mirror of
https://github.com/Ryujinx/GtkSharp.git
synced 2024-09-07 23:43:18 +02:00
158 lines
4.7 KiB
C#
158 lines
4.7 KiB
C#
// GtkSharp.Generation.VirtualMethod.cs - The VirtualMethod Generatable.
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//
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// Author: Mike Kestner <mkestner@novell.com>
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//
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// Copyright (c) 2003-2004 Novell, Inc.
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// Copyright (c) 2009 Christian Hoff
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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 abstract class VirtualMethod : MethodBase {
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protected ReturnValue retval;
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protected ManagedCallString call;
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protected string modifiers = "";
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public VirtualMethod (XmlElement elem, ObjectBase container_type) : base (elem, container_type)
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{
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if (container_type.ParserVersion == 1) {
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// The old pre 2.14 parser didn't drop the 1st parameter in all <signal> and <virtual_method> elements
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parms = new Parameters (elem ["parameters"], true);
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}
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retval = new ReturnValue (elem ["return-type"]);
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}
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protected abstract string CallString {
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get;
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}
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VMSignature signature;
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protected new VMSignature Signature {
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get {
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if (signature == null)
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signature = new VMSignature (parms);
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return signature;
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}
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}
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/* Creates a callback method which invokes the corresponding virtual method
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* @implementor is the class that implements the virtual method(e.g. the class that derives from an interface) or NULL if containing and declaring type are equal
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*/
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public void GenerateCallback (StreamWriter sw, ClassBase implementor)
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{
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LogWriter log = new LogWriter ();
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log.Type = container_type.QualifiedName;
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if (!Validate (log))
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return;
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string native_signature = "";
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if (!IsStatic) {
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native_signature += "IntPtr inst";
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if (parms.Count > 0)
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native_signature += ", ";
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}
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if (parms.Count > 0)
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native_signature += parms.ImportSignature;
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sw.WriteLine ("\t\t[UnmanagedFunctionPointer (CallingConvention.Cdecl)]");
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sw.WriteLine ("\t\tdelegate {0} {1}NativeDelegate ({2});", retval.ToNativeType, this.Name, native_signature);
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sw.WriteLine ();
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sw.WriteLine ("\t\tstatic {0} {1}_cb ({2})", retval.ToNativeType, this.Name, native_signature);
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sw.WriteLine ("\t\t{");
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string unconditional = call.Unconditional ("\t\t\t");
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if (unconditional.Length > 0)
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sw.WriteLine (unconditional);
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sw.WriteLine ("\t\t\ttry {");
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if (!this.IsStatic) {
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string type;
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if (implementor != null)
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type = implementor.QualifiedName;
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else if (this.container_type is InterfaceGen)
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// We are in an interface/adaptor, invoke the method in the implementor class
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type = (this.container_type as InterfaceGen).ImplementorName;
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else
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type = this.container_type.Name;
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sw.WriteLine ("\t\t\t\t{0} __obj = GLib.Object.GetObject (inst, false) as {0};", type);
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}
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string indent = "\t\t\t\t";
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if (!retval.IsVoid)
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sw.WriteLine (indent + retval.CSType + " __result;");
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sw.Write (call.Setup (indent));
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sw.Write (indent);
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if (!retval.IsVoid)
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sw.Write ("__result = ");
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if (!this.IsStatic)
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sw.Write ("__obj.");
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sw.WriteLine (this.CallString + ";");
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sw.Write (call.Finish (indent));
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if (!retval.IsVoid)
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sw.WriteLine ("\t\t\t\treturn " + retval.ToNative ("__result") + ";");
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bool fatal = parms.HasOutParam || !retval.IsVoid;
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sw.WriteLine ("\t\t\t} catch (Exception e) {");
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sw.WriteLine ("\t\t\t\tGLib.ExceptionManager.RaiseUnhandledException (e, " + (fatal ? "true" : "false") + ");");
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if (fatal) {
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sw.WriteLine ("\t\t\t\t// NOTREACHED: above call does not return.");
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sw.WriteLine ("\t\t\t\tthrow e;");
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}
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if (call.HasDisposeParam) {
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sw.WriteLine ("\t\t\t} finally {");
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sw.Write (call.DisposeParams (indent));
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}
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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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}
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enum ValidState {
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Unvalidated,
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Invalid,
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Valid
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}
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ValidState vstate = ValidState.Unvalidated;
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public override bool Validate (LogWriter log)
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{
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if (vstate != ValidState.Unvalidated)
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return vstate == ValidState.Valid;
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vstate = ValidState.Valid;
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log.Member = Name;
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if (!parms.Validate (log) || !retval.Validate (log)) {
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vstate = ValidState.Invalid;
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return false;
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}
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call = new ManagedCallString (parms);
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return true;
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}
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}
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}
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