| /* |
| * 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.Numeric; |
| import org.apache.fop.datatypes.Length; |
| import org.apache.fop.datatypes.LengthBase; |
| import org.apache.fop.fo.Constants; |
| import org.apache.fop.fo.PropertyList; |
| import org.apache.fop.fo.flow.ListItem; |
| import org.apache.fop.fo.properties.PercentLength; |
| import org.apache.fop.fo.properties.Property; |
| |
| /** |
| * Class modelling the label-end Property Value function. See Sec. 5.10.4 of the |
| * XSL-FO spec. |
| */ |
| public class LabelEndFunction extends FunctionBase { |
| |
| /** |
| * @return 0 (the number of arguments required for the label-end function) |
| */ |
| public int nbArgs() { |
| return 0; |
| } |
| |
| /** |
| * |
| * @param args array of arguments for the function (none are needed, but |
| * required for the Function interface) |
| * @param pInfo PropertyInfo object for the function |
| * @return the calculated label-end value for the list |
| * @throws PropertyException if called from outside of an fo:list-item |
| */ |
| public Property eval(Property[] args, |
| PropertyInfo pInfo) throws PropertyException { |
| |
| Length distance = pInfo.getPropertyList().get( |
| Constants.PR_PROVISIONAL_DISTANCE_BETWEEN_STARTS).getLength(); |
| Length separation = pInfo.getPropertyList().getNearestSpecified( |
| Constants.PR_PROVISIONAL_LABEL_SEPARATION).getLength(); |
| |
| PropertyList pList = pInfo.getPropertyList(); |
| while (pList != null && !(pList.getFObj() instanceof ListItem)) { |
| pList = pList.getParentPropertyList(); |
| } |
| if (pList == null) { |
| throw new PropertyException("label-end() called from outside an fo:list-item"); |
| } |
| Length startIndent = pList.get(Constants.PR_START_INDENT).getLength(); |
| |
| LengthBase base = new LengthBase(pInfo.getPropertyList(), |
| LengthBase.CONTAINING_REFAREA_WIDTH); |
| PercentLength refWidth = new PercentLength(1.0, base); |
| |
| Numeric labelEnd = distance; |
| labelEnd = NumericOp.addition(labelEnd, startIndent); |
| //TODO add start-intrusion-adjustment |
| labelEnd = NumericOp.subtraction(labelEnd, separation); |
| |
| labelEnd = NumericOp.subtraction(refWidth, labelEnd); |
| |
| return (Property) labelEnd; |
| } |
| |
| } |