| // *************************************************************************************************************************** |
| // * 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.juneau.html; |
| |
| import org.apache.juneau.svl.*; |
| |
| /** |
| * Defines an interface for resolvers of <js>"$W{...}"</js> string variables. |
| * |
| * <p> |
| * Widgets must provide one of the following public constructors: |
| * <ul> |
| * <li><code><jk>public</jk> Widget();</code> |
| * </ul> |
| * |
| * <p> |
| * Widgets can be defined as inner classes of REST resource classes. |
| * |
| * <ul class='seealso'> |
| * <li class='link'>{@doc juneau-rest-server.HtmlDocAnnotation.Widgets} |
| * </ul> |
| */ |
| public interface HtmlWidget { |
| |
| /** |
| * The name for this widget. |
| * |
| * @return A unique identifying name for this widget. |
| */ |
| public String getName(); |
| |
| /** |
| * Resolves the HTML content for this widget. |
| * |
| * <p> |
| * A returned value of <jk>null</jk> will cause nothing to be added to the page. |
| * |
| * @param session The current serializer session. |
| * @return The HTML content of this widget. |
| * @throws Exception Error occurred. |
| */ |
| public String getHtml(VarResolverSession session) throws Exception; |
| |
| /** |
| * Resolves any Javascript that should be added to the <xt><head>/<script></xt> element. |
| * |
| * <p> |
| * A returned value of <jk>null</jk> will cause nothing to be added to the page. |
| * |
| * @param session The current serializer session. |
| * @return The Javascript needed by this widget. |
| * @throws Exception Error occurred. |
| */ |
| public String getScript(VarResolverSession session) throws Exception; |
| |
| /** |
| * Resolves any CSS styles that should be added to the <xt><head>/<style></xt> element. |
| * |
| * <p> |
| * A returned value of <jk>null</jk> will cause nothing to be added to the page. |
| * |
| * @param session The current serializer session. |
| * @return The CSS styles needed by this widget. |
| * @throws Exception Error occurred. |
| */ |
| public String getStyle(VarResolverSession session) throws Exception; |
| } |