001    // Copyright 2004, 2005 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.tapestry.wml;
016    
017    import org.apache.tapestry.AbstractComponent;
018    import org.apache.tapestry.IAsset;
019    import org.apache.tapestry.IMarkupWriter;
020    import org.apache.tapestry.IRequestCycle;
021    
022    /**
023     *  The Image component indicates that an image is to be included in the text flow. Image layout is done within the
024     *  context of normal text layout.
025     *
026     *  @author David Solis
027     *  @since 3.0
028     *
029     **/
030    
031    public abstract class Image extends AbstractComponent
032    {
033        /**
034         *  @see org.apache.tapestry.AbstractComponent#renderComponent(org.apache.tapestry.IMarkupWriter, org.apache.tapestry.IRequestCycle)
035         **/
036    
037        protected void renderComponent(IMarkupWriter writer, IRequestCycle cycle)
038        {
039            boolean render = !cycle.isRewinding();
040    
041            if (render)
042            {
043                writer.beginEmpty("img");
044    
045                writer.attribute("src", getImage().buildURL());
046    
047                writer.attribute("alt", getAlt());
048    
049                renderInformalParameters(writer, cycle);
050    
051                writer.closeTag();
052            }
053        }
054    
055        public abstract IAsset getImage();
056    
057            public abstract String getAlt();
058    }