android.print.PageRange Java Examples

@Override
public void onWrite(
        final PageRange[] pageRanges,
        final ParcelFileDescriptor destination,
        final CancellationSignal cancellationSignal,
        final WriteResultCallback callback
) {
    PdfDocument.Page page = mPdfDocument.startPage(0);

    if (cancellationSignal.isCanceled()) {
        callback.onWriteCancelled();
        mPdfDocument.close();
        mPdfDocument = null;
        return;
    }

    drawPage(page);

    mPdfDocument.finishPage(page);
    try {
        mPdfDocument.writeTo(new FileOutputStream(
                destination.getFileDescriptor()));
    } catch (IOException e) {
        callback.onWriteFailed(e.toString());
        return;
    } finally {
        mPdfDocument.close();
        mPdfDocument = null;
    }
    callback.onWriteFinished(pageRanges);
}
 

/**
 * Gets an array of page ranges and returns an array of integers with all ranges expanded.
 */
private static int[] normalizeRanges(final PageRange[] ranges) {
    // Expand ranges into a list of individual numbers.
    ArrayList<Integer> pages = new ArrayList<Integer>();
    for (PageRange range : ranges) {
        for (int i = range.getStart(); i <= range.getEnd(); i++) {
            pages.add(i);
        }
    }

    // Convert the list into array.
    int[] ret = new int[pages.size()];
    Iterator<Integer> iterator = pages.iterator();
    for (int i = 0; i < ret.length; i++) {
        ret[i] = iterator.next().intValue();
    }
    return ret;
}
 

@Override
public void onWrite(
        final PageRange[] pageRanges,
        final ParcelFileDescriptor destination,
        final CancellationSignal cancellationSignal,
        final WriteResultCallback callback
) {
    PdfDocument.Page page = mPdfDocument.startPage(0);

    if (cancellationSignal.isCanceled()) {
        callback.onWriteCancelled();
        mPdfDocument.close();
        mPdfDocument = null;
        return;
    }

    drawPage(page);

    mPdfDocument.finishPage(page);
    try {
        mPdfDocument.writeTo(new FileOutputStream(
                destination.getFileDescriptor()));
    } catch (IOException e) {
        callback.onWriteFailed(e.toString());
        return;
    } finally {
        mPdfDocument.close();
        mPdfDocument = null;
    }
    callback.onWriteFinished(pageRanges);
}
 

@Override
public void pdfWritingDone(boolean success) {
    if (mPrintingState == PRINTING_STATE_FINISHED) return;
    mPrintingState = PRINTING_STATE_READY;
    if (success) {
        PageRange[] pageRanges = convertIntegerArrayToPageRanges(mPages);
        mOnWriteCallback.onWriteFinished(pageRanges);
    } else {
        mOnWriteCallback.onWriteFailed(mErrorMessage);
        resetCallbacks();
    }
    closeFileDescriptor(mFileDescriptor);
    mFileDescriptor = -1;
}
 

private static PageRange[] convertIntegerArrayToPageRanges(int[] pagesArray) {
    PageRange[] pageRanges;
    if (pagesArray != null) {
        pageRanges = new PageRange[pagesArray.length];
        for (int i = 0; i < pageRanges.length; i++) {
            int page = pagesArray[i];
            pageRanges[i] = new PageRange(page, page);
        }
    } else {
        // null corresponds to all pages in Chromium printing logic.
        pageRanges = new PageRange[] { PageRange.ALL_PAGES };
    }
    return pageRanges;
}
 

@Override
public void onWrite(
        final PageRange[] ranges,
        final ParcelFileDescriptor destination,
        final CancellationSignal cancellationSignal,
        final WriteResultCallback callback) {
    mPdfGenerator.onWrite(ranges, destination, cancellationSignal,
            new WriteResultCallbackWrapperImpl(callback));
}
 

@Override
public void onWrite(
        final PageRange[] ranges,
        final ParcelFileDescriptor destination,
        final CancellationSignal cancellationSignal,
        final PrintDocumentAdapterWrapper.WriteResultCallbackWrapper callback) {
    if (mPrintingContext == null) {
        callback.onWriteFailed(mErrorMessage);
        resetCallbacks();
        return;
    }

    // TODO(cimamoglu): Make use of CancellationSignal.
    mOnWriteCallback = callback;

    mFileDescriptor = destination.getFd();
    // Update file descriptor to PrintingContext mapping in the owner class.
    mPrintingContext.updatePrintingContextMap(mFileDescriptor, false);

    // We need to convert ranges list into an array of individual numbers for
    // easier JNI passing and compatibility with the native side.
    if (ranges.length == 1 && ranges[0].equals(PageRange.ALL_PAGES)) {
        // null corresponds to all pages in Chromium printing logic.
        mPages = null;
    } else {
        mPages = normalizeRanges(ranges);
    }

    if (mPrintingState == PRINTING_STATE_READY) {
        // If this onWrite is without a preceding onLayout, start Chromium PDF generation here.
        if (mPrintable.print()) {
            mPrintingState = PRINTING_STATE_STARTED_FROM_ONWRITE;
        } else {
            callback.onWriteFailed(mErrorMessage);
            resetCallbacks();
        }
    } else if (mPrintingState == PRINTING_STATE_STARTED_FROM_ONLAYOUT) {
        // Otherwise, continue previously started operation.
        mPrintingContext.askUserForSettingsReply(true);
    }
    // We are guaranteed by the framework that we will not have two onWrite calls at once.
    // We may get a CancellationSignal, after replying it (via WriteResultCallback) we might
    // get another onWrite call.
}
 

void onWrite(
final PageRange[] ranges,
final ParcelFileDescriptor destination,
final CancellationSignal cancellationSignal,
final PrintDocumentAdapterWrapper.WriteResultCallbackWrapper callback);
 

@Override
public void onWriteFinished(PageRange[] pages) {
    mCallback.onWriteFinished(pages);
}
 

@Override
public void onWrite(PageRange[] pages, ParcelFileDescriptor destination,
                    CancellationSignal cancellationSignal,
                    WriteResultCallback callback) {
    delegate.onWrite(pages, destination, cancellationSignal, callback);
}
 

void onWriteFinished(PageRange[] pages);