74 lines
3.0 KiB
C#
74 lines
3.0 KiB
C#
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using System;
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using System.Linq.Expressions;
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using UnityEditor;
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namespace Cinemachine.Editor
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{
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/// <summary>
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/// Helpers for the editor relating to SerializedPropertys
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/// </summary>
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public static class SerializedPropertyHelper
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{
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/// <summary>
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/// This is a way to get a field name string in such a manner that the compiler will
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/// generate errors for invalid fields. Much better than directly using strings.
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/// Usage: instead of
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/// <code>
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/// "m_MyField";
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/// </code>
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/// do this:
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/// <code>
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/// MyClass myclass = null;
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/// SerializedPropertyHelper.PropertyName( () => myClass.m_MyField);
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/// </code>
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/// </summary>
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/// <param name="exp">Magic expression that resolves to a field: () => myClass.m_MyField</param>
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/// <returns></returns>
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public static string PropertyName(Expression<Func<object>> exp)
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{
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var body = exp.Body as MemberExpression;
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if (body == null)
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{
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var ubody = (UnaryExpression)exp.Body;
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body = ubody.Operand as MemberExpression;
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}
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return body.Member.Name;
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}
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/// <summary>
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/// A compiler-assisted (non-string-based) way to call SerializedProperty.FindProperty
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/// </summary>
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/// <param name="obj">The serialized object to search</param>
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/// <param name="exp">Magic expression that resolves to a field: () => myClass.m_MyField</param>
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/// <returns>The resulting SerializedProperty, or null</returns>
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public static SerializedProperty FindProperty(this SerializedObject obj, Expression<Func<object>> exp)
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{
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return obj.FindProperty(PropertyName(exp));
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}
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/// <summary>
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/// A compiler-assisted (non-string-based) way to call SerializedProperty.FindPropertyRelative
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/// </summary>
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/// <param name="obj">The serialized object to search</param>
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/// <param name="exp">Magic expression that resolves to a field: () => myClass.m_MyField</param>
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/// <returns>The resulting SerializedProperty, or null</returns>
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public static SerializedProperty FindPropertyRelative(this SerializedProperty obj, Expression<Func<object>> exp)
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{
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return obj.FindPropertyRelative(PropertyName(exp));
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}
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/// <summary>Get the value of a proprty, as an object</summary>
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/// <param name="property">The property to query</param>
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/// <returns>The object value of the property</returns>
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public static object GetPropertyValue(SerializedProperty property)
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{
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var targetObject = property.serializedObject.targetObject;
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var targetObjectClassType = targetObject.GetType();
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var field = targetObjectClassType.GetField(property.propertyPath);
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if (field != null)
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return field.GetValue(targetObject);
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return null;
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}
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}
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}
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