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#include <QtTest/QtTest>

#include <QDomDocument>

#include <QDomElement>

#include <QDomNode>

#include <qapplication.h>

#include <qdebug.h>

#include <qpainter.h>

#include <qsvggenerator.h>

#include <qsvgrenderer.h>

//TESTED_CLASS=

//TESTED_FILES=

#ifdef Q_OS_SYMBIAN

#define SRCDIR ""

#endif

class tst_QSvgGenerator : public QObject

{

Q_OBJECT

public:

    tst_QSvgGenerator();

    virtual ~tst_QSvgGenerator();

private slots:

    void construction();

    void fileName();

    void outputDevice();

    void sizeAndViewBox();

    void metric();

    void radialGradient();

    void fileEncoding();

    void fractionalFontSize();

    void titleAndDescription();

    void gradientInterpolation();

};

tst_QSvgGenerator::tst_QSvgGenerator()

{

}

tst_QSvgGenerator::~tst_QSvgGenerator()

{

    QFile::remove(QLatin1String("fileName_output.svg"));

    QFile::remove(QLatin1String("outputDevice_output.svg"));

    QFile::remove(QLatin1String("radial_gradient.svg"));

}

void tst_QSvgGenerator::construction()

{

    QSvgGenerator generator;

    QCOMPARE(generator.fileName(), QString());

    QCOMPARE(generator.outputDevice(), (QIODevice *)0);

    QCOMPARE(generator.resolution(), 72);

    QCOMPARE(generator.size(), QSize());

}

static void removeAttribute(const QDomNode &node, const QString &attribute)

{

    if (node.isNull())

        return;

    node.toElement().removeAttribute(attribute);

    removeAttribute(node.firstChild(), attribute);

    removeAttribute(node.nextSibling(), attribute);

}

static void compareWithoutFontInfo(const QByteArray &source, const QByteArray &reference)

{

    QDomDocument sourceDoc;

    sourceDoc.setContent(source);

    QDomDocument referenceDoc;

    referenceDoc.setContent(reference);

    QList<QString> fontAttributes;

    fontAttributes << "font-family" << "font-size" << "font-weight" << "font-style";

    foreach (QString attribute, fontAttributes) {

        removeAttribute(sourceDoc, attribute);

        removeAttribute(referenceDoc, attribute);

    }

    QCOMPARE(sourceDoc.toByteArray(), referenceDoc.toByteArray());

}

static void checkFile(const QString &fileName)

{

    QVERIFY(QFile::exists(fileName));;

    QFile file(fileName);

    QVERIFY(file.open(QIODevice::ReadOnly));

    QFile referenceFile(SRCDIR "referenceSvgs/" + fileName);

    QVERIFY(referenceFile.open(QIODevice::ReadOnly));

    compareWithoutFontInfo(file.readAll(), referenceFile.readAll());

}

void tst_QSvgGenerator::fileName()

{

    QString fileName = "fileName_output.svg";

    QFile::remove(fileName);

    QSvgGenerator generator;

    generator.setFileName(fileName);

    QCOMPARE(generator.fileName(), fileName);

    QPainter painter(&generator);

    painter.fillRect(0, 0, 100, 100, Qt::red);

    painter.end();

    checkFile(fileName);

}

void tst_QSvgGenerator::outputDevice()

{

    QString fileName = "outputDevice_output.svg";

    QFile::remove(fileName);

    QFile file(fileName);

    {

        // Device is not open

        QSvgGenerator generator;

        generator.setOutputDevice(&file);

        QCOMPARE(generator.outputDevice(), (QIODevice *)&file);

        QPainter painter;

        QVERIFY(painter.begin(&generator));

        QCOMPARE(file.openMode(), QIODevice::OpenMode(QIODevice::Text | QIODevice::WriteOnly));

        file.close();

    }

    {

        // Device is not open, WriteOnly

        file.open(QIODevice::WriteOnly);

        QSvgGenerator generator;

        generator.setOutputDevice(&file);

        QCOMPARE(generator.outputDevice(), (QIODevice *)&file);

        QPainter painter;

        QVERIFY(painter.begin(&generator));

        QCOMPARE(file.openMode(), QIODevice::OpenMode(QIODevice::WriteOnly));

        file.close();

    }

    {

        // Device is not open, ReadOnly

        file.open(QIODevice::ReadOnly);

        QSvgGenerator generator;

        generator.setOutputDevice(&file);

        QCOMPARE(generator.outputDevice(), (QIODevice *)&file);

        QPainter painter;

        QTest::ignoreMessage(QtWarningMsg, "QSvgPaintEngine::begin(), could not write to read-only output device: 'Unknown error'");

        QVERIFY(!painter.begin(&generator));

        QCOMPARE(file.openMode(), QIODevice::OpenMode(QIODevice::ReadOnly));

        file.close();

    }

}

void tst_QSvgGenerator::sizeAndViewBox()

{

    { // Setting neither properties should result in

      // none of the attributes written to the SVG

        QSvgGenerator generator;

        QByteArray byteArray;

        QBuffer buffer(&byteArray);

        generator.setOutputDevice(&buffer);

        QPainter painter(&generator);

        painter.end();

        QVERIFY(!byteArray.contains("<svg width=\""));

        QVERIFY(!byteArray.contains("viewBox=\""));

    }

    { // Setting size only should write size only

        QSvgGenerator generator;

        QByteArray byteArray;

        QBuffer buffer(&byteArray);

        generator.setOutputDevice(&buffer);

        generator.setResolution(254);

        generator.setSize(QSize(100, 100));

        QPainter painter(&generator);

        painter.end();

        QVERIFY(byteArray.contains("<svg width=\"10mm\" height=\"10mm\""));

        QVERIFY(!byteArray.contains("viewBox=\""));

    }

    { // Setting viewBox only should write viewBox only

        QSvgGenerator generator;

        QByteArray byteArray;

        QBuffer buffer(&byteArray);

        generator.setOutputDevice(&buffer);

        generator.setViewBox(QRectF(20, 20, 50.666, 50.666));

        QPainter painter(&generator);

        painter.end();

        QVERIFY(!byteArray.contains("<svg width=\""));

        QVERIFY(byteArray.contains("<svg viewBox=\"20 20 50.666 50.666\""));

    }

    { // Setting both properties should result in

      // both of the attributes written to the SVG

        QSvgGenerator generator;

        QByteArray byteArray;

        QBuffer buffer(&byteArray);

        generator.setOutputDevice(&buffer);

        generator.setResolution(254);

        generator.setSize(QSize(500, 500));

        generator.setViewBox(QRectF(20.666, 20.666, 50, 50));

        QPainter painter(&generator);

        painter.end();

        QVERIFY(byteArray.contains("<svg width=\"50mm\" height=\"50mm\""));

        QVERIFY(byteArray.contains("viewBox=\"20.666 20.666 50 50\""));

    }

}

void tst_QSvgGenerator::metric()

{

    QSvgGenerator generator;

    generator.setSize(QSize(100, 100));

    generator.setResolution(254); // 254 dots per inch == 10 dots per mm

    QCOMPARE(generator.widthMM(), 10);

    QCOMPARE(generator.heightMM(), 10);

}

void tst_QSvgGenerator::radialGradient()

{

    QString fileName = "radial_gradient.svg";

    QFile::remove(fileName);

    QSvgGenerator generator;

    generator.setSize(QSize(200, 100));

    generator.setFileName(fileName);

    QCOMPARE(generator.fileName(), fileName);

    QRadialGradient gradient(QPointF(0.5, 0.5), 0.5, QPointF(0.5, 0.5));

    gradient.setInterpolationMode(QGradient::ComponentInterpolation);

    gradient.setColorAt(0, Qt::red);

    gradient.setColorAt(1, Qt::blue);

    gradient.setCoordinateMode(QGradient::ObjectBoundingMode);

    QPainter painter(&generator);

    painter.fillRect(0, 0, 100, 100, gradient);

    gradient = QRadialGradient(QPointF(150, 50), 50, QPointF(150, 50));

    gradient.setInterpolationMode(QGradient::ComponentInterpolation);

    gradient.setColorAt(0, Qt::red);

    gradient.setColorAt(1, Qt::blue);

    painter.fillRect(100, 0, 100, 100, gradient);

    painter.end();

    checkFile(fileName);

}

void tst_QSvgGenerator::fileEncoding()

{

    QTextCodec::setCodecForLocale(QTextCodec::codecForName("ISO-8859-1"));

    QByteArray byteArray;

    QBuffer buffer(&byteArray);

    QSvgGenerator generator;

    generator.setOutputDevice(&buffer);

    static const QChar unicode[] = { 'f', 'o', 'o',

            0x00F8, 'b', 'a', 'r'};

    int size = sizeof(unicode) / sizeof(QChar);

    QString unicodeString = QString::fromRawData(unicode, size);

    QPainter painter(&generator);

    painter.drawText(100, 100, unicodeString);

    painter.end();

    QVERIFY(byteArray.contains(unicodeString.toUtf8()));

}

void tst_QSvgGenerator::fractionalFontSize()

{

    QByteArray byteArray;

    QBuffer buffer(&byteArray);

    QSvgGenerator generator;

    generator.setResolution(72);

    generator.setOutputDevice(&buffer);

    QPainter painter(&generator);

    QFont fractionalFont = painter.font();

    fractionalFont.setPointSizeF(7.5);

    painter.setFont(fractionalFont);

    painter.drawText(100, 100, "foo");

    painter.end();

    QVERIFY(byteArray.contains("7.5"));

}

void tst_QSvgGenerator::titleAndDescription()

{

    QByteArray byteArray;

    QBuffer buffer(&byteArray);

    QSvgGenerator generator;

    generator.setTitle("foo");

    QCOMPARE(generator.title(), QString("foo"));

    generator.setDescription("bar");

    QCOMPARE(generator.description(), QString("bar"));

    generator.setOutputDevice(&buffer);

    QPainter painter(&generator);

    painter.end();

    QVERIFY(byteArray.contains("<title>foo</title>"));

    QVERIFY(byteArray.contains("<desc>bar</desc>"));

}

static void drawTestGradients(QPainter &painter)

{

    int w = painter.device()->width();

    int h = painter.device()->height();

    if (w <= 0 || h <= 0)

        h = w = 72;

    QLinearGradient gradient(QPoint(0, 0), QPoint(1, 1));

    gradient.setCoordinateMode(QGradient::ObjectBoundingMode);

    gradient.setColorAt(0, QColor(255, 0, 0, 0));

    gradient.setColorAt(1, QColor(0, 0, 255, 255));

    painter.fillRect(QRectF(0, 0, w/2, h/2), gradient);

    gradient.setInterpolationMode(QGradient::ComponentInterpolation);

    painter.fillRect(QRectF(0, h/2, w/2, h - h/2), gradient);

    gradient.setInterpolationMode(QGradient::ColorInterpolation);

    gradient.setColorAt(0, QColor(255, 0, 0, 123));

    gradient.setColorAt(1, QColor(0, 0, 255, 123));

    painter.fillRect(QRectF(w/2, 0, w - w/2, h/2), gradient);

    gradient.setInterpolationMode(QGradient::ComponentInterpolation);

    painter.fillRect(QRectF(w/2, h/2, w - w/2, h - h/2), gradient);

}

static qreal sqrImageDiff(const QImage &image1, const QImage &image2)

{

    if (image1.size() != image2.size())

        return 1e30;

    quint64 sum = 0;

    for (int y = 0; y < image1.height(); ++y) {

        const quint8 *line1 = reinterpret_cast<const quint8 *>(image1.scanLine(y));

        const quint8 *line2 = reinterpret_cast<const quint8 *>(image2.scanLine(y));

        for (int x = 0; x < image1.width() * 4; ++x)

            sum += quint64((int(line1[x]) - int(line2[x])) * (int(line1[x]) - int(line2[x])));

    }

    return qreal(sum) / qreal(image1.width() * image1.height());

}

void tst_QSvgGenerator::gradientInterpolation()

{

    QByteArray byteArray;

    QPainter painter;

    QImage image(576, 576, QImage::Format_ARGB32_Premultiplied);

    QImage refImage(576, 576, QImage::Format_ARGB32_Premultiplied);

    image.fill(0x80208050);

    refImage.fill(0x80208050);

    {

        QSvgGenerator generator;

        QBuffer buffer(&byteArray);

        generator.setOutputDevice(&buffer);

        QVERIFY(painter.begin(&generator));

        drawTestGradients(painter);

        painter.end();

    }

    {

        QVERIFY(painter.begin(&image));

        QSvgRenderer renderer(byteArray);

        renderer.render(&painter, image.rect());

        painter.end();

    }

    {

        QVERIFY(painter.begin(&refImage));

        drawTestGradients(painter);

        painter.end();

    }

    QVERIFY(sqrImageDiff(image, refImage) < 2); // pixel error < 1.41 (L2-norm)

}

QTEST_MAIN(tst_QSvgGenerator)

#include "tst_qsvggenerator.moc"