Examples with COSBase com.tom_roush.pdfbox.cos.COSBase used on opensource projects

Example 16 with COSBase

use of com.tom_roush.pdfbox.cos.COSBase in project PdfBox-Android by TomRoush.

the class ContentStreamWriter method writeObject.

private void writeObject(Object o) throws IOException {
    if (o instanceof COSString) {
        COSWriter.writeString((COSString) o, output);
        output.write(SPACE);
    } else if (o instanceof COSFloat) {
        ((COSFloat) o).writePDF(output);
        output.write(SPACE);
    } else if (o instanceof COSInteger) {
        ((COSInteger) o).writePDF(output);
        output.write(SPACE);
    } else if (o instanceof COSBoolean) {
        ((COSBoolean) o).writePDF(output);
        output.write(SPACE);
    } else if (o instanceof COSName) {
        ((COSName) o).writePDF(output);
        output.write(SPACE);
    } else if (o instanceof COSArray) {
        COSArray array = (COSArray) o;
        output.write(COSWriter.ARRAY_OPEN);
        for (int i = 0; i < array.size(); i++) {
            writeObject(array.get(i));
            output.write(SPACE);
        }
        output.write(COSWriter.ARRAY_CLOSE);
    } else if (o instanceof COSDictionary) {
        COSDictionary obj = (COSDictionary) o;
        output.write(COSWriter.DICT_OPEN);
        for (Map.Entry<COSName, COSBase> entry : obj.entrySet()) {
            if (entry.getValue() != null) {
                writeObject(entry.getKey());
                output.write(SPACE);
                writeObject(entry.getValue());
                output.write(SPACE);
            }
        }
        output.write(COSWriter.DICT_CLOSE);
        output.write(SPACE);
    } else if (o instanceof Operator) {
        Operator op = (Operator) o;
        if (op.getName().equals(OperatorName.BEGIN_INLINE_IMAGE)) {
            output.write(OperatorName.BEGIN_INLINE_IMAGE.getBytes(Charsets.ISO_8859_1));
            COSDictionary dic = op.getImageParameters();
            for (COSName key : dic.keySet()) {
                Object value = dic.getDictionaryObject(key);
                key.writePDF(output);
                output.write(SPACE);
                writeObject(value);
                output.write(EOL);
            }
            output.write(OperatorName.BEGIN_INLINE_IMAGE_DATA.getBytes(Charsets.ISO_8859_1));
            output.write(EOL);
            output.write(op.getImageData());
            output.write(EOL);
            output.write(OperatorName.END_INLINE_IMAGE.getBytes(Charsets.ISO_8859_1));
            output.write(EOL);
        } else {
            output.write(op.getName().getBytes(Charsets.ISO_8859_1));
            output.write(EOL);
        }
    } else {
        throw new IOException("Error:Unknown type in content stream:" + o);
    }
}

Example 17 with COSBase

use of com.tom_roush.pdfbox.cos.COSBase in project PdfBox-Android by TomRoush.

the class PDFObjectStreamParser method parse.

/**
 * This will parse the tokens in the stream.  This will close the
 * stream when it is finished parsing.
 *
 * @throws IOException If there is an error while parsing the stream.
 */
public void parse() throws IOException {
    try {
        Map<Integer, Long> offsets = readOffsets();
        streamObjects = new ArrayList<COSObject>(offsets.size());
        for (Entry<Integer, Long> offset : offsets.entrySet()) {
            COSBase cosObject = parseObject(offset.getKey());
            COSObject object = new COSObject(cosObject);
            object.setGenerationNumber(0);
            object.setObjectNumber(offset.getValue());
            streamObjects.add(object);
            if (PDFBoxConfig.isDebugEnabled()) {
                Log.d("PdfBox-Android", "parsed=" + object);
            }
        }
    } finally {
        seqSource.close();
    }
}

Example 18 with COSBase

use of com.tom_roush.pdfbox.cos.COSBase in project PdfBox-Android by TomRoush.

the class PDFStreamParser method parseNextToken.

/**
 * This will parse the next token in the stream.
 *
 * @return The next token in the stream or null if there are no more tokens in the stream.
 *
 * @throws IOException If an io error occurs while parsing the stream.
 */
public Object parseNextToken() throws IOException {
    Object retval;
    skipSpaces();
    int nextByte = seqSource.peek();
    if (((byte) nextByte) == -1) {
        return null;
    }
    char c = (char) nextByte;
    switch(c) {
        case '<':
            {
                // pull off first left bracket
                int leftBracket = seqSource.read();
                // check for second left bracket
                c = (char) seqSource.peek();
                // put back first bracket
                seqSource.unread(leftBracket);
                if (c == '<') {
                    retval = parseCOSDictionary();
                } else {
                    retval = parseCOSString();
                }
                break;
            }
        case '[':
            {
                // array
                retval = parseCOSArray();
                break;
            }
        case '(':
            // string
            retval = parseCOSString();
            break;
        case '/':
            // name
            retval = parseCOSName();
            break;
        case 'n':
            {
                // null
                String nullString = readString();
                if (nullString.equals("null")) {
                    retval = COSNull.NULL;
                } else {
                    retval = Operator.getOperator(nullString);
                }
                break;
            }
        case 't':
        case 'f':
            {
                String next = readString();
                if (next.equals("true")) {
                    retval = COSBoolean.TRUE;
                    break;
                } else if (next.equals("false")) {
                    retval = COSBoolean.FALSE;
                } else {
                    retval = Operator.getOperator(next);
                }
                break;
            }
        case 'R':
            {
                String line = readString();
                if (line.equals("R")) {
                    retval = new COSObject(null);
                } else {
                    retval = Operator.getOperator(line);
                }
                break;
            }
        case '0':
        case '1':
        case '2':
        case '3':
        case '4':
        case '5':
        case '6':
        case '7':
        case '8':
        case '9':
        case '-':
        case '+':
        case '.':
            {
                /* We will be filling buf with the rest of the number.  Only
                 * allow 1 "." and "-" and "+" at start of number. */
                StringBuilder buf = new StringBuilder();
                buf.append(c);
                seqSource.read();
                // Ignore double negative (this is consistent with Adobe Reader)
                if (c == '-' && seqSource.peek() == c) {
                    seqSource.read();
                }
                boolean dotNotRead = c != '.';
                while (Character.isDigit(c = (char) seqSource.peek()) || dotNotRead && c == '.' || c == '-') {
                    if (c != '-') {
                        // PDFBOX-4064: ignore "-" in the middle of a number
                        buf.append(c);
                    }
                    seqSource.read();
                    if (dotNotRead && c == '.') {
                        dotNotRead = false;
                    }
                }
                retval = COSNumber.get(buf.toString());
                break;
            }
        case 'B':
            {
                String next = readString();
                retval = Operator.getOperator(next);
                if (next.equals(OperatorName.BEGIN_INLINE_IMAGE)) {
                    Operator beginImageOP = (Operator) retval;
                    COSDictionary imageParams = new COSDictionary();
                    beginImageOP.setImageParameters(imageParams);
                    Object nextToken = null;
                    while ((nextToken = parseNextToken()) instanceof COSName) {
                        Object value = parseNextToken();
                        imageParams.setItem((COSName) nextToken, (COSBase) value);
                    }
                    // final token will be the image data, maybe??
                    if (nextToken instanceof Operator) {
                        Operator imageData = (Operator) nextToken;
                        if (imageData.getImageData() == null || imageData.getImageData().length == 0) {
                            Log.w("PdfBox-Android", "empty inline image at stream offset " + seqSource.getPosition());
                        }
                        beginImageOP.setImageData(imageData.getImageData());
                    }
                }
                break;
            }
        case 'I':
            {
                // Special case for ID operator
                String id = Character.toString((char) seqSource.read()) + (char) seqSource.read();
                if (!id.equals(OperatorName.BEGIN_INLINE_IMAGE_DATA)) {
                    throw new IOException("Error: Expected operator 'ID' actual='" + id + "' at stream offset " + seqSource.getPosition());
                }
                ByteArrayOutputStream imageData = new ByteArrayOutputStream();
                if (isWhitespace()) {
                    // pull off the whitespace character
                    seqSource.read();
                }
                int lastByte = seqSource.read();
                int currentByte = seqSource.read();
                // Be aware not all kind of whitespaces are allowed here. see PDFBOX-1561
                while (!(lastByte == 'E' && currentByte == 'I' && hasNextSpaceOrReturn() && hasNoFollowingBinData(seqSource)) && !seqSource.isEOF()) {
                    imageData.write(lastByte);
                    lastByte = currentByte;
                    currentByte = seqSource.read();
                }
                // the EI operator isn't unread, as it won't be processed anyway
                retval = Operator.getOperator(OperatorName.BEGIN_INLINE_IMAGE_DATA);
                // save the image data to the operator, so that it can be accessed later
                ((Operator) retval).setImageData(imageData.toByteArray());
                break;
            }
        case ']':
            {
                // some ']' around without its previous '['
                // this means a PDF is somewhat corrupt but we will continue to parse.
                seqSource.read();
                // must be a better solution than null...
                retval = COSNull.NULL;
                break;
            }
        default:
            {
                // we must be an operator
                String operator = readOperator();
                if (operator.trim().length() == 0) {
                    // we have a corrupt stream, stop reading here
                    retval = null;
                } else {
                    retval = Operator.getOperator(operator);
                }
            }
    }
    return retval;
}

Example 19 with COSBase

use of com.tom_roush.pdfbox.cos.COSBase in project PdfBox-Android by TomRoush.

the class LayerUtility method wrapInSaveRestore.

/**
 * Some applications may not wrap their page content in a save/restore (q/Q) pair which can
 * lead to problems with coordinate system transformations when content is appended. This
 * method lets you add a q/Q pair around the existing page's content.
 * @param page the page
 * @throws IOException if an I/O error occurs
 */
public void wrapInSaveRestore(PDPage page) throws IOException {
    COSStream saveGraphicsStateStream = getDocument().getDocument().createCOSStream();
    OutputStream saveStream = saveGraphicsStateStream.createOutputStream();
    saveStream.write("q\n".getBytes("ISO-8859-1"));
    saveStream.close();
    COSStream restoreGraphicsStateStream = getDocument().getDocument().createCOSStream();
    OutputStream restoreStream = restoreGraphicsStateStream.createOutputStream();
    restoreStream.write("Q\n".getBytes("ISO-8859-1"));
    restoreStream.close();
    // Wrap the existing page's content in a save/restore pair (q/Q) to have a controlled
    // environment to add additional content.
    COSDictionary pageDictionary = page.getCOSObject();
    COSBase contents = pageDictionary.getDictionaryObject(COSName.CONTENTS);
    if (contents instanceof COSStream) {
        COSStream contentsStream = (COSStream) contents;
        COSArray array = new COSArray();
        array.add(saveGraphicsStateStream);
        array.add(contentsStream);
        array.add(restoreGraphicsStateStream);
        pageDictionary.setItem(COSName.CONTENTS, array);
    } else if (contents instanceof COSArray) {
        COSArray contentsArray = (COSArray) contents;
        contentsArray.add(0, saveGraphicsStateStream);
        contentsArray.add(restoreGraphicsStateStream);
    } else {
        throw new IOException("Contents are unknown type: " + contents.getClass().getName());
    }
}

Example 20 with COSBase

use of com.tom_roush.pdfbox.cos.COSBase in project PdfBox-Android by TomRoush.

the class COSParser method parseDictionaryRecursive.

/**
 * Resolves all not already parsed objects of a dictionary recursively.
 *
 * @param dictionaryObject dictionary to be parsed
 * @throws IOException if something went wrong
 */
private void parseDictionaryRecursive(COSObject dictionaryObject) throws IOException {
    parseObjectDynamically(dictionaryObject, true);
    if (!(dictionaryObject.getObject() instanceof COSDictionary)) {
        // to get the encryption directory
        throw new IOException("Dictionary object expected at offset " + source.getPosition());
    }
    COSDictionary dictionary = (COSDictionary) dictionaryObject.getObject();
    for (COSBase value : dictionary.getValues()) {
        if (value instanceof COSObject) {
            COSObject object = (COSObject) value;
            if (object.getObject() == null) {
                parseDictionaryRecursive(object);
            }
        }
    }
}