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#include "lineprefixer.h"

namespace ClangBackEnd {

LinePrefixer::LinePrefixer(const QByteArray &prefix)
    : m_prefix(prefix)
    , m_previousIsEndingWithNewLine(true)
{}

QByteArray LinePrefixer::prefix(const QByteArray &text)
{
    QByteArray output = text;

    if (m_previousIsEndingWithNewLine)
        output.prepend(m_prefix);

    if (output.endsWith('\n')) {
        m_previousIsEndingWithNewLine = true;
        output.chop(1);
    } else {
        m_previousIsEndingWithNewLine = false;
    }

    output.replace("\n", "\n" + m_prefix);
    if (m_previousIsEndingWithNewLine)
        output.append('\n');

    return output;
}

} // namespace ClangBackEnd