#include #include "elm_priv.h" /* TODO: ideally, the default theme would use map{} blocks on the TEXT parts to implement their fading in/out propertly (as in the clock widget) */ /* TODO: if one ever wants to extend it to receiving generic widgets as items, be my guest. in this case, remember to implement the items tooltip infra. */ /* TODO: implement disabled mode -- disable_hook() and stuff. */ /* TODO: fix default theme image borders for looong strings as item labels. */ /* TODO: set text elipsis on labels if one enforces mininum size on * the overall widget less the required for displaying it. */ /* TODO: find a way to, in the default theme, to detect we are * bootstrapping (receiving the 1st message) and populate the downmost * TEXT parts with the same text as the upmost, where appropriate. */ #define FLIP_FIRST_INTERVAL (0.85) #define FLIP_MIN_INTERVAL (0.1) #define MSG_FLIP_DOWN (1) #define MSG_FLIP_UP (2) #define MAX_LEN_DEFAULT (50) #define DATA_GET eina_list_data_get struct _Elm_Flipselector_Item { ELM_WIDGET_ITEM; const char *label; Evas_Smart_Cb func; void *data; int deleted : 1; }; typedef struct _Widget_Data Widget_Data; typedef struct _Elm_Flipselector_Item Elm_Flipselector_Item; struct _Widget_Data { Evas_Object *self; Evas_Object *base; Eina_List *items; Eina_List *current; Eina_List *sentinel; /* item containing the largest label string */ int walking; unsigned int max_len; Ecore_Timer *spin; double interval, first_interval; }; static const char *widtype = NULL; static void _del_hook(Evas_Object *obj); static void _theme_hook(Evas_Object *obj); static void _sizing_eval(Evas_Object *obj); static void _update_view(Evas_Object *obj); static void _callbacks_set(Evas_Object *obj); static void _flip_up(Widget_Data *wd); static void _flip_down(Widget_Data *wd); static Eina_Bool _item_del_pre_hook(Elm_Object_Item *it); static const char SIG_SELECTED[] = "selected"; static const char SIG_UNDERFLOWED[] = "underflowed"; static const char SIG_OVERFLOWED[] = "overflowed"; static const Evas_Smart_Cb_Description _signals[] = { {SIG_SELECTED, ""}, {SIG_UNDERFLOWED, ""}, {SIG_OVERFLOWED, ""}, {NULL, NULL} }; static void _item_text_set_hook(Elm_Object_Item *it, const char *part, const char *label) { ELM_OBJ_ITEM_CHECK_OR_RETURN(it); Widget_Data *wd; Eina_List *l; Elm_Flipselector_Item *item; if (!label) return; if (part && strcmp(part ,"default")) return; item = (Elm_Flipselector_Item *) it; wd = elm_widget_data_get(WIDGET(item)); if ((!wd) || (!wd->items)) return; l = eina_list_data_find_list(wd->items, item); if (!l) return; eina_stringshare_del(item->label); item->label = eina_stringshare_add_length(label, wd->max_len); if (strlen(label) > strlen(elm_object_item_text_get(DATA_GET(wd->sentinel)))) wd->sentinel = l; if (wd->current == l) { _update_view(WIDGET(item)); _sizing_eval(wd->self); } } static const char * _item_text_get_hook(const Elm_Object_Item *it, const char *part) { ELM_OBJ_ITEM_CHECK_OR_RETURN(it, NULL); Elm_Flipselector_Item *item, *_item; Widget_Data *wd; Eina_List *l; if (part && strcmp(part ,"default")) return NULL; item = (Elm_Flipselector_Item *) it; wd = elm_widget_data_get(WIDGET(item)); if ((!wd) || (!wd->items)) return NULL; EINA_LIST_FOREACH(wd->items, l, _item) if (_item == item) return item->label; return NULL; } static void _item_signal_emit_hook(Elm_Object_Item *it, const char *emission, const char *source) { ELM_OBJ_ITEM_CHECK_OR_RETURN(it); Elm_Flipselector_Item *item = (Elm_Flipselector_Item *) it; edje_object_signal_emit(VIEW(item), emission, source); } static Elm_Flipselector_Item * _item_new(Evas_Object *obj, const char *label, Evas_Smart_Cb func, const void *data) { unsigned int len; Elm_Flipselector_Item *it; Widget_Data *wd = elm_widget_data_get(obj); it = elm_widget_item_new(obj, Elm_Flipselector_Item); if (!it) return NULL; elm_widget_item_del_pre_hook_set(it, _item_del_pre_hook); elm_widget_item_text_set_hook_set(it, _item_text_set_hook); elm_widget_item_text_get_hook_set(it, _item_text_get_hook); elm_widget_item_signal_emit_hook_set(it, _item_signal_emit_hook); len = strlen(label); if (len > wd->max_len) len = wd->max_len; it->label = eina_stringshare_add_length(label, len); it->func = func; it->base.data = data; /* TODO: no view here, but if one desires general contents in the * future... */ return it; } static inline void _item_free(Elm_Flipselector_Item *it) { eina_stringshare_del(it->label); elm_widget_item_free(it); } static void _del_hook(Evas_Object *obj) { Elm_Flipselector_Item *item; Widget_Data *wd = elm_widget_data_get(obj); if (!wd) return; if (wd->walking) ERR("flipselector deleted while walking.\n"); EINA_LIST_FREE(wd->items, item) _item_free(item); if (wd->spin) ecore_timer_del(wd->spin); free(wd); } static void _theme_hook(Evas_Object *obj) { Widget_Data *wd; const char *max_len; wd = elm_widget_data_get(obj); if (!wd) return; _elm_theme_object_set(obj, wd->base, "flipselector", "base", elm_widget_style_get(obj)); edje_object_scale_set(wd->base, elm_widget_scale_get(obj) * _elm_config->scale); max_len = edje_object_data_get(wd->base, "max_len"); if (!max_len) wd->max_len = MAX_LEN_DEFAULT; else { wd->max_len = atoi(max_len); if (!wd->max_len) wd->max_len = MAX_LEN_DEFAULT; } _update_view(obj); _sizing_eval(obj); } static void _sentinel_eval(Widget_Data *wd) { Elm_Flipselector_Item *it; Eina_List *l; if (!wd->items) { wd->sentinel = NULL; return; } wd->sentinel = wd->items; EINA_LIST_FOREACH(wd->items, l, it) { if (strlen(elm_object_item_text_get((Elm_Object_Item *) it)) > strlen(elm_object_item_text_get(DATA_GET(wd->sentinel)))) wd->sentinel = l; } } /* TODO: create a flag to avoid looping here all times */ static void _flipselector_process_deletions(Widget_Data *wd) { Elm_Flipselector_Item *it; Eina_List *l; Eina_Bool skip = EINA_TRUE; Eina_Bool sentinel_eval = EINA_FALSE; wd->walking++; /* avoid nested deletions */ EINA_LIST_FOREACH(wd->items, l, it) { if (!it->deleted) continue; if (wd->current == l) { if (wd->current == wd->sentinel) sentinel_eval = EINA_TRUE; wd->current = eina_list_prev(wd->current); } wd->items = eina_list_remove(wd->items, it); if (!wd->current) wd->current = wd->items; _item_free(it); skip = EINA_FALSE; if (eina_list_count(wd->items) <= 1) edje_object_signal_emit(wd->base, "elm,state,button,hidden", "elm"); else edje_object_signal_emit(wd->base, "elm,state,button,visible", "elm"); } if (!skip) _update_view(wd->self); if (sentinel_eval) _sentinel_eval(wd); wd->walking--; } static inline void _flipselector_walk(Widget_Data *wd) { if (wd->walking < 0) { ERR("walking was negative. fixed!\n"); wd->walking = 0; } wd->walking++; } static inline void _flipselector_unwalk(Widget_Data *wd) { wd->walking--; if (wd->walking < 0) { ERR("walking became negative. fixed!\n"); wd->walking = 0; } if (wd->walking) return; _flipselector_process_deletions(wd); } static Eina_Bool _event_hook(Evas_Object *obj, Evas_Object *src __UNUSED__, Evas_Callback_Type type, void *event_info) { Evas_Event_Key_Down *ev; Widget_Data *wd; Eina_Bool is_up = EINA_TRUE; if (type != EVAS_CALLBACK_KEY_DOWN) return EINA_FALSE; wd = elm_widget_data_get(obj); if (!wd) return EINA_FALSE; ev = event_info; if (ev->event_flags & EVAS_EVENT_FLAG_ON_HOLD) return EINA_FALSE; if (elm_widget_disabled_get(obj)) return EINA_FALSE; if ((!strcmp(ev->keyname, "Down")) || (!strcmp(ev->keyname, "KP_Down"))) is_up = EINA_FALSE; else if ((strcmp(ev->keyname, "Up")) && (strcmp(ev->keyname, "KP_Up"))) return EINA_FALSE; if (wd->spin) ecore_timer_del(wd->spin); /* TODO: if direction setting via API is not coming in, replace these calls by flip_{next,prev} */ _flipselector_walk(wd); if (is_up) _flip_up(wd); else _flip_down(wd); _flipselector_unwalk(wd); ev->event_flags |= EVAS_EVENT_FLAG_ON_HOLD; return EINA_TRUE; } static void _on_focus_hook(void *data __UNUSED__, Evas_Object *obj) { Widget_Data *wd = elm_widget_data_get(obj); if (!wd) return; /* FIXME: no treatment of this signal so far */ if (elm_widget_focus_get(obj)) { edje_object_signal_emit(wd->base, "elm,action,focus", "elm"); evas_object_focus_set(wd->base, EINA_TRUE); } else { edje_object_signal_emit(wd->base, "elm,action,unfocus", "elm"); evas_object_focus_set(wd->base, EINA_FALSE); } } static void _sizing_eval(Evas_Object *obj) { Widget_Data *wd; const char *tmp = NULL; Evas_Coord minw = -1, minh = -1, w, h; wd = elm_widget_data_get(obj); if (!wd) return; elm_coords_finger_size_adjust(1, &minw, 2, &minh); if (wd->sentinel) { const char *label = elm_object_item_text_get(DATA_GET(wd->sentinel)); tmp = edje_object_part_text_get(wd->base, "top"); edje_object_part_text_set(wd->base, "top", label); } edje_object_size_min_restricted_calc(wd->base, &minw, &minh, minw, minh); elm_coords_finger_size_adjust(1, &minw, 2, &minh); evas_object_size_hint_min_get(obj, &w, &h); if (wd->sentinel) edje_object_part_text_set(wd->base, "top", tmp); if (w > minw) minw = w; if (h > minh) minh = h; evas_object_size_hint_min_set(obj, minw, minh); } static void _update_view(Evas_Object *obj) { Widget_Data *wd; const char *label; Elm_Flipselector_Item *item; wd = elm_widget_data_get(obj); if (!wd) return; label = NULL; item = DATA_GET(wd->current); if (item) label = item->label; edje_object_part_text_set(wd->base, "top", label ? label : ""); edje_object_part_text_set(wd->base, "bottom", label ? label : ""); edje_object_message_signal_process(wd->base); } static void _changed(Widget_Data *wd) { Elm_Flipselector_Item *item; item = DATA_GET(wd->current); if (!item) return; if (item->func) item->func((void *)item->base.data, WIDGET(item), item); if (!item->deleted) evas_object_smart_callback_call(wd->self, SIG_SELECTED, item); } static void _send_msg(Widget_Data *wd, int flipside, char *label) { Edje_Message_String msg; msg.str = label; edje_object_message_send(wd->base, EDJE_MESSAGE_STRING, flipside, &msg); edje_object_message_signal_process(wd->base); _changed(wd); } static void _flip_up(Widget_Data *wd) { Elm_Flipselector_Item *item; if (!wd->current) return; if (wd->current == wd->items) { wd->current = eina_list_last(wd->items); evas_object_smart_callback_call(wd->self, SIG_UNDERFLOWED, NULL); } else wd->current = eina_list_prev(wd->current); item = DATA_GET(wd->current); if (!item) return; _send_msg(wd, MSG_FLIP_UP, (char *)item->label); } static Eina_Bool _signal_val_up(void *data) { Widget_Data *wd = elm_widget_data_get(data); if (!wd) goto val_up_exit_on_error; _flipselector_walk(wd); if (wd->interval > FLIP_MIN_INTERVAL) wd->interval = wd->interval / 1.05; ecore_timer_interval_set(wd->spin, wd->interval); _flip_up(wd); _flipselector_unwalk(wd); return ECORE_CALLBACK_RENEW; val_up_exit_on_error: return ECORE_CALLBACK_CANCEL; } static void _signal_val_up_start(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__) { Widget_Data *wd = elm_widget_data_get(data); if (!wd) return; wd->interval = wd->first_interval; if (wd->spin) ecore_timer_del(wd->spin); wd->spin = ecore_timer_add(wd->interval, _signal_val_up, data); _signal_val_up(data); } static void _flip_down(Widget_Data *wd) { Elm_Flipselector_Item *item; if (!wd->current) return; wd->current = eina_list_next(wd->current); if (!wd->current) { wd->current = wd->items; evas_object_smart_callback_call(wd->self, SIG_OVERFLOWED, NULL); } item = DATA_GET(wd->current); if (!item) return; _send_msg(wd, MSG_FLIP_DOWN, (char *)item->label); } static Eina_Bool _signal_val_down(void *data) { Widget_Data *wd = elm_widget_data_get(data); if (!wd) goto val_down_exit_on_error; _flipselector_walk(wd); if (wd->interval > FLIP_MIN_INTERVAL) wd->interval = wd->interval / 1.05; ecore_timer_interval_set(wd->spin, wd->interval); _flip_down(wd); _flipselector_unwalk(wd); return ECORE_CALLBACK_RENEW; val_down_exit_on_error: return ECORE_CALLBACK_CANCEL; } static void _signal_val_down_start(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__) { Widget_Data *wd = elm_widget_data_get(data); if (!wd) return; wd->interval = wd->first_interval; if (wd->spin) ecore_timer_del(wd->spin); wd->spin = ecore_timer_add(wd->interval, _signal_val_down, data); _signal_val_down(data); } static void _signal_val_change_stop(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__) { Widget_Data *wd = elm_widget_data_get(data); if (!wd) return; if (wd->spin) ecore_timer_del(wd->spin); wd->spin = NULL; } static void _callbacks_set(Evas_Object *obj) { Widget_Data *wd = elm_widget_data_get(obj); edje_object_signal_callback_add(wd->base, "elm,action,up,start", "", _signal_val_up_start, obj); edje_object_signal_callback_add(wd->base, "elm,action,up,stop", "", _signal_val_change_stop, obj); edje_object_signal_callback_add(wd->base, "elm,action,down,start", "", _signal_val_down_start, obj); edje_object_signal_callback_add(wd->base, "elm,action,down,stop", "", _signal_val_change_stop, obj); } static Eina_Bool _item_del_pre_hook(Elm_Object_Item *it) { ELM_OBJ_ITEM_CHECK_OR_RETURN(it, EINA_FALSE); Widget_Data *wd; Elm_Flipselector_Item *item, *item2; Eina_List *l; item = (Elm_Flipselector_Item *) it; wd = elm_widget_data_get(WIDGET(item)); if (!wd) return EINA_FALSE; if (wd->walking > 0) { item->deleted = EINA_TRUE; return EINA_FALSE; } _flipselector_walk(wd); EINA_LIST_FOREACH(wd->items, l, item2) { if (item2 == item) { wd->items = eina_list_remove_list(wd->items, l); if (wd->current == l) { wd->current = l->prev; if (!wd->current) wd->current = l->next; if (wd->current) { item2 = wd->current->data; _send_msg(wd, MSG_FLIP_DOWN, (char *)item2->label); } else _send_msg(wd, MSG_FLIP_DOWN, ""); } break; } } eina_stringshare_del(item->label); _sentinel_eval(wd); _flipselector_unwalk(wd); return EINA_TRUE; } EAPI Evas_Object * elm_flipselector_add(Evas_Object *parent) { Evas_Object *obj; Evas *e; Widget_Data *wd; ELM_WIDGET_STANDARD_SETUP(wd, Widget_Data, parent, e, obj, NULL); ELM_SET_WIDTYPE(widtype, "flipselector"); elm_widget_type_set(obj, "flipselector"); elm_widget_sub_object_add(parent, obj); elm_widget_data_set(obj, wd); wd->self = obj; elm_widget_del_hook_set(obj, _del_hook); elm_widget_theme_hook_set(obj, _theme_hook); /* TODO: elm_widget_disable_hook_set(obj, _disable_hook); */ elm_widget_can_focus_set(obj, EINA_TRUE); elm_widget_on_focus_hook_set(obj, _on_focus_hook, NULL); elm_widget_event_hook_set(obj, _event_hook); wd->base = edje_object_add(e); elm_widget_resize_object_set(obj, wd->base); _callbacks_set(obj); wd->first_interval = FLIP_FIRST_INTERVAL; _theme_hook(obj); evas_object_smart_callbacks_descriptions_set(obj, _signals); return obj; } EAPI void elm_flipselector_flip_next(Evas_Object *obj) { ELM_CHECK_WIDTYPE(obj, widtype); Widget_Data *wd = elm_widget_data_get(obj); if (!wd) return; if (wd->spin) ecore_timer_del(wd->spin); _flipselector_walk(wd); _flip_down(wd); _flipselector_unwalk(wd); } EAPI void elm_flipselector_flip_prev(Evas_Object *obj) { ELM_CHECK_WIDTYPE(obj, widtype); Widget_Data *wd = elm_widget_data_get(obj); if (!wd) return; if (wd->spin) ecore_timer_del(wd->spin); _flipselector_walk(wd); _flip_up(wd); _flipselector_unwalk(wd); } EAPI Elm_Object_Item * elm_flipselector_item_append(Evas_Object *obj, const char *label, void (*func)(void *data, Evas_Object *obj, void *event_info), void *data) { ELM_CHECK_WIDTYPE(obj, widtype) NULL; Elm_Flipselector_Item *item; Widget_Data *wd; wd = elm_widget_data_get(obj); if (!wd) return NULL; item = _item_new(obj, label, func, data); if (!item) return NULL; wd->items = eina_list_append(wd->items, item); if (!wd->current) { wd->current = wd->items; _update_view(obj); } if (!wd->sentinel || (strlen(elm_object_item_text_get((Elm_Object_Item *) item)) > strlen(elm_object_item_text_get(DATA_GET(wd->sentinel))))) { wd->sentinel = eina_list_last(wd->items); _sizing_eval(obj); } if (eina_list_count(wd->items) >= 2) edje_object_signal_emit(wd->base, "elm,state,button,visible", "elm"); return (Elm_Object_Item *) item; } EAPI Elm_Object_Item * elm_flipselector_item_prepend(Evas_Object *obj, const char *label, void (*func)(void *data, Evas_Object *obj, void *event_info), void *data) { ELM_CHECK_WIDTYPE(obj, widtype) NULL; Elm_Flipselector_Item *item; Widget_Data *wd; wd = elm_widget_data_get(obj); if (!wd) return NULL; item = _item_new(obj, label, func, data); if (!item) return NULL; wd->items = eina_list_prepend(wd->items, item); if (!wd->current) { wd->current = wd->items; _update_view(obj); } if (!wd->sentinel || (strlen(elm_object_item_text_get((Elm_Object_Item *) item)) > strlen(elm_object_item_text_get(DATA_GET(wd->sentinel))))) { wd->sentinel = wd->items; _sizing_eval(obj); } if (eina_list_count(wd->items) >= 2) edje_object_signal_emit(wd->base, "elm,state,button,visible", "elm"); return (Elm_Object_Item *) item; } /* TODO: account for deleted items? */ EAPI const Eina_List * elm_flipselector_items_get(const Evas_Object *obj) { ELM_CHECK_WIDTYPE(obj, widtype) NULL; Widget_Data *wd = elm_widget_data_get(obj); if (!wd) return NULL; return wd->items; } EAPI Elm_Object_Item * elm_flipselector_first_item_get(const Evas_Object *obj) { ELM_CHECK_WIDTYPE(obj, widtype) NULL; Elm_Flipselector_Item *it; Widget_Data *wd; Eina_List *l; wd = elm_widget_data_get(obj); if (!wd || !wd->items) return NULL; EINA_LIST_FOREACH(wd->items, l, it) { if (it->deleted) continue; return (Elm_Object_Item *) it; } return NULL; } EAPI Elm_Object_Item * elm_flipselector_last_item_get(const Evas_Object *obj) { ELM_CHECK_WIDTYPE(obj, widtype) NULL; Elm_Flipselector_Item *it; Widget_Data *wd; Eina_List *l; wd = elm_widget_data_get(obj); if (!wd || !wd->items) return NULL; EINA_LIST_REVERSE_FOREACH(wd->items, l, it) { if (it->deleted) continue; return (Elm_Object_Item *) it; } return NULL; } EAPI Elm_Object_Item * elm_flipselector_selected_item_get(const Evas_Object *obj) { ELM_CHECK_WIDTYPE(obj, widtype) NULL; Widget_Data *wd = elm_widget_data_get(obj); if (!wd || !wd->current) return NULL; return DATA_GET(wd->current); } EAPI void elm_flipselector_item_selected_set(Elm_Object_Item *it, Eina_Bool selected) { ELM_OBJ_ITEM_CHECK_OR_RETURN(it); Elm_Flipselector_Item *item, *_item, *cur; int flipside = MSG_FLIP_UP; Widget_Data *wd; Eina_List *l; item = (Elm_Flipselector_Item *) it; wd = elm_widget_data_get(WIDGET(item)); if (!wd) return; cur = DATA_GET(wd->current); if ((selected) && (cur == item)) return; _flipselector_walk(wd); if ((!selected) && (cur == item)) { EINA_LIST_FOREACH(wd->items, l, _item) { if (!_item->deleted) { wd->current = l; _send_msg(wd, MSG_FLIP_UP, (char *)_item->label); break; } } _flipselector_unwalk(wd); return; } EINA_LIST_FOREACH(wd->items, l, _item) { if (_item == cur) flipside = MSG_FLIP_DOWN; if (_item == item) { wd->current = l; _send_msg(wd, flipside, (char *)item->label); break; } } _flipselector_unwalk(wd); } EAPI Eina_Bool elm_flipselector_item_selected_get(const Elm_Object_Item *it) { ELM_OBJ_ITEM_CHECK_OR_RETURN(it, EINA_FALSE); Widget_Data *wd; Elm_Flipselector_Item *item; item = (Elm_Flipselector_Item *) it; wd = elm_widget_data_get(WIDGET(item)); if (!wd) return EINA_FALSE; return (eina_list_data_get(wd->current) == item); } EAPI void elm_flipselector_item_del(Elm_Object_Item *it) { elm_object_item_del(it); } EAPI const char * elm_flipselector_item_label_get(const Elm_Object_Item *it) { return _item_text_get_hook(it, NULL); } EAPI void elm_flipselector_item_label_set(Elm_Object_Item *it, const char *label) { _item_text_set_hook(it, NULL, label); } EAPI Elm_Object_Item * elm_flipselector_item_prev_get(Elm_Object_Item *it) { ELM_OBJ_ITEM_CHECK_OR_RETURN(it, NULL); Elm_Flipselector_Item *item, *_item; Widget_Data *wd; Eina_List *l; item = (Elm_Flipselector_Item *) it; wd = elm_widget_data_get(WIDGET(item)); if ((!wd) || (!wd->items)) return NULL; EINA_LIST_FOREACH(wd->items, l, _item) if (_item == item) { l = eina_list_prev(l); if (!l) return NULL; return DATA_GET(l); } return NULL; } EAPI Elm_Object_Item * elm_flipselector_item_next_get(Elm_Object_Item *it) { ELM_OBJ_ITEM_CHECK_OR_RETURN(it, NULL); Elm_Flipselector_Item *item, *_item; Widget_Data *wd; Eina_List *l; item = (Elm_Flipselector_Item *) it; wd = elm_widget_data_get(WIDGET(item)); if ((!wd) || (!wd->items)) return NULL; EINA_LIST_FOREACH(wd->items, l, _item) if (_item == item) { l = eina_list_next(l); if (!l) return NULL; return DATA_GET(l); } return NULL; } EAPI void elm_flipselector_interval_set(Evas_Object *obj, double interval) { ELM_CHECK_WIDTYPE(obj, widtype); Widget_Data *wd = elm_widget_data_get(obj); if (!wd) return; wd->first_interval = interval; } EAPI double elm_flipselector_interval_get(const Evas_Object *obj) { ELM_CHECK_WIDTYPE(obj, widtype) 0.0; Widget_Data *wd = elm_widget_data_get(obj); if (!wd) return 0; return wd->first_interval; }