001    // Copyright 2006, 2007, 2008, 2009 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    //     http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.tapestry5.dom;
016    
017    import org.apache.tapestry5.ioc.internal.util.CollectionFactory;
018    
019    import java.util.Set;
020    
021    /**
022     * Default implementation of {@link org.apache.tapestry5.dom.MarkupModel} that is appropriate for traditional (X)HTML
023     * markup. Assumes that all tags are lower-case.  The majority of elements will be "expanded" (meaning a complete start
024     * and end tag); this is for compatibility with web browsers, especially when the content type of a response indicates
025     * HTML, not true XML. Only the "hr", "br","img", "link", and "meta" tags will be rendered abbreviated (i.e., "lt;img/>").
026     */
027    public class DefaultMarkupModel extends AbstractMarkupModel
028    {
029        private final Set<String> ALWAYS_EMPTY = CollectionFactory.newSet("hr", "br", "img", "link", "meta");
030    
031        public DefaultMarkupModel()
032        {
033            this(false);
034        }
035    
036        public DefaultMarkupModel(boolean useApostropheForAttributes)
037        {
038            super(useApostropheForAttributes);
039        }
040    
041        public EndTagStyle getEndTagStyle(String element)
042        {
043            boolean alwaysEmpty = ALWAYS_EMPTY.contains(element);
044    
045            return alwaysEmpty ? EndTagStyle.ABBREVIATE : EndTagStyle.REQUIRE;
046        }
047    
048        /**
049         * Returns false.
050         */
051        public boolean isXML()
052        {
053            return false;
054        }
055    }