Method executeOnScreenWindow

src/SearchHistoryTask.cpp:38–206

}

void SearchHistoryTask::executeOnScreenWindow(const QPointer<Session> &session, const ScreenWindowPtr &window)
{
    Q_ASSERT(session);
    Q_ASSERT(window);

    Emulation *emulation = session->emulation();

    if (!_regExp.pattern().isEmpty()) {
        bool forwards = (_direction == Enum::ForwardsSearch);
        const int lastLine = window->lineCount() - 1;

        int startLine = _startLine;
        if (forwards && (_startLine == lastLine)) {
            if (!_noWrap) {
                startLine = 0;
            }
        } else if (!forwards && (_startLine == 0)) {
            if (!_noWrap) {
                startLine = lastLine;
            }
        } else {
            startLine = _startLine + (forwards ? 1 : -1);
        }

        QString string;

        // text stream to read history into string for pattern or regular expression searching
        QTextStream searchStream(&string);

        PlainTextDecoder decoder;
        decoder.setRecordLinePositions(true);

        // setup first and last lines depending on search direction
        int line = startLine;

        // read through and search history in blocks of 10K lines.
        // this balances the need to retrieve lots of data from the history each time
        //(for efficient searching)
        // without using silly amounts of memory if the history is very large.
        const int maxDelta = qMin(window->lineCount(), 10000);
        int delta = forwards ? maxDelta : -maxDelta;

        int endLine = line;
        bool continueLoop = true;
        bool invertDirection = false;
        bool hasWrapped = false; // set to true when we reach the top/bottom
        // of the output and continue from the other
        // end

        QSet<int> matchPositions;

        decoder.begin(&searchStream);
        emulation->writeToStream(&decoder, 0, lastLine);
        decoder.end();
        const QList<int> linePositions = decoder.linePositions();

        QRegularExpressionMatchIterator matchIterator = _regExp.globalMatch(string);
        while (matchIterator.hasNext()) {