| /* |
| |
| 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 java.util.Arrays; |
| |
| import org.apache.batik.anim.dom.AnimationTarget; |
| |
| /** |
| * An SVG path value in the animation system. |
| * |
| * @author <a href="mailto:cam%40mcc%2eid%2eau">Cameron McCormack</a> |
| * @version $Id$ |
| */ |
| public class AnimatablePathDataValue extends AnimatableValue { |
| |
| /** |
| * The path commands. These must be one of the PATHSEG_* |
| * constants defined in {@link org.w3c.dom.svg.SVGPathSeg}. |
| */ |
| protected short[] commands; |
| |
| /** |
| * The path parameters. Also includes the booleans. |
| */ |
| protected float[] parameters; |
| |
| /** |
| * Creates a new, uninitialized AnimatablePathDataValue. |
| */ |
| protected AnimatablePathDataValue(AnimationTarget target) { |
| super(target); |
| } |
| |
| /** |
| * Creates a new AnimatablePathDataValue. |
| */ |
| public AnimatablePathDataValue(AnimationTarget target, short[] commands, |
| float[] parameters) { |
| super(target); |
| this.commands = commands; |
| this.parameters = parameters; |
| } |
| |
| /** |
| * Performs interpolation to the given value. |
| */ |
| public AnimatableValue interpolate(AnimatableValue result, |
| AnimatableValue to, float interpolation, |
| AnimatableValue accumulation, |
| int multiplier) { |
| AnimatablePathDataValue toValue = (AnimatablePathDataValue) to; |
| AnimatablePathDataValue accValue = |
| (AnimatablePathDataValue) accumulation; |
| |
| boolean hasTo = to != null; |
| boolean hasAcc = accumulation != null; |
| boolean canInterpolate = hasTo |
| && toValue.parameters.length == parameters.length |
| && Arrays.equals(toValue.commands, commands); |
| boolean canAccumulate = hasAcc |
| && accValue.parameters.length == parameters.length |
| && Arrays.equals(accValue.commands, commands); |
| |
| AnimatablePathDataValue base; |
| if (!canInterpolate && hasTo && interpolation >= 0.5) { |
| base = toValue; |
| } else { |
| base = this; |
| } |
| int cmdCount = base.commands.length; |
| int paramCount = base.parameters.length; |
| |
| AnimatablePathDataValue res; |
| if (result == null) { |
| res = new AnimatablePathDataValue(target); |
| res.commands = new short[cmdCount]; |
| res.parameters = new float[paramCount]; |
| System.arraycopy(base.commands, 0, res.commands, 0, cmdCount); |
| } else { |
| res = (AnimatablePathDataValue) result; |
| if (res.commands == null || res.commands.length != cmdCount) { |
| res.commands = new short[cmdCount]; |
| System.arraycopy(base.commands, 0, res.commands, 0, cmdCount); |
| res.hasChanged = true; |
| } else { |
| if (!Arrays.equals(base.commands, res.commands)) { |
| System.arraycopy(base.commands, 0, res.commands, 0, |
| cmdCount); |
| res.hasChanged = true; |
| } |
| } |
| } |
| |
| for (int i = 0; i < paramCount; i++) { |
| float newValue = base.parameters[i]; |
| if (canInterpolate) { |
| newValue += interpolation * (toValue.parameters[i] - newValue); |
| } |
| if (canAccumulate) { |
| newValue += multiplier * accValue.parameters[i]; |
| } |
| if (res.parameters[i] != newValue) { |
| res.parameters[i] = newValue; |
| res.hasChanged = true; |
| } |
| } |
| |
| return res; |
| } |
| |
| /** |
| * Returns the array of path data commands. |
| */ |
| public short[] getCommands() { |
| return commands; |
| } |
| |
| /** |
| * Returns the array of path data parameters. |
| */ |
| public float[] getParameters() { |
| return parameters; |
| } |
| |
| /** |
| * Returns whether two values of this type can have their distance |
| * computed, as needed by paced animation. |
| */ |
| public boolean canPace() { |
| return false; |
| } |
| |
| /** |
| * Returns the absolute distance between this value and the specified other |
| * value. |
| */ |
| public float distanceTo(AnimatableValue other) { |
| return 0f; |
| } |
| |
| /** |
| * Returns a zero value of this AnimatableValue's type. |
| */ |
| public AnimatableValue getZeroValue() { |
| short[] cmds = new short[commands.length]; |
| System.arraycopy(commands, 0, cmds, 0, commands.length); |
| float[] params = new float[parameters.length]; |
| return new AnimatablePathDataValue(target, cmds, params); |
| } |
| |
| /** |
| * The path data commands. |
| */ |
| protected static final char[] PATH_COMMANDS = { |
| ' ', 'z', 'M', 'm', 'L', 'l', 'C', 'c', 'Q', 'q', 'A', 'a', 'H', 'h', |
| 'V', 'v', 'S', 's', 'T', 't' |
| }; |
| |
| /** |
| * The number of parameters for each path command. |
| */ |
| protected static final int[] PATH_PARAMS = { |
| 0, 0, 2, 2, 2, 2, 6, 6, 4, 4, 7, 7, 1, 1, 1, 1, 4, 4, 2, 2 |
| }; |
| |
| /** |
| * Returns a string representation of this object. |
| */ |
| public String toStringRep() { |
| StringBuffer sb = new StringBuffer(); |
| int k = 0; |
| for (short command : commands) { |
| sb.append(PATH_COMMANDS[command]); |
| for (int j = 0; j < PATH_PARAMS[command]; j++) { |
| sb.append(' '); |
| sb.append(parameters[k++]); |
| } |
| } |
| return sb.toString(); |
| } |
| } |