905 lines
24 KiB
C
905 lines
24 KiB
C
/* $OpenBSD: vs_refresh.c,v 1.24 2024/04/24 15:15:40 job Exp $ */
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/*-
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* Copyright (c) 1992, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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* Copyright (c) 1992, 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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#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 <libgen.h>
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#include <limits.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 "../common/common.h"
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#include "vi.h"
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#define UPDATE_CURSOR 0x01 /* Update the cursor. */
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#define UPDATE_SCREEN 0x02 /* Flush to screen. */
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static void vs_modeline(SCR *);
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static int vs_paint(SCR *, u_int);
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/*
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* v_repaint --
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* Repaint selected lines from the screen.
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*
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* PUBLIC: int vs_repaint(SCR *, EVENT *);
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*/
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int
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vs_repaint(SCR *sp, EVENT *evp)
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{
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SMAP *smp;
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for (; evp->e_flno <= evp->e_tlno; ++evp->e_flno) {
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smp = HMAP + evp->e_flno - 1;
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SMAP_FLUSH(smp);
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if (vs_line(sp, smp, NULL, NULL))
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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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* vs_refresh --
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* Refresh all screens.
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*
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* PUBLIC: int vs_refresh(SCR *, int);
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*/
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int
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vs_refresh(SCR *sp, int forcepaint)
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{
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GS *gp;
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SCR *tsp;
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int need_refresh;
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u_int priv_paint, pub_paint;
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gp = sp->gp;
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/*
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* 1: Refresh the screen.
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*
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* If SC_SCR_REDRAW is set in the current screen, repaint everything
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* that we can find, including status lines.
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*/
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if (F_ISSET(sp, SC_SCR_REDRAW))
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TAILQ_FOREACH(tsp, &gp->dq, q)
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if (tsp != sp)
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F_SET(tsp, SC_SCR_REDRAW | SC_STATUS);
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/*
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* 2: Related or dirtied screens, or screens with messages.
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*
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* If related screens share a view into a file, they may have been
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* modified as well. Refresh any screens that aren't exiting that
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* have paint or dirty bits set. Always update their screens, we
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* are not likely to get another chance. Finally, if we refresh any
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* screens other than the current one, the cursor will be trashed.
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*/
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pub_paint = SC_SCR_REFORMAT | SC_SCR_REDRAW;
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priv_paint = VIP_CUR_INVALID | VIP_N_REFRESH;
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if (O_ISSET(sp, O_NUMBER))
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priv_paint |= VIP_N_RENUMBER;
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TAILQ_FOREACH(tsp, &gp->dq, q)
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if (tsp != sp && !F_ISSET(tsp, SC_EXIT | SC_EXIT_FORCE) &&
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(F_ISSET(tsp, pub_paint) ||
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F_ISSET(VIP(tsp), priv_paint))) {
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(void)vs_paint(tsp,
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(F_ISSET(VIP(tsp), VIP_CUR_INVALID) ?
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UPDATE_CURSOR : 0) | UPDATE_SCREEN);
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F_SET(VIP(sp), VIP_CUR_INVALID);
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}
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/*
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* 3: Refresh the current screen.
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*
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* Always refresh the current screen, it may be a cursor movement.
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* Also, always do it last -- that way, SC_SCR_REDRAW can be set
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* in the current screen only, and the screen won't flash.
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*/
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if (vs_paint(sp, UPDATE_CURSOR | (!forcepaint &&
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F_ISSET(sp, SC_SCR_VI) && KEYS_WAITING(sp) ? 0 : UPDATE_SCREEN)))
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return (1);
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/*
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* 4: Paint any missing status lines.
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*
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* XXX
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* This is fairly evil. Status lines are written using the vi message
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* mechanism, since we have no idea how long they are. Since we may be
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* painting screens other than the current one, we don't want to make
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* the user wait. We depend heavily on there not being any other lines
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* currently waiting to be displayed and the message truncation code in
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* the msgq_status routine working.
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*
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* And, finally, if we updated any status lines, make sure the cursor
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* gets back to where it belongs.
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*/
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need_refresh = 0;
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TAILQ_FOREACH(tsp, &gp->dq, q)
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if (F_ISSET(tsp, SC_STATUS)) {
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need_refresh = 1;
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vs_resolve(tsp, sp, 0);
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}
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if (need_refresh)
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(void)gp->scr_refresh(sp, 0);
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/*
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* A side-effect of refreshing the screen is that it's now ready
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* for everything else, i.e. messages.
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*/
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F_SET(sp, SC_SCR_VI);
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return (0);
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}
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/*
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* vs_paint --
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* This is the guts of the vi curses screen code. The idea is that
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* the SCR structure passed in contains the new coordinates of the
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* screen. What makes this hard is that we don't know how big
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* characters are, doing input can put the cursor in illegal places,
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* and we're frantically trying to avoid repainting unless it's
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* absolutely necessary. If you change this code, you'd better know
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* what you're doing. It's subtle and quick to anger.
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*/
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static int
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vs_paint(SCR *sp, u_int flags)
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{
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GS *gp;
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SMAP *smp, tmp;
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VI_PRIVATE *vip;
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recno_t lastline, lcnt;
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size_t cwtotal, cnt, len, notused, off, y;
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int ch = 0, didpaint, isempty, leftright_warp;
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char *p;
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#define LNO sp->lno /* Current file line. */
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#define OLNO vip->olno /* Remembered file line. */
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#define CNO sp->cno /* Current file column. */
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#define OCNO vip->ocno /* Remembered file column. */
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#define SCNO vip->sc_col /* Current screen column. */
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gp = sp->gp;
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vip = VIP(sp);
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didpaint = leftright_warp = 0;
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/*
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* 5: Reformat the lines.
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*
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* If the lines themselves have changed (:set list, for example),
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* fill in the map from scratch. Adjust the screen that's being
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* displayed if the leftright flag is set.
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*/
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if (F_ISSET(sp, SC_SCR_REFORMAT)) {
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/* Invalidate the line size cache. */
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VI_SCR_CFLUSH(vip);
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/* Toss vs_line() cached information. */
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if (F_ISSET(sp, SC_SCR_TOP)) {
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if (vs_sm_fill(sp, LNO, P_TOP))
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return (1);
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}
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else if (F_ISSET(sp, SC_SCR_CENTER)) {
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if (vs_sm_fill(sp, LNO, P_MIDDLE))
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return (1);
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} else {
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if (LNO == HMAP->lno || LNO == TMAP->lno) {
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cnt = vs_screens(sp, LNO, &CNO);
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if (LNO == HMAP->lno && cnt < HMAP->soff)
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HMAP->soff = cnt;
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if (LNO == TMAP->lno && cnt > TMAP->soff)
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TMAP->soff = cnt;
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}
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if (vs_sm_fill(sp, OOBLNO, P_TOP))
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return (1);
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}
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F_SET(sp, SC_SCR_REDRAW);
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}
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/*
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* 6: Line movement.
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*
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* Line changes can cause the top line to change as well. As
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* before, if the movement is large, the screen is repainted.
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*
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* 6a: Small screens.
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*
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* Users can use the window, w300, w1200 and w9600 options to make
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* the screen artificially small. The behavior of these options
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* in the historic vi wasn't all that consistent, and, in fact, it
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* was never documented how various screen movements affected the
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* screen size. Generally, one of three things would happen:
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* 1: The screen would expand in size, showing the line
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* 2: The screen would scroll, showing the line
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* 3: The screen would compress to its smallest size and
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* repaint.
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* In general, scrolling didn't cause compression (200^D was handled
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* the same as ^D), movement to a specific line would (:N where N
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* was 1 line below the screen caused a screen compress), and cursor
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* movement would scroll if it was 11 lines or less, and compress if
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* it was more than 11 lines. (And, no, I have no idea where the 11
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* comes from.)
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*
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* What we do is try and figure out if the line is less than half of
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* a full screen away. If it is, we expand the screen if there's
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* room, and then scroll as necessary. The alternative is to compress
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* and repaint.
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*
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* !!!
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* This code is a special case from beginning to end. Unfortunately,
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* home modems are still slow enough that it's worth having.
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*
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* XXX
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* If the line a really long one, i.e. part of the line is on the
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* screen but the column offset is not, we'll end up in the adjust
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* code, when we should probably have compressed the screen.
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*/
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if (IS_SMALL(sp)) {
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if (LNO < HMAP->lno) {
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lcnt = vs_sm_nlines(sp, HMAP, LNO, sp->t_maxrows);
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if (lcnt <= HALFSCREEN(sp))
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for (; lcnt && sp->t_rows != sp->t_maxrows;
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--lcnt, ++sp->t_rows) {
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++TMAP;
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if (vs_sm_1down(sp))
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return (1);
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}
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else
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goto small_fill;
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} else if (LNO > TMAP->lno) {
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lcnt = vs_sm_nlines(sp, TMAP, LNO, sp->t_maxrows);
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if (lcnt <= HALFSCREEN(sp))
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for (; lcnt && sp->t_rows != sp->t_maxrows;
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--lcnt, ++sp->t_rows) {
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if (vs_sm_next(sp, TMAP, TMAP + 1))
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return (1);
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++TMAP;
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if (vs_line(sp, TMAP, NULL, NULL))
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return (1);
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}
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else {
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small_fill: (void)gp->scr_move(sp, LASTLINE(sp), 0);
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(void)gp->scr_clrtoeol(sp);
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for (; sp->t_rows > sp->t_minrows;
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--sp->t_rows, --TMAP) {
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(void)gp->scr_move(sp, TMAP - HMAP, 0);
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(void)gp->scr_clrtoeol(sp);
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}
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if (vs_sm_fill(sp, LNO, P_FILL))
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return (1);
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F_SET(sp, SC_SCR_REDRAW);
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goto adjust;
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}
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}
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}
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/*
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* 6b: Line down, or current screen.
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*/
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if (LNO >= HMAP->lno) {
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/* Current screen. */
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if (LNO <= TMAP->lno)
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goto adjust;
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if (F_ISSET(sp, SC_SCR_TOP))
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goto top;
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if (F_ISSET(sp, SC_SCR_CENTER))
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goto middle;
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/*
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* If less than half a screen above the line, scroll down
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* until the line is on the screen.
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*/
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lcnt = vs_sm_nlines(sp, TMAP, LNO, HALFTEXT(sp));
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if (lcnt < HALFTEXT(sp)) {
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while (lcnt--)
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if (vs_sm_1up(sp))
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return (1);
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goto adjust;
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}
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goto bottom;
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}
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/*
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* 6c: If not on the current screen, may request center or top.
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*/
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if (F_ISSET(sp, SC_SCR_TOP))
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goto top;
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if (F_ISSET(sp, SC_SCR_CENTER))
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goto middle;
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/*
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* 6d: Line up.
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*/
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lcnt = vs_sm_nlines(sp, HMAP, LNO, HALFTEXT(sp));
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if (lcnt < HALFTEXT(sp)) {
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/*
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* If less than half a screen below the line, scroll up until
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* the line is the first line on the screen. Special check so
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* that if the screen has been emptied, we refill it.
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*/
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if (db_exist(sp, HMAP->lno)) {
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while (lcnt--)
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if (vs_sm_1down(sp))
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return (1);
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goto adjust;
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}
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/*
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* If less than a half screen from the bottom of the file,
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* put the last line of the file on the bottom of the screen.
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*/
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bottom: if (db_last(sp, &lastline))
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return (1);
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tmp.lno = LNO;
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tmp.coff = HMAP->coff;
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tmp.soff = 1;
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lcnt = vs_sm_nlines(sp, &tmp, lastline, sp->t_rows);
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if (lcnt < HALFTEXT(sp)) {
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if (vs_sm_fill(sp, lastline, P_BOTTOM))
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return (1);
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F_SET(sp, SC_SCR_REDRAW);
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goto adjust;
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}
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/* It's not close, just put the line in the middle. */
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goto middle;
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}
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/*
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* If less than half a screen from the top of the file, put the first
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* line of the file at the top of the screen. Otherwise, put the line
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* in the middle of the screen.
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*/
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tmp.lno = 1;
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tmp.coff = HMAP->coff;
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tmp.soff = 1;
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lcnt = vs_sm_nlines(sp, &tmp, LNO, HALFTEXT(sp));
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if (lcnt < HALFTEXT(sp)) {
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if (vs_sm_fill(sp, 1, P_TOP))
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return (1);
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} else
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middle: if (vs_sm_fill(sp, LNO, P_MIDDLE))
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return (1);
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if (0) {
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top: if (vs_sm_fill(sp, LNO, P_TOP))
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return (1);
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}
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F_SET(sp, SC_SCR_REDRAW);
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/*
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* At this point we know part of the line is on the screen. Since
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* scrolling is done using logical lines, not physical, all of the
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* line may not be on the screen. While that's not necessarily bad,
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* if the part the cursor is on isn't there, we're going to lose.
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* This can be tricky; if the line covers the entire screen, lno
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* may be the same as both ends of the map, that's why we test BOTH
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* the top and the bottom of the map. This isn't a problem for
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* left-right scrolling, the cursor movement code handles the problem.
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*
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* There's a performance issue here if editing *really* long lines.
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* This gets to the right spot by scrolling, and, in a binary, by
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* scrolling hundreds of lines. If the adjustment looks like it's
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* going to be a serious problem, refill the screen and repaint.
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*/
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adjust: if (!O_ISSET(sp, O_LEFTRIGHT) &&
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(LNO == HMAP->lno || LNO == TMAP->lno)) {
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cnt = vs_screens(sp, LNO, &CNO);
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if (LNO == HMAP->lno && cnt < HMAP->soff) {
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if ((HMAP->soff - cnt) > HALFTEXT(sp)) {
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HMAP->soff = cnt;
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vs_sm_fill(sp, OOBLNO, P_TOP);
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F_SET(sp, SC_SCR_REDRAW);
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} else
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while (cnt < HMAP->soff)
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if (vs_sm_1down(sp))
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return (1);
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}
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if (LNO == TMAP->lno && cnt > TMAP->soff) {
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if ((cnt - TMAP->soff) > HALFTEXT(sp)) {
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TMAP->soff = cnt;
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vs_sm_fill(sp, OOBLNO, P_BOTTOM);
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F_SET(sp, SC_SCR_REDRAW);
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} else
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while (cnt > TMAP->soff)
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if (vs_sm_1up(sp))
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return (1);
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}
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}
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|
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/*
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* If the screen needs to be repainted, skip cursor optimization.
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* However, in the code above we skipped leftright scrolling on
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* the grounds that the cursor code would handle it. Make sure
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* the right screen is up.
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*/
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if (F_ISSET(sp, SC_SCR_REDRAW)) {
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if (O_ISSET(sp, O_LEFTRIGHT))
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goto slow;
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goto paint;
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}
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|
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/*
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* 7: Cursor movements (current screen only).
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*/
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if (!LF_ISSET(UPDATE_CURSOR))
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goto number;
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/*
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* Decide cursor position. If the line has changed, the cursor has
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* moved over a tab, or don't know where the cursor was, reparse the
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* line. Otherwise, we've just moved over fixed-width characters,
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* and can calculate the left/right scrolling and cursor movement
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* without reparsing the line. Note that we don't know which (if any)
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* of the characters between the old and new cursor positions changed.
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*
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* XXX
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* With some work, it should be possible to handle tabs quickly, at
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* least in obvious situations, like moving right and encountering
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* a tab, without reparsing the whole line.
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*
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* If the line we're working with has changed, reread it..
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*/
|
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if (F_ISSET(vip, VIP_CUR_INVALID) || LNO != OLNO)
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goto slow;
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|
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/* Otherwise, if nothing's changed, ignore the cursor. */
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if (CNO == OCNO)
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goto fast;
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|
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/*
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* Get the current line. If this fails, we either have an empty
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* file and can just repaint, or there's a real problem. This
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* isn't a performance issue because there aren't any ways to get
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* here repeatedly.
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*/
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if (db_eget(sp, LNO, &p, &len, &isempty)) {
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if (isempty)
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goto slow;
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return (1);
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}
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|
|
#ifdef DEBUG
|
|
/* Sanity checking. */
|
|
if (CNO >= len && len != 0) {
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msgq(sp, M_ERR, "Error: %s/%d: cno (%u) >= len (%u)",
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basename(__FILE__), __LINE__, CNO, len);
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return (1);
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}
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|
#endif
|
|
/*
|
|
* The basic scheme here is to look at the characters in between
|
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* the old and new positions and decide how big they are on the
|
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* screen, and therefore, how many screen positions to move.
|
|
*/
|
|
if (CNO < OCNO) {
|
|
/*
|
|
* 7a: Cursor moved left.
|
|
*
|
|
* Point to the old character. The old cursor position can
|
|
* be past EOL if, for example, we just deleted the rest of
|
|
* the line. In this case, since we don't know the width of
|
|
* the characters we traversed, we have to do it slowly.
|
|
*/
|
|
p += OCNO;
|
|
cnt = (OCNO - CNO) + 1;
|
|
if (OCNO >= len)
|
|
goto slow;
|
|
|
|
/*
|
|
* Quick sanity check -- it's hard to figure out exactly when
|
|
* we cross a screen boundary as we do in the cursor right
|
|
* movement. If cnt is so large that we're going to cross the
|
|
* boundary no matter what, stop now.
|
|
*/
|
|
if (SCNO + 1 + MAX_CHARACTER_COLUMNS < cnt)
|
|
goto slow;
|
|
|
|
/*
|
|
* Count up the widths of the characters. If it's a tab
|
|
* character, go do it the slow way.
|
|
*/
|
|
for (cwtotal = 0; cnt--; cwtotal += KEY_LEN(sp, ch))
|
|
if ((ch = *(u_char *)p--) == '\t')
|
|
goto slow;
|
|
|
|
/*
|
|
* Decrement the screen cursor by the total width of the
|
|
* characters minus 1.
|
|
*/
|
|
cwtotal -= 1;
|
|
|
|
/*
|
|
* If we're moving left, and there's a wide character in the
|
|
* current position, go to the end of the character.
|
|
*/
|
|
if (KEY_LEN(sp, ch) > 1)
|
|
cwtotal -= KEY_LEN(sp, ch) - 1;
|
|
|
|
/*
|
|
* If the new column moved us off of the current logical line,
|
|
* calculate a new one. If doing leftright scrolling, we've
|
|
* moved off of the current screen, as well.
|
|
*/
|
|
if (SCNO < cwtotal)
|
|
goto slow;
|
|
SCNO -= cwtotal;
|
|
} else {
|
|
/*
|
|
* 7b: Cursor moved right.
|
|
*
|
|
* Point to the first character to the right.
|
|
*/
|
|
p += OCNO + 1;
|
|
cnt = CNO - OCNO;
|
|
|
|
/*
|
|
* Count up the widths of the characters. If it's a tab
|
|
* character, go do it the slow way. If we cross a
|
|
* screen boundary, we can quit.
|
|
*/
|
|
for (cwtotal = SCNO; cnt--;) {
|
|
if ((ch = *(u_char *)p++) == '\t')
|
|
goto slow;
|
|
if ((cwtotal += KEY_LEN(sp, ch)) >= SCREEN_COLS(sp))
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Increment the screen cursor by the total width of the
|
|
* characters.
|
|
*/
|
|
SCNO = cwtotal;
|
|
|
|
/* See screen change comment in section 6a. */
|
|
if (SCNO >= SCREEN_COLS(sp))
|
|
goto slow;
|
|
}
|
|
|
|
/*
|
|
* 7c: Fast cursor update.
|
|
*
|
|
* We have the current column, retrieve the current row.
|
|
*/
|
|
fast: (void)gp->scr_cursor(sp, &y, ¬used);
|
|
goto done_cursor;
|
|
|
|
/*
|
|
* 7d: Slow cursor update.
|
|
*
|
|
* Walk through the map and find the current line.
|
|
*/
|
|
slow: for (smp = HMAP; smp->lno != LNO; ++smp);
|
|
|
|
/*
|
|
* 7e: Leftright scrolling adjustment.
|
|
*
|
|
* If doing left-right scrolling and the cursor movement has changed
|
|
* the displayed screen, scroll the screen left or right, unless we're
|
|
* updating the info line in which case we just scroll that one line.
|
|
* We adjust the offset up or down until we have a window that covers
|
|
* the current column, making sure that we adjust differently for the
|
|
* first screen as compared to subsequent ones.
|
|
*/
|
|
if (O_ISSET(sp, O_LEFTRIGHT)) {
|
|
/*
|
|
* Get the screen column for this character, and correct
|
|
* for the number option offset.
|
|
*/
|
|
cnt = vs_columns(sp, NULL, LNO, &CNO, NULL);
|
|
if (O_ISSET(sp, O_NUMBER))
|
|
cnt -= O_NUMBER_LENGTH;
|
|
|
|
/* Adjust the window towards the beginning of the line. */
|
|
off = smp->coff;
|
|
if (off >= cnt) {
|
|
do {
|
|
if (off >= O_VAL(sp, O_SIDESCROLL))
|
|
off -= O_VAL(sp, O_SIDESCROLL);
|
|
else {
|
|
off = 0;
|
|
break;
|
|
}
|
|
} while (off >= cnt);
|
|
goto shifted;
|
|
}
|
|
|
|
/* Adjust the window towards the end of the line. */
|
|
if ((off == 0 && off + SCREEN_COLS(sp) < cnt) ||
|
|
(off != 0 && off + sp->cols < cnt)) {
|
|
do {
|
|
off += O_VAL(sp, O_SIDESCROLL);
|
|
} while (off + sp->cols < cnt);
|
|
|
|
shifted: /* Fill in screen map with the new offset. */
|
|
if (F_ISSET(sp, SC_TINPUT_INFO))
|
|
smp->coff = off;
|
|
else {
|
|
for (smp = HMAP; smp <= TMAP; ++smp)
|
|
smp->coff = off;
|
|
leftright_warp = 1;
|
|
}
|
|
goto paint;
|
|
}
|
|
|
|
/*
|
|
* We may have jumped here to adjust a leftright screen because
|
|
* redraw was set. If so, we have to paint the entire screen.
|
|
*/
|
|
if (F_ISSET(sp, SC_SCR_REDRAW))
|
|
goto paint;
|
|
}
|
|
|
|
/*
|
|
* Update the screen lines for this particular file line until we
|
|
* have a new screen cursor position.
|
|
*/
|
|
for (y = -1,
|
|
vip->sc_smap = NULL; smp <= TMAP && smp->lno == LNO; ++smp) {
|
|
if (vs_line(sp, smp, &y, &SCNO))
|
|
return (1);
|
|
if (y != -1) {
|
|
vip->sc_smap = smp;
|
|
break;
|
|
}
|
|
}
|
|
goto done_cursor;
|
|
|
|
/*
|
|
* 8: Repaint the entire screen.
|
|
*
|
|
* Lost big, do what you have to do. We flush the cache, since
|
|
* SC_SCR_REDRAW gets set when the screen isn't worth fixing, and
|
|
* it's simpler to repaint. So, don't trust anything that we
|
|
* think we know about it.
|
|
*/
|
|
paint: for (smp = HMAP; smp <= TMAP; ++smp)
|
|
SMAP_FLUSH(smp);
|
|
for (y = -1, vip->sc_smap = NULL, smp = HMAP; smp <= TMAP; ++smp) {
|
|
if (vs_line(sp, smp, &y, &SCNO))
|
|
return (1);
|
|
if (y != -1 && vip->sc_smap == NULL)
|
|
vip->sc_smap = smp;
|
|
}
|
|
/*
|
|
* If it's a small screen and we're redrawing, clear the unused lines,
|
|
* ex may have overwritten them.
|
|
*/
|
|
if (F_ISSET(sp, SC_SCR_REDRAW) && IS_SMALL(sp))
|
|
for (cnt = sp->t_rows; cnt <= sp->t_maxrows; ++cnt) {
|
|
(void)gp->scr_move(sp, cnt, 0);
|
|
(void)gp->scr_clrtoeol(sp);
|
|
}
|
|
|
|
didpaint = 1;
|
|
|
|
done_cursor:
|
|
/*
|
|
* Sanity checking. When the repainting code messes up, the usual
|
|
* result is we don't repaint the cursor and so sc_smap will be
|
|
* NULL. If we're debugging, die, otherwise restart from scratch.
|
|
*/
|
|
#ifdef DEBUG
|
|
if (vip->sc_smap == NULL)
|
|
abort();
|
|
#else
|
|
if (vip->sc_smap == NULL) {
|
|
if (F_ISSET(sp, SC_SCR_REFORMAT))
|
|
return (0);
|
|
F_SET(sp, SC_SCR_REFORMAT);
|
|
return (vs_paint(sp, flags));
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* 9: Set the remembered cursor values.
|
|
*/
|
|
OCNO = CNO;
|
|
OLNO = LNO;
|
|
|
|
/*
|
|
* 10: Repaint the line numbers.
|
|
*
|
|
* If O_NUMBER is set and the VIP_N_RENUMBER bit is set, and we
|
|
* didn't repaint the screen, repaint all of the line numbers,
|
|
* they've changed.
|
|
*/
|
|
number: if (O_ISSET(sp, O_NUMBER) &&
|
|
F_ISSET(vip, VIP_N_RENUMBER) && !didpaint && vs_number(sp))
|
|
return (1);
|
|
|
|
/*
|
|
* 11: Update the mode line, position the cursor, and flush changes.
|
|
*
|
|
* If we warped the screen, we have to refresh everything.
|
|
*/
|
|
if (leftright_warp)
|
|
LF_SET(UPDATE_CURSOR | UPDATE_SCREEN);
|
|
|
|
if (LF_ISSET(UPDATE_SCREEN) && !IS_ONELINE(sp) &&
|
|
!F_ISSET(vip, VIP_S_MODELINE) && !F_ISSET(sp, SC_TINPUT_INFO))
|
|
vs_modeline(sp);
|
|
|
|
if (LF_ISSET(UPDATE_CURSOR)) {
|
|
(void)gp->scr_move(sp, y, SCNO);
|
|
|
|
/*
|
|
* XXX
|
|
* If the screen shifted, we recalculate the "most favorite"
|
|
* cursor position. Vi won't know that we've warped the
|
|
* screen, so it's going to have a wrong idea about where the
|
|
* cursor should be. This is vi's problem, and fixing it here
|
|
* is a gross layering violation.
|
|
*/
|
|
if (leftright_warp)
|
|
(void)vs_column(sp, &sp->rcm);
|
|
}
|
|
|
|
if (LF_ISSET(UPDATE_SCREEN))
|
|
(void)gp->scr_refresh(sp, F_ISSET(vip, VIP_N_EX_PAINT));
|
|
|
|
/* 12: Clear the flags that are handled by this routine. */
|
|
F_CLR(sp, SC_SCR_CENTER | SC_SCR_REDRAW | SC_SCR_REFORMAT | SC_SCR_TOP);
|
|
F_CLR(vip, VIP_CUR_INVALID |
|
|
VIP_N_EX_PAINT | VIP_N_REFRESH | VIP_N_RENUMBER | VIP_S_MODELINE);
|
|
|
|
return (0);
|
|
|
|
#undef LNO
|
|
#undef OLNO
|
|
#undef CNO
|
|
#undef OCNO
|
|
#undef SCNO
|
|
}
|
|
|
|
/*
|
|
* vs_modeline --
|
|
* Update the mode line.
|
|
*/
|
|
static void
|
|
vs_modeline(SCR *sp)
|
|
{
|
|
static char * const modes[] = {
|
|
"Append", /* SM_APPEND */
|
|
"Change", /* SM_CHANGE */
|
|
"Command", /* SM_COMMAND */
|
|
"Insert", /* SM_INSERT */
|
|
"Replace", /* SM_REPLACE */
|
|
};
|
|
GS *gp;
|
|
size_t cols, curcol, curlen, endpoint, len, midpoint;
|
|
const char *t = NULL;
|
|
int ellipsis;
|
|
char *p, buf[20];
|
|
recno_t last;
|
|
|
|
/*
|
|
* It's possible that this routine will be called after sp->frp
|
|
* has been set to NULL by file_end(). We return immediately
|
|
* to avoid a SEGV.
|
|
*/
|
|
if (sp->frp == NULL)
|
|
return;
|
|
|
|
gp = sp->gp;
|
|
|
|
/*
|
|
* We put down the file name, the ruler, the mode and the dirty flag.
|
|
* If there's not enough room, there's not enough room, we don't play
|
|
* any special games. We try to put the ruler in the middle and the
|
|
* mode and dirty flag at the end.
|
|
*
|
|
* !!!
|
|
* Leave the last character blank, in case it's a really dumb terminal
|
|
* with hardware scroll. Second, don't paint the last character in the
|
|
* screen, SunOS 4.1.1 and Ultrix 4.2 curses won't let you.
|
|
*
|
|
* Move to the last line on the screen.
|
|
*/
|
|
(void)gp->scr_move(sp, LASTLINE(sp), 0);
|
|
|
|
/* If more than one screen in the display, show the file name. */
|
|
curlen = 0;
|
|
if (IS_SPLIT(sp) || O_ISSET(sp, O_SHOWFILENAME)) {
|
|
for (p = sp->frp->name; *p != '\0'; ++p);
|
|
for (ellipsis = 0, cols = sp->cols / 2; --p > sp->frp->name;) {
|
|
if (*p == '/') {
|
|
++p;
|
|
break;
|
|
}
|
|
if ((curlen += KEY_LEN(sp, *p)) > cols) {
|
|
ellipsis = 3;
|
|
curlen +=
|
|
KEY_LEN(sp, '.') * 3 + KEY_LEN(sp, ' ');
|
|
while (curlen > cols) {
|
|
++p;
|
|
curlen -= KEY_LEN(sp, *p);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
if (ellipsis) {
|
|
while (ellipsis--)
|
|
(void)gp->scr_addstr(sp,
|
|
KEY_NAME(sp, '.'), KEY_LEN(sp, '.'));
|
|
(void)gp->scr_addstr(sp,
|
|
KEY_NAME(sp, ' '), KEY_LEN(sp, ' '));
|
|
}
|
|
for (; *p != '\0'; ++p)
|
|
(void)gp->scr_addstr(sp,
|
|
KEY_NAME(sp, *p), KEY_LEN(sp, *p));
|
|
}
|
|
|
|
/* Clear the rest of the line. */
|
|
(void)gp->scr_clrtoeol(sp);
|
|
|
|
/*
|
|
* Display the ruler. If we're not at the midpoint yet, move there.
|
|
* Otherwise, add in two extra spaces.
|
|
*
|
|
* Adjust the current column for the fact that the editor uses it as
|
|
* a zero-based number.
|
|
*
|
|
* XXX
|
|
* Assume that numbers, commas, and spaces only take up a single
|
|
* column on the screen.
|
|
*/
|
|
cols = sp->cols - 1;
|
|
if (O_ISSET(sp, O_RULER)) {
|
|
vs_column(sp, &curcol);
|
|
|
|
if (db_last(sp, &last))
|
|
len = snprintf(buf, sizeof(buf), "%lu,%zu",
|
|
(ulong)sp->lno, curcol + 1);
|
|
else
|
|
len = snprintf(buf, sizeof(buf), "%lu,%zu %lu%%",
|
|
(ulong)sp->lno, curcol + 1,
|
|
(unsigned long)(sp->lno * 100) / last);
|
|
|
|
midpoint = (cols - ((len + 1) / 2)) / 2;
|
|
if (curlen < midpoint) {
|
|
(void)gp->scr_move(sp, LASTLINE(sp), midpoint);
|
|
curlen += len;
|
|
} else if (curlen + 2 + len < cols) {
|
|
(void)gp->scr_addstr(sp, " ", 2);
|
|
curlen += 2 + len;
|
|
}
|
|
(void)gp->scr_addstr(sp, buf, len);
|
|
}
|
|
|
|
/*
|
|
* Display the mode and the modified flag, as close to the end of the
|
|
* line as possible, but guaranteeing at least two spaces between the
|
|
* ruler and the modified flag.
|
|
*/
|
|
#define MODESIZE 9
|
|
endpoint = cols;
|
|
if (O_ISSET(sp, O_SHOWMODE)) {
|
|
if (F_ISSET(sp->ep, F_MODIFIED))
|
|
--endpoint;
|
|
t = modes[sp->showmode];
|
|
endpoint -= (len = strlen(t));
|
|
}
|
|
|
|
if (endpoint > curlen + 2) {
|
|
(void)gp->scr_move(sp, LASTLINE(sp), endpoint);
|
|
if (O_ISSET(sp, O_SHOWMODE)) {
|
|
if (F_ISSET(sp->ep, F_MODIFIED))
|
|
(void)gp->scr_addstr(sp,
|
|
KEY_NAME(sp, '*'), KEY_LEN(sp, '*'));
|
|
(void)gp->scr_addstr(sp, t, len);
|
|
}
|
|
}
|
|
}
|