001: /*
002:
003: ============================================================================
004: The Apache Software License, Version 1.1
005: ============================================================================
006:
007: Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
008:
009: Redistribution and use in source and binary forms, with or without modifica-
010: tion, are permitted provided that the following conditions are met:
011:
012: 1. Redistributions of source code must retain the above copyright notice,
013: this list of conditions and the following disclaimer.
014:
015: 2. Redistributions in binary form must reproduce the above copyright notice,
016: this list of conditions and the following disclaimer in the documentation
017: and/or other materials provided with the distribution.
018:
019: 3. The end-user documentation included with the redistribution, if any, must
020: include the following acknowledgment: "This product includes software
021: developed by the Apache Software Foundation (http://www.apache.org/)."
022: Alternately, this acknowledgment may appear in the software itself, if
023: and wherever such third-party acknowledgments normally appear.
024:
025: 4. The names "Batik" and "Apache Software Foundation" must not be
026: used to endorse or promote products derived from this software without
027: prior written permission. For written permission, please contact
028: apache@apache.org.
029:
030: 5. Products derived from this software may not be called "Apache", nor may
031: "Apache" appear in their name, without prior written permission of the
032: Apache Software Foundation.
033:
034: THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
035: INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
036: FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
037: APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
038: INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
039: DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
040: OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
041: ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
042: (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
043: THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
044:
045: This software consists of voluntary contributions made by many individuals
046: on behalf of the Apache Software Foundation. For more information on the
047: Apache Software Foundation, please see <http://www.apache.org/>.
048:
049: */
050:
051: package org.apache.batik.css.engine.value;
052:
053: import org.apache.batik.css.engine.CSSEngine;
054: import org.apache.batik.css.engine.CSSStylableElement;
055: import org.apache.batik.css.engine.StyleMap;
056: import org.w3c.css.sac.LexicalUnit;
057: import org.w3c.dom.DOMException;
058:
059: /**
060: * This interface is implemented by objects which manage the values associated
061: * with a property.
062: *
063: * @author <a href="mailto:stephane@hillion.org">Stephane Hillion</a>
064: * @version $Id$
065: */
066: public interface ValueManager {
067:
068: /**
069: * Returns the name of the property handled.
070: */
071: String getPropertyName();
072:
073: /**
074: * Whether the handled property is inherited or not.
075: */
076: boolean isInheritedProperty();
077:
078: /**
079: * Returns the default value for the handled property.
080: */
081: Value getDefaultValue();
082:
083: /**
084: * Creates a value from a lexical unit.
085: * @param lu The SAC lexical unit used to create the value.
086: * @param engine The calling CSSEngine.
087: */
088: Value createValue(LexicalUnit lu, CSSEngine engine)
089: throws DOMException;
090:
091: /**
092: * Creates and returns a new float value.
093: * @param unitType A unit code as defined above. The unit code can only
094: * be a float unit type
095: * @param floatValue The new float value.
096: */
097: Value createFloatValue(short unitType, float floatValue,
098: CSSEngine engine) throws DOMException;
099:
100: /**
101: * Creates and returns a new string value.
102: * @param type A string code as defined in CSSPrimitiveValue. The string
103: * code can only be a string unit type.
104: * @param value The new string value.
105: * @param base The base URL.
106: */
107: Value createStringValue(short type, String value, CSSEngine engine)
108: throws DOMException;
109:
110: /**
111: * Computes the given value.
112: * @param elt The owner of the value.
113: * @param pseudo The pseudo element.
114: * @param engine The CSSEngine.
115: * @param idx The property index in the engine.
116: * @param sm The computed style map.
117: * @param value The value to compute.
118: */
119: Value computeValue(CSSStylableElement elt, String pseudo,
120: CSSEngine engine, int idx, StyleMap sm, Value value);
121:
122: }
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