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- /*
- * 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 PPColWidthFunction extends FunctionBase {
-
- /** {@inheritDoc} */
- public int getRequiredArgsCount() {
- return 1;
- }
-
- @Override
- /** {@inheritDoc} */
- public PercentBase getPercentBase() {
- return new PPColWidthPercentBase();
- }
-
- /** {@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 PPColWidthPercentBase 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;
- }
-
- }
- }
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