149 lines
5.1 KiB
C#
149 lines
5.1 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;
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using System.Collections.Generic;
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using UnityEditor;
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using UnityEngine;
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namespace Animancer.Editor
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{
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/// <summary>[Editor-Only] An <see cref="ICustomGUI"/> for <see cref="MulticastDelegate"/>.</summary>
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/// https://kybernetik.com.au/animancer/api/Animancer.Editor/DelegateGUI
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[CustomGUI(typeof(MulticastDelegate))]
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public class DelegateGUI : CustomGUI<MulticastDelegate>
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{
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/************************************************************************************************************************/
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private static readonly HashSet<MulticastDelegate>
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ExpandedItems = new();
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/************************************************************************************************************************/
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/// <summary>Calculates the number of vertical pixels required to draw the specified <see cref="MulticastDelegate"/>.</summary>
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public static float CalculateHeight(MulticastDelegate del)
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=> AnimancerGUI.CalculateHeight(CalculateLineCount(del));
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/// <summary>Calculates the number of lines required to draw the specified <see cref="MulticastDelegate"/>.</summary>
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public static int CalculateLineCount(MulticastDelegate del)
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=> del == null || !ExpandedItems.Contains(del)
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? 1
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: 1 + CalculateLineCount(AnimancerReflection.GetInvocationList(del));
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/// <summary>Calculates the number of lines required to draw the specified `invocationList`.</summary>
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public static int CalculateLineCount(Delegate[] invocationList)
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=> invocationList == null
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? 3
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: invocationList.Length * 3;
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/************************************************************************************************************************/
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/// <inheritdoc/>
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public override void DoGUI()
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{
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var area = AnimancerGUI.LayoutRect(CalculateHeight(Value));
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DoGUI(ref area, Label, Value);
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}
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/// <summary>Draws the GUI for the given delegate.</summary>
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public static void DoGUI(
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ref Rect area,
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GUIContent label,
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MulticastDelegate del,
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GUIContent valueLabel = null)
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{
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area.height = AnimancerGUI.LineHeight;
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var delegates = AnimancerReflection.GetInvocationList(del);
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var isExpanded = del != null && AnimancerGUI.DoHashedFoldoutGUI(area, ExpandedItems, del);
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if (valueLabel != null)
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{
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EditorGUI.LabelField(area, label, valueLabel);
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}
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else
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{
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var count = delegates == null ? 0 : delegates.Length;
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using (var countLabel = PooledGUIContent.Acquire(count.ToStringCached()))
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EditorGUI.LabelField(area, label, countLabel);
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}
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AnimancerGUI.NextVerticalArea(ref area);
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if (!isExpanded)
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return;
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EditorGUI.indentLevel++;
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if (delegates == null)
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{
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DoSingleGUI(ref area, del);
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}
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else
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{
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for (int i = 0; i < delegates.Length; i++)
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DoSingleGUI(ref area, delegates[i]);
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}
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EditorGUI.indentLevel--;
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}
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/************************************************************************************************************************/
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private const int TargetFieldCacheCapacity = 128;
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private static readonly Dictionary<object, FastObjectField>
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TargetFieldCache = new(TargetFieldCacheCapacity);
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/// <summary>Draws the target and name of the specified <see cref="Delegate"/>.</summary>
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public static void DoSingleGUI(ref Rect area, Delegate del)
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{
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area.height = AnimancerGUI.LineHeight;
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if (del == null)
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{
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EditorGUI.LabelField(area, "Delegate", "Null");
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AnimancerGUI.NextVerticalArea(ref area);
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return;
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}
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var method = del.Method;
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EditorGUI.LabelField(area, "Method", method.ToString());
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AnimancerGUI.NextVerticalArea(ref area);
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EditorGUI.LabelField(area, "Declaring Type", method.DeclaringType.GetNameCS());
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AnimancerGUI.NextVerticalArea(ref area);
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var target = del.Target;
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FastObjectField field;
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if (target is not null)
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TargetFieldCache.TryGetValue(target, out field);
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else
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field = FastObjectField.Null;
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field.Draw(area, "Target", target);
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if (target is not null)
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{
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if (TargetFieldCache.Count == TargetFieldCacheCapacity)
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TargetFieldCache.Clear();
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TargetFieldCache[target] = field;
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}
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AnimancerGUI.NextVerticalArea(ref area);
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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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