C++ item::is_container_empty方法代码示例

pickup_answer handle_problematic_pickup( const item &it, bool &offered_swap, const std::string &explain )
{
    player &u = g->u;

    uimenu amenu;
    amenu.return_invalid = true;

    amenu.selected = 0;
    amenu.text = explain;

    offered_swap = true;
    // @todo Gray out if not enough hands
    amenu.addentry( WIELD, !u.weapon.has_flag( "NO_UNWIELD" ), 'w',
                    _("Dispose of %s and wield %s"), u.weapon.display_name().c_str(),
                    it.display_name().c_str() );
    if( it.is_armor() ) {
        amenu.addentry( WEAR, u.can_wear( it ), 'W', _("Wear %s"), it.display_name().c_str() );
    }
    if( !it.is_container_empty() && u.can_pickVolume( it.volume() ) ) {
        amenu.addentry( SPILL, true, 's', _("Spill %s, then pick up %s"),
                        it.contents.front().tname().c_str(), it.display_name().c_str() );
    }

    amenu.query();
    int choice = amenu.ret;

    if( choice <= CANCEL || choice >= NUM_ANSWERS ) {
        return CANCEL;
    }

    return static_cast<pickup_answer>( choice );
}

bool player::can_consume( const item &it ) const
{
    if( can_consume_as_is( it ) ) {
        return true;
    }
    // checking NO_UNLOAD to prevent consumption of `battery` when contained in `battery_car` (#20012)
    return !it.is_container_empty() && !it.has_flag( "NO_UNLOAD" ) &&
           can_consume_as_is( it.contents.front() );
}

void Pickup::pick_one_up( const tripoint &pickup_target, item &newit, vehicle *veh,
                          int cargo_part, int index, int quantity, bool &got_water,
                          bool &offered_swap, PickupMap &mapPickup, bool autopickup )
{
    player &u = g->u;
    int moves_taken = 100;
    bool picked_up = false;
    pickup_answer option = CANCEL;
    item leftovers = newit;

    if( newit.invlet != '\0' &&
        u.invlet_to_position( newit.invlet ) != INT_MIN ) {
        // Existing invlet is not re-usable, remove it and let the code in player.cpp/inventory.cpp
        // add a new invlet, otherwise keep the (usable) invlet.
        newit.invlet = '\0';
    }

    if( quantity != 0 && newit.count_by_charges() ) {
        // Reinserting leftovers happens after item removal to avoid stacking issues.
        leftovers.charges = newit.charges - quantity;
        if( leftovers.charges > 0 ) {
            newit.charges = quantity;
        }
    } else {
        leftovers.charges = 0;
    }

    if( newit.made_of( LIQUID ) ) {
        got_water = true;
    } else if( !u.can_pickWeight( newit, false ) ) {
        add_msg( m_info, _( "The %s is too heavy!" ), newit.display_name().c_str() );
    } else if( newit.is_ammo() && ( newit.ammo_type() == ammotype( "arrow" ) ||
                                    newit.ammo_type() == ammotype( "bolt" ) ) ) {
        // @todo Make quiver code generic so that ammo pouches can use it too
        //add ammo to quiver
        int quivered = handle_quiver_insertion( newit, moves_taken, picked_up );

        if( quivered > 0 ) {
            quantity = quivered;
            //already picked up some for quiver so use special case handling
            picked_up = true;
            option = NUM_ANSWERS;
        }
        if( newit.charges > 0 ) {
            if( !u.can_pickVolume( newit ) ) {
                if( !autopickup ) {
                    // Silence some messaging if we're doing autopickup.
                    add_msg( m_info, ngettext( "There's no room in your inventory for the %s.",
                                               "There's no room in your inventory for the %s.",
                                               newit.charges ), newit.tname( newit.charges ).c_str() );
                }
            } else {
                // Add to inventory instead
                option = STASH;
            }
        }
        if( option == NUM_ANSWERS ) {
            //not picking up the rest so
            //update the charges for the item that gets re-added to the game map
            leftovers.charges = newit.charges;
        }
    } else if( newit.is_bucket() && !newit.is_container_empty() ) {
        if( !autopickup ) {
            const std::string &explain = string_format( _( "Can't stash %s while it's not empty" ),
                                         newit.display_name().c_str() );
            option = handle_problematic_pickup( newit, offered_swap, explain );
        } else {
            option = CANCEL;
        }
    } else if( !u.can_pickVolume( newit ) ) {
        if( !autopickup ) {
            const std::string &explain = string_format( _( "Not enough capacity to stash %s" ),
                                         newit.display_name().c_str() );
            option = handle_problematic_pickup( newit, offered_swap, explain );
        } else {
            option = CANCEL;
        }
    } else {
        option = STASH;
    }

    switch( option ) {
        case NUM_ANSWERS:
            // Some other option
            break;
        case CANCEL:
            picked_up = false;
            break;
        case WEAR:
            picked_up = u.wear_item( newit );
            break;
        case WIELD:
            picked_up = u.wield( newit );
            if( !picked_up ) {
                break;
            }

            if( u.weapon.invlet ) {
                add_msg( m_info, _( "Wielding %c - %s" ), u.weapon.invlet,
                         u.weapon.display_name().c_str() );
//.........这里部分代码省略.........

void pick_one_up( const tripoint &pickup_target, item &newit, vehicle *veh,
                  int cargo_part, int index, int quantity, bool &got_water,
                  bool &offered_swap, PickupMap &mapPickup, bool autopickup )
{
    player &u = g->u;
    int moves_taken = 100;
    bool picked_up = false;
    pickup_answer option = CANCEL;
    item leftovers = newit;

    if( newit.invlet != '\0' &&
        u.invlet_to_position( newit.invlet ) != INT_MIN ) {
        // Existing invlet is not re-usable, remove it and let the code in player.cpp/inventory.cpp
        // add a new invlet, otherwise keep the (usable) invlet.
        newit.invlet = '\0';
    }

    if( quantity != 0 && newit.count_by_charges() ) {
        // Reinserting leftovers happens after item removal to avoid stacking issues.
        leftovers.charges = newit.charges - quantity;
        if( leftovers.charges > 0 ) {
            newit.charges = quantity;
        }
    } else {
        leftovers.charges = 0;
    }

    if( newit.made_of( LIQUID ) ) {
        got_water = true;
    } else if( !u.can_pickWeight( newit, false ) ) {
        add_msg( m_info, _( "The %s is too heavy!" ), newit.display_name().c_str() );
    } else if( newit.is_bucket() && !newit.is_container_empty() ) {
        if( !autopickup ) {
            const std::string &explain = string_format( _( "Can't stash %s while it's not empty" ),
                                         newit.display_name().c_str() );
            option = handle_problematic_pickup( newit, offered_swap, explain );
        } else {
            option = CANCEL;
        }
    } else if( !u.can_pickVolume( newit ) ) {
        if( !autopickup ) {
            const std::string &explain = string_format( _( "Not enough capacity to stash %s" ),
                                         newit.display_name().c_str() );
            option = handle_problematic_pickup( newit, offered_swap, explain );
        } else {
            option = CANCEL;
        }
    } else {
        option = STASH;
    }

    switch( option ) {
        case NUM_ANSWERS:
            // Some other option
            break;
        case CANCEL:
            picked_up = false;
            break;
        case WEAR:
            picked_up = u.wear_item( newit );
            break;
        case WIELD:
            picked_up = u.wield( newit );
            if( !picked_up ) {
                break;
            }

            if( u.weapon.invlet ) {
                add_msg( m_info, _( "Wielding %c - %s" ), u.weapon.invlet,
                         u.weapon.display_name().c_str() );
            } else {
                add_msg( m_info, _( "Wielding - %s" ), u.weapon.display_name().c_str() );
            }
            break;
        case SPILL:
            if( newit.is_container_empty() ) {
                debugmsg( "Tried to spill contents from an empty container" );
                break;
            }

            picked_up = newit.spill_contents( u );
            if( !picked_up ) {
                break;
            }
        // Intentional fallthrough
        case STASH:
            auto &entry = mapPickup[newit.tname()];
            entry.second += newit.count_by_charges() ? newit.charges : 1;
            entry.first = u.i_add( newit );
            picked_up = true;
            break;
    }

    if( picked_up ) {
        remove_from_map_or_vehicle( pickup_target, veh, cargo_part, moves_taken, index );
    }
    if( leftovers.charges > 0 ) {
        bool to_map = veh == nullptr;
        if( !to_map ) {
            to_map = !veh->add_item( cargo_part, leftovers );
//.........这里部分代码省略.........