337 lines
8.5 KiB
C
337 lines
8.5 KiB
C
/*-
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* Copyright (c) 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char sccsid[] = "@(#)svi_screen.c 8.94 (Berkeley) 8/17/94";
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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 <errno.h>
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#include <limits.h>
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#include <signal.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 <termios.h>
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#include <unistd.h>
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#include "compat.h"
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#include <curses.h>
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#include <db.h>
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#include <regex.h>
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#include "vi.h"
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#include "../vi/vcmd.h"
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#include "svi_screen.h"
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#include "../sex/sex_screen.h"
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/*
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* svi_screen_init --
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* Initialize a screen.
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*/
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int
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svi_screen_init(sp)
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SCR *sp;
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{
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/* Initialize support routines. */
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sp->s_bell = svi_bell;
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sp->s_bg = svi_bg;
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sp->s_busy = svi_busy;
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sp->s_change = svi_change;
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sp->s_clear = svi_clear;
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sp->s_colpos = svi_cm_public;
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sp->s_column = svi_column;
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sp->s_confirm = svi_confirm;
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sp->s_crel = svi_crel;
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sp->s_edit = svi_screen_edit;
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sp->s_end = svi_screen_end;
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sp->s_ex_cmd = svi_ex_cmd;
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sp->s_ex_run = svi_ex_run;
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sp->s_ex_write = svi_ex_write;
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sp->s_fg = svi_fg;
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sp->s_fill = svi_sm_fill;
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sp->s_get = svi_get;
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sp->s_key_read = sex_key_read;
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sp->s_optchange = svi_optchange;
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sp->s_fmap = svi_fmap;
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sp->s_position = svi_sm_position;
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sp->s_rabs = svi_rabs;
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sp->s_rcm = svi_rcm;
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sp->s_refresh = svi_refresh;
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sp->s_scroll = svi_sm_scroll;
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sp->s_split = svi_split;
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sp->s_suspend = svi_suspend;
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sp->s_window = sex_window;
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return (0);
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}
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/*
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* svi_screen_copy --
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* Copy to a new screen.
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*/
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int
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svi_screen_copy(orig, sp)
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SCR *orig, *sp;
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{
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SVI_PRIVATE *osvi, *nsvi;
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/* Create the private screen structure. */
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CALLOC_RET(orig, nsvi, SVI_PRIVATE *, 1, sizeof(SVI_PRIVATE));
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sp->svi_private = nsvi;
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/* INITIALIZED AT SCREEN CREATE. */
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/* Invalidate the line size cache. */
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SVI_SCR_CFLUSH(nsvi);
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/* PARTIALLY OR COMPLETELY COPIED FROM PREVIOUS SCREEN. */
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if (orig == NULL) {
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} else {
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osvi = SVP(orig);
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nsvi->srows = osvi->srows;
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if (osvi->VB != NULL && (nsvi->VB = strdup(osvi->VB)) == NULL) {
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msgq(sp, M_SYSERR, NULL);
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return (1);
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}
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F_SET(nsvi, F_ISSET(osvi, SVI_CURSES_INIT));
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}
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return (0);
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}
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/*
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* svi_screen_end --
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* End a screen.
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*/
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int
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svi_screen_end(sp)
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SCR *sp;
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{
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SVI_PRIVATE *svp;
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svp = SVP(sp);
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/* Free the screen map. */
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if (HMAP != NULL)
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FREE(HMAP, SIZE_HMAP(sp) * sizeof(SMAP));
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/* Free the visual bell string. */
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if (svp->VB != NULL)
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free(svp->VB);
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/* Free private memory. */
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FREE(svp, sizeof(SVI_PRIVATE));
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sp->svi_private = NULL;
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return (0);
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}
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/*
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* We use a single curses "window" for each vi screen. The model would be
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* simpler with two windows (one for the text, and one for the modeline)
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* because scrolling the text window down would work correctly then, not
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* affecting the mode line. As it is we have to play games to make it look
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* right. The reason for this choice is that it would be difficult for
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* curses to optimize the movement, i.e. detect that the downward scroll
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* isn't going to change the modeline, set the scrolling region on the
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* terminal and only scroll the first part of the text window. (Even if
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* curses did detect it, the set-scrolling-region terminal commands can't
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* be used by curses because it's indeterminate where the cursor ends up
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* after they are sent.)
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*/
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/*
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* svi_screen_edit --
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* Main vi curses screen loop.
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*/
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int
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svi_screen_edit(sp, ep)
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SCR *sp;
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EXF *ep;
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{
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SCR *tsp;
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int ecurses, escreen, force, rval;
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escreen = ecurses = rval = 0;
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/* Initialize curses. */
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if (svi_curses_init(sp)) {
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escreen = 1;
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goto err;
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}
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ecurses = 1;
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/*
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* The resize bit is probably set, as a result of the terminal being
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* set. We clear it as we just finished initializing the screen.
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* However, we will want to fill in the map from scratch, so provide
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* a line number just in case, and set the reformat flag.
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*/
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HMAP->lno = 1;
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F_CLR(sp, S_RESIZE);
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F_SET(sp, S_REFORMAT);
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/*
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* The historic 4BSD curses had an uneasy relationship with termcap.
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* Termcap used a static buffer to hold the terminal information,
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* which was was then used by the curses functions. We want to use
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* it too, for lots of random things, but we've put it off until after
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* svi_curses_init:initscr() was called. Do it now.
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*/
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if (svi_term_init(sp))
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goto err;
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for (;;) {
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/* Reset the cursor. */
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F_SET(SVP(sp), SVI_CUR_INVALID);
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/*
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* Run vi. If vi fails, svi data structures may be
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* corrupted, be extremely careful what you free up.
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*/
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if (vi(sp, sp->ep)) {
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(void)rcv_sync(sp, sp->ep,
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RCV_EMAIL | RCV_ENDSESSION | RCV_PRESERVE);
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escreen = 1;
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goto err;
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}
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force = 0;
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switch (F_ISSET(sp, S_MAJOR_CHANGE)) {
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case S_EXIT_FORCE:
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force = 1;
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/* FALLTHROUGH */
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case S_EXIT:
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F_CLR(sp, S_EXIT_FORCE | S_EXIT);
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if (file_end(sp, sp->ep, force))/* File end. */
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break;
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/*
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* !!!
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* NB: sp->frp may now be NULL, if it was a tmp file.
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*/
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(void)svi_join(sp, &tsp); /* Find a new screen. */
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if (tsp == NULL)
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(void)svi_swap(sp, &tsp, NULL);
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if (tsp == NULL) {
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escreen = 1;
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goto ret;
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}
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(void)screen_end(sp); /* Screen end. */
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sp = tsp;
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break;
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case 0: /* Exit vi mode. */
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svi_dtoh(sp, "Exit from vi");
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goto ret;
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case S_FSWITCH: /* File switch. */
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F_CLR(sp, S_FSWITCH);
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F_SET(sp, S_REFORMAT);
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break;
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case S_SSWITCH: /* Screen switch. */
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F_CLR(sp, S_SSWITCH);
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sp = sp->nextdisp;
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break;
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default:
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abort();
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}
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}
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if (0) {
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err: rval = 1;
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}
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ret: if (svi_term_end(sp)) /* Terminal end (uses sp). */
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rval = 1;
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if (ecurses && svi_curses_end(sp)) /* Curses end (uses sp). */
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rval = 1;
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if (escreen && screen_end(sp)) /* Screen end. */
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rval = 1;
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return (rval);
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}
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/*
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* svi_crel --
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* Change the relative size of the current screen.
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*/
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int
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svi_crel(sp, count)
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SCR *sp;
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long count;
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{
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/* Can't grow beyond the size of the window. */
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if (count > O_VAL(sp, O_WINDOW))
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count = O_VAL(sp, O_WINDOW);
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sp->t_minrows = sp->t_rows = count;
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if (sp->t_rows > sp->rows - 1)
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sp->t_minrows = sp->t_rows = sp->rows - 1;
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TMAP = HMAP + (sp->t_rows - 1);
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F_SET(sp, S_REDRAW);
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return (0);
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}
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/*
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* svi_dtoh --
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* Move all but the current screen to the hidden queue.
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*/
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void
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svi_dtoh(sp, emsg)
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SCR *sp;
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char *emsg;
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{
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SCR *tsp;
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int hidden;
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for (hidden = 0;
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(tsp = sp->gp->dq.cqh_first) != (void *)&sp->gp->dq; ++hidden) {
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if (_HMAP(tsp) != NULL) {
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FREE(_HMAP(tsp), SIZE_HMAP(tsp) * sizeof(SMAP));
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_HMAP(tsp) = NULL;
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}
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SIGBLOCK(sp->gp);
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CIRCLEQ_REMOVE(&sp->gp->dq, tsp, q);
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CIRCLEQ_INSERT_TAIL(&sp->gp->hq, tsp, q);
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SIGUNBLOCK(sp->gp);
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}
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SIGBLOCK(sp->gp);
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CIRCLEQ_REMOVE(&sp->gp->hq, sp, q);
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CIRCLEQ_INSERT_TAIL(&sp->gp->dq, sp, q);
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SIGUNBLOCK(sp->gp);
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if (hidden > 1)
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msgq(sp, M_INFO,
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"%s backgrounded %d screens; use :display to list the screens",
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emsg, hidden - 1);
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}
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