Method prev

src/Gui/PythonConsole.cpp:1636–1653

* prev switches the history pointer to the previous item. * The optional parameter prefix allows one to search the history selectively for commands that * start with a certain character sequence. * @param prefix - prefix string for searching backwards in history, empty string by default * @return true if the pointer was switched to an earlier item, false otherwise. */

 * @return true if the pointer was switched to an earlier item, false otherwise.
 */
bool ConsoleHistory::prev(const QString& prefix)
{
    bool wentPrev = false;

    // store prefix if it's the first history access
    if (_it == _history.cend()) {
        _prefix = prefix;
    }

    // while we didn't go back or reach history's begin ...
    while (!wentPrev && _it != _history.cbegin()) {
        // go back in history and check if item matches prefix
        // Skip empty items
        --_it;
        wentPrev = (!_it->isEmpty() && _it->startsWith(_prefix));
    }
    return wentPrev;
}

bool ConsoleHistory::isEmpty() const
{