GtkSharp/glib/Object.cs
Mike Kestner f5e6d14520 2007-11-28 Mike Kestner <mkestner@novell.com>
* glib/Object.cs: take ref using method param to avoid
	NREs. [Fixes #344250]

svn path=/trunk/gtk-sharp/; revision=90412
2007-11-29 02:02:24 +00:00

515 lines
13 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;
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")]
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;
try {
ToggleRef toggle_ref = Objects [Handle] as ToggleRef;
if (toggle_ref != null)
toggle_ref.Free ();
} catch (Exception e) {
Console.WriteLine ("Exception while disposing a " + this + " in Gtk#");
throw e;
}
Objects.Remove (Handle);
handle = IntPtr.Zero;
GC.SuppressFinalize (this);
}
[DllImport("libgobject-2.0-0.dll")]
static extern void 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);
object[] parms = new object [1];
parms [0] = gtype;
connector.Invoke (null, parms);
break;
}
}
}
private static void InvokeClassInitializers (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);
}
for (Type curr = t; curr != typeof(GLib.Object); curr = curr.BaseType) {
if (curr.Assembly.IsDefined (typeof (IgnoreClassInitializersAttribute), false))
continue;
foreach (MethodInfo minfo in curr.GetMethods(flags))
if (minfo.IsDefined (typeof (ClassInitializerAttribute), true))
minfo.Invoke (null, parms);
}
}
[DllImport("libgobject-2.0-0.dll")]
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);
Console.WriteLine (adapter);
}
}
[DllImport("glibsharpglue-2")]
static extern IntPtr gtksharp_register_type (IntPtr name, IntPtr parent_type);
static int type_uid;
static string BuildEscapedName (System.Type t)
{
string qn = t.FullName;
// Just a random guess
StringBuilder sb = new StringBuilder (20 + qn.Length);
sb.Append ("__gtksharp_");
sb.Append (type_uid++);
sb.Append ("_");
foreach (char c in qn) {
if ((c >= '0' && c <= '9') || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'))
sb.Append (c);
else if (c == '.')
sb.Append ('_');
else if ((uint) c <= byte.MaxValue) {
sb.Append ('+');
sb.Append (((byte) c).ToString ("x2"));
} else {
sb.Append ('-');
sb.Append (((uint) c).ToString ("x4"));
}
}
return sb.ToString ();
}
protected static GType RegisterGType (System.Type t)
{
GType parent_gtype = LookupGType (t.BaseType);
string name = BuildEscapedName (t);
IntPtr native_name = GLib.Marshaller.StringToPtrGStrdup (name);
GType gtype = new GType (gtksharp_register_type (native_name, parent_gtype.Val));
GLib.Marshaller.Free (native_name);
GLib.GType.Register (gtype, t);
ConnectDefaultHandlers (gtype, t);
InvokeClassInitializers (gtype, t);
AddInterfaces (gtype, t);
g_types[t] = gtype;
return gtype;
}
static Hashtable g_types = new Hashtable ();
protected GType LookupGType ()
{
return LookupGType (GetType ());
}
protected internal static GType LookupGType (System.Type t)
{
if (g_types.Contains (t))
return (GType) g_types [t];
PropertyInfo pi = t.GetProperty ("GType", BindingFlags.DeclaredOnly | BindingFlags.Static | BindingFlags.Public);
if (pi != null)
return (GType) pi.GetValue (null, null);
return RegisterGType (t);
}
protected Object (IntPtr raw)
{
Raw = raw;
}
protected Object ()
{
CreateNativeObject (new string [0], new GLib.Value [0]);
}
[DllImport("libgobject-2.0-0.dll")]
static extern IntPtr g_object_new (IntPtr gtype, IntPtr dummy);
[Obsolete]
protected Object (GType gtype)
{
Raw = g_object_new (gtype.Val, IntPtr.Zero);
}
[DllImport("glibsharpglue-2")]
static extern IntPtr gtksharp_object_newv (IntPtr gtype, int n_params, IntPtr[] names, GLib.Value[] vals);
protected virtual void CreateNativeObject (string[] names, GLib.Value[] vals)
{
IntPtr[] native_names = new IntPtr [names.Length];
for (int i = 0; i < names.Length; i++)
native_names [i] = GLib.Marshaller.StringToPtrGStrdup (names [i]);
Raw = gtksharp_object_newv (LookupGType ().Val, names.Length, native_names, vals);
foreach (IntPtr p in native_names)
GLib.Marshaller.Free (p);
}
protected virtual IntPtr Raw {
get {
return handle;
}
set {
if (handle == value)
return;
if (handle != IntPtr.Zero) {
ToggleRef tref = Objects [handle] as ToggleRef;
if (tref != null)
tref.Free ();
Objects.Remove (handle);
}
handle = value;
if (value != IntPtr.Zero)
Objects [value] = new ToggleRef (this);
}
}
public static GLib.GType GType {
get {
return GType.Object;
}
}
[DllImport("glibsharpglue-2")]
static extern IntPtr gtksharp_get_type_name (IntPtr raw);
protected string TypeName {
get {
return Marshaller.Utf8PtrToString (gtksharp_get_type_name (Raw));
}
}
internal GLib.GType NativeType {
get {
return LookupGType ();
}
}
public IntPtr Handle {
get {
return handle;
}
}
Hashtable signals;
internal Hashtable Signals {
get {
if (signals == null)
signals = new Hashtable ();
return signals;
}
}
Hashtable before_signals;
[Obsolete ("Replaced by GLib.Signal marshaling mechanism.")]
protected 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 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;
}
}
[CDeclCallback]
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")]
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")]
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("glibsharpglue-2")]
static extern void gtksharp_override_virtual_method (IntPtr gtype, IntPtr name, Delegate cb);
protected static void OverrideVirtualMethod (GType gtype, string name, Delegate cb)
{
IntPtr native_name = GLib.Marshaller.StringToPtrGStrdup (name);
gtksharp_override_virtual_method (gtype.Val, native_name, cb);
GLib.Marshaller.Free (native_name);
}
[DllImport("libgobject-2.0-0.dll")]
protected static extern void g_signal_chain_from_overridden (IntPtr args, ref GLib.Value retval);
[DllImport("glibsharpglue-2")]
static extern bool gtksharp_is_object (IntPtr obj);
internal static bool IsObject (IntPtr obj)
{
return gtksharp_is_object (obj);
}
[DllImport("glibsharpglue-2")]
static extern int gtksharp_object_get_ref_count (IntPtr obj);
protected int RefCount {
get {
return gtksharp_object_get_ref_count (Handle);
}
}
}
}