aoqi@0: /*
aoqi@0:  * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.  Oracle designates this
aoqi@0:  * particular file as subject to the "Classpath" exception as provided
aoqi@0:  * by Oracle in the LICENSE file that accompanied this code.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: package com.sun.tools.doclets.formats.html.markup;
aoqi@0: 
aoqi@0: import java.io.IOException;
aoqi@0: import java.io.Writer;
aoqi@0: import java.util.ArrayList;
aoqi@0: import java.util.Collections;
aoqi@0: import java.util.List;
aoqi@0: import com.sun.tools.doclets.internal.toolkit.Content;
aoqi@0: 
aoqi@0: /**
aoqi@0:  * A sequence of Content nodes.
aoqi@0:  */
aoqi@0: public class ContentBuilder extends Content {
aoqi@0:     protected List<Content> contents = Collections.<Content>emptyList();
aoqi@0: 
aoqi@0:     @Override
aoqi@0:     public void addContent(Content content) {
aoqi@0:         nullCheck(content);
aoqi@0:         ensureMutableContents();
aoqi@0:         if (content instanceof ContentBuilder) {
aoqi@0:             contents.addAll(((ContentBuilder) content).contents);
aoqi@0:         } else
aoqi@0:             contents.add(content);
aoqi@0:     }
aoqi@0: 
aoqi@0:     @Override
aoqi@0:     public void addContent(String text) {
aoqi@0:         if (text.isEmpty())
aoqi@0:             return;
aoqi@0:         ensureMutableContents();
aoqi@0:         Content c = contents.isEmpty() ? null : contents.get(contents.size() - 1);
aoqi@0:         StringContent sc;
aoqi@0:         if (c != null && c instanceof StringContent) {
aoqi@0:             sc = (StringContent) c;
aoqi@0:         } else {
aoqi@0:             contents.add(sc = new StringContent());
aoqi@0:         }
aoqi@0:         sc.addContent(text);
aoqi@0:     }
aoqi@0: 
aoqi@0:     @Override
aoqi@0:     public boolean write(Writer writer, boolean atNewline) throws IOException {
aoqi@0:         for (Content content: contents) {
aoqi@0:             atNewline = content.write(writer, atNewline);
aoqi@0:         }
aoqi@0:         return atNewline;
aoqi@0:     }
aoqi@0: 
aoqi@0:     @Override
aoqi@0:     public boolean isEmpty() {
aoqi@0:         for (Content content: contents) {
aoqi@0:             if (!content.isEmpty())
aoqi@0:                 return false;
aoqi@0:         }
aoqi@0:         return true;
aoqi@0:     }
aoqi@0: 
aoqi@0:     @Override
aoqi@0:     public int charCount() {
aoqi@0:         int n = 0;
aoqi@0:         for (Content c : contents)
aoqi@0:             n += c.charCount();
aoqi@0:         return n;
aoqi@0:     }
aoqi@0: 
aoqi@0:     private void ensureMutableContents() {
aoqi@0:         if (contents.isEmpty())
aoqi@0:             contents = new ArrayList<Content>();
aoqi@0:     }
aoqi@0: }