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// GtkSharp.Generation.VirtualMethod.cs - The VirtualMethod Generatable.
//
// Author: Mike Kestner <mkestner@novell.com>
//
// Copyright (c) 2003-2004 Novell, Inc.
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of version 2 of the 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
// General Public License for more details.
//
// You should have received a copy of the GNU 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 GtkSharp.Generation {
using System;
using System.Collections;
using System.IO;
using System.Xml;
// FIXME: handle static VMs
public class VirtualMethod : MethodBase {
XmlElement elem;
ReturnValue retval;
Parameters parms;
public VirtualMethod (XmlElement elem, ClassBase container_type) : base (elem, container_type)
{
this.elem = elem;
retval = new ReturnValue (elem ["return-type"]);
parms = new Parameters (elem["parameters"]);
parms.HideData = true;
}
public bool IsGetter {
get {
return HasGetterName && ((!retval.IsVoid && parms.Count == 1) || (retval.IsVoid && parms.Count == 2 && parms [1].PassAs == "out"));
}
}
public bool IsSetter {
get {
if (!HasSetterName || !retval.IsVoid)
return false;
if (parms.Count == 2 || (parms.Count == 4 && parms [1].Scope == "notified"))
return true;
else
return false;
}
}
public string MarshalReturnType {
get {
return SymbolTable.Table.GetToNativeReturnType (elem["return-type"].GetAttribute("type"));
}
}
public void GenerateCallback (StreamWriter sw)
{
if (!Validate ())
return;
ManagedCallString call = new ManagedCallString (parms, true);
string type = parms [0].CSType + "Implementor";
string name = parms [0].Name;
string call_string = "__obj." + Name + " (" + call + ")";
if (IsGetter)
call_string = "__obj." + (Name.StartsWith ("Get") ? Name.Substring (3) : Name);
else if (IsSetter)
call_string = "__obj." + Name.Substring (3) + " = " + call;
sw.WriteLine ("\t\t[UnmanagedFunctionPointer (CallingConvention.Cdecl)]");
sw.WriteLine ("\t\tdelegate " + MarshalReturnType + " " + Name + "Delegate (" + parms.ImportSignature + ");");
sw.WriteLine ();
sw.WriteLine ("\t\tstatic " + MarshalReturnType + " " + Name + "Callback (" + parms.ImportSignature + ")");
sw.WriteLine ("\t\t{");
string unconditional = call.Unconditional ("\t\t\t");
if (unconditional.Length > 0)
sw.WriteLine (unconditional);
sw.WriteLine ("\t\t\ttry {");
sw.WriteLine ("\t\t\t\t" + type + " __obj = GLib.Object.GetObject (" + name + ", false) as " + type + ";");
sw.Write (call.Setup ("\t\t\t\t"));
if (retval.IsVoid) {
if (IsGetter) {
Parameter p = parms [1];
string out_name = p.Name;
if (p.MarshalType != p.CSType)
out_name = "my" + out_name;
sw.WriteLine ("\t\t\t\t" + out_name + " = " + call_string + ";");
} else
sw.WriteLine ("\t\t\t\t" + call_string + ";");
} else
sw.WriteLine ("\t\t\t\t" + retval.CSType + " __result = " + call_string + ";");
bool fatal = parms.HasOutParam || !retval.IsVoid;
sw.Write (call.Finish ("\t\t\t\t"));
if (!retval.IsVoid)
sw.WriteLine ("\t\t\t\treturn " + retval.ToNative ("__result") + ";");
sw.WriteLine ("\t\t\t} catch (Exception e) {");
sw.WriteLine ("\t\t\t\tGLib.ExceptionManager.RaiseUnhandledException (e, " + (fatal ? "true" : "false") + ");");
if (fatal) {
sw.WriteLine ("\t\t\t\t// NOTREACHED: above call does not return.");
sw.WriteLine ("\t\t\t\tthrow e;");
}
sw.WriteLine ("\t\t\t}");
sw.WriteLine ("\t\t}");
}
public void GenerateDeclaration (StreamWriter sw, VirtualMethod complement)
{
VMSignature vmsig = new VMSignature (parms);
if (IsGetter) {
string name = Name.StartsWith ("Get") ? Name.Substring (3) : Name;
string type = retval.IsVoid ? parms [1].CSType : retval.CSType;
if (complement != null && complement.parms [1].CSType == type)
sw.WriteLine ("\t\t" + type + " " + name + " { get; set; }");
else {
sw.WriteLine ("\t\t" + type + " " + name + " { get; }");
if (complement != null)
sw.WriteLine ("\t\t" + complement.retval.CSType + " " + complement.Name + " (" + (new VMSignature (complement.parms)) + ");");
}
} else if (IsSetter)
sw.WriteLine ("\t\t" + parms[1].CSType + " " + Name.Substring (3) + " { set; }");
else
sw.WriteLine ("\t\t" + retval.CSType + " " + Name + " (" + vmsig + ");");
}
enum ValidState {
Unvalidated,
Invalid,
Valid
}
ValidState vstate = ValidState.Unvalidated;
public bool IsValid {
get {
if (vstate == ValidState.Unvalidated)
return Validate ();
else
return vstate == ValidState.Valid;
}
}
public override bool Validate ()
{
if (!parms.Validate () || !retval.Validate ()) {
Console.Write ("in virtual method " + Name + " ");
vstate = ValidState.Invalid;
return false;
}
vstate = ValidState.Valid;
return true;
}
}
}
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