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

#ifndef QT_NO_PRINTDIALOG

#include "qprintdialog.h"

#include <qwidget.h>
#include <qapplication.h>
#include <qmessagebox.h>
#include <private/qapplication_p.h>

#include <private/qabstractprintdialog_p.h>
#include <private/qprintengine_win_p.h>
#include <private/qprinter_p.h>

QT_BEGIN_NAMESPACE

extern void qt_win_eatMouseMove();

class QPrintDialogPrivate : public QAbstractPrintDialogPrivate
{
    Q_DECLARE_PUBLIC(QPrintDialog)
public:
    QPrintDialogPrivate()
        : ep(0)
    {
    }

    inline void _q_printToFileChanged(int) {}
    inline void _q_rbPrintRangeToggled(bool) {}
    inline void _q_printerChanged(int) {}
    inline void _q_chbPrintLastFirstToggled(bool) {}
    inline void _q_paperSizeChanged(int) {}
    inline void _q_btnBrowseClicked() {}
    inline void _q_btnPropertiesClicked() {}
    int openWindowsPrintDialogModally();

    QWin32PrintEnginePrivate *ep;
};

static void qt_win_setup_PRINTDLGEX(PRINTDLGEX *pd, QWidget *parent,
                                    QPrintDialog *pdlg,
                                    QPrintDialogPrivate *d, HGLOBAL *tempDevNames)
{
    DEVMODE *devMode = d->ep->devMode;

    if (devMode) {
        int size = sizeof(DEVMODE) + devMode->dmDriverExtra;
        pd->hDevMode = GlobalAlloc(GHND, size);
        {
            void *dest = GlobalLock(pd->hDevMode);
            memcpy(dest, devMode, size);
            GlobalUnlock(pd->hDevMode);
        }
    } else {
        pd->hDevMode = NULL;
    }
    pd->hDevNames  = tempDevNames;

    pd->Flags = PD_RETURNDC;
    pd->Flags |= PD_USEDEVMODECOPIESANDCOLLATE;

    if (!pdlg->isOptionEnabled(QPrintDialog::PrintSelection))
        pd->Flags |= PD_NOSELECTION;
    if (pdlg->isOptionEnabled(QPrintDialog::PrintPageRange)) {
        pd->nMinPage = pdlg->minPage();
        pd->nMaxPage = pdlg->maxPage();
    }

    if(!pdlg->isOptionEnabled(QPrintDialog::PrintToFile))
        pd->Flags |= PD_DISABLEPRINTTOFILE;

    if (pdlg->printRange() == QPrintDialog::Selection)
        pd->Flags |= PD_SELECTION;
    else if (pdlg->printRange() == QPrintDialog::PageRange)
        pd->Flags |= PD_PAGENUMS;
    else
        pd->Flags |= PD_ALLPAGES;

    // As stated by MSDN, to enable collate option when minpage==maxpage==0
    // set the PD_NOPAGENUMS flag
    if (pd->nMinPage==0 && pd->nMaxPage==0)
        pd->Flags |= PD_NOPAGENUMS;

    // we don't have a 'current page' notion in the QPrinter API yet.
    // Neither do we support more than one page range, so limit those
    // options
    pd->Flags |= PD_NOCURRENTPAGE;
    pd->nStartPage = START_PAGE_GENERAL;
    pd->nPageRanges = 1;
    pd->nMaxPageRanges = 1;

    if (d->ep->printToFile)
        pd->Flags |= PD_PRINTTOFILE;
    Q_ASSERT(!parent ||parent->testAttribute(Qt::WA_WState_Created));
    pd->hwndOwner = parent ? parent->winId() : 0;
    pd->lpPageRanges[0].nFromPage = qMax(pdlg->fromPage(), pdlg->minPage());
    pd->lpPageRanges[0].nToPage   = (pdlg->toPage() > 0) ? qMin(pdlg->toPage(), pdlg->maxPage()) : 1;
    pd->nCopies = d->ep->num_copies;
}

static void qt_win_read_back_PRINTDLGEX(PRINTDLGEX *pd, QPrintDialog *pdlg, QPrintDialogPrivate *d)
{
    if (pd->Flags & PD_SELECTION) {
        pdlg->setPrintRange(QPrintDialog::Selection);
        pdlg->setFromTo(0, 0);
    } else if (pd->Flags & PD_PAGENUMS) {
        pdlg->setPrintRange(QPrintDialog::PageRange);
        pdlg->setFromTo(pd->lpPageRanges[0].nFromPage, pd->lpPageRanges[0].nToPage);
    } else {
        pdlg->setPrintRange(QPrintDialog::AllPages);
        pdlg->setFromTo(0, 0);
    }

    d->ep->printToFile = (pd->Flags & PD_PRINTTOFILE) != 0;

    d->ep->readDevnames(pd->hDevNames);
    d->ep->readDevmode(pd->hDevMode);
    d->ep->updateCustomPaperSize();

    if (d->ep->printToFile && d->ep->fileName.isEmpty())
        d->ep->fileName = d->ep->port;
    else if (!d->ep->printToFile && d->ep->fileName == QLatin1String("FILE:"))
        d->ep->fileName.clear();
}

static bool warnIfNotNative(QPrinter *printer)
{
    if (printer->outputFormat() != QPrinter::NativeFormat) {
        qWarning("QPrintDialog: Cannot be used on non-native printers");
        return false;
    }
    return true;
}

QPrintDialog::QPrintDialog(QPrinter *printer, QWidget *parent)
    : QAbstractPrintDialog( *(new QPrintDialogPrivate), printer, parent)
{
    Q_D(QPrintDialog);
    if (!warnIfNotNative(d->printer))
        return;
    d->ep = static_cast<QWin32PrintEngine *>(d->printer->paintEngine())->d_func();
}

QPrintDialog::QPrintDialog(QWidget *parent)
    : QAbstractPrintDialog( *(new QPrintDialogPrivate), 0, parent)
{
    Q_D(QPrintDialog);
    if (!warnIfNotNative(d->printer))
        return;
    d->ep = static_cast<QWin32PrintEngine *>(d->printer->paintEngine())->d_func();
}

QPrintDialog::~QPrintDialog()
{
}

int QPrintDialog::exec()
{
    if (!warnIfNotNative(printer()))
        return 0;

    Q_D(QPrintDialog);
    return d->openWindowsPrintDialogModally();
}

int QPrintDialogPrivate::openWindowsPrintDialogModally()
{
    Q_Q(QPrintDialog);
    QWidget *parent = q->parentWidget();
    if (parent)
        parent = parent->window();
    else
        parent = QApplication::activeWindow();

    QWidget modal_widget;
    modal_widget.setAttribute(Qt::WA_NoChildEventsForParent, true);
    modal_widget.setParent(parent, Qt::Window);
    QApplicationPrivate::enterModal(&modal_widget);

    HGLOBAL *tempDevNames = ep->createDevNames();

    bool done;
    bool result;
    bool doPrinting;

    PRINTPAGERANGE pageRange;
    PRINTDLGEX pd;
    memset(&pd, 0, sizeof(PRINTDLGEX));
    pd.lStructSize = sizeof(PRINTDLGEX);
    pd.lpPageRanges = &pageRange;
    qt_win_setup_PRINTDLGEX(&pd, parent, q, this, tempDevNames);

    do {
        done = true;
        doPrinting = false;
        result = (PrintDlgEx(&pd) == S_OK);
        if (result && (pd.dwResultAction == PD_RESULT_PRINT
                       || pd.dwResultAction == PD_RESULT_APPLY))
        {
            doPrinting = (pd.dwResultAction == PD_RESULT_PRINT);
            if ((pd.Flags & PD_PAGENUMS)
                && (pd.lpPageRanges[0].nFromPage > pd.lpPageRanges[0].nToPage))
            {
                pd.lpPageRanges[0].nFromPage = 1;
                pd.lpPageRanges[0].nToPage = 1;
                done = false;
            }
            if (pd.hDC == 0)
                result = false;
        }

        if (!done) {
            QMessageBox::warning(0, QPrintDialog::tr("Print"),
                                 QPrintDialog::tr("The 'From' value cannot be greater than the 'To' value."),
                                 QPrintDialog::tr("OK"));
        }
    } while (!done);

    QApplicationPrivate::leaveModal(&modal_widget);

    qt_win_eatMouseMove();

    // write values back...
    if (result && (pd.dwResultAction == PD_RESULT_PRINT
                   || pd.dwResultAction == PD_RESULT_APPLY))
    {
        qt_win_read_back_PRINTDLGEX(&pd, q, this);
        // update printer validity
        printer->d_func()->validPrinter = !ep->name.isEmpty();
    }

    // Cleanup...
    GlobalFree(tempDevNames);

    q->done(result && doPrinting);

    return result && doPrinting;
}

void QPrintDialog::setVisible(bool visible)
{
    Q_D(QPrintDialog);

    // its always modal, so we cannot hide a native print dialog
    if (!visible)
        return;

    if (!warnIfNotNative(d->printer))
        return;

    (void)d->openWindowsPrintDialogModally();
    return;
}

QT_END_NAMESPACE

#include "moc_qprintdialog.cpp"

#endif // QT_NO_PRINTDIALOG