44f4c68801
git-svn-id: svn://svn.code.sf.net/p/writer2latex/code/trunk@272 f0f2a975-2e09-46c8-9428-3b39399b9f3c
130 lines
5 KiB
Java
130 lines
5 KiB
Java
/************************************************************************
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*
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* NavigationWriter.java
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*
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* Copyright: 2001-2015 by Henrik Just
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*
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* This file is part of Writer2LaTeX.
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*
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* Writer2LaTeX is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Writer2LaTeX is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Writer2LaTeX. If not, see <http://www.gnu.org/licenses/>.
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*
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* version 1.6 (2015-04-21)
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*
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*/
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package writer2latex.epub;
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import java.util.Iterator;
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import javax.xml.parsers.DocumentBuilder;
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import javax.xml.parsers.DocumentBuilderFactory;
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import javax.xml.parsers.ParserConfigurationException;
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import org.w3c.dom.DOMImplementation;
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import org.w3c.dom.Document;
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import org.w3c.dom.DocumentType;
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import org.w3c.dom.Element;
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import writer2latex.api.ContentEntry;
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import writer2latex.api.ConverterResult;
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import writer2latex.base.DOMDocument;
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import writer2latex.util.Misc;
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/** This class writes the EPUB Navigation Document as defined in EPUB 3
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*/
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public class NavigationWriter extends DOMDocument {
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public NavigationWriter(ConverterResult cr) {
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super("nav", "xhtml");
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// create DOM
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Document contentDOM = null;
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try {
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DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance();
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DocumentBuilder builder = builderFactory.newDocumentBuilder();
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DOMImplementation domImpl = builder.getDOMImplementation();
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DocumentType doctype = domImpl.createDocumentType("xhtml","","");
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contentDOM = domImpl.createDocument("http://www.w3.org/1999/xhtml","html",doctype);
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}
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catch (ParserConfigurationException t) { // this should never happen
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throw new RuntimeException(t);
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}
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// Populate the DOM tree
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Element doc = contentDOM.getDocumentElement();
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doc.setAttribute("xmlns","http://www.w3.org/1999/xhtml");
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doc.setAttribute("xmlns:epub","http://www.idpf.org/2007/ops");
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doc.setAttribute("xml:lang", cr.getMetaData().getLanguage());
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doc.setAttribute("lang", cr.getMetaData().getLanguage());
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// Create and populate the head
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Element head = contentDOM.createElement("head");
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doc.appendChild(head);
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Element title = contentDOM.createElement("title");
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head.appendChild(title);
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title.appendChild(contentDOM.createTextNode("EPUB 3 Navigation Document"));
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// Or use the document title cr.getMetaData().getTitle()?
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// Create the body
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Element body = contentDOM.createElement("body");
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doc.appendChild(body);
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// Create nav element
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Element nav = contentDOM.createElement("nav");
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nav.setAttribute("epub:type", "toc");
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body.appendChild(nav);
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// Populate the nav element from the content table in the converter result
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Element currentContainer = body;
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int nCurrentLevel = 0;
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int nCurrentEntryLevel = 0; // This may differ from nCurrentLevel if the heading levels "jump" in then document
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Iterator<ContentEntry> content = cr.getContent().iterator();
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while (content.hasNext()) {
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ContentEntry entry = content.next();
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int nEntryLevel = Math.max(entry.getLevel(), 1);
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if (nEntryLevel<nCurrentLevel) {
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// Return to higher level
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for (int i=nEntryLevel; i<nCurrentLevel; i++) {
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currentContainer = (Element) currentContainer.getParentNode().getParentNode();
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}
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nCurrentLevel = nEntryLevel;
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}
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else if (nEntryLevel>nCurrentEntryLevel) {
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// To lower level (always one step; a jump from e.g. heading 1 to heading 3 in the document
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// is considered an error)
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currentContainer = (Element) currentContainer.getLastChild();
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Element ol = contentDOM.createElement("ol");
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currentContainer.appendChild(ol);
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currentContainer = ol;
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nCurrentLevel++;
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}
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nCurrentEntryLevel = nEntryLevel;
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// Create the actual toc entry
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Element li = contentDOM.createElement("li");
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currentContainer.appendChild(li);
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Element a = contentDOM.createElement("a");
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li.appendChild(a);
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String sHref = Misc.makeHref(entry.getFile().getFileName());
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if (entry.getTarget()!=null) { sHref+="#"+entry.getTarget(); }
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a.setAttribute("href", sHref);
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a.appendChild(contentDOM.createTextNode(entry.getTitle()));
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}
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setContentDOM(contentDOM);
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}
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}
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