1274: * Choose between using "ho" and "cm" ("home" and "cursor move")
1275: * to move the cursor to the upper left corner of the screen.
1276: */
1.1.1.2 millert 1277: t1 = ltgetstr("ho", &sp);
1278: if (t1 == NULL)
1.1 etheisen 1279: t1 = "";
1280: if (*sc_move == '\0')
1281: t2 = "";
1282: else
1283: {
1.1.1.4 ! shadchin 1284: strlcpy(sp, tgoto(sc_move, 0, 0), sbuf + sizeof(sbuf) - sp);
1.1 etheisen 1285: t2 = sp;
1286: sp += strlen(sp) + 1;
1287: }
1.1.1.2 millert 1288: sc_home = cheaper(t1, t2, "|\b^");
1.1 etheisen 1289:
1290: /*
1291: * Choose between using "ll" and "cm" ("lower left" and "cursor move")
1292: * to move the cursor to the lower left corner of the screen.
1293: */
1.1.1.2 millert 1294: t1 = ltgetstr("ll", &sp);
1295: if (t1 == NULL)
1.1 etheisen 1296: t1 = "";
1297: if (*sc_move == '\0')
1298: t2 = "";
1299: else
1300: {
1.1.1.4 ! shadchin 1301: strlcpy(sp, tgoto(sc_move, 0, sc_height-1),
! 1302: sbuf + sizeof(sbuf) - sp);
1.1 etheisen 1303: t2 = sp;
1304: sp += strlen(sp) + 1;
1305: }
1.1.1.2 millert 1306: sc_lower_left = cheaper(t1, t2, "\r");
1.1 etheisen 1307:
1308: /*
1.1.1.3 shadchin 1309: * Get carriage return string.
1310: */
1311: sc_return = ltgetstr("cr", &sp);
1312: if (sc_return == NULL)
1313: sc_return = "\r";
1314:
1315: /*
1.1 etheisen 1316: * Choose between using "al" or "sr" ("add line" or "scroll reverse")
1317: * to add a line at the top of the screen.
1318: */
1.1.1.2 millert 1319: t1 = ltgetstr("al", &sp);
1320: if (t1 == NULL)
1.1 etheisen 1321: t1 = "";
1.1.1.2 millert 1322: t2 = ltgetstr("sr", &sp);
1323: if (t2 == NULL)
1.1 etheisen 1324: t2 = "";
1325: #if OS2
1326: if (*t1 == '\0' && *t2 == '\0')
1327: sc_addline = "";
1328: else
1329: #endif
1330: if (above_mem)
1331: sc_addline = t1;
1332: else
1.1.1.2 millert 1333: sc_addline = cheaper(t1, t2, "");
1.1 etheisen 1334: if (*sc_addline == '\0')
1335: {
1336: /*
1337: * Force repaint on any backward movement.
1338: */
1.1.1.2 millert 1339: no_back_scroll = 1;
1.1 etheisen 1340: }
1.1.1.2 millert 1341: #endif /* MSDOS_COMPILER */
1.1 etheisen 1342: }
1343:
1.1.1.2 millert 1344: #if !MSDOS_COMPILER
1.1 etheisen 1345: /*
1346: * Return the cost of displaying a termcap string.
1347: * We use the trick of calling tputs, but as a char printing function
1348: * we give it inc_costcount, which just increments "costcount".
1349: * This tells us how many chars would be printed by using this string.
1350: * {{ Couldn't we just use strlen? }}
1351: */
1352: static int costcount;
1353:
1354: /*ARGSUSED*/
1355: static int
1356: inc_costcount(c)
1357: int c;
1358: {
1359: costcount++;
1360: return (c);
1361: }
1362:
1363: static int
1364: cost(t)
1365: char *t;
1366: {
1367: costcount = 0;
1368: tputs(t, sc_height, inc_costcount);
1369: return (costcount);
1370: }
1371:
1372: /*
1373: * Return the "best" of the two given termcap strings.
1374: * The best, if both exist, is the one with the lower
1375: * cost (see cost() function).
1376: */
1377: static char *
1.1.1.2 millert 1378: cheaper(t1, t2, def)
1.1 etheisen 1379: char *t1, *t2;
1380: char *def;
1381: {
1382: if (*t1 == '\0' && *t2 == '\0')
1383: {
1.1.1.2 millert 1384: missing_cap = 1;
1.1 etheisen 1385: return (def);
1386: }
1387: if (*t1 == '\0')
1388: return (t2);
1389: if (*t2 == '\0')
1390: return (t1);
1391: if (cost(t1) < cost(t2))
1392: return (t1);
1393: return (t2);
1394: }
1395:
1.1.1.2 millert 1396: static void
1397: tmodes(incap, outcap, instr, outstr, def_instr, def_outstr, spp)
1398: char *incap;
1399: char *outcap;
1400: char **instr;
1401: char **outstr;
1402: char *def_instr;
1403: char *def_outstr;
1404: char **spp;
1405: {
1406: *instr = ltgetstr(incap, spp);
1407: if (*instr == NULL)
1408: {
1409: /* Use defaults. */
1410: *instr = def_instr;
1411: *outstr = def_outstr;
1412: return;
1413: }
1414:
1415: *outstr = ltgetstr(outcap, spp);
1416: if (*outstr == NULL)
1417: /* No specific out capability; use "me". */
1418: *outstr = ltgetstr("me", spp);
1419: if (*outstr == NULL)
1420: /* Don't even have "me"; use a null string. */
1421: *outstr = "";
1422: }
1423:
1424: #endif /* MSDOS_COMPILER */
1425:
1.1 etheisen 1426:
1427: /*
1428: * Below are the functions which perform all the
1429: * terminal-specific screen manipulation.
1430: */
1431:
1432:
1.1.1.2 millert 1433: #if MSDOS_COMPILER
1434:
1435: #if MSDOS_COMPILER==WIN32C
1436: static void
1437: _settextposition(int row, int col)
1438: {
1439: COORD cpos;
1440: CONSOLE_SCREEN_BUFFER_INFO csbi;
1441:
1442: GetConsoleScreenBufferInfo(con_out, &csbi);
1443: cpos.X = csbi.srWindow.Left + (col - 1);
1444: cpos.Y = csbi.srWindow.Top + (row - 1);
1445: SetConsoleCursorPosition(con_out, cpos);
1446: }
1447: #endif
1448:
1449: /*
1450: * Initialize the screen to the correct color at startup.
1451: */
1452: static void
1453: initcolor()
1454: {
1455: SETCOLORS(nm_fg_color, nm_bg_color);
1456: #if 0
1457: /*
1458: * This clears the screen at startup. This is different from
1459: * the behavior of other versions of less. Disable it for now.
1460: */
1461: char *blanks;
1462: int row;
1463: int col;
1464:
1465: /*
1466: * Create a complete, blank screen using "normal" colors.
1467: */
1468: SETCOLORS(nm_fg_color, nm_bg_color);
1469: blanks = (char *) ecalloc(width+1, sizeof(char));
1470: for (col = 0; col < sc_width; col++)
1471: blanks[col] = ' ';
1472: blanks[sc_width] = '\0';
1473: for (row = 0; row < sc_height; row++)
1474: _outtext(blanks);
1475: free(blanks);
1476: #endif
1477: }
1478: #endif
1479:
1480: #if MSDOS_COMPILER==WIN32C
1481:
1482: /*
1483: * Termcap-like init with a private win32 console.
1484: */
1485: static void
1486: win32_init_term()
1487: {
1488: CONSOLE_SCREEN_BUFFER_INFO scr;
1489: COORD size;
1490:
1491: if (con_out_save == INVALID_HANDLE_VALUE)
1492: return;
1493:
1494: GetConsoleScreenBufferInfo(con_out_save, &scr);
1495:
1496: if (con_out_ours == INVALID_HANDLE_VALUE)
1497: {
1498: /*
1499: * Create our own screen buffer, so that we
1500: * may restore the original when done.
1501: */
1502: con_out_ours = CreateConsoleScreenBuffer(
1503: GENERIC_WRITE | GENERIC_READ,
1504: FILE_SHARE_WRITE | FILE_SHARE_READ,
1505: (LPSECURITY_ATTRIBUTES) NULL,
1506: CONSOLE_TEXTMODE_BUFFER,
1507: (LPVOID) NULL);
1508: }
1509:
1510: size.X = scr.srWindow.Right - scr.srWindow.Left + 1;
1511: size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1;
1512: SetConsoleScreenBufferSize(con_out_ours, size);
1513: SetConsoleActiveScreenBuffer(con_out_ours);
1514: con_out = con_out_ours;
1515: }
1516:
1517: /*
1518: * Restore the startup console.
1519: */
1520: static void
1521: win32_deinit_term()
1522: {
1523: if (con_out_save == INVALID_HANDLE_VALUE)
1524: return;
1525: if (quitting)
1526: (void) CloseHandle(con_out_ours);
1527: SetConsoleActiveScreenBuffer(con_out_save);
1528: con_out = con_out_save;
1529: }
1530:
1531: #endif
1532:
1.1 etheisen 1533: /*
1534: * Initialize terminal
1535: */
1536: public void
1537: init()
1538: {
1.1.1.2 millert 1539: #if !MSDOS_COMPILER
1540: if (!no_init)
1541: tputs(sc_init, sc_height, putchr);
1542: if (!no_keypad)
1543: tputs(sc_s_keypad, sc_height, putchr);
1.1.1.3 shadchin 1544: if (top_scroll)
1545: {
1546: int i;
1547:
1548: /*
1549: * This is nice to terminals with no alternate screen,
1550: * but with saved scrolled-off-the-top lines. This way,
1551: * no previous line is lost, but we start with a whole
1552: * screen to ourself.
1553: */
1554: for (i = 1; i < sc_height; i++)
1555: putchr('\n');
1556: } else
1557: line_left();
1.1.1.2 millert 1558: #else
1559: #if MSDOS_COMPILER==WIN32C
1560: if (!no_init)
1561: win32_init_term();
1562: #endif
1563: initcolor();
1564: flush();
1565: #endif
1.1 etheisen 1566: init_done = 1;
1567: }
1568:
1569: /*
1570: * Deinitialize terminal
1571: */
1572: public void
1573: deinit()
1574: {
1575: if (!init_done)
1576: return;
1.1.1.2 millert 1577: #if !MSDOS_COMPILER
1578: if (!no_keypad)
1579: tputs(sc_e_keypad, sc_height, putchr);
1580: if (!no_init)
1581: tputs(sc_deinit, sc_height, putchr);
1582: #else
1583: /* Restore system colors. */
1584: SETCOLORS(sy_fg_color, sy_bg_color);
1585: #if MSDOS_COMPILER==WIN32C
1586: if (!no_init)
1587: win32_deinit_term();
1588: #else
1589: /* Need clreol to make SETCOLORS take effect. */
1590: clreol();
1591: #endif
1592: #endif
1.1 etheisen 1593: init_done = 0;
1594: }
1595:
1596: /*
1597: * Home cursor (move to upper left corner of screen).
1598: */
1599: public void
1600: home()
1601: {
1.1.1.2 millert 1602: #if !MSDOS_COMPILER
1.1 etheisen 1603: tputs(sc_home, 1, putchr);
1.1.1.2 millert 1604: #else
1605: flush();
1606: _settextposition(1,1);
1607: #endif
1.1 etheisen 1608: }
1609:
1610: /*
1611: * Add a blank line (called with cursor at home).
1612: * Should scroll the display down.
1613: */
1614: public void
1615: add_line()
1616: {
1.1.1.2 millert 1617: #if !MSDOS_COMPILER
1.1 etheisen 1618: tputs(sc_addline, sc_height, putchr);
1.1.1.2 millert 1619: #else
1620: flush();
1621: #if MSDOS_COMPILER==MSOFTC
1622: _scrolltextwindow(_GSCROLLDOWN);
1623: _settextposition(1,1);
1624: #else
1625: #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1626: movetext(1,1, sc_width,sc_height-1, 1,2);
1627: gotoxy(1,1);
1628: clreol();
1629: #else
1630: #if MSDOS_COMPILER==WIN32C
1631: {
1632: CHAR_INFO fillchar;
1633: SMALL_RECT rcSrc, rcClip;
1634: COORD new_org;
1635: CONSOLE_SCREEN_BUFFER_INFO csbi;
1636:
1637: GetConsoleScreenBufferInfo(con_out,&csbi);
1638:
1639: /* The clip rectangle is the entire visible screen. */
1640: rcClip.Left = csbi.srWindow.Left;
1641: rcClip.Top = csbi.srWindow.Top;
1642: rcClip.Right = csbi.srWindow.Right;
1643: rcClip.Bottom = csbi.srWindow.Bottom;
1644:
1645: /* The source rectangle is the visible screen minus the last line. */
1646: rcSrc = rcClip;
1647: rcSrc.Bottom--;
1648:
1649: /* Move the top left corner of the source window down one row. */
1650: new_org.X = rcSrc.Left;
1651: new_org.Y = rcSrc.Top + 1;
1652:
1653: /* Fill the right character and attributes. */
1654: fillchar.Char.AsciiChar = ' ';
1655: curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
1656: fillchar.Attributes = curr_attr;
1657: ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar);
1658: _settextposition(1,1);
1659: }
1660: #endif
1661: #endif
1662: #endif
1663: #endif
1664: }
1665:
1666: #if 0
1667: /*
1668: * Remove the n topmost lines and scroll everything below it in the
1669: * window upward. This is needed to stop leaking the topmost line
1670: * into the scrollback buffer when we go down-one-line (in WIN32).
1671: */
1672: public void
1673: remove_top(n)
1674: int n;
1675: {
1676: #if MSDOS_COMPILER==WIN32C
1677: SMALL_RECT rcSrc, rcClip;
1678: CHAR_INFO fillchar;
1679: COORD new_org;
1680: CONSOLE_SCREEN_BUFFER_INFO csbi; /* to get buffer info */
1681:
1682: if (n >= sc_height - 1)
1683: {
1684: clear();
1685: home();
1686: return;
1687: }
1688:
1689: flush();
1690:
1691: GetConsoleScreenBufferInfo(con_out, &csbi);
1692:
1693: /* Get the extent of all-visible-rows-but-the-last. */
1694: rcSrc.Left = csbi.srWindow.Left;
1695: rcSrc.Top = csbi.srWindow.Top + n;
1696: rcSrc.Right = csbi.srWindow.Right;
1697: rcSrc.Bottom = csbi.srWindow.Bottom;
1698:
1699: /* Get the clip rectangle. */
1700: rcClip.Left = rcSrc.Left;
1701: rcClip.Top = csbi.srWindow.Top;
1702: rcClip.Right = rcSrc.Right;
1703: rcClip.Bottom = rcSrc.Bottom ;
1704:
1705: /* Move the source window up n rows. */
1706: new_org.X = rcSrc.Left;
1707: new_org.Y = rcSrc.Top - n;
1708:
1709: /* Fill the right character and attributes. */
1710: fillchar.Char.AsciiChar = ' ';
1711: curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
1712: fillchar.Attributes = curr_attr;
1713:
1714: ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar);
1715:
1716: /* Position cursor on first blank line. */
1717: goto_line(sc_height - n - 1);
1718: #endif
1719: }
1720: #endif
1721:
1722: #if MSDOS_COMPILER==WIN32C
1723: /*
1724: * Clear the screen.
1725: */
1726: static void
1727: win32_clear()
1728: {
1729: /*
1730: * This will clear only the currently visible rows of the NT
1731: * console buffer, which means none of the precious scrollback
1732: * rows are touched making for faster scrolling. Note that, if
1733: * the window has fewer columns than the console buffer (i.e.
1734: * there is a horizontal scrollbar as well), the entire width
1735: * of the visible rows will be cleared.
1736: */
1737: COORD topleft;
1738: DWORD nchars;
1739: DWORD winsz;
1740: CONSOLE_SCREEN_BUFFER_INFO csbi;
1741:
1742: /* get the number of cells in the current buffer */
1743: GetConsoleScreenBufferInfo(con_out, &csbi);
1744: winsz = csbi.dwSize.X * (csbi.srWindow.Bottom - csbi.srWindow.Top + 1);
1745: topleft.X = 0;
1746: topleft.Y = csbi.srWindow.Top;
1747:
1748: curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
1749: FillConsoleOutputCharacter(con_out, ' ', winsz, topleft, &nchars);
1750: FillConsoleOutputAttribute(con_out, curr_attr, winsz, topleft, &nchars);
1751: }
1752:
1753: /*
1754: * Remove the n topmost lines and scroll everything below it in the
1755: * window upward.
1756: */
1757: public void
1758: win32_scroll_up(n)
1759: int n;
1760: {
1761: SMALL_RECT rcSrc, rcClip;
1762: CHAR_INFO fillchar;
1763: COORD topleft;
1764: COORD new_org;
1765: DWORD nchars;
1766: DWORD size;
1767: CONSOLE_SCREEN_BUFFER_INFO csbi;
1768:
1769: if (n <= 0)
1770: return;
1771:
1772: if (n >= sc_height - 1)
1773: {
1774: win32_clear();
1775: _settextposition(1,1);
1776: return;
1777: }
1778:
1779: /* Get the extent of what will remain visible after scrolling. */
1780: GetConsoleScreenBufferInfo(con_out, &csbi);
1781: rcSrc.Left = csbi.srWindow.Left;
1782: rcSrc.Top = csbi.srWindow.Top + n;
1783: rcSrc.Right = csbi.srWindow.Right;
1784: rcSrc.Bottom = csbi.srWindow.Bottom;
1785:
1786: /* Get the clip rectangle. */
1787: rcClip.Left = rcSrc.Left;
1788: rcClip.Top = csbi.srWindow.Top;
1789: rcClip.Right = rcSrc.Right;
1790: rcClip.Bottom = rcSrc.Bottom ;
1791:
1792: /* Move the source text to the top of the screen. */
1793: new_org.X = rcSrc.Left;
1.1.1.3 shadchin 1794: new_org.Y = rcClip.Top;
1.1.1.2 millert 1795:
1796: /* Fill the right character and attributes. */
1797: fillchar.Char.AsciiChar = ' ';
1798: fillchar.Attributes = MAKEATTR(nm_fg_color, nm_bg_color);
1799:
1800: /* Scroll the window. */
1801: SetConsoleTextAttribute(con_out, fillchar.Attributes);
1802: ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar);
1803:
1804: /* Clear remaining lines at bottom. */
1805: topleft.X = csbi.dwCursorPosition.X;
1806: topleft.Y = rcSrc.Bottom - n;
1807: size = (n * csbi.dwSize.X) + (rcSrc.Right - topleft.X);
1808: FillConsoleOutputCharacter(con_out, ' ', size, topleft,
1809: &nchars);
1810: FillConsoleOutputAttribute(con_out, fillchar.Attributes, size, topleft,
1811: &nchars);
1812: SetConsoleTextAttribute(con_out, curr_attr);
1813:
1814: /* Move cursor n lines up from where it was. */
1815: csbi.dwCursorPosition.Y -= n;
1816: SetConsoleCursorPosition(con_out, csbi.dwCursorPosition);
1.1 etheisen 1817: }
1.1.1.2 millert 1818: #endif
1.1 etheisen 1819:
1820: /*
1821: * Move cursor to lower left corner of screen.
1822: */
1823: public void
1824: lower_left()
1825: {
1.1.1.2 millert 1826: #if !MSDOS_COMPILER
1.1 etheisen 1827: tputs(sc_lower_left, 1, putchr);
1.1.1.2 millert 1828: #else
1829: flush();
1830: _settextposition(sc_height, 1);
1831: #endif
1832: }
1833:
1834: /*
1.1.1.3 shadchin 1835: * Move cursor to left position of current line.
1836: */
1837: public void
1838: line_left()
1839: {
1840: #if !MSDOS_COMPILER
1841: tputs(sc_return, 1, putchr);
1842: #else
1843: int row;
1844: flush();
1845: #if MSDOS_COMPILER==WIN32C
1846: {
1847: CONSOLE_SCREEN_BUFFER_INFO scr;
1848: GetConsoleScreenBufferInfo(con_out, &scr);
1849: row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1;
1850: }
1851: #else
1852: #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1853: row = wherey();
1854: #else
1855: {
1856: struct rccoord tpos = _gettextposition();
1857: row = tpos.row;
1858: }
1859: #endif
1860: #endif
1861: _settextposition(row, 1);
1862: #endif
1863: }
1864:
1865: /*
1.1.1.2 millert 1866: * Check if the console size has changed and reset internals
1867: * (in lieu of SIGWINCH for WIN32).
1868: */
1869: public void
1870: check_winch()
1871: {
1872: #if MSDOS_COMPILER==WIN32C
1873: CONSOLE_SCREEN_BUFFER_INFO scr;
1874: COORD size;
1875:
1876: if (con_out == INVALID_HANDLE_VALUE)
1877: return;
1878:
1879: flush();
1880: GetConsoleScreenBufferInfo(con_out, &scr);
1881: size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1;
1882: size.X = scr.srWindow.Right - scr.srWindow.Left + 1;
1883: if (size.Y != sc_height || size.X != sc_width)
1884: {
1885: sc_height = size.Y;
1886: sc_width = size.X;
1887: if (!no_init && con_out_ours == con_out)
1888: SetConsoleScreenBufferSize(con_out, size);
1889: pos_init();
1890: wscroll = (sc_height + 1) / 2;
1891: screen_trashed = 1;
1892: }
1893: #endif
1.1 etheisen 1894: }
1895:
1896: /*
1897: * Goto a specific line on the screen.
1898: */
1899: public void
1900: goto_line(slinenum)
1901: int slinenum;
1902: {
1.1.1.2 millert 1903: #if !MSDOS_COMPILER
1904: tputs(tgoto(sc_move, 0, slinenum), 1, putchr);
1905: #else
1906: flush();
1907: _settextposition(slinenum+1, 1);
1908: #endif
1.1 etheisen 1909: }
1910:
1.1.1.2 millert 1911: #if MSDOS_COMPILER==MSOFTC || MSDOS_COMPILER==BORLANDC
1.1 etheisen 1912: /*
1.1.1.2 millert 1913: * Create an alternate screen which is all white.
1914: * This screen is used to create a "flash" effect, by displaying it
1915: * briefly and then switching back to the normal screen.
1916: * {{ Yuck! There must be a better way to get a visual bell. }}
1.1 etheisen 1917: */
1.1.1.2 millert 1918: static void
1919: create_flash()
1.1 etheisen 1920: {
1.1.1.2 millert 1921: #if MSDOS_COMPILER==MSOFTC
1922: struct videoconfig w;
1923: char *blanks;
1924: int row, col;
1925:
1926: _getvideoconfig(&w);
1927: videopages = w.numvideopages;
1928: if (videopages < 2)
1929: {
1.1.1.3 shadchin 1930: at_enter(AT_STANDOUT);
1931: at_exit();
1.1.1.2 millert 1932: } else
1933: {
1934: _setactivepage(1);
1.1.1.3 shadchin 1935: at_enter(AT_STANDOUT);
1.1.1.2 millert 1936: blanks = (char *) ecalloc(w.numtextcols, sizeof(char));
1937: for (col = 0; col < w.numtextcols; col++)
1938: blanks[col] = ' ';
1939: for (row = w.numtextrows; row > 0; row--)
1940: _outmem(blanks, w.numtextcols);
1941: _setactivepage(0);
1942: _setvisualpage(0);
1943: free(blanks);
1.1.1.3 shadchin 1944: at_exit();
1.1.1.2 millert 1945: }
1946: #else
1947: #if MSDOS_COMPILER==BORLANDC
1948: register int n;
1949:
1950: whitescreen = (unsigned short *)
1951: malloc(sc_width * sc_height * sizeof(short));
1952: if (whitescreen == NULL)
1953: return;
1954: for (n = 0; n < sc_width * sc_height; n++)
1955: whitescreen[n] = 0x7020;
1956: #else
1957: #if MSDOS_COMPILER==WIN32C
1958: register int n;
1959:
1960: whitescreen = (WORD *)
1961: malloc(sc_height * sc_width * sizeof(WORD));
1962: if (whitescreen == NULL)
1963: return;
1964: /* Invert the standard colors. */
1965: for (n = 0; n < sc_width * sc_height; n++)
1966: whitescreen[n] = (WORD)((nm_fg_color << 4) | nm_bg_color);
1967: #endif
1968: #endif
1969: #endif
1970: flash_created = 1;
1.1 etheisen 1971: }
1.1.1.2 millert 1972: #endif /* MSDOS_COMPILER */
1.1 etheisen 1973:
1974: /*
1975: * Output the "visual bell", if there is one.
1976: */
1977: public void
1978: vbell()
1979: {
1.1.1.2 millert 1980: #if !MSDOS_COMPILER
1.1 etheisen 1981: if (*sc_visual_bell == '\0')
1982: return;
1983: tputs(sc_visual_bell, sc_height, putchr);
1.1.1.2 millert 1984: #else
1985: #if MSDOS_COMPILER==DJGPPC
1986: ScreenVisualBell();
1987: #else
1988: #if MSDOS_COMPILER==MSOFTC
1989: /*
1990: * Create a flash screen on the second video page.
1991: * Switch to that page, then switch back.
1992: */
1993: if (!flash_created)
1994: create_flash();
1995: if (videopages < 2)
1996: return;
1997: _setvisualpage(1);
1998: delay(100);
1999: _setvisualpage(0);
2000: #else
2001: #if MSDOS_COMPILER==BORLANDC
2002: unsigned short *currscreen;
2003:
2004: /*
2005: * Get a copy of the current screen.
2006: * Display the flash screen.
2007: * Then restore the old screen.
2008: */
2009: if (!flash_created)
2010: create_flash();
2011: if (whitescreen == NULL)
2012: return;
2013: currscreen = (unsigned short *)
2014: malloc(sc_width * sc_height * sizeof(short));
2015: if (currscreen == NULL) return;
2016: gettext(1, 1, sc_width, sc_height, currscreen);
2017: puttext(1, 1, sc_width, sc_height, whitescreen);
2018: delay(100);
2019: puttext(1, 1, sc_width, sc_height, currscreen);
2020: free(currscreen);
2021: #else
2022: #if MSDOS_COMPILER==WIN32C
2023: /* paint screen with an inverse color */
2024: clear();
2025:
2026: /* leave it displayed for 100 msec. */
2027: Sleep(100);
2028:
2029: /* restore with a redraw */
2030: repaint();
2031: #endif
2032: #endif
2033: #endif
2034: #endif
2035: #endif
2036: }
2037:
2038: /*
2039: * Make a noise.
2040: */
2041: static void
2042: beep()
2043: {
2044: #if !MSDOS_COMPILER
2045: putchr(CONTROL('G'));
2046: #else
2047: #if MSDOS_COMPILER==WIN32C
2048: MessageBeep(0);
2049: #else
1.1.1.4 ! shadchin 2050: write(STDOUT_FILENO, "\7", 1);
1.1.1.2 millert 2051: #endif
2052: #endif
2053: }
2054:
2055: /*
2056: * Ring the terminal bell.
2057: */
2058: public void
2059: bell()
2060: {
2061: if (quiet == VERY_QUIET)
2062: vbell();
2063: else
2064: beep();
1.1 etheisen 2065: }
2066:
2067: /*
2068: * Clear the screen.
2069: */
2070: public void
2071: clear()
2072: {
1.1.1.2 millert 2073: #if !MSDOS_COMPILER
1.1 etheisen 2074: tputs(sc_clear, sc_height, putchr);
1.1.1.2 millert 2075: #else
2076: flush();
2077: #if MSDOS_COMPILER==WIN32C
2078: win32_clear();
2079: #else
2080: _clearscreen(_GCLEARSCREEN);
2081: #endif
2082: #endif
1.1 etheisen 2083: }
2084:
2085: /*
2086: * Clear from the cursor to the end of the cursor's line.
2087: * {{ This must not move the cursor. }}
2088: */
2089: public void
2090: clear_eol()
2091: {
1.1.1.2 millert 2092: #if !MSDOS_COMPILER
1.1 etheisen 2093: tputs(sc_eol_clear, 1, putchr);
1.1.1.2 millert 2094: #else
2095: #if MSDOS_COMPILER==MSOFTC
2096: short top, left;
2097: short bot, right;
2098: struct rccoord tpos;
2099:
2100: flush();
2101: /*
2102: * Save current state.
2103: */
2104: tpos = _gettextposition();
2105: _gettextwindow(&top, &left, &bot, &right);
2106: /*
2107: * Set a temporary window to the current line,
2108: * from the cursor's position to the right edge of the screen.
2109: * Then clear that window.
2110: */
2111: _settextwindow(tpos.row, tpos.col, tpos.row, sc_width);
2112: _clearscreen(_GWINDOW);
2113: /*
2114: * Restore state.
2115: */
2116: _settextwindow(top, left, bot, right);
2117: _settextposition(tpos.row, tpos.col);
2118: #else
2119: #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
2120: flush();
2121: clreol();
2122: #else
2123: #if MSDOS_COMPILER==WIN32C
2124: DWORD nchars;
2125: COORD cpos;
2126: CONSOLE_SCREEN_BUFFER_INFO scr;
2127:
2128: flush();
2129: memset(&scr, 0, sizeof(scr));
2130: GetConsoleScreenBufferInfo(con_out, &scr);
2131: cpos.X = scr.dwCursorPosition.X;
2132: cpos.Y = scr.dwCursorPosition.Y;
2133: curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
2134: FillConsoleOutputAttribute(con_out, curr_attr,
2135: scr.dwSize.X - cpos.X, cpos, &nchars);
2136: FillConsoleOutputCharacter(con_out, ' ',
2137: scr.dwSize.X - cpos.X, cpos, &nchars);
2138: #endif
2139: #endif
2140: #endif
2141: #endif
2142: }
2143:
2144: /*
2145: * Clear the current line.
2146: * Clear the screen if there's off-screen memory below the display.
2147: */
2148: static void
2149: clear_eol_bot()
2150: {
2151: #if MSDOS_COMPILER
2152: clear_eol();
2153: #else
2154: if (below_mem)
2155: tputs(sc_eos_clear, 1, putchr);
2156: else
2157: tputs(sc_eol_clear, 1, putchr);
2158: #endif
1.1 etheisen 2159: }
2160:
2161: /*
2162: * Clear the bottom line of the display.
2163: * Leave the cursor at the beginning of the bottom line.
2164: */
2165: public void
2166: clear_bot()
2167: {
1.1.1.2 millert 2168: /*
2169: * If we're in a non-normal attribute mode, temporarily exit
2170: * the mode while we do the clear. Some terminals fill the
2171: * cleared area with the current attribute.
2172: */
1.1.1.3 shadchin 2173: if (oldbot)
2174: lower_left();
2175: else
2176: line_left();
2177:
2178: if (attrmode == AT_NORMAL)
1.1.1.2 millert 2179: clear_eol_bot();
1.1.1.3 shadchin 2180: else
2181: {
2182: int saved_attrmode = attrmode;
2183:
2184: at_exit();
1.1.1.2 millert 2185: clear_eol_bot();
1.1.1.3 shadchin 2186: at_enter(saved_attrmode);
1.1.1.2 millert 2187: }
1.1 etheisen 2188: }
2189:
2190: public void
1.1.1.3 shadchin 2191: at_enter(attr)
2192: int attr;
1.1 etheisen 2193: {
1.1.1.3 shadchin 2194: attr = apply_at_specials(attr);
1.1 etheisen 2195:
1.1.1.2 millert 2196: #if !MSDOS_COMPILER
1.1.1.3 shadchin 2197: /* The one with the most priority is last. */
2198: if (attr & AT_UNDERLINE)
2199: tputs(sc_u_in, 1, putchr);
2200: if (attr & AT_BOLD)
2201: tputs(sc_b_in, 1, putchr);
2202: if (attr & AT_BLINK)
2203: tputs(sc_bl_in, 1, putchr);
2204: if (attr & AT_STANDOUT)
2205: tputs(sc_s_in, 1, putchr);
1.1.1.2 millert 2206: #else
2207: flush();
1.1.1.3 shadchin 2208: /* The one with the most priority is first. */
2209: if (attr & AT_STANDOUT)
2210: {
2211: SETCOLORS(so_fg_color, so_bg_color);
2212: } else if (attr & AT_BLINK)
2213: {
2214: SETCOLORS(bl_fg_color, bl_bg_color);
2215: }
2216: else if (attr & AT_BOLD)
2217: {
2218: SETCOLORS(bo_fg_color, bo_bg_color);
2219: }
2220: else if (attr & AT_UNDERLINE)
2221: {
2222: SETCOLORS(ul_fg_color, ul_bg_color);
2223: }
1.1.1.2 millert 2224: #endif
1.1 etheisen 2225:
1.1.1.3 shadchin 2226: attrmode = attr;
1.1 etheisen 2227: }
2228:
2229: public void
1.1.1.3 shadchin 2230: at_exit()
1.1 etheisen 2231: {
1.1.1.2 millert 2232: #if !MSDOS_COMPILER
1.1.1.3 shadchin 2233: /* Undo things in the reverse order we did them. */
2234: if (attrmode & AT_STANDOUT)
2235: tputs(sc_s_out, 1, putchr);
2236: if (attrmode & AT_BLINK)
2237: tputs(sc_bl_out, 1, putchr);
2238: if (attrmode & AT_BOLD)
2239: tputs(sc_b_out, 1, putchr);
2240: if (attrmode & AT_UNDERLINE)
2241: tputs(sc_u_out, 1, putchr);
1.1.1.2 millert 2242: #else
2243: flush();
2244: SETCOLORS(nm_fg_color, nm_bg_color);
2245: #endif
1.1.1.3 shadchin 2246:
1.1.1.2 millert 2247: attrmode = AT_NORMAL;
1.1 etheisen 2248: }
2249:
2250: public void
1.1.1.3 shadchin 2251: at_switch(attr)
2252: int attr;
1.1 etheisen 2253: {
1.1.1.3 shadchin 2254: int new_attrmode = apply_at_specials(attr);
2255: int ignore_modes = AT_ANSI;
1.1 etheisen 2256:
1.1.1.3 shadchin 2257: if ((new_attrmode & ~ignore_modes) != (attrmode & ~ignore_modes))
2258: {
2259: at_exit();
2260: at_enter(attr);
2261: }
1.1 etheisen 2262: }
2263:
1.1.1.3 shadchin 2264: public int
2265: is_at_equiv(attr1, attr2)
2266: int attr1;
2267: int attr2;
1.1 etheisen 2268: {
1.1.1.3 shadchin 2269: attr1 = apply_at_specials(attr1);
2270: attr2 = apply_at_specials(attr2);
2271:
2272: return (attr1 == attr2);
1.1 etheisen 2273: }
2274:
1.1.1.3 shadchin 2275: public int
2276: apply_at_specials(attr)
2277: int attr;
1.1 etheisen 2278: {
1.1.1.3 shadchin 2279: if (attr & AT_BINARY)
2280: attr |= binattr;
2281: if (attr & AT_HILITE)
2282: attr |= AT_STANDOUT;
2283: attr &= ~(AT_BINARY|AT_HILITE);
2284:
2285: return attr;
1.1 etheisen 2286: }
2287:
1.1.1.2 millert 2288: #if 0 /* No longer used */
1.1 etheisen 2289: /*
2290: * Erase the character to the left of the cursor
2291: * and move the cursor left.
2292: */
2293: public void
2294: backspace()
2295: {
1.1.1.2 millert 2296: #if !MSDOS_COMPILER
1.1 etheisen 2297: /*
1.1.1.2 millert 2298: * Erase the previous character by overstriking with a space.
1.1 etheisen 2299: */
2300: tputs(sc_backspace, 1, putchr);
2301: putchr(' ');
2302: tputs(sc_backspace, 1, putchr);
1.1.1.2 millert 2303: #else
2304: #if MSDOS_COMPILER==MSOFTC
2305: struct rccoord tpos;
2306:
2307: flush();
2308: tpos = _gettextposition();
2309: if (tpos.col <= 1)
2310: return;
2311: _settextposition(tpos.row, tpos.col-1);
2312: _outtext(" ");
2313: _settextposition(tpos.row, tpos.col-1);
2314: #else
2315: #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
2316: cputs("\b");
2317: #else
2318: #if MSDOS_COMPILER==WIN32C
2319: COORD cpos;
2320: DWORD cChars;
2321: CONSOLE_SCREEN_BUFFER_INFO scr;
2322:
2323: flush();
2324: GetConsoleScreenBufferInfo(con_out, &scr);
2325: cpos = scr.dwCursorPosition;
2326: if (cpos.X <= 0)
2327: return;
2328: cpos.X--;
2329: SetConsoleCursorPosition(con_out, cpos);
2330: FillConsoleOutputCharacter(con_out, (TCHAR)' ', 1, cpos, &cChars);
2331: SetConsoleCursorPosition(con_out, cpos);
2332: #endif
2333: #endif
2334: #endif
2335: #endif
1.1 etheisen 2336: }
1.1.1.2 millert 2337: #endif /* 0 */
1.1 etheisen 2338:
2339: /*
2340: * Output a plain backspace, without erasing the previous char.
2341: */
2342: public void
2343: putbs()
2344: {
1.1.1.2 millert 2345: #if !MSDOS_COMPILER
1.1 etheisen 2346: tputs(sc_backspace, 1, putchr);
1.1.1.2 millert 2347: #else
2348: int row, col;
2349:
2350: flush();
2351: {
2352: #if MSDOS_COMPILER==MSOFTC
2353: struct rccoord tpos;
2354: tpos = _gettextposition();
2355: row = tpos.row;
2356: col = tpos.col;
2357: #else
2358: #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
2359: row = wherey();
2360: col = wherex();
2361: #else
2362: #if MSDOS_COMPILER==WIN32C
2363: CONSOLE_SCREEN_BUFFER_INFO scr;
2364: GetConsoleScreenBufferInfo(con_out, &scr);
2365: row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1;
2366: col = scr.dwCursorPosition.X - scr.srWindow.Left + 1;
2367: #endif
2368: #endif
2369: #endif
2370: }
2371: if (col <= 1)
2372: return;
2373: _settextposition(row, col-1);
2374: #endif /* MSDOS_COMPILER */
1.1 etheisen 2375: }
1.1.1.2 millert 2376:
2377: #if MSDOS_COMPILER==WIN32C
2378: /*
2379: * Determine whether an input character is waiting to be read.
2380: */
2381: static int
2382: win32_kbhit(tty)
2383: HANDLE tty;
2384: {
2385: INPUT_RECORD ip;
2386: DWORD read;
2387:
2388: if (keyCount > 0)
2389: return (TRUE);
2390:
2391: currentKey.ascii = 0;
2392: currentKey.scan = 0;
2393:
2394: /*
2395: * Wait for a real key-down event, but
2396: * ignore SHIFT and CONTROL key events.
2397: */
2398: do
2399: {
2400: PeekConsoleInput(tty, &ip, 1, &read);
2401: if (read == 0)
2402: return (FALSE);
2403: ReadConsoleInput(tty, &ip, 1, &read);
2404: } while (ip.EventType != KEY_EVENT ||
2405: ip.Event.KeyEvent.bKeyDown != TRUE ||
2406: ip.Event.KeyEvent.wVirtualScanCode == 0 ||
2407: ip.Event.KeyEvent.wVirtualKeyCode == VK_SHIFT ||
2408: ip.Event.KeyEvent.wVirtualKeyCode == VK_CONTROL ||
2409: ip.Event.KeyEvent.wVirtualKeyCode == VK_MENU);
2410:
2411: currentKey.ascii = ip.Event.KeyEvent.uChar.AsciiChar;
2412: currentKey.scan = ip.Event.KeyEvent.wVirtualScanCode;
2413: keyCount = ip.Event.KeyEvent.wRepeatCount;
2414:
2415: if (ip.Event.KeyEvent.dwControlKeyState &
2416: (LEFT_ALT_PRESSED | RIGHT_ALT_PRESSED))
2417: {
2418: switch (currentKey.scan)
2419: {
2420: case PCK_ALT_E: /* letter 'E' */
2421: currentKey.ascii = 0;
2422: break;
2423: }
2424: } else if (ip.Event.KeyEvent.dwControlKeyState &
2425: (LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED))
2426: {
2427: switch (currentKey.scan)
2428: {
2429: case PCK_RIGHT: /* right arrow */
2430: currentKey.scan = PCK_CTL_RIGHT;
2431: break;
2432: case PCK_LEFT: /* left arrow */
2433: currentKey.scan = PCK_CTL_LEFT;
2434: break;
2435: case PCK_DELETE: /* delete */
2436: currentKey.scan = PCK_CTL_DELETE;
2437: break;
2438: }
2439: }
2440: return (TRUE);
2441: }
2442:
2443: /*
2444: * Read a character from the keyboard.
2445: */
2446: public char
2447: WIN32getch(tty)
2448: int tty;
2449: {
2450: int ascii;
2451:
2452: if (pending_scancode)
2453: {
2454: pending_scancode = 0;
2455: return ((char)(currentKey.scan & 0x00FF));
2456: }
2457:
2458: while (win32_kbhit((HANDLE)tty) == FALSE)
2459: {
2460: Sleep(20);
2461: if (ABORT_SIGS())
2462: return ('\003');
2463: continue;
2464: }
2465: keyCount --;
2466: ascii = currentKey.ascii;
2467: /*
2468: * On PC's, the extended keys return a 2 byte sequence beginning
2469: * with '00', so if the ascii code is 00, the next byte will be
2470: * the lsb of the scan code.
2471: */
2472: pending_scancode = (ascii == 0x00);
2473: return ((char)ascii);
1.1.1.3 shadchin 2474: }
2475: #endif
2476:
2477: #if MSDOS_COMPILER
2478: /*
2479: */
2480: public void
2481: WIN32setcolors(fg, bg)
2482: int fg;
2483: int bg;
2484: {
2485: SETCOLORS(fg, bg);
2486: }
2487:
2488: /*
2489: */
2490: public void
2491: WIN32textout(text, len)
2492: char *text;
2493: int len;
2494: {
2495: #if MSDOS_COMPILER==WIN32C
2496: DWORD written;
2497: WriteConsole(con_out, text, len, &written, NULL);
2498: #else
2499: char c = text[len];
2500: text[len] = '\0';
2501: cputs(text);
2502: text[len] = c;
2503: #endif
1.1.1.2 millert 2504: }
2505: #endif
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