text: /*****************************************************************************************
   *                                                                                       *
   * OpenSpace                                                                             *
   *                                                                                       *
   * Copyright (c) 2014-2019                                                               *
   *                                                                                       *
   * Permission is hereby granted, free of charge, to any person obtaining a copy of this  *
   * software and associated documentation files (the "Software"), to deal in the Software *
   * without restriction, including without limitation the rights to use, copy, modify,    *
   * merge, publish, distribute, sublicense, and/or sell copies of the Software, and to    *
   * permit persons to whom the Software is furnished to do so, subject to the following   *
   * conditions:                                                                           *
   *                                                                                       *
   * The above copyright notice and this permission notice shall be included in all copies *
   * or substantial portions of the Software.                                              *
   *                                                                                       *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,   *
   * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A         *
   * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT    *
   * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF  *
   * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE  *
   * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                                         *
   ****************************************************************************************/
  
  #include <openspace/interaction/inputstate.h>
  
  #include <openspace/engine/globals.h>
  #include <openspace/interaction/joystickinputstate.h>
  #include <ghoul/fmt.h>
  #include <algorithm>
  
  namespace openspace::interaction {
  
  void InputState::keyboardCallback(Key key, KeyModifier modifier, KeyAction action) {
      if (action == KeyAction::Press) {
          _keysDown.emplace_back(key, modifier);
      }
      else if (action == KeyAction::Release) {
          // Remove all key pressings for 'key'
          _keysDown.erase(
              std::remove_if(
                  _keysDown.begin(),
                  _keysDown.end(),
                  [key](const std::pair<Key, KeyModifier>& keyModPair) {
                      return keyModPair.first == key;
                  }
              ),
              _keysDown.end()
          );
      }
  }
  
  void InputState::mouseButtonCallback(MouseButton button, MouseAction action) {
      if (action == MouseAction::Press) {
          _mouseButtonsDown.push_back(button);
      }
      else if (action == MouseAction::Release) {
          _mouseButtonsDown.erase(
              std::remove(_mouseButtonsDown.begin(), _mouseButtonsDown.end(), button),
              _mouseButtonsDown.end()
          );
      }
  }
  
  void InputState::mousePositionCallback(double mouseX, double mouseY) {
      _mousePosition = glm::dvec2(mouseX, mouseY);
  }
  
  void InputState::mouseScrollWheelCallback(double mouseScrollDelta) {
      _mouseScrollDelta = mouseScrollDelta;
  }
  
  const std::vector<std::pair<Key, KeyModifier>>& InputState::pressedKeys() const {
      return _keysDown;
  }
  
  const std::vector<MouseButton>& InputState::pressedMouseButtons() const {
      return _mouseButtonsDown;
  }
  
  glm::dvec2 InputState::mousePosition() const {
      return _mousePosition;
  }
  
  double InputState::mouseScrollDelta() const {
      return _mouseScrollDelta;
  }
  
  bool InputState::isKeyPressed(std::pair<Key, KeyModifier> keyModPair) const {
      return std::find(_keysDown.begin(), _keysDown.end(), keyModPair) != _keysDown.end();
  }
  
  bool InputState::isKeyPressed(Key key) const {
      auto it = std::find_if(_keysDown.begin(), _keysDown.end(),
          [key](const std::pair<Key, KeyModifier>& keyModPair) {
          return key == keyModPair.first;
      });
      return it != _keysDown.end();
  }
  
  bool InputState::isMouseButtonPressed(MouseButton mouseButton) const {
      auto it = std::find(_mouseButtonsDown.begin(), _mouseButtonsDown.end(), mouseButton);
      return it != _mouseButtonsDown.end();
  }
  
  float InputState::joystickAxis(int i) const {
      return global::joystickInputStates.axis(i);
  }
  
  bool InputState::joystickButton(int i) const {
      return global::joystickInputStates.button(i, JoystickAction::Press);
  }
  
  } // namespace openspace::interaction
  