GtkSharp/Source/Tools/GapiCodegen/Parameters.cs

306 lines
7 KiB
C#
Raw Normal View History

// GtkSharp.Generation.Parameters.cs - The Parameters Generation Class.
//
// Author: Mike Kestner <mkestner@speakeasy.net>
//
// Copyright (c) 2001-2003 Mike Kestner
// Copyright (c) 2004 Novell, Inc.
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of version 2 of the GNU General Public
// License as published by the Free Software Foundation.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public
// License along with this program; if not, write to the
// Free Software Foundation, Inc., 59 Temple Place - Suite 330,
// Boston, MA 02111-1307, USA.
namespace GtkSharp.Generation {
using System;
using System.Collections;
using System.Collections.Generic;
using System.Xml;
public class Parameters : IEnumerable<Parameter> {
IList<Parameter> param_list = new List<Parameter> ();
XmlElement elem;
bool first_is_instance;
public Parameters (XmlElement elem) : this (elem, false) { }
public Parameters (XmlElement elem, bool first_is_instance)
{
if (elem == null)
valid = true;
this.elem = elem;
this.first_is_instance = first_is_instance;
if (first_is_instance)
is_static = false;
}
public int Count {
get { return param_list.Count; }
}
// gapi assumes GError** parameters to be error parameters in version 1 and 2
private bool throws = false;
public bool Throws {
get {
if (Parser.GetVersion (elem.OwnerDocument.DocumentElement) <= 2)
return true;
if (!throws && elem.HasAttribute ("throws"))
throws = elem.GetAttributeAsBoolean ("throws");
return throws;
}
}
public int VisibleCount {
get {
int visible = 0;
foreach (Parameter p in this) {
if (!IsHidden (p))
visible++;
}
return visible;
}
}
public Parameter this [int idx] {
get {
return param_list [idx];
}
}
public bool IsHidden (Parameter p)
{
int idx = param_list.IndexOf (p);
if (idx > 0 && p.IsLength && p.PassAs == String.Empty && this [idx - 1].IsString)
return true;
if (p.IsCount)
return true;
if (p.IsHidden)
return true;
if (p.CType == "GError**" && Throws)
return true;
if (HasCB || HideData) {
if (Parser.GetVersion (elem.OwnerDocument.DocumentElement) >= 3) {
foreach (Parameter param in param_list) {
if (param.Closure == idx)
return true;
if (param.DestroyNotify == idx)
return true;
}
} else {
if (p.IsUserData && (idx == Count - 1))
return true;
if (p.IsUserData && (idx == Count - 2) && this [Count - 1] is ErrorParameter)
return true;
if (p.IsUserData && idx > 0 && this [idx - 1].Generatable is CallbackGen)
return true;
if (p.IsDestroyNotify && (idx == Count - 1) && this [idx - 1].IsUserData)
return true;
}
}
return false;
}
bool has_cb;
public bool HasCB {
get { return has_cb; }
set { has_cb = value; }
}
public bool HasOutParam {
get {
foreach (Parameter p in this)
if (p.PassAs == "out")
return true;
return false;
}
}
bool hide_data;
public bool HideData {
get { return hide_data; }
set { hide_data = value; }
}
bool is_static;
public bool Static {
get { return is_static; }
set { is_static = value; }
}
bool has_optional;
internal bool HasOptional {
get { return has_optional;}
}
public Parameter GetCountParameter (string param_name)
{
foreach (Parameter p in this)
if (p.Name == param_name) {
p.IsCount = true;
return p;
}
return null;
}
void Clear ()
{
elem = null;
param_list.Clear ();
param_list = null;
}
public IEnumerator<Parameter> GetEnumerator ()
{
return param_list.GetEnumerator ();
}
IEnumerator IEnumerable.GetEnumerator ()
{
return GetEnumerator ();
}
bool valid = false;
public bool Validate (LogWriter log)
{
if (valid)
return true;
if (elem == null)
return false;
for (int i = first_is_instance ? 1 : 0; i < elem.ChildNodes.Count; i++) {
XmlElement parm = elem.ChildNodes [i] as XmlElement;
if (parm == null || parm.Name != "parameter")
continue;
Parameter p = new Parameter (parm);
if (p.IsEllipsis) {
log.Warn ("Ellipsis parameter: hide and bind manually if no alternative exists. ");
Clear ();
return false;
}
if ((p.CSType == "") || (p.Name == "") ||
(p.MarshalType == "") || (SymbolTable.Table.CallByName(p.CType, p.Name) == "")) {
log.Warn ("Unknown type {1} on parameter {0}", p.Name, p.CType);
Clear ();
return false;
}
if (p.IsOptional && p.PassAs == String.Empty && p.IsUserData == false)
has_optional = true;
IGeneratable gen = p.Generatable;
if (p.IsArray) {
p = new ArrayParameter (parm);
if (i < elem.ChildNodes.Count - 1) {
XmlElement next = elem.ChildNodes [i + 1] as XmlElement;
if (next != null || next.Name == "parameter") {
Parameter c = new Parameter (next);
if (c.IsCount) {
p = new ArrayCountPair (parm, next, false);
i++;
}
}
}
} else if (p.IsCount) {
p.IsCount = false;
if (i < elem.ChildNodes.Count - 1) {
XmlElement next = elem.ChildNodes [i + 1] as XmlElement;
if (next != null || next.Name == "parameter") {
Parameter a = new Parameter (next);
if (a.IsArray) {
p = new ArrayCountPair (next, parm, true);
i++;
}
}
}
} else if (p.CType == "GError**" && Throws)
p = new ErrorParameter (parm);
else if (gen is StructBase || gen is ByRefGen) {
p = new StructParameter (parm);
} else if (gen is CallbackGen) {
has_cb = true;
}
param_list.Add (p);
}
if (Parser.GetVersion (elem.OwnerDocument.DocumentElement) < 3 &&
has_cb && Count > 2 && this [Count - 3].Generatable is CallbackGen && this [Count - 2].IsUserData && this [Count - 1].IsDestroyNotify)
this [Count - 3].Scope = "notified";
valid = true;
return true;
}
public bool IsAccessor {
get {
return VisibleCount == 1 && AccessorParam.PassAs == "out";
}
}
public Parameter AccessorParam {
get {
foreach (Parameter p in this) {
if (!IsHidden (p))
return p;
}
return null;
}
}
public string AccessorReturnType {
get {
Parameter p = AccessorParam;
if (p != null)
return p.CSType;
else
return null;
}
}
public string AccessorName {
get {
Parameter p = AccessorParam;
if (p != null)
return p.Name;
else
return null;
}
}
public string ImportSignature {
get {
if (Count == 0)
return String.Empty;
string[] result = new string [Count];
for (int i = 0; i < Count; i++)
result [i] = this [i].NativeSignature;
return String.Join (", ", result);
}
}
}
}