org.apache.poi.xslf.util.PPTHandler Maven / Gradle / Ivy
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The Apache Commons Codec package contains simple encoder and decoders for
various formats such as Base64 and Hexadecimal. In addition to these
widely used encoders and decoders, the codec package also maintains a
collection of phonetic encoding utilities.
/*
* ====================================================================
* 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.poi.xslf.util;
import static java.util.Spliterator.NONNULL;
import static java.util.Spliterator.ORDERED;
import java.awt.Graphics2D;
import java.awt.geom.Dimension2D;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.Charset;
import java.util.Set;
import java.util.Spliterator;
import java.util.Spliterators;
import java.util.TreeSet;
import java.util.function.Consumer;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Collectors;
import java.util.stream.IntStream;
import java.util.stream.Stream;
import java.util.stream.StreamSupport;
import org.apache.poi.common.usermodel.GenericRecord;
import org.apache.poi.sl.draw.EmbeddedExtractor.EmbeddedPart;
import org.apache.poi.sl.usermodel.ObjectData;
import org.apache.poi.sl.usermodel.ObjectShape;
import org.apache.poi.sl.usermodel.Shape;
import org.apache.poi.sl.usermodel.Slide;
import org.apache.poi.sl.usermodel.SlideShow;
import org.apache.poi.sl.usermodel.SlideShowFactory;
import org.apache.poi.util.IOUtils;
import org.apache.poi.util.Internal;
import org.apache.poi.util.LocaleUtil;
/** Handler for ppt and pptx files */
@Internal
class PPTHandler extends MFProxy {
private SlideShow ppt;
private Slide slide;
private Charset defaultCharset = LocaleUtil.CHARSET_1252;
@Override
public void parse(File file) throws IOException {
try {
ppt = SlideShowFactory.create(file, null, true);
} catch (IOException e) {
if (e.getMessage().contains("scratchpad")) {
throw new PPTX2PNG.NoScratchpadException(e);
} else {
throw e;
}
}
if (ppt == null) {
throw new IOException("Unknown file format or missing poi-scratchpad.jar / poi-ooxml.jar");
}
slide = ppt.getSlides().get(0);
}
@Override
public void parse(InputStream is) throws IOException {
try {
ppt = SlideShowFactory.create(is, null);
} catch (IOException e) {
if (e.getMessage().contains("scratchpad")) {
throw new PPTX2PNG.NoScratchpadException(e);
} else {
throw e;
}
}
if (ppt == null) {
throw new IOException("Unknown file format or missing poi-scratchpad.jar / poi-ooxml.jar");
}
slide = ppt.getSlides().get(0);
}
@Override
public Dimension2D getSize() {
return ppt.getPageSize();
}
@Override
public int getSlideCount() {
return ppt.getSlides().size();
}
@Override
public void setSlideNo(int slideNo) {
slide = ppt.getSlides().get(slideNo-1);
}
@Override
public String getTitle() {
return slide.getTitle();
}
private static final String RANGE_PATTERN = "(^|,)(?\\d+)?(-(?\\d+))?";
@Override
public Set slideIndexes(String range) {
final Matcher matcher = Pattern.compile(RANGE_PATTERN).matcher(range);
Spliterator sp = new Spliterators.AbstractSpliterator(range.length(), ORDERED|NONNULL){
@Override
public boolean tryAdvance(Consumer action) {
boolean b = matcher.find();
if (b) {
action.accept(matcher);
}
return b;
}
};
return StreamSupport.stream(sp, false).
flatMap(this::range).
collect(Collectors.toCollection(TreeSet::new));
}
@Override
public void draw(Graphics2D ctx) {
slide.draw(ctx);
}
@Override
public void close() throws IOException {
if (ppt != null) {
ppt.close();
}
}
@Override
public GenericRecord getRoot() {
return (ppt instanceof GenericRecord) ? (GenericRecord)ppt : null;
}
private Stream range(Matcher m) {
final int slideCount = ppt.getSlides().size();
String fromStr = m.group("from");
String toStr = m.group("to");
int from = (fromStr == null || fromStr.isEmpty() ? 1 : Integer.parseInt(fromStr));
int to = (toStr == null) ? from
: (toStr.isEmpty() || ((fromStr == null || fromStr.isEmpty()) && "1".equals(toStr))) ? slideCount
: Integer.parseInt(toStr);
return IntStream.rangeClosed(from, to).filter(i -> i <= slideCount).boxed();
}
@Override
public Iterable getEmbeddings(int slideNo) {
return () -> ppt.getSlides().get(slideNo).getShapes().stream().
filter(s -> s instanceof ObjectShape).
map(PPTHandler::fromObjectShape).
iterator()
;
}
private static EmbeddedPart fromObjectShape(Shape s) {
final ObjectShape os = (ObjectShape)s;
final ObjectData od = os.getObjectData();
EmbeddedPart embed = new EmbeddedPart();
embed.setName(od.getFileName());
embed.setData(() -> {
try (InputStream is = od.getInputStream()) {
return IOUtils.toByteArray(is);
} catch (IOException e) {
// TODO: change to custom runtime exception
throw new RuntimeException(e);
}
});
return embed;
}
@Override
void setDefaultCharset(Charset charset) {
}
}