001/* 002 * SVG Salamander 003 * Copyright (c) 2004, Mark McKay 004 * All rights reserved. 005 * 006 * Redistribution and use in source and binary forms, with or 007 * without modification, are permitted provided that the following 008 * conditions are met: 009 * 010 * - Redistributions of source code must retain the above 011 * copyright notice, this list of conditions and the following 012 * disclaimer. 013 * - Redistributions in binary form must reproduce the above 014 * copyright notice, this list of conditions and the following 015 * disclaimer in the documentation and/or other materials 016 * provided with the distribution. 017 * 018 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 019 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 020 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 021 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 022 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 023 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 024 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 025 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 026 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 027 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 028 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 029 * OF THE POSSIBILITY OF SUCH DAMAGE. 030 * 031 * Mark McKay can be contacted at mark@kitfox.com. Salamander and other 032 * projects can be found at http://www.kitfox.com 033 * 034 * Created on January 26, 2004, 1:56 AM 035 */ 036package com.kitfox.svg; 037 038import com.kitfox.svg.xml.StyleAttribute; 039import java.awt.Shape; 040import java.awt.geom.Area; 041 042/** 043 * @author Mark McKay 044 * @author <a href="mailto:mark@kitfox.com">Mark McKay</a> 045 */ 046public class ClipPath extends SVGElement 047{ 048 049 public static final String TAG_NAME = "clippath"; 050 public static final int CP_USER_SPACE_ON_USE = 0; 051 public static final int CP_OBJECT_BOUNDING_BOX = 1; 052 int clipPathUnits = CP_USER_SPACE_ON_USE; 053 054 /** 055 * Creates a new instance of Stop 056 */ 057 public ClipPath() 058 { 059 } 060 061 @Override 062 public String getTagName() 063 { 064 return TAG_NAME; 065 } 066 067 /** 068 * Called after the start element but before the end element to indicate 069 * each child tag that has been processed 070 */ 071 @Override 072 public void loaderAddChild(SVGLoaderHelper helper, SVGElement child) throws SVGElementException 073 { 074 super.loaderAddChild(helper, child); 075 } 076 077 @Override 078 protected void build() throws SVGException 079 { 080 super.build(); 081 082 StyleAttribute sty = new StyleAttribute(); 083 084 clipPathUnits = (getPres(sty.setName("clipPathUnits")) 085 && sty.getStringValue().equals("objectBoundingBox")) 086 ? CP_OBJECT_BOUNDING_BOX 087 : CP_USER_SPACE_ON_USE; 088 } 089 090 public int getClipPathUnits() 091 { 092 return clipPathUnits; 093 } 094 095 public Shape getClipPathShape() 096 { 097 if (children.isEmpty()) 098 { 099 return null; 100 } 101 if (children.size() == 1) 102 { 103 return ((ShapeElement) children.get(0)).getShape(); 104 } 105 106 Area clipArea = null; 107 for (SVGElement svgElement : children) { 108 ShapeElement se = (ShapeElement) svgElement; 109 110 if (clipArea == null) 111 { 112 Shape shape = se.getShape(); 113 if (shape != null) 114 { 115 clipArea = new Area(se.getShape()); 116 } 117 continue; 118 } 119 120 Shape shape = se.getShape(); 121 if (shape != null) 122 { 123 clipArea.intersect(new Area(shape)); 124 } 125 } 126 127 return clipArea; 128 } 129 130 /** 131 * Updates all attributes in this diagram associated with a time event. Ie, 132 * all attributes with track information. 133 * 134 * @param curTime Time at which to evaluate node 135 * @return - true if this node has changed state as a result of the time 136 * update 137 * @throws com.kitfox.svg.SVGException 138 */ 139 @Override 140 public boolean updateTime(double curTime) throws SVGException 141 { 142 //Get current values for parameters 143 StyleAttribute sty = new StyleAttribute(); 144 boolean shapeChange = false; 145 146 147 if (getPres(sty.setName("clipPathUnits"))) 148 { 149 String newUnitsStrn = sty.getStringValue(); 150 int newUnits = newUnitsStrn.equals("objectBoundingBox") 151 ? CP_OBJECT_BOUNDING_BOX 152 : CP_USER_SPACE_ON_USE; 153 154 if (newUnits != clipPathUnits) 155 { 156 clipPathUnits = newUnits; 157 shapeChange = true; 158 } 159 } 160 161 if (shapeChange) 162 { 163 build(); 164 } 165 166 for (int i = 0; i < children.size(); ++i) 167 { 168 SVGElement ele = (SVGElement) children.get(i); 169 ele.updateTime(curTime); 170 } 171 172 return shapeChange; 173 } 174}