C++ DisplayModel::CurrentPageNo方法代码示例

void LinkHandler::ScrollTo(PageDestination *dest)
{
    assert(owner && owner->linkHandler == this);
    int pageNo = dest->GetDestPageNo();
    if (pageNo <= 0)
        return;

    if (owner->dm->AsChmEngine()) {
        owner->dm->AsChmEngine()->GoToDestination(dest);
        return;
    }

    DisplayModel *dm = owner->dm;
    PointI scroll(-1, 0);
    RectD rect = dest->GetDestRect();

    if (rect.IsEmpty()) {
        // PDF: /XYZ top left
        // scroll to rect.TL()
        PointD scrollD = dm->engine->Transform(rect.TL(), pageNo, dm->ZoomReal(), dm->Rotation());
        scroll = scrollD.Convert<int>();

        // default values for the coordinates mean: keep the current position
        if (DEST_USE_DEFAULT == rect.x)
            scroll.x = -1;
        if (DEST_USE_DEFAULT == rect.y) {
            PageInfo *pageInfo = dm->GetPageInfo(dm->CurrentPageNo());
            scroll.y = -(pageInfo->pageOnScreen.y - dm->GetWindowMargin()->top);
            scroll.y = max(scroll.y, 0); // Adobe Reader never shows the previous page
        }
    }
    else if (rect.dx != DEST_USE_DEFAULT && rect.dy != DEST_USE_DEFAULT) {
        // PDF: /FitR left bottom right top
        RectD rectD = dm->engine->Transform(rect, pageNo, dm->ZoomReal(), dm->Rotation());
        scroll = rectD.TL().Convert<int>();

        // Rect<float> rectF = dm->engine->Transform(rect, pageNo, 1.0, dm->rotation()).Convert<float>();
        // zoom = 100.0f * min(owner->canvasRc.dx / rectF.dx, owner->canvasRc.dy / rectF.dy);
    }
    else if (rect.y != DEST_USE_DEFAULT) {
        // PDF: /FitH top  or  /FitBH top
        PointD scrollD = dm->engine->Transform(rect.TL(), pageNo, dm->ZoomReal(), dm->Rotation());
        scroll.y = max(scrollD.Convert<int>().y, 0); // Adobe Reader never shows the previous page

        // zoom = FitBH ? ZOOM_FIT_CONTENT : ZOOM_FIT_WIDTH
    }
    // else if (Fit || FitV) zoom = ZOOM_FIT_PAGE
    // else if (FitB || FitBV) zoom = ZOOM_FIT_CONTENT
    /* // ignore author-set zoom settings (at least as long as there's no way to overrule them)
    if (zoom != INVALID_ZOOM) {
        // TODO: adjust the zoom level before calculating the scrolling coordinates
        dm->zoomTo(zoom);
        UpdateToolbarState(owner);
    }
    // */
    dm->GoToPage(pageNo, scroll.y, true, scroll.x);
}

void OnMenuPrint(WindowInfo *win, bool waitForCompletion)
{
    // we remember some printer settings per process
    static ScopedMem<DEVMODE> defaultDevMode;
    static PrintScaleAdv defaultScaleAdv = PrintScaleShrink;
    static bool defaultAsImage = false;

    bool printSelection = false;
    Vec<PRINTPAGERANGE> ranges;
    PRINTER_INFO_2 printerInfo = { 0 };

    if (!HasPermission(Perm_PrinterAccess)) return;

    DisplayModel *dm = win->dm;
    assert(dm);
    if (!dm) return;

    if (!dm->engine || !dm->engine->AllowsPrinting())
        return;

    if (win->IsChm()) {
        win->dm->AsChmEngine()->PrintCurrentPage();
        return;
    }

    if (win->printThread) {
        int res = MessageBox(win->hwndFrame, _TR("Printing is still in progress. Abort and start over?"), _TR("Printing in progress."), MB_ICONEXCLAMATION | MB_YESNO | (IsUIRightToLeft() ? MB_RTLREADING : 0));
        if (res == IDNO)
            return;
    }
    AbortPrinting(win);

    PRINTDLGEX pd;
    ZeroMemory(&pd, sizeof(PRINTDLGEX));
    pd.lStructSize = sizeof(PRINTDLGEX);
    pd.hwndOwner   = win->hwndFrame;
    pd.Flags       = PD_USEDEVMODECOPIESANDCOLLATE | PD_COLLATE;
    if (!win->selectionOnPage)
        pd.Flags |= PD_NOSELECTION;
    pd.nCopies     = 1;
    /* by default print all pages */
    pd.nPageRanges = 1;
    pd.nMaxPageRanges = MAXPAGERANGES;
    PRINTPAGERANGE *ppr = AllocArray<PRINTPAGERANGE>(MAXPAGERANGES);
    pd.lpPageRanges = ppr;
    ppr->nFromPage = 1;
    ppr->nToPage = dm->PageCount();
    pd.nMinPage = 1;
    pd.nMaxPage = dm->PageCount();
    pd.nStartPage = START_PAGE_GENERAL;

    Print_Advanced_Data advanced(PrintRangeAll, defaultScaleAdv, defaultAsImage);
    ScopedMem<DLGTEMPLATE> dlgTemplate; // needed for RTL languages
    HPROPSHEETPAGE hPsp = CreatePrintAdvancedPropSheet(&advanced, dlgTemplate);
    pd.lphPropertyPages = &hPsp;
    pd.nPropertyPages = 1;

    // restore remembered settings
    if (defaultDevMode)
        pd.hDevMode = GlobalMemDup(defaultDevMode.Get(), defaultDevMode.Get()->dmSize + defaultDevMode.Get()->dmDriverExtra);

    if (PrintDlgEx(&pd) != S_OK) {
        if (CommDlgExtendedError() != 0) {
            /* if PrintDlg was cancelled then
               CommDlgExtendedError is zero, otherwise it returns the
               error code, which we could look at here if we wanted.
               for now just warn the user that printing has stopped
               becasue of an error */
            MessageBox(win->hwndFrame, _TR("Couldn't initialize printer"), _TR("Printing problem."), MB_ICONEXCLAMATION | MB_OK | (IsUIRightToLeft() ? MB_RTLREADING : 0));
        }
        goto Exit;
    }

    if (pd.dwResultAction == PD_RESULT_PRINT || pd.dwResultAction == PD_RESULT_APPLY) {
        // remember settings for this process
        LPDEVMODE devMode = (LPDEVMODE)GlobalLock(pd.hDevMode);
        if (devMode) {
            defaultDevMode.Set((LPDEVMODE)memdup(devMode, devMode->dmSize + devMode->dmDriverExtra));
            GlobalUnlock(pd.hDevMode);
        }
        defaultScaleAdv = advanced.scale;
        defaultAsImage = advanced.asImage;
    }

    if (pd.dwResultAction != PD_RESULT_PRINT)
        goto Exit;

    if (pd.Flags & PD_CURRENTPAGE) {
        PRINTPAGERANGE pr = { dm->CurrentPageNo(), dm->CurrentPageNo() };
        ranges.Append(pr);
    } else if (win->selectionOnPage && (pd.Flags & PD_SELECTION)) {
        printSelection = true;
    } else if (!(pd.Flags & PD_PAGENUMS)) {
        PRINTPAGERANGE pr = { 1, dm->PageCount() };
        ranges.Append(pr);
    } else {
        assert(pd.nPageRanges > 0);
        for (DWORD i = 0; i < pd.nPageRanges; i++)
            ranges.Append(pd.lpPageRanges[i]);
    }
//.........这里部分代码省略.........

//.........这里部分代码省略.........
    pd.nMaxPageRanges = MAXPAGERANGES;
    PRINTPAGERANGE *ppr = AllocArray<PRINTPAGERANGE>(MAXPAGERANGES);
    pd.lpPageRanges = ppr;
    ppr->nFromPage = 1;
    ppr->nToPage = dm->PageCount();
    pd.nMinPage = 1;
    pd.nMaxPage = dm->PageCount();
    pd.nStartPage = START_PAGE_GENERAL;

    Print_Advanced_Data advanced(PrintRangeAll, defaultScaleAdv, defaultAsImage);
    ScopedMem<DLGTEMPLATE> dlgTemplate; // needed for RTL languages
    HPROPSHEETPAGE hPsp = CreatePrintAdvancedPropSheet(&advanced, dlgTemplate);
    pd.lphPropertyPages = &hPsp;
    pd.nPropertyPages = 1;

    // restore remembered settings
    if (defaultDevMode) {
        DEVMODE *p = defaultDevMode.Get();
        pd.hDevMode = GlobalMemDup(p, p->dmSize + p->dmDriverExtra);
    }

    if (PrintDlgEx(&pd) != S_OK) {
        if (CommDlgExtendedError() != 0) {
            /* if PrintDlg was cancelled then
               CommDlgExtendedError is zero, otherwise it returns the
               error code, which we could look at here if we wanted.
               for now just warn the user that printing has stopped
               becasue of an error */
            MessageBoxWarning(win->hwndFrame, _TR("Couldn't initialize printer"), 
                              _TR("Printing problem."));
        }
        goto Exit;
    }

    if (pd.dwResultAction == PD_RESULT_PRINT || pd.dwResultAction == PD_RESULT_APPLY) {
        // remember settings for this process
        LPDEVMODE devMode = (LPDEVMODE)GlobalLock(pd.hDevMode);
        if (devMode) {
            defaultDevMode.Set((LPDEVMODE)memdup(devMode, devMode->dmSize + devMode->dmDriverExtra));
            GlobalUnlock(pd.hDevMode);
        }
        defaultScaleAdv = advanced.scale;
        defaultAsImage = advanced.asImage;
    }

    if (pd.dwResultAction != PD_RESULT_PRINT)
        goto Exit;

    if (pd.Flags & PD_CURRENTPAGE) {
        PRINTPAGERANGE pr = { dm->CurrentPageNo(), dm->CurrentPageNo() };
        ranges.Append(pr);
    } else if (win->selectionOnPage && (pd.Flags & PD_SELECTION)) {
        printSelection = true;
    } else if (!(pd.Flags & PD_PAGENUMS)) {
        PRINTPAGERANGE pr = { 1, dm->PageCount() };
        ranges.Append(pr);
    } else {
        assert(pd.nPageRanges > 0);
        for (DWORD i = 0; i < pd.nPageRanges; i++)
            ranges.Append(pd.lpPageRanges[i]);
    }

    LPDEVNAMES devNames = (LPDEVNAMES)GlobalLock(pd.hDevNames);
    LPDEVMODE devMode = (LPDEVMODE)GlobalLock(pd.hDevMode);
    if (devNames) {
        printerInfo.pDriverName = (LPWSTR)devNames + devNames->wDriverOffset;
        printerInfo.pPrinterName = (LPWSTR)devNames + devNames->wDeviceOffset;
        printerInfo.pPortName = (LPWSTR)devNames + devNames->wOutputOffset;
    }
    PrintData *data = new PrintData(dm->engine(), &printerInfo, devMode, ranges, advanced,
                                    dm->GetRotation(), printSelection ? win->selectionOnPage : NULL);
    if (devNames)
        GlobalUnlock(pd.hDevNames);
    if (devMode)
        GlobalUnlock(pd.hDevMode);

    // if a file is missing and the engine can't thus be cloned,
    // we print using the original engine on the main thread
    // so that the document can't be closed and the original engine
    // unexpectedly deleted
    // TODO: instead prevent closing the document so that printing
    // can still happen on a separate thread and be interruptible
    bool failedEngineClone = dm->engine() && !data->engine;
    if (failedEngineClone)
        data->engine = dm->engine();

    if (!waitForCompletion && !failedEngineClone)
        PrintToDeviceOnThread(win, data);
    else {
        PrintToDevice(*data);
        if (failedEngineClone)
            data->engine = NULL;
        delete data;
    }

Exit:
    free(ppr);
    GlobalFree(pd.hDevNames);
    GlobalFree(pd.hDevMode);
}