1 /*        $NetBSD: ex_screen.c,v 1.4 2014/01/26 21:43:45 christos Exp $ */
2 /*-
3  * Copyright (c) 1993, 1994
4  *        The Regents of the University of California.  All rights reserved.
5  * Copyright (c) 1993, 1994, 1995, 1996
6  *        Keith Bostic.  All rights reserved.
7  *
8  * See the LICENSE file for redistribution information.
9  */
10 
11 #include "config.h"
12 
13 #include <sys/cdefs.h>
14 #if 0
15 #ifndef lint
16 static const char sccsid[] = "Id: ex_screen.c,v 10.12 2001/06/25 15:19:19 skimo Exp  (Berkeley) Date: 2001/06/25 15:19:19 ";
17 #endif /* not lint */
18 #else
19 __RCSID("$NetBSD: ex_screen.c,v 1.4 2014/01/26 21:43:45 christos Exp $");
20 #endif
21 
22 #include <sys/types.h>
23 #include <sys/queue.h>
24 #include <sys/time.h>
25 
26 #include <bitstring.h>
27 #include <limits.h>
28 #include <stdio.h>
29 #include <stdlib.h>
30 #include <string.h>
31 
32 #include "../common/common.h"
33 #include "../vi/vi.h"
34 
35 /*
36  * ex_bg --         :bg
37  *        Hide the screen.
38  *
39  * PUBLIC: int ex_bg __P((SCR *, EXCMD *));
40  */
41 int
ex_bg(SCR * sp,EXCMD * cmdp)42 ex_bg(SCR *sp, EXCMD *cmdp)
43 {
44           return (vs_bg(sp));
45 }
46 
47 /*
48  * ex_fg --         :fg [file]
49  *        Show the screen.
50  *
51  * PUBLIC: int ex_fg __P((SCR *, EXCMD *));
52  */
53 int
ex_fg(SCR * sp,EXCMD * cmdp)54 ex_fg(SCR *sp, EXCMD *cmdp)
55 {
56           SCR *nsp;
57           int newscreen;
58 
59           newscreen = F_ISSET(cmdp, E_NEWSCREEN);
60           if (vs_fg(sp, &nsp, cmdp->argc ? cmdp->argv[0]->bp : NULL, newscreen))
61                     return (1);
62 
63           /* Set up the switch. */
64           if (newscreen) {
65                     sp->nextdisp = nsp;
66                     F_SET(sp, SC_SSWITCH);
67           }
68           return (0);
69 }
70 
71 /*
72  * ex_resize --     :resize [+-]rows
73  *        Change the screen size.
74  *
75  * PUBLIC: int ex_resize __P((SCR *, EXCMD *));
76  */
77 int
ex_resize(SCR * sp,EXCMD * cmdp)78 ex_resize(SCR *sp, EXCMD *cmdp)
79 {
80           adj_t adj;
81 
82           switch (FL_ISSET(cmdp->iflags,
83               E_C_COUNT | E_C_COUNT_NEG | E_C_COUNT_POS)) {
84           case E_C_COUNT:
85                     adj = A_SET;
86                     break;
87           case E_C_COUNT | E_C_COUNT_NEG:
88                     adj = A_DECREASE;
89                     break;
90           case E_C_COUNT | E_C_COUNT_POS:
91                     adj = A_INCREASE;
92                     break;
93           default:
94                     ex_emsg(sp, cmdp->cmd->usage, EXM_USAGE);
95                     return (1);
96           }
97           return (vs_resize(sp, cmdp->count, adj));
98 }
99 
100 /*
101  * ex_sdisplay --
102  *        Display the list of screens.
103  *
104  * PUBLIC: int ex_sdisplay __P((SCR *));
105  */
106 int
ex_sdisplay(SCR * sp)107 ex_sdisplay(SCR *sp)
108 {
109           GS *gp;
110           SCR *tsp;
111           int cnt, sep;
112           size_t col, len;
113 
114           gp = sp->gp;
115           if ((tsp = TAILQ_FIRST(&gp->hq)) == NULL) {
116                     msgq(sp, M_INFO, "149|No background screens to display");
117                     return (0);
118           }
119 
120           col = len = sep = 0;
121           for (cnt = 1; tsp != NULL && !INTERRUPTED(sp);
122               tsp = TAILQ_NEXT(tsp, q)) {
123                     col += len = strlen(tsp->frp->name) + sep;
124                     if (col >= sp->cols - 1) {
125                               col = len;
126                               sep = 0;
127                               (void)ex_puts(sp, "\n");
128                     } else if (cnt != 1) {
129                               sep = 1;
130                               (void)ex_puts(sp, " ");
131                     }
132                     (void)ex_puts(sp, tsp->frp->name);
133                     ++cnt;
134           }
135           if (!INTERRUPTED(sp))
136                     (void)ex_puts(sp, "\n");
137           return (0);
138 }
139