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
015package org.apache.tapestry5.dom;
016
017import java.util.Set;
018
019import org.apache.tapestry5.commons.util.CollectionFactory;
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 */
027public 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}