static_binding.cpp

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/* This file is part of the KDE libraries
    Copyright (C) 2005, 2006 Ian Reinhart Geiser <geiseri@kde.org>
    Copyright (C) 2005, 2006 Matt Broadstone <mbroadst@gmail.com>
    Copyright (C) 2005, 2006 Richard J. Moore <rich@kde.org>
    Copyright (C) 2005, 2006 Erik L. Bunce <kde@bunce.us>

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library 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
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public License
    along with this library; see the file COPYING.LIB.  If not, write to
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA 02110-1301, USA.
*/
#include "static_binding.h"
#include <kjs/interpreter.h>
#include <kjs/function_object.h>
#include <QtCore/QDebug>

namespace KJSEmbed {
    static QHash<QString,const Constructor*> g_ctorHash;
}

using namespace KJSEmbed;

StaticBinding::StaticBinding(KJS::ExecState *exec, const Method *method )
  : KJS::InternalFunctionImp(static_cast<KJS::FunctionPrototype*>(exec->lexicalInterpreter()->builtinFunctionPrototype()),
                             method->name),
    m_method(method)
{
    putDirect( exec->propertyNames().length, m_method->argc, LengthFlags );
}

KJS::JSValue *StaticBinding::callAsFunction( KJS::ExecState *exec, KJS::JSObject *self, const KJS::List &args )
{
  if( m_method->call == 0 )
  {
      //throwError(exec, "Bad method id");      // NOTE: fix
      KJS::throwError(exec, KJS::GeneralError, "Bad method id");
      return KJS::jsNull();
  }

  KJS::JSValue *retValue = (*m_method->call)(exec,self,args);

  if( exec->hadException() )
  {
    return KJS::jsNull();
  }
  return retValue;

}

void StaticBinding::publish( KJS::ExecState *exec, KJS::JSObject *object, const Method *methods )
{
    int idx = 0;
    while( methods[idx].name != 0 )
    {
        object->put(exec, methods[idx].name, new StaticBinding(exec,  &methods[idx]), methods[idx].flags);
        idx++;
    }
}

StaticConstructor::StaticConstructor(KJS::ExecState *exec, const Constructor *constructor )
  : KJS::InternalFunctionImp(static_cast<KJS::FunctionPrototype*>(exec->lexicalInterpreter()->builtinFunctionPrototype()),
                             constructor->name),
    m_constructor( constructor )
{
    putDirect( exec->propertyNames().length, m_constructor->argc, LengthFlags );
    m_default = KJS::jsNull();
}

KJS::JSObject *StaticConstructor::construct( KJS::ExecState *exec, const KJS::List &args )
{
    return (*m_constructor->construct)(exec,args);
}

void StaticConstructor::setDefaultValue( KJS::JSValue *value )
{
    m_default = value;
}

KJS::JSValue *StaticConstructor::defaultValue( KJS::ExecState * exec, KJS::JSType hint ) const
{
    Q_UNUSED(exec);
    Q_UNUSED(hint);
    return m_default;
}

KJS::JSObject *StaticConstructor::add( KJS::ExecState *exec, KJS::JSObject *object, const Constructor *constructor )
{
    KJS::JSObject *obj = new StaticConstructor(exec,  constructor );
    object->put(exec, constructor->name, obj);
    if( constructor->staticMethods )
    {
        StaticBinding::publish( exec, obj, constructor->staticMethods );
    }
    /* crashes for some reason */
    if( constructor->enumerators )
    {
        int idx = 0;
        while( constructor->enumerators[idx].name != 0 )
        {
            obj->put( exec, constructor->enumerators[idx].name,
                KJS::jsNumber(constructor->enumerators[idx].value), KJS::DontDelete|KJS::ReadOnly);
            idx++;
        }
    }
    // publish methods
    KJSEmbed::g_ctorHash[constructor->name] = constructor;
    return obj;
}

const Method *StaticConstructor::methods( const KJS::UString &className )
{
    return KJSEmbed::g_ctorHash[toQString(className)]->methods;
}

const Constructor *StaticConstructor::constructor( const KJS::UString &className )
{
    return KJSEmbed::g_ctorHash[toQString(className)];
}

KJS::JSObject* StaticConstructor::bind(KJS::ExecState* exec, const QString& className, PointerBase& objPtr)
{
    KJSEmbed::callBind mybind = KJSEmbed::g_ctorHash[className]->bind;
//    qDebug() << "StaticConstructor::bind() className=" << className  << " mybind=" << mybind;
    if (mybind)
        return (*mybind)(exec, objPtr);

    return 0;
}

KJS::JSObject *StaticConstructor::construct( KJS::ExecState *exec, KJS::JSObject *parent, const KJS::UString &className, const KJS::List &args )
{
//    qDebug("StaticConstructor::construct('%s')", className.ascii() );
    if( parent->hasProperty( exec, className.ascii() ) )
    {
        KJS::JSObject *ctor = parent->get(exec,className.ascii())->toObject(exec);
        if( ctor )
        {
            return ctor->construct( exec, args );
        }
    }
    qDebug("cannot create '%s'", className.ascii() );
    return KJS::throwError( exec, KJS::TypeError, toUString(QString("Cannot create %1 objects from javascript.").arg(toQString(className)) ));
}

//kate: indent-spaces on; indent-width 4; replace-tabs on; indent-mode cstyle;