Method toggleFold

ui/codeeditor/codeeditor.cpp:296–328

}

void CodeEditor::toggleFold(const QTextBlock &startBlock)
{
#ifdef HAVE_SYNTAX_HIGHLIGHTING
    // we also want to fold the last line of the region, therefore the ".next()"
    const auto endBlock = m_highlighter->findFoldingRegionEnd(startBlock).next();

    if (isFolded(startBlock)) {
        // unfold
        auto block = startBlock.next();
        while (block.isValid() && !block.isVisible()) {
            block.setVisible(true);
            block.setLineCount(block.layout()->lineCount());
            block = block.next();
        }

    } else {
        // fold
        auto block = startBlock.next();
        while (block.isValid() && block != endBlock) {
            block.setVisible(false);
            block.setLineCount(0);
            block = block.next();
        }
    }

    // redraw document
    document()->markContentsDirty(startBlock.position(), endBlock.position() - startBlock.position() + 1);
    // update scrollbars
    emit document()->documentLayout()->documentSizeChanged(document()->documentLayout()->documentSize());
#else
    Q_UNUSED(startBlock);
#endif
}