static void begin_print_callback(GtkPrintOperation* op, GtkPrintContext* context, gpointer user_data)
{
PrintContext* printContext = reinterpret_cast<PrintContext*>(user_data);
float width = gtk_print_context_get_width(context);
float height = gtk_print_context_get_height(context);
FloatRect printRect = FloatRect(0, 0, width, height);
printContext->begin(width);
// TODO: Margin adjustments and header/footer support
float headerHeight = 0;
float footerHeight = 0;
float pageHeight; // height of the page adjusted by margins
printContext->computePageRects(printRect, headerHeight, footerHeight, 1.0, pageHeight);
gtk_print_operation_set_n_pages(op, printContext->pageCount());
}
