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/* InfoPanelState.h
Copyright (c) 2020 by Eric Xing
Endless Sky is free software: you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation, either version 3 of the License, or (at your option) any later version.
Endless Sky is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program. If not, see <https://www.gnu.org/licenses/>.
*/
#pragma once
#include <memory>
#include <set>
#include <vector>
class PlayerInfo;
class Ship;
// This class is responsible for storing the state
// between PlayerInfoPanel and ShipInfoPanel so that
// things like scroll position, selection and sort are
// saved when the user is switching between the panels.
class InfoPanelState {
public:
using ShipComparator = bool(const std::shared_ptr<Ship> &, const std::shared_ptr<Ship> &);
explicit InfoPanelState(PlayerInfo &player);
int SelectedIndex() const;
void SetSelectedIndex(int newSelectedIndex);
const std::set<int> &AllSelected() const;
void SetSelected(std::set<int> selected);
void Select(int index);
void SelectOnly(int index);
void SelectMany(int start, int end);
bool Deselect(int index);
void DeselectAll();
void Disown(std::vector<std::shared_ptr<Ship>>::const_iterator it);
bool CanEdit() const;
int Scroll() const;
void SetScroll(int newScroll);
std::vector<std::shared_ptr<Ship>> &Ships();
const std::vector<std::shared_ptr<Ship>> &Ships() const;
bool ReorderShipsTo(int toIndex);
ShipComparator *CurrentSort() const;
void SetCurrentSort(ShipComparator *s);
private:
bool ReorderShips(const std::set<int> &fromIndices, int toIndex);
private:
PlayerInfo &player;
// Most recent selected ship index.
int selectedIndex = -1;
// Indices of selected ships.
std::set<int> allSelected;
// A copy of PlayerInfo.ships for viewing and manipulating.
std::vector<std::shared_ptr<Ship>> ships;
// When the player is landed, they are able to
// change their flagship and reorder their fleet.
const bool canEdit = false;
// Index of the ship at the top of the fleet listing.
int scroll = 0;
// Keep track of whether the ships are sorted.
ShipComparator *currentSort = nullptr;
};
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