org.apache.fop.fo.properties
Class LineHeightPropertyMaker

java.lang.Object
  org.apache.fop.fo.properties.PropertyMaker
      org.apache.fop.fo.properties.CompoundPropertyMaker
          org.apache.fop.fo.properties.SpaceProperty.Maker
              org.apache.fop.fo.properties.LineHeightPropertyMaker

All Implemented Interfaces:

java.lang.Cloneable

public class LineHeightPropertyMaker
extends SpaceProperty.Maker

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.

Field Summary

Fields inherited from class org.apache.fop.fo.properties.PropertyMaker

contextDep, corresponding, defaultProperty, defaultValue, propId, setByShorthand

Constructor Summary

LineHeightPropertyMaker(int propId)
Create a maker for line-height.

Method Summary

protected Property	compute(PropertyList propertyList) Recalculate the line-height value based on the nearest specified value.
Property	convertProperty(Property p, PropertyList propertyList, FObj fo) Return a Property object based on the passed Property object.
Property	make(PropertyList propertyList, java.lang.String value, FObj fo) Create a Property object from an attribute specification.

Methods inherited from class org.apache.fop.fo.properties.SpaceProperty.Maker

makeNewProperty

Methods inherited from class org.apache.fop.fo.properties.CompoundPropertyMaker

addSubpropMaker, checkEnumValues, get, getSubpropMaker, make, make, makeCompound, useGeneric

Methods inherited from class org.apache.fop.fo.properties.PropertyMaker

addEnum, addKeyword, addShorthand, checkValueKeywords, clone, convertPropertyDatatype, convertShorthandProperty, findProperty, getName, getPercentBase, getPropId, getShorthand, getSubprop, isInherited, setByShorthand, setCorresponding, setDatatypeParser, setDefault, setDefault, setInherited, setPercentBase, setSubprop

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

LineHeightPropertyMaker

public LineHeightPropertyMaker(int propId)

Create a maker for line-height.

Parameters:

propId - the is for linehight.

Method Detail

make

public Property make(PropertyList propertyList,
                     java.lang.String value,
                     FObj fo)
              throws PropertyException

Create a Property object from an attribute specification.

Overrides:

make in class CompoundPropertyMaker

Parameters:

propertyList - The PropertyList object being built for this FO.

value - The attribute value.

fo - The parent FO for the FO whose property is being made.

Returns:

The initialized Property object.

Throws:

PropertyException - for invalid or inconsistent FO input

compute

protected Property compute(PropertyList propertyList)
                    throws PropertyException

Recalculate the line-height value based on the nearest specified value. Return a Property object representing the value of this property, based on other property values for this FO. A special case is properties which inherit the specified value, rather than the computed value.

Overrides:

compute in class PropertyMaker

Parameters:

propertyList - The PropertyList for the FO.

Returns:

Property A computed Property value or null if no rules are specified to compute the value.

Throws:

PropertyException - for invalid or inconsistent FO input

convertProperty

public Property convertProperty(Property p,
                                PropertyList propertyList,
                                FObj fo)
                         throws PropertyException

Return a Property object based on the passed Property object. This method is called if the Property object built by the parser isn't the right type for this compound property.

Overrides:

convertProperty in class SpaceProperty.Maker

Parameters:

p - The Property object return by the expression parser

propertyList - The PropertyList object being built for this FO.

fo - The parent FO for the FO whose property is being made.

Returns:

A Property of the correct type or null if the parsed value can't be converted to the correct type.

Throws:

PropertyException - for invalid or inconsistent FO input