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
015package org.apache.tapestry.wml;
016
017import org.apache.tapestry.AbstractComponent;
018import org.apache.tapestry.IAsset;
019import org.apache.tapestry.IMarkupWriter;
020import 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
031public 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}