jjg@1736: /*
jjg@1736:  * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
jjg@1736:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
jjg@1736:  *
jjg@1736:  * This code is free software; you can redistribute it and/or modify it
jjg@1736:  * under the terms of the GNU General Public License version 2 only, as
jjg@1736:  * published by the Free Software Foundation.  Oracle designates this
jjg@1736:  * particular file as subject to the "Classpath" exception as provided
jjg@1736:  * by Oracle in the LICENSE file that accompanied this code.
jjg@1736:  *
jjg@1736:  * This code is distributed in the hope that it will be useful, but WITHOUT
jjg@1736:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
jjg@1736:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
jjg@1736:  * version 2 for more details (a copy is included in the LICENSE file that
jjg@1736:  * accompanied this code).
jjg@1736:  *
jjg@1736:  * You should have received a copy of the GNU General Public License version
jjg@1736:  * 2 along with this work; if not, write to the Free Software Foundation,
jjg@1736:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
jjg@1736:  *
jjg@1736:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
jjg@1736:  * or visit www.oracle.com if you need additional information or have any
jjg@1736:  * questions.
jjg@1736:  */
jjg@1736: 
jjg@1736: package com.sun.tools.doclets.formats.html.markup;
jjg@1736: 
jjg@1736: import java.io.IOException;
jjg@1736: import java.io.Writer;
jjg@1736: import java.util.ArrayList;
jjg@1736: import java.util.Collections;
jjg@1736: import java.util.List;
jjg@1736: import com.sun.tools.doclets.internal.toolkit.Content;
jjg@1736: 
jjg@1736: /**
jjg@1736:  * A sequence of Content nodes.
jjg@1736:  */
jjg@1736: public class ContentBuilder extends Content {
jjg@1736:     protected List<Content> contents = Collections.<Content>emptyList();
jjg@1736: 
jjg@1736:     @Override
jjg@1736:     public void addContent(Content content) {
jjg@1736:         if (content.isEmpty())
jjg@1736:             return;
jjg@1736:         ensureMutableContents();
jjg@1736:         if (content instanceof ContentBuilder) {
jjg@1736:             contents.addAll(((ContentBuilder) content).contents);
jjg@1736:         } else
jjg@1736:             contents.add(content);
jjg@1736:     }
jjg@1736: 
jjg@1736:     @Override
jjg@1736:     public void addContent(String text) {
jjg@1736:         if (text.isEmpty())
jjg@1736:             return;
jjg@1736:         ensureMutableContents();
jjg@1736:         Content c = contents.isEmpty() ? null : contents.get(contents.size() - 1);
jjg@1736:         StringContent sc;
jjg@1736:         if (c != null && c instanceof StringContent) {
jjg@1736:             sc = (StringContent) c;
jjg@1736:         } else {
jjg@1736:             contents.add(sc = new StringContent());
jjg@1736:         }
jjg@1736:         sc.addContent(text);
jjg@1736:     }
jjg@1736: 
jjg@1736:     @Override
jjg@1736:     public boolean write(Writer writer, boolean atNewline) throws IOException {
jjg@1736:         for (Content content: contents) {
jjg@1736:             atNewline = content.write(writer, atNewline);
jjg@1736:         }
jjg@1736:         return atNewline;
jjg@1736:     }
jjg@1736: 
jjg@1736:     @Override
jjg@1736:     public boolean isEmpty() {
jjg@1736:         for (Content content: contents) {
jjg@1736:             if (!content.isEmpty())
jjg@1736:                 return false;
jjg@1736:         }
jjg@1736:         return true;
jjg@1736:     }
jjg@1736: 
jjg@1736:     private void ensureMutableContents() {
jjg@1736:         if (contents.isEmpty())
jjg@1736:             contents = new ArrayList<Content>();
jjg@1736:     }
jjg@1736: }