536 lines
14 KiB
C
536 lines
14 KiB
C
/*-
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* Copyright (c) 1993
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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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/* from: static char sccsid[] = "@(#)svi_screen.c 8.57 (Berkeley) 1/9/94"; */
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static char *rcsid = "$Id: svi_screen.c,v 1.2 1994/01/24 06:41:17 cgd Exp $";
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#endif /* not lint */
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#include <sys/types.h>
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#include <curses.h>
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#include <errno.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 "vi.h"
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#include "vcmd.h"
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#include "excmd.h"
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#include "svi_screen.h"
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#include "sex/sex_screen.h"
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static void d_to_h __P((SCR *, char *));
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static int svi_initscr_kluge __P((SCR *, struct termios *));
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static void svi_keypad __P((SCR *, int));
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static void svi_keypad_pc __P((int));
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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_chposition = svi_chposition;
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sp->s_clear = svi_clear;
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sp->s_column = svi_column;
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sp->s_confirm = svi_confirm;
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sp->s_down = svi_sm_down;
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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_position = svi_sm_position;
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sp->s_rabs = svi_rabs;
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sp->s_refresh = svi_refresh;
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sp->s_relative = svi_relative;
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sp->s_rrel = svi_rrel;
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sp->s_split = svi_split;
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sp->s_suspend = svi_suspend;
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sp->s_up = svi_sm_up;
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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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/* Lose svi_screens() cached information. */
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nsvi->ss_lno = OOBLNO;
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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_NO_VBELL));
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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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int rval;
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rval = 0;
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/*
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* XXX
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* If this is the last screen, end curses
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* while we still have screen information.
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*/
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if (sp->q.cqe_prev == (void *)&sp->gp->dq &&
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sp->q.cqe_next == (void *)&sp->gp->dq &&
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sp->gp->hq.cqh_first == (void *)&sp->gp->hq &&
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svi_curses_end(sp))
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rval = 1;
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/* Free 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 visual bell string. */
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if (SVP(sp)->VB != NULL)
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FREE(SVP(sp)->VB, strlen(SVP(sp)->VB) + 1);
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/* Free private memory. */
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FREE(SVP(sp), sizeof(SVI_PRIVATE));
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sp->svi_private = NULL;
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return (rval);
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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 force;
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/* Get refresh to init curses. */
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F_SET(sp, S_RESIZE);
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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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if (F_ISSET(ep, F_RCV_ON)) {
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F_SET(ep, F_RCV_NORM);
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(void)rcv_sync(sp, sp->ep);
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}
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(void)file_end(sp, sp->ep, 1); /* End the file. */
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(void)svi_curses_end(sp); /* End curses. */
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(void)screen_end(sp); /* End the screen. */
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return (1);
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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))/* End the file. */
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break;
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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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(void)screen_end(sp); /* End the screen. */
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if ((sp = tsp) == NULL) /* Switch. */
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return (0);
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break;
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case 0: /* Exit vi mode. */
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(void)svi_curses_end(sp); /* End curses. */
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d_to_h(sp, "Exit from vi");
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return (0);
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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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/* NOTREACHED */
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}
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/*
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* svi_curses_init --
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* Initialize curses.
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*/
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int
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svi_curses_init(sp)
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SCR *sp;
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{
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struct termios t;
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int ixoff, ixon;
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char *p, kbuf[2048];
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/*
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* Vi wants raw mode, excepting flow control characters. Both
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* cbreak and raw modes have problems for us. In cbreak mode,
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* we have to turn all the signals off explicitly. In raw mode,
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* we have to turn flow control back on. Raw chosen for no strong
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* reason. In both cases we have to periodically turn various
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* signals on.
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*/
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if (tcgetattr(STDIN_FILENO, &t)) {
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msgq(sp, M_SYSERR, "tcgetattr");
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return (1);
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}
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ixon = t.c_iflag & IXON;
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ixoff = t.c_iflag & IXOFF;
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/*
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* The initscr() in SunOS curses flushes the terminal driver queue.
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* I have no idea if this stark raving insanity appears elsewhere,
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* but since the SunOS curses is likely derived from the System III
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* or System V versions, here's the workaround.
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*/
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if (svi_initscr_kluge(sp, &t))
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return (1);
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/*
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* Start the screen. Initscr() doesn't provide useful error values
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* or messages. Generally, either malloc failed or the terminal
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* was unknown or lacked some necesssary feature. Try and guess so
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* the user isn't even more pissed off because of the error message.
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*/
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errno = 0;
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if (initscr() == NULL) {
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if (errno)
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msgq(sp, M_SYSERR, "initscr failed");
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else
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msgq(sp, M_ERR, "Error: initscr failed.");
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if ((p = getenv("TERM")) == NULL)
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msgq(sp, M_ERR,
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"Error: no terminal environment variable set.");
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else if (tgetent(kbuf, p) != 1)
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msgq(sp, M_ERR,
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"Error: %s: unknown terminal type, or terminal lacking necessary features.", p);
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else
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msgq(sp, M_ERR,
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"Error: %s: terminal type lacking necessary features.", p);
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return (1);
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}
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/*
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* !!!
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* If raw isn't turning off echo and newlines, something's wrong.
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* However, just in case...
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*/
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noecho(); /* No character echo. */
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nonl(); /* No CR/NL translation. */
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raw(); /* No special characters. */
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idlok(stdscr, 1); /* Use hardware insert/delete line. */
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/*
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* Vi wants the cursor keys in application mode. The historic version
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* of curses had no way to do this, and the newer versions (System V)
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* only enable it through the wgetch() interface. Do it roughly, here.
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*/
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svi_keypad(sp, 1);
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/*
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* XXX
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* Major compatibility kluge. When we call the curses raw() routine,
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* XON/XOFF flow control is turned off. Old terminals like to have
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* it, so if it's originally set for the tty, we turn it back on. For
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* some unknown reason, this causes System V curses to NOT correctly
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* restore the terminal modes when SIGTSTP is received.
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*/
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if ((ixon || ixoff) &&
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!tcgetattr(STDIN_FILENO, &sp->gp->s5_curses_botch)) {
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t = sp->gp->s5_curses_botch;
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if (ixon)
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t.c_iflag |= IXON;
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if (ixoff)
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t.c_iflag |= IXOFF;
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F_SET(sp->gp, G_CURSES_S5CB);
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(void)tcsetattr(STDIN_FILENO, TCSASOFT | TCSADRAIN, &t);
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}
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/*
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* The first screen in the list gets it all. All other screens
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* are hidden and lose their maps.
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*/
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d_to_h(sp, "Window resize");
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/* Initialize terminal values. */
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SVP(sp)->srows = O_VAL(sp, O_LINES);
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/*
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* Initialize screen values.
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*
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* Small windows: see svi/svi_refresh.c:svi_refresh, section 3b.
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*
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* Setup:
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* t_minrows is the minimum rows to display
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* t_maxrows is the maximum rows to display (rows - 1)
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* t_rows is the rows currently being displayed
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*/
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sp->rows = SVP(sp)->srows;
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sp->cols = O_VAL(sp, O_COLUMNS);
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sp->woff = 0;
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sp->t_rows = sp->t_minrows = O_VAL(sp, O_WINDOW);
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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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msgq(sp, M_INFO,
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"Windows option value is too large, max is %u", sp->t_rows);
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}
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sp->t_maxrows = sp->rows - 1;
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/* Create the screen map. */
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if ((HMAP = malloc(SIZE_HMAP(sp) * sizeof(SMAP))) == NULL) {
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msgq(sp, M_SYSERR, NULL);
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return (1);
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}
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memset(HMAP, 0, SIZE_HMAP(sp) * sizeof(SMAP));
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TMAP = HMAP + (sp->t_rows - 1);
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F_SET(sp->gp, G_CURSES_INIT); /* Curses initialized. */
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F_SET(SVP(sp), SVI_CUR_INVALID); /* Cursor is invalid. */
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return (0);
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}
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/*
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* svi_rrel --
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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_rrel(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_curses_end --
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* Move to the bottom of the screen, end curses.
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*/
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int
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svi_curses_end(sp)
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SCR *sp;
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{
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/* We get called before anything has been initialized. */
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if (!F_ISSET(sp->gp, G_CURSES_INIT))
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return (0);
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F_CLR(sp->gp, G_CURSES_INIT);
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/* Move to the bottom of the screen. */
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if (move(INFOLINE(sp), 0) == OK) {
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clrtoeol();
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refresh();
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}
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/*
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* XXX
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* See comment in svi_curses_init().
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*/
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if (F_ISSET(sp->gp, G_CURSES_S5CB))
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(void)tcsetattr(STDIN_FILENO,
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TCSASOFT | TCSADRAIN, &sp->gp->s5_curses_botch);
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F_CLR(sp->gp, G_CURSES_S5CB);
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svi_keypad(sp, 0);
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endwin();
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return (0);
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}
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/*
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* svi_keypad --
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* Put the keypad/cursor arrows into or out of application mode.
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*/
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static void
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svi_keypad(sp, on)
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SCR *sp;
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int on;
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{
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char *sbp, *t, kbuf[2048], sbuf[128];
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if (tgetent(kbuf, O_STR(sp, O_TERM)) != 1)
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return;
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sbp = sbuf;
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if ((t = tgetstr(on ? "ks" : "ke", &sbp)) == NULL)
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return;
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(void)tputs(t, 0, svi_keypad_pc);
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}
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/*
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* svi_keypad_pc --
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* putchar routine for tputs().
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*/
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static void
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svi_keypad_pc(argch)
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int argch;
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{
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char ch;
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ch = argch;
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(void)write(STDOUT_FILENO, &ch, sizeof(ch));
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}
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/*
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* svi_initscr_kluge --
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* Read all of the waiting keys before calling initscr().
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*/
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static int
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svi_initscr_kluge(sp, tp)
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SCR *sp;
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struct termios *tp;
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{
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struct termios rawt;
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int rval;
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/*
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* Turn off canonical input processing so that we get partial
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* lines as well as complete ones. Also, set the MIN/TIME
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* values -- System V and SMI systems overload VMIN and VTIME,
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* such that VMIN is the same as the VEOF element, and VTIME is
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* the same as the VEOL element. This means, that if VEOF was
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* ^D, the default VMIN is 4. Majorly stupid.
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*/
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rawt = *tp;
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rawt.c_cc[VMIN] = 1;
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rawt.c_cc[VTIME] = 0;
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rawt.c_lflag &= ~ICANON;
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if (tcsetattr(STDIN_FILENO, TCSASOFT | TCSANOW, &rawt))
|
|
return (1);
|
|
rval = term_key_queue(sp);
|
|
if (tcsetattr(STDIN_FILENO, TCSASOFT | TCSANOW, tp) || rval)
|
|
return (1);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* d_to_h --
|
|
* Move all but the current screen to the hidden queue.
|
|
*/
|
|
static void
|
|
d_to_h(sp, emsg)
|
|
SCR *sp;
|
|
char *emsg;
|
|
{
|
|
SCR *tsp;
|
|
int hidden;
|
|
|
|
for (hidden = 0;
|
|
(tsp = sp->gp->dq.cqh_first) != (void *)&sp->gp->dq; ++hidden) {
|
|
if (_HMAP(tsp) != NULL)
|
|
FREE(_HMAP(tsp), SIZE_HMAP(tsp) * sizeof(SMAP));
|
|
CIRCLEQ_REMOVE(&sp->gp->dq, tsp, q);
|
|
CIRCLEQ_INSERT_TAIL(&sp->gp->hq, tsp, q);
|
|
}
|
|
CIRCLEQ_REMOVE(&sp->gp->hq, sp, q);
|
|
CIRCLEQ_INSERT_TAIL(&sp->gp->dq, sp, q);
|
|
if (hidden > 1)
|
|
msgq(sp, M_INFO,
|
|
"%s backgrounded %d screens; use :display to list the screens.",
|
|
emsg, hidden - 1);
|
|
}
|