/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (qt-info@nokia.com)
**
**
** GNU Lesser General Public License Usage
**
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this file.
** Please review the following information to ensure the GNU Lesser General
** Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** Other Usage
**
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**************************************************************************/

#include "firstdefinitionfinder.h"

#include <qmljs/parser/qmljsast_p.h>

#include <QtCore/QDebug>

using namespace QmlJS;
using namespace QmlDesigner;
using namespace QmlJS::AST;

FirstDefinitionFinder::FirstDefinitionFinder(const QString &text):
        m_doc(Document::create("<internal>", Document::QmlLanguage))
{
    m_doc->setSource(text);
    bool ok = m_doc->parseQml();

    if (!ok) {
        qDebug() << text;
        foreach (const QmlJS::DiagnosticMessage &message, m_doc->diagnosticMessages())
                qDebug() << message.message;
    }

    Q_ASSERT(ok);
}

/*!
  \brief Finds the first object definition inside the object given by offset


  \arg the offset of the object to search in
  \return the offset of the first object definition
  */
qint32 FirstDefinitionFinder::operator()(quint32 offset)
{
    m_offset = offset;
    m_firstObjectDefinition = 0;

    Node::accept(m_doc->qmlProgram(), this);

    if (!m_firstObjectDefinition)
        return -1;

    return m_firstObjectDefinition->firstSourceLocation().offset;
}

void FirstDefinitionFinder::extractFirstObjectDefinition(UiObjectInitializer* ast)
{
    if (!ast)
        return;

    for (UiObjectMemberList *iter = ast->members; iter; iter = iter->next) {
        if (UiObjectDefinition *def = cast<UiObjectDefinition*>(iter->member)) {
            m_firstObjectDefinition = def;
        }
    }
}

bool FirstDefinitionFinder::visit(QmlJS::AST::UiObjectBinding *ast)
{
    if (ast->qualifiedTypeNameId && ast->qualifiedTypeNameId->identifierToken.isValid()) {
        const quint32 start = ast->qualifiedTypeNameId->identifierToken.offset;

        if (start == m_offset) {
            extractFirstObjectDefinition(ast->initializer);
            return false;
        }
    }
    return true;
}

bool FirstDefinitionFinder::visit(QmlJS::AST::UiObjectDefinition *ast)
{
    const quint32 start = ast->firstSourceLocation().offset;

    if (start == m_offset) {
        extractFirstObjectDefinition(ast->initializer);
        return false;
    }
    return true;
}
