/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
**   * Redistributions of source code must retain the above copyright
**     notice, this list of conditions and the following disclaimer.
**   * Redistributions in binary form must reproduce the above copyright
**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
**   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
**     of its contributors may be used to endorse or promote products derived
**     from this software without specific prior written permission.
**
**
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****************************************************************************/

#include "qmlapplicationviewer.h"

#include <QDir>
#include <QFileInfo>
#include <QApplication>
#include <QDeclarativeComponent>
#include <QDeclarativeEngine>
#include <QDeclarativeContext>

#include <qplatformdefs.h> // MEEGO_EDITION_HARMATTAN

#ifdef HARMATTAN_BOOSTER
#include <MDeclarativeCache>
#endif

#if defined(QMLJSDEBUGGER) && QT_VERSION < 0x040800

#include <qt_private/qdeclarativedebughelper_p.h>

#if !defined(NO_JSDEBUGGER)
#include <jsdebuggeragent.h>
#endif
#if !defined(NO_QMLOBSERVER)
#include <qdeclarativeviewobserver.h>
#endif

// Enable debugging before any QDeclarativeEngine is created
struct QmlJsDebuggingEnabler
{
    QmlJsDebuggingEnabler()
    {
        QDeclarativeDebugHelper::enableDebugging();
    }
};

// Execute code in constructor before first QDeclarativeEngine is instantiated
static QmlJsDebuggingEnabler enableDebuggingHelper;

#endif // QMLJSDEBUGGER

class QmlApplicationViewerPrivate
{
    QString mainQmlFile;
    friend class QmlApplicationViewer;
    static QString adjustPath(const QString &path);
};

QString QmlApplicationViewerPrivate::adjustPath(const QString &path)
{
#ifdef Q_OS_MAC
    if (!QDir::isAbsolutePath(path))
        return QString::fromLatin1("%1/../Resources/%2")
                .arg(QCoreApplication::applicationDirPath(), path);
#elif defined(Q_OS_QNX)
    if (!QDir::isAbsolutePath(path))
        return QString::fromLatin1("app/native/%1").arg(path);
#elif !defined(Q_OS_ANDROID)
    QString pathInInstallDir =
            QString::fromLatin1("%1/../%2").arg(QCoreApplication::applicationDirPath(), path);
    if (QFileInfo(pathInInstallDir).exists())
        return pathInInstallDir;
    pathInInstallDir =
            QString::fromLatin1("%1/%2").arg(QCoreApplication::applicationDirPath(), path);
    if (QFileInfo(pathInInstallDir).exists())
        return pathInInstallDir;
#endif
    return path;
}

QmlApplicationViewer::QmlApplicationViewer(QWidget *parent)
    : QDeclarativeView(parent)
    , d(new QmlApplicationViewerPrivate())
{
    connect(engine(), SIGNAL(quit()), SLOT(close()));
    setResizeMode(QDeclarativeView::SizeRootObjectToView);

    // Qt versions prior to 4.8.0 don't have QML/JS debugging services built in
#if defined(QMLJSDEBUGGER) && QT_VERSION < 0x040800
#if !defined(NO_JSDEBUGGER)
    new QmlJSDebugger::JSDebuggerAgent(engine());
#endif
#if !defined(NO_QMLOBSERVER)
    new QmlJSDebugger::QDeclarativeViewObserver(this, this);
#endif
#endif
}

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

QmlApplicationViewer *QmlApplicationViewer::create()
{
    return new QmlApplicationViewer();
}

void QmlApplicationViewer::setMainQmlFile(const QString &file)
{
    d->mainQmlFile = QmlApplicationViewerPrivate::adjustPath(file);
#ifdef Q_OS_ANDROID
    setSource(QUrl(QLatin1String("assets:/")+d->mainQmlFile));
#else
    setSource(QUrl::fromLocalFile(d->mainQmlFile));
#endif
}

void QmlApplicationViewer::addImportPath(const QString &path)
{
    engine()->addImportPath(QmlApplicationViewerPrivate::adjustPath(path));
}

void QmlApplicationViewer::setOrientation(ScreenOrientation orientation)
{
    // TODO: Needs a Qt5 implementation
    Q_UNUSED(orientation)
}

void QmlApplicationViewer::showExpanded()
{
#if defined(MEEGO_EDITION_HARMATTAN) || defined(Q_WS_SIMULATOR)
    showFullScreen();
#elif defined(Q_WS_MAEMO_5) || defined(Q_OS_QNX)
    showMaximized();
#else
    show();
#endif
}

QApplication *createApplication(int &argc, char **argv)
{
#ifdef HARMATTAN_BOOSTER
    return MDeclarativeCache::qApplication(argc, argv);
#else
    return new QApplication(argc, argv);
#endif
}
