engine/components/other/qtscript/qtscriptcomponent.cpp

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/******************************************************************************
 * This file is part of the Gluon Development Platform
 * Copyright (c) 2010 Arjen Hiemstra <ahiemstra@heimr.nl>
 * Copyright (C) 2010 Dan Leinir Turthra Jensen <admin@leinir.dk>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include "qtscriptcomponent.h"

#include <core/gluonobject.h>
#include <graphics/materialinstance.h>
#include <gameobject.h>
#include <core/debughelper.h>
#include <game.h>
#include <engine/asset.h>

#include <QtScript/QScriptEngine>
#include <QtCore/QDebug>
#include <QMimeData>


REGISTER_OBJECTTYPE( GluonEngine, QtScriptComponent )

using namespace GluonEngine;

void qtscript_initialize_com_trolltech_qt_gui_bindings( QScriptValue& );
class QtScriptComponent::QtScriptComponentPrivate
{
    public:
        QtScriptComponentPrivate()
        {
            QScriptValue extensionObject = engine.globalObject();
            qtscript_initialize_com_trolltech_qt_gui_bindings( extensionObject );
            script = 0;
        }

        QScriptEngine engine;

        QScriptValue drawFunc;
        QScriptValue updateFunc;

        GluonEngine::Asset* script;
};

QtScriptComponent::QtScriptComponent( QObject* parent )
    : Component( parent )
    , d( new QtScriptComponentPrivate )
{
    qScriptRegisterMetaType( &d->engine, gluonObjectToScriptValue, gluonObjectFromScriptValue );
    qScriptRegisterMetaType( &d->engine, gameObjectToScriptValue, gameObjectFromScriptValue );
    qScriptRegisterMetaType( &d->engine, materialInstanceToScriptValue, materialInstanceFromScriptValue );
}

QtScriptComponent::QtScriptComponent( const QtScriptComponent& other )
    : Component( other )
    , d( other.d )
{
}

QtScriptComponent::~QtScriptComponent()
{
    delete d;
}

QString QtScriptComponent::category() const
{
    return QString( "Game Logic" );
}

void QtScriptComponent::initialize()
{
    if( !d->script )
        return;

    d->script->load();

    if( d->script->data()->hasText() )
    {
        d->engine.evaluate( d->script->data()->text(), gameObject()->name() );
        if( d->engine.uncaughtException().isValid() )
        {
            debug( QString( "%1: %2" ).arg( d->engine.uncaughtException().toString() ).arg( d->engine.uncaughtExceptionBacktrace().join( " " ) ) );
            return;
        }

        QScriptValue component = d->engine.newQObject( this, QScriptEngine::QtOwnership, QScriptEngine::AutoCreateDynamicProperties );
        d->engine.globalObject().setProperty( "Component", component );

        QScriptValue gameObj = d->engine.newQObject( gameObject(), QScriptEngine::QtOwnership, QScriptEngine::AutoCreateDynamicProperties );
        d->engine.globalObject().setProperty( "GameObject", gameObj );

        QScriptValue game = d->engine.newQObject( Game::instance(), QScriptEngine::QtOwnership, QScriptEngine::AutoCreateDynamicProperties );
        d->engine.globalObject().setProperty( "Game", game );

        d->updateFunc = d->engine.globalObject().property( "update" );
        d->drawFunc = d->engine.globalObject().property( "draw" );

        QScriptValue initFunc = d->engine.globalObject().property( "initialize" );
        if( initFunc.isFunction() )
        {
            initFunc.call( QScriptValue() );
            if( d->engine.uncaughtException().isValid() )
                debug( QString( "%1: %2" ).arg( d->engine.uncaughtException().toString() ).arg( d->engine.uncaughtExceptionBacktrace().join( " " ) ) );
        }
    }
}

void QtScriptComponent::start()
{
    if( d->script )
    {
        QScriptValue startFunc = d->engine.globalObject().property( "start" );
        if( startFunc.isFunction() )
        {
            startFunc.call( QScriptValue() );
            if( d->engine.uncaughtException().isValid() )
                debug( QString( "%1: %2" ).arg( d->engine.uncaughtException().toString() ).arg( d->engine.uncaughtExceptionBacktrace().join( " " ) ) );
        }
    }
}

void QtScriptComponent::draw( int timeLapse )
{
    if( d->drawFunc.isFunction() )
    {
        d->drawFunc.call( QScriptValue(), QScriptValueList() << timeLapse );
        if( d->engine.uncaughtException().isValid() )
        {
            debug( QString( "%1: %2" ).arg( d->engine.uncaughtException().toString() ).arg( d->engine.uncaughtExceptionBacktrace().join( " " ) ) );
            d->drawFunc = QScriptValue();
        }
    }
}

void QtScriptComponent::update( int elapsedMilliseconds )
{
    if( d->updateFunc.isFunction() )
    {
        d->updateFunc.call( QScriptValue(), QScriptValueList() << elapsedMilliseconds );
        if( d->engine.uncaughtException().isValid() )
        {
            debug( QString( "%1: %2" ).arg( d->engine.uncaughtException().toString() ).arg( d->engine.uncaughtExceptionBacktrace().join( " " ) ) );
            d->updateFunc = QScriptValue();
        }
    }
}

void QtScriptComponent::stop()
{
    if( d->script )
    {
        QScriptValue stopFunc = d->engine.globalObject().property( "stop" );
        if( stopFunc.isFunction() )
        {
            stopFunc.call( QScriptValue() );
            if( d->engine.uncaughtException().isValid() )
                debug( QString( "%1: %2" ).arg( d->engine.uncaughtException().toString() ).arg( d->engine.uncaughtExceptionBacktrace().join( " " ) ) );
        }
    }
}

void QtScriptComponent::cleanup()
{
    if( d->script )
    {
        QScriptValue cleanupFunc = d->engine.globalObject().property( "cleanup" );
        if( cleanupFunc.isFunction() )
        {
            cleanupFunc.call( QScriptValue() );
            if( d->engine.uncaughtException().isValid() )
                debug( QString( "%1: %2" ).arg( d->engine.uncaughtException().toString() ).arg( d->engine.uncaughtExceptionBacktrace().join( " " ) ) );
        }
    }
}

Asset* QtScriptComponent::script()
{
    return d->script;
}

void QtScriptComponent::setScript( Asset* asset )
{
    d->script = asset;
}

QScriptValue gluonObjectToScriptValue( QScriptEngine* engine, const pGluonObject& in )
{
    return engine->newQObject( in );
}

void gluonObjectFromScriptValue( const QScriptValue& object, pGluonObject& out )
{
    out = qobject_cast<GluonCore::GluonObject*>( object.toQObject() );
}

QScriptValue gameObjectToScriptValue( QScriptEngine* engine, const pGameObject& in )
{
    return engine->newQObject( in );
}

void gameObjectFromScriptValue( const QScriptValue& object, pGameObject& out )
{
    out = qobject_cast<GameObject*>( object.toQObject() );
}

QScriptValue materialInstanceToScriptValue( QScriptEngine* engine, const pMaterialInstance& in )
{
    return engine->newQObject( in );
}

void materialInstanceFromScriptValue( const QScriptValue& object, pMaterialInstance& out )
{
    out = qobject_cast<pMaterialInstance>( object.toQObject() );
}

Q_EXPORT_PLUGIN2( gluon_component_qtscript, GluonEngine::QtScriptComponent );

#include "qtscriptcomponent.moc"

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