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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.traits;
-
- import org.apache.fop.datatypes.PercentBaseContext;
- import org.apache.fop.fo.Constants;
- import org.apache.fop.fo.properties.Property;
- import org.apache.fop.fo.properties.SpaceProperty;
- import org.apache.fop.fonts.Font;
-
- /**
- * Store a single Space property value in simplified form, with all
- * Length values resolved. See section 4.3 in the specs.
- */
- public class SpaceVal {
-
- private final MinOptMax space;
- private final boolean conditional;
- private final boolean forcing;
- private final int precedence; // Numeric only, if forcing, set to 0
-
- /**
- * Constructor for SpaceVal objects based on Space objects.
- * @param spaceprop Space object to use
- * @param context Percentage evaluation context
- */
- public SpaceVal(SpaceProperty spaceprop, PercentBaseContext context) {
- space = createSpaceProperty(spaceprop, context);
- conditional = (spaceprop.getConditionality().getEnum() == Constants.EN_DISCARD);
- Property precProp = spaceprop.getPrecedence();
- if (precProp.getNumber() != null) {
- precedence = precProp.getNumber().intValue();
- forcing = false;
- } else {
- forcing = (precProp.getEnum() == Constants.EN_FORCE);
- precedence = 0;
- }
- }
-
- private static MinOptMax createSpaceProperty(SpaceProperty spaceprop,
- PercentBaseContext context) {
- int min = spaceprop.getMinimum(context).getLength().getValue(context);
- int opt = spaceprop.getOptimum(context).getLength().getValue(context);
- int max = spaceprop.getMaximum(context).getLength().getValue(context);
- // if a value is not set defaults to zero
- if (min > max && max == 0) {
- max = opt > min ? opt : min;
- }
- if (min > opt && opt == 0) {
- opt = (min + max) / 2;
- }
- if (opt > max && max == 0) {
- max = opt;
- }
- return MinOptMax.getInstance(min, opt, max);
- }
-
- /**
- * Constructor for SpaceVal objects based on the full set of properties.
- * @param space space to use
- * @param conditional Conditionality value
- * @param forcing Forcing value
- * @param precedence Precedence value
- */
- public SpaceVal(MinOptMax space, boolean conditional, boolean forcing, int precedence) {
- this.space = space;
- this.conditional = conditional;
- this.forcing = forcing;
- this.precedence = precedence;
- }
-
- /**
- * @param wordSpacing property
- * @param letterSpacing space value
- * @param fs font
- * @return space value
- */
- public static SpaceVal makeWordSpacing(Property wordSpacing, SpaceVal letterSpacing, Font fs) {
- if (wordSpacing.getEnum() == Constants.EN_NORMAL) {
- // give word spaces the possibility to shrink by a third,
- // and stretch by a half;
- int spaceCharIPD = fs.getCharWidth(' ');
- MinOptMax space = MinOptMax.getInstance(-spaceCharIPD / 3, 0, spaceCharIPD / 2);
- //TODO Adding 2 letter spaces here is not 100% correct. Spaces don't have letter spacing
- return new SpaceVal(space.plus(letterSpacing.getSpace().mult(2)), true, true, 0);
- } else {
- return new SpaceVal(wordSpacing.getSpace(), null);
- }
- }
-
- /**
- * @param letterSpacing property
- * @return space value
- */
- public static SpaceVal makeLetterSpacing(Property letterSpacing) {
- if (letterSpacing.getEnum() == Constants.EN_NORMAL) {
- // letter spaces are set to zero (or use different values?)
- return new SpaceVal(MinOptMax.ZERO, true, true, 0);
- } else {
- return new SpaceVal(letterSpacing.getSpace(), null);
- }
- }
-
- /**
- * Returns the Conditionality value.
- * @return the Conditionality value
- */
- public boolean isConditional() {
- return conditional;
- }
-
- /**
- * Returns the Forcing value.
- * @return the Forcing value
- */
- public boolean isForcing() {
- return forcing;
- }
-
- /**
- * Returns the Precedence value.
- * @return the Precedence value
- */
- public int getPrecedence() {
- return precedence;
- }
-
- /**
- * Returns the Space value.
- * @return the Space value
- */
- public MinOptMax getSpace() {
- return space;
- }
-
- /** {@inheritDoc} */
- public String toString() {
- return "SpaceVal: " + getSpace().toString();
- }
- }
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