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using System;
using System.Runtime.InteropServices;
using System.Runtime.CompilerServices;
using System.Threading;
namespace Efl
{
namespace Eo
{
public abstract class EoWrapper : IWrapper, IDisposable
{
protected readonly object eventLock = new object();
protected bool inherited = false;
protected System.IntPtr handle = IntPtr.Zero;
private static Efl.EventCb ownershipUniqueDelegate = new Efl.EventCb(OwnershipUniqueCallback);
private static Efl.EventCb ownershipSharedDelegate = new Efl.EventCb(OwnershipSharedCallback);
/// <summary>Initializes a new instance of the <see cref="Object"/> class.
/// Internal usage: Constructs an instance from a native pointer. This is used when interacting with C code and should not be used directly.</summary>
/// <param name="raw">The native pointer to be wrapped.</param>
protected EoWrapper(System.IntPtr raw)
{
handle = raw;
AddWrapperSupervisor();
}
/// <summary>Initializes a new instance of the <see cref="Object"/> class.
/// Internal usage: Constructor to actually call the native library constructors. C# subclasses
/// must use the public constructor only.</summary>
/// <param name="baseKlass">The pointer to the base native Eo class.</param>
/// <param name="managedType">The managed type of the public constructor that originated this call.</param>
/// <param name="parent">The Efl.Object parent of this instance.</param>
/// <param name="file">Name of the file from where the constructor is called.</param>
/// <param name="line">Number of the line from where the constructor is called.</param>
protected EoWrapper(IntPtr baseKlass, System.Type managedType, Efl.Object parent,
[CallerFilePath] string file = null,
[CallerLineNumber] int line = 0)
{
inherited = ((object)this).GetType() != managedType;
IntPtr actual_klass = baseKlass;
if (inherited)
{
actual_klass = Efl.Eo.ClassRegister.GetInheritKlassOrRegister(baseKlass, ((object)this).GetType());
}
// Creation of the unfinalized Eo handle
Eina.Log.Debug($"Instantiating from klass 0x{actual_klass.ToInt64():x}");
System.IntPtr parent_ptr = System.IntPtr.Zero;
if (parent != null)
{
parent_ptr = parent.NativeHandle;
}
handle = Efl.Eo.Globals._efl_add_internal_start(file, line, actual_klass, parent_ptr, 1, 0);
if (handle == System.IntPtr.Zero)
{
throw new Exception("Instantiation failed");
}
Eina.Log.Debug($"Eo instance right after internal_start 0x{handle.ToInt64():x} with refcount {Efl.Eo.Globals.efl_ref_count(handle)}");
Eina.Log.Debug($"Parent was 0x{parent_ptr.ToInt64()}");
// Creation of wrapper supervisor
AddWrapperSupervisor();
}
/// <summary>Destructor.</summary>
~EoWrapper()
{
Dispose(false);
}
/// <summary>Pointer to the native instance.</summary>
public System.IntPtr NativeHandle
{
get { return handle; }
}
/// <summary>Pointer to the native class description.</summary>
public abstract System.IntPtr NativeClass
{
get;
}
/// <summary>Releases the underlying native instance.</summary>
protected virtual void Dispose(bool disposing)
{
if (disposing && handle != System.IntPtr.Zero)
{
IntPtr h = handle;
handle = IntPtr.Zero;
Efl.Eo.Globals.efl_mono_native_dispose(h);
}
else
{
Monitor.Enter(Efl.All.InitLock);
if (Efl.All.MainLoopInitialized)
{
Efl.Eo.Globals.efl_mono_thread_safe_native_dispose(handle);
}
Monitor.Exit(Efl.All.InitLock);
}
}
/// <summary>Turns the native pointer into a string representation.</summary>
/// <returns>A string with the type and the native pointer for this object.</returns>
public override String ToString()
{
return $"{this.GetType().Name}@[0x{(UInt64)handle:x}]";
}
/// <summary>Releases the underlying native instance.</summary>
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
/// <summary>Releases the underlying Eo object.
///
/// This method is a C# counterpart to the C `efl_del` function. It removes the parent of the object
/// and releases the Eo reference it was holding.
/// </summary>
public void Del()
{
// FIXME Implement this
((Efl.Object)this).SetParent(null);
Dispose();
}
/// <summary>Finishes instantiating this object.
/// Internal usage by generated code.</summary>
protected void FinishInstantiation()
{
Eina.Log.Debug("calling efl_add_internal_end");
var h = Efl.Eo.Globals._efl_add_end(handle, 1, 0);
Eina.Log.Debug($"efl_add_end returned eo 0x{handle.ToInt64():x}");
// if (h == IntPtr.Zero) // TODO
// {
// }
handle = h;
}
/// <summary>Adds a new event handler, registering it to the native event. For internal use only.</summary>
/// <param name="lib">The name of the native library definining the event.</param>
/// <param name="key">The name of the native event.</param>
/// <param name="evtCaller">Delegate to be called by native code on event raising.</param>
/// <param name="evtDelegate">Managed delegate that will be called by evtCaller on event raising.</param>
protected void AddNativeEventHandler(string lib, string key, Efl.EventCb evtCaller, object evtDelegate)
{
IntPtr desc = Efl.EventDescription.GetNative(lib, key);
if (desc == IntPtr.Zero)
{
Eina.Log.Error($"Failed to get native event {key}");
return;
}
var wsPtr = Efl.Eo.Globals.efl_mono_wrapper_supervisor_get(handle);
var ws = Efl.Eo.Globals.WrapperSupervisorPtrToManaged(wsPtr);
if (ws.EoEvents.ContainsKey((desc, evtDelegate)))
{
Eina.Log.Warning($"Event proxy for event {key} already registered!");
return;
}
IntPtr evtCallerPtr = Marshal.GetFunctionPointerForDelegate(evtCaller);
if (!Efl.Eo.Globals.efl_event_callback_priority_add(handle, desc, 0, evtCallerPtr, wsPtr))
{
Eina.Log.Error($"Failed to add event proxy for event {key}");
return;
}
ws.EoEvents[(desc, evtDelegate)] = (evtCallerPtr, evtCaller);
Eina.Error.RaiseIfUnhandledException();
}
/// <summary>Removes the given event handler for the given event. For internal use only.</summary>
/// <param name="lib">The name of the native library definining the event.</param>
/// <param name="key">The name of the native event.</param>
/// <param name="evtDelegate">The delegate to be removed.</param>
protected void RemoveNativeEventHandler(string lib, string key, object evtDelegate)
{
IntPtr desc = Efl.EventDescription.GetNative(lib, key);
if (desc == IntPtr.Zero)
{
Eina.Log.Error($"Failed to get native event {key}");
return;
}
var wsPtr = Efl.Eo.Globals.efl_mono_wrapper_supervisor_get(handle);
var ws = Efl.Eo.Globals.WrapperSupervisorPtrToManaged(wsPtr);
var evtPair = (desc, evtDelegate);
if (ws.EoEvents.TryGetValue(evtPair, out var caller))
{
if (!Efl.Eo.Globals.efl_event_callback_del(handle, desc, caller.evtCallerPtr, wsPtr))
{
Eina.Log.Error($"Failed to remove event proxy for event {key}");
return;
}
ws.EoEvents.Remove(evtPair);
Eina.Error.RaiseIfUnhandledException();
}
else
{
Eina.Log.Error($"Trying to remove proxy for event {key} when it is not registered.");
}
}
private static void OwnershipUniqueCallback(IntPtr data, ref Efl.Event.NativeStruct evt)
{
var ws = Efl.Eo.Globals.WrapperSupervisorPtrToManaged(data);
ws.MakeUnique();
}
private static void OwnershipSharedCallback(IntPtr data, ref Efl.Event.NativeStruct evt)
{
var ws = Efl.Eo.Globals.WrapperSupervisorPtrToManaged(data);
ws.MakeShared();
}
/// <sumary>Create and set to the internal native state a C# supervisor for this Eo wrapper. For internal use only.</sumary>
private void AddWrapperSupervisor()
{
var ws = new Efl.Eo.WrapperSupervisor(this);
Efl.Eo.Globals.SetWrapperSupervisor(handle, ws);
if (Efl.Eo.Globals.efl_ref_count(handle) > 1)
{
ws.MakeShared();
}
AddOwnershipEventHandlers();
}
/// <summary>Register handlers to ownership events, in order to control the object lifetime. For internal use only.</summary>
private void AddOwnershipEventHandlers()
{
AddNativeEventHandler("eo", "_EFL_EVENT_INVALIDATE", ownershipUniqueDelegate, ownershipUniqueDelegate);
AddNativeEventHandler("eo", "_EFL_EVENT_OWNERSHIP_UNIQUE", ownershipUniqueDelegate, ownershipUniqueDelegate);
AddNativeEventHandler("eo", "_EFL_EVENT_OWNERSHIP_SHARED", ownershipSharedDelegate, ownershipSharedDelegate);
Eina.Error.RaiseIfUnhandledException();
}
}
} // namespace Global
} // namespace Efl
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