Adding upstream version 3:4.8.29.upstream/3%4.8.29upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1092 insertions, 0 deletions

diff --git a/lib/widget/menu.c b/lib/widget/menu.c
new file mode 100644
index 0000000..32ee74c
--- /dev/null
+++ b/lib/widget/menu.c
@@ -0,0 +1,1092 @@
+/*
+   Pulldown menu code
+
+   Copyright (C) 1994-2022
+   Free Software Foundation, Inc.
+
+   Written by:
+   Andrew Borodin <aborodin@vmail.ru>, 2012-2022
+
+   This file is part of the Midnight Commander.
+
+   The Midnight Commander is free software: you can redistribute it
+   and/or modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation, either version 3 of the License,
+   or (at your option) any later version.
+
+   The Midnight Commander is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** \file menu.c
+ *  \brief Source: pulldown menu code
+ */
+
+#include <config.h>
+
+#include <ctype.h>
+#include <stdarg.h>
+#include <string.h>
+#include <sys/types.h>
+
+#include "lib/global.h"
+
+#include "lib/tty/tty.h"
+#include "lib/skin.h"
+#include "lib/tty/key.h"        /* key macros */
+#include "lib/strutil.h"
+#include "lib/widget.h"
+#include "lib/event.h"          /* mc_event_raise() */
+
+/*** global variables ****************************************************************************/
+
+const global_keymap_t *menu_map = NULL;
+
+/*** file scope macro definitions ****************************************************************/
+
+#define MENUENTRY(x) ((menu_entry_t *)(x))
+#define MENU(x) ((menu_t *)(x))
+
+/*** file scope type declarations ****************************************************************/
+
+struct menu_entry_t
+{
+    unsigned char first_letter;
+    hotkey_t text;
+    long command;
+    char *shortcut;
+};
+
+struct menu_t
+{
+    int start_x;                /* position relative to menubar start */
+    hotkey_t text;
+    GList *entries;
+    size_t max_entry_len;       /* cached max length of entry texts (text + shortcut) */
+    size_t max_hotkey_len;      /* cached max length of shortcuts */
+    unsigned int selected;      /* pointer to current menu entry */
+    char *help_node;
+};
+
+/*** file scope variables ************************************************************************/
+
+/*** file scope functions ************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+menu_arrange (menu_t * menu, dlg_shortcut_str get_shortcut)
+{
+    if (menu != NULL)
+    {
+        GList *i;
+        size_t max_shortcut_len = 0;
+
+        menu->max_entry_len = 1;
+        menu->max_hotkey_len = 1;
+
+        for (i = menu->entries; i != NULL; i = g_list_next (i))
+        {
+            menu_entry_t *entry = MENUENTRY (i->data);
+
+            if (entry != NULL)
+            {
+                size_t len;
+
+                len = (size_t) hotkey_width (entry->text);
+                menu->max_hotkey_len = MAX (menu->max_hotkey_len, len);
+
+                if (get_shortcut != NULL)
+                    entry->shortcut = get_shortcut (entry->command);
+
+                if (entry->shortcut != NULL)
+                {
+                    len = (size_t) str_term_width1 (entry->shortcut);
+                    max_shortcut_len = MAX (max_shortcut_len, len);
+                }
+            }
+        }
+
+        menu->max_entry_len = menu->max_hotkey_len + max_shortcut_len;
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+menubar_paint_idx (const WMenuBar * menubar, unsigned int idx, int color)
+{
+    const WRect *w = &CONST_WIDGET (menubar)->rect;
+    const menu_t *menu = MENU (g_list_nth_data (menubar->menu, menubar->selected));
+    const menu_entry_t *entry = MENUENTRY (g_list_nth_data (menu->entries, idx));
+    const int y = 2 + idx;
+    int x = menu->start_x;
+
+    if (x + menu->max_entry_len + 4 > (gsize) w->cols)
+        x = w->cols - menu->max_entry_len - 4;
+
+    if (entry == NULL)
+    {
+        /* menu separator */
+        tty_setcolor (MENU_ENTRY_COLOR);
+
+        widget_gotoyx (menubar, y, x - 1);
+        tty_print_alt_char (ACS_LTEE, FALSE);
+        tty_draw_hline (w->y + y, w->x + x, ACS_HLINE, menu->max_entry_len + 3);
+        widget_gotoyx (menubar, y, x + menu->max_entry_len + 3);
+        tty_print_alt_char (ACS_RTEE, FALSE);
+    }
+    else
+    {
+        int yt, xt;
+
+        /* menu text */
+        tty_setcolor (color);
+        widget_gotoyx (menubar, y, x);
+        tty_print_char ((unsigned char) entry->first_letter);
+        tty_getyx (&yt, &xt);
+        tty_draw_hline (yt, xt, ' ', menu->max_entry_len + 2);  /* clear line */
+        tty_print_string (entry->text.start);
+
+        if (entry->text.hotkey != NULL)
+        {
+            tty_setcolor (color == MENU_SELECTED_COLOR ? MENU_HOTSEL_COLOR : MENU_HOT_COLOR);
+            tty_print_string (entry->text.hotkey);
+            tty_setcolor (color);
+        }
+
+        if (entry->text.end != NULL)
+            tty_print_string (entry->text.end);
+
+        if (entry->shortcut != NULL)
+        {
+            widget_gotoyx (menubar, y, x + menu->max_hotkey_len + 3);
+            tty_print_string (entry->shortcut);
+        }
+
+        /* move cursor to the start of entry text */
+        widget_gotoyx (menubar, y, x + 1);
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+menubar_draw_drop (const WMenuBar * menubar)
+{
+    const WRect *w = &CONST_WIDGET (menubar)->rect;
+    const menu_t *menu = MENU (g_list_nth_data (menubar->menu, menubar->selected));
+    const unsigned int count = g_list_length (menu->entries);
+    int column = menu->start_x - 1;
+    unsigned int i;
+
+    if (column + menu->max_entry_len + 5 > (gsize) w->cols)
+        column = w->cols - menu->max_entry_len - 5;
+
+    if (mc_global.tty.shadows)
+        tty_draw_box_shadow (w->y + 1, w->x + column, count + 2, menu->max_entry_len + 5,
+                             SHADOW_COLOR);
+
+    tty_setcolor (MENU_ENTRY_COLOR);
+    tty_draw_box (w->y + 1, w->x + column, count + 2, menu->max_entry_len + 5, FALSE);
+
+    for (i = 0; i < count; i++)
+        menubar_paint_idx (menubar, i,
+                           i == menu->selected ? MENU_SELECTED_COLOR : MENU_ENTRY_COLOR);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+menubar_set_color (const WMenuBar * menubar, gboolean current, gboolean hotkey)
+{
+    if (!widget_get_state (CONST_WIDGET (menubar), WST_FOCUSED))
+        tty_setcolor (MENU_INACTIVE_COLOR);
+    else if (current)
+        tty_setcolor (hotkey ? MENU_HOTSEL_COLOR : MENU_SELECTED_COLOR);
+    else
+        tty_setcolor (hotkey ? MENU_HOT_COLOR : MENU_ENTRY_COLOR);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+menubar_draw (const WMenuBar * menubar)
+{
+    const WRect *w = &CONST_WIDGET (menubar)->rect;
+    GList *i;
+
+    /* First draw the complete menubar */
+    tty_setcolor (widget_get_state (WIDGET (menubar), WST_FOCUSED) ? MENU_ENTRY_COLOR :
+                  MENU_INACTIVE_COLOR);
+    tty_draw_hline (w->y, w->x, ' ', w->cols);
+
+    /* Now each one of the entries */
+    for (i = menubar->menu; i != NULL; i = g_list_next (i))
+    {
+        menu_t *menu = MENU (i->data);
+        gboolean is_selected = (menubar->selected == (gsize) g_list_position (menubar->menu, i));
+
+        menubar_set_color (menubar, is_selected, FALSE);
+        widget_gotoyx (menubar, 0, menu->start_x);
+
+        tty_print_char (' ');
+        tty_print_string (menu->text.start);
+
+        if (menu->text.hotkey != NULL)
+        {
+            menubar_set_color (menubar, is_selected, TRUE);
+            tty_print_string (menu->text.hotkey);
+            menubar_set_color (menubar, is_selected, FALSE);
+        }
+
+        if (menu->text.end != NULL)
+            tty_print_string (menu->text.end);
+
+        tty_print_char (' ');
+    }
+
+    if (menubar->is_dropped)
+        menubar_draw_drop (menubar);
+    else
+        widget_gotoyx (menubar, 0,
+                       MENU (g_list_nth_data (menubar->menu, menubar->selected))->start_x);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+menubar_remove (WMenuBar * menubar)
+{
+    Widget *g;
+
+    if (!menubar->is_dropped)
+        return;
+
+    /* HACK: before refresh the dialog, change the current widget to keep the order
+       of overlapped widgets. This is useful in multi-window editor.
+       In general, menubar should be a special object, not an ordinary widget
+       in the current dialog. */
+    g = WIDGET (WIDGET (menubar)->owner);
+    GROUP (g)->current = widget_find (g, widget_find_by_id (g, menubar->previous_widget));
+
+    menubar->is_dropped = FALSE;
+    do_refresh ();
+    menubar->is_dropped = TRUE;
+
+    /* restore current widget */
+    GROUP (g)->current = widget_find (g, WIDGET (menubar));
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+menubar_left (WMenuBar * menubar)
+{
+    menubar_remove (menubar);
+    if (menubar->selected == 0)
+        menubar->selected = g_list_length (menubar->menu) - 1;
+    else
+        menubar->selected--;
+    menubar_draw (menubar);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+menubar_right (WMenuBar * menubar)
+{
+    menubar_remove (menubar);
+    menubar->selected = (menubar->selected + 1) % g_list_length (menubar->menu);
+    menubar_draw (menubar);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+menubar_finish (WMenuBar * menubar)
+{
+    Widget *w = WIDGET (menubar);
+
+    menubar->is_dropped = FALSE;
+    w->rect.lines = 1;
+    widget_want_hotkey (w, FALSE);
+    widget_set_options (w, WOP_SELECTABLE, FALSE);
+
+    if (!mc_global.keybar_visible)
+        widget_hide (w);
+    else
+    {
+        /* Move the menubar to the bottom so that widgets displayed on top of
+         * an "invisible" menubar get the first chance to respond to mouse events. */
+        widget_set_bottom (w);
+    }
+
+    /* background must be bottom */
+    if (DIALOG (w->owner)->bg != NULL)
+        widget_set_bottom (WIDGET (DIALOG (w->owner)->bg));
+
+    group_select_widget_by_id (w->owner, menubar->previous_widget);
+    do_refresh ();
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+menubar_drop (WMenuBar * menubar, unsigned int selected)
+{
+    menubar->is_dropped = TRUE;
+    menubar->selected = selected;
+    menubar_draw (menubar);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+menubar_execute (WMenuBar * menubar)
+{
+    const menu_t *menu = MENU (g_list_nth_data (menubar->menu, menubar->selected));
+    const menu_entry_t *entry = MENUENTRY (g_list_nth_data (menu->entries, menu->selected));
+
+    if ((entry != NULL) && (entry->command != CK_IgnoreKey))
+    {
+        Widget *w = WIDGET (menubar);
+
+        mc_global.widget.is_right = (menubar->selected != 0);
+        menubar_finish (menubar);
+        send_message (w->owner, w, MSG_ACTION, entry->command, NULL);
+        do_refresh ();
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+menubar_down (WMenuBar * menubar)
+{
+    menu_t *menu = MENU (g_list_nth_data (menubar->menu, menubar->selected));
+    const unsigned int len = g_list_length (menu->entries);
+    menu_entry_t *entry;
+
+    menubar_paint_idx (menubar, menu->selected, MENU_ENTRY_COLOR);
+
+    do
+    {
+        menu->selected = (menu->selected + 1) % len;
+        entry = MENUENTRY (g_list_nth_data (menu->entries, menu->selected));
+    }
+    while ((entry == NULL) || (entry->command == CK_IgnoreKey));
+
+    menubar_paint_idx (menubar, menu->selected, MENU_SELECTED_COLOR);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+menubar_up (WMenuBar * menubar)
+{
+    menu_t *menu = MENU (g_list_nth_data (menubar->menu, menubar->selected));
+    const unsigned int len = g_list_length (menu->entries);
+    menu_entry_t *entry;
+
+    menubar_paint_idx (menubar, menu->selected, MENU_ENTRY_COLOR);
+
+    do
+    {
+        if (menu->selected == 0)
+            menu->selected = len - 1;
+        else
+            menu->selected--;
+        entry = MENUENTRY (g_list_nth_data (menu->entries, menu->selected));
+    }
+    while ((entry == NULL) || (entry->command == CK_IgnoreKey));
+
+    menubar_paint_idx (menubar, menu->selected, MENU_SELECTED_COLOR);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+menubar_first (WMenuBar * menubar)
+{
+    if (menubar->is_dropped)
+    {
+        menu_t *menu = MENU (g_list_nth_data (menubar->menu, menubar->selected));
+
+        if (menu->selected == 0)
+            return;
+
+        menubar_paint_idx (menubar, menu->selected, MENU_ENTRY_COLOR);
+
+        menu->selected = 0;
+
+        while (TRUE)
+        {
+            menu_entry_t *entry;
+
+            entry = MENUENTRY (g_list_nth_data (menu->entries, menu->selected));
+
+            if ((entry == NULL) || (entry->command == CK_IgnoreKey))
+                menu->selected++;
+            else
+                break;
+        }
+
+        menubar_paint_idx (menubar, menu->selected, MENU_SELECTED_COLOR);
+    }
+    else
+    {
+        menubar->selected = 0;
+        menubar_draw (menubar);
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+menubar_last (WMenuBar * menubar)
+{
+    if (menubar->is_dropped)
+    {
+        menu_t *menu = MENU (g_list_nth_data (menubar->menu, menubar->selected));
+        const unsigned int len = g_list_length (menu->entries);
+        menu_entry_t *entry;
+
+        if (menu->selected == len - 1)
+            return;
+
+        menubar_paint_idx (menubar, menu->selected, MENU_ENTRY_COLOR);
+
+        menu->selected = len;
+
+        do
+        {
+            menu->selected--;
+            entry = MENUENTRY (g_list_nth_data (menu->entries, menu->selected));
+        }
+        while ((entry == NULL) || (entry->command == CK_IgnoreKey));
+
+        menubar_paint_idx (menubar, menu->selected, MENU_SELECTED_COLOR);
+    }
+    else
+    {
+        menubar->selected = g_list_length (menubar->menu) - 1;
+        menubar_draw (menubar);
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static cb_ret_t
+menubar_try_drop_menu (WMenuBar * menubar, int hotkey)
+{
+    GList *i;
+
+    for (i = menubar->menu; i != NULL; i = g_list_next (i))
+    {
+        menu_t *menu = MENU (i->data);
+
+        if (menu->text.hotkey != NULL && hotkey == g_ascii_tolower (menu->text.hotkey[0]))
+        {
+            menubar_drop (menubar, g_list_position (menubar->menu, i));
+            return MSG_HANDLED;
+        }
+    }
+
+    return MSG_NOT_HANDLED;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static cb_ret_t
+menubar_try_exec_menu (WMenuBar * menubar, int hotkey)
+{
+    menu_t *menu;
+    GList *i;
+
+    menu = g_list_nth_data (menubar->menu, menubar->selected);
+
+    for (i = menu->entries; i != NULL; i = g_list_next (i))
+    {
+        const menu_entry_t *entry = MENUENTRY (i->data);
+
+        if (entry != NULL && entry->text.hotkey != NULL
+            && hotkey == g_ascii_tolower (entry->text.hotkey[0]))
+        {
+            menu->selected = g_list_position (menu->entries, i);
+            menubar_execute (menubar);
+            return MSG_HANDLED;
+        }
+    }
+
+    return MSG_NOT_HANDLED;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static cb_ret_t
+menubar_execute_cmd (WMenuBar * menubar, long command)
+{
+    cb_ret_t ret = MSG_HANDLED;
+
+    switch (command)
+    {
+    case CK_Help:
+        {
+            ev_help_t event_data = { NULL, NULL };
+
+            if (menubar->is_dropped)
+                event_data.node =
+                    MENU (g_list_nth_data (menubar->menu, menubar->selected))->help_node;
+            else
+                event_data.node = "[Menu Bar]";
+
+            mc_event_raise (MCEVENT_GROUP_CORE, "help", &event_data);
+            menubar_draw (menubar);
+        }
+        break;
+
+    case CK_Left:
+        menubar_left (menubar);
+        break;
+    case CK_Right:
+        menubar_right (menubar);
+        break;
+    case CK_Up:
+        if (menubar->is_dropped)
+            menubar_up (menubar);
+        break;
+    case CK_Down:
+        if (menubar->is_dropped)
+            menubar_down (menubar);
+        else
+            menubar_drop (menubar, menubar->selected);
+        break;
+    case CK_Home:
+        menubar_first (menubar);
+        break;
+    case CK_End:
+        menubar_last (menubar);
+        break;
+
+    case CK_Enter:
+        if (menubar->is_dropped)
+            menubar_execute (menubar);
+        else
+            menubar_drop (menubar, menubar->selected);
+        break;
+    case CK_Quit:
+        menubar_finish (menubar);
+        break;
+
+    default:
+        ret = MSG_NOT_HANDLED;
+        break;
+    }
+
+    return ret;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+menubar_handle_key (WMenuBar * menubar, int key)
+{
+    long cmd;
+    cb_ret_t ret = MSG_NOT_HANDLED;
+
+    cmd = widget_lookup_key (WIDGET (menubar), key);
+
+    if (cmd != CK_IgnoreKey)
+        ret = menubar_execute_cmd (menubar, cmd);
+
+    if (ret != MSG_HANDLED)
+    {
+        if (menubar->is_dropped)
+            ret = menubar_try_exec_menu (menubar, key);
+        else
+            ret = menubar_try_drop_menu (menubar, key);
+    }
+
+    return ret;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static gboolean
+menubar_refresh (WMenuBar * menubar)
+{
+    Widget *w = WIDGET (menubar);
+
+    if (!widget_get_state (w, WST_FOCUSED))
+        return FALSE;
+
+    /* Trick to get all the mouse events */
+    w->rect.lines = LINES;
+
+    /* Trick to get all of the hotkeys */
+    widget_want_hotkey (w, TRUE);
+    return TRUE;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static inline void
+menubar_free_menu (WMenuBar * menubar)
+{
+    g_clear_list (&menubar->menu, (GDestroyNotify) destroy_menu);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static cb_ret_t
+menubar_callback (Widget * w, Widget * sender, widget_msg_t msg, int parm, void *data)
+{
+    WMenuBar *menubar = MENUBAR (w);
+
+    switch (msg)
+    {
+        /* We do not want the focus unless we have been activated */
+    case MSG_FOCUS:
+        if (menubar_refresh (menubar))
+        {
+            menubar_draw (menubar);
+            return MSG_HANDLED;
+        }
+        return MSG_NOT_HANDLED;
+
+    case MSG_UNFOCUS:
+        return widget_get_state (w, WST_FOCUSED) ? MSG_NOT_HANDLED : MSG_HANDLED;
+
+        /* We don't want the buttonbar to activate while using the menubar */
+    case MSG_HOTKEY:
+    case MSG_KEY:
+        if (widget_get_state (w, WST_FOCUSED))
+        {
+            menubar_handle_key (menubar, parm);
+            return MSG_HANDLED;
+        }
+        return MSG_NOT_HANDLED;
+
+    case MSG_CURSOR:
+        /* Put the cursor in a suitable place */
+        return MSG_NOT_HANDLED;
+
+    case MSG_DRAW:
+        if (widget_get_state (w, WST_VISIBLE) || menubar_refresh (menubar))
+            menubar_draw (menubar);
+        return MSG_HANDLED;
+
+    case MSG_RESIZE:
+        /* try show menu after screen resize */
+        widget_default_callback (w, NULL, MSG_RESIZE, 0, data);
+        menubar_refresh (menubar);
+        return MSG_HANDLED;
+
+    case MSG_DESTROY:
+        menubar_free_menu (menubar);
+        return MSG_HANDLED;
+
+    default:
+        return widget_default_callback (w, sender, msg, parm, data);
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static unsigned int
+menubar_get_menu_by_x_coord (const WMenuBar * menubar, int x)
+{
+    unsigned int i;
+    GList *menu;
+
+    for (i = 0, menu = menubar->menu;
+         menu != NULL && x >= MENU (menu->data)->start_x; i++, menu = g_list_next (menu))
+        ;
+
+    /* Don't set the invalid value -1 */
+    if (i != 0)
+        i--;
+
+    return i;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static gboolean
+menubar_mouse_on_menu (const WMenuBar * menubar, int y, int x)
+{
+    const WRect *w = &CONST_WIDGET (menubar)->rect;
+    menu_t *menu;
+    int left_x, right_x, bottom_y;
+
+    if (!menubar->is_dropped)
+        return FALSE;
+
+    menu = MENU (g_list_nth_data (menubar->menu, menubar->selected));
+    left_x = menu->start_x;
+    right_x = left_x + menu->max_entry_len + 3;
+    if (right_x > w->cols)
+    {
+        left_x = w->cols - (menu->max_entry_len + 3);
+        right_x = w->cols;
+    }
+
+    bottom_y = g_list_length (menu->entries) + 2;       /* skip bar and top frame */
+
+    return (x >= left_x && x < right_x && y > 1 && y < bottom_y);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+menubar_change_selected_item (WMenuBar * menubar, int y)
+{
+    menu_t *menu;
+    menu_entry_t *entry;
+
+    y -= 2;                     /* skip bar and top frame */
+    menu = MENU (g_list_nth_data (menubar->menu, menubar->selected));
+    entry = MENUENTRY (g_list_nth_data (menu->entries, y));
+
+    if (entry != NULL && entry->command != CK_IgnoreKey)
+    {
+        menubar_paint_idx (menubar, menu->selected, MENU_ENTRY_COLOR);
+        menu->selected = y;
+        menubar_paint_idx (menubar, menu->selected, MENU_SELECTED_COLOR);
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+menubar_mouse_callback (Widget * w, mouse_msg_t msg, mouse_event_t * event)
+{
+    static gboolean was_drag = FALSE;
+
+    WMenuBar *menubar = MENUBAR (w);
+    gboolean mouse_on_drop;
+
+    mouse_on_drop = menubar_mouse_on_menu (menubar, event->y, event->x);
+
+    switch (msg)
+    {
+    case MSG_MOUSE_DOWN:
+        was_drag = FALSE;
+
+        if (event->y == 0)
+        {
+            /* events on menubar */
+            unsigned int selected;
+
+            selected = menubar_get_menu_by_x_coord (menubar, event->x);
+            menubar_activate (menubar, TRUE, selected);
+            menubar_remove (menubar);   /* if already shown */
+            menubar_drop (menubar, selected);
+        }
+        else if (mouse_on_drop)
+            menubar_change_selected_item (menubar, event->y);
+        else
+        {
+            /* mouse click outside menubar or dropdown -- close menu */
+            menubar_finish (menubar);
+
+            /*
+             * @FIXME.
+             *
+             * Unless we clear the 'capture' flag, we'll receive MSG_MOUSE_DRAG
+             * events belonging to this click (in case the user drags the mouse,
+             * of course).
+             *
+             * For the time being, we mark this with FIXME as this flag should
+             * preferably be regarded as "implementation detail" and not be
+             * touched by us. We should think of some other way of communicating
+             * this to the system.
+             */
+            w->mouse.capture = FALSE;
+        }
+        break;
+
+    case MSG_MOUSE_UP:
+        if (was_drag && mouse_on_drop)
+            menubar_execute (menubar);
+        was_drag = FALSE;
+        break;
+
+    case MSG_MOUSE_CLICK:
+        was_drag = FALSE;
+
+        if ((event->buttons & GPM_B_MIDDLE) != 0 && event->y > 0 && menubar->is_dropped)
+        {
+            /* middle click -- everywhere */
+            menubar_execute (menubar);
+        }
+        else if (mouse_on_drop)
+            menubar_execute (menubar);
+        else if (event->y > 0)
+            /* releasing the mouse button outside the menu -- close menu */
+            menubar_finish (menubar);
+        break;
+
+    case MSG_MOUSE_DRAG:
+        if (event->y == 0)
+        {
+            menubar_remove (menubar);
+            menubar_drop (menubar, menubar_get_menu_by_x_coord (menubar, event->x));
+        }
+        else if (mouse_on_drop)
+            menubar_change_selected_item (menubar, event->y);
+
+        was_drag = TRUE;
+        break;
+
+    case MSG_MOUSE_SCROLL_UP:
+    case MSG_MOUSE_SCROLL_DOWN:
+        was_drag = FALSE;
+
+        if (widget_get_state (w, WST_FOCUSED))
+        {
+            if (event->y == 0)
+            {
+                /* menubar: left/right */
+                if (msg == MSG_MOUSE_SCROLL_UP)
+                    menubar_left (menubar);
+                else
+                    menubar_right (menubar);
+            }
+            else if (mouse_on_drop)
+            {
+                /* drop-down menu: up/down */
+                if (msg == MSG_MOUSE_SCROLL_UP)
+                    menubar_up (menubar);
+                else
+                    menubar_down (menubar);
+            }
+        }
+        break;
+
+    default:
+        was_drag = FALSE;
+        break;
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/*** public functions ****************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+menu_entry_t *
+menu_entry_create (const char *name, long command)
+{
+    menu_entry_t *entry;
+
+    entry = g_new (menu_entry_t, 1);
+    entry->first_letter = ' ';
+    entry->text = hotkey_new (name);
+    entry->command = command;
+    entry->shortcut = NULL;
+
+    return entry;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+menu_entry_free (menu_entry_t * entry)
+{
+    if (entry != NULL)
+    {
+        hotkey_free (entry->text);
+        g_free (entry->shortcut);
+        g_free (entry);
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+menu_t *
+create_menu (const char *name, GList * entries, const char *help_node)
+{
+    menu_t *menu;
+
+    menu = g_new (menu_t, 1);
+    menu->start_x = 0;
+    menu->text = hotkey_new (name);
+    menu->entries = entries;
+    menu->max_entry_len = 1;
+    menu->max_hotkey_len = 0;
+    menu->selected = 0;
+    menu->help_node = g_strdup (help_node);
+
+    return menu;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+menu_set_name (menu_t * menu, const char *name)
+{
+    hotkey_free (menu->text);
+    menu->text = hotkey_new (name);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+destroy_menu (menu_t * menu)
+{
+    hotkey_free (menu->text);
+    g_list_free_full (menu->entries, (GDestroyNotify) menu_entry_free);
+    g_free (menu->help_node);
+    g_free (menu);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+WMenuBar *
+menubar_new (GList * menu)
+{
+    WRect r = { 0, 0, 1, COLS };
+    WMenuBar *menubar;
+    Widget *w;
+
+    menubar = g_new0 (WMenuBar, 1);
+    w = WIDGET (menubar);
+    widget_init (w, &r, menubar_callback, menubar_mouse_callback);
+    w->pos_flags = WPOS_KEEP_HORZ | WPOS_KEEP_TOP;
+    /* initially, menubar is not selectable */
+    widget_set_options (w, WOP_SELECTABLE, FALSE);
+    w->options |= WOP_TOP_SELECT;
+    w->keymap = menu_map;
+    menubar_set_menu (menubar, menu);
+
+    return menubar;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+menubar_set_menu (WMenuBar * menubar, GList * menu)
+{
+    /* delete previous menu */
+    menubar_free_menu (menubar);
+    /* add new menu */
+    menubar->is_dropped = FALSE;
+    menubar->menu = menu;
+    menubar->selected = 0;
+    menubar_arrange (menubar);
+    widget_set_state (WIDGET (menubar), WST_FOCUSED, FALSE);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+menubar_add_menu (WMenuBar * menubar, menu_t * menu)
+{
+    if (menu != NULL)
+    {
+        menu_arrange (menu, DIALOG (WIDGET (menubar)->owner)->get_shortcut);
+        menubar->menu = g_list_append (menubar->menu, menu);
+    }
+
+    menubar_arrange (menubar);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/**
+ * Properly space menubar items. Should be called when menubar is created
+ * and also when widget width is changed (i.e. upon xterm resize).
+ */
+
+void
+menubar_arrange (WMenuBar * menubar)
+{
+    int start_x = 1;
+    GList *i;
+    int gap;
+
+    if (menubar->menu == NULL)
+        return;
+
+    gap = WIDGET (menubar)->rect.cols - 2;
+
+    /* First, calculate gap between items... */
+    for (i = menubar->menu; i != NULL; i = g_list_next (i))
+    {
+        menu_t *menu = MENU (i->data);
+
+        /* preserve length here, to be used below */
+        menu->start_x = hotkey_width (menu->text) + 2;
+        gap -= menu->start_x;
+    }
+
+    if (g_list_next (menubar->menu) == NULL)
+        gap = 1;
+    else
+        gap /= (g_list_length (menubar->menu) - 1);
+
+    if (gap <= 0)
+    {
+        /* We are out of luck - window is too narrow... */
+        gap = 1;
+    }
+    else if (gap >= 3)
+        gap = 3;
+
+    /* ...and now fix start positions of menubar items */
+    for (i = menubar->menu; i != NULL; i = g_list_next (i))
+    {
+        menu_t *menu = MENU (i->data);
+        int len = menu->start_x;
+
+        menu->start_x = start_x;
+        start_x += len + gap;
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/** Find MenuBar widget in the dialog */
+
+WMenuBar *
+find_menubar (const WDialog * h)
+{
+    return MENUBAR (widget_find_by_type (CONST_WIDGET (h), menubar_callback));
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+/**
+ * Activate menu bar.
+ *
+ * @param menubar menu bar object
+ * @param dropped whether dropdown menus should be drooped or not
+ * @which number of active dropdown menu
+ */
+void
+menubar_activate (WMenuBar * menubar, gboolean dropped, int which)
+{
+    Widget *w = WIDGET (menubar);
+
+    widget_show (w);
+
+    if (!widget_get_state (w, WST_FOCUSED))
+    {
+        widget_set_options (w, WOP_SELECTABLE, TRUE);
+
+        menubar->is_dropped = dropped;
+        if (which >= 0)
+            menubar->selected = (guint) which;
+
+        menubar->previous_widget = group_get_current_widget_id (w->owner);
+
+        /* Bring it to the top so it receives all mouse events before any other widget.
+         * See also comment in menubar_finish(). */
+        widget_select (w);
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */