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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.pagination;
// XML
import org.xml.sax.Locator;
import org.apache.fop.apps.FOPException;
import org.apache.fop.fo.FONode;
import org.apache.fop.fo.FObj;
import org.apache.fop.fo.PropertyList;
import org.apache.fop.fo.ValidationException;
/**
* 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 {
// The value of properties relevant for fo:conditional-page-master-reference.
private String masterReference;
private int pagePosition;
private int oddOrEven;
private int blankOrNotBlank;
// End of property values
/**
* @see org.apache.fop.fo.FONode#FONode(FONode)
*/
public ConditionalPageMasterReference(FONode parent) {
super(parent);
}
/**
* @see org.apache.fop.fo.FObj#bind(PropertyList)
*/
public void bind(PropertyList pList) throws FOPException {
masterReference = pList.get(PR_MASTER_REFERENCE).getString();
pagePosition = pList.get(PR_PAGE_POSITION).getEnum();
oddOrEven = pList.get(PR_ODD_OR_EVEN).getEnum();
blankOrNotBlank = pList.get(PR_BLANK_OR_NOT_BLANK).getEnum();
if (masterReference == null || masterReference.equals("")) {
missingPropertyError("master-reference");
}
}
/**
* @see org.apache.fop.fo.FONode#startOfNode
*/
protected void startOfNode() throws FOPException {
getConcreteParent().addConditionalPageMasterReference(this);
}
private RepeatablePageMasterAlternatives getConcreteParent() {
return (RepeatablePageMasterAlternatives) 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 ValidationException {
invalidChildError(loc, nsURI, localName);
}
/**
* 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 == EN_REST) {
return false;
} else if (pagePosition == EN_LAST) {
// ?? how can one know at this point?
getLogger().debug("LAST PagePosition NYI");
return false;
}
} else {
if (pagePosition == EN_FIRST) {
return false;
} else if (pagePosition == EN_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 == EN_EVEN) {
return false;
}
} else {
if (oddOrEven == EN_ODD) {
return false;
}
}
// blank-or-not-blank
if (isBlankPage) {
if (blankOrNotBlank == EN_NOT_BLANK) {
return false;
}
} else {
if (blankOrNotBlank == EN_BLANK) {
return false;
}
}
return true;
}
/**
* Returns the "master-reference" property.
*/
public String getMasterReference() {
return masterReference;
}
/**
* @see org.apache.fop.fo.FObj#getName()
*/
public String getName() {
return "fo:conditional-page-master-reference";
}
/**
* @see org.apache.fop.fo.FObj#getNameId()
*/
public int getNameId() {
return FO_CONDITIONAL_PAGE_MASTER_REFERENCE;
}
}
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