/*
============================================================================
The Apache Software License, Version 1.1
============================================================================
Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
Redistribution and use in source and binary forms, with or without modifica-
tion, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
3. The end-user documentation included with the redistribution, if any, must
include the following acknowledgment: "This product includes software
developed by the Apache Software Foundation (http://www.apache.org/)."
Alternately, this acknowledgment may appear in the software itself, if
and wherever such third-party acknowledgments normally appear.
4. The names "Batik" and "Apache Software Foundation" must not be
used to endorse or promote products derived from this software without
prior written permission. For written permission, please contact
apache@apache.org.
5. Products derived from this software may not be called "Apache", nor may
"Apache" appear in their name, without prior written permission of the
Apache Software Foundation.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
This software consists of voluntary contributions made by many individuals
on behalf of the Apache Software Foundation. For more information on the
Apache Software Foundation, please see <http://www.apache.org/>.
*/
package org.apache.batik.css.engine.value;
import org.apache.batik.css.engine.CSSContext;
import org.apache.batik.css.engine.CSSEngine;
import org.apache.batik.css.engine.CSSStylableElement;
import org.apache.batik.css.engine.StyleMap;
import org.w3c.css.sac.LexicalUnit;
import org.w3c.dom.DOMException;
import org.w3c.dom.css.CSSPrimitiveValue;
import org.w3c.dom.css.CSSValue;
/**
* This class provides a manager for the property with support for
* length values.
*
* @author <a href="mailto:stephane@hillion.org">Stephane Hillion</a>
* @version $Id: LengthManager.java,v 1.5 2003/08/08 11:38:55 vhardy Exp $
*/
public abstract class LengthManager extends AbstractValueManager {
/**
* Implements {@link ValueManager#createValue(LexicalUnit,CSSEngine)}.
*/
public Value createValue(LexicalUnit lu, CSSEngine engine)
throws DOMException {
switch (lu.getLexicalUnitType()) {
case LexicalUnit.SAC_EM:
return new FloatValue(CSSPrimitiveValue.CSS_EMS,
lu.getFloatValue());
case LexicalUnit.SAC_EX:
return new FloatValue(CSSPrimitiveValue.CSS_EXS,
lu.getFloatValue());
case LexicalUnit.SAC_PIXEL:
return new FloatValue(CSSPrimitiveValue.CSS_PX,
lu.getFloatValue());
case LexicalUnit.SAC_CENTIMETER:
return new FloatValue(CSSPrimitiveValue.CSS_CM,
lu.getFloatValue());
case LexicalUnit.SAC_MILLIMETER:
return new FloatValue(CSSPrimitiveValue.CSS_MM,
lu.getFloatValue());
case LexicalUnit.SAC_INCH:
return new FloatValue(CSSPrimitiveValue.CSS_IN,
lu.getFloatValue());
case LexicalUnit.SAC_POINT:
return new FloatValue(CSSPrimitiveValue.CSS_PT,
lu.getFloatValue());
case LexicalUnit.SAC_PICA:
return new FloatValue(CSSPrimitiveValue.CSS_PC,
lu.getFloatValue());
case LexicalUnit.SAC_INTEGER:
return new FloatValue(CSSPrimitiveValue.CSS_NUMBER,
lu.getIntegerValue());
case LexicalUnit.SAC_REAL:
return new FloatValue(CSSPrimitiveValue.CSS_NUMBER,
lu.getFloatValue());
case LexicalUnit.SAC_PERCENTAGE:
return new FloatValue(CSSPrimitiveValue.CSS_PERCENTAGE,
lu.getFloatValue());
}
throw createInvalidLexicalUnitDOMException(lu.getLexicalUnitType());
}
/**
* Implements {@link ValueManager#createFloatValue(short,float)}.
*/
public Value createFloatValue(short type, float floatValue)
throws DOMException {
switch (type) {
case CSSPrimitiveValue.CSS_PERCENTAGE:
case CSSPrimitiveValue.CSS_EMS:
case CSSPrimitiveValue.CSS_EXS:
case CSSPrimitiveValue.CSS_PX:
case CSSPrimitiveValue.CSS_CM:
case CSSPrimitiveValue.CSS_MM:
case CSSPrimitiveValue.CSS_IN:
case CSSPrimitiveValue.CSS_PT:
case CSSPrimitiveValue.CSS_PC:
case CSSPrimitiveValue.CSS_NUMBER:
return new FloatValue(type, floatValue);
}
throw createInvalidFloatTypeDOMException(type);
}
/**
* Implements {@link
* ValueManager#computeValue(CSSStylableElement,String,CSSEngine,int,StyleMap,Value)}.
*/
public Value computeValue(CSSStylableElement elt,
String pseudo,
CSSEngine engine,
int idx,
StyleMap sm,
Value value) {
if (value.getCssValueType() != CSSValue.CSS_PRIMITIVE_VALUE) {
return value;
}
switch (value.getPrimitiveType()) {
case CSSPrimitiveValue.CSS_NUMBER:
case CSSPrimitiveValue.CSS_PX:
return value;
case CSSPrimitiveValue.CSS_MM:
CSSContext ctx = engine.getCSSContext();
float v = value.getFloatValue();
return new FloatValue(CSSPrimitiveValue.CSS_NUMBER,
v / ctx.getPixelUnitToMillimeter());
case CSSPrimitiveValue.CSS_CM:
ctx = engine.getCSSContext();
v = value.getFloatValue();
return new FloatValue(CSSPrimitiveValue.CSS_NUMBER,
v * 10f / ctx.getPixelUnitToMillimeter());
case CSSPrimitiveValue.CSS_IN:
ctx = engine.getCSSContext();
v = value.getFloatValue();
return new FloatValue(CSSPrimitiveValue.CSS_NUMBER,
v * 25.4f / ctx.getPixelUnitToMillimeter());
case CSSPrimitiveValue.CSS_PT:
ctx = engine.getCSSContext();
v = value.getFloatValue();
return new FloatValue(CSSPrimitiveValue.CSS_NUMBER,
v * 25.4f /
(72f * ctx.getPixelUnitToMillimeter()));
case CSSPrimitiveValue.CSS_PC:
ctx = engine.getCSSContext();
v = value.getFloatValue();
return new FloatValue(CSSPrimitiveValue.CSS_NUMBER,
(v * 25.4f /
(6f * ctx.getPixelUnitToMillimeter())));
case CSSPrimitiveValue.CSS_EMS:
sm.putFontSizeRelative(idx, true);
v = value.getFloatValue();
int fsidx = engine.getFontSizeIndex();
float fs;
fs = engine.getComputedStyle(elt, pseudo, fsidx).getFloatValue();
return new FloatValue(CSSPrimitiveValue.CSS_NUMBER, v * fs);
case CSSPrimitiveValue.CSS_EXS:
sm.putFontSizeRelative(idx, true);
v = value.getFloatValue();
fsidx = engine.getFontSizeIndex();
fs = engine.getComputedStyle(elt, pseudo, fsidx).getFloatValue();
return new FloatValue(CSSPrimitiveValue.CSS_NUMBER, v * fs * 0.5f);
case CSSPrimitiveValue.CSS_PERCENTAGE:
ctx = engine.getCSSContext();
switch (getOrientation()) {
case HORIZONTAL_ORIENTATION:
sm.putBlockWidthRelative(idx, true);
fs = value.getFloatValue() * ctx.getBlockWidth(elt) / 100f;
break;
case VERTICAL_ORIENTATION:
sm.putBlockHeightRelative(idx, true);
fs = value.getFloatValue() * ctx.getBlockHeight(elt) / 100f;
break;
default: // Both
sm.putBlockWidthRelative(idx, true);
sm.putBlockHeightRelative(idx, true);
double w = ctx.getBlockWidth(elt);
double h = ctx.getBlockHeight(elt);
fs = (float)(value.getFloatValue() *
(Math.sqrt(w * w + h * h) / Math.sqrt(2)) / 100.0);
}
return new FloatValue(CSSPrimitiveValue.CSS_NUMBER, fs);
}
return value;
}
//
// Orientation enumeration
//
protected final static int HORIZONTAL_ORIENTATION = 0;
protected final static int VERTICAL_ORIENTATION = 1;
protected final static int BOTH_ORIENTATION = 2;
/**
* Indicates the orientation of the property associated with
* this manager.
*/
protected abstract int getOrientation();
}