src/normal.c

/* vi:set ts=8 sts=4 sw=4 noet:
 *
 * VIM - Vi IMproved	by Bram Moolenaar
 *
 * 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
static int	restart_VIsual_select = 0;

#ifdef FEAT_EVAL
static void	set_vcount_ca(cmdarg_T *cap, int *set_prevcount);
#endif
static int	nv_compare(const void *s1, const void *s2);
static void	unshift_special(cmdarg_T *cap);
#ifdef FEAT_CMDL_INFO
static void	del_from_showcmd(int);
#endif

/*
 * 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(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);
#ifdef FEAT_TEXTOBJ
static void	nv_object(cmdarg_T *cap);
#endif
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);

static char *e_noident = N_("E349: No identifier under cursor");

/*
 * Function to be called for a Normal or Visual mode command.
 * The argument is a cmdarg_T.
 */
typedef void (*nv_func_T)(cmdarg_T *cap);

// Values for cmd_flags.
#define NV_NCH	    0x01	  // may need to get a second char
#define NV_NCH_NOP  (0x02|NV_NCH) // get second char when no operator pending
#define NV_NCH_ALW  (0x04|NV_NCH) // always get a second char
#define NV_LANG	    0x08	// second char needs language adjustment

#define NV_SS	    0x10	// may start selection
#define NV_SSS	    0x20	// may start selection with shift modifier
#define NV_STS	    0x40	// may stop selection without shift modif.
#define NV_RL	    0x80	// 'rightleft' modifies command
#define NV_KEEPREG  0x100	// don't clear regname
#define NV_NCW	    0x200	// not allowed in command-line window

/*
 * Generally speaking, every Normal mode command should either clear any
 * pending operator (with *clearop*()), or set the motion type variable
 * oap->motion_type.
 *
 * When a cursor motion command is made, it is marked as being a character or
 * line oriented motion.  Then, if an operator is in effect, the operation
 * becomes character or line oriented accordingly.
 */

/*
 * This table contains one entry for every Normal or Visual mode command.
 * The order doesn't matter, init_normal_cmds() will create a sorted index.
 * It is faster when all keys from zero to '~' are present.
 */
static const struct nv_cmd
{
    int		cmd_char;	// (first) command character
    nv_func_T   cmd_func;	// function for this command
    short_u	cmd_flags;	// NV_ flags
    short	cmd_arg;	// value for ca.arg
} nv_cmds[] =
{
    {NUL,	nv_error,	0,			0},
    {Ctrl_A,	nv_addsub,	0,			0},
    {Ctrl_B,	nv_page,	NV_STS,			BACKWARD},
    {Ctrl_C,	nv_esc,		0,			TRUE},
    {Ctrl_D,	nv_halfpage,	0,			0},
    {Ctrl_E,	nv_scroll_line,	0,			TRUE},
    {Ctrl_F,	nv_page,	NV_STS,			FORWARD},
    {Ctrl_G,	nv_ctrlg,	0,			0},
    {Ctrl_H,	nv_ctrlh,	0,			0},
    {Ctrl_I,	nv_pcmark,	0,			0},
    {NL,	nv_down,	0,			FALSE},
    {Ctrl_K,	nv_error,	0,			0},
    {Ctrl_L,	nv_clear,	0,			0},
    {CAR,	nv_down,	0,			TRUE},
    {Ctrl_N,	nv_down,	NV_STS,			FALSE},
    {Ctrl_O,	nv_ctrlo,	0,			0},
    {Ctrl_P,	nv_up,		NV_STS,			FALSE},
    {Ctrl_Q,	nv_visual,	0,			FALSE},
    {Ctrl_R,	nv_redo,	0,			0},
    {Ctrl_S,	nv_ignore,	0,			0},
    {Ctrl_T,	nv_tagpop,	NV_NCW,			0},
    {Ctrl_U,	nv_halfpage,	0,			0},
    {Ctrl_V,	nv_visual,	0,			FALSE},
    {'V',	nv_visual,	0,			FALSE},
    {'v',	nv_visual,	0,			FALSE},
    {Ctrl_W,	nv_window,	0,			0},
    {Ctrl_X,	nv_addsub,	0,			0},
    {Ctrl_Y,	nv_scroll_line,	0,			FALSE},
    {Ctrl_Z,	nv_suspend,	0,			0},
    {ESC,	nv_esc,		0,			FALSE},
    {Ctrl_BSL,	nv_normal,	NV_NCH_ALW,		0},
    {Ctrl_RSB,	nv_ident,	NV_NCW,			0},
    {Ctrl_HAT,	nv_hat,		NV_NCW,			0},
    {Ctrl__,	nv_error,	0,			0},
    {' ',	nv_right,	0,			0},
    {'!',	nv_operator,	0,			0},
    {'"',	nv_regname,	NV_NCH_NOP|NV_KEEPREG,	0},
    {'#',	nv_ident,	0,			0},
    {'$',	nv_dollar,	0,			0},
    {'%',	nv_percent,	0,			0},
    {'&',	nv_optrans,	0,			0},
    {'\'',	nv_gomark,	NV_NCH_ALW,		TRUE},
    {'(',	nv_brace,	0,			BACKWARD},
    {')',	nv_brace,	0,			FORWARD},
    {'*',	nv_ident,	0,			0},
    {'+',	nv_down,	0,			TRUE},
    {',',	nv_csearch,	0,			TRUE},
    {'-',	nv_up,		0,			TRUE},
    {'.',	nv_dot,		NV_KEEPREG,		0},
    {'/',	nv_search,	0,			FALSE},
    {'0',	nv_beginline,	0,			0},
    {'1',	nv_ignore,	0,			0},
    {'2',	nv_ignore,	0,			0},
    {'3',	nv_ignore,	0,			0},
    {'4',	nv_ignore,	0,			0},
    {'5',	nv_ignore,	0,			0},
    {'6',	nv_ignore,	0,			0},
    {'7',	nv_ignore,	0,			0},
    {'8',	nv_ignore,	0,			0},
    {'9',	nv_ignore,	0,			0},
    {':',	nv_colon,	0,			0},
    {';',	nv_csearch,	0,			FALSE},
    {'<',	nv_operator,	NV_RL,			0},
    {'=',	nv_operator,	0,			0},
    {'>',	nv_operator,	NV_RL,			0},
    {'?',	nv_search,	0,			FALSE},
    {'@',	nv_at,		NV_NCH_NOP,		FALSE},
    {'A',	nv_edit,	0,			0},
    {'B',	nv_bck_word,	0,			1},
    {'C',	nv_abbrev,	NV_KEEPREG,		0},
    {'D',	nv_abbrev,	NV_KEEPREG,		0},
    {'E',	nv_wordcmd,	0,			TRUE},
    {'F',	nv_csearch,	NV_NCH_ALW|NV_LANG,	BACKWARD},
    {'G',	nv_goto,	0,			TRUE},
    {'H',	nv_scroll,	0,			0},
    {'I',	nv_edit,	0,			0},
    {'J',	nv_join,	0,			0},
    {'K',	nv_ident,	0,			0},
    {'L',	nv_scroll,	0,			0},
    {'M',	nv_scroll,	0,			0},
    {'N',	nv_next,	0,			SEARCH_REV},
    {'O',	nv_open,	0,			0},
    {'P',	nv_put,		0,			0},
    {'Q',	nv_exmode,	NV_NCW,			0},
    {'R',	nv_Replace,	0,			FALSE},
    {'S',	nv_subst,	NV_KEEPREG,		0},
    {'T',	nv_csearch,	NV_NCH_ALW|NV_LANG,	BACKWARD},
    {'U',	nv_Undo,	0,			0},
    {'W',	nv_wordcmd,	0,			TRUE},
    {'X',	nv_abbrev,	NV_KEEPREG,		0},
    {'Y',	nv_abbrev,	NV_KEEPREG,		0},
    {'Z',	nv_Zet,		NV_NCH_NOP|NV_NCW,	0},
    {'[',	nv_brackets,	NV_NCH_ALW,		BACKWARD},
    {'\\',	nv_error,	0,			0},
    {']',	nv_brackets,	NV_NCH_ALW,		FORWARD},
    {'^',	nv_beginline,	0,			BL_WHITE | BL_FIX},
    {'_',	nv_lineop,	0,			0},
    {'`',	nv_gomark,	NV_NCH_ALW,		FALSE},
    {'a',	nv_edit,	NV_NCH,			0},
    {'b',	nv_bck_word,	0,			0},
    {'c',	nv_operator,	0,			0},
    {'d',	nv_operator,	0,			0},
    {'e',	nv_wordcmd,	0,			FALSE},
    {'f',	nv_csearch,	NV_NCH_ALW|NV_LANG,	FORWARD},
    {'g',	nv_g_cmd,	NV_NCH_ALW,		FALSE},
    {'h',	nv_left,	NV_RL,			0},
    {'i',	nv_edit,	NV_NCH,			0},
    {'j',	nv_down,	0,			FALSE},
    {'k',	nv_up,		0,			FALSE},
    {'l',	nv_right,	NV_RL,			0},
    {'m',	nv_mark,	NV_NCH_NOP,		0},
    {'n',	nv_next,	0,			0},
    {'o',	nv_open,	0,			0},
    {'p',	nv_put,		0,			0},
    {'q',	nv_record,	NV_NCH,			0},
    {'r',	nv_replace,	NV_NCH_NOP|NV_LANG,	0},
    {'s',	nv_subst,	NV_KEEPREG,		0},
    {'t',	nv_csearch,	NV_NCH_ALW|NV_LANG,	FORWARD},
    {'u',	nv_undo,	0,			0},
    {'w',	nv_wordcmd,	0,			FALSE},
    {'x',	nv_abbrev,	NV_KEEPREG,		0},
    {'y',	nv_operator,	0,			0},
    {'z',	nv_zet,		NV_NCH_ALW,		0},
    {'{',	nv_findpar,	0,			BACKWARD},
    {'|',	nv_pipe,	0,			0},
    {'}',	nv_findpar,	0,			FORWARD},
    {'~',	nv_tilde,	0,			0},

    // pound sign
    {POUND,	nv_ident,	0,			0},
    {K_MOUSEUP, nv_mousescroll,	0,			MSCR_UP},
    {K_MOUSEDOWN, nv_mousescroll, 0,			MSCR_DOWN},
    {K_MOUSELEFT, nv_mousescroll, 0,			MSCR_LEFT},
    {K_MOUSERIGHT, nv_mousescroll, 0,			MSCR_RIGHT},
    {K_LEFTMOUSE, nv_mouse,	0,			0},
    {K_LEFTMOUSE_NM, nv_mouse,	0,			0},
    {K_LEFTDRAG, nv_mouse,	0,			0},
    {K_LEFTRELEASE, nv_mouse,	0,			0},
    {K_LEFTRELEASE_NM, nv_mouse, 0,			0},
    {K_MOUSEMOVE, nv_mouse,	0,			0},
    {K_MIDDLEMOUSE, nv_mouse,	0,			0},
    {K_MIDDLEDRAG, nv_mouse,	0,			0},
    {K_MIDDLERELEASE, nv_mouse,	0,			0},
    {K_RIGHTMOUSE, nv_mouse,	0,			0},
    {K_RIGHTDRAG, nv_mouse,	0,			0},
    {K_RIGHTRELEASE, nv_mouse,	0,			0},
    {K_X1MOUSE, nv_mouse,	0,			0},
    {K_X1DRAG, nv_mouse,	0,			0},
    {K_X1RELEASE, nv_mouse,	0,			0},
    {K_X2MOUSE, nv_mouse,	0,			0},
    {K_X2DRAG, nv_mouse,	0,			0},
    {K_X2RELEASE, nv_mouse,	0,			0},
    {K_IGNORE,	nv_ignore,	NV_KEEPREG,		0},
    {K_NOP,	nv_nop,		0,			0},
    {K_INS,	nv_edit,	0,			0},
    {K_KINS,	nv_edit,	0,			0},
    {K_BS,	nv_ctrlh,	0,			0},
    {K_UP,	nv_up,		NV_SSS|NV_STS,		FALSE},
    {K_S_UP,	nv_page,	NV_SS,			BACKWARD},
    {K_DOWN,	nv_down,	NV_SSS|NV_STS,		FALSE},
    {K_S_DOWN,	nv_page,	NV_SS,			FORWARD},
    {K_LEFT,	nv_left,	NV_SSS|NV_STS|NV_RL,	0},
    {K_S_LEFT,	nv_bck_word,	NV_SS|NV_RL,		0},
    {K_C_LEFT,	nv_bck_word,	NV_SSS|NV_RL|NV_STS,	1},
    {K_RIGHT,	nv_right,	NV_SSS|NV_STS|NV_RL,	0},
    {K_S_RIGHT,	nv_wordcmd,	NV_SS|NV_RL,		FALSE},
    {K_C_RIGHT,	nv_wordcmd,	NV_SSS|NV_RL|NV_STS,	TRUE},
    {K_PAGEUP,	nv_page,	NV_SSS|NV_STS,		BACKWARD},
    {K_KPAGEUP,	nv_page,	NV_SSS|NV_STS,		BACKWARD},
    {K_PAGEDOWN, nv_page,	NV_SSS|NV_STS,		FORWARD},
    {K_KPAGEDOWN, nv_page,	NV_SSS|NV_STS,		FORWARD},
    {K_END,	nv_end,		NV_SSS|NV_STS,		FALSE},
    {K_KEND,	nv_end,		NV_SSS|NV_STS,		FALSE},
    {K_S_END,	nv_end,		NV_SS,			FALSE},
    {K_C_END,	nv_end,		NV_SSS|NV_STS,		TRUE},
    {K_HOME,	nv_home,	NV_SSS|NV_STS,		0},
    {K_KHOME,	nv_home,	NV_SSS|NV_STS,		0},
    {K_S_HOME,	nv_home,	NV_SS,			0},
    {K_C_HOME,	nv_goto,	NV_SSS|NV_STS,		FALSE},
    {K_DEL,	nv_abbrev,	0,			0},
    {K_KDEL,	nv_abbrev,	0,			0},
    {K_UNDO,	nv_kundo,	0,			0},
    {K_HELP,	nv_help,	NV_NCW,			0},
    {K_F1,	nv_help,	NV_NCW,			0},
    {K_XF1,	nv_help,	NV_NCW,			0},
    {K_SELECT,	nv_select,	0,			0},
#ifdef FEAT_GUI
    {K_VER_SCROLLBAR, nv_ver_scrollbar, 0,		0},
    {K_HOR_SCROLLBAR, nv_hor_scrollbar, 0,		0},
#endif
#ifdef FEAT_GUI_TABLINE
    {K_TABLINE, nv_tabline,	0,			0},
    {K_TABMENU, nv_tabmenu,	0,			0},
#endif
#ifdef FEAT_NETBEANS_INTG
    {K_F21,	nv_nbcmd,	NV_NCH_ALW,		0},
#endif
#ifdef FEAT_DND
    {K_DROP,	nv_drop,	NV_STS,			0},
#endif
    {K_CURSORHOLD, nv_cursorhold, NV_KEEPREG,		0},
    {K_PS,	nv_edit,	0,			0},
};

// Number of commands in nv_cmds[].
#define NV_CMDS_SIZE (sizeof(nv_cmds) / sizeof(struct nv_cmd))

// Sorted index of commands in nv_cmds[].
static short nv_cmd_idx[NV_CMDS_SIZE];

// The highest index for which
// nv_cmds[idx].cmd_char == nv_cmd_idx[nv_cmds[idx].cmd_char]
static int nv_max_linear;

/*
 * Compare functions for qsort() below, that checks the command character
 * through the index in nv_cmd_idx[].
 */
    static int
nv_compare(const void *s1, const void *s2)
{
    int		c1, c2;

    // The commands are sorted on absolute value.
    c1 = nv_cmds[*(const short *)s1].cmd_char;
    c2 = nv_cmds[*(const short *)s2].cmd_char;
    if (c1 < 0)
	c1 = -c1;
    if (c2 < 0)
	c2 = -c2;
    return c1 - c2;
}

/*
 * Initialize the nv_cmd_idx[] table.
 */
    void
init_normal_cmds(void)
{
    int		i;

    // Fill the index table with a one to one relation.
    for (i = 0; i < (int)NV_CMDS_SIZE; ++i)
	nv_cmd_idx[i] = i;

    // Sort the commands by the command character.
    qsort((void *)&nv_cmd_idx, (size_t)NV_CMDS_SIZE, sizeof(short), nv_compare);

    // Find the first entry that can't be indexed by the command character.
    for (i = 0; i < (int)NV_CMDS_SIZE; ++i)
	if (i != nv_cmds[nv_cmd_idx[i]].cmd_char)
	    break;
    nv_max_linear = i - 1;
}

/*
 * 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;
}

/*
 * 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;
#ifdef FEAT_CMDL_INFO
    int		need_flushbuf;		// need to call out_flush()
#endif
    pos_T	old_pos;		// cursor position before command
    int		mapped_len;
    static int	old_mapped_len = 0;
    int		idx;
#ifdef FEAT_EVAL
    int		set_prevcount = FALSE;
#endif
    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

    // 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 = 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() != SELECTMODE);

    /*
     * 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))
    {
	// 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.
	ins_char_typebuf(vgetc_char, vgetc_mod_mask);
	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
    }

#ifdef FEAT_CMDL_INFO
    need_flushbuf = add_to_showcmd(c);
#endif

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')
		|| (ca.count0 != 0 && (c == K_DEL || c == K_KDEL || c == '0')))
	{
	    if (c == K_DEL || c == K_KDEL)
	    {
		ca.count0 /= 10;
#ifdef FEAT_CMDL_INFO
		del_from_showcmd(4);	// delete the digit and ~@%
#endif
	    }
	    else
		ca.count0 = ca.count0 * 10 + (c - '0');
	    if (ca.count0 < 0)	    // got too large!
		ca.count0 = 999999999L;
#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(&ca, &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;
	    }
#ifdef FEAT_CMDL_INFO
	    need_flushbuf |= add_to_showcmd(c);
#endif
	}

	/*
	 * If we got CTRL-W there may be a/another count
	 */
	if (c == Ctrl_W && !ctrl_w && oap->op_type == OP_NOP)
	{
	    ctrl_w = TRUE;
	    ca.opcount = ca.count0;	// remember first count
	    ca.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;
#ifdef FEAT_CMDL_INFO
	    need_flushbuf |= add_to_showcmd(c);
#endif
	    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.
	oap->prev_opcount = ca.opcount;
	oap->prev_count0 = ca.count0;
    }
    else if (ca.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 (ca.count0)
	    ca.count0 *= ca.opcount;
	else
	    ca.count0 = ca.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.
     */
    ca.opcount = ca.count0;
    ca.count1 = (ca.count0 == 0 ? 1 : ca.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(ca.count0, ca.count1, set_prevcount);
#endif

    /*
     * 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 (text_locked() && (nv_cmds[idx].cmd_flags & NV_NCW))
    {
	// This command is not allowed while editing a cmdline: beep.
	clearopbeep(oap);
	text_locked_msg();
	goto normal_end;
    }
    if ((nv_cmds[idx].cmd_flags & NV_NCW) && curbuf_locked())
	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(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 an additional character if we need one.
     */
    if ((nv_cmds[idx].cmd_flags & NV_NCH)
	    && (((nv_cmds[idx].cmd_flags & NV_NCH_NOP) == NV_NCH_NOP
		    && oap->op_type == OP_NOP)
		|| (nv_cmds[idx].cmd_flags & NV_NCH_ALW) == NV_NCH_ALW
		|| (ca.cmdchar == 'q'
		    && oap->op_type == OP_NOP
		    && reg_recording == 0
		    && reg_executing == 0)
		|| ((ca.cmdchar == 'a' || ca.cmdchar == 'i')
		    && (oap->op_type != OP_NOP || VIsual_active))))
    {
	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 (ca.cmdchar == 'g')
	{
	    /*
	     * For 'g' get the next character now, so that we can check for
	     * "gr", "g'" and "g`".
	     */
	    ca.nchar = plain_vgetc();
	    LANGMAP_ADJUST(ca.nchar, TRUE);
#ifdef FEAT_CMDL_INFO
	    need_flushbuf |= add_to_showcmd(ca.nchar);
#endif
	    if (ca.nchar == 'r' || ca.nchar == '\'' || ca.nchar == '`'
						       || ca.nchar == Ctrl_BSL)
	    {
		cp = &ca.extra_char;	// need to get a third character
		if (ca.nchar != 'r')
		    lit = TRUE;			// get it literally
		else
		    repl = TRUE;		// get it in replace mode
	    }
	    else
		cp = NULL;		// no third character needed
	}
	else
	{
	    if (ca.cmdchar == 'r')		// get it in replace mode
		repl = TRUE;
	    cp = &ca.nchar;
	}
	lang = (repl || (nv_cmds[idx].cmd_flags & NV_LANG));

	/*
	 * Get a second or third character.
	 */
	if (cp != NULL)
	{
	    if (repl)
	    {
		State = 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 = LREPLACE;
		else
		    State = 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 & INSERT) && !p_ek)
	    {
#ifdef FEAT_JOB_CHANNEL
		ch_log_output = TRUE;
#endif
		// Disable bracketed paste and modifyOtherKeys here, we won't
		// recognize the escape sequences with 'esckeys' off.
		out_str(T_BD);
		out_str(T_CTE);
	    }

	    *cp = plain_vgetc();

	    if ((State & INSERT) && !p_ek)
	    {
#ifdef FEAT_JOB_CHANNEL
		ch_log_output = TRUE;
#endif
		// Re-enable bracketed paste mode and modifyOtherKeys
		out_str(T_BE);
		out_str(T_CTI);
	    }

	    if (langmap_active)
	    {
		// Undo the decrement done above
		++no_mapping;
		++allow_keys;
		State = 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 = NORMAL_BUSY;
#ifdef FEAT_CMDL_INFO
	    need_flushbuf |= add_to_showcmd(*cp);
#endif

	    if (!lit)
	    {
#ifdef FEAT_DIGRAPHS
		// Typing CTRL-K gets a digraph.
		if (*cp == Ctrl_K
			&& ((nv_cmds[idx].cmd_flags & NV_LANG)
			    || cp == &ca.extra_char)
			&& vim_strchr(p_cpo, CPO_DIGRAPH) == NULL)
		{
		    c = get_digraph(FALSE);
		    if (c > 0)
		    {
			*cp = c;
# ifdef FEAT_CMDL_INFO
			// Guessing how to update showcmd here...
			del_from_showcmd(3);
			need_flushbuf |= add_to_showcmd(*cp);
# endif
		    }
		}
#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 == &ca.extra_char
		    && ca.nchar == Ctrl_BSL
		    && (ca.extra_char == Ctrl_N || ca.extra_char == Ctrl_G))
	    {
		ca.cmdchar = Ctrl_BSL;
		ca.nchar = ca.extra_char;
		idx = find_command(ca.cmdchar);
	    }
	    else if ((ca.nchar == 'n' || ca.nchar == 'N') && ca.cmdchar == 'g')
		ca.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);
		    towait -= 50L;
		}
		if (c > 0)
		{
		    c = plain_vgetc();
		    if (c != Ctrl_N && c != Ctrl_G)
			vungetc(c);
		    else
		    {
			ca.cmdchar = Ctrl_BSL;
			ca.nchar = c;
			idx = find_command(ca.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 (ca.ncharC1 == 0)
		    ca.ncharC1 = c;
		else
		    ca.ncharC2 = c;
	    }
	    ++no_mapping;
	}
	--no_mapping;
	--allow_keys;
    }

#ifdef FEAT_CMDL_INFO
    /*
     * 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();
#endif
    if (ca.cmdchar != K_IGNORE)
    {
	if (ex_normal_busy)
	    did_cursorhold = save_did_cursorhold;
	else
	    did_cursorhold = FALSE;
    }

    State = 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.
     */
    if (ca.cmdchar != K_IGNORE)
	do_pending_operator(&ca, old_col, FALSE);

    /*
     * Wait for a moment when a message is displayed that will be overwritten
     * by the mode message.
     * 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.
     */
    if (       ((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)))
	    && oap->regname == 0
	    && !(ca.retval & CA_COMMAND_BUSY)
	    && stuff_empty()
	    && typebuf_typed()
	    && emsg_silent == 0
	    && !did_wait_return
	    && oap->op_type == OP_NOP)
    {
	int	save_State = State;

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

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

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

    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;
	    showmode();
	    restart_VIsual_select = 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;
    }
}

/*
 * End Visual mode.
 * This function should ALWAYS be called to end Visual mode, except from
 * do_pending_operator().
 */
    void
end_visual_mode(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();
#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();
}

/*
 * Reset VIsual_active and VIsual_reselect.
 */
    void
reset_VIsual_and_resel(void)
{
    if (VIsual_active)
    {
	end_visual_mode();
	redraw_curbuf_later(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(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(_("E348: No string under cursor"));
	    else
		emsg(_(e_noident));
	}
	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)
{
    ResetRedobuff();
    if (regname != 0)	// yank from specified buffer
    {
	AppendCharToRedobuff('"');
	AppendCharToRedobuff(regname);
    }
    if (num)
	AppendNumberToRedobuff(num);

    if (cmd1 != NUL)
	AppendCharToRedobuff(cmd1);
    if (cmd2 != NUL)
	AppendCharToRedobuff(cmd2);
    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;
}

    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
#ifdef FEAT_CMDL_INFO
    else
	clear_showcmd();
#endif
}

#if defined(FEAT_CMDL_INFO) || defined(PROTO)
/*
 * Routines for displaying a partly typed command
 */

#define SHOWCMD_BUFLEN SHOWCMD_COLS + 1 + 30
static char_u	showcmd_buf[SHOWCMD_BUFLEN];
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;

    cursor_off();

    len = (int)STRLEN(showcmd_buf);
    if (len == 0)
	showcmd_is_clear = TRUE;
    else
    {
	screen_puts(showcmd_buf, (int)Rows - 1, sc_col, 0);
	showcmd_is_clear = FALSE;
    }

    /*
     * 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
}
#endif

/*
 * 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)
	{
	    /*
	     * 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(VALID);
		cursor_correct();
		curwin->w_redr_status = TRUE;
	    }

	    /*
	     * do the horizontal scroll
	     */
	    if (want_hor && curwin->w_leftcol != tgt_leftcol)
	    {
		curwin->w_leftcol = tgt_leftcol;
		leftcol_changed();
	    }
	}
    }

    /*
     * 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))
    {
	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);
#ifdef FEAT_FOLDING
    else if ((fdo_flags & FDO_SEARCH) && KeyTyped && oap->op_type == OP_NOP)
	foldOpenCursor();
#endif
}

/*
 * 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(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;		// test 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)
		// 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 (curwin->w_cursor.lnum == 1)
		{
		    retval = FAIL;
		    break;
		}
		--curwin->w_cursor.lnum;
#ifdef FEAT_FOLDING
		// Move to the start of a closed fold.  Don't do that when
		// 'foldopen' contains "all": it will open in a moment.
		if (!(fdo_flags & FDO_ALL))
		    (void)hasFolding(curwin->w_cursor.lnum,
						&curwin->w_cursor.lnum, NULL);
#endif
		linelen = linetabsize(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)
		// move forward within line
		curwin->w_curswant += width2;
	    else
	    {
		// to next line
#ifdef FEAT_FOLDING
		// Move to the end of a closed fold.
		(void)hasFolding(curwin->w_cursor.lnum, NULL,
						      &curwin->w_cursor.lnum);
#endif
		if (curwin->w_cursor.lnum == curbuf->b_ml.ml_line_count)
		{
		    retval = FAIL;
		    break;
		}
		curwin->w_cursor.lnum++;
		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(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;

	/*
	 * 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

	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

    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;
#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())
    {
	// 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
#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(VALID);
}

/*
 * 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
#ifdef FEAT_SPELL
    int		undo = FALSE;
#endif
    long        siso = get_sidescrolloff_value();

    if (VIM_ISDIGIT(nchar))
    {
	/*
	 * "z123{nchar}": edit the count before obtaining {nchar}
	 */
	if (checkclearop(cap->oap))
	    return;
	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;
#ifdef FEAT_CMDL_INFO
	    (void)add_to_showcmd(nchar);
#endif
	    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;
		goto dozet;
	    }
	    else
	    {
		clearopbeep(cap->oap);
		break;
	    }
	}
	cap->oap->op_type = OP_NOP;
	return;
    }

dozet:
    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(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);
		redraw_later(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(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)
		{
		    if ((colnr_T)cap->count1 > curwin->w_leftcol)
			curwin->w_leftcol = 0;
		    else
			curwin->w_leftcol -= (colnr_T)cap->count1;
		    leftcol_changed();
		}
		break;

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

		// "zl" - scroll screen to the left
    case 'l':
    case K_RIGHT:
		if (!curwin->w_p_wrap)
		{
		    // scroll the window left
		    curwin->w_leftcol += (colnr_T)cap->count1;
		    leftcol_changed();
		}
		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(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(NOT_VALID);
		    }
		}
		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(_("E352: 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"
		++no_mapping;
		++allow_keys;   // no mapping for nchar, but allow key codes
		nchar = plain_vgetc();
		LANGMAP_ADJUST(nchar, TRUE);
		--no_mapping;
		--allow_keys;
#ifdef FEAT_CMDL_INFO
		(void)add_to_showcmd(nchar);
#endif
		if (vim_strchr((char_u *)"gGwW", nchar) == NULL)
		{
		    clearopbeep(cap->oap);
		    break;
		}
		undo = TRUE;
		// FALLTHROUGH

    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
		{
		    char_u  *ptr = NULL;
		    int	    len;

		    if (checkclearop(cap->oap))
			break;
		    if (VIsual_active && get_visual_text(cap, &ptr, &len)
								      == FAIL)
			return;
		    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;
		    spell_add_word(ptr, len, nchar == 'w' || nchar == 'W'
					      ? SPELL_ADD_BAD : SPELL_ADD_GOOD,
					    (nchar == 'G' || nchar == 'W')
						       ? 0 : (int)cap->count1,
					    undo);
		}
		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
    gui_do_horiz_scroll(scrollbar_value, FALSE);
}
#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;

    if (VIsual_active)
	nv_operator(cap);
    else
    {
	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)
	{
	    // 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
	cmd_result = do_cmdline(NULL, getexline, NULL,
			    cap->oap->op_type != OP_NOP ? DOCMD_KEEPLINE : 0);

	// 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;
	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))
    {
#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(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;
	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))
    {
	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);
}

/*
 * 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;
    int		isman;
    int		isman_s;

    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_noident));	 // 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':
	    if (kp_help)
		STRCPY(buf, "he! ");
	    else if (kp_ex)
	    {
		if (cap->count0 != 0)
		    vim_snprintf((char *)buf, buflen, "%s %ld",
							     kp, cap->count0);
		else
		    STRCPY(buf, kp);
		STRCAT(buf, " ");
	    }
	    else
	    {
		// 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)
		{
		    emsg(_(e_noident));	 // found dashes only
		    vim_free(buf);
		    return;
		}

		// 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, " ");
		}
	    }
	    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, FALSE);
	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 *)(p_magic ? "/.*~[^$\\" : "/^$\\");
	else if (cmdchar == '#')
	    aux_ptr = (char_u *)(p_magic ? "/?.*~[^$\\" : "/?^$\\");
	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 (has_mbyte)
	    // Correct the length to include the whole last character.
	    *lenp += (*mb_ptr2len)(*pp + (*lenp - 1)) - 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);
		    --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);
    }
    else
    {
	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
    {
#ifdef FEAT_CMDWIN
	// In the cmdline window a <CR> executes the command.
	if (cmdwin_type != 0 && cap->cmdchar == CAR)
	    cmdwin_result = CAR;
	else
#endif
#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);
	}
    }
}

#ifdef FEAT_SEARCHPATH
/*
 * 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 (text_locked())
    {
	clearopbeep(cap->oap);
	text_locked_msg();
	return;
    }
    if (curbuf_locked())
    {
	clearop(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);
}
#endif

/*
 * <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, TRUE);

    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;
    }
}

/*
 * 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;

    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
    }

    // "/$" 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);
    else
    {
	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
    }
}

/*
 * "[" and "]" commands.
 * cap->arg is BACKWARD for "[" and FORWARD for "]".
 */
    static void
nv_brackets(cmdarg_T *cap)
{
    pos_T	new_pos = {0, 0, 0};
    pos_T	prev_pos;
    pos_T	*pos = NULL;	    // init for GCC
    pos_T	old_pos;	    // cursor position before command
    int		flag;
    long	n;
    int		findc;
    int		c;

    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.

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

#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 *)
# ifdef EBCDIC
		"iI\005dD\067",
# else
		"iI\011dD\004",
# endif
		cap->nchar) != NULL)
    {
	char_u	*ptr;
	int	len;

	if ((len = find_ident_under_cursor(&ptr, FIND_IDENT)) == 0)
	    clearop(cap->oap);
	else
	{
	    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);
	    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))
    {
	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 "][": 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 CTRL-G will give same value.  Watch out for a
	    // large line count, the line number must not go negative!
	    if (curbuf->b_ml.ml_line_count > 1000000)
		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 > 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);
    else
    {
	// 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))
    {
	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);
    else
    {
	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))
    {
#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();
	// 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 = 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.  At the same time we let know that the
		 * line will be changed.
		 */
		ptr = ml_get_buf(curbuf, curwin->w_cursor.lnum, TRUE);
		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)
		    ptr[curwin->w_cursor.col] = c;
		}
		else
		    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,
							   (long)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);
    }
    else if (!checkclearopq(cap->oap))
    {
	if (!curbuf->b_p_ma)
	    emsg(_(e_modifiable));
	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
    }
    else if (!checkclearopq(cap->oap))
    {
	if (!curbuf->b_p_ma)
	    emsg(_(e_modifiable));
	else
	{
	    if (cap->extra_char == Ctrl_V)	// get another character
		cap->extra_char = get_literal();
	    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);
			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 botom.
    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)
{
#ifdef FEAT_JUMPLIST
    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))
    {
	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(_("E664: changelist is empty"));
	    else if (cap->count1 < 0)
		emsg(_("E662: At start of changelist"));
	    else
		emsg(_("E663: 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
    }
#else
    clearopbeep(cap->oap);
#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();
	}
	redraw_curbuf_later(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;
		if (curwin->w_cursor.lnum > curbuf->b_ml.ml_line_count)
		    curwin->w_cursor.lnum = curbuf->b_ml.ml_line_count;
	    }
	    VIsual_mode = resel_VIsual_mode;
	    if (VIsual_mode == 'v')
	    {
		if (resel_VIsual_line_count <= 1)
		{
		    validate_virtcol();
		    curwin->w_curswant = curwin->w_virtcol
					+ resel_VIsual_vcol * cap->count0 - 1;
		}
		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)
	    {
		validate_virtcol();
		curwin->w_curswant = curwin->w_virtcol
					+ resel_VIsual_vcol * cap->count0 - 1;
		coladvance(curwin->w_curswant);
	    }
	    else
		curwin->w_set_curswant = TRUE;
	    redraw_curbuf_later(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.
 */
    void
may_start_select(int c)
{
    VIsual_select = (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
    // Check for redraw before changing the state.
    conceal_check_cursor_line();
#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 && (ve_flags & VE_BLOCK) && gchar_cursor() == TAB)
    {
	validate_virtcol();
	coladvance(curwin->w_virtcol);
    }
    VIsual = curwin->w_cursor;

#ifdef FEAT_FOLDING
    foldAdjustVisual();
#endif

    setmouse();
#ifdef FEAT_CONCEAL
    // Check for redraw after changing the state.
    conceal_check_cursor_line();
#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 < 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 *)"st");
}

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

    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':
	if (checkclearop(oap))
	    break;

	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();
	else
	{
	    // 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;
	    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(INVERTED);
	    showmode();
	}
	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:
# ifdef EBCDIC
	// EBCDIC: 'v'-'h' != '^v'-'^h'
	if (cap->nchar == Ctrl_H)
	    cap->cmdchar = Ctrl_V;
	else
# endif
	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; also when
	// in a closed fold
	if (!curwin->w_p_wrap
#ifdef FEAT_FOLDING
		|| hasFolding(curwin->w_cursor.lnum, NULL, NULL)
#endif
		)
	{
	    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; also when
	// in a closed fold
	if (!curwin->w_p_wrap
#ifdef FEAT_FOLDING
		|| hasFolding(curwin->w_cursor.lnum, NULL, NULL)
#endif
	   )
	{
	    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^" and "g$": Like "0", "^" and "$" but for screen lines.
     * "gm": middle of "g0" and "g$".
     */
    case '^':
	flag = TRUE;
	// FALLTHROUGH

    case '0':
    case 'm':
    case K_HOME:
    case K_KHOME:
	oap->motion_type = MCHAR;
	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();

	    validate_virtcol();
	    i = 0;
	    if (curwin->w_virtcol >= (colnr_T)width1 && width2 > 0)
		i = (curwin->w_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;
	break;

    case 'M':
	{
	    char_u  *ptr = ml_get_curline();

	    oap->motion_type = MCHAR;
	    oap->inclusive = FALSE;
	    if (has_mbyte)
		i = mb_string2cells(ptr, (int)STRLEN(ptr));
	    else
		i = (int)STRLEN(ptr);
	    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;

    case '_':
	// "g_": to the last non-blank character in the line or <count> lines
	// downward.
	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);
	else
	{
	    char_u  *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);
	}
	break;

    case '$':
    case K_END:
    case K_KEND:
	{
	    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();

		    validate_virtcol();
		    i = width1 - 1;
		    if (curwin->w_virtcol >= (colnr_T)width1)
			i += ((curwin->w_virtcol - width1) / width2 + 1)
								     * width2;
		    coladvance((colnr_T)i);

		    // Make sure we stick in this column.
		    validate_virtcol();
		    curwin->w_curswant = curwin->w_virtcol;
		    curwin->w_set_curswant = FALSE;
		    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 > (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);

		// Make sure we stick in this column.
		validate_virtcol();
		curwin->w_curswant = curwin->w_virtcol;
		curwin->w_set_curswant = FALSE;
	    }
	}
	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':
	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);
	break;

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

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

	// "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);
	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 (text_locked())
	{
	    clearopbeep(cap->oap);
	    text_locked_msg();
	    break;
	}

	if (!checkclearopq(oap))
	    do_exmode(TRUE);
	break;

#ifdef FEAT_JUMPLIST
    case ',':
	nv_pcmark(cap);
	break;

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

    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))
    {
#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) == 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))
    {
	/*
	 * 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
 */
    static void
nv_redo(cmdarg_T *cap)
{
    if (!checkclearopq(cap->oap))
    {
	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);
    }
    else if (!checkclearopq(cap->oap))
    {
	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() && (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;
    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;
#ifdef FEAT_CMDWIN
	if (cmdwin_type != 0)
	    cmdwin_result = Ctrl_C;
#endif
	if (VIsual_active)
	{
	    end_visual_mode();		// stop Visual
	    redraw_curbuf_later(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
#ifdef FEAT_CMDWIN
		&& cmdwin_type == 0
#endif
		&& !VIsual_active
		&& no_reason)
	{
	    if (anyBufIsChanged())
		msg(_("Type  :qa!  and press <Enter> to abandon all changes and exit Vim"));
	    else
		msg(_("Type  :qa  and press <Enter> to exit Vim"));
	}

	// 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;
#ifdef FEAT_CMDWIN
	if (cmdwin_type != 0)
	{
	    cmdwin_result = K_IGNORE;
	    got_int = FALSE;	// don't stop executing autocommands et al.
	    return;
	}
#endif
    }

    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(INVERTED);
    }
    else if (no_reason)
	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 (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 = 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))
    {
#ifdef FEAT_TEXTOBJ
	nv_object(cap);
#else
	clearopbeep(cap->oap);
#endif
    }
#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_modifiable));
	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;

	// 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;

	// When the last char in the line was deleted then append. Detect this
	// by checking if the cursor moved to before the Visual area.
	if (*ml_get_cursor() != NUL && LT_POS(curwin->w_cursor, old_pos)
				       && LT_POS(curwin->w_cursor, old_visual))
	    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 = 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;
}

#ifdef FEAT_TEXTOBJ
/*
 * "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;
	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;
	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;
}
#endif

/*
 * "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);
    }
    else if (!checkclearop(cap->oap))
    {
#ifdef FEAT_CMDWIN
	if (cap->nchar == ':' || cap->nchar == '/' || cap->nchar == '?')
	{
	    stuffcharReadbuff(cap->nchar);
	    stuffcharReadbuff(K_CMDWIN);
	}
	else
#endif
	    // (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);
    else if (!checkclearop(cap->oap))
    {
	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;

    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);
    }
#ifdef FEAT_JOB_CHANNEL
    else if (bt_prompt(curbuf) && !prompt_curpos_editable())
    {
	clearopbeep(cap->oap);
    }
#endif
    else
    {
	if (fix_indent)
	{
	    dir = (cap->cmdchar == ']' && cap->nchar == 'p')
							 ? FORWARD : BACKWARD;
	    flags |= PUT_FIXINDENT;
	}
	else
	    dir = (cap->cmdchar == 'P'
				 || (cap->cmdchar == 'g' && cap->nchar == 'P'))
							 ? BACKWARD : FORWARD;
	prep_redo_cmd(cap);
	if (cap->cmdchar == 'g')
	    flags |= PUT_CURSEND;

	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;
#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 = 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, 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('~', 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
}