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// Builder.custom - customizations to Gtk.Builder
//
// Authors: Stephane Delcroix <stephane@delcroix.org>
// The biggest part of this code is adapted from glade#, by
// Ricardo Fernández Pascual <ric@users.sourceforge.net>
// Rachel Hestilow <hestilow@ximian.com>
//
// Copyright (c) 2008, 2009 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.
[System.Serializable]
public class HandlerNotFoundException : SystemException
{
string handler_name;
string signal_name;
System.Reflection.EventInfo evnt;
Type delegate_type;
public HandlerNotFoundException (string handler_name, string signal_name,
System.Reflection.EventInfo evnt, Type delegate_type)
: this (handler_name, signal_name, evnt, delegate_type, null)
{
}
public HandlerNotFoundException (string handler_name, string signal_name,
System.Reflection.EventInfo evnt, Type delegate_type, Exception inner)
: base ("No handler " + handler_name + " found for signal " + signal_name,
inner)
{
this.handler_name = handler_name;
this.signal_name = signal_name;
this.evnt = evnt;
this.delegate_type = delegate_type;
}
public HandlerNotFoundException (string message, string handler_name, string signal_name,
System.Reflection.EventInfo evnt, Type delegate_type)
: base ((message != null) ? message : "No handler " + handler_name + " found for signal " + signal_name,
null)
{
this.handler_name = handler_name;
this.signal_name = signal_name;
this.evnt = evnt;
this.delegate_type = delegate_type;
}
protected HandlerNotFoundException (System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context)
: base (info, context)
{
handler_name = info.GetString ("HandlerName");
signal_name = info.GetString ("SignalName");
evnt = info.GetValue ("Event", typeof (System.Reflection.EventInfo)) as System.Reflection.EventInfo;
delegate_type = info.GetValue ("DelegateType", typeof (Type)) as Type;
}
public string HandlerName
{
get {
return handler_name;
}
}
public string SignalName
{
get {
return signal_name;
}
}
public System.Reflection.EventInfo Event
{
get {
return evnt;
}
}
public Type DelegateType
{
get {
return delegate_type;
}
}
public override void GetObjectData (System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context)
{
base.GetObjectData (info, context);
info.AddValue ("HandlerName", handler_name);
info.AddValue ("SignalName", signal_name);
info.AddValue ("Event", evnt);
info.AddValue ("DelegateType", delegate_type);
}
}
[AttributeUsage (AttributeTargets.Field)]
public class ObjectAttribute : Attribute
{
private string name;
private bool specified;
public ObjectAttribute (string name)
{
specified = true;
this.name = name;
}
public ObjectAttribute ()
{
specified = false;
}
public string Name
{
get { return name; }
}
public bool Specified
{
get { return specified; }
}
}
public IntPtr GetRawObject(string name) {
IntPtr native_name = GLib.Marshaller.StringToPtrGStrdup (name);
IntPtr raw_ret = gtk_builder_get_object(Handle, native_name);
GLib.Marshaller.Free (native_name);
return raw_ret;
}
public Builder (System.IO.Stream s) : this (s, null)
{
}
public Builder (System.IO.Stream s, string translation_domain)
{
if (s == null)
throw new ArgumentNullException ("s");
int size = (int) s.Length;
byte[] buffer = new byte[size];
s.Read (buffer, 0, size);
s.Close ();
AddFromString(System.Text.Encoding.UTF8.GetString (buffer));
TranslationDomain = translation_domain;
}
public Builder (string resource_name) : this (resource_name, null)
{
}
public Builder (string resource_name, string translation_domain) : this (System.Reflection.Assembly.GetEntryAssembly (), resource_name, translation_domain)
{
}
public Builder (System.Reflection.Assembly assembly, string resource_name, string translation_domain) : this ()
{
if (GetType() != typeof (Builder))
throw new InvalidOperationException ("Cannot chain to this constructor from subclasses.");
if (assembly == null)
assembly = System.Reflection.Assembly.GetCallingAssembly ();
System.IO.Stream s = assembly.GetManifestResourceStream (resource_name);
if (s == null)
throw new ArgumentException ("Cannot get resource file '" + resource_name + "'",
"resource_name");
int size = (int) s.Length;
byte[] buffer = new byte[size];
s.Read (buffer, 0, size);
s.Close ();
AddFromString(System.Text.Encoding.UTF8.GetString (buffer));
TranslationDomain = translation_domain;
}
public void Autoconnect (object handler)
{
BindFields (handler);
(new SignalConnector (this, handler)).ConnectSignals ();
}
public void Autoconnect (Type handler_class)
{
BindFields (handler_class);
(new SignalConnector (this, handler_class)).ConnectSignals ();
}
class SignalConnector
{
Builder builder;
Type handler_type;
object handler;
public SignalConnector (Builder builder, object handler)
{
this.builder = builder;
this.handler = handler;
handler_type = handler.GetType ();
}
public SignalConnector (Builder builder, Type handler_type)
{
this.builder = builder;
this.handler = null;
this.handler_type = handler_type;
}
[DllImport("libgtk-win32-2.0-0.dll")]
static extern void gtk_builder_connect_signals_full(IntPtr raw, GtkBeansSharp.BuilderConnectFuncNative func, IntPtr user_data);
public void ConnectSignals() {
GtkBeansSharp.BuilderConnectFuncWrapper func_wrapper = new GtkBeansSharp.BuilderConnectFuncWrapper (new GtkBeans.BuilderConnectFunc (ConnectFunc));
gtk_builder_connect_signals_full(builder.Handle, func_wrapper.NativeDelegate, IntPtr.Zero);
}
public void ConnectFunc (Builder builder, GLib.Object objekt, string signal_name, string handler_name, GLib.Object connect_object, GLib.ConnectFlags flags)
{
/* search for the event to connect */
System.Reflection.MemberInfo[] evnts = objekt.GetType ().
FindMembers (System.Reflection.MemberTypes.Event,
System.Reflection.BindingFlags.Instance
| System.Reflection.BindingFlags.Static
| System.Reflection.BindingFlags.Public
| System.Reflection.BindingFlags.NonPublic,
new System.Reflection.MemberFilter (SignalFilter), signal_name);
foreach (System.Reflection.EventInfo ei in evnts) {
bool connected = false;
System.Reflection.MethodInfo add = ei.GetAddMethod ();
System.Reflection.ParameterInfo[] addpi = add.GetParameters ();
if (addpi.Length == 1) { /* this should be always true, unless there's something broken */
Type delegate_type = addpi[0].ParameterType;
/* look for an instance method */
if (connect_object != null || handler != null)
try {
Delegate d = Delegate.CreateDelegate (delegate_type, connect_object != null ? connect_object : handler, handler_name);
add.Invoke (objekt, new object[] { d } );
connected = true;
} catch (ArgumentException) { /* ignore if there is not such instance method */
}
/* look for a static method if no instance method has been found */
if (!connected && handler_type != null)
try {
Delegate d = Delegate.CreateDelegate (delegate_type, handler_type, handler_name);
add.Invoke (objekt, new object[] { d } );
connected = true;
} catch (ArgumentException) { /* ignore if there is not such static method */
}
if (!connected) {
string msg = ExplainError (ei.Name, delegate_type, handler_type, handler_name);
throw new HandlerNotFoundException (msg, handler_name, signal_name, ei, delegate_type);
}
}
}
}
static bool SignalFilter (System.Reflection.MemberInfo m, object filterCriteria)
{
string signame = (filterCriteria as string);
object[] attrs = m.GetCustomAttributes (typeof (GLib.SignalAttribute), false);
if (attrs.Length > 0)
{
foreach (GLib.SignalAttribute a in attrs)
{
if (signame == a.CName)
{
return true;
}
}
return false;
}
else
{
/* this tries to match the names when no attibutes are present.
It is only a fallback. */
signame = signame.ToLower ().Replace ("_", "");
string evname = m.Name.ToLower ();
return signame == evname;
}
}
static string GetSignature (System.Reflection.MethodInfo method)
{
if (method == null)
return null;
System.Reflection.ParameterInfo [] parameters = method.GetParameters ();
System.Text.StringBuilder sb = new System.Text.StringBuilder ();
sb.Append ('(');
foreach (System.Reflection.ParameterInfo info in parameters) {
sb.Append (info.ParameterType.ToString ());
sb.Append (',');
}
if (sb.Length != 0)
sb.Length--;
sb.Append (')');
return sb.ToString ();
}
static string GetSignature (Type delegate_type)
{
System.Reflection.MethodInfo method = delegate_type.GetMethod ("Invoke");
return GetSignature (method);
}
const System.Reflection.BindingFlags flags = System.Reflection.BindingFlags.NonPublic |
System.Reflection.BindingFlags.Public |
System.Reflection.BindingFlags.Static |
System.Reflection.BindingFlags.Instance;
static string GetSignature (Type klass, string method_name)
{
try {
System.Reflection.MethodInfo method = klass.GetMethod (method_name, flags);
return GetSignature (method);
} catch {
// May be more than one method with that name and none matches
return null;
}
}
static string ExplainError (string event_name, Type deleg, Type klass, string method)
{
if (deleg == null || klass == null || method == null)
return null;
System.Text.StringBuilder sb = new System.Text.StringBuilder ();
string expected = GetSignature (deleg);
string actual = GetSignature (klass, method);
if (actual == null)
return null;
sb.AppendFormat ("The handler for the event {0} should take '{1}', " +
"but the signature of the provided handler ('{2}') is '{3}'\n",
event_name, expected, method, actual);
return sb.ToString ();
}
}
void BindFields (object target)
{
BindFields (target, target.GetType ());
}
void BindFields (Type type)
{
BindFields (null, type);
}
void BindFields (object target, Type type)
{
System.Reflection.BindingFlags flags = System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.DeclaredOnly;
if (target != null)
flags |= System.Reflection.BindingFlags.Instance;
else
flags |= System.Reflection.BindingFlags.Static;
do {
System.Reflection.FieldInfo[] fields = type.GetFields (flags);
if (fields == null)
return;
foreach (System.Reflection.FieldInfo field in fields)
{
object[] attrs = field.GetCustomAttributes (typeof (ObjectAttribute), false);
if (attrs == null || attrs.Length == 0)
continue;
// The widget to field binding must be 1:1, so only check
// the first attribute.
ObjectAttribute attr = (ObjectAttribute) attrs[0];
GLib.Object gobject;
if (attr.Specified)
gobject = GetObject (attr.Name);
else
gobject = GetObject (field.Name);
if (gobject != null)
try {
field.SetValue (target, gobject, flags, null, null);
} catch (Exception e) {
Console.WriteLine ("Unable to set value for field " + field.Name);
throw e;
}
}
type = type.BaseType;
}
while (type != typeof(object) && type != null);
}