/* vi:set ts=8 sts=4 sw=4 noet:
 *
 * VIM - Vi IMproved	by Bram Moolenaar et al.
 *
 * Do ":help uganda"  in Vim to read copying and usage conditions.
 * Do ":help credits" in Vim to see a list of people who contributed.
 * See README.txt for an overview of the Vim source code.
 */
/*
 * normal.c:	Contains the main routine for processing characters in command
 *		mode.  Communicates closely with the code in ops.c to handle
 *		the operators.
 */

#include "vim.h"

static int	VIsual_mode_orig = NUL;		// saved Visual mode

#ifdef FEAT_EVAL
static void	set_vcount_ca(cmdarg_T *cap, int *set_prevcount);
#endif
static void	unshift_special(cmdarg_T *cap);
static void	del_from_showcmd(int);

/*
 * nv_*(): functions called to handle Normal and Visual mode commands.
 * n_*(): functions called to handle Normal mode commands.
 * v_*(): functions called to handle Visual mode commands.
 */
static void	nv_ignore(cmdarg_T *cap);
static void	nv_nop(cmdarg_T *cap);
static void	nv_error(cmdarg_T *cap);
static void	nv_help(cmdarg_T *cap);
static void	nv_addsub(cmdarg_T *cap);
static void	nv_page(cmdarg_T *cap);
static void	nv_zet(cmdarg_T *cap);
#ifdef FEAT_GUI
static void	nv_ver_scrollbar(cmdarg_T *cap);
static void	nv_hor_scrollbar(cmdarg_T *cap);
#endif
#ifdef FEAT_GUI_TABLINE
static void	nv_tabline(cmdarg_T *cap);
static void	nv_tabmenu(cmdarg_T *cap);
#endif
static void	nv_exmode(cmdarg_T *cap);
static void	nv_colon(cmdarg_T *cap);
static void	nv_ctrlg(cmdarg_T *cap);
static void	nv_ctrlh(cmdarg_T *cap);
static void	nv_clear(cmdarg_T *cap);
static void	nv_ctrlo(cmdarg_T *cap);
static void	nv_hat(cmdarg_T *cap);
static void	nv_Zet(cmdarg_T *cap);
static void	nv_ident(cmdarg_T *cap);
static void	nv_tagpop(cmdarg_T *cap);
static void	nv_scroll(cmdarg_T *cap);
static void	nv_right(cmdarg_T *cap);
static void	nv_left(cmdarg_T *cap);
static void	nv_up(cmdarg_T *cap);
static void	nv_down(cmdarg_T *cap);
static void	nv_end(cmdarg_T *cap);
static void	nv_dollar(cmdarg_T *cap);
static void	nv_search(cmdarg_T *cap);
static void	nv_next(cmdarg_T *cap);
static int	normal_search(cmdarg_T *cap, int dir, char_u *pat, int opt, int *wrapped);
static void	nv_csearch(cmdarg_T *cap);
static void	nv_brackets(cmdarg_T *cap);
static void	nv_percent(cmdarg_T *cap);
static void	nv_brace(cmdarg_T *cap);
static void	nv_mark(cmdarg_T *cap);
static void	nv_findpar(cmdarg_T *cap);
static void	nv_undo(cmdarg_T *cap);
static void	nv_kundo(cmdarg_T *cap);
static void	nv_Replace(cmdarg_T *cap);
static void	nv_replace(cmdarg_T *cap);
static void	nv_cursormark(cmdarg_T *cap, int flag, pos_T *pos);
static void	v_visop(cmdarg_T *cap);
static void	nv_subst(cmdarg_T *cap);
static void	nv_abbrev(cmdarg_T *cap);
static void	nv_optrans(cmdarg_T *cap);
static void	nv_gomark(cmdarg_T *cap);
static void	nv_pcmark(cmdarg_T *cap);
static void	nv_regname(cmdarg_T *cap);
static void	nv_visual(cmdarg_T *cap);
static void	n_start_visual_mode(int c);
static void	nv_window(cmdarg_T *cap);
static void	nv_suspend(cmdarg_T *cap);
static void	nv_g_cmd(cmdarg_T *cap);
static void	nv_dot(cmdarg_T *cap);
static void	nv_redo_or_register(cmdarg_T *cap);
static void	nv_Undo(cmdarg_T *cap);
static void	nv_tilde(cmdarg_T *cap);
static void	nv_operator(cmdarg_T *cap);
#ifdef FEAT_EVAL
static void	set_op_var(int optype);
#endif
static void	nv_lineop(cmdarg_T *cap);
static void	nv_home(cmdarg_T *cap);
static void	nv_pipe(cmdarg_T *cap);
static void	nv_bck_word(cmdarg_T *cap);
static void	nv_wordcmd(cmdarg_T *cap);
static void	nv_beginline(cmdarg_T *cap);
static void	adjust_cursor(oparg_T *oap);
static void	adjust_for_sel(cmdarg_T *cap);
static void	nv_select(cmdarg_T *cap);
static void	nv_goto(cmdarg_T *cap);
static void	nv_normal(cmdarg_T *cap);
static void	nv_esc(cmdarg_T *oap);
static void	nv_edit(cmdarg_T *cap);
static void	invoke_edit(cmdarg_T *cap, int repl, int cmd, int startln);
static void	nv_object(cmdarg_T *cap);
static void	nv_record(cmdarg_T *cap);
static void	nv_at(cmdarg_T *cap);
static void	nv_halfpage(cmdarg_T *cap);
static void	nv_join(cmdarg_T *cap);
static void	nv_put(cmdarg_T *cap);
static void	nv_put_opt(cmdarg_T *cap, int fix_indent);
static void	nv_open(cmdarg_T *cap);
#ifdef FEAT_NETBEANS_INTG
static void	nv_nbcmd(cmdarg_T *cap);
#endif
#ifdef FEAT_DND
static void	nv_drop(cmdarg_T *cap);
#endif
static void	nv_cursorhold(cmdarg_T *cap);

// Declare nv_cmds[].
#define DO_DECLARE_NVCMD
#include "nv_cmds.h"

// Include the lookuptable generated by create_nvcmdidx.vim.
#include "nv_cmdidxs.h"

/*
 * Search for a command in the commands table.
 * Returns -1 for invalid command.
 */
    static int
find_command(int cmdchar)
{
    int		i;
    int		idx;
    int		top, bot;
    int		c;

    // A multi-byte character is never a command.
    if (cmdchar >= 0x100)
	return -1;

    // We use the absolute value of the character.  Special keys have a
    // negative value, but are sorted on their absolute value.
    if (cmdchar < 0)
	cmdchar = -cmdchar;

    // If the character is in the first part: The character is the index into
    // nv_cmd_idx[].
    if (cmdchar <= nv_max_linear)
	return nv_cmd_idx[cmdchar];

    // Perform a binary search.
    bot = nv_max_linear + 1;
    top = NV_CMDS_SIZE - 1;
    idx = -1;
    while (bot <= top)
    {
	i = (top + bot) / 2;
	c = nv_cmds[nv_cmd_idx[i]].cmd_char;
	if (c < 0)
	    c = -c;
	if (cmdchar == c)
	{
	    idx = nv_cmd_idx[i];
	    break;
	}
	if (cmdchar > c)
	    bot = i + 1;
	else
	    top = i - 1;
    }
    return idx;
}

/*
 * If currently editing a cmdline or text is locked: beep and give an error
 * message, return TRUE.
 */
    static int
check_text_locked(oparg_T *oap)
{
    if (!text_locked())
	return FALSE;

    if (oap != NULL)
	clearopbeep(oap);
    text_locked_msg();
    return TRUE;
}

/*
 * If text is locked, "curbuf_lock" or "allbuf_lock" is set:
 * Give an error message, possibly beep and return TRUE.
 * "oap" may be NULL.
 */
    int
check_text_or_curbuf_locked(oparg_T *oap)
{
    if (check_text_locked(oap))
	return TRUE;

    if (!curbuf_locked())
	return FALSE;

    if (oap != NULL)
	clearop(oap);
    return TRUE;
}

/*
 * Handle the count before a normal command and set cap->count0.
 */
    static int
normal_cmd_get_count(
	cmdarg_T	*cap,
	int		c,
	int		toplevel UNUSED,
	int		set_prevcount UNUSED,
	int		*ctrl_w,
	int		*need_flushbuf UNUSED)
{
getcount:
    if (!(VIsual_active && VIsual_select))
    {
	// Handle a count before a command and compute ca.count0.
	// Note that '0' is a command and not the start of a count, but it's
	// part of a count after other digits.
	while ((c >= '1' && c <= '9')
		|| (cap->count0 != 0 && (c == K_DEL || c == K_KDEL
			|| c == '0')))
	{
	    if (c == K_DEL || c == K_KDEL)
	    {
		cap->count0 /= 10;
		del_from_showcmd(4);	// delete the digit and ~@%
	    }
	    else if (cap->count0 > 99999999L)
	    {
		cap->count0 = 999999999L;
	    }
	    else
	    {
		cap->count0 = cap->count0 * 10 + (c - '0');
	    }
#ifdef FEAT_EVAL
	    // Set v:count here, when called from main() and not a stuffed
	    // command, so that v:count can be used in an expression mapping
	    // right after the count. Do set it for redo.
	    if (toplevel && readbuf1_empty())
		set_vcount_ca(cap, &set_prevcount);
#endif
	    if (*ctrl_w)
	    {
		++no_mapping;
		++allow_keys;		// no mapping for nchar, but keys
	    }
	    ++no_zero_mapping;		// don't map zero here
	    c = plain_vgetc();
	    LANGMAP_ADJUST(c, TRUE);
	    --no_zero_mapping;
	    if (*ctrl_w)
	    {
		--no_mapping;
		--allow_keys;
	    }
	    *need_flushbuf |= add_to_showcmd(c);
	}

	// If we got CTRL-W there may be a/another count
	if (c == Ctrl_W && !*ctrl_w && cap->oap->op_type == OP_NOP)
	{
	    *ctrl_w = TRUE;
	    cap->opcount = cap->count0;	// remember first count
	    cap->count0 = 0;
	    ++no_mapping;
	    ++allow_keys;		// no mapping for nchar, but keys
	    c = plain_vgetc();		// get next character
	    LANGMAP_ADJUST(c, TRUE);
	    --no_mapping;
	    --allow_keys;
	    *need_flushbuf |= add_to_showcmd(c);
	    goto getcount;		// jump back
	}
    }

    if (c == K_CURSORHOLD)
    {
	// Save the count values so that ca.opcount and ca.count0 are exactly
	// the same when coming back here after handling K_CURSORHOLD.
	cap->oap->prev_opcount = cap->opcount;
	cap->oap->prev_count0 = cap->count0;
    }
    else if (cap->opcount != 0)
    {
	// If we're in the middle of an operator (including after entering a
	// yank buffer with '"') AND we had a count before the operator, then
	// that count overrides the current value of ca.count0.
	// What this means effectively, is that commands like "3dw" get turned
	// into "d3w" which makes things fall into place pretty neatly.
	// If you give a count before AND after the operator, they are
	// multiplied.
	if (cap->count0)
	{
	    if (cap->opcount >= 999999999L / cap->count0)
		cap->count0 = 999999999L;
	    else
		cap->count0 *= cap->opcount;
	}
	else
	    cap->count0 = cap->opcount;
    }

    // Always remember the count.  It will be set to zero (on the next call,
    // above) when there is no pending operator.
    // When called from main(), save the count for use by the "count" built-in
    // variable.
    cap->opcount = cap->count0;
    cap->count1 = (cap->count0 == 0 ? 1 : cap->count0);

#ifdef FEAT_EVAL
    // Only set v:count when called from main() and not a stuffed command.
    // Do set it for redo.
    if (toplevel && readbuf1_empty())
	set_vcount(cap->count0, cap->count1, set_prevcount);
#endif

    return c;
}

/*
 * Returns TRUE if the normal command (cap) needs a second character.
 */
    static int
normal_cmd_needs_more_chars(cmdarg_T *cap, short_u cmd_flags)
{
    return ((cmd_flags & NV_NCH)
	    && (((cmd_flags & NV_NCH_NOP) == NV_NCH_NOP
		    && cap->oap->op_type == OP_NOP)
		|| (cmd_flags & NV_NCH_ALW) == NV_NCH_ALW
		|| (cap->cmdchar == 'q'
		    && cap->oap->op_type == OP_NOP
		    && reg_recording == 0
		    && reg_executing == 0)
		|| ((cap->cmdchar == 'a' || cap->cmdchar == 'i')
		    && (cap->oap->op_type != OP_NOP || VIsual_active))));
}

/*
 * Get one or more additional characters for a normal command.
 * Return the updated command index (if changed).
 */
    static int
normal_cmd_get_more_chars(
	int	    idx_arg,
	cmdarg_T    *cap,
	int	    *need_flushbuf UNUSED)
{
    int		idx = idx_arg;
    int		c;
    int		*cp;
    int		repl = FALSE;	// get character for replace mode
    int		lit = FALSE;	// get extra character literally
    int		langmap_active = FALSE;    // using :lmap mappings
    int		lang;		// getting a text character
#ifdef HAVE_INPUT_METHOD
    int		save_smd;	// saved value of p_smd
#endif

    ++no_mapping;
    ++allow_keys;		// no mapping for nchar, but allow key codes
    // Don't generate a CursorHold event here, most commands can't handle
    // it, e.g., nv_replace(), nv_csearch().
    did_cursorhold = TRUE;
    if (cap->cmdchar == 'g')
    {
	/*
	 * For 'g' get the next character now, so that we can check for
	 * "gr", "g'" and "g`".
	 */
	cap->nchar = plain_vgetc();
	LANGMAP_ADJUST(cap->nchar, TRUE);
	*need_flushbuf |= add_to_showcmd(cap->nchar);
	if (cap->nchar == 'r' || cap->nchar == '\'' || cap->nchar == '`'
		|| cap->nchar == Ctrl_BSL)
	{
	    cp = &cap->extra_char;	// need to get a third character
	    if (cap->nchar != 'r')
		lit = TRUE;			// get it literally
	    else
		repl = TRUE;		// get it in replace mode
	}
	else
	    cp = NULL;		// no third character needed
    }
    else
    {
	if (cap->cmdchar == 'r')		// get it in replace mode
	    repl = TRUE;
	cp = &cap->nchar;
    }
    lang = (repl || (nv_cmds[idx].cmd_flags & NV_LANG));

    /*
     * Get a second or third character.
     */
    if (cp != NULL)
    {
	if (repl)
	{
	    State = MODE_REPLACE;	// pretend Replace mode
#ifdef CURSOR_SHAPE
	    ui_cursor_shape();	// show different cursor shape
#endif
	}
	if (lang && curbuf->b_p_iminsert == B_IMODE_LMAP)
	{
	    // Allow mappings defined with ":lmap".
	    --no_mapping;
	    --allow_keys;
	    if (repl)
		State = MODE_LREPLACE;
	    else
		State = MODE_LANGMAP;
	    langmap_active = TRUE;
	}
#ifdef HAVE_INPUT_METHOD
	save_smd = p_smd;
	p_smd = FALSE;	// Don't let the IM code show the mode here
	if (lang && curbuf->b_p_iminsert == B_IMODE_IM)
	    im_set_active(TRUE);
#endif
	if ((State & MODE_INSERT) && !p_ek)
	{
	    MAY_WANT_TO_LOG_THIS;

	    // Disable bracketed paste and modifyOtherKeys here, we won't
	    // recognize the escape sequences with 'esckeys' off.
	    out_str(T_BD);
	    out_str_t_TE();
	}

	*cp = plain_vgetc();

	if ((State & MODE_INSERT) && !p_ek)
	{
	    MAY_WANT_TO_LOG_THIS;

	    // Re-enable bracketed paste mode and modifyOtherKeys
	    out_str_t_BE();
	    out_str_t_TI();
	}

	if (langmap_active)
	{
	    // Undo the decrement done above
	    ++no_mapping;
	    ++allow_keys;
	    State = MODE_NORMAL_BUSY;
	}
#ifdef HAVE_INPUT_METHOD
	if (lang)
	{
	    if (curbuf->b_p_iminsert != B_IMODE_LMAP)
		im_save_status(&curbuf->b_p_iminsert);
	    im_set_active(FALSE);
	}
	p_smd = save_smd;
#endif
	State = MODE_NORMAL_BUSY;
	*need_flushbuf |= add_to_showcmd(*cp);

	if (!lit)
	{
#ifdef FEAT_DIGRAPHS
	    // Typing CTRL-K gets a digraph.
	    if (*cp == Ctrl_K
		    && ((nv_cmds[idx].cmd_flags & NV_LANG)
			|| cp == &cap->extra_char)
		    && vim_strchr(p_cpo, CPO_DIGRAPH) == NULL)
	    {
		c = get_digraph(FALSE);
		if (c > 0)
		{
		    *cp = c;
		    // Guessing how to update showcmd here...
		    del_from_showcmd(3);
		    *need_flushbuf |= add_to_showcmd(*cp);
		}
	    }
#endif

	    // adjust chars > 127, except after "tTfFr" commands
	    LANGMAP_ADJUST(*cp, !lang);
#ifdef FEAT_RIGHTLEFT
	    // adjust Hebrew mapped char
	    if (p_hkmap && lang && KeyTyped)
		*cp = hkmap(*cp);
#endif
	}

	// When the next character is CTRL-\ a following CTRL-N means the
	// command is aborted and we go to Normal mode.
	if (cp == &cap->extra_char
		&& cap->nchar == Ctrl_BSL
		&& (cap->extra_char == Ctrl_N || cap->extra_char == Ctrl_G))
	{
	    cap->cmdchar = Ctrl_BSL;
	    cap->nchar = cap->extra_char;
	    idx = find_command(cap->cmdchar);
	}
	else if ((cap->nchar == 'n' || cap->nchar == 'N') && cap->cmdchar == 'g')
	    cap->oap->op_type = get_op_type(*cp, NUL);
	else if (*cp == Ctrl_BSL)
	{
	    long towait = (p_ttm >= 0 ? p_ttm : p_tm);

	    // There is a busy wait here when typing "f<C-\>" and then
	    // something different from CTRL-N.  Can't be avoided.
	    while ((c = vpeekc()) <= 0 && towait > 0L)
	    {
		do_sleep(towait > 50L ? 50L : towait, FALSE);
		towait -= 50L;
	    }
	    if (c > 0)
	    {
		c = plain_vgetc();
		if (c != Ctrl_N && c != Ctrl_G)
		    vungetc(c);
		else
		{
		    cap->cmdchar = Ctrl_BSL;
		    cap->nchar = c;
		    idx = find_command(cap->cmdchar);
		}
	    }
	}

	// When getting a text character and the next character is a
	// multi-byte character, it could be a composing character.
	// However, don't wait for it to arrive. Also, do enable mapping,
	// because if it's put back with vungetc() it's too late to apply
	// mapping.
	--no_mapping;
	while (enc_utf8 && lang && (c = vpeekc()) > 0
		&& (c >= 0x100 || MB_BYTE2LEN(vpeekc()) > 1))
	{
	    c = plain_vgetc();
	    if (!utf_iscomposing(c))
	    {
		vungetc(c);		// it wasn't, put it back
		break;
	    }
	    else if (cap->ncharC1 == 0)
		cap->ncharC1 = c;
	    else
		cap->ncharC2 = c;
	}
	++no_mapping;
    }
    --no_mapping;
    --allow_keys;

    return idx;
}

/*
 * Returns TRUE if after processing a normal mode command, need to wait for a
 * moment when a message is displayed that will be overwritten by the mode
 * message.
 */
    static int
normal_cmd_need_to_wait_for_msg(cmdarg_T *cap, pos_T *old_pos)
{
    // In Visual mode and with "^O" in Insert mode, a short message will be
    // overwritten by the mode message.  Wait a bit, until a key is hit.
    // In Visual mode, it's more important to keep the Visual area updated
    // than keeping a message (e.g. from a /pat search).
    // Only do this if the command was typed, not from a mapping.
    // Don't wait when emsg_silent is non-zero.
    // Also wait a bit after an error message, e.g. for "^O:".
    // Don't redraw the screen, it would remove the message.
    return (       ((p_smd
		    && msg_silent == 0
		    && (restart_edit != 0
			|| (VIsual_active
			    && old_pos->lnum == curwin->w_cursor.lnum
			    && old_pos->col == curwin->w_cursor.col)
		       )
		    && (clear_cmdline
			|| redraw_cmdline)
		    && (msg_didout || (msg_didany && msg_scroll))
		    && !msg_nowait
		    && KeyTyped)
		|| (restart_edit != 0
		    && !VIsual_active
		    && (msg_scroll
			|| emsg_on_display)))
	    && cap->oap->regname == 0
	    && !(cap->retval & CA_COMMAND_BUSY)
	    && stuff_empty()
	    && typebuf_typed()
	    && emsg_silent == 0
	    && !in_assert_fails
	    && !did_wait_return
	    && cap->oap->op_type == OP_NOP);
}

/*
 * After processing a normal mode command, wait for a moment when a message is
 * displayed that will be overwritten by the mode message.
 */
    static void
normal_cmd_wait_for_msg(void)
{
    int	save_State = State;

    // Draw the cursor with the right shape here
    if (restart_edit != 0)
	State = MODE_INSERT;

    // If need to redraw, and there is a "keep_msg", redraw before the
    // delay
    if (must_redraw && keep_msg != NULL && !emsg_on_display)
    {
	char_u	*kmsg;

	kmsg = keep_msg;
	keep_msg = NULL;
	// Showmode() will clear keep_msg, but we want to use it anyway.
	// First update w_topline.
	setcursor();
	update_screen(0);
	// now reset it, otherwise it's put in the history again
	keep_msg = kmsg;

	kmsg = vim_strsave(keep_msg);
	if (kmsg != NULL)
	{
	    msg_attr((char *)kmsg, keep_msg_attr);
	    vim_free(kmsg);
	}
    }
    setcursor();
#ifdef CURSOR_SHAPE
    ui_cursor_shape();		// may show different cursor shape
#endif
    cursor_on();
    out_flush();
    if (msg_scroll || emsg_on_display)
	ui_delay(1003L, TRUE);	// wait at least one second
    ui_delay(3003L, FALSE);		// wait up to three seconds
    State = save_State;

    msg_scroll = FALSE;
    emsg_on_display = FALSE;
}

/*
 * Execute a command in Normal mode.
 */
    void
normal_cmd(
    oparg_T	*oap,
    int		toplevel UNUSED)	// TRUE when called from main()
{
    cmdarg_T	ca;			// command arguments
    int		c;
    int		ctrl_w = FALSE;		// got CTRL-W command
    int		old_col = curwin->w_curswant;
    int		need_flushbuf = FALSE;	// need to call out_flush()
    pos_T	old_pos;		// cursor position before command
    int		mapped_len;
    static int	old_mapped_len = 0;
    int		idx;
    int		set_prevcount = FALSE;
    int		save_did_cursorhold = did_cursorhold;

    CLEAR_FIELD(ca);	// also resets ca.retval
    ca.oap = oap;

    // Use a count remembered from before entering an operator.  After typing
    // "3d" we return from normal_cmd() and come back here, the "3" is
    // remembered in "opcount".
    ca.opcount = opcount;

    // If there is an operator pending, then the command we take this time
    // will terminate it. Finish_op tells us to finish the operation before
    // returning this time (unless the operation was cancelled).
#ifdef CURSOR_SHAPE
    c = finish_op;
#endif
    finish_op = (oap->op_type != OP_NOP);
#ifdef CURSOR_SHAPE
    if (finish_op != c)
    {
	ui_cursor_shape();		// may show different cursor shape
# ifdef FEAT_MOUSESHAPE
	update_mouseshape(-1);
# endif
    }
#endif
    may_trigger_modechanged();

    // When not finishing an operator and no register name typed, reset the
    // count.
    if (!finish_op && !oap->regname)
    {
	ca.opcount = 0;
#ifdef FEAT_EVAL
	set_prevcount = TRUE;
#endif
    }

    // Restore counts from before receiving K_CURSORHOLD.  This means after
    // typing "3", handling K_CURSORHOLD and then typing "2" we get "32", not
    // "3 * 2".
    if (oap->prev_opcount > 0 || oap->prev_count0 > 0)
    {
	ca.opcount = oap->prev_opcount;
	ca.count0 = oap->prev_count0;
	oap->prev_opcount = 0;
	oap->prev_count0 = 0;
    }

    mapped_len = typebuf_maplen();

    State = MODE_NORMAL_BUSY;
#ifdef USE_ON_FLY_SCROLL
    dont_scroll = FALSE;	// allow scrolling here
#endif

#ifdef FEAT_EVAL
    // Set v:count here, when called from main() and not a stuffed
    // command, so that v:count can be used in an expression mapping
    // when there is no count. Do set it for redo.
    if (toplevel && readbuf1_empty())
	set_vcount_ca(&ca, &set_prevcount);
#endif

    /*
     * Get the command character from the user.
     */
    c = safe_vgetc();
    LANGMAP_ADJUST(c, get_real_state() != MODE_SELECT);

    // If a mapping was started in Visual or Select mode, remember the length
    // of the mapping.  This is used below to not return to Insert mode for as
    // long as the mapping is being executed.
    if (restart_edit == 0)
	old_mapped_len = 0;
    else if (old_mapped_len
		|| (VIsual_active && mapped_len == 0 && typebuf_maplen() > 0))
	old_mapped_len = typebuf_maplen();

    if (c == NUL)
	c = K_ZERO;

    // In Select mode, typed text replaces the selection.
    if (VIsual_active
	    && VIsual_select
	    && (vim_isprintc(c) || c == NL || c == CAR || c == K_KENTER))
    {
	int len;

	// Fake a "c"hange command.  When "restart_edit" is set (e.g., because
	// 'insertmode' is set) fake a "d"elete command, Insert mode will
	// restart automatically.
	// Insert the typed character in the typeahead buffer, so that it can
	// be mapped in Insert mode.  Required for ":lmap" to work.
	len = ins_char_typebuf(vgetc_char, vgetc_mod_mask);

	// When recording and gotchars() was called the character will be
	// recorded again, remove the previous recording.
	if (KeyTyped)
	    ungetchars(len);

	if (restart_edit != 0)
	    c = 'd';
	else
	    c = 'c';
	msg_nowait = TRUE;	// don't delay going to insert mode
	old_mapped_len = 0;	// do go to Insert mode
    }

    // If the window was made so small that nothing shows, make it at least one
    // line and one column when typing a command.
    if (KeyTyped && !KeyStuffed)
	win_ensure_size();

    need_flushbuf = add_to_showcmd(c);

    // Get the command count
    c = normal_cmd_get_count(&ca, c, toplevel, set_prevcount, &ctrl_w,
							&need_flushbuf);

    // Find the command character in the table of commands.
    // For CTRL-W we already got nchar when looking for a count.
    if (ctrl_w)
    {
	ca.nchar = c;
	ca.cmdchar = Ctrl_W;
    }
    else
	ca.cmdchar = c;
    idx = find_command(ca.cmdchar);
    if (idx < 0)
    {
	// Not a known command: beep.
	clearopbeep(oap);
	goto normal_end;
    }

    if ((nv_cmds[idx].cmd_flags & NV_NCW) && check_text_or_curbuf_locked(oap))
	// this command is not allowed now
	goto normal_end;

    // In Visual/Select mode, a few keys are handled in a special way.
    if (VIsual_active)
    {
	// when 'keymodel' contains "stopsel" may stop Select/Visual mode
	if (km_stopsel
		&& (nv_cmds[idx].cmd_flags & NV_STS)
		&& !(mod_mask & MOD_MASK_SHIFT))
	{
	    end_visual_mode();
	    redraw_curbuf_later(UPD_INVERTED);
	}

	// Keys that work different when 'keymodel' contains "startsel"
	if (km_startsel)
	{
	    if (nv_cmds[idx].cmd_flags & NV_SS)
	    {
		unshift_special(&ca);
		idx = find_command(ca.cmdchar);
		if (idx < 0)
		{
		    // Just in case
		    clearopbeep(oap);
		    goto normal_end;
		}
	    }
	    else if ((nv_cmds[idx].cmd_flags & NV_SSS)
					       && (mod_mask & MOD_MASK_SHIFT))
		mod_mask &= ~MOD_MASK_SHIFT;
	}
    }

#ifdef FEAT_RIGHTLEFT
    if (curwin->w_p_rl && KeyTyped && !KeyStuffed
					  && (nv_cmds[idx].cmd_flags & NV_RL))
    {
	// Invert horizontal movements and operations.  Only when typed by the
	// user directly, not when the result of a mapping or "x" translated
	// to "dl".
	switch (ca.cmdchar)
	{
	    case 'l':	    ca.cmdchar = 'h'; break;
	    case K_RIGHT:   ca.cmdchar = K_LEFT; break;
	    case K_S_RIGHT: ca.cmdchar = K_S_LEFT; break;
	    case K_C_RIGHT: ca.cmdchar = K_C_LEFT; break;
	    case 'h':	    ca.cmdchar = 'l'; break;
	    case K_LEFT:    ca.cmdchar = K_RIGHT; break;
	    case K_S_LEFT:  ca.cmdchar = K_S_RIGHT; break;
	    case K_C_LEFT:  ca.cmdchar = K_C_RIGHT; break;
	    case '>':	    ca.cmdchar = '<'; break;
	    case '<':	    ca.cmdchar = '>'; break;
	}
	idx = find_command(ca.cmdchar);
    }
#endif

    // Get additional characters if we need them.
    if (normal_cmd_needs_more_chars(&ca, nv_cmds[idx].cmd_flags))
	idx = normal_cmd_get_more_chars(idx, &ca, &need_flushbuf);

    // Flush the showcmd characters onto the screen so we can see them while
    // the command is being executed.  Only do this when the shown command was
    // actually displayed, otherwise this will slow down a lot when executing
    // mappings.
    if (need_flushbuf)
	out_flush();

    if (ca.cmdchar != K_IGNORE)
    {
	if (ex_normal_busy)
	    did_cursorhold = save_did_cursorhold;
	else
	    did_cursorhold = FALSE;
    }

    State = MODE_NORMAL;

    if (ca.nchar == ESC)
    {
	clearop(oap);
	if (restart_edit == 0 && goto_im())
	    restart_edit = 'a';
	goto normal_end;
    }

    if (ca.cmdchar != K_IGNORE)
    {
	msg_didout = FALSE;    // don't scroll screen up for normal command
	msg_col = 0;
    }

    old_pos = curwin->w_cursor;		// remember where cursor was

    // When 'keymodel' contains "startsel" some keys start Select/Visual
    // mode.
    if (!VIsual_active && km_startsel)
    {
	if (nv_cmds[idx].cmd_flags & NV_SS)
	{
	    start_selection();
	    unshift_special(&ca);
	    idx = find_command(ca.cmdchar);
	}
	else if ((nv_cmds[idx].cmd_flags & NV_SSS)
					   && (mod_mask & MOD_MASK_SHIFT))
	{
	    start_selection();
	    mod_mask &= ~MOD_MASK_SHIFT;
	}
    }

    // Execute the command!
    // Call the command function found in the commands table.
    ca.arg = nv_cmds[idx].cmd_arg;
    (nv_cmds[idx].cmd_func)(&ca);

    // If we didn't start or finish an operator, reset oap->regname, unless we
    // need it later.
    if (!finish_op
	    && !oap->op_type
	    && (idx < 0 || !(nv_cmds[idx].cmd_flags & NV_KEEPREG)))
    {
	clearop(oap);
#ifdef FEAT_EVAL
	reset_reg_var();
#endif
    }

    // Get the length of mapped chars again after typing a count, second
    // character or "z333<cr>".
    if (old_mapped_len > 0)
	old_mapped_len = typebuf_maplen();

    // If an operation is pending, handle it.  But not for K_IGNORE or
    // K_MOUSEMOVE.
    if (ca.cmdchar != K_IGNORE && ca.cmdchar != K_MOUSEMOVE)
	do_pending_operator(&ca, old_col, FALSE);

    // Wait for a moment when a message is displayed that will be overwritten
    // by the mode message.
    if (normal_cmd_need_to_wait_for_msg(&ca, &old_pos))
	normal_cmd_wait_for_msg();

    // Finish up after executing a Normal mode command.
normal_end:

    msg_nowait = FALSE;

#ifdef FEAT_EVAL
    if (finish_op)
	reset_reg_var();
#endif

    // Reset finish_op, in case it was set
#ifdef CURSOR_SHAPE
    int prev_finish_op = finish_op;
#endif
    finish_op = FALSE;
    may_trigger_modechanged();
#ifdef CURSOR_SHAPE
    // Redraw the cursor with another shape, if we were in Operator-pending
    // mode or did a replace command.
    if (prev_finish_op || ca.cmdchar == 'r')
    {
	ui_cursor_shape();		// may show different cursor shape
# ifdef FEAT_MOUSESHAPE
	update_mouseshape(-1);
# endif
    }
#endif

    if (oap->op_type == OP_NOP && oap->regname == 0
	    && ca.cmdchar != K_CURSORHOLD)
	clear_showcmd();

    checkpcmark();		// check if we moved since setting pcmark
    vim_free(ca.searchbuf);

    if (has_mbyte)
	mb_adjust_cursor();

    if (curwin->w_p_scb && toplevel)
    {
	validate_cursor();	// may need to update w_leftcol
	do_check_scrollbind(TRUE);
    }

    if (curwin->w_p_crb && toplevel)
    {
	validate_cursor();	// may need to update w_leftcol
	do_check_cursorbind();
    }

#ifdef FEAT_TERMINAL
    // don't go to Insert mode if a terminal has a running job
    if (term_job_running(curbuf->b_term))
	restart_edit = 0;
#endif

    // May restart edit(), if we got here with CTRL-O in Insert mode (but not
    // if still inside a mapping that started in Visual mode).
    // May switch from Visual to Select mode after CTRL-O command.
    if (       oap->op_type == OP_NOP
	    && ((restart_edit != 0 && !VIsual_active && old_mapped_len == 0)
		|| restart_VIsual_select == 1)
	    && !(ca.retval & CA_COMMAND_BUSY)
	    && stuff_empty()
	    && oap->regname == 0)
    {
	if (restart_VIsual_select == 1)
	{
	    VIsual_select = TRUE;
	    may_trigger_modechanged();
	    showmode();
	    restart_VIsual_select = 0;
	    VIsual_select_reg = 0;
	}
	if (restart_edit != 0 && !VIsual_active && old_mapped_len == 0)
	    (void)edit(restart_edit, FALSE, 1L);
    }

    if (restart_VIsual_select == 2)
	restart_VIsual_select = 1;

    // Save count before an operator for next time.
    opcount = ca.opcount;
}

#ifdef FEAT_EVAL
/*
 * Set v:count and v:count1 according to "cap".
 * Set v:prevcount only when "set_prevcount" is TRUE.
 */
    static void
set_vcount_ca(cmdarg_T *cap, int *set_prevcount)
{
    long count = cap->count0;

    // multiply with cap->opcount the same way as above
    if (cap->opcount != 0)
	count = cap->opcount * (count == 0 ? 1 : count);
    set_vcount(count, count == 0 ? 1 : count, *set_prevcount);
    *set_prevcount = FALSE;  // only set v:prevcount once
}
#endif

/*
 * Check if highlighting for Visual mode is possible, give a warning message
 * if not.
 */
    void
check_visual_highlight(void)
{
    static int	    did_check = FALSE;

    if (full_screen)
    {
	if (!did_check && HL_ATTR(HLF_V) == 0)
	    msg(_("Warning: terminal cannot highlight"));
	did_check = TRUE;
    }
}

#if defined(FEAT_CLIPBOARD) && defined(FEAT_EVAL)
/*
 * Call yank_do_autocmd() for "regname".
 */
    static void
call_yank_do_autocmd(int regname)
{
    oparg_T	oa;
    yankreg_T	*reg;

    clear_oparg(&oa);
    oa.regname = regname;
    oa.op_type = OP_YANK;
    oa.is_VIsual = TRUE;
    reg = get_register(regname, TRUE);
    yank_do_autocmd(&oa, reg);
    free_register(reg);
}
#endif

/*
 * End Visual mode.
 * This function or the next should ALWAYS be called to end Visual mode, except
 * from do_pending_operator().
 */
    void
end_visual_mode(void)
{
    end_visual_mode_keep_button();
    reset_held_button();
}

    void
end_visual_mode_keep_button(void)
{
#ifdef FEAT_CLIPBOARD
    // If we are using the clipboard, then remember what was selected in case
    // we need to paste it somewhere while we still own the selection.
    // Only do this when the clipboard is already owned.  Don't want to grab
    // the selection when hitting ESC.
    if (clip_star.available && clip_star.owned)
	clip_auto_select();

# if defined(FEAT_EVAL)
    // Emit a TextYankPost for the automatic copy of the selection into the
    // star and/or plus register.
    if (has_textyankpost())
    {
	if (clip_isautosel_star())
	    call_yank_do_autocmd('*');
	if (clip_isautosel_plus())
	    call_yank_do_autocmd('+');
    }
# endif
#endif

    VIsual_active = FALSE;
    setmouse();
    mouse_dragging = 0;

    // Save the current VIsual area for '< and '> marks, and "gv"
    curbuf->b_visual.vi_mode = VIsual_mode;
    curbuf->b_visual.vi_start = VIsual;
    curbuf->b_visual.vi_end = curwin->w_cursor;
    curbuf->b_visual.vi_curswant = curwin->w_curswant;
#ifdef FEAT_EVAL
    curbuf->b_visual_mode_eval = VIsual_mode;
#endif
    if (!virtual_active())
	curwin->w_cursor.coladd = 0;
    may_clear_cmdline();

    adjust_cursor_eol();
    may_trigger_modechanged();
}

/*
 * Reset VIsual_active and VIsual_reselect.
 */
    void
reset_VIsual_and_resel(void)
{
    if (VIsual_active)
    {
	end_visual_mode();
	redraw_curbuf_later(UPD_INVERTED);	// delete the inversion later
    }
    VIsual_reselect = FALSE;
}

/*
 * Reset VIsual_active and VIsual_reselect if it's set.
 */
    void
reset_VIsual(void)
{
    if (VIsual_active)
    {
	end_visual_mode();
	redraw_curbuf_later(UPD_INVERTED);	// delete the inversion later
	VIsual_reselect = FALSE;
    }
}

    void
restore_visual_mode(void)
{
    if (VIsual_mode_orig != NUL)
    {
	curbuf->b_visual.vi_mode = VIsual_mode_orig;
	VIsual_mode_orig = NUL;
    }
}

/*
 * Check for a balloon-eval special item to include when searching for an
 * identifier.  When "dir" is BACKWARD "ptr[-1]" must be valid!
 * Returns TRUE if the character at "*ptr" should be included.
 * "dir" is FORWARD or BACKWARD, the direction of searching.
 * "*colp" is in/decremented if "ptr[-dir]" should also be included.
 * "bnp" points to a counter for square brackets.
 */
    static int
find_is_eval_item(
    char_u	*ptr,
    int		*colp,
    int		*bnp,
    int		dir)
{
    // Accept everything inside [].
    if ((*ptr == ']' && dir == BACKWARD) || (*ptr == '[' && dir == FORWARD))
	++*bnp;
    if (*bnp > 0)
    {
	if ((*ptr == '[' && dir == BACKWARD) || (*ptr == ']' && dir == FORWARD))
	    --*bnp;
	return TRUE;
    }

    // skip over "s.var"
    if (*ptr == '.')
	return TRUE;

    // two-character item: s->var
    if (ptr[dir == BACKWARD ? 0 : 1] == '>'
	    && ptr[dir == BACKWARD ? -1 : 0] == '-')
    {
	*colp += dir;
	return TRUE;
    }
    return FALSE;
}

/*
 * Find the identifier under or to the right of the cursor.
 * "find_type" can have one of three values:
 * FIND_IDENT:   find an identifier (keyword)
 * FIND_STRING:  find any non-white text
 * FIND_IDENT + FIND_STRING: find any non-white text, identifier preferred.
 * FIND_EVAL:	 find text useful for C program debugging
 *
 * There are three steps:
 * 1. Search forward for the start of an identifier/text.  Doesn't move if
 *    already on one.
 * 2. Search backward for the start of this identifier/text.
 *    This doesn't match the real Vi but I like it a little better and it
 *    shouldn't bother anyone.
 * 3. Search forward to the end of this identifier/text.
 *    When FIND_IDENT isn't defined, we backup until a blank.
 *
 * Returns the length of the text, or zero if no text is found.
 * If text is found, a pointer to the text is put in "*text".  This
 * points into the current buffer line and is not always NUL terminated.
 */
    int
find_ident_under_cursor(char_u **text, int find_type)
{
    return find_ident_at_pos(curwin, curwin->w_cursor.lnum,
				curwin->w_cursor.col, text, NULL, find_type);
}

/*
 * Like find_ident_under_cursor(), but for any window and any position.
 * However: Uses 'iskeyword' from the current window!.
 */
    int
find_ident_at_pos(
    win_T	*wp,
    linenr_T	lnum,
    colnr_T	startcol,
    char_u	**text,
    int		*textcol,	// column where "text" starts, can be NULL
    int		find_type)
{
    char_u	*ptr;
    int		col = 0;	// init to shut up GCC
    int		i;
    int		this_class = 0;
    int		prev_class;
    int		prevcol;
    int		bn = 0;		// bracket nesting

    // if i == 0: try to find an identifier
    // if i == 1: try to find any non-white text
    ptr = ml_get_buf(wp->w_buffer, lnum, FALSE);
    for (i = (find_type & FIND_IDENT) ? 0 : 1;	i < 2; ++i)
    {
	/*
	 * 1. skip to start of identifier/text
	 */
	col = startcol;
	if (has_mbyte)
	{
	    while (ptr[col] != NUL)
	    {
		// Stop at a ']' to evaluate "a[x]".
		if ((find_type & FIND_EVAL) && ptr[col] == ']')
		    break;
		this_class = mb_get_class(ptr + col);
		if (this_class != 0 && (i == 1 || this_class != 1))
		    break;
		col += (*mb_ptr2len)(ptr + col);
	    }
	}
	else
	    while (ptr[col] != NUL
		    && (i == 0 ? !vim_iswordc(ptr[col]) : VIM_ISWHITE(ptr[col]))
		    && (!(find_type & FIND_EVAL) || ptr[col] != ']')
		    )
		++col;

	// When starting on a ']' count it, so that we include the '['.
	bn = ptr[col] == ']';

	/*
	 * 2. Back up to start of identifier/text.
	 */
	if (has_mbyte)
	{
	    // Remember class of character under cursor.
	    if ((find_type & FIND_EVAL) && ptr[col] == ']')
		this_class = mb_get_class((char_u *)"a");
	    else
		this_class = mb_get_class(ptr + col);
	    while (col > 0 && this_class != 0)
	    {
		prevcol = col - 1 - (*mb_head_off)(ptr, ptr + col - 1);
		prev_class = mb_get_class(ptr + prevcol);
		if (this_class != prev_class
			&& (i == 0
			    || prev_class == 0
			    || (find_type & FIND_IDENT))
			&& (!(find_type & FIND_EVAL)
			    || prevcol == 0
			    || !find_is_eval_item(ptr + prevcol, &prevcol,
							       &bn, BACKWARD))
			)
		    break;
		col = prevcol;
	    }

	    // If we don't want just any old text, or we've found an
	    // identifier, stop searching.
	    if (this_class > 2)
		this_class = 2;
	    if (!(find_type & FIND_STRING) || this_class == 2)
		break;
	}
	else
	{
	    while (col > 0
		    && ((i == 0
			    ? vim_iswordc(ptr[col - 1])
			    : (!VIM_ISWHITE(ptr[col - 1])
				&& (!(find_type & FIND_IDENT)
				    || !vim_iswordc(ptr[col - 1]))))
			|| ((find_type & FIND_EVAL)
			    && col > 1
			    && find_is_eval_item(ptr + col - 1, &col,
							       &bn, BACKWARD))
			))
		--col;

	    // If we don't want just any old text, or we've found an
	    // identifier, stop searching.
	    if (!(find_type & FIND_STRING) || vim_iswordc(ptr[col]))
		break;
	}
    }

    if (ptr[col] == NUL || (i == 0
		&& (has_mbyte ? this_class != 2 : !vim_iswordc(ptr[col]))))
    {
	// didn't find an identifier or text
	if ((find_type & FIND_NOERROR) == 0)
	{
	    if (find_type & FIND_STRING)
		emsg(_(e_no_string_under_cursor));
	    else
		emsg(_(e_no_identifier_under_cursor));
	}
	return 0;
    }
    ptr += col;
    *text = ptr;
    if (textcol != NULL)
	*textcol = col;

    /*
     * 3. Find the end if the identifier/text.
     */
    bn = 0;
    startcol -= col;
    col = 0;
    if (has_mbyte)
    {
	// Search for point of changing multibyte character class.
	this_class = mb_get_class(ptr);
	while (ptr[col] != NUL
		&& ((i == 0 ? mb_get_class(ptr + col) == this_class
			    : mb_get_class(ptr + col) != 0)
		    || ((find_type & FIND_EVAL)
			&& col <= (int)startcol
			&& find_is_eval_item(ptr + col, &col, &bn, FORWARD))
		))
	    col += (*mb_ptr2len)(ptr + col);
    }
    else
	while ((i == 0 ? vim_iswordc(ptr[col])
		       : (ptr[col] != NUL && !VIM_ISWHITE(ptr[col])))
		    || ((find_type & FIND_EVAL)
			&& col <= (int)startcol
			&& find_is_eval_item(ptr + col, &col, &bn, FORWARD))
		)
	    ++col;

    return col;
}

/*
 * Prepare for redo of a normal command.
 */
    static void
prep_redo_cmd(cmdarg_T *cap)
{
    prep_redo(cap->oap->regname, cap->count0,
				     NUL, cap->cmdchar, NUL, NUL, cap->nchar);
}

/*
 * Prepare for redo of any command.
 * Note that only the last argument can be a multi-byte char.
 */
    void
prep_redo(
    int	    regname,
    long    num,
    int	    cmd1,
    int	    cmd2,
    int	    cmd3,
    int	    cmd4,
    int	    cmd5)
{
    prep_redo_num2(regname, num, cmd1, cmd2, 0L, cmd3, cmd4, cmd5);
}

/*
 * Prepare for redo of any command with extra count after "cmd2".
 */
    void
prep_redo_num2(
    int	    regname,
    long    num1,
    int	    cmd1,
    int	    cmd2,
    long    num2,
    int	    cmd3,
    int	    cmd4,
    int	    cmd5)
{
    ResetRedobuff();

#ifdef FEAT_EVAL
    // Put info about a mapping in the redo buffer, so that "." will use the
    // same script context.
    may_add_last_used_map_to_redobuff();
#endif

    if (regname != 0)	// yank from specified buffer
    {
	AppendCharToRedobuff('"');
	AppendCharToRedobuff(regname);
    }
    if (num1 != 0)
	AppendNumberToRedobuff(num1);
    if (cmd1 != NUL)
	AppendCharToRedobuff(cmd1);
    if (cmd2 != NUL)
	AppendCharToRedobuff(cmd2);
    if (num2 != 0)
	AppendNumberToRedobuff(num2);
    if (cmd3 != NUL)
	AppendCharToRedobuff(cmd3);
    if (cmd4 != NUL)
	AppendCharToRedobuff(cmd4);
    if (cmd5 != NUL)
	AppendCharToRedobuff(cmd5);
}

/*
 * check for operator active and clear it
 *
 * return TRUE if operator was active
 */
    static int
checkclearop(oparg_T *oap)
{
    if (oap->op_type == OP_NOP)
	return FALSE;
    clearopbeep(oap);
    return TRUE;
}

/*
 * Check for operator or Visual active.  Clear active operator.
 *
 * Return TRUE if operator or Visual was active.
 */
    static int
checkclearopq(oparg_T *oap)
{
    if (oap->op_type == OP_NOP && !VIsual_active)
	return FALSE;
    clearopbeep(oap);
    return TRUE;
}

    void
clearop(oparg_T *oap)
{
    oap->op_type = OP_NOP;
    oap->regname = 0;
    oap->motion_force = NUL;
    oap->use_reg_one = FALSE;
    motion_force = NUL;
}

    void
clearopbeep(oparg_T *oap)
{
    clearop(oap);
    beep_flush();
}

/*
 * Remove the shift modifier from a special key.
 */
    static void
unshift_special(cmdarg_T *cap)
{
    switch (cap->cmdchar)
    {
	case K_S_RIGHT:	cap->cmdchar = K_RIGHT; break;
	case K_S_LEFT:	cap->cmdchar = K_LEFT; break;
	case K_S_UP:	cap->cmdchar = K_UP; break;
	case K_S_DOWN:	cap->cmdchar = K_DOWN; break;
	case K_S_HOME:	cap->cmdchar = K_HOME; break;
	case K_S_END:	cap->cmdchar = K_END; break;
    }
    cap->cmdchar = simplify_key(cap->cmdchar, &mod_mask);
}

/*
 * If the mode is currently displayed clear the command line or update the
 * command displayed.
 */
    void
may_clear_cmdline(void)
{
    if (mode_displayed)
	clear_cmdline = TRUE;   // unshow visual mode later
    else
	clear_showcmd();
}

/*
 * Routines for displaying a partly typed command
 */

static char_u	old_showcmd_buf[SHOWCMD_BUFLEN];  // For push_showcmd()
static int	showcmd_is_clear = TRUE;
static int	showcmd_visual = FALSE;

static void display_showcmd(void);

    void
clear_showcmd(void)
{
    if (!p_sc)
	return;

    if (VIsual_active && !char_avail())
    {
	int		cursor_bot = LT_POS(VIsual, curwin->w_cursor);
	long		lines;
	colnr_T		leftcol, rightcol;
	linenr_T	top, bot;

	// Show the size of the Visual area.
	if (cursor_bot)
	{
	    top = VIsual.lnum;
	    bot = curwin->w_cursor.lnum;
	}
	else
	{
	    top = curwin->w_cursor.lnum;
	    bot = VIsual.lnum;
	}
# ifdef FEAT_FOLDING
	// Include closed folds as a whole.
	(void)hasFolding(top, &top, NULL);
	(void)hasFolding(bot, NULL, &bot);
# endif
	lines = bot - top + 1;

	if (VIsual_mode == Ctrl_V)
	{
# ifdef FEAT_LINEBREAK
	    char_u *saved_sbr = p_sbr;
	    char_u *saved_w_sbr = curwin->w_p_sbr;

	    // Make 'sbr' empty for a moment to get the correct size.
	    p_sbr = empty_option;
	    curwin->w_p_sbr = empty_option;
# endif
	    getvcols(curwin, &curwin->w_cursor, &VIsual, &leftcol, &rightcol);
# ifdef FEAT_LINEBREAK
	    p_sbr = saved_sbr;
	    curwin->w_p_sbr = saved_w_sbr;
# endif
	    sprintf((char *)showcmd_buf, "%ldx%ld", lines,
					      (long)(rightcol - leftcol + 1));
	}
	else if (VIsual_mode == 'V' || VIsual.lnum != curwin->w_cursor.lnum)
	    sprintf((char *)showcmd_buf, "%ld", lines);
	else
	{
	    char_u  *s, *e;
	    int	    l;
	    int	    bytes = 0;
	    int	    chars = 0;

	    if (cursor_bot)
	    {
		s = ml_get_pos(&VIsual);
		e = ml_get_cursor();
	    }
	    else
	    {
		s = ml_get_cursor();
		e = ml_get_pos(&VIsual);
	    }
	    while ((*p_sel != 'e') ? s <= e : s < e)
	    {
		l = (*mb_ptr2len)(s);
		if (l == 0)
		{
		    ++bytes;
		    ++chars;
		    break;  // end of line
		}
		bytes += l;
		++chars;
		s += l;
	    }
	    if (bytes == chars)
		sprintf((char *)showcmd_buf, "%d", chars);
	    else
		sprintf((char *)showcmd_buf, "%d-%d", chars, bytes);
	}
	showcmd_buf[SHOWCMD_COLS] = NUL;	// truncate
	showcmd_visual = TRUE;
    }
    else
    {
	showcmd_buf[0] = NUL;
	showcmd_visual = FALSE;

	// Don't actually display something if there is nothing to clear.
	if (showcmd_is_clear)
	    return;
    }

    display_showcmd();
}

/*
 * Add 'c' to string of shown command chars.
 * Return TRUE if output has been written (and setcursor() has been called).
 */
    int
add_to_showcmd(int c)
{
    char_u	*p;
    int		old_len;
    int		extra_len;
    int		overflow;
    int		i;
    static int	ignore[] =
    {
#ifdef FEAT_GUI
	K_VER_SCROLLBAR, K_HOR_SCROLLBAR,
	K_LEFTMOUSE_NM, K_LEFTRELEASE_NM,
#endif
	K_IGNORE, K_PS,
	K_LEFTMOUSE, K_LEFTDRAG, K_LEFTRELEASE, K_MOUSEMOVE,
	K_MIDDLEMOUSE, K_MIDDLEDRAG, K_MIDDLERELEASE,
	K_RIGHTMOUSE, K_RIGHTDRAG, K_RIGHTRELEASE,
	K_MOUSEDOWN, K_MOUSEUP, K_MOUSELEFT, K_MOUSERIGHT,
	K_X1MOUSE, K_X1DRAG, K_X1RELEASE, K_X2MOUSE, K_X2DRAG, K_X2RELEASE,
	K_CURSORHOLD,
	0
    };

    if (!p_sc || msg_silent != 0)
	return FALSE;

    if (showcmd_visual)
    {
	showcmd_buf[0] = NUL;
	showcmd_visual = FALSE;
    }

    // Ignore keys that are scrollbar updates and mouse clicks
    if (IS_SPECIAL(c))
	for (i = 0; ignore[i] != 0; ++i)
	    if (ignore[i] == c)
		return FALSE;

    p = transchar(c);
    if (*p == ' ')
	STRCPY(p, "<20>");
    old_len = (int)STRLEN(showcmd_buf);
    extra_len = (int)STRLEN(p);
    overflow = old_len + extra_len - SHOWCMD_COLS;
    if (overflow > 0)
	mch_memmove(showcmd_buf, showcmd_buf + overflow,
						      old_len - overflow + 1);
    STRCAT(showcmd_buf, p);

    if (char_avail())
	return FALSE;

    display_showcmd();

    return TRUE;
}

    void
add_to_showcmd_c(int c)
{
    if (!add_to_showcmd(c))
	setcursor();
}

/*
 * Delete 'len' characters from the end of the shown command.
 */
    static void
del_from_showcmd(int len)
{
    int	    old_len;

    if (!p_sc)
	return;

    old_len = (int)STRLEN(showcmd_buf);
    if (len > old_len)
	len = old_len;
    showcmd_buf[old_len - len] = NUL;

    if (!char_avail())
	display_showcmd();
}

/*
 * push_showcmd() and pop_showcmd() are used when waiting for the user to type
 * something and there is a partial mapping.
 */
    void
push_showcmd(void)
{
    if (p_sc)
	STRCPY(old_showcmd_buf, showcmd_buf);
}

    void
pop_showcmd(void)
{
    if (!p_sc)
	return;

    STRCPY(showcmd_buf, old_showcmd_buf);

    display_showcmd();
}

    static void
display_showcmd(void)
{
    int	    len = (int)STRLEN(showcmd_buf);

    showcmd_is_clear = (len == 0);
    cursor_off();

    if (*p_sloc == 's')
	win_redr_status(curwin, FALSE);
    else if (*p_sloc == 't')
	draw_tabline();
    else // 'showcmdloc' is "last" or empty
    {
	if (!showcmd_is_clear)
	    screen_puts(showcmd_buf, (int)Rows - 1, sc_col, 0);

	// clear the rest of an old message by outputting up to SHOWCMD_COLS
	// spaces
	screen_puts((char_u *)"          " + len,
						(int)Rows - 1, sc_col + len, 0);
    }

    setcursor();	    // put cursor back where it belongs
}

/*
 * When "check" is FALSE, prepare for commands that scroll the window.
 * When "check" is TRUE, take care of scroll-binding after the window has
 * scrolled.  Called from normal_cmd() and edit().
 */
    void
do_check_scrollbind(int check)
{
    static win_T	*old_curwin = NULL;
    static linenr_T	old_topline = 0;
#ifdef FEAT_DIFF
    static int		old_topfill = 0;
#endif
    static buf_T	*old_buf = NULL;
    static colnr_T	old_leftcol = 0;

    if (check && curwin->w_p_scb)
    {
	// If a ":syncbind" command was just used, don't scroll, only reset
	// the values.
	if (did_syncbind)
	    did_syncbind = FALSE;
	else if (curwin == old_curwin)
	{
	    // Synchronize other windows, as necessary according to
	    // 'scrollbind'.  Don't do this after an ":edit" command, except
	    // when 'diff' is set.
	    if ((curwin->w_buffer == old_buf
#ifdef FEAT_DIFF
			|| curwin->w_p_diff
#endif
		)
		&& (curwin->w_topline != old_topline
#ifdef FEAT_DIFF
			|| curwin->w_topfill != old_topfill
#endif
			|| curwin->w_leftcol != old_leftcol))
	    {
		check_scrollbind(curwin->w_topline - old_topline,
			(long)(curwin->w_leftcol - old_leftcol));
	    }
	}
	else if (vim_strchr(p_sbo, 'j')) // jump flag set in 'scrollopt'
	{
	    // When switching between windows, make sure that the relative
	    // vertical offset is valid for the new window.  The relative
	    // offset is invalid whenever another 'scrollbind' window has
	    // scrolled to a point that would force the current window to
	    // scroll past the beginning or end of its buffer.  When the
	    // resync is performed, some of the other 'scrollbind' windows may
	    // need to jump so that the current window's relative position is
	    // visible on-screen.
	    check_scrollbind(curwin->w_topline - curwin->w_scbind_pos, 0L);
	}
	curwin->w_scbind_pos = curwin->w_topline;
    }

    old_curwin = curwin;
    old_topline = curwin->w_topline;
#ifdef FEAT_DIFF
    old_topfill = curwin->w_topfill;
#endif
    old_buf = curwin->w_buffer;
    old_leftcol = curwin->w_leftcol;
}

/*
 * Synchronize any windows that have "scrollbind" set, based on the
 * number of rows by which the current window has changed
 * (1998-11-02 16:21:01  R. Edward Ralston <eralston@computer.org>)
 */
    void
check_scrollbind(linenr_T topline_diff, long leftcol_diff)
{
    int		want_ver;
    int		want_hor;
    win_T	*old_curwin = curwin;
    buf_T	*old_curbuf = curbuf;
    int		old_VIsual_select = VIsual_select;
    int		old_VIsual_active = VIsual_active;
    colnr_T	tgt_leftcol = curwin->w_leftcol;
    long	topline;
    long	y;

    // check 'scrollopt' string for vertical and horizontal scroll options
    want_ver = (vim_strchr(p_sbo, 'v') && topline_diff != 0);
#ifdef FEAT_DIFF
    want_ver |= old_curwin->w_p_diff;
#endif
    want_hor = (vim_strchr(p_sbo, 'h') && (leftcol_diff || topline_diff != 0));

    // loop through the scrollbound windows and scroll accordingly
    VIsual_select = VIsual_active = 0;
    FOR_ALL_WINDOWS(curwin)
    {
	curbuf = curwin->w_buffer;
	// skip original window and windows with 'noscrollbind'
	if (curwin == old_curwin || !curwin->w_p_scb)
	    continue;

	// do the vertical scroll
	if (want_ver)
	{
#ifdef FEAT_DIFF
	    if (old_curwin->w_p_diff && curwin->w_p_diff)
	    {
		diff_set_topline(old_curwin, curwin);
	    }
	    else
#endif
	    {
		curwin->w_scbind_pos += topline_diff;
		topline = curwin->w_scbind_pos;
		if (topline > curbuf->b_ml.ml_line_count)
		    topline = curbuf->b_ml.ml_line_count;
		if (topline < 1)
		    topline = 1;

		y = topline - curwin->w_topline;
		if (y > 0)
		    scrollup(y, FALSE);
		else
		    scrolldown(-y, FALSE);
	    }

	    redraw_later(UPD_VALID);
	    cursor_correct();
	    curwin->w_redr_status = TRUE;
	}

	// do the horizontal scroll
	if (want_hor)
	    (void)set_leftcol(tgt_leftcol);
    }

    // reset current-window
    VIsual_select = old_VIsual_select;
    VIsual_active = old_VIsual_active;
    curwin = old_curwin;
    curbuf = old_curbuf;
}

/*
 * Command character that's ignored.
 * Used for CTRL-Q and CTRL-S to avoid problems with terminals that use
 * xon/xoff.
 */
    static void
nv_ignore(cmdarg_T *cap)
{
    cap->retval |= CA_COMMAND_BUSY;	// don't call edit() now
}

/*
 * Command character that doesn't do anything, but unlike nv_ignore() does
 * start edit().  Used for "startinsert" executed while starting up.
 */
    static void
nv_nop(cmdarg_T *cap UNUSED)
{
}

/*
 * Command character doesn't exist.
 */
    static void
nv_error(cmdarg_T *cap)
{
    clearopbeep(cap->oap);
}

/*
 * <Help> and <F1> commands.
 */
    static void
nv_help(cmdarg_T *cap)
{
    if (!checkclearopq(cap->oap))
	ex_help(NULL);
}

/*
 * CTRL-A and CTRL-X: Add or subtract from letter or number under cursor.
 */
    static void
nv_addsub(cmdarg_T *cap)
{
#ifdef FEAT_JOB_CHANNEL
    if (bt_prompt(curbuf) && !prompt_curpos_editable())
	clearopbeep(cap->oap);
    else
#endif
    if (!VIsual_active && cap->oap->op_type == OP_NOP)
    {
	prep_redo_cmd(cap);
	cap->oap->op_type = cap->cmdchar == Ctrl_A ?  OP_NR_ADD : OP_NR_SUB;
	op_addsub(cap->oap, cap->count1, cap->arg);
	cap->oap->op_type = OP_NOP;
    }
    else if (VIsual_active)
	nv_operator(cap);
    else
	clearop(cap->oap);
}

/*
 * CTRL-F, CTRL-B, etc: Scroll page up or down.
 */
    static void
nv_page(cmdarg_T *cap)
{
    if (checkclearop(cap->oap))
	return;

    if (mod_mask & MOD_MASK_CTRL)
    {
	// <C-PageUp>: tab page back; <C-PageDown>: tab page forward
	if (cap->arg == BACKWARD)
	    goto_tabpage(-(int)cap->count1);
	else
	    goto_tabpage((int)cap->count0);
    }
    else
	(void)onepage(cap->arg, cap->count1);
}

/*
 * Implementation of "gd" and "gD" command.
 */
    static void
nv_gd(
    oparg_T	*oap,
    int		nchar,
    int		thisblock)	// 1 for "1gd" and "1gD"
{
    int		len;
    char_u	*ptr;

    if ((len = find_ident_under_cursor(&ptr, FIND_IDENT)) == 0
	    || find_decl(ptr, len, nchar == 'd', thisblock, SEARCH_START)
								       == FAIL)
    {
	clearopbeep(oap);
	return;
    }

#ifdef FEAT_FOLDING
    if ((fdo_flags & FDO_SEARCH) && KeyTyped && oap->op_type == OP_NOP)
	foldOpenCursor();
#endif
    // clear any search statistics
    if (messaging() && !msg_silent && !shortmess(SHM_SEARCHCOUNT))
	clear_cmdline = TRUE;
}

/*
 * Return TRUE if line[offset] is not inside a C-style comment or string, FALSE
 * otherwise.
 */
    static int
is_ident(char_u *line, int offset)
{
    int	i;
    int	incomment = FALSE;
    int	instring = 0;
    int	prev = 0;

    for (i = 0; i < offset && line[i] != NUL; i++)
    {
	if (instring != 0)
	{
	    if (prev != '\\' && line[i] == instring)
		instring = 0;
	}
	else if ((line[i] == '"' || line[i] == '\'') && !incomment)
	{
	    instring = line[i];
	}
	else
	{
	    if (incomment)
	    {
		if (prev == '*' && line[i] == '/')
		    incomment = FALSE;
	    }
	    else if (prev == '/' && line[i] == '*')
	    {
		incomment = TRUE;
	    }
	    else if (prev == '/' && line[i] == '/')
	    {
		return FALSE;
	    }
	}

	prev = line[i];
    }

    return incomment == FALSE && instring == 0;
}

/*
 * Search for variable declaration of "ptr[len]".
 * When "locally" is TRUE in the current function ("gd"), otherwise in the
 * current file ("gD").
 * When "thisblock" is TRUE check the {} block scope.
 * Return FAIL when not found.
 */
    int
find_decl(
    char_u	*ptr,
    int		len,
    int		locally,
    int		thisblock,
    int		flags_arg)	// flags passed to searchit()
{
    char_u	*pat;
    pos_T	old_pos;
    pos_T	par_pos;
    pos_T	found_pos;
    int		t;
    int		save_p_ws;
    int		save_p_scs;
    int		retval = OK;
    int		incll;
    int		searchflags = flags_arg;
    int		valid;

    if ((pat = alloc(len + 7)) == NULL)
	return FAIL;

    // Put "\V" before the pattern to avoid that the special meaning of "."
    // and "~" causes trouble.
    sprintf((char *)pat, vim_iswordp(ptr) ? "\\V\\<%.*s\\>" : "\\V%.*s",
								    len, ptr);
    old_pos = curwin->w_cursor;
    save_p_ws = p_ws;
    save_p_scs = p_scs;
    p_ws = FALSE;	// don't wrap around end of file now
    p_scs = FALSE;	// don't switch ignorecase off now

    // With "gD" go to line 1.
    // With "gd" Search back for the start of the current function, then go
    // back until a blank line.  If this fails go to line 1.
    if (!locally || !findpar(&incll, BACKWARD, 1L, '{', FALSE))
    {
	setpcmark();			// Set in findpar() otherwise
	curwin->w_cursor.lnum = 1;
	par_pos = curwin->w_cursor;
    }
    else
    {
	par_pos = curwin->w_cursor;
	while (curwin->w_cursor.lnum > 1 && *skipwhite(ml_get_curline()) != NUL)
	    --curwin->w_cursor.lnum;
    }
    curwin->w_cursor.col = 0;

    // Search forward for the identifier, ignore comment lines.
    CLEAR_POS(&found_pos);
    for (;;)
    {
	t = searchit(curwin, curbuf, &curwin->w_cursor, NULL, FORWARD,
					  pat, 1L, searchflags, RE_LAST, NULL);
	if (curwin->w_cursor.lnum >= old_pos.lnum)
	    t = FAIL;	// match after start is failure too

	if (thisblock && t != FAIL)
	{
	    pos_T	*pos;

	    // Check that the block the match is in doesn't end before the
	    // position where we started the search from.
	    if ((pos = findmatchlimit(NULL, '}', FM_FORWARD,
		     (int)(old_pos.lnum - curwin->w_cursor.lnum + 1))) != NULL
		    && pos->lnum < old_pos.lnum)
	    {
		// There can't be a useful match before the end of this block.
		// Skip to the end.
		curwin->w_cursor = *pos;
		continue;
	    }
	}

	if (t == FAIL)
	{
	    // If we previously found a valid position, use it.
	    if (found_pos.lnum != 0)
	    {
		curwin->w_cursor = found_pos;
		t = OK;
	    }
	    break;
	}
	if (get_leader_len(ml_get_curline(), NULL, FALSE, TRUE) > 0)
	{
	    // Ignore this line, continue at start of next line.
	    ++curwin->w_cursor.lnum;
	    curwin->w_cursor.col = 0;
	    continue;
	}
	valid = is_ident(ml_get_curline(), curwin->w_cursor.col);

	// If the current position is not a valid identifier and a previous
	// match is present, favor that one instead.
	if (!valid && found_pos.lnum != 0)
	{
	    curwin->w_cursor = found_pos;
	    break;
	}

	// Global search: use first valid match found
	if (valid && !locally)
	    break;
	if (valid && curwin->w_cursor.lnum >= par_pos.lnum)
	{
	    // If we previously found a valid position, use it.
	    if (found_pos.lnum != 0)
		curwin->w_cursor = found_pos;
	    break;
	}

	// For finding a local variable and the match is before the "{" or
	// inside a comment, continue searching.  For K&R style function
	// declarations this skips the function header without types.
	if (!valid)
	    CLEAR_POS(&found_pos);
	else
	    found_pos = curwin->w_cursor;
	// Remove SEARCH_START from flags to avoid getting stuck at one
	// position.
	searchflags &= ~SEARCH_START;
    }

    if (t == FAIL)
    {
	retval = FAIL;
	curwin->w_cursor = old_pos;
    }
    else
    {
	curwin->w_set_curswant = TRUE;
	// "n" searches forward now
	reset_search_dir();
    }

    vim_free(pat);
    p_ws = save_p_ws;
    p_scs = save_p_scs;

    return retval;
}

/*
 * Move 'dist' lines in direction 'dir', counting lines by *screen*
 * lines rather than lines in the file.
 * 'dist' must be positive.
 *
 * Return OK if able to move cursor, FAIL otherwise.
 */
    static int
nv_screengo(oparg_T *oap, int dir, long dist)
{
    int		linelen = linetabsize_str(ml_get_curline());
    int		retval = OK;
    int		atend = FALSE;
    int		n;
    int		col_off1;	// margin offset for first screen line
    int		col_off2;	// margin offset for wrapped screen line
    int		width1;		// text width for first screen line
    int		width2;		// text width for wrapped screen line

    oap->motion_type = MCHAR;
    oap->inclusive = (curwin->w_curswant == MAXCOL);

    col_off1 = curwin_col_off();
    col_off2 = col_off1 - curwin_col_off2();
    width1 = curwin->w_width - col_off1;
    width2 = curwin->w_width - col_off2;
    if (width2 == 0)
	width2 = 1; // avoid divide by zero

    if (curwin->w_width != 0)
    {
      // Instead of sticking at the last character of the buffer line we
      // try to stick in the last column of the screen.
      if (curwin->w_curswant == MAXCOL)
      {
	atend = TRUE;
	validate_virtcol();
	if (width1 <= 0)
	    curwin->w_curswant = 0;
	else
	{
	    curwin->w_curswant = width1 - 1;
	    if (curwin->w_virtcol > curwin->w_curswant)
		curwin->w_curswant += ((curwin->w_virtcol
			     - curwin->w_curswant - 1) / width2 + 1) * width2;
	}
      }
      else
      {
	if (linelen > width1)
	    n = ((linelen - width1 - 1) / width2 + 1) * width2 + width1;
	else
	    n = width1;
	if (curwin->w_curswant >= (colnr_T)n)
	    curwin->w_curswant = n - 1;
      }

      while (dist--)
      {
	if (dir == BACKWARD)
	{
	    if ((long)curwin->w_curswant >= width1
#ifdef FEAT_FOLDING
		    && !hasFolding(curwin->w_cursor.lnum, NULL, NULL)
#endif
	       )
		// Move back within the line. This can give a negative value
		// for w_curswant if width1 < width2 (with cpoptions+=n),
		// which will get clipped to column 0.
		curwin->w_curswant -= width2;
	    else
	    {
		// to previous line
		if (!cursor_up_inner(curwin, 1))
		{
		    retval = FAIL;
		    break;
		}
		linelen = linetabsize_str(ml_get_curline());
		if (linelen > width1)
		    curwin->w_curswant += (((linelen - width1 - 1) / width2)
								+ 1) * width2;
	    }
	}
	else // dir == FORWARD
	{
	    if (linelen > width1)
		n = ((linelen - width1 - 1) / width2 + 1) * width2 + width1;
	    else
		n = width1;
	    if (curwin->w_curswant + width2 < (colnr_T)n
#ifdef FEAT_FOLDING
		    && !hasFolding(curwin->w_cursor.lnum, NULL, NULL)
#endif
		    )
		// move forward within line
		curwin->w_curswant += width2;
	    else
	    {
		// to next line
		if (!cursor_down_inner(curwin, 1))
		{
		    retval = FAIL;
		    break;
		}
		curwin->w_curswant %= width2;
		// Check if the cursor has moved below the number display
		// when width1 < width2 (with cpoptions+=n). Subtract width2
		// to get a negative value for w_curswant, which will get
		// clipped to column 0.
		if (curwin->w_curswant >= width1)
		    curwin->w_curswant -= width2;
		linelen = linetabsize_str(ml_get_curline());
	    }
	}
      }
    }

    if (virtual_active() && atend)
	coladvance(MAXCOL);
    else
	coladvance(curwin->w_curswant);

    if (curwin->w_cursor.col > 0 && curwin->w_p_wrap)
    {
	colnr_T virtcol;
	int	c;

	// Check for landing on a character that got split at the end of the
	// last line.  We want to advance a screenline, not end up in the same
	// screenline or move two screenlines.
	validate_virtcol();
	virtcol = curwin->w_virtcol;
#if defined(FEAT_LINEBREAK)
	if (virtcol > (colnr_T)width1 && *get_showbreak_value(curwin) != NUL)
	    virtcol -= vim_strsize(get_showbreak_value(curwin));
#endif

	c = (*mb_ptr2char)(ml_get_cursor());
	if (dir == FORWARD && virtcol < curwin->w_curswant
		&& (curwin->w_curswant <= (colnr_T)width1)
		&& !vim_isprintc(c) && c > 255)
	    oneright();

	if (virtcol > curwin->w_curswant
		&& (curwin->w_curswant < (colnr_T)width1
		    ? (curwin->w_curswant > (colnr_T)width1 / 2)
		    : ((curwin->w_curswant - width1) % width2
						      > (colnr_T)width2 / 2)))
	    --curwin->w_cursor.col;
    }

    if (atend)
	curwin->w_curswant = MAXCOL;	    // stick in the last column
    adjust_skipcol();

    return retval;
}

/*
 * Handle CTRL-E and CTRL-Y commands: scroll a line up or down.
 * cap->arg must be TRUE for CTRL-E.
 */
    void
nv_scroll_line(cmdarg_T *cap)
{
    if (!checkclearop(cap->oap))
	scroll_redraw(cap->arg, cap->count1);
}

/*
 * Scroll "count" lines up or down, and redraw.
 */
    void
scroll_redraw(int up, long count)
{
    linenr_T	prev_topline = curwin->w_topline;
    int		prev_skipcol = curwin->w_skipcol;
#ifdef FEAT_DIFF
    int		prev_topfill = curwin->w_topfill;
#endif
    linenr_T	prev_lnum = curwin->w_cursor.lnum;

    if (up)
	scrollup(count, TRUE);
    else
	scrolldown(count, TRUE);
    if (get_scrolloff_value() > 0)
    {
	// Adjust the cursor position for 'scrolloff'.  Mark w_topline as
	// valid, otherwise the screen jumps back at the end of the file.
	cursor_correct();
	check_cursor_moved(curwin);
	curwin->w_valid |= VALID_TOPLINE;

	// If moved back to where we were, at least move the cursor, otherwise
	// we get stuck at one position.  Don't move the cursor up if the
	// first line of the buffer is already on the screen
	while (curwin->w_topline == prev_topline
		&& curwin->w_skipcol == prev_skipcol
#ifdef FEAT_DIFF
		&& curwin->w_topfill == prev_topfill
#endif
		)
	{
	    if (up)
	    {
		if (curwin->w_cursor.lnum > prev_lnum
			|| cursor_down(1L, FALSE) == FAIL)
		    break;
	    }
	    else
	    {
		if (curwin->w_cursor.lnum < prev_lnum
			|| prev_topline == 1L
			|| cursor_up(1L, FALSE) == FAIL)
		    break;
	    }
	    // Mark w_topline as valid, otherwise the screen jumps back at the
	    // end of the file.
	    check_cursor_moved(curwin);
	    curwin->w_valid |= VALID_TOPLINE;
	}
    }
    if (curwin->w_cursor.lnum != prev_lnum)
	coladvance(curwin->w_curswant);
    redraw_later(UPD_VALID);
}

/*
 * Get the count specified after a 'z' command. Only the 'z<CR>', 'zl', 'zh',
 * 'z<Left>', and 'z<Right>' commands accept a count after 'z'.
 * Returns TRUE to process the 'z' command and FALSE to skip it.
 */
    static int
nv_z_get_count(cmdarg_T *cap, int *nchar_arg)
{
    int		nchar = *nchar_arg;
    long	n;

    // "z123{nchar}": edit the count before obtaining {nchar}
    if (checkclearop(cap->oap))
	return FALSE;
    n = nchar - '0';

    for (;;)
    {
#ifdef USE_ON_FLY_SCROLL
	dont_scroll = TRUE;		// disallow scrolling here
#endif
	++no_mapping;
	++allow_keys;   // no mapping for nchar, but allow key codes
	nchar = plain_vgetc();
	LANGMAP_ADJUST(nchar, TRUE);
	--no_mapping;
	--allow_keys;
	(void)add_to_showcmd(nchar);

	if (nchar == K_DEL || nchar == K_KDEL)
	    n /= 10;
	else if (VIM_ISDIGIT(nchar))
	    n = n * 10 + (nchar - '0');
	else if (nchar == CAR)
	{
#ifdef FEAT_GUI
	    need_mouse_correct = TRUE;
#endif
	    win_setheight((int)n);
	    break;
	}
	else if (nchar == 'l'
		|| nchar == 'h'
		|| nchar == K_LEFT
		|| nchar == K_RIGHT)
	{
	    cap->count1 = n ? n * cap->count1 : cap->count1;
	    *nchar_arg = nchar;
	    return TRUE;
	}
	else
	{
	    clearopbeep(cap->oap);
	    break;
	}
    }
    cap->oap->op_type = OP_NOP;
    return FALSE;
}

#ifdef FEAT_SPELL
/*
 * "zug" and "zuw": undo "zg" and "zw"
 * "zg": add good word to word list
 * "zw": add wrong word to word list
 * "zG": add good word to temp word list
 * "zW": add wrong word to temp word list
 */
    static int
nv_zg_zw(cmdarg_T *cap, int nchar)
{
    char_u	*ptr = NULL;
    int		len;
    int		undo = FALSE;

    if (nchar == 'u')
    {
	++no_mapping;
	++allow_keys;   // no mapping for nchar, but allow key codes
	nchar = plain_vgetc();
	LANGMAP_ADJUST(nchar, TRUE);
	--no_mapping;
	--allow_keys;
	(void)add_to_showcmd(nchar);

	if (vim_strchr((char_u *)"gGwW", nchar) == NULL)
	{
	    clearopbeep(cap->oap);
	    return OK;
	}
	undo = TRUE;
    }

    if (checkclearop(cap->oap))
	return OK;
    if (VIsual_active && get_visual_text(cap, &ptr, &len) == FAIL)
	return FAIL;
    if (ptr == NULL)
    {
	pos_T	pos = curwin->w_cursor;

	// Find bad word under the cursor.  When 'spell' is
	// off this fails and find_ident_under_cursor() is
	// used below.
	emsg_off++;
	len = spell_move_to(curwin, FORWARD, TRUE, TRUE, NULL);
	emsg_off--;
	if (len != 0 && curwin->w_cursor.col <= pos.col)
	    ptr = ml_get_pos(&curwin->w_cursor);
	curwin->w_cursor = pos;
    }

    if (ptr == NULL
		&& (len = find_ident_under_cursor(&ptr, FIND_IDENT)) == 0)
	return FAIL;
    spell_add_word(ptr, len, nchar == 'w' || nchar == 'W'
	    ? SPELL_ADD_BAD : SPELL_ADD_GOOD,
	    (nchar == 'G' || nchar == 'W') ? 0 : (int)cap->count1, undo);

    return OK;
}
#endif

/*
 * Commands that start with "z".
 */
    static void
nv_zet(cmdarg_T *cap)
{
    long	n;
    colnr_T	col;
    int		nchar = cap->nchar;
#ifdef FEAT_FOLDING
    long	old_fdl = curwin->w_p_fdl;
    int		old_fen = curwin->w_p_fen;
#endif
    long	siso = get_sidescrolloff_value();

    if (VIM_ISDIGIT(nchar) && !nv_z_get_count(cap, &nchar))
	    return;

    if (
#ifdef FEAT_FOLDING
	    // "zf" and "zF" are always an operator, "zd", "zo", "zO", "zc"
	    // and "zC" only in Visual mode.  "zj" and "zk" are motion
	    // commands.
	    cap->nchar != 'f' && cap->nchar != 'F'
	    && !(VIsual_active && vim_strchr((char_u *)"dcCoO", cap->nchar))
	    && cap->nchar != 'j' && cap->nchar != 'k'
	    &&
#endif
	    checkclearop(cap->oap))
	return;

    // For "z+", "z<CR>", "zt", "z.", "zz", "z^", "z-", "zb":
    // If line number given, set cursor.
    if ((vim_strchr((char_u *)"+\r\nt.z^-b", nchar) != NULL)
	    && cap->count0
	    && cap->count0 != curwin->w_cursor.lnum)
    {
	setpcmark();
	if (cap->count0 > curbuf->b_ml.ml_line_count)
	    curwin->w_cursor.lnum = curbuf->b_ml.ml_line_count;
	else
	    curwin->w_cursor.lnum = cap->count0;
	check_cursor_col();
    }

    switch (nchar)
    {
		// "z+", "z<CR>" and "zt": put cursor at top of screen
    case '+':
		if (cap->count0 == 0)
		{
		    // No count given: put cursor at the line below screen
		    validate_botline();	// make sure w_botline is valid
		    if (curwin->w_botline > curbuf->b_ml.ml_line_count)
			curwin->w_cursor.lnum = curbuf->b_ml.ml_line_count;
		    else
			curwin->w_cursor.lnum = curwin->w_botline;
		}
		// FALLTHROUGH
    case NL:
    case CAR:
    case K_KENTER:
		beginline(BL_WHITE | BL_FIX);
		// FALLTHROUGH

    case 't':	scroll_cursor_top(0, TRUE);
		redraw_later(UPD_VALID);
		set_fraction(curwin);
		break;

		// "z." and "zz": put cursor in middle of screen
    case '.':	beginline(BL_WHITE | BL_FIX);
		// FALLTHROUGH

    case 'z':	scroll_cursor_halfway(TRUE, FALSE);
		redraw_later(UPD_VALID);
		set_fraction(curwin);
		break;

		// "z^", "z-" and "zb": put cursor at bottom of screen
    case '^':	// Strange Vi behavior: <count>z^ finds line at top of window
		// when <count> is at bottom of window, and puts that one at
		// bottom of window.
		if (cap->count0 != 0)
		{
		    scroll_cursor_bot(0, TRUE);
		    curwin->w_cursor.lnum = curwin->w_topline;
		}
		else if (curwin->w_topline == 1)
		    curwin->w_cursor.lnum = 1;
		else
		    curwin->w_cursor.lnum = curwin->w_topline - 1;
		// FALLTHROUGH
    case '-':
		beginline(BL_WHITE | BL_FIX);
		// FALLTHROUGH

    case 'b':	scroll_cursor_bot(0, TRUE);
		redraw_later(UPD_VALID);
		set_fraction(curwin);
		break;

		// "zH" - scroll screen right half-page
    case 'H':
		cap->count1 *= curwin->w_width / 2;
		// FALLTHROUGH

		// "zh" - scroll screen to the right
    case 'h':
    case K_LEFT:
		if (!curwin->w_p_wrap)
		    (void)set_leftcol((colnr_T)cap->count1 > curwin->w_leftcol
			       ? 0 : curwin->w_leftcol - (colnr_T)cap->count1);
		break;

		// "zL" - scroll window left half-page
    case 'L':	cap->count1 *= curwin->w_width / 2;
		// FALLTHROUGH

		// "zl" - scroll window to the left if not wrapping
    case 'l':
    case K_RIGHT:
		if (!curwin->w_p_wrap)
		    (void)set_leftcol(curwin->w_leftcol + (colnr_T)cap->count1);
		break;

		// "zs" - scroll screen, cursor at the start
    case 's':	if (!curwin->w_p_wrap)
		{
#ifdef FEAT_FOLDING
		    if (hasFolding(curwin->w_cursor.lnum, NULL, NULL))
			col = 0;	// like the cursor is in col 0
		    else
#endif
		    getvcol(curwin, &curwin->w_cursor, &col, NULL, NULL);
		    if ((long)col > siso)
			col -= siso;
		    else
			col = 0;
		    if (curwin->w_leftcol != col)
		    {
			curwin->w_leftcol = col;
			redraw_later(UPD_NOT_VALID);
		    }
		}
		break;

		// "ze" - scroll screen, cursor at the end
    case 'e':	if (!curwin->w_p_wrap)
		{
#ifdef FEAT_FOLDING
		    if (hasFolding(curwin->w_cursor.lnum, NULL, NULL))
			col = 0;	// like the cursor is in col 0
		    else
#endif
		    getvcol(curwin, &curwin->w_cursor, NULL, NULL, &col);
		    n = curwin->w_width - curwin_col_off();
		    if ((long)col + siso < n)
			col = 0;
		    else
			col = col + siso - n + 1;
		    if (curwin->w_leftcol != col)
		    {
			curwin->w_leftcol = col;
			redraw_later(UPD_NOT_VALID);
		    }
		}
		break;

		// "zp", "zP" in block mode put without addind trailing spaces
    case 'P':
    case 'p':  nv_put(cap);
	       break;
		// "zy" Yank without trailing spaces
    case 'y':  nv_operator(cap);
	       break;
#ifdef FEAT_FOLDING
		// "zF": create fold command
		// "zf": create fold operator
    case 'F':
    case 'f':   if (foldManualAllowed(TRUE))
		{
		    cap->nchar = 'f';
		    nv_operator(cap);
		    curwin->w_p_fen = TRUE;

		    // "zF" is like "zfzf"
		    if (nchar == 'F' && cap->oap->op_type == OP_FOLD)
		    {
			nv_operator(cap);
			finish_op = TRUE;
		    }
		}
		else
		    clearopbeep(cap->oap);
		break;

		// "zd": delete fold at cursor
		// "zD": delete fold at cursor recursively
    case 'd':
    case 'D':	if (foldManualAllowed(FALSE))
		{
		    if (VIsual_active)
			nv_operator(cap);
		    else
			deleteFold(curwin->w_cursor.lnum,
				  curwin->w_cursor.lnum, nchar == 'D', FALSE);
		}
		break;

		// "zE": erase all folds
    case 'E':	if (foldmethodIsManual(curwin))
		{
		    clearFolding(curwin);
		    changed_window_setting();
		}
		else if (foldmethodIsMarker(curwin))
		    deleteFold((linenr_T)1, curbuf->b_ml.ml_line_count,
								 TRUE, FALSE);
		else
		    emsg(_(e_cannot_erase_folds_with_current_foldmethod));
		break;

		// "zn": fold none: reset 'foldenable'
    case 'n':	curwin->w_p_fen = FALSE;
		break;

		// "zN": fold Normal: set 'foldenable'
    case 'N':	curwin->w_p_fen = TRUE;
		break;

		// "zi": invert folding: toggle 'foldenable'
    case 'i':	curwin->w_p_fen = !curwin->w_p_fen;
		break;

		// "za": open closed fold or close open fold at cursor
    case 'a':	if (hasFolding(curwin->w_cursor.lnum, NULL, NULL))
		    openFold(curwin->w_cursor.lnum, cap->count1);
		else
		{
		    closeFold(curwin->w_cursor.lnum, cap->count1);
		    curwin->w_p_fen = TRUE;
		}
		break;

		// "zA": open fold at cursor recursively
    case 'A':	if (hasFolding(curwin->w_cursor.lnum, NULL, NULL))
		    openFoldRecurse(curwin->w_cursor.lnum);
		else
		{
		    closeFoldRecurse(curwin->w_cursor.lnum);
		    curwin->w_p_fen = TRUE;
		}
		break;

		// "zo": open fold at cursor or Visual area
    case 'o':	if (VIsual_active)
		    nv_operator(cap);
		else
		    openFold(curwin->w_cursor.lnum, cap->count1);
		break;

		// "zO": open fold recursively
    case 'O':	if (VIsual_active)
		    nv_operator(cap);
		else
		    openFoldRecurse(curwin->w_cursor.lnum);
		break;

		// "zc": close fold at cursor or Visual area
    case 'c':	if (VIsual_active)
		    nv_operator(cap);
		else
		    closeFold(curwin->w_cursor.lnum, cap->count1);
		curwin->w_p_fen = TRUE;
		break;

		// "zC": close fold recursively
    case 'C':	if (VIsual_active)
		    nv_operator(cap);
		else
		    closeFoldRecurse(curwin->w_cursor.lnum);
		curwin->w_p_fen = TRUE;
		break;

		// "zv": open folds at the cursor
    case 'v':	foldOpenCursor();
		break;

		// "zx": re-apply 'foldlevel' and open folds at the cursor
    case 'x':	curwin->w_p_fen = TRUE;
		curwin->w_foldinvalid = TRUE;	// recompute folds
		newFoldLevel();			// update right now
		foldOpenCursor();
		break;

		// "zX": undo manual opens/closes, re-apply 'foldlevel'
    case 'X':	curwin->w_p_fen = TRUE;
		curwin->w_foldinvalid = TRUE;	// recompute folds
		old_fdl = -1;			// force an update
		break;

		// "zm": fold more
    case 'm':	if (curwin->w_p_fdl > 0)
		{
		    curwin->w_p_fdl -= cap->count1;
		    if (curwin->w_p_fdl < 0)
			curwin->w_p_fdl = 0;
		}
		old_fdl = -1;		// force an update
		curwin->w_p_fen = TRUE;
		break;

		// "zM": close all folds
    case 'M':	curwin->w_p_fdl = 0;
		old_fdl = -1;		// force an update
		curwin->w_p_fen = TRUE;
		break;

		// "zr": reduce folding
    case 'r':	curwin->w_p_fdl += cap->count1;
		{
		    int d = getDeepestNesting();

		    if (curwin->w_p_fdl >= d)
			curwin->w_p_fdl = d;
		}
		break;

		// "zR": open all folds
    case 'R':	curwin->w_p_fdl = getDeepestNesting();
		old_fdl = -1;		// force an update
		break;

    case 'j':	// "zj" move to next fold downwards
    case 'k':	// "zk" move to next fold upwards
		if (foldMoveTo(TRUE, nchar == 'j' ? FORWARD : BACKWARD,
							  cap->count1) == FAIL)
		    clearopbeep(cap->oap);
		break;

#endif // FEAT_FOLDING

#ifdef FEAT_SPELL
    case 'u':	// "zug" and "zuw": undo "zg" and "zw"
    case 'g':	// "zg": add good word to word list
    case 'w':	// "zw": add wrong word to word list
    case 'G':	// "zG": add good word to temp word list
    case 'W':	// "zW": add wrong word to temp word list
		if (nv_zg_zw(cap, nchar) == FAIL)
		    return;
		break;

    case '=':	// "z=": suggestions for a badly spelled word
		if (!checkclearop(cap->oap))
		    spell_suggest((int)cap->count0);
		break;
#endif

    default:	clearopbeep(cap->oap);
    }

#ifdef FEAT_FOLDING
    // Redraw when 'foldenable' changed
    if (old_fen != curwin->w_p_fen)
    {
# ifdef FEAT_DIFF
	win_T	    *wp;

	if (foldmethodIsDiff(curwin) && curwin->w_p_scb)
	{
	    // Adjust 'foldenable' in diff-synced windows.
	    FOR_ALL_WINDOWS(wp)
	    {
		if (wp != curwin && foldmethodIsDiff(wp) && wp->w_p_scb)
		{
		    wp->w_p_fen = curwin->w_p_fen;
		    changed_window_setting_win(wp);
		}
	    }
	}
# endif
	changed_window_setting();
    }

    // Redraw when 'foldlevel' changed.
    if (old_fdl != curwin->w_p_fdl)
	newFoldLevel();
#endif
}

#ifdef FEAT_GUI
/*
 * Vertical scrollbar movement.
 */
    static void
nv_ver_scrollbar(cmdarg_T *cap)
{
    if (cap->oap->op_type != OP_NOP)
	clearopbeep(cap->oap);

    // Even if an operator was pending, we still want to scroll
    gui_do_scroll();
}

/*
 * Horizontal scrollbar movement.
 */
    static void
nv_hor_scrollbar(cmdarg_T *cap)
{
    if (cap->oap->op_type != OP_NOP)
	clearopbeep(cap->oap);

    // Even if an operator was pending, we still want to scroll
    do_mousescroll_horiz(scrollbar_value);
}
#endif

#if defined(FEAT_GUI_TABLINE) || defined(PROTO)
/*
 * Click in GUI tab.
 */
    static void
nv_tabline(cmdarg_T *cap)
{
    if (cap->oap->op_type != OP_NOP)
	clearopbeep(cap->oap);

    // Even if an operator was pending, we still want to jump tabs.
    goto_tabpage(current_tab);
}

/*
 * Selected item in tab line menu.
 */
    static void
nv_tabmenu(cmdarg_T *cap)
{
    if (cap->oap->op_type != OP_NOP)
	clearopbeep(cap->oap);

    // Even if an operator was pending, we still want to jump tabs.
    handle_tabmenu();
}

/*
 * Handle selecting an item of the GUI tab line menu.
 * Used in Normal and Insert mode.
 */
    void
handle_tabmenu(void)
{
    switch (current_tabmenu)
    {
	case TABLINE_MENU_CLOSE:
	    if (current_tab == 0)
		do_cmdline_cmd((char_u *)"tabclose");
	    else
	    {
		vim_snprintf((char *)IObuff, IOSIZE, "tabclose %d",
								 current_tab);
		do_cmdline_cmd(IObuff);
	    }
	    break;

	case TABLINE_MENU_NEW:
	    if (current_tab == 0)
		do_cmdline_cmd((char_u *)"$tabnew");
	    else
	    {
		vim_snprintf((char *)IObuff, IOSIZE, "%dtabnew",
							     current_tab - 1);
		do_cmdline_cmd(IObuff);
	    }
	    break;

	case TABLINE_MENU_OPEN:
	    if (current_tab == 0)
		do_cmdline_cmd((char_u *)"browse $tabnew");
	    else
	    {
		vim_snprintf((char *)IObuff, IOSIZE, "browse %dtabnew",
							     current_tab - 1);
		do_cmdline_cmd(IObuff);
	    }
	    break;
    }
}
#endif

/*
 * "Q" command.
 */
    static void
nv_exmode(cmdarg_T *cap)
{
    // Ignore 'Q' in Visual mode, just give a beep.
    if (VIsual_active)
	vim_beep(BO_EX);
    else if (!checkclearop(cap->oap))
	do_exmode(FALSE);
}

/*
 * Handle a ":" command.
 */
    static void
nv_colon(cmdarg_T *cap)
{
    int	old_p_im;
    int	cmd_result;
    int	is_cmdkey = cap->cmdchar == K_COMMAND
					   || cap->cmdchar == K_SCRIPT_COMMAND;
    int	flags;

    if (VIsual_active && !is_cmdkey)
    {
	nv_operator(cap);
	return;
    }

    if (cap->oap->op_type != OP_NOP)
    {
	// Using ":" as a movement is characterwise exclusive.
	cap->oap->motion_type = MCHAR;
	cap->oap->inclusive = FALSE;
    }
    else if (cap->count0 && !is_cmdkey)
    {
	// translate "count:" into ":.,.+(count - 1)"
	stuffcharReadbuff('.');
	if (cap->count0 > 1)
	{
	    stuffReadbuff((char_u *)",.+");
	    stuffnumReadbuff((long)cap->count0 - 1L);
	}
    }

    // When typing, don't type below an old message
    if (KeyTyped)
	compute_cmdrow();

    old_p_im = p_im;

    // get a command line and execute it
    flags = cap->oap->op_type != OP_NOP ? DOCMD_KEEPLINE : 0;
    if (is_cmdkey)
	cmd_result = do_cmdkey_command(cap->cmdchar, flags);
    else
	cmd_result = do_cmdline(NULL, getexline, NULL, flags);

    // If 'insertmode' changed, enter or exit Insert mode
    if (p_im != old_p_im)
    {
	if (p_im)
	    restart_edit = 'i';
	else
	    restart_edit = 0;
    }

    if (cmd_result == FAIL)
	// The Ex command failed, do not execute the operator.
	clearop(cap->oap);
    else if (cap->oap->op_type != OP_NOP
	    && (cap->oap->start.lnum > curbuf->b_ml.ml_line_count
		|| cap->oap->start.col >
				  (colnr_T)STRLEN(ml_get(cap->oap->start.lnum))
		|| did_emsg
	       ))
	// The start of the operator has become invalid by the Ex command.
	clearopbeep(cap->oap);
}

/*
 * Handle CTRL-G command.
 */
    static void
nv_ctrlg(cmdarg_T *cap)
{
    if (VIsual_active)	// toggle Selection/Visual mode
    {
	VIsual_select = !VIsual_select;
	may_trigger_modechanged();
	showmode();
    }
    else if (!checkclearop(cap->oap))
	// print full name if count given or :cd used
	fileinfo((int)cap->count0, FALSE, TRUE);
}

/*
 * Handle CTRL-H <Backspace> command.
 */
    static void
nv_ctrlh(cmdarg_T *cap)
{
    if (VIsual_active && VIsual_select)
    {
	cap->cmdchar = 'x';	// BS key behaves like 'x' in Select mode
	v_visop(cap);
    }
    else
	nv_left(cap);
}

/*
 * CTRL-L: clear screen and redraw.
 */
    static void
nv_clear(cmdarg_T *cap)
{
    if (checkclearop(cap->oap))
	return;

#ifdef FEAT_SYN_HL
    // Clear all syntax states to force resyncing.
    syn_stack_free_all(curwin->w_s);
# ifdef FEAT_RELTIME
    {
	win_T *wp;

	FOR_ALL_WINDOWS(wp)
	    wp->w_s->b_syn_slow = FALSE;
    }
# endif
#endif
    redraw_later(UPD_CLEAR);
#if defined(MSWIN) && (!defined(FEAT_GUI_MSWIN) || defined(VIMDLL))
# ifdef VIMDLL
    if (!gui.in_use)
# endif
	resize_console_buf();
#endif
}

/*
 * CTRL-O: In Select mode: switch to Visual mode for one command.
 * Otherwise: Go to older pcmark.
 */
    static void
nv_ctrlo(cmdarg_T *cap)
{
    if (VIsual_active && VIsual_select)
    {
	VIsual_select = FALSE;
	may_trigger_modechanged();
	showmode();
	restart_VIsual_select = 2;	// restart Select mode later
    }
    else
    {
	cap->count1 = -cap->count1;
	nv_pcmark(cap);
    }
}

/*
 * CTRL-^ command, short for ":e #".  Works even when the alternate buffer is
 * not named.
 */
    static void
nv_hat(cmdarg_T *cap)
{
    if (!checkclearopq(cap->oap))
	(void)buflist_getfile((int)cap->count0, (linenr_T)0,
						GETF_SETMARK|GETF_ALT, FALSE);
}

/*
 * "Z" commands.
 */
    static void
nv_Zet(cmdarg_T *cap)
{
    if (checkclearopq(cap->oap))
	return;

    switch (cap->nchar)
    {
	// "ZZ": equivalent to ":x".
	case 'Z':	do_cmdline_cmd((char_u *)"x");
			break;

			// "ZQ": equivalent to ":q!" (Elvis compatible).
	case 'Q':	do_cmdline_cmd((char_u *)"q!");
			break;

	default:	clearopbeep(cap->oap);
    }
}

/*
 * Call nv_ident() as if "c1" was used, with "c2" as next character.
 */
    void
do_nv_ident(int c1, int c2)
{
    oparg_T	oa;
    cmdarg_T	ca;

    clear_oparg(&oa);
    CLEAR_FIELD(ca);
    ca.oap = &oa;
    ca.cmdchar = c1;
    ca.nchar = c2;
    nv_ident(&ca);
}

/*
 * 'K' normal-mode command. Get the command to lookup the keyword under the
 * cursor.
 */
    static int
nv_K_getcmd(
	cmdarg_T	*cap,
	char_u		*kp,
	int		kp_help,
	int		kp_ex,
	char_u		**ptr_arg,
	int		n,
	char_u		*buf,
	unsigned	buflen)
{
    char_u	*ptr = *ptr_arg;
    int		isman;
    int		isman_s;

    if (kp_help)
    {
	// in the help buffer
	STRCPY(buf, "he! ");
	return n;
    }

    if (kp_ex)
    {
	// 'keywordprog' is an ex command
	if (cap->count0 != 0)
	    vim_snprintf((char *)buf, buflen, "%s %ld", kp, cap->count0);
	else
	    STRCPY(buf, kp);
	STRCAT(buf, " ");
	return n;
    }

    // An external command will probably use an argument starting
    // with "-" as an option.  To avoid trouble we skip the "-".
    while (*ptr == '-' && n > 0)
    {
	++ptr;
	--n;
    }
    if (n == 0)
    {
	// found dashes only
	emsg(_(e_no_identifier_under_cursor));
	vim_free(buf);
	*ptr_arg = ptr;
	return 0;
    }

    // When a count is given, turn it into a range.  Is this
    // really what we want?
    isman = (STRCMP(kp, "man") == 0);
    isman_s = (STRCMP(kp, "man -s") == 0);
    if (cap->count0 != 0 && !(isman || isman_s))
	sprintf((char *)buf, ".,.+%ld", cap->count0 - 1);

    STRCAT(buf, "! ");
    if (cap->count0 == 0 && isman_s)
	STRCAT(buf, "man");
    else
	STRCAT(buf, kp);
    STRCAT(buf, " ");
    if (cap->count0 != 0 && (isman || isman_s))
    {
	sprintf((char *)buf + STRLEN(buf), "%ld", cap->count0);
	STRCAT(buf, " ");
    }

    *ptr_arg = ptr;
    return n;
}

/*
 * Handle the commands that use the word under the cursor.
 * [g] CTRL-]	:ta to current identifier
 * [g] 'K'	run program for current identifier
 * [g] '*'	/ to current identifier or string
 * [g] '#'	? to current identifier or string
 *  g  ']'	:tselect for current identifier
 */
    static void
nv_ident(cmdarg_T *cap)
{
    char_u	*ptr = NULL;
    char_u	*buf;
    unsigned	buflen;
    char_u	*newbuf;
    char_u	*p;
    char_u	*kp;		// value of 'keywordprg'
    int		kp_help;	// 'keywordprg' is ":he"
    int		kp_ex;		// 'keywordprg' starts with ":"
    int		n = 0;		// init for GCC
    int		cmdchar;
    int		g_cmd;		// "g" command
    int		tag_cmd = FALSE;
    char_u	*aux_ptr;

    if (cap->cmdchar == 'g')	// "g*", "g#", "g]" and "gCTRL-]"
    {
	cmdchar = cap->nchar;
	g_cmd = TRUE;
    }
    else
    {
	cmdchar = cap->cmdchar;
	g_cmd = FALSE;
    }

    if (cmdchar == POUND)	// the pound sign, '#' for English keyboards
	cmdchar = '#';

    // The "]", "CTRL-]" and "K" commands accept an argument in Visual mode.
    if (cmdchar == ']' || cmdchar == Ctrl_RSB || cmdchar == 'K')
    {
	if (VIsual_active && get_visual_text(cap, &ptr, &n) == FAIL)
	    return;
	if (checkclearopq(cap->oap))
	    return;
    }

    if (ptr == NULL && (n = find_ident_under_cursor(&ptr,
		    (cmdchar == '*' || cmdchar == '#')
				 ? FIND_IDENT|FIND_STRING : FIND_IDENT)) == 0)
    {
	clearop(cap->oap);
	return;
    }

    // Allocate buffer to put the command in.  Inserting backslashes can
    // double the length of the word.  p_kp / curbuf->b_p_kp could be added
    // and some numbers.
    kp = (*curbuf->b_p_kp == NUL ? p_kp : curbuf->b_p_kp);
    kp_help = (*kp == NUL || STRCMP(kp, ":he") == 0
						 || STRCMP(kp, ":help") == 0);
    if (kp_help && *skipwhite(ptr) == NUL)
    {
	emsg(_(e_no_identifier_under_cursor));	 // found white space only
	return;
    }
    kp_ex = (*kp == ':');
    buflen = (unsigned)(n * 2 + 30 + STRLEN(kp));
    buf = alloc(buflen);
    if (buf == NULL)
	return;
    buf[0] = NUL;

    switch (cmdchar)
    {
	case '*':
	case '#':
	    // Put cursor at start of word, makes search skip the word
	    // under the cursor.
	    // Call setpcmark() first, so "*``" puts the cursor back where
	    // it was.
	    setpcmark();
	    curwin->w_cursor.col = (colnr_T) (ptr - ml_get_curline());

	    if (!g_cmd && vim_iswordp(ptr))
		STRCPY(buf, "\\<");
	    no_smartcase = TRUE;	// don't use 'smartcase' now
	    break;

	case 'K':
	    n = nv_K_getcmd(cap, kp, kp_help, kp_ex, &ptr, n, buf, buflen);
	    if (n == 0)
		return;
	    break;

	case ']':
	    tag_cmd = TRUE;
#ifdef FEAT_CSCOPE
	    if (p_cst)
		STRCPY(buf, "cstag ");
	    else
#endif
		STRCPY(buf, "ts ");
	    break;

	default:
	    tag_cmd = TRUE;
	    if (curbuf->b_help)
		STRCPY(buf, "he! ");
	    else
	    {
		if (g_cmd)
		    STRCPY(buf, "tj ");
		else if (cap->count0 == 0)
		    STRCPY(buf, "ta ");
		else
		    sprintf((char *)buf, ":%ldta ", cap->count0);
	    }
    }

    // Now grab the chars in the identifier
    if (cmdchar == 'K' && !kp_help)
    {
	ptr = vim_strnsave(ptr, n);
	if (kp_ex)
	    // Escape the argument properly for an Ex command
	    p = vim_strsave_fnameescape(ptr, VSE_NONE);
	else
	    // Escape the argument properly for a shell command
	    p = vim_strsave_shellescape(ptr, TRUE, TRUE);
	vim_free(ptr);
	if (p == NULL)
	{
	    vim_free(buf);
	    return;
	}
	newbuf = vim_realloc(buf, STRLEN(buf) + STRLEN(p) + 1);
	if (newbuf == NULL)
	{
	    vim_free(buf);
	    vim_free(p);
	    return;
	}
	buf = newbuf;
	STRCAT(buf, p);
	vim_free(p);
    }
    else
    {
	if (cmdchar == '*')
	    aux_ptr = (char_u *)(magic_isset() ? "/.*~[^$\\" : "/^$\\");
	else if (cmdchar == '#')
	    aux_ptr = (char_u *)(magic_isset() ? "/?.*~[^$\\" : "/?^$\\");
	else if (tag_cmd)
	{
	    if (curbuf->b_help)
		// ":help" handles unescaped argument
		aux_ptr = (char_u *)"";
	    else
		aux_ptr = (char_u *)"\\|\"\n[";
	}
	else
	    aux_ptr = (char_u *)"\\|\"\n*?[";

	p = buf + STRLEN(buf);
	while (n-- > 0)
	{
	    // put a backslash before \ and some others
	    if (vim_strchr(aux_ptr, *ptr) != NULL)
		*p++ = '\\';
	    // When current byte is a part of multibyte character, copy all
	    // bytes of that character.
	    if (has_mbyte)
	    {
		int i;
		int len = (*mb_ptr2len)(ptr) - 1;

		for (i = 0; i < len && n >= 1; ++i, --n)
		    *p++ = *ptr++;
	    }
	    *p++ = *ptr++;
	}
	*p = NUL;
    }

    // Execute the command.
    if (cmdchar == '*' || cmdchar == '#')
    {
	if (!g_cmd && (has_mbyte
		    ? vim_iswordp(mb_prevptr(ml_get_curline(), ptr))
		    : vim_iswordc(ptr[-1])))
	    STRCAT(buf, "\\>");

	// put pattern in search history
	init_history();
	add_to_history(HIST_SEARCH, buf, TRUE, NUL);

	(void)normal_search(cap, cmdchar == '*' ? '/' : '?', buf, 0, NULL);
    }
    else
    {
	g_tag_at_cursor = TRUE;
	do_cmdline_cmd(buf);
	g_tag_at_cursor = FALSE;
    }

    vim_free(buf);
}

/*
 * Get visually selected text, within one line only.
 * Returns FAIL if more than one line selected.
 */
    int
get_visual_text(
    cmdarg_T	*cap,
    char_u	**pp,	    // return: start of selected text
    int		*lenp)	    // return: length of selected text
{
    if (VIsual_mode != 'V')
	unadjust_for_sel();
    if (VIsual.lnum != curwin->w_cursor.lnum)
    {
	if (cap != NULL)
	    clearopbeep(cap->oap);
	return FAIL;
    }
    if (VIsual_mode == 'V')
    {
	*pp = ml_get_curline();
	*lenp = (int)STRLEN(*pp);
    }
    else
    {
	if (LT_POS(curwin->w_cursor, VIsual))
	{
	    *pp = ml_get_pos(&curwin->w_cursor);
	    *lenp = VIsual.col - curwin->w_cursor.col + 1;
	}
	else
	{
	    *pp = ml_get_pos(&VIsual);
	    *lenp = curwin->w_cursor.col - VIsual.col + 1;
	}
	if (**pp == NUL)
	    *lenp = 0;
	if (*lenp > 0)
	{
	    if (has_mbyte)
		// Correct the length to include all bytes of the last
		// character.
		*lenp += (*mb_ptr2len)(*pp + (*lenp - 1)) - 1;
	    else if ((*pp)[*lenp - 1] == NUL)
		// Do not include a trailing NUL.
		*lenp -= 1;
	}
    }
    reset_VIsual_and_resel();
    return OK;
}

/*
 * CTRL-T: backwards in tag stack
 */
    static void
nv_tagpop(cmdarg_T *cap)
{
    if (!checkclearopq(cap->oap))
	do_tag((char_u *)"", DT_POP, (int)cap->count1, FALSE, TRUE);
}

/*
 * Handle scrolling command 'H', 'L' and 'M'.
 */
    static void
nv_scroll(cmdarg_T *cap)
{
    int		used = 0;
    long	n;
#ifdef FEAT_FOLDING
    linenr_T	lnum;
#endif
    int		half;

    cap->oap->motion_type = MLINE;
    setpcmark();

    if (cap->cmdchar == 'L')
    {
	validate_botline();	    // make sure curwin->w_botline is valid
	curwin->w_cursor.lnum = curwin->w_botline - 1;
	if (cap->count1 - 1 >= curwin->w_cursor.lnum)
	    curwin->w_cursor.lnum = 1;
	else
	{
#ifdef FEAT_FOLDING
	    if (hasAnyFolding(curwin))
	    {
		// Count a fold for one screen line.
		for (n = cap->count1 - 1; n > 0
			    && curwin->w_cursor.lnum > curwin->w_topline; --n)
		{
		    (void)hasFolding(curwin->w_cursor.lnum,
						&curwin->w_cursor.lnum, NULL);
		    if (curwin->w_cursor.lnum > curwin->w_topline)
			--curwin->w_cursor.lnum;
		}
	    }
	    else
#endif
		curwin->w_cursor.lnum -= cap->count1 - 1;
	}
    }
    else
    {
	if (cap->cmdchar == 'M')
	{
#ifdef FEAT_DIFF
	    // Don't count filler lines above the window.
	    used -= diff_check_fill(curwin, curwin->w_topline)
							  - curwin->w_topfill;
#endif
	    validate_botline();	    // make sure w_empty_rows is valid
	    half = (curwin->w_height - curwin->w_empty_rows + 1) / 2;
	    for (n = 0; curwin->w_topline + n < curbuf->b_ml.ml_line_count; ++n)
	    {
#ifdef FEAT_DIFF
		// Count half he number of filler lines to be "below this
		// line" and half to be "above the next line".
		if (n > 0 && used + diff_check_fill(curwin, curwin->w_topline
							     + n) / 2 >= half)
		{
		    --n;
		    break;
		}
#endif
		used += plines(curwin->w_topline + n);
		if (used >= half)
		    break;
#ifdef FEAT_FOLDING
		if (hasFolding(curwin->w_topline + n, NULL, &lnum))
		    n = lnum - curwin->w_topline;
#endif
	    }
	    if (n > 0 && used > curwin->w_height)
		--n;
	}
	else // (cap->cmdchar == 'H')
	{
	    n = cap->count1 - 1;
#ifdef FEAT_FOLDING
	    if (hasAnyFolding(curwin))
	    {
		// Count a fold for one screen line.
		lnum = curwin->w_topline;
		while (n-- > 0 && lnum < curwin->w_botline - 1)
		{
		    (void)hasFolding(lnum, NULL, &lnum);
		    ++lnum;
		}
		n = lnum - curwin->w_topline;
	    }
#endif
	}
	curwin->w_cursor.lnum = curwin->w_topline + n;
	if (curwin->w_cursor.lnum > curbuf->b_ml.ml_line_count)
	    curwin->w_cursor.lnum = curbuf->b_ml.ml_line_count;
    }

    // Correct for 'so', except when an operator is pending.
    if (cap->oap->op_type == OP_NOP)
	cursor_correct();
    beginline(BL_SOL | BL_FIX);
}

/*
 * Cursor right commands.
 */
    static void
nv_right(cmdarg_T *cap)
{
    long	n;
    int		past_line;

    if (mod_mask & (MOD_MASK_SHIFT | MOD_MASK_CTRL))
    {
	// <C-Right> and <S-Right> move a word or WORD right
	if (mod_mask & MOD_MASK_CTRL)
	    cap->arg = TRUE;
	nv_wordcmd(cap);
	return;
    }

    cap->oap->motion_type = MCHAR;
    cap->oap->inclusive = FALSE;
    past_line = (VIsual_active && *p_sel != 'o');

    // In virtual edit mode, there's no such thing as "past_line", as lines
    // are (theoretically) infinitely long.
    if (virtual_active())
	past_line = 0;

    for (n = cap->count1; n > 0; --n)
    {
	if ((!past_line && oneright() == FAIL)
		|| (past_line && *ml_get_cursor() == NUL)
		)
	{
	    //	  <Space> wraps to next line if 'whichwrap' has 's'.
	    //	      'l' wraps to next line if 'whichwrap' has 'l'.
	    // CURS_RIGHT wraps to next line if 'whichwrap' has '>'.
	    if (       ((cap->cmdchar == ' '
			    && vim_strchr(p_ww, 's') != NULL)
			|| (cap->cmdchar == 'l'
			    && vim_strchr(p_ww, 'l') != NULL)
			|| (cap->cmdchar == K_RIGHT
			    && vim_strchr(p_ww, '>') != NULL))
		    && curwin->w_cursor.lnum < curbuf->b_ml.ml_line_count)
	    {
		// When deleting we also count the NL as a character.
		// Set cap->oap->inclusive when last char in the line is
		// included, move to next line after that
		if (	   cap->oap->op_type != OP_NOP
			&& !cap->oap->inclusive
			&& !LINEEMPTY(curwin->w_cursor.lnum))
		    cap->oap->inclusive = TRUE;
		else
		{
		    ++curwin->w_cursor.lnum;
		    curwin->w_cursor.col = 0;
		    curwin->w_cursor.coladd = 0;
		    curwin->w_set_curswant = TRUE;
		    cap->oap->inclusive = FALSE;
		}
		continue;
	    }
	    if (cap->oap->op_type == OP_NOP)
	    {
		// Only beep and flush if not moved at all
		if (n == cap->count1)
		    beep_flush();
	    }
	    else
	    {
		if (!LINEEMPTY(curwin->w_cursor.lnum))
		    cap->oap->inclusive = TRUE;
	    }
	    break;
	}
	else if (past_line)
	{
	    curwin->w_set_curswant = TRUE;
	    if (virtual_active())
		oneright();
	    else
	    {
		if (has_mbyte)
		    curwin->w_cursor.col += (*mb_ptr2len)(ml_get_cursor());
		else
		    ++curwin->w_cursor.col;
	    }
	}
    }
#ifdef FEAT_FOLDING
    if (n != cap->count1 && (fdo_flags & FDO_HOR) && KeyTyped
					       && cap->oap->op_type == OP_NOP)
	foldOpenCursor();
#endif
}

/*
 * Cursor left commands.
 *
 * Returns TRUE when operator end should not be adjusted.
 */
    static void
nv_left(cmdarg_T *cap)
{
    long	n;

    if (mod_mask & (MOD_MASK_SHIFT | MOD_MASK_CTRL))
    {
	// <C-Left> and <S-Left> move a word or WORD left
	if (mod_mask & MOD_MASK_CTRL)
	    cap->arg = 1;
	nv_bck_word(cap);
	return;
    }

    cap->oap->motion_type = MCHAR;
    cap->oap->inclusive = FALSE;
    for (n = cap->count1; n > 0; --n)
    {
	if (oneleft() == FAIL)
	{
	    // <BS> and <Del> wrap to previous line if 'whichwrap' has 'b'.
	    //		 'h' wraps to previous line if 'whichwrap' has 'h'.
	    //	   CURS_LEFT wraps to previous line if 'whichwrap' has '<'.
	    if (       (((cap->cmdchar == K_BS
				|| cap->cmdchar == Ctrl_H)
			    && vim_strchr(p_ww, 'b') != NULL)
			|| (cap->cmdchar == 'h'
			    && vim_strchr(p_ww, 'h') != NULL)
			|| (cap->cmdchar == K_LEFT
			    && vim_strchr(p_ww, '<') != NULL))
		    && curwin->w_cursor.lnum > 1)
	    {
		--(curwin->w_cursor.lnum);
		coladvance((colnr_T)MAXCOL);
		curwin->w_set_curswant = TRUE;

		// When the NL before the first char has to be deleted we
		// put the cursor on the NUL after the previous line.
		// This is a very special case, be careful!
		// Don't adjust op_end now, otherwise it won't work.
		if (	   (cap->oap->op_type == OP_DELETE
			    || cap->oap->op_type == OP_CHANGE)
			&& !LINEEMPTY(curwin->w_cursor.lnum))
		{
		    char_u *cp = ml_get_cursor();

		    if (*cp != NUL)
		    {
			if (has_mbyte)
			    curwin->w_cursor.col += (*mb_ptr2len)(cp);
			else
			    ++curwin->w_cursor.col;
		    }
		    cap->retval |= CA_NO_ADJ_OP_END;
		}
		continue;
	    }
	    // Only beep and flush if not moved at all
	    else if (cap->oap->op_type == OP_NOP && n == cap->count1)
		beep_flush();
	    break;
	}
    }
#ifdef FEAT_FOLDING
    if (n != cap->count1 && (fdo_flags & FDO_HOR) && KeyTyped
					       && cap->oap->op_type == OP_NOP)
	foldOpenCursor();
#endif
}

/*
 * Cursor up commands.
 * cap->arg is TRUE for "-": Move cursor to first non-blank.
 */
    static void
nv_up(cmdarg_T *cap)
{
    if (mod_mask & MOD_MASK_SHIFT)
    {
	// <S-Up> is page up
	cap->arg = BACKWARD;
	nv_page(cap);
	return;
    }

    cap->oap->motion_type = MLINE;
    if (cursor_up(cap->count1, cap->oap->op_type == OP_NOP) == FAIL)
	clearopbeep(cap->oap);
    else if (cap->arg)
	beginline(BL_WHITE | BL_FIX);
}

/*
 * Cursor down commands.
 * cap->arg is TRUE for CR and "+": Move cursor to first non-blank.
 */
    static void
nv_down(cmdarg_T *cap)
{
    if (mod_mask & MOD_MASK_SHIFT)
    {
	// <S-Down> is page down
	cap->arg = FORWARD;
	nv_page(cap);
    }
#if defined(FEAT_QUICKFIX)
    // Quickfix window only: view the result under the cursor.
    else if (bt_quickfix(curbuf) && cap->cmdchar == CAR)
	qf_view_result(FALSE);
#endif
    else
    {
	// In the cmdline window a <CR> executes the command.
	if (cmdwin_type != 0 && cap->cmdchar == CAR)
	    cmdwin_result = CAR;
	else
#ifdef FEAT_JOB_CHANNEL
	// In a prompt buffer a <CR> in the last line invokes the callback.
	if (bt_prompt(curbuf) && cap->cmdchar == CAR
		       && curwin->w_cursor.lnum == curbuf->b_ml.ml_line_count)
	{
	    invoke_prompt_callback();
	    if (restart_edit == 0)
		restart_edit = 'a';
	}
	else
#endif
	{
	    cap->oap->motion_type = MLINE;
	    if (cursor_down(cap->count1, cap->oap->op_type == OP_NOP) == FAIL)
		clearopbeep(cap->oap);
	    else if (cap->arg)
		beginline(BL_WHITE | BL_FIX);
	}
    }
}

/*
 * Grab the file name under the cursor and edit it.
 */
    static void
nv_gotofile(cmdarg_T *cap)
{
    char_u	*ptr;
    linenr_T	lnum = -1;

    if (check_text_or_curbuf_locked(cap->oap))
	return;

#ifdef FEAT_PROP_POPUP
    if (ERROR_IF_TERM_POPUP_WINDOW)
	return;
#endif

    ptr = grab_file_name(cap->count1, &lnum);

    if (ptr != NULL)
    {
	// do autowrite if necessary
	if (curbufIsChanged() && curbuf->b_nwindows <= 1 && !buf_hide(curbuf))
	    (void)autowrite(curbuf, FALSE);
	setpcmark();
	if (do_ecmd(0, ptr, NULL, NULL, ECMD_LAST,
				buf_hide(curbuf) ? ECMD_HIDE : 0, curwin) == OK
		&& cap->nchar == 'F' && lnum >= 0)
	{
	    curwin->w_cursor.lnum = lnum;
	    check_cursor_lnum();
	    beginline(BL_SOL | BL_FIX);
	}
	vim_free(ptr);
    }
    else
	clearop(cap->oap);
}

/*
 * <End> command: to end of current line or last line.
 */
    static void
nv_end(cmdarg_T *cap)
{
    if (cap->arg || (mod_mask & MOD_MASK_CTRL))	// CTRL-END = goto last line
    {
	cap->arg = TRUE;
	nv_goto(cap);
	cap->count1 = 1;		// to end of current line
    }
    nv_dollar(cap);
}

/*
 * Handle the "$" command.
 */
    static void
nv_dollar(cmdarg_T *cap)
{
    cap->oap->motion_type = MCHAR;
    cap->oap->inclusive = TRUE;
    // In virtual mode when off the edge of a line and an operator
    // is pending (whew!) keep the cursor where it is.
    // Otherwise, send it to the end of the line.
    if (!virtual_active() || gchar_cursor() != NUL
					       || cap->oap->op_type == OP_NOP)
	curwin->w_curswant = MAXCOL;	// so we stay at the end
    if (cursor_down((long)(cap->count1 - 1),
					 cap->oap->op_type == OP_NOP) == FAIL)
	clearopbeep(cap->oap);
#ifdef FEAT_FOLDING
    else if ((fdo_flags & FDO_HOR) && KeyTyped && cap->oap->op_type == OP_NOP)
	foldOpenCursor();
#endif
}

/*
 * Implementation of '?' and '/' commands.
 * If cap->arg is TRUE don't set PC mark.
 */
    static void
nv_search(cmdarg_T *cap)
{
    oparg_T	*oap = cap->oap;
    pos_T	save_cursor = curwin->w_cursor;

    if (cap->cmdchar == '?' && cap->oap->op_type == OP_ROT13)
    {
	// Translate "g??" to "g?g?"
	cap->cmdchar = 'g';
	cap->nchar = '?';
	nv_operator(cap);
	return;
    }

    // When using 'incsearch' the cursor may be moved to set a different search
    // start position.
    cap->searchbuf = getcmdline(cap->cmdchar, cap->count1, 0, 0);

    if (cap->searchbuf == NULL)
    {
	clearop(oap);
	return;
    }

    (void)normal_search(cap, cap->cmdchar, cap->searchbuf,
			(cap->arg || !EQUAL_POS(save_cursor, curwin->w_cursor))
						      ? 0 : SEARCH_MARK, NULL);
}


/*
 * Handle "N" and "n" commands.
 * cap->arg is SEARCH_REV for "N", 0 for "n".
 */
    static void
nv_next(cmdarg_T *cap)
{
    pos_T   old = curwin->w_cursor;
    int	    wrapped = FALSE;
    int	    i = normal_search(cap, 0, NULL, SEARCH_MARK | cap->arg, &wrapped);

    if (i == 1 && !wrapped && EQUAL_POS(old, curwin->w_cursor))
    {
	// Avoid getting stuck on the current cursor position, which can
	// happen when an offset is given and the cursor is on the last char
	// in the buffer: Repeat with count + 1.
	cap->count1 += 1;
	(void)normal_search(cap, 0, NULL, SEARCH_MARK | cap->arg, NULL);
	cap->count1 -= 1;
    }

#ifdef FEAT_SEARCH_EXTRA
    // Redraw the window to refresh the highlighted matches.
    if (i > 0 && p_hls && !no_hlsearch)
	redraw_later(UPD_SOME_VALID);
#endif
}

/*
 * Search for "pat" in direction "dir" ('/' or '?', 0 for repeat).
 * Uses only cap->count1 and cap->oap from "cap".
 * Return 0 for failure, 1 for found, 2 for found and line offset added.
 */
    static int
normal_search(
    cmdarg_T	*cap,
    int		dir,
    char_u	*pat,
    int		opt,		// extra flags for do_search()
    int		*wrapped)
{
    int		i;
    searchit_arg_T sia;
#ifdef FEAT_SEARCH_EXTRA
    pos_T	prev_cursor = curwin->w_cursor;
#endif

    cap->oap->motion_type = MCHAR;
    cap->oap->inclusive = FALSE;
    cap->oap->use_reg_one = TRUE;
    curwin->w_set_curswant = TRUE;

    CLEAR_FIELD(sia);
    i = do_search(cap->oap, dir, dir, pat, cap->count1,
			    opt | SEARCH_OPT | SEARCH_ECHO | SEARCH_MSG, &sia);
    if (wrapped != NULL)
	*wrapped = sia.sa_wrapped;
    if (i == 0)
	clearop(cap->oap);
    else
    {
	if (i == 2)
	    cap->oap->motion_type = MLINE;
	curwin->w_cursor.coladd = 0;
#ifdef FEAT_FOLDING
	if (cap->oap->op_type == OP_NOP && (fdo_flags & FDO_SEARCH) && KeyTyped)
	    foldOpenCursor();
#endif
    }
#ifdef FEAT_SEARCH_EXTRA
    // Redraw the window to refresh the highlighted matches.
    if (!EQUAL_POS(curwin->w_cursor, prev_cursor) && p_hls && !no_hlsearch)
	redraw_later(UPD_SOME_VALID);
#endif

    // "/$" will put the cursor after the end of the line, may need to
    // correct that here
    check_cursor();
    return i;
}

/*
 * Character search commands.
 * cap->arg is BACKWARD for 'F' and 'T', FORWARD for 'f' and 't', TRUE for
 * ',' and FALSE for ';'.
 * cap->nchar is NUL for ',' and ';' (repeat the search)
 */
    static void
nv_csearch(cmdarg_T *cap)
{
    int		t_cmd;

    if (cap->cmdchar == 't' || cap->cmdchar == 'T')
	t_cmd = TRUE;
    else
	t_cmd = FALSE;

    cap->oap->motion_type = MCHAR;
    if (IS_SPECIAL(cap->nchar) || searchc(cap, t_cmd) == FAIL)
    {
	clearopbeep(cap->oap);
	return;
    }

    curwin->w_set_curswant = TRUE;
    // Include a Tab for "tx" and for "dfx".
    if (gchar_cursor() == TAB && virtual_active() && cap->arg == FORWARD
	    && (t_cmd || cap->oap->op_type != OP_NOP))
    {
	colnr_T	scol, ecol;

	getvcol(curwin, &curwin->w_cursor, &scol, NULL, &ecol);
	curwin->w_cursor.coladd = ecol - scol;
    }
    else
	curwin->w_cursor.coladd = 0;
    adjust_for_sel(cap);
#ifdef FEAT_FOLDING
    if ((fdo_flags & FDO_HOR) && KeyTyped && cap->oap->op_type == OP_NOP)
	foldOpenCursor();
#endif
}

/*
 * "[{", "[(", "]}" or "])": go to Nth unclosed '{', '(', '}' or ')'
 * "[#", "]#": go to start/end of Nth innermost #if..#endif construct.
 * "[/", "[*", "]/", "]*": go to Nth comment start/end.
 * "[m" or "]m" search for prev/next start of (Java) method.
 * "[M" or "]M" search for prev/next end of (Java) method.
 */
    static void
nv_bracket_block(cmdarg_T *cap, pos_T *old_pos)
{
    pos_T	new_pos = {0, 0, 0};
    pos_T	*pos = NULL;	    // init for GCC
    pos_T	prev_pos;
    long	n;
    int		findc;
    int		c;

    if (cap->nchar == '*')
	cap->nchar = '/';
    prev_pos.lnum = 0;
    if (cap->nchar == 'm' || cap->nchar == 'M')
    {
	if (cap->cmdchar == '[')
	    findc = '{';
	else
	    findc = '}';
	n = 9999;
    }
    else
    {
	findc = cap->nchar;
	n = cap->count1;
    }
    for ( ; n > 0; --n)
    {
	if ((pos = findmatchlimit(cap->oap, findc,
			(cap->cmdchar == '[') ? FM_BACKWARD : FM_FORWARD, 0)) == NULL)
	{
	    if (new_pos.lnum == 0)	// nothing found
	    {
		if (cap->nchar != 'm' && cap->nchar != 'M')
		    clearopbeep(cap->oap);
	    }
	    else
		pos = &new_pos;	// use last one found
	    break;
	}
	prev_pos = new_pos;
	curwin->w_cursor = *pos;
	new_pos = *pos;
    }
    curwin->w_cursor = *old_pos;

    // Handle "[m", "]m", "[M" and "[M".  The findmatchlimit() only
    // brought us to the match for "[m" and "]M" when inside a method.
    // Try finding the '{' or '}' we want to be at.
    // Also repeat for the given count.
    if (cap->nchar == 'm' || cap->nchar == 'M')
    {
	// norm is TRUE for "]M" and "[m"
	int	    norm = ((findc == '{') == (cap->nchar == 'm'));

	n = cap->count1;
	// found a match: we were inside a method
	if (prev_pos.lnum != 0)
	{
	    pos = &prev_pos;
	    curwin->w_cursor = prev_pos;
	    if (norm)
		--n;
	}
	else
	    pos = NULL;
	while (n > 0)
	{
	    for (;;)
	    {
		if ((findc == '{' ? dec_cursor() : inc_cursor()) < 0)
		{
		    // if not found anything, that's an error
		    if (pos == NULL)
			clearopbeep(cap->oap);
		    n = 0;
		    break;
		}
		c = gchar_cursor();
		if (c == '{' || c == '}')
		{
		    // Must have found end/start of class: use it.
		    // Or found the place to be at.
		    if ((c == findc && norm) || (n == 1 && !norm))
		    {
			new_pos = curwin->w_cursor;
			pos = &new_pos;
			n = 0;
		    }
		    // if no match found at all, we started outside of the
		    // class and we're inside now.  Just go on.
		    else if (new_pos.lnum == 0)
		    {
			new_pos = curwin->w_cursor;
			pos = &new_pos;
		    }
		    // found start/end of other method: go to match
		    else if ((pos = findmatchlimit(cap->oap, findc,
			      (cap->cmdchar == '[') ? FM_BACKWARD : FM_FORWARD,
								   0)) == NULL)
			n = 0;
		    else
			curwin->w_cursor = *pos;
		    break;
		}
	    }
	    --n;
	}
	curwin->w_cursor = *old_pos;
	if (pos == NULL && new_pos.lnum != 0)
	    clearopbeep(cap->oap);
    }
    if (pos != NULL)
    {
	setpcmark();
	curwin->w_cursor = *pos;
	curwin->w_set_curswant = TRUE;
#ifdef FEAT_FOLDING
	if ((fdo_flags & FDO_BLOCK) && KeyTyped
		&& cap->oap->op_type == OP_NOP)
	    foldOpenCursor();
#endif
    }
}

/*
 * "[" and "]" commands.
 * cap->arg is BACKWARD for "[" and FORWARD for "]".
 */
    static void
nv_brackets(cmdarg_T *cap)
{
    pos_T	prev_pos;
    pos_T	*pos = NULL;	    // init for GCC
    pos_T	old_pos;	    // cursor position before command
    int		flag;
    long	n;

    cap->oap->motion_type = MCHAR;
    cap->oap->inclusive = FALSE;
    old_pos = curwin->w_cursor;
    curwin->w_cursor.coladd = 0;    // TODO: don't do this for an error.

    // "[f" or "]f" : Edit file under the cursor (same as "gf")
    if (cap->nchar == 'f')
	nv_gotofile(cap);
    else

#ifdef FEAT_FIND_ID
    // Find the occurrence(s) of the identifier or define under cursor
    // in current and included files or jump to the first occurrence.
    //
    //			search	     list	    jump
    //		      fwd   bwd    fwd	 bwd	 fwd	bwd
    // identifier     "]i"  "[i"   "]I"  "[I"	"]^I"  "[^I"
    // define	      "]d"  "[d"   "]D"  "[D"	"]^D"  "[^D"
    if (vim_strchr((char_u *)"iI\011dD\004", cap->nchar) != NULL)
    {
	char_u	*ptr;
	int	len;

	if ((len = find_ident_under_cursor(&ptr, FIND_IDENT)) == 0)
	    clearop(cap->oap);
	else
	{
	    // Make a copy, if the line was changed it will be freed.
	    ptr = vim_strnsave(ptr, len);
	    if (ptr == NULL)
		return;

	    find_pattern_in_path(ptr, 0, len, TRUE,
		cap->count0 == 0 ? !isupper(cap->nchar) : FALSE,
		((cap->nchar & 0xf) == ('d' & 0xf)) ?  FIND_DEFINE : FIND_ANY,
		cap->count1,
		isupper(cap->nchar) ? ACTION_SHOW_ALL :
			    islower(cap->nchar) ? ACTION_SHOW : ACTION_GOTO,
		cap->cmdchar == ']' ? curwin->w_cursor.lnum + 1 : (linenr_T)1,
		(linenr_T)MAXLNUM);
	    vim_free(ptr);
	    curwin->w_set_curswant = TRUE;
	}
    }
    else
#endif

    // "[{", "[(", "]}" or "])": go to Nth unclosed '{', '(', '}' or ')'
    // "[#", "]#": go to start/end of Nth innermost #if..#endif construct.
    // "[/", "[*", "]/", "]*": go to Nth comment start/end.
    // "[m" or "]m" search for prev/next start of (Java) method.
    // "[M" or "]M" search for prev/next end of (Java) method.
    if (  (cap->cmdchar == '['
		&& vim_strchr((char_u *)"{(*/#mM", cap->nchar) != NULL)
	    || (cap->cmdchar == ']'
		&& vim_strchr((char_u *)"})*/#mM", cap->nchar) != NULL))
	nv_bracket_block(cap, &old_pos);

    // "[[", "[]", "]]" and "][": move to start or end of function
    else if (cap->nchar == '[' || cap->nchar == ']')
    {
	if (cap->nchar == cap->cmdchar)		    // "]]" or "[["
	    flag = '{';
	else
	    flag = '}';		    // "][" or "[]"

	curwin->w_set_curswant = TRUE;
	// Imitate strange Vi behaviour: When using "]]" with an operator
	// we also stop at '}'.
	if (!findpar(&cap->oap->inclusive, cap->arg, cap->count1, flag,
	      (cap->oap->op_type != OP_NOP
				      && cap->arg == FORWARD && flag == '{')))
	    clearopbeep(cap->oap);
	else
	{
	    if (cap->oap->op_type == OP_NOP)
		beginline(BL_WHITE | BL_FIX);
#ifdef FEAT_FOLDING
	    if ((fdo_flags & FDO_BLOCK) && KeyTyped && cap->oap->op_type == OP_NOP)
		foldOpenCursor();
#endif
	}
    }

    // "[p", "[P", "]P" and "]p": put with indent adjustment
    else if (cap->nchar == 'p' || cap->nchar == 'P')
    {
	nv_put_opt(cap, TRUE);
    }

    // "['", "[`", "]'" and "]`": jump to next mark
    else if (cap->nchar == '\'' || cap->nchar == '`')
    {
	pos = &curwin->w_cursor;
	for (n = cap->count1; n > 0; --n)
	{
	    prev_pos = *pos;
	    pos = getnextmark(pos, cap->cmdchar == '[' ? BACKWARD : FORWARD,
							  cap->nchar == '\'');
	    if (pos == NULL)
		break;
	}
	if (pos == NULL)
	    pos = &prev_pos;
	nv_cursormark(cap, cap->nchar == '\'', pos);
    }

    // [ or ] followed by a middle mouse click: put selected text with
    // indent adjustment.  Any other button just does as usual.
    else if (cap->nchar >= K_RIGHTRELEASE && cap->nchar <= K_LEFTMOUSE)
    {
	(void)do_mouse(cap->oap, cap->nchar,
		       (cap->cmdchar == ']') ? FORWARD : BACKWARD,
		       cap->count1, PUT_FIXINDENT);
    }

#ifdef FEAT_FOLDING
    // "[z" and "]z": move to start or end of open fold.
    else if (cap->nchar == 'z')
    {
	if (foldMoveTo(FALSE, cap->cmdchar == ']' ? FORWARD : BACKWARD,
							 cap->count1) == FAIL)
	    clearopbeep(cap->oap);
    }
#endif

#ifdef FEAT_DIFF
    // "[c" and "]c": move to next or previous diff-change.
    else if (cap->nchar == 'c')
    {
	if (diff_move_to(cap->cmdchar == ']' ? FORWARD : BACKWARD,
							 cap->count1) == FAIL)
	    clearopbeep(cap->oap);
    }
#endif

#ifdef FEAT_SPELL
    // "[s", "[S", "]s" and "]S": move to next spell error.
    else if (cap->nchar == 's' || cap->nchar == 'S')
    {
	setpcmark();
	for (n = 0; n < cap->count1; ++n)
	    if (spell_move_to(curwin, cap->cmdchar == ']' ? FORWARD : BACKWARD,
			  cap->nchar == 's' ? TRUE : FALSE, FALSE, NULL) == 0)
	    {
		clearopbeep(cap->oap);
		break;
	    }
	    else
		curwin->w_set_curswant = TRUE;
# ifdef FEAT_FOLDING
	if (cap->oap->op_type == OP_NOP && (fdo_flags & FDO_SEARCH) && KeyTyped)
	    foldOpenCursor();
# endif
    }
#endif

    // Not a valid cap->nchar.
    else
	clearopbeep(cap->oap);
}

/*
 * Handle Normal mode "%" command.
 */
    static void
nv_percent(cmdarg_T *cap)
{
    pos_T	*pos;
#if defined(FEAT_FOLDING)
    linenr_T	lnum = curwin->w_cursor.lnum;
#endif

    cap->oap->inclusive = TRUE;
    if (cap->count0)	    // {cnt}% : goto {cnt} percentage in file
    {
	if (cap->count0 > 100)
	    clearopbeep(cap->oap);
	else
	{
	    cap->oap->motion_type = MLINE;
	    setpcmark();
	    // Round up, so 'normal 100%' always jumps at the line line.
	    // Beyond 21474836 lines, (ml_line_count * 100 + 99) would
	    // overflow on 32-bits, so use a formula with less accuracy
	    // to avoid overflows.
	    if (curbuf->b_ml.ml_line_count >= 21474836)
		curwin->w_cursor.lnum = (curbuf->b_ml.ml_line_count + 99L)
							 / 100L * cap->count0;
	    else
		curwin->w_cursor.lnum = (curbuf->b_ml.ml_line_count *
						    cap->count0 + 99L) / 100L;
	    if (curwin->w_cursor.lnum < 1)
		curwin->w_cursor.lnum = 1;
	    if (curwin->w_cursor.lnum > curbuf->b_ml.ml_line_count)
		curwin->w_cursor.lnum = curbuf->b_ml.ml_line_count;
	    beginline(BL_SOL | BL_FIX);
	}
    }
    else		    // "%" : go to matching paren
    {
	cap->oap->motion_type = MCHAR;
	cap->oap->use_reg_one = TRUE;
	if ((pos = findmatch(cap->oap, NUL)) == NULL)
	    clearopbeep(cap->oap);
	else
	{
	    setpcmark();
	    curwin->w_cursor = *pos;
	    curwin->w_set_curswant = TRUE;
	    curwin->w_cursor.coladd = 0;
	    adjust_for_sel(cap);
	}
    }
#ifdef FEAT_FOLDING
    if (cap->oap->op_type == OP_NOP
	    && lnum != curwin->w_cursor.lnum
	    && (fdo_flags & FDO_PERCENT)
	    && KeyTyped)
	foldOpenCursor();
#endif
}

/*
 * Handle "(" and ")" commands.
 * cap->arg is BACKWARD for "(" and FORWARD for ")".
 */
    static void
nv_brace(cmdarg_T *cap)
{
    cap->oap->motion_type = MCHAR;
    cap->oap->use_reg_one = TRUE;
    // The motion used to be inclusive for "(", but that is not what Vi does.
    cap->oap->inclusive = FALSE;
    curwin->w_set_curswant = TRUE;

    if (findsent(cap->arg, cap->count1) == FAIL)
    {
	clearopbeep(cap->oap);
	return;
    }

    // Don't leave the cursor on the NUL past end of line.
    adjust_cursor(cap->oap);
    curwin->w_cursor.coladd = 0;
#ifdef FEAT_FOLDING
    if ((fdo_flags & FDO_BLOCK) && KeyTyped && cap->oap->op_type == OP_NOP)
	foldOpenCursor();
#endif
}

/*
 * "m" command: Mark a position.
 */
    static void
nv_mark(cmdarg_T *cap)
{
    if (checkclearop(cap->oap))
	return;

    if (setmark(cap->nchar) == FAIL)
	clearopbeep(cap->oap);
}

/*
 * "{" and "}" commands.
 * cmd->arg is BACKWARD for "{" and FORWARD for "}".
 */
    static void
nv_findpar(cmdarg_T *cap)
{
    cap->oap->motion_type = MCHAR;
    cap->oap->inclusive = FALSE;
    cap->oap->use_reg_one = TRUE;
    curwin->w_set_curswant = TRUE;
    if (!findpar(&cap->oap->inclusive, cap->arg, cap->count1, NUL, FALSE))
    {
	clearopbeep(cap->oap);
	return;
    }

    curwin->w_cursor.coladd = 0;
#ifdef FEAT_FOLDING
    if ((fdo_flags & FDO_BLOCK) && KeyTyped && cap->oap->op_type == OP_NOP)
	foldOpenCursor();
#endif
}

/*
 * "u" command: Undo or make lower case.
 */
    static void
nv_undo(cmdarg_T *cap)
{
    if (cap->oap->op_type == OP_LOWER || VIsual_active)
    {
	// translate "<Visual>u" to "<Visual>gu" and "guu" to "gugu"
	cap->cmdchar = 'g';
	cap->nchar = 'u';
	nv_operator(cap);
    }
    else
	nv_kundo(cap);
}

/*
 * <Undo> command.
 */
    static void
nv_kundo(cmdarg_T *cap)
{
    if (checkclearopq(cap->oap))
	return;

#ifdef FEAT_JOB_CHANNEL
    if (bt_prompt(curbuf))
    {
	clearopbeep(cap->oap);
	return;
    }
#endif
    u_undo((int)cap->count1);
    curwin->w_set_curswant = TRUE;
}

/*
 * Handle the "r" command.
 */
    static void
nv_replace(cmdarg_T *cap)
{
    char_u	*ptr;
    int		had_ctrl_v;
    long	n;

    if (checkclearop(cap->oap))
	return;
#ifdef FEAT_JOB_CHANNEL
    if (bt_prompt(curbuf) && !prompt_curpos_editable())
    {
	clearopbeep(cap->oap);
	return;
    }
#endif

    // get another character
    if (cap->nchar == Ctrl_V)
    {
	had_ctrl_v = Ctrl_V;
	cap->nchar = get_literal(FALSE);
	// Don't redo a multibyte character with CTRL-V.
	if (cap->nchar > DEL)
	    had_ctrl_v = NUL;
    }
    else
	had_ctrl_v = NUL;

    // Abort if the character is a special key.
    if (IS_SPECIAL(cap->nchar))
    {
	clearopbeep(cap->oap);
	return;
    }

    // Visual mode "r"
    if (VIsual_active)
    {
	if (got_int)
	    reset_VIsual();
	if (had_ctrl_v)
	{
	    // Use a special (negative) number to make a difference between a
	    // literal CR or NL and a line break.
	    if (cap->nchar == CAR)
		cap->nchar = REPLACE_CR_NCHAR;
	    else if (cap->nchar == NL)
		cap->nchar = REPLACE_NL_NCHAR;
	}
	nv_operator(cap);
	return;
    }

    // Break tabs, etc.
    if (virtual_active())
    {
	if (u_save_cursor() == FAIL)
	    return;
	if (gchar_cursor() == NUL)
	{
	    // Add extra space and put the cursor on the first one.
	    coladvance_force((colnr_T)(getviscol() + cap->count1));
	    curwin->w_cursor.col -= cap->count1;
	}
	else if (gchar_cursor() == TAB)
	    coladvance_force(getviscol());
    }

    // Abort if not enough characters to replace.
    ptr = ml_get_cursor();
    if (STRLEN(ptr) < (unsigned)cap->count1
	    || (has_mbyte && mb_charlen(ptr) < cap->count1))
    {
	clearopbeep(cap->oap);
	return;
    }

    // Replacing with a TAB is done by edit() when it is complicated because
    // 'expandtab' or 'smarttab' is set.  CTRL-V TAB inserts a literal TAB.
    // Other characters are done below to avoid problems with things like
    // CTRL-V 048 (for edit() this would be R CTRL-V 0 ESC).
    if (had_ctrl_v != Ctrl_V && cap->nchar == '\t' && (curbuf->b_p_et || p_sta))
    {
	stuffnumReadbuff(cap->count1);
	stuffcharReadbuff('R');
	stuffcharReadbuff('\t');
	stuffcharReadbuff(ESC);
	return;
    }

    // save line for undo
    if (u_save_cursor() == FAIL)
	return;

    if (had_ctrl_v != Ctrl_V && (cap->nchar == '\r' || cap->nchar == '\n'))
    {
	// Replace character(s) by a single newline.
	// Strange vi behaviour: Only one newline is inserted.
	// Delete the characters here.
	// Insert the newline with an insert command, takes care of
	// autoindent.	The insert command depends on being on the last
	// character of a line or not.
	(void)del_chars(cap->count1, FALSE);	// delete the characters
	stuffcharReadbuff('\r');
	stuffcharReadbuff(ESC);

	// Give 'r' to edit(), to get the redo command right.
	invoke_edit(cap, TRUE, 'r', FALSE);
    }
    else
    {
	prep_redo(cap->oap->regname, cap->count1,
				       NUL, 'r', NUL, had_ctrl_v, cap->nchar);

	curbuf->b_op_start = curwin->w_cursor;
	if (has_mbyte)
	{
	    int		old_State = State;

	    if (cap->ncharC1 != 0)
		AppendCharToRedobuff(cap->ncharC1);
	    if (cap->ncharC2 != 0)
		AppendCharToRedobuff(cap->ncharC2);

	    // This is slow, but it handles replacing a single-byte with a
	    // multi-byte and the other way around.  Also handles adding
	    // composing characters for utf-8.
	    for (n = cap->count1; n > 0; --n)
	    {
		State = MODE_REPLACE;
		if (cap->nchar == Ctrl_E || cap->nchar == Ctrl_Y)
		{
		    int c = ins_copychar(curwin->w_cursor.lnum
					   + (cap->nchar == Ctrl_Y ? -1 : 1));
		    if (c != NUL)
			ins_char(c);
		    else
			// will be decremented further down
			++curwin->w_cursor.col;
		}
		else
		    ins_char(cap->nchar);
		State = old_State;
		if (cap->ncharC1 != 0)
		    ins_char(cap->ncharC1);
		if (cap->ncharC2 != 0)
		    ins_char(cap->ncharC2);
	    }
	}
	else
	{
	    // Replace the characters within one line.
	    for (n = cap->count1; n > 0; --n)
	    {
		// Get ptr again, because u_save and/or showmatch() will have
		// released the line.  This may also happen in ins_copychar().
		// At the same time we let know that the line will be changed.
		if (cap->nchar == Ctrl_E || cap->nchar == Ctrl_Y)
		{
		  int c = ins_copychar(curwin->w_cursor.lnum
					   + (cap->nchar == Ctrl_Y ? -1 : 1));

		  ptr = ml_get_buf(curbuf, curwin->w_cursor.lnum, TRUE);
		  if (c != NUL)
		    ptr[curwin->w_cursor.col] = c;
		}
		else
		{
		    ptr = ml_get_buf(curbuf, curwin->w_cursor.lnum, TRUE);
		    ptr[curwin->w_cursor.col] = cap->nchar;
		}
		if (p_sm && msg_silent == 0)
		    showmatch(cap->nchar);
		++curwin->w_cursor.col;
	    }
#ifdef FEAT_NETBEANS_INTG
	    if (netbeans_active())
	    {
		colnr_T  start = (colnr_T)(curwin->w_cursor.col - cap->count1);

		netbeans_removed(curbuf, curwin->w_cursor.lnum, start,
							   cap->count1);
		netbeans_inserted(curbuf, curwin->w_cursor.lnum, start,
					       &ptr[start], (int)cap->count1);
	    }
#endif

	    // mark the buffer as changed and prepare for displaying
	    changed_bytes(curwin->w_cursor.lnum,
			       (colnr_T)(curwin->w_cursor.col - cap->count1));
	}
	--curwin->w_cursor.col;	    // cursor on the last replaced char
	// if the character on the left of the current cursor is a multi-byte
	// character, move two characters left
	if (has_mbyte)
	    mb_adjust_cursor();
	curbuf->b_op_end = curwin->w_cursor;
	curwin->w_set_curswant = TRUE;
	set_last_insert(cap->nchar);
    }
}

/*
 * 'o': Exchange start and end of Visual area.
 * 'O': same, but in block mode exchange left and right corners.
 */
    static void
v_swap_corners(int cmdchar)
{
    pos_T	old_cursor;
    colnr_T	left, right;

    if (cmdchar == 'O' && VIsual_mode == Ctrl_V)
    {
	old_cursor = curwin->w_cursor;
	getvcols(curwin, &old_cursor, &VIsual, &left, &right);
	curwin->w_cursor.lnum = VIsual.lnum;
	coladvance(left);
	VIsual = curwin->w_cursor;

	curwin->w_cursor.lnum = old_cursor.lnum;
	curwin->w_curswant = right;
	// 'selection "exclusive" and cursor at right-bottom corner: move it
	// right one column
	if (old_cursor.lnum >= VIsual.lnum && *p_sel == 'e')
	    ++curwin->w_curswant;
	coladvance(curwin->w_curswant);
	if (curwin->w_cursor.col == old_cursor.col
		&& (!virtual_active()
		    || curwin->w_cursor.coladd == old_cursor.coladd))
	{
	    curwin->w_cursor.lnum = VIsual.lnum;
	    if (old_cursor.lnum <= VIsual.lnum && *p_sel == 'e')
		++right;
	    coladvance(right);
	    VIsual = curwin->w_cursor;

	    curwin->w_cursor.lnum = old_cursor.lnum;
	    coladvance(left);
	    curwin->w_curswant = left;
	}
    }
    else
    {
	old_cursor = curwin->w_cursor;
	curwin->w_cursor = VIsual;
	VIsual = old_cursor;
	curwin->w_set_curswant = TRUE;
    }
}

/*
 * "R" (cap->arg is FALSE) and "gR" (cap->arg is TRUE).
 */
    static void
nv_Replace(cmdarg_T *cap)
{
    if (VIsual_active)		// "R" is replace lines
    {
	cap->cmdchar = 'c';
	cap->nchar = NUL;
	VIsual_mode_orig = VIsual_mode; // remember original area for gv
	VIsual_mode = 'V';
	nv_operator(cap);
	return;
    }

    if (checkclearopq(cap->oap))
	return;

    if (!curbuf->b_p_ma)
	emsg(_(e_cannot_make_changes_modifiable_is_off));
    else
    {
	if (virtual_active())
	    coladvance(getviscol());
	invoke_edit(cap, FALSE, cap->arg ? 'V' : 'R', FALSE);
    }
}

/*
 * "gr".
 */
    static void
nv_vreplace(cmdarg_T *cap)
{
    if (VIsual_active)
    {
	cap->cmdchar = 'r';
	cap->nchar = cap->extra_char;
	nv_replace(cap);	// Do same as "r" in Visual mode for now
	return;
    }

    if (checkclearopq(cap->oap))
	return;

    if (!curbuf->b_p_ma)
	emsg(_(e_cannot_make_changes_modifiable_is_off));
    else
    {
	if (cap->extra_char == Ctrl_V)	// get another character
	    cap->extra_char = get_literal(FALSE);
	if (cap->extra_char < ' ')
	    // Prefix a control character with CTRL-V to avoid it being used as
	    // a command.
	    stuffcharReadbuff(Ctrl_V);
	stuffcharReadbuff(cap->extra_char);
	stuffcharReadbuff(ESC);
	if (virtual_active())
	    coladvance(getviscol());
	invoke_edit(cap, TRUE, 'v', FALSE);
    }
}

/*
 * Swap case for "~" command, when it does not work like an operator.
 */
    static void
n_swapchar(cmdarg_T *cap)
{
    long	n;
    pos_T	startpos;
    int		did_change = 0;
#ifdef FEAT_NETBEANS_INTG
    pos_T	pos;
    char_u	*ptr;
    int		count;
#endif

    if (checkclearopq(cap->oap))
	return;

    if (LINEEMPTY(curwin->w_cursor.lnum) && vim_strchr(p_ww, '~') == NULL)
    {
	clearopbeep(cap->oap);
	return;
    }

    prep_redo_cmd(cap);

    if (u_save_cursor() == FAIL)
	return;

    startpos = curwin->w_cursor;
#ifdef FEAT_NETBEANS_INTG
    pos = startpos;
#endif
    for (n = cap->count1; n > 0; --n)
    {
	did_change |= swapchar(cap->oap->op_type, &curwin->w_cursor);
	inc_cursor();
	if (gchar_cursor() == NUL)
	{
	    if (vim_strchr(p_ww, '~') != NULL
		    && curwin->w_cursor.lnum < curbuf->b_ml.ml_line_count)
	    {
#ifdef FEAT_NETBEANS_INTG
		if (netbeans_active())
		{
		    if (did_change)
		    {
			ptr = ml_get(pos.lnum);
			count = (int)STRLEN(ptr) - pos.col;
			netbeans_removed(curbuf, pos.lnum, pos.col,
								 (long)count);
			// line may have been flushed, get it again
			ptr = ml_get(pos.lnum);
			netbeans_inserted(curbuf, pos.lnum, pos.col,
							&ptr[pos.col], count);
		    }
		    pos.col = 0;
		    pos.lnum++;
		}
#endif
		++curwin->w_cursor.lnum;
		curwin->w_cursor.col = 0;
		if (n > 1)
		{
		    if (u_savesub(curwin->w_cursor.lnum) == FAIL)
			break;
		    u_clearline();
		}
	    }
	    else
		break;
	}
    }
#ifdef FEAT_NETBEANS_INTG
    if (did_change && netbeans_active())
    {
	ptr = ml_get(pos.lnum);
	count = curwin->w_cursor.col - pos.col;
	netbeans_removed(curbuf, pos.lnum, pos.col, (long)count);
	netbeans_inserted(curbuf, pos.lnum, pos.col, &ptr[pos.col], count);
    }
#endif


    check_cursor();
    curwin->w_set_curswant = TRUE;
    if (did_change)
    {
	changed_lines(startpos.lnum, startpos.col, curwin->w_cursor.lnum + 1,
									  0L);
	curbuf->b_op_start = startpos;
	curbuf->b_op_end = curwin->w_cursor;
	if (curbuf->b_op_end.col > 0)
	    --curbuf->b_op_end.col;
    }
}

/*
 * Move cursor to mark.
 */
    static void
nv_cursormark(cmdarg_T *cap, int flag, pos_T *pos)
{
    if (check_mark(pos) == FAIL)
	clearop(cap->oap);
    else
    {
	if (cap->cmdchar == '\''
		|| cap->cmdchar == '`'
		|| cap->cmdchar == '['
		|| cap->cmdchar == ']')
	    setpcmark();
	curwin->w_cursor = *pos;
	if (flag)
	    beginline(BL_WHITE | BL_FIX);
	else
	    check_cursor();
    }
    cap->oap->motion_type = flag ? MLINE : MCHAR;
    if (cap->cmdchar == '`')
	cap->oap->use_reg_one = TRUE;
    cap->oap->inclusive = FALSE;		// ignored if not MCHAR
    curwin->w_set_curswant = TRUE;
}

/*
 * Handle commands that are operators in Visual mode.
 */
    static void
v_visop(cmdarg_T *cap)
{
    static char_u trans[] = "YyDdCcxdXdAAIIrr";

    // Uppercase means linewise, except in block mode, then "D" deletes till
    // the end of the line, and "C" replaces till EOL
    if (isupper(cap->cmdchar))
    {
	if (VIsual_mode != Ctrl_V)
	{
	    VIsual_mode_orig = VIsual_mode;
	    VIsual_mode = 'V';
	}
	else if (cap->cmdchar == 'C' || cap->cmdchar == 'D')
	    curwin->w_curswant = MAXCOL;
    }
    cap->cmdchar = *(vim_strchr(trans, cap->cmdchar) + 1);
    nv_operator(cap);
}

/*
 * "s" and "S" commands.
 */
    static void
nv_subst(cmdarg_T *cap)
{
#ifdef FEAT_TERMINAL
    // When showing output of term_dumpdiff() swap the top and bottom.
    if (term_swap_diff() == OK)
	return;
#endif
#ifdef FEAT_JOB_CHANNEL
    if (bt_prompt(curbuf) && !prompt_curpos_editable())
    {
	clearopbeep(cap->oap);
	return;
    }
#endif
    if (VIsual_active)	// "vs" and "vS" are the same as "vc"
    {
	if (cap->cmdchar == 'S')
	{
	    VIsual_mode_orig = VIsual_mode;
	    VIsual_mode = 'V';
	}
	cap->cmdchar = 'c';
	nv_operator(cap);
    }
    else
	nv_optrans(cap);
}

/*
 * Abbreviated commands.
 */
    static void
nv_abbrev(cmdarg_T *cap)
{
    if (cap->cmdchar == K_DEL || cap->cmdchar == K_KDEL)
	cap->cmdchar = 'x';		// DEL key behaves like 'x'

    // in Visual mode these commands are operators
    if (VIsual_active)
	v_visop(cap);
    else
	nv_optrans(cap);
}

/*
 * Translate a command into another command.
 */
    static void
nv_optrans(cmdarg_T *cap)
{
    static char_u *(ar[8]) = {(char_u *)"dl", (char_u *)"dh",
			      (char_u *)"d$", (char_u *)"c$",
			      (char_u *)"cl", (char_u *)"cc",
			      (char_u *)"yy", (char_u *)":s\r"};
    static char_u *str = (char_u *)"xXDCsSY&";

    if (!checkclearopq(cap->oap))
    {
	// In Vi "2D" doesn't delete the next line.  Can't translate it
	// either, because "2." should also not use the count.
	if (cap->cmdchar == 'D' && vim_strchr(p_cpo, CPO_HASH) != NULL)
	{
	    cap->oap->start = curwin->w_cursor;
	    cap->oap->op_type = OP_DELETE;
#ifdef FEAT_EVAL
	    set_op_var(OP_DELETE);
#endif
	    cap->count1 = 1;
	    nv_dollar(cap);
	    finish_op = TRUE;
	    ResetRedobuff();
	    AppendCharToRedobuff('D');
	}
	else
	{
	    if (cap->count0)
		stuffnumReadbuff(cap->count0);
	    stuffReadbuff(ar[(int)(vim_strchr(str, cap->cmdchar) - str)]);
	}
    }
    cap->opcount = 0;
}

/*
 * "'" and "`" commands.  Also for "g'" and "g`".
 * cap->arg is TRUE for "'" and "g'".
 */
    static void
nv_gomark(cmdarg_T *cap)
{
    pos_T	*pos;
    int		c;
#ifdef FEAT_FOLDING
    pos_T	old_cursor = curwin->w_cursor;
    int		old_KeyTyped = KeyTyped;    // getting file may reset it
#endif

    if (cap->cmdchar == 'g')
	c = cap->extra_char;
    else
	c = cap->nchar;
    pos = getmark(c, (cap->oap->op_type == OP_NOP));
    if (pos == (pos_T *)-1)	    // jumped to other file
    {
	if (cap->arg)
	{
	    check_cursor_lnum();
	    beginline(BL_WHITE | BL_FIX);
	}
	else
	    check_cursor();
    }
    else
	nv_cursormark(cap, cap->arg, pos);

    // May need to clear the coladd that a mark includes.
    if (!virtual_active())
	curwin->w_cursor.coladd = 0;
    check_cursor_col();
#ifdef FEAT_FOLDING
    if (cap->oap->op_type == OP_NOP
	    && pos != NULL
	    && (pos == (pos_T *)-1 || !EQUAL_POS(old_cursor, *pos))
	    && (fdo_flags & FDO_MARK)
	    && old_KeyTyped)
	foldOpenCursor();
#endif
}

/*
 * Handle CTRL-O, CTRL-I, "g;", "g," and "CTRL-Tab" commands.
 */
    static void
nv_pcmark(cmdarg_T *cap)
{
    pos_T	*pos;
#ifdef FEAT_FOLDING
    linenr_T	lnum = curwin->w_cursor.lnum;
    int		old_KeyTyped = KeyTyped;    // getting file may reset it
#endif

    if (checkclearopq(cap->oap))
	return;

    if (cap->cmdchar == TAB && mod_mask == MOD_MASK_CTRL)
    {
	if (goto_tabpage_lastused() == FAIL)
	    clearopbeep(cap->oap);
	return;
    }
    if (cap->cmdchar == 'g')
	pos = movechangelist((int)cap->count1);
    else
	pos = movemark((int)cap->count1);
    if (pos == (pos_T *)-1)		// jump to other file
    {
	curwin->w_set_curswant = TRUE;
	check_cursor();
    }
    else if (pos != NULL)		    // can jump
	nv_cursormark(cap, FALSE, pos);
    else if (cap->cmdchar == 'g')
    {
	if (curbuf->b_changelistlen == 0)
	    emsg(_(e_changelist_is_empty));
	else if (cap->count1 < 0)
	    emsg(_(e_at_start_of_changelist));
	else
	    emsg(_(e_at_end_of_changelist));
    }
    else
	clearopbeep(cap->oap);
# ifdef FEAT_FOLDING
    if (cap->oap->op_type == OP_NOP
	    && (pos == (pos_T *)-1 || lnum != curwin->w_cursor.lnum)
	    && (fdo_flags & FDO_MARK)
	    && old_KeyTyped)
	foldOpenCursor();
# endif
}

/*
 * Handle '"' command.
 */
    static void
nv_regname(cmdarg_T *cap)
{
    if (checkclearop(cap->oap))
	return;
#ifdef FEAT_EVAL
    if (cap->nchar == '=')
	cap->nchar = get_expr_register();
#endif
    if (cap->nchar != NUL && valid_yank_reg(cap->nchar, FALSE))
    {
	cap->oap->regname = cap->nchar;
	cap->opcount = cap->count0;	// remember count before '"'
#ifdef FEAT_EVAL
	set_reg_var(cap->oap->regname);
#endif
    }
    else
	clearopbeep(cap->oap);
}

/*
 * Handle "v", "V" and "CTRL-V" commands.
 * Also for "gh", "gH" and "g^H" commands: Always start Select mode, cap->arg
 * is TRUE.
 * Handle CTRL-Q just like CTRL-V.
 */
    static void
nv_visual(cmdarg_T *cap)
{
    if (cap->cmdchar == Ctrl_Q)
	cap->cmdchar = Ctrl_V;

    // 'v', 'V' and CTRL-V can be used while an operator is pending to make it
    // characterwise, linewise, or blockwise.
    if (cap->oap->op_type != OP_NOP)
    {
	motion_force = cap->oap->motion_force = cap->cmdchar;
	finish_op = FALSE;	// operator doesn't finish now but later
	return;
    }

    VIsual_select = cap->arg;
    if (VIsual_active)	    // change Visual mode
    {
	if (VIsual_mode == cap->cmdchar)    // stop visual mode
	    end_visual_mode();
	else				    // toggle char/block mode
	{				    //	   or char/line mode
	    VIsual_mode = cap->cmdchar;
	    showmode();
	    may_trigger_modechanged();
	}
	redraw_curbuf_later(UPD_INVERTED);	    // update the inversion
    }
    else		    // start Visual mode
    {
	check_visual_highlight();
	if (cap->count0 > 0 && resel_VIsual_mode != NUL)
	{
	    // use previously selected part
	    VIsual = curwin->w_cursor;

	    VIsual_active = TRUE;
	    VIsual_reselect = TRUE;
	    if (!cap->arg)
		// start Select mode when 'selectmode' contains "cmd"
		may_start_select('c');
	    setmouse();
	    if (p_smd && msg_silent == 0)
		redraw_cmdline = TRUE;	    // show visual mode later
	    // For V and ^V, we multiply the number of lines even if there
	    // was only one -- webb
	    if (resel_VIsual_mode != 'v' || resel_VIsual_line_count > 1)
	    {
		curwin->w_cursor.lnum +=
				    resel_VIsual_line_count * cap->count0 - 1;
		check_cursor();
	    }
	    VIsual_mode = resel_VIsual_mode;
	    if (VIsual_mode == 'v')
	    {
		if (resel_VIsual_line_count <= 1)
		{
		    update_curswant_force();
		    curwin->w_curswant += resel_VIsual_vcol * cap->count0;
		    if (*p_sel != 'e')
			--curwin->w_curswant;
		}
		else
		    curwin->w_curswant = resel_VIsual_vcol;
		coladvance(curwin->w_curswant);
	    }
	    if (resel_VIsual_vcol == MAXCOL)
	    {
		curwin->w_curswant = MAXCOL;
		coladvance((colnr_T)MAXCOL);
	    }
	    else if (VIsual_mode == Ctrl_V)
	    {
		// Update curswant on the original line, that is where "col" is
		// valid.
		linenr_T lnum = curwin->w_cursor.lnum;
		curwin->w_cursor.lnum = VIsual.lnum;
		update_curswant_force();
		curwin->w_curswant += resel_VIsual_vcol * cap->count0 - 1;
		curwin->w_cursor.lnum = lnum;
		coladvance(curwin->w_curswant);
	    }
	    else
		curwin->w_set_curswant = TRUE;
	    redraw_curbuf_later(UPD_INVERTED);	// show the inversion
	}
	else
	{
	    if (!cap->arg)
		// start Select mode when 'selectmode' contains "cmd"
		may_start_select('c');
	    n_start_visual_mode(cap->cmdchar);
	    if (VIsual_mode != 'V' && *p_sel == 'e')
		++cap->count1;  // include one more char
	    if (cap->count0 > 0 && --cap->count1 > 0)
	    {
		// With a count select that many characters or lines.
		if (VIsual_mode == 'v' || VIsual_mode == Ctrl_V)
		    nv_right(cap);
		else if (VIsual_mode == 'V')
		    nv_down(cap);
	    }
	}
    }
}

/*
 * Start selection for Shift-movement keys.
 */
    void
start_selection(void)
{
    // if 'selectmode' contains "key", start Select mode
    may_start_select('k');
    n_start_visual_mode('v');
}

/*
 * Start Select mode, if "c" is in 'selectmode' and not in a mapping or menu.
 * When "c" is 'o' (checking for "mouse") then also when mapped.
 */
    void
may_start_select(int c)
{
    VIsual_select = (c == 'o' || (stuff_empty() && typebuf_typed()))
		    && vim_strchr(p_slm, c) != NULL;
}

/*
 * Start Visual mode "c".
 * Should set VIsual_select before calling this.
 */
    static void
n_start_visual_mode(int c)
{
#ifdef FEAT_CONCEAL
    int cursor_line_was_concealed = curwin->w_p_cole > 0
						&& conceal_cursor_line(curwin);
#endif

    VIsual_mode = c;
    VIsual_active = TRUE;
    VIsual_reselect = TRUE;

    // Corner case: the 0 position in a tab may change when going into
    // virtualedit.  Recalculate curwin->w_cursor to avoid bad highlighting.
    if (c == Ctrl_V && (get_ve_flags() & VE_BLOCK) && gchar_cursor() == TAB)
    {
	validate_virtcol();
	coladvance(curwin->w_virtcol);
    }
    VIsual = curwin->w_cursor;

#ifdef FEAT_FOLDING
    foldAdjustVisual();
#endif

    may_trigger_modechanged();
    setmouse();
#ifdef FEAT_CONCEAL
    // Check if redraw is needed after changing the state.
    conceal_check_cursor_line(cursor_line_was_concealed);
#endif

    if (p_smd && msg_silent == 0)
	redraw_cmdline = TRUE;	// show visual mode later
#ifdef FEAT_CLIPBOARD
    // Make sure the clipboard gets updated.  Needed because start and
    // end may still be the same, and the selection needs to be owned
    clip_star.vmode = NUL;
#endif

    // Only need to redraw this line, unless still need to redraw an old
    // Visual area (when 'lazyredraw' is set).
    if (curwin->w_redr_type < UPD_INVERTED)
    {
	curwin->w_old_cursor_lnum = curwin->w_cursor.lnum;
	curwin->w_old_visual_lnum = curwin->w_cursor.lnum;
    }
}


/*
 * CTRL-W: Window commands
 */
    static void
nv_window(cmdarg_T *cap)
{
    if (cap->nchar == ':')
    {
	// "CTRL-W :" is the same as typing ":"; useful in a terminal window
	cap->cmdchar = ':';
	cap->nchar = NUL;
	nv_colon(cap);
    }
    else if (!checkclearop(cap->oap))
	do_window(cap->nchar, cap->count0, NUL); // everything is in window.c
}

/*
 * CTRL-Z: Suspend
 */
    static void
nv_suspend(cmdarg_T *cap)
{
    clearop(cap->oap);
    if (VIsual_active)
	end_visual_mode();		// stop Visual mode
    do_cmdline_cmd((char_u *)"stop");
}

/*
 * "gv": Reselect the previous Visual area.  If Visual already active,
 *       exchange previous and current Visual area.
 */
    static void
nv_gv_cmd(cmdarg_T *cap)
{
    pos_T	tpos;
    int		i;

    if (checkclearop(cap->oap))
	return;

    if (curbuf->b_visual.vi_start.lnum == 0
	    || curbuf->b_visual.vi_start.lnum > curbuf->b_ml.ml_line_count
	    || curbuf->b_visual.vi_end.lnum == 0)
    {
	beep_flush();
	return;
    }

    // set w_cursor to the start of the Visual area, tpos to the end
    if (VIsual_active)
    {
	i = VIsual_mode;
	VIsual_mode = curbuf->b_visual.vi_mode;
	curbuf->b_visual.vi_mode = i;
# ifdef FEAT_EVAL
	curbuf->b_visual_mode_eval = i;
# endif
	i = curwin->w_curswant;
	curwin->w_curswant = curbuf->b_visual.vi_curswant;
	curbuf->b_visual.vi_curswant = i;

	tpos = curbuf->b_visual.vi_end;
	curbuf->b_visual.vi_end = curwin->w_cursor;
	curwin->w_cursor = curbuf->b_visual.vi_start;
	curbuf->b_visual.vi_start = VIsual;
    }
    else
    {
	VIsual_mode = curbuf->b_visual.vi_mode;
	curwin->w_curswant = curbuf->b_visual.vi_curswant;
	tpos = curbuf->b_visual.vi_end;
	curwin->w_cursor = curbuf->b_visual.vi_start;
    }

    VIsual_active = TRUE;
    VIsual_reselect = TRUE;

    // Set Visual to the start and w_cursor to the end of the Visual
    // area.  Make sure they are on an existing character.
    check_cursor();
    VIsual = curwin->w_cursor;
    curwin->w_cursor = tpos;
    check_cursor();
    update_topline();

    // When called from normal "g" command: start Select mode when
    // 'selectmode' contains "cmd".  When called for K_SELECT, always
    // start Select mode.
    if (cap->arg)
    {
	VIsual_select = TRUE;
	VIsual_select_reg = 0;
    }
    else
	may_start_select('c');
    setmouse();
#ifdef FEAT_CLIPBOARD
    // Make sure the clipboard gets updated.  Needed because start and
    // end are still the same, and the selection needs to be owned
    clip_star.vmode = NUL;
#endif
    redraw_curbuf_later(UPD_INVERTED);
    showmode();
}

/*
 * "g0", "g^" : Like "0" and "^" but for screen lines.
 * "gm": middle of "g0" and "g$".
 */
    static void
nv_g_home_m_cmd(cmdarg_T *cap)
{
    int		i;
    int		flag = FALSE;

    if (cap->nchar == '^')
	flag = TRUE;

    cap->oap->motion_type = MCHAR;
    cap->oap->inclusive = FALSE;
    if (curwin->w_p_wrap && curwin->w_width != 0)
    {
	int	width1 = curwin->w_width - curwin_col_off();
	int	width2 = width1 + curwin_col_off2();
	int	virtcol;

	validate_virtcol();
	virtcol = curwin->w_virtcol
#ifdef FEAT_PROP_POPUP
	    - curwin->w_virtcol_first_char
#endif
	    ;
	i = 0;
	if (virtcol >= (colnr_T)width1 && width2 > 0)
	    i = (virtcol - width1) / width2 * width2 + width1;
    }
    else
	i = curwin->w_leftcol;
    // Go to the middle of the screen line.  When 'number' or
    // 'relativenumber' is on and lines are wrapping the middle can be more
    // to the left.
    if (cap->nchar == 'm')
	i += (curwin->w_width - curwin_col_off()
		+ ((curwin->w_p_wrap && i > 0)
		    ? curwin_col_off2() : 0)) / 2;
    coladvance((colnr_T)i);
    if (flag)
    {
	do
	    i = gchar_cursor();
	while (VIM_ISWHITE(i) && oneright() == OK);
	curwin->w_valid &= ~VALID_WCOL;
    }
    curwin->w_set_curswant = TRUE;
}

/*
 * "g_": to the last non-blank character in the line or <count> lines
 *       downward.
 */
    static void
nv_g_underscore_cmd(cmdarg_T *cap)
{
    char_u  *ptr;

    cap->oap->motion_type = MCHAR;
    cap->oap->inclusive = TRUE;
    curwin->w_curswant = MAXCOL;
    if (cursor_down((long)(cap->count1 - 1),
					cap->oap->op_type == OP_NOP) == FAIL)
    {
	clearopbeep(cap->oap);
	return;
    }

    ptr = ml_get_curline();

    // In Visual mode we may end up after the line.
    if (curwin->w_cursor.col > 0 && ptr[curwin->w_cursor.col] == NUL)
	--curwin->w_cursor.col;

    // Decrease the cursor column until it's on a non-blank.
    while (curwin->w_cursor.col > 0
	    && VIM_ISWHITE(ptr[curwin->w_cursor.col]))
	--curwin->w_cursor.col;
    curwin->w_set_curswant = TRUE;
    adjust_for_sel(cap);
}

/*
 * "g$" : Like "$" but for screen lines.
 */
    static void
nv_g_dollar_cmd(cmdarg_T *cap)
{
    oparg_T	*oap = cap->oap;
    int		i;
    int		col_off = curwin_col_off();

    oap->motion_type = MCHAR;
    oap->inclusive = TRUE;
    if (curwin->w_p_wrap && curwin->w_width != 0)
    {
	curwin->w_curswant = MAXCOL;    // so we stay at the end
	if (cap->count1 == 1)
	{
	    int		width1 = curwin->w_width - col_off;
	    int		width2 = width1 + curwin_col_off2();
	    int		virtcol;

	    validate_virtcol();
	    virtcol = curwin->w_virtcol
#ifdef FEAT_PROP_POPUP
		- curwin->w_virtcol_first_char
#endif
		;
	    i = width1 - 1;
	    if (virtcol >= (colnr_T)width1)
		i += ((virtcol - width1) / width2 + 1)
		    * width2;
	    coladvance((colnr_T)i);

	    // Make sure we stick in this column.
	    update_curswant_force();
	    if (curwin->w_cursor.col > 0 && curwin->w_p_wrap)
	    {
		// Check for landing on a character that got split at
		// the end of the line.  We do not want to advance to
		// the next screen line.
		if (curwin->w_virtcol
#ifdef FEAT_PROP_POPUP
			- curwin->w_virtcol_first_char
#endif
						> (colnr_T)i)
		    --curwin->w_cursor.col;
	    }
	}
	else if (nv_screengo(oap, FORWARD, cap->count1 - 1) == FAIL)
	    clearopbeep(oap);
    }
    else
    {
	if (cap->count1 > 1)
	    // if it fails, let the cursor still move to the last char
	    (void)cursor_down(cap->count1 - 1, FALSE);

	i = curwin->w_leftcol + curwin->w_width - col_off - 1;
	coladvance((colnr_T)i);

	// if the character doesn't fit move one back
	if (curwin->w_cursor.col > 0
		&& (*mb_ptr2cells)(ml_get_cursor()) > 1)
	{
	    colnr_T vcol;

	    getvvcol(curwin, &curwin->w_cursor, NULL, NULL, &vcol);
	    if (vcol >= curwin->w_leftcol + curwin->w_width - col_off)
		--curwin->w_cursor.col;
	}

	// Make sure we stick in this column.
	update_curswant_force();
    }
}

/*
 * "gi": start Insert at the last position.
 */
    static void
nv_gi_cmd(cmdarg_T *cap)
{
    int		i;

    if (curbuf->b_last_insert.lnum != 0)
    {
	curwin->w_cursor = curbuf->b_last_insert;
	check_cursor_lnum();
	i = (int)STRLEN(ml_get_curline());
	if (curwin->w_cursor.col > (colnr_T)i)
	{
	    if (virtual_active())
		curwin->w_cursor.coladd += curwin->w_cursor.col - i;
	    curwin->w_cursor.col = i;
	}
    }
    cap->cmdchar = 'i';
    nv_edit(cap);
}

/*
 * Commands starting with "g".
 */
    static void
nv_g_cmd(cmdarg_T *cap)
{
    oparg_T	*oap = cap->oap;
    int		i;

    switch (cap->nchar)
    {
    case Ctrl_A:
    case Ctrl_X:
#ifdef MEM_PROFILE
    // "g^A": dump log of used memory.
	if (!VIsual_active && cap->nchar == Ctrl_A)
	    vim_mem_profile_dump();
	else
#endif
    // "g^A/g^X": sequentially increment visually selected region
	     if (VIsual_active)
	{
	    cap->arg = TRUE;
	    cap->cmdchar = cap->nchar;
	    cap->nchar = NUL;
	    nv_addsub(cap);
	}
	else
	    clearopbeep(oap);
	break;

    // "gR": Enter virtual replace mode.
    case 'R':
	cap->arg = TRUE;
	nv_Replace(cap);
	break;

    case 'r':
	nv_vreplace(cap);
	break;

    case '&':
	do_cmdline_cmd((char_u *)"%s//~/&");
	break;

    // "gv": Reselect the previous Visual area.  If Visual already active,
    // exchange previous and current Visual area.
    case 'v':
	nv_gv_cmd(cap);
	break;

    // "gV": Don't reselect the previous Visual area after a Select mode
    // mapping of menu.
    case 'V':
	VIsual_reselect = FALSE;
	break;

    // "gh":  start Select mode.
    // "gH":  start Select line mode.
    // "g^H": start Select block mode.
    case K_BS:
	cap->nchar = Ctrl_H;
	// FALLTHROUGH
    case 'h':
    case 'H':
    case Ctrl_H:
	cap->cmdchar = cap->nchar + ('v' - 'h');
	cap->arg = TRUE;
	nv_visual(cap);
	break;

    // "gn", "gN" visually select next/previous search match
    // "gn" selects next match
    // "gN" selects previous match
    case 'N':
    case 'n':
	if (!current_search(cap->count1, cap->nchar == 'n'))
	    clearopbeep(oap);
	break;

    // "gj" and "gk" two new funny movement keys -- up and down
    // movement based on *screen* line rather than *file* line.
    case 'j':
    case K_DOWN:
	// with 'nowrap' it works just like the normal "j" command.
	if (!curwin->w_p_wrap)
	{
	    oap->motion_type = MLINE;
	    i = cursor_down(cap->count1, oap->op_type == OP_NOP);
	}
	else
	    i = nv_screengo(oap, FORWARD, cap->count1);
	if (i == FAIL)
	    clearopbeep(oap);
	break;

    case 'k':
    case K_UP:
	// with 'nowrap' it works just like the normal "k" command.
	if (!curwin->w_p_wrap)
	{
	    oap->motion_type = MLINE;
	    i = cursor_up(cap->count1, oap->op_type == OP_NOP);
	}
	else
	    i = nv_screengo(oap, BACKWARD, cap->count1);
	if (i == FAIL)
	    clearopbeep(oap);
	break;

    // "gJ": join two lines without inserting a space.
    case 'J':
	nv_join(cap);
	break;

    // "g0", "g^" : Like "0" and "^" but for screen lines.
    // "gm": middle of "g0" and "g$".
    case '^':
    case '0':
    case 'm':
    case K_HOME:
    case K_KHOME:
	nv_g_home_m_cmd(cap);
	break;

    case 'M':
	{
	    oap->motion_type = MCHAR;
	    oap->inclusive = FALSE;
	    i = linetabsize_str(ml_get_curline());
	    if (cap->count0 > 0 && cap->count0 <= 100)
		coladvance((colnr_T)(i * cap->count0 / 100));
	    else
		coladvance((colnr_T)(i / 2));
	    curwin->w_set_curswant = TRUE;
	}
	break;

    // "g_": to the last non-blank character in the line or <count> lines
    // downward.
    case '_':
	nv_g_underscore_cmd(cap);
	break;

    // "g$" : Like "$" but for screen lines.
    case '$':
    case K_END:
    case K_KEND:
	nv_g_dollar_cmd(cap);
	break;

    // "g*" and "g#", like "*" and "#" but without using "\<" and "\>"
    case '*':
    case '#':
#if POUND != '#'
    case POUND:		// pound sign (sometimes equal to '#')
#endif
    case Ctrl_RSB:		// :tag or :tselect for current identifier
    case ']':			// :tselect for current identifier
	nv_ident(cap);
	break;

    // ge and gE: go back to end of word
    case 'e':
    case 'E':
	oap->motion_type = MCHAR;
	curwin->w_set_curswant = TRUE;
	oap->inclusive = TRUE;
	if (bckend_word(cap->count1, cap->nchar == 'E', FALSE) == FAIL)
	    clearopbeep(oap);
	break;

    // "g CTRL-G": display info about cursor position
    case Ctrl_G:
	cursor_pos_info(NULL);
	break;

    // "gi": start Insert at the last position.
    case 'i':
	nv_gi_cmd(cap);
	break;

    // "gI": Start insert in column 1.
    case 'I':
	beginline(0);
	if (!checkclearopq(oap))
	    invoke_edit(cap, FALSE, 'g', FALSE);
	break;

    // "gf": goto file, edit file under cursor
    // "]f" and "[f": can also be used.
    case 'f':
    case 'F':
	nv_gotofile(cap);
	break;

    // "g'm" and "g`m": jump to mark without setting pcmark
    case '\'':
	cap->arg = TRUE;
	// FALLTHROUGH
    case '`':
	nv_gomark(cap);
	break;

    // "gs": Goto sleep.
    case 's':
	do_sleep(cap->count1 * 1000L, FALSE);
	break;

    // "ga": Display the ascii value of the character under the
    // cursor.	It is displayed in decimal, hex, and octal. -- webb
    case 'a':
	do_ascii(NULL);
	break;

    // "g8": Display the bytes used for the UTF-8 character under the
    // cursor.	It is displayed in hex.
    // "8g8" finds illegal byte sequence.
    case '8':
	if (cap->count0 == 8)
	    utf_find_illegal();
	else
	    show_utf8();
	break;

    // "g<": show scrollback text
    case '<':
	show_sb_text();
	break;

    // "gg": Goto the first line in file.  With a count it goes to
    // that line number like for "G". -- webb
    case 'g':
	cap->arg = FALSE;
	nv_goto(cap);
	break;

    //	 Two-character operators:
    //	 "gq"	    Format text
    //	 "gw"	    Format text and keep cursor position
    //	 "g~"	    Toggle the case of the text.
    //	 "gu"	    Change text to lower case.
    //	 "gU"	    Change text to upper case.
    //   "g?"	    rot13 encoding
    //   "g@"	    call 'operatorfunc'
    case 'q':
    case 'w':
	oap->cursor_start = curwin->w_cursor;
	// FALLTHROUGH
    case '~':
    case 'u':
    case 'U':
    case '?':
    case '@':
	nv_operator(cap);
	break;

    // "gd": Find first occurrence of pattern under the cursor in the
    //	 current function
    // "gD": idem, but in the current file.
    case 'd':
    case 'D':
	nv_gd(oap, cap->nchar, (int)cap->count0);
	break;

    // g<*Mouse> : <C-*mouse>
    case K_MIDDLEMOUSE:
    case K_MIDDLEDRAG:
    case K_MIDDLERELEASE:
    case K_LEFTMOUSE:
    case K_LEFTDRAG:
    case K_LEFTRELEASE:
    case K_MOUSEMOVE:
    case K_RIGHTMOUSE:
    case K_RIGHTDRAG:
    case K_RIGHTRELEASE:
    case K_X1MOUSE:
    case K_X1DRAG:
    case K_X1RELEASE:
    case K_X2MOUSE:
    case K_X2DRAG:
    case K_X2RELEASE:
	mod_mask = MOD_MASK_CTRL;
	(void)do_mouse(oap, cap->nchar, BACKWARD, cap->count1, 0);
	break;

    case K_IGNORE:
	break;

    // "gP" and "gp": same as "P" and "p" but leave cursor just after new text
    case 'p':
    case 'P':
	nv_put(cap);
	break;

#ifdef FEAT_BYTEOFF
    // "go": goto byte count from start of buffer
    case 'o':
	goto_byte(cap->count0);
	break;
#endif

    // "gQ": improved Ex mode
    case 'Q':
	if (!check_text_locked(cap->oap) && !checkclearopq(oap))
	    do_exmode(TRUE);
	break;

    case ',':
	nv_pcmark(cap);
	break;

    case ';':
	cap->count1 = -cap->count1;
	nv_pcmark(cap);
	break;

    case 't':
	if (!checkclearop(oap))
	    goto_tabpage((int)cap->count0);
	break;
    case 'T':
	if (!checkclearop(oap))
	    goto_tabpage(-(int)cap->count1);
	break;

    case TAB:
	if (!checkclearop(oap) && goto_tabpage_lastused() == FAIL)
	    clearopbeep(oap);
	break;

    case '+':
    case '-': // "g+" and "g-": undo or redo along the timeline
	if (!checkclearopq(oap))
	    undo_time(cap->nchar == '-' ? -cap->count1 : cap->count1,
							 FALSE, FALSE, FALSE);
	break;

    default:
	clearopbeep(oap);
	break;
    }
}

/*
 * Handle "o" and "O" commands.
 */
    static void
n_opencmd(cmdarg_T *cap)
{
#ifdef FEAT_CONCEAL
    linenr_T	oldline = curwin->w_cursor.lnum;
#endif

    if (checkclearopq(cap->oap))
	return;

#ifdef FEAT_FOLDING
    if (cap->cmdchar == 'O')
	// Open above the first line of a folded sequence of lines
	(void)hasFolding(curwin->w_cursor.lnum,
		&curwin->w_cursor.lnum, NULL);
    else
	// Open below the last line of a folded sequence of lines
	(void)hasFolding(curwin->w_cursor.lnum,
		NULL, &curwin->w_cursor.lnum);
#endif
    if (u_save((linenr_T)(curwin->w_cursor.lnum -
		    (cap->cmdchar == 'O' ? 1 : 0)),
		(linenr_T)(curwin->w_cursor.lnum +
		    (cap->cmdchar == 'o' ? 1 : 0))
	      ) == OK
	    && open_line(cap->cmdchar == 'O' ? BACKWARD : FORWARD,
		has_format_option(FO_OPEN_COMS) ? OPENLINE_DO_COM : 0,
		0, NULL) == OK)
    {
#ifdef FEAT_CONCEAL
	if (curwin->w_p_cole > 0 && oldline != curwin->w_cursor.lnum)
	    redrawWinline(curwin, oldline);
#endif
#ifdef FEAT_SYN_HL
	if (curwin->w_p_cul)
	    // force redraw of cursorline
	    curwin->w_valid &= ~VALID_CROW;
#endif
	// When '#' is in 'cpoptions' ignore the count.
	if (vim_strchr(p_cpo, CPO_HASH) != NULL)
	    cap->count1 = 1;
	invoke_edit(cap, FALSE, cap->cmdchar, TRUE);
    }
}

/*
 * "." command: redo last change.
 */
    static void
nv_dot(cmdarg_T *cap)
{
    if (checkclearopq(cap->oap))
	return;

    // If "restart_edit" is TRUE, the last but one command is repeated
    // instead of the last command (inserting text). This is used for
    // CTRL-O <.> in insert mode.
    if (start_redo(cap->count0, restart_edit != 0 && !arrow_used) == FAIL)
	clearopbeep(cap->oap);
}

/*
 * CTRL-R: undo undo or specify register in select mode
 */
    static void
nv_redo_or_register(cmdarg_T *cap)
{
    if (VIsual_select && VIsual_active)
    {
	int reg;
	// Get register name
	++no_mapping;
	++allow_keys;
	reg = plain_vgetc();
	LANGMAP_ADJUST(reg, TRUE);
	--no_mapping;
	--allow_keys;

	if (reg == '"')
	    // the unnamed register is 0
	    reg = 0;

	VIsual_select_reg = valid_yank_reg(reg, TRUE) ? reg : 0;
	return;
    }

    if (checkclearopq(cap->oap))
	return;

    u_redo((int)cap->count1);
    curwin->w_set_curswant = TRUE;
}

/*
 * Handle "U" command.
 */
    static void
nv_Undo(cmdarg_T *cap)
{
    // In Visual mode and typing "gUU" triggers an operator
    if (cap->oap->op_type == OP_UPPER || VIsual_active)
    {
	// translate "gUU" to "gUgU"
	cap->cmdchar = 'g';
	cap->nchar = 'U';
	nv_operator(cap);
	return;
    }

    if (checkclearopq(cap->oap))
	return;

    u_undoline();
    curwin->w_set_curswant = TRUE;
}

/*
 * '~' command: If tilde is not an operator and Visual is off: swap case of a
 * single character.
 */
    static void
nv_tilde(cmdarg_T *cap)
{
    if (!p_to && !VIsual_active && cap->oap->op_type != OP_TILDE)
    {
#ifdef FEAT_JOB_CHANNEL
	if (bt_prompt(curbuf) && !prompt_curpos_editable())
	{
	    clearopbeep(cap->oap);
	    return;
	}
#endif
	n_swapchar(cap);
    }
    else
	nv_operator(cap);
}

/*
 * Handle an operator command.
 * The actual work is done by do_pending_operator().
 */
    static void
nv_operator(cmdarg_T *cap)
{
    int	    op_type;

    op_type = get_op_type(cap->cmdchar, cap->nchar);
#ifdef FEAT_JOB_CHANNEL
    if (bt_prompt(curbuf) && op_is_change(op_type) && !prompt_curpos_editable())
    {
	clearopbeep(cap->oap);
	return;
    }
#endif

    if (op_type == cap->oap->op_type)	    // double operator works on lines
	nv_lineop(cap);
    else if (!checkclearop(cap->oap))
    {
	cap->oap->start = curwin->w_cursor;
	cap->oap->op_type = op_type;
#ifdef FEAT_EVAL
	set_op_var(op_type);
#endif
    }
}

#ifdef FEAT_EVAL
/*
 * Set v:operator to the characters for "optype".
 */
    static void
set_op_var(int optype)
{
    char_u	opchars[3];

    if (optype == OP_NOP)
	set_vim_var_string(VV_OP, NULL, 0);
    else
    {
	opchars[0] = get_op_char(optype);
	opchars[1] = get_extra_op_char(optype);
	opchars[2] = NUL;
	set_vim_var_string(VV_OP, opchars, -1);
    }
}
#endif

/*
 * Handle linewise operator "dd", "yy", etc.
 *
 * "_" is is a strange motion command that helps make operators more logical.
 * It is actually implemented, but not documented in the real Vi.  This motion
 * command actually refers to "the current line".  Commands like "dd" and "yy"
 * are really an alternate form of "d_" and "y_".  It does accept a count, so
 * "d3_" works to delete 3 lines.
 */
    static void
nv_lineop(cmdarg_T *cap)
{
    cap->oap->motion_type = MLINE;
    if (cursor_down(cap->count1 - 1L, cap->oap->op_type == OP_NOP) == FAIL)
	clearopbeep(cap->oap);
    else if (  (cap->oap->op_type == OP_DELETE // only with linewise motions
		&& cap->oap->motion_force != 'v'
		&& cap->oap->motion_force != Ctrl_V)
	    || cap->oap->op_type == OP_LSHIFT
	    || cap->oap->op_type == OP_RSHIFT)
	beginline(BL_SOL | BL_FIX);
    else if (cap->oap->op_type != OP_YANK)	// 'Y' does not move cursor
	beginline(BL_WHITE | BL_FIX);
}

/*
 * <Home> command.
 */
    static void
nv_home(cmdarg_T *cap)
{
    // CTRL-HOME is like "gg"
    if (mod_mask & MOD_MASK_CTRL)
	nv_goto(cap);
    else
    {
	cap->count0 = 1;
	nv_pipe(cap);
    }
    ins_at_eol = FALSE;	    // Don't move cursor past eol (only necessary in a
			    // one-character line).
}

/*
 * "|" command.
 */
    static void
nv_pipe(cmdarg_T *cap)
{
    cap->oap->motion_type = MCHAR;
    cap->oap->inclusive = FALSE;
    beginline(0);
    if (cap->count0 > 0)
    {
	coladvance((colnr_T)(cap->count0 - 1));
	curwin->w_curswant = (colnr_T)(cap->count0 - 1);
    }
    else
	curwin->w_curswant = 0;
    // keep curswant at the column where we wanted to go, not where
    // we ended; differs if line is too short
    curwin->w_set_curswant = FALSE;
}

/*
 * Handle back-word command "b" and "B".
 * cap->arg is 1 for "B"
 */
    static void
nv_bck_word(cmdarg_T *cap)
{
    cap->oap->motion_type = MCHAR;
    cap->oap->inclusive = FALSE;
    curwin->w_set_curswant = TRUE;
    if (bck_word(cap->count1, cap->arg, FALSE) == FAIL)
	clearopbeep(cap->oap);
#ifdef FEAT_FOLDING
    else if ((fdo_flags & FDO_HOR) && KeyTyped && cap->oap->op_type == OP_NOP)
	foldOpenCursor();
#endif
}

/*
 * Handle word motion commands "e", "E", "w" and "W".
 * cap->arg is TRUE for "E" and "W".
 */
    static void
nv_wordcmd(cmdarg_T *cap)
{
    int		n;
    int		word_end;
    int		flag = FALSE;
    pos_T	startpos = curwin->w_cursor;

    // Set inclusive for the "E" and "e" command.
    if (cap->cmdchar == 'e' || cap->cmdchar == 'E')
	word_end = TRUE;
    else
	word_end = FALSE;
    cap->oap->inclusive = word_end;

    // "cw" and "cW" are a special case.
    if (!word_end && cap->oap->op_type == OP_CHANGE)
    {
	n = gchar_cursor();
	if (n != NUL)			// not an empty line
	{
	    if (VIM_ISWHITE(n))
	    {
		// Reproduce a funny Vi behaviour: "cw" on a blank only
		// changes one character, not all blanks until the start of
		// the next word.  Only do this when the 'w' flag is included
		// in 'cpoptions'.
		if (cap->count1 == 1 && vim_strchr(p_cpo, CPO_CW) != NULL)
		{
		    cap->oap->inclusive = TRUE;
		    cap->oap->motion_type = MCHAR;
		    return;
		}
	    }
	    else
	    {
		// This is a little strange. To match what the real Vi does,
		// we effectively map 'cw' to 'ce', and 'cW' to 'cE', provided
		// that we are not on a space or a TAB.  This seems impolite
		// at first, but it's really more what we mean when we say
		// 'cw'.
		// Another strangeness: When standing on the end of a word
		// "ce" will change until the end of the next word, but "cw"
		// will change only one character! This is done by setting
		// flag.
		cap->oap->inclusive = TRUE;
		word_end = TRUE;
		flag = TRUE;
	    }
	}
    }

    cap->oap->motion_type = MCHAR;
    curwin->w_set_curswant = TRUE;
    if (word_end)
	n = end_word(cap->count1, cap->arg, flag, FALSE);
    else
	n = fwd_word(cap->count1, cap->arg, cap->oap->op_type != OP_NOP);

    // Don't leave the cursor on the NUL past the end of line. Unless we
    // didn't move it forward.
    if (LT_POS(startpos, curwin->w_cursor))
	adjust_cursor(cap->oap);

    if (n == FAIL && cap->oap->op_type == OP_NOP)
	clearopbeep(cap->oap);
    else
    {
	adjust_for_sel(cap);
#ifdef FEAT_FOLDING
	if ((fdo_flags & FDO_HOR) && KeyTyped && cap->oap->op_type == OP_NOP)
	    foldOpenCursor();
#endif
    }
}

/*
 * Used after a movement command: If the cursor ends up on the NUL after the
 * end of the line, may move it back to the last character and make the motion
 * inclusive.
 */
    static void
adjust_cursor(oparg_T *oap)
{
    // The cursor cannot remain on the NUL when:
    // - the column is > 0
    // - not in Visual mode or 'selection' is "o"
    // - 'virtualedit' is not "all" and not "onemore".
    if (curwin->w_cursor.col > 0 && gchar_cursor() == NUL
		&& (!VIsual_active || *p_sel == 'o')
		&& !virtual_active() && (get_ve_flags() & VE_ONEMORE) == 0)
    {
	--curwin->w_cursor.col;
	// prevent cursor from moving on the trail byte
	if (has_mbyte)
	    mb_adjust_cursor();
	oap->inclusive = TRUE;
    }
}

/*
 * "0" and "^" commands.
 * cap->arg is the argument for beginline().
 */
    static void
nv_beginline(cmdarg_T *cap)
{
    cap->oap->motion_type = MCHAR;
    cap->oap->inclusive = FALSE;
    beginline(cap->arg);
#ifdef FEAT_FOLDING
    if ((fdo_flags & FDO_HOR) && KeyTyped && cap->oap->op_type == OP_NOP)
	foldOpenCursor();
#endif
    ins_at_eol = FALSE;	    // Don't move cursor past eol (only necessary in a
			    // one-character line).
}

/*
 * In exclusive Visual mode, may include the last character.
 */
    static void
adjust_for_sel(cmdarg_T *cap)
{
    if (VIsual_active && cap->oap->inclusive && *p_sel == 'e'
	    && gchar_cursor() != NUL && LT_POS(VIsual, curwin->w_cursor))
    {
	if (has_mbyte)
	    inc_cursor();
	else
	    ++curwin->w_cursor.col;
	cap->oap->inclusive = FALSE;
    }
}

/*
 * Exclude last character at end of Visual area for 'selection' == "exclusive".
 * Should check VIsual_mode before calling this.
 * Returns TRUE when backed up to the previous line.
 */
    int
unadjust_for_sel(void)
{
    pos_T	*pp;

    if (*p_sel == 'e' && !EQUAL_POS(VIsual, curwin->w_cursor))
    {
	if (LT_POS(VIsual, curwin->w_cursor))
	    pp = &curwin->w_cursor;
	else
	    pp = &VIsual;
	if (pp->coladd > 0)
	    --pp->coladd;
	else
	if (pp->col > 0)
	{
	    --pp->col;
	    mb_adjustpos(curbuf, pp);
	}
	else if (pp->lnum > 1)
	{
	    --pp->lnum;
	    pp->col = (colnr_T)STRLEN(ml_get(pp->lnum));
	    return TRUE;
	}
    }
    return FALSE;
}

/*
 * SELECT key in Normal or Visual mode: end of Select mode mapping.
 */
    static void
nv_select(cmdarg_T *cap)
{
    if (VIsual_active)
    {
	VIsual_select = TRUE;
	VIsual_select_reg = 0;
    }
    else if (VIsual_reselect)
    {
	cap->nchar = 'v';	    // fake "gv" command
	cap->arg = TRUE;
	nv_g_cmd(cap);
    }
}


/*
 * "G", "gg", CTRL-END, CTRL-HOME.
 * cap->arg is TRUE for "G".
 */
    static void
nv_goto(cmdarg_T *cap)
{
    linenr_T	lnum;

    if (cap->arg)
	lnum = curbuf->b_ml.ml_line_count;
    else
	lnum = 1L;
    cap->oap->motion_type = MLINE;
    setpcmark();

    // When a count is given, use it instead of the default lnum
    if (cap->count0 != 0)
	lnum = cap->count0;
    if (lnum < 1L)
	lnum = 1L;
    else if (lnum > curbuf->b_ml.ml_line_count)
	lnum = curbuf->b_ml.ml_line_count;
    curwin->w_cursor.lnum = lnum;
    beginline(BL_SOL | BL_FIX);
#ifdef FEAT_FOLDING
    if ((fdo_flags & FDO_JUMP) && KeyTyped && cap->oap->op_type == OP_NOP)
	foldOpenCursor();
#endif
}

/*
 * CTRL-\ in Normal mode.
 */
    static void
nv_normal(cmdarg_T *cap)
{
    if (cap->nchar == Ctrl_N || cap->nchar == Ctrl_G)
    {
	clearop(cap->oap);
	if (restart_edit != 0 && mode_displayed)
	    clear_cmdline = TRUE;		// unshow mode later
	restart_edit = 0;
	if (cmdwin_type != 0)
	    cmdwin_result = Ctrl_C;
	if (VIsual_active)
	{
	    end_visual_mode();		// stop Visual
	    redraw_curbuf_later(UPD_INVERTED);
	}
	// CTRL-\ CTRL-G restarts Insert mode when 'insertmode' is set.
	if (cap->nchar == Ctrl_G && p_im)
	    restart_edit = 'a';
    }
    else
	clearopbeep(cap->oap);
}

/*
 * ESC in Normal mode: beep, but don't flush buffers.
 * Don't even beep if we are canceling a command.
 */
    static void
nv_esc(cmdarg_T *cap)
{
    int		no_reason;

    no_reason = (cap->oap->op_type == OP_NOP
		&& cap->opcount == 0
		&& cap->count0 == 0
		&& cap->oap->regname == 0
		&& !p_im);

    if (cap->arg)		// TRUE for CTRL-C
    {
	if (restart_edit == 0 && cmdwin_type == 0
						&& !VIsual_active && no_reason)
	{
	    int	out_redir = !stdout_isatty && !is_not_a_term_or_gui();

	    // The user may accidentally do "vim file | grep word" and then
	    // CTRL-C doesn't show anything.  With a changed buffer give the
	    // message on stderr.  Without any changes might as well exit.
	    if (anyBufIsChanged())
	    {
		char *ms = _("Type  :qa!  and press <Enter> to abandon all changes and exit Vim");

		if (out_redir)
		    mch_errmsg(ms);
		else
		    msg(ms);
	    }
	    else
	    {
		if (out_redir)
		{
		    got_int = FALSE;
		    do_cmdline_cmd((char_u *)"qa");
		}
		else
		    msg(_("Type  :qa  and press <Enter> to exit Vim"));
	    }
	}

	if (restart_edit != 0)
	    redraw_mode = TRUE;  // remove "-- (insert) --"

	// Don't reset "restart_edit" when 'insertmode' is set, it won't be
	// set again below when halfway a mapping.
	if (!p_im)
	    restart_edit = 0;
	if (cmdwin_type != 0)
	{
	    cmdwin_result = K_IGNORE;
	    got_int = FALSE;	// don't stop executing autocommands et al.
	    return;
	}
    }
    else if (cmdwin_type != 0 && ex_normal_busy && typebuf_was_empty)
    {
	// When :normal runs out of characters while in the command line window
	// vgetorpeek() will repeatedly return ESC.  Exit the cmdline window to
	// break the loop.
	cmdwin_result = K_IGNORE;
	return;
    }

    if (VIsual_active)
    {
	end_visual_mode();	// stop Visual
	check_cursor_col();	// make sure cursor is not beyond EOL
	curwin->w_set_curswant = TRUE;
	redraw_curbuf_later(UPD_INVERTED);
    }
    else if (no_reason)
    {
#ifdef HAS_MESSAGE_WINDOW
	if (!cap->arg && popup_message_win_visible())
	    popup_hide_message_win();
	else
#endif
	    vim_beep(BO_ESC);
    }
    clearop(cap->oap);

    // A CTRL-C is often used at the start of a menu.  When 'insertmode' is
    // set return to Insert mode afterwards.
    if (restart_edit == 0 && goto_im() && ex_normal_busy == 0)
	restart_edit = 'a';
}

/*
 * Move the cursor for the "A" command.
 */
    void
set_cursor_for_append_to_line(void)
{
    curwin->w_set_curswant = TRUE;
    if (get_ve_flags() == VE_ALL)
    {
	int save_State = State;

	// Pretend Insert mode here to allow the cursor on the
	// character past the end of the line
	State = MODE_INSERT;
	coladvance((colnr_T)MAXCOL);
	State = save_State;
    }
    else
	curwin->w_cursor.col += (colnr_T)STRLEN(ml_get_cursor());
}

/*
 * Handle "A", "a", "I", "i" and <Insert> commands.
 * Also handle K_PS, start bracketed paste.
 */
    static void
nv_edit(cmdarg_T *cap)
{
    // <Insert> is equal to "i"
    if (cap->cmdchar == K_INS || cap->cmdchar == K_KINS)
	cap->cmdchar = 'i';

    // in Visual mode "A" and "I" are an operator
    if (VIsual_active && (cap->cmdchar == 'A' || cap->cmdchar == 'I'))
    {
#ifdef FEAT_TERMINAL
	if (term_in_normal_mode())
	{
	    end_visual_mode();
	    clearop(cap->oap);
	    term_enter_job_mode();
	    return;
	}
#endif
	v_visop(cap);
    }

    // in Visual mode and after an operator "a" and "i" are for text objects
    else if ((cap->cmdchar == 'a' || cap->cmdchar == 'i')
	    && (cap->oap->op_type != OP_NOP || VIsual_active))
    {
	nv_object(cap);
    }
#ifdef FEAT_TERMINAL
    else if (term_in_normal_mode())
    {
	clearop(cap->oap);
	term_enter_job_mode();
	return;
    }
#endif
    else if (!curbuf->b_p_ma && !p_im)
    {
	// Only give this error when 'insertmode' is off.
	emsg(_(e_cannot_make_changes_modifiable_is_off));
	clearop(cap->oap);
	if (cap->cmdchar == K_PS)
	    // drop the pasted text
	    bracketed_paste(PASTE_INSERT, TRUE, NULL);
    }
    else if (cap->cmdchar == K_PS && VIsual_active)
    {
	pos_T old_pos = curwin->w_cursor;
	pos_T old_visual = VIsual;
	int old_visual_mode = VIsual_mode;

	// In Visual mode the selected text is deleted.
	if (VIsual_mode == 'V' || curwin->w_cursor.lnum != VIsual.lnum)
	{
	    shift_delete_registers();
	    cap->oap->regname = '1';
	}
	else
	    cap->oap->regname = '-';
	cap->cmdchar = 'd';
	cap->nchar = NUL;
	nv_operator(cap);
	do_pending_operator(cap, 0, FALSE);
	cap->cmdchar = K_PS;

	if (*ml_get_cursor() != NUL)
	{
	    if (old_visual_mode == 'V')
	    {
		// In linewise Visual mode insert before the beginning of the
		// next line.
		// When the last line in the buffer was deleted then create a
		// new line, otherwise there is not need to move cursor.
		// Detect this by checking if cursor moved above Visual area.
		if (curwin->w_cursor.lnum < old_pos.lnum
				&& curwin->w_cursor.lnum < old_visual.lnum)
		{
		    if (u_save_cursor() == OK)
		    {
			ml_append(curwin->w_cursor.lnum, (char_u *)"", 0,
									FALSE);
			appended_lines(curwin->w_cursor.lnum++, 1L);
		    }
		}
	    }
	    // When the last char in the line was deleted then append.
	    // Detect this by checking if cursor moved before Visual area.
	    else if (curwin->w_cursor.col < old_pos.col
				&& curwin->w_cursor.col < old_visual.col)
		inc_cursor();
	}

	// Insert to replace the deleted text with the pasted text.
	invoke_edit(cap, FALSE, cap->cmdchar, FALSE);
    }
    else if (!checkclearopq(cap->oap))
    {
	switch (cap->cmdchar)
	{
	    case 'A':	// "A"ppend after the line
		set_cursor_for_append_to_line();
		break;

	    case 'I':	// "I"nsert before the first non-blank
		if (vim_strchr(p_cpo, CPO_INSEND) == NULL)
		    beginline(BL_WHITE);
		else
		    beginline(BL_WHITE|BL_FIX);
		break;

	    case K_PS:
		// Bracketed paste works like "a"ppend, unless the cursor is in
		// the first column, then it inserts.
		if (curwin->w_cursor.col == 0)
		    break;
		// FALLTHROUGH

	    case 'a':	// "a"ppend is like "i"nsert on the next character.
		// increment coladd when in virtual space, increment the
		// column otherwise, also to append after an unprintable char
		if (virtual_active()
			&& (curwin->w_cursor.coladd > 0
			    || *ml_get_cursor() == NUL
			    || *ml_get_cursor() == TAB))
		    curwin->w_cursor.coladd++;
		else if (*ml_get_cursor() != NUL)
		    inc_cursor();
		break;
	}

	if (curwin->w_cursor.coladd && cap->cmdchar != 'A')
	{
	    int save_State = State;

	    // Pretend Insert mode here to allow the cursor on the
	    // character past the end of the line
	    State = MODE_INSERT;
	    coladvance(getviscol());
	    State = save_State;
	}

	invoke_edit(cap, FALSE, cap->cmdchar, FALSE);
    }
    else if (cap->cmdchar == K_PS)
	// drop the pasted text
	bracketed_paste(PASTE_INSERT, TRUE, NULL);
}

/*
 * Invoke edit() and take care of "restart_edit" and the return value.
 */
    static void
invoke_edit(
    cmdarg_T	*cap,
    int		repl,		// "r" or "gr" command
    int		cmd,
    int		startln)
{
    int		restart_edit_save = 0;

    // Complicated: When the user types "a<C-O>a" we don't want to do Insert
    // mode recursively.  But when doing "a<C-O>." or "a<C-O>rx" we do allow
    // it.
    if (repl || !stuff_empty())
	restart_edit_save = restart_edit;
    else
	restart_edit_save = 0;

    // Always reset "restart_edit", this is not a restarted edit.
    restart_edit = 0;

    if (edit(cmd, startln, cap->count1))
	cap->retval |= CA_COMMAND_BUSY;

    if (restart_edit == 0)
	restart_edit = restart_edit_save;
}

/*
 * "a" or "i" while an operator is pending or in Visual mode: object motion.
 */
    static void
nv_object(
    cmdarg_T	*cap)
{
    int		flag;
    int		include;
    char_u	*mps_save;

    if (cap->cmdchar == 'i')
	include = FALSE;    // "ix" = inner object: exclude white space
    else
	include = TRUE;	    // "ax" = an object: include white space

    // Make sure (), [], {} and <> are in 'matchpairs'
    mps_save = curbuf->b_p_mps;
    curbuf->b_p_mps = (char_u *)"(:),{:},[:],<:>";

    switch (cap->nchar)
    {
	case 'w': // "aw" = a word
		flag = current_word(cap->oap, cap->count1, include, FALSE);
		break;
	case 'W': // "aW" = a WORD
		flag = current_word(cap->oap, cap->count1, include, TRUE);
		break;
	case 'b': // "ab" = a braces block
	case '(':
	case ')':
		flag = current_block(cap->oap, cap->count1, include, '(', ')');
		break;
	case 'B': // "aB" = a Brackets block
	case '{':
	case '}':
		flag = current_block(cap->oap, cap->count1, include, '{', '}');
		break;
	case '[': // "a[" = a [] block
	case ']':
		flag = current_block(cap->oap, cap->count1, include, '[', ']');
		break;
	case '<': // "a<" = a <> block
	case '>':
		flag = current_block(cap->oap, cap->count1, include, '<', '>');
		break;
#ifdef FEAT_EVAL
	case 't': // "at" = a tag block (xml and html)
		// Do not adjust oap->end in do_pending_operator()
		// otherwise there are different results for 'dit'
		// (note leading whitespace in last line):
		// 1) <b>      2) <b>
		//    foobar      foobar
		//    </b>            </b>
		cap->retval |= CA_NO_ADJ_OP_END;
		flag = current_tagblock(cap->oap, cap->count1, include);
		break;
#endif
	case 'p': // "ap" = a paragraph
		flag = current_par(cap->oap, cap->count1, include, 'p');
		break;
	case 's': // "as" = a sentence
		flag = current_sent(cap->oap, cap->count1, include);
		break;
	case '"': // "a"" = a double quoted string
	case '\'': // "a'" = a single quoted string
	case '`': // "a`" = a backtick quoted string
		flag = current_quote(cap->oap, cap->count1, include,
								  cap->nchar);
		break;
#if 0	// TODO
	case 'S': // "aS" = a section
	case 'f': // "af" = a filename
	case 'u': // "au" = a URL
#endif
	default:
		flag = FAIL;
		break;
    }

    curbuf->b_p_mps = mps_save;
    if (flag == FAIL)
	clearopbeep(cap->oap);
    adjust_cursor_col();
    curwin->w_set_curswant = TRUE;
}

/*
 * "q" command: Start/stop recording.
 * "q:", "q/", "q?": edit command-line in command-line window.
 */
    static void
nv_record(cmdarg_T *cap)
{
    if (cap->oap->op_type == OP_FORMAT)
    {
	// "gqq" is the same as "gqgq": format line
	cap->cmdchar = 'g';
	cap->nchar = 'q';
	nv_operator(cap);
	return;
    }

    if (checkclearop(cap->oap))
	return;

    if (cap->nchar == ':' || cap->nchar == '/' || cap->nchar == '?')
    {
	if (cmdwin_type != 0)
	{
	    emsg(_(e_cmdline_window_already_open));
	    return;
	}
	stuffcharReadbuff(cap->nchar);
	stuffcharReadbuff(K_CMDWIN);
    }
    else
	// (stop) recording into a named register, unless executing a
	// register
	if (reg_executing == 0 && do_record(cap->nchar) == FAIL)
	    clearopbeep(cap->oap);
}

/*
 * Handle the "@r" command.
 */
    static void
nv_at(cmdarg_T *cap)
{
    if (checkclearop(cap->oap))
	return;
#ifdef FEAT_EVAL
    if (cap->nchar == '=')
    {
	if (get_expr_register() == NUL)
	    return;
    }
#endif
    while (cap->count1-- && !got_int)
    {
	if (do_execreg(cap->nchar, FALSE, FALSE, FALSE) == FAIL)
	{
	    clearopbeep(cap->oap);
	    break;
	}
	line_breakcheck();
    }
}

/*
 * Handle the CTRL-U and CTRL-D commands.
 */
    static void
nv_halfpage(cmdarg_T *cap)
{
    if ((cap->cmdchar == Ctrl_U && curwin->w_cursor.lnum == 1)
	    || (cap->cmdchar == Ctrl_D
		&& curwin->w_cursor.lnum == curbuf->b_ml.ml_line_count))
	clearopbeep(cap->oap);
    else if (!checkclearop(cap->oap))
	halfpage(cap->cmdchar == Ctrl_D, cap->count0);
}

/*
 * Handle "J" or "gJ" command.
 */
    static void
nv_join(cmdarg_T *cap)
{
    if (VIsual_active)	// join the visual lines
    {
	nv_operator(cap);
	return;
    }

    if (checkclearop(cap->oap))
	return;

    if (cap->count0 <= 1)
	cap->count0 = 2;	    // default for join is two lines!
    if (curwin->w_cursor.lnum + cap->count0 - 1 >
	    curbuf->b_ml.ml_line_count)
    {
	// can't join when on the last line
	if (cap->count0 <= 2)
	{
	    clearopbeep(cap->oap);
	    return;
	}
	cap->count0 = curbuf->b_ml.ml_line_count
	    - curwin->w_cursor.lnum + 1;
    }

    prep_redo(cap->oap->regname, cap->count0,
	    NUL, cap->cmdchar, NUL, NUL, cap->nchar);
    (void)do_join(cap->count0, cap->nchar == NUL, TRUE, TRUE, TRUE);
}

/*
 * "P", "gP", "p" and "gp" commands.
 */
    static void
nv_put(cmdarg_T *cap)
{
    nv_put_opt(cap, FALSE);
}

/*
 * "P", "gP", "p" and "gp" commands.
 * "fix_indent" is TRUE for "[p", "[P", "]p" and "]P".
 */
    static void
nv_put_opt(cmdarg_T *cap, int fix_indent)
{
    int		regname = 0;
    void	*reg1 = NULL, *reg2 = NULL;
    int		empty = FALSE;
    int		was_visual = FALSE;
    int		dir;
    int		flags = 0;
    int		keep_registers = FALSE;

    if (cap->oap->op_type != OP_NOP)
    {
#ifdef FEAT_DIFF
	// "dp" is ":diffput"
	if (cap->oap->op_type == OP_DELETE && cap->cmdchar == 'p')
	{
	    clearop(cap->oap);
	    nv_diffgetput(TRUE, cap->opcount);
	}
	else
#endif
	    clearopbeep(cap->oap);
	return;
    }

#ifdef FEAT_JOB_CHANNEL
    if (bt_prompt(curbuf) && !prompt_curpos_editable())
    {
	clearopbeep(cap->oap);
	return;
    }
#endif

    if (fix_indent)
    {
	dir = (cap->cmdchar == ']' && cap->nchar == 'p')
	    ? FORWARD : BACKWARD;
	flags |= PUT_FIXINDENT;
    }
    else
	dir = (cap->cmdchar == 'P'
		|| ((cap->cmdchar == 'g' || cap->cmdchar == 'z')
		    && cap->nchar == 'P')) ? BACKWARD : FORWARD;
    prep_redo_cmd(cap);
    if (cap->cmdchar == 'g')
	flags |= PUT_CURSEND;
    else if (cap->cmdchar == 'z')
	flags |= PUT_BLOCK_INNER;

    if (VIsual_active)
    {
	// Putting in Visual mode: The put text replaces the selected
	// text.  First delete the selected text, then put the new text.
	// Need to save and restore the registers that the delete
	// overwrites if the old contents is being put.
	was_visual = TRUE;
	regname = cap->oap->regname;
	keep_registers = cap->cmdchar == 'P';
#ifdef FEAT_CLIPBOARD
	adjust_clip_reg(&regname);
#endif
	if (regname == 0 || regname == '"'
		|| VIM_ISDIGIT(regname) || regname == '-'
#ifdef FEAT_CLIPBOARD
		|| (clip_unnamed && (regname == '*' || regname == '+'))
#endif

	   )
	{
	    // The delete is going to overwrite the register we want to
	    // put, save it first.
	    reg1 = get_register(regname, TRUE);
	}

	// Now delete the selected text. Avoid messages here.
	cap->cmdchar = 'd';
	cap->nchar = NUL;
	cap->oap->regname = keep_registers ? '_' : NUL;
	++msg_silent;
	nv_operator(cap);
	do_pending_operator(cap, 0, FALSE);
	empty = (curbuf->b_ml.ml_flags & ML_EMPTY);
	--msg_silent;

	// delete PUT_LINE_BACKWARD;
	cap->oap->regname = regname;

	if (reg1 != NULL)
	{
	    // Delete probably changed the register we want to put, save
	    // it first. Then put back what was there before the delete.
	    reg2 = get_register(regname, FALSE);
	    put_register(regname, reg1);
	}

	// When deleted a linewise Visual area, put the register as
	// lines to avoid it joined with the next line.  When deletion was
	// characterwise, split a line when putting lines.
	if (VIsual_mode == 'V')
	    flags |= PUT_LINE;
	else if (VIsual_mode == 'v')
	    flags |= PUT_LINE_SPLIT;
	if (VIsual_mode == Ctrl_V && dir == FORWARD)
	    flags |= PUT_LINE_FORWARD;
	dir = BACKWARD;
	if ((VIsual_mode != 'V'
		    && curwin->w_cursor.col < curbuf->b_op_start.col)
		|| (VIsual_mode == 'V'
		    && curwin->w_cursor.lnum < curbuf->b_op_start.lnum))
	    // cursor is at the end of the line or end of file, put
	    // forward.
	    dir = FORWARD;
	// May have been reset in do_put().
	VIsual_active = TRUE;
    }
    do_put(cap->oap->regname, NULL, dir, cap->count1, flags);

    // If a register was saved, put it back now.
    if (reg2 != NULL)
	put_register(regname, reg2);

    // What to reselect with "gv"?  Selecting the just put text seems to
    // be the most useful, since the original text was removed.
    if (was_visual)
    {
	curbuf->b_visual.vi_start = curbuf->b_op_start;
	curbuf->b_visual.vi_end = curbuf->b_op_end;
	// need to adjust cursor position
	if (*p_sel == 'e')
	    inc(&curbuf->b_visual.vi_end);
    }

    // When all lines were selected and deleted do_put() leaves an empty
    // line that needs to be deleted now.
    if (empty && *ml_get(curbuf->b_ml.ml_line_count) == NUL)
    {
	ml_delete_flags(curbuf->b_ml.ml_line_count, ML_DEL_MESSAGE);
	deleted_lines(curbuf->b_ml.ml_line_count + 1, 1);

	// If the cursor was in that line, move it to the end of the last
	// line.
	if (curwin->w_cursor.lnum > curbuf->b_ml.ml_line_count)
	{
	    curwin->w_cursor.lnum = curbuf->b_ml.ml_line_count;
	    coladvance((colnr_T)MAXCOL);
	}
    }
    auto_format(FALSE, TRUE);
}

/*
 * "o" and "O" commands.
 */
    static void
nv_open(cmdarg_T *cap)
{
#ifdef FEAT_DIFF
    // "do" is ":diffget"
    if (cap->oap->op_type == OP_DELETE && cap->cmdchar == 'o')
    {
	clearop(cap->oap);
	nv_diffgetput(FALSE, cap->opcount);
    }
    else
#endif
    if (VIsual_active)  // switch start and end of visual
	v_swap_corners(cap->cmdchar);
#ifdef FEAT_JOB_CHANNEL
    else if (bt_prompt(curbuf))
	clearopbeep(cap->oap);
#endif
    else
	n_opencmd(cap);
}

#ifdef FEAT_NETBEANS_INTG
    static void
nv_nbcmd(cmdarg_T *cap)
{
    netbeans_keycommand(cap->nchar);
}
#endif

#ifdef FEAT_DND
    static void
nv_drop(cmdarg_T *cap UNUSED)
{
    do_put('~', NULL, BACKWARD, 1L, PUT_CURSEND);
}
#endif

/*
 * Trigger CursorHold event.
 * When waiting for a character for 'updatetime' K_CURSORHOLD is put in the
 * input buffer.  "did_cursorhold" is set to avoid retriggering.
 */
    static void
nv_cursorhold(cmdarg_T *cap)
{
    apply_autocmds(EVENT_CURSORHOLD, NULL, NULL, FALSE, curbuf);
    did_cursorhold = TRUE;
    cap->retval |= CA_COMMAND_BUSY;	// don't call edit() now
}