usr.bin/vi/nvi/v_yank.c

/*-
 * Copyright (c) 1992, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static char sccsid[] = "@(#)v_yank.c    8.11 (Berkeley) 1/9/94";
#endif /* not lint */

#include <sys/types.h>

#include "vi.h"
#include "vcmd.h"

/*
 * v_Yank --    [buffer][count]Y
 *      Yank lines of text into a cut buffer.
 */
int
v_Yank(sp, ep, vp, fm, tm, rp)
        SCR *sp;
        EXF *ep;
        VICMDARG *vp;
        MARK *fm, *tm, *rp;
{
        if (file_gline(sp, ep, tm->lno, NULL) == NULL) {
                v_eof(sp, ep, fm);
                return (1);
        }
        if (cut(sp, ep, NULL, F_ISSET(vp, VC_BUFFER) ? &vp->buffer : NULL,
            fm, tm, CUT_LINEMODE))
                return (1);

        sp->rptlines[L_YANKED] += (tm->lno - fm->lno) + 1;
        return (0);
}

/*
 * v_yank --    [buffer][count]y[count][motion]
 *      Yank text (or lines of text) into a cut buffer.
 */
int
v_yank(sp, ep, vp, fm, tm, rp)
        SCR *sp;
        EXF *ep;
        VICMDARG *vp;
        MARK *fm, *tm, *rp;
{
        if (F_ISSET(vp, VC_LMODE)) {
                if (file_gline(sp, ep, tm->lno, NULL) == NULL) {
                        v_eof(sp, ep, fm);
                        return (1);
                }
                if (cut(sp, ep,
                    NULL, F_ISSET(vp, VC_BUFFER) ? &vp->buffer : NULL,
                    fm, tm, CUT_LINEMODE))
                        return (1);
        } else if (cut(sp, ep,
            NULL, F_ISSET(vp, VC_BUFFER) ? &vp->buffer : NULL, fm, tm, 0))
                return (1);

        /*
         * !!!
         * Historic vi moved the cursor to the from MARK if it was before the
         * current cursor.  This makes no sense.  For example, "yj" moves the
         * cursor but "yk" does not.  Unfortunately, it's too late to change
         * this now.  Matching the historic semantics isn't easy.  The line
         * number was always changed and column movement was usually relative.
         * However, "y'a" moved the cursor to the first non-blank of the line
         * marked by a, while "y`a" moved the cursor to the line and column
         * marked by a.
         */
        if (F_ISSET(vp, VC_REVMOVE)) {
                rp->lno = fm->lno;
                if (vp->mkp == &vikeys['\'']) {
                        rp->cno = 0;
                        (void)nonblank(sp, ep, rp->lno, &rp->cno);
                } else if (vp->mkp == &vikeys['`'])
                        rp->cno = fm->cno;
                else
                        rp->cno = sp->s_relative(sp, ep, rp->lno);
        }

        sp->rptlines[L_YANKED] += (tm->lno - fm->lno) + 1;
        return (0);
}