LOK: reuse cached json object for ViewId where available

Change-Id: I5e29ec2863e06d3dfcbad95c55e355805f12e259
Reviewed-on: https://gerrit.libreoffice.org/67895
Tested-by: Jenkins
Reviewed-by: Ashod Nakashian <ashnakash@gmail.com>

desktop/inc/lib/init.hxx

@@ -116,6 +116,9 @@ namespace desktop {
             /// Validate that the payload and parsed object match.
             bool validate() const;
 
+            /// Returns true iff there is cached data.
+            bool isCached() const { return PayloadObject.which() != 0; }
+
             int Type;
             std::string PayloadString;
 

desktop/source/lib/init.cxx

@@ -575,6 +575,13 @@ int lcl_getViewId(const std::string& payload)
     return 0;
 }
 
+int lcl_getViewId(const desktop::CallbackFlushHandler::CallbackData& rCallbackData)
+{
+    if (rCallbackData.isCached())
+        return rCallbackData.getJson().get<int>("viewId");
+    return lcl_getViewId(rCallbackData.PayloadString);
+}
+
 std::string extractCertificate(const std::string & certificate)
 {
     const std::string header("-----BEGIN CERTIFICATE-----");
@@ -1076,7 +1083,7 @@ void CallbackFlushHandler::queue(const int type, const char* data)
                 const int nViewId = lcl_getViewId(payload);
                 removeAll(
                     [type, nViewId] (const queue_type::value_type& elem) {
-                        return (elem.Type == type && nViewId == lcl_getViewId(elem.PayloadString));
+                        return (elem.Type == type && nViewId == lcl_getViewId(elem));
                     }
                 );
             }
@@ -1373,11 +1380,11 @@ void CallbackFlushHandler::Invoke()
         std::unique_lock<std::mutex> lock(m_mutex);
 
         SAL_INFO("lok", "Flushing " << m_queue.size() << " elements.");
-        for (auto& pair : m_queue)
+        for (const auto& rCallbackData : m_queue)
         {
-            const int type = pair.Type;
-            const auto& payload = pair.PayloadString;
-            const int viewId = lcl_isViewCallbackType(type) ? lcl_getViewId(payload) : -1;
+            const int type = rCallbackData.Type;
+            const auto& payload = rCallbackData.PayloadString;
+            const int viewId = lcl_isViewCallbackType(type) ? lcl_getViewId(rCallbackData) : -1;
 
             if (viewId == -1)
             {