Esempio n. 1
0
void
vswitch(int cnt)
{
	if (cnt <= 1) {
		char mbuf[MB_LEN_MAX+4];
		int	n0, n1;
		setLAST();
		mbuf[0] = 'r';
		cswitch(&mbuf[1], &n1, cursor, &n0);
		if (cursor[n1] != '\0')
			mbuf[1+n1++] = ' ';
		mbuf[1+n1] = '\0';
		macpush(mbuf, 1);
	} else {	/* cnt > 1 */
		char *mbuf = smalloc(MAXDIGS + cnt*(mb_cur_max+1) + 5);
		register char *p = &mbuf[MAXDIGS + 1];
		int num, n0, n1, m;

		setLAST();
		*p++ = 's';
		for (num = 0, m = 0; num < cnt && cursor[m] != '\0'; num++) {
			*p++ = CTRL('v');
			cswitch(p, &n1, &cursor[m], &n0);
			p += n1;
			m += n0;
		}
		*p++ = ESCAPE;
		if (cursor[m])
			*p++ = ' ';
		*p++ = '\0';
		macpush(p_dconv((long)num, mbuf), 1);
		lastvgk = 0;
		free(mbuf);
	}
}
Esempio n. 2
0
vmain()
{
	register int c, cnt, i;
	char esave[TUBECOLS];
	char *oglobp;
	char d;
	line *addr;
	int ind, nlput;
	int shouldpo = 0;
	int onumber, olist, (*OPline)(), (*OPutchar)();

	vch_mac = VC_NOTINMAC;

	/*
	 * If we started as a vi command (on the command line)
	 * then go process initial commands (recover, next or tag).
	 */
	if (initev) {
		oglobp = globp;
		globp = initev;
		hadcnt = cnt = 0;
		i = tchng;
		addr = dot;
		goto doinit;
	}

	/*
	 * NB:
	 *
	 * The current line is always in the line buffer linebuf,
	 * and the cursor at the position cursor.  You should do
	 * a vsave() before moving off the line to make sure the disk
	 * copy is updated if it has changed, and a getDOT() to get
	 * the line back if you mung linebuf.  The motion
	 * routines in ex_vwind.c handle most of this.
	 */
	for (;;) {
		/*
		 * Decode a visual command.
		 * First sync the temp file if there has been a reasonable
		 * amount of change.  Clear state for decoding of next
		 * command.
		 */
		TSYNC();
		vglobp = 0;
		vreg = 0;
		hold = 0;
		seenprompt = 1;
		wcursor = 0;
		Xhadcnt = hadcnt = 0;
		Xcnt = cnt = 1;
		splitw = 0;
		if (i = holdupd) {
			if (state == VISUAL)
				ignore(peekkey());
			holdupd = 0;
/*
			if (LINE(0) < ZERO) {
				vclear();
				vcnt = 0;
				i = 3;
			}
*/
			if (state != VISUAL) {
				vcnt = 0;
				vsave();
				vrepaint(cursor);
			} else if (i == 3)
				vredraw(WTOP);
			else
				vsync(WTOP);
			vfixcurs();
		}

		/*
		 * Gobble up counts and named buffer specifications.
		 */
		for (;;) {
looptop:
#ifdef MDEBUG
			if (trace)
				fprintf(trace, "pc=%c",peekkey());
#endif
			if (isdigit(peekkey()) && peekkey() != '0') {
				hadcnt = 1;
				cnt = vgetcnt();
				forbid (cnt <= 0);
			}
			if (peekkey() != '"')
				break;
			ignore(getkey()), c = getkey();
			/*
			 * Buffer names be letters or digits.
			 * But not '0' as that is the source of
			 * an 'empty' named buffer spec in the routine
			 * kshift (see ex_temp.c).
			 */
			forbid (c == '0' || !isalpha(c) && !isdigit(c));
			vreg = c;
		}
reread:
		/*
		 * Come to reread from below after some macro expansions.
		 * The call to map allows use of function key pads
		 * by performing a terminal dependent mapping of inputs.
		 */
#ifdef MDEBUG
		if (trace)
			fprintf(trace,"pcb=%c,",peekkey());
#endif
		op = getkey();
		maphopcnt = 0;
		do {
			/*
			 * Keep mapping the char as long as it changes.
			 * This allows for double mappings, e.g., q to #,
			 * #1 to something else.
			 */
			c = op;
			op = map(c,arrows);
#ifdef MDEBUG
			if (trace)
				fprintf(trace,"pca=%c,",c);
#endif
			/*
			 * Maybe the mapped to char is a count. If so, we have
			 * to go back to the "for" to interpret it. Likewise
			 * for a buffer name.
			 */
			if ((isdigit(c) && c!='0') || c == '"') {
				ungetkey(c);
				goto looptop;
			}
			if (!value(REMAP)) {
				c = op;
				break;
			}
			if (++maphopcnt > 256)
				error("Infinite macro loop");
		} while (c != op);

		/*
		 * Begin to build an image of this command for possible
		 * later repeat in the buffer workcmd.  It will be copied
		 * to lastcmd by the routine setLAST
		 * if/when completely specified.
		 */
		lastcp = workcmd;
		if (!vglobp)
			*lastcp++ = c;

		/*
		 * First level command decode.
		 */
		switch (c) {

		/*
		 * ^L		Clear screen e.g. after transmission error.
		 */

		/*
		 * ^R		Retype screen, getting rid of @ lines.
		 *		If in open, equivalent to ^L.
		 *		On terminals where the right arrow key sends
		 *		^L we make ^R act like ^L, since there is no
		 *		way to get ^L.  These terminals (adm31, tvi)
		 *		are intelligent so ^R is useless.  Soroc
		 *		will probably foul this up, but nobody has
		 *		one of them.
		 */
		case CTRL(l):
		case CTRL(r):
			if (c == CTRL(l) || (KR && *KR==CTRL(l))) {
				vclear();
				vdirty(0, vcnt);
			}
			if (state != VISUAL) {
				/*
				 * Get a clean line, throw away the
				 * memory of what is displayed now,
				 * and move back onto the current line.
				 */
				vclean();
				vcnt = 0;
				vmoveto(dot, cursor, 0);
				continue;
			}
			vredraw(WTOP);
			/*
			 * Weird glitch -- when we enter visual
			 * in a very small window we may end up with
			 * no lines on the screen because the line
			 * at the top is too long.  This forces the screen
			 * to be expanded to make room for it (after
			 * we have printed @'s ick showing we goofed).
			 */
			if (vcnt == 0)
				vrepaint(cursor);
			vfixcurs();
			continue;

		/*
		 * $		Escape just cancels the current command
		 *		with a little feedback.
		 */
		case ESCAPE:
			beep();
			continue;

		/*
		 * @   		Macros. Bring in the macro and put it
		 *		in vmacbuf, point vglobp there and punt.
		 */
		 case '@':
			c = getesc();
			if (c == 0)
				continue;
			if (c == '@')
				c = lastmac;
			if (isupper(c))
				c = tolower(c);
			forbid(!islower(c));
			lastmac = c;
			vsave();
			CATCH
				char tmpbuf[BUFSIZ];

				regbuf(c,tmpbuf,sizeof(vmacbuf));
				macpush(tmpbuf, 1);
			ONERR
				lastmac = 0;
				splitw = 0;
				getDOT();
				vrepaint(cursor);
				continue;
			ENDCATCH
			vmacp = vmacbuf;
			goto reread;

		/*
		 * .		Repeat the last (modifying) open/visual command.
		 */
		case '.':
			/*
			 * Check that there was a last command, and
			 * take its count and named buffer unless they
			 * were given anew.  Special case if last command
			 * referenced a numeric named buffer -- increment
			 * the number and go to a named buffer again.
			 * This allows a sequence like "1pu.u.u...
			 * to successively look for stuff in the kill chain
			 * much as one does in EMACS with C-Y and M-Y.
			 */
			forbid (lastcmd[0] == 0);
			if (hadcnt)
				lastcnt = cnt;
			if (vreg)
				lastreg = vreg;
			else if (isdigit(lastreg) && lastreg < '9')
				lastreg++;
			vreg = lastreg;
			cnt = lastcnt;
			hadcnt = lasthad;
			vglobp = lastcmd;
			goto reread;

		/*
		 * ^U		Scroll up.  A count sticks around for
		 *		future scrolls as the scroll amount.
		 *		Attempt to hold the indentation from the
		 *		top of the screen (in logical lines).
		 *
		 * BUG:		A ^U near the bottom of the screen
		 *		on a dumb terminal (which can't roll back)
		 *		causes the screen to be cleared and then
		 *		redrawn almost as it was.  In this case
		 *		one should simply move the cursor.
		 */
		case CTRL(u):
			if (hadcnt)
				vSCROLL = cnt;
			cnt = vSCROLL;
			if (state == VISUAL)
				ind = vcline, cnt += ind;
			else
				ind = 0;
			vmoving = 0;
			vup(cnt, ind, 1);
			vnline(NOSTR);
			continue;

		/*
		 * ^D		Scroll down.  Like scroll up.
		 */
		case CTRL(d):
#ifdef TRACE
		if (trace)
			fprintf(trace, "before vdown in ^D, dot=%d, wdot=%d, dol=%d\n", lineno(dot), lineno(wdot), lineno(dol));
#endif
			if (hadcnt)
				vSCROLL = cnt;
			cnt = vSCROLL;
			if (state == VISUAL)
				ind = vcnt - vcline - 1, cnt += ind;
			else
				ind = 0;
			vmoving = 0;
			vdown(cnt, ind, 1);
#ifdef TRACE
		if (trace)
			fprintf(trace, "before vnline in ^D, dot=%d, wdot=%d, dol=%d\n", lineno(dot), lineno(wdot), lineno(dol));
#endif
			vnline(NOSTR);
#ifdef TRACE
		if (trace)
			fprintf(trace, "after vnline in ^D, dot=%d, wdot=%d, dol=%d\n", lineno(dot), lineno(wdot), lineno(dol));
#endif
			continue;

		/*
		 * ^E		Glitch the screen down (one) line.
		 *		Cursor left on same line in file.
		 */
		case CTRL(e):
			if (state != VISUAL)
				continue;
			if (!hadcnt)
				cnt = 1;
			/* Bottom line of file already on screen */
			forbid(lineDOL()-lineDOT() <= vcnt-1-vcline);
			ind = vcnt - vcline - 1 + cnt;
			vdown(ind, ind, 1);
			vnline(cursor);
			continue;

		/*
		 * ^Y		Like ^E but up
		 */
		case CTRL(y):
			if (state != VISUAL)
				continue;
			if (!hadcnt)
				cnt = 1;
			forbid(lineDOT()-1<=vcline); /* line 1 already there */
			ind = vcline + cnt;
			vup(ind, ind, 1);
			vnline(cursor);
			continue;


		/*
		 * m		Mark position in mark register given
		 *		by following letter.  Return is
		 *		accomplished via ' or `; former
		 *		to beginning of line where mark
		 *		was set, latter to column where marked.
		 */
		case 'm':
			/*
			 * Getesc is generally used when a character
			 * is read as a latter part of a command
			 * to allow one to hit rubout/escape to cancel
			 * what you have typed so far.  These characters
			 * are mapped to 0 by the subroutine.
			 */
			c = getesc();
			if (c == 0)
				continue;

			/*
			 * Markreg checks that argument is a letter
			 * and also maps ' and ` to the end of the range
			 * to allow '' or `` to reference the previous
			 * context mark.
			 */
			c = markreg(c);
			forbid (c == 0);
			vsave();
			names[c - 'a'] = (*dot &~ 01);
			ncols[c - 'a'] = cursor;
			anymarks = 1;
			continue;

		/*
		 * ^F		Window forwards, with 2 lines of continuity.
		 *		Count repeats.
		 */
		case CTRL(f):
			vsave();
			if (vcnt > 2) {
				addr = dot + (vcnt - vcline) - 2 + (cnt-1)*basWLINES;
				forbid(addr > dol);
				dot = addr;
				vcnt = vcline = 0;
			}
			vzop(0, 0, '+');
			continue;

		/*
		 * ^B		Window backwards, with 2 lines of continuity.
		 *		Inverse of ^F.
		 */
		case CTRL(b):
			vsave();
			if (one + vcline != dot && vcnt > 2) {
				addr = dot - vcline - 2 + (cnt-1)*basWLINES;
				forbid (addr <= zero);
				dot = addr;
				vcnt = vcline = 0;
			}
			vzop(0, 0, '^');
			continue;

		/*
		 * z		Screen adjustment, taking a following character:
		 *			z<CR>		current line to top
		 *			z<NL>		like z<CR>
		 *			z-		current line to bottom
		 *		also z+, z^ like ^F and ^B.
		 *		A preceding count is line to use rather
		 *		than current line.  A count between z and
		 *		specifier character changes the screen size
		 *		for the redraw.
		 *
		 */
		case 'z':
			if (state == VISUAL) {
				i = vgetcnt();
				if (i > 0)
					vsetsiz(i);
				c = getesc();
				if (c == 0)
					continue;
			}
			vsave();
			vzop(hadcnt, cnt, c);
			continue;

		/*
		 * Y		Yank lines, abbreviation for y_ or yy.
		 *		Yanked lines can be put later if no
		 *		changes intervene, or can be put in named
		 *		buffers and put anytime in this session.
		 */
		case 'Y':
			ungetkey('_');
			c = 'y';
			break;

		/*
		 * J		Join lines, 2 by default.  Count is number
		 *		of lines to join (no join operator sorry.)
		 */
		case 'J':
			forbid (dot == dol);
			if (cnt == 1)
				cnt = 2;
			if (cnt > (i = dol - dot + 1))
				cnt = i;
			vsave();
			vmacchng(1);
			setLAST();
			cursor = strend(linebuf);
			vremote(cnt, join, 0);
			notenam = "join";
			vmoving = 0;
			killU();
			vreplace(vcline, cnt, 1);
			if (!*cursor && cursor > linebuf)
				cursor--;
			if (notecnt == 2)
				notecnt = 0;
			vrepaint(cursor);
			continue;

		/*
		 * S		Substitute text for whole lines, abbrev for c_.
		 *		Count is number of lines to change.
		 */
		case 'S':
			ungetkey('_');
			c = 'c';
			break;

		/*
		 * O		Create a new line above current and accept new
		 *		input text, to an escape, there.
		 *		A count specifies, for dumb terminals when
		 *		slowopen is not set, the number of physical
		 *		line space to open on the screen.
		 *
		 * o		Like O, but opens lines below.
		 */
		case 'O':
		case 'o':
			vmacchng(1);
			voOpen(c, cnt);
			continue;

		/*
		 * C		Change text to end of line, short for c$.
		 */
		case 'C':
			if (*cursor) {
				ungetkey('$'), c = 'c';
				break;
			}
			goto appnd;

		/*
		 * ~	Switch case of letter under cursor
		 */
		case '~':
			{
				char mbuf[4];
				setLAST();
				mbuf[0] = 'r';
				mbuf[1] = *cursor;
				mbuf[2] = cursor[1]==0 ? 0 : ' ';
				mbuf[3] = 0;
				if (isalpha(mbuf[1]))
					mbuf[1] ^= ' ';	/* toggle the case */
				macpush(mbuf, 1);
			}
			continue;


		/*
		 * A		Append at end of line, short for $a.
		 */
		case 'A':
			operate('$', 1);
appnd:
			c = 'a';
			/* fall into ... */

		/*
		 * a		Appends text after cursor.  Text can continue
		 *		through arbitrary number of lines.
		 */
		case 'a':
			if (*cursor) {
				if (state == HARDOPEN)
					putchar(*cursor);
				cursor++;
			}
			goto insrt;

		/*
		 * I		Insert at beginning of whitespace of line,
		 *		short for ^i.
		 */
		case 'I':
			operate('^', 1);
			c = 'i';
			/* fall into ... */

		/*
		 * R		Replace characters, one for one, by input
		 *		(logically), like repeated r commands.
		 *
		 * BUG:		This is like the typeover mode of many other
		 *		editors, and is only rarely useful.  Its
		 *		implementation is a hack in a low level
		 *		routine and it doesn't work very well, e.g.
		 *		you can't move around within a R, etc.
		 */
		case 'R':
			/* fall into... */

		/*
		 * i		Insert text to an escape in the buffer.
		 *		Text is arbitrary.  This command reminds of
		 *		the i command in bare teco.
		 */
		case 'i':
insrt:
			/*
			 * Common code for all the insertion commands.
			 * Save for redo, position cursor, prepare for append
			 * at command and in visual undo.  Note that nothing
			 * is doomed, unless R when all is, and save the
			 * current line in a the undo temporary buffer.
			 */
			vmacchng(1);
			setLAST();
			vcursat(cursor);
			prepapp();
			vnoapp();
			doomed = c == 'R' ? 10000 : 0;
			if(FIXUNDO)
				vundkind = VCHNG;
			vmoving = 0;
			CP(vutmp, linebuf);

			/*
			 * If this is a repeated command, then suppress
			 * fake insert mode on dumb terminals which looks
			 * ridiculous and wastes lots of time even at 9600B.
			 */
			if (vglobp)
				hold = HOLDQIK;
			vappend(c, cnt, 0);
			continue;

		/*
		 * ^?		An attention, normally a ^?, just beeps.
		 *		If you are a vi command within ex, then
		 *		two ATTN's will drop you back to command mode.
		 */
		case ATTN:
			beep();
			if (initev || peekkey() != ATTN)
				continue;
			/* fall into... */

		/*
		 * ^\		A quit always gets command mode.
		 */
		case QUIT:
			/*
			 * Have to be careful if we were called
			 *	g/xxx/vi
			 * since a return will just start up again.
			 * So we simulate an interrupt.
			 */
			if (inglobal)
				onintr();
			/* fall into... */

#ifdef notdef
		/*
		 * q		Quit back to command mode, unless called as
		 *		vi on command line in which case dont do it
		 */
		case 'q':	/* quit */
			if (initev) {
				vsave();
				CATCH
					error("Q gets ex command mode, :q leaves vi");
				ENDCATCH
				splitw = 0;
				getDOT();
				vrepaint(cursor);
				continue;
			}
#endif
			/* fall into... */

		/*
		 * Q		Is like q, but always gets to command mode
		 *		even if command line invocation was as vi.
		 */
		case 'Q':
			vsave();
			/*
			 * If we are in the middle of a macro, throw away
			 * the rest and fix up undo.
			 * This code copied from getbr().
			 */
			if (vmacp) {
				vmacp = 0;
				if (inopen == -1)	/* don't screw up undo for esc esc */
					vundkind = VMANY;
				inopen = 1;	/* restore old setting now that macro done */
			}
			return;


		/*
		 * ZZ		Like :x
		 */
		 case 'Z':
			forbid(getkey() != 'Z');
			oglobp = globp;
			globp = "x";
			vclrech(0);
			goto gogo;
			
		/*
		 * P		Put back text before cursor or before current
		 *		line.  If text was whole lines goes back
		 *		as whole lines.  If part of a single line
		 *		or parts of whole lines splits up current
		 *		line to form many new lines.
		 *		May specify a named buffer, or the delete
		 *		saving buffers 1-9.
		 *
		 * p		Like P but after rather than before.
		 */
		case 'P':
		case 'p':
			vmoving = 0;
#ifdef notdef
			forbid (!vreg && value(UNDOMACRO) && inopen < 0);
#endif
			/*
			 * If previous delete was partial line, use an
			 * append or insert to put it back so as to
			 * use insert mode on intelligent terminals.
			 */
			if (!vreg && DEL[0]) {
				forbid ((DEL[0] & (QUOTE|TRIM)) == OVERBUF);
				vglobp = DEL;
				ungetkey(c == 'p' ? 'a' : 'i');
				goto reread;
			}

			/*
			 * If a register wasn't specified, then make
			 * sure there is something to put back.
			 */
			forbid (!vreg && unddol == dol);
			/*
			 * If we just did a macro the whole buffer is in
			 * the undo save area.  We don't want to put THAT.
			 */
			forbid (vundkind == VMANY && undkind==UNDALL);
			vsave();
			vmacchng(1);
			setLAST();
			i = 0;
			if (vreg && partreg(vreg) || !vreg && pkill[0]) {
				/*
				 * Restoring multiple lines which were partial
				 * lines; will leave cursor in middle
				 * of line after shoving restored text in to
				 * split the current line.
				 */
				i++;
				if (c == 'p' && *cursor)
					cursor++;
			} else {
				/*
				 * In whole line case, have to back up dot
				 * for P; also want to clear cursor so
				 * cursor will eventually be positioned
				 * at the beginning of the first put line.
				 */
				cursor = 0;
				if (c == 'P') {
					dot--, vcline--;
					c = 'p';
				}
			}
			killU();

			/*
			 * The call to putreg can potentially
			 * bomb since there may be nothing in a named buffer.
			 * We thus put a catch in here.  If we didn't and
			 * there was an error we would end up in command mode.
			 */
			addr = dol;	/* old dol */
			CATCH
				vremote(1, vreg ? putreg : put, vreg);
			ONERR
				if (vreg == -1) {
					splitw = 0;
					if (op == 'P')
						dot++, vcline++;
					goto pfixup;
				}
			ENDCATCH
			splitw = 0;
			nlput = dol - addr + 1;
			if (!i) {
				/*
				 * Increment undap1, undap2 to make up
				 * for their incorrect initialization in the
				 * routine vremote before calling put/putreg.
				 */
				if (FIXUNDO)
					undap1++, undap2++;
				vcline++;
				nlput--;

				/*
				 * After a put want current line first line,
				 * and dot was made the last line put in code
				 * run so far.  This is why we increment vcline
				 * above and decrease dot here.
				 */
				dot -= nlput - 1;
			}
#ifdef TRACE
			if (trace)
				fprintf(trace, "vreplace(%d, %d, %d), undap1=%d, undap2=%d, dot=%d\n", vcline, i, nlput, lineno(undap1), lineno(undap2), lineno(dot));
#endif
			vreplace(vcline, i, nlput);
			if (state != VISUAL) {
				/*
				 * Special case in open mode.
				 * Force action on the screen when a single
				 * line is put even if it is identical to
				 * the current line, e.g. on YP; otherwise
				 * you can't tell anything happened.
				 */
				vjumpto(dot, cursor, '.');
				continue;
			}
pfixup:
			vrepaint(cursor);
			vfixcurs();
			continue;

		/*
		 * ^^		Return to previous file.
		 *		Like a :e #, and thus can be used after a
		 *		"No Write" diagnostic.
		 */
		case CTRL(^):
			forbid (hadcnt);
			vsave();
			ckaw();
			oglobp = globp;
			if (value(AUTOWRITE))
				globp = "e! #";
			else
				globp = "e #";
			goto gogo;

		/*
		 * ^]		Takes word after cursor as tag, and then does
		 *		tag command.  Read ``go right to''.
		 */
		case CTRL(]):
			grabtag();
			oglobp = globp;
			globp = "tag";
			goto gogo;

		/*
		 * &		Like :&
		 */
		 case '&':
			oglobp = globp;
			globp = "&";
			goto gogo;
			
		/*
		 * ^G		Bring up a status line at the bottom of
		 *		the screen, like a :file command.
		 *
		 * BUG:		Was ^S but doesn't work in cbreak mode
		 */
		case CTRL(g):
			oglobp = globp;
			globp = "file";
gogo:
			addr = dot;
			vsave();
			goto doinit;

#ifdef SIGTSTP
		/*
		 * ^Z:	suspend editor session and temporarily return
		 * 	to shell.  Only works with Berkeley/IIASA process
		 *	control in kernel.
		 */
		case CTRL(z):
			forbid(dosusp == 0 || !ldisc);
			vsave();
			oglobp = globp;
			globp = "stop";
			goto gogo;
#endif

		/*
		 * :		Read a command from the echo area and
		 *		execute it in command mode.
		 */
		case ':':
			forbid (hadcnt);
			vsave();
			i = tchng;
			addr = dot;
			if (readecho(c)) {
				esave[0] = 0;
				goto fixup;
			}
			getDOT();
			/*
			 * Use the visual undo buffer to store the global
			 * string for command mode, since it is idle right now.
			 */
			oglobp = globp; strcpy(vutmp, genbuf+1); globp = vutmp;
doinit:
			esave[0] = 0;
			fixech();

			/*
			 * Have to finagle around not to lose last
			 * character after this command (when run from ex
			 * command mode).  This is clumsy.
			 */
			d = peekc; ungetchar(0);
			if (shouldpo) {
				/*
				 * So after a "Hit return..." ":", we do
				 * another "Hit return..." the next time
				 */
				pofix();
				shouldpo = 0;
			}
			CATCH
				/*
				 * Save old values of options so we can
				 * notice when they change; switch into
				 * cooked mode so we are interruptible.
				 */
				onumber = value(NUMBER);
				olist = value(LIST);
				OPline = Pline;
				OPutchar = Putchar;
#ifndef CBREAK
				vcook();
#endif
				commands(1, 1);
				if (dot == zero && dol > zero)
					dot = one;
#ifndef CBREAK
				vraw();
#endif
			ONERR
#ifndef CBREAK
				vraw();
#endif
				copy(esave, vtube[WECHO], TUBECOLS);
			ENDCATCH
			fixol();
			Pline = OPline;
			Putchar = OPutchar;
			ungetchar(d);
			globp = oglobp;

			/*
			 * If we ended up with no lines in the buffer, make
			 * a line, and don't consider the buffer changed.
			 */
			if (dot == zero) {
				fixzero();
				sync();
			}
			splitw = 0;

			/*
			 * Special case: did list/number options change?
			 */
			if (onumber != value(NUMBER))
				setnumb(value(NUMBER));
			if (olist != value(LIST))
				setlist(value(LIST));

fixup:
			/*
			 * If a change occurred, other than
			 * a write which clears changes, then
			 * we should allow an undo even if .
			 * didn't move.
			 *
			 * BUG: You can make this wrong by
			 * tricking around with multiple commands
			 * on one line of : escape, and including
			 * a write command there, but its not
			 * worth worrying about.
			 */
			if (FIXUNDO && tchng && tchng != i)
				vundkind = VMANY, cursor = 0;

			/*
			 * If we are about to do another :, hold off
			 * updating of screen.
			 */
			if (vcnt < 0 && Peekkey == ':') {
				getDOT();
				shouldpo = 1;
				continue;
			}
			shouldpo = 0;

			/*
			 * In the case where the file being edited is
			 * new; e.g. if the initial state hasn't been
			 * saved yet, then do so now.
			 */
			if (unddol == truedol) {
				vundkind = VNONE;
				Vlines = lineDOL();
				if (!inglobal)
					savevis();
				addr = zero;
				vcnt = 0;
				if (esave[0] == 0)
					copy(esave, vtube[WECHO], TUBECOLS);
			}

			/*
			 * If the current line moved reset the cursor position.
			 */
			if (dot != addr) {
				vmoving = 0;
				cursor = 0;
			}

			/*
			 * If current line is not on screen or if we are
			 * in open mode and . moved, then redraw.
			 */
			i = vcline + (dot - addr);
			if (i < 0 || i >= vcnt && i >= -vcnt || state != VISUAL && dot != addr) {
				if (state == CRTOPEN)
					vup1();
				if (vcnt > 0)
					vcnt = 0;
				vjumpto(dot, (char *) 0, '.');
			} else {
				/*
				 * Current line IS on screen.
				 * If we did a [Hit return...] then
				 * restore vcnt and clear screen if in visual
				 */
				vcline = i;
				if (vcnt < 0) {
					vcnt = -vcnt;
					if (state == VISUAL)
						vclear();
					else if (state == CRTOPEN) {
						vcnt = 0;
					}
				}

				/*
				 * Limit max value of vcnt based on $
				 */
				i = vcline + lineDOL() - lineDOT() + 1;
				if (i < vcnt)
					vcnt = i;
				
				/*
				 * Dirty and repaint.
				 */
				vdirty(0, LINES);
				vrepaint(cursor);
			}

			/*
			 * If in visual, put back the echo area
			 * if it was clobberred.
			 */
			if (state == VISUAL) {
				int sdc = destcol, sdl = destline;

				splitw++;
				vigoto(WECHO, 0);
				for (i = 0; i < TUBECOLS - 1; i++) {
					if (esave[i] == 0)
						break;
					vputchar(esave[i]);
				}
				splitw = 0;
				vgoto(sdl, sdc);
			}
			continue;

		/*
		 * u		undo the last changing command.
		 */
		case 'u':
			vundo(1);
			continue;

		/*
		 * U		restore current line to initial state.
		 */
		case 'U':
			vUndo();
			continue;

fonfon:
			beep();
			vmacp = 0;
			inopen = 1;	/* might have been -1 */
			continue;
		}

		/*
		 * Rest of commands are decoded by the operate
		 * routine.
		 */
		operate(c, cnt);
	}
}
Esempio n. 3
0
/*
 * Get a line into genbuf after gcursor.
 * Cnt limits the number of input characters
 * accepted and is used for handling the replace
 * single character command.  Aescaped is the location
 * where we stick a termination indicator (whether we
 * ended with an ESCAPE or a newline/return.
 *
 * We do erase-kill type processing here and also
 * are careful about the way we do this so that it is
 * repeatable.  (I.e. so that your kill doesn't happen,
 * when you repeat an insert if it was escaped with \ the
 * first time you did it.  commch is the command character
 * involved, including the prompt for readline.
 */
char *
vgetline(int cnt, char *gcursor, bool *aescaped, int commch)
{
	register int c, ch;
	register char *cp;
	int x, y, iwhite, backsl=0;
	cell *iglobp;
	char cstr[2];
	int (*OO)(int) = Outchar;

	/*
	 * Clear the output state and counters
	 * for autoindent backwards motion (counts of ^D, etc.)
	 * Remember how much white space at beginning of line so
	 * as not to allow backspace over autoindent.
	 */
	*aescaped = 0;
	ogcursor = gcursor;
	flusho();
	CDCNT = 0;
	HADUP = 0;
	HADZERO = 0;
	gobbled = 0;
	iwhite = whitecnt(genbuf);
	iglobp = vglobp;

	/*
	 * Carefully avoid using vinschar in the echo area.
	 */
	if (splitw)
		Outchar = vputchar;
	else {
		Outchar = vinschar;
		vprepins();
	}
	for (;;) {
		backsl = 0;
		if (gobblebl)
			gobblebl--;
		if (cnt != 0) {
			cnt--;
			if (cnt == 0)
				goto vadone;
		}
		c = getkey();
		if (c != ATTN)
			c &= (QUOTE|TRIM);
		ch = c;
		maphopcnt = 0;
		if (vglobp == 0 && Peekkey == 0 && commch != 'r')
			while ((ch = map(c, immacs)) != c) {
				c = ch;
				if (!value(REMAP))
					break;
				if (++maphopcnt > 256)
					error(catgets(catd, 1, 234,
						"Infinite macro loop"));
			}
		if (!iglobp) {

			/*
			 * Erase-kill type processing.
			 * Only happens if we were not reading
			 * from untyped input when we started.
			 * Map users erase to ^H, kill to -1 for switch.
			 */
			if (c == tty.c_cc[VERASE])
				c = CTRL('h');
			else if (c == tty.c_cc[VKILL])
				c = -1;
			if (c == ATTN)
				goto case_ATTN;
			switch (c) {

			/*
			 * ^?		Interrupt drops you back to visual
			 *		command mode with an unread interrupt
			 *		still in the input buffer.
			 *
			 * ^\		Quit does the same as interrupt.
			 *		If you are a ex command rather than
			 *		a vi command this will drop you
			 *		back to command mode for sure.
			 */
			case QUIT:
case_ATTN:
				ungetkey(c);
				goto vadone;

			/*
			 * ^H		Backs up a character in the input.
			 *
			 * BUG:		Can't back around line boundaries.
			 *		This is hard because stuff has
			 *		already been saved for repeat.
			 */
			case CTRL('h'):
bakchar:
				cp = gcursor + skipleft(ogcursor, gcursor);
				if (cp < ogcursor) {
					if (splitw) {
						/*
						 * Backspacing over readecho
						 * prompt. Pretend delete but
						 * don't beep.
						 */
						ungetkey(c);
						goto vadone;
					}
					beep();
					continue;
				}
				goto vbackup;

			/*
			 * ^W		Back up a white/non-white word.
			 */
			case CTRL('w'):
				wdkind = 1;
				for (cp = gcursor; cp > ogcursor
						&& isspace(cp[-1]&0377); cp--)
					continue;
				for (c = wordch(cp - 1);
				    cp > ogcursor && wordof(c, cp - 1); cp--)
					continue;
				goto vbackup;

			/*
			 * users kill	Kill input on this line, back to
			 *		the autoindent.
			 */
			case -1:
				cp = ogcursor;
vbackup:
				if (cp == gcursor) {
					beep();
					continue;
				}
				endim();
				*cp = 0;
				c = cindent();
				vgotoCL(qcolumn(cursor +
					skipleft(linebuf, cursor), genbuf));
				if (doomed >= 0)
					doomed += c - cindent();
				gcursor = cp;
				continue;

			/*
			 * \		Followed by erase or kill
			 *		maps to just the erase or kill.
			 */
			case '\\':
				x = destcol, y = destline;
				putchar('\\');
				vcsync();
				c = getkey();
				if (c == tty.c_cc[VERASE]
				    || c == tty.c_cc[VKILL])
				{
					vgoto(y, x);
					if (doomed >= 0)
						doomed++;
					goto def;
				}
				ungetkey(c), c = '\\';
				backsl = 1;
				break;

			/*
			 * ^Q		Super quote following character
			 *		Only ^@ is verboten (trapped at
			 *		a lower level) and \n forces a line
			 *		split so doesn't really go in.
			 *
			 * ^V		Synonym for ^Q
			 */
			case CTRL('q'):
			case CTRL('v'):
				x = destcol, y = destline;
				putchar('^');
				vgoto(y, x);
				c = getkey();
				if (c != NL) {
					if (doomed >= 0)
						doomed++;
					goto def;
				}
				break;
			}
		}

		/*
		 * If we get a blank not in the echo area
		 * consider splitting the window in the wrapmargin.
		 */
		if (c != NL && !splitw) {
			if (c == ' ' && gobblebl) {
				gobbled = 1;
				continue;
			}
			if (value(WRAPMARGIN) &&
				(outcol >= OCOLUMNS - value(WRAPMARGIN) ||
				 (backsl && outcol == 0)) &&
				commch != 'r') {
				/*
				 * At end of word and hit wrapmargin.
				 * Move the word to next line and keep going.
				 */
				wdkind = 1;
				gappend(c);
				if (backsl)
					gappend(getkey());
				*gcursor = 0;
				/*
				 * Find end of previous word if we are past it.
				 */
				for (cp=gcursor; cp>ogcursor
						&& isspace(cp[-1]&0377); cp--)
					;
				if (outcol+(backsl?OCOLUMNS:0) - (gcursor-cp) >= OCOLUMNS - value(WRAPMARGIN)) {
					/*
					 * Find beginning of previous word.
					 */
					for (; cp>ogcursor && !isspace(cp[-1]&0377); cp--)
						;
					if (cp <= ogcursor) {
						/*
						 * There is a single word that
						 * is too long to fit.  Just
						 * let it pass, but beep for
						 * each new letter to warn
						 * the luser.
						 */
						c = *--gcursor;
						*gcursor = 0;
						beep();
						goto dontbreak;
					}
					/*
					 * Save it for next line.
					 */
					macpush(cp, 0);
					cp--;
				}
				macpush("\n", 0);
				/*
				 * Erase white space before the word.
				 */
				while (cp > ogcursor && isspace(cp[-1]&0377))
					cp--;	/* skip blank */
				gobblebl = 3;
				goto vbackup;
			}
		dontbreak:;
		}

		/*
		 * Word abbreviation mode.
		 */
		cstr[0] = c;
		if (anyabbrs && gcursor > ogcursor && !wordch(cstr) && wordch(gcursor-1)) {
				int wdtype, abno;

				cstr[1] = 0;
				wdkind = 1;
				cp = gcursor + skipleft(ogcursor, gcursor);
				for (wdtype = wordch(cp - 1);
				    cp > ogcursor && wordof(wdtype, cp - 1); cp--)
					;
				*gcursor = 0;
				for (abno=0; abbrevs[abno].mapto; abno++) {
					if (!abbrevs[abno].hadthis &&
						eq(cp, abbrevs[abno].cap)) {
						abbrevs[abno].hadthis++;
						macpush(cstr, 0);
						macpush(abbrevs[abno].mapto, 0);
						goto vbackup;
					}
				}
		}

#ifdef	BIT8
		if (c == OVERBUF)
			goto btrp;
#endif
		switch (c) {

		/*
		 * ^M		Except in repeat maps to \n.
		 */
		case CR:
			if (vglobp)
				goto def;
			c = '\n';
			/* presto chango ... */

		/*
		 * \n		Start new line.
		 */
		case NL:
			*aescaped = c;
			goto vadone;

		/*
		 * escape	End insert unless repeat and more to repeat.
		 */
		case ESCAPE:
			if (lastvgk)
				goto def;
			goto vadone;

		/*
		 * ^D		Backtab.
		 * ^T		Software forward tab.
		 *
		 *		Unless in repeat where this means these
		 *		were superquoted in.
		 */
		case CTRL('d'):
		case CTRL('t'):
			if (vglobp)
				goto def;
			/* fall into ... */

		/*
		 * ^D|QUOTE	Is a backtab (in a repeated command).
		 */
#ifndef	BIT8
		case CTRL('d') | QUOTE:
#else
btrp:
#endif
			*gcursor = 0;
			cp = vpastwh(genbuf);
			c = whitecnt(genbuf);
			if (ch == CTRL('t')) {
				/*
				 * ^t just generates new indent replacing
				 * current white space rounded up to soft
				 * tab stop increment.
				 */
				if (cp != gcursor)
					/*
					 * BUG:		Don't hack ^T except
					 *		right after initial
					 *		white space.
					 */
					continue;
				cp = genindent(iwhite = backtab(c + value(SHIFTWIDTH) + 1));
				ogcursor = cp;
				goto vbackup;
			}
			/*
			 * ^D works only if we are at the (end of) the
			 * generated autoindent.  We count the ^D for repeat
			 * purposes.
			 */
			if (c == iwhite && c != 0) {
				if (cp == gcursor) {
					iwhite = backtab(c);
					CDCNT++;
					ogcursor = cp = genindent(iwhite);
					goto vbackup;
				} else if (&cp[1] == gcursor &&
				    (*cp == '^' || *cp == '0')) {
					/*
					 * ^^D moves to margin, then back
					 * to current indent on next line.
					 *
					 * 0^D moves to margin and then
					 * stays there.
					 */
					HADZERO = *cp == '0';
					ogcursor = cp = genbuf;
					HADUP = 1 - HADZERO;
					CDCNT = 1;
					endim();
					back1();
					vputchar(' ');
					goto vbackup;
				}
			}
			if (vglobp && vglobp - iglobp >= 2 &&
			    (vglobp[-2] == '^' || vglobp[-2] == '0')
			    && gcursor == ogcursor + 1)
				goto bakchar;
			continue;

		default:
			/*
			 * Possibly discard control inputs.
			 */
			if (!vglobp && junk(c)) {
				beep();
				continue;
			}
def:
			if (!backsl) {
				/* int cnt; */
				putchar(c);
				flush();
			}
			if (gcursor > &genbuf[LBSIZE - 2])
				error(catgets(catd, 1, 235, "Line too long"));
			gappend(c & TRIM);
			vcsync();
			if (value(SHOWMATCH) && !iglobp)
				if (c == ')' || c == '}')
					lsmatch(gcursor);
			continue;
		}
	}
vadone:
	*gcursor = 0;
	if (Outchar != termchar)
		Outchar = OO;
	endim();
	return (gcursor);
}
Esempio n. 4
0
int
map(int c, struct maps *maps)
{
	register int d;
	register char *p, *q;
	char b[10];	/* Assumption: no keypad sends string longer than 10 */

	/*
	 * Mapping for special keys on the terminal only.
	 * BUG: if there's a long sequence and it matches
	 * some chars and then misses, we lose some chars.
	 *
	 * For this to work, some conditions must be met.
	 * 1) Keypad sends SHORT (2 or 3 char) strings
	 * 2) All strings sent are same length & similar
	 * 3) The user is unlikely to type the first few chars of
	 *    one of these strings very fast.
	 * Note: some code has been fixed up since the above was laid out,
	 * so conditions 1 & 2 are probably not required anymore.
	 * However, this hasn't been tested with any first char
	 * that means anything else except escape.
	 */
#ifdef MDEBUG
	if (trace)
		fprintf(trace,"map(%c): ",c);
#endif
	/*
	 * If c==0, the char came from getesc typing escape.  Pass it through
	 * unchanged.  0 messes up the following code anyway.
	 */
	if (c==0)
		return(0);

	b[0] = c;
	b[1] = 0;
	for (d=0; maps[d].mapto; d++) {
#ifdef MDEBUG
		if (trace)
			fprintf(trace,"\ntry '%s', ",maps[d].cap);
#endif
		if ((p = maps[d].cap)) {
			for (q=b; *p; p++, q++) {
#ifdef MDEBUG
				if (trace)
					fprintf(trace,"q->b[%d], ",q-b);
#endif
				if (*q==0) {
					/*
					 * Is there another char waiting?
					 *
					 * This test is oversimplified, but
					 * should work mostly. It handles the
					 * case where we get an ESCAPE that
					 * wasn't part of a keypad string.
					 */
					if ((c=='#' ? peekkey() : fastpeekkey()) == 0) {
#ifdef MDEBUG
						if (trace)
							fprintf(trace,"fpk=0: return '%c'",c);
#endif
						/*
						 * Nothing waiting.  Push back
						 * what we peeked at & return
						 * failure (c).
						 *
						 * We want to be able to undo
						 * commands, but it's nonsense
						 * to undo part of an insertion
						 * so if in input mode don't.
						 */
						macpush(&b[1],maps == arrows);
						return(c);
					}
					*q = getkey();
					q[1] = 0;
				}
				if (*p != *q)
					goto contin;
			}
			macpush(maps[d].mapto,maps == arrows);
			c = getkey();
#ifdef MDEBUG
			if (trace)
				fprintf(trace,"Success: push(%s), return %c",maps[d].mapto, c);
#endif
			return(c);	/* first char of map string */
			contin:;
		}
	}
#ifdef MDEBUG
	if (trace)
		fprintf(trace,"Fail: push(%s), return %c", &b[1], c);
#endif
	macpush(&b[1],0);
	return(c);
}