/****************************************************************************

**

** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the Qt Designer of the Qt Toolkit.

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** No Commercial Usage

** This file contains pre-release code and may not be distributed.

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** contained in the Technology Preview License Agreement accompanying

** this package.

**

** GNU Lesser General Public License Usage

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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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**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

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** $QT_END_LICENSE$

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****************************************************************************/

#include "deviceprofile_p.h"

#include <QtDesigner/QDesignerFormEditorInterface>

#include <widgetfactory_p.h>

#include <qdesigner_utils_p.h>

#include <QtGui/QApplication>

#include <QtGui/QFont>

#include <QtGui/QDesktopWidget>

#include <QtGui/QStyle>

#include <QtGui/QStyleFactory>

#include <QtGui/QApplication>

#include <QtCore/QSharedData>

#include <QtCore/QTextStream>

#include <QtCore/QXmlStreamWriter>

#include <QtCore/QXmlStreamReader>

static const char *dpiXPropertyC = "_q_customDpiX";

static const char *dpiYPropertyC = "_q_customDpiY";

// XML serialization

static const char *xmlVersionC="1.0";

static const char *rootElementC="deviceprofile";

static const char *nameElementC = "name";

static const char *fontFamilyElementC = "fontfamily";

static const char *fontPointSizeElementC = "fontpointsize";

static const char *dPIXElementC = "dpix";

static const char *dPIYElementC = "dpiy";

static const char *styleElementC = "style";

/* DeviceProfile:

 * For preview purposes (preview, widget box, new form dialog), the

 * QDesignerFormBuilder applies the settings to the form main container

 * (Point being here that the DPI must be set directly for size calculations

 * to be correct).

 * For editing purposes, FormWindow applies the settings to the form container

 * as not to interfere with the font settings of the form main container.

 * In addition, the widgetfactory maintains the system settings style

 * and applies it when creating widgets. */

QT_BEGIN_NAMESPACE

namespace qdesigner_internal {

// ---------------- DeviceProfileData

class DeviceProfileData : public QSharedData {

public:

    DeviceProfileData();

    void fromSystem();

    void clear();

    QString m_fontFamily;

    int m_fontPointSize;

    QString m_style;

    int m_dpiX;

    int m_dpiY;

    QString m_name;

};

DeviceProfileData::DeviceProfileData()  :

   m_fontPointSize(-1),

   m_dpiX(-1),

   m_dpiY(-1)

{

}

void DeviceProfileData::clear()

{

    m_fontPointSize = -1;

    m_dpiX = 0;

    m_dpiY = 0;

    m_name.clear();

    m_style.clear();

}

void DeviceProfileData::fromSystem()

{

    const QFont appFont = QApplication::font();

    m_fontFamily = appFont.family();

    m_fontPointSize = appFont.pointSize();

    DeviceProfile::systemResolution(&m_dpiX, &m_dpiY);

    m_style.clear();

}

// ---------------- DeviceProfile

DeviceProfile::DeviceProfile() :

   m_d(new DeviceProfileData)

{

}

DeviceProfile::DeviceProfile(const DeviceProfile &o) :

    m_d(o.m_d)

{

}

DeviceProfile& DeviceProfile::operator=(const DeviceProfile &o)

{

    m_d.operator=(o.m_d);

    return *this;

}

DeviceProfile::~DeviceProfile()

{

}

void DeviceProfile::clear()

{

    m_d->clear();

}

bool DeviceProfile::isEmpty() const

{

    return m_d->m_name.isEmpty();

}

QString DeviceProfile::fontFamily() const

{

     return m_d->m_fontFamily;

}

void DeviceProfile::setFontFamily(const QString &f)

{

     m_d->m_fontFamily = f;

}

int DeviceProfile::fontPointSize() const

{

     return m_d->m_fontPointSize;

}

void DeviceProfile::setFontPointSize(int p)

{

     m_d->m_fontPointSize = p;

}

QString DeviceProfile::style() const

{

    return m_d->m_style;

}

void DeviceProfile::setStyle(const QString &s)

{

    m_d->m_style = s;

}

int DeviceProfile::dpiX() const

{

     return m_d->m_dpiX;

}

void DeviceProfile::setDpiX(int d)

{

     m_d->m_dpiX = d;

}

int DeviceProfile::dpiY() const

{

     return m_d->m_dpiY;

}

void DeviceProfile::setDpiY(int d)

{

     m_d->m_dpiY = d;

}

void DeviceProfile::fromSystem()

{

    m_d->fromSystem();

}

QString DeviceProfile::name() const

{

    return m_d->m_name;

}

void DeviceProfile::setName(const QString &n)

{

    m_d->m_name = n;

}

void DeviceProfile::systemResolution(int *dpiX, int *dpiY)

{

    const QDesktopWidget *dw = qApp->desktop();

    *dpiX = dw->logicalDpiX();

    *dpiY = dw->logicalDpiY();

}

class FriendlyWidget : public QWidget {

    friend class DeviceProfile;

};

void DeviceProfile::widgetResolution(const QWidget *w, int *dpiX, int *dpiY)

{

    const FriendlyWidget *fw = static_cast<const FriendlyWidget*>(w);

    *dpiX = fw->metric(QPaintDevice::PdmDpiX);

    *dpiY = fw->metric(QPaintDevice::PdmDpiY);

}

QString DeviceProfile::toString() const

{

    const DeviceProfileData &d = *m_d;

    QString rc;

    QTextStream(&rc) << "DeviceProfile:name=" << d.m_name << " Font=" << d.m_fontFamily << ' '

        << d.m_fontPointSize << " Style=" << d.m_style << " DPI=" << d.m_dpiX << ',' << d.m_dpiY;

    return rc;

}

// Apply font to widget

static void applyFont(const QString &family, int size, DeviceProfile::ApplyMode am, QWidget *widget)

{

    QFont currentFont = widget->font();

    if (currentFont.pointSize() == size && currentFont.family() == family)

        return;

    switch (am) {

    case DeviceProfile::ApplyFormParent:

        // Invisible form parent: Apply all

        widget->setFont(QFont(family, size));

        break;

    case DeviceProfile::ApplyPreview: {

        // Preview: Apply only subproperties that have not been changed by designer properties

        bool apply = false;

        const uint resolve = currentFont.resolve();

        if (!(resolve & QFont::FamilyResolved)) {

            currentFont.setFamily(family);

            apply = true;

        }

        if (!(resolve & QFont::SizeResolved)) {

            currentFont.setPointSize(size);

            apply = true;

        }

        if (apply)

            widget->setFont(currentFont);

    }

        break;

    }

}

void DeviceProfile::applyDPI(int dpiX, int dpiY, QWidget *widget)

{

    int sysDPIX, sysDPIY; // Set dynamic variables in case values are different from system DPI

    systemResolution(&sysDPIX, &sysDPIY);

    if (dpiX != sysDPIX && dpiY != sysDPIY) {

        widget->setProperty(dpiXPropertyC, QVariant(dpiX));

        widget->setProperty(dpiYPropertyC, QVariant(dpiY));

    }

}

void DeviceProfile::apply(const QDesignerFormEditorInterface *core, QWidget *widget, ApplyMode am) const

{

    if (isEmpty())

        return;

    const DeviceProfileData &d = *m_d;

    if (!d.m_fontFamily.isEmpty())

        applyFont(d.m_fontFamily, d.m_fontPointSize, am, widget);

    applyDPI(d.m_dpiX, d.m_dpiY, widget);

    if (!d.m_style.isEmpty()) {

        if (WidgetFactory *wf = qobject_cast<qdesigner_internal::WidgetFactory *>(core->widgetFactory()))

            wf->applyStyleTopLevel(d.m_style, widget);

    }

}

bool DeviceProfile::equals(const DeviceProfile& rhs) const

{

    const DeviceProfileData &d = *m_d;

    const DeviceProfileData &rhs_d = *rhs.m_d;

    return d.m_fontPointSize == rhs_d.m_fontPointSize &&

           d.m_dpiX == rhs_d.m_dpiX && d.m_dpiY == rhs_d.m_dpiY && d.m_fontFamily == rhs_d.m_fontFamily &&

           d.m_style == rhs_d.m_style && d.m_name == rhs_d.m_name;

}

static inline void writeElement(QXmlStreamWriter &writer, const QString &element, const QString &cdata)

{

    writer.writeStartElement(element);

    writer.writeCharacters(cdata);

    writer.writeEndElement();

}

QString DeviceProfile::toXml() const

{

    const DeviceProfileData &d = *m_d;

    QString rc;

    QXmlStreamWriter writer(&rc);

    writer.writeStartDocument(QLatin1String(xmlVersionC));

    writer.writeStartElement(QLatin1String(rootElementC));

    writeElement(writer, QLatin1String(nameElementC), d.m_name);

    if (!d.m_fontFamily.isEmpty())

        writeElement(writer, QLatin1String(fontFamilyElementC), d.m_fontFamily);

    if (d.m_fontPointSize >= 0)

        writeElement(writer, QLatin1String(fontPointSizeElementC), QString::number(d.m_fontPointSize));

    if (d.m_dpiX > 0)

        writeElement(writer, QLatin1String(dPIXElementC), QString::number(d.m_dpiX));

    if (d.m_dpiY > 0)

        writeElement(writer, QLatin1String(dPIYElementC), QString::number(d.m_dpiY));

    if (!d.m_style.isEmpty())

        writeElement(writer, QLatin1String(styleElementC), d.m_style);

    writer.writeEndElement();

    writer.writeEndDocument();

    return rc;

}

/* Switch stages when encountering a start element (state table) */

enum ParseStage { ParseBeginning, ParseWithinRoot,

                  ParseName, ParseFontFamily, ParseFontPointSize, ParseDPIX,  ParseDPIY,  ParseStyle,

                  ParseError };

static ParseStage nextStage(ParseStage currentStage, const QStringRef &startElement)

{

    switch (currentStage) {

    case ParseBeginning:

        if (startElement == QLatin1String(rootElementC))

            return ParseWithinRoot;

        break;

    case ParseWithinRoot:

    case ParseName:

    case ParseFontFamily:

    case ParseFontPointSize:

    case ParseDPIX:

    case ParseDPIY:

    case ParseStyle:

        if (startElement == QLatin1String(nameElementC))

            return ParseName;

        if (startElement == QLatin1String(fontFamilyElementC))

            return ParseFontFamily;

        if (startElement == QLatin1String(fontPointSizeElementC))

            return ParseFontPointSize;

        if (startElement == QLatin1String(dPIXElementC))

            return ParseDPIX;

        if (startElement == QLatin1String(dPIYElementC))

            return ParseDPIY;

        if (startElement == QLatin1String(styleElementC))

            return ParseStyle;

        break;

    case ParseError:

        break;

    }

    return ParseError;

}

static bool readIntegerElement(QXmlStreamReader &reader, int *v)

{

    const QString e = reader.readElementText();

    bool ok;

    *v = e.toInt(&ok);

    //: Reading a number for an embedded device profile

    if (!ok)

        reader.raiseError(QApplication::translate("DeviceProfile", "'%1' is not a number.").arg(e));

    return ok;

}

bool DeviceProfile::fromXml(const QString &xml, QString *errorMessage)

{

    DeviceProfileData &d = *m_d;

    d.fromSystem();

    QXmlStreamReader reader(xml);

    ParseStage ps = ParseBeginning;

    QXmlStreamReader::TokenType tt = QXmlStreamReader::NoToken;

    int iv = 0;

    do {

        tt = reader.readNext();

        if (tt == QXmlStreamReader::StartElement) {

            ps = nextStage(ps, reader.name());

            switch (ps) {

            case ParseBeginning:

            case ParseWithinRoot:

                break;

            case ParseError:

                reader.raiseError(QApplication::translate("DeviceProfile", "An invalid tag <%1> was encountered.").arg(reader.name().toString()));

                tt = QXmlStreamReader::Invalid;

                break;

            case ParseName:

                d.m_name = reader.readElementText();

                break;

            case ParseFontFamily:

                d.m_fontFamily = reader.readElementText();

                break;

            case ParseFontPointSize:

                if (readIntegerElement(reader, &iv)) {

                    d.m_fontPointSize = iv;

                } else {

                    tt = QXmlStreamReader::Invalid;

                }

                break;

            case ParseDPIX:

                if (readIntegerElement(reader, &iv)) {

                    d.m_dpiX = iv;

                } else {

                    tt = QXmlStreamReader::Invalid;

                }

                break;

            case ParseDPIY:

                if (readIntegerElement(reader, &iv)) {

                    d.m_dpiY = iv;

                } else {

                    tt = QXmlStreamReader::Invalid;

                }

                break;

            case ParseStyle:

                d.m_style = reader.readElementText();

                break;

            }

        }

    } while (tt != QXmlStreamReader::Invalid && tt != QXmlStreamReader::EndDocument);

    if (reader.hasError()) {

        *errorMessage = reader.errorString();

        return false;

    }

    return true;

}

}

QT_END_NAMESPACE