/*
* $RCSfile: TransformTraitAnim.java,v $
*
* Copyright 1990-2009 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 only, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License version 2 for more details (a copy is
* included at /legal/license.txt).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this work; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*/
package com.sun.perseus.model;
import com.sun.perseus.platform.MathSupport;
import org.w3c.dom.DOMException;
/**
* @version $Id: TransformTraitAnim.java,v 1.3 2006/06/29 10:47:36 ln156897 Exp $
*/
class TransformTraitAnim extends FloatTraitAnim {
/**
* Constructs a new TransformTraitAnim for a given ElementNode trait.
*
* @param targetElement the ElementNode whose trait is animated.
* @param targetTrait the name of the animated trait.
*/
public TransformTraitAnim(final ElementNode targetElement,
final String traitName) {
super(targetElement,
traitName,
ElementNode.TRAIT_TYPE_SVG_MATRIX);
}
/**
* Converts the input values set to a RefValues object.
*
*
* @param anim the <code>TraitAnimationNode</code> for which the values should be
* converted.
* @param values a semi-colon seperated list of values which need to be
* validated.
* @param reqTraitNamespace the namespace of the trait which has the values
* value on the requesting element.
* @param reqTraitName the name of the trait which has the values value on
* the requesting element.
* @throws DOMException with error code INVALID_ACCESS_ERR if the input
* value is incompatible with the given trait.
* @throws NullPointerException if values is null.
*/
RefValues toRefValues(final TraitAnimationNode anim,
String[] values,
final String reqTraitNamespace,
final String reqTraitName) throws DOMException {
// If we are dealing with a generic animation, the values should be
// as in the transform attribute: we can use the default FloatTraitAnim
// toRefValues.
if (anim.type == TraitAnimationNode.TYPE_GENERIC) {
return super.toRefValues(anim, values, reqTraitNamespace,
reqTraitName);
}
// The interpretation of values depends on the animation type.
TransformRefValues refValues = new TransformRefValues();
if (values.length < 1) {
throw new IllegalArgumentException();
}
if (values.length == 1) {
String[] tmpValues = new String[2];
tmpValues[0] = values[0];
tmpValues[1] = values[0];
values = tmpValues;
}
int nSegments = values.length - 1;
TransformSegment[] segments = new TransformSegment[nSegments];
// Build the first segment.
segments[0] = new TransformSegment();
segments[0].start =
validateValue(anim,
reqTraitNamespace,
reqTraitName,
values[0]);
segments[0].end =
validateValue(anim,
reqTraitNamespace,
reqTraitName,
values[1]);
segments[0].type = anim.type;
TransformSegment prevSegment = segments[0];
for (int i = 1; i < nSegments; i++) {
segments[i] = new TransformSegment();
segments[i].start = prevSegment.end;
segments[i].end =
validateValue(anim,
reqTraitNamespace,
reqTraitName,
values[i + 1]);
segments[i].type = anim.type;
prevSegment = segments[i];
}
refValues.segments = segments;
return refValues;
}
/**
* Validates the input trait value.
*
* @param anim the animation for which the value is validated
* @param traitNamespace the namespace trait
* @param traitName the name of the trait to be validated.
* @param value the value to be validated
* @throws DOMException with error code INVALID_ACCESS_ERR if the input
* value is incompatible with the given trait.
*/
public float[] validateValue(final TraitAnimationNode anim,
final String traitNamespace,
final String traitName,
final String value) {
float[] v = null;
switch (anim.type) {
case AnimateTransform.TYPE_TRANSLATE:
v = anim.parseFloatArrayTrait(traitName, value);
if (v.length < 1 || v.length > 2) {
throw anim.illegalTraitValue(traitName, value);
}
if (v.length == 1) {
float[] tv = new float[2];
tv[0] = v[0];
tv[1] = 0;
v = tv;
}
return v;
case AnimateTransform.TYPE_SCALE:
v = anim.parseFloatArrayTrait(traitName, value);
if (v.length < 1 || v.length > 2) {
throw anim.illegalTraitValue(traitName, value);
}
if (v.length == 1) {
float[] tv = new float[2];
tv[0] = v[0];
tv[1] = v[0];
v = tv;
}
return v;
case AnimateTransform.TYPE_ROTATE:
// This should be enhanced to support
v = anim.parseFloatArrayTrait(traitName, value);
if (v.length != 1 && v.length != 3) {
throw anim.illegalTraitValue(traitName, value);
}
if (v.length != 3) {
float[] tv = new float[3];
tv[0] = v[0];
tv[1] = 0;
tv[2] = 0;
v = tv;
}
v[0] = MathSupport.toRadians(v[0]);
return v;
case AnimateTransform.TYPE_SKEW_X:
case AnimateTransform.TYPE_SKEW_Y:
default:
v = new float[] {anim.parseFloatTrait(traitName, value)};
v[0] = MathSupport.toRadians(v[0]);
return v;
}
}
/**
* Used to sum two animated trait values.
*
* @param valueA the base value. May be null.
* @param valueB the value to add to the base value. If the baseValue
*/
public Object[] sum(Object[] valueA, Object[] valueB) {
if (valueA == null) {
return valueB;
}
float[][] fva = (float[][]) valueA;
float[][] fvb = (float[][]) valueB;
// For transforms, we should do matrices multiplication, not
// simple float additions.
float[][] fv = new float[6][1];
fv[0][0] = fvb[0][0] * fva[0][0] + fvb[1][0] * fva[2][0];
fv[1][0] = fvb[0][0] * fva[1][0] + fvb[1][0] * fva[3][0];
fv[2][0] = fvb[2][0] * fva[0][0] + fvb[3][0] * fva[2][0];
fv[3][0] = fvb[2][0] * fva[1][0] + fvb[3][0] * fva[3][0];
fv[4][0] = fvb[4][0] * fva[0][0] + fvb[5][0] * fva[2][0] + fva[4][0];
fv[5][0] = fvb[4][0] * fva[1][0] + fvb[5][0] * fva[3][0] + fva[5][0];
return fv;
}
/**
* Used to multiply an animated trait value by a number of iterations.
*
* @param value the animated trait value to multiply.
* @param iter the number of iteration to account for.
* @return the multiply result.
*/
public Object[] multiply(Object[] value, int iter) {
for (int i = 1; i < iter; i++) {
value = sum(value, value);
}
return value;
}
}