[4256] | 1 | /*
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[6002] | 2 | * SVG Salamander
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| 3 | * Copyright (c) 2004, Mark McKay
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| 4 | * All rights reserved.
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[4256] | 5 | *
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[6002] | 6 | * Redistribution and use in source and binary forms, with or
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| 7 | * without modification, are permitted provided that the following
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| 8 | * conditions are met:
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[4256] | 9 | *
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[6002] | 10 | * - Redistributions of source code must retain the above
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| 11 | * copyright notice, this list of conditions and the following
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| 12 | * disclaimer.
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| 13 | * - Redistributions in binary form must reproduce the above
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| 14 | * copyright notice, this list of conditions and the following
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| 15 | * disclaimer in the documentation and/or other materials
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| 16 | * provided with the distribution.
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[4256] | 17 | *
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[6002] | 18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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| 19 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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| 20 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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| 21 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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| 22 | * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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| 23 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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| 24 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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| 25 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 26 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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| 27 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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| 28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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| 29 | * OF THE POSSIBILITY OF SUCH DAMAGE.
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| 30 | *
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| 31 | * Mark McKay can be contacted at mark@kitfox.com. Salamander and other
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| 32 | * projects can be found at http://www.kitfox.com
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[4256] | 33 | *
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| 34 | * Created on January 26, 2004, 3:25 AM
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| 35 | */
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| 36 | package com.kitfox.svg;
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| 37 |
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[6002] | 38 | import com.kitfox.svg.xml.StyleAttribute;
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| 39 | import java.awt.Color;
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| 40 | import java.awt.geom.AffineTransform;
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| 41 | import java.net.URI;
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| 42 | import java.util.ArrayList;
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| 43 | import java.util.Iterator;
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| 44 | import java.util.logging.Level;
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| 45 | import java.util.logging.Logger;
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[4256] | 46 |
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| 47 | /**
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| 48 | * @author Mark McKay
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| 49 | * @author <a href="mailto:mark@kitfox.com">Mark McKay</a>
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| 50 | */
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| 51 | abstract public class Gradient extends FillElement
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| 52 | {
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[6002] | 53 | public static final String TAG_NAME = "gradient";
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| 54 |
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[4256] | 55 | public static final int SM_PAD = 0;
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| 56 | public static final int SM_REPEAT = 1;
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| 57 | public static final int SM_REFLECT = 2;
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| 58 | int spreadMethod = SM_PAD;
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| 59 | public static final int GU_OBJECT_BOUNDING_BOX = 0;
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| 60 | public static final int GU_USER_SPACE_ON_USE = 1;
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| 61 | protected int gradientUnits = GU_OBJECT_BOUNDING_BOX;
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| 62 | //Either this gradient contains a list of stops, or it will take it's
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| 63 | // stops from the referenced gradient
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| 64 | ArrayList stops = new ArrayList();
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| 65 | URI stopRef = null;
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| 66 | protected AffineTransform gradientTransform = null;
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[6002] | 67 |
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[4256] | 68 | //Cache arrays of stop values here
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| 69 | float[] stopFractions;
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| 70 | Color[] stopColors;
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| 71 |
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[6002] | 72 | /**
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| 73 | * Creates a new instance of Gradient
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| 74 | */
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| 75 | public Gradient()
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| 76 | {
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[4256] | 77 | }
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[6002] | 78 |
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| 79 | public String getTagName()
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| 80 | {
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| 81 | return TAG_NAME;
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| 82 | }
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| 83 |
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[4256] | 84 | /**
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| 85 | * Called after the start element but before the end element to indicate
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| 86 | * each child tag that has been processed
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| 87 | */
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| 88 | public void loaderAddChild(SVGLoaderHelper helper, SVGElement child) throws SVGElementException
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| 89 | {
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| 90 | super.loaderAddChild(helper, child);
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| 91 |
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[6002] | 92 | if (!(child instanceof Stop))
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| 93 | {
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| 94 | return;
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| 95 | }
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| 96 | appendStop((Stop) child);
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[4256] | 97 | }
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| 98 |
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| 99 | protected void build() throws SVGException
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| 100 | {
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| 101 | super.build();
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[6002] | 102 |
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[4256] | 103 | StyleAttribute sty = new StyleAttribute();
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| 104 | String strn;
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[6002] | 105 |
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[4256] | 106 | if (getPres(sty.setName("spreadMethod")))
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| 107 | {
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| 108 | strn = sty.getStringValue().toLowerCase();
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[6002] | 109 | if (strn.equals("repeat"))
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| 110 | {
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| 111 | spreadMethod = SM_REPEAT;
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| 112 | } else if (strn.equals("reflect"))
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| 113 | {
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| 114 | spreadMethod = SM_REFLECT;
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| 115 | } else
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| 116 | {
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| 117 | spreadMethod = SM_PAD;
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| 118 | }
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[4256] | 119 | }
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| 120 |
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| 121 | if (getPres(sty.setName("gradientUnits")))
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| 122 | {
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| 123 | strn = sty.getStringValue().toLowerCase();
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[6002] | 124 | if (strn.equals("userspaceonuse"))
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| 125 | {
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| 126 | gradientUnits = GU_USER_SPACE_ON_USE;
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| 127 | } else
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| 128 | {
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| 129 | gradientUnits = GU_OBJECT_BOUNDING_BOX;
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| 130 | }
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[4256] | 131 | }
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| 132 |
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[6002] | 133 | if (getPres(sty.setName("gradientTransform")))
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| 134 | {
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| 135 | gradientTransform = parseTransform(sty.getStringValue());
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| 136 | }
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[4256] | 137 | //If we still don't have one, set it to identity
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[6002] | 138 | if (gradientTransform == null)
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| 139 | {
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| 140 | gradientTransform = new AffineTransform();
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| 141 | }
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[4256] | 142 |
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[6002] | 143 |
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[4256] | 144 | //Check to see if we're using our own stops or referencing someone else's
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| 145 | if (getPres(sty.setName("xlink:href")))
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| 146 | {
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[6002] | 147 | try
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| 148 | {
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[4256] | 149 | stopRef = sty.getURIValue(getXMLBase());
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| 150 | //System.err.println("Gradient: " + sty.getStringValue() + ", " + getXMLBase() + ", " + src);
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| 151 | // URI src = getXMLBase().resolve(href);
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| 152 | // stopRef = (Gradient)diagram.getUniverse().getElement(src);
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[6002] | 153 | } catch (Exception e)
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[4256] | 154 | {
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| 155 | throw new SVGException("Could not resolve relative URL in Gradient: " + sty.getStringValue() + ", " + getXMLBase(), e);
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| 156 | }
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| 157 | }
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| 158 | }
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[6002] | 159 |
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[4256] | 160 | public float[] getStopFractions()
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| 161 | {
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| 162 | if (stopRef != null)
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| 163 | {
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[6002] | 164 | Gradient grad = (Gradient) diagram.getUniverse().getElement(stopRef);
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[4256] | 165 | return grad.getStopFractions();
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| 166 | }
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| 167 |
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[6002] | 168 | if (stopFractions != null)
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| 169 | {
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| 170 | return stopFractions;
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| 171 | }
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[4256] | 172 |
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| 173 | stopFractions = new float[stops.size()];
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| 174 | int idx = 0;
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| 175 | for (Iterator it = stops.iterator(); it.hasNext();)
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| 176 | {
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[6002] | 177 | Stop stop = (Stop) it.next();
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[4256] | 178 | float val = stop.offset;
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[6002] | 179 | if (idx != 0 && val < stopFractions[idx - 1])
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| 180 | {
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| 181 | val = stopFractions[idx - 1];
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| 182 | }
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[4256] | 183 | stopFractions[idx++] = val;
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| 184 | }
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| 185 |
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| 186 | return stopFractions;
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| 187 | }
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| 188 |
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| 189 | public Color[] getStopColors()
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| 190 | {
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| 191 | if (stopRef != null)
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| 192 | {
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[6002] | 193 | Gradient grad = (Gradient) diagram.getUniverse().getElement(stopRef);
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[4256] | 194 | return grad.getStopColors();
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| 195 | }
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| 196 |
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[6002] | 197 | if (stopColors != null)
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| 198 | {
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| 199 | return stopColors;
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| 200 | }
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[4256] | 201 |
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| 202 | stopColors = new Color[stops.size()];
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| 203 | int idx = 0;
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| 204 | for (Iterator it = stops.iterator(); it.hasNext();)
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| 205 | {
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[6002] | 206 | Stop stop = (Stop) it.next();
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[4256] | 207 | int stopColorVal = stop.color.getRGB();
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[6002] | 208 | Color stopColor = new Color((stopColorVal >> 16) & 0xff, (stopColorVal >> 8) & 0xff, stopColorVal & 0xff, clamp((int) (stop.opacity * 255), 0, 255));
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[4256] | 209 | stopColors[idx++] = stopColor;
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| 210 | }
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| 211 |
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| 212 | return stopColors;
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| 213 | }
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[6002] | 214 |
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[4256] | 215 | public void setStops(Color[] colors, float[] fractions)
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| 216 | {
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| 217 | if (colors.length != fractions.length)
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| 218 | {
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| 219 | throw new IllegalArgumentException();
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| 220 | }
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[6002] | 221 |
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[4256] | 222 | this.stopColors = colors;
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| 223 | this.stopFractions = fractions;
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| 224 | stopRef = null;
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| 225 | }
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[6002] | 226 |
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[4256] | 227 | private int clamp(int val, int min, int max)
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| 228 | {
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[6002] | 229 | if (val < min)
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| 230 | {
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| 231 | return min;
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| 232 | }
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| 233 | if (val > max)
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| 234 | {
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| 235 | return max;
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| 236 | }
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[4256] | 237 | return val;
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| 238 | }
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[6002] | 239 |
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[4256] | 240 | public void setStopRef(URI grad)
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| 241 | {
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| 242 | stopRef = grad;
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| 243 | }
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| 244 |
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| 245 | public void appendStop(Stop stop)
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| 246 | {
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| 247 | stops.add(stop);
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| 248 | }
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| 249 |
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| 250 | /**
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[6002] | 251 | * Updates all attributes in this diagram associated with a time event. Ie,
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| 252 | * all attributes with track information.
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| 253 | *
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[4256] | 254 | * @return - true if this node has changed state as a result of the time
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| 255 | * update
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| 256 | */
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| 257 | public boolean updateTime(double curTime) throws SVGException
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| 258 | {
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| 259 | // if (trackManager.getNumTracks() == 0) return false;
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| 260 | boolean stateChange = false;
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| 261 |
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| 262 | //Get current values for parameters
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| 263 | StyleAttribute sty = new StyleAttribute();
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| 264 | boolean shapeChange = false;
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| 265 | String strn;
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| 266 |
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[6002] | 267 |
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[4256] | 268 | if (getPres(sty.setName("spreadMethod")))
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| 269 | {
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| 270 | int newVal;
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| 271 | strn = sty.getStringValue().toLowerCase();
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[6002] | 272 | if (strn.equals("repeat"))
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| 273 | {
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| 274 | newVal = SM_REPEAT;
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| 275 | } else if (strn.equals("reflect"))
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| 276 | {
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| 277 | newVal = SM_REFLECT;
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| 278 | } else
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| 279 | {
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| 280 | newVal = SM_PAD;
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| 281 | }
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[4256] | 282 | if (spreadMethod != newVal)
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| 283 | {
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| 284 | spreadMethod = newVal;
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| 285 | stateChange = true;
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| 286 | }
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| 287 | }
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[6002] | 288 |
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[4256] | 289 | if (getPres(sty.setName("gradientUnits")))
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| 290 | {
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| 291 | int newVal;
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| 292 | strn = sty.getStringValue().toLowerCase();
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[6002] | 293 | if (strn.equals("userspaceonuse"))
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| 294 | {
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| 295 | newVal = GU_USER_SPACE_ON_USE;
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| 296 | } else
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| 297 | {
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| 298 | newVal = GU_OBJECT_BOUNDING_BOX;
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| 299 | }
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[4256] | 300 | if (newVal != gradientUnits)
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| 301 | {
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| 302 | gradientUnits = newVal;
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| 303 | stateChange = true;
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| 304 | }
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| 305 | }
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| 306 |
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| 307 | if (getPres(sty.setName("gradientTransform")))
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| 308 | {
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| 309 | AffineTransform newVal = parseTransform(sty.getStringValue());
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| 310 | if (newVal != null && newVal.equals(gradientTransform))
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| 311 | {
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| 312 | gradientTransform = newVal;
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| 313 | stateChange = true;
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| 314 | }
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| 315 | }
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| 316 |
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[6002] | 317 |
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[4256] | 318 | //Check to see if we're using our own stops or referencing someone else's
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| 319 | if (getPres(sty.setName("xlink:href")))
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| 320 | {
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[6002] | 321 | try
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| 322 | {
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[4256] | 323 | URI newVal = sty.getURIValue(getXMLBase());
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| 324 | if ((newVal == null && stopRef != null) || !newVal.equals(stopRef))
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| 325 | {
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| 326 | stopRef = newVal;
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| 327 | stateChange = true;
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| 328 | }
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[6002] | 329 | } catch (Exception e)
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[4256] | 330 | {
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[6002] | 331 | Logger.getLogger(SVGConst.SVG_LOGGER).log(Level.WARNING,
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| 332 | "Could not parse xlink:href", e);
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[4256] | 333 | }
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| 334 | }
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[6002] | 335 |
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[4256] | 336 | //Check stops, if any
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| 337 | for (Iterator it = stops.iterator(); it.hasNext();)
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| 338 | {
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[6002] | 339 | Stop stop = (Stop) it.next();
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[4256] | 340 | if (stop.updateTime(curTime))
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| 341 | {
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| 342 | stateChange = true;
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| 343 | stopFractions = null;
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| 344 | stopColors = null;
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| 345 | }
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| 346 | }
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[6002] | 347 |
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[4256] | 348 | return stateChange;
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| 349 | }
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| 350 | }
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