+ h += line->height();
+ _lines.insert(i, line);
+ addItem(line);
+ }
+ }
+
+ // update existing items
+ for(int i = end+1; i < _lines.count(); i++) {
+ _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;
+ }
+
+ // neither pre- or append means we have to do dirty work: move items...
+ if(!(atTop || atBottom)) {
+ qreal offset = h;
+ int moveStart = 0;
+ int moveEnd = _lines.count() - 1;
+ // move top means: moving 0 to end (aka: end + 1)
+ // move top means: moving end + 1 to _lines.count() - 1 (aka: _lines.count() - (end + 1)
+ if(end + 1 < _lines.count() - end - 1) {
+ // move top part
+ moveTop = true;
+ offset = -offset;
+ moveEnd = end;
+ } else {
+ // move bottom part
+ moveStart = end + 1;
+ }
+ ChatLine *line = 0;
+ for(int i = moveStart; i <= moveEnd; i++) {
+ line = _lines.at(i);
+ line->setPos(0, line->pos().y() + offset);
+ }
+ }
+
+ // check if all went right
+ Q_ASSERT(start == 0 || _lines.at(start - 1)->pos().y() + _lines.at(start - 1)->height() == _lines.at(start)->pos().y());
+ Q_ASSERT(end + 1 == _lines.count() || _lines.at(end)->pos().y() + _lines.at(end)->height() == _lines.at(end + 1)->pos().y());
+
+ if(!atBottom) {
+ if(start < _firstLineRow) {
+ int prevFirstLineRow = _firstLineRow + (end - start + 1);
+ for(int i = end + 1; i < prevFirstLineRow; i++) {
+ _lines.at(i)->show();
+ }
+ }
+ // force new search for first proper line
+ _firstLineRow = -1;
+ }
+ updateSceneRect();
+ if(atBottom || (!atTop && !moveTop)) {
+ emit lastLineChanged(_lines.last(), h);
+ }
+}
+
+void ChatScene::rowsAboutToBeRemoved(const QModelIndex &parent, int start, int end) {
+ Q_UNUSED(parent);
+
+ qreal h = 0; // total height of removed items;
+
+ bool atTop = (start == 0);
+ bool atBottom = (end == _lines.count() - 1);
+ bool moveTop = false;
+
+ // remove items from scene
+ QList<ChatLine *>::iterator lineIter = _lines.begin() + start;
+ int lineCount = start;
+ while(lineIter != _lines.end() && lineCount <= end) {
+ h += (*lineIter)->height();
+ delete *lineIter;
+ lineIter = _lines.erase(lineIter);
+ lineCount++;
+ }
+
+ // update rows of remaining chatlines
+ for(int i = start; i < _lines.count(); i++) {
+ _lines.at(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;
+ }
+
+ // neither removing at bottom or top means we have to move items...
+ if(!(atTop || atBottom)) {
+ qreal offset = h;
+ int moveStart = 0;
+ int moveEnd = _lines.count() - 1;
+ if(start < _lines.count() - start) {
+ // move top part
+ moveTop = true;
+ moveEnd = start - 1;
+ } else {
+ // move bottom part
+ moveStart = start;
+ offset = -offset;
+ }
+ ChatLine *line = 0;
+ for(int i = moveStart; i <= moveEnd; i++) {
+ line = _lines.at(i);
+ line->setPos(0, line->pos().y() + offset);
+ }
+ }
+
+ Q_ASSERT(start == 0 || start >= _lines.count() || _lines.at(start - 1)->pos().y() + _lines.at(start - 1)->height() == _lines.at(start)->pos().y());
+
+ // update sceneRect
+ // when searching for the first non-date-line we have to take into account that our
+ // model still contains the just removed lines so we cannot simply call updateSceneRect()
+ int numRows = model()->rowCount();
+ QModelIndex firstLineIdx;
+ _firstLineRow = -1;
+ bool needOffset = false;
+ do {
+ _firstLineRow++;
+ if(_firstLineRow >= start && _firstLineRow <= end) {
+ _firstLineRow = end + 1;
+ needOffset = true;
+ }
+ firstLineIdx = model()->index(_firstLineRow, 0);
+ } while((Message::Type)(model()->data(firstLineIdx, MessageModel::TypeRole).toInt()) == Message::DayChange && _firstLineRow < numRows);
+
+ if(needOffset)
+ _firstLineRow -= end - start + 1;
+ updateSceneRect();
+}
+
+void ChatScene::updateForViewport(qreal width, qreal height) {
+ _viewportHeight = height;
+ setWidth(width);
+}
+
+void ChatScene::setWidth(qreal width) {
+ if(width == _sceneRect.width())
+ return;
+
+ // clock_t startT = clock();
+
+ // disabling the index while doing this complex updates is about
+ // 2 to 10 times faster!
+ setItemIndexMethod(QGraphicsScene::NoIndex);
+
+ QList<ChatLine *>::iterator lineIter = _lines.end();
+ QList<ChatLine *>::iterator lineIterBegin = _lines.begin();
+ qreal linePos = _sceneRect.y() + _sceneRect.height();
+ qreal contentsWidth = width - secondColumnHandle()->sceneRight();
+ while(lineIter != lineIterBegin) {
+ lineIter--;
+ (*lineIter)->setGeometryByWidth(width, contentsWidth, linePos);
+ }
+ setItemIndexMethod(QGraphicsScene::BspTreeIndex);
+
+ updateSceneRect(width);
+ setHandleXLimits();
+
+// clock_t endT = clock();
+// qDebug() << "resized" << _lines.count() << "in" << (float)(endT - startT) / CLOCKS_PER_SEC << "sec";
+}
+
+void ChatScene::firstHandlePositionChanged(qreal xpos) {
+ if(_firstColHandlePos == xpos)
+ return;
+
+ _firstColHandlePos = xpos;
+ ChatViewSettings viewSettings(this);
+ viewSettings.setValue("FirstColumnHandlePos", _firstColHandlePos);
+ ChatViewSettings defaultSettings;
+ defaultSettings.setValue("FirstColumnHandlePos", _firstColHandlePos);
+
+ // clock_t startT = clock();
+
+ // disabling the index while doing this complex updates is about
+ // 2 to 10 times faster!
+ setItemIndexMethod(QGraphicsScene::NoIndex);
+
+ QList<ChatLine *>::iterator lineIter = _lines.end();
+ QList<ChatLine *>::iterator lineIterBegin = _lines.begin();
+ qreal timestampWidth = firstColumnHandle()->sceneLeft();
+ qreal senderWidth = secondColumnHandle()->sceneLeft() - firstColumnHandle()->sceneRight();
+ QPointF senderPos(firstColumnHandle()->sceneRight(), 0);
+
+ while(lineIter != lineIterBegin) {
+ lineIter--;
+ (*lineIter)->setFirstColumn(timestampWidth, senderWidth, senderPos);
+ }
+ setItemIndexMethod(QGraphicsScene::BspTreeIndex);
+
+ setHandleXLimits();
+
+// clock_t endT = clock();
+// qDebug() << "resized" << _lines.count() << "in" << (float)(endT - startT) / CLOCKS_PER_SEC << "sec";
+}
+
+void ChatScene::secondHandlePositionChanged(qreal xpos) {
+ if(_secondColHandlePos == xpos)
+ return;
+
+ _secondColHandlePos = xpos;
+ ChatViewSettings viewSettings(this);
+ viewSettings.setValue("SecondColumnHandlePos", _secondColHandlePos);
+ ChatViewSettings defaultSettings;
+ defaultSettings.setValue("SecondColumnHandlePos", _secondColHandlePos);
+
+ // clock_t startT = clock();
+
+ // disabling the index while doing this complex updates is about
+ // 2 to 10 times faster!
+ setItemIndexMethod(QGraphicsScene::NoIndex);
+
+ QList<ChatLine *>::iterator lineIter = _lines.end();
+ QList<ChatLine *>::iterator lineIterBegin = _lines.begin();
+ qreal linePos = _sceneRect.y() + _sceneRect.height();
+ qreal senderWidth = secondColumnHandle()->sceneLeft() - firstColumnHandle()->sceneRight();
+ qreal contentsWidth = _sceneRect.width() - secondColumnHandle()->sceneRight();
+ QPointF contentsPos(secondColumnHandle()->sceneRight(), 0);
+ while(lineIter != lineIterBegin) {
+ lineIter--;
+ (*lineIter)->setSecondColumn(senderWidth, contentsWidth, contentsPos, linePos);
+ }
+ setItemIndexMethod(QGraphicsScene::BspTreeIndex);
+
+ setHandleXLimits();
+
+// clock_t endT = clock();
+// qDebug() << "resized" << _lines.count() << "in" << (float)(endT - startT) / CLOCKS_PER_SEC << "sec";
+}
+
+void ChatScene::setHandleXLimits() {
+ _firstColHandle->setXLimits(0, _secondColHandle->sceneLeft());
+ _secondColHandle->setXLimits(_firstColHandle->sceneRight(), width() - minContentsWidth);
+}
+
+void ChatScene::setSelectingItem(ChatItem *item) {
+ if(_selectingItem) _selectingItem->clearSelection();
+ _selectingItem = item;
+}
+
+void ChatScene::startGlobalSelection(ChatItem *item, const QPointF &itemPos) {
+ _selectionStart = _selectionEnd = _lastSelectionRow = _firstSelectionRow = item->row();
+ _selectionStartCol = _selectionMinCol = item->column();
+ _isSelecting = true;
+ _lines[_selectionStart]->setSelected(true, (ChatLineModel::ColumnType)_selectionMinCol);
+ updateSelection(item->mapToScene(itemPos));
+}
+
+void ChatScene::updateSelection(const QPointF &pos) {
+ // This is somewhat hacky... we look at the contents item that is at the cursor's y position (ignoring x), since
+ // it has the full height. From this item, we can then determine the row index and hence the ChatLine.
+ ChatItem *contentItem = static_cast<ChatItem *>(itemAt(QPointF(_secondColHandle->sceneRight() + 1, pos.y())));
+ if(!contentItem) return;
+
+ int curRow = contentItem->row();
+ int curColumn;
+ if(pos.x() > _secondColHandle->sceneRight()) curColumn = ChatLineModel::ContentsColumn;
+ else if(pos.x() > _firstColHandlePos) curColumn = ChatLineModel::SenderColumn;
+ else curColumn = ChatLineModel::TimestampColumn;
+
+ ChatLineModel::ColumnType minColumn = (ChatLineModel::ColumnType)qMin(curColumn, _selectionStartCol);
+ if(minColumn != _selectionMinCol) {
+ _selectionMinCol = minColumn;
+ for(int l = qMin(_selectionStart, _selectionEnd); l <= qMax(_selectionStart, _selectionEnd); l++) {
+ _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);
+ }
+ if(newstart > _selectionStart) {
+ for(int l = _selectionStart; l < newstart; l++)
+ _lines[l]->setSelected(false);
+ }
+ if(newend > _selectionEnd) {
+ for(int l = _selectionEnd+1; l <= newend; l++)
+ _lines[l]->setSelected(true, minColumn);
+ }
+ if(newend < _selectionEnd) {
+ for(int l = newend+1; l <= _selectionEnd; l++)
+ _lines[l]->setSelected(false);
+ }
+
+ _selectionStart = newstart;
+ _selectionEnd = newend;
+ _lastSelectionRow = curRow;
+
+ if(newstart == newend && minColumn == ChatLineModel::ContentsColumn) {
+ if(!_selectingItem) {
+ qWarning() << "WARNING: ChatScene::updateSelection() has a null _selectingItem, this should never happen! Please report.";
+ return;
+ }
+ _lines[curRow]->setSelected(false);
+ _isSelecting = false;
+ _selectingItem->continueSelecting(_selectingItem->mapFromScene(pos));
+ }
+}
+
+void ChatScene::mouseMoveEvent(QGraphicsSceneMouseEvent *event) {
+ if(_isSelecting && event->buttons() == Qt::LeftButton) {
+ updateSelection(event->scenePos());
+ event->accept();
+ } else {
+ QGraphicsScene::mouseMoveEvent(event);
+ }
+}
+
+void ChatScene::mousePressEvent(QGraphicsSceneMouseEvent *event) {
+ if(event->buttons() == Qt::LeftButton && _selectionStart >= 0) {
+ for(int l = qMin(_selectionStart, _selectionEnd); l <= qMax(_selectionStart, _selectionEnd); l++) {
+ _lines[l]->setSelected(false);
+ }
+ _selectionStart = -1;
+ QGraphicsScene::mousePressEvent(event); // so we can start a new local selection
+ } else {
+ QGraphicsScene::mousePressEvent(event);
+ }
+}
+
+void ChatScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *event) {
+ if(_isSelecting && !event->buttons() & Qt::LeftButton) {
+ putToClipboard(selectionToString());
+ _isSelecting = false;
+ event->accept();
+ } else {
+ QGraphicsScene::mouseReleaseEvent(event);
+ }
+}
+
+void ChatScene::putToClipboard(const QString &selection) {
+ // TODO Configure clipboards
+# ifdef Q_WS_X11
+ QApplication::clipboard()->setText(selection, QClipboard::Selection);
+# endif
+//# else
+ QApplication::clipboard()->setText(selection);
+//# endif
+}
+
+//!\brief Convert current selection to human-readable string.
+QString ChatScene::selectionToString() const {
+ //TODO Make selection format configurable!
+ if(!_isSelecting) return QString();
+ int start = qMin(_selectionStart, _selectionEnd);
+ int end = qMax(_selectionStart, _selectionEnd);
+ if(start < 0 || end >= _lines.count()) {
+ qDebug() << "Invalid selection range:" << start << end;
+ return QString();
+ }
+ QString result;
+ for(int l = start; l <= end; l++) {
+ if(_selectionMinCol == ChatLineModel::TimestampColumn)
+ result += _lines[l]->item(ChatLineModel::TimestampColumn).data(MessageModel::DisplayRole).toString() + " ";
+ if(_selectionMinCol <= ChatLineModel::SenderColumn)
+ result += _lines[l]->item(ChatLineModel::SenderColumn).data(MessageModel::DisplayRole).toString() + " ";
+ result += _lines[l]->item(ChatLineModel::ContentsColumn).data(MessageModel::DisplayRole).toString() + "\n";
+ }
+ return result;
+}
+
+void ChatScene::requestBacklog() {
+ static const int REQUEST_COUNT = 500;
+ int backlogSize = model()->rowCount();
+ if(isSingleBufferScene() && backlogSize != 0 && _lastBacklogSize + REQUEST_COUNT <= backlogSize) {
+ QModelIndex msgIdx = model()->index(0, 0);
+ while((Message::Type)(model()->data(msgIdx, ChatLineModel::TypeRole).toInt()) == Message::DayChange) {
+ msgIdx = msgIdx.sibling(msgIdx.row() + 1, 0);