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- /*
- * 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 java.awt.Color;
-
- import org.apache.fop.apps.FOUserAgent;
- import org.apache.fop.datatypes.Length;
- import org.apache.fop.datatypes.Numeric;
- import org.apache.fop.datatypes.PercentBaseContext;
- import org.apache.fop.fo.FObj;
- import org.apache.fop.fo.PropertyList;
- import org.apache.fop.fo.expr.PropertyException;
- import org.apache.fop.util.CompareUtil;
-
- /**
- * Class for handling numeric properties
- */
- public final class NumberProperty extends Property implements Numeric {
-
- /**
- * Inner class for making NumberProperty objects
- */
- public static class Maker extends PropertyMaker {
-
- /**
- * Constructor for NumberProperty.Maker
- * @param propId the id of the property for which a Maker should be created
- */
- public Maker(int propId) {
- super(propId);
- }
-
- /**
- * {@inheritDoc}
- */
- public Property convertProperty(Property p,
- PropertyList propertyList, FObj fo)
- throws PropertyException {
- if (p instanceof NumberProperty) {
- return p;
- }
- if (p instanceof EnumProperty) {
- return EnumNumber.getInstance(p);
- }
- Number val = p.getNumber();
- if (val != null) {
- return getInstance(val.doubleValue());
- }
- return convertPropertyDatatype(p, propertyList, fo);
- }
-
- }
-
- /**
- * A positive integer property maker.
- */
- public static class PositiveIntegerMaker extends PropertyMaker {
-
- /**
- * Constructor for NumberProperty.PositiveIntegerMaker
- * @param propId the id of the property for which a PositiveIntegerMaker should be created
- */
- public PositiveIntegerMaker(int propId) {
- super(propId);
- }
-
- /**
- * If the value is not positive, return a property with value 1
- *
- * {@inheritDoc}
- */
- public Property convertProperty(Property p,
- PropertyList propertyList, FObj fo)
- throws PropertyException {
- if (p instanceof EnumProperty) {
- return EnumNumber.getInstance(p);
- }
- Number val = p.getNumber();
- if (val != null) {
- int i = Math.round(val.floatValue());
- if (i <= 0) {
- i = 1;
- }
- return getInstance(i);
- }
- return convertPropertyDatatype(p, propertyList, fo);
- }
-
- }
-
- /** cache holding all canonical NumberProperty instances */
- private static final PropertyCache<NumberProperty> CACHE
- = new PropertyCache<NumberProperty>();
-
- private final Number number;
-
- /**
- * Constructor for double input
- * @param num double numeric value for property
- */
- private NumberProperty(double num) {
- //Store the number as an int or a long,
- //if possible
- if (num == Math.floor(num)) {
- if (num < Integer.MAX_VALUE) {
- this.number = (int) num;
- } else {
- this.number = (long) num;
- }
- } else {
- this.number = num;
- }
- }
-
- /**
- * Constructor for integer input
- * @param num integer numeric value for property
- */
- private NumberProperty(int num) {
- this.number = num;
- }
-
- /**
- * Returns the canonical NumberProperty instance
- * corresponding to the given Number
- * @param num the base Double
- * @return the canonical NumberProperty
- */
- public static NumberProperty getInstance(Double num) {
- return CACHE.fetch(new NumberProperty(num));
- }
-
- /**
- * Returns the canonical NumberProperty instance
- * corresponding to the given Integer
- * @param num the base Integer
- * @return the canonical NumberProperty
- */
- public static NumberProperty getInstance(Integer num) {
- return CACHE.fetch(new NumberProperty(num));
- }
-
- /**
- * Returns the canonical NumberProperty instance
- * corresponding to the given double
- * @param num the base double value
- * @return the canonical NumberProperty
- */
- public static NumberProperty getInstance(double num) {
- return CACHE.fetch(new NumberProperty(num));
- }
-
- /**
- * Returns the canonical NumberProperty instance
- * corresponding to the given int
- * @param num the base int value
- * @return the canonical NumberProperty
- */
- public static NumberProperty getInstance(int num) {
- return CACHE.fetch(new NumberProperty(num));
- }
-
- /**
- * Plain number always has a dimension of 0.
- * @return a dimension of 0.
- */
- public int getDimension() {
- return 0;
- }
-
- /**
- * Return the value of this Numeric.
- * @return The value as a double.
- */
- public double getNumericValue() {
- return number.doubleValue();
- }
-
- /**
- * Return the value of this Numeric.
- * @param context Evaluation context
- * @return The value as a double.
- */
- public double getNumericValue(PercentBaseContext context) {
- return getNumericValue();
- }
-
- /** {@inheritDoc} */
- public int getValue() {
- return number.intValue();
- }
-
- /**
- * Return the value
- * @param context Evaluation context
- * @return The value as an int.
- */
- public int getValue(PercentBaseContext context) {
- return getValue();
- }
-
- /**
- * Return true because all numbers are absolute.
- * @return true.
- */
- public boolean isAbsolute() {
- return true;
- }
-
- /**
- * @return this.number cast as a Number
- */
- public Number getNumber() {
- return this.number;
- }
-
- /**
- * @return this.number cast as an Object
- */
- public Object getObject() {
- return this.number;
- }
-
- /**
- * Convert NumberProperty to Numeric object
- * @return Numeric object corresponding to this
- */
- public Numeric getNumeric() {
- return this;
- }
-
- /** {@inheritDoc} */
- public Length getLength() {
- //Assume pixels (like in HTML) when there's no unit
- return FixedLength.getInstance(getNumericValue(), "px");
- }
-
- /**
- * Convert NumberProperty to a Color. Not sure why this is needed.
- * @param foUserAgent FOUserAgent
- * @return Color that corresponds to black
- */
- public Color getColor(FOUserAgent foUserAgent) {
- // TODO: Implement somehow
- // Convert numeric value to color ???
- // Convert to hexadecimal and then try to make it into a color?
- return Color.black;
- }
-
- /** {@inheritDoc} */
- @Override
- public boolean equals(Object obj) {
- if (this == obj) {
- return true;
- }
- if (!(obj instanceof NumberProperty)) {
- return false;
- }
- NumberProperty other = (NumberProperty) obj;
- return CompareUtil.equal(number, other.number);
- }
-
- /** {@inheritDoc} */
- @Override
- public int hashCode() {
- return number.hashCode();
- }
- }
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