com.lowagie.text.rtf.field.RtfField Maven / Gradle / Ivy
/*
* $Id: RtfField.java,v 1.8 2004/12/14 12:51:57 blowagie Exp $
* $Name: $
*
* Copyright 2004 by Mark Hall
* Uses code Copyright 2002
* SMB
* [email protected]
*
* The contents of this file are subject to the Mozilla Public License Version 1.1
* (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the License.
*
* The Original Code is 'iText, a free JAVA-PDF library'.
*
* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
* the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
*
* Contributor(s): all the names of the contributors are added in the source code
* where applicable.
*
* Alternatively, the contents of this file may be used under the terms of the
* LGPL license (the ?GNU LIBRARY GENERAL PUBLIC LICENSE?), in which case the
* provisions of LGPL are applicable instead of those above. If you wish to
* allow use of your version of this file only under the terms of the LGPL
* License and not to allow others to use your version of this file under
* the MPL, indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by the LGPL.
* If you do not delete the provisions above, a recipient may use your version
* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the MPL as stated above or under the terms of the GNU
* Library General Public License as published by the Free Software Foundation;
* either version 2 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
* details.
*
* If you didn't download this code from the following link, you should check if
* you aren't using an obsolete version:
* http://www.lowagie.com/iText/
*/
package com.lowagie.text.rtf.field;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import com.lowagie.text.Chunk;
import com.lowagie.text.Font;
import com.lowagie.text.rtf.RtfBasicElement;
import com.lowagie.text.rtf.document.RtfDocument;
import com.lowagie.text.rtf.style.RtfFont;
/**
* The RtfField class is an abstract base class for all rtf field functionality.
* Subclasses only need to implement the two abstract methods writeFieldInstContent
* and writeFieldResultContent. All other field functionality is handled by the
* RtfField class.
*
* @version $Version:$
* @author Mark Hall ([email protected])
* @author Dirk Weigenand
*/
public abstract class RtfField extends Chunk implements RtfBasicElement {
/**
* Constant for a rtf field
*/
private static final byte[] FIELD = "\\field".getBytes();
/**
* Constant for a dirty field
*/
private static final byte[] FIELD_DIRTY = "\\flddirty".getBytes();
/**
* Constant for a private field
*/
private static final byte[] FIELD_PRIVATE = "\\fldpriv".getBytes();
/**
* Constant for a locked field
*/
private static final byte[] FIELD_LOCKED = "\\fldlock".getBytes();
/**
* Constant for a edited field
*/
private static final byte[] FIELD_EDIT = "\\fldedit".getBytes();
/**
* Constant for an alt field
*/
private static final byte[] FIELD_ALT = "\\fldalt".getBytes();
/**
* Constant for the field instructions
*/
private static final byte[] FIELD_INSTRUCTIONS = "\\*\\fldinst".getBytes();
/**
* Constant for the field result
*/
private static final byte[] FIELD_RESULT = "\\fldrslt".getBytes();
/**
* Is the field dirty
*/
private boolean fieldDirty = false;
/**
* Is the field edited
*/
private boolean fieldEdit = false;
/**
* Is the field locked
*/
private boolean fieldLocked = false;
/**
* Is the field private
*/
private boolean fieldPrivate = false;
/**
* Is it an alt field
*/
private boolean fieldAlt = false;
/**
* Whether this RtfField is in a table
*/
private boolean inTable = false;
/**
* Whether this RtfElement is in a header
*/
private boolean inHeader = false;
/**
* The RtfDocument this RtfField belongs to
*/
protected RtfDocument document = null;
/**
* The RtfFont of this RtfField
*/
private RtfFont font = null;
/**
* Constructs a RtfField for a RtfDocument. This is not very usefull,
* since the RtfField by itself does not do anything. Use one of the
* subclasses instead.
*
* @param doc The RtfDocument this RtfField belongs to.
*/
protected RtfField(RtfDocument doc) {
this(doc, new Font());
}
/**
* Constructs a RtfField for a RtfDocument. This is not very usefull,
* since the RtfField by itself does not do anything. Use one of the
* subclasses instead.
*
* @param doc The RtfDocument this RtfField belongs to.
* @param font The Font this RtfField should use
*/
protected RtfField(RtfDocument doc, Font font) {
super("", font);
this.document = doc;
this.font = new RtfFont(this.document, font, 0);
}
/**
* Sets the RtfDocument this RtfElement belongs to
*
* @param doc The RtfDocument to use
*/
public void setRtfDocument(RtfDocument doc) {
this.document = doc;
this.font.setRtfDocument(this.document);
}
/**
* Writes the field beginning. Also writes field properties.
*
* @return A byte array with the field beginning.
* @throws IOException
*/
private byte[] writeFieldBegin() throws IOException {
ByteArrayOutputStream result = new ByteArrayOutputStream();
result.write(OPEN_GROUP);
result.write(FIELD);
if (fieldDirty) {
result.write(FIELD_DIRTY);
}
if (fieldEdit) {
result.write(FIELD_EDIT);
}
if (fieldLocked) {
result.write(FIELD_LOCKED);
}
if (fieldPrivate) {
result.write(FIELD_PRIVATE);
}
return result.toByteArray();
}
/**
* Writes the beginning of the field instruction area.
*
* @return The beginning of the field instruction area
* @throws IOException
*/
private byte[] writeFieldInstBegin() throws IOException {
ByteArrayOutputStream result = new ByteArrayOutputStream();
result.write(OPEN_GROUP);
result.write(FIELD_INSTRUCTIONS);
result.write(DELIMITER);
return result.toByteArray();
}
/**
* Writes the content of the field instruction area. Override this
* method in your subclasses.
*
* @return The content of the field instruction area
* @throws IOException If an error occurs.
*/
protected abstract byte[] writeFieldInstContent() throws IOException;
/**
* Writes the end of the field instruction area.
*
* @return A byte array containing the end of the field instruction area
* @throws IOException
*/
private byte[] writeFieldInstEnd() throws IOException {
ByteArrayOutputStream result = new ByteArrayOutputStream();
if (fieldAlt) {
result.write(DELIMITER);
result.write(FIELD_ALT);
}
result.write(CLOSE_GROUP);
return result.toByteArray();
}
/**
* Writes the beginning of the field result area
*
* @return A byte array containing the beginning of the field result area
* @throws IOException
*/
private byte[] writeFieldResultBegin() throws IOException {
ByteArrayOutputStream result = new ByteArrayOutputStream();
result.write(OPEN_GROUP);
result.write(FIELD_RESULT);
result.write(DELIMITER);
return result.toByteArray();
}
/**
* Writes the content of the pre-calculated field result. Override this
* method in your subclasses.
*
* @return A byte array containing the field result
* @throws IOException If an error occurs
*/
protected abstract byte[] writeFieldResultContent() throws IOException;
/**
* Writes the end of the field result area
*
* @return A byte array containing the end of the field result area
* @throws IOException
*/
private byte[] writeFieldResultEnd() throws IOException {
ByteArrayOutputStream result = new ByteArrayOutputStream();
result.write(DELIMITER);
result.write(CLOSE_GROUP);
return result.toByteArray();
}
/**
* Writes the end of the field
*
* @return A byte array containing the end of the field
* @throws IOException
*/
private byte[] writeFieldEnd() throws IOException {
ByteArrayOutputStream result = new ByteArrayOutputStream();
result.write(CLOSE_GROUP);
return result.toByteArray();
}
/**
* Write the content of this RtfField.
*
* @return A byte array containing the content of this RtfField
*/
public byte[] write() {
ByteArrayOutputStream result = new ByteArrayOutputStream();
try {
// TODO Add font handling
result.write(writeFieldBegin());
result.write(writeFieldInstBegin());
result.write(writeFieldInstContent());
result.write(writeFieldInstEnd());
result.write(writeFieldResultBegin());
result.write(writeFieldResultContent());
result.write(writeFieldResultEnd());
result.write(writeFieldEnd());
} catch(IOException ioe) {
ioe.printStackTrace();
}
return result.toByteArray();
}
/**
* Get whether this field is an alt field
*
* @return Returns whether this field is an alt field
*/
public boolean isFieldAlt() {
return fieldAlt;
}
/**
* Set whether this field is an alt field
*
* @param fieldAlt The value to use
*/
public void setFieldAlt(boolean fieldAlt) {
this.fieldAlt = fieldAlt;
}
/**
* Get whether this field is dirty
*
* @return Returns whether this field is dirty
*/
public boolean isFieldDirty() {
return fieldDirty;
}
/**
* Set whether this field is dirty
*
* @param fieldDirty The value to use
*/
public void setFieldDirty(boolean fieldDirty) {
this.fieldDirty = fieldDirty;
}
/**
* Get whether this field is edited
*
* @return Returns whether this field is edited
*/
public boolean isFieldEdit() {
return fieldEdit;
}
/**
* Set whether this field is edited.
*
* @param fieldEdit The value to use
*/
public void setFieldEdit(boolean fieldEdit) {
this.fieldEdit = fieldEdit;
}
/**
* Get whether this field is locked
*
* @return Returns the fieldLocked.
*/
public boolean isFieldLocked() {
return fieldLocked;
}
/**
* Set whether this field is locked
* @param fieldLocked The value to use
*/
public void setFieldLocked(boolean fieldLocked) {
this.fieldLocked = fieldLocked;
}
/**
* Get whether this field is private
*
* @return Returns the fieldPrivate.
*/
public boolean isFieldPrivate() {
return fieldPrivate;
}
/**
* Set whether this field is private
*
* @param fieldPrivate The value to use
*/
public void setFieldPrivate(boolean fieldPrivate) {
this.fieldPrivate = fieldPrivate;
}
/**
* Sets whether this RtfField is in a table
*
* @param inTable True if this RtfField is in a table, false otherwise
*/
public void setInTable(boolean inTable) {
this.inTable = inTable;
}
/**
* Sets whether this RtfField is in a header
*
* @param inHeader True if this RtfField is in a header, false otherwise
*/
public void setInHeader(boolean inHeader) {
this.inHeader = inHeader;
}
}