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/*
* Copyright 1999-2005 The Apache Software Foundation.
*
* Licensed 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.fo;
import org.xml.sax.Locator;
import org.apache.fop.apps.FOPException;
/**
* Base class for representation of mixed content formatting objects
* (i.e., those that can contain both child FO's and text nodes/PCDATA).
* It should not be instantiated directly.
*/
public abstract class FObjMixed extends FObj {
/** Represents accumulated, pending FO text. See flushText(). */
protected FOText ft = null;
/**
* @param parent FONode that is the parent of this object
*/
protected FObjMixed(FONode parent) {
super(parent);
}
/** @see org.apache.fop.fo.FONode */
protected void addCharacters(char[] data, int start, int end,
PropertyList pList,
Locator locator) throws FOPException {
if (ft == null) {
ft = new FOText(this);
ft.setLocator(locator);
ft.bind(pList);
}
ft.addCharacters(data, start, end, null, null);
}
/** @see org.apache.fop.fo.FONode#endOfNode() */
protected void endOfNode() throws FOPException {
flushText();
super.endOfNode();
}
/**
* Adds accumulated text as one FOText instance.
* Makes sure that nested calls to itself do nothing.
* @throws FOPException if there is a problem during processing
*/
protected void flushText() throws FOPException {
if (ft != null) {
FOText lft = ft;
ft = null;
lft.endOfNode();
getFOEventHandler().characters(lft.ca, lft.startIndex, lft.endIndex);
addChildNode(lft);
}
}
protected void addChildNode(FONode child) throws FOPException {
flushText();
super.addChildNode(child);
}
/**
* @return iterator for this object
*/
public CharIterator charIterator() {
return new RecursiveCharIterator(this);
}
}
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