org.foray.fotree.value
Class DtShape

java.lang.Object
  org.foray.fotree.value.Expr
      org.foray.fotree.value.ExprAdditive
          org.foray.fotree.value.ExprMultiplicative
              org.foray.fotree.value.ExprUnary
                  org.foray.fotree.value.ExprPrimary
                      org.foray.fotree.value.Datatype
                          org.foray.fotree.value.DtShape

All Implemented Interfaces:

PropertyValue

Direct Known Subclasses:

DtRectangle

public abstract class DtShape
extends Datatype

A "shape" datatype in XSL. Note that such shapes in CSS and XSL-FO are defined relative to some other shape. This datatype is not specifically listed among the datatypes in the XSL-FO Standard 1.0, at Section 5.11. However, it is described at Section 7.20.1, and in the CSS 2.1 Specification at 11.1.2 and other places.

Field Summary

Fields inherited from class org.foray.fotree.value.Expr

OPERATION_ADD, OPERATION_DIVIDE, OPERATION_MOD, OPERATION_MULTIPLY, OPERATION_NEGATION, OPERATION_SUBTRACT, UNIT_POWER_AREA, UNIT_POWER_LENGTH, UNIT_POWER_NON_NUMERIC, UNIT_POWER_NUMERIC

Constructor Summary

DtShape()

Method Summary

abstract Shape	computeShape(Shape inputShape, int pointSize) Computes the shape described by this.
static DtShape	makeShapeDT(String input) Tries to construct an instance of each of the subclasses, returning the instance if successful, or trying the next option if not.

Methods inherited from class org.foray.fotree.value.Datatype

convertValueToFoValue

Methods inherited from class org.foray.fotree.value.Expr

evalColorException, evalIntegerException, evalKeywordException, evalLengthException, evalNumericException, evalPercentageException

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.foray.fotree.value.PropertyValue

canEvalColor, canEvalInteger, canEvalKeyword, canEvalLength, canEvalNumeric, canEvalPercentage, evalColor, evalInteger, evalKeyword, evalLength, evalNumeric, evalPercentage, getUnitPower, lengthRequiresFontSize

Constructor Detail

DtShape

public DtShape()

Method Detail

makeShapeDT

public static DtShape makeShapeDT(String input)

Tries to construct an instance of each of the subclasses, returning the instance if successful, or trying the next option if not.

Parameters:

input - The String containing the shape information to be parsed.

Returns:

The ShapeDT subclass instance if one is found, or null if one is not.

computeShape

public abstract Shape computeShape(Shape inputShape,
                                   int pointSize)

Computes the shape described by this.

Parameters:

inputShape - The shape to which the computed (returned) shape is relative. All encapsulated dimensions are expressed in millipoints. CSS and XSL-FO shapes are defined as offsets to other shapes, and the exact dimensions of those shapes are not necessarily known as the data item is parsed, so the actual shape must be passed in here.

pointSize - The font size.

Returns:

The computed shape defined by this. All dimensions are in millipoints, regardless of the implementation of Shape that is used.