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- /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
- /* $Id$ */
-
- package org.apache.fop.fonts;
-
- import java.util.ArrayList;
- import java.util.Arrays;
- import java.util.HashMap;
- import java.util.List;
- import java.util.Map;
-
- import org.apache.xmlgraphics.fonts.Glyphs;
-
- import org.apache.fop.util.CharUtilities;
-
- /**
- * A simple implementation of the OneByteEncoding mostly used for encodings that are constructed
- * on-the-fly.
- */
- public class SimpleSingleByteEncoding implements SingleByteEncoding {
-
- private final String name;
- private final List<NamedCharacter> mapping = new ArrayList<NamedCharacter>();
- private final Map<Character, Character> charMap = new HashMap<Character, Character>();
-
- /**
- * Main constructor.
- * @param name the encoding's name
- */
- public SimpleSingleByteEncoding(String name) {
- this.name = name;
- }
-
- /** {@inheritDoc} */
- public String getName() {
- return this.name;
- }
-
- /** {@inheritDoc} */
- public char mapChar(char c) {
- Character nc = charMap.get(Character.valueOf(c));
- if (nc != null) {
- return nc.charValue();
- }
- return NOT_FOUND_CODE_POINT;
- }
-
- /** {@inheritDoc} */
- public String[] getCharNameMap() {
- String[] map = new String[getSize()];
- Arrays.fill(map, Glyphs.NOTDEF);
- for (int i = getFirstChar(); i <= getLastChar(); i++) {
- NamedCharacter ch = this.mapping.get(i - 1);
- map[i] = ch.getName();
- }
- return map;
- }
-
- /**
- * Returns the index of the first defined character.
- * @return the index of the first defined character (always 1 for this class)
- */
- public int getFirstChar() {
- return 1;
- }
-
- /**
- * Returns the index of the last defined character.
- * @return the index of the last defined character
- */
- public int getLastChar() {
- return this.mapping.size();
- }
-
- /**
- * Returns the number of characters defined by this encoding.
- * @return the number of characters
- */
- public int getSize() {
- return this.mapping.size() + 1;
- }
-
- /**
- * Indicates whether the encoding is full (with 256 code points).
- * @return true if the encoding is full
- */
- public boolean isFull() {
- return (getSize() == 256);
- }
-
- /**
- * Adds a new character to the encoding.
- * @param ch the named character
- * @return the code point assigned to the character
- */
- public char addCharacter(NamedCharacter ch) {
- if (!ch.hasSingleUnicodeValue()) {
- throw new IllegalArgumentException("Only NamedCharacters with a single Unicode value"
- + " are currently supported!");
- }
- if (isFull()) {
- throw new IllegalStateException("Encoding is full!");
- }
- char newSlot = (char)(getLastChar() + 1);
- this.mapping.add(ch);
- this.charMap.put(Character.valueOf(ch.getSingleUnicodeValue()), Character.valueOf(newSlot));
- return newSlot;
- }
-
- /**
- * Returns the named character at a given code point in the encoding.
- * @param codePoint the code point of the character
- * @return the NamedCharacter (or null if no character is at this position)
- */
- public NamedCharacter getCharacterForIndex(int codePoint) {
- if (codePoint < 0 || codePoint > 255) {
- throw new IllegalArgumentException("codePoint must be between 0 and 255");
- }
- if (codePoint <= getLastChar()) {
- return this.mapping.get(codePoint - 1);
- } else {
- return null;
- }
- }
-
- /** {@inheritDoc} */
- public char[] getUnicodeCharMap() {
- char[] map = new char[getLastChar() + 1];
- for (int i = 0; i < getFirstChar(); i++) {
- map[i] = CharUtilities.NOT_A_CHARACTER;
- }
- for (int i = getFirstChar(); i <= getLastChar(); i++) {
- map[i] = getCharacterForIndex(i).getSingleUnicodeValue();
- }
- return map;
- }
-
- /** {@inheritDoc} */
- @Override
- public String toString() {
- return getName() + " (" + getSize() + " chars)";
- }
-
- }
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