com.lowagie.text.pdf.fonts.cmaps.CMap Maven / Gradle / Ivy
/**
* Copyright (c) 2005, www.fontbox.org All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
* following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following
* disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and
* the following disclaimer in the documentation and/or other materials provided with the distribution. 3. Neither the
* name of fontbox; nor the names of its contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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package com.lowagie.text.pdf.fonts.cmaps;
import com.lowagie.text.error_messages.MessageLocalization;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* This class represents a CMap file.
*
* @author Ben Litchfield ([email protected])
* @since 2.1.4
*/
public class CMap {
private List codeSpaceRanges = new ArrayList<>();
private Map singleByteMappings = new HashMap<>();
private Map doubleByteMappings = new HashMap<>();
/**
* Creates a new instance of CMap.
*/
public CMap() {
//default constructor
}
/**
* This will tell if this cmap has any one byte mappings.
*
* @return true If there are any one byte mappings, false otherwise.
*/
public boolean hasOneByteMappings() {
return !singleByteMappings.isEmpty();
}
/**
* This will tell if this cmap has any two byte mappings.
*
* @return true If there are any two byte mappings, false otherwise.
*/
public boolean hasTwoByteMappings() {
return !doubleByteMappings.isEmpty();
}
/**
* This will perform a lookup into the map.
*
* Some characters (e.g. ligatures) decode to character sequences.
*
* @param code The code used to lookup.
* @return The string that matches the lookup.
*/
public String lookup(char code) {
String result = null;
if (hasTwoByteMappings()) {
result = doubleByteMappings.get((int) code);
}
if (result == null && code <= 0xff && hasOneByteMappings()) {
result = singleByteMappings.get(code & 0xff);
}
return result;
}
/**
* This will perform a lookup into the map.
*
* @param code The code used to lookup.
* @param offset The offset into the byte array.
* @param length The length of the data we are getting.
* @return The string that matches the lookup.
*/
public String lookup(byte[] code, int offset, int length) {
String result = null;
Integer key = null;
if (length == 1) {
key = code[offset] & 0xff;
result = singleByteMappings.get(key);
} else if (length == 2) {
int intKey = code[offset] & 0xff;
intKey <<= 8;
intKey += code[offset + 1] & 0xff;
key = intKey;
result = doubleByteMappings.get(key);
}
return result;
}
/**
* This will add a mapping.
*
* @param src The src to the mapping.
* @param dest The dest to the mapping.
* @throws IOException if the src is invalid.
*/
public void addMapping(byte[] src, String dest) throws IOException {
if (src.length == 1) {
singleByteMappings.put(src[0] & 0xff, dest);
} else if (src.length == 2) {
int intSrc = src[0] & 0xFF;
intSrc <<= 8;
intSrc |= (src[1] & 0xFF);
doubleByteMappings.put(intSrc, dest);
} else {
throw new IOException(
MessageLocalization.getComposedMessage("mapping.code.should.be.1.or.two.bytes.and.not.1",
src.length));
}
}
/**
* This will add a codespace range.
*
* @param range A single codespace range.
*/
public void addCodespaceRange(CodespaceRange range) {
codeSpaceRanges.add(range);
}
/**
* Getter for property codeSpaceRanges.
*
* @return Value of property codeSpaceRanges.
*/
public List getCodeSpaceRanges() {
return codeSpaceRanges;
}
}