focus_list.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program 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.
 *
 * This program 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 <http://www.gnu.org/licenses/>.
 *
 */

#ifndef ZVISION_FOCUS_LIST_H
#define ZVISION_FOCUS_LIST_H

#include "common/array.h"

namespace ZVision {

template<class T>
class FocusList : public Common::Array<T> {
private:
    typedef uint size_type;
public:
    void set(const T currentFocus) {
        if (!this->size())
            this->push_back(currentFocus);
        else {
            if (this->front() != currentFocus) {
                Common::Array<T> buffer;
                while (this->size() > 0) {
                    if (this->back() != currentFocus)
                        buffer.push_back(this->back());
                    this->pop_back();
                }
                this->push_back(currentFocus);
                while (buffer.size() > 0) {
                    this->push_back(buffer.back());
                    buffer.pop_back();
                }
            }
        }
    }

    void remove(const T value) {
        if (this->size()) {
            Common::Array<T> buffer;
            while (this->size() > 0) {
                if (this->back() != value)
                    buffer.push_back(this->back());
                this->pop_back();
            }
            while (buffer.size() > 0) {
                this->push_back(buffer.back());
                buffer.pop_back();
            }
        }
    }

};

}  // End of namespace ZVision

#endif