org.jpedal.io.ObjectDecoder Maven / Gradle / Ivy
/*
* ===========================================
* Java Pdf Extraction Decoding Access Library
* ===========================================
*
* Project Info: http://www.idrsolutions.com
* Help section for developers at http://www.idrsolutions.com/support/
*
* (C) Copyright 1997-2015 IDRsolutions and Contributors.
*
* This file is part of JPedal/JPDF2HTML5
*
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* ---------------
* ObjectDecoder.java
* ---------------
*/
package org.jpedal.io;
import org.jpedal.io.types.*;
import org.jpedal.objects.raw.*;
import org.jpedal.color.ColorSpaces;
import org.jpedal.utils.*;
import java.io.*;
/**
*
*/
public class ObjectDecoder implements Serializable {
public PdfFileReader objectReader;
public DecryptionFactory decryption;
//string representation of key only used in debugging
private Object PDFkey;
static final byte[] endPattern = { 101, 110, 100, 111, 98, 106 }; //pattern endobj
//
public static final boolean debugFastCode =false; //objRef.equals("68 0 R")
/**/
private int pdfKeyType, PDFkeyInt;
/**used in debugging output*/
public static String padding="";
boolean isInlineImage;
private int endPt=-1;
public ObjectDecoder(final PdfFileReader pdfFileReader) {
init(pdfFileReader);
}
private void init(final PdfFileReader objectReader){
this.objectReader=objectReader;
this.decryption=objectReader.getDecryptionObject();
}
/**
* read a dictionary object
*/
public int readDictionaryAsObject(final PdfObject pdfObject, int i, final byte[] raw){
if(endPt==-1) {
endPt = raw.length;
}
//used to debug issues by printing out details for obj
//(set to non-final above)
//debugFastCode =pdfObject.getObjectRefAsString().equals("5 0 R");
if(debugFastCode) {
padding += " ";
}
final int length=raw.length;
//show details in debug mode
if(debugFastCode) {
ObjectUtils.showData(pdfObject, i, length, raw, padding);
}
/**
* main loop for read all values from Object data and store in PDF object
*/
i = readObjectDataValues(pdfObject, i, raw, length);
/**
* look for stream afterwards
*/
if(!pdfObject.ignoreStream() && pdfObject.getGeneralType(-1)!=PdfDictionary.ID) {
Stream.readStreamData(pdfObject, i, raw, length, objectReader);
}
/**
* we need full names for Forms
*/
if(pdfObject.getObjectType()==PdfDictionary.Form) {
Form.setFieldNames(pdfObject, objectReader);
}
/**
* reset indent in debugging
*/
if(debugFastCode){
final int len=padding.length();
if(len>3) {
padding = padding.substring(0, len - 3);
}
}
return i;
}
/**
* get the values from the data stream and store in PdfObject
* @param pdfObject
* @param i
* @param raw
* @param length
* @return
*/
private int readObjectDataValues(final PdfObject pdfObject, int i, final byte[] raw, final int length) {
int level=0;
//allow for no << at start
if(isInlineImage) {
level = 1;
}
while(true){
if(i=length ||
(endPt !=-1 && i>= endPt))||
(raw[i] == 101 && raw[i + 1] == 110 && raw[i + 2] == 100 && raw[i + 3] == 111)||
(raw[i]=='s' && raw[i+1]=='t' && raw[i+2]=='r' && raw[i+3]=='e' && raw[i+4]=='a' && raw[i+5]=='m')) {
break;
}
/**
* process value
*/
if(raw[i]==60 && raw[i+1]==60){
i++;
level++;
}else if(raw[i]==62 && i+1!=length && raw[i+1]==62 && raw[i-1]!=62){
i++;
level--;
if(level==0) {
break;
}
}else if (raw[i] == 47 && (raw[i+1] == 47 || raw[i+1]==32)) { //allow for oddity of //DeviceGray and / /DeviceGray in colorspace
i++;
}else if (raw[i] == 47) { //everything from /
i++; //skip /
final int keyStart=i;
final int keyLength= Dictionary.findDictionaryEnd(i, raw, length);
i += keyLength;
if(i==length) {
break;
}
//if BDC see if string
boolean isStringPair=false;
if(pdfObject.getID()== PdfDictionary.BDC) {
isStringPair = Dictionary.isStringPair(i, raw, isStringPair);
}
final int type=pdfObject.getObjectType();
if(debugFastCode) {
System.out.println("type=" + type + ' ' + ' ' + pdfObject.getID() + " chars=" + (char) raw[i - 1] + (char) raw[i] + (char) raw[i + 1] + ' ' + pdfObject + " i=" + i + ' ' + isStringPair);
}
//see if map of objects
final boolean isMap = isMapObject(pdfObject, i, raw, length, keyStart, keyLength, isStringPair, type);
if(raw[i]==47 || raw[i]==40 || (raw[i] == 91 && raw[i+1]!=']')) //move back cursor
{
i--;
}
//check for unknown value and ignore
if(pdfKeyType==-1) {
i = ObjectUtils.handleUnknownType(i, raw, length);
}
/**
* now read value
*/
if(PDFkeyInt==-1 || pdfKeyType==-1){
if(debugFastCode) {
System.out.println(padding + pdfObject.getObjectRefAsString() + " =================Not implemented=" + PDFkey + " pdfKeyType=" + pdfKeyType);
}
}else{
i = setValue(pdfObject, i, raw, length, isMap);
}
//special case if Dest defined as names object and indirect
}else if(raw[i]=='[' && level==0 && pdfObject.getObjectType()==PdfDictionary.Outlines){
final Array objDecoder=new Array(objectReader,i, raw.length, PdfDictionary.VALUE_IS_MIXED_ARRAY,null, PdfDictionary.Names);
objDecoder.readArray(false, raw, pdfObject, PdfDictionary.Dest);
}
i++;
}
return i;
}
private boolean isMapObject(final PdfObject pdfObject, final int i, final byte[] raw, final int length, final int keyStart, final int keyLength, final boolean stringPair, final int type) {
final boolean isMap;//ensure all go into 'pool'
if(type== PdfDictionary.MCID && (pdfObject.getID()==PdfDictionary.RoleMap ||
(pdfObject.getID()==PdfDictionary.BDC && stringPair) ||
(pdfObject.getID()==PdfDictionary.A && raw[i-2]=='/'))){
pdfKeyType=PdfDictionary.VALUE_IS_NAME;
//used in debug and this case
PDFkey=PdfDictionary.getKey(keyStart,keyLength,raw);
PDFkeyInt=PdfDictionary.MCID;
isMap=true;
}else{
isMap=false;
PDFkey=null;
getKeyType(pdfObject, i, raw, length, keyLength, keyStart, type);
}
return isMap;
}
private void getKeyType(final PdfObject pdfObject, final int i, final byte[] raw, final int length, final int keyLength, final int keyStart, final int type) {
/**
* get Dictionary key and type of value it takes
*/
if(debugFastCode)//used in debug
{
PDFkey = PdfDictionary.getKey(keyStart, keyLength, raw);
}
PDFkeyInt=PdfDictionary.getIntKey(keyStart,keyLength,raw);
//correct mapping
if(PDFkeyInt==PdfDictionary.Indexed && (type==PdfDictionary.MK ||type==PdfDictionary.Form || type==PdfDictionary.Linearized || type==PdfDictionary.Group)) {
PDFkeyInt = PdfDictionary.I;
}
if(isInlineImage) {
PDFkeyInt = PdfObjectFactory.getInlineID(PDFkeyInt);
}
final int id=pdfObject.getID();
if(type==PdfDictionary.Resources && (PDFkeyInt==PdfDictionary.ColorSpace
|| PDFkeyInt==PdfDictionary.ExtGState || PDFkeyInt==PdfDictionary.Shading
|| PDFkeyInt==PdfDictionary.XObject || PDFkeyInt==PdfDictionary.Font|| PDFkeyInt==PdfDictionary.Pattern)){
pdfKeyType=PdfDictionary.VALUE_IS_DICTIONARY_PAIRS;
//}else if (type==PdfDictionary.Form && id== PdfDictionary.AA && PDFkeyInt== PdfDictionary.K){
// pdfKeyType= PdfDictionary.VALUE_IS_UNREAD_DICTIONARY;
}else if (type==PdfDictionary.Outlines && PDFkeyInt== PdfDictionary.D){
PDFkeyInt= PdfDictionary.Dest;
pdfKeyType= PdfDictionary.VALUE_IS_MIXED_ARRAY;
}else if ((type==PdfDictionary.Form || type==PdfDictionary.MK) && PDFkeyInt== PdfDictionary.D){
if(id==PdfDictionary.AP || id==PdfDictionary.AA){
pdfKeyType= PdfDictionary.VALUE_IS_VARIOUS;
}else if(id==PdfDictionary.Win){
pdfKeyType= PdfDictionary.VALUE_IS_TEXTSTREAM;
}else{
PDFkeyInt= PdfDictionary.Dest;
pdfKeyType= PdfDictionary.VALUE_IS_MIXED_ARRAY;
}
}else if ((type==PdfDictionary.Form || type==PdfDictionary.MK) && (id==PdfDictionary.AP || id==PdfDictionary.AA) && PDFkeyInt== PdfDictionary.A){
pdfKeyType= PdfDictionary.VALUE_IS_VARIOUS;
}else if (PDFkeyInt== PdfDictionary.Order && type==PdfDictionary.OCProperties){
pdfKeyType= PdfDictionary. VALUE_IS_OBJECT_ARRAY;
}else if (PDFkeyInt== PdfDictionary.Name && type==PdfDictionary.OCProperties){
pdfKeyType= PdfDictionary.VALUE_IS_TEXTSTREAM;
}else if ((type==PdfDictionary.ColorSpace || type==PdfDictionary.Function) && PDFkeyInt== PdfDictionary.N){
pdfKeyType= PdfDictionary.VALUE_IS_FLOAT;
}else if(PDFkeyInt==PdfDictionary.Gamma && type==PdfDictionary.ColorSpace &&
pdfObject.getParameterConstant(PdfDictionary.ColorSpace)== ColorSpaces.CalGray){ //its a number not an array
pdfKeyType= PdfDictionary.VALUE_IS_FLOAT;
}else if(id==PdfDictionary.Win && pdfObject.getObjectType()==PdfDictionary.Form &&
(PDFkeyInt==PdfDictionary.P || PDFkeyInt==PdfDictionary.O)){
pdfKeyType= PdfDictionary.VALUE_IS_TEXTSTREAM;
}else if (isInlineImage && PDFkeyInt==PdfDictionary.ColorSpace){
pdfKeyType= PdfDictionary.VALUE_IS_DICTIONARY;
}else {
pdfKeyType = PdfDictionary.getKeyType(PDFkeyInt, type);
}
//handle array of Function in Shading by using keyArray
if(id==PdfDictionary.Shading && PDFkeyInt==PdfDictionary.Function){
//get next non number/char value
int ptr=i;
while((raw[ptr]>=48 && raw[ptr]<58) || raw[ptr]==32){
ptr++;
}
if(raw[ptr]=='['){
pdfKeyType=PdfDictionary.VALUE_IS_KEY_ARRAY;
}
}
//allow for other values in D,N,R definitions
if(pdfKeyType==-1 && id== PdfDictionary.ClassMap){
pdfKeyType = Dictionary.getPairedValues(pdfObject, i, raw, pdfKeyType, length, keyLength, keyStart);
}else
//allow for other values in D,N,R definitions as key pairs
if(((((id==PdfDictionary.N || id==PdfDictionary.D || id==PdfDictionary.R))) &&
pdfObject.getParentID()==PdfDictionary.AP &&
pdfObject.getObjectType()==PdfDictionary.Form
&& raw[i]!='[' )){
//get next non number/char value
int ptr=i;
while((raw[ptr]>=48 && raw[ptr]<58) || raw[ptr]==32){
ptr++;
}
//decide if pair
if(raw[keyStart]=='L' && raw[keyStart+1]=='e' && raw[keyStart+2]=='n' && raw[keyStart+3]=='g' && raw[keyStart+4]=='t' && raw[keyStart+5]=='h'){
}else if(raw[keyStart]=='O' && raw[keyStart+1]=='n'){
}else if(raw[keyStart]=='O' && raw[keyStart+1]=='f' && raw[keyStart+2]=='f'){
}else
if(raw[ptr]=='R'){
pdfKeyType = Dictionary.getPairedValues(pdfObject, i, raw, pdfKeyType, length, keyLength, keyStart);
if(debugFastCode) {
System.out.println("new Returns " + pdfKeyType + " i=" + i);
}
}
}
/**/
//DecodeParms can be an array as well as a dictionary so check next char and alter if so
if(PDFkeyInt==PdfDictionary.DecodeParms) {
pdfKeyType = setTypeForDecodeParams(i, raw, length, pdfKeyType);
}
if(debugFastCode && pdfKeyType==-1 && pdfObject.getObjectType()!=PdfDictionary.Page){
System.out.println(id+" "+type);
System.out.println(padding +PDFkey+" NO type setting for "+PdfDictionary.getKey(keyStart,keyLength,raw)+" id="+i);
}
}
private int setValue(final PdfObject pdfObject,int i, final byte[] raw, final int length, final boolean map) {
//if we only need top level do not read whole tree
final boolean ignoreRecursion=pdfObject.ignoreRecursion();
if(debugFastCode) {
System.out.println(padding + pdfObject.getObjectRefAsString() + " =================Reading value for key=" + PDFkey + " (" + PDFkeyInt + ") type=" + PdfDictionary.showAsConstant(pdfKeyType) + " ignorRecursion=" + ignoreRecursion + ' ' + pdfObject);
}
//resolve now in this case as we need to ensure all parts present
if(pdfKeyType==PdfDictionary.VALUE_IS_UNREAD_DICTIONARY && pdfObject.isDataExternal()) {
pdfKeyType = PdfDictionary.VALUE_IS_DICTIONARY;
}
switch(pdfKeyType){
//read text stream (this is text) and also special case of [] in W in CID Fonts
case PdfDictionary.VALUE_IS_TEXTSTREAM:{
i = TextStream.setTextStreamValue(pdfObject, i, raw, ignoreRecursion,PDFkeyInt, objectReader);
break;
}case PdfDictionary.VALUE_IS_NAMETREE:{
i = Name.setNameTreeValue(pdfObject, i, raw, length, ignoreRecursion,PDFkeyInt,objectReader);
break;
//readDictionary keys << /A 12 0 R /B 13 0 R >>
}case PdfDictionary.VALUE_IS_DICTIONARY_PAIRS:{
i = Dictionary.setDictionaryValue(pdfObject, i, raw, length, ignoreRecursion,objectReader,PDFkeyInt);
break;
//Strings
}case PdfDictionary.VALUE_IS_STRING_ARRAY:{
final Array objDecoder=new Array(objectReader,i, endPt, PdfDictionary.VALUE_IS_STRING_ARRAY);
i=objDecoder.readArray(ignoreRecursion, raw, pdfObject, PDFkeyInt);
break;
//read Object Refs in [] (may be indirect ref)
}case PdfDictionary.VALUE_IS_BOOLEAN_ARRAY:{
final Array objDecoder=new Array(objectReader, i, endPt, PdfDictionary.VALUE_IS_BOOLEAN_ARRAY);
i=objDecoder.readArray(false, raw, pdfObject, PDFkeyInt);
break;
//read Object Refs in [] (may be indirect ref)
}case PdfDictionary.VALUE_IS_KEY_ARRAY:{
final Array objDecoder=new Array(objectReader, i, endPt, PdfDictionary.VALUE_IS_KEY_ARRAY);
i=objDecoder.readArray(ignoreRecursion, raw, pdfObject, PDFkeyInt);
break;
//read numbers in [] (may be indirect ref)
}case PdfDictionary.VALUE_IS_MIXED_ARRAY:{
final Array objDecoder=new Array(objectReader, i, endPt, PdfDictionary.VALUE_IS_MIXED_ARRAY);
i=objDecoder.readArray(ignoreRecursion, raw, pdfObject, PDFkeyInt);
break;
//read numbers in [] (may be indirect ref) same as Mixed but allow for recursion and store as objects
}case PdfDictionary.VALUE_IS_OBJECT_ARRAY:{
final Array objDecoder=new Array(objectReader, i, endPt, PdfDictionary.VALUE_IS_OBJECT_ARRAY);
i=objDecoder.readArray(false, raw, pdfObject, PDFkeyInt);
break;
//read numbers in [] (may be indirect ref)
}case PdfDictionary.VALUE_IS_DOUBLE_ARRAY:{
final Array objDecoder=new Array(objectReader, i, endPt, PdfDictionary.VALUE_IS_DOUBLE_ARRAY);
i=objDecoder.readArray(false, raw, pdfObject,PDFkeyInt);
break;
//read numbers in [] (may be indirect ref)
}case PdfDictionary.VALUE_IS_INT_ARRAY:{
final Array objDecoder=new Array(objectReader, i, endPt, PdfDictionary.VALUE_IS_INT_ARRAY);
i=objDecoder.readArray(false, raw, pdfObject, PDFkeyInt);
break;
//read numbers in [] (may be indirect ref)
}case PdfDictionary.VALUE_IS_FLOAT_ARRAY:{
final Array objDecoder=new Array(objectReader, i, endPt, PdfDictionary.VALUE_IS_FLOAT_ARRAY);
i=objDecoder.readArray(false, raw, pdfObject, PDFkeyInt);
break;
//read String (may be indirect ref)
}case PdfDictionary.VALUE_IS_NAME:{
i = Name.setNameStringValue(pdfObject, i, raw, map,PDFkey, PDFkeyInt, objectReader);
break;
//read true or false
}case PdfDictionary.VALUE_IS_BOOLEAN:{
i = BooleanValue.set(pdfObject, i, raw, PDFkeyInt);
break;
//read known set of values
}case PdfDictionary.VALUE_IS_STRING_CONSTANT:{
i = StringValue.setStringConstantValue(pdfObject, i, raw,PDFkeyInt);
break;
//read known set of values
}case PdfDictionary.VALUE_IS_STRING_KEY:{
i = StringValue.setStringKeyValue(pdfObject, i, raw,PDFkeyInt);
break;
//read number (may be indirect ref)
}case PdfDictionary.VALUE_IS_INT:{
//roll on
i++;
//move cursor to start of text
while(raw[i]==10 || raw[i]==13 || raw[i]==32 || raw[i]==47) {
i++;
}
i = NumberValue.setNumberValue(pdfObject, i, raw, PDFkeyInt,objectReader);
break;
//read float number (may be indirect ref)
}case PdfDictionary.VALUE_IS_FLOAT:{
i = FloatValue.setFloatValue(pdfObject, i, raw, length,PDFkeyInt,objectReader);
break;
//read known Dictionary object which may be direct or indirect
}case PdfDictionary.VALUE_IS_UNREAD_DICTIONARY:{
i = setUnreadDictionaryValue(pdfObject, i, raw);
break;
}case PdfDictionary.VALUE_IS_VARIOUS:{
if(raw.length-5>0 && raw[i+1]=='n' && raw[i+2]=='u' && raw[i+3]=='l' && raw[i+4]=='l'){ //ignore null value and skip (ie /N null)
i += 5;
}else{
i = setVariousValue(pdfObject, i, raw, length, PDFkeyInt, map, ignoreRecursion,objectReader);
}
break;
}case PdfDictionary.VALUE_IS_DICTIONARY:{
i = setDictionaryValue(pdfObject, i, raw, ignoreRecursion);
break;
}
}
return i;
}
static int stripComment(final int length, int i, final byte[] raw) {
while(i='0' && raw[ii]<='9')) {
pdfKeyType = PdfDictionary.VALUE_IS_OBJECT_ARRAY;
}
}
return pdfKeyType;
}
private int setDictionaryValue(final PdfObject pdfObject,int i, final byte[] raw, final boolean ignoreRecursion) {
/**
* workout actual end as not always returned right
*/
int end=i;
int nextC=i;
//ignore any gaps
while(raw[nextC]==10 || raw[nextC]==32 || raw[nextC]==9) {
nextC++;
}
//allow for null object
if(raw[nextC]=='n' && raw[nextC+1]=='u' && raw[nextC+2]=='l' && raw[nextC+3]=='l'){
i=nextC+4;
return i;
}else if(raw[nextC]=='[' && raw[nextC+1]==']'){ //allow for empty object []
i=nextC;
return i;
}
if(raw[i]!='<' && raw[i+1]!='<') {
end += 2;
}
boolean inDictionary=true;
final boolean isKey=raw[end-1]=='/';
while(inDictionary){
if(raw[end]=='<'&& raw[end+1]=='<'){
int level2=1;
end++;
while(level2>0){
if(raw[end]=='<'&& raw[end+1]=='<'){
level2++;
end += 2;
}else if(raw[end-1]=='>'&& raw[end]=='>'){
level2--;
if(level2>0) {
end += 2;
}
}else if(raw[end]=='('){ //scan (strings) as can contain >>
end++;
while(raw[end]!=')' || ObjectUtils.isEscaped(raw, end)) {
end++;
}
}else {
end++;
}
}
inDictionary=false;
}else if(raw[end]=='R' ){
inDictionary=false;
}else if(isKey && (raw[end]==' ' || raw[end]==13 || raw[end]==10 || raw[end]==9)){
inDictionary=false;
}else if(raw[end]=='/'){
inDictionary=false;
end--;
}else if(raw[end]=='>' && raw[end+1]=='>'){
inDictionary=false;
end--;
}else {
end++;
}
}
//boolean save=debugFastCode;
Dictionary.readDictionary(pdfObject,i, raw, PDFkeyInt, ignoreRecursion, objectReader, isInlineImage);
//use correct value
return end;
}
private int setUnreadDictionaryValue(final PdfObject pdfObject, int i, final byte[] raw) {
if(raw[i]!='<') //roll on
{
i++;
}
while(raw[i]==10 || raw[i]==13 || raw[i]==32 || raw[i]==9) //move cursor to start of text
{
i++;
}
final int start=i;
final int keyStart;
int keyLength;
//create and store stub
final PdfObject valueObj= ObjectFactory.createObject(PDFkeyInt,pdfObject.getObjectRefAsString(), pdfObject.getObjectType(), pdfObject.getID());
valueObj.setID(PDFkeyInt);
if(raw[i]=='n' && raw[i+1]=='u' && raw[i+2]=='l' && raw[i+3]=='l'){ //allow for null
}else {
pdfObject.setDictionary(PDFkeyInt, valueObj);
}
int status=PdfObject.UNDECODED_DIRECT; //assume not object and reset below if wrong
//some objects can have a common value (ie /ToUnicode /Identity-H
if(raw[i]==47){ //not worth caching
//move cursor to start of text
while(raw[i]==10 || raw[i]==13 || raw[i]==32 || raw[i]==47 || raw[i]==60) {
i++;
}
keyStart=i;
keyLength=0;
//move cursor to end of text
while(raw[i]!=10 && raw[i]!=13 && raw[i]!=32 && raw[i]!=47 && raw[i]!=60 && raw[i]!=62){
i++;
keyLength++;
}
i--;// move back so loop works
//store value
final int constant=valueObj.setConstant(PDFkeyInt,keyStart,keyLength,raw);
if(constant== PdfDictionary.Unknown || isInlineImage){
final byte[] newStr=new byte[keyLength];
System.arraycopy(raw, keyStart, newStr, 0, keyLength);
final String s=new String(newStr);
valueObj.setGeneralStringValue(s);
}
status=PdfObject.DECODED;
}else //allow for empty object
if(raw[i]=='e' && raw[i+1]=='n' && raw[i+2]=='d' && raw[i+3]=='o' && raw[i+4]=='b' ){
}else{ //we need to ref from ref elsewhere which may be indirect [ref], hence loop
//roll onto first valid char
while((raw[i]==91 && PDFkeyInt!=PdfDictionary.ColorSpace) || raw[i]==32 || raw[i]==13 || raw[i]==10){
i++;
}
//roll on and ignore
if(raw[i]=='<' && raw[i+1]=='<'){
i += 2;
int reflevel=1;
while(reflevel>0){
if(raw[i]=='<' && raw[i+1]=='<'){
i += 2;
reflevel++;
}else if(raw[i]=='(' ){ //allow for << (>>) >>
i++;
while(raw[i]!=')' || ObjectUtils.isEscaped(raw, i)) {
i++;
}
}else if(raw[i]=='>' && i+1==raw.length){
reflevel=0;
}else if(raw[i]=='>' && raw[i+1]=='>'){
i += 2;
reflevel--;
}else {
i++;
}
}
}else if(raw[i]=='['){
i++;
int reflevel=1;
while(reflevel>0){
if(raw[i]=='(' ){ //allow for [[ in stream ie [/Indexed /DeviceRGB 255 (abc[[z
i++;
while(raw[i]!=')' || ObjectUtils.isEscaped(raw, i)) {
i++;
}
}else if(raw[i]=='[' ){
reflevel++;
}else if(raw[i]==']'){
reflevel--;
}
i++;
}
i--;
}else if(raw[i]=='n' && raw[i+1]=='u' && raw[i+2]=='l' && raw[i+3]=='l'){ //allow for null
i += 4;
}else{ //must be a ref
//assume not object and reset below if wrong
status=PdfObject.UNDECODED_REF;
while(raw[i]!='R' || raw[i-1]=='e') { //second condition to stop spurious match on DeviceRGB
i++;
if(i==raw.length) {
break;
}
}
i++;
if(i>=raw.length) {
i = raw.length - 1;
}
}
}
valueObj.setStatus(status);
if(status!=PdfObject.DECODED){
final int StrLength=i-start;
final byte[] unresolvedData=new byte[StrLength];
System.arraycopy(raw, start, unresolvedData, 0, StrLength);
//check for returns in data if ends with R and correct to space
if(unresolvedData[StrLength-1]==82){
for(int jj=0;jj') //move back so loop works
{
i--;
}
return i;
}
public static int handleValue(final PdfObject pdfObject, int i, final int PDFkeyInt, int j, final int ref, final int generation, final byte[] data, final PdfFileReader objectReader) {
final int keyStart;
int keyLength;
final int dataLen=data.length;
if (data[j] == 47) {
j++; //roll on past /
keyStart = j;
keyLength = 0;
//move cursor to end of text
while (j='0' && raw[jj]<='9'){
ptr=jj;
jj=len;
}
}
//check first non-number is R
int end=ptr;
while((raw[end]>='0' && raw[end]<='9') || raw[end]==' ' || raw[end]==10 || raw[end]==13 || raw[end]==9) {
end++;
}
//and store if it is a ref
if(raw[end]=='R') {
pdfObject.setRef(new String(raw, ptr, len - ptr));
}
}else if(raw[raw.length-1]=='R'){
objectRef=new String(raw);
pdfObject.setRef(objectRef);
}
Dictionary.readDictionaryFromRefOrDirect(-1,pdfObject,objectRef, 0, raw , -1,objectReader);
}
}
}
/**
* set end if not end of data stream
*/
public void setEndPt(final int dataPointer) {
this.endPt=dataPointer;
}
}
© 2015 - 2025 Weber Informatics LLC | Privacy Policy