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An Open Source JavaFX PDF Viewer
/*
* ===========================================
* Java Pdf Extraction Decoding Access Library
* ===========================================
*
* Project Info: http://www.idrsolutions.com
* Help section for developers at http://www.idrsolutions.com/support/
*
* (C) Copyright 1997-2017 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
*
* ---------------
* UnicodeReader.java
* ---------------
*/
package org.jpedal.fonts;
import org.jpedal.utils.LogWriter;
class UnicodeReader {
private static final int[] powers={1,16,256,256*16};
int dataLen;
final byte[] data;
boolean hasDoubleBytes;
UnicodeReader(final byte[] data){
this.data=data;
if(data!=null){
dataLen=data.length;
}
}
/**
* read unicode translation table
*/
public String[] readUnicode(){
if(data==null) {
return null;
}
int defType = 0;
int ptr=0;
//initialise unicode holder
final String[] unicodeMappings = new String[65536];
boolean inDef=false;
//get stream of data
try {
//read values into lookup table
while (true) {
while(ptr=dataLen) {
break;
} else if(ptr+4=dataLen){
break;
}else if(data[ptr]=='b' && data[ptr+1]=='e' && data[ptr+2]=='g' && data[ptr+3]=='i' && data[ptr+4]=='n' &&
data[ptr+5]=='b' && data[ptr+6]=='f'){
if(data[ptr+7]=='c' && data[ptr+8]=='h' && data[ptr+9]=='a' && data[ptr+10]=='r'){
defType = 1;
ptr += 10;
inDef=true;
}else if(data[ptr+7]=='r' && data[ptr+8]=='a' && data[ptr+9]=='n' && data[ptr+10]=='g' && data[ptr+11]=='e'){
defType = 2;
ptr += 11;
inDef=true;
}
}
ptr++;
}
} catch (final Exception e) {
LogWriter.writeLog("Exception setting up text object " + e);
}
return unicodeMappings;
}
private int readLineValue(final String[] unicodeMappings,int type, int ptr) {
int entryCount= type +1;
//read 2 values
final int[][] value=new int[2000][4];
boolean isMultipleValues=false;
for(int vals=0;vals0){
final int nextVal = getNextVal(ptr, count);
value[vals][byteAccessed] = nextVal;
byteAccessed++;
count -= 4;
}
}
//roll to end end so works
while(ptr4){
count=4;
disp=4;
}
int raw;
int pos=0;
int nextVal=0;
for(int jj=0;jj='A' && raw<='F'){
raw -= 55;
}else if(raw>='a' && raw<='f'){
raw -= 87;
}else if(raw>='0' && raw<='9'){
raw -= 48;
}else {
throw new RuntimeException("Unexpected number "+(char)raw);
}
nextVal += (raw*powers[pos]);
pos++;
}
return nextVal;
}
private void fillValues(final String[] unicodeMappings, final int entryCount, final int[][] value, final int type) {
int val;
switch(type){
case 1: //single value mapping onto 1 or more values
if(value[0][0]>255) {
hasDoubleBytes=true;
}
final char[] str=new char[entryCount-1];
for(int aa=0;aa255) {
hasDoubleBytes=true;
}
final int disp=i-value[0][0];
val=value[2][0] + disp;
if(val>0){ //ignore 0 to fix issue in Dalim files
if(unicodeMappings[i]==null) {
unicodeMappings[i]= String.valueOf((char) val);
}else{
unicodeMappings[i] += String.valueOf((char) val);
}
}
}
break;
case 4: //corner case
int j=2;
for (int i = value[0][0]; i < value[1][0] + 1; i++){
if(i>255) {
hasDoubleBytes=true;
}
if(value[0][0]==value[1][0]){ //allow for <02> <02> [<0066006C>]
setValue( i, 2, value, unicodeMappings,0);
}else{ //read next value
setValue(i, j,value, unicodeMappings,0);
}
j++;
}
break;
}
}
static void setValue(final int i, final int j, final int[][] value, final String[] unicodeMappings, final int offset) {
int val;
for(int jj=0;jj<4;jj++) {
val=value[j][jj]+offset;
if (val > 0) {
if(unicodeMappings[i]==null) {
unicodeMappings[i]= String.valueOf((char) val);
}else{
unicodeMappings[i] += String.valueOf((char) val);
}
}
}
}
public boolean hasDoubleByteValues(){
return hasDoubleBytes;
}
}