| /* |
| * 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.PropertyList; |
| import org.apache.fop.fo.flow.table.Table; |
| import org.apache.fop.fo.properties.Property; |
| import org.apache.fop.fo.properties.TableColLength; |
| |
| /** |
| * Class modelling the proportional-column-width function. See Sec. 5.10.4 of |
| * the XSL-FO standard. |
| */ |
| public class ProportionalColumnWidthFunction extends FunctionBase { |
| |
| /** {@inheritDoc} */ |
| public int getRequiredArgsCount() { |
| return 1; |
| } |
| |
| @Override |
| /** {@inheritDoc} */ |
| public PercentBase getPercentBase() { |
| return new ProportionalColumnWidthPercentBase(); |
| } |
| |
| /** {@inheritDoc} */ |
| public Property eval(Property[] args, PropertyInfo pInfo) throws PropertyException { |
| Number d = args[0].getNumber(); |
| if (d == null) { |
| throw new PropertyException("Non numeric operand to " |
| + "proportional-column-width() function."); |
| } |
| PropertyList pList = pInfo.getPropertyList(); |
| if (!"fo:table-column".equals(pList.getFObj().getName())) { |
| throw new PropertyException("proportional-column-width() function " |
| + "may only be used on fo:table-column."); |
| } |
| |
| Table t = (Table) pList.getParentFObj(); |
| if (t.isAutoLayout()) { |
| throw new PropertyException("proportional-column-width() function " |
| + "may only be used when fo:table has " |
| + "table-layout=\"fixed\"."); |
| } |
| return new TableColLength(d.doubleValue(), pInfo.getFO()); |
| } |
| |
| private static class ProportionalColumnWidthPercentBase implements PercentBase { |
| |
| /** {@inheritDoc} */ |
| public int getBaseLength(PercentBaseContext context) throws PropertyException { |
| return 0; |
| } |
| |
| /** {@inheritDoc} */ |
| public double getBaseValue() { |
| //make sure percentage-arguments are interpreted |
| //as numerics (1% = 1 * 0.01) |
| return 1; |
| } |
| |
| /** {@inheritDoc} */ |
| public int getDimension() { |
| return 0; |
| } |
| |
| } |
| } |