feat: show date in chat log

src/chatlog/chatlog.cpp

@@ -700,6 +700,10 @@ void ChatLog::checkVisibility()
     // if (!visibleLines.empty())
     //  qDebug() << "visible from " << visibleLines.first()->getRow() << "to " <<
     //  visibleLines.last()->getRow() << " total " << visibleLines.size();
+
+    if (!visibleLines.isEmpty()) {
+        emit firstVisibleLineChanged(visibleLines.at(0));
+    }
 }
 
 void ChatLog::scrollContentsBy(int dx, int dy)

src/chatlog/chatlog.h

@@ -69,6 +69,7 @@ public:
 signals:
     void selectionChanged();
     void workerTimeoutFinished();
+    void firstVisibleLineChanged(const ChatLine::Ptr&);
 
 public slots:
     void forceRelayout();

src/widget/form/genericchatform.cpp

@@ -137,9 +137,12 @@ GenericChatForm::GenericChatForm(const Contact* contact, QWidget* parent)
     curRow = 0;
     headWidget = new ChatFormHeader();
     searchForm = new SearchForm();
+    dateInfo = new QLabel(this);
     chatWidget = new ChatLog(this);
     chatWidget->setBusyNotification(ChatMessage::createBusyNotification());
     searchForm->hide();
+    dateInfo->setAlignment(Qt::AlignHCenter);
+    dateInfo->setVisible(false);
 
     // settings
     const Settings& s = Settings::getInstance();
@@ -199,6 +202,7 @@ GenericChatForm::GenericChatForm(const Contact* contact, QWidget* parent)
 
     QVBoxLayout* contentLayout = new QVBoxLayout(contentWidget);
     contentLayout->addWidget(searchForm);
+    contentLayout->addWidget(dateInfo);
     contentLayout->addWidget(chatWidget);
     contentLayout->addLayout(mainFootLayout);
 
@@ -228,6 +232,7 @@ GenericChatForm::GenericChatForm(const Contact* contact, QWidget* parent)
 
     connect(chatWidget, &ChatLog::customContextMenuRequested, this,
             &GenericChatForm::onChatContextMenuRequested);
+    connect(chatWidget, &ChatLog::firstVisibleLineChanged, this, &GenericChatForm::updateShowDateInfo);
 
     connect(searchForm, &SearchForm::searchInBegin, this, &GenericChatForm::searchInBegin);
     connect(searchForm, &SearchForm::searchUp, this, &GenericChatForm::onSearchUp);
@@ -977,6 +982,19 @@ void GenericChatForm::onSearchTriggered()
     }
 }
 
+void GenericChatForm::updateShowDateInfo(const ChatLine::Ptr& line)
+{
+    const auto date = getDate(line);
+
+    if (date.isValid() && date != QDate::currentDate()) {
+        const auto dateText = QStringLiteral("<b>%1<\b>").arg(date.toString(Settings::getInstance().getDateFormat()));
+        dateInfo->setText(dateText);
+        dateInfo->setVisible(true);
+    } else {
+        dateInfo->setVisible(false);
+    }
+}
+
 void GenericChatForm::onContinueSearch()
 {
     const QString phrase = searchForm->getSearchPhrase();

src/widget/form/genericchatform.h

@@ -114,6 +114,7 @@ protected slots:
     void copyLink();
     void searchFormShow();
     void onSearchTriggered();
+    void updateShowDateInfo(const ChatLine::Ptr& line);
 
     virtual void searchInBegin(const QString& phrase, const ParameterSearch& parameter) = 0;
     virtual void onSearchUp(const QString& phrase, const ParameterSearch& parameter) = 0;
@@ -173,6 +174,7 @@ protected:
     ChatFormHeader* headWidget;
 
     SearchForm *searchForm;
+    QLabel *dateInfo;
     ChatLog* chatWidget;
     ChatTextEdit* msgEdit;
 #ifdef SPELL_CHECKING