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Assets/Plugins/FairyGUI/Scripts/UI/UIObjectFactory.cs

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+using System;
+using System.Collections.Generic;
+using UnityEngine;
+#if FAIRYGUI_TOLUA
+using LuaInterface;
+#endif
+
+namespace FairyGUI
+{
+    /// <summary>
+    /// 
+    /// </summary>
+    public class UIObjectFactory
+    {
+        public delegate GComponent GComponentCreator();
+        public delegate GLoader GLoaderCreator();
+
+        static Dictionary<string, GComponentCreator> packageItemExtensions = new Dictionary<string, GComponentCreator>();
+        static GLoaderCreator loaderCreator;
+
+        /// <summary>
+        /// 
+        /// </summary>
+        /// <param name="url"></param>
+        /// <param name="type"></param>
+        public static void SetPackageItemExtension(string url, System.Type type)
+        {
+            SetPackageItemExtension(url, () => { return (GComponent)Activator.CreateInstance(type); });
+        }
+
+        /// <summary>
+        /// 
+        /// </summary>
+        /// <param name="url"></param>
+        /// <param name="creator"></param>
+        public static void SetPackageItemExtension(string url, GComponentCreator creator)
+        {
+            if (url == null)
+                throw new Exception("Invaild url: " + url);
+
+            PackageItem pi = UIPackage.GetItemByURL(url);
+            if (pi != null)
+                pi.extensionCreator = creator;
+
+            packageItemExtensions[url] = creator;
+        }
+
+#if FAIRYGUI_TOLUA
+        public static void SetExtension(string url, System.Type baseType, LuaFunction extendFunction)
+        {
+            SetPackageItemExtension(url, () =>
+            {
+                GComponent gcom = (GComponent)Activator.CreateInstance(baseType);
+
+                extendFunction.BeginPCall();
+                extendFunction.Push(gcom);
+                extendFunction.PCall();
+                gcom.SetLuaPeer(extendFunction.CheckLuaTable());
+                extendFunction.EndPCall();
+
+                return gcom;
+            });
+        }
+#endif
+
+        /// <summary>
+        /// 
+        /// </summary>
+        /// <param name="type"></param>
+        public static void SetLoaderExtension(System.Type type)
+        {
+            loaderCreator = () => { return (GLoader)Activator.CreateInstance(type); };
+        }
+
+        /// <summary>
+        /// 
+        /// </summary>
+        /// <param name="creator"></param>
+        public static void SetLoaderExtension(GLoaderCreator creator)
+        {
+            loaderCreator = creator;
+        }
+
+        internal static void ResolvePackageItemExtension(PackageItem pi)
+        {
+            if (!packageItemExtensions.TryGetValue(UIPackage.URL_PREFIX + pi.owner.id + pi.id, out pi.extensionCreator)
+                && !packageItemExtensions.TryGetValue(UIPackage.URL_PREFIX + pi.owner.name + "/" + pi.name, out pi.extensionCreator))
+                pi.extensionCreator = null;
+        }
+
+        public static void Clear()
+        {
+            packageItemExtensions.Clear();
+            loaderCreator = null;
+        }
+
+        /// <summary>
+        /// 
+        /// </summary>
+        /// <param name="pi"></param>
+        /// <param name="userClass"></param>
+        /// <returns></returns>
+        public static GObject NewObject(PackageItem pi, System.Type userClass = null)
+        {
+            GObject obj;
+            if (pi.type == PackageItemType.Component)
+            {
+                if (userClass != null)
+                {
+                    Stats.LatestObjectCreation++;
+                    obj = (GComponent)Activator.CreateInstance(userClass);
+                }
+                else if (pi.extensionCreator != null)
+                {
+                    Stats.LatestObjectCreation++;
+                    obj = pi.extensionCreator();
+                }
+                else
+                    obj = NewObject(pi.objectType);
+            }
+            else
+                obj = NewObject(pi.objectType);
+
+            if (obj != null)
+                obj.packageItem = pi;
+
+            return obj;
+        }
+
+        /// <summary>
+        /// 
+        /// </summary>
+        /// <param name="type"></param>
+        /// <returns></returns>
+        public static GObject NewObject(ObjectType type)
+        {
+            Stats.LatestObjectCreation++;
+
+            switch (type)
+            {
+                case ObjectType.Image:
+                    return new GImage();
+
+                case ObjectType.MovieClip:
+                    return new GMovieClip();
+
+                case ObjectType.Component:
+                    return new GComponent();
+
+                case ObjectType.Text:
+                    return new GTextField();
+
+                case ObjectType.RichText:
+                    return new GRichTextField();
+
+                case ObjectType.InputText:
+                    return new GTextInput();
+
+                case ObjectType.Group:
+                    return new GGroup();
+
+                case ObjectType.List:
+                    return new GList();
+
+                case ObjectType.Graph:
+                    return new GGraph();
+
+                case ObjectType.Loader:
+                    if (loaderCreator != null)
+                        return loaderCreator();
+                    else
+                        return new GLoader();
+
+                case ObjectType.Button:
+                    return new GButton();
+
+                case ObjectType.Label:
+                    return new GLabel();
+
+                case ObjectType.ProgressBar:
+                    return new GProgressBar();
+
+                case ObjectType.Slider:
+                    return new GSlider();
+
+                case ObjectType.ScrollBar:
+                    return new GScrollBar();
+
+                case ObjectType.ComboBox:
+                    return new GComboBox();
+
+                case ObjectType.Tree:
+                    return new GTree();
+
+                case ObjectType.Loader3D:
+                    return new GLoader3D();
+
+                default:
+                    return null;
+            }
+        }
+
+#if UNITY_2019_3_OR_NEWER
+        [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
+        static void InitializeOnLoad()
+        {
+            Clear();
+        }
+#endif
+    }
+}