Source Code Cross Referenced for StylableExtensionElement.java in  » Graphic-Library » batik » org » apache » batik » extension » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Graphic Library » batik » org.apache.batik.extension 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:
003:           Licensed to the Apache Software Foundation (ASF) under one or more
004:           contributor license agreements.  See the NOTICE file distributed with
005:           this work for additional information regarding copyright ownership.
006:           The ASF licenses this file to You under the Apache License, Version 2.0
007:           (the "License"); you may not use this file except in compliance with
008:           the License.  You may obtain a copy of the License at
009:
010:               http://www.apache.org/licenses/LICENSE-2.0
011:
012:           Unless required by applicable law or agreed to in writing, software
013:           distributed under the License is distributed on an "AS IS" BASIS,
014:           WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015:           See the License for the specific language governing permissions and
016:           limitations under the License.
017:
018:         */
019:        package org.apache.batik.extension;
020:
021:        import java.net.MalformedURLException;
022:        import java.net.URL;
023:
024:        import org.apache.batik.css.engine.CSSStylableElement;
025:        import org.apache.batik.css.engine.StyleDeclarationProvider;
026:        import org.apache.batik.css.engine.StyleMap;
027:        import org.apache.batik.dom.AbstractDocument;
028:
029:        import org.w3c.dom.Node;
030:        import org.w3c.dom.css.CSSStyleDeclaration;
031:        import org.w3c.dom.css.CSSValue;
032:        import org.w3c.dom.svg.SVGAnimatedString;
033:        import org.w3c.dom.svg.SVGStylable;
034:
035:        /**
036:         * This class implements the basic features an element must have in
037:         * order to be usable as a foreign element within an SVGOMDocument,
038:         * and the support for both the 'style' attribute and the style
039:         * attributes (ie: fill="red", ...).
040:         *
041:         * @author <a href="mailto:stephane@hillion.org">Stephane Hillion</a>
042:         * @version $Id: StylableExtensionElement.java 489226 2006-12-21 00:05:36Z cam $
043:         */
044:        public abstract class StylableExtensionElement extends ExtensionElement
045:                implements  CSSStylableElement, SVGStylable {
046:
047:            /**
048:             * The base URL.
049:             */
050:            protected URL cssBase;
051:
052:            /**
053:             * The computed style map.
054:             */
055:            protected StyleMap computedStyleMap;
056:
057:            /**
058:             * Creates a new Element object.
059:             */
060:            protected StylableExtensionElement() {
061:            }
062:
063:            /**
064:             * Creates a new Element object.
065:             * @param name The element name, for validation purposes.
066:             * @param owner The owner document.
067:             */
068:            protected StylableExtensionElement(String name,
069:                    AbstractDocument owner) {
070:                super (name, owner);
071:            }
072:
073:            // CSSStylableElement //////////////////////////////////////////
074:
075:            /**
076:             * Returns the computed style of this element/pseudo-element.
077:             */
078:            public StyleMap getComputedStyleMap(String pseudoElement) {
079:                return computedStyleMap;
080:            }
081:
082:            /**
083:             * Sets the computed style of this element/pseudo-element.
084:             */
085:            public void setComputedStyleMap(String pseudoElement, StyleMap sm) {
086:                computedStyleMap = sm;
087:            }
088:
089:            /**
090:             * Returns the ID of this element.
091:             */
092:            public String getXMLId() {
093:                return getAttributeNS(null, "id");
094:            }
095:
096:            /**
097:             * Returns the class of this element.
098:             */
099:            public String getCSSClass() {
100:                return getAttributeNS(null, "class");
101:            }
102:
103:            /**
104:             * Returns the CSS base URL of this element.
105:             * @throws IllegalArgumentException when {@link #getBaseURI()} returns an
106:             *         invalid URL. The information from the MalformedURLException
107:             *         is passed to the IllegalArgumentException
108:             */
109:            public URL getCSSBase() {
110:                String bu = "";
111:                if (cssBase == null) {
112:                    try {
113:                        bu = getBaseURI();
114:                        if (bu == null) {
115:                            return null;
116:                        }
117:                        cssBase = new URL(bu);
118:                    } catch (MalformedURLException e) {
119:                        String msg = "MalformedURLException:" + e.getMessage()
120:                                + ':' + bu;
121:                        throw new IllegalArgumentException(msg);
122:                    }
123:                }
124:                return cssBase;
125:            }
126:
127:            /**
128:             * Tells whether this element is an instance of the given pseudo
129:             * class.
130:             */
131:            public boolean isPseudoInstanceOf(String pseudoClass) {
132:                if (pseudoClass.equals("first-child")) {
133:                    Node n = getPreviousSibling();
134:                    while (n != null && n.getNodeType() != ELEMENT_NODE) {
135:                        n = n.getPreviousSibling();
136:                    }
137:                    return n == null;
138:                }
139:                return false;
140:            }
141:
142:            /**
143:             * Returns the object that gives access to the underlying
144:             * {@link org.apache.batik.css.engine.StyleDeclaration} for the override
145:             * style of this element.
146:             */
147:            public StyleDeclarationProvider getOverrideStyleDeclarationProvider() {
148:                return null;
149:            }
150:
151:            // SVGStylable //////////////////////////////////////////////////
152:
153:            /**
154:             * <b>DOM</b>: Implements {@link org.w3c.dom.svg.SVGStylable#getStyle()}.
155:             */
156:            public CSSStyleDeclaration getStyle() {
157:                throw new UnsupportedOperationException("Not implemented");
158:            }
159:
160:            /**
161:             * <b>DOM</b>: Implements {@link
162:             * org.w3c.dom.svg.SVGStylable#getPresentationAttribute(String)}.
163:             */
164:            public CSSValue getPresentationAttribute(String name) {
165:                throw new UnsupportedOperationException("Not implemented");
166:            }
167:
168:            /**
169:             * <b>DOM</b>: Implements {@link
170:             * org.w3c.dom.svg.SVGStylable#getClassName()}.
171:             */
172:            public SVGAnimatedString getClassName() {
173:                throw new UnsupportedOperationException("Not implemented");
174:            }
175:        }
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