revert(chatlog): "prohibition to remove messages in group chat"

This reverts commit 5aeac56b76.

src/chatlog/chatlog.cpp

@@ -400,7 +400,7 @@ void ChatLog::insertChatlineAtBottom(const QList<ChatLine::Ptr>& newLines)
     if (newLines.isEmpty())
         return;
 
-    if (lines.size() + static_cast<int>(DEF_NUM_MSG_TO_LOAD) >= maxMessages) {
+    if (lines.size() + DEF_NUM_MSG_TO_LOAD >= maxMessages) {
         removeFirsts(DEF_NUM_MSG_TO_LOAD);
     }
 
@@ -451,7 +451,7 @@ void ChatLog::insertChatlinesOnTop(const QList<ChatLine::Ptr>& newLines)
         combLines.push_back(l);
     }
 
-    if (lines.size() + static_cast<int>(DEF_NUM_MSG_TO_LOAD) >= maxMessages) {
+    if (lines.size() + DEF_NUM_MSG_TO_LOAD >= maxMessages) {
         removeLasts(DEF_NUM_MSG_TO_LOAD);
     }
 
@@ -801,6 +801,7 @@ void ChatLog::checkVisibility(bool causedWheelEvent)
     }
 
     if (causedWheelEvent) {
+        qDebug() << "causedWheelEvent";
         if (lowerBound != lines.cend() && lowerBound->get()->row == 0) {
             emit loadHistoryLower();
         } else if (upperBound == lines.cend()) {

src/model/contact.h

@@ -36,8 +36,6 @@ public:
     virtual void setEventFlag(bool flag) = 0;
     virtual bool getEventFlag() const = 0;
 
-    virtual bool useHistory() const = 0; // TODO: remove after added history in group chat
-
 signals:
     void displayedNameChanged(const QString& newName);
 };

src/model/friend.cpp

@@ -192,9 +192,6 @@ Status::Status Friend::getStatus() const
     return isNegotiating ? Status::Status::Negotiating : friendStatus;
 }
 
-bool Friend::useHistory() const
-{
-    return true;
 }
 
 void Friend::setExtendedMessageSupport(bool supported)
@@ -225,5 +222,4 @@ void Friend::onNegotiationComplete() {
 
     if (Status::isOnline(getStatus())) {
         emit onlineOfflineChanged(friendPk, true);
-    }
-}
+    }

src/model/group.cpp

@@ -202,7 +202,4 @@ QString Group::getSelfName() const
     return selfName;
 }
 
-bool Group::useHistory() const
-{
-    return false;
 }

src/model/group.h

@@ -61,7 +61,6 @@ public:
     QString getSelfName() const;
 
     bool useHistory() const final;
-
 signals:
     void titleChangedByUser(const QString& title);
     void titleChanged(const QString& author, const QString& title);

src/widget/form/genericchatform.cpp

@@ -734,6 +734,7 @@ void GenericChatForm::loadHistoryFrom(const QDateTime &time)
 
     int add = DEF_NUM_MSG_TO_LOAD;
     if (begin.get() + DEF_NUM_MSG_TO_LOAD > chatLog.getNextIdx().get()) {
+        auto aTest = chatLog.getNextIdx().get();
         add = chatLog.getNextIdx().get() - begin.get();
     }
     auto end = ChatLogIdx(begin.get() + add);