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 #include <sys/types.h> 13 #include <sys/queue.h> 14 #include <sys/time.h> 15 16 #include <bitstring.h> 17 #include <limits.h> 18 #include <stdio.h> 19 20 #include "../common/common.h" 21 #include "vi.h" 22 23 /* 24 * v_screen -- ^W 25 * Switch screens. 26 * 27 * PUBLIC: int v_screen(SCR *, VICMD *); 28 */ 29 int 30 v_screen(SCR *sp, VICMD *vp) 31 { 32 /* 33 * You can't leave a colon command-line edit window -- it's not that 34 * it won't work, but it gets real weird, real fast when you execute 35 * a colon command out of a window that was forked from a window that's 36 * now backgrounded... You get the idea. 37 */ 38 if (F_ISSET(sp, SC_COMEDIT)) { 39 msgq(sp, M_ERR, 40 "308|Enter <CR> to execute a command, :q to exit"); 41 return (1); 42 } 43 44 /* 45 * Try for the next lower screen, or, go back to the first 46 * screen on the stack. 47 */ 48 if (TAILQ_NEXT(sp, q) != NULL) 49 sp->nextdisp = TAILQ_NEXT(sp, q); 50 else if (TAILQ_FIRST(sp->gp->dq) == sp) { 51 msgq(sp, M_ERR, "187|No other screen to switch to"); 52 return (1); 53 } else 54 sp->nextdisp = TAILQ_FIRST(sp->gp->dq); 55 56 F_SET(sp->nextdisp, SC_STATUS); 57 F_SET(sp, SC_SSWITCH | SC_STATUS); 58 return (0); 59 } 60