src/Tizen.NUI/src/internal/EXaml/Operation/AddEvent.cs

   1 /*
   2  * Copyright(c) 2021 Samsung Electronics Co., Ltd.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  *
  16  */
  17 using System;
  18 using System.Collections.Generic;
  19 using System.Reflection;
  20 using System.Text;
  21 using Tizen.NUI.BaseComponents;
  22 using Tizen.NUI.Binding;
  23 using Tizen.NUI.Binding.Internals;
  24
  25 namespace Tizen.NUI.EXaml
  26 {
  27     internal class AddEvent : Operation
  28     {
  29         public AddEvent(GlobalDataList globalDataList, List<object> operationInfo)
  30         {
  31             instanceIndex = (int)operationInfo[0];
  32             elementIndex = (int)operationInfo[1];
  33             eventIndex = (int)operationInfo[2];
  34             valueIndex = (int)operationInfo[3];
  35             this.globalDataList = globalDataList;
  36         }
  37
  38         private GlobalDataList globalDataList;
  39
  40         public void Do()
  41         {
  42             object instance = globalDataList.GatheredInstances[instanceIndex];
  43             object element = globalDataList.GatheredInstances[elementIndex];
  44             var eventInfo = globalDataList.GatheredEvents[eventIndex];
  45             try
  46             {
  47                 var methodInfo = globalDataList.GatheredMethods[valueIndex];
  48                 Delegate eventDelegate = null;
  49
  50                 if (methodInfo.IsStatic)
  51                 {
  52                     eventDelegate = methodInfo.CreateDelegate(eventInfo.EventHandlerType);
  53                 }
  54                 else
  55                 {
  56                     eventDelegate = methodInfo.CreateDelegate(eventInfo.EventHandlerType, element);
  57                 }
  58
  59                 if (null != eventDelegate)
  60                 {
  61                     eventInfo.AddEventHandler(instance, eventDelegate);
  62                     globalDataList.RemoveEventOperations.Add(new RemoveEvent(eventDelegate, instance, eventInfo));
  63                 }
  64                 else
  65                 {
  66                     throw new Exception($"Can't create delegate for method {methodInfo.DeclaringType.FullName}.{methodInfo.Name}");
  67                 }
  68             }
  69             catch (ArgumentException ae)
  70             {
  71                 Tizen.Log.Fatal("EXaml", ae.ToString());
  72             }
  73         }
  74
  75         private int instanceIndex;
  76         private int elementIndex;
  77         private int eventIndex;
  78         private int valueIndex;
  79     }
  80 }