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// GtkSharp.Generation.DefaultSignalHandler.cs - The default signal handler generatable
//
// Author: Christian Hoff <christian_hoff@gmx.net>
//
// Copyright (c) 2008 Novell Inc.
// Copyright (c) 2008-2009 Christian Hoff
//
// 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.IO;
using System.Xml;
public class DefaultSignalHandler : GObjectVM {
private string signal_name;
public DefaultSignalHandler (XmlElement elem, ObjectBase container_type) : base (elem, container_type)
{
signal_name = elem.GetAttribute ("cname");
}
public override string CName {
get {
return elem.GetAttribute ("field_name");
}
}
protected override bool CanGenerate (GenerationInfo gen_info, ObjectBase implementor)
{
return true;
}
protected override void GenerateOverride (GenerationInfo gen_info, ObjectBase implementor)
{
StreamWriter sw = gen_info.Writer;
if (!base.CanGenerate (gen_info, implementor)) {
GenerateOverrideBody (sw);
sw.WriteLine ("\t\t\tOverrideVirtualMethod (gtype, \"{0}\", callback);", signal_name);
sw.WriteLine ("\t\t}");
} else
base.GenerateOverride (gen_info, implementor);
}
protected override void GenerateUnmanagedInvocation (GenerationInfo gen_info, ObjectBase implementor)
{
if (!base.CanGenerate (gen_info, implementor))
GenerateChainVirtualMethod (gen_info.Writer, implementor);
else
base.GenerateUnmanagedInvocation (gen_info, implementor);
}
private void GenerateChainVirtualMethod (StreamWriter sw, ObjectBase implementor)
{
GenerateMethodBody (sw, implementor);
if (retval.IsVoid)
sw.WriteLine ("\t\t\tGLib.Value ret = GLib.Value.Empty;");
else
sw.WriteLine ("\t\t\tGLib.Value ret = new GLib.Value (" + ReturnGType + ");");
sw.WriteLine ("\t\t\tGLib.ValueArray inst_and_params = new GLib.ValueArray (" + (parms.Count + 1) + ");");
sw.WriteLine ("\t\t\tGLib.Value[] vals = new GLib.Value [" + (parms.Count + 1) + "];");
sw.WriteLine ("\t\t\tvals [0] = new GLib.Value (this);");
sw.WriteLine ("\t\t\tinst_and_params.Append (vals [0]);");
string cleanup = "";
for (int i = 0; i < parms.Count; i++) {
Parameter p = parms [i];
if (p.PassAs != "") {
if (SymbolTable.Table.IsBoxed (p.CType)) {
if (p.PassAs == "ref")
sw.WriteLine ("\t\t\tvals [" + (i + 1) + "] = new GLib.Value (" + p.Name + ");");
else
sw.WriteLine ("\t\t\tvals [" + (i + 1) + "] = new GLib.Value ((GLib.GType)typeof (" + p.CSType + "));");
cleanup += "\t\t\t" + p.Name + " = (" + p.CSType + ") vals [" + i + "];\n";
} else {
if (p.PassAs == "ref")
sw.WriteLine ("\t\t\tIntPtr " + p.Name + "_ptr = GLib.Marshaller.StructureToPtrAlloc (" + p.Generatable.CallByName (p.Name) + ");");
else
sw.WriteLine ("\t\t\tIntPtr " + p.Name + "_ptr = Marshal.AllocHGlobal (Marshal.SizeOf (typeof (" + p.MarshalType + ")));");
sw.WriteLine ("\t\t\tvals [" + (i + 1) + "] = new GLib.Value (" + p.Name + "_ptr);");
cleanup += "\t\t\t" + p.Name + " = " + p.FromNative ("(" + p.MarshalType + ") Marshal.PtrToStructure (" + p.Name + "_ptr, typeof (" + p.MarshalType + "))") + ";\n";
cleanup += "\t\t\tMarshal.FreeHGlobal (" + p.Name + "_ptr);\n";
}
} else if (p.IsLength && i > 0 && parms [i - 1].IsString)
sw.WriteLine ("\t\t\tvals [" + (i + 1) + "] = new GLib.Value (System.Text.Encoding.UTF8.GetByteCount (" + parms [i-1].Name + "));");
else
sw.WriteLine ("\t\t\tvals [" + (i + 1) + "] = new GLib.Value (" + p.Name + ");");
sw.WriteLine ("\t\t\tinst_and_params.Append (vals [" + (i + 1) + "]);");
}
sw.WriteLine ("\t\t\tg_signal_chain_from_overridden (inst_and_params.ArrayPtr, ref ret);");
if (cleanup != "")
sw.WriteLine (cleanup);
sw.WriteLine ("\t\t\tforeach (GLib.Value v in vals)");
sw.WriteLine ("\t\t\t\tv.Dispose ();");
if (!retval.IsVoid) {
IGeneratable igen = SymbolTable.Table [retval.CType];
sw.WriteLine ("\t\t\t" + retval.CSType + " result = (" + (igen is EnumGen ? retval.CSType + ") (Enum" : retval.CSType) + ") ret;");
sw.WriteLine ("\t\t\tret.Dispose ();");
sw.WriteLine ("\t\t\treturn result;");
}
sw.WriteLine ("\t\t}\n");
}
private string ReturnGType {
get {
IGeneratable igen = SymbolTable.Table [retval.CType];
if (igen is ObjectGen)
return "GLib.GType.Object";
if (igen is BoxedGen)
return retval.CSType + ".GType";
if (igen is EnumGen)
return retval.CSType + "GType.GType";
switch (retval.CSType) {
case "bool":
return "GLib.GType.Boolean";
case "string":
return "GLib.GType.String";
case "int":
return "GLib.GType.Int";
default:
throw new Exception (retval.CSType);
}
}
}
}
}
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