revert(chatlog): "feat: load messages from the database before date"

This reverts commit fb2957c5ee.

src/chatlog/chatlog.cpp

@@ -668,7 +668,7 @@ void ChatLog::forceRelayout()
     startResizeWorker();
 }
 
-void ChatLog::checkVisibility(bool causedByScroll)
+void ChatLog::checkVisibility()
 {
     if (lines.empty())
         return;
@@ -712,16 +712,12 @@ void ChatLog::checkVisibility(bool causedByScroll)
     if (!visibleLines.isEmpty()) {
         emit firstVisibleLineChanged(lastLineBeforeVisible, visibleLines.at(0));
     }
-
-    if (causedByScroll && lowerBound != lines.cend() && lowerBound->get()->row == 0) {
-        emit loadHistoryLower();
-    }
 }
 
 void ChatLog::scrollContentsBy(int dx, int dy)
 {
     QGraphicsView::scrollContentsBy(dx, dy);
-    checkVisibility(true);
+    checkVisibility();
 }
 
 void ChatLog::resizeEvent(QResizeEvent* ev)

src/chatlog/chatlog.h

@@ -66,7 +66,6 @@ signals:
     void selectionChanged();
     void workerTimeoutFinished();
     void firstVisibleLineChanged(const ChatLine::Ptr& prevLine, const ChatLine::Ptr& firstLine);
-    void loadHistoryLower();
 
 public slots:
     void forceRelayout();
@@ -90,7 +89,7 @@ protected:
 
     void reposition(int start, int end, qreal deltaY);
     void updateSceneRect();
-    void checkVisibility(bool causedByScroll = false);
+    void checkVisibility();
     void scrollToBottom();
     void startResizeWorker();
 

src/widget/form/genericchatform.cpp

@@ -342,7 +342,6 @@ GenericChatForm::GenericChatForm(const Core& _core, const Contact* contact, ICha
     connect(chatWidget, &ChatLog::customContextMenuRequested, this,
             &GenericChatForm::onChatContextMenuRequested);
     connect(chatWidget, &ChatLog::firstVisibleLineChanged, this, &GenericChatForm::updateShowDateInfo);
-    connect(chatWidget, &ChatLog::loadHistoryLower, this, &GenericChatForm::loadHistoryLower);
 
     connect(searchForm, &SearchForm::searchInBegin, this, &GenericChatForm::searchInBegin);
     connect(searchForm, &SearchForm::searchUp, this, &GenericChatForm::onSearchUp);
@@ -1028,19 +1027,6 @@ void GenericChatForm::renderMessages(ChatLogIdx begin, ChatLogIdx end,
     }
 }
 
-void GenericChatForm::loadHistoryLower()
-{
-    auto begin = messages.begin()->first;
-
-    if (begin.get() > 100) {
-        begin = ChatLogIdx(begin.get() - 100);
-    } else {
-        begin = ChatLogIdx(0);
-    }
-
-    renderMessages(begin, chatLog.getNextIdx());
-}
-
 void GenericChatForm::updateShowDateInfo(const ChatLine::Ptr& prevLine, const ChatLine::Ptr& topLine)
 {
     // If the dateInfo is visible we need to pretend the top line is the one

src/widget/form/genericchatform.h

@@ -119,8 +119,6 @@ protected slots:
     void renderMessages(ChatLogIdx begin, ChatLogIdx end,
                         std::function<void(void)> onCompletion = std::function<void(void)>());
 
-    void loadHistoryLower();
-
 private:
     void retranslateUi();
     void addSystemDateMessage(const QDate& date);