/*
 * Copyright (c) 2003, 2021, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
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 *
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package jdk.javadoc.internal.doclets.formats.html.markup;

import java.io.IOException;
import java.io.Writer;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Objects;

import jdk.javadoc.internal.doclets.toolkit.Content;

A sequence of Content nodes.
/** * A sequence of Content nodes. */
public class ContentBuilder extends Content { protected List<Content> contents = Collections.emptyList(); public ContentBuilder() { } public ContentBuilder(Content... contents) { for (Content c : contents) { add(c); } } @Override public ContentBuilder add(Content content) { Objects.requireNonNull(content); ensureMutableContents(); if (content instanceof ContentBuilder) { contents.addAll(((ContentBuilder) content).contents); } else contents.add(content); return this; } @Override public ContentBuilder add(CharSequence text) { if (text.length() > 0) { ensureMutableContents(); Content c = contents.isEmpty() ? null : contents.get(contents.size() - 1); TextBuilder tb; if (c != null && c instanceof TextBuilder) { tb = (TextBuilder) c; } else { contents.add(tb = new TextBuilder()); } tb.add(text); } return this; } @Override public boolean write(Writer writer, boolean atNewline) throws IOException { for (Content content: contents) { atNewline = content.write(writer, atNewline); } return atNewline; } @Override public boolean isEmpty() { for (Content content: contents) { if (!content.isEmpty()) return false; } return true; } @Override public int charCount() { int n = 0; for (Content c : contents) n += c.charCount(); return n; } private void ensureMutableContents() { if (contents.isEmpty()) contents = new ArrayList<>(); } }