enlightenment/src/modules/fileman/e_fwin_nav.c

#include "e_mod_main.h"

typedef struct _Instance Instance;

typedef struct Nav_Item
{
   EINA_INLIST;
   Instance *inst;
   Evas_Object *o;
   Eina_List *handlers;
   Eio_Monitor *monitor;
   const char *path;
} Nav_Item;

struct _Instance
{
   E_Gadcon_Client    *gcc;

   E_Toolbar          *tbar;

   E_Drop_Handler    *dnd_handler;
   Evas_Object *dnd_obj;
   char *dnd_path;

   Evas_Object        *o_base, *o_box, *o_fm, *o_scroll;

   // buttons
   Nav_Item          *sel_ni;
   Eina_Inlist       *l_buttons;
   Eina_List          *history, *current;
   int                 ignore_dir;

   const char         *theme;

   Ecore_Idle_Enterer *idler;
};

/* local function protos */
static E_Gadcon_Client *_gc_init(E_Gadcon *gc, const char *name, const char *id, const char *style);
static void             _gc_shutdown(E_Gadcon_Client *gcc);
static void             _gc_orient(E_Gadcon_Client *gcc, E_Gadcon_Orient orient);
static const char      *_gc_label(const E_Gadcon_Client_Class *client_class);
static Evas_Object     *_gc_icon(const E_Gadcon_Client_Class *client_class, Evas *evas);
static const char      *_gc_id_new(const E_Gadcon_Client_Class *client_class);
static void             _cb_mouse_down(void *data, Evas *e, Evas_Object *obj, void *event_info);
static void             _cb_key_down(void *data, Evas *e, Evas_Object *obj, void *event_info);
static void             _cb_back_click(void *data, Evas_Object *obj, const char *emission, const char *source);
static void             _cb_forward_click(void *data, Evas_Object *obj, const char *emission, const char *source);
static void             _cb_up_click(void *data, Evas_Object *obj, const char *emission, const char *source);
static void             _cb_refresh_click(void *data, Evas_Object *obj, const char *emission, const char *source);
static void             _cb_favorites_click(void *data, Evas_Object *obj, const char *emission, const char *source);
static void             _cb_changed(void *data, Evas_Object *obj, void *event_info);
static void             _cb_dir_changed(void *data, Evas_Object *obj, void *event_info);
static void             _cb_button_click(void *data, Evas_Object *obj, const char *emission, const char *source);
static void             _cb_scroll_resize(void *data, Evas *e __UNUSED__, Evas_Object *obj __UNUSED__, void *event_info);
static void             _box_button_append(Instance *inst, const char *label, Edje_Signal_Cb func);
static void             _box_button_free(Nav_Item *ni);
static void _cb_fm_mouse_down(void *data, Evas *e EINA_UNUSED, Evas_Object *obj EINA_UNUSED, void *event_info);


static Eina_List *instances = NULL;
static const char *_nav_mod_dir = NULL;

/* local gadcon functions */
static const E_Gadcon_Client_Class _gc_class =
{
   GADCON_CLIENT_CLASS_VERSION, "efm_navigation",
   {
      _gc_init, _gc_shutdown, _gc_orient, _gc_label, _gc_icon, _gc_id_new, NULL,
      e_gadcon_site_is_efm_toolbar
   }, E_GADCON_CLIENT_STYLE_PLAIN
};

Eina_Bool
e_fwin_nav_init(void)
{
   e_gadcon_provider_register(&_gc_class);
   return EINA_TRUE;
}

Eina_Bool
e_fwin_nav_shutdown(void)
{
   e_gadcon_provider_unregister(&_gc_class);
   return EINA_TRUE;
}

static Eina_Bool
_event_deleted(Nav_Item *ni, int type, void *e)
{
   Eio_Monitor_Event *ev = e;
   const char *dir;

   if (type == EIO_MONITOR_ERROR)
     {
        //donteven.jpg
        eio_monitor_del(ni->monitor);
        ni->monitor = eio_monitor_stringshared_add(ni->path);
        return ECORE_CALLBACK_RENEW;
     }
   else
     dir = ev->filename;
   
   if (ni->path != dir) return ECORE_CALLBACK_RENEW;
   if (ni == ni->inst->sel_ni)
     {
        Nav_Item *nip;

        if (EINA_INLIST_GET(ni)->prev)
          {
             nip = (Nav_Item*)EINA_INLIST_GET(ni)->prev;
             _cb_button_click(ni->inst, nip->o, NULL, NULL);
          }
     }
   while (EINA_INLIST_GET(ni)->next)
     _box_button_free((Nav_Item*)EINA_INLIST_GET(ni)->next);
   _box_button_free(ni);
   return ECORE_CALLBACK_RENEW;
}

static void
_cb_resize(void *data, Evas *e __UNUSED__, Evas_Object *obj __UNUSED__, void *event_info __UNUSED__)
{
   Instance *inst;
   int w, h;

   inst = data;
   evas_object_geometry_get(inst->gcc->gadcon->o_container, 0, 0, &w, &h);
   e_gadcon_client_min_size_set(inst->gcc, w, h);
   e_gadcon_client_aspect_set(inst->gcc, w, h);
}

static Eina_Bool
_cb_initial_dir(void *data)
{
   Instance *inst = data;

   _cb_dir_changed(inst, NULL, NULL);

   return ECORE_CALLBACK_CANCEL;
}

static void
_box_button_cb_dnd_enter(void *data __UNUSED__, const char *type, void *event)
{
   E_Event_Dnd_Enter *ev = event;

   if (strcmp(type, "text/uri-list") && strcmp(type, "XdndDirectSave0")) return;
   e_drop_handler_action_set(ev->action);
}

static void
_box_button_cb_dnd_leave(void *data, const char *type __UNUSED__, void *event __UNUSED__)
{
   Instance *inst = data;

   if (!inst->dnd_obj) return;
   edje_object_signal_emit(inst->dnd_obj, "e,state,default", "e");
   inst->dnd_obj = NULL;
   if (inst->sel_ni) edje_object_signal_emit(inst->sel_ni->o, "e,state,selected", "e");
}

static void
_box_button_cb_dnd_move(void *data, const char *type, void *event)
{
   Instance *inst = data;
   Evas_Object *obj;
   E_Event_Dnd_Move *ev = event;

   if (strcmp(type, "text/uri-list") && strcmp(type, "XdndDirectSave0")) return;
   obj = e_box_item_at_xy_get(inst->o_box, ev->x, ev->y);
   if (!obj)
     {
        _box_button_cb_dnd_leave(inst, type, NULL);
        return;
     }
   e_drop_handler_action_set(ev->action);
   if (obj == inst->dnd_obj) return;
   if (inst->sel_ni)
     edje_object_signal_emit(inst->sel_ni->o, "e,state,default", "e");
   if (inst->dnd_obj)
     edje_object_signal_emit(inst->dnd_obj, "e,state,default", "e");
   inst->dnd_obj = obj;
   edje_object_signal_emit(inst->dnd_obj, "e,state,selected", "e");
}

static void
_box_button_cb_dnd_selection_notify(void *data, const char *type, void *event)
{
   Instance *inst = data;
   E_Event_Dnd_Drop *ev = event;
   char buf[PATH_MAX], *args = NULL;
   Eina_Bool memerr = EINA_FALSE, link_drop;
   Eina_Stringshare *fp;
   Eina_List *files, *l, *ll;
   size_t size = 0, length = 0;

   if ((strcmp(type, "text/uri-list") && strcmp(type, "XdndDirectSave0")) || (!inst->dnd_obj))
     goto out;
   e_user_dir_concat_static(buf, "fileman/favorites");
   link_drop = !strcmp(buf, inst->dnd_path);
   files = e_fm2_uri_path_list_get(ev->data);
   EINA_LIST_FOREACH_SAFE(files, l, ll, fp)
     {
        if (memerr) continue;
        args = e_util_string_append_quoted(args, &size, &length, fp);
        if (!args) memerr = EINA_TRUE;
        if (memerr) continue;
        args = e_util_string_append_char(args, &size, &length, ' ');
        if (!args) memerr = EINA_TRUE;
        eina_stringshare_del(fp);
        files = eina_list_remove_list(files, l);
     }
   E_FREE_LIST(files, eina_stringshare_del);
   if (!args) goto out;
   args = e_util_string_append_quoted(args, &size, &length, inst->dnd_path);
   if (!args) goto out;
   if (link_drop || (e_drop_handler_action_get() == ECORE_X_ATOM_XDND_ACTION_LINK))
     e_fm2_client_file_symlink(inst->o_fm, args);
   else if (e_drop_handler_action_get() == ECORE_X_ATOM_XDND_ACTION_COPY)
     e_fm2_client_file_copy(inst->o_fm, args);
   else if (e_drop_handler_action_get() == ECORE_X_ATOM_XDND_ACTION_MOVE)
     e_fm2_client_file_move(inst->o_fm, args);
   else if (e_drop_handler_action_get() == ECORE_X_ATOM_XDND_ACTION_ASK)
     e_fm2_drop_menu(inst->o_fm, args);
   free(args);
out:
   E_FREE(inst->dnd_path);
   _box_button_cb_dnd_leave(inst, type, NULL);
}

static Eina_Bool
_box_button_cb_dnd_drop(void *data, const char *type __UNUSED__)
{
   Instance *inst = data;
   Nav_Item *ni;
   Eina_Bool allow;
   char path[PATH_MAX] = {0};

   if (!inst->dnd_obj) return EINA_FALSE;

   EINA_INLIST_FOREACH(inst->l_buttons, ni)
     {
        strcat(path, edje_object_part_text_get(ni->o, "e.text.label"));
        if (ni->o == inst->dnd_obj) break;
        if (path[1]) strcat(path, "/");
     }
   allow = ecore_file_can_write(path);
   if (allow)
     {
        e_drop_xds_update(allow, path);
        inst->dnd_path = strdup(path);
     }
   return allow;
}

static void
_gc_moveresize(void *data, Evas *e __UNUSED__, Evas_Object *obj __UNUSED__, void *event_info __UNUSED__)
{
   Instance *inst = data;
   int x, y, w, h;

   e_gadcon_client_viewport_geometry_get(inst->gcc, &x, &y, &w, &h);
   e_drop_handler_geometry_set(inst->dnd_handler, x, y, w, h);
}

static E_Gadcon_Client *
_gc_init(E_Gadcon *gc, const char *name, const char *id, const char *style)
{
   Instance *inst = NULL;
   char buf[PATH_MAX];
   int x, y, w, h;
   E_Toolbar *tbar;
   Eina_List *l;
   Evas_Object *o_fm;
   const char *drop[] = { "text/uri-list", "XdndDirectSave0"};

   tbar = e_gadcon_toolbar_get(gc);
   if (!tbar) return NULL;

   o_fm = e_toolbar_fm2_get(tbar);
   if (!o_fm) return NULL;

   /* make sure only one instance exists in toolbar */
   EINA_LIST_FOREACH(instances, l, inst)
     if (inst->tbar == tbar) return NULL;

   inst = E_NEW(Instance, 1);
   if (!inst) return NULL;

   inst->tbar = tbar;
   inst->o_fm = o_fm;

   evas_object_event_callback_add(o_fm, EVAS_CALLBACK_MOUSE_DOWN, _cb_fm_mouse_down, inst);

   snprintf(buf, sizeof(buf), "%s/e-module-efm_nav.edj", _nav_mod_dir);
   inst->theme = eina_stringshare_add(buf);

   inst->o_base = edje_object_add(gc->evas);
   e_theme_edje_object_set(inst->o_base, "base/theme/modules/efm_navigation",
                           "modules/efm_navigation/main");

   edje_object_signal_callback_add(inst->o_base, "e,action,back,click", "",
                                   _cb_back_click, inst);
   edje_object_signal_callback_add(inst->o_base, "e,action,forward,click", "",
                                   _cb_forward_click, inst);
   edje_object_signal_callback_add(inst->o_base, "e,action,up,click", "",
                                   _cb_up_click, inst);
   edje_object_signal_callback_add(inst->o_base, "e,action,refresh,click", "",
                                   _cb_refresh_click, inst);
   edje_object_signal_callback_add(inst->o_base, "e,action,favorites,click", "",
                                   _cb_favorites_click, inst);
   evas_object_show(inst->o_base);

   inst->o_scroll = e_scrollframe_add(gc->evas);
   evas_object_repeat_events_set(inst->o_scroll, EINA_TRUE);
   e_scrollframe_custom_theme_set(inst->o_scroll,
                                  "base/theme/modules/efm_navigation",
                                  "modules/efm_navigation/pathbar_scrollframe");

   e_scrollframe_single_dir_set(inst->o_scroll, 1);
   e_scrollframe_policy_set(inst->o_scroll, E_SCROLLFRAME_POLICY_AUTO,
                            E_SCROLLFRAME_POLICY_OFF);
   e_scrollframe_thumbscroll_force(inst->o_scroll, 1);
   evas_object_show(inst->o_scroll);

   inst->o_box = e_box_add(gc->evas);
   evas_object_repeat_events_set(inst->o_box, EINA_TRUE);
   e_box_orientation_set(inst->o_box, 1);
   e_box_homogenous_set(inst->o_box, 0);
   e_scrollframe_child_set(inst->o_scroll, inst->o_box);
   evas_object_show(inst->o_box);

   evas_object_event_callback_add(inst->o_scroll, EVAS_CALLBACK_RESIZE,
                                  _cb_scroll_resize, inst);

   edje_object_part_swallow(inst->o_base, "e.swallow.pathbar", inst->o_scroll);

   inst->gcc = e_gadcon_client_new(gc, name, id, style, inst->o_base);
   inst->gcc->data = inst;

   /* add the hooks to get signals from efm */
   evas_object_event_callback_add(inst->o_fm, EVAS_CALLBACK_KEY_DOWN,
                                  _cb_key_down, inst);
   evas_object_smart_callback_add(inst->o_fm, "changed",
                                  _cb_changed, inst);
   evas_object_smart_callback_add(inst->o_fm, "dir_changed",
                                  _cb_dir_changed, inst);

   evas_object_event_callback_add(inst->o_base,
                                  EVAS_CALLBACK_MOUSE_DOWN,
                                  _cb_mouse_down, inst);
   if (!inst->gcc->resizable)
     {
        evas_object_geometry_get(inst->gcc->gadcon->o_container, 0, 0, &w, &h);
        e_gadcon_client_min_size_set(inst->gcc, w, h);
        e_gadcon_client_aspect_set(inst->gcc, w, h);
        evas_object_event_callback_add(inst->gcc->gadcon->o_container,
                                       EVAS_CALLBACK_RESIZE,
                                       _cb_resize, inst);
     }

   edje_object_signal_emit(inst->o_base, "e,state,back,disabled", "e");
   edje_object_signal_emit(inst->o_base, "e,state,forward,disabled", "e");
   edje_object_message_signal_process(inst->o_base);

   evas_object_geometry_get(inst->o_scroll, &x, &y, &w, &h);
   inst->dnd_handler = e_drop_handler_add(E_OBJECT(inst->gcc),
                                         inst,
                                         _box_button_cb_dnd_enter,
                                         _box_button_cb_dnd_move,
                                         _box_button_cb_dnd_leave,
                                         _box_button_cb_dnd_selection_notify,
                                         drop, 2,
                                         x, y, w, h);
   evas_object_event_callback_add(inst->o_scroll, EVAS_CALLBACK_MOVE, _gc_moveresize, inst);
   evas_object_event_callback_add(inst->o_scroll, EVAS_CALLBACK_RESIZE, _gc_moveresize, inst);
   e_drop_handler_responsive_set(inst->dnd_handler);
   e_drop_handler_xds_set(inst->dnd_handler, _box_button_cb_dnd_drop);

   instances = eina_list_append(instances, inst);

   inst->idler = ecore_idle_enterer_add(_cb_initial_dir, inst);

   return inst->gcc;
}

static void
_gc_shutdown(E_Gadcon_Client *gcc)
{
   Instance *inst = NULL;
   const char *s;

   inst = gcc->data;
   if (!inst) return;
   instances = eina_list_remove(instances, inst);

   evas_object_event_callback_del_full(inst->o_fm,
                                       EVAS_CALLBACK_MOUSE_DOWN,
                                       _cb_fm_mouse_down, inst);
   evas_object_event_callback_del_full(inst->o_fm,
                                       EVAS_CALLBACK_KEY_DOWN,
                                       _cb_key_down, inst);

   evas_object_smart_callback_del(inst->o_fm, "changed", _cb_changed);
   evas_object_smart_callback_del(inst->o_fm, "dir_changed", _cb_dir_changed);

   EINA_LIST_FREE(inst->history, s)
     eina_stringshare_del(s);

   if (gcc->gadcon->o_container)
     evas_object_event_callback_del_full(gcc->gadcon->o_container,
                                         EVAS_CALLBACK_RESIZE,
                                         _cb_resize, inst);

   while (inst->l_buttons)
     _box_button_free((Nav_Item*)inst->l_buttons);

   if (inst->o_base) evas_object_del(inst->o_base);
   if (inst->o_box) evas_object_del(inst->o_box);
   if (inst->o_scroll) evas_object_del(inst->o_scroll);
   e_drop_handler_del(inst->dnd_handler);
   E_FREE(inst->dnd_path);

   eina_stringshare_del(inst->theme);

   E_FREE(inst);
}

static void
_gc_orient(E_Gadcon_Client *gcc __UNUSED__, E_Gadcon_Orient orient)
{
   /* Instance *inst; */

   /* inst = gcc->data; */
   switch (orient)
     {
      case E_GADCON_ORIENT_TOP:
      case E_GADCON_ORIENT_BOTTOM:
        /* e_gadcon_client_aspect_set(gcc, 16 * 4, 16); */
        break;

      case E_GADCON_ORIENT_LEFT:
      case E_GADCON_ORIENT_RIGHT:
        /* e_gadcon_client_aspect_set(gcc, 16, 16 * 4); */
        break;

      default:
        break;
     }
   /* e_gadcon_client_min_size_set(gcc, 16, 16); */
}

static const char *
_gc_label(const E_Gadcon_Client_Class *client_class __UNUSED__)
{
   return _("EFM Navigation");
}

static Evas_Object *
_gc_icon(const E_Gadcon_Client_Class *client_class __UNUSED__, Evas *evas)
{
   return e_util_icon_theme_icon_add("system-file-manager", 48, evas);
}

static const char *
_gc_id_new(const E_Gadcon_Client_Class *client_class __UNUSED__)
{
   static char buf[4096];

   snprintf(buf, sizeof(buf), "%s.%d", _gc_class.name,
            (eina_list_count(instances) + 1));
   return buf;
}

/* local functions */
static void
_cb_key_down(void *data, Evas *e __UNUSED__, Evas_Object *obj, void *event_info)
{
   Instance *inst;
   Evas_Event_Key_Down *ev;

   inst = data;
   ev = event_info;
   if (evas_key_modifier_is_set(ev->modifiers, "Alt"))
     {
        if (!strcmp(ev->key, "Left"))
          _cb_back_click(inst, obj, "e,action,click", "e");
        else if (!strcmp(ev->key, "Right"))
          _cb_forward_click(inst, obj, "e,action,click", "e");
        else if (!strcmp(ev->key, "Up"))
          _cb_up_click(inst, obj, "e,action,click", "e");
     }
   else if (evas_key_modifier_is_set(ev->modifiers, "Control"))
     {
        if (!strcmp(ev->key, "r"))
          _cb_refresh_click(inst, obj, "e,action,click", "e");
     }
}

static void
_cb_mouse_down(void *data, Evas *e __UNUSED__, Evas_Object *obj __UNUSED__, void *event_info)
{
   Instance *inst;
   Evas_Event_Mouse_Down *ev;
   E_Menu *m;
   E_Zone *zone;
   int x, y;

   inst = data;
   ev = event_info;
   if ((ev->button != 3) || (inst->gcc->menu)) return;
   zone = e_util_zone_current_get(e_manager_current_get());

   m = e_menu_new();
   m = e_gadcon_client_util_menu_items_append(inst->gcc, m, 0);
   ecore_x_pointer_xy_get(zone->comp->win, &x, &y);
   e_menu_activate_mouse(m, zone, x, y, 1, 1,
                         E_MENU_POP_DIRECTION_AUTO, ev->timestamp);
   evas_event_feed_mouse_up(inst->gcc->gadcon->evas, ev->button,
                            EVAS_BUTTON_NONE, ev->timestamp, NULL);
}

static void
_cb_back_click(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
{
   Instance *inst;

   inst = data;

   if ((!inst->current) || (inst->current == eina_list_last(inst->history))) return;
   inst->current = eina_list_next(inst->current);

   inst->ignore_dir = 1;
   e_fm2_path_set(inst->o_fm, eina_list_data_get(inst->current), "/");
}

static void
_cb_forward_click(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
{
   Instance *inst;

   inst = data;

   if ((!inst->current) || (inst->current == inst->history)) return;
   inst->current = eina_list_prev(inst->current);

   inst->ignore_dir = 1;
   e_fm2_path_set(inst->o_fm, eina_list_data_get(inst->current), "/");
}

static void
_cb_refresh_click(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
{
   Instance *inst = data;

   // Don't destroy forward history when refreshing
   inst->ignore_dir = 1;
   e_fm2_refresh(inst->o_fm);
}

static void
_cb_up_click(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
{
   Instance *inst;
   char *p, *t;

   inst = data;

   t = strdup(e_fm2_real_path_get(inst->o_fm));
   p = strrchr(t, '/');
   if (p)
     {
        *p = 0;
        p = t;
        if (p[0] == 0) p = "/";
        e_fm2_path_set(inst->o_fm, NULL, p);
     }
   else
     {
        edje_object_signal_emit(inst->o_base, "e,state,up,disabled", "e");
     }

   free(t);
}

static void
_cb_favorites_click(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
{
   Instance *inst;

   inst = data;

   e_fm2_path_set(inst->o_fm, "favorites", "/");
}

static void
_cb_fm_mouse_down(void *data, Evas *e EINA_UNUSED, Evas_Object *obj EINA_UNUSED, void *event_info)
{
   Instance *inst = data;
   Evas_Event_Mouse_Down *ev = event_info;

   if (ev->button == 9)
     _cb_forward_click(inst, NULL, NULL, NULL);
   else if (ev->button == 8)
     _cb_back_click(inst, NULL, NULL, NULL);
}

static void
_cb_changed(void *data, Evas_Object *obj __UNUSED__, void *event_info)
{
   Instance *inst;

   inst = data;
   inst->tbar = event_info;
}

static void
_cb_button_click(void *data, Evas_Object *obj, const char *emission __UNUSED__, const char *source __UNUSED__)
{
   Instance *inst = data;
   Nav_Item *ni;
   char path[PATH_MAX] = "";

   EINA_INLIST_FOREACH(inst->l_buttons, ni)
     {
        strcat(path, edje_object_part_text_get(ni->o, "e.text.label"));
        if (ni->o == obj) break;
        strcat(path, "/");
     }
   e_fm2_path_set(inst->o_fm, "/", path);
}

static void
_cb_scroll_resize(void *data, Evas *e __UNUSED__, Evas_Object *obj __UNUSED__, void *event_info __UNUSED__)
{
   Instance *inst = data;
   Evas_Coord mw = 0, mh = 0;

   evas_object_geometry_get(inst->o_box, NULL, NULL, &mw, NULL);
   evas_object_geometry_get(inst->o_scroll, NULL, NULL, NULL, &mh);
   evas_object_resize(inst->o_box, mw, mh);
}

static void
_box_button_free(Nav_Item *ni)
{
   if (!ni) return;
   ni->inst->l_buttons = eina_inlist_remove(ni->inst->l_buttons, EINA_INLIST_GET(ni));
   e_box_unpack(ni->o);
   evas_object_del(ni->o);
   E_FREE_LIST(ni->handlers, ecore_event_handler_del);
   eio_monitor_del(ni->monitor);
   eina_stringshare_del(ni->path);
   free(ni);
}

static void
_box_button_append(Instance *inst, const char *label, Edje_Signal_Cb func)
{
   Evas_Object *o;
   Evas_Coord mw = 0, mh = 0;
   char path[PATH_MAX] = {0};
   Nav_Item *ni, *nil;

   if (!inst || !label || !*label || !func)
     return;

   ni = E_NEW(Nav_Item, 1);

   o = edje_object_add(evas_object_evas_get(inst->o_box));

   e_theme_edje_object_set(o, "base/theme/modules/efm_navigation",
                           "modules/efm_navigation/pathbar_button");

   edje_object_signal_callback_add(o, "e,action,click", "", func, inst);
   edje_object_part_text_set(o, "e.text.label", label);
   edje_object_size_min_calc(o, &mw, &mh);
   e_box_pack_end(inst->o_box, o);
   evas_object_show(o);
   e_box_pack_options_set(o, 1, 0, 0, 0, 0.5, 0.5, mw, mh, 9999, 9999);
   e_box_size_min_get(inst->o_box, &mw, NULL);
   evas_object_geometry_get(inst->o_scroll, NULL, NULL, NULL, &mh);
   evas_object_resize(inst->o_box, mw, mh);
   ni->o = o;
   ni->inst = inst;
   inst->l_buttons = eina_inlist_append(inst->l_buttons, EINA_INLIST_GET(ni));
   EINA_INLIST_FOREACH(inst->l_buttons, nil)
     {
        strcat(path, edje_object_part_text_get(nil->o, "e.text.label"));
        if (path[1]) strcat(path, "/");
     }
   ni->path = eina_stringshare_add(path);
   ni->monitor = eio_monitor_stringshared_add(ni->path);
   E_LIST_HANDLER_APPEND(ni->handlers, EIO_MONITOR_SELF_DELETED, _event_deleted, ni);
   E_LIST_HANDLER_APPEND(ni->handlers, EIO_MONITOR_SELF_RENAME, _event_deleted, ni);
   E_LIST_HANDLER_APPEND(ni->handlers, EIO_MONITOR_ERROR, _event_deleted, ni);
}

static void
_cb_dir_changed(void *data, Evas_Object *obj __UNUSED__, void *event_info __UNUSED__)
{
   Instance *inst;
   const char *real_path;
   char *path, *dir, *p;
   Nav_Item *ni, *sel;
   Eina_Inlist *l;
   int mw, sw, changed = 0;

   inst = data;

   if (!(real_path = e_fm2_real_path_get(inst->o_fm))) return;

   /* update pathbar */
   if (!inst->l_buttons)
     _box_button_append(inst, "/", _cb_button_click);

   sel = (Nav_Item*)inst->l_buttons;
   l = EINA_INLIST_GET(sel)->next;
   p = path = ecore_file_realpath(real_path);

   while (p)
     {
        dir = strsep(&p, "/");

        if (!(*dir)) continue;

        if (l)
          {
             ni = EINA_INLIST_CONTAINER_GET(l, Nav_Item);
             if (strcmp(dir, edje_object_part_text_get(ni->o, "e.text.label")))
               {
                  changed = 1;

                  while (l->next)
                    _box_button_free((Nav_Item*)l->next);
                  _box_button_free((Nav_Item*)l);
                  l = NULL;
               }
             else
               {
                  if (!p) sel = ni;
                  l = l->next;
                  continue;
               }
          }

        _box_button_append(inst, dir, _cb_button_click);
        if (!p) sel = (Nav_Item*)inst->l_buttons->last;
        changed = 1;
     }

   free(path);

   if (changed)
     {
        evas_object_geometry_get(inst->o_box, NULL, NULL, &mw, NULL);
        edje_object_size_min_calc(e_scrollframe_edje_object_get(inst->o_scroll), &sw, NULL);

        evas_object_size_hint_max_set(inst->o_scroll, mw + sw, 32);
     }

   EINA_INLIST_FOREACH(inst->l_buttons, ni)
     if (ni == sel)
       {
          edje_object_signal_emit(ni->o, "e,state,selected", "e");
          inst->sel_ni = ni;
       }
     else
       edje_object_signal_emit(ni->o, "e,state,default", "e");

   /* scroll to selected button */
   if (sel)
     {
        Evas_Coord x, y, w, h, xx, yy, ww = 1;
        evas_object_geometry_get(sel->o, &x, &y, &w, &h);

        /* show buttons around selected */
        if (EINA_INLIST_GET(sel)->next)
          {
             ni = (Nav_Item*)EINA_INLIST_GET(sel)->next;
             evas_object_geometry_get(ni->o, NULL, NULL, &ww, NULL);
             w += ww;
          }
        if (EINA_INLIST_GET(sel)->prev)
          {
             ni = (Nav_Item*)EINA_INLIST_GET(sel)->prev;
             evas_object_geometry_get(ni->o, NULL, NULL, &ww, NULL);
             x -= ww;
             w += ww;
          }

        evas_object_geometry_get(inst->o_box, &xx, &yy, NULL, NULL);
        e_scrollframe_child_region_show(inst->o_scroll, x - xx, y - yy, w, h);
     }

   /* update history */
   if ((!inst->ignore_dir) && (eina_list_data_get(inst->current) != real_path))
     {
        if (inst->current)
          {
             while (inst->history != inst->current)
               {
                  eina_stringshare_del(eina_list_data_get(inst->history));
                  inst->history =
                    eina_list_remove_list(inst->history, inst->history);
               }
          }
        inst->history =
          eina_list_prepend(inst->history, eina_stringshare_ref(real_path));
        inst->current = inst->history;
     }
   inst->ignore_dir = 0;

   if (!strcmp(real_path, "/"))
     edje_object_signal_emit(inst->o_base, "e,state,up,disabled", "e");
   else
     edje_object_signal_emit(inst->o_base, "e,state,up,enabled", "e");

   if ((!inst->history) || (eina_list_last(inst->history) == inst->current))
     edje_object_signal_emit(inst->o_base, "e,state,back,disabled", "e");
   else
     edje_object_signal_emit(inst->o_base, "e,state,back,enabled", "e");

   if ((!inst->history) || (inst->history == inst->current))
     edje_object_signal_emit(inst->o_base, "e,state,forward,disabled", "e");
   else
     edje_object_signal_emit(inst->o_base, "e,state,forward,enabled", "e");
}