| /* |
| * 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.datatypes; |
| |
| import org.apache.fop.fo.expr.PropertyException; |
| |
| /** |
| * Interface for objects that can be used as base objects for percentage |
| * computations |
| */ |
| public interface PercentBase { |
| |
| /** |
| * Determines whether a numeric property is created or one with a percentage |
| * base. |
| * @return 0 for length, 1 for percentage |
| */ |
| int getDimension(); |
| |
| /** |
| * @return the base value (this will be used as the base to which a percentage will be |
| * applied to compute the length of the referencing item) |
| */ |
| double getBaseValue(); |
| |
| /** |
| * @param context The context for percentage evaluation |
| * @return the integer size in millipoints of the object (this will be used |
| * as the base to which a percentage will be applied to compute the length |
| * of the referencing item) |
| * @throws PropertyException if a problem occurs during evaluation of this |
| * value. |
| */ |
| int getBaseLength(PercentBaseContext context) throws PropertyException; |
| |
| } |