Bring back dynamic backlog fetching (move scrollbar slider to the very top to get...

[quassel.git] / src / qtui / chatscene.h

diff --git a/src/qtui/chatscene.h b/src/qtui/chatscene.h
index 70605cc..e72308e 100644 (file)
--- a/src/qtui/chatscene.h
+++ b/src/qtui/chatscene.h
@@ -25,8 +25,11 @@
 #include <QGraphicsScene>
 #include <QSet>
 
+#include "types.h"
+
 class AbstractUiMsg;
 class Buffer;
+class BufferId;
 class ChatItem;
 class ChatLine;
 class ColumnHandleItem;
@@ -40,8 +43,12 @@ class ChatScene : public QGraphicsScene {
     ChatScene(QAbstractItemModel *model, const QString &idString, QObject *parent);
     virtual ~ChatScene();
 
-    Buffer *buffer() const;
     inline QAbstractItemModel *model() const { return _model; }
+    inline QString idString() const { return _idString; }
+
+    inline bool isFetchingBacklog() const;
+    inline bool isBacklogFetchingEnabled() const;
+    inline BufferId bufferForBacklogFetching() const;
 
   public slots:
     void setWidth(qreal);
@@ -51,6 +58,9 @@ class ChatScene : public QGraphicsScene {
     ChatItem *selectingItem() const { return _selectingItem; }
     void startGlobalSelection(ChatItem *item, const QPointF &itemPos);
 
+    void setIsFetchingBacklog(bool);
+    inline void setBufferForBacklogFetching(BufferId buffer);
+
   signals:
     void heightChanged(qreal height);
 
@@ -61,6 +71,7 @@ class ChatScene : public QGraphicsScene {
 
   protected slots:
     void rowsInserted(const QModelIndex &, int, int);
+    void modelReset();
 
   private slots:
     void rectChanged(const QRectF &);
@@ -69,6 +80,7 @@ class ChatScene : public QGraphicsScene {
   private:
     void updateSelection(const QPointF &pos);
     QString selectionToString() const;
+    void requestBacklogIfNeeded();
 
     QString _idString;
     qreal _width, _height;
@@ -84,6 +96,27 @@ class ChatScene : public QGraphicsScene {
     int _selectionStart;
     int _selectionEnd;
     bool _isSelecting;
+
+    bool _fetchingBacklog;
+    BufferId _backlogFetchingBuffer;
+    MsgId _lastBacklogOffset;
+    int _lastBacklogSize;
 };
 
+bool ChatScene::isFetchingBacklog() const {
+  return _fetchingBacklog;
+}
+
+bool ChatScene::isBacklogFetchingEnabled() const {
+  return _backlogFetchingBuffer.isValid();
+}
+
+BufferId ChatScene::bufferForBacklogFetching() const {
+  return _backlogFetchingBuffer;
+}
+
+void ChatScene::setBufferForBacklogFetching(BufferId buf) {
+  _backlogFetchingBuffer = buf;
+}
+
 #endif