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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.pagination;
// XML
import org.xml.sax.Attributes;
import org.xml.sax.Locator;
import org.xml.sax.SAXParseException;
// FOP
import org.apache.fop.fo.FONode;
import org.apache.fop.fo.FObj;
import org.apache.fop.layoutmgr.AddLMVisitor;
import org.apache.fop.apps.FOPException;
/**
* A conditional-page-master-reference formatting object.
* This is a reference to a page master with a set of conditions.
* The conditions must be satisfied for the referenced master to
* be used.
* This element is must be the child of a repeatable-page-master-alternatives
* element.
*/
public class ConditionalPageMasterReference extends FObj {
private RepeatablePageMasterAlternatives repeatablePageMasterAlternatives;
private String masterName;
private int pagePosition;
private int oddOrEven;
private int blankOrNotBlank;
/**
* @see org.apache.fop.fo.FONode#FONode(FONode)
*/
public ConditionalPageMasterReference(FONode parent) {
super(parent);
}
/**
* @see org.apache.fop.fo.FONode#validateChildNode(Locator, String, String)
* XSL Content Model: empty
*/
protected void validateChildNode(Locator loc, String nsURI, String localName)
throws SAXParseException {
invalidChildError(loc, nsURI, localName);
}
/**
* @see org.apache.fop.fo.FObj#addProperties
*/
protected void addProperties(Attributes attlist) throws FOPException {
super.addProperties(attlist);
if (getProperty(PR_MASTER_REFERENCE) != null) {
setMasterName(getProperty(PR_MASTER_REFERENCE).getString());
}
validateParent(parent);
this.pagePosition = this.propertyList.get(PR_PAGE_POSITION).getEnum();
this.oddOrEven = this.propertyList.get(PR_ODD_OR_EVEN).getEnum();
this.blankOrNotBlank = this.propertyList.get(PR_BLANK_OR_NOT_BLANK).getEnum();
}
/**
* Sets the master name.
* @param masterName name for the master
*/
protected void setMasterName(String masterName) {
this.masterName = masterName;
}
/**
* Returns the "master-name" attribute of this page master reference
* @return the master name
*/
public String getMasterName() {
return masterName;
}
/**
* Check if the conditions for this reference are met.
* checks the page number and emptyness to determine if this
* matches.
* @param isOddPage True if page number odd
* @param isFirstPage True if page is first page
* @param isBlankPage True if page is blank
* @return True if the conditions for this reference are met
*/
protected boolean isValid(boolean isOddPage,
boolean isFirstPage,
boolean isBlankPage) {
// page-position
if (isFirstPage) {
if (pagePosition == PagePosition.REST) {
return false;
} else if (pagePosition == PagePosition.LAST) {
// ?? how can one know at this point?
getLogger().debug("LAST PagePosition NYI");
return false;
}
} else {
if (pagePosition == PagePosition.FIRST) {
return false;
} else if (pagePosition == PagePosition.LAST) {
// ?? how can one know at this point?
getLogger().debug("LAST PagePosition NYI");
// potentially valid, don't return
}
}
// odd-or-even
if (isOddPage) {
if (oddOrEven == OddOrEven.EVEN) {
return false;
}
} else {
if (oddOrEven == OddOrEven.ODD) {
return false;
}
}
// blank-or-not-blank
if (isBlankPage) {
if (blankOrNotBlank == BlankOrNotBlank.NOT_BLANK) {
return false;
}
} else {
if (blankOrNotBlank == BlankOrNotBlank.BLANK) {
return false;
}
}
return true;
}
/**
* Check that the parent is the right type of formatting object
* repeatable-page-master-alternatives.
* @param parent parent node
* @throws FOPException If the parent is invalid
*/
protected void validateParent(FONode parent) throws FOPException {
if (parent.getName().equals("fo:repeatable-page-master-alternatives")) {
this.repeatablePageMasterAlternatives =
(RepeatablePageMasterAlternatives)parent;
if (getMasterName() == null) {
getLogger().warn("single-page-master-reference"
+ "does not have a master-name and so is being ignored");
} else {
this.repeatablePageMasterAlternatives.addConditionalPageMasterReference(this);
}
} else {
throw new FOPException("fo:conditional-page-master-reference must be child "
+ "of fo:repeatable-page-master-alternatives, not "
+ parent.getName());
}
}
public void acceptVisitor(AddLMVisitor aLMV) {
aLMV.serveConditionalPageMasterReference(this);
}
public String getName() {
return "fo:conditional-page-master-reference";
}
}
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