/**
* Constructor.
*
* @param array The array of COSStreams to concatenate together.
*/
public COSStreamArray(COSArray array) {
super(new COSDictionary(), null);
streams = array;
if (array.size() > 0) {
firstStream = (COSStream) array.getObject(0);
}
}
/**
* This will get the average font width for all characters.
*
* @return The width is in 1000 unit of text space, ie 333 or 777
* @throws IOException If an error occurs while parsing.
*/
public float getAverageFontWidth() throws IOException {
float average = 0.0f;
if (avgFontWidth != 0.0f) {
average = avgFontWidth;
} else {
float totalWidth = 0.0f;
float characterCount = 0.0f;
COSArray widths = (COSArray) font.getDictionaryObject(COSName.WIDTHS);
if (widths != null) {
for (int i = 0; i < widths.size(); i++) {
COSNumber fontWidth = (COSNumber) widths.getObject(i);
if (fontWidth.floatValue() > 0) {
totalWidth += fontWidth.floatValue();
characterCount += 1;
}
}
}
if (totalWidth > 0) {
average = totalWidth / characterCount;
} else {
average = getAverageFontWidthFromAFMFile();
}
avgFontWidth = average;
}
return average;
}
protected PDFunction getTintTransformer(COSStream xstream) throws IOException {
COSBase cs = xstream.getDictionaryObject(COSName.COLORSPACE, COSName.CS);
if (cs == null) {
return null;
}
COSArray array = getCOSArray(cs);
if (array == null) {
return null;
}
String name = ((COSName) array.getObject(0)).getName();
if (name.equals("DeviceN")) {
PDFunction function = PDFunction.create(array.getObject(3));
return function;
}
return null;
}
/**
* Returns this field's children. These may be either terminal or non-terminal fields.
*
* @return he list of child fields.
*/
public List<PDField> getChildren() {
List<PDField> children = new ArrayList<PDField>();
COSArray kids = (COSArray) getCOSObject().getDictionaryObject(COSName.KIDS);
for (int i = 0; i < kids.size(); i++) {
PDField field =
PDField.fromDictionary(getAcroForm(), (COSDictionary) kids.getObject(i), this);
if (field != null) {
children.add(field);
}
}
return children;
}
/**
* This will get the logical content stream with none of the filters.
*
* @return the bytes of the logical (decoded) stream
* @throws IOException when encoding/decoding causes an exception
*/
public InputStream getUnfilteredStream() throws IOException {
Vector<InputStream> inputStreams = new Vector<InputStream>();
byte[] inbetweenStreamBytes = "\n".getBytes("ISO-8859-1");
for (int i = 0; i < streams.size(); i++) {
COSStream stream = (COSStream) streams.getObject(i);
inputStreams.add(stream.getUnfilteredStream());
// handle the case where there is no whitespace in the
// between streams in the contents array, without this
// it is possible that two operators will get concatenated
// together
inputStreams.add(new ByteArrayInputStream(inbetweenStreamBytes));
}
return new SequenceInputStream(inputStreams.elements());
}
/**
* This will find one of the child elements. The name array are the components of the name to
* search down the tree of names. The nameIndex is where to start in that array. This method is
* called recursively until it finds the end point based on the name array.
*
* @param name An array that picks the path to the field.
* @param nameIndex The index into the array.
* @return The field at the endpoint or null if none is found.
*/
PDField findKid(String[] name, int nameIndex) {
PDField retval = null;
COSArray kids = (COSArray) dictionary.getDictionaryObject(COSName.KIDS);
if (kids != null) {
for (int i = 0; retval == null && i < kids.size(); i++) {
COSDictionary kidDictionary = (COSDictionary) kids.getObject(i);
if (name[nameIndex].equals(kidDictionary.getString(COSName.T))) {
retval = PDField.fromDictionary(acroForm, kidDictionary, (PDNonTerminalField) this);
if (retval != null && name.length > nameIndex + 1) {
retval = retval.findKid(name, nameIndex + 1);
}
}
}
}
return retval;
}
/**
* This will get the next action, or sequence of actions, to be performed after this one. The
* value is either a single action dictionary or an array of action dictionaries to be performed
* in order.
*
* @return The Next action or sequence of actions.
*/
public List getNext() {
List retval = null;
COSBase next = action.getDictionaryObject("Next");
if (next instanceof COSDictionary) {
PDAction pdAction = PDActionFactory.createAction((COSDictionary) next);
retval = new COSArrayList(pdAction, next, action, COSName.getPDFName("Next"));
} else if (next instanceof COSArray) {
COSArray array = (COSArray) next;
List actions = new ArrayList();
for (int i = 0; i < array.size(); i++) {
actions.add(PDActionFactory.createAction((COSDictionary) array.getObject(i)));
}
retval = new COSArrayList(actions, array);
}
return retval;
}
/**
* This will get the maximum value of the range.
*
* @return The max value.
*/
public float getMax() {
COSNumber max = (COSNumber) rangeArray.getObject(startingIndex * 2 + 1);
return max.floatValue();
}
/**
* This will get the minimum value of the range.
*
* @return The min value.
*/
public float getMin() {
COSNumber min = (COSNumber) rangeArray.getObject(startingIndex * 2);
return min.floatValue();
}
