revert(chatlog): "edit load history when scrolling"

This reverts commit 0a9e72020e.

src/chatlog/chatlog.cpp

@@ -372,7 +372,6 @@ void ChatLog::reposition(int start, int end, qreal deltaY)
 
 void ChatLog::insertChatlineAtBottom(ChatLine::Ptr l)
 {
-    numRemove = 0;
     if (!l.get())
         return;
 
@@ -396,14 +395,9 @@ void ChatLog::insertChatlineAtBottom(ChatLine::Ptr l)
 
 void ChatLog::insertChatlineAtBottom(const QList<ChatLine::Ptr>& newLines)
 {
-    numRemove = 0;
     if (newLines.isEmpty())
         return;
 
-    if (lines.size() + DEF_NUM_MSG_TO_LOAD >= maxMessages) {
-        removeFirsts(DEF_NUM_MSG_TO_LOAD);
-    }
-
     for (ChatLine::Ptr l : newLines) {
         l->setRow(lines.size());
         l->addToScene(scene);
@@ -412,17 +406,11 @@ void ChatLog::insertChatlineAtBottom(const QList<ChatLine::Ptr>& newLines)
     }
 
     layout(lines.last()->getRow(), lines.size(), useableWidth());
-
-    if (visibleLines.size() > 1) {
-        startResizeWorker(visibleLines[1]);
-    } else {
-        startResizeWorker();
-    }
+    startResizeWorker();
 }
 
 void ChatLog::insertChatlineOnTop(ChatLine::Ptr l)
 {
-    numRemove = 0;
     if (!l.get())
         return;
 
@@ -431,7 +419,6 @@ void ChatLog::insertChatlineOnTop(ChatLine::Ptr l)
 
 void ChatLog::insertChatlinesOnTop(const QList<ChatLine::Ptr>& newLines)
 {
-    numRemove = 0;
     if (newLines.isEmpty())
         return;
 
@@ -451,10 +438,6 @@ void ChatLog::insertChatlinesOnTop(const QList<ChatLine::Ptr>& newLines)
         combLines.push_back(l);
     }
 
-    if (lines.size() + DEF_NUM_MSG_TO_LOAD >= maxMessages) {
-        removeLasts(DEF_NUM_MSG_TO_LOAD);
-    }
-
     // add the old lines
     for (ChatLine::Ptr l : lines) {
         l->setRow(i++);
@@ -468,12 +451,7 @@ void ChatLog::insertChatlinesOnTop(const QList<ChatLine::Ptr>& newLines)
     scene->setItemIndexMethod(oldIndexMeth);
 
     // redo layout
-    if (visibleLines.size() > 1) {
-        startResizeWorker(visibleLines[1]);
-    } else {
-        startResizeWorker();
-    }
-
+    startResizeWorker();
 }
 
 bool ChatLog::stickToBottom() const
@@ -487,22 +465,19 @@ void ChatLog::scrollToBottom()
     verticalScrollBar()->setValue(verticalScrollBar()->maximum());
 }
 
-void ChatLog::startResizeWorker(ChatLine::Ptr anchorLine)
+void ChatLog::startResizeWorker()
 {
     if (lines.empty()) {
-        isScroll = true;
         return;
     }
 
     // (re)start the worker
     if (!workerTimer->isActive()) {
         // these values must not be reevaluated while the worker is running
-        if (anchorLine) {
-            workerAnchorLine = anchorLine;
-            workerStb = false;
-        } else {
-            workerStb = stickToBottom();
-        }
+        workerStb = stickToBottom();
+
+        if (!visibleLines.empty())
+            workerAnchorLine = visibleLines.first();
     }
 
     // switch to busy scene displaying the busy notification if there is a lot
@@ -667,13 +642,8 @@ void ChatLog::scrollToLine(ChatLine::Ptr line)
     if (!line.get())
         return;
 
-    if (workerTimer->isActive()) {
-        workerAnchorLine = line;
-        workerStb = false;
-    } else {
-        updateSceneRect();
-        verticalScrollBar()->setValue(line->sceneBoundingRect().top()); // NOTE: start here
-    }
+    updateSceneRect();
+    verticalScrollBar()->setValue(line->sceneBoundingRect().top());
 }
 
 void ChatLog::selectAll()
@@ -717,7 +687,6 @@ void ChatLog::removeFirsts(const int num)
 {
     if (lines.size() > num) {
         lines.erase(lines.begin(), lines.begin()+num);
-        numRemove = num;
     } else {
         lines.clear();
     }
@@ -733,22 +702,11 @@ void ChatLog::removeLasts(const int num)
 {
     if (lines.size() > num) {
         lines.erase(lines.end()-num, lines.end());
-        numRemove = num;
     } else {
         lines.clear();
     }
 }
 
-void ChatLog::setScroll(const bool scroll)
-{
-    isScroll = scroll;
-}
-
-int ChatLog::getNumRemove() const
-{
-    return numRemove;
-}
-
 void ChatLog::forceRelayout()
 {
     startResizeWorker();
@@ -801,7 +759,6 @@ void ChatLog::checkVisibility(bool causedWheelEvent)
     }
 
     if (causedWheelEvent) {
-        qDebug() << "causedWheelEvent";
         if (lowerBound != lines.cend() && lowerBound->get()->row == 0) {
             emit loadHistoryLower();
         } else if (upperBound == lines.cend()) {
@@ -945,7 +902,6 @@ void ChatLog::onWorkerTimeout()
         // hidden during busy screen
         verticalScrollBar()->show();
 
-        isScroll = true;
         emit workerTimeoutFinished();
     }
 }
@@ -1013,10 +969,6 @@ void ChatLog::focusOutEvent(QFocusEvent* ev)
 
 void ChatLog::wheelEvent(QWheelEvent *event)
 {
-    if (!isScroll) {
-        return;
-    }
-
     QGraphicsView::wheelEvent(event);
     checkVisibility(true);
 }

src/chatlog/chatlog.h

@@ -35,7 +35,6 @@ class ChatLineContent;
 struct ToxFile;
 
 static const size_t DEF_NUM_MSG_TO_LOAD = 100;
-
 class ChatLog : public QGraphicsView
 {
     Q_OBJECT
@@ -58,8 +57,6 @@ public:
     void fontChanged(const QFont& font);
     void removeFirsts(const int num);
     void removeLasts(const int num);
-    void setScroll(const bool scroll);
-    int getNumRemove() const;
 
     QString getSelectedText() const;
 
@@ -99,7 +96,7 @@ protected:
     void updateSceneRect();
     void checkVisibility(bool causedWheelEvent = false);
     void scrollToBottom();
-    void startResizeWorker(ChatLine::Ptr anchorLine = nullptr);
+    void startResizeWorker();
 
     void mouseDoubleClickEvent(QMouseEvent* ev) final;
     void mousePressEvent(QMouseEvent* ev) final;
@@ -170,7 +167,6 @@ private:
     int clickCount = 0;
     QPoint lastClickPos;
     Qt::MouseButton lastClickButton;
-    bool isScroll{true};
 
     // worker vars
     int workerLastIndex = 0;
@@ -180,7 +176,4 @@ private:
     // layout
     QMargins margins = QMargins(10, 10, 10, 10);
     qreal lineSpacing = 5.0f;
-
-    int numRemove{0};
-    const int maxMessages{300};
 };

src/model/chathistory.cpp

@@ -96,10 +96,9 @@ ChatHistory::ChatHistory(Friend& f_, History* history_, const ICoreIdHandler& co
 
     // NOTE: this has to be done _after_ sending all sent messages since initial
     // state of the message has to be marked according to our dispatch state
-    constexpr auto defaultNumMessagesToLoad = 100;
-    auto firstChatLogIdx = sessionChatLog.getFirstIdx().get() < defaultNumMessagesToLoad
+    auto firstChatLogIdx = sessionChatLog.getFirstIdx().get() < DEF_NUM_MSG_TO_LOAD
                                ? ChatLogIdx(0)
-                               : sessionChatLog.getFirstIdx() - defaultNumMessagesToLoad;
+                               : sessionChatLog.getFirstIdx() - DEF_NUM_MSG_TO_LOAD;
 
     if (canUseHistory()) {
         loadHistoryIntoSessionChatLog(firstChatLogIdx);

src/model/ichatlog.h

@@ -34,6 +34,8 @@
 
 #include <cassert>
 
+static const auto DEF_NUM_MSG_TO_LOAD = 100;
+
 using ChatLogIdx =
     NamedType<size_t, struct ChatLogIdxTag, Orderable, UnderlyingAddable, UnitlessDifferencable, Incrementable>;
 Q_DECLARE_METATYPE(ChatLogIdx)

src/widget/form/genericchatform.cpp

@@ -53,8 +53,6 @@
 #include <QStringBuilder>
 #include <QtGlobal>
 
-#include <QDebug>
-
 #ifdef SPELL_CHECKING
 #include <KF5/SonnetUi/sonnet/spellcheckdecorator.h>
 #endif
@@ -693,7 +691,6 @@ void GenericChatForm::loadHistory(const QDateTime &time, const LoadHistoryDialog
     if (type == LoadHistoryDialog::from) {
         loadHistoryFrom(time);
         auto msg = messages.cbegin()->second;
-        chatWidget->setScroll(true);
         chatWidget->scrollToLine(msg);
     } else {
         loadHistoryTo(time);
@@ -702,10 +699,15 @@ void GenericChatForm::loadHistory(const QDateTime &time, const LoadHistoryDialog
 
 void GenericChatForm::loadHistoryTo(const QDateTime &time)
 {
-    chatWidget->setScroll(false);
     auto end = chatLog.getFirstIdx();
     if (time.isNull()) {
-        end = messages.begin()->first;
+        if (messages.size() + DEF_NUM_MSG_TO_LOAD >= maxMessages) {
+            end = ChatLogIdx(messages.rbegin()->first.get() - DEF_NUM_MSG_TO_LOAD);
+            chatWidget->removeLasts(DEF_NUM_MSG_TO_LOAD);
+            removeLastsMessages(DEF_NUM_MSG_TO_LOAD);
+        } else {
+            end = messages.begin()->first;
+        }
     } else {
         end = firstItemAfterDate(time.date(), chatLog);
     }
@@ -715,27 +717,28 @@ void GenericChatForm::loadHistoryTo(const QDateTime &time)
         begin = end - DEF_NUM_MSG_TO_LOAD;
     }
 
-    if (begin != end) {
-        renderMessages(begin, end);
-    } else {
-        chatWidget->setScroll(true);
-    }
+    renderMessages(begin, end);
 }
 
 void GenericChatForm::loadHistoryFrom(const QDateTime &time)
 {
-    chatWidget->setScroll(false);
     auto begin = chatLog.getFirstIdx();
     if (time.isNull()) {
-        begin = messages.rbegin()->first;
+        if (messages.size() + DEF_NUM_MSG_TO_LOAD >= maxMessages) {
+            begin = ChatLogIdx(messages.rbegin()->first.get() + DEF_NUM_MSG_TO_LOAD);
+            chatWidget->removeFirsts(DEF_NUM_MSG_TO_LOAD);
+            removeFirstsMessages(DEF_NUM_MSG_TO_LOAD);
+        } else {
+            begin = messages.rbegin()->first;
+        }
+
     } else {
         begin = firstItemAfterDate(time.date(), chatLog);
     }
 
     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();
+        add = chatLog.getNextIdx().get() - (begin.get() + DEF_NUM_MSG_TO_LOAD);
     }
     auto end = ChatLogIdx(begin.get() + add);
     renderMessages(begin, end);
@@ -1070,6 +1073,10 @@ void GenericChatForm::renderItem(const ChatLogItem& item, bool hideName, bool co
 
 void GenericChatForm::renderMessage(ChatLogIdx idx)
 {
+    if (chatWidget->getLines().size() >= maxMessages) {
+        chatWidget->removeFirsts(optimalRemove);
+        removeFirstsMessages(optimalRemove);
+    }
     renderMessages(idx, idx + 1);
 }
 
@@ -1096,13 +1103,8 @@ void GenericChatForm::renderMessages(ChatLogIdx begin, ChatLogIdx end,
         }
     }
 
-    if (beforeLines.isEmpty() && afterLines.isEmpty()) {
-        chatWidget->setScroll(true);
-    }
-
-    chatWidget->insertChatlineAtBottom(afterLines);
-    if (chatWidget->getNumRemove()) {
-        removeFirstsMessages(chatWidget->getNumRemove());
+    for (auto const& line : afterLines) {
+        chatWidget->insertChatlineAtBottom(line);
     }
 
     if (!beforeLines.empty()) {
@@ -1119,9 +1121,6 @@ void GenericChatForm::renderMessages(ChatLogIdx begin, ChatLogIdx end,
         }
 
         chatWidget->insertChatlinesOnTop(beforeLines);
-        if (chatWidget->getNumRemove()) {
-            removeLastsMessages(chatWidget->getNumRemove());
-        }
     } else if (onCompletion) {
         onCompletion();
     }

src/widget/form/genericchatform.h

@@ -192,4 +192,8 @@ protected:
     SearchPos searchPos;
     std::map<ChatLogIdx, ChatMessage::Ptr> messages;
     bool colorizeNames = false;
+
+private:
+    const int maxMessages{300};
+    const int optimalRemove{50};
 };