genlist: Implemented genlist expand mode and content_min_limit function

Summary:
1. Implemented genlist mode ELM_LIST_EXPAND
2. Implemented content_min_limit function which override scroll interface.
  This function will be used by call API elm_scroller_content_min_limit.
  This function will set the object minimum size as its scroll content size,
  if parameter value is EINA_TRUE.

@feature

Test Plan: Add new test case in test_popup.c

Reviewers: raster, seoz

Subscribers: stefan_schmidt, bluezery

Differential Revision: https://phab.enlightenment.org/D1279

3 files changed, 115 insertions, 2 deletions

diff --git a/src/bin/test_popup.c b/src/bin/test_popup.c
index 61f0688cc..fec2abbca 100644
--- a/src/bin/test_popup.c
+++ b/src/bin/test_popup.c
@@ -594,6 +594,14 @@ _list_cb(void *data, Evas_Object *obj EINA_UNUSED, void *event_info EINA_UNUSED)
    evas_object_del(data);
 }
 
+char *
+gl_popup_text_get(void *data, Evas_Object *obj EINA_UNUSED, const char *part EINA_UNUSED)
+{
+   char buf[256];
+   snprintf(buf, sizeof(buf), "Item # %i", (int)(uintptr_t)data);
+   return strdup(buf);
+}
+
 static void
 _popup_center_title_list_content_1button_cb(void *data, Evas_Object *obj EINA_UNUSED,
                                             void *event_info EINA_UNUSED)
@@ -624,6 +632,54 @@ _popup_center_title_list_content_1button_cb(void *data, Evas_Object *obj EINA_UN
 }
 
 static void
+_popup_center_title_genlist_content_1button_cb(void *data, Evas_Object *obj EINA_UNUSED,
+                                            void *event_info EINA_UNUSED)
+{
+   Evas_Object *popup, *genlist;
+   Evas_Object *btn;
+   int i;
+
+   popup = elm_popup_add(data);
+   elm_object_part_text_set(popup, "title,text", "Title");
+
+   Elm_Genlist_Item_Class *itc1 = elm_genlist_item_class_new();
+   itc1->item_style = "default";
+   itc1->func.text_get = gl_popup_text_get;
+   itc1->func.content_get = NULL;
+   itc1->func.state_get = NULL;
+   itc1->func.del = NULL;
+
+   // genlist as a popup content
+   genlist = elm_genlist_add(popup);
+   elm_genlist_mode_set(genlist, ELM_LIST_COMPRESS);
+   elm_scroller_content_min_limit(genlist, EINA_FALSE, EINA_TRUE);
+
+   for (i = 0; i < 10; i++)
+     {
+        elm_genlist_item_append(genlist,
+                                itc1,
+                                (void *)(uintptr_t)i/* item data */,
+                                NULL/* parent */,
+                                ELM_GENLIST_ITEM_NONE,
+                                NULL,
+                                NULL);
+     }
+   elm_genlist_item_class_free(itc1);
+   elm_object_content_set(popup, genlist);
+
+   // popup buttons
+   btn = elm_button_add(popup);
+   elm_object_text_set(btn, "OK");
+   elm_object_part_content_set(popup, "button1", btn);
+   evas_object_smart_callback_add(btn, "clicked", _popup_close_cb, popup);
+
+   // popup show should be called after adding all the contents and the buttons
+   // of popup to set the focus into popup's contents correctly.
+   evas_object_show(popup);
+}
+
+
+static void
 _subpopup_cb(void *data, Evas_Object *obj EINA_UNUSED,
                                             void *event_info EINA_UNUSED)
 {
@@ -720,6 +776,9 @@ test_popup(void *data EINA_UNUSED, Evas_Object *obj EINA_UNUSED,
    elm_list_item_append(list, "popup-center-title + list content + 1 button",
                         NULL, NULL, _popup_center_title_list_content_1button_cb,
                         win);
+   elm_list_item_append(list, "popup-center-title + genlist content + 1 button",
+                        NULL, NULL, _popup_center_title_genlist_content_1button_cb,
+                        win);
    elm_list_item_append(list, "subpopup + X button",
                         NULL, NULL, _subpopup_cb,
                         win);
diff --git a/src/lib/elm_genlist.c b/src/lib/elm_genlist.c
index 2169d6139..d8e9d6b40 100644
--- a/src/lib/elm_genlist.c
+++ b/src/lib/elm_genlist.c
@@ -840,22 +840,52 @@ _elm_genlist_elm_layout_sizing_eval(Eo *obj, Elm_Genlist_Data *sd)
         minw = vmw;
         minh = vmh;
      }
-   else if (sd->mode == ELM_LIST_LIMIT)
+
+   if (sd->scr_minw)
      {
         maxw = -1;
         minw = vmw + sd->realminw;
      }
    else
      {
+         minw = vmw;
+     }
+   if (sd->scr_minh)
+     {
+        maxh = -1;
+        minh = vmh + sd->minh;
+     }
+   else
+     {
         minw = vmw;
         minh = vmh;
      }
 
+   if ((maxw > 0) && (minw > maxw))
+     minw = maxw;
+   if ((maxh > 0) && (minh > maxh))
+     minh = maxh;
+
    evas_object_size_hint_min_set(obj, minw, minh);
    evas_object_size_hint_max_set(obj, maxw, maxh);
 }
 
 static void
+_content_min_limit_cb(Evas_Object *obj,
+                      Eina_Bool w,
+                      Eina_Bool h)
+{
+   ELM_GENLIST_DATA_GET(obj, sd);
+
+   if ((sd->mode == ELM_LIST_LIMIT) ||
+       (sd->mode == ELM_LIST_EXPAND)) return;
+   sd->scr_minw = !!w;
+   sd->scr_minh = !!h;
+
+   elm_layout_sizing_eval(obj);
+}
+
+static void
 _item_contract_emit(Elm_Object_Item *eo_it)
 {
    ELM_GENLIST_ITEM_DATA_GET(eo_it, it);
@@ -5387,7 +5417,8 @@ _elm_genlist_evas_object_smart_add(Eo *obj, Elm_Genlist_Data *priv)
          elm_interface_scrollable_vbar_unpress_cb_set(_vbar_unpress_cb),
          elm_interface_scrollable_hbar_drag_cb_set(_hbar_drag_cb),
          elm_interface_scrollable_hbar_press_cb_set(_hbar_press_cb),
-         elm_interface_scrollable_hbar_unpress_cb_set(_hbar_unpress_cb));
+         elm_interface_scrollable_hbar_unpress_cb_set(_hbar_unpress_cb),
+         elm_interface_scrollable_content_min_limit_cb_set(_content_min_limit_cb));
 
    priv->mode = ELM_LIST_SCROLL;
    priv->max_items_per_block = MAX_ITEMS_PER_BLOCK;
@@ -7076,6 +7107,23 @@ _elm_genlist_mode_set(Eo *obj, Elm_Genlist_Data *sd, Elm_List_Mode mode)
 {
    if (sd->mode == mode) return;
    sd->mode = mode;
+
+   if (sd->mode == ELM_LIST_LIMIT)
+     {
+        sd->scr_minw = EINA_TRUE;
+        sd->scr_minh = EINA_FALSE;
+     }
+   else if (sd->mode == ELM_LIST_EXPAND)
+     {
+        sd->scr_minw = EINA_TRUE;
+        sd->scr_minh = EINA_TRUE;
+     }
+   else
+     {
+        sd->scr_minw = EINA_FALSE;
+        sd->scr_minh = EINA_FALSE;
+     }
+
    elm_layout_sizing_eval(obj);
 }
 
diff --git a/src/lib/elm_widget_genlist.h b/src/lib/elm_widget_genlist.h
index 7d0c9009e..a6e24227d 100644
--- a/src/lib/elm_widget_genlist.h
+++ b/src/lib/elm_widget_genlist.h
@@ -60,6 +60,12 @@ struct _Elm_Genlist_Data
    int                                   item_width, item_height;
    int                                   group_item_width, group_item_height;
    int                                   minw, minh;
+   Eina_Bool                             scr_minw : 1; /* a flag for determining
+                                                        * minimum width to limit
+                                                        * as their content size */
+   Eina_Bool                             scr_minh : 1; /* a flag for determining
+                                                        * minimum height to limit
+                                                        * as their content size */
    unsigned int                          item_count;
    Evas_Coord                            pan_x, pan_y;
    Elm_Object_Select_Mode                select_mode;