- /*
- * 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.
- */
-
- /* $Id$ */
-
- 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;
- }
- }
- }
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