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GtkSharp/generator/Signal.cs
Mike Kestner f5289b6c93 2004-03-16 Mike Kestner <mkestner@ximian.com> 
* generator/Signal.cs : streamline the remove code a tad.

svn path=/trunk/gtk-sharp/; revision=24170
2004-03-16 21:21:11 +00:00

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