org.jpedal.parser.text.HTMLTextUtils Maven / Gradle / Ivy

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/*
 * ===========================================
 * 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


 *
 * ---------------
 * HTMLTextUtils.java
 * ---------------
 */

package org.jpedal.parser.text;

import org.jpedal.fonts.PdfFont;
import org.jpedal.fonts.StandardFonts;

/**
 *
 * @author markee
 */
class HTMLTextUtils {
    
    static boolean remapGlyph(PdfFont currentFontData, GlyphData glyphData){
        
        boolean alreadyRemaped=false;
        
        final String charGlyph= currentFontData.getMappedChar(glyphData.getRawInt(), false);
        
        if(charGlyph!=null){
            final int newRawInt=currentFontData.getDiffChar(charGlyph);
            
            if(newRawInt!=-1){
                glyphData.setRawInt(newRawInt); //only reassign if not -1 as messes up code further down
                glyphData.setDisplayValue(String.valueOf((char)newRawInt));
                
                //fix for PDFdata/sample_pdfs_html/general-July2012/klar--men-aldri-ferdig_dacecc.pdf
                //in some examples the unicode table is wrong and maps the character into this odd range, but the glyph is always correct
                //this is a sanity check to fix this mapping issue
            }else if(!glyphData.getDisplayValue().isEmpty() && glyphData.getDisplayValue().charAt(0)<32){
                
                final int altValue=StandardFonts.getAdobeMap(charGlyph);
                
                //this test can return -1 for invalid value as in sample_pdfs_html/general-May2014/18147.pdf
                //which breaks code further down so we reject this value
                if(altValue>-1) {
                    glyphData.setRawInt(altValue);
                    glyphData.set(String.valueOf((char) altValue));
                    alreadyRemaped = true;
                }
            }
        }
        
        return alreadyRemaped;
    }
}