2004-11-17 17:00:00 +01:00
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// GtkSharp.Generation.ReturnValue.cs - The ReturnValue Generatable.
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//
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// Author: Mike Kestner <mkestner@novell.com>
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//
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2005-06-24 00:28:06 +02:00
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// Copyright (c) 2004-2005 Novell, Inc.
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2004-11-17 17:00:00 +01:00
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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.Xml;
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public class ReturnValue {
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2005-06-24 00:28:06 +02:00
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2004-11-17 17:00:00 +01:00
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private XmlElement elem;
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public ReturnValue (XmlElement elem)
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{
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this.elem = elem;
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}
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public string CType {
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get {
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return elem == null ? String.Empty : elem.GetAttribute("type");
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}
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}
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public string CSType {
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get {
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2005-03-07 16:54:49 +01:00
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if (IGen == null)
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return String.Empty;
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2005-06-08 18:53:12 +02:00
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if (ElementType != String.Empty)
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return ElementType + "[]";
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2005-03-07 16:54:49 +01:00
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return IGen.QualifiedName + (IsArray ? "[]" : String.Empty);
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2004-11-17 17:00:00 +01:00
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}
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}
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2005-06-24 00:28:06 +02:00
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string ElementCType {
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get {
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if (elem != null && elem.HasAttribute ("element_type"))
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return elem.GetAttribute ("element_type");
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return String.Empty;
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}
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}
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bool ElementsOwned {
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get {
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if (elem != null && elem.GetAttribute ("elements_owned") == "true")
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return true;
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return false;
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}
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}
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string ElementType {
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get {
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2005-06-24 00:28:06 +02:00
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if (ElementCType.Length > 0)
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return SymbolTable.Table.GetCSType (ElementCType);
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return String.Empty;
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2004-11-17 17:00:00 +01:00
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}
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}
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2005-03-07 16:54:49 +01:00
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IGeneratable igen;
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IGeneratable IGen {
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get {
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if (igen == null)
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igen = SymbolTable.Table [CType];
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return igen;
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}
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}
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bool IsArray {
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2004-11-17 17:00:00 +01:00
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get {
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return elem == null ? false : elem.HasAttribute ("array");
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}
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}
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2005-03-04 17:02:44 +01:00
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public bool IsVoid {
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get {
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return CSType == "void";
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}
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}
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2004-11-17 17:00:00 +01:00
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public string MarshalType {
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get {
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2005-03-07 16:54:49 +01:00
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if (IGen == null)
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return String.Empty;
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return IGen.MarshalReturnType + (IsArray ? "[]" : String.Empty);
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2004-11-17 17:00:00 +01:00
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}
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}
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2005-03-07 16:54:49 +01:00
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bool Owned {
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2005-01-19 03:58:42 +01:00
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get {
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return elem.GetAttribute ("owned") == "true";
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}
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}
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2004-11-17 17:00:00 +01:00
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public string ToNativeType {
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get {
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if (IGen == null)
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return String.Empty;
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return IGen.ToNativeReturnType + (IsArray ? "[]" : String.Empty);
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2004-11-17 17:00:00 +01:00
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}
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}
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2005-03-04 17:02:44 +01:00
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public string FromNative (string var)
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{
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if (IGen == null)
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return String.Empty;
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2005-06-24 00:28:06 +02:00
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if (ElementType != String.Empty) {
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2005-06-08 18:53:12 +02:00
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string type_str = "typeof (" + ElementType + ")";
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2005-06-24 00:28:06 +02:00
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string args = type_str + ", " + (Owned ? "true" : "false") + ", " + (ElementsOwned ? "true" : "false");
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return String.Format ("({0}[]) GLib.Marshaller.ListToArray ({1}, {2})", ElementType, IGen.FromNativeReturn (var + ", " + args), type_str);
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Automatic memory management for opaque types [#49565]
* glib/Opaque.cs (Owned): new property saying whether or not gtk#
owns the memory.
(Opaque): Set Owned to true in the void ctor and false in the
IntPtr one.
(GetOpaque): add a new overload that can also create opaques, a la
GLib.Object.GetObject.
(Ref, Unref, Free): empty virtual methods to be overridden by
subclasses.
(set_Raw): Unref() and possibly Free() the old value, Ref() the
new one.
(~Opaque, Dispose): set Raw to IntPtr.Zero (triggering Free/Unref
if needed)
* parser/gapi2xml.pl (addReturnElem): if the method is named Copy
and returns a pointer, set the "owned" attribute on the
return-type.
* */*-api.raw: Regen
* generator/HandleBase.cs (FromNative): Add new
FromNative/FromNativeReturn overloads that takes a "bool owned"
param. Implement the 1-arg FromNative and FromNativeReturn in
terms of that.
* generator/ObjectBase.cs (FromNative): Implement HandleBase's new
overload. Use the two-arg version of GLib.Object.GetObject when
"owned" is true.
* generator/OpaqueGen.cs (Generate): Pull out Ref, Unref, and
Free/Destroy/Dispose methods and handle them specially by
overriding Opaque.Ref, .Unref, and .Free appropriately. (If any
of the methods are marked deprecated, output a deprecated
do-nothing method as well, to save us from having to write all
those deprecated methods by hand.)
(FromNative): use GetOpaque, passing "owned".
* generator/ReturnValue.cs (FromNative): if the value is a
HandleBase, pass Owned to its FromNative().
* generator/Parameters.cs (Owned): new property (for use on out
params)
(FromNative): Call FromNative() on the generatable, handling Owned
in the case of HandleBase.
* generator/ManagedCallString.cs:
* generator/MethodBody.cs:
* generator/Signal.cs: use param.FromNative() rather than
param.Generatable.FromNative(), to get ownership right.
* */*.metadata: Mark opaque ref/unref/free methods deprecated
(except where we were hiding them before). Add "owned" attributes
to return values and out params as needed.
* pango/AttrIterator.custom (GetFont): work around a
memory-management oddity of the underlying method.
* pango/AttrFontDesc.cs (AttrFontDesc): copy the passed-in
FontDescriptor, since the attribute will assume ownership of it.
* gtk/TreeView.custom (GetPathAtPos): set the "owned" flag on the
returned TreePaths.
* gtk/TargetList.custom: Remove refcounting stuff, which is
now handled automatically
* gtk/NodeStore.cs (GetPath): clear the Owned flag on the created
TreePath so that the underlying structure doesn't get freed when
the function returns
* gtkhtml/HTMLStream.custom (Destroy): hide this and then
reimplement it by hand to keep OpaqueGen from using it in
Dispose(), since calling it after an HTMLStream.Close() will
result in a crash.
svn path=/trunk/gtk-sharp/; revision=47928
2005-08-02 20:45:21 +02:00
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} else if (IGen is HandleBase)
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return ((HandleBase)IGen).FromNative (var, Owned);
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else
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return IGen.FromNativeReturn (var);
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2005-03-04 17:02:44 +01:00
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}
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public bool Validate ()
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{
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if (MarshalType == "" || CSType == "") {
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Console.Write("rettype: " + CType);
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return false;
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}
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2005-06-08 18:53:12 +02:00
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2004-11-17 17:00:00 +01:00
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return true;
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}
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}
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}
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