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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;
import java.awt.Rectangle;
import org.xml.sax.Locator;
import org.apache.fop.apps.FOPException;
import org.apache.fop.datatypes.FODimension;
import org.apache.fop.datatypes.Numeric;
import org.apache.fop.fo.FONode;
import org.apache.fop.fo.FObj;
import org.apache.fop.fo.PropertyList;
import org.apache.fop.fo.ValidationException;
import org.apache.fop.fo.expr.PropertyException;
import org.apache.fop.fo.properties.CommonBorderPaddingBackground;
/**
* This is an abstract base class for pagination regions
*/
public abstract class Region extends FObj {
// The value of properties relevant for fo:region
private CommonBorderPaddingBackground commonBorderPaddingBackground;
// private ToBeImplementedProperty clip
private int displayAlign;
private int overflow;
private String regionName;
private Numeric referenceOrientation;
private int writingMode;
// End of property values
private SimplePageMaster layoutMaster;
/**
* @see org.apache.fop.fo.FONode#FONode(FONode)
*/
protected Region(FONode parent) {
super(parent);
layoutMaster = (SimplePageMaster) parent;
}
/**
* @see org.apache.fop.fo.FObj#bind(PropertyList)
*/
public void bind(PropertyList pList) throws FOPException {
commonBorderPaddingBackground = pList.getBorderPaddingBackgroundProps();
// clip = pList.get(PR_CLIP);
displayAlign = pList.get(PR_DISPLAY_ALIGN).getEnum();
overflow = pList.get(PR_OVERFLOW).getEnum();
regionName = pList.get(PR_REGION_NAME).getString();
referenceOrientation = pList.get(PR_REFERENCE_ORIENTATION).getNumeric();
writingMode = pList.getWritingMode();
// regions may have name, or default
if (regionName.equals("")) {
regionName = getDefaultRegionName();
} else {
// check that name is OK. Not very pretty.
if (isReserved(getRegionName())
&& !getRegionName().equals(getDefaultRegionName())) {
throw new ValidationException("region-name '" + regionName
+ "' for " + this.getName()
+ " is not permitted.", locator);
}
}
//TODO do we need context for getBPPaddingAndBorder() and getIPPaddingAndBorder()?
if (getUserAgent().validateStrictly()
&& (getCommonBorderPaddingBackground().getBPPaddingAndBorder(false, null) != 0
|| getCommonBorderPaddingBackground().getIPPaddingAndBorder(false, null) != 0)) {
throw new PropertyException("Border and padding for region \""
+ regionName + "\" must be '0' (See 6.4.13 in XSL 1.0).");
}
}
/**
* @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);
}
/**
* @param pageRefRect reference dimension of the page area.
* @param spm the simple page master this region belongs to.
* @return the rectangle for the viewport area
*/
public abstract Rectangle getViewportRectangle(FODimension pageRefRect
, SimplePageMaster spm);
/**
* Returns the default region name (xsl-region-before, xsl-region-start,
* etc.)
* @return the default region name
*/
protected abstract String getDefaultRegionName();
/**
* Checks to see if a given region name is one of the reserved names
*
* @param name a region name to check
* @return true if the name parameter is a reserved region name
*/
protected boolean isReserved(String name) /*throws FOPException*/ {
return (name.equals("xsl-region-before")
|| name.equals("xsl-region-start")
|| name.equals("xsl-region-end")
|| name.equals("xsl-region-after")
|| name.equals("xsl-before-float-separator")
|| name.equals("xsl-footnote-separator"));
}
/**
* @see org.apache.fop.fo.FObj#generatesReferenceAreas()
*/
public boolean generatesReferenceAreas() {
return true;
}
/**
* Returns a sibling region for this region.
* @param regionId the Constants ID of the FO representing the region
* @return the requested region
*/
protected Region getSiblingRegion(int regionId) {
// Ask parent for region
return layoutMaster.getRegion(regionId);
}
/**
* @return the Background Properties (border and padding are not used here).
*/
public CommonBorderPaddingBackground getCommonBorderPaddingBackground() {
return commonBorderPaddingBackground;
}
/** @return the "region-name" property. */
public String getRegionName() {
return regionName;
}
/** @return the "writing-mode" property. */
public int getWritingMode() {
return writingMode;
}
/** @return the "overflow" property. */
public int getOverflow() {
return overflow;
}
/** @return the display-align property. */
public int getDisplayAlign() {
return displayAlign;
}
/** @return the "reference-orientation" property. */
public int getReferenceOrientation() {
return referenceOrientation.getValue();
}
}
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