/*
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.flex.forks.batik.css.engine.value.svg;
import org.apache.flex.forks.batik.css.engine.CSSEngine;
import org.apache.flex.forks.batik.css.engine.CSSStylableElement;
import org.apache.flex.forks.batik.css.engine.StyleMap;
import org.apache.flex.forks.batik.css.engine.value.ListValue;
import org.apache.flex.forks.batik.css.engine.value.Value;
import org.apache.flex.forks.batik.css.engine.value.ValueManager;
import org.apache.flex.forks.batik.util.CSSConstants;
import org.w3c.flex.forks.css.sac.LexicalUnit;
import org.w3c.dom.DOMException;
import org.w3c.dom.css.CSSValue;
/**
* This class provides a manager for the SVGColor property values.
*
* @author <a href="mailto:stephane@hillion.org">Stephane Hillion</a>
* @version $Id: SVGColorManager.java,v 1.6 2005/03/27 08:58:31 cam Exp $
*/
public class SVGColorManager extends ColorManager {
/**
* The name of the handled property.
*/
protected String property;
/**
* The default value.
*/
protected Value defaultValue;
/**
* Creates a new SVGColorManager.
* The default value is black.
*/
public SVGColorManager(String prop) {
this(prop, SVGValueConstants.BLACK_RGB_VALUE);
}
/**
* Creates a new SVGColorManager.
*/
public SVGColorManager(String prop, Value v) {
property = prop;
defaultValue = v;
}
/**
* Implements {@link ValueManager#isInheritedProperty()}.
*/
public boolean isInheritedProperty() {
return false;
}
/**
* Implements {@link ValueManager#getPropertyName()}.
*/
public String getPropertyName() {
return property;
}
/**
* Implements {@link
* org.apache.flex.forks.batik.css.engine.value.ValueManager#getDefaultValue()}.
*/
public Value getDefaultValue() {
return defaultValue;
}
/**
* Implements {@link ValueManager#createValue(LexicalUnit,CSSEngine)}.
*/
public Value createValue(LexicalUnit lu, CSSEngine engine)
throws DOMException {
if (lu.getLexicalUnitType() == LexicalUnit.SAC_IDENT) {
if (lu.getStringValue().equalsIgnoreCase
(CSSConstants.CSS_CURRENTCOLOR_VALUE)) {
return SVGValueConstants.CURRENTCOLOR_VALUE;
}
}
Value v = super.createValue(lu, engine);
lu = lu.getNextLexicalUnit();
if (lu == null) {
return v;
}
if (lu.getLexicalUnitType() != LexicalUnit.SAC_FUNCTION ||
!lu.getFunctionName().equalsIgnoreCase("icc-color")) {
throw createInvalidLexicalUnitDOMException
(lu.getLexicalUnitType());
}
lu = lu.getParameters();
if (lu.getLexicalUnitType() != LexicalUnit.SAC_IDENT) {
throw createInvalidLexicalUnitDOMException
(lu.getLexicalUnitType());
}
ListValue result = new ListValue(' ');
result.append(v);
ICCColor icc = new ICCColor(lu.getStringValue());
result.append(icc);
lu = lu.getNextLexicalUnit();
while (lu != null) {
if (lu.getLexicalUnitType() != LexicalUnit.SAC_OPERATOR_COMMA) {
throw createInvalidLexicalUnitDOMException
(lu.getLexicalUnitType());
}
lu = lu.getNextLexicalUnit();
if (lu == null) {
throw createInvalidLexicalUnitDOMException((short)-1);
}
icc.append(getColorValue(lu));
lu = lu.getNextLexicalUnit();
}
return result;
}
/**
* 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 == SVGValueConstants.CURRENTCOLOR_VALUE) {
sm.putColorRelative(idx, true);
int ci = engine.getColorIndex();
return engine.getComputedStyle(elt, pseudo, ci);
}
if (value.getCssValueType() == CSSValue.CSS_VALUE_LIST) {
ListValue lv = (ListValue)value;
Value v = lv.item(0);
Value t = super.computeValue(elt, pseudo, engine, idx, sm, v);
if (t != v) {
ListValue result = new ListValue(' ');
result.append(t);
result.append(lv.item(1));
return result;
}
return value;
}
return super.computeValue(elt, pseudo, engine, idx, sm, value);
}
/**
* Creates a float value usable as a component of an RGBColor.
*/
protected float getColorValue(LexicalUnit lu) {
switch (lu.getLexicalUnitType()) {
case LexicalUnit.SAC_INTEGER:
return lu.getIntegerValue();
case LexicalUnit.SAC_REAL:
return lu.getFloatValue();
}
throw createInvalidLexicalUnitDOMException(lu.getLexicalUnitType());
}
}