| /* |
| * 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.properties; |
| |
| import org.apache.fop.datatypes.Length; |
| import org.apache.fop.datatypes.LengthBase; |
| import org.apache.fop.datatypes.Numeric; |
| import org.apache.fop.fo.Constants; |
| import org.apache.fop.fo.FObj; |
| import org.apache.fop.fo.PropertyList; |
| import org.apache.fop.fo.expr.PropertyException; |
| |
| /** |
| * A maker which calculates the line-height property. |
| * This property maker is special because line-height inherits the specified |
| * value, instead of the computed value. |
| * So when a line-height is create based on an attribute, the specified value |
| * is stored in the property and in compute() the stored specified value of |
| * the nearest specified is used to recalculate the line-height. |
| */ |
| |
| public class LineHeightPropertyMaker extends SpaceProperty.Maker { |
| /** |
| * Create a maker for line-height. |
| * @param propId the is for linehight. |
| */ |
| public LineHeightPropertyMaker(int propId) { |
| super(propId); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public Property make(PropertyList propertyList, String value, FObj fo) |
| throws PropertyException { |
| /* if value was specified as a number/length/percentage then |
| * conditionality and precedence components are overridden |
| */ |
| Property p = super.make(propertyList, value, fo); |
| p.getSpace().setConditionality( |
| EnumProperty.getInstance(Constants.EN_RETAIN, "RETAIN"), true); |
| p.getSpace().setPrecedence( |
| EnumProperty.getInstance(Constants.EN_FORCE, "FORCE"), true); |
| return p; |
| } |
| |
| /** |
| * Recalculate the line-height value based on the nearest specified |
| * value. |
| * {@inheritDoc} |
| */ |
| protected Property compute(PropertyList propertyList) throws PropertyException { |
| // recalculate based on last specified value |
| // Climb up propertylist and find last spec'd value |
| Property specProp = propertyList.getNearestSpecified(propId); |
| if (specProp != null) { |
| String specVal = specProp.getSpecifiedValue(); |
| if (specVal != null) { |
| return make(propertyList, specVal, |
| propertyList.getParentFObj()); |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public Property convertProperty(Property p, |
| PropertyList propertyList, |
| FObj fo) throws PropertyException { |
| Numeric numval = p.getNumeric(); |
| if (numval != null && numval.getDimension() == 0) { |
| if (getPercentBase(propertyList) instanceof LengthBase) { |
| Length base = ((LengthBase)getPercentBase(propertyList)).getBaseLength(); |
| if (base != null && base.isAbsolute()) { |
| p = FixedLength.getInstance( |
| numval.getNumericValue() * base.getNumericValue()); |
| } else { |
| p = new PercentLength( |
| numval.getNumericValue(), getPercentBase(propertyList)); |
| } |
| } |
| Property spaceProp = super.convertProperty(p, propertyList, fo); |
| spaceProp.setSpecifiedValue(String.valueOf(numval.getNumericValue())); |
| return spaceProp; |
| } |
| return super.convertProperty(p, propertyList, fo); |
| } |
| } |