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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.fo;
import org.xml.sax.Locator;
import org.apache.fop.apps.FOPException;
/**
* Abstract base class for representation of mixed content formatting objects
* (= those that can contain both child {@link FONode}s and <code>#PCDATA</code>).
*/
public abstract class FObjMixed extends FObj {
/** Represents accumulated, pending FO text. See {@link #flushText()}. */
protected FOText ft = null;
/** Used for white-space handling; start CharIterator at node ... */
protected FONode currentTextNode;
/** Used in creating pointers between subsequent {@link FOText} nodes
* in the same {@link org.apache.fop.fo.flow.Block}
* (for handling text-transform) */
protected FOText lastFOTextProcessed = null;
/**
* Base constructor
*
* @param parent FONode that is the parent of this object
*/
protected FObjMixed(FONode parent) {
super(parent);
}
/** {@inheritDoc} */
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);
if (!inMarker()) {
ft.bind(pList);
}
}
ft.addCharacters(data, start, end, null, null);
}
/** {@inheritDoc} */
protected void endOfNode() throws FOPException {
flushText();
if (!inMarker()
|| getNameId() == FO_MARKER) {
getFOEventHandler().whiteSpaceHandler
.handleWhiteSpace(this, currentTextNode);
}
super.endOfNode();
}
/**
* Handles white-space for the node that is passed in,
* starting at its current text-node
* (used by {@link org.apache.fop.fo.flow.RetrieveMarker}
* to trigger 'end-of-node' white-space handling)
*
* @param fobj the node for which to handle white-space
*/
protected static void handleWhiteSpaceFor(FObjMixed fobj) {
fobj.getFOEventHandler().getXMLWhiteSpaceHandler()
.handleWhiteSpace(fobj, fobj.currentTextNode);
}
/**
* Adds accumulated text as one FOText instance, unless
* the one instance's <code>char</code> array contains more than
* <code>Short.MAX_VALUE</code> characters. In the latter case the
* instance is split up into more manageable chunks.
*
* @throws FOPException if there is a problem during processing
*/
protected void flushText() throws FOPException {
if (ft != null) {
FOText lft = ft;
/* make sure nested calls to itself have no effect */
ft = null;
FOText tmpText;
int indexStart = 0;
int indexEnd = (lft.ca.length > Short.MAX_VALUE
? Short.MAX_VALUE : lft.ca.length) - 1;
int charCount = 0;
short tmpSize;
while (charCount < lft.ca.length) {
tmpSize = (short) (indexEnd - indexStart + 1);
charCount += tmpSize;
tmpText = (FOText) lft.clone(this, false);
tmpText.ca = new char[tmpSize];
tmpText.startIndex = 0;
tmpText.endIndex = tmpSize;
System.arraycopy(lft.ca, indexStart,
tmpText.ca, 0, indexEnd - indexStart + 1);
if (getNameId() == FO_BLOCK) {
tmpText.createBlockPointers((org.apache.fop.fo.flow.Block) this);
this.lastFOTextProcessed = tmpText;
} else if (getNameId() != FO_MARKER
&& getNameId() != FO_TITLE
&& getNameId() != FO_BOOKMARK_TITLE) {
FONode fo = parent;
int foNameId = fo.getNameId();
while (foNameId != FO_BLOCK
&& foNameId != FO_MARKER
&& foNameId != FO_TITLE
&& foNameId != FO_BOOKMARK_TITLE
&& foNameId != FO_PAGE_SEQUENCE) {
fo = fo.getParent();
foNameId = fo.getNameId();
}
if (foNameId == FO_BLOCK) {
tmpText.createBlockPointers((org.apache.fop.fo.flow.Block) fo);
((FObjMixed) fo).lastFOTextProcessed = tmpText;
} else if (foNameId == FO_PAGE_SEQUENCE
&& tmpText.willCreateArea()) {
log.error("Could not create block pointers."
+ " FOText w/o Block ancestor.");
}
}
tmpText.endOfNode();
addChildNode(tmpText);
indexStart = indexEnd + 1;
indexEnd = (((lft.ca.length - charCount) < Short.MAX_VALUE)
? lft.ca.length : charCount + Short.MAX_VALUE) - 1;
}
}
}
/** {@inheritDoc} */
protected void addChildNode(FONode child) throws FOPException {
flushText();
if (!inMarker()) {
if (child instanceof FOText || child.getNameId() == FO_CHARACTER) {
if (currentTextNode == null) {
currentTextNode = child;
}
} else {
// handle white-space for all text up to here
getFOEventHandler().whiteSpaceHandler
.handleWhiteSpace(this, currentTextNode, child);
currentTextNode = null;
}
}
super.addChildNode(child);
}
/**
* Returns a {@link CharIterator} over this FO's character content
*
* @return iterator for this object
*/
public CharIterator charIterator() {
return new RecursiveCharIterator(this);
}
}
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