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** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
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** This file is part of Qt Creator.
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** 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
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****************************************************************************/

#include "qmljssemanticinfoupdater.h"
#include "qmljseditorplugin.h"

#include <qmljs/qmljsmodelmanagerinterface.h>
#include <qmljs/qmljsdocument.h>
#include <qmljs/qmljscheck.h>
#include <qmljs/jsoncheck.h>
#include <qmljs/qmljscontext.h>
#include <qmljs/qmljslink.h>
#include <qmljstools/qmljsmodelmanager.h>

#include <coreplugin/icore.h>

#include <utils/json.h>

namespace QmlJSEditor {
namespace Internal {

SemanticInfoUpdater::SemanticInfoUpdater(QObject *parent)
        : QThread(parent)
        , m_wasCancelled(false)
{
}

SemanticInfoUpdater::~SemanticInfoUpdater()
{
}

void SemanticInfoUpdater::abort()
{
    QMutexLocker locker(&m_mutex);
    m_wasCancelled = true;
    m_condition.wakeOne();
}

void SemanticInfoUpdater::update(const QmlJS::Document::Ptr &doc, const QmlJS::Snapshot &snapshot)
{
    QMutexLocker locker(&m_mutex);
    m_sourceDocument = doc;
    m_sourceSnapshot = snapshot;
    m_condition.wakeOne();
}

void SemanticInfoUpdater::reupdate(const QmlJS::Snapshot &snapshot)
{
    QMutexLocker locker(&m_mutex);
    m_sourceDocument = m_lastSemanticInfo.document;
    m_sourceSnapshot = snapshot;
    m_condition.wakeOne();
}

void SemanticInfoUpdater::run()
{
    setPriority(QThread::LowestPriority);

    forever {
        m_mutex.lock();

        while (! (m_wasCancelled || m_sourceDocument))
            m_condition.wait(&m_mutex);

        const bool done = m_wasCancelled;
        QmlJS::Document::Ptr doc = m_sourceDocument;
        QmlJS::Snapshot snapshot = m_sourceSnapshot;
        m_sourceDocument.clear();
        m_sourceSnapshot = QmlJS::Snapshot();

        m_mutex.unlock();

        if (done)
            break;

        const QmlJSTools::SemanticInfo info = makeNewSemanticInfo(doc, snapshot);

        m_mutex.lock();
        const bool cancelledOrNewData = m_wasCancelled || m_sourceDocument;
        m_mutex.unlock();

        if (! cancelledOrNewData) {
            m_lastSemanticInfo = info;
            emit updated(info);
        }
    }
}

QmlJSTools::SemanticInfo SemanticInfoUpdater::makeNewSemanticInfo(const QmlJS::Document::Ptr &doc, const QmlJS::Snapshot &snapshot)
{
    using namespace QmlJS;

    QmlJSTools::SemanticInfo semanticInfo;
    semanticInfo.document = doc;
    semanticInfo.snapshot = snapshot;

    ModelManagerInterface *modelManager = ModelManagerInterface::instance();

    Link link(semanticInfo.snapshot, modelManager->importPaths(), modelManager->builtins(doc));
    semanticInfo.context = link(doc, &semanticInfo.semanticMessages);

    ScopeChain *scopeChain = new ScopeChain(doc, semanticInfo.context);
    semanticInfo.setRootScopeChain(QSharedPointer<const ScopeChain>(scopeChain));

    if (doc->language() == Document::JsonLanguage) {
        Utils::JsonSchema *schema =
                QmlJSEditorPlugin::instance()->jsonManager()->schemaForFile(doc->fileName());
        if (schema) {
            JsonCheck jsonChecker(doc);
            semanticInfo.staticAnalysisMessages = jsonChecker(schema);
        }
    } else {
        Check checker(doc, semanticInfo.context);
        semanticInfo.staticAnalysisMessages = checker();
    }

    return semanticInfo;
}

} // namespace Internal
} // namespace QmlJSEditor
