001// Copyright 2020 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.corelib.components;
016
017
018import org.apache.tapestry5.BindingConstants;
019import org.apache.tapestry5.ComponentResources;
020import org.apache.tapestry5.MarkupWriter;
021import org.apache.tapestry5.annotations.Parameter;
022import org.apache.tapestry5.annotations.SupportsInformalParameters;
023import org.apache.tapestry5.ioc.annotations.Inject;
024
025/**
026 * Renders an {@code <i>} tag with the CSS class to select a <a href="https://fontawesome.com/v4.7.0/">FontAwesome 4.7.0</a> icon.
027 * If Twitter Bootstrap 3 isn't enabled (i.e @{link Trait#BOOTSTRAP_3 is set to false),
028 * this component automatically and transparently replaces {@link Glyphicon} usages.
029 *
030 * @see org.apache.tapestry5.services.compatibility.Trait#BOOTSTRAP_3
031 * @tapestrydoc
032 * @since 5.5
033 */
034@SupportsInformalParameters
035public class FontAwesomeIcon
036{
037    /**
038     * The name of the icon, e.g., "arrow-up", "flag", "fire" etc.
039     */
040    @Parameter(required = true, allowNull = false, defaultPrefix = BindingConstants.LITERAL)
041    private String name;
042
043    @Inject
044    ComponentResources resources;
045
046    boolean beginRender(MarkupWriter writer)
047    {
048        writer.element("i",
049                "class", "fa fa-" + name);
050        resources.renderInformalParameters(writer);
051        writer.end();
052
053        return false;
054    }
055}