320 lines
13 KiB
C#
320 lines
13 KiB
C#
// GtkSharp.Generation.Signal.cs - The Signal Generatable.
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//
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// Author: Mike Kestner <mkestner@speakeasy.net>
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//
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// Copyright (c) 2001-2003 Mike Kestner
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// Copyright (c) 2003-2004 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 Signal {
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private string name;
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private XmlElement elem;
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private ReturnValue retval;
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private Parameters parms;
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private ClassBase container_type;
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SignalHandler sig_handler;
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public Signal (XmlElement elem, ClassBase container_type)
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{
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this.elem = elem;
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this.name = elem.GetAttribute ("name");
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this.retval = new ReturnValue (elem ["return-type"]);
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if (elem["parameters"] != null)
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parms = new Parameters (elem["parameters"], container_type.NS);
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this.container_type = container_type;
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sig_handler = new SignalHandler (elem, container_type.NS);
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}
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public string Name {
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get {
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return name;
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}
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set {
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name = value;
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}
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}
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public bool Validate ()
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{
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if (Name == "" || !sig_handler.Validate ()) {
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Console.Write ("bad signal " + Name);
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Statistics.ThrottledCount++;
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return false;
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}
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if (parms != null && !parms.Validate ())
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return false;
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if (!retval.Validate ())
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return false;
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return true;
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}
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public void GenerateDecl (StreamWriter sw)
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{
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if (elem.HasAttribute("new_flag") || (container_type != null && container_type.GetSignalRecursively (Name) != null))
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sw.Write("new ");
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sw.WriteLine ("\t\tevent " + EventHandlerQualifiedName + " " + Name + ";");
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}
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private string EventArgsName {
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get {
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if (sig_handler.Name == "voidObjectSignal")
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return "EventArgs";
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else
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return Name + "Args";
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}
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}
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private string EventArgsQualifiedName {
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get {
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if (sig_handler.Name == "voidObjectSignal")
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return "System.EventArgs";
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else
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return container_type.NS + "." + Name + "Args";
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}
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}
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private string EventHandlerName {
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get {
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if (sig_handler.Name == "voidObjectSignal")
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return "EventHandler";
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else if (SymbolTable.Table [container_type.NS + Name + "Handler"] != null)
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return Name + "EventHandler";
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else
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return Name + "Handler";
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}
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}
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private string EventHandlerQualifiedName {
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get {
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if (sig_handler.Name == "voidObjectSignal")
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return "System.EventHandler";
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else
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return container_type.NS + "." + EventHandlerName;
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}
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}
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private bool IsVoid {
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get {
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return retval.CSType == "void";
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}
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}
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private string ReturnGType {
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get {
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ClassBase igen = SymbolTable.Table.GetClassGen (retval.CType);
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if (igen is ObjectGen)
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return "GLib.GType.Object";
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switch (retval.CSType) {
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case "bool":
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return "GLib.GType.Boolean";
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case "string":
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return "GLib.GType.String";
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case "int":
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return "GLib.GType.Int";
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default:
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throw new Exception (retval.CSType);
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}
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}
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}
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private bool NeedNew (ClassBase implementor)
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{
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return elem.HasAttribute ("new_flag") ||
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(container_type != null && container_type.GetSignalRecursively (Name) != null) ||
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(implementor != null && implementor.GetSignalRecursively (Name) != null);
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}
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public void GenEventHandler (GenerationInfo gen_info)
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{
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if (EventHandlerName == "EventHandler")
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return;
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string ns = container_type.NS;
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StreamWriter sw = gen_info.OpenStream (EventHandlerName);
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sw.WriteLine ("namespace " + ns + " {");
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sw.WriteLine ();
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sw.WriteLine ("\tusing System;");
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sw.WriteLine ();
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sw.WriteLine ("\tpublic delegate void " + EventHandlerName + "(object o, " + EventArgsName + " args);");
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sw.WriteLine ();
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sw.WriteLine ("\tpublic class " + EventArgsName + " : GLib.SignalArgs {");
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if (parms != null) {
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for (int i = 1; i < parms.Count; i++) {
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sw.WriteLine ("\t\tpublic " + parms[i].CSType + " " + parms[i].StudlyName + "{");
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if (parms[i].PassAs != "out") {
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sw.WriteLine ("\t\t\tget {");
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sw.WriteLine ("\t\t\t\treturn (" + parms[i].CSType + ") Args[" + (i - 1) + "];");
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sw.WriteLine ("\t\t\t}");
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}
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if (parms[i].PassAs != "") {
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sw.WriteLine ("\t\t\tset {");
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sw.WriteLine ("\t\t\t\tArgs[" + (i - 1) + "] = (" + parms[i].CSType + ")value;");
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sw.WriteLine ("\t\t\t}");
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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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}
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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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private void GenVirtualMethod (StreamWriter sw, ClassBase implementor)
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{
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VMSignature vmsig = new VMSignature (parms);
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sw.WriteLine ("\t\t[GLib.DefaultSignalHandler(Type=typeof(" + (implementor != null ? implementor.QualifiedName : container_type.QualifiedName) + "), ConnectionMethod=\"Override" + Name +"\")]");
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sw.Write ("\t\tprotected ");
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if (NeedNew (implementor))
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sw.Write ("new ");
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sw.WriteLine ("virtual {0} {1} ({2})", retval.CSType, "On" + Name, vmsig.ToString ());
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sw.WriteLine ("\t\t{");
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if (IsVoid)
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sw.WriteLine ("\t\t\tGLib.Value ret = GLib.Value.Empty;");
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else
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sw.WriteLine ("\t\t\tGLib.Value ret = new GLib.Value (" + ReturnGType + ");");
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sw.WriteLine ("\t\t\tGLib.ValueArray inst_and_params = new GLib.ValueArray (" + parms.Count + ");");
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sw.WriteLine ("\t\t\tGLib.Value[] vals = new GLib.Value [" + parms.Count + "];");
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sw.WriteLine ("\t\t\tvals [0] = new GLib.Value (this);");
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sw.WriteLine ("\t\t\tinst_and_params.Append (vals [0]);");
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string cleanup = "";
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for (int i = 1; i < parms.Count; i++) {
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if (parms [i].PassAs == "out") {
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sw.WriteLine ("\t\t\tvals [" + i + "] = GLib.Value.Empty;");
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cleanup += "\t\t\t" + parms [i].Name + " = (" + parms [i].CSType + ") vals [" + i + "];\n";
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} else if (parms [i].IsLength && parms [i - 1].IsString)
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sw.WriteLine ("\t\t\tvals [" + i + "] = new GLib.Value (" + parms [i-1].Name + ".Length);");
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else
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sw.WriteLine ("\t\t\tvals [" + i + "] = new GLib.Value (" + parms [i].Name + ");");
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sw.WriteLine ("\t\t\tinst_and_params.Append (vals [" + i + "]);");
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}
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sw.WriteLine ("\t\t\tg_signal_chain_from_overridden (inst_and_params.ArrayPtr, ref ret);");
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if (cleanup != "")
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sw.WriteLine (cleanup);
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if (!IsVoid)
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sw.WriteLine ("\t\t\treturn (" + retval.CSType + ") ret;");
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sw.WriteLine ("\t\t}\n");
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}
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private void GenDefaultHandlerDelegate (StreamWriter sw, ClassBase implementor)
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{
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ImportSignature isig = new ImportSignature (parms, container_type.NS);
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ManagedCallString call = new ManagedCallString (parms);
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sw.WriteLine ("\t\tdelegate " + retval.ToNativeType + " " + Name + "Delegate (" + isig.ToString () + ");\n");
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sw.WriteLine ("\t\tstatic {0} {1};\n", Name + "Delegate", Name + "Callback");
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sw.WriteLine ("\t\tstatic " + retval.ToNativeType + " " + Name.ToLower() + "_cb (" + isig.ToString () + ")");
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sw.WriteLine ("\t\t{");
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sw.WriteLine ("\t\t\t{0} obj = GLib.Object.GetObject ({1}, false) as {0};", implementor != null ? implementor.Name : container_type.Name, parms[0].Name);
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sw.Write (call.Setup ("\t\t\t"));
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sw.Write ("\t\t\t{0}", IsVoid ? "" : "return ");
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sw.WriteLine ("obj.{0} ({1});", "On" + Name, call.ToString ());
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sw.Write (call.Finish ("\t\t\t"));
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sw.WriteLine ("\t\t}\n");
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string cname = "\"" + elem.GetAttribute("cname") + "\"";
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sw.WriteLine ("\t\tprivate static void Override" + Name + " (GLib.GType gtype)");
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sw.WriteLine ("\t\t{");
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sw.WriteLine ("\t\t\tif (" + Name + "Callback == null)");
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sw.WriteLine ("\t\t\t\t" + Name + "Callback = new " + Name + "Delegate (" + Name.ToLower() + "_cb);");
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sw.WriteLine ("\t\t\tOverrideVirtualMethod (gtype, " + cname + ", " + Name + "Callback);");
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sw.WriteLine ("\t\t}\n");
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}
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public void Generate (GenerationInfo gen_info, ClassBase implementor)
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{
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StreamWriter sw = gen_info.Writer;
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string cname = "\"" + elem.GetAttribute("cname") + "\"";
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string ns;
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if (implementor == null) {
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ns = container_type.NS;
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GenEventHandler (gen_info);
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} else
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ns = implementor.NS;
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sig_handler.Generate (ns, gen_info);
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GenDefaultHandlerDelegate (sw, implementor);
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GenVirtualMethod (sw, implementor);
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string qual_marsh = ns + "Sharp." + sig_handler.Name;
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sw.WriteLine("\t\t[GLib.Signal("+ cname + ")]");
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sw.Write("\t\tpublic ");
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if (NeedNew (implementor))
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sw.Write("new ");
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sw.WriteLine("event " + EventHandlerQualifiedName + " " + Name + " {");
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sw.WriteLine("\t\t\tadd {");
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sw.WriteLine("\t\t\t\tif (value.Method.GetCustomAttributes(typeof(GLib.ConnectBeforeAttribute), false).Length > 0) {");
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sw.WriteLine("\t\t\t\t\tif (BeforeHandlers[" + cname + "] == null)");
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sw.Write("\t\t\t\t\t\tBeforeSignals[" + cname + "] = new " + qual_marsh);
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sw.Write("(this, " + cname + ", value, typeof (" + EventArgsQualifiedName + "), 0);");
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sw.WriteLine("\t\t\t\t\telse");
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sw.WriteLine("\t\t\t\t\t\t((GLib.SignalCallback) BeforeSignals [{0}]).AddDelegate (value);", cname);
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sw.WriteLine("\t\t\t\t\tBeforeHandlers.AddHandler(" + cname + ", value);");
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sw.WriteLine("\t\t\t\t} else {");
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sw.WriteLine("\t\t\t\t\tif (AfterHandlers[" + cname + "] == null)");
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sw.Write("\t\t\t\t\t\tAfterSignals[" + cname + "] = new " + qual_marsh);
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sw.Write("(this, " + cname + ", value, typeof (" + EventArgsQualifiedName + "), 1);");
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sw.WriteLine("\t\t\t\t\telse");
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sw.WriteLine("\t\t\t\t\t\t((GLib.SignalCallback) AfterSignals [{0}]).AddDelegate (value);", cname);
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sw.WriteLine("\t\t\t\t\tAfterHandlers.AddHandler(" + cname + ", value);");
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sw.WriteLine("\t\t\t\t}");
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sw.WriteLine("\t\t\t}");
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sw.WriteLine("\t\t\tremove {");
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sw.WriteLine("\t\t\t\tSystem.ComponentModel.EventHandlerList event_list = AfterHandlers;");
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sw.WriteLine("\t\t\t\tHashtable signals = AfterSignals;");
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sw.WriteLine("\t\t\t\tif (value.Method.GetCustomAttributes(typeof(GLib.ConnectBeforeAttribute), false).Length > 0) {");
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sw.WriteLine("\t\t\t\t\tevent_list = BeforeHandlers;");
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sw.WriteLine("\t\t\t\t\tsignals = BeforeSignals;");
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sw.WriteLine("\t\t\t\t}");
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sw.WriteLine("\t\t\t\tGLib.SignalCallback cb = signals [{0}] as GLib.SignalCallback;", cname);
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sw.WriteLine("\t\t\t\tevent_list.RemoveHandler(" + cname + ", value);");
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sw.WriteLine("\t\t\t\tif (cb == null)");
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sw.WriteLine("\t\t\t\t\treturn;");
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sw.WriteLine();
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sw.WriteLine("\t\t\t\tcb.RemoveDelegate (value);");
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sw.WriteLine();
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sw.WriteLine("\t\t\t\tif (event_list[" + cname + "] == null) {");
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sw.WriteLine("\t\t\t\t\tsignals.Remove(" + cname + ");");
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sw.WriteLine("\t\t\t\t\tcb.Dispose ();");
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sw.WriteLine("\t\t\t\t}");
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sw.WriteLine("\t\t\t}");
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sw.WriteLine("\t\t}");
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sw.WriteLine();
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Statistics.SignalCount++;
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}
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}
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}
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