2 * Copyright (c) 1992, 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.
7 * See the LICENSE file for redistribution information.
13 static const char sccsid
[] = "$Id: v_z.c,v 10.12 2001/06/25 15:19:36 skimo Exp $ (Berkeley) $Date: 2001/06/25 15:19:36 $";
16 #include <sys/types.h>
17 #include <sys/queue.h>
20 #include <bitstring.h>
24 #include "../common/common.h"
28 * v_z -- [count]z[count][-.+^<CR>]
31 * PUBLIC: int v_z __P((SCR *, VICMD *));
34 v_z(SCR
*sp
, VICMD
*vp
)
40 * The first count is the line to use. If the value doesn't
41 * exist, use the last line.
43 if (F_ISSET(vp
, VC_C1SET
)) {
45 if (!db_exist(sp
, lno
) && db_last(sp
, &lno
))
48 lno
= vp
->m_start
.lno
;
50 /* Set default return cursor line. */
51 vp
->m_final
.lno
= lno
;
52 vp
->m_final
.cno
= vp
->m_start
.cno
;
55 * The second count is the displayed window size, i.e. the 'z' command
56 * is another way to get artificially small windows. Note, you can't
57 * grow beyond the size of the window.
60 * A window size of 0 was historically allowed, and simply ignored.
61 * This could be much more simply done by modifying the value of the
62 * O_WINDOW option, but that's not how it worked historically.
64 if (F_ISSET(vp
, VC_C2SET
) && vp
->count2
!= 0) {
65 if (vp
->count2
> O_VAL(sp
, O_WINDOW
))
66 vp
->count2
= O_VAL(sp
, O_WINDOW
);
67 if (vs_crel(sp
, vp
->count2
))
71 switch (vp
->character
) {
72 case '-': /* Put the line at the bottom. */
73 if (vs_sm_fill(sp
, lno
, P_BOTTOM
))
76 case '.': /* Put the line in the middle. */
77 if (vs_sm_fill(sp
, lno
, P_MIDDLE
))
82 * If the user specified a line number, put that line at the
83 * top and move the cursor to it. Otherwise, scroll forward
84 * a screen from the current screen.
86 if (F_ISSET(vp
, VC_C1SET
)) {
87 if (vs_sm_fill(sp
, lno
, P_TOP
))
89 if (vs_sm_position(sp
, &vp
->m_final
, 0, P_TOP
))
92 if (vs_sm_scroll(sp
, &vp
->m_final
, sp
->t_rows
, Z_PLUS
))
97 * If the user specified a line number, put that line at the
98 * bottom, move the cursor to it, and then display the screen
99 * before that one. Otherwise, scroll backward a screen from
100 * the current screen.
103 * Note, we match the off-by-one characteristics of historic
106 if (F_ISSET(vp
, VC_C1SET
)) {
107 if (vs_sm_fill(sp
, lno
, P_BOTTOM
))
109 if (vs_sm_position(sp
, &vp
->m_final
, 0, P_TOP
))
111 if (vs_sm_fill(sp
, vp
->m_final
.lno
, P_BOTTOM
))
114 if (vs_sm_scroll(sp
, &vp
->m_final
, sp
->t_rows
, Z_CARAT
))
117 default: /* Put the line at the top for <cr>. */
118 value
= KEY_VAL(sp
, vp
->character
);
119 if (value
!= K_CR
&& value
!= K_NL
) {
120 v_emsg(sp
, vp
->kp
->usage
, VIM_USAGE
);
123 if (vs_sm_fill(sp
, lno
, P_TOP
))
132 * Change the relative size of the current screen.
134 * PUBLIC: int vs_crel __P((SCR *, long));
137 vs_crel(SCR
*sp
, long int count
)
139 sp
->t_minrows
= sp
->t_rows
= count
;
140 if (sp
->t_rows
> sp
->rows
- 1)
141 sp
->t_minrows
= sp
->t_rows
= sp
->rows
- 1;
142 TMAP
= HMAP
+ (sp
->t_rows
- 1);
143 F_SET(sp
, SC_SCR_REDRAW
);