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#include <QtTest/QtTest>

#include <QPainter>

#include <QPalette>

#include <QWindowsStyle>

#ifndef Q_WS_MAC

#include <private/qwindowsurface_p.h>

#include <QDesktopWidget>

#include <QX11Info>

#include "../../shared/util.h"

class tst_QWindowSurface : public QObject

{

    Q_OBJECT

public:

    tst_QWindowSurface() {}

    ~tst_QWindowSurface() {}

private slots:

    void getSetWindowSurface();

    void flushOutsidePaintEvent();

    void grabWidget();

};

class MyWindowSurface : public QWindowSurface

{

public:

    MyWindowSurface(QWidget *w) : QWindowSurface(w) {}

    QPaintDevice *paintDevice() {

        return ℑ

    }

    void flush(QWidget*, const QRegion&, const QPoint&) {

        /* nothing */

    }

private:

    QImage image;

};

class ColorWidget : public QWidget

{

public:

    ColorWidget(QWidget *parent = 0, const QColor &c = QColor(Qt::red))

        : QWidget(parent, Qt::FramelessWindowHint), color(c)

    {

        QPalette opaquePalette = palette();

        opaquePalette.setColor(backgroundRole(), color);

        setPalette(opaquePalette);

        setAutoFillBackground(true);

    }

    void paintEvent(QPaintEvent *e) {

        r += e->region();

    }

    void reset() {

        r = QRegion();

    }

    QColor color;

    QRegion r;

};

//from tst_qwidget.cpp

static void VERIFY_COLOR(const QRegion &region, const QColor &color)

{

    const QRegion r = QRegion(region);

    for (int i = 0; i < r.rects().size(); ++i) {

        const QRect rect = r.rects().at(i);

        for (int t = 0; t < 5; t++) {

            const QPixmap pixmap = QPixmap::grabWindow(QDesktopWidget().winId(),

                                                   rect.left(), rect.top(),

                                                   rect.width(), rect.height());

            QCOMPARE(pixmap.size(), rect.size());

            QPixmap expectedPixmap(pixmap); /* ensure equal formats */

            expectedPixmap.fill(color);

            if (pixmap.toImage().pixel(0,0) != QColor(color).rgb() && t < 4 )

            { QTest::qWait(200); continue; }

            QCOMPARE(pixmap.toImage().pixel(0,0), QColor(color).rgb());

            QCOMPARE(pixmap, expectedPixmap);

            break;

        }

    }

}

void tst_QWindowSurface::getSetWindowSurface()

{

    QWidget w;

    QVERIFY(!w.windowSurface());

    w.show();

    QApplication::processEvents();

    QVERIFY(w.windowSurface());

    for (int i = 0; i < 2; ++i) {

        MyWindowSurface *surface = new MyWindowSurface(&w);

        QCOMPARE(w.windowSurface(), (QWindowSurface *)surface);

        w.setWindowSurface(surface);

        QCOMPARE(w.windowSurface(), (QWindowSurface *)surface);

    }

}

void tst_QWindowSurface::flushOutsidePaintEvent()

{

#ifdef Q_WS_X11

    if (QX11Info::isCompositingManagerRunning())

        QSKIP("Test is unreliable with composition manager", SkipAll);

#endif

#ifdef Q_WS_WIN

    if (QSysInfo::WindowsVersion & QSysInfo::WV_VISTA) {

        QTest::qWait(1000);

    }

#endif

    ColorWidget w(0, Qt::red);

    w.setGeometry(10, 100, 50, 50);

    // prevent custom styles from messing up the background

    w.setStyle(new QWindowsStyle);

    w.show();

    QTest::qWaitForWindowShown(&w);

    QApplication::processEvents();

#if defined(Q_WS_QWS)

    QApplication::sendPostedEvents(); //for the glib event loop

#elif defined(Q_WS_S60)

    QTest::qWait(5000);

#endif

    VERIFY_COLOR(w.geometry(), w.color);

    w.reset();

    // trigger a paintEvent() the next time the event loop is entered

    w.update();

    // draw a black rectangle inside the widget

    QWindowSurface *surface = w.windowSurface();

    QVERIFY(surface);

    const QRect rect = surface->rect(&w);

    surface->beginPaint(rect);

    QImage *img = surface->buffer(&w);

    if (img) {

        QPainter p(img);

        p.fillRect(QRect(QPoint(),img->size()), Qt::black);

    }

    surface->endPaint(rect);

    surface->flush(&w, rect, QPoint());

#ifdef Q_WS_QWS

    VERIFY_COLOR(w.geometry(), Qt::black);

#endif

    // the paintEvent() should overwrite the painted rectangle

    QApplication::processEvents();

#if defined(Q_WS_QWS)

    QSKIP("task 176755", SkipAll);

#endif

    VERIFY_COLOR(w.geometry(), w.color);

    QCOMPARE(QRegion(w.rect()), w.r);

    w.reset();

}

void tst_QWindowSurface::grabWidget()

{

    QWidget parentWidget;

    QWidget childWidget(&parentWidget);

    QWidget babyWidget(&childWidget);

    parentWidget.resize(300, 300);

    childWidget.setGeometry(50, 50, 200, 200);

    childWidget.setAutoFillBackground(true);

    babyWidget.setGeometry(50, 50, 100, 100);

    babyWidget.setAutoFillBackground(true);

    QPalette pal = parentWidget.palette();

    pal.setColor(QPalette::Window, QColor(Qt::blue));

    parentWidget.setPalette(pal);

    pal = childWidget.palette();

    pal.setColor(QPalette::Window, QColor(Qt::white));

    childWidget.setPalette(pal);

    pal = babyWidget.palette();

    pal.setColor(QPalette::Window, QColor(Qt::red));

    babyWidget.setPalette(pal);

    // prevent custom styles from messing up the background

    parentWidget.setStyle(new QWindowsStyle);

    babyWidget.show();

    childWidget.show();

    parentWidget.show();

    QTest::qWaitForWindowShown(&parentWidget);

    QPixmap parentPixmap;

    QTRY_COMPARE((parentPixmap = parentWidget.windowSurface()->grabWidget(&parentWidget)).size(),

                  QSize(300,300));

    QPixmap childPixmap = childWidget.windowSurface()->grabWidget(&childWidget);

    QPixmap babyPixmap = babyWidget.windowSurface()->grabWidget(&babyWidget);

    QPixmap parentSubPixmap = parentWidget.windowSurface()->grabWidget(&parentWidget, QRect(25, 25, 100, 100));

    QPixmap childSubPixmap = childWidget.windowSurface()->grabWidget(&childWidget, QRect(55, 55, 50, 50));

    QPixmap childInvalidSubPixmap = childWidget.windowSurface()->grabWidget(&childWidget, QRect(-50, -50, 150, 150));

    QCOMPARE(parentPixmap.size(), QSize(300, 300));

    QCOMPARE(childPixmap.size(), QSize(200, 200));

    QCOMPARE(babyPixmap.size(), QSize(100, 100));

    QCOMPARE(parentSubPixmap.size(), QSize(100, 100));

    QCOMPARE(childSubPixmap.size(), QSize(50, 50));

    QCOMPARE(childInvalidSubPixmap.size(), QSize(100, 100));

    QImage parentImage = parentPixmap.toImage();

    QImage childImage = childPixmap.toImage();

    QImage babyImage = babyPixmap.toImage();

    QImage parentSubImage = parentSubPixmap.toImage();

    QImage childSubImage = childSubPixmap.toImage();

    QImage childInvalidSubImage = childInvalidSubPixmap.toImage();

    QVERIFY(QColor(parentImage.pixel(0, 0)) == QColor(Qt::blue));

    QVERIFY(QColor(parentImage.pixel(75, 75)) == QColor(Qt::white));

    QVERIFY(QColor(parentImage.pixel(149, 149)) == QColor(Qt::red));

    QVERIFY(QColor(childImage.pixel(0, 0)) == QColor(Qt::white));

    QVERIFY(QColor(childImage.pixel(99, 99)) == QColor(Qt::red));

    QVERIFY(QColor(parentSubImage.pixel(0, 0)) == QColor(Qt::blue));

    QVERIFY(QColor(parentSubImage.pixel(30, 30)) == QColor(Qt::white));

    QVERIFY(QColor(parentSubImage.pixel(80, 80)) == QColor(Qt::red));

    QVERIFY(QColor(childSubImage.pixel(0, 0)) == QColor(Qt::red));

    QVERIFY(QColor(childInvalidSubImage.pixel(0, 0)) == QColor(Qt::white));

}

QTEST_MAIN(tst_QWindowSurface)

#else // Q_WS_MAC

QTEST_NOOP_MAIN

#endif

#include "tst_qwindowsurface.moc"