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JSF components and utilities that can be used with any JSF implementation. This library is based on the JSF1.1 version of Tomahawk, but with minor source code and build changes to take advantage of JSF1.2 features. A JSF1.2 implementation is required to use this version of the Tomahawk library.
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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.myfaces.custom.stylesheet;

import javax.faces.component.UIComponentBase;

import org.apache.myfaces.component.UserRoleAware;
import org.apache.myfaces.component.UserRoleUtils;


/**
 * Renders the path to a common CSS-file
 * 
 * @JSFComponent
 *   name = "t:stylesheet"
 *   class = "org.apache.myfaces.custom.stylesheet.Stylesheet"
 *   tagClass = "org.apache.myfaces.custom.stylesheet.StylesheetTag"
 * @since 1.1.7
 * @author mwessendorf (latest modification by $Author: lu4242 $)
 * @version $Revision: 691856 $ $Date: 2008-09-03 21:40:30 -0500 (Wed, 03 Sep 2008) $
 */
public abstract class AbstractStylesheet extends UIComponentBase
    implements UserRoleAware    
{
    public static final String COMPONENT_TYPE = "org.apache.myfaces.Stylesheet";
    public static final String COMPONENT_FAMILY = "javax.faces.Output";
    private static final String DEFAULT_RENDERER_TYPE = "org.apache.myfaces.Stylesheet";

    /**
     * URL for CSS-file.
     * 
     * If this path starts with a slash, then the webapp context path will be prepended to it.
     * This makes it simple to reference stylesheets at an absolute path within the webapp.
     * A value like "/styles/style.css" becomes "/webappname/styles/style.css".
     * 
     * 
     * If this path does not start with a slash, then it is output unaltered. This supports
     * absolute urls ("http://host/path/style.css"). It also supports having css files relative
     * to the current page ("style.css" or "styles/style.css") but this needs to be used with
     * care as the standard JSF postback/internal-forward navigation style can cause browsers
     * to use an inappropriate base url when resolving relative references.
     *  
     * 
     * @JSFProperty
     *   required="true"
     */
    public abstract String getPath();

    /**
     * Inline the stylesheet file content as in contrast to referencing it as a link.
     * 
     * The file referenced by the path attribute is loaded, and its content is written
     * to the page wrapped in an <script> tag.
     * 
     * 
     * When this option is enabled, the path property must contain an absolute path
     * within the current webapp. External urls ("http://*") and paths relative to the
     * current page are not supported.
     * 
     * 
     * @JSFProperty
     *   defaultValue = "false"
     */
    public abstract boolean isInline();

    /**
     * Cause EL expressions in the stylesheet to be evaluated.
     * 
     * When true, any EL expression in the stylesheet will be evaluated and replaced
     * by its string representation on the first access. The stylesheet will be
     * processed only once. Every subsequent request will get a cached view.
     * 
     * 
     * @JSFProperty
     *   defaultValue = "false"
     */
    public abstract boolean isFiltered();

    /**
     * Define the target media of the styles:
     *     
     *       screen
     *       Intended for non-paged computer screens.
     *       tty
     *       Intended for media using a fixed-pitch character grid, such
     *         as teletypes, terminals, or portable devices with limited
     *         display capabilities.
     *       tv
     *       Intended for television-type devices (low resolution,
     *         color, limited scrollability).
     *       projection
     *       Intended for projectors.
     *       handheld
     *       Intended for handheld devices (small screen, monochrome,
     *         bitmapped graphics, limited bandwidth).
     *       print
     *       Intended for paged, opaque material and for documents
     *         viewed on screen in print preview mode.
     *       braille
     *       Intended for braille tactile feedback devices.
     *       aural
     *       Intended for speech synthesizers.
     *       all
     *       Suitable for all devices.
     *     
     *     Could be a comma separated list.
     *     See also http://www.w3.org/TR/REC-html40/types.html#type-media-descriptors
     * 
     * @JSFProperty
     */
    public abstract String getMedia();

    public boolean isRendered()
    {
        if (!UserRoleUtils.isVisibleOnUserRole(this))
        {
            return false;
        }
        return super.isRendered();
    }

}