1 /*- 2 * Copyright (c) 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * Copyright (c) 1992, 1993, 1994, 1995, 1996 5 * Keith Bostic. All rights reserved. 6 * 7 * See the LICENSE file for redistribution information. 8 */ 9 10 #include "config.h" 11 12 #ifndef lint 13 static const char sccsid[] = "@(#)v_screen.c 10.10 (Berkeley) 4/27/96"; 14 #endif /* not lint */ 15 16 #include <sys/types.h> 17 #include <sys/queue.h> 18 #include <sys/time.h> 19 20 #include <bitstring.h> 21 #include <limits.h> 22 #include <stdio.h> 23 24 #include "../common/common.h" 25 #include "vi.h" 26 27 /* 28 * v_screen -- ^W 29 * Switch screens. 30 * 31 * PUBLIC: int v_screen __P((SCR *, VICMD *)); 32 */ 33 int 34 v_screen(sp, vp) 35 SCR *sp; 36 VICMD *vp; 37 { 38 /* 39 * You can't leave a colon command-line edit window -- it's not that 40 * it won't work, but it gets real weird, real fast when you execute 41 * a colon command out of a window that was forked from a window that's 42 * now backgrounded... You get the idea. 43 */ 44 if (F_ISSET(sp, SC_COMEDIT)) { 45 msgq(sp, M_ERR, 46 "308|Enter <CR> to execute a command, :q to exit"); 47 return (1); 48 } 49 50 /* 51 * Try for the next lower screen, or, go back to the first 52 * screen on the stack. 53 */ 54 if (sp->q.cqe_next != (void *)&sp->gp->dq) 55 sp->nextdisp = sp->q.cqe_next; 56 else if (sp->gp->dq.cqh_first == sp) { 57 msgq(sp, M_ERR, "187|No other screen to switch to"); 58 return (1); 59 } else 60 sp->nextdisp = sp->gp->dq.cqh_first; 61 62 F_SET(sp->nextdisp, SC_STATUS); 63 F_SET(sp, SC_SSWITCH | SC_STATUS); 64 return (0); 65 } 66