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- /*
- * $Id$
- * ============================================================================
- * The Apache Software License, Version 1.1
- * ============================================================================
- *
- * Copyright (C) 1999-2004 The Apache Software Foundation. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without modifica-
- * tion, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- *
- * 3. The end-user documentation included with the redistribution, if any, must
- * include the following acknowledgment: "This product includes software
- * developed by the Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself, if
- * and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "FOP" and "Apache Software Foundation" must not be used to
- * endorse or promote products derived from this software without prior
- * written permission. For written permission, please contact
- * apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache", nor may
- * "Apache" appear in their name, without prior written permission of the
- * Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
- * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
- * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
- * DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * ============================================================================
- *
- * This software consists of voluntary contributions made by many individuals
- * on behalf of the Apache Software Foundation and was originally created by
- * James Tauber <jtauber@jtauber.com>. For more information on the Apache
- * Software Foundation, please see <http://www.apache.org/>.
- */
- package org.apache.fop.fo.properties;
-
- import org.apache.fop.apps.FOPException;
- import org.apache.fop.fo.FObj;
- import org.apache.fop.fo.PropertyList;
-
- /**
- */
- public class CorrespondingPropertyMaker {
- protected PropertyMaker baseMaker;
- protected int lr_tb;
- protected int rl_tb;
- protected int tb_rl;
- private boolean useParent;
- private boolean relative;
-
- public CorrespondingPropertyMaker(PropertyMaker baseMaker) {
- this.baseMaker = baseMaker;
- baseMaker.setCorresponding(this);
- }
-
-
- public void setCorresponding(int lr_tb, int rl_tb, int tb_rl) {
- this.lr_tb = lr_tb;
- this.rl_tb = rl_tb;
- this.tb_rl = tb_rl;
- }
-
- public void setUseParent(boolean useParent) {
- this.useParent = useParent;
- }
-
- public void setRelative(boolean relative) {
- this.relative = relative;
- }
-
- /**
- * For properties that operate on a relative direction (before, after,
- * start, end) instead of an absolute direction (top, bottom, left,
- * right), this method determines whether a corresponding property
- * is specified on the corresponding absolute direction. For example,
- * the border-start-color property in a lr-tb writing-mode specifies
- * the same thing that the border-left-color property specifies. In this
- * example, if the Maker for the border-start-color property is testing,
- * and if the border-left-color is specified in the properties,
- * this method should return true.
- * @param propertyList collection of properties to be tested
- * @return true iff 1) the property operates on a relative direction,
- * AND 2) the property has a corresponding property on an absolute
- * direction, AND 3) the corresponding property on that absolute
- * direction has been specified in the input properties
- */
- public boolean isCorrespondingForced(PropertyList propertyList) {
- if (!relative) {
- return false;
- }
- PropertyList pList;
- if (useParent) {
- pList = propertyList.getParentFObj().propertyList;
- } else {
- pList = propertyList;
- }
- int correspondingId = pList.wmMap(lr_tb, rl_tb, tb_rl);
- if (propertyList.getExplicit(correspondingId) != null)
- return true;
- return false;
- }
-
- /**
- * Return a Property object representing the value of this property,
- * based on other property values for this FO.
- * A special case is properties which inherit the specified value,
- * rather than the computed value.
- * @param propertyList The PropertyList for the FO.
- * @return Property A computed Property value or null if no rules
- * are specified (in foproperties.xml) to compute the value.
- * @throws FOPException for invalid or inconsistent FO input
- */
- public Property compute(PropertyList propertyList) throws FOPException {
- PropertyList pList;
- if (useParent) {
- pList = propertyList.getParentPropertyList();
- if (pList == null) {
- return null;
- }
- } else {
- pList = propertyList;
- }
- int correspondingId = pList.wmMap(lr_tb, rl_tb, tb_rl);
-
- Property p = propertyList.getExplicitOrShorthand(correspondingId);
- if (p != null) {
- FObj parentFO = propertyList.getParentFObj();
- p = baseMaker.convertProperty(p, propertyList, parentFO);
- }
- return p;
- }
- }
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