/* * Copyright (C) 1984-2011 Mark Nudelman * * You may distribute under the terms of either the GNU General Public * License or the Less License, as specified in the README file. * * For more information about less, or for information on how to * contact the author, see the README file. */ /* * Routines which deal with the characteristics of the terminal. * Uses termcap to be as terminal-independent as possible. */ #include "less.h" #include "cmd.h" #if MSDOS_COMPILER #include "pckeys.h" #if MSDOS_COMPILER==MSOFTC #include #else #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC #include #if MSDOS_COMPILER==DJGPPC #include extern int fd0; #endif #else #if MSDOS_COMPILER==WIN32C #include #endif #endif #endif #include #else #if HAVE_SYS_IOCTL_H #include #endif #if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS #include #else #if HAVE_TERMIO_H #include #else #if HAVE_SGSTAT_H #include #else #include #endif #endif #endif #if HAVE_TERMCAP_H #include #endif #ifdef _OSK #include #endif #if OS2 #include #include "pckeys.h" #endif #if HAVE_SYS_STREAM_H #include #endif #if HAVE_SYS_PTEM_H #include #endif #endif /* MSDOS_COMPILER */ /* * Check for broken termios package that forces you to manually * set the line discipline. */ #ifdef __ultrix__ #define MUST_SET_LINE_DISCIPLINE 1 #else #define MUST_SET_LINE_DISCIPLINE 0 #endif #if OS2 #define DEFAULT_TERM "ansi" static char *windowid; #else #define DEFAULT_TERM "unknown" #endif #if MSDOS_COMPILER==MSOFTC static int videopages; static long msec_loops; static int flash_created = 0; #define SETCOLORS(fg,bg) { _settextcolor(fg); _setbkcolor(bg); } #endif #if MSDOS_COMPILER==BORLANDC static unsigned short *whitescreen; static int flash_created = 0; #endif #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC #define _settextposition(y,x) gotoxy(x,y) #define _clearscreen(m) clrscr() #define _outtext(s) cputs(s) #define SETCOLORS(fg,bg) { textcolor(fg); textbackground(bg); } extern int sc_height; #endif #if MSDOS_COMPILER==WIN32C struct keyRecord { int ascii; int scan; } currentKey; static int keyCount = 0; static WORD curr_attr; static int pending_scancode = 0; static WORD *whitescreen; static HANDLE con_out_save = INVALID_HANDLE_VALUE; /* previous console */ static HANDLE con_out_ours = INVALID_HANDLE_VALUE; /* our own */ HANDLE con_out = INVALID_HANDLE_VALUE; /* current console */ extern int quitting; static void win32_init_term(); static void win32_deinit_term(); #define FG_COLORS (FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_INTENSITY) #define BG_COLORS (BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE | BACKGROUND_INTENSITY) #define MAKEATTR(fg,bg) ((WORD)((fg)|((bg)<<4))) #define SETCOLORS(fg,bg) { curr_attr = MAKEATTR(fg,bg); \ if (SetConsoleTextAttribute(con_out, curr_attr) == 0) \ error("SETCOLORS failed"); } #endif #if MSDOS_COMPILER public int nm_fg_color; /* Color of normal text */ public int nm_bg_color; public int bo_fg_color; /* Color of bold text */ public int bo_bg_color; public int ul_fg_color; /* Color of underlined text */ public int ul_bg_color; public int so_fg_color; /* Color of standout text */ public int so_bg_color; public int bl_fg_color; /* Color of blinking text */ public int bl_bg_color; static int sy_fg_color; /* Color of system text (before less) */ static int sy_bg_color; #else /* * Strings passed to tputs() to do various terminal functions. */ static char *sc_pad, /* Pad string */ *sc_home, /* Cursor home */ *sc_addline, /* Add line, scroll down following lines */ *sc_lower_left, /* Cursor to last line, first column */ *sc_return, /* Cursor to beginning of current line */ *sc_move, /* General cursor positioning */ *sc_clear, /* Clear screen */ *sc_eol_clear, /* Clear to end of line */ *sc_eos_clear, /* Clear to end of screen */ *sc_s_in, /* Enter standout (highlighted) mode */ *sc_s_out, /* Exit standout mode */ *sc_u_in, /* Enter underline mode */ *sc_u_out, /* Exit underline mode */ *sc_b_in, /* Enter bold mode */ *sc_b_out, /* Exit bold mode */ *sc_bl_in, /* Enter blink mode */ *sc_bl_out, /* Exit blink mode */ *sc_visual_bell, /* Visual bell (flash screen) sequence */ *sc_backspace, /* Backspace cursor */ *sc_s_keypad, /* Start keypad mode */ *sc_e_keypad, /* End keypad mode */ *sc_init, /* Startup terminal initialization */ *sc_deinit; /* Exit terminal de-initialization */ #endif static int init_done = 0; public int auto_wrap; /* Terminal does \r\n when write past margin */ public int ignaw; /* Terminal ignores \n immediately after wrap */ public int erase_char; /* The user's erase char */ public int erase2_char; /* The user's other erase char */ public int kill_char; /* The user's line-kill char */ public int werase_char; /* The user's word-erase char */ public int sc_width, sc_height; /* Height & width of screen */ public int bo_s_width, bo_e_width; /* Printing width of boldface seq */ public int ul_s_width, ul_e_width; /* Printing width of underline seq */ public int so_s_width, so_e_width; /* Printing width of standout seq */ public int bl_s_width, bl_e_width; /* Printing width of blink seq */ public int above_mem, below_mem; /* Memory retained above/below screen */ public int can_goto_line; /* Can move cursor to any line */ public int clear_bg; /* Clear fills with background color */ public int missing_cap = 0; /* Some capability is missing */ static int attrmode = AT_NORMAL; extern int binattr; #if !MSDOS_COMPILER static char *cheaper(); static void tmodes(); #endif /* * These two variables are sometimes defined in, * and needed by, the termcap library. */ #if MUST_DEFINE_OSPEED extern short ospeed; /* Terminal output baud rate */ extern char PC; /* Pad character */ #endif #ifdef _OSK short ospeed; char PC_, *UP, *BC; #endif extern int quiet; /* If VERY_QUIET, use visual bell for bell */ extern int no_back_scroll; extern int swindow; extern int no_init; extern int no_keypad; extern volatile sig_atomic_t sigs; extern int wscroll; extern int screen_trashed; extern int tty; extern int top_scroll; extern int oldbot; #if HILITE_SEARCH extern int hilite_search; #endif extern char *tgetstr(); extern char *tgoto(); /* * Change terminal to "raw mode", or restore to "normal" mode. * "Raw mode" means * 1. An outstanding read will complete on receipt of a single keystroke. * 2. Input is not echoed. * 3. On output, \n is mapped to \r\n. * 4. \t is NOT expanded into spaces. * 5. Signal-causing characters such as ctrl-C (interrupt), * etc. are NOT disabled. * It doesn't matter whether an input \n is mapped to \r, or vice versa. */ public void raw_mode(on) int on; { static int curr_on = 0; if (on == curr_on) return; erase2_char = '\b'; /* in case OS doesn't know about erase2 */ #if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS { struct termios s; static struct termios save_term; static int saved_term = 0; if (on) { /* * Get terminal modes. */ tcgetattr(tty, &s); /* * Save modes and set certain variables dependent on modes. */ if (!saved_term) { save_term = s; saved_term = 1; } #if HAVE_OSPEED switch (cfgetospeed(&s)) { #ifdef B0 case B0: ospeed = 0; break; #endif #ifdef B50 case B50: ospeed = 1; break; #endif #ifdef B75 case B75: ospeed = 2; break; #endif #ifdef B110 case B110: ospeed = 3; break; #endif #ifdef B134 case B134: ospeed = 4; break; #endif #ifdef B150 case B150: ospeed = 5; break; #endif #ifdef B200 case B200: ospeed = 6; break; #endif #ifdef B300 case B300: ospeed = 7; break; #endif #ifdef B600 case B600: ospeed = 8; break; #endif #ifdef B1200 case B1200: ospeed = 9; break; #endif #ifdef B1800 case B1800: ospeed = 10; break; #endif #ifdef B2400 case B2400: ospeed = 11; break; #endif #ifdef B4800 case B4800: ospeed = 12; break; #endif #ifdef B9600 case B9600: ospeed = 13; break; #endif #ifdef EXTA case EXTA: ospeed = 14; break; #endif #ifdef EXTB case EXTB: ospeed = 15; break; #endif #ifdef B57600 case B57600: ospeed = 16; break; #endif #ifdef B115200 case B115200: ospeed = 17; break; #endif default: ; } #endif erase_char = s.c_cc[VERASE]; #ifdef VERASE2 erase2_char = s.c_cc[VERASE2]; #endif kill_char = s.c_cc[VKILL]; #ifdef VWERASE werase_char = s.c_cc[VWERASE]; #else werase_char = CONTROL('W'); #endif /* * Set the modes to the way we want them. */ s.c_lflag &= ~(0 #ifdef ICANON | ICANON #endif #ifdef ECHO | ECHO #endif #ifdef ECHOE | ECHOE #endif #ifdef ECHOK | ECHOK #endif #if ECHONL | ECHONL #endif ); s.c_oflag |= (0 #ifdef OXTABS | OXTABS #else #ifdef TAB3 | TAB3 #else #ifdef XTABS | XTABS #endif #endif #endif #ifdef OPOST | OPOST #endif #ifdef ONLCR | ONLCR #endif ); s.c_oflag &= ~(0 #ifdef ONOEOT | ONOEOT #endif #ifdef OCRNL | OCRNL #endif #ifdef ONOCR | ONOCR #endif #ifdef ONLRET | ONLRET #endif ); s.c_cc[VMIN] = 1; s.c_cc[VTIME] = 0; #ifdef VLNEXT s.c_cc[VLNEXT] = 0; #endif #ifdef VDSUSP s.c_cc[VDSUSP] = 0; #endif #if MUST_SET_LINE_DISCIPLINE /* * System's termios is broken; need to explicitly * request TERMIODISC line discipline. */ s.c_line = TERMIODISC; #endif } else { /* * Restore saved modes. */ s = save_term; } tcsetattr(tty, TCSASOFT | TCSADRAIN, &s); #if HAVE_FSYNC fsync(tty); #endif #if MUST_SET_LINE_DISCIPLINE if (!on) { /* * Broken termios *ignores* any line discipline * except TERMIODISC. A different old line discipline * is therefore not restored, yet. Restore the old * line discipline by hand. */ ioctl(tty, TIOCSETD, &save_term.c_line); } #endif } #else #ifdef TCGETA { struct termio s; static struct termio save_term; static int saved_term = 0; if (on) { /* * Get terminal modes. */ ioctl(tty, TCGETA, &s); /* * Save modes and set certain variables dependent on modes. */ if (!saved_term) { save_term = s; saved_term = 1; } #if HAVE_OSPEED ospeed = s.c_cflag & CBAUD; #endif erase_char = s.c_cc[VERASE]; kill_char = s.c_cc[VKILL]; #ifdef VWERASE werase_char = s.c_cc[VWERASE]; #else werase_char = CONTROL('W'); #endif /* * Set the modes to the way we want them. */ s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); s.c_oflag |= (OPOST|ONLCR|TAB3); s.c_oflag &= ~(OCRNL|ONOCR|ONLRET); s.c_cc[VMIN] = 1; s.c_cc[VTIME] = 0; } else { /* * Restore saved modes. */ s = save_term; } ioctl(tty, TCSETAW, &s); } #else #ifdef TIOCGETP { struct sgttyb s; static struct sgttyb save_term; static int saved_term = 0; if (on) { /* * Get terminal modes. */ ioctl(tty, TIOCGETP, &s); /* * Save modes and set certain variables dependent on modes. */ if (!saved_term) { save_term = s; saved_term = 1; } #if HAVE_OSPEED ospeed = s.sg_ospeed; #endif erase_char = s.sg_erase; kill_char = s.sg_kill; werase_char = CONTROL('W'); /* * Set the modes to the way we want them. */ s.sg_flags |= CBREAK; s.sg_flags &= ~(ECHO|XTABS); } else { /* * Restore saved modes. */ s = save_term; } ioctl(tty, TIOCSETN, &s); } #else #ifdef _OSK { struct sgbuf s; static struct sgbuf save_term; static int saved_term = 0; if (on) { /* * Get terminal modes. */ _gs_opt(tty, &s); /* * Save modes and set certain variables dependent on modes. */ if (!saved_term) { save_term = s; saved_term = 1; } erase_char = s.sg_bspch; kill_char = s.sg_dlnch; werase_char = CONTROL('W'); /* * Set the modes to the way we want them. */ s.sg_echo = 0; s.sg_eofch = 0; s.sg_pause = 0; s.sg_psch = 0; } else { /* * Restore saved modes. */ s = save_term; } _ss_opt(tty, &s); } #else /* MS-DOS, Windows, or OS2 */ #if OS2 /* OS2 */ LSIGNAL(SIGINT, SIG_IGN); #endif erase_char = '\b'; #if MSDOS_COMPILER==DJGPPC kill_char = CONTROL('U'); /* * So that when we shell out or run another program, its * stdin is in cooked mode. We do not switch stdin to binary * mode if fd0 is zero, since that means we were called before * tty was reopened in open_getchr, in which case we would be * changing the original stdin device outside less. */ if (fd0 != 0) setmode(0, on ? O_BINARY : O_TEXT); #else kill_char = ESC; #endif werase_char = CONTROL('W'); #endif #endif #endif #endif curr_on = on; } #if !MSDOS_COMPILER /* * Some glue to prevent calling termcap functions if tgetent() failed. */ static int hardcopy; static char * ltget_env(capname) char *capname; { char name[16]; char *s; s = lgetenv("LESS_TERMCAP_DEBUG"); if (s != NULL && *s != '\0') { struct env { struct env *next; char *name; char *value; }; static struct env *envs = NULL; struct env *p; size_t len; for (p = envs; p != NULL; p = p->next) if (strcmp(p->name, capname) == 0) return p->value; p = (struct env *) ecalloc(1, sizeof(struct env)); p->name = save(capname); len = strlen(capname) + 3; p->value = (char *) ecalloc(len, sizeof(char)); snprintf(p->value, len, "<%s>", capname); p->next = envs; envs = p; return p->value; } strlcpy(name, "LESS_TERMCAP_", sizeof(name)); strlcat(name, capname, sizeof(name)); return (lgetenv(name)); } static int ltgetflag(capname) char *capname; { char *s; if ((s = ltget_env(capname)) != NULL) return (*s != '\0' && *s != '0'); if (hardcopy) return (0); return (tgetflag(capname)); } static int ltgetnum(capname) char *capname; { char *s; if ((s = ltget_env(capname)) != NULL) return (atoi(s)); if (hardcopy) return (-1); return (tgetnum(capname)); } static char * ltgetstr(capname, pp) char *capname; char **pp; { char *s; if ((s = ltget_env(capname)) != NULL) return (s); if (hardcopy) return (NULL); return (tgetstr(capname, pp)); } #endif /* MSDOS_COMPILER */ /* * Get size of the output screen. */ public void scrsize() { register char *s; int sys_height; int sys_width; #if !MSDOS_COMPILER int n; #endif #define DEF_SC_WIDTH 80 #if MSDOS_COMPILER #define DEF_SC_HEIGHT 25 #else #define DEF_SC_HEIGHT 24 #endif sys_width = sys_height = 0; #if MSDOS_COMPILER==MSOFTC { struct videoconfig w; _getvideoconfig(&w); sys_height = w.numtextrows; sys_width = w.numtextcols; } #else #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC { struct text_info w; gettextinfo(&w); sys_height = w.screenheight; sys_width = w.screenwidth; } #else #if MSDOS_COMPILER==WIN32C { CONSOLE_SCREEN_BUFFER_INFO scr; GetConsoleScreenBufferInfo(con_out, &scr); sys_height = scr.srWindow.Bottom - scr.srWindow.Top + 1; sys_width = scr.srWindow.Right - scr.srWindow.Left + 1; } #else #if OS2 { int s[2]; _scrsize(s); sys_width = s[0]; sys_height = s[1]; /* * When using terminal emulators for XFree86/OS2, the * _scrsize function does not work well. * Call the scrsize.exe program to get the window size. */ windowid = getenv("WINDOWID"); if (windowid != NULL) { FILE *fd = popen("scrsize", "rt"); if (fd != NULL) { int w, h; fscanf(fd, "%i %i", &w, &h); if (w > 0 && h > 0) { sys_width = w; sys_height = h; } pclose(fd); } } } #else #ifdef TIOCGWINSZ { struct winsize w; if (ioctl(2, TIOCGWINSZ, &w) == 0) { if (w.ws_row > 0) sys_height = w.ws_row; if (w.ws_col > 0) sys_width = w.ws_col; } } #else #ifdef WIOCGETD { struct uwdata w; if (ioctl(2, WIOCGETD, &w) == 0) { if (w.uw_height > 0) sys_height = w.uw_height / w.uw_vs; if (w.uw_width > 0) sys_width = w.uw_width / w.uw_hs; } } #endif #endif #endif #endif #endif #endif if (sys_height > 0) sc_height = sys_height; else if ((s = lgetenv("LINES")) != NULL) sc_height = atoi(s); #if !MSDOS_COMPILER else if ((n = ltgetnum("li")) > 0) sc_height = n; #endif else sc_height = DEF_SC_HEIGHT; if (sys_width > 0) sc_width = sys_width; else if ((s = lgetenv("COLUMNS")) != NULL) sc_width = atoi(s); #if !MSDOS_COMPILER else if ((n = ltgetnum("co")) > 0) sc_width = n; #endif else sc_width = DEF_SC_WIDTH; } #if MSDOS_COMPILER==MSOFTC /* * Figure out how many empty loops it takes to delay a millisecond. */ static void get_clock() { clock_t start; /* * Get synchronized at the start of a tick. */ start = clock(); while (clock() == start) ; /* * Now count loops till the next tick. */ start = clock(); msec_loops = 0; while (clock() == start) msec_loops++; /* * Convert from (loops per clock) to (loops per millisecond). */ msec_loops *= CLOCKS_PER_SEC; msec_loops /= 1000; } /* * Delay for a specified number of milliseconds. */ static void dummy_func() { static long delay_dummy = 0; delay_dummy++; } static void delay(msec) int msec; { long i; while (msec-- > 0) { for (i = 0; i < msec_loops; i++) { /* * Make it look like we're doing something here, * so the optimizer doesn't remove the whole loop. */ dummy_func(); } } } #endif /* * Return the characters actually input by a "special" key. */ public char * special_key_str(key) int key; { static char tbuf[40]; char *s; #if MSDOS_COMPILER || OS2 static char k_right[] = { '\340', PCK_RIGHT, 0 }; static char k_left[] = { '\340', PCK_LEFT, 0 }; static char k_ctl_right[] = { '\340', PCK_CTL_RIGHT, 0 }; static char k_ctl_left[] = { '\340', PCK_CTL_LEFT, 0 }; static char k_insert[] = { '\340', PCK_INSERT, 0 }; static char k_delete[] = { '\340', PCK_DELETE, 0 }; static char k_ctl_delete[] = { '\340', PCK_CTL_DELETE, 0 }; static char k_ctl_backspace[] = { '\177', 0 }; static char k_home[] = { '\340', PCK_HOME, 0 }; static char k_end[] = { '\340', PCK_END, 0 }; static char k_up[] = { '\340', PCK_UP, 0 }; static char k_down[] = { '\340', PCK_DOWN, 0 }; static char k_backtab[] = { '\340', PCK_SHIFT_TAB, 0 }; static char k_pagedown[] = { '\340', PCK_PAGEDOWN, 0 }; static char k_pageup[] = { '\340', PCK_PAGEUP, 0 }; static char k_f1[] = { '\340', PCK_F1, 0 }; #endif #if !MSDOS_COMPILER char *sp = tbuf; #endif switch (key) { #if OS2 /* * If windowid is not NULL, assume less is executed in * the XFree86 environment. */ case SK_RIGHT_ARROW: s = windowid ? ltgetstr("kr", &sp) : k_right; break; case SK_LEFT_ARROW: s = windowid ? ltgetstr("kl", &sp) : k_left; break; case SK_UP_ARROW: s = windowid ? ltgetstr("ku", &sp) : k_up; break; case SK_DOWN_ARROW: s = windowid ? ltgetstr("kd", &sp) : k_down; break; case SK_PAGE_UP: s = windowid ? ltgetstr("kP", &sp) : k_pageup; break; case SK_PAGE_DOWN: s = windowid ? ltgetstr("kN", &sp) : k_pagedown; break; case SK_HOME: s = windowid ? ltgetstr("kh", &sp) : k_home; break; case SK_END: s = windowid ? ltgetstr("@7", &sp) : k_end; break; case SK_DELETE: if (windowid) { s = ltgetstr("kD", &sp); if (s == NULL) { tbuf[0] = '\177'; tbuf[1] = '\0'; s = tbuf; } } else s = k_delete; break; #endif #if MSDOS_COMPILER case SK_RIGHT_ARROW: s = k_right; break; case SK_LEFT_ARROW: s = k_left; break; case SK_UP_ARROW: s = k_up; break; case SK_DOWN_ARROW: s = k_down; break; case SK_PAGE_UP: s = k_pageup; break; case SK_PAGE_DOWN: s = k_pagedown; break; case SK_HOME: s = k_home; break; case SK_END: s = k_end; break; case SK_DELETE: s = k_delete; break; #endif #if MSDOS_COMPILER || OS2 case SK_INSERT: s = k_insert; break; case SK_CTL_LEFT_ARROW: s = k_ctl_left; break; case SK_CTL_RIGHT_ARROW: s = k_ctl_right; break; case SK_CTL_BACKSPACE: s = k_ctl_backspace; break; case SK_CTL_DELETE: s = k_ctl_delete; break; case SK_F1: s = k_f1; break; case SK_BACKTAB: s = k_backtab; break; #else case SK_RIGHT_ARROW: s = ltgetstr("kr", &sp); break; case SK_LEFT_ARROW: s = ltgetstr("kl", &sp); break; case SK_UP_ARROW: s = ltgetstr("ku", &sp); break; case SK_DOWN_ARROW: s = ltgetstr("kd", &sp); break; case SK_PAGE_UP: s = ltgetstr("kP", &sp); break; case SK_PAGE_DOWN: s = ltgetstr("kN", &sp); break; case SK_HOME: s = ltgetstr("kh", &sp); break; case SK_END: s = ltgetstr("@7", &sp); break; case SK_DELETE: s = ltgetstr("kD", &sp); if (s == NULL) { tbuf[0] = '\177'; tbuf[1] = '\0'; s = tbuf; } break; #endif case SK_CONTROL_K: tbuf[0] = CONTROL('K'); tbuf[1] = '\0'; s = tbuf; break; default: return (NULL); } return (s); } /* * Get terminal capabilities via termcap. */ public void get_term() { #if MSDOS_COMPILER auto_wrap = 1; ignaw = 0; can_goto_line = 1; clear_bg = 1; /* * Set up default colors. * The xx_s_width and xx_e_width vars are already initialized to 0. */ #if MSDOS_COMPILER==MSOFTC sy_bg_color = _getbkcolor(); sy_fg_color = _gettextcolor(); get_clock(); #else #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC { struct text_info w; gettextinfo(&w); sy_bg_color = (w.attribute >> 4) & 0x0F; sy_fg_color = (w.attribute >> 0) & 0x0F; } #else #if MSDOS_COMPILER==WIN32C { DWORD nread; CONSOLE_SCREEN_BUFFER_INFO scr; con_out_save = con_out = GetStdHandle(STD_OUTPUT_HANDLE); /* * Always open stdin in binary. Note this *must* be done * before any file operations have been done on fd0. */ SET_BINARY(0); GetConsoleScreenBufferInfo(con_out, &scr); ReadConsoleOutputAttribute(con_out, &curr_attr, 1, scr.dwCursorPosition, &nread); sy_bg_color = (curr_attr & BG_COLORS) >> 4; /* normalize */ sy_fg_color = curr_attr & FG_COLORS; } #endif #endif #endif nm_fg_color = sy_fg_color; nm_bg_color = sy_bg_color; bo_fg_color = 11; bo_bg_color = 0; ul_fg_color = 9; ul_bg_color = 0; so_fg_color = 15; so_bg_color = 9; bl_fg_color = 15; bl_bg_color = 0; /* * Get size of the screen. */ scrsize(); pos_init(); #else /* !MSDOS_COMPILER */ char *sp; register char *t1, *t2; char *term; char termbuf[TERMBUF_SIZE]; static char sbuf[TERMSBUF_SIZE]; #if OS2 /* * Make sure the termcap database is available. */ sp = lgetenv("TERMCAP"); if (sp == NULL || *sp == '\0') { char *termcap; if ((sp = homefile("termcap.dat")) != NULL) { size_t len = strlen(sp) + 9; termcap = (char *) ecalloc(len, sizeof(char)); snprintf(termcap, len, "TERMCAP=%s", sp); free(sp); putenv(termcap); } } #endif /* * Find out what kind of terminal this is. */ if ((term = lgetenv("TERM")) == NULL) term = DEFAULT_TERM; hardcopy = 0; if (tgetent(termbuf, term) != TGETENT_OK) hardcopy = 1; if (ltgetflag("hc")) hardcopy = 1; /* * Get size of the screen. */ scrsize(); pos_init(); auto_wrap = ltgetflag("am"); ignaw = ltgetflag("xn"); above_mem = ltgetflag("da"); below_mem = ltgetflag("db"); clear_bg = ltgetflag("ut"); /* * Assumes termcap variable "sg" is the printing width of: * the standout sequence, the end standout sequence, * the underline sequence, the end underline sequence, * the boldface sequence, and the end boldface sequence. */ if ((so_s_width = ltgetnum("sg")) < 0) so_s_width = 0; so_e_width = so_s_width; bo_s_width = bo_e_width = so_s_width; ul_s_width = ul_e_width = so_s_width; bl_s_width = bl_e_width = so_s_width; #if HILITE_SEARCH if (so_s_width > 0 || so_e_width > 0) /* * Disable highlighting by default on magic cookie terminals. * Turning on highlighting might change the displayed width * of a line, causing the display to get messed up. * The user can turn it back on with -g, * but she won't like the results. */ hilite_search = 0; #endif /* * Get various string-valued capabilities. */ sp = sbuf; #if HAVE_OSPEED sc_pad = ltgetstr("pc", &sp); if (sc_pad != NULL) PC = *sc_pad; #endif sc_s_keypad = ltgetstr("ks", &sp); if (sc_s_keypad == NULL) sc_s_keypad = ""; sc_e_keypad = ltgetstr("ke", &sp); if (sc_e_keypad == NULL) sc_e_keypad = ""; sc_init = ltgetstr("ti", &sp); if (sc_init == NULL) sc_init = ""; sc_deinit= ltgetstr("te", &sp); if (sc_deinit == NULL) sc_deinit = ""; sc_eol_clear = ltgetstr("ce", &sp); if (sc_eol_clear == NULL || *sc_eol_clear == '\0') { missing_cap = 1; sc_eol_clear = ""; } sc_eos_clear = ltgetstr("cd", &sp); if (below_mem && (sc_eos_clear == NULL || *sc_eos_clear == '\0')) { missing_cap = 1; sc_eos_clear = ""; } sc_clear = ltgetstr("cl", &sp); if (sc_clear == NULL || *sc_clear == '\0') { missing_cap = 1; sc_clear = "\n\n"; } sc_move = ltgetstr("cm", &sp); if (sc_move == NULL || *sc_move == '\0') { /* * This is not an error here, because we don't * always need sc_move. * We need it only if we don't have home or lower-left. */ sc_move = ""; can_goto_line = 0; } else can_goto_line = 1; tmodes("so", "se", &sc_s_in, &sc_s_out, "", "", &sp); tmodes("us", "ue", &sc_u_in, &sc_u_out, sc_s_in, sc_s_out, &sp); tmodes("md", "me", &sc_b_in, &sc_b_out, sc_s_in, sc_s_out, &sp); tmodes("mb", "me", &sc_bl_in, &sc_bl_out, sc_s_in, sc_s_out, &sp); sc_visual_bell = ltgetstr("vb", &sp); if (sc_visual_bell == NULL) sc_visual_bell = ""; if (ltgetflag("bs")) sc_backspace = "\b"; else { sc_backspace = ltgetstr("bc", &sp); if (sc_backspace == NULL || *sc_backspace == '\0') sc_backspace = "\b"; } /* * Choose between using "ho" and "cm" ("home" and "cursor move") * to move the cursor to the upper left corner of the screen. */ t1 = ltgetstr("ho", &sp); if (t1 == NULL) t1 = ""; if (*sc_move == '\0') t2 = ""; else { strlcpy(sp, tgoto(sc_move, 0, 0), sbuf + sizeof(sbuf) - sp); t2 = sp; sp += strlen(sp) + 1; } sc_home = cheaper(t1, t2, "|\b^"); /* * Choose between using "ll" and "cm" ("lower left" and "cursor move") * to move the cursor to the lower left corner of the screen. */ t1 = ltgetstr("ll", &sp); if (t1 == NULL) t1 = ""; if (*sc_move == '\0') t2 = ""; else { strlcpy(sp, tgoto(sc_move, 0, sc_height-1), sbuf + sizeof(sbuf) - sp); t2 = sp; sp += strlen(sp) + 1; } sc_lower_left = cheaper(t1, t2, "\r"); /* * Get carriage return string. */ sc_return = ltgetstr("cr", &sp); if (sc_return == NULL) sc_return = "\r"; /* * Choose between using "al" or "sr" ("add line" or "scroll reverse") * to add a line at the top of the screen. */ t1 = ltgetstr("al", &sp); if (t1 == NULL) t1 = ""; t2 = ltgetstr("sr", &sp); if (t2 == NULL) t2 = ""; #if OS2 if (*t1 == '\0' && *t2 == '\0') sc_addline = ""; else #endif if (above_mem) sc_addline = t1; else sc_addline = cheaper(t1, t2, ""); if (*sc_addline == '\0') { /* * Force repaint on any backward movement. */ no_back_scroll = 1; } #endif /* MSDOS_COMPILER */ } #if !MSDOS_COMPILER /* * Return the cost of displaying a termcap string. * We use the trick of calling tputs, but as a char printing function * we give it inc_costcount, which just increments "costcount". * This tells us how many chars would be printed by using this string. * {{ Couldn't we just use strlen? }} */ static int costcount; /*ARGSUSED*/ static int inc_costcount(c) int c; { costcount++; return (c); } static int cost(t) char *t; { costcount = 0; tputs(t, sc_height, inc_costcount); return (costcount); } /* * Return the "best" of the two given termcap strings. * The best, if both exist, is the one with the lower * cost (see cost() function). */ static char * cheaper(t1, t2, def) char *t1, *t2; char *def; { if (*t1 == '\0' && *t2 == '\0') { missing_cap = 1; return (def); } if (*t1 == '\0') return (t2); if (*t2 == '\0') return (t1); if (cost(t1) < cost(t2)) return (t1); return (t2); } static void tmodes(incap, outcap, instr, outstr, def_instr, def_outstr, spp) char *incap; char *outcap; char **instr; char **outstr; char *def_instr; char *def_outstr; char **spp; { *instr = ltgetstr(incap, spp); if (*instr == NULL) { /* Use defaults. */ *instr = def_instr; *outstr = def_outstr; return; } *outstr = ltgetstr(outcap, spp); if (*outstr == NULL) /* No specific out capability; use "me". */ *outstr = ltgetstr("me", spp); if (*outstr == NULL) /* Don't even have "me"; use a null string. */ *outstr = ""; } #endif /* MSDOS_COMPILER */ /* * Below are the functions which perform all the * terminal-specific screen manipulation. */ #if MSDOS_COMPILER #if MSDOS_COMPILER==WIN32C static void _settextposition(int row, int col) { COORD cpos; CONSOLE_SCREEN_BUFFER_INFO csbi; GetConsoleScreenBufferInfo(con_out, &csbi); cpos.X = csbi.srWindow.Left + (col - 1); cpos.Y = csbi.srWindow.Top + (row - 1); SetConsoleCursorPosition(con_out, cpos); } #endif /* * Initialize the screen to the correct color at startup. */ static void initcolor() { SETCOLORS(nm_fg_color, nm_bg_color); #if 0 /* * This clears the screen at startup. This is different from * the behavior of other versions of less. Disable it for now. */ char *blanks; int row; int col; /* * Create a complete, blank screen using "normal" colors. */ SETCOLORS(nm_fg_color, nm_bg_color); blanks = (char *) ecalloc(width+1, sizeof(char)); for (col = 0; col < sc_width; col++) blanks[col] = ' '; blanks[sc_width] = '\0'; for (row = 0; row < sc_height; row++) _outtext(blanks); free(blanks); #endif } #endif #if MSDOS_COMPILER==WIN32C /* * Termcap-like init with a private win32 console. */ static void win32_init_term() { CONSOLE_SCREEN_BUFFER_INFO scr; COORD size; if (con_out_save == INVALID_HANDLE_VALUE) return; GetConsoleScreenBufferInfo(con_out_save, &scr); if (con_out_ours == INVALID_HANDLE_VALUE) { /* * Create our own screen buffer, so that we * may restore the original when done. */ con_out_ours = CreateConsoleScreenBuffer( GENERIC_WRITE | GENERIC_READ, FILE_SHARE_WRITE | FILE_SHARE_READ, (LPSECURITY_ATTRIBUTES) NULL, CONSOLE_TEXTMODE_BUFFER, (LPVOID) NULL); } size.X = scr.srWindow.Right - scr.srWindow.Left + 1; size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1; SetConsoleScreenBufferSize(con_out_ours, size); SetConsoleActiveScreenBuffer(con_out_ours); con_out = con_out_ours; } /* * Restore the startup console. */ static void win32_deinit_term() { if (con_out_save == INVALID_HANDLE_VALUE) return; if (quitting) (void) CloseHandle(con_out_ours); SetConsoleActiveScreenBuffer(con_out_save); con_out = con_out_save; } #endif /* * Initialize terminal */ public void init() { #if !MSDOS_COMPILER if (!no_init) tputs(sc_init, sc_height, putchr); if (!no_keypad) tputs(sc_s_keypad, sc_height, putchr); if (top_scroll) { int i; /* * This is nice to terminals with no alternate screen, * but with saved scrolled-off-the-top lines. This way, * no previous line is lost, but we start with a whole * screen to ourself. */ for (i = 1; i < sc_height; i++) putchr('\n'); } else line_left(); #else #if MSDOS_COMPILER==WIN32C if (!no_init) win32_init_term(); #endif initcolor(); flush(); #endif init_done = 1; } /* * Deinitialize terminal */ public void deinit() { if (!init_done) return; #if !MSDOS_COMPILER if (!no_keypad) tputs(sc_e_keypad, sc_height, putchr); if (!no_init) tputs(sc_deinit, sc_height, putchr); #else /* Restore system colors. */ SETCOLORS(sy_fg_color, sy_bg_color); #if MSDOS_COMPILER==WIN32C if (!no_init) win32_deinit_term(); #else /* Need clreol to make SETCOLORS take effect. */ clreol(); #endif #endif init_done = 0; } /* * Home cursor (move to upper left corner of screen). */ public void home() { #if !MSDOS_COMPILER tputs(sc_home, 1, putchr); #else flush(); _settextposition(1,1); #endif } /* * Add a blank line (called with cursor at home). * Should scroll the display down. */ public void add_line() { #if !MSDOS_COMPILER tputs(sc_addline, sc_height, putchr); #else flush(); #if MSDOS_COMPILER==MSOFTC _scrolltextwindow(_GSCROLLDOWN); _settextposition(1,1); #else #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC movetext(1,1, sc_width,sc_height-1, 1,2); gotoxy(1,1); clreol(); #else #if MSDOS_COMPILER==WIN32C { CHAR_INFO fillchar; SMALL_RECT rcSrc, rcClip; COORD new_org; CONSOLE_SCREEN_BUFFER_INFO csbi; GetConsoleScreenBufferInfo(con_out,&csbi); /* The clip rectangle is the entire visible screen. */ rcClip.Left = csbi.srWindow.Left; rcClip.Top = csbi.srWindow.Top; rcClip.Right = csbi.srWindow.Right; rcClip.Bottom = csbi.srWindow.Bottom; /* The source rectangle is the visible screen minus the last line. */ rcSrc = rcClip; rcSrc.Bottom--; /* Move the top left corner of the source window down one row. */ new_org.X = rcSrc.Left; new_org.Y = rcSrc.Top + 1; /* Fill the right character and attributes. */ fillchar.Char.AsciiChar = ' '; curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); fillchar.Attributes = curr_attr; ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); _settextposition(1,1); } #endif #endif #endif #endif } #if 0 /* * Remove the n topmost lines and scroll everything below it in the * window upward. This is needed to stop leaking the topmost line * into the scrollback buffer when we go down-one-line (in WIN32). */ public void remove_top(n) int n; { #if MSDOS_COMPILER==WIN32C SMALL_RECT rcSrc, rcClip; CHAR_INFO fillchar; COORD new_org; CONSOLE_SCREEN_BUFFER_INFO csbi; /* to get buffer info */ if (n >= sc_height - 1) { clear(); home(); return; } flush(); GetConsoleScreenBufferInfo(con_out, &csbi); /* Get the extent of all-visible-rows-but-the-last. */ rcSrc.Left = csbi.srWindow.Left; rcSrc.Top = csbi.srWindow.Top + n; rcSrc.Right = csbi.srWindow.Right; rcSrc.Bottom = csbi.srWindow.Bottom; /* Get the clip rectangle. */ rcClip.Left = rcSrc.Left; rcClip.Top = csbi.srWindow.Top; rcClip.Right = rcSrc.Right; rcClip.Bottom = rcSrc.Bottom ; /* Move the source window up n rows. */ new_org.X = rcSrc.Left; new_org.Y = rcSrc.Top - n; /* Fill the right character and attributes. */ fillchar.Char.AsciiChar = ' '; curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); fillchar.Attributes = curr_attr; ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); /* Position cursor on first blank line. */ goto_line(sc_height - n - 1); #endif } #endif #if MSDOS_COMPILER==WIN32C /* * Clear the screen. */ static void win32_clear() { /* * This will clear only the currently visible rows of the NT * console buffer, which means none of the precious scrollback * rows are touched making for faster scrolling. Note that, if * the window has fewer columns than the console buffer (i.e. * there is a horizontal scrollbar as well), the entire width * of the visible rows will be cleared. */ COORD topleft; DWORD nchars; DWORD winsz; CONSOLE_SCREEN_BUFFER_INFO csbi; /* get the number of cells in the current buffer */ GetConsoleScreenBufferInfo(con_out, &csbi); winsz = csbi.dwSize.X * (csbi.srWindow.Bottom - csbi.srWindow.Top + 1); topleft.X = 0; topleft.Y = csbi.srWindow.Top; curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); FillConsoleOutputCharacter(con_out, ' ', winsz, topleft, &nchars); FillConsoleOutputAttribute(con_out, curr_attr, winsz, topleft, &nchars); } /* * Remove the n topmost lines and scroll everything below it in the * window upward. */ public void win32_scroll_up(n) int n; { SMALL_RECT rcSrc, rcClip; CHAR_INFO fillchar; COORD topleft; COORD new_org; DWORD nchars; DWORD size; CONSOLE_SCREEN_BUFFER_INFO csbi; if (n <= 0) return; if (n >= sc_height - 1) { win32_clear(); _settextposition(1,1); return; } /* Get the extent of what will remain visible after scrolling. */ GetConsoleScreenBufferInfo(con_out, &csbi); rcSrc.Left = csbi.srWindow.Left; rcSrc.Top = csbi.srWindow.Top + n; rcSrc.Right = csbi.srWindow.Right; rcSrc.Bottom = csbi.srWindow.Bottom; /* Get the clip rectangle. */ rcClip.Left = rcSrc.Left; rcClip.Top = csbi.srWindow.Top; rcClip.Right = rcSrc.Right; rcClip.Bottom = rcSrc.Bottom ; /* Move the source text to the top of the screen. */ new_org.X = rcSrc.Left; new_org.Y = rcClip.Top; /* Fill the right character and attributes. */ fillchar.Char.AsciiChar = ' '; fillchar.Attributes = MAKEATTR(nm_fg_color, nm_bg_color); /* Scroll the window. */ SetConsoleTextAttribute(con_out, fillchar.Attributes); ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); /* Clear remaining lines at bottom. */ topleft.X = csbi.dwCursorPosition.X; topleft.Y = rcSrc.Bottom - n; size = (n * csbi.dwSize.X) + (rcSrc.Right - topleft.X); FillConsoleOutputCharacter(con_out, ' ', size, topleft, &nchars); FillConsoleOutputAttribute(con_out, fillchar.Attributes, size, topleft, &nchars); SetConsoleTextAttribute(con_out, curr_attr); /* Move cursor n lines up from where it was. */ csbi.dwCursorPosition.Y -= n; SetConsoleCursorPosition(con_out, csbi.dwCursorPosition); } #endif /* * Move cursor to lower left corner of screen. */ public void lower_left() { #if !MSDOS_COMPILER tputs(sc_lower_left, 1, putchr); #else flush(); _settextposition(sc_height, 1); #endif } /* * Move cursor to left position of current line. */ public void line_left() { #if !MSDOS_COMPILER tputs(sc_return, 1, putchr); #else int row; flush(); #if MSDOS_COMPILER==WIN32C { CONSOLE_SCREEN_BUFFER_INFO scr; GetConsoleScreenBufferInfo(con_out, &scr); row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1; } #else #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC row = wherey(); #else { struct rccoord tpos = _gettextposition(); row = tpos.row; } #endif #endif _settextposition(row, 1); #endif } /* * Check if the console size has changed and reset internals * (in lieu of SIGWINCH for WIN32). */ public void check_winch() { #if MSDOS_COMPILER==WIN32C CONSOLE_SCREEN_BUFFER_INFO scr; COORD size; if (con_out == INVALID_HANDLE_VALUE) return; flush(); GetConsoleScreenBufferInfo(con_out, &scr); size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1; size.X = scr.srWindow.Right - scr.srWindow.Left + 1; if (size.Y != sc_height || size.X != sc_width) { sc_height = size.Y; sc_width = size.X; if (!no_init && con_out_ours == con_out) SetConsoleScreenBufferSize(con_out, size); pos_init(); wscroll = (sc_height + 1) / 2; screen_trashed = 1; } #endif } /* * Goto a specific line on the screen. */ public void goto_line(slinenum) int slinenum; { #if !MSDOS_COMPILER tputs(tgoto(sc_move, 0, slinenum), 1, putchr); #else flush(); _settextposition(slinenum+1, 1); #endif } #if MSDOS_COMPILER==MSOFTC || MSDOS_COMPILER==BORLANDC /* * Create an alternate screen which is all white. * This screen is used to create a "flash" effect, by displaying it * briefly and then switching back to the normal screen. * {{ Yuck! There must be a better way to get a visual bell. }} */ static void create_flash() { #if MSDOS_COMPILER==MSOFTC struct videoconfig w; char *blanks; int row, col; _getvideoconfig(&w); videopages = w.numvideopages; if (videopages < 2) { at_enter(AT_STANDOUT); at_exit(); } else { _setactivepage(1); at_enter(AT_STANDOUT); blanks = (char *) ecalloc(w.numtextcols, sizeof(char)); for (col = 0; col < w.numtextcols; col++) blanks[col] = ' '; for (row = w.numtextrows; row > 0; row--) _outmem(blanks, w.numtextcols); _setactivepage(0); _setvisualpage(0); free(blanks); at_exit(); } #else #if MSDOS_COMPILER==BORLANDC register int n; whitescreen = (unsigned short *) malloc(sc_width * sc_height * sizeof(short)); if (whitescreen == NULL) return; for (n = 0; n < sc_width * sc_height; n++) whitescreen[n] = 0x7020; #else #if MSDOS_COMPILER==WIN32C register int n; whitescreen = (WORD *) malloc(sc_height * sc_width * sizeof(WORD)); if (whitescreen == NULL) return; /* Invert the standard colors. */ for (n = 0; n < sc_width * sc_height; n++) whitescreen[n] = (WORD)((nm_fg_color << 4) | nm_bg_color); #endif #endif #endif flash_created = 1; } #endif /* MSDOS_COMPILER */ /* * Output the "visual bell", if there is one. */ public void vbell() { #if !MSDOS_COMPILER if (*sc_visual_bell == '\0') return; tputs(sc_visual_bell, sc_height, putchr); #else #if MSDOS_COMPILER==DJGPPC ScreenVisualBell(); #else #if MSDOS_COMPILER==MSOFTC /* * Create a flash screen on the second video page. * Switch to that page, then switch back. */ if (!flash_created) create_flash(); if (videopages < 2) return; _setvisualpage(1); delay(100); _setvisualpage(0); #else #if MSDOS_COMPILER==BORLANDC unsigned short *currscreen; /* * Get a copy of the current screen. * Display the flash screen. * Then restore the old screen. */ if (!flash_created) create_flash(); if (whitescreen == NULL) return; currscreen = (unsigned short *) malloc(sc_width * sc_height * sizeof(short)); if (currscreen == NULL) return; gettext(1, 1, sc_width, sc_height, currscreen); puttext(1, 1, sc_width, sc_height, whitescreen); delay(100); puttext(1, 1, sc_width, sc_height, currscreen); free(currscreen); #else #if MSDOS_COMPILER==WIN32C /* paint screen with an inverse color */ clear(); /* leave it displayed for 100 msec. */ Sleep(100); /* restore with a redraw */ repaint(); #endif #endif #endif #endif #endif } /* * Make a noise. */ static void beep() { #if !MSDOS_COMPILER putchr(CONTROL('G')); #else #if MSDOS_COMPILER==WIN32C MessageBeep(0); #else write(STDOUT_FILENO, "\7", 1); #endif #endif } /* * Ring the terminal bell. */ public void bell() { if (quiet == VERY_QUIET) vbell(); else beep(); } /* * Clear the screen. */ public void clear() { #if !MSDOS_COMPILER tputs(sc_clear, sc_height, putchr); #else flush(); #if MSDOS_COMPILER==WIN32C win32_clear(); #else _clearscreen(_GCLEARSCREEN); #endif #endif } /* * Clear from the cursor to the end of the cursor's line. * {{ This must not move the cursor. }} */ public void clear_eol() { #if !MSDOS_COMPILER tputs(sc_eol_clear, 1, putchr); #else #if MSDOS_COMPILER==MSOFTC short top, left; short bot, right; struct rccoord tpos; flush(); /* * Save current state. */ tpos = _gettextposition(); _gettextwindow(&top, &left, &bot, &right); /* * Set a temporary window to the current line, * from the cursor's position to the right edge of the screen. * Then clear that window. */ _settextwindow(tpos.row, tpos.col, tpos.row, sc_width); _clearscreen(_GWINDOW); /* * Restore state. */ _settextwindow(top, left, bot, right); _settextposition(tpos.row, tpos.col); #else #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC flush(); clreol(); #else #if MSDOS_COMPILER==WIN32C DWORD nchars; COORD cpos; CONSOLE_SCREEN_BUFFER_INFO scr; flush(); memset(&scr, 0, sizeof(scr)); GetConsoleScreenBufferInfo(con_out, &scr); cpos.X = scr.dwCursorPosition.X; cpos.Y = scr.dwCursorPosition.Y; curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); FillConsoleOutputAttribute(con_out, curr_attr, scr.dwSize.X - cpos.X, cpos, &nchars); FillConsoleOutputCharacter(con_out, ' ', scr.dwSize.X - cpos.X, cpos, &nchars); #endif #endif #endif #endif } /* * Clear the current line. * Clear the screen if there's off-screen memory below the display. */ static void clear_eol_bot() { #if MSDOS_COMPILER clear_eol(); #else if (below_mem) tputs(sc_eos_clear, 1, putchr); else tputs(sc_eol_clear, 1, putchr); #endif } /* * Clear the bottom line of the display. * Leave the cursor at the beginning of the bottom line. */ public void clear_bot() { /* * If we're in a non-normal attribute mode, temporarily exit * the mode while we do the clear. Some terminals fill the * cleared area with the current attribute. */ if (oldbot) lower_left(); else line_left(); if (attrmode == AT_NORMAL) clear_eol_bot(); else { int saved_attrmode = attrmode; at_exit(); clear_eol_bot(); at_enter(saved_attrmode); } } public void at_enter(attr) int attr; { attr = apply_at_specials(attr); #if !MSDOS_COMPILER /* The one with the most priority is last. */ if (attr & AT_UNDERLINE) tputs(sc_u_in, 1, putchr); if (attr & AT_BOLD) tputs(sc_b_in, 1, putchr); if (attr & AT_BLINK) tputs(sc_bl_in, 1, putchr); if (attr & AT_STANDOUT) tputs(sc_s_in, 1, putchr); #else flush(); /* The one with the most priority is first. */ if (attr & AT_STANDOUT) { SETCOLORS(so_fg_color, so_bg_color); } else if (attr & AT_BLINK) { SETCOLORS(bl_fg_color, bl_bg_color); } else if (attr & AT_BOLD) { SETCOLORS(bo_fg_color, bo_bg_color); } else if (attr & AT_UNDERLINE) { SETCOLORS(ul_fg_color, ul_bg_color); } #endif attrmode = attr; } public void at_exit() { #if !MSDOS_COMPILER /* Undo things in the reverse order we did them. */ if (attrmode & AT_STANDOUT) tputs(sc_s_out, 1, putchr); if (attrmode & AT_BLINK) tputs(sc_bl_out, 1, putchr); if (attrmode & AT_BOLD) tputs(sc_b_out, 1, putchr); if (attrmode & AT_UNDERLINE) tputs(sc_u_out, 1, putchr); #else flush(); SETCOLORS(nm_fg_color, nm_bg_color); #endif attrmode = AT_NORMAL; } public void at_switch(attr) int attr; { int new_attrmode = apply_at_specials(attr); int ignore_modes = AT_ANSI; if ((new_attrmode & ~ignore_modes) != (attrmode & ~ignore_modes)) { at_exit(); at_enter(attr); } } public int is_at_equiv(attr1, attr2) int attr1; int attr2; { attr1 = apply_at_specials(attr1); attr2 = apply_at_specials(attr2); return (attr1 == attr2); } public int apply_at_specials(attr) int attr; { if (attr & AT_BINARY) attr |= binattr; if (attr & AT_HILITE) attr |= AT_STANDOUT; attr &= ~(AT_BINARY|AT_HILITE); return attr; } #if 0 /* No longer used */ /* * Erase the character to the left of the cursor * and move the cursor left. */ public void backspace() { #if !MSDOS_COMPILER /* * Erase the previous character by overstriking with a space. */ tputs(sc_backspace, 1, putchr); putchr(' '); tputs(sc_backspace, 1, putchr); #else #if MSDOS_COMPILER==MSOFTC struct rccoord tpos; flush(); tpos = _gettextposition(); if (tpos.col <= 1) return; _settextposition(tpos.row, tpos.col-1); _outtext(" "); _settextposition(tpos.row, tpos.col-1); #else #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC cputs("\b"); #else #if MSDOS_COMPILER==WIN32C COORD cpos; DWORD cChars; CONSOLE_SCREEN_BUFFER_INFO scr; flush(); GetConsoleScreenBufferInfo(con_out, &scr); cpos = scr.dwCursorPosition; if (cpos.X <= 0) return; cpos.X--; SetConsoleCursorPosition(con_out, cpos); FillConsoleOutputCharacter(con_out, (TCHAR)' ', 1, cpos, &cChars); SetConsoleCursorPosition(con_out, cpos); #endif #endif #endif #endif } #endif /* 0 */ /* * Output a plain backspace, without erasing the previous char. */ public void putbs() { #if !MSDOS_COMPILER tputs(sc_backspace, 1, putchr); #else int row, col; flush(); { #if MSDOS_COMPILER==MSOFTC struct rccoord tpos; tpos = _gettextposition(); row = tpos.row; col = tpos.col; #else #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC row = wherey(); col = wherex(); #else #if MSDOS_COMPILER==WIN32C CONSOLE_SCREEN_BUFFER_INFO scr; GetConsoleScreenBufferInfo(con_out, &scr); row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1; col = scr.dwCursorPosition.X - scr.srWindow.Left + 1; #endif #endif #endif } if (col <= 1) return; _settextposition(row, col-1); #endif /* MSDOS_COMPILER */ } #if MSDOS_COMPILER==WIN32C /* * Determine whether an input character is waiting to be read. */ static int win32_kbhit(tty) HANDLE tty; { INPUT_RECORD ip; DWORD read; if (keyCount > 0) return (TRUE); currentKey.ascii = 0; currentKey.scan = 0; /* * Wait for a real key-down event, but * ignore SHIFT and CONTROL key events. */ do { PeekConsoleInput(tty, &ip, 1, &read); if (read == 0) return (FALSE); ReadConsoleInput(tty, &ip, 1, &read); } while (ip.EventType != KEY_EVENT || ip.Event.KeyEvent.bKeyDown != TRUE || ip.Event.KeyEvent.wVirtualScanCode == 0 || ip.Event.KeyEvent.wVirtualKeyCode == VK_SHIFT || ip.Event.KeyEvent.wVirtualKeyCode == VK_CONTROL || ip.Event.KeyEvent.wVirtualKeyCode == VK_MENU); currentKey.ascii = ip.Event.KeyEvent.uChar.AsciiChar; currentKey.scan = ip.Event.KeyEvent.wVirtualScanCode; keyCount = ip.Event.KeyEvent.wRepeatCount; if (ip.Event.KeyEvent.dwControlKeyState & (LEFT_ALT_PRESSED | RIGHT_ALT_PRESSED)) { switch (currentKey.scan) { case PCK_ALT_E: /* letter 'E' */ currentKey.ascii = 0; break; } } else if (ip.Event.KeyEvent.dwControlKeyState & (LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED)) { switch (currentKey.scan) { case PCK_RIGHT: /* right arrow */ currentKey.scan = PCK_CTL_RIGHT; break; case PCK_LEFT: /* left arrow */ currentKey.scan = PCK_CTL_LEFT; break; case PCK_DELETE: /* delete */ currentKey.scan = PCK_CTL_DELETE; break; } } return (TRUE); } /* * Read a character from the keyboard. */ public char WIN32getch(tty) int tty; { int ascii; if (pending_scancode) { pending_scancode = 0; return ((char)(currentKey.scan & 0x00FF)); } while (win32_kbhit((HANDLE)tty) == FALSE) { Sleep(20); if (ABORT_SIGS()) return ('\003'); continue; } keyCount --; ascii = currentKey.ascii; /* * On PC's, the extended keys return a 2 byte sequence beginning * with '00', so if the ascii code is 00, the next byte will be * the lsb of the scan code. */ pending_scancode = (ascii == 0x00); return ((char)ascii); } #endif #if MSDOS_COMPILER /* */ public void WIN32setcolors(fg, bg) int fg; int bg; { SETCOLORS(fg, bg); } /* */ public void WIN32textout(text, len) char *text; int len; { #if MSDOS_COMPILER==WIN32C DWORD written; WriteConsole(con_out, text, len, &written, NULL); #else char c = text[len]; text[len] = '\0'; cputs(text); text[len] = c; #endif } #endif