/*-- $Id: LengthBase.java,v 1.3 2000/12/26 23:37:59 arved Exp $ --
============================================================================
The Apache Software License, Version 1.1
============================================================================
Copyright (C) 1999 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
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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
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(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.datatypes;
import org.apache.fop.fo.FObj;
import org.apache.fop.fo.PropertyList;
import org.apache.fop.messaging.MessageHandler;
public class LengthBase implements PercentBase {
// Standard kinds of percent-based length
public static final int CUSTOM_BASE=0;
public static final int FONTSIZE=1;
public static final int INH_FONTSIZE=2;
public static final int CONTAINING_BOX=3;
public static final int CONTAINING_REFAREA=4;
/**
* FO parent of the FO for which this property is to be calculated.
*/
protected /* final */ FObj parentFO;
/**
* PropertyList for the FO where this property is calculated.
*/
private /* final */ PropertyList propertyList;
/** One of the defined types of LengthBase */
private /* final */ int iBaseType;
public LengthBase(FObj parentFO, PropertyList plist, int iBaseType) {
this.parentFO = parentFO;
this.propertyList = plist;
this.iBaseType = iBaseType;
}
/** Accessor for parentFO object from subclasses which define
* custom kinds of LengthBase calculations.
*/
protected FObj getParentFO() {
return parentFO;
}
/** Accessor for propertyList object from subclasses which define
* custom kinds of LengthBase calculations.
*/
protected PropertyList getPropertyList() {
return propertyList;
}
public int getDimension() { return 1; }
public double getBaseValue() { return 1.0; }
public int getBaseLength() {
switch(iBaseType) {
case FONTSIZE:
return propertyList.get("font-size").getLength().mvalue();
case INH_FONTSIZE:
return propertyList.getInherited("font-size").getLength().mvalue();
case CONTAINING_BOX:
// depends on property?? inline-progression vs block-progression
return parentFO.getContentWidth();
case CONTAINING_REFAREA: // example: start-indent, end-indent
{
FObj fo;
for (fo = parentFO;
fo != null && !fo.generatesReferenceAreas();
fo = fo.getParent())
;
return (fo != null? fo.getContentWidth():0);
}
case CUSTOM_BASE:
MessageHandler.errorln("!!! LengthBase.getBaseLength() called on CUSTOM_BASE type !!!");
return 0;
default:
MessageHandler.errorln("Unknown base type for LengthBase.");
return 0;
}
}
}