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

Example 26 with COSDictionary

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

the class COSParser method parseXref.

/**
 * Parses cross reference tables.
 *
 * @param startXRefOffset start offset of the first table
 * @return the trailer dictionary
 * @throws IOException if something went wrong
 */
protected COSDictionary parseXref(long startXRefOffset) throws IOException {
    source.seek(startXRefOffset);
    long startXrefOffset = Math.max(0, parseStartXref());
    // check the startxref offset
    long fixedOffset = checkXRefOffset(startXrefOffset);
    if (fixedOffset > -1) {
        startXrefOffset = fixedOffset;
    }
    document.setStartXref(startXrefOffset);
    long prev = startXrefOffset;
    // ---- parse whole chain of xref tables/object streams using PREV reference
    Set<Long> prevSet = new HashSet<Long>();
    while (prev > 0) {
        // seek to xref table
        source.seek(prev);
        // skip white spaces
        skipSpaces();
        // -- parse xref
        if (source.peek() == X) {
            // use existing parser to parse xref table
            if (!parseXrefTable(prev) || !parseTrailer()) {
                throw new IOException("Expected trailer object at offset " + source.getPosition());
            }
            COSDictionary trailer = xrefTrailerResolver.getCurrentTrailer();
            // check for a XRef stream, it may contain some object ids of compressed objects
            if (trailer.containsKey(COSName.XREF_STM)) {
                int streamOffset = trailer.getInt(COSName.XREF_STM);
                // check the xref stream reference
                fixedOffset = checkXRefOffset(streamOffset);
                if (fixedOffset > -1 && fixedOffset != streamOffset) {
                    Log.w("PdfBox-Android", "/XRefStm offset " + streamOffset + " is incorrect, corrected to " + fixedOffset);
                    streamOffset = (int) fixedOffset;
                    trailer.setInt(COSName.XREF_STM, streamOffset);
                }
                if (streamOffset > 0) {
                    source.seek(streamOffset);
                    skipSpaces();
                    try {
                        parseXrefObjStream(prev, false);
                    } catch (IOException ex) {
                        if (isLenient) {
                            Log.e("PdfBox-Android", "Failed to parse /XRefStm at offset " + streamOffset, ex);
                        } else {
                            throw ex;
                        }
                    }
                } else {
                    if (isLenient) {
                        Log.e("PdfBox-Android", "Skipped XRef stream due to a corrupt offset:" + streamOffset);
                    } else {
                        throw new IOException("Skipped XRef stream due to a corrupt offset:" + streamOffset);
                    }
                }
            }
            prev = trailer.getLong(COSName.PREV);
            if (prev > 0) {
                // check the xref table reference
                fixedOffset = checkXRefOffset(prev);
                if (fixedOffset > -1 && fixedOffset != prev) {
                    prev = fixedOffset;
                    trailer.setLong(COSName.PREV, prev);
                }
            }
        } else {
            // parse xref stream
            prev = parseXrefObjStream(prev, true);
            if (prev > 0) {
                // check the xref table reference
                fixedOffset = checkXRefOffset(prev);
                if (fixedOffset > -1 && fixedOffset != prev) {
                    prev = fixedOffset;
                    COSDictionary trailer = xrefTrailerResolver.getCurrentTrailer();
                    trailer.setLong(COSName.PREV, prev);
                }
            }
        }
        if (prevSet.contains(prev)) {
            throw new IOException("/Prev loop at offset " + prev);
        }
        prevSet.add(prev);
    }
    // ---- build valid xrefs out of the xref chain
    xrefTrailerResolver.setStartxref(startXrefOffset);
    COSDictionary trailer = xrefTrailerResolver.getTrailer();
    document.setTrailer(trailer);
    document.setIsXRefStream(XRefType.STREAM == xrefTrailerResolver.getXrefType());
    // check the offsets of all referenced objects
    checkXrefOffsets();
    // copy xref table
    document.addXRefTable(xrefTrailerResolver.getXrefTable());
    return trailer;
}

Example 27 with COSDictionary

use of com.tom_roush.pdfbox.cos.COSDictionary 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);
            }
        }
    }
}

Example 28 with COSDictionary

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

the class COSParser method retrieveCOSDictionary.

private COSDictionary retrieveCOSDictionary(COSObjectKey key, long offset) throws IOException {
    COSDictionary dictionary = null;
    // handle compressed objects
    if (offset < 0) {
        COSObject compressedObject = document.getObjectFromPool(key);
        if (compressedObject.getObject() == null) {
            parseObjectStream((int) -offset);
        }
        COSBase baseObject = compressedObject.getObject();
        if (baseObject instanceof COSDictionary) {
            dictionary = (COSDictionary) baseObject;
        }
    } else {
        source.seek(offset);
        readObjectNumber();
        readGenerationNumber();
        readExpectedString(OBJ_MARKER, true);
        if (source.peek() != '<') {
            return null;
        }
        try {
            dictionary = parseCOSDictionary();
        } catch (IOException exception) {
            Log.d("PdfBox-Android", "Skipped object " + key + ", either it's corrupt or not a dictionary");
        }
    }
    return dictionary;
}

Example 29 with COSDictionary

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

the class PDAnnotation method createAnnotation.

/**
 * Create the correct annotation from the base COS object.
 *
 * @param base The COS object that is the annotation.
 * @return The correctly typed annotation object.
 *
 * @throws IOException If the annotation type is unknown.
 */
public static PDAnnotation createAnnotation(COSBase base) throws IOException {
    PDAnnotation annot = null;
    if (base instanceof COSDictionary) {
        COSDictionary annotDic = (COSDictionary) base;
        String subtype = annotDic.getNameAsString(COSName.SUBTYPE);
        if (PDAnnotationFileAttachment.SUB_TYPE.equals(subtype)) {
            annot = new PDAnnotationFileAttachment(annotDic);
        } else if (PDAnnotationLine.SUB_TYPE.equals(subtype)) {
            annot = new PDAnnotationLine(annotDic);
        } else if (PDAnnotationLink.SUB_TYPE.equals(subtype)) {
            annot = new PDAnnotationLink(annotDic);
        } else if (PDAnnotationPopup.SUB_TYPE.equals(subtype)) {
            annot = new PDAnnotationPopup(annotDic);
        } else if (PDAnnotationRubberStamp.SUB_TYPE.equals(subtype)) {
            annot = new PDAnnotationRubberStamp(annotDic);
        } else if (PDAnnotationSquareCircle.SUB_TYPE_SQUARE.equals(subtype) || PDAnnotationSquareCircle.SUB_TYPE_CIRCLE.equals(subtype)) {
            annot = new PDAnnotationSquareCircle(annotDic);
        } else if (PDAnnotationText.SUB_TYPE.equals(subtype)) {
            annot = new PDAnnotationText(annotDic);
        } else if (PDAnnotationTextMarkup.SUB_TYPE_HIGHLIGHT.equals(subtype) || PDAnnotationTextMarkup.SUB_TYPE_UNDERLINE.equals(subtype) || PDAnnotationTextMarkup.SUB_TYPE_SQUIGGLY.equals(subtype) || PDAnnotationTextMarkup.SUB_TYPE_STRIKEOUT.equals(subtype)) {
            // see 12.5.6.10 Text Markup Annotations
            annot = new PDAnnotationTextMarkup(annotDic);
        } else if (PDAnnotationWidget.SUB_TYPE.equals(subtype)) {
            annot = new PDAnnotationWidget(annotDic);
        } else if (PDAnnotationMarkup.SUB_TYPE_FREETEXT.equals(subtype) || PDAnnotationMarkup.SUB_TYPE_POLYGON.equals(subtype) || PDAnnotationMarkup.SUB_TYPE_POLYLINE.equals(subtype) || PDAnnotationMarkup.SUB_TYPE_CARET.equals(subtype) || PDAnnotationMarkup.SUB_TYPE_INK.equals(subtype) || PDAnnotationMarkup.SUB_TYPE_SOUND.equals(subtype)) {
            annot = new PDAnnotationMarkup(annotDic);
        } else {
            // TODO not yet implemented:
            // Movie, Screen, PrinterMark, TrapNet, Watermark, 3D, Redact
            annot = new PDAnnotationUnknown(annotDic);
            Log.d("PdfBox-Android", "Unknown or unsupported annotation subtype " + subtype);
        }
    } else {
        throw new IOException("Error: Unknown annotation type " + base);
    }
    return annot;
}

Example 30 with COSDictionary

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

the class PDPropBuild method getPubSec.

/**
 * A build data dictionary for the PubSec software module
 * that was used to create the parent signature.
 *
 * @return the PubSec as PDPropBuildPubSec object
 */
public PDPropBuildDataDict getPubSec() {
    PDPropBuildDataDict pubSec = null;
    COSDictionary pubSecDic = dictionary.getCOSDictionary(COSName.PUB_SEC);
    if (pubSecDic != null) {
        pubSec = new PDPropBuildDataDict(pubSecDic);
    }
    return pubSec;
}