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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.pdf;
-
- import java.io.IOException;
- import java.io.OutputStream;
-
- import org.apache.commons.io.output.CountingOutputStream;
-
- /**
- * Class representing a PDF name object.
- */
- public class PDFName extends PDFObject {
-
- private String name;
-
- /**
- * Creates a new PDF name object.
- * @param name the name value
- */
- public PDFName(String name) {
- super();
- this.name = escapeName(name);
- }
-
- private static final String ESCAPED_NAME_CHARS = "/()<>[]%#";
-
- /**
- * Escapes a PDF name. It adds the leading slash and escapes characters as necessary.
- * @param name the name
- * @return the escaped name
- */
- static String escapeName(String name) {
- StringBuilder sb = new StringBuilder(Math.min(16, name.length() + 4));
- boolean skipFirst = false;
- sb.append('/');
- if (name.startsWith("/")) {
- skipFirst = true;
- }
- for (int i = (skipFirst ? 1 : 0), c = name.length(); i < c; i++) {
- char ch = name.charAt(i);
-
- if (ch < 33 || ch > 126 || ESCAPED_NAME_CHARS.indexOf(ch) >= 0) {
- sb.append('#');
- toHex(ch, sb);
- } else {
- sb.append(ch);
- }
- }
- return sb.toString();
- }
-
- private static final char[] DIGITS
- = {'0', '1', '2', '3', '4', '5', '6', '7',
- '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
-
- private static void toHex(char ch, StringBuilder sb) {
- if (ch >= 256) {
- throw new IllegalArgumentException(
- "Only 8-bit characters allowed by this implementation");
- }
- sb.append(DIGITS[ch >>> 4 & 0x0F]);
- sb.append(DIGITS[ch & 0x0F]);
- }
-
- /** {@inheritDoc} */
- @Override
- public String toString() {
- return this.name;
- }
-
- /**
- * Returns the name without the leading slash.
- * @return the name without the leading slash
- */
- public String getName() {
- return this.name.substring(1);
- }
-
- /** {@inheritDoc} */
- public boolean equals(Object obj) {
- if (!(obj instanceof PDFName)) {
- return false;
- }
- PDFName other = (PDFName)obj;
- return this.name.equals(other.name);
- }
-
- /** {@inheritDoc} */
- public int hashCode() {
- return name.hashCode();
- }
-
- @Override
- public int output(OutputStream stream) throws IOException {
- CountingOutputStream cout = new CountingOutputStream(stream);
- StringBuilder textBuffer = new StringBuilder(64);
- textBuffer.append(toString());
- PDFDocument.flushTextBuffer(textBuffer, cout);
- return cout.getCount();
- }
-
- @Override
- public void outputInline(OutputStream out, StringBuilder textBuffer) throws IOException {
- if (hasObjectNumber()) {
- textBuffer.append(referencePDF());
- } else {
- textBuffer.append(toString());
- }
- }
-
- }
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