Method update

crawl-ref/source/tilereg-spl.cc:189–222

}

void SpellRegion::update()
{
    m_items.clear();
    m_dirty = true;

    if (mx * my == 0)
        return;

    const unsigned int max_spells = min(22, mx*my);

    for (int i = 0; i < 52; ++i)
    {
        const char letter = index_to_letter(i);
        const spell_type spell = get_spell_by_letter(letter);
        if (spell == SPELL_NO_SPELL)
            continue;

        InventoryTile desc;
        desc.tile     = tileidx_spell(spell);
        desc.idx      = (int) spell;
        desc.quantity = spell_mana(spell);

        if (tile_command_not_applicable(CMD_CAST_SPELL, true)
            || spell_is_useless(spell, true, true))
        {
            desc.flag |= TILEI_FLAG_INVALID;
        }

        m_items.push_back(desc);

        if (m_items.size() >= max_spells)
            break;
    }
}

#endif