/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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: RGBNamedColorFunction.java 1328964 2012-04-22 20:09:49Z gadams $ */
package org.apache.fop.fo.expr;
import org.apache.fop.datatypes.PercentBase;
import org.apache.fop.datatypes.PercentBaseContext;
import org.apache.fop.fo.pagination.ColorProfile;
import org.apache.fop.fo.pagination.Declarations;
import org.apache.fop.fo.properties.ColorProperty;
import org.apache.fop.fo.properties.Property;
/**
* Implements the rgb-named-color() function.
* @since XSL-FO 2.0
*/
class RGBNamedColorFunction extends FunctionBase {
/** {@inheritDoc} */
public int getRequiredArgsCount() {
return 5;
}
/** {@inheritDoc} */
@Override
public PercentBase getPercentBase() {
return new RGBNamedPercentBase();
}
/** {@inheritDoc} */
public Property eval(Property[] args, PropertyInfo pInfo) throws PropertyException {
// Map color profile NCNAME to src from declarations/color-profile element
String colorProfileName = args[3].getString();
String colorName = args[4].getString();
Declarations decls = (pInfo.getFO() != null
? pInfo.getFO().getRoot().getDeclarations()
: null);
ColorProfile cp = null;
if (decls != null) {
cp = decls.getColorProfile(colorProfileName);
}
if (cp == null) {
PropertyException pe = new PropertyException("The " + colorProfileName
+ " color profile was not declared");
pe.setPropertyInfo(pInfo);
throw pe;
}
float red = 0;
float green = 0;
float blue = 0;
red = args[0].getNumber().floatValue();
green = args[1].getNumber().floatValue();
blue = args[2].getNumber().floatValue();
/* Verify rgb replacement arguments */
if ((red < 0 || red > 255)
|| (green < 0 || green > 255)
|| (blue < 0 || blue > 255)) {
throw new PropertyException("sRGB color values out of range. "
+ "Arguments to rgb-named-color() must be [0..255] or [0%..100%]");
}
// rgb-named-color is replaced with fop-rgb-named-color which has an extra argument
// containing the color profile src attribute as it is defined in the color-profile
// declarations element.
StringBuffer sb = new StringBuffer();
sb.append("fop-rgb-named-color(");
sb.append(red / 255f);
sb.append(',').append(green / 255f);
sb.append(',').append(blue / 255f);
sb.append(',').append(colorProfileName);
sb.append(',').append(cp.getSrc());
sb.append(", '").append(colorName).append('\'');
sb.append(")");
return ColorProperty.getInstance(pInfo.getUserAgent(), sb.toString());
}
private static final class RGBNamedPercentBase implements PercentBase {
/** {@inheritDoc} */
public int getBaseLength(PercentBaseContext context) throws PropertyException {
return 0;
}
/** {@inheritDoc} */
public double getBaseValue() {
return 255f;
}
/** {@inheritDoc} */
public int getDimension() {
return 0;
}
}
}