/* vi:set ts=8 sts=4 sw=4 noet:
 *
 * VIM - Vi IMproved	by Bram Moolenaar
 *
 * Do ":help uganda"  in Vim to read a list of people who contributed.
 * Do ":help credits" in Vim to see a list of people who contributed.
 * See README.txt for an overview of the Vim source code.
 */

/*
 * Implementation of popup windows.  See ":help popup".
 */

#include "vim.h"

#if defined(FEAT_PROP_POPUP) || defined(PROTO)

typedef struct {
    char	*pp_name;
    poppos_T	pp_val;
} poppos_entry_T;

static poppos_entry_T poppos_entries[] = {
    {"botleft", POPPOS_BOTLEFT},
    {"topleft", POPPOS_TOPLEFT},
    {"botright", POPPOS_BOTRIGHT},
    {"topright", POPPOS_TOPRIGHT},
    {"center", POPPOS_CENTER}
};

#ifdef HAS_MESSAGE_WINDOW
// Window used for ":echowindow"
static win_T *message_win = NULL;

// Time used for the next ":echowindow" message in msec.
static int  message_win_time = 3000;

// Flag set when a message is added to the message window, timer is started
// when the message window is drawn.  This might be after pressing Enter at the
// hit-enter prompt.
static int    start_message_win_timer = FALSE;

static void may_start_message_win_timer(win_T *wp);
#endif

static void popup_adjust_position(win_T *wp);

/*
 * Get option value for "key", which is "line" or "col".
 * Handles "cursor+N" and "cursor-N".
 * Returns MAXCOL if the entry is not present.
 */
    static int
popup_options_one(dict_T *dict, char_u *key)
{
    dictitem_T	*di;
    char_u	*val;
    char_u	*s;
    char_u	*endp;
    int		n = 0;

    di = dict_find(dict, key, -1);
    if (di == NULL)
	return MAXCOL;

    val = tv_get_string(&di->di_tv);
    if (STRNCMP(val, "cursor", 6) != 0)
	return dict_get_number_check(dict, key);

    setcursor_mayforce(TRUE);
    s = val + 6;
    if (*s != NUL)
    {
	endp = s;
	if (*skipwhite(s) == '+' || *skipwhite(s) == '-')
	    n = strtol((char *)s, (char **)&endp, 10);
	if (endp != NULL && *skipwhite(endp) != NUL)
	{
	    semsg(_(e_invalid_expression_str), val);
	    return 0;
	}
    }

    if (STRCMP(key, "line") == 0)
	n = screen_screenrow() + 1 + n;
    else // "col"
	n = screen_screencol() + 1 + n;

    // Zero means "not set", use -1 instead.
    if (n == 0)
	n = -1;
    return n;
}

    static void
set_padding_border(dict_T *dict, int *array, char *name, int max_val)
{
    dictitem_T	*di;

    di = dict_find(dict, (char_u *)name, -1);
    if (di == NULL)
	return;

    if (di->di_tv.v_type != VAR_LIST)
    {
	emsg(_(e_list_required));
	return;
    }

    list_T	*list = di->di_tv.vval.v_list;
    listitem_T	*li;
    int		i;
    int		nr;

    for (i = 0; i < 4; ++i)
	array[i] = 1;
    if (list == NULL)
	return;

    CHECK_LIST_MATERIALIZE(list);
    for (i = 0, li = list->lv_first; i < 4 && i < list->lv_len;
	    ++i, li = li->li_next)
    {
	nr = (int)tv_get_number(&li->li_tv);
	if (nr >= 0)
	    array[i] = nr > max_val ? max_val : nr;
    }
}

/*
 * Used when popup options contain "moved": set default moved values.
 */
    static void
set_moved_values(win_T *wp)
{
    wp->w_popup_curwin = curwin;
    wp->w_popup_lnum = curwin->w_cursor.lnum;
    wp->w_popup_mincol = curwin->w_cursor.col;
    wp->w_popup_maxcol = curwin->w_cursor.col;
}

/*
 * Used when popup options contain "moved" with "word" or "WORD".
 */
    static void
set_moved_columns(win_T *wp, int flags)
{
    char_u	*ptr;
    int		len = find_ident_under_cursor(&ptr, flags | FIND_NOERROR);

    if (len <= 0)
	return;

    wp->w_popup_mincol = (int)(ptr - ml_get_curline());
    wp->w_popup_maxcol = wp->w_popup_mincol + len - 1;
}

/*
 * Used when popup options contain "mousemoved": set default moved values.
 */
    static void
set_mousemoved_values(win_T *wp)
{
    wp->w_popup_mouse_row = mouse_row;
    wp->w_popup_mouse_mincol = mouse_col;
    wp->w_popup_mouse_maxcol = mouse_col;
}

    static void
update_popup_uses_mouse_move(void)
{
    popup_uses_mouse_move = FALSE;
    if (!popup_visible)
	return;

    win_T *wp;

    FOR_ALL_POPUPWINS(wp)
	if (wp->w_popup_mouse_row != 0)
	{
	    popup_uses_mouse_move = TRUE;
	    return;
	}
    FOR_ALL_POPUPWINS_IN_TAB(curtab, wp)
	if (wp->w_popup_mouse_row != 0)
	{
	    popup_uses_mouse_move = TRUE;
	    return;
	}
}

/*
 * Used when popup options contain "moved" with "word" or "WORD".
 */
    static void
set_mousemoved_columns(win_T *wp, int flags)
{
    win_T	*textwp;
    char_u	*text;
    int		col;
    pos_T	pos;
    colnr_T	mcol;

    if (find_word_under_cursor(mouse_row, mouse_col, TRUE, flags,
				  &textwp, &pos.lnum, &text, NULL, &col) != OK)
	return;

    // convert text column to mouse column
    pos.col = col;
    pos.coladd = 0;
    getvcol(textwp, &pos, &mcol, NULL, NULL);
    wp->w_popup_mouse_mincol = mcol;

    pos.col = col + (colnr_T)STRLEN(text) - 1;
    getvcol(textwp, &pos, NULL, NULL, &mcol);
    wp->w_popup_mouse_maxcol = mcol;
    vim_free(text);
}

/*
 * Return TRUE if "row"/"col" is on the border of the popup.
 * The values are relative to the top-left corner.
 */
    int
popup_on_border(win_T *wp, int row, int col)
{
    return (row == 0 && wp->w_popup_border[0] > 0)
	    || (row == popup_height(wp) - 1 && wp->w_popup_border[2] > 0)
	    || (col == 0 && wp->w_popup_border[3] > 0)
	    || (col == popup_width(wp) - 1 && wp->w_popup_border[1] > 0);
}

/*
 * Return TRUE and close the popup if "row"/"col" is on the "X" button of the
 * popup and w_popup_close is POPCLOSE_BUTTON.
 * The values are relative to the top-left corner.
 * Caller should check the left mouse button was clicked.
 * Return TRUE if the popup was closed.
 */
    int
popup_close_if_on_X(win_T *wp, int row, int col)
{
    if (wp->w_popup_close == POPCLOSE_BUTTON
	    && row == 0 && col == popup_width(wp) - 1)
    {
	popup_close_for_mouse_click(wp);
	return TRUE;
    }
    return FALSE;
}

// Values set when dragging a popup window starts.
static int drag_start_row;
static int drag_start_col;
static int drag_start_wantline;
static int drag_start_wantcol;
static int drag_on_resize_handle;

/*
 * Mouse down on border of popup window: start dragging it.
 * Uses mouse_col and mouse_row.
 */
    void
popup_start_drag(win_T *wp, int row, int col)
{
    drag_start_row = mouse_row;
    drag_start_col = mouse_col;
    if (wp->w_wantline <= 0)
	drag_start_wantline = wp->w_winrow + 1;
    else
	drag_start_wantline = wp->w_wantline;
    if (wp->w_wantcol == 0)
	drag_start_wantcol = wp->w_wincol + 1;
    else
	drag_start_wantcol = wp->w_wantcol;

    // Stop centering the popup
    if (wp->w_popup_pos == POPPOS_CENTER)
	wp->w_popup_pos = POPPOS_TOPLEFT;

    drag_on_resize_handle = wp->w_popup_border[1] > 0
			    && wp->w_popup_border[2] > 0
			    && row == popup_height(wp) - 1
			    && col == popup_width(wp) - 1;

    if (wp->w_popup_pos != POPPOS_TOPLEFT && drag_on_resize_handle)
    {
	if (wp->w_popup_pos == POPPOS_TOPRIGHT
		|| wp->w_popup_pos == POPPOS_BOTRIGHT)
	    wp->w_wantcol = wp->w_wincol + 1;
	if (wp->w_popup_pos == POPPOS_BOTLEFT)
	    wp->w_wantline = wp->w_winrow + 1;
	wp->w_popup_pos = POPPOS_TOPLEFT;
    }
}

/*
 * Mouse moved while dragging a popup window: adjust the window popup position
 * or resize.
 */
    void
popup_drag(win_T *wp)
{
    // The popup may be closed before dragging stops.
    if (!win_valid_popup(wp))
	return;

    if ((wp->w_popup_flags & POPF_RESIZE) && drag_on_resize_handle)
    {
	int width_inc = mouse_col - drag_start_col;
	int height_inc = mouse_row - drag_start_row;

	if (width_inc != 0)
	{
	    int width = wp->w_width + width_inc;

	    if (width < 1)
		width = 1;
	    wp->w_minwidth = width;
	    wp->w_maxwidth = width;
	    drag_start_col = mouse_col;
	}

	if (height_inc != 0)
	{
	    int height = wp->w_height + height_inc;

	    if (height < 1)
		height = 1;
	    wp->w_minheight = height;
	    wp->w_maxheight = height;
	    drag_start_row = mouse_row;
	}

	popup_adjust_position(wp);
	return;
    }

    if (!(wp->w_popup_flags & (POPF_DRAG | POPF_DRAGALL)))
	return;
    wp->w_wantline = drag_start_wantline + (mouse_row - drag_start_row);
    if (wp->w_wantline < 1)
	wp->w_wantline = 1;
    if (wp->w_wantline > Rows)
	wp->w_wantline = Rows;
    wp->w_wantcol = drag_start_wantcol + (mouse_col - drag_start_col);
    if (wp->w_wantcol < 1)
	wp->w_wantcol = 1;
    if (wp->w_wantcol > Columns)
	wp->w_wantcol = Columns;

    popup_adjust_position(wp);
}

/*
 * Set w_firstline to match the current "wp->w_topline".
 */
    void
popup_set_firstline(win_T *wp)
{
    int	    height = wp->w_height;

    wp->w_firstline = wp->w_topline;
    popup_adjust_position(wp);

    // we don't want the popup to get smaller, decrement the first line
    // until it doesn't
    while (wp->w_firstline > 1 && wp->w_height < height)
    {
	--wp->w_firstline;
	popup_adjust_position(wp);
    }
}

/*
 * Return TRUE if the position is in the popup window scrollbar.
 */
    int
popup_is_in_scrollbar(win_T *wp, int row, int col)
{
    return wp->w_has_scrollbar
	&& row >= wp->w_popup_border[0]
	&& row < popup_height(wp) - wp->w_popup_border[2]
	&& col == popup_width(wp) - wp->w_popup_border[1] - 1;
}


/*
 * Handle a click in a popup window, if it is in the scrollbar.
 */
    void
popup_handle_scrollbar_click(win_T *wp, int row, int col)
{
    if (!popup_is_in_scrollbar(wp, row, col))
	return;

    int	    height = popup_height(wp);
    int	    new_topline = wp->w_topline;

    if (row >= height / 2)
    {
	// Click in lower half, scroll down.
	if (wp->w_topline < wp->w_buffer->b_ml.ml_line_count)
	    ++new_topline;
    }
    else if (wp->w_topline > 1)
	// click on upper half, scroll up.
	--new_topline;

    if (new_topline == wp->w_topline)
	return;

    set_topline(wp, new_topline);
    if (wp == curwin)
    {
	if (wp->w_cursor.lnum < wp->w_topline)
	{
	    wp->w_cursor.lnum = wp->w_topline;
	    check_cursor();
	}
	else if (wp->w_cursor.lnum >= wp->w_botline)
	{
	    wp->w_cursor.lnum = wp->w_botline - 1;
	    check_cursor();
	}
    }
    popup_set_firstline(wp);
    redraw_win_later(wp, UPD_NOT_VALID);
}

#if defined(FEAT_TIMERS)
/*
 * Add a timer to "wp" with "time".
 * If "close" is true use popup_close(), otherwise popup_hide().
 */
    static void
popup_add_timeout(win_T *wp, int time, int close)
{
    char_u	    cbbuf[50];
    char_u	    *ptr = cbbuf;
    typval_T	    tv;

    vim_snprintf((char *)cbbuf, sizeof(cbbuf),
		close ? "(_) => popup_close(%d)" : "(_) => popup_hide(%d)",
		wp->w_id);
    if (get_lambda_tv_and_compile(&ptr, &tv, FALSE, &EVALARG_EVALUATE) != OK)
	return;

    wp->w_popup_timer = create_timer(time, 0);
    callback_T cb = get_callback(&tv);
    if (cb.cb_name != NULL && !cb.cb_free_name)
    {
	cb.cb_name = vim_strsave(cb.cb_name);
	cb.cb_free_name = TRUE;
    }
    wp->w_popup_timer->tr_callback = cb;
    clear_tv(&tv);
}
#endif

    static poppos_T
get_pos_entry(dict_T *d, int give_error)
{
    char_u  *str = dict_get_string(d, "pos", FALSE);
    int	    nr;

    if (str == NULL)
	return POPPOS_NONE;

    for (nr = 0; nr < (int)ARRAY_LENGTH(poppos_entries); ++nr)
	if (STRCMP(str, poppos_entries[nr].pp_name) == 0)
	    return poppos_entries[nr].pp_val;

    if (give_error)
	semsg(_(e_invalid_argument_str), str);
    return POPPOS_NONE;
}

/*
 * Shared between popup_create() and f_popup_move().
 */
    static void
apply_move_options(win_T *wp, dict_T *d)
{
    int		nr;
    char_u	*str;
    dictitem_T	*di;

    if ((nr = dict_get_number_def(d, "minwidth", -1)) >= 0)
	wp->w_minwidth = nr;
    if ((nr = dict_get_number_def(d, "minheight", -1)) >= 0)
	wp->w_minheight = nr;
    if ((nr = dict_get_number_def(d, "maxwidth", -1)) >= 0)
	wp->w_maxwidth = nr;
    if ((nr = dict_get_number_def(d, "maxheight", -1)) >= 0)
	wp->w_maxheight = nr;

    nr = popup_options_one(d, (char_u *)"line");
    if (nr != MAXCOL)
	wp->w_wantline = nr;
    nr = popup_options_one(d, (char_u *)"col");
    if (nr != MAXCOL)
	wp->w_wantcol = nr;


    nr = dict_get_bool(d, "fixed", -1);
    if (nr != -1)
	wp->w_popup_fixed = nr != 0;

    {
	poppos_T ppt = get_pos_entry(d, TRUE);

	if (ppt != POPPOS_NONE)
	    wp->w_popup_pos = ppt;
    }

    str = dict_get_string(d, "textprop", FALSE);
    if (str != NULL)
    {
	wp->w_popup_prop_type = 0;
	if (*str != NUL)
	{
	    wp->w_popup_prop_win = curwin;
	    di = dict_find(d, (char_u *)"textpropwin", -1);
	    if (di != NULL)
	    {
		wp->w_popup_prop_win = find_win_by_nr_or_id(&di->di_tv);
		if (!win_valid_any_tab(wp->w_popup_prop_win))
		    wp->w_popup_prop_win = curwin;
	    }

	    nr = find_prop_type_id(str, wp->w_popup_prop_win->w_buffer);
	    if (nr <= 0)
		nr = find_prop_type_id(str, NULL);
	    if (nr <= 0)
		semsg(_(e_invalid_argument_str), str);
	    else
		wp->w_popup_prop_type = nr;
	}
    }

    di = dict_find(d, (char_u *)"textpropid", -1);
    if (di != NULL)
	wp->w_popup_prop_id = dict_get_number(d, "textpropid");
}

/*
 * Handle "moved" and "mousemoved" arguments.
 */
    static void
handle_moved_argument(win_T *wp, dictitem_T *di, int mousemoved)
{
    if (di->di_tv.v_type == VAR_STRING && di->di_tv.vval.v_string != NULL)
    {
	char_u  *s = di->di_tv.vval.v_string;
	int	flags = 0;

	if (STRCMP(s, "word") == 0)
	    flags = FIND_IDENT | FIND_STRING;
	else if (STRCMP(s, "WORD") == 0)
	    flags = FIND_STRING;
	else if (STRCMP(s, "expr") == 0)
	    flags = FIND_IDENT | FIND_STRING | FIND_EVAL;
	else if (STRCMP(s, "any") != 0)
	    semsg(_(e_invalid_argument_str), s);
	if (flags != 0)
	{
	    if (mousemoved)
		set_mousemoved_columns(wp, flags);
	    else
		set_moved_columns(wp, flags);
	}
    }
    else if (di->di_tv.v_type == VAR_LIST
	    && di->di_tv.vval.v_list != NULL
	    && (di->di_tv.vval.v_list->lv_len == 2
	     || di->di_tv.vval.v_list->lv_len == 3))
    {
	list_T	    *l = di->di_tv.vval.v_list;
	listitem_T  *li;
	int	    mincol;
	int	    maxcol;

	CHECK_LIST_MATERIALIZE(l);
	li = l->lv_first;
	if (l->lv_len == 3)
	{
	    varnumber_T nr = tv_get_number(&l->lv_first->li_tv);

	    // Three numbers, might be from popup_getoptions().
	    if (mousemoved)
		wp->w_popup_mouse_row = nr;
	    else
		wp->w_popup_lnum = nr;
	    li = li->li_next;
	    if (nr == 0)
		wp->w_popup_curwin = NULL;
	}

	mincol = tv_get_number(&li->li_tv);
	maxcol = tv_get_number(&li->li_next->li_tv);
	if (mousemoved)
	{
	    wp->w_popup_mouse_mincol = mincol;
	    wp->w_popup_mouse_maxcol = maxcol;
	}
	else
	{
	    wp->w_popup_mincol = mincol;
	    wp->w_popup_maxcol = maxcol;
	}
    }
    else
	semsg(_(e_invalid_argument_str), tv_get_string(&di->di_tv));
}

    static void
check_highlight(dict_T *dict, char *name, char_u **pval)
{
    dictitem_T  *di;
    char_u	*str;

    di = dict_find(dict, (char_u *)name, -1);
    if (di == NULL)
	return;

    if (di->di_tv.v_type != VAR_STRING)
	semsg(_(e_invalid_value_for_argument_str), name);
    else
    {
	str = tv_get_string(&di->di_tv);
	if (*str != NUL)
	    *pval = vim_strsave(str);
    }
}

/*
 * Scroll to show the line with the cursor.
 */
    static void
popup_show_curline(win_T *wp)
{
    if (wp->w_cursor.lnum < wp->w_topline)
	wp->w_topline = wp->w_cursor.lnum;
    else if (wp->w_cursor.lnum >= wp->w_botline
					      && (wp->w_valid & VALID_BOTLINE))
    {
	wp->w_topline = wp->w_cursor.lnum - wp->w_height + 1;
	if (wp->w_topline < 1)
	    wp->w_topline = 1;
	else if (wp->w_topline > wp->w_buffer->b_ml.ml_line_count)
	    wp->w_topline = wp->w_buffer->b_ml.ml_line_count;
	while (wp->w_topline < wp->w_cursor.lnum
		&& wp->w_topline < wp->w_buffer->b_ml.ml_line_count
		&& plines_m_win(wp, wp->w_topline, wp->w_cursor.lnum)
								> wp->w_height)
	    ++wp->w_topline;
    }

    // Don't let "firstline" cause a scroll.
    if (wp->w_firstline > 0)
	wp->w_firstline = wp->w_topline;
}

/*
 * Get the sign group name for window "wp".
 * Returns a pointer to a static buffer, overwritten on the next call.
 */
    static char_u *
popup_get_sign_name(win_T *wp)
{
    static char    buf[30];

    vim_snprintf(buf, sizeof(buf), "popup-%d", wp->w_id);
    return (char_u *)buf;
}

/*
 * Highlight the line with the cursor.
 * Also scrolls the text to put the cursor line in view.
 */
    static void
popup_highlight_curline(win_T *wp)
{
    int	    sign_id = 0;
    char_u  *sign_name = popup_get_sign_name(wp);

    buf_delete_signs(wp->w_buffer, (char_u *)"PopUpMenu");

    if ((wp->w_popup_flags & POPF_CURSORLINE) != 0)
    {
	popup_show_curline(wp);

	if (!sign_exists_by_name(sign_name))
	{
	    char *linehl = "PopupSelected";

	    if (syn_name2id((char_u *)linehl) == 0)
		linehl = "PmenuSel";
	    sign_define_by_name(sign_name, NULL, (char_u *)linehl,
						       NULL, NULL, NULL, NULL);
	}

	sign_place(&sign_id, (char_u *)"PopUpMenu", sign_name,
			       wp->w_buffer, wp->w_cursor.lnum, SIGN_DEF_PRIO);
	redraw_win_later(wp, UPD_NOT_VALID);
    }
    else
	sign_undefine_by_name(sign_name, FALSE);
    wp->w_popup_last_curline = wp->w_cursor.lnum;
}

/*
 * Shared between popup_create() and f_popup_setoptions().
 */
    static void
apply_general_options(win_T *wp, dict_T *dict)
{
    dictitem_T	*di;
    int		nr;
    char_u	*str;

    // TODO: flip

    di = dict_find(dict, (char_u *)"firstline", -1);
    if (di != NULL)
    {
	wp->w_firstline = dict_get_number(dict, "firstline");
	if (wp->w_firstline < 0)
	    wp->w_firstline = -1;
    }

    nr = dict_get_bool(dict, "scrollbar", -1);
    if (nr != -1)
	wp->w_want_scrollbar = nr;

    str = dict_get_string(dict, "title", FALSE);
    if (str != NULL)
    {
	vim_free(wp->w_popup_title);
	wp->w_popup_title = vim_strsave(str);
    }

    nr = dict_get_bool(dict, "wrap", -1);
    if (nr != -1)
	wp->w_p_wrap = nr != 0;

    nr = dict_get_bool(dict, "drag", -1);
    if (nr != -1)
    {
	if (nr)
	    wp->w_popup_flags |= POPF_DRAG;
	else
	    wp->w_popup_flags &= ~POPF_DRAG;
    }
    nr = dict_get_bool(dict, "dragall", -1);
    if (nr != -1)
    {
	if (nr)
	    wp->w_popup_flags |= POPF_DRAGALL;
	else
	    wp->w_popup_flags &= ~POPF_DRAGALL;
    }

    nr = dict_get_bool(dict, "posinvert", -1);
    if (nr != -1)
    {
	if (nr)
	    wp->w_popup_flags |= POPF_POSINVERT;
	else
	    wp->w_popup_flags &= ~POPF_POSINVERT;
    }

    nr = dict_get_bool(dict, "resize", -1);
    if (nr != -1)
    {
	if (nr)
	    wp->w_popup_flags |= POPF_RESIZE;
	else
	    wp->w_popup_flags &= ~POPF_RESIZE;
    }

    di = dict_find(dict, (char_u *)"close", -1);
    if (di != NULL)
    {
	int ok = TRUE;

	if (di->di_tv.v_type == VAR_STRING && di->di_tv.vval.v_string != NULL)
	{
	    char_u  *s = di->di_tv.vval.v_string;

	    if (STRCMP(s, "none") == 0)
		wp->w_popup_close = POPCLOSE_NONE;
	    else if (STRCMP(s, "button") == 0)
		wp->w_popup_close = POPCLOSE_BUTTON;
	    else if (STRCMP(s, "click") == 0)
		wp->w_popup_close = POPCLOSE_CLICK;
	    else
		ok = FALSE;
	}
	else
	    ok = FALSE;
	if (!ok)
	    semsg(_(e_invalid_value_for_argument_str_str), "close", tv_get_string(&di->di_tv));
    }

    str = dict_get_string(dict, "highlight", FALSE);
    if (str != NULL)
    {
	set_string_option_direct_in_win(wp, (char_u *)"wincolor", -1,
						   str, OPT_FREE|OPT_LOCAL, 0);
#ifdef FEAT_TERMINAL
	term_update_wincolor(wp);
#endif
    }

    set_padding_border(dict, wp->w_popup_padding, "padding", 999);
    set_padding_border(dict, wp->w_popup_border, "border", 1);

    di = dict_find(dict, (char_u *)"borderhighlight", -1);
    if (di != NULL)
    {
	if (di->di_tv.v_type != VAR_LIST || di->di_tv.vval.v_list == NULL)
	    emsg(_(e_list_required));
	else
	{
	    list_T	*list = di->di_tv.vval.v_list;
	    listitem_T	*li;
	    int		i;

	    CHECK_LIST_MATERIALIZE(list);
	    for (i = 0, li = list->lv_first; i < 4 && i < list->lv_len;
						     ++i, li = li->li_next)
	    {
		str = tv_get_string(&li->li_tv);
		if (*str != NUL)
		{
		    vim_free(wp->w_border_highlight[i]);
		    wp->w_border_highlight[i] = vim_strsave(str);
		}
	    }
	    if (list->lv_len == 1 && wp->w_border_highlight[0] != NULL)
		for (i = 1; i < 4; ++i)
		{
		    vim_free(wp->w_border_highlight[i]);
		    wp->w_border_highlight[i] =
					vim_strsave(wp->w_border_highlight[0]);
		}
	}
    }

    di = dict_find(dict, (char_u *)"borderchars", -1);
    if (di != NULL)
    {
	if (di->di_tv.v_type != VAR_LIST)
	    emsg(_(e_list_required));
	else
	{
	    list_T	*list = di->di_tv.vval.v_list;
	    listitem_T	*li;
	    int		i;

	    if (list != NULL)
	    {
		CHECK_LIST_MATERIALIZE(list);
		for (i = 0, li = list->lv_first; i < 8 && i < list->lv_len;
							 ++i, li = li->li_next)
		{
		    str = tv_get_string(&li->li_tv);
		    if (*str != NUL)
			wp->w_border_char[i] = mb_ptr2char(str);
		}
		if (list->lv_len == 1)
		    for (i = 1; i < 8; ++i)
			wp->w_border_char[i] = wp->w_border_char[0];
		if (list->lv_len == 2)
		{
		    for (i = 4; i < 8; ++i)
			wp->w_border_char[i] = wp->w_border_char[1];
		    for (i = 1; i < 4; ++i)
			wp->w_border_char[i] = wp->w_border_char[0];
		}
	    }
	}
    }

    check_highlight(dict, "scrollbarhighlight", &wp->w_scrollbar_highlight);
    check_highlight(dict, "thumbhighlight", &wp->w_thumb_highlight);

    di = dict_find(dict, (char_u *)"zindex", -1);
    if (di != NULL)
    {
	wp->w_zindex = dict_get_number(dict, "zindex");
	if (wp->w_zindex < 1)
	    wp->w_zindex = POPUPWIN_DEFAULT_ZINDEX;
	if (wp->w_zindex > 32000)
	    wp->w_zindex = 32000;
    }

    di = dict_find(dict, (char_u *)"mask", -1);
    if (di != NULL)
    {
	int ok = FALSE;

	if (di->di_tv.v_type == VAR_LIST && di->di_tv.vval.v_list != NULL)
	{
	    listitem_T *li;

	    ok = TRUE;
	    FOR_ALL_LIST_ITEMS(di->di_tv.vval.v_list, li)
	    {
		if (li->li_tv.v_type != VAR_LIST
			|| li->li_tv.vval.v_list == NULL
			|| li->li_tv.vval.v_list->lv_len != 4)
		{
		    ok = FALSE;
		    break;
		}
		else
		    CHECK_LIST_MATERIALIZE(li->li_tv.vval.v_list);
	    }
	}
	if (ok)
	{
	    wp->w_popup_mask = di->di_tv.vval.v_list;
	    ++wp->w_popup_mask->lv_refcount;
	    VIM_CLEAR(wp->w_popup_mask_cells);
	}
	else
	    semsg(_(e_invalid_value_for_argument_str), "mask");
    }

#if defined(FEAT_TIMERS)
    // Add timer to close the popup after some time.
    nr = dict_get_number(dict, "time");
    if (nr > 0)
	popup_add_timeout(wp, nr, TRUE);
#endif

    di = dict_find(dict, (char_u *)"moved", -1);
    if (di != NULL)
    {
	set_moved_values(wp);
	handle_moved_argument(wp, di, FALSE);
    }

    di = dict_find(dict, (char_u *)"mousemoved", -1);
    if (di != NULL)
    {
	set_mousemoved_values(wp);
	handle_moved_argument(wp, di, TRUE);
    }

    nr = dict_get_bool(dict, "cursorline", -1);
    if (nr != -1)
    {
	if (nr != 0)
	    wp->w_popup_flags |= POPF_CURSORLINE;
	else
	    wp->w_popup_flags &= ~POPF_CURSORLINE;
    }

    di = dict_find(dict, (char_u *)"filter", -1);
    if (di != NULL)
    {
	callback_T	callback = get_callback(&di->di_tv);

	if (callback.cb_name != NULL)
	{
	    free_callback(&wp->w_filter_cb);
	    set_callback(&wp->w_filter_cb, &callback);
	    if (callback.cb_free_name)
		vim_free(callback.cb_name);
	}
    }
    nr = dict_get_bool(dict, "mapping", -1);
    if (nr != -1)
    {
	if (nr)
	    wp->w_popup_flags |= POPF_MAPPING;
	else
	    wp->w_popup_flags &= ~POPF_MAPPING;
    }

    str = dict_get_string(dict, "filtermode", FALSE);
    if (str != NULL)
    {
	if (STRCMP(str, "a") == 0)
	    wp->w_filter_mode = MODE_ALL;
	else
	    wp->w_filter_mode = mode_str2flags(str);
    }

    di = dict_find(dict, (char_u *)"callback", -1);
    if (di == NULL)
	return;

    callback_T	callback = get_callback(&di->di_tv);
    if (callback.cb_name == NULL)
	return;

    free_callback(&wp->w_close_cb);
    set_callback(&wp->w_close_cb, &callback);
    if (callback.cb_free_name)
	vim_free(callback.cb_name);
}

/*
 * Go through the options in "dict" and apply them to popup window "wp".
 * "create" is TRUE when creating a new popup window.
 */
    static void
apply_options(win_T *wp, dict_T *dict, int create)
{
    int		nr;

    apply_move_options(wp, dict);

    if (create)
	set_string_option_direct_in_win(wp, (char_u *)"signcolumn", -1,
					(char_u *)"no", OPT_FREE|OPT_LOCAL, 0);

    apply_general_options(wp, dict);

    nr = dict_get_bool(dict, "hidden", FALSE);
    if (nr > 0)
	wp->w_popup_flags |= POPF_HIDDEN | POPF_HIDDEN_FORCE;

    // when "firstline" and "cursorline" are both set and the cursor would be
    // above or below the displayed lines, move the cursor to "firstline".
    if (wp->w_firstline > 0 && (wp->w_popup_flags & POPF_CURSORLINE))
    {
	if (wp->w_firstline > wp->w_buffer->b_ml.ml_line_count)
	    wp->w_cursor.lnum = wp->w_buffer->b_ml.ml_line_count;
	else if (wp->w_cursor.lnum < wp->w_firstline
		|| wp->w_cursor.lnum >= wp->w_firstline + wp->w_height)
	    wp->w_cursor.lnum = wp->w_firstline;
	wp->w_topline = wp->w_firstline;
	wp->w_valid &= ~VALID_BOTLINE;
    }

    popup_mask_refresh = TRUE;
    popup_highlight_curline(wp);
}

/*
 * Add lines to the popup from a list of strings.
 */
    static void
add_popup_strings(buf_T *buf, list_T *l)
{
    listitem_T  *li;
    linenr_T    lnum = 0;
    char_u	*p;

    FOR_ALL_LIST_ITEMS(l, li)
	if (li->li_tv.v_type == VAR_STRING)
	{
	    p = li->li_tv.vval.v_string;
	    ml_append_buf(buf, lnum++,
			       p == NULL ? (char_u *)"" : p, (colnr_T)0, TRUE);
	}
}

/*
 * Add lines to the popup from a list of dictionaries.
 */
    static void
add_popup_dicts(buf_T *buf, list_T *l)
{
    listitem_T  *li;
    listitem_T  *pli;
    linenr_T    lnum = 0;
    char_u	*p;
    dict_T	*dict;

    // first add the text lines
    FOR_ALL_LIST_ITEMS(l, li)
    {
	if (li->li_tv.v_type != VAR_DICT)
	{
	    semsg(_(e_argument_1_list_item_nr_dictionary_required), lnum + 1);
	    return;
	}
	dict = li->li_tv.vval.v_dict;
	p = dict == NULL ? NULL : dict_get_string(dict, "text", FALSE);
	ml_append_buf(buf, lnum++,
			       p == NULL ? (char_u *)"" : p, (colnr_T)0, TRUE);
    }

    // add the text properties
    lnum = 1;
    for (li = l->lv_first; li != NULL; li = li->li_next, ++lnum)
    {
	dictitem_T	*di;
	list_T		*plist;

	dict = li->li_tv.vval.v_dict;
	di = dict_find(dict, (char_u *)"props", -1);
	if (di != NULL)
	{
	    if (di->di_tv.v_type != VAR_LIST)
	    {
		emsg(_(e_list_required));
		return;
	    }
	    plist = di->di_tv.vval.v_list;
	    if (plist != NULL)
	    {
		FOR_ALL_LIST_ITEMS(plist, pli)
		{
		    if (pli->li_tv.v_type != VAR_DICT)
		    {
			emsg(_(e_dictionary_required));
			return;
		    }
		    dict = pli->li_tv.vval.v_dict;
		    if (dict != NULL)
		    {
			int col = dict_get_number(dict, "col");

			prop_add_common(lnum, col, dict, buf, NULL);
		    }
		}
	    }
	}
    }
}

/*
 * Get the padding plus border at the top, adjusted to 1 if there is a title.
 */
    int
popup_top_extra(win_T *wp)
{
    int	extra = wp->w_popup_border[0] + wp->w_popup_padding[0];

    if (extra == 0 && wp->w_popup_title != NULL && *wp->w_popup_title != NUL)
	return 1;
    return extra;
}

/*
 * Get the padding plus border at the left.
 */
    int
popup_left_extra(win_T *wp)
{
    return wp->w_popup_border[3] + wp->w_popup_padding[3];
}

/*
 * Return the height of popup window "wp", including border and padding.
 */
    int
popup_height(win_T *wp)
{
    return wp->w_height
	    + popup_top_extra(wp)
	    + wp->w_popup_padding[2] + wp->w_popup_border[2];
}

/*
 * Return the width of popup window "wp", including border, padding and
 * scrollbar.
 */
    int
popup_width(win_T *wp)
{
    // w_leftcol is how many columns of the core are left of the screen
    // w_popup_rightoff is how many columns of the core are right of the screen
    return wp->w_width + wp->w_leftcol
	    + popup_extra_width(wp)
	    + wp->w_popup_rightoff;
}

/*
 * Return the extra width of popup window "wp": border, padding and scrollbar.
 */
    int
popup_extra_width(win_T *wp)
{
    return wp->w_popup_padding[3] + wp->w_popup_border[3]
	    + wp->w_popup_padding[1] + wp->w_popup_border[1]
	    + wp->w_has_scrollbar;
}

/*
 * Adjust the position and size of the popup to fit on the screen.
 */
    static void
popup_adjust_position(win_T *wp)
{
    linenr_T	lnum;
    int		wrapped = 0;
    int		maxwidth;
    int		maxwidth_no_scrollbar;
    int		width_with_scrollbar = 0;
    int		used_maxwidth = FALSE;
    int		margin_width = 0;
    int		maxspace;
    int		center_vert = FALSE;
    int		center_hor = FALSE;
    int		allow_adjust_left = !wp->w_popup_fixed;
    int		top_extra = popup_top_extra(wp);
    int		right_extra = wp->w_popup_border[1] + wp->w_popup_padding[1];
    int		bot_extra = wp->w_popup_border[2] + wp->w_popup_padding[2];
    int		left_extra = wp->w_popup_border[3] + wp->w_popup_padding[3];
    int		extra_height = top_extra + bot_extra;
    int		extra_width = left_extra + right_extra;
    int		w_height_before_limit;
    int		org_winrow = wp->w_winrow;
    int		org_wincol = wp->w_wincol;
    int		org_width = wp->w_width;
    int		org_height = wp->w_height;
    int		org_leftcol = wp->w_leftcol;
    int		org_leftoff = wp->w_popup_leftoff;
    int		minwidth, minheight;
    int		maxheight = Rows;
    int		wantline = wp->w_wantline;  // adjusted for textprop
    int		wantcol = wp->w_wantcol;    // adjusted for textprop
    int		use_wantcol = wantcol != 0;
    int		adjust_height_for_top_aligned = FALSE;

    wp->w_winrow = 0;
    wp->w_wincol = 0;
    wp->w_leftcol = 0;
    wp->w_popup_leftoff = 0;
    wp->w_popup_rightoff = 0;

    // May need to update the "cursorline" highlighting, which may also change
    // "topline"
    if (wp->w_popup_last_curline != wp->w_cursor.lnum)
	popup_highlight_curline(wp);

    if (wp->w_popup_prop_type > 0 && win_valid(wp->w_popup_prop_win))
    {
	win_T	    *prop_win = wp->w_popup_prop_win;
	textprop_T  prop;
	linenr_T    prop_lnum;
	pos_T	    pos;
	int	    screen_row;
	int	    screen_scol;
	int	    screen_ccol;
	int	    screen_ecol;

	// Popup window is positioned relative to a text property.
	if (find_visible_prop(prop_win,
				wp->w_popup_prop_type, wp->w_popup_prop_id,
				&prop, &prop_lnum) == FAIL)
	{
	    // Text property is no longer visible, hide the popup.
	    // Unhiding the popup is done in check_popup_unhidden().
	    if ((wp->w_popup_flags & POPF_HIDDEN) == 0)
	    {
		wp->w_popup_flags |= POPF_HIDDEN;
		if (win_valid(wp->w_popup_prop_win))
		    redraw_win_later(wp->w_popup_prop_win, UPD_SOME_VALID);
	    }
	    return;
	}

	// Compute the desired position from the position of the text
	// property.  Use "wantline" and "wantcol" as offsets.
	pos.lnum = prop_lnum;
	pos.col = prop.tp_col;
	if (wp->w_popup_pos == POPPOS_TOPLEFT
		|| wp->w_popup_pos == POPPOS_BOTLEFT)
	    pos.col += prop.tp_len - 1;
	textpos2screenpos(prop_win, &pos, &screen_row,
				     &screen_scol, &screen_ccol, &screen_ecol);

	if (screen_scol == 0)
	{
	    // position is off screen, make the width zero to hide it.
	    wp->w_width = 0;
	    return;
	}
	if (wp->w_popup_pos == POPPOS_TOPLEFT
		|| wp->w_popup_pos == POPPOS_TOPRIGHT)
	    // below the text
	    wantline = screen_row + wantline + 1;
	else
	    // above the text
	    wantline = screen_row + wantline - 1;
	center_vert = FALSE;
	if (wp->w_popup_pos == POPPOS_TOPLEFT
		|| wp->w_popup_pos == POPPOS_BOTLEFT)
	    // right of the text
	    wantcol = screen_ecol + wantcol;
	else
	    // left of the text
	    wantcol = screen_scol + wantcol - 2;
	use_wantcol = TRUE;
    }
    else
    {
	// If no line was specified default to vertical centering.
	if (wantline == 0)
	    center_vert = TRUE;
	else if (wantline < 0)
	    // If "wantline" is negative it actually means zero.
	    wantline = 0;
	if (wantcol < 0)
	    // If "wantcol" is negative it actually means zero.
	    wantcol = 0;
    }

    if (wp->w_popup_pos == POPPOS_CENTER)
    {
	// center after computing the size
	center_vert = TRUE;
	center_hor = TRUE;
    }
    else
    {
	if (wantline > 0 && (wp->w_popup_pos == POPPOS_TOPLEFT
					|| wp->w_popup_pos == POPPOS_TOPRIGHT))
	{
	    wp->w_winrow = wantline - 1;
	    if (wp->w_winrow >= Rows)
		wp->w_winrow = Rows - 1;
	}
	if (wp->w_popup_pos == POPPOS_BOTTOM)
	{
	    // Assume that each buffer line takes one screen line, and one line
	    // for the top border.  First make sure cmdline_row is valid,
	    // calling update_screen() will set it only later.
	    compute_cmdrow();
	    wp->w_winrow = MAX(cmdline_row
				    - wp->w_buffer->b_ml.ml_line_count - 1, 0);
	}

	if (!use_wantcol)
	    center_hor = TRUE;
	else if (wantcol > 0 && (wp->w_popup_pos == POPPOS_TOPLEFT
		|| wp->w_popup_pos == POPPOS_BOTLEFT))
	{
	    wp->w_wincol = wantcol - 1;
	    // Need to see at least one character after the decoration.
	    if (wp->w_wincol > Columns - left_extra - 1)
		wp->w_wincol = Columns - left_extra - 1;
	}
    }

    // When centering or right aligned, use maximum width.
    // When left aligned use the space available, but shift to the left when we
    // hit the right of the screen.
    maxspace = Columns - wp->w_wincol - left_extra;
    maxwidth = maxspace;
    if (wp->w_maxwidth > 0 && maxwidth > wp->w_maxwidth)
    {
	allow_adjust_left = FALSE;
	maxwidth = wp->w_maxwidth;
    }

    if (wp->w_p_nu || wp->w_p_rnu)
	margin_width = number_width(wp) + 1;
#ifdef FEAT_FOLDING
    margin_width += wp->w_p_fdc;
#endif
#ifdef FEAT_SIGNS
    if (signcolumn_on(wp))
	margin_width += 2;
#endif
    if (margin_width >= maxwidth)
	margin_width = maxwidth - 1;

    minwidth = wp->w_minwidth;
    minheight = wp->w_minheight;
#ifdef FEAT_TERMINAL
    // A terminal popup initially does not have content, use a default minimal
    // width of 20 characters and height of 5 lines.
    if (wp->w_buffer->b_term != NULL)
    {
	if (minwidth == 0)
	    minwidth = 20;
	if (minheight == 0)
	    minheight = 5;
    }
#endif

    if (wp->w_maxheight > 0)
	maxheight = wp->w_maxheight;
    else if (wp->w_popup_pos == POPPOS_BOTTOM)
	maxheight = cmdline_row - 1;

    // start at the desired first line
    if (wp->w_firstline > 0)
	wp->w_topline = wp->w_firstline;
    if (wp->w_topline < 1)
	wp->w_topline = 1;
    else if (wp->w_topline > wp->w_buffer->b_ml.ml_line_count)
	wp->w_topline = wp->w_buffer->b_ml.ml_line_count;

    // Compute width based on longest text line and the 'wrap' option.
    // Use a minimum width of one, so that something shows when there is no
    // text.
    // When "firstline" is -1 then start with the last buffer line and go
    // backwards.
    // TODO: more accurate wrapping
    wp->w_width = 1;
    if (wp->w_firstline < 0)
	lnum = wp->w_buffer->b_ml.ml_line_count;
    else
	lnum = wp->w_topline;
    while (lnum >= 1 && lnum <= wp->w_buffer->b_ml.ml_line_count)
    {
	int len;
	int w_width = wp->w_width;

	// Count Tabs for what they are worth and compute the length based on
	// the maximum width (matters when 'showbreak' is set).
	// "margin_width" is added to "len" where it matters.
	if (wp->w_width < maxwidth)
	    wp->w_width = maxwidth;
	len = linetabsize(wp, lnum);
	wp->w_width = w_width;

	if (wp->w_p_wrap)
	{
	    while (len + margin_width > maxwidth)
	    {
		++wrapped;
		len -= maxwidth - margin_width;
		wp->w_width = maxwidth;
		used_maxwidth = TRUE;
	    }
	}
	else if (len + margin_width > maxwidth
		&& allow_adjust_left
		&& (wp->w_popup_pos == POPPOS_TOPLEFT
		    || wp->w_popup_pos == POPPOS_BOTLEFT))
	{
	    // adjust leftwise to fit text on screen
	    int shift_by = len + margin_width - maxwidth;

	    if (shift_by > wp->w_wincol)
	    {
		int truncate_shift = shift_by - wp->w_wincol;

		len -= truncate_shift;
		shift_by -= truncate_shift;
	    }

	    wp->w_wincol -= shift_by;
	    maxwidth += shift_by;
	    wp->w_width = maxwidth;
	}
	if (wp->w_width < len + margin_width)
	{
	    wp->w_width = len + margin_width;
	    if (wp->w_maxwidth > 0 && wp->w_width > wp->w_maxwidth)
		wp->w_width = wp->w_maxwidth;
	}

	if (wp->w_firstline < 0)
	    --lnum;
	else
	    ++lnum;

	// do not use the width of lines we're not going to show
	if (maxheight > 0
		   && (wp->w_firstline >= 0
			       ? lnum - wp->w_topline
			       : wp->w_buffer->b_ml.ml_line_count - lnum)
		       + wrapped >= maxheight)
	    break;
    }

    if (wp->w_firstline < 0)
	wp->w_topline = lnum + 1;

    wp->w_has_scrollbar = wp->w_want_scrollbar
	   && (wp->w_topline > 1 || lnum <= wp->w_buffer->b_ml.ml_line_count);
#ifdef FEAT_TERMINAL
    if (wp->w_buffer->b_term != NULL && !term_is_finished(wp->w_buffer))
	// Terminal window with running job never has a scrollbar, adjusts to
	// window height.
	wp->w_has_scrollbar = FALSE;
#endif
    maxwidth_no_scrollbar = maxwidth;
    if (wp->w_has_scrollbar)
    {
	++right_extra;
	++extra_width;
	// make space for the scrollbar if needed, when lines wrap and when
	// applying minwidth
	if (maxwidth + right_extra >= maxspace
		&& (used_maxwidth || (minwidth > 0 && wp->w_width < minwidth)))
	    maxwidth -= wp->w_popup_padding[1] + 1;
    }

    if (wp->w_popup_title != NULL && *wp->w_popup_title != NUL)
    {
	int title_len = vim_strsize(wp->w_popup_title) + 2 - extra_width;

	if (minwidth < title_len)
	    minwidth = title_len;
    }

    if (minwidth > 0 && wp->w_width < minwidth)
	wp->w_width = minwidth;
    if (wp->w_width > maxwidth)
    {
	if (wp->w_width > maxspace && !wp->w_p_wrap)
	    // some columns cut off on the right
	    wp->w_popup_rightoff = wp->w_width - maxspace;

	// If the window doesn't fit because 'minwidth' is set then the
	// scrollbar is at the far right of the screen, use the size without
	// the scrollbar.
	if (wp->w_has_scrollbar && wp->w_minwidth > 0)
	{
	    int off = wp->w_width - maxwidth;

	    if (off > right_extra)
		extra_width -= right_extra;
	    else
		extra_width -= off;
	    wp->w_width = maxwidth_no_scrollbar;
	}
	else
	{
	    wp->w_width = maxwidth;

	    // when adding a scrollbar below need to adjust the width
	    width_with_scrollbar = maxwidth_no_scrollbar - right_extra;
	}
    }
    if (center_hor)
    {
	wp->w_wincol = (Columns - wp->w_width - extra_width) / 2;
	if (wp->w_wincol < 0)
	    wp->w_wincol = 0;
    }
    else if (wp->w_popup_pos == POPPOS_BOTRIGHT
	    || wp->w_popup_pos == POPPOS_TOPRIGHT)
    {
	int leftoff = wantcol - (wp->w_width + extra_width);

	// Right aligned: move to the right if needed.
	// No truncation, because that would change the height.
	if (leftoff >= 0)
	    wp->w_wincol = leftoff;
	else if (wp->w_popup_fixed)
	{
	    // "col" specifies the right edge, but popup doesn't fit, skip some
	    // columns when displaying the window, minus left border and
	    // padding.
	    if (-leftoff > left_extra)
		wp->w_leftcol = -leftoff - left_extra;
	    wp->w_width -= wp->w_leftcol;
	    wp->w_popup_leftoff = -leftoff;
	    if (wp->w_width < 0)
		wp->w_width = 0;
	}
    }

    if (wp->w_p_wrap || (!wp->w_popup_fixed
			    && (wp->w_popup_pos == POPPOS_TOPLEFT
				|| wp->w_popup_pos == POPPOS_BOTLEFT)))
    {
	int want_col = 0;

	// try to show the right border and any scrollbar
	want_col = left_extra + wp->w_width + right_extra;
	if (want_col > 0 && wp->w_wincol > 0
					 && wp->w_wincol + want_col >= Columns)
	{
	    wp->w_wincol = Columns - want_col;
	    if (wp->w_wincol < 0)
		wp->w_wincol = 0;
	}
    }

    wp->w_height = wp->w_buffer->b_ml.ml_line_count - wp->w_topline
								 + 1 + wrapped;
    if (minheight > 0 && wp->w_height < minheight)
	wp->w_height = minheight;
    if (maxheight > 0 && wp->w_height > maxheight)
	wp->w_height = maxheight;
    w_height_before_limit = wp->w_height;
    if (wp->w_height > Rows - wp->w_winrow)
	wp->w_height = Rows - wp->w_winrow;

    if (center_vert)
    {
	wp->w_winrow = (Rows - wp->w_height - extra_height) / 2;
	if (wp->w_winrow < 0)
	    wp->w_winrow = 0;
    }
    else if (wp->w_popup_pos == POPPOS_BOTRIGHT
		|| wp->w_popup_pos == POPPOS_BOTLEFT)
    {
	if ((wp->w_height + extra_height) <= wantline)
	    // bottom aligned: may move down
	    wp->w_winrow = wantline - (wp->w_height + extra_height);
	else if (wantline * 2 >= Rows || !(wp->w_popup_flags & POPF_POSINVERT))
	{
	    // Bottom aligned but does not fit, and less space on the other
	    // side or "posinvert" is off: reduce height.
	    wp->w_winrow = 0;
	    wp->w_height = wantline - extra_height;
	}
	else
	{
	    // Not enough space and more space on the other side: make top
	    // aligned.
	    wp->w_winrow = (wantline < 0 ? 0 : wantline) + 1;
	    adjust_height_for_top_aligned = TRUE;
	}
    }
    else if (wp->w_popup_pos == POPPOS_TOPRIGHT
		|| wp->w_popup_pos == POPPOS_TOPLEFT)
    {
	if (wp != popup_dragwin
		&& wantline + (wp->w_height + extra_height) - 1 > Rows
		&& wantline * 2 > Rows
		&& (wp->w_popup_flags & POPF_POSINVERT))
	{
	    // top aligned and not enough space below but there is space above:
	    // make bottom aligned and recompute the height
	    wp->w_height = w_height_before_limit;
	    wp->w_winrow = wantline - 2 - wp->w_height - extra_height;
	    if (wp->w_winrow < 0)
	    {
		wp->w_height += wp->w_winrow;
		wp->w_winrow = 0;
	    }
	}
	else
	{
	    wp->w_winrow = wantline - 1;
	    adjust_height_for_top_aligned = TRUE;
	}
    }

    if (adjust_height_for_top_aligned && wp->w_want_scrollbar
			  && wp->w_winrow + wp->w_height + extra_height > Rows)
    {
	// Bottom of the popup goes below the last line, reduce the height and
	// add a scrollbar.
	wp->w_height = Rows - wp->w_winrow - extra_height;
#ifdef FEAT_TERMINAL
	if (wp->w_buffer->b_term == NULL || term_is_finished(wp->w_buffer))
#endif
	{
	    wp->w_has_scrollbar = TRUE;
	    if (width_with_scrollbar > 0)
		wp->w_width = width_with_scrollbar;
	}
    }

    // make sure w_winrow is valid
    if (wp->w_winrow >= Rows)
	wp->w_winrow = Rows - 1;
    else if (wp->w_winrow < 0)
	wp->w_winrow = 0;

    if (wp->w_height != org_height)
	win_comp_scroll(wp);

    wp->w_popup_last_changedtick = CHANGEDTICK(wp->w_buffer);
    if (win_valid(wp->w_popup_prop_win))
    {
	wp->w_popup_prop_changedtick =
				   CHANGEDTICK(wp->w_popup_prop_win->w_buffer);
	wp->w_popup_prop_topline = wp->w_popup_prop_win->w_topline;
    }

    // Need to update popup_mask if the position or size changed.
    // And redraw windows and statuslines that were behind the popup.
    if (org_winrow != wp->w_winrow
	    || org_wincol != wp->w_wincol
	    || org_leftcol != wp->w_leftcol
	    || org_leftoff != wp->w_popup_leftoff
	    || org_width != wp->w_width
	    || org_height != wp->w_height)
    {
	redraw_win_later(wp, UPD_NOT_VALID);
	if (wp->w_popup_flags & POPF_ON_CMDLINE)
	    clear_cmdline = TRUE;
	popup_mask_refresh = TRUE;
    }
}

typedef enum
{
    TYPE_NORMAL,
    TYPE_ATCURSOR,
    TYPE_BEVAL,
    TYPE_NOTIFICATION,
    TYPE_MESSAGE_WIN,	// similar to TYPE_NOTIFICATION
    TYPE_DIALOG,
    TYPE_MENU,
    TYPE_PREVIEW,	// preview window
    TYPE_INFO		// popup menu info
} create_type_T;

/*
 * Return TRUE if "type" is TYPE_NOTIFICATION or TYPE_MESSAGE_WIN.
 */
    static int
popup_is_notification(create_type_T type)
{
    return type == TYPE_NOTIFICATION || type == TYPE_MESSAGE_WIN;
}

/*
 * Make "buf" empty and set the contents to "text".
 * Used by popup_create() and popup_settext().
 */
    static void
popup_set_buffer_text(buf_T *buf, typval_T text)
{
    int	    lnum;

    // Clear the buffer, then replace the lines.
    curbuf = buf;
    for (lnum = buf->b_ml.ml_line_count; lnum > 0; --lnum)
	ml_delete(lnum);
    curbuf = curwin->w_buffer;

    // Add text to the buffer.
    if (text.v_type == VAR_STRING)
    {
	char_u *s = text.vval.v_string;

	// just a string
	ml_append_buf(buf, 0, s == NULL ? (char_u *)"" : s, (colnr_T)0, TRUE);
    }
    else
    {
	list_T *l = text.vval.v_list;

	if (l != NULL && l->lv_len > 0)
	{
	    if (l->lv_first == &range_list_item)
		emsg(_(e_using_number_as_string));
	    else if (l->lv_first->li_tv.v_type == VAR_STRING)
		// list of strings
		add_popup_strings(buf, l);
	    else
		// list of dictionaries
		add_popup_dicts(buf, l);
	}
    }

    // delete the line that was in the empty buffer
    curbuf = buf;
    ml_delete(buf->b_ml.ml_line_count);
    curbuf = curwin->w_buffer;
}

/*
 * Parse the 'previewpopup' or 'completepopup' option and apply the values to
 * window "wp" if it is not NULL.
 * Return FAIL if the parsing fails.
 */
    static int
parse_popup_option(win_T *wp, int is_preview)
{
    char_u *p =
#ifdef FEAT_QUICKFIX
	!is_preview ? p_cpp :
#endif
	p_pvp;

    if (wp != NULL)
	wp->w_popup_flags &= ~POPF_INFO_MENU;

    for ( ; *p != NUL; p += (*p == ',' ? 1 : 0))
    {
	char_u	*e, *dig;
	char_u	*s = p;
	int	x;

	e = vim_strchr(p, ':');
	if (e == NULL || e[1] == NUL)
	    return FAIL;

	p = vim_strchr(e, ',');
	if (p == NULL)
	    p = e + STRLEN(e);
	dig = e + 1;
	x = getdigits(&dig);

	if (STRNCMP(s, "height:", 7) == 0)
	{
	    if (dig != p)
		return FAIL;
	    if (wp != NULL)
	    {
		if (is_preview)
		    wp->w_minheight = x;
		wp->w_maxheight = x;
	    }
	}
	else if (STRNCMP(s, "width:", 6) == 0)
	{
	    if (dig != p)
		return FAIL;
	    if (wp != NULL)
	    {
		if (is_preview)
		    wp->w_minwidth = x;
		wp->w_maxwidth = x;
		wp->w_maxwidth_opt = x;
	    }
	}
	else if (STRNCMP(s, "highlight:", 10) == 0)
	{
	    if (wp != NULL)
	    {
		int c = *p;

		*p = NUL;
		set_string_option_direct_in_win(wp, (char_u *)"wincolor", -1,
						s + 10, OPT_FREE|OPT_LOCAL, 0);
		*p = c;
	    }
	}
	else if (STRNCMP(s, "border:", 7) == 0)
	{
	    char_u	*arg = s + 7;
	    int		on = STRNCMP(arg, "on", 2) == 0 && arg + 2 == p;
	    int		off = STRNCMP(arg, "off", 3) == 0 && arg + 3 == p;
	    int		i;

	    if (!on && !off)
		return FAIL;
	    if (wp != NULL)
	    {
		for (i = 0; i < 4; ++i)
		    wp->w_popup_border[i] = on ? 1 : 0;
		if (off)
		    // only show the X for close when there is a border
		    wp->w_popup_close = POPCLOSE_NONE;
	    }
	}
	else if (STRNCMP(s, "align:", 6) == 0)
	{
	    char_u	*arg = s + 6;
	    int		item = STRNCMP(arg, "item", 4) == 0 && arg + 4 == p;
	    int		menu = STRNCMP(arg, "menu", 4) == 0 && arg + 4 == p;

	    if (!menu && !item)
		return FAIL;
	    if (wp != NULL && menu)
		wp->w_popup_flags |= POPF_INFO_MENU;
	}
	else
	    return FAIL;
    }
    return OK;
}

/*
 * Parse the 'previewpopup' option and apply the values to window "wp" if it
 * is not NULL.
 * Return FAIL if the parsing fails.
 */
    int
parse_previewpopup(win_T *wp)
{
    return parse_popup_option(wp, TRUE);
}

/*
 * Parse the 'completepopup' option and apply the values to window "wp" if it
 * is not NULL.
 * Return FAIL if the parsing fails.
 */
    int
parse_completepopup(win_T *wp)
{
    return parse_popup_option(wp, FALSE);
}

/*
 * Set w_wantline and w_wantcol for the cursor position in the current window.
 * Keep at least "width" columns from the right of the screen.
 */
    void
popup_set_wantpos_cursor(win_T *wp, int width, dict_T *d)
{
    poppos_T ppt = POPPOS_NONE;

    if (d != NULL)
	ppt = get_pos_entry(d, FALSE);

    setcursor_mayforce(TRUE);
    if (ppt == POPPOS_TOPRIGHT || ppt == POPPOS_TOPLEFT)
    {
	wp->w_wantline = curwin->w_winrow + curwin->w_wrow + 2;
    }
    else
    {
	wp->w_wantline = curwin->w_winrow + curwin->w_wrow;
	if (wp->w_wantline == 0)  // cursor in first line
	{
	    wp->w_wantline = 2;
	    wp->w_popup_pos = ppt == POPPOS_BOTRIGHT
					    ? POPPOS_TOPRIGHT : POPPOS_TOPLEFT;
	}
    }

    wp->w_wantcol = curwin->w_wincol + curwin->w_wcol + 1;
    if (wp->w_wantcol > Columns - width)
    {
	wp->w_wantcol = Columns - width;
	if (wp->w_wantcol < 1)
	    wp->w_wantcol = 1;
    }

    popup_adjust_position(wp);
}

/*
 * Set w_wantline and w_wantcol for the a given screen position.
 * Caller must take care of running into the window border.
 */
    void
popup_set_wantpos_rowcol(win_T *wp, int row, int col)
{
    wp->w_wantline = row;
    wp->w_wantcol = col;
    popup_adjust_position(wp);
}

/*
 * Add a border and lef&right padding.
 */
    static void
add_border_left_right_padding(win_T *wp)
{
    int i;

    for (i = 0; i < 4; ++i)
    {
	wp->w_popup_border[i] = 1;
	wp->w_popup_padding[i] = (i & 1) ? 1 : 0;
    }
}

#ifdef FEAT_TERMINAL
/*
 * Return TRUE if there is any popup window with a terminal buffer.
 */
    static int
popup_terminal_exists(void)
{
    win_T	*wp;
    tabpage_T	*tp;

    FOR_ALL_POPUPWINS(wp)
	if (wp->w_buffer->b_term != NULL)
	    return TRUE;
    FOR_ALL_TABPAGES(tp)
	FOR_ALL_POPUPWINS_IN_TAB(tp, wp)
	    if (wp->w_buffer->b_term != NULL)
		return TRUE;
    return FALSE;
}
#endif

/*
 * Mark all popup windows in the current tab and global for redrawing.
 */
    void
popup_redraw_all(void)
{
    win_T	*wp;

    FOR_ALL_POPUPWINS(wp)
	wp->w_redr_type = UPD_NOT_VALID;
    FOR_ALL_POPUPWINS_IN_TAB(curtab, wp)
	wp->w_redr_type = UPD_NOT_VALID;
}

/*
 * Set the color for a notification window.
 */
    static void
popup_update_color(win_T *wp, create_type_T type)
{
    char    *hiname = type == TYPE_MESSAGE_WIN
				       ? "MessageWindow" : "PopupNotification";
    int		nr = syn_name2id((char_u *)hiname);

    set_string_option_direct_in_win(wp, (char_u *)"wincolor", -1,
		(char_u *)(nr == 0 ? "WarningMsg" : hiname),
		OPT_FREE|OPT_LOCAL, 0);
}

/*
 * popup_create({text}, {options})
 * popup_atcursor({text}, {options})
 * etc.
 * When creating a preview or info popup "argvars" and "rettv" are NULL.
 */
    static win_T *
popup_create(typval_T *argvars, typval_T *rettv, create_type_T type)
{
    win_T	*wp;
    tabpage_T	*tp = NULL;
    int		tabnr = 0;
    int		new_buffer;
    buf_T	*buf = NULL;
    dict_T	*d = NULL;
    int		i;

    if (argvars != NULL)
    {
	if (in_vim9script()
		&& (check_for_string_or_number_or_list_arg(argvars, 0) == FAIL
		    || check_for_dict_arg(argvars, 1) == FAIL))
	    return NULL;

	// Check that arguments look OK.
	if (argvars[0].v_type == VAR_NUMBER)
	{
	    buf = buflist_findnr(argvars[0].vval.v_number);
	    if (buf == NULL)
	    {
		semsg(_(e_buffer_nr_does_not_exist), argvars[0].vval.v_number);
		return NULL;
	    }
#ifdef FEAT_TERMINAL
	    if (buf->b_term != NULL && popup_terminal_exists())
	    {
		emsg(_(e_cannot_open_second_popup_with_terminal));
		return NULL;
	    }
#endif
	}
	else if (!(argvars[0].v_type == VAR_STRING
			&& argvars[0].vval.v_string != NULL)
		    && !(argvars[0].v_type == VAR_LIST
			&& argvars[0].vval.v_list != NULL))
	{
	    emsg(_(e_buffer_number_text_or_list_required));
	    return NULL;
	}
	if (check_for_nonnull_dict_arg(argvars, 1) == FAIL)
	    return NULL;
	d = argvars[1].vval.v_dict;
    }

    if (d != NULL)
    {
	if (dict_has_key(d, "tabpage"))
	    tabnr = (int)dict_get_number(d, "tabpage");
	else if (popup_is_notification(type))
	    tabnr = -1;  // notifications are global by default
	else
	    tabnr = 0;
	if (tabnr > 0)
	{
	    tp = find_tabpage(tabnr);
	    if (tp == NULL)
	    {
		semsg(_(e_tabpage_not_found_nr), tabnr);
		return NULL;
	    }
	}
    }
    else if (popup_is_notification(type))
	tabnr = -1;  // show on all tabs

    // Create the window and buffer.
    wp = win_alloc_popup_win();
    if (wp == NULL)
	return NULL;
    if (rettv != NULL)
	rettv->vval.v_number = wp->w_id;
    wp->w_popup_pos = POPPOS_TOPLEFT;
    wp->w_popup_flags = POPF_IS_POPUP | POPF_MAPPING | POPF_POSINVERT;

    if (buf != NULL)
    {
	// use existing buffer
	new_buffer = FALSE;
	win_init_popup_win(wp, buf);
	set_local_options_default(wp, FALSE);
	swap_exists_action = SEA_READONLY;
	buffer_ensure_loaded(buf);
	swap_exists_action = SEA_NONE;
    }
    else
    {
	// create a new buffer associated with the popup
	new_buffer = TRUE;
	buf = buflist_new(NULL, NULL, (linenr_T)0, BLN_NEW|BLN_DUMMY|BLN_REUSE);
	if (buf == NULL)
	{
	    win_free_popup(wp);
	    return NULL;
	}
	ml_open(buf);

	win_init_popup_win(wp, buf);

	set_local_options_default(wp, TRUE);
	set_string_option_direct_in_buf(buf, (char_u *)"buftype", -1,
				     (char_u *)"popup", OPT_FREE|OPT_LOCAL, 0);
	set_string_option_direct_in_buf(buf, (char_u *)"bufhidden", -1,
				      (char_u *)"wipe", OPT_FREE|OPT_LOCAL, 0);
	buf->b_p_ul = -1;	// no undo
	buf->b_p_swf = FALSE;   // no swap file
	buf->b_p_bl = FALSE;    // unlisted buffer
	buf->b_locked = TRUE;	// prevent deleting the buffer

	// Avoid that 'buftype' is reset when this buffer is entered.
	buf->b_p_initialized = TRUE;
    }
    wp->w_p_wrap = TRUE;	// 'wrap' is default on
    wp->w_p_so = 0;		// 'scrolloff' zero

    if (tp != NULL)
    {
	// popup on specified tab page
	wp->w_next = tp->tp_first_popupwin;
	tp->tp_first_popupwin = wp;
    }
    else if (tabnr == 0)
    {
	// popup on current tab page
	wp->w_next = curtab->tp_first_popupwin;
	curtab->tp_first_popupwin = wp;
    }
    else // (tabnr < 0)
    {
	win_T *prev = first_popupwin;

	// Global popup: add at the end, so that it gets displayed on top of
	// older ones with the same zindex. Matters for notifications.
	if (first_popupwin == NULL)
	    first_popupwin = wp;
	else
	{
	    while (prev->w_next != NULL)
		prev = prev->w_next;
	    prev->w_next = wp;
	}
    }

    if (new_buffer && argvars != NULL)
	popup_set_buffer_text(buf, argvars[0]);

    if (type == TYPE_ATCURSOR || type == TYPE_PREVIEW)
    {
	wp->w_popup_pos = POPPOS_BOTLEFT;
    }
    if (type == TYPE_ATCURSOR)
    {
	popup_set_wantpos_cursor(wp, 0, d);
	set_moved_values(wp);
	set_moved_columns(wp, FIND_STRING);
    }

    if (type == TYPE_BEVAL)
    {
	wp->w_popup_pos = POPPOS_BOTLEFT;

	// by default use the mouse position
	wp->w_wantline = mouse_row;
	if (wp->w_wantline <= 0)  // mouse on first line
	{
	    wp->w_wantline = 2;
	    wp->w_popup_pos = POPPOS_TOPLEFT;
	}
	wp->w_wantcol = mouse_col + 1;
	set_mousemoved_values(wp);
	set_mousemoved_columns(wp, FIND_IDENT + FIND_STRING + FIND_EVAL);
    }

    // set default values
    wp->w_zindex = POPUPWIN_DEFAULT_ZINDEX;
    wp->w_popup_close = POPCLOSE_NONE;

    if (popup_is_notification(type))
    {
	win_T  *twp, *nextwin;
	int	height = buf->b_ml.ml_line_count + 3;

	// Try to not overlap with another global popup.  Guess we need 3
	// more screen lines than buffer lines.
	wp->w_wantline = 1;
	for (twp = first_popupwin; twp != NULL; twp = nextwin)
	{
	    nextwin = twp->w_next;
	    if (twp != wp
		    && twp->w_zindex == POPUPWIN_NOTIFICATION_ZINDEX
		    && twp->w_winrow <= wp->w_wantline - 1 + height
		    && twp->w_winrow + popup_height(twp) > wp->w_wantline - 1)
	    {
		// move to below this popup and restart the loop to check for
		// overlap with other popups
		wp->w_wantline = twp->w_winrow + popup_height(twp) + 1;
		nextwin = first_popupwin;
	    }
	}
	if (wp->w_wantline + height > Rows)
	{
	    // can't avoid overlap, put on top in the hope that message goes
	    // away soon.
	    wp->w_wantline = 1;
	}

	wp->w_wantcol = 10;
	wp->w_zindex = POPUPWIN_NOTIFICATION_ZINDEX;
	wp->w_minwidth = 20;
	wp->w_popup_flags |= POPF_DRAG;
	wp->w_popup_close = POPCLOSE_CLICK;
	for (i = 0; i < 4; ++i)
	    wp->w_popup_border[i] = 1;
	wp->w_popup_padding[1] = 1;
	wp->w_popup_padding[3] = 1;

	popup_update_color(wp, type);
    }

    if (type == TYPE_DIALOG || type == TYPE_MENU)
    {
	wp->w_popup_pos = POPPOS_CENTER;
	wp->w_zindex = POPUPWIN_DIALOG_ZINDEX;
	wp->w_popup_flags |= POPF_DRAG;
	wp->w_popup_flags &= ~POPF_MAPPING;
	add_border_left_right_padding(wp);
    }

    if (type == TYPE_MENU)
    {
	typval_T	tv;
	callback_T	callback;

	tv.v_type = VAR_STRING;
	tv.vval.v_string = (char_u *)"popup_filter_menu";
	callback = get_callback(&tv);
	if (callback.cb_name != NULL)
	{
	    set_callback(&wp->w_filter_cb, &callback);
	    if (callback.cb_free_name)
		vim_free(callback.cb_name);
	}

	wp->w_p_wrap = 0;
	wp->w_popup_flags |= POPF_CURSORLINE;
    }

    if (type == TYPE_PREVIEW)
    {
	wp->w_popup_flags |= POPF_DRAG | POPF_RESIZE;
	wp->w_popup_close = POPCLOSE_BUTTON;
	for (i = 0; i < 4; ++i)
	    wp->w_popup_border[i] = 1;
	parse_previewpopup(wp);
	popup_set_wantpos_cursor(wp, wp->w_minwidth, d);
    }
# ifdef FEAT_QUICKFIX
    if (type == TYPE_INFO)
    {
	wp->w_popup_pos = POPPOS_TOPLEFT;
	wp->w_popup_flags |= POPF_DRAG | POPF_RESIZE;
	wp->w_popup_close = POPCLOSE_BUTTON;
	add_border_left_right_padding(wp);
	parse_completepopup(wp);
    }
# endif

    for (i = 0; i < 4; ++i)
	VIM_CLEAR(wp->w_border_highlight[i]);
    for (i = 0; i < 8; ++i)
	wp->w_border_char[i] = 0;
    wp->w_want_scrollbar = 1;
    wp->w_popup_fixed = 0;
    wp->w_filter_mode = MODE_ALL;

    if (d != NULL)
	// Deal with options.
	apply_options(wp, d, TRUE);

#ifdef FEAT_TIMERS
    if (popup_is_notification(type) && wp->w_popup_timer == NULL)
	popup_add_timeout(wp, 3000, type == TYPE_NOTIFICATION);
#endif

    popup_adjust_position(wp);

    wp->w_vsep_width = 0;

    redraw_all_later(UPD_NOT_VALID);
    popup_mask_refresh = TRUE;

#ifdef FEAT_TERMINAL
    // When running a terminal in the popup it becomes the current window.
    if (buf->b_term != NULL)
	win_enter(wp, FALSE);
#endif

    return wp;
}

/*
 * popup_clear()
 */
    void
f_popup_clear(typval_T *argvars, typval_T *rettv UNUSED)
{
    int force = FALSE;

    if (in_vim9script() && check_for_opt_bool_arg(argvars, 0) == FAIL)
	return;

    if (argvars[0].v_type != VAR_UNKNOWN)
	force = (int)tv_get_bool(&argvars[0]);
    close_all_popups(force);
}

/*
 * popup_create({text}, {options})
 */
    void
f_popup_create(typval_T *argvars, typval_T *rettv)
{
    popup_create(argvars, rettv, TYPE_NORMAL);
}

/*
 * popup_atcursor({text}, {options})
 */
    void
f_popup_atcursor(typval_T *argvars, typval_T *rettv)
{
    popup_create(argvars, rettv, TYPE_ATCURSOR);
}

/*
 * popup_beval({text}, {options})
 */
    void
f_popup_beval(typval_T *argvars, typval_T *rettv)
{
    popup_create(argvars, rettv, TYPE_BEVAL);
}

/*
 * Invoke the close callback for window "wp" with value "result".
 * Careful: The callback may make "wp" invalid!
 */
    static void
invoke_popup_callback(win_T *wp, typval_T *result)
{
    typval_T	rettv;
    typval_T	argv[3];

    argv[0].v_type = VAR_NUMBER;
    argv[0].vval.v_number = (varnumber_T)wp->w_id;

    if (result != NULL && result->v_type != VAR_UNKNOWN)
	copy_tv(result, &argv[1]);
    else
    {
	argv[1].v_type = VAR_NUMBER;
	argv[1].vval.v_number = 0;
    }

    argv[2].v_type = VAR_UNKNOWN;

    call_callback(&wp->w_close_cb, -1, &rettv, 2, argv);
    if (result != NULL)
	clear_tv(&argv[1]);
    clear_tv(&rettv);
}

/*
 * Make "prevwin" the current window, unless it's equal to "wp".
 * Otherwise make "firstwin" the current window.
 */
    static void
back_to_prevwin(win_T *wp)
{
    if (win_valid(prevwin) && wp != prevwin)
	win_enter(prevwin, FALSE);
    else
	win_enter(firstwin, FALSE);
}

/*
 * Close popup "wp" and invoke any close callback for it.
 */
    static void
popup_close_and_callback(win_T *wp, typval_T *arg)
{
    int id = wp->w_id;

#ifdef FEAT_TERMINAL
    if (wp == curwin && curbuf->b_term != NULL)
    {
	win_T *owp;

	// Closing popup window with a terminal: put focus back on the first
	// that works:
	// - another popup window with a terminal
	// - the previous window
	// - the first one.
	FOR_ALL_POPUPWINS(owp)
	    if (owp != curwin && owp->w_buffer->b_term != NULL)
		break;
	if (owp != NULL)
	    win_enter(owp, FALSE);
	else
	{
	    for (owp = curtab->tp_first_popupwin; owp != NULL;
							     owp = owp->w_next)
		if (owp != curwin && owp->w_buffer->b_term != NULL)
		    break;
	    if (owp != NULL)
		win_enter(owp, FALSE);
	    else
		back_to_prevwin(wp);
	}
    }
#endif

    // Just in case a check higher up is missing.
    if (wp == curwin && ERROR_IF_POPUP_WINDOW)
    {
	// To avoid getting stuck when win_execute() does something that causes
	// an error, stop calling the filter callback.
	free_callback(&wp->w_filter_cb);

	return;
    }

    CHECK_CURBUF;
    if (wp->w_close_cb.cb_name != NULL)
	// Careful: This may make "wp" invalid.
	invoke_popup_callback(wp, arg);

    popup_close(id, FALSE);
    CHECK_CURBUF;
}

    void
popup_close_with_retval(win_T *wp, int retval)
{
    typval_T res;

    res.v_type = VAR_NUMBER;
    res.vval.v_number = retval;
    popup_close_and_callback(wp, &res);
}

/*
 * Close popup "wp" because of a mouse click.
 */
    void
popup_close_for_mouse_click(win_T *wp)
{
    popup_close_with_retval(wp, -2);
}

    static void
check_mouse_moved(win_T *wp, win_T *mouse_wp)
{
    // Close the popup when all if these are true:
    // - the mouse is not on this popup
    // - "mousemoved" was used
    // - the mouse is no longer on the same screen row or the mouse column is
    //   outside of the relevant text
    if (wp != mouse_wp
	    && wp->w_popup_mouse_row != 0
	    && (wp->w_popup_mouse_row != mouse_row
		|| mouse_col < wp->w_popup_mouse_mincol
		|| mouse_col > wp->w_popup_mouse_maxcol))
    {
	// Careful: this makes "wp" invalid.
	popup_close_with_retval(wp, -2);
    }
}

/*
 * Called when the mouse moved: may close a popup with "mousemoved".
 */
    void
popup_handle_mouse_moved(void)
{
    win_T   *wp, *nextwp;
    win_T   *mouse_wp;
    int	    row = mouse_row;
    int	    col = mouse_col;

    // find the window where the mouse is in
    mouse_wp = mouse_find_win(&row, &col, FIND_POPUP);

    for (wp = first_popupwin; wp != NULL; wp = nextwp)
    {
	nextwp = wp->w_next;
	check_mouse_moved(wp, mouse_wp);
    }
    for (wp = curtab->tp_first_popupwin; wp != NULL; wp = nextwp)
    {
	nextwp = wp->w_next;
	check_mouse_moved(wp, mouse_wp);
    }
}

/*
 * In a filter: check if the typed key is a mouse event that is used for
 * dragging the popup.
 */
    static void
filter_handle_drag(win_T *wp, int c, typval_T *rettv)
{
    int	row = mouse_row;
    int	col = mouse_col;

    if ((wp->w_popup_flags & (POPF_DRAG | POPF_DRAGALL))
	    && is_mouse_key(c)
	    && (wp == popup_dragwin
			  || wp == mouse_find_win(&row, &col, FIND_POPUP)))
	// do not consume the key, allow for dragging the popup
	rettv->vval.v_number = 0;
}

/*
 * popup_filter_menu({id}, {key})
 */
    void
f_popup_filter_menu(typval_T *argvars, typval_T *rettv)
{
    int		id;
    win_T	*wp;
    char_u	*key;
    typval_T	res;
    int		c;
    linenr_T	old_lnum;

    if (in_vim9script()
	    && (check_for_number_arg(argvars, 0) == FAIL
		|| check_for_string_arg(argvars, 1) == FAIL))
	return;

    id = tv_get_number(&argvars[0]);
    wp = win_id2wp(id);
    key = tv_get_string(&argvars[1]);
    // If the popup has been closed do not consume the key.
    if (wp == NULL)
	return;

    c = *key;
    if (c == K_SPECIAL && key[1] != NUL)
	c = TO_SPECIAL(key[1], key[2]);

    // consume all keys until done
    rettv->v_type = VAR_BOOL;
    rettv->vval.v_number = VVAL_TRUE;
    res.v_type = VAR_NUMBER;

    old_lnum = wp->w_cursor.lnum;
    if ((c == 'k' || c == 'K' || c == K_UP || c == Ctrl_P)
						      && wp->w_cursor.lnum > 1)
	--wp->w_cursor.lnum;
    if ((c == 'j' || c == 'J' || c == K_DOWN || c == Ctrl_N)
		       && wp->w_cursor.lnum < wp->w_buffer->b_ml.ml_line_count)
	++wp->w_cursor.lnum;
    if (old_lnum != wp->w_cursor.lnum)
    {
	// caller will call popup_highlight_curline()
	return;
    }

    if (c == 'x' || c == 'X' || c == ESC || c == Ctrl_C)
    {
	// Cancelled, invoke callback with -1
	res.vval.v_number = -1;
	popup_close_and_callback(wp, &res);
	return;
    }
    if (c == ' ' || c == K_KENTER || c == CAR || c == NL)
    {
	// Invoke callback with current index.
	res.vval.v_number = wp->w_cursor.lnum;
	popup_close_and_callback(wp, &res);
	return;
    }

    filter_handle_drag(wp, c, rettv);
}

/*
 * popup_filter_yesno({id}, {key})
 */
    void
f_popup_filter_yesno(typval_T *argvars, typval_T *rettv)
{
    int		id;
    win_T	*wp;
    char_u	*key;
    typval_T	res;
    int		c;

    if (in_vim9script()
	    && (check_for_number_arg(argvars, 0) == FAIL
		|| check_for_string_arg(argvars, 1) == FAIL))
	return;

    id = tv_get_number(&argvars[0]);
    wp = win_id2wp(id);
    key = tv_get_string(&argvars[1]);
    // If the popup has been closed don't consume the key.
    if (wp == NULL)
	return;

    c = *key;
    if (c == K_SPECIAL && key[1] != NUL)
	c = TO_SPECIAL(key[1], key[2]);

    // consume all keys until done
    rettv->v_type = VAR_BOOL;
    rettv->vval.v_number = VVAL_TRUE;

    if (c == 'y' || c == 'Y')
	res.vval.v_number = 1;
    else if (c == 'n' || c == 'N' || c == 'x' || c == 'X' || c == ESC)
	res.vval.v_number = 0;
    else
    {
	filter_handle_drag(wp, c, rettv);
	return;
    }

    // Invoke callback
    res.v_type = VAR_NUMBER;
    popup_close_and_callback(wp, &res);
}

/*
 * popup_dialog({text}, {options})
 */
    void
f_popup_dialog(typval_T *argvars, typval_T *rettv)
{
    popup_create(argvars, rettv, TYPE_DIALOG);
}

/*
 * popup_menu({text}, {options})
 */
    void
f_popup_menu(typval_T *argvars, typval_T *rettv)
{
    popup_create(argvars, rettv, TYPE_MENU);
}

/*
 * popup_notification({text}, {options})
 */
    void
f_popup_notification(typval_T *argvars, typval_T *rettv)
{
    popup_create(argvars, rettv, TYPE_NOTIFICATION);
}

/*
 * Find the popup window with window-ID "id".
 * If the popup window does not exist NULL is returned.
 * If the window is not a popup window, and error message is given.
 */
    static win_T *
find_popup_win(int id)
{
    win_T *wp = win_id2wp(id);

    if (wp != NULL && !WIN_IS_POPUP(wp))
    {
	semsg(_(e_window_nr_is_not_popup_window), id);
	return NULL;
    }
    return wp;
}

/*
 * popup_close({id})
 */
    void
f_popup_close(typval_T *argvars, typval_T *rettv UNUSED)
{
    int		id;
    win_T	*wp;

    if (in_vim9script() && check_for_number_arg(argvars, 0) == FAIL)
	return;

    id = (int)tv_get_number(argvars);
    if (
# ifdef FEAT_TERMINAL
	// if the popup contains a terminal it will become hidden
	curbuf->b_term == NULL &&
# endif
	    ERROR_IF_ANY_POPUP_WINDOW)
	return;

    wp = find_popup_win(id);
    if (wp != NULL)
	popup_close_and_callback(wp, &argvars[1]);
}

    void
popup_hide(win_T *wp)
{
#ifdef FEAT_TERMINAL
    if (error_if_term_popup_window())
	return;
#endif
    if ((wp->w_popup_flags & POPF_HIDDEN) != 0)
	return;

    wp->w_popup_flags |= POPF_HIDDEN;
    // Do not decrement b_nwindows, we still reference the buffer.
    redraw_all_later(UPD_NOT_VALID);
    popup_mask_refresh = TRUE;
}

/*
 * popup_hide({id})
 */
    void
f_popup_hide(typval_T *argvars, typval_T *rettv UNUSED)
{
    int		id;
    win_T	*wp;

    if (in_vim9script() && check_for_number_arg(argvars, 0) == FAIL)
	return;

    id = (int)tv_get_number(argvars);
    wp = find_popup_win(id);
    if (wp == NULL)
	return;

    popup_hide(wp);
    wp->w_popup_flags |= POPF_HIDDEN_FORCE;
}

    void
popup_show(win_T *wp)
{
    if ((wp->w_popup_flags & POPF_HIDDEN) == 0)
	return;

    wp->w_popup_flags &= ~POPF_HIDDEN;
    redraw_all_later(UPD_NOT_VALID);
    popup_mask_refresh = TRUE;
}

/*
 * popup_show({id})
 */
    void
f_popup_show(typval_T *argvars, typval_T *rettv UNUSED)
{
    int		id;
    win_T	*wp;

    if (in_vim9script() && check_for_number_arg(argvars, 0) == FAIL)
	return;

    id = (int)tv_get_number(argvars);
    wp = find_popup_win(id);
    if (wp == NULL)
	return;

    wp->w_popup_flags &= ~POPF_HIDDEN_FORCE;
    popup_show(wp);
#ifdef FEAT_QUICKFIX
    if (wp->w_popup_flags & POPF_INFO)
	pum_position_info_popup(wp);
#endif
}

/*
 * popup_settext({id}, {text})
 */
    void
f_popup_settext(typval_T *argvars, typval_T *rettv UNUSED)
{
    int		id;
    win_T	*wp;

    if (in_vim9script()
	    && (check_for_number_arg(argvars, 0) == FAIL
		|| check_for_string_or_list_arg(argvars, 1) == FAIL))
	return;

    id = (int)tv_get_number(&argvars[0]);
    wp = find_popup_win(id);
    if (wp == NULL)
	return;

    if (check_for_string_or_list_arg(argvars, 1) == FAIL)
	return;

    popup_set_buffer_text(wp->w_buffer, argvars[1]);
    redraw_win_later(wp, UPD_NOT_VALID);
    popup_adjust_position(wp);
}

    static void
popup_free(win_T *wp)
{
    sign_undefine_by_name(popup_get_sign_name(wp), FALSE);
    wp->w_buffer->b_locked = FALSE;
    if (wp->w_winrow + popup_height(wp) >= cmdline_row)
	clear_cmdline = TRUE;
    win_free_popup(wp);

#ifdef HAS_MESSAGE_WINDOW
    if (wp == message_win)
	message_win = NULL;
#endif

    redraw_all_later(UPD_NOT_VALID);
    popup_mask_refresh = TRUE;
}

    static void
error_for_popup_window(void)
{
    emsg(_(e_not_allowed_in_popup_window));
}

    int
error_if_popup_window(int also_with_term UNUSED)
{
    // win_execute() may set "curwin" to a popup window temporarily, but many
    // commands are disallowed then.  When a terminal runs in the popup most
    // things are allowed.  When a terminal is finished it can be closed.
    if (WIN_IS_POPUP(curwin)
# ifdef FEAT_TERMINAL
	    && (also_with_term || curbuf->b_term == NULL)
# endif
	    )
    {
	error_for_popup_window();
	return TRUE;
    }
    return FALSE;
}

/*
 * Close a popup window by Window-id.
 * Does not invoke the callback.
 * Return OK if the popup was closed, FAIL otherwise.
 */
    int
popup_close(int id, int force)
{
    win_T	*wp;
    tabpage_T	*tp;
    win_T	*prev = NULL;

    // go through global popups
    for (wp = first_popupwin; wp != NULL; prev = wp, wp = wp->w_next)
	if (wp->w_id == id)
	{
	    if (wp == curwin)
	    {
		if (!force)
		{
		    error_for_popup_window();
		    return FAIL;
		}
		back_to_prevwin(wp);
	    }
	    if (prev == NULL)
		first_popupwin = wp->w_next;
	    else
		prev->w_next = wp->w_next;
	    popup_free(wp);
	    return OK;
	}

    // go through tab-local popups
    FOR_ALL_TABPAGES(tp)
	if (popup_close_tabpage(tp, id, force) == OK)
	    return OK;
    return FAIL;
}

/*
 * Close a popup window with Window-id "id" in tabpage "tp".
 */
    int
popup_close_tabpage(tabpage_T *tp, int id, int force)
{
    win_T	*wp;
    win_T	**root = &tp->tp_first_popupwin;
    win_T	*prev = NULL;

    for (wp = *root; wp != NULL; prev = wp, wp = wp->w_next)
	if (wp->w_id == id)
	{
	    if (wp == curwin)
	    {
		if (!force)
		{
		    error_for_popup_window();
		    return FAIL;
		}
		back_to_prevwin(wp);
	    }
	    if (prev == NULL)
		*root = wp->w_next;
	    else
		prev->w_next = wp->w_next;
	    popup_free(wp);
	    return OK;
	}
    return FAIL;
}

    void
close_all_popups(int force)
{
    if (!force && ERROR_IF_ANY_POPUP_WINDOW)
	return;
    while (first_popupwin != NULL)
	if (popup_close(first_popupwin->w_id, force) == FAIL)
	    return;
    while (curtab->tp_first_popupwin != NULL)
	if (popup_close(curtab->tp_first_popupwin->w_id, force) == FAIL)
	    return;
}

/*
 * popup_move({id}, {options})
 */
    void
f_popup_move(typval_T *argvars, typval_T *rettv UNUSED)
{
    dict_T	*dict;
    int		id;
    win_T	*wp;

    if (in_vim9script()
	    && (check_for_number_arg(argvars, 0) == FAIL
		|| check_for_dict_arg(argvars, 1) == FAIL))
	return;

    id = (int)tv_get_number(argvars);
    wp = find_popup_win(id);
    if (wp == NULL)
	return;  // invalid {id}

    if (check_for_nonnull_dict_arg(argvars, 1) == FAIL)
	return;
    dict = argvars[1].vval.v_dict;

    apply_move_options(wp, dict);

    if (wp->w_winrow + wp->w_height >= cmdline_row)
	clear_cmdline = TRUE;
    popup_adjust_position(wp);
}

/*
 * popup_setoptions({id}, {options})
 */
    void
f_popup_setoptions(typval_T *argvars, typval_T *rettv UNUSED)
{
    dict_T	*dict;
    int		id;
    win_T	*wp;
    linenr_T	old_firstline;

    if (in_vim9script()
	    && (check_for_number_arg(argvars, 0) == FAIL
		|| check_for_dict_arg(argvars, 1) == FAIL))
	return;

    id = (int)tv_get_number(argvars);
    wp = find_popup_win(id);
    if (wp == NULL)
	return;  // invalid {id}

    if (check_for_nonnull_dict_arg(argvars, 1) == FAIL)
	return;
    dict = argvars[1].vval.v_dict;
    old_firstline = wp->w_firstline;

    apply_options(wp, dict, FALSE);

    if (old_firstline != wp->w_firstline)
	redraw_win_later(wp, UPD_NOT_VALID);
    popup_adjust_position(wp);
}

/*
 * popup_getpos({id})
 */
    void
f_popup_getpos(typval_T *argvars, typval_T *rettv)
{
    dict_T	*dict;
    int		id;
    win_T	*wp;
    int		top_extra;
    int		left_extra;

    if (rettv_dict_alloc(rettv) == FAIL)
	return;

    if (in_vim9script() && check_for_number_arg(argvars, 0) == FAIL)
	return;

    id = (int)tv_get_number(argvars);
    wp = find_popup_win(id);
    if (wp == NULL)
	return;  // invalid {id}
    top_extra = popup_top_extra(wp);
    left_extra = wp->w_popup_border[3] + wp->w_popup_padding[3];

    // we know how much space we need, avoid resizing halfway
    dict = rettv->vval.v_dict;
    hash_lock_size(&dict->dv_hashtab, 11);

    dict_add_number(dict, "line", wp->w_winrow + 1);
    dict_add_number(dict, "col", wp->w_wincol + 1);
    dict_add_number(dict, "width", wp->w_width + left_extra
	    + wp->w_popup_border[1] + wp->w_popup_padding[1]);
    dict_add_number(dict, "height", wp->w_height + top_extra
	    + wp->w_popup_border[2] + wp->w_popup_padding[2]);

    dict_add_number(dict, "core_line", wp->w_winrow + 1 + top_extra);
    dict_add_number(dict, "core_col", wp->w_wincol + 1 + left_extra);
    dict_add_number(dict, "core_width", wp->w_width);
    dict_add_number(dict, "core_height", wp->w_height);

    dict_add_number(dict, "scrollbar", wp->w_has_scrollbar);
    dict_add_number(dict, "firstline", wp->w_topline);
    dict_add_number(dict, "lastline", wp->w_botline - 1);
    dict_add_number(dict, "visible",
	    win_valid(wp) && (wp->w_popup_flags & POPF_HIDDEN) == 0);

    hash_unlock(&dict->dv_hashtab);
}

/*
 * popup_list()
 */
    void
f_popup_list(typval_T *argvars UNUSED, typval_T *rettv)
{
    win_T	*wp;
    tabpage_T	*tp;

    if (rettv_list_alloc(rettv) == FAIL)
	return;
    FOR_ALL_POPUPWINS(wp)
	list_append_number(rettv->vval.v_list, wp->w_id);
    FOR_ALL_TABPAGES(tp)
	FOR_ALL_POPUPWINS_IN_TAB(tp, wp)
	    list_append_number(rettv->vval.v_list, wp->w_id);
}

/*
 * popup_locate({row}, {col})
 */
    void
f_popup_locate(typval_T *argvars, typval_T *rettv)
{
    int		row;
    int		col;
    win_T	*wp;

    if (in_vim9script()
	    && (check_for_number_arg(argvars, 0) == FAIL
		|| check_for_number_arg(argvars, 1) == FAIL))
	return;

    row = tv_get_number(&argvars[0]) - 1;
    col = tv_get_number(&argvars[1]) - 1;
    wp = mouse_find_win(&row, &col, FIND_POPUP);
    if (wp != NULL && WIN_IS_POPUP(wp))
	rettv->vval.v_number = wp->w_id;
}

/*
 * For popup_getoptions(): add a "border" or "padding" entry to "dict".
 */
    static void
get_padding_border(dict_T *dict, int *array, char *name)
{
    list_T  *list;
    int	    i;

    if (array[0] == 0 && array[1] == 0 && array[2] == 0 && array[3] == 0)
	return;

    list = list_alloc();
    if (list == NULL)
	return;

    dict_add_list(dict, name, list);
    if (array[0] != 1 || array[1] != 1 || array[2] != 1 || array[3] != 1)
	for (i = 0; i < 4; ++i)
	    list_append_number(list, array[i]);
}

/*
 * For popup_getoptions(): add a "borderhighlight" entry to "dict".
 */
    static void
get_borderhighlight(dict_T *dict, win_T *wp)
{
    list_T  *list;
    int	    i;

    for (i = 0; i < 4; ++i)
	if (wp->w_border_highlight[i] != NULL)
	    break;
    if (i == 4)
	return;

    list = list_alloc();
    if (list == NULL)
	return;

    dict_add_list(dict, "borderhighlight", list);
    for (i = 0; i < 4; ++i)
	list_append_string(list, wp->w_border_highlight[i], -1);
}

/*
 * For popup_getoptions(): add a "borderchars" entry to "dict".
 */
    static void
get_borderchars(dict_T *dict, win_T *wp)
{
    list_T  *list;
    int	    i;
    char_u  buf[NUMBUFLEN];
    int	    len;

    for (i = 0; i < 8; ++i)
	if (wp->w_border_char[i] != 0)
	    break;
    if (i == 8)
	return;

    list = list_alloc();
    if (list == NULL)
	return;

    dict_add_list(dict, "borderchars", list);
    for (i = 0; i < 8; ++i)
    {
	len = mb_char2bytes(wp->w_border_char[i], buf);
	list_append_string(list, buf, len);
    }
}

/*
 * For popup_getoptions(): add a "moved" and "mousemoved" entry to "dict".
 */
    static void
get_moved_list(dict_T *dict, win_T *wp)
{
    list_T  *list;

    list = list_alloc();
    if (list != NULL)
    {
	dict_add_list(dict, "moved", list);
	list_append_number(list, wp->w_popup_lnum);
	list_append_number(list, wp->w_popup_mincol);
	list_append_number(list, wp->w_popup_maxcol);
    }
    list = list_alloc();
    if (list == NULL)
	return;

    dict_add_list(dict, "mousemoved", list);
    list_append_number(list, wp->w_popup_mouse_row);
    list_append_number(list, wp->w_popup_mouse_mincol);
    list_append_number(list, wp->w_popup_mouse_maxcol);
}

/*
 * popup_getoptions({id})
 */
    void
f_popup_getoptions(typval_T *argvars, typval_T *rettv)
{
    dict_T	*dict;
    int		id;
    win_T	*wp;
    tabpage_T	*tp;
    int		i;

    if (rettv_dict_alloc(rettv) == FAIL)
	return;

    if (in_vim9script() && check_for_number_arg(argvars, 0) == FAIL)
	return;

    id = (int)tv_get_number(argvars);
    wp = find_popup_win(id);
    if (wp == NULL)
	return;

    dict = rettv->vval.v_dict;
    dict_add_number(dict, "line", wp->w_wantline);
    dict_add_number(dict, "col", wp->w_wantcol);
    dict_add_number(dict, "minwidth", wp->w_minwidth);
    dict_add_number(dict, "minheight", wp->w_minheight);
    dict_add_number(dict, "maxheight", wp->w_maxheight);
    dict_add_number(dict, "maxwidth", wp->w_maxwidth);
    dict_add_number(dict, "firstline", wp->w_firstline);
    dict_add_number(dict, "scrollbar", wp->w_want_scrollbar);
    dict_add_number(dict, "zindex", wp->w_zindex);
    dict_add_number(dict, "fixed", wp->w_popup_fixed);
    if (wp->w_popup_prop_type && win_valid_any_tab(wp->w_popup_prop_win))
    {
	proptype_T *pt = text_prop_type_by_id(
		wp->w_popup_prop_win->w_buffer,
		wp->w_popup_prop_type);

	if (pt != NULL)
	    dict_add_string(dict, "textprop", pt->pt_name);
	dict_add_number(dict, "textpropwin", wp->w_popup_prop_win->w_id);
	dict_add_number(dict, "textpropid", wp->w_popup_prop_id);
    }
    dict_add_string(dict, "title", wp->w_popup_title);
    dict_add_number(dict, "wrap", wp->w_p_wrap);
    dict_add_number(dict, "drag", (wp->w_popup_flags & POPF_DRAG) != 0);
    dict_add_number(dict, "dragall",
	    (wp->w_popup_flags & POPF_DRAGALL) != 0);
    dict_add_number(dict, "mapping",
	    (wp->w_popup_flags & POPF_MAPPING) != 0);
    dict_add_number(dict, "resize", (wp->w_popup_flags & POPF_RESIZE) != 0);
    dict_add_number(dict, "posinvert",
	    (wp->w_popup_flags & POPF_POSINVERT) != 0);
    dict_add_number(dict, "cursorline",
	    (wp->w_popup_flags & POPF_CURSORLINE) != 0);
    dict_add_string(dict, "highlight", wp->w_p_wcr);
    if (wp->w_scrollbar_highlight != NULL)
	dict_add_string(dict, "scrollbarhighlight",
		wp->w_scrollbar_highlight);
    if (wp->w_thumb_highlight != NULL)
	dict_add_string(dict, "thumbhighlight", wp->w_thumb_highlight);

    // find the tabpage that holds this popup
    i = 1;
    FOR_ALL_TABPAGES(tp)
    {
	win_T *twp;

	FOR_ALL_POPUPWINS_IN_TAB(tp, twp)
	    if (twp->w_id == id)
		break;
	if (twp != NULL)
	    break;
	++i;
    }
    if (tp == NULL)
	i = -1;  // must be global
    else if (tp == curtab)
	i = 0;
    dict_add_number(dict, "tabpage", i);

    get_padding_border(dict, wp->w_popup_padding, "padding");
    get_padding_border(dict, wp->w_popup_border, "border");
    get_borderhighlight(dict, wp);
    get_borderchars(dict, wp);
    get_moved_list(dict, wp);

    if (wp->w_filter_cb.cb_name != NULL)
	dict_add_callback(dict, "filter", &wp->w_filter_cb);
    if (wp->w_close_cb.cb_name != NULL)
	dict_add_callback(dict, "callback", &wp->w_close_cb);

    for (i = 0; i < (int)ARRAY_LENGTH(poppos_entries); ++i)
	if (wp->w_popup_pos == poppos_entries[i].pp_val)
	{
	    dict_add_string(dict, "pos",
		    (char_u *)poppos_entries[i].pp_name);
	    break;
	}

    dict_add_string(dict, "close", (char_u *)(
		wp->w_popup_close == POPCLOSE_BUTTON ? "button"
		: wp->w_popup_close == POPCLOSE_CLICK ? "click" : "none"));

# if defined(FEAT_TIMERS)
    dict_add_number(dict, "time", wp->w_popup_timer != NULL
	    ?  (long)wp->w_popup_timer->tr_interval : 0L);
# endif
}

# if defined(FEAT_TERMINAL) || defined(PROTO)
/*
 * Return TRUE if the current window is running a terminal in a popup window.
 * Return FALSE when the job has ended.
 */
    int
error_if_term_popup_window()
{
    if (WIN_IS_POPUP(curwin) && curbuf->b_term != NULL
					   && term_job_running(curbuf->b_term))
    {
	emsg(_(e_not_allowed_for_terminal_in_popup_window));
	return TRUE;
    }
    return FALSE;
}
# endif

/*
 * Reset all the "handled_flag" flags in global popup windows and popup windows
 * in the current tab page.
 * Each calling function should use a different flag, see the list at
 * POPUP_HANDLED_1.  This won't work with recursive calls though.
 */
    void
popup_reset_handled(int handled_flag)
{
    win_T *wp;

    FOR_ALL_POPUPWINS(wp)
	wp->w_popup_handled &= ~handled_flag;
    FOR_ALL_POPUPWINS_IN_TAB(curtab, wp)
	wp->w_popup_handled &= ~handled_flag;
}

/*
 * Find the next visible popup where "handled_flag" is not set.
 * Must have called popup_reset_handled() first.
 * When "lowest" is TRUE find the popup with the lowest zindex, otherwise the
 * popup with the highest zindex.
 */
    win_T *
find_next_popup(int lowest, int handled_flag)
{
    win_T   *wp;
    win_T   *found_wp;
    int	    found_zindex;

    found_zindex = lowest ? INT_MAX : 0;
    found_wp = NULL;
    FOR_ALL_POPUPWINS(wp)
	if ((wp->w_popup_handled & handled_flag) == 0
		&& (wp->w_popup_flags & POPF_HIDDEN) == 0
		&& (lowest ? wp->w_zindex < found_zindex
		    : wp->w_zindex > found_zindex))
	{
	    found_zindex = wp->w_zindex;
	    found_wp = wp;
	}
    FOR_ALL_POPUPWINS_IN_TAB(curtab, wp)
	if ((wp->w_popup_handled & handled_flag) == 0
		&& (wp->w_popup_flags & POPF_HIDDEN) == 0
		&& (lowest ? wp->w_zindex < found_zindex
		    : wp->w_zindex > found_zindex))
	{
	    found_zindex = wp->w_zindex;
	    found_wp = wp;
	}

    if (found_wp != NULL)
	found_wp->w_popup_handled |= handled_flag;
    return found_wp;
}

/*
 * Invoke the filter callback for window "wp" with typed character "c".
 * Uses the global "mod_mask" for modifiers.
 * Returns the return value of the filter or -1 for CTRL-C in the current
 * window.
 * Careful: The filter may make "wp" invalid!
 */
    static int
invoke_popup_filter(win_T *wp, int c)
{
    int		res;
    typval_T	rettv;
    typval_T	argv[3];
    char_u	buf[NUMBUFLEN];
    linenr_T	old_lnum = wp->w_cursor.lnum;
    int		prev_did_emsg = did_emsg;

    // Emergency exit: CTRL-C closes the popup.
    if (c == Ctrl_C)
    {
	int save_got_int = got_int;
	int was_curwin = wp == curwin;

	// Reset got_int to avoid the callback isn't called.
	got_int = FALSE;
	popup_close_with_retval(wp, -1);
	got_int |= save_got_int;

	// If the popup is the current window it probably fails to close.  Then
	// do not consume the key.
	if (was_curwin && wp == curwin)
	    return -1;
	return TRUE;
    }

    argv[0].v_type = VAR_NUMBER;
    argv[0].vval.v_number = (varnumber_T)wp->w_id;

    // Convert the number to a string, so that the function can use:
    //	    if a:c == "\<F2>"
    buf[special_to_buf(c, mod_mask, FALSE, buf)] = NUL;
    argv[1].v_type = VAR_STRING;
    argv[1].vval.v_string = vim_strsave(buf);

    argv[2].v_type = VAR_UNKNOWN;

    // NOTE: The callback might close the popup and make "wp" invalid.
    if (call_callback(&wp->w_filter_cb, -1, &rettv, 2, argv) == FAIL)
    {
	// Cannot call the function, close the popup to avoid that the filter
	// eats keys and the user is stuck.  Might as well eat the key.
	popup_close_with_retval(wp, -1);
	res = TRUE;
    }
    else
    {
	if (win_valid_popup(wp) && old_lnum != wp->w_cursor.lnum)
	    popup_highlight_curline(wp);

	// If an error message was given always return FALSE, so that keys are
	// not consumed and the user can type something.
	// If we get three errors in a row then close the popup.  Decrement the
	// error count by 1/10 if there are no errors, thus allowing up to 1 in
	// 10 calls to cause an error.
	if (win_valid_popup(wp) && did_emsg > prev_did_emsg)
	{
	    wp->w_filter_errors += 10;
	    if (wp->w_filter_errors >= 30)
		popup_close_with_retval(wp, -1);
	    res = FALSE;
	}
	else
	{
	    if (win_valid_popup(wp) && wp->w_filter_errors > 0)
		--wp->w_filter_errors;
	    res = tv_get_bool(&rettv);
	}
    }

    vim_free(argv[1].vval.v_string);
    clear_tv(&rettv);
    return res;
}

/*
 * Called when "c" was typed: invoke popup filter callbacks.
 * Returns TRUE when the character was consumed,
 */
    int
popup_do_filter(int c)
{
    static int	recursive = FALSE;
    int		res = FALSE;
    win_T	*wp;
    int		save_KeyTyped = KeyTyped;
    int		state;
    int		was_must_redraw = must_redraw;

#ifdef FEAT_TERMINAL
    // Popup window with terminal always gets focus.
    if (popup_is_popup(curwin) && curbuf->b_term != NULL)
	return FALSE;
#endif

    if (recursive)
	return FALSE;
    recursive = TRUE;

    if (c == K_LEFTMOUSE)
    {
	int row = mouse_row;
	int col = mouse_col;

	wp = mouse_find_win(&row, &col, FIND_POPUP);
	if (wp != NULL && popup_close_if_on_X(wp, row, col))
	    res = TRUE;
    }

    popup_reset_handled(POPUP_HANDLED_2);
    state = get_real_state();
    while (res == FALSE
		     && (wp = find_next_popup(FALSE, POPUP_HANDLED_2)) != NULL)
	if (wp->w_filter_cb.cb_name != NULL
		&& (wp->w_filter_mode & state) != 0)
	    res = invoke_popup_filter(wp, c);

    if (must_redraw > was_must_redraw)
    {
	int save_got_int = got_int;

	// Reset got_int to avoid a function used in the statusline aborts.
	got_int = FALSE;
	redraw_after_callback(FALSE, FALSE);
	got_int |= save_got_int;
    }
    recursive = FALSE;
    KeyTyped = save_KeyTyped;

    // When interrupted return FALSE to avoid looping.
    return res == -1 ? FALSE : res;
}

/*
 * Return TRUE if there is a popup visible with a filter callback and the
 * "mapping" property off.
 */
    int
popup_no_mapping(void)
{
    int	    round;
    win_T   *wp;

    for (round = 1; round <= 2; ++round)
	for (wp = round == 1 ? first_popupwin : curtab->tp_first_popupwin;
						   wp != NULL; wp = wp->w_next)
	    if (wp->w_filter_cb.cb_name != NULL
		    && (wp->w_popup_flags & (POPF_HIDDEN | POPF_MAPPING)) == 0)
		return TRUE;
    return FALSE;
}

/*
 * Called when the cursor moved: check if any popup needs to be closed if the
 * cursor moved far enough.
 */
    void
popup_check_cursor_pos()
{
    win_T *wp;

    popup_reset_handled(POPUP_HANDLED_3);
    while ((wp = find_next_popup(TRUE, POPUP_HANDLED_3)) != NULL)
	if (wp->w_popup_curwin != NULL
		&& (curwin != wp->w_popup_curwin
		    || curwin->w_cursor.lnum != wp->w_popup_lnum
		    || curwin->w_cursor.col < wp->w_popup_mincol
		    || curwin->w_cursor.col > wp->w_popup_maxcol))
	    popup_close_with_retval(wp, -1);
}

/*
 * Update "w_popup_mask_cells".
 */
    static void
popup_update_mask(win_T *wp, int width, int height)
{
    listitem_T	*lio, *li;
    char_u	*cells;
    int		row, col;

    if (wp->w_popup_mask == NULL || width == 0 || height == 0)
    {
	vim_free(wp->w_popup_mask_cells);
	wp->w_popup_mask_cells = NULL;
	return;
    }
    if (wp->w_popup_mask_cells != NULL
	    && wp->w_popup_mask_height == height
	    && wp->w_popup_mask_width == width)
	return;  // cache is still valid

    vim_free(wp->w_popup_mask_cells);
    wp->w_popup_mask_cells = alloc_clear((size_t)width * height);
    if (wp->w_popup_mask_cells == NULL)
	return;
    cells = wp->w_popup_mask_cells;

    FOR_ALL_LIST_ITEMS(wp->w_popup_mask, lio)
    {
	int cols, cole;
	int lines, linee;

	li = lio->li_tv.vval.v_list->lv_first;
	cols = tv_get_number(&li->li_tv);
	if (cols < 0)
	    cols = width + cols + 1;
	if (cols <= 0)
	    cols = 1;
	li = li->li_next;
	cole = tv_get_number(&li->li_tv);
	if (cole < 0)
	    cole = width + cole + 1;
	if (cole > width)
	    cole = width;
	li = li->li_next;
	lines = tv_get_number(&li->li_tv);
	if (lines < 0)
	    lines = height + lines + 1;
	if (lines <= 0)
	    lines = 1;
	li = li->li_next;
	linee = tv_get_number(&li->li_tv);
	if (linee < 0)
	    linee = height + linee + 1;
	if (linee > height)
	    linee = height;

	for (row = lines - 1; row < linee; ++row)
	    for (col = cols - 1; col < cole; ++col)
		cells[row * width + col] = 1;
    }
}

/*
 * Return TRUE if "col" / "line" matches with an entry in w_popup_mask.
 * "col" and "line" are screen coordinates.
 */
    static int
popup_masked(win_T *wp, int width, int height, int screencol, int screenline)
{
    int col = screencol - wp->w_wincol + wp->w_popup_leftoff;
    int line = screenline - wp->w_winrow;

    return col >= 0 && col < width
	    && line >= 0 && line < height
	    && wp->w_popup_mask_cells[line * width + col];
}

/*
 * Set flags in popup_transparent[] for window "wp" to "val".
 */
    static void
update_popup_transparent(win_T *wp, int val)
{
    if (wp->w_popup_mask == NULL)
	return;

    int		width = popup_width(wp);
    int		height = popup_height(wp);
    listitem_T	*lio, *li;
    int		cols, cole;
    int		lines, linee;
    int		col, line;

    FOR_ALL_LIST_ITEMS(wp->w_popup_mask, lio)
    {
	li = lio->li_tv.vval.v_list->lv_first;
	cols = tv_get_number(&li->li_tv);
	if (cols < 0)
	    cols = width + cols + 1;
	li = li->li_next;
	cole = tv_get_number(&li->li_tv);
	if (cole < 0)
	    cole = width + cole + 1;
	li = li->li_next;
	lines = tv_get_number(&li->li_tv);
	if (lines < 0)
	    lines = height + lines + 1;
	li = li->li_next;
	linee = tv_get_number(&li->li_tv);
	if (linee < 0)
	    linee = height + linee + 1;

	--cols;
	cols -= wp->w_popup_leftoff;
	if (cols < 0)
	    cols = 0;
	cole -= wp->w_popup_leftoff;
	--lines;
	if (lines < 0)
	    lines = 0;
	for (line = lines; line < linee
		&& line + wp->w_winrow < screen_Rows; ++line)
	    for (col = cols; col < cole
		    && col + wp->w_wincol < screen_Columns; ++col)
		popup_transparent[(line + wp->w_winrow) * screen_Columns
		    + col + wp->w_wincol] = val;
    }
}

/*
 * Only called when popup window "wp" is hidden: If the window is positioned
 * next to a text property, and it is now visible, then  unhide the popup.
 * We don't check if visible popups become hidden, that is done in
 * popup_adjust_position().
 * Return TRUE if the popup became unhidden.
 */
    static int
check_popup_unhidden(win_T *wp)
{
    if (wp->w_popup_prop_type > 0 && win_valid(wp->w_popup_prop_win))
    {
	textprop_T  prop;
	linenr_T    lnum;

	if ((wp->w_popup_flags & POPF_HIDDEN_FORCE) == 0
		&& find_visible_prop(wp->w_popup_prop_win,
				    wp->w_popup_prop_type, wp->w_popup_prop_id,
							   &prop, &lnum) == OK)
	{
	    wp->w_popup_flags &= ~POPF_HIDDEN;
	    wp->w_popup_prop_topline = 0; // force repositioning
	    return TRUE;
	}
    }
    return FALSE;
}

/*
 * Return TRUE if popup_adjust_position() needs to be called for "wp".
 * That is when the buffer in the popup was changed, or the popup is following
 * a textprop and the referenced buffer was changed.
 * Or when the cursor line changed and "cursorline" is set.
 */
    static int
popup_need_position_adjust(win_T *wp)
{
    if (wp->w_popup_last_changedtick != CHANGEDTICK(wp->w_buffer))
	return TRUE;
    if (win_valid(wp->w_popup_prop_win)
	    && (wp->w_popup_prop_changedtick
				 != CHANGEDTICK(wp->w_popup_prop_win->w_buffer)
	       || wp->w_popup_prop_topline != wp->w_popup_prop_win->w_topline))
	return TRUE;

    // May need to adjust the width if the cursor moved.
    return wp->w_cursor.lnum != wp->w_popup_last_curline;
}

/*
 * Update "popup_mask" if needed.
 * Also recomputes the popup size and positions.
 * Also updates "popup_visible" and "popup_uses_mouse_move".
 * Also marks window lines for redrawing.
 */
    void
may_update_popup_mask(int type)
{
    win_T	*wp;
    short	*mask;
    int		line, col;
    int		redraw_all_popups = FALSE;
    int		redrawing_all_win;

    // Need to recompute when switching tabs.
    // Also recompute when the type is UPD_CLEAR or UPD_NOT_VALID, something
    // basic (such as the screen size) must have changed.
    if (popup_mask_tab != curtab || type >= UPD_NOT_VALID)
    {
	popup_mask_refresh = TRUE;
	redraw_all_popups = TRUE;
    }

    // Check if any popup window buffer has changed and if any popup connected
    // to a text property has become visible.
    FOR_ALL_POPUPWINS(wp)
	if (wp->w_popup_flags & POPF_HIDDEN)
	    popup_mask_refresh |= check_popup_unhidden(wp);
	else if (popup_need_position_adjust(wp))
	    popup_mask_refresh = TRUE;
    FOR_ALL_POPUPWINS_IN_TAB(curtab, wp)
	if (wp->w_popup_flags & POPF_HIDDEN)
	    popup_mask_refresh |= check_popup_unhidden(wp);
	else if (popup_need_position_adjust(wp))
	    popup_mask_refresh = TRUE;

    if (!popup_mask_refresh)
	return;

    // Need to update the mask, something has changed.
    popup_mask_refresh = FALSE;
    popup_mask_tab = curtab;
    popup_visible = FALSE;

    // If redrawing all windows, just update "popup_mask".
    // If redrawing only what is needed, update "popup_mask_next" and then
    // compare with "popup_mask" to see what changed.
    redrawing_all_win = TRUE;
    FOR_ALL_WINDOWS(wp)
	if (wp->w_redr_type < UPD_SOME_VALID)
	    redrawing_all_win = FALSE;
    if (redrawing_all_win)
	mask = popup_mask;
    else
	mask = popup_mask_next;
    vim_memset(mask, 0, (size_t)screen_Rows * screen_Columns * sizeof(short));

    // Find the window with the lowest zindex that hasn't been handled yet,
    // so that the window with a higher zindex overwrites the value in
    // popup_mask.
    popup_reset_handled(POPUP_HANDLED_4);
    while ((wp = find_next_popup(TRUE, POPUP_HANDLED_4)) != NULL)
    {
	int width;
	int height;

	popup_visible = TRUE;

	// Recompute the position if the text changed.  It may make the popup
	// hidden if it's attach to a text property that is no longer visible.
	if (redraw_all_popups || popup_need_position_adjust(wp))
	{
	    popup_adjust_position(wp);
	    if (wp->w_popup_flags & POPF_HIDDEN)
		continue;
	}

	width = popup_width(wp);
	height = popup_height(wp);
	popup_update_mask(wp, width, height);
	for (line = wp->w_winrow;
		line < wp->w_winrow + height && line < screen_Rows; ++line)
	    for (col = wp->w_wincol;
		 col < wp->w_wincol + width - wp->w_popup_leftoff
						&& col < screen_Columns; ++col)
		if (wp->w_zindex < POPUPMENU_ZINDEX
			&& pum_visible()
			&& pum_under_menu(line, col, FALSE))
		    mask[line * screen_Columns + col] = POPUPMENU_ZINDEX;
		else if (wp->w_popup_mask_cells == NULL
				|| !popup_masked(wp, width, height, col, line))
		    mask[line * screen_Columns + col] = wp->w_zindex;
    }

    // Only check which lines are to be updated if not already
    // updating all lines.
    if (mask == popup_mask_next)
    {
	int	    *plines_cache = ALLOC_CLEAR_MULT(int, Rows);
	win_T	    *prev_wp = NULL;

	for (line = 0; line < screen_Rows; ++line)
	{
	    int	    col_done = 0;

	    for (col = 0; col < screen_Columns; ++col)
	    {
		int off = line * screen_Columns + col;

		if (popup_mask[off] != popup_mask_next[off])
		{
		    popup_mask[off] = popup_mask_next[off];

		    if (line >= cmdline_row)
		    {
			// the command line needs to be cleared if text below
			// the popup is now visible.
			if (!msg_scrolled && popup_mask_next[off] == 0)
			    clear_cmdline = TRUE;
		    }
		    else if (col >= col_done)
		    {
			linenr_T	lnum;
			int		line_cp = line;
			int		col_cp = col;

			// The screen position "line" / "col" needs to be
			// redrawn.  Figure out what window that is and update
			// w_redraw_top and w_redr_bot.  Only needs to be done
			// once for each window line.
			wp = mouse_find_win(&line_cp, &col_cp, IGNORE_POPUP);
			if (wp != NULL)
			{
#if defined(FEAT_TERMINAL)
			    // A terminal window needs to be redrawn.
			    if (bt_terminal(wp->w_buffer))
				redraw_win_later(wp, UPD_NOT_VALID);
			    else
#endif
			    {
				if (wp != prev_wp)
				{
				    vim_memset(plines_cache, 0,
							   sizeof(int) * Rows);
				    prev_wp = wp;
				}

				if (line_cp >= wp->w_height)
				    // In (or below) status line
				    wp->w_redr_status = TRUE;
				else
				{
				    // compute the position in the buffer line
				    // from the position in the window
				    (void)mouse_comp_pos(wp, &line_cp, &col_cp,
							  &lnum, plines_cache);
				    redrawWinline(wp, lnum);
				}
			    }

			    // This line is going to be redrawn, no need to
			    // check until the right side of the window.
			    col_done = wp->w_wincol + wp->w_width - 1;
			}
		    }
		}
	    }
	}

	vim_free(plines_cache);
    }

    update_popup_uses_mouse_move();
}

/*
 * If the current window is a popup and something relevant changed, recompute
 * the position and size.
 */
    void
may_update_popup_position(void)
{
    if (popup_is_popup(curwin) && popup_need_position_adjust(curwin))
	popup_adjust_position(curwin);
}

/*
 * Return a string of "len" spaces in IObuff.
 */
    static char_u *
get_spaces(int len)
{
    vim_memset(IObuff, ' ', (size_t)len);
    IObuff[len] = NUL;
    return IObuff;
}

/*
 * Update popup windows.  They are drawn on top of normal windows.
 * "win_update" is called for each popup window, lowest zindex first.
 */
    void
update_popups(void (*win_update)(win_T *wp))
{
    win_T   *wp;
    int	    top_off;
    int	    left_extra;
    int	    total_width;
    int	    total_height;
    int	    top_padding;
    int	    popup_attr;
    int	    border_attr[4];
    int	    border_char[8];
    char_u  buf[MB_MAXBYTES];
    int	    row;
    int	    wincol;
    int	    padcol = 0;
    int	    padendcol = 0;
    int	    i;
    int	    sb_thumb_top = 0;
    int	    sb_thumb_height = 0;
    int	    attr_scroll = 0;
    int	    attr_thumb = 0;

    // hide the cursor until redrawing is done.
    cursor_off();

    // Find the window with the lowest zindex that hasn't been updated yet,
    // so that the window with a higher zindex is drawn later, thus goes on
    // top.
    popup_reset_handled(POPUP_HANDLED_5);
    while ((wp = find_next_popup(TRUE, POPUP_HANDLED_5)) != NULL)
    {
	int	    title_len = 0;
	int	    title_wincol;

	// This drawing uses the zindex of the popup window, so that it's on
	// top of the text but doesn't draw when another popup with higher
	// zindex is on top of the character.
	screen_zindex = wp->w_zindex;

	// Set flags in popup_transparent[] for masked cells.
	update_popup_transparent(wp, 1);

	// adjust w_winrow and w_wincol for border and padding, since
	// win_update() doesn't handle them.
	top_off = popup_top_extra(wp);
	left_extra = wp->w_popup_padding[3] + wp->w_popup_border[3]
							 - wp->w_popup_leftoff;
	if (wp->w_wincol + left_extra < 0)
	    left_extra = -wp->w_wincol;
	wp->w_winrow += top_off;
	wp->w_wincol += left_extra;

	// Draw the popup text, unless it's off screen.
	if (wp->w_winrow < screen_Rows && wp->w_wincol < screen_Columns)
	{
	    // May need to update the "cursorline" highlighting, which may also
	    // change "topline"
	    if (wp->w_popup_last_curline != wp->w_cursor.lnum)
		popup_highlight_curline(wp);

	    win_update(wp);

	    // move the cursor into the visible lines, otherwise executing
	    // commands with win_execute() may cause the text to jump.
	    if (wp->w_cursor.lnum < wp->w_topline)
		wp->w_cursor.lnum = wp->w_topline;
	    else if (wp->w_cursor.lnum >= wp->w_botline)
		wp->w_cursor.lnum = wp->w_botline - 1;
	}

	wp->w_winrow -= top_off;
	wp->w_wincol -= left_extra;

	// Add offset for border and padding if not done already.
	if ((wp->w_flags & WFLAG_WCOL_OFF_ADDED) == 0)
	{
	    wp->w_wcol += left_extra;
	    wp->w_flags |= WFLAG_WCOL_OFF_ADDED;
	}
	if ((wp->w_flags & WFLAG_WROW_OFF_ADDED) == 0)
	{
	    wp->w_wrow += top_off;
	    wp->w_flags |= WFLAG_WROW_OFF_ADDED;
	}

	total_width = popup_width(wp) - wp->w_popup_rightoff;
	total_height = popup_height(wp);
	popup_attr = get_wcr_attr(wp);

	if (wp->w_winrow + total_height > cmdline_row)
	    wp->w_popup_flags |= POPF_ON_CMDLINE;
	else
	    wp->w_popup_flags &= ~POPF_ON_CMDLINE;


	// We can only use these line drawing characters when 'encoding' is
	// "utf-8" and 'ambiwidth' is "single".
	if (enc_utf8 && *p_ambw == 's')
	{
	    border_char[0] = border_char[2] = 0x2550;
	    border_char[1] = border_char[3] = 0x2551;
	    border_char[4] = 0x2554;
	    border_char[5] = 0x2557;
	    border_char[6] = (wp->w_popup_flags & POPF_RESIZE)
							     ? 0x21f2 : 0x255d;
	    border_char[7] = 0x255a;
	}
	else
	{
	    border_char[0] = border_char[2] = '-';
	    border_char[1] = border_char[3] = '|';
	    for (i = 4; i < 8; ++i)
		border_char[i] = '+';
	    if (wp->w_popup_flags & POPF_RESIZE)
		border_char[6] = '@';
	}
	for (i = 0; i < 8; ++i)
	    if (wp->w_border_char[i] != 0)
		border_char[i] = wp->w_border_char[i];

	for (i = 0; i < 4; ++i)
	{
	    border_attr[i] = popup_attr;
	    if (wp->w_border_highlight[i] != NULL)
		border_attr[i] = syn_name2attr(wp->w_border_highlight[i]);
	}

	// Title goes on top of border or padding.
	title_wincol = wp->w_wincol + 1;
	if (wp->w_popup_title != NULL)
	{
	    title_len = vim_strsize(wp->w_popup_title);

	    // truncate the title if too long
	    if (title_len > total_width - 2)
	    {
		int	title_byte_len = (int)STRLEN(wp->w_popup_title);
		char_u  *title_text = alloc(title_byte_len + 1);

		if (title_text != NULL)
		{
		    trunc_string(wp->w_popup_title, title_text,
					  total_width - 2, title_byte_len + 1);
		    screen_puts(title_text, wp->w_winrow, title_wincol,
				  wp->w_popup_border[0] > 0
						? border_attr[0] : popup_attr);
		    vim_free(title_text);
		}

		title_len = total_width - 2;
	    }
	    else
		screen_puts(wp->w_popup_title, wp->w_winrow, title_wincol,
		      wp->w_popup_border[0] > 0 ? border_attr[0] : popup_attr);
	}

	wincol = wp->w_wincol - wp->w_popup_leftoff;
	top_padding = wp->w_popup_padding[0];
	if (wp->w_popup_border[0] > 0)
	{
	    // top border; do not draw over the title
	    if (title_len > 0)
	    {
		screen_fill(wp->w_winrow, wp->w_winrow + 1,
			wincol < 0 ? 0 : wincol, title_wincol,
			wp->w_popup_border[3] != 0 && wp->w_popup_leftoff == 0
					     ? border_char[4] : border_char[0],
			border_char[0], border_attr[0]);
		screen_fill(wp->w_winrow, wp->w_winrow + 1,
			title_wincol + title_len, wincol + total_width,
			border_char[0], border_char[0], border_attr[0]);
	    }
	    else
	    {
		screen_fill(wp->w_winrow, wp->w_winrow + 1,
			wincol < 0 ? 0 : wincol, wincol + total_width,
			wp->w_popup_border[3] != 0 && wp->w_popup_leftoff == 0
					     ? border_char[4] : border_char[0],
			border_char[0], border_attr[0]);
	    }
	    if (wp->w_popup_border[1] > 0)
	    {
		buf[mb_char2bytes(border_char[5], buf)] = NUL;
		screen_puts(buf, wp->w_winrow,
			       wincol + total_width - 1, border_attr[1]);
	    }
	}
	else if (wp->w_popup_padding[0] == 0 && popup_top_extra(wp) > 0)
	    top_padding = 1;

	if (top_padding > 0 || wp->w_popup_padding[2] > 0)
	{
	    padcol = wincol + wp->w_popup_border[3];
	    padendcol = wp->w_wincol + total_width - wp->w_popup_border[1]
							 - wp->w_has_scrollbar;
	    if (padcol < 0)
	    {
		padendcol += padcol;
		padcol = 0;
	    }
	}
	if (top_padding > 0)
	{
	    row = wp->w_winrow + wp->w_popup_border[0];
	    if (title_len > 0 && row == wp->w_winrow)
	    {
		// top padding and no border; do not draw over the title
		screen_fill(row, row + 1, padcol, title_wincol,
							 ' ', ' ', popup_attr);
		screen_fill(row, row + 1, title_wincol + title_len,
					      padendcol, ' ', ' ', popup_attr);
		row += 1;
		top_padding -= 1;
	    }
	    screen_fill(row, row + top_padding, padcol, padendcol,
							 ' ', ' ', popup_attr);
	}

	// Compute scrollbar thumb position and size.
	if (wp->w_has_scrollbar)
	{
	    linenr_T	linecount = wp->w_buffer->b_ml.ml_line_count;
	    int		height = wp->w_height;
	    int		last;

	    sb_thumb_height = ((linenr_T)height * height + linecount / 2)
								   / linecount;
	    if (wp->w_topline > 1 && sb_thumb_height == height)
		--sb_thumb_height;  // scrolled, no full thumb
	    if (sb_thumb_height == 0)
		sb_thumb_height = 1;
	    if (linecount <= wp->w_height || wp->w_height == 0)
		// it just fits, avoid divide by zero
		sb_thumb_top = 0;
	    else
		sb_thumb_top = (wp->w_topline - 1
				+ (linecount / wp->w_height) / 2)
				* (wp->w_height - sb_thumb_height)
						  / (linecount - wp->w_height);
	    if (wp->w_topline > 1 && sb_thumb_top == 0 && height > 1)
		sb_thumb_top = 1;  // show it's scrolled
	    last = total_height - top_off - wp->w_popup_border[2];
	    if (sb_thumb_top >= last)
		// show at least one character
		sb_thumb_top = last - 1;

	    if (wp->w_scrollbar_highlight != NULL)
		attr_scroll = syn_name2attr(wp->w_scrollbar_highlight);
	    else
		attr_scroll = highlight_attr[HLF_PSB];
	    if (wp->w_thumb_highlight != NULL)
		attr_thumb = syn_name2attr(wp->w_thumb_highlight);
	    else
		attr_thumb = highlight_attr[HLF_PST];
	}

	for (i = wp->w_popup_border[0];
				 i < total_height - wp->w_popup_border[2]; ++i)
	{
	    int	pad_left;
	    // left and right padding only needed next to the body
	    int do_padding =
		    i >= wp->w_popup_border[0] + wp->w_popup_padding[0]
		    && i < total_height - wp->w_popup_border[2]
						 - wp->w_popup_padding[2];

	    row = wp->w_winrow + i;

	    // left border
	    if (wp->w_popup_border[3] > 0 && wincol >= 0)
	    {
		buf[mb_char2bytes(border_char[3], buf)] = NUL;
		screen_puts(buf, row, wincol, border_attr[3]);
	    }
	    if (do_padding && wp->w_popup_padding[3] > 0)
	    {
		int col = wincol + wp->w_popup_border[3];

		// left padding
		pad_left = wp->w_popup_padding[3];
		if (col < 0)
		{
		    pad_left += col;
		    col = 0;
		}
		if (pad_left > 0)
		    screen_puts(get_spaces(pad_left), row, col, popup_attr);
	    }
	    // scrollbar
	    if (wp->w_has_scrollbar)
	    {
		int line = i - top_off;
		int scroll_col = wp->w_wincol + total_width - 1
						       - wp->w_popup_border[1];

		if (line >= 0 && line < wp->w_height)
		    screen_putchar(' ', row, scroll_col,
			    line >= sb_thumb_top
				       && line < sb_thumb_top + sb_thumb_height
						  ? attr_thumb : attr_scroll);
		else
		    screen_putchar(' ', row, scroll_col, popup_attr);
	    }
	    // right border
	    if (wp->w_popup_border[1] > 0)
	    {
		buf[mb_char2bytes(border_char[1], buf)] = NUL;
		screen_puts(buf, row, wincol + total_width - 1, border_attr[1]);
	    }
	    // right padding
	    if (do_padding && wp->w_popup_padding[1] > 0)
		screen_puts(get_spaces(wp->w_popup_padding[1]), row,
			wincol + wp->w_popup_border[3]
			+ wp->w_popup_padding[3] + wp->w_width + wp->w_leftcol,
			popup_attr);
	}

	if (wp->w_popup_padding[2] > 0)
	{
	    // bottom padding
	    row = wp->w_winrow + wp->w_popup_border[0]
				       + wp->w_popup_padding[0] + wp->w_height;
	    screen_fill(row, row + wp->w_popup_padding[2],
				       padcol, padendcol, ' ', ' ', popup_attr);
	}

	if (wp->w_popup_border[2] > 0)
	{
	    // bottom border
	    row = wp->w_winrow + total_height - 1;
	    screen_fill(row , row + 1,
		    wincol < 0 ? 0 : wincol,
		    wincol + total_width,
		    wp->w_popup_border[3] != 0 && wp->w_popup_leftoff == 0
					     ? border_char[7] : border_char[2],
		    border_char[2], border_attr[2]);
	    if (wp->w_popup_border[1] > 0)
	    {
		buf[mb_char2bytes(border_char[6], buf)] = NUL;
		screen_puts(buf, row, wincol + total_width - 1, border_attr[2]);
	    }
	}

	if (wp->w_popup_close == POPCLOSE_BUTTON)
	{
	    // close button goes on top of anything at the top-right corner
	    buf[mb_char2bytes('X', buf)] = NUL;
	    screen_puts(buf, wp->w_winrow, wincol + total_width - 1,
		      wp->w_popup_border[0] > 0 ? border_attr[0] : popup_attr);
	}

	update_popup_transparent(wp, 0);

	// Back to the normal zindex.
	screen_zindex = 0;

#ifdef HAS_MESSAGE_WINDOW
	// if this was the message window popup may start the timer now
	may_start_message_win_timer(wp);
#endif
    }

#if defined(FEAT_SEARCH_EXTRA)
    // In case win_update() called start_search_hl().
    end_search_hl();
#endif
}

/*
 * Mark references in callbacks of one popup window.
 */
    static int
set_ref_in_one_popup(win_T *wp, int copyID)
{
    int		abort = FALSE;
    typval_T	tv;

    if (wp->w_close_cb.cb_partial != NULL)
    {
	tv.v_type = VAR_PARTIAL;
	tv.vval.v_partial = wp->w_close_cb.cb_partial;
	abort = abort || set_ref_in_item(&tv, copyID, NULL, NULL);
    }
    if (wp->w_filter_cb.cb_partial != NULL)
    {
	tv.v_type = VAR_PARTIAL;
	tv.vval.v_partial = wp->w_filter_cb.cb_partial;
	abort = abort || set_ref_in_item(&tv, copyID, NULL, NULL);
    }
    abort = abort || set_ref_in_list(wp->w_popup_mask, copyID);
    return abort;
}

/*
 * Set reference in callbacks of popup windows.
 */
    int
set_ref_in_popups(int copyID)
{
    int		abort = FALSE;
    win_T	*wp;
    tabpage_T	*tp;

    for (wp = first_popupwin; !abort && wp != NULL; wp = wp->w_next)
	abort = abort || set_ref_in_one_popup(wp, copyID);

    FOR_ALL_TABPAGES(tp)
    {
	for (wp = tp->tp_first_popupwin; !abort && wp != NULL; wp = wp->w_next)
	    abort = abort || set_ref_in_one_popup(wp, copyID);
	if (abort)
	    break;
    }
    return abort;
}

    int
popup_is_popup(win_T *wp)
{
    return wp->w_popup_flags != 0;
}

#if defined(FEAT_QUICKFIX) || defined(PROTO)
/*
 * Find an existing popup used as the preview window, in the current tab page.
 * Return NULL if not found.
 */
    win_T *
popup_find_preview_window(void)
{
    win_T *wp;

    // Preview window popup is always local to tab page.
    FOR_ALL_POPUPWINS_IN_TAB(curtab, wp)
	if (wp->w_p_pvw)
	    return wp;
    return NULL;
}

/*
 * Find an existing popup used as the info window, in the current tab page.
 * Return NULL if not found.
 */
    win_T *
popup_find_info_window(void)
{
    win_T *wp;

    // info window popup is always local to tab page.
    FOR_ALL_POPUPWINS_IN_TAB(curtab, wp)
	if (wp->w_popup_flags & POPF_INFO)
	    return wp;
    return NULL;
}
#endif

    void
f_popup_findecho(typval_T *argvars UNUSED, typval_T *rettv)
{
#ifdef HAS_MESSAGE_WINDOW
    rettv->vval.v_number = message_win == NULL ? 0 : message_win->w_id;
#else
    rettv->vval.v_number = 0;
#endif
}

    void
f_popup_findinfo(typval_T *argvars UNUSED, typval_T *rettv)
{
#ifdef FEAT_QUICKFIX
    win_T   *wp = popup_find_info_window();

    rettv->vval.v_number = wp == NULL ? 0 : wp->w_id;
#else
    rettv->vval.v_number = 0;
#endif
}

    void
f_popup_findpreview(typval_T *argvars UNUSED, typval_T *rettv)
{
#ifdef FEAT_QUICKFIX
    win_T   *wp = popup_find_preview_window();

    rettv->vval.v_number = wp == NULL ? 0 : wp->w_id;
#else
    rettv->vval.v_number = 0;
#endif
}

#if defined(FEAT_QUICKFIX) || defined(PROTO)
/*
 * Create a popup to be used as the preview or info window.
 * NOTE: this makes the popup the current window, so that the file can be
 * edited.  However, it must not remain to be the current window, the caller
 * must make sure of that.
 */
    int
popup_create_preview_window(int info)
{
    win_T *wp = popup_create(NULL, NULL, info ? TYPE_INFO : TYPE_PREVIEW);

    if (wp == NULL)
	return FAIL;
    if (info)
	wp->w_popup_flags |= POPF_INFO;
    else
	wp->w_p_pvw = TRUE;

    // Set the width to a reasonable value, so that w_topline can be computed.
    if (wp->w_minwidth > 0)
	wp->w_width = wp->w_minwidth;
    else if (wp->w_maxwidth > 0)
	wp->w_width = wp->w_maxwidth;
    else
	wp->w_width = curwin->w_width;

    // Will switch to another buffer soon, dummy one can be wiped.
    wp->w_buffer->b_locked = FALSE;

    win_enter(wp, FALSE);
    return OK;
}

/*
 * Close any preview popup.
 */
    void
popup_close_preview(void)
{
    win_T *wp = popup_find_preview_window();

    if (wp != NULL)
	popup_close_with_retval(wp, -1);
}

/*
 * Hide the info popup.
 */
    void
popup_hide_info(void)
{
    win_T *wp = popup_find_info_window();

    if (wp != NULL)
	popup_hide(wp);
}

/*
 * Close any info popup.
 */
    void
popup_close_info(void)
{
    win_T *wp = popup_find_info_window();

    if (wp != NULL)
	popup_close_with_retval(wp, -1);
}
#endif

#if defined(HAS_MESSAGE_WINDOW) || defined(PROTO)

/*
 * Get the message window.
 * Returns NULL if something failed.
 */
    win_T *
popup_get_message_win(void)
{
    if (message_win != NULL)
	return message_win;

    int i;

    message_win = popup_create(NULL, NULL, TYPE_MESSAGE_WIN);

    if (message_win == NULL)
	return NULL;

    // use the full screen width
    message_win->w_width = Columns;

    // position at bottom of screen
    message_win->w_popup_pos = POPPOS_BOTTOM;
    message_win->w_wantcol = 1;
    message_win->w_minwidth = 9999;
    message_win->w_firstline = -1;

    // no padding, border at the top
    for (i = 0; i < 4; ++i)
	message_win->w_popup_padding[i] = 0;
    for (i = 1; i < 4; ++i)
	message_win->w_popup_border[i] = 0;

    if (message_win->w_popup_timer != NULL)
	message_win->w_popup_timer->tr_keep = TRUE;
    return message_win;
}

/*
 * If the message window is not visible: show it
 * If the message window is visible: reset the timeout
 */
    void
popup_show_message_win(void)
{
    if (message_win == NULL)
	return;

    if ((message_win->w_popup_flags & POPF_HIDDEN) != 0)
    {
	// the highlight may have changed.
	popup_update_color(message_win, TYPE_MESSAGE_WIN);
	popup_show(message_win);
    }
    start_message_win_timer = TRUE;
}

    static void
may_start_message_win_timer(win_T *wp)
{
    if (wp == message_win && start_message_win_timer)
    {
	if (message_win->w_popup_timer != NULL)
	{
	    message_win->w_popup_timer->tr_interval = message_win_time;
	    timer_start(message_win->w_popup_timer);
	    message_win_time = 3000;
	}
	start_message_win_timer = FALSE;
    }
}

    int
popup_message_win_visible(void)
{
    return message_win != NULL
	&& (message_win->w_popup_flags & POPF_HIDDEN) == 0;
}

/*
 * If the message window is visible: hide it.
 */
    void
popup_hide_message_win(void)
{
    if (message_win != NULL)
	popup_hide(message_win);
}

// Values saved in start_echowindow() and restored in end_echowindow()
static int save_msg_didout = FALSE;
static int save_msg_col = 0;
// Values saved in end_echowindow() and restored in start_echowindow()
static int ew_msg_didout = FALSE;
static int ew_msg_col = 0;

/*
 * Invoked before outputting a message for ":echowindow".
 * "time_sec" is the display time, zero means using the default 3 sec.
 */
    void
start_echowindow(int time_sec)
{
    in_echowindow = TRUE;
    save_msg_didout = msg_didout;
    save_msg_col = msg_col;
    msg_didout = ew_msg_didout;
    msg_col = ew_msg_col;
    if (time_sec != 0)
	message_win_time = time_sec * 1000;
}

/*
 * Invoked after outputting a message for ":echowindow".
 */
    void
end_echowindow(void)
{
    in_echowindow = FALSE;

    if ((State & MODE_HITRETURN) == 0)
	// show the message window now
	redraw_cmd(FALSE);

    // do not overwrite messages
    ew_msg_didout = TRUE;
    ew_msg_col = msg_col == 0 ? 1 : msg_col;
    msg_didout = save_msg_didout;
    msg_col = save_msg_col;
}
#endif

/*
 * Close any popup for a text property associated with "win".
 * Return TRUE if a popup was closed.
 */
    int
popup_win_closed(win_T *win)
{
    int	    round;
    win_T   *wp;
    win_T   *next;
    int	    ret = FALSE;

    for (round = 1; round <= 2; ++round)
	for (wp = round == 1 ? first_popupwin : curtab->tp_first_popupwin;
							 wp != NULL; wp = next)
	{
	    next = wp->w_next;
	    if (wp->w_popup_prop_win == win)
	    {
		popup_close_with_retval(wp, -1);
		ret = TRUE;
	    }
	}
    return ret;
}

/*
 * Set the title of the popup window to the file name.
 */
    void
popup_set_title(win_T *wp)
{
    if (wp->w_buffer->b_fname == NULL)
	return;

    char_u	dirname[MAXPATHL];
    size_t	len;

    mch_dirname(dirname, MAXPATHL);
    shorten_buf_fname(wp->w_buffer, dirname, FALSE);

    vim_free(wp->w_popup_title);
    len = STRLEN(wp->w_buffer->b_fname) + 3;
    wp->w_popup_title = alloc((int)len);
    if (wp->w_popup_title != NULL)
	vim_snprintf((char *)wp->w_popup_title, len, " %s ",
		wp->w_buffer->b_fname);
    redraw_win_later(wp, UPD_VALID);
}

# if defined(FEAT_QUICKFIX) || defined(PROTO)
/*
 * If there is a preview window, update the title.
 * Used after changing directory.
 */
    void
popup_update_preview_title(void)
{
    win_T *wp = popup_find_preview_window();

    if (wp != NULL)
	popup_set_title(wp);
}
# endif

#endif // FEAT_PROP_POPUP