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/*
* Copyright 1999-2004 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.flow;
// Java
import java.util.ArrayList;
import java.util.List;
// XML
import org.xml.sax.Attributes;
import org.xml.sax.Locator;
import org.xml.sax.SAXParseException;
// FOP
import org.apache.fop.fo.FOElementMapping;
import org.apache.fop.fo.FONode;
import org.apache.fop.fo.FObjMixed;
import org.apache.fop.layoutmgr.BidiLayoutManager;
import org.apache.fop.layoutmgr.InlineStackingLayoutManager;
import org.apache.fop.layoutmgr.LayoutManager;
import org.apache.fop.fo.properties.CommonAural;
import org.apache.fop.fo.properties.CommonRelativePosition;
/**
* fo:bidi-override element.
*/
public class BidiOverride extends FObjMixed {
// used for FO validation
private boolean blockOrInlineItemFound = false;
private boolean canHaveBlockLevelChildren = true;
/**
* @param parent FONode that is the parent of this object
*/
public BidiOverride(FONode parent) {
super(parent);
/* Check to see if this node can have block-level children.
* See validateChildNode() below.
*/
int lvlLeader = findAncestor("fo:leader");
int lvlInCntr = findAncestor("fo:inline-container");
int lvlInline = findAncestor("fo:inline");
int lvlFootnote = findAncestor("fo:footnote");
if (lvlLeader > 0) {
if (lvlInCntr < 0 ||
(lvlInCntr > 0 && lvlInCntr > lvlLeader)) {
canHaveBlockLevelChildren = false;
}
} else if (lvlInline > 0 && lvlFootnote == (lvlInline + 1)) {
if (lvlInCntr < 0 ||
(lvlInCntr > 0 && lvlInCntr > lvlInline)) {
canHaveBlockLevelChildren = false;
}
}
}
/**
* @see org.apache.fop.fo.FObj#addProperties
*/
protected void addProperties(Attributes attlist) throws SAXParseException {
super.addProperties(attlist);
setupID();
}
/**
* @see org.apache.fop.fo.FONode#validateChildNode(Locator, String, String)
* XSL Content Model: marker* (#PCDATA|%inline;|%block;)*
* Additionally: "An fo:bidi-override that is a descendant of an fo:leader
* or of the fo:inline child of an fo:footnote may not have block-level
* children, unless it has a nearer ancestor that is an
* fo:inline-container."
*/
protected void validateChildNode(Locator loc, String nsURI, String localName)
throws SAXParseException {
if (nsURI == FOElementMapping.URI && localName.equals("marker")) {
if (blockOrInlineItemFound) {
nodesOutOfOrderError(loc, "fo:marker",
"(#PCDATA|%inline;|%block;)");
}
} else if (!isBlockOrInlineItem(nsURI, localName)) {
invalidChildError(loc, nsURI, localName);
} else if (!canHaveBlockLevelChildren && isBlockItem(nsURI, localName)) {
invalidChildError(loc, nsURI, localName);
} else {
blockOrInlineItemFound = true;
}
}
public String getName() {
return "fo:bidi-override";
}
/**
* @return true (BidiOverride can contain Markers)
*/
protected boolean containsMarkers() {
return true;
}
/**
* This is a hook for the AddLMVisitor class to be able to access
* this object.
* @param aLMV the AddLMVisitor object that can access this object.
*/
public void addLayoutManager(List list) {
if (false) {
super.addLayoutManager(list);
} else {
ArrayList childList = new ArrayList();
super.addLayoutManager(list);
for (int count = childList.size() - 1; count >= 0; count--) {
LayoutManager lm = (LayoutManager) childList.get(count);
if (lm.generatesInlineAreas()) {
LayoutManager blm = new BidiLayoutManager((InlineStackingLayoutManager) lm);
blm.setFObj(this);
list.add(blm);
} else {
list.add(lm);
}
}
}
}
}
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