iText 5 itextpdf.jar Source Code

itextpdf.jar is a component in iText 5 Java library to provide core functionalities. iText Java library allows you to generate and manage PDF documents.

The Source Code files are provided at iText GitHub site.

You can compile it to generate your JAR file, using pom.xml as the build configuration file.

The source code of itextpdf-5.5.14.jar is provided below:

✍: FYIcenter.com

com/itextpdf/text/pdf/FontDetails.java

/*
 *
 * This file is part of the iText (R) project.
    Copyright (c) 1998-2020 iText Group NV
 * Authors: Bruno Lowagie, Paulo Soares, et al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
 * ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
 * OF THIRD PARTY RIGHTS
 *
 * This program 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 Affero General Public License for more details.
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
 * http://itextpdf.com/terms-of-use/
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License,
 * a covered work must retain the producer line in every PDF that is created
 * or manipulated using iText.
 *
 * You can be released from the requirements of the license by purchasing
 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial activities involving the iText software without
 * disclosing the source code of your own applications.
 * These activities include: offering paid services to customers as an ASP,
 * serving PDFs on the fly in a web application, shipping iText with a closed
 * source product.
 *
 * For more information, please contact iText Software Corp. at this
 * address: sales@itextpdf.com
 */
package com.itextpdf.text.pdf;

import com.itextpdf.text.ExceptionConverter;
import com.itextpdf.text.Utilities;
import com.itextpdf.text.pdf.fonts.otf.Language;
import com.itextpdf.text.pdf.languages.BanglaGlyphRepositioner;
import com.itextpdf.text.pdf.languages.GlyphRepositioner;
import com.itextpdf.text.pdf.languages.IndicCompositeCharacterComparator;

import java.io.UnsupportedEncodingException;
import java.util.*;

/**
 * Each font in the document will have an instance of this class
 * where the characters used will be represented.
 *
 * @author  Paulo Soares
 */
class FontDetails {

    /**
     * The indirect reference to this font
     */
    PdfIndirectReference indirectReference;
    /**
     * The font name that appears in the document body stream
     */
    PdfName fontName;
    /**
     * The font
     */
    BaseFont baseFont;
    /**
     * The font if it's an instance of <CODE>TrueTypeFontUnicode</CODE>
     */
    TrueTypeFontUnicode ttu;
    /**
     * The font if it's an instance of <CODE>CJKFont</CODE>
     */
    CJKFont cjkFont;
    /**
     * The array used with single byte encodings
     */
    byte shortTag[];
    /**
     * The map used with double byte encodings. The key is Integer(glyph) and
     * the value is int[]{glyph, width, Unicode code}
     */
    HashMap<Integer, int[]> longTag;
    /**
     * IntHashtable with CIDs of CJK glyphs that are used in the text.
     */
    IntHashtable cjkTag;
    /**
     * The font type
     */
    int fontType;
    /**
     * <CODE>true</CODE> if the font is symbolic
     */
    boolean symbolic;
    /**
     * Indicates if only a subset of the glyphs and widths for that particular
     * encoding should be included in the document.
     */
    protected boolean subset = true;

    /**
     * Each font used in a document has an instance of this class.
     * This class stores the characters used in the document and other
     * specifics unique to the current working document.
     * @param fontName the font name
     * @param indirectReference the indirect reference to the font
     * @param baseFont the <CODE>BaseFont</CODE>
     */
    FontDetails(PdfName fontName, PdfIndirectReference indirectReference, BaseFont baseFont) {
        this.fontName = fontName;
        this.indirectReference = indirectReference;
        this.baseFont = baseFont;
        fontType = baseFont.getFontType();
        switch (fontType) {
            case BaseFont.FONT_TYPE_T1:
            case BaseFont.FONT_TYPE_TT:
                shortTag = new byte[256];
                break;
            case BaseFont.FONT_TYPE_CJK:
                cjkTag = new IntHashtable();
                cjkFont = (CJKFont)baseFont;
                break;
            case BaseFont.FONT_TYPE_TTUNI:
                longTag = new HashMap<Integer, int[]>();
                ttu = (TrueTypeFontUnicode)baseFont;
                symbolic = baseFont.isFontSpecific();
                break;
        }
    }

    /**
     * Gets the indirect reference to this font.
     * @return the indirect reference to this font
     */
    PdfIndirectReference getIndirectReference() {
        return indirectReference;
    }

    /**
     * Gets the font name as it appears in the document body.
     * @return the font name
     */
    PdfName getFontName() {
        return fontName;
    }

    /**
     * Gets the <CODE>BaseFont</CODE> of this font.
     * @return the <CODE>BaseFont</CODE> of this font
     */
    BaseFont getBaseFont() {
        return baseFont;
    }

    Object[] convertToBytesGid(String gids) {
        if (fontType != BaseFont.FONT_TYPE_TTUNI)
            throw new IllegalArgumentException("GID require TT Unicode");
        try {
            StringBuilder sb = new StringBuilder();
            int totalWidth = 0;
            for (char gid : gids.toCharArray()) {
                int width = ttu.getGlyphWidth(gid);
                totalWidth += width;
                int vchar = ttu.GetCharFromGlyphId(gid);
                if (vchar != 0) {
                    sb.append(Utilities.convertFromUtf32(vchar));
                }
                Integer gl = Integer.valueOf(gid);
                if (!longTag.containsKey(gl))
                    longTag.put(gl, new int[]{gid, width, vchar});
            }
            return new Object[]{gids.getBytes(CJKFont.CJK_ENCODING), sb.toString(), Integer.valueOf(totalWidth)};
        }
        catch (Exception e) {
            throw new ExceptionConverter(e);
        }
    }
    
    /**
     * Converts the text into bytes to be placed in the document.
     * The conversion is done according to the font and the encoding and the characters
     * used are stored.
     * @param text the text to convert
     * @return the conversion
     */
    byte[] convertToBytes(String text) {
        byte b[] = null;
        switch (fontType) {
            case BaseFont.FONT_TYPE_T3:
                return baseFont.convertToBytes(text);
            case BaseFont.FONT_TYPE_T1:
            case BaseFont.FONT_TYPE_TT: {
                b = baseFont.convertToBytes(text);
                int len = b.length;
                for (int k = 0; k < len; ++k)
                    shortTag[b[k] & 0xff] = 1;
                break;
            }
            case BaseFont.FONT_TYPE_CJK: {
                int len = text.length();
                if (cjkFont.isIdentity()) {
                    for (int k = 0; k < len; ++k) {
                        cjkTag.put(text.charAt(k), 0);
                    }
                }
                else {
                    for (int k = 0; k < len; ++k) {
                        int val;
                        if (Utilities.isSurrogatePair(text, k)) {
                            val = Utilities.convertToUtf32(text, k);
                            k++;
                        }
                        else {
                            val = text.charAt(k);
                        }
                        cjkTag.put(cjkFont.getCidCode(val), 0);
                    }
                }
                b = cjkFont.convertToBytes(text);
                break;
            }
            case BaseFont.FONT_TYPE_DOCUMENT: {
                b = baseFont.convertToBytes(text);
                break;
            }
            case BaseFont.FONT_TYPE_TTUNI: {
                try {
                    int len = text.length();
                    int metrics[] = null;
                    char glyph[] = new char[len];
                    int i = 0;
                    if (symbolic) {
                        b = PdfEncodings.convertToBytes(text, "symboltt");
                        len = b.length;
                        for (int k = 0; k < len; ++k) {
                            metrics = ttu.getMetricsTT(b[k] & 0xff);
                            if (metrics == null)
                                continue;
                            longTag.put(Integer.valueOf(metrics[0]), new int[]{metrics[0], metrics[1], ttu.getUnicodeDifferences(b[k] & 0xff)});
                            glyph[i++] = (char)metrics[0];
                        }
                    } else if (canApplyGlyphSubstitution()) {
                    	return convertToBytesAfterGlyphSubstitution(text);
                    } else {
                    	for (int k = 0; k < len; ++k) {
                    		int val;
                    		if (Utilities.isSurrogatePair(text, k)) {
                    			val = Utilities.convertToUtf32(text, k);
                    			k++;
                    		}
                    		else {
                    			val = text.charAt(k);
                    		}
                    		metrics = ttu.getMetricsTT(val);
                    		if (metrics == null)
                    			continue;
                    		int m0 = metrics[0];
                    		Integer gl = Integer.valueOf(m0);
                    		if (!longTag.containsKey(gl))
                    			longTag.put(gl, new int[]{m0, metrics[1], val});
                    		glyph[i++] = (char)m0;
                    	}
                    }
                    glyph = Utilities.copyOfRange(glyph, 0, i);
                    b = StringUtils.convertCharsToBytes(glyph);
                }
                catch (UnsupportedEncodingException e) {
                    throw new ExceptionConverter(e);
                }
                break;
            }
        }
        return b;
    }
    
    private boolean canApplyGlyphSubstitution() {
    	return (fontType == BaseFont.FONT_TYPE_TTUNI) && (ttu.getGlyphSubstitutionMap() != null);
    }
    
    private byte[] convertToBytesAfterGlyphSubstitution(final String text) throws UnsupportedEncodingException { 
    	
    	if (!canApplyGlyphSubstitution()) {
    		throw new IllegalArgumentException("Make sure the font type if TTF Unicode and a valid GlyphSubstitutionTable exists!"); 
    	}
    	
    	 Map<String, Glyph> glyphSubstitutionMap = ttu.getGlyphSubstitutionMap();
    	
        // generate a regex from the characters to be substituted
        
        // for Indic languages: push back the CompositeCharacters with smaller length
        Set<String> compositeCharacters = new TreeSet<String>(new IndicCompositeCharacterComparator());
        compositeCharacters.addAll(glyphSubstitutionMap.keySet());
        
        // convert the text to a list of Glyph, also take care of the substitution
        ArrayBasedStringTokenizer tokenizer = new ArrayBasedStringTokenizer(compositeCharacters.toArray(new String[0]));
        String[] tokens = tokenizer.tokenize(text);
        
        List<Glyph> glyphList = new ArrayList<Glyph>(50);
        
        for (String token : tokens) {
            
            // first check whether this is in the substitution map
            Glyph subsGlyph = glyphSubstitutionMap.get(token);
            
            if (subsGlyph != null) {
                glyphList.add(subsGlyph);
            } else {
                // break up the string into individual characters
                for (char c : token.toCharArray()) {
                    int[] metrics = ttu.getMetricsTT(c);
                    int glyphCode = metrics[0];
                    int glyphWidth = metrics[1];
                    glyphList.add(new Glyph(glyphCode, glyphWidth, String.valueOf(c))); 
                }
            }
            
        }
        
        GlyphRepositioner glyphRepositioner = getGlyphRepositioner();
        
        if (glyphRepositioner != null) {
        	glyphRepositioner.repositionGlyphs(glyphList);
        }
        
        char[] charEncodedGlyphCodes = new char[glyphList.size()];
        
        // process each Glyph thus obtained
        for (int i = 0; i < glyphList.size(); i++) {
            Glyph glyph = glyphList.get(i); 
            charEncodedGlyphCodes[i] = (char) glyph.code;
            Integer glyphCode = Integer.valueOf(glyph.code);
            
            if (!longTag.containsKey(glyphCode)) {
                // FIXME: this is buggy as the 3rd arg. should be a String as a Glyph can represent more than 1 char
                longTag.put(glyphCode, new int[]{glyph.code,  glyph.width, glyph.chars.charAt(0)}); 
            }
        }
        
        return new String(charEncodedGlyphCodes).getBytes(CJKFont.CJK_ENCODING);
    }
    
    private GlyphRepositioner getGlyphRepositioner() {
    	Language language = ttu.getSupportedLanguage();
    	
    	if (language == null) {
    		throw new IllegalArgumentException("The supported language field cannot be null in " + ttu.getClass().getName()); 
    	}
    	
    	switch (language) {
		case BENGALI:
			return new BanglaGlyphRepositioner(Collections.unmodifiableMap(ttu.cmap31), ttu.getGlyphSubstitutionMap());
		default:
			return null;
		}
    }
    
    /**
     * Writes the font definition to the document.
     * @param writer the <CODE>PdfWriter</CODE> of this document
     */
    public void writeFont(PdfWriter writer) {
        try {
            switch (fontType) {
                case BaseFont.FONT_TYPE_T3:
                    baseFont.writeFont(writer, indirectReference, null);
                    break;
                case BaseFont.FONT_TYPE_T1:
                case BaseFont.FONT_TYPE_TT: {
                    int firstChar;
                    int lastChar;
                    for (firstChar = 0; firstChar < 256; ++firstChar) {
                        if (shortTag[firstChar] != 0)
                            break;
                    }
                    for (lastChar = 255; lastChar >= firstChar; --lastChar) {
                        if (shortTag[lastChar] != 0)
                            break;
                    }
                    if (firstChar > 255) {
                        firstChar = 255;
                        lastChar = 255;
                    }
                    baseFont.writeFont(writer, indirectReference, new Object[]{Integer.valueOf(firstChar), Integer.valueOf(lastChar), shortTag, Boolean.valueOf(subset)});
                    break;
                }
                case BaseFont.FONT_TYPE_CJK:
                    baseFont.writeFont(writer, indirectReference, new Object[]{cjkTag});
                    break;
                case BaseFont.FONT_TYPE_TTUNI:
                    baseFont.writeFont(writer, indirectReference, new Object[]{longTag, Boolean.valueOf(subset)});
                    break;
            }
        }
        catch(Exception e) {
            throw new ExceptionConverter(e);
        }
    }
    
    /**
     * Indicates if all the glyphs and widths for that particular
     * encoding should be included in the document.
     * @return <CODE>false</CODE> to include all the glyphs and widths.
     */
    public boolean isSubset() {
        return subset;
    }

    /**
     * Indicates if all the glyphs and widths for that particular
     * encoding should be included in the document. Set to <CODE>false</CODE>
     * to include all.
     * @param subset new value of property subset
     */
    public void setSubset(boolean subset) {
        this.subset = subset;
    }
   
}

com/itextpdf/text/pdf/FontDetails.java

 

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