| /** |
| * 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.hadoop.yarn.webapp.view; |
| |
| import java.io.PrintWriter; |
| import java.util.EnumSet; |
| |
| import org.apache.hadoop.yarn.webapp.MimeType; |
| import org.apache.hadoop.yarn.webapp.SubView; |
| import org.apache.hadoop.yarn.webapp.WebAppException; |
| import org.apache.hadoop.yarn.webapp.hamlet.Hamlet; |
| |
| public abstract class HtmlPage extends TextView { |
| |
| public static class _ implements Hamlet._ { |
| } |
| |
| public class Page extends Hamlet { |
| Page(PrintWriter out) { |
| super(out, 0, false); |
| } |
| |
| @Override |
| protected void subView(Class<? extends SubView> cls) { |
| context().set(nestLevel(), wasInline()); |
| render(cls); |
| setWasInline(context().wasInline()); |
| } |
| |
| public HTML<HtmlPage._> html() { |
| return new HTML<HtmlPage._>("html", null, EnumSet.of(EOpt.ENDTAG)); |
| } |
| } |
| |
| public static final String DOCTYPE = |
| "<!DOCTYPE html PUBLIC \"-//W3C//DTD HTML 4.01//EN\""+ |
| " \"http://www.w3.org/TR/html4/strict.dtd\">"; |
| |
| private Page page; |
| |
| private Page page() { |
| if (page == null) { |
| page = new Page(writer()); |
| } |
| return page; |
| } |
| |
| protected HtmlPage() { |
| this(null); |
| } |
| |
| protected HtmlPage(ViewContext ctx) { |
| super(ctx, MimeType.HTML); |
| } |
| |
| @Override |
| public void render() { |
| puts(DOCTYPE); |
| render(page().html().meta_http("Content-type", MimeType.HTML)); |
| if (page().nestLevel() != 0) { |
| throw new WebAppException("Error rendering page: nestLevel="+ |
| page().nestLevel()); |
| } |
| } |
| |
| protected abstract void render(Page.HTML<_> html); |
| } |
| |
