def open_chat_source(self):
"""Open a dialog with chat buffer source."""
item = self.switch_buffers.currentItem()
if item and item.active.buf:
buf = item.active.buf
source_dialog = DebugDialog(self)
source_dialog.chat.setPlainText(buf.widget.chat.toHtml())
source_dialog.chat.setFocusPolicy(QtCore.Qt.WheelFocus)
source_dialog.setWindowTitle(buf.data['full_name'])
