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org.apache.tika.parser.microsoft.HSLFExtractor Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.tika.parser.microsoft;
import java.io.IOException;
import java.util.HashSet;
import java.util.List;
import org.apache.poi.hslf.model.Comment;
import org.apache.poi.hslf.model.HeadersFooters;
import org.apache.poi.hslf.model.OLEShape;
import org.apache.poi.hslf.usermodel.HSLFMasterSheet;
import org.apache.poi.hslf.usermodel.HSLFNotes;
import org.apache.poi.hslf.usermodel.HSLFObjectData;
import org.apache.poi.hslf.usermodel.HSLFPictureData;
import org.apache.poi.hslf.usermodel.HSLFShape;
import org.apache.poi.hslf.usermodel.HSLFSlide;
import org.apache.poi.hslf.usermodel.HSLFSlideShow;
import org.apache.poi.hslf.usermodel.HSLFTable;
import org.apache.poi.hslf.usermodel.HSLFTableCell;
import org.apache.poi.hslf.usermodel.HSLFTextParagraph;
import org.apache.poi.hslf.usermodel.HSLFTextRun;
import org.apache.poi.hslf.usermodel.HSLFTextShape;
import org.apache.poi.poifs.filesystem.DirectoryNode;
import org.apache.poi.poifs.filesystem.NPOIFSFileSystem;
import org.apache.tika.exception.TikaException;
import org.apache.tika.io.TikaInputStream;
import org.apache.tika.parser.ParseContext;
import org.apache.tika.sax.XHTMLContentHandler;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.AttributesImpl;
public class HSLFExtractor extends AbstractPOIFSExtractor {
public HSLFExtractor(ParseContext context) {
super(context);
}
protected void parse(
NPOIFSFileSystem filesystem, XHTMLContentHandler xhtml)
throws IOException, SAXException, TikaException {
parse(filesystem.getRoot(), xhtml);
}
protected void parse(
DirectoryNode root, XHTMLContentHandler xhtml)
throws IOException, SAXException, TikaException {
HSLFSlideShow ss = new HSLFSlideShow(root);
List _slides = ss.getSlides();
xhtml.startElement("div", "class", "slideShow");
/* Iterate over slides and extract text */
for (HSLFSlide slide : _slides) {
xhtml.startElement("div", "class", "slide");
// Slide header, if present
HeadersFooters hf = slide.getHeadersFooters();
if (hf != null && hf.isHeaderVisible() && hf.getHeaderText() != null) {
xhtml.startElement("p", "class", "slide-header");
xhtml.characters(hf.getHeaderText());
xhtml.endElement("p");
}
// Slide master, if present
extractMaster(xhtml, slide.getMasterSheet());
// Slide text
{
xhtml.startElement("div", "class", "slide-content");
textRunsToText(xhtml, slide.getTextParagraphs());
xhtml.endElement("div");
}
// Table text
for (HSLFShape shape : slide.getShapes()) {
if (shape instanceof HSLFTable) {
extractTableText(xhtml, (HSLFTable) shape);
}
}
// Slide footer, if present
if (hf != null && hf.isFooterVisible() && hf.getFooterText() != null) {
xhtml.startElement("p", "class", "slide-footer");
xhtml.characters(hf.getFooterText());
xhtml.endElement("p");
}
// Comments, if present
StringBuilder authorStringBuilder = new StringBuilder();
for (Comment comment : slide.getComments()) {
authorStringBuilder.setLength(0);
xhtml.startElement("p", "class", "slide-comment");
if (comment.getAuthor() != null) {
authorStringBuilder.append(comment.getAuthor());
}
if (comment.getAuthorInitials() != null) {
if (authorStringBuilder.length() > 0) {
authorStringBuilder.append(" ");
}
authorStringBuilder.append("("+comment.getAuthorInitials()+")");
}
if (authorStringBuilder.length() > 0) {
if (comment.getText() != null) {
authorStringBuilder.append(" - ");
}
xhtml.startElement("b");
xhtml.characters(authorStringBuilder.toString());
xhtml.endElement("b");
}
if (comment.getText() != null) {
xhtml.characters(comment.getText());
}
xhtml.endElement("p");
}
// Now any embedded resources
handleSlideEmbeddedResources(slide, xhtml);
// Find the Notes for this slide and extract inline
HSLFNotes notes = slide.getNotes();
if (notes != null) {
xhtml.startElement("div", "class", "slide-notes");
textRunsToText(xhtml, notes.getTextParagraphs());
xhtml.endElement("div");
}
// Slide complete
xhtml.endElement("div");
}
// All slides done
xhtml.endElement("div");
/* notes */
xhtml.startElement("div", "class", "slide-notes");
HashSet seenNotes = new HashSet<>();
HeadersFooters hf = ss.getNotesHeadersFooters();
for (HSLFSlide slide : _slides) {
HSLFNotes notes = slide.getNotes();
if (notes == null) {
continue;
}
Integer id = notes._getSheetNumber();
if (seenNotes.contains(id)) {
continue;
}
seenNotes.add(id);
// Repeat the Notes header, if set
if (hf != null && hf.isHeaderVisible() && hf.getHeaderText() != null) {
xhtml.startElement("p", "class", "slide-note-header");
xhtml.characters(hf.getHeaderText());
xhtml.endElement("p");
}
// Notes text
textRunsToText(xhtml, notes.getTextParagraphs());
// Repeat the notes footer, if set
if (hf != null && hf.isFooterVisible() && hf.getFooterText() != null) {
xhtml.startElement("p", "class", "slide-note-footer");
xhtml.characters(hf.getFooterText());
xhtml.endElement("p");
}
}
handleSlideEmbeddedPictures(ss, xhtml);
xhtml.endElement("div");
}
private void extractMaster(XHTMLContentHandler xhtml, HSLFMasterSheet master) throws SAXException {
if (master == null) {
return;
}
List shapes = master.getShapes();
if (shapes == null || shapes.isEmpty()) {
return;
}
xhtml.startElement("div", "class", "slide-master-content");
for (HSLFShape shape : shapes) {
if (shape != null && !HSLFMasterSheet.isPlaceholder(shape)) {
if (shape instanceof HSLFTextShape) {
HSLFTextShape tsh = (HSLFTextShape) shape;
String text = tsh.getText();
if (text != null) {
xhtml.element("p", text);
}
}
}
}
xhtml.endElement("div");
}
private void extractTableText(XHTMLContentHandler xhtml, HSLFTable shape) throws SAXException {
xhtml.startElement("table");
for (int row = 0; row < shape.getNumberOfRows(); row++) {
xhtml.startElement("tr");
for (int col = 0; col < shape.getNumberOfColumns(); col++) {
HSLFTableCell cell = shape.getCell(row, col);
//insert empty string for empty cell if cell is null
String txt = "";
if (cell != null) {
txt = cell.getText();
}
xhtml.element("td", txt);
}
xhtml.endElement("tr");
}
xhtml.endElement("table");
}
private void textRunsToText(XHTMLContentHandler xhtml, List> paragraphsList) throws SAXException {
if (paragraphsList == null) {
return;
}
for (List run : paragraphsList) {
// Leaving in wisdom from TIKA-712 for easy revert.
// Avoid boiler-plate text on the master slide (0
// = TextHeaderAtom.TITLE_TYPE, 1 = TextHeaderAtom.BODY_TYPE):
//if (!isMaster || (run.getRunType() != 0 && run.getRunType() != 1)) {
boolean isBullet = false;
for (HSLFTextParagraph htp : run) {
boolean nextBullet = htp.isBullet();
// TODO: identify bullet/list type
if (isBullet != nextBullet) {
isBullet = nextBullet;
if (isBullet) {
xhtml.startElement("ul");
} else {
xhtml.endElement("ul");
}
}
List textRuns = htp.getTextRuns();
String firstLine = removePBreak(textRuns.get(0).getRawText());
boolean showBullet = (isBullet && (textRuns.size() > 1 || !"".equals(firstLine)));
String paraTag = showBullet ? "li" : "p";
xhtml.startElement(paraTag);
for (HSLFTextRun htr : textRuns) {
String line = htr.getRawText();
if (line != null) {
boolean isfirst = true;
for (String fragment : line.split("\\u000b")) {
if (!isfirst) {
xhtml.startElement("br");
xhtml.endElement("br");
}
isfirst = false;
xhtml.characters(removePBreak(fragment));
}
if (line.endsWith("\u000b")) {
xhtml.startElement("br");
xhtml.endElement("br");
}
}
}
xhtml.endElement(paraTag);
}
if (isBullet) {
xhtml.endElement("ul");
}
}
}
// remove trailing paragraph break
private static String removePBreak(String fragment) {
// the last text run of a text paragraph contains the paragraph break (\r)
// line breaks (\\u000b) can happen more often
return fragment.replaceFirst("\\r$", "");
}
private void handleSlideEmbeddedPictures(HSLFSlideShow slideshow, XHTMLContentHandler xhtml)
throws TikaException, SAXException, IOException {
for (HSLFPictureData pic : slideshow.getPictureData()) {
String mediaType;
switch (pic.getType()) {
case EMF:
mediaType = "application/x-emf";
break;
case WMF:
mediaType = "application/x-msmetafile";
break;
case DIB:
mediaType = "image/bmp";
break;
default:
mediaType = pic.getContentType();
break;
}
handleEmbeddedResource(
TikaInputStream.get(pic.getData()), null, null,
mediaType, xhtml, false);
}
}
private void handleSlideEmbeddedResources(HSLFSlide slide, XHTMLContentHandler xhtml)
throws TikaException, SAXException, IOException {
List shapes;
try {
shapes = slide.getShapes();
} catch (NullPointerException e) {
// Sometimes HSLF hits problems
// Please open POI bugs for any you come across!
return;
}
for (HSLFShape shape : shapes) {
if (shape instanceof OLEShape) {
OLEShape oleShape = (OLEShape) shape;
HSLFObjectData data = null;
try {
data = oleShape.getObjectData();
} catch (NullPointerException e) {
/* getObjectData throws NPE some times. */
}
if (data != null) {
String objID = Integer.toString(oleShape.getObjectID());
// Embedded Object: add a
so consumer can see where
// in the main text each embedded document
// occurred:
AttributesImpl attributes = new AttributesImpl();
attributes.addAttribute("", "class", "class", "CDATA", "embedded");
attributes.addAttribute("", "id", "id", "CDATA", objID);
xhtml.startElement("div", attributes);
xhtml.endElement("div");
try (TikaInputStream stream = TikaInputStream.get(data.getData())) {
String mediaType = null;
if ("Excel.Chart.8".equals(oleShape.getProgID())) {
mediaType = "application/vnd.ms-excel";
}
handleEmbeddedResource(
stream, objID, objID,
mediaType, xhtml, false);
}
}
}
}
}
}
