3 files changed, 45 insertions, 16 deletions

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 96cad55..9052d70 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -51,6 +51,7 @@ set_target_properties(${TARGET_LIBWM}
     # INTERPROCEDURAL_OPTIMIZATION ON
         CXX_EXTENSIONS OFF
         CXX_STANDARD 14
+        VERSION ${PACKAGE_VERSION}
         CXX_STANDARD_REQUIRED ON)
 
 if (LINK_LIBCXX)
diff --git a/src/libwindowmanager.cpp b/src/libwindowmanager.cpp
index 770d248..267fecc 100644
--- a/src/libwindowmanager.cpp
+++ b/src/libwindowmanager.cpp
@@ -57,6 +57,10 @@ class LibWindowmanager::Impl {
       std::string("flushdraw")
     };
 
+    /* Key for json obejct */
+    const char *kKeyDrawingName = "drawing_name";
+    const char *kKeyDrawingArea = "drawing_area";
+
     // This is the LibWindowmanager interface impl
     int init(int port, char const *token);
 
@@ -134,8 +138,13 @@ void onEvent(void *closure, const char *event, afb_wsj1_msg *msg) {
         return;
     }
 
-    reinterpret_cast<LibWindowmanager::Impl *>(closure)->event(
-        event, json_object_object_get(afb_wsj1_msg_object_j(msg), "data"));
+    json_object *val;
+    if (json_object_object_get_ex(afb_wsj1_msg_object_j(msg), "data", &val)) {
+        reinterpret_cast<LibWindowmanager::Impl *>(closure)->event(event, val);
+    }
+    else {
+        fprintf(stderr, "Not found key \"data\"\n");
+    }
 }
 
 /* called when wsj1 hangsup */
@@ -154,12 +163,6 @@ constexpr struct afb_wsj1_itf itf = {
 // XXX: I am not sure this is the right thing to do though...
 std::recursive_mutex dispatch_mutex;
 
-json_object *drawing_name_json_argument(char const *label) {
-    json_object *j = json_object_new_object();
-    json_object_object_add(j, "drawing_name", json_object_new_string(label));
-    return j;
-}
-
 }  // namespace
 
 /**
@@ -228,8 +231,15 @@ fail:
 int LibWindowmanager::Impl::requestSurface(json_object *object) {
     TRACE();
 
-    const char *tmp_label = json_object_get_string(
-        json_object_object_get(object, LibWindowmanager::kKeyDrawingName));
+    json_object *val;
+    const char *tmp_label;
+    if (json_object_object_get_ex(object, this->kKeyDrawingName, &val)) {
+        tmp_label = json_object_get_string(val);
+    }
+    else {
+        fprintf(stderr, "Not found key \"%s\"\n", this->kKeyDrawingName);
+        return -EINVAL;
+    }
 
     // DrawingName in "object" is overwrited in api_call("RequestSurface")
     // So it is neccesary to copy it.
@@ -249,8 +259,16 @@ int LibWindowmanager::Impl::requestSurface(json_object *object) {
     int rc2 =
         this->api_call("RequestSurface", object, [&rc](bool ok, json_object *j) {
             if (ok) {
-                int id =
-                    json_object_get_int(json_object_object_get(j, "response"));
+                json_object *val;
+                int id;
+                if (json_object_object_get_ex(j, "response", &val)) {
+                    id = json_object_get_int(val);
+                }
+                else {
+                    fprintf(stderr, "Not found key \"response\"\n");
+                    rc = -EINVAL;
+                    return;
+                }
                 char *buf;
                 asprintf(&buf, "%d", id);
                 printf("setenv(\"QT_IVI_SURFACE_ID\", %s, 1)\n", buf);
@@ -328,6 +346,9 @@ void LibWindowmanager::Impl::set_event_handler(enum EventType et, handler_fun fu
     json_object_object_add(j, "event", json_object_new_int(et));
 
     int ret = afb_wsj1_call_j(this->wsj1, wmAPI, "wm_subscribe", j, _on_reply_static, this);
+    if (0 > ret) {
+        fprintf(stderr, "calling %s/wm_subscribe failed\n", wmAPI);
+    }
 
     // Set event handler
     if (et >= Event_Active && et <= Event_FlushDraw) {
@@ -443,8 +464,15 @@ void LibWindowmanager::Impl::event(char const *et, json_object *object) {
 
     auto i = this->handlers.find(oet.second);
     if (i != this->handlers.end()) {
-        const char *label = json_object_get_string(
-            json_object_object_get(object, LibWindowmanager::kKeyDrawingName));
+        json_object *val;
+        const char *label;
+        if (json_object_object_get_ex(object, this->kKeyDrawingName, &val)) {
+            label = json_object_get_string(val);
+        }
+        else {
+            fprintf(stderr, "Not found key \"%s\"\n", this->kKeyDrawingName);
+            return;
+        }
 
         if (this->labels.find(label) != this->labels.end()) {
             i->second(object);
diff --git a/src/libwindowmanager.h b/src/libwindowmanager.h
index 59c5ca5..83dff5f 100644
--- a/src/libwindowmanager.h
+++ b/src/libwindowmanager.h
@@ -38,8 +38,8 @@ public:
     const std::string kStrAreaSub = "sub";
 
     /* Key for json obejct */
-    constexpr static char *kKeyDrawingName = "drawing_name";
-    constexpr static char *kKeyDrawingArea = "drawing_area";
+    const char *kKeyDrawingName = "drawing_name";
+    const char *kKeyDrawingArea = "drawing_area";
 
     enum EventType {
        Event_Active = 0,