Fixes #53 last read message indicator

src/messages/layouts/messagelayout.cpp

@@ -145,7 +145,8 @@ void MessageLayout::actuallyLayout(int width, MessageElement::Flags flags)
 }
 
 // Painting
-void MessageLayout::paint(QPainter &painter, int y, int messageIndex, Selection &selection)
+void MessageLayout::paint(QPainter &painter, int y, int messageIndex, Selection &selection,
+                          bool isLastReadMessage, bool isWindowFocused)
 {
     QPixmap *pixmap = this->buffer.get();
     singletons::ThemeManager &themeManager = singletons::ThemeManager::getInstance();
@@ -180,6 +181,16 @@ void MessageLayout::paint(QPainter &painter, int y, int messageIndex, Selection
     // draw gif emotes
     this->container.paintAnimatedElements(painter, y);
 
+    // draw last read message line
+    if (isLastReadMessage) {
+        QColor color = isWindowFocused ? themeManager.tabs.selected.backgrounds.regular.color()
+                                       : themeManager.tabs.selected.backgrounds.unfocused.color();
+
+        QBrush brush = QBrush(color, Qt::VerPattern);
+
+        painter.fillRect(0, y + this->container.getHeight() - 1, this->container.width, 1, brush);
+    }
+
     this->bufferValid = true;
 }
 

src/messages/layouts/messagelayout.hpp

@@ -41,7 +41,8 @@ public:
     bool layout(int width, float scale, MessageElement::Flags flags);
 
     // Painting
-    void paint(QPainter &painter, int y, int messageIndex, Selection &selection);
+    void paint(QPainter &painter, int y, int messageIndex, Selection &selection,
+               bool isLastReadMessage, bool isWindowFocused);
     void invalidateBuffer();
     void deleteBuffer();
 

src/widgets/helper/channelview.cpp

@@ -96,6 +96,9 @@ ChannelView::ChannelView(BaseWidget *parent)
     auto e = new QResizeEvent(this->size(), this->size());
     this->resizeEvent(e);
     delete e;
+
+    singletons::SettingManager::getInstance().showLastMessageIndicator.connect(
+        [this](auto, auto) { this->update(); }, this->managedConnections);
 }
 
 ChannelView::~ChannelView()
@@ -410,6 +413,17 @@ void ChannelView::pause(int msecTimeout)
     this->pauseTimeout.start(msecTimeout);
 }
 
+void ChannelView::updateLastReadMessage()
+{
+    auto _snapshot = this->getMessagesSnapshot();
+
+    if (_snapshot.getLength() > 0) {
+        this->lastReadMessage = _snapshot[_snapshot.getLength() - 1];
+    }
+
+    this->update();
+}
+
 void ChannelView::resizeEvent(QResizeEvent *)
 {
     this->scrollBar.resize(this->scrollBar.width(), height());
@@ -477,11 +491,17 @@ void ChannelView::drawMessages(QPainter &painter)
               (fmod(this->scrollBar.getCurrentValue(), 1)));
 
     messages::MessageLayout *end = nullptr;
+    bool windowFocused = this->window() == QApplication::activeWindow();
 
     for (size_t i = start; i < messagesSnapshot.getLength(); ++i) {
         messages::MessageLayout *layout = messagesSnapshot[i].get();
 
-        layout->paint(painter, y, i, this->selection);
+        bool isLastMessage = false;
+        if (singletons::SettingManager::getInstance().showLastMessageIndicator) {
+            isLastMessage = this->lastReadMessage.get() == layout;
+        }
+
+        layout->paint(painter, y, i, this->selection, isLastMessage, windowFocused);
 
         y += layout->getHeight();
 

src/widgets/helper/channelview.hpp

@@ -39,6 +39,7 @@ public:
     void setEnableScrollingToBottom(bool);
     bool getEnableScrollingToBottom() const;
     void pause(int msecTimeout);
+    void updateLastReadMessage();
 
     void setChannel(SharedChannel channel);
     messages::LimitedQueueSnapshot<messages::MessageLayoutPtr> getMessagesSnapshot();
@@ -72,6 +73,7 @@ private:
     bool messageWasAdded = false;
     bool paused = false;
     QTimer pauseTimeout;
+    messages::MessageLayoutPtr lastReadMessage;
 
     messages::LimitedQueueSnapshot<messages::MessageLayoutPtr> snapshot;
 

src/widgets/settingspages/behaviourpage.cpp

@@ -8,7 +8,7 @@
 
 #define WINDOW_TOPMOST "Window always on top (requires restart)"
 #define INPUT_EMPTY "Hide input box when empty"
-#define LAST_MSG "Show last read message indicator"
+#define LAST_MSG "Show last read message indicator (marks the spot where you left the window)"
 #define PAUSE_HOVERING "When hovering"
 
 #define STREAMLINK_QUALITY "Choose", "Source", "High", "Medium", "Low", "Audio only"

src/widgets/split.cpp

@@ -252,6 +252,11 @@ void Split::updateGifEmotes()
     this->view.queueUpdate();
 }
 
+void Split::updateLastReadMessage()
+{
+    this->view.updateLastReadMessage();
+}
+
 void Split::giveFocus(Qt::FocusReason reason)
 {
     this->input.textInput.setFocus(reason);

src/widgets/split.hpp

@@ -70,6 +70,7 @@ public:
     bool hasFocus() const;
     void layoutMessages();
     void updateGifEmotes();
+    void updateLastReadMessage();
 
     void drag();
 

src/widgets/splitcontainer.cpp

@@ -143,7 +143,7 @@ void SplitContainer::addToLayout(Split *widget, std::pair<int, int> position)
     this->refreshCurrentFocusCoordinates();
 }
 
-const std::vector<Split *> &SplitContainer::getChatWidgets() const
+const std::vector<Split *> &SplitContainer::getSplits() const
 {
     return this->splits;
 }

src/widgets/splitcontainer.hpp

@@ -33,7 +33,7 @@ public:
     std::pair<int, int> removeFromLayout(Split *widget);
     void addToLayout(Split *widget, std::pair<int, int> position = std::pair<int, int>(-1, -1));
 
-    const std::vector<Split *> &getChatWidgets() const;
+    const std::vector<Split *> &getSplits() const;
     NotebookTab *getTab() const;
 
     void addChat(bool openChannelNameDialog = false, std::string chatUUID = std::string());

src/widgets/window.cpp

@@ -107,7 +107,7 @@ void Window::repaintVisibleChatWidgets(Channel *channel)
         return;
     }
 
-    const std::vector<Split *> &widgets = page->getChatWidgets();
+    const std::vector<Split *> &widgets = page->getSplits();
 
     for (auto it = widgets.begin(); it != widgets.end(); ++it) {
         Split *widget = *it;
@@ -140,6 +140,27 @@ void Window::closeEvent(QCloseEvent *)
     this->closed();
 }
 
+bool Window::event(QEvent *e)
+{
+    switch (e->type()) {
+        case QEvent::WindowActivate:
+            break;
+
+        case QEvent::WindowDeactivate: {
+            auto page = this->notebook.getSelectedPage();
+
+            if (page != nullptr) {
+                std::vector<Split *> splits = page->getSplits();
+
+                for (Split *split : splits) {
+                    split->updateLastReadMessage();
+                }
+            }
+        } break;
+    };
+    return BaseWindow::event(e);
+}
+
 void Window::loadGeometry()
 {
     bool doSetGeometry = false;

src/widgets/window.hpp

@@ -57,6 +57,7 @@ public:
 
 protected:
     virtual void closeEvent(QCloseEvent *event) override;
+    virtual bool event(QEvent *event) override;
 
 private:
     singletons::ThemeManager &themeManager;