/*
* Copyright 2012 the original author or authors.
*
* Licensed 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.gradle.build.docs.dsl.docbook;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.Text;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
class DocBookBuilder {
final LinkedList<Element> stack = new LinkedList<Element>();
final Document document;
DocBookBuilder(Document document) {
this.document = document;
stack.addFirst(document.createElement("root"));
}
List<Element> getElements() {
List<Element> elements = new ArrayList<Element>();
for (Node node = stack.getLast().getFirstChild(); node != null; node = node.getNextSibling()) {
elements.add((Element) node);
}
return elements;
}
public void appendChild(String text) {
appendChild(document.createTextNode(text));
}
public void appendChild(Node node) {
boolean inPara = false;
if (node instanceof Element) {
Element element = (Element) node;
if (element.getTagName().equals("para") && stack.getFirst().getTagName().equals("para")) {
pop();
inPara = true;
}
}
stack.getFirst().appendChild(node);
if (inPara) {
Element para = document.createElement("para");
push(para);
}
}
public void push(Element element) {
stack.getFirst().appendChild(element);
stack.addFirst(element);
}
public Element pop() {
Element element = stack.removeFirst();
if (emptyPara(element)) {
element.getParentNode().removeChild(element);
}
return element;
}
private boolean emptyPara(Element element) {
if (!element.getTagName().equals("para")) {
return false;
}
for (Node node = element.getFirstChild(); node != null; node = node.getNextSibling()) {
if (!(node instanceof Text)) {
return false;
}
Text text = (Text) node;
if (!text.getTextContent().matches("\\s*")) {
return false;
}
}
return true;
}
}