InputScheme.h

/*
 * Copyright (C) 2014 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef INPUTSCHEME_H
#define INPUTSCHEME_H

#include <map>
#include "ControllerEvent.h"

template <typename Input = int>
class InputScheme {
public:
    typedef int Action;

    typedef std::map<Input, Action> Map;

    InputScheme() {
    }

    explicit InputScheme(const Map& scheme)
        : mScheme(scheme) {
    }

    virtual ~InputScheme() { }

    bool empty() const { return mScheme.empty(); }

    typename Map::const_iterator begin() const {
        return mScheme.cbegin();
    }

    typename Map::const_iterator end() const {
        return mScheme.cend();
    }

    bool hasActionFor(const Input& input) const {
        return mScheme.count(input) > 0;
    }

    bool intersects(const InputScheme<Input>& inputScheme) const {
        for (auto& inputActionPair : inputScheme) {
            if (mScheme.count(inputActionPair.first)) {
                return true;
            }
        }
        return false;
    }

    virtual bool handlesControllerEvent(const ControllerEvent* event) const = 0;

private:
    Map mScheme;
};

#endif // INPUTSCHEME_H