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term.c
1699 lines (1535 loc) · 39.5 KB
/
term.c
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/*-
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Christos Zoulas of Cornell University.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $NetBSD: term.c,v 1.56 2009/12/28 21:54:21 christos Exp $
*/
#if !defined(lint) && !defined(SCCSID)
static char sccsid[] = "@(#)term.c 8.2 (Berkeley) 4/30/95";
#endif /* not lint && not SCCSID */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* term.c: Editor/termcap-curses interface
* We have to declare a static variable here, since the
* termcap putchar routine does not take an argument!
*/
#include <stdio.h>
#include <signal.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <termcap.h>
#include <curses.h>
#include <ncurses.h>
#include <term.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include "el.h"
/*
* IMPORTANT NOTE: these routines are allowed to look at the current screen
* and the current possition assuming that it is correct. If this is not
* true, then the update will be WRONG! This is (should be) a valid
* assumption...
*/
#define TC_BUFSIZE 2048
#define GoodStr(a) (el->el_term.t_str[a] != NULL && \
el->el_term.t_str[a][0] != '\0')
#define Str(a) el->el_term.t_str[a]
#define Val(a) el->el_term.t_val[a]
#ifdef notdef
private const struct {
const char *b_name;
int b_rate;
} baud_rate[] = {
#ifdef B0
{ "0", B0 },
#endif
#ifdef B50
{ "50", B50 },
#endif
#ifdef B75
{ "75", B75 },
#endif
#ifdef B110
{ "110", B110 },
#endif
#ifdef B134
{ "134", B134 },
#endif
#ifdef B150
{ "150", B150 },
#endif
#ifdef B200
{ "200", B200 },
#endif
#ifdef B300
{ "300", B300 },
#endif
#ifdef B600
{ "600", B600 },
#endif
#ifdef B900
{ "900", B900 },
#endif
#ifdef B1200
{ "1200", B1200 },
#endif
#ifdef B1800
{ "1800", B1800 },
#endif
#ifdef B2400
{ "2400", B2400 },
#endif
#ifdef B3600
{ "3600", B3600 },
#endif
#ifdef B4800
{ "4800", B4800 },
#endif
#ifdef B7200
{ "7200", B7200 },
#endif
#ifdef B9600
{ "9600", B9600 },
#endif
#ifdef EXTA
{ "19200", EXTA },
#endif
#ifdef B19200
{ "19200", B19200 },
#endif
#ifdef EXTB
{ "38400", EXTB },
#endif
#ifdef B38400
{ "38400", B38400 },
#endif
{ NULL, 0 }
};
#endif
private const struct termcapstr {
const char *name;
const char *long_name;
} tstr[] = {
#define T_al 0
{ "al", "add new blank line" },
#define T_bl 1
{ "bl", "audible bell" },
#define T_cd 2
{ "cd", "clear to bottom" },
#define T_ce 3
{ "ce", "clear to end of line" },
#define T_ch 4
{ "ch", "cursor to horiz pos" },
#define T_cl 5
{ "cl", "clear screen" },
#define T_dc 6
{ "dc", "delete a character" },
#define T_dl 7
{ "dl", "delete a line" },
#define T_dm 8
{ "dm", "start delete mode" },
#define T_ed 9
{ "ed", "end delete mode" },
#define T_ei 10
{ "ei", "end insert mode" },
#define T_fs 11
{ "fs", "cursor from status line" },
#define T_ho 12
{ "ho", "home cursor" },
#define T_ic 13
{ "ic", "insert character" },
#define T_im 14
{ "im", "start insert mode" },
#define T_ip 15
{ "ip", "insert padding" },
#define T_kd 16
{ "kd", "sends cursor down" },
#define T_kl 17
{ "kl", "sends cursor left" },
#define T_kr 18
{ "kr", "sends cursor right" },
#define T_ku 19
{ "ku", "sends cursor up" },
#define T_md 20
{ "md", "begin bold" },
#define T_me 21
{ "me", "end attributes" },
#define T_nd 22
{ "nd", "non destructive space" },
#define T_se 23
{ "se", "end standout" },
#define T_so 24
{ "so", "begin standout" },
#define T_ts 25
{ "ts", "cursor to status line" },
#define T_up 26
{ "up", "cursor up one" },
#define T_us 27
{ "us", "begin underline" },
#define T_ue 28
{ "ue", "end underline" },
#define T_vb 29
{ "vb", "visible bell" },
#define T_DC 30
{ "DC", "delete multiple chars" },
#define T_DO 31
{ "DO", "cursor down multiple" },
#define T_IC 32
{ "IC", "insert multiple chars" },
#define T_LE 33
{ "LE", "cursor left multiple" },
#define T_RI 34
{ "RI", "cursor right multiple" },
#define T_UP 35
{ "UP", "cursor up multiple" },
#define T_kh 36
{ "kh", "send cursor home" },
#define T_at7 37
{ "@7", "send cursor end" },
#define T_kD 38
{ "kD", "send cursor delete" },
#define T_str 39
{ NULL, NULL }
};
private const struct termcapval {
const char *name;
const char *long_name;
} tval[] = {
#define T_am 0
{ "am", "has automatic margins" },
#define T_pt 1
{ "pt", "has physical tabs" },
#define T_li 2
{ "li", "Number of lines" },
#define T_co 3
{ "co", "Number of columns" },
#define T_km 4
{ "km", "Has meta key" },
#define T_xt 5
{ "xt", "Tab chars destructive" },
#define T_xn 6
{ "xn", "newline ignored at right margin" },
#define T_MT 7
{ "MT", "Has meta key" }, /* XXX? */
#define T_val 8
{ NULL, NULL, }
};
/* do two or more of the attributes use me */
private void term_setflags(EditLine *);
private int term_rebuffer_display(EditLine *);
private void term_free_display(EditLine *);
private int term_alloc_display(EditLine *);
private void term_alloc(EditLine *, const struct termcapstr *, const char *);
private void term_init_arrow(EditLine *);
private void term_reset_arrow(EditLine *);
private int term_putc(int);
private void term_tputs(EditLine *, const char *, int);
#ifdef _REENTRANT
private pthread_mutex_t term_mutex = PTHREAD_MUTEX_INITIALIZER;
#endif
private FILE *term_outfile = NULL;
/* term_setflags():
* Set the terminal capability flags
*/
private void
term_setflags(EditLine *el)
{
EL_FLAGS = 0;
if (el->el_tty.t_tabs)
EL_FLAGS |= (Val(T_pt) && !Val(T_xt)) ? TERM_CAN_TAB : 0;
EL_FLAGS |= (Val(T_km) || Val(T_MT)) ? TERM_HAS_META : 0;
EL_FLAGS |= GoodStr(T_ce) ? TERM_CAN_CEOL : 0;
EL_FLAGS |= (GoodStr(T_dc) || GoodStr(T_DC)) ? TERM_CAN_DELETE : 0;
EL_FLAGS |= (GoodStr(T_im) || GoodStr(T_ic) || GoodStr(T_IC)) ?
TERM_CAN_INSERT : 0;
EL_FLAGS |= (GoodStr(T_up) || GoodStr(T_UP)) ? TERM_CAN_UP : 0;
EL_FLAGS |= Val(T_am) ? TERM_HAS_AUTO_MARGINS : 0;
EL_FLAGS |= Val(T_xn) ? TERM_HAS_MAGIC_MARGINS : 0;
if (GoodStr(T_me) && GoodStr(T_ue))
EL_FLAGS |= (strcmp(Str(T_me), Str(T_ue)) == 0) ?
TERM_CAN_ME : 0;
else
EL_FLAGS &= ~TERM_CAN_ME;
if (GoodStr(T_me) && GoodStr(T_se))
EL_FLAGS |= (strcmp(Str(T_me), Str(T_se)) == 0) ?
TERM_CAN_ME : 0;
#ifdef DEBUG_SCREEN
if (!EL_CAN_UP) {
(void) fprintf(el->el_errfile,
"WARNING: Your terminal cannot move up.\n");
(void) fprintf(el->el_errfile,
"Editing may be odd for long lines.\n");
}
if (!EL_CAN_CEOL)
(void) fprintf(el->el_errfile, "no clear EOL capability.\n");
if (!EL_CAN_DELETE)
(void) fprintf(el->el_errfile, "no delete char capability.\n");
if (!EL_CAN_INSERT)
(void) fprintf(el->el_errfile, "no insert char capability.\n");
#endif /* DEBUG_SCREEN */
}
/* term_init():
* Initialize the terminal stuff
*/
protected int
term_init(EditLine *el)
{
el->el_term.t_buf = (char *) el_malloc(TC_BUFSIZE);
if (el->el_term.t_buf == NULL)
return (-1);
el->el_term.t_cap = (char *) el_malloc(TC_BUFSIZE);
if (el->el_term.t_cap == NULL)
return (-1);
el->el_term.t_fkey = (fkey_t *) el_malloc(A_K_NKEYS * sizeof(fkey_t));
if (el->el_term.t_fkey == NULL)
return (-1);
el->el_term.t_loc = 0;
el->el_term.t_str = (char **) el_malloc(T_str * sizeof(char *));
if (el->el_term.t_str == NULL)
return (-1);
(void) memset(el->el_term.t_str, 0, T_str * sizeof(char *));
el->el_term.t_val = (int *) el_malloc(T_val * sizeof(int));
if (el->el_term.t_val == NULL)
return (-1);
(void) memset(el->el_term.t_val, 0, T_val * sizeof(int));
(void) term_set(el, NULL);
term_init_arrow(el);
return (0);
}
/* term_end():
* Clean up the terminal stuff
*/
protected void
term_end(EditLine *el)
{
el_free((ptr_t) el->el_term.t_buf);
el->el_term.t_buf = NULL;
el_free((ptr_t) el->el_term.t_cap);
el->el_term.t_cap = NULL;
el->el_term.t_loc = 0;
el_free((ptr_t) el->el_term.t_str);
el->el_term.t_str = NULL;
el_free((ptr_t) el->el_term.t_val);
el->el_term.t_val = NULL;
el_free((ptr_t) el->el_term.t_fkey);
el->el_term.t_fkey = NULL;
term_free_display(el);
}
/* term_alloc():
* Maintain a string pool for termcap strings
*/
private void
term_alloc(EditLine *el, const struct termcapstr *t, const char *cap)
{
char termbuf[TC_BUFSIZE];
size_t tlen, clen;
char **tlist = el->el_term.t_str;
char **tmp, **str = &tlist[t - tstr];
if (cap == NULL || *cap == '\0') {
*str = NULL;
return;
} else
clen = strlen(cap);
tlen = *str == NULL ? 0 : strlen(*str);
/*
* New string is shorter; no need to allocate space
*/
if (clen <= tlen) {
if (*str)
(void) strcpy(*str, cap); /* XXX strcpy is safe */
return;
}
/*
* New string is longer; see if we have enough space to append
*/
if (el->el_term.t_loc + 3 < TC_BUFSIZE) {
/* XXX strcpy is safe */
(void) strcpy(*str = &el->el_term.t_buf[el->el_term.t_loc],
cap);
el->el_term.t_loc += (int)clen + 1; /* one for \0 */
return;
}
/*
* Compact our buffer; no need to check compaction, cause we know it
* fits...
*/
tlen = 0;
for (tmp = tlist; tmp < &tlist[T_str]; tmp++)
if (*tmp != NULL && *tmp != '\0' && *tmp != *str) {
char *ptr;
for (ptr = *tmp; *ptr != '\0'; termbuf[tlen++] = *ptr++)
continue;
termbuf[tlen++] = '\0';
}
memcpy(el->el_term.t_buf, termbuf, TC_BUFSIZE);
el->el_term.t_loc = (int)tlen;
if (el->el_term.t_loc + 3 >= TC_BUFSIZE) {
(void) fprintf(el->el_errfile,
"Out of termcap string space.\n");
return;
}
/* XXX strcpy is safe */
(void) strcpy(*str = &el->el_term.t_buf[el->el_term.t_loc], cap);
el->el_term.t_loc += (int)clen + 1; /* one for \0 */
return;
}
/* term_rebuffer_display():
* Rebuffer the display after the screen changed size
*/
private int
term_rebuffer_display(EditLine *el)
{
coord_t *c = &el->el_term.t_size;
term_free_display(el);
c->h = Val(T_co);
c->v = Val(T_li);
if (term_alloc_display(el) == -1)
return (-1);
return (0);
}
/* term_alloc_display():
* Allocate a new display.
*/
private int
term_alloc_display(EditLine *el)
{
int i;
char **b;
coord_t *c = &el->el_term.t_size;
b = (char **) el_malloc((size_t) (sizeof(char *) * (c->v + 1)));
if (b == NULL)
return (-1);
for (i = 0; i < c->v; i++) {
b[i] = (char *) el_malloc((size_t) (sizeof(char) * (c->h + 1)));
if (b[i] == NULL) {
while (--i >= 0)
el_free((ptr_t) b[i]);
el_free((ptr_t) b);
return (-1);
}
}
b[c->v] = NULL;
el->el_display = b;
b = (char **) el_malloc((size_t) (sizeof(char *) * (c->v + 1)));
if (b == NULL)
return (-1);
for (i = 0; i < c->v; i++) {
b[i] = (char *) el_malloc((size_t) (sizeof(char) * (c->h + 1)));
if (b[i] == NULL) {
while (--i >= 0)
el_free((ptr_t) b[i]);
el_free((ptr_t) b);
return (-1);
}
}
b[c->v] = NULL;
el->el_vdisplay = b;
return (0);
}
/* term_free_display():
* Free the display buffers
*/
private void
term_free_display(EditLine *el)
{
char **b;
char **bufp;
b = el->el_display;
el->el_display = NULL;
if (b != NULL) {
for (bufp = b; *bufp != NULL; bufp++)
el_free((ptr_t) * bufp);
el_free((ptr_t) b);
}
b = el->el_vdisplay;
el->el_vdisplay = NULL;
if (b != NULL) {
for (bufp = b; *bufp != NULL; bufp++)
el_free((ptr_t) * bufp);
el_free((ptr_t) b);
}
}
/* term_move_to_line():
* move to line <where> (first line == 0)
* as efficiently as possible
*/
protected void
term_move_to_line(EditLine *el, int where)
{
int del;
if (where == el->el_cursor.v)
return;
if (where > el->el_term.t_size.v) {
#ifdef DEBUG_SCREEN
(void) fprintf(el->el_errfile,
"term_move_to_line: where is ridiculous: %d\r\n", where);
#endif /* DEBUG_SCREEN */
return;
}
if ((del = where - el->el_cursor.v) > 0) {
while (del > 0) {
if (EL_HAS_AUTO_MARGINS &&
el->el_display[el->el_cursor.v][0] != '\0') {
/* move without newline */
term_move_to_char(el, el->el_term.t_size.h - 1);
term_overwrite(el, &el->el_display
[el->el_cursor.v][el->el_cursor.h],
(size_t)(el->el_term.t_size.h -
el->el_cursor.h));
/* updates Cursor */
del--;
} else {
if ((del > 1) && GoodStr(T_DO)) {
term_tputs(el, tgoto(Str(T_DO), del,
del), del);
del = 0;
} else {
for (; del > 0; del--)
term__putc(el, '\n');
/* because the \n will become \r\n */
el->el_cursor.h = 0;
}
}
}
} else { /* del < 0 */
if (GoodStr(T_UP) && (-del > 1 || !GoodStr(T_up)))
term_tputs(el, tgoto(Str(T_UP), -del, -del), -del);
else {
if (GoodStr(T_up))
for (; del < 0; del++)
term_tputs(el, Str(T_up), 1);
}
}
el->el_cursor.v = where;/* now where is here */
}
/* term_move_to_char():
* Move to the character position specified
*/
protected void
term_move_to_char(EditLine *el, int where)
{
int del, i;
mc_again:
if (where == el->el_cursor.h)
return;
if (where > el->el_term.t_size.h) {
#ifdef DEBUG_SCREEN
(void) fprintf(el->el_errfile,
"term_move_to_char: where is riduculous: %d\r\n", where);
#endif /* DEBUG_SCREEN */
return;
}
if (!where) { /* if where is first column */
term__putc(el, '\r'); /* do a CR */
el->el_cursor.h = 0;
return;
}
del = where - el->el_cursor.h;
if ((del < -4 || del > 4) && GoodStr(T_ch))
/* go there directly */
term_tputs(el, tgoto(Str(T_ch), where, where), where);
else {
if (del > 0) { /* moving forward */
if ((del > 4) && GoodStr(T_RI))
term_tputs(el, tgoto(Str(T_RI), del, del), del);
else {
/* if I can do tabs, use them */
if (EL_CAN_TAB) {
if ((el->el_cursor.h & 0370) !=
(where & ~0x7)) {
/* if not within tab stop */
for (i =
(el->el_cursor.h & 0370);
i < (where & ~0x7);
i += 8)
term__putc(el, '\t');
/* then tab over */
el->el_cursor.h = where & ~0x7;
}
}
/*
* it's usually cheaper to just write the
* chars, so we do.
*/
/*
* NOTE THAT term_overwrite() WILL CHANGE
* el->el_cursor.h!!!
*/
term_overwrite(el, &el->el_display[
el->el_cursor.v][el->el_cursor.h],
(size_t)(where - el->el_cursor.h));
}
} else { /* del < 0 := moving backward */
if ((-del > 4) && GoodStr(T_LE))
term_tputs(el, tgoto(Str(T_LE), -del, -del),
-del);
else { /* can't go directly there */
/*
* if the "cost" is greater than the "cost"
* from col 0
*/
if (EL_CAN_TAB ?
((unsigned int)-del >
(((unsigned int) where >> 3) +
(where & 07)))
: (-del > where)) {
term__putc(el, '\r'); /* do a CR */
el->el_cursor.h = 0;
goto mc_again; /* and try again */
}
for (i = 0; i < -del; i++)
term__putc(el, '\b');
}
}
}
el->el_cursor.h = where; /* now where is here */
}
/* term_overwrite():
* Overstrike num characters
*/
protected void
term_overwrite(EditLine *el, const char *cp, size_t n)
{
if (n == 0)
return;
if (n > (size_t)el->el_term.t_size.h) {
#ifdef DEBUG_SCREEN
(void) fprintf(el->el_errfile,
"term_overwrite: n is riduculous: %d\r\n", n);
#endif /* DEBUG_SCREEN */
return;
}
do {
term__putc(el, *cp++);
el->el_cursor.h++;
} while (--n);
if (el->el_cursor.h >= el->el_term.t_size.h) { /* wrap? */
if (EL_HAS_AUTO_MARGINS) { /* yes */
el->el_cursor.h = 0;
el->el_cursor.v++;
if (EL_HAS_MAGIC_MARGINS) {
/* force the wrap to avoid the "magic"
* situation */
char c;
if ((c = el->el_display[el->el_cursor.v][el->el_cursor.h])
!= '\0')
term_overwrite(el, &c, 1);
else {
term__putc(el, ' ');
el->el_cursor.h = 1;
}
}
} else /* no wrap, but cursor stays on screen */
el->el_cursor.h = el->el_term.t_size.h - 1;
}
}
/* term_deletechars():
* Delete num characters
*/
protected void
term_deletechars(EditLine *el, int num)
{
if (num <= 0)
return;
if (!EL_CAN_DELETE) {
#ifdef DEBUG_EDIT
(void) fprintf(el->el_errfile, " ERROR: cannot delete \n");
#endif /* DEBUG_EDIT */
return;
}
if (num > el->el_term.t_size.h) {
#ifdef DEBUG_SCREEN
(void) fprintf(el->el_errfile,
"term_deletechars: num is riduculous: %d\r\n", num);
#endif /* DEBUG_SCREEN */
return;
}
if (GoodStr(T_DC)) /* if I have multiple delete */
if ((num > 1) || !GoodStr(T_dc)) { /* if dc would be more
* expen. */
term_tputs(el, tgoto(Str(T_DC), num, num), num);
return;
}
if (GoodStr(T_dm)) /* if I have delete mode */
term_tputs(el, Str(T_dm), 1);
if (GoodStr(T_dc)) /* else do one at a time */
while (num--)
term_tputs(el, Str(T_dc), 1);
if (GoodStr(T_ed)) /* if I have delete mode */
term_tputs(el, Str(T_ed), 1);
}
/* term_insertwrite():
* Puts terminal in insert character mode or inserts num
* characters in the line
*/
protected void
term_insertwrite(EditLine *el, char *cp, int num)
{
if (num <= 0)
return;
if (!EL_CAN_INSERT) {
#ifdef DEBUG_EDIT
(void) fprintf(el->el_errfile, " ERROR: cannot insert \n");
#endif /* DEBUG_EDIT */
return;
}
if (num > el->el_term.t_size.h) {
#ifdef DEBUG_SCREEN
(void) fprintf(el->el_errfile,
"StartInsert: num is riduculous: %d\r\n", num);
#endif /* DEBUG_SCREEN */
return;
}
if (GoodStr(T_IC)) /* if I have multiple insert */
if ((num > 1) || !GoodStr(T_ic)) {
/* if ic would be more expensive */
term_tputs(el, tgoto(Str(T_IC), num, num), num);
term_overwrite(el, cp, (size_t)num);
/* this updates el_cursor.h */
return;
}
if (GoodStr(T_im) && GoodStr(T_ei)) { /* if I have insert mode */
term_tputs(el, Str(T_im), 1);
el->el_cursor.h += num;
do
term__putc(el, *cp++);
while (--num);
if (GoodStr(T_ip)) /* have to make num chars insert */
term_tputs(el, Str(T_ip), 1);
term_tputs(el, Str(T_ei), 1);
return;
}
do {
if (GoodStr(T_ic)) /* have to make num chars insert */
term_tputs(el, Str(T_ic), 1);
term__putc(el, *cp++);
el->el_cursor.h++;
if (GoodStr(T_ip)) /* have to make num chars insert */
term_tputs(el, Str(T_ip), 1);
/* pad the inserted char */
} while (--num);
}
/* term_clear_EOL():
* clear to end of line. There are num characters to clear
*/
protected void
term_clear_EOL(EditLine *el, int num)
{
int i;
if (EL_CAN_CEOL && GoodStr(T_ce))
term_tputs(el, Str(T_ce), 1);
else {
for (i = 0; i < num; i++)
term__putc(el, ' ');
el->el_cursor.h += num; /* have written num spaces */
}
}
/* term_clear_screen():
* Clear the screen
*/
protected void
term_clear_screen(EditLine *el)
{ /* clear the whole screen and home */
if (GoodStr(T_cl))
/* send the clear screen code */
term_tputs(el, Str(T_cl), Val(T_li));
else if (GoodStr(T_ho) && GoodStr(T_cd)) {
term_tputs(el, Str(T_ho), Val(T_li)); /* home */
/* clear to bottom of screen */
term_tputs(el, Str(T_cd), Val(T_li));
} else {
term__putc(el, '\r');
term__putc(el, '\n');
}
}
/* term_beep():
* Beep the way the terminal wants us
*/
protected void
term_beep(EditLine *el)
{
if (GoodStr(T_bl))
/* what termcap says we should use */
term_tputs(el, Str(T_bl), 1);
else
term__putc(el, '\007'); /* an ASCII bell; ^G */
}
#ifdef notdef
/* term_clear_to_bottom():
* Clear to the bottom of the screen
*/
protected void
term_clear_to_bottom(EditLine *el)
{
if (GoodStr(T_cd))
term_tputs(el, Str(T_cd), Val(T_li));
else if (GoodStr(T_ce))
term_tputs(el, Str(T_ce), Val(T_li));
}
#endif
protected void
term_get(EditLine *el, const char **term)
{
*term = el->el_term.t_name;
}
/* term_set():
* Read in the terminal capabilities from the requested terminal
*/
protected int
term_set(EditLine *el, const char *term)
{
int i;
char buf[TC_BUFSIZE];
char *area;
const struct termcapstr *t;
sigset_t oset, nset;
int lins, cols;
(void) sigemptyset(&nset);
(void) sigaddset(&nset, SIGWINCH);
(void) sigprocmask(SIG_BLOCK, &nset, &oset);
area = buf;
if (term == NULL)
term = getenv("TERM");
if (!term || !term[0])
term = "dumb";
if (strcmp(term, "emacs") == 0)
el->el_flags |= EDIT_DISABLED;
memset(el->el_term.t_cap, 0, TC_BUFSIZE);
i = tgetent(el->el_term.t_cap, term);
if (i <= 0) {
if (i == -1)
(void) fprintf(el->el_errfile,
"Cannot read termcap database;\n");
else if (i == 0)
(void) fprintf(el->el_errfile,
"No entry for terminal type \"%s\";\n", term);
(void) fprintf(el->el_errfile,
"using dumb terminal settings.\n");
Val(T_co) = 80; /* do a dumb terminal */
Val(T_pt) = Val(T_km) = Val(T_li) = 0;
Val(T_xt) = Val(T_MT);
for (t = tstr; t->name != NULL; t++)
term_alloc(el, t, NULL);
} else {
/* auto/magic margins */
Val(T_am) = tgetflag("am");
Val(T_xn) = tgetflag("xn");
/* Can we tab */
Val(T_pt) = tgetflag("pt");
Val(T_xt) = tgetflag("xt");
/* do we have a meta? */
Val(T_km) = tgetflag("km");
Val(T_MT) = tgetflag("MT");
/* Get the size */
Val(T_co) = tgetnum("co");
Val(T_li) = tgetnum("li");
for (t = tstr; t->name != NULL; t++) {
/* XXX: some systems' tgetstr needs non const */
term_alloc(el, t, tgetstr(strchr(t->name, *t->name),
&area));
}
}
if (Val(T_co) < 2)
Val(T_co) = 80; /* just in case */
if (Val(T_li) < 1)
Val(T_li) = 24;
el->el_term.t_size.v = Val(T_co);
el->el_term.t_size.h = Val(T_li);
term_setflags(el);
/* get the correct window size */
(void) term_get_size(el, &lins, &cols);
if (term_change_size(el, lins, cols) == -1)
return (-1);
(void) sigprocmask(SIG_SETMASK, &oset, NULL);
term_bind_arrow(el);
el->el_term.t_name = term;
return (i <= 0 ? -1 : 0);
}
/* term_get_size():
* Return the new window size in lines and cols, and
* true if the size was changed.
*/
protected int
term_get_size(EditLine *el, int *lins, int *cols)
{
*cols = Val(T_co);
*lins = Val(T_li);
#ifdef TIOCGWINSZ
{
struct winsize ws;
if (ioctl(el->el_infd, TIOCGWINSZ, (ioctl_t) & ws) != -1) {
if (ws.ws_col)
*cols = ws.ws_col;
if (ws.ws_row)
*lins = ws.ws_row;
}
}
#endif
#ifdef TIOCGSIZE
{
struct ttysize ts;
if (ioctl(el->el_infd, TIOCGSIZE, (ioctl_t) & ts) != -1) {
if (ts.ts_cols)
*cols = ts.ts_cols;