LOK: always update the payload string via the cache

Change-Id: I090ceb7d214d0809e86b023a8806b6655627918a
Reviewed-on: https://gerrit.libreoffice.org/67894
Tested-by: Jenkins
Reviewed-by: Ashod Nakashian <ashnakash@gmail.com>

desktop/inc/lib/init.hxx

@@ -102,6 +102,8 @@ namespace desktop {
 
             /// Parse and set the RectangleAndPart object and return it. Clobbers PayloadString.
             RectangleAndPart& setRectangleAndPart(const std::string& payload);
+            /// Set a RectangleAndPart object and update PayloadString.
+            void setRectangleAndPart(const RectangleAndPart& rRectAndPart);
             /// Return the parsed RectangleAndPart instance.
             const RectangleAndPart& getRectangleAndPart() const;
             /// Parse and set the JSON object and return it. Clobbers PayloadString.

desktop/source/lib/init.cxx

@@ -456,12 +456,18 @@ RectangleAndPart RectangleAndPart::Create(const std::string& rPayload)
 
 RectangleAndPart& CallbackFlushHandler::CallbackData::setRectangleAndPart(const std::string& payload)
 {
-    PayloadString = payload;
+    setRectangleAndPart(RectangleAndPart::Create(payload));
 
-    PayloadObject = RectangleAndPart::Create(payload);
+    // Return reference to the cached object.
     return boost::get<RectangleAndPart>(PayloadObject);
 }
 
+void CallbackFlushHandler::CallbackData::setRectangleAndPart(const RectangleAndPart& rRectAndPart)
+{
+    PayloadString = rRectAndPart.toString().getStr();
+    PayloadObject = rRectAndPart;
+}
+
 const RectangleAndPart& CallbackFlushHandler::CallbackData::getRectangleAndPart() const
 {
     assert(PayloadObject.which() == 1);
@@ -477,6 +483,7 @@ boost::property_tree::ptree& CallbackFlushHandler::CallbackData::setJson(const s
     // Let boost normalize the payload so it always matches the cache.
     setJson(aTree);
 
+    // Return reference to the cached object.
     return boost::get<boost::property_tree::ptree>(PayloadObject);
 }
 
@@ -913,7 +920,7 @@ void CallbackFlushHandler::callback(const int type, const char* payload, void* d
 void CallbackFlushHandler::queue(const int type, const char* data)
 {
     CallbackData aCallbackData(type, (data ? data : "(nil)"));
-    std::string& payload = aCallbackData.PayloadString;
+    const std::string& payload = aCallbackData.PayloadString;
     SAL_INFO("lok", "Queue: " << type << " : " << payload);
 
 #ifdef DBG_UTIL
@@ -1202,7 +1209,7 @@ void CallbackFlushHandler::queue(const int type, const char* data)
                     }
                 }
 
-                payload = rcNew.toString().getStr();
+                aCallbackData.setRectangleAndPart(rcNew);
             }
             break;