dolphin/Source/Core/Common/Config/Config.h
Léo Lam 05c8d229af Config: Handle unknown system strings better
Currently, a simple typo in the system name will trigger an assert
message that complains about a "programming error". This is not
user friendly and misleading.

So this changes GetSystemFromName to return an std::optional, which
allows for callers to check whether the system exists and handle
failures better.
2017-11-26 18:24:01 +01:00

100 lines
2.3 KiB
C++

// Copyright 2016 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
#pragma once
#include <functional>
#include <map>
#include <memory>
#include <optional>
#include <string>
#include "Common/Config/ConfigInfo.h"
#include "Common/Config/Enums.h"
#include "Common/Config/Layer.h"
namespace Config
{
using Layers = std::map<LayerType, std::unique_ptr<Layer>>;
using ConfigChangedCallback = std::function<void()>;
// Layer management
Layers* GetLayers();
void AddLayer(std::unique_ptr<Layer> layer);
void AddLayer(std::unique_ptr<ConfigLayerLoader> loader);
Layer* GetLayer(LayerType layer);
void RemoveLayer(LayerType layer);
bool LayerExists(LayerType layer);
void AddConfigChangedCallback(ConfigChangedCallback func);
void InvokeConfigChangedCallbacks();
// Explicit load and save of layers
void Load();
void Save();
void Init();
void Shutdown();
void ClearCurrentRunLayer();
const std::string& GetSystemName(System system);
std::optional<System> GetSystemFromName(const std::string& system);
const std::string& GetLayerName(LayerType layer);
LayerType GetActiveLayerForConfig(const ConfigLocation&);
template <typename T>
T Get(LayerType layer, const ConfigInfo<T>& info)
{
if (layer == LayerType::Meta)
return Get(info);
return GetLayer(layer)->Get(info);
}
template <typename T>
T Get(const ConfigInfo<T>& info)
{
return GetLayer(GetActiveLayerForConfig(info.location))->Get(info);
}
template <typename T>
T GetBase(const ConfigInfo<T>& info)
{
return Get(LayerType::Base, info);
}
template <typename T>
LayerType GetActiveLayerForConfig(const ConfigInfo<T>& info)
{
return GetActiveLayerForConfig(info.location);
}
template <typename T>
void Set(LayerType layer, const ConfigInfo<T>& info, const T& value)
{
GetLayer(layer)->Set(info, value);
InvokeConfigChangedCallbacks();
}
template <typename T>
void SetBase(const ConfigInfo<T>& info, const T& value)
{
Set<T>(LayerType::Base, info, value);
}
template <typename T>
void SetCurrent(const ConfigInfo<T>& info, const T& value)
{
Set<T>(LayerType::CurrentRun, info, value);
}
template <typename T>
void SetBaseOrCurrent(const ConfigInfo<T>& info, const T& value)
{
if (GetActiveLayerForConfig(info) == LayerType::Base)
Set<T>(LayerType::Base, info, value);
else
Set<T>(LayerType::CurrentRun, info, value);
}
}