+QTextLayout *ChatItem::createLayout(QTextOption::WrapMode wrapMode, Qt::Alignment alignment) {
+ QTextLayout *layout = new QTextLayout(data(MessageModel::DisplayRole).toString());
+
+ QTextOption option;
+ option.setWrapMode(wrapMode);
+ option.setAlignment(alignment);
+ layout->setTextOption(option);
+
+ QList<QTextLayout::FormatRange> formatRanges
+ = QtUi::style()->toTextLayoutList(data(MessageModel::FormatRole).value<UiStyle::FormatList>(), layout->text().length());
+ layout->setAdditionalFormats(formatRanges);
+ return layout;
+}
+
+void ChatItem::updateLayout() {
+ if(!haveLayout())
+ setLayout(createLayout(QTextOption::WrapAnywhere, Qt::AlignLeft));
+
+ layout()->beginLayout();
+ QTextLine line = layout()->createLine();
+ if(line.isValid()) {
+ line.setLineWidth(width());
+ line.setPosition(QPointF(0,0));
+ }
+ layout()->endLayout();
+}
+
+void ChatItem::clearLayout() {
+ delete _layout;
+ _layout = 0;
+}
+
+// NOTE: This is not the most time-efficient implementation, but it saves space by not caching unnecessary data
+// This is a deliberate trade-off. (-> selectFmt creation, data() call)
+void ChatItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) {
+ Q_UNUSED(option); Q_UNUSED(widget);
+ if(!haveLayout()) updateLayout();
+ painter->setClipRect(boundingRect()); // no idea why QGraphicsItem clipping won't work
+ //if(_selectionMode == FullSelection) {
+ //painter->save();
+ //painter->fillRect(boundingRect(), QApplication::palette().brush(QPalette::Highlight));
+ //painter->restore();
+ //}
+ QVector<QTextLayout::FormatRange> formats = additionalFormats();
+ if(_selectionMode != NoSelection) {
+ QTextLayout::FormatRange selectFmt;
+ selectFmt.format.setForeground(QApplication::palette().brush(QPalette::HighlightedText));
+ selectFmt.format.setBackground(QApplication::palette().brush(QPalette::Highlight));
+ if(_selectionMode == PartialSelection) {
+ selectFmt.start = qMin(_selectionStart, _selectionEnd);
+ selectFmt.length = qAbs(_selectionStart - _selectionEnd);
+ } else { // FullSelection
+ selectFmt.start = 0;
+ selectFmt.length = data(MessageModel::DisplayRole).toString().length();
+ }
+ formats.append(selectFmt);
+ }
+ layout()->draw(painter, QPointF(0,0), formats, boundingRect());
+}
+
+qint16 ChatItem::posToCursor(const QPointF &pos) {
+ if(pos.y() > height()) return data(MessageModel::DisplayRole).toString().length();
+ if(pos.y() < 0) return 0;
+ if(!haveLayout()) updateLayout();
+ for(int l = layout()->lineCount() - 1; l >= 0; l--) {
+ QTextLine line = layout()->lineAt(l);
+ if(pos.y() >= line.y()) {
+ return line.xToCursor(pos.x(), QTextLine::CursorOnCharacter);
+ }
+ }
+ return 0;
+}
+
+void ChatItem::setFullSelection() {
+ if(_selectionMode != FullSelection) {
+ _selectionMode = FullSelection;
+ update();
+ }
+}
+
+void ChatItem::clearSelection() {
+ _selectionMode = NoSelection;
+ update();
+}
+
+void ChatItem::continueSelecting(const QPointF &pos) {
+ _selectionMode = PartialSelection;
+ _selectionEnd = posToCursor(pos);
+ update();
+}
+
+QList<QRectF> ChatItem::findWords(const QString &searchWord, Qt::CaseSensitivity caseSensitive) {
+ QList<QRectF> resultList;
+ const QAbstractItemModel *model_ = model();
+ if(!model_)
+ return resultList;
+
+ QString plainText = model_->data(model_->index(row(), column()), MessageModel::DisplayRole).toString();
+ QList<int> indexList;
+ int searchIdx = plainText.indexOf(searchWord, 0, caseSensitive);
+ while(searchIdx != -1) {
+ indexList << searchIdx;
+ searchIdx = plainText.indexOf(searchWord, searchIdx + 1, caseSensitive);
+ }
+
+ if(!haveLayout())
+ updateLayout();
+
+ foreach(int idx, indexList) {
+ QTextLine line = layout()->lineForTextPosition(idx);
+ qreal x = line.cursorToX(idx);
+ qreal width = line.cursorToX(idx + searchWord.count()) - x;
+ qreal height = fontMetrics()->lineSpacing();
+ qreal y = height * line.lineNumber();
+ resultList << QRectF(x, y, width, height);
+ }
+ return resultList;
+}
+
+void ChatItem::mousePressEvent(QGraphicsSceneMouseEvent *event) {
+ if(event->buttons() == Qt::LeftButton) {
+ chatScene()->setSelectingItem(this);
+ _selectionStart = _selectionEnd = posToCursor(event->pos());
+ _selectionMode = NoSelection; // will be set to PartialSelection by mouseMoveEvent
+ update();
+ event->accept();
+ } else {
+ event->ignore();
+ }
+}
+
+void ChatItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event) {
+ if(event->buttons() == Qt::LeftButton) {
+ if(contains(event->pos())) {
+ qint16 end = posToCursor(event->pos());
+ if(end != _selectionEnd) {
+ _selectionEnd = end;
+ _selectionMode = (_selectionStart != _selectionEnd ? PartialSelection : NoSelection);
+ update();
+ }