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Bob.Song
189
Assets/Plugins/FairyGUI/Scripts/UI/AsyncCreationHelper.cs
Normal file
189
Assets/Plugins/FairyGUI/Scripts/UI/AsyncCreationHelper.cs
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using System.Collections;
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using System.Collections.Generic;
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using UnityEngine;
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using FairyGUI.Utils;
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namespace FairyGUI
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{
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public class AsyncCreationHelper
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{
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public static void CreateObject(PackageItem item, UIPackage.CreateObjectCallback callback)
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{
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Timers.inst.StartCoroutine(_CreateObject(item, callback));
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}
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static IEnumerator _CreateObject(PackageItem item, UIPackage.CreateObjectCallback callback)
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{
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Stats.LatestObjectCreation = 0;
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Stats.LatestGraphicsCreation = 0;
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float frameTime = UIConfig.frameTimeForAsyncUIConstruction;
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List<DisplayListItem> itemList = new List<DisplayListItem>();
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DisplayListItem di = new DisplayListItem(item, ObjectType.Component);
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di.childCount = CollectComponentChildren(item, itemList);
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itemList.Add(di);
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int cnt = itemList.Count;
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List<GObject> objectPool = new List<GObject>(cnt);
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GObject obj;
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float t = Time.realtimeSinceStartup;
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bool alreadyNextFrame = false;
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for (int i = 0; i < cnt; i++)
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{
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di = itemList[i];
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if (di.packageItem != null)
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{
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obj = UIObjectFactory.NewObject(di.packageItem);
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objectPool.Add(obj);
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UIPackage._constructing++;
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if (di.packageItem.type == PackageItemType.Component)
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{
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int poolStart = objectPool.Count - di.childCount - 1;
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((GComponent)obj).ConstructFromResource(objectPool, poolStart);
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objectPool.RemoveRange(poolStart, di.childCount);
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}
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else
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{
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obj.ConstructFromResource();
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}
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UIPackage._constructing--;
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}
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else
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{
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obj = UIObjectFactory.NewObject(di.type);
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objectPool.Add(obj);
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if (di.type == ObjectType.List && di.listItemCount > 0)
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{
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int poolStart = objectPool.Count - di.listItemCount - 1;
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for (int k = 0; k < di.listItemCount; k++) //把他们都放到pool里，这样GList在创建时就不需要创建对象了
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((GList)obj).itemPool.ReturnObject(objectPool[k + poolStart]);
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objectPool.RemoveRange(poolStart, di.listItemCount);
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}
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}
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if ((i % 5 == 0) && Time.realtimeSinceStartup - t >= frameTime)
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{
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yield return null;
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t = Time.realtimeSinceStartup;
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alreadyNextFrame = true;
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}
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}
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if (!alreadyNextFrame) //强制至至少下一帧才调用callback，避免调用者逻辑出错
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yield return null;
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callback(objectPool[0]);
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}
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/// <summary>
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/// 收集创建目标对象所需的所有类型信息
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/// </summary>
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/// <param name="item"></param>
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/// <param name="list"></param>
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static int CollectComponentChildren(PackageItem item, List<DisplayListItem> list)
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{
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ByteBuffer buffer = item.rawData;
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buffer.Seek(0, 2);
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int dcnt = buffer.ReadShort();
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DisplayListItem di;
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PackageItem pi;
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for (int i = 0; i < dcnt; i++)
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{
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int dataLen = buffer.ReadShort();
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int curPos = buffer.position;
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buffer.Seek(curPos, 0);
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ObjectType type = (ObjectType)buffer.ReadByte();
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string src = buffer.ReadS();
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string pkgId = buffer.ReadS();
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buffer.position = curPos;
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if (src != null)
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{
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UIPackage pkg;
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if (pkgId != null)
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pkg = UIPackage.GetById(pkgId);
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else
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pkg = item.owner;
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pi = pkg != null ? pkg.GetItem(src) : null;
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di = new DisplayListItem(pi, type);
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if (pi != null && pi.type == PackageItemType.Component)
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di.childCount = CollectComponentChildren(pi, list);
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}
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else
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{
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di = new DisplayListItem(null, type);
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if (type == ObjectType.List) //list
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di.listItemCount = CollectListChildren(buffer, list);
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}
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list.Add(di);
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buffer.position = curPos + dataLen;
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}
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return dcnt;
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}
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static int CollectListChildren(ByteBuffer buffer, List<DisplayListItem> list)
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{
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buffer.Seek(buffer.position, 8);
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string defaultItem = buffer.ReadS();
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int listItemCount = 0;
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int itemCount = buffer.ReadShort();
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for (int i = 0; i < itemCount; i++)
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{
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int nextPos = buffer.ReadShort();
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nextPos += buffer.position;
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string url = buffer.ReadS();
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if (url == null)
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url = defaultItem;
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if (!string.IsNullOrEmpty(url))
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{
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PackageItem pi = UIPackage.GetItemByURL(url);
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if (pi != null)
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{
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DisplayListItem di = new DisplayListItem(pi, pi.objectType);
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if (pi.type == PackageItemType.Component)
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di.childCount = CollectComponentChildren(pi, list);
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list.Add(di);
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listItemCount++;
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}
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}
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buffer.position = nextPos;
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}
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return listItemCount;
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}
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/// <summary>
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///
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/// </summary>
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class DisplayListItem
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{
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public PackageItem packageItem;
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public ObjectType type;
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public int childCount;
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public int listItemCount;
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public DisplayListItem(PackageItem pi, ObjectType type)
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{
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this.packageItem = pi;
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this.type = type;
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}
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}
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}
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}
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