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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.render.rtf.rtflib.rtfdoc;
-
- /*
- * 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.
- */
-
- import java.io.IOException;
- import java.io.Writer;
- import java.util.LinkedList;
- import java.util.List;
-
- import org.apache.fop.render.rtf.rtflib.exceptions.RtfStructureException;
-
- /**
- * <p>An RtfElement that can contain other elements.</p>
- *
- * <p>This work was authored by Bertrand Delacretaz (bdelacretaz@codeconsult.ch).</p>
- */
-
- 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();
- }
-
- private int findChildren(RtfElement aChild, int iStart) {
- for (Object o : this.getChildren()) {
- final RtfElement e = (RtfElement) o;
- if (aChild == e) {
- return iStart;
- } else if (e instanceof RtfContainer) {
- int iFound = ((RtfContainer) e).findChildren(aChild, (iStart + 1));
- if (iFound != -1) {
- return iFound;
- }
- }
- }
- return -1;
- }
-
- /**
- * Find the passed child in the current container
- * @param aChild the child element
- * @return the depth (nested level) inside the current container
- */
- public int findChildren(RtfElement aChild) {
- return findChildren(aChild, 0);
- }
-
- /**
- * Add by Boris Poudérous on 07/22/2002
- * Set the children list
- * @param list list of child objects
- * @return true if process succeeded
- */
- public boolean setChildren(List list) {
- if (list instanceof LinkedList) {
- this.children = (LinkedList) list;
- return true;
- }
-
- return false;
- }
-
- /**
- * write RTF code of all our children
- * @throws IOException for I/O problems
- */
- protected void writeRtfContent()
- throws IOException {
- for (Object aChildren : children) {
- final RtfElement e = (RtfElement) aChildren;
- 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 (Object aChildren : children) {
- final RtfElement e = (RtfElement) aChildren;
- 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 (Object aChildren : children) {
- final RtfElement e = (RtfElement) aChildren;
- 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 (Object aChildren : children) {
- final RtfElement e = (RtfElement) aChildren;
- if (!e.isEmpty()) {
- result = false;
- break;
- }
- }
- return result;
- }
- }
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