| /* |
| |
| 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. |
| |
| */ |
| package org.apache.batik.anim.values; |
| |
| import org.apache.batik.dom.anim.AnimationTarget; |
| |
| import org.w3c.dom.svg.SVGLength; |
| |
| /** |
| * An SVG length value in the animation system. |
| * |
| * @author <a href="mailto:cam%40mcc%2eid%2eau">Cameron McCormack</a> |
| * @version $Id$ |
| */ |
| public class AnimatableLengthValue extends AnimatableValue { |
| |
| /** |
| * Length units. |
| */ |
| protected static final String[] UNITS = { |
| "", "%", "em", "ex", "px", "cm", "mm", "in", "pt", "pc" |
| }; |
| |
| /** |
| * The length type. |
| */ |
| protected short lengthType; |
| |
| /** |
| * The length value. This should be one of the constants defined in |
| * {@link SVGLength}. |
| */ |
| protected float lengthValue; |
| |
| /** |
| * How to interpret percentage values. One of the |
| * {@link AnimationTarget}.PERCENTAGE_* constants. |
| */ |
| protected short percentageInterpretation; |
| |
| /** |
| * Creates a new AnimatableLengthValue with no length. |
| */ |
| protected AnimatableLengthValue(AnimationTarget target) { |
| super(target); |
| } |
| |
| /** |
| * Creates a new AnimatableLengthValue. |
| */ |
| public AnimatableLengthValue(AnimationTarget target, short type, float v, |
| short pcInterp) { |
| super(target); |
| lengthType = type; |
| lengthValue = v; |
| percentageInterpretation = pcInterp; |
| } |
| |
| /** |
| * Performs interpolation to the given value. |
| */ |
| public AnimatableValue interpolate(AnimatableValue result, |
| AnimatableValue to, |
| float interpolation, |
| AnimatableValue accumulation, |
| int multiplier) { |
| AnimatableLengthValue res; |
| if (result == null) { |
| res = new AnimatableLengthValue(target); |
| } else { |
| res = (AnimatableLengthValue) result; |
| } |
| |
| short oldLengthType = res.lengthType; |
| float oldLengthValue = res.lengthValue; |
| short oldPercentageInterpretation = res.percentageInterpretation; |
| |
| res.lengthType = lengthType; |
| res.lengthValue = lengthValue; |
| res.percentageInterpretation = percentageInterpretation; |
| |
| if (to != null) { |
| AnimatableLengthValue toLength = (AnimatableLengthValue) to; |
| float toValue; |
| if (!compatibleTypes |
| (res.lengthType, res.percentageInterpretation, |
| toLength.lengthType, toLength.percentageInterpretation)) { |
| res.lengthValue = target.svgToUserSpace |
| (res.lengthValue, res.lengthType, |
| res.percentageInterpretation); |
| res.lengthType = SVGLength.SVG_LENGTHTYPE_NUMBER; |
| toValue = toLength.target.svgToUserSpace |
| (toLength.lengthValue, toLength.lengthType, |
| toLength.percentageInterpretation); |
| } else { |
| toValue = toLength.lengthValue; |
| } |
| res.lengthValue += interpolation * (toValue - res.lengthValue); |
| } |
| |
| if (accumulation != null) { |
| AnimatableLengthValue accLength = (AnimatableLengthValue) accumulation; |
| float accValue; |
| if (!compatibleTypes |
| (res.lengthType, res.percentageInterpretation, |
| accLength.lengthType, |
| accLength.percentageInterpretation)) { |
| res.lengthValue = target.svgToUserSpace |
| (res.lengthValue, res.lengthType, |
| res.percentageInterpretation); |
| res.lengthType = SVGLength.SVG_LENGTHTYPE_NUMBER; |
| accValue = accLength.target.svgToUserSpace |
| (accLength.lengthValue, accLength.lengthType, |
| accLength.percentageInterpretation); |
| } else { |
| accValue = accLength.lengthValue; |
| } |
| res.lengthValue += multiplier * accValue; |
| } |
| |
| if (oldPercentageInterpretation != res.percentageInterpretation |
| || oldLengthType != res.lengthType |
| || oldLengthValue != res.lengthValue) { |
| res.hasChanged = true; |
| } |
| return res; |
| } |
| |
| /** |
| * Determines if two SVG length types are compatible. |
| * @param t1 the first SVG length type |
| * @param pi1 the first percentage interpretation type |
| * @param t2 the second SVG length type |
| * @param pi2 the second percentage interpretation type |
| */ |
| public static boolean compatibleTypes(short t1, short pi1, short t2, |
| short pi2) { |
| return t1 == t2 |
| && (t1 != SVGLength.SVG_LENGTHTYPE_PERCENTAGE || pi1 == pi2) |
| || t1 == SVGLength.SVG_LENGTHTYPE_NUMBER |
| && t2 == SVGLength.SVG_LENGTHTYPE_PX |
| || t1 == SVGLength.SVG_LENGTHTYPE_PX |
| && t2 == SVGLength.SVG_LENGTHTYPE_NUMBER; |
| } |
| |
| /** |
| * Returns the unit type of this length value. |
| */ |
| public int getLengthType() { |
| return lengthType; |
| } |
| |
| /** |
| * Returns the magnitude of this length value. |
| */ |
| public float getLengthValue() { |
| return lengthValue; |
| } |
| |
| /** |
| * Returns whether two values of this type can have their distance |
| * computed, as needed by paced animation. |
| */ |
| public boolean canPace() { |
| return true; |
| } |
| |
| /** |
| * Returns the absolute distance between this value and the specified other |
| * value. |
| */ |
| public float distanceTo(AnimatableValue other) { |
| AnimatableLengthValue o = (AnimatableLengthValue) other; |
| float v1 = target.svgToUserSpace(lengthValue, lengthType, |
| percentageInterpretation); |
| float v2 = target.svgToUserSpace(o.lengthValue, o.lengthType, |
| o.percentageInterpretation); |
| return Math.abs(v1 - v2); |
| } |
| |
| /** |
| * Returns a zero value of this AnimatableValue's type. |
| */ |
| public AnimatableValue getZeroValue() { |
| return new AnimatableLengthValue |
| (target, SVGLength.SVG_LENGTHTYPE_NUMBER, 0f, |
| percentageInterpretation); |
| } |
| |
| /** |
| * Returns the CSS text representation of the value. This could use |
| * org.apache.batik.css.engine.value.FloatValue.getCssText, but we don't |
| * want a dependency on the CSS package. |
| */ |
| public String getCssText() { |
| return formatNumber(lengthValue) + UNITS[lengthType - 1]; |
| } |
| } |