#include "e_mod_main.h"

typedef struct _View       View;
typedef struct _Smart_Data Smart_Data;
typedef struct _Item       Item;

#define SIZE_LIST   28
#define SIZE_DETAIL 36

struct _View
{
   Evry_View          view;
   Tab_View          *tabs;

   const Evry_State  *state;
   const Evry_Plugin *plugin;

   Evas              *evas;
   Evas_Object       *bg, *sframe, *span;
   int                iw, ih;
   int                zoom;
   int                mode;
   int                mode_prev;

   Eina_List         *handlers;

   Eina_Bool          hiding;
};

/* smart object based on wallpaper module */
struct _Smart_Data
{
   View               *view;
   Eina_List          *items;
   Item               *cur_item;
   Ecore_Idle_Enterer *idle_enter;
   Evas_Coord          x, y, w, h;
   Evas_Coord          cx, cy, cw, ch;
   Evas_Coord          sx, sy;

   double              last_select;
   double              scroll_align;
   double              scroll_align_from;
   double              scroll_align_to;
   double              animator_start;
   Ecore_Animator     *animator;

   int                 slide_offset;
   double              slide;
   double              slide_to;

   int                 sliding;
   int                 mouse_act;
   int                 mouse_x;
   int                 mouse_y;
   int                 mouse_button;
   Item               *it_down;

   Eina_Bool           place;
};

struct _Item
{
   Evry_Item   *item;
   Evas_Object *obj;
   Evas_Coord   x, y, w, h;
   Evas_Object *frame, *image, *thumb;
   Eina_Bool    selected E_BITFIELD;
   Eina_Bool    have_thumb E_BITFIELD;
   Eina_Bool    do_thumb E_BITFIELD;
   Eina_Bool    get_thumb E_BITFIELD;
   Eina_Bool    showing E_BITFIELD;
   Eina_Bool    visible E_BITFIELD;
   Eina_Bool    changed E_BITFIELD;
   int          pos;
   int          max_w, max_h;
};

static View *view = NULL;

static void      _view_clear(Evry_View *view);
static void      _pan_item_select(Evas_Object *obj, Item *it, int scroll);
static void      _animator_del(Evas_Object *obj);
static Eina_Bool _animator(void *data);

static void
_cb_thumb_gen(void *data, Evas_Object *obj EINA_UNUSED, void *event_info EINA_UNUSED)
{
   Evas_Coord w, h;
   Item *it = data;

   if (!it->frame) return;

   e_icon_size_get(it->thumb, &w, &h);
   evas_object_size_hint_aspect_set(it->thumb, EVAS_ASPECT_CONTROL_BOTH, w, h);
   evas_object_size_hint_max_set(it->thumb, w, h);
   edje_object_part_unswallow(it->frame, it->image);
   edje_object_part_swallow(it->frame, "e.swallow.thumb", it->thumb);
   evas_object_show(it->thumb);
   edje_object_signal_emit(it->frame, "e,action,thumb,show_delayed", "e");
   edje_object_message_signal_process(it->frame);
   it->have_thumb = EINA_TRUE;
   it->do_thumb = EINA_FALSE;

   if (it->image) evas_object_del(it->image);
   it->image = NULL;
}

static void
_cb_preload(void *data, Evas_Object *obj EINA_UNUSED, void *event_info EINA_UNUSED)
{
   Item *it = data;

   if (!it->frame) return;
   printf("preload callback!!!!\n");

   edje_object_part_swallow(it->frame, "e.swallow.icon", it->image);
   /* evas_object_show(it->image); */
}

static int
_check_item(const Evry_Item *it)
{
   char *suffix;

   GET_FILE(file, it);

   if (!evry_file_path_get(file) || !file->mime) return 0;

   if (!strncmp(file->mime, "image/", 6))
     return 1;

   if ((suffix = strrchr(it->label, '.')))
     if (!strncmp(suffix, ".edj", 4))
       return 1;

   return 0;
}

static void
_item_down(void *data, Evas *e EINA_UNUSED, Evas_Object *obj EINA_UNUSED, void *event_info)
{
   Evas_Event_Mouse_Down *ev = event_info;
   Item *it = data;
   Smart_Data *sd = evas_object_smart_data_get(it->obj);
   const Evry_State *s;
   if (!sd) return;

   sd->mouse_act = 1;
   sd->it_down = it;
   sd->mouse_button = ev->button;

   s = sd->view->state;

   if ((ev->button == 1) && (ev->flags & EVAS_BUTTON_DOUBLE_CLICK))
     {
        if (it != sd->cur_item)
          {
             evry_item_select(s, it->item);
             _pan_item_select(it->obj, it, 0);
          }

        if (it->item->browseable)
          evry_browse_item(it->item);
        else
          evry_plugin_action(s->selector->win, 1);
     }
   else
     {
        sd->mouse_x = ev->canvas.x;
        sd->mouse_y = ev->canvas.y;
     }
}

static void
_item_up(void *data, Evas *e EINA_UNUSED, Evas_Object *obj EINA_UNUSED, void *event_info)
{
   Evas_Event_Mouse_Up *ev = event_info;
   Item *it = data;
   Smart_Data *sd = evas_object_smart_data_get(it->obj);
   const Evry_State *s;
   if (!sd) return;

   sd->mouse_x = 0;
   sd->mouse_y = 0;
   if (!sd->it_down)
     return;

   edje_object_signal_emit(sd->view->bg, "e,action,hide,into", "e");
   edje_object_signal_emit(sd->view->bg, "e,action,hide,back", "e");
   sd->it_down = NULL;

   s = sd->view->state;

   if (ev->button == 1)
     {
        if (!(ev->event_flags & EVAS_EVENT_FLAG_ON_HOLD) &&
            (it != sd->cur_item))
          {
             evry_item_select(s, it->item);
             _pan_item_select(it->obj, it, 0);
          }
     }
   else if (ev->button == 3)
     {
        evry_item_select(s, it->item);
        _pan_item_select(it->obj, it, 0);

        evry_plugin_action(s->selector->win, 0);
     }
}

static void
_item_select(Item *it)
{
   it->selected = EINA_TRUE;
   edje_object_signal_emit(it->frame, "e,state,selected", "e");

   if (it->thumb)
     {
        if (strcmp(evas_object_type_get(it->thumb), "e_icon"))
          edje_object_signal_emit(it->thumb, "e,state,selected", "e");
        else
          e_icon_selected_set(it->thumb, EINA_TRUE);
     }

   if (it->image)
     {
        if (strcmp(evas_object_type_get(it->image), "e_icon"))
          edje_object_signal_emit(it->image, "e,state,selected", "e");
        else
          e_icon_selected_set(it->image, EINA_TRUE);
     }
}

static void
_item_unselect(Item *it)
{
   it->selected = EINA_FALSE;
   edje_object_signal_emit(it->frame, "e,state,unselected", "e");

   if (it->thumb)
     {
        if (strcmp(evas_object_type_get(it->thumb), "e_icon"))
          edje_object_signal_emit(it->thumb, "e,state,unselected", "e");
        else
          e_icon_selected_set(it->thumb, EINA_FALSE);
     }

   if (it->image)
     {
        if (strcmp(evas_object_type_get(it->image), "e_icon"))
          edje_object_signal_emit(it->image, "e,state,unselected", "e");
        else
          e_icon_selected_set(it->image, EINA_FALSE);
     }
}

//static double _icon_time;

static void
_item_show(View *v, Item *it, Evas_Object *list)
{
   if (it->visible)
     return;

   if (!it->frame)
     {
        it->frame = edje_object_add(v->evas);
        if (v->mode == VIEW_MODE_THUMB)
          {
             e_theme_edje_object_set(it->frame, "base/theme/modules/everything",
                                     "e/modules/everything/thumbview/item/thumb");
          }
        else
          {
             e_theme_edje_object_set(it->frame, "base/theme/modules/everything",
                                     "e/modules/everything/thumbview/item/list");

             if (v->mode == VIEW_MODE_DETAIL)
               edje_object_signal_emit(it->frame, "e,state,detail,show", "e");
          }

        evas_object_event_callback_add(it->frame, EVAS_CALLBACK_MOUSE_DOWN,
                                       _item_down, it);
        evas_object_event_callback_add(it->frame, EVAS_CALLBACK_MOUSE_UP,
                                       _item_up, it);
        evas_object_smart_member_add(it->frame, list);

        evas_object_clip_set(it->frame, evas_object_clip_get(list));

        if (it->item->selected)
          _item_select(it);

        if (it->item->marked)
          edje_object_signal_emit(it->frame, "e,state,marked", "e");
     }

   edje_object_part_text_set(it->frame, "e.text.label", it->item->label);

   if (v->mode == VIEW_MODE_DETAIL && it->item->detail)
     edje_object_part_text_set(it->frame, "e.text.detail", it->item->detail);

   evas_object_show(it->frame);

   if (it->item->browseable)
     edje_object_signal_emit(it->frame, "e,state,browseable", "e");

   if (!it->image && !it->have_thumb)
     {
        //double t = ecore_time_get();
        it->image = evry_util_icon_get(it->item, v->evas);
        //_icon_time += ecore_time_get() - t;

        if (it->image)
          {
             if (it->max_w == 0)
               e_icon_size_get(it->image, &it->max_w, &it->max_h);

             if ((it->max_w > 0) && (it->max_h > 0))
               evas_object_size_hint_max_set(it->image, it->max_w * 2, it->max_h * 2);
             else
               it->max_w = -1;

             if (0 && e_icon_preload_get(it->image) && !evas_object_visible_get(it->image))
               {
                  evas_object_smart_callback_add(it->image, "preloaded", _cb_preload, it);
               }
             else
               {
                  edje_object_part_swallow(it->frame, "e.swallow.icon", it->image);
                  evas_object_show(it->image);
               }
          }
        else it->have_thumb = EINA_TRUE;
     }

   if ((it->get_thumb) || (CHECK_TYPE(it->item, EVRY_TYPE_FILE) && _check_item(it->item)))
     {
        char *suffix;

        it->get_thumb = EINA_TRUE;

        it->thumb = e_thumb_icon_add(v->evas);

        GET_FILE(file, it->item);

        evas_object_smart_callback_add(it->thumb, "e_thumb_gen", _cb_thumb_gen, it);

        e_thumb_icon_size_set(it->thumb, it->w, it->h);

        if (it->item->icon && it->item->icon[0])
          e_thumb_icon_file_set(it->thumb, it->item->icon, NULL);
        else if ((suffix = strrchr(file->path, '.')) && (!strncmp(suffix, ".edj", 4)))
          {
             e_thumb_icon_file_set(it->thumb, file->path, "e/desktop/background");
             e_thumb_icon_size_set(it->thumb, 128, 80);
          }
        else
          e_thumb_icon_file_set(it->thumb, file->path, NULL);

        e_thumb_icon_begin(it->thumb);
        it->do_thumb = EINA_TRUE;
     }

   edje_object_signal_emit(it->frame, "e,action,thumb,show", "e");

   it->visible = EINA_TRUE;
}

static void
_item_hide(Item *it)
{
   if (it->do_thumb) e_thumb_icon_end(it->thumb);

   if (it->thumb) evas_object_del(it->thumb);
   if (it->image) evas_object_del(it->image);
   if (it->frame) evas_object_del(it->frame);

   it->thumb = NULL;
   it->image = NULL;
   it->frame = NULL;

   it->have_thumb = EINA_FALSE;
   it->do_thumb = EINA_FALSE;
   it->visible = EINA_FALSE;
}

static int
_place_items(Smart_Data *sd)
{
   Eina_List *l;
   Item *it;
   int divider;
   Evas_Coord x = 0, y = 0, ww, hh, mw = 0, mh = 0;

   sd->place = EINA_FALSE;

   if (sd->view->mode == VIEW_MODE_LIST)
     {
        ww = sd->w;
        hh = SIZE_LIST;
     }
   else if (sd->view->mode == VIEW_MODE_DETAIL)
     {
        ww = sd->w;
        hh = SIZE_DETAIL;
     }
   else
     {
        int w, h;
        Evas_Object *o = edje_object_add(sd->view->evas);
        e_theme_edje_object_set(o, "base/theme/modules/everything",
                                "e/modules/everything/thumbview/item/thumb");
        edje_object_size_min_get(o, &w, &h);
        evas_object_del(o);

        if ((w > 0) && (h > 0))
          {
             divider = sd->w / w;
             if (divider < 1) divider = 1;
             ww = w + (sd->w - divider * w) / divider;
             hh = ((double)h / (double)w * (double)ww);
          }
        else
          {
             if (sd->view->zoom == 0)
               ww = 96;
             else if (sd->view->zoom == 1)
               ww = 128;
             else
               ww = 192;

             divider = sd->w / ww;
             if (divider < 1) divider = 1;
             ww += (sd->w - divider * ww) / divider;

             divider = sd->h / ww;
             if (divider < 1) divider = 1;
             hh = ww + (sd->h - divider * ww) / divider;

             if (hh > ww)
               hh = ww + (sd->h - (divider + 1) * ww) / (divider + 1);
          }
     }

   EINA_LIST_FOREACH (sd->items, l, it)
     {
        it->x = x;
        it->y = y;
        it->w = ww;
        it->h = hh;

        if ((x + ww) > mw) mw = x + ww;
        if ((y + hh) > mh) mh = y + hh;
        x += ww;

        if (x <= (sd->w - ww))
          continue;

        x = 0;
        y += hh;
     }

   if ((sd->view->mode == VIEW_MODE_LIST) ||
       (sd->view->mode == VIEW_MODE_DETAIL))
     mh += sd->h % hh;

   if ((mw != sd->cw) || (mh != sd->ch))
     {
        sd->cw = mw;
        sd->ch = mh;

        if (sd->cx > (sd->cw - sd->w))
          sd->cx = sd->cw - sd->w;
        if (sd->cy > (sd->ch - sd->h))
          sd->cy = sd->ch - sd->h;
        if (sd->cx < 0)
          sd->cx = 0;
        if (sd->cy < 0)
          sd->cy = 0;

        return 1;
     }

   return 0;
}

static Eina_Bool
_e_smart_reconfigure_do(void *data)
{
   Evas_Object *obj = data;
   Smart_Data *sd = evas_object_smart_data_get(obj);
   Eina_List *l;
   Item *it;
   Evas_Coord xx, yy;
   double t;

   if (!sd)
     return ECORE_CALLBACK_CANCEL;

   if (sd->w < 1)
     {
        sd->idle_enter = NULL;
        return ECORE_CALLBACK_CANCEL;
     }

   if (sd->view->hiding)
     {
        sd->idle_enter = NULL;
        return ECORE_CALLBACK_CANCEL;
     }

   if (sd->cx > (sd->cw - sd->w)) sd->cx = sd->cw - sd->w;
   if (sd->cy > (sd->ch - sd->h)) sd->cy = sd->ch - sd->h;
   if (sd->cx < 0) sd->cx = 0;
   if (sd->cy < 0) sd->cy = 0;

   if (sd->place && _place_items(sd))
     {
        evas_object_smart_callback_call(obj, "changed", NULL);
        return ECORE_CALLBACK_RENEW;
     }

   t = ecore_time_get();

   EINA_LIST_FOREACH (sd->items, l, it)
     {
        xx = sd->x - sd->cx + it->x;
        yy = sd->y - sd->cy + it->y;

        if (E_INTERSECTS(xx, yy, it->w, it->h, 0, sd->y - it->h * 3,
                         sd->x + sd->w, sd->y + sd->h + it->h * 6))
          {
             if (!it->visible)
               _item_show(sd->view, it, obj);

             evas_object_move(it->frame, xx, yy);
             evas_object_resize(it->frame, it->w, it->h);
          }
        else if (it->visible)
          {
             _item_hide(it);
          }
        it->changed = EINA_FALSE;

        if (ecore_time_get() - t > 0.01)
          return ECORE_CALLBACK_RENEW;
     }

   sd->idle_enter = NULL;

   return ECORE_CALLBACK_CANCEL;
}

static void
_e_smart_reconfigure(Evas_Object *obj)
{
   Smart_Data *sd = evas_object_smart_data_get(obj);

   if (sd->idle_enter) return;
   sd->idle_enter = ecore_idle_enterer_before_add(_e_smart_reconfigure_do, obj);
}

static void
_e_smart_add(Evas_Object *obj)
{
   Smart_Data *sd = calloc(1, sizeof(Smart_Data));
   if (!sd) return;

   sd->sx = sd->sy = -1;
   evas_object_smart_data_set(obj, sd);
}

static void
_e_smart_del(Evas_Object *obj)
{
   Smart_Data *sd = evas_object_smart_data_get(obj);

   if (sd->idle_enter)
     ecore_idle_enterer_del(sd->idle_enter);

   free(sd);
   evas_object_smart_data_set(obj, NULL);
}

static void
_e_smart_move(Evas_Object *obj, Evas_Coord x, Evas_Coord y)
{
   Smart_Data *sd = evas_object_smart_data_get(obj);
   sd->x = x;
   sd->y = y;

   _e_smart_reconfigure(obj);
}

static void
_e_smart_resize(Evas_Object *obj, Evas_Coord w, Evas_Coord h)
{
   Smart_Data *sd = evas_object_smart_data_get(obj);
   sd->w = w;
   sd->h = h;

   sd->place = EINA_TRUE;
   _e_smart_reconfigure(obj);
   /* evas_object_smart_callback_call(obj, "changed", NULL); */
}

static void
_e_smart_show(Evas_Object *obj EINA_UNUSED){}

static void
_e_smart_hide(Evas_Object *obj EINA_UNUSED){}

static void
_e_smart_color_set(Evas_Object *obj EINA_UNUSED, int r EINA_UNUSED, int g EINA_UNUSED, int b EINA_UNUSED, int a EINA_UNUSED){}

static void
_e_smart_clip_set(Evas_Object *obj EINA_UNUSED, Evas_Object *clip EINA_UNUSED){}

static void
_e_smart_clip_unset(Evas_Object *obj EINA_UNUSED){}

static Evas_Object *
_pan_add(Evas *evas)
{
   static Evas_Smart *smart = NULL;
   static const Evas_Smart_Class sc =
   {
      "evry_items",
      EVAS_SMART_CLASS_VERSION,
      _e_smart_add,
      _e_smart_del,
      _e_smart_move,
      _e_smart_resize,
      _e_smart_show,
      _e_smart_hide,
      _e_smart_color_set,
      _e_smart_clip_set,
      _e_smart_clip_unset,
      NULL,
      NULL,
      NULL,
      NULL,
      NULL,
      NULL,
      NULL
   };

   if (smart == NULL)
     smart = evas_smart_class_new(&sc);

   return evas_object_smart_add(evas, smart);
}

static void
_pan_set(Evas_Object *obj, Evas_Coord x, Evas_Coord y)
{
   Smart_Data *sd = evas_object_smart_data_get(obj);
   if (x > (sd->cw - sd->w)) x = sd->cw - sd->w;
   if (y > (sd->ch - sd->h)) y = sd->ch - sd->h;
   if (x < 0) x = 0;
   if (y < 0) y = 0;
   if ((sd->cx == x) && (sd->cy == y)) return;
   sd->cx = x;
   sd->cy = y;
   _e_smart_reconfigure(obj);
}

static void
_pan_get(Evas_Object *obj, Evas_Coord *x, Evas_Coord *y)
{
   Smart_Data *sd = evas_object_smart_data_get(obj);
   if (x) *x = sd->cx;
   if (y) *y = sd->cy;
}

static void
_pan_max_get(Evas_Object *obj, Evas_Coord *x, Evas_Coord *y)
{
   Smart_Data *sd = evas_object_smart_data_get(obj);
   if (x)
     {
        if (sd->w < sd->cw) *x = sd->cw - sd->w;
        else *x = 0;
     }
   if (y)
     {
        if (sd->h < sd->ch) *y = sd->ch - sd->h;
        else *y = 0;
     }
}

static void
_pan_child_size_get(Evas_Object *obj, Evas_Coord *w, Evas_Coord *h)
{
   Smart_Data *sd = evas_object_smart_data_get(obj);
   if (w) *w = sd->cw;
   if (h) *h = sd->ch;
}

static void
_pan_view_set(Evas_Object *obj, View *v)
{
   Smart_Data *sd = evas_object_smart_data_get(obj);
   sd->view = v;
}

static Item *
_pan_item_add(Evas_Object *obj, Evry_Item *item)
{
   Smart_Data *sd = evas_object_smart_data_get(obj);
   Item *it;

   it = E_NEW(Item, 1);
   if (!it) return NULL;

   sd->items = eina_list_append(sd->items, it);
   it->obj = obj;
   it->item = item;
   it->changed = EINA_TRUE;

   evry_item_ref(item);

   sd->place = EINA_TRUE;
   _e_smart_reconfigure(obj);

   return it;
}

static void
_pan_item_remove(Evas_Object *obj, Item *it)
{
   Smart_Data *sd = evas_object_smart_data_get(obj);

   sd->items = eina_list_remove(sd->items, it);

   _item_hide(it);

   evry_item_free(it->item);

   sd->place = EINA_TRUE;
   _e_smart_reconfigure(obj);

   E_FREE(it);
}

static void
_animator_del(Evas_Object *obj)
{
   Smart_Data *sd = evas_object_smart_data_get(obj);

   sd->animator = NULL;
}

static Eina_Bool
_animator(void *data)
{
   Smart_Data *sd = evas_object_smart_data_get(data);
   if (!sd) return ECORE_CALLBACK_CANCEL;
   double da;
   double pos = (ecore_loop_time_get() - sd->animator_start) / 0.2;
   int wait = 0;

   if (pos < 0.0) pos = 0.0;
   else if (pos > 1.0) pos = 1.0;
   if (!EINA_DBL_EQ(sd->scroll_align, sd->scroll_align_to))
     {
        sd->scroll_align = ((sd->scroll_align_from * (1.0 - pos)) +
                            (sd->scroll_align_to * pos));
        da = sd->scroll_align - sd->scroll_align_to;
        if (da < 0.0) da = -da;
        if (da < 0.02) sd->scroll_align = sd->scroll_align_to;
        else wait++;

        e_scrollframe_child_pos_set(sd->view->sframe,
                                    0, sd->scroll_align);
     }

   sd->place = EINA_TRUE;

   if (wait)
     return ECORE_CALLBACK_RENEW;

   _animator_del(data);

   return ECORE_CALLBACK_CANCEL;
}

static int
_child_region_get(Evas_Object *obj, Evas_Coord y, Evas_Coord h)
{
   Smart_Data *sd = evas_object_smart_data_get(obj);
   Evas_Coord my = 0, ch = 0, py = 0, ny;

   py = sd->cy;
   ch = sd->ch;

   if (sd->h < sd->ch)
     my = sd->ch - sd->h;
   else
     my = 0;

   ny = py;
   if (y < py) ny = y;
   else if ((y + h) > (py + (ch - my)))
     {
        ny = y + h - (ch - my);
        if (ny > y) ny = y;
     }

   if (ny < 0) ny = 0;

   return ny;
}

static void
_pan_item_select(Evas_Object *obj, Item *it, int scroll)
{
   Smart_Data *sd = evas_object_smart_data_get(obj);
   double align = -1;

   if (sd->cur_item)
     {
        _item_unselect(sd->cur_item);
        sd->cur_item = NULL;
     }

   if (!it) return;

   _item_select(it);
   sd->cur_item = it;

   if (evry_conf->scroll_animate)
     {
        double now = ecore_time_get();

        if (now - sd->last_select < 0.08)
          {
             sd->scroll_align = sd->scroll_align_to;
             scroll = 0;
          }

        sd->last_select = now;
     }
   else scroll = 0;

   if (sd->mouse_act)
     return;

   if (sd->view->mode == VIEW_MODE_THUMB)
     {
        if (sd->view->zoom < 2)
          align = _child_region_get(obj, it->y - it->h, it->h * 3);
        else
          align = _child_region_get(obj, it->y, it->h);
     }
   else
     {
        align = _child_region_get(obj, it->y - it->h * 2, it->h * 5);
     }

   if (scroll && evry_conf->scroll_animate)
     {
        sd->scroll_align_to = align;

        if ((!EINA_DBL_EQ(align, sd->cy)) && !sd->animator)
          {
             sd->animator_start = ecore_loop_time_get();
             sd->scroll_align_from = sd->scroll_align;
             sd->animator = ecore_animator_add(_animator, obj);
          }
     }
   else
     {
        sd->scroll_align = sd->scroll_align_to;

        if (align >= 0)
          {
             sd->scroll_align = align;
             sd->scroll_align_to = align;
             e_scrollframe_child_pos_set(sd->view->sframe,
                                         0, sd->scroll_align);
          }

        _animator_del(obj);
     }

   _e_smart_reconfigure(obj);
}

static void
_clear_items(Evas_Object *obj)
{
   Smart_Data *sd = evas_object_smart_data_get(obj);
   Eina_List *l;
   Item *it;

   _animator_del(obj);

   EINA_LIST_FOREACH (sd->items, l, it)
     _item_hide(it);
}

static void
_view_clear(Evry_View *ev)
{
   View *v = (View *)ev;
   Smart_Data *sd = evas_object_smart_data_get(v->span);
   Item *it;
   if (!sd) return;

   sd->mouse_x = 0;
   sd->mouse_y = 0;
   sd->mouse_act = 0;
   sd->it_down = NULL;

   _clear_items(v->span);

   if (sd->items)
     {
        EINA_LIST_FREE (sd->items, it)
          {
             evry_item_free(it->item);
             E_FREE(it);
          }
     }

   sd->place = EINA_TRUE;
   _e_smart_reconfigure(v->span);

   v->tabs->clear(v->tabs);
}

static int
_sort_cb(const void *data1, const void *data2)
{
   const Item *it1 = data1;
   const Item *it2 = data2;

   return it1->pos - it2->pos;
}

static int
_update_frame(Evas_Object *obj)
{
   Smart_Data *sd = evas_object_smart_data_get(obj);

   _animator_del(obj);

   sd->scroll_align = 0;

   e_scrollframe_child_pos_set(sd->view->sframe, 0, sd->scroll_align);


   if (sd->idle_enter)
     {
        ecore_idle_enterer_del(sd->idle_enter);
        sd->idle_enter = NULL;
     }

   sd->place = EINA_TRUE;

   _e_smart_reconfigure_do(obj);

   _pan_item_select(obj, sd->cur_item, 0);

   _e_smart_reconfigure(obj);

   return 0;
}

static int
_view_update(Evry_View *ev)
{
   GET_VIEW(v, ev);
   Smart_Data *sd = evas_object_smart_data_get(v->span);
   Item *v_it;
   Evry_Item *p_it;
   Eina_List *l, *ll, *v_remove = NULL, *v_items = NULL;
   int pos, last_pos, last_vis = 0, first_vis = 0;
   Eina_Bool update = EINA_FALSE;
   Evry_Plugin *p = v->state->plugin;

   if (!sd) return 0;
   sd->cur_item = NULL;
   sd->it_down = NULL;
   sd->mouse_act = 0;
   sd->mouse_x = 0;
   sd->mouse_y = 0;

   v->hiding = EINA_FALSE;

   if (!p)
     {
        _view_clear(ev);
        return 1;
     }

   if (p != v->plugin && (v->plugin || (v->mode == VIEW_MODE_NONE)))
     {
        if (p->config->view_mode != v->mode)
          {
             _clear_items(v->span);

             if (p->config->view_mode < 0)
               v->mode = evry_conf->view_mode;
             else
               v->mode = p->config->view_mode;
          }
     }

   /* go through current view items */
   EINA_LIST_FOREACH (sd->items, l, v_it)
     {
        last_pos = v_it->pos;
        v_it->pos = 0;
        pos = 1;

        /* go through plugins current items */
        EINA_LIST_FOREACH (p->items, ll, p_it)
          {
             if (v_it->item == p_it)
               {
                  if (pos != last_pos)
                    v_it->changed = EINA_TRUE;

                  v_it->pos = pos;

                  if (p_it->selected)
                    {
                       sd->cur_item = v_it;
                       v_it->selected = EINA_TRUE;
                    }
                  else
                    {
                       if (v_it->selected && v_it->frame)
                         edje_object_signal_emit
                           (v_it->frame, "e,state,unselected", "e");
                       v_it->selected = EINA_FALSE;
                    }
                  break;
               }
             pos++;
          }

        if (v_it->visible)
          {
             if (!first_vis) first_vis = v_it->pos;
             last_vis = v_it->pos;
          }

        /* view item is in list of current items */
        if (v_it->pos)
          {
             v_items = eina_list_append(v_items, v_it->item);

             if (v_it->visible && v_it->changed)
               update = EINA_TRUE;
          }
        else
          {
             if (v_it->visible) update = EINA_TRUE;
             v_remove = eina_list_append(v_remove, v_it);
          }
     }

   EINA_LIST_FREE (v_remove, v_it)
     _pan_item_remove(v->span, v_it);

   /* go through plugins current items */
   pos = 1;
   EINA_LIST_FOREACH (p->items, l, p_it)
     {
        /* item is not already in view */
        if (!eina_list_data_find_list(v_items, p_it))
          {
             v_it = _pan_item_add(v->span, p_it);

             if (!v_it) continue;

             v_it->pos = pos;

             if (p_it == v->state->cur_item)
               {
                  sd->cur_item = v_it;
                  v_it->selected = EINA_TRUE;
               }

             if (pos > first_vis && pos < last_vis)
               update = EINA_TRUE;
          }
        pos++;
     }
   if (v_items) eina_list_free(v_items);

   sd->items = eina_list_sort(sd->items, -1, _sort_cb);

   if (update || !last_vis || v->plugin != p)
     {
        v->plugin = p;
        _update_frame(v->span);
     }

   v->tabs->update(v->tabs);

   return 0;
}

static int
_cb_key_down(Evry_View *eview, const Ecore_Event_Key *ev)
{
   View *v = (View *)eview;
   Smart_Data *sd = evas_object_smart_data_get(v->span);
   Eina_List *l = NULL, *ll;
   Item *it = NULL;
   const Evry_State *s;
   int slide;

   if (!sd || !(s = v->state) || !(s->plugin))
     return 0;

   const char *key = ev->key;

   sd->mouse_act = 0;
   sd->mouse_x = 0;
   sd->mouse_y = 0;

   if ((ev->modifiers & ECORE_EVENT_MODIFIER_CTRL) &&
       (!strcmp(key, "2")))
     {
        if (v->mode == VIEW_MODE_LIST)
          v->mode = VIEW_MODE_DETAIL;
        else
          v->mode = VIEW_MODE_LIST;

        v->zoom = 0;
        _clear_items(v->span);
        _update_frame(v->span);
        goto end;
     }
   else if (((ev->modifiers & ECORE_EVENT_MODIFIER_CTRL) &&
             (!strcmp(key, "3"))) || !strcmp(key, "XF86Forward"))
     {
        if (v->mode != VIEW_MODE_THUMB)
          {
             v->zoom = 0;
             v->mode = VIEW_MODE_THUMB;
             _clear_items(v->span);
          }
        else
          {
             v->zoom++;
             if (v->zoom > 2) v->zoom = 0;
             if (v->zoom == 2)
               _clear_items(v->span);
          }
        _update_frame(v->span);
        goto end;
     }
   else if (!strcmp(key, "XF86Back"))
     {
        if (v->mode == VIEW_MODE_LIST ||
            v->mode == VIEW_MODE_DETAIL)
          {
             v->zoom = 0;
             v->mode = VIEW_MODE_THUMB;
          }
        else
          {
             v->mode = VIEW_MODE_DETAIL;
          }

        _clear_items(v->span);
        _update_frame(v->span);
        goto end;
     }

   if (((ev->modifiers & ECORE_EVENT_MODIFIER_SHIFT) ||
        (ev->modifiers & ECORE_EVENT_MODIFIER_CTRL)) &&
       (!strcmp(key, "Up")))
     {
        if (!sd->items) goto end;
        it = sd->items->data;

        _pan_item_select(v->span, it, 1);
        evry_item_select(s, it->item);
        goto end;
     }
   else if (((ev->modifiers & ECORE_EVENT_MODIFIER_SHIFT) ||
             (ev->modifiers & ECORE_EVENT_MODIFIER_CTRL)) &&
            (!strcmp(key, "Down")))
     {
        if (!sd->items) goto end;

        it = eina_list_last(sd->items)->data;
        _pan_item_select(v->span, it, 1);
        evry_item_select(s, it->item);
        goto end;
     }

   if ((ev->modifiers & ECORE_EVENT_MODIFIER_CTRL) &&
       (!strcmp(key, "plus")))
     {
        EINA_LIST_FOREACH (sd->items, ll, it)
          {
             if (!it->item->marked)
               {
                  if (it->frame)
                    edje_object_signal_emit(it->frame, "e,state,marked", "e");
                  evry_item_mark(s, it->item, 1);
               }
          }
        goto end;
     }
   else if ((ev->modifiers & ECORE_EVENT_MODIFIER_CTRL) &&
            (!strcmp(key, "minus")))
     {
        EINA_LIST_FOREACH (sd->items, ll, it)
          {
             if (it->item->marked)
               {
                  if (it->frame)
                    edje_object_signal_emit(it->frame, "e,state,unmarked", "e");
                  evry_item_mark(s, it->item, 0);
               }
          }
        goto end;
     }
   else if (!strcmp(key, "comma"))
     {
        if (!sd->cur_item)
          goto end;

        if (!sd->cur_item->item->marked)
          {
             edje_object_signal_emit(sd->cur_item->frame, "e,state,marked", "e");
             evry_item_mark(s, sd->cur_item->item, 1);
          }
        else
          {
             edje_object_signal_emit(sd->cur_item->frame, "e,state,unmarked", "e");
             evry_item_mark(s, sd->cur_item->item, 0);
          }

        if (v->mode == VIEW_MODE_THUMB)
          key = "Right";
        else
          key = "Down";
     }

   if ((slide = v->tabs->key_down(v->tabs, ev)))
     {
        /* _view_update(view, -slide); */
        _view_update(eview);
        return 1;
     }

   if (sd->items)
     l = eina_list_data_find_list(sd->items, sd->cur_item);
   if (!l)
     l = sd->items;

   if (v->mode == VIEW_MODE_THUMB && !evry_conf->cycle_mode)
     {
        if (!strcmp(key, "Right"))
          {
             if (l && l->next)
               it = l->next->data;

             if (it)
               {
                  _pan_item_select(v->span, it, 1);
                  evry_item_select(s, it->item);
               }
             goto end;
          }
        else if (!strcmp(key, "Left"))
          {
             if (l && l->prev)
               it = l->prev->data;

             if (it)
               {
                  _pan_item_select(v->span, it, 1);
                  evry_item_select(s, it->item);
               }
             goto end;
          }
     }
   if (!strcmp(key, "Down"))
     {
        if (v->mode == VIEW_MODE_THUMB &&
            (!evry_conf->cycle_mode) &&
            (sd->cur_item))
          {
             EINA_LIST_FOREACH (l, ll, it)
               {
                  if (it->y > sd->cur_item->y &&
                      it->x >= sd->cur_item->x)
                    break;
               }
          }

        if (!it && l && l->next)
          it = l->next->data;

        if (it)
          {
             _pan_item_select(v->span, it, 1);
             evry_item_select(s, it->item);
          }
        goto end;
     }
   else if (!strcmp(key, "Up"))
     {
        if (v->mode == VIEW_MODE_THUMB &&
            (!evry_conf->cycle_mode) &&
            (sd->cur_item))
          {
             for (ll = l; ll; ll = ll->prev)
               {
                  it = ll->data;

                  if (it->y < sd->cur_item->y &&
                      it->x <= sd->cur_item->x)
                    break;
               }
          }

        if (!it && l && l->prev)
          it = l->prev->data;

        if (it)
          {
             _pan_item_select(v->span, it, 1);
             evry_item_select(s, it->item);
          }
        goto end;
     }
   else if ((!strcmp(key, "Prior") || (!strcmp(key, "Next"))))
     {
        int cur = 0;
        int next = (!strcmp(key, "Next"));
        if (sd->cur_item)
          cur = sd->cur_item->y;

        EINA_LIST_FOREACH (sd->items, l, it)
          {
             if (next)
               {
                  if (it->y >= cur + sd->h) break;
               }
             else
               {
                  if (it->y + it->h >= cur - sd->h) break;
               }

             if (!l->next)
               break;
          }

        if (it)
          {
             _pan_item_select(v->span, it, 0);
             evry_item_select(s, it->item);
          }
        goto end;
     }
   else if (!ev->modifiers && !strcmp(key, "Return"))
     {
        if (v->mode == VIEW_MODE_THUMB)
          {
             if (!sd->cur_item)
               goto end;

             if (evry_browse_item(sd->cur_item->item))
               goto end;
          }
     }

   return 0;

end:
   return 1;
}

static Eina_Bool
_cb_item_changed(void *data, int type EINA_UNUSED, void *event)
{
   Evry_Event_Item_Changed *ev = event;
   View *v = data;
   Eina_List *l;
   Item *it;
   Smart_Data *sd = evas_object_smart_data_get(v->span);
   if (!sd) return ECORE_CALLBACK_PASS_ON;

   EINA_LIST_FOREACH (sd->items, l, it)
     if (it->item == ev->item)
       break;

   if (!it)
     return ECORE_CALLBACK_PASS_ON;

   if (ev->changed_selection)
     {
        _pan_item_select(v->span, it, 1);
        evry_item_select(v->state, ev->item);
     }

   if (!it->visible)
     return ECORE_CALLBACK_PASS_ON;

   edje_object_part_text_set(it->frame, "e.text.label", it->item->label);

   if (ev->changed_icon)
     {
        if (it->do_thumb) e_thumb_icon_end(it->thumb);
        if (it->thumb) evas_object_del(it->thumb);
        if (it->image) evas_object_del(it->image);

        it->thumb = NULL;
        it->image = NULL;

        it->have_thumb = EINA_FALSE;
        it->do_thumb = EINA_FALSE;
     }

   return ECORE_CALLBACK_PASS_ON;
}

static Eina_Bool
_cb_action_performed(void *data, int type EINA_UNUSED, void *event)
{
   Evry_Event_Action_Performed *ev = event;
   View *v = data;
   Eina_List *l;
   Item *it;
   Smart_Data *sd;

   sd = evas_object_smart_data_get(v->span);
   if (!sd) return ECORE_CALLBACK_PASS_ON;

   EINA_LIST_FOREACH (sd->items, l, it)
     {
        if ((it->item == ev->it1) ||
            (it->item == ev->it2))
          break;
     }

   if (it && it->visible)
     {
        evas_object_raise(it->frame);
        edje_object_signal_emit(it->frame, "e,action,go", "e");
     }

   return ECORE_CALLBACK_PASS_ON;
}

static void
_view_cb_mouse_wheel(void *data EINA_UNUSED, Evas *e EINA_UNUSED, Evas_Object *obj, void *event_info)
{
   Evas_Event_Mouse_Wheel *ev = event_info;
   Smart_Data *sd = evas_object_smart_data_get(obj);
   if (!sd) return;
   if (ev->z)
     {
        if (sd->cur_item)
          _item_select(sd->cur_item);
        sd->mouse_act = 1;
     }
}

// FIXME: 'drag into' make mouse input hang after some trials
#if 0
static void
_view_cb_mouse_down(void *data, Evas *e EINA_UNUSED, Evas_Object *obj EINA_UNUSED, void *event_info)
{
   Evas_Event_Mouse_Down *ev = event_info;
   Smart_Data *sd = evas_object_smart_data_get(data);
   if (!sd) return;
   sd->mouse_act = 1;
   sd->mouse_button = ev->button;
   sd->mouse_x = ev->canvas.x;
   sd->mouse_y = ev->canvas.y;
}

static void
_view_cb_mouse_up(void *data, Evas *e EINA_UNUSED, Evas_Object *obj EINA_UNUSED, void *event_info EINA_UNUSED)
{
   /* Evas_Event_Mouse_Up *ev = event_info; */
   Smart_Data *sd = evas_object_smart_data_get(data);
   if (!sd) return;
   sd->mouse_x = 0;
   sd->mouse_y = 0;
   sd->mouse_button = 0;
   edje_object_signal_emit(sd->view->bg, "e,action,hide,into", "e");
   edje_object_signal_emit(sd->view->bg, "e,action,hide,back", "e");
}

#define SLIDE_RESISTANCE 80

static void
_view_cb_mouse_move(void *data, Evas *e EINA_UNUSED, Evas_Object *obj EINA_UNUSED, void *event_info)
{
   Evas_Event_Mouse_Move *ev = event_info;
   Smart_Data *sd = evas_object_smart_data_get(data);
   Evry_Selector *sel;
   int diff_y, diff_x;

   if (!sd) return;

   if (!sd->mouse_x)
     goto end;

   sel = sd->view->state->selector;
   if (!sel || !sel->states)
     return;

   diff_x = abs(ev->cur.canvas.x - sd->mouse_x);
   diff_y = abs(ev->cur.canvas.y - sd->mouse_y);

   if (diff_y > 15 + (diff_x / 2))
     {
        edje_object_signal_emit(sd->view->bg, "e,action,hide,into", "e");
        edje_object_signal_emit(sd->view->bg, "e,action,hide,back", "e");
        goto end;
     }

   if ((sel->states->next) || (sel != sel->win->selectors[0]))
     edje_object_signal_emit(sd->view->bg, "e,action,show,back", "e");

   if (sd->it_down)
     {
        if ((sd->it_down->item->browseable) ||
            (sel != sel->win->selectors[2]))
          edje_object_signal_emit(sd->view->bg, "e,action,show,into", "e");

        if ((sd->cur_item != sd->it_down) && (diff_x > 10))
          {
             evry_item_select(sd->view->state, sd->it_down->item);
             _pan_item_select(data, sd->it_down, 0);
          }
     }
   if (sd->mouse_button == 1)
     {
        if (ev->cur.canvas.x - sd->mouse_x > SLIDE_RESISTANCE)
          {
             sd->it_down = NULL;
             sd->mouse_x = 0;
             sd->mouse_y = 0;
             if (sel->states->next)
               evry_browse_back(sel);
             else
               evry_selectors_switch(sel->win, -1, EINA_TRUE);
          }
        else if ((sd->it_down && (sd->cur_item == sd->it_down)) &&
                 (sd->mouse_x - ev->cur.canvas.x > SLIDE_RESISTANCE))
          {
             edje_object_signal_emit(sd->view->bg, "e,action,hide,into", "e");
             edje_object_signal_emit(sd->view->bg, "e,action,hide,back", "e");

             if (sd->it_down->item->browseable)
               {
                  evry_browse_item(sd->it_down->item);
               }
             else
               {
                  evry_selectors_switch(sel->win, 1, EINA_TRUE);
               }

             sd->it_down = NULL;
             sd->mouse_x = 0;
             sd->mouse_y = 0;
          }
     }
   return;

end:
   sd->it_down = NULL;
   sd->mouse_x = 0;
   sd->mouse_y = 0;
}
#endif

static void
_cb_list_hide(void *data, Evas_Object *obj EINA_UNUSED, const char *emission EINA_UNUSED, const char *source EINA_UNUSED)
{
   View *v = data;

   v->hiding = EINA_TRUE;
}

static void
_cb_list_show(void *data, Evas_Object *obj EINA_UNUSED, const char *emission EINA_UNUSED, const char *source EINA_UNUSED)
{
   View *v = data;

   v->hiding = EINA_FALSE;
}

static Evry_View *
_view_create(Evry_View *ev, const Evry_State *s, Evas_Object *swallow)
{
   GET_VIEW(parent, ev);

   View *v;
   Ecore_Event_Handler *h;

   v = E_NEW(View, 1);
   v->view = *ev;
   v->state = s;
   v->evas = evas_object_evas_get(swallow);

   if (s->plugin)
     {
        if ((s->selector->states->next) &&
            ((s->plugin->config->view_mode < 0) ||
             (!strcmp(s->plugin->name, N_("All")))))
          v->mode = parent->mode;
        else if (s->plugin->config->view_mode >= 0)
          v->mode = s->plugin->config->view_mode;
        else
          v->mode = evry_conf->view_mode;
     }
   else
     {
        if (s->selector->states->next)
          v->mode = parent->mode;
        else
          v->mode = evry_conf->view_mode;
     }

   v->plugin = s->plugin;
   v->mode_prev = v->mode;
   v->zoom = parent->zoom;

   v->bg = edje_object_add(v->evas);
   e_theme_edje_object_set(v->bg, "base/theme/modules/everything",
                           "e/modules/everything/thumbview/main/window");
   // scrolled thumbs
   v->span = _pan_add(v->evas);
   _pan_view_set(v->span, v);
   evas_object_event_callback_add(v->span, EVAS_CALLBACK_MOUSE_WHEEL,
                                  _view_cb_mouse_wheel, NULL);
#if 0
   evas_object_event_callback_add(v->bg, EVAS_CALLBACK_MOUSE_MOVE,
                                  _view_cb_mouse_move, v->span);
   evas_object_event_callback_add(v->bg, EVAS_CALLBACK_MOUSE_DOWN,
                                  _view_cb_mouse_down, v->span);
   evas_object_event_callback_add(v->bg, EVAS_CALLBACK_MOUSE_UP,
                                  _view_cb_mouse_up, v->span);
#endif
   // the scrollframe holding the scrolled thumbs
   v->sframe = e_scrollframe_add(v->evas);
   e_scrollframe_custom_theme_set(v->sframe, "base/theme/modules/everything",
                                  "e/modules/everything/thumbview/main/scrollframe");
   e_scrollframe_thumbscroll_force(v->sframe, 1);

   e_scrollframe_extern_pan_set(v->sframe, v->span,
                                _pan_set, _pan_get, _pan_max_get,
                                _pan_child_size_get);
   edje_object_part_swallow(v->bg, "e.swallow.list", v->sframe);

   evas_object_show(v->sframe);
   evas_object_show(v->span);

   v->tabs = evry_tab_view_new(EVRY_VIEW(v), v->state, v->bg);

   EVRY_VIEW(v)->o_list = v->bg;
   EVRY_VIEW(v)->o_bar = v->tabs->o_tabs;

   h = evry_event_handler_add(EVRY_EVENT_ITEM_CHANGED, _cb_item_changed, v);
   v->handlers = eina_list_append(v->handlers, h);
   h = evry_event_handler_add(EVRY_EVENT_ACTION_PERFORMED, _cb_action_performed, v);
   v->handlers = eina_list_append(v->handlers, h);

   edje_object_signal_callback_add(v->bg, "e,action,hide,list", "e", _cb_list_hide, v);
   edje_object_signal_callback_add(v->bg, "e,action,show,list", "e", _cb_list_show, v);
   return EVRY_VIEW(v);
}

static void
_view_destroy(Evry_View *ev)
{
   Ecore_Event_Handler *h;

   GET_VIEW(v, ev);

   _view_clear(ev);

   evas_object_del(v->span);
   evas_object_del(v->bg);
   evas_object_del(v->sframe);

   evry_tab_view_free(v->tabs);

   EINA_LIST_FREE (v->handlers, h)
     ecore_event_handler_del(h);

   E_FREE(v);
}

Eina_Bool
evry_view_init(void)
{
   if (!evry_api_version_check(EVRY_API_VERSION))
     return EINA_FALSE;

   View *v = E_NEW(View, 1);

   v->view.id = EVRY_VIEW(v);
   v->view.name = "Icon View";
   v->view.create = &_view_create;
   v->view.destroy = &_view_destroy;
   v->view.update = &_view_update;
   v->view.clear = &_view_clear;
   v->view.cb_key_down = &_cb_key_down;
   v->mode = VIEW_MODE_NONE;

   evry_view_register(EVRY_VIEW(v), 1);

   view = v;

   return EINA_TRUE;
}

void
evry_view_shutdown(void)
{
   evry_view_unregister(EVRY_VIEW(view));
   E_FREE(view);
}

