98 lines
2.8 KiB
C++
98 lines
2.8 KiB
C++
// Copyright (c) 2012-2024 Wojciech Figat. All rights reserved.
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#pragma once
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#include "ScriptingType.h"
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#include "Engine/Core/Types/String.h"
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/// <summary>
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/// Utilities for using enums types (declared in scripting with API_ENUM).
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/// </summary>
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class ScriptingEnum
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{
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public:
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// Gets the list with enum items (the last item Name is null)
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template<class EnumType>
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static const ScriptingType::EnumItem* GetItems()
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{
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const ScriptingTypeHandle typeHandle = StaticType<EnumType>();
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if (typeHandle)
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{
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const ScriptingType& type = typeHandle.GetType();
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if (type.Type == ScriptingTypes::Enum)
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return type.Enum.Items;
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}
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return nullptr;
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}
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// Gets the name of the enum value or null if invalid
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template<class EnumType>
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static const char* GetName(EnumType value)
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{
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if (const auto items = GetItems<EnumType>())
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{
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for (int32 i = 0; items[i].Name; i++)
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{
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if (items[i].Value == (uint64)value)
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return items[i].Name;
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}
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}
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return nullptr;
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}
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// Gets the name of the enum value or empty string if invalid
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template<class EnumType>
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static String ToString(EnumType value)
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{
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return String(GetName<EnumType>(value));
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}
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// Gets the value of the enum based on the name.
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template<class EnumType>
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static EnumType FromString(const StringAnsiView& name)
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{
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if (const auto items = GetItems<EnumType>())
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{
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for (int32 i = 0; items[i].Name; i++)
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{
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if (name == items[i].Name)
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return (EnumType)items[i].Value;
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}
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}
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return (EnumType)0;
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}
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// Gets the value of the enum based on the name.
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template<class EnumType>
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static EnumType FromString(const StringView& name)
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{
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return FromString<EnumType>(StringAnsi(name));
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}
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// Gets the name of the enum value as separated flags
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template<class EnumType>
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static String ToStringFlags(EnumType value, Char separator = '|')
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{
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String result;
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if (const auto items = GetItems<EnumType>())
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{
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for (int32 i = 0; items[i].Name; i++)
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{
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const uint64 itemValue = items[i].Value;
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if ((uint64)value == 0 && itemValue == 0)
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{
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result = items[i].Name;
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break;
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}
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if (itemValue != 0 && EnumHasAllFlags<EnumType>(value, (EnumType)itemValue))
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{
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if (result.HasChars())
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result += separator;
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result += items[i].Name;
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}
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}
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}
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return result;
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}
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};
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