new file mode 100644
--- /dev/null
+++ b/src/evalwindow.c
@@ -0,0 +1,1054 @@
+/* vi:set ts=8 sts=4 sw=4 noet:
+ *
+ * VIM - Vi IMproved	by Bram Moolenaar
+ *
+ * Do ":help uganda"  in Vim to read copying and usage conditions.
+ * Do ":help credits" in Vim to see a list of people who contributed.
+ * See README.txt for an overview of the Vim source code.
+ */
+
+/*
+ * evalwindow.c: Window related builtin functions
+ */
+
+#include "vim.h"
+
+#if defined(FEAT_EVAL) || defined(PROTO)
+
+    static int
+win_getid(typval_T *argvars)
+{
+    int	    winnr;
+    win_T   *wp;
+
+    if (argvars[0].v_type == VAR_UNKNOWN)
+	return curwin->w_id;
+    winnr = tv_get_number(&argvars[0]);
+    if (winnr > 0)
+    {
+	if (argvars[1].v_type == VAR_UNKNOWN)
+	    wp = firstwin;
+	else
+	{
+	    tabpage_T	*tp;
+	    int		tabnr = tv_get_number(&argvars[1]);
+
+	    FOR_ALL_TABPAGES(tp)
+		if (--tabnr == 0)
+		    break;
+	    if (tp == NULL)
+		return -1;
+	    if (tp == curtab)
+		wp = firstwin;
+	    else
+		wp = tp->tp_firstwin;
+	}
+	for ( ; wp != NULL; wp = wp->w_next)
+	    if (--winnr == 0)
+		return wp->w_id;
+    }
+    return 0;
+}
+
+    static int
+win_gotoid(typval_T *argvars)
+{
+    win_T	*wp;
+    tabpage_T   *tp;
+    int		id = tv_get_number(&argvars[0]);
+
+    FOR_ALL_TAB_WINDOWS(tp, wp)
+	    if (wp->w_id == id)
+	    {
+		goto_tabpage_win(tp, wp);
+		return 1;
+	    }
+    return 0;
+}
+
+    static void
+win_id2tabwin(typval_T *argvars, list_T *list)
+{
+    win_T	*wp;
+    tabpage_T   *tp;
+    int		winnr = 1;
+    int		tabnr = 1;
+    int		id = tv_get_number(&argvars[0]);
+
+    FOR_ALL_TABPAGES(tp)
+    {
+	FOR_ALL_WINDOWS_IN_TAB(tp, wp)
+	{
+	    if (wp->w_id == id)
+	    {
+		list_append_number(list, tabnr);
+		list_append_number(list, winnr);
+		return;
+	    }
+	    ++winnr;
+	}
+	++tabnr;
+	winnr = 1;
+    }
+    list_append_number(list, 0);
+    list_append_number(list, 0);
+}
+
+/*
+ * Return the window pointer of window "id".
+ */
+    win_T *
+win_id2wp(int id)
+{
+    return win_id2wp_tp(id, NULL);
+}
+
+/*
+ * Return the window and tab pointer of window "id".
+ */
+    win_T *
+win_id2wp_tp(int id, tabpage_T **tpp)
+{
+    win_T	*wp;
+    tabpage_T   *tp;
+
+    FOR_ALL_TAB_WINDOWS(tp, wp)
+	if (wp->w_id == id)
+	{
+	    if (tpp != NULL)
+		*tpp = tp;
+	    return wp;
+	}
+#ifdef FEAT_TEXT_PROP
+    // popup windows are in separate lists
+     FOR_ALL_TABPAGES(tp)
+	 for (wp = tp->tp_first_popupwin; wp != NULL; wp = wp->w_next)
+	     if (wp->w_id == id)
+	     {
+		 if (tpp != NULL)
+		     *tpp = tp;
+		 return wp;
+	     }
+    for (wp = first_popupwin; wp != NULL; wp = wp->w_next)
+	if (wp->w_id == id)
+	{
+	    if (tpp != NULL)
+		*tpp = tp;
+	    return wp;
+	}
+#endif
+
+    return NULL;
+}
+
+    static int
+win_id2win(typval_T *argvars)
+{
+    win_T   *wp;
+    int	    nr = 1;
+    int	    id = tv_get_number(&argvars[0]);
+
+    FOR_ALL_WINDOWS(wp)
+    {
+	if (wp->w_id == id)
+	    return nr;
+	++nr;
+    }
+    return 0;
+}
+
+    void
+win_findbuf(typval_T *argvars, list_T *list)
+{
+    win_T	*wp;
+    tabpage_T   *tp;
+    int		bufnr = tv_get_number(&argvars[0]);
+
+    FOR_ALL_TAB_WINDOWS(tp, wp)
+	    if (wp->w_buffer->b_fnum == bufnr)
+		list_append_number(list, wp->w_id);
+}
+
+/*
+ * Find window specified by "vp" in tabpage "tp".
+ */
+    win_T *
+find_win_by_nr(
+    typval_T	*vp,
+    tabpage_T	*tp)	// NULL for current tab page
+{
+    win_T	*wp;
+    int		nr = (int)tv_get_number_chk(vp, NULL);
+
+    if (nr < 0)
+	return NULL;
+    if (nr == 0)
+	return curwin;
+
+    FOR_ALL_WINDOWS_IN_TAB(tp, wp)
+    {
+	if (nr >= LOWEST_WIN_ID)
+	{
+	    if (wp->w_id == nr)
+		return wp;
+	}
+	else if (--nr <= 0)
+	    break;
+    }
+    if (nr >= LOWEST_WIN_ID)
+    {
+#ifdef FEAT_TEXT_PROP
+	// check tab-local popup windows
+	for (wp = tp->tp_first_popupwin; wp != NULL; wp = wp->w_next)
+	    if (wp->w_id == nr)
+		return wp;
+	// check global popup windows
+	for (wp = first_popupwin; wp != NULL; wp = wp->w_next)
+	    if (wp->w_id == nr)
+		return wp;
+#endif
+	return NULL;
+    }
+    return wp;
+}
+
+/*
+ * Find a window: When using a Window ID in any tab page, when using a number
+ * in the current tab page.
+ */
+    win_T *
+find_win_by_nr_or_id(typval_T *vp)
+{
+    int	nr = (int)tv_get_number_chk(vp, NULL);
+
+    if (nr >= LOWEST_WIN_ID)
+	return win_id2wp(tv_get_number(vp));
+    return find_win_by_nr(vp, NULL);
+}
+
+/*
+ * Find window specified by "wvp" in tabpage "tvp".
+ * Returns the tab page in 'ptp'
+ */
+    win_T *
+find_tabwin(
+    typval_T	*wvp,	// VAR_UNKNOWN for current window
+    typval_T	*tvp,	// VAR_UNKNOWN for current tab page
+    tabpage_T	**ptp)
+{
+    win_T	*wp = NULL;
+    tabpage_T	*tp = NULL;
+    long	n;
+
+    if (wvp->v_type != VAR_UNKNOWN)
+    {
+	if (tvp->v_type != VAR_UNKNOWN)
+	{
+	    n = (long)tv_get_number(tvp);
+	    if (n >= 0)
+		tp = find_tabpage(n);
+	}
+	else
+	    tp = curtab;
+
+	if (tp != NULL)
+	{
+	    wp = find_win_by_nr(wvp, tp);
+	    if (wp == NULL && wvp->v_type == VAR_NUMBER
+						&& wvp->vval.v_number != -1)
+		// A window with the specified number is not found
+		tp = NULL;
+	}
+    }
+    else
+    {
+	wp = curwin;
+	tp = curtab;
+    }
+
+    if (ptp != NULL)
+	*ptp = tp;
+
+    return wp;
+}
+
+/*
+ * Get the layout of the given tab page for winlayout().
+ */
+    static void
+get_framelayout(frame_T *fr, list_T *l, int outer)
+{
+    frame_T	*child;
+    list_T	*fr_list;
+    list_T	*win_list;
+
+    if (fr == NULL)
+	return;
+
+    if (outer)
+	// outermost call from f_winlayout()
+	fr_list = l;
+    else
+    {
+	fr_list = list_alloc();
+	if (fr_list == NULL)
+	    return;
+	list_append_list(l, fr_list);
+    }
+
+    if (fr->fr_layout == FR_LEAF)
+    {
+	if (fr->fr_win != NULL)
+	{
+	    list_append_string(fr_list, (char_u *)"leaf", -1);
+	    list_append_number(fr_list, fr->fr_win->w_id);
+	}
+    }
+    else
+    {
+	list_append_string(fr_list,
+	     fr->fr_layout == FR_ROW ?  (char_u *)"row" : (char_u *)"col", -1);
+
+	win_list = list_alloc();
+	if (win_list == NULL)
+	    return;
+	list_append_list(fr_list, win_list);
+	child = fr->fr_child;
+	while (child != NULL)
+	{
+	    get_framelayout(child, win_list, FALSE);
+	    child = child->fr_next;
+	}
+    }
+}
+
+/*
+ * Common code for tabpagewinnr() and winnr().
+ */
+    static int
+get_winnr(tabpage_T *tp, typval_T *argvar)
+{
+    win_T	*twin;
+    int		nr = 1;
+    win_T	*wp;
+    char_u	*arg;
+
+    twin = (tp == curtab) ? curwin : tp->tp_curwin;
+    if (argvar->v_type != VAR_UNKNOWN)
+    {
+	int	invalid_arg = FALSE;
+
+	arg = tv_get_string_chk(argvar);
+	if (arg == NULL)
+	    nr = 0;		// type error; errmsg already given
+	else if (STRCMP(arg, "$") == 0)
+	    twin = (tp == curtab) ? lastwin : tp->tp_lastwin;
+	else if (STRCMP(arg, "#") == 0)
+	{
+	    twin = (tp == curtab) ? prevwin : tp->tp_prevwin;
+	    if (twin == NULL)
+		nr = 0;
+	}
+	else
+	{
+	    long	count;
+	    char_u	*endp;
+
+	    // Extract the window count (if specified). e.g. winnr('3j')
+	    count = strtol((char *)arg, (char **)&endp, 10);
+	    if (count <= 0)
+		count = 1;	// if count is not specified, default to 1
+	    if (endp != NULL && *endp != '\0')
+	    {
+		if (STRCMP(endp, "j") == 0)
+		    twin = win_vert_neighbor(tp, twin, FALSE, count);
+		else if (STRCMP(endp, "k") == 0)
+		    twin = win_vert_neighbor(tp, twin, TRUE, count);
+		else if (STRCMP(endp, "h") == 0)
+		    twin = win_horz_neighbor(tp, twin, TRUE, count);
+		else if (STRCMP(endp, "l") == 0)
+		    twin = win_horz_neighbor(tp, twin, FALSE, count);
+		else
+		    invalid_arg = TRUE;
+	    }
+	    else
+		invalid_arg = TRUE;
+	}
+
+	if (invalid_arg)
+	{
+	    semsg(_(e_invexpr2), arg);
+	    nr = 0;
+	}
+    }
+
+    if (nr > 0)
+	for (wp = (tp == curtab) ? firstwin : tp->tp_firstwin;
+					      wp != twin; wp = wp->w_next)
+	{
+	    if (wp == NULL)
+	    {
+		// didn't find it in this tabpage
+		nr = 0;
+		break;
+	    }
+	    ++nr;
+	}
+    return nr;
+}
+
+/*
+ * Returns information about a window as a dictionary.
+ */
+    static dict_T *
+get_win_info(win_T *wp, short tpnr, short winnr)
+{
+    dict_T	*dict;
+
+    dict = dict_alloc();
+    if (dict == NULL)
+	return NULL;
+
+    dict_add_number(dict, "tabnr", tpnr);
+    dict_add_number(dict, "winnr", winnr);
+    dict_add_number(dict, "winid", wp->w_id);
+    dict_add_number(dict, "height", wp->w_height);
+    dict_add_number(dict, "winrow", wp->w_winrow + 1);
+    dict_add_number(dict, "topline", wp->w_topline);
+    dict_add_number(dict, "botline", wp->w_botline - 1);
+#ifdef FEAT_MENU
+    dict_add_number(dict, "winbar", wp->w_winbar_height);
+#endif
+    dict_add_number(dict, "width", wp->w_width);
+    dict_add_number(dict, "wincol", wp->w_wincol + 1);
+    dict_add_number(dict, "bufnr", wp->w_buffer->b_fnum);
+
+#ifdef FEAT_TERMINAL
+    dict_add_number(dict, "terminal", bt_terminal(wp->w_buffer));
+#endif
+#ifdef FEAT_QUICKFIX
+    dict_add_number(dict, "quickfix", bt_quickfix(wp->w_buffer));
+    dict_add_number(dict, "loclist",
+		      (bt_quickfix(wp->w_buffer) && wp->w_llist_ref != NULL));
+#endif
+
+    // Add a reference to window variables
+    dict_add_dict(dict, "variables", wp->w_vars);
+
+    return dict;
+}
+
+/*
+ * Returns information (variables, options, etc.) about a tab page
+ * as a dictionary.
+ */
+    static dict_T *
+get_tabpage_info(tabpage_T *tp, int tp_idx)
+{
+    win_T	*wp;
+    dict_T	*dict;
+    list_T	*l;
+
+    dict = dict_alloc();
+    if (dict == NULL)
+	return NULL;
+
+    dict_add_number(dict, "tabnr", tp_idx);
+
+    l = list_alloc();
+    if (l != NULL)
+    {
+	for (wp = (tp == curtab) ? firstwin : tp->tp_firstwin;
+						   wp != NULL; wp = wp->w_next)
+	    list_append_number(l, (varnumber_T)wp->w_id);
+	dict_add_list(dict, "windows", l);
+    }
+
+    // Make a reference to tabpage variables
+    dict_add_dict(dict, "variables", tp->tp_vars);
+
+    return dict;
+}
+
+/*
+ * "gettabinfo()" function
+ */
+    void
+f_gettabinfo(typval_T *argvars, typval_T *rettv)
+{
+    tabpage_T	*tp, *tparg = NULL;
+    dict_T	*d;
+    int		tpnr = 0;
+
+    if (rettv_list_alloc(rettv) != OK)
+	return;
+
+    if (argvars[0].v_type != VAR_UNKNOWN)
+    {
+	// Information about one tab page
+	tparg = find_tabpage((int)tv_get_number_chk(&argvars[0], NULL));
+	if (tparg == NULL)
+	    return;
+    }
+
+    // Get information about a specific tab page or all tab pages
+    FOR_ALL_TABPAGES(tp)
+    {
+	tpnr++;
+	if (tparg != NULL && tp != tparg)
+	    continue;
+	d = get_tabpage_info(tp, tpnr);
+	if (d != NULL)
+	    list_append_dict(rettv->vval.v_list, d);
+	if (tparg != NULL)
+	    return;
+    }
+}
+
+/*
+ * "getwininfo()" function
+ */
+    void
+f_getwininfo(typval_T *argvars, typval_T *rettv)
+{
+    tabpage_T	*tp;
+    win_T	*wp = NULL, *wparg = NULL;
+    dict_T	*d;
+    short	tabnr = 0, winnr;
+
+    if (rettv_list_alloc(rettv) != OK)
+	return;
+
+    if (argvars[0].v_type != VAR_UNKNOWN)
+    {
+	wparg = win_id2wp(tv_get_number(&argvars[0]));
+	if (wparg == NULL)
+	    return;
+    }
+
+    // Collect information about either all the windows across all the tab
+    // pages or one particular window.
+    FOR_ALL_TABPAGES(tp)
+    {
+	tabnr++;
+	winnr = 0;
+	FOR_ALL_WINDOWS_IN_TAB(tp, wp)
+	{
+	    winnr++;
+	    if (wparg != NULL && wp != wparg)
+		continue;
+	    d = get_win_info(wp, tabnr, winnr);
+	    if (d != NULL)
+		list_append_dict(rettv->vval.v_list, d);
+	    if (wparg != NULL)
+		// found information about a specific window
+		return;
+	}
+    }
+}
+
+/*
+ * "getwinpos({timeout})" function
+ */
+    void
+f_getwinpos(typval_T *argvars UNUSED, typval_T *rettv)
+{
+    int x = -1;
+    int y = -1;
+
+    if (rettv_list_alloc(rettv) == FAIL)
+	return;
+#if defined(FEAT_GUI) \
+	|| (defined(HAVE_TGETENT) && defined(FEAT_TERMRESPONSE)) \
+	|| defined(MSWIN)
+    {
+	varnumber_T timeout = 100;
+
+	if (argvars[0].v_type != VAR_UNKNOWN)
+	    timeout = tv_get_number(&argvars[0]);
+
+	(void)ui_get_winpos(&x, &y, timeout);
+    }
+#endif
+    list_append_number(rettv->vval.v_list, (varnumber_T)x);
+    list_append_number(rettv->vval.v_list, (varnumber_T)y);
+}
+
+
+/*
+ * "getwinposx()" function
+ */
+    void
+f_getwinposx(typval_T *argvars UNUSED, typval_T *rettv)
+{
+    rettv->vval.v_number = -1;
+#if defined(FEAT_GUI) \
+	|| (defined(HAVE_TGETENT) && defined(FEAT_TERMRESPONSE)) \
+	|| defined(MSWIN)
+
+    {
+	int	    x, y;
+
+	if (ui_get_winpos(&x, &y, 100) == OK)
+	    rettv->vval.v_number = x;
+    }
+#endif
+}
+
+/*
+ * "getwinposy()" function
+ */
+    void
+f_getwinposy(typval_T *argvars UNUSED, typval_T *rettv)
+{
+    rettv->vval.v_number = -1;
+#if defined(FEAT_GUI) \
+	|| (defined(HAVE_TGETENT) && defined(FEAT_TERMRESPONSE)) \
+	|| defined(MSWIN)
+    {
+	int	    x, y;
+
+	if (ui_get_winpos(&x, &y, 100) == OK)
+	    rettv->vval.v_number = y;
+    }
+#endif
+}
+
+/*
+ * "tabpagenr()" function
+ */
+    void
+f_tabpagenr(typval_T *argvars UNUSED, typval_T *rettv)
+{
+    int		nr = 1;
+    char_u	*arg;
+
+    if (argvars[0].v_type != VAR_UNKNOWN)
+    {
+	arg = tv_get_string_chk(&argvars[0]);
+	nr = 0;
+	if (arg != NULL)
+	{
+	    if (STRCMP(arg, "$") == 0)
+		nr = tabpage_index(NULL) - 1;
+	    else
+		semsg(_(e_invexpr2), arg);
+	}
+    }
+    else
+	nr = tabpage_index(curtab);
+    rettv->vval.v_number = nr;
+}
+
+/*
+ * "tabpagewinnr()" function
+ */
+    void
+f_tabpagewinnr(typval_T *argvars UNUSED, typval_T *rettv)
+{
+    int		nr = 1;
+    tabpage_T	*tp;
+
+    tp = find_tabpage((int)tv_get_number(&argvars[0]));
+    if (tp == NULL)
+	nr = 0;
+    else
+	nr = get_winnr(tp, &argvars[1]);
+    rettv->vval.v_number = nr;
+}
+
+/*
+ * "win_execute()" function
+ */
+    void
+f_win_execute(typval_T *argvars, typval_T *rettv)
+{
+    int		id = (int)tv_get_number(argvars);
+    tabpage_T	*tp;
+    win_T	*wp = win_id2wp_tp(id, &tp);
+    win_T	*save_curwin;
+    tabpage_T	*save_curtab;
+
+    if (wp != NULL && tp != NULL)
+    {
+	if (switch_win_noblock(&save_curwin, &save_curtab, wp, tp, TRUE) == OK)
+	{
+	    check_cursor();
+	    execute_common(argvars, rettv, 1);
+	}
+	restore_win_noblock(save_curwin, save_curtab, TRUE);
+    }
+}
+
+/*
+ * "win_findbuf()" function
+ */
+    void
+f_win_findbuf(typval_T *argvars, typval_T *rettv)
+{
+    if (rettv_list_alloc(rettv) != FAIL)
+	win_findbuf(argvars, rettv->vval.v_list);
+}
+
+/*
+ * "win_getid()" function
+ */
+    void
+f_win_getid(typval_T *argvars, typval_T *rettv)
+{
+    rettv->vval.v_number = win_getid(argvars);
+}
+
+/*
+ * "win_gotoid()" function
+ */
+    void
+f_win_gotoid(typval_T *argvars, typval_T *rettv)
+{
+    rettv->vval.v_number = win_gotoid(argvars);
+}
+
+/*
+ * "win_id2tabwin()" function
+ */
+    void
+f_win_id2tabwin(typval_T *argvars, typval_T *rettv)
+{
+    if (rettv_list_alloc(rettv) != FAIL)
+	win_id2tabwin(argvars, rettv->vval.v_list);
+}
+
+/*
+ * "win_id2win()" function
+ */
+    void
+f_win_id2win(typval_T *argvars, typval_T *rettv)
+{
+    rettv->vval.v_number = win_id2win(argvars);
+}
+
+/*
+ * "win_screenpos()" function
+ */
+    void
+f_win_screenpos(typval_T *argvars, typval_T *rettv)
+{
+    win_T	*wp;
+
+    if (rettv_list_alloc(rettv) == FAIL)
+	return;
+
+    wp = find_win_by_nr_or_id(&argvars[0]);
+    list_append_number(rettv->vval.v_list, wp == NULL ? 0 : wp->w_winrow + 1);
+    list_append_number(rettv->vval.v_list, wp == NULL ? 0 : wp->w_wincol + 1);
+}
+
+/*
+ * "winbufnr(nr)" function
+ */
+    void
+f_winbufnr(typval_T *argvars, typval_T *rettv)
+{
+    win_T	*wp;
+
+    wp = find_win_by_nr_or_id(&argvars[0]);
+    if (wp == NULL)
+	rettv->vval.v_number = -1;
+    else
+	rettv->vval.v_number = wp->w_buffer->b_fnum;
+}
+
+/*
+ * "wincol()" function
+ */
+    void
+f_wincol(typval_T *argvars UNUSED, typval_T *rettv)
+{
+    validate_cursor();
+    rettv->vval.v_number = curwin->w_wcol + 1;
+}
+
+/*
+ * "winheight(nr)" function
+ */
+    void
+f_winheight(typval_T *argvars, typval_T *rettv)
+{
+    win_T	*wp;
+
+    wp = find_win_by_nr_or_id(&argvars[0]);
+    if (wp == NULL)
+	rettv->vval.v_number = -1;
+    else
+	rettv->vval.v_number = wp->w_height;
+}
+
+/*
+ * "winlayout()" function
+ */
+    void
+f_winlayout(typval_T *argvars, typval_T *rettv)
+{
+    tabpage_T	*tp;
+
+    if (rettv_list_alloc(rettv) != OK)
+	return;
+
+    if (argvars[0].v_type == VAR_UNKNOWN)
+	tp = curtab;
+    else
+    {
+	tp = find_tabpage((int)tv_get_number(&argvars[0]));
+	if (tp == NULL)
+	    return;
+    }
+
+    get_framelayout(tp->tp_topframe, rettv->vval.v_list, TRUE);
+}
+
+/*
+ * "winline()" function
+ */
+    void
+f_winline(typval_T *argvars UNUSED, typval_T *rettv)
+{
+    validate_cursor();
+    rettv->vval.v_number = curwin->w_wrow + 1;
+}
+
+/*
+ * "winnr()" function
+ */
+    void
+f_winnr(typval_T *argvars UNUSED, typval_T *rettv)
+{
+    int		nr = 1;
+
+    nr = get_winnr(curtab, &argvars[0]);
+    rettv->vval.v_number = nr;
+}
+
+/*
+ * "winrestcmd()" function
+ */
+    void
+f_winrestcmd(typval_T *argvars UNUSED, typval_T *rettv)
+{
+    win_T	*wp;
+    int		winnr = 1;
+    garray_T	ga;
+    char_u	buf[50];
+
+    ga_init2(&ga, (int)sizeof(char), 70);
+    FOR_ALL_WINDOWS(wp)
+    {
+	sprintf((char *)buf, "%dresize %d|", winnr, wp->w_height);
+	ga_concat(&ga, buf);
+	sprintf((char *)buf, "vert %dresize %d|", winnr, wp->w_width);
+	ga_concat(&ga, buf);
+	++winnr;
+    }
+    ga_append(&ga, NUL);
+
+    rettv->vval.v_string = ga.ga_data;
+    rettv->v_type = VAR_STRING;
+}
+
+/*
+ * "winrestview()" function
+ */
+    void
+f_winrestview(typval_T *argvars, typval_T *rettv UNUSED)
+{
+    dict_T	*dict;
+
+    if (argvars[0].v_type != VAR_DICT
+	    || (dict = argvars[0].vval.v_dict) == NULL)
+	emsg(_(e_invarg));
+    else
+    {
+	if (dict_find(dict, (char_u *)"lnum", -1) != NULL)
+	    curwin->w_cursor.lnum = (linenr_T)dict_get_number(dict, (char_u *)"lnum");
+	if (dict_find(dict, (char_u *)"col", -1) != NULL)
+	    curwin->w_cursor.col = (colnr_T)dict_get_number(dict, (char_u *)"col");
+	if (dict_find(dict, (char_u *)"coladd", -1) != NULL)
+	    curwin->w_cursor.coladd = (colnr_T)dict_get_number(dict, (char_u *)"coladd");
+	if (dict_find(dict, (char_u *)"curswant", -1) != NULL)
+	{
+	    curwin->w_curswant = (colnr_T)dict_get_number(dict, (char_u *)"curswant");
+	    curwin->w_set_curswant = FALSE;
+	}
+
+	if (dict_find(dict, (char_u *)"topline", -1) != NULL)
+	    set_topline(curwin, (linenr_T)dict_get_number(dict, (char_u *)"topline"));
+#ifdef FEAT_DIFF
+	if (dict_find(dict, (char_u *)"topfill", -1) != NULL)
+	    curwin->w_topfill = (int)dict_get_number(dict, (char_u *)"topfill");
+#endif
+	if (dict_find(dict, (char_u *)"leftcol", -1) != NULL)
+	    curwin->w_leftcol = (colnr_T)dict_get_number(dict, (char_u *)"leftcol");
+	if (dict_find(dict, (char_u *)"skipcol", -1) != NULL)
+	    curwin->w_skipcol = (colnr_T)dict_get_number(dict, (char_u *)"skipcol");
+
+	check_cursor();
+	win_new_height(curwin, curwin->w_height);
+	win_new_width(curwin, curwin->w_width);
+	changed_window_setting();
+
+	if (curwin->w_topline <= 0)
+	    curwin->w_topline = 1;
+	if (curwin->w_topline > curbuf->b_ml.ml_line_count)
+	    curwin->w_topline = curbuf->b_ml.ml_line_count;
+#ifdef FEAT_DIFF
+	check_topfill(curwin, TRUE);
+#endif
+    }
+}
+
+/*
+ * "winsaveview()" function
+ */
+    void
+f_winsaveview(typval_T *argvars UNUSED, typval_T *rettv)
+{
+    dict_T	*dict;
+
+    if (rettv_dict_alloc(rettv) == FAIL)
+	return;
+    dict = rettv->vval.v_dict;
+
+    dict_add_number(dict, "lnum", (long)curwin->w_cursor.lnum);
+    dict_add_number(dict, "col", (long)curwin->w_cursor.col);
+    dict_add_number(dict, "coladd", (long)curwin->w_cursor.coladd);
+    update_curswant();
+    dict_add_number(dict, "curswant", (long)curwin->w_curswant);
+
+    dict_add_number(dict, "topline", (long)curwin->w_topline);
+#ifdef FEAT_DIFF
+    dict_add_number(dict, "topfill", (long)curwin->w_topfill);
+#endif
+    dict_add_number(dict, "leftcol", (long)curwin->w_leftcol);
+    dict_add_number(dict, "skipcol", (long)curwin->w_skipcol);
+}
+
+/*
+ * "winwidth(nr)" function
+ */
+    void
+f_winwidth(typval_T *argvars, typval_T *rettv)
+{
+    win_T	*wp;
+
+    wp = find_win_by_nr_or_id(&argvars[0]);
+    if (wp == NULL)
+	rettv->vval.v_number = -1;
+    else
+	rettv->vval.v_number = wp->w_width;
+}
+#endif // FEAT_EVAL
+
+#if defined(FEAT_EVAL) || defined(FEAT_PYTHON) || defined(FEAT_PYTHON3) \
+	|| defined(PROTO)
+/*
+ * Set "win" to be the curwin and "tp" to be the current tab page.
+ * restore_win() MUST be called to undo, also when FAIL is returned.
+ * No autocommands will be executed until restore_win() is called.
+ * When "no_display" is TRUE the display won't be affected, no redraw is
+ * triggered, another tabpage access is limited.
+ * Returns FAIL if switching to "win" failed.
+ */
+    int
+switch_win(
+    win_T	**save_curwin,
+    tabpage_T	**save_curtab,
+    win_T	*win,
+    tabpage_T	*tp,
+    int		no_display)
+{
+    block_autocmds();
+    return switch_win_noblock(save_curwin, save_curtab, win, tp, no_display);
+}
+
+/*
+ * As switch_win() but without blocking autocommands.
+ */
+    int
+switch_win_noblock(
+    win_T	**save_curwin,
+    tabpage_T	**save_curtab,
+    win_T	*win,
+    tabpage_T	*tp,
+    int		no_display)
+{
+    *save_curwin = curwin;
+    if (tp != NULL)
+    {
+	*save_curtab = curtab;
+	if (no_display)
+	{
+	    curtab->tp_firstwin = firstwin;
+	    curtab->tp_lastwin = lastwin;
+	    curtab = tp;
+	    firstwin = curtab->tp_firstwin;
+	    lastwin = curtab->tp_lastwin;
+	}
+	else
+	    goto_tabpage_tp(tp, FALSE, FALSE);
+    }
+    if (!win_valid(win))
+	return FAIL;
+    curwin = win;
+    curbuf = curwin->w_buffer;
+    return OK;
+}
+
+/*
+ * Restore current tabpage and window saved by switch_win(), if still valid.
+ * When "no_display" is TRUE the display won't be affected, no redraw is
+ * triggered.
+ */
+    void
+restore_win(
+    win_T	*save_curwin,
+    tabpage_T	*save_curtab,
+    int		no_display)
+{
+    restore_win_noblock(save_curwin, save_curtab, no_display);
+    unblock_autocmds();
+}
+
+/*
+ * As restore_win() but without unblocking autocommands.
+ */
+    void
+restore_win_noblock(
+    win_T	*save_curwin,
+    tabpage_T	*save_curtab,
+    int		no_display)
+{
+    if (save_curtab != NULL && valid_tabpage(save_curtab))
+    {
+	if (no_display)
+	{
+	    curtab->tp_firstwin = firstwin;
+	    curtab->tp_lastwin = lastwin;
+	    curtab = save_curtab;
+	    firstwin = curtab->tp_firstwin;
+	    lastwin = curtab->tp_lastwin;
+	}
+	else
+	    goto_tabpage_tp(save_curtab, FALSE, FALSE);
+    }
+    if (win_valid(save_curwin))
+    {
+	curwin = save_curwin;
+	curbuf = curwin->w_buffer;
+    }
+# ifdef FEAT_TEXT_PROP
+    else if (WIN_IS_POPUP(curwin))
+	// original window was closed and now we're in a popup window: Go
+	// to the first valid window.
+	win_goto(firstwin);
+# endif
+}
+#endif