f96454a364
* generator/*.cs : add gpl license blurb and clean up (c)'s. * parser/* : ditto * doc/*.cs : ditto * doc/gen-handlerargs-docs.cs : add little scripty. svn path=/trunk/gtk-sharp/; revision=30398
213 lines
6.6 KiB
C#
213 lines
6.6 KiB
C#
// GtkSharp.Generation.SignalHandler.cs - The SignalHandler marshaling Class.
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//
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// Author: Mike Kestner <mkestner@ximian.com>
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//
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// Copyright (c) 2002-2003 Mike Kestner
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// Copyright (c) 2004 Novell, Inc.
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of version 2 of the GNU General Public
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// License as published by the Free Software Foundation.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public
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// License along with this program; if not, write to the
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// Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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// Boston, MA 02111-1307, USA.
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namespace GtkSharp.Generation {
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using System;
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using System.Collections;
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using System.IO;
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using System.Xml;
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public class SignalHandler {
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XmlElement sig;
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string ns;
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string retval = "";
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string s_ret = "";
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string p_ret = "";
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Parameters parms = null;
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public SignalHandler (XmlElement sig, string ns)
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{
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this.sig = sig;
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this.ns = ns;
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XmlElement params_elem = sig["parameters"] as XmlElement;
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if (params_elem != null)
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parms = new Parameters (params_elem, ns);
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}
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public bool Validate ()
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{
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XmlElement ret_elem = sig["return-type"];
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if (ret_elem == null) {
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Console.Write("Missing return-type ");
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return false;
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}
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retval = ret_elem.GetAttribute("type");
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if (retval == "") {
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Console.Write("Invalid return-type ");
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return false;
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}
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s_ret = SymbolTable.Table.GetCSType(retval);
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p_ret = SymbolTable.Table.GetMarshalReturnType(retval);
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if ((s_ret == "") || (p_ret == "")) {
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Console.Write("Funky type: " + retval);
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return false;
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}
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if (parms == null || !parms.Validate ()) {
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Console.Write("Missing parameters ");
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return false;
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}
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return true;
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}
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private string ISig {
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get {
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string result = "";
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for (int i = 0; i < parms.Count; i++) {
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if (i > 0)
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result += ", ";
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result += (parms[i].MarshalType + " arg" + i);
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}
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return result;
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}
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}
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private string BaseName {
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get {
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string result = SymbolTable.Table.GetName (retval);
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for (int i = 0; i < parms.Count; i++) {
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if (parms[i].Generatable is ObjectGen || parms[i].Generatable is InterfaceGen) {
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result += "Object";
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} else {
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result += SymbolTable.Table.GetName(parms[i].CType);
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}
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}
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return result;
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}
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}
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public string CallbackName {
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get {
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return BaseName + "Callback";
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}
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}
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public string DelegateName {
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get {
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return BaseName + "Delegate";
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}
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}
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public string Name {
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get {
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return BaseName + "Signal";
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}
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}
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public void Generate (string implementor_ns, GenerationInfo gen_info)
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{
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SymbolTable table = SymbolTable.Table;
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StreamWriter sw = gen_info.OpenStream (implementor_ns + "Sharp." + Name);
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sw.WriteLine("namespace " + implementor_ns + "Sharp {");
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sw.WriteLine();
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sw.WriteLine("\tusing System;");
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sw.WriteLine("\tusing System.Runtime.InteropServices;");
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sw.WriteLine();
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sw.Write("\tinternal delegate " + p_ret + " ");
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sw.WriteLine(DelegateName + "(" + ISig + ", int key);");
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sw.WriteLine();
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sw.WriteLine("\tinternal class " + Name + " : GLib.SignalCallback {");
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sw.WriteLine();
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sw.WriteLine("\t\tprivate static " + DelegateName + " _Delegate;");
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sw.WriteLine();
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sw.Write("\t\tprivate static " + p_ret + " ");
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sw.WriteLine(CallbackName + "(" + ISig + ", int key)");
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sw.WriteLine("\t\t{");
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sw.WriteLine("\t\t\tif (!_Instances.Contains(key))");
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sw.WriteLine("\t\t\t\tthrow new Exception(\"Unexpected signal key \" + key);");
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sw.WriteLine();
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sw.WriteLine("\t\t\t" + Name + " inst = (" + Name + ") _Instances[key];");
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if ((s_ret == "void") && (parms.Count == 1)) {
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sw.WriteLine("\t\t\tEventHandler h = (EventHandler) inst._handler;");
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sw.WriteLine("\t\t\th (inst._obj, new EventArgs ());");
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sw.WriteLine("\t\t}");
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sw.WriteLine();
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} else {
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sw.WriteLine("\t\t\tGLib.SignalArgs args = (GLib.SignalArgs) Activator.CreateInstance (inst._argstype);");
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if (parms.Count > 1) {
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sw.WriteLine("\t\t\targs.Args = new object[" + (parms.Count-1) + "];");
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}
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for (int idx=1; idx < parms.Count; idx++) {
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string ctype = parms[idx].CType;
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ClassBase wrapper = table.GetClassGen (ctype);
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if ((wrapper != null && !(wrapper is StructBase)) || table.IsManuallyWrapped (ctype)) {
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sw.WriteLine("\t\t\tif (arg{0} == IntPtr.Zero)", idx);
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sw.WriteLine("\t\t\t\targs.Args[{0}] = null;", idx - 1);
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sw.WriteLine("\t\t\telse {");
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if ((wrapper != null) && wrapper is ObjectGen)
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sw.WriteLine("\t\t\t\targs.Args[" + (idx-1) + "] = GLib.Object.GetObject(arg" + idx + ");");
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else
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sw.WriteLine("\t\t\t\targs.Args[" + (idx-1) + "] = " + table.FromNative (ctype, "arg" + idx) + ";");
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sw.WriteLine("\t\t\t}");
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} else {
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sw.WriteLine("\t\t\targs.Args[" + (idx-1) + "] = " + table.FromNative (ctype, "arg" + idx) + ";");
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}
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}
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sw.WriteLine("\t\t\tobject[] argv = new object[2];");
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sw.WriteLine("\t\t\targv[0] = inst._obj;");
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sw.WriteLine("\t\t\targv[1] = args;");
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sw.WriteLine("\t\t\tinst._handler.DynamicInvoke(argv);");
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if (retval != "void") {
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sw.WriteLine ("\t\t\tif (args.RetVal == null)");
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if (s_ret == "bool")
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sw.WriteLine ("\t\t\t\treturn false;");
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else
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sw.WriteLine ("\t\t\t\tthrow new Exception(\"args.RetVal unset in callback\");");
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sw.WriteLine("\t\t\treturn (" + p_ret + ") " + table.ToNativeReturn (retval, "((" + s_ret + ")args.RetVal)") + ";");
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}
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sw.WriteLine("\t\t}");
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sw.WriteLine();
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}
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sw.Write("\t\tpublic " + Name + "(GLib.Object obj, ");
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sw.WriteLine("string name, Delegate eh, Type argstype, int connect_flags) : base(obj, eh, argstype)");
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sw.WriteLine("\t\t{");
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sw.WriteLine("\t\t\tif (_Delegate == null) {");
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sw.WriteLine("\t\t\t\t_Delegate = new " + DelegateName + "(" + CallbackName + ");");
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sw.WriteLine("\t\t\t}");
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sw.WriteLine("\t\t\tConnect (name, _Delegate, connect_flags);");
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sw.WriteLine("\t\t}");
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sw.WriteLine();
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sw.WriteLine("\t\tprotected override void Dispose (bool disposing)");
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sw.WriteLine("\t\t{");
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sw.WriteLine("\t\t\t_Instances.Remove(_key);");
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sw.WriteLine("\t\t\tif(_Instances.Count == 0)");
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sw.WriteLine("\t\t\t\t_Delegate = null;");
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sw.WriteLine();
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sw.WriteLine("\t\t\tDisconnect ();");
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sw.WriteLine("\t\t\tbase.Dispose (disposing);");
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sw.WriteLine("\t\t}");
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sw.WriteLine("\t}");
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sw.WriteLine("}");
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sw.Close();
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}
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}
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}
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