/****************************************************************************
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** This file is part of the QtGui module of the Qt Toolkit.
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** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
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****************************************************************************/

#include "qpagesetupdialog.h"

#ifndef QT_NO_PRINTDIALOG
#include <qapplication.h>

#include "../kernel/qprintengine_win_p.h"
#include "qpagesetupdialog_p.h"
#include "qprinter.h"
#include <qpa/qplatformnativeinterface.h>

QT_BEGIN_NAMESPACE

QPageSetupDialog::QPageSetupDialog(QPrinter *printer, QWidget *parent)
    : QDialog(*(new QPageSetupDialogPrivate(printer)), parent)
{
    setWindowTitle(QCoreApplication::translate("QPrintPreviewDialog", "Page Setup"));
    setAttribute(Qt::WA_DontShowOnScreen);
}

QPageSetupDialog::QPageSetupDialog(QWidget *parent)
    : QDialog(*(new QPageSetupDialogPrivate(0)), parent)
{
    setWindowTitle(QCoreApplication::translate("QPrintPreviewDialog", "Page Setup"));
    setAttribute(Qt::WA_DontShowOnScreen);
}

int QPageSetupDialog::exec()
{
    Q_D(QPageSetupDialog);

    if (d->printer->outputFormat() != QPrinter::NativeFormat)
        return Rejected;

    QWin32PrintEngine *engine = static_cast<QWin32PrintEngine*>(d->printer->paintEngine());
    QWin32PrintEnginePrivate *ep = static_cast<QWin32PrintEnginePrivate *>(engine->d_ptr.data());

    PAGESETUPDLG psd;
    memset(&psd, 0, sizeof(PAGESETUPDLG));
    psd.lStructSize = sizeof(PAGESETUPDLG);

    // we need a temp DEVMODE struct if we don't have a global DEVMODE
    HGLOBAL hDevMode = 0;
    int devModeSize = 0;
    if (!ep->globalDevMode) {
        devModeSize = sizeof(DEVMODE) + ep->devMode->dmDriverExtra;
        hDevMode = GlobalAlloc(GHND, devModeSize);
        if (hDevMode) {
            void *dest = GlobalLock(hDevMode);
            memcpy(dest, ep->devMode, devModeSize);
            GlobalUnlock(hDevMode);
        }
        psd.hDevMode = hDevMode;
    } else {
        psd.hDevMode = ep->devMode;
    }

    HGLOBAL *tempDevNames = ep->createDevNames();
    psd.hDevNames = tempDevNames;

    QWidget *parent = parentWidget();
    parent = parent ? parent->window() : QApplication::activeWindow();
    Q_ASSERT(!parent ||parent->testAttribute(Qt::WA_WState_Created));

    QWindow *parentWindow = parent->windowHandle();
    psd.hwndOwner = parentWindow ? (HWND)QGuiApplication::platformNativeInterface()->nativeResourceForWindow("handle", parentWindow) : 0;

    psd.Flags = PSD_MARGINS;
    double multiplier = 1;
    switch (QLocale::system().measurementSystem()) {
    case QLocale::MetricSystem:
        psd.Flags |= PSD_INHUNDREDTHSOFMILLIMETERS;
        multiplier = 1;
        break;
    case QLocale::ImperialSystem:
    case QLocale::ImperialUKSystem:
        psd.Flags |= PSD_INTHOUSANDTHSOFINCHES;
        multiplier = 25.4/10;
        break;
    }

    QRect marginRect = ep->getPageMargins();
    psd.rtMargin.left   = marginRect.left()   / multiplier;
    psd.rtMargin.top    = marginRect.top()    / multiplier;
    psd.rtMargin.right  = marginRect.width()  / multiplier;;
    psd.rtMargin.bottom = marginRect.height() / multiplier;;

    QDialog::setVisible(true);
    bool result = PageSetupDlg(&psd);
    QDialog::setVisible(false);
    if (result) {
        ep->readDevnames(psd.hDevNames);
        ep->readDevmode(psd.hDevMode);

        QRect theseMargins = QRect(psd.rtMargin.left   * multiplier,
                                   psd.rtMargin.top    * multiplier,
                                   psd.rtMargin.right  * multiplier,
                                   psd.rtMargin.bottom * multiplier);

        if (theseMargins != marginRect) {
            ep->setPageMargins(psd.rtMargin.left   * multiplier,
                               psd.rtMargin.top    * multiplier,
                               psd.rtMargin.right  * multiplier,
                               psd.rtMargin.bottom * multiplier);
        }

        ep->updateCustomPaperSize();

        // copy from our temp DEVMODE struct
        if (!ep->globalDevMode && hDevMode) {
            void *src = GlobalLock(hDevMode);
            memcpy(ep->devMode, src, devModeSize);
            GlobalUnlock(hDevMode);
        }
    }

    if (!ep->globalDevMode && hDevMode)
        GlobalFree(hDevMode);
    GlobalFree(tempDevNames);
    done(result);
    return result;
}

void QPageSetupDialog::setVisible(bool visible)
{
    if (!visible)
        return;
    exec();
}

QT_END_NAMESPACE
#endif
