Function elidedPathLeft

kdevplatform/language/backgroundparser/backgroundparser.cpp:56–73

* Elides string in @p path, e.g. "VEEERY/LONG/PATH" -> ".../LONG/PATH" * - probably much faster than QFontMetrics::elidedText() * - we do not need a widget context * - takes path separators into account * * @p width Maximum number of characters * * TODO: Move to kdevutil? */

 * TODO: Move to kdevutil?
 */
QString elidedPathLeft(const QString& path, int width)
{
    const QLatin1String placeholder("...");

    if (path.size() <= width) {
        return path;
    }

    int start = (path.size() - width) + placeholder.size();
    int pos = path.indexOf(QDir::separator(), start);
    if (pos == -1) {
        pos = start; // no separator => just cut off the path at the beginning
    }
    Q_ASSERT(path.size() - pos >= 0 && path.size() - pos <= width);

    const auto elidedText = QStringView{path}.last(path.size() - pos);
    return placeholder + elidedText;
}

/**
 * @return true if @p url is non-empty, valid and has a clean path, false otherwise.