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271 lines
11 KiB
C#
271 lines
11 KiB
C#
1 year ago
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Reflection;
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using UnityEngine;
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using UnityEngine.Profiling;
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using UnityEngine.EventSystems;
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namespace UnityEditor.Events
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{
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[CustomPreview(typeof(GameObject))]
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/// <summary>
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/// Custom preview drawing that will draw the intercepted events of a given object.
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/// </summary>
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class InterceptedEventsPreview : ObjectPreview
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{
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protected class ComponentInterceptedEvents
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{
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public GUIContent componentName;
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public int[] interceptedEvents;
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}
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class Styles
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{
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public GUIStyle labelStyle = new GUIStyle(EditorStyles.label);
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public GUIStyle componentName = new GUIStyle(EditorStyles.boldLabel);
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public Styles()
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{
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Color fontColor = new Color(0.7f, 0.7f, 0.7f);
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labelStyle.padding.right += 20;
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labelStyle.normal.textColor = fontColor;
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labelStyle.active.textColor = fontColor;
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labelStyle.focused.textColor = fontColor;
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labelStyle.hover.textColor = fontColor;
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labelStyle.onNormal.textColor = fontColor;
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labelStyle.onActive.textColor = fontColor;
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labelStyle.onFocused.textColor = fontColor;
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labelStyle.onHover.textColor = fontColor;
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componentName.normal.textColor = fontColor;
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componentName.active.textColor = fontColor;
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componentName.focused.textColor = fontColor;
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componentName.hover.textColor = fontColor;
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componentName.onNormal.textColor = fontColor;
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componentName.onActive.textColor = fontColor;
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componentName.onFocused.textColor = fontColor;
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componentName.onHover.textColor = fontColor;
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}
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}
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private Dictionary<GameObject, List<ComponentInterceptedEvents>> m_TargetEvents;
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private bool m_InterceptsAnyEvent = false;
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private GUIContent m_Title;
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private Styles m_Styles = new Styles();
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public override void Initialize(UnityEngine.Object[] targets)
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{
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Profiler.BeginSample("ComponentInterceptedEvents.Initialize");
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base.Initialize(targets);
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m_TargetEvents = new Dictionary<GameObject, List<ComponentInterceptedEvents>>(targets.Length);
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m_InterceptsAnyEvent = false;
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for (int i = 0; i < targets.Length; ++i)
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{
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GameObject go = targets[i] as GameObject;
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List<ComponentInterceptedEvents> interceptedEvents = GetEventsInfo(go);
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m_TargetEvents.Add(go, interceptedEvents);
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if (interceptedEvents.Any())
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m_InterceptsAnyEvent = true;
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}
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Profiler.EndSample();
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}
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public override GUIContent GetPreviewTitle()
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{
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if (m_Title == null)
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{
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m_Title = EditorGUIUtility.TrTextContent("Intercepted Events");
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}
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return m_Title;
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}
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public override bool HasPreviewGUI()
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{
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return m_TargetEvents != null && m_InterceptsAnyEvent;
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}
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public override void OnPreviewGUI(Rect r, GUIStyle background)
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{
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if (Event.current.type != EventType.Repaint)
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return;
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Profiler.BeginSample("InterceptedEventsPreview.OnPreviewGUI");
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if (m_Styles == null)
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m_Styles = new Styles();
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Vector2 maxEventLabelSize = Vector2.zero;
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int totalInterceptedEvents = 0;
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List<ComponentInterceptedEvents> componentIncerceptedEvents = m_TargetEvents[target as GameObject];
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// Find out the maximum size needed for any given label.
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foreach (ComponentInterceptedEvents componentInterceptedEvents in componentIncerceptedEvents)
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{
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foreach (int eventIndex in componentInterceptedEvents.interceptedEvents)
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{
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GUIContent eventContent = s_PossibleEvents[eventIndex];
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++totalInterceptedEvents;
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Vector2 labelSize = m_Styles.labelStyle.CalcSize(eventContent);
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if (maxEventLabelSize.x < labelSize.x)
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{
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maxEventLabelSize.x = labelSize.x;
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}
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if (maxEventLabelSize.y < labelSize.y)
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{
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maxEventLabelSize.y = labelSize.y;
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}
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}
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}
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// Apply padding
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RectOffset previewPadding = new RectOffset(-5, -5, -5, -5);
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r = previewPadding.Add(r);
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// Figure out how many rows and columns we can/should have
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int columns = Mathf.Max(Mathf.FloorToInt(r.width / maxEventLabelSize.x), 1);
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int rows = Mathf.Max(totalInterceptedEvents / columns, 1) + componentIncerceptedEvents.Count;
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// Centering
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float initialX = r.x + Mathf.Max(0, (r.width - (maxEventLabelSize.x * columns)) / 2);
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float initialY = r.y + Mathf.Max(0, (r.height - (maxEventLabelSize.y * rows)) / 2);
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Rect labelRect = new Rect(initialX, initialY, maxEventLabelSize.x, maxEventLabelSize.y);
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int currentColumn = 0;
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foreach (ComponentInterceptedEvents componentInterceptedEvents in componentIncerceptedEvents)
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{
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GUI.Label(labelRect, componentInterceptedEvents.componentName, m_Styles.componentName);
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labelRect.y += labelRect.height;
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labelRect.x = initialX;
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foreach (int eventIndex in componentInterceptedEvents.interceptedEvents)
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{
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GUIContent eventContent = s_PossibleEvents[eventIndex];
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GUI.Label(labelRect, eventContent, m_Styles.labelStyle);
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if (currentColumn < columns - 1)
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{
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labelRect.x += labelRect.width;
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}
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else
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{
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labelRect.y += labelRect.height;
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labelRect.x = initialX;
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}
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currentColumn = (currentColumn + 1) % columns;
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}
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if (labelRect.x != initialX)
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{
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labelRect.y += labelRect.height;
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labelRect.x = initialX;
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}
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}
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Profiler.EndSample();
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}
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//Lookup cache to avoid recalculating which types uses which events:
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//Caches all interfaces that inherit from IEventSystemHandler
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static List<Type> s_EventSystemInterfaces = null;
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//Caches all GUIContents in a single list to avoid creating too much GUIContent and strings.
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private static List<GUIContent> s_PossibleEvents = null;
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//Caches all events used by each interface
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static Dictionary<Type, List<int>> s_InterfaceEventSystemEvents = null;
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//Caches each concrete type and it's events
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static readonly Dictionary<Type, ComponentInterceptedEvents> s_ComponentEvents2 = new Dictionary<Type, ComponentInterceptedEvents>();
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protected static List<ComponentInterceptedEvents> GetEventsInfo(GameObject gameObject)
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{
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InitializeEvetnsInterfaceCacheIfNeeded();
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List<ComponentInterceptedEvents> componentEvents = new List<ComponentInterceptedEvents>();
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MonoBehaviour[] mbs = gameObject.GetComponents<MonoBehaviour>();
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for (int i = 0, imax = mbs.Length; i < imax; ++i)
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{
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ComponentInterceptedEvents componentEvent = null;
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MonoBehaviour mb = mbs[i];
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if (mb == null)
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continue;
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Type type = mb.GetType();
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if (!s_ComponentEvents2.ContainsKey(type))
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{
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List<int> events = null;
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Profiler.BeginSample("ComponentInterceptedEvents.GetEventsInfo.NewType");
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if (typeof(IEventSystemHandler).IsAssignableFrom(type))
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{
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for (int index = 0; index < s_EventSystemInterfaces.Count; index++)
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{
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var eventInterface = s_EventSystemInterfaces[index];
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if (!eventInterface.IsAssignableFrom(type))
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continue;
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if (events == null)
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events = new List<int>();
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events.AddRange(s_InterfaceEventSystemEvents[eventInterface]);
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}
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}
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if (events != null)
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{
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componentEvent = new ComponentInterceptedEvents();
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componentEvent.componentName = new GUIContent(type.Name);
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componentEvent.interceptedEvents = events.OrderBy(index => s_PossibleEvents[index].text).ToArray();
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}
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s_ComponentEvents2.Add(type, componentEvent);
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Profiler.EndSample();
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}
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else
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{
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componentEvent = s_ComponentEvents2[type];
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}
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if (componentEvent != null)
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{
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componentEvents.Add(componentEvent);
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}
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}
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return componentEvents;
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}
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private static void InitializeEvetnsInterfaceCacheIfNeeded()
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{
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if (s_EventSystemInterfaces != null)
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return;
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s_EventSystemInterfaces = new List<Type>();
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s_PossibleEvents = new List<GUIContent>();
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s_InterfaceEventSystemEvents = new Dictionary<Type, List<int>>();
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TypeCache.TypeCollection types = TypeCache.GetTypesDerivedFrom<IEventSystemHandler>();
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foreach (var type in types)
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{
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if (!type.IsInterface)
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continue;
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s_EventSystemInterfaces.Add(type);
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List<int> eventIndexList = new List<int>();
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MethodInfo[] methodInfos = type.GetMethods(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
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for (int mi = 0; mi < methodInfos.Length; mi++)
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{
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MethodInfo methodInfo = methodInfos[mi];
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eventIndexList.Add(s_PossibleEvents.Count);
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s_PossibleEvents.Add(new GUIContent(methodInfo.Name));
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}
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s_InterfaceEventSystemEvents.Add(type, eventIndexList);
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}
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}
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}
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}
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