GtkSharp/glib/Object.cs
Mike Kestner 7cdaf34aa2 Remove ClassInitializer attributes.
* AssemblyInfo.cs.in: remove the ignore attr from the assemblies.
* glib/ClassInitializerAttribute.cs: remove obsolete method target attr.
* glib/IgnoreClassInitializersAttribute.cs: remove.
* glib/Makefile.am: update sources and stop copying AssemblyInfo.cs around.
* glib/Object.cs: remove the obsolete ClassInitializer fallback mechanism.
2011-02-09 10:05:40 -06:00

687 lines
20 KiB
C#

// Object.cs - GObject class wrapper implementation
//
// Authors: Mike Kestner <mkestner@speakeasy.net>
//
// Copyright (c) 2001-2003 Mike Kestner
// Copyright (c) 2004-2005 Novell, Inc.
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of version 2 of the Lesser GNU General
// Public License as published by the Free Software Foundation.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this program; if not, write to the
// Free Software Foundation, Inc., 59 Temple Place - Suite 330,
// Boston, MA 02111-1307, USA.
namespace GLib {
using System;
using System.Collections;
using System.ComponentModel;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Text;
public class Object : IWrapper, IDisposable {
IntPtr handle;
ToggleRef tref;
bool disposed = false;
Hashtable data;
static Hashtable Objects = new Hashtable();
static ArrayList PendingDestroys = new ArrayList ();
static bool idle_queued;
~Object ()
{
lock (PendingDestroys) {
lock (Objects) {
if (Objects[Handle] is ToggleRef)
PendingDestroys.Add (Objects [Handle]);
Objects.Remove (Handle);
}
if (!idle_queued){
Timeout.Add (50, new TimeoutHandler (PerformQueuedUnrefs));
idle_queued = true;
}
}
}
[DllImport ("libgobject-2.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
static extern void g_object_unref (IntPtr raw);
static bool PerformQueuedUnrefs ()
{
object [] references;
lock (PendingDestroys){
references = new object [PendingDestroys.Count];
PendingDestroys.CopyTo (references, 0);
PendingDestroys.Clear ();
idle_queued = false;
}
foreach (ToggleRef r in references)
r.Free ();
return false;
}
public virtual void Dispose ()
{
if (disposed)
return;
disposed = true;
ToggleRef toggle_ref = Objects [Handle] as ToggleRef;
Objects.Remove (Handle);
try {
if (toggle_ref != null)
toggle_ref.Free ();
} catch (Exception e) {
Console.WriteLine ("Exception while disposing a " + this + " in Gtk#");
throw e;
}
handle = IntPtr.Zero;
GC.SuppressFinalize (this);
}
[DllImport ("libgobject-2.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
static extern IntPtr g_object_ref (IntPtr raw);
public static Object GetObject(IntPtr o, bool owned_ref)
{
if (o == IntPtr.Zero)
return null;
Object obj = null;
if (Objects.Contains (o)) {
ToggleRef toggle_ref = Objects [o] as ToggleRef;
if (toggle_ref != null && toggle_ref.IsAlive)
obj = toggle_ref.Target;
}
if (obj != null && obj.Handle == o) {
if (owned_ref)
g_object_unref (obj.Handle);
return obj;
}
if (!owned_ref)
g_object_ref (o);
obj = GLib.ObjectManager.CreateObject(o);
if (obj == null) {
g_object_unref (o);
return null;
}
return obj;
}
public static Object GetObject(IntPtr o)
{
return GetObject (o, false);
}
private static void ConnectDefaultHandlers (GType gtype, System.Type t)
{
foreach (MethodInfo minfo in t.GetMethods(BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.DeclaredOnly)) {
MethodInfo baseinfo = minfo.GetBaseDefinition ();
if (baseinfo == minfo)
continue;
foreach (object attr in baseinfo.GetCustomAttributes (typeof (DefaultSignalHandlerAttribute), false)) {
DefaultSignalHandlerAttribute sigattr = attr as DefaultSignalHandlerAttribute;
MethodInfo connector = sigattr.Type.GetMethod (sigattr.ConnectionMethod, BindingFlags.Static | BindingFlags.NonPublic, null, new Type[] { typeof (GType) }, new ParameterModifier [0]);
object[] parms = new object [1];
parms [0] = gtype;
connector.Invoke (null, parms);
break;
}
}
}
private static void InvokeTypeInitializers (GType gtype, System.Type t)
{
object[] parms = {gtype, t};
BindingFlags flags = BindingFlags.Static | BindingFlags.NonPublic;
foreach (TypeInitializerAttribute tia in t.GetCustomAttributes (typeof (TypeInitializerAttribute), true)) {
MethodInfo m = tia.Type.GetMethod (tia.MethodName, flags);
if (m != null)
m.Invoke (null, parms);
}
}
// Key: The pointer to the ParamSpec of the property
// Value: The corresponding PropertyInfo object
static Hashtable properties;
static Hashtable Properties {
get {
if (properties == null)
properties = new Hashtable ();
return properties;
}
}
struct GTypeClass {
public IntPtr gtype;
}
struct GObjectClass {
GTypeClass type_class;
IntPtr construct_props;
public ConstructorDelegate constructor_cb;
public SetPropertyDelegate set_prop_cb;
public GetPropertyDelegate get_prop_cb;
IntPtr dispose;
IntPtr finalize;
IntPtr dispatch_properties_changed;
IntPtr notify;
IntPtr constructed;
IntPtr dummy1;
IntPtr dummy2;
IntPtr dummy3;
IntPtr dummy4;
IntPtr dummy5;
IntPtr dummy6;
IntPtr dummy7;
}
[UnmanagedFunctionPointer (CallingConvention.Cdecl)]
delegate IntPtr ConstructorDelegate (IntPtr gtype, uint n_construct_properties, IntPtr construct_properties);
static ConstructorDelegate constructor_handler;
static ConstructorDelegate ConstructorHandler {
get {
if (constructor_handler == null)
constructor_handler = new ConstructorDelegate (ConstructorCallback);
return constructor_handler;
}
}
[DllImport ("libgobject-2.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
static extern IntPtr g_param_spec_get_name (IntPtr pspec);
static IntPtr ConstructorCallback (IntPtr gtypeval, uint n_construct_properties, IntPtr construct_properties)
{
GType gtype = new GLib.GType (gtypeval);
GObjectClass threshold_class = (GObjectClass) Marshal.PtrToStructure (gtype.GetThresholdType ().GetClassPtr (), typeof (GObjectClass));
IntPtr raw = threshold_class.constructor_cb (gtypeval, n_construct_properties, construct_properties);
bool construct_needed = true;
for (int i = 0; i < n_construct_properties; i++) {
IntPtr p = new IntPtr (construct_properties.ToInt64 () + i * 2 * IntPtr.Size);
string prop_name = Marshaller.Utf8PtrToString (g_param_spec_get_name (Marshal.ReadIntPtr (p)));
if (prop_name != "gtk-sharp-managed-instance")
continue;
Value val = (Value) Marshal.PtrToStructure (Marshal.ReadIntPtr (p, IntPtr.Size), typeof (Value));
if ((IntPtr) val.Val != IntPtr.Zero) {
GCHandle gch = (GCHandle) (IntPtr) val.Val;
Object o = (GLib.Object) gch.Target;
o.Raw = raw;
construct_needed = false;
break;
}
}
if (construct_needed)
GetObject (raw, false);
return raw;
}
[DllImport ("libgobject-2.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
static extern void g_object_class_install_property (IntPtr klass, uint prop_id, IntPtr param_spec);
static IntPtr RegisterProperty (GType type, string name, string nick, string blurb, uint property_id, GType property_type, bool can_read, bool can_write)
{
IntPtr declaring_class = type.GetClassPtr ();
ParamSpec pspec = new ParamSpec (name, nick, blurb, property_type, can_read, can_write);
g_object_class_install_property (declaring_class, property_id, pspec.Handle);
return pspec.Handle;
}
static void AddProperties (GType gtype, System.Type t, bool register_instance_prop)
{
uint idx = 1;
if (register_instance_prop) {
IntPtr declaring_class = gtype.GetClassPtr ();
ParamSpec pspec = new ParamSpec ("gtk-sharp-managed-instance", "", "", GType.Pointer, ParamFlags.Writable | ParamFlags.ConstructOnly);
g_object_class_install_property (declaring_class, idx, pspec.Handle);
idx++;
}
bool handlers_overridden = register_instance_prop;
foreach (PropertyInfo pinfo in t.GetProperties (BindingFlags.Instance | BindingFlags.Public | BindingFlags.DeclaredOnly)) {
foreach (object attr in pinfo.GetCustomAttributes (typeof (PropertyAttribute), false)) {
if(pinfo.GetIndexParameters().Length > 0)
throw(new InvalidOperationException(String.Format("GLib.RegisterPropertyAttribute cannot be applied to property {0} of type {1} because the property expects one or more indexed parameters", pinfo.Name, t.FullName)));
if (!handlers_overridden) {
IntPtr class_ptr = gtype.GetClassPtr ();
GObjectClass gobject_class = (GObjectClass) Marshal.PtrToStructure (class_ptr, typeof (GObjectClass));
gobject_class.get_prop_cb = GetPropertyHandler;
gobject_class.set_prop_cb = SetPropertyHandler;
Marshal.StructureToPtr (gobject_class, class_ptr, false);
handlers_overridden = true;
}
PropertyAttribute property_attr = attr as PropertyAttribute;
try {
IntPtr param_spec = RegisterProperty (gtype, property_attr.Name, property_attr.Nickname, property_attr.Blurb, idx, (GType) pinfo.PropertyType, pinfo.CanRead, pinfo.CanWrite);
Properties.Add (param_spec, pinfo);
idx++;
} catch (ArgumentException) {
throw new InvalidOperationException (String.Format ("GLib.PropertyAttribute cannot be applied to property {0} of type {1} because the return type of the property is not supported", pinfo.Name, t.FullName));
}
}
}
}
[UnmanagedFunctionPointer (CallingConvention.Cdecl)]
delegate void GetPropertyDelegate (IntPtr GObject, uint property_id, ref GLib.Value value, IntPtr pspec);
static void GetPropertyCallback (IntPtr handle, uint property_id, ref GLib.Value value, IntPtr param_spec)
{
if (!Properties.Contains (param_spec))
return;
GLib.Object obj = GLib.Object.GetObject (handle, false);
value.Val = (Properties [param_spec] as PropertyInfo).GetValue (obj, new object [0]);
}
static GetPropertyDelegate get_property_handler;
static GetPropertyDelegate GetPropertyHandler {
get {
if (get_property_handler == null)
get_property_handler = new GetPropertyDelegate (GetPropertyCallback);
return get_property_handler;
}
}
[UnmanagedFunctionPointer (CallingConvention.Cdecl)]
delegate void SetPropertyDelegate (IntPtr GObject, uint property_id, ref GLib.Value value, IntPtr pspec);
static void SetPropertyCallback(IntPtr handle, uint property_id, ref GLib.Value value, IntPtr param_spec)
{
if (!Properties.Contains (param_spec))
return;
GLib.Object obj = GLib.Object.GetObject (handle, false);
(Properties [param_spec] as PropertyInfo).SetValue (obj, value.Val, new object [0]);
}
static SetPropertyDelegate set_property_handler;
static SetPropertyDelegate SetPropertyHandler {
get {
if (set_property_handler == null)
set_property_handler = new SetPropertyDelegate (SetPropertyCallback);
return set_property_handler;
}
}
[DllImport ("libgobject-2.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
static extern void g_type_add_interface_static (IntPtr gtype, IntPtr iface_type, ref GInterfaceInfo info);
static void AddInterfaces (GType gtype, Type t)
{
foreach (Type iface in t.GetInterfaces ()) {
if (!iface.IsDefined (typeof (GInterfaceAttribute), true) || iface.IsAssignableFrom (t.BaseType))
continue;
GInterfaceAttribute attr = iface.GetCustomAttributes (typeof (GInterfaceAttribute), false) [0] as GInterfaceAttribute;
GInterfaceAdapter adapter = Activator.CreateInstance (attr.AdapterType, null) as GInterfaceAdapter;
GInterfaceInfo info = adapter.Info;
g_type_add_interface_static (gtype.Val, adapter.GType.Val, ref info);
}
}
protected internal static GType RegisterGType (System.Type t)
{
GType gtype = GType.RegisterGObjectType (t);
bool is_first_subclass = gtype.GetBaseType () == gtype.GetThresholdType ();
if (is_first_subclass) {
IntPtr class_ptr = gtype.GetClassPtr ();
GObjectClass gobject_class = (GObjectClass) Marshal.PtrToStructure (class_ptr, typeof (GObjectClass));
gobject_class.constructor_cb = ConstructorHandler;
gobject_class.get_prop_cb = GetPropertyHandler;
gobject_class.set_prop_cb = SetPropertyHandler;
Marshal.StructureToPtr (gobject_class, class_ptr, false);
}
AddProperties (gtype, t, is_first_subclass);
ConnectDefaultHandlers (gtype, t);
InvokeTypeInitializers (gtype, t);
AddInterfaces (gtype, t);
return gtype;
}
protected GType LookupGType ()
{
if (Handle != IntPtr.Zero) {
GTypeInstance obj = (GTypeInstance) Marshal.PtrToStructure (Handle, typeof (GTypeInstance));
GTypeClass klass = (GTypeClass) Marshal.PtrToStructure (obj.g_class, typeof (GTypeClass));
return new GLib.GType (klass.gtype);
} else {
return LookupGType (GetType ());
}
}
protected internal static GType LookupGType (System.Type t)
{
return GType.LookupGObjectType (t);
}
protected Object (IntPtr raw)
{
Raw = raw;
}
protected Object ()
{
CreateNativeObject (new string [0], new GLib.Value [0]);
}
[DllImport ("libgobject-2.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
static extern IntPtr g_object_new (IntPtr gtype, IntPtr dummy);
struct GParameter {
public IntPtr name;
public GLib.Value val;
}
[DllImport ("libgobject-2.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
static extern IntPtr g_object_newv (IntPtr gtype, int n_params, GParameter[] parms);
protected virtual void CreateNativeObject (string[] names, GLib.Value[] vals)
{
GType gtype = LookupGType ();
bool is_managed_subclass = gtype.ToString ().StartsWith ("__gtksharp");
GParameter[] parms = new GParameter [is_managed_subclass ? names.Length + 1 : names.Length];
for (int i = 0; i < names.Length; i++) {
parms [i].name = GLib.Marshaller.StringToPtrGStrdup (names [i]);
parms [i].val = vals [i];
}
if (is_managed_subclass) {
GCHandle gch = GCHandle.Alloc (this);
parms[names.Length].name = GLib.Marshaller.StringToPtrGStrdup ("gtk-sharp-managed-instance");
parms[names.Length].val = new GLib.Value ((IntPtr) gch);
Raw = g_object_newv (gtype.Val, parms.Length, parms);
gch.Free ();
} else {
Raw = g_object_newv (gtype.Val, parms.Length, parms);
}
foreach (GParameter p in parms)
GLib.Marshaller.Free (p.name);
}
protected virtual IntPtr Raw {
get {
return handle;
}
set {
if (handle == value)
return;
if (handle != IntPtr.Zero) {
Objects.Remove (handle);
if (tref != null) {
tref.Free ();
tref = null;
}
}
handle = value;
if (value != IntPtr.Zero) {
tref = new ToggleRef (this);
Objects [value] = tref;
}
}
}
public static GLib.GType GType {
get {
return GType.Object;
}
}
protected string TypeName {
get {
return NativeType.ToString ();
}
}
internal GLib.GType NativeType {
get {
return LookupGType ();
}
}
internal ToggleRef ToggleRef {
get {
return tref;
}
}
public IntPtr Handle {
get {
return handle;
}
}
public IntPtr OwnedHandle {
get {
return g_object_ref (handle);
}
}
Hashtable before_signals;
[Obsolete ("Replaced by GLib.Signal marshaling mechanism.")]
protected internal Hashtable BeforeSignals {
get {
if (before_signals == null)
before_signals = new Hashtable ();
return before_signals;
}
}
Hashtable after_signals;
[Obsolete ("Replaced by GLib.Signal marshaling mechanism.")]
protected internal Hashtable AfterSignals {
get {
if (after_signals == null)
after_signals = new Hashtable ();
return after_signals;
}
}
EventHandlerList before_handlers;
[Obsolete ("Replaced by GLib.Signal marshaling mechanism.")]
protected EventHandlerList BeforeHandlers {
get {
if (before_handlers == null)
before_handlers = new EventHandlerList ();
return before_handlers;
}
}
EventHandlerList after_handlers;
[Obsolete ("Replaced by GLib.Signal marshaling mechanism.")]
protected EventHandlerList AfterHandlers {
get {
if (after_handlers == null)
after_handlers = new EventHandlerList ();
return after_handlers;
}
}
[UnmanagedFunctionPointer (CallingConvention.Cdecl)]
delegate void NotifyDelegate (IntPtr handle, IntPtr pspec, IntPtr gch);
void NotifyCallback (IntPtr handle, IntPtr pspec, IntPtr gch)
{
try {
GLib.Signal sig = ((GCHandle) gch).Target as GLib.Signal;
if (sig == null)
throw new Exception("Unknown signal GC handle received " + gch);
NotifyArgs args = new NotifyArgs ();
args.Args = new object[1];
args.Args[0] = pspec;
NotifyHandler handler = (NotifyHandler) sig.Handler;
handler (GLib.Object.GetObject (handle), args);
} catch (Exception e) {
ExceptionManager.RaiseUnhandledException (e, false);
}
}
void ConnectNotification (string signal, NotifyHandler handler)
{
Signal sig = Signal.Lookup (this, signal, new NotifyDelegate (NotifyCallback));
sig.AddDelegate (handler);
}
public void AddNotification (string property, NotifyHandler handler)
{
ConnectNotification ("notify::" + property, handler);
}
public void AddNotification (NotifyHandler handler)
{
ConnectNotification ("notify", handler);
}
void DisconnectNotification (string signal, NotifyHandler handler)
{
Signal sig = Signal.Lookup (this, signal, new NotifyDelegate (NotifyCallback));
sig.RemoveDelegate (handler);
}
public void RemoveNotification (string property, NotifyHandler handler)
{
DisconnectNotification ("notify::" + property, handler);
}
public void RemoveNotification (NotifyHandler handler)
{
DisconnectNotification ("notify", handler);
}
public override int GetHashCode ()
{
return Handle.GetHashCode ();
}
public Hashtable Data {
get {
if (data == null)
data = new Hashtable ();
return data;
}
}
Hashtable persistent_data;
protected Hashtable PersistentData {
get {
if (persistent_data == null)
persistent_data = new Hashtable ();
return persistent_data;
}
}
[DllImport ("libgobject-2.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
static extern void g_object_get_property (IntPtr obj, IntPtr name, ref GLib.Value val);
protected GLib.Value GetProperty (string name)
{
Value val = new Value (this, name);
IntPtr native_name = GLib.Marshaller.StringToPtrGStrdup (name);
g_object_get_property (Raw, native_name, ref val);
GLib.Marshaller.Free (native_name);
return val;
}
[DllImport ("libgobject-2.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
static extern void g_object_set_property (IntPtr obj, IntPtr name, ref GLib.Value val);
protected void SetProperty (string name, GLib.Value val)
{
IntPtr native_name = GLib.Marshaller.StringToPtrGStrdup (name);
g_object_set_property (Raw, native_name, ref val);
GLib.Marshaller.Free (native_name);
}
[DllImport ("libgobject-2.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
static extern void g_object_notify (IntPtr obj, IntPtr property_name);
protected void Notify (string property_name)
{
IntPtr native_name = GLib.Marshaller.StringToPtrGStrdup (property_name);
g_object_notify (Handle, native_name);
GLib.Marshaller.Free (native_name);
}
protected static void OverrideVirtualMethod (GType gtype, string name, Delegate cb)
{
Signal.OverrideDefaultHandler (gtype, name, cb);
}
[DllImport ("libgobject-2.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
protected static extern void g_signal_chain_from_overridden (IntPtr args, ref GLib.Value retval);
[DllImport ("libgobject-2.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
static extern bool g_type_check_instance_is_a (IntPtr obj, IntPtr gtype);
internal static bool IsObject (IntPtr obj)
{
return g_type_check_instance_is_a (obj, GType.Object.Val);
}
struct GTypeInstance {
public IntPtr g_class;
}
struct GObject {
public GTypeInstance type_instance;
public uint ref_count;
public IntPtr qdata;
}
protected int RefCount {
get {
GObject native = (GObject) Marshal.PtrToStructure (Handle, typeof (GObject));
return (int) native.ref_count;
}
}
internal void Harden ()
{
tref.Harden ();
}
static Object ()
{
if (Environment.GetEnvironmentVariable ("GTK_SHARP_DEBUG") != null)
GLib.Log.SetLogHandler ("GLib-GObject", GLib.LogLevelFlags.All, new GLib.LogFunc (GLib.Log.PrintTraceLogFunction));
}
}
}