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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.render.rtf.rtflib.rtfdoc;
-
- /*
- * This file is part of the RTF library of the FOP project, which was originally
- * created by Bertrand Delacretaz <bdelacretaz@codeconsult.ch> and by other
- * contributors to the jfor project (www.jfor.org), who agreed to donate jfor to
- * the FOP project.
- */
-
- import java.io.IOException;
- import java.io.Writer;
- import java.util.HashMap;
- import java.util.Map;
-
- /**
- * <p>Converts java Strings according to RTF conventions.</p>
- *
- * <p>This work was authored by Bertrand Delacretaz (bdelacretaz@codeconsult.ch).</p>
- */
-
- public final class RtfStringConverter {
-
- private static final RtfStringConverter INSTANCE = new RtfStringConverter();
- private static final Map SPECIAL_CHARS;
- private static final Character DBLQUOTE = '\"';
- private static final Character QUOTE = '\'';
- private static final Character SPACE = ' ';
-
- /** List of characters to escape with corresponding replacement strings */
- static {
- SPECIAL_CHARS = new HashMap();
- SPECIAL_CHARS.put('\t', "tab");
- SPECIAL_CHARS.put('\n', "line");
- SPECIAL_CHARS.put('\'', "rquote");
- SPECIAL_CHARS.put('\"', "rdblquote");
- SPECIAL_CHARS.put('\\', "\\");
- SPECIAL_CHARS.put('{', "{");
- SPECIAL_CHARS.put('}', "}");
- }
-
- /** singleton pattern */
- private RtfStringConverter() {
- }
-
- /**
- * use this to get an object of this class
- * @return the singleton instance
- */
- public static RtfStringConverter getInstance() {
- return INSTANCE;
- }
-
- /**
- * Write given String to given Writer, converting characters as required by
- * RTF spec
- * @param w Writer
- * @param str String to be written
- * @throws IOException for I/O problems
- */
- public void writeRtfString(Writer w, String str) throws IOException {
- if (str == null) {
- return;
- }
- w.write(escape(str));
- }
-
- /**
- * Escapes a String as required by the RTF spec.
- * @param str String to be escaped
- * @return the escaped string
- */
- public String escape(String str) {
- if (str == null) {
- return null;
- }
-
- StringBuffer sb = new StringBuffer(Math.max(16, str.length()));
- // TODO: could be made more efficient (binary lookup, etc.)
- for (int i = 0; i < str.length(); i++) {
- final Character c = str.charAt(i);
- Character d;
- String replacement;
- if (i != 0) {
- d = str.charAt(i - 1);
- } else {
- d = SPACE;
- }
-
- //This section modified by Chris Scott
- //add "smart" quote recognition
- if (c.equals((Object)DBLQUOTE) && d.equals((Object)SPACE)) {
- replacement = "ldblquote";
- } else if (c.equals((Object)QUOTE) && d.equals((Object)SPACE)) {
- replacement = "lquote";
- } else {
- replacement = (String)SPECIAL_CHARS.get(c);
- }
-
- if (replacement != null) {
- // RTF-escaped char
- sb.append('\\');
- sb.append(replacement);
- sb.append(' ');
- } else if (c.charValue() > 127) {
- // write unicode representation - contributed by Michel Jacobson
- // <jacobson@idf.ext.jussieu.fr>
- sb.append("\\u");
- sb.append(Integer.toString((int)c.charValue()));
- sb.append("\\\'3f");
- } else {
- // plain char that is understood by RTF natively
- sb.append(c.charValue());
- }
- }
- return sb.toString();
- }
-
- }
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