Method computeIgnorePatternDiff

syncthingmodel/syncthingfilemodel.cpp:195–227

! * \brief Computes a diff between the present ignore patterns and staged changes. */

 * \brief Computes a diff between the present ignore patterns and staged changes.
 */
QString SyncthingFileModel::computeIgnorePatternDiff()
{
    auto diff = QString();
    auto index = std::size_t();
    const auto appendNewLines = [&diff](const auto &lines) {
        for (const auto &line : lines) {
            diff.append(QChar('+'));
            diff.append(line);
            diff.append(QChar('\n'));
        }
    };
    if (const auto change = m_stagedChanges.find(beforeFirstLine); change != m_stagedChanges.end()) {
        appendNewLines(change->prepend);
        appendNewLines(change->append);
    }
    for (const auto &pattern : m_presentIgnorePatterns) {
        auto change = m_stagedChanges.find(index++);
        if (change != m_stagedChanges.end()) {
            if (change->replace && !change->prepend.isEmpty() && change->prepend.back() == pattern.pattern) {
                change->prepend.removeLast();
                change->replace = false;
            }
            appendNewLines(change->prepend);
        }
        diff.append(change == m_stagedChanges.end() || !change->replace ? QChar(' ') : QChar('-'));
        diff.append(pattern.pattern);
        diff.append(QChar('\n'));
        if (change != m_stagedChanges.end()) {
            appendNewLines(change->append);
        }
    }
    return diff;
}

QString SyncthingFileModel::availabilityNote(const SyncthingItem *item) const
{