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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
*
* ---------------
* EscapedTextUtils.java
* ---------------
*/
package org.jpedal.parser.text;
import org.jpedal.fonts.PdfFont;
import org.jpedal.fonts.StandardFonts;
import org.jpedal.parser.ParserOptions;
import org.jpedal.render.DynamicVectorRenderer;
/**
*
* @author markee
*/
class EscapedTextUtils {
static int getEscapedValue(int i, final byte[] stream, final GlyphData glyphData, final PdfFont currentFontData,
final int streamLength, final ParserOptions parserOptions, final DynamicVectorRenderer current) {
// any escape chars '\\'=92
i++;
glyphData.setLastChar(glyphData.getRawChar());//update last char as escape
if ((streamLength > (i + 2)) && (Character.isDigit((char) stream[i]))) {
//see how long number is
int numberCount = 1;
if (Character.isDigit((char) stream[i + 1])) {
numberCount++;
if (Character.isDigit((char) stream[i + 2])) {
numberCount++;
}
}
// convert octal escapes
int rawInt = TD.readEscapeValue(i, numberCount, 8, stream);
i = i + numberCount - 1;
if (rawInt > 255) {
rawInt -= 256;
}
glyphData.setRawChar((char) rawInt); //set to dummy value as may be / value
glyphData.setRawInt(rawInt);
glyphData.setDisplayValue(currentFontData.getGlyphValue(rawInt));
if (parserOptions.isTextExtracted()) {
glyphData.setUnicodeValue(currentFontData.getUnicodeValue(glyphData.getDisplayValue(), rawInt));
}
//allow for \134 (ie \\)
if (glyphData.getRawChar() == 92) // '\\'=92
{
glyphData.setRawChar((char)120);
}
} else {
int rawInt = stream[i] & 255;
glyphData.setRawChar((char) rawInt);
if (glyphData.getRawChar() == 'u') { //convert unicode of format uxxxx to char value
rawInt = TD.readEscapeValue(i + 1, 4, 16, stream);
i += 4;
//rawChar = (char) glyphData.rawInt;
glyphData.setDisplayValue(currentFontData.getGlyphValue(rawInt));
if(parserOptions.isTextExtracted()) {
glyphData.setUnicodeValue(currentFontData.getUnicodeValue(glyphData.getDisplayValue(), rawInt));
}
} else {
final char testChar=glyphData.getRawChar();
switch (testChar) {
case 'n':
rawInt='\n';
glyphData.setRawChar('\n');
break;
case 'b':
rawInt='\b';
glyphData.setRawChar('\b');
break;
case 't':
rawInt='\t';
glyphData.setRawChar('\t');
break;
case 'r':
rawInt='\r';
glyphData.setRawChar('\r');
break;
case 'f':
rawInt='\f';
glyphData.setRawChar('\f');
break;
default:
break;
}
glyphData.setDisplayValue(currentFontData.getGlyphValue(rawInt));
if (parserOptions.isTextExtracted()) {
glyphData.setUnicodeValue(currentFontData.getUnicodeValue(glyphData.getDisplayValue(),rawInt));
}
if (!glyphData.getDisplayValue().isEmpty()){ //set raw char
glyphData.setRawChar(glyphData.getDisplayValue().charAt(0));
}
}
glyphData.setRawInt(rawInt);
}
//fix for character wrong in some T1 fonts
if(currentFontData.getFontType()==StandardFonts.TYPE1 && current.isHTMLorSVG()){
final String possAltValue = currentFontData.getMappedChar(glyphData.getRawInt(),true);
if(possAltValue!=null && possAltValue.length()==1 && possAltValue.equalsIgnoreCase(glyphData.getUnicodeValue().toLowerCase())){
glyphData.set(possAltValue);
}
}
return i;
}
}