/*
Copyright 2002-2003 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.
*/
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.css.engine.value.ValueManager;
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 1.6 2005/03/27 08:58:31 cam 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
}
}