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b8ba871bd9
files, curses, db, regex etc that we already have). The other glue will follow shortly. Obtained from: Keith Bostic <bostic@bostic.com>
866 lines
24 KiB
C
866 lines
24 KiB
C
/*-
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* Copyright (c) 1991, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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* Copyright (c) 1991, 1993, 1994, 1995, 1996
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* Keith Bostic. All rights reserved.
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*
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* See the LICENSE file for redistribution information.
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*/
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#include "config.h"
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#ifndef lint
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static const char sccsid[] = "@(#)key.c 10.33 (Berkeley) 9/24/96";
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/queue.h>
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#include <sys/time.h>
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#include <bitstring.h>
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#include <ctype.h>
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#include <errno.h>
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#include <limits.h>
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#include <locale.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "common.h"
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#include "../vi/vi.h"
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static int v_event_append __P((SCR *, EVENT *));
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static int v_event_grow __P((SCR *, int));
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static int v_key_cmp __P((const void *, const void *));
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static void v_keyval __P((SCR *, int, scr_keyval_t));
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static void v_sync __P((SCR *, int));
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/*
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* !!!
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* Historic vi always used:
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*
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* ^D: autoindent deletion
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* ^H: last character deletion
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* ^W: last word deletion
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* ^Q: quote the next character (if not used in flow control).
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* ^V: quote the next character
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*
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* regardless of the user's choices for these characters. The user's erase
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* and kill characters worked in addition to these characters. Nvi wires
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* down the above characters, but in addition permits the VEOF, VERASE, VKILL
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* and VWERASE characters described by the user's termios structure.
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*
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* Ex was not consistent with this scheme, as it historically ran in tty
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* cooked mode. This meant that the scroll command and autoindent erase
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* characters were mapped to the user's EOF character, and the character
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* and word deletion characters were the user's tty character and word
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* deletion characters. This implementation makes it all consistent, as
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* described above for vi.
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*
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* !!!
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* This means that all screens share a special key set.
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*/
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KEYLIST keylist[] = {
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{K_BACKSLASH, '\\'}, /* \ */
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{K_CARAT, '^'}, /* ^ */
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{K_CNTRLD, '\004'}, /* ^D */
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{K_CNTRLR, '\022'}, /* ^R */
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{K_CNTRLT, '\024'}, /* ^T */
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{K_CNTRLZ, '\032'}, /* ^Z */
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{K_COLON, ':'}, /* : */
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{K_CR, '\r'}, /* \r */
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{K_ESCAPE, '\033'}, /* ^[ */
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{K_FORMFEED, '\f'}, /* \f */
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{K_HEXCHAR, '\030'}, /* ^X */
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{K_NL, '\n'}, /* \n */
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{K_RIGHTBRACE, '}'}, /* } */
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{K_RIGHTPAREN, ')'}, /* ) */
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{K_TAB, '\t'}, /* \t */
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{K_VERASE, '\b'}, /* \b */
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{K_VKILL, '\025'}, /* ^U */
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{K_VLNEXT, '\021'}, /* ^Q */
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{K_VLNEXT, '\026'}, /* ^V */
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{K_VWERASE, '\027'}, /* ^W */
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{K_ZERO, '0'}, /* 0 */
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#define ADDITIONAL_CHARACTERS 4
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{K_NOTUSED, 0}, /* VEOF, VERASE, VKILL, VWERASE */
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{K_NOTUSED, 0},
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{K_NOTUSED, 0},
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{K_NOTUSED, 0},
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};
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static int nkeylist =
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(sizeof(keylist) / sizeof(keylist[0])) - ADDITIONAL_CHARACTERS;
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/*
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* v_key_init --
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* Initialize the special key lookup table.
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*
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* PUBLIC: int v_key_init __P((SCR *));
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*/
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int
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v_key_init(sp)
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SCR *sp;
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{
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CHAR_T ch;
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GS *gp;
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KEYLIST *kp;
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int cnt;
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gp = sp->gp;
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/*
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* XXX
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* 8-bit only, for now. Recompilation should get you any 8-bit
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* character set, as long as nul isn't a character.
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*/
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(void)setlocale(LC_ALL, "");
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#if __linux__
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/*
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* In libc 4.5.26, setlocale(LC_ALL, ""), doesn't setup the table
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* for ctype(3c) correctly. This bug is fixed in libc 4.6.x.
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*
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* This code works around this problem for libc 4.5.x users.
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* Note that this code is harmless if you're using libc 4.6.x.
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*/
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(void)setlocale(LC_CTYPE, "");
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#endif
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v_key_ilookup(sp);
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v_keyval(sp, K_CNTRLD, KEY_VEOF);
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v_keyval(sp, K_VERASE, KEY_VERASE);
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v_keyval(sp, K_VKILL, KEY_VKILL);
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v_keyval(sp, K_VWERASE, KEY_VWERASE);
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/* Sort the special key list. */
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qsort(keylist, nkeylist, sizeof(keylist[0]), v_key_cmp);
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/* Initialize the fast lookup table. */
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for (gp->max_special = 0, kp = keylist, cnt = nkeylist; cnt--; ++kp) {
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if (gp->max_special < kp->value)
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gp->max_special = kp->value;
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if (kp->ch <= MAX_FAST_KEY)
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gp->special_key[kp->ch] = kp->value;
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}
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/* Find a non-printable character to use as a message separator. */
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for (ch = 1; ch <= MAX_CHAR_T; ++ch)
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if (!isprint(ch)) {
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gp->noprint = ch;
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break;
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}
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if (ch != gp->noprint) {
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msgq(sp, M_ERR, "079|No non-printable character found");
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return (1);
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}
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return (0);
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}
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/*
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* v_keyval --
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* Set key values.
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*
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* We've left some open slots in the keylist table, and if these values exist,
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* we put them into place. Note, they may reset (or duplicate) values already
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* in the table, so we check for that first.
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*/
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static void
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v_keyval(sp, val, name)
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SCR *sp;
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int val;
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scr_keyval_t name;
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{
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KEYLIST *kp;
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CHAR_T ch;
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int dne;
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/* Get the key's value from the screen. */
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if (sp->gp->scr_keyval(sp, name, &ch, &dne))
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return;
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if (dne)
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return;
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/* Check for duplication. */
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for (kp = keylist; kp->value != K_NOTUSED; ++kp)
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if (kp->ch == ch) {
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kp->value = val;
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return;
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}
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/* Add a new entry. */
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if (kp->value == K_NOTUSED) {
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keylist[nkeylist].ch = ch;
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keylist[nkeylist].value = val;
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++nkeylist;
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}
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}
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/*
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* v_key_ilookup --
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* Build the fast-lookup key display array.
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*
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* PUBLIC: void v_key_ilookup __P((SCR *));
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*/
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void
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v_key_ilookup(sp)
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SCR *sp;
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{
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CHAR_T ch, *p, *t;
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GS *gp;
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size_t len;
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for (gp = sp->gp, ch = 0; ch <= MAX_FAST_KEY; ++ch)
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for (p = gp->cname[ch].name, t = v_key_name(sp, ch),
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len = gp->cname[ch].len = sp->clen; len--;)
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*p++ = *t++;
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}
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/*
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* v_key_len --
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* Return the length of the string that will display the key.
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* This routine is the backup for the KEY_LEN() macro.
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*
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* PUBLIC: size_t v_key_len __P((SCR *, ARG_CHAR_T));
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*/
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size_t
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v_key_len(sp, ch)
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SCR *sp;
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ARG_CHAR_T ch;
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{
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(void)v_key_name(sp, ch);
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return (sp->clen);
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}
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/*
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* v_key_name --
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* Return the string that will display the key. This routine
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* is the backup for the KEY_NAME() macro.
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*
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* PUBLIC: CHAR_T *v_key_name __P((SCR *, ARG_CHAR_T));
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*/
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CHAR_T *
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v_key_name(sp, ach)
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SCR *sp;
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ARG_CHAR_T ach;
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{
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static const CHAR_T hexdigit[] = "0123456789abcdef";
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static const CHAR_T octdigit[] = "01234567";
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CHAR_T ch, *chp, mask;
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size_t len;
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int cnt, shift;
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ch = ach;
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/* See if the character was explicitly declared printable or not. */
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if ((chp = O_STR(sp, O_PRINT)) != NULL)
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for (; *chp != '\0'; ++chp)
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if (*chp == ch)
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goto pr;
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if ((chp = O_STR(sp, O_NOPRINT)) != NULL)
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for (; *chp != '\0'; ++chp)
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if (*chp == ch)
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goto nopr;
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/*
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* Historical (ARPA standard) mappings. Printable characters are left
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* alone. Control characters less than 0x20 are represented as '^'
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* followed by the character offset from the '@' character in the ASCII
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* character set. Del (0x7f) is represented as '^' followed by '?'.
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*
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* XXX
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* The following code depends on the current locale being identical to
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* the ASCII map from 0x40 to 0x5f (since 0x1f + 0x40 == 0x5f). I'm
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* told that this is a reasonable assumption...
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*
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* XXX
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* This code will only work with CHAR_T's that are multiples of 8-bit
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* bytes.
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*
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* XXX
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* NB: There's an assumption here that all printable characters take
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* up a single column on the screen. This is not always correct.
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*/
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if (isprint(ch)) {
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pr: sp->cname[0] = ch;
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len = 1;
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goto done;
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}
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nopr: if (iscntrl(ch) && (ch < 0x20 || ch == 0x7f)) {
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sp->cname[0] = '^';
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sp->cname[1] = ch == 0x7f ? '?' : '@' + ch;
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len = 2;
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} else if (O_ISSET(sp, O_OCTAL)) {
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#define BITS (sizeof(CHAR_T) * 8)
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#define SHIFT (BITS - BITS % 3)
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#define TOPMASK (BITS % 3 == 2 ? 3 : 1) << (BITS - BITS % 3)
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sp->cname[0] = '\\';
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sp->cname[1] = octdigit[(ch & TOPMASK) >> SHIFT];
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shift = SHIFT - 3;
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for (len = 2, mask = 7 << (SHIFT - 3),
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cnt = BITS / 3; cnt-- > 0; mask >>= 3, shift -= 3)
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sp->cname[len++] = octdigit[(ch & mask) >> shift];
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} else {
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sp->cname[0] = '\\';
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sp->cname[1] = 'x';
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for (len = 2, chp = (u_int8_t *)&ch,
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cnt = sizeof(CHAR_T); cnt-- > 0; ++chp) {
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sp->cname[len++] = hexdigit[(*chp & 0xf0) >> 4];
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sp->cname[len++] = hexdigit[*chp & 0x0f];
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}
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}
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done: sp->cname[sp->clen = len] = '\0';
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return (sp->cname);
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}
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/*
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* v_key_val --
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* Fill in the value for a key. This routine is the backup
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* for the KEY_VAL() macro.
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*
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* PUBLIC: int v_key_val __P((SCR *, ARG_CHAR_T));
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*/
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int
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v_key_val(sp, ch)
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SCR *sp;
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ARG_CHAR_T ch;
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{
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KEYLIST k, *kp;
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k.ch = ch;
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kp = bsearch(&k, keylist, nkeylist, sizeof(keylist[0]), v_key_cmp);
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return (kp == NULL ? K_NOTUSED : kp->value);
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}
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/*
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* v_event_push --
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* Push events/keys onto the front of the buffer.
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*
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* There is a single input buffer in ex/vi. Characters are put onto the
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* end of the buffer by the terminal input routines, and pushed onto the
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* front of the buffer by various other functions in ex/vi. Each key has
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* an associated flag value, which indicates if it has already been quoted,
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* and if it is the result of a mapping or an abbreviation.
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*
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* PUBLIC: int v_event_push __P((SCR *, EVENT *, CHAR_T *, size_t, u_int));
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*/
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int
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v_event_push(sp, p_evp, p_s, nitems, flags)
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SCR *sp;
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EVENT *p_evp; /* Push event. */
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CHAR_T *p_s; /* Push characters. */
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size_t nitems; /* Number of items to push. */
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u_int flags; /* CH_* flags. */
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{
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EVENT *evp;
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GS *gp;
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size_t total;
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/* If we have room, stuff the items into the buffer. */
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gp = sp->gp;
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if (nitems <= gp->i_next ||
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(gp->i_event != NULL && gp->i_cnt == 0 && nitems <= gp->i_nelem)) {
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if (gp->i_cnt != 0)
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gp->i_next -= nitems;
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goto copy;
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}
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/*
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* If there are currently items in the queue, shift them up,
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* leaving some extra room. Get enough space plus a little
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* extra.
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*/
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#define TERM_PUSH_SHIFT 30
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total = gp->i_cnt + gp->i_next + nitems + TERM_PUSH_SHIFT;
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if (total >= gp->i_nelem && v_event_grow(sp, MAX(total, 64)))
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return (1);
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if (gp->i_cnt)
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MEMMOVE(gp->i_event + TERM_PUSH_SHIFT + nitems,
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gp->i_event + gp->i_next, gp->i_cnt);
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gp->i_next = TERM_PUSH_SHIFT;
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/* Put the new items into the queue. */
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copy: gp->i_cnt += nitems;
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for (evp = gp->i_event + gp->i_next; nitems--; ++evp) {
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if (p_evp != NULL)
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*evp = *p_evp++;
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else {
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evp->e_event = E_CHARACTER;
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evp->e_c = *p_s++;
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evp->e_value = KEY_VAL(sp, evp->e_c);
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F_INIT(&evp->e_ch, flags);
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}
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}
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return (0);
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}
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/*
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* v_event_append --
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* Append events onto the tail of the buffer.
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*/
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static int
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v_event_append(sp, argp)
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SCR *sp;
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EVENT *argp;
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{
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CHAR_T *s; /* Characters. */
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EVENT *evp;
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GS *gp;
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size_t nevents; /* Number of events. */
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/* Grow the buffer as necessary. */
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nevents = argp->e_event == E_STRING ? argp->e_len : 1;
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gp = sp->gp;
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if (gp->i_event == NULL ||
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nevents > gp->i_nelem - (gp->i_next + gp->i_cnt))
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v_event_grow(sp, MAX(nevents, 64));
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evp = gp->i_event + gp->i_next + gp->i_cnt;
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gp->i_cnt += nevents;
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/* Transform strings of characters into single events. */
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if (argp->e_event == E_STRING)
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for (s = argp->e_csp; nevents--; ++evp) {
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evp->e_event = E_CHARACTER;
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evp->e_c = *s++;
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evp->e_value = KEY_VAL(sp, evp->e_c);
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evp->e_flags = 0;
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}
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else
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*evp = *argp;
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return (0);
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}
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/* Remove events from the queue. */
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#define QREM(len) { \
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if ((gp->i_cnt -= len) == 0) \
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gp->i_next = 0; \
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else \
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gp->i_next += len; \
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}
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/*
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* v_event_get --
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* Return the next event.
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*
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* !!!
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* The flag EC_NODIGIT probably needs some explanation. First, the idea of
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* mapping keys is that one or more keystrokes act like a function key.
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* What's going on is that vi is reading a number, and the character following
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* the number may or may not be mapped (EC_MAPCOMMAND). For example, if the
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* user is entering the z command, a valid command is "z40+", and we don't want
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* to map the '+', i.e. if '+' is mapped to "xxx", we don't want to change it
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* into "z40xxx". However, if the user enters "35x", we want to put all of the
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* characters through the mapping code.
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*
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* Historical practice is a bit muddled here. (Surprise!) It always permitted
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* mapping digits as long as they weren't the first character of the map, e.g.
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* ":map ^A1 xxx" was okay. It also permitted the mapping of the digits 1-9
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* (the digit 0 was a special case as it doesn't indicate the start of a count)
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* as the first character of the map, but then ignored those mappings. While
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* it's probably stupid to map digits, vi isn't your mother.
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*
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* The way this works is that the EC_MAPNODIGIT causes term_key to return the
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* end-of-digit without "looking" at the next character, i.e. leaving it as the
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* user entered it. Presumably, the next term_key call will tell us how the
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* user wants it handled.
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*
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* There is one more complication. Users might map keys to digits, and, as
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* it's described above, the commands:
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*
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* :map g 1G
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* d2g
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*
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* would return the keys "d2<end-of-digits>1G", when the user probably wanted
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* "d21<end-of-digits>G". So, if a map starts off with a digit we continue as
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* before, otherwise, we pretend we haven't mapped the character, and return
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* <end-of-digits>.
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*
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* Now that that's out of the way, let's talk about Energizer Bunny macros.
|
|
* It's easy to create macros that expand to a loop, e.g. map x 3x. It's
|
|
* fairly easy to detect this example, because it's all internal to term_key.
|
|
* If we're expanding a macro and it gets big enough, at some point we can
|
|
* assume it's looping and kill it. The examples that are tough are the ones
|
|
* where the parser is involved, e.g. map x "ayyx"byy. We do an expansion
|
|
* on 'x', and get "ayyx"byy. We then return the first 4 characters, and then
|
|
* find the looping macro again. There is no way that we can detect this
|
|
* without doing a full parse of the command, because the character that might
|
|
* cause the loop (in this case 'x') may be a literal character, e.g. the map
|
|
* map x "ayy"xyy"byy is perfectly legal and won't cause a loop.
|
|
*
|
|
* Historic vi tried to detect looping macros by disallowing obvious cases in
|
|
* the map command, maps that that ended with the same letter as they started
|
|
* (which wrongly disallowed "map x 'x"), and detecting macros that expanded
|
|
* too many times before keys were returned to the command parser. It didn't
|
|
* get many (most?) of the tricky cases right, however, and it was certainly
|
|
* possible to create macros that ran forever. And, even if it did figure out
|
|
* what was going on, the user was usually tossed into ex mode. Finally, any
|
|
* changes made before vi realized that the macro was recursing were left in
|
|
* place. We recover gracefully, but the only recourse the user has in an
|
|
* infinite macro loop is to interrupt.
|
|
*
|
|
* !!!
|
|
* It is historic practice that mapping characters to themselves as the first
|
|
* part of the mapped string was legal, and did not cause infinite loops, i.e.
|
|
* ":map! { {^M^T" and ":map n nz." were known to work. The initial, matching
|
|
* characters were returned instead of being remapped.
|
|
*
|
|
* !!!
|
|
* It is also historic practice that the macro "map ] ]]^" caused a single ]
|
|
* keypress to behave as the command ]] (the ^ got the map past the vi check
|
|
* for "tail recursion"). Conversely, the mapping "map n nn^" went recursive.
|
|
* What happened was that, in the historic vi, maps were expanded as the keys
|
|
* were retrieved, but not all at once and not centrally. So, the keypress ]
|
|
* pushed ]]^ on the stack, and then the first ] from the stack was passed to
|
|
* the ]] command code. The ]] command then retrieved a key without entering
|
|
* the mapping code. This could bite us anytime a user has a map that depends
|
|
* on secondary keys NOT being mapped. I can't see any possible way to make
|
|
* this work in here without the complete abandonment of Rationality Itself.
|
|
*
|
|
* XXX
|
|
* The final issue is recovery. It would be possible to undo all of the work
|
|
* that was done by the macro if we entered a record into the log so that we
|
|
* knew when the macro started, and, in fact, this might be worth doing at some
|
|
* point. Given that this might make the log grow unacceptably (consider that
|
|
* cursor keys are done with maps), for now we leave any changes made in place.
|
|
*
|
|
* PUBLIC: int v_event_get __P((SCR *, EVENT *, int, u_int32_t));
|
|
*/
|
|
int
|
|
v_event_get(sp, argp, timeout, flags)
|
|
SCR *sp;
|
|
EVENT *argp;
|
|
int timeout;
|
|
u_int32_t flags;
|
|
{
|
|
EVENT *evp, ev;
|
|
GS *gp;
|
|
SEQ *qp;
|
|
int init_nomap, ispartial, istimeout, remap_cnt;
|
|
|
|
gp = sp->gp;
|
|
|
|
/* If simply checking for interrupts, argp may be NULL. */
|
|
if (argp == NULL)
|
|
argp = &ev;
|
|
|
|
retry: istimeout = remap_cnt = 0;
|
|
|
|
/*
|
|
* If the queue isn't empty and we're timing out for characters,
|
|
* return immediately.
|
|
*/
|
|
if (gp->i_cnt != 0 && LF_ISSET(EC_TIMEOUT))
|
|
return (0);
|
|
|
|
/*
|
|
* If the queue is empty, we're checking for interrupts, or we're
|
|
* timing out for characters, get more events.
|
|
*/
|
|
if (gp->i_cnt == 0 || LF_ISSET(EC_INTERRUPT | EC_TIMEOUT)) {
|
|
/*
|
|
* If we're reading new characters, check any scripting
|
|
* windows for input.
|
|
*/
|
|
if (F_ISSET(gp, G_SCRWIN) && sscr_input(sp))
|
|
return (1);
|
|
loop: if (gp->scr_event(sp, argp,
|
|
LF_ISSET(EC_INTERRUPT | EC_QUOTED | EC_RAW), timeout))
|
|
return (1);
|
|
switch (argp->e_event) {
|
|
case E_ERR:
|
|
case E_SIGHUP:
|
|
case E_SIGTERM:
|
|
/*
|
|
* Fatal conditions cause the file to be synced to
|
|
* disk immediately.
|
|
*/
|
|
v_sync(sp, RCV_ENDSESSION | RCV_PRESERVE |
|
|
(argp->e_event == E_SIGTERM ? 0: RCV_EMAIL));
|
|
return (1);
|
|
case E_TIMEOUT:
|
|
istimeout = 1;
|
|
break;
|
|
case E_INTERRUPT:
|
|
/* Set the global interrupt flag. */
|
|
F_SET(sp->gp, G_INTERRUPTED);
|
|
|
|
/*
|
|
* If the caller was interested in interrupts, return
|
|
* immediately.
|
|
*/
|
|
if (LF_ISSET(EC_INTERRUPT))
|
|
return (0);
|
|
goto append;
|
|
default:
|
|
append: if (v_event_append(sp, argp))
|
|
return (1);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If the caller was only interested in interrupts or timeouts, return
|
|
* immediately. (We may have gotten characters, and that's okay, they
|
|
* were queued up for later use.)
|
|
*/
|
|
if (LF_ISSET(EC_INTERRUPT | EC_TIMEOUT))
|
|
return (0);
|
|
|
|
newmap: evp = &gp->i_event[gp->i_next];
|
|
|
|
/*
|
|
* If the next event in the queue isn't a character event, return
|
|
* it, we're done.
|
|
*/
|
|
if (evp->e_event != E_CHARACTER) {
|
|
*argp = *evp;
|
|
QREM(1);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* If the key isn't mappable because:
|
|
*
|
|
* + ... the timeout has expired
|
|
* + ... it's not a mappable key
|
|
* + ... neither the command or input map flags are set
|
|
* + ... there are no maps that can apply to it
|
|
*
|
|
* return it forthwith.
|
|
*/
|
|
if (istimeout || F_ISSET(&evp->e_ch, CH_NOMAP) ||
|
|
!LF_ISSET(EC_MAPCOMMAND | EC_MAPINPUT) ||
|
|
evp->e_c < MAX_BIT_SEQ && !bit_test(gp->seqb, evp->e_c))
|
|
goto nomap;
|
|
|
|
/* Search the map. */
|
|
qp = seq_find(sp, NULL, evp, NULL, gp->i_cnt,
|
|
LF_ISSET(EC_MAPCOMMAND) ? SEQ_COMMAND : SEQ_INPUT, &ispartial);
|
|
|
|
/*
|
|
* If get a partial match, get more characters and retry the map.
|
|
* If time out without further characters, return the characters
|
|
* unmapped.
|
|
*
|
|
* !!!
|
|
* <escape> characters are a problem. Cursor keys start with <escape>
|
|
* characters, so there's almost always a map in place that begins with
|
|
* an <escape> character. If we timeout <escape> keys in the same way
|
|
* that we timeout other keys, the user will get a noticeable pause as
|
|
* they enter <escape> to terminate input mode. If key timeout is set
|
|
* for a slow link, users will get an even longer pause. Nvi used to
|
|
* simply timeout <escape> characters at 1/10th of a second, but this
|
|
* loses over PPP links where the latency is greater than 100Ms.
|
|
*/
|
|
if (ispartial) {
|
|
if (O_ISSET(sp, O_TIMEOUT))
|
|
timeout = (evp->e_value == K_ESCAPE ?
|
|
O_VAL(sp, O_ESCAPETIME) :
|
|
O_VAL(sp, O_KEYTIME)) * 100;
|
|
else
|
|
timeout = 0;
|
|
goto loop;
|
|
}
|
|
|
|
/* If no map, return the character. */
|
|
if (qp == NULL) {
|
|
nomap: if (!isdigit(evp->e_c) && LF_ISSET(EC_MAPNODIGIT))
|
|
goto not_digit;
|
|
*argp = *evp;
|
|
QREM(1);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* If looking for the end of a digit string, and the first character
|
|
* of the map is it, pretend we haven't seen the character.
|
|
*/
|
|
if (LF_ISSET(EC_MAPNODIGIT) &&
|
|
qp->output != NULL && !isdigit(qp->output[0])) {
|
|
not_digit: argp->e_c = CH_NOT_DIGIT;
|
|
argp->e_value = K_NOTUSED;
|
|
argp->e_event = E_CHARACTER;
|
|
F_INIT(&argp->e_ch, 0);
|
|
return (0);
|
|
}
|
|
|
|
/* Find out if the initial segments are identical. */
|
|
init_nomap = !e_memcmp(qp->output, &gp->i_event[gp->i_next], qp->ilen);
|
|
|
|
/* Delete the mapped characters from the queue. */
|
|
QREM(qp->ilen);
|
|
|
|
/* If keys mapped to nothing, go get more. */
|
|
if (qp->output == NULL)
|
|
goto retry;
|
|
|
|
/* If remapping characters... */
|
|
if (O_ISSET(sp, O_REMAP)) {
|
|
/*
|
|
* Periodically check for interrupts. Always check the first
|
|
* time through, because it's possible to set up a map that
|
|
* will return a character every time, but will expand to more,
|
|
* e.g. "map! a aaaa" will always return a 'a', but we'll never
|
|
* get anywhere useful.
|
|
*/
|
|
if ((++remap_cnt == 1 || remap_cnt % 10 == 0) &&
|
|
(gp->scr_event(sp, &ev,
|
|
EC_INTERRUPT, 0) || ev.e_event == E_INTERRUPT)) {
|
|
F_SET(sp->gp, G_INTERRUPTED);
|
|
argp->e_event = E_INTERRUPT;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* If an initial part of the characters mapped, they are not
|
|
* further remapped -- return the first one. Push the rest
|
|
* of the characters, or all of the characters if no initial
|
|
* part mapped, back on the queue.
|
|
*/
|
|
if (init_nomap) {
|
|
if (v_event_push(sp, NULL, qp->output + qp->ilen,
|
|
qp->olen - qp->ilen, CH_MAPPED))
|
|
return (1);
|
|
if (v_event_push(sp, NULL,
|
|
qp->output, qp->ilen, CH_NOMAP | CH_MAPPED))
|
|
return (1);
|
|
evp = &gp->i_event[gp->i_next];
|
|
goto nomap;
|
|
}
|
|
if (v_event_push(sp, NULL, qp->output, qp->olen, CH_MAPPED))
|
|
return (1);
|
|
goto newmap;
|
|
}
|
|
|
|
/* Else, push the characters on the queue and return one. */
|
|
if (v_event_push(sp, NULL, qp->output, qp->olen, CH_MAPPED | CH_NOMAP))
|
|
return (1);
|
|
|
|
goto nomap;
|
|
}
|
|
|
|
/*
|
|
* v_sync --
|
|
* Walk the screen lists, sync'ing files to their backup copies.
|
|
*/
|
|
static void
|
|
v_sync(sp, flags)
|
|
SCR *sp;
|
|
int flags;
|
|
{
|
|
GS *gp;
|
|
|
|
gp = sp->gp;
|
|
for (sp = gp->dq.cqh_first; sp != (void *)&gp->dq; sp = sp->q.cqe_next)
|
|
rcv_sync(sp, flags);
|
|
for (sp = gp->hq.cqh_first; sp != (void *)&gp->hq; sp = sp->q.cqe_next)
|
|
rcv_sync(sp, flags);
|
|
}
|
|
|
|
/*
|
|
* v_event_err --
|
|
* Unexpected event.
|
|
*
|
|
* PUBLIC: void v_event_err __P((SCR *, EVENT *));
|
|
*/
|
|
void
|
|
v_event_err(sp, evp)
|
|
SCR *sp;
|
|
EVENT *evp;
|
|
{
|
|
switch (evp->e_event) {
|
|
case E_CHARACTER:
|
|
msgq(sp, M_ERR, "276|Unexpected character event");
|
|
break;
|
|
case E_EOF:
|
|
msgq(sp, M_ERR, "277|Unexpected end-of-file event");
|
|
break;
|
|
case E_INTERRUPT:
|
|
msgq(sp, M_ERR, "279|Unexpected interrupt event");
|
|
break;
|
|
case E_QUIT:
|
|
msgq(sp, M_ERR, "280|Unexpected quit event");
|
|
break;
|
|
case E_REPAINT:
|
|
msgq(sp, M_ERR, "281|Unexpected repaint event");
|
|
break;
|
|
case E_STRING:
|
|
msgq(sp, M_ERR, "285|Unexpected string event");
|
|
break;
|
|
case E_TIMEOUT:
|
|
msgq(sp, M_ERR, "286|Unexpected timeout event");
|
|
break;
|
|
case E_WRESIZE:
|
|
msgq(sp, M_ERR, "316|Unexpected resize event");
|
|
break;
|
|
case E_WRITE:
|
|
msgq(sp, M_ERR, "287|Unexpected write event");
|
|
break;
|
|
|
|
/*
|
|
* Theoretically, none of these can occur, as they're handled at the
|
|
* top editor level.
|
|
*/
|
|
case E_ERR:
|
|
case E_SIGHUP:
|
|
case E_SIGTERM:
|
|
default:
|
|
abort();
|
|
}
|
|
|
|
/* Free any allocated memory. */
|
|
if (evp->e_asp != NULL)
|
|
free(evp->e_asp);
|
|
}
|
|
|
|
/*
|
|
* v_event_flush --
|
|
* Flush any flagged keys, returning if any keys were flushed.
|
|
*
|
|
* PUBLIC: int v_event_flush __P((SCR *, u_int));
|
|
*/
|
|
int
|
|
v_event_flush(sp, flags)
|
|
SCR *sp;
|
|
u_int flags;
|
|
{
|
|
GS *gp;
|
|
int rval;
|
|
|
|
for (rval = 0, gp = sp->gp; gp->i_cnt != 0 &&
|
|
F_ISSET(&gp->i_event[gp->i_next].e_ch, flags); rval = 1)
|
|
QREM(1);
|
|
return (rval);
|
|
}
|
|
|
|
/*
|
|
* v_event_grow --
|
|
* Grow the terminal queue.
|
|
*/
|
|
static int
|
|
v_event_grow(sp, add)
|
|
SCR *sp;
|
|
int add;
|
|
{
|
|
GS *gp;
|
|
size_t new_nelem, olen;
|
|
|
|
gp = sp->gp;
|
|
new_nelem = gp->i_nelem + add;
|
|
olen = gp->i_nelem * sizeof(gp->i_event[0]);
|
|
BINC_RET(sp, gp->i_event, olen, new_nelem * sizeof(gp->i_event[0]));
|
|
gp->i_nelem = olen / sizeof(gp->i_event[0]);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* v_key_cmp --
|
|
* Compare two keys for sorting.
|
|
*/
|
|
static int
|
|
v_key_cmp(ap, bp)
|
|
const void *ap, *bp;
|
|
{
|
|
return (((KEYLIST *)ap)->ch - ((KEYLIST *)bp)->ch);
|
|
}
|