// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <limits>
#include <map>
#include <optional>
#include <stdexcept>
#include <string>
#include <typeindex>
#include <typeinfo>
#include <fmt/core.h>
#include "common/common_types.h"
#include "common/settings_common.h"
#include "common/settings_enums.h"
namespace Settings {
/** The Setting class is a simple resource manager. It defines a label and default value
* alongside the actual value of the setting for simpler and less-error prone use with frontend
* configurations. Specifying a default value and label is required. A minimum and maximum range
* can be specified for sanitization.
*/
template <typename Type, bool ranged = false>
class Setting : public BasicSetting {
protected:
Setting() = default;
public:
/**
* Sets a default value, label, and setting value.
*
* @param linkage Setting registry
* @param default_val Initial value of the setting, and default value of the setting
* @param name Label for the setting
* @param category_ Category of the setting AKA INI group
* @param specialization_ Suggestion for how frontend implementations represent this in a config
* @param save_ Suggests that this should or should not be saved to a frontend config file
* @param runtime_modifiable_ Suggests whether this is modifiable while a guest is loaded
* @param other_setting_ A second Setting to associate to this one in metadata
*/
explicit Setting(Linkage& linkage, const Type& default_val, const std::string& name,
Category category_, u32 specialization_ = Specialization::Default,
bool save_ = true, bool runtime_modifiable_ = false,
BasicSetting* other_setting_ = nullptr)
requires(!ranged)
: BasicSetting(linkage, name, category_, save_, runtime_modifiable_, specialization_,
other_setting_),
value{default_val}, default_value{default_val} {}
virtual ~Setting() = default;
/**
* Sets a default value, minimum value, maximum value, and label.
*
* @param linkage Setting registry
* @param default_val Initial value of the setting, and default value of the setting
* @param min_val Sets the minimum allowed value of the setting
* @param max_val Sets the maximum allowed value of the setting
* @param name Label for the setting
* @param category_ Category of the setting AKA INI group
* @param specialization_ Suggestion for how frontend implementations represent this in a config
* @param save_ Suggests that this should or should not be saved to a frontend config file
* @param runtime_modifiable_ Suggests whether this is modifiable while a guest is loaded
* @param other_setting_ A second Setting to associate to this one in metadata
*/
explicit Setting(Linkage& linkage, const Type& default_val, const Type& min_val,
const Type& max_val, const std::string& name, Category category_,
u32 specialization_ = Specialization::Default, bool save_ = true,
bool runtime_modifiable_ = false, BasicSetting* other_setting_ = nullptr)
requires(ranged)
: BasicSetting(linkage, name, category_, save_, runtime_modifiable_, specialization_,
other_setting_),
value{default_val}, default_value{default_val}, maximum{max_val}, minimum{min_val} {}
/**
* Returns a reference to the setting's value.
*
* @returns A reference to the setting
*/
[[nodiscard]] virtual const Type& GetValue() const {
return value;
}
[[nodiscard]] virtual const Type& GetValue(bool need_global) const {
return value;
}
/**
* Sets the setting to the given value.
*
* @param val The desired value
*/
virtual void SetValue(const Type& val) {
Type temp{ranged ? std::clamp(val, minimum, maximum) : val};
std::swap(value, temp);
}
/**
* Returns the value that this setting was created with.
*
* @returns A reference to the default value
*/
[[nodiscard]] const Type& GetDefault() const {
return default_value;
}
[[nodiscard]] constexpr bool IsEnum() const override {
return std::is_enum_v<Type>;
}
protected:
[[nodiscard]] std::string ToString(const Type& value_) const {
if constexpr (std::is_same_v<Type, std::string>) {
return value_;
} else if constexpr (std::is_same_v<Type, std::optional<u32>>) {
return value_.has_value() ? std::to_string(*value_) : "none";
} else if constexpr (std::is_same_v<Type, bool>) {
return value_ ? "true" : "false";
} else if constexpr (std::is_same_v<Type, AudioEngine>) {
// Compatibility with old AudioEngine setting being a string
return CanonicalizeEnum(value_);
} else if constexpr (std::is_floating_point_v<Type>) {
return fmt::format("{:f}", value_);
} else if constexpr (std::is_enum_v<Type>) {
return std::to_string(static_cast<u32>(value_));
} else {
return std::to_string(value_);
}
}
public:
/**
* Converts the value of the setting to a std::string. Respects the global state if the setting
* has one.
*
* @returns The current setting as a std::string
*/
[[nodiscard]] std::string ToString() const override {
return ToString(this->GetValue());
}
/**
* Returns the default value of the setting as a std::string.
*
* @returns The default value as a string.
*/
[[nodiscard]] std::string DefaultToString() const override {
return ToString(default_value);
}
/**
* Assigns a value to the setting.
*
* @param val The desired setting value
*
* @returns A reference to the setting
*/
virtual const Type& operator=(const Type& val) {
Type temp{ranged ? std::clamp(val, minimum, maximum) : val};
std::swap(value, temp);
return value;
}
/**
* Returns a reference to the setting.
*
* @returns A reference to the setting
*/
explicit virtual operator const Type&() const {
return value;
}
/**
* Converts the given value to the Setting's type of value. Uses SetValue to enter the setting,
* thus respecting its constraints.
*
* @param input The desired value
*/
void LoadString(const std::string& input) override final {
if (input.empty()) {
this->SetValue(this->GetDefault());
return;
}
try {
if constexpr (std::is_same_v<Type, std::string>) {
this->SetValue(input);
} else if constexpr (std::is_same_v<Type, std::optional<u32>>) {
this->SetValue(static_cast<u32>(std::stoul(input)));
} else if constexpr (std::is_same_v<Type, bool>) {
this->SetValue(input == "true");
} else if constexpr (std::is_same_v<Type, float>) {
this->SetValue(std::stof(input));
} else if constexpr (std::is_same_v<Type, AudioEngine>) {
this->SetValue(ToEnum<AudioEngine>(input));
} else {
this->SetValue(static_cast<Type>(std::stoll(input)));
}
} catch (std::invalid_argument&) {
this->SetValue(this->GetDefault());
} catch (std::out_of_range&) {
this->SetValue(this->GetDefault());
}
}
[[nodiscard]] std::string Canonicalize() const override final {
if constexpr (std::is_enum_v<Type>) {
return CanonicalizeEnum(this->GetValue());
} else {
return ToString(this->GetValue());
}
}
/**
* Gives us another way to identify the setting without having to go through a string.
*
* @returns the type_index of the setting's type
*/
[[nodiscard]] std::type_index TypeId() const override final {
return std::type_index(typeid(Type));
}
[[nodiscard]] constexpr u32 EnumIndex() const override final {
if constexpr (std::is_enum_v<Type>) {
return EnumMetadata<Type>::Index();
} else {
return std::numeric_limits<u32>::max();
}
}
[[nodiscard]] constexpr bool IsFloatingPoint() const final {
return std::is_floating_point_v<Type>;
}
[[nodiscard]] constexpr bool IsIntegral() const final {
return std::is_integral_v<Type>;
}
[[nodiscard]] std::string MinVal() const override final {
if constexpr (std::is_arithmetic_v<Type> && !ranged) {
return this->ToString(std::numeric_limits<Type>::min());
} else {
return this->ToString(minimum);
}
}
[[nodiscard]] std::string MaxVal() const override final {
if constexpr (std::is_arithmetic_v<Type> && !ranged) {
return this->ToString(std::numeric_limits<Type>::max());
} else {
return this->ToString(maximum);
}
}
[[nodiscard]] constexpr bool Ranged() const override {
return ranged;
}
protected:
Type value{}; ///< The setting
const Type default_value{}; ///< The default value
const Type maximum{}; ///< Maximum allowed value of the setting
const Type minimum{}; ///< Minimum allowed value of the setting
};
/**
* The SwitchableSetting class is a slightly more complex version of the Setting class. This adds a
* custom setting to switch to when a guest application specifically requires it. The effect is that
* other components of the emulator can access the setting's intended value without any need for the
* component to ask whether the custom or global setting is needed at the moment.
*
* By default, the global setting is used.
*/
template <typename Type, bool ranged = false>
class SwitchableSetting : virtual public Setting<Type, ranged> {
public:
/**
* Sets a default value, label, and setting value.
*
* @param linkage Setting registry
* @param default_val Initial value of the setting, and default value of the setting
* @param name Label for the setting
* @param category_ Category of the setting AKA INI group
* @param specialization_ Suggestion for how frontend implementations represent this in a config
* @param save_ Suggests that this should or should not be saved to a frontend config file
* @param runtime_modifiable_ Suggests whether this is modifiable while a guest is loaded
* @param other_setting_ A second Setting to associate to this one in metadata
*/
template <typename T = BasicSetting>
explicit SwitchableSetting(Linkage& linkage, const Type& default_val, const std::string& name,
Category category_, u32 specialization_ = Specialization::Default,
bool save_ = true, bool runtime_modifiable_ = false,
typename std::enable_if<!ranged, T*>::type other_setting_ = nullptr)
: Setting<Type, false>{
linkage, default_val, name, category_, specialization_,
save_, runtime_modifiable_, other_setting_} {
linkage.restore_functions.emplace_back([this]() { this->SetGlobal(true); });
}
virtual ~SwitchableSetting() = default;
/**
* Sets a default value, minimum value, maximum value, and label.
*
* @param linkage Setting registry
* @param default_val Initial value of the setting, and default value of the setting
* @param min_val Sets the minimum allowed value of the setting
* @param max_val Sets the maximum allowed value of the setting
* @param name Label for the setting
* @param category_ Category of the setting AKA INI group
* @param specialization_ Suggestion for how frontend implementations represent this in a config
* @param save_ Suggests that this should or should not be saved to a frontend config file
* @param runtime_modifiable_ Suggests whether this is modifiable while a guest is loaded
* @param other_setting_ A second Setting to associate to this one in metadata
*/
template <typename T = BasicSetting>
explicit SwitchableSetting(Linkage& linkage, const Type& default_val, const Type& min_val,
const Type& max_val, const std::string& name, Category category_,
u32 specialization_ = Specialization::Default, bool save_ = true,
bool runtime_modifiable_ = false,
typename std::enable_if<ranged, T*>::type other_setting_ = nullptr)
: Setting<Type, true>{linkage, default_val, min_val,
max_val, name, category_,
specialization_, save_, runtime_modifiable_,
other_setting_} {
linkage.restore_functions.emplace_back([this]() { this->SetGlobal(true); });
}
/**
* Tells this setting to represent either the global or custom setting when other member
* functions are used.
*
* @param to_global Whether to use the global or custom setting.
*/
void SetGlobal(bool to_global) override final {
use_global = to_global;
}
/**
* Returns whether this setting is using the global setting or not.
*
* @returns The global state
*/
[[nodiscard]] bool UsingGlobal() const override final {
return use_global;
}
/**
* Returns either the global or custom setting depending on the values of this setting's global
* state or if the global value was specifically requested.
*
* @param need_global Request global value regardless of setting's state; defaults to false
*
* @returns The required value of the setting
*/
[[nodiscard]] const Type& GetValue() const override final {
if (use_global) {
return this->value;
}
return custom;
}
[[nodiscard]] const Type& GetValue(bool need_global) const override final {
if (use_global || need_global) {
return this->value;
}
return custom;
}
/**
* Sets the current setting value depending on the global state.
*
* @param val The new value
*/
void SetValue(const Type& val) override final {
Type temp{ranged ? std::clamp(val, this->minimum, this->maximum) : val};
if (use_global) {
std::swap(this->value, temp);
} else {
std::swap(custom, temp);
}
}
[[nodiscard]] constexpr bool Switchable() const override final {
return true;
}
[[nodiscard]] std::string ToStringGlobal() const override final {
return this->ToString(this->value);
}
/**
* Assigns the current setting value depending on the global state.
*
* @param val The new value
*
* @returns A reference to the current setting value
*/
const Type& operator=(const Type& val) override final {
Type temp{ranged ? std::clamp(val, this->minimum, this->maximum) : val};
if (use_global) {
std::swap(this->value, temp);
return this->value;
}
std::swap(custom, temp);
return custom;
}
/**
* Returns the current setting value depending on the global state.
*
* @returns A reference to the current setting value
*/
explicit operator const Type&() const override final {
if (use_global) {
return this->value;
}
return custom;
}
protected:
bool use_global{true}; ///< The setting's global state
Type custom{}; ///< The custom value of the setting
};
} // namespace Settings
