/*      $OpenBSD: v_delete.c,v 1.8 2014/11/12 04:28:41 bentley Exp $    */

/*-
 * Copyright (c) 1992, 1993, 1994
 *      The Regents of the University of California.  All rights reserved.
 * Copyright (c) 1992, 1993, 1994, 1995, 1996
 *      Keith Bostic.  All rights reserved.
 *
 * See the LICENSE file for redistribution information.
 */

#include "config.h"

#include <sys/types.h>
#include <sys/queue.h>
#include <sys/time.h>

#include <bitstring.h>
#include <limits.h>
#include <stdio.h>

#include "../common/common.h"
#include "vi.h"

/*
 * v_delete -- [buffer][count]d[count]motion
 *             [buffer][count]D
 *      Delete a range of text.
 *
 * PUBLIC: int v_delete(SCR *, VICMD *);
 */
int
v_delete(SCR *sp, VICMD *vp)
{
        recno_t nlines;
        size_t len;
        int lmode;

        lmode = F_ISSET(vp, VM_LMODE) ? CUT_LINEMODE : 0;

        /* Yank the lines. */
        if (cut(sp, F_ISSET(vp, VC_BUFFER) ? &vp->buffer : NULL,
            &vp->m_start, &vp->m_stop,
            lmode | (F_ISSET(vp, VM_CUTREQ) ? CUT_NUMREQ : CUT_NUMOPT)))
                return (1);

        /* Delete the lines. */
        if (del(sp, &vp->m_start, &vp->m_stop, lmode))
                return (1);

        /*
         * Check for deletion of the entire file.  Try to check a close
         * by line so we don't go to the end of the file unnecessarily.
         */
        if (!db_exist(sp, vp->m_final.lno + 1)) {
                if (db_last(sp, &nlines))
                        return (1);
                if (nlines == 0) {
                        vp->m_final.lno = 1;
                        vp->m_final.cno = 0;
                        return (0);
                }
        }

        /*
         * One special correction, in case we've deleted the current line or
         * character.  We check it here instead of checking in every command
         * that can be a motion component.
         */
        if (db_get(sp, vp->m_final.lno, 0, NULL, &len)) {
                if (db_get(sp, nlines, DBG_FATAL, NULL, &len))
                        return (1);
                vp->m_final.lno = nlines;
        }

        /*
         * !!!
         * Cursor movements, other than those caused by a line mode command
         * moving to another line, historically reset the relative position.
         *
         * This currently matches the check made in v_yank(), I'm hoping that
         * they should be consistent...
         */  
        if (!F_ISSET(vp, VM_LMODE)) {
                F_CLR(vp, VM_RCM_MASK);
                F_SET(vp, VM_RCM_SET);

                /* Make sure the set cursor position exists. */
                if (vp->m_final.cno >= len)
                        vp->m_final.cno = len ? len - 1 : 0;
        }

        /*
         * !!!
         * The "dd" command moved to the first non-blank; "d<motion>"
         * didn't.
         */
        if (F_ISSET(vp, VM_LDOUBLE)) {
                F_CLR(vp, VM_RCM_MASK);
                F_SET(vp, VM_RCM_SETFNB);
        }
        return (0);
}