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// Copyright 2016 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <cmath>
#include <memory>
#include "InputCommon/ControlReference/ExpressionParser.h"
#include "InputCommon/ControllerInterface/CoreDevice.h"
// ControlReference
//
// These are what you create to actually use the inputs, InputReference or OutputReference.
//
// After being bound to devices and controls with UpdateReference,
// each one can link to multiple devices and controls
// when you change a ControlReference's expression,
// you must use UpdateReference on it to rebind controls
//
class ControlReference
{
public:
// Note: this is per thread.
static void SetInputGate(bool enable);
static bool GetInputGate();
virtual ~ControlReference();
virtual ControlState State(const ControlState state = 0) = 0;
virtual bool IsInput() const = 0;
template <typename T>
T GetState();
int BoundCount() const;
ciface::ExpressionParser::ParseStatus GetParseStatus() const;
void UpdateReference(ciface::ExpressionParser::ControlEnvironment& env);
std::string GetExpression() const;
// Returns a human-readable error description when the given expression is invalid.
std::optional<std::string> SetExpression(std::string expr);
ControlState range = 1;
protected:
ControlReference();
std::string m_expression;
std::unique_ptr<ciface::ExpressionParser::Expression> m_parsed_expression;
ciface::ExpressionParser::ParseStatus m_parse_status =
ciface::ExpressionParser::ParseStatus::EmptyExpression;
};
template <>
inline bool ControlReference::GetState<bool>()
{
// Round to nearest of 0 or 1.
return std::lround(State()) > 0;
}
template <>
inline int ControlReference::GetState<int>()
{
return std::lround(State());
}
template <>
inline ControlState ControlReference::GetState<ControlState>()
{
return State();
}
//
// InputReference
//
// Control reference for inputs
//
class InputReference : public ControlReference
{
public:
InputReference();
bool IsInput() const override;
ControlState State(const ControlState state) override;
};
//
// OutputReference
//
// Control reference for outputs
//
class OutputReference : public ControlReference
{
public:
OutputReference();
bool IsInput() const override;
ControlState State(const ControlState state) override;
};
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