atspi: handle "gesture_required" attribute

The elementary sends the "detail2" information highlight based on the attribute
"gesture_required" when an object grabs.

If an object has attribute key "gesture_required", and "scroll" for its value,
then the "detail2" is 1. Otherwise, the "detail2" is 0.

The screen-reader AT client calls "ObjectNeedsScrollGesture" method of
e-mod-tizen-screen-reader window manager module with object geometry value,
if the "detail2" is 1. Otherwise, the object geometry value is not used.

The e-mod-tizen-screen-reader window manager module will send mouse event
based on the object geometry.

Application side could use this feature setting attribute as below:
 - elm_atspi_accessible_attribute_append(btn, "gesture_required", "scroll");

This patch set depends on:
https://review.tizen.org/gerrit/#/c/142108/ (screen-reader)
https://review.tizen.org/gerrit/#/c/142107/ (e-mod-tizen-screen-reader)

Change-Id: I0b731ce947be569b2d782fdc21f18c79ffebf70e

diff --git a/src/lib/elm_atspi_bridge.c b/src/lib/elm_atspi_bridge.c
index 9eb6192..6a81045 100644 (file)
--- a/src/lib/elm_atspi_bridge.c
+++ b/src/lib/elm_atspi_bridge.c
@@ -5407,6 +5407,30 @@ _handle_listener_change(void *data, const Eldbus_Message *msg EINA_UNUSED)
    _registered_events_list_update(data);
 }
 
+//TIZEN_ONLY(20170802): handle "gesture_required" attribute
+static Eina_Bool
+_scroll_gesture_required_is(Eo *obj)
+{
+   Eina_Bool ret = EINA_FALSE;
+   Eina_List *l, *attr_list = NULL;
+   Elm_Atspi_Attribute *attr = NULL;
+
+   eo_do(obj, attr_list = elm_interface_atspi_accessible_attributes_get());
+   EINA_LIST_FOREACH(attr_list, l, attr)
+     {
+        if (!strcmp(attr->key, "gesture_required") && !strcmp(attr->value, "scroll"))
+          {
+             ret = EINA_TRUE;
+             break;
+          }
+     }
+   if (attr_list)
+     elm_atspi_attributes_list_free(attr_list);
+
+   return ret;
+}
+//
+
 static Eina_Bool
 _state_changed_signal_send(void *data, Eo *obj EINA_UNUSED, const Eo_Event_Description *desc EINA_UNUSED, void *event_info)
 {
@@ -5455,8 +5479,15 @@ _state_changed_signal_send(void *data, Eo *obj EINA_UNUSED, const Eo_Event_Descr
 
    type_desc = elm_states_to_atspi_state[state_data->type].name;
 
+   //TIZEN_ONLY(20170802): handle "gesture_required" attribute
+   unsigned int det2 = 0;
+   if ((state_data->type == ELM_ATSPI_STATE_HIGHLIGHTED) &&
+       (_scroll_gesture_required_is(obj)))
+     det2++;
+
    _bridge_signal_send(data, obj, ATSPI_DBUS_INTERFACE_EVENT_OBJECT,
-                       &_event_obj_signals[ATSPI_OBJECT_EVENT_STATE_CHANGED], type_desc, state_data->new_value, 0, NULL);
+                       &_event_obj_signals[ATSPI_OBJECT_EVENT_STATE_CHANGED], type_desc, state_data->new_value, det2, NULL);
+   //
    return EINA_TRUE;
 }