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/*
* Copyright 1999-2005 The Apache Software Foundation.
*
* Licensed 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 bConditional;
private final boolean bForcing;
private final int iPrecedence; // 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 = new MinOptMax(spaceprop.getMinimum(context).getLength().getValue(context),
spaceprop.getOptimum(context).getLength().getValue(context),
spaceprop.getMaximum(context).getLength().getValue(context));
bConditional =
(spaceprop.getConditionality().getEnum() == Constants.EN_DISCARD);
Property precProp = spaceprop.getPrecedence();
if (precProp.getNumber() != null) {
iPrecedence = precProp.getNumber().intValue();
bForcing = false;
} else {
bForcing = (precProp.getEnum() == Constants.EN_FORCE);
iPrecedence = 0;
}
}
/**
* Constructor for SpaceVal objects based on the full set of properties.
* @param space space to use
* @param bConditional Conditionality value
* @param bForcing Forcing value
* @param iPrecedence Precedence value
*/
public SpaceVal(MinOptMax space, boolean bConditional,
boolean bForcing, int iPrecedence) {
this.space = space;
this.bConditional = bConditional;
this.bForcing = bForcing;
this.iPrecedence = iPrecedence;
}
static public 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 = new MinOptMax(-spaceCharIPD / 3, 0, spaceCharIPD / 2);
//TODO Adding 2 letter spaces here is not 100% correct. Spaces don't have letter spacing
return new SpaceVal(
MinOptMax.add
(space, MinOptMax.multiply(letterSpacing.getSpace(), 2)),
true, true, 0);
} else {
return new SpaceVal(wordSpacing.getSpace(), null);
}
}
static public SpaceVal makeLetterSpacing(Property letterSpacing) {
if (letterSpacing.getEnum() == Constants.EN_NORMAL) {
// letter spaces are set to zero (or use different values?)
return new SpaceVal(new MinOptMax(0), true, true, 0);
} else {
return new SpaceVal(letterSpacing.getSpace(), null);
}
}
/**
* Returns the Conditionality value.
* @return the Conditionality value
*/
public boolean isConditional() {
return bConditional;
}
/**
* Returns the Forcing value.
* @return the Forcing value
*/
public boolean isForcing() {
return bForcing;
}
/**
* Returns the Precedence value.
* @return the Precedence value
*/
public int getPrecedence() {
return iPrecedence;
}
/**
* Returns the Space value.
* @return the Space value
*/
public MinOptMax getSpace() {
return space;
}
public String toString() {
return "SpaceVal: " + getSpace().toString();
}
}
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