/* 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"

/*
 * The Visual area is remembered for reselection.
 */
static int resel_VIsual_mode = NUL;      /* 'v', 'V', or Ctrl-V */
static linenr_T resel_VIsual_line_count; /* number of lines */
static colnr_T resel_VIsual_vcol;        /* nr of cols or end col */
static int VIsual_mode_orig = NUL;       /* saved Visual mode */

static int restart_VIsual_select = 0;

/* LIBVIM: Because each operator is an independendent instance of `oap`,
 * we need to persist the register for operators like `"`.
 *
 * This keeps track of whether or not there was a persisted
 * register from the previous operation.
 */
static int keep_reg = 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 op_colon(oparg_T *oap);
static void op_function(oparg_T *oap);
static void prep_redo(int regname, long, int, int, int, int, int);
static void clearop(oparg_T *oap);
static void clearopbeep(oparg_T *oap);
static void may_clear_cmdline(void);

/*
 * 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_scroll_line(cmdarg_T *cap);
static void nv_zet(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);
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_c(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 int unadjust_for_sel(void);
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);
static void nv_cursorhold(cmdarg_T *cap);
static void get_op_vcol(oparg_T *oap, colnr_T col, int initial);

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},
    {'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_c, 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_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},
    {K_CURSORHOLD, nv_cursorhold, NV_KEEPREG, 0},
    {K_PS, nv_edit, 0, 0},
};

#define strstartswith(a, b) (!strncmp(a, b, strlen(b)))

void toggle_comment_lines(linenr_T start, linenr_T end)
{
  linenr_T lnum;

  // if end is before start, normalize by swapping
  if (start > end)
  {
    lnum = start;
    start = end;
    end = lnum;
  }

  // save state for undo

  int ret = FAIL;
  if (toggleCommentsCallback != NULL)
  {
    int originalCount = end - start + 1;

    linenr_T newCount;
    char_u **lines;

    ret = toggleCommentsCallback(curbuf,
                                 start,
                                 end,
                                 &newCount,
                                 &lines);

    if (newCount != originalCount)
    {
      ret = FAIL;
    }

    if (ret == OK)
    {
      u_save(start - 1, end + 1);

      // Apply updates from the callback
      for (int i = 0; i < newCount; i++)
      {

        // Don't need to make a copy of the line - it's already allocated
        ml_replace(start + i, lines[i], /*copy*/ FALSE);
      };

      // mark dirty
      changed_lines(start, 0, end + 1, 0);

      vim_free(lines);

      // set cursor to beginning
      curwin->w_cursor.lnum = start;
      curwin->w_cursor.col = 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;
}

typedef enum
{
  NORMAL_INITIAL,
  NORMAL_START_COUNT,
  NORMAL_COUNT,
  NORMAL_END_COUNT,
  NORMAL_FIRST_CHARACTER,
  NORMAL_SECOND_CHARACTER,
  NORMAL_THIRD_CHARACTER,

  NORMAL_EXECUTE_COMMAND,
} normalState_T;

typedef struct
{
  cmdarg_T ca;
  oparg_T *oap;
  int c;
  int ctrl_w;
  int old_col;
  pos_T old_pos;
  int mapped_len;
  int idx;
#ifdef FEAT_EVAL
  int set_prevcount;
  normalState_T state;
#endif

  int returnState;           // The state we are returning from
  pos_T returnPriorPosition; // The cursor position prior to running the state
} normalCmd_T;

void start_normal_mode(normalCmd_T *context)
{
  context->state = NORMAL_INITIAL;
  context->ctrl_w = FALSE;
  context->old_col = curwin->w_curswant;
  context->returnState = NORMAL;
  clear_oparg(context->oap);
  cmdarg_T ca;
  vim_memset(&ca, 0, sizeof(ca));
  ca.oap = context->oap;
  oparg_T *oap = context->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;

  context->ca = ca;

  finish_op = FALSE;

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

  /* Consume register if there is one persisted from previous operation */
  if (keep_reg != 0)
  {
    context->oap->regname = keep_reg;
    keep_reg = 0;
  }

  context->mapped_len = typebuf_maplen();

  State = NORMAL_BUSY;

#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 (readbuf1_empty())
    set_vcount_ca(&ca, &context->set_prevcount);
#endif
}

void *state_normal_cmd_initialize()
{
  normalCmd_T *context = (normalCmd_T *)alloc(sizeof(normalCmd_T));
  oparg_T *oap = alloc(sizeof(oparg_T));
  context->oap = oap;

  start_normal_mode(context);

  return context;
}

int state_normal_pending_operator(void *ctx, pendingOp_T *pendingOp)
{
  if (ctx == NULL)
  {
    return FALSE;
  }

  normalCmd_T *context = (normalCmd_T *)ctx;

  if (context->oap == NULL)
  {
    return FALSE;
  }

  if (context->oap->op_type == OP_NOP)
  {
    return FALSE;
  }

  pendingOp->op_type = context->oap->op_type;
  pendingOp->regname = context->oap->regname;
  pendingOp->count = context->ca.opcount;

  return TRUE;
}

void state_normal_cmd_cleanup(void *ctx)
{
  normalCmd_T *context = (normalCmd_T *)ctx;
  vim_free(context->oap);
  vim_free(context);
}

static int old_mapped_len = 0;

executionStatus_T state_normal_cmd_execute(void *ctx, int c)
{
  LANGMAP_ADJUST(c, get_real_state() != SELECTMODE);
  normalCmd_T *context = (normalCmd_T *)ctx;

  if (context->returnState != NORMAL)
  {

    switch (context->returnState)
    {
    case INSERT:
      // If we are coming back from insert, restart normal mode
      start_normal_mode(context);
      break;
    case CMDLINE:;
      // If we're coming back from command line, the command
      // hasn't been executed yet.
      char_u *cmd = ccline.cmdbuff;
      char_u cmdc = ccline.cmdfirstc;
      if (cmd == NULL)
      {
        curwin->w_cursor = context->returnPriorPosition;
        clearop(context->oap);
      }
      else if (cmdc == '/' || cmdc == '?')
      {
        context->ca.searchbuf = cmd;
        /* Seed the search - bump it forward and back so everything is set for N and n */
        if (cmdc == '/')
        {
          (void)normal_search(&context->ca, cmdc, cmd, 0);
          (void)normal_search(&context->ca, cmdc, cmd, SEARCH_REV | SEARCH_END);
        }
        else
        {
          (void)normal_search(&context->ca, cmdc, cmd, SEARCH_START);
          (void)normal_search(&context->ca, cmdc, cmd, SEARCH_REV | SEARCH_START);
        }

        /* TODO: SEARCH_MARK parameter - how do we wire that up? We may need to stash save_cursor somewhere. */
        /* (void)normal_search(cap, cap->cmdchar, cap->searchbuf, */
        /*                     (cap->arg || !EQUAL_POS(save_cursor, curwin->w_cursor)) */
        /*                         ? 0 */
        /*                         : SEARCH_MARK); */
      }
      if (context->oap->op_type == OP_NOP)
      {
        start_normal_mode(context);
      }
      else
      {
        // We have a pending operator, so finish it
        if (finish_op || VIsual_active)
        {
          do_pending_operator(&context->ca, context->old_col, FALSE);
        }

        int stateMode = sm_get_current_mode();
        if (stateMode != NORMAL)
        {
          context->returnState = stateMode;
          context->returnPriorPosition = curwin->w_cursor;
        }
        else
        {
          start_normal_mode(context);
        }
      }
      return HANDLED;
      break;
    default:
      break;
    }

    context->returnState = NORMAL;
  }

  oparg_T *oap = context->oap;

restart_state:
  switch (context->state)
  {
  case NORMAL_INITIAL:
    /*
     * 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 && context->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(c);
      if (restart_edit != 0)
        c = 'd';
      else
        c = 'c';
      msg_nowait = TRUE;       /* don't delay going to insert mode */
      context->mapped_len = 0; /* do go to Insert mode */
    }
    context->state = NORMAL_START_COUNT;
    goto restart_state;
  case NORMAL_START_COUNT:
    if (!((c >= '1' && c <= '9') ||
          (context->ca.count0 != 0 &&
           (c == K_DEL || c == K_KDEL || c == '0'))))
    {
      context->state = NORMAL_FIRST_CHARACTER;
      goto restart_state;
    }
    else
    {
      context->state = NORMAL_COUNT;
      goto restart_state;
    }

    break;
  case NORMAL_COUNT:
    if (c == K_DEL || c == K_KDEL)
    {
      context->ca.count0 /= 10;
    }
    else
      context->ca.count0 = context->ca.count0 * 10 + (c - '0');
    if (context->ca.count0 < 0) /* got too large! */
      context->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 (readbuf1_empty())
      set_vcount_ca(&context->ca, &context->set_prevcount);
#endif
    ++no_zero_mapping; /* don't map zero here */
    context->state = NORMAL_END_COUNT;
    return HANDLED;
    break;
  case NORMAL_END_COUNT:
    --no_zero_mapping;
    context->state = NORMAL_START_COUNT;
    goto restart_state;
    break;
  case NORMAL_FIRST_CHARACTER:
    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 = context->ca.opcount;
      oap->prev_count0 = context->ca.count0;
    }
    else if (context->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 (context->ca.count0)
        context->ca.count0 *= context->ca.opcount;
      else
        context->ca.count0 = context->ca.opcount;
    }
    else if (c == Ctrl_W && !context->ctrl_w)
    {
      context->ctrl_w = TRUE;
      // After <C-W>, might get another count...
      context->state = NORMAL_START_COUNT;
      return HANDLED;
    }

    /*
     * 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.
     */
    context->ca.opcount = context->ca.count0;
    context->ca.count1 = (context->ca.count0 == 0 ? 1 : context->ca.count0);

#ifdef FEAT_EVAL
    /*
     * Only set v:count when called from main() and not a stuffed command.
     * Do set it for redo.
     */
    if (readbuf1_empty())
      set_vcount(context->ca.count0, context->ca.count1,
                 context->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 (context->ctrl_w)
    {
      context->ca.nchar = c;
      context->ca.cmdchar = Ctrl_W;
    }
    else
      context->ca.cmdchar = c;
    context->idx = find_command(context->ca.cmdchar);
    if (context->idx < 0)
    {
      /* Not a known command: beep. */
      clearopbeep(oap);
      return COMPLETED;
    }

    if ((nv_cmds[context->idx].cmd_flags & NV_NCH) &&
        (((nv_cmds[context->idx].cmd_flags & NV_NCH_NOP) == NV_NCH_NOP &&
          oap->op_type == OP_NOP) ||
         (nv_cmds[context->idx].cmd_flags & NV_NCH_ALW) == NV_NCH_ALW ||
         (context->ca.cmdchar == 'q' && oap->op_type == OP_NOP &&
          reg_recording == 0 && reg_executing == 0) ||
         ((context->ca.cmdchar == 'a' || context->ca.cmdchar == 'i') &&
          (oap->op_type != OP_NOP || VIsual_active))))
    {
      context->state = NORMAL_SECOND_CHARACTER;
      return HANDLED;
    }
    else
    {
      context->state = NORMAL_EXECUTE_COMMAND;
      goto restart_state;
    }
    break;
  case NORMAL_SECOND_CHARACTER:
    context->state = NORMAL_EXECUTE_COMMAND;
    context->ca.nchar = c;
    goto restart_state;
    break;
  case NORMAL_THIRD_CHARACTER:
    context->state = NORMAL_EXECUTE_COMMAND;
    goto restart_state;
    break;

  case NORMAL_EXECUTE_COMMAND:;
    int previous_finish_op = finish_op;

    if (context->ca.cmdchar == 'r' && context->ca.nchar == ESC)
    {
      clearop(oap);
      context->state = NORMAL_START_COUNT;
      context->ca.count0 = 0;
      context->set_prevcount = TRUE;
      return HANDLED;
    }
    /*
     * Execute the command!
     * Call the command function found in the commands table.
     */
    context->ca.arg = nv_cmds[context->idx].cmd_arg;
    (nv_cmds[context->idx].cmd_func)(&context->ca);

    finish_op = (oap->op_type != OP_NOP);

    int stateMode = sm_get_current_mode();
    if (stateMode != NORMAL)
    {
      context->returnState = stateMode;
      context->returnPriorPosition = curwin->w_cursor;
      return HANDLED;
    }

    if (finish_op && !previous_finish_op && !VIsual_active)
    {
      context->state = NORMAL_INITIAL;
      context->ca.count0 = 0;
#ifdef FEAT_EVAL
      context->set_prevcount = TRUE;
#endif
      return HANDLED;
    }

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

        /* Adjust the register according to 'clipboard', so that when
         * "unnamed" is present it becomes '*' or '+' instead of '"'. */
        adjust_clip_reg(&regname);

        set_reg_var(regname);
      }
#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...
     */
    if (finish_op || VIsual_active)
    {
      do_pending_operator(&context->ca, context->old_col, FALSE);
    }

    if (restart_edit != 0 && stuff_empty())
    {
      sm_push_insert('i', FALSE, context->ca.count1);
    }

    /*
     * Some operators, like 'change', will cause a transition to a new mode.
     * If that's the case, we need to switch gears here and record state state
     * for when we transition back.
     */
    stateMode = sm_get_current_mode();
    if (stateMode != NORMAL)
    {
      context->returnState = stateMode;
      context->returnPriorPosition = curwin->w_cursor;
      return HANDLED;
    }

    if (finish_op || oap->op_type == OP_NOP)
    {
      finish_op = FALSE;
      /* If the register wasn't cleared, it needs to persist to next op */
      if (context->oap->regname != 0)
      {
        keep_reg = context->oap->regname;
      }
      return COMPLETED;
    }
    else
    {
      return HANDLED;
    }
    break;
  }

  return HANDLED;
}

#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

/*
 * Handle an operator after Visual mode or when the movement is finished.
 * "gui_yank" is true when yanking text for the clipboard.
 */
void do_pending_operator(cmdarg_T *cap, int old_col, int gui_yank)
{
  oparg_T *oap = cap->oap;
  pos_T old_cursor;
  int empty_region_error;
  int restart_edit_save;
#ifdef FEAT_LINEBREAK
  int lbr_saved = curwin->w_p_lbr;
#endif

  /* The visual area is remembered for redo */
  static int redo_VIsual_mode = NUL;      /* 'v', 'V', or Ctrl-V */
  static linenr_T redo_VIsual_line_count; /* number of lines */
  static colnr_T redo_VIsual_vcol;        /* number of cols or end column */
  static long redo_VIsual_count;          /* count for Visual operator */
  static int redo_VIsual_arg;             /* extra argument */
  int include_line_break = FALSE;

  old_cursor = curwin->w_cursor;

  /*
   * If an operation is pending, handle it...
   */
  if ((finish_op || VIsual_active) && oap->op_type != OP_NOP)
  {
    // Yank can be redone when 'y' is in 'cpoptions', but not when yanking
    // for the clipboard.
    int redo_yank = vim_strchr(p_cpo, CPO_YANK) != NULL && !gui_yank;

#ifdef FEAT_LINEBREAK
    /* Avoid a problem with unwanted linebreaks in block mode. */
    if (curwin->w_p_lbr)
      curwin->w_valid &= ~VALID_VIRTCOL;
    curwin->w_p_lbr = FALSE;
#endif
    oap->is_VIsual = VIsual_active;
    if (oap->motion_force == 'V')
      oap->motion_type = MLINE;
    else if (oap->motion_force == 'v')
    {
      /* If the motion was linewise, "inclusive" will not have been set.
       * Use "exclusive" to be consistent.  Makes "dvj" work nice. */
      if (oap->motion_type == MLINE)
        oap->inclusive = FALSE;
      /* If the motion already was characterwise, toggle "inclusive" */
      else if (oap->motion_type == MCHAR)
        oap->inclusive = !oap->inclusive;
      oap->motion_type = MCHAR;
    }
    else if (oap->motion_force == Ctrl_V)
    {
      /* Change line- or characterwise motion into Visual block mode. */
      if (!VIsual_active)
      {
        VIsual_active = TRUE;
        VIsual = oap->start;
      }
      VIsual_mode = Ctrl_V;
      VIsual_select = FALSE;
      VIsual_reselect = FALSE;
    }

    /* Only redo yank when 'y' flag is in 'cpoptions'. */
    /* Never redo "zf" (define fold). */
    if ((redo_yank || oap->op_type != OP_YANK) &&
        ((!VIsual_active || oap->motion_force)
         /* Also redo Operator-pending Visual mode mappings */
         ||
         (VIsual_active && cap->cmdchar == ':' && oap->op_type != OP_COLON)) &&
        cap->cmdchar != 'D'
#ifdef FEAT_FOLDING
        && oap->op_type != OP_FOLD && oap->op_type != OP_FOLDOPEN &&
        oap->op_type != OP_FOLDOPENREC && oap->op_type != OP_FOLDCLOSE &&
        oap->op_type != OP_FOLDCLOSEREC && oap->op_type != OP_FOLDDEL &&
        oap->op_type != OP_FOLDDELREC
#endif
    )
    {
      prep_redo(oap->regname, cap->count0, get_op_char(oap->op_type),
                get_extra_op_char(oap->op_type), oap->motion_force,
                cap->cmdchar, cap->nchar);
      if (cap->cmdchar == '/' || cap->cmdchar == '?') /* was a search */
      {
        /*
         * If 'cpoptions' does not contain 'r', insert the search
         * pattern to really repeat the same command.
         */
        if (vim_strchr(p_cpo, CPO_REDO) == NULL)
          AppendToRedobuffLit(cap->searchbuf, -1);
        AppendToRedobuff(NL_STR);
      }
      else if (cap->cmdchar == ':')
      {
        /* do_cmdline() has stored the first typed line in
         * "repeat_cmdline".  When several lines are typed repeating
         * won't be possible. */
        if (repeat_cmdline == NULL)
          ResetRedobuff();
        else
        {
          AppendToRedobuffLit(repeat_cmdline, -1);
          AppendToRedobuff(NL_STR);
          VIM_CLEAR(repeat_cmdline);
        }
      }
    }

    if (redo_VIsual_busy)
    {
      /* Redo of an operation on a Visual area. Use the same size from
       * redo_VIsual_line_count and redo_VIsual_vcol. */
      oap->start = curwin->w_cursor;
      curwin->w_cursor.lnum += redo_VIsual_line_count - 1;
      if (curwin->w_cursor.lnum > curbuf->b_ml.ml_line_count)
        curwin->w_cursor.lnum = curbuf->b_ml.ml_line_count;
      VIsual_mode = redo_VIsual_mode;
      if (redo_VIsual_vcol == MAXCOL || VIsual_mode == 'v')
      {
        if (VIsual_mode == 'v')
        {
          if (redo_VIsual_line_count <= 1)
          {
            validate_virtcol();
            curwin->w_curswant = curwin->w_virtcol + redo_VIsual_vcol - 1;
          }
          else
            curwin->w_curswant = redo_VIsual_vcol;
        }
        else
        {
          curwin->w_curswant = MAXCOL;
        }
        coladvance(curwin->w_curswant);
      }
      cap->count0 = redo_VIsual_count;
      if (redo_VIsual_count != 0)
        cap->count1 = redo_VIsual_count;
      else
        cap->count1 = 1;
    }
    else if (VIsual_active)
    {
      if (!gui_yank)
      {
        /* Save the current VIsual area for '< and '> marks, and "gv" */
        curbuf->b_visual.vi_start = VIsual;
        curbuf->b_visual.vi_end = curwin->w_cursor;
        curbuf->b_visual.vi_mode = VIsual_mode;
        if (VIsual_mode_orig != NUL)
        {
          curbuf->b_visual.vi_mode = VIsual_mode_orig;
          VIsual_mode_orig = NUL;
        }
        curbuf->b_visual.vi_curswant = curwin->w_curswant;
#ifdef FEAT_EVAL
        curbuf->b_visual_mode_eval = VIsual_mode;
#endif
      }

      /* In Select mode, a linewise selection is operated upon like a
       * characterwise selection.
       * Special case: gH<Del> deletes the last line. */
      if (VIsual_select && VIsual_mode == 'V' &&
          cap->oap->op_type != OP_DELETE)
      {
        if (LT_POS(VIsual, curwin->w_cursor))
        {
          VIsual.col = 0;
          curwin->w_cursor.col = (colnr_T)STRLEN(ml_get(curwin->w_cursor.lnum));
        }
        else
        {
          curwin->w_cursor.col = 0;
          VIsual.col = (colnr_T)STRLEN(ml_get(VIsual.lnum));
        }
        VIsual_mode = 'v';
      }
      /* If 'selection' is "exclusive", backup one character for
       * charwise selections. */
      else if (VIsual_mode == 'v')
        include_line_break = unadjust_for_sel();

      oap->start = VIsual;

      if (VIsual_mode == 'V')
      {
        oap->start.col = 0;
        oap->start.coladd = 0;
      }
    }

    /*
     * Set oap->start to the first position of the operated text, oap->end
     * to the end of the operated text.  w_cursor is equal to oap->start.
     */
    if (LT_POS(oap->start, curwin->w_cursor))
    {
#ifdef FEAT_FOLDING
      /* Include folded lines completely. */
      if (!VIsual_active)
      {
        if (hasFolding(oap->start.lnum, &oap->start.lnum, NULL))
          oap->start.col = 0;
        if (hasFolding(curwin->w_cursor.lnum, NULL, &curwin->w_cursor.lnum))
          curwin->w_cursor.col = (colnr_T)STRLEN(ml_get_curline());
      }
#endif
      oap->end = curwin->w_cursor;
      curwin->w_cursor = oap->start;

      /* w_virtcol may have been updated; if the cursor goes back to its
       * previous position w_virtcol becomes invalid and isn't updated
       * automatically. */
      curwin->w_valid &= ~VALID_VIRTCOL;
    }
    else
    {
#ifdef FEAT_FOLDING
      /* Include folded lines completely. */
      if (!VIsual_active && oap->motion_type == MLINE)
      {
        if (hasFolding(curwin->w_cursor.lnum, &curwin->w_cursor.lnum, NULL))
          curwin->w_cursor.col = 0;
        if (hasFolding(oap->start.lnum, NULL, &oap->start.lnum))
          oap->start.col = (colnr_T)STRLEN(ml_get(oap->start.lnum));
      }
#endif
      oap->end = oap->start;
      oap->start = curwin->w_cursor;
    }

    /* Just in case lines were deleted that make the position invalid. */
    check_pos(curwin->w_buffer, &oap->end);
    oap->line_count = oap->end.lnum - oap->start.lnum + 1;

    /* Set "virtual_op" before resetting VIsual_active. */
    virtual_op = virtual_active();

    if (VIsual_active || redo_VIsual_busy)
    {
      get_op_vcol(oap, redo_VIsual_vcol, TRUE);

      if (!redo_VIsual_busy && !gui_yank)
      {
        /*
         * Prepare to reselect and redo Visual: this is based on the
         * size of the Visual text
         */
        resel_VIsual_mode = VIsual_mode;
        if (curwin->w_curswant == MAXCOL)
          resel_VIsual_vcol = MAXCOL;
        else
        {
          if (VIsual_mode != Ctrl_V)
            getvvcol(curwin, &(oap->end), NULL, NULL, &oap->end_vcol);
          if (VIsual_mode == Ctrl_V || oap->line_count <= 1)
          {
            if (VIsual_mode != Ctrl_V)
              getvvcol(curwin, &(oap->start), &oap->start_vcol, NULL, NULL);
            resel_VIsual_vcol = oap->end_vcol - oap->start_vcol + 1;
          }
          else
            resel_VIsual_vcol = oap->end_vcol;
        }
        resel_VIsual_line_count = oap->line_count;
      }

      /* can't redo yank (unless 'y' is in 'cpoptions') and ":" */
      if ((redo_yank || oap->op_type != OP_YANK) && oap->op_type != OP_COLON
#ifdef FEAT_FOLDING
          && oap->op_type != OP_FOLD && oap->op_type != OP_FOLDOPEN &&
          oap->op_type != OP_FOLDOPENREC && oap->op_type != OP_FOLDCLOSE &&
          oap->op_type != OP_FOLDCLOSEREC && oap->op_type != OP_FOLDDEL &&
          oap->op_type != OP_FOLDDELREC
#endif
          && oap->motion_force == NUL)
      {
        /* Prepare for redoing.  Only use the nchar field for "r",
         * otherwise it might be the second char of the operator. */
        if (cap->cmdchar == 'g' && (cap->nchar == 'n' || cap->nchar == 'N'))
          prep_redo(oap->regname, cap->count0, get_op_char(oap->op_type),
                    get_extra_op_char(oap->op_type), oap->motion_force,
                    cap->cmdchar, cap->nchar);
        else if (cap->cmdchar != ':')
        {
          int nchar = oap->op_type == OP_REPLACE ? cap->nchar : NUL;

          /* reverse what nv_replace() did */
          if (nchar == REPLACE_CR_NCHAR)
            nchar = CAR;
          else if (nchar == REPLACE_NL_NCHAR)
            nchar = NL;
          prep_redo(oap->regname, 0L, NUL, 'v', get_op_char(oap->op_type),
                    get_extra_op_char(oap->op_type), nchar);
        }
        if (!redo_VIsual_busy)
        {
          redo_VIsual_mode = resel_VIsual_mode;
          redo_VIsual_vcol = resel_VIsual_vcol;
          redo_VIsual_line_count = resel_VIsual_line_count;
          redo_VIsual_count = cap->count0;
          redo_VIsual_arg = cap->arg;
        }
      }

      /*
       * oap->inclusive defaults to TRUE.
       * If oap->end is on a NUL (empty line) oap->inclusive becomes
       * FALSE.  This makes "d}P" and "v}dP" work the same.
       */
      if (oap->motion_force == NUL || oap->motion_type == MLINE)
        oap->inclusive = TRUE;
      if (VIsual_mode == 'V')
        oap->motion_type = MLINE;
      else
      {
        oap->motion_type = MCHAR;
        if (VIsual_mode != Ctrl_V && *ml_get_pos(&(oap->end)) == NUL &&
            (include_line_break || !virtual_op))
        {
          oap->inclusive = FALSE;
          /* Try to include the newline, unless it's an operator
           * that works on lines only. */
          if (*p_sel != 'o' && !op_on_lines(oap->op_type) &&
              oap->end.lnum < curbuf->b_ml.ml_line_count)
          {
            ++oap->end.lnum;
            oap->end.col = 0;
            oap->end.coladd = 0;
            ++oap->line_count;
          }
        }
      }

      redo_VIsual_busy = FALSE;

      /*
       * Switch Visual off now, so screen updating does
       * not show inverted text when the screen is redrawn.
       * With OP_YANK and sometimes with OP_COLON and OP_FILTER there is
       * no screen redraw, so it is done here to remove the inverted
       * part.
       */
      if (!gui_yank)
      {
        VIsual_active = FALSE;
        may_clear_cmdline();
        if ((oap->op_type == OP_YANK || oap->op_type == OP_COLON ||
             oap->op_type == OP_FUNCTION || oap->op_type == OP_FILTER) &&
            oap->motion_force == NUL)
        {
#ifdef FEAT_LINEBREAK
          /* make sure redrawing is correct */
          curwin->w_p_lbr = lbr_saved;
#endif
          redraw_curbuf_later(INVERTED);
        }
      }
    }

    /* Include the trailing byte of a multi-byte char. */
    if (has_mbyte && oap->inclusive)
    {
      int l;

      l = (*mb_ptr2len)(ml_get_pos(&oap->end));
      if (l > 1)
        oap->end.col += l - 1;
    }
    curwin->w_set_curswant = TRUE;

    /*
     * oap->empty is set when start and end are the same.  The inclusive
     * flag affects this too, unless yanking and the end is on a NUL.
     */
    oap->empty = (oap->motion_type == MCHAR &&
                  (!oap->inclusive ||
                   (oap->op_type == OP_YANK && gchar_pos(&oap->end) == NUL)) &&
                  EQUAL_POS(oap->start, oap->end) &&
                  !(virtual_op && oap->start.coladd != oap->end.coladd));
    /*
     * For delete, change and yank, it's an error to operate on an
     * empty region, when 'E' included in 'cpoptions' (Vi compatible).
     */
    empty_region_error =
        (oap->empty && vim_strchr(p_cpo, CPO_EMPTYREGION) != NULL);

    /* Force a redraw when operating on an empty Visual region, when
     * 'modifiable is off or creating a fold. */
    if (oap->is_VIsual && (oap->empty || !curbuf->b_p_ma
#ifdef FEAT_FOLDING
                           || oap->op_type == OP_FOLD
#endif
                           ))
    {
#ifdef FEAT_LINEBREAK
      curwin->w_p_lbr = lbr_saved;
#endif
      redraw_curbuf_later(INVERTED);
    }

    /*
     * If the end of an operator is in column one while oap->motion_type
     * is MCHAR and oap->inclusive is FALSE, we put op_end after the last
     * character in the previous line. If op_start is on or before the
     * first non-blank in the line, the operator becomes linewise
     * (strange, but that's the way vi does it).
     */
    if (oap->motion_type == MCHAR && oap->inclusive == FALSE &&
        !(cap->retval & CA_NO_ADJ_OP_END) && oap->end.col == 0 &&
        (!oap->is_VIsual || *p_sel == 'o') && !oap->block_mode &&
        oap->line_count > 1)
    {
      oap->end_adjusted = TRUE; /* remember that we did this */
      --oap->line_count;
      --oap->end.lnum;
      if (inindent(0))
        oap->motion_type = MLINE;
      else
      {
        oap->end.col = (colnr_T)STRLEN(ml_get(oap->end.lnum));
        if (oap->end.col)
        {
          --oap->end.col;
          oap->inclusive = TRUE;
        }
      }
    }
    else
      oap->end_adjusted = FALSE;

    switch (oap->op_type)
    {
    case OP_LSHIFT:
    case OP_RSHIFT:
      op_shift(oap, TRUE, oap->is_VIsual ? (int)cap->count1 : 1);
      auto_format(FALSE, TRUE);
      break;

    case OP_JOIN_NS:
    case OP_JOIN:
      if (oap->line_count < 2)
        oap->line_count = 2;
      if (curwin->w_cursor.lnum + oap->line_count - 1 >
          curbuf->b_ml.ml_line_count)
        beep_flush();
      else
      {
        (void)do_join(oap->line_count, oap->op_type == OP_JOIN, TRUE, TRUE,
                      TRUE);
        auto_format(FALSE, TRUE);
      }
      break;

    case OP_DELETE:
      VIsual_reselect = FALSE; /* don't reselect now */
      if (empty_region_error)
      {
        vim_beep(BO_OPER);
        CancelRedo();
      }
      else
      {
        (void)op_delete(oap);
        if (oap->motion_type == MLINE && has_format_option(FO_AUTO))
          u_save_cursor(); /* cursor line wasn't saved yet */
        auto_format(FALSE, TRUE);
      }
      break;

    case OP_YANK:
      if (empty_region_error)
      {
        if (!gui_yank)
        {
          vim_beep(BO_OPER);
          CancelRedo();
        }
      }
      else
      {
#ifdef FEAT_LINEBREAK
        curwin->w_p_lbr = lbr_saved;
#endif
        (void)op_yank(oap, FALSE, !gui_yank);
      }
      check_cursor_col();
      break;

    case OP_CHANGE:
      VIsual_reselect = FALSE; /* don't reselect now */
      if (empty_region_error)
      {
        vim_beep(BO_OPER);
        CancelRedo();
      }
      else
      {
        /* This is a new edit command, not a restart.  Need to
         * remember it to make 'insertmode' work with mappings for
         * Visual mode.  But do this only once and not when typed and
         * 'insertmode' isn't set. */
        if (p_im || !KeyTyped)
          restart_edit_save = restart_edit;
        else
          restart_edit_save = 0;
        restart_edit = 0;
#ifdef FEAT_LINEBREAK
        /* Restore linebreak, so that when the user edits it looks as
         * before. */
        if (curwin->w_p_lbr != lbr_saved)
        {
          curwin->w_p_lbr = lbr_saved;
          get_op_vcol(oap, redo_VIsual_mode, FALSE);
        }
#endif
        /* Reset finish_op now, don't want it set inside edit(). */
        finish_op = FALSE;

        // TODO: Libvim?
        /* if (op_change(oap)) /1* will call edit() *1/ */
        /*   cap->retval |= CA_COMMAND_BUSY; */

        sm_push_change(oap);
        restart_edit = 0;

        // TODO: Libvim?
        /* TODO: Set this on return? */
        /* if (restart_edit == 0) */
        /*   restart_edit = restart_edit_save; */
        return;
      }
      break;

    case OP_FILTER:
      if (vim_strchr(p_cpo, CPO_FILTER) != NULL)
        AppendToRedobuff((char_u *)"!\r"); /* use any last used !cmd */
      else
        bangredo = TRUE; /* do_bang() will put cmd in redo buffer */
                         /* FALLTHROUGH */

    case OP_INDENT:
      if (formatCallback != NULL)
      {
        formatRequest_T formatRequest;
        formatRequest.formatType = INDENTATION;
        formatRequest.returnCursor = 0;
        formatRequest.start = oap->start;
        formatRequest.end = oap->end;
        formatRequest.buf = curbuf;
        formatRequest.cmd = get_equalprg();

        formatCallback(&formatRequest);
      }
      break;
    case OP_COLON:
      op_colon(oap);
      break;

    case OP_TILDE:
    case OP_UPPER:
    case OP_LOWER:
    case OP_ROT13:
      if (empty_region_error)
      {
        vim_beep(BO_OPER);
        CancelRedo();
      }
      else
        op_tilde(oap);
      check_cursor_col();
      break;

    case OP_FORMAT:
#if defined(FEAT_EVAL)
      if (*curbuf->b_p_fex != NUL)
        op_formatexpr(oap); /* use expression */
      else
#endif
          if (formatCallback != NULL)
      {

        char_u *cmd = curbuf->b_p_fp;
        if (*cmd == NUL)
        {
          cmd = p_fp;
        }

        formatRequest_T formatRequest;
        formatRequest.formatType = FORMATTING;
        formatRequest.returnCursor = 0;
        formatRequest.start = oap->start;
        formatRequest.end = oap->end;
        formatRequest.buf = curbuf;
        formatRequest.cmd = cmd;

        formatCallback(&formatRequest);
      }
      break;

    case OP_FORMAT2:
      if (formatCallback != NULL)
      {
        char_u *cmd = curbuf->b_p_fp;
        if (*cmd == NUL)
        {
          cmd = p_fp;
        }

        formatRequest_T formatRequest;
        formatRequest.formatType = FORMATTING;
        formatRequest.returnCursor = 1;
        formatRequest.start = oap->start;
        formatRequest.end = oap->end;
        formatRequest.buf = curbuf;
        formatRequest.cmd = cmd;

        formatCallback(&formatRequest);
      }
      break;

    case OP_FUNCTION:
#ifdef FEAT_LINEBREAK
      /* Restore linebreak, so that when the user edits it looks as
       * before. */
      curwin->w_p_lbr = lbr_saved;
#endif
      op_function(oap); /* call 'operatorfunc' */
      break;

    case OP_INSERT:
    case OP_APPEND:
      VIsual_reselect = FALSE; /* don't reselect now */
      if (empty_region_error)
      {
        vim_beep(BO_OPER);
        CancelRedo();
      }
      else
      {
        /* This is a new edit command, not a restart.  Need to
         * remember it to make 'insertmode' work with mappings for
         * Visual mode.  But do this only once. */
        restart_edit_save = restart_edit;
        restart_edit = 0;
#ifdef FEAT_LINEBREAK
        /* Restore linebreak, so that when the user edits it looks as
         * before. */
        if (curwin->w_p_lbr != lbr_saved)
        {
          curwin->w_p_lbr = lbr_saved;
          get_op_vcol(oap, redo_VIsual_mode, FALSE);
        }
#endif
        op_insert(oap, cap->count1);
#ifdef FEAT_LINEBREAK
        /* Reset linebreak, so that formatting works correctly. */
        curwin->w_p_lbr = FALSE;
#endif

        /* TODO: when inserting in several lines, should format all
         * the lines. */
        auto_format(FALSE, TRUE);

        if (restart_edit == 0)
          restart_edit = restart_edit_save;
        else
          cap->retval |= CA_COMMAND_BUSY;
      }
      break;

    case OP_REPLACE:
      VIsual_reselect = FALSE; /* don't reselect now */
      if (empty_region_error)
      {
        vim_beep(BO_OPER);
        CancelRedo();
      }
      else
      {
#ifdef FEAT_LINEBREAK
        /* Restore linebreak, so that when the user edits it looks as
         * before. */
        if (curwin->w_p_lbr != lbr_saved)
        {
          curwin->w_p_lbr = lbr_saved;
          get_op_vcol(oap, redo_VIsual_mode, FALSE);
        }
#endif
        op_replace(oap, cap->nchar);
      }
      break;

#ifdef FEAT_FOLDING
    case OP_FOLD:
      VIsual_reselect = FALSE; /* don't reselect now */
      foldCreate(oap->start.lnum, oap->end.lnum);
      break;

    case OP_FOLDOPEN:
    case OP_FOLDOPENREC:
    case OP_FOLDCLOSE:
    case OP_FOLDCLOSEREC:
      VIsual_reselect = FALSE; /* don't reselect now */
      opFoldRange(oap->start.lnum, oap->end.lnum,
                  oap->op_type == OP_FOLDOPEN || oap->op_type == OP_FOLDOPENREC,
                  oap->op_type == OP_FOLDOPENREC ||
                      oap->op_type == OP_FOLDCLOSEREC,
                  oap->is_VIsual);
      break;

    case OP_FOLDDEL:
    case OP_FOLDDELREC:
      VIsual_reselect = FALSE; /* don't reselect now */
      deleteFold(oap->start.lnum, oap->end.lnum, oap->op_type == OP_FOLDDELREC,
                 oap->is_VIsual);
      break;
#endif
    case OP_NR_ADD:
    case OP_NR_SUB:
      if (empty_region_error)
      {
        vim_beep(BO_OPER);
        CancelRedo();
      }
      else
      {
        VIsual_active = TRUE;
#ifdef FEAT_LINEBREAK
        curwin->w_p_lbr = lbr_saved;
#endif
        op_addsub(oap, cap->count1, redo_VIsual_arg);
        VIsual_active = FALSE;
      }
      check_cursor_col();
      break;

    case OP_COMMENT:
      toggle_comment_lines(oap->start.lnum, oap->end.lnum);
      break;

    default:
      clearopbeep(oap);
    }
    virtual_op = MAYBE;
    if (!gui_yank)
    {
      /*
       * if 'sol' not set, go back to old column for some commands
       */
      if (!p_sol && oap->motion_type == MLINE && !oap->end_adjusted &&
          (oap->op_type == OP_LSHIFT || oap->op_type == OP_RSHIFT ||
           oap->op_type == OP_DELETE))
      {
#ifdef FEAT_LINEBREAK
        curwin->w_p_lbr = FALSE;
#endif
        coladvance(curwin->w_curswant = old_col);
      }
    }
    else
    {
      curwin->w_cursor = old_cursor;
    }
    oap->block_mode = FALSE;
    clearop(oap);
    motion_force = NUL;
  }
#ifdef FEAT_LINEBREAK
  curwin->w_p_lbr = lbr_saved;
#endif
}

/*
 * Handle indent and format operators and visual mode ":".
 */
static void op_colon(oparg_T *oap)
{
  stuffcharReadbuff(':');
  if (oap->is_VIsual)
    stuffReadbuff((char_u *)"'<,'>");
  else
  {
    /*
     * Make the range look nice, so it can be repeated.
     */
    if (oap->start.lnum == curwin->w_cursor.lnum)
      stuffcharReadbuff('.');
    else
      stuffnumReadbuff((long)oap->start.lnum);
    if (oap->end.lnum != oap->start.lnum)
    {
      stuffcharReadbuff(',');
      if (oap->end.lnum == curwin->w_cursor.lnum)
        stuffcharReadbuff('.');
      else if (oap->end.lnum == curbuf->b_ml.ml_line_count)
        stuffcharReadbuff('$');
      else if (oap->start.lnum == curwin->w_cursor.lnum)
      {
        stuffReadbuff((char_u *)".+");
        stuffnumReadbuff((long)oap->line_count - 1);
      }
      else
        stuffnumReadbuff((long)oap->end.lnum);
    }
  }
  if (oap->op_type != OP_COLON)
    stuffReadbuff((char_u *)"!");
  if (oap->op_type == OP_INDENT)
  {
    if (*get_equalprg() == NUL)
      stuffReadbuff((char_u *)"indent");
    else
      stuffReadbuff(get_equalprg());
    stuffReadbuff((char_u *)"\n");
  }
  else if (oap->op_type == OP_FORMAT)
  {
    if (*curbuf->b_p_fp != NUL)
      stuffReadbuff(curbuf->b_p_fp);
    else if (*p_fp != NUL)
      stuffReadbuff(p_fp);
    else
      stuffReadbuff((char_u *)"fmt");
    stuffReadbuff((char_u *)"\n']");
  }

  /*
   * do_cmdline() does the rest
   */
}

/*
 * Handle the "g@" operator: call 'operatorfunc'.
 */
static void op_function(oparg_T *oap UNUSED)
{
#ifdef FEAT_EVAL
  typval_T argv[2];
  int save_virtual_op = virtual_op;

  if (*p_opfunc == NUL)
    emsg(_("E774: 'operatorfunc' is empty"));
  else
  {
    /* Set '[ and '] marks to text to be operated on. */
    curbuf->b_op_start = oap->start;
    curbuf->b_op_end = oap->end;
    if (oap->motion_type != MLINE && !oap->inclusive)
      /* Exclude the end position. */
      decl(&curbuf->b_op_end);

    argv[0].v_type = VAR_STRING;
    if (oap->block_mode)
      argv[0].vval.v_string = (char_u *)"block";
    else if (oap->motion_type == MLINE)
      argv[0].vval.v_string = (char_u *)"line";
    else
      argv[0].vval.v_string = (char_u *)"char";
    argv[1].v_type = VAR_UNKNOWN;

    /* Reset virtual_op so that 'virtualedit' can be changed in the
     * function. */
    virtual_op = MAYBE;

    (void)call_func_retnr(p_opfunc, 1, argv);

    virtual_op = save_virtual_op;
  }
#else
  emsg(_("E775: Eval feature not available"));
#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)
{
  VIsual_active = FALSE;
  /* 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;
  }
}

/*
 * 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 string
 * FIND_IDENT + FIND_STRING: find any non-white string, identifier preferred.
 * FIND_EVAL:	 find text useful for C program debugging
 *
 * There are three steps:
 * 1. Search forward for the start of an identifier/string.  Doesn't move if
 *    already on one.
 * 2. Search backward for the start of this identifier/string.
 *    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/string.
 *    When FIND_IDENT isn't defined, we backup until a blank.
 *
 * Returns the length of the string, or zero if no string is found.
 * If a string is found, a pointer to the string is put in "*string".  This
 * string is not always NUL terminated.
 */
int find_ident_under_cursor(char_u **string, int find_type)
{
  return find_ident_at_pos(curwin, curwin->w_cursor.lnum, curwin->w_cursor.col,
                           string, 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 **string, 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 string
   */
  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/string
     */
    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/string.
     */
    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 string, 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 string, 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 string
    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;
  *string = ptr;

  /*
   * 3. Find the end if the identifier/string.
   */
  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.
 */
static 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;
}

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

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

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

/*
 * 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;
  gotoRequest_T gotoRequest;

  gotoRequest.location = curwin->w_cursor;
  gotoRequest.target = nchar == 'd' ? DEFINITION : DECLARATION;
  int handled = 0;

  if (gotoCallback != NULL)
  {
    handled = gotoCallback(gotoRequest);
  }

  if (!handled)
  {
    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
  }
}

static void nv_goto_outline(oparg_T *oap)
{
  clearopbeep(oap);
  gotoRequest_T gotoRequest;
  gotoRequest.location = curwin->w_cursor;
  gotoRequest.target = OUTLINE;

  if (gotoCallback != NULL)
  {
    gotoCallback(gotoRequest);
  }
}

/*
 * 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, (linenr_T)0, NULL, 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;
    }
#ifdef FEAT_COMMENTS
    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;
    }
#endif
    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 retval = OK;
  int atend = FALSE;

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

  if (curwin->w_curswant == MAXCOL)
  {
    atend = TRUE;
  }

  linenr_T destinationLnum = curwin->w_cursor.lnum;
  colnr_T destColumn = curwin->w_curswant;

  if (cursorMoveScreenPositionCallback != NULL)
  {
    cursorMoveScreenPositionCallback(
        dir,
        dist,
        curwin->w_cursor.lnum,
        curwin->w_cursor.col,
        curwin->w_curswant,
        &destinationLnum,
        &destColumn);
    curwin->w_cursor.lnum = destinationLnum;
    curwin->w_curswant = destColumn;
    coladvance(curwin->w_curswant);

    if (atend)
    {
      curwin->w_curswant = MAXCOL;
    }
  }
  else
  {
    retval = FAIL;
  }

  return retval;
}

/*
 * Handle CTRL-E and CTRL-Y commands: scroll a line up or down.
 * cap->arg must be TRUE for CTRL-E.
 */
static 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)
{
  if (up)
    scrollup(count, TRUE);
  else
    scrolldown(count, TRUE);
}

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

  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);
    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);
    break;

    /* "zH" - scroll screen right half-page */
  case 'H':
    if (scrollCallback != NULL)
    {
      scrollCallback(SCROLL_HALFPAGE_RIGHT, cap->count1);
    }
    break;

    /* "zh" - scroll screen to the right */
  case 'h':
  case K_LEFT:
    if (scrollCallback != NULL)
    {
      scrollCallback(SCROLL_COLUMN_RIGHT, cap->count1);
    }
    break;

    /* "zL" - scroll screen left half-page */
  case 'L':
    if (scrollCallback != NULL)
    {
      scrollCallback(SCROLL_HALFPAGE_LEFT, cap->count1);
    }
    break;

    /* "zl" - scroll screen to the left */
  case 'l':
  case K_RIGHT:
    if (scrollCallback != NULL)
    {
      scrollCallback(SCROLL_COLUMN_LEFT, cap->count1);
    }
    break;

    /* "zs" - scroll screen, cursor at the start */
  case 's':
    if (scrollCallback != NULL)
    {
      scrollCallback(SCROLL_CURSOR_LEFT, 1);
    }
    break;

    /* "ze" - scroll screen, cursor at the end */
  case 'e':
    if (scrollCallback != NULL)
    {
      scrollCallback(SCROLL_CURSOR_RIGHT, 1);
    }
    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 */

  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
}

/*
 * Handle a ":" command.
 */
static void nv_colon(cmdarg_T *cap)
{
  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();

    sm_push_cmdline(':', 0, 0);
  }
}

/*
 * Handle CTRL-G command.
 */
static void nv_ctrlg(cmdarg_T *cap)
{
  if (VIsual_active) /* toggle Selection/Visual mode */
  {
    VIsual_select = !VIsual_select;
  }
  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))
  {
#if defined(__BEOS__) && !USE_THREAD_FOR_INPUT_WITH_TIMEOUT
    /*
     * Right now, the BeBox doesn't seem to have an easy way to detect
     * window resizing, so we cheat and make the user detect it
     * manually with CTRL-L instead
     */
    ui_get_shellsize();
#endif
    redraw_later(CLEAR);
#if defined(MSWIN)
    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;
    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);
  vim_memset(&ca, 0, sizeof(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
        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, "\\>");
#ifdef FEAT_CMDHIST
    /* put pattern in search history */
    init_history();
    add_to_history(HIST_SEARCH, buf, TRUE, NUL);
#endif
    (void)normal_search(cap, cmdchar == '*' ? '/' : '?', buf, 0);
  }
  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;
  //  int half;

  cap->oap->motion_type = MLINE;
  setpcmark();
  linenr_T destinationCursor = curwin->w_cursor.lnum;

  if (cap->cmdchar == 'L')
  {
    if (cursorMoveScreenLineCallback != NULL)
    {
      cursorMoveScreenLineCallback(
          MOTION_L,
          cap->count1,
          curwin->w_cursor.lnum,
          &destinationCursor);
    }
  }
  else
  {
    if (cap->cmdchar == 'M')
    {
      if (cursorMoveScreenLineCallback != NULL)
      {
        cursorMoveScreenLineCallback(
            MOTION_M,
            cap->count1,
            curwin->w_cursor.lnum,
            &destinationCursor);
      }
    }
    else /* (cap->cmdchar == 'H') */
    {
      if (cursorMoveScreenLineCallback != NULL)
      {
        cursorMoveScreenLineCallback(
            MOTION_H,
            cap->count1,
            curwin->w_cursor.lnum,
            &destinationCursor);
      }
    }
  }

  if (destinationCursor < 1)
  {
    destinationCursor = 1;
  }
  else if (destinationCursor > curbuf->b_ml.ml_line_count)
  {
    destinationCursor = curbuf->b_ml.ml_line_count;
  }

  curwin->w_cursor.lnum = destinationCursor;
  /* Correct for 'so', except when an operator is pending. */
  // LIBVIM: Todo - where should this be handled?
  //  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_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;
  }

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

  sm_push_cmdline(cap->cmdchar, cap->count1, 0);
}

/*
 * 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 i = normal_search(cap, 0, NULL, SEARCH_MARK | cap->arg);

  if (i == 1 && 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);
    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 i;

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

  i = do_search(cap->oap, dir, pat, cap->count1,
                opt | SEARCH_OPT | SEARCH_ECHO | SEARCH_MSG, NULL, NULL);
  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);
  }

#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

  /* 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;
      }

      /* 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;

  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;
  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)
      {
        ++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;
    }
  }

  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;" and "g," 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 == '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;
    }
    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');
      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)
{
  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 hilighting.
  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

  if (p_smd && msg_silent == 0)
    redraw_cmdline = TRUE; /* show visual mode later */

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

  /*
   * libvim: gh shows 'hover' UI
   * "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:
    if (gotoCallback != NULL)
    {
      gotoRequest_T gotoRequest;
      gotoRequest.location = curwin->w_cursor;
      gotoRequest.target = HOVER;

      gotoCallback(gotoRequest);
    }
    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:
    i = nv_screengo(oap, FORWARD, cap->count1);
    if (i == FAIL)
      clearopbeep(oap);
    break;

  case 'k':
  case K_UP:
    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 '_':
    /* "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
    {
      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 '@':
  case 'c':
    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;

  case 'O':
    nv_goto_outline(oap);
    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

#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 '+':
  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)
{

  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,
#ifdef FEAT_COMMENTS
                  has_format_option(FO_OPEN_COMS) ? OPENLINE_DO_COM :
#endif
                                                  0,
                  0) == OK)
    {
      /* 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 OR 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;
  }
}

/*
 * Handle "c" command.
 */
static void nv_c(cmdarg_T *cap)
{
  /* In Visual mode AND typing "gcc" triggers an operator */
  if (cap->oap->op_type == OP_COMMENT)
  {
    /* translate "gcc" to "gcgc" */
    cap->cmdchar = 'g';
    cap->nchar = 'c';
  }

  nv_operator(cap);
}

/*
 * '~' 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.
 */
static 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;
    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 && !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;
  }

  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)
  {
    if (unhandledEscapeCallback != NULL)
    {
      unhandledEscapeCallback();
    }
  }
  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';
}

/*
 * 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';

  int was_visual_block = 0;
  /* 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
    // Block 'I'insert or 'A'ppend - special case to produce multiple cursors
    if (VIsual_mode == Ctrl_V)
    {
      was_visual_block = 1;
      int minCol = VIsual.col;
      if (minCol > curwin->w_cursor.col)
      {
        minCol = curwin->w_cursor.col;
      }

      // If 'A' was used, jump to next character
      if (cap->cmdchar == 'A')
      {
        inc_cursor();
        minCol = curwin->w_cursor.col;
      }

      int vcol = getviscol();

      curbuf->b_visual.vi_mode = VIsual_mode;
      curbuf->b_visual.vi_start = VIsual;
      curbuf->b_visual.vi_end = curwin->w_cursor;

      int start = VIsual.lnum < curwin->w_cursor.lnum ? VIsual.lnum : curwin->w_cursor.lnum;
      int end = VIsual.lnum > curwin->w_cursor.lnum ? VIsual.lnum : curwin->w_cursor.lnum;

      int inclusive = curwin->w_cursor.lnum > VIsual.lnum;
      int stop = inclusive ? end : end + 1;
      int initial = inclusive ? start : start + 1;

      pos_T originalPos = curwin->w_cursor;

      for (int i = initial; i < stop; i++)
      {
        int lnum = i;

        // Try to advance to virtual column
        curwin->w_cursor.lnum = lnum;
        curwin->w_cursor.col = 0;

        pos_T pos;
        pos.lnum = lnum;
        pos.col = 0;
        if (getvpos(&pos, vcol))
        {
          if (cursorAddCallback != NULL)
          {
            cursorAddCallback(pos);
          }
        }
      }

      end_visual_mode();
      // end_visual_mode may adjust cursor position; but we want to persist it - so restore after.
      curwin->w_cursor = originalPos;
      clearop(cap->oap);
      invoke_edit(cap, FALSE, cap->cmdchar, FALSE);
    }
    else
    {
      // Not block - default to original Vim behavior:
      end_visual_mode();
      clearop(cap->oap);
      //v_visop(cap);
    }
  }

  /* in Visual mode and after an operator "a" and "i" are for text objects */
  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 (!was_visual_block && !checkclearopq(cap->oap))
  {
    switch (cap->cmdchar)
    {
    case 'A': /* "A"ppend after the line */
      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());
      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. */

  /* libvim TODO: Bring back restart_edit & restart_edit save */

  /* if (repl || !stuff_empty())
    restart_edit_save = restart_edit;
  else
    restart_edit_save = 0; */

  /* Always reset "restart_edit", this is not a restarted edit. */

  /* libvim TODO: Bring back */
  /* restart_edit = 0; */

  sm_push_insert(cmd, startln, cap->count1);

  /* 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))
  {
    /* (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;
      adjust_clip_reg(&regname);
      if (regname == 0 || regname == '"' || VIM_ISDIGIT(regname) ||
          regname == '-' || (clip_unnamed && (regname == '*' || regname == '+')))
      {
        /* 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. */
      cap->cmdchar = 'd';
      cap->nchar = NUL;
      cap->oap->regname = NUL;
      nv_operator(cap);
      do_pending_operator(cap, 0, FALSE);
      empty = (curbuf->b_ml.ml_flags & ML_EMPTY);

      /* 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(curbuf->b_ml.ml_line_count, TRUE);

      /* 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);
}

/*
 * 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 */
}

/*
 * Calculate start/end virtual columns for operating in block mode.
 */
static void
get_op_vcol(oparg_T *oap, colnr_T redo_VIsual_vcol,
            int initial) /* when TRUE adjust position for 'selectmode' */
{
  colnr_T start, end;

  if (VIsual_mode != Ctrl_V || (!initial && oap->end.col < curwin->w_width))
    return;

  oap->block_mode = TRUE;

  /* prevent from moving onto a trail byte */
  if (has_mbyte)
    mb_adjustpos(curwin->w_buffer, &oap->end);

  getvvcol(curwin, &(oap->start), &oap->start_vcol, NULL, &oap->end_vcol);

  if (!redo_VIsual_busy)
  {
    getvvcol(curwin, &(oap->end), &start, NULL, &end);

    if (start < oap->start_vcol)
      oap->start_vcol = start;
    if (end > oap->end_vcol)
    {
      if (initial && *p_sel == 'e' && start >= 1 && start - 1 >= oap->end_vcol)
        oap->end_vcol = start - 1;
      else
        oap->end_vcol = end;
    }
  }

  /* if '$' was used, get oap->end_vcol from longest line */
  if (curwin->w_curswant == MAXCOL)
  {
    curwin->w_cursor.col = MAXCOL;
    oap->end_vcol = 0;
    for (curwin->w_cursor.lnum = oap->start.lnum;
         curwin->w_cursor.lnum <= oap->end.lnum; ++curwin->w_cursor.lnum)
    {
      getvvcol(curwin, &curwin->w_cursor, NULL, NULL, &end);
      if (end > oap->end_vcol)
        oap->end_vcol = end;
    }
  }
  else if (redo_VIsual_busy)
    oap->end_vcol = oap->start_vcol + redo_VIsual_vcol - 1;
  /*
   * Correct oap->end.col and oap->start.col to be the
   * upper-left and lower-right corner of the block area.
   *
   * (Actually, this does convert column positions into character
   * positions)
   */
  curwin->w_cursor.lnum = oap->end.lnum;
  coladvance(oap->end_vcol);
  oap->end = curwin->w_cursor;

  curwin->w_cursor = oap->start;
  coladvance(oap->start_vcol);
  oap->start = curwin->w_cursor;
}
