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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.afp.goca;
import java.io.IOException;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import org.apache.fop.afp.AFPConstants;
/**
* A GOCA graphics string
*/
public class GraphicsCharacterString extends AbstractGraphicsCoord {
/** Up to 255 bytes of character data */
protected static final int MAX_STR_LEN = 255;
/** the string to draw */
protected final String str;
/**
* Constructor (absolute positioning)
*
* @param str the character string
* @param x the x coordinate
* @param y the y coordinate
*/
public GraphicsCharacterString(String str, int x, int y) {
super(x, y);
this.str = truncate(str);
}
/**
* Constructor (relative positioning)
*
* @param str the character string
* @param x the x coordinate
* @param y the y coordinate
*/
public GraphicsCharacterString(String str) {
super(null);
this.str = truncate(str);
}
/** {@inheritDoc} */
byte getOrderCode() {
if (isRelative()) {
return (byte)0x83;
} else {
return (byte)0xC3;
}
}
/** {@inheritDoc} */
public int getDataLength() {
return super.getDataLength() + str.length();
}
/** {@inheritDoc} */
public void writeToStream(OutputStream os) throws IOException {
byte[] data = getData();
byte[] strData = getStringAsBytes();
System.arraycopy(strData, 0, data, 6, strData.length);
os.write(data);
}
/**
* Truncates the string as necessary
*
* @param str a character string
* @return a possibly truncated string
*/
private String truncate(String str) {
if (str.length() > MAX_STR_LEN) {
str = str.substring(0, MAX_STR_LEN);
log.warn("truncated character string, longer than " + MAX_STR_LEN + " chars");
}
return str;
}
/**
* Returns the text string as an encoded byte array
*
* @return the text string as an encoded byte array
*/
private byte[] getStringAsBytes() throws UnsupportedEncodingException {
return str.getBytes(AFPConstants.EBCIDIC_ENCODING);
}
/** {@inheritDoc} */
public String toString() {
return "GraphicsCharacterString{"
+ (coords != null ? "x=" + coords[0] + ", y=" + coords[1] : "")
+ "str='" + str + "'" + "}";
}
}
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