Method getScripts

src/core/parser.cpp:539–614

}

sptr<Atom> TeXParser::getScripts(wchar_t f) throw(ex_parse) {
    _pos++;
    // get the first script
    sptr<Atom> first = getArgument();
    sptr<Atom> second(nullptr);
    wchar_t s = '\0';

    if (_pos < _len) s = _parseString[_pos];

    /*
     * 4 conditions
     *
     * \cmd_{\sub}^{\super}
     *
     * \cmd_{\sub}
     *
     * \cmd^{\super}_{\sub}
     *
     * \cmd^{\super}
     */
    if (f == SUPER_SCRIPT && s == SUPER_SCRIPT) {
        second = first;
        first = nullptr;
    } else if (f == SUB_SCRIPT && s == SUPER_SCRIPT) {
        _pos++;
        second = getArgument();
    } else if (f == SUPER_SCRIPT && s == SUB_SCRIPT) {
        _pos++;
        second = first;
        first = getArgument();
    } else if (f == SUPER_SCRIPT && s != SUB_SCRIPT) {
        second = first;
        first = nullptr;
    }

    sptr<Atom> atom;
    RowAtom* rm = nullptr;
    if (_formula->_root == nullptr) {
        /*
         * If there's no root exists, passing a null atom to ScriptsAtom as base is OK,
         * the ScriptsAtom will handle it
         */
        return sptr<Atom>(new ScriptsAtom(nullptr, first, second));
    } else if (rm = dynamic_cast<RowAtom*>(_formula->_root.get())) {
        atom = rm->popLastAtom();
    } else {
        atom = _formula->_root;
        _formula->_root = nullptr;
    }

    // Check if previous atom is CumulativeScriptsAtom
    CumulativeScriptsAtom* ca = dynamic_cast<CumulativeScriptsAtom*>(atom.get());
    if (ca != nullptr) {
        ca->addSubscript(first);
        ca->addSuperscript(second);
        return atom;
    }