From fd90abd3f3baa4fc98fa7e3df0e22e9bd3d77d95 Mon Sep 17 00:00:00 2001
From: Manuel Nickschas <sputnick@quassel-irc.org>
Date: Wed, 13 Aug 2008 12:23:30 +0200
Subject: [PATCH] Correctly handle selections while new ChatLines are being
 inserted

This should fix most selection-based crashes. Had one caused by something else,
but couldn't reproduce yet. Backtraces welcome :)
---
 src/qtui/chatscene.cpp | 12 +++++++++---
 src/qtui/chatscene.h   |  3 +--
 2 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/src/qtui/chatscene.cpp b/src/qtui/chatscene.cpp
index 7ba7d392..e04784c9 100644
--- a/src/qtui/chatscene.cpp
+++ b/src/qtui/chatscene.cpp
@@ -44,7 +44,6 @@ ChatScene::ChatScene(QAbstractItemModel *model, const QString &idString, QObject
     _model(model),
     _singleBufferScene(false),
     _selectingItem(0),
-    _lastItem(0),
     _selectionStart(-1),
     _isSelecting(false),
     _fetchingBacklog(false)
@@ -113,6 +112,15 @@ void ChatScene::rowsInserted(const QModelIndex &index, int start, int end) {
     _lines[i]->setRow(i);
   }
 
+  // update selection
+  if(_selectionStart >= 0) {
+    int offset = end - start + 1;
+    if(_selectionStart >= start) _selectionStart += offset;
+    if(_selectionEnd >= start) _selectionEnd += offset;
+    if(_firstSelectionRow >= start) _firstSelectionRow += offset;
+    if(_lastSelectionRow >= start) _lastSelectionRow += offset;
+  }
+
   if(h > 0) {
     _height += h;
     for(int i = end+1; i < _lines.count(); i++) {
@@ -205,10 +213,8 @@ void ChatScene::updateSelection(const QPointF &pos) {
       _lines[l]->setSelected(true, minColumn);
     }
   }
-
   int newstart = qMin(curRow, _firstSelectionRow);
   int newend = qMax(curRow, _firstSelectionRow);
-
   if(newstart < _selectionStart) {
     for(int l = newstart; l < _selectionStart; l++)
       _lines[l]->setSelected(true, minColumn);
diff --git a/src/qtui/chatscene.h b/src/qtui/chatscene.h
index 17c009c8..1dae1e22 100644
--- a/src/qtui/chatscene.h
+++ b/src/qtui/chatscene.h
@@ -92,8 +92,7 @@ class ChatScene : public QGraphicsScene {
     ColumnHandleItem *firstColHandle, *secondColHandle;
     qreal firstColHandlePos, secondColHandlePos;
 
-    ChatItem *_selectingItem, *_lastItem;
-    QSet<ChatLine *> _selectedItems;
+    ChatItem *_selectingItem;
     int _selectionStartCol, _selectionMinCol;
     int _selectionStart;
     int _selectionEnd;
-- 
2.20.1