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; 041import java.util.Iterator; 042 043/** 044 * @author Mark McKay 045 * @author <a href="mailto:mark@kitfox.com">Mark McKay</a> 046 */ 047public class ClipPath extends SVGElement 048{ 049 050 public static final String TAG_NAME = "clippath"; 051 public static final int CP_USER_SPACE_ON_USE = 0; 052 public static final int CP_OBJECT_BOUNDING_BOX = 1; 053 int clipPathUnits = CP_USER_SPACE_ON_USE; 054 055 /** 056 * Creates a new instance of Stop 057 */ 058 public ClipPath() 059 { 060 } 061 062 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 public void loaderAddChild(SVGLoaderHelper helper, SVGElement child) throws SVGElementException 072 { 073 super.loaderAddChild(helper, child); 074 } 075 076 protected void build() throws SVGException 077 { 078 super.build(); 079 080 StyleAttribute sty = new StyleAttribute(); 081 082 clipPathUnits = (getPres(sty.setName("clipPathUnits")) 083 && sty.getStringValue().equals("objectBoundingBox")) 084 ? CP_OBJECT_BOUNDING_BOX 085 : CP_USER_SPACE_ON_USE; 086 } 087 088 public int getClipPathUnits() 089 { 090 return clipPathUnits; 091 } 092 093 public Shape getClipPathShape() 094 { 095 if (children.isEmpty()) 096 { 097 return null; 098 } 099 if (children.size() == 1) 100 { 101 return ((ShapeElement) children.get(0)).getShape(); 102 } 103 104 Area clipArea = null; 105 for (Iterator it = children.iterator(); it.hasNext();) 106 { 107 ShapeElement se = (ShapeElement) it.next(); 108 109 if (clipArea == null) 110 { 111 Shape shape = se.getShape(); 112 if (shape != null) 113 { 114 clipArea = new Area(se.getShape()); 115 } 116 continue; 117 } 118 119 Shape shape = se.getShape(); 120 if (shape != null) 121 { 122 clipArea.intersect(new Area(shape)); 123 } 124 } 125 126 return clipArea; 127 } 128 129 /** 130 * Updates all attributes in this diagram associated with a time event. Ie, 131 * all attributes with track information. 132 * 133 * @return - true if this node has changed state as a result of the time 134 * update 135 */ 136 public boolean updateTime(double curTime) throws SVGException 137 { 138 //Get current values for parameters 139 StyleAttribute sty = new StyleAttribute(); 140 boolean shapeChange = false; 141 142 143 if (getPres(sty.setName("clipPathUnits"))) 144 { 145 String newUnitsStrn = sty.getStringValue(); 146 int newUnits = newUnitsStrn.equals("objectBoundingBox") 147 ? CP_OBJECT_BOUNDING_BOX 148 : CP_USER_SPACE_ON_USE; 149 150 if (newUnits != clipPathUnits) 151 { 152 clipPathUnits = newUnits; 153 shapeChange = true; 154 } 155 } 156 157 if (shapeChange) 158 { 159 build(); 160 } 161 162 return shapeChange; 163 } 164}