1 files changed, 51 insertions, 21 deletions

diff --git a/src/window_manager.cpp b/src/window_manager.cpp
index 965c60d..33f19ee 100644
--- a/src/window_manager.cpp
+++ b/src/window_manager.cpp
@@ -174,21 +174,25 @@ result<int> WindowManager::api_request_surface(char const *appid, char const *dr
 
     if(!g_app_list.contains(str_id))
     {
-        lid = this->lc->getNewLayerID(role);
+        unsigned lid = this->generateLayerForClient(role);
         if (lid == 0)
         {
-            // register drawing_name as fallback and make it displayed.
-            lid = this->lc->getNewLayerID(string("fallback"));
-            HMI_DEBUG("%s is not registered in layers.json, then fallback as normal app", role.c_str());
-            if (lid == 0)
-            {
-                return Err<int>("Designated role does not match any role, fallback is disabled");
-            }
+            return Err<int>("Designated role does not match any role, fallback is disabled");
         }
-        this->lc->createNewLayer(lid);
         // add client into the db
         g_app_list.addClient(str_id, lid, drawing_name);
     }
+    else
+    {
+        // This case occurs when an client calls "subscribe" before request_surface.
+        // Then application doesn't have layer and role yet.
+        auto client = g_app_list.lookUpClient(str_id);
+        if(client->layerID() == 0)
+        {
+            client->setLayerID(this->generateLayerForClient(role));
+        }
+        client->setRole(drawing_name);
+    }
 
     // generate surface ID for ivi-shell application
     auto rname = this->id_alloc.lookup(role);
@@ -238,21 +242,25 @@ char const *WindowManager::api_request_surface(char const *appid, char const *dr
 
     if(!g_app_list.contains(str_id))
     {
-        unsigned l_id = this->lc->getNewLayerID(role);
+        unsigned l_id = this->generateLayerForClient(role);
         if (l_id == 0)
         {
-            // register drawing_name as fallback and make it displayed.
-            l_id = this->lc->getNewLayerID("fallback");
-            HMI_DEBUG("%s is not registered in layers.json, then fallback as normal app", role.c_str());
-            if (l_id == 0)
-            {
-                return "Designated role does not match any role, fallback is disabled";
-            }
+            return "Designated role does not match any role, fallback is disabled";
         }
-        this->lc->createNewLayer(l_id);
         // add client into the db
         g_app_list.addClient(str_id, l_id, drawing_name);
     }
+    else
+    {
+        // This case occurs when an client calls "subscribe" before request_surface.
+        // Then application doesn't have layer and role yet.
+        auto client = g_app_list.lookUpClient(str_id);
+        if(client->layerID() == 0)
+        {
+            client->setLayerID(this->generateLayerForClient(role));
+        }
+        client->setRole(drawing_name);
+    }
 
     auto rname = this->id_alloc.lookup(role);
 
@@ -436,11 +444,15 @@ bool WindowManager::api_subscribe(afb_req_t req, EventType event_id)
     {
         string id = appid;
         free(appid);
-        auto client = g_app_list.lookUpClient(id);
-        if(client != nullptr)
+        if(!g_app_list.contains(id))
         {
-            ret = client->subscribe(req, kListEventName[event_id]);
+            g_app_list.addClient(id);
         }
+        g_app_list.lookUpClient(id)->subscribe(req, kListEventName[event_id]);
+    }
+    else
+    {
+        HMI_ERROR("appid is not set");
     }
     return ret;
 }
@@ -637,6 +649,24 @@ void WindowManager::processError(WMError error)
     this->processNextRequest();
 }
 
+unsigned WindowManager::generateLayerForClient(const string& role)
+{
+    unsigned lid = this->lc->getNewLayerID(role);
+    if (lid == 0)
+    {
+        // register drawing_name as fallback and make it displayed.
+        lid = this->lc->getNewLayerID(string("fallback"));
+        HMI_DEBUG("%s is not registered in layers.json, then fallback as normal app", role.c_str());
+        if (lid == 0)
+        {
+            return lid;
+        }
+    }
+    this->lc->createNewLayer(lid);
+    // add client into the db
+    return lid;
+}
+
 WMError WindowManager::setRequest(const string& appid, const string &role, const string &area,
                             Task task, unsigned* req_num)
 {