93 lines
3.8 KiB
C#
93 lines
3.8 KiB
C#
// Animancer // https://kybernetik.com.au/animancer // Copyright 2018-2024 Kybernetik //
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#if UNITY_EDITOR
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using System.Reflection;
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using UnityEditor;
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namespace Animancer.Editor
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{
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/// <summary>[Editor-Only] Utilities for using <see cref="DefaultValueAttribute"/>s.</summary>
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/// https://kybernetik.com.au/animancer/api/Animancer.Editor/DefaultValues
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public static class DefaultValues
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{
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/************************************************************************************************************************/
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/// <summary>[Editor-Only]
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/// If the field represented by the `property` has a <see cref="DefaultValueAttribute"/>,
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/// this method sets the `value` to its <see cref="DefaultValueAttribute.Primary"/> value.
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/// If it was already at the value, it sets it to the <see cref="DefaultValueAttribute.Secondary"/>
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/// value instead. And if the field has no attribute, it uses the default for the type.
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/// </summary>
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public static void SetToDefault<T>(ref T value, SerializedProperty property)
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{
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var accessor = property.GetAccessor();
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var field = accessor.GetField(property);
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if (field == null)
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accessor.SetValue(property, null);
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else
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SetToDefault(ref value, field);
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}
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/************************************************************************************************************************/
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/// <summary>[Editor-Only]
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/// If the field represented by the `property` has a <see cref="DefaultValueAttribute"/>,
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/// this method sets the `value` to its <see cref="DefaultValueAttribute.Primary"/> value.
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/// If it was already at the value, it sets it to the <see cref="DefaultValueAttribute.Secondary"/>
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/// value instead. And if the field has no attribute, it uses the default for the type.
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/// </summary>
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public static void SetToDefault<T>(ref T value, FieldInfo field)
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{
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var defaults = field.GetAttribute<DefaultValueAttribute>();
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if (defaults != null)
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defaults.SetToDefault(ref value);
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else
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value = default;
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}
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/************************************************************************************************************************/
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/// <summary>[Editor-Only]
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/// Sets the `value` equal to the <see cref="DefaultValueAttribute.Primary"/> value.
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/// If it was already at the value, it sets it equal to the <see cref="DefaultValueAttribute.Secondary"/>
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/// value instead.
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/// </summary>
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public static void SetToDefault<T>(this DefaultValueAttribute attribute, ref T value)
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{
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var primary = attribute.Primary;
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if (!Equals(value, primary))
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{
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value = (T)primary;
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return;
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}
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var secondary = attribute.Secondary;
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if (secondary != null || !typeof(T).IsValueType)
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{
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value = (T)secondary;
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return;
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}
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}
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/************************************************************************************************************************/
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/// <summary>[Editor-Only]
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/// Sets the `value` equal to the `primary` value.
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/// If it was already at the value, it sets it equal to the `secondary` value instead.
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/// </summary>
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public static void SetToDefault<T>(ref T value, T primary, T secondary)
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{
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if (!Equals(value, primary))
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value = primary;
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else
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value = secondary;
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}
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/************************************************************************************************************************/
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}
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}
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#endif
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