eolian_mono: reduce duplicated code in OnXXXEvent

Summary:
`CallNativeEventCallback` is used to reduce duplicated code.

E.g.

Before
```
protected virtual void OnFullscreenChangedEvent(Efl.Ui.WinFullscreenChangedEventArgs e)
{
    var key = "_EFL_UI_WIN_EVENT_FULLSCREEN_CHANGED";
    IntPtr desc = Efl.EventDescription.GetNative(efl.Libs.Elementary, key);
    if (desc == IntPtr.Zero)
    {
        Eina.Log.Error($"Failed to get native event {key}");
        return;
    }

    IntPtr info = Eina.PrimitiveConversion.ManagedToPointerAlloc(e.arg ? (byte) 1 : (byte) 0);
    try
    {
        Efl.Eo.Globals.efl_event_callback_call(this.NativeHandle, desc, info);
    }
    finally
    {
        Marshal.FreeHGlobal(info);
    }
}
```

After
```
protected virtual void OnFullscreenChangedEvent(Efl.Ui.WinFullscreenChangedEventArgs e)
{
    IntPtr info = Eina.PrimitiveConversion.ManagedToPointerAlloc(e.arg ? (byte) 1 : (byte) 0);
    CallNativeEventCallback("elementary", "_EFL_UI_WIN_EVENT_FULLSCREEN_CHANGED", info, (p) => Marshal.FreeHGlobal(p));
}
```

Test Plan: meson setup -Dbindings=mono,cxx -Dmono-beta=true

Reviewers: lauromoura

Reviewed By: lauromoura

Subscribers: cedric, #reviewers, #committers

Tags: #efl

Differential Revision: https://phab.enlightenment.org/D10661

1 files changed, 19 insertions, 0 deletions

diff --git a/src/bindings/mono/eo_mono/EoWrapper.cs b/src/bindings/mono/eo_mono/EoWrapper.cs
index 554f4ec9bd..7445df3956 100644
--- a/src/bindings/mono/eo_mono/EoWrapper.cs
+++ b/src/bindings/mono/eo_mono/EoWrapper.cs
@@ -325,6 +325,7 @@ public abstract class EoWrapper : IWrapper, IDisposable
             }
         }
     }
+
     internal Efl.EventCb GetInternalEventCallback<T>(EventHandler<T> handler, Func<IntPtr, T> createArgsInstance) where T:EventArgs
     {
         return (IntPtr data, ref Efl.Event.NativeStruct evt) =>
@@ -344,6 +345,7 @@ public abstract class EoWrapper : IWrapper, IDisposable
            }
         };
     }
+
     internal Efl.EventCb GetInternalEventCallback(EventHandler handler)
     {
         return (IntPtr data, ref Efl.Event.NativeStruct evt) =>
@@ -364,6 +366,23 @@ public abstract class EoWrapper : IWrapper, IDisposable
         };
     }
 
+    internal void CallNativeEventCallback(string lib, string key, IntPtr eventInfo, Action<IntPtr> freeAction)
+    {
+        try
+        {
+            IntPtr desc = Efl.EventDescription.GetNative(lib, key);
+            if (desc == IntPtr.Zero)
+                throw new ArgumentException($"Failed to get native event {key}", "key");
+
+            Efl.Eo.Globals.CallEventCallback(NativeHandle, desc, eventInfo);
+        }
+        finally
+        {
+            if (freeAction != null)
+               freeAction(eventInfo);
+        }
+    }
+
     private static void OwnershipUniqueCallback(IntPtr data, ref Efl.Event.NativeStruct evt)
     {
         var ws = Efl.Eo.Globals.WrapperSupervisorPtrToManaged(data);