| /* |
| * 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; |
| } |
| } |
| } |