/*****************************************************************************
* Copyright (C) The Apache Software Foundation. All rights reserved. *
* ------------------------------------------------------------------------- *
* This software is published under the terms of the Apache Software License *
* version 1.1, a copy of which has been included with this distribution in *
* the LICENSE file. *
*****************************************************************************/
package org.apache.batik.css.engine.value.svg;
import org.apache.batik.css.engine.CSSEngine;
import org.apache.batik.css.engine.CSSStylableElement;
import org.apache.batik.css.engine.StyleMap;
import org.apache.batik.css.engine.value.FloatValue;
import org.apache.batik.css.engine.value.LengthManager;
import org.apache.batik.css.engine.value.StringMap;
import org.apache.batik.css.engine.value.Value;
import org.apache.batik.util.CSSConstants;
import org.w3c.css.sac.LexicalUnit;
import org.w3c.dom.DOMException;
import org.w3c.dom.css.CSSPrimitiveValue;
/**
* This class provides a manager for the 'baseline-shift' property values.
*
* @author <a href="mailto:stephane@hillion.org">Stephane Hillion</a>
* @version $Id: BaselineShiftManager.java,v 1.3 2003/04/11 13:55:53 vhardy Exp $
*/
public class BaselineShiftManager extends LengthManager {
/**
* The identifier values.
*/
protected final static StringMap values = new StringMap();
static {
values.put(CSSConstants.CSS_BASELINE_VALUE,
SVGValueConstants.BASELINE_VALUE);
values.put(CSSConstants.CSS_SUB_VALUE,
SVGValueConstants.SUB_VALUE);
values.put(CSSConstants.CSS_SUPER_VALUE,
SVGValueConstants.SUPER_VALUE);
}
/**
* Implements {@link ValueManager#isInheritedProperty()}.
*/
public boolean isInheritedProperty() {
return false;
}
/**
* Implements {@link ValueManager#getPropertyName()}.
*/
public String getPropertyName() {
return CSSConstants.CSS_BASELINE_SHIFT_PROPERTY;
}
/**
* Implements {@link ValueManager#getDefaultValue()}.
*/
public Value getDefaultValue() {
return SVGValueConstants.BASELINE_VALUE;
}
/**
* Implements {@link ValueManager#createValue(LexicalUnit,CSSEngine)}.
*/
public Value createValue(LexicalUnit lu, CSSEngine engine)
throws DOMException {
switch (lu.getLexicalUnitType()) {
case LexicalUnit.SAC_INHERIT:
return SVGValueConstants.INHERIT_VALUE;
case LexicalUnit.SAC_IDENT:
Object v = values.get(lu.getStringValue().toLowerCase().intern());
if (v == null) {
throw createInvalidIdentifierDOMException(lu.getStringValue());
}
return (Value)v;
}
return super.createValue(lu, engine);
}
/**
* Implements {@link ValueManager#createStringValue(short,String,CSSEngine)}.
*/
public Value createStringValue(short type, String value, CSSEngine engine)
throws DOMException {
if (type != CSSPrimitiveValue.CSS_IDENT) {
throw createInvalidIdentifierDOMException(value);
}
Object v = values.get(value.toLowerCase().intern());
if (v == null) {
throw createInvalidIdentifierDOMException(value);
}
return (Value)v;
}
/**
* Implements {@link
* ValueManager#computeValue(CSSStylableElement,String,CSSEngine,int,StyleMap,Value)}.
*/
public Value computeValue(CSSStylableElement elt,
String pseudo,
CSSEngine engine,
int idx,
StyleMap sm,
Value value) {
if (value.getPrimitiveType() == CSSPrimitiveValue.CSS_PERCENTAGE) {
sm.putLineHeightRelative(idx, true);
int fsi = engine.getLineHeightIndex();
CSSStylableElement parent;
parent = (CSSStylableElement)elt.getParentNode();
if (parent == null) {
// Hmmm somthing pretty odd - can't happen accordint to spec,
// should always have text parent.
// http://www.w3.org/TR/SVG11/text.html#BaselineShiftProperty
parent = elt;
}
Value fs = engine.getComputedStyle(parent, pseudo, fsi);
float fsv = fs.getFloatValue();
float v = value.getFloatValue();
return new FloatValue(CSSPrimitiveValue.CSS_NUMBER,
(fsv * v) / 100f);
}
return super.computeValue(elt, pseudo, engine, idx, sm, value);
}
/**
* Indicates the orientation of the property associated with
* this manager.
*/
protected int getOrientation() {
return BOTH_ORIENTATION; // Not used
}
}