284 lines
6.4 KiB
C
284 lines
6.4 KiB
C
/*-
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* Copyright (c) 1992, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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* Copyright (c) 1992, 1993, 1994, 1995, 1996
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* Keith Bostic. All rights reserved.
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*
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* See the LICENSE file for redistribution information.
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*/
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#include "config.h"
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#ifndef lint
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static const char sccsid[] = "$Id: v_left.c,v 10.9 2001/06/25 15:19:32 skimo Exp $";
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/queue.h>
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#include <sys/time.h>
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#include <bitstring.h>
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#include <limits.h>
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#include <stdio.h>
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#include "../common/common.h"
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#include "vi.h"
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/*
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* v_left -- [count]^H, [count]h
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* Move left by columns.
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*
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* PUBLIC: int v_left(SCR *, VICMD *);
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*/
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int
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v_left(SCR *sp, VICMD *vp)
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{
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recno_t cnt;
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/*
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* !!!
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* The ^H and h commands always failed in the first column.
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*/
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if (vp->m_start.cno == 0) {
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v_sol(sp);
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return (1);
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}
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/* Find the end of the range. */
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cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1;
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if (vp->m_start.cno > cnt)
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vp->m_stop.cno = vp->m_start.cno - cnt;
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else
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vp->m_stop.cno = 0;
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/*
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* All commands move to the end of the range. Motion commands
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* adjust the starting point to the character before the current
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* one.
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*/
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if (ISMOTION(vp))
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--vp->m_start.cno;
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vp->m_final = vp->m_stop;
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return (0);
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}
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/*
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* v_cfirst -- [count]_
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* Move to the first non-blank character in a line.
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*
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* PUBLIC: int v_cfirst(SCR *, VICMD *);
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*/
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int
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v_cfirst(SCR *sp, VICMD *vp)
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{
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recno_t cnt, lno;
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/*
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* !!!
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* If the _ is a motion component, it makes the command a line motion
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* e.g. "d_" deletes the line. It also means that the cursor doesn't
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* move.
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*
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* The _ command never failed in the first column.
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*/
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if (ISMOTION(vp))
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F_SET(vp, VM_LMODE);
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/*
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* !!!
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* Historically a specified count makes _ move down count - 1
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* rows, so, "3_" is the same as "2j_".
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*/
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cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1;
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if (cnt != 1) {
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--vp->count;
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return (v_down(sp, vp));
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}
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/*
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* Move to the first non-blank.
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*
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* Can't just use RCM_SET_FNB, in case _ is used as the motion
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* component of another command.
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*/
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vp->m_stop.cno = 0;
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if (nonblank(sp, vp->m_stop.lno, &vp->m_stop.cno))
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return (1);
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/*
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* !!!
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* The _ command has to fail if the file is empty and we're doing
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* a delete. If deleting line 1, and 0 is the first nonblank,
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* make the check.
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*/
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if (vp->m_stop.lno == 1 &&
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vp->m_stop.cno == 0 && ISCMD(vp->rkp, 'd')) {
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if (db_last(sp, &lno))
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return (1);
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if (lno == 0) {
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v_sol(sp);
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return (1);
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}
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}
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/*
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* Delete and non-motion commands move to the end of the range,
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* yank stays at the start. Ignore others.
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*/
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vp->m_final =
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ISMOTION(vp) && ISCMD(vp->rkp, 'y') ? vp->m_start : vp->m_stop;
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return (0);
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}
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/*
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* v_first -- ^
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* Move to the first non-blank character in this line.
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*
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* PUBLIC: int v_first(SCR *, VICMD *);
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*/
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int
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v_first(SCR *sp, VICMD *vp)
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{
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/*
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* !!!
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* Yielding to none in our quest for compatibility with every
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* historical blemish of vi, no matter how strange it might be,
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* we permit the user to enter a count and then ignore it.
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*/
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/*
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* Move to the first non-blank.
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*
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* Can't just use RCM_SET_FNB, in case ^ is used as the motion
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* component of another command.
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*/
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vp->m_stop.cno = 0;
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if (nonblank(sp, vp->m_stop.lno, &vp->m_stop.cno))
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return (1);
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/*
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* !!!
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* The ^ command succeeded if used as a command when the cursor was
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* on the first non-blank in the line, but failed if used as a motion
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* component in the same situation.
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*/
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if (ISMOTION(vp) && vp->m_start.cno == vp->m_stop.cno) {
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v_sol(sp);
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return (1);
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}
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/*
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* If moving right, non-motion commands move to the end of the range.
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* Delete and yank stay at the start. Motion commands adjust the
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* ending point to the character before the current ending charcter.
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*
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* If moving left, all commands move to the end of the range. Motion
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* commands adjust the starting point to the character before the
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* current starting character.
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*/
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if (vp->m_start.cno < vp->m_stop.cno)
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if (ISMOTION(vp)) {
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--vp->m_stop.cno;
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vp->m_final = vp->m_start;
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} else
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vp->m_final = vp->m_stop;
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else {
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if (ISMOTION(vp))
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--vp->m_start.cno;
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vp->m_final = vp->m_stop;
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}
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return (0);
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}
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/*
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* v_ncol -- [count]|
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* Move to column count or the first column on this line. If the
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* requested column is past EOL, move to EOL. The nasty part is
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* that we have to know character column widths to make this work.
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*
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* PUBLIC: int v_ncol(SCR *, VICMD *);
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*/
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int
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v_ncol(SCR *sp, VICMD *vp)
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{
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if (F_ISSET(vp, VC_C1SET) && vp->count > 1) {
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--vp->count;
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vp->m_stop.cno =
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vs_colpos(sp, vp->m_start.lno, (size_t)vp->count);
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/*
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* !!!
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* The | command succeeded if used as a command and the cursor
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* didn't move, but failed if used as a motion component in the
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* same situation.
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*/
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if (ISMOTION(vp) && vp->m_stop.cno == vp->m_start.cno) {
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v_nomove(sp);
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return (1);
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}
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} else {
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/*
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* !!!
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* The | command succeeded if used as a command in column 0
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* without a count, but failed if used as a motion component
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* in the same situation.
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*/
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if (ISMOTION(vp) && vp->m_start.cno == 0) {
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v_sol(sp);
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return (1);
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}
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vp->m_stop.cno = 0;
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}
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/*
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* If moving right, non-motion commands move to the end of the range.
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* Delete and yank stay at the start. Motion commands adjust the
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* ending point to the character before the current ending charcter.
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*
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* If moving left, all commands move to the end of the range. Motion
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* commands adjust the starting point to the character before the
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* current starting character.
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*/
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if (vp->m_start.cno < vp->m_stop.cno)
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if (ISMOTION(vp)) {
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--vp->m_stop.cno;
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vp->m_final = vp->m_start;
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} else
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vp->m_final = vp->m_stop;
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else {
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if (ISMOTION(vp))
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--vp->m_start.cno;
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vp->m_final = vp->m_stop;
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}
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return (0);
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}
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/*
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* v_zero -- 0
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* Move to the first column on this line.
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*
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* PUBLIC: int v_zero(SCR *, VICMD *);
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*/
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int
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v_zero(SCR *sp, VICMD *vp)
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{
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/*
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* !!!
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* The 0 command succeeded if used as a command in the first column
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* but failed if used as a motion component in the same situation.
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*/
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if (ISMOTION(vp) && vp->m_start.cno == 0) {
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v_sol(sp);
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return (1);
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}
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/*
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* All commands move to the end of the range. Motion commands
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* adjust the starting point to the character before the current
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* one.
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*/
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vp->m_stop.cno = 0;
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if (ISMOTION(vp))
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--vp->m_start.cno;
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vp->m_final = vp->m_stop;
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return (0);
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}
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