// GtkSharp.Generation.SignalHandler.cs - The SignalHandler marshaling Class.
//
// Author: Mike Kestner <mkestner@speakeasy.net>
//
// (c) 2002 Mike Kestner
namespace GtkSharp.Generation {
using System;
using System.Collections;
using System.IO;
using System.Xml;
public class SignalHandler {
public static String GetName(XmlElement sig, string ns, bool generate)
{
XmlElement ret_elem = sig["return-type"];
if (ret_elem == null) {
Console.Write("Missing return-type ");
return "";
}
string retval = ret_elem.GetAttribute("type");
if (retval == "") {
Console.Write("Invalid return-type ");
return "";
}
string s_ret = SymbolTable.GetCSType(retval);
string p_ret = SymbolTable.GetMarshalReturnType(retval);
if ((s_ret == "") || (p_ret == "")) {
Console.Write("Funky type: " + retval);
return "";
}
string key = retval;
string pinv = "";
string name = SymbolTable.GetName(retval);
int pcnt = 0;
ArrayList parms = new ArrayList();
XmlElement params_elem = sig["parameters"];
if (params_elem == null) {
Console.Write("Missing parameters ");
return "";
}
foreach (XmlNode parm in params_elem.ChildNodes) {
if (!(parm is XmlElement) || parm.Name != "parameter") continue;
XmlElement elem = (XmlElement) parm;
string type = elem.GetAttribute("type");
string ptype = SymbolTable.GetMarshalType(type);
if (ptype == "") {
Console.Write("Funky type: " + type);
return "";
}
if (pcnt > 0) {
pinv += ", ";
}
pinv += (ptype + " arg" + pcnt);
parms.Add(type);
if (SymbolTable.IsObject(type) || SymbolTable.IsInterface(type)) {
name += "Object";
key += "Object";
} else {
name += SymbolTable.GetName(type);
key += type;
}
pcnt++;
}
String sname = name + "Signal";
String dname = name + "Delegate";
String cbname = name + "Callback";
if (!generate)
return ns + "." + sname;
char sep = Path.DirectorySeparatorChar;
String dir = ".." + sep + ns.ToLower() + sep + "generated";
if (!Directory.Exists(dir)) {
Directory.CreateDirectory(dir);
}
String filename = dir + sep + ns + "Sharp." + sname + ".cs";
FileStream stream = new FileStream (filename, FileMode.Create, FileAccess.Write);
StreamWriter sw = new StreamWriter (stream);
sw.WriteLine ("// Generated File. Do not modify.");
sw.WriteLine ("// <c> 2001-2002 Mike Kestner");
sw.WriteLine ();
sw.WriteLine("namespace " + ns + "Sharp {");
sw.WriteLine();
sw.WriteLine("\tusing System;");
sw.WriteLine("\tusing System.Runtime.InteropServices;");
sw.WriteLine("\tusing GtkSharp;");
sw.WriteLine();
sw.Write("\tpublic delegate " + p_ret + " ");
sw.WriteLine(dname + "(" + pinv + ", int key);");
sw.WriteLine();
sw.WriteLine("\tpublic class " + sname + " : SignalCallback {");
sw.WriteLine();
sw.WriteLine("\t\tprivate static " + dname + " _Delegate;");
sw.WriteLine();
sw.WriteLine("\t\tprivate IntPtr _raw;");
sw.WriteLine("\t\tprivate uint _HandlerID;");
sw.WriteLine();
sw.Write("\t\tprivate static " + p_ret + " ");
sw.WriteLine(cbname + "(" + pinv + ", int key)");
sw.WriteLine("\t\t{");
sw.WriteLine("\t\t\tif (!_Instances.Contains(key))");
sw.WriteLine("\t\t\t\tthrow new Exception(\"Unexpected signal key \" + key);");
sw.WriteLine();
sw.WriteLine("\t\t\t" + sname + " inst = (" + sname + ") _Instances[key];");
if ((s_ret == "void") && (parms.Count == 1)) {
sw.WriteLine("\t\t\tEventHandler h = (EventHandler) inst._handler;");
sw.WriteLine("\t\t\th (inst._obj, new EventArgs ());");
sw.WriteLine("\t\t}");
sw.WriteLine();
} else {
sw.WriteLine("\t\t\tSignalArgs args = (SignalArgs) Activator.CreateInstance (inst._argstype);");
if (parms.Count > 1) {
sw.WriteLine("\t\t\targs.Args = new object[" + (parms.Count-1) + "];");
}
for (int idx=1; idx < parms.Count; idx++) {
string ctype = (string) parms[idx];
ClassBase wrapper = SymbolTable.GetClassGen (ctype);
if ((wrapper != null && !(wrapper is StructBase)) || SymbolTable.IsManuallyWrapped (ctype)) {
sw.WriteLine("\t\t\tif (arg{0} == IntPtr.Zero)", idx);
sw.WriteLine("\t\t\t\targs.Args[{0}] = null;", idx - 1);
sw.WriteLine("\t\t\telse {");
if (wrapper != null && wrapper is ObjectGen)
sw.WriteLine("\t\t\t\targs.Args[" + (idx-1) + "] = GLib.Object.GetObject(arg" + idx + ");");
else
sw.WriteLine("\t\t\t\targs.Args[" + (idx-1) + "] = " + SymbolTable.FromNative (ctype, "arg" + idx) + ";");
if ((wrapper != null && (wrapper is OpaqueGen)) || SymbolTable.IsManuallyWrapped (ctype)) {
sw.WriteLine("\t\t\t\tif (args.Args[" + (idx-1) + "] == null)");
sw.WriteLine("\t\t\t\t\targs.Args[{0}] = new {1}(arg{2});", idx-1, SymbolTable.GetCSType (ctype), idx);
}
sw.WriteLine("\t\t\t}");
} else {
sw.WriteLine("\t\t\targs.Args[" + (idx-1) + "] = " + SymbolTable.FromNative (ctype, "arg" + idx) + ";");
}
}
sw.WriteLine("\t\t\tobject[] argv = new object[2];");
sw.WriteLine("\t\t\targv[0] = inst._obj;");
sw.WriteLine("\t\t\targv[1] = args;");
sw.WriteLine("\t\t\tinst._handler.DynamicInvoke(argv);");
if (retval != "void") {
sw.WriteLine ("\t\t\tif (args.RetVal == null)");
if (s_ret == "bool")
sw.WriteLine ("\t\t\t\treturn false;");
else
sw.WriteLine ("\t\t\t\tthrow new Exception(\"args.RetVal unset in callback\");");
sw.WriteLine("\t\t\treturn (" + p_ret + ") " + SymbolTable.CallByName (retval, "((" + s_ret + ")args.RetVal)") + ";");
}
sw.WriteLine("\t\t}");
sw.WriteLine();
}
sw.WriteLine("\t\t[DllImport(\"libgobject-2.0-0.dll\")]");
sw.Write("\t\tstatic extern uint g_signal_connect_data(");
sw.Write("IntPtr obj, String name, " + dname + " cb, int key, IntPtr p,");
sw.WriteLine(" int flags);");
sw.WriteLine();
sw.Write("\t\tpublic " + sname + "(GLib.Object obj, IntPtr raw, ");
sw.WriteLine("String name, Delegate eh, Type argstype) : base(obj, eh, argstype)");
sw.WriteLine("\t\t{");
sw.WriteLine("\t\t\tif (_Delegate == null) {");
sw.WriteLine("\t\t\t\t_Delegate = new " + dname + "(" + cbname + ");");
sw.WriteLine("\t\t\t}");
sw.WriteLine("\t\t\t_raw = raw;");
sw.Write("\t\t\t_HandlerID = g_signal_connect_data(raw, name, ");
sw.WriteLine("_Delegate, _key, new IntPtr(0), 0);");
sw.WriteLine("\t\t}");
sw.WriteLine();
sw.WriteLine("\t\t[DllImport(\"libgobject-2.0-0.dll\")]");
sw.WriteLine("\t\tstatic extern void g_signal_handler_disconnect (IntPtr instance, uint handler);");
sw.WriteLine();
sw.WriteLine("\t\tprotected override void Dispose (bool disposing)");
sw.WriteLine("\t\t{");
sw.WriteLine("\t\t\t_Instances.Remove(_key);");
sw.WriteLine("\t\t\tif(_Instances.Count == 0)");
sw.WriteLine("\t\t\t\t_Delegate = null;");
sw.WriteLine();
sw.WriteLine("\t\t\tg_signal_handler_disconnect (_raw, _HandlerID);");
sw.WriteLine("\t\t\tbase.Dispose (disposing);");
sw.WriteLine("\t\t}");
sw.WriteLine("\t}");
sw.WriteLine("}");
sw.Close();
return ns + "Sharp." + sname;
}
}
}