org.apache.pdfbox.pdmodel.interactive.annotation.handlers.PDInkAppearanceHandler Maven / Gradle / Ivy
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The Apache PDFBox library is an open source Java tool for working with PDF documents.
/*
* Copyright 2018 The Apache Software Foundation.
*
* 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.apache.pdfbox.pdmodel.interactive.annotation.handlers;
import java.io.IOException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.pdfbox.pdmodel.graphics.color.PDColor;
import org.apache.pdfbox.pdmodel.interactive.annotation.PDAnnotation;
import org.apache.pdfbox.pdmodel.interactive.annotation.PDAnnotationMarkup;
import org.apache.pdfbox.io.IOUtils;
import org.apache.pdfbox.pdmodel.PDAppearanceContentStream;
/**
* Handler to generate the ink annotations appearance.
*
*/
public class PDInkAppearanceHandler extends PDAbstractAppearanceHandler
{
private static final Log LOG = LogFactory.getLog(PDInkAppearanceHandler.class);
public PDInkAppearanceHandler(PDAnnotation annotation)
{
super(annotation);
}
@Override
public void generateAppearanceStreams()
{
generateNormalAppearance();
generateRolloverAppearance();
generateDownAppearance();
}
@Override
public void generateNormalAppearance()
{
PDAnnotationMarkup ink = (PDAnnotationMarkup) getAnnotation();
// PDF spec does not mention /Border for ink annotations, but it is used if /BS is not available
AnnotationBorder ab = AnnotationBorder.getAnnotationBorder(ink, ink.getBorderStyle());
PDColor color = ink.getColor();
if (color == null || color.getComponents().length == 0 || Float.compare(ab.width, 0) == 0)
{
return;
}
PDAppearanceContentStream cs = null;
try
{
cs = getNormalAppearanceAsContentStream();
setOpacity(cs, ink.getConstantOpacity());
cs.setStrokingColor(color);
if (ab.dashArray != null)
{
cs.setLineDashPattern(ab.dashArray, 0);
}
cs.setLineWidth(ab.width);
for (float[] pathArray : ink.getInkList())
{
int nPoints = pathArray.length / 2;
// "When drawn, the points shall be connected by straight lines or curves
// in an implementation-dependent way" - we do lines.
for (int i = 0; i < nPoints; ++i)
{
float x = pathArray[i * 2];
float y = pathArray[i * 2 + 1];
if (i == 0)
{
cs.moveTo(x, y);
}
else
{
cs.lineTo(x, y);
}
}
cs.stroke();
}
}
catch (IOException ex)
{
LOG.error(ex);
}
finally
{
IOUtils.closeQuietly(cs);
}
}
@Override
public void generateRolloverAppearance()
{
// No rollover appearance generated
}
@Override
public void generateDownAppearance()
{
// No down appearance generated
}
}