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- /*
- * $Id$
- * ============================================================================
- * 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/>.
- */
-
- /*
- * 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.
- */
-
- package org.apache.fop.render.rtf.rtflib.rtfdoc;
-
- import java.io.Writer;
- import java.util.LinkedList;
- import java.util.List;
- import java.util.Iterator;
- import java.io.IOException;
- import org.apache.fop.render.rtf.rtflib.exceptions.RtfStructureException;
-
- /** An RtfElement that can contain other elements.
- * @author Bertrand Delacretaz bdelacretaz@codeconsult.ch
- */
-
- public class RtfContainer extends RtfElement {
- private LinkedList children; // 'final' removed by Boris Poudérous on 07/22/2002
- private RtfOptions options = new RtfOptions();
- private RtfElement lastChild;
-
- /** Create an RTF container as a child of given container */
- RtfContainer(RtfContainer parent, Writer w) throws IOException {
- this(parent, w, null);
- }
-
- /** Create an RTF container as a child of given container with given attributes */
- RtfContainer(RtfContainer parent, Writer w, RtfAttributes attr) throws IOException {
- super(parent, w, attr);
- children = new LinkedList();
- }
-
- /**
- * set options
- * @param opt options to set
- */
- public void setOptions(RtfOptions opt) {
- options = opt;
- }
-
- /**
- * add a child element to this
- * @param e child element to add
- * @throws RtfStructureException for trying to add an invalid child (??)
- */
- protected void addChild(RtfElement e)
- throws RtfStructureException {
- if (isClosed()) {
- // No childs should be added to a container that has been closed
- final StringBuffer sb = new StringBuffer();
- sb.append("addChild: container already closed (parent=");
- sb.append(this.getClass().getName());
- sb.append(" child=");
- sb.append(e.getClass().getName());
- sb.append(")");
- final String msg = sb.toString();
-
- // warn of this problem
- final RtfFile rf = getRtfFile();
- // if(rf.getLog() != null) {
- // rf.getLog().logWarning(msg);
- // }
-
- // TODO this should be activated to help detect XSL-FO constructs
- // that we do not handle properly.
- /*
- throw new RtfStructureException(msg);
- */
- }
-
- children.add(e);
- lastChild = e;
- }
-
- /**
- * @return a copy of our children's list
- */
- public List getChildren() {
- return (List)children.clone();
- }
-
- /**
- * @return the number of children
- */
- public int getChildCount() {
- return children.size();
- }
-
- /**
- * Add by Boris Poudérous on 07/22/2002
- * Set the children list
- * @param children list of child objects
- * @return true if process succeeded
- */
- public boolean setChildren (List children) {
- if (children instanceof LinkedList) {
- this.children = (LinkedList)children;
- return true;
- }
-
- return false;
- }
-
- /**
- * write RTF code of all our children
- * @throws IOException for I/O problems
- */
- protected void writeRtfContent()
- throws IOException {
- for (Iterator it = children.iterator(); it.hasNext();) {
- final RtfElement e = (RtfElement)it.next();
- e.writeRtf();
- }
- }
-
- /** return our options */
- RtfOptions getOptions() {
- return options;
- }
-
- /** true if this (recursively) contains at least one RtfText object */
- boolean containsText() {
- boolean result = false;
- for (Iterator it = children.iterator(); it.hasNext();) {
- final RtfElement e = (RtfElement)it.next();
- if (e instanceof RtfText) {
- result = !e.isEmpty();
- } else if (e instanceof RtfContainer) {
- if (((RtfContainer)e).containsText()) {
- result = true;
- }
- }
- if (result) {
- break;
- }
- }
- return result;
- }
-
- /** debugging to given Writer */
- void dump(Writer w, int indent)
- throws IOException {
- super.dump(w, indent);
- for (Iterator it = children.iterator(); it.hasNext();) {
- final RtfElement e = (RtfElement)it.next();
- e.dump(w, indent + 1);
- }
- }
-
- /**
- * minimal debugging display
- * @return String representation of object contents
- */
- public String toString() {
- return super.toString() + " (" + getChildCount() + " children)";
- }
-
- /**
- * @return false if empty or if our options block writing
- */
- protected boolean okToWriteRtf() {
- boolean result = super.okToWriteRtf() && !isEmpty();
- if (result && !options.renderContainer(this)) {
- result = false;
- }
- return result;
- }
-
- /**
- * @return true if this element would generate no "useful" RTF content,
- * i.e. (for RtfContainer) true if it has no children where isEmpty() is false
- */
- public boolean isEmpty() {
- boolean result = true;
- for (Iterator it = children.iterator(); it.hasNext();) {
- final RtfElement e = (RtfElement)it.next();
- if (!e.isEmpty()) {
- result = false;
- break;
- }
- }
- return result;
- }
- }
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