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#include "qmljsmodelmanagerinterface.h"

using namespace QmlJS;

/*!
    \class QmlJS::ModelManagerInterface
    \brief Interface to the global state of the QmlJS code model.
    \sa QmlJS::Document QmlJS::Snapshot QmlJSTools::Internal::ModelManager

    The ModelManagerInterface is an interface for global state and actions in
    the QmlJS code model. It is implemented by \l{QmlJSTools::Internal::ModelManager}
    and the instance can be accessed through ModelManagerInterface::instance().

    One of its primary concerns is to keep the Snapshots it
    maintains up to date by parsing documents and finding QML modules.

    It has a Snapshot that contains only valid Documents,
    accessible through ModelManagerInterface::snapshot() and a Snapshot with
    potentially more recent, but invalid documents that is exposed through
    ModelManagerInterface::newestSnapshot().
*/

static ModelManagerInterface *g_instance = 0;

ModelManagerInterface::ModelManagerInterface(QObject *parent)
    : QObject(parent)
{
    Q_ASSERT(! g_instance);
    g_instance = this;
}

ModelManagerInterface::~ModelManagerInterface()
{
    Q_ASSERT(g_instance == this);
    g_instance = 0;
}

ModelManagerInterface *ModelManagerInterface::instance()
{
    return g_instance;
}