--- /dev/null
+/*
+ * $Id$
+ * ============================================================================
+ * The Apache Software License, Version 1.1
+ * ============================================================================
+ *
+ * Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modifica-
+ * tion, 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. The end-user documentation included with the redistribution, if any, must
+ * include the following acknowledgment: "This product includes software
+ * developed by the Apache Software Foundation (http://www.apache.org/)."
+ * Alternately, this acknowledgment may appear in the software itself, if
+ * and wherever such third-party acknowledgments normally appear.
+ *
+ * 4. The names "FOP" and "Apache Software Foundation" must not be used to
+ * endorse or promote products derived from this software without prior
+ * written permission. For written permission, please contact
+ * apache@apache.org.
+ *
+ * 5. Products derived from this software may not be called "Apache", nor may
+ * "Apache" appear in their name, without prior written permission of the
+ * Apache Software Foundation.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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
+ * APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
+ * DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ============================================================================
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * on behalf of the Apache Software Foundation and was originally created by
+ * James Tauber <jtauber@jtauber.com>. For more information on the Apache
+ * Software Foundation, please see <http://www.apache.org/>.
+ */
+package org.apache.fop.pdf;
+
+import java.io.ByteArrayOutputStream;
+import java.io.UnsupportedEncodingException;
+
+import org.apache.avalon.framework.CascadingRuntimeException;
+
+/**
+ * This class represents a simple number object. It also contains contains some
+ * utility methods for outputing numbers to PDF.
+ */
+public class PDFText extends PDFObject {
+
+ private static final char[] DIGITS =
+ {'0', '1', '2', '3', '4', '5', '6', '7',
+ '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
+
+ private String text;
+
+ /**
+ * Returns the text.
+ * @return the text
+ */
+ public String getText() {
+ return this.text;
+ }
+
+ /**
+ * Sets the text.
+ * @param text the text
+ */
+ public void setText(String text) {
+ this.text = text;
+ }
+
+ /**
+ * @see org.apache.fop.pdf.PDFObject#toPDFString()
+ */
+ protected String toPDFString() {
+ if (getText() == null) {
+ throw new IllegalArgumentException(
+ "The text of this PDFText must not be empty");
+ }
+ StringBuffer sb = new StringBuffer(64);
+ sb.append(getObjectID());
+ sb.append("(");
+ sb.append(escapeText(getText()));
+ sb.append(")");
+ sb.append("\nendobj\n");
+ return sb.toString();
+ }
+
+ /**
+ * Escape text (see 4.4.1 in PDF 1.3 specs)
+ * @param text the text to encode
+ * @return encoded text
+ */
+ public static final String escapeText(final String text) {
+ return escapeText(text, true);
+ }
+ /**
+ * Escape text (see 4.4.1 in PDF 1.3 specs)
+ * @param text the text to encode
+ * @param hexMode true if the output should follow the hex encoding rules
+ * @return encoded text
+ */
+ public static final String escapeText(final String text, boolean hexMode) {
+ if (text != null && text.length() > 0) {
+ if (hexMode) {
+ final byte[] uniBytes;
+ try {
+ uniBytes = text.getBytes("UnicodeBig");
+ } catch (java.io.UnsupportedEncodingException uee) {
+ throw new CascadingRuntimeException("Incompatible VM", uee);
+ }
+ return toHex(uniBytes);
+ } else {
+ final StringBuffer result = new StringBuffer(text.length() * 2);
+ result.append("(");
+ final int l = text.length();
+
+ // byte order marker (0xfeff)
+ result.append("\\376\\377");
+
+ for (int i = 0; i < l; i++) {
+ final char ch = text.charAt(i);
+ //if (ch < 128) {
+ // result.append('\u0000');
+ // result.append(ch);
+ //} else {
+ final int high = (ch & 0xff00) >>> 8;
+ final int low = ch & 0xff;
+ result.append("\\");
+ result.append(Integer.toOctalString(high));
+ result.append("\\");
+ result.append(Integer.toOctalString(low));
+ //}
+ }
+ result.append(")");
+ return result.toString();
+ }
+ }
+ return "()";
+ }
+
+ /**
+ * Converts a byte array to a Hexadecimal String (3.2.3 in PDF 1.4 specs)
+ * @param data the data to encode
+ * @return String the resulting string
+ */
+ public static final String toHex(byte[] data) {
+ final StringBuffer sb = new StringBuffer(data.length * 2);
+ sb.append("<");
+ for (int i = 0; i < data.length; i++) {
+ sb.append(DIGITS[(data[i] >>> 4) & 0x0F]);
+ sb.append(DIGITS[data[i] & 0x0F]);
+ }
+ sb.append(">");
+ return sb.toString();
+ }
+
+ /**
+ * Converts a String to UTF-16 (big endian).
+ * @param text text to convert
+ * @return byte[] UTF-17 stream
+ */
+ public static final byte[] toUTF16(String text) {
+ try {
+ return text.getBytes("UnicodeBig");
+ } catch (java.io.UnsupportedEncodingException uee) {
+ throw new CascadingRuntimeException("Incompatible VM", uee);
+ }
+ }
+
+ /**
+ * Convert a char to a multibyte hex representation
+ * @param c character to encode
+ * @return the encoded character
+ */
+ public static final String toUnicodeHex(char c) {
+ final StringBuffer buf = new StringBuffer(4);
+ final byte[] uniBytes;
+ try {
+ final char[] a = {c};
+ uniBytes = new String(a).getBytes("UnicodeBigUnmarked");
+ } catch (java.io.UnsupportedEncodingException uee) {
+ throw new CascadingRuntimeException("Incompatible VM", uee);
+ }
+
+ for (int i = 0; i < uniBytes.length; i++) {
+ buf.append(DIGITS[(uniBytes[i] >>> 4) & 0x0F]);
+ buf.append(DIGITS[uniBytes[i] & 0x0F]);
+ }
+ return buf.toString();
+ }
+
+ /**
+ * Escaped a String as described in section 4.4 in the PDF 1.3 specs.
+ * @param s String to escape
+ * @return String the escaped String
+ */
+ public static final String escapeString(final String s) {
+ if (s == null || s.length() == 0) {
+ return "()";
+ } else {
+ final StringBuffer sb = new StringBuffer(64);
+ sb.append("(");
+ for (int i = 0; i < s.length(); i++) {
+ final char c = s.charAt(i);
+ escapeStringChar(c, sb);
+ }
+ sb.append(")");
+ return sb.toString();
+ }
+ }
+
+ /**
+ * Escapes a character conforming to the rules established in the PostScript
+ * Language Reference (Search for "Literal Text Strings").
+ * @param c character to escape
+ * @param target target StringBuffer to write the escaped character to
+ */
+ public static final void escapeStringChar(final char c, final StringBuffer target) {
+ if (c > 127) {
+ target.append("\\");
+ target.append(Integer.toOctalString(c));
+ } else {
+ switch (c) {
+ case '\n':
+ target.append("\\n");
+ break;
+ case '\r':
+ target.append("\\r");
+ break;
+ case '\t':
+ target.append("\\t");
+ break;
+ case '\b':
+ target.append("\\b");
+ break;
+ case '\f':
+ target.append("\\f");
+ break;
+ case '\\':
+ target.append("\\\\");
+ break;
+ case '(':
+ target.append("\\(");
+ break;
+ case ')':
+ target.append("\\)");
+ break;
+ default:
+ target.append(c);
+ }
+ }
+ }
+
+ /**
+ * Escape a byte array for output to PDF (Used for encrypted strings)
+ * @param data data to encode
+ * @return byte[] encoded data
+ */
+ public static final byte[] escapeByteArray(byte[] data) {
+ ByteArrayOutputStream bout = new ByteArrayOutputStream(data.length);
+ bout.write((int)'(');
+ for (int i = 0; i < data.length; i++) {
+ final int b = data[i];
+ switch (b) {
+ case '\n':
+ bout.write('\\');
+ bout.write('n');
+ break;
+ case '\r':
+ bout.write('\\');
+ bout.write('r');
+ break;
+ case '\t':
+ bout.write('\\');
+ bout.write('t');
+ break;
+ case '\b':
+ bout.write('\\');
+ bout.write('b');
+ break;
+ case '\f':
+ bout.write('\\');
+ bout.write('f');
+ break;
+ case '\\':
+ bout.write('\\');
+ bout.write('\\');
+ break;
+ case '(':
+ bout.write('\\');
+ bout.write('(');
+ break;
+ case ')':
+ bout.write('\\');
+ bout.write(')');
+ break;
+ default:
+ bout.write(b);
+ }
+ }
+ bout.write((int)')');
+ return bout.toByteArray();
+ }
+
+}
+
projects / xmlgraphics-fop.git / commitdiff