GtkSharp/generator/SignalHandler.cs
Mike Kestner 1c7dfb776c 2003-10-06 Mike Kestner <mkestner@ximian.com>
* generator/Signal.cs (Generate): pass gen_info to sighdnlr.Generate.
	use gen_info.AssemblyName in Args instantiation.
	* generator/SignalHandler.cs (Generate): use gen_info to open stream.
	refactor out some local vars.

svn path=/trunk/gtk-sharp/; revision=18678
2003-10-06 16:15:05 +00:00

215 lines
6.9 KiB
C#

// GtkSharp.Generation.SignalHandler.cs - The SignalHandler marshaling Class.
//
// Author: Mike Kestner <mkestner@speakeasy.net>
//
// (c) 2002-2003 Mike Kestner
namespace GtkSharp.Generation {
using System;
using System.Collections;
using System.IO;
using System.Xml;
public class SignalHandler {
XmlElement sig;
string ns;
string retval = "";
string s_ret = "";
string p_ret = "";
Parameters parms = null;
public SignalHandler (XmlElement sig, string ns)
{
this.sig = sig;
this.ns = ns;
XmlElement params_elem = sig["parameters"] as XmlElement;
if (params_elem != null)
parms = new Parameters (params_elem, ns);
}
public bool Validate ()
{
XmlElement ret_elem = sig["return-type"];
if (ret_elem == null) {
Console.Write("Missing return-type ");
return false;
}
retval = ret_elem.GetAttribute("type");
if (retval == "") {
Console.Write("Invalid return-type ");
return false;
}
s_ret = SymbolTable.Table.GetCSType(retval);
p_ret = SymbolTable.Table.GetMarshalReturnType(retval);
if ((s_ret == "") || (p_ret == "")) {
Console.Write("Funky type: " + retval);
return false;
}
if (parms == null || !parms.Validate ()) {
Console.Write("Missing parameters ");
return false;
}
return true;
}
private string ISig {
get {
string result = "";
for (int i = 0; i < parms.Count; i++) {
if (i > 0)
result += ", ";
result += (parms[i].MarshalType + " arg" + i);
}
return result;
}
}
private string BaseName {
get {
string result = SymbolTable.Table.GetName (retval);
for (int i = 0; i < parms.Count; i++) {
if (parms[i].Generatable is ObjectGen || parms[i].Generatable is InterfaceGen) {
result += "Object";
} else {
result += SymbolTable.Table.GetName(parms[i].CType);
}
}
return result;
}
}
public string CallbackName {
get {
return BaseName + "Callback";
}
}
public string DelegateName {
get {
return BaseName + "Delegate";
}
}
public string Name {
get {
return BaseName + "Signal";
}
}
public void Generate (string implementor_ns, GenerationInfo gen_info)
{
SymbolTable table = SymbolTable.Table;
StreamWriter sw = gen_info.OpenStream (implementor_ns + "Sharp." + Name);
sw.WriteLine("namespace " + implementor_ns + "Sharp {");
sw.WriteLine();
sw.WriteLine("\tusing System;");
sw.WriteLine("\tusing System.Runtime.InteropServices;");
sw.WriteLine("\tusing GtkSharp;");
sw.WriteLine();
sw.Write("\tinternal delegate " + p_ret + " ");
sw.WriteLine(DelegateName + "(" + ISig + ", int key);");
sw.WriteLine();
sw.WriteLine("\tinternal class " + Name + " : SignalCallback {");
sw.WriteLine();
sw.WriteLine("\t\tprivate static " + DelegateName + " _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(CallbackName + "(" + ISig + ", 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" + Name + " inst = (" + Name + ") _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 = parms[idx].CType;
ClassBase wrapper = table.GetClassGen (ctype);
if ((wrapper != null && !(wrapper is StructBase)) || table.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 + ", false);");
else
sw.WriteLine("\t\t\t\targs.Args[" + (idx-1) + "] = " + table.FromNative (ctype, "arg" + idx) + ";");
if ((wrapper != null && (wrapper is OpaqueGen)) || table.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, table.GetCSType (ctype), idx);
}
sw.WriteLine("\t\t\t}");
} else {
sw.WriteLine("\t\t\targs.Args[" + (idx-1) + "] = " + table.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 + ") " + table.ToNativeReturn (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, " + DelegateName + " cb, int key, IntPtr p,");
sw.WriteLine(" int flags);");
sw.WriteLine();
sw.Write("\t\tpublic " + Name + "(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 " + DelegateName + "(" + CallbackName + ");");
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();
}
}
}